| /* 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 |
| * utility functions |
| */ |
| |
| /* (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 <errno.h> |
| #include <netinet/in.h> |
| |
| #include <osmocore/msgb.h> |
| #include <osmocore/gsm48.h> |
| #include <openbsc/debug.h> |
| #include <openbsc/gsm_04_08.h> |
| #include <openbsc/transaction.h> |
| #include <openbsc/paging.h> |
| #include <openbsc/signal.h> |
| |
| /* should ip.access BTS use direct RTP streams between each other (1), |
| * or should OpenBSC always act as RTP relay/proxy in between (0) ? */ |
| int ipacc_rtp_direct = 1; |
| |
| static int gsm48_sendmsg(struct msgb *msg) |
| { |
| if (msg->lchan) |
| msg->trx = msg->lchan->ts->trx; |
| |
| msg->l3h = msg->data; |
| return rsl_data_request(msg, 0); |
| } |
| |
| /* Section 9.1.8 / Table 9.9 */ |
| struct chreq { |
| u_int8_t val; |
| u_int8_t mask; |
| enum chreq_type type; |
| }; |
| |
| /* If SYSTEM INFORMATION TYPE 4 NECI bit == 1 */ |
| static const struct chreq chreq_type_neci1[] = { |
| { 0xa0, 0xe0, CHREQ_T_EMERG_CALL }, |
| { 0xc0, 0xe0, CHREQ_T_CALL_REEST_TCH_F }, |
| { 0x68, 0xfc, CHREQ_T_CALL_REEST_TCH_H }, |
| { 0x6c, 0xfc, CHREQ_T_CALL_REEST_TCH_H_DBL }, |
| { 0xe0, 0xe0, CHREQ_T_SDCCH }, |
| { 0x40, 0xf0, CHREQ_T_VOICE_CALL_TCH_H }, |
| { 0x50, 0xf0, CHREQ_T_DATA_CALL_TCH_H }, |
| { 0x00, 0xf0, CHREQ_T_LOCATION_UPD }, |
| { 0x10, 0xf0, CHREQ_T_SDCCH }, |
| { 0x80, 0xe0, CHREQ_T_PAG_R_ANY_NECI1 }, |
| { 0x20, 0xf0, CHREQ_T_PAG_R_TCH_F }, |
| { 0x30, 0xf0, CHREQ_T_PAG_R_TCH_FH }, |
| { 0x67, 0xff, CHREQ_T_LMU }, |
| { 0x60, 0xf9, CHREQ_T_RESERVED_SDCCH }, |
| { 0x61, 0xfb, CHREQ_T_RESERVED_SDCCH }, |
| { 0x63, 0xff, CHREQ_T_RESERVED_SDCCH }, |
| { 0x7f, 0xff, CHREQ_T_RESERVED_IGNORE }, |
| }; |
| |
| /* If SYSTEM INFORMATION TYPE 4 NECI bit == 0 */ |
| static const struct chreq chreq_type_neci0[] = { |
| { 0xa0, 0xe0, CHREQ_T_EMERG_CALL }, |
| { 0xc0, 0xe0, CHREQ_T_CALL_REEST_TCH_H }, |
| { 0xe0, 0xe0, CHREQ_T_TCH_F }, |
| { 0x50, 0xf0, CHREQ_T_DATA_CALL_TCH_H }, |
| { 0x00, 0xe0, CHREQ_T_LOCATION_UPD }, |
| { 0x80, 0xe0, CHREQ_T_PAG_R_ANY_NECI0 }, |
| { 0x20, 0xf0, CHREQ_T_PAG_R_TCH_F }, |
| { 0x30, 0xf0, CHREQ_T_PAG_R_TCH_FH }, |
| { 0x67, 0xff, CHREQ_T_LMU }, |
| { 0x60, 0xf9, CHREQ_T_RESERVED_SDCCH }, |
| { 0x61, 0xfb, CHREQ_T_RESERVED_SDCCH }, |
| { 0x63, 0xff, CHREQ_T_RESERVED_SDCCH }, |
| { 0x7f, 0xff, CHREQ_T_RESERVED_IGNORE }, |
| }; |
| |
| static const enum gsm_chan_t ctype_by_chreq[] = { |
| [CHREQ_T_EMERG_CALL] = GSM_LCHAN_TCH_F, |
| [CHREQ_T_CALL_REEST_TCH_F] = GSM_LCHAN_TCH_F, |
| [CHREQ_T_CALL_REEST_TCH_H] = GSM_LCHAN_TCH_H, |
| [CHREQ_T_CALL_REEST_TCH_H_DBL] = GSM_LCHAN_TCH_H, |
| [CHREQ_T_SDCCH] = GSM_LCHAN_SDCCH, |
| [CHREQ_T_TCH_F] = GSM_LCHAN_TCH_F, |
