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wireshark/epan/dissectors/packet-sgsap.c

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/* packet-sgsap.c
* Routines for SGs Application Part (SGsAP) protocol dissection
*
* Copyright 2010 - 2017, Anders Broman <anders.broman@ericsson.com>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*
* References: 3GPP TS 29.118 V10.2.0 (2010-12)
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/prefs.h>
#include <epan/expert.h>
#include <epan/exceptions.h>
#include <epan/show_exception.h>
#include "packet-gsm_a_common.h"
#include "packet-e212.h"
#define PNAME "SGs Application Part (SGsAP)"
#define PSNAME "SGSAP"
#define PFNAME "sgsap"
void proto_register_sgsap(void);
void proto_reg_handoff_sgsap(void);
/* Global variables */
static dissector_handle_t gsm_a_dtap_handle;
/* The registered SCTP port number for SGsAP is 29118.
* The payload protocol identifier to be used for SGsAP is 0.
*/
#define SGSAP_SCTP_PORT_RANGE "29118"
/* Initialize the protocol and registered fields */
static int proto_sgsap = -1;
static int hf_sgsap_msg_type = -1;
int hf_sgsap_elem_id = -1;
static int hf_sgsap_eps_location_update_type = -1;
static int hf_sgsap_service_indicator_value = -1;
static int hf_sgsap_sgs_cause = -1;
static int hf_sgsap_ue_emm_mode = -1;
static int hf_sgsap_eci = -1;
static int hf_sgsap_cn_id = -1;
static int hf_sgsap_imsi_det_eps = -1;
static int hf_sgsap_imsi_det_non_eps = -1;
static int hf_sgsap_lcs_indic = -1;
static int hf_sgsap_mme_name = -1;
static int hf_sgsap_vlr_name = -1;
static int hf_sgsap_imeisv = -1;
static int hf_sgsap_unknown_msg = -1;
static int hf_sgsap_message_elements = -1;
static int hf_sgsap_csri = -1;
static int hf_sgsap_sel_cs_dmn_op = -1;
static int ett_sgsap = -1;
static int ett_sgsap_sel_cs_dmn_op = -1;
static expert_field ei_sgsap_extraneous_data = EI_INIT;
static expert_field ei_sgsap_missing_mandatory_element = EI_INIT;
static dissector_handle_t sgsap_handle;
static void get_sgsap_msg_params(guint8 oct, const gchar **msg_str, int *ett_tree, int *hf_idx, msg_fcn *msg_fcn_p);
/*
* 9.4 Information elements
*/
/*
* 9.4.1 CLI
*/
/*
* Octets 3 to 14 contain the value part of the Calling party BCD number information element
* defined in subclause 10.5.4.9 of 3GPP TS 24.008 [8] (octets 3 to 14, i.e. not including
* 3GPP TS 24.008 IEI and 3GPP TS 24.008 length indicator)
* ( packet-gsm_a_dtap.c )
*/
/*
* 9.4.2 EPS location update type
*/
/* EPS location update type value (octet 3) */
static const value_string sgsap_eps_location_update_type_values[] = {
{ 0x00, "Shall not be sent in this version of the protocol" },
{ 0x01, "IMSI attach" },
{ 0x02, "Normal location update" },
{ 0, NULL }
};
static guint16
de_sgsap_eps_loc_upd_type(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len _U_, gchar *add_string _U_, int string_len _U_)
{
guint32 curr_offset;
guint8 oct;
curr_offset = offset;
/* Octet 3 EPS location update type value */
proto_tree_add_item(tree, hf_sgsap_eps_location_update_type, tvb, offset, 1, ENC_BIG_ENDIAN);
if (add_string) {
oct = tvb_get_guint8(tvb, curr_offset);
snprintf(add_string, string_len, " - %s", val_to_str_const(oct, sgsap_eps_location_update_type_values, "Reserved"));
}
curr_offset++;
return(curr_offset - offset);
}
/*
* 9.4.3 Erroneous message
*
* See subclause 18.4.5 in 3GPP TS 29.018 [16].
*/
static guint16
de_sgsap_err_msg(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo, guint32 offset, guint len, gchar *add_string , int string_len)
{
const gchar *msg_str;
gint ett_tree;
int hf_idx;
void(*msg_fcn_p)(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo, guint32 offset, guint len);
guint8 oct;
/* 18.4.5 Erroneous message
* The Erroneous message IE is a TLV IE that encapsulates the message in error.
* Octet 3 - Octet n
* Erroneous message including the message type.
*/
/* Messge type IE*/
oct = tvb_get_guint8(tvb, offset);
msg_fcn_p = NULL;
ett_tree = -1;
hf_idx = -1;
msg_str = NULL;
proto_tree_add_item(tree, hf_sgsap_msg_type, tvb, offset, 1, ENC_BIG_ENDIAN);
get_sgsap_msg_params(oct, &msg_str, &ett_tree, &hf_idx, &msg_fcn_p);
if (msg_str) {
if (add_string)
snprintf(add_string, string_len, " - %s", msg_str);
}
if (msg_fcn_p){
volatile guint32 curr_offset = offset + 1;
TRY {
/*let's try to decode erroneous message and catch exceptions as it could be malformed */
(*msg_fcn_p)(tvb, tree, pinfo, curr_offset, len - 1);
} CATCH_BOUNDS_ERRORS {
show_exception(tvb, pinfo, tree, EXCEPT_CODE, GET_MESSAGE);
} ENDTRY
}
return(len);
}
/*
* 9.4.3a E-UTRAN Cell Global Identity
*
* The coding of the E-UTRAN Cell Global Identity value is according to ECGI field information element
* as specified in subclause 8.21.5 of 3GPP TS 29.274 [17A] (GTPv2-C)
*/
guint16
de_sgsap_ecgi(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo, guint32 offset, guint len _U_, gchar *add_string _U_, int string_len _U_)
{
guint32 curr_offset;
curr_offset = offset;
dissect_e212_mcc_mnc(tvb, pinfo, tree, offset, E212_ECGI, TRUE);
curr_offset += 3;
proto_tree_add_item(tree, hf_sgsap_eci, tvb, curr_offset, 4, ENC_BIG_ENDIAN);
curr_offset += 4;
return(curr_offset-offset);
}
/*
* 9.4.4 Global CN-Id
*
* See subclause 18.4.27 in 3GPP TS 29.018 [16].
* 18.4.27 Global CN-Id
* The Global CN-Id consists of a PLMN-Id and a CN-Id, see 3GPP TS 23.003. The PLMN-Id consists of MCC and MNC
* coded according to Location Area Identification in 3GPP TS 24.008. The CN-Id is an integer defined by O&M. The
* least significant bit of the CN-Id field is bit 1 of octet 7 and the most significant bit is bit 8 of octet 6. If the CN-Id does
* not fill the field reserved for it, the rest of the bits are set to '0'.
*/
static guint16
de_sgsap_g_cn_id(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo, guint32 offset, guint len _U_, gchar *add_string _U_, int string_len _U_)
{
guint32 curr_offset;
curr_offset = offset;
dissect_e212_mcc_mnc(tvb, pinfo, tree, offset, E212_NONE, TRUE);
curr_offset += 3;
proto_tree_add_item(tree, hf_sgsap_cn_id, tvb, curr_offset, 2, ENC_BIG_ENDIAN);
curr_offset += 2;
return(curr_offset-offset);
}
/*
* 9.4.5 IMEISV
* See subclause 18.4.9 in 3GPP TS 29.018 [16].
* The IMEISV is coded as a sequence of BCD digits, compressed two into each octet.
* The IMEISV consists of 16 digits
* (see 3GPP TS 23.003).
*/
static guint16
de_sgsap_imeisv(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len _U_, gchar *add_string _U_, int string_len _U_)
{
char *imeisv_str;
guint32 curr_offset;
curr_offset = offset;
proto_tree_add_item_ret_display_string(tree, hf_sgsap_imeisv, tvb, curr_offset, len, ENC_BCD_DIGITS_0_9, pinfo->pool, &imeisv_str);
if (add_string) {
/* (len<<2)+4 = the maximum number of bytes to produce (including the terminating nul character). */
snprintf(add_string, (len<<2)+4, " - %s", imeisv_str);
}
return(len);
}
/*
* 9.4.6 IMSI
* See subclause 18.4.10 in 3GPP TS 29.018 [16].
*/
/* The IMSI is coded as a sequence of BCD digits, compressed two into each octet.
* This is a variable length element, and includes a length indicator.
* The IMSI is defined in 3GPP TS 23.003. It shall not exceed 15 digits (see 3GPP TS 23.003).
