| /* (C) 2018 by sysmocom s.f.m.c. GmbH |
| * All Rights Reserved |
| * |
| * Author: Harald Welte, Philipp Maier |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write to the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| */ |
| |
| #include <osmocom/core/utils.h> |
| #include <osmocom/gsm/tlv.h> |
| |
| #include <osmocom/gsm/protocol/gsm_29_118.h> |
| #include <osmocom/gsm/gsm29118.h> |
| #include <osmocom/gsm/apn.h> |
| #include <osmocom/gsm/gsm48.h> |
| |
| const struct value_string sgsap_msg_type_names[] = { |
| { SGSAP_MSGT_PAGING_REQ, "PAGING-REQUEST" }, |
| { SGSAP_MSGT_PAGING_REJ, "PAGING-REJECT" }, |
| { SGSAP_MSGT_SERVICE_REQ, "SERVICE-REQUEST" }, |
| { SGSAP_MSGT_DL_UD, "DOWNLINK-UNITDATA" }, |
| { SGSAP_MSGT_UL_UD, "UPLINK-UNITDATA" }, |
| { SGSAP_MSGT_LOC_UPD_REQ, "LOCATION-UPDATE-REQUEST" }, |
| { SGSAP_MSGT_LOC_UPD_ACK, "LOCATION-UPDATE-ACCEPT" }, |
| { SGSAP_MSGT_LOC_UPD_REJ, "LOCATION-UPDATE-REJECT" }, |
| { SGSAP_MSGT_TMSI_REALL_CMPL, "TMSI-REALLOCATION-COMPLETE" }, |
| { SGSAP_MSGT_ALERT_REQ, "ALERT-REQQUEST" }, |
| { SGSAP_MSGT_ALERT_ACK, "ALERT-ACK" }, |
| { SGSAP_MSGT_ALERT_REJ, "ALERT-REJECT" }, |
| { SGSAP_MSGT_UE_ACT_IND, "UE-ACTIVITY-INDICATION" }, |
| { SGSAP_MSGT_EPS_DET_IND, "EPS-DETACH-INDICATION" }, |
| { SGSAP_MSGT_EPS_DET_ACK, "EPS-DETACH-ACK" }, |
| { SGSAP_MSGT_IMSI_DET_IND, "IMSI-DETACH-INDICATION" }, |
| { SGSAP_MSGT_IMSI_DET_ACK, "IMSI-DETACH-ACK" }, |
| { SGSAP_MSGT_RESET_IND, "RESET-INDICATION" }, |
| { SGSAP_MSGT_RESET_ACK, "RESET-ACK" }, |
| { SGSAP_MSGT_SERVICE_ABORT_REQ, "SERVICE-ABORT-REQUEST" }, |
| { SGSAP_MSGT_MO_CSFB_IND, "MO-CSFB-INDICATION" }, |
| { SGSAP_MSGT_MM_INFO_REQ, "MM-INFO-REQUEST" }, |
| { SGSAP_MSGT_RELEASE_REQ, "RELEASE-REQUEST" }, |
| { SGSAP_MSGT_STATUS, "STATUS" }, |
| { SGSAP_MSGT_UE_UNREACHABLE, "UE-UNREACHABLE" }, |
| { 0, NULL } |
| }; |
| |
| const struct value_string sgsap_iei_names[] = { |
| { SGSAP_IE_IMSI, "IMSI" }, |
| { SGSAP_IE_VLR_NAME, "VLR-NAME" }, |
| { SGSAP_IE_TMSI, "TMSI" }, |
| { SGSAP_IE_LAI, "LAI" }, |
| { SGSAP_IE_CHAN_NEEDED, "CHAN-NEEDED" }, |
| { SGSAP_IE_EMLPP_PRIORITY, "EMLPP-PRIORITY" }, |
| { SGSAP_IE_TMSI_STATUS, "TMSI-STATUS" }, |
| { SGSAP_IE_SGS_CAUSE, "SGS-CAUSE" }, |
| { SGSAP_IE_MME_NAME, "MME-NAME" }, |
| { SGSAP_IE_EPS_LU_TYPE, "EPS-LU-TYPE" }, |
| { SGSAP_IE_GLOBAL_CN_ID, "GLOBAL-CN-ID" }, |
| { SGSAP_IE_MOBILE_ID, "MOBILE-ID" }, |
| { SGSAP_IE_REJECT_CAUSE, "REJECT-CAUSE" }, |
| { SGSAP_IE_IMSI_DET_EPS_TYPE, "IMSI-DET-EPS-TYPE" }, |
| { SGSAP_IE_IMSI_DET_NONEPS_TYPE, "IMSI-DET-NONEPS-TYPE" }, |
| { SGSAP_IE_IMEISV, "IMEISV" }, |
| { SGSAP_IE_NAS_MSG_CONTAINER, "NAS-MSG-CONTAINER" }, |
| { SGSAP_IE_MM_INFO, "MM-INFO" }, |
| { SGSAP_IE_ERR_MSG, "ERR-MSG" }, |
| { SGSAP_IE_CLI, "CLI" }, |
| { SGSAP_IE_LCS_CLIENT_ID, "LCS-CLIENT-ID" }, |