| [CHREQ_T_VOICE_CALL_TCH_H] = GSM_LCHAN_TCH_H, |
| [CHREQ_T_DATA_CALL_TCH_H] = GSM_LCHAN_TCH_H, |
| [CHREQ_T_LOCATION_UPD] = GSM_LCHAN_SDCCH, |
| [CHREQ_T_PAG_R_ANY_NECI1] = GSM_LCHAN_SDCCH, |
| [CHREQ_T_PAG_R_ANY_NECI0] = GSM_LCHAN_SDCCH, |
| [CHREQ_T_PAG_R_TCH_F] = GSM_LCHAN_TCH_F, |
| [CHREQ_T_PAG_R_TCH_FH] = GSM_LCHAN_TCH_F, |
| [CHREQ_T_LMU] = GSM_LCHAN_SDCCH, |
| [CHREQ_T_RESERVED_SDCCH] = GSM_LCHAN_SDCCH, |
| [CHREQ_T_RESERVED_IGNORE] = GSM_LCHAN_UNKNOWN, |
| }; |
| |
| static const enum gsm_chreq_reason_t reason_by_chreq[] = { |
| [CHREQ_T_EMERG_CALL] = GSM_CHREQ_REASON_EMERG, |
| [CHREQ_T_CALL_REEST_TCH_F] = GSM_CHREQ_REASON_CALL, |
| [CHREQ_T_CALL_REEST_TCH_H] = GSM_CHREQ_REASON_CALL, |
| [CHREQ_T_CALL_REEST_TCH_H_DBL] = GSM_CHREQ_REASON_CALL, |
| [CHREQ_T_SDCCH] = GSM_CHREQ_REASON_OTHER, |
| [CHREQ_T_TCH_F] = GSM_CHREQ_REASON_OTHER, |
| [CHREQ_T_VOICE_CALL_TCH_H] = GSM_CHREQ_REASON_CALL, |
| [CHREQ_T_DATA_CALL_TCH_H] = GSM_CHREQ_REASON_OTHER, |
| [CHREQ_T_LOCATION_UPD] = GSM_CHREQ_REASON_LOCATION_UPD, |
| [CHREQ_T_PAG_R_ANY_NECI1] = GSM_CHREQ_REASON_PAG, |
| [CHREQ_T_PAG_R_ANY_NECI0] = GSM_CHREQ_REASON_PAG, |
| [CHREQ_T_PAG_R_TCH_F] = GSM_CHREQ_REASON_PAG, |
| [CHREQ_T_PAG_R_TCH_FH] = GSM_CHREQ_REASON_PAG, |
| [CHREQ_T_LMU] = GSM_CHREQ_REASON_OTHER, |
| [CHREQ_T_RESERVED_SDCCH] = GSM_CHREQ_REASON_OTHER, |
| [CHREQ_T_RESERVED_IGNORE] = GSM_CHREQ_REASON_OTHER, |
| }; |
| |
| enum gsm_chan_t get_ctype_by_chreq(struct gsm_bts *bts, u_int8_t ra, int neci) |
| { |
| int i; |
| int length; |
| const struct chreq *chreq; |
| |
| if (neci) { |
| chreq = chreq_type_neci1; |
| length = ARRAY_SIZE(chreq_type_neci1); |
| } else { |
| chreq = chreq_type_neci0; |
| length = ARRAY_SIZE(chreq_type_neci0); |
| } |
| |
| |
| for (i = 0; i < length; i++) { |
| const struct chreq *chr = &chreq[i]; |
| if ((ra & chr->mask) == chr->val) |
| return ctype_by_chreq[chr->type]; |
| } |
| LOGP(DRR, LOGL_ERROR, "Unknown CHANNEL REQUEST RQD 0x%02x\n", ra); |
| return GSM_LCHAN_SDCCH; |
| } |
| |
| enum gsm_chreq_reason_t get_reason_by_chreq(struct gsm_bts *bts, u_int8_t ra, int neci) |
| { |
| int i; |
| int length; |
| const struct chreq *chreq; |
| |
| if (neci) { |
| chreq = chreq_type_neci1; |
| length = ARRAY_SIZE(chreq_type_neci1); |
| } else { |
| chreq = chreq_type_neci0; |
| length = ARRAY_SIZE(chreq_type_neci0); |
| } |
| |
| for (i = 0; i < length; i++) { |
| const struct chreq *chr = &chreq[i]; |
| if ((ra & chr->mask) == chr->val) |
| return reason_by_chreq[chr->type]; |
| } |
| LOGP(DRR, LOGL_ERROR, "Unknown CHANNEL REQUEST REASON 0x%02x\n", ra); |
| return GSM_CHREQ_REASON_OTHER; |
| } |
| |
| /* 7.1.7 and 9.1.7: RR CHANnel RELease */ |
| int gsm48_send_rr_release(struct gsm_lchan *lchan) |
| { |
