Hello!
I'm hacking on (my already hacked) pktgen, trying to get it to send TCP frames.
And, having issues getting checksums to work properly.
I'm trying this:
struct iphdr *iph = ip_hdr(skb);
struct net_device *odev = pkt_dev->odev;
if (pkt_dev->flags & F_TCP) {
if (odev->features & NETIF_F_V4_CSUM) {
skb->ip_summed = CHECKSUM_PARTIAL;
} else {
skb->ip_summed = CHECKSUM_NONE;
}
skb->csum = 0;
__tcp_v4_send_check(skb, iph->saddr, iph->daddr);
I added an export so I could call that __tcp_v4_send_check method
w/out having to put a fake socket struct on the stack.
But, the receiving NIC reports 100% checksum failure, so obviously
I'm not doing it correct.
Any suggestions on what I might be doing wrong or the proper method(s)
to call?
Thanks,
Ben
--
Ben Greear <[email protected]>
Candela Technologies Inc http://www.candelatech.com
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