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| author | Amerigo Wang <amwang@redhat.com> | 2010-05-05 00:27:06 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-05-15 23:28:40 -0700 |
| commit | e3826f1e946e7d2354943232f1457be1455a29e2 (patch) | |
| tree | a34055c7de762410b6a10c21ab5e1999fb38803b /net/ipv4/inet_hashtables.c | |
| parent | 9f977fb7ae9ddf565b4800854212fb9a1ed6c2ea (diff) | |
| download | linux-e3826f1e946e7d2354943232f1457be1455a29e2.tar.gz linux-e3826f1e946e7d2354943232f1457be1455a29e2.tar.bz2 linux-e3826f1e946e7d2354943232f1457be1455a29e2.zip | |
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/ipv4/inet_hashtables.c')
| -rw-r--r-- | net/ipv4/inet_hashtables.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/ipv4/inet_hashtables.c b/net/ipv4/inet_hashtables.c index 2b79377b468d..d3e160a88219 100644 --- a/net/ipv4/inet_hashtables.c +++ b/net/ipv4/inet_hashtables.c @@ -456,6 +456,8 @@ int __inet_hash_connect(struct inet_timewait_death_row *death_row, local_bh_disable(); for (i = 1; i <= remaining; i++) { port = low + (i + offset) % remaining; + if (inet_is_reserved_local_port(port)) + continue; head = &hinfo->bhash[inet_bhashfn(net, port, hinfo->bhash_size)]; spin_lock(&head->lock); |