9696 строки
265 KiB
C
9696 строки
265 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/* SCTP kernel implementation
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* (C) Copyright IBM Corp. 2001, 2004
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* Copyright (c) 1999-2000 Cisco, Inc.
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* Copyright (c) 1999-2001 Motorola, Inc.
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* Copyright (c) 2001-2003 Intel Corp.
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* Copyright (c) 2001-2002 Nokia, Inc.
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* Copyright (c) 2001 La Monte H.P. Yarroll
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*
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* This file is part of the SCTP kernel implementation
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*
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* These functions interface with the sockets layer to implement the
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* SCTP Extensions for the Sockets API.
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*
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* Note that the descriptions from the specification are USER level
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* functions--this file is the functions which populate the struct proto
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* for SCTP which is the BOTTOM of the sockets interface.
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*
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* Please send any bug reports or fixes you make to the
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* email address(es):
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* lksctp developers <linux-sctp@vger.kernel.org>
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*
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* Written or modified by:
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* La Monte H.P. Yarroll <piggy@acm.org>
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* Narasimha Budihal <narsi@refcode.org>
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* Karl Knutson <karl@athena.chicago.il.us>
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* Jon Grimm <jgrimm@us.ibm.com>
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* Xingang Guo <xingang.guo@intel.com>
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* Daisy Chang <daisyc@us.ibm.com>
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* Sridhar Samudrala <samudrala@us.ibm.com>
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* Inaky Perez-Gonzalez <inaky.gonzalez@intel.com>
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* Ardelle Fan <ardelle.fan@intel.com>
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* Ryan Layer <rmlayer@us.ibm.com>
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* Anup Pemmaiah <pemmaiah@cc.usu.edu>
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* Kevin Gao <kevin.gao@intel.com>
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <crypto/hash.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/wait.h>
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#include <linux/time.h>
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#include <linux/sched/signal.h>
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#include <linux/ip.h>
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#include <linux/capability.h>
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#include <linux/fcntl.h>
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#include <linux/poll.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/file.h>
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#include <linux/compat.h>
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#include <linux/rhashtable.h>
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#include <net/ip.h>
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#include <net/icmp.h>
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#include <net/route.h>
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#include <net/ipv6.h>
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#include <net/inet_common.h>
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#include <net/busy_poll.h>
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#include <linux/socket.h> /* for sa_family_t */
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#include <linux/export.h>
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#include <net/sock.h>
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#include <net/sctp/sctp.h>
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#include <net/sctp/sm.h>
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#include <net/sctp/stream_sched.h>
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/* Forward declarations for internal helper functions. */
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static bool sctp_writeable(struct sock *sk);
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static void sctp_wfree(struct sk_buff *skb);
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static int sctp_wait_for_sndbuf(struct sctp_association *asoc, long *timeo_p,
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size_t msg_len);
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static int sctp_wait_for_packet(struct sock *sk, int *err, long *timeo_p);
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static int sctp_wait_for_connect(struct sctp_association *, long *timeo_p);
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static int sctp_wait_for_accept(struct sock *sk, long timeo);
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static void sctp_wait_for_close(struct sock *sk, long timeo);
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static void sctp_destruct_sock(struct sock *sk);
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static struct sctp_af *sctp_sockaddr_af(struct sctp_sock *opt,
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union sctp_addr *addr, int len);
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static int sctp_bindx_add(struct sock *, struct sockaddr *, int);
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static int sctp_bindx_rem(struct sock *, struct sockaddr *, int);
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static int sctp_send_asconf_add_ip(struct sock *, struct sockaddr *, int);
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static int sctp_send_asconf_del_ip(struct sock *, struct sockaddr *, int);
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static int sctp_send_asconf(struct sctp_association *asoc,
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struct sctp_chunk *chunk);
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static int sctp_do_bind(struct sock *, union sctp_addr *, int);
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static int sctp_autobind(struct sock *sk);
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static int sctp_sock_migrate(struct sock *oldsk, struct sock *newsk,
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struct sctp_association *assoc,
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enum sctp_socket_type type);
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static unsigned long sctp_memory_pressure;
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static atomic_long_t sctp_memory_allocated;
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struct percpu_counter sctp_sockets_allocated;
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static void sctp_enter_memory_pressure(struct sock *sk)
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{
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sctp_memory_pressure = 1;
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}
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/* Get the sndbuf space available at the time on the association. */
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static inline int sctp_wspace(struct sctp_association *asoc)
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{
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struct sock *sk = asoc->base.sk;
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return asoc->ep->sndbuf_policy ? sk->sk_sndbuf - asoc->sndbuf_used
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: sk_stream_wspace(sk);
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}
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/* Increment the used sndbuf space count of the corresponding association by
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* the size of the outgoing data chunk.
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* Also, set the skb destructor for sndbuf accounting later.
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*
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* Since it is always 1-1 between chunk and skb, and also a new skb is always
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* allocated for chunk bundling in sctp_packet_transmit(), we can use the
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* destructor in the data chunk skb for the purpose of the sndbuf space
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* tracking.
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*/
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static inline void sctp_set_owner_w(struct sctp_chunk *chunk)
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{
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struct sctp_association *asoc = chunk->asoc;
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struct sock *sk = asoc->base.sk;
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/* The sndbuf space is tracked per association. */
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sctp_association_hold(asoc);
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if (chunk->shkey)
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sctp_auth_shkey_hold(chunk->shkey);
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skb_set_owner_w(chunk->skb, sk);
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chunk->skb->destructor = sctp_wfree;
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/* Save the chunk pointer in skb for sctp_wfree to use later. */
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skb_shinfo(chunk->skb)->destructor_arg = chunk;
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refcount_add(sizeof(struct sctp_chunk), &sk->sk_wmem_alloc);
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asoc->sndbuf_used += chunk->skb->truesize + sizeof(struct sctp_chunk);
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sk->sk_wmem_queued += chunk->skb->truesize + sizeof(struct sctp_chunk);
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sk_mem_charge(sk, chunk->skb->truesize);
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}
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static void sctp_clear_owner_w(struct sctp_chunk *chunk)
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{
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skb_orphan(chunk->skb);
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}
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#define traverse_and_process() \
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do { \
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msg = chunk->msg; \
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if (msg == prev_msg) \
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continue; \
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list_for_each_entry(c, &msg->chunks, frag_list) { \
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if ((clear && asoc->base.sk == c->skb->sk) || \
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(!clear && asoc->base.sk != c->skb->sk)) \
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cb(c); \
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} \
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prev_msg = msg; \
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} while (0)
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static void sctp_for_each_tx_datachunk(struct sctp_association *asoc,
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bool clear,
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void (*cb)(struct sctp_chunk *))
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{
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struct sctp_datamsg *msg, *prev_msg = NULL;
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struct sctp_outq *q = &asoc->outqueue;
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struct sctp_chunk *chunk, *c;
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struct sctp_transport *t;
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list_for_each_entry(t, &asoc->peer.transport_addr_list, transports)
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list_for_each_entry(chunk, &t->transmitted, transmitted_list)
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traverse_and_process();
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list_for_each_entry(chunk, &q->retransmit, transmitted_list)
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traverse_and_process();
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list_for_each_entry(chunk, &q->sacked, transmitted_list)
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traverse_and_process();
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list_for_each_entry(chunk, &q->abandoned, transmitted_list)
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traverse_and_process();
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list_for_each_entry(chunk, &q->out_chunk_list, list)
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traverse_and_process();
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}
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static void sctp_for_each_rx_skb(struct sctp_association *asoc, struct sock *sk,
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void (*cb)(struct sk_buff *, struct sock *))
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{
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struct sk_buff *skb, *tmp;
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sctp_skb_for_each(skb, &asoc->ulpq.lobby, tmp)
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cb(skb, sk);
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sctp_skb_for_each(skb, &asoc->ulpq.reasm, tmp)
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cb(skb, sk);
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sctp_skb_for_each(skb, &asoc->ulpq.reasm_uo, tmp)
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cb(skb, sk);
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}
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/* Verify that this is a valid address. */
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static inline int sctp_verify_addr(struct sock *sk, union sctp_addr *addr,
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int len)
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{
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struct sctp_af *af;
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/* Verify basic sockaddr. */
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af = sctp_sockaddr_af(sctp_sk(sk), addr, len);
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if (!af)
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return -EINVAL;
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/* Is this a valid SCTP address? */
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if (!af->addr_valid(addr, sctp_sk(sk), NULL))
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return -EINVAL;
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if (!sctp_sk(sk)->pf->send_verify(sctp_sk(sk), (addr)))
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return -EINVAL;
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return 0;
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}
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/* Look up the association by its id. If this is not a UDP-style
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* socket, the ID field is always ignored.
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*/
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struct sctp_association *sctp_id2assoc(struct sock *sk, sctp_assoc_t id)
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{
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struct sctp_association *asoc = NULL;
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/* If this is not a UDP-style socket, assoc id should be ignored. */
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if (!sctp_style(sk, UDP)) {
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/* Return NULL if the socket state is not ESTABLISHED. It
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* could be a TCP-style listening socket or a socket which
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* hasn't yet called connect() to establish an association.
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*/
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if (!sctp_sstate(sk, ESTABLISHED) && !sctp_sstate(sk, CLOSING))
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return NULL;
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/* Get the first and the only association from the list. */
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if (!list_empty(&sctp_sk(sk)->ep->asocs))
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asoc = list_entry(sctp_sk(sk)->ep->asocs.next,
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struct sctp_association, asocs);
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return asoc;
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}
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/* Otherwise this is a UDP-style socket. */
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if (id <= SCTP_ALL_ASSOC)
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return NULL;
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spin_lock_bh(&sctp_assocs_id_lock);
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asoc = (struct sctp_association *)idr_find(&sctp_assocs_id, (int)id);
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if (asoc && (asoc->base.sk != sk || asoc->base.dead))
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asoc = NULL;
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spin_unlock_bh(&sctp_assocs_id_lock);
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return asoc;
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}
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/* Look up the transport from an address and an assoc id. If both address and
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* id are specified, the associations matching the address and the id should be
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* the same.
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*/
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static struct sctp_transport *sctp_addr_id2transport(struct sock *sk,
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struct sockaddr_storage *addr,
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sctp_assoc_t id)
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{
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struct sctp_association *addr_asoc = NULL, *id_asoc = NULL;
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struct sctp_af *af = sctp_get_af_specific(addr->ss_family);
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union sctp_addr *laddr = (union sctp_addr *)addr;
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struct sctp_transport *transport;
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if (!af || sctp_verify_addr(sk, laddr, af->sockaddr_len))
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return NULL;
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addr_asoc = sctp_endpoint_lookup_assoc(sctp_sk(sk)->ep,
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laddr,
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&transport);
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if (!addr_asoc)
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return NULL;
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id_asoc = sctp_id2assoc(sk, id);
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if (id_asoc && (id_asoc != addr_asoc))
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return NULL;
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sctp_get_pf_specific(sk->sk_family)->addr_to_user(sctp_sk(sk),
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(union sctp_addr *)addr);
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return transport;
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}
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/* API 3.1.2 bind() - UDP Style Syntax
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* The syntax of bind() is,
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*
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* ret = bind(int sd, struct sockaddr *addr, int addrlen);
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*
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* sd - the socket descriptor returned by socket().
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* addr - the address structure (struct sockaddr_in or struct
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* sockaddr_in6 [RFC 2553]),
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* addr_len - the size of the address structure.
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*/
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static int sctp_bind(struct sock *sk, struct sockaddr *addr, int addr_len)
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{
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int retval = 0;
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lock_sock(sk);
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pr_debug("%s: sk:%p, addr:%p, addr_len:%d\n", __func__, sk,
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addr, addr_len);
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/* Disallow binding twice. */
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if (!sctp_sk(sk)->ep->base.bind_addr.port)
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retval = sctp_do_bind(sk, (union sctp_addr *)addr,
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addr_len);
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else
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retval = -EINVAL;
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release_sock(sk);
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return retval;
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}
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static int sctp_get_port_local(struct sock *, union sctp_addr *);
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/* Verify this is a valid sockaddr. */
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static struct sctp_af *sctp_sockaddr_af(struct sctp_sock *opt,
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union sctp_addr *addr, int len)
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{
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struct sctp_af *af;
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/* Check minimum size. */
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if (len < sizeof (struct sockaddr))
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return NULL;
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if (!opt->pf->af_supported(addr->sa.sa_family, opt))
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return NULL;
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if (addr->sa.sa_family == AF_INET6) {
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if (len < SIN6_LEN_RFC2133)
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return NULL;
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/* V4 mapped address are really of AF_INET family */
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if (ipv6_addr_v4mapped(&addr->v6.sin6_addr) &&
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!opt->pf->af_supported(AF_INET, opt))
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return NULL;
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}
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/* If we get this far, af is valid. */
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af = sctp_get_af_specific(addr->sa.sa_family);
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if (len < af->sockaddr_len)
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return NULL;
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return af;
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}
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static void sctp_auto_asconf_init(struct sctp_sock *sp)
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{
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struct net *net = sock_net(&sp->inet.sk);
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if (net->sctp.default_auto_asconf) {
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spin_lock(&net->sctp.addr_wq_lock);
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list_add_tail(&sp->auto_asconf_list, &net->sctp.auto_asconf_splist);
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spin_unlock(&net->sctp.addr_wq_lock);
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sp->do_auto_asconf = 1;
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}
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}
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/* Bind a local address either to an endpoint or to an association. */
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static int sctp_do_bind(struct sock *sk, union sctp_addr *addr, int len)
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{
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struct net *net = sock_net(sk);
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struct sctp_sock *sp = sctp_sk(sk);
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struct sctp_endpoint *ep = sp->ep;
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struct sctp_bind_addr *bp = &ep->base.bind_addr;
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struct sctp_af *af;
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unsigned short snum;
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int ret = 0;
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/* Common sockaddr verification. */
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af = sctp_sockaddr_af(sp, addr, len);
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if (!af) {
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pr_debug("%s: sk:%p, newaddr:%p, len:%d EINVAL\n",
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__func__, sk, addr, len);
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return -EINVAL;
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}
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snum = ntohs(addr->v4.sin_port);
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pr_debug("%s: sk:%p, new addr:%pISc, port:%d, new port:%d, len:%d\n",
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__func__, sk, &addr->sa, bp->port, snum, len);
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/* PF specific bind() address verification. */
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if (!sp->pf->bind_verify(sp, addr))
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return -EADDRNOTAVAIL;
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/* We must either be unbound, or bind to the same port.
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* It's OK to allow 0 ports if we are already bound.
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* We'll just inhert an already bound port in this case
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*/
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if (bp->port) {
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if (!snum)
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snum = bp->port;
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else if (snum != bp->port) {
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pr_debug("%s: new port %d doesn't match existing port "
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"%d\n", __func__, snum, bp->port);
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return -EINVAL;
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}
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}
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if (snum && inet_port_requires_bind_service(net, snum) &&
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!ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
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return -EACCES;
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/* See if the address matches any of the addresses we may have
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* already bound before checking against other endpoints.
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*/
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if (sctp_bind_addr_match(bp, addr, sp))
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return -EINVAL;
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/* Make sure we are allowed to bind here.
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* The function sctp_get_port_local() does duplicate address
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* detection.
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*/
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addr->v4.sin_port = htons(snum);
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if (sctp_get_port_local(sk, addr))
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return -EADDRINUSE;
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/* Refresh ephemeral port. */
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if (!bp->port) {
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bp->port = inet_sk(sk)->inet_num;
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sctp_auto_asconf_init(sp);
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}
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/* Add the address to the bind address list.
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* Use GFP_ATOMIC since BHs will be disabled.
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*/
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ret = sctp_add_bind_addr(bp, addr, af->sockaddr_len,
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SCTP_ADDR_SRC, GFP_ATOMIC);
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if (ret) {
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sctp_put_port(sk);
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return ret;
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}
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/* Copy back into socket for getsockname() use. */
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inet_sk(sk)->inet_sport = htons(inet_sk(sk)->inet_num);
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sp->pf->to_sk_saddr(addr, sk);
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return ret;
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}
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/* ADDIP Section 4.1.1 Congestion Control of ASCONF Chunks
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*
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* R1) One and only one ASCONF Chunk MAY be in transit and unacknowledged
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* at any one time. If a sender, after sending an ASCONF chunk, decides
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* it needs to transfer another ASCONF Chunk, it MUST wait until the
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* ASCONF-ACK Chunk returns from the previous ASCONF Chunk before sending a
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* subsequent ASCONF. Note this restriction binds each side, so at any
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* time two ASCONF may be in-transit on any given association (one sent
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* from each endpoint).
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*/
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static int sctp_send_asconf(struct sctp_association *asoc,
|
|
struct sctp_chunk *chunk)
|
|
{
|
|
int retval = 0;
|
|
|
|
/* If there is an outstanding ASCONF chunk, queue it for later
|
|
* transmission.
|
|
*/
|
|
if (asoc->addip_last_asconf) {
|
|
list_add_tail(&chunk->list, &asoc->addip_chunk_list);
|
|
goto out;
|
|
}
|
|
|
|
/* Hold the chunk until an ASCONF_ACK is received. */
|
|
sctp_chunk_hold(chunk);
|
|
retval = sctp_primitive_ASCONF(asoc->base.net, asoc, chunk);
|
|
if (retval)
|
|
sctp_chunk_free(chunk);
|
|
else
|
|
asoc->addip_last_asconf = chunk;
|
|
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
/* Add a list of addresses as bind addresses to local endpoint or
|
|
* association.
|
|
*
|
|
* Basically run through each address specified in the addrs/addrcnt
|
|
* array/length pair, determine if it is IPv6 or IPv4 and call
|
|
* sctp_do_bind() on it.
|
|
*
|
|
* If any of them fails, then the operation will be reversed and the
|
|
* ones that were added will be removed.
|
|
*
|
|
* Only sctp_setsockopt_bindx() is supposed to call this function.
|
|
*/
|
|
static int sctp_bindx_add(struct sock *sk, struct sockaddr *addrs, int addrcnt)
|
|
{
|
|
int cnt;
|
|
int retval = 0;
|
|
void *addr_buf;
|
|
struct sockaddr *sa_addr;
|
|
struct sctp_af *af;
|
|
|
|
pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n", __func__, sk,
|
|
addrs, addrcnt);
|
|
|
|
addr_buf = addrs;
|
|
for (cnt = 0; cnt < addrcnt; cnt++) {
|
|
/* The list may contain either IPv4 or IPv6 address;
|
|
* determine the address length for walking thru the list.
|
|
*/
|
|
sa_addr = addr_buf;
|
|
af = sctp_get_af_specific(sa_addr->sa_family);
|
|
if (!af) {
|
|
retval = -EINVAL;
|
|
goto err_bindx_add;
|
|
}
|
|
|
|
retval = sctp_do_bind(sk, (union sctp_addr *)sa_addr,
|
|
af->sockaddr_len);
|
|
|
|
addr_buf += af->sockaddr_len;
|
|
|
|
err_bindx_add:
|
|
if (retval < 0) {
|
|
/* Failed. Cleanup the ones that have been added */
|
|
if (cnt > 0)
|
|
sctp_bindx_rem(sk, addrs, cnt);
|
|
return retval;
|
|
}
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
|
|
/* Send an ASCONF chunk with Add IP address parameters to all the peers of the
|
|
* associations that are part of the endpoint indicating that a list of local
|
|
* addresses are added to the endpoint.
|
|
*
|
|
* If any of the addresses is already in the bind address list of the
|
|
* association, we do not send the chunk for that association. But it will not
|
|
* affect other associations.
|
|
*
|
|
* Only sctp_setsockopt_bindx() is supposed to call this function.
|
|
*/
|
|
static int sctp_send_asconf_add_ip(struct sock *sk,
|
|
struct sockaddr *addrs,
|
|
int addrcnt)
|
|
{
|
|
struct sctp_sock *sp;
|
|
struct sctp_endpoint *ep;
|
|
struct sctp_association *asoc;
|
|
struct sctp_bind_addr *bp;
|
|
struct sctp_chunk *chunk;
|
|
struct sctp_sockaddr_entry *laddr;
|
|
union sctp_addr *addr;
|
|
union sctp_addr saveaddr;
|
|
void *addr_buf;
|
|
struct sctp_af *af;
|
|
struct list_head *p;
|
|
int i;
|
|
int retval = 0;
|
|
|
|
sp = sctp_sk(sk);
|
|
ep = sp->ep;
|
|
|
|
if (!ep->asconf_enable)
|
|
return retval;
|
|
|
|
pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n",
|
|
__func__, sk, addrs, addrcnt);
|
|
|
|
list_for_each_entry(asoc, &ep->asocs, asocs) {
|
|
if (!asoc->peer.asconf_capable)
|
|
continue;
|
|
|
|
if (asoc->peer.addip_disabled_mask & SCTP_PARAM_ADD_IP)
|
|
continue;
|
|
|
|
if (!sctp_state(asoc, ESTABLISHED))
|
|
continue;
|
|
|
|
/* Check if any address in the packed array of addresses is
|
|
* in the bind address list of the association. If so,
|
|
* do not send the asconf chunk to its peer, but continue with
|
|
* other associations.
|
|
*/
|
|
addr_buf = addrs;
|
|
for (i = 0; i < addrcnt; i++) {
|
|
addr = addr_buf;
|
|
af = sctp_get_af_specific(addr->v4.sin_family);
|
|
if (!af) {
|
|
retval = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (sctp_assoc_lookup_laddr(asoc, addr))
|
|
break;
|
|
|
|
addr_buf += af->sockaddr_len;
|
|
}
|
|
if (i < addrcnt)
|
|
continue;
|
|
|
|
/* Use the first valid address in bind addr list of
|
|
* association as Address Parameter of ASCONF CHUNK.
|
|
*/
|
|
bp = &asoc->base.bind_addr;
|
|
p = bp->address_list.next;
|
|
laddr = list_entry(p, struct sctp_sockaddr_entry, list);
|
|
chunk = sctp_make_asconf_update_ip(asoc, &laddr->a, addrs,
|
|
addrcnt, SCTP_PARAM_ADD_IP);
|
|
if (!chunk) {
|
|
retval = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
/* Add the new addresses to the bind address list with
|
|
* use_as_src set to 0.
|
|
*/
|
|
addr_buf = addrs;
|
|
for (i = 0; i < addrcnt; i++) {
|
|
addr = addr_buf;
|
|
af = sctp_get_af_specific(addr->v4.sin_family);
|
|
memcpy(&saveaddr, addr, af->sockaddr_len);
|
|
retval = sctp_add_bind_addr(bp, &saveaddr,
|
|
sizeof(saveaddr),
|
|
SCTP_ADDR_NEW, GFP_ATOMIC);
|
|
addr_buf += af->sockaddr_len;
|
|
}
|
|
if (asoc->src_out_of_asoc_ok) {
|
|
struct sctp_transport *trans;
|
|
|
|
list_for_each_entry(trans,
|
|
&asoc->peer.transport_addr_list, transports) {
|
|
trans->cwnd = min(4*asoc->pathmtu, max_t(__u32,
|
|
2*asoc->pathmtu, 4380));
|
|
trans->ssthresh = asoc->peer.i.a_rwnd;
|
|
trans->rto = asoc->rto_initial;
|
|
sctp_max_rto(asoc, trans);
|
|
trans->rtt = trans->srtt = trans->rttvar = 0;
|
|
/* Clear the source and route cache */
|
|
sctp_transport_route(trans, NULL,
|
|
sctp_sk(asoc->base.sk));
|
|
}
|
|
}
|
|
retval = sctp_send_asconf(asoc, chunk);
|
|
}
|
|
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
/* Remove a list of addresses from bind addresses list. Do not remove the
|
|
* last address.
|
|
*
|
|
* Basically run through each address specified in the addrs/addrcnt
|
|
* array/length pair, determine if it is IPv6 or IPv4 and call
|
|
* sctp_del_bind() on it.
|
|
*
|
|
* If any of them fails, then the operation will be reversed and the
|
|
* ones that were removed will be added back.
|
|
*
|
|
* At least one address has to be left; if only one address is
|
|
* available, the operation will return -EBUSY.
|
|
*
|
|
* Only sctp_setsockopt_bindx() is supposed to call this function.
|
|
*/
|
|
static int sctp_bindx_rem(struct sock *sk, struct sockaddr *addrs, int addrcnt)
|
|
{
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
struct sctp_endpoint *ep = sp->ep;
|
|
int cnt;
|
|
struct sctp_bind_addr *bp = &ep->base.bind_addr;
|
|
int retval = 0;
|
|
void *addr_buf;
|
|
union sctp_addr *sa_addr;
|
|
struct sctp_af *af;
|
|
|
|
pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n",
|
|
__func__, sk, addrs, addrcnt);
|
|
|
|
addr_buf = addrs;
|
|
for (cnt = 0; cnt < addrcnt; cnt++) {
|
|
/* If the bind address list is empty or if there is only one
|
|
* bind address, there is nothing more to be removed (we need
|
|
* at least one address here).
|
|
*/
|
|
if (list_empty(&bp->address_list) ||
|
|
(sctp_list_single_entry(&bp->address_list))) {
|
|
retval = -EBUSY;
|
|
goto err_bindx_rem;
|
|
}
|
|
|
|
sa_addr = addr_buf;
|
|
af = sctp_get_af_specific(sa_addr->sa.sa_family);
|
|
if (!af) {
|
|
retval = -EINVAL;
|
|
goto err_bindx_rem;
|
|
}
|
|
|
|
if (!af->addr_valid(sa_addr, sp, NULL)) {
|
|
retval = -EADDRNOTAVAIL;
|
|
goto err_bindx_rem;
|
|
}
|
|
|
|
if (sa_addr->v4.sin_port &&
|
|
sa_addr->v4.sin_port != htons(bp->port)) {
|
|
retval = -EINVAL;
|
|
goto err_bindx_rem;
|
|
}
|
|
|
|
if (!sa_addr->v4.sin_port)
|
|
sa_addr->v4.sin_port = htons(bp->port);
|
|
|
|
/* FIXME - There is probably a need to check if sk->sk_saddr and
|
|
* sk->sk_rcv_addr are currently set to one of the addresses to
|
|
* be removed. This is something which needs to be looked into
|
|
* when we are fixing the outstanding issues with multi-homing
|
|
* socket routing and failover schemes. Refer to comments in
|
|
* sctp_do_bind(). -daisy
|
|
*/
|
|
retval = sctp_del_bind_addr(bp, sa_addr);
|
|
|
|
addr_buf += af->sockaddr_len;
|
|
err_bindx_rem:
|
|
if (retval < 0) {
|
|
/* Failed. Add the ones that has been removed back */
|
|
if (cnt > 0)
|
|
sctp_bindx_add(sk, addrs, cnt);
|
|
return retval;
|
|
}
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
|
|
/* Send an ASCONF chunk with Delete IP address parameters to all the peers of
|
|
* the associations that are part of the endpoint indicating that a list of
|
|
* local addresses are removed from the endpoint.
|
|
*
|
|
* If any of the addresses is already in the bind address list of the
|
|
* association, we do not send the chunk for that association. But it will not
|
|
* affect other associations.
|
|
*
|
|
* Only sctp_setsockopt_bindx() is supposed to call this function.
|
|
*/
|
|
static int sctp_send_asconf_del_ip(struct sock *sk,
|
|
struct sockaddr *addrs,
|
|
int addrcnt)
|
|
{
|
|
struct sctp_sock *sp;
|
|
struct sctp_endpoint *ep;
|
|
struct sctp_association *asoc;
|
|
struct sctp_transport *transport;
|
|
struct sctp_bind_addr *bp;
|
|
struct sctp_chunk *chunk;
|
|
union sctp_addr *laddr;
|
|
void *addr_buf;
|
|
struct sctp_af *af;
|
|
struct sctp_sockaddr_entry *saddr;
|
|
int i;
|
|
int retval = 0;
|
|
int stored = 0;
|
|
|
|
chunk = NULL;
|
|
sp = sctp_sk(sk);
|
|
ep = sp->ep;
|
|
|
|
if (!ep->asconf_enable)
|
|
return retval;
|
|
|
|
pr_debug("%s: sk:%p, addrs:%p, addrcnt:%d\n",
|
|
__func__, sk, addrs, addrcnt);
|
|
|
|
list_for_each_entry(asoc, &ep->asocs, asocs) {
|
|
|
|
if (!asoc->peer.asconf_capable)
|
|
continue;
|
|
|
|
if (asoc->peer.addip_disabled_mask & SCTP_PARAM_DEL_IP)
|
|
continue;
|
|
|
|
if (!sctp_state(asoc, ESTABLISHED))
|
|
continue;
|
|
|
|
/* Check if any address in the packed array of addresses is
|
|
* not present in the bind address list of the association.
|
|
* If so, do not send the asconf chunk to its peer, but
|
|
* continue with other associations.
|
|
*/
|
|
addr_buf = addrs;
|
|
for (i = 0; i < addrcnt; i++) {
|
|
laddr = addr_buf;
|
|
af = sctp_get_af_specific(laddr->v4.sin_family);
|
|
if (!af) {
|
|
retval = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (!sctp_assoc_lookup_laddr(asoc, laddr))
|
|
break;
|
|
|
|
addr_buf += af->sockaddr_len;
|
|
}
|
|
if (i < addrcnt)
|
|
continue;
|
|
|
|
/* Find one address in the association's bind address list
|
|
* that is not in the packed array of addresses. This is to
|
|
* make sure that we do not delete all the addresses in the
|
|
* association.
|
|
*/
|
|
bp = &asoc->base.bind_addr;
|
|
laddr = sctp_find_unmatch_addr(bp, (union sctp_addr *)addrs,
|
|
addrcnt, sp);
|
|
if ((laddr == NULL) && (addrcnt == 1)) {
|
|
if (asoc->asconf_addr_del_pending)
|
|
continue;
|
|
asoc->asconf_addr_del_pending =
|
|
kzalloc(sizeof(union sctp_addr), GFP_ATOMIC);
|
|
if (asoc->asconf_addr_del_pending == NULL) {
|
|
retval = -ENOMEM;
|
|
goto out;
|
|
}
|
|
asoc->asconf_addr_del_pending->sa.sa_family =
|
|
addrs->sa_family;
|
|
asoc->asconf_addr_del_pending->v4.sin_port =
|
|
htons(bp->port);
|
|
if (addrs->sa_family == AF_INET) {
|
|
struct sockaddr_in *sin;
|
|
|
|
sin = (struct sockaddr_in *)addrs;
|
|
asoc->asconf_addr_del_pending->v4.sin_addr.s_addr = sin->sin_addr.s_addr;
|
|
} else if (addrs->sa_family == AF_INET6) {
|
|
struct sockaddr_in6 *sin6;
|
|
|
|
sin6 = (struct sockaddr_in6 *)addrs;
|
|
asoc->asconf_addr_del_pending->v6.sin6_addr = sin6->sin6_addr;
|
|
}
|
|
|
|
pr_debug("%s: keep the last address asoc:%p %pISc at %p\n",
|
|
__func__, asoc, &asoc->asconf_addr_del_pending->sa,
|
|
asoc->asconf_addr_del_pending);
|
|
|
|
asoc->src_out_of_asoc_ok = 1;
|
|
stored = 1;
|
|
goto skip_mkasconf;
|
|
}
|
|
|
|
if (laddr == NULL)
|
|
return -EINVAL;
|
|
|
|
/* We do not need RCU protection throughout this loop
|
|
* because this is done under a socket lock from the
|
|
* setsockopt call.
|
|
*/
|
|
chunk = sctp_make_asconf_update_ip(asoc, laddr, addrs, addrcnt,
|
|
SCTP_PARAM_DEL_IP);
|
|
if (!chunk) {
|
|
retval = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
skip_mkasconf:
|
|
/* Reset use_as_src flag for the addresses in the bind address
|
|
* list that are to be deleted.
|
|
*/
|
|
addr_buf = addrs;
|
|
for (i = 0; i < addrcnt; i++) {
|
|
laddr = addr_buf;
|
|
af = sctp_get_af_specific(laddr->v4.sin_family);
|
|
list_for_each_entry(saddr, &bp->address_list, list) {
|
|
if (sctp_cmp_addr_exact(&saddr->a, laddr))
|
|
saddr->state = SCTP_ADDR_DEL;
|
|
}
|
|
addr_buf += af->sockaddr_len;
|
|
}
|
|
|
|
/* Update the route and saddr entries for all the transports
|
|
* as some of the addresses in the bind address list are
|
|
* about to be deleted and cannot be used as source addresses.
|
|
*/
|
|
list_for_each_entry(transport, &asoc->peer.transport_addr_list,
|
|
transports) {
|
|
sctp_transport_route(transport, NULL,
|
|
sctp_sk(asoc->base.sk));
|
|
}
|
|
|
|
if (stored)
|
|
/* We don't need to transmit ASCONF */
|
|
continue;
|
|
retval = sctp_send_asconf(asoc, chunk);
|
|
}
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
/* set addr events to assocs in the endpoint. ep and addr_wq must be locked */
|
|
int sctp_asconf_mgmt(struct sctp_sock *sp, struct sctp_sockaddr_entry *addrw)
|
|
{
|
|
struct sock *sk = sctp_opt2sk(sp);
|
|
union sctp_addr *addr;
|
|
struct sctp_af *af;
|
|
|
|
/* It is safe to write port space in caller. */
|
|
addr = &addrw->a;
|
|
addr->v4.sin_port = htons(sp->ep->base.bind_addr.port);
|
|
af = sctp_get_af_specific(addr->sa.sa_family);
|
|
if (!af)
|
|
return -EINVAL;
|
|
if (sctp_verify_addr(sk, addr, af->sockaddr_len))
|
|
return -EINVAL;
|
|
|
|
if (addrw->state == SCTP_ADDR_NEW)
|
|
return sctp_send_asconf_add_ip(sk, (struct sockaddr *)addr, 1);
|
|
else
|
|
return sctp_send_asconf_del_ip(sk, (struct sockaddr *)addr, 1);
|
|
}
|
|
|
|
/* Helper for tunneling sctp_bindx() requests through sctp_setsockopt()
|
|
*
|
|
* API 8.1
|
|
* int sctp_bindx(int sd, struct sockaddr *addrs, int addrcnt,
|
|
* int flags);
|
|
*
|
|
* If sd is an IPv4 socket, the addresses passed must be IPv4 addresses.
|
|
* If the sd is an IPv6 socket, the addresses passed can either be IPv4
|
|
* or IPv6 addresses.
|
|
*
|
|
* A single address may be specified as INADDR_ANY or IN6ADDR_ANY, see
|
|
* Section 3.1.2 for this usage.
|
|
*
|
|
* addrs is a pointer to an array of one or more socket addresses. Each
|
|
* address is contained in its appropriate structure (i.e. struct
|
|
* sockaddr_in or struct sockaddr_in6) the family of the address type
|
|
* must be used to distinguish the address length (note that this
|
|
* representation is termed a "packed array" of addresses). The caller
|
|
* specifies the number of addresses in the array with addrcnt.
|
|
*
|
|
* On success, sctp_bindx() returns 0. On failure, sctp_bindx() returns
|
|
* -1, and sets errno to the appropriate error code.
|
|
*
|
|
* For SCTP, the port given in each socket address must be the same, or
|
|
* sctp_bindx() will fail, setting errno to EINVAL.
|
|
*
|
|
* The flags parameter is formed from the bitwise OR of zero or more of
|
|
* the following currently defined flags:
|
|
*
|
|
* SCTP_BINDX_ADD_ADDR
|
|
*
|
|
* SCTP_BINDX_REM_ADDR
|
|
*
|
|
* SCTP_BINDX_ADD_ADDR directs SCTP to add the given addresses to the
|
|
* association, and SCTP_BINDX_REM_ADDR directs SCTP to remove the given
|
|
* addresses from the association. The two flags are mutually exclusive;
|
|
* if both are given, sctp_bindx() will fail with EINVAL. A caller may
|
|
* not remove all addresses from an association; sctp_bindx() will
|
|
* reject such an attempt with EINVAL.
|
|
*
|
|
* An application can use sctp_bindx(SCTP_BINDX_ADD_ADDR) to associate
|
|
* additional addresses with an endpoint after calling bind(). Or use
|
|
* sctp_bindx(SCTP_BINDX_REM_ADDR) to remove some addresses a listening
|
|
* socket is associated with so that no new association accepted will be
|
|
* associated with those addresses. If the endpoint supports dynamic
|
|
* address a SCTP_BINDX_REM_ADDR or SCTP_BINDX_ADD_ADDR may cause a
|
|
* endpoint to send the appropriate message to the peer to change the
|
|
* peers address lists.
|
|
*
|
|
* Adding and removing addresses from a connected association is
|
|
* optional functionality. Implementations that do not support this
|
|
* functionality should return EOPNOTSUPP.
|
|
*
|
|
* Basically do nothing but copying the addresses from user to kernel
|
|
* land and invoking either sctp_bindx_add() or sctp_bindx_rem() on the sk.
|
|
* This is used for tunneling the sctp_bindx() request through sctp_setsockopt()
|
|
* from userspace.
|
|
*
|
|
* On exit there is no need to do sockfd_put(), sys_setsockopt() does
|
|
* it.
|
|
*
|
|
* sk The sk of the socket
|
|
* addrs The pointer to the addresses
|
|
* addrssize Size of the addrs buffer
|
|
* op Operation to perform (add or remove, see the flags of
|
|
* sctp_bindx)
|
|
*
|
|
* Returns 0 if ok, <0 errno code on error.
|
|
*/
|
|
static int sctp_setsockopt_bindx(struct sock *sk, struct sockaddr *addrs,
|
|
int addrs_size, int op)
|
|
{
|
|
int err;
|
|
int addrcnt = 0;
|
|
int walk_size = 0;
|
|
struct sockaddr *sa_addr;
|
|
void *addr_buf = addrs;
|
|
struct sctp_af *af;
|
|
|
|
pr_debug("%s: sk:%p addrs:%p addrs_size:%d opt:%d\n",
|
|
__func__, sk, addr_buf, addrs_size, op);
|
|
|
|
if (unlikely(addrs_size <= 0))
|
|
return -EINVAL;
|
|
|
|
/* Walk through the addrs buffer and count the number of addresses. */
|
|
while (walk_size < addrs_size) {
|
|
if (walk_size + sizeof(sa_family_t) > addrs_size)
|
|
return -EINVAL;
|
|
|
|
sa_addr = addr_buf;
|
|
af = sctp_get_af_specific(sa_addr->sa_family);
|
|
|
|
/* If the address family is not supported or if this address
|
|
* causes the address buffer to overflow return EINVAL.
|
|
*/
|
|
if (!af || (walk_size + af->sockaddr_len) > addrs_size)
|
|
return -EINVAL;
|
|
addrcnt++;
|
|
addr_buf += af->sockaddr_len;
|
|
walk_size += af->sockaddr_len;
|
|
}
|
|
|
|
/* Do the work. */
|
|
switch (op) {
|
|
case SCTP_BINDX_ADD_ADDR:
|
|
/* Allow security module to validate bindx addresses. */
|
|
err = security_sctp_bind_connect(sk, SCTP_SOCKOPT_BINDX_ADD,
|
|
addrs, addrs_size);
|
|
if (err)
|
|
return err;
|
|
err = sctp_bindx_add(sk, addrs, addrcnt);
|
|
if (err)
|
|
return err;
|
|
return sctp_send_asconf_add_ip(sk, addrs, addrcnt);
|
|
case SCTP_BINDX_REM_ADDR:
|
|
err = sctp_bindx_rem(sk, addrs, addrcnt);
|
|
if (err)
|
|
return err;
|
|
return sctp_send_asconf_del_ip(sk, addrs, addrcnt);
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static int sctp_bind_add(struct sock *sk, struct sockaddr *addrs,
|
|
int addrlen)
|
|
{
|
|
int err;
|
|
|
|
lock_sock(sk);
|
|
err = sctp_setsockopt_bindx(sk, addrs, addrlen, SCTP_BINDX_ADD_ADDR);
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
|
|
static int sctp_connect_new_asoc(struct sctp_endpoint *ep,
|
|
const union sctp_addr *daddr,
|
|
const struct sctp_initmsg *init,
|
|
struct sctp_transport **tp)
|
|
{
|
|
struct sctp_association *asoc;
|
|
struct sock *sk = ep->base.sk;
|
|
struct net *net = sock_net(sk);
|
|
enum sctp_scope scope;
|
|
int err;
|
|
|
|
if (sctp_endpoint_is_peeled_off(ep, daddr))
|
|
return -EADDRNOTAVAIL;
|
|
|
|
if (!ep->base.bind_addr.port) {
|
|
if (sctp_autobind(sk))
|
|
return -EAGAIN;
|
|
} else {
|
|
if (inet_port_requires_bind_service(net, ep->base.bind_addr.port) &&
|
|
!ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
|
|
return -EACCES;
|
|
}
|
|
|
|
scope = sctp_scope(daddr);
|
|
asoc = sctp_association_new(ep, sk, scope, GFP_KERNEL);
|
|
if (!asoc)
|
|
return -ENOMEM;
|
|
|
|
err = sctp_assoc_set_bind_addr_from_ep(asoc, scope, GFP_KERNEL);
|
|
if (err < 0)
|
|
goto free;
|
|
|
|
*tp = sctp_assoc_add_peer(asoc, daddr, GFP_KERNEL, SCTP_UNKNOWN);
|
|
if (!*tp) {
|
|
err = -ENOMEM;
|
|
goto free;
|
|
}
|
|
|
|
if (!init)
|
|
return 0;
|
|
|
|
if (init->sinit_num_ostreams) {
|
|
__u16 outcnt = init->sinit_num_ostreams;
|
|
|
|
asoc->c.sinit_num_ostreams = outcnt;
|
|
/* outcnt has been changed, need to re-init stream */
|
|
err = sctp_stream_init(&asoc->stream, outcnt, 0, GFP_KERNEL);
|
|
if (err)
|
|
goto free;
|
|
}
|
|
|
|
if (init->sinit_max_instreams)
|
|
asoc->c.sinit_max_instreams = init->sinit_max_instreams;
|
|
|
|
if (init->sinit_max_attempts)
|
|
asoc->max_init_attempts = init->sinit_max_attempts;
|
|
|
|
if (init->sinit_max_init_timeo)
|
|
asoc->max_init_timeo =
|
|
msecs_to_jiffies(init->sinit_max_init_timeo);
|
|
|
|
return 0;
|
|
free:
|
|
sctp_association_free(asoc);
|
|
return err;
|
|
}
|
|
|
|
static int sctp_connect_add_peer(struct sctp_association *asoc,
|
|
union sctp_addr *daddr, int addr_len)
|
|
{
|
|
struct sctp_endpoint *ep = asoc->ep;
|
|
struct sctp_association *old;
|
|
struct sctp_transport *t;
|
|
int err;
|
|
|
|
err = sctp_verify_addr(ep->base.sk, daddr, addr_len);
|
|
if (err)
|
|
return err;
|
|
|
|
old = sctp_endpoint_lookup_assoc(ep, daddr, &t);
|
|
if (old && old != asoc)
|
|
return old->state >= SCTP_STATE_ESTABLISHED ? -EISCONN
|
|
: -EALREADY;
|
|
|
|
if (sctp_endpoint_is_peeled_off(ep, daddr))
|
|
return -EADDRNOTAVAIL;
|
|
|
|
t = sctp_assoc_add_peer(asoc, daddr, GFP_KERNEL, SCTP_UNKNOWN);
|
|
if (!t)
|
|
return -ENOMEM;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* __sctp_connect(struct sock* sk, struct sockaddr *kaddrs, int addrs_size)
|
|
*
|
|
* Common routine for handling connect() and sctp_connectx().
|
|
* Connect will come in with just a single address.
|
|
*/
|
|
static int __sctp_connect(struct sock *sk, struct sockaddr *kaddrs,
|
|
int addrs_size, int flags, sctp_assoc_t *assoc_id)
|
|
{
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
struct sctp_endpoint *ep = sp->ep;
|
|
struct sctp_transport *transport;
|
|
struct sctp_association *asoc;
|
|
void *addr_buf = kaddrs;
|
|
union sctp_addr *daddr;
|
|
struct sctp_af *af;
|
|
int walk_size, err;
|
|
long timeo;
|
|
|
|
if (sctp_sstate(sk, ESTABLISHED) || sctp_sstate(sk, CLOSING) ||
|
|
(sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING)))
|
|
return -EISCONN;
|
|
|
|
daddr = addr_buf;
|
|
af = sctp_get_af_specific(daddr->sa.sa_family);
|
|
if (!af || af->sockaddr_len > addrs_size)
|
|
return -EINVAL;
|
|
|
|
err = sctp_verify_addr(sk, daddr, af->sockaddr_len);
|
|
if (err)
|
|
return err;
|
|
|
|
asoc = sctp_endpoint_lookup_assoc(ep, daddr, &transport);
|
|
if (asoc)
|
|
return asoc->state >= SCTP_STATE_ESTABLISHED ? -EISCONN
|
|
: -EALREADY;
|
|
|
|
err = sctp_connect_new_asoc(ep, daddr, NULL, &transport);
|
|
if (err)
|
|
return err;
|
|
asoc = transport->asoc;
|
|
|
|
addr_buf += af->sockaddr_len;
|
|
walk_size = af->sockaddr_len;
|
|
while (walk_size < addrs_size) {
|
|
err = -EINVAL;
|
|
if (walk_size + sizeof(sa_family_t) > addrs_size)
|
|
goto out_free;
|
|
|
|
daddr = addr_buf;
|
|
af = sctp_get_af_specific(daddr->sa.sa_family);
|
|
if (!af || af->sockaddr_len + walk_size > addrs_size)
|
|
goto out_free;
|
|
|
|
if (asoc->peer.port != ntohs(daddr->v4.sin_port))
|
|
goto out_free;
|
|
|
|
err = sctp_connect_add_peer(asoc, daddr, af->sockaddr_len);
|
|
if (err)
|
|
goto out_free;
|
|
|
|
addr_buf += af->sockaddr_len;
|
|
walk_size += af->sockaddr_len;
|
|
}
|
|
|
|
/* In case the user of sctp_connectx() wants an association
|
|
* id back, assign one now.
