| /* GSM Mobile Radio Interface Layer 3 messages on the A-bis interface |
| * 3GPP TS 04.08 version 7.21.0 Release 1998 / ETSI TS 100 940 V7.21.0 */ |
| |
| /* (C) 2008-2016 by Harald Welte <laforge@gnumonks.org> |
| * (C) 2008-2012 by Holger Hans Peter Freyther <zecke@selfish.org> |
| * |
| * All Rights Reserved |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU Affero General Public License as published by |
| * the Free Software Foundation; either version 3 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 Affero General Public License for more details. |
| * |
| * You should have received a copy of the GNU Affero General Public License |
| * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| * |
| */ |
| |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <stdbool.h> |
| #include <errno.h> |
| #include <time.h> |
| #include <netinet/in.h> |
| #include <regex.h> |
| #include <sys/types.h> |
| #include <openssl/rand.h> |
| |
| #include "bscconfig.h" |
| |
| #include <openbsc/auth.h> |
| #include <openbsc/db.h> |
| #include <openbsc/debug.h> |
| #include <openbsc/gsm_data.h> |
| #include <openbsc/gsm_subscriber.h> |
| #include <openbsc/gsm_04_11.h> |
| #include <openbsc/gsm_04_08.h> |
| #include <openbsc/gsm_04_80.h> |
| #include <openbsc/gsm_04_14.h> |
| #include <openbsc/abis_rsl.h> |
| #include <openbsc/chan_alloc.h> |
| #include <openbsc/paging.h> |
| #include <openbsc/signal.h> |
| #include <osmocom/abis/trau_frame.h> |
| #include <openbsc/trau_mux.h> |
| #include <openbsc/rtp_proxy.h> |
| #include <openbsc/transaction.h> |
| #include <openbsc/ussd.h> |
| #include <openbsc/silent_call.h> |
| #include <openbsc/bsc_api.h> |
| #include <openbsc/osmo_msc.h> |
| #include <openbsc/handover.h> |
| #include <openbsc/mncc_int.h> |
| #include <osmocom/abis/e1_input.h> |
| #include <osmocom/core/bitvec.h> |
| #include <openbsc/vlr.h> |
| #include <openbsc/msc_ifaces.h> |
| |
| #include <osmocom/gsm/gsm48.h> |
| #include <osmocom/gsm/gsm0480.h> |
| #include <osmocom/gsm/gsm_utils.h> |
| #include <osmocom/gsm/protocol/gsm_04_08.h> |
| #include <osmocom/core/msgb.h> |
| #include <osmocom/core/talloc.h> |
| #include <osmocom/core/utils.h> |
| #include <osmocom/gsm/tlv.h> |
| #include <osmocom/crypt/auth.h> |
| |
| #include <openbsc/msc_ifaces.h> |
| |
| #ifdef BUILD_IU |
| #include <openbsc/iu.h> |
| #endif |
| |
| #include <openbsc/a_iface.h> |
| |
| #include <assert.h> |
| |
| |
| void *tall_locop_ctx; |
| void *tall_authciphop_ctx; |
| |
| static int gsm0408_loc_upd_acc(struct gsm_subscriber_connection *conn, |
| uint32_t send_tmsi); |
| static int gsm48_tx_simple(struct gsm_subscriber_connection *conn, |
| uint8_t pdisc, uint8_t msg_type); |
| |
| struct gsm_lai { |
| uint16_t mcc; |
| uint16_t mnc; |
| uint16_t lac; |
| }; |
| |
| static uint32_t new_callref = 0x80000001; |
| |
| void cc_tx_to_mncc(struct gsm_network *net, struct msgb *msg) |
| { |
| net->mncc_recv(net, msg); |
| } |
| |
| static int gsm48_conn_sendmsg(struct msgb *msg, struct gsm_subscriber_connection *conn, |
| struct gsm_trans *trans) |
| { |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msg->data; |
| |
| /* if we get passed a transaction reference, do some common |
| * work that the caller no longer has to do */ |
| if (trans) { |
| gh->proto_discr = trans->protocol | (trans->transaction_id << 4); |
| } |
| |
| return msc_tx_dtap(conn, msg); |
| } |
| |
| int gsm48_cc_tx_notify_ss(struct gsm_trans *trans, const char *message) |
| { |
| struct gsm48_hdr *gh; |
| struct msgb *ss_notify; |
| |
| ss_notify = gsm0480_create_notifySS(message); |
| if (!ss_notify) |
| return -1; |
| |
| gsm0480_wrap_invoke(ss_notify, GSM0480_OP_CODE_NOTIFY_SS, 0); |
| uint8_t *data = msgb_push(ss_notify, 1); |
| data[0] = ss_notify->len - 1; |
| gh = (struct gsm48_hdr *) msgb_push(ss_notify, sizeof(*gh)); |
| gh->msg_type = GSM48_MT_CC_FACILITY; |
| return gsm48_conn_sendmsg(ss_notify, trans->conn, trans); |
| } |
| |
| /* clear all transactions globally; used in case of MNCC socket disconnect */ |
| void gsm0408_clear_all_trans(struct gsm_network *net, int protocol) |
| { |
| struct gsm_trans *trans, *temp; |
| |
| LOGP(DCC, LOGL_NOTICE, "Clearing all currently active transactions!!!\n"); |
| |
| llist_for_each_entry_safe(trans, temp, &net->trans_list, entry) { |
| if (trans->protocol == protocol) { |
| trans->callref = 0; |
| trans_free(trans); |
| } |
| } |
| } |
| |
| /* Chapter 9.2.14 : Send LOCATION UPDATING REJECT */ |
| static int gsm0408_loc_upd_rej(struct gsm_subscriber_connection *conn, uint8_t cause) |
| { |
| struct msgb *msg; |
| |
| msg = gsm48_create_loc_upd_rej(cause); |
| if (!msg) { |
| LOGP(DMM, LOGL_ERROR, "Failed to create msg for LOCATION UPDATING REJECT.\n"); |
| return -1; |
| } |
| |
| LOGP(DMM, LOGL_INFO, "Subscriber %s: LOCATION UPDATING REJECT\n", |
| vlr_subscr_name(conn->vsub)); |
| |
| return gsm48_conn_sendmsg(msg, conn, NULL); |
| } |
| |
| /* Chapter 9.2.13 : Send LOCATION UPDATE ACCEPT */ |
| static int gsm0408_loc_upd_acc(struct gsm_subscriber_connection *conn, |
| uint32_t send_tmsi) |
| { |
| struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 LOC UPD ACC"); |
| struct gsm48_hdr *gh; |
| struct gsm48_loc_area_id *lai; |
| uint8_t *mid; |
| |
| gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| gh->proto_discr = GSM48_PDISC_MM; |
| gh->msg_type = GSM48_MT_MM_LOC_UPD_ACCEPT; |
| |
| lai = (struct gsm48_loc_area_id *) msgb_put(msg, sizeof(*lai)); |
| gsm48_generate_lai(lai, conn->network->country_code, |
| conn->network->network_code, |
| conn->lac); |
| |
| if (send_tmsi == GSM_RESERVED_TMSI) { |
| /* we did not allocate a TMSI to the MS, so we need to |
| * include the IMSI in order for the MS to delete any |
| * old TMSI that might still be allocated */ |
| uint8_t mi[10]; |
| int len; |
| len = gsm48_generate_mid_from_imsi(mi, conn->vsub->imsi); |
| mid = msgb_put(msg, len); |
| memcpy(mid, mi, len); |
| DEBUGP(DMM, "-> %s LOCATION UPDATE ACCEPT\n", |
| vlr_subscr_name(conn->vsub)); |
| } else { |
| /* Include the TMSI, which means that the MS will send a |
| * TMSI REALLOCATION COMPLETE, and we should wait for |
| * that until T3250 expiration */ |
| mid = msgb_put(msg, GSM48_MID_TMSI_LEN); |
| gsm48_generate_mid_from_tmsi(mid, send_tmsi); |
| DEBUGP(DMM, "-> %s LOCATION UPDATE ACCEPT (TMSI = 0x%08x)\n", |
| vlr_subscr_name(conn->vsub), |
| send_tmsi); |
| } |
| /* TODO: Follow-on proceed */ |
| /* TODO: CTS permission */ |
| /* TODO: Equivalent PLMNs */ |
| /* TODO: Emergency Number List */ |
| /* TODO: Per-MS T3312 */ |
| |
| |
| return gsm48_conn_sendmsg(msg, conn, NULL); |
| } |
| |
| /* Transmit Chapter 9.2.10 Identity Request */ |
| static int mm_tx_identity_req(struct gsm_subscriber_connection *conn, uint8_t id_type) |
| { |
| struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 ID REQ"); |
| struct gsm48_hdr *gh; |
| |
| gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| gh->proto_discr = GSM48_PDISC_MM; |
| gh->msg_type = GSM48_MT_MM_ID_REQ; |
| gh->data[0] = id_type; |
| |
| return gsm48_conn_sendmsg(msg, conn, NULL); |
| } |
| |
| /* Parse Chapter 9.2.11 Identity Response */ |
| static int mm_rx_id_resp(struct gsm_subscriber_connection *conn, struct msgb *msg) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| uint8_t mi_type = gh->data[1] & GSM_MI_TYPE_MASK; |
| char mi_string[GSM48_MI_SIZE]; |
| |
| if (!conn->vsub) { |
| LOGP(DMM, LOGL_ERROR, |
| "Rx MM Identity Response: invalid: no subscriber\n"); |
| return -EINVAL; |
| } |
| |
| gsm48_mi_to_string(mi_string, sizeof(mi_string), &gh->data[1], gh->data[0]); |
| DEBUGP(DMM, "IDENTITY RESPONSE: MI(%s)=%s\n", |
| gsm48_mi_type_name(mi_type), mi_string); |
| |
| osmo_signal_dispatch(SS_SUBSCR, S_SUBSCR_IDENTITY, gh->data); |
| |
| return vlr_subscr_rx_id_resp(conn->vsub, gh->data+1, gh->data[0]); |
| } |
| |
| /* FIXME: to libosmogsm */ |
| static const struct value_string lupd_names[] = { |
| { GSM48_LUPD_NORMAL, "NORMAL" }, |
| { GSM48_LUPD_PERIODIC, "PERIODIC" }, |
| { GSM48_LUPD_IMSI_ATT, "IMSI ATTACH" }, |
| { 0, NULL } |
| }; |
| |
| /* Chapter 9.2.15: Receive Location Updating Request. |
| * Keep this function non-static for direct invocation by unit tests. */ |
| int mm_rx_loc_upd_req(struct gsm_subscriber_connection *conn, struct msgb *msg) |
| { |
| static const enum subscr_conn_from conn_from_lu = SUBSCR_CONN_FROM_LU; |
| struct gsm_network *net = conn->network; |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| struct gsm48_loc_upd_req *lu; |
| uint8_t mi_type; |
| char mi_string[GSM48_MI_SIZE]; |
| enum vlr_lu_type vlr_lu_type = VLR_LU_TYPE_REGULAR; |
| uint32_t tmsi; |
| char *imsi; |
| struct osmo_location_area_id old_lai, new_lai; |
| struct osmo_fsm_inst *lu_fsm; |
| bool is_utran; |
| int rc; |
| |
| lu = (struct gsm48_loc_upd_req *) gh->data; |
| |
| mi_type = lu->mi[0] & GSM_MI_TYPE_MASK; |
| |
| gsm48_mi_to_string(mi_string, sizeof(mi_string), lu->mi, lu->mi_len); |
| |
| rc = msc_create_conn_fsm(conn, mi_string); |
| if (rc) |
| /* logging already happened in msc_create_conn_fsm() */ |
| return rc; |
| |
| conn->classmark.classmark1 = lu->classmark1; |
| conn->classmark.classmark1_set = true; |
| |
| DEBUGP(DMM, "LOCATION UPDATING REQUEST: MI(%s)=%s type=%s\n", |
| gsm48_mi_type_name(mi_type), mi_string, |
| get_value_string(lupd_names, lu->type)); |
| |
| osmo_signal_dispatch(SS_SUBSCR, S_SUBSCR_IDENTITY, &lu->mi_len); |
| |
| switch (lu->type) { |
| case GSM48_LUPD_NORMAL: |
| rate_ctr_inc(&conn->network->msc_ctrs->ctr[MSC_CTR_LOC_UPDATE_TYPE_NORMAL]); |
| vlr_lu_type = VLR_LU_TYPE_REGULAR; |
| break; |
| case GSM48_LUPD_IMSI_ATT: |
| rate_ctr_inc(&conn->network->msc_ctrs->ctr[MSC_CTR_LOC_UPDATE_TYPE_ATTACH]); |
| vlr_lu_type = VLR_LU_TYPE_IMSI_ATTACH; |
| break; |
| case GSM48_LUPD_PERIODIC: |
| rate_ctr_inc(&conn->network->msc_ctrs->ctr[MSC_CTR_LOC_UPDATE_TYPE_PERIODIC]); |
| vlr_lu_type = VLR_LU_TYPE_PERIODIC; |
| break; |
| } |
| |
| /* TODO: 10.5.1.6 MS Classmark for UMTS / Classmark 2 */ |
| /* TODO: 10.5.3.14 Aditional update parameters (CS fallback calls) */ |
| /* TODO: 10.5.7.8 Device properties */ |
| /* TODO: 10.5.1.15 MS network feature support */ |
| |
| switch (mi_type) { |
| case GSM_MI_TYPE_IMSI: |
| tmsi = GSM_RESERVED_TMSI; |
| imsi = mi_string; |
| break; |
| case GSM_MI_TYPE_TMSI: |
| tmsi = tmsi_from_string(mi_string); |
| imsi = NULL; |
| break; |
| default: |
| DEBUGPC(DMM, "unknown mobile identity type\n"); |
| tmsi = GSM_RESERVED_TMSI; |
| imsi = NULL; |
| break; |
| } |
| |
| gsm48_decode_lai(&lu->lai, &old_lai.plmn.mcc, |
| &old_lai.plmn.mnc, &old_lai.lac); |
| new_lai.plmn.mcc = conn->network->country_code; |
| new_lai.plmn.mnc = conn->network->network_code; |
| new_lai.lac = conn->lac; |
| DEBUGP(DMM, "LU/new-LAC: %u/%u\n", old_lai.lac, new_lai.lac); |
| |
| is_utran = (conn->via_ran == RAN_UTRAN_IU); |
| lu_fsm = vlr_loc_update(conn->conn_fsm, |
| SUBSCR_CONN_E_ACCEPTED, |
| SUBSCR_CONN_E_CN_CLOSE, |
| (void*)&conn_from_lu, |
| net->vlr, conn, vlr_lu_type, tmsi, imsi, |
| &old_lai, &new_lai, |
| is_utran || conn->network->authentication_required, |
| is_utran? VLR_CIPH_A5_3 |
| : conn->network->a5_encryption, |
| classmark_is_r99(&conn->classmark), |
| is_utran, |
| net->vlr->cfg.assign_tmsi); |
| if (!lu_fsm) { |
| DEBUGP(DRR, "%s: Can't start LU FSM\n", mi_string); |
| return 0; |
| } |
| |
| /* From vlr_loc_update() we expect an implicit dispatch of |
| * VLR_ULA_E_UPDATE_LA, and thus we expect msc_vlr_subscr_assoc() to |
| * already have been called and completed. Has an error occured? */ |
| |
| if (!conn->vsub || conn->vsub->lu_fsm != lu_fsm) { |
| LOGP(DRR, LOGL_ERROR, |
| "%s: internal error during Location Updating attempt\n", |
| mi_string); |
| return -EIO; |
| } |
| |
| return 0; |
| } |
| |
| /* Turn int into semi-octet representation: 98 => 0x89 */ |
| /* FIXME: libosmocore/libosmogsm */ |
| static uint8_t bcdify(uint8_t value) |
| { |
| uint8_t ret; |
| |
| ret = value / 10; |
| ret |= (value % 10) << 4; |
| |
| return ret; |
| } |
| |
| |
| /* Section 9.2.15a */ |
| int gsm48_tx_mm_info(struct gsm_subscriber_connection *conn) |
| { |
| struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 MM INF"); |
| struct gsm48_hdr *gh; |
| struct gsm_network *net = conn->network; |
| uint8_t *ptr8; |
| int name_len, name_pad; |
| |
| time_t cur_t; |
| struct tm* gmt_time; |
| struct tm* local_time; |
| int tzunits; |
| int dst = 0; |
| |
| gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| gh->proto_discr = GSM48_PDISC_MM; |
| gh->msg_type = GSM48_MT_MM_INFO; |
| |
| if (net->name_long) { |
| #if 0 |
| name_len = strlen(net->name_long); |
| /* 10.5.3.5a */ |
| ptr8 = msgb_put(msg, 3); |
| ptr8[0] = GSM48_IE_NAME_LONG; |
| ptr8[1] = name_len*2 +1; |
| ptr8[2] = 0x90; /* UCS2, no spare bits, no CI */ |
| |
| ptr16 = (uint16_t *) msgb_put(msg, name_len*2); |
| for (i = 0; i < name_len; i++) |
| ptr16[i] = htons(net->name_long[i]); |
| |
| /* FIXME: Use Cell Broadcast, not UCS-2, since |
| * UCS-2 is only supported by later revisions of the spec */ |
| #endif |
| name_len = (strlen(net->name_long)*7)/8; |
| name_pad = (8 - strlen(net->name_long)*7)%8; |
| if (name_pad > 0) |
| name_len++; |
| /* 10.5.3.5a */ |
| ptr8 = msgb_put(msg, 3); |
| ptr8[0] = GSM48_IE_NAME_LONG; |
| ptr8[1] = name_len +1; |
| ptr8[2] = 0x80 | name_pad; /* Cell Broadcast DCS, no CI */ |
| |
| ptr8 = msgb_put(msg, name_len); |
| gsm_7bit_encode_n(ptr8, name_len, net->name_long, NULL); |
| |
| } |
| |
| if (net->name_short) { |
| #if 0 |
| name_len = strlen(net->name_short); |
| /* 10.5.3.5a */ |
| ptr8 = (uint8_t *) msgb_put(msg, 3); |
| ptr8[0] = GSM48_IE_NAME_SHORT; |
| ptr8[1] = name_len*2 + 1; |
| ptr8[2] = 0x90; /* UCS2, no spare bits, no CI */ |
