| /* 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) 2008-2009 by Harald Welte <laforge@gnumonks.org> |
| * (C) 2008, 2009 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 General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write to the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| */ |
| |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <errno.h> |
| #include <time.h> |
| #include <netinet/in.h> |
| |
| #include <openbsc/db.h> |
| #include <openbsc/msgb.h> |
| #include <openbsc/bitvec.h> |
| #include <openbsc/tlv.h> |
| #include <openbsc/debug.h> |
| #include <openbsc/gsm_data.h> |
| #include <openbsc/gsm_utils.h> |
| #include <openbsc/gsm_subscriber.h> |
| #include <openbsc/gsm_04_11.h> |
| #include <openbsc/gsm_04_08.h> |
| #include <openbsc/abis_rsl.h> |
| #include <openbsc/chan_alloc.h> |
| #include <openbsc/paging.h> |
| #include <openbsc/signal.h> |
| #include <openbsc/trau_frame.h> |
| #include <openbsc/trau_mux.h> |
| #include <openbsc/rtp_proxy.h> |
| #include <openbsc/talloc.h> |
| #include <openbsc/transaction.h> |
| #include <openbsc/ussd.h> |
| |
| #define GSM_MAX_FACILITY 128 |
| #define GSM_MAX_SSVERSION 128 |
| #define GSM_MAX_USERUSER 128 |
| |
| void *tall_locop_ctx; |
| |
| static const struct tlv_definition rsl_att_tlvdef = { |
| .def = { |
| [GSM48_IE_MOBILE_ID] = { TLV_TYPE_TLV }, |
| [GSM48_IE_NAME_LONG] = { TLV_TYPE_TLV }, |
| [GSM48_IE_NAME_SHORT] = { TLV_TYPE_TLV }, |
| [GSM48_IE_UTC] = { TLV_TYPE_TV }, |
| [GSM48_IE_NET_TIME_TZ] = { TLV_TYPE_FIXED, 7 }, |
| [GSM48_IE_LSA_IDENT] = { TLV_TYPE_TLV }, |
| |
| [GSM48_IE_BEARER_CAP] = { TLV_TYPE_TLV }, |
| [GSM48_IE_CAUSE] = { TLV_TYPE_TLV }, |
| [GSM48_IE_CC_CAP] = { TLV_TYPE_TLV }, |
| [GSM48_IE_ALERT] = { TLV_TYPE_TLV }, |
| [GSM48_IE_FACILITY] = { TLV_TYPE_TLV }, |
| [GSM48_IE_PROGR_IND] = { TLV_TYPE_TLV }, |
| [GSM48_IE_AUX_STATUS] = { TLV_TYPE_TLV }, |
| [GSM48_IE_NOTIFY] = { TLV_TYPE_TV }, |
| [GSM48_IE_KPD_FACILITY] = { TLV_TYPE_TV }, |
| [GSM48_IE_SIGNAL] = { TLV_TYPE_TV }, |
| [GSM48_IE_CONN_BCD] = { TLV_TYPE_TLV }, |
| [GSM48_IE_CONN_SUB] = { TLV_TYPE_TLV }, |
| [GSM48_IE_CALLING_BCD] = { TLV_TYPE_TLV }, |
| [GSM48_IE_CALLING_SUB] = { TLV_TYPE_TLV }, |
| [GSM48_IE_CALLED_BCD] = { TLV_TYPE_TLV }, |
| [GSM48_IE_CALLED_SUB] = { TLV_TYPE_TLV }, |
| [GSM48_IE_REDIR_BCD] = { TLV_TYPE_TLV }, |
| [GSM48_IE_REDIR_SUB] = { TLV_TYPE_TLV }, |
| [GSM48_IE_LOWL_COMPAT] = { TLV_TYPE_TLV }, |
| [GSM48_IE_HIGHL_COMPAT] = { TLV_TYPE_TLV }, |
| [GSM48_IE_USER_USER] = { TLV_TYPE_TLV }, |
| [GSM48_IE_SS_VERS] = { TLV_TYPE_TLV }, |
| [GSM48_IE_MORE_DATA] = { TLV_TYPE_T }, |
| [GSM48_IE_CLIR_SUPP] = { TLV_TYPE_T }, |
| [GSM48_IE_CLIR_INVOC] = { TLV_TYPE_T }, |
| [GSM48_IE_REV_C_SETUP] = { TLV_TYPE_T }, |
| [GSM48_IE_REPEAT_CIR] = { TLV_TYPE_T }, |
| [GSM48_IE_REPEAT_SEQ] = { TLV_TYPE_T }, |
| /* FIXME: more elements */ |
| }, |
| }; |
| |
| static const char *rr_cause_names[] = { |
| [GSM48_RR_CAUSE_NORMAL] = "Normal event", |
| [GSM48_RR_CAUSE_ABNORMAL_UNSPEC] = "Abnormal release, unspecified", |
| [GSM48_RR_CAUSE_ABNORMAL_UNACCT] = "Abnormal release, channel unacceptable", |
| [GSM48_RR_CAUSE_ABNORMAL_TIMER] = "Abnormal release, timer expired", |
| [GSM48_RR_CAUSE_ABNORMAL_NOACT] = "Abnormal release, no activity on radio path", |
| [GSM48_RR_CAUSE_PREMPTIVE_REL] = "Preemptive release", |
| [GSM48_RR_CAUSE_HNDOVER_IMP] = "Handover impossible, timing advance out of range", |
| [GSM48_RR_CAUSE_CHAN_MODE_UNACCT] = "Channel mode unacceptable", |
| [GSM48_RR_CAUSE_FREQ_NOT_IMPL] = "Frequency not implemented", |
| [GSM48_RR_CAUSE_CALL_CLEARED] = "Call already cleared", |
| [GSM48_RR_CAUSE_SEMANT_INCORR] = "Semantically incorrect message", |
| [GSM48_RR_CAUSE_INVALID_MAND_INF] = "Invalid mandatory information", |
| [GSM48_RR_CAUSE_MSG_TYPE_N] = "Message type non-existant or not implemented", |
| [GSM48_RR_CAUSE_MSG_TYPE_N_COMPAT] = "Message type not compatible with protocol state", |
| [GSM48_RR_CAUSE_COND_IE_ERROR] = "Conditional IE error", |
| [GSM48_RR_CAUSE_NO_CELL_ALLOC_A] = "No cell allocation available", |
| [GSM48_RR_CAUSE_PROT_ERROR_UNSPC] = "Protocol error unspecified", |
| }; |
| |
| static const char *cc_state_names[] = { |
| "NULL", |
| "INITIATED", |
| "illegal state 2", |
| "MO_CALL_PROC", |
| "CALL_DELIVERED", |
| "illegal state 5", |
| "CALL_PRESENT", |
| "CALL_RECEIVED", |
| "CONNECT_REQUEST", |
| "MO_TERM_CALL_CONF", |
| "ACTIVE", |
| "DISCONNECT_REQ", |
| "DISCONNECT_IND", |
| "illegal state 13", |
| "illegal state 14", |
| "illegal state 15", |
| "illegal state 16", |
| "illegal state 17", |
| "illegal state 18", |
| "RELEASE_REQ", |
| "illegal state 20", |
| "illegal state 21", |
| "illegal state 22", |
| "illegal state 23", |
| "illegal state 24", |
| "illegal state 25", |
| "MO_ORIG_MODIFY", |
| "MO_TERM_MODIFY", |
| "CONNECT_IND", |
| "illegal state 29", |
| "illegal state 30", |
| "illegal state 31", |
| }; |
| |
| static char strbuf[64]; |
| |
| static const char *rr_cause_name(u_int8_t cause) |
| { |
| if (cause < ARRAY_SIZE(rr_cause_names) && |
| rr_cause_names[cause]) |
| return rr_cause_names[cause]; |
| |
| snprintf(strbuf, sizeof(strbuf), "0x%02x", cause); |
| return strbuf; |
| } |
| |
| int gsm0408_loc_upd_acc(struct gsm_lchan *lchan, u_int32_t tmsi); |
| static int gsm48_tx_simple(struct gsm_lchan *lchan, |
| u_int8_t pdisc, u_int8_t msg_type); |
| static void schedule_reject(struct gsm_lchan *lchan); |
| |
| struct gsm_lai { |
| u_int16_t mcc; |
| u_int16_t mnc; |
| u_int16_t lac; |
| }; |
| |
| static u_int32_t new_callref = 0x80000001; |
| |
| static int authorize_subscriber(struct gsm_loc_updating_operation *loc, |
| struct gsm_subscriber *subscriber) |
| { |
| if (!subscriber) |
| return 0; |
| |
| /* |
| * Do not send accept yet as more information should arrive. Some |
| * phones will not send us the information and we will have to check |
| * what we want to do with that. |
| */ |
| if (loc && (loc->waiting_for_imsi || loc->waiting_for_imei)) |
| return 0; |
| |
| switch (subscriber->net->auth_policy) { |
| case GSM_AUTH_POLICY_CLOSED: |
| return subscriber->authorized; |
| case GSM_AUTH_POLICY_TOKEN: |
| if (subscriber->authorized) |
| return subscriber->authorized; |
| return (subscriber->flags & GSM_SUBSCRIBER_FIRST_CONTACT); |
| case GSM_AUTH_POLICY_ACCEPT_ALL: |
| return 1; |
| default: |
| return 0; |
| } |
| } |
| |
| static void release_loc_updating_req(struct gsm_lchan *lchan) |
| { |
| if (!lchan->loc_operation) |
| return; |
| |
| bsc_del_timer(&lchan->loc_operation->updating_timer); |
| talloc_free(lchan->loc_operation); |
| lchan->loc_operation = 0; |
| put_lchan(lchan); |
| } |
| |
| static void allocate_loc_updating_req(struct gsm_lchan *lchan) |
| { |
| use_lchan(lchan); |
| release_loc_updating_req(lchan); |
| |
| lchan->loc_operation = talloc_zero(tall_locop_ctx, |
| struct gsm_loc_updating_operation); |
| } |
| |
| static int gsm0408_authorize(struct gsm_lchan *lchan, struct msgb *msg) |
| { |
| if (authorize_subscriber(lchan->loc_operation, lchan->subscr)) { |
| int rc; |
| |
| db_subscriber_alloc_tmsi(lchan->subscr); |
| release_loc_updating_req(lchan); |
| rc = gsm0408_loc_upd_acc(msg->lchan, lchan->subscr->tmsi); |
| if (lchan->ts->trx->bts->network->send_mm_info) { |
| /* send MM INFO with network name */ |
| rc = gsm48_tx_mm_info(msg->lchan); |
| } |
| |
| /* call subscr_update after putting the loc_upd_acc |
| * in the transmit queue, since S_SUBSCR_ATTACHED might |
| * trigger further action like SMS delivery */ |
| subscr_update(lchan->subscr, msg->trx->bts, |
| GSM_SUBSCRIBER_UPDATE_ATTACHED); |
| /* try to close channel ASAP */ |
| lchan_auto_release(lchan); |
| return rc; |
| } |
| |
| return 0; |
| } |
| |
| static int gsm0408_handle_lchan_signal(unsigned int subsys, unsigned int signal, |
| void *handler_data, void *signal_data) |
| { |
| struct gsm_trans *trans, *temp; |
| |
| if (subsys != SS_LCHAN || signal != S_LCHAN_UNEXPECTED_RELEASE) |
| return 0; |
| |
| /* |
| * Cancel any outstanding location updating request |
| * operation taking place on the lchan. |
| */ |
| struct gsm_lchan *lchan = (struct gsm_lchan *)signal_data; |
| if (!lchan) |
| return 0; |
| |
| release_loc_updating_req(lchan); |
| |
| /* Free all transactions that are associated with the released lchan */ |
| /* FIXME: this is not neccessarily the right thing to do, we should |
| * only set trans->lchan to NULL and wait for another lchan to be |
| * established to the same MM entity (phone/subscriber) */ |
| llist_for_each_entry_safe(trans, temp, &lchan->ts->trx->bts->network->trans_list, entry) { |
| if (trans->lchan == lchan) |
| trans_free(trans); |
| } |
| |
| return 0; |
| } |
| |
| static const char bcd_num_digits[] = { |
| '0', '1', '2', '3', '4', '5', '6', '7', |
| '8', '9', '*', '#', 'a', 'b', 'c', '\0' |
| }; |
| |
| /* decode a 'called/calling/connect party BCD number' as in 10.5.4.7 */ |
| int decode_bcd_number(char *output, int output_len, const u_int8_t *bcd_lv, |
| int h_len) |
| { |
| u_int8_t in_len = bcd_lv[0]; |
| int i; |
| |
| for (i = 1 + h_len; i <= in_len; i++) { |
| /* lower nibble */ |
| output_len--; |
| if (output_len <= 1) |
| break; |
| *output++ = bcd_num_digits[bcd_lv[i] & 0xf]; |
| |
| /* higher nibble */ |
| output_len--; |
| if (output_len <= 1) |
| break; |
| *output++ = bcd_num_digits[bcd_lv[i] >> 4]; |
| } |
| if (output_len >= 1) |
| *output++ = '\0'; |
| |
| return 0; |
| } |
| |
