diff options
| author | Eric Dumazet <eric.dumazet@gmail.com> | 2010-04-21 09:26:15 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-04-22 19:06:06 -0700 |
| commit | fda48a0d7a8412cedacda46a9c0bf8ef9cd13559 (patch) | |
| tree | f749b26dea4353c6f3bd95e49fafceb06623c20b /net/ipv6 | |
| parent | 24acc6895616b373475e92e49925efc3ef591563 (diff) | |
| download | linux-fda48a0d7a8412cedacda46a9c0bf8ef9cd13559.tar.bz2 | |
tcp: bind() fix when many ports are bound
Port autoselection done by kernel only works when number of bound
sockets is under a threshold (typically 30000).
When this threshold is over, we must check if there is a conflict before
exiting first loop in inet_csk_get_port()
Change inet_csk_bind_conflict() to forbid two reuse-enabled sockets to
bind on same (address,port) tuple (with a non ANY address)
Same change for inet6_csk_bind_conflict()
Reported-by: Gaspar Chilingarov <gasparch@gmail.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
| -rw-r--r-- | net/ipv6/inet6_connection_sock.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/net/ipv6/inet6_connection_sock.c b/net/ipv6/inet6_connection_sock.c index 628db24bcf22..b4b7d40a9c95 100644 --- a/net/ipv6/inet6_connection_sock.c +++ b/net/ipv6/inet6_connection_sock.c @@ -42,11 +42,16 @@ int inet6_csk_bind_conflict(const struct sock *sk, if (sk != sk2 && (!sk->sk_bound_dev_if || !sk2->sk_bound_dev_if || - sk->sk_bound_dev_if == sk2->sk_bound_dev_if) && - (!sk->sk_reuse || !sk2->sk_reuse || - sk2->sk_state == TCP_LISTEN) && - ipv6_rcv_saddr_equal(sk, sk2)) - break; + sk->sk_bound_dev_if == sk2->sk_bound_dev_if)) { + if ((!sk->sk_reuse || !sk2->sk_reuse || + sk2->sk_state == TCP_LISTEN) && + ipv6_rcv_saddr_equal(sk, sk2)) + break; + else if (sk->sk_reuse && sk2->sk_reuse && + !ipv6_addr_any(inet6_rcv_saddr(sk2)) && + ipv6_rcv_saddr_equal(sk, sk2)) + break; + } } return node != NULL; |