*/
/*
* 9.4.7 IMSI detach from EPS service type
*/
/* IMSI detach from EPS service type value (octet 3) */
static const value_string sgsap_imsi_det_from_eps_serv_type_values[] = {
{ 0x00, "Interpreted as reserved in this version of the protocol" },
{ 0x01, "Network initiated IMSI detach from EPS services" },
{ 0x02, "UE initiated IMSI detach from EPS services" },
{ 0x03, "EPS services not allowed" },
{ 0, NULL }
};
static guint16
de_sgsap_imsi_det_eps(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len _U_, gchar *add_string _U_, int string_len _U_)
{
guint32 curr_offset;
curr_offset = offset;
proto_tree_add_item(tree, hf_sgsap_imsi_det_eps, tvb, curr_offset, 1, ENC_BIG_ENDIAN);
curr_offset += 1;
return(curr_offset-offset);
}
/*
* 9.4.8 IMSI detach from non-EPS service type
*/
/* IMSI detach from non-EPS service type value (octet 3)*/
static const value_string sgsap_imsi_det_from_non_eps_serv_type_values[] = {
{ 0x00, "Interpreted as reserved in this version of the protocol" },
{ 0x01, "Explicit UE initiated IMSI detach from non-EPS services" },
{ 0x02, "Combined UE initiated IMSI detach from EPS and non-EPS services" },
{ 0x03, "Implicit network initiated IMSI detach from non-EPS services" },
{ 0, NULL }
};
static guint16
de_sgsap_imsi_det_non_eps(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len _U_, gchar *add_string _U_, int string_len _U_)
{
guint32 curr_offset;
curr_offset = offset;
proto_tree_add_item(tree, hf_sgsap_imsi_det_non_eps, tvb, curr_offset, 1, ENC_BIG_ENDIAN);
curr_offset += 1;
return(curr_offset-offset);
}
/*
* 9.4.9 LCS client identity
* The coding of the LCS client identity value is according to LCS-ClientID
* as specified in subclause 17.7.13 of 3GPP TS 29.002 [15]
* (packet-nas_eps.c)
*/
/*
* 9.4.10 LCS indicator
*/
static const value_string sgsap_lcs_indic_values[] = {
{ 0x00, "Normal, unspecified in this version of the protocol" },
{ 0x01, "MT-LR" },
{ 0, NULL }
};
static guint16
de_sgsap_lcs_indic(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len _U_, gchar *add_string _U_, int string_len _U_)
{
guint32 curr_offset;
curr_offset = offset;
proto_tree_add_item(tree, hf_sgsap_lcs_indic, tvb, curr_offset, 1, ENC_BIG_ENDIAN);
curr_offset += 1;
return(curr_offset-offset);
}
/*
* 9.4.11 Location area identifier
*
* Octets 3 to 7 contain the value part of the Location area identification information element
* defined in 3GPP TS 24.008 [8] (starting with octet 2, i.e. not including 3GPP TS 24.008 IEI)
*(packet-gsm_a_common.c)
*/
/*
* 9.4.12 MM information
* For the coding see subclause 18.4.16 in 3GPP TS 29.018 [16].
* User information: This field is composed of one or more of the
* information elements of the MM information message as defined in
* 3GPP TS 24.008, excluding the Protocol discriminator, Skip
* indicator and Message type. This field includes the IEI and length
* indicatior of the other information elements.
*/
static guint16
de_sgsap_mm_info(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len, gchar *add_string _U_, int string_len _U_)
{
guint32 curr_offset;
curr_offset = offset;
dtap_mm_mm_info(tvb, tree, pinfo, curr_offset, len);
return(len);
}
/*
* 9.4.13 MME name
*/
static guint16
de_sgsap_mme_name(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len _U_, gchar *add_string _U_, int string_len _U_)
{
guint name_len;
guint8 *fqdn = NULL;
/* The MME name information element specifies the MME name and is coded as shown in figure 9.4.13.1. Octets 3
* through n contain the name in the form of a fully qualified domain name (FQDN) as specified in 3GPP TS 23.003 [3].
* The value part of the MME name information element (not including IEI and length indicator) shall have a length of 55
* octets.
*/
if (len > 0) {
name_len = tvb_get_guint8(tvb, offset);
if (name_len < 0x20) {
fqdn = tvb_get_string_enc(pinfo->pool, tvb, offset, len, ENC_APN_STR);
} else{
fqdn = tvb_get_string_enc(pinfo->pool, tvb, offset, len, ENC_ASCII);
}
proto_tree_add_string(tree, hf_sgsap_mme_name, tvb, offset, len, fqdn);
if (add_string)
snprintf(add_string, string_len, " - %s", fqdn);
}
return(len);
}
/*
* 9.4.14 Mobile identity
* See subclause 18.4.17 in 3GPP TS 29.018 [16].
* (packet-gsm_a_common.c)
*/
/*
* 9.4.14a Mobile Station Classmark 2
* With the exception of the IEI, the contents are specified in subclause 10.5.1.6 in 3GPP TS 24.008 [8].
* (packet-gsm_a_common.c)
*/
/*
* 9.4.15 NAS message container
* Octets 3 to 253 contain the SMS message (i.e. CP DATA, CP ACK or CP ERROR)
* as defined in subclause 7.2 of 3GPP TS 24.011 [10]
*/
static guint16
de_sgsap_nas_msg_container(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo, guint32 offset, guint len, gchar *add_string _U_, int string_len _U_)
{
tvbuff_t *new_tvb;
guint32 curr_offset;
curr_offset = offset;
/* Octets 3 to 253 contain the SMS message (i.e. CP DATA, CP ACK or CP ERROR)
* as defined in subclause 7.2 of 3GPP TS 24.011 [10]
*/
new_tvb = tvb_new_subset_length(tvb, curr_offset, len);
if (gsm_a_dtap_handle) {
call_dissector(gsm_a_dtap_handle, new_tvb, pinfo, tree);
}
return(len);
}
/*
* 9.4.16 Reject cause
* See subclause 18.4.21 in 3GPP TS 29.018 [16].
* The rest of the information element is coded as the value part of
* the reject cause IE defined in 3GPP TS 24.008, not including
* 3GPP TS 24.008 IEI.
* (packet-gsm_a_dtap.c)
*/
/*
* 9.4.17 Service indicator
*/
/* Octet 3 Service indicator value */
static const value_string sgsap_service_indicator_values[] = {
{ 0x00, "Shall not be sent in this version of the protocol" },
{ 0x01, "CS call indicator" },
{ 0x02, "SMS indicator" },
{ 0, NULL }
};
static guint16
de_sgsap_serv_indic(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len _U_, gchar *add_string _U_, int string_len _U_)
{
guint32 curr_offset;
guint8 oct;
curr_offset = offset;
/* Octet 3 Service indicator value */
proto_tree_add_item(tree, hf_sgsap_service_indicator_value, tvb, offset, 1, ENC_BIG_ENDIAN);
if (add_string) {
oct = tvb_get_guint8(tvb, curr_offset);
snprintf(add_string, string_len, " - %s", val_to_str_const(oct, sgsap_service_indicator_values, "Reserved"));
}
curr_offset++;
return(curr_offset - offset);
}
/*
* 9.4.18 SGs cause
*/
/* SGs cause value (octet 3) */
static const value_string sgsap_sgs_cause_values[] = {
{ 0x00, "Normal, unspecified in this version of the protocol" },
{ 0x01, "IMSI detached for EPS services" },
{ 0x02, "IMSI detached for EPS and non-EPS services" },
{ 0x03, "IMSI unknown" },
{ 0x04, "IMSI detached for non-EPS services" },
{ 0x05, "IMSI implicitly detached for non-EPS services" },
{ 0x06, "UE unreachable" },
{ 0x07, "Message not compatible with the protocol state" },
{ 0x08, "Missing mandatory information element" },
{ 0x09, "Invalid mandatory information" },
{ 0x0a, "Conditional information element error" },
{ 0x0b, "Semantically incorrect message" },
{ 0x0c, "Message unknown" },
{ 0x0d, "Mobile terminating CS fallback call rejected by the user" },
{ 0x0e, "UE temporarily unreachable" },
{ 0, NULL }
};
static value_string_ext sgsap_sgs_cause_values_ext = VALUE_STRING_EXT_INIT(sgsap_sgs_cause_values);
static guint16
de_sgsap_sgs_cause(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len _U_, gchar *add_string _U_, int string_len _U_)
{
guint32 curr_offset;
guint8 oct;
curr_offset = offset;
proto_tree_add_item(tree, hf_sgsap_sgs_cause, tvb, offset, 1, ENC_BIG_ENDIAN);
if (add_string) {
oct = tvb_get_guint8(tvb, curr_offset);
snprintf(add_string, string_len, " - %s", val_to_str_ext_const(oct, &sgsap_sgs_cause_values_ext, "Reserved"));
}
curr_offset++;
return(curr_offset - offset);
}
/*
* 9.4.19 SS code
* The coding of the SS code value is according to SS-Code as specified in
* subclause 17.7.5 of 3GPP TS 29.002 [15]
* ( packet-nas_eps.c)
*/
/*
* 9.4.20 TMSI
* See subclause 18.4.23 in 3GPP TS 29.018 [16].
* (packet-gsm_a_bssmap.c)
*/
/*
* 9.4.21 TMSI status
*
* See subclause 18.4.24 in 3GPP TS 29.018 [16].
* (packet-gsm_a_gm.c)
*/
/*
* 9.4.21a Tracking Area Identity
* Octets 3 to 7 contain the value part of the Tracking Area Identity information element defined in 3GPP TS 24.301 [14]
* (starting with octet 2, i.e. not including 3GPP TS 24.301 IEI)
* (packet-nas_eps.c)
*/
/*
* 9.4.21b UE Time Zone
* The coding of the UE Time Zone value is according to value part of the Time Zone information element as specified
* in subclause 10.5.3.8 of 3GPP TS 24.008 [8] (i.e. not including 3GPP TS 24.008 IEI)
* (packet-gsm_a_dtap.c)
*/
/*
* 9.4.21c UE EMM mode
*/
static const value_string sgsap_ue_emm_mode_values[] = {
{ 0x00, "EMM-IDLE" },
{ 0x01, "EMM-CONNECTED" },
{ 0, NULL }
};
static guint16
de_sgsap_ue_emm_mode(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len _U_, gchar *add_string _U_, int string_len _U_)
{
guint32 curr_offset;
curr_offset = offset;
proto_tree_add_item(tree, hf_sgsap_ue_emm_mode, tvb, offset, 1, ENC_BIG_ENDIAN);
curr_offset += 1;
return(curr_offset - offset);
}
/*
* 9.4.22 VLR name
*/
static guint16
de_sgsap_vlr_name(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len _U_, gchar *add_string _U_, int string_len _U_)
{
guint name_len;
guint8 *fqdn = NULL;
/* The VLR name information element specifies the VLR name and is coded as shown in figure 9.4.22.1.
