Re: [PATCH] ipv4/route.c: respect prefsrc for local routes

[David Miller <davem@davemloft.net>]

From: Joel Sing <jsing@google.com>
Date: Tue,  4 Jan 2011 17:24:20 +1100

> The preferred source address is currently ignored for local routes,
> which results in all local connections having a src address that is the
> same as the local dst address. Fix this by respecting the preferred source
> address when it is provided for local routes.
> 
> This bug can be demonstrated as follows:
> 
>  # ifconfig dummy0 192.168.0.1
>  # ip route show table local | grep local.*dummy0
>  local 192.168.0.1 dev dummy0  proto kernel  scope host  src 192.168.0.1
>  # ip route change table local local 192.168.0.1 dev dummy0 \
>      proto kernel scope host src 127.0.0.1
>  # ip route show table local | grep local.*dummy0
>  local 192.168.0.1 dev dummy0  proto kernel  scope host  src 127.0.0.1
> 
> We now establish a local connection and verify the source IP
> address selection:
> 
>  # nc -l 192.168.0.1 3128 &
>  # nc 192.168.0.1 3128 &
>  # netstat -ant | grep 192.168.0.1:3128.*EST
>  tcp        0      0 192.168.0.1:3128        192.168.0.1:33228 ESTABLISHED
>  tcp        0      0 192.168.0.1:33228       192.168.0.1:3128  ESTABLISHED
> 
> Signed-off-by: Joel Sing <jsing@google.com>

Applied to net-2.6, thanks Joel.

If you guys want to mess with ternary operators and new macros,
please do that in net-next-2.6 the next time I merge or similar.

Thanks.