| |
| ptr16 = (uint16_t *) msgb_put(msg, name_len*2); |
| for (i = 0; i < name_len; i++) |
| ptr16[i] = htons(net->name_short[i]); |
| #endif |
| name_len = (strlen(net->name_short)*7)/8; |
| name_pad = (8 - strlen(net->name_short)*7)%8; |
| if (name_pad > 0) |
| name_len++; |
| /* 10.5.3.5a */ |
| ptr8 = (uint8_t *) msgb_put(msg, 3); |
| ptr8[0] = GSM48_IE_NAME_SHORT; |
| ptr8[1] = name_len +1; |
| ptr8[2] = 0x80 | name_pad; /* Cell Broadcast DCS, no CI */ |
| |
| ptr8 = msgb_put(msg, name_len); |
| gsm_7bit_encode_n(ptr8, name_len, net->name_short, NULL); |
| |
| } |
| |
| /* Section 10.5.3.9 */ |
| cur_t = time(NULL); |
| gmt_time = gmtime(&cur_t); |
| |
| ptr8 = msgb_put(msg, 8); |
| ptr8[0] = GSM48_IE_NET_TIME_TZ; |
| ptr8[1] = bcdify(gmt_time->tm_year % 100); |
| ptr8[2] = bcdify(gmt_time->tm_mon + 1); |
| ptr8[3] = bcdify(gmt_time->tm_mday); |
| ptr8[4] = bcdify(gmt_time->tm_hour); |
| ptr8[5] = bcdify(gmt_time->tm_min); |
| ptr8[6] = bcdify(gmt_time->tm_sec); |
| |
| if (net->tz.override) { |
| /* Convert tz.hr and tz.mn to units */ |
| if (net->tz.hr < 0) { |
| tzunits = ((net->tz.hr/-1)*4); |
| tzunits = tzunits + (net->tz.mn/15); |
| ptr8[7] = bcdify(tzunits); |
| /* Set negative time */ |
| ptr8[7] |= 0x08; |
| } |
| else { |
| tzunits = net->tz.hr*4; |
| tzunits = tzunits + (net->tz.mn/15); |
| ptr8[7] = bcdify(tzunits); |
| } |
| /* Convert DST value */ |
| if (net->tz.dst >= 0 && net->tz.dst <= 2) |
| dst = net->tz.dst; |
| } |
| else { |
| /* Need to get GSM offset and convert into 15 min units */ |
| /* This probably breaks if gmtoff returns a value not evenly divisible by 15? */ |
| #ifdef HAVE_TM_GMTOFF_IN_TM |
| local_time = localtime(&cur_t); |
| tzunits = (local_time->tm_gmtoff/60)/15; |
| #else |
| /* find timezone offset */ |
| time_t utc; |
| double offsetFromUTC; |
| utc = mktime(gmt_time); |
| local_time = localtime(&cur_t); |
| offsetFromUTC = difftime(cur_t, utc); |
| if (local_time->tm_isdst) |
| offsetFromUTC += 3600.0; |
| tzunits = ((int)offsetFromUTC) / 60 / 15; |
| #endif |
| if (tzunits < 0) { |
| tzunits = tzunits/-1; |
| ptr8[7] = bcdify(tzunits); |
| /* Flip it to negative */ |
| ptr8[7] |= 0x08; |
| } |
| else |
| ptr8[7] = bcdify(tzunits); |
| |
| /* Does not support DST +2 */ |
| if (local_time->tm_isdst) |
| dst = 1; |
| } |
| |
| if (dst) { |
| ptr8 = msgb_put(msg, 3); |
| ptr8[0] = GSM48_IE_NET_DST; |
| ptr8[1] = 1; |
| ptr8[2] = dst; |
| } |
| |
| DEBUGP(DMM, "-> MM INFO\n"); |
| |
| return gsm48_conn_sendmsg(msg, conn, NULL); |
| } |
| |
| /*! Send an Authentication Request to MS on the given subscriber connection |
| * according to 3GPP/ETSI TS 24.008, Section 9.2.2. |
| * \param[in] conn Subscriber connection to send on. |
| * \param[in] rand Random challenge token to send, must be 16 bytes long. |
| * \param[in] autn r99: In case of UMTS mutual authentication, AUTN token to |
| * send; must be 16 bytes long, or pass NULL for plain GSM auth. |
| * \param[in] key_seq auth tuple's sequence number. |
| */ |
| int gsm48_tx_mm_auth_req(struct gsm_subscriber_connection *conn, uint8_t *rand, |
| uint8_t *autn, int key_seq) |
| { |
| struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 AUTH REQ"); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| struct gsm48_auth_req *ar = (struct gsm48_auth_req *) msgb_put(msg, sizeof(*ar)); |
| |
| DEBUGP(DMM, "-> AUTH REQ (rand = %s)\n", osmo_hexdump_nospc(rand, 16)); |
| if (autn) |
| DEBUGP(DMM, " AUTH REQ (autn = %s)\n", osmo_hexdump_nospc(autn, 16)); |
| |
| gh->proto_discr = GSM48_PDISC_MM; |
| gh->msg_type = GSM48_MT_MM_AUTH_REQ; |
| |
| ar->key_seq = key_seq; |
| |
| /* 16 bytes RAND parameters */ |
| osmo_static_assert(sizeof(ar->rand) == 16, sizeof_auth_req_r99_rand); |
| if (rand) |
| memcpy(ar->rand, rand, 16); |
| |
| |
| /* 16 bytes AUTN */ |
| if (autn) |
| msgb_tlv_put(msg, GSM48_IE_AUTN, 16, autn); |
| |
| return gsm48_conn_sendmsg(msg, conn, NULL); |
| } |
| |
| /* Section 9.2.1 */ |
| int gsm48_tx_mm_auth_rej(struct gsm_subscriber_connection *conn) |
| { |
| DEBUGP(DMM, "-> AUTH REJECT\n"); |
| return gsm48_tx_simple(conn, GSM48_PDISC_MM, GSM48_MT_MM_AUTH_REJ); |
| } |
| |
| static int msc_vlr_tx_cm_serv_acc(void *msc_conn_ref); |
| static int msc_vlr_tx_cm_serv_rej(void *msc_conn_ref, enum vlr_proc_arq_result result); |
| |
| static int cm_serv_reuse_conn(struct gsm_subscriber_connection *conn, const uint8_t *mi_lv) |
| { |
| uint8_t mi_type; |
| char mi_string[GSM48_MI_SIZE]; |
| uint32_t tmsi; |
| |
| gsm48_mi_to_string(mi_string, sizeof(mi_string), mi_lv+1, mi_lv[0]); |
| mi_type = mi_lv[1] & GSM_MI_TYPE_MASK; |
| |
| switch (mi_type) { |
| case GSM_MI_TYPE_IMSI: |
| if (vlr_subscr_matches_imsi(conn->vsub, mi_string)) |
| goto accept_reuse; |
| break; |
| case GSM_MI_TYPE_TMSI: |
| tmsi = osmo_load32be(mi_lv+2); |
| if (vlr_subscr_matches_tmsi(conn->vsub, tmsi)) |
| goto accept_reuse; |
| break; |
| case GSM_MI_TYPE_IMEI: |
| if (vlr_subscr_matches_imei(conn->vsub, mi_string)) |
| goto accept_reuse; |
| break; |
| default: |
| break; |
| } |
| |
| LOGP(DMM, LOGL_ERROR, "%s: CM Service Request with mismatching mobile identity: %s %s\n", |
| vlr_subscr_name(conn->vsub), gsm48_mi_type_name(mi_type), mi_string); |
| msc_vlr_tx_cm_serv_rej(conn, VLR_PR_ARQ_RES_ILLEGAL_SUBSCR); |
| return -EINVAL; |
| |
| accept_reuse: |
| DEBUGP(DMM, "%s: re-using already accepted connection\n", |
| vlr_subscr_name(conn->vsub)); |
| conn->received_cm_service_request = true; |
| return conn->network->vlr->ops.tx_cm_serv_acc(conn); |
| } |
| |
| /* |
| * Handle CM Service Requests |
| * a) Verify that the packet is long enough to contain the information |
| * we require otherwsie reject with INCORRECT_MESSAGE |
| * b) Try to parse the TMSI. If we do not have one reject |
| * c) Check that we know the subscriber with the TMSI otherwise reject |
| * with a HLR cause |
| * d) Set the subscriber on the conn and accept |
| * |
| * Keep this function non-static for direct invocation by unit tests. |
| */ |
| int gsm48_rx_mm_serv_req(struct gsm_subscriber_connection *conn, struct msgb *msg) |
| { |
| static const enum subscr_conn_from conn_from_cm_service_req = |
| SUBSCR_CONN_FROM_CM_SERVICE_REQ; |
| struct gsm_network *net = conn->network; |
| uint8_t mi_type; |
| char mi_string[GSM48_MI_SIZE]; |
| |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| struct gsm48_service_request *req = |
| (struct gsm48_service_request *)gh->data; |
| /* unfortunately in Phase1 the classmark2 length is variable */ |
| uint8_t classmark2_len = gh->data[1]; |
| uint8_t *classmark2 = gh->data+2; |
| uint8_t mi_len = *(classmark2 + classmark2_len); |
| uint8_t *mi = (classmark2 + classmark2_len + 1); |
| struct osmo_location_area_id lai; |
| bool is_utran; |
| int rc; |
| |
| lai.plmn.mcc = conn->network->country_code; |
| lai.plmn.mnc = conn->network->network_code; |
| lai.lac = conn->lac; |
| |
| DEBUGP(DMM, "<- CM SERVICE REQUEST "); |
| if (msg->data_len < sizeof(struct gsm48_service_request*)) { |
| DEBUGPC(DMM, "wrong sized message\n"); |
| return msc_gsm48_tx_mm_serv_rej(conn, |
| GSM48_REJECT_INCORRECT_MESSAGE); |
| } |
| |
| if (msg->data_len < req->mi_len + 6) { |
| DEBUGPC(DMM, "does not fit in packet\n"); |
| return msc_gsm48_tx_mm_serv_rej(conn, |
| GSM48_REJECT_INCORRECT_MESSAGE); |
| } |
| |
| gsm48_mi_to_string(mi_string, sizeof(mi_string), mi, mi_len); |
| mi_type = mi[0] & GSM_MI_TYPE_MASK; |
| |
| if (mi_type == GSM_MI_TYPE_IMSI) { |
| DEBUGPC(DMM, "serv_type=0x%02x MI(%s)=%s\n", |
| req->cm_service_type, gsm48_mi_type_name(mi_type), |
| mi_string); |
| } else if (mi_type == GSM_MI_TYPE_TMSI) { |
| DEBUGPC(DMM, "serv_type=0x%02x MI(%s)=%s\n", |
| req->cm_service_type, gsm48_mi_type_name(mi_type), |
| mi_string); |
| } else { |
| DEBUGPC(DMM, "mi_type is not expected: %d\n", mi_type); |
| return msc_gsm48_tx_mm_serv_rej(conn, |
| GSM48_REJECT_INCORRECT_MESSAGE); |
| } |
| |
| osmo_signal_dispatch(SS_SUBSCR, S_SUBSCR_IDENTITY, (classmark2 + classmark2_len)); |
| memcpy(conn->classmark.classmark2, classmark2, classmark2_len); |
| conn->classmark.classmark2_len = classmark2_len; |
| |
| if (conn->conn_fsm) { |
| if (msc_subscr_conn_is_accepted(conn)) |
| return cm_serv_reuse_conn(conn, mi-1); |
| LOGP(DMM, LOGL_ERROR, "%s: connection already in use\n", |
| vlr_subscr_name(conn->vsub)); |
| msc_vlr_tx_cm_serv_rej(conn, VLR_PR_ARQ_RES_UNKNOWN_ERROR); |
| return -EINVAL; |
| } |
| |
| rc = msc_create_conn_fsm(conn, mi_string); |
| if (rc) { |
| msc_vlr_tx_cm_serv_rej(conn, VLR_PR_ARQ_RES_UNKNOWN_ERROR); |
| /* logging already happened in msc_create_conn_fsm() */ |
| return rc; |
| } |
| |
| is_utran = (conn->via_ran == RAN_UTRAN_IU); |
| vlr_proc_acc_req(conn->conn_fsm, |
| SUBSCR_CONN_E_ACCEPTED, |
| SUBSCR_CONN_E_CN_CLOSE, |
| (void*)&conn_from_cm_service_req, |
| net->vlr, conn, |
| VLR_PR_ARQ_T_CM_SERV_REQ, mi-1, &lai, |
| is_utran || conn->network->authentication_required, |
| is_utran? VLR_CIPH_A5_3 |
| : conn->network->a5_encryption, |
| classmark_is_r99(&conn->classmark), |
| is_utran); |
| |
| return 0; |
| } |
| |
| static int gsm48_rx_mm_imsi_detach_ind(struct gsm_subscriber_connection *conn, struct msgb *msg) |
| { |
| struct gsm_network *network = conn->network; |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| struct gsm48_imsi_detach_ind *idi = |
| (struct gsm48_imsi_detach_ind *) gh->data; |
| uint8_t mi_type = idi->mi[0] & GSM_MI_TYPE_MASK; |
| char mi_string[GSM48_MI_SIZE]; |
| struct vlr_subscr *vsub = NULL; |
| |
| gsm48_mi_to_string(mi_string, sizeof(mi_string), idi->mi, idi->mi_len); |
| DEBUGP(DMM, "IMSI DETACH INDICATION: MI(%s)=%s\n", |
| gsm48_mi_type_name(mi_type), mi_string); |
| |
| rate_ctr_inc(&network->msc_ctrs->ctr[MSC_CTR_LOC_UPDATE_TYPE_DETACH]); |
| |
| switch (mi_type) { |
| case GSM_MI_TYPE_TMSI: |
| vsub = vlr_subscr_find_by_tmsi(network->vlr, |
| tmsi_from_string(mi_string)); |
| break; |
| case GSM_MI_TYPE_IMSI: |
| vsub = vlr_subscr_find_by_imsi(network->vlr, mi_string); |
| break; |
| case GSM_MI_TYPE_IMEI: |
| case GSM_MI_TYPE_IMEISV: |
| /* no sim card... FIXME: what to do ? */ |
| LOGP(DMM, LOGL_ERROR, "MI(%s)=%s: unimplemented mobile identity type\n", |
| gsm48_mi_type_name(mi_type), mi_string); |
| break; |
| default: |
| LOGP(DMM, LOGL_ERROR, "MI(%s)=%s: unknown mobile identity type\n", |
| gsm48_mi_type_name(mi_type), mi_string); |
| break; |
| } |
| |
| /* TODO? We used to remember the subscriber's classmark1 here and |
| * stored it in the old sqlite db, but now we store it in a conn that |
| * will be discarded anyway: */ |
| conn->classmark.classmark1 = idi->classmark1; |
| |
| if (!vsub) { |
| LOGP(DMM, LOGL_ERROR, "IMSI DETACH for unknown subscriber MI(%s)=%s\n", |
| gsm48_mi_type_name(mi_type), mi_string); |
| } else { |
| LOGP(DMM, LOGL_INFO, "IMSI DETACH for %s\n", vlr_subscr_name(vsub)); |
| vlr_subscr_rx_imsi_detach(vsub); |
| osmo_signal_dispatch(SS_SUBSCR, S_SUBSCR_DETACHED, vsub); |
| vlr_subscr_put(vsub); |
| } |
| |
| msc_subscr_conn_close(conn, 0); |
| return 0; |
| } |
| |
| static int gsm48_rx_mm_status(struct msgb *msg) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| |
| DEBUGP(DMM, "MM STATUS (reject cause 0x%02x)\n", gh->data[0]); |
| |
| return 0; |
| } |
| |
| static int parse_gsm_auth_resp(uint8_t *res, uint8_t *res_len, |
| struct gsm_subscriber_connection *conn, |
| struct msgb *msg) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| struct gsm48_auth_resp *ar = (struct gsm48_auth_resp*) gh->data; |
| |
| if (msgb_l3len(msg) < sizeof(*gh) + sizeof(*ar)) { |
| LOGP(DMM, LOGL_ERROR, |
| "%s: MM AUTHENTICATION RESPONSE:" |
| " l3 length invalid: %u\n", |
| vlr_subscr_name(conn->vsub), msgb_l3len(msg)); |
| return -EINVAL; |
| } |
| |
| *res_len = sizeof(ar->sres); |
| memcpy(res, ar->sres, sizeof(ar->sres)); |
| return 0; |
| } |
| |
| static int parse_umts_auth_resp(uint8_t *res, uint8_t *res_len, |
| struct gsm_subscriber_connection *conn, |
| struct msgb *msg) |
| { |
| struct gsm48_hdr *gh; |
| uint8_t *data; |
| uint8_t iei; |
| uint8_t ie_len; |
| unsigned int data_len; |
| |
| /* First parse the GSM part */ |
| if (parse_gsm_auth_resp(res, res_len, conn, msg)) |
| return -EINVAL; |
| OSMO_ASSERT(*res_len == 4); |
| |
| /* Then add the extended res part */ |
| gh = msgb_l3(msg); |
| data = gh->data + sizeof(struct gsm48_auth_resp); |
| data_len = msgb_l3len(msg) - (data - (uint8_t*)msgb_l3(msg)); |
| |
| if (data_len < 3) { |
| LOGP(DMM, LOGL_ERROR, |
| "%s: MM AUTHENTICATION RESPONSE:" |
| " l3 length invalid: %u\n", |
| vlr_subscr_name(conn->vsub), msgb_l3len(msg)); |
| return -EINVAL; |
| } |
| |
| iei = data[0]; |
| ie_len = data[1]; |
| if (iei != GSM48_IE_AUTH_RES_EXT) { |
| LOGP(DMM, LOGL_ERROR, |
| "%s: MM R99 AUTHENTICATION RESPONSE:" |
| " expected IEI 0x%02x, got 0x%02x\n", |
| vlr_subscr_name(conn->vsub), |
| GSM48_IE_AUTH_RES_EXT, iei); |
| return -EINVAL; |
| } |
| |
| if (ie_len > 12) { |
| LOGP(DMM, LOGL_ERROR, |
| "%s: MM R99 AUTHENTICATION RESPONSE:" |
| " extended Auth Resp IE 0x%02x is too large: %u bytes\n", |
| vlr_subscr_name(conn->vsub), GSM48_IE_AUTH_RES_EXT, ie_len); |
| return -EINVAL; |
| } |
| |
| *res_len += ie_len; |
| memcpy(res + 4, &data[2], ie_len); |
| return 0; |
| } |
| |
| /* Chapter 9.2.3: Authentication Response */ |
| static int gsm48_rx_mm_auth_resp(struct gsm_subscriber_connection *conn, struct msgb *msg) |
| { |
| uint8_t res[16]; |
| uint8_t res_len; |
| int rc; |
| bool is_r99; |
| |
| if (!conn->vsub) { |
| LOGP(DMM, LOGL_ERROR, |
| "MM AUTHENTICATION RESPONSE: invalid: no subscriber\n"); |
| msc_subscr_conn_close(conn, GSM_CAUSE_AUTH_FAILED); |
| return -EINVAL; |
| } |
| |
| if (msgb_l3len(msg) > |
