From 43488f288a5a4ec0c632c229cad088099842a3a9 Mon Sep 17 00:00:00 2001 From: Peng Fan Date: Tue, 29 Dec 2015 18:53:08 +0800 Subject: MLK-12101: net: bootp: fix dhcp when there is a bad dhcp server There is a bad dhcp server which always gives board ipaddr 0.0.0.0, and board can not get ipaddr from correct dhcp server, since the bad dhcp server always reply the board's dhcp packet with bad address. We can ignore the bad dhcp server by checking the assigned ipaddr, checking whether it is 0 or not. Signed-off-by: Peng Fan --- net/bootp.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/net/bootp.c b/net/bootp.c index 8106601..5331727 100644 --- a/net/bootp.c +++ b/net/bootp.c @@ -6,6 +6,7 @@ * Copyright 2000 Roland Borde * Copyright 2000 Paolo Scaffardi * Copyright 2000-2004 Wolfgang Denk, wd@denx.de + * Copyright (C) 2015 Freescale Semiconductor, Inc. */ #include @@ -949,6 +950,10 @@ DhcpHandler(uchar *pkt, unsigned dest, IPaddr_t sip, unsigned src, if (BootpCheckPkt(pkt, dest, src, len)) return; + /* Ignore pkts with ip address which is 0 */ + if (NetReadIP(&bp->bp_yiaddr) == 0) + return; + debug("DHCPHandler: got DHCP packet: (src=%d, dst=%d, len=%d) state:" " %d\n", src, dest, len, dhcp_state); -- cgit v1.1