Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1 | /* GSM Radio Signalling Link messages on the A-bis interface |
| 2 | * 3GPP TS 08.58 version 8.6.0 Release 1999 / ETSI TS 100 596 V8.6.0 */ |
| 3 | |
Harald Welte | 8f5e239 | 2009-02-03 12:57:37 +0000 | [diff] [blame] | 4 | /* (C) 2008-2009 by Harald Welte <laforge@gnumonks.org> |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 5 | * |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 6 | * All Rights Reserved |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 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 |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License along |
| 19 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 20 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 21 | * |
| 22 | */ |
| 23 | |
| 24 | #include <stdio.h> |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 25 | #include <stdlib.h> |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 26 | #include <errno.h> |
| 27 | #include <sys/types.h> |
Harald Welte | 7509926 | 2009-02-16 21:12:08 +0000 | [diff] [blame] | 28 | #include <netinet/in.h> |
Harald Welte | 167df88 | 2009-02-17 14:35:45 +0000 | [diff] [blame] | 29 | #include <arpa/inet.h> |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 30 | |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 31 | #include <openbsc/gsm_data.h> |
| 32 | #include <openbsc/gsm_04_08.h> |
| 33 | #include <openbsc/abis_rsl.h> |
| 34 | #include <openbsc/chan_alloc.h> |
| 35 | #include <openbsc/debug.h> |
| 36 | #include <openbsc/tlv.h> |
Holger Freyther | 392209c | 2009-02-10 00:06:19 +0000 | [diff] [blame] | 37 | #include <openbsc/paging.h> |
Harald Welte | 167df88 | 2009-02-17 14:35:45 +0000 | [diff] [blame] | 38 | #include <openbsc/signal.h> |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 39 | |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 40 | #define RSL_ALLOC_SIZE 1024 |
| 41 | #define RSL_ALLOC_HEADROOM 128 |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 42 | |
Holger Freyther | 3b72a89 | 2009-02-04 00:31:39 +0000 | [diff] [blame] | 43 | #define MAX(a, b) (a) >= (b) ? (a) : (b) |
| 44 | |
Harald Welte | 7509926 | 2009-02-16 21:12:08 +0000 | [diff] [blame] | 45 | static const struct tlv_definition rsl_att_tlvdef = { |
| 46 | .def = { |
| 47 | [RSL_IE_CHAN_NR] = { TLV_TYPE_TV }, |
| 48 | [RSL_IE_LINK_IDENT] = { TLV_TYPE_TV }, |
| 49 | [RSL_IE_ACT_TYPE] = { TLV_TYPE_TV }, |
| 50 | [RSL_IE_BS_POWER] = { TLV_TYPE_TV }, |
| 51 | [RSL_IE_CHAN_IDENT] = { TLV_TYPE_TLV }, |
| 52 | [RSL_IE_CHAN_MODE] = { TLV_TYPE_TLV }, |
| 53 | [RSL_IE_ENCR_INFO] = { TLV_TYPE_TLV }, |
| 54 | [RSL_IE_FRAME_NUMBER] = { TLV_TYPE_FIXED, 2 }, |
| 55 | [RSL_IE_HANDO_REF] = { TLV_TYPE_TV }, |
| 56 | [RSL_IE_L1_INFO] = { TLV_TYPE_FIXED, 2 }, |
| 57 | [RSL_IE_L3_INFO] = { TLV_TYPE_TL16V }, |
| 58 | [RSL_IE_MS_IDENTITY] = { TLV_TYPE_TLV }, |
| 59 | [RSL_IE_MS_POWER] = { TLV_TYPE_TV }, |
| 60 | [RSL_IE_PAGING_GROUP] = { TLV_TYPE_TV }, |
| 61 | [RSL_IE_PAGING_LOAD] = { TLV_TYPE_FIXED, 2 }, |
| 62 | [RSL_IE_PYHS_CONTEXT] = { TLV_TYPE_TLV }, |
| 63 | [RSL_IE_ACCESS_DELAY] = { TLV_TYPE_TV }, |
| 64 | [RSL_IE_RACH_LOAD] = { TLV_TYPE_TLV }, |
