Holger Hans Peter Freyther | 1494a76 | 2009-08-01 07:26:59 +0200 | [diff] [blame] | 1 | /* GSM Mobile Radio Interface Layer 3 messages on the A-bis interface |
| 2 | * 3GPP TS 04.08 version 7.21.0 Release 1998 / ETSI TS 100 940 V7.21.0 |
| 3 | * utility functions |
| 4 | */ |
| 5 | |
| 6 | /* (C) 2008-2009 by Harald Welte <laforge@gnumonks.org> |
| 7 | * (C) 2008, 2009 by Holger Hans Peter Freyther <zecke@selfish.org> |
| 8 | * |
| 9 | * All Rights Reserved |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 12 | * it under the terms of the GNU Affero General Public License as published by |
| 13 | * the Free Software Foundation; either version 3 of the License, or |
Holger Hans Peter Freyther | 1494a76 | 2009-08-01 07:26:59 +0200 | [diff] [blame] | 14 | * (at your option) any later version. |
| 15 | * |
| 16 | * This program is distributed in the hope that it will be useful, |
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 19 | * GNU Affero General Public License for more details. |
Holger Hans Peter Freyther | 1494a76 | 2009-08-01 07:26:59 +0200 | [diff] [blame] | 20 | * |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 21 | * You should have received a copy of the GNU Affero General Public License |
| 22 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
Holger Hans Peter Freyther | 1494a76 | 2009-08-01 07:26:59 +0200 | [diff] [blame] | 23 | * |
| 24 | */ |
| 25 | #include <stdio.h> |
| 26 | #include <stdlib.h> |
Holger Hans Peter Freyther | adc1478 | 2009-08-21 04:57:35 +0200 | [diff] [blame] | 27 | #include <errno.h> |
Holger Hans Peter Freyther | 1494a76 | 2009-08-01 07:26:59 +0200 | [diff] [blame] | 28 | #include <netinet/in.h> |
| 29 | |
Pablo Neira Ayuso | 136f453 | 2011-03-22 16:47:59 +0100 | [diff] [blame] | 30 | #include <osmocom/core/msgb.h> |
| 31 | #include <osmocom/gsm/gsm48.h> |
Holger Hans Peter Freyther | e2fee35 | 2010-12-22 12:32:56 +0100 | [diff] [blame] | 32 | |
Neels Hofmeyr | c016479 | 2017-09-04 15:15:32 +0200 | [diff] [blame] | 33 | #include <osmocom/bsc/abis_rsl.h> |
| 34 | #include <osmocom/bsc/debug.h> |
Neels Hofmeyr | c016479 | 2017-09-04 15:15:32 +0200 | [diff] [blame] | 35 | #include <osmocom/bsc/paging.h> |
| 36 | #include <osmocom/bsc/signal.h> |
| 37 | #include <osmocom/bsc/bsc_api.h> |
| 38 | #include <osmocom/bsc/gsm_04_08_utils.h> |
Holger Hans Peter Freyther | 1494a76 | 2009-08-01 07:26:59 +0200 | [diff] [blame] | 39 | |
Holger Hans Peter Freyther | 1494a76 | 2009-08-01 07:26:59 +0200 | [diff] [blame] | 40 | /* should ip.access BTS use direct RTP streams between each other (1), |
| 41 | * or should OpenBSC always act as RTP relay/proxy in between (0) ? */ |
| 42 | int ipacc_rtp_direct = 1; |
| 43 | |
Holger Hans Peter Freyther | 9c137a7 | 2010-06-15 13:57:40 +0800 | [diff] [blame] | 44 | static int gsm48_sendmsg(struct msgb *msg) |
Holger Hans Peter Freyther | 1494a76 | 2009-08-01 07:26:59 +0200 | [diff] [blame] | 45 | { |
Holger Hans Peter Freyther | 9c137a7 | 2010-06-15 13:57:40 +0800 | [diff] [blame] | 46 | if (msg->lchan) |
Pablo Neira Ayuso | 7abecfc | 2011-08-17 22:43:54 +0200 | [diff] [blame] | 47 | msg->dst = msg->lchan->ts->trx->rsl_link; |
Holger Hans Peter Freyther | 1494a76 | 2009-08-01 07:26:59 +0200 | [diff] [blame] | 48 | |
Holger Hans Peter Freyther | 1494a76 | 2009-08-01 07:26:59 +0200 | [diff] [blame] | 49 | msg->l3h = msg->data; |
Holger Hans Peter Freyther | 1494a76 | 2009-08-01 07:26:59 +0200 | [diff] [blame] | 50 | return rsl_data_request(msg, 0); |
| 51 | } |
| 52 | |
Holger Hans Peter Freyther | 1494a76 | 2009-08-01 07:26:59 +0200 | [diff] [blame] | 53 | /* Section 9.1.8 / Table 9.9 */ |
| 54 | struct chreq { |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 55 | uint8_t val; |
| 56 | uint8_t mask; |
Holger Hans Peter Freyther | 1494a76 | 2009-08-01 07:26:59 +0200 | [diff] [blame] | 57 | enum chreq_type type; |
| 58 | }; |
| 59 | |
| 60 | /* If SYSTEM INFORMATION TYPE 4 NECI bit == 1 */ |
| 61 | static const struct chreq chreq_type_neci1[] = { |
| 62 | { 0xa0, 0xe0, CHREQ_T_EMERG_CALL }, |
| 63 | { 0xc0, 0xe0, CHREQ_T_CALL_REEST_TCH_F }, |
| 64 | { 0x68, 0xfc, CHREQ_T_CALL_REEST_TCH_H }, |
| 65 | { 0x6c, 0xfc, CHREQ_T_CALL_REEST_TCH_H_DBL }, |
Sylvain Munaut | cfcf7e8 | 2010-12-27 00:59:23 +0100 | [diff] [blame] | 66 | { 0xe0, 0xe0, CHREQ_T_TCH_F }, |
Holger Hans Peter Freyther | 1494a76 | 2009-08-01 07:26:59 +0200 | [diff] [blame] | 67 | { 0x40, 0xf0, CHREQ_T_VOICE_CALL_TCH_H }, |
| 68 | { 0x50, 0xf0, CHREQ_T_DATA_CALL_TCH_H }, |
| 69 | { 0x00, 0xf0, CHREQ_T_LOCATION_UPD }, |
| 70 | { 0x10, 0xf0, CHREQ_T_SDCCH }, |
Holger Hans Peter Freyther | 135a7c6 | 2009-11-17 16:46:46 +0100 | [diff] [blame] | 71 | { 0x80, 0xe0, CHREQ_T_PAG_R_ANY_NECI1 }, |
Holger Hans Peter Freyther | 1494a76 | 2009-08-01 07:26:59 +0200 | [diff] [blame] | 72 | { 0x20, 0xf0, CHREQ_T_PAG_R_TCH_F }, |
| 73 | { 0x30, 0xf0, CHREQ_T_PAG_R_TCH_FH }, |
Holger Hans Peter Freyther | d61654c | 2009-11-21 20:20:43 +0100 | [diff] [blame] | 74 | { 0x67, 0xff, CHREQ_T_LMU }, |
| 75 | { 0x60, 0xf9, CHREQ_T_RESERVED_SDCCH }, |
| 76 | { 0x61, 0xfb, CHREQ_T_RESERVED_SDCCH }, |
Alexander Couzens | 1136811 | 2016-11-28 23:26:50 +0100 | [diff] [blame] | 77 | { 0x63, 0xff, CHREQ_T_RESERVED_SDCCH }, |
| 78 | { 0x70, 0xf8, CHREQ_T_PDCH_TWO_PHASE }, |
| 79 | { 0x78, 0xfc, CHREQ_T_PDCH_ONE_PHASE }, |
| 80 | { 0x78, 0xfa, CHREQ_T_PDCH_ONE_PHASE }, |
| 81 | { 0x78, 0xf9, CHREQ_T_PDCH_ONE_PHASE }, |
