Commit f911b675 authored Mar 05, 2016 by Julian Anastasov Committed by Simon Horman Mar 07, 2016

ipvs: allow rescheduling after RST



"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>

parent f719e375

net/netfilter/ipvs/ip_vs_core.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -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));