|
|
*/
|
|
if (assoc_id) {
|
|
err = sctp_assoc_set_id(asoc, GFP_KERNEL);
|
|
if (err < 0)
|
|
goto out_free;
|
|
}
|
|
|
|
err = sctp_primitive_ASSOCIATE(sock_net(sk), asoc, NULL);
|
|
if (err < 0)
|
|
goto out_free;
|
|
|
|
/* Initialize sk's dport and daddr for getpeername() */
|
|
inet_sk(sk)->inet_dport = htons(asoc->peer.port);
|
|
sp->pf->to_sk_daddr(daddr, sk);
|
|
sk->sk_err = 0;
|
|
|
|
if (assoc_id)
|
|
*assoc_id = asoc->assoc_id;
|
|
|
|
timeo = sock_sndtimeo(sk, flags & O_NONBLOCK);
|
|
return sctp_wait_for_connect(asoc, &timeo);
|
|
|
|
out_free:
|
|
pr_debug("%s: took out_free path with asoc:%p kaddrs:%p err:%d\n",
|
|
__func__, asoc, kaddrs, err);
|
|
sctp_association_free(asoc);
|
|
return err;
|
|
}
|
|
|
|
/* Helper for tunneling sctp_connectx() requests through sctp_setsockopt()
|
|
*
|
|
* API 8.9
|
|
* int sctp_connectx(int sd, struct sockaddr *addrs, int addrcnt,
|
|
* sctp_assoc_t *asoc);
|
|
*
|
|
* If sd is an IPv4 socket, the addresses passed must be IPv4 addresses.
|
|
* If the sd is an IPv6 socket, the addresses passed can either be IPv4
|
|
* or IPv6 addresses.
|
|
*
|
|
* A single address may be specified as INADDR_ANY or IN6ADDR_ANY, see
|
|
* Section 3.1.2 for this usage.
|
|
*
|
|
* addrs is a pointer to an array of one or more socket addresses. Each
|
|
* address is contained in its appropriate structure (i.e. struct
|
|
* sockaddr_in or struct sockaddr_in6) the family of the address type
|
|
* must be used to distengish the address length (note that this
|
|
* representation is termed a "packed array" of addresses). The caller
|
|
* specifies the number of addresses in the array with addrcnt.
|
|
*
|
|
* On success, sctp_connectx() returns 0. It also sets the assoc_id to
|
|
* the association id of the new association. On failure, sctp_connectx()
|
|
* returns -1, and sets errno to the appropriate error code. The assoc_id
|
|
* is not touched by the kernel.
|
|
*
|
|
* For SCTP, the port given in each socket address must be the same, or
|
|
* sctp_connectx() will fail, setting errno to EINVAL.
|
|
*
|
|
* An application can use sctp_connectx to initiate an association with
|
|
* an endpoint that is multi-homed. Much like sctp_bindx() this call
|
|
* allows a caller to specify multiple addresses at which a peer can be
|
|
* reached. The way the SCTP stack uses the list of addresses to set up
|
|
* the association is implementation dependent. This function only
|
|
* specifies that the stack will try to make use of all the addresses in
|
|
* the list when needed.
|
|
*
|
|
* Note that the list of addresses passed in is only used for setting up
|
|
* the association. It does not necessarily equal the set of addresses
|
|
* the peer uses for the resulting association. If the caller wants to
|
|
* find out the set of peer addresses, it must use sctp_getpaddrs() to
|
|
* retrieve them after the association has been set up.
|
|
*
|
|
* Basically do nothing but copying the addresses from user to kernel
|
|
* land and invoking either sctp_connectx(). This is used for tunneling
|
|
* the sctp_connectx() request through sctp_setsockopt() from userspace.
|
|
*
|
|
* On exit there is no need to do sockfd_put(), sys_setsockopt() does
|
|
* it.
|
|
*
|
|
* sk The sk of the socket
|
|
* addrs The pointer to the addresses
|
|
* addrssize Size of the addrs buffer
|
|
*
|
|
* Returns >=0 if ok, <0 errno code on error.
|
|
*/
|
|
static int __sctp_setsockopt_connectx(struct sock *sk, struct sockaddr *kaddrs,
|
|
int addrs_size, sctp_assoc_t *assoc_id)
|
|
{
|
|
int err = 0, flags = 0;
|
|
|
|
pr_debug("%s: sk:%p addrs:%p addrs_size:%d\n",
|
|
__func__, sk, kaddrs, addrs_size);
|
|
|
|
/* make sure the 1st addr's sa_family is accessible later */
|
|
if (unlikely(addrs_size < sizeof(sa_family_t)))
|
|
return -EINVAL;
|
|
|
|
/* Allow security module to validate connectx addresses. */
|
|
err = security_sctp_bind_connect(sk, SCTP_SOCKOPT_CONNECTX,
|
|
(struct sockaddr *)kaddrs,
|
|
addrs_size);
|
|
if (err)
|
|
return err;
|
|
|
|
/* in-kernel sockets don't generally have a file allocated to them
|
|
* if all they do is call sock_create_kern().
|
|
*/
|
|
if (sk->sk_socket->file)
|
|
flags = sk->sk_socket->file->f_flags;
|
|
|
|
return __sctp_connect(sk, kaddrs, addrs_size, flags, assoc_id);
|
|
}
|
|
|
|
/*
|
|
* This is an older interface. It's kept for backward compatibility
|
|
* to the option that doesn't provide association id.
|
|
*/
|
|
static int sctp_setsockopt_connectx_old(struct sock *sk,
|
|
struct sockaddr *kaddrs,
|
|
int addrs_size)
|
|
{
|
|
return __sctp_setsockopt_connectx(sk, kaddrs, addrs_size, NULL);
|
|
}
|
|
|
|
/*
|
|
* New interface for the API. The since the API is done with a socket
|
|
* option, to make it simple we feed back the association id is as a return
|
|
* indication to the call. Error is always negative and association id is
|
|
* always positive.
|
|
*/
|
|
static int sctp_setsockopt_connectx(struct sock *sk,
|
|
struct sockaddr *kaddrs,
|
|
int addrs_size)
|
|
{
|
|
sctp_assoc_t assoc_id = 0;
|
|
int err = 0;
|
|
|
|
err = __sctp_setsockopt_connectx(sk, kaddrs, addrs_size, &assoc_id);
|
|
|
|
if (err)
|
|
return err;
|
|
else
|
|
return assoc_id;
|
|
}
|
|
|
|
/*
|
|
* New (hopefully final) interface for the API.
|
|
* We use the sctp_getaddrs_old structure so that use-space library
|
|
* can avoid any unnecessary allocations. The only different part
|
|
* is that we store the actual length of the address buffer into the
|
|
* addrs_num structure member. That way we can re-use the existing
|
|
* code.
|
|
*/
|
|
#ifdef CONFIG_COMPAT
|
|
struct compat_sctp_getaddrs_old {
|
|
sctp_assoc_t assoc_id;
|
|
s32 addr_num;
|
|
compat_uptr_t addrs; /* struct sockaddr * */
|
|
};
|
|
#endif
|
|
|
|
static int sctp_getsockopt_connectx3(struct sock *sk, int len,
|
|
char __user *optval,
|
|
int __user *optlen)
|
|
{
|
|
struct sctp_getaddrs_old param;
|
|
sctp_assoc_t assoc_id = 0;
|
|
struct sockaddr *kaddrs;
|
|
int err = 0;
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
if (in_compat_syscall()) {
|
|
struct compat_sctp_getaddrs_old param32;
|
|
|
|
if (len < sizeof(param32))
|
|
return -EINVAL;
|
|
if (copy_from_user(¶m32, optval, sizeof(param32)))
|
|
return -EFAULT;
|
|
|
|
param.assoc_id = param32.assoc_id;
|
|
param.addr_num = param32.addr_num;
|
|
param.addrs = compat_ptr(param32.addrs);
|
|
} else
|
|
#endif
|
|
{
|
|
if (len < sizeof(param))
|
|
return -EINVAL;
|
|
if (copy_from_user(¶m, optval, sizeof(param)))
|
|
return -EFAULT;
|
|
}
|
|
|
|
kaddrs = memdup_user(param.addrs, param.addr_num);
|
|
if (IS_ERR(kaddrs))
|
|
return PTR_ERR(kaddrs);
|
|
|
|
err = __sctp_setsockopt_connectx(sk, kaddrs, param.addr_num, &assoc_id);
|
|
kfree(kaddrs);
|
|
if (err == 0 || err == -EINPROGRESS) {
|
|
if (copy_to_user(optval, &assoc_id, sizeof(assoc_id)))
|
|
return -EFAULT;
|
|
if (put_user(sizeof(assoc_id), optlen))
|
|
return -EFAULT;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
/* API 3.1.4 close() - UDP Style Syntax
|
|
* Applications use close() to perform graceful shutdown (as described in
|
|
* Section 10.1 of [SCTP]) on ALL the associations currently represented
|
|
* by a UDP-style socket.
|
|
*
|
|
* The syntax is
|
|
*
|
|
* ret = close(int sd);
|
|
*
|
|
* sd - the socket descriptor of the associations to be closed.
|
|
*
|
|
* To gracefully shutdown a specific association represented by the
|
|
* UDP-style socket, an application should use the sendmsg() call,
|
|
* passing no user data, but including the appropriate flag in the
|
|
* ancillary data (see Section xxxx).
|
|
*
|
|
* If sd in the close() call is a branched-off socket representing only
|
|
* one association, the shutdown is performed on that association only.
|
|
*
|
|
* 4.1.6 close() - TCP Style Syntax
|
|
*
|
|
* Applications use close() to gracefully close down an association.
|
|
*
|
|
* The syntax is:
|
|
*
|
|
* int close(int sd);
|
|
*
|
|
* sd - the socket descriptor of the association to be closed.
|
|
*
|
|
* After an application calls close() on a socket descriptor, no further
|
|
* socket operations will succeed on that descriptor.
|
|
*
|
|
* API 7.1.4 SO_LINGER
|
|
*
|
|
* An application using the TCP-style socket can use this option to
|
|
* perform the SCTP ABORT primitive. The linger option structure is:
|
|
*
|
|
* struct linger {
|
|
* int l_onoff; // option on/off
|
|
* int l_linger; // linger time
|
|
* };
|
|
*
|
|
* To enable the option, set l_onoff to 1. If the l_linger value is set
|
|
* to 0, calling close() is the same as the ABORT primitive. If the
|
|
* value is set to a negative value, the setsockopt() call will return
|
|
* an error. If the value is set to a positive value linger_time, the
|
|
* close() can be blocked for at most linger_time ms. If the graceful
|
|
* shutdown phase does not finish during this period, close() will
|
|
* return but the graceful shutdown phase continues in the system.
|
|
*/
|
|
static void sctp_close(struct sock *sk, long timeout)
|
|
{
|
|
struct net *net = sock_net(sk);
|
|
struct sctp_endpoint *ep;
|
|
struct sctp_association *asoc;
|
|
struct list_head *pos, *temp;
|
|
unsigned int data_was_unread;
|
|
|
|
pr_debug("%s: sk:%p, timeout:%ld\n", __func__, sk, timeout);
|
|
|
|
lock_sock_nested(sk, SINGLE_DEPTH_NESTING);
|
|
sk->sk_shutdown = SHUTDOWN_MASK;
|
|
inet_sk_set_state(sk, SCTP_SS_CLOSING);
|
|
|
|
ep = sctp_sk(sk)->ep;
|
|
|
|
/* Clean up any skbs sitting on the receive queue. */
|
|
data_was_unread = sctp_queue_purge_ulpevents(&sk->sk_receive_queue);
|
|
data_was_unread += sctp_queue_purge_ulpevents(&sctp_sk(sk)->pd_lobby);
|
|
|
|
/* Walk all associations on an endpoint. */
|
|
list_for_each_safe(pos, temp, &ep->asocs) {
|
|
asoc = list_entry(pos, struct sctp_association, asocs);
|
|
|
|
if (sctp_style(sk, TCP)) {
|
|
/* A closed association can still be in the list if
|
|
* it belongs to a TCP-style listening socket that is
|
|
* not yet accepted. If so, free it. If not, send an
|
|
* ABORT or SHUTDOWN based on the linger options.
|
|
*/
|
|
if (sctp_state(asoc, CLOSED)) {
|
|
sctp_association_free(asoc);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (data_was_unread || !skb_queue_empty(&asoc->ulpq.lobby) ||
|
|
!skb_queue_empty(&asoc->ulpq.reasm) ||
|
|
!skb_queue_empty(&asoc->ulpq.reasm_uo) ||
|
|
(sock_flag(sk, SOCK_LINGER) && !sk->sk_lingertime)) {
|
|
struct sctp_chunk *chunk;
|
|
|
|
chunk = sctp_make_abort_user(asoc, NULL, 0);
|
|
sctp_primitive_ABORT(net, asoc, chunk);
|
|
} else
|
|
sctp_primitive_SHUTDOWN(net, asoc, NULL);
|
|
}
|
|
|
|
/* On a TCP-style socket, block for at most linger_time if set. */
|
|
if (sctp_style(sk, TCP) && timeout)
|
|
sctp_wait_for_close(sk, timeout);
|
|
|
|
/* This will run the backlog queue. */
|
|
release_sock(sk);
|
|
|
|
/* Supposedly, no process has access to the socket, but
|
|
* the net layers still may.
|
|
* Also, sctp_destroy_sock() needs to be called with addr_wq_lock
|
|
* held and that should be grabbed before socket lock.
|
|
*/
|
|
spin_lock_bh(&net->sctp.addr_wq_lock);
|
|
bh_lock_sock_nested(sk);
|
|
|
|
/* Hold the sock, since sk_common_release() will put sock_put()
|
|
* and we have just a little more cleanup.
|
|
*/
|
|
sock_hold(sk);
|
|
sk_common_release(sk);
|
|
|
|
bh_unlock_sock(sk);
|
|
spin_unlock_bh(&net->sctp.addr_wq_lock);
|
|
|
|
sock_put(sk);
|
|
|
|
SCTP_DBG_OBJCNT_DEC(sock);
|
|
}
|
|
|
|
/* Handle EPIPE error. */
|
|
static int sctp_error(struct sock *sk, int flags, int err)
|
|
{
|
|
if (err == -EPIPE)
|
|
err = sock_error(sk) ? : -EPIPE;
|
|
if (err == -EPIPE && !(flags & MSG_NOSIGNAL))
|
|
send_sig(SIGPIPE, current, 0);
|
|
return err;
|
|
}
|
|
|
|
/* API 3.1.3 sendmsg() - UDP Style Syntax
|
|
*
|
|
* An application uses sendmsg() and recvmsg() calls to transmit data to
|
|
* and receive data from its peer.
|
|
*
|
|
* ssize_t sendmsg(int socket, const struct msghdr *message,
|
|
* int flags);
|
|
*
|
|
* socket - the socket descriptor of the endpoint.
|
|
* message - pointer to the msghdr structure which contains a single
|
|
* user message and possibly some ancillary data.
|
|
*
|
|
* See Section 5 for complete description of the data
|
|
* structures.
|
|
*
|
|
* flags - flags sent or received with the user message, see Section
|
|
* 5 for complete description of the flags.
|
|
*
|
|
* Note: This function could use a rewrite especially when explicit
|
|
* connect support comes in.
|
|
*/
|
|
/* BUG: We do not implement the equivalent of sk_stream_wait_memory(). */
|
|
|
|
static int sctp_msghdr_parse(const struct msghdr *msg,
|
|
struct sctp_cmsgs *cmsgs);
|
|
|
|
static int sctp_sendmsg_parse(struct sock *sk, struct sctp_cmsgs *cmsgs,
|
|
struct sctp_sndrcvinfo *srinfo,
|
|
const struct msghdr *msg, size_t msg_len)
|
|
{
|
|
__u16 sflags;
|
|
int err;
|
|
|
|
if (sctp_sstate(sk, LISTENING) && sctp_style(sk, TCP))
|
|
return -EPIPE;
|
|
|
|
if (msg_len > sk->sk_sndbuf)
|
|
return -EMSGSIZE;
|
|
|
|
memset(cmsgs, 0, sizeof(*cmsgs));
|
|
err = sctp_msghdr_parse(msg, cmsgs);
|
|
if (err) {
|
|
pr_debug("%s: msghdr parse err:%x\n", __func__, err);
|
|
return err;
|
|
}
|
|
|
|
memset(srinfo, 0, sizeof(*srinfo));
|
|
if (cmsgs->srinfo) {
|
|
srinfo->sinfo_stream = cmsgs->srinfo->sinfo_stream;
|
|
srinfo->sinfo_flags = cmsgs->srinfo->sinfo_flags;
|
|
srinfo->sinfo_ppid = cmsgs->srinfo->sinfo_ppid;
|
|
srinfo->sinfo_context = cmsgs->srinfo->sinfo_context;
|
|
srinfo->sinfo_assoc_id = cmsgs->srinfo->sinfo_assoc_id;
|
|
srinfo->sinfo_timetolive = cmsgs->srinfo->sinfo_timetolive;
|
|
}
|
|
|
|
if (cmsgs->sinfo) {
|
|
srinfo->sinfo_stream = cmsgs->sinfo->snd_sid;
|
|
srinfo->sinfo_flags = cmsgs->sinfo->snd_flags;
|
|
srinfo->sinfo_ppid = cmsgs->sinfo->snd_ppid;
|
|
srinfo->sinfo_context = cmsgs->sinfo->snd_context;
|
|
srinfo->sinfo_assoc_id = cmsgs->sinfo->snd_assoc_id;
|
|
}
|
|
|
|
if (cmsgs->prinfo) {
|
|
srinfo->sinfo_timetolive = cmsgs->prinfo->pr_value;
|
|
SCTP_PR_SET_POLICY(srinfo->sinfo_flags,
|
|
cmsgs->prinfo->pr_policy);
|
|
}
|
|
|
|
sflags = srinfo->sinfo_flags;
|
|
if (!sflags && msg_len)
|
|
return 0;
|
|
|
|
if (sctp_style(sk, TCP) && (sflags & (SCTP_EOF | SCTP_ABORT)))
|
|
return -EINVAL;
|
|
|
|
if (((sflags & SCTP_EOF) && msg_len > 0) ||
|
|
(!(sflags & (SCTP_EOF | SCTP_ABORT)) && msg_len == 0))
|
|
return -EINVAL;
|
|
|
|
if ((sflags & SCTP_ADDR_OVER) && !msg->msg_name)
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sctp_sendmsg_new_asoc(struct sock *sk, __u16 sflags,
|
|
struct sctp_cmsgs *cmsgs,
|
|
union sctp_addr *daddr,
|
|
struct sctp_transport **tp)
|
|
{
|
|
struct sctp_endpoint *ep = sctp_sk(sk)->ep;
|
|
struct sctp_association *asoc;
|
|
struct cmsghdr *cmsg;
|
|
__be32 flowinfo = 0;
|
|
struct sctp_af *af;
|
|
int err;
|
|
|
|
*tp = NULL;
|
|
|
|
if (sflags & (SCTP_EOF | SCTP_ABORT))
|
|
return -EINVAL;
|
|
|
|
if (sctp_style(sk, TCP) && (sctp_sstate(sk, ESTABLISHED) ||
|
|
sctp_sstate(sk, CLOSING)))
|
|
return -EADDRNOTAVAIL;
|
|
|
|
/* Label connection socket for first association 1-to-many
|
|
* style for client sequence socket()->sendmsg(). This
|
|
* needs to be done before sctp_assoc_add_peer() as that will
|
|
* set up the initial packet that needs to account for any
|
|
* security ip options (CIPSO/CALIPSO) added to the packet.
|
|
*/
|
|
af = sctp_get_af_specific(daddr->sa.sa_family);
|
|
if (!af)
|
|
return -EINVAL;
|
|
err = security_sctp_bind_connect(sk, SCTP_SENDMSG_CONNECT,
|
|
(struct sockaddr *)daddr,
|
|
af->sockaddr_len);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = sctp_connect_new_asoc(ep, daddr, cmsgs->init, tp);
|
|
if (err)
|
|
return err;
|
|
asoc = (*tp)->asoc;
|
|
|
|
if (!cmsgs->addrs_msg)
|
|
return 0;
|
|
|
|
if (daddr->sa.sa_family == AF_INET6)
|
|
flowinfo = daddr->v6.sin6_flowinfo;
|
|
|
|
/* sendv addr list parse */
|
|
for_each_cmsghdr(cmsg, cmsgs->addrs_msg) {
|
|
union sctp_addr _daddr;
|
|
int dlen;
|
|
|
|
if (cmsg->cmsg_level != IPPROTO_SCTP ||
|
|
(cmsg->cmsg_type != SCTP_DSTADDRV4 &&
|
|
cmsg->cmsg_type != SCTP_DSTADDRV6))
|
|
continue;
|
|
|
|
daddr = &_daddr;
|
|
memset(daddr, 0, sizeof(*daddr));
|
|
dlen = cmsg->cmsg_len - sizeof(struct cmsghdr);
|
|
if (cmsg->cmsg_type == SCTP_DSTADDRV4) {
|
|
if (dlen < sizeof(struct in_addr)) {
|
|
err = -EINVAL;
|
|
goto free;
|
|
}
|
|
|
|
dlen = sizeof(struct in_addr);
|
|
daddr->v4.sin_family = AF_INET;
|
|
daddr->v4.sin_port = htons(asoc->peer.port);
|
|
memcpy(&daddr->v4.sin_addr, CMSG_DATA(cmsg), dlen);
|
|
} else {
|
|
if (dlen < sizeof(struct in6_addr)) {
|
|
err = -EINVAL;
|
|
goto free;
|
|
}
|
|
|
|
dlen = sizeof(struct in6_addr);
|
|
daddr->v6.sin6_flowinfo = flowinfo;
|
|
daddr->v6.sin6_family = AF_INET6;
|
|
daddr->v6.sin6_port = htons(asoc->peer.port);
|
|
memcpy(&daddr->v6.sin6_addr, CMSG_DATA(cmsg), dlen);
|
|
}
|
|
|
|
err = sctp_connect_add_peer(asoc, daddr, sizeof(*daddr));
|
|
if (err)
|
|
goto free;
|
|
}
|
|
|
|
return 0;
|
|
|
|
free:
|
|
sctp_association_free(asoc);
|
|
return err;
|
|
}
|
|
|
|
static int sctp_sendmsg_check_sflags(struct sctp_association *asoc,
|
|
__u16 sflags, struct msghdr *msg,
|
|
size_t msg_len)
|
|
{
|
|
struct sock *sk = asoc->base.sk;
|
|
struct net *net = sock_net(sk);
|
|
|
|
if (sctp_state(asoc, CLOSED) && sctp_style(sk, TCP))
|
|
return -EPIPE;
|
|
|
|
if ((sflags & SCTP_SENDALL) && sctp_style(sk, UDP) &&
|
|
!sctp_state(asoc, ESTABLISHED))
|
|
return 0;
|
|
|
|
if (sflags & SCTP_EOF) {
|
|
pr_debug("%s: shutting down association:%p\n", __func__, asoc);
|
|
sctp_primitive_SHUTDOWN(net, asoc, NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
if (sflags & SCTP_ABORT) {
|
|
struct sctp_chunk *chunk;
|
|
|
|
chunk = sctp_make_abort_user(asoc, msg, msg_len);
|
|
if (!chunk)
|
|
return -ENOMEM;
|
|
|
|
pr_debug("%s: aborting association:%p\n", __func__, asoc);
|
|
sctp_primitive_ABORT(net, asoc, chunk);
|
|
iov_iter_revert(&msg->msg_iter, msg_len);
|
|
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int sctp_sendmsg_to_asoc(struct sctp_association *asoc,
|
|
struct msghdr *msg, size_t msg_len,
|
|
struct sctp_transport *transport,
|
|
struct sctp_sndrcvinfo *sinfo)
|
|
{
|
|
struct sock *sk = asoc->base.sk;
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
struct net *net = sock_net(sk);
|
|
struct sctp_datamsg *datamsg;
|
|
bool wait_connect = false;
|
|
struct sctp_chunk *chunk;
|
|
long timeo;
|
|
int err;
|
|
|
|
if (sinfo->sinfo_stream >= asoc->stream.outcnt) {
|
|
err = -EINVAL;
|
|
goto err;
|
|
}
|
|
|
|
if (unlikely(!SCTP_SO(&asoc->stream, sinfo->sinfo_stream)->ext)) {
|
|
err = sctp_stream_init_ext(&asoc->stream, sinfo->sinfo_stream);
|
|
if (err)
|
|
goto err;
|
|
}
|
|
|
|
if (sp->disable_fragments && msg_len > asoc->frag_point) {
|
|
err = -EMSGSIZE;
|
|
goto err;
|
|
}
|
|
|
|
if (asoc->pmtu_pending) {
|
|
if (sp->param_flags & SPP_PMTUD_ENABLE)
|
|
sctp_assoc_sync_pmtu(asoc);
|
|
asoc->pmtu_pending = 0;
|
|
}
|
|
|
|
if (sctp_wspace(asoc) < (int)msg_len)
|
|
sctp_prsctp_prune(asoc, sinfo, msg_len - sctp_wspace(asoc));
|
|
|
|
if (sk_under_memory_pressure(sk))
|
|
sk_mem_reclaim(sk);
|
|
|
|
if (sctp_wspace(asoc) <= 0 || !sk_wmem_schedule(sk, msg_len)) {
|
|
timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT);
|
|
err = sctp_wait_for_sndbuf(asoc, &timeo, msg_len);
|
|
if (err)
|
|
goto err;
|
|
}
|
|
|
|
if (sctp_state(asoc, CLOSED)) {
|
|
err = sctp_primitive_ASSOCIATE(net, asoc, NULL);
|
|
if (err)
|
|
goto err;
|
|
|
|
if (asoc->ep->intl_enable) {
|
|
timeo = sock_sndtimeo(sk, 0);
|
|
err = sctp_wait_for_connect(asoc, &timeo);
|
|
if (err) {
|
|
err = -ESRCH;
|
|
goto err;
|
|
}
|
|
} else {
|
|
wait_connect = true;
|
|
}
|
|
|
|
pr_debug("%s: we associated primitively\n", __func__);
|
|
}
|
|
|
|
datamsg = sctp_datamsg_from_user(asoc, sinfo, &msg->msg_iter);
|
|
if (IS_ERR(datamsg)) {
|
|
err = PTR_ERR(datamsg);
|
|
goto err;
|
|
}
|
|
|
|
asoc->force_delay = !!(msg->msg_flags & MSG_MORE);
|
|
|
|
list_for_each_entry(chunk, &datamsg->chunks, frag_list) {
|
|
sctp_chunk_hold(chunk);
|
|
sctp_set_owner_w(chunk);
|
|
chunk->transport = transport;
|
|
}
|
|
|
|
err = sctp_primitive_SEND(net, asoc, datamsg);
|
|
if (err) {
|
|
sctp_datamsg_free(datamsg);
|
|
goto err;
|
|
}
|
|
|
|
pr_debug("%s: we sent primitively\n", __func__);
|
|
|
|
sctp_datamsg_put(datamsg);
|
|
|
|
if (unlikely(wait_connect)) {
|
|
timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT);
|
|
sctp_wait_for_connect(asoc, &timeo);
|
|
}
|
|
|
|
err = msg_len;
|
|
|
|
err:
|
|
return err;
|
|
}
|
|
|
|
static union sctp_addr *sctp_sendmsg_get_daddr(struct sock *sk,
|
|
const struct msghdr *msg,
|
|
struct sctp_cmsgs *cmsgs)
|
|
{
|
|
union sctp_addr *daddr = NULL;
|
|
int err;
|
|
|
|
if (!sctp_style(sk, UDP_HIGH_BANDWIDTH) && msg->msg_name) {
|
|
int len = msg->msg_namelen;
|
|
|
|
if (len > sizeof(*daddr))
|
|
len = sizeof(*daddr);
|
|
|
|
daddr = (union sctp_addr *)msg->msg_name;
|
|
|
|
err = sctp_verify_addr(sk, daddr, len);
|
|
if (err)
|
|
return ERR_PTR(err);
|
|
}
|
|
|
|
return daddr;
|
|
}
|
|
|
|
static void sctp_sendmsg_update_sinfo(struct sctp_association *asoc,
|
|
struct sctp_sndrcvinfo *sinfo,
|
|
struct sctp_cmsgs *cmsgs)
|
|
{
|
|
if (!cmsgs->srinfo && !cmsgs->sinfo) {
|
|
sinfo->sinfo_stream = asoc->default_stream;
|
|
sinfo->sinfo_ppid = asoc->default_ppid;
|
|
sinfo->sinfo_context = asoc->default_context;
|
|
sinfo->sinfo_assoc_id = sctp_assoc2id(asoc);
|
|
|
|
if (!cmsgs->prinfo)
|
|
sinfo->sinfo_flags = asoc->default_flags;
|
|
}
|
|
|
|
if (!cmsgs->srinfo && !cmsgs->prinfo)
|
|
sinfo->sinfo_timetolive = asoc->default_timetolive;
|
|
|
|
if (cmsgs->authinfo) {
|
|
/* Reuse sinfo_tsn to indicate that authinfo was set and
|
|
* sinfo_ssn to save the keyid on tx path.
|
|
*/
|
|
sinfo->sinfo_tsn = 1;
|
|
sinfo->sinfo_ssn = cmsgs->authinfo->auth_keynumber;
|
|
}
|
|
}
|
|
|
|
static int sctp_sendmsg(struct sock *sk, struct msghdr *msg, size_t msg_len)
|
|
{
|
|
struct sctp_endpoint *ep = sctp_sk(sk)->ep;
|
|
struct sctp_transport *transport = NULL;
|
|
struct sctp_sndrcvinfo _sinfo, *sinfo;
|
|
struct sctp_association *asoc, *tmp;
|
|
struct sctp_cmsgs cmsgs;
|
|
union sctp_addr *daddr;
|
|
bool new = false;
|
|
__u16 sflags;
|
|
int err;
|
|
|
|
/* Parse and get snd_info */
|
|
err = sctp_sendmsg_parse(sk, &cmsgs, &_sinfo, msg, msg_len);
|
|
if (err)
|
|
goto out;
|
|
|
|
sinfo = &_sinfo;
|
|
sflags = sinfo->sinfo_flags;
|
|
|
|
/* Get daddr from msg */
|
|
daddr = sctp_sendmsg_get_daddr(sk, msg, &cmsgs);
|
|
if (IS_ERR(daddr)) {
|
|
err = PTR_ERR(daddr);
|
|
goto out;
|
|
}
|
|
|
|
lock_sock(sk);
|
|
|
|
/* SCTP_SENDALL process */
|
|
if ((sflags & SCTP_SENDALL) && sctp_style(sk, UDP)) {
|
|
list_for_each_entry_safe(asoc, tmp, &ep->asocs, asocs) {
|
|
err = sctp_sendmsg_check_sflags(asoc, sflags, msg,
|
|
msg_len);
|
|
if (err == 0)
|
|
continue;
|
|
if (err < 0)
|
|
goto out_unlock;
|
|
|
|
sctp_sendmsg_update_sinfo(asoc, sinfo, &cmsgs);
|
|
|
|
err = sctp_sendmsg_to_asoc(asoc, msg, msg_len,
|
|
NULL, sinfo);
|
|
if (err < 0)
|
|
goto out_unlock;
|
|
|
|
iov_iter_revert(&msg->msg_iter, err);
|
|
}
|
|
|
|
goto out_unlock;
|
|
}
|
|
|
|
/* Get and check or create asoc */
|
|
if (daddr) {
|
|
asoc = sctp_endpoint_lookup_assoc(ep, daddr, &transport);
|
|
if (asoc) {
|
|
err = sctp_sendmsg_check_sflags(asoc, sflags, msg,
|
|
msg_len);
|
|
if (err <= 0)
|
|
goto out_unlock;
|
|
} else {
|
|
err = sctp_sendmsg_new_asoc(sk, sflags, &cmsgs, daddr,
|
|
&transport);
|
|
if (err)
|
|
goto out_unlock;
|
|
|
|
asoc = transport->asoc;
|
|
new = true;
|
|
}
|
|
|
|
if (!sctp_style(sk, TCP) && !(sflags & SCTP_ADDR_OVER))
|
|
transport = NULL;
|
|
} else {
|
|
asoc = sctp_id2assoc(sk, sinfo->sinfo_assoc_id);
|
|
if (!asoc) {
|
|
err = -EPIPE;
|
|
goto out_unlock;
|
|
}
|
|
|
|
err = sctp_sendmsg_check_sflags(asoc, sflags, msg, msg_len);
|
|
if (err <= 0)
|
|
goto out_unlock;
|
|
}
|
|
|
|
/* Update snd_info with the asoc */
|
|
sctp_sendmsg_update_sinfo(asoc, sinfo, &cmsgs);
|
|
|
|
/* Send msg to the asoc */
|
|
err = sctp_sendmsg_to_asoc(asoc, msg, msg_len, transport, sinfo);
|
|
if (err < 0 && err != -ESRCH && new)
|
|
sctp_association_free(asoc);
|
|
|
|
out_unlock:
|
|
release_sock(sk);
|
|
out:
|
|
return sctp_error(sk, msg->msg_flags, err);
|
|
}
|
|
|
|
/* This is an extended version of skb_pull() that removes the data from the
|
|
* start of a skb even when data is spread across the list of skb's in the
|
|
* frag_list. len specifies the total amount of data that needs to be removed.
|
|
* when 'len' bytes could be removed from the skb, it returns 0.
|
|
* If 'len' exceeds the total skb length, it returns the no. of bytes that
|
|
* could not be removed.
|
|
*/
|
|
static int sctp_skb_pull(struct sk_buff *skb, int len)
|
|
{
|
|
struct sk_buff *list;
|
|
int skb_len = skb_headlen(skb);
|
|
int rlen;
|
|
|
|
if (len <= skb_len) {
|
|
__skb_pull(skb, len);
|
|
return 0;
|
|
}
|
|
len -= skb_len;
|
|
__skb_pull(skb, skb_len);
|
|
|
|
skb_walk_frags(skb, list) {
|
|
rlen = sctp_skb_pull(list, len);
|
|
skb->len -= (len-rlen);
|
|
skb->data_len -= (len-rlen);
|
|
|
|
if (!rlen)
|
|
return 0;
|
|
|
|
len = rlen;
|
|
}
|
|
|
|
return len;
|
|
}
|
|
|
|
/* API 3.1.3 recvmsg() - UDP Style Syntax
|
|
*
|
|
* ssize_t recvmsg(int socket, struct msghdr *message,
|
|
* int flags);
|
|
*
|
|
* socket - the socket descriptor of the endpoint.
|
|
* message - pointer to the msghdr structure which contains a single
|
|
* user message and possibly some ancillary data.
|
|
*
|
|
* See Section 5 for complete description of the data
|
|
* structures.
|
|
*
|
|
* flags - flags sent or received with the user message, see Section
|
|
* 5 for complete description of the flags.
|
|
*/
|
|
static int sctp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
|
|
int noblock, int flags, int *addr_len)
|
|
{
|
|
struct sctp_ulpevent *event = NULL;
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
struct sk_buff *skb, *head_skb;
|
|
int copied;
|
|
int err = 0;
|
|
int skb_len;
|
|
|
|
pr_debug("%s: sk:%p, msghdr:%p, len:%zd, noblock:%d, flags:0x%x, "
|
|
"addr_len:%p)\n", __func__, sk, msg, len, noblock, flags,
|
|
addr_len);
|
|
|
|
lock_sock(sk);
|
|
|
|
if (sctp_style(sk, TCP) && !sctp_sstate(sk, ESTABLISHED) &&
|
|
!sctp_sstate(sk, CLOSING) && !sctp_sstate(sk, CLOSED)) {
|
|
err = -ENOTCONN;
|
|
goto out;
|
|
}
|
|
|
|
skb = sctp_skb_recv_datagram(sk, flags, noblock, &err);
|
|
if (!skb)
|
|
goto out;
|
|
|
|
/* Get the total length of the skb including any skb's in the
|
|
* frag_list.
|
|
*/
|
|
skb_len = skb->len;
|
|
|
|
copied = skb_len;
|
|
if (copied > len)
|
|
copied = len;
|
|
|
|
err = skb_copy_datagram_msg(skb, 0, msg, copied);
|
|
|
|
event = sctp_skb2event(skb);
|
|
|
|
if (err)
|
|
goto out_free;
|
|
|
|
if (event->chunk && event->chunk->head_skb)
|
|
head_skb = event->chunk->head_skb;
|
|
else
|
|
head_skb = skb;
|
|
sock_recv_ts_and_drops(msg, sk, head_skb);
|
|
if (sctp_ulpevent_is_notification(event)) {
|
|
msg->msg_flags |= MSG_NOTIFICATION;
|
|
sp->pf->event_msgname(event, msg->msg_name, addr_len);
|
|
} else {
|
|
sp->pf->skb_msgname(head_skb, msg->msg_name, addr_len);
|
|
}
|
|
|
|
/* Check if we allow SCTP_NXTINFO. */
|
|
if (sp->recvnxtinfo)
|
|
sctp_ulpevent_read_nxtinfo(event, msg, sk);
|
|
/* Check if we allow SCTP_RCVINFO. */
|
|
if (sp->recvrcvinfo)
|
|
sctp_ulpevent_read_rcvinfo(event, msg);
|
|
/* Check if we allow SCTP_SNDRCVINFO. */
|
|
if (sctp_ulpevent_type_enabled(sp->subscribe, SCTP_DATA_IO_EVENT))
|
|
sctp_ulpevent_read_sndrcvinfo(event, msg);
|
|
|
|
err = copied;
|
|
|
|
/* If skb's length exceeds the user's buffer, update the skb and
|
|
* push it back to the receive_queue so that the next call to
|
|
* recvmsg() will return the remaining data. Don't set MSG_EOR.
|
|
*/
|
|
if (skb_len > copied) {
|
|
msg->msg_flags &= ~MSG_EOR;
|
|
if (flags & MSG_PEEK)
|
|
goto out_free;
|
|
sctp_skb_pull(skb, copied);
|
|
skb_queue_head(&sk->sk_receive_queue, skb);
|
|
|
|
/* When only partial message is copied to the user, increase
|
|
* rwnd by that amount. If all the data in the skb is read,
|
|
* rwnd is updated when the event is freed.
|
|
*/
|
|
if (!sctp_ulpevent_is_notification(event))
|
|
sctp_assoc_rwnd_increase(event->asoc, copied);
|
|
goto out;
|
|
} else if ((event->msg_flags & MSG_NOTIFICATION) ||
|
|
(event->msg_flags & MSG_EOR))
|
|
msg->msg_flags |= MSG_EOR;
|
|
else
|
|
msg->msg_flags &= ~MSG_EOR;
|
|
|
|
out_free:
|
|
if (flags & MSG_PEEK) {
|
|
/* Release the skb reference acquired after peeking the skb in
|
|
* sctp_skb_recv_datagram().
|
|
*/
|
|
kfree_skb(skb);
|
|
} else {
|
|
/* Free the event which includes releasing the reference to
|
|
* the owner of the skb, freeing the skb and updating the
|
|
* rwnd.
|
|
*/
|
|
sctp_ulpevent_free(event);
|
|
}
|
|
out:
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
|
|
/* 7.1.12 Enable/Disable message fragmentation (SCTP_DISABLE_FRAGMENTS)
|
|
*
|
|
* This option is a on/off flag. If enabled no SCTP message
|
|
* fragmentation will be performed. Instead if a message being sent
|
|
* exceeds the current PMTU size, the message will NOT be sent and
|
|
* instead a error will be indicated to the user.
|
|
*/
|
|
static int sctp_setsockopt_disable_fragments(struct sock *sk, int *val,
|
|
unsigned int optlen)
|
|
{
|
|
if (optlen < sizeof(int))
|
|
return -EINVAL;
|
|
sctp_sk(sk)->disable_fragments = (*val == 0) ? 0 : 1;
|
|
return 0;
|
|
}
|
|
|
|
static int sctp_setsockopt_events(struct sock *sk, __u8 *sn_type,
|
|
unsigned int optlen)
|
|
{
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
struct sctp_association *asoc;
|
|
int i;
|
|
|
|
if (optlen > sizeof(struct sctp_event_subscribe))
|
|
return -EINVAL;
|
|
|
|
for (i = 0; i < optlen; i++)
|
|
sctp_ulpevent_type_set(&sp->subscribe, SCTP_SN_TYPE_BASE + i,
|
|
sn_type[i]);
|
|
|
|
list_for_each_entry(asoc, &sp->ep->asocs, asocs)
|
|
asoc->subscribe = sctp_sk(sk)->subscribe;
|
|
|
|
/* At the time when a user app subscribes to SCTP_SENDER_DRY_EVENT,
|
|
* if there is no data to be sent or retransmit, the stack will
|
|
* immediately send up this notification.
|
|
*/
|
|
if (sctp_ulpevent_type_enabled(sp->subscribe, SCTP_SENDER_DRY_EVENT)) {
|
|
struct sctp_ulpevent *event;
|
|
|
|
asoc = sctp_id2assoc(sk, 0);
|
|
if (asoc && sctp_outq_is_empty(&asoc->outqueue)) {
|
|
event = sctp_ulpevent_make_sender_dry_event(asoc,
|
|
GFP_USER | __GFP_NOWARN);
|
|
if (!event)
|
|
return -ENOMEM;
|
|
|
|
asoc->stream.si->enqueue_event(&asoc->ulpq, event);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* 7.1.8 Automatic Close of associations (SCTP_AUTOCLOSE)
|
|
*
|
|
* This socket option is applicable to the UDP-style socket only. When
|
|
* set it will cause associations that are idle for more than the
|
|
* specified number of seconds to automatically close. An association
|
|
* being idle is defined an association that has NOT sent or received
|
|
* user data. The special value of '0' indicates that no automatic
|
|
* close of any associations should be performed. The option expects an
|
|
* integer defining the number of seconds of idle time before an
|
|
* association is closed.
|
|
*/
|
|
static int sctp_setsockopt_autoclose(struct sock *sk, u32 *optval,
|
|
unsigned int optlen)
|
|
{
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
struct net *net = sock_net(sk);
|
|
|
|
/* Applicable to UDP-style socket only */
|
|
if (sctp_style(sk, TCP))
|
|
return -EOPNOTSUPP;
|
|
if (optlen != sizeof(int))
|
|
return -EINVAL;
|
|
|
|
sp->autoclose = *optval;
|
|
if (sp->autoclose > net->sctp.max_autoclose)
|
|
sp->autoclose = net->sctp.max_autoclose;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS)
|
|
*
|
|
* Applications can enable or disable heartbeats for any peer address of
|
|
* an association, modify an address's heartbeat interval, force a
|
|
* heartbeat to be sent immediately, and adjust the address's maximum
|
|
* number of retransmissions sent before an address is considered
|
|
* unreachable. The following structure is used to access and modify an
|
|
* address's parameters:
|
|
*
|
|
* struct sctp_paddrparams {
|
|
* sctp_assoc_t spp_assoc_id;
|
|
* struct sockaddr_storage spp_address;
|
|
* uint32_t spp_hbinterval;
|
|
* uint16_t spp_pathmaxrxt;
|
|
* uint32_t spp_pathmtu;
|
|
* uint32_t spp_sackdelay;
|
|
* uint32_t spp_flags;
|
|
* uint32_t spp_ipv6_flowlabel;
|
|
* uint8_t spp_dscp;
|
|
* };
|
|
*
|
|
* spp_assoc_id - (one-to-many style socket) This is filled in the
|
|
* application, and identifies the association for
|
|
* this query.
|
|
* spp_address - This specifies which address is of interest.
|
|
* spp_hbinterval - This contains the value of the heartbeat interval,
|
|
* in milliseconds. If a value of zero
|
|
* is present in this field then no changes are to
|
|
* be made to this parameter.
|
|
* spp_pathmaxrxt - This contains the maximum number of
|
|
* retransmissions before this address shall be
|
|
* considered unreachable. If a value of zero
|
|
* is present in this field then no changes are to
|
|
* be made to this parameter.
|
|
* spp_pathmtu - When Path MTU discovery is disabled the value
|
|
* specified here will be the "fixed" path mtu.
|
|
* Note that if the spp_address field is empty
|
|
* then all associations on this address will
|
|
* have this fixed path mtu set upon them.
|
|
*
|
|
* spp_sackdelay - When delayed sack is enabled, this value specifies
|
|
* the number of milliseconds that sacks will be delayed
|
|
* for. This value will apply to all addresses of an
|
|
* association if the spp_address field is empty. Note
|
|
* also, that if delayed sack is enabled and this
|
|
* value is set to 0, no change is made to the last
|
|
* recorded delayed sack timer value.
|
|
*
|
|
* spp_flags - These flags are used to control various features
|
|
* on an association. The flag field may contain
|
|
* zero or more of the following options.
|
|
*
|
|
* SPP_HB_ENABLE - Enable heartbeats on the
|
|
* specified address. Note that if the address
|
|
* field is empty all addresses for the association
|
|
* have heartbeats enabled upon them.
|
|
*
|
|
* SPP_HB_DISABLE - Disable heartbeats on the
|
|
* speicifed address. Note that if the address
|
|
* field is empty all addresses for the association
|
|
* will have their heartbeats disabled. Note also
|
|
* that SPP_HB_ENABLE and SPP_HB_DISABLE are
|
|
* mutually exclusive, only one of these two should
|
|
* be specified. Enabling both fields will have
|
|
* undetermined results.
|
|
*
|
|
* SPP_HB_DEMAND - Request a user initiated heartbeat
|
|
* to be made immediately.
|
|
*
|
|
* SPP_HB_TIME_IS_ZERO - Specify's that the time for
|
|
* heartbeat delayis to be set to the value of 0
|
|
* milliseconds.
|
|
*
|
|
* SPP_PMTUD_ENABLE - This field will enable PMTU
|
|
* discovery upon the specified address. Note that
|
|
* if the address feild is empty then all addresses
|
|
* on the association are effected.
|
|
*
|
|
* SPP_PMTUD_DISABLE - This field will disable PMTU
|
|
* discovery upon the specified address. Note that
|
|
* if the address feild is empty then all addresses
|
|
* on the association are effected. Not also that
|
|
* SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually
|
|
* exclusive. Enabling both will have undetermined
|
|
* results.
