C++ definition

This class represents an Ethernet FCS as defined in the section 3.2.9 Frame Check Sequence (FCS) field of the IEEE Std 802.3-2018, IEEE Standard for Ethernet.

0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +---------------------------------------------------------------+ | FCS | +---------------------------------------------------------------+

Extends

Fields

Source code

//
// This class represents an Ethernet FCS as defined in the section 3.2.9 Frame
// Check Sequence (FCS) field of the IEEE Std 802.3-2018, IEEE Standard for
// Ethernet.
//
//  0                   1                   2                   3
//  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
// +---------------------------------------------------------------+
// |                              FCS                              |
// +---------------------------------------------------------------+
//
class EthernetFcs extends FieldsChunk
{
    chunkLength = B(4);
    uint32_t fcs; // actual value may be omitted depending on the selected fcsMode

    ChecksumMode fcsMode = FCS_MODE_UNDEFINED; // meta information, not represented directly in the frame; NOTE: should be FcsMode, but OMMeT++ bug #1351 prevents that (fixed in OMNeT++ 6.2)
}

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