| /* convert a single ASCII character to call-control BCD */ |
| static int asc_to_bcd(const char asc) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(bcd_num_digits); i++) { |
| if (bcd_num_digits[i] == asc) |
| return i; |
| } |
| return -EINVAL; |
| } |
| |
| /* convert a ASCII phone number to 'called/calling/connect party BCD number' */ |
| int encode_bcd_number(u_int8_t *bcd_lv, u_int8_t max_len, |
| int h_len, const char *input) |
| { |
| int in_len = strlen(input); |
| int i; |
| u_int8_t *bcd_cur = bcd_lv + 1 + h_len; |
| |
| /* two digits per byte, plus type byte */ |
| bcd_lv[0] = in_len/2 + h_len; |
| if (in_len % 2) |
| bcd_lv[0]++; |
| |
| if (bcd_lv[0] > max_len) |
| return -EIO; |
| |
| for (i = 0; i < in_len; i++) { |
| int rc = asc_to_bcd(input[i]); |
| if (rc < 0) |
| return rc; |
| if (i % 2 == 0) |
| *bcd_cur = rc; |
| else |
| *bcd_cur++ |= (rc << 4); |
| } |
| /* append padding nibble in case of odd length */ |
| if (i % 2) |
| *bcd_cur++ |= 0xf0; |
| |
| /* return how many bytes we used */ |
| return (bcd_cur - bcd_lv); |
| } |
| |
| /* decode 'bearer capability' */ |
| static int decode_bearer_cap(struct gsm_mncc_bearer_cap *bcap, |
| const u_int8_t *lv) |
| { |
| u_int8_t in_len = lv[0]; |
| int i, s; |
| |
| if (in_len < 1) |
| return -EINVAL; |
| |
| bcap->speech_ver[0] = -1; /* end of list, of maximum 7 values */ |
| |
| /* octet 3 */ |
| bcap->transfer = lv[1] & 0x07; |
| bcap->mode = (lv[1] & 0x08) >> 3; |
| bcap->coding = (lv[1] & 0x10) >> 4; |
| bcap->radio = (lv[1] & 0x60) >> 5; |
| |
| if (bcap->transfer == GSM_MNCC_BCAP_SPEECH) { |
| i = 1; |
| s = 0; |
| while(!(lv[i] & 0x80)) { |
| i++; /* octet 3a etc */ |
| if (in_len < i) |
| return 0; |
| bcap->speech_ver[s++] = lv[i] & 0x0f; |
| bcap->speech_ver[s] = -1; /* end of list */ |
| if (i == 2) /* octet 3a */ |
| bcap->speech_ctm = (lv[i] & 0x20) >> 5; |
| if (s == 7) /* maximum speech versions + end of list */ |
| return 0; |
| } |
| } else { |
| i = 1; |
| while (!(lv[i] & 0x80)) { |
| i++; /* octet 3a etc */ |
| if (in_len < i) |
| return 0; |
| /* ignore them */ |
| } |
| /* FIXME: implement OCTET 4+ parsing */ |
| } |
| |
| return 0; |
| } |
| |
| /* encode 'bearer capability' */ |
| static int encode_bearer_cap(struct msgb *msg, int lv_only, |
| const struct gsm_mncc_bearer_cap *bcap) |
| { |
| u_int8_t lv[32 + 1]; |
| int i = 1, s; |
| |
| lv[1] = bcap->transfer; |
| lv[1] |= bcap->mode << 3; |
| lv[1] |= bcap->coding << 4; |
| lv[1] |= bcap->radio << 5; |
| |
| if (bcap->transfer == GSM_MNCC_BCAP_SPEECH) { |
| for (s = 0; bcap->speech_ver[s] >= 0; s++) { |
| i++; /* octet 3a etc */ |
| lv[i] = bcap->speech_ver[s]; |
| if (i == 2) /* octet 3a */ |
| lv[i] |= bcap->speech_ctm << 5; |
| } |
| lv[i] |= 0x80; /* last IE of octet 3 etc */ |
| } else { |
| /* FIXME: implement OCTET 4+ encoding */ |
| } |
| |
| lv[0] = i; |
| if (lv_only) |
| msgb_lv_put(msg, lv[0], lv+1); |
| else |
| msgb_tlv_put(msg, GSM48_IE_BEARER_CAP, lv[0], lv+1); |
| |
| return 0; |
| } |
| |
| /* decode 'call control cap' */ |
| static int decode_cccap(struct gsm_mncc_cccap *ccap, const u_int8_t *lv) |
| { |
| u_int8_t in_len = lv[0]; |
| |
| if (in_len < 1) |
| return -EINVAL; |
| |
| /* octet 3 */ |
| ccap->dtmf = lv[1] & 0x01; |
| ccap->pcp = (lv[1] & 0x02) >> 1; |
| |
| return 0; |
| } |
| |
| /* decode 'called party BCD number' */ |
| static int decode_called(struct gsm_mncc_number *called, |
| const u_int8_t *lv) |
| { |
| u_int8_t in_len = lv[0]; |
| |
| if (in_len < 1) |
| return -EINVAL; |
| |
| /* octet 3 */ |
| called->plan = lv[1] & 0x0f; |
| called->type = (lv[1] & 0x70) >> 4; |
| |
| /* octet 4..N */ |
| decode_bcd_number(called->number, sizeof(called->number), lv, 1); |
| |
| return 0; |
| } |
| |
| /* encode 'called party BCD number' */ |
| static int encode_called(struct msgb *msg, |
| const struct gsm_mncc_number *called) |
| { |
| u_int8_t lv[18]; |
| int ret; |
| |
| /* octet 3 */ |
| lv[1] = called->plan; |
| lv[1] |= called->type << 4; |
| |
| /* octet 4..N, octet 2 */ |
| ret = encode_bcd_number(lv, sizeof(lv), 1, called->number); |
| if (ret < 0) |
| return ret; |
| |
| msgb_tlv_put(msg, GSM48_IE_CALLED_BCD, lv[0], lv+1); |
| |
| return 0; |
| } |
| |
| /* encode callerid of various IEs */ |
| static int encode_callerid(struct msgb *msg, int ie, |
| const struct gsm_mncc_number *callerid) |
| { |
| u_int8_t lv[13]; |
| int h_len = 1; |
| int ret; |
| |
| /* octet 3 */ |
| lv[1] = callerid->plan; |
| lv[1] |= callerid->type << 4; |
| |
| if (callerid->present || callerid->screen) { |
| /* octet 3a */ |
| lv[2] = callerid->screen; |
| lv[2] |= callerid->present << 5; |
| lv[2] |= 0x80; |
| h_len++; |
| } else |
| lv[1] |= 0x80; |
| |
| /* octet 4..N, octet 2 */ |
| ret = encode_bcd_number(lv, sizeof(lv), h_len, callerid->number); |
| if (ret < 0) |
| return ret; |
| |
| msgb_tlv_put(msg, ie, lv[0], lv+1); |
| |
| return 0; |
| } |
| |
| /* decode 'cause' */ |
| static int decode_cause(struct gsm_mncc_cause *cause, |
| const u_int8_t *lv) |
| { |
| u_int8_t in_len = lv[0]; |
| int i; |
| |
| if (in_len < 2) |
| return -EINVAL; |
| |
| cause->diag_len = 0; |
| |
| /* octet 3 */ |
| cause->location = lv[1] & 0x0f; |
| cause->coding = (lv[1] & 0x60) >> 5; |
| |
| i = 1; |
| if (!(lv[i] & 0x80)) { |
| i++; /* octet 3a */ |
| if (in_len < i+1) |
| return 0; |
| cause->rec = 1; |
| cause->rec_val = lv[i] & 0x7f; |
| |
| } |
| i++; |
| |
| /* octet 4 */ |
| cause->value = lv[i] & 0x7f; |
| i++; |
| |
| if (in_len < i) /* no diag */ |
| return 0; |
| |
| if (in_len - (i-1) > 32) /* maximum 32 octets */ |
| return 0; |
| |
| /* octet 5-N */ |
| memcpy(cause->diag, lv + i, in_len - (i-1)); |
| cause->diag_len = in_len - (i-1); |
| |
| return 0; |
| } |
| |
| /* encode 'cause' */ |
| static int encode_cause(struct msgb *msg, int lv_only, |
| const struct gsm_mncc_cause *cause) |
| { |
| u_int8_t lv[32+4]; |
| int i; |
| |
| if (cause->diag_len > 32) |
| return -EINVAL; |
| |
| /* octet 3 */ |
| lv[1] = cause->location; |
| lv[1] |= cause->coding << 5; |
| |
| i = 1; |
| if (cause->rec) { |
| i++; /* octet 3a */ |
| lv[i] = cause->rec_val; |
| } |
| lv[i] |= 0x80; /* end of octet 3 */ |
| |
| /* octet 4 */ |
| i++; |
| lv[i] = 0x80 | cause->value; |
| |
| /* octet 5-N */ |
| if (cause->diag_len) { |
| memcpy(lv + i, cause->diag, cause->diag_len); |
| i += cause->diag_len; |
| } |
| |
| lv[0] = i; |
| if (lv_only) |
| msgb_lv_put(msg, lv[0], lv+1); |
| else |
| msgb_tlv_put(msg, GSM48_IE_CAUSE, lv[0], lv+1); |
| |
| return 0; |
| } |
| |
| /* encode 'calling number' */ |
| static int encode_calling(struct msgb *msg, |
| const struct gsm_mncc_number *calling) |
| { |
| return encode_callerid(msg, GSM48_IE_CALLING_BCD, calling); |
| } |
| |
| /* encode 'connected number' */ |
| static int encode_connected(struct msgb *msg, |
| const struct gsm_mncc_number *connected) |
| { |
| return encode_callerid(msg, GSM48_IE_CONN_BCD, connected); |
| } |
| |
| /* encode 'redirecting number' */ |
| static int encode_redirecting(struct msgb *msg, |
| const struct gsm_mncc_number *redirecting) |
| { |
| return encode_callerid(msg, GSM48_IE_REDIR_BCD, redirecting); |
| } |
| |
| /* decode 'facility' */ |
| static int decode_facility(struct gsm_mncc_facility *facility, |
| const u_int8_t *lv) |
| { |
| u_int8_t in_len = lv[0]; |
| |
| if (in_len < 1) |
| return -EINVAL; |
| |
| if (in_len > sizeof(facility->info)) |
| return -EINVAL; |
| |
| memcpy(facility->info, lv+1, in_len); |
| facility->len = in_len; |
| |
| return 0; |
| } |
| |
| /* encode 'facility' */ |
| static int encode_facility(struct msgb *msg, int lv_only, |
| const struct gsm_mncc_facility *facility) |
| { |
| u_int8_t lv[GSM_MAX_FACILITY + 1]; |
| |
| if (facility->len < 1 || facility->len > GSM_MAX_FACILITY) |
| return -EINVAL; |
| |
| memcpy(lv+1, facility->info, facility->len); |
| lv[0] = facility->len; |
| if (lv_only) |
| msgb_lv_put(msg, lv[0], lv+1); |
| else |
| msgb_tlv_put(msg, GSM48_IE_FACILITY, lv[0], lv+1); |
| |
| return 0; |
| } |
| |
| /* decode 'notify' */ |
| static int decode_notify(int *notify, const u_int8_t *v) |
| { |
| *notify = v[0] & 0x7f; |
| |
| return 0; |
| } |
| |
| /* encode 'notify' */ |
| static int encode_notify(struct msgb *msg, int notify) |
| { |
| msgb_v_put(msg, notify | 0x80); |
| |
| return 0; |
| } |
| |
| /* encode 'signal' */ |
| static int encode_signal(struct msgb *msg, int signal) |
| { |
| msgb_tv_put(msg, GSM48_IE_SIGNAL, signal); |
| |
| return 0; |
| } |
| |
| /* decode 'keypad' */ |
| static int decode_keypad(int *keypad, const u_int8_t *lv) |
| { |
| u_int8_t in_len = lv[0]; |
| |
| if (in_len < 1) |
| return -EINVAL; |
| |
| *keypad = lv[1] & 0x7f; |
| |
| return 0; |
| } |
| |
| /* encode 'keypad' */ |
| static int encode_keypad(struct msgb *msg, int keypad) |
| { |
| msgb_tv_put(msg, GSM48_IE_KPD_FACILITY, keypad); |
| |
| return 0; |
| } |
| |
| /* decode 'progress' */ |
| static int decode_progress(struct gsm_mncc_progress *progress, |
| const u_int8_t *lv) |
| { |
| u_int8_t in_len = lv[0]; |
| |
| if (in_len < 2) |
| return -EINVAL; |
| |
| progress->coding = (lv[1] & 0x60) >> 5; |
| progress->location = lv[1] & 0x0f; |
| progress->descr = lv[2] & 0x7f; |
| |
| return 0; |
| } |
| |
| /* encode 'progress' */ |
| static int encode_progress(struct msgb *msg, int lv_only, |
| const struct gsm_mncc_progress *p) |
| { |
| u_int8_t lv[3]; |
| |
| lv[0] = 2; |
| lv[1] = 0x80 | ((p->coding & 0x3) << 5) | (p->location & 0xf); |