| sizeof(struct gsm48_hdr) + sizeof(struct gsm48_auth_resp)) { |
| rc = parse_umts_auth_resp(res, &res_len, conn, msg); |
| is_r99 = true; |
| } else { |
| rc = parse_gsm_auth_resp(res, &res_len, conn, msg); |
| is_r99 = false; |
| } |
| |
| if (rc) { |
| msc_subscr_conn_close(conn, GSM_CAUSE_AUTH_FAILED); |
| return -EINVAL; |
| } |
| |
| DEBUGP(DMM, "%s: MM %s AUTHENTICATION RESPONSE (%s = %s)\n", |
| vlr_subscr_name(conn->vsub), |
| is_r99 ? "R99" : "GSM", is_r99 ? "res" : "sres", |
| osmo_hexdump_nospc(res, res_len)); |
| |
| return vlr_subscr_rx_auth_resp(conn->vsub, is_r99, |
| conn->via_ran == RAN_UTRAN_IU, |
| res, res_len); |
| } |
| |
| static int gsm48_rx_mm_auth_fail(struct gsm_subscriber_connection *conn, struct msgb *msg) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| uint8_t cause; |
| uint8_t auts_tag; |
| uint8_t auts_len; |
| uint8_t *auts; |
| |
| if (!conn->vsub) { |
| LOGP(DMM, LOGL_ERROR, |
| "MM R99 AUTHENTICATION FAILURE: invalid: no subscriber\n"); |
| msc_subscr_conn_close(conn, GSM_CAUSE_AUTH_FAILED); |
| return -EINVAL; |
| } |
| |
| if (msgb_l3len(msg) < sizeof(*gh) + 1) { |
| LOGP(DMM, LOGL_ERROR, |
| "%s: MM R99 AUTHENTICATION FAILURE:" |
| " l3 length invalid: %u\n", |
| vlr_subscr_name(conn->vsub), msgb_l3len(msg)); |
| msc_subscr_conn_close(conn, GSM_CAUSE_AUTH_FAILED); |
| return -EINVAL; |
| } |
| |
| cause = gh->data[0]; |
| |
| if (cause != GSM48_REJECT_SYNCH_FAILURE) { |
| LOGP(DMM, LOGL_INFO, |
| "%s: MM R99 AUTHENTICATION FAILURE: cause 0x%0x\n", |
| vlr_subscr_name(conn->vsub), cause); |
| vlr_subscr_rx_auth_fail(conn->vsub, NULL); |
| return 0; |
| } |
| |
| /* This is a Synch Failure procedure, which should pass an AUTS to |
| * resynchronize the sequence nr with the HLR. Expecting exactly one |
| * TLV with 14 bytes of AUTS. */ |
| |
| if (msgb_l3len(msg) < sizeof(*gh) + 1 + 2) { |
| LOGP(DMM, LOGL_INFO, |
| "%s: MM R99 AUTHENTICATION FAILURE:" |
| " invalid Synch Failure: missing AUTS IE\n", |
| vlr_subscr_name(conn->vsub)); |
| msc_subscr_conn_close(conn, GSM_CAUSE_AUTH_FAILED); |
| return -EINVAL; |
| } |
| |
| auts_tag = gh->data[1]; |
| auts_len = gh->data[2]; |
| auts = &gh->data[3]; |
| |
| if (auts_tag != GSM48_IE_AUTS |
| || auts_len != 14) { |
| LOGP(DMM, LOGL_INFO, |
| "%s: MM R99 AUTHENTICATION FAILURE:" |
| " invalid Synch Failure:" |
| " expected AUTS IE 0x%02x of 14 bytes," |
| " got IE 0x%02x of %u bytes\n", |
| vlr_subscr_name(conn->vsub), |
| GSM48_IE_AUTS, auts_tag, auts_len); |
| msc_subscr_conn_close(conn, GSM_CAUSE_AUTH_FAILED); |
| return -EINVAL; |
| } |
| |
| if (msgb_l3len(msg) < sizeof(*gh) + 1 + 2 + auts_len) { |
| LOGP(DMM, LOGL_INFO, |
| "%s: MM R99 AUTHENTICATION FAILURE:" |
| " invalid Synch Failure msg: message truncated (%u)\n", |
| vlr_subscr_name(conn->vsub), msgb_l3len(msg)); |
| msc_subscr_conn_close(conn, GSM_CAUSE_AUTH_FAILED); |
| return -EINVAL; |
| } |
| |
| /* We have an AUTS IE with exactly 14 bytes of AUTS and the msgb is |
| * large enough. */ |
| |
| DEBUGP(DMM, "%s: MM R99 AUTHENTICATION SYNCH (AUTS = %s)\n", |
| vlr_subscr_name(conn->vsub), osmo_hexdump_nospc(auts, 14)); |
| |
| return vlr_subscr_rx_auth_fail(conn->vsub, auts); |
| } |
| |
| static int gsm48_rx_mm_tmsi_reall_compl(struct gsm_subscriber_connection *conn) |
| { |
| DEBUGP(DMM, "TMSI Reallocation Completed. Subscriber: %s\n", |
| vlr_subscr_name(conn->vsub)); |
| if (!conn->vsub) { |
| LOGP(DMM, LOGL_ERROR, |
| "Rx MM TMSI Reallocation Complete: invalid: no subscriber\n"); |
| return -EINVAL; |
| } |
| return vlr_subscr_rx_tmsi_reall_compl(conn->vsub); |
| } |
| |
| /* Receive a GSM 04.08 Mobility Management (MM) message */ |
| static int gsm0408_rcv_mm(struct gsm_subscriber_connection *conn, struct msgb *msg) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| int rc = 0; |
| |
| switch (gsm48_hdr_msg_type(gh)) { |
| case GSM48_MT_MM_LOC_UPD_REQUEST: |
| rc = mm_rx_loc_upd_req(conn, msg); |
| break; |
| case GSM48_MT_MM_ID_RESP: |
| rc = mm_rx_id_resp(conn, msg); |
| break; |
| case GSM48_MT_MM_CM_SERV_REQ: |
| rc = gsm48_rx_mm_serv_req(conn, msg); |
| break; |
| case GSM48_MT_MM_STATUS: |
| rc = gsm48_rx_mm_status(msg); |
| break; |
| case GSM48_MT_MM_TMSI_REALL_COMPL: |
| rc = gsm48_rx_mm_tmsi_reall_compl(conn); |
| break; |
| case GSM48_MT_MM_IMSI_DETACH_IND: |
| rc = gsm48_rx_mm_imsi_detach_ind(conn, msg); |
| break; |
| case GSM48_MT_MM_CM_REEST_REQ: |
| DEBUGP(DMM, "CM REESTABLISH REQUEST: Not implemented\n"); |
| break; |
| case GSM48_MT_MM_AUTH_RESP: |
| rc = gsm48_rx_mm_auth_resp(conn, msg); |
| break; |
| case GSM48_MT_MM_AUTH_FAIL: |
| rc = gsm48_rx_mm_auth_fail(conn, msg); |
| break; |
| default: |
| LOGP(DMM, LOGL_NOTICE, "Unknown GSM 04.08 MM msg type 0x%02x\n", |
| gh->msg_type); |
| break; |
| } |
| |
| return rc; |
| } |
| |
| static uint8_t *gsm48_cm2_get_mi(uint8_t *classmark2_lv, unsigned int tot_len) |
| { |
| /* Check the size for the classmark */ |
| if (tot_len < 1 + *classmark2_lv) |
| return NULL; |
| |
| uint8_t *mi_lv = classmark2_lv + *classmark2_lv + 1; |
| if (tot_len < 2 + *classmark2_lv + mi_lv[0]) |
| return NULL; |
| |
| return mi_lv; |
| } |
| |
| /* Receive a PAGING RESPONSE message from the MS */ |
| static int gsm48_rx_rr_pag_resp(struct gsm_subscriber_connection *conn, struct msgb *msg) |
| { |
| static const enum subscr_conn_from conn_from_paging_resp = |
| SUBSCR_CONN_FROM_PAGING_RESP; |
| struct gsm_network *net = conn->network; |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| struct gsm48_pag_resp *resp; |
| uint8_t *classmark2_lv = gh->data + 1; |
| uint8_t *mi_lv; |
| uint8_t mi_type; |
| char mi_string[GSM48_MI_SIZE]; |
| int rc = 0; |
| struct osmo_location_area_id lai; |
| bool is_utran; |
| |
| lai.plmn.mcc = conn->network->country_code; |
| lai.plmn.mnc = conn->network->network_code; |
| lai.lac = conn->lac; |
| |
| resp = (struct gsm48_pag_resp *) &gh->data[0]; |
| gsm48_paging_extract_mi(resp, msgb_l3len(msg) - sizeof(*gh), |
| mi_string, &mi_type); |
| DEBUGP(DRR, "PAGING RESPONSE: MI(%s)=%s\n", |
| gsm48_mi_type_name(mi_type), mi_string); |
| |
| mi_lv = gsm48_cm2_get_mi(classmark2_lv, msgb_l3len(msg) - sizeof(*gh)); |
| if (!mi_lv) { |
| /* FIXME */ |
| return -1; |
| } |
| |
| rc = msc_create_conn_fsm(conn, mi_string); |
| if (rc) |
| /* logging already happened in msc_create_conn_fsm() */ |
| return rc; |
| |
| memcpy(conn->classmark.classmark2, classmark2_lv+1, *classmark2_lv); |
| conn->classmark.classmark2_len = *classmark2_lv; |
| |
| is_utran = (conn->via_ran == RAN_UTRAN_IU); |
| vlr_proc_acc_req(conn->conn_fsm, |
| SUBSCR_CONN_E_ACCEPTED, |
| SUBSCR_CONN_E_CN_CLOSE, |
| (void*)&conn_from_paging_resp, |
| net->vlr, conn, |
| VLR_PR_ARQ_T_PAGING_RESP, mi_lv, &lai, |
| is_utran || conn->network->authentication_required, |
| is_utran? VLR_CIPH_A5_3 |
| : conn->network->a5_encryption, |
| classmark_is_r99(&conn->classmark), |
| is_utran); |
| |
| return 0; |
| } |
| |
| static int gsm48_rx_rr_app_info(struct gsm_subscriber_connection *conn, struct msgb *msg) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| uint8_t apdu_id_flags; |
| uint8_t apdu_len; |
| uint8_t *apdu_data; |
| |
| apdu_id_flags = gh->data[0]; |
| apdu_len = gh->data[1]; |
| apdu_data = gh->data+2; |
| |
| DEBUGP(DRR, "RX APPLICATION INFO id/flags=0x%02x apdu_len=%u apdu=%s\n", |
| apdu_id_flags, apdu_len, osmo_hexdump(apdu_data, apdu_len)); |
| |
| /* we're not using the app info blob anywhere, so ignore. */ |
| #if 0 |
| return db_apdu_blob_store(conn->subscr, apdu_id_flags, apdu_len, apdu_data); |
| #else |
| return 0; |
| #endif |
| } |
| |
| /* Receive a GSM 04.08 Radio Resource (RR) message */ |
| static int gsm0408_rcv_rr(struct gsm_subscriber_connection *conn, struct msgb *msg) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| int rc = 0; |
| |
| switch (gh->msg_type) { |
| case GSM48_MT_RR_PAG_RESP: |
| rc = gsm48_rx_rr_pag_resp(conn, msg); |
| break; |
| case GSM48_MT_RR_APP_INFO: |
| rc = gsm48_rx_rr_app_info(conn, msg); |
| break; |
| default: |
| LOGP(DRR, LOGL_NOTICE, "MSC: Unimplemented %s GSM 04.08 RR " |
| "message\n", gsm48_rr_msg_name(gh->msg_type)); |
| break; |
| } |
| |
| return rc; |
| } |
| |
| int gsm48_send_rr_app_info(struct gsm_subscriber_connection *conn, uint8_t apdu_id, |
| uint8_t apdu_len, const uint8_t *apdu) |
| { |
| struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 APP INF"); |
| struct gsm48_hdr *gh; |
| |
| DEBUGP(DRR, "TX APPLICATION INFO id=0x%02x, len=%u\n", |
| apdu_id, apdu_len); |
| |
| gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 2 + apdu_len); |
| gh->proto_discr = GSM48_PDISC_RR; |
| gh->msg_type = GSM48_MT_RR_APP_INFO; |
| gh->data[0] = apdu_id; |
| gh->data[1] = apdu_len; |
| memcpy(gh->data+2, apdu, apdu_len); |
| |
| return gsm48_conn_sendmsg(msg, conn, NULL); |
| } |
| |
| /* FIXME: this count_statistics is a state machine behaviour. we should convert |
| * the complete call control into a state machine. Afterwards we can move this |
| * code into state transitions. |
| */ |
| static void count_statistics(struct gsm_trans *trans, int new_state) |
| { |
| int old_state = trans->cc.state; |
| struct rate_ctr_group *msc = trans->net->msc_ctrs; |
| |
| if (old_state == new_state) |
| return; |
| |
| /* state incoming */ |
| switch (new_state) { |
| case GSM_CSTATE_ACTIVE: |
| osmo_counter_inc(trans->net->active_calls); |
| rate_ctr_inc(&msc->ctr[MSC_CTR_CALL_ACTIVE]); |
| break; |
| } |
| |
| /* state outgoing */ |
| switch (old_state) { |
| case GSM_CSTATE_ACTIVE: |
| osmo_counter_dec(trans->net->active_calls); |
| if (new_state == GSM_CSTATE_DISCONNECT_REQ || |
| new_state == GSM_CSTATE_DISCONNECT_IND) |
| rate_ctr_inc(&msc->ctr[MSC_CTR_CALL_COMPLETE]); |
| else |
| rate_ctr_inc(&msc->ctr[MSC_CTR_CALL_INCOMPLETE]); |
| break; |
| } |
| } |
| |
| /* Call Control */ |
| |
| /* The entire call control code is written in accordance with Figure 7.10c |
| * for 'very early assignment', i.e. we allocate a TCH/F during IMMEDIATE |
| * ASSIGN, then first use that TCH/F for signalling and later MODE MODIFY |
| * it for voice */ |
| |
| static void new_cc_state(struct gsm_trans *trans, int state) |
| { |
| if (state > 31 || state < 0) |
| return; |
| |
| DEBUGP(DCC, "new state %s -> %s\n", |
| gsm48_cc_state_name(trans->cc.state), |
| gsm48_cc_state_name(state)); |
| |
| count_statistics(trans, state); |
| trans->cc.state = state; |
| } |
| |
| static int gsm48_cc_tx_status(struct gsm_trans *trans, void *arg) |
| { |
| struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 CC STATUS"); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| uint8_t *cause, *call_state; |
| |
| gh->msg_type = GSM48_MT_CC_STATUS; |
| |
| cause = msgb_put(msg, 3); |
| cause[0] = 2; |
| cause[1] = GSM48_CAUSE_CS_GSM | GSM48_CAUSE_LOC_USER; |
| cause[2] = 0x80 | 30; /* response to status inquiry */ |
| |
| call_state = msgb_put(msg, 1); |
| call_state[0] = 0xc0 | 0x00; |
| |
| return gsm48_conn_sendmsg(msg, trans->conn, trans); |
| } |
| |
| static int gsm48_tx_simple(struct gsm_subscriber_connection *conn, |
| uint8_t pdisc, uint8_t msg_type) |
| { |
| struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 TX SIMPLE"); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| |
| gh->proto_discr = pdisc; |
| gh->msg_type = msg_type; |
| |
| return gsm48_conn_sendmsg(msg, conn, NULL); |
| } |
| |
| static void gsm48_stop_cc_timer(struct gsm_trans *trans) |
| { |
| if (osmo_timer_pending(&trans->cc.timer)) { |
| DEBUGP(DCC, "stopping pending timer T%x\n", trans->cc.Tcurrent); |
| osmo_timer_del(&trans->cc.timer); |
| trans->cc.Tcurrent = 0; |
| } |
| } |
| |
| static int mncc_recvmsg(struct gsm_network *net, struct gsm_trans *trans, |
| int msg_type, struct gsm_mncc *mncc) |
| { |
| struct msgb *msg; |
| unsigned char *data; |
| |
| DEBUGP(DMNCC, "transmit message %s\n", get_mncc_name(msg_type)); |
| |
| #if BEFORE_MSCSPLIT |
| /* Re-enable this log output once we can obtain this information via |
| * A-interface, see OS#2391. */ |
| if (trans) |
| if (trans->conn && trans->conn->lchan) |
| DEBUGP(DCC, "(bts %d trx %d ts %d ti %x sub %s) " |
| "Sending '%s' to MNCC.\n", |
| trans->conn->lchan->ts->trx->bts->nr, |
| trans->conn->lchan->ts->trx->nr, |
| trans->conn->lchan->ts->nr, trans->transaction_id, |
| vlr_subscr_msisdn_or_name(trans->vsub), |
| get_mncc_name(msg_type)); |
| else |
| DEBUGP(DCC, "(bts - trx - ts - ti -- sub %s) " |
| "Sending '%s' to MNCC.\n", |
| vlr_subscr_msisdn_or_name(trans->vsub), |
| get_mncc_name(msg_type)); |
| else |
| DEBUGP(DCC, "(bts - trx - ts - ti -- sub -) " |
| "Sending '%s' to MNCC.\n", get_mncc_name(msg_type)); |
| #else |
| DEBUGP(DCC, "Sending '%s' to MNCC.\n", get_mncc_name(msg_type)); |
| #endif |
| |
| mncc->msg_type = msg_type; |
| |
| msg = msgb_alloc(sizeof(struct gsm_mncc), "MNCC"); |
| if (!msg) |
| return -ENOMEM; |
| |
| data = msgb_put(msg, sizeof(struct gsm_mncc)); |
| memcpy(data, mncc, sizeof(struct gsm_mncc)); |
| |
| cc_tx_to_mncc(net, msg); |
| |
| return 0; |
| } |
| |
| int mncc_release_ind(struct gsm_network *net, struct gsm_trans *trans, |
| uint32_t callref, int location, int value) |
| { |
| struct gsm_mncc rel; |
| |
| memset(&rel, 0, sizeof(rel)); |
| rel.callref = callref; |
| mncc_set_cause(&rel, location, value); |
| if (trans && trans->cc.state == GSM_CSTATE_RELEASE_REQ) |
| return mncc_recvmsg(net, trans, MNCC_REL_CNF, &rel); |
| return mncc_recvmsg(net, trans, MNCC_REL_IND, &rel); |
| } |
| |
| /* Call Control Specific transaction release. |
| * gets called by trans_free, DO NOT CALL YOURSELF! */ |
| void _gsm48_cc_trans_free(struct gsm_trans *trans) |
| { |
| gsm48_stop_cc_timer(trans); |
| |
| /* Make sure call also gets released on the mgcp side */ |
