Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 1 | /* GSM 04.08 System Information (SI) encoding and decoding |
| 2 | * 3GPP TS 04.08 version 7.21.0 Release 1998 / ETSI TS 100 940 V7.21.0 */ |
| 3 | |
Harald Welte | 7401ae6 | 2010-06-15 16:44:12 +0200 | [diff] [blame] | 4 | /* (C) 2008-2010 by Harald Welte <laforge@gnumonks.org> |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 5 | * |
| 6 | * All Rights Reserved |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 9 | * it under the terms of the GNU Affero General Public License as published by |
| 10 | * the Free Software Foundation; either version 3 of the License, or |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 16 | * GNU Affero General Public License for more details. |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 17 | * |
Harald Welte | 9af6ddf | 2011-01-01 15:25:50 +0100 | [diff] [blame] | 18 | * You should have received a copy of the GNU Affero General Public License |
| 19 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 20 | * |
| 21 | */ |
| 22 | |
| 23 | #include <errno.h> |
| 24 | #include <string.h> |
Harald Welte | 6c40def | 2009-12-14 22:07:14 +0100 | [diff] [blame] | 25 | #include <stdio.h> |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 26 | #include <netinet/in.h> |
| 27 | |
Harald Welte | 80cffaf | 2011-05-24 15:02:20 +0200 | [diff] [blame] | 28 | #include <osmocom/core/bitvec.h> |
| 29 | #include <osmocom/core/utils.h> |
| 30 | #include <osmocom/gsm/sysinfo.h> |
| 31 | |
| 32 | #include <openbsc/debug.h> |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 33 | #include <openbsc/gsm_04_08.h> |
| 34 | #include <openbsc/gsm_data.h> |
| 35 | #include <openbsc/abis_rsl.h> |
| 36 | #include <openbsc/rest_octets.h> |
| 37 | |
Holger Hans Peter Freyther | b91a106 | 2010-01-06 06:38:14 +0100 | [diff] [blame] | 38 | |
Harald Welte | da760d3 | 2009-12-14 20:25:05 +0100 | [diff] [blame] | 39 | /* Frequency Lists as per TS 04.08 10.5.2.13 */ |
| 40 | |
| 41 | /* 10.5.2.13.2: Bit map 0 format */ |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 42 | static int freq_list_bm0_set_arfcn(uint8_t *chan_list, unsigned int arfcn) |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 43 | { |
| 44 | unsigned int byte, bit; |
| 45 | |
Harald Welte | b1d4c8e | 2009-12-17 23:10:46 +0100 | [diff] [blame] | 46 | if (arfcn > 124 || arfcn < 1) { |
| 47 | LOGP(DRR, LOGL_ERROR, "Bitmap 0 only supports ARFCN 1...124\n"); |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 48 | return -EINVAL; |
Harald Welte | b1d4c8e | 2009-12-17 23:10:46 +0100 | [diff] [blame] | 49 | } |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 50 | |
Harald Welte | da760d3 | 2009-12-14 20:25:05 +0100 | [diff] [blame] | 51 | /* the bitmask is from 1..124, not from 0..123 */ |
| 52 | arfcn--; |
| 53 | |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 54 | byte = arfcn / 8; |
| 55 | bit = arfcn % 8; |
| 56 | |
Harald Welte | da760d3 | 2009-12-14 20:25:05 +0100 | [diff] [blame] | 57 | chan_list[GSM48_CELL_CHAN_DESC_SIZE-1-byte] |= (1 << bit); |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 58 | |
| 59 | return 0; |
| 60 | } |
| 61 | |
Harald Welte | da760d3 | 2009-12-14 20:25:05 +0100 | [diff] [blame] | 62 | /* 10.5.2.13.7: Variable bit map format */ |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 63 | static int freq_list_bmrel_set_arfcn(uint8_t *chan_list, unsigned int arfcn) |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 64 | { |
| 65 | unsigned int byte, bit; |
| 66 | unsigned int min_arfcn; |
| 67 | unsigned int bitno; |
| 68 | |
