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| author | David S. Miller <davem@davemloft.net> | 2008-07-30 03:03:15 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-07-30 03:27:25 -0700 |
| commit | 785957d3e8c6fb37b18bf671923a76dbd8240025 (patch) | |
| tree | 59f089e4bd109ad9d896c6e6a0f1699f42a34136 /net/ipv6/tcp_ipv6.c | |
| parent | 8d50b53d66a8a6ae41bafbdcabe401467803f33a (diff) | |
| download | linux-785957d3e8c6fb37b18bf671923a76dbd8240025.tar.gz linux-785957d3e8c6fb37b18bf671923a76dbd8240025.tar.bz2 linux-785957d3e8c6fb37b18bf671923a76dbd8240025.zip | |
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/tcp_ipv6.c')
| -rw-r--r-- | net/ipv6/tcp_ipv6.c | 27 |
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; } |