netfilter: nfnetlink_log: send complete hardware header

This patch adds some fields to NFLOG to be able to send the complete
hardware header with all necessary informations.
It sends to userspace:
 * the type of hardware link
 * the lenght of hardware header
 * the hardware header

Signed-off-by: Eric Leblond <eric@inl.fr>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 8 insertions, 0 deletions

diff --git a/net/netfilter/nfnetlink_log.c b/net/netfilter/nfnetlink_log.c
index b8173af8c24a..9a35b57ab76d 100644
--- a/net/netfilter/nfnetlink_log.c
+++ b/net/netfilter/nfnetlink_log.c
@@ -453,6 +453,14 @@ __build_packet_message(struct nfulnl_instance *inst,
                 }
         }
 
+        if (indev && skb_mac_header_was_set(skb)) {
+                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));
+        }
+
         if (skb->tstamp.tv64) {
                 struct nfulnl_msg_packet_timestamp ts;
                 struct timeval tv = ktime_to_timeval(skb->tstamp);