| 69 | min_arfcn = (chan_list[0] & 1) << 9; |
| 70 | min_arfcn |= chan_list[1] << 1; |
| 71 | min_arfcn |= (chan_list[2] >> 7) & 1; |
| 72 | |
| 73 | /* The lower end of our bitmaks is always implicitly included */ |
| 74 | if (arfcn == min_arfcn) |
| 75 | return 0; |
| 76 | |
Harald Welte | 152b626 | 2009-12-16 11:57:48 +0100 | [diff] [blame] | 77 | if (arfcn < min_arfcn) { |
Harald Welte | b1d4c8e | 2009-12-17 23:10:46 +0100 | [diff] [blame] | 78 | LOGP(DRR, LOGL_ERROR, "arfcn(%u) < min(%u)\n", arfcn, min_arfcn); |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 79 | return -EINVAL; |
Harald Welte | 152b626 | 2009-12-16 11:57:48 +0100 | [diff] [blame] | 80 | } |
| 81 | if (arfcn > min_arfcn + 111) { |
Harald Welte | b1d4c8e | 2009-12-17 23:10:46 +0100 | [diff] [blame] | 82 | LOGP(DRR, LOGL_ERROR, "arfcn(%u) > min(%u) + 111\n", arfcn, min_arfcn); |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 83 | return -EINVAL; |
Harald Welte | 152b626 | 2009-12-16 11:57:48 +0100 | [diff] [blame] | 84 | } |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 85 | |
| 86 | bitno = (arfcn - min_arfcn); |
| 87 | byte = bitno / 8; |
| 88 | bit = bitno % 8; |
| 89 | |
| 90 | chan_list[2 + byte] |= 1 << (7 - bit); |
| 91 | |
| 92 | return 0; |
| 93 | } |
| 94 | |
| 95 | /* generate a cell channel list as per Section 10.5.2.1b of 04.08 */ |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 96 | static int bitvec2freq_list(uint8_t *chan_list, struct bitvec *bv, |
Harald Welte | 6c40def | 2009-12-14 22:07:14 +0100 | [diff] [blame] | 97 | const struct gsm_bts *bts) |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 98 | { |
Sylvain Munaut | 42a5652 | 2009-12-24 14:20:19 +0100 | [diff] [blame] | 99 | int i, rc, min = 1024, max = -1; |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 100 | |
| 101 | memset(chan_list, 0, 16); |
| 102 | |
| 103 | /* GSM900-only handsets only support 'bit map 0 format' */ |
| 104 | if (bts->band == GSM_BAND_900) { |
| 105 | chan_list[0] = 0; |
Harald Welte | 6c40def | 2009-12-14 22:07:14 +0100 | [diff] [blame] | 106 | |
| 107 | for (i = 0; i < bv->data_len*8; i++) { |
| 108 | if (bitvec_get_bit_pos(bv, i)) { |
| 109 | rc = freq_list_bm0_set_arfcn(chan_list, i); |
| 110 | if (rc < 0) |
| 111 | return rc; |
| 112 | } |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 113 | } |
| 114 | return 0; |
| 115 | } |
| 116 | |
| 117 | /* We currently only support the 'Variable bitmap format' */ |
| 118 | chan_list[0] = 0x8e; |
| 119 | |
Harald Welte | 6c40def | 2009-12-14 22:07:14 +0100 | [diff] [blame] | 120 | for (i = 0; i < bv->data_len*8; i++) { |
| 121 | if (bitvec_get_bit_pos(bv, i)) { |
| 122 | if (i < min) |
| 123 | min = i; |
| 124 | if (i > max) |
| 125 | max = i; |
| 126 | } |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 127 | } |
| 128 | |
Sylvain Munaut | 42a5652 | 2009-12-24 14:20:19 +0100 | [diff] [blame] | 129 | if (max == -1) { |
| 130 | /* Empty set, use 'bit map 0 format' */ |
| 131 | chan_list[0] = 0; |
| 132 | return 0; |
| 133 | } |
| 134 | |
Harald Welte | 152b626 | 2009-12-16 11:57:48 +0100 | [diff] [blame] | 135 | if ((max - min) > 111) { |
Harald Welte | b1d4c8e | 2009-12-17 23:10:46 +0100 | [diff] [blame] | 136 | LOGP(DRR, LOGL_ERROR, "min_arfcn=%u, max_arfcn=%u, " |
| 137 | "distance > 111\n", min, max); |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 138 | return -EINVAL; |
Harald Welte | 152b626 | 2009-12-16 11:57:48 +0100 | [diff] [blame] | 139 | } |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 140 | |
| 141 | chan_list[0] |= (min >> 9) & 1; |
| 142 | chan_list[1] = (min >> 1); |
