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Add ability for packet sources to flag a packet's l2 or l3 checksum as valid.

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This lets packet source plugins implement handling of hardware checksum offloading, if available. Setting the flags will skip the internal checksumming for either layer 2 and/or layer 3.
This commit is contained in:
Tim Wojtulewicz 2020-03-06 15:36:35 -07:00
parent da5fca7163
commit c6f7665953
6 changed files with 19 additions and 5 deletions
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2
src/Sessions.cc
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@ -251,7 +251,7 @@ void NetSessions::DoNextPacket(double t, const Packet* pkt, const IP_Hdr* ip_hdr
if ( packet_filter && packet_filter->Match(ip_hdr, len, caplen) )
return;
if ( ! ignore_checksums && ip4 &&
if ( ! pkt->l2_checksummed && ! ignore_checksums && ip4 &&
ones_complement_checksum((void*) ip4, ip_hdr_len, 0) != 0xffff )
{
Weird("bad_IP_checksum", pkt, encapsulation);