| struct msgb *msg = gsm48_msgb_alloc(); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| u_int8_t *cause; |
| |
| msg->lchan = lchan; |
| gh->proto_discr = GSM48_PDISC_RR; |
| gh->msg_type = GSM48_MT_RR_CHAN_REL; |
| |
| cause = msgb_put(msg, 1); |
| cause[0] = GSM48_RR_CAUSE_NORMAL; |
| |
| DEBUGP(DRR, "Sending Channel Release: Chan: Number: %d Type: %d\n", |
| lchan->nr, lchan->type); |
| |
| /* Send actual release request to MS */ |
| gsm48_sendmsg(msg); |
| /* FIXME: Start Timer T3109 */ |
| |
| /* Deactivate the SACCH on the BTS side */ |
| return rsl_deact_sacch(lchan); |
| } |
| |
| int send_siemens_mrpci(struct gsm_lchan *lchan, |
| u_int8_t *classmark2_lv) |
| { |
| struct rsl_mrpci mrpci; |
| |
| if (classmark2_lv[0] < 2) |
| return -EINVAL; |
| |
| mrpci.power_class = classmark2_lv[1] & 0x7; |
| mrpci.vgcs_capable = classmark2_lv[2] & (1 << 1); |
| mrpci.vbs_capable = classmark2_lv[2] & (1 <<2); |
| mrpci.gsm_phase = (classmark2_lv[1]) >> 5 & 0x3; |
| |
| return rsl_siemens_mrpci(lchan, &mrpci); |
| } |
| |
| int gsm48_extract_mi(uint8_t *classmark2_lv, int length, char *mi_string, uint8_t *mi_type) |
| { |
| /* Check the size for the classmark */ |
| if (length < 1 + *classmark2_lv) |
| return -1; |
| |
| u_int8_t *mi_lv = classmark2_lv + *classmark2_lv + 1; |
| if (length < 2 + *classmark2_lv + mi_lv[0]) |
| return -2; |
| |
| *mi_type = mi_lv[1] & GSM_MI_TYPE_MASK; |
| return gsm48_mi_to_string(mi_string, GSM48_MI_SIZE, mi_lv+1, *mi_lv); |
| } |
| |
| int gsm48_paging_extract_mi(struct gsm48_pag_resp *resp, int length, |
| char *mi_string, u_int8_t *mi_type) |
| { |
| static const uint32_t classmark_offset = |
| offsetof(struct gsm48_pag_resp, classmark2); |
| u_int8_t *classmark2_lv = (uint8_t *) &resp->classmark2; |
| return gsm48_extract_mi(classmark2_lv, length - classmark_offset, |
| mi_string, mi_type); |
| } |
| |
| int gsm48_handle_paging_resp(struct gsm_subscriber_connection *conn, |
| struct msgb *msg, struct gsm_subscriber *subscr) |
| { |
| struct gsm_bts *bts = msg->lchan->ts->trx->bts; |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| u_int8_t *classmark2_lv = gh->data + 1; |
| struct paging_signal_data sig_data; |
| |
| if (is_siemens_bts(bts)) |
| send_siemens_mrpci(msg->lchan, classmark2_lv); |
| |
| if (!conn->subscr) { |
| conn->subscr = subscr; |
| } else if (conn->subscr != subscr) { |
| LOGP(DRR, LOGL_ERROR, "<- Channel already owned by someone else?\n"); |
| subscr_put(subscr); |
| return -EINVAL; |
| } else { |
| DEBUGP(DRR, "<- Channel already owned by us\n"); |
| subscr_put(subscr); |
| subscr = conn->subscr; |
| } |
| |
| sig_data.subscr = subscr; |
| sig_data.bts = conn->bts; |
| sig_data.conn = conn; |
| |
| counter_inc(bts->network->stats.paging.completed); |
