From: Martin Topholm Date: Thu, 14 Nov 2013 14:35:30 +0000 (+0100) Subject: netfilter: synproxy: send mss option to backend X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=a6441b7a39f18acb68c83cd738f1310881aa8a0b;p=linux.git netfilter: synproxy: send mss option to backend When the synproxy_parse_options is called on the client ack the mss option will not be present. Consequently mss wont be included in the backend syn packet, which falls back to 536 bytes mss. Therefore XT_SYNPROXY_OPT_MSS is explicitly flagged when recovering mss value from cookie. Signed-off-by: Martin Topholm Reviewed-by: Jesper Dangaard Brouer Signed-off-by: Pablo Neira Ayuso --- diff --git a/net/ipv4/netfilter/ipt_SYNPROXY.c b/net/ipv4/netfilter/ipt_SYNPROXY.c index 01cffeaa0085e..f13bd91d9a567 100644 --- a/net/ipv4/netfilter/ipt_SYNPROXY.c +++ b/net/ipv4/netfilter/ipt_SYNPROXY.c @@ -244,6 +244,7 @@ synproxy_recv_client_ack(const struct synproxy_net *snet, this_cpu_inc(snet->stats->cookie_valid); opts->mss = mss; + opts->options |= XT_SYNPROXY_OPT_MSS; if (opts->options & XT_SYNPROXY_OPT_TIMESTAMP) synproxy_check_timestamp_cookie(opts); diff --git a/net/ipv6/netfilter/ip6t_SYNPROXY.c b/net/ipv6/netfilter/ip6t_SYNPROXY.c index bf9f612c1bc24..f78f41aca8e90 100644 --- a/net/ipv6/netfilter/ip6t_SYNPROXY.c +++ b/net/ipv6/netfilter/ip6t_SYNPROXY.c @@ -259,6 +259,7 @@ synproxy_recv_client_ack(const struct synproxy_net *snet, this_cpu_inc(snet->stats->cookie_valid); opts->mss = mss; + opts->options |= XT_SYNPROXY_OPT_MSS; if (opts->options & XT_SYNPROXY_OPT_TIMESTAMP) synproxy_check_timestamp_cookie(opts);