Holger Hans Peter Freyther | d61654c | 2009-11-21 20:20:43 +0100 | [diff] [blame] | 82 | { 0x7f, 0xff, CHREQ_T_RESERVED_IGNORE }, |
Holger Hans Peter Freyther | 1494a76 | 2009-08-01 07:26:59 +0200 | [diff] [blame] | 83 | }; |
| 84 | |
| 85 | /* If SYSTEM INFORMATION TYPE 4 NECI bit == 0 */ |
| 86 | static const struct chreq chreq_type_neci0[] = { |
| 87 | { 0xa0, 0xe0, CHREQ_T_EMERG_CALL }, |
| 88 | { 0xc0, 0xe0, CHREQ_T_CALL_REEST_TCH_H }, |
| 89 | { 0xe0, 0xe0, CHREQ_T_TCH_F }, |
| 90 | { 0x50, 0xf0, CHREQ_T_DATA_CALL_TCH_H }, |
| 91 | { 0x00, 0xe0, CHREQ_T_LOCATION_UPD }, |
Holger Hans Peter Freyther | 135a7c6 | 2009-11-17 16:46:46 +0100 | [diff] [blame] | 92 | { 0x80, 0xe0, CHREQ_T_PAG_R_ANY_NECI0 }, |
Holger Hans Peter Freyther | 1494a76 | 2009-08-01 07:26:59 +0200 | [diff] [blame] | 93 | { 0x20, 0xf0, CHREQ_T_PAG_R_TCH_F }, |
| 94 | { 0x30, 0xf0, CHREQ_T_PAG_R_TCH_FH }, |
Holger Hans Peter Freyther | d61654c | 2009-11-21 20:20:43 +0100 | [diff] [blame] | 95 | { 0x67, 0xff, CHREQ_T_LMU }, |
| 96 | { 0x60, 0xf9, CHREQ_T_RESERVED_SDCCH }, |
| 97 | { 0x61, 0xfb, CHREQ_T_RESERVED_SDCCH }, |
Alexander Couzens | 1136811 | 2016-11-28 23:26:50 +0100 | [diff] [blame] | 98 | { 0x63, 0xff, CHREQ_T_RESERVED_SDCCH }, |
| 99 | { 0x70, 0xf8, CHREQ_T_PDCH_TWO_PHASE }, |
| 100 | { 0x78, 0xfc, CHREQ_T_PDCH_ONE_PHASE }, |
| 101 | { 0x78, 0xfa, CHREQ_T_PDCH_ONE_PHASE }, |
| 102 | { 0x78, 0xf9, CHREQ_T_PDCH_ONE_PHASE }, |
Holger Hans Peter Freyther | d61654c | 2009-11-21 20:20:43 +0100 | [diff] [blame] | 103 | { 0x7f, 0xff, CHREQ_T_RESERVED_IGNORE }, |
Holger Hans Peter Freyther | 1494a76 | 2009-08-01 07:26:59 +0200 | [diff] [blame] | 104 | }; |
| 105 | |
| 106 | static const enum gsm_chan_t ctype_by_chreq[] = { |
| 107 | [CHREQ_T_EMERG_CALL] = GSM_LCHAN_TCH_F, |
| 108 | [CHREQ_T_CALL_REEST_TCH_F] = GSM_LCHAN_TCH_F, |
| 109 | [CHREQ_T_CALL_REEST_TCH_H] = GSM_LCHAN_TCH_H, |
| 110 | [CHREQ_T_CALL_REEST_TCH_H_DBL] = GSM_LCHAN_TCH_H, |
| 111 | [CHREQ_T_SDCCH] = GSM_LCHAN_SDCCH, |
| 112 | [CHREQ_T_TCH_F] = GSM_LCHAN_TCH_F, |
| 113 | [CHREQ_T_VOICE_CALL_TCH_H] = GSM_LCHAN_TCH_H, |
| 114 | [CHREQ_T_DATA_CALL_TCH_H] = GSM_LCHAN_TCH_H, |
| 115 | [CHREQ_T_LOCATION_UPD] = GSM_LCHAN_SDCCH, |
Holger Hans Peter Freyther | 135a7c6 | 2009-11-17 16:46:46 +0100 | [diff] [blame] | 116 | [CHREQ_T_PAG_R_ANY_NECI1] = GSM_LCHAN_SDCCH, |
| 117 | [CHREQ_T_PAG_R_ANY_NECI0] = GSM_LCHAN_SDCCH, |
Holger Hans Peter Freyther | 1494a76 | 2009-08-01 07:26:59 +0200 | [diff] [blame] | 118 | [CHREQ_T_PAG_R_TCH_F] = GSM_LCHAN_TCH_F, |
Andreas Eversberg | c8a7823 | 2013-03-31 11:44:34 +0200 | [diff] [blame] | 119 | [CHREQ_T_PAG_R_TCH_FH] = GSM_LCHAN_TCH_H, |
Holger Hans Peter Freyther | d61654c | 2009-11-21 20:20:43 +0100 | [diff] [blame] | 120 | [CHREQ_T_LMU] = GSM_LCHAN_SDCCH, |
| 121 | [CHREQ_T_RESERVED_SDCCH] = GSM_LCHAN_SDCCH, |
Alexander Couzens | 1136811 | 2016-11-28 23:26:50 +0100 | [diff] [blame] | 122 | [CHREQ_T_PDCH_ONE_PHASE] = GSM_LCHAN_PDTCH, |
| 123 | [CHREQ_T_PDCH_TWO_PHASE] = GSM_LCHAN_PDTCH, |
Holger Hans Peter Freyther | d61654c | 2009-11-21 20:20:43 +0100 | [diff] [blame] | 124 | [CHREQ_T_RESERVED_IGNORE] = GSM_LCHAN_UNKNOWN, |
Holger Hans Peter Freyther | 1494a76 | 2009-08-01 07:26:59 +0200 | [diff] [blame] | 125 | }; |
| 126 | |
| 127 | static const enum gsm_chreq_reason_t reason_by_chreq[] = { |
| 128 | [CHREQ_T_EMERG_CALL] = GSM_CHREQ_REASON_EMERG, |
| 129 | [CHREQ_T_CALL_REEST_TCH_F] = GSM_CHREQ_REASON_CALL, |
| 130 | [CHREQ_T_CALL_REEST_TCH_H] = GSM_CHREQ_REASON_CALL, |
| 131 | [CHREQ_T_CALL_REEST_TCH_H_DBL] = GSM_CHREQ_REASON_CALL, |
| 132 | [CHREQ_T_SDCCH] = GSM_CHREQ_REASON_OTHER, |
| 133 | [CHREQ_T_TCH_F] = GSM_CHREQ_REASON_OTHER, |
Harald Welte | 9385c11 | 2009-12-12 20:57:52 +0100 | [diff] [blame] | 134 | [CHREQ_T_VOICE_CALL_TCH_H] = GSM_CHREQ_REASON_CALL, |
Holger Hans Peter Freyther | 1494a76 | 2009-08-01 07:26:59 +0200 | [diff] [blame] | 135 | [CHREQ_T_DATA_CALL_TCH_H] = GSM_CHREQ_REASON_OTHER, |
| 136 | [CHREQ_T_LOCATION_UPD] = GSM_CHREQ_REASON_LOCATION_UPD, |
Holger Hans Peter Freyther | 135a7c6 | 2009-11-17 16:46:46 +0100 | [diff] [blame] | 137 | [CHREQ_T_PAG_R_ANY_NECI1] = GSM_CHREQ_REASON_PAG, |
| 138 | [CHREQ_T_PAG_R_ANY_NECI0] = GSM_CHREQ_REASON_PAG, |
Holger Hans Peter Freyther | 1494a76 | 2009-08-01 07:26:59 +0200 | [diff] [blame] | 139 | [CHREQ_T_PAG_R_TCH_F] = GSM_CHREQ_REASON_PAG, |
| 140 | [CHREQ_T_PAG_R_TCH_FH] = GSM_CHREQ_REASON_PAG, |
Holger Hans Peter Freyther | d61654c | 2009-11-21 20:20:43 +0100 | [diff] [blame] | 141 | [CHREQ_T_LMU] = GSM_CHREQ_REASON_OTHER, |
Alexander Couzens | 1136811 | 2016-11-28 23:26:50 +0100 | [diff] [blame] | 142 | [CHREQ_T_PDCH_ONE_PHASE] = GSM_CHREQ_REASON_PDCH, |
| 143 | [CHREQ_T_PDCH_TWO_PHASE] = GSM_CHREQ_REASON_PDCH, |
Holger Hans Peter Freyther | d61654c | 2009-11-21 20:20:43 +0100 | [diff] [blame] | 144 | [CHREQ_T_RESERVED_SDCCH] = GSM_CHREQ_REASON_OTHER, |
| 145 | [CHREQ_T_RESERVED_IGNORE] = GSM_CHREQ_REASON_OTHER, |
Holger Hans Peter Freyther | 1494a76 | 2009-08-01 07:26:59 +0200 | [diff] [blame] | 146 | }; |
| 147 | |
Holger Hans Peter Freyther | 7889107 | 2010-09-06 09:36:02 +0800 | [diff] [blame] | 148 | /* verify that the two tables match */ |
Pablo Neira Ayuso | c0d17f2 | 2011-05-07 12:12:48 +0200 | [diff] [blame] | 149 | osmo_static_assert(sizeof(ctype_by_chreq) == |
Holger Hans Peter Freyther | 7889107 | 2010-09-06 09:36:02 +0800 | [diff] [blame] | 150 | sizeof(((struct gsm_network *) NULL)->ctype_by_chreq), assert_size); |
