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ipv4: route non-local sources for raw socket

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The raw sockets can provide source address for
routing but their privileges are not considered. We
can provide non-local source address, make sure the
FLOWI_FLAG_ANYSRC flag is set if socket has privileges
for this, i.e. based on hdrincl (IP_HDRINCL) and
transparent flags.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Julian Anastasov 2011-08-07 09:16:09 +00:00 committed by David S. Miller
parent 797fd3913a
commit 47670b767b
2 changed files with 3 additions and 2 deletions
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2
include/net/inet_sock.h
View File

@ -238,7 +238,7 @@ static inline __u8 inet_sk_flowi_flags(const struct sock *sk)
{ {
__u8 flags = 0; __u8 flags = 0;
if (inet_sk(sk)->transparent) if (inet_sk(sk)->transparent || inet_sk(sk)->hdrincl)
flags |= FLOWI_FLAG_ANYSRC; flags |= FLOWI_FLAG_ANYSRC;
if (sk->sk_protocol == IPPROTO_TCP) if (sk->sk_protocol == IPPROTO_TCP)
flags |= FLOWI_FLAG_PRECOW_METRICS; flags |= FLOWI_FLAG_PRECOW_METRICS;

3
net/ipv4/raw.c
View File

@ -563,7 +563,8 @@ static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
flowi4_init_output(&fl4, ipc.oif, sk->sk_mark, tos, flowi4_init_output(&fl4, ipc.oif, sk->sk_mark, tos,
RT_SCOPE_UNIVERSE, RT_SCOPE_UNIVERSE,
inet->hdrincl ? IPPROTO_RAW : sk->sk_protocol, inet->hdrincl ? IPPROTO_RAW : sk->sk_protocol,
FLOWI_FLAG_CAN_SLEEP, daddr, saddr, 0, 0); inet_sk_flowi_flags(sk) | FLOWI_FLAG_CAN_SLEEP,
daddr, saddr, 0, 0);
if (!inet->hdrincl) { if (!inet->hdrincl) {
err = raw_probe_proto_opt(&fl4, msg); err = raw_probe_proto_opt(&fl4, msg);