| |
| dispatch_signal(SS_PAGING, S_PAGING_SUCCEEDED, &sig_data); |
| |
| /* Stop paging on the bts we received the paging response */ |
| paging_request_stop(conn->bts, subscr, conn); |
| return 0; |
| } |
| |
| /* Chapter 9.1.9: Ciphering Mode Command */ |
| int gsm48_send_rr_ciph_mode(struct gsm_lchan *lchan, int want_imeisv) |
| { |
| struct msgb *msg = gsm48_msgb_alloc(); |
| struct gsm48_hdr *gh; |
| u_int8_t ciph_mod_set; |
| |
| msg->lchan = lchan; |
| |
| DEBUGP(DRR, "TX CIPHERING MODE CMD\n"); |
| |
| if (lchan->encr.alg_id <= RSL_ENC_ALG_A5(0)) |
| ciph_mod_set = 0; |
| else |
| ciph_mod_set = (lchan->encr.alg_id-2)<<1 | 1; |
| |
| gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| gh->proto_discr = GSM48_PDISC_RR; |
| gh->msg_type = GSM48_MT_RR_CIPH_M_CMD; |
| gh->data[0] = (want_imeisv & 0x1) << 4 | (ciph_mod_set & 0xf); |
| |
| return rsl_encryption_cmd(msg); |
| } |
| |
| static void gsm48_cell_desc(struct gsm48_cell_desc *cd, |
| const struct gsm_bts *bts) |
| { |
| cd->ncc = (bts->bsic >> 3 & 0x7); |
| cd->bcc = (bts->bsic & 0x7); |
| cd->arfcn_hi = bts->c0->arfcn >> 8; |
| cd->arfcn_lo = bts->c0->arfcn & 0xff; |
| } |
| |
| void gsm48_lchan2chan_desc(struct gsm48_chan_desc *cd, |
| const struct gsm_lchan *lchan) |
| { |
| u_int16_t arfcn = lchan->ts->trx->arfcn & 0x3ff; |
| |
| cd->chan_nr = lchan2chan_nr(lchan); |
| if (!lchan->ts->hopping.enabled) { |
| cd->h0.tsc = lchan->ts->trx->bts->tsc; |
| cd->h0.h = 0; |
| cd->h0.arfcn_high = arfcn >> 8; |
| cd->h0.arfcn_low = arfcn & 0xff; |
| } else { |
| cd->h1.tsc = lchan->ts->trx->bts->tsc; |
| cd->h1.h = 1; |
| cd->h1.maio_high = lchan->ts->hopping.maio >> 2; |
| cd->h1.maio_low = lchan->ts->hopping.maio & 0x03; |
| cd->h1.hsn = lchan->ts->hopping.hsn; |
| } |
| } |
| |
| #define GSM48_HOCMD_CCHDESC_LEN 16 |
| |
| /* Chapter 9.1.15: Handover Command */ |
| int gsm48_send_ho_cmd(struct gsm_lchan *old_lchan, struct gsm_lchan *new_lchan, |
| u_int8_t power_command, u_int8_t ho_ref) |
| { |
| struct msgb *msg = gsm48_msgb_alloc(); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| struct gsm48_ho_cmd *ho = |
| (struct gsm48_ho_cmd *) msgb_put(msg, sizeof(*ho)); |
| |
| msg->lchan = old_lchan; |
| gh->proto_discr = GSM48_PDISC_RR; |
| gh->msg_type = GSM48_MT_RR_HANDO_CMD; |
| |
| /* mandatory bits */ |
| gsm48_cell_desc(&ho->cell_desc, new_lchan->ts->trx->bts); |
| gsm48_lchan2chan_desc(&ho->chan_desc, new_lchan); |
| ho->ho_ref = ho_ref; |
| ho->power_command = power_command; |
| |
| if (new_lchan->ts->hopping.enabled) { |
| struct gsm_bts *bts = new_lchan->ts->trx->bts; |
| struct gsm48_system_information_type_1 *si1; |
| uint8_t *cur; |
| |
| si1 = GSM_BTS_SI(bts, SYSINFO_TYPE_1); |
| /* Copy the Cell Chan Desc (ARFCNS in this cell) */ |
