diff options
| author | Vlad Yasevich <vladislav.yasevich@hp.com> | 2007-05-04 13:34:49 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2007-05-04 13:34:49 -0700 |
| commit | ce5325c1338acf965f4300f4976eac2129aeb439 (patch) | |
| tree | bd1da5c37d92568113c79ba47668a1c2a756811a /net/sctp/socket.c | |
| parent | 16d00fb7765a43a1b05989062e985d283b3a1f2d (diff) | |
| download | lwn-ce5325c1338acf965f4300f4976eac2129aeb439.tar.gz lwn-ce5325c1338acf965f4300f4976eac2129aeb439.zip | |
[SCTP]: Fix the SO_REUSEADDR handling to be similar to TCP.
Update the SO_REUSEADDR handling to also check for listen state. This
was muliple listening server sockets can't be created and they will
not steal packets from each other.
Reported by Paolo Galtieri <pgaltieri@mvista.com>
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp/socket.c')
| -rw-r--r-- | net/sctp/socket.c | 32 |
1 files changed, 22 insertions, 10 deletions
diff --git a/net/sctp/socket.c b/net/sctp/socket.c index b2ffab62a229..9f1a908776de 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -5020,7 +5020,8 @@ pp_found: struct hlist_node *node; SCTP_DEBUG_PRINTK("sctp_get_port() found a possible match\n"); - if (pp->fastreuse && sk->sk_reuse) + if (pp->fastreuse && sk->sk_reuse && + sk->sk_state != SCTP_SS_LISTENING) goto success; /* Run through the list of sockets bound to the port @@ -5037,7 +5038,8 @@ pp_found: struct sctp_endpoint *ep2; ep2 = sctp_sk(sk2)->ep; - if (reuse && sk2->sk_reuse) + if (reuse && sk2->sk_reuse && + sk2->sk_state != SCTP_SS_LISTENING) continue; if (sctp_bind_addr_match(&ep2->base.bind_addr, addr, @@ -5058,9 +5060,13 @@ pp_not_found: * if sk->sk_reuse is too (that is, if the caller requested * SO_REUSEADDR on this socket -sk-). */ - if (hlist_empty(&pp->owner)) - pp->fastreuse = sk->sk_reuse ? 1 : 0; - else if (pp->fastreuse && !sk->sk_reuse) + if (hlist_empty(&pp->owner)) { + if (sk->sk_reuse && sk->sk_state != SCTP_SS_LISTENING) + pp->fastreuse = 1; + else + pp->fastreuse = 0; + } else if (pp->fastreuse && + (!sk->sk_reuse || sk->sk_state == SCTP_SS_LISTENING)) pp->fastreuse = 0; /* We are set, so fill up all the data in the hash table @@ -5068,8 +5074,8 @@ pp_not_found: * sockets FIXME: Blurry, NPI (ipg). */ success: - inet_sk(sk)->num = snum; if (!sctp_sk(sk)->bind_hash) { + inet_sk(sk)->num = snum; sk_add_bind_node(sk, &pp->owner); sctp_sk(sk)->bind_hash = pp; } @@ -5142,12 +5148,16 @@ SCTP_STATIC int sctp_seqpacket_listen(struct sock *sk, int backlog) * This is not currently spelled out in the SCTP sockets * extensions draft, but follows the practice as seen in TCP * sockets. + * + * Additionally, turn off fastreuse flag since we are not listening */ + sk->sk_state = SCTP_SS_LISTENING; if (!ep->base.bind_addr.port) { if (sctp_autobind(sk)) return -EAGAIN; - } - sk->sk_state = SCTP_SS_LISTENING; + } else + sctp_sk(sk)->bind_hash->fastreuse = 0; + sctp_hash_endpoint(ep); return 0; } @@ -5185,11 +5195,13 @@ SCTP_STATIC int sctp_stream_listen(struct sock *sk, int backlog) * extensions draft, but follows the practice as seen in TCP * sockets. */ + sk->sk_state = SCTP_SS_LISTENING; if (!ep->base.bind_addr.port) { if (sctp_autobind(sk)) return -EAGAIN; - } - sk->sk_state = SCTP_SS_LISTENING; + } else + sctp_sk(sk)->bind_hash->fastreuse = 0; + sk->sk_max_ack_backlog = backlog; sctp_hash_endpoint(ep); return 0; |