| { SGSAP_IE_LCS_INDICATOR, "LCS-INDICATOR" }, |
| { SGSAP_IE_SS_CODE, "SS-CODE" }, |
| { SGSAP_IE_SERVICE_INDICATOR, "SERVICE-INDICATOR" }, |
| { SGSAP_IE_UE_TIMEZONE, "UE-TIMEZONE" }, |
| { SGSAP_IE_MS_CLASSMARK2, "MS-CLASSMARK2" }, |
| { SGSAP_IE_TAI, "TAI" }, |
| { SGSAP_IE_EUTRAN_CGI, "EUTRAN-CGI" }, |
| { SGSAP_IE_UE_EMM_MODE, "UE-EMM-MODE" }, |
| { SGSAP_IE_ADDL_PAGING_INDICATORS, "ADDL-PAGING-INDICATORS" }, |
| { SGSAP_IE_TMSI_BASED_NRI_CONT, "TMSI-BASED-NRI-CONT" }, |
| { SGSAP_IE_MO_FALLBACK_VALUE, "MO-FALLBACK-VALUE" }, |
| { 0, NULL } |
| }; |
| |
| const struct value_string sgsap_eps_lu_type_names[] = { |
| { SGSAP_EPS_LUT_IMSI_ATTACH, "IMSI Attach" }, |
| { SGSAP_EPS_LUT_NORMAL, "Normal" }, |
| { 0, NULL } |
| }; |
| |
| const struct value_string sgsap_ismi_det_eps_type_names[] = { |
| { SGSAP_ID_EPS_T_NETWORK_INITIATED, "Network initiated IMSI detach from EPS" }, |
| { SGSAP_ID_EPS_T_UE_INITIATED, "UE initiated IMSI detach from EPS" }, |
| { SGSAP_ID_EPS_T_EPS_NOT_ALLOWED, "EPS not allowed" }, |
| { 0, NULL } |
| }; |
| |
| const struct value_string sgsap_ismi_det_noneps_type_names[] = { |
| { SGSAP_ID_NONEPS_T_EXPLICIT_UE_NONEPS, |
| "Explicit UE initiated IMSI detach from non-EPS" }, |
| { SGSAP_ID_NONEPS_T_COMBINED_UE_EPS_NONEPS, |
| "Combined UE initiated IMSI detach from EPS and non-EPS" }, |
| { SGSAP_ID_NONEPS_T_IMPLICIT_UE_EPS_NONEPS, |
| "Implicit network initiated IMSI detach from EPS and non-EPS" }, |
| { 0, NULL } |
| }; |
| |
| const struct value_string sgsap_service_ind_names[] = { |
| { SGSAP_SERV_IND_CS_CALL, "CS Call" }, |
| { SGSAP_SERV_IND_SMS, "SMS" }, |
| { 0, NULL } |
| }; |
| |
| const struct value_string sgsap_sgs_cause_names[] = { |
| { SGSAP_SGS_CAUSE_IMSI_DET_EPS, "IMSI detached for EPS" }, |
| { SGSAP_SGS_CAUSE_IMSI_DET_EPS_NONEPS, "IMSI detached for EPS and non-EPS" }, |
| { SGSAP_SGS_CAUSE_IMSI_UNKNOWN, "IMSI unknown" }, |
| { SGSAP_SGS_CAUSE_IMSI_DET_NON_EPS, "IMSI detached for non-EPS" }, |
| { SGSAP_SGS_CAUSE_IMSI_IMPL_DET_NON_EPS,"IMSI implicitly detached for non-EPS" }, |
| { SGSAP_SGS_CAUSE_UE_UNREACHABLE, "UE unreachable" }, |
| { SGSAP_SGS_CAUSE_MSG_INCOMP_STATE, "Message not compatible with protocol state" }, |
| { SGSAP_SGS_CAUSE_MISSING_MAND_IE, "Missing mandatory IE" }, |
| { SGSAP_SGS_CAUSE_INVALID_MAND_IE, "Invalid mandatory IE" }, |
| { SGSAP_SGS_CAUSE_COND_IE_ERROR, "Conditional IE error" }, |
| { SGSAP_SGS_CAUSE_SEMANT_INCORR_MSG, "Semantically incorrect message" }, |
| { SGSAP_SGS_CAUSE_MSG_UNKNOWN, "Message unknown" }, |
| { SGSAP_SGS_CAUSE_MT_CSFB_REJ_USER, "MT CSFB call rejected by user" }, |
| { SGSAP_SGS_CAUSE_UE_TEMP_UNREACHABLE, "UE temporarily unreachable" }, |
| { 0, NULL } |
| }; |
| |
| |
| const struct value_string sgsap_ue_emm_mode_names[] = { |
| { SGSAP_UE_EMM_MODE_IDLE, "EMM-IDLE" }, |