| 143 | chan_list[2] = (min & 1) << 7; |
| 144 | |
Harald Welte | 6c40def | 2009-12-14 22:07:14 +0100 | [diff] [blame] | 145 | for (i = 0; i < bv->data_len*8; i++) { |
Harald Welte | 152b626 | 2009-12-16 11:57:48 +0100 | [diff] [blame] | 146 | if (bitvec_get_bit_pos(bv, i)) { |
| 147 | rc = freq_list_bmrel_set_arfcn(chan_list, i); |
| 148 | if (rc < 0) |
| 149 | return rc; |
| 150 | } |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 151 | } |
| 152 | |
| 153 | return 0; |
| 154 | } |
| 155 | |
| 156 | /* generate a cell channel list as per Section 10.5.2.1b of 04.08 */ |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 157 | static int generate_cell_chan_list(uint8_t *chan_list, struct gsm_bts *bts) |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 158 | { |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 159 | struct gsm_bts_trx *trx; |
Harald Welte | 6c40def | 2009-12-14 22:07:14 +0100 | [diff] [blame] | 160 | struct bitvec *bv = &bts->si_common.cell_alloc; |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 161 | |
Harald Welte | a39b0f2 | 2010-06-14 22:26:10 +0200 | [diff] [blame] | 162 | /* Zero-initialize the bit-vector */ |
Harald Welte | c8794b5 | 2010-06-16 11:09:18 +0200 | [diff] [blame] | 163 | memset(bv->data, 0, bv->data_len); |
Harald Welte | a39b0f2 | 2010-06-14 22:26:10 +0200 | [diff] [blame] | 164 | |
Harald Welte | 6c40def | 2009-12-14 22:07:14 +0100 | [diff] [blame] | 165 | /* first we generate a bitvec of all TRX ARFCN's in our BTS */ |
Harald Welte | a39b0f2 | 2010-06-14 22:26:10 +0200 | [diff] [blame] | 166 | llist_for_each_entry(trx, &bts->trx_list, list) { |
| 167 | unsigned int i, j; |
| 168 | /* Always add the TRX's ARFCN */ |
Harald Welte | 6c40def | 2009-12-14 22:07:14 +0100 | [diff] [blame] | 169 | bitvec_set_bit_pos(bv, trx->arfcn, 1); |
Harald Welte | a39b0f2 | 2010-06-14 22:26:10 +0200 | [diff] [blame] | 170 | for (i = 0; i < ARRAY_SIZE(trx->ts); i++) { |
| 171 | struct gsm_bts_trx_ts *ts = &trx->ts[i]; |
| 172 | /* Add any ARFCNs present in hopping channels */ |
| 173 | for (j = 0; j < 1024; j++) { |
| 174 | if (bitvec_get_bit_pos(&ts->hopping.arfcns, j)) |
| 175 | bitvec_set_bit_pos(bv, j, 1); |
| 176 | } |
| 177 | } |
| 178 | } |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 179 | |
Harald Welte | 6c40def | 2009-12-14 22:07:14 +0100 | [diff] [blame] | 180 | /* then we generate a GSM 04.08 frequency list from the bitvec */ |
| 181 | return bitvec2freq_list(chan_list, bv, bts); |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 182 | } |
| 183 | |
Harald Welte | 6c40def | 2009-12-14 22:07:14 +0100 | [diff] [blame] | 184 | /* generate a cell channel list as per Section 10.5.2.1b of 04.08 */ |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 185 | static int generate_bcch_chan_list(uint8_t *chan_list, struct gsm_bts *bts, int si5) |
Harald Welte | 6c40def | 2009-12-14 22:07:14 +0100 | [diff] [blame] | 186 | { |
| 187 | struct gsm_bts *cur_bts; |
Harald Welte | 64c07d2 | 2011-02-15 11:43:27 +0100 | [diff] [blame] | 188 | struct bitvec *bv; |
| 189 | |
| 190 | if (si5 && bts->neigh_list_manual_mode == NL_MODE_MANUAL_SI5SEP) |
| 191 | bv = &bts->si_common.si5_neigh_list; |
| 192 | else |
| 193 | bv = &bts->si_common.neigh_list; |
Harald Welte | 6c40def | 2009-12-14 22:07:14 +0100 | [diff] [blame] | 194 | |
Harald Welte | 32c0962 | 2011-01-11 23:44:56 +0100 | [diff] [blame] | 195 | /* Generate list of neighbor cells if we are in automatic mode */ |
Harald Welte | 64c07d2 | 2011-02-15 11:43:27 +0100 | [diff] [blame] | 196 | if (bts->neigh_list_manual_mode == NL_MODE_AUTOMATIC) { |
