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Initial implementation of Lower-Level analyzers

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Peter Oettig 2019-05-09 17:49:52 +02:00 • committed by Tim Wojtulewicz
parent f744d4c070
commit b2e6c9ac9a
146 changed files with 3967 additions and 613 deletions
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34
src/llanalyzer/protocol/linux_sll/LinuxSLL.cc Normal file
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// See the file "COPYING" in the main distribution directory for copyright.
#include "LinuxSLL.h"
using namespace zeek::llanalyzer::LinuxSLL;
LinuxSLLAnalyzer::LinuxSLLAnalyzer()
: zeek::llanalyzer::Analyzer("LinuxSLL")
{
}
std::tuple<zeek::llanalyzer::AnalyzerResult, zeek::llanalyzer::identifier_t> LinuxSLLAnalyzer::Analyze(Packet* packet)
{
auto& pdata = packet->cur_pos;
if ( pdata + sizeof(SLLHeader) >= packet->GetEndOfData() )
{
packet->Weird("truncated_Linux_SLL_header");
return { AnalyzerResult::Failed, 0 };
}
//TODO: Handle different ARPHRD_types
auto hdr = (const SLLHeader*)pdata;
identifier_t protocol = ntohs(hdr->protocol_type);
packet->l2_src = (u_char*) &(hdr->addr);
// SLL doesn't include a destination address in the header, but not setting l2_dst to something
// here will cause crashes elsewhere.
packet->l2_dst = Packet::L2_EMPTY_ADDR;
pdata += sizeof(SLLHeader);
return { AnalyzerResult::Continue, protocol };
}