| { SGSAP_UE_EMM_MODE_CONNECTED, "EMM-CONNECTED" }, |
| { 0, NULL } |
| }; |
| |
| const struct tlv_definition sgsap_ie_tlvdef = { |
| .def = { |
| [SGSAP_IE_IMSI] = { TLV_TYPE_TLV }, |
| [SGSAP_IE_VLR_NAME] = { TLV_TYPE_TLV }, |
| [SGSAP_IE_TMSI] = { TLV_TYPE_TLV }, |
| [SGSAP_IE_LAI] = { TLV_TYPE_TLV }, |
| [SGSAP_IE_CHAN_NEEDED] = { TLV_TYPE_TLV }, |
| [SGSAP_IE_EMLPP_PRIORITY] = { TLV_TYPE_TLV }, |
| [SGSAP_IE_TMSI_STATUS] = { TLV_TYPE_TLV }, |
| [SGSAP_IE_SGS_CAUSE] = { TLV_TYPE_TLV }, |
| [SGSAP_IE_MME_NAME] = { TLV_TYPE_TLV }, |
| [SGSAP_IE_EPS_LU_TYPE] = { TLV_TYPE_TLV }, |
| [SGSAP_IE_GLOBAL_CN_ID] = { TLV_TYPE_TLV }, |
| [SGSAP_IE_MOBILE_ID] = { TLV_TYPE_TLV }, |
| [SGSAP_IE_REJECT_CAUSE] = { TLV_TYPE_TLV }, |
| [SGSAP_IE_IMSI_DET_EPS_TYPE] = { TLV_TYPE_TLV }, |
| [SGSAP_IE_IMSI_DET_NONEPS_TYPE] = { TLV_TYPE_TLV }, |
| [SGSAP_IE_IMEISV] = { TLV_TYPE_TLV }, |
| [SGSAP_IE_NAS_MSG_CONTAINER] = { TLV_TYPE_TLV }, |
| [SGSAP_IE_MM_INFO] = { TLV_TYPE_TLV }, |
| [SGSAP_IE_ERR_MSG] = { TLV_TYPE_TLV }, |
| [SGSAP_IE_CLI] = { TLV_TYPE_TLV }, |
| [SGSAP_IE_LCS_CLIENT_ID] = { TLV_TYPE_TLV }, |
| [SGSAP_IE_LCS_INDICATOR] = { TLV_TYPE_TLV }, |
| [SGSAP_IE_SS_CODE] = { TLV_TYPE_TLV }, |
| [SGSAP_IE_SERVICE_INDICATOR] = { TLV_TYPE_TLV }, |
| [SGSAP_IE_UE_TIMEZONE] = { TLV_TYPE_TLV }, |
| [SGSAP_IE_MS_CLASSMARK2] = { TLV_TYPE_TLV }, |
| [SGSAP_IE_TAI] = { TLV_TYPE_TLV }, |
| [SGSAP_IE_EUTRAN_CGI] = { TLV_TYPE_TLV }, |
| [SGSAP_IE_UE_EMM_MODE] = { TLV_TYPE_TLV }, |
| [SGSAP_IE_ADDL_PAGING_INDICATORS]={ TLV_TYPE_TLV }, |
| [SGSAP_IE_TMSI_BASED_NRI_CONT] = { TLV_TYPE_TLV }, |
| [SGSAP_IE_MO_FALLBACK_VALUE] = { TLV_TYPE_TLV }, |
| }, |
| }; |
| |
| |
| /* Allocate an empty message buffer, suitable to hold a complete SGsAP msg. */ |
| struct msgb *gsm29118_msgb_alloc(void) |
| { |
| /* by far sufficient for the maximum size message of 298 bytes |
| * (9+7+5+3+10+253+10+1) SGsAP-UP-UD */ |
| return msgb_alloc_headroom(1024, 512, "SGsAP"); |
| } |
| |
| /* Encode VLR/MME name from string and append to SGsAP msg */ |
| static int msgb_sgsap_name_put(struct msgb *msg, enum sgsap_iei iei, const char *name) |
| { |
| uint8_t buf[APN_MAXLEN]; |
| uint8_t len; |
| int rc; |
| |
| /* encoding is like DNS names, which is like APN fields */ |
| memset(buf, 0, sizeof(buf)); |
| rc = osmo_apn_from_str(buf, sizeof(buf), name); |
| if (rc < 0) |
| return -1; |
| len = (uint8_t)rc; |
| |
| /* Note: While the VLR-Name (see 3GPP TS 29.118, chapter 9.4.22) has |
| * a flexible length, the MME-Name has a fixed size of 55 octets. (see |
| * 3GPP TS 29.118, chapter 9.4.13). */ |
| if (iei == SGSAP_IE_MME_NAME && len != SGS_MME_NAME_LEN) |
| return -1; |
| msgb_tlv_put(msg, iei, len, buf); |
| return 0; |
| } |
| |
| /* Encode IMSI from string representation and append to SGSaAP msg */ |
| static void msgb_sgsap_imsi_put(struct msgb *msg, const char *imsi) |
