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authorAmerigo Wang <amwang@redhat.com>2010-05-04 20:27:06 -0400
committerDavid S. Miller <davem@davemloft.net>2010-05-16 02:28:40 -0400
commite3826f1e946e7d2354943232f1457be1455a29e2 (patch)
treea34055c7de762410b6a10c21ab5e1999fb38803b /net/sctp/socket.c
parent9f977fb7ae9ddf565b4800854212fb9a1ed6c2ea (diff)
net: reserve ports for applications using fixed port numbers
(Dropped the infiniband part, because Tetsuo modified the related code, I will send a separate patch for it once this is accepted.) This patch introduces /proc/sys/net/ipv4/ip_local_reserved_ports which allows users to reserve ports for third-party applications. The reserved ports will not be used by automatic port assignments (e.g. when calling connect() or bind() with port number 0). Explicit port allocation behavior is unchanged. Signed-off-by: Octavian Purdila <opurdila@ixiacom.com> Signed-off-by: WANG Cong <amwang@redhat.com> Cc: Neil Horman <nhorman@tuxdriver.com> Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp/socket.c')
-rw-r--r--net/sctp/socket.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index ba1add0b13c3..ca44917872d2 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -5433,6 +5433,8 @@ static long sctp_get_port_local(struct sock *sk, union sctp_addr *addr)
5433 rover++; 5433 rover++;
5434 if ((rover < low) || (rover > high)) 5434 if ((rover < low) || (rover > high))
5435 rover = low; 5435 rover = low;
5436 if (inet_is_reserved_local_port(rover))
5437 continue;
5436 index = sctp_phashfn(rover); 5438 index = sctp_phashfn(rover);
5437 head = &sctp_port_hashtable[index]; 5439 head = &sctp_port_hashtable[index];
5438 sctp_spin_lock(&head->lock); 5440 sctp_spin_lock(&head->lock);