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authorEric Dumazet <edumazet@google.com>2016-08-24 09:01:23 -0700
committerDavid S. Miller <davem@davemloft.net>2016-08-25 16:43:11 -0700
commit72145a68e4ee116533df49af4b87aca0aacc179c (patch)
tree31b022a336cbd4cb3554a7b3a46f1e9ec35f6e1c /net/ipv6/tcp_ipv6.c
parente65c332de8a0c9f570847ec490b60effffcd5320 (diff)
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/ipv6/tcp_ipv6.c')
-rw-r--r--net/ipv6/tcp_ipv6.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index ac0ed7bda406..e4f55683af31 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -671,6 +671,7 @@ static bool tcp_v6_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 %s for [%pI6c]:%u->[%pI6c]:%u\n",
genhash ? "failed" : "mismatch",
&ip6h->saddr, ntohs(th->source),