| 151 | |
| 152 | /* |
| 153 | * Update channel types for request based on policy. E.g. in the |
| 154 | * case of a TCH/H network/bsc use TCH/H for the emergency calls, |
| 155 | * for early assignment assign a SDCCH and some other options. |
| 156 | */ |
| 157 | void gsm_net_update_ctype(struct gsm_network *network) |
| 158 | { |
| 159 | /* copy over the data */ |
| 160 | memcpy(network->ctype_by_chreq, ctype_by_chreq, sizeof(ctype_by_chreq)); |
| 161 | |
| 162 | /* |
| 163 | * Use TCH/H for emergency calls when this cell allows TCH/H. Maybe it |
| 164 | * is better to iterate over the BTS/TRX and check if no TCH/F is available |
| 165 | * and then set it to TCH/H. |
| 166 | */ |
| 167 | if (network->neci) |
| 168 | network->ctype_by_chreq[CHREQ_T_EMERG_CALL] = GSM_LCHAN_TCH_H; |
Holger Hans Peter Freyther | 76fc4a3 | 2010-09-06 09:41:50 +0800 | [diff] [blame] | 169 | |
| 170 | if (network->pag_any_tch) { |
| 171 | if (network->neci) { |
| 172 | network->ctype_by_chreq[CHREQ_T_PAG_R_ANY_NECI0] = GSM_LCHAN_TCH_H; |
| 173 | network->ctype_by_chreq[CHREQ_T_PAG_R_ANY_NECI1] = GSM_LCHAN_TCH_H; |
| 174 | } else { |
| 175 | network->ctype_by_chreq[CHREQ_T_PAG_R_ANY_NECI0] = GSM_LCHAN_TCH_F; |
| 176 | network->ctype_by_chreq[CHREQ_T_PAG_R_ANY_NECI1] = GSM_LCHAN_TCH_F; |
| 177 | } |
| 178 | } |
Holger Hans Peter Freyther | 7889107 | 2010-09-06 09:36:02 +0800 | [diff] [blame] | 179 | } |
| 180 | |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 181 | enum gsm_chan_t get_ctype_by_chreq(struct gsm_network *network, uint8_t ra) |
Holger Hans Peter Freyther | 1494a76 | 2009-08-01 07:26:59 +0200 | [diff] [blame] | 182 | { |
| 183 | int i; |
Holger Hans Peter Freyther | 843b44d | 2009-11-17 16:38:25 +0100 | [diff] [blame] | 184 | int length; |
| 185 | const struct chreq *chreq; |
Holger Hans Peter Freyther | 1494a76 | 2009-08-01 07:26:59 +0200 | [diff] [blame] | 186 | |
Holger Hans Peter Freyther | 7889107 | 2010-09-06 09:36:02 +0800 | [diff] [blame] | 187 | if (network->neci) { |
Holger Hans Peter Freyther | 843b44d | 2009-11-17 16:38:25 +0100 | [diff] [blame] | 188 | chreq = chreq_type_neci1; |
| 189 | length = ARRAY_SIZE(chreq_type_neci1); |
| 190 | } else { |
| 191 | chreq = chreq_type_neci0; |
| 192 | length = ARRAY_SIZE(chreq_type_neci0); |
| 193 | } |
| 194 | |
| 195 | |
| 196 | for (i = 0; i < length; i++) { |
| 197 | const struct chreq *chr = &chreq[i]; |
Holger Hans Peter Freyther | 1494a76 | 2009-08-01 07:26:59 +0200 | [diff] [blame] | 198 | if ((ra & chr->mask) == chr->val) |
Holger Hans Peter Freyther | 7889107 | 2010-09-06 09:36:02 +0800 | [diff] [blame] | 199 | return network->ctype_by_chreq[chr->type]; |
Holger Hans Peter Freyther | 1494a76 | 2009-08-01 07:26:59 +0200 | [diff] [blame] | 200 | } |
Harald Welte | 50720e7 | 2009-12-24 11:50:20 +0100 | [diff] [blame] | 201 | LOGP(DRR, LOGL_ERROR, "Unknown CHANNEL REQUEST RQD 0x%02x\n", ra); |
Holger Hans Peter Freyther | 1494a76 | 2009-08-01 07:26:59 +0200 | [diff] [blame] | 202 | return GSM_LCHAN_SDCCH; |
| 203 | } |
| 204 | |
Harald Welte | b226864 | 2011-07-23 10:53:30 +0200 | [diff] [blame] | 205 | int get_reason_by_chreq(uint8_t ra, int neci) |
Holger Hans Peter Freyther | 1494a76 | 2009-08-01 07:26:59 +0200 | [diff] [blame] | 206 | { |
| 207 | int i; |
Holger Hans Peter Freyther | 843b44d | 2009-11-17 16:38:25 +0100 | [diff] [blame] | 208 | int length; |
| 209 | const struct chreq *chreq; |
Holger Hans Peter Freyther | 1494a76 | 2009-08-01 07:26:59 +0200 | [diff] [blame] | 210 | |
Holger Hans Peter Freyther | 843b44d | 2009-11-17 16:38:25 +0100 | [diff] [blame] | 211 | if (neci) { |
| 212 | chreq = chreq_type_neci1; |
| 213 | length = ARRAY_SIZE(chreq_type_neci1); |
| 214 | } else { |
| 215 | chreq = chreq_type_neci0; |
| 216 | length = ARRAY_SIZE(chreq_type_neci0); |
| 217 | } |
| 218 | |
| 219 | for (i = 0; i < length; i++) { |
| 220 | const struct chreq *chr = &chreq[i]; |
Holger Hans Peter Freyther | 1494a76 | 2009-08-01 07:26:59 +0200 | [diff] [blame] | 221 | if ((ra & chr->mask) == chr->val) |
| 222 | return reason_by_chreq[chr->type]; |
| 223 | } |
Harald Welte | 50720e7 | 2009-12-24 11:50:20 +0100 | [diff] [blame] | 224 | LOGP(DRR, LOGL_ERROR, "Unknown CHANNEL REQUEST REASON 0x%02x\n", ra); |
Holger Hans Peter Freyther | 1494a76 | 2009-08-01 07:26:59 +0200 | [diff] [blame] | 225 | return GSM_CHREQ_REASON_OTHER; |
| 226 | } |
| 227 | |
Holger Hans Peter Freyther | 11cb7a9 | 2015-08-20 19:32:46 +0200 | [diff] [blame] | 228 | static void mr_config_for_ms(struct gsm_lchan *lchan, struct msgb *msg) |
| 229 | { |
| 230 | if (lchan->tch_mode == GSM48_CMODE_SPEECH_AMR) |
| 231 | msgb_tlv_put(msg, GSM48_IE_MUL_RATE_CFG, lchan->mr_ms_lv[0], |
| 232 | lchan->mr_ms_lv + 1); |
| 233 | } |
| 234 | |
Holger Hans Peter Freyther | 1494a76 | 2009-08-01 07:26:59 +0200 | [diff] [blame] | 235 | /* 7.1.7 and 9.1.7: RR CHANnel RELease */ |
| 236 | int gsm48_send_rr_release(struct gsm_lchan *lchan) |
| 237 | { |
Holger Hans Peter Freyther | 8239e06 | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 238 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 RR REL"); |
Holger Hans Peter Freyther | 1494a76 | 2009-08-01 07:26:59 +0200 | [diff] [blame] | 239 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 240 | uint8_t *cause; |
Holger Hans Peter Freyther | 1494a76 | 2009-08-01 07:26:59 +0200 | [diff] [blame] | 241 | |