* Octets 3 through n contain the VLR name in the form of a fully qualified domain name (FQDN)
* as specified in IETF RFC 1035 [21].
*/
if (len > 0) {
name_len = tvb_get_guint8(tvb, offset);
if (name_len < 0x20) {
fqdn = tvb_get_string_enc(pinfo->pool, tvb, offset, len, ENC_APN_STR);
} else{
fqdn = tvb_get_string_enc(pinfo->pool, tvb, offset, len, ENC_ASCII);
}
proto_tree_add_string(tree, hf_sgsap_vlr_name, tvb, offset, len, fqdn);
if (add_string)
snprintf(add_string, string_len, " - %s", fqdn);
}
return(len);
}
/*
* 9.4.23 Channel needed
* See subclause 18.4.2 in 3GPP TS 29.018 [16].
* The rest of the information element is coded as the IEI part and the
* value part of the Channel Needed IE defined in 3GPP TS 44.018
* (packet-gsm_a_bssmap.c)
*/
/*
* 9.4.24 eMLPP priority
* See subclause 18.4.4 in 3GPP TS 29.018 [16].
* The rest of the information element is coded as the value part of
* the eMLPP-Priority IE defined in 3GPP TS 48.008 (not including
* 3GPP TS 48.008 IEI and 3GPP TS 48.008 length indicator).
* (packet-gsm_a_bssmap.c)
*/
/*
*
*/
static guint16
de_sgsap_add_paging_ind(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len _U_, gchar *add_string _U_, int string_len _U_)
{
/* Octet 3 0 0 0 0 0 0 0 CSRI */
proto_tree_add_item(tree, hf_sgsap_csri, tvb, offset, 1, ENC_BIG_ENDIAN);
return(len);
}
#if 0
Reuse GSM_A_PDU_TYPE_GM, DE_NET_RES_ID_CONT
/*
* 9.4.26 TMSI based NRI container
*/
static guint16
de_sgsap_tmsi_based_nri_cont(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len _U_, gchar *add_string _U_, int string_len _U_)
{
/* See subclause 18.4.28 in 3GPP TS 29.018 [16].
* Which says The TMSI based NRI container value value consists of 10 bits which correspond to bits 23 to 14 of the valid TMSI
* (3GPP TS 23.236 and
* Octet 3 and Octet 4 The rest of the information element is coded as the value part of the Network resource identifier container IE
* defined in 3GPP TS 24.008.
*/
return(len);
}
#endif
/*
* 9.4.27 Selected CS domain operator
*/
static guint16
de_sgsap_selected_cs_dmn_op(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len _U_, gchar *add_string _U_, int string_len _U_)
{
proto_item *item;
proto_tree *sub_tree;
/* Coded as octets 2 to 4 of the Location Area Identification IE,
* defined in 3GPP TS 24.008 [8] (not including 3GPP TS 24.008 IEI
* and LAC).(10.5.1.3 Location Area Identification)
* MCC digit 2 MCC digit 1 octet 2
* MNC digit 3 MCC digit 3 octet 3
* MNC digit 2 MNC digit 1 octet 4
*/
item = proto_tree_add_item(tree, hf_sgsap_sel_cs_dmn_op, tvb, offset, 1, ENC_NA);
sub_tree = proto_item_add_subtree(item, ett_sgsap_sel_cs_dmn_op);
dissect_e212_mcc_mnc_wmem_packet_str(tvb, pinfo, sub_tree, offset, E212_LAI, TRUE);
return(len);
}
static const value_string sgsap_elem_strings[] = {
{ DE_SGSAP_IMSI, "IMSI" }, /* 9.4.6 */
{ DE_SGSAP_VLR_NAME, "VLR name" }, /* 9.4.22 */
{ DE_SGSAP_TMSI, "TMSI" }, /* 9.4.20 */
{ DE_SGSAP_LOC_AREA_ID, "Location area identifier" }, /* 9.4.11 */
{ DE_SGSAP_CH_NEEDED, "Channel Needed" }, /* 9.4.23 */
{ DE_SGSAP_EMLPP_PRIO, "eMLPP Priority" }, /* 9.4.24 */
{ DE_SGSAP_TMSI_STATUS, "TMSI status" }, /* 9.4.21 */
{ DE_SGSAP_SGS_CAUSE, "SGs cause" }, /* 9.4.18 */
{ DE_SGSAP_MME_NAME, "MME name" }, /* 9.4.13 */
{ DE_SGSAP_EPS_LOC_UPD_TYPE, "EPS location update type" }, /* 9.4.2 */
{ DE_SGSAP_GLOBAL_CN_ID, "Global CN-Id" }, /* 9.4.4 */
{ DE_SGSAP_UDEF_11, "Undefined" }, /* */
{ DE_SGSAP_UDEF_12, "Undefined" }, /* */
{ DE_SGSAP_MID, "Mobile identity" }, /* 9.4.14 */
{ DE_SGSAP_REJ_CAUSE, "Reject cause" }, /* 9.4.16 */
{ DE_SGSAP_IMSI_DET_EPS, "IMSI detach from EPS service type" }, /* 9.4.7 */
{ DE_SGSAP_IMSI_DET_NON_EPS, "IMSI detach from non-EPS service type" }, /* 9.4.8 */
{ DE_SGSAP_IMEISV, "IMEISV" }, /* 9.4.5 */
{ DE_SGSAP_NAS_MSG_CONTAINER, "NAS message container" }, /* 9.4.15 */
{ DE_SGSAP_MM_INFO, "MM information" }, /* 9.4.12 */
{ DE_SGSAP_UDEF_20, "Undefined" }, /* */
{ DE_SGSAP_UDEF_21, "Undefined" }, /* */
{ DE_SGSAP_UDEF_22, "Undefined" }, /* */
{ DE_SGSAP_ERR_MSG, "Erroneous message" }, /* 9.4.3 */
{ DE_SGSAP_CLI, "CLI" }, /* 9.4.1 */
{ DE_SGSAP_LCS_CLIENT_ID, "LCS client identity" }, /* 9.4.9 */
{ DE_SGSAP_LCS_INDIC, "LCS indicator" }, /* 9.4.10 */
{ DE_SGSAP_SS_CODE, "SS code" }, /* 9.4.19 */
{ DE_SGSAP_SERV_INDIC, "Service indicator" }, /* 9.4.17 */
{ DE_SGSAP_UE_TZ, "UE Time Zone" }, /* 9.4.21b */
{ DE_SGSAP_MSC_2, "Mobile Station Classmark 2" }, /* 9.4.14a */
{ DE_SGSAP_TAID, "Tracking Area Identity" }, /* 9.4.21a */
{ DE_SGSAP_ECGI, "E-UTRAN Cell Global Identity" }, /* 9.4.3a */
{ DE_SGSAP_UE_EMM_MODE, "UE EMM mode" }, /* 9.4.21c */
{ DE_SGSAP_ADD_PAGING_IND, "Additional paging indicators" }, /* 9.4.25 */
{ DE_SGSAP_TMSI_BASED_NRI_CONT, "TMSI based NRI container" }, /* 9.4.26 */
{ DE_SGSAP_SELECTED_CS_DMN_OP, "Selected CS domain operator" }, /* 9.4.27 */
{ 0, NULL }
};
value_string_ext sgsap_elem_strings_ext = VALUE_STRING_EXT_INIT(sgsap_elem_strings);
#define NUM_SGSAP_ELEM (sizeof(sgsap_elem_strings)/sizeof(value_string))
gint ett_sgsap_elem[NUM_SGSAP_ELEM];
#if 0
This enum has been moved to packet-gsm_a_common to
make it possible to use element dissecton from this dissector
in other dissectors.
It is left here as a comment for easier reference.