| msc_call_release(trans); |
| |
| /* send release to L4, if callref still exists */ |
| if (trans->callref) { |
| /* Ressource unavailable */ |
| mncc_release_ind(trans->net, trans, trans->callref, |
| GSM48_CAUSE_LOC_PRN_S_LU, |
| GSM48_CC_CAUSE_RESOURCE_UNAVAIL); |
| } |
| if (trans->cc.state != GSM_CSTATE_NULL) |
| new_cc_state(trans, GSM_CSTATE_NULL); |
| } |
| |
| static int gsm48_cc_tx_setup(struct gsm_trans *trans, void *arg); |
| |
| /* call-back from paging the B-end of the connection */ |
| static int setup_trig_pag_evt(unsigned int hooknum, unsigned int event, |
| struct msgb *msg, void *_conn, void *_transt) |
| { |
| struct gsm_subscriber_connection *conn = _conn; |
| struct gsm_trans *transt = _transt; |
| |
| OSMO_ASSERT(!transt->conn); |
| |
| switch (event) { |
| case GSM_PAGING_SUCCEEDED: |
| DEBUGP(DCC, "Paging subscr %s succeeded!\n", |
| vlr_subscr_msisdn_or_name(transt->vsub)); |
| OSMO_ASSERT(conn); |
| /* Assign conn */ |
| transt->conn = conn; |
| /* send SETUP request to called party */ |
| gsm48_cc_tx_setup(transt, &transt->cc.msg); |
| break; |
| case GSM_PAGING_EXPIRED: |
| case GSM_PAGING_BUSY: |
| DEBUGP(DCC, "Paging subscr %s expired!\n", |
| vlr_subscr_msisdn_or_name(transt->vsub)); |
| /* Temporarily out of order */ |
| mncc_release_ind(transt->net, transt, |
| transt->callref, |
| GSM48_CAUSE_LOC_PRN_S_LU, |
| GSM48_CC_CAUSE_DEST_OOO); |
| transt->callref = 0; |
| transt->paging_request = NULL; |
| trans_free(transt); |
| break; |
| default: |
| LOGP(DCC, LOGL_ERROR, "Unknown paging event %d\n", event); |
| break; |
| } |
| |
| transt->paging_request = NULL; |
| return 0; |
| } |
| |
| /* bridge channels of two transactions */ |
| static int tch_bridge(struct gsm_network *net, struct gsm_mncc_bridge *bridge) |
| { |
| struct gsm_trans *trans1 = trans_find_by_callref(net, bridge->callref[0]); |
| struct gsm_trans *trans2 = trans_find_by_callref(net, bridge->callref[1]); |
| |
| if (!trans1 || !trans2) |
| return -EIO; |
| |
| if (!trans1->conn || !trans2->conn) |
| return -EIO; |
| |
| /* Which subscriber do we want to track trans1 or trans2? */ |
| log_set_context(LOG_CTX_VLR_SUBSCR, trans1->vsub); |
| |
| return msc_call_bridge(trans1, trans2); |
| } |
| |
| static int gsm48_cc_rx_status_enq(struct gsm_trans *trans, struct msgb *msg) |
| { |
| DEBUGP(DCC, "-> STATUS ENQ\n"); |
| return gsm48_cc_tx_status(trans, msg); |
| } |
| |
| static int gsm48_cc_tx_release(struct gsm_trans *trans, void *arg); |
| static int gsm48_cc_tx_disconnect(struct gsm_trans *trans, void *arg); |
| |
| static void gsm48_cc_timeout(void *arg) |
| { |
| struct gsm_trans *trans = arg; |
| int disconnect = 0, release = 0; |
| int mo_cause = GSM48_CC_CAUSE_RECOVERY_TIMER; |
| int mo_location = GSM48_CAUSE_LOC_USER; |
| int l4_cause = GSM48_CC_CAUSE_NORMAL_UNSPEC; |
| int l4_location = GSM48_CAUSE_LOC_PRN_S_LU; |
| struct gsm_mncc mo_rel, l4_rel; |
| |
| memset(&mo_rel, 0, sizeof(struct gsm_mncc)); |
| mo_rel.callref = trans->callref; |
| memset(&l4_rel, 0, sizeof(struct gsm_mncc)); |
| l4_rel.callref = trans->callref; |
| |
| switch(trans->cc.Tcurrent) { |
| case 0x303: |
| release = 1; |
| l4_cause = GSM48_CC_CAUSE_USER_NOTRESPOND; |
| break; |
| case 0x310: |
| disconnect = 1; |
| l4_cause = GSM48_CC_CAUSE_USER_NOTRESPOND; |
| break; |
| case 0x313: |
| disconnect = 1; |
| /* unknown, did not find it in the specs */ |
| break; |
| case 0x301: |
| disconnect = 1; |
| l4_cause = GSM48_CC_CAUSE_USER_NOTRESPOND; |
| break; |
| case 0x308: |
| if (!trans->cc.T308_second) { |
| /* restart T308 a second time */ |
| gsm48_cc_tx_release(trans, &trans->cc.msg); |
| trans->cc.T308_second = 1; |
| break; /* stay in release state */ |
| } |
| trans_free(trans); |
| return; |
| // release = 1; |
| // l4_cause = 14; |
| // break; |
| case 0x306: |
| release = 1; |
| mo_cause = trans->cc.msg.cause.value; |
| mo_location = trans->cc.msg.cause.location; |
| break; |
| case 0x323: |
| disconnect = 1; |
| break; |
| default: |
| release = 1; |
| } |
| |
| if (release && trans->callref) { |
| /* process release towards layer 4 */ |
| mncc_release_ind(trans->net, trans, trans->callref, |
| l4_location, l4_cause); |
| trans->callref = 0; |
| } |
| |
| if (disconnect && trans->callref) { |
| /* process disconnect towards layer 4 */ |
| mncc_set_cause(&l4_rel, l4_location, l4_cause); |
| mncc_recvmsg(trans->net, trans, MNCC_DISC_IND, &l4_rel); |
| } |
| |
| /* process disconnect towards mobile station */ |
| if (disconnect || release) { |
| mncc_set_cause(&mo_rel, mo_location, mo_cause); |
| mo_rel.cause.diag[0] = ((trans->cc.Tcurrent & 0xf00) >> 8) + '0'; |
| mo_rel.cause.diag[1] = ((trans->cc.Tcurrent & 0x0f0) >> 4) + '0'; |
| mo_rel.cause.diag[2] = (trans->cc.Tcurrent & 0x00f) + '0'; |
| mo_rel.cause.diag_len = 3; |
| |
| if (disconnect) |
| gsm48_cc_tx_disconnect(trans, &mo_rel); |
| if (release) |
| gsm48_cc_tx_release(trans, &mo_rel); |
| } |
| |
| } |
| |
| /* disconnect both calls from the bridge */ |
| static inline void disconnect_bridge(struct gsm_network *net, |
| struct gsm_mncc_bridge *bridge, int err) |
| { |
| struct gsm_trans *trans0 = trans_find_by_callref(net, bridge->callref[0]); |
| struct gsm_trans *trans1 = trans_find_by_callref(net, bridge->callref[1]); |
| struct gsm_mncc mx_rel; |
| if (!trans0 || !trans1) |
| return; |
| |
| DEBUGP(DCC, "Failed to bridge TCH for calls %x <-> %x :: %s \n", |
| trans0->callref, trans1->callref, strerror(err)); |
| |
| memset(&mx_rel, 0, sizeof(struct gsm_mncc)); |
| mncc_set_cause(&mx_rel, GSM48_CAUSE_LOC_INN_NET, |
| GSM48_CC_CAUSE_CHAN_UNACCEPT); |
| |
| mx_rel.callref = trans0->callref; |
| gsm48_cc_tx_disconnect(trans0, &mx_rel); |
| |
| mx_rel.callref = trans1->callref; |
| gsm48_cc_tx_disconnect(trans1, &mx_rel); |
| } |
| |
| static void gsm48_start_cc_timer(struct gsm_trans *trans, int current, |
| int sec, int micro) |
| { |
| DEBUGP(DCC, "starting timer T%x with %d seconds\n", current, sec); |
| osmo_timer_setup(&trans->cc.timer, gsm48_cc_timeout, trans); |
| osmo_timer_schedule(&trans->cc.timer, sec, micro); |
| trans->cc.Tcurrent = current; |
| } |
| |
| static int gsm48_cc_rx_setup(struct gsm_trans *trans, struct msgb *msg) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| uint8_t msg_type = gsm48_hdr_msg_type(gh); |
| unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh); |
| struct tlv_parsed tp; |
| struct gsm_mncc setup; |
| |
| memset(&setup, 0, sizeof(struct gsm_mncc)); |
| setup.callref = trans->callref; |
| |
| tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, 0, 0); |
| /* emergency setup is identified by msg_type */ |
| if (msg_type == GSM48_MT_CC_EMERG_SETUP) |
| setup.emergency = 1; |
| |
| /* use subscriber as calling party number */ |
| setup.fields |= MNCC_F_CALLING; |
| osmo_strlcpy(setup.calling.number, trans->vsub->msisdn, sizeof(setup.calling.number)); |
| osmo_strlcpy(setup.imsi, trans->vsub->imsi, sizeof(setup.imsi)); |
| |
| /* bearer capability */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_BEARER_CAP)) { |
| setup.fields |= MNCC_F_BEARER_CAP; |
| gsm48_decode_bearer_cap(&setup.bearer_cap, |
| TLVP_VAL(&tp, GSM48_IE_BEARER_CAP)-1); |
| |
| /* Create a copy of the bearer capability |
| * in the transaction struct, so we can use |
| * this information later */ |
| memcpy(&trans->bearer_cap,&setup.bearer_cap, |
| sizeof(trans->bearer_cap)); |
| } |
| /* facility */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_FACILITY)) { |
| setup.fields |= MNCC_F_FACILITY; |
| gsm48_decode_facility(&setup.facility, |
| TLVP_VAL(&tp, GSM48_IE_FACILITY)-1); |
| } |
| /* called party bcd number */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_CALLED_BCD)) { |
| setup.fields |= MNCC_F_CALLED; |
| gsm48_decode_called(&setup.called, |
| TLVP_VAL(&tp, GSM48_IE_CALLED_BCD)-1); |
| } |
| /* user-user */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_USER_USER)) { |
| setup.fields |= MNCC_F_USERUSER; |
| gsm48_decode_useruser(&setup.useruser, |
| TLVP_VAL(&tp, GSM48_IE_USER_USER)-1); |
| } |
| /* ss-version */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_SS_VERS)) { |
| setup.fields |= MNCC_F_SSVERSION; |
| gsm48_decode_ssversion(&setup.ssversion, |
| TLVP_VAL(&tp, GSM48_IE_SS_VERS)-1); |
| } |
| /* CLIR suppression */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_CLIR_SUPP)) |
| setup.clir.sup = 1; |
| /* CLIR invocation */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_CLIR_INVOC)) |
| setup.clir.inv = 1; |
| /* cc cap */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_CC_CAP)) { |
| setup.fields |= MNCC_F_CCCAP; |
| gsm48_decode_cccap(&setup.cccap, |
| TLVP_VAL(&tp, GSM48_IE_CC_CAP)-1); |
| } |
| |
| new_cc_state(trans, GSM_CSTATE_INITIATED); |
| |
| LOGP(DCC, LOGL_INFO, "Subscriber %s (%s) sends SETUP to %s\n", |
| vlr_subscr_name(trans->vsub), trans->vsub->msisdn, |
| setup.called.number); |
| |
| rate_ctr_inc(&trans->net->msc_ctrs->ctr[MSC_CTR_CALL_MO_SETUP]); |
| |
| /* indicate setup to MNCC */ |
| mncc_recvmsg(trans->net, trans, MNCC_SETUP_IND, &setup); |
| |
| /* MNCC code will modify the channel asynchronously, we should |
| * ipaccess-bind only after the modification has been made to the |
| * lchan->tch_mode */ |
| return 0; |
| } |
| |
| static int gsm48_cc_tx_setup(struct gsm_trans *trans, void *arg) |
| { |
| struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 CC STUP"); |
| struct gsm48_hdr *gh; |
| struct gsm_mncc *setup = arg; |
| int rc, trans_id; |
| |
| gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| |
| /* transaction id must not be assigned */ |
| if (trans->transaction_id != 0xff) { /* unasssigned */ |
| DEBUGP(DCC, "TX Setup with assigned transaction. " |
| "This is not allowed!\n"); |
| /* Temporarily out of order */ |
| rc = mncc_release_ind(trans->net, trans, trans->callref, |
| GSM48_CAUSE_LOC_PRN_S_LU, |
| GSM48_CC_CAUSE_RESOURCE_UNAVAIL); |
| trans->callref = 0; |
| trans_free(trans); |
| return rc; |
| } |
| |
| /* Get free transaction_id */ |
| trans_id = trans_assign_trans_id(trans->net, trans->vsub, |
| GSM48_PDISC_CC, 0); |
| if (trans_id < 0) { |
| /* no free transaction ID */ |
| rc = mncc_release_ind(trans->net, trans, trans->callref, |
| GSM48_CAUSE_LOC_PRN_S_LU, |
| GSM48_CC_CAUSE_RESOURCE_UNAVAIL); |
| trans->callref = 0; |
| trans_free(trans); |
| return rc; |
| } |
| trans->transaction_id = trans_id; |
| |
| gh->msg_type = GSM48_MT_CC_SETUP; |
| |
| gsm48_start_cc_timer(trans, 0x303, GSM48_T303); |
| |
| /* bearer capability */ |
| if (setup->fields & MNCC_F_BEARER_CAP) |
| gsm48_encode_bearer_cap(msg, 0, &setup->bearer_cap); |
| /* facility */ |
| if (setup->fields & MNCC_F_FACILITY) |
| gsm48_encode_facility(msg, 0, &setup->facility); |
| /* progress */ |
| if (setup->fields & MNCC_F_PROGRESS) |
| gsm48_encode_progress(msg, 0, &setup->progress); |
| /* calling party BCD number */ |
| if (setup->fields & MNCC_F_CALLING) |
| gsm48_encode_calling(msg, &setup->calling); |
| /* called party BCD number */ |
| if (setup->fields & MNCC_F_CALLED) |
| gsm48_encode_called(msg, &setup->called); |
| /* user-user */ |
| if (setup->fields & MNCC_F_USERUSER) |
| gsm48_encode_useruser(msg, 0, &setup->useruser); |
| /* redirecting party BCD number */ |
| if (setup->fields & MNCC_F_REDIRECTING) |
| gsm48_encode_redirecting(msg, &setup->redirecting); |
| /* signal */ |
| if (setup->fields & MNCC_F_SIGNAL) |
| gsm48_encode_signal(msg, setup->signal); |
| |
| new_cc_state(trans, GSM_CSTATE_CALL_PRESENT); |
| |
| rate_ctr_inc(&trans->net->msc_ctrs->ctr[MSC_CTR_CALL_MT_SETUP]); |
| |
| return gsm48_conn_sendmsg(msg, trans->conn, trans); |
| } |
| |
| static int gsm48_cc_rx_call_conf(struct gsm_trans *trans, struct msgb *msg) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh); |
| struct tlv_parsed tp; |
| struct gsm_mncc call_conf; |
| int rc; |
| |
| gsm48_stop_cc_timer(trans); |
| gsm48_start_cc_timer(trans, 0x310, GSM48_T310); |
| |
| memset(&call_conf, 0, sizeof(struct gsm_mncc)); |
| call_conf.callref = trans->callref; |
| |
| tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, 0, 0); |
| #if 0 |
| /* repeat */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_REPEAT_CIR)) |
| call_conf.repeat = 1; |
| if (TLVP_PRESENT(&tp, GSM48_IE_REPEAT_SEQ)) |
| call_conf.repeat = 2; |
| #endif |
| /* bearer capability */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_BEARER_CAP)) { |
| call_conf.fields |= MNCC_F_BEARER_CAP; |
| gsm48_decode_bearer_cap(&call_conf.bearer_cap, |
| TLVP_VAL(&tp, GSM48_IE_BEARER_CAP)-1); |
| |
| /* Create a copy of the bearer capability |
| * in the transaction struct, so we can use |
| * this information later */ |
| memcpy(&trans->bearer_cap,&call_conf.bearer_cap, |
| sizeof(trans->bearer_cap)); |
| } |
| /* cause */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_CAUSE)) { |
| call_conf.fields |= MNCC_F_CAUSE; |
| gsm48_decode_cause(&call_conf.cause, |
| TLVP_VAL(&tp, GSM48_IE_CAUSE)-1); |
| } |
| /* cc cap */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_CC_CAP)) { |
| call_conf.fields |= MNCC_F_CCCAP; |
| gsm48_decode_cccap(&call_conf.cccap, |
| TLVP_VAL(&tp, GSM48_IE_CC_CAP)-1); |
| } |
| |
| /* IMSI of called subscriber */ |
| osmo_strlcpy(call_conf.imsi, trans->vsub->imsi, sizeof(call_conf.imsi)); |
| |
| new_cc_state(trans, GSM_CSTATE_MO_TERM_CALL_CONF); |
| |
| /* Assign call (if not done yet) */ |
| if (trans->assignment_done == false) { |
| rc = msc_call_assignment(trans); |
| trans->assignment_done = true; |
| } |
| else |
| rc = 0; |
| |
| /* don't continue, if there were problems with |
| * the call assignment. */ |
| if (rc) |
| return rc; |
| |
| return mncc_recvmsg(trans->net, trans, MNCC_CALL_CONF_IND, |
| &call_conf); |
| } |
| |
