| commit | b5d757ae6de3b28f326644c63f7e2b9df4109764 | |
| author | Tobias Klauser <tklauser@distanz.ch> | |
| Mon, 2 Nov 2015 15:33:54 +0000 (2 16:33 +0100) | ||
| committer | Tobias Klauser <tklauser@distanz.ch> | |
| Mon, 2 Nov 2015 15:33:54 +0000 (2 16:33 +0100) | ||
| tree | 82db80b1e06ae1a25784d39b107bfcbea677e442 | treesnapshot (tar.gz zip) |
| parent | dddf36f0b747dde13fe6af4d368c927c8d1c76c9 | commitdiff |
trafgen: Pre-calculate checksums if possible
The TCP/UDP checksums cannot be calculated in the parser as the packet
payload following the TCP/UDP header is not yet know. However, we can
calculate these checksums before the send loop if the only dynamic
elements of the packet are checksums.
This change avoids the overhead of recalculating the checksums for every
iteration the send loop in these cases.
Suggested-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
The TCP/UDP checksums cannot be calculated in the parser as the packet
payload following the TCP/UDP header is not yet know. However, we can
calculate these checksums before the send loop if the only dynamic
elements of the packet are checksums.
This change avoids the overhead of recalculating the checksums for every
iteration the send loop in these cases.
Suggested-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
| trafgen.c | diffblobblamehistory |