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[NET]: Introducing socket mark socket option.

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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>
This commit is contained in:
Laszlo Attila Toth 2008-01-30 19:08:16 -08:00 committed by David S. Miller
parent 036c2e27bc
commit 4a19ec5800
27 changed files with 65 additions and 0 deletions
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2
include/asm-alpha/socket.h
View File

@ -60,4 +60,6 @@
#define SO_SECURITY_ENCRYPTION_TRANSPORT 20
#define SO_SECURITY_ENCRYPTION_NETWORK 21
#define SO_MARK 36
#endif /* _ASM_SOCKET_H */

2
include/asm-arm/socket.h
View File

@ -52,4 +52,6 @@
#define SO_TIMESTAMPNS 35
#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
#define SO_MARK 36
#endif /* _ASM_SOCKET_H */

2
include/asm-avr32/socket.h
View File

@ -52,4 +52,6 @@
#define SO_TIMESTAMPNS 35
#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
#define SO_MARK 36
#endif /* __ASM_AVR32_SOCKET_H */

3
include/asm-blackfin/socket.h
View File

@ -50,4 +50,7 @@
#define SO_PASSSEC 34
#define SO_TIMESTAMPNS 35
#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
#define SO_MARK 36
#endif /* _ASM_SOCKET_H */

2
include/asm-cris/socket.h
View File

@ -54,6 +54,8 @@
#define SO_TIMESTAMPNS 35
#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
#define SO_MARK 36
#endif /* _ASM_SOCKET_H */

2
include/asm-frv/socket.h
View File

@ -52,5 +52,7 @@
#define SO_TIMESTAMPNS 35
#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
#define SO_MARK 36
#endif /* _ASM_SOCKET_H */

2
include/asm-h8300/socket.h
View File

@ -52,4 +52,6 @@
#define SO_TIMESTAMPNS 35
#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
#define SO_MARK 36
#endif /* _ASM_SOCKET_H */

2
include/asm-ia64/socket.h
View File

@ -61,4 +61,6 @@
#define SO_TIMESTAMPNS 35
#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
#define SO_MARK 36
#endif /* _ASM_IA64_SOCKET_H */

2
include/asm-m32r/socket.h
View File

@ -52,4 +52,6 @@
#define SO_TIMESTAMPNS 35
#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
#define SO_MARK 36
#endif /* _ASM_M32R_SOCKET_H */

2
include/asm-m68k/socket.h
View File

@ -52,4 +52,6 @@
#define SO_TIMESTAMPNS 35
#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
#define SO_MARK 36
#endif /* _ASM_SOCKET_H */

2
include/asm-mips/socket.h
View File

@ -73,6 +73,8 @@ To add: #define SO_REUSEPORT 0x0200 /* Allow local address and port reuse. */
#define SO_TIMESTAMPNS 35
#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
#define SO_MARK 36
#ifdef __KERNEL__
/** sock_type - Socket types

2
include/asm-parisc/socket.h
View File

@ -52,4 +52,6 @@
#define SO_PEERSEC 0x401d
#define SO_PASSSEC 0x401e
#define SO_MARK 0x401f
#endif /* _ASM_SOCKET_H */

2
include/asm-powerpc/socket.h
View File

@ -59,4 +59,6 @@
#define SO_TIMESTAMPNS 35
#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
#define SO_MARK 36
#endif /* _ASM_POWERPC_SOCKET_H */

2
include/asm-s390/socket.h
View File

@ -60,4 +60,6 @@
#define SO_TIMESTAMPNS 35
#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
#define SO_MARK 36
#endif /* _ASM_SOCKET_H */

2
include/asm-sh/socket.h
View File

@ -52,4 +52,6 @@
#define SO_TIMESTAMPNS 35
#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
#define SO_MARK 36
#endif /* __ASM_SH_SOCKET_H */

2
include/asm-sparc/socket.h
View File

@ -52,6 +52,8 @@
#define SO_TIMESTAMPNS 0x0021
#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
#define SO_MARK 0x0022
/* Security levels - as per NRL IPv6 - don't actually do anything */
#define SO_SECURITY_AUTHENTICATION 0x5001
#define SO_SECURITY_ENCRYPTION_TRANSPORT 0x5002

1
include/asm-sparc64/socket.h
View File

@ -57,4 +57,5 @@
#define SO_SECURITY_ENCRYPTION_TRANSPORT 0x5002
#define SO_SECURITY_ENCRYPTION_NETWORK 0x5004
#define SO_MARK 0x0022
#endif /* _ASM_SOCKET_H */

2
include/asm-v850/socket.h
View File

@ -52,4 +52,6 @@
#define SO_TIMESTAMPNS 35
#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
#define SO_MARK 36
#endif /* __V850_SOCKET_H__ */

2
include/asm-x86/socket.h
View File

@ -52,4 +52,6 @@
#define SO_TIMESTAMPNS 35
#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
#define SO_MARK 36
#endif /* _ASM_SOCKET_H */