| 65 | [RSL_IE_REQ_REFERENCE] = { TLV_TYPE_FIXED, 3 }, |
| 66 | [RSL_IE_RELEASE_MODE] = { TLV_TYPE_TV }, |
| 67 | [RSL_IE_RESOURCE_INFO] = { TLV_TYPE_TLV }, |
| 68 | [RSL_IE_RLM_CAUSE] = { TLV_TYPE_TLV }, |
| 69 | [RSL_IE_STARTNG_TIME] = { TLV_TYPE_FIXED, 2 }, |
| 70 | [RSL_IE_TIMING_ADVANCE] = { TLV_TYPE_TV }, |
| 71 | [RSL_IE_UPLINK_MEAS] = { TLV_TYPE_TLV }, |
| 72 | [RSL_IE_CAUSE] = { TLV_TYPE_TLV }, |
| 73 | [RSL_IE_MEAS_RES_NR] = { TLV_TYPE_TV }, |
| 74 | [RSL_IE_MSG_ID] = { TLV_TYPE_TV }, |
| 75 | [RSL_IE_SYSINFO_TYPE] = { TLV_TYPE_TV }, |
| 76 | [RSL_IE_MS_POWER_PARAM] = { TLV_TYPE_TLV }, |
| 77 | [RSL_IE_BS_POWER_PARAM] = { TLV_TYPE_TLV }, |
| 78 | [RSL_IE_PREPROC_PARAM] = { TLV_TYPE_TLV }, |
| 79 | [RSL_IE_PREPROC_MEAS] = { TLV_TYPE_TLV }, |
| 80 | [RSL_IE_IMM_ASS_INFO] = { TLV_TYPE_TLV }, |
| 81 | [RSL_IE_SMSCB_INFO] = { TLV_TYPE_FIXED, 23 }, |
| 82 | [RSL_IE_MS_TIMING_OFFSET] = { TLV_TYPE_TV }, |
| 83 | [RSL_IE_ERR_MSG] = { TLV_TYPE_TLV }, |
| 84 | [RSL_IE_FULL_BCCH_INFO] = { TLV_TYPE_TLV }, |
| 85 | [RSL_IE_CHAN_NEEDED] = { TLV_TYPE_TV }, |
| 86 | [RSL_IE_CB_CMD_TYPE] = { TLV_TYPE_TV }, |
| 87 | [RSL_IE_SMSCB_MSG] = { TLV_TYPE_TLV }, |
| 88 | [RSL_IE_FULL_IMM_ASS_INFO] = { TLV_TYPE_TLV }, |
| 89 | [RSL_IE_SACCH_INFO] = { TLV_TYPE_TLV }, |
| 90 | [RSL_IE_CBCH_LOAD_INFO] = { TLV_TYPE_TV }, |
| 91 | [RSL_IE_SMSCB_CHAN_INDICATOR] = { TLV_TYPE_TV }, |
| 92 | [RSL_IE_GROUP_CALL_REF] = { TLV_TYPE_TLV }, |
| 93 | [RSL_IE_CHAN_DESC] = { TLV_TYPE_TLV }, |
| 94 | [RSL_IE_NCH_DRX_INFO] = { TLV_TYPE_TLV }, |
| 95 | [RSL_IE_CMD_INDICATOR] = { TLV_TYPE_TLV }, |
| 96 | [RSL_IE_EMLPP_PRIO] = { TLV_TYPE_TV }, |
| 97 | [RSL_IE_UIC] = { TLV_TYPE_TLV }, |
| 98 | [RSL_IE_MAIN_CHAN_REF] = { TLV_TYPE_TV }, |
| 99 | [RSL_IE_MR_CONFIG] = { TLV_TYPE_TLV }, |
| 100 | [RSL_IE_MR_CONTROL] = { TLV_TYPE_TV }, |
| 101 | [RSL_IE_SUP_CODEC_TYPES] = { TLV_TYPE_TLV }, |
| 102 | [RSL_IE_CODEC_CONFIG] = { TLV_TYPE_TLV }, |
| 103 | [RSL_IE_RTD] = { TLV_TYPE_TV }, |
| 104 | [RSL_IE_TFO_STATUS] = { TLV_TYPE_TV }, |
| 105 | [RSL_IE_LLP_APDU] = { TLV_TYPE_TLV }, |
| 106 | [RSL_IE_IPAC_REMOTE_IP] = { TLV_TYPE_FIXED, 4 }, |
| 107 | [RSL_IE_IPAC_REMOTE_PORT] = { TLV_TYPE_FIXED, 2 }, |
| 108 | [RSL_IE_IPAC_LOCAL_IP] = { TLV_TYPE_FIXED, 4 }, |
| 109 | [RSL_IE_IPAC_LOCAL_PORT] = { TLV_TYPE_FIXED, 2 }, |
| 110 | [0xf4] = { TLV_TYPE_TV }, |
| 111 | [0xf8] = { TLV_TYPE_FIXED, 2 }, |
| 112 | [0xfc] = { TLV_TYPE_TV }, |
| 113 | }, |
| 114 | }; |
| 115 | #define rsl_tlv_parse(dec, buf, len) tlv_parse(dec, &rsl_att_tlvdef, buf, len) |
| 116 | |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 117 | static u_int8_t mdisc_by_msgtype(u_int8_t msg_type) |
| 118 | { |
| 119 | /* mask off the transparent bit ? */ |
| 120 | msg_type &= 0xfe; |
| 121 | |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 122 | if ((msg_type & 0xf0) == 0x00) |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 123 | return ABIS_RSL_MDISC_RLL; |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 124 | if ((msg_type & 0xf0) == 0x10) { |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 125 | if (msg_type >= 0x19 && msg_type <= 0x22) |
| 126 | return ABIS_RSL_MDISC_TRX; |
| 127 | else |
| 128 | return ABIS_RSL_MDISC_COM_CHAN; |
| 129 | } |
