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update tcp checksumming

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Nico Schottelius 2019-07-15 16:48:24 +02:00
commit f0900c3821
2 changed files with 18 additions and 3 deletions
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10
p4src/actions_delta_checksum.p4
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@ -73,14 +73,18 @@ action delta_udp_from_v4_to_v6()
action delta_tcp_from_v4_to_v6()
{
delta_prepare();
hdr.tcp.checksum = hdr.tcp.checksum + meta.headerdiff;
v4sum();
v6sum();
/* here is also a possible overflow in both directions */
hdr.tcp.checksum = hdr.tcp.checksum + meta.v6sum - meta.v4sum;
}
action delta_ipv4_from_v6_to_v4()
{
delta_prepare();
hdr.tcp.checksum = hdr.tcp.checksum + ~meta.headerdiff;
/* TO BE DONE! */
}
#endif