atm_phdr Struct Reference

Pseudo-header for ATM capture files carrying cell, circuit, and AAL-layer metadata. More...

#include <wtap.h>

Public Attributes
uint32_t	flags
uint8_t	aal
uint8_t	type
uint8_t	subtype
uint16_t	vpi
uint16_t	vci
uint8_t	aal2_cid
uint16_t	channel
uint16_t	cells
uint16_t	aal5t_u2u
uint16_t	aal5t_len
uint32_t	aal5t_chksum

Detailed Description

Pseudo-header for ATM capture files carrying cell, circuit, and AAL-layer metadata.

Member Data Documentation

aal

uint8_t atm_phdr::aal

ATM Adaptation Layer type in use (e.g. AAL1, AAL2, AAL5).

aal2_cid

uint8_t atm_phdr::aal2_cid

AAL2 channel identifier; only meaningful when aal is AAL2.

aal5t_chksum

uint32_t atm_phdr::aal5t_chksum

CRC-32 checksum from the AAL5 CPCS trailer covering the AAL5 packet.

aal5t_len

uint16_t atm_phdr::aal5t_len

Length in bytes of the AAL5 CPCS-PDU payload.

aal5t_u2u

uint16_t atm_phdr::aal5t_u2u

AAL5 User-to-User (UU) indicator field from the AAL5 CPCS trailer.

cells

uint16_t atm_phdr::cells

Number of ATM cells comprising this packet.

channel

uint16_t atm_phdr::channel

Link direction: 0 = DTE→DCE, 1 = DCE→DTE.

flags

uint32_t atm_phdr::flags

Bitmask of status flags describing capture conditions for this ATM packet.

subtype

uint8_t atm_phdr::subtype

Traffic subtype providing further classification within type.

type

uint8_t atm_phdr::type

Traffic type classification for this virtual circuit.

vci

uint16_t atm_phdr::vci

Virtual Circuit Identifier of the ATM virtual circuit.

vpi

uint16_t atm_phdr::vpi

Virtual Path Identifier of the ATM virtual circuit.

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The documentation for this struct was generated from the following file:

• /builds/wireshark/wireshark/wiretap/wtap.h