Harald Welte | 2d5b638 | 2008-12-27 19:46:06 +0000 | [diff] [blame] | 130 | if ((msg_type & 0xe0) == 0x20) |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 131 | return ABIS_RSL_MDISC_DED_CHAN; |
| 132 | |
| 133 | return ABIS_RSL_MDISC_LOC; |
| 134 | } |
| 135 | |
| 136 | static inline void init_dchan_hdr(struct abis_rsl_dchan_hdr *dh, |
| 137 | u_int8_t msg_type) |
| 138 | { |
| 139 | dh->c.msg_discr = mdisc_by_msgtype(msg_type); |
| 140 | dh->c.msg_type = msg_type; |
| 141 | dh->ie_chan = RSL_IE_CHAN_NR; |
| 142 | } |
| 143 | |
| 144 | static inline void init_llm_hdr(struct abis_rsl_rll_hdr *dh, |
| 145 | u_int8_t msg_type) |
| 146 | { |
| 147 | /* dh->c.msg_discr = mdisc_by_msgtype(msg_type); */ |
| 148 | dh->c.msg_discr = ABIS_RSL_MDISC_RLL; |
| 149 | dh->c.msg_type = msg_type; |
| 150 | dh->ie_chan = RSL_IE_CHAN_NR; |
| 151 | dh->ie_link_id = RSL_IE_LINK_IDENT; |
| 152 | } |
| 153 | |
| 154 | |
| 155 | /* encode channel number as per Section 9.3.1 */ |
| 156 | u_int8_t rsl_enc_chan_nr(u_int8_t type, u_int8_t subch, u_int8_t timeslot) |
| 157 | { |
| 158 | u_int8_t ret; |
| 159 | |
| 160 | ret = (timeslot & 0x07) | type; |
| 161 | |
| 162 | switch (type) { |
| 163 | case RSL_CHAN_Lm_ACCHs: |
| 164 | subch &= 0x01; |
| 165 | break; |
| 166 | case RSL_CHAN_SDCCH4_ACCH: |
| 167 | subch &= 0x07; |
| 168 | break; |
| 169 | case RSL_CHAN_SDCCH8_ACCH: |
| 170 | subch &= 0x07; |
| 171 | break; |
| 172 | default: |
| 173 | /* no subchannels allowed */ |
| 174 | subch = 0x00; |
| 175 | break; |
| 176 | } |
| 177 | ret |= (subch << 3); |
| 178 | |
| 179 | return ret; |
| 180 | } |
| 181 | |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 182 | /* determine logical channel based on TRX and channel number IE */ |
| 183 | struct gsm_lchan *lchan_lookup(struct gsm_bts_trx *trx, u_int8_t chan_nr) |
| 184 | { |
| 185 | struct gsm_lchan *lchan; |
| 186 | u_int8_t ts_nr = chan_nr & 0x07; |
| 187 | u_int8_t cbits = chan_nr >> 3; |
| 188 | u_int8_t lch_idx; |
| 189 | struct gsm_bts_trx_ts *ts = &trx->ts[ts_nr]; |
| 190 | |
| 191 | if (cbits == 0x01) { |
| 192 | lch_idx = 0; /* TCH/F */ |
| 193 | if (ts->pchan != GSM_PCHAN_TCH_F) |
| 194 | fprintf(stderr, "chan_nr=0x%02x but pchan=%u\n", |
| 195 | chan_nr, ts->pchan); |
| 196 | } else if ((cbits & 0x1e) == 0x02) { |
| 197 | lch_idx = cbits & 0x1; /* TCH/H */ |
| 198 | if (ts->pchan != GSM_PCHAN_TCH_H) |
| 199 | fprintf(stderr, "chan_nr=0x%02x but pchan=%u\n", |
| 200 | chan_nr, ts->pchan); |
| 201 | } else if ((cbits & 0x1c) == 0x04) { |
| 202 | lch_idx = cbits & 0x3; /* SDCCH/4 */ |
| 203 | if (ts->pchan != GSM_PCHAN_CCCH_SDCCH4) |
| 204 | fprintf(stderr, "chan_nr=0x%02x but pchan=%u\n", |
| 205 | chan_nr, ts->pchan); |
| 206 | } else if ((cbits & 0x18) == 0x08) { |
| 207 | lch_idx = cbits & 0x7; /* SDCCH/8 */ |
| 208 | if (ts->pchan != GSM_PCHAN_SDCCH8_SACCH8C) |
| 209 | fprintf(stderr, "chan_nr=0x%02x but pchan=%u\n", |
| 210 | chan_nr, ts->pchan); |
| 211 | } else if (cbits == 0x10 || cbits == 0x11 || cbits == 0x12) { |
| 212 | lch_idx = 0; |
| 213 | if (ts->pchan != GSM_PCHAN_CCCH && |
| 214 | ts->pchan != GSM_PCHAN_CCCH_SDCCH4) |
| 215 | fprintf(stderr, "chan_nr=0x%02x but pchan=%u\n", |
| 216 | chan_nr, ts->pchan); |