| 242 | msg->lchan = lchan; |
| 243 | gh->proto_discr = GSM48_PDISC_RR; |
| 244 | gh->msg_type = GSM48_MT_RR_CHAN_REL; |
| 245 | |
| 246 | cause = msgb_put(msg, 1); |
| 247 | cause[0] = GSM48_RR_CAUSE_NORMAL; |
| 248 | |
| 249 | DEBUGP(DRR, "Sending Channel Release: Chan: Number: %d Type: %d\n", |
| 250 | lchan->nr, lchan->type); |
| 251 | |
| 252 | /* Send actual release request to MS */ |
Holger Hans Peter Freyther | b348939 | 2011-12-28 16:21:05 +0100 | [diff] [blame] | 253 | return gsm48_sendmsg(msg); |
Holger Hans Peter Freyther | 1494a76 | 2009-08-01 07:26:59 +0200 | [diff] [blame] | 254 | } |
| 255 | |
Holger Hans Peter Freyther | adc1478 | 2009-08-21 04:57:35 +0200 | [diff] [blame] | 256 | int send_siemens_mrpci(struct gsm_lchan *lchan, |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 257 | uint8_t *classmark2_lv) |
Holger Hans Peter Freyther | adc1478 | 2009-08-21 04:57:35 +0200 | [diff] [blame] | 258 | { |
| 259 | struct rsl_mrpci mrpci; |
| 260 | |
| 261 | if (classmark2_lv[0] < 2) |
| 262 | return -EINVAL; |
| 263 | |
| 264 | mrpci.power_class = classmark2_lv[1] & 0x7; |
| 265 | mrpci.vgcs_capable = classmark2_lv[2] & (1 << 1); |
| 266 | mrpci.vbs_capable = classmark2_lv[2] & (1 <<2); |
| 267 | mrpci.gsm_phase = (classmark2_lv[1]) >> 5 & 0x3; |
| 268 | |
| 269 | return rsl_siemens_mrpci(lchan, &mrpci); |
| 270 | } |
| 271 | |
Holger Hans Peter Freyther | ea4088a | 2009-10-05 13:25:06 +0200 | [diff] [blame] | 272 | /* Chapter 9.1.9: Ciphering Mode Command */ |
Holger Hans Peter Freyther | ca6bc1d | 2009-10-05 14:00:14 +0200 | [diff] [blame] | 273 | int gsm48_send_rr_ciph_mode(struct gsm_lchan *lchan, int want_imeisv) |
Holger Hans Peter Freyther | ea4088a | 2009-10-05 13:25:06 +0200 | [diff] [blame] | 274 | { |
Holger Hans Peter Freyther | 8239e06 | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 275 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 CIPH"); |
Holger Hans Peter Freyther | ea4088a | 2009-10-05 13:25:06 +0200 | [diff] [blame] | 276 | struct gsm48_hdr *gh; |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 277 | uint8_t ciph_mod_set; |
Holger Hans Peter Freyther | ea4088a | 2009-10-05 13:25:06 +0200 | [diff] [blame] | 278 | |
| 279 | msg->lchan = lchan; |
| 280 | |
| 281 | DEBUGP(DRR, "TX CIPHERING MODE CMD\n"); |
| 282 | |
| 283 | if (lchan->encr.alg_id <= RSL_ENC_ALG_A5(0)) |
| 284 | ciph_mod_set = 0; |
| 285 | else |
| 286 | ciph_mod_set = (lchan->encr.alg_id-2)<<1 | 1; |
| 287 | |
| 288 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 289 | gh->proto_discr = GSM48_PDISC_RR; |
| 290 | gh->msg_type = GSM48_MT_RR_CIPH_M_CMD; |
Holger Hans Peter Freyther | ca6bc1d | 2009-10-05 14:00:14 +0200 | [diff] [blame] | 291 | gh->data[0] = (want_imeisv & 0x1) << 4 | (ciph_mod_set & 0xf); |
Holger Hans Peter Freyther | ea4088a | 2009-10-05 13:25:06 +0200 | [diff] [blame] | 292 | |
| 293 | return rsl_encryption_cmd(msg); |
| 294 | } |
| 295 | |
Harald Welte | 8c83af6 | 2009-11-29 20:02:53 +0100 | [diff] [blame] | 296 | static void gsm48_cell_desc(struct gsm48_cell_desc *cd, |
| 297 | const struct gsm_bts *bts) |
| 298 | { |
| 299 | cd->ncc = (bts->bsic >> 3 & 0x7); |
| 300 | cd->bcc = (bts->bsic & 0x7); |
| 301 | cd->arfcn_hi = bts->c0->arfcn >> 8; |
| 302 | cd->arfcn_lo = bts->c0->arfcn & 0xff; |
| 303 | } |
| 304 | |
Harald Welte | a39b0f2 | 2010-06-14 22:26:10 +0200 | [diff] [blame] | 305 | void gsm48_lchan2chan_desc(struct gsm48_chan_desc *cd, |
| 306 | const struct gsm_lchan *lchan) |
Harald Welte | 8c83af6 | 2009-11-29 20:02:53 +0100 | [diff] [blame] | 307 | { |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 308 | uint16_t arfcn = lchan->ts->trx->arfcn & 0x3ff; |
Harald Welte | 8c83af6 | 2009-11-29 20:02:53 +0100 | [diff] [blame] | 309 | |
Harald Welte | f6093a4 | 2011-06-25 10:02:33 +0200 | [diff] [blame] | 310 | cd->chan_nr = gsm_lchan2chan_nr(lchan); |
Harald Welte | a39b0f2 | 2010-06-14 22:26:10 +0200 | [diff] [blame] | 311 | if (!lchan->ts->hopping.enabled) { |
Harald Welte | 1fe2412 | 2014-01-19 17:18:21 +0100 | [diff] [blame] | 312 | cd->h0.tsc = gsm_ts_tsc(lchan->ts); |
Harald Welte | a39b0f2 | 2010-06-14 22:26:10 +0200 | [diff] [blame] | 313 | cd->h0.h = 0; |
| 314 | cd->h0.arfcn_high = arfcn >> 8; |
| 315 | cd->h0.arfcn_low = arfcn & 0xff; |
| 316 | } else { |
Harald Welte | 1fe2412 | 2014-01-19 17:18:21 +0100 | [diff] [blame] | 317 | cd->h1.tsc = gsm_ts_tsc(lchan->ts); |
Harald Welte | a39b0f2 | 2010-06-14 22:26:10 +0200 | [diff] [blame] | 318 | cd->h1.h = 1; |
| 319 | cd->h1.maio_high = lchan->ts->hopping.maio >> 2; |
| 320 | cd->h1.maio_low = lchan->ts->hopping.maio & 0x03; |
| 321 | cd->h1.hsn = lchan->ts->hopping.hsn; |
| 322 | } |
Harald Welte | 8c83af6 | 2009-11-29 20:02:53 +0100 | [diff] [blame] | 323 | } |
| 324 | |
Harald Welte | 0de69a2 | 2017-05-27 13:18:50 +0200 | [diff] [blame] | 325 | /*! \brief Encode a TS 04.08 multirate config LV according to 10.5.2.21aa |
| 326 | * \param[out] lv caller-allocated buffer of 7 bytes. First octet is IS length |
| 327 | * \param[in] mr multi-rate configuration to encode |
| 328 | * \param[in] modes array describing the AMR modes |
| 329 | * \returns 0 on success */ |
| 330 | int gsm48_multirate_config(uint8_t *lv, const struct amr_multirate_conf *mr, const struct amr_mode *modes) |
Andreas Eversberg | 7326652 | 2014-01-19 11:47:44 +0100 | [diff] [blame] | 331 | { |
| 332 | int num = 0, i; |
