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authorAmerigo Wang <amwang@redhat.com>2010-05-05 04:27:06 +0400
committerDavid S. Miller <davem@davemloft.net>2010-05-16 10:28:40 +0400
commite3826f1e946e7d2354943232f1457be1455a29e2 (patch)
treea34055c7de762410b6a10c21ab5e1999fb38803b /net/ipv4/af_inet.c
parent9f977fb7ae9ddf565b4800854212fb9a1ed6c2ea (diff)
downloadlinux-e3826f1e946e7d2354943232f1457be1455a29e2.tar.xz
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/af_inet.c')
-rw-r--r--net/ipv4/af_inet.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index c6c43bcd1c6f..551ce564b035 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -1573,9 +1573,13 @@ static int __init inet_init(void)
BUILD_BUG_ON(sizeof(struct inet_skb_parm) > sizeof(dummy_skb->cb));
+ sysctl_local_reserved_ports = kzalloc(65536 / 8, GFP_KERNEL);
+ if (!sysctl_local_reserved_ports)
+ goto out;
+
rc = proto_register(&tcp_prot, 1);
if (rc)
- goto out;
+ goto out_free_reserved_ports;
rc = proto_register(&udp_prot, 1);
if (rc)
@@ -1674,6 +1678,8 @@ out_unregister_udp_proto:
proto_unregister(&udp_prot);
out_unregister_tcp_proto:
proto_unregister(&tcp_prot);
+out_free_reserved_ports:
+ kfree(sysctl_local_reserved_ports);
goto out;
}