diff options
| author | Christoph Paasch <christoph.paasch@uclouvain.be> | 2014-01-22 16:58:44 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-01-24 00:48:28 +0400 |
| commit | 3ad88cf70af79e6f19c4f89dd85453ba4fdf425e (patch) | |
| tree | 3717f53d734cecb7945638846f19477dad3ea8d0 /net/ipv4 | |
| parent | 5ae5e991ee6274cc269dabd536399146be038a0f (diff) | |
| download | linux-3ad88cf70af79e6f19c4f89dd85453ba4fdf425e.tar.xz | |
tcp: metrics: Handle v6/v4-mapped sockets in tcp-metrics
A socket may be v6/v4-mapped. In that case sk->sk_family is AF_INET6,
but the IP being used is actually an IPv4-address.
Current's tcp-metrics will thus represent it as an IPv6-address:
root@server:~# ip tcp_metrics
::ffff:10.1.1.2 age 22.920sec rtt 18750us rttvar 15000us cwnd 10
10.1.1.2 age 47.970sec rtt 16250us rttvar 10000us cwnd 10
This patch modifies the tcp-metrics so that they are able to handle the
v6/v4-mapped sockets correctly.
Signed-off-by: Christoph Paasch <christoph.paasch@uclouvain.be>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/tcp_metrics.c | 64 |
1 files changed, 40 insertions, 24 deletions
diff --git a/net/ipv4/tcp_metrics.c b/net/ipv4/tcp_metrics.c index 9ae48b4a37d1..d547075d8300 100644 --- a/net/ipv4/tcp_metrics.c +++ b/net/ipv4/tcp_metrics.c @@ -274,24 +274,32 @@ static struct tcp_metrics_block *__tcp_get_metrics_tw(struct inet_timewait_sock unsigned int hash; struct net *net; - saddr.family = tw->tw_family; - daddr.family = tw->tw_family; - switch (daddr.family) { - case AF_INET: + if (tw->tw_family == AF_INET) { + saddr.family = AF_INET; saddr.addr.a4 = tw->tw_rcv_saddr; + daddr.family = AF_INET; daddr.addr.a4 = tw->tw_daddr; hash = (__force unsigned int) daddr.addr.a4; - break; + } #if IS_ENABLED(CONFIG_IPV6) - case AF_INET6: - *(struct in6_addr *)saddr.addr.a6 = tw->tw_v6_rcv_saddr; - *(struct in6_addr *)daddr.addr.a6 = tw->tw_v6_daddr; - hash = ipv6_addr_hash(&tw->tw_v6_daddr); - break; + else if (tw->tw_family == AF_INET6) { + if (ipv6_addr_v4mapped(&tw->tw_v6_daddr)) { + saddr.family = AF_INET; + saddr.addr.a4 = tw->tw_rcv_saddr; + daddr.family = AF_INET; + daddr.addr.a4 = tw->tw_daddr; + hash = (__force unsigned int) daddr.addr.a4; + } else { + saddr.family = AF_INET6; + *(struct in6_addr *)saddr.addr.a6 = tw->tw_v6_rcv_saddr; + daddr.family = AF_INET6; + *(struct in6_addr *)daddr.addr.a6 = tw->tw_v6_daddr; + hash = ipv6_addr_hash(&tw->tw_v6_daddr); + } + } #endif - default: + else return NULL; - } net = twsk_net(tw); hash = hash_32(hash, net->ipv4.tcp_metrics_hash_log); @@ -314,24 +322,32 @@ static struct tcp_metrics_block *tcp_get_metrics(struct sock *sk, unsigned int hash; struct net *net; - saddr.family = sk->sk_family; - daddr.family = sk->sk_family; - switch (daddr.family) { - case AF_INET: + if (sk->sk_family == AF_INET) { + saddr.family = AF_INET; saddr.addr.a4 = inet_sk(sk)->inet_saddr; + daddr.family = AF_INET; daddr.addr.a4 = inet_sk(sk)->inet_daddr; hash = (__force unsigned int) daddr.addr.a4; - break; + } #if IS_ENABLED(CONFIG_IPV6) - case AF_INET6: - *(struct in6_addr *)saddr.addr.a6 = sk->sk_v6_rcv_saddr; - *(struct in6_addr *)daddr.addr.a6 = sk->sk_v6_daddr; - hash = ipv6_addr_hash(&sk->sk_v6_daddr); - break; + else if (sk->sk_family == AF_INET6) { + if (ipv6_addr_v4mapped(&sk->sk_v6_daddr)) { + saddr.family = AF_INET; + saddr.addr.a4 = inet_sk(sk)->inet_saddr; + daddr.family = AF_INET; + daddr.addr.a4 = inet_sk(sk)->inet_daddr; + hash = (__force unsigned int) daddr.addr.a4; + } else { + saddr.family = AF_INET6; + *(struct in6_addr *)saddr.addr.a6 = sk->sk_v6_rcv_saddr; + daddr.family = AF_INET6; + *(struct in6_addr *)daddr.addr.a6 = sk->sk_v6_daddr; + hash = ipv6_addr_hash(&sk->sk_v6_daddr); + } + } #endif - default: + else return NULL; - } net = dev_net(dst->dev); hash = hash_32(hash, net->ipv4.tcp_metrics_hash_log); |