|
|
*
|
|
* SPP_SACKDELAY_ENABLE - Setting this flag turns
|
|
* on delayed sack. The time specified in spp_sackdelay
|
|
* is used to specify the sack delay for this address. Note
|
|
* that if spp_address is empty then all addresses will
|
|
* enable delayed sack and take on the sack delay
|
|
* value specified in spp_sackdelay.
|
|
* SPP_SACKDELAY_DISABLE - Setting this flag turns
|
|
* off delayed sack. If the spp_address field is blank then
|
|
* delayed sack is disabled for the entire association. Note
|
|
* also that this field is mutually exclusive to
|
|
* SPP_SACKDELAY_ENABLE, setting both will have undefined
|
|
* results.
|
|
*
|
|
* SPP_IPV6_FLOWLABEL: Setting this flag enables the
|
|
* setting of the IPV6 flow label value. The value is
|
|
* contained in the spp_ipv6_flowlabel field.
|
|
* Upon retrieval, this flag will be set to indicate that
|
|
* the spp_ipv6_flowlabel field has a valid value returned.
|
|
* If a specific destination address is set (in the
|
|
* spp_address field), then the value returned is that of
|
|
* the address. If just an association is specified (and
|
|
* no address), then the association's default flow label
|
|
* is returned. If neither an association nor a destination
|
|
* is specified, then the socket's default flow label is
|
|
* returned. For non-IPv6 sockets, this flag will be left
|
|
* cleared.
|
|
*
|
|
* SPP_DSCP: Setting this flag enables the setting of the
|
|
* Differentiated Services Code Point (DSCP) value
|
|
* associated with either the association or a specific
|
|
* address. The value is obtained in the spp_dscp field.
|
|
* Upon retrieval, this flag will be set to indicate that
|
|
* the spp_dscp field has a valid value returned. If a
|
|
* specific destination address is set when called (in the
|
|
* spp_address field), then that specific destination
|
|
* address's DSCP value is returned. If just an association
|
|
* is specified, then the association's default DSCP is
|
|
* returned. If neither an association nor a destination is
|
|
* specified, then the socket's default DSCP is returned.
|
|
*
|
|
* spp_ipv6_flowlabel
|
|
* - This field is used in conjunction with the
|
|
* SPP_IPV6_FLOWLABEL flag and contains the IPv6 flow label.
|
|
* The 20 least significant bits are used for the flow
|
|
* label. This setting has precedence over any IPv6-layer
|
|
* setting.
|
|
*
|
|
* spp_dscp - This field is used in conjunction with the SPP_DSCP flag
|
|
* and contains the DSCP. The 6 most significant bits are
|
|
* used for the DSCP. This setting has precedence over any
|
|
* IPv4- or IPv6- layer setting.
|
|
*/
|
|
static int sctp_apply_peer_addr_params(struct sctp_paddrparams *params,
|
|
struct sctp_transport *trans,
|
|
struct sctp_association *asoc,
|
|
struct sctp_sock *sp,
|
|
int hb_change,
|
|
int pmtud_change,
|
|
int sackdelay_change)
|
|
{
|
|
int error;
|
|
|
|
if (params->spp_flags & SPP_HB_DEMAND && trans) {
|
|
error = sctp_primitive_REQUESTHEARTBEAT(trans->asoc->base.net,
|
|
trans->asoc, trans);
|
|
if (error)
|
|
return error;
|
|
}
|
|
|
|
/* Note that unless the spp_flag is set to SPP_HB_ENABLE the value of
|
|
* this field is ignored. Note also that a value of zero indicates
|
|
* the current setting should be left unchanged.
|
|
*/
|
|
if (params->spp_flags & SPP_HB_ENABLE) {
|
|
|
|
/* Re-zero the interval if the SPP_HB_TIME_IS_ZERO is
|
|
* set. This lets us use 0 value when this flag
|
|
* is set.
|
|
*/
|
|
if (params->spp_flags & SPP_HB_TIME_IS_ZERO)
|
|
params->spp_hbinterval = 0;
|
|
|
|
if (params->spp_hbinterval ||
|
|
(params->spp_flags & SPP_HB_TIME_IS_ZERO)) {
|
|
if (trans) {
|
|
trans->hbinterval =
|
|
msecs_to_jiffies(params->spp_hbinterval);
|
|
} else if (asoc) {
|
|
asoc->hbinterval =
|
|
msecs_to_jiffies(params->spp_hbinterval);
|
|
} else {
|
|
sp->hbinterval = params->spp_hbinterval;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (hb_change) {
|
|
if (trans) {
|
|
trans->param_flags =
|
|
(trans->param_flags & ~SPP_HB) | hb_change;
|
|
} else if (asoc) {
|
|
asoc->param_flags =
|
|
(asoc->param_flags & ~SPP_HB) | hb_change;
|
|
} else {
|
|
sp->param_flags =
|
|
(sp->param_flags & ~SPP_HB) | hb_change;
|
|
}
|
|
}
|
|
|
|
/* When Path MTU discovery is disabled the value specified here will
|
|
* be the "fixed" path mtu (i.e. the value of the spp_flags field must
|
|
* include the flag SPP_PMTUD_DISABLE for this field to have any
|
|
* effect).
|
|
*/
|
|
if ((params->spp_flags & SPP_PMTUD_DISABLE) && params->spp_pathmtu) {
|
|
if (trans) {
|
|
trans->pathmtu = params->spp_pathmtu;
|
|
sctp_assoc_sync_pmtu(asoc);
|
|
} else if (asoc) {
|
|
sctp_assoc_set_pmtu(asoc, params->spp_pathmtu);
|
|
} else {
|
|
sp->pathmtu = params->spp_pathmtu;
|
|
}
|
|
}
|
|
|
|
if (pmtud_change) {
|
|
if (trans) {
|
|
int update = (trans->param_flags & SPP_PMTUD_DISABLE) &&
|
|
(params->spp_flags & SPP_PMTUD_ENABLE);
|
|
trans->param_flags =
|
|
(trans->param_flags & ~SPP_PMTUD) | pmtud_change;
|
|
if (update) {
|
|
sctp_transport_pmtu(trans, sctp_opt2sk(sp));
|
|
sctp_assoc_sync_pmtu(asoc);
|
|
}
|
|
sctp_transport_pl_reset(trans);
|
|
} else if (asoc) {
|
|
asoc->param_flags =
|
|
(asoc->param_flags & ~SPP_PMTUD) | pmtud_change;
|
|
} else {
|
|
sp->param_flags =
|
|
(sp->param_flags & ~SPP_PMTUD) | pmtud_change;
|
|
}
|
|
}
|
|
|
|
/* Note that unless the spp_flag is set to SPP_SACKDELAY_ENABLE the
|
|
* value of this field is ignored. Note also that a value of zero
|
|
* indicates the current setting should be left unchanged.
|
|
*/
|
|
if ((params->spp_flags & SPP_SACKDELAY_ENABLE) && params->spp_sackdelay) {
|
|
if (trans) {
|
|
trans->sackdelay =
|
|
msecs_to_jiffies(params->spp_sackdelay);
|
|
} else if (asoc) {
|
|
asoc->sackdelay =
|
|
msecs_to_jiffies(params->spp_sackdelay);
|
|
} else {
|
|
sp->sackdelay = params->spp_sackdelay;
|
|
}
|
|
}
|
|
|
|
if (sackdelay_change) {
|
|
if (trans) {
|
|
trans->param_flags =
|
|
(trans->param_flags & ~SPP_SACKDELAY) |
|
|
sackdelay_change;
|
|
} else if (asoc) {
|
|
asoc->param_flags =
|
|
(asoc->param_flags & ~SPP_SACKDELAY) |
|
|
sackdelay_change;
|
|
} else {
|
|
sp->param_flags =
|
|
(sp->param_flags & ~SPP_SACKDELAY) |
|
|
sackdelay_change;
|
|
}
|
|
}
|
|
|
|
/* Note that a value of zero indicates the current setting should be
|
|
left unchanged.
|
|
*/
|
|
if (params->spp_pathmaxrxt) {
|
|
if (trans) {
|
|
trans->pathmaxrxt = params->spp_pathmaxrxt;
|
|
} else if (asoc) {
|
|
asoc->pathmaxrxt = params->spp_pathmaxrxt;
|
|
} else {
|
|
sp->pathmaxrxt = params->spp_pathmaxrxt;
|
|
}
|
|
}
|
|
|
|
if (params->spp_flags & SPP_IPV6_FLOWLABEL) {
|
|
if (trans) {
|
|
if (trans->ipaddr.sa.sa_family == AF_INET6) {
|
|
trans->flowlabel = params->spp_ipv6_flowlabel &
|
|
SCTP_FLOWLABEL_VAL_MASK;
|
|
trans->flowlabel |= SCTP_FLOWLABEL_SET_MASK;
|
|
}
|
|
} else if (asoc) {
|
|
struct sctp_transport *t;
|
|
|
|
list_for_each_entry(t, &asoc->peer.transport_addr_list,
|
|
transports) {
|
|
if (t->ipaddr.sa.sa_family != AF_INET6)
|
|
continue;
|
|
t->flowlabel = params->spp_ipv6_flowlabel &
|
|
SCTP_FLOWLABEL_VAL_MASK;
|
|
t->flowlabel |= SCTP_FLOWLABEL_SET_MASK;
|
|
}
|
|
asoc->flowlabel = params->spp_ipv6_flowlabel &
|
|
SCTP_FLOWLABEL_VAL_MASK;
|
|
asoc->flowlabel |= SCTP_FLOWLABEL_SET_MASK;
|
|
} else if (sctp_opt2sk(sp)->sk_family == AF_INET6) {
|
|
sp->flowlabel = params->spp_ipv6_flowlabel &
|
|
SCTP_FLOWLABEL_VAL_MASK;
|
|
sp->flowlabel |= SCTP_FLOWLABEL_SET_MASK;
|
|
}
|
|
}
|
|
|
|
if (params->spp_flags & SPP_DSCP) {
|
|
if (trans) {
|
|
trans->dscp = params->spp_dscp & SCTP_DSCP_VAL_MASK;
|
|
trans->dscp |= SCTP_DSCP_SET_MASK;
|
|
} else if (asoc) {
|
|
struct sctp_transport *t;
|
|
|
|
list_for_each_entry(t, &asoc->peer.transport_addr_list,
|
|
transports) {
|
|
t->dscp = params->spp_dscp &
|
|
SCTP_DSCP_VAL_MASK;
|
|
t->dscp |= SCTP_DSCP_SET_MASK;
|
|
}
|
|
asoc->dscp = params->spp_dscp & SCTP_DSCP_VAL_MASK;
|
|
asoc->dscp |= SCTP_DSCP_SET_MASK;
|
|
} else {
|
|
sp->dscp = params->spp_dscp & SCTP_DSCP_VAL_MASK;
|
|
sp->dscp |= SCTP_DSCP_SET_MASK;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sctp_setsockopt_peer_addr_params(struct sock *sk,
|
|
struct sctp_paddrparams *params,
|
|
unsigned int optlen)
|
|
{
|
|
struct sctp_transport *trans = NULL;
|
|
struct sctp_association *asoc = NULL;
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
int error;
|
|
int hb_change, pmtud_change, sackdelay_change;
|
|
|
|
if (optlen == ALIGN(offsetof(struct sctp_paddrparams,
|
|
spp_ipv6_flowlabel), 4)) {
|
|
if (params->spp_flags & (SPP_DSCP | SPP_IPV6_FLOWLABEL))
|
|
return -EINVAL;
|
|
} else if (optlen != sizeof(*params)) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Validate flags and value parameters. */
|
|
hb_change = params->spp_flags & SPP_HB;
|
|
pmtud_change = params->spp_flags & SPP_PMTUD;
|
|
sackdelay_change = params->spp_flags & SPP_SACKDELAY;
|
|
|
|
if (hb_change == SPP_HB ||
|
|
pmtud_change == SPP_PMTUD ||
|
|
sackdelay_change == SPP_SACKDELAY ||
|
|
params->spp_sackdelay > 500 ||
|
|
(params->spp_pathmtu &&
|
|
params->spp_pathmtu < SCTP_DEFAULT_MINSEGMENT))
|
|
return -EINVAL;
|
|
|
|
/* If an address other than INADDR_ANY is specified, and
|
|
* no transport is found, then the request is invalid.
|
|
*/
|
|
if (!sctp_is_any(sk, (union sctp_addr *)¶ms->spp_address)) {
|
|
trans = sctp_addr_id2transport(sk, ¶ms->spp_address,
|
|
params->spp_assoc_id);
|
|
if (!trans)
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the
|
|
* socket is a one to many style socket, and an association
|
|
* was not found, then the id was invalid.
|
|
*/
|
|
asoc = sctp_id2assoc(sk, params->spp_assoc_id);
|
|
if (!asoc && params->spp_assoc_id != SCTP_FUTURE_ASSOC &&
|
|
sctp_style(sk, UDP))
|
|
return -EINVAL;
|
|
|
|
/* Heartbeat demand can only be sent on a transport or
|
|
* association, but not a socket.
|
|
*/
|
|
if (params->spp_flags & SPP_HB_DEMAND && !trans && !asoc)
|
|
return -EINVAL;
|
|
|
|
/* Process parameters. */
|
|
error = sctp_apply_peer_addr_params(params, trans, asoc, sp,
|
|
hb_change, pmtud_change,
|
|
sackdelay_change);
|
|
|
|
if (error)
|
|
return error;
|
|
|
|
/* If changes are for association, also apply parameters to each
|
|
* transport.
|
|
*/
|
|
if (!trans && asoc) {
|
|
list_for_each_entry(trans, &asoc->peer.transport_addr_list,
|
|
transports) {
|
|
sctp_apply_peer_addr_params(params, trans, asoc, sp,
|
|
hb_change, pmtud_change,
|
|
sackdelay_change);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline __u32 sctp_spp_sackdelay_enable(__u32 param_flags)
|
|
{
|
|
return (param_flags & ~SPP_SACKDELAY) | SPP_SACKDELAY_ENABLE;
|
|
}
|
|
|
|
static inline __u32 sctp_spp_sackdelay_disable(__u32 param_flags)
|
|
{
|
|
return (param_flags & ~SPP_SACKDELAY) | SPP_SACKDELAY_DISABLE;
|
|
}
|
|
|
|
static void sctp_apply_asoc_delayed_ack(struct sctp_sack_info *params,
|
|
struct sctp_association *asoc)
|
|
{
|
|
struct sctp_transport *trans;
|
|
|
|
if (params->sack_delay) {
|
|
asoc->sackdelay = msecs_to_jiffies(params->sack_delay);
|
|
asoc->param_flags =
|
|
sctp_spp_sackdelay_enable(asoc->param_flags);
|
|
}
|
|
if (params->sack_freq == 1) {
|
|
asoc->param_flags =
|
|
sctp_spp_sackdelay_disable(asoc->param_flags);
|
|
} else if (params->sack_freq > 1) {
|
|
asoc->sackfreq = params->sack_freq;
|
|
asoc->param_flags =
|
|
sctp_spp_sackdelay_enable(asoc->param_flags);
|
|
}
|
|
|
|
list_for_each_entry(trans, &asoc->peer.transport_addr_list,
|
|
transports) {
|
|
if (params->sack_delay) {
|
|
trans->sackdelay = msecs_to_jiffies(params->sack_delay);
|
|
trans->param_flags =
|
|
sctp_spp_sackdelay_enable(trans->param_flags);
|
|
}
|
|
if (params->sack_freq == 1) {
|
|
trans->param_flags =
|
|
sctp_spp_sackdelay_disable(trans->param_flags);
|
|
} else if (params->sack_freq > 1) {
|
|
trans->sackfreq = params->sack_freq;
|
|
trans->param_flags =
|
|
sctp_spp_sackdelay_enable(trans->param_flags);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 7.1.23. Get or set delayed ack timer (SCTP_DELAYED_SACK)
|
|
*
|
|
* This option will effect the way delayed acks are performed. This
|
|
* option allows you to get or set the delayed ack time, in
|
|
* milliseconds. It also allows changing the delayed ack frequency.
|
|
* Changing the frequency to 1 disables the delayed sack algorithm. If
|
|
* the assoc_id is 0, then this sets or gets the endpoints default
|
|
* values. If the assoc_id field is non-zero, then the set or get
|
|
* effects the specified association for the one to many model (the
|
|
* assoc_id field is ignored by the one to one model). Note that if
|
|
* sack_delay or sack_freq are 0 when setting this option, then the
|
|
* current values will remain unchanged.
|
|
*
|
|
* struct sctp_sack_info {
|
|
* sctp_assoc_t sack_assoc_id;
|
|
* uint32_t sack_delay;
|
|
* uint32_t sack_freq;
|
|
* };
|
|
*
|
|
* sack_assoc_id - This parameter, indicates which association the user
|
|
* is performing an action upon. Note that if this field's value is
|
|
* zero then the endpoints default value is changed (effecting future
|
|
* associations only).
|
|
*
|
|
* sack_delay - This parameter contains the number of milliseconds that
|
|
* the user is requesting the delayed ACK timer be set to. Note that
|
|
* this value is defined in the standard to be between 200 and 500
|
|
* milliseconds.
|
|
*
|
|
* sack_freq - This parameter contains the number of packets that must
|
|
* be received before a sack is sent without waiting for the delay
|
|
* timer to expire. The default value for this is 2, setting this
|
|
* value to 1 will disable the delayed sack algorithm.
|
|
*/
|
|
static int __sctp_setsockopt_delayed_ack(struct sock *sk,
|
|
struct sctp_sack_info *params)
|
|
{
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
struct sctp_association *asoc;
|
|
|
|
/* Validate value parameter. */
|
|
if (params->sack_delay > 500)
|
|
return -EINVAL;
|
|
|
|
/* Get association, if sack_assoc_id != SCTP_FUTURE_ASSOC and the
|
|
* socket is a one to many style socket, and an association
|
|
* was not found, then the id was invalid.
|
|
*/
|
|
asoc = sctp_id2assoc(sk, params->sack_assoc_id);
|
|
if (!asoc && params->sack_assoc_id > SCTP_ALL_ASSOC &&
|
|
sctp_style(sk, UDP))
|
|
return -EINVAL;
|
|
|
|
if (asoc) {
|
|
sctp_apply_asoc_delayed_ack(params, asoc);
|
|
|
|
return 0;
|
|
}
|
|
|
|
if (sctp_style(sk, TCP))
|
|
params->sack_assoc_id = SCTP_FUTURE_ASSOC;
|
|
|
|
if (params->sack_assoc_id == SCTP_FUTURE_ASSOC ||
|
|
params->sack_assoc_id == SCTP_ALL_ASSOC) {
|
|
if (params->sack_delay) {
|
|
sp->sackdelay = params->sack_delay;
|
|
sp->param_flags =
|
|
sctp_spp_sackdelay_enable(sp->param_flags);
|
|
}
|
|
if (params->sack_freq == 1) {
|
|
sp->param_flags =
|
|
sctp_spp_sackdelay_disable(sp->param_flags);
|
|
} else if (params->sack_freq > 1) {
|
|
sp->sackfreq = params->sack_freq;
|
|
sp->param_flags =
|
|
sctp_spp_sackdelay_enable(sp->param_flags);
|
|
}
|
|
}
|
|
|
|
if (params->sack_assoc_id == SCTP_CURRENT_ASSOC ||
|
|
params->sack_assoc_id == SCTP_ALL_ASSOC)
|
|
list_for_each_entry(asoc, &sp->ep->asocs, asocs)
|
|
sctp_apply_asoc_delayed_ack(params, asoc);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sctp_setsockopt_delayed_ack(struct sock *sk,
|
|
struct sctp_sack_info *params,
|
|
unsigned int optlen)
|
|
{
|
|
if (optlen == sizeof(struct sctp_assoc_value)) {
|
|
struct sctp_assoc_value *v = (struct sctp_assoc_value *)params;
|
|
struct sctp_sack_info p;
|
|
|
|
pr_warn_ratelimited(DEPRECATED
|
|
"%s (pid %d) "
|
|
"Use of struct sctp_assoc_value in delayed_ack socket option.\n"
|
|
"Use struct sctp_sack_info instead\n",
|
|
current->comm, task_pid_nr(current));
|
|
|
|
p.sack_assoc_id = v->assoc_id;
|
|
p.sack_delay = v->assoc_value;
|
|
p.sack_freq = v->assoc_value ? 0 : 1;
|
|
return __sctp_setsockopt_delayed_ack(sk, &p);
|
|
}
|
|
|
|
if (optlen != sizeof(struct sctp_sack_info))
|
|
return -EINVAL;
|
|
if (params->sack_delay == 0 && params->sack_freq == 0)
|
|
return 0;
|
|
return __sctp_setsockopt_delayed_ack(sk, params);
|
|
}
|
|
|
|
/* 7.1.3 Initialization Parameters (SCTP_INITMSG)
|
|
*
|
|
* Applications can specify protocol parameters for the default association
|
|
* initialization. The option name argument to setsockopt() and getsockopt()
|
|
* is SCTP_INITMSG.
|
|
*
|
|
* Setting initialization parameters is effective only on an unconnected
|
|
* socket (for UDP-style sockets only future associations are effected
|
|
* by the change). With TCP-style sockets, this option is inherited by
|
|
* sockets derived from a listener socket.
|
|
*/
|
|
static int sctp_setsockopt_initmsg(struct sock *sk, struct sctp_initmsg *sinit,
|
|
unsigned int optlen)
|
|
{
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
|
|
if (optlen != sizeof(struct sctp_initmsg))
|
|
return -EINVAL;
|
|
|
|
if (sinit->sinit_num_ostreams)
|
|
sp->initmsg.sinit_num_ostreams = sinit->sinit_num_ostreams;
|
|
if (sinit->sinit_max_instreams)
|
|
sp->initmsg.sinit_max_instreams = sinit->sinit_max_instreams;
|
|
if (sinit->sinit_max_attempts)
|
|
sp->initmsg.sinit_max_attempts = sinit->sinit_max_attempts;
|
|
if (sinit->sinit_max_init_timeo)
|
|
sp->initmsg.sinit_max_init_timeo = sinit->sinit_max_init_timeo;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 7.1.14 Set default send parameters (SCTP_DEFAULT_SEND_PARAM)
|
|
*
|
|
* Applications that wish to use the sendto() system call may wish to
|
|
* specify a default set of parameters that would normally be supplied
|
|
* through the inclusion of ancillary data. This socket option allows
|
|
* such an application to set the default sctp_sndrcvinfo structure.
|
|
* The application that wishes to use this socket option simply passes
|
|
* in to this call the sctp_sndrcvinfo structure defined in Section
|
|
* 5.2.2) The input parameters accepted by this call include
|
|
* sinfo_stream, sinfo_flags, sinfo_ppid, sinfo_context,
|
|
* sinfo_timetolive. The user must provide the sinfo_assoc_id field in
|
|
* to this call if the caller is using the UDP model.
|
|
*/
|
|
static int sctp_setsockopt_default_send_param(struct sock *sk,
|
|
struct sctp_sndrcvinfo *info,
|
|
unsigned int optlen)
|
|
{
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
struct sctp_association *asoc;
|
|
|
|
if (optlen != sizeof(*info))
|
|
return -EINVAL;
|
|
if (info->sinfo_flags &
|
|
~(SCTP_UNORDERED | SCTP_ADDR_OVER |
|
|
SCTP_ABORT | SCTP_EOF))
|
|
return -EINVAL;
|
|
|
|
asoc = sctp_id2assoc(sk, info->sinfo_assoc_id);
|
|
if (!asoc && info->sinfo_assoc_id > SCTP_ALL_ASSOC &&
|
|
sctp_style(sk, UDP))
|
|
return -EINVAL;
|
|
|
|
if (asoc) {
|
|
asoc->default_stream = info->sinfo_stream;
|
|
asoc->default_flags = info->sinfo_flags;
|
|
asoc->default_ppid = info->sinfo_ppid;
|
|
asoc->default_context = info->sinfo_context;
|
|
asoc->default_timetolive = info->sinfo_timetolive;
|
|
|
|
return 0;
|
|
}
|
|
|
|
if (sctp_style(sk, TCP))
|
|
info->sinfo_assoc_id = SCTP_FUTURE_ASSOC;
|
|
|
|
if (info->sinfo_assoc_id == SCTP_FUTURE_ASSOC ||
|
|
info->sinfo_assoc_id == SCTP_ALL_ASSOC) {
|
|
sp->default_stream = info->sinfo_stream;
|
|
sp->default_flags = info->sinfo_flags;
|
|
sp->default_ppid = info->sinfo_ppid;
|
|
sp->default_context = info->sinfo_context;
|
|
sp->default_timetolive = info->sinfo_timetolive;
|
|
}
|
|
|
|
if (info->sinfo_assoc_id == SCTP_CURRENT_ASSOC ||
|
|
info->sinfo_assoc_id == SCTP_ALL_ASSOC) {
|
|
list_for_each_entry(asoc, &sp->ep->asocs, asocs) {
|
|
asoc->default_stream = info->sinfo_stream;
|
|
asoc->default_flags = info->sinfo_flags;
|
|
asoc->default_ppid = info->sinfo_ppid;
|
|
asoc->default_context = info->sinfo_context;
|
|
asoc->default_timetolive = info->sinfo_timetolive;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* RFC6458, Section 8.1.31. Set/get Default Send Parameters
|
|
* (SCTP_DEFAULT_SNDINFO)
|
|
*/
|
|
static int sctp_setsockopt_default_sndinfo(struct sock *sk,
|
|
struct sctp_sndinfo *info,
|
|
unsigned int optlen)
|
|
{
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
struct sctp_association *asoc;
|
|
|
|
if (optlen != sizeof(*info))
|
|
return -EINVAL;
|
|
if (info->snd_flags &
|
|
~(SCTP_UNORDERED | SCTP_ADDR_OVER |
|
|
SCTP_ABORT | SCTP_EOF))
|
|
return -EINVAL;
|
|
|
|
asoc = sctp_id2assoc(sk, info->snd_assoc_id);
|
|
if (!asoc && info->snd_assoc_id > SCTP_ALL_ASSOC &&
|
|
sctp_style(sk, UDP))
|
|
return -EINVAL;
|
|
|
|
if (asoc) {
|
|
asoc->default_stream = info->snd_sid;
|
|
asoc->default_flags = info->snd_flags;
|
|
asoc->default_ppid = info->snd_ppid;
|
|
asoc->default_context = info->snd_context;
|
|
|
|
return 0;
|
|
}
|
|
|
|
if (sctp_style(sk, TCP))
|
|
info->snd_assoc_id = SCTP_FUTURE_ASSOC;
|
|
|
|
if (info->snd_assoc_id == SCTP_FUTURE_ASSOC ||
|
|
info->snd_assoc_id == SCTP_ALL_ASSOC) {
|
|
sp->default_stream = info->snd_sid;
|
|
sp->default_flags = info->snd_flags;
|
|
sp->default_ppid = info->snd_ppid;
|
|
sp->default_context = info->snd_context;
|
|
}
|
|
|
|
if (info->snd_assoc_id == SCTP_CURRENT_ASSOC ||
|
|
info->snd_assoc_id == SCTP_ALL_ASSOC) {
|
|
list_for_each_entry(asoc, &sp->ep->asocs, asocs) {
|
|
asoc->default_stream = info->snd_sid;
|
|
asoc->default_flags = info->snd_flags;
|
|
asoc->default_ppid = info->snd_ppid;
|
|
asoc->default_context = info->snd_context;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR)
|
|
*
|
|
* Requests that the local SCTP stack use the enclosed peer address as
|
|
* the association primary. The enclosed address must be one of the
|
|
* association peer's addresses.
|
|
*/
|
|
static int sctp_setsockopt_primary_addr(struct sock *sk, struct sctp_prim *prim,
|
|
unsigned int optlen)
|
|
{
|
|
struct sctp_transport *trans;
|
|
struct sctp_af *af;
|
|
int err;
|
|
|
|
if (optlen != sizeof(struct sctp_prim))
|
|
return -EINVAL;
|
|
|
|
/* Allow security module to validate address but need address len. */
|
|
af = sctp_get_af_specific(prim->ssp_addr.ss_family);
|
|
if (!af)
|
|
return -EINVAL;
|
|
|
|
err = security_sctp_bind_connect(sk, SCTP_PRIMARY_ADDR,
|
|
(struct sockaddr *)&prim->ssp_addr,
|
|
af->sockaddr_len);
|
|
if (err)
|
|
return err;
|
|
|
|
trans = sctp_addr_id2transport(sk, &prim->ssp_addr, prim->ssp_assoc_id);
|
|
if (!trans)
|
|
return -EINVAL;
|
|
|
|
sctp_assoc_set_primary(trans->asoc, trans);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 7.1.5 SCTP_NODELAY
|
|
*
|
|
* Turn on/off any Nagle-like algorithm. This means that packets are
|
|
* generally sent as soon as possible and no unnecessary delays are
|
|
* introduced, at the cost of more packets in the network. Expects an
|
|
* integer boolean flag.
|
|
*/
|
|
static int sctp_setsockopt_nodelay(struct sock *sk, int *val,
|
|
unsigned int optlen)
|
|
{
|
|
if (optlen < sizeof(int))
|
|
return -EINVAL;
|
|
sctp_sk(sk)->nodelay = (*val == 0) ? 0 : 1;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
*
|
|
* 7.1.1 SCTP_RTOINFO
|
|
*
|
|
* The protocol parameters used to initialize and bound retransmission
|
|
* timeout (RTO) are tunable. sctp_rtoinfo structure is used to access
|
|
* and modify these parameters.
|
|
* All parameters are time values, in milliseconds. A value of 0, when
|
|
* modifying the parameters, indicates that the current value should not
|
|
* be changed.
|
|
*
|
|
*/
|
|
static int sctp_setsockopt_rtoinfo(struct sock *sk,
|
|
struct sctp_rtoinfo *rtoinfo,
|
|
unsigned int optlen)
|
|
{
|
|
struct sctp_association *asoc;
|
|
unsigned long rto_min, rto_max;
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
|
|
if (optlen != sizeof (struct sctp_rtoinfo))
|
|
return -EINVAL;
|
|
|
|
asoc = sctp_id2assoc(sk, rtoinfo->srto_assoc_id);
|
|
|
|
/* Set the values to the specific association */
|
|
if (!asoc && rtoinfo->srto_assoc_id != SCTP_FUTURE_ASSOC &&
|
|
sctp_style(sk, UDP))
|
|
return -EINVAL;
|
|
|
|
rto_max = rtoinfo->srto_max;
|
|
rto_min = rtoinfo->srto_min;
|
|
|
|
if (rto_max)
|
|
rto_max = asoc ? msecs_to_jiffies(rto_max) : rto_max;
|
|
else
|
|
rto_max = asoc ? asoc->rto_max : sp->rtoinfo.srto_max;
|
|
|
|
if (rto_min)
|
|
rto_min = asoc ? msecs_to_jiffies(rto_min) : rto_min;
|
|
else
|
|
rto_min = asoc ? asoc->rto_min : sp->rtoinfo.srto_min;
|
|
|
|
if (rto_min > rto_max)
|
|
return -EINVAL;
|
|
|
|
if (asoc) {
|
|
if (rtoinfo->srto_initial != 0)
|
|
asoc->rto_initial =
|
|
msecs_to_jiffies(rtoinfo->srto_initial);
|
|
asoc->rto_max = rto_max;
|
|
asoc->rto_min = rto_min;
|
|
} else {
|
|
/* If there is no association or the association-id = 0
|
|
* set the values to the endpoint.
|
|
*/
|
|
if (rtoinfo->srto_initial != 0)
|
|
sp->rtoinfo.srto_initial = rtoinfo->srto_initial;
|
|
sp->rtoinfo.srto_max = rto_max;
|
|
sp->rtoinfo.srto_min = rto_min;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
*
|
|
* 7.1.2 SCTP_ASSOCINFO
|
|
*
|
|
* This option is used to tune the maximum retransmission attempts
|
|
* of the association.
|
|
* Returns an error if the new association retransmission value is
|
|
* greater than the sum of the retransmission value of the peer.
|
|
* See [SCTP] for more information.
|
|
*
|
|
*/
|
|
static int sctp_setsockopt_associnfo(struct sock *sk,
|
|
struct sctp_assocparams *assocparams,
|
|
unsigned int optlen)
|
|
{
|
|
|
|
struct sctp_association *asoc;
|
|
|
|
if (optlen != sizeof(struct sctp_assocparams))
|
|
return -EINVAL;
|
|
|
|
asoc = sctp_id2assoc(sk, assocparams->sasoc_assoc_id);
|
|
|
|
if (!asoc && assocparams->sasoc_assoc_id != SCTP_FUTURE_ASSOC &&
|
|
sctp_style(sk, UDP))
|
|
return -EINVAL;
|
|
|
|
/* Set the values to the specific association */
|
|
if (asoc) {
|
|
if (assocparams->sasoc_asocmaxrxt != 0) {
|
|
__u32 path_sum = 0;
|
|
int paths = 0;
|
|
struct sctp_transport *peer_addr;
|
|
|
|
list_for_each_entry(peer_addr, &asoc->peer.transport_addr_list,
|
|
transports) {
|
|
path_sum += peer_addr->pathmaxrxt;
|
|
paths++;
|
|
}
|
|
|
|
/* Only validate asocmaxrxt if we have more than
|
|
* one path/transport. We do this because path
|
|
* retransmissions are only counted when we have more
|
|
* then one path.
|
|
*/
|
|
if (paths > 1 &&
|
|
assocparams->sasoc_asocmaxrxt > path_sum)
|
|
return -EINVAL;
|
|
|
|
asoc->max_retrans = assocparams->sasoc_asocmaxrxt;
|
|
}
|
|
|
|
if (assocparams->sasoc_cookie_life != 0)
|
|
asoc->cookie_life =
|
|
ms_to_ktime(assocparams->sasoc_cookie_life);
|
|
} else {
|
|
/* Set the values to the endpoint */
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
|
|
if (assocparams->sasoc_asocmaxrxt != 0)
|
|
sp->assocparams.sasoc_asocmaxrxt =
|
|
assocparams->sasoc_asocmaxrxt;
|
|
if (assocparams->sasoc_cookie_life != 0)
|
|
sp->assocparams.sasoc_cookie_life =
|
|
assocparams->sasoc_cookie_life;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 7.1.16 Set/clear IPv4 mapped addresses (SCTP_I_WANT_MAPPED_V4_ADDR)
|
|
*
|
|
* This socket option is a boolean flag which turns on or off mapped V4
|
|
* addresses. If this option is turned on and the socket is type
|
|
* PF_INET6, then IPv4 addresses will be mapped to V6 representation.
|
|
* If this option is turned off, then no mapping will be done of V4
|
|
* addresses and a user will receive both PF_INET6 and PF_INET type
|
|
* addresses on the socket.
|
|
*/
|
|
static int sctp_setsockopt_mappedv4(struct sock *sk, int *val,
|
|
unsigned int optlen)
|
|
{
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
|
|
if (optlen < sizeof(int))
|
|
return -EINVAL;
|
|
if (*val)
|
|
sp->v4mapped = 1;
|
|
else
|
|
sp->v4mapped = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 8.1.16. Get or Set the Maximum Fragmentation Size (SCTP_MAXSEG)
|
|
* This option will get or set the maximum size to put in any outgoing
|
|
* SCTP DATA chunk. If a message is larger than this size it will be
|
|
* fragmented by SCTP into the specified size. Note that the underlying
|
|
* SCTP implementation may fragment into smaller sized chunks when the
|
|
* PMTU of the underlying association is smaller than the value set by
|
|
* the user. The default value for this option is '0' which indicates
|
|
* the user is NOT limiting fragmentation and only the PMTU will effect
|
|
* SCTP's choice of DATA chunk size. Note also that values set larger
|
|
* than the maximum size of an IP datagram will effectively let SCTP
|
|
* control fragmentation (i.e. the same as setting this option to 0).
|
|
*
|
|
* The following structure is used to access and modify this parameter:
|
|
*
|
|
* struct sctp_assoc_value {
|
|
* sctp_assoc_t assoc_id;
|
|
* uint32_t assoc_value;
|
|
* };
|
|
*
|
|
* assoc_id: This parameter is ignored for one-to-one style sockets.
|
|
* For one-to-many style sockets this parameter indicates which
|
|
* association the user is performing an action upon. Note that if
|
|
* this field's value is zero then the endpoints default value is
|
|
* changed (effecting future associations only).
|
|
* assoc_value: This parameter specifies the maximum size in bytes.
|
|
*/
|
|
static int sctp_setsockopt_maxseg(struct sock *sk,
|
|
struct sctp_assoc_value *params,
|
|
unsigned int optlen)
|
|
{
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
struct sctp_association *asoc;
|
|
sctp_assoc_t assoc_id;
|
|
int val;
|
|
|
|
if (optlen == sizeof(int)) {
|
|
pr_warn_ratelimited(DEPRECATED
|
|
"%s (pid %d) "
|
|
"Use of int in maxseg socket option.\n"
|
|
"Use struct sctp_assoc_value instead\n",
|
|
current->comm, task_pid_nr(current));
|
|
assoc_id = SCTP_FUTURE_ASSOC;
|
|
val = *(int *)params;
|
|
} else if (optlen == sizeof(struct sctp_assoc_value)) {
|
|
assoc_id = params->assoc_id;
|
|
val = params->assoc_value;
|
|
} else {
|
|
return -EINVAL;
|
|
}
|
|
|
|
asoc = sctp_id2assoc(sk, assoc_id);
|
|
if (!asoc && assoc_id != SCTP_FUTURE_ASSOC &&
|
|
sctp_style(sk, UDP))
|
|
return -EINVAL;
|
|
|
|
if (val) {
|
|
int min_len, max_len;
|
|
__u16 datasize = asoc ? sctp_datachk_len(&asoc->stream) :
|
|
sizeof(struct sctp_data_chunk);
|
|
|
|
min_len = sctp_min_frag_point(sp, datasize);
|
|
max_len = SCTP_MAX_CHUNK_LEN - datasize;
|
|
|
|
if (val < min_len || val > max_len)
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (asoc) {
|
|
asoc->user_frag = val;
|
|
sctp_assoc_update_frag_point(asoc);
|
|
} else {
|
|
sp->user_frag = val;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* 7.1.9 Set Peer Primary Address (SCTP_SET_PEER_PRIMARY_ADDR)
|
|
*
|
|
* Requests that the peer mark the enclosed address as the association
|
|
* primary. The enclosed address must be one of the association's
|
|
* locally bound addresses. The following structure is used to make a
|
|
* set primary request:
|
|
*/
|
|
static int sctp_setsockopt_peer_primary_addr(struct sock *sk,
|
|
struct sctp_setpeerprim *prim,
|
|
unsigned int optlen)
|
|
{
|
|
struct sctp_sock *sp;
|
|
struct sctp_association *asoc = NULL;
|
|
struct sctp_chunk *chunk;
|
|
struct sctp_af *af;
|
|
int err;
|
|
|
|
sp = sctp_sk(sk);
|
|
|
|
if (!sp->ep->asconf_enable)
|
|
return -EPERM;
|
|
|
|
if (optlen != sizeof(struct sctp_setpeerprim))
|
|
return -EINVAL;
|
|
|
|
asoc = sctp_id2assoc(sk, prim->sspp_assoc_id);
|
|
if (!asoc)
|
|
return -EINVAL;
|
|
|
|
if (!asoc->peer.asconf_capable)
|
|
return -EPERM;
|
|
|
|
if (asoc->peer.addip_disabled_mask & SCTP_PARAM_SET_PRIMARY)
|
|
return -EPERM;
|
|
|
|
if (!sctp_state(asoc, ESTABLISHED))
|
|
return -ENOTCONN;
|
|
|
|
af = sctp_get_af_specific(prim->sspp_addr.ss_family);
|
|
if (!af)
|
|
return -EINVAL;
|
|
|
|
if (!af->addr_valid((union sctp_addr *)&prim->sspp_addr, sp, NULL))
|
|
return -EADDRNOTAVAIL;
|
|
|
|
if (!sctp_assoc_lookup_laddr(asoc, (union sctp_addr *)&prim->sspp_addr))
|
|
return -EADDRNOTAVAIL;
|
|
|
|
/* Allow security module to validate address. */
|
|
err = security_sctp_bind_connect(sk, SCTP_SET_PEER_PRIMARY_ADDR,
|
|
(struct sockaddr *)&prim->sspp_addr,
|
|
af->sockaddr_len);
|
|
if (err)
|
|
return err;
|
|
|
|
/* Create an ASCONF chunk with SET_PRIMARY parameter */
|
|
chunk = sctp_make_asconf_set_prim(asoc,
|
|
(union sctp_addr *)&prim->sspp_addr);
|
|
if (!chunk)
|
|
return -ENOMEM;
|
|
|
|
err = sctp_send_asconf(asoc, chunk);
|
|
|
|
pr_debug("%s: we set peer primary addr primitively\n", __func__);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int sctp_setsockopt_adaptation_layer(struct sock *sk,
|
|
struct sctp_setadaptation *adapt,
|
|
unsigned int optlen)
|
|
{
|
|
if (optlen != sizeof(struct sctp_setadaptation))
|
|
return -EINVAL;
|
|
|
|
sctp_sk(sk)->adaptation_ind = adapt->ssb_adaptation_ind;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 7.1.29. Set or Get the default context (SCTP_CONTEXT)
|
|
*
|
|
* The context field in the sctp_sndrcvinfo structure is normally only
|
|
* used when a failed message is retrieved holding the value that was
|
|
* sent down on the actual send call. This option allows the setting of
|
|
* a default context on an association basis that will be received on
|
|
* reading messages from the peer. This is especially helpful in the
|
|
* one-2-many model for an application to keep some reference to an
|
|
* internal state machine that is processing messages on the
|
|
* association. Note that the setting of this value only effects
|
|
* received messages from the peer and does not effect the value that is
|
|
* saved with outbound messages.
|
|
*/
|
|
static int sctp_setsockopt_context(struct sock *sk,
|
|
struct sctp_assoc_value *params,
|
|
unsigned int optlen)
|
|
{
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
struct sctp_association *asoc;
|
|
|
|
if (optlen != sizeof(struct sctp_assoc_value))
|
|
return -EINVAL;
|
|
|
|
asoc = sctp_id2assoc(sk, params->assoc_id);
|
|
if (!asoc && params->assoc_id > SCTP_ALL_ASSOC &&
|
|
sctp_style(sk, UDP))
|
|
return -EINVAL;
|
|
|
|
if (asoc) {
|
|
asoc->default_rcv_context = params->assoc_value;
|
|
|
|
return 0;
|
|
}
|
|
|
|
if (sctp_style(sk, TCP))
|
|
params->assoc_id = SCTP_FUTURE_ASSOC;
|
|
|
|
if (params->assoc_id == SCTP_FUTURE_ASSOC ||
|
|
params->assoc_id == SCTP_ALL_ASSOC)
|
|
sp->default_rcv_context = params->assoc_value;
|
|
|
|
if (params->assoc_id == SCTP_CURRENT_ASSOC ||
|
|
params->assoc_id == SCTP_ALL_ASSOC)
|
|
list_for_each_entry(asoc, &sp->ep->asocs, asocs)
|
|
asoc->default_rcv_context = params->assoc_value;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 7.1.24. Get or set fragmented interleave (SCTP_FRAGMENT_INTERLEAVE)
|
|
*
|
|
* This options will at a minimum specify if the implementation is doing
|
|
* fragmented interleave. Fragmented interleave, for a one to many
|
|
* socket, is when subsequent calls to receive a message may return
|
|
* parts of messages from different associations. Some implementations
|
|
* may allow you to turn this value on or off. If so, when turned off,
|
|
* no fragment interleave will occur (which will cause a head of line
|
|
* blocking amongst multiple associations sharing the same one to many
|
|
* socket). When this option is turned on, then each receive call may
|
|
* come from a different association (thus the user must receive data
|
|
* with the extended calls (e.g. sctp_recvmsg) to keep track of which
|
|
* association each receive belongs to.
|
|
*
|
|
* This option takes a boolean value. A non-zero value indicates that
|
|
* fragmented interleave is on. A value of zero indicates that
|
|
* fragmented interleave is off.
|
|
*
|
|
* Note that it is important that an implementation that allows this
|
|
* option to be turned on, have it off by default. Otherwise an unaware
|
|
* application using the one to many model may become confused and act
|
|
* incorrectly.
|
|
*/
|
|
static int sctp_setsockopt_fragment_interleave(struct sock *sk, int *val,
|
|
unsigned int optlen)
|
|
{
|
|
if (optlen != sizeof(int))
|
|
return -EINVAL;
|
|
|
|
sctp_sk(sk)->frag_interleave = !!*val;
|
|
|
|
if (!sctp_sk(sk)->frag_interleave)
|
|
sctp_sk(sk)->ep->intl_enable = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 8.1.21. Set or Get the SCTP Partial Delivery Point
|
|
* (SCTP_PARTIAL_DELIVERY_POINT)
|
|
*
|
|
* This option will set or get the SCTP partial delivery point. This
|
|
* point is the size of a message where the partial delivery API will be
|
|
* invoked to help free up rwnd space for the peer. Setting this to a
|
|
* lower value will cause partial deliveries to happen more often. The
|
|
* calls argument is an integer that sets or gets the partial delivery
|
|
* point. Note also that the call will fail if the user attempts to set
|
|
* this value larger than the socket receive buffer size.
|
|
*
|
|
* Note that any single message having a length smaller than or equal to
|
|
* the SCTP partial delivery point will be delivered in one single read
|
|
* call as long as the user provided buffer is large enough to hold the
|
|
* message.
|
|
*/
|
|
static int sctp_setsockopt_partial_delivery_point(struct sock *sk, u32 *val,
|
|
unsigned int optlen)
|
|
{
|
|
if (optlen != sizeof(u32))
|
|
return -EINVAL;
|
|
|
|
/* Note: We double the receive buffer from what the user sets
|
|
* it to be, also initial rwnd is based on rcvbuf/2.