| lv[2] = 0x80 | (p->descr & 0x7f); |
| if (lv_only) |
| msgb_lv_put(msg, lv[0], lv+1); |
| else |
| msgb_tlv_put(msg, GSM48_IE_PROGR_IND, lv[0], lv+1); |
| |
| return 0; |
| } |
| |
| /* decode 'user-user' */ |
| static int decode_useruser(struct gsm_mncc_useruser *uu, |
| const u_int8_t *lv) |
| { |
| u_int8_t in_len = lv[0]; |
| char *info = uu->info; |
| int info_len = sizeof(uu->info); |
| int i; |
| |
| if (in_len < 1) |
| return -EINVAL; |
| |
| uu->proto = lv[1]; |
| |
| for (i = 2; i <= in_len; i++) { |
| info_len--; |
| if (info_len <= 1) |
| break; |
| *info++ = lv[i]; |
| } |
| if (info_len >= 1) |
| *info++ = '\0'; |
| |
| return 0; |
| } |
| |
| /* encode 'useruser' */ |
| static int encode_useruser(struct msgb *msg, int lv_only, |
| const struct gsm_mncc_useruser *uu) |
| { |
| u_int8_t lv[GSM_MAX_USERUSER + 2]; |
| |
| if (strlen(uu->info) > GSM_MAX_USERUSER) |
| return -EINVAL; |
| |
| lv[0] = 1 + strlen(uu->info); |
| lv[1] = uu->proto; |
| memcpy(lv + 2, uu->info, strlen(uu->info)); |
| if (lv_only) |
| msgb_lv_put(msg, lv[0], lv+1); |
| else |
| msgb_tlv_put(msg, GSM48_IE_USER_USER, lv[0], lv+1); |
| |
| return 0; |
| } |
| |
| /* decode 'ss version' */ |
| static int decode_ssversion(struct gsm_mncc_ssversion *ssv, |
| const u_int8_t *lv) |
| { |
| u_int8_t in_len = lv[0]; |
| |
| if (in_len < 1 || in_len < sizeof(ssv->info)) |
| return -EINVAL; |
| |
| memcpy(ssv->info, lv + 1, in_len); |
| ssv->len = in_len; |
| |
| return 0; |
| } |
| |
| /* encode 'more data' */ |
| static int encode_more(struct msgb *msg) |
| { |
| u_int8_t *ie; |
| |
| ie = msgb_put(msg, 1); |
| ie[0] = GSM48_IE_MORE_DATA; |
| |
| return 0; |
| } |
| |
| /* Chapter 9.2.14 : Send LOCATION UPDATING REJECT */ |
| int gsm0408_loc_upd_rej(struct gsm_lchan *lchan, u_int8_t cause) |
| { |
| struct gsm_bts *bts = lchan->ts->trx->bts; |
| struct msgb *msg = gsm48_msgb_alloc(); |
| struct gsm48_hdr *gh; |
| |
| msg->lchan = lchan; |
| |
| gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| gh->proto_discr = GSM48_PDISC_MM; |
| gh->msg_type = GSM48_MT_MM_LOC_UPD_REJECT; |
| gh->data[0] = cause; |
| |
| DEBUGP(DMM, "-> LOCATION UPDATING REJECT on channel: %d\n", lchan->nr); |
| |
| counter_inc(bts->network->stats.loc_upd_resp.reject); |
| |
| return gsm48_sendmsg(msg, NULL); |
| } |
| |
| /* Chapter 9.2.13 : Send LOCATION UPDATE ACCEPT */ |
| int gsm0408_loc_upd_acc(struct gsm_lchan *lchan, u_int32_t tmsi) |
| { |
| struct gsm_bts *bts = lchan->ts->trx->bts; |
| struct msgb *msg = gsm48_msgb_alloc(); |
| struct gsm48_hdr *gh; |
| struct gsm48_loc_area_id *lai; |
| u_int8_t *mid; |
| |
| msg->lchan = lchan; |
| |
| 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)); |
| gsm0408_generate_lai(lai, bts->network->country_code, |
| bts->network->network_code, bts->location_area_code); |
| |
| mid = msgb_put(msg, GSM48_MID_TMSI_LEN); |
| gsm48_generate_mid_from_tmsi(mid, tmsi); |
| |
| DEBUGP(DMM, "-> LOCATION UPDATE ACCEPT\n"); |
| |
| counter_inc(bts->network->stats.loc_upd_resp.accept); |
| |
| return gsm48_sendmsg(msg, NULL); |
| } |
| |
| /* Transmit Chapter 9.2.10 Identity Request */ |
| static int mm_tx_identity_req(struct gsm_lchan *lchan, u_int8_t id_type) |
| { |
| struct msgb *msg = gsm48_msgb_alloc(); |
| struct gsm48_hdr *gh; |
| |
| msg->lchan = lchan; |
| |
| 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_sendmsg(msg, NULL); |
| } |
| |
| |
| /* Parse Chapter 9.2.11 Identity Response */ |
| static int mm_rx_id_resp(struct msgb *msg) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| struct gsm_lchan *lchan = msg->lchan; |
| struct gsm_bts *bts = lchan->ts->trx->bts; |
| struct gsm_network *net = bts->network; |
| u_int8_t mi_type = gh->data[1] & GSM_MI_TYPE_MASK; |
| char mi_string[GSM48_MI_SIZE]; |
| |
| gsm48_mi_to_string(mi_string, sizeof(mi_string), &gh->data[1], gh->data[0]); |
| DEBUGP(DMM, "IDENTITY RESPONSE: mi_type=0x%02x MI(%s)\n", |
| mi_type, mi_string); |
| |
| dispatch_signal(SS_SUBSCR, S_SUBSCR_IDENTITY, gh->data); |
| |
| switch (mi_type) { |
| case GSM_MI_TYPE_IMSI: |
| /* look up subscriber based on IMSI, create if not found */ |
| if (!lchan->subscr) { |
| lchan->subscr = subscr_get_by_imsi(net, mi_string); |
| if (!lchan->subscr) |
| lchan->subscr = db_create_subscriber(net, mi_string); |
| } |
| if (lchan->loc_operation) |
| lchan->loc_operation->waiting_for_imsi = 0; |
| break; |
| case GSM_MI_TYPE_IMEI: |
| case GSM_MI_TYPE_IMEISV: |
| /* update subscribe <-> IMEI mapping */ |
| if (lchan->subscr) { |
| db_subscriber_assoc_imei(lchan->subscr, mi_string); |
| db_sync_equipment(&lchan->subscr->equipment); |
| } |
| if (lchan->loc_operation) |
| lchan->loc_operation->waiting_for_imei = 0; |
| break; |
| } |
| |
| /* Check if we can let the mobile station enter */ |
| return gsm0408_authorize(lchan, msg); |
| } |
| |
| |
| static void loc_upd_rej_cb(void *data) |
| { |
| struct gsm_lchan *lchan = data; |
| struct gsm_bts *bts = lchan->ts->trx->bts; |
| |
| release_loc_updating_req(lchan); |
| gsm0408_loc_upd_rej(lchan, bts->network->reject_cause); |
| lchan_auto_release(lchan); |
| } |
| |
| static void schedule_reject(struct gsm_lchan *lchan) |
| { |
| lchan->loc_operation->updating_timer.cb = loc_upd_rej_cb; |
| lchan->loc_operation->updating_timer.data = lchan; |
| bsc_schedule_timer(&lchan->loc_operation->updating_timer, 5, 0); |
| } |
| |
| static const char *lupd_name(u_int8_t type) |
| { |
| switch (type) { |
| case GSM48_LUPD_NORMAL: |
| return "NORMAL"; |
| case GSM48_LUPD_PERIODIC: |
| return "PEROIDOC"; |
| case GSM48_LUPD_IMSI_ATT: |
| return "IMSI ATTACH"; |
| default: |
| return "UNKNOWN"; |
| } |
| } |
| |
| /* Chapter 9.2.15: Receive Location Updating Request */ |
| static int mm_rx_loc_upd_req(struct msgb *msg) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| struct gsm48_loc_upd_req *lu; |
| struct gsm_subscriber *subscr = NULL; |
| struct gsm_lchan *lchan = msg->lchan; |
| struct gsm_bts *bts = lchan->ts->trx->bts; |
| u_int8_t mi_type; |
| char mi_string[GSM48_MI_SIZE]; |
| 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); |
| |
| DEBUGPC(DMM, "mi_type=0x%02x MI(%s) type=%s ", mi_type, mi_string, |
| lupd_name(lu->type)); |
| |
| dispatch_signal(SS_SUBSCR, S_SUBSCR_IDENTITY, &lu->mi_len); |
| |
| switch (lu->type) { |
| case GSM48_LUPD_NORMAL: |
| counter_inc(bts->network->stats.loc_upd_type.normal); |
| break; |
| case GSM48_LUPD_IMSI_ATT: |
| counter_inc(bts->network->stats.loc_upd_type.attach); |
| break; |
| case GSM48_LUPD_PERIODIC: |
| counter_inc(bts->network->stats.loc_upd_type.periodic); |
| break; |
| } |
| |
| /* |
| * Pseudo Spoof detection: Just drop a second/concurrent |
| * location updating request. |
| */ |
| if (lchan->loc_operation) { |
| DEBUGPC(DMM, "ignoring request due an existing one: %p.\n", |
| lchan->loc_operation); |
| gsm0408_loc_upd_rej(lchan, GSM48_REJECT_PROTOCOL_ERROR); |
| return 0; |
| } |
| |
| allocate_loc_updating_req(lchan); |
| |
| switch (mi_type) { |
| case GSM_MI_TYPE_IMSI: |
| DEBUGPC(DMM, "\n"); |
| /* we always want the IMEI, too */ |
| rc = mm_tx_identity_req(lchan, GSM_MI_TYPE_IMEI); |
| lchan->loc_operation->waiting_for_imei = 1; |
| |
| /* look up subscriber based on IMSI, create if not found */ |
| subscr = subscr_get_by_imsi(bts->network, mi_string); |
| if (!subscr) { |
| subscr = db_create_subscriber(bts->network, mi_string); |
| } |
| break; |
| case GSM_MI_TYPE_TMSI: |
| DEBUGPC(DMM, "\n"); |
| /* we always want the IMEI, too */ |
| rc = mm_tx_identity_req(lchan, GSM_MI_TYPE_IMEI); |
| lchan->loc_operation->waiting_for_imei = 1; |
| |
| /* look up the subscriber based on TMSI, request IMSI if it fails */ |
| subscr = subscr_get_by_tmsi(bts->network, |
| tmsi_from_string(mi_string)); |
| if (!subscr) { |
| /* send IDENTITY REQUEST message to get IMSI */ |
| rc = mm_tx_identity_req(lchan, GSM_MI_TYPE_IMSI); |
| lchan->loc_operation->waiting_for_imsi = 1; |
| } |
| break; |
| case GSM_MI_TYPE_IMEI: |
| case GSM_MI_TYPE_IMEISV: |
| /* no sim card... FIXME: what to do ? */ |
| DEBUGPC(DMM, "unimplemented mobile identity type\n"); |
| break; |
| default: |
| DEBUGPC(DMM, "unknown mobile identity type\n"); |
| break; |
| } |
| |
| /* schedule the reject timer */ |
| schedule_reject(lchan); |
| |
| if (!subscr) { |
| DEBUGPC(DRR, "<- Can't find any subscriber for this ID\n"); |
| /* FIXME: request id? close channel? */ |
| return -EINVAL; |
| } |
| |
| lchan->subscr = subscr; |
| lchan->subscr->equipment.classmark1 = lu->classmark1; |
| |
| /* check if we can let the subscriber into our network immediately |
| * or if we need to wait for identity responses. */ |
| return gsm0408_authorize(lchan, msg); |
| } |
| |
| #if 0 |
| static u_int8_t to_bcd8(u_int8_t val) |
| { |
| return ((val / 10) << 4) | (val % 10); |
| } |
| #endif |
| |
| /* Section 9.2.15a */ |
| int gsm48_tx_mm_info(struct gsm_lchan *lchan) |
| { |
| struct msgb *msg = gsm48_msgb_alloc(); |
| struct gsm48_hdr *gh; |
| struct gsm_network *net = lchan->ts->trx->bts->network; |
| u_int8_t *ptr8; |
| int name_len, name_pad; |
| #if 0 |
| time_t cur_t; |
| struct tm* cur_time; |
| int tz15min; |
| #endif |
| |
| msg->lchan = lchan; |
| |
| 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 = (u_int16_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(ptr8, net->name_long); |
| |
| } |
| |
| if (net->name_short) { |
| #if 0 |
| name_len = strlen(net->name_short); |
| /* 10.5.3.5a */ |