2
include/asm-xtensa/socket.h
View File

@ -63,4 +63,6 @@
#define SO_TIMESTAMPNS 35
#define SCM_TIMESTAMPNS SO_TIMESTAMPNS
#define SO_MARK 36
#endif /* _XTENSA_SOCKET_H */

2
include/net/route.h
View File

@ -27,6 +27,7 @@
#include <net/dst.h>
#include <net/inetpeer.h>
#include <net/flow.h>
#include <net/sock.h>
#include <linux/in_route.h>
#include <linux/rtnetlink.h>
#include <linux/route.h>
@ -149,6 +150,7 @@ static inline int ip_route_connect(struct rtable **rp, __be32 dst,
int flags)
{
struct flowi fl = { .oif = oif,
.mark = sk->sk_mark,
.nl_u = { .ip4_u = { .daddr = dst,
.saddr = src,
.tos = tos } },

2
include/net/sock.h
View File

@ -262,6 +262,8 @@ struct sock {
__u32 sk_sndmsg_off;
int sk_write_pending;
void *sk_security;
__u32 sk_mark;
/* XXX 4 bytes hole on 64 bit */
void (*sk_state_change)(struct sock *sk);
void (*sk_data_ready)(struct sock *sk, int bytes);
void (*sk_write_space)(struct sock *sk);

11
net/core/sock.c
View File

@ -667,6 +667,13 @@ set_rcvbuf:
else
clear_bit(SOCK_PASSSEC, &sock->flags);
break;
case SO_MARK:
if (!capable(CAP_NET_ADMIN))
ret = -EPERM;
else {
sk->sk_mark = val;
}
break;
/* We implement the SO_SNDLOWAT etc to
not be settable (1003.1g 5.3) */
@ -836,6 +843,10 @@ int sock_getsockopt(struct socket *sock, int level, int optname,
case SO_PEERSEC:
return security_socket_getpeersec_stream(sock, optval, optlen, len);
case SO_MARK:
v.val = sk->sk_mark;
break;
default:
return -ENOPROTOOPT;
}

3
net/ipv4/ip_output.c
View File

@ -168,6 +168,7 @@ int ip_build_and_send_pkt(struct sk_buff *skb, struct sock *sk,
}
skb->priority = sk->sk_priority;
skb->mark = sk->sk_mark;
/* Send it out. */
return ip_local_out(skb);
@ -385,6 +386,7 @@ packet_routed:
(skb_shinfo(skb)->gso_segs ?: 1) - 1);
skb->priority = sk->sk_priority;
skb->mark = sk->sk_mark;
return ip_local_out(skb);
@ -1286,6 +1288,7 @@ int ip_push_pending_frames(struct sock *sk)
iph->daddr = rt->rt_dst;
skb->priority = sk->sk_priority;
skb->mark = sk->sk_mark;
skb->dst = dst_clone(&rt->u.dst);
if (iph->protocol == IPPROTO_ICMP)

2
net/ipv4/raw.c
View File

@ -352,6 +352,7 @@ static int raw_send_hdrinc(struct sock *sk, void *from, size_t length,
skb_reserve(skb, hh_len);
skb->priority = sk->sk_priority;
skb->mark = sk->sk_mark;
skb->dst = dst_clone(&rt->u.dst);
skb_reset_network_header(skb);
@ -544,6 +545,7 @@ static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
{
struct flowi fl = { .oif = ipc.oif,
.mark = sk->sk_mark,
.nl_u = { .ip4_u =
{ .daddr = daddr,
.saddr = saddr,

2
net/ipv6/ip6_output.c
View File

@ -257,6 +257,7 @@ int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl,
ipv6_addr_copy(&hdr->daddr, first_hop);
skb->priority = sk->sk_priority;
skb->mark = sk->sk_mark;
mtu = dst_mtu(dst);
if ((skb->len <= mtu) || ipfragok || skb_is_gso(skb)) {
@ -1439,6 +1440,7 @@ int ip6_push_pending_frames(struct sock *sk)
ipv6_addr_copy(&hdr->daddr, final_dst);
skb->priority = sk->sk_priority;
skb->mark = sk->sk_mark;
skb->dst = dst_clone(&rt->u.dst);
IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTREQUESTS);

3
net/ipv6/raw.c
View File

@ -641,6 +641,7 @@ static int rawv6_send_hdrinc(struct sock *sk, void *from, int length,
skb_reserve(skb, hh_len);
skb->priority = sk->sk_priority;
skb->mark = sk->sk_mark;
skb->dst = dst_clone(&rt->u.dst);
skb_put(skb, length);
@ -767,6 +768,8 @@ static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
*/
memset(&fl, 0, sizeof(fl));
fl.mark = sk->sk_mark;
if (sin6) {
if (addr_len < SIN6_LEN_RFC2133)
return -EINVAL;