| 217 | /* FIXME: we should not return first sdcch4 !!! */ |
| 218 | } else { |
| 219 | fprintf(stderr, "unknown chan_nr=0x%02x\n", chan_nr); |
| 220 | return NULL; |
| 221 | } |
| 222 | |
| 223 | lchan = &ts->lchan[lch_idx]; |
| 224 | |
| 225 | return lchan; |
| 226 | } |
| 227 | |
| 228 | u_int8_t lchan2chan_nr(struct gsm_lchan *lchan) |
| 229 | { |
| 230 | struct gsm_bts_trx_ts *ts = lchan->ts; |
| 231 | u_int8_t cbits, chan_nr; |
| 232 | |
| 233 | switch (ts->pchan) { |
| 234 | case GSM_PCHAN_TCH_F: |
| 235 | cbits = 0x01; |
| 236 | break; |
| 237 | case GSM_PCHAN_TCH_H: |
| 238 | cbits = 0x02; |
| 239 | cbits += lchan->nr; |
| 240 | break; |
| 241 | case GSM_PCHAN_CCCH_SDCCH4: |
| 242 | cbits = 0x04; |
| 243 | cbits += lchan->nr; |
| 244 | break; |
| 245 | case GSM_PCHAN_SDCCH8_SACCH8C: |
| 246 | cbits = 0x08; |
| 247 | cbits += lchan->nr; |
| 248 | break; |
| 249 | default: |
| 250 | case GSM_PCHAN_CCCH: |
| 251 | cbits = 0x10; |
| 252 | break; |
| 253 | } |
| 254 | |
| 255 | chan_nr = (cbits << 3) | (ts->nr & 0x7); |
| 256 | |
| 257 | return chan_nr; |
| 258 | } |
| 259 | |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 260 | /* As per TS 03.03 Section 2.2, the IMSI has 'not more than 15 digits' */ |
| 261 | u_int64_t str_to_imsi(const char *imsi_str) |
| 262 | { |
| 263 | u_int64_t ret; |
| 264 | |
| 265 | ret = strtoull(imsi_str, NULL, 10); |
| 266 | |
| 267 | return ret; |
| 268 | } |
| 269 | |
| 270 | /* Table 5 Clause 7 TS 05.02 */ |
| 271 | unsigned int n_pag_blocks(int bs_ccch_sdcch_comb, unsigned int bs_ag_blks_res) |
| 272 | { |
| 273 | if (!bs_ccch_sdcch_comb) |
| 274 | return 9 - bs_ag_blks_res; |
| 275 | else |
| 276 | return 3 - bs_ag_blks_res; |
| 277 | } |
| 278 | |
| 279 | /* Chapter 6.5.2 of TS 05.02 */ |
| 280 | unsigned int get_ccch_group(u_int64_t imsi, unsigned int bs_cc_chans, |
| 281 | unsigned int n_pag_blocks) |
| 282 | { |
| 283 | return (imsi % 1000) % (bs_cc_chans * n_pag_blocks) / n_pag_blocks; |
| 284 | } |
| 285 | |
| 286 | /* Chapter 6.5.2 of TS 05.02 */ |
| 287 | unsigned int get_paging_group(u_int64_t imsi, unsigned int bs_cc_chans, |
| 288 | int n_pag_blocks) |
| 289 | { |
| 290 | return (imsi % 1000) % (bs_cc_chans * n_pag_blocks) % n_pag_blocks; |
| 291 | } |
| 292 | |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 293 | static struct msgb *rsl_msgb_alloc(void) |
| 294 | { |
| 295 | return msgb_alloc_headroom(RSL_ALLOC_SIZE, RSL_ALLOC_HEADROOM); |
| 296 | } |
| 297 | |
Harald Welte | 362322e | 2009-02-15 14:36:38 +0000 | [diff] [blame] | 298 | #define MACBLOCK_SIZE 23 |
| 299 | static void pad_macblock(u_int8_t *out, const u_int8_t *in, int len) |
| 300 | { |
| 301 | memcpy(out, in, len); |
| 302 | |
| 303 | if (len < MACBLOCK_SIZE) |
| 304 | memset(out+len, 0x2b, MACBLOCK_SIZE-len); |
| 305 | } |
| 306 | |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 307 | /* Send a BCCH_INFO message as per Chapter 8.5.1 */ |
Harald Welte | e79769b | 2009-02-07 00:48:17 +0000 | [diff] [blame] | 308 | int rsl_bcch_info(struct gsm_bts_trx *trx, u_int8_t type, |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 309 | const u_int8_t *data, int len) |
| 310 | { |
