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authorBob Hockney <bhockney@ix.netcom.com>2012-12-16 19:34:11 +0100
committerPablo Neira Ayuso <pablo@netfilter.org>2012-12-16 23:41:31 +0100
commit0c36b48b36dc84d4215dc9d1cde1bda829214ba6 (patch)
treec3af745bbb3a64c645ccb789c07c462e4108b70d /net/netfilter
parent97cf00e93cc24898493e7a058105e3215257ee04 (diff)
downloadlinux-stericsson-0c36b48b36dc84d4215dc9d1cde1bda829214ba6.tar.gz
netfilter: nfnetlink_log: fix mac address for 6in4 tunnels
For tunnelled ipv6in4 packets, the LOG target (xt_LOG.c) adjusts the start of the mac field to start at the ethernet header instead of the ipv4 header for the tunnel. This patch conforms what is passed by the NFLOG target through nfnetlink to what the LOG target does. Code borrowed from xt_LOG.c. Signed-off-by: Bob Hockney <bhockney@ix.netcom.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/netfilter')
-rw-r--r--net/netfilter/nfnetlink_log.c15
1 files changed, 12 insertions, 3 deletions
diff --git a/net/netfilter/nfnetlink_log.c b/net/netfilter/nfnetlink_log.c
index 9f199f2e31fa..4e210e0fd367 100644
--- a/net/netfilter/nfnetlink_log.c
+++ b/net/netfilter/nfnetlink_log.c
@@ -384,6 +384,7 @@ __build_packet_message(struct nfulnl_instance *inst,
struct nfgenmsg *nfmsg;
sk_buff_data_t old_tail = inst->skb->tail;
struct sock *sk;
+ const unsigned char *hwhdrp;
nlh = nlmsg_put(inst->skb, 0, 0,
NFNL_SUBSYS_ULOG << 8 | NFULNL_MSG_PACKET,
@@ -485,9 +486,17 @@ __build_packet_message(struct nfulnl_instance *inst,
if (indev && skb_mac_header_was_set(skb)) {
if (nla_put_be16(inst->skb, NFULA_HWTYPE, htons(skb->dev->type)) ||
nla_put_be16(inst->skb, NFULA_HWLEN,
- htons(skb->dev->hard_header_len)) ||
- nla_put(inst->skb, NFULA_HWHEADER, skb->dev->hard_header_len,
- skb_mac_header(skb)))
+ htons(skb->dev->hard_header_len)))
+ goto nla_put_failure;
+
+ hwhdrp = skb_mac_header(skb);
+
+ if (skb->dev->type == ARPHRD_SIT)
+ hwhdrp -= ETH_HLEN;
+
+ if (hwhdrp >= skb->head &&
+ nla_put(inst->skb, NFULA_HWHEADER,
+ skb->dev->hard_header_len, hwhdrp))
goto nla_put_failure;
}