| { |
| uint8_t buf[16]; |
| uint8_t len; |
| /* encoding is just like TS 04.08 */ |
| len = gsm48_generate_mid_from_imsi(buf, imsi); |
| /* skip first two bytes (tag+length) so we can use msgb_tlv_put */ |
| msgb_tlv_put(msg, SGSAP_IE_IMSI, len - 2, buf + 2); |
| } |
| |
| /* Encode LAI from struct representation and append to SGSaAP msg */ |
| static void msgb_sgsap_lai_put(struct msgb *msg, const struct osmo_location_area_id *lai) |
| { |
| struct gsm48_loc_area_id lai_enc; |
| gsm48_generate_lai2(&lai_enc, lai); |
| msgb_tlv_put(msg, SGSAP_IE_LAI, sizeof(lai_enc), (uint8_t *) & lai_enc); |
| } |
| |
| /* Many messages consist only of a message type and an imsi */ |
| static struct msgb *create_simple_msg(enum sgsap_msg_type msg_type, const char *imsi) |
| { |
| struct msgb *msg = gsm29118_msgb_alloc(); |
| msgb_sgsap_imsi_put(msg, imsi); |
| msgb_push_u8(msg, msg_type); |
| return msg; |
| } |
| |
| /* 8.3 SGsAP-ALERT-REQUEST. |
| * \param[in] imsi IMSI of the subscriber. |
| * \returns callee-allocated msgb with the encoded message.*/ |
| struct msgb *gsm29118_create_alert_req(const char *imsi) |
| { |
| return create_simple_msg(SGSAP_MSGT_ALERT_REQ, imsi); |
| } |
| |
| /* 8.4 SGsAP-DOWNLINK-UNITDATA. |
| * \param[in] imsi IMSI of the subscriber. |
| * \param[in] nas_msg user provided message buffer with L3 message. |
| * \returns callee-allocated msgb with the encoded message. */ |
| struct msgb *gsm29118_create_dl_ud(const char *imsi, struct msgb *nas_msg) |
| { |
| struct msgb *msg = gsm29118_msgb_alloc(); |
| msgb_sgsap_imsi_put(msg, imsi); |
| msgb_tlv_put(msg, SGSAP_IE_NAS_MSG_CONTAINER, nas_msg->len, nas_msg->data); |
| msgb_push_u8(msg, SGSAP_MSGT_DL_UD); |
| return msg; |
| } |
| |
| /* 8.5 SGsAP-EPS-DETACH-ACK. |
| * \param[in] imsi IMSI of the subscriber. |
| * \returns callee-allocated msgb with the encoded message. */ |
| struct msgb *gsm29118_create_eps_det_ack(const char *imsi) |
| { |
| return create_simple_msg(SGSAP_MSGT_EPS_DET_ACK, imsi); |
| } |
| |
| /* 8.7 SGsAP-IMSI-DETACH-ACK. |
| * \param[in] imsi IMSI of the subscriber. |
| * \returns callee-allocated msgb with the encoded message. */ |
| struct msgb *gsm29118_create_imsi_det_ack(const char *imsi) |
| { |
| return create_simple_msg(SGSAP_MSGT_IMSI_DET_ACK, imsi); |
| } |
| |
| /*! 8.9 SGsAP-LOCATION-UPDATE-ACCEPT. |
| * \param[in] imsi IMSI of the subscriber. |
| * \param[in] lai Location Area Identity (optional, may be NULL). |
| * \param[in] new_id value part of new Mobile Identity (optional, may be NULL). |
| * \param[in] new_id_len length of \a new_id in octets. |
| * \returns callee-allocated msgb with the encoded message */ |
| struct msgb *gsm29118_create_lu_ack(const char *imsi, const struct osmo_location_area_id *lai, const uint8_t *new_id, |