| msgb_put_u8(msg, GSM48_IE_CELL_CH_DESC); |
| cur = msgb_put(msg, GSM48_HOCMD_CCHDESC_LEN); |
| memcpy(cur, si1->cell_channel_description, |
| GSM48_HOCMD_CCHDESC_LEN); |
| /* Copy the Mobile Allocation */ |
| msgb_tlv_put(msg, GSM48_IE_MA_BEFORE, |
| new_lchan->ts->hopping.ma_len, |
| new_lchan->ts->hopping.ma_data); |
| } |
| /* FIXME: optional bits for type of synchronization? */ |
| |
| return gsm48_sendmsg(msg); |
| } |
| |
| /* Chapter 9.1.2: Assignment Command */ |
| int gsm48_send_rr_ass_cmd(struct gsm_lchan *dest_lchan, struct gsm_lchan *lchan, u_int8_t power_command) |
| { |
| struct msgb *msg = gsm48_msgb_alloc(); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| struct gsm48_ass_cmd *ass = |
| (struct gsm48_ass_cmd *) msgb_put(msg, sizeof(*ass)); |
| |
| DEBUGP(DRR, "-> ASSIGNMENT COMMAND tch_mode=0x%02x\n", lchan->tch_mode); |
| |
| msg->lchan = dest_lchan; |
| gh->proto_discr = GSM48_PDISC_RR; |
| gh->msg_type = GSM48_MT_RR_ASS_CMD; |
| |
| /* |
| * fill the channel information element, this code |
| * should probably be shared with rsl_rx_chan_rqd(), |
| * gsm48_tx_chan_mode_modify. But beware that 10.5.2.5 |
| * 10.5.2.5.a have slightly different semantic for |
| * the chan_desc. But as long as multi-slot configurations |
| * are not used we seem to be fine. |
| */ |
| gsm48_lchan2chan_desc(&ass->chan_desc, lchan); |
| ass->power_command = power_command; |
| |
| /* optional: cell channel description */ |
| |
| msgb_tv_put(msg, GSM48_IE_CHANMODE_1, lchan->tch_mode); |
| |
| /* mobile allocation in case of hopping */ |
| if (lchan->ts->hopping.enabled) { |
| msgb_tlv_put(msg, GSM48_IE_MA_BEFORE, lchan->ts->hopping.ma_len, |
| lchan->ts->hopping.ma_data); |
| } |
| |
| /* in case of multi rate we need to attach a config */ |
| if (lchan->tch_mode == GSM48_CMODE_SPEECH_AMR) { |
| if (lchan->mr_conf.ver == 0) { |
| LOGP(DRR, LOGL_ERROR, "BUG: Using multirate codec " |
| "without multirate config.\n"); |
| } else { |
| u_int8_t *data = msgb_put(msg, 4); |
| data[0] = GSM48_IE_MUL_RATE_CFG; |
| data[1] = 0x2; |
| memcpy(&data[2], &lchan->mr_conf, 2); |
| } |
| } |
| |
| return gsm48_sendmsg(msg); |
| } |
| |
| /* 9.1.5 Channel mode modify: Modify the mode on the MS side */ |
| int gsm48_tx_chan_mode_modify(struct gsm_lchan *lchan, u_int8_t mode) |
| { |
| struct msgb *msg = gsm48_msgb_alloc(); |
| struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| struct gsm48_chan_mode_modify *cmm = |
| (struct gsm48_chan_mode_modify *) msgb_put(msg, sizeof(*cmm)); |
| |
| DEBUGP(DRR, "-> CHANNEL MODE MODIFY mode=0x%02x\n", mode); |
| |
| lchan->tch_mode = mode; |
| msg->lchan = lchan; |
| gh->proto_discr = GSM48_PDISC_RR; |
| gh->msg_type = GSM48_MT_RR_CHAN_MODE_MODIF; |
| |
| /* fill the channel information element, this code |
