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05 April 2024, 19:05:47 UTC
Revision 9fc3bbb4a752f108cf096d96640f3b548bbbce6c authored by Joel Sing on 03 January 2011, 20:24:20 UTC, committed by David S. Miller on 04 January 2011, 19:35:12 UTC 
ipv4/route.c: respect prefsrc for local routes
 
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>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent e6f2612
History
Tip revision: 9fc3bbb4a752f108cf096d96640f3b548bbbce6c authored by Joel Sing on 03 January 2011, 20:24:20 UTC
ipv4/route.c: respect prefsrc for local routes
Tip revision: 9fc3bbb
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