From 3e3850e989c5d2eb1aab6f0fd9257759f0f4cbc6 Mon Sep 17 00:00:00 2001 From: Patrick McHardy Date: Fri, 6 Jan 2006 23:04:54 -0800 Subject: [NETFILTER]: Fix xfrm lookup in ip_route_me_harder/ip6_route_me_harder ip_route_me_harder doesn't use the port numbers of the xfrm lookup and uses ip_route_input for non-local addresses which doesn't do a xfrm lookup, ip6_route_me_harder doesn't do a xfrm lookup at all. Use xfrm_decode_session and do the lookup manually, make sure both only do the lookup if the packet hasn't been transformed already. Makeing sure the lookup only happens once needs a new field in the IP6CB, which exceeds the size of skb->cb. The size of skb->cb is increased to 48b. Apparently the IPv6 mobile extensions need some more room anyway. Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller --- net/ipv4/netfilter.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) (limited to 'net/ipv4/netfilter.c') diff --git a/net/ipv4/netfilter.c b/net/ipv4/netfilter.c index ae0779d82c5d..4c637a1cbd23 100644 --- a/net/ipv4/netfilter.c +++ b/net/ipv4/netfilter.c @@ -7,11 +7,13 @@ #include #include +#include #include #include #include #include -#include +#include +#include /* route_me_harder function, used by iptable_nat, iptable_mangle + ip_queue */ int ip_route_me_harder(struct sk_buff **pskb) @@ -33,7 +35,6 @@ int ip_route_me_harder(struct sk_buff **pskb) #ifdef CONFIG_IP_ROUTE_FWMARK fl.nl_u.ip4_u.fwmark = (*pskb)->nfmark; #endif - fl.proto = iph->protocol; if (ip_route_output_key(&rt, &fl) != 0) return -1; @@ -60,6 +61,13 @@ int ip_route_me_harder(struct sk_buff **pskb) if ((*pskb)->dst->error) return -1; +#ifdef CONFIG_XFRM + if (!(IPCB(*pskb)->flags & IPSKB_XFRM_TRANSFORMED) && + xfrm_decode_session(*pskb, &fl, AF_INET) == 0) + if (xfrm_lookup(&(*pskb)->dst, &fl, (*pskb)->sk, 0)) + return -1; +#endif + /* Change in oif may mean change in hh_len. */ hh_len = (*pskb)->dst->dev->hard_header_len; if (skb_headroom(*pskb) < hh_len) { -- cgit v1.2.3-59-g8ed1b