|
|
*/
|
|
if (*val > (sk->sk_rcvbuf >> 1))
|
|
return -EINVAL;
|
|
|
|
sctp_sk(sk)->pd_point = *val;
|
|
|
|
return 0; /* is this the right error code? */
|
|
}
|
|
|
|
/*
|
|
* 7.1.28. Set or Get the maximum burst (SCTP_MAX_BURST)
|
|
*
|
|
* This option will allow a user to change the maximum burst of packets
|
|
* that can be emitted by this association. Note that the default value
|
|
* is 4, and some implementations may restrict this setting so that it
|
|
* can only be lowered.
|
|
*
|
|
* NOTE: This text doesn't seem right. Do this on a socket basis with
|
|
* future associations inheriting the socket value.
|
|
*/
|
|
static int sctp_setsockopt_maxburst(struct sock *sk,
|
|
struct sctp_assoc_value *params,
|
|
unsigned int optlen)
|
|
{
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
struct sctp_association *asoc;
|
|
sctp_assoc_t assoc_id;
|
|
u32 assoc_value;
|
|
|
|
if (optlen == sizeof(int)) {
|
|
pr_warn_ratelimited(DEPRECATED
|
|
"%s (pid %d) "
|
|
"Use of int in max_burst socket option deprecated.\n"
|
|
"Use struct sctp_assoc_value instead\n",
|
|
current->comm, task_pid_nr(current));
|
|
assoc_id = SCTP_FUTURE_ASSOC;
|
|
assoc_value = *((int *)params);
|
|
} else if (optlen == sizeof(struct sctp_assoc_value)) {
|
|
assoc_id = params->assoc_id;
|
|
assoc_value = params->assoc_value;
|
|
} else
|
|
return -EINVAL;
|
|
|
|
asoc = sctp_id2assoc(sk, assoc_id);
|
|
if (!asoc && assoc_id > SCTP_ALL_ASSOC && sctp_style(sk, UDP))
|
|
return -EINVAL;
|
|
|
|
if (asoc) {
|
|
asoc->max_burst = assoc_value;
|
|
|
|
return 0;
|
|
}
|
|
|
|
if (sctp_style(sk, TCP))
|
|
assoc_id = SCTP_FUTURE_ASSOC;
|
|
|
|
if (assoc_id == SCTP_FUTURE_ASSOC || assoc_id == SCTP_ALL_ASSOC)
|
|
sp->max_burst = assoc_value;
|
|
|
|
if (assoc_id == SCTP_CURRENT_ASSOC || assoc_id == SCTP_ALL_ASSOC)
|
|
list_for_each_entry(asoc, &sp->ep->asocs, asocs)
|
|
asoc->max_burst = assoc_value;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 7.1.18. Add a chunk that must be authenticated (SCTP_AUTH_CHUNK)
|
|
*
|
|
* This set option adds a chunk type that the user is requesting to be
|
|
* received only in an authenticated way. Changes to the list of chunks
|
|
* will only effect future associations on the socket.
|
|
*/
|
|
static int sctp_setsockopt_auth_chunk(struct sock *sk,
|
|
struct sctp_authchunk *val,
|
|
unsigned int optlen)
|
|
{
|
|
struct sctp_endpoint *ep = sctp_sk(sk)->ep;
|
|
|
|
if (!ep->auth_enable)
|
|
return -EACCES;
|
|
|
|
if (optlen != sizeof(struct sctp_authchunk))
|
|
return -EINVAL;
|
|
|
|
switch (val->sauth_chunk) {
|
|
case SCTP_CID_INIT:
|
|
case SCTP_CID_INIT_ACK:
|
|
case SCTP_CID_SHUTDOWN_COMPLETE:
|
|
case SCTP_CID_AUTH:
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* add this chunk id to the endpoint */
|
|
return sctp_auth_ep_add_chunkid(ep, val->sauth_chunk);
|
|
}
|
|
|
|
/*
|
|
* 7.1.19. Get or set the list of supported HMAC Identifiers (SCTP_HMAC_IDENT)
|
|
*
|
|
* This option gets or sets the list of HMAC algorithms that the local
|
|
* endpoint requires the peer to use.
|
|
*/
|
|
static int sctp_setsockopt_hmac_ident(struct sock *sk,
|
|
struct sctp_hmacalgo *hmacs,
|
|
unsigned int optlen)
|
|
{
|
|
struct sctp_endpoint *ep = sctp_sk(sk)->ep;
|
|
u32 idents;
|
|
|
|
if (!ep->auth_enable)
|
|
return -EACCES;
|
|
|
|
if (optlen < sizeof(struct sctp_hmacalgo))
|
|
return -EINVAL;
|
|
optlen = min_t(unsigned int, optlen, sizeof(struct sctp_hmacalgo) +
|
|
SCTP_AUTH_NUM_HMACS * sizeof(u16));
|
|
|
|
idents = hmacs->shmac_num_idents;
|
|
if (idents == 0 || idents > SCTP_AUTH_NUM_HMACS ||
|
|
(idents * sizeof(u16)) > (optlen - sizeof(struct sctp_hmacalgo)))
|
|
return -EINVAL;
|
|
|
|
return sctp_auth_ep_set_hmacs(ep, hmacs);
|
|
}
|
|
|
|
/*
|
|
* 7.1.20. Set a shared key (SCTP_AUTH_KEY)
|
|
*
|
|
* This option will set a shared secret key which is used to build an
|
|
* association shared key.
|
|
*/
|
|
static int sctp_setsockopt_auth_key(struct sock *sk,
|
|
struct sctp_authkey *authkey,
|
|
unsigned int optlen)
|
|
{
|
|
struct sctp_endpoint *ep = sctp_sk(sk)->ep;
|
|
struct sctp_association *asoc;
|
|
int ret = -EINVAL;
|
|
|
|
if (optlen <= sizeof(struct sctp_authkey))
|
|
return -EINVAL;
|
|
/* authkey->sca_keylength is u16, so optlen can't be bigger than
|
|
* this.
|
|
*/
|
|
optlen = min_t(unsigned int, optlen, USHRT_MAX + sizeof(*authkey));
|
|
|
|
if (authkey->sca_keylength > optlen - sizeof(*authkey))
|
|
goto out;
|
|
|
|
asoc = sctp_id2assoc(sk, authkey->sca_assoc_id);
|
|
if (!asoc && authkey->sca_assoc_id > SCTP_ALL_ASSOC &&
|
|
sctp_style(sk, UDP))
|
|
goto out;
|
|
|
|
if (asoc) {
|
|
ret = sctp_auth_set_key(ep, asoc, authkey);
|
|
goto out;
|
|
}
|
|
|
|
if (sctp_style(sk, TCP))
|
|
authkey->sca_assoc_id = SCTP_FUTURE_ASSOC;
|
|
|
|
if (authkey->sca_assoc_id == SCTP_FUTURE_ASSOC ||
|
|
authkey->sca_assoc_id == SCTP_ALL_ASSOC) {
|
|
ret = sctp_auth_set_key(ep, asoc, authkey);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
|
|
ret = 0;
|
|
|
|
if (authkey->sca_assoc_id == SCTP_CURRENT_ASSOC ||
|
|
authkey->sca_assoc_id == SCTP_ALL_ASSOC) {
|
|
list_for_each_entry(asoc, &ep->asocs, asocs) {
|
|
int res = sctp_auth_set_key(ep, asoc, authkey);
|
|
|
|
if (res && !ret)
|
|
ret = res;
|
|
}
|
|
}
|
|
|
|
out:
|
|
memzero_explicit(authkey, optlen);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* 7.1.21. Get or set the active shared key (SCTP_AUTH_ACTIVE_KEY)
|
|
*
|
|
* This option will get or set the active shared key to be used to build
|
|
* the association shared key.
|
|
*/
|
|
static int sctp_setsockopt_active_key(struct sock *sk,
|
|
struct sctp_authkeyid *val,
|
|
unsigned int optlen)
|
|
{
|
|
struct sctp_endpoint *ep = sctp_sk(sk)->ep;
|
|
struct sctp_association *asoc;
|
|
int ret = 0;
|
|
|
|
if (optlen != sizeof(struct sctp_authkeyid))
|
|
return -EINVAL;
|
|
|
|
asoc = sctp_id2assoc(sk, val->scact_assoc_id);
|
|
if (!asoc && val->scact_assoc_id > SCTP_ALL_ASSOC &&
|
|
sctp_style(sk, UDP))
|
|
return -EINVAL;
|
|
|
|
if (asoc)
|
|
return sctp_auth_set_active_key(ep, asoc, val->scact_keynumber);
|
|
|
|
if (sctp_style(sk, TCP))
|
|
val->scact_assoc_id = SCTP_FUTURE_ASSOC;
|
|
|
|
if (val->scact_assoc_id == SCTP_FUTURE_ASSOC ||
|
|
val->scact_assoc_id == SCTP_ALL_ASSOC) {
|
|
ret = sctp_auth_set_active_key(ep, asoc, val->scact_keynumber);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
if (val->scact_assoc_id == SCTP_CURRENT_ASSOC ||
|
|
val->scact_assoc_id == SCTP_ALL_ASSOC) {
|
|
list_for_each_entry(asoc, &ep->asocs, asocs) {
|
|
int res = sctp_auth_set_active_key(ep, asoc,
|
|
val->scact_keynumber);
|
|
|
|
if (res && !ret)
|
|
ret = res;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* 7.1.22. Delete a shared key (SCTP_AUTH_DELETE_KEY)
|
|
*
|
|
* This set option will delete a shared secret key from use.
|
|
*/
|
|
static int sctp_setsockopt_del_key(struct sock *sk,
|
|
struct sctp_authkeyid *val,
|
|
unsigned int optlen)
|
|
{
|
|
struct sctp_endpoint *ep = sctp_sk(sk)->ep;
|
|
struct sctp_association *asoc;
|
|
int ret = 0;
|
|
|
|
if (optlen != sizeof(struct sctp_authkeyid))
|
|
return -EINVAL;
|
|
|
|
asoc = sctp_id2assoc(sk, val->scact_assoc_id);
|
|
if (!asoc && val->scact_assoc_id > SCTP_ALL_ASSOC &&
|
|
sctp_style(sk, UDP))
|
|
return -EINVAL;
|
|
|
|
if (asoc)
|
|
return sctp_auth_del_key_id(ep, asoc, val->scact_keynumber);
|
|
|
|
if (sctp_style(sk, TCP))
|
|
val->scact_assoc_id = SCTP_FUTURE_ASSOC;
|
|
|
|
if (val->scact_assoc_id == SCTP_FUTURE_ASSOC ||
|
|
val->scact_assoc_id == SCTP_ALL_ASSOC) {
|
|
ret = sctp_auth_del_key_id(ep, asoc, val->scact_keynumber);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
if (val->scact_assoc_id == SCTP_CURRENT_ASSOC ||
|
|
val->scact_assoc_id == SCTP_ALL_ASSOC) {
|
|
list_for_each_entry(asoc, &ep->asocs, asocs) {
|
|
int res = sctp_auth_del_key_id(ep, asoc,
|
|
val->scact_keynumber);
|
|
|
|
if (res && !ret)
|
|
ret = res;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* 8.3.4 Deactivate a Shared Key (SCTP_AUTH_DEACTIVATE_KEY)
|
|
*
|
|
* This set option will deactivate a shared secret key.
|
|
*/
|
|
static int sctp_setsockopt_deactivate_key(struct sock *sk,
|
|
struct sctp_authkeyid *val,
|
|
unsigned int optlen)
|
|
{
|
|
struct sctp_endpoint *ep = sctp_sk(sk)->ep;
|
|
struct sctp_association *asoc;
|
|
int ret = 0;
|
|
|
|
if (optlen != sizeof(struct sctp_authkeyid))
|
|
return -EINVAL;
|
|
|
|
asoc = sctp_id2assoc(sk, val->scact_assoc_id);
|
|
if (!asoc && val->scact_assoc_id > SCTP_ALL_ASSOC &&
|
|
sctp_style(sk, UDP))
|
|
return -EINVAL;
|
|
|
|
if (asoc)
|
|
return sctp_auth_deact_key_id(ep, asoc, val->scact_keynumber);
|
|
|
|
if (sctp_style(sk, TCP))
|
|
val->scact_assoc_id = SCTP_FUTURE_ASSOC;
|
|
|
|
if (val->scact_assoc_id == SCTP_FUTURE_ASSOC ||
|
|
val->scact_assoc_id == SCTP_ALL_ASSOC) {
|
|
ret = sctp_auth_deact_key_id(ep, asoc, val->scact_keynumber);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
if (val->scact_assoc_id == SCTP_CURRENT_ASSOC ||
|
|
val->scact_assoc_id == SCTP_ALL_ASSOC) {
|
|
list_for_each_entry(asoc, &ep->asocs, asocs) {
|
|
int res = sctp_auth_deact_key_id(ep, asoc,
|
|
val->scact_keynumber);
|
|
|
|
if (res && !ret)
|
|
ret = res;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* 8.1.23 SCTP_AUTO_ASCONF
|
|
*
|
|
* This option will enable or disable the use of the automatic generation of
|
|
* ASCONF chunks to add and delete addresses to an existing association. Note
|
|
* that this option has two caveats namely: a) it only affects sockets that
|
|
* are bound to all addresses available to the SCTP stack, and b) the system
|
|
* administrator may have an overriding control that turns the ASCONF feature
|
|
* off no matter what setting the socket option may have.
|
|
* This option expects an integer boolean flag, where a non-zero value turns on
|
|
* the option, and a zero value turns off the option.
|
|
* Note. In this implementation, socket operation overrides default parameter
|
|
* being set by sysctl as well as FreeBSD implementation
|
|
*/
|
|
static int sctp_setsockopt_auto_asconf(struct sock *sk, int *val,
|
|
unsigned int optlen)
|
|
{
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
|
|
if (optlen < sizeof(int))
|
|
return -EINVAL;
|
|
if (!sctp_is_ep_boundall(sk) && *val)
|
|
return -EINVAL;
|
|
if ((*val && sp->do_auto_asconf) || (!*val && !sp->do_auto_asconf))
|
|
return 0;
|
|
|
|
spin_lock_bh(&sock_net(sk)->sctp.addr_wq_lock);
|
|
if (*val == 0 && sp->do_auto_asconf) {
|
|
list_del(&sp->auto_asconf_list);
|
|
sp->do_auto_asconf = 0;
|
|
} else if (*val && !sp->do_auto_asconf) {
|
|
list_add_tail(&sp->auto_asconf_list,
|
|
&sock_net(sk)->sctp.auto_asconf_splist);
|
|
sp->do_auto_asconf = 1;
|
|
}
|
|
spin_unlock_bh(&sock_net(sk)->sctp.addr_wq_lock);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* SCTP_PEER_ADDR_THLDS
|
|
*
|
|
* This option allows us to alter the partially failed threshold for one or all
|
|
* transports in an association. See Section 6.1 of:
|
|
* http://www.ietf.org/id/draft-nishida-tsvwg-sctp-failover-05.txt
|
|
*/
|
|
static int sctp_setsockopt_paddr_thresholds(struct sock *sk,
|
|
struct sctp_paddrthlds_v2 *val,
|
|
unsigned int optlen, bool v2)
|
|
{
|
|
struct sctp_transport *trans;
|
|
struct sctp_association *asoc;
|
|
int len;
|
|
|
|
len = v2 ? sizeof(*val) : sizeof(struct sctp_paddrthlds);
|
|
if (optlen < len)
|
|
return -EINVAL;
|
|
|
|
if (v2 && val->spt_pathpfthld > val->spt_pathcpthld)
|
|
return -EINVAL;
|
|
|
|
if (!sctp_is_any(sk, (const union sctp_addr *)&val->spt_address)) {
|
|
trans = sctp_addr_id2transport(sk, &val->spt_address,
|
|
val->spt_assoc_id);
|
|
if (!trans)
|
|
return -ENOENT;
|
|
|
|
if (val->spt_pathmaxrxt)
|
|
trans->pathmaxrxt = val->spt_pathmaxrxt;
|
|
if (v2)
|
|
trans->ps_retrans = val->spt_pathcpthld;
|
|
trans->pf_retrans = val->spt_pathpfthld;
|
|
|
|
return 0;
|
|
}
|
|
|
|
asoc = sctp_id2assoc(sk, val->spt_assoc_id);
|
|
if (!asoc && val->spt_assoc_id != SCTP_FUTURE_ASSOC &&
|
|
sctp_style(sk, UDP))
|
|
return -EINVAL;
|
|
|
|
if (asoc) {
|
|
list_for_each_entry(trans, &asoc->peer.transport_addr_list,
|
|
transports) {
|
|
if (val->spt_pathmaxrxt)
|
|
trans->pathmaxrxt = val->spt_pathmaxrxt;
|
|
if (v2)
|
|
trans->ps_retrans = val->spt_pathcpthld;
|
|
trans->pf_retrans = val->spt_pathpfthld;
|
|
}
|
|
|
|
if (val->spt_pathmaxrxt)
|
|
asoc->pathmaxrxt = val->spt_pathmaxrxt;
|
|
if (v2)
|
|
asoc->ps_retrans = val->spt_pathcpthld;
|
|
asoc->pf_retrans = val->spt_pathpfthld;
|
|
} else {
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
|
|
if (val->spt_pathmaxrxt)
|
|
sp->pathmaxrxt = val->spt_pathmaxrxt;
|
|
if (v2)
|
|
sp->ps_retrans = val->spt_pathcpthld;
|
|
sp->pf_retrans = val->spt_pathpfthld;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sctp_setsockopt_recvrcvinfo(struct sock *sk, int *val,
|
|
unsigned int optlen)
|
|
{
|
|
if (optlen < sizeof(int))
|
|
return -EINVAL;
|
|
|
|
sctp_sk(sk)->recvrcvinfo = (*val == 0) ? 0 : 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sctp_setsockopt_recvnxtinfo(struct sock *sk, int *val,
|
|
unsigned int optlen)
|
|
{
|
|
if (optlen < sizeof(int))
|
|
return -EINVAL;
|
|
|
|
sctp_sk(sk)->recvnxtinfo = (*val == 0) ? 0 : 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sctp_setsockopt_pr_supported(struct sock *sk,
|
|
struct sctp_assoc_value *params,
|
|
unsigned int optlen)
|
|
{
|
|
struct sctp_association *asoc;
|
|
|
|
if (optlen != sizeof(*params))
|
|
return -EINVAL;
|
|
|
|
asoc = sctp_id2assoc(sk, params->assoc_id);
|
|
if (!asoc && params->assoc_id != SCTP_FUTURE_ASSOC &&
|
|
sctp_style(sk, UDP))
|
|
return -EINVAL;
|
|
|
|
sctp_sk(sk)->ep->prsctp_enable = !!params->assoc_value;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sctp_setsockopt_default_prinfo(struct sock *sk,
|
|
struct sctp_default_prinfo *info,
|
|
unsigned int optlen)
|
|
{
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
struct sctp_association *asoc;
|
|
int retval = -EINVAL;
|
|
|
|
if (optlen != sizeof(*info))
|
|
goto out;
|
|
|
|
if (info->pr_policy & ~SCTP_PR_SCTP_MASK)
|
|
goto out;
|
|
|
|
if (info->pr_policy == SCTP_PR_SCTP_NONE)
|
|
info->pr_value = 0;
|
|
|
|
asoc = sctp_id2assoc(sk, info->pr_assoc_id);
|
|
if (!asoc && info->pr_assoc_id > SCTP_ALL_ASSOC &&
|
|
sctp_style(sk, UDP))
|
|
goto out;
|
|
|
|
retval = 0;
|
|
|
|
if (asoc) {
|
|
SCTP_PR_SET_POLICY(asoc->default_flags, info->pr_policy);
|
|
asoc->default_timetolive = info->pr_value;
|
|
goto out;
|
|
}
|
|
|
|
if (sctp_style(sk, TCP))
|
|
info->pr_assoc_id = SCTP_FUTURE_ASSOC;
|
|
|
|
if (info->pr_assoc_id == SCTP_FUTURE_ASSOC ||
|
|
info->pr_assoc_id == SCTP_ALL_ASSOC) {
|
|
SCTP_PR_SET_POLICY(sp->default_flags, info->pr_policy);
|
|
sp->default_timetolive = info->pr_value;
|
|
}
|
|
|
|
if (info->pr_assoc_id == SCTP_CURRENT_ASSOC ||
|
|
info->pr_assoc_id == SCTP_ALL_ASSOC) {
|
|
list_for_each_entry(asoc, &sp->ep->asocs, asocs) {
|
|
SCTP_PR_SET_POLICY(asoc->default_flags,
|
|
info->pr_policy);
|
|
asoc->default_timetolive = info->pr_value;
|
|
}
|
|
}
|
|
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
static int sctp_setsockopt_reconfig_supported(struct sock *sk,
|
|
struct sctp_assoc_value *params,
|
|
unsigned int optlen)
|
|
{
|
|
struct sctp_association *asoc;
|
|
int retval = -EINVAL;
|
|
|
|
if (optlen != sizeof(*params))
|
|
goto out;
|
|
|
|
asoc = sctp_id2assoc(sk, params->assoc_id);
|
|
if (!asoc && params->assoc_id != SCTP_FUTURE_ASSOC &&
|
|
sctp_style(sk, UDP))
|
|
goto out;
|
|
|
|
sctp_sk(sk)->ep->reconf_enable = !!params->assoc_value;
|
|
|
|
retval = 0;
|
|
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
static int sctp_setsockopt_enable_strreset(struct sock *sk,
|
|
struct sctp_assoc_value *params,
|
|
unsigned int optlen)
|
|
{
|
|
struct sctp_endpoint *ep = sctp_sk(sk)->ep;
|
|
struct sctp_association *asoc;
|
|
int retval = -EINVAL;
|
|
|
|
if (optlen != sizeof(*params))
|
|
goto out;
|
|
|
|
if (params->assoc_value & (~SCTP_ENABLE_STRRESET_MASK))
|
|
goto out;
|
|
|
|
asoc = sctp_id2assoc(sk, params->assoc_id);
|
|
if (!asoc && params->assoc_id > SCTP_ALL_ASSOC &&
|
|
sctp_style(sk, UDP))
|
|
goto out;
|
|
|
|
retval = 0;
|
|
|
|
if (asoc) {
|
|
asoc->strreset_enable = params->assoc_value;
|
|
goto out;
|
|
}
|
|
|
|
if (sctp_style(sk, TCP))
|
|
params->assoc_id = SCTP_FUTURE_ASSOC;
|
|
|
|
if (params->assoc_id == SCTP_FUTURE_ASSOC ||
|
|
params->assoc_id == SCTP_ALL_ASSOC)
|
|
ep->strreset_enable = params->assoc_value;
|
|
|
|
if (params->assoc_id == SCTP_CURRENT_ASSOC ||
|
|
params->assoc_id == SCTP_ALL_ASSOC)
|
|
list_for_each_entry(asoc, &ep->asocs, asocs)
|
|
asoc->strreset_enable = params->assoc_value;
|
|
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
static int sctp_setsockopt_reset_streams(struct sock *sk,
|
|
struct sctp_reset_streams *params,
|
|
unsigned int optlen)
|
|
{
|
|
struct sctp_association *asoc;
|
|
|
|
if (optlen < sizeof(*params))
|
|
return -EINVAL;
|
|
/* srs_number_streams is u16, so optlen can't be bigger than this. */
|
|
optlen = min_t(unsigned int, optlen, USHRT_MAX +
|
|
sizeof(__u16) * sizeof(*params));
|
|
|
|
if (params->srs_number_streams * sizeof(__u16) >
|
|
optlen - sizeof(*params))
|
|
return -EINVAL;
|
|
|
|
asoc = sctp_id2assoc(sk, params->srs_assoc_id);
|
|
if (!asoc)
|
|
return -EINVAL;
|
|
|
|
return sctp_send_reset_streams(asoc, params);
|
|
}
|
|
|
|
static int sctp_setsockopt_reset_assoc(struct sock *sk, sctp_assoc_t *associd,
|
|
unsigned int optlen)
|
|
{
|
|
struct sctp_association *asoc;
|
|
|
|
if (optlen != sizeof(*associd))
|
|
return -EINVAL;
|
|
|
|
asoc = sctp_id2assoc(sk, *associd);
|
|
if (!asoc)
|
|
return -EINVAL;
|
|
|
|
return sctp_send_reset_assoc(asoc);
|
|
}
|
|
|
|
static int sctp_setsockopt_add_streams(struct sock *sk,
|
|
struct sctp_add_streams *params,
|
|
unsigned int optlen)
|
|
{
|
|
struct sctp_association *asoc;
|
|
|
|
if (optlen != sizeof(*params))
|
|
return -EINVAL;
|
|
|
|
asoc = sctp_id2assoc(sk, params->sas_assoc_id);
|
|
if (!asoc)
|
|
return -EINVAL;
|
|
|
|
return sctp_send_add_streams(asoc, params);
|
|
}
|
|
|
|
static int sctp_setsockopt_scheduler(struct sock *sk,
|
|
struct sctp_assoc_value *params,
|
|
unsigned int optlen)
|
|
{
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
struct sctp_association *asoc;
|
|
int retval = 0;
|
|
|
|
if (optlen < sizeof(*params))
|
|
return -EINVAL;
|
|
|
|
if (params->assoc_value > SCTP_SS_MAX)
|
|
return -EINVAL;
|
|
|
|
asoc = sctp_id2assoc(sk, params->assoc_id);
|
|
if (!asoc && params->assoc_id > SCTP_ALL_ASSOC &&
|
|
sctp_style(sk, UDP))
|
|
return -EINVAL;
|
|
|
|
if (asoc)
|
|
return sctp_sched_set_sched(asoc, params->assoc_value);
|
|
|
|
if (sctp_style(sk, TCP))
|
|
params->assoc_id = SCTP_FUTURE_ASSOC;
|
|
|
|
if (params->assoc_id == SCTP_FUTURE_ASSOC ||
|
|
params->assoc_id == SCTP_ALL_ASSOC)
|
|
sp->default_ss = params->assoc_value;
|
|
|
|
if (params->assoc_id == SCTP_CURRENT_ASSOC ||
|
|
params->assoc_id == SCTP_ALL_ASSOC) {
|
|
list_for_each_entry(asoc, &sp->ep->asocs, asocs) {
|
|
int ret = sctp_sched_set_sched(asoc,
|
|
params->assoc_value);
|
|
|
|
if (ret && !retval)
|
|
retval = ret;
|
|
}
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
|
|
static int sctp_setsockopt_scheduler_value(struct sock *sk,
|
|
struct sctp_stream_value *params,
|
|
unsigned int optlen)
|
|
{
|
|
struct sctp_association *asoc;
|
|
int retval = -EINVAL;
|
|
|
|
if (optlen < sizeof(*params))
|
|
goto out;
|
|
|
|
asoc = sctp_id2assoc(sk, params->assoc_id);
|
|
if (!asoc && params->assoc_id != SCTP_CURRENT_ASSOC &&
|
|
sctp_style(sk, UDP))
|
|
goto out;
|
|
|
|
if (asoc) {
|
|
retval = sctp_sched_set_value(asoc, params->stream_id,
|
|
params->stream_value, GFP_KERNEL);
|
|
goto out;
|
|
}
|
|
|
|
retval = 0;
|
|
|
|
list_for_each_entry(asoc, &sctp_sk(sk)->ep->asocs, asocs) {
|
|
int ret = sctp_sched_set_value(asoc, params->stream_id,
|
|
params->stream_value,
|
|
GFP_KERNEL);
|
|
if (ret && !retval) /* try to return the 1st error. */
|
|
retval = ret;
|
|
}
|
|
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
static int sctp_setsockopt_interleaving_supported(struct sock *sk,
|
|
struct sctp_assoc_value *p,
|
|
unsigned int optlen)
|
|
{
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
struct sctp_association *asoc;
|
|
|
|
if (optlen < sizeof(*p))
|
|
return -EINVAL;
|
|
|
|
asoc = sctp_id2assoc(sk, p->assoc_id);
|
|
if (!asoc && p->assoc_id != SCTP_FUTURE_ASSOC && sctp_style(sk, UDP))
|
|
return -EINVAL;
|
|
|
|
if (!sock_net(sk)->sctp.intl_enable || !sp->frag_interleave) {
|
|
return -EPERM;
|
|
}
|
|
|
|
sp->ep->intl_enable = !!p->assoc_value;
|
|
return 0;
|
|
}
|
|
|
|
static int sctp_setsockopt_reuse_port(struct sock *sk, int *val,
|
|
unsigned int optlen)
|
|
{
|
|
if (!sctp_style(sk, TCP))
|
|
return -EOPNOTSUPP;
|
|
|
|
if (sctp_sk(sk)->ep->base.bind_addr.port)
|
|
return -EFAULT;
|
|
|
|
if (optlen < sizeof(int))
|
|
return -EINVAL;
|
|
|
|
sctp_sk(sk)->reuse = !!*val;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sctp_assoc_ulpevent_type_set(struct sctp_event *param,
|
|
struct sctp_association *asoc)
|
|
{
|
|
struct sctp_ulpevent *event;
|
|
|
|
sctp_ulpevent_type_set(&asoc->subscribe, param->se_type, param->se_on);
|
|
|
|
if (param->se_type == SCTP_SENDER_DRY_EVENT && param->se_on) {
|
|
if (sctp_outq_is_empty(&asoc->outqueue)) {
|
|
event = sctp_ulpevent_make_sender_dry_event(asoc,
|
|
GFP_USER | __GFP_NOWARN);
|
|
if (!event)
|
|
return -ENOMEM;
|
|
|
|
asoc->stream.si->enqueue_event(&asoc->ulpq, event);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sctp_setsockopt_event(struct sock *sk, struct sctp_event *param,
|
|
unsigned int optlen)
|
|
{
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
struct sctp_association *asoc;
|
|
int retval = 0;
|
|
|
|
if (optlen < sizeof(*param))
|
|
return -EINVAL;
|
|
|
|
if (param->se_type < SCTP_SN_TYPE_BASE ||
|
|
param->se_type > SCTP_SN_TYPE_MAX)
|
|
return -EINVAL;
|
|
|
|
asoc = sctp_id2assoc(sk, param->se_assoc_id);
|
|
if (!asoc && param->se_assoc_id > SCTP_ALL_ASSOC &&
|
|
sctp_style(sk, UDP))
|
|
return -EINVAL;
|
|
|
|
if (asoc)
|
|
return sctp_assoc_ulpevent_type_set(param, asoc);
|
|
|
|
if (sctp_style(sk, TCP))
|
|
param->se_assoc_id = SCTP_FUTURE_ASSOC;
|
|
|
|
if (param->se_assoc_id == SCTP_FUTURE_ASSOC ||
|
|
param->se_assoc_id == SCTP_ALL_ASSOC)
|
|
sctp_ulpevent_type_set(&sp->subscribe,
|
|
param->se_type, param->se_on);
|
|
|
|
if (param->se_assoc_id == SCTP_CURRENT_ASSOC ||
|
|
param->se_assoc_id == SCTP_ALL_ASSOC) {
|
|
list_for_each_entry(asoc, &sp->ep->asocs, asocs) {
|
|
int ret = sctp_assoc_ulpevent_type_set(param, asoc);
|
|
|
|
if (ret && !retval)
|
|
retval = ret;
|
|
}
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
|
|
static int sctp_setsockopt_asconf_supported(struct sock *sk,
|
|
struct sctp_assoc_value *params,
|
|
unsigned int optlen)
|
|
{
|
|
struct sctp_association *asoc;
|
|
struct sctp_endpoint *ep;
|
|
int retval = -EINVAL;
|
|
|
|
if (optlen != sizeof(*params))
|
|
goto out;
|
|
|
|
asoc = sctp_id2assoc(sk, params->assoc_id);
|
|
if (!asoc && params->assoc_id != SCTP_FUTURE_ASSOC &&
|
|
sctp_style(sk, UDP))
|
|
goto out;
|
|
|
|
ep = sctp_sk(sk)->ep;
|
|
ep->asconf_enable = !!params->assoc_value;
|
|
|
|
if (ep->asconf_enable && ep->auth_enable) {
|
|
sctp_auth_ep_add_chunkid(ep, SCTP_CID_ASCONF);
|
|
sctp_auth_ep_add_chunkid(ep, SCTP_CID_ASCONF_ACK);
|
|
}
|
|
|
|
retval = 0;
|
|
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
static int sctp_setsockopt_auth_supported(struct sock *sk,
|
|
struct sctp_assoc_value *params,
|
|
unsigned int optlen)
|
|
{
|
|
struct sctp_association *asoc;
|
|
struct sctp_endpoint *ep;
|
|
int retval = -EINVAL;
|
|
|
|
if (optlen != sizeof(*params))
|
|
goto out;
|
|
|
|
asoc = sctp_id2assoc(sk, params->assoc_id);
|
|
if (!asoc && params->assoc_id != SCTP_FUTURE_ASSOC &&
|
|
sctp_style(sk, UDP))
|
|
goto out;
|
|
|
|
ep = sctp_sk(sk)->ep;
|
|
if (params->assoc_value) {
|
|
retval = sctp_auth_init(ep, GFP_KERNEL);
|
|
if (retval)
|
|
goto out;
|
|
if (ep->asconf_enable) {
|
|
sctp_auth_ep_add_chunkid(ep, SCTP_CID_ASCONF);
|
|
sctp_auth_ep_add_chunkid(ep, SCTP_CID_ASCONF_ACK);
|
|
}
|
|
}
|
|
|
|
ep->auth_enable = !!params->assoc_value;
|
|
retval = 0;
|
|
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
static int sctp_setsockopt_ecn_supported(struct sock *sk,
|
|
struct sctp_assoc_value *params,
|
|
unsigned int optlen)
|
|
{
|
|
struct sctp_association *asoc;
|
|
int retval = -EINVAL;
|
|
|
|
if (optlen != sizeof(*params))
|
|
goto out;
|
|
|
|
asoc = sctp_id2assoc(sk, params->assoc_id);
|
|
if (!asoc && params->assoc_id != SCTP_FUTURE_ASSOC &&
|
|
sctp_style(sk, UDP))
|
|
goto out;
|
|
|
|
sctp_sk(sk)->ep->ecn_enable = !!params->assoc_value;
|
|
retval = 0;
|
|
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
static int sctp_setsockopt_pf_expose(struct sock *sk,
|
|
struct sctp_assoc_value *params,
|
|
unsigned int optlen)
|
|
{
|
|
struct sctp_association *asoc;
|
|
int retval = -EINVAL;
|
|
|
|
if (optlen != sizeof(*params))
|
|
goto out;
|
|
|
|
if (params->assoc_value > SCTP_PF_EXPOSE_MAX)
|
|
goto out;
|
|
|
|
asoc = sctp_id2assoc(sk, params->assoc_id);
|
|
if (!asoc && params->assoc_id != SCTP_FUTURE_ASSOC &&
|
|
sctp_style(sk, UDP))
|
|
goto out;
|
|
|
|
if (asoc)
|
|
asoc->pf_expose = params->assoc_value;
|
|
else
|
|
sctp_sk(sk)->pf_expose = params->assoc_value;
|
|
retval = 0;
|
|
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
static int sctp_setsockopt_encap_port(struct sock *sk,
|
|
struct sctp_udpencaps *encap,
|
|
unsigned int optlen)
|
|
{
|
|
struct sctp_association *asoc;
|
|
struct sctp_transport *t;
|
|
__be16 encap_port;
|
|
|
|
if (optlen != sizeof(*encap))
|
|
return -EINVAL;
|
|
|
|
/* If an address other than INADDR_ANY is specified, and
|
|
* no transport is found, then the request is invalid.
|
|
*/
|
|
encap_port = (__force __be16)encap->sue_port;
|
|
if (!sctp_is_any(sk, (union sctp_addr *)&encap->sue_address)) {
|
|
t = sctp_addr_id2transport(sk, &encap->sue_address,
|
|
encap->sue_assoc_id);
|
|
if (!t)
|
|
return -EINVAL;
|
|
|
|
t->encap_port = encap_port;
|
|
return 0;
|
|
}
|
|
|
|
/* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the
|
|
* socket is a one to many style socket, and an association
|
|
* was not found, then the id was invalid.
|
|
*/
|
|
asoc = sctp_id2assoc(sk, encap->sue_assoc_id);
|
|
if (!asoc && encap->sue_assoc_id != SCTP_FUTURE_ASSOC &&
|
|
sctp_style(sk, UDP))
|
|
return -EINVAL;
|
|
|
|
/* If changes are for association, also apply encap_port to
|
|
* each transport.
|
|
*/
|
|
if (asoc) {
|
|
list_for_each_entry(t, &asoc->peer.transport_addr_list,
|
|
transports)
|
|
t->encap_port = encap_port;
|
|
|
|
asoc->encap_port = encap_port;
|
|
return 0;
|
|
}
|
|
|
|
sctp_sk(sk)->encap_port = encap_port;
|
|
return 0;
|
|
}
|
|
|
|
static int sctp_setsockopt_probe_interval(struct sock *sk,
|
|
struct sctp_probeinterval *params,
|
|
unsigned int optlen)
|
|
{
|
|
struct sctp_association *asoc;
|
|
struct sctp_transport *t;
|
|
__u32 probe_interval;
|
|
|
|
if (optlen != sizeof(*params))
|
|
return -EINVAL;
|
|
|
|
probe_interval = params->spi_interval;
|
|
if (probe_interval && probe_interval < SCTP_PROBE_TIMER_MIN)
|
|
return -EINVAL;
|
|
|
|
/* If an address other than INADDR_ANY is specified, and
|
|
* no transport is found, then the request is invalid.
|
|
*/
|
|
if (!sctp_is_any(sk, (union sctp_addr *)¶ms->spi_address)) {
|
|
t = sctp_addr_id2transport(sk, ¶ms->spi_address,
|
|
params->spi_assoc_id);
|
|
if (!t)
|
|
return -EINVAL;
|
|
|
|
t->probe_interval = msecs_to_jiffies(probe_interval);
|
|
sctp_transport_pl_reset(t);
|
|
return 0;
|
|
}
|
|
|
|
/* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the
|
|
* socket is a one to many style socket, and an association
|
|
* was not found, then the id was invalid.
|
|
*/
|
|
asoc = sctp_id2assoc(sk, params->spi_assoc_id);
|
|
if (!asoc && params->spi_assoc_id != SCTP_FUTURE_ASSOC &&
|
|
sctp_style(sk, UDP))
|
|
return -EINVAL;
|
|
|
|
/* If changes are for association, also apply probe_interval to
|
|
* each transport.
|
|
*/
|
|
if (asoc) {
|
|
list_for_each_entry(t, &asoc->peer.transport_addr_list, transports) {
|
|
t->probe_interval = msecs_to_jiffies(probe_interval);
|
|
sctp_transport_pl_reset(t);
|
|
}
|
|
|
|
asoc->probe_interval = msecs_to_jiffies(probe_interval);
|
|
return 0;
|
|
}
|
|
|
|
sctp_sk(sk)->probe_interval = probe_interval;
|
|
return 0;
|
|
}
|
|
|
|
/* API 6.2 setsockopt(), getsockopt()
|
|
*
|
|
* Applications use setsockopt() and getsockopt() to set or retrieve
|
|
* socket options. Socket options are used to change the default
|
|
* behavior of sockets calls. They are described in Section 7.
|
|
*
|
|
* The syntax is:
|
|
*
|
|
* ret = getsockopt(int sd, int level, int optname, void __user *optval,
|
|
* int __user *optlen);
|
|
* ret = setsockopt(int sd, int level, int optname, const void __user *optval,
|
|
* int optlen);
|
|
*
|
|
* sd - the socket descript.
|
|
* level - set to IPPROTO_SCTP for all SCTP options.
|
|
* optname - the option name.
|
|
* optval - the buffer to store the value of the option.
|
|
* optlen - the size of the buffer.
|
|
*/
|
|
static int sctp_setsockopt(struct sock *sk, int level, int optname,
|
|
sockptr_t optval, unsigned int optlen)
|
|
{
|
|
void *kopt = NULL;
|
|
int retval = 0;
|
|
|
|
pr_debug("%s: sk:%p, optname:%d\n", __func__, sk, optname);
|
|
|
|
/* I can hardly begin to describe how wrong this is. This is
|
|
* so broken as to be worse than useless. The API draft
|
|
* REALLY is NOT helpful here... I am not convinced that the
|
|
* semantics of setsockopt() with a level OTHER THAN SOL_SCTP
|
|
* are at all well-founded.
|
|
*/
|
|
if (level != SOL_SCTP) {
|
|
struct sctp_af *af = sctp_sk(sk)->pf->af;
|
|
|
|
return af->setsockopt(sk, level, optname, optval, optlen);
|
|
}
|
|
|
|
if (optlen > 0) {
|
|
kopt = memdup_sockptr(optval, optlen);
|
|
if (IS_ERR(kopt))
|
|
return PTR_ERR(kopt);
|
|
}
|
|
|
|
lock_sock(sk);
|
|
|
|
switch (optname) {
|
|
case SCTP_SOCKOPT_BINDX_ADD:
|
|
/* 'optlen' is the size of the addresses buffer. */
|
|
retval = sctp_setsockopt_bindx(sk, kopt, optlen,
|
|
SCTP_BINDX_ADD_ADDR);
|
|
break;
|
|
|
|
case SCTP_SOCKOPT_BINDX_REM:
|
|
/* 'optlen' is the size of the addresses buffer. */
|
|
retval = sctp_setsockopt_bindx(sk, kopt, optlen,
|
|
SCTP_BINDX_REM_ADDR);
|
|
break;
|
|
|
|
case SCTP_SOCKOPT_CONNECTX_OLD:
|
|
/* 'optlen' is the size of the addresses buffer. */
|
|
retval = sctp_setsockopt_connectx_old(sk, kopt, optlen);
|
|
break;
|
|
|
|
case SCTP_SOCKOPT_CONNECTX:
|
|
/* 'optlen' is the size of the addresses buffer. */
|
|
retval = sctp_setsockopt_connectx(sk, kopt, optlen);
|
|
break;
|
|
|
|
case SCTP_DISABLE_FRAGMENTS:
|
|
retval = sctp_setsockopt_disable_fragments(sk, kopt, optlen);
|
|
break;
|
|
|
|
case SCTP_EVENTS:
|
|
retval = sctp_setsockopt_events(sk, kopt, optlen);
|
|
break;
|
|
|
|
case SCTP_AUTOCLOSE:
|
|
retval = sctp_setsockopt_autoclose(sk, kopt, optlen);
|
|
break;
|
|
|
|
case SCTP_PEER_ADDR_PARAMS:
|
|
retval = sctp_setsockopt_peer_addr_params(sk, kopt, optlen);
|
|
break;
|
|
|
|
case SCTP_DELAYED_SACK:
|
|
retval = sctp_setsockopt_delayed_ack(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_PARTIAL_DELIVERY_POINT:
|
|
retval = sctp_setsockopt_partial_delivery_point(sk, kopt, optlen);
|
|
break;
|
|
|
|
case SCTP_INITMSG:
|
|
retval = sctp_setsockopt_initmsg(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_DEFAULT_SEND_PARAM:
|
|
retval = sctp_setsockopt_default_send_param(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_DEFAULT_SNDINFO:
|
|
retval = sctp_setsockopt_default_sndinfo(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_PRIMARY_ADDR:
|
|
retval = sctp_setsockopt_primary_addr(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_SET_PEER_PRIMARY_ADDR:
|
|
retval = sctp_setsockopt_peer_primary_addr(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_NODELAY:
|
|
retval = sctp_setsockopt_nodelay(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_RTOINFO:
|
|
retval = sctp_setsockopt_rtoinfo(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_ASSOCINFO:
|
|
retval = sctp_setsockopt_associnfo(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_I_WANT_MAPPED_V4_ADDR:
|
|
retval = sctp_setsockopt_mappedv4(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_MAXSEG:
|
|
retval = sctp_setsockopt_maxseg(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_ADAPTATION_LAYER:
|
|
retval = sctp_setsockopt_adaptation_layer(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_CONTEXT:
|
|
retval = sctp_setsockopt_context(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_FRAGMENT_INTERLEAVE:
|
|
retval = sctp_setsockopt_fragment_interleave(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_MAX_BURST:
|
|
retval = sctp_setsockopt_maxburst(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_AUTH_CHUNK:
|
|
retval = sctp_setsockopt_auth_chunk(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_HMAC_IDENT:
|
|
retval = sctp_setsockopt_hmac_ident(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_AUTH_KEY:
|
|
retval = sctp_setsockopt_auth_key(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_AUTH_ACTIVE_KEY:
|
|
retval = sctp_setsockopt_active_key(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_AUTH_DELETE_KEY:
|
|
retval = sctp_setsockopt_del_key(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_AUTH_DEACTIVATE_KEY:
|
|
retval = sctp_setsockopt_deactivate_key(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_AUTO_ASCONF:
|
|
retval = sctp_setsockopt_auto_asconf(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_PEER_ADDR_THLDS:
|
|
retval = sctp_setsockopt_paddr_thresholds(sk, kopt, optlen,
|
|
false);
|
|
break;
|
|
case SCTP_PEER_ADDR_THLDS_V2:
|
|
retval = sctp_setsockopt_paddr_thresholds(sk, kopt, optlen,
|
|
true);
|
|
break;
|
|
case SCTP_RECVRCVINFO:
|
|
retval = sctp_setsockopt_recvrcvinfo(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_RECVNXTINFO:
|
|
retval = sctp_setsockopt_recvnxtinfo(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_PR_SUPPORTED:
|
|
retval = sctp_setsockopt_pr_supported(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_DEFAULT_PRINFO:
|
|
retval = sctp_setsockopt_default_prinfo(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_RECONFIG_SUPPORTED:
|
|
retval = sctp_setsockopt_reconfig_supported(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_ENABLE_STREAM_RESET:
|
|
retval = sctp_setsockopt_enable_strreset(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_RESET_STREAMS:
|
|
retval = sctp_setsockopt_reset_streams(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_RESET_ASSOC:
|
|
retval = sctp_setsockopt_reset_assoc(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_ADD_STREAMS:
|
|
retval = sctp_setsockopt_add_streams(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_STREAM_SCHEDULER:
|
|
retval = sctp_setsockopt_scheduler(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_STREAM_SCHEDULER_VALUE:
|
|
retval = sctp_setsockopt_scheduler_value(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_INTERLEAVING_SUPPORTED:
|
|
retval = sctp_setsockopt_interleaving_supported(sk, kopt,
|
|
optlen);
|
|
break;
|
|
case SCTP_REUSE_PORT:
|
|
retval = sctp_setsockopt_reuse_port(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_EVENT:
|
|
retval = sctp_setsockopt_event(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_ASCONF_SUPPORTED:
|
|
retval = sctp_setsockopt_asconf_supported(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_AUTH_SUPPORTED:
|
|
retval = sctp_setsockopt_auth_supported(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_ECN_SUPPORTED:
|
|
retval = sctp_setsockopt_ecn_supported(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_EXPOSE_POTENTIALLY_FAILED_STATE:
|
|
retval = sctp_setsockopt_pf_expose(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_REMOTE_UDP_ENCAPS_PORT:
|
|
retval = sctp_setsockopt_encap_port(sk, kopt, optlen);
|
|
break;
|
|
case SCTP_PLPMTUD_PROBE_INTERVAL:
|
|
retval = sctp_setsockopt_probe_interval(sk, kopt, optlen);
|
|
break;
|
|
default:
|
|
retval = -ENOPROTOOPT;
|
|
break;
|
|
}
|
|
|
|
release_sock(sk);
|
|
kfree(kopt);
|
|
return retval;
|
|
}
|
|
|
|
/* API 3.1.6 connect() - UDP Style Syntax
|
|
*
|
|
* An application may use the connect() call in the UDP model to initiate an
|
|
* association without sending data.
