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authorEric Dumazet <edumazet@google.com>2016-08-24 19:01:23 +0300
committerDavid S. Miller <davem@davemloft.net>2016-08-26 02:43:11 +0300
commit72145a68e4ee116533df49af4b87aca0aacc179c (patch)
tree31b022a336cbd4cb3554a7b3a46f1e9ec35f6e1c /net/ipv4/tcp_ipv4.c
parente65c332de8a0c9f570847ec490b60effffcd5320 (diff)
downloadlinux-72145a68e4ee116533df49af4b87aca0aacc179c.tar.xz
tcp: md5: add LINUX_MIB_TCPMD5FAILURE counter
Adds SNMP counter for drops caused by MD5 mismatches. The current syslog might help, but a counter is more precise and helps monitoring. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_ipv4.c')
-rw-r--r--net/ipv4/tcp_ipv4.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 436d978c6c39..ad41e8ecf796 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -1169,6 +1169,7 @@ static bool tcp_v4_inbound_md5_hash(const struct sock *sk,
NULL, skb);
if (genhash || memcmp(hash_location, newhash, 16) != 0) {
+ NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPMD5FAILURE);
net_info_ratelimited("MD5 Hash failed for (%pI4, %d)->(%pI4, %d)%s\n",
&iph->saddr, ntohs(th->source),
&iph->daddr, ntohs(th->dest),