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From: Simon Horman <horms@verge.net.au>
To: Pablo Neira Ayuso <pablo@netfilter.org>
Cc: lvs-devel@vger.kernel.org, netdev@vger.kernel.org,
	netfilter-devel@vger.kernel.org,
	Wensong Zhang <wensong@linux-vs.org>,
	Julian Anastasov <ja@ssi.bg>, Simon Horman <horms@verge.net.au>
Subject: [PATCH 3/4] ipvs: allow rescheduling after RST
Date: Mon,  7 Mar 2016 12:03:33 +0900	[thread overview]
Message-ID: <1457319814-8027-4-git-send-email-horms@verge.net.au> (raw)
In-Reply-To: <1457319814-8027-1-git-send-email-horms@verge.net.au>

From: Julian Anastasov <ja@ssi.bg>

"RFC 5961, 4.2. Mitigation" describes a mechanism to request
client to confirm with RST the restart of TCP connection
before resending its SYN. As result, IPVS can see SYNs for
existing connection in CLOSE state. Add check to allow
rescheduling in this state.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
---
 net/netfilter/ipvs/ip_vs_core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/netfilter/ipvs/ip_vs_core.c b/net/netfilter/ipvs/ip_vs_core.c
index 4da560005b0e..b9a4082afa3a 100644
--- a/net/netfilter/ipvs/ip_vs_core.c
+++ b/net/netfilter/ipvs/ip_vs_core.c
@@ -1089,6 +1089,7 @@ static inline bool is_new_conn_expected(const struct ip_vs_conn *cp,
 	switch (cp->protocol) {
 	case IPPROTO_TCP:
 		return (cp->state == IP_VS_TCP_S_TIME_WAIT) ||
+		       (cp->state == IP_VS_TCP_S_CLOSE) ||
 			((conn_reuse_mode & 2) &&
 			 (cp->state == IP_VS_TCP_S_FIN_WAIT) &&
 			 (cp->flags & IP_VS_CONN_F_NOOUTPUT));
-- 
2.1.4


  parent reply	other threads:[~2016-03-07  3:03 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-03-07  3:03 [GIT PULL v2 0/4] IPVS Fixes for v4.5 Simon Horman
2016-03-07  3:03 ` [PATCH 1/4] ipvs: handle ip_vs_fill_iph_skb_off failure Simon Horman
2016-03-07  3:03 ` [PATCH 2/4] ipvs: drop first packet to redirect conntrack Simon Horman
2016-03-07  3:03 ` Simon Horman [this message]
2016-03-07  3:03 ` [PATCH 4/4] ipvs: correct initial offset of Call-ID header search in SIP persistence engine Simon Horman
2016-03-10 16:39 ` [GIT PULL v2 0/4] IPVS Fixes for v4.5 Pablo Neira Ayuso

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