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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-10 20:34:10 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-10 20:34:10 +0000 |
commit | e4ba6dbc3f1e76890b22773807ea37fe8fa2b1bc (patch) | |
tree | 68cb5ef9081156392f1dd62a00c6ccc1451b93df /epan/dissectors/packet-sgsap.c | |
parent | Initial commit. (diff) | |
download | wireshark-e4ba6dbc3f1e76890b22773807ea37fe8fa2b1bc.tar.xz wireshark-e4ba6dbc3f1e76890b22773807ea37fe8fa2b1bc.zip |
Adding upstream version 4.2.2.upstream/4.2.2
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'epan/dissectors/packet-sgsap.c')
-rw-r--r-- | epan/dissectors/packet-sgsap.c | 1733 |
1 files changed, 1733 insertions, 0 deletions
diff --git a/epan/dissectors/packet-sgsap.c b/epan/dissectors/packet-sgsap.c new file mode 100644 index 0000000..71f52ea --- /dev/null +++ b/epan/dissectors/packet-sgsap.c @@ -0,0 +1,1733 @@ +/* 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: + */ |