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authorDavid S. Miller <davem@davemloft.net>2008-07-30 03:03:15 -0700
committerDavid S. Miller <davem@davemloft.net>2008-07-30 03:27:25 -0700
commit785957d3e8c6fb37b18bf671923a76dbd8240025 (patch)
tree59f089e4bd109ad9d896c6e6a0f1699f42a34136 /net/ipv6
parent8d50b53d66a8a6ae41bafbdcabe401467803f33a (diff)
downloadlinux-785957d3e8c6fb37b18bf671923a76dbd8240025.tar.bz2
tcp: MD5: Use MIB counter instead of warning for MD5 mismatch.
From a report by Matti Aarnio, and preliminary patch by Adam Langley. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
-rw-r--r--net/ipv6/tcp_ipv6.c27
1 files changed, 8 insertions, 19 deletions
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index cff778b23a7f..1db45216b232 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -849,28 +849,17 @@ static int tcp_v6_inbound_md5_hash (struct sock *sk, struct sk_buff *skb)
hash_expected = tcp_v6_md5_do_lookup(sk, &ip6h->saddr);
hash_location = tcp_parse_md5sig_option(th);
- /* do we have a hash as expected? */
- if (!hash_expected) {
- if (!hash_location)
- return 0;
- if (net_ratelimit()) {
- printk(KERN_INFO "MD5 Hash NOT expected but found "
- "(" NIP6_FMT ", %u)->"
- "(" NIP6_FMT ", %u)\n",
- NIP6(ip6h->saddr), ntohs(th->source),
- NIP6(ip6h->daddr), ntohs(th->dest));
- }
+ /* We've parsed the options - do we have a hash? */
+ if (!hash_expected && !hash_location)
+ return 0;
+
+ if (hash_expected && !hash_location) {
+ NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPMD5NOTFOUND);
return 1;
}
- if (!hash_location) {
- if (net_ratelimit()) {
- printk(KERN_INFO "MD5 Hash expected but NOT found "
- "(" NIP6_FMT ", %u)->"
- "(" NIP6_FMT ", %u)\n",
- NIP6(ip6h->saddr), ntohs(th->source),
- NIP6(ip6h->daddr), ntohs(th->dest));
- }
+ if (!hash_expected && hash_location) {
+ NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_TCPMD5UNEXPECTED);
return 1;
}