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authorPatrick McHardy <kaber@trash.net>2009-08-25 15:33:08 +0200
committerPatrick McHardy <kaber@trash.net>2009-08-25 15:33:08 +0200
commit74f7a6552c8d76ffc5e11eb8d9d6c07238b9ae77 (patch)
tree8ab3e8dd361de4d2f11536523aa5f0113272050e /net/ipv4/netfilter
parentf3abc9b963e004b8c96cd7fbee6fd905f2bfd620 (diff)
netfilter: nf_conntrack: log packets dropped by helpers
Log packets dropped by helpers using the netfilter logging API. This is useful in combination with nfnetlink_log to analyze those packets in userspace for debugging. Signed-off-by: Patrick McHardy <kaber@trash.net>
Diffstat (limited to 'net/ipv4/netfilter')
-rw-r--r--net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
index 9ac2fdc36ec..aa95bb82ee6 100644
--- a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
+++ b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
@@ -26,6 +26,7 @@
#include <net/netfilter/ipv4/nf_conntrack_ipv4.h>
#include <net/netfilter/nf_nat_helper.h>
#include <net/netfilter/ipv4/nf_defrag_ipv4.h>
+#include <net/netfilter/nf_log.h>
int (*nf_nat_seq_adjust_hook)(struct sk_buff *skb,
struct nf_conn *ct,
@@ -113,8 +114,11 @@ static unsigned int ipv4_confirm(unsigned int hooknum,
ret = helper->help(skb, skb_network_offset(skb) + ip_hdrlen(skb),
ct, ctinfo);
- if (ret != NF_ACCEPT)
+ if (ret != NF_ACCEPT) {
+ nf_log_packet(NFPROTO_IPV4, hooknum, skb, in, out, NULL,
+ "nf_ct_%s: dropping packet", helper->name);
return ret;
+ }
if (test_bit(IPS_SEQ_ADJUST_BIT, &ct->status)) {
typeof(nf_nat_seq_adjust_hook) seq_adjust;