111 строки
3.2 KiB
C
111 строки
3.2 KiB
C
/*
|
|
* INET An implementation of the TCP/IP protocol suite for the LINUX
|
|
* operating system. INET is implemented using the BSD Socket
|
|
* interface as the means of communication with the user level.
|
|
*
|
|
* Authors: Lotsa people, from code originally in tcp
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
|
|
#ifndef _INET6_HASHTABLES_H
|
|
#define _INET6_HASHTABLES_H
|
|
|
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
#include <linux/in6.h>
|
|
#include <linux/ipv6.h>
|
|
#include <linux/types.h>
|
|
#include <linux/jhash.h>
|
|
|
|
#include <net/inet_sock.h>
|
|
|
|
#include <net/ipv6.h>
|
|
#include <net/netns/hash.h>
|
|
|
|
struct inet_hashinfo;
|
|
|
|
static inline unsigned int __inet6_ehashfn(const u32 lhash,
|
|
const u16 lport,
|
|
const u32 fhash,
|
|
const __be16 fport,
|
|
const u32 initval)
|
|
{
|
|
const u32 ports = (((u32)lport) << 16) | (__force u32)fport;
|
|
return jhash_3words(lhash, fhash, ports, initval);
|
|
}
|
|
|
|
/*
|
|
* Sockets in TCP_CLOSE state are _always_ taken out of the hash, so
|
|
* we need not check it for TCP lookups anymore, thanks Alexey. -DaveM
|
|
*
|
|
* The sockhash lock must be held as a reader here.
|
|
*/
|
|
struct sock *__inet6_lookup_established(struct net *net,
|
|
struct inet_hashinfo *hashinfo,
|
|
const struct in6_addr *saddr,
|
|
const __be16 sport,
|
|
const struct in6_addr *daddr,
|
|
const u16 hnum, const int dif);
|
|
|
|
struct sock *inet6_lookup_listener(struct net *net,
|
|
struct inet_hashinfo *hashinfo,
|
|
const struct in6_addr *saddr,
|
|
const __be16 sport,
|
|
const struct in6_addr *daddr,
|
|
const unsigned short hnum, const int dif);
|
|
|
|
static inline struct sock *__inet6_lookup(struct net *net,
|
|
struct inet_hashinfo *hashinfo,
|
|
const struct in6_addr *saddr,
|
|
const __be16 sport,
|
|
const struct in6_addr *daddr,
|
|
const u16 hnum,
|
|
const int dif)
|
|
{
|
|
struct sock *sk = __inet6_lookup_established(net, hashinfo, saddr,
|
|
sport, daddr, hnum, dif);
|
|
if (sk)
|
|
return sk;
|
|
|
|
return inet6_lookup_listener(net, hashinfo, saddr, sport,
|
|
daddr, hnum, dif);
|
|
}
|
|
|
|
static inline struct sock *__inet6_lookup_skb(struct inet_hashinfo *hashinfo,
|
|
struct sk_buff *skb,
|
|
const __be16 sport,
|
|
const __be16 dport,
|
|
int iif)
|
|
{
|
|
struct sock *sk = skb_steal_sock(skb);
|
|
|
|
if (sk)
|
|
return sk;
|
|
|
|
return __inet6_lookup(dev_net(skb_dst(skb)->dev), hashinfo,
|
|
&ipv6_hdr(skb)->saddr, sport,
|
|
&ipv6_hdr(skb)->daddr, ntohs(dport),
|
|
iif);
|
|
}
|
|
|
|
struct sock *inet6_lookup(struct net *net, struct inet_hashinfo *hashinfo,
|
|
const struct in6_addr *saddr, const __be16 sport,
|
|
const struct in6_addr *daddr, const __be16 dport,
|
|
const int dif);
|
|
#endif /* IS_ENABLED(CONFIG_IPV6) */
|
|
|
|
#define INET6_MATCH(__sk, __net, __saddr, __daddr, __ports, __dif) \
|
|
(((__sk)->sk_portpair == (__ports)) && \
|
|
((__sk)->sk_family == AF_INET6) && \
|
|
ipv6_addr_equal(&(__sk)->sk_v6_daddr, (__saddr)) && \
|
|
ipv6_addr_equal(&(__sk)->sk_v6_rcv_saddr, (__daddr)) && \
|
|
(!(__sk)->sk_bound_dev_if || \
|
|
((__sk)->sk_bound_dev_if == (__dif))) && \
|
|
net_eq(sock_net(__sk), (__net)))
|
|
|
|
#endif /* _INET6_HASHTABLES_H */
|