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/* packet-gtp.h
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifndef __PACKET_GTP_H
#define __PACKET_GTP_H
/*structure used to track responses to requests using sequence number*/
typedef struct gtp_msg_hash_entry {
bool is_request; /*true/false*/
uint32_t req_frame; /*frame with request */
nstime_t req_time; /*req time */
uint32_t rep_frame; /*frame with reply */
int seq_nr; /*sequence number*/
unsigned msgtype; /*messagetype*/
} gtp_msg_hash_t;
typedef struct _gtp_hdr {
uint8_t flags; /* GTP header flags */
uint8_t message; /* Message type */
uint16_t length; /* Length of header */
int64_t teid; /* Tunnel End-point ID */
} gtp_hdr_t;
/* definitions of GTP messages */
#define GTP_MSG_UNKNOWN 0x00
#define GTP_MSG_ECHO_REQ 0x01
#define GTP_MSG_ECHO_RESP 0x02
#define GTP_MSG_VER_NOT_SUPP 0x03
#define GTP_MSG_NODE_ALIVE_REQ 0x04
#define GTP_MSG_NODE_ALIVE_RESP 0x05
#define GTP_MSG_REDIR_REQ 0x06
#define GTP_MSG_REDIR_RESP 0x07
/*
* 8-15 For future use. Shall not be sent. If received,
* shall be treated as an Unknown message.
*/
#define GTP_MSG_CREATE_PDP_REQ 0x10
#define GTP_MSG_CREATE_PDP_RESP 0x11
#define GTP_MSG_UPDATE_PDP_REQ 0x12
#define GTP_MSG_UPDATE_PDP_RESP 0x13
#define GTP_MSG_DELETE_PDP_REQ 0x14
#define GTP_MSG_DELETE_PDP_RESP 0x15
#define GTP_MSG_INIT_PDP_CONTEXT_ACT_REQ 0x16 /* 2G */
#define GTP_MSG_INIT_PDP_CONTEXT_ACT_RESP 0x17 /* 2G */
/*
* 24-25 For future use. Shall not be sent. If received,
* shall be treated as an Unknown message.
*/
#define GTP_MSG_DELETE_AA_PDP_REQ 0x18 /* 2G */
#define GTP_MSG_DELETE_AA_PDP_RESP 0x19 /* 2G */
#define GTP_MSG_ERR_IND 0x1A
#define GTP_MSG_PDU_NOTIFY_REQ 0x1B
#define GTP_MSG_PDU_NOTIFY_RESP 0x1C
#define GTP_MSG_PDU_NOTIFY_REJ_REQ 0x1D
#define GTP_MSG_PDU_NOTIFY_REJ_RESP 0x1E
#define GTP_MSG_SUPP_EXT_HDR 0x1F
#define GTP_MSG_SEND_ROUT_INFO_REQ 0x20
#define GTP_MSG_SEND_ROUT_INFO_RESP 0x21
#define GTP_MSG_FAIL_REP_REQ 0x22
#define GTP_MSG_FAIL_REP_RESP 0x23
#define GTP_MSG_MS_PRESENT_REQ 0x24
#define GTP_MSG_MS_PRESENT_RESP 0x25
/*
* 38-47 For future use. Shall not be sent. If received,
* shall be treated as an Unknown message.
*/
#define GTP_MSG_IDENT_REQ 0x30
#define GTP_MSG_IDENT_RESP 0x31
#define GTP_MSG_SGSN_CNTXT_REQ 0x32
#define GTP_MSG_SGSN_CNTXT_RESP 0x33
#define GTP_MSG_SGSN_CNTXT_ACK 0x34
#define GTP_MSG_FORW_RELOC_REQ 0x35
#define GTP_MSG_FORW_RELOC_RESP 0x36
#define GTP_MSG_FORW_RELOC_COMP 0x37
#define GTP_MSG_RELOC_CANCEL_REQ 0x38
#define GTP_MSG_RELOC_CANCEL_RESP 0x39
#define GTP_MSG_FORW_SRNS_CNTXT 0x3A
#define GTP_MSG_FORW_RELOC_ACK 0x3B
#define GTP_MSG_FORW_SRNS_CNTXT_ACK 0x3C
#define GTP_MSG_UE_REG_QUERY_REQ 0x3D
#define GTP_MSG_UE_REG_QUERY_RESP 0x3E
/*
* 63-69 For future use. Shall not be sent. If received,
* shall be treated as an Unknown message.