| ptr8 = (u_int8_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 = (u_int16_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 = (u_int8_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(ptr8, net->name_short); |
| |
| } |
| |
| #if 0 |
| /* Section 10.5.3.9 */ |
| cur_t = time(NULL); |
| cur_time = gmtime(&cur_t); |
| ptr8 = msgb_put(msg, 8); |
| ptr8[0] = GSM48_IE_NET_TIME_TZ; |
| ptr8[1] = to_bcd8(cur_time->tm_year % 100); |
| ptr8[2] = to_bcd8(cur_time->tm_mon); |
| ptr8[3] = to_bcd8(cur_time->tm_mday); |
| ptr8[4] = to_bcd8(cur_time->tm_hour); |
| ptr8[5] = to_bcd8(cur_time->tm_min); |
| ptr8[6] = to_bcd8(cur_time->tm_sec); |
| /* 02.42: coded as BCD encoded signed value in units of 15 minutes */ |
| tz15min = (cur_time->tm_gmtoff)/(60*15); |
| ptr8[7] = to_bcd8(tz15min); |
| if (tz15min < 0) |
| ptr8[7] |= 0x80; |
| #endif |
| |
| DEBUGP(DMM, "-> MM INFO\n"); |
| |
| return gsm48_sendmsg(msg, NULL); |
| } |
| |
| /* Section 9.2.2 */ |
| int gsm48_tx_mm_auth_req(struct gsm_lchan *lchan, u_int8_t *rand) |
| { |
| struct msgb *msg = gsm48_msgb_alloc(); |
| 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\n"); |
| |
| msg->lchan = lchan; |
| gh->proto_discr = GSM48_PDISC_MM; |
| gh->msg_type = GSM48_MT_MM_AUTH_REQ; |
| |
| /* Key Sequence: FIXME fixed to 0 */ |
| ar->key_seq = 0; |
| |
| /* 16 bytes RAND parameters */ |
| if (rand) |
| memcpy(ar->rand, rand, 16); |
| |
| return gsm48_sendmsg(msg, NULL); |
| } |
| |
| /* Section 9.2.1 */ |
| int gsm48_tx_mm_auth_rej(struct gsm_lchan *lchan) |
| { |
| DEBUGP(DMM, "-> AUTH REJECT\n"); |
| return gsm48_tx_simple(lchan, GSM48_PDISC_MM, GSM48_MT_MM_AUTH_REJ); |
| } |
| |
| static int gsm48_tx_mm_serv_ack(struct gsm_lchan *lchan) |
| { |
| DEBUGP(DMM, "-> CM SERVICE ACK\n"); |
| return gsm48_tx_simple(lchan, GSM48_PDISC_MM, GSM48_MT_MM_CM_SERV_ACC); |
| } |
| |
| /* 9.2.6 CM service reject */ |
| static int gsm48_tx_mm_serv_rej(struct gsm_lchan *lchan, |
| enum gsm48_reject_value value) |
| { |
| struct msgb *msg = gsm48_msgb_alloc(); |
| struct gsm48_hdr *gh; |
| |
| gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| |
| msg->lchan = lchan; |
| use_lchan(lchan); |
| |
| gh->proto_discr = GSM48_PDISC_MM; |
| gh->msg_type = GSM48_MT_MM_CM_SERV_REJ; |
| gh->data[0] = value; |
| DEBUGP(DMM, "-> CM SERVICE Reject cause: %d\n", value); |
| |
| return gsm48_sendmsg(msg, NULL); |
| } |
| |
| /* |
| * 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 gsm_lchan and accept |
| */ |
| static int gsm48_rx_mm_serv_req(struct msgb *msg) |
| { |
| u_int8_t mi_type; |
| char mi_string[GSM48_MI_SIZE]; |
| |
| struct gsm_bts *bts = msg->lchan->ts->trx->bts; |
| struct gsm_subscriber *subscr; |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| struct gsm48_service_request *req = |
| (struct gsm48_service_request *)gh->data; |
| /* unfortunately in Phase1 the classmar2 length is variable */ |
| u_int8_t classmark2_len = gh->data[1]; |
| u_int8_t *classmark2 = gh->data+2; |
| u_int8_t mi_len = *(classmark2 + classmark2_len); |
| u_int8_t *mi = (classmark2 + classmark2_len + 1); |
| |
| DEBUGP(DMM, "<- CM SERVICE REQUEST "); |
| if (msg->data_len < sizeof(struct gsm48_service_request*)) { |
| DEBUGPC(DMM, "wrong sized message\n"); |
| return gsm48_tx_mm_serv_rej(msg->lchan, |
| GSM48_REJECT_INCORRECT_MESSAGE); |
| } |
| |
| if (msg->data_len < req->mi_len + 6) { |
| DEBUGPC(DMM, "does not fit in packet\n"); |
| return gsm48_tx_mm_serv_rej(msg->lchan, |
| GSM48_REJECT_INCORRECT_MESSAGE); |
| } |
| |
| mi_type = mi[0] & GSM_MI_TYPE_MASK; |
| if (mi_type != GSM_MI_TYPE_TMSI) { |
| DEBUGPC(DMM, "mi_type is not TMSI: %d\n", mi_type); |
| return gsm48_tx_mm_serv_rej(msg->lchan, |
| GSM48_REJECT_INCORRECT_MESSAGE); |
| } |
| |
| gsm48_mi_to_string(mi_string, sizeof(mi_string), mi, mi_len); |
| DEBUGPC(DMM, "serv_type=0x%02x mi_type=0x%02x M(%s)\n", |
| req->cm_service_type, mi_type, mi_string); |
| |
| dispatch_signal(SS_SUBSCR, S_SUBSCR_IDENTITY, (classmark2 + classmark2_len)); |
| |
| if (is_siemens_bts(bts)) |
| send_siemens_mrpci(msg->lchan, classmark2-1); |
| |
| subscr = subscr_get_by_tmsi(bts->network, |
| tmsi_from_string(mi_string)); |
| |
| /* FIXME: if we don't know the TMSI, inquire abit IMSI and allocate new TMSI */ |
| if (!subscr) |
| return gsm48_tx_mm_serv_rej(msg->lchan, |
| GSM48_REJECT_IMSI_UNKNOWN_IN_HLR); |
| |
| if (!msg->lchan->subscr) |
| msg->lchan->subscr = subscr; |
| else if (msg->lchan->subscr == subscr) |
| subscr_put(subscr); /* lchan already has a ref, don't need another one */ |
| else { |
| DEBUGP(DMM, "<- CM Channel already owned by someone else?\n"); |
| subscr_put(subscr); |
| } |
| |
| subscr->equipment.classmark2_len = classmark2_len; |
| memcpy(subscr->equipment.classmark2, classmark2, classmark2_len); |
| db_sync_equipment(&subscr->equipment); |
| |
| return gsm48_tx_mm_serv_ack(msg->lchan); |
| } |
| |
| static int gsm48_rx_mm_imsi_detach_ind(struct msgb *msg) |
| { |
| struct gsm_bts *bts = msg->lchan->ts->trx->bts; |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| struct gsm48_imsi_detach_ind *idi = |
| (struct gsm48_imsi_detach_ind *) gh->data; |
| u_int8_t mi_type = idi->mi[0] & GSM_MI_TYPE_MASK; |
| char mi_string[GSM48_MI_SIZE]; |
| struct gsm_subscriber *subscr = NULL; |
| |
| gsm48_mi_to_string(mi_string, sizeof(mi_string), idi->mi, idi->mi_len); |
| DEBUGP(DMM, "IMSI DETACH INDICATION: mi_type=0x%02x MI(%s): ", |
| mi_type, mi_string); |
| |
| counter_inc(bts->network->stats.loc_upd_type.detach); |
| |
| switch (mi_type) { |
| case GSM_MI_TYPE_TMSI: |
| subscr = subscr_get_by_tmsi(bts->network, |
| tmsi_from_string(mi_string)); |
| break; |
| case GSM_MI_TYPE_IMSI: |
| subscr = subscr_get_by_imsi(bts->network, mi_string); |
| break; |
| case GSM_MI_TYPE_IMEI: |
| case GSM_MI_TYPE_IMEISV: |
| /* no sim card... FIXME: what to do ? */ |
| DEBUGPC(DMM, "unimplemented mobile identity type\n"); |
| break; |
| default: |
| DEBUGPC(DMM, "unknown mobile identity type\n"); |
| break; |
| } |
| |
| if (subscr) { |
| subscr_update(subscr, msg->trx->bts, |
| GSM_SUBSCRIBER_UPDATE_DETACHED); |
| DEBUGP(DMM, "Subscriber: %s\n", |
| subscr->name ? subscr->name : subscr->imsi); |
| |
| subscr->equipment.classmark1 = idi->classmark1; |
| db_sync_equipment(&subscr->equipment); |
| |
| subscr_put(subscr); |
| } else |
| DEBUGP(DMM, "Unknown Subscriber ?!?\n"); |
| |
| /* FIXME: iterate over all transactions and release them, |
| * imagine an IMSI DETACH happening during an active call! */ |
| |
| /* subscriber is detached: should we release lchan? */ |
| lchan_auto_release(msg->lchan); |
| |
| 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; |
| } |
| |
| /* Receive a GSM 04.08 Mobility Management (MM) message */ |
| static int gsm0408_rcv_mm(struct msgb *msg) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| int rc = 0; |
| |
| switch (gh->msg_type & 0xbf) { |
| case GSM48_MT_MM_LOC_UPD_REQUEST: |
| DEBUGP(DMM, "LOCATION UPDATING REQUEST: "); |
| rc = mm_rx_loc_upd_req(msg); |
| break; |
| case GSM48_MT_MM_ID_RESP: |
| rc = mm_rx_id_resp(msg); |
| break; |
| case GSM48_MT_MM_CM_SERV_REQ: |
| rc = gsm48_rx_mm_serv_req(msg); |
| break; |
| case GSM48_MT_MM_STATUS: |
| rc = gsm48_rx_mm_status(msg); |
| break; |
| case GSM48_MT_MM_TMSI_REALL_COMPL: |
| DEBUGP(DMM, "TMSI Reallocation Completed. Subscriber: %s\n", |
| msg->lchan->subscr ? |
| msg->lchan->subscr->imsi : |
| "unknown subscriber"); |
| break; |
| case GSM48_MT_MM_IMSI_DETACH_IND: |
| rc = gsm48_rx_mm_imsi_detach_ind(msg); |
| break; |
| case GSM48_MT_MM_CM_REEST_REQ: |
| DEBUGP(DMM, "CM REESTABLISH REQUEST: Not implemented\n"); |
| break; |
| case GSM48_MT_MM_AUTH_RESP: |
| DEBUGP(DMM, "AUTHENTICATION RESPONSE: Not implemented\n"); |
| break; |
| default: |
| fprintf(stderr, "Unknown GSM 04.08 MM msg type 0x%02x\n", |
| gh->msg_type); |
| break; |
| } |
| |
| return rc; |
| } |
| |
| /* Receive a PAGING RESPONSE message from the MS */ |
| static int gsm48_rx_rr_pag_resp(struct msgb *msg) |
| { |
| struct gsm_bts *bts = msg->lchan->ts->trx->bts; |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| u_int8_t *classmark2_lv = gh->data + 1; |
| u_int8_t mi_type; |
| char mi_string[GSM48_MI_SIZE]; |
| struct gsm_subscriber *subscr = NULL; |
| int rc = 0; |
| |
| gsm48_paging_extract_mi(msg, mi_string, &mi_type); |
| DEBUGP(DRR, "PAGING RESPONSE: mi_type=0x%02x MI(%s)\n", |
| mi_type, mi_string); |
| |
| switch (mi_type) { |
| case GSM_MI_TYPE_TMSI: |
| subscr = subscr_get_by_tmsi(bts->network, |
| tmsi_from_string(mi_string)); |
| break; |
| case GSM_MI_TYPE_IMSI: |
| subscr = subscr_get_by_imsi(bts->network, mi_string); |
| break; |
| } |
| |
| if (!subscr) { |
| DEBUGP(DRR, "<- Can't find any subscriber for this ID\n"); |
| /* FIXME: request id? close channel? */ |
| return -EINVAL; |
| } |
| DEBUGP(DRR, "<- Channel was requested by %s\n", |
| subscr->name && strlen(subscr->name) ? subscr->name : subscr->imsi); |
| |
| subscr->equipment.classmark2_len = *classmark2_lv; |
| memcpy(subscr->equipment.classmark2, classmark2_lv+1, *classmark2_lv); |
| db_sync_equipment(&subscr->equipment); |
| |
| rc = gsm48_handle_paging_resp(msg, subscr); |
| return rc; |
| } |
| |
| static int gsm48_rx_rr_classmark(struct msgb *msg) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| struct gsm_subscriber *subscr = msg->lchan->subscr; |
| unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh); |
| u_int8_t cm2_len, cm3_len = 0; |
| u_int8_t *cm2, *cm3 = NULL; |
| |