| 311 | struct abis_rsl_dchan_hdr *dh; |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 312 | struct msgb *msg = rsl_msgb_alloc(); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 313 | |
| 314 | dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof*dh); |
| 315 | init_dchan_hdr(dh, RSL_MT_BCCH_INFO); |
| 316 | dh->chan_nr = RSL_CHAN_BCCH; |
| 317 | |
| 318 | msgb_tv_put(msg, RSL_IE_SYSINFO_TYPE, type); |
| 319 | msgb_tlv_put(msg, RSL_IE_FULL_BCCH_INFO, len, data); |
| 320 | |
Harald Welte | e79769b | 2009-02-07 00:48:17 +0000 | [diff] [blame] | 321 | msg->trx = trx; |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 322 | |
| 323 | return abis_rsl_sendmsg(msg); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 324 | } |
| 325 | |
Harald Welte | e79769b | 2009-02-07 00:48:17 +0000 | [diff] [blame] | 326 | int rsl_sacch_filling(struct gsm_bts_trx *trx, u_int8_t type, |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 327 | const u_int8_t *data, int len) |
| 328 | { |
| 329 | struct abis_rsl_common_hdr *ch; |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 330 | struct msgb *msg = rsl_msgb_alloc(); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 331 | |
| 332 | ch = (struct abis_rsl_common_hdr *) msgb_put(msg, sizeof(*ch)); |
| 333 | ch->msg_discr = ABIS_RSL_MDISC_TRX; |
| 334 | ch->msg_type = RSL_MT_SACCH_FILL; |
| 335 | |
| 336 | msgb_tv_put(msg, RSL_IE_SYSINFO_TYPE, type); |
Harald Welte | 702d870 | 2008-12-26 20:25:35 +0000 | [diff] [blame] | 337 | msgb_tl16v_put(msg, RSL_IE_L3_INFO, len, data); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 338 | |
Harald Welte | e79769b | 2009-02-07 00:48:17 +0000 | [diff] [blame] | 339 | msg->trx = trx; |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 340 | |
| 341 | return abis_rsl_sendmsg(msg); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 342 | } |
| 343 | |
| 344 | /* Chapter 8.4.1 */ |
Harald Welte | e79769b | 2009-02-07 00:48:17 +0000 | [diff] [blame] | 345 | int rsl_chan_activate(struct gsm_bts_trx *trx, u_int8_t chan_nr, |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 346 | u_int8_t act_type, |
| 347 | struct rsl_ie_chan_mode *chan_mode, |
| 348 | struct rsl_ie_chan_ident *chan_ident, |
| 349 | u_int8_t bs_power, u_int8_t ms_power, |
| 350 | u_int8_t ta) |
| 351 | { |
| 352 | struct abis_rsl_dchan_hdr *dh; |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 353 | struct msgb *msg = rsl_msgb_alloc(); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 354 | |
| 355 | dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh)); |
| 356 | init_dchan_hdr(dh, RSL_MT_CHAN_ACTIV); |
| 357 | dh->chan_nr = chan_nr; |
| 358 | |
| 359 | msgb_tv_put(msg, RSL_IE_ACT_TYPE, act_type); |
| 360 | /* For compatibility with Phase 1 */ |
| 361 | msgb_tlv_put(msg, RSL_IE_CHAN_MODE, sizeof(*chan_mode), |
| 362 | (u_int8_t *) chan_mode); |
| 363 | msgb_tlv_put(msg, RSL_IE_CHAN_IDENT, 4, |
Harald Welte | 702d870 | 2008-12-26 20:25:35 +0000 | [diff] [blame] | 364 | (u_int8_t *) chan_ident); |
Harald Welte | 702d870 | 2008-12-26 20:25:35 +0000 | [diff] [blame] | 365 | #if 0 |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 366 | msgb_tlv_put(msg, RSL_IE_ENCR_INFO, 1, |
| 367 | (u_int8_t *) &encr_info); |
