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Do not lookup ignore_checksums_nets for every packet

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This could lead to a noticeable (single-percent) performance
improvement.

Most of the functionality for this is in the packet analyzers that now
cache ignore_chesksums_nets.

Based on a patch by Arne Welzel (Corelight).
This commit is contained in:
Johanna Amann 2021-08-06 10:32:53 +01:00
parent d24cecf268
commit 8192ad581d
13 changed files with 101 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

15
src/packet_analysis/protocol/ip/IPBasedAnalyzer.cc
View file

@ -282,3 +282,18 @@ void IPBasedAnalyzer::DumpPortDebug()
DBG_LOG(DBG_ANALYZER, " %d/%s: %s", mapping.first, transport_proto_string(transport), s.c_str());
}
}
TableValPtr IPBasedAnalyzer::ignore_checksums_nets_table = nullptr;
void IPBasedAnalyzer::SetIgnoreChecksumsNets(TableValPtr t)
{
IPBasedAnalyzer::ignore_checksums_nets_table = t;
}
TableValPtr IPBasedAnalyzer::GetIgnoreChecksumsNets()
{
if ( ! IPBasedAnalyzer::ignore_checksums_nets_table )
IPBasedAnalyzer::ignore_checksums_nets_table = zeek::id::find_val<TableVal>("ignore_checksums_nets");
return IPBasedAnalyzer::ignore_checksums_nets_table;
}