Harald Welte | 21bbda2 | 2011-02-19 20:43:37 +0100 | [diff] [blame] | 197 | /* Zero-initialize the bit-vector */ |
| 198 | memset(bv->data, 0, bv->data_len); |
| 199 | |
Harald Welte | 32c0962 | 2011-01-11 23:44:56 +0100 | [diff] [blame] | 200 | /* first we generate a bitvec of the BCCH ARFCN's in our BSC */ |
| 201 | llist_for_each_entry(cur_bts, &bts->network->bts_list, list) { |
| 202 | if (cur_bts == bts) |
| 203 | continue; |
| 204 | bitvec_set_bit_pos(bv, cur_bts->c0->arfcn, 1); |
| 205 | } |
Harald Welte | 6c40def | 2009-12-14 22:07:14 +0100 | [diff] [blame] | 206 | } |
| 207 | |
| 208 | /* then we generate a GSM 04.08 frequency list from the bitvec */ |
| 209 | return bitvec2freq_list(chan_list, bv, bts); |
| 210 | } |
| 211 | |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 212 | static int generate_si1(uint8_t *output, struct gsm_bts *bts) |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 213 | { |
| 214 | int rc; |
| 215 | struct gsm48_system_information_type_1 *si1 = |
| 216 | (struct gsm48_system_information_type_1 *) output; |
| 217 | |
| 218 | memset(si1, GSM_MACBLOCK_PADDING, GSM_MACBLOCK_LEN); |
| 219 | |
| 220 | si1->header.l2_plen = (21 << 2) | 1; |
| 221 | si1->header.rr_protocol_discriminator = GSM48_PDISC_RR; |
| 222 | si1->header.skip_indicator = 0; |
| 223 | si1->header.system_information = GSM48_MT_RR_SYSINFO_1; |
| 224 | |
| 225 | rc = generate_cell_chan_list(si1->cell_channel_description, bts); |
| 226 | if (rc < 0) |
| 227 | return rc; |
| 228 | |
| 229 | si1->rach_control = bts->si_common.rach_control; |
| 230 | |
| 231 | /* SI1 Rest Octets (10.5.2.32), contains NCH position */ |
Holger Hans Peter Freyther | 7ec448d | 2010-01-06 07:52:31 +0100 | [diff] [blame] | 232 | rc = rest_octets_si1(si1->rest_octets, NULL); |
Harald Welte | 7401ae6 | 2010-06-15 16:44:12 +0200 | [diff] [blame] | 233 | |
Holger Hans Peter Freyther | 7ec448d | 2010-01-06 07:52:31 +0100 | [diff] [blame] | 234 | return sizeof(*si1) + rc; |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 235 | } |
| 236 | |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 237 | static int generate_si2(uint8_t *output, struct gsm_bts *bts) |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 238 | { |
| 239 | int rc; |
| 240 | struct gsm48_system_information_type_2 *si2 = |
| 241 | (struct gsm48_system_information_type_2 *) output; |
| 242 | |
| 243 | memset(si2, GSM_MACBLOCK_PADDING, GSM_MACBLOCK_LEN); |
| 244 | |
| 245 | si2->header.l2_plen = (22 << 2) | 1; |
| 246 | si2->header.rr_protocol_discriminator = GSM48_PDISC_RR; |
| 247 | si2->header.skip_indicator = 0; |
| 248 | si2->header.system_information = GSM48_MT_RR_SYSINFO_2; |
| 249 | |
Harald Welte | 64c07d2 | 2011-02-15 11:43:27 +0100 | [diff] [blame] | 250 | rc = generate_bcch_chan_list(si2->bcch_frequency_list, bts, 0); |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 251 | if (rc < 0) |
| 252 | return rc; |
| 253 | |
| 254 | si2->ncc_permitted = bts->si_common.ncc_permitted; |
| 255 | si2->rach_control = bts->si_common.rach_control; |
| 256 | |
Holger Hans Peter Freyther | 7ec448d | 2010-01-06 07:52:31 +0100 | [diff] [blame] | 257 | return sizeof(*si2); |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 258 | } |
| 259 | |
Harald Welte | 1f89329 | 2010-03-14 23:46:48 +0800 | [diff] [blame] | 260 | static struct gsm48_si_ro_info si_info = { |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 261 | .selection_params = { |
| 262 | .present = 0, |
| 263 | }, |
| 264 | .power_offset = { |
| 265 | .present = 0, |
| 266 | }, |
| 267 | .si2ter_indicator = 0, |
| 268 | .early_cm_ctrl = 1, |
| 269 | .scheduling = { |
