pcpp::gtpv1_header Struct Reference

#include <GtpLayer.h>

Public Attributes
uint8_t	npduNumberFlag:1
uint8_t	sequenceNumberFlag:1
uint8_t	extensionHeaderFlag:1
uint8_t	reserved:1
uint8_t	protocolType:1
uint8_t	version:3
uint8_t	messageType
uint16_t	messageLength
uint32_t	teid

Detailed Description

GTP v1 common message header

Member Data Documentation

extensionHeaderFlag

uint8_t pcpp::gtpv1_header::extensionHeaderFlag

A 1-bit value that states whether there is an extension header optional field

messageLength

uint16_t pcpp::gtpv1_header::messageLength

A 16-bit field that indicates the length of the payload in bytes (rest of the packet following the mandatory 8-byte GTP header). Includes the optional fields

messageType

uint8_t pcpp::gtpv1_header::messageType

An 8-bit field that indicates the type of GTP message

npduNumberFlag

uint8_t pcpp::gtpv1_header::npduNumberFlag

A 1-bit value that states whether there is a N-PDU number optional field

protocolType

uint8_t pcpp::gtpv1_header::protocolType

A 1-bit value that differentiates GTP (value 1) from GTP' (value 0)

reserved

uint8_t pcpp::gtpv1_header::reserved

Reserved bit

sequenceNumberFlag

uint8_t pcpp::gtpv1_header::sequenceNumberFlag

A 1-bit value that states whether there is a Sequence Number optional field

teid

uint32_t pcpp::gtpv1_header::teid

Tunnel endpoint identifier - A 32-bit(4-octet) field used to multiplex different connections in the same GTP tunnel

version

uint8_t pcpp::gtpv1_header::version

GTP version