inet::EthernetMacProtocolDissector Class Reference

#include <EthernetMacProtocolDissector.h>

Inheritance diagram for inet::EthernetMacProtocolDissector:

Public Member Functions
virtual void	dissect (Packet *packet, const Protocol *protocol, ICallback &callback) const override
	Dissects the packet according to the protocol implemented by this ProtocolDissector. More...

Member Function Documentation

dissect()

void inet::EthernetMacProtocolDissector::dissect ( Packet *  packet, const Protocol *  protocol, ICallback &  callback  ) const

overridevirtual

Dissects the packet according to the protocol implemented by this ProtocolDissector.

Implements inet::ProtocolDissector.

{
    const auto& macHeader = packet->popAtFront<EthernetMacHeader>();
    callback.startProtocolDataUnit(&Protocol::ethernetMac);
    callback.visitChunk(macHeader, &Protocol::ethernetMac);
    const auto& fcs = packet->popAtBack<EthernetFcs>(ETHER_FCS_BYTES);
    int typeOrLength = macHeader->getTypeOrLength();
    if (isEth2Type(typeOrLength)) {
        auto payloadProtocol = ProtocolGroup::ethertype.findProtocol(typeOrLength);
        callback.dissectPacket(packet, payloadProtocol);
    }
    else {
        // LLC header
        auto ethEndOffset = packet->getFrontOffset() + B(typeOrLength);
        auto trailerOffset = packet->getBackOffset();
        packet->setBackOffset(ethEndOffset);
        callback.dissectPacket(packet, &Protocol::ieee8022llc);
        packet->setBackOffset(trailerOffset);
    }
    auto paddingLength = packet->getDataLength();
    if (paddingLength > b(0)) {
        const auto& padding = packet->popAtFront(paddingLength);
        callback.visitChunk(padding, &Protocol::ethernetMac);
    }
    callback.visitChunk(fcs, &Protocol::ethernetMac);
    callback.endProtocolDataUnit(&Protocol::ethernetMac);
}

---

The documentation for this class was generated from the following files:

• EthernetMacProtocolDissector.h
• EthernetMacProtocolDissector.cc