| 270 | .present = 0, |
| 271 | }, |
| 272 | .gprs_ind = { |
| 273 | .si13_position = 0, |
| 274 | .ra_colour = 0, |
Harald Welte | 97a282b | 2010-03-14 15:37:43 +0800 | [diff] [blame] | 275 | .present = 1, |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 276 | }, |
| 277 | .lsa_params = { |
| 278 | .present = 0, |
| 279 | }, |
| 280 | .cell_id = 0, /* FIXME: doesn't the bts have this? */ |
| 281 | .break_ind = 0, |
| 282 | }; |
| 283 | |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 284 | static int generate_si3(uint8_t *output, struct gsm_bts *bts) |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 285 | { |
Holger Hans Peter Freyther | 7ec448d | 2010-01-06 07:52:31 +0100 | [diff] [blame] | 286 | int rc; |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 287 | struct gsm48_system_information_type_3 *si3 = |
| 288 | (struct gsm48_system_information_type_3 *) output; |
| 289 | |
| 290 | memset(si3, GSM_MACBLOCK_PADDING, GSM_MACBLOCK_LEN); |
| 291 | |
| 292 | si3->header.l2_plen = (18 << 2) | 1; |
| 293 | si3->header.rr_protocol_discriminator = GSM48_PDISC_RR; |
| 294 | si3->header.skip_indicator = 0; |
| 295 | si3->header.system_information = GSM48_MT_RR_SYSINFO_3; |
| 296 | |
| 297 | si3->cell_identity = htons(bts->cell_identity); |
Harald Welte | afedeab | 2010-03-04 10:55:40 +0100 | [diff] [blame] | 298 | gsm48_generate_lai(&si3->lai, bts->network->country_code, |
| 299 | bts->network->network_code, |
| 300 | bts->location_area_code); |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 301 | si3->control_channel_desc = bts->si_common.chan_desc; |
| 302 | si3->cell_options = bts->si_common.cell_options; |
| 303 | si3->cell_sel_par = bts->si_common.cell_sel_par; |
| 304 | si3->rach_control = bts->si_common.rach_control; |
| 305 | |
| 306 | /* SI3 Rest Octets (10.5.2.34), containing |
| 307 | CBQ, CELL_RESELECT_OFFSET, TEMPORARY_OFFSET, PENALTY_TIME |
| 308 | Power Offset, 2ter Indicator, Early Classmark Sending, |
| 309 | Scheduling if and WHERE, GPRS Indicator, SI13 position */ |
Holger Hans Peter Freyther | 7ec448d | 2010-01-06 07:52:31 +0100 | [diff] [blame] | 310 | rc = rest_octets_si3(si3->rest_octets, &si_info); |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 311 | |
Holger Hans Peter Freyther | 7ec448d | 2010-01-06 07:52:31 +0100 | [diff] [blame] | 312 | return sizeof(*si3) + rc; |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 313 | } |
| 314 | |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 315 | static int generate_si4(uint8_t *output, struct gsm_bts *bts) |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 316 | { |
Holger Hans Peter Freyther | 7ec448d | 2010-01-06 07:52:31 +0100 | [diff] [blame] | 317 | int rc; |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 318 | struct gsm48_system_information_type_4 *si4 = |
| 319 | (struct gsm48_system_information_type_4 *) output; |
| 320 | |
| 321 | /* length of all IEs present except SI4 rest octets and l2_plen */ |
| 322 | int l2_plen = sizeof(*si4) - 1; |
| 323 | |
| 324 | memset(si4, GSM_MACBLOCK_PADDING, GSM_MACBLOCK_LEN); |
| 325 | |
| 326 | si4->header.rr_protocol_discriminator = GSM48_PDISC_RR; |
| 327 | si4->header.skip_indicator = 0; |
| 328 | si4->header.system_information = GSM48_MT_RR_SYSINFO_4; |
| 329 | |
Harald Welte | afedeab | 2010-03-04 10:55:40 +0100 | [diff] [blame] | 330 | gsm48_generate_lai(&si4->lai, bts->network->country_code, |
| 331 | bts->network->network_code, |
| 332 | bts->location_area_code); |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 333 | si4->cell_sel_par = bts->si_common.cell_sel_par; |
