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bootp: Prevent u-boot from using others responses.

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In rare circumstances two dhcp clients may generate the same
bootp ID. If this happens it is vital that the client also checks
the hw address in the received response to prevent IP address conflicts.

Signed-off-by: Anton Persson <don.juanton@gmail.com>
This commit is contained in:
Anton Persson 2016-03-17 09:38:21 +01:00 committed by Tom Rini
parent a481a15600
commit 214cc905de
1 changed files with 2 additions and 0 deletions
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net/bootp.c
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@ -132,6 +132,8 @@ static int check_reply_packet(uchar *pkt, unsigned dest, unsigned src,
retval = -5;
else if (!bootp_match_id(net_read_u32(&bp->bp_id)))
retval = -6;
else if (memcmp(bp->bp_chaddr, net_ethaddr, HWL_ETHER) != 0)
retval = -7;
debug("Filtering pkt = %d\n", retval);