Note this enum must be of the same size as the element decoding list
typedef enum
{
DE_SGSAP_IMSI, /. 9.4.6 IMSI./
DE_SGSAP_VLR_NAME, /. 9.4.22 VLR name./
DE_SGSAP_TMSI, /. 9.4.20 TMSI ./
DE_SGSAP_LOC_AREA_ID, /. 9.4.11 Location area identifier ./
DE_SGSAP_CH_NEEDED, /. 9.4.23 Channel Needed ./
DE_SGSAP_EMLPP_PRIO, /. 9.4.24 eMLPP Priority./
DE_SGSAP_TMSI_STATUS, /. 9.4.21 TMSI status ./
DE_SGSAP_SGS_CAUSE, /. 9.4.18 SGs cause./
DE_SGSAP_MME_NAME, /. 9.4.13 MME name./
DE_SGSAP_EPS_LOC_UPD_TYPE, /. 9.4.2 EPS location update type./
DE_SGSAP_GLOBAL_CN_ID, /. 9.4.4 Global CN-Id./
DE_SGSAP_UDEF_11, /. Undefined ./
DE_SGSAP_UDEF_12, /. Undefined ./
DE_SGSAP_MID, /. 9.4.14 Mobile identity./
DE_SGSAP_REJ_CAUSE, /. 9.4.16 Reject cause ./
DE_SGSAP_IMSI_DET_EPS, /. 9.4.7 IMSI detach from EPS service type ./
DE_SGSAP_IMSI_DET_NON_EPS, /. 9.4.8 IMSI detach from non-EPS service type ./
DE_SGSAP_IMEISV, /. 9.4.5 IMEISV ./
DE_SGSAP_NAS_MSG_CONTAINER, /. 9.4.15 NAS message container./
DE_SGSAP_MM_INFO, /. 9.4.12 MM information./
DE_SGSAP_UDEF_20, /. Undefined ./
DE_SGSAP_UDEF_21, /. Undefined ./
DE_SGSAP_UDEF_22, /. Undefined ./
DE_SGSAP_ERR_MSG, /. 9.4.3 Erroneous message./
DE_SGSAP_CLI, /. 9.4.1 CLI ./
DE_SGSAP_LCS_CLIENT_ID, /. 9.4.9 LCS client identity ./
DE_SGSAP_LCS_INDIC, /. 9.4.10 LCS indicator ./
DE_SGSAP_SS_CODE, /. 9.4.19 SS code ./
DE_SGSAP_SERV_INDIC, /. 9.4.17 Service indicator ./
DE_SGSAP_UE_TZ, /. 9.4.21b UE Time Zone ./
DE_SGSAP_MSC_2, /. 9.4.14a Mobile Station Classmark 2 ./
DE_SGSAP_TAID, /. 9.4.21a Tracking Area Identity ./
DE_SGSAP_ECGI, /. 9.4.3a E-UTRAN Cell Global Identity ./
DE_SGSAP_UE_EMM_MODE, /. 9.4.21c UE EMM mode./
DE_SGSAP_ADD_PAGING_IND, /. 9.4.25 Additional paging indicators ./
DE_SGSAP_TMSI_BASED_NRI_CONT, /. 9.4.26 TMSI based NRI container ./
DE_SGSAP_SELECTED_CS_DMN_OP, /. 9.4.27 Selected CS domain operator ./
DE_SGAP_NONE /. NONE ./
}
sgsap_elem_idx_t;
#endif /* 0 */
guint16 (*sgsap_elem_fcn[])(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len, gchar *add_string, int string_len) = {
NULL/*DE_SGSAP_IMSI*/, /* 9.4.6 IMSI*/
de_sgsap_vlr_name, /* 9.4.22 VLR name*/
NULL/*DE_SGSAP_TMSI*/, /* 9.4.20 TMSI */
NULL/*DE_SGSAP_LOC_AREA_ID*/, /* 9.4.11 Location area identifier */
NULL/*DE_SGSAP_CH_NEEDED*/, /* 9.4.23 Channel Needed */
NULL/*DE_SGSAP_EMLPP_PRIO*/, /* 9.4.24 eMLPP Priority*/
NULL/*DE_SGSAP_TMSI_STATUS*/, /* 9.4.21 TMSI status */
de_sgsap_sgs_cause, /* 9.4.18 SGs cause*/
de_sgsap_mme_name, /* 9.4.13 MME name*/
de_sgsap_eps_loc_upd_type, /* 9.4.2 EPS location update type*/
de_sgsap_g_cn_id, /* 9.4.4 Global CN-Id*/
NULL/*DE_SGSAP_UDEF_11*/, /* Undefined */
NULL/*DE_SGSAP_UDEF_12*/, /* Undefined */
NULL/*DE_SGSAP_MID*/, /* 9.4.14 Mobile identity*/
NULL/*DE_SGSAP_REJ_CAUSE*/, /* 9.4.16 Reject cause */
de_sgsap_imsi_det_eps, /* 9.4.7 IMSI detach from EPS service type */
de_sgsap_imsi_det_non_eps, /* 9.4.8 IMSI detach from non-EPS service type */
de_sgsap_imeisv, /* 9.4.5 IMEISV */
de_sgsap_nas_msg_container, /* 9.4.15 NAS message container*/
de_sgsap_mm_info, /* 9.4.12 MM information*/
NULL/*DE_SGSAP_UDEF_20*/, /* Undefined */
NULL/*DE_SGSAP_UDEF_21*/, /* Undefined */
NULL/*DE_SGSAP_UDEF_22*/, /* Undefined */
de_sgsap_err_msg, /* 9.4.3 Erroneous message*/
NULL/*DE_SGSAP_CLI*/, /* 9.4.1 CLI */
NULL/*DE_SGSAP_LCS_CLIENT_ID*/, /* 9.4.9 LCS client identity */
de_sgsap_lcs_indic, /* 9.4.10 LCS indicator */
NULL/*DE_SGSAP_SS_CODE*/, /* 9.4.19 SS code */
de_sgsap_serv_indic, /* 9.4.17 Service indicator */
NULL/*DE_SGSAP_UE_TZ*/, /* 9.4.21b UE Time Zone */
NULL/*DE_SGSAP_MSC_2*/, /* 9.4.14a Mobile Station Classmark 2 */
NULL/*DE_SGSAP_TAID*/, /* 9.4.21a Tracking Area Identity */
de_sgsap_ecgi, /* 9.4.3a E-UTRAN Cell Global Identity */
de_sgsap_ue_emm_mode, /* 9.4.21c UE EMM mode*/
de_sgsap_add_paging_ind, /* 9.4.25 Additional paging indicators */
NULL/*DE_SGSAP_TMSI_BASED_NRI_CONT */, /* 9.4.26 TMSI based NRI container (Reuse GSM_A_PDU_TYPE_GM, DE_NET_RES_ID_CONT */
de_sgsap_selected_cs_dmn_op, /* 9.4.27 Selected CS domain operator */
NULL, /* NONE */
};
/* MESSAGE FUNCTIONS */
/*
* 8.1 SGsAP-ALERT-ACK message
*/
static void
sgsap_alert_ack(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len)
{
guint32 curr_offset;
guint32 consumed;
guint curr_len;
curr_offset = offset;
curr_len = len;
/* IMSI IMSI 9.4.6 M TLV 6-10 */
ELEM_MAND_TLV(0x01, GSM_A_PDU_TYPE_BSSMAP, BE_IMSI, NULL, ei_sgsap_missing_mandatory_element);
EXTRANEOUS_DATA_CHECK(curr_len, 0, pinfo, &ei_sgsap_extraneous_data);
}
/*
* 8.2 SGsAP-ALERT-REJECT message
*/
static void
sgsap_alert_rej(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len)
{
guint32 curr_offset;
guint32 consumed;
guint curr_len;
curr_offset = offset;
curr_len = len;
/* IMSI IMSI 9.4.6 M TLV 6-10 */
ELEM_MAND_TLV(0x01, GSM_A_PDU_TYPE_BSSMAP, BE_IMSI, NULL, ei_sgsap_missing_mandatory_element);
/* SGs Cause SGs cause 9.4.18 M TLV 3 */
ELEM_MAND_TLV(0x08, SGSAP_PDU_TYPE, DE_SGSAP_SGS_CAUSE, NULL, ei_sgsap_missing_mandatory_element);
EXTRANEOUS_DATA_CHECK(curr_len, 0, pinfo, &ei_sgsap_extraneous_data);
}
/*
* 8.3 SGsAP-ALERT-REQUEST message
*/
static void
sgsap_alert_req(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len)
{
guint32 curr_offset;
guint32 consumed;
guint curr_len;
curr_offset = offset;
curr_len = len;
/* IMSI IMSI 9.4.6 M TLV 6-10 */
ELEM_MAND_TLV(0x01, GSM_A_PDU_TYPE_BSSMAP, BE_IMSI, NULL, ei_sgsap_missing_mandatory_element);
EXTRANEOUS_DATA_CHECK(curr_len, 0, pinfo, &ei_sgsap_extraneous_data);
}
/*
* 8.4 SGsAP-DOWNLINK-UNITDATA message
*/
static void
sgsap_dl_unitdata(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len)
{
guint32 curr_offset;
guint32 consumed;
guint curr_len;
curr_offset = offset;
curr_len = len;
/* IMSI IMSI 9.4.6 M TLV 6-10 */
ELEM_MAND_TLV(0x01, GSM_A_PDU_TYPE_BSSMAP, BE_IMSI, NULL, ei_sgsap_missing_mandatory_element);
/* NAS message container NAS message container 9.4.15 M TLV 4-253 */
ELEM_MAND_TLV(0x16, SGSAP_PDU_TYPE, DE_SGSAP_NAS_MSG_CONTAINER, NULL, ei_sgsap_missing_mandatory_element);
EXTRANEOUS_DATA_CHECK(curr_len, 0, pinfo, &ei_sgsap_extraneous_data);
}
/*
* 8.5 SGsAP-EPS-DETACH-ACK message
*/
static void
sgsap_eps_det_ack(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len)
{
guint32 curr_offset;
guint32 consumed;
guint curr_len;
curr_offset = offset;
curr_len = len;
/* IMSI IMSI 9.4.6 M TLV 6-10 */
ELEM_MAND_TLV(0x01, GSM_A_PDU_TYPE_BSSMAP, BE_IMSI, NULL, ei_sgsap_missing_mandatory_element);