| unsigned int new_id_len) |
| { |
| struct msgb *msg = gsm29118_msgb_alloc(); |
| msgb_sgsap_imsi_put(msg, imsi); |
| msgb_sgsap_lai_put(msg, lai); |
| if (new_id && new_id_len) |
| msgb_tlv_put(msg, SGSAP_IE_MOBILE_ID, new_id_len, new_id); |
| msgb_push_u8(msg, SGSAP_MSGT_LOC_UPD_ACK); |
| return msg; |
| } |
| |
| /* 8.10 SGsAP-LOCATION-UPDATE-REJECT. |
| * \param[in] imsi IMSI of the subscriber. |
| * \param[in] rej_cause LU cause code, see also 3GPP TS 29.018, subclause 18.4.21. |
| * \param[in] lai location area identifier. |
| * \returns callee-allocated msgb with the encoded message */ |
| struct msgb *gsm29118_create_lu_rej(const char *imsi, uint8_t rej_cause, const struct osmo_location_area_id *lai) |
| { |
| struct msgb *msg = gsm29118_msgb_alloc(); |
| msgb_sgsap_imsi_put(msg, imsi); |
| msgb_tlv_put(msg, SGSAP_IE_REJECT_CAUSE, 1, &rej_cause); |
| if (lai) |
| msgb_sgsap_lai_put(msg, lai); |
| msgb_push_u8(msg, SGSAP_MSGT_LOC_UPD_REJ); |
| return msg; |
| } |
| |
| /* 8.12 SGsAP-MM-INFORMATION-REQUEST. |
| * \param[in] imsi IMSI of the subscriber. |
| * \param[in] mm_info MM information, see also 3GPP TS 29.018, subclause 18.4.16. |
| * \param[in] mm_info_len length of \a mm_info in octets. |
| * \returns callee-allocated msgb with the encoded message. */ |
| struct msgb *gsm29118_create_mm_info_req(const char *imsi, const uint8_t *mm_info, uint8_t mm_info_len) |
| { |
| struct msgb *msg = gsm29118_msgb_alloc(); |
| msgb_sgsap_imsi_put(msg, imsi); |
| msgb_tlv_put(msg, SGSAP_IE_MM_INFO, mm_info_len, mm_info); |
| msgb_push_u8(msg, SGSAP_MSGT_MM_INFO_REQ); |
| return msg; |
| } |
| |
| /* 8.14 SGsAP-PAGING-REQUEST. |
| * \param[in] params user provided memory with message contents to encode. |
| * \returns callee-allocated msgb with the encoded message or NULL on error. */ |
| struct msgb *gsm29118_create_paging_req(struct gsm29118_paging_req *params) |
| { |
| int rc; |
| struct msgb *msg = gsm29118_msgb_alloc(); |
| msgb_sgsap_imsi_put(msg, params->imsi); |
| rc = msgb_sgsap_name_put(msg, SGSAP_IE_VLR_NAME, params->vlr_name); |
| if (rc < 0) |
| goto error; |
| msgb_tlv_put(msg, SGSAP_IE_SERVICE_INDICATOR, 1, ¶ms->serv_ind); |
| if (params->lai_present) |
| msgb_sgsap_lai_put(msg, ¶ms->lai); |
| msgb_push_u8(msg, SGSAP_MSGT_PAGING_REQ); |
| return msg; |
| error: |
| msgb_free(msg); |
| return NULL; |
| } |
| |
| /* 8.15 SGsAP-RESET-ACK. |
| * \param[in] params user provided memory with message contents to encode. |
| * \returns callee-allocated msgb with the encoded message or NULL on error. */ |
| struct msgb *gsm29118_create_reset_ack(struct gsm29118_reset_msg *params) |
| { |
| int rc; |
| struct msgb *msg = gsm29118_msgb_alloc(); |
| if (params->vlr_name_present && params->mme_name_present == false) |
| rc = msgb_sgsap_name_put(msg, SGSAP_IE_VLR_NAME, params->vlr_name); |