| 333 | |
| 334 | for (i = 0; i < 8; i++) { |
| 335 | if (((mr->gsm48_ie[1] >> i) & 1)) |
| 336 | num++; |
| 337 | } |
| 338 | if (num > 4) { |
| 339 | LOGP(DRR, LOGL_ERROR, "BUG: Using multirate codec with too " |
| 340 | "many modes in config.\n"); |
| 341 | num = 4; |
| 342 | } |
| 343 | if (num < 1) { |
| 344 | LOGP(DRR, LOGL_ERROR, "BUG: Using multirate codec with no " |
| 345 | "mode in config.\n"); |
| 346 | num = 1; |
| 347 | } |
| 348 | |
| 349 | lv[0] = (num == 1) ? 2 : (num + 2); |
| 350 | memcpy(lv + 1, mr->gsm48_ie, 2); |
| 351 | if (num == 1) |
| 352 | return 0; |
Holger Hans Peter Freyther | 615ed46 | 2015-09-24 11:30:58 +0200 | [diff] [blame] | 353 | |
| 354 | lv[3] = modes[0].threshold & 0x3f; |
| 355 | lv[4] = modes[0].hysteresis << 4; |
| 356 | if (num == 2) |
| 357 | return 0; |
| 358 | lv[4] |= (modes[1].threshold & 0x3f) >> 2; |
| 359 | lv[5] = modes[1].threshold << 6; |
| 360 | lv[5] |= (modes[1].hysteresis & 0x0f) << 2; |
| 361 | if (num == 3) |
| 362 | return 0; |
| 363 | lv[5] |= (modes[2].threshold & 0x3f) >> 4; |
| 364 | lv[6] = modes[2].threshold << 4; |
| 365 | lv[6] |= modes[2].hysteresis & 0x0f; |
Andreas Eversberg | 7326652 | 2014-01-19 11:47:44 +0100 | [diff] [blame] | 366 | |
| 367 | return 0; |
| 368 | } |
| 369 | |
Harald Welte | 29aca17 | 2010-06-15 16:45:51 +0200 | [diff] [blame] | 370 | #define GSM48_HOCMD_CCHDESC_LEN 16 |
| 371 | |
Harald Welte | 8c83af6 | 2009-11-29 20:02:53 +0100 | [diff] [blame] | 372 | /* Chapter 9.1.15: Handover Command */ |
Harald Welte | 7a7a0d5 | 2009-12-17 00:25:18 +0100 | [diff] [blame] | 373 | int gsm48_send_ho_cmd(struct gsm_lchan *old_lchan, struct gsm_lchan *new_lchan, |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 374 | uint8_t power_command, uint8_t ho_ref) |
Harald Welte | 8c83af6 | 2009-11-29 20:02:53 +0100 | [diff] [blame] | 375 | { |
Holger Hans Peter Freyther | 8239e06 | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 376 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 HO CMD"); |
Harald Welte | 8c83af6 | 2009-11-29 20:02:53 +0100 | [diff] [blame] | 377 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 378 | struct gsm48_ho_cmd *ho = |
| 379 | (struct gsm48_ho_cmd *) msgb_put(msg, sizeof(*ho)); |
Harald Welte | 8c83af6 | 2009-11-29 20:02:53 +0100 | [diff] [blame] | 380 | |
| 381 | msg->lchan = old_lchan; |
Harald Welte | 7a7a0d5 | 2009-12-17 00:25:18 +0100 | [diff] [blame] | 382 | gh->proto_discr = GSM48_PDISC_RR; |
| 383 | gh->msg_type = GSM48_MT_RR_HANDO_CMD; |
Harald Welte | 8c83af6 | 2009-11-29 20:02:53 +0100 | [diff] [blame] | 384 | |
| 385 | /* mandatory bits */ |
| 386 | gsm48_cell_desc(&ho->cell_desc, new_lchan->ts->trx->bts); |
Harald Welte | a39b0f2 | 2010-06-14 22:26:10 +0200 | [diff] [blame] | 387 | gsm48_lchan2chan_desc(&ho->chan_desc, new_lchan); |
Harald Welte | 7a7a0d5 | 2009-12-17 00:25:18 +0100 | [diff] [blame] | 388 | ho->ho_ref = ho_ref; |
Harald Welte | 8c83af6 | 2009-11-29 20:02:53 +0100 | [diff] [blame] | 389 | ho->power_command = power_command; |
| 390 | |
Harald Welte | 29aca17 | 2010-06-15 16:45:51 +0200 | [diff] [blame] | 391 | if (new_lchan->ts->hopping.enabled) { |
| 392 | struct gsm_bts *bts = new_lchan->ts->trx->bts; |
| 393 | struct gsm48_system_information_type_1 *si1; |
| 394 | uint8_t *cur; |
| 395 | |
| 396 | si1 = GSM_BTS_SI(bts, SYSINFO_TYPE_1); |
| 397 | /* Copy the Cell Chan Desc (ARFCNS in this cell) */ |
| 398 | msgb_put_u8(msg, GSM48_IE_CELL_CH_DESC); |
| 399 | cur = msgb_put(msg, GSM48_HOCMD_CCHDESC_LEN); |
| 400 | memcpy(cur, si1->cell_channel_description, |
| 401 | GSM48_HOCMD_CCHDESC_LEN); |
| 402 | /* Copy the Mobile Allocation */ |
| 403 | msgb_tlv_put(msg, GSM48_IE_MA_BEFORE, |
| 404 | new_lchan->ts->hopping.ma_len, |
| 405 | new_lchan->ts->hopping.ma_data); |
| 406 | } |
Harald Welte | 8c83af6 | 2009-11-29 20:02:53 +0100 | [diff] [blame] | 407 | /* FIXME: optional bits for type of synchronization? */ |
| 408 | |
Andreas Eversberg | a49d7b2 | 2013-05-30 09:57:55 +0200 | [diff] [blame] | 409 | msgb_tv_put(msg, GSM48_IE_CHANMODE_1, new_lchan->tch_mode); |
| 410 | |
| 411 | /* in case of multi rate we need to attach a config */ |
| 412 | if (new_lchan->tch_mode == GSM48_CMODE_SPEECH_AMR) |
| 413 | msgb_tlv_put(msg, GSM48_IE_MUL_RATE_CFG, new_lchan->mr_ms_lv[0], |
| 414 | new_lchan->mr_ms_lv + 1); |
| 415 | |
Holger Hans Peter Freyther | 9c137a7 | 2010-06-15 13:57:40 +0800 | [diff] [blame] | 416 | return gsm48_sendmsg(msg); |
Harald Welte | 8c83af6 | 2009-11-29 20:02:53 +0100 | [diff] [blame] | 417 | } |
| 418 | |
Holger Hans Peter Freyther | e81a610 | 2009-10-22 11:47:45 +0200 | [diff] [blame] | 419 | /* Chapter 9.1.2: Assignment Command */ |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 420 | int gsm48_send_rr_ass_cmd(struct gsm_lchan *dest_lchan, struct gsm_lchan *lchan, uint8_t power_command) |
Holger Hans Peter Freyther | e81a610 | 2009-10-22 11:47:45 +0200 | [diff] [blame] | 421 | { |
Holger Hans Peter Freyther | 8239e06 | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 422 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 ASS CMD"); |
Holger Hans Peter Freyther | e81a610 | 2009-10-22 11:47:45 +0200 | [diff] [blame] | 423 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 424 | struct gsm48_ass_cmd *ass = |
| 425 | (struct gsm48_ass_cmd *) msgb_put(msg, sizeof(*ass)); |
Holger Hans Peter Freyther | e81a610 | 2009-10-22 11:47:45 +0200 | [diff] [blame] | 426 | |