EXTRANEOUS_DATA_CHECK(curr_len, 0, pinfo, &ei_sgsap_extraneous_data);
}
/*
* 8.6 SGsAP-EPS-DETACH-INDICATION message
*/
static void
sgsap_eps_det_ind(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len)
{
guint32 curr_offset;
guint32 consumed;
guint curr_len;
curr_offset = offset;
curr_len = len;
/* IMSI IMSI 9.4.6 M TLV 6-10 */
ELEM_MAND_TLV(0x01, GSM_A_PDU_TYPE_BSSMAP, BE_IMSI, NULL, ei_sgsap_missing_mandatory_element);
/* MME name MME name 9.4.13 M TLV 57 */
ELEM_MAND_TLV(0x09, SGSAP_PDU_TYPE, DE_SGSAP_MME_NAME, NULL, ei_sgsap_missing_mandatory_element);
/* IMSI detach from EPS service type IMSI detach from EPS service type 9.4.7 M TLV 3 */
ELEM_MAND_TLV(0x10, SGSAP_PDU_TYPE, DE_SGSAP_IMSI_DET_EPS, NULL, ei_sgsap_missing_mandatory_element);
EXTRANEOUS_DATA_CHECK(curr_len, 0, pinfo, &ei_sgsap_extraneous_data);
}
/*
* 8.7 SGsAP-IMSI-DETACH-ACK message
*/
static void
sgsap_imsi_det_ack(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len)
{
guint32 curr_offset;
guint32 consumed;
guint curr_len;
curr_offset = offset;
curr_len = len;
/* IMSI IMSI 9.4.6 M TLV 6-10 */
ELEM_MAND_TLV(0x01, GSM_A_PDU_TYPE_BSSMAP, BE_IMSI, NULL, ei_sgsap_missing_mandatory_element);
EXTRANEOUS_DATA_CHECK(curr_len, 0, pinfo, &ei_sgsap_extraneous_data);
}
/*
* 8.8 SGsAP-IMSI-DETACH-INDICATION message
*/
static void
sgsap_imsi_det_ind(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len)
{
guint32 curr_offset;
guint32 consumed;
guint curr_len;
curr_offset = offset;
curr_len = len;
/* IMSI IMSI 9.4.6 M TLV 6-10 */
ELEM_MAND_TLV(0x01, GSM_A_PDU_TYPE_BSSMAP, BE_IMSI, NULL, ei_sgsap_missing_mandatory_element);
/* MME name MME name 9.4.13 M TLV 57 */
ELEM_MAND_TLV(0x09, SGSAP_PDU_TYPE, DE_SGSAP_MME_NAME, NULL, ei_sgsap_missing_mandatory_element);
/* IMSI Detach from non-EPS service type IMSI detach from non-EPS service type 9.4.8 M TLV 3 */
ELEM_MAND_TLV(0x11, SGSAP_PDU_TYPE, DE_SGSAP_IMSI_DET_NON_EPS, NULL, ei_sgsap_missing_mandatory_element);
EXTRANEOUS_DATA_CHECK(curr_len, 0, pinfo, &ei_sgsap_extraneous_data);
}
/*
* 8.9 SGsAP-LOCATION-UPDATE-ACCEPT message
*/
static void
sgsap_imsi_loc_update_acc(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len)
{
guint32 curr_offset;
guint32 consumed;
guint curr_len;
curr_offset = offset;
curr_len = len;
/* IMSI IMSI 9.4.6 M TLV 6-10 */
ELEM_MAND_TLV(0x01, GSM_A_PDU_TYPE_BSSMAP, BE_IMSI, NULL, ei_sgsap_missing_mandatory_element);
/* Location area identifier Location area identifier 9.4.11 M TLV 7 */
ELEM_MAND_TLV(0x04, GSM_A_PDU_TYPE_COMMON, DE_LAI, NULL, ei_sgsap_missing_mandatory_element);
/* New TMSI, or IMSI Mobile identity 9.4.14 O TLV 6-10 */
ELEM_OPT_TLV(0x0e, GSM_A_PDU_TYPE_COMMON, DE_MID, " - New TMSI, or IMSI");
EXTRANEOUS_DATA_CHECK(curr_len, 0, pinfo, &ei_sgsap_extraneous_data);
}
/*
* 8.10 SGsAP-LOCATION-UPDATE-REJECT message
*/
static void
sgsap_imsi_loc_update_rej(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len)
{
guint32 curr_offset;
guint32 consumed;
guint curr_len;
curr_offset = offset;
curr_len = len;
/* IMSI IMSI 9.4.6 M TLV 6-10 */
ELEM_MAND_TLV(0x01, GSM_A_PDU_TYPE_BSSMAP, BE_IMSI, NULL, ei_sgsap_missing_mandatory_element);
/* Reject cause Reject cause 9.4.16 M TLV 3 */
ELEM_MAND_TLV(0x0f, GSM_A_PDU_TYPE_DTAP, DE_REJ_CAUSE, NULL, ei_sgsap_missing_mandatory_element);
/* Location area identifier Location area identifier 9.4.11 O TLV 7 */
ELEM_OPT_TLV(0x04, GSM_A_PDU_TYPE_COMMON, DE_LAI, NULL);
EXTRANEOUS_DATA_CHECK(curr_len, 0, pinfo, &ei_sgsap_extraneous_data);
}
/*
* 8.11 SGsAP-LOCATION-UPDATE-REQUEST message
*/
static void
sgsap_imsi_loc_update_req(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len)
{
guint32 curr_offset;
guint32 consumed;
guint curr_len;
curr_offset = offset;
curr_len = len;
/* IMSI IMSI 9.4.6 M TLV 6-10 */
ELEM_MAND_TLV(0x01, GSM_A_PDU_TYPE_BSSMAP, BE_IMSI, NULL, ei_sgsap_missing_mandatory_element);
/* MME name MME name 9.4.13 M TLV 57 */
ELEM_MAND_TLV(0x09, SGSAP_PDU_TYPE, DE_SGSAP_MME_NAME, NULL, ei_sgsap_missing_mandatory_element);
/* EPS location update type EPS location update type 9.4.2 M TLV 3 */
ELEM_MAND_TLV(0x0a, SGSAP_PDU_TYPE, DE_SGSAP_EPS_LOC_UPD_TYPE, NULL, ei_sgsap_missing_mandatory_element);
/* New location area identifier Location area identifier 9.4.11 M TLV 7 */
ELEM_MAND_TLV(0x04, GSM_A_PDU_TYPE_COMMON, DE_LAI, NULL, ei_sgsap_missing_mandatory_element);
/* Old location area identifier Location area identifier 9.4.11 O TLV 7 */
ELEM_OPT_TLV(0x04, GSM_A_PDU_TYPE_COMMON, DE_LAI, " - Old location area identifier");
/* TMSI status TMSI status 9.4.21 O TLV 3 */
ELEM_OPT_TLV( 0x07 , GSM_A_PDU_TYPE_GM, DE_TMSI_STAT , NULL );
/* IMEISV IMEISV 9.4.5 O TLV 10 */
ELEM_OPT_TLV(0x15, SGSAP_PDU_TYPE, DE_SGSAP_IMEISV, NULL);
/* TAI Tracking Area Identity 9.4.21a O TLV 7 */
ELEM_OPT_TLV(0x23, NAS_PDU_TYPE_EMM, DE_EMM_TRAC_AREA_ID, NULL);
/* E-CGI E-UTRAN Cell Global Identity 9.4.3a O TLV 9 */
ELEM_OPT_TLV(0x24, SGSAP_PDU_TYPE, DE_SGSAP_ECGI, NULL);
/* TMSI based NRI container TMSI based NRI container 9.4.26 O TLV 4 */
ELEM_OPT_TLV(0x27, GSM_A_PDU_TYPE_GM, DE_NET_RES_ID_CONT, " - TMSI based NRI container");
/* Selected CS domain operator Selected CS domain operator 9.4.27 O TLV 5 */
ELEM_OPT_TLV(0x28, SGSAP_PDU_TYPE, DE_SGSAP_SELECTED_CS_DMN_OP, NULL);
EXTRANEOUS_DATA_CHECK(curr_len, 0, pinfo, &ei_sgsap_extraneous_data);
}
/*
* 8.12 SGsAP-MM-INFORMATION-REQUEST
*/
static void
sgsap_mm_info_req(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len)
{
guint32 curr_offset;
guint32 consumed;
guint curr_len;
curr_offset = offset;
curr_len = len;
/* IMSI IMSI 9.4.6 M TLV 6-10 */
ELEM_MAND_TLV(0x01, GSM_A_PDU_TYPE_BSSMAP, BE_IMSI, NULL, ei_sgsap_missing_mandatory_element);
/* MM information MM information 9.4.12 M TLV 3-n */
ELEM_MAND_TLV(0x17, SGSAP_PDU_TYPE, DE_SGSAP_MM_INFO, NULL, ei_sgsap_missing_mandatory_element);
EXTRANEOUS_DATA_CHECK(curr_len, 0, pinfo, &ei_sgsap_extraneous_data);
}
/*
* 8.13 SGsAP-PAGING-REJECT message
*/
static void
sgsap_paging_rej(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len)
{
guint32 curr_offset;
guint32 consumed;
guint curr_len;
curr_offset = offset;
curr_len = len;
/* IMSI IMSI 9.4.6 M TLV 6-10 */
ELEM_MAND_TLV(0x01, GSM_A_PDU_TYPE_BSSMAP, BE_IMSI, NULL, ei_sgsap_missing_mandatory_element);
/* SGs Cause SGs Cause 9.4.18 M TLV 3 */
ELEM_MAND_TLV(0x08, SGSAP_PDU_TYPE, DE_SGSAP_SGS_CAUSE, NULL, ei_sgsap_missing_mandatory_element);