| DEBUGP(DRR, "CLASSMARK CHANGE "); |
| |
| /* classmark 2 */ |
| cm2_len = gh->data[0]; |
| cm2 = &gh->data[1]; |
| DEBUGPC(DRR, "CM2(len=%u) ", cm2_len); |
| |
| if (payload_len > cm2_len + 1) { |
| /* we must have a classmark3 */ |
| if (gh->data[cm2_len+1] != 0x20) { |
| DEBUGPC(DRR, "ERR CM3 TAG\n"); |
| return -EINVAL; |
| } |
| if (cm2_len > 3) { |
| DEBUGPC(DRR, "CM2 too long!\n"); |
| return -EINVAL; |
| } |
| |
| cm3_len = gh->data[cm2_len+2]; |
| cm3 = &gh->data[cm2_len+3]; |
| if (cm3_len > 14) { |
| DEBUGPC(DRR, "CM3 len %u too long!\n", cm3_len); |
| return -EINVAL; |
| } |
| DEBUGPC(DRR, "CM3(len=%u)\n", cm3_len); |
| } |
| if (subscr) { |
| subscr->equipment.classmark2_len = cm2_len; |
| memcpy(subscr->equipment.classmark2, cm2, cm2_len); |
| if (cm3) { |
| subscr->equipment.classmark3_len = cm3_len; |
| memcpy(subscr->equipment.classmark3, cm3, cm3_len); |
| } |
| db_sync_equipment(&subscr->equipment); |
| } |
| |
| return 0; |
| } |
| |
| static int gsm48_rx_rr_status(struct msgb *msg) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| |
| DEBUGP(DRR, "STATUS rr_cause = %s\n", |
| rr_cause_name(gh->data[0])); |
| |
| return 0; |
| } |
| |
| static int gsm48_rx_rr_meas_rep(struct msgb *msg) |
| { |
| struct gsm_meas_rep *meas_rep = lchan_next_meas_rep(msg->lchan); |
| |
| /* This shouldn't actually end up here, as RSL treats |
| * L3 Info of 08.58 MEASUREMENT REPORT different by calling |
| * directly into gsm48_parse_meas_rep */ |
| DEBUGP(DMEAS, "DIRECT GSM48 MEASUREMENT REPORT ?!? "); |
| gsm48_parse_meas_rep(meas_rep, msg); |
| |
| return 0; |
| } |
| |
| static int gsm48_rx_rr_app_info(struct msgb *msg) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| u_int8_t apdu_id_flags; |
| u_int8_t apdu_len; |
| u_int8_t *apdu_data; |
| |
| apdu_id_flags = gh->data[0]; |
| apdu_len = gh->data[1]; |
| apdu_data = gh->data+2; |
| |
| DEBUGP(DNM, "RX APPLICATION INFO id/flags=0x%02x apdu_len=%u apdu=%s", |
| apdu_id_flags, apdu_len, hexdump(apdu_data, apdu_len)); |
| |
| return db_apdu_blob_store(msg->lchan->subscr, apdu_id_flags, apdu_len, apdu_data); |
| } |
| |
| /* Chapter 9.1.16 Handover complete */ |
| static int gsm48_rx_rr_ho_compl(struct msgb *msg) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| |
| DEBUGP(DRR, "HANDOVER COMPLETE cause = %s\n", |
| rr_cause_name(gh->data[0])); |
| |
| dispatch_signal(SS_LCHAN, S_LCHAN_HANDOVER_COMPL, msg->lchan); |
| /* FIXME: release old channel */ |
| |
| return 0; |
| } |
| |
| /* Chapter 9.1.17 Handover Failure */ |
| static int gsm48_rx_rr_ho_fail(struct msgb *msg) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| |
| DEBUGP(DRR, "HANDOVER FAILED cause = %s\n", |
| rr_cause_name(gh->data[0])); |
| |
| dispatch_signal(SS_LCHAN, S_LCHAN_HANDOVER_FAIL, msg->lchan); |
| /* FIXME: release allocated new channel */ |
| |
| return 0; |
| } |
| |
| /* Receive a GSM 04.08 Radio Resource (RR) message */ |
| static int gsm0408_rcv_rr(struct msgb *msg) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| int rc = 0; |
| |
| switch (gh->msg_type) { |
| case GSM48_MT_RR_CLSM_CHG: |
| rc = gsm48_rx_rr_classmark(msg); |
| break; |
| case GSM48_MT_RR_GPRS_SUSP_REQ: |
| DEBUGP(DRR, "GRPS SUSPEND REQUEST\n"); |
| break; |
| case GSM48_MT_RR_PAG_RESP: |
| rc = gsm48_rx_rr_pag_resp(msg); |
| break; |
| case GSM48_MT_RR_CHAN_MODE_MODIF_ACK: |
| rc = gsm48_rx_rr_modif_ack(msg); |
| break; |
| case GSM48_MT_RR_STATUS: |
| rc = gsm48_rx_rr_status(msg); |
| break; |
| case GSM48_MT_RR_MEAS_REP: |
| rc = gsm48_rx_rr_meas_rep(msg); |
| break; |
| case GSM48_MT_RR_APP_INFO: |
| rc = gsm48_rx_rr_app_info(msg); |
| break; |
| case GSM48_MT_RR_CIPH_M_COMPL: |
| DEBUGP(DRR, "CIPHERING MODE COMPLETE\n"); |
| /* FIXME: check for MI (if any) */ |
| break; |
| case GSM48_MT_RR_HANDO_COMPL: |
| rc = gsm48_rx_rr_ho_compl(msg); |
| break; |
| case GSM48_MT_RR_HANDO_FAIL: |
| rc = gsm48_rx_rr_ho_fail(msg); |
| break; |
| default: |
| fprintf(stderr, "Unimplemented GSM 04.08 RR msg type 0x%02x\n", |
| gh->msg_type); |
| break; |
| } |
| |
| return rc; |
| } |
| |
| int gsm48_send_rr_app_info(struct gsm_lchan *lchan, u_int8_t apdu_id, |
| u_int8_t apdu_len, const u_int8_t *apdu) |
| { |
| struct msgb *msg = gsm48_msgb_alloc(); |
| struct gsm48_hdr *gh; |
| |
| msg->lchan = lchan; |
| |
| 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_sendmsg(msg, NULL); |
| } |
| |
| /* 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", |
| cc_state_names[trans->cc.state], cc_state_names[state]); |
| |
| trans->cc.state = state; |
| } |
| |
| static int gsm48_cc_tx_status(struct gsm_trans *trans, void *arg) |
| { |
| struct msgb *msg = gsm48_msgb_alloc(); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| u_int8_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_sendmsg(msg, trans); |
| } |
| |
| static int gsm48_tx_simple(struct gsm_lchan *lchan, |
| u_int8_t pdisc, u_int8_t msg_type) |
| { |
| struct msgb *msg = gsm48_msgb_alloc(); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| |
| msg->lchan = lchan; |
| |
| gh->proto_discr = pdisc; |
| gh->msg_type = msg_type; |
| |
| return gsm48_sendmsg(msg, NULL); |
| } |
| |
| static void gsm48_stop_cc_timer(struct gsm_trans *trans) |
| { |
| if (bsc_timer_pending(&trans->cc.timer)) { |
| DEBUGP(DCC, "stopping pending timer T%x\n", trans->cc.Tcurrent); |
| bsc_del_timer(&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; |
| |
| if (trans) |
| if (trans->lchan) |
| DEBUGP(DCC, "(bts %d trx %d ts %d ti %x sub %s) " |
| "Sending '%s' to MNCC.\n", |
| trans->lchan->ts->trx->bts->nr, |
| trans->lchan->ts->trx->nr, |
| trans->lchan->ts->nr, trans->transaction_id, |
| (trans->subscr)?(trans->subscr->extension):"-", |
| get_mncc_name(msg_type)); |
| else |
| DEBUGP(DCC, "(bts - trx - ts - ti -- sub %s) " |
| "Sending '%s' to MNCC.\n", |
| (trans->subscr)?(trans->subscr->extension):"-", |
| get_mncc_name(msg_type)); |
| else |
| DEBUGP(DCC, "(bts - trx - ts - ti -- sub -) " |
| "Sending '%s' to MNCC.\n", get_mncc_name(msg_type)); |
| |
| mncc->msg_type = msg_type; |
| |
| msg = msgb_alloc(sizeof(struct gsm_mncc), "MNCC"); |
| if (!msg) |
| return -ENOMEM; |
| memcpy(msg->data, mncc, sizeof(struct gsm_mncc)); |
| msgb_enqueue(&net->upqueue, msg); |
| |
| return 0; |
| } |
| |
| int mncc_release_ind(struct gsm_network *net, struct gsm_trans *trans, |
| u_int32_t callref, int location, int value) |
| { |
| struct gsm_mncc rel; |
| |
| memset(&rel, 0, sizeof(rel)); |
| rel.callref = callref; |
| mncc_set_cause(&rel, location, value); |
| 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); |
| |
| /* send release to L4, if callref still exists */ |
| if (trans->callref) { |
| /* Ressource unavailable */ |
| mncc_release_ind(trans->subscr->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); |
| if (trans->lchan) |
| trau_mux_unmap(&trans->lchan->ts->e1_link, trans->callref); |
| } |
| |
| 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 *_lchan, void *param) |
| { |
| struct gsm_lchan *lchan = _lchan; |
| struct gsm_subscriber *subscr = param; |
| struct gsm_trans *transt, *tmp; |
| struct gsm_network *net; |
| |
| if (hooknum != GSM_HOOK_RR_PAGING) |
| return -EINVAL; |
| |
| if (!subscr) |
| return -EINVAL; |
| net = subscr->net; |
| if (!net) { |
| DEBUGP(DCC, "Error Network not set!\n"); |
| return -EINVAL; |
| } |
| |
| /* check all tranactions (without lchan) for subscriber */ |
| llist_for_each_entry_safe(transt, tmp, &net->trans_list, entry) { |
| if (transt->subscr != subscr || transt->lchan) |
| continue; |
| switch (event) { |
| case GSM_PAGING_SUCCEEDED: |
| if (!lchan) // paranoid |
| break; |
| DEBUGP(DCC, "Paging subscr %s succeeded!\n", |
| subscr->extension); |
| /* Assign lchan */ |
| if (!transt->lchan) { |
| transt->lchan = lchan; |
| use_lchan(lchan); |
| } |
| /* send SETUP request to called party */ |
| gsm48_cc_tx_setup(transt, &transt->cc.msg); |
| break; |
| case GSM_PAGING_EXPIRED: |
| DEBUGP(DCC, "Paging subscr %s expired!\n", |
| subscr->extension); |
| /* Temporarily out of order */ |
| mncc_release_ind(transt->subscr->net, transt, |
| transt->callref, |
| GSM48_CAUSE_LOC_PRN_S_LU, |
| GSM48_CC_CAUSE_DEST_OOO); |
| transt->callref = 0; |
| trans_free(transt); |
| break; |
| } |
| } |
| return 0; |
| } |
| |
| static int tch_recv_mncc(struct gsm_network *net, u_int32_t callref, int enable); |
| |
| /* some other part of the code sends us a signal */ |
| static int handle_abisip_signal(unsigned int subsys, unsigned int signal, |
| void *handler_data, void *signal_data) |
| { |
| struct gsm_lchan *lchan = signal_data; |
| int rc; |
| struct gsm_network *net; |
| struct gsm_trans *trans; |
| |
| if (subsys != SS_ABISIP) |
| return 0; |
| |
| /* in case we use direct BTS-to-BTS RTP */ |
| if (ipacc_rtp_direct) |
| return 0; |
| |
| switch (signal) { |
| case S_ABISIP_CRCX_ACK: |
| /* check if any transactions on this lchan still have |
| * a tch_recv_mncc request pending */ |
| net = lchan->ts->trx->bts->network; |
| llist_for_each_entry(trans, &net->trans_list, entry) { |
| if (trans->lchan == lchan && trans->tch_recv) { |
| DEBUGP(DCC, "pending tch_recv_mncc request\n"); |
| tch_recv_mncc(net, trans->callref, 1); |
| } |
| } |
| break; |
| } |
| |
| return 0; |
| } |
| |
| /* map two ipaccess RTP streams onto each other */ |
| static int tch_map(struct gsm_lchan *lchan, struct gsm_lchan *remote_lchan) |
| { |
| struct gsm_bts *bts = lchan->ts->trx->bts; |
