[NET]: Introducing socket mark socket option.
A userspace program may wish to set the mark for each packets its send without using the netfilter MARK target. Changing the mark can be used for mark based routing without netfilter or for packet filtering. It requires CAP_NET_ADMIN capability. Signed-off-by: Laszlo Attila Toth <panther@balabit.hu> Acked-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
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036c2e27bc
Коммит
4a19ec5800
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@ -60,4 +60,6 @@
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#define SO_SECURITY_ENCRYPTION_TRANSPORT 20
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#define SO_SECURITY_ENCRYPTION_NETWORK 21
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#define SO_MARK 36
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#endif /* _ASM_SOCKET_H */
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@ -52,4 +52,6 @@
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#define SO_TIMESTAMPNS 35
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#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
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#define SO_MARK 36
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#endif /* _ASM_SOCKET_H */
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@ -52,4 +52,6 @@
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#define SO_TIMESTAMPNS 35
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#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
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#define SO_MARK 36
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#endif /* __ASM_AVR32_SOCKET_H */
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@ -50,4 +50,7 @@
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#define SO_PASSSEC 34
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#define SO_TIMESTAMPNS 35
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#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
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#define SO_MARK 36
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#endif /* _ASM_SOCKET_H */
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@ -54,6 +54,8 @@
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#define SO_TIMESTAMPNS 35
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#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
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#define SO_MARK 36
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#endif /* _ASM_SOCKET_H */
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@ -52,5 +52,7 @@
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#define SO_TIMESTAMPNS 35
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#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
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#define SO_MARK 36
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#endif /* _ASM_SOCKET_H */
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@ -52,4 +52,6 @@
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#define SO_TIMESTAMPNS 35
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#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
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#define SO_MARK 36
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#endif /* _ASM_SOCKET_H */
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@ -61,4 +61,6 @@
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#define SO_TIMESTAMPNS 35
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#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
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#define SO_MARK 36
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#endif /* _ASM_IA64_SOCKET_H */
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@ -52,4 +52,6 @@
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#define SO_TIMESTAMPNS 35
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#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
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#define SO_MARK 36
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#endif /* _ASM_M32R_SOCKET_H */
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@ -52,4 +52,6 @@
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#define SO_TIMESTAMPNS 35
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#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
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#define SO_MARK 36
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#endif /* _ASM_SOCKET_H */
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@ -73,6 +73,8 @@ To add: #define SO_REUSEPORT 0x0200 /* Allow local address and port reuse. */
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#define SO_TIMESTAMPNS 35
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#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
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#define SO_MARK 36
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#ifdef __KERNEL__
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/** sock_type - Socket types
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@ -52,4 +52,6 @@
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#define SO_PEERSEC 0x401d
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#define SO_PASSSEC 0x401e
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#define SO_MARK 0x401f
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#endif /* _ASM_SOCKET_H */
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@ -59,4 +59,6 @@
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#define SO_TIMESTAMPNS 35
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#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
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#define SO_MARK 36
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#endif /* _ASM_POWERPC_SOCKET_H */
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@ -60,4 +60,6 @@
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#define SO_TIMESTAMPNS 35
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#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
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#define SO_MARK 36
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#endif /* _ASM_SOCKET_H */
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@ -52,4 +52,6 @@
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#define SO_TIMESTAMPNS 35
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#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
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#define SO_MARK 36
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#endif /* __ASM_SH_SOCKET_H */
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@ -52,6 +52,8 @@
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#define SO_TIMESTAMPNS 0x0021
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#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
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#define SO_MARK 0x0022
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/* Security levels - as per NRL IPv6 - don't actually do anything */
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#define SO_SECURITY_AUTHENTICATION 0x5001
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#define SO_SECURITY_ENCRYPTION_TRANSPORT 0x5002
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@ -57,4 +57,5 @@
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#define SO_SECURITY_ENCRYPTION_TRANSPORT 0x5002
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#define SO_SECURITY_ENCRYPTION_NETWORK 0x5004
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#define SO_MARK 0x0022
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#endif /* _ASM_SOCKET_H */
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@ -52,4 +52,6 @@
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#define SO_TIMESTAMPNS 35
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#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
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#define SO_MARK 36
