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Set original/outer packet flags to reflect inner packet results

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Propagate inner packet flags such as 'processed', 'dump_packet', 'dump_size'
to outer packet for packets involving tunneled data.
This commit is contained in:
mnhsrj 2025-02-12 09:43:44 -05:00
parent b7b31ebce5
commit 0257b6cd32
No known key found for this signature in database
GPG key ID: 4FFE3815FE3CC260
3 changed files with 15 additions and 4 deletions
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1
src/iosource/Packet.cc
View file

@ -46,6 +46,7 @@ void Packet::Init(int arg_link_type, pkt_timeval* arg_ts, uint32_t arg_caplen, u
data = arg_data;
dump_packet = false;
dump_size = 0;
time = ts.tv_sec + double(ts.tv_usec) / 1e6;
eth_type = 0;

14
src/packet_analysis/protocol/iptunnel/IPTunnel.cc
View file

@ -78,7 +78,7 @@ bool IPTunnelAnalyzer::AnalyzePacket(size_t len, const uint8_t* data, Packet* pa
/**
* Handles a packet that contains an IP header directly after the tunnel header.
*/
bool IPTunnelAnalyzer::ProcessEncapsulatedPacket(double t, const Packet* pkt, const std::shared_ptr<IP_Hdr>& inner,
bool IPTunnelAnalyzer::ProcessEncapsulatedPacket(double t, Packet* pkt, const std::shared_ptr<IP_Hdr>& inner,
std::shared_ptr<EncapsulationStack> prev,
const EncapsulatingConn& ec) {
uint32_t caplen, len;
@ -113,13 +113,18 @@ bool IPTunnelAnalyzer::ProcessEncapsulatedPacket(double t, const Packet* pkt, co
// Forward the packet back to the IP analyzer.
bool return_val = ForwardPacket(len, data, &p);
// Propagate the flags from fake inner packet to outer packet
pkt->processed = p.processed;
pkt->dump_packet = p.dump_packet;
pkt->dump_size = ( p.dump_size > 0 ) ? static_cast<int>(data - pkt->data) + p.dump_size : p.dump_size;
return return_val;
}
/**
* Handles a packet that contains a physical-layer header after the tunnel header.
*/
bool IPTunnelAnalyzer::ProcessEncapsulatedPacket(double t, const Packet* pkt, uint32_t caplen, uint32_t len,
bool IPTunnelAnalyzer::ProcessEncapsulatedPacket(double t, Packet* pkt, uint32_t caplen, uint32_t len,
const u_char* data, int link_type,
std::shared_ptr<EncapsulationStack> prev,
const EncapsulatingConn& ec) {
@ -145,6 +150,11 @@ bool IPTunnelAnalyzer::ProcessEncapsulatedPacket(double t, const Packet* pkt, ui
// to the packet manager.
bool return_val = packet_mgr->ProcessInnerPacket(&p);
// Propagate the flags from fake inner packet to outer packet
pkt->processed = p.processed;
pkt->dump_packet = p.dump_packet;
pkt->dump_size = ( p.dump_size > 0 ) ? static_cast<int>(data - pkt->data) + p.dump_size : p.dump_size;
return return_val;
}

4
src/packet_analysis/protocol/iptunnel/IPTunnel.h
View file

@ -37,7 +37,7 @@ public:
* the most-recently found depth of encapsulation.
* @param ec The most-recently found depth of encapsulation.
*/
bool ProcessEncapsulatedPacket(double t, const Packet* pkt, const std::shared_ptr<IP_Hdr>& inner,
bool ProcessEncapsulatedPacket(double t, Packet* pkt, const std::shared_ptr<IP_Hdr>& inner,
std::shared_ptr<EncapsulationStack> prev, const EncapsulatingConn& ec);
/**
@ -56,7 +56,7 @@ public:
* including the most-recently found depth of encapsulation.
* @param ec The most-recently found depth of encapsulation.
*/
bool ProcessEncapsulatedPacket(double t, const Packet* pkt, uint32_t caplen, uint32_t len, const u_char* data,
bool ProcessEncapsulatedPacket(double t, Packet* pkt, uint32_t caplen, uint32_t len, const u_char* data,
int link_type, std::shared_ptr<EncapsulationStack> prev,
const EncapsulatingConn& ec);