*/
#define GTP_MSG_RAN_INFO_RELAY 70
/*
* 71-95 For future use. Shall not be sent. If received,
* shall be treated as an Unknown message.
*/
#define GTP_MBMS_NOTIFY_REQ 96
#define GTP_MBMS_NOTIFY_RES 97
#define GTP_MBMS_NOTIFY_REJ_REQ 98
#define GTP_MBMS_NOTIFY_REJ_RES 99
#define GTP_CREATE_MBMS_CNTXT_REQ 100
#define GTP_CREATE_MBMS_CNTXT_RES 101
#define GTP_UPD_MBMS_CNTXT_REQ 102
#define GTP_UPD_MBMS_CNTXT_RES 103
#define GTP_DEL_MBMS_CNTXT_REQ 104
#define GTP_DEL_MBMS_CNTXT_RES 105
/*
* 106 - 111 For future use. Shall not be sent. If received,
* shall be treated as an Unknown message.
*/
#define GTP_MBMS_REG_REQ 112
#define GTP_MBMS_REG_RES 113
#define GTP_MBMS_DE_REG_REQ 114
#define GTP_MBMS_DE_REG_RES 115
#define GTP_MBMS_SES_START_REQ 116
#define GTP_MBMS_SES_START_RES 117
#define GTP_MBMS_SES_STOP_REQ 118
#define GTP_MBMS_SES_STOP_RES 119
#define GTP_MBMS_SES_UPD_REQ 120
#define GTP_MBMS_SES_UPD_RES 121
/* 122-127 For future use. Shall not be sent.
* If received, shall be treated as an Unknown message.
*/
#define GTP_MS_INFO_CNG_NOT_REQ 128
#define GTP_MS_INFO_CNG_NOT_RES 129
/* 130-239 For future use. Shall not be sent.
* If received, shall be treated as an Unknown message.
*/
#define GTP_MSG_DATA_TRANSF_REQ 0xF0
#define GTP_MSG_DATA_TRANSF_RESP 0xF1
/* 242-253 For future use. Shall not be sent.
* If received, shall be treated as an Unknown message.
*/
#define GTP_MSG_END_MARKER 0xFE /* 254 */
#define GTP_MSG_TPDU 0xFF
extern value_string_ext cause_type_ext;
/** GTP header extension info
* This structure is used to transfer infotmation to users of the "gtp.hdr_ext" dissector table
*/
typedef struct gtp_hdr_ext_info {
proto_item* hdr_ext_item; /* The item created when adding the type of header to the tree,
* used to put the name in the tree
*/
} gtp_hdr_ext_info_t;
/* Data structures to keep track of sessions */
extern uint32_t gtp_session_count;
extern bool g_gtp_session;
typedef struct session_args {
wmem_list_t *teid_list;
wmem_list_t *ip_list;
uint32_t last_teid;
address last_ip;
uint8_t last_cause;
} session_args_t;
/* Relation between frame -> session */
extern wmem_map_t* session_table;
/* Relation between <teid,ip> -> frame */
extern wmem_map_t* frame_map;
uint32_t get_frame(address ip, uint32_t teid, uint32_t *frame);
void remove_frame_info(uint32_t f);
void add_gtp_session(uint32_t frame, uint32_t session);
bool teid_exists(uint32_t teid, wmem_list_t *teid_list);
bool ip_exists(address ip, wmem_list_t *ip_list);
void fill_map(wmem_list_t *teid_list, wmem_list_t *ip_list, uint32_t frame);
bool is_cause_accepted(uint8_t cause, uint32_t version);
int decode_qos_umts(tvbuff_t * tvb, int offset, packet_info * pinfo, proto_tree * tree, const char * qos_str, uint8_t type);
void dissect_gtp_uli(tvbuff_t * tvb, int offset, packet_info * pinfo, proto_tree * tree, session_args_t * args _U_);
#endif /* __PACKET_GTP_H*/
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