| struct gsm_bts *remote_bts = remote_lchan->ts->trx->bts; |
| int rc; |
| |
| DEBUGP(DCC, "Setting up TCH map between (bts=%u,trx=%u,ts=%u) and (bts=%u,trx=%u,ts=%u)\n", |
| bts->nr, lchan->ts->trx->nr, lchan->ts->nr, |
| remote_bts->nr, remote_lchan->ts->trx->nr, remote_lchan->ts->nr); |
| |
| if (bts->type != remote_bts->type) { |
| DEBUGP(DCC, "Cannot switch calls between different BTS types yet\n"); |
| return -EINVAL; |
| } |
| |
| // todo: map between different bts types |
| switch (bts->type) { |
| case GSM_BTS_TYPE_NANOBTS: |
| if (!ipacc_rtp_direct) { |
| /* connect the TCH's to our RTP proxy */ |
| rc = rsl_ipacc_mdcx_to_rtpsock(lchan); |
| if (rc < 0) |
| return rc; |
| rc = rsl_ipacc_mdcx_to_rtpsock(remote_lchan); |
| #warning do we need a check of rc here? |
| |
| /* connect them with each other */ |
| rtp_socket_proxy(lchan->abis_ip.rtp_socket, |
| remote_lchan->abis_ip.rtp_socket); |
| } else { |
| /* directly connect TCH RTP streams to each other */ |
| rc = rsl_ipacc_mdcx(lchan, remote_lchan->abis_ip.bound_ip, |
| remote_lchan->abis_ip.bound_port, |
| remote_lchan->abis_ip.rtp_payload2); |
| if (rc < 0) |
| return rc; |
| rc = rsl_ipacc_mdcx(remote_lchan, lchan->abis_ip.bound_ip, |
| lchan->abis_ip.bound_port, |
| lchan->abis_ip.rtp_payload2); |
| } |
| break; |
| case GSM_BTS_TYPE_BS11: |
| trau_mux_map_lchan(lchan, remote_lchan); |
| break; |
| default: |
| DEBUGP(DCC, "Unknown BTS type %u\n", bts->type); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| /* bridge channels of two transactions */ |
| static int tch_bridge(struct gsm_network *net, u_int32_t *refs) |
| { |
| struct gsm_trans *trans1 = trans_find_by_callref(net, refs[0]); |
| struct gsm_trans *trans2 = trans_find_by_callref(net, refs[1]); |
| |
| if (!trans1 || !trans2) |
| return -EIO; |
| |
| if (!trans1->lchan || !trans2->lchan) |
| return -EIO; |
| |
| /* through-connect channel */ |
| return tch_map(trans1->lchan, trans2->lchan); |
| } |
| |
| /* enable receive of channels to MNCC upqueue */ |
| static int tch_recv_mncc(struct gsm_network *net, u_int32_t callref, int enable) |
| { |
| struct gsm_trans *trans; |
| struct gsm_lchan *lchan; |
| struct gsm_bts *bts; |
| int rc; |
| |
| /* Find callref */ |
| trans = trans_find_by_callref(net, callref); |
| if (!trans) |
| return -EIO; |
| if (!trans->lchan) |
| return 0; |
| lchan = trans->lchan; |
| bts = lchan->ts->trx->bts; |
| |
| switch (bts->type) { |
| case GSM_BTS_TYPE_NANOBTS: |
| if (ipacc_rtp_direct) { |
| DEBUGP(DCC, "Error: RTP proxy is disabled\n"); |
| return -EINVAL; |
| } |
| /* in case, we don't have a RTP socket yet, we note this |
| * in the transaction and try later */ |
| if (!lchan->abis_ip.rtp_socket) { |
| trans->tch_recv = enable; |
| DEBUGP(DCC, "queue tch_recv_mncc request (%d)\n", enable); |
| return 0; |
| } |
| if (enable) { |
| /* connect the TCH's to our RTP proxy */ |
| rc = rsl_ipacc_mdcx_to_rtpsock(lchan); |
| if (rc < 0) |
| return rc; |
| /* assign socket to application interface */ |
| rtp_socket_upstream(lchan->abis_ip.rtp_socket, |
| net, callref); |
| } else |
| rtp_socket_upstream(lchan->abis_ip.rtp_socket, |
| net, 0); |
| break; |
| case GSM_BTS_TYPE_BS11: |
| if (enable) |
| return trau_recv_lchan(lchan, callref); |
| return trau_mux_unmap(NULL, callref); |
| break; |
| default: |
| DEBUGP(DCC, "Unknown BTS type %u\n", bts->type); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| 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->subscr->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->subscr->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); |
| } |
| |
| } |
| |
| 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); |
| trans->cc.timer.cb = gsm48_cc_timeout; |
| trans->cc.timer.data = trans; |
| bsc_schedule_timer(&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); |
| u_int8_t msg_type = gh->msg_type & 0xbf; |
| 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, &rsl_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 */ |
| if (trans->subscr) { |
| setup.fields |= MNCC_F_CALLING; |
| strncpy(setup.calling.number, trans->subscr->extension, |
| sizeof(setup.calling.number)-1); |
| strncpy(setup.imsi, trans->subscr->imsi, |
| sizeof(setup.imsi)-1); |
| } |
| /* bearer capability */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_BEARER_CAP)) { |
| setup.fields |= MNCC_F_BEARER_CAP; |
| decode_bearer_cap(&setup.bearer_cap, |
| TLVP_VAL(&tp, GSM48_IE_BEARER_CAP)-1); |
| } |
| /* facility */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_FACILITY)) { |
| setup.fields |= MNCC_F_FACILITY; |
| 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; |
| 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; |
| 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; |
| 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; |
| decode_cccap(&setup.cccap, |
| TLVP_VAL(&tp, GSM48_IE_CC_CAP)-1); |
| } |
| |
| new_cc_state(trans, GSM_CSTATE_INITIATED); |
| |
| /* indicate setup to MNCC */ |
| mncc_recvmsg(trans->subscr->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(); |
| 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->subscr->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->subscr, GSM48_PDISC_CC, 0); |
| if (trans_id < 0) { |
| /* no free transaction ID */ |
| rc = mncc_release_ind(trans->subscr->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) |
| encode_bearer_cap(msg, 0, &setup->bearer_cap); |
| /* facility */ |
| if (setup->fields & MNCC_F_FACILITY) |
| encode_facility(msg, 0, &setup->facility); |
| /* progress */ |
| if (setup->fields & MNCC_F_PROGRESS) |
| encode_progress(msg, 0, &setup->progress); |
| /* calling party BCD number */ |
| if (setup->fields & MNCC_F_CALLING) |
| encode_calling(msg, &setup->calling); |
| /* called party BCD number */ |
| if (setup->fields & MNCC_F_CALLED) |
| encode_called(msg, &setup->called); |
| /* user-user */ |
| if (setup->fields & MNCC_F_USERUSER) |
| encode_useruser(msg, 0, &setup->useruser); |
| /* redirecting party BCD number */ |
| if (setup->fields & MNCC_F_REDIRECTING) |
| encode_redirecting(msg, &setup->redirecting); |
| /* signal */ |
| if (setup->fields & MNCC_F_SIGNAL) |
| encode_signal(msg, setup->signal); |
| |
| new_cc_state(trans, GSM_CSTATE_CALL_PRESENT); |
| |
| return gsm48_sendmsg(msg, 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; |
| |
| 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, &rsl_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; |
| decode_bearer_cap(&call_conf.bearer_cap, |
| TLVP_VAL(&tp, GSM48_IE_BEARER_CAP)-1); |
| } |
| /* cause */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_CAUSE)) { |
| call_conf.fields |= MNCC_F_CAUSE; |
| 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; |
| decode_cccap(&call_conf.cccap, |
| TLVP_VAL(&tp, GSM48_IE_CC_CAP)-1); |
| } |
| |
| new_cc_state(trans, GSM_CSTATE_MO_TERM_CALL_CONF); |
| |
| return mncc_recvmsg(trans->subscr->net, trans, MNCC_CALL_CONF_IND, |
| &call_conf); |
| } |
| |
| static int gsm48_cc_tx_call_proc(struct gsm_trans *trans, void *arg) |
| { |
| struct gsm_mncc *proceeding = arg; |
| struct msgb *msg = gsm48_msgb_alloc(); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| |
| 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) |
| encode_bearer_cap(msg, 0, &proceeding->bearer_cap); |
| /* facility */ |
| if (proceeding->fields & MNCC_F_FACILITY) |
| encode_facility(msg, 0, &proceeding->facility); |
| /* progress */ |
| if (proceeding->fields & MNCC_F_PROGRESS) |
| encode_progress(msg, 0, &proceeding->progress); |
| |
| return gsm48_sendmsg(msg, trans); |
| } |
| |
| 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, &rsl_att_tlvdef, gh->data, payload_len, 0, 0); |
| /* facility */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_FACILITY)) { |
| alerting.fields |= MNCC_F_FACILITY; |
| 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; |
| 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; |
| decode_ssversion(&alerting.ssversion, |
| TLVP_VAL(&tp, GSM48_IE_SS_VERS)-1); |
| } |
| |
| new_cc_state(trans, GSM_CSTATE_CALL_RECEIVED); |
| |
| return mncc_recvmsg(trans->subscr->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(); |
| 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) |
| encode_facility(msg, 0, &alerting->facility); |
| /* progress */ |
| if (alerting->fields & MNCC_F_PROGRESS) |
| encode_progress(msg, 0, &alerting->progress); |
| /* user-user */ |
| if (alerting->fields & MNCC_F_USERUSER) |
| encode_useruser(msg, 0, &alerting->useruser); |
| |
| new_cc_state(trans, GSM_CSTATE_CALL_DELIVERED); |
| |
| return gsm48_sendmsg(msg, trans); |
| } |
| |
| static int gsm48_cc_tx_progress(struct gsm_trans *trans, void *arg) |
| { |
| struct gsm_mncc *progress = arg; |
| struct msgb *msg = gsm48_msgb_alloc(); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| |
| gh->msg_type = GSM48_MT_CC_PROGRESS; |
| |
| /* progress */ |
| encode_progress(msg, 1, &progress->progress); |
| /* user-user */ |
| if (progress->fields & MNCC_F_USERUSER) |
| encode_useruser(msg, 0, &progress->useruser); |
| |
| return gsm48_sendmsg(msg, trans); |
| } |
| |
| static int gsm48_cc_tx_connect(struct gsm_trans *trans, void *arg) |
| { |
| struct gsm_mncc *connect = arg; |
| struct msgb *msg = gsm48_msgb_alloc(); |
| 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) |
| encode_facility(msg, 0, &connect->facility); |
| /* progress */ |
| if (connect->fields & MNCC_F_PROGRESS) |