| 427 | DEBUGP(DRR, "-> ASSIGNMENT COMMAND tch_mode=0x%02x\n", lchan->tch_mode); |
| 428 | |
Holger Hans Peter Freyther | 550197f | 2010-01-28 09:43:49 +0100 | [diff] [blame] | 429 | msg->lchan = dest_lchan; |
Holger Hans Peter Freyther | e81a610 | 2009-10-22 11:47:45 +0200 | [diff] [blame] | 430 | gh->proto_discr = GSM48_PDISC_RR; |
| 431 | gh->msg_type = GSM48_MT_RR_ASS_CMD; |
| 432 | |
| 433 | /* |
| 434 | * fill the channel information element, this code |
| 435 | * should probably be shared with rsl_rx_chan_rqd(), |
Max | 7a301d3 | 2016-04-07 11:38:52 +0200 | [diff] [blame] | 436 | * gsm48_lchan_modify(). But beware that 10.5.2.5 |
Holger Hans Peter Freyther | e81a610 | 2009-10-22 11:47:45 +0200 | [diff] [blame] | 437 | * 10.5.2.5.a have slightly different semantic for |
| 438 | * the chan_desc. But as long as multi-slot configurations |
| 439 | * are not used we seem to be fine. |
| 440 | */ |
Harald Welte | a39b0f2 | 2010-06-14 22:26:10 +0200 | [diff] [blame] | 441 | gsm48_lchan2chan_desc(&ass->chan_desc, lchan); |
Holger Hans Peter Freyther | e81a610 | 2009-10-22 11:47:45 +0200 | [diff] [blame] | 442 | ass->power_command = power_command; |
| 443 | |
Harald Welte | 29aca17 | 2010-06-15 16:45:51 +0200 | [diff] [blame] | 444 | /* optional: cell channel description */ |
| 445 | |
Holger Hans Peter Freyther | 1b891fd | 2010-01-28 11:51:24 +0100 | [diff] [blame] | 446 | msgb_tv_put(msg, GSM48_IE_CHANMODE_1, lchan->tch_mode); |
| 447 | |
Harald Welte | 29aca17 | 2010-06-15 16:45:51 +0200 | [diff] [blame] | 448 | /* mobile allocation in case of hopping */ |
| 449 | if (lchan->ts->hopping.enabled) { |
| 450 | msgb_tlv_put(msg, GSM48_IE_MA_BEFORE, lchan->ts->hopping.ma_len, |
| 451 | lchan->ts->hopping.ma_data); |
| 452 | } |
| 453 | |
Holger Hans Peter Freyther | a6bcc74 | 2009-11-16 22:49:24 +0100 | [diff] [blame] | 454 | /* in case of multi rate we need to attach a config */ |
Holger Hans Peter Freyther | 11cb7a9 | 2015-08-20 19:32:46 +0200 | [diff] [blame] | 455 | mr_config_for_ms(lchan, msg); |
Holger Hans Peter Freyther | a6bcc74 | 2009-11-16 22:49:24 +0100 | [diff] [blame] | 456 | |
Holger Hans Peter Freyther | 9c137a7 | 2010-06-15 13:57:40 +0800 | [diff] [blame] | 457 | return gsm48_sendmsg(msg); |
Holger Hans Peter Freyther | e81a610 | 2009-10-22 11:47:45 +0200 | [diff] [blame] | 458 | } |
Holger Hans Peter Freyther | ff3f260 | 2009-10-22 15:13:00 +0200 | [diff] [blame] | 459 | |
| 460 | /* 9.1.5 Channel mode modify: Modify the mode on the MS side */ |
Max | 7a301d3 | 2016-04-07 11:38:52 +0200 | [diff] [blame] | 461 | int gsm48_lchan_modify(struct gsm_lchan *lchan, uint8_t mode) |
Holger Hans Peter Freyther | ff3f260 | 2009-10-22 15:13:00 +0200 | [diff] [blame] | 462 | { |
Holger Hans Peter Freyther | 8239e06 | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 463 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 CHN MOD"); |
Holger Hans Peter Freyther | ff3f260 | 2009-10-22 15:13:00 +0200 | [diff] [blame] | 464 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 465 | struct gsm48_chan_mode_modify *cmm = |
| 466 | (struct gsm48_chan_mode_modify *) msgb_put(msg, sizeof(*cmm)); |
Holger Hans Peter Freyther | ff3f260 | 2009-10-22 15:13:00 +0200 | [diff] [blame] | 467 | |
| 468 | DEBUGP(DRR, "-> CHANNEL MODE MODIFY mode=0x%02x\n", mode); |
| 469 | |
| 470 | lchan->tch_mode = mode; |
| 471 | msg->lchan = lchan; |
| 472 | gh->proto_discr = GSM48_PDISC_RR; |
| 473 | gh->msg_type = GSM48_MT_RR_CHAN_MODE_MODIF; |
| 474 | |
| 475 | /* fill the channel information element, this code |
| 476 | * should probably be shared with rsl_rx_chan_rqd() */ |
Harald Welte | a39b0f2 | 2010-06-14 22:26:10 +0200 | [diff] [blame] | 477 | gsm48_lchan2chan_desc(&cmm->chan_desc, lchan); |
Holger Hans Peter Freyther | ff3f260 | 2009-10-22 15:13:00 +0200 | [diff] [blame] | 478 | cmm->mode = mode; |
| 479 | |
Holger Hans Peter Freyther | a6bcc74 | 2009-11-16 22:49:24 +0100 | [diff] [blame] | 480 | /* in case of multi rate we need to attach a config */ |
Holger Hans Peter Freyther | 11cb7a9 | 2015-08-20 19:32:46 +0200 | [diff] [blame] | 481 | mr_config_for_ms(lchan, msg); |
Holger Hans Peter Freyther | a6bcc74 | 2009-11-16 22:49:24 +0100 | [diff] [blame] | 482 | |
Holger Hans Peter Freyther | 9c137a7 | 2010-06-15 13:57:40 +0800 | [diff] [blame] | 483 | return gsm48_sendmsg(msg); |
Holger Hans Peter Freyther | ff3f260 | 2009-10-22 15:13:00 +0200 | [diff] [blame] | 484 | } |
| 485 | |
Holger Hans Peter Freyther | f520e64 | 2009-10-22 15:23:11 +0200 | [diff] [blame] | 486 | int gsm48_rx_rr_modif_ack(struct msgb *msg) |
| 487 | { |
Holger Hans Peter Freyther | 25b1e25 | 2009-11-18 19:30:24 +0100 | [diff] [blame] | 488 | int rc; |
Holger Hans Peter Freyther | f520e64 | 2009-10-22 15:23:11 +0200 | [diff] [blame] | 489 | struct gsm48_hdr *gh = msgb_l3(msg); |
| 490 | struct gsm48_chan_mode_modify *mod = |
| 491 | (struct gsm48_chan_mode_modify *) gh->data; |
| 492 | |
| 493 | DEBUGP(DRR, "CHANNEL MODE MODIFY ACK\n"); |
| 494 | |
| 495 | if (mod->mode != msg->lchan->tch_mode) { |
Harald Welte | 50720e7 | 2009-12-24 11:50:20 +0100 | [diff] [blame] | 496 | LOGP(DRR, LOGL_ERROR, "CHANNEL MODE change failed. Wanted: %d Got: %d\n", |
Holger Hans Peter Freyther | f520e64 | 2009-10-22 15:23:11 +0200 | [diff] [blame] | 497 | msg->lchan->tch_mode, mod->mode); |
| 498 | return -1; |
| 499 | } |
| 500 | |
| 501 | /* update the channel type */ |