Harald Welte | 702d870 | 2008-12-26 20:25:35 +0000 | [diff] [blame] | 368 | #endif |
Harald Welte | d4c9bf3 | 2009-02-15 16:56:18 +0000 | [diff] [blame] | 369 | msgb_tv_put(msg, RSL_IE_BS_POWER, bs_power); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 370 | msgb_tv_put(msg, RSL_IE_MS_POWER, ms_power); |
| 371 | msgb_tv_put(msg, RSL_IE_TIMING_ADVANCE, ta); |
| 372 | |
Harald Welte | e79769b | 2009-02-07 00:48:17 +0000 | [diff] [blame] | 373 | msg->trx = trx; |
| 374 | |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 375 | return abis_rsl_sendmsg(msg); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 376 | } |
| 377 | |
| 378 | #define TSC 7 |
| 379 | |
Harald Welte | 8f5e239 | 2009-02-03 12:57:37 +0000 | [diff] [blame] | 380 | int rsl_chan_activate_lchan(struct gsm_lchan *lchan, u_int8_t act_type, |
| 381 | u_int8_t ta) |
Harald Welte | 4b63454 | 2008-12-27 01:55:51 +0000 | [diff] [blame] | 382 | { |
| 383 | struct abis_rsl_dchan_hdr *dh; |
| 384 | struct msgb *msg = rsl_msgb_alloc(); |
Harald Welte | 4b63454 | 2008-12-27 01:55:51 +0000 | [diff] [blame] | 385 | |
| 386 | u_int8_t chan_nr = lchan2chan_nr(lchan); |
| 387 | u_int16_t arfcn = lchan->ts->trx->arfcn; |
| 388 | struct rsl_ie_chan_mode cm; |
| 389 | struct rsl_ie_chan_ident ci; |
| 390 | |
| 391 | /* FIXME: what to do with data calls ? */ |
| 392 | cm.dtx_dtu = 0x00; |
| 393 | switch (lchan->type) { |
| 394 | case GSM_LCHAN_SDCCH: |
| 395 | cm.spd_ind = RSL_CMOD_SPD_SIGN; |
| 396 | cm.chan_rt = RSL_CMOD_CRT_SDCCH; |
| 397 | cm.chan_rate = 0x00; |
| 398 | break; |
| 399 | case GSM_LCHAN_TCH_F: |
Harald Welte | da78376 | 2009-02-18 03:29:53 +0000 | [diff] [blame] | 400 | /* TCH/F are always activated in signalling mode first */ |
| 401 | cm.spd_ind = RSL_CMOD_SPD_SIGN; |
Harald Welte | 4b63454 | 2008-12-27 01:55:51 +0000 | [diff] [blame] | 402 | cm.chan_rt = RSL_CMOD_CRT_TCH_Bm; |
Harald Welte | da78376 | 2009-02-18 03:29:53 +0000 | [diff] [blame] | 403 | cm.chan_rate = 0x00; |
Harald Welte | 4b63454 | 2008-12-27 01:55:51 +0000 | [diff] [blame] | 404 | break; |
Holger Freyther | ca362a6 | 2009-01-04 21:05:01 +0000 | [diff] [blame] | 405 | case GSM_LCHAN_TCH_H: |
Harald Welte | 8f5e239 | 2009-02-03 12:57:37 +0000 | [diff] [blame] | 406 | DEBUGP(DRSL, "Unimplemented TCH_H activation\n"); |
Holger Freyther | ca362a6 | 2009-01-04 21:05:01 +0000 | [diff] [blame] | 407 | return -1; |
| 408 | case GSM_LCHAN_UNKNOWN: |
| 409 | case GSM_LCHAN_NONE: |
| 410 | return -1; |
Harald Welte | 4b63454 | 2008-12-27 01:55:51 +0000 | [diff] [blame] | 411 | } |
| 412 | |
| 413 | ci.chan_desc.iei = 0x64; |
| 414 | ci.chan_desc.chan_nr = chan_nr; |
| 415 | ci.chan_desc.oct3 = (TSC << 5) | ((arfcn & 0x3ff) >> 8); |
| 416 | ci.chan_desc.oct4 = arfcn & 0xff; |
| 417 | |
| 418 | dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh)); |
| 419 | init_dchan_hdr(dh, RSL_MT_CHAN_ACTIV); |
| 420 | dh->chan_nr = chan_nr; |
| 421 | |
| 422 | msgb_tv_put(msg, RSL_IE_ACT_TYPE, act_type); |
| 423 | /* For compatibility with Phase 1 */ |
| 424 | msgb_tlv_put(msg, RSL_IE_CHAN_MODE, sizeof(cm), |
| 425 | (u_int8_t *) &cm); |
| 426 | msgb_tlv_put(msg, RSL_IE_CHAN_IDENT, 4, |
| 427 | (u_int8_t *) &ci); |