|
|
*
|
|
* The syntax is:
|
|
*
|
|
* ret = connect(int sd, const struct sockaddr *nam, socklen_t len);
|
|
*
|
|
* sd: the socket descriptor to have a new association added to.
|
|
*
|
|
* nam: the address structure (either struct sockaddr_in or struct
|
|
* sockaddr_in6 defined in RFC2553 [7]).
|
|
*
|
|
* len: the size of the address.
|
|
*/
|
|
static int sctp_connect(struct sock *sk, struct sockaddr *addr,
|
|
int addr_len, int flags)
|
|
{
|
|
struct sctp_af *af;
|
|
int err = -EINVAL;
|
|
|
|
lock_sock(sk);
|
|
pr_debug("%s: sk:%p, sockaddr:%p, addr_len:%d\n", __func__, sk,
|
|
addr, addr_len);
|
|
|
|
/* Validate addr_len before calling common connect/connectx routine. */
|
|
af = sctp_get_af_specific(addr->sa_family);
|
|
if (af && addr_len >= af->sockaddr_len)
|
|
err = __sctp_connect(sk, addr, af->sockaddr_len, flags, NULL);
|
|
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
|
|
int sctp_inet_connect(struct socket *sock, struct sockaddr *uaddr,
|
|
int addr_len, int flags)
|
|
{
|
|
if (addr_len < sizeof(uaddr->sa_family))
|
|
return -EINVAL;
|
|
|
|
if (uaddr->sa_family == AF_UNSPEC)
|
|
return -EOPNOTSUPP;
|
|
|
|
return sctp_connect(sock->sk, uaddr, addr_len, flags);
|
|
}
|
|
|
|
/* FIXME: Write comments. */
|
|
static int sctp_disconnect(struct sock *sk, int flags)
|
|
{
|
|
return -EOPNOTSUPP; /* STUB */
|
|
}
|
|
|
|
/* 4.1.4 accept() - TCP Style Syntax
|
|
*
|
|
* Applications use accept() call to remove an established SCTP
|
|
* association from the accept queue of the endpoint. A new socket
|
|
* descriptor will be returned from accept() to represent the newly
|
|
* formed association.
|
|
*/
|
|
static struct sock *sctp_accept(struct sock *sk, int flags, int *err, bool kern)
|
|
{
|
|
struct sctp_sock *sp;
|
|
struct sctp_endpoint *ep;
|
|
struct sock *newsk = NULL;
|
|
struct sctp_association *asoc;
|
|
long timeo;
|
|
int error = 0;
|
|
|
|
lock_sock(sk);
|
|
|
|
sp = sctp_sk(sk);
|
|
ep = sp->ep;
|
|
|
|
if (!sctp_style(sk, TCP)) {
|
|
error = -EOPNOTSUPP;
|
|
goto out;
|
|
}
|
|
|
|
if (!sctp_sstate(sk, LISTENING)) {
|
|
error = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
|
|
|
|
error = sctp_wait_for_accept(sk, timeo);
|
|
if (error)
|
|
goto out;
|
|
|
|
/* We treat the list of associations on the endpoint as the accept
|
|
* queue and pick the first association on the list.
|
|
*/
|
|
asoc = list_entry(ep->asocs.next, struct sctp_association, asocs);
|
|
|
|
newsk = sp->pf->create_accept_sk(sk, asoc, kern);
|
|
if (!newsk) {
|
|
error = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
/* Populate the fields of the newsk from the oldsk and migrate the
|
|
* asoc to the newsk.
|
|
*/
|
|
error = sctp_sock_migrate(sk, newsk, asoc, SCTP_SOCKET_TCP);
|
|
if (error) {
|
|
sk_common_release(newsk);
|
|
newsk = NULL;
|
|
}
|
|
|
|
out:
|
|
release_sock(sk);
|
|
*err = error;
|
|
return newsk;
|
|
}
|
|
|
|
/* The SCTP ioctl handler. */
|
|
static int sctp_ioctl(struct sock *sk, int cmd, unsigned long arg)
|
|
{
|
|
int rc = -ENOTCONN;
|
|
|
|
lock_sock(sk);
|
|
|
|
/*
|
|
* SEQPACKET-style sockets in LISTENING state are valid, for
|
|
* SCTP, so only discard TCP-style sockets in LISTENING state.
|
|
*/
|
|
if (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING))
|
|
goto out;
|
|
|
|
switch (cmd) {
|
|
case SIOCINQ: {
|
|
struct sk_buff *skb;
|
|
unsigned int amount = 0;
|
|
|
|
skb = skb_peek(&sk->sk_receive_queue);
|
|
if (skb != NULL) {
|
|
/*
|
|
* We will only return the amount of this packet since
|
|
* that is all that will be read.
|
|
*/
|
|
amount = skb->len;
|
|
}
|
|
rc = put_user(amount, (int __user *)arg);
|
|
break;
|
|
}
|
|
default:
|
|
rc = -ENOIOCTLCMD;
|
|
break;
|
|
}
|
|
out:
|
|
release_sock(sk);
|
|
return rc;
|
|
}
|
|
|
|
/* This is the function which gets called during socket creation to
|
|
* initialized the SCTP-specific portion of the sock.
|
|
* The sock structure should already be zero-filled memory.
|
|
*/
|
|
static int sctp_init_sock(struct sock *sk)
|
|
{
|
|
struct net *net = sock_net(sk);
|
|
struct sctp_sock *sp;
|
|
|
|
pr_debug("%s: sk:%p\n", __func__, sk);
|
|
|
|
sp = sctp_sk(sk);
|
|
|
|
/* Initialize the SCTP per socket area. */
|
|
switch (sk->sk_type) {
|
|
case SOCK_SEQPACKET:
|
|
sp->type = SCTP_SOCKET_UDP;
|
|
break;
|
|
case SOCK_STREAM:
|
|
sp->type = SCTP_SOCKET_TCP;
|
|
break;
|
|
default:
|
|
return -ESOCKTNOSUPPORT;
|
|
}
|
|
|
|
sk->sk_gso_type = SKB_GSO_SCTP;
|
|
|
|
/* Initialize default send parameters. These parameters can be
|
|
* modified with the SCTP_DEFAULT_SEND_PARAM socket option.
|
|
*/
|
|
sp->default_stream = 0;
|
|
sp->default_ppid = 0;
|
|
sp->default_flags = 0;
|
|
sp->default_context = 0;
|
|
sp->default_timetolive = 0;
|
|
|
|
sp->default_rcv_context = 0;
|
|
sp->max_burst = net->sctp.max_burst;
|
|
|
|
sp->sctp_hmac_alg = net->sctp.sctp_hmac_alg;
|
|
|
|
/* Initialize default setup parameters. These parameters
|
|
* can be modified with the SCTP_INITMSG socket option or
|
|
* overridden by the SCTP_INIT CMSG.
|
|
*/
|
|
sp->initmsg.sinit_num_ostreams = sctp_max_outstreams;
|
|
sp->initmsg.sinit_max_instreams = sctp_max_instreams;
|
|
sp->initmsg.sinit_max_attempts = net->sctp.max_retrans_init;
|
|
sp->initmsg.sinit_max_init_timeo = net->sctp.rto_max;
|
|
|
|
/* Initialize default RTO related parameters. These parameters can
|
|
* be modified for with the SCTP_RTOINFO socket option.
|
|
*/
|
|
sp->rtoinfo.srto_initial = net->sctp.rto_initial;
|
|
sp->rtoinfo.srto_max = net->sctp.rto_max;
|
|
sp->rtoinfo.srto_min = net->sctp.rto_min;
|
|
|
|
/* Initialize default association related parameters. These parameters
|
|
* can be modified with the SCTP_ASSOCINFO socket option.
|
|
*/
|
|
sp->assocparams.sasoc_asocmaxrxt = net->sctp.max_retrans_association;
|
|
sp->assocparams.sasoc_number_peer_destinations = 0;
|
|
sp->assocparams.sasoc_peer_rwnd = 0;
|
|
sp->assocparams.sasoc_local_rwnd = 0;
|
|
sp->assocparams.sasoc_cookie_life = net->sctp.valid_cookie_life;
|
|
|
|
/* Initialize default event subscriptions. By default, all the
|
|
* options are off.
|
|
*/
|
|
sp->subscribe = 0;
|
|
|
|
/* Default Peer Address Parameters. These defaults can
|
|
* be modified via SCTP_PEER_ADDR_PARAMS
|
|
*/
|
|
sp->hbinterval = net->sctp.hb_interval;
|
|
sp->udp_port = htons(net->sctp.udp_port);
|
|
sp->encap_port = htons(net->sctp.encap_port);
|
|
sp->pathmaxrxt = net->sctp.max_retrans_path;
|
|
sp->pf_retrans = net->sctp.pf_retrans;
|
|
sp->ps_retrans = net->sctp.ps_retrans;
|
|
sp->pf_expose = net->sctp.pf_expose;
|
|
sp->pathmtu = 0; /* allow default discovery */
|
|
sp->sackdelay = net->sctp.sack_timeout;
|
|
sp->sackfreq = 2;
|
|
sp->param_flags = SPP_HB_ENABLE |
|
|
SPP_PMTUD_ENABLE |
|
|
SPP_SACKDELAY_ENABLE;
|
|
sp->default_ss = SCTP_SS_DEFAULT;
|
|
|
|
/* If enabled no SCTP message fragmentation will be performed.
|
|
* Configure through SCTP_DISABLE_FRAGMENTS socket option.
|
|
*/
|
|
sp->disable_fragments = 0;
|
|
|
|
/* Enable Nagle algorithm by default. */
|
|
sp->nodelay = 0;
|
|
|
|
sp->recvrcvinfo = 0;
|
|
sp->recvnxtinfo = 0;
|
|
|
|
/* Enable by default. */
|
|
sp->v4mapped = 1;
|
|
|
|
/* Auto-close idle associations after the configured
|
|
* number of seconds. A value of 0 disables this
|
|
* feature. Configure through the SCTP_AUTOCLOSE socket option,
|
|
* for UDP-style sockets only.
|
|
*/
|
|
sp->autoclose = 0;
|
|
|
|
/* User specified fragmentation limit. */
|
|
sp->user_frag = 0;
|
|
|
|
sp->adaptation_ind = 0;
|
|
|
|
sp->pf = sctp_get_pf_specific(sk->sk_family);
|
|
|
|
/* Control variables for partial data delivery. */
|
|
atomic_set(&sp->pd_mode, 0);
|
|
skb_queue_head_init(&sp->pd_lobby);
|
|
sp->frag_interleave = 0;
|
|
sp->probe_interval = net->sctp.probe_interval;
|
|
|
|
/* Create a per socket endpoint structure. Even if we
|
|
* change the data structure relationships, this may still
|
|
* be useful for storing pre-connect address information.
|
|
*/
|
|
sp->ep = sctp_endpoint_new(sk, GFP_KERNEL);
|
|
if (!sp->ep)
|
|
return -ENOMEM;
|
|
|
|
sp->hmac = NULL;
|
|
|
|
sk->sk_destruct = sctp_destruct_sock;
|
|
|
|
SCTP_DBG_OBJCNT_INC(sock);
|
|
|
|
local_bh_disable();
|
|
sk_sockets_allocated_inc(sk);
|
|
sock_prot_inuse_add(net, sk->sk_prot, 1);
|
|
|
|
local_bh_enable();
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Cleanup any SCTP per socket resources. Must be called with
|
|
* sock_net(sk)->sctp.addr_wq_lock held if sp->do_auto_asconf is true
|
|
*/
|
|
static void sctp_destroy_sock(struct sock *sk)
|
|
{
|
|
struct sctp_sock *sp;
|
|
|
|
pr_debug("%s: sk:%p\n", __func__, sk);
|
|
|
|
/* Release our hold on the endpoint. */
|
|
sp = sctp_sk(sk);
|
|
/* This could happen during socket init, thus we bail out
|
|
* early, since the rest of the below is not setup either.
|
|
*/
|
|
if (sp->ep == NULL)
|
|
return;
|
|
|
|
if (sp->do_auto_asconf) {
|
|
sp->do_auto_asconf = 0;
|
|
list_del(&sp->auto_asconf_list);
|
|
}
|
|
sctp_endpoint_free(sp->ep);
|
|
local_bh_disable();
|
|
sk_sockets_allocated_dec(sk);
|
|
sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
|
|
local_bh_enable();
|
|
}
|
|
|
|
/* Triggered when there are no references on the socket anymore */
|
|
static void sctp_destruct_sock(struct sock *sk)
|
|
{
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
|
|
/* Free up the HMAC transform. */
|
|
crypto_free_shash(sp->hmac);
|
|
|
|
inet_sock_destruct(sk);
|
|
}
|
|
|
|
/* API 4.1.7 shutdown() - TCP Style Syntax
|
|
* int shutdown(int socket, int how);
|
|
*
|
|
* sd - the socket descriptor of the association to be closed.
|
|
* how - Specifies the type of shutdown. The values are
|
|
* as follows:
|
|
* SHUT_RD
|
|
* Disables further receive operations. No SCTP
|
|
* protocol action is taken.
|
|
* SHUT_WR
|
|
* Disables further send operations, and initiates
|
|
* the SCTP shutdown sequence.
|
|
* SHUT_RDWR
|
|
* Disables further send and receive operations
|
|
* and initiates the SCTP shutdown sequence.
|
|
*/
|
|
static void sctp_shutdown(struct sock *sk, int how)
|
|
{
|
|
struct net *net = sock_net(sk);
|
|
struct sctp_endpoint *ep;
|
|
|
|
if (!sctp_style(sk, TCP))
|
|
return;
|
|
|
|
ep = sctp_sk(sk)->ep;
|
|
if (how & SEND_SHUTDOWN && !list_empty(&ep->asocs)) {
|
|
struct sctp_association *asoc;
|
|
|
|
inet_sk_set_state(sk, SCTP_SS_CLOSING);
|
|
asoc = list_entry(ep->asocs.next,
|
|
struct sctp_association, asocs);
|
|
sctp_primitive_SHUTDOWN(net, asoc, NULL);
|
|
}
|
|
}
|
|
|
|
int sctp_get_sctp_info(struct sock *sk, struct sctp_association *asoc,
|
|
struct sctp_info *info)
|
|
{
|
|
struct sctp_transport *prim;
|
|
struct list_head *pos;
|
|
int mask;
|
|
|
|
memset(info, 0, sizeof(*info));
|
|
if (!asoc) {
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
|
|
info->sctpi_s_autoclose = sp->autoclose;
|
|
info->sctpi_s_adaptation_ind = sp->adaptation_ind;
|
|
info->sctpi_s_pd_point = sp->pd_point;
|
|
info->sctpi_s_nodelay = sp->nodelay;
|
|
info->sctpi_s_disable_fragments = sp->disable_fragments;
|
|
info->sctpi_s_v4mapped = sp->v4mapped;
|
|
info->sctpi_s_frag_interleave = sp->frag_interleave;
|
|
info->sctpi_s_type = sp->type;
|
|
|
|
return 0;
|
|
}
|
|
|
|
info->sctpi_tag = asoc->c.my_vtag;
|
|
info->sctpi_state = asoc->state;
|
|
info->sctpi_rwnd = asoc->a_rwnd;
|
|
info->sctpi_unackdata = asoc->unack_data;
|
|
info->sctpi_penddata = sctp_tsnmap_pending(&asoc->peer.tsn_map);
|
|
info->sctpi_instrms = asoc->stream.incnt;
|
|
info->sctpi_outstrms = asoc->stream.outcnt;
|
|
list_for_each(pos, &asoc->base.inqueue.in_chunk_list)
|
|
info->sctpi_inqueue++;
|
|
list_for_each(pos, &asoc->outqueue.out_chunk_list)
|
|
info->sctpi_outqueue++;
|
|
info->sctpi_overall_error = asoc->overall_error_count;
|
|
info->sctpi_max_burst = asoc->max_burst;
|
|
info->sctpi_maxseg = asoc->frag_point;
|
|
info->sctpi_peer_rwnd = asoc->peer.rwnd;
|
|
info->sctpi_peer_tag = asoc->c.peer_vtag;
|
|
|
|
mask = asoc->peer.ecn_capable << 1;
|
|
mask = (mask | asoc->peer.ipv4_address) << 1;
|
|
mask = (mask | asoc->peer.ipv6_address) << 1;
|
|
mask = (mask | asoc->peer.hostname_address) << 1;
|
|
mask = (mask | asoc->peer.asconf_capable) << 1;
|
|
mask = (mask | asoc->peer.prsctp_capable) << 1;
|
|
mask = (mask | asoc->peer.auth_capable);
|
|
info->sctpi_peer_capable = mask;
|
|
mask = asoc->peer.sack_needed << 1;
|
|
mask = (mask | asoc->peer.sack_generation) << 1;
|
|
mask = (mask | asoc->peer.zero_window_announced);
|
|
info->sctpi_peer_sack = mask;
|
|
|
|
info->sctpi_isacks = asoc->stats.isacks;
|
|
info->sctpi_osacks = asoc->stats.osacks;
|
|
info->sctpi_opackets = asoc->stats.opackets;
|
|
info->sctpi_ipackets = asoc->stats.ipackets;
|
|
info->sctpi_rtxchunks = asoc->stats.rtxchunks;
|
|
info->sctpi_outofseqtsns = asoc->stats.outofseqtsns;
|
|
info->sctpi_idupchunks = asoc->stats.idupchunks;
|
|
info->sctpi_gapcnt = asoc->stats.gapcnt;
|
|
info->sctpi_ouodchunks = asoc->stats.ouodchunks;
|
|
info->sctpi_iuodchunks = asoc->stats.iuodchunks;
|
|
info->sctpi_oodchunks = asoc->stats.oodchunks;
|
|
info->sctpi_iodchunks = asoc->stats.iodchunks;
|
|
info->sctpi_octrlchunks = asoc->stats.octrlchunks;
|
|
info->sctpi_ictrlchunks = asoc->stats.ictrlchunks;
|
|
|
|
prim = asoc->peer.primary_path;
|
|
memcpy(&info->sctpi_p_address, &prim->ipaddr, sizeof(prim->ipaddr));
|
|
info->sctpi_p_state = prim->state;
|
|
info->sctpi_p_cwnd = prim->cwnd;
|
|
info->sctpi_p_srtt = prim->srtt;
|
|
info->sctpi_p_rto = jiffies_to_msecs(prim->rto);
|
|
info->sctpi_p_hbinterval = prim->hbinterval;
|
|
info->sctpi_p_pathmaxrxt = prim->pathmaxrxt;
|
|
info->sctpi_p_sackdelay = jiffies_to_msecs(prim->sackdelay);
|
|
info->sctpi_p_ssthresh = prim->ssthresh;
|
|
info->sctpi_p_partial_bytes_acked = prim->partial_bytes_acked;
|
|
info->sctpi_p_flight_size = prim->flight_size;
|
|
info->sctpi_p_error = prim->error_count;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(sctp_get_sctp_info);
|
|
|
|
/* use callback to avoid exporting the core structure */
|
|
void sctp_transport_walk_start(struct rhashtable_iter *iter) __acquires(RCU)
|
|
{
|
|
rhltable_walk_enter(&sctp_transport_hashtable, iter);
|
|
|
|
rhashtable_walk_start(iter);
|
|
}
|
|
|
|
void sctp_transport_walk_stop(struct rhashtable_iter *iter) __releases(RCU)
|
|
{
|
|
rhashtable_walk_stop(iter);
|
|
rhashtable_walk_exit(iter);
|
|
}
|
|
|
|
struct sctp_transport *sctp_transport_get_next(struct net *net,
|
|
struct rhashtable_iter *iter)
|
|
{
|
|
struct sctp_transport *t;
|
|
|
|
t = rhashtable_walk_next(iter);
|
|
for (; t; t = rhashtable_walk_next(iter)) {
|
|
if (IS_ERR(t)) {
|
|
if (PTR_ERR(t) == -EAGAIN)
|
|
continue;
|
|
break;
|
|
}
|
|
|
|
if (!sctp_transport_hold(t))
|
|
continue;
|
|
|
|
if (net_eq(t->asoc->base.net, net) &&
|
|
t->asoc->peer.primary_path == t)
|
|
break;
|
|
|
|
sctp_transport_put(t);
|
|
}
|
|
|
|
return t;
|
|
}
|
|
|
|
struct sctp_transport *sctp_transport_get_idx(struct net *net,
|
|
struct rhashtable_iter *iter,
|
|
int pos)
|
|
{
|
|
struct sctp_transport *t;
|
|
|
|
if (!pos)
|
|
return SEQ_START_TOKEN;
|
|
|
|
while ((t = sctp_transport_get_next(net, iter)) && !IS_ERR(t)) {
|
|
if (!--pos)
|
|
break;
|
|
sctp_transport_put(t);
|
|
}
|
|
|
|
return t;
|
|
}
|
|
|
|
int sctp_for_each_endpoint(int (*cb)(struct sctp_endpoint *, void *),
|
|
void *p) {
|
|
int err = 0;
|
|
int hash = 0;
|
|
struct sctp_ep_common *epb;
|
|
struct sctp_hashbucket *head;
|
|
|
|
for (head = sctp_ep_hashtable; hash < sctp_ep_hashsize;
|
|
hash++, head++) {
|
|
read_lock_bh(&head->lock);
|
|
sctp_for_each_hentry(epb, &head->chain) {
|
|
err = cb(sctp_ep(epb), p);
|
|
if (err)
|
|
break;
|
|
}
|
|
read_unlock_bh(&head->lock);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL_GPL(sctp_for_each_endpoint);
|
|
|
|
int sctp_transport_lookup_process(int (*cb)(struct sctp_transport *, void *),
|
|
struct net *net,
|
|
const union sctp_addr *laddr,
|
|
const union sctp_addr *paddr, void *p)
|
|
{
|
|
struct sctp_transport *transport;
|
|
int err;
|
|
|
|
rcu_read_lock();
|
|
transport = sctp_addrs_lookup_transport(net, laddr, paddr);
|
|
rcu_read_unlock();
|
|
if (!transport)
|
|
return -ENOENT;
|
|
|
|
err = cb(transport, p);
|
|
sctp_transport_put(transport);
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL_GPL(sctp_transport_lookup_process);
|
|
|
|
int sctp_for_each_transport(int (*cb)(struct sctp_transport *, void *),
|
|
int (*cb_done)(struct sctp_transport *, void *),
|
|
struct net *net, int *pos, void *p) {
|
|
struct rhashtable_iter hti;
|
|
struct sctp_transport *tsp;
|
|
int ret;
|
|
|
|
again:
|
|
ret = 0;
|
|
sctp_transport_walk_start(&hti);
|
|
|
|
tsp = sctp_transport_get_idx(net, &hti, *pos + 1);
|
|
for (; !IS_ERR_OR_NULL(tsp); tsp = sctp_transport_get_next(net, &hti)) {
|
|
ret = cb(tsp, p);
|
|
if (ret)
|
|
break;
|
|
(*pos)++;
|
|
sctp_transport_put(tsp);
|
|
}
|
|
sctp_transport_walk_stop(&hti);
|
|
|
|
if (ret) {
|
|
if (cb_done && !cb_done(tsp, p)) {
|
|
(*pos)++;
|
|
sctp_transport_put(tsp);
|
|
goto again;
|
|
}
|
|
sctp_transport_put(tsp);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(sctp_for_each_transport);
|
|
|
|
/* 7.2.1 Association Status (SCTP_STATUS)
|
|
|
|
* Applications can retrieve current status information about an
|
|
* association, including association state, peer receiver window size,
|
|
* number of unacked data chunks, and number of data chunks pending
|
|
* receipt. This information is read-only.
|
|
*/
|
|
static int sctp_getsockopt_sctp_status(struct sock *sk, int len,
|
|
char __user *optval,
|
|
int __user *optlen)
|
|
{
|
|
struct sctp_status status;
|
|
struct sctp_association *asoc = NULL;
|
|
struct sctp_transport *transport;
|
|
sctp_assoc_t associd;
|
|
int retval = 0;
|
|
|
|
if (len < sizeof(status)) {
|
|
retval = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
len = sizeof(status);
|
|
if (copy_from_user(&status, optval, len)) {
|
|
retval = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
associd = status.sstat_assoc_id;
|
|
asoc = sctp_id2assoc(sk, associd);
|
|
if (!asoc) {
|
|
retval = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
transport = asoc->peer.primary_path;
|
|
|
|
status.sstat_assoc_id = sctp_assoc2id(asoc);
|
|
status.sstat_state = sctp_assoc_to_state(asoc);
|
|
status.sstat_rwnd = asoc->peer.rwnd;
|
|
status.sstat_unackdata = asoc->unack_data;
|
|
|
|
status.sstat_penddata = sctp_tsnmap_pending(&asoc->peer.tsn_map);
|
|
status.sstat_instrms = asoc->stream.incnt;
|
|
status.sstat_outstrms = asoc->stream.outcnt;
|
|
status.sstat_fragmentation_point = asoc->frag_point;
|
|
status.sstat_primary.spinfo_assoc_id = sctp_assoc2id(transport->asoc);
|
|
memcpy(&status.sstat_primary.spinfo_address, &transport->ipaddr,
|
|
transport->af_specific->sockaddr_len);
|
|
/* Map ipv4 address into v4-mapped-on-v6 address. */
|
|
sctp_get_pf_specific(sk->sk_family)->addr_to_user(sctp_sk(sk),
|
|
(union sctp_addr *)&status.sstat_primary.spinfo_address);
|
|
status.sstat_primary.spinfo_state = transport->state;
|
|
status.sstat_primary.spinfo_cwnd = transport->cwnd;
|
|
status.sstat_primary.spinfo_srtt = transport->srtt;
|
|
status.sstat_primary.spinfo_rto = jiffies_to_msecs(transport->rto);
|
|
status.sstat_primary.spinfo_mtu = transport->pathmtu;
|
|
|
|
if (status.sstat_primary.spinfo_state == SCTP_UNKNOWN)
|
|
status.sstat_primary.spinfo_state = SCTP_ACTIVE;
|
|
|
|
if (put_user(len, optlen)) {
|
|
retval = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
pr_debug("%s: len:%d, state:%d, rwnd:%d, assoc_id:%d\n",
|
|
__func__, len, status.sstat_state, status.sstat_rwnd,
|
|
status.sstat_assoc_id);
|
|
|
|
if (copy_to_user(optval, &status, len)) {
|
|
retval = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
|
|
/* 7.2.2 Peer Address Information (SCTP_GET_PEER_ADDR_INFO)
|
|
*
|
|
* Applications can retrieve information about a specific peer address
|
|
* of an association, including its reachability state, congestion
|
|
* window, and retransmission timer values. This information is
|
|
* read-only.
|
|
*/
|
|
static int sctp_getsockopt_peer_addr_info(struct sock *sk, int len,
|
|
char __user *optval,
|
|
int __user *optlen)
|
|
{
|
|
struct sctp_paddrinfo pinfo;
|
|
struct sctp_transport *transport;
|
|
int retval = 0;
|
|
|
|
if (len < sizeof(pinfo)) {
|
|
retval = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
len = sizeof(pinfo);
|
|
if (copy_from_user(&pinfo, optval, len)) {
|
|
retval = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
transport = sctp_addr_id2transport(sk, &pinfo.spinfo_address,
|
|
pinfo.spinfo_assoc_id);
|
|
if (!transport) {
|
|
retval = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (transport->state == SCTP_PF &&
|
|
transport->asoc->pf_expose == SCTP_PF_EXPOSE_DISABLE) {
|
|
retval = -EACCES;
|
|
goto out;
|
|
}
|
|
|
|
pinfo.spinfo_assoc_id = sctp_assoc2id(transport->asoc);
|
|
pinfo.spinfo_state = transport->state;
|
|
pinfo.spinfo_cwnd = transport->cwnd;
|
|
pinfo.spinfo_srtt = transport->srtt;
|
|
pinfo.spinfo_rto = jiffies_to_msecs(transport->rto);
|
|
pinfo.spinfo_mtu = transport->pathmtu;
|
|
|
|
if (pinfo.spinfo_state == SCTP_UNKNOWN)
|
|
pinfo.spinfo_state = SCTP_ACTIVE;
|
|
|
|
if (put_user(len, optlen)) {
|
|
retval = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
if (copy_to_user(optval, &pinfo, len)) {
|
|
retval = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
/* 7.1.12 Enable/Disable message fragmentation (SCTP_DISABLE_FRAGMENTS)
|
|
*
|
|
* This option is a on/off flag. If enabled no SCTP message
|
|
* fragmentation will be performed. Instead if a message being sent
|
|
* exceeds the current PMTU size, the message will NOT be sent and
|
|
* instead a error will be indicated to the user.
|
|
*/
|
|
static int sctp_getsockopt_disable_fragments(struct sock *sk, int len,
|
|
char __user *optval, int __user *optlen)
|
|
{
|
|
int val;
|
|
|
|
if (len < sizeof(int))
|
|
return -EINVAL;
|
|
|
|
len = sizeof(int);
|
|
val = (sctp_sk(sk)->disable_fragments == 1);
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
if (copy_to_user(optval, &val, len))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
/* 7.1.15 Set notification and ancillary events (SCTP_EVENTS)
|
|
*
|
|
* This socket option is used to specify various notifications and
|
|
* ancillary data the user wishes to receive.
|
|
*/
|
|
static int sctp_getsockopt_events(struct sock *sk, int len, char __user *optval,
|
|
int __user *optlen)
|
|
{
|
|
struct sctp_event_subscribe subscribe;
|
|
__u8 *sn_type = (__u8 *)&subscribe;
|
|
int i;
|
|
|
|
if (len == 0)
|
|
return -EINVAL;
|
|
if (len > sizeof(struct sctp_event_subscribe))
|
|
len = sizeof(struct sctp_event_subscribe);
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
|
|
for (i = 0; i < len; i++)
|
|
sn_type[i] = sctp_ulpevent_type_enabled(sctp_sk(sk)->subscribe,
|
|
SCTP_SN_TYPE_BASE + i);
|
|
|
|
if (copy_to_user(optval, &subscribe, len))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* 7.1.8 Automatic Close of associations (SCTP_AUTOCLOSE)
|
|
*
|
|
* This socket option is applicable to the UDP-style socket only. When
|
|
* set it will cause associations that are idle for more than the
|
|
* specified number of seconds to automatically close. An association
|
|
* being idle is defined an association that has NOT sent or received
|
|
* user data. The special value of '0' indicates that no automatic
|
|
* close of any associations should be performed. The option expects an
|
|
* integer defining the number of seconds of idle time before an
|
|
* association is closed.
|
|
*/
|
|
static int sctp_getsockopt_autoclose(struct sock *sk, int len, char __user *optval, int __user *optlen)
|
|
{
|
|
/* Applicable to UDP-style socket only */
|
|
if (sctp_style(sk, TCP))
|
|
return -EOPNOTSUPP;
|
|
if (len < sizeof(int))
|
|
return -EINVAL;
|
|
len = sizeof(int);
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
if (put_user(sctp_sk(sk)->autoclose, (int __user *)optval))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
/* Helper routine to branch off an association to a new socket. */
|
|
int sctp_do_peeloff(struct sock *sk, sctp_assoc_t id, struct socket **sockp)
|
|
{
|
|
struct sctp_association *asoc = sctp_id2assoc(sk, id);
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
struct socket *sock;
|
|
int err = 0;
|
|
|
|
/* Do not peel off from one netns to another one. */
|
|
if (!net_eq(current->nsproxy->net_ns, sock_net(sk)))
|
|
return -EINVAL;
|
|
|
|
if (!asoc)
|
|
return -EINVAL;
|
|
|
|
/* An association cannot be branched off from an already peeled-off
|
|
* socket, nor is this supported for tcp style sockets.
|
|
*/
|
|
if (!sctp_style(sk, UDP))
|
|
return -EINVAL;
|
|
|
|
/* Create a new socket. */
|
|
err = sock_create(sk->sk_family, SOCK_SEQPACKET, IPPROTO_SCTP, &sock);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
sctp_copy_sock(sock->sk, sk, asoc);
|
|
|
|
/* Make peeled-off sockets more like 1-1 accepted sockets.
|
|
* Set the daddr and initialize id to something more random and also
|
|
* copy over any ip options.
|
|
*/
|
|
sp->pf->to_sk_daddr(&asoc->peer.primary_addr, sk);
|
|
sp->pf->copy_ip_options(sk, sock->sk);
|
|
|
|
/* Populate the fields of the newsk from the oldsk and migrate the
|
|
* asoc to the newsk.
|
|
*/
|
|
err = sctp_sock_migrate(sk, sock->sk, asoc,
|
|
SCTP_SOCKET_UDP_HIGH_BANDWIDTH);
|
|
if (err) {
|
|
sock_release(sock);
|
|
sock = NULL;
|
|
}
|
|
|
|
*sockp = sock;
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL(sctp_do_peeloff);
|
|
|
|
static int sctp_getsockopt_peeloff_common(struct sock *sk, sctp_peeloff_arg_t *peeloff,
|
|
struct file **newfile, unsigned flags)
|
|
{
|
|
struct socket *newsock;
|
|
int retval;
|
|
|
|
retval = sctp_do_peeloff(sk, peeloff->associd, &newsock);
|
|
if (retval < 0)
|
|
goto out;
|
|
|
|
/* Map the socket to an unused fd that can be returned to the user. */
|
|
retval = get_unused_fd_flags(flags & SOCK_CLOEXEC);
|
|
if (retval < 0) {
|
|
sock_release(newsock);
|
|
goto out;
|
|
}
|
|
|
|
*newfile = sock_alloc_file(newsock, 0, NULL);
|
|
if (IS_ERR(*newfile)) {
|
|
put_unused_fd(retval);
|
|
retval = PTR_ERR(*newfile);
|
|
*newfile = NULL;
|
|
return retval;
|
|
}
|
|
|
|
pr_debug("%s: sk:%p, newsk:%p, sd:%d\n", __func__, sk, newsock->sk,
|
|
retval);
|
|
|
|
peeloff->sd = retval;
|
|
|
|
if (flags & SOCK_NONBLOCK)
|
|
(*newfile)->f_flags |= O_NONBLOCK;
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
static int sctp_getsockopt_peeloff(struct sock *sk, int len, char __user *optval, int __user *optlen)
|
|
{
|
|
sctp_peeloff_arg_t peeloff;
|
|
struct file *newfile = NULL;
|
|
int retval = 0;
|
|
|
|
if (len < sizeof(sctp_peeloff_arg_t))
|
|
return -EINVAL;
|
|
len = sizeof(sctp_peeloff_arg_t);
|
|
if (copy_from_user(&peeloff, optval, len))
|
|
return -EFAULT;
|
|
|
|
retval = sctp_getsockopt_peeloff_common(sk, &peeloff, &newfile, 0);
|
|
if (retval < 0)
|
|
goto out;
|
|
|
|
/* Return the fd mapped to the new socket. */
|
|
if (put_user(len, optlen)) {
|
|
fput(newfile);
|
|
put_unused_fd(retval);
|
|
return -EFAULT;
|
|
}
|
|
|
|
if (copy_to_user(optval, &peeloff, len)) {
|
|
fput(newfile);
|
|
put_unused_fd(retval);
|
|
return -EFAULT;
|
|
}
|
|
fd_install(retval, newfile);
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
static int sctp_getsockopt_peeloff_flags(struct sock *sk, int len,
|
|
char __user *optval, int __user *optlen)
|
|
{
|
|
sctp_peeloff_flags_arg_t peeloff;
|
|
struct file *newfile = NULL;
|
|
int retval = 0;
|
|
|
|
if (len < sizeof(sctp_peeloff_flags_arg_t))
|
|
return -EINVAL;
|
|
len = sizeof(sctp_peeloff_flags_arg_t);
|
|
if (copy_from_user(&peeloff, optval, len))
|
|
return -EFAULT;
|
|
|
|
retval = sctp_getsockopt_peeloff_common(sk, &peeloff.p_arg,
|
|
&newfile, peeloff.flags);
|
|
if (retval < 0)
|
|
goto out;
|
|
|
|
/* Return the fd mapped to the new socket. */
|
|
if (put_user(len, optlen)) {
|
|
fput(newfile);
|
|
put_unused_fd(retval);
|
|
return -EFAULT;
|
|
}
|
|
|
|
if (copy_to_user(optval, &peeloff, len)) {
|
|
fput(newfile);
|
|
put_unused_fd(retval);
|
|
return -EFAULT;
|
|
}
|
|
fd_install(retval, newfile);
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
/* 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS)
|
|
*
|
|
* Applications can enable or disable heartbeats for any peer address of
|
|
* an association, modify an address's heartbeat interval, force a
|
|
* heartbeat to be sent immediately, and adjust the address's maximum
|
|
* number of retransmissions sent before an address is considered
|
|
* unreachable. The following structure is used to access and modify an
|
|
* address's parameters:
|
|
*
|
|
* struct sctp_paddrparams {
|
|
* sctp_assoc_t spp_assoc_id;
|
|
* struct sockaddr_storage spp_address;
|
|
* uint32_t spp_hbinterval;
|
|
* uint16_t spp_pathmaxrxt;
|
|
* uint32_t spp_pathmtu;
|
|
* uint32_t spp_sackdelay;
|
|
* uint32_t spp_flags;
|
|
* };
|
|
*
|
|
* spp_assoc_id - (one-to-many style socket) This is filled in the
|
|
* application, and identifies the association for
|
|
* this query.
|
|
* spp_address - This specifies which address is of interest.
|
|
* spp_hbinterval - This contains the value of the heartbeat interval,
|
|
* in milliseconds. If a value of zero
|
|
* is present in this field then no changes are to
|
|
* be made to this parameter.
|
|
* spp_pathmaxrxt - This contains the maximum number of
|
|
* retransmissions before this address shall be
|
|
* considered unreachable. If a value of zero
|
|
* is present in this field then no changes are to
|
|
* be made to this parameter.
|
|
* spp_pathmtu - When Path MTU discovery is disabled the value
|
|
* specified here will be the "fixed" path mtu.
|
|
* Note that if the spp_address field is empty
|
|
* then all associations on this address will
|
|
* have this fixed path mtu set upon them.
|
|
*
|
|
* spp_sackdelay - When delayed sack is enabled, this value specifies
|
|
* the number of milliseconds that sacks will be delayed
|
|
* for. This value will apply to all addresses of an
|
|
* association if the spp_address field is empty. Note
|
|
* also, that if delayed sack is enabled and this
|
|
* value is set to 0, no change is made to the last
|
|
* recorded delayed sack timer value.
|
|
*
|
|
* spp_flags - These flags are used to control various features
|
|
* on an association. The flag field may contain
|
|
* zero or more of the following options.
|
|
*
|
|
* SPP_HB_ENABLE - Enable heartbeats on the
|
|
* specified address. Note that if the address
|
|
* field is empty all addresses for the association
|
|
* have heartbeats enabled upon them.
|
|
*
|
|
* SPP_HB_DISABLE - Disable heartbeats on the
|
|
* speicifed address. Note that if the address
|
|
* field is empty all addresses for the association
|
|
* will have their heartbeats disabled. Note also
|
|
* that SPP_HB_ENABLE and SPP_HB_DISABLE are
|
|
* mutually exclusive, only one of these two should
|
|
* be specified. Enabling both fields will have
|
|
* undetermined results.
|
|
*
|
|
* SPP_HB_DEMAND - Request a user initiated heartbeat
|
|
* to be made immediately.
|
|
*
|
|
* SPP_PMTUD_ENABLE - This field will enable PMTU
|
|
* discovery upon the specified address. Note that
|
|
* if the address feild is empty then all addresses
|
|
* on the association are effected.
|
|
*
|
|
* SPP_PMTUD_DISABLE - This field will disable PMTU
|
|
* discovery upon the specified address. Note that
|
|
* if the address feild is empty then all addresses
|
|
* on the association are effected. Not also that
|
|
* SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually
|
|
* exclusive. Enabling both will have undetermined
|
|
* results.
|
|
*
|
|
* SPP_SACKDELAY_ENABLE - Setting this flag turns
|
|
* on delayed sack. The time specified in spp_sackdelay
|
|
* is used to specify the sack delay for this address. Note
|
|
* that if spp_address is empty then all addresses will
|
|
* enable delayed sack and take on the sack delay
|
|
* value specified in spp_sackdelay.
|
|
* SPP_SACKDELAY_DISABLE - Setting this flag turns
|
|
* off delayed sack. If the spp_address field is blank then
|
|
* delayed sack is disabled for the entire association. Note
|
|
* also that this field is mutually exclusive to
|
|
* SPP_SACKDELAY_ENABLE, setting both will have undefined
|
|
* results.
|
|
*
|
|
* SPP_IPV6_FLOWLABEL: Setting this flag enables the
|
|
* setting of the IPV6 flow label value. The value is
|
|
* contained in the spp_ipv6_flowlabel field.
|
|
* Upon retrieval, this flag will be set to indicate that
|
|
* the spp_ipv6_flowlabel field has a valid value returned.
|
|
* If a specific destination address is set (in the
|
|
* spp_address field), then the value returned is that of
|
|
* the address. If just an association is specified (and
|
|
* no address), then the association's default flow label
|
|
* is returned. If neither an association nor a destination
|
|
* is specified, then the socket's default flow label is
|
|
* returned. For non-IPv6 sockets, this flag will be left
|
|
* cleared.
|
|
*
|
|
* SPP_DSCP: Setting this flag enables the setting of the
|
|
* Differentiated Services Code Point (DSCP) value
|
|
* associated with either the association or a specific
|
|
* address. The value is obtained in the spp_dscp field.
|
|
* Upon retrieval, this flag will be set to indicate that
|
|
* the spp_dscp field has a valid value returned. If a
|
|
* specific destination address is set when called (in the
|
|
* spp_address field), then that specific destination
|
|
* address's DSCP value is returned. If just an association
|
|
* is specified, then the association's default DSCP is
|
|
* returned. If neither an association nor a destination is
|
|
* specified, then the socket's default DSCP is returned.
|
|
*
|
|
* spp_ipv6_flowlabel
|
|
* - This field is used in conjunction with the
|
|
* SPP_IPV6_FLOWLABEL flag and contains the IPv6 flow label.
|
|
* The 20 least significant bits are used for the flow
|
|
* label. This setting has precedence over any IPv6-layer
|
|
* setting.
|
|
*
|
|
* spp_dscp - This field is used in conjunction with the SPP_DSCP flag
|
|
* and contains the DSCP. The 6 most significant bits are
|
|
* used for the DSCP. This setting has precedence over any
|
|
* IPv4- or IPv6- layer setting.
|
|
*/
|
|
static int sctp_getsockopt_peer_addr_params(struct sock *sk, int len,
|
|
char __user *optval, int __user *optlen)
|
|
{
|
|
struct sctp_paddrparams params;
|
|
struct sctp_transport *trans = NULL;
|
|
struct sctp_association *asoc = NULL;
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
|
|
if (len >= sizeof(params))
|
|
len = sizeof(params);
|
|
else if (len >= ALIGN(offsetof(struct sctp_paddrparams,
|
|
spp_ipv6_flowlabel), 4))
|
|
len = ALIGN(offsetof(struct sctp_paddrparams,
|
|
spp_ipv6_flowlabel), 4);
|
|
else
|
|
return -EINVAL;
|
|
|
|
if (copy_from_user(¶ms, optval, len))
|
|
return -EFAULT;
|
|
|
|
/* If an address other than INADDR_ANY is specified, and
|
|
* no transport is found, then the request is invalid.
|
|
*/
|
|
if (!sctp_is_any(sk, (union sctp_addr *)¶ms.spp_address)) {
|
|
trans = sctp_addr_id2transport(sk, ¶ms.spp_address,
|
|
params.spp_assoc_id);
|
|
if (!trans) {
|
|
pr_debug("%s: failed no transport\n", __func__);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
/* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the
|
|
* socket is a one to many style socket, and an association
|
|
* was not found, then the id was invalid.