| else if (params->mme_name_present && params->vlr_name_present == false) |
| rc = msgb_sgsap_name_put(msg, SGSAP_IE_MME_NAME, params->mme_name); |
| else |
| goto error; |
| if (rc < 0) |
| goto error; |
| msgb_push_u8(msg, SGSAP_MSGT_RESET_ACK); |
| return msg; |
| error: |
| msgb_free(msg); |
| return NULL; |
| } |
| |
| /* 8.16 SGsAP-RESET-INDICATION. |
| * \param[in] params user provided memory with message contents to encode. |
| * \returns callee-allocated msgb with the encoded message or NULL on error. */ |
| struct msgb *gsm29118_create_reset_ind(struct gsm29118_reset_msg *params) |
| { |
| int rc; |
| struct msgb *msg = gsm29118_msgb_alloc(); |
| if (params->vlr_name_present && params->mme_name_present == false) |
| rc = msgb_sgsap_name_put(msg, SGSAP_IE_VLR_NAME, params->vlr_name); |
| else if (params->mme_name_present && params->vlr_name_present == false) |
| rc = msgb_sgsap_name_put(msg, SGSAP_IE_MME_NAME, params->mme_name); |
| else |
| goto error; |
| if (rc < 0) |
| goto error; |
| msgb_push_u8(msg, SGSAP_MSGT_RESET_IND); |
| return msg; |
| error: |
| msgb_free(msg); |
| return NULL; |
| } |
| |
| /* 8.18 SGsAP-STATUS. |
| * \param[in] imsi IMSI of the subscriber. |
| * \param[in] cause sgs related cause code. |
| * \param[in] err_msg user provided message buffer containing the errornous message. |
| * \returns callee-allocated msgb with the encoded message */ |
| struct msgb *gsm29118_create_status(const char *imsi, enum sgsap_sgs_cause cause, const struct msgb *err_msg) |
| { |
| struct msgb *msg = gsm29118_msgb_alloc(); |
| uint8_t c8 = cause; |
| unsigned int err_msg_len; |
| msgb_tlv_put(msg, SGSAP_IE_SGS_CAUSE, 1, &c8); |
| if (imsi) |
| msgb_sgsap_imsi_put(msg, imsi); |
| if (err_msg) { |
| err_msg_len = msgb_l2len(err_msg); |
| if (err_msg_len > 255) |
| err_msg_len = 255; |
| msgb_tlv_put(msg, SGSAP_IE_ERR_MSG, err_msg_len, msgb_l2(err_msg)); |
| } |
| msgb_push_u8(msg, SGSAP_MSGT_STATUS); |
| return msg; |
| } |
| |
| /* 8.23 SGsAP-RELEASE-REQUEST. |
| * \param[in] imsi IMSI of the subscriber. |
| * \param[in] cause sgs related cause code. |
| * \returns callee-allocated msgb with the encoded message. */ |
| struct msgb *gsm29118_create_release_req(const char *imsi, const uint8_t sgs_cause) |
| { |
| struct msgb *msg = gsm29118_msgb_alloc(); |
| msgb_sgsap_imsi_put(msg, imsi); |
| if (sgs_cause) |
| msgb_tlv_put(msg, SGSAP_IE_SGS_CAUSE, 1, &sgs_cause); |
| msgb_push_u8(msg, SGSAP_MSGT_RELEASE_REQ); |
| return msg; |
| } |
| |
| /* 8.24 SGsAP-SERVICE-ABORT-REQUEST. |
| * \param[in] imsi IMSI of the subscriber. |
| * \returns callee-allocated msgb with the encoded message. */ |
| struct msgb *gsm29118_create_service_abort_req(const char *imsi) |
| { |
| return create_simple_msg(SGSAP_MSGT_SERVICE_ABORT_REQ, imsi); |
| } |