Harald Welte | 4b63454 | 2008-12-27 01:55:51 +0000 | [diff] [blame] | 428 | #if 0 |
| 429 | msgb_tlv_put(msg, RSL_IE_ENCR_INFO, 1, |
| 430 | (u_int8_t *) &encr_info); |
Harald Welte | 4b63454 | 2008-12-27 01:55:51 +0000 | [diff] [blame] | 431 | #endif |
Harald Welte | d4c9bf3 | 2009-02-15 16:56:18 +0000 | [diff] [blame] | 432 | msgb_tv_put(msg, RSL_IE_BS_POWER, lchan->bs_power); |
| 433 | msgb_tv_put(msg, RSL_IE_MS_POWER, lchan->ms_power); |
Harald Welte | 4b63454 | 2008-12-27 01:55:51 +0000 | [diff] [blame] | 434 | msgb_tv_put(msg, RSL_IE_TIMING_ADVANCE, ta); |
| 435 | |
Harald Welte | e79769b | 2009-02-07 00:48:17 +0000 | [diff] [blame] | 436 | msg->trx = lchan->ts->trx; |
| 437 | |
Harald Welte | 4b63454 | 2008-12-27 01:55:51 +0000 | [diff] [blame] | 438 | return abis_rsl_sendmsg(msg); |
| 439 | } |
| 440 | |
Harald Welte | da78376 | 2009-02-18 03:29:53 +0000 | [diff] [blame] | 441 | /* Chapter 8.4.9 */ |
| 442 | int rsl_chan_mode_modify_req(struct gsm_lchan *lchan) |
| 443 | { |
| 444 | struct abis_rsl_dchan_hdr *dh; |
| 445 | struct msgb *msg = rsl_msgb_alloc(); |
| 446 | |
| 447 | u_int8_t chan_nr = lchan2chan_nr(lchan); |
| 448 | struct rsl_ie_chan_mode cm; |
| 449 | |
| 450 | /* FIXME: what to do with data calls ? */ |
| 451 | cm.dtx_dtu = 0x00; |
| 452 | switch (lchan->type) { |
| 453 | case GSM_LCHAN_TCH_F: |
| 454 | cm.spd_ind = RSL_CMOD_SPD_SPEECH; |
| 455 | cm.chan_rt = RSL_CMOD_CRT_TCH_Bm; |
| 456 | cm.chan_rate = 0x11; /* speech coding alg version 2*/ |
| 457 | break; |
| 458 | default: |
| 459 | DEBUGP(DRSL, "Unimplemented channel modification\n"); |
| 460 | return -1; |
| 461 | } |
| 462 | |
| 463 | dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh)); |
| 464 | init_dchan_hdr(dh, RSL_MT_MODE_MODIFY_REQ); |
| 465 | dh->chan_nr = chan_nr; |
| 466 | |
| 467 | msgb_tlv_put(msg, RSL_IE_CHAN_MODE, sizeof(cm), |
| 468 | (u_int8_t *) &cm); |
| 469 | #if 0 |
| 470 | msgb_tlv_put(msg, RSL_IE_ENCR_INFO, 1, |
| 471 | (u_int8_t *) &encr_info); |
| 472 | #endif |
| 473 | |
| 474 | msg->trx = lchan->ts->trx; |
| 475 | |
| 476 | return abis_rsl_sendmsg(msg); |
| 477 | } |
| 478 | |
Holger Freyther | 36cbeff | 2008-12-30 19:15:20 +0000 | [diff] [blame] | 479 | /* Chapter 9.1.7 of 04.08 */ |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 480 | int rsl_chan_release(struct gsm_lchan *lchan) |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 481 | { |
| 482 | struct abis_rsl_dchan_hdr *dh; |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 483 | struct msgb *msg = rsl_msgb_alloc(); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 484 | |
| 485 | dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh)); |
| 486 | init_dchan_hdr(dh, RSL_MT_RF_CHAN_REL); |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 487 | dh->chan_nr = lchan2chan_nr(lchan); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 488 | |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 489 | msg->lchan = lchan; |
| 490 | msg->trx = lchan->ts->trx; |
| 491 | |
Harald Welte | 2d5b638 | 2008-12-27 19:46:06 +0000 | [diff] [blame] | 492 | DEBUGP(DRSL, "Channel Release CMD, chan_nr=0x%02x\n", dh->chan_nr); |