|
|
*/
|
|
asoc = sctp_id2assoc(sk, params.spp_assoc_id);
|
|
if (!asoc && params.spp_assoc_id != SCTP_FUTURE_ASSOC &&
|
|
sctp_style(sk, UDP)) {
|
|
pr_debug("%s: failed no association\n", __func__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (trans) {
|
|
/* Fetch transport values. */
|
|
params.spp_hbinterval = jiffies_to_msecs(trans->hbinterval);
|
|
params.spp_pathmtu = trans->pathmtu;
|
|
params.spp_pathmaxrxt = trans->pathmaxrxt;
|
|
params.spp_sackdelay = jiffies_to_msecs(trans->sackdelay);
|
|
|
|
/*draft-11 doesn't say what to return in spp_flags*/
|
|
params.spp_flags = trans->param_flags;
|
|
if (trans->flowlabel & SCTP_FLOWLABEL_SET_MASK) {
|
|
params.spp_ipv6_flowlabel = trans->flowlabel &
|
|
SCTP_FLOWLABEL_VAL_MASK;
|
|
params.spp_flags |= SPP_IPV6_FLOWLABEL;
|
|
}
|
|
if (trans->dscp & SCTP_DSCP_SET_MASK) {
|
|
params.spp_dscp = trans->dscp & SCTP_DSCP_VAL_MASK;
|
|
params.spp_flags |= SPP_DSCP;
|
|
}
|
|
} else if (asoc) {
|
|
/* Fetch association values. */
|
|
params.spp_hbinterval = jiffies_to_msecs(asoc->hbinterval);
|
|
params.spp_pathmtu = asoc->pathmtu;
|
|
params.spp_pathmaxrxt = asoc->pathmaxrxt;
|
|
params.spp_sackdelay = jiffies_to_msecs(asoc->sackdelay);
|
|
|
|
/*draft-11 doesn't say what to return in spp_flags*/
|
|
params.spp_flags = asoc->param_flags;
|
|
if (asoc->flowlabel & SCTP_FLOWLABEL_SET_MASK) {
|
|
params.spp_ipv6_flowlabel = asoc->flowlabel &
|
|
SCTP_FLOWLABEL_VAL_MASK;
|
|
params.spp_flags |= SPP_IPV6_FLOWLABEL;
|
|
}
|
|
if (asoc->dscp & SCTP_DSCP_SET_MASK) {
|
|
params.spp_dscp = asoc->dscp & SCTP_DSCP_VAL_MASK;
|
|
params.spp_flags |= SPP_DSCP;
|
|
}
|
|
} else {
|
|
/* Fetch socket values. */
|
|
params.spp_hbinterval = sp->hbinterval;
|
|
params.spp_pathmtu = sp->pathmtu;
|
|
params.spp_sackdelay = sp->sackdelay;
|
|
params.spp_pathmaxrxt = sp->pathmaxrxt;
|
|
|
|
/*draft-11 doesn't say what to return in spp_flags*/
|
|
params.spp_flags = sp->param_flags;
|
|
if (sp->flowlabel & SCTP_FLOWLABEL_SET_MASK) {
|
|
params.spp_ipv6_flowlabel = sp->flowlabel &
|
|
SCTP_FLOWLABEL_VAL_MASK;
|
|
params.spp_flags |= SPP_IPV6_FLOWLABEL;
|
|
}
|
|
if (sp->dscp & SCTP_DSCP_SET_MASK) {
|
|
params.spp_dscp = sp->dscp & SCTP_DSCP_VAL_MASK;
|
|
params.spp_flags |= SPP_DSCP;
|
|
}
|
|
}
|
|
|
|
if (copy_to_user(optval, ¶ms, len))
|
|
return -EFAULT;
|
|
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 7.1.23. Get or set delayed ack timer (SCTP_DELAYED_SACK)
|
|
*
|
|
* This option will effect the way delayed acks are performed. This
|
|
* option allows you to get or set the delayed ack time, in
|
|
* milliseconds. It also allows changing the delayed ack frequency.
|
|
* Changing the frequency to 1 disables the delayed sack algorithm. If
|
|
* the assoc_id is 0, then this sets or gets the endpoints default
|
|
* values. If the assoc_id field is non-zero, then the set or get
|
|
* effects the specified association for the one to many model (the
|
|
* assoc_id field is ignored by the one to one model). Note that if
|
|
* sack_delay or sack_freq are 0 when setting this option, then the
|
|
* current values will remain unchanged.
|
|
*
|
|
* struct sctp_sack_info {
|
|
* sctp_assoc_t sack_assoc_id;
|
|
* uint32_t sack_delay;
|
|
* uint32_t sack_freq;
|
|
* };
|
|
*
|
|
* sack_assoc_id - This parameter, indicates which association the user
|
|
* is performing an action upon. Note that if this field's value is
|
|
* zero then the endpoints default value is changed (effecting future
|
|
* associations only).
|
|
*
|
|
* sack_delay - This parameter contains the number of milliseconds that
|
|
* the user is requesting the delayed ACK timer be set to. Note that
|
|
* this value is defined in the standard to be between 200 and 500
|
|
* milliseconds.
|
|
*
|
|
* sack_freq - This parameter contains the number of packets that must
|
|
* be received before a sack is sent without waiting for the delay
|
|
* timer to expire. The default value for this is 2, setting this
|
|
* value to 1 will disable the delayed sack algorithm.
|
|
*/
|
|
static int sctp_getsockopt_delayed_ack(struct sock *sk, int len,
|
|
char __user *optval,
|
|
int __user *optlen)
|
|
{
|
|
struct sctp_sack_info params;
|
|
struct sctp_association *asoc = NULL;
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
|
|
if (len >= sizeof(struct sctp_sack_info)) {
|
|
len = sizeof(struct sctp_sack_info);
|
|
|
|
if (copy_from_user(¶ms, optval, len))
|
|
return -EFAULT;
|
|
} else if (len == sizeof(struct sctp_assoc_value)) {
|
|
pr_warn_ratelimited(DEPRECATED
|
|
"%s (pid %d) "
|
|
"Use of struct sctp_assoc_value in delayed_ack socket option.\n"
|
|
"Use struct sctp_sack_info instead\n",
|
|
current->comm, task_pid_nr(current));
|
|
if (copy_from_user(¶ms, optval, len))
|
|
return -EFAULT;
|
|
} else
|
|
return -EINVAL;
|
|
|
|
/* Get association, if sack_assoc_id != SCTP_FUTURE_ASSOC and the
|
|
* socket is a one to many style socket, and an association
|
|
* was not found, then the id was invalid.
|
|
*/
|
|
asoc = sctp_id2assoc(sk, params.sack_assoc_id);
|
|
if (!asoc && params.sack_assoc_id != SCTP_FUTURE_ASSOC &&
|
|
sctp_style(sk, UDP))
|
|
return -EINVAL;
|
|
|
|
if (asoc) {
|
|
/* Fetch association values. */
|
|
if (asoc->param_flags & SPP_SACKDELAY_ENABLE) {
|
|
params.sack_delay = jiffies_to_msecs(asoc->sackdelay);
|
|
params.sack_freq = asoc->sackfreq;
|
|
|
|
} else {
|
|
params.sack_delay = 0;
|
|
params.sack_freq = 1;
|
|
}
|
|
} else {
|
|
/* Fetch socket values. */
|
|
if (sp->param_flags & SPP_SACKDELAY_ENABLE) {
|
|
params.sack_delay = sp->sackdelay;
|
|
params.sack_freq = sp->sackfreq;
|
|
} else {
|
|
params.sack_delay = 0;
|
|
params.sack_freq = 1;
|
|
}
|
|
}
|
|
|
|
if (copy_to_user(optval, ¶ms, len))
|
|
return -EFAULT;
|
|
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* 7.1.3 Initialization Parameters (SCTP_INITMSG)
|
|
*
|
|
* Applications can specify protocol parameters for the default association
|
|
* initialization. The option name argument to setsockopt() and getsockopt()
|
|
* is SCTP_INITMSG.
|
|
*
|
|
* Setting initialization parameters is effective only on an unconnected
|
|
* socket (for UDP-style sockets only future associations are effected
|
|
* by the change). With TCP-style sockets, this option is inherited by
|
|
* sockets derived from a listener socket.
|
|
*/
|
|
static int sctp_getsockopt_initmsg(struct sock *sk, int len, char __user *optval, int __user *optlen)
|
|
{
|
|
if (len < sizeof(struct sctp_initmsg))
|
|
return -EINVAL;
|
|
len = sizeof(struct sctp_initmsg);
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
if (copy_to_user(optval, &sctp_sk(sk)->initmsg, len))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int sctp_getsockopt_peer_addrs(struct sock *sk, int len,
|
|
char __user *optval, int __user *optlen)
|
|
{
|
|
struct sctp_association *asoc;
|
|
int cnt = 0;
|
|
struct sctp_getaddrs getaddrs;
|
|
struct sctp_transport *from;
|
|
void __user *to;
|
|
union sctp_addr temp;
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
int addrlen;
|
|
size_t space_left;
|
|
int bytes_copied;
|
|
|
|
if (len < sizeof(struct sctp_getaddrs))
|
|
return -EINVAL;
|
|
|
|
if (copy_from_user(&getaddrs, optval, sizeof(struct sctp_getaddrs)))
|
|
return -EFAULT;
|
|
|
|
/* For UDP-style sockets, id specifies the association to query. */
|
|
asoc = sctp_id2assoc(sk, getaddrs.assoc_id);
|
|
if (!asoc)
|
|
return -EINVAL;
|
|
|
|
to = optval + offsetof(struct sctp_getaddrs, addrs);
|
|
space_left = len - offsetof(struct sctp_getaddrs, addrs);
|
|
|
|
list_for_each_entry(from, &asoc->peer.transport_addr_list,
|
|
transports) {
|
|
memcpy(&temp, &from->ipaddr, sizeof(temp));
|
|
addrlen = sctp_get_pf_specific(sk->sk_family)
|
|
->addr_to_user(sp, &temp);
|
|
if (space_left < addrlen)
|
|
return -ENOMEM;
|
|
if (copy_to_user(to, &temp, addrlen))
|
|
return -EFAULT;
|
|
to += addrlen;
|
|
cnt++;
|
|
space_left -= addrlen;
|
|
}
|
|
|
|
if (put_user(cnt, &((struct sctp_getaddrs __user *)optval)->addr_num))
|
|
return -EFAULT;
|
|
bytes_copied = ((char __user *)to) - optval;
|
|
if (put_user(bytes_copied, optlen))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sctp_copy_laddrs(struct sock *sk, __u16 port, void *to,
|
|
size_t space_left, int *bytes_copied)
|
|
{
|
|
struct sctp_sockaddr_entry *addr;
|
|
union sctp_addr temp;
|
|
int cnt = 0;
|
|
int addrlen;
|
|
struct net *net = sock_net(sk);
|
|
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(addr, &net->sctp.local_addr_list, list) {
|
|
if (!addr->valid)
|
|
continue;
|
|
|
|
if ((PF_INET == sk->sk_family) &&
|
|
(AF_INET6 == addr->a.sa.sa_family))
|
|
continue;
|
|
if ((PF_INET6 == sk->sk_family) &&
|
|
inet_v6_ipv6only(sk) &&
|
|
(AF_INET == addr->a.sa.sa_family))
|
|
continue;
|
|
memcpy(&temp, &addr->a, sizeof(temp));
|
|
if (!temp.v4.sin_port)
|
|
temp.v4.sin_port = htons(port);
|
|
|
|
addrlen = sctp_get_pf_specific(sk->sk_family)
|
|
->addr_to_user(sctp_sk(sk), &temp);
|
|
|
|
if (space_left < addrlen) {
|
|
cnt = -ENOMEM;
|
|
break;
|
|
}
|
|
memcpy(to, &temp, addrlen);
|
|
|
|
to += addrlen;
|
|
cnt++;
|
|
space_left -= addrlen;
|
|
*bytes_copied += addrlen;
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
return cnt;
|
|
}
|
|
|
|
|
|
static int sctp_getsockopt_local_addrs(struct sock *sk, int len,
|
|
char __user *optval, int __user *optlen)
|
|
{
|
|
struct sctp_bind_addr *bp;
|
|
struct sctp_association *asoc;
|
|
int cnt = 0;
|
|
struct sctp_getaddrs getaddrs;
|
|
struct sctp_sockaddr_entry *addr;
|
|
void __user *to;
|
|
union sctp_addr temp;
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
int addrlen;
|
|
int err = 0;
|
|
size_t space_left;
|
|
int bytes_copied = 0;
|
|
void *addrs;
|
|
void *buf;
|
|
|
|
if (len < sizeof(struct sctp_getaddrs))
|
|
return -EINVAL;
|
|
|
|
if (copy_from_user(&getaddrs, optval, sizeof(struct sctp_getaddrs)))
|
|
return -EFAULT;
|
|
|
|
/*
|
|
* For UDP-style sockets, id specifies the association to query.
|
|
* If the id field is set to the value '0' then the locally bound
|
|
* addresses are returned without regard to any particular
|
|
* association.
|
|
*/
|
|
if (0 == getaddrs.assoc_id) {
|
|
bp = &sctp_sk(sk)->ep->base.bind_addr;
|
|
} else {
|
|
asoc = sctp_id2assoc(sk, getaddrs.assoc_id);
|
|
if (!asoc)
|
|
return -EINVAL;
|
|
bp = &asoc->base.bind_addr;
|
|
}
|
|
|
|
to = optval + offsetof(struct sctp_getaddrs, addrs);
|
|
space_left = len - offsetof(struct sctp_getaddrs, addrs);
|
|
|
|
addrs = kmalloc(space_left, GFP_USER | __GFP_NOWARN);
|
|
if (!addrs)
|
|
return -ENOMEM;
|
|
|
|
/* If the endpoint is bound to 0.0.0.0 or ::0, get the valid
|
|
* addresses from the global local address list.
|
|
*/
|
|
if (sctp_list_single_entry(&bp->address_list)) {
|
|
addr = list_entry(bp->address_list.next,
|
|
struct sctp_sockaddr_entry, list);
|
|
if (sctp_is_any(sk, &addr->a)) {
|
|
cnt = sctp_copy_laddrs(sk, bp->port, addrs,
|
|
space_left, &bytes_copied);
|
|
if (cnt < 0) {
|
|
err = cnt;
|
|
goto out;
|
|
}
|
|
goto copy_getaddrs;
|
|
}
|
|
}
|
|
|
|
buf = addrs;
|
|
/* Protection on the bound address list is not needed since
|
|
* in the socket option context we hold a socket lock and
|
|
* thus the bound address list can't change.
|
|
*/
|
|
list_for_each_entry(addr, &bp->address_list, list) {
|
|
memcpy(&temp, &addr->a, sizeof(temp));
|
|
addrlen = sctp_get_pf_specific(sk->sk_family)
|
|
->addr_to_user(sp, &temp);
|
|
if (space_left < addrlen) {
|
|
err = -ENOMEM; /*fixme: right error?*/
|
|
goto out;
|
|
}
|
|
memcpy(buf, &temp, addrlen);
|
|
buf += addrlen;
|
|
bytes_copied += addrlen;
|
|
cnt++;
|
|
space_left -= addrlen;
|
|
}
|
|
|
|
copy_getaddrs:
|
|
if (copy_to_user(to, addrs, bytes_copied)) {
|
|
err = -EFAULT;
|
|
goto out;
|
|
}
|
|
if (put_user(cnt, &((struct sctp_getaddrs __user *)optval)->addr_num)) {
|
|
err = -EFAULT;
|
|
goto out;
|
|
}
|
|
/* XXX: We should have accounted for sizeof(struct sctp_getaddrs) too,
|
|
* but we can't change it anymore.
|
|
*/
|
|
if (put_user(bytes_copied, optlen))
|
|
err = -EFAULT;
|
|
out:
|
|
kfree(addrs);
|
|
return err;
|
|
}
|
|
|
|
/* 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR)
|
|
*
|
|
* Requests that the local SCTP stack use the enclosed peer address as
|
|
* the association primary. The enclosed address must be one of the
|
|
* association peer's addresses.
|
|
*/
|
|
static int sctp_getsockopt_primary_addr(struct sock *sk, int len,
|
|
char __user *optval, int __user *optlen)
|
|
{
|
|
struct sctp_prim prim;
|
|
struct sctp_association *asoc;
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
|
|
if (len < sizeof(struct sctp_prim))
|
|
return -EINVAL;
|
|
|
|
len = sizeof(struct sctp_prim);
|
|
|
|
if (copy_from_user(&prim, optval, len))
|
|
return -EFAULT;
|
|
|
|
asoc = sctp_id2assoc(sk, prim.ssp_assoc_id);
|
|
if (!asoc)
|
|
return -EINVAL;
|
|
|
|
if (!asoc->peer.primary_path)
|
|
return -ENOTCONN;
|
|
|
|
memcpy(&prim.ssp_addr, &asoc->peer.primary_path->ipaddr,
|
|
asoc->peer.primary_path->af_specific->sockaddr_len);
|
|
|
|
sctp_get_pf_specific(sk->sk_family)->addr_to_user(sp,
|
|
(union sctp_addr *)&prim.ssp_addr);
|
|
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
if (copy_to_user(optval, &prim, len))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 7.1.11 Set Adaptation Layer Indicator (SCTP_ADAPTATION_LAYER)
|
|
*
|
|
* Requests that the local endpoint set the specified Adaptation Layer
|
|
* Indication parameter for all future INIT and INIT-ACK exchanges.
|
|
*/
|
|
static int sctp_getsockopt_adaptation_layer(struct sock *sk, int len,
|
|
char __user *optval, int __user *optlen)
|
|
{
|
|
struct sctp_setadaptation adaptation;
|
|
|
|
if (len < sizeof(struct sctp_setadaptation))
|
|
return -EINVAL;
|
|
|
|
len = sizeof(struct sctp_setadaptation);
|
|
|
|
adaptation.ssb_adaptation_ind = sctp_sk(sk)->adaptation_ind;
|
|
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
if (copy_to_user(optval, &adaptation, len))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
*
|
|
* 7.1.14 Set default send parameters (SCTP_DEFAULT_SEND_PARAM)
|
|
*
|
|
* Applications that wish to use the sendto() system call may wish to
|
|
* specify a default set of parameters that would normally be supplied
|
|
* through the inclusion of ancillary data. This socket option allows
|
|
* such an application to set the default sctp_sndrcvinfo structure.
|
|
|
|
|
|
* The application that wishes to use this socket option simply passes
|
|
* in to this call the sctp_sndrcvinfo structure defined in Section
|
|
* 5.2.2) The input parameters accepted by this call include
|
|
* sinfo_stream, sinfo_flags, sinfo_ppid, sinfo_context,
|
|
* sinfo_timetolive. The user must provide the sinfo_assoc_id field in
|
|
* to this call if the caller is using the UDP model.
|
|
*
|
|
* For getsockopt, it get the default sctp_sndrcvinfo structure.
|
|
*/
|
|
static int sctp_getsockopt_default_send_param(struct sock *sk,
|
|
int len, char __user *optval,
|
|
int __user *optlen)
|
|
{
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
struct sctp_association *asoc;
|
|
struct sctp_sndrcvinfo info;
|
|
|
|
if (len < sizeof(info))
|
|
return -EINVAL;
|
|
|
|
len = sizeof(info);
|
|
|
|
if (copy_from_user(&info, optval, len))
|
|
return -EFAULT;
|
|
|
|
asoc = sctp_id2assoc(sk, info.sinfo_assoc_id);
|
|
if (!asoc && info.sinfo_assoc_id != SCTP_FUTURE_ASSOC &&
|
|
sctp_style(sk, UDP))
|
|
return -EINVAL;
|
|
|
|
if (asoc) {
|
|
info.sinfo_stream = asoc->default_stream;
|
|
info.sinfo_flags = asoc->default_flags;
|
|
info.sinfo_ppid = asoc->default_ppid;
|
|
info.sinfo_context = asoc->default_context;
|
|
info.sinfo_timetolive = asoc->default_timetolive;
|
|
} else {
|
|
info.sinfo_stream = sp->default_stream;
|
|
info.sinfo_flags = sp->default_flags;
|
|
info.sinfo_ppid = sp->default_ppid;
|
|
info.sinfo_context = sp->default_context;
|
|
info.sinfo_timetolive = sp->default_timetolive;
|
|
}
|
|
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
if (copy_to_user(optval, &info, len))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* RFC6458, Section 8.1.31. Set/get Default Send Parameters
|
|
* (SCTP_DEFAULT_SNDINFO)
|
|
*/
|
|
static int sctp_getsockopt_default_sndinfo(struct sock *sk, int len,
|
|
char __user *optval,
|
|
int __user *optlen)
|
|
{
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
struct sctp_association *asoc;
|
|
struct sctp_sndinfo info;
|
|
|
|
if (len < sizeof(info))
|
|
return -EINVAL;
|
|
|
|
len = sizeof(info);
|
|
|
|
if (copy_from_user(&info, optval, len))
|
|
return -EFAULT;
|
|
|
|
asoc = sctp_id2assoc(sk, info.snd_assoc_id);
|
|
if (!asoc && info.snd_assoc_id != SCTP_FUTURE_ASSOC &&
|
|
sctp_style(sk, UDP))
|
|
return -EINVAL;
|
|
|
|
if (asoc) {
|
|
info.snd_sid = asoc->default_stream;
|
|
info.snd_flags = asoc->default_flags;
|
|
info.snd_ppid = asoc->default_ppid;
|
|
info.snd_context = asoc->default_context;
|
|
} else {
|
|
info.snd_sid = sp->default_stream;
|
|
info.snd_flags = sp->default_flags;
|
|
info.snd_ppid = sp->default_ppid;
|
|
info.snd_context = sp->default_context;
|
|
}
|
|
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
if (copy_to_user(optval, &info, len))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
*
|
|
* 7.1.5 SCTP_NODELAY
|
|
*
|
|
* Turn on/off any Nagle-like algorithm. This means that packets are
|
|
* generally sent as soon as possible and no unnecessary delays are
|
|
* introduced, at the cost of more packets in the network. Expects an
|
|
* integer boolean flag.
|
|
*/
|
|
|
|
static int sctp_getsockopt_nodelay(struct sock *sk, int len,
|
|
char __user *optval, int __user *optlen)
|
|
{
|
|
int val;
|
|
|
|
if (len < sizeof(int))
|
|
return -EINVAL;
|
|
|
|
len = sizeof(int);
|
|
val = (sctp_sk(sk)->nodelay == 1);
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
if (copy_to_user(optval, &val, len))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
*
|
|
* 7.1.1 SCTP_RTOINFO
|
|
*
|
|
* The protocol parameters used to initialize and bound retransmission
|
|
* timeout (RTO) are tunable. sctp_rtoinfo structure is used to access
|
|
* and modify these parameters.
|
|
* All parameters are time values, in milliseconds. A value of 0, when
|
|
* modifying the parameters, indicates that the current value should not
|
|
* be changed.
|
|
*
|
|
*/
|
|
static int sctp_getsockopt_rtoinfo(struct sock *sk, int len,
|
|
char __user *optval,
|
|
int __user *optlen) {
|
|
struct sctp_rtoinfo rtoinfo;
|
|
struct sctp_association *asoc;
|
|
|
|
if (len < sizeof (struct sctp_rtoinfo))
|
|
return -EINVAL;
|
|
|
|
len = sizeof(struct sctp_rtoinfo);
|
|
|
|
if (copy_from_user(&rtoinfo, optval, len))
|
|
return -EFAULT;
|
|
|
|
asoc = sctp_id2assoc(sk, rtoinfo.srto_assoc_id);
|
|
|
|
if (!asoc && rtoinfo.srto_assoc_id != SCTP_FUTURE_ASSOC &&
|
|
sctp_style(sk, UDP))
|
|
return -EINVAL;
|
|
|
|
/* Values corresponding to the specific association. */
|
|
if (asoc) {
|
|
rtoinfo.srto_initial = jiffies_to_msecs(asoc->rto_initial);
|
|
rtoinfo.srto_max = jiffies_to_msecs(asoc->rto_max);
|
|
rtoinfo.srto_min = jiffies_to_msecs(asoc->rto_min);
|
|
} else {
|
|
/* Values corresponding to the endpoint. */
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
|
|
rtoinfo.srto_initial = sp->rtoinfo.srto_initial;
|
|
rtoinfo.srto_max = sp->rtoinfo.srto_max;
|
|
rtoinfo.srto_min = sp->rtoinfo.srto_min;
|
|
}
|
|
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
|
|
if (copy_to_user(optval, &rtoinfo, len))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
*
|
|
* 7.1.2 SCTP_ASSOCINFO
|
|
*
|
|
* This option is used to tune the maximum retransmission attempts
|
|
* of the association.
|
|
* Returns an error if the new association retransmission value is
|
|
* greater than the sum of the retransmission value of the peer.
|
|
* See [SCTP] for more information.
|
|
*
|
|
*/
|
|
static int sctp_getsockopt_associnfo(struct sock *sk, int len,
|
|
char __user *optval,
|
|
int __user *optlen)
|
|
{
|
|
|
|
struct sctp_assocparams assocparams;
|
|
struct sctp_association *asoc;
|
|
struct list_head *pos;
|
|
int cnt = 0;
|
|
|
|
if (len < sizeof (struct sctp_assocparams))
|
|
return -EINVAL;
|
|
|
|
len = sizeof(struct sctp_assocparams);
|
|
|
|
if (copy_from_user(&assocparams, optval, len))
|
|
return -EFAULT;
|
|
|
|
asoc = sctp_id2assoc(sk, assocparams.sasoc_assoc_id);
|
|
|
|
if (!asoc && assocparams.sasoc_assoc_id != SCTP_FUTURE_ASSOC &&
|
|
sctp_style(sk, UDP))
|
|
return -EINVAL;
|
|
|
|
/* Values correspoinding to the specific association */
|
|
if (asoc) {
|
|
assocparams.sasoc_asocmaxrxt = asoc->max_retrans;
|
|
assocparams.sasoc_peer_rwnd = asoc->peer.rwnd;
|
|
assocparams.sasoc_local_rwnd = asoc->a_rwnd;
|
|
assocparams.sasoc_cookie_life = ktime_to_ms(asoc->cookie_life);
|
|
|
|
list_for_each(pos, &asoc->peer.transport_addr_list) {
|
|
cnt++;
|
|
}
|
|
|
|
assocparams.sasoc_number_peer_destinations = cnt;
|
|
} else {
|
|
/* Values corresponding to the endpoint */
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
|
|
assocparams.sasoc_asocmaxrxt = sp->assocparams.sasoc_asocmaxrxt;
|
|
assocparams.sasoc_peer_rwnd = sp->assocparams.sasoc_peer_rwnd;
|
|
assocparams.sasoc_local_rwnd = sp->assocparams.sasoc_local_rwnd;
|
|
assocparams.sasoc_cookie_life =
|
|
sp->assocparams.sasoc_cookie_life;
|
|
assocparams.sasoc_number_peer_destinations =
|
|
sp->assocparams.
|
|
sasoc_number_peer_destinations;
|
|
}
|
|
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
|
|
if (copy_to_user(optval, &assocparams, len))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 7.1.16 Set/clear IPv4 mapped addresses (SCTP_I_WANT_MAPPED_V4_ADDR)
|
|
*
|
|
* This socket option is a boolean flag which turns on or off mapped V4
|
|
* addresses. If this option is turned on and the socket is type
|
|
* PF_INET6, then IPv4 addresses will be mapped to V6 representation.
|
|
* If this option is turned off, then no mapping will be done of V4
|
|
* addresses and a user will receive both PF_INET6 and PF_INET type
|
|
* addresses on the socket.
|
|
*/
|
|
static int sctp_getsockopt_mappedv4(struct sock *sk, int len,
|
|
char __user *optval, int __user *optlen)
|
|
{
|
|
int val;
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
|
|
if (len < sizeof(int))
|
|
return -EINVAL;
|
|
|
|
len = sizeof(int);
|
|
val = sp->v4mapped;
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
if (copy_to_user(optval, &val, len))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 7.1.29. Set or Get the default context (SCTP_CONTEXT)
|
|
* (chapter and verse is quoted at sctp_setsockopt_context())
|
|
*/
|
|
static int sctp_getsockopt_context(struct sock *sk, int len,
|
|
char __user *optval, int __user *optlen)
|
|
{
|
|
struct sctp_assoc_value params;
|
|
struct sctp_association *asoc;
|
|
|
|
if (len < sizeof(struct sctp_assoc_value))
|
|
return -EINVAL;
|
|
|
|
len = sizeof(struct sctp_assoc_value);
|
|
|
|
if (copy_from_user(¶ms, optval, len))
|
|
return -EFAULT;
|
|
|
|
asoc = sctp_id2assoc(sk, params.assoc_id);
|
|
if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
|
|
sctp_style(sk, UDP))
|
|
return -EINVAL;
|
|
|
|
params.assoc_value = asoc ? asoc->default_rcv_context
|
|
: sctp_sk(sk)->default_rcv_context;
|
|
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
if (copy_to_user(optval, ¶ms, len))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 8.1.16. Get or Set the Maximum Fragmentation Size (SCTP_MAXSEG)
|
|
* This option will get or set the maximum size to put in any outgoing
|
|
* SCTP DATA chunk. If a message is larger than this size it will be
|
|
* fragmented by SCTP into the specified size. Note that the underlying
|
|
* SCTP implementation may fragment into smaller sized chunks when the
|
|
* PMTU of the underlying association is smaller than the value set by
|
|
* the user. The default value for this option is '0' which indicates
|
|
* the user is NOT limiting fragmentation and only the PMTU will effect
|
|
* SCTP's choice of DATA chunk size. Note also that values set larger
|
|
* than the maximum size of an IP datagram will effectively let SCTP
|
|
* control fragmentation (i.e. the same as setting this option to 0).
|
|
*
|
|
* The following structure is used to access and modify this parameter:
|
|
*
|
|
* struct sctp_assoc_value {
|
|
* sctp_assoc_t assoc_id;
|
|
* uint32_t assoc_value;
|
|
* };
|
|
*
|
|
* assoc_id: This parameter is ignored for one-to-one style sockets.
|
|
* For one-to-many style sockets this parameter indicates which
|
|
* association the user is performing an action upon. Note that if
|
|
* this field's value is zero then the endpoints default value is
|
|
* changed (effecting future associations only).
|
|
* assoc_value: This parameter specifies the maximum size in bytes.
|
|
*/
|
|
static int sctp_getsockopt_maxseg(struct sock *sk, int len,
|
|
char __user *optval, int __user *optlen)
|
|
{
|
|
struct sctp_assoc_value params;
|
|
struct sctp_association *asoc;
|
|
|
|
if (len == sizeof(int)) {
|
|
pr_warn_ratelimited(DEPRECATED
|
|
"%s (pid %d) "
|
|
"Use of int in maxseg socket option.\n"
|
|
"Use struct sctp_assoc_value instead\n",
|
|
current->comm, task_pid_nr(current));
|
|
params.assoc_id = SCTP_FUTURE_ASSOC;
|
|
} else if (len >= sizeof(struct sctp_assoc_value)) {
|
|
len = sizeof(struct sctp_assoc_value);
|
|
if (copy_from_user(¶ms, optval, len))
|
|
return -EFAULT;
|
|
} else
|
|
return -EINVAL;
|
|
|
|
asoc = sctp_id2assoc(sk, params.assoc_id);
|
|
if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
|
|
sctp_style(sk, UDP))
|
|
return -EINVAL;
|
|
|
|
if (asoc)
|
|
params.assoc_value = asoc->frag_point;
|
|
else
|
|
params.assoc_value = sctp_sk(sk)->user_frag;
|
|
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
if (len == sizeof(int)) {
|
|
if (copy_to_user(optval, ¶ms.assoc_value, len))
|
|
return -EFAULT;
|
|
} else {
|
|
if (copy_to_user(optval, ¶ms, len))
|
|
return -EFAULT;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 7.1.24. Get or set fragmented interleave (SCTP_FRAGMENT_INTERLEAVE)
|
|
* (chapter and verse is quoted at sctp_setsockopt_fragment_interleave())
|
|
*/
|
|
static int sctp_getsockopt_fragment_interleave(struct sock *sk, int len,
|
|
char __user *optval, int __user *optlen)
|
|
{
|
|
int val;
|
|
|
|
if (len < sizeof(int))
|
|
return -EINVAL;
|
|
|
|
len = sizeof(int);
|
|
|
|
val = sctp_sk(sk)->frag_interleave;
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
if (copy_to_user(optval, &val, len))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 7.1.25. Set or Get the sctp partial delivery point
|
|
* (chapter and verse is quoted at sctp_setsockopt_partial_delivery_point())
|
|
*/
|
|
static int sctp_getsockopt_partial_delivery_point(struct sock *sk, int len,
|
|
char __user *optval,
|
|
int __user *optlen)
|
|
{
|
|
u32 val;
|
|
|
|
if (len < sizeof(u32))
|
|
return -EINVAL;
|
|
|
|
len = sizeof(u32);
|
|
|
|
val = sctp_sk(sk)->pd_point;
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
if (copy_to_user(optval, &val, len))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 7.1.28. Set or Get the maximum burst (SCTP_MAX_BURST)
|
|
* (chapter and verse is quoted at sctp_setsockopt_maxburst())
|
|
*/
|
|
static int sctp_getsockopt_maxburst(struct sock *sk, int len,
|
|
char __user *optval,
|
|
int __user *optlen)
|
|
{
|
|
struct sctp_assoc_value params;
|
|
struct sctp_association *asoc;
|
|
|
|
if (len == sizeof(int)) {
|
|
pr_warn_ratelimited(DEPRECATED
|
|
"%s (pid %d) "
|
|
"Use of int in max_burst socket option.\n"
|
|
"Use struct sctp_assoc_value instead\n",
|
|
current->comm, task_pid_nr(current));
|
|
params.assoc_id = SCTP_FUTURE_ASSOC;
|
|
} else if (len >= sizeof(struct sctp_assoc_value)) {
|
|
len = sizeof(struct sctp_assoc_value);
|
|
if (copy_from_user(¶ms, optval, len))
|
|
return -EFAULT;
|
|
} else
|
|
return -EINVAL;
|
|
|
|
asoc = sctp_id2assoc(sk, params.assoc_id);
|
|
if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
|
|
sctp_style(sk, UDP))
|
|
return -EINVAL;
|
|
|
|
params.assoc_value = asoc ? asoc->max_burst : sctp_sk(sk)->max_burst;
|
|
|
|
if (len == sizeof(int)) {
|
|
if (copy_to_user(optval, ¶ms.assoc_value, len))
|
|
return -EFAULT;
|
|
} else {
|
|
if (copy_to_user(optval, ¶ms, len))
|
|
return -EFAULT;
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
static int sctp_getsockopt_hmac_ident(struct sock *sk, int len,
|
|
char __user *optval, int __user *optlen)
|
|
{
|
|
struct sctp_endpoint *ep = sctp_sk(sk)->ep;
|
|
struct sctp_hmacalgo __user *p = (void __user *)optval;
|
|
struct sctp_hmac_algo_param *hmacs;
|
|
__u16 data_len = 0;
|
|
u32 num_idents;
|
|
int i;
|
|
|
|
if (!ep->auth_enable)
|
|
return -EACCES;
|
|
|
|
hmacs = ep->auth_hmacs_list;
|
|
data_len = ntohs(hmacs->param_hdr.length) -
|
|
sizeof(struct sctp_paramhdr);
|
|
|
|
if (len < sizeof(struct sctp_hmacalgo) + data_len)
|
|
return -EINVAL;
|
|
|
|
len = sizeof(struct sctp_hmacalgo) + data_len;
|
|
num_idents = data_len / sizeof(u16);
|
|
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
if (put_user(num_idents, &p->shmac_num_idents))
|
|
return -EFAULT;
|
|
for (i = 0; i < num_idents; i++) {
|
|
__u16 hmacid = ntohs(hmacs->hmac_ids[i]);
|
|
|
|
if (copy_to_user(&p->shmac_idents[i], &hmacid, sizeof(__u16)))
|
|
return -EFAULT;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int sctp_getsockopt_active_key(struct sock *sk, int len,
|
|
char __user *optval, int __user *optlen)
|
|
{
|
|
struct sctp_endpoint *ep = sctp_sk(sk)->ep;
|
|
struct sctp_authkeyid val;
|
|
struct sctp_association *asoc;
|
|
|
|
if (len < sizeof(struct sctp_authkeyid))
|
|
return -EINVAL;
|
|
|
|
len = sizeof(struct sctp_authkeyid);
|
|
if (copy_from_user(&val, optval, len))
|
|
return -EFAULT;
|
|
|
|
asoc = sctp_id2assoc(sk, val.scact_assoc_id);
|
|
if (!asoc && val.scact_assoc_id && sctp_style(sk, UDP))
|
|
return -EINVAL;
|
|
|
|
if (asoc) {
|
|
if (!asoc->peer.auth_capable)
|
|
return -EACCES;
|
|
val.scact_keynumber = asoc->active_key_id;
|
|
} else {
|
|
if (!ep->auth_enable)
|
|
return -EACCES;
|
|
val.scact_keynumber = ep->active_key_id;
|
|
}
|
|
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
if (copy_to_user(optval, &val, len))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sctp_getsockopt_peer_auth_chunks(struct sock *sk, int len,
|
|
char __user *optval, int __user *optlen)
|
|
{
|
|
struct sctp_authchunks __user *p = (void __user *)optval;
|
|
struct sctp_authchunks val;
|
|
struct sctp_association *asoc;
|
|
struct sctp_chunks_param *ch;
|
|
u32 num_chunks = 0;
|
|
char __user *to;
|
|
|
|
if (len < sizeof(struct sctp_authchunks))
|
|
return -EINVAL;
|
|
|
|
if (copy_from_user(&val, optval, sizeof(val)))
|
|
return -EFAULT;
|
|
|
|
to = p->gauth_chunks;
|
|
asoc = sctp_id2assoc(sk, val.gauth_assoc_id);
|
|
if (!asoc)
|
|
return -EINVAL;
|
|
|
|
if (!asoc->peer.auth_capable)
|
|
return -EACCES;
|
|
|
|
ch = asoc->peer.peer_chunks;
|
|
if (!ch)
|
|
goto num;
|
|
|
|
/* See if the user provided enough room for all the data */
|
|
num_chunks = ntohs(ch->param_hdr.length) - sizeof(struct sctp_paramhdr);
|
|
if (len < num_chunks)
|
|
return -EINVAL;
|
|
|
|
if (copy_to_user(to, ch->chunks, num_chunks))
|
|
return -EFAULT;
|
|
num:
|
|
len = sizeof(struct sctp_authchunks) + num_chunks;
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
if (put_user(num_chunks, &p->gauth_number_of_chunks))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
static int sctp_getsockopt_local_auth_chunks(struct sock *sk, int len,
|
|
char __user *optval, int __user *optlen)
|
|
{
|
|
struct sctp_endpoint *ep = sctp_sk(sk)->ep;
|
|
struct sctp_authchunks __user *p = (void __user *)optval;
|
|
struct sctp_authchunks val;
|
|
struct sctp_association *asoc;
|
|
struct sctp_chunks_param *ch;
|
|
u32 num_chunks = 0;
|
|
char __user *to;
|
|
|
|
if (len < sizeof(struct sctp_authchunks))
|
|
return -EINVAL;
|
|
|
|
if (copy_from_user(&val, optval, sizeof(val)))
|
|
return -EFAULT;
|
|
|
|
to = p->gauth_chunks;
|
|
asoc = sctp_id2assoc(sk, val.gauth_assoc_id);
|
|
if (!asoc && val.gauth_assoc_id != SCTP_FUTURE_ASSOC &&
|
|
sctp_style(sk, UDP))
|
|
return -EINVAL;
|
|
|
|
if (asoc) {
|
|
if (!asoc->peer.auth_capable)
|
|
return -EACCES;
|
|
ch = (struct sctp_chunks_param *)asoc->c.auth_chunks;
|
|
} else {
|
|
if (!ep->auth_enable)
|
|
return -EACCES;
|
|
ch = ep->auth_chunk_list;
|
|
}
|
|
if (!ch)
|
|
goto num;
|
|
|
|
num_chunks = ntohs(ch->param_hdr.length) - sizeof(struct sctp_paramhdr);
|
|
if (len < sizeof(struct sctp_authchunks) + num_chunks)
|
|
return -EINVAL;
|
|
|
|
if (copy_to_user(to, ch->chunks, num_chunks))
|
|
return -EFAULT;
|
|
num:
|
|
len = sizeof(struct sctp_authchunks) + num_chunks;
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
if (put_user(num_chunks, &p->gauth_number_of_chunks))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 8.2.5. Get the Current Number of Associations (SCTP_GET_ASSOC_NUMBER)
|
|
* This option gets the current number of associations that are attached
|
|
* to a one-to-many style socket. The option value is an uint32_t.
|
|
*/
|
|
static int sctp_getsockopt_assoc_number(struct sock *sk, int len,
|
|
char __user *optval, int __user *optlen)
|
|
{
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
struct sctp_association *asoc;
|
|
u32 val = 0;
|
|
|
|
if (sctp_style(sk, TCP))
|
|
return -EOPNOTSUPP;
|
|
|
|
if (len < sizeof(u32))
|
|
return -EINVAL;
|
|
|
|
len = sizeof(u32);
|
|
|
|
list_for_each_entry(asoc, &(sp->ep->asocs), asocs) {
|
|
val++;
|
|
}
|
|
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
if (copy_to_user(optval, &val, len))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 8.1.23 SCTP_AUTO_ASCONF
|
|
* See the corresponding setsockopt entry as description
|
|
*/
|
|
static int sctp_getsockopt_auto_asconf(struct sock *sk, int len,
|
|
char __user *optval, int __user *optlen)
|
|
{
|
|
int val = 0;
|
|
|
|
if (len < sizeof(int))
|
|
return -EINVAL;
|
|
|
|
len = sizeof(int);
|
|
if (sctp_sk(sk)->do_auto_asconf && sctp_is_ep_boundall(sk))
|
|
val = 1;
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
if (copy_to_user(optval, &val, len))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 8.2.6. Get the Current Identifiers of Associations
|
|
* (SCTP_GET_ASSOC_ID_LIST)
|
|
*
|
|
* This option gets the current list of SCTP association identifiers of
|
|
* the SCTP associations handled by a one-to-many style socket.