EXTRANEOUS_DATA_CHECK(curr_len, 0, pinfo, &ei_sgsap_extraneous_data);
}
/*
* 8.14 SGsAP-PAGING-REQUEST message
*/
static void
sgsap_paging_req(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len)
{
guint32 curr_offset;
guint32 consumed;
guint curr_len;
curr_offset = offset;
curr_len = len;
/* IMSI IMSI 9.4.6 M TLV 6-10 */
ELEM_MAND_TLV(0x01, GSM_A_PDU_TYPE_BSSMAP, BE_IMSI, NULL, ei_sgsap_missing_mandatory_element);
/* VLR name VLR name 9.4.22 M TLV 3-n */
ELEM_MAND_TLV(0x02, SGSAP_PDU_TYPE, DE_SGSAP_VLR_NAME, NULL, ei_sgsap_missing_mandatory_element);
/* Service indicator Service indicator 9.4.17 M TLV 3 */
ELEM_MAND_TLV(0x20, SGSAP_PDU_TYPE, DE_SGSAP_SERV_INDIC, NULL, ei_sgsap_missing_mandatory_element);
/* TMSI TMSI 9.4.20 O TLV 6 */
ELEM_OPT_TLV(0x03, GSM_A_PDU_TYPE_BSSMAP, BE_TMSI, NULL);
/* CLI CLI 9.4.1 O TLV 3-14 */
ELEM_OPT_TLV(0x1c, GSM_A_PDU_TYPE_DTAP, DE_CLG_PARTY_BCD_NUM, " - CLI");
/* Location area identifier Location area identifier 9.4.11 O TLV 7 */
ELEM_OPT_TLV(0x04, GSM_A_PDU_TYPE_COMMON, DE_LAI, NULL);
/* Global CN-Id Global CN-Id 9.4.4 O TLV 7 */
ELEM_OPT_TLV(0x0b, SGSAP_PDU_TYPE, DE_SGSAP_GLOBAL_CN_ID, NULL);
/* SS code SS code 9.4.19 O TLV 3 */
ELEM_OPT_TLV(0x1f, NAS_PDU_TYPE_EMM, DE_EMM_SS_CODE, NULL);
/* LCS indicator LCS indicator 9.4.10 O TLV 3 */
ELEM_OPT_TLV(0x1e, SGSAP_PDU_TYPE, DE_SGSAP_LCS_INDIC, NULL);
/* LCS client identity LCS client identity 9.4.9 O TLV 3-n */
ELEM_OPT_TLV(0x1d, NAS_PDU_TYPE_EMM, DE_EMM_LCS_CLIENT_ID, NULL);
/* Channel needed Channel needed 9.4.23 O TLV 3 */
ELEM_OPT_TLV(0x05, GSM_A_PDU_TYPE_BSSMAP, BE_CHAN_NEEDED, NULL);
/* eMLPP Priority eMLPP Priority 9.4.24 O TLV 3 */
ELEM_OPT_TLV(0x06, GSM_A_PDU_TYPE_BSSMAP, BE_EMLPP_PRIO, NULL);
/* Additional paging indicators Additional paging indicators 9.4.25 O TLV 3 */
ELEM_OPT_TLV(0x26, SGSAP_PDU_TYPE, DE_SGSAP_ADD_PAGING_IND, NULL);
EXTRANEOUS_DATA_CHECK(curr_len, 0, pinfo, &ei_sgsap_extraneous_data);
}
/*
* 8.15 SGsAP-RESET-ACK message
*/
static void
sgsap_reset_ack(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len)
{
guint32 curr_offset;
guint32 consumed;
guint curr_len;
curr_offset = offset;
curr_len = len;
/* MME name MME name 9.4.13 C TLV 57 */
ELEM_OPT_TLV(0x09, SGSAP_PDU_TYPE, DE_SGSAP_MME_NAME, NULL);
/* VLR name VLR name 9.4.22 C TLV 3-n */
ELEM_OPT_TLV(0x02, SGSAP_PDU_TYPE, DE_SGSAP_VLR_NAME, NULL);
EXTRANEOUS_DATA_CHECK(curr_len, 0, pinfo, &ei_sgsap_extraneous_data);
}
/*
* 8.16 SGsAP-RESET-INDICATION message
*/
static void
sgsap_reset_ind(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len)
{
guint32 curr_offset;
guint32 consumed;
guint curr_len;
curr_offset = offset;
curr_len = len;
/* MME name MME name 9.4.13 C TLV 57 */
ELEM_OPT_TLV(0x09, SGSAP_PDU_TYPE, DE_SGSAP_MME_NAME, NULL);
/* VLR name VLR name 9.4.22 C TLV 3-n */
ELEM_OPT_TLV(0x02, SGSAP_PDU_TYPE, DE_SGSAP_VLR_NAME, NULL);
EXTRANEOUS_DATA_CHECK(curr_len, 0, pinfo, &ei_sgsap_extraneous_data);
}
/*
* 8.17 SGsAP-SERVICE-REQUEST message
*/
static void
sgsap_service_req(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len)
{
guint32 curr_offset;
guint32 consumed;
guint curr_len;
curr_offset = offset;
curr_len = len;
/*IMSI IMSI 9.4.6 M TLV 6-10 */
ELEM_MAND_TLV(0x01, GSM_A_PDU_TYPE_BSSMAP, BE_IMSI, NULL, ei_sgsap_missing_mandatory_element);
/* Service indicator Service indicator 9.4.17 M TLV 3 */
ELEM_MAND_TLV(0x20, SGSAP_PDU_TYPE, DE_SGSAP_SERV_INDIC, NULL, ei_sgsap_missing_mandatory_element);
/* IMEISV IMEISV 9.4.5 O TLV 10 */
ELEM_OPT_TLV(0x15, SGSAP_PDU_TYPE, DE_SGSAP_IMEISV, NULL);
/* UE Time Zone UE Time Zone 9.4.21b O TLV 3 */
ELEM_OPT_TLV(0x21, GSM_A_PDU_TYPE_DTAP, DE_TIME_ZONE, " - UE Time Zone");
/* Mobile Station Classmark 2 Mobile Station Classmark 2 9.4.14a O TLV 5 */
ELEM_OPT_TLV(0x22 , GSM_A_PDU_TYPE_COMMON, DE_MS_CM_2, NULL);
/* TAI Tracking Area Identity 9.4.21a O TLV 7 */
ELEM_OPT_TLV(0x23, NAS_PDU_TYPE_EMM, DE_EMM_TRAC_AREA_ID, NULL);
/* E-CGI E-UTRAN Cell Global Identity 9.4.3a O TLV 9 */
ELEM_OPT_TLV(0x24, SGSAP_PDU_TYPE, DE_SGSAP_ECGI, NULL);
/* UE EMM Mode UE EMM mode 9.4.21c O TLV 3 */
ELEM_OPT_TLV(0x25, SGSAP_PDU_TYPE, DE_SGSAP_UE_EMM_MODE, NULL);
EXTRANEOUS_DATA_CHECK(curr_len, 0, pinfo, &ei_sgsap_extraneous_data);
}
/*
* 8.18 SGsAP-STATUS message
*/
static void
sgsap_status(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len)
{
guint32 curr_offset;
guint32 consumed;
guint curr_len;
curr_offset = offset;
curr_len = len;
/* IMSI IMSI 9.4.6 O TLV 6-10 */
ELEM_OPT_TLV(0x01, GSM_A_PDU_TYPE_BSSMAP, BE_IMSI, NULL);
/* SGs cause SGs cause 9.4.18 M TLV 3 */
ELEM_MAND_TLV(0x08, SGSAP_PDU_TYPE, DE_SGSAP_SGS_CAUSE, NULL, ei_sgsap_missing_mandatory_element);
/* Erroneous message Erroneous message 9.4.3 M TLV 3-n */
ELEM_OPT_TLV(0x1b, SGSAP_PDU_TYPE, DE_SGSAP_ERR_MSG, NULL);
EXTRANEOUS_DATA_CHECK(curr_len, 0, pinfo, &ei_sgsap_extraneous_data);
}
/*
* 8.19 SGsAP-TMSI-REALLOCATION-COMPLETE message
*/
static void
sgsap_tmsi_realloc_comp(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len)
{
guint32 curr_offset;
guint32 consumed;
guint curr_len;
curr_offset = offset;
curr_len = len;
/*IMSI IMSI 9.4.6 M TLV 6-10 */
ELEM_MAND_TLV(0x01, GSM_A_PDU_TYPE_BSSMAP, BE_IMSI, NULL, ei_sgsap_missing_mandatory_element);
EXTRANEOUS_DATA_CHECK(curr_len, 0, pinfo, &ei_sgsap_extraneous_data);
}
/*
* 8.20 SGsAP-UE-ACTIVITY-INDICATION message
*/
static void
sgsap_ue_act_ind(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len)
{
guint32 curr_offset;
guint32 consumed;
guint curr_len;
curr_offset = offset;
curr_len = len;
/* IMSI IMSI 9.4.6 M TLV 6-10 */
ELEM_MAND_TLV(0x01, GSM_A_PDU_TYPE_BSSMAP, BE_IMSI, NULL, ei_sgsap_missing_mandatory_element);
EXTRANEOUS_DATA_CHECK(curr_len, 0, pinfo, &ei_sgsap_extraneous_data);
}
/*
* 8.21 SGsAP-UE-UNREACHABLE message
*/
static void
sgsap_ue_unreachable(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len)
{
guint32 curr_offset;
guint32 consumed;
guint curr_len;
curr_offset = offset;
curr_len = len;
/* IMSI IMSI 9.4.6 M TLV 6-10 */
ELEM_MAND_TLV(0x01, GSM_A_PDU_TYPE_BSSMAP, BE_IMSI, NULL, ei_sgsap_missing_mandatory_element);
/* SGs cause SGs cause 9.4.18 M TLV 3 */
ELEM_MAND_TLV(0x08, SGSAP_PDU_TYPE, DE_SGSAP_SGS_CAUSE, NULL, ei_sgsap_missing_mandatory_element);
EXTRANEOUS_DATA_CHECK(curr_len, 0, pinfo, &ei_sgsap_extraneous_data);
}
/*
* 8.22 SGsAP-UPLINK-UNITDATA message
*/
static void
sgsap_ue_ul_unitdata(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len)
{
guint32 curr_offset;
