From: Casey Carter <Casey@Carter.net>
To: netdev@oss.sgi.com
Subject: [PATCH] Make SO_BINDTODEVICE bind very tightly
Date: Tue, 07 Oct 2003 17:16:25 -0500 [thread overview]
Message-ID: <3F833B39.4020606@Carter.net> (raw)
[-- Attachment #1: Type: text/plain, Size: 497 bytes --]
In the presence of both sockets that are and sockets that are not bound
to a specific interface, those bound to the interface should always be
favored for packet delivery over those not so bound. Attached patch
(against 2.6.0-test6) enforces these semantics by a slight adjustment to
udp_v4_lookup_longway in net/ipv4/udp.c The consequence of this change
is to make SO_BINDTODEVICE bind more tightly than simple bind().
--
Casey Carter
Casey@Carter.net
ccarter@cs.uiuc.edu
AIM: cartec69
[-- Attachment #2: udp.c.diff --]
[-- Type: text/plain, Size: 398 bytes --]
--- linux-2.6.0-test6/net/ipv4/udp.c 2003-09-27 19:50:10.000000000 -0500
+++ linux-2.6.0-test6-patch/net/ipv4/udp.c 2003-10-07 17:08:10.000000000 -0500
@@ -246,9 +246,9 @@
if (sk->sk_bound_dev_if) {
if (sk->sk_bound_dev_if != dif)
continue;
- score+=2;
+ score+=8;
}
- if(score == 9) {
+ if(score == 15) {
result = sk;
break;
} else if(score > badness) {
next reply other threads:[~2003-10-07 22:16 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-10-07 22:16 Casey Carter [this message]
2003-10-08 11:49 ` [PATCH] Make SO_BINDTODEVICE bind very tightly David S. Miller
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