| encode_progress(msg, 0, &connect->progress); |
| /* connected number */ |
| if (connect->fields & MNCC_F_CONNECTED) |
| encode_connected(msg, &connect->connected); |
| /* user-user */ |
| if (connect->fields & MNCC_F_USERUSER) |
| encode_useruser(msg, 0, &connect->useruser); |
| |
| new_cc_state(trans, GSM_CSTATE_CONNECT_IND); |
| |
| return gsm48_sendmsg(msg, 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, &rsl_att_tlvdef, gh->data, payload_len, 0, 0); |
| /* use subscriber as connected party number */ |
| if (trans->subscr) { |
| connect.fields |= MNCC_F_CONNECTED; |
| strncpy(connect.connected.number, trans->subscr->extension, |
| sizeof(connect.connected.number)-1); |
| strncpy(connect.imsi, trans->subscr->imsi, |
| sizeof(connect.imsi)-1); |
| } |
| /* facility */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_FACILITY)) { |
| connect.fields |= MNCC_F_FACILITY; |
| 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; |
| 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; |
| decode_ssversion(&connect.ssversion, |
| TLVP_VAL(&tp, GSM48_IE_SS_VERS)-1); |
| } |
| |
| new_cc_state(trans, GSM_CSTATE_CONNECT_REQUEST); |
| |
| return mncc_recvmsg(trans->subscr->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); |
| |
| memset(&connect_ack, 0, sizeof(struct gsm_mncc)); |
| connect_ack.callref = trans->callref; |
| return mncc_recvmsg(trans->subscr->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(); |
| 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_sendmsg(msg, 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, &rsl_att_tlvdef, gh->data, payload_len, GSM48_IE_CAUSE, 0); |
| /* cause */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_CAUSE)) { |
| disc.fields |= MNCC_F_CAUSE; |
| decode_cause(&disc.cause, |
| TLVP_VAL(&tp, GSM48_IE_CAUSE)-1); |
| } |
| /* facility */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_FACILITY)) { |
| disc.fields |= MNCC_F_FACILITY; |
| 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; |
| 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; |
| decode_ssversion(&disc.ssversion, |
| TLVP_VAL(&tp, GSM48_IE_SS_VERS)-1); |
| } |
| |
| return mncc_recvmsg(trans->subscr->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(); |
| 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) |
| encode_cause(msg, 1, &disc->cause); |
| else |
| encode_cause(msg, 1, &default_cause); |
| |
| /* facility */ |
| if (disc->fields & MNCC_F_FACILITY) |
| encode_facility(msg, 0, &disc->facility); |
| /* progress */ |
| if (disc->fields & MNCC_F_PROGRESS) |
| encode_progress(msg, 0, &disc->progress); |
| /* user-user */ |
| if (disc->fields & MNCC_F_USERUSER) |
| 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_sendmsg(msg, 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, &rsl_att_tlvdef, gh->data, payload_len, 0, 0); |
| /* cause */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_CAUSE)) { |
| rel.fields |= MNCC_F_CAUSE; |
| decode_cause(&rel.cause, |
| TLVP_VAL(&tp, GSM48_IE_CAUSE)-1); |
| } |
| /* facility */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_FACILITY)) { |
| rel.fields |= MNCC_F_FACILITY; |
| 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; |
| 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; |
| 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->subscr->net, trans, MNCC_REL_CNF, &rel); |
| } else { |
| rc = gsm48_tx_simple(msg->lchan, |
| GSM48_PDISC_CC | (trans->transaction_id << 4), |
| GSM48_MT_CC_RELEASE_COMPL); |
| rc = mncc_recvmsg(trans->subscr->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(); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| |
| gh->msg_type = GSM48_MT_CC_RELEASE; |
| |
| trans->callref = 0; |
| |
| gsm48_stop_cc_timer(trans); |
| gsm48_start_cc_timer(trans, 0x308, GSM48_T308); |
| |
| /* cause */ |
| if (rel->fields & MNCC_F_CAUSE) |
| encode_cause(msg, 0, &rel->cause); |
| /* facility */ |
| if (rel->fields & MNCC_F_FACILITY) |
| encode_facility(msg, 0, &rel->facility); |
| /* user-user */ |
| if (rel->fields & MNCC_F_USERUSER) |
| 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_sendmsg(msg, 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, &rsl_att_tlvdef, gh->data, payload_len, 0, 0); |
| /* cause */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_CAUSE)) { |
| rel.fields |= MNCC_F_CAUSE; |
| decode_cause(&rel.cause, |
| TLVP_VAL(&tp, GSM48_IE_CAUSE)-1); |
| } |
| /* facility */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_FACILITY)) { |
| rel.fields |= MNCC_F_FACILITY; |
| 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; |
| 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; |
| 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->subscr->net, trans, |
| MNCC_REJ_IND, &rel); |
| break; |
| case GSM_CSTATE_RELEASE_REQ: |
| rc = mncc_recvmsg(trans->subscr->net, trans, |
| MNCC_REL_CNF, &rel); |
| /* FIXME: in case of multiple calls, we can't simply |
| * hang up here ! */ |
| lchan_auto_release(msg->lchan); |
| break; |
| default: |
| rc = mncc_recvmsg(trans->subscr->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(); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| |
| gh->msg_type = GSM48_MT_CC_RELEASE_COMPL; |
| |
| trans->callref = 0; |
| |
| gsm48_stop_cc_timer(trans); |
| |
| /* cause */ |
| if (rel->fields & MNCC_F_CAUSE) |
| encode_cause(msg, 0, &rel->cause); |
| /* facility */ |
| if (rel->fields & MNCC_F_FACILITY) |
| encode_facility(msg, 0, &rel->facility); |
| /* user-user */ |
| if (rel->fields & MNCC_F_USERUSER) |
| encode_useruser(msg, 0, &rel->useruser); |
| |
| trans_free(trans); |
| |
| return gsm48_sendmsg(msg, trans); |
| } |
| |
| 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, &rsl_att_tlvdef, gh->data, payload_len, GSM48_IE_FACILITY, 0); |
| /* facility */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_FACILITY)) { |
| fac.fields |= MNCC_F_FACILITY; |
| 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; |
| decode_ssversion(&fac.ssversion, |
| TLVP_VAL(&tp, GSM48_IE_SS_VERS)-1); |
| } |
| |
| return mncc_recvmsg(trans->subscr->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(); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| |
| gh->msg_type = GSM48_MT_CC_FACILITY; |
| |
| /* facility */ |
| encode_facility(msg, 1, &fac->facility); |
| |
| return gsm48_sendmsg(msg, 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->subscr->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(); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| |
| gh->msg_type = GSM48_MT_CC_HOLD_ACK; |
| |
| return gsm48_sendmsg(msg, 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(); |
| 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) |
| encode_cause(msg, 1, &hold_rej->cause); |
| else |
| encode_cause(msg, 1, &default_cause); |
| |
| return gsm48_sendmsg(msg, 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->subscr->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(); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| |
| gh->msg_type = GSM48_MT_CC_RETR_ACK; |
| |
| return gsm48_sendmsg(msg, 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(); |
| 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) |
| encode_cause(msg, 1, &retrieve_rej->cause); |
| else |
| encode_cause(msg, 1, &default_cause); |
| |
| return gsm48_sendmsg(msg, 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, &rsl_att_tlvdef, gh->data, payload_len, 0, 0); |
| /* keypad facility */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_KPD_FACILITY)) { |
| dtmf.fields |= MNCC_F_KEYPAD; |
| decode_keypad(&dtmf.keypad, |
| TLVP_VAL(&tp, GSM48_IE_KPD_FACILITY)-1); |
| } |
| |
| return mncc_recvmsg(trans->subscr->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(); |
| 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) |
| encode_keypad(msg, dtmf->keypad); |
| |
| return gsm48_sendmsg(msg, 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(); |
| 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) |
| encode_cause(msg, 1, &dtmf->cause); |
| else |
| encode_cause(msg, 1, &default_cause); |
| |
| return gsm48_sendmsg(msg, trans); |
| } |
| |
| static int gsm48_cc_tx_stop_dtmf_ack(struct gsm_trans *trans, void *arg) |
| { |
| struct msgb *msg = gsm48_msgb_alloc(); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| |
| gh->msg_type = GSM48_MT_CC_STOP_DTMF_ACK; |
| |
| return gsm48_sendmsg(msg, 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->subscr->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, &rsl_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; |
| decode_bearer_cap(&modify.bearer_cap, |
| TLVP_VAL(&tp, GSM48_IE_BEARER_CAP)-1); |
| } |
| |
| new_cc_state(trans, GSM_CSTATE_MO_ORIG_MODIFY); |
| |
| return mncc_recvmsg(trans->subscr->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(); |
| 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 */ |
| encode_bearer_cap(msg, 1, &modify->bearer_cap); |
| |
| new_cc_state(trans, GSM_CSTATE_MO_TERM_MODIFY); |
| |
| return gsm48_sendmsg(msg, 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, &rsl_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; |
| decode_bearer_cap(&modify.bearer_cap, |
| TLVP_VAL(&tp, GSM48_IE_BEARER_CAP)-1); |
| } |
| |
| new_cc_state(trans, GSM_CSTATE_ACTIVE); |
| |
| return mncc_recvmsg(trans->subscr->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(); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| |
| gh->msg_type = GSM48_MT_CC_MODIFY_COMPL; |