| 502 | switch (mod->mode) { |
| 503 | case GSM48_CMODE_SIGN: |
| 504 | msg->lchan->rsl_cmode = RSL_CMOD_SPD_SIGN; |
| 505 | break; |
| 506 | case GSM48_CMODE_SPEECH_V1: |
| 507 | case GSM48_CMODE_SPEECH_EFR: |
| 508 | case GSM48_CMODE_SPEECH_AMR: |
| 509 | msg->lchan->rsl_cmode = RSL_CMOD_SPD_SPEECH; |
| 510 | break; |
| 511 | case GSM48_CMODE_DATA_14k5: |
| 512 | case GSM48_CMODE_DATA_12k0: |
| 513 | case GSM48_CMODE_DATA_6k0: |
| 514 | case GSM48_CMODE_DATA_3k6: |
| 515 | msg->lchan->rsl_cmode = RSL_CMOD_SPD_DATA; |
| 516 | break; |
| 517 | } |
| 518 | |
| 519 | /* We've successfully modified the MS side of the channel, |
| 520 | * now go on to modify the BTS side of the channel */ |
Holger Hans Peter Freyther | 25b1e25 | 2009-11-18 19:30:24 +0100 | [diff] [blame] | 521 | rc = rsl_chan_mode_modify_req(msg->lchan); |
| 522 | |
| 523 | /* FIXME: we not only need to do this after mode modify, but |
| 524 | * also after channel activation */ |
| 525 | if (is_ipaccess_bts(msg->lchan->ts->trx->bts) && mod->mode != GSM48_CMODE_SIGN) |
| 526 | rsl_ipacc_crcx(msg->lchan); |
| 527 | return rc; |
Holger Hans Peter Freyther | f520e64 | 2009-10-22 15:23:11 +0200 | [diff] [blame] | 528 | } |
Holger Hans Peter Freyther | 92ffd92 | 2009-12-22 07:45:17 +0100 | [diff] [blame] | 529 | |
| 530 | int gsm48_parse_meas_rep(struct gsm_meas_rep *rep, struct msgb *msg) |
| 531 | { |
| 532 | struct gsm48_hdr *gh = msgb_l3(msg); |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 533 | uint8_t *data = gh->data; |
Holger Hans Peter Freyther | 92ffd92 | 2009-12-22 07:45:17 +0100 | [diff] [blame] | 534 | struct gsm_bts *bts = msg->lchan->ts->trx->bts; |
| 535 | struct bitvec *nbv = &bts->si_common.neigh_list; |
Harald Welte | a06c35e | 2009-12-25 22:46:25 +0100 | [diff] [blame] | 536 | struct gsm_meas_rep_cell *mrc; |
Holger Hans Peter Freyther | 92ffd92 | 2009-12-22 07:45:17 +0100 | [diff] [blame] | 537 | |
| 538 | if (gh->msg_type != GSM48_MT_RR_MEAS_REP) |
| 539 | return -EINVAL; |
| 540 | |
| 541 | if (data[0] & 0x80) |
| 542 | rep->flags |= MEAS_REP_F_BA1; |
| 543 | if (data[0] & 0x40) |
| 544 | rep->flags |= MEAS_REP_F_UL_DTX; |
| 545 | if ((data[1] & 0x40) == 0x00) |
| 546 | rep->flags |= MEAS_REP_F_DL_VALID; |
| 547 | |
| 548 | rep->dl.full.rx_lev = data[0] & 0x3f; |
| 549 | rep->dl.sub.rx_lev = data[1] & 0x3f; |
Sylvain Munaut | 48ea4e8 | 2012-12-25 13:06:27 +0100 | [diff] [blame] | 550 | rep->dl.full.rx_qual = (data[2] >> 4) & 0x7; |
| 551 | rep->dl.sub.rx_qual = (data[2] >> 1) & 0x7; |
Holger Hans Peter Freyther | 92ffd92 | 2009-12-22 07:45:17 +0100 | [diff] [blame] | 552 | |
| 553 | rep->num_cell = ((data[3] >> 6) & 0x3) | ((data[2] & 0x01) << 2); |
Neels Hofmeyr | f0141b9 | 2018-03-08 03:17:48 +0100 | [diff] [blame^] | 554 | if (rep->num_cell < 1 || rep->num_cell > 6) { |
| 555 | /* There are no neighbor cell reports present. */ |
| 556 | rep->num_cell = 0; |
Holger Hans Peter Freyther | 92ffd92 | 2009-12-22 07:45:17 +0100 | [diff] [blame] | 557 | return 0; |
Neels Hofmeyr | f0141b9 | 2018-03-08 03:17:48 +0100 | [diff] [blame^] | 558 | } |
Holger Hans Peter Freyther | 92ffd92 | 2009-12-22 07:45:17 +0100 | [diff] [blame] | 559 | |
| 560 | /* an encoding nightmare in perfection */ |
Harald Welte | a06c35e | 2009-12-25 22:46:25 +0100 | [diff] [blame] | 561 | mrc = &rep->cell[0]; |
| 562 | mrc->rxlev = data[3] & 0x3f; |
Harald Welte | 950eca9 | 2009-12-25 22:49:34 +0100 | [diff] [blame] | 563 | mrc->neigh_idx = data[4] >> 3; |
Harald Welte | eaa95d5 | 2009-12-25 23:01:54 +0100 | [diff] [blame] | 564 | mrc->arfcn = bitvec_get_nth_set_bit(nbv, mrc->neigh_idx + 1); |
Harald Welte | a06c35e | 2009-12-25 22:46:25 +0100 | [diff] [blame] | 565 | mrc->bsic = ((data[4] & 0x07) << 3) | (data[5] >> 5); |
Holger Hans Peter Freyther | 92ffd92 | 2009-12-22 07:45:17 +0100 | [diff] [blame] | 566 | if (rep->num_cell < 2) |
| 567 | return 0; |
| 568 | |
Harald Welte | a06c35e | 2009-12-25 22:46:25 +0100 | [diff] [blame] | 569 | mrc = &rep->cell[1]; |
| 570 | mrc->rxlev = ((data[5] & 0x1f) << 1) | (data[6] >> 7); |
Harald Welte | 950eca9 | 2009-12-25 22:49:34 +0100 | [diff] [blame] | 571 | mrc->neigh_idx = (data[6] >> 2) & 0x1f; |
Harald Welte | eaa95d5 | 2009-12-25 23:01:54 +0100 | [diff] [blame] | 572 | mrc->arfcn = bitvec_get_nth_set_bit(nbv, mrc->neigh_idx + 1); |
Harald Welte | a06c35e | 2009-12-25 22:46:25 +0100 | [diff] [blame] | 573 | mrc->bsic = ((data[6] & 0x03) << 4) | (data[7] >> 4); |
Holger Hans Peter Freyther | 92ffd92 | 2009-12-22 07:45:17 +0100 | [diff] [blame] | 574 | if (rep->num_cell < 3) |
| 575 | return 0; |
| 576 | |
Harald Welte | a06c35e | 2009-12-25 22:46:25 +0100 | [diff] [blame] | 577 | mrc = &rep->cell[2]; |
| 578 | mrc->rxlev = ((data[7] & 0x0f) << 2) | (data[8] >> 6); |
Harald Welte | 950eca9 | 2009-12-25 22:49:34 +0100 | [diff] [blame] | 579 | mrc->neigh_idx = (data[8] >> 1) & 0x1f; |
Harald Welte | eaa95d5 | 2009-12-25 23:01:54 +0100 | [diff] [blame] | 580 | mrc->arfcn = bitvec_get_nth_set_bit(nbv, mrc->neigh_idx + 1); |
Harald Welte (local) | 6589858 | 2009-12-26 14:12:43 +0100 | [diff] [blame] | 581 | mrc->bsic = ((data[8] & 0x01) << 5) | (data[9] >> 3); |
Holger Hans Peter Freyther | 92ffd92 | 2009-12-22 07:45:17 +0100 | [diff] [blame] | 582 | if (rep->num_cell < 4) |
| 583 | return 0; |
| 584 | |
Harald Welte | a06c35e | 2009-12-25 22:46:25 +0100 | [diff] [blame] | 585 | mrc = &rep->cell[3]; |