| 334 | si4->rach_control = bts->si_common.rach_control; |
| 335 | |
| 336 | /* Optional: CBCH Channel Description + CBCH Mobile Allocation */ |
| 337 | |
| 338 | si4->header.l2_plen = (l2_plen << 2) | 1; |
| 339 | |
| 340 | /* SI4 Rest Octets (10.5.2.35), containing |
| 341 | Optional Power offset, GPRS Indicator, |
| 342 | Cell Identity, LSA ID, Selection Parameter */ |
Holger Hans Peter Freyther | 7ec448d | 2010-01-06 07:52:31 +0100 | [diff] [blame] | 343 | rc = rest_octets_si4(si4->data, &si_info); |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 344 | |
Holger Hans Peter Freyther | 7ec448d | 2010-01-06 07:52:31 +0100 | [diff] [blame] | 345 | return sizeof(*si4) + rc; |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 346 | } |
| 347 | |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 348 | static int generate_si5(uint8_t *output, struct gsm_bts *bts) |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 349 | { |
Harald Welte | e2d0d5f | 2009-12-19 21:26:54 +0100 | [diff] [blame] | 350 | struct gsm48_system_information_type_5 *si5; |
| 351 | int rc, l2_plen = 18; |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 352 | |
Holger Hans Peter Freyther | 17d81e2 | 2010-01-06 07:52:55 +0100 | [diff] [blame] | 353 | memset(output, GSM_MACBLOCK_PADDING, GSM_MACBLOCK_LEN); |
| 354 | |
Harald Welte | e2d0d5f | 2009-12-19 21:26:54 +0100 | [diff] [blame] | 355 | /* ip.access nanoBTS needs l2_plen!! */ |
Harald Welte | fd355a3 | 2011-03-04 13:41:31 +0100 | [diff] [blame] | 356 | switch (bts->type) { |
| 357 | case GSM_BTS_TYPE_NANOBTS: |
| 358 | case GSM_BTS_TYPE_HSL_FEMTO: |
Harald Welte | e2d0d5f | 2009-12-19 21:26:54 +0100 | [diff] [blame] | 359 | *output++ = (l2_plen << 2) | 1; |
| 360 | l2_plen++; |
Harald Welte | fd355a3 | 2011-03-04 13:41:31 +0100 | [diff] [blame] | 361 | break; |
| 362 | default: |
| 363 | break; |
Harald Welte | e2d0d5f | 2009-12-19 21:26:54 +0100 | [diff] [blame] | 364 | } |
| 365 | |
| 366 | si5 = (struct gsm48_system_information_type_5 *) output; |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 367 | |
| 368 | /* l2 pseudo length, not part of msg: 18 */ |
| 369 | si5->rr_protocol_discriminator = GSM48_PDISC_RR; |
| 370 | si5->skip_indicator = 0; |
| 371 | si5->system_information = GSM48_MT_RR_SYSINFO_5; |
Harald Welte | 64c07d2 | 2011-02-15 11:43:27 +0100 | [diff] [blame] | 372 | rc = generate_bcch_chan_list(si5->bcch_frequency_list, bts, 1); |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 373 | if (rc < 0) |
| 374 | return rc; |
| 375 | |
| 376 | /* 04.08 9.1.37: L2 Pseudo Length of 18 */ |
Harald Welte | e2d0d5f | 2009-12-19 21:26:54 +0100 | [diff] [blame] | 377 | return l2_plen; |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 378 | } |
| 379 | |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 380 | static int generate_si6(uint8_t *output, struct gsm_bts *bts) |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 381 | { |
Harald Welte | e2d0d5f | 2009-12-19 21:26:54 +0100 | [diff] [blame] | 382 | struct gsm48_system_information_type_6 *si6; |
| 383 | int l2_plen = 11; |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 384 | |
Holger Hans Peter Freyther | 17d81e2 | 2010-01-06 07:52:55 +0100 | [diff] [blame] | 385 | memset(output, GSM_MACBLOCK_PADDING, GSM_MACBLOCK_LEN); |
| 386 | |
Harald Welte | e2d0d5f | 2009-12-19 21:26:54 +0100 | [diff] [blame] | 387 | /* ip.access nanoBTS needs l2_plen!! */ |
Harald Welte | fd355a3 | 2011-03-04 13:41:31 +0100 | [diff] [blame] | 388 | switch (bts->type) { |
| 389 | case GSM_BTS_TYPE_NANOBTS: |
| 390 | case GSM_BTS_TYPE_HSL_FEMTO: |