| static int gsm48_cc_tx_call_proc_and_assign(struct gsm_trans *trans, void *arg) |
| { |
| struct gsm_mncc *proceeding = arg; |
| struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 CC PROC"); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| int rc; |
| |
| gh->msg_type = GSM48_MT_CC_CALL_PROC; |
| |
| new_cc_state(trans, GSM_CSTATE_MO_CALL_PROC); |
| |
| /* bearer capability */ |
| if (proceeding->fields & MNCC_F_BEARER_CAP) |
| gsm48_encode_bearer_cap(msg, 0, &proceeding->bearer_cap); |
| /* facility */ |
| if (proceeding->fields & MNCC_F_FACILITY) |
| gsm48_encode_facility(msg, 0, &proceeding->facility); |
| /* progress */ |
| if (proceeding->fields & MNCC_F_PROGRESS) |
| gsm48_encode_progress(msg, 0, &proceeding->progress); |
| |
| rc = gsm48_conn_sendmsg(msg, trans->conn, trans); |
| if (rc) |
| return rc; |
| |
| /* Assign call (if not done yet) */ |
| if (trans->assignment_done == false) { |
| rc = msc_call_assignment(trans); |
| trans->assignment_done = true; |
| } |
| else |
| rc = 0; |
| |
| return rc; |
| } |
| |
| static int gsm48_cc_rx_alerting(struct gsm_trans *trans, struct msgb *msg) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh); |
| struct tlv_parsed tp; |
| struct gsm_mncc alerting; |
| |
| gsm48_stop_cc_timer(trans); |
| gsm48_start_cc_timer(trans, 0x301, GSM48_T301); |
| |
| memset(&alerting, 0, sizeof(struct gsm_mncc)); |
| alerting.callref = trans->callref; |
| tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, 0, 0); |
| /* facility */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_FACILITY)) { |
| alerting.fields |= MNCC_F_FACILITY; |
| gsm48_decode_facility(&alerting.facility, |
| TLVP_VAL(&tp, GSM48_IE_FACILITY)-1); |
| } |
| |
| /* progress */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_PROGR_IND)) { |
| alerting.fields |= MNCC_F_PROGRESS; |
| gsm48_decode_progress(&alerting.progress, |
| TLVP_VAL(&tp, GSM48_IE_PROGR_IND)-1); |
| } |
| /* ss-version */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_SS_VERS)) { |
| alerting.fields |= MNCC_F_SSVERSION; |
| gsm48_decode_ssversion(&alerting.ssversion, |
| TLVP_VAL(&tp, GSM48_IE_SS_VERS)-1); |
| } |
| |
| new_cc_state(trans, GSM_CSTATE_CALL_RECEIVED); |
| |
| return mncc_recvmsg(trans->net, trans, MNCC_ALERT_IND, |
| &alerting); |
| } |
| |
| static int gsm48_cc_tx_alerting(struct gsm_trans *trans, void *arg) |
| { |
| struct gsm_mncc *alerting = arg; |
| struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 CC ALERT"); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| |
| gh->msg_type = GSM48_MT_CC_ALERTING; |
| |
| /* facility */ |
| if (alerting->fields & MNCC_F_FACILITY) |
| gsm48_encode_facility(msg, 0, &alerting->facility); |
| /* progress */ |
| if (alerting->fields & MNCC_F_PROGRESS) |
| gsm48_encode_progress(msg, 0, &alerting->progress); |
| /* user-user */ |
| if (alerting->fields & MNCC_F_USERUSER) |
| gsm48_encode_useruser(msg, 0, &alerting->useruser); |
| |
| new_cc_state(trans, GSM_CSTATE_CALL_DELIVERED); |
| |
| return gsm48_conn_sendmsg(msg, trans->conn, trans); |
| } |
| |
| static int gsm48_cc_tx_progress(struct gsm_trans *trans, void *arg) |
| { |
| struct gsm_mncc *progress = arg; |
| struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 CC PROGRESS"); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| |
| gh->msg_type = GSM48_MT_CC_PROGRESS; |
| |
| /* progress */ |
| gsm48_encode_progress(msg, 1, &progress->progress); |
| /* user-user */ |
| if (progress->fields & MNCC_F_USERUSER) |
| gsm48_encode_useruser(msg, 0, &progress->useruser); |
| |
| return gsm48_conn_sendmsg(msg, trans->conn, trans); |
| } |
| |
| static int gsm48_cc_tx_connect(struct gsm_trans *trans, void *arg) |
| { |
| struct gsm_mncc *connect = arg; |
| struct msgb *msg = gsm48_msgb_alloc_name("GSN 04.08 CC CON"); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| |
| gh->msg_type = GSM48_MT_CC_CONNECT; |
| |
| gsm48_stop_cc_timer(trans); |
| gsm48_start_cc_timer(trans, 0x313, GSM48_T313); |
| |
| /* facility */ |
| if (connect->fields & MNCC_F_FACILITY) |
| gsm48_encode_facility(msg, 0, &connect->facility); |
| /* progress */ |
| if (connect->fields & MNCC_F_PROGRESS) |
| gsm48_encode_progress(msg, 0, &connect->progress); |
| /* connected number */ |
| if (connect->fields & MNCC_F_CONNECTED) |
| gsm48_encode_connected(msg, &connect->connected); |
| /* user-user */ |
| if (connect->fields & MNCC_F_USERUSER) |
| gsm48_encode_useruser(msg, 0, &connect->useruser); |
| |
| new_cc_state(trans, GSM_CSTATE_CONNECT_IND); |
| |
| return gsm48_conn_sendmsg(msg, trans->conn, trans); |
| } |
| |
| static int gsm48_cc_rx_connect(struct gsm_trans *trans, struct msgb *msg) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh); |
| struct tlv_parsed tp; |
| struct gsm_mncc connect; |
| |
| gsm48_stop_cc_timer(trans); |
| |
| memset(&connect, 0, sizeof(struct gsm_mncc)); |
| connect.callref = trans->callref; |
| tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, 0, 0); |
| /* use subscriber as connected party number */ |
| connect.fields |= MNCC_F_CONNECTED; |
| osmo_strlcpy(connect.connected.number, trans->vsub->msisdn, sizeof(connect.connected.number)); |
| osmo_strlcpy(connect.imsi, trans->vsub->imsi, sizeof(connect.imsi)); |
| |
| /* facility */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_FACILITY)) { |
| connect.fields |= MNCC_F_FACILITY; |
| gsm48_decode_facility(&connect.facility, |
| TLVP_VAL(&tp, GSM48_IE_FACILITY)-1); |
| } |
| /* user-user */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_USER_USER)) { |
| connect.fields |= MNCC_F_USERUSER; |
| gsm48_decode_useruser(&connect.useruser, |
| TLVP_VAL(&tp, GSM48_IE_USER_USER)-1); |
| } |
| /* ss-version */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_SS_VERS)) { |
| connect.fields |= MNCC_F_SSVERSION; |
| gsm48_decode_ssversion(&connect.ssversion, |
| TLVP_VAL(&tp, GSM48_IE_SS_VERS)-1); |
| } |
| |
| new_cc_state(trans, GSM_CSTATE_CONNECT_REQUEST); |
| rate_ctr_inc(&trans->net->msc_ctrs->ctr[MSC_CTR_CALL_MT_CONNECT]); |
| |
| return mncc_recvmsg(trans->net, trans, MNCC_SETUP_CNF, &connect); |
| } |
| |
| |
| static int gsm48_cc_rx_connect_ack(struct gsm_trans *trans, struct msgb *msg) |
| { |
| struct gsm_mncc connect_ack; |
| |
| gsm48_stop_cc_timer(trans); |
| |
| new_cc_state(trans, GSM_CSTATE_ACTIVE); |
| rate_ctr_inc(&trans->net->msc_ctrs->ctr[MSC_CTR_CALL_MO_CONNECT_ACK]); |
| |
| memset(&connect_ack, 0, sizeof(struct gsm_mncc)); |
| connect_ack.callref = trans->callref; |
| |
| return mncc_recvmsg(trans->net, trans, MNCC_SETUP_COMPL_IND, |
| &connect_ack); |
| } |
| |
| static int gsm48_cc_tx_connect_ack(struct gsm_trans *trans, void *arg) |
| { |
| struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 CC CON ACK"); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| |
| gh->msg_type = GSM48_MT_CC_CONNECT_ACK; |
| |
| new_cc_state(trans, GSM_CSTATE_ACTIVE); |
| |
| return gsm48_conn_sendmsg(msg, trans->conn, trans); |
| } |
| |
| static int gsm48_cc_rx_disconnect(struct gsm_trans *trans, struct msgb *msg) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh); |
| struct tlv_parsed tp; |
| struct gsm_mncc disc; |
| |
| gsm48_stop_cc_timer(trans); |
| |
| new_cc_state(trans, GSM_CSTATE_DISCONNECT_REQ); |
| |
| memset(&disc, 0, sizeof(struct gsm_mncc)); |
| disc.callref = trans->callref; |
| tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, GSM48_IE_CAUSE, 0); |
| /* cause */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_CAUSE)) { |
| disc.fields |= MNCC_F_CAUSE; |
| gsm48_decode_cause(&disc.cause, |
| TLVP_VAL(&tp, GSM48_IE_CAUSE)-1); |
| } |
| /* facility */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_FACILITY)) { |
| disc.fields |= MNCC_F_FACILITY; |
| gsm48_decode_facility(&disc.facility, |
| TLVP_VAL(&tp, GSM48_IE_FACILITY)-1); |
| } |
| /* user-user */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_USER_USER)) { |
| disc.fields |= MNCC_F_USERUSER; |
| gsm48_decode_useruser(&disc.useruser, |
| TLVP_VAL(&tp, GSM48_IE_USER_USER)-1); |
| } |
| /* ss-version */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_SS_VERS)) { |
| disc.fields |= MNCC_F_SSVERSION; |
| gsm48_decode_ssversion(&disc.ssversion, |
| TLVP_VAL(&tp, GSM48_IE_SS_VERS)-1); |
| } |
| |
| return mncc_recvmsg(trans->net, trans, MNCC_DISC_IND, &disc); |
| |
| } |
| |
| static struct gsm_mncc_cause default_cause = { |
| .location = GSM48_CAUSE_LOC_PRN_S_LU, |
| .coding = 0, |
| .rec = 0, |
| .rec_val = 0, |
| .value = GSM48_CC_CAUSE_NORMAL_UNSPEC, |
| .diag_len = 0, |
| .diag = { 0 }, |
| }; |
| |
| static int gsm48_cc_tx_disconnect(struct gsm_trans *trans, void *arg) |
| { |
| struct gsm_mncc *disc = arg; |
| struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 CC DISC"); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| |
| gh->msg_type = GSM48_MT_CC_DISCONNECT; |
| |
| gsm48_stop_cc_timer(trans); |
| gsm48_start_cc_timer(trans, 0x306, GSM48_T306); |
| |
| /* cause */ |
| if (disc->fields & MNCC_F_CAUSE) |
| gsm48_encode_cause(msg, 1, &disc->cause); |
| else |
| gsm48_encode_cause(msg, 1, &default_cause); |
| |
| /* facility */ |
| if (disc->fields & MNCC_F_FACILITY) |
| gsm48_encode_facility(msg, 0, &disc->facility); |
| /* progress */ |
| if (disc->fields & MNCC_F_PROGRESS) |
| gsm48_encode_progress(msg, 0, &disc->progress); |
| /* user-user */ |
| if (disc->fields & MNCC_F_USERUSER) |
| gsm48_encode_useruser(msg, 0, &disc->useruser); |
| |
| /* store disconnect cause for T306 expiry */ |
| memcpy(&trans->cc.msg, disc, sizeof(struct gsm_mncc)); |
| |
| new_cc_state(trans, GSM_CSTATE_DISCONNECT_IND); |
| |
| return gsm48_conn_sendmsg(msg, trans->conn, trans); |
| } |
| |
| static int gsm48_cc_rx_release(struct gsm_trans *trans, struct msgb *msg) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh); |
| struct tlv_parsed tp; |
| struct gsm_mncc rel; |
| int rc; |
| |
| gsm48_stop_cc_timer(trans); |
| |
| memset(&rel, 0, sizeof(struct gsm_mncc)); |
| rel.callref = trans->callref; |
| tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, 0, 0); |
| /* cause */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_CAUSE)) { |
| rel.fields |= MNCC_F_CAUSE; |
| gsm48_decode_cause(&rel.cause, |
| TLVP_VAL(&tp, GSM48_IE_CAUSE)-1); |
| } |
| /* facility */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_FACILITY)) { |
| rel.fields |= MNCC_F_FACILITY; |
| gsm48_decode_facility(&rel.facility, |
| TLVP_VAL(&tp, GSM48_IE_FACILITY)-1); |
| } |
| /* user-user */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_USER_USER)) { |
| rel.fields |= MNCC_F_USERUSER; |
| gsm48_decode_useruser(&rel.useruser, |
| TLVP_VAL(&tp, GSM48_IE_USER_USER)-1); |
| } |
| /* ss-version */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_SS_VERS)) { |
| rel.fields |= MNCC_F_SSVERSION; |
| gsm48_decode_ssversion(&rel.ssversion, |
| TLVP_VAL(&tp, GSM48_IE_SS_VERS)-1); |
| } |
| |
| if (trans->cc.state == GSM_CSTATE_RELEASE_REQ) { |
| /* release collision 5.4.5 */ |
| rc = mncc_recvmsg(trans->net, trans, MNCC_REL_CNF, &rel); |
| } else { |
| rc = gsm48_tx_simple(trans->conn, |
| GSM48_PDISC_CC | (trans->transaction_id << 4), |
| GSM48_MT_CC_RELEASE_COMPL); |
| rc = mncc_recvmsg(trans->net, trans, MNCC_REL_IND, &rel); |
| } |
| |
| new_cc_state(trans, GSM_CSTATE_NULL); |
| |
| trans->callref = 0; |
| trans_free(trans); |
| |
| return rc; |
| } |
| |
| static int gsm48_cc_tx_release(struct gsm_trans *trans, void *arg) |
| { |
| struct gsm_mncc *rel = arg; |
| struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 CC REL"); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| |
| gh->msg_type = GSM48_MT_CC_RELEASE; |
| |
| gsm48_stop_cc_timer(trans); |
| gsm48_start_cc_timer(trans, 0x308, GSM48_T308); |
| |
| /* cause */ |
| if (rel->fields & MNCC_F_CAUSE) |
| gsm48_encode_cause(msg, 0, &rel->cause); |
| /* facility */ |
| if (rel->fields & MNCC_F_FACILITY) |
| gsm48_encode_facility(msg, 0, &rel->facility); |
| /* user-user */ |
| if (rel->fields & MNCC_F_USERUSER) |
| gsm48_encode_useruser(msg, 0, &rel->useruser); |
| |
| trans->cc.T308_second = 0; |
| memcpy(&trans->cc.msg, rel, sizeof(struct gsm_mncc)); |
| |
| if (trans->cc.state != GSM_CSTATE_RELEASE_REQ) |
| new_cc_state(trans, GSM_CSTATE_RELEASE_REQ); |
| |
| return gsm48_conn_sendmsg(msg, trans->conn, trans); |
| } |
| |
| static int gsm48_cc_rx_release_compl(struct gsm_trans *trans, struct msgb *msg) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh); |
| struct tlv_parsed tp; |
| struct gsm_mncc rel; |
| int rc = 0; |
| |
| gsm48_stop_cc_timer(trans); |
| |
| memset(&rel, 0, sizeof(struct gsm_mncc)); |
| rel.callref = trans->callref; |
| tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, 0, 0); |
| /* cause */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_CAUSE)) { |
| rel.fields |= MNCC_F_CAUSE; |
| gsm48_decode_cause(&rel.cause, |
| TLVP_VAL(&tp, GSM48_IE_CAUSE)-1); |
| } |
| /* facility */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_FACILITY)) { |
| rel.fields |= MNCC_F_FACILITY; |
| gsm48_decode_facility(&rel.facility, |
| TLVP_VAL(&tp, GSM48_IE_FACILITY)-1); |
| } |
| /* user-user */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_USER_USER)) { |
| rel.fields |= MNCC_F_USERUSER; |
| gsm48_decode_useruser(&rel.useruser, |
| TLVP_VAL(&tp, GSM48_IE_USER_USER)-1); |
| } |
| /* ss-version */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_SS_VERS)) { |
| rel.fields |= MNCC_F_SSVERSION; |
| gsm48_decode_ssversion(&rel.ssversion, |
| TLVP_VAL(&tp, GSM48_IE_SS_VERS)-1); |
| } |
| |
| if (trans->callref) { |
| switch (trans->cc.state) { |
| case GSM_CSTATE_CALL_PRESENT: |
| rc = mncc_recvmsg(trans->net, trans, |
| MNCC_REJ_IND, &rel); |
| break; |
| case GSM_CSTATE_RELEASE_REQ: |
