Message EtherFrame

File: NetworkInterfaces/Ethernet/EtherFrame.msg

Common base class for classes representing Ethernet II and 802.3 frame types, containing their common header fields.

This class should never be instantiated by the models, only specific subclasses: EthernetIIFrame, EtherFrameWithLLC and EtherFrameWithSNAP.

Source and destination MAC address are stored in data members. Other fields include:

• preamble: not stored (only contributes length)
• length: stored in cMessage::length(), not stored explicitly
• payload: stored a encapsulated packet (cMessage::encapsulate())
• crc: represented by cMessage::hasBitError()

Inheritance diagram:

The following diagram shows part of the inheritance hierarchy. Unresolved types are missing from the diagram. Click here to see the full picture.

Known subclasses:

Fields:

Source code:

message EtherFrame
{
    fields:
        MACAddress dest;
        MACAddress src;
        //MessageId id; -- uncomment for tracing frames
};