| |
| /* bearer capability */ |
| encode_bearer_cap(msg, 1, &modify->bearer_cap); |
| |
| new_cc_state(trans, GSM_CSTATE_ACTIVE); |
| |
| return gsm48_sendmsg(msg, 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, &rsl_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; |
| decode_bearer_cap(&modify.bearer_cap, |
| TLVP_VAL(&tp, GSM48_IE_BEARER_CAP)-1); |
| } |
| /* cause */ |
| if (TLVP_PRESENT(&tp, GSM48_IE_CAUSE)) { |
| modify.fields |= MNCC_F_CAUSE; |
| decode_cause(&modify.cause, |
| TLVP_VAL(&tp, GSM48_IE_CAUSE)-1); |
| } |
| |
| new_cc_state(trans, GSM_CSTATE_ACTIVE); |
| |
| return mncc_recvmsg(trans->subscr->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(); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| |
| gh->msg_type = GSM48_MT_CC_MODIFY_REJECT; |
| |
| /* bearer capability */ |
| encode_bearer_cap(msg, 1, &modify->bearer_cap); |
| /* cause */ |
| encode_cause(msg, 1, &modify->cause); |
| |
| new_cc_state(trans, GSM_CSTATE_ACTIVE); |
| |
| return gsm48_sendmsg(msg, trans); |
| } |
| |
| static int gsm48_cc_tx_notify(struct gsm_trans *trans, void *arg) |
| { |
| struct gsm_mncc *notify = arg; |
| struct msgb *msg = gsm48_msgb_alloc(); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| |
| gh->msg_type = GSM48_MT_CC_NOTIFY; |
| |
| /* notify */ |
| encode_notify(msg, notify->notify); |
| |
| return gsm48_sendmsg(msg, 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, &rsl_att_tlvdef, gh->data, payload_len); |
| if (payload_len >= 1) |
| decode_notify(¬ify.notify, gh->data); |
| |
| return mncc_recvmsg(trans->subscr->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(); |
| 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) |
| encode_useruser(msg, 1, &user->useruser); |
| /* more data */ |
| if (user->more) |
| encode_more(msg); |
| |
| return gsm48_sendmsg(msg, 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, &rsl_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; |
| 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->subscr->net, trans, MNCC_USERINFO_IND, &user); |
| } |
| |
| static int _gsm48_lchan_modify(struct gsm_trans *trans, void *arg) |
| { |
| struct gsm_mncc *mode = arg; |
| |
| return gsm48_lchan_modify(trans->lchan, mode->lchan_mode); |
| } |
| |
| static struct downstate { |
| u_int32_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}, |
| {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}, |
| /* special */ |
| {ALL_STATES, |
| MNCC_LCHAN_MODIFY, _gsm48_lchan_modify}, |
| }; |
| |
| #define DOWNSLLEN \ |
| (sizeof(downstatelist) / sizeof(struct downstate)) |
| |
| |
| int mncc_send(struct gsm_network *net, int msg_type, void *arg) |
| { |
| int i, rc = 0; |
| struct gsm_trans *trans = NULL, *transt; |
| struct gsm_lchan *lchan = NULL; |
| struct gsm_bts *bts = NULL; |
| struct gsm_mncc *data = arg, rel; |
| |
| /* handle special messages */ |
| switch(msg_type) { |
| case MNCC_BRIDGE: |
| return tch_bridge(net, arg); |
| case MNCC_FRAME_DROP: |
| return tch_recv_mncc(net, data->callref, 0); |
| case MNCC_FRAME_RECV: |
| return tch_recv_mncc(net, data->callref, 1); |
| case GSM_TCHF_FRAME: |
| /* Find callref */ |
| trans = trans_find_by_callref(net, data->callref); |
| if (!trans) |
| return -EIO; |
| if (!trans->lchan) |
| return 0; |
| if (trans->lchan->type != GSM_LCHAN_TCH_F) |
| return 0; |
| bts = trans->lchan->ts->trx->bts; |
| switch (bts->type) { |
| case GSM_BTS_TYPE_NANOBTS: |
| if (!trans->lchan->abis_ip.rtp_socket) |
| return 0; |
| return rtp_send_frame(trans->lchan->abis_ip.rtp_socket, arg); |
| case GSM_BTS_TYPE_BS11: |
| return trau_send_frame(trans->lchan, arg); |
| default: |
| DEBUGP(DCC, "Unknown BTS type %u\n", bts->type); |
| } |
| return -EINVAL; |
| } |
| |
| 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 gsm_subscriber *subscr; |
| |
| 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]) |
| subscr = subscr_get_by_extension(net, |
| data->called.number); |
| else |
| subscr = subscr_get_by_imsi(net, data->imsi); |
| /* If subscriber is not found */ |
| if (!subscr) { |
| 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 (!subscr->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); |
| subscr_put(subscr); |
| /* 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(subscr, GSM48_PDISC_CC, 0xff, data->callref); |
| if (!trans) { |
| DEBUGP(DCC, "No memory for trans.\n"); |
| subscr_put(subscr); |
| /* Ressource unavailable */ |
| mncc_release_ind(net, NULL, data->callref, |
| GSM48_CAUSE_LOC_PRN_S_LU, |
| GSM48_CC_CAUSE_RESOURCE_UNAVAIL); |
| return -ENOMEM; |
| } |
| /* Find lchan */ |
| lchan = lchan_for_subscr(subscr); |
| /* If subscriber has no lchan */ |
| if (!lchan) { |
| /* find transaction with this subscriber already paging */ |
| llist_for_each_entry(transt, &net->trans_list, entry) { |
| /* Transaction of our lchan? */ |
| if (transt == trans || |
| transt->subscr != subscr) |
| continue; |
| DEBUGP(DCC, "(bts %d trx - ts - ti -- sub %s) " |
| "Received '%s' from MNCC with " |
| "unallocated channel, paging already " |
| "started.\n", bts->nr, |
| data->called.number, |
| get_mncc_name(msg_type)); |
| subscr_put(subscr); |
| trans_free(trans); |
| return 0; |
| } |
| /* store setup informations until paging was successfull */ |
| memcpy(&trans->cc.msg, data, sizeof(struct gsm_mncc)); |
| /* Trigger paging */ |
| paging_request(net, subscr, RSL_CHANNEED_TCH_F, |
| setup_trig_pag_evt, subscr); |
| subscr_put(subscr); |
| return 0; |
| } |
| /* Assign lchan */ |
| trans->lchan = lchan; |
| use_lchan(lchan); |
| subscr_put(subscr); |
| } |
| lchan = trans->lchan; |
| |
| /* if paging did not respond yet */ |
| if (!lchan) { |
| DEBUGP(DCC, "(bts - trx - ts - ti -- sub %s) " |
| "Received '%s' from MNCC in paging state\n", |
| (trans->subscr)?(trans->subscr->extension):"-", |
| 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, "(bts %d trx %d ts %d ti %02x sub %s) " |
| "Received '%s' from MNCC in state %d (%s)\n", |
| lchan->ts->trx->bts->nr, lchan->ts->trx->nr, lchan->ts->nr, |
| trans->transaction_id, |
| (lchan->subscr)?(lchan->subscr->extension):"-", |
| get_mncc_name(msg_type), trans->cc.state, |
| cc_state_names[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 { |
| u_int32_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 msgb *msg) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| u_int8_t msg_type = gh->msg_type & 0xbf; |
| u_int8_t transaction_id = ((gh->proto_discr & 0xf0) ^ 0x80) >> 4; /* flip */ |
| struct gsm_lchan *lchan = msg->lchan; |
| 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; |
| } |
| |
| /* Find transaction */ |
| trans = trans_find_by_id(lchan->subscr, GSM48_PDISC_CC, transaction_id); |
| |
| DEBUGP(DCC, "(bts %d trx %d ts %d ti %x sub %s) " |
| "Received '%s' from MS in state %d (%s)\n", |
| lchan->ts->trx->bts->nr, lchan->ts->trx->nr, lchan->ts->nr, |
| transaction_id, (lchan->subscr)?(lchan->subscr->extension):"-", |
| gsm0408_cc_msg_names[msg_type], trans?(trans->cc.state):0, |
| cc_state_names[trans?(trans->cc.state):0]); |
| |
| /* Create transaction */ |
| if (!trans) { |
| DEBUGP(DCC, "Unknown transaction ID %x, " |
| "creating new trans.\n", transaction_id); |
| /* Create transaction */ |
| trans = trans_alloc(lchan->subscr, GSM48_PDISC_CC, |
| transaction_id, new_callref++); |
| if (!trans) { |
| DEBUGP(DCC, "No memory for trans.\n"); |
| rc = gsm48_tx_simple(msg->lchan, |
| GSM48_PDISC_CC | (transaction_id << 4), |
| GSM48_MT_CC_RELEASE_COMPL); |
| return -ENOMEM; |
| } |
| /* Assign transaction */ |
| trans->lchan = lchan; |
| use_lchan(lchan); |
| } |
| |
| /* 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; |
| } |
| |
| rc = datastatelist[i].rout(trans, msg); |
| |
| return rc; |
| } |
| |
| /* here we pass in a msgb from the RSL->RLL. We expect the l3 pointer to be set */ |
| int gsm0408_rcvmsg(struct msgb *msg, u_int8_t link_id) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| u_int8_t pdisc = gh->proto_discr & 0x0f; |
| int rc = 0; |
| |
| switch (pdisc) { |
| case GSM48_PDISC_CC: |
| rc = gsm0408_rcv_cc(msg); |
| break; |
| case GSM48_PDISC_MM: |
| rc = gsm0408_rcv_mm(msg); |
| break; |
| case GSM48_PDISC_RR: |
| rc = gsm0408_rcv_rr(msg); |
| break; |
| case GSM48_PDISC_SMS: |
| rc = gsm0411_rcv_sms(msg, link_id); |
| break; |
| case GSM48_PDISC_MM_GPRS: |
| case GSM48_PDISC_SM_GPRS: |
| fprintf(stderr, "Unimplemented GSM 04.08 discriminator 0x%02x\n", |
| pdisc); |
| break; |
| case GSM48_PDISC_NC_SS: |
| rc = handle_rcv_ussd(msg); |
| break; |
| default: |
| fprintf(stderr, "Unknown GSM 04.08 discriminator 0x%02x\n", |
| pdisc); |
| break; |
| } |
| |
| return rc; |
| } |
| |
| /* dequeue messages to layer 4 */ |
| int bsc_upqueue(struct gsm_network *net) |
| { |
| struct gsm_mncc *mncc; |
| struct msgb *msg; |
| int work = 0; |
| |
| if (net) |
| while ((msg = msgb_dequeue(&net->upqueue))) { |
| mncc = (struct gsm_mncc *)msg->data; |
| if (net->mncc_recv) |
| net->mncc_recv(net, mncc->msg_type, mncc); |
| work = 1; /* work done */ |
| talloc_free(msg); |
| } |
| |
| return work; |
| } |
| |
| /* |
| * This will be ran by the linker when loading the DSO. We use it to |
| * do system initialization, e.g. registration of signal handlers. |
| */ |
| static __attribute__((constructor)) void on_dso_load_0408(void) |
| { |
| register_signal_handler(SS_LCHAN, gsm0408_handle_lchan_signal, NULL); |
| register_signal_handler(SS_ABISIP, handle_abisip_signal, NULL); |
| } |