| rc = mncc_recvmsg(trans->net, trans, |
| MNCC_REL_CNF, &rel); |
| break; |
| default: |
| rc = mncc_recvmsg(trans->net, trans, |
| MNCC_REL_IND, &rel); |
| } |
| } |
| |
| trans->callref = 0; |
| trans_free(trans); |
| |
| return rc; |
| } |
| |
| static int gsm48_cc_tx_release_compl(struct gsm_trans *trans, void *arg) |
| { |
| struct gsm_mncc *rel = arg; |
| struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 CC REL COMPL"); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| int ret; |
| |
| gh->msg_type = GSM48_MT_CC_RELEASE_COMPL; |
| |
| trans->callref = 0; |
| |
| gsm48_stop_cc_timer(trans); |
| |
| /* cause */ |
| if (rel->fields & MNCC_F_CAUSE) |
| gsm48_encode_cause(msg, 0, &rel->cause); |
| /* facility */ |
| if (rel->fields & MNCC_F_FACILITY) |
| gsm48_encode_facility(msg, 0, &rel->facility); |
| /* user-user */ |
| if (rel->fields & MNCC_F_USERUSER) |
| gsm48_encode_useruser(msg, 0, &rel->useruser); |
| |
| ret = gsm48_conn_sendmsg(msg, trans->conn, trans); |
| |
| trans_free(trans); |
| |
| return ret; |
| } |
| |
| static int gsm48_cc_rx_facility(struct gsm_trans *trans, struct msgb *msg) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh); |
| struct tlv_parsed tp; |
| struct gsm_mncc fac; |
| |
| memset(&fac, 0, sizeof(struct gsm_mncc)); |
| fac.callref = trans->callref; |
| tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, GSM48_IE_FACILITY, 0); |
| /* facility */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_FACILITY)) { |
| fac.fields |= MNCC_F_FACILITY; |
| gsm48_decode_facility(&fac.facility, |
| TLVP_VAL(&tp, GSM48_IE_FACILITY)-1); |
| } |
| /* ss-version */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_SS_VERS)) { |
| fac.fields |= MNCC_F_SSVERSION; |
| gsm48_decode_ssversion(&fac.ssversion, |
| TLVP_VAL(&tp, GSM48_IE_SS_VERS)-1); |
| } |
| |
| return mncc_recvmsg(trans->net, trans, MNCC_FACILITY_IND, &fac); |
| } |
| |
| static int gsm48_cc_tx_facility(struct gsm_trans *trans, void *arg) |
| { |
| struct gsm_mncc *fac = arg; |
| struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 CC FAC"); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| |
| gh->msg_type = GSM48_MT_CC_FACILITY; |
| |
| /* facility */ |
| gsm48_encode_facility(msg, 1, &fac->facility); |
| |
| return gsm48_conn_sendmsg(msg, trans->conn, trans); |
| } |
| |
| static int gsm48_cc_rx_hold(struct gsm_trans *trans, struct msgb *msg) |
| { |
| struct gsm_mncc hold; |
| |
| memset(&hold, 0, sizeof(struct gsm_mncc)); |
| hold.callref = trans->callref; |
| return mncc_recvmsg(trans->net, trans, MNCC_HOLD_IND, &hold); |
| } |
| |
| static int gsm48_cc_tx_hold_ack(struct gsm_trans *trans, void *arg) |
| { |
| struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 CC HLD ACK"); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| |
| gh->msg_type = GSM48_MT_CC_HOLD_ACK; |
| |
| return gsm48_conn_sendmsg(msg, trans->conn, trans); |
| } |
| |
| static int gsm48_cc_tx_hold_rej(struct gsm_trans *trans, void *arg) |
| { |
| struct gsm_mncc *hold_rej = arg; |
| struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 CC HLD REJ"); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| |
| gh->msg_type = GSM48_MT_CC_HOLD_REJ; |
| |
| /* cause */ |
| if (hold_rej->fields & MNCC_F_CAUSE) |
| gsm48_encode_cause(msg, 1, &hold_rej->cause); |
| else |
| gsm48_encode_cause(msg, 1, &default_cause); |
| |
| return gsm48_conn_sendmsg(msg, trans->conn, trans); |
| } |
| |
| static int gsm48_cc_rx_retrieve(struct gsm_trans *trans, struct msgb *msg) |
| { |
| struct gsm_mncc retrieve; |
| |
| memset(&retrieve, 0, sizeof(struct gsm_mncc)); |
| retrieve.callref = trans->callref; |
| return mncc_recvmsg(trans->net, trans, MNCC_RETRIEVE_IND, |
| &retrieve); |
| } |
| |
| static int gsm48_cc_tx_retrieve_ack(struct gsm_trans *trans, void *arg) |
| { |
| struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 CC RETR ACK"); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| |
| gh->msg_type = GSM48_MT_CC_RETR_ACK; |
| |
| return gsm48_conn_sendmsg(msg, trans->conn, trans); |
| } |
| |
| static int gsm48_cc_tx_retrieve_rej(struct gsm_trans *trans, void *arg) |
| { |
| struct gsm_mncc *retrieve_rej = arg; |
| struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 CC RETR REJ"); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| |
| gh->msg_type = GSM48_MT_CC_RETR_REJ; |
| |
| /* cause */ |
| if (retrieve_rej->fields & MNCC_F_CAUSE) |
| gsm48_encode_cause(msg, 1, &retrieve_rej->cause); |
| else |
| gsm48_encode_cause(msg, 1, &default_cause); |
| |
| return gsm48_conn_sendmsg(msg, trans->conn, trans); |
| } |
| |
| static int gsm48_cc_rx_start_dtmf(struct gsm_trans *trans, struct msgb *msg) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh); |
| struct tlv_parsed tp; |
| struct gsm_mncc dtmf; |
| |
| memset(&dtmf, 0, sizeof(struct gsm_mncc)); |
| dtmf.callref = trans->callref; |
| tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, 0, 0); |
| /* keypad facility */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_KPD_FACILITY)) { |
| dtmf.fields |= MNCC_F_KEYPAD; |
| gsm48_decode_keypad(&dtmf.keypad, |
| TLVP_VAL(&tp, GSM48_IE_KPD_FACILITY)-1); |
| } |
| |
| return mncc_recvmsg(trans->net, trans, MNCC_START_DTMF_IND, &dtmf); |
| } |
| |
| static int gsm48_cc_tx_start_dtmf_ack(struct gsm_trans *trans, void *arg) |
| { |
| struct gsm_mncc *dtmf = arg; |
| struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 DTMF ACK"); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| |
| gh->msg_type = GSM48_MT_CC_START_DTMF_ACK; |
| |
| /* keypad */ |
| if (dtmf->fields & MNCC_F_KEYPAD) |
| gsm48_encode_keypad(msg, dtmf->keypad); |
| |
| return gsm48_conn_sendmsg(msg, trans->conn, trans); |
| } |
| |
| static int gsm48_cc_tx_start_dtmf_rej(struct gsm_trans *trans, void *arg) |
| { |
| struct gsm_mncc *dtmf = arg; |
| struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 DTMF REJ"); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| |
| gh->msg_type = GSM48_MT_CC_START_DTMF_REJ; |
| |
| /* cause */ |
| if (dtmf->fields & MNCC_F_CAUSE) |
| gsm48_encode_cause(msg, 1, &dtmf->cause); |
| else |
| gsm48_encode_cause(msg, 1, &default_cause); |
| |
| return gsm48_conn_sendmsg(msg, trans->conn, trans); |
| } |
| |
| static int gsm48_cc_tx_stop_dtmf_ack(struct gsm_trans *trans, void *arg) |
| { |
| struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 DTMF STP ACK"); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| |
| gh->msg_type = GSM48_MT_CC_STOP_DTMF_ACK; |
| |
| return gsm48_conn_sendmsg(msg, trans->conn, trans); |
| } |
| |
| static int gsm48_cc_rx_stop_dtmf(struct gsm_trans *trans, struct msgb *msg) |
| { |
| struct gsm_mncc dtmf; |
| |
| memset(&dtmf, 0, sizeof(struct gsm_mncc)); |
| dtmf.callref = trans->callref; |
| |
| return mncc_recvmsg(trans->net, trans, MNCC_STOP_DTMF_IND, &dtmf); |
| } |
| |
| static int gsm48_cc_rx_modify(struct gsm_trans *trans, struct msgb *msg) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh); |
| struct tlv_parsed tp; |
| struct gsm_mncc modify; |
| |
| memset(&modify, 0, sizeof(struct gsm_mncc)); |
| modify.callref = trans->callref; |
| tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, GSM48_IE_BEARER_CAP, 0); |
| /* bearer capability */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_BEARER_CAP)) { |
| modify.fields |= MNCC_F_BEARER_CAP; |
| gsm48_decode_bearer_cap(&modify.bearer_cap, |
| TLVP_VAL(&tp, GSM48_IE_BEARER_CAP)-1); |
| |
| /* Create a copy of the bearer capability |
| * in the transaction struct, so we can use |
| * this information later */ |
| memcpy(&trans->bearer_cap,&modify.bearer_cap, |
| sizeof(trans->bearer_cap)); |
| } |
| |
| new_cc_state(trans, GSM_CSTATE_MO_ORIG_MODIFY); |
| |
| return mncc_recvmsg(trans->net, trans, MNCC_MODIFY_IND, &modify); |
| } |
| |
| static int gsm48_cc_tx_modify(struct gsm_trans *trans, void *arg) |
| { |
| struct gsm_mncc *modify = arg; |
| struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 CC MOD"); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| |
| gh->msg_type = GSM48_MT_CC_MODIFY; |
| |
| gsm48_start_cc_timer(trans, 0x323, GSM48_T323); |
| |
| /* bearer capability */ |
| gsm48_encode_bearer_cap(msg, 1, &modify->bearer_cap); |
| |
| new_cc_state(trans, GSM_CSTATE_MO_TERM_MODIFY); |
| |
| return gsm48_conn_sendmsg(msg, trans->conn, trans); |
| } |
| |
| static int gsm48_cc_rx_modify_complete(struct gsm_trans *trans, struct msgb *msg) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh); |
| struct tlv_parsed tp; |
| struct gsm_mncc modify; |
| |
| gsm48_stop_cc_timer(trans); |
| |
| memset(&modify, 0, sizeof(struct gsm_mncc)); |
| modify.callref = trans->callref; |
| tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, GSM48_IE_BEARER_CAP, 0); |
| /* bearer capability */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_BEARER_CAP)) { |
| modify.fields |= MNCC_F_BEARER_CAP; |
| gsm48_decode_bearer_cap(&modify.bearer_cap, |
| TLVP_VAL(&tp, GSM48_IE_BEARER_CAP)-1); |
| |
| /* Create a copy of the bearer capability |
| * in the transaction struct, so we can use |
| * this information later */ |
| memcpy(&trans->bearer_cap,&modify.bearer_cap, |
| sizeof(trans->bearer_cap)); |
| } |
| |
| new_cc_state(trans, GSM_CSTATE_ACTIVE); |
| |
| return mncc_recvmsg(trans->net, trans, MNCC_MODIFY_CNF, &modify); |
| } |
| |
| static int gsm48_cc_tx_modify_complete(struct gsm_trans *trans, void *arg) |
| { |
| struct gsm_mncc *modify = arg; |
| struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 CC MOD COMPL"); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| |
| gh->msg_type = GSM48_MT_CC_MODIFY_COMPL; |
| |
| /* bearer capability */ |
| gsm48_encode_bearer_cap(msg, 1, &modify->bearer_cap); |
| |
| new_cc_state(trans, GSM_CSTATE_ACTIVE); |
| |
| return gsm48_conn_sendmsg(msg, trans->conn, trans); |
| } |
| |
| static int gsm48_cc_rx_modify_reject(struct gsm_trans *trans, struct msgb *msg) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh); |
| struct tlv_parsed tp; |
| struct gsm_mncc modify; |
| |
| gsm48_stop_cc_timer(trans); |
| |
| memset(&modify, 0, sizeof(struct gsm_mncc)); |
| modify.callref = trans->callref; |
| tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, GSM48_IE_BEARER_CAP, GSM48_IE_CAUSE); |
| /* bearer capability */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_BEARER_CAP)) { |
| modify.fields |= GSM48_IE_BEARER_CAP; |
| gsm48_decode_bearer_cap(&modify.bearer_cap, |
| TLVP_VAL(&tp, GSM48_IE_BEARER_CAP)-1); |
| |
| /* Create a copy of the bearer capability |
| * in the transaction struct, so we can use |
| * this information later */ |
| memcpy(&trans->bearer_cap,&modify.bearer_cap, |
| sizeof(trans->bearer_cap)); |
| } |
| /* cause */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_CAUSE)) { |
| modify.fields |= MNCC_F_CAUSE; |
| gsm48_decode_cause(&modify.cause, |
| TLVP_VAL(&tp, GSM48_IE_CAUSE)-1); |
| } |
| |
| new_cc_state(trans, GSM_CSTATE_ACTIVE); |
| |
| return mncc_recvmsg(trans->net, trans, MNCC_MODIFY_REJ, &modify); |
| } |
| |
| static int gsm48_cc_tx_modify_reject(struct gsm_trans *trans, void *arg) |
| { |
| struct gsm_mncc *modify = arg; |
| struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 CC MOD REJ"); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| |
| gh->msg_type = GSM48_MT_CC_MODIFY_REJECT; |
| |
| /* bearer capability */ |
| gsm48_encode_bearer_cap(msg, 1, &modify->bearer_cap); |
| /* cause */ |
| gsm48_encode_cause(msg, 1, &modify->cause); |
| |
| new_cc_state(trans, GSM_CSTATE_ACTIVE); |
| |
| return gsm48_conn_sendmsg(msg, trans->conn, trans); |
| } |
| |
| static int gsm48_cc_tx_notify(struct gsm_trans *trans, void *arg) |
| { |
| struct gsm_mncc *notify = arg; |
| struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 CC NOT"); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| |
| gh->msg_type = GSM48_MT_CC_NOTIFY; |
| |
| /* notify */ |
| gsm48_encode_notify(msg, notify->notify); |
| |
| return gsm48_conn_sendmsg(msg, trans->conn, trans); |
| } |
| |
| static int gsm48_cc_rx_notify(struct gsm_trans *trans, struct msgb *msg) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh); |
| // struct tlv_parsed tp; |
| struct gsm_mncc notify; |
| |
| memset(¬ify, 0, sizeof(struct gsm_mncc)); |
| notify.callref = trans->callref; |
| // tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len); |
| if (payload_len >= 1) |
| gsm48_decode_notify(¬ify.notify, gh->data); |
| |
| return mncc_recvmsg(trans->net, trans, MNCC_NOTIFY_IND, ¬ify); |
| } |
| |
| static int gsm48_cc_tx_userinfo(struct gsm_trans *trans, void *arg) |
| { |
| struct gsm_mncc *user = arg; |
| struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 USR INFO"); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| |
| gh->msg_type = GSM48_MT_CC_USER_INFO; |
| |
| /* user-user */ |
| if (user->fields & MNCC_F_USERUSER) |
| gsm48_encode_useruser(msg, 1, &user->useruser); |
| /* more data */ |
| if (user->more) |
| gsm48_encode_more(msg); |
| |
| return gsm48_conn_sendmsg(msg, trans->conn, trans); |
| } |
| |
| static int gsm48_cc_rx_userinfo(struct gsm_trans *trans, struct msgb *msg) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh); |
| struct tlv_parsed tp; |
| struct gsm_mncc user; |
| |
| memset(&user, 0, sizeof(struct gsm_mncc)); |
| user.callref = trans->callref; |
| tlv_parse(&tp, &gsm48_att_tlvdef, gh->data, payload_len, GSM48_IE_USER_USER, 0); |
| /* user-user */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_USER_USER)) { |
| user.fields |= MNCC_F_USERUSER; |
| gsm48_decode_useruser(&user.useruser, |
| TLVP_VAL(&tp, GSM48_IE_USER_USER)-1); |
| } |
| /* more data */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_MORE_DATA)) |
| user.more = 1; |
| |
