commit 1f33e4f29e8cf4ba14e75d8fa37fd9ba0ea09c53
author Nikunj A Dadhania <nikunj@linux.vnet.ibm.com> Tue Oct 28 16:09:17 2014 +0530
committer Nikunj A Dadhania <nikunj@linux.vnet.ibm.com> Wed Oct 29 17:02:08 2014 +0530
tree f84498b942fa111803bf223dd1389b12132dcb6b
parent b931c7bc10a3c29a8ca0e693d4dfb94f17311451

ipv4: Fix send packet across a subnet

The send packet code does understand that the IP is not part of the
current network and needs to use the router. And then tries to get the
MAC address of the router IP from arp cache, that fails. This is
becuase there was no ARP Request send for the router IP.

So in case when there is router involved, send arp request for the
router IP and after the reply, we have the router mac cached to
communicate with.

Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>