Messages in this thread Patch in this message | | | From | Zoltan Kiss <> | Subject | [PATCH net-next 3/4 v5] pktgen: Fixing UPD checksum calculation | Date | Wed, 6 Aug 2014 19:17:03 +0100 |
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It passes port number instead of IP address for checksuming. The udp4_hwcsum() call is also bad, but my next patch will get rid of it anyway. The IPv6 code does it correctly already. It also changes replaces 8 with sizeof(struct udphdr)
Signed-off-by: Zoltan Kiss <zoltan.kiss@citrix.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Thomas Graf <tgraf@suug.ch> Cc: Joe Perches <joe@perches.com> Cc: netdev@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: xen-devel@lists.xenproject.org --- diff --git a/net/core/pktgen.c b/net/core/pktgen.c index ba61e2b..d8905cd 100644 --- a/net/core/pktgen.c +++ b/net/core/pktgen.c @@ -3061,8 +3061,9 @@ static struct sk_buff *fill_packet_ipv4(struct net_device *odev, __wsum csum = udp_csum(skb); /* add protocol-dependent pseudo-header */ - udph->check = csum_tcpudp_magic(udph->source, udph->dest, - datalen + 8, IPPROTO_UDP, csum); + udph->check = csum_tcpudp_magic(iph->saddr, iph->daddr, + datalen + sizeof(struct udphdr), + IPPROTO_UDP, csum); if (udph->check == 0) udph->check = CSUM_MANGLED_0;
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