| return mncc_recvmsg(trans->net, trans, MNCC_USERINFO_IND, &user); |
| } |
| |
| static void mncc_recv_rtp(struct gsm_network *net, uint32_t callref, |
| int cmd, uint32_t addr, uint16_t port, uint32_t payload_type, |
| uint32_t payload_msg_type) |
| { |
| uint8_t data[sizeof(struct gsm_mncc)]; |
| struct gsm_mncc_rtp *rtp; |
| |
| memset(&data, 0, sizeof(data)); |
| rtp = (struct gsm_mncc_rtp *) &data[0]; |
| |
| rtp->callref = callref; |
| rtp->msg_type = cmd; |
| rtp->ip = addr; |
| rtp->port = port; |
| rtp->payload_type = payload_type; |
| rtp->payload_msg_type = payload_msg_type; |
| mncc_recvmsg(net, NULL, cmd, (struct gsm_mncc *)data); |
| } |
| |
| static void mncc_recv_rtp_sock(struct gsm_network *net, struct gsm_trans *trans, int cmd) |
| { |
| int msg_type; |
| |
| /* FIXME This has to be set to some meaningful value. |
| * Possible options are: |
| * GSM_TCHF_FRAME, GSM_TCHF_FRAME_EFR, |
| * GSM_TCHH_FRAME, GSM_TCH_FRAME_AMR |
| * (0 if unknown) */ |
| msg_type = GSM_TCHF_FRAME; |
| |
| uint32_t addr = mgcpgw_client_remote_addr_n(net->mgcpgw.client); |
| uint16_t port = trans->conn->rtp.port_cn; |
| |
| /* FIXME: This has to be set to some meaningful value, |
| * before the MSC-Split, this value was pulled from |
| * lchan->abis_ip.rtp_payload */ |
| uint32_t payload_type = 0; |
| |
| return mncc_recv_rtp(net, trans->callref, cmd, |
| addr, |
| port, |
| payload_type, |
| msg_type); |
| } |
| |
| static void mncc_recv_rtp_err(struct gsm_network *net, uint32_t callref, int cmd) |
| { |
| return mncc_recv_rtp(net, callref, cmd, 0, 0, 0, 0); |
| } |
| |
| static int tch_rtp_create(struct gsm_network *net, uint32_t callref) |
| { |
| struct gsm_trans *trans; |
| int rc; |
| |
| /* Find callref */ |
| trans = trans_find_by_callref(net, callref); |
| if (!trans) { |
| LOGP(DMNCC, LOGL_ERROR, "RTP create for non-existing trans\n"); |
| mncc_recv_rtp_err(net, callref, MNCC_RTP_CREATE); |
| return -EIO; |
| } |
| log_set_context(LOG_CTX_VLR_SUBSCR, trans->vsub); |
| if (!trans->conn) { |
| LOGP(DMNCC, LOGL_NOTICE, "RTP create for trans without conn\n"); |
| mncc_recv_rtp_err(net, callref, MNCC_RTP_CREATE); |
| return 0; |
| } |
| |
| trans->conn->mncc_rtp_bridge = 1; |
| |
| /* When we call msc_call_assignment() we will trigger, depending |
| * on the RAN type the call assignment on the A or Iu interface. |
| * msc_call_assignment() also takes care about sending the CRCX |
| * command to the MGCP-GW. The CRCX will return the port number, |
| * where the PBX (e.g. Asterisk) will send its RTP stream to. We |
| * have to return this port number back to the MNCC by sending |
| * it back with the TCH_RTP_CREATE message. To make sure that |
| * this message is sent AFTER the response to CRCX from the |
| * MGCP-GW has arrived, we need will instruct msc_call_assignment() |
| * to take care of this by setting trans->tch_rtp_create to true. |
| * This will make sure that gsm48_tch_rtp_create() (below) is |
| * called as soon as the local port number has become known. */ |
| trans->tch_rtp_create = true; |
| |
| /* Assign call (if not done yet) */ |
| if (trans->assignment_done == false) { |
| rc = msc_call_assignment(trans); |
| trans->assignment_done = true; |
| } |
| else |
| rc = 0; |
| |
| return rc; |
| } |
| |
| /* Trigger TCH_RTP_CREATE acknowledgement */ |
| int gsm48_tch_rtp_create(struct gsm_trans *trans) |
| { |
| /* This function is called as soon as the port, on which the |
| * mgcp-gw expects the incoming RTP stream from the remote |
| * end (e.g. Asterisk) is known. */ |
| |
| struct gsm_subscriber_connection *conn = trans->conn; |
| struct gsm_network *network = conn->network; |
| |
| mncc_recv_rtp_sock(network, trans, MNCC_RTP_CREATE); |
| return 0; |
| } |
| |
| static int tch_rtp_connect(struct gsm_network *net, void *arg) |
| { |
| struct gsm_trans *trans; |
| struct gsm_mncc_rtp *rtp = arg; |
| |
| /* Find callref */ |
| trans = trans_find_by_callref(net, rtp->callref); |
| if (!trans) { |
| LOGP(DMNCC, LOGL_ERROR, "RTP connect for non-existing trans\n"); |
| mncc_recv_rtp_err(net, rtp->callref, MNCC_RTP_CONNECT); |
| return -EIO; |
| } |
| log_set_context(LOG_CTX_VLR_SUBSCR, trans->vsub); |
| if (!trans->conn) { |
| LOGP(DMNCC, LOGL_ERROR, "RTP connect for trans without conn\n"); |
| mncc_recv_rtp_err(net, rtp->callref, MNCC_RTP_CONNECT); |
| return 0; |
| } |
| |
| msc_call_connect(trans,rtp->port,rtp->ip); |
| return 0; |
| } |
| |
| static struct downstate { |
| uint32_t states; |
| int type; |
| int (*rout) (struct gsm_trans *trans, void *arg); |
| } downstatelist[] = { |
| /* mobile originating call establishment */ |
| {SBIT(GSM_CSTATE_INITIATED), /* 5.2.1.2 */ |
| MNCC_CALL_PROC_REQ, gsm48_cc_tx_call_proc_and_assign}, |
| {SBIT(GSM_CSTATE_INITIATED) | SBIT(GSM_CSTATE_MO_CALL_PROC), /* 5.2.1.2 | 5.2.1.5 */ |
| MNCC_ALERT_REQ, gsm48_cc_tx_alerting}, |
| {SBIT(GSM_CSTATE_INITIATED) | SBIT(GSM_CSTATE_MO_CALL_PROC) | SBIT(GSM_CSTATE_CALL_DELIVERED), /* 5.2.1.2 | 5.2.1.6 | 5.2.1.6 */ |
| MNCC_SETUP_RSP, gsm48_cc_tx_connect}, |
| {SBIT(GSM_CSTATE_MO_CALL_PROC), /* 5.2.1.4.2 */ |
| MNCC_PROGRESS_REQ, gsm48_cc_tx_progress}, |
| /* mobile terminating call establishment */ |
| {SBIT(GSM_CSTATE_NULL), /* 5.2.2.1 */ |
| MNCC_SETUP_REQ, gsm48_cc_tx_setup}, |
| {SBIT(GSM_CSTATE_CONNECT_REQUEST), |
| MNCC_SETUP_COMPL_REQ, gsm48_cc_tx_connect_ack}, |
| /* signalling during call */ |
| {SBIT(GSM_CSTATE_ACTIVE), |
| MNCC_NOTIFY_REQ, gsm48_cc_tx_notify}, |
| {ALL_STATES - SBIT(GSM_CSTATE_NULL) - SBIT(GSM_CSTATE_RELEASE_REQ), |
| MNCC_FACILITY_REQ, gsm48_cc_tx_facility}, |
| {ALL_STATES, |
| MNCC_START_DTMF_RSP, gsm48_cc_tx_start_dtmf_ack}, |
| {ALL_STATES, |
| MNCC_START_DTMF_REJ, gsm48_cc_tx_start_dtmf_rej}, |
| {ALL_STATES, |
| MNCC_STOP_DTMF_RSP, gsm48_cc_tx_stop_dtmf_ack}, |
| {SBIT(GSM_CSTATE_ACTIVE), |
| MNCC_HOLD_CNF, gsm48_cc_tx_hold_ack}, |
| {SBIT(GSM_CSTATE_ACTIVE), |
| MNCC_HOLD_REJ, gsm48_cc_tx_hold_rej}, |
| {SBIT(GSM_CSTATE_ACTIVE), |
| MNCC_RETRIEVE_CNF, gsm48_cc_tx_retrieve_ack}, |
| {SBIT(GSM_CSTATE_ACTIVE), |
| MNCC_RETRIEVE_REJ, gsm48_cc_tx_retrieve_rej}, |
| {SBIT(GSM_CSTATE_ACTIVE), |
| MNCC_MODIFY_REQ, gsm48_cc_tx_modify}, |
| {SBIT(GSM_CSTATE_MO_ORIG_MODIFY), |
| MNCC_MODIFY_RSP, gsm48_cc_tx_modify_complete}, |
| {SBIT(GSM_CSTATE_MO_ORIG_MODIFY), |
| MNCC_MODIFY_REJ, gsm48_cc_tx_modify_reject}, |
| {SBIT(GSM_CSTATE_ACTIVE), |
| MNCC_USERINFO_REQ, gsm48_cc_tx_userinfo}, |
| /* clearing */ |
| {SBIT(GSM_CSTATE_INITIATED), |
| MNCC_REJ_REQ, gsm48_cc_tx_release_compl}, |
| {ALL_STATES - SBIT(GSM_CSTATE_NULL) - SBIT(GSM_CSTATE_DISCONNECT_IND) - SBIT(GSM_CSTATE_RELEASE_REQ) - SBIT(GSM_CSTATE_DISCONNECT_REQ), /* 5.4.4 */ |
| MNCC_DISC_REQ, gsm48_cc_tx_disconnect}, |
| {ALL_STATES - SBIT(GSM_CSTATE_NULL) - SBIT(GSM_CSTATE_RELEASE_REQ), /* 5.4.3.2 */ |
| MNCC_REL_REQ, gsm48_cc_tx_release}, |
| }; |
| |
| #define DOWNSLLEN \ |
| (sizeof(downstatelist) / sizeof(struct downstate)) |
| |
| |
| int mncc_tx_to_cc(struct gsm_network *net, int msg_type, void *arg) |
| { |
| int i, rc = 0; |
| struct gsm_trans *trans = NULL, *transt; |
| struct gsm_subscriber_connection *conn = NULL; |
| struct gsm_mncc *data = arg, rel; |
| |
| DEBUGP(DMNCC, "receive message %s\n", get_mncc_name(msg_type)); |
| |
| /* handle special messages */ |
| switch(msg_type) { |
| case MNCC_BRIDGE: |
| rc = tch_bridge(net, arg); |
| if (rc < 0) |
| disconnect_bridge(net, arg, -rc); |
| return rc; |
| case MNCC_RTP_CREATE: |
| return tch_rtp_create(net, data->callref); |
| case MNCC_RTP_CONNECT: |
| return tch_rtp_connect(net, arg); |
| case MNCC_RTP_FREE: |
| /* unused right now */ |
| return -EIO; |
| |
| case MNCC_FRAME_DROP: |
| case MNCC_FRAME_RECV: |
| case GSM_TCHF_FRAME: |
| case GSM_TCHF_FRAME_EFR: |
| case GSM_TCHH_FRAME: |
| case GSM_TCH_FRAME_AMR: |
| LOGP(DMNCC, LOGL_ERROR, "RTP streams must be handled externally; %s not supported.\n", |
| get_mncc_name(msg_type)); |
| return -ENOTSUP; |
| } |
| |
| memset(&rel, 0, sizeof(struct gsm_mncc)); |
| rel.callref = data->callref; |
| |
| /* Find callref */ |
| trans = trans_find_by_callref(net, data->callref); |
| |
| /* Callref unknown */ |
| if (!trans) { |
| struct vlr_subscr *vsub; |
| |
| if (msg_type != MNCC_SETUP_REQ) { |
| DEBUGP(DCC, "(bts - trx - ts - ti -- sub %s) " |
| "Received '%s' from MNCC with " |
| "unknown callref %d\n", data->called.number, |
| get_mncc_name(msg_type), data->callref); |
| /* Invalid call reference */ |
| return mncc_release_ind(net, NULL, data->callref, |
| GSM48_CAUSE_LOC_PRN_S_LU, |
| GSM48_CC_CAUSE_INVAL_TRANS_ID); |
| } |
| if (!data->called.number[0] && !data->imsi[0]) { |
| DEBUGP(DCC, "(bts - trx - ts - ti) " |
| "Received '%s' from MNCC with " |
| "no number or IMSI\n", get_mncc_name(msg_type)); |
| /* Invalid number */ |
| return mncc_release_ind(net, NULL, data->callref, |
| GSM48_CAUSE_LOC_PRN_S_LU, |
| GSM48_CC_CAUSE_INV_NR_FORMAT); |
| } |
| /* New transaction due to setup, find subscriber */ |
| if (data->called.number[0]) |
| vsub = vlr_subscr_find_by_msisdn(net->vlr, |
| data->called.number); |
| else |
| vsub = vlr_subscr_find_by_imsi(net->vlr, data->imsi); |
| |
| /* update the subscriber we deal with */ |
| log_set_context(LOG_CTX_VLR_SUBSCR, vsub); |
| |
| /* If subscriber is not found */ |
| if (!vsub) { |
| DEBUGP(DCC, "(bts - trx - ts - ti -- sub %s) " |
| "Received '%s' from MNCC with " |
| "unknown subscriber %s\n", data->called.number, |
| get_mncc_name(msg_type), data->called.number); |
| /* Unknown subscriber */ |
| return mncc_release_ind(net, NULL, data->callref, |
| GSM48_CAUSE_LOC_PRN_S_LU, |
| GSM48_CC_CAUSE_UNASSIGNED_NR); |
| } |
| /* If subscriber is not "attached" */ |
| if (!vsub->lac) { |
| DEBUGP(DCC, "(bts - trx - ts - ti -- sub %s) " |
| "Received '%s' from MNCC with " |
| "detached subscriber %s\n", data->called.number, |
| get_mncc_name(msg_type), data->called.number); |
| vlr_subscr_put(vsub); |
| /* Temporarily out of order */ |
| return mncc_release_ind(net, NULL, data->callref, |
| GSM48_CAUSE_LOC_PRN_S_LU, |
| GSM48_CC_CAUSE_DEST_OOO); |
| } |
| /* Create transaction */ |
| trans = trans_alloc(net, vsub, GSM48_PDISC_CC, 0xff, data->callref); |
| if (!trans) { |
| DEBUGP(DCC, "No memory for trans.\n"); |
| vlr_subscr_put(vsub); |
| /* Ressource unavailable */ |
| mncc_release_ind(net, NULL, data->callref, |
| GSM48_CAUSE_LOC_PRN_S_LU, |
| GSM48_CC_CAUSE_RESOURCE_UNAVAIL); |
| return -ENOMEM; |
| } |
| |
| /* Find conn */ |
| conn = connection_for_subscr(vsub); |
| |
| /* If subscriber has no conn */ |
| if (!conn) { |
| /* find transaction with this subscriber already paging */ |
| llist_for_each_entry(transt, &net->trans_list, entry) { |
| /* Transaction of our conn? */ |
| if (transt == trans || |
| transt->vsub != vsub) |
| continue; |
| DEBUGP(DCC, "(bts - trx - ts - ti -- sub %s) " |
| "Received '%s' from MNCC with " |
| "unallocated channel, paging already " |
| "started for lac %d.\n", |
| data->called.number, |
| get_mncc_name(msg_type), vsub->lac); |
| vlr_subscr_put(vsub); |
| trans_free(trans); |
| return 0; |
| } |
| /* store setup information until paging succeeds */ |
| memcpy(&trans->cc.msg, data, sizeof(struct gsm_mncc)); |
| |
| /* Request a channel */ |
| trans->paging_request = subscr_request_conn( |
| vsub, |
| setup_trig_pag_evt, |
| trans, |
| "MNCC: establish call"); |
| if (!trans->paging_request) { |
| LOGP(DCC, LOGL_ERROR, "Failed to allocate paging token.\n"); |
| vlr_subscr_put(vsub); |
| trans_free(trans); |
| return 0; |
| } |
| vlr_subscr_put(vsub); |
| return 0; |
| } |
| |
| /* Assign conn */ |
| trans->conn = msc_subscr_conn_get(conn); |
| vlr_subscr_put(vsub); |
| } else { |
| /* update the subscriber we deal with */ |
| log_set_context(LOG_CTX_VLR_SUBSCR, trans->vsub); |
| } |
| |
| if (trans->conn) |
| conn = trans->conn; |
| |
| /* if paging did not respond yet */ |
| if (!conn) { |
| DEBUGP(DCC, "(sub %s) " |
| "Received '%s' from MNCC in paging state\n", |
| vlr_subscr_msisdn_or_name(trans->vsub), |
| get_mncc_name(msg_type)); |
| mncc_set_cause(&rel, GSM48_CAUSE_LOC_PRN_S_LU, |
| GSM48_CC_CAUSE_NORM_CALL_CLEAR); |
| if (msg_type == MNCC_REL_REQ) |
| rc = mncc_recvmsg(net, trans, MNCC_REL_CNF, &rel); |
| else |
| rc = mncc_recvmsg(net, trans, MNCC_REL_IND, &rel); |
| trans->callref = 0; |
| trans_free(trans); |
| return rc; |
| } |
| |
| DEBUGP(DCC, "(ti %02x sub %s) " |
| "Received '%s' from MNCC in state %d (%s)\n", |
| trans->transaction_id, |
| vlr_subscr_msisdn_or_name(trans->conn->vsub), |
| get_mncc_name(msg_type), trans->cc.state, |
| gsm48_cc_state_name(trans->cc.state)); |
| |
| /* Find function for current state and message */ |
| for (i = 0; i < DOWNSLLEN; i++) |
| if ((msg_type == downstatelist[i].type) |
| && ((1 << trans->cc.state) & downstatelist[i].states)) |
| break; |
| if (i == DOWNSLLEN) { |
| DEBUGP(DCC, "Message unhandled at this state.\n"); |
| return 0; |
| } |
| |
| rc = downstatelist[i].rout(trans, arg); |
| |
| return rc; |
| } |
| |
| |
| static struct datastate { |
| uint32_t states; |
| int type; |
| int (*rout) (struct gsm_trans *trans, struct msgb *msg); |
| } datastatelist[] = { |
| /* mobile originating call establishment */ |
| {SBIT(GSM_CSTATE_NULL), /* 5.2.1.2 */ |
| GSM48_MT_CC_SETUP, gsm48_cc_rx_setup}, |
| {SBIT(GSM_CSTATE_NULL), /* 5.2.1.2 */ |
| GSM48_MT_CC_EMERG_SETUP, gsm48_cc_rx_setup}, |
| {SBIT(GSM_CSTATE_CONNECT_IND), /* 5.2.1.2 */ |
| GSM48_MT_CC_CONNECT_ACK, gsm48_cc_rx_connect_ack}, |
| /* mobile terminating call establishment */ |
| {SBIT(GSM_CSTATE_CALL_PRESENT), /* 5.2.2.3.2 */ |
| GSM48_MT_CC_CALL_CONF, gsm48_cc_rx_call_conf}, |
| {SBIT(GSM_CSTATE_CALL_PRESENT) | SBIT(GSM_CSTATE_MO_TERM_CALL_CONF), /* ???? | 5.2.2.3.2 */ |
| GSM48_MT_CC_ALERTING, gsm48_cc_rx_alerting}, |
