From 901eaf6c8f997f18ebc8fcbb85411c79161ab3b2 Mon Sep 17 00:00:00 2001 From: Simon Horman Date: Mon, 2 Oct 2006 16:11:51 -0700 Subject: [PATCH] [NETFILTER]: Honour source routing for LVS-NAT For policy routing, packets originating from this machine itself may be routed differently to packets passing through. We want this packet to be routed as if it came from this machine itself. So re-compute the routing information using ip_route_me_harder(). This patch is derived from work by Ken Brownfield Cc: Ken Brownfield Signed-off-by: Simon Horman Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller --- net/ipv4/ipvs/ip_vs_core.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/net/ipv4/ipvs/ip_vs_core.c b/net/ipv4/ipvs/ip_vs_core.c index 6dee03935f78..1445bb47fea4 100644 --- a/net/ipv4/ipvs/ip_vs_core.c +++ b/net/ipv4/ipvs/ip_vs_core.c @@ -813,6 +813,16 @@ ip_vs_out(unsigned int hooknum, struct sk_buff **pskb, skb->nh.iph->saddr = cp->vaddr; ip_send_check(skb->nh.iph); + /* For policy routing, packets originating from this + * machine itself may be routed differently to packets + * passing through. We want this packet to be routed as + * if it came from this machine itself. So re-compute + * the routing information. + */ + if (ip_route_me_harder(pskb, RTN_LOCAL) != 0) + goto drop; + skb = *pskb; + IP_VS_DBG_PKT(10, pp, skb, 0, "After SNAT"); ip_vs_out_stats(cp, skb); -- 2.39.5