Harald Welte | e2d0d5f | 2009-12-19 21:26:54 +0100 | [diff] [blame] | 391 | *output++ = (l2_plen << 2) | 1; |
| 392 | l2_plen++; |
Harald Welte | fd355a3 | 2011-03-04 13:41:31 +0100 | [diff] [blame] | 393 | break; |
| 394 | default: |
| 395 | break; |
Harald Welte | e2d0d5f | 2009-12-19 21:26:54 +0100 | [diff] [blame] | 396 | } |
| 397 | |
| 398 | si6 = (struct gsm48_system_information_type_6 *) output; |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 399 | |
| 400 | /* l2 pseudo length, not part of msg: 11 */ |
| 401 | si6->rr_protocol_discriminator = GSM48_PDISC_RR; |
| 402 | si6->skip_indicator = 0; |
| 403 | si6->system_information = GSM48_MT_RR_SYSINFO_6; |
| 404 | si6->cell_identity = htons(bts->cell_identity); |
Harald Welte | afedeab | 2010-03-04 10:55:40 +0100 | [diff] [blame] | 405 | gsm48_generate_lai(&si6->lai, bts->network->country_code, |
| 406 | bts->network->network_code, |
| 407 | bts->location_area_code); |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 408 | si6->cell_options = bts->si_common.cell_options; |
| 409 | si6->ncc_permitted = bts->si_common.ncc_permitted; |
| 410 | |
| 411 | /* SI6 Rest Octets: 10.5.2.35a: PCH / NCH info, VBS/VGCS options */ |
| 412 | |
Harald Welte | e2d0d5f | 2009-12-19 21:26:54 +0100 | [diff] [blame] | 413 | return l2_plen; |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 414 | } |
| 415 | |
| 416 | static struct gsm48_si13_info si13_default = { |
| 417 | .cell_opts = { |
Harald Welte | 8584918 | 2010-06-02 12:19:21 +0200 | [diff] [blame] | 418 | .nmo = GPRS_NMO_II, |
Harald Welte | a4b1665 | 2010-05-31 12:54:23 +0200 | [diff] [blame] | 419 | .t3168 = 2000, |
| 420 | .t3192 = 200, |
Harald Welte | 97a282b | 2010-03-14 15:37:43 +0800 | [diff] [blame] | 421 | .drx_timer_max = 3, |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 422 | .bs_cv_max = 15, |
Harald Welte | a4b1665 | 2010-05-31 12:54:23 +0200 | [diff] [blame] | 423 | .ext_info_present = 1, |
Harald Welte | da0586a | 2010-04-18 14:49:05 +0200 | [diff] [blame] | 424 | .ext_info = { |
| 425 | /* The values below are just guesses ! */ |
Harald Welte | a06fea0 | 2010-04-18 15:53:40 +0200 | [diff] [blame] | 426 | .egprs_supported = 0, |
Harald Welte | da0586a | 2010-04-18 14:49:05 +0200 | [diff] [blame] | 427 | .use_egprs_p_ch_req = 1, |
Harald Welte | a4b1665 | 2010-05-31 12:54:23 +0200 | [diff] [blame] | 428 | .bep_period = 5, |
Harald Welte | da0586a | 2010-04-18 14:49:05 +0200 | [diff] [blame] | 429 | .pfc_supported = 0, |
| 430 | .dtm_supported = 0, |
| 431 | .bss_paging_coordination = 0, |
| 432 | }, |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 433 | }, |
| 434 | .pwr_ctrl_pars = { |
| 435 | .alpha = 10, /* a = 1.0 */ |
Harald Welte | a4b1665 | 2010-05-31 12:54:23 +0200 | [diff] [blame] | 436 | .t_avg_w = 16, |
| 437 | .t_avg_t = 16, |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 438 | .pc_meas_chan = 0, /* downling measured on CCCH */ |
Harald Welte | a4b1665 | 2010-05-31 12:54:23 +0200 | [diff] [blame] | 439 | .n_avg_i = 8, |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 440 | }, |
Harald Welte | 97a282b | 2010-03-14 15:37:43 +0800 | [diff] [blame] | 441 | .bcch_change_mark = 1, |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 442 | .si_change_field = 0, |
| 443 | .pbcch_present = 0, |
| 444 | { |
| 445 | .no_pbcch = { |
Harald Welte | 97a282b | 2010-03-14 15:37:43 +0800 | [diff] [blame] | 446 | .rac = 0, /* needs to be patched */ |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 447 | .spgc_ccch_sup = 0, |
| 448 | .net_ctrl_ord = 0, |