|
|
*/
|
|
static int sctp_getsockopt_assoc_ids(struct sock *sk, int len,
|
|
char __user *optval, int __user *optlen)
|
|
{
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
struct sctp_association *asoc;
|
|
struct sctp_assoc_ids *ids;
|
|
u32 num = 0;
|
|
|
|
if (sctp_style(sk, TCP))
|
|
return -EOPNOTSUPP;
|
|
|
|
if (len < sizeof(struct sctp_assoc_ids))
|
|
return -EINVAL;
|
|
|
|
list_for_each_entry(asoc, &(sp->ep->asocs), asocs) {
|
|
num++;
|
|
}
|
|
|
|
if (len < sizeof(struct sctp_assoc_ids) + sizeof(sctp_assoc_t) * num)
|
|
return -EINVAL;
|
|
|
|
len = sizeof(struct sctp_assoc_ids) + sizeof(sctp_assoc_t) * num;
|
|
|
|
ids = kmalloc(len, GFP_USER | __GFP_NOWARN);
|
|
if (unlikely(!ids))
|
|
return -ENOMEM;
|
|
|
|
ids->gaids_number_of_ids = num;
|
|
num = 0;
|
|
list_for_each_entry(asoc, &(sp->ep->asocs), asocs) {
|
|
ids->gaids_assoc_id[num++] = asoc->assoc_id;
|
|
}
|
|
|
|
if (put_user(len, optlen) || copy_to_user(optval, ids, len)) {
|
|
kfree(ids);
|
|
return -EFAULT;
|
|
}
|
|
|
|
kfree(ids);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* SCTP_PEER_ADDR_THLDS
|
|
*
|
|
* This option allows us to fetch the partially failed threshold for one or all
|
|
* transports in an association. See Section 6.1 of:
|
|
* http://www.ietf.org/id/draft-nishida-tsvwg-sctp-failover-05.txt
|
|
*/
|
|
static int sctp_getsockopt_paddr_thresholds(struct sock *sk,
|
|
char __user *optval, int len,
|
|
int __user *optlen, bool v2)
|
|
{
|
|
struct sctp_paddrthlds_v2 val;
|
|
struct sctp_transport *trans;
|
|
struct sctp_association *asoc;
|
|
int min;
|
|
|
|
min = v2 ? sizeof(val) : sizeof(struct sctp_paddrthlds);
|
|
if (len < min)
|
|
return -EINVAL;
|
|
len = min;
|
|
if (copy_from_user(&val, optval, len))
|
|
return -EFAULT;
|
|
|
|
if (!sctp_is_any(sk, (const union sctp_addr *)&val.spt_address)) {
|
|
trans = sctp_addr_id2transport(sk, &val.spt_address,
|
|
val.spt_assoc_id);
|
|
if (!trans)
|
|
return -ENOENT;
|
|
|
|
val.spt_pathmaxrxt = trans->pathmaxrxt;
|
|
val.spt_pathpfthld = trans->pf_retrans;
|
|
val.spt_pathcpthld = trans->ps_retrans;
|
|
|
|
goto out;
|
|
}
|
|
|
|
asoc = sctp_id2assoc(sk, val.spt_assoc_id);
|
|
if (!asoc && val.spt_assoc_id != SCTP_FUTURE_ASSOC &&
|
|
sctp_style(sk, UDP))
|
|
return -EINVAL;
|
|
|
|
if (asoc) {
|
|
val.spt_pathpfthld = asoc->pf_retrans;
|
|
val.spt_pathmaxrxt = asoc->pathmaxrxt;
|
|
val.spt_pathcpthld = asoc->ps_retrans;
|
|
} else {
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
|
|
val.spt_pathpfthld = sp->pf_retrans;
|
|
val.spt_pathmaxrxt = sp->pathmaxrxt;
|
|
val.spt_pathcpthld = sp->ps_retrans;
|
|
}
|
|
|
|
out:
|
|
if (put_user(len, optlen) || copy_to_user(optval, &val, len))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* SCTP_GET_ASSOC_STATS
|
|
*
|
|
* This option retrieves local per endpoint statistics. It is modeled
|
|
* after OpenSolaris' implementation
|
|
*/
|
|
static int sctp_getsockopt_assoc_stats(struct sock *sk, int len,
|
|
char __user *optval,
|
|
int __user *optlen)
|
|
{
|
|
struct sctp_assoc_stats sas;
|
|
struct sctp_association *asoc = NULL;
|
|
|
|
/* User must provide at least the assoc id */
|
|
if (len < sizeof(sctp_assoc_t))
|
|
return -EINVAL;
|
|
|
|
/* Allow the struct to grow and fill in as much as possible */
|
|
len = min_t(size_t, len, sizeof(sas));
|
|
|
|
if (copy_from_user(&sas, optval, len))
|
|
return -EFAULT;
|
|
|
|
asoc = sctp_id2assoc(sk, sas.sas_assoc_id);
|
|
if (!asoc)
|
|
return -EINVAL;
|
|
|
|
sas.sas_rtxchunks = asoc->stats.rtxchunks;
|
|
sas.sas_gapcnt = asoc->stats.gapcnt;
|
|
sas.sas_outofseqtsns = asoc->stats.outofseqtsns;
|
|
sas.sas_osacks = asoc->stats.osacks;
|
|
sas.sas_isacks = asoc->stats.isacks;
|
|
sas.sas_octrlchunks = asoc->stats.octrlchunks;
|
|
sas.sas_ictrlchunks = asoc->stats.ictrlchunks;
|
|
sas.sas_oodchunks = asoc->stats.oodchunks;
|
|
sas.sas_iodchunks = asoc->stats.iodchunks;
|
|
sas.sas_ouodchunks = asoc->stats.ouodchunks;
|
|
sas.sas_iuodchunks = asoc->stats.iuodchunks;
|
|
sas.sas_idupchunks = asoc->stats.idupchunks;
|
|
sas.sas_opackets = asoc->stats.opackets;
|
|
sas.sas_ipackets = asoc->stats.ipackets;
|
|
|
|
/* New high max rto observed, will return 0 if not a single
|
|
* RTO update took place. obs_rto_ipaddr will be bogus
|
|
* in such a case
|
|
*/
|
|
sas.sas_maxrto = asoc->stats.max_obs_rto;
|
|
memcpy(&sas.sas_obs_rto_ipaddr, &asoc->stats.obs_rto_ipaddr,
|
|
sizeof(struct sockaddr_storage));
|
|
|
|
/* Mark beginning of a new observation period */
|
|
asoc->stats.max_obs_rto = asoc->rto_min;
|
|
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
|
|
pr_debug("%s: len:%d, assoc_id:%d\n", __func__, len, sas.sas_assoc_id);
|
|
|
|
if (copy_to_user(optval, &sas, len))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sctp_getsockopt_recvrcvinfo(struct sock *sk, int len,
|
|
char __user *optval,
|
|
int __user *optlen)
|
|
{
|
|
int val = 0;
|
|
|
|
if (len < sizeof(int))
|
|
return -EINVAL;
|
|
|
|
len = sizeof(int);
|
|
if (sctp_sk(sk)->recvrcvinfo)
|
|
val = 1;
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
if (copy_to_user(optval, &val, len))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sctp_getsockopt_recvnxtinfo(struct sock *sk, int len,
|
|
char __user *optval,
|
|
int __user *optlen)
|
|
{
|
|
int val = 0;
|
|
|
|
if (len < sizeof(int))
|
|
return -EINVAL;
|
|
|
|
len = sizeof(int);
|
|
if (sctp_sk(sk)->recvnxtinfo)
|
|
val = 1;
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
if (copy_to_user(optval, &val, len))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sctp_getsockopt_pr_supported(struct sock *sk, int len,
|
|
char __user *optval,
|
|
int __user *optlen)
|
|
{
|
|
struct sctp_assoc_value params;
|
|
struct sctp_association *asoc;
|
|
int retval = -EFAULT;
|
|
|
|
if (len < sizeof(params)) {
|
|
retval = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
len = sizeof(params);
|
|
if (copy_from_user(¶ms, optval, len))
|
|
goto out;
|
|
|
|
asoc = sctp_id2assoc(sk, params.assoc_id);
|
|
if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
|
|
sctp_style(sk, UDP)) {
|
|
retval = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
params.assoc_value = asoc ? asoc->peer.prsctp_capable
|
|
: sctp_sk(sk)->ep->prsctp_enable;
|
|
|
|
if (put_user(len, optlen))
|
|
goto out;
|
|
|
|
if (copy_to_user(optval, ¶ms, len))
|
|
goto out;
|
|
|
|
retval = 0;
|
|
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
static int sctp_getsockopt_default_prinfo(struct sock *sk, int len,
|
|
char __user *optval,
|
|
int __user *optlen)
|
|
{
|
|
struct sctp_default_prinfo info;
|
|
struct sctp_association *asoc;
|
|
int retval = -EFAULT;
|
|
|
|
if (len < sizeof(info)) {
|
|
retval = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
len = sizeof(info);
|
|
if (copy_from_user(&info, optval, len))
|
|
goto out;
|
|
|
|
asoc = sctp_id2assoc(sk, info.pr_assoc_id);
|
|
if (!asoc && info.pr_assoc_id != SCTP_FUTURE_ASSOC &&
|
|
sctp_style(sk, UDP)) {
|
|
retval = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (asoc) {
|
|
info.pr_policy = SCTP_PR_POLICY(asoc->default_flags);
|
|
info.pr_value = asoc->default_timetolive;
|
|
} else {
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
|
|
info.pr_policy = SCTP_PR_POLICY(sp->default_flags);
|
|
info.pr_value = sp->default_timetolive;
|
|
}
|
|
|
|
if (put_user(len, optlen))
|
|
goto out;
|
|
|
|
if (copy_to_user(optval, &info, len))
|
|
goto out;
|
|
|
|
retval = 0;
|
|
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
static int sctp_getsockopt_pr_assocstatus(struct sock *sk, int len,
|
|
char __user *optval,
|
|
int __user *optlen)
|
|
{
|
|
struct sctp_prstatus params;
|
|
struct sctp_association *asoc;
|
|
int policy;
|
|
int retval = -EINVAL;
|
|
|
|
if (len < sizeof(params))
|
|
goto out;
|
|
|
|
len = sizeof(params);
|
|
if (copy_from_user(¶ms, optval, len)) {
|
|
retval = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
policy = params.sprstat_policy;
|
|
if (!policy || (policy & ~(SCTP_PR_SCTP_MASK | SCTP_PR_SCTP_ALL)) ||
|
|
((policy & SCTP_PR_SCTP_ALL) && (policy & SCTP_PR_SCTP_MASK)))
|
|
goto out;
|
|
|
|
asoc = sctp_id2assoc(sk, params.sprstat_assoc_id);
|
|
if (!asoc)
|
|
goto out;
|
|
|
|
if (policy == SCTP_PR_SCTP_ALL) {
|
|
params.sprstat_abandoned_unsent = 0;
|
|
params.sprstat_abandoned_sent = 0;
|
|
for (policy = 0; policy <= SCTP_PR_INDEX(MAX); policy++) {
|
|
params.sprstat_abandoned_unsent +=
|
|
asoc->abandoned_unsent[policy];
|
|
params.sprstat_abandoned_sent +=
|
|
asoc->abandoned_sent[policy];
|
|
}
|
|
} else {
|
|
params.sprstat_abandoned_unsent =
|
|
asoc->abandoned_unsent[__SCTP_PR_INDEX(policy)];
|
|
params.sprstat_abandoned_sent =
|
|
asoc->abandoned_sent[__SCTP_PR_INDEX(policy)];
|
|
}
|
|
|
|
if (put_user(len, optlen)) {
|
|
retval = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
if (copy_to_user(optval, ¶ms, len)) {
|
|
retval = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
retval = 0;
|
|
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
static int sctp_getsockopt_pr_streamstatus(struct sock *sk, int len,
|
|
char __user *optval,
|
|
int __user *optlen)
|
|
{
|
|
struct sctp_stream_out_ext *streamoute;
|
|
struct sctp_association *asoc;
|
|
struct sctp_prstatus params;
|
|
int retval = -EINVAL;
|
|
int policy;
|
|
|
|
if (len < sizeof(params))
|
|
goto out;
|
|
|
|
len = sizeof(params);
|
|
if (copy_from_user(¶ms, optval, len)) {
|
|
retval = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
policy = params.sprstat_policy;
|
|
if (!policy || (policy & ~(SCTP_PR_SCTP_MASK | SCTP_PR_SCTP_ALL)) ||
|
|
((policy & SCTP_PR_SCTP_ALL) && (policy & SCTP_PR_SCTP_MASK)))
|
|
goto out;
|
|
|
|
asoc = sctp_id2assoc(sk, params.sprstat_assoc_id);
|
|
if (!asoc || params.sprstat_sid >= asoc->stream.outcnt)
|
|
goto out;
|
|
|
|
streamoute = SCTP_SO(&asoc->stream, params.sprstat_sid)->ext;
|
|
if (!streamoute) {
|
|
/* Not allocated yet, means all stats are 0 */
|
|
params.sprstat_abandoned_unsent = 0;
|
|
params.sprstat_abandoned_sent = 0;
|
|
retval = 0;
|
|
goto out;
|
|
}
|
|
|
|
if (policy == SCTP_PR_SCTP_ALL) {
|
|
params.sprstat_abandoned_unsent = 0;
|
|
params.sprstat_abandoned_sent = 0;
|
|
for (policy = 0; policy <= SCTP_PR_INDEX(MAX); policy++) {
|
|
params.sprstat_abandoned_unsent +=
|
|
streamoute->abandoned_unsent[policy];
|
|
params.sprstat_abandoned_sent +=
|
|
streamoute->abandoned_sent[policy];
|
|
}
|
|
} else {
|
|
params.sprstat_abandoned_unsent =
|
|
streamoute->abandoned_unsent[__SCTP_PR_INDEX(policy)];
|
|
params.sprstat_abandoned_sent =
|
|
streamoute->abandoned_sent[__SCTP_PR_INDEX(policy)];
|
|
}
|
|
|
|
if (put_user(len, optlen) || copy_to_user(optval, ¶ms, len)) {
|
|
retval = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
retval = 0;
|
|
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
static int sctp_getsockopt_reconfig_supported(struct sock *sk, int len,
|
|
char __user *optval,
|
|
int __user *optlen)
|
|
{
|
|
struct sctp_assoc_value params;
|
|
struct sctp_association *asoc;
|
|
int retval = -EFAULT;
|
|
|
|
if (len < sizeof(params)) {
|
|
retval = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
len = sizeof(params);
|
|
if (copy_from_user(¶ms, optval, len))
|
|
goto out;
|
|
|
|
asoc = sctp_id2assoc(sk, params.assoc_id);
|
|
if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
|
|
sctp_style(sk, UDP)) {
|
|
retval = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
params.assoc_value = asoc ? asoc->peer.reconf_capable
|
|
: sctp_sk(sk)->ep->reconf_enable;
|
|
|
|
if (put_user(len, optlen))
|
|
goto out;
|
|
|
|
if (copy_to_user(optval, ¶ms, len))
|
|
goto out;
|
|
|
|
retval = 0;
|
|
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
static int sctp_getsockopt_enable_strreset(struct sock *sk, int len,
|
|
char __user *optval,
|
|
int __user *optlen)
|
|
{
|
|
struct sctp_assoc_value params;
|
|
struct sctp_association *asoc;
|
|
int retval = -EFAULT;
|
|
|
|
if (len < sizeof(params)) {
|
|
retval = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
len = sizeof(params);
|
|
if (copy_from_user(¶ms, optval, len))
|
|
goto out;
|
|
|
|
asoc = sctp_id2assoc(sk, params.assoc_id);
|
|
if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
|
|
sctp_style(sk, UDP)) {
|
|
retval = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
params.assoc_value = asoc ? asoc->strreset_enable
|
|
: sctp_sk(sk)->ep->strreset_enable;
|
|
|
|
if (put_user(len, optlen))
|
|
goto out;
|
|
|
|
if (copy_to_user(optval, ¶ms, len))
|
|
goto out;
|
|
|
|
retval = 0;
|
|
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
static int sctp_getsockopt_scheduler(struct sock *sk, int len,
|
|
char __user *optval,
|
|
int __user *optlen)
|
|
{
|
|
struct sctp_assoc_value params;
|
|
struct sctp_association *asoc;
|
|
int retval = -EFAULT;
|
|
|
|
if (len < sizeof(params)) {
|
|
retval = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
len = sizeof(params);
|
|
if (copy_from_user(¶ms, optval, len))
|
|
goto out;
|
|
|
|
asoc = sctp_id2assoc(sk, params.assoc_id);
|
|
if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
|
|
sctp_style(sk, UDP)) {
|
|
retval = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
params.assoc_value = asoc ? sctp_sched_get_sched(asoc)
|
|
: sctp_sk(sk)->default_ss;
|
|
|
|
if (put_user(len, optlen))
|
|
goto out;
|
|
|
|
if (copy_to_user(optval, ¶ms, len))
|
|
goto out;
|
|
|
|
retval = 0;
|
|
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
static int sctp_getsockopt_scheduler_value(struct sock *sk, int len,
|
|
char __user *optval,
|
|
int __user *optlen)
|
|
{
|
|
struct sctp_stream_value params;
|
|
struct sctp_association *asoc;
|
|
int retval = -EFAULT;
|
|
|
|
if (len < sizeof(params)) {
|
|
retval = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
len = sizeof(params);
|
|
if (copy_from_user(¶ms, optval, len))
|
|
goto out;
|
|
|
|
asoc = sctp_id2assoc(sk, params.assoc_id);
|
|
if (!asoc) {
|
|
retval = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
retval = sctp_sched_get_value(asoc, params.stream_id,
|
|
¶ms.stream_value);
|
|
if (retval)
|
|
goto out;
|
|
|
|
if (put_user(len, optlen)) {
|
|
retval = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
if (copy_to_user(optval, ¶ms, len)) {
|
|
retval = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
static int sctp_getsockopt_interleaving_supported(struct sock *sk, int len,
|
|
char __user *optval,
|
|
int __user *optlen)
|
|
{
|
|
struct sctp_assoc_value params;
|
|
struct sctp_association *asoc;
|
|
int retval = -EFAULT;
|
|
|
|
if (len < sizeof(params)) {
|
|
retval = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
len = sizeof(params);
|
|
if (copy_from_user(¶ms, optval, len))
|
|
goto out;
|
|
|
|
asoc = sctp_id2assoc(sk, params.assoc_id);
|
|
if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
|
|
sctp_style(sk, UDP)) {
|
|
retval = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
params.assoc_value = asoc ? asoc->peer.intl_capable
|
|
: sctp_sk(sk)->ep->intl_enable;
|
|
|
|
if (put_user(len, optlen))
|
|
goto out;
|
|
|
|
if (copy_to_user(optval, ¶ms, len))
|
|
goto out;
|
|
|
|
retval = 0;
|
|
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
static int sctp_getsockopt_reuse_port(struct sock *sk, int len,
|
|
char __user *optval,
|
|
int __user *optlen)
|
|
{
|
|
int val;
|
|
|
|
if (len < sizeof(int))
|
|
return -EINVAL;
|
|
|
|
len = sizeof(int);
|
|
val = sctp_sk(sk)->reuse;
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
|
|
if (copy_to_user(optval, &val, len))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sctp_getsockopt_event(struct sock *sk, int len, char __user *optval,
|
|
int __user *optlen)
|
|
{
|
|
struct sctp_association *asoc;
|
|
struct sctp_event param;
|
|
__u16 subscribe;
|
|
|
|
if (len < sizeof(param))
|
|
return -EINVAL;
|
|
|
|
len = sizeof(param);
|
|
if (copy_from_user(¶m, optval, len))
|
|
return -EFAULT;
|
|
|
|
if (param.se_type < SCTP_SN_TYPE_BASE ||
|
|
param.se_type > SCTP_SN_TYPE_MAX)
|
|
return -EINVAL;
|
|
|
|
asoc = sctp_id2assoc(sk, param.se_assoc_id);
|
|
if (!asoc && param.se_assoc_id != SCTP_FUTURE_ASSOC &&
|
|
sctp_style(sk, UDP))
|
|
return -EINVAL;
|
|
|
|
subscribe = asoc ? asoc->subscribe : sctp_sk(sk)->subscribe;
|
|
param.se_on = sctp_ulpevent_type_enabled(subscribe, param.se_type);
|
|
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
|
|
if (copy_to_user(optval, ¶m, len))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sctp_getsockopt_asconf_supported(struct sock *sk, int len,
|
|
char __user *optval,
|
|
int __user *optlen)
|
|
{
|
|
struct sctp_assoc_value params;
|
|
struct sctp_association *asoc;
|
|
int retval = -EFAULT;
|
|
|
|
if (len < sizeof(params)) {
|
|
retval = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
len = sizeof(params);
|
|
if (copy_from_user(¶ms, optval, len))
|
|
goto out;
|
|
|
|
asoc = sctp_id2assoc(sk, params.assoc_id);
|
|
if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
|
|
sctp_style(sk, UDP)) {
|
|
retval = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
params.assoc_value = asoc ? asoc->peer.asconf_capable
|
|
: sctp_sk(sk)->ep->asconf_enable;
|
|
|
|
if (put_user(len, optlen))
|
|
goto out;
|
|
|
|
if (copy_to_user(optval, ¶ms, len))
|
|
goto out;
|
|
|
|
retval = 0;
|
|
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
static int sctp_getsockopt_auth_supported(struct sock *sk, int len,
|
|
char __user *optval,
|
|
int __user *optlen)
|
|
{
|
|
struct sctp_assoc_value params;
|
|
struct sctp_association *asoc;
|
|
int retval = -EFAULT;
|
|
|
|
if (len < sizeof(params)) {
|
|
retval = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
len = sizeof(params);
|
|
if (copy_from_user(¶ms, optval, len))
|
|
goto out;
|
|
|
|
asoc = sctp_id2assoc(sk, params.assoc_id);
|
|
if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
|
|
sctp_style(sk, UDP)) {
|
|
retval = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
params.assoc_value = asoc ? asoc->peer.auth_capable
|
|
: sctp_sk(sk)->ep->auth_enable;
|
|
|
|
if (put_user(len, optlen))
|
|
goto out;
|
|
|
|
if (copy_to_user(optval, ¶ms, len))
|
|
goto out;
|
|
|
|
retval = 0;
|
|
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
static int sctp_getsockopt_ecn_supported(struct sock *sk, int len,
|
|
char __user *optval,
|
|
int __user *optlen)
|
|
{
|
|
struct sctp_assoc_value params;
|
|
struct sctp_association *asoc;
|
|
int retval = -EFAULT;
|
|
|
|
if (len < sizeof(params)) {
|
|
retval = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
len = sizeof(params);
|
|
if (copy_from_user(¶ms, optval, len))
|
|
goto out;
|
|
|
|
asoc = sctp_id2assoc(sk, params.assoc_id);
|
|
if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
|
|
sctp_style(sk, UDP)) {
|
|
retval = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
params.assoc_value = asoc ? asoc->peer.ecn_capable
|
|
: sctp_sk(sk)->ep->ecn_enable;
|
|
|
|
if (put_user(len, optlen))
|
|
goto out;
|
|
|
|
if (copy_to_user(optval, ¶ms, len))
|
|
goto out;
|
|
|
|
retval = 0;
|
|
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
static int sctp_getsockopt_pf_expose(struct sock *sk, int len,
|
|
char __user *optval,
|
|
int __user *optlen)
|
|
{
|
|
struct sctp_assoc_value params;
|
|
struct sctp_association *asoc;
|
|
int retval = -EFAULT;
|
|
|
|
if (len < sizeof(params)) {
|
|
retval = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
len = sizeof(params);
|
|
if (copy_from_user(¶ms, optval, len))
|
|
goto out;
|
|
|
|
asoc = sctp_id2assoc(sk, params.assoc_id);
|
|
if (!asoc && params.assoc_id != SCTP_FUTURE_ASSOC &&
|
|
sctp_style(sk, UDP)) {
|
|
retval = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
params.assoc_value = asoc ? asoc->pf_expose
|
|
: sctp_sk(sk)->pf_expose;
|
|
|
|
if (put_user(len, optlen))
|
|
goto out;
|
|
|
|
if (copy_to_user(optval, ¶ms, len))
|
|
goto out;
|
|
|
|
retval = 0;
|
|
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
static int sctp_getsockopt_encap_port(struct sock *sk, int len,
|
|
char __user *optval, int __user *optlen)
|
|
{
|
|
struct sctp_association *asoc;
|
|
struct sctp_udpencaps encap;
|
|
struct sctp_transport *t;
|
|
__be16 encap_port;
|
|
|
|
if (len < sizeof(encap))
|
|
return -EINVAL;
|
|
|
|
len = sizeof(encap);
|
|
if (copy_from_user(&encap, optval, len))
|
|
return -EFAULT;
|
|
|
|
/* If an address other than INADDR_ANY is specified, and
|
|
* no transport is found, then the request is invalid.
|
|
*/
|
|
if (!sctp_is_any(sk, (union sctp_addr *)&encap.sue_address)) {
|
|
t = sctp_addr_id2transport(sk, &encap.sue_address,
|
|
encap.sue_assoc_id);
|
|
if (!t) {
|
|
pr_debug("%s: failed no transport\n", __func__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
encap_port = t->encap_port;
|
|
goto out;
|
|
}
|
|
|
|
/* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the
|
|
* socket is a one to many style socket, and an association
|
|
* was not found, then the id was invalid.
|
|
*/
|
|
asoc = sctp_id2assoc(sk, encap.sue_assoc_id);
|
|
if (!asoc && encap.sue_assoc_id != SCTP_FUTURE_ASSOC &&
|
|
sctp_style(sk, UDP)) {
|
|
pr_debug("%s: failed no association\n", __func__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (asoc) {
|
|
encap_port = asoc->encap_port;
|
|
goto out;
|
|
}
|
|
|
|
encap_port = sctp_sk(sk)->encap_port;
|
|
|
|
out:
|
|
encap.sue_port = (__force uint16_t)encap_port;
|
|
if (copy_to_user(optval, &encap, len))
|
|
return -EFAULT;
|
|
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sctp_getsockopt_probe_interval(struct sock *sk, int len,
|
|
char __user *optval,
|
|
int __user *optlen)
|
|
{
|
|
struct sctp_probeinterval params;
|
|
struct sctp_association *asoc;
|
|
struct sctp_transport *t;
|
|
__u32 probe_interval;
|
|
|
|
if (len < sizeof(params))
|
|
return -EINVAL;
|
|
|
|
len = sizeof(params);
|
|
if (copy_from_user(¶ms, optval, len))
|
|
return -EFAULT;
|
|
|
|
/* If an address other than INADDR_ANY is specified, and
|
|
* no transport is found, then the request is invalid.
|
|
*/
|
|
if (!sctp_is_any(sk, (union sctp_addr *)¶ms.spi_address)) {
|
|
t = sctp_addr_id2transport(sk, ¶ms.spi_address,
|
|
params.spi_assoc_id);
|
|
if (!t) {
|
|
pr_debug("%s: failed no transport\n", __func__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
probe_interval = jiffies_to_msecs(t->probe_interval);
|
|
goto out;
|
|
}
|
|
|
|
/* Get association, if assoc_id != SCTP_FUTURE_ASSOC and the
|
|
* socket is a one to many style socket, and an association
|
|
* was not found, then the id was invalid.
|
|
*/
|
|
asoc = sctp_id2assoc(sk, params.spi_assoc_id);
|
|
if (!asoc && params.spi_assoc_id != SCTP_FUTURE_ASSOC &&
|
|
sctp_style(sk, UDP)) {
|
|
pr_debug("%s: failed no association\n", __func__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (asoc) {
|
|
probe_interval = jiffies_to_msecs(asoc->probe_interval);
|
|
goto out;
|
|
}
|
|
|
|
probe_interval = sctp_sk(sk)->probe_interval;
|
|
|
|
out:
|
|
params.spi_interval = probe_interval;
|
|
if (copy_to_user(optval, ¶ms, len))
|
|
return -EFAULT;
|
|
|
|
if (put_user(len, optlen))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sctp_getsockopt(struct sock *sk, int level, int optname,
|
|
char __user *optval, int __user *optlen)
|
|
{
|
|
int retval = 0;
|
|
int len;
|
|
|
|
pr_debug("%s: sk:%p, optname:%d\n", __func__, sk, optname);
|
|
|
|
/* I can hardly begin to describe how wrong this is. This is
|
|
* so broken as to be worse than useless. The API draft
|
|
* REALLY is NOT helpful here... I am not convinced that the
|
|
* semantics of getsockopt() with a level OTHER THAN SOL_SCTP
|
|
* are at all well-founded.
|
|
*/
|
|
if (level != SOL_SCTP) {
|
|
struct sctp_af *af = sctp_sk(sk)->pf->af;
|
|
|
|
retval = af->getsockopt(sk, level, optname, optval, optlen);
|
|
return retval;
|
|
}
|
|
|
|
if (get_user(len, optlen))
|
|
return -EFAULT;
|
|
|
|
if (len < 0)
|
|
return -EINVAL;
|
|
|
|
lock_sock(sk);
|
|
|
|
switch (optname) {
|
|
case SCTP_STATUS:
|
|
retval = sctp_getsockopt_sctp_status(sk, len, optval, optlen);
|
|
break;
|
|
case SCTP_DISABLE_FRAGMENTS:
|
|
retval = sctp_getsockopt_disable_fragments(sk, len, optval,
|
|
optlen);
|
|
break;
|
|
case SCTP_EVENTS:
|
|
retval = sctp_getsockopt_events(sk, len, optval, optlen);
|
|
break;
|
|
case SCTP_AUTOCLOSE:
|
|
retval = sctp_getsockopt_autoclose(sk, len, optval, optlen);
|
|
break;
|
|
case SCTP_SOCKOPT_PEELOFF:
|
|
retval = sctp_getsockopt_peeloff(sk, len, optval, optlen);
|
|
break;
|
|
case SCTP_SOCKOPT_PEELOFF_FLAGS:
|
|
retval = sctp_getsockopt_peeloff_flags(sk, len, optval, optlen);
|
|
break;
|
|
case SCTP_PEER_ADDR_PARAMS:
|
|
retval = sctp_getsockopt_peer_addr_params(sk, len, optval,
|
|
optlen);
|
|
break;
|
|
case SCTP_DELAYED_SACK:
|
|
retval = sctp_getsockopt_delayed_ack(sk, len, optval,
|
|
optlen);
|
|
break;
|
|
case SCTP_INITMSG:
|
|
retval = sctp_getsockopt_initmsg(sk, len, optval, optlen);
|
|
break;
|
|
case SCTP_GET_PEER_ADDRS:
|
|
retval = sctp_getsockopt_peer_addrs(sk, len, optval,
|
|
optlen);
|
|
break;
|
|
case SCTP_GET_LOCAL_ADDRS:
|
|
retval = sctp_getsockopt_local_addrs(sk, len, optval,
|
|
optlen);
|
|
break;
|
|
case SCTP_SOCKOPT_CONNECTX3:
|
|
retval = sctp_getsockopt_connectx3(sk, len, optval, optlen);
|
|
break;
|
|
case SCTP_DEFAULT_SEND_PARAM:
|
|
retval = sctp_getsockopt_default_send_param(sk, len,
|
|
optval, optlen);
|
|
break;
|
|
case SCTP_DEFAULT_SNDINFO:
|
|
retval = sctp_getsockopt_default_sndinfo(sk, len,
|
|
optval, optlen);
|
|
break;
|
|
case SCTP_PRIMARY_ADDR:
|
|
retval = sctp_getsockopt_primary_addr(sk, len, optval, optlen);
|
|
break;
|
|
case SCTP_NODELAY:
|
|
retval = sctp_getsockopt_nodelay(sk, len, optval, optlen);
|
|
break;
|
|
case SCTP_RTOINFO:
|
|
retval = sctp_getsockopt_rtoinfo(sk, len, optval, optlen);
|
|
break;
|
|
case SCTP_ASSOCINFO:
|
|
retval = sctp_getsockopt_associnfo(sk, len, optval, optlen);
|
|
break;
|
|
case SCTP_I_WANT_MAPPED_V4_ADDR:
|
|
retval = sctp_getsockopt_mappedv4(sk, len, optval, optlen);
|
|
break;
|
|
case SCTP_MAXSEG:
|
|
retval = sctp_getsockopt_maxseg(sk, len, optval, optlen);
|
|
break;
|
|
case SCTP_GET_PEER_ADDR_INFO:
|
|
retval = sctp_getsockopt_peer_addr_info(sk, len, optval,
|
|
optlen);
|
|
break;
|
|
case SCTP_ADAPTATION_LAYER:
|
|
retval = sctp_getsockopt_adaptation_layer(sk, len, optval,
|
|
optlen);
|
|
break;
|
|
case SCTP_CONTEXT:
|
|
retval = sctp_getsockopt_context(sk, len, optval, optlen);
|
|
break;
|
|
case SCTP_FRAGMENT_INTERLEAVE:
|
|
retval = sctp_getsockopt_fragment_interleave(sk, len, optval,
|
|
optlen);
|
|
break;
|
|
case SCTP_PARTIAL_DELIVERY_POINT:
|
|
retval = sctp_getsockopt_partial_delivery_point(sk, len, optval,
|
|
optlen);
|
|
break;
|
|
case SCTP_MAX_BURST:
|
|
retval = sctp_getsockopt_maxburst(sk, len, optval, optlen);
|
|
break;
|
|
case SCTP_AUTH_KEY:
|
|
case SCTP_AUTH_CHUNK:
|
|
case SCTP_AUTH_DELETE_KEY:
|
|
case SCTP_AUTH_DEACTIVATE_KEY:
|
|
retval = -EOPNOTSUPP;
|
|
break;
|
|
case SCTP_HMAC_IDENT:
|
|
retval = sctp_getsockopt_hmac_ident(sk, len, optval, optlen);
|
|
break;
|
|
case SCTP_AUTH_ACTIVE_KEY:
|
|
retval = sctp_getsockopt_active_key(sk, len, optval, optlen);
|
|
break;
|
|
case SCTP_PEER_AUTH_CHUNKS:
|
|
retval = sctp_getsockopt_peer_auth_chunks(sk, len, optval,
|
|
optlen);
|
|
break;
|
|
case SCTP_LOCAL_AUTH_CHUNKS:
|
|
retval = sctp_getsockopt_local_auth_chunks(sk, len, optval,
|
|
optlen);
|
|
break;
|
|
case SCTP_GET_ASSOC_NUMBER:
|
|
retval = sctp_getsockopt_assoc_number(sk, len, optval, optlen);
|
|
break;
|
|
case SCTP_GET_ASSOC_ID_LIST:
|
|
retval = sctp_getsockopt_assoc_ids(sk, len, optval, optlen);
|
|
break;
|
|
case SCTP_AUTO_ASCONF:
|
|
retval = sctp_getsockopt_auto_asconf(sk, len, optval, optlen);
|
|
break;
|
|
case SCTP_PEER_ADDR_THLDS:
|
|
retval = sctp_getsockopt_paddr_thresholds(sk, optval, len,
|
|
optlen, false);
|
|
break;
|
|
case SCTP_PEER_ADDR_THLDS_V2:
|
|
retval = sctp_getsockopt_paddr_thresholds(sk, optval, len,
|
|
optlen, true);
|
|
break;
|
|
case SCTP_GET_ASSOC_STATS:
|
|
retval = sctp_getsockopt_assoc_stats(sk, len, optval, optlen);
|
|
break;
|
|
case SCTP_RECVRCVINFO:
|
|
retval = sctp_getsockopt_recvrcvinfo(sk, len, optval, optlen);
|
|
break;
|
|
case SCTP_RECVNXTINFO:
|
|
retval = sctp_getsockopt_recvnxtinfo(sk, len, optval, optlen);
|
|
break;
|
|
case SCTP_PR_SUPPORTED:
|
|
retval = sctp_getsockopt_pr_supported(sk, len, optval, optlen);
|
|
break;
|
|
case SCTP_DEFAULT_PRINFO:
|
|
retval = sctp_getsockopt_default_prinfo(sk, len, optval,
|
|
optlen);
|
|
break;
|
|
case SCTP_PR_ASSOC_STATUS:
|
|
retval = sctp_getsockopt_pr_assocstatus(sk, len, optval,
|
|
optlen);
|
|
break;
|
|
case SCTP_PR_STREAM_STATUS:
|
|
retval = sctp_getsockopt_pr_streamstatus(sk, len, optval,
|
|
optlen);
|
|
break;
|
|
case SCTP_RECONFIG_SUPPORTED:
|
|
retval = sctp_getsockopt_reconfig_supported(sk, len, optval,
|
|
optlen);
|
|
break;
|
|
case SCTP_ENABLE_STREAM_RESET:
|
|
retval = sctp_getsockopt_enable_strreset(sk, len, optval,
|
|
optlen);
|
|
break;
|
|
case SCTP_STREAM_SCHEDULER:
|
|
retval = sctp_getsockopt_scheduler(sk, len, optval,
|
|
optlen);
|
|
break;
|
|
case SCTP_STREAM_SCHEDULER_VALUE:
|
|
retval = sctp_getsockopt_scheduler_value(sk, len, optval,
|
|
optlen);
|
|
break;
|
|
case SCTP_INTERLEAVING_SUPPORTED:
|
|
retval = sctp_getsockopt_interleaving_supported(sk, len, optval,
|
|
optlen);
|
|
break;
|
|
case SCTP_REUSE_PORT:
|
|
retval = sctp_getsockopt_reuse_port(sk, len, optval, optlen);
|
|
break;
|
|
case SCTP_EVENT:
|
|
retval = sctp_getsockopt_event(sk, len, optval, optlen);
|
|
break;
|
|
case SCTP_ASCONF_SUPPORTED:
|
|
retval = sctp_getsockopt_asconf_supported(sk, len, optval,
|
|
optlen);
|
|
break;
|
|
case SCTP_AUTH_SUPPORTED:
|
|
retval = sctp_getsockopt_auth_supported(sk, len, optval,
|
|
optlen);
|
|
break;
|
|
case SCTP_ECN_SUPPORTED:
|
|
retval = sctp_getsockopt_ecn_supported(sk, len, optval, optlen);
|
|
break;
|
|
case SCTP_EXPOSE_POTENTIALLY_FAILED_STATE:
|
|
retval = sctp_getsockopt_pf_expose(sk, len, optval, optlen);
|
|
break;
|
|
case SCTP_REMOTE_UDP_ENCAPS_PORT:
|
|
retval = sctp_getsockopt_encap_port(sk, len, optval, optlen);
|
|
break;
|
|
case SCTP_PLPMTUD_PROBE_INTERVAL:
|
|
retval = sctp_getsockopt_probe_interval(sk, len, optval, optlen);
|
|
break;
|
|
default:
|
|
retval = -ENOPROTOOPT;
|
|
break;
|
|
}
|
|
|
|
release_sock(sk);
|
|
return retval;
|
|
}
|
|
|
|
static int sctp_hash(struct sock *sk)
|
|
{
|
|
/* STUB */
|
|
return 0;
|
|
}
|
|
|
|
static void sctp_unhash(struct sock *sk)
|
|
{
|
|
/* STUB */
|
|
}
|
|
|
|
/* Check if port is acceptable. Possibly find first available port.
|
|
*
|
|
* The port hash table (contained in the 'global' SCTP protocol storage
|
|
* returned by struct sctp_protocol *sctp_get_protocol()). The hash
|
|
* table is an array of 4096 lists (sctp_bind_hashbucket). Each
|
|
* list (the list number is the port number hashed out, so as you
|
|
* would expect from a hash function, all the ports in a given list have
|
|
* such a number that hashes out to the same list number; you were
|
|
* expecting that, right?); so each list has a set of ports, with a
|
|
* link to the socket (struct sock) that uses it, the port number and
|
|
* a fastreuse flag (FIXME: NPI ipg).
|
|
*/
|
|
static struct sctp_bind_bucket *sctp_bucket_create(
|
|
struct sctp_bind_hashbucket *head, struct net *, unsigned short snum);
|
|
|
|
static int sctp_get_port_local(struct sock *sk, union sctp_addr *addr)
|
|
{
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
bool reuse = (sk->sk_reuse || sp->reuse);
|
|
struct sctp_bind_hashbucket *head; /* hash list */
|
|
struct net *net = sock_net(sk);
|
|
kuid_t uid = sock_i_uid(sk);
|
|
struct sctp_bind_bucket *pp;
|
|
unsigned short snum;
|
|
int ret;
|
|
|
|
snum = ntohs(addr->v4.sin_port);
|
|
|
|
pr_debug("%s: begins, snum:%d\n", __func__, snum);
|
|
|
|
if (snum == 0) {
|
|
/* Search for an available port. */
|
|
int low, high, remaining, index;
|
|
unsigned int rover;
|
|
|
|
inet_get_local_port_range(net, &low, &high);
|
|
remaining = (high - low) + 1;
|
|
rover = prandom_u32() % remaining + low;
|
|
|
|
do {
|
|
rover++;
|
|
if ((rover < low) || (rover > high))
|
|
rover = low;
|
|
if (inet_is_local_reserved_port(net, rover))
|
|
continue;
|
|
index = sctp_phashfn(net, rover);
|
|
head = &sctp_port_hashtable[index];
|
|
spin_lock_bh(&head->lock);
|
|
sctp_for_each_hentry(pp, &head->chain)
|
|
if ((pp->port == rover) &&
|
|
net_eq(net, pp->net))
|
|
goto next;
|
|
break;
|
|
next:
|
|
spin_unlock_bh(&head->lock);
|
|
cond_resched();
|
|
} while (--remaining > 0);
|
|
|
|
/* Exhausted local port range during search? */
|
|
ret = 1;
|
|
if (remaining <= 0)
|
|
return ret;
|
|
|
|
/* OK, here is the one we will use. HEAD (the port
|
|
* hash table list entry) is non-NULL and we hold it's
|
|
* mutex.
|
|
*/
|
|
snum = rover;
|
|
} else {
|
|
/* We are given an specific port number; we verify
|
|
* that it is not being used. If it is used, we will
|
|
* exahust the search in the hash list corresponding
|
|
* to the port number (snum) - we detect that with the
|
|
* port iterator, pp being NULL.
|
|
*/
|
|
head = &sctp_port_hashtable[sctp_phashfn(net, snum)];
|
|
spin_lock_bh(&head->lock);
|
|
sctp_for_each_hentry(pp, &head->chain) {
|
|
if ((pp->port == snum) && net_eq(pp->net, net))
|
|
goto pp_found;
|
|
}
|
|
}
|
|
pp = NULL;
|
|
goto pp_not_found;
|
|
pp_found:
|
|
if (!hlist_empty(&pp->owner)) {
|
|
/* We had a port hash table hit - there is an
|
|
* available port (pp != NULL) and it is being
|
|
* used by other socket (pp->owner not empty); that other
|
|
* socket is going to be sk2.
|
|
*/
|
|
struct sock *sk2;
|
|
|
|
pr_debug("%s: found a possible match\n", __func__);
|
|
|
|
if ((pp->fastreuse && reuse &&
|
|
sk->sk_state != SCTP_SS_LISTENING) ||
|
|
(pp->fastreuseport && sk->sk_reuseport &&
|
|
uid_eq(pp->fastuid, uid)))
|
|
goto success;
|
|
|
|
/* Run through the list of sockets bound to the port
|
|
* (pp->port) [via the pointers bind_next and
|
|
* bind_pprev in the struct sock *sk2 (pp->sk)]. On each one,
|
|
* we get the endpoint they describe and run through
|
|
* the endpoint's list of IP (v4 or v6) addresses,
|
|
* comparing each of the addresses with the address of
|
|
* the socket sk. If we find a match, then that means
|
|
* that this port/socket (sk) combination are already
|
|
* in an endpoint.
|
|
*/
|
|
sk_for_each_bound(sk2, &pp->owner) {
|
|
struct sctp_sock *sp2 = sctp_sk(sk2);
|
|
struct sctp_endpoint *ep2 = sp2->ep;
|
|
|
|
if (sk == sk2 ||
|
|
(reuse && (sk2->sk_reuse || sp2->reuse) &&
|
|
sk2->sk_state != SCTP_SS_LISTENING) ||
|
|
(sk->sk_reuseport && sk2->sk_reuseport &&
|
|
uid_eq(uid, sock_i_uid(sk2))))
|
|
continue;
|
|
|
|
if (sctp_bind_addr_conflict(&ep2->base.bind_addr,
|
|
addr, sp2, sp)) {
|
|
ret = 1;
|
|
goto fail_unlock;
|
|
}
|
|
}
|
|
|
|
pr_debug("%s: found a match\n", __func__);
|
|
}
|
|
pp_not_found:
|
|
/* If there was a hash table miss, create a new port. */
|
|
ret = 1;
|
|
if (!pp && !(pp = sctp_bucket_create(head, net, snum)))
|
|
goto fail_unlock;
|
|
|
|
/* In either case (hit or miss), make sure fastreuse is 1 only
|
|
* if sk->sk_reuse is too (that is, if the caller requested
|
|
* SO_REUSEADDR on this socket -sk-).
|
|
*/
|
|
if (hlist_empty(&pp->owner)) {
|
|
if (reuse && sk->sk_state != SCTP_SS_LISTENING)
|
|
pp->fastreuse = 1;
|
|
else
|
|
pp->fastreuse = 0;
|
|
|
|
if (sk->sk_reuseport) {
|
|
pp->fastreuseport = 1;
|
|
pp->fastuid = uid;
|
|
} else {
|
|
pp->fastreuseport = 0;
|
|
}
|
|
} else {
|
|
if (pp->fastreuse &&
|
|
(!reuse || sk->sk_state == SCTP_SS_LISTENING))
|
|
pp->fastreuse = 0;
|
|
|
|
if (pp->fastreuseport &&
|
|
(!sk->sk_reuseport || !uid_eq(pp->fastuid, uid)))
|
|
pp->fastreuseport = 0;
|
|
}
|
|
|
|
/* We are set, so fill up all the data in the hash table
|
|
* entry, tie the socket list information with the rest of the
|
|
* sockets FIXME: Blurry, NPI (ipg).
|
|
*/
|
|
success:
|
|
if (!sp->bind_hash) {
|
|
inet_sk(sk)->inet_num = snum;
|
|
sk_add_bind_node(sk, &pp->owner);
|
|
sp->bind_hash = pp;
|
|
}
|
|
ret = 0;
|
|
|
|
fail_unlock:
|
|
spin_unlock_bh(&head->lock);
|
|
return ret;
|
|
}
|
|
|
|
/* Assign a 'snum' port to the socket. If snum == 0, an ephemeral
|
|
* port is requested.
|
|
*/
|
|
static int sctp_get_port(struct sock *sk, unsigned short snum)
|
|
{
|
|
union sctp_addr addr;
|
|
struct sctp_af *af = sctp_sk(sk)->pf->af;
|
|
|
|
/* Set up a dummy address struct from the sk. */
|
|
af->from_sk(&addr, sk);
|
|
addr.v4.sin_port = htons(snum);
|
|
|
|
/* Note: sk->sk_num gets filled in if ephemeral port request. */
|
|
return sctp_get_port_local(sk, &addr);
|
|
}
|
|
|
|
/*
|
|
* Move a socket to LISTENING state.
|
|
*/
|
|
static int sctp_listen_start(struct sock *sk, int backlog)
|
|
{
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
struct sctp_endpoint *ep = sp->ep;
|
|
struct crypto_shash *tfm = NULL;
|
|
char alg[32];
|
|
|
|
/* Allocate HMAC for generating cookie. */
|
|
if (!sp->hmac && sp->sctp_hmac_alg) {
|
|
sprintf(alg, "hmac(%s)", sp->sctp_hmac_alg);
|
|
tfm = crypto_alloc_shash(alg, 0, 0);
|
|
if (IS_ERR(tfm)) {
|
|
net_info_ratelimited("failed to load transform for %s: %ld\n",
|
|
sp->sctp_hmac_alg, PTR_ERR(tfm));
|
|
return -ENOSYS;
|
|
}
|
|
sctp_sk(sk)->hmac = tfm;
|
|
}
|
|
|
|
/*
|
|
* If a bind() or sctp_bindx() is not called prior to a listen()
|
|
* call that allows new associations to be accepted, the system
|
|
* picks an ephemeral port and will choose an address set equivalent
|
|
* to binding with a wildcard address.
|
|
*
|
|
* This is not currently spelled out in the SCTP sockets
|
|
* extensions draft, but follows the practice as seen in TCP
|
|
* sockets.
|
|
*
|
|
*/
|
|
inet_sk_set_state(sk, SCTP_SS_LISTENING);
|
|
if (!ep->base.bind_addr.port) {
|
|
if (sctp_autobind(sk))
|
|
return -EAGAIN;
|
|
} else {
|
|
if (sctp_get_port(sk, inet_sk(sk)->inet_num)) {
|
|
inet_sk_set_state(sk, SCTP_SS_CLOSED);
|
|
return -EADDRINUSE;
|
|
}
|
|
}
|
|
|
|
WRITE_ONCE(sk->sk_max_ack_backlog, backlog);
|
|
return sctp_hash_endpoint(ep);
|
|
}
|
|
|
|
/*
|
|
* 4.1.3 / 5.1.3 listen()
|
|
*
|
|
* By default, new associations are not accepted for UDP style sockets.
|
|
* An application uses listen() to mark a socket as being able to
|
|
* accept new associations.
|
|
*
|
|
* On TCP style sockets, applications use listen() to ready the SCTP
|
|
* endpoint for accepting inbound associations.
|
|
*
|
|
* On both types of endpoints a backlog of '0' disables listening.
|
|
*
|
|
* Move a socket to LISTENING state.
|
|
*/
|
|
int sctp_inet_listen(struct socket *sock, int backlog)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
struct sctp_endpoint *ep = sctp_sk(sk)->ep;
|
|
int err = -EINVAL;
|
|
|
|
if (unlikely(backlog < 0))
|
|
return err;
|
|
|
|
lock_sock(sk);
|
|
|
|
/* Peeled-off sockets are not allowed to listen(). */
|
|
if (sctp_style(sk, UDP_HIGH_BANDWIDTH))
|
|
goto out;
|
|
|
|
if (sock->state != SS_UNCONNECTED)
|
|
goto out;
|
|
|
|
if (!sctp_sstate(sk, LISTENING) && !sctp_sstate(sk, CLOSED))
|
|
goto out;
|
|
|
|
/* If backlog is zero, disable listening. */
|
|
if (!backlog) {
|
|
if (sctp_sstate(sk, CLOSED))
|
|
goto out;
|
|
|
|
err = 0;
|
|
sctp_unhash_endpoint(ep);
|
|
sk->sk_state = SCTP_SS_CLOSED;
|
|
if (sk->sk_reuse || sctp_sk(sk)->reuse)
|
|
sctp_sk(sk)->bind_hash->fastreuse = 1;
|
|
goto out;
|
|
}
|
|
|
|
/* If we are already listening, just update the backlog */
|
|
if (sctp_sstate(sk, LISTENING))
|
|
WRITE_ONCE(sk->sk_max_ack_backlog, backlog);
|
|
else {
|
|
err = sctp_listen_start(sk, backlog);
|
|
if (err)
|
|
goto out;
|
|
}
|
|
|
|
err = 0;
|
|
out:
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* This function is done by modeling the current datagram_poll() and the
|
|
* tcp_poll(). Note that, based on these implementations, we don't
|
|
* lock the socket in this function, even though it seems that,
|
|
* ideally, locking or some other mechanisms can be used to ensure
|
|
* the integrity of the counters (sndbuf and wmem_alloc) used
|
|
* in this place. We assume that we don't need locks either until proven
|
|
* otherwise.