| {SBIT(GSM_CSTATE_CALL_PRESENT) | SBIT(GSM_CSTATE_MO_TERM_CALL_CONF) | SBIT(GSM_CSTATE_CALL_RECEIVED), /* (5.2.2.6) | 5.2.2.6 | 5.2.2.6 */ |
| GSM48_MT_CC_CONNECT, gsm48_cc_rx_connect}, |
| /* signalling during call */ |
| {ALL_STATES - SBIT(GSM_CSTATE_NULL), |
| GSM48_MT_CC_FACILITY, gsm48_cc_rx_facility}, |
| {SBIT(GSM_CSTATE_ACTIVE), |
| GSM48_MT_CC_NOTIFY, gsm48_cc_rx_notify}, |
| {ALL_STATES, |
| GSM48_MT_CC_START_DTMF, gsm48_cc_rx_start_dtmf}, |
| {ALL_STATES, |
| GSM48_MT_CC_STOP_DTMF, gsm48_cc_rx_stop_dtmf}, |
| {ALL_STATES, |
| GSM48_MT_CC_STATUS_ENQ, gsm48_cc_rx_status_enq}, |
| {SBIT(GSM_CSTATE_ACTIVE), |
| GSM48_MT_CC_HOLD, gsm48_cc_rx_hold}, |
| {SBIT(GSM_CSTATE_ACTIVE), |
| GSM48_MT_CC_RETR, gsm48_cc_rx_retrieve}, |
| {SBIT(GSM_CSTATE_ACTIVE), |
| GSM48_MT_CC_MODIFY, gsm48_cc_rx_modify}, |
| {SBIT(GSM_CSTATE_MO_TERM_MODIFY), |
| GSM48_MT_CC_MODIFY_COMPL, gsm48_cc_rx_modify_complete}, |
| {SBIT(GSM_CSTATE_MO_TERM_MODIFY), |
| GSM48_MT_CC_MODIFY_REJECT, gsm48_cc_rx_modify_reject}, |
| {SBIT(GSM_CSTATE_ACTIVE), |
| GSM48_MT_CC_USER_INFO, gsm48_cc_rx_userinfo}, |
| /* clearing */ |
| {ALL_STATES - SBIT(GSM_CSTATE_NULL) - SBIT(GSM_CSTATE_RELEASE_REQ), /* 5.4.3.2 */ |
| GSM48_MT_CC_DISCONNECT, gsm48_cc_rx_disconnect}, |
| {ALL_STATES - SBIT(GSM_CSTATE_NULL), /* 5.4.4.1.2.2 */ |
| GSM48_MT_CC_RELEASE, gsm48_cc_rx_release}, |
| {ALL_STATES, /* 5.4.3.4 */ |
| GSM48_MT_CC_RELEASE_COMPL, gsm48_cc_rx_release_compl}, |
| }; |
| |
| #define DATASLLEN \ |
| (sizeof(datastatelist) / sizeof(struct datastate)) |
| |
| static int gsm0408_rcv_cc(struct gsm_subscriber_connection *conn, struct msgb *msg) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| uint8_t msg_type = gsm48_hdr_msg_type(gh); |
| uint8_t transaction_id = gsm48_hdr_trans_id_flip_ti(gh); |
| struct gsm_trans *trans = NULL; |
| int i, rc = 0; |
| |
| if (msg_type & 0x80) { |
| DEBUGP(DCC, "MSG 0x%2x not defined for PD error\n", msg_type); |
| return -EINVAL; |
| } |
| |
| if (!conn->vsub) { |
| LOGP(DCC, LOGL_ERROR, "Invalid conn: no subscriber\n"); |
| return -EINVAL; |
| } |
| |
| /* Find transaction */ |
| trans = trans_find_by_id(conn, GSM48_PDISC_CC, transaction_id); |
| |
| #if BEFORE_MSCSPLIT |
| /* Re-enable this log output once we can obtain this information via |
| * A-interface, see OS#2391. */ |
| DEBUGP(DCC, "(bts %d trx %d ts %d ti %x sub %s) " |
| "Received '%s' from MS in state %d (%s)\n", |
| conn->bts->nr, conn->lchan->ts->trx->nr, conn->lchan->ts->nr, |
| transaction_id, vlr_subscr_msisdn_or_name(conn->vsub), |
| gsm48_cc_msg_name(msg_type), trans?(trans->cc.state):0, |
| gsm48_cc_state_name(trans?(trans->cc.state):0)); |
| #endif |
| |
| /* Create transaction */ |
| if (!trans) { |
| DEBUGP(DCC, "Unknown transaction ID %x, " |
| "creating new trans.\n", transaction_id); |
| /* Create transaction */ |
| trans = trans_alloc(conn->network, conn->vsub, |
| GSM48_PDISC_CC, |
| transaction_id, new_callref++); |
| if (!trans) { |
| DEBUGP(DCC, "No memory for trans.\n"); |
| rc = gsm48_tx_simple(conn, |
| GSM48_PDISC_CC | (transaction_id << 4), |
| GSM48_MT_CC_RELEASE_COMPL); |
| return -ENOMEM; |
| } |
| /* Assign transaction */ |
| trans->conn = msc_subscr_conn_get(conn); |
| cm_service_request_concludes(conn, msg); |
| } |
| |
| /* find function for current state and message */ |
| for (i = 0; i < DATASLLEN; i++) |
| if ((msg_type == datastatelist[i].type) |
| && ((1 << trans->cc.state) & datastatelist[i].states)) |
| break; |
| if (i == DATASLLEN) { |
| DEBUGP(DCC, "Message unhandled at this state.\n"); |
| return 0; |
| } |
| |
| assert(trans->vsub); |
| |
| rc = datastatelist[i].rout(trans, msg); |
| |
| msc_subscr_conn_communicating(conn); |
| return rc; |
| } |
| |
| static bool msg_is_initially_permitted(const struct gsm48_hdr *hdr) |
| { |
| uint8_t pdisc = gsm48_hdr_pdisc(hdr); |
| uint8_t msg_type = gsm48_hdr_msg_type(hdr); |
| |
| switch (pdisc) { |
| case GSM48_PDISC_MM: |
| switch (msg_type) { |
| case GSM48_MT_MM_LOC_UPD_REQUEST: |
| case GSM48_MT_MM_CM_SERV_REQ: |
| case GSM48_MT_MM_AUTH_RESP: |
| case GSM48_MT_MM_AUTH_FAIL: |
| case GSM48_MT_MM_ID_RESP: |
| case GSM48_MT_MM_TMSI_REALL_COMPL: |
| case GSM48_MT_MM_IMSI_DETACH_IND: |
| return true; |
| default: |
| break; |
| } |
| break; |
| case GSM48_PDISC_RR: |
| switch (msg_type) { |
| case GSM48_MT_RR_CIPH_M_COMPL: |
| case GSM48_MT_RR_PAG_RESP: |
| return true; |
| default: |
| break; |
| } |
| break; |
| default: |
| break; |
| } |
| |
| return false; |
| } |
| |
| void cm_service_request_concludes(struct gsm_subscriber_connection *conn, |
| struct msgb *msg) |
| { |
| |
| /* If a CM Service Request was received before, this is the request the |
| * conn was opened for. No need to wait for further messages. */ |
| |
| if (!conn->received_cm_service_request) |
| return; |
| |
| if (log_check_level(DMM, LOGL_DEBUG)) { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| uint8_t pdisc = gsm48_hdr_pdisc(gh); |
| uint8_t msg_type = gsm48_hdr_msg_type(gh); |
| |
| DEBUGP(DMM, "%s: rx msg %s:" |
| " received_cm_service_request changes to false\n", |
| vlr_subscr_name(conn->vsub), |
| gsm48_pdisc_msgtype_name(pdisc, msg_type)); |
| } |
| conn->received_cm_service_request = false; |
| } |
| |
| |
| /* Main entry point for GSM 04.08/44.008 Layer 3 data (e.g. from the BSC). */ |
| int gsm0408_dispatch(struct gsm_subscriber_connection *conn, struct msgb *msg) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| uint8_t pdisc = gsm48_hdr_pdisc(gh); |
| int rc = 0; |
| |
| OSMO_ASSERT(conn); |
| OSMO_ASSERT(msg); |
| |
| LOGP(DRLL, LOGL_DEBUG, "Dispatching 04.08 message %s (0x%x:0x%x)\n", |
| gsm48_pdisc_msgtype_name(pdisc, gsm48_hdr_msg_type(gh)), |
| pdisc, gsm48_hdr_msg_type(gh)); |
| |
| if (!msc_subscr_conn_is_accepted(conn) |
| && !msg_is_initially_permitted(gh)) { |
| LOGP(DRLL, LOGL_ERROR, |
| "subscr %s: Message not permitted for initial conn: %s\n", |
| vlr_subscr_name(conn->vsub), |
| gsm48_pdisc_msgtype_name(pdisc, gsm48_hdr_msg_type(gh))); |
| return -EACCES; |
| } |
| |
| if (conn->vsub && conn->vsub->cs.attached_via_ran != conn->via_ran) { |
| LOGP(DMM, LOGL_ERROR, |
| "%s: Illegal situation: RAN type mismatch:" |
| " attached via %s, received message via %s\n", |
| vlr_subscr_name(conn->vsub), |
| ran_type_name(conn->vsub->cs.attached_via_ran), |
| ran_type_name(conn->via_ran)); |
| return -EACCES; |
| } |
| |
| #if 0 |
| if (silent_call_reroute(conn, msg)) |
| return silent_call_rx(conn, msg); |
| #endif |
| |
| switch (pdisc) { |
| case GSM48_PDISC_CC: |
| rc = gsm0408_rcv_cc(conn, msg); |
| break; |
| case GSM48_PDISC_MM: |
| rc = gsm0408_rcv_mm(conn, msg); |
| break; |
| case GSM48_PDISC_RR: |
| rc = gsm0408_rcv_rr(conn, msg); |
| break; |
| case GSM48_PDISC_SMS: |
| rc = gsm0411_rcv_sms(conn, msg); |
| break; |
| case GSM48_PDISC_MM_GPRS: |
| case GSM48_PDISC_SM_GPRS: |
| LOGP(DRLL, LOGL_NOTICE, "Unimplemented " |
| "GSM 04.08 discriminator 0x%02x\n", pdisc); |
| rc = -ENOTSUP; |
| break; |
| case GSM48_PDISC_NC_SS: |
| rc = handle_rcv_ussd(conn, msg); |
| break; |
| case GSM48_PDISC_TEST: |
| rc = gsm0414_rcv_test(conn, msg); |
| break; |
| default: |
| LOGP(DRLL, LOGL_NOTICE, "Unknown " |
| "GSM 04.08 discriminator 0x%02x\n", pdisc); |
| rc = -EINVAL; |
| break; |
| } |
| |
| return rc; |
| } |
| |
| /*********************************************************************** |
| * VLR integration |
| ***********************************************************************/ |
| |
| /* VLR asks us to send an authentication request */ |
| static int msc_vlr_tx_auth_req(void *msc_conn_ref, struct gsm_auth_tuple *at, |
| bool send_autn) |
| { |
| struct gsm_subscriber_connection *conn = msc_conn_ref; |
| return gsm48_tx_mm_auth_req(conn, at->vec.rand, |
| send_autn? at->vec.autn : NULL, |
| at->key_seq); |
| } |
| |
| /* VLR asks us to send an authentication reject */ |
| static int msc_vlr_tx_auth_rej(void *msc_conn_ref) |
| { |
| struct gsm_subscriber_connection *conn = msc_conn_ref; |
| return gsm48_tx_mm_auth_rej(conn); |
| } |
| |
| /* VLR asks us to transmit an Identity Request of given type */ |
| static int msc_vlr_tx_id_req(void *msc_conn_ref, uint8_t mi_type) |
| { |
| struct gsm_subscriber_connection *conn = msc_conn_ref; |
| return mm_tx_identity_req(conn, mi_type); |
| } |
| |
| /* VLR asks us to transmit a Location Update Accept */ |
| static int msc_vlr_tx_lu_acc(void *msc_conn_ref, uint32_t send_tmsi) |
| { |
| struct gsm_subscriber_connection *conn = msc_conn_ref; |
| return gsm0408_loc_upd_acc(conn, send_tmsi); |
| } |
| |
| /* VLR asks us to transmit a Location Update Reject */ |
| static int msc_vlr_tx_lu_rej(void *msc_conn_ref, uint8_t cause) |
| { |
| struct gsm_subscriber_connection *conn = msc_conn_ref; |
| return gsm0408_loc_upd_rej(conn, cause); |
| } |
| |
| /* VLR asks us to transmit a CM Service Accept */ |
| static int msc_vlr_tx_cm_serv_acc(void *msc_conn_ref) |
| { |
| struct gsm_subscriber_connection *conn = msc_conn_ref; |
| return msc_gsm48_tx_mm_serv_ack(conn); |
| } |
| |
| static int msc_vlr_tx_common_id(void *msc_conn_ref) |
| { |
| struct gsm_subscriber_connection *conn = msc_conn_ref; |
| return msc_tx_common_id(conn); |
| } |
| |
| /* VLR asks us to transmit a CM Service Reject */ |
| static int msc_vlr_tx_cm_serv_rej(void *msc_conn_ref, enum vlr_proc_arq_result result) |
| { |
| uint8_t cause; |
| struct gsm_subscriber_connection *conn = msc_conn_ref; |
| conn->received_cm_service_request = false; |
| |
| switch (result) { |
| default: |
| case VLR_PR_ARQ_RES_NONE: |
| case VLR_PR_ARQ_RES_SYSTEM_FAILURE: |
| case VLR_PR_ARQ_RES_UNKNOWN_ERROR: |
| cause = GSM48_REJECT_NETWORK_FAILURE; |
| break; |
| case VLR_PR_ARQ_RES_ILLEGAL_SUBSCR: |
| cause = GSM48_REJECT_LOC_NOT_ALLOWED; |
| break; |
| case VLR_PR_ARQ_RES_UNIDENT_SUBSCR: |
| cause = GSM48_REJECT_INVALID_MANDANTORY_INF; |
| break; |
| case VLR_PR_ARQ_RES_ROAMING_NOTALLOWED: |
| cause = GSM48_REJECT_ROAMING_NOT_ALLOWED; |
| break; |
| case VLR_PR_ARQ_RES_ILLEGAL_EQUIP: |
| cause = GSM48_REJECT_ILLEGAL_MS; |
| break; |
| case VLR_PR_ARQ_RES_TIMEOUT: |
| cause = GSM48_REJECT_CONGESTION; |
| break; |
| }; |
| |
| return msc_gsm48_tx_mm_serv_rej(conn, cause); |
| } |
| |
| /* VLR asks us to start using ciphering */ |
| static int msc_vlr_set_ciph_mode(void *msc_conn_ref, |
| enum vlr_ciph ciph, |
| bool retrieve_imeisv) |
| { |
| struct gsm_subscriber_connection *conn = msc_conn_ref; |
| struct vlr_subscr *vsub; |
| struct gsm_auth_tuple *tuple; |
| |
| if (!conn || !conn->vsub) { |
| LOGP(DMM, LOGL_ERROR, "Cannot send Ciphering Mode Command to" |
| " NULL conn/subscriber"); |
| return -EINVAL; |
| } |
| |
| vsub = conn->vsub; |
| tuple = vsub->last_tuple; |
| |
| if (!tuple) { |
| LOGP(DMM, LOGL_ERROR, "subscr %s: Cannot send Ciphering Mode" |
| " Command: no auth tuple available\n", |
| vlr_subscr_name(vsub)); |
| return -EINVAL; |
| } |
| |
| switch (conn->via_ran) { |
| case RAN_GERAN_A: |
| DEBUGP(DMM, "-> CIPHER MODE COMMAND %s\n", |
| vlr_subscr_name(conn->vsub)); |
| return a_iface_tx_cipher_mode(conn, ciph, tuple->vec.kc, 8, |
| retrieve_imeisv); |
| case RAN_UTRAN_IU: |
| #ifdef BUILD_IU |
| DEBUGP(DMM, "-> SECURITY MODE CONTROL %s\n", |
| vlr_subscr_name(conn->vsub)); |
| return iu_tx_sec_mode_cmd(conn->iu.ue_ctx, tuple, 0, 1); |
| #else |
| LOGP(DMM, LOGL_ERROR, "Cannot send Security Mode Control over RAN_UTRAN_IU," |
| " built without Iu support\n"); |
| return -ENOTSUP; |
| #endif |
| |
| default: |
| break; |
| } |
| LOGP(DMM, LOGL_ERROR, |
| "%s: cannot start ciphering, unknown RAN type %d\n", |
| vlr_subscr_name(conn->vsub), conn->via_ran); |
| return -ENOTSUP; |
| } |
| |
| void msc_rx_sec_mode_compl(struct gsm_subscriber_connection *conn) |
| { |
| struct vlr_ciph_result vlr_res = {}; |
| |
| if (!conn || !conn->vsub) { |
| LOGP(DMM, LOGL_ERROR, |
| "Rx Security Mode Complete for invalid conn\n"); |
| return; |
| } |
| |
| DEBUGP(DMM, "<- SECURITY MODE COMPLETE %s\n", |
| vlr_subscr_name(conn->vsub)); |
| |
| vlr_res.cause = VLR_CIPH_COMPL; |
| vlr_subscr_rx_ciph_res(conn->vsub, &vlr_res); |
| } |
| |
| /* VLR informs us that the subscriber data has somehow been modified */ |
| static void msc_vlr_subscr_update(struct vlr_subscr *subscr) |
| { |
| /* FIXME */ |
| } |
| |
| /* VLR informs us that the subscriber has been associated with a conn */ |
| static void msc_vlr_subscr_assoc(void *msc_conn_ref, |
| struct vlr_subscr *vsub) |
| { |
| struct gsm_subscriber_connection *conn = msc_conn_ref; |
| OSMO_ASSERT(!conn->vsub); |
| conn->vsub = vlr_subscr_get(vsub); |
| conn->vsub->cs.attached_via_ran = conn->via_ran; |
| } |
| |
| /* operations that we need to implement for libvlr */ |
| static const struct vlr_ops msc_vlr_ops = { |
| .tx_auth_req = msc_vlr_tx_auth_req, |
| .tx_auth_rej = msc_vlr_tx_auth_rej, |
| .tx_id_req = msc_vlr_tx_id_req, |
| .tx_lu_acc = msc_vlr_tx_lu_acc, |
| .tx_lu_rej = msc_vlr_tx_lu_rej, |
| .tx_cm_serv_acc = msc_vlr_tx_cm_serv_acc, |
| .tx_cm_serv_rej = msc_vlr_tx_cm_serv_rej, |
| .set_ciph_mode = msc_vlr_set_ciph_mode, |
| .tx_common_id = msc_vlr_tx_common_id, |
| .subscr_update = msc_vlr_subscr_update, |
| .subscr_assoc = msc_vlr_subscr_assoc, |
| }; |
| |
| /* Allocate net->vlr so that the VTY may configure the VLR's data structures */ |
| int msc_vlr_alloc(struct gsm_network *net) |
| { |
| net->vlr = vlr_alloc(net, &msc_vlr_ops); |
| if (!net->vlr) |
| return -ENOMEM; |
| net->vlr->user_ctx = net; |
| return 0; |
| } |
| |
| /* Launch the VLR, i.e. its GSUP connection */ |
| int msc_vlr_start(struct gsm_network *net) |
| { |
| OSMO_ASSERT(net->vlr); |
| return vlr_start("MSC", net->vlr, net->gsup_server_addr_str, |
| net->gsup_server_port); |
| } |