| 586 | mrc->rxlev = ((data[9] & 0x07) << 3) | (data[10] >> 5); |
Harald Welte | 950eca9 | 2009-12-25 22:49:34 +0100 | [diff] [blame] | 587 | mrc->neigh_idx = data[10] & 0x1f; |
Harald Welte | eaa95d5 | 2009-12-25 23:01:54 +0100 | [diff] [blame] | 588 | mrc->arfcn = bitvec_get_nth_set_bit(nbv, mrc->neigh_idx + 1); |
Harald Welte | a06c35e | 2009-12-25 22:46:25 +0100 | [diff] [blame] | 589 | mrc->bsic = data[11] >> 2; |
Holger Hans Peter Freyther | 92ffd92 | 2009-12-22 07:45:17 +0100 | [diff] [blame] | 590 | if (rep->num_cell < 5) |
| 591 | return 0; |
| 592 | |
Harald Welte | a06c35e | 2009-12-25 22:46:25 +0100 | [diff] [blame] | 593 | mrc = &rep->cell[4]; |
| 594 | mrc->rxlev = ((data[11] & 0x03) << 4) | (data[12] >> 4); |
Harald Welte | 950eca9 | 2009-12-25 22:49:34 +0100 | [diff] [blame] | 595 | mrc->neigh_idx = ((data[12] & 0xf) << 1) | (data[13] >> 7); |
Harald Welte | eaa95d5 | 2009-12-25 23:01:54 +0100 | [diff] [blame] | 596 | mrc->arfcn = bitvec_get_nth_set_bit(nbv, mrc->neigh_idx + 1); |
Harald Welte | a06c35e | 2009-12-25 22:46:25 +0100 | [diff] [blame] | 597 | mrc->bsic = (data[13] >> 1) & 0x3f; |
Holger Hans Peter Freyther | 92ffd92 | 2009-12-22 07:45:17 +0100 | [diff] [blame] | 598 | if (rep->num_cell < 6) |
| 599 | return 0; |
| 600 | |
Harald Welte | a06c35e | 2009-12-25 22:46:25 +0100 | [diff] [blame] | 601 | mrc = &rep->cell[5]; |
Harald Welte | 950eca9 | 2009-12-25 22:49:34 +0100 | [diff] [blame] | 602 | mrc->rxlev = ((data[13] & 0x01) << 5) | (data[14] >> 3); |
| 603 | mrc->neigh_idx = ((data[14] & 0x07) << 2) | (data[15] >> 6); |
Harald Welte | eaa95d5 | 2009-12-25 23:01:54 +0100 | [diff] [blame] | 604 | mrc->arfcn = bitvec_get_nth_set_bit(nbv, mrc->neigh_idx + 1); |
Harald Welte | a06c35e | 2009-12-25 22:46:25 +0100 | [diff] [blame] | 605 | mrc->bsic = data[15] & 0x3f; |
Holger Hans Peter Freyther | 92ffd92 | 2009-12-22 07:45:17 +0100 | [diff] [blame] | 606 | |
| 607 | return 0; |
| 608 | } |
Holger Hans Peter Freyther | 2c0f166 | 2010-06-15 19:39:27 +0800 | [diff] [blame] | 609 | |
Jacob Erlbeck | 24d3b91 | 2013-10-31 15:36:41 +0100 | [diff] [blame] | 610 | /* 9.2.5 CM service accept */ |
| 611 | int gsm48_tx_mm_serv_ack(struct gsm_subscriber_connection *conn) |
| 612 | { |
Holger Hans Peter Freyther | 8239e06 | 2016-01-25 22:03:25 +0100 | [diff] [blame] | 613 | struct msgb *msg = gsm48_msgb_alloc_name("GSM 04.08 SERV ACK"); |
Jacob Erlbeck | 24d3b91 | 2013-10-31 15:36:41 +0100 | [diff] [blame] | 614 | struct gsm48_hdr *gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh)); |
| 615 | |
| 616 | msg->lchan = conn->lchan; |
| 617 | |
| 618 | gh->proto_discr = GSM48_PDISC_MM; |
| 619 | gh->msg_type = GSM48_MT_MM_CM_SERV_ACC; |
| 620 | |
| 621 | DEBUGP(DMM, "-> CM SERVICE ACK\n"); |
| 622 | |
| 623 | return gsm0808_submit_dtap(conn, msg, 0, 0); |
| 624 | } |
| 625 | |
| 626 | /* 9.2.6 CM service reject */ |
| 627 | int gsm48_tx_mm_serv_rej(struct gsm_subscriber_connection *conn, |
| 628 | enum gsm48_reject_value value) |
| 629 | { |
| 630 | struct msgb *msg; |
| 631 | |
| 632 | msg = gsm48_create_mm_serv_rej(value); |
| 633 | if (!msg) { |
| 634 | LOGP(DMM, LOGL_ERROR, "Failed to allocate CM Service Reject.\n"); |
| 635 | return -1; |
| 636 | } |
| 637 | |
| 638 | DEBUGP(DMM, "-> CM SERVICE Reject cause: %d\n", value); |
| 639 | |
| 640 | return gsm0808_submit_dtap(conn, msg, 0, 0); |
| 641 | } |
Neels Hofmeyr | b540077 | 2018-02-13 23:48:24 +0100 | [diff] [blame] | 642 | |
| 643 | struct msgb *gsm48_create_mm_serv_rej(enum gsm48_reject_value value) |
| 644 | { |
| 645 | struct msgb *msg; |
| 646 | struct gsm48_hdr *gh; |
| 647 | |
| 648 | msg = gsm48_msgb_alloc_name("GSM 04.08 SERV REJ"); |
| 649 | if (!msg) |
| 650 | return NULL; |
| 651 | |
| 652 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 653 | gh->proto_discr = GSM48_PDISC_MM; |
| 654 | gh->msg_type = GSM48_MT_MM_CM_SERV_REJ; |
| 655 | gh->data[0] = value; |
| 656 | |
| 657 | return msg; |
| 658 | } |
| 659 | |
| 660 | struct msgb *gsm48_create_loc_upd_rej(uint8_t cause) |
| 661 | { |
| 662 | struct gsm48_hdr *gh; |
| 663 | struct msgb *msg; |
| 664 | |
| 665 | msg = gsm48_msgb_alloc_name("GSM 04.08 LOC UPD REJ"); |
| 666 | if (!msg) |
| 667 | return NULL; |
| 668 | |
| 669 | gh = (struct gsm48_hdr *) msgb_put(msg, sizeof(*gh) + 1); |
| 670 | gh->proto_discr = GSM48_PDISC_MM; |
| 671 | gh->msg_type = GSM48_MT_MM_LOC_UPD_REJECT; |
| 672 | gh->data[0] = cause; |
| 673 | return msg; |
| 674 | } |
| 675 | |
| 676 | int gsm48_extract_mi(uint8_t *classmark2_lv, int length, char *mi_string, uint8_t *mi_type) |
| 677 | { |
| 678 | /* Check the size for the classmark */ |
| 679 | if (length < 1 + *classmark2_lv) |
| 680 | return -1; |
| 681 | |
| 682 | uint8_t *mi_lv = classmark2_lv + *classmark2_lv + 1; |
| 683 | if (length < 2 + *classmark2_lv + mi_lv[0]) |
| 684 | return -2; |
| 685 | |
| 686 | *mi_type = mi_lv[1] & GSM_MI_TYPE_MASK; |
| 687 | return gsm48_mi_to_string(mi_string, GSM48_MI_SIZE, mi_lv+1, *mi_lv); |
| 688 | } |
| 689 | |
| 690 | int gsm48_paging_extract_mi(struct gsm48_pag_resp *resp, int length, |
| 691 | char *mi_string, uint8_t *mi_type) |
| 692 | { |
| 693 | static const uint32_t classmark_offset = |
| 694 | offsetof(struct gsm48_pag_resp, classmark2); |
| 695 | uint8_t *classmark2_lv = (uint8_t *) &resp->classmark2; |
| 696 | return gsm48_extract_mi(classmark2_lv, length - classmark_offset, |
| 697 | mi_string, mi_type); |
| 698 | } |