From 88ef4a5a78e63420dd1dd770f1bd1dc198926b04 Mon Sep 17 00:00:00 2001 From: KOVACS Krisztian Date: Wed, 1 Oct 2008 07:41:00 -0700 Subject: tcp: Handle TCP SYN+ACK/ACK/RST transparency The TCP stack sends out SYN+ACK/ACK/RST reply packets in response to incoming packets. The non-local source address check on output bites us again, as replies for transparently redirected traffic won't have a chance to leave the node. This patch selectively sets the FLOWI_FLAG_ANYSRC flag when doing the route lookup for those replies. Transparent replies are enabled if the listening socket has the transparent socket flag set. Signed-off-by: KOVACS Krisztian Signed-off-by: David S. Miller --- include/net/inet_sock.h | 8 +++++++- include/net/ip.h | 3 +++ 2 files changed, 10 insertions(+), 1 deletion(-) (limited to 'include') diff --git a/include/net/inet_sock.h b/include/net/inet_sock.h index 139b78b4dfe..dced3f64f97 100644 --- a/include/net/inet_sock.h +++ b/include/net/inet_sock.h @@ -72,7 +72,8 @@ struct inet_request_sock { sack_ok : 1, wscale_ok : 1, ecn_ok : 1, - acked : 1; + acked : 1, + no_srccheck: 1; struct ip_options *opt; }; @@ -204,4 +205,9 @@ static inline struct request_sock *inet_reqsk_alloc(struct request_sock_ops *ops return req; } +static inline __u8 inet_sk_flowi_flags(const struct sock *sk) +{ + return inet_sk(sk)->transparent ? FLOWI_FLAG_ANYSRC : 0; +} + #endif /* _INET_SOCK_H */ diff --git a/include/net/ip.h b/include/net/ip.h index 250e6ef025a..90b27f634b7 100644 --- a/include/net/ip.h +++ b/include/net/ip.h @@ -140,12 +140,15 @@ static inline void ip_tr_mc_map(__be32 addr, char *buf) struct ip_reply_arg { struct kvec iov[1]; + int flags; __wsum csum; int csumoffset; /* u16 offset of csum in iov[0].iov_base */ /* -1 if not needed */ int bound_dev_if; }; +#define IP_REPLY_ARG_NOSRCCHECK 1 + void ip_send_reply(struct sock *sk, struct sk_buff *skb, struct ip_reply_arg *arg, unsigned int len); -- cgit v1.2.3