guint32 consumed;
guint curr_len;
curr_offset = offset;
curr_len = len;
/* IMSI IMSI 9.4.6 M TLV 6-10 */
ELEM_MAND_TLV(0x01, GSM_A_PDU_TYPE_BSSMAP, BE_IMSI, NULL, ei_sgsap_missing_mandatory_element);
/* NAS message container NAS message container 9.4.15 M TLV 4-253 */
ELEM_MAND_TLV(0x16, SGSAP_PDU_TYPE, DE_SGSAP_NAS_MSG_CONTAINER, NULL, ei_sgsap_missing_mandatory_element);
/* IMEISV IMEISV 9.4.5 O TLV 10 */
ELEM_OPT_TLV(0x15, SGSAP_PDU_TYPE, DE_SGSAP_IMEISV, NULL);
/* UE Time Zone UE Time Zone 9.4.21b O TLV 3 */
ELEM_OPT_TLV(0x21, GSM_A_PDU_TYPE_DTAP, DE_TIME_ZONE, " - UE Time Zone");
/* Mobile Station Classmark 2 Mobile Station Classmark 2 9.4.14a O TLV 5 */
ELEM_OPT_TLV(0x22 , GSM_A_PDU_TYPE_COMMON, DE_MS_CM_2, NULL);
/* TAI Tracking Area Identity 9.4.21a O TLV 7 */
ELEM_OPT_TLV(0x23, NAS_PDU_TYPE_EMM, DE_EMM_TRAC_AREA_ID, NULL);
/* E-CGI E-UTRAN Cell Global Identity 9.4.3a O TLV 9 */
ELEM_OPT_TLV(0x24, SGSAP_PDU_TYPE, DE_SGSAP_ECGI, NULL);
EXTRANEOUS_DATA_CHECK(curr_len, 0, pinfo, &ei_sgsap_extraneous_data);
}
/*
* 8.23 SGsAP-RELEASE-REQUEST message
*/
static void
sgsap_release_req(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len)
{
guint32 curr_offset;
guint32 consumed;
guint curr_len;
curr_offset = offset;
curr_len = len;
/* IMSI IMSI 9.4.6 M TLV 6-10 */
ELEM_MAND_TLV(0x01, GSM_A_PDU_TYPE_BSSMAP, BE_IMSI, NULL, ei_sgsap_missing_mandatory_element);
/* SGs cause SGs cause 9.4.18 O TLV 3 */
ELEM_OPT_TLV(0x08, SGSAP_PDU_TYPE, DE_SGSAP_SGS_CAUSE, NULL);
EXTRANEOUS_DATA_CHECK(curr_len, 0, pinfo, &ei_sgsap_extraneous_data);
}
/*
* 8.24 SGsAP-SERVICE-ABORT-REQUEST message
*/
static void
sgsap_service_abort_req(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len)
{
guint32 curr_offset;
guint32 consumed;
guint curr_len;
curr_offset = offset;
curr_len = len;
/* IMSI IMSI 9.4.6 M TLV 6-10 */
ELEM_MAND_TLV(0x01, GSM_A_PDU_TYPE_BSSMAP, BE_IMSI, NULL, ei_sgsap_missing_mandatory_element);
EXTRANEOUS_DATA_CHECK(curr_len, 0, pinfo, &ei_sgsap_extraneous_data);
}
/*
* 8.25 SGsAP-MO-CSFB-INDICATION message
*/
static void
sgsap_mo_csfb_ind(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len)
{
guint32 curr_offset;
guint32 consumed;
guint curr_len;
curr_offset = offset;
curr_len = len;
/* IMSI IMSI 9.4.6 M TLV 6-10 */
ELEM_MAND_TLV(0x01, GSM_A_PDU_TYPE_BSSMAP, BE_IMSI, NULL, ei_sgsap_missing_mandatory_element);
/* TAI Tracking Area Identity 9.4.21a O TLV 7 */
ELEM_OPT_TLV(0x23, NAS_PDU_TYPE_EMM, DE_EMM_TRAC_AREA_ID, NULL);
/* E-CGI E-UTRAN Cell Global Identity 9.4.3a O TLV 9 */
ELEM_OPT_TLV(0x24, SGSAP_PDU_TYPE, DE_SGSAP_ECGI, NULL);
EXTRANEOUS_DATA_CHECK(curr_len, 0, pinfo, &ei_sgsap_extraneous_data);
}
/*
* 9.2 Message type
*/
static const value_string sgsap_msg_strings[] = {
{ 0x01, "SGsAP-PAGING-REQUEST"}, /* 8.14 */
{ 0x02, "SGsAP-PAGING-REJECT"}, /* 8.13 */
/*
* 0 0 0 0 0 0 1 1
* to
* 0 0 0 0 0 1 0 1
* Unassigned: treated as an unknown Message type
*/
{ 0x03, "Unassigned"}, /* 7 */
{ 0x04, "Unassigned"}, /* 7 */
{ 0x05, "Unassigned"}, /* 7 */
{ 0x06, "SGsAP-SERVICE-REQUEST"}, /* 8.17 */
{ 0x07, "SGsAP-DOWNLINK-UNITDATA"}, /* 8.4 */
{ 0x08, "SGsAP-UPLINK-UNITDATA"}, /* 8.22 */
{ 0x09, "SGsAP-LOCATION-UPDATE-REQUEST"}, /* 8.11 */
{ 0x0a, "SGsAP-LOCATION-UPDATE-ACCEPT"}, /* 8.9 */
{ 0x0b, "SGsAP-LOCATION-UPDATE-REJECT"}, /* 8.10 */
{ 0x0c, "SGsAP-TMSI-REALLOCATION-COMPLETE"}, /* 8.19 */
{ 0x0d, "SGsAP-ALERT-REQUEST"}, /* 8.3 */
{ 0x0e, "SGsAP-ALERT-ACK"}, /* 8.1 */
{ 0x0f, "SGsAP-ALERT-REJECT"}, /* 8.2 */
{ 0x10, "SGsAP-UE-ACTIVITY-INDICATION"}, /* 8.20 */
{ 0x11, "SGsAP-EPS-DETACH-INDICATION"}, /* 8.6 */
{ 0x12, "SGsAP-EPS-DETACH-ACK"}, /* 8.5 */
{ 0x13, "SGsAP-IMSI-DETACH-INDICATION"}, /* 8.8 */
{ 0x14, "SGsAP-IMSI-DETACH-ACK"}, /* 8.7 */
{ 0x15, "SGsAP-RESET-INDICATION"}, /* 8.16 */
{ 0x16, "SGsAP-RESET-ACK"}, /* 8.15 */
{ 0x17, "SGsAP-SERVICE-ABORT-REQUEST"}, /* 8.24 */
{ 0x18, "SGsAP-MO-CSFB-INDICATION"}, /* 8.25 */
/*
* 0 0 0 1 1 0 0 0
* to
* 0 0 0 1 1 0 0 1
* Unassigned: treated as an unknown Message type
*/
{ 0x19, "Unassigned"},
{ 0x1a, "SGsAP-MM-INFORMATION-REQUEST"}, /* 8.12 */
{ 0x1b, "SGsAP-RELEASE-REQUEST"}, /* 8.23 */
/*
* 0 0 0 1 1 1 0 0 Unassigned: treated as an unknown Message type 7
*/
{ 0x1c, "Unassigned"}, /* 7 */
{ 0x1d, "SGsAP-STATUS"}, /* 8.18 */
{ 0x1e, "Unassigned"}, /* 7 */
{ 0x1f, "SGsAP-UE-UNREACHABLE"}, /* 8.21 */
{ 0, NULL }
};
static value_string_ext sgsap_msg_strings_ext = VALUE_STRING_EXT_INIT(sgsap_msg_strings);
#define NUM_SGSAP_MSG (sizeof(sgsap_msg_strings)/sizeof(value_string))
static gint ett_sgsap_msg[NUM_SGSAP_MSG];
static void (*sgsap_msg_fcn[])(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo _U_, guint32 offset, guint len) = {
sgsap_paging_req, /* 0x01, "SGsAP-PAGING-REQUEST" 8.14 */
sgsap_paging_rej, /* 0x02, "SGsAP-PAGING-REJECT" 8.13 */
/*
* 0 0 0 0 0 0 1 1
* to
* 0 0 0 0 0 1 0 1
* Unassigned: treated as an unknown Message type
*/
NULL, /* 0x03, "Unassigned" 7 */
NULL, /* 0x04, "Unassigned" 7 */
NULL, /* 0x05, "Unassigned" 7 */
sgsap_service_req, /* 0x06, "SGsAP-SERVICE-REQUEST" 8.17 */
sgsap_dl_unitdata, /* 0x07, "SGsAP-DOWNLINK-UNITDATA" 8.4 */
sgsap_ue_ul_unitdata, /* 0x08, "SGsAP-UPLINK-UNITDATA" 8.22 */
sgsap_imsi_loc_update_req, /* 0x09, "SGsAP-LOCATION-UPDATE-REQUEST" 8.11 */
sgsap_imsi_loc_update_acc, /* 0x0a, "SGsAP-LOCATION-UPDATE-ACCEPT" 8.9 */
sgsap_imsi_loc_update_rej, /* 0x0b, "SGsAP-LOCATION-UPDATE-REJECT" 8.10 */
sgsap_tmsi_realloc_comp, /* 0x0c, "SGsAP-TMSI-REALLOCATION-COMPLETE" 8.19 */
sgsap_alert_req, /* 0x0d, "SGsAP-ALERT-REQUEST" 8.3 */
sgsap_alert_ack, /* 0x0e, "SGsAP-ALERT-ACK" 8.1 */
sgsap_alert_rej, /* 0x0f, "SGsAP-ALERT-REJECT" 8.2 */
sgsap_ue_act_ind, /* 0x10, "SGsAP-UE-ACTIVITY-INDICATION" 8.20 */
sgsap_eps_det_ind, /* 0x11, "SGsAP-EPS-DETACH-INDICATION" 8.6 */
sgsap_eps_det_ack, /* 0x12, "SGsAP-EPS-DETACH-ACK" 8.5 */
sgsap_imsi_det_ind, /* 0x13, "SGsAP-IMSI-DETACH-INDICATION" 8.8 */
sgsap_imsi_det_ack, /* 0x14, "SGsAP-IMSI-DETACH-ACK" 8.7 */
sgsap_reset_ind, /* 0x15, "SGsAP-RESET-INDICATION" 8.16 */
sgsap_reset_ack, /* 0x16, "SGsAP-RESET-ACK" 8.15 */
sgsap_service_abort_req, /* 0x17, "SGsAP-SERVICE-ABORT-REQUEST" 8.24 */
sgsap_mo_csfb_ind, /* 0x18, "SGsAP-MO-CSFB-INDICATION" 8.25 */
/*
* 0 0 0 1 1 0 0 1
* to
* 0 0 0 1 1 0 0 1
* Unassigned: treated as an unknown Message type
*/
NULL, /* 0x19, "Unassigned" */
sgsap_mm_info_req, /* 0x1a, "SGsAP-MM-INFORMATION-REQUEST" 8.12 */