| * should probably be shared with rsl_rx_chan_rqd() */ |
| gsm48_lchan2chan_desc(&cmm->chan_desc, lchan); |
| cmm->mode = mode; |
| |
| /* in case of multi rate we need to attach a config */ |
| if (lchan->tch_mode == GSM48_CMODE_SPEECH_AMR) { |
| if (lchan->mr_conf.ver == 0) { |
| LOGP(DRR, LOGL_ERROR, "BUG: Using multirate codec " |
| "without multirate config.\n"); |
| } else { |
| u_int8_t *data = msgb_put(msg, 4); |
| data[0] = GSM48_IE_MUL_RATE_CFG; |
| data[1] = 0x2; |
| memcpy(&data[2], &lchan->mr_conf, 2); |
| } |
| } |
| |
| return gsm48_sendmsg(msg); |
| } |
| |
| int gsm48_lchan_modify(struct gsm_lchan *lchan, u_int8_t lchan_mode) |
| { |
| int rc; |
| |
| rc = gsm48_tx_chan_mode_modify(lchan, lchan_mode); |
| if (rc < 0) |
| return rc; |
| |
| return rc; |
| } |
| |
| int gsm48_rx_rr_modif_ack(struct msgb *msg) |
| { |
| int rc; |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| struct gsm48_chan_mode_modify *mod = |
| (struct gsm48_chan_mode_modify *) gh->data; |
| |
| DEBUGP(DRR, "CHANNEL MODE MODIFY ACK\n"); |
| |
| if (mod->mode != msg->lchan->tch_mode) { |
| LOGP(DRR, LOGL_ERROR, "CHANNEL MODE change failed. Wanted: %d Got: %d\n", |
| msg->lchan->tch_mode, mod->mode); |
| return -1; |
| } |
| |
| /* update the channel type */ |
| switch (mod->mode) { |
| case GSM48_CMODE_SIGN: |
| msg->lchan->rsl_cmode = RSL_CMOD_SPD_SIGN; |
| break; |
| case GSM48_CMODE_SPEECH_V1: |
| case GSM48_CMODE_SPEECH_EFR: |
| case GSM48_CMODE_SPEECH_AMR: |
| msg->lchan->rsl_cmode = RSL_CMOD_SPD_SPEECH; |
| break; |
| case GSM48_CMODE_DATA_14k5: |
| case GSM48_CMODE_DATA_12k0: |
| case GSM48_CMODE_DATA_6k0: |
| case GSM48_CMODE_DATA_3k6: |
| msg->lchan->rsl_cmode = RSL_CMOD_SPD_DATA; |
| break; |
| } |
| |
| /* We've successfully modified the MS side of the channel, |
| * now go on to modify the BTS side of the channel */ |
| rc = rsl_chan_mode_modify_req(msg->lchan); |
| |
| /* FIXME: we not only need to do this after mode modify, but |
| * also after channel activation */ |
| if (is_ipaccess_bts(msg->lchan->ts->trx->bts) && mod->mode != GSM48_CMODE_SIGN) |
| rsl_ipacc_crcx(msg->lchan); |
| return rc; |
| } |
| |
| int gsm48_parse_meas_rep(struct gsm_meas_rep *rep, struct msgb *msg) |
| { |
| struct gsm48_hdr *gh = msgb_l3(msg); |
| unsigned int payload_len = msgb_l3len(msg) - sizeof(*gh); |
| u_int8_t *data = gh->data; |
| struct gsm_bts *bts = msg->lchan->ts->trx->bts; |
| struct bitvec *nbv = &bts->si_common.neigh_list; |
| struct gsm_meas_rep_cell *mrc; |
| |
| if (gh->msg_type != GSM48_MT_RR_MEAS_REP) |
| return -EINVAL; |
| |
| if (data[0] & 0x80) |
| rep->flags |= MEAS_REP_F_BA1; |
| if (data[0] & 0x40) |
| rep->flags |= MEAS_REP_F_UL_DTX; |
| if ((data[1] & 0x40) == 0x00) |
