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net: Add additional IP fragmentation check

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Ignore IP packets which have the "more fragments" flag bit
set.  This flag indicates the IP packet is fragmented and
must be ignored by U-Boot.

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
This commit is contained in:
Peter Tyser 2008-12-01 16:26:21 -06:00 committed by Ben Warren
parent e0c07b868c
commit d32c5be50b
1 changed files with 2 additions and 1 deletions
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3
net/net.c
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@ -1399,7 +1399,8 @@ NetReceive(volatile uchar * inpkt, int len)
if ((ip->ip_hl_v & 0xf0) != 0x40) { if ((ip->ip_hl_v & 0xf0) != 0x40) {
return; return;
} }
if (ip->ip_off & htons(IP_OFFS)) { /* Can't deal w/ fragments */ /* Can't deal with fragments */
if (ip->ip_off & htons(IP_OFFS | IP_FLAGS_MFRAG)) {
return; return;
} }
/* can't deal with headers > 20 bytes */ /* can't deal with headers > 20 bytes */