tree f750973ce4939025d12cc31b4849c8dcd1b48b89
parent aae0e68909bf2ef1b60d18c54105ab8b9c67c5a2
author Peng Fan <peng.fan@nxp.com> 1452151703 +0800
committer Joe Hershberger <joe.hershberger@ni.com> 1454005343 -0600

net: bootp: Ignore packets whose yiaddr is 0

When doing `dhcp`, there is a bad dhcp server in my network
which always reply dhcp request with yiaddr 0, which cause
uboot can not successfully get ipaddr from the good dhcp server.
But the Linux PC can get the ip address even if there is a bad
dhcp server. This patch is to fix that even if there is a bad
dhcp server, uboot can still get ipaddr and tftp work ok.

The way is to ignore the packets from the bad dhcp server by filtering
out the yiaddr whose value is 0.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Cc: Joe Hershberger <joe.hershberger@ni.com>
Reviewed-by: Wolfgang Denk <wd@denx.de>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>