|
|
*
|
|
* Another thing to note is that we include the Async I/O support
|
|
* here, again, by modeling the current TCP/UDP code. We don't have
|
|
* a good way to test with it yet.
|
|
*/
|
|
__poll_t sctp_poll(struct file *file, struct socket *sock, poll_table *wait)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
__poll_t mask;
|
|
|
|
poll_wait(file, sk_sleep(sk), wait);
|
|
|
|
sock_rps_record_flow(sk);
|
|
|
|
/* A TCP-style listening socket becomes readable when the accept queue
|
|
* is not empty.
|
|
*/
|
|
if (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING))
|
|
return (!list_empty(&sp->ep->asocs)) ?
|
|
(EPOLLIN | EPOLLRDNORM) : 0;
|
|
|
|
mask = 0;
|
|
|
|
/* Is there any exceptional events? */
|
|
if (sk->sk_err || !skb_queue_empty_lockless(&sk->sk_error_queue))
|
|
mask |= EPOLLERR |
|
|
(sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? EPOLLPRI : 0);
|
|
if (sk->sk_shutdown & RCV_SHUTDOWN)
|
|
mask |= EPOLLRDHUP | EPOLLIN | EPOLLRDNORM;
|
|
if (sk->sk_shutdown == SHUTDOWN_MASK)
|
|
mask |= EPOLLHUP;
|
|
|
|
/* Is it readable? Reconsider this code with TCP-style support. */
|
|
if (!skb_queue_empty_lockless(&sk->sk_receive_queue))
|
|
mask |= EPOLLIN | EPOLLRDNORM;
|
|
|
|
/* The association is either gone or not ready. */
|
|
if (!sctp_style(sk, UDP) && sctp_sstate(sk, CLOSED))
|
|
return mask;
|
|
|
|
/* Is it writable? */
|
|
if (sctp_writeable(sk)) {
|
|
mask |= EPOLLOUT | EPOLLWRNORM;
|
|
} else {
|
|
sk_set_bit(SOCKWQ_ASYNC_NOSPACE, sk);
|
|
/*
|
|
* Since the socket is not locked, the buffer
|
|
* might be made available after the writeable check and
|
|
* before the bit is set. This could cause a lost I/O
|
|
* signal. tcp_poll() has a race breaker for this race
|
|
* condition. Based on their implementation, we put
|
|
* in the following code to cover it as well.
|
|
*/
|
|
if (sctp_writeable(sk))
|
|
mask |= EPOLLOUT | EPOLLWRNORM;
|
|
}
|
|
return mask;
|
|
}
|
|
|
|
/********************************************************************
|
|
* 2nd Level Abstractions
|
|
********************************************************************/
|
|
|
|
static struct sctp_bind_bucket *sctp_bucket_create(
|
|
struct sctp_bind_hashbucket *head, struct net *net, unsigned short snum)
|
|
{
|
|
struct sctp_bind_bucket *pp;
|
|
|
|
pp = kmem_cache_alloc(sctp_bucket_cachep, GFP_ATOMIC);
|
|
if (pp) {
|
|
SCTP_DBG_OBJCNT_INC(bind_bucket);
|
|
pp->port = snum;
|
|
pp->fastreuse = 0;
|
|
INIT_HLIST_HEAD(&pp->owner);
|
|
pp->net = net;
|
|
hlist_add_head(&pp->node, &head->chain);
|
|
}
|
|
return pp;
|
|
}
|
|
|
|
/* Caller must hold hashbucket lock for this tb with local BH disabled */
|
|
static void sctp_bucket_destroy(struct sctp_bind_bucket *pp)
|
|
{
|
|
if (pp && hlist_empty(&pp->owner)) {
|
|
__hlist_del(&pp->node);
|
|
kmem_cache_free(sctp_bucket_cachep, pp);
|
|
SCTP_DBG_OBJCNT_DEC(bind_bucket);
|
|
}
|
|
}
|
|
|
|
/* Release this socket's reference to a local port. */
|
|
static inline void __sctp_put_port(struct sock *sk)
|
|
{
|
|
struct sctp_bind_hashbucket *head =
|
|
&sctp_port_hashtable[sctp_phashfn(sock_net(sk),
|
|
inet_sk(sk)->inet_num)];
|
|
struct sctp_bind_bucket *pp;
|
|
|
|
spin_lock(&head->lock);
|
|
pp = sctp_sk(sk)->bind_hash;
|
|
__sk_del_bind_node(sk);
|
|
sctp_sk(sk)->bind_hash = NULL;
|
|
inet_sk(sk)->inet_num = 0;
|
|
sctp_bucket_destroy(pp);
|
|
spin_unlock(&head->lock);
|
|
}
|
|
|
|
void sctp_put_port(struct sock *sk)
|
|
{
|
|
local_bh_disable();
|
|
__sctp_put_port(sk);
|
|
local_bh_enable();
|
|
}
|
|
|
|
/*
|
|
* The system picks an ephemeral port and choose an address set equivalent
|
|
* to binding with a wildcard address.
|
|
* One of those addresses will be the primary address for the association.
|
|
* This automatically enables the multihoming capability of SCTP.
|
|
*/
|
|
static int sctp_autobind(struct sock *sk)
|
|
{
|
|
union sctp_addr autoaddr;
|
|
struct sctp_af *af;
|
|
__be16 port;
|
|
|
|
/* Initialize a local sockaddr structure to INADDR_ANY. */
|
|
af = sctp_sk(sk)->pf->af;
|
|
|
|
port = htons(inet_sk(sk)->inet_num);
|
|
af->inaddr_any(&autoaddr, port);
|
|
|
|
return sctp_do_bind(sk, &autoaddr, af->sockaddr_len);
|
|
}
|
|
|
|
/* Parse out IPPROTO_SCTP CMSG headers. Perform only minimal validation.
|
|
*
|
|
* From RFC 2292
|
|
* 4.2 The cmsghdr Structure *
|
|
*
|
|
* When ancillary data is sent or received, any number of ancillary data
|
|
* objects can be specified by the msg_control and msg_controllen members of
|
|
* the msghdr structure, because each object is preceded by
|
|
* a cmsghdr structure defining the object's length (the cmsg_len member).
|
|
* Historically Berkeley-derived implementations have passed only one object
|
|
* at a time, but this API allows multiple objects to be
|
|
* passed in a single call to sendmsg() or recvmsg(). The following example
|
|
* shows two ancillary data objects in a control buffer.
|
|
*
|
|
* |<--------------------------- msg_controllen -------------------------->|
|
|
* | |
|
|
*
|
|
* |<----- ancillary data object ----->|<----- ancillary data object ----->|
|
|
*
|
|
* |<---------- CMSG_SPACE() --------->|<---------- CMSG_SPACE() --------->|
|
|
* | | |
|
|
*
|
|
* |<---------- cmsg_len ---------->| |<--------- cmsg_len ----------->| |
|
|
*
|
|
* |<--------- CMSG_LEN() --------->| |<-------- CMSG_LEN() ---------->| |
|
|
* | | | | |
|
|
*
|
|
* +-----+-----+-----+--+-----------+--+-----+-----+-----+--+-----------+--+
|
|
* |cmsg_|cmsg_|cmsg_|XX| |XX|cmsg_|cmsg_|cmsg_|XX| |XX|
|
|
*
|
|
* |len |level|type |XX|cmsg_data[]|XX|len |level|type |XX|cmsg_data[]|XX|
|
|
*
|
|
* +-----+-----+-----+--+-----------+--+-----+-----+-----+--+-----------+--+
|
|
* ^
|
|
* |
|
|
*
|
|
* msg_control
|
|
* points here
|
|
*/
|
|
static int sctp_msghdr_parse(const struct msghdr *msg, struct sctp_cmsgs *cmsgs)
|
|
{
|
|
struct msghdr *my_msg = (struct msghdr *)msg;
|
|
struct cmsghdr *cmsg;
|
|
|
|
for_each_cmsghdr(cmsg, my_msg) {
|
|
if (!CMSG_OK(my_msg, cmsg))
|
|
return -EINVAL;
|
|
|
|
/* Should we parse this header or ignore? */
|
|
if (cmsg->cmsg_level != IPPROTO_SCTP)
|
|
continue;
|
|
|
|
/* Strictly check lengths following example in SCM code. */
|
|
switch (cmsg->cmsg_type) {
|
|
case SCTP_INIT:
|
|
/* SCTP Socket API Extension
|
|
* 5.3.1 SCTP Initiation Structure (SCTP_INIT)
|
|
*
|
|
* This cmsghdr structure provides information for
|
|
* initializing new SCTP associations with sendmsg().
|
|
* The SCTP_INITMSG socket option uses this same data
|
|
* structure. This structure is not used for
|
|
* recvmsg().
|
|
*
|
|
* cmsg_level cmsg_type cmsg_data[]
|
|
* ------------ ------------ ----------------------
|
|
* IPPROTO_SCTP SCTP_INIT struct sctp_initmsg
|
|
*/
|
|
if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct sctp_initmsg)))
|
|
return -EINVAL;
|
|
|
|
cmsgs->init = CMSG_DATA(cmsg);
|
|
break;
|
|
|
|
case SCTP_SNDRCV:
|
|
/* SCTP Socket API Extension
|
|
* 5.3.2 SCTP Header Information Structure(SCTP_SNDRCV)
|
|
*
|
|
* This cmsghdr structure specifies SCTP options for
|
|
* sendmsg() and describes SCTP header information
|
|
* about a received message through recvmsg().
|
|
*
|
|
* cmsg_level cmsg_type cmsg_data[]
|
|
* ------------ ------------ ----------------------
|
|
* IPPROTO_SCTP SCTP_SNDRCV struct sctp_sndrcvinfo
|
|
*/
|
|
if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct sctp_sndrcvinfo)))
|
|
return -EINVAL;
|
|
|
|
cmsgs->srinfo = CMSG_DATA(cmsg);
|
|
|
|
if (cmsgs->srinfo->sinfo_flags &
|
|
~(SCTP_UNORDERED | SCTP_ADDR_OVER |
|
|
SCTP_SACK_IMMEDIATELY | SCTP_SENDALL |
|
|
SCTP_PR_SCTP_MASK | SCTP_ABORT | SCTP_EOF))
|
|
return -EINVAL;
|
|
break;
|
|
|
|
case SCTP_SNDINFO:
|
|
/* SCTP Socket API Extension
|
|
* 5.3.4 SCTP Send Information Structure (SCTP_SNDINFO)
|
|
*
|
|
* This cmsghdr structure specifies SCTP options for
|
|
* sendmsg(). This structure and SCTP_RCVINFO replaces
|
|
* SCTP_SNDRCV which has been deprecated.
|
|
*
|
|
* cmsg_level cmsg_type cmsg_data[]
|
|
* ------------ ------------ ---------------------
|
|
* IPPROTO_SCTP SCTP_SNDINFO struct sctp_sndinfo
|
|
*/
|
|
if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct sctp_sndinfo)))
|
|
return -EINVAL;
|
|
|
|
cmsgs->sinfo = CMSG_DATA(cmsg);
|
|
|
|
if (cmsgs->sinfo->snd_flags &
|
|
~(SCTP_UNORDERED | SCTP_ADDR_OVER |
|
|
SCTP_SACK_IMMEDIATELY | SCTP_SENDALL |
|
|
SCTP_PR_SCTP_MASK | SCTP_ABORT | SCTP_EOF))
|
|
return -EINVAL;
|
|
break;
|
|
case SCTP_PRINFO:
|
|
/* SCTP Socket API Extension
|
|
* 5.3.7 SCTP PR-SCTP Information Structure (SCTP_PRINFO)
|
|
*
|
|
* This cmsghdr structure specifies SCTP options for sendmsg().
|
|
*
|
|
* cmsg_level cmsg_type cmsg_data[]
|
|
* ------------ ------------ ---------------------
|
|
* IPPROTO_SCTP SCTP_PRINFO struct sctp_prinfo
|
|
*/
|
|
if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct sctp_prinfo)))
|
|
return -EINVAL;
|
|
|
|
cmsgs->prinfo = CMSG_DATA(cmsg);
|
|
if (cmsgs->prinfo->pr_policy & ~SCTP_PR_SCTP_MASK)
|
|
return -EINVAL;
|
|
|
|
if (cmsgs->prinfo->pr_policy == SCTP_PR_SCTP_NONE)
|
|
cmsgs->prinfo->pr_value = 0;
|
|
break;
|
|
case SCTP_AUTHINFO:
|
|
/* SCTP Socket API Extension
|
|
* 5.3.8 SCTP AUTH Information Structure (SCTP_AUTHINFO)
|
|
*
|
|
* This cmsghdr structure specifies SCTP options for sendmsg().
|
|
*
|
|
* cmsg_level cmsg_type cmsg_data[]
|
|
* ------------ ------------ ---------------------
|
|
* IPPROTO_SCTP SCTP_AUTHINFO struct sctp_authinfo
|
|
*/
|
|
if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct sctp_authinfo)))
|
|
return -EINVAL;
|
|
|
|
cmsgs->authinfo = CMSG_DATA(cmsg);
|
|
break;
|
|
case SCTP_DSTADDRV4:
|
|
case SCTP_DSTADDRV6:
|
|
/* SCTP Socket API Extension
|
|
* 5.3.9/10 SCTP Destination IPv4/6 Address Structure (SCTP_DSTADDRV4/6)
|
|
*
|
|
* This cmsghdr structure specifies SCTP options for sendmsg().
|
|
*
|
|
* cmsg_level cmsg_type cmsg_data[]
|
|
* ------------ ------------ ---------------------
|
|
* IPPROTO_SCTP SCTP_DSTADDRV4 struct in_addr
|
|
* ------------ ------------ ---------------------
|
|
* IPPROTO_SCTP SCTP_DSTADDRV6 struct in6_addr
|
|
*/
|
|
cmsgs->addrs_msg = my_msg;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Wait for a packet..
|
|
* Note: This function is the same function as in core/datagram.c
|
|
* with a few modifications to make lksctp work.
|
|
*/
|
|
static int sctp_wait_for_packet(struct sock *sk, int *err, long *timeo_p)
|
|
{
|
|
int error;
|
|
DEFINE_WAIT(wait);
|
|
|
|
prepare_to_wait_exclusive(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
|
|
|
|
/* Socket errors? */
|
|
error = sock_error(sk);
|
|
if (error)
|
|
goto out;
|
|
|
|
if (!skb_queue_empty(&sk->sk_receive_queue))
|
|
goto ready;
|
|
|
|
/* Socket shut down? */
|
|
if (sk->sk_shutdown & RCV_SHUTDOWN)
|
|
goto out;
|
|
|
|
/* Sequenced packets can come disconnected. If so we report the
|
|
* problem.
|
|
*/
|
|
error = -ENOTCONN;
|
|
|
|
/* Is there a good reason to think that we may receive some data? */
|
|
if (list_empty(&sctp_sk(sk)->ep->asocs) && !sctp_sstate(sk, LISTENING))
|
|
goto out;
|
|
|
|
/* Handle signals. */
|
|
if (signal_pending(current))
|
|
goto interrupted;
|
|
|
|
/* Let another process have a go. Since we are going to sleep
|
|
* anyway. Note: This may cause odd behaviors if the message
|
|
* does not fit in the user's buffer, but this seems to be the
|
|
* only way to honor MSG_DONTWAIT realistically.
|
|
*/
|
|
release_sock(sk);
|
|
*timeo_p = schedule_timeout(*timeo_p);
|
|
lock_sock(sk);
|
|
|
|
ready:
|
|
finish_wait(sk_sleep(sk), &wait);
|
|
return 0;
|
|
|
|
interrupted:
|
|
error = sock_intr_errno(*timeo_p);
|
|
|
|
out:
|
|
finish_wait(sk_sleep(sk), &wait);
|
|
*err = error;
|
|
return error;
|
|
}
|
|
|
|
/* Receive a datagram.
|
|
* Note: This is pretty much the same routine as in core/datagram.c
|
|
* with a few changes to make lksctp work.
|
|
*/
|
|
struct sk_buff *sctp_skb_recv_datagram(struct sock *sk, int flags,
|
|
int noblock, int *err)
|
|
{
|
|
int error;
|
|
struct sk_buff *skb;
|
|
long timeo;
|
|
|
|
timeo = sock_rcvtimeo(sk, noblock);
|
|
|
|
pr_debug("%s: timeo:%ld, max:%ld\n", __func__, timeo,
|
|
MAX_SCHEDULE_TIMEOUT);
|
|
|
|
do {
|
|
/* Again only user level code calls this function,
|
|
* so nothing interrupt level
|
|
* will suddenly eat the receive_queue.
|
|
*
|
|
* Look at current nfs client by the way...
|
|
* However, this function was correct in any case. 8)
|
|
*/
|
|
if (flags & MSG_PEEK) {
|
|
skb = skb_peek(&sk->sk_receive_queue);
|
|
if (skb)
|
|
refcount_inc(&skb->users);
|
|
} else {
|
|
skb = __skb_dequeue(&sk->sk_receive_queue);
|
|
}
|
|
|
|
if (skb)
|
|
return skb;
|
|
|
|
/* Caller is allowed not to check sk->sk_err before calling. */
|
|
error = sock_error(sk);
|
|
if (error)
|
|
goto no_packet;
|
|
|
|
if (sk->sk_shutdown & RCV_SHUTDOWN)
|
|
break;
|
|
|
|
if (sk_can_busy_loop(sk)) {
|
|
sk_busy_loop(sk, noblock);
|
|
|
|
if (!skb_queue_empty_lockless(&sk->sk_receive_queue))
|
|
continue;
|
|
}
|
|
|
|
/* User doesn't want to wait. */
|
|
error = -EAGAIN;
|
|
if (!timeo)
|
|
goto no_packet;
|
|
} while (sctp_wait_for_packet(sk, err, &timeo) == 0);
|
|
|
|
return NULL;
|
|
|
|
no_packet:
|
|
*err = error;
|
|
return NULL;
|
|
}
|
|
|
|
/* If sndbuf has changed, wake up per association sndbuf waiters. */
|
|
static void __sctp_write_space(struct sctp_association *asoc)
|
|
{
|
|
struct sock *sk = asoc->base.sk;
|
|
|
|
if (sctp_wspace(asoc) <= 0)
|
|
return;
|
|
|
|
if (waitqueue_active(&asoc->wait))
|
|
wake_up_interruptible(&asoc->wait);
|
|
|
|
if (sctp_writeable(sk)) {
|
|
struct socket_wq *wq;
|
|
|
|
rcu_read_lock();
|
|
wq = rcu_dereference(sk->sk_wq);
|
|
if (wq) {
|
|
if (waitqueue_active(&wq->wait))
|
|
wake_up_interruptible(&wq->wait);
|
|
|
|
/* Note that we try to include the Async I/O support
|
|
* here by modeling from the current TCP/UDP code.
|
|
* We have not tested with it yet.
|
|
*/
|
|
if (!(sk->sk_shutdown & SEND_SHUTDOWN))
|
|
sock_wake_async(wq, SOCK_WAKE_SPACE, POLL_OUT);
|
|
}
|
|
rcu_read_unlock();
|
|
}
|
|
}
|
|
|
|
static void sctp_wake_up_waiters(struct sock *sk,
|
|
struct sctp_association *asoc)
|
|
{
|
|
struct sctp_association *tmp = asoc;
|
|
|
|
/* We do accounting for the sndbuf space per association,
|
|
* so we only need to wake our own association.
|
|
*/
|
|
if (asoc->ep->sndbuf_policy)
|
|
return __sctp_write_space(asoc);
|
|
|
|
/* If association goes down and is just flushing its
|
|
* outq, then just normally notify others.
|
|
*/
|
|
if (asoc->base.dead)
|
|
return sctp_write_space(sk);
|
|
|
|
/* Accounting for the sndbuf space is per socket, so we
|
|
* need to wake up others, try to be fair and in case of
|
|
* other associations, let them have a go first instead
|
|
* of just doing a sctp_write_space() call.
|
|
*
|
|
* Note that we reach sctp_wake_up_waiters() only when
|
|
* associations free up queued chunks, thus we are under
|
|
* lock and the list of associations on a socket is
|
|
* guaranteed not to change.
|
|
*/
|
|
for (tmp = list_next_entry(tmp, asocs); 1;
|
|
tmp = list_next_entry(tmp, asocs)) {
|
|
/* Manually skip the head element. */
|
|
if (&tmp->asocs == &((sctp_sk(sk))->ep->asocs))
|
|
continue;
|
|
/* Wake up association. */
|
|
__sctp_write_space(tmp);
|
|
/* We've reached the end. */
|
|
if (tmp == asoc)
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Do accounting for the sndbuf space.
|
|
* Decrement the used sndbuf space of the corresponding association by the
|
|
* data size which was just transmitted(freed).
|
|
*/
|
|
static void sctp_wfree(struct sk_buff *skb)
|
|
{
|
|
struct sctp_chunk *chunk = skb_shinfo(skb)->destructor_arg;
|
|
struct sctp_association *asoc = chunk->asoc;
|
|
struct sock *sk = asoc->base.sk;
|
|
|
|
sk_mem_uncharge(sk, skb->truesize);
|
|
sk->sk_wmem_queued -= skb->truesize + sizeof(struct sctp_chunk);
|
|
asoc->sndbuf_used -= skb->truesize + sizeof(struct sctp_chunk);
|
|
WARN_ON(refcount_sub_and_test(sizeof(struct sctp_chunk),
|
|
&sk->sk_wmem_alloc));
|
|
|
|
if (chunk->shkey) {
|
|
struct sctp_shared_key *shkey = chunk->shkey;
|
|
|
|
/* refcnt == 2 and !list_empty mean after this release, it's
|
|
* not being used anywhere, and it's time to notify userland
|
|
* that this shkey can be freed if it's been deactivated.
|
|
*/
|
|
if (shkey->deactivated && !list_empty(&shkey->key_list) &&
|
|
refcount_read(&shkey->refcnt) == 2) {
|
|
struct sctp_ulpevent *ev;
|
|
|
|
ev = sctp_ulpevent_make_authkey(asoc, shkey->key_id,
|
|
SCTP_AUTH_FREE_KEY,
|
|
GFP_KERNEL);
|
|
if (ev)
|
|
asoc->stream.si->enqueue_event(&asoc->ulpq, ev);
|
|
}
|
|
sctp_auth_shkey_release(chunk->shkey);
|
|
}
|
|
|
|
sock_wfree(skb);
|
|
sctp_wake_up_waiters(sk, asoc);
|
|
|
|
sctp_association_put(asoc);
|
|
}
|
|
|
|
/* Do accounting for the receive space on the socket.
|
|
* Accounting for the association is done in ulpevent.c
|
|
* We set this as a destructor for the cloned data skbs so that
|
|
* accounting is done at the correct time.
|
|
*/
|
|
void sctp_sock_rfree(struct sk_buff *skb)
|
|
{
|
|
struct sock *sk = skb->sk;
|
|
struct sctp_ulpevent *event = sctp_skb2event(skb);
|
|
|
|
atomic_sub(event->rmem_len, &sk->sk_rmem_alloc);
|
|
|
|
/*
|
|
* Mimic the behavior of sock_rfree
|
|
*/
|
|
sk_mem_uncharge(sk, event->rmem_len);
|
|
}
|
|
|
|
|
|
/* Helper function to wait for space in the sndbuf. */
|
|
static int sctp_wait_for_sndbuf(struct sctp_association *asoc, long *timeo_p,
|
|
size_t msg_len)
|
|
{
|
|
struct sock *sk = asoc->base.sk;
|
|
long current_timeo = *timeo_p;
|
|
DEFINE_WAIT(wait);
|
|
int err = 0;
|
|
|
|
pr_debug("%s: asoc:%p, timeo:%ld, msg_len:%zu\n", __func__, asoc,
|
|
*timeo_p, msg_len);
|
|
|
|
/* Increment the association's refcnt. */
|
|
sctp_association_hold(asoc);
|
|
|
|
/* Wait on the association specific sndbuf space. */
|
|
for (;;) {
|
|
prepare_to_wait_exclusive(&asoc->wait, &wait,
|
|
TASK_INTERRUPTIBLE);
|
|
if (asoc->base.dead)
|
|
goto do_dead;
|
|
if (!*timeo_p)
|
|
goto do_nonblock;
|
|
if (sk->sk_err || asoc->state >= SCTP_STATE_SHUTDOWN_PENDING)
|
|
goto do_error;
|
|
if (signal_pending(current))
|
|
goto do_interrupted;
|
|
if (sk_under_memory_pressure(sk))
|
|
sk_mem_reclaim(sk);
|
|
if ((int)msg_len <= sctp_wspace(asoc) &&
|
|
sk_wmem_schedule(sk, msg_len))
|
|
break;
|
|
|
|
/* Let another process have a go. Since we are going
|
|
* to sleep anyway.
|
|
*/
|
|
release_sock(sk);
|
|
current_timeo = schedule_timeout(current_timeo);
|
|
lock_sock(sk);
|
|
if (sk != asoc->base.sk)
|
|
goto do_error;
|
|
|
|
*timeo_p = current_timeo;
|
|
}
|
|
|
|
out:
|
|
finish_wait(&asoc->wait, &wait);
|
|
|
|
/* Release the association's refcnt. */
|
|
sctp_association_put(asoc);
|
|
|
|
return err;
|
|
|
|
do_dead:
|
|
err = -ESRCH;
|
|
goto out;
|
|
|
|
do_error:
|
|
err = -EPIPE;
|
|
goto out;
|
|
|
|
do_interrupted:
|
|
err = sock_intr_errno(*timeo_p);
|
|
goto out;
|
|
|
|
do_nonblock:
|
|
err = -EAGAIN;
|
|
goto out;
|
|
}
|
|
|
|
void sctp_data_ready(struct sock *sk)
|
|
{
|
|
struct socket_wq *wq;
|
|
|
|
rcu_read_lock();
|
|
wq = rcu_dereference(sk->sk_wq);
|
|
if (skwq_has_sleeper(wq))
|
|
wake_up_interruptible_sync_poll(&wq->wait, EPOLLIN |
|
|
EPOLLRDNORM | EPOLLRDBAND);
|
|
sk_wake_async(sk, SOCK_WAKE_WAITD, POLL_IN);
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
/* If socket sndbuf has changed, wake up all per association waiters. */
|
|
void sctp_write_space(struct sock *sk)
|
|
{
|
|
struct sctp_association *asoc;
|
|
|
|
/* Wake up the tasks in each wait queue. */
|
|
list_for_each_entry(asoc, &((sctp_sk(sk))->ep->asocs), asocs) {
|
|
__sctp_write_space(asoc);
|
|
}
|
|
}
|
|
|
|
/* Is there any sndbuf space available on the socket?
|
|
*
|
|
* Note that sk_wmem_alloc is the sum of the send buffers on all of the
|
|
* associations on the same socket. For a UDP-style socket with
|
|
* multiple associations, it is possible for it to be "unwriteable"
|
|
* prematurely. I assume that this is acceptable because
|
|
* a premature "unwriteable" is better than an accidental "writeable" which
|
|
* would cause an unwanted block under certain circumstances. For the 1-1
|
|
* UDP-style sockets or TCP-style sockets, this code should work.
|
|
* - Daisy
|
|
*/
|
|
static bool sctp_writeable(struct sock *sk)
|
|
{
|
|
return sk->sk_sndbuf > sk->sk_wmem_queued;
|
|
}
|
|
|
|
/* Wait for an association to go into ESTABLISHED state. If timeout is 0,
|
|
* returns immediately with EINPROGRESS.
|
|
*/
|
|
static int sctp_wait_for_connect(struct sctp_association *asoc, long *timeo_p)
|
|
{
|
|
struct sock *sk = asoc->base.sk;
|
|
int err = 0;
|
|
long current_timeo = *timeo_p;
|
|
DEFINE_WAIT(wait);
|
|
|
|
pr_debug("%s: asoc:%p, timeo:%ld\n", __func__, asoc, *timeo_p);
|
|
|
|
/* Increment the association's refcnt. */
|
|
sctp_association_hold(asoc);
|
|
|
|
for (;;) {
|
|
prepare_to_wait_exclusive(&asoc->wait, &wait,
|
|
TASK_INTERRUPTIBLE);
|
|
if (!*timeo_p)
|
|
goto do_nonblock;
|
|
if (sk->sk_shutdown & RCV_SHUTDOWN)
|
|
break;
|
|
if (sk->sk_err || asoc->state >= SCTP_STATE_SHUTDOWN_PENDING ||
|
|
asoc->base.dead)
|
|
goto do_error;
|
|
if (signal_pending(current))
|
|
goto do_interrupted;
|
|
|
|
if (sctp_state(asoc, ESTABLISHED))
|
|
break;
|
|
|
|
/* Let another process have a go. Since we are going
|
|
* to sleep anyway.
|
|
*/
|
|
release_sock(sk);
|
|
current_timeo = schedule_timeout(current_timeo);
|
|
lock_sock(sk);
|
|
|
|
*timeo_p = current_timeo;
|
|
}
|
|
|
|
out:
|
|
finish_wait(&asoc->wait, &wait);
|
|
|
|
/* Release the association's refcnt. */
|
|
sctp_association_put(asoc);
|
|
|
|
return err;
|
|
|
|
do_error:
|
|
if (asoc->init_err_counter + 1 > asoc->max_init_attempts)
|
|
err = -ETIMEDOUT;
|
|
else
|
|
err = -ECONNREFUSED;
|
|
goto out;
|
|
|
|
do_interrupted:
|
|
err = sock_intr_errno(*timeo_p);
|
|
goto out;
|
|
|
|
do_nonblock:
|
|
err = -EINPROGRESS;
|
|
goto out;
|
|
}
|
|
|
|
static int sctp_wait_for_accept(struct sock *sk, long timeo)
|
|
{
|
|
struct sctp_endpoint *ep;
|
|
int err = 0;
|
|
DEFINE_WAIT(wait);
|
|
|
|
ep = sctp_sk(sk)->ep;
|
|
|
|
|
|
for (;;) {
|
|
prepare_to_wait_exclusive(sk_sleep(sk), &wait,
|
|
TASK_INTERRUPTIBLE);
|
|
|
|
if (list_empty(&ep->asocs)) {
|
|
release_sock(sk);
|
|
timeo = schedule_timeout(timeo);
|
|
lock_sock(sk);
|
|
}
|
|
|
|
err = -EINVAL;
|
|
if (!sctp_sstate(sk, LISTENING))
|
|
break;
|
|
|
|
err = 0;
|
|
if (!list_empty(&ep->asocs))
|
|
break;
|
|
|
|
err = sock_intr_errno(timeo);
|
|
if (signal_pending(current))
|
|
break;
|
|
|
|
err = -EAGAIN;
|
|
if (!timeo)
|
|
break;
|
|
}
|
|
|
|
finish_wait(sk_sleep(sk), &wait);
|
|
|
|
return err;
|
|
}
|
|
|
|
static void sctp_wait_for_close(struct sock *sk, long timeout)
|
|
{
|
|
DEFINE_WAIT(wait);
|
|
|
|
do {
|
|
prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
|
|
if (list_empty(&sctp_sk(sk)->ep->asocs))
|
|
break;
|
|
release_sock(sk);
|
|
timeout = schedule_timeout(timeout);
|
|
lock_sock(sk);
|
|
} while (!signal_pending(current) && timeout);
|
|
|
|
finish_wait(sk_sleep(sk), &wait);
|
|
}
|
|
|
|
static void sctp_skb_set_owner_r_frag(struct sk_buff *skb, struct sock *sk)
|
|
{
|
|
struct sk_buff *frag;
|
|
|
|
if (!skb->data_len)
|
|
goto done;
|
|
|
|
/* Don't forget the fragments. */
|
|
skb_walk_frags(skb, frag)
|
|
sctp_skb_set_owner_r_frag(frag, sk);
|
|
|
|
done:
|
|
sctp_skb_set_owner_r(skb, sk);
|
|
}
|
|
|
|
void sctp_copy_sock(struct sock *newsk, struct sock *sk,
|
|
struct sctp_association *asoc)
|
|
{
|
|
struct inet_sock *inet = inet_sk(sk);
|
|
struct inet_sock *newinet;
|
|
struct sctp_sock *sp = sctp_sk(sk);
|
|
struct sctp_endpoint *ep = sp->ep;
|
|
|
|
newsk->sk_type = sk->sk_type;
|
|
newsk->sk_bound_dev_if = sk->sk_bound_dev_if;
|
|
newsk->sk_flags = sk->sk_flags;
|
|
newsk->sk_tsflags = sk->sk_tsflags;
|
|
newsk->sk_no_check_tx = sk->sk_no_check_tx;
|
|
newsk->sk_no_check_rx = sk->sk_no_check_rx;
|
|
newsk->sk_reuse = sk->sk_reuse;
|
|
sctp_sk(newsk)->reuse = sp->reuse;
|
|
|
|
newsk->sk_shutdown = sk->sk_shutdown;
|
|
newsk->sk_destruct = sctp_destruct_sock;
|
|
newsk->sk_family = sk->sk_family;
|
|
newsk->sk_protocol = IPPROTO_SCTP;
|
|
newsk->sk_backlog_rcv = sk->sk_prot->backlog_rcv;
|
|
newsk->sk_sndbuf = sk->sk_sndbuf;
|
|
newsk->sk_rcvbuf = sk->sk_rcvbuf;
|
|
newsk->sk_lingertime = sk->sk_lingertime;
|
|
newsk->sk_rcvtimeo = sk->sk_rcvtimeo;
|
|
newsk->sk_sndtimeo = sk->sk_sndtimeo;
|
|
newsk->sk_rxhash = sk->sk_rxhash;
|
|
|
|
newinet = inet_sk(newsk);
|
|
|
|
/* Initialize sk's sport, dport, rcv_saddr and daddr for
|
|
* getsockname() and getpeername()
|
|
*/
|
|
newinet->inet_sport = inet->inet_sport;
|
|
newinet->inet_saddr = inet->inet_saddr;
|
|
newinet->inet_rcv_saddr = inet->inet_rcv_saddr;
|
|
newinet->inet_dport = htons(asoc->peer.port);
|
|
newinet->pmtudisc = inet->pmtudisc;
|
|
newinet->inet_id = prandom_u32();
|
|
|
|
newinet->uc_ttl = inet->uc_ttl;
|
|
newinet->mc_loop = 1;
|
|
newinet->mc_ttl = 1;
|
|
newinet->mc_index = 0;
|
|
newinet->mc_list = NULL;
|
|
|
|
if (newsk->sk_flags & SK_FLAGS_TIMESTAMP)
|
|
net_enable_timestamp();
|
|
|
|
/* Set newsk security attributes from original sk and connection
|
|
* security attribute from ep.
|
|
*/
|
|
security_sctp_sk_clone(ep, sk, newsk);
|
|
}
|
|
|
|
static inline void sctp_copy_descendant(struct sock *sk_to,
|
|
const struct sock *sk_from)
|
|
{
|
|
size_t ancestor_size = sizeof(struct inet_sock);
|
|
|
|
ancestor_size += sk_from->sk_prot->obj_size;
|
|
ancestor_size -= offsetof(struct sctp_sock, pd_lobby);
|
|
__inet_sk_copy_descendant(sk_to, sk_from, ancestor_size);
|
|
}
|
|
|
|
/* Populate the fields of the newsk from the oldsk and migrate the assoc
|
|
* and its messages to the newsk.
|
|
*/
|
|
static int sctp_sock_migrate(struct sock *oldsk, struct sock *newsk,
|
|
struct sctp_association *assoc,
|
|
enum sctp_socket_type type)
|
|
{
|
|
struct sctp_sock *oldsp = sctp_sk(oldsk);
|
|
struct sctp_sock *newsp = sctp_sk(newsk);
|
|
struct sctp_bind_bucket *pp; /* hash list port iterator */
|
|
struct sctp_endpoint *newep = newsp->ep;
|
|
struct sk_buff *skb, *tmp;
|
|
struct sctp_ulpevent *event;
|
|
struct sctp_bind_hashbucket *head;
|
|
int err;
|
|
|
|
/* Migrate socket buffer sizes and all the socket level options to the
|
|
* new socket.
|
|
*/
|
|
newsk->sk_sndbuf = oldsk->sk_sndbuf;
|
|
newsk->sk_rcvbuf = oldsk->sk_rcvbuf;
|
|
/* Brute force copy old sctp opt. */
|
|
sctp_copy_descendant(newsk, oldsk);
|
|
|
|
/* Restore the ep value that was overwritten with the above structure
|
|
* copy.
|
|
*/
|
|
newsp->ep = newep;
|
|
newsp->hmac = NULL;
|
|
|
|
/* Hook this new socket in to the bind_hash list. */
|
|
head = &sctp_port_hashtable[sctp_phashfn(sock_net(oldsk),
|
|
inet_sk(oldsk)->inet_num)];
|
|
spin_lock_bh(&head->lock);
|
|
pp = sctp_sk(oldsk)->bind_hash;
|
|
sk_add_bind_node(newsk, &pp->owner);
|
|
sctp_sk(newsk)->bind_hash = pp;
|
|
inet_sk(newsk)->inet_num = inet_sk(oldsk)->inet_num;
|
|
spin_unlock_bh(&head->lock);
|
|
|
|
/* Copy the bind_addr list from the original endpoint to the new
|
|
* endpoint so that we can handle restarts properly
|
|
*/
|
|
err = sctp_bind_addr_dup(&newsp->ep->base.bind_addr,
|
|
&oldsp->ep->base.bind_addr, GFP_KERNEL);
|
|
if (err)
|
|
return err;
|
|
|
|
/* New ep's auth_hmacs should be set if old ep's is set, in case
|
|
* that net->sctp.auth_enable has been changed to 0 by users and
|
|
* new ep's auth_hmacs couldn't be set in sctp_endpoint_init().
|
|
*/
|
|
if (oldsp->ep->auth_hmacs) {
|
|
err = sctp_auth_init_hmacs(newsp->ep, GFP_KERNEL);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
sctp_auto_asconf_init(newsp);
|
|
|
|
/* Move any messages in the old socket's receive queue that are for the
|
|
* peeled off association to the new socket's receive queue.
|
|
*/
|
|
sctp_skb_for_each(skb, &oldsk->sk_receive_queue, tmp) {
|
|
event = sctp_skb2event(skb);
|
|
if (event->asoc == assoc) {
|
|
__skb_unlink(skb, &oldsk->sk_receive_queue);
|
|
__skb_queue_tail(&newsk->sk_receive_queue, skb);
|
|
sctp_skb_set_owner_r_frag(skb, newsk);
|
|
}
|
|
}
|
|
|
|
/* Clean up any messages pending delivery due to partial
|
|
* delivery. Three cases:
|
|
* 1) No partial deliver; no work.
|
|
* 2) Peeling off partial delivery; keep pd_lobby in new pd_lobby.
|
|
* 3) Peeling off non-partial delivery; move pd_lobby to receive_queue.
|
|
*/
|
|
atomic_set(&sctp_sk(newsk)->pd_mode, assoc->ulpq.pd_mode);
|
|
|
|
if (atomic_read(&sctp_sk(oldsk)->pd_mode)) {
|
|
struct sk_buff_head *queue;
|
|
|
|
/* Decide which queue to move pd_lobby skbs to. */
|
|
if (assoc->ulpq.pd_mode) {
|
|
queue = &newsp->pd_lobby;
|
|
} else
|
|
queue = &newsk->sk_receive_queue;
|
|
|
|
/* Walk through the pd_lobby, looking for skbs that
|
|
* need moved to the new socket.
|
|
*/
|
|
sctp_skb_for_each(skb, &oldsp->pd_lobby, tmp) {
|
|
event = sctp_skb2event(skb);
|
|
if (event->asoc == assoc) {
|
|
__skb_unlink(skb, &oldsp->pd_lobby);
|
|
__skb_queue_tail(queue, skb);
|
|
sctp_skb_set_owner_r_frag(skb, newsk);
|
|
}
|
|
}
|
|
|
|
/* Clear up any skbs waiting for the partial
|
|
* delivery to finish.
|
|
*/
|
|
if (assoc->ulpq.pd_mode)
|
|
sctp_clear_pd(oldsk, NULL);
|
|
|
|
}
|
|
|
|
sctp_for_each_rx_skb(assoc, newsk, sctp_skb_set_owner_r_frag);
|
|
|
|
/* Set the type of socket to indicate that it is peeled off from the
|
|
* original UDP-style socket or created with the accept() call on a
|
|
* TCP-style socket..
|
|
*/
|
|
newsp->type = type;
|
|
|
|
/* Mark the new socket "in-use" by the user so that any packets
|
|
* that may arrive on the association after we've moved it are
|
|
* queued to the backlog. This prevents a potential race between
|
|
* backlog processing on the old socket and new-packet processing
|
|
* on the new socket.
|
|
*
|
|
* The caller has just allocated newsk so we can guarantee that other
|
|
* paths won't try to lock it and then oldsk.
|
|
*/
|
|
lock_sock_nested(newsk, SINGLE_DEPTH_NESTING);
|
|
sctp_for_each_tx_datachunk(assoc, true, sctp_clear_owner_w);
|
|
sctp_assoc_migrate(assoc, newsk);
|
|
sctp_for_each_tx_datachunk(assoc, false, sctp_set_owner_w);
|
|
|
|
/* If the association on the newsk is already closed before accept()
|
|
* is called, set RCV_SHUTDOWN flag.
|
|
*/
|
|
if (sctp_state(assoc, CLOSED) && sctp_style(newsk, TCP)) {
|
|
inet_sk_set_state(newsk, SCTP_SS_CLOSED);
|
|
newsk->sk_shutdown |= RCV_SHUTDOWN;
|
|
} else {
|
|
inet_sk_set_state(newsk, SCTP_SS_ESTABLISHED);
|
|
}
|
|
|
|
release_sock(newsk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* This proto struct describes the ULP interface for SCTP. */
|
|
struct proto sctp_prot = {
|
|
.name = "SCTP",
|
|
.owner = THIS_MODULE,
|
|
.close = sctp_close,
|
|
.disconnect = sctp_disconnect,
|
|
.accept = sctp_accept,
|
|
.ioctl = sctp_ioctl,
|
|
.init = sctp_init_sock,
|
|
.destroy = sctp_destroy_sock,
|
|
.shutdown = sctp_shutdown,
|
|
.setsockopt = sctp_setsockopt,
|
|
.getsockopt = sctp_getsockopt,
|
|
.sendmsg = sctp_sendmsg,
|
|
.recvmsg = sctp_recvmsg,
|
|
.bind = sctp_bind,
|
|
.bind_add = sctp_bind_add,
|
|
.backlog_rcv = sctp_backlog_rcv,
|
|
.hash = sctp_hash,
|
|
.unhash = sctp_unhash,
|
|
.no_autobind = true,
|
|
.obj_size = sizeof(struct sctp_sock),
|
|
.useroffset = offsetof(struct sctp_sock, subscribe),
|
|
.usersize = offsetof(struct sctp_sock, initmsg) -
|
|
offsetof(struct sctp_sock, subscribe) +
|
|
sizeof_field(struct sctp_sock, initmsg),
|
|
.sysctl_mem = sysctl_sctp_mem,
|
|
.sysctl_rmem = sysctl_sctp_rmem,
|
|
.sysctl_wmem = sysctl_sctp_wmem,
|
|
.memory_pressure = &sctp_memory_pressure,
|
|
.enter_memory_pressure = sctp_enter_memory_pressure,
|
|
.memory_allocated = &sctp_memory_allocated,
|
|
.sockets_allocated = &sctp_sockets_allocated,
|
|
};
|
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
|
|
#include <net/transp_v6.h>
|
|
static void sctp_v6_destroy_sock(struct sock *sk)
|
|
{
|
|
sctp_destroy_sock(sk);
|
|
inet6_destroy_sock(sk);
|
|
}
|
|
|
|
struct proto sctpv6_prot = {
|
|
.name = "SCTPv6",
|
|
.owner = THIS_MODULE,
|
|
.close = sctp_close,
|
|
.disconnect = sctp_disconnect,
|
|
.accept = sctp_accept,
|
|
.ioctl = sctp_ioctl,
|
|
.init = sctp_init_sock,
|
|
.destroy = sctp_v6_destroy_sock,
|
|
.shutdown = sctp_shutdown,
|
|
.setsockopt = sctp_setsockopt,
|
|
.getsockopt = sctp_getsockopt,
|
|
.sendmsg = sctp_sendmsg,
|
|
.recvmsg = sctp_recvmsg,
|
|
.bind = sctp_bind,
|
|
.bind_add = sctp_bind_add,
|
|
.backlog_rcv = sctp_backlog_rcv,
|
|
.hash = sctp_hash,
|
|
.unhash = sctp_unhash,
|
|
.no_autobind = true,
|
|
.obj_size = sizeof(struct sctp6_sock),
|
|
.useroffset = offsetof(struct sctp6_sock, sctp.subscribe),
|
|
.usersize = offsetof(struct sctp6_sock, sctp.initmsg) -
|
|
offsetof(struct sctp6_sock, sctp.subscribe) +
|
|
sizeof_field(struct sctp6_sock, sctp.initmsg),
|
|
.sysctl_mem = sysctl_sctp_mem,
|
|
.sysctl_rmem = sysctl_sctp_rmem,
|
|
.sysctl_wmem = sysctl_sctp_wmem,
|
|
.memory_pressure = &sctp_memory_pressure,
|
|
.enter_memory_pressure = sctp_enter_memory_pressure,
|
|
.memory_allocated = &sctp_memory_allocated,
|
|
.sockets_allocated = &sctp_sockets_allocated,
|
|
};
|
|
#endif /* IS_ENABLED(CONFIG_IPV6) */
|