Namespace inet

Ieee8022LlcHeader

class

This chunk represents an IEEE 802.2 LLC header as defined by the ANSI/IEEE Std 802.2, 1998, IEEE Standard for Information technology, Telecommunications and information exchange between systems, Local and metropolitan area networks.

0 1 2 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 +---------------+---------------+---------------+ | DSAP | SSAP | CONTROL | +---------------+---------------+---------------+

Extends

Name	Type	Description
FieldsChunk	(unknown -- not in documented files)

Fields

Name	Type	Description
chunkLength
dsap	short	1 byte
ssap	short	1 byte
control	int	1 or 2 byte, control = byte[0]+256*byte[1], two bytes, when (byte[0] & 3) != 3

Packet operations (observed)

action	module
insertAtFront	Ieee80211LlcLpd, Ieee8022Llc
peekAtFront	Ieee80211Portal
popAtFront	Ieee80211LlcLpd, Ieee8022Llc

Source code

//
// This chunk represents an IEEE 802.2 LLC header as defined by the ANSI/IEEE
// Std 802.2, 1998, IEEE Standard for Information technology, Telecommunications
// and information exchange between systems, Local and metropolitan area networks.
//
//  0                   1                   2
//  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3
// +---------------+---------------+---------------+
// |      DSAP     |      SSAP     |    CONTROL    |
// +---------------+---------------+---------------+
//
class Ieee8022LlcHeader extends FieldsChunk
{
    chunkLength = B(3);
    short dsap = -1;    // 1 byte
    short ssap = -1;    // 1 byte
    int control = -1;    // 1 or 2 byte, control = byte[0]+256*byte[1], two bytes, when (byte[0] & 3) != 3
}

File: src/inet/linklayer/ieee8022/Ieee8022LlcHeader.msg