[patch 53/54] TCP: Use default 32768-61000 outgoing port range in all cases.

[Chris Wright]

-stable review patch.  If anyone has any objections, please let us know.
---------------------

From: Mark Glines <mark@xxxxxxxxxx>

This diff changes the default port range used for outgoing connections,
from "use 32768-61000 in most cases, but use N-4999 on small boxes
(where N is a multiple of 1024, depending on just *how* small the box
is)" to just "use 32768-61000 in all cases".

I don't believe there are any drawbacks to this change, and it keeps
outgoing connection ports farther away from the mess of
IANA-registered ports.

Signed-off-by: Mark Glines <mark@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Chris Wright <chrisw@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
 net/ipv4/inet_connection_sock.c |    4 +---
 net/ipv4/tcp.c                  |    3 ---
 2 files changed, 1 insertion(+), 6 deletions(-)

--- linux-2.6.21.4.orig/net/ipv4/inet_connection_sock.c
+++ linux-2.6.21.4/net/ipv4/inet_connection_sock.c
@@ -31,10 +31,8 @@ EXPORT_SYMBOL(inet_csk_timer_bug_msg);
 
 /*
  * This array holds the first and last local port number.
- * For high-usage systems, use sysctl to change this to
- * 32768-61000
  */
-int sysctl_local_port_range[2] = { 1024, 4999 };
+int sysctl_local_port_range[2] = { 32768, 61000 };
 
 int inet_csk_bind_conflict(const struct sock *sk,
 			   const struct inet_bind_bucket *tb)
--- linux-2.6.21.4.orig/net/ipv4/tcp.c
+++ linux-2.6.21.4/net/ipv4/tcp.c
@@ -2445,13 +2445,10 @@ void __init tcp_init(void)
 			order++)
 		;
 	if (order >= 4) {
-		sysctl_local_port_range[0] = 32768;
-		sysctl_local_port_range[1] = 61000;
 		tcp_death_row.sysctl_max_tw_buckets = 180000;
 		sysctl_tcp_max_orphans = 4096 << (order - 4);
 		sysctl_max_syn_backlog = 1024;
 	} else if (order < 3) {
-		sysctl_local_port_range[0] = 1024 * (3 - order);
 		tcp_death_row.sysctl_max_tw_buckets >>= (3 - order);
 		sysctl_tcp_max_orphans >>= (3 - order);
 		sysctl_max_syn_backlog = 128;

-- 
-
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