sgsap_release_req, /* 0x1b, "SGsAP-RELEASE-REQUEST" 8.23 */
/*
* 0 0 0 1 1 1 0 0 Unassigned: treated as an unknown Message type 7
*/
NULL, /* 0x1c, "Unassigned" */
sgsap_status, /* 0x1d, "SGsAP-STATUS" 8.18 */
NULL, /* 0x1e, "Unassigned" */
sgsap_ue_unreachable, /* 0x1f, "SGsAP-UE-UNREACHABLE" 8.21 */
NULL, /* NONE */
};
static void get_sgsap_msg_params(guint8 oct, const gchar **msg_str, int *ett_tree, int *hf_idx, msg_fcn *msg_fcn_p)
{
gint idx;
*msg_str = try_val_to_str_idx_ext((guint32) (oct & 0xff), &sgsap_msg_strings_ext, &idx);
*hf_idx = hf_sgsap_msg_type;
if (*msg_str != NULL) {
*ett_tree = ett_sgsap_msg[idx];
*msg_fcn_p = sgsap_msg_fcn[idx];
}
return;
}
static int
dissect_sgsap(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
proto_item *item;
proto_tree *sgsap_tree;
int offset = 0;
guint32 len;
const gchar *msg_str;
gint ett_tree;
int hf_idx;
void (*msg_fcn_p)(tvbuff_t *tvb, proto_tree *tree, packet_info *pinfo, guint32 offset, guint len);
guint8 oct;
len = tvb_reported_length(tvb);
/* Make entry in the Protocol column on summary display */
col_set_str(pinfo->cinfo, COL_PROTOCOL, PSNAME);
item = proto_tree_add_item(tree, proto_sgsap, tvb, 0, -1, ENC_NA);
sgsap_tree = proto_item_add_subtree(item, ett_sgsap);
/* Messge type IE*/
oct = tvb_get_guint8(tvb, offset);
msg_fcn_p = NULL;
ett_tree = -1;
hf_idx = -1;
msg_str = NULL;
get_sgsap_msg_params(oct, &msg_str, &ett_tree, &hf_idx, &msg_fcn_p);
if (msg_str) {
col_add_fstr(pinfo->cinfo, COL_INFO, "%s", msg_str);
}else{
proto_tree_add_item(tree, hf_sgsap_unknown_msg, tvb, offset, 1, ENC_BIG_ENDIAN);
return tvb_captured_length(tvb);
}
/*
* Add SGSAP message name
*/
proto_tree_add_item(sgsap_tree, hf_idx, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
/*
* decode elements
*/
if (msg_fcn_p == NULL)
{
proto_tree_add_item(sgsap_tree, hf_sgsap_message_elements, tvb, offset, len - offset, ENC_NA);
}
else
{
(*msg_fcn_p)(tvb, sgsap_tree, pinfo, offset, len - offset);
}
return tvb_captured_length(tvb);
}
void proto_register_sgsap(void) {
guint i;
guint last_offset;
/* List of fields */
static hf_register_info hf[] = {
{ &hf_sgsap_msg_type,
{ "SGSAP Message Type", "sgsap.msg_type",
FT_UINT8, BASE_HEX|BASE_EXT_STRING, &sgsap_msg_strings_ext, 0x0,
NULL, HFILL }
},
{ &hf_sgsap_elem_id,
{ "Element ID", "sgsap.elem_id",
FT_UINT8, BASE_HEX, NULL, 0x0,
NULL, HFILL }
},
{ &hf_sgsap_eps_location_update_type,
{ "EPS location update type", "sgsap.eps_location_update_type",
FT_UINT8, BASE_DEC, VALS(sgsap_eps_location_update_type_values), 0x0,
NULL, HFILL }
},
{ &hf_sgsap_service_indicator_value,
{ "Service indicator", "sgsap.service_indicator",
FT_UINT8, BASE_DEC, VALS(sgsap_service_indicator_values), 0x0,
NULL, HFILL }
},
{ &hf_sgsap_sgs_cause,
{ "SGs cause", "sgsap.sgs_cause",
FT_UINT8, BASE_DEC|BASE_EXT_STRING, &sgsap_sgs_cause_values_ext, 0x0,
NULL, HFILL }
},
{ &hf_sgsap_ue_emm_mode,
{ "UE EMM mode", "sgsap.ue_emm_mode",
FT_UINT8, BASE_DEC, VALS(sgsap_ue_emm_mode_values), 0x0,
NULL, HFILL }
},
{ &hf_sgsap_eci,
{"ECI (E-UTRAN Cell Identifier)", "sgsap.eci",
FT_UINT32, BASE_DEC, NULL, 0x0fffffff,
NULL, HFILL}
},
{ &hf_sgsap_cn_id,
{"CN_ID", "sgsap.cn_id",
FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL}
},
{ &hf_sgsap_imsi_det_eps,
{ "IMSI detach from EPS service type", "sgsap.imsi_det_eps",
FT_UINT8, BASE_DEC, VALS(sgsap_imsi_det_from_eps_serv_type_values), 0x0,
NULL, HFILL }
},
{ &hf_sgsap_imsi_det_non_eps,
{ "IMSI detach from non-EPS service type", "sgsap.imsi_det_non_eps",
FT_UINT8, BASE_DEC, VALS(sgsap_imsi_det_from_non_eps_serv_type_values), 0x0,
NULL, HFILL }
},
{ &hf_sgsap_lcs_indic,
{ "LCS indicator", "sgsap.lcs_indicator",
FT_UINT8, BASE_DEC, VALS(sgsap_lcs_indic_values), 0x0,
NULL, HFILL }
},
{ &hf_sgsap_mme_name,
{"MME name", "sgsap.mme_name",
FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL}
},
{ &hf_sgsap_vlr_name,
{"VLR name", "sgsap.vlr_name",
FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL}
},
{ &hf_sgsap_imeisv,
{"IMEISV", "sgsap.imeisv",
FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL}
},
{ &hf_sgsap_unknown_msg,
{ "Unknown message", "sgsap.unknown_msg",
FT_UINT8, BASE_HEX, NULL, 0x0,
NULL, HFILL }
},
{ &hf_sgsap_message_elements,
{"Message Elements", "sgsap.message_elements",
FT_BYTES, BASE_NONE, NULL, 0x0,
NULL, HFILL}
},
{ &hf_sgsap_csri,
{"CS restoration indicator (CSRI)", "sgsap.csri",
FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x01,
NULL, HFILL }
},
{ &hf_sgsap_sel_cs_dmn_op,
{ "Selected CS domain operator", "sgsap.sel_cs_dmn_op",
FT_BYTES, BASE_NONE, NULL, 0x0,
NULL, HFILL }
},
};
static ei_register_info ei[] = {
{ &ei_sgsap_extraneous_data, { "sgsap.extraneous_data", PI_PROTOCOL, PI_NOTE, "Extraneous Data, dissector bug or later version spec(report to wireshark.org)", EXPFILL }},
{ &ei_sgsap_missing_mandatory_element, { "sgsap.missing_mandatory_element", PI_PROTOCOL, PI_WARN, "Missing Mandatory element, rest of dissection is suspect", EXPFILL }},
};
expert_module_t* expert_sgsap;
/* Setup protocol subtree array */
#define NUM_INDIVIDUAL_ELEMS 2
gint *ett[NUM_INDIVIDUAL_ELEMS +
NUM_SGSAP_ELEM +
NUM_SGSAP_MSG];
ett[0] = &ett_sgsap;
ett[1] = &ett_sgsap_sel_cs_dmn_op;
last_offset = NUM_INDIVIDUAL_ELEMS;
for (i=0; i < NUM_SGSAP_ELEM; i++, last_offset++)
{
ett_sgsap_elem[i] = -1;
ett[last_offset] = &ett_sgsap_elem[i];
}
for (i=0; i < NUM_SGSAP_MSG; i++, last_offset++)
{
ett_sgsap_msg[i] = -1;
ett[last_offset] = &ett_sgsap_msg[i];
}
/* Register protocol */
proto_sgsap = proto_register_protocol(PNAME, PSNAME, PFNAME);
/* Register fields and subtrees */
proto_register_field_array(proto_sgsap, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
expert_sgsap = expert_register_protocol(proto_sgsap);
expert_register_field_array(expert_sgsap, ei, array_length(ei));
/* Register dissector */
sgsap_handle = register_dissector(PFNAME, dissect_sgsap, proto_sgsap);
/* sgsap_module = prefs_register_protocol(proto_sgsap, NULL); */
}
void
proto_reg_handoff_sgsap(void)
{
/* The registered SCTP port number for SGsAP is 29118.
* The payload protocol identifier to be used for SGsAP is 0.
*/
gsm_a_dtap_handle = find_dissector_add_dependency("gsm_a_dtap", proto_sgsap);
dissector_add_uint_range_with_preference("sctp.port", SGSAP_SCTP_PORT_RANGE, sgsap_handle);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* vi: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
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