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#endif /* __V850_SOCKET_H__ */
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@ -52,4 +52,6 @@
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#define SO_TIMESTAMPNS 35
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#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
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#define SO_MARK 36
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#endif /* _ASM_SOCKET_H */
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@ -63,4 +63,6 @@
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#define SO_TIMESTAMPNS 35
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#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
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#define SO_MARK 36
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#endif /* _XTENSA_SOCKET_H */
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@ -27,6 +27,7 @@
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#include <net/dst.h>
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#include <net/inetpeer.h>
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#include <net/flow.h>
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#include <net/sock.h>
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#include <linux/in_route.h>
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#include <linux/rtnetlink.h>
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#include <linux/route.h>
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@ -149,6 +150,7 @@ static inline int ip_route_connect(struct rtable **rp, __be32 dst,
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int flags)
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{
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struct flowi fl = { .oif = oif,
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.mark = sk->sk_mark,
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.nl_u = { .ip4_u = { .daddr = dst,
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.saddr = src,
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.tos = tos } },
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@ -262,6 +262,8 @@ struct sock {
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__u32 sk_sndmsg_off;
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int sk_write_pending;
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void *sk_security;
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__u32 sk_mark;
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/* XXX 4 bytes hole on 64 bit */
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void (*sk_state_change)(struct sock *sk);
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void (*sk_data_ready)(struct sock *sk, int bytes);
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void (*sk_write_space)(struct sock *sk);
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@ -667,6 +667,13 @@ set_rcvbuf:
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else
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clear_bit(SOCK_PASSSEC, &sock->flags);
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break;
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case SO_MARK:
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if (!capable(CAP_NET_ADMIN))
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ret = -EPERM;
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else {
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sk->sk_mark = val;
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}
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break;
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/* We implement the SO_SNDLOWAT etc to
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not be settable (1003.1g 5.3) */
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case SO_PEERSEC:
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return security_socket_getpeersec_stream(sock, optval, optlen, len);
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case SO_MARK:
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v.val = sk->sk_mark;
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break;
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default:
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return -ENOPROTOOPT;
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}
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@ -168,6 +168,7 @@ int ip_build_and_send_pkt(struct sk_buff *skb, struct sock *sk,
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}
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skb->priority = sk->sk_priority;
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skb->mark = sk->sk_mark;
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/* Send it out. */
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return ip_local_out(skb);
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(skb_shinfo(skb)->gso_segs ?: 1) - 1);
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skb->priority = sk->sk_priority;
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skb->mark = sk->sk_mark;
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return ip_local_out(skb);
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iph->daddr = rt->rt_dst;
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skb->priority = sk->sk_priority;
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skb->mark = sk->sk_mark;
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skb->dst = dst_clone(&rt->u.dst);
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if (iph->protocol == IPPROTO_ICMP)
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skb_reserve(skb, hh_len);
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skb->priority = sk->sk_priority;
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skb->mark = sk->sk_mark;
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skb->dst = dst_clone(&rt->u.dst);
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skb_reset_network_header(skb);
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{
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struct flowi fl = { .oif = ipc.oif,
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.mark = sk->sk_mark,
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.nl_u = { .ip4_u =
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{ .daddr = daddr,
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.saddr = saddr,
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ipv6_addr_copy(&hdr->daddr, first_hop);
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skb->priority = sk->sk_priority;
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skb->mark = sk->sk_mark;
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mtu = dst_mtu(dst);
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if ((skb->len <= mtu) || ipfragok || skb_is_gso(skb)) {
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ipv6_addr_copy(&hdr->daddr, final_dst);
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skb->priority = sk->sk_priority;
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skb->mark = sk->sk_mark;
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skb->dst = dst_clone(&rt->u.dst);
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IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTREQUESTS);
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skb_reserve(skb, hh_len);
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skb->priority = sk->sk_priority;
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skb->mark = sk->sk_mark;
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skb->dst = dst_clone(&rt->u.dst);
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skb_put(skb, length);
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*/
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memset(&fl, 0, sizeof(fl));
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fl.mark = sk->sk_mark;
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if (sin6) {
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if (addr_len < SIN6_LEN_RFC2133)
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return -EINVAL;
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