| rep->flags |= MEAS_REP_F_DL_VALID; |
| |
| rep->dl.full.rx_lev = data[0] & 0x3f; |
| rep->dl.sub.rx_lev = data[1] & 0x3f; |
| rep->dl.full.rx_qual = (data[3] >> 4) & 0x7; |
| rep->dl.sub.rx_qual = (data[3] >> 1) & 0x7; |
| |
| rep->num_cell = ((data[3] >> 6) & 0x3) | ((data[2] & 0x01) << 2); |
| if (rep->num_cell < 1 || rep->num_cell > 6) |
| return 0; |
| |
| /* an encoding nightmare in perfection */ |
| mrc = &rep->cell[0]; |
| mrc->rxlev = data[3] & 0x3f; |
| mrc->neigh_idx = data[4] >> 3; |
| mrc->arfcn = bitvec_get_nth_set_bit(nbv, mrc->neigh_idx + 1); |
| mrc->bsic = ((data[4] & 0x07) << 3) | (data[5] >> 5); |
| if (rep->num_cell < 2) |
| return 0; |
| |
| mrc = &rep->cell[1]; |
| mrc->rxlev = ((data[5] & 0x1f) << 1) | (data[6] >> 7); |
| mrc->neigh_idx = (data[6] >> 2) & 0x1f; |
| mrc->arfcn = bitvec_get_nth_set_bit(nbv, mrc->neigh_idx + 1); |
| mrc->bsic = ((data[6] & 0x03) << 4) | (data[7] >> 4); |
| if (rep->num_cell < 3) |
| return 0; |
| |
| mrc = &rep->cell[2]; |
| mrc->rxlev = ((data[7] & 0x0f) << 2) | (data[8] >> 6); |
| mrc->neigh_idx = (data[8] >> 1) & 0x1f; |
| mrc->arfcn = bitvec_get_nth_set_bit(nbv, mrc->neigh_idx + 1); |
| mrc->bsic = ((data[8] & 0x01) << 5) | (data[9] >> 3); |
| if (rep->num_cell < 4) |
| return 0; |
| |
| mrc = &rep->cell[3]; |
| mrc->rxlev = ((data[9] & 0x07) << 3) | (data[10] >> 5); |
| mrc->neigh_idx = data[10] & 0x1f; |
| mrc->arfcn = bitvec_get_nth_set_bit(nbv, mrc->neigh_idx + 1); |
| mrc->bsic = data[11] >> 2; |
| if (rep->num_cell < 5) |
| return 0; |
| |
| mrc = &rep->cell[4]; |
| mrc->rxlev = ((data[11] & 0x03) << 4) | (data[12] >> 4); |
| mrc->neigh_idx = ((data[12] & 0xf) << 1) | (data[13] >> 7); |
| mrc->arfcn = bitvec_get_nth_set_bit(nbv, mrc->neigh_idx + 1); |
| mrc->bsic = (data[13] >> 1) & 0x3f; |
| if (rep->num_cell < 6) |
| return 0; |
| |
| mrc = &rep->cell[5]; |
| mrc->rxlev = ((data[13] & 0x01) << 5) | (data[14] >> 3); |
| mrc->neigh_idx = ((data[14] & 0x07) << 2) | (data[15] >> 6); |
| mrc->arfcn = bitvec_get_nth_set_bit(nbv, mrc->neigh_idx + 1); |
| mrc->bsic = data[15] & 0x3f; |
| |
| return 0; |
| } |
| |
| struct msgb *gsm48_create_mm_serv_rej(enum gsm48_reject_value value) |
| { |
| struct msgb *msg; |
| struct gsm48_hdr *gh; |
| |
| msg = gsm48_msgb_alloc(); |
| if (!msg) |
| return NULL; |
| |
| gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| gh->proto_discr = GSM48_PDISC_MM; |
| gh->msg_type = GSM48_MT_MM_CM_SERV_REJ; |
| gh->data[0] = value; |
| |
| return msg; |
| } |
| |
| struct msgb *gsm48_create_loc_upd_rej(uint8_t cause) |
| { |
| struct gsm48_hdr *gh; |
| struct msgb *msg; |
| |
| msg = gsm48_msgb_alloc(); |
| if (!msg) |
| return NULL; |
| |
| 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; |
| return msg; |
| } |