Harald Welte | 97a282b | 2010-03-14 15:37:43 +0800 | [diff] [blame] | 449 | .prio_acc_thr = 6, |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 450 | }, |
| 451 | }, |
| 452 | }; |
| 453 | |
Holger Hans Peter Freyther | c42ad8b | 2011-04-18 17:04:00 +0200 | [diff] [blame] | 454 | static int generate_si13(uint8_t *output, struct gsm_bts *bts) |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 455 | { |
| 456 | struct gsm48_system_information_type_13 *si13 = |
| 457 | (struct gsm48_system_information_type_13 *) output; |
| 458 | int ret; |
| 459 | |
| 460 | memset(si13, GSM_MACBLOCK_PADDING, GSM_MACBLOCK_LEN); |
| 461 | |
| 462 | si13->header.rr_protocol_discriminator = GSM48_PDISC_RR; |
| 463 | si13->header.skip_indicator = 0; |
| 464 | si13->header.system_information = GSM48_MT_RR_SYSINFO_13; |
| 465 | |
Harald Welte | 97a282b | 2010-03-14 15:37:43 +0800 | [diff] [blame] | 466 | si13_default.no_pbcch.rac = bts->gprs.rac; |
| 467 | |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 468 | ret = rest_octets_si13(si13->rest_octets, &si13_default); |
| 469 | if (ret < 0) |
| 470 | return ret; |
| 471 | |
Holger Hans Peter Freyther | 1c6f394 | 2010-06-16 12:05:56 +0800 | [diff] [blame] | 472 | /* length is coded in bit 2 an up */ |
| 473 | si13->header.l2_plen = 0x01; |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 474 | |
Holger Hans Peter Freyther | 7ec448d | 2010-01-06 07:52:31 +0100 | [diff] [blame] | 475 | return sizeof (*si13) + ret; |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 476 | } |
| 477 | |
Harald Welte | 7401ae6 | 2010-06-15 16:44:12 +0200 | [diff] [blame] | 478 | typedef int (*gen_si_fn_t)(uint8_t *output, struct gsm_bts *bts); |
| 479 | |
| 480 | static const gen_si_fn_t gen_si_fn[_MAX_SYSINFO_TYPE] = { |
| 481 | [SYSINFO_TYPE_1] = &generate_si1, |
| 482 | [SYSINFO_TYPE_2] = &generate_si2, |
| 483 | [SYSINFO_TYPE_3] = &generate_si3, |
| 484 | [SYSINFO_TYPE_4] = &generate_si4, |
| 485 | [SYSINFO_TYPE_5] = &generate_si5, |
| 486 | [SYSINFO_TYPE_6] = &generate_si6, |
| 487 | [SYSINFO_TYPE_13] = &generate_si13, |
| 488 | }; |
| 489 | |
Harald Welte | 7401ae6 | 2010-06-15 16:44:12 +0200 | [diff] [blame] | 490 | int gsm_generate_si(struct gsm_bts *bts, enum osmo_sysinfo_type si_type) |
| 491 | { |
| 492 | gen_si_fn_t gen_si; |
| 493 | |
Harald Welte | 4511d89 | 2010-04-18 15:51:20 +0200 | [diff] [blame] | 494 | switch (bts->gprs.mode) { |
| 495 | case BTS_GPRS_EGPRS: |
Harald Welte | a06fea0 | 2010-04-18 15:53:40 +0200 | [diff] [blame] | 496 | si13_default.cell_opts.ext_info_present = 1; |
| 497 | si13_default.cell_opts.ext_info.egprs_supported = 1; |
| 498 | /* fallthrough */ |
Harald Welte | 4511d89 | 2010-04-18 15:51:20 +0200 | [diff] [blame] | 499 | case BTS_GPRS_GPRS: |
| 500 | si_info.gprs_ind.present = 1; |
| 501 | break; |
| 502 | case BTS_GPRS_NONE: |
| 503 | si_info.gprs_ind.present = 0; |
| 504 | break; |
| 505 | } |
Harald Welte | 1f89329 | 2010-03-14 23:46:48 +0800 | [diff] [blame] | 506 | |
Sylvain Munaut | e0b06b0 | 2010-11-28 18:17:28 +0100 | [diff] [blame] | 507 | memcpy(&si_info.selection_params, |
| 508 | &bts->si_common.cell_ro_sel_par, |
| 509 | sizeof(struct gsm48_si_selection_params)); |
| 510 | |
Harald Welte | 7401ae6 | 2010-06-15 16:44:12 +0200 | [diff] [blame] | 511 | gen_si = gen_si_fn[si_type]; |
| 512 | if (!gen_si) |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 513 | return -EINVAL; |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 514 | |
Harald Welte | 7401ae6 | 2010-06-15 16:44:12 +0200 | [diff] [blame] | 515 | return gen_si(bts->si_buf[si_type], bts); |
Harald Welte | a43f789 | 2009-12-01 18:04:30 +0530 | [diff] [blame] | 516 | } |