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net/icmpv4: A checksum value of 0 is valid

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Introduced by commit id de78a7af28.
If the sum is 0xffff, a ~sum will give 0.

Fixes #12164

Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
This commit is contained in:
Tomasz Bursztyka 2019-01-03 12:03:21 +01:00 committed by Anas Nashif
parent 5748fe11e5
commit e82e31e351
1 changed files with 1 additions and 1 deletions
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2
subsys/net/ip/icmpv4.c
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@ -338,7 +338,7 @@ enum net_verdict net_icmpv4_input(struct net_pkt *pkt, bool bcast)
return NET_DROP;
}
if (!icmp_hdr.chksum || net_calc_chksum_icmpv4(pkt) != 0) {
if (net_calc_chksum_icmpv4(pkt) != 0) {
NET_DBG("DROP: Invalid checksum");
goto drop;
}