| 493 | |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 494 | return abis_rsl_sendmsg(msg); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 495 | } |
| 496 | |
| 497 | int rsl_paging_cmd(struct gsm_bts *bts, u_int8_t paging_group, u_int8_t len, |
| 498 | u_int8_t *ms_ident, u_int8_t chan_needed) |
| 499 | { |
| 500 | struct abis_rsl_dchan_hdr *dh; |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 501 | struct msgb *msg = rsl_msgb_alloc(); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 502 | |
| 503 | dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh)); |
| 504 | init_dchan_hdr(dh, RSL_MT_PAGING_CMD); |
| 505 | dh->chan_nr = RSL_CHAN_PCH_AGCH; |
| 506 | |
| 507 | msgb_tv_put(msg, RSL_IE_PAGING_GROUP, paging_group); |
Harald Welte | 255539c | 2008-12-28 02:26:27 +0000 | [diff] [blame] | 508 | msgb_tlv_put(msg, RSL_IE_MS_IDENTITY, len-2, ms_ident+2); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 509 | msgb_tv_put(msg, RSL_IE_CHAN_NEEDED, chan_needed); |
| 510 | |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 511 | msg->trx = bts->c0; |
| 512 | |
| 513 | return abis_rsl_sendmsg(msg); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 514 | } |
| 515 | |
Holger Freyther | 7448a53 | 2009-01-04 20:18:23 +0000 | [diff] [blame] | 516 | int rsl_paging_cmd_subscr(struct gsm_bts *bts, u_int8_t chan_need, |
| 517 | struct gsm_subscriber *subscr) |
| 518 | { |
Holger Freyther | ca362a6 | 2009-01-04 21:05:01 +0000 | [diff] [blame] | 519 | #if 0 |
Holger Freyther | 7448a53 | 2009-01-04 20:18:23 +0000 | [diff] [blame] | 520 | u_int8_t mi[128]; |
| 521 | unsigned int mi_len; |
| 522 | u_int8_t paging_group; |
Holger Freyther | ca362a6 | 2009-01-04 21:05:01 +0000 | [diff] [blame] | 523 | #endif |
Holger Freyther | 7448a53 | 2009-01-04 20:18:23 +0000 | [diff] [blame] | 524 | |
| 525 | return -1; |
| 526 | } |
| 527 | |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 528 | int imsi_str2bcd(u_int8_t *bcd_out, const char *str_in) |
| 529 | { |
| 530 | int i, len = strlen(str_in); |
| 531 | |
| 532 | for (i = 0; i < len; i++) { |
| 533 | int num = str_in[i] - 0x30; |
| 534 | if (num < 0 || num > 9) |
| 535 | return -1; |
| 536 | if (i % 2 == 0) |
| 537 | bcd_out[i/2] = num; |
| 538 | else |
| 539 | bcd_out[i/2] |= (num << 4); |
| 540 | } |
| 541 | |
| 542 | return 0; |
| 543 | } |
| 544 | |
Harald Welte | 702d870 | 2008-12-26 20:25:35 +0000 | [diff] [blame] | 545 | /* Chapter 8.5.6 */ |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 546 | int rsl_imm_assign_cmd(struct gsm_bts *bts, u_int8_t len, u_int8_t *val) |
| 547 | { |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 548 | struct msgb *msg = rsl_msgb_alloc(); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 549 | struct abis_rsl_dchan_hdr *dh; |
Harald Welte | 362322e | 2009-02-15 14:36:38 +0000 | [diff] [blame] | 550 | u_int8_t buf[MACBLOCK_SIZE]; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 551 | |
| 552 | dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh)); |
| 553 | init_dchan_hdr(dh, RSL_MT_IMMEDIATE_ASSIGN_CMD); |
| 554 | dh->chan_nr = RSL_CHAN_PCH_AGCH; |
| 555 | |
Harald Welte | 362322e | 2009-02-15 14:36:38 +0000 | [diff] [blame] | 556 | switch (bts->type) { |
| 557 | case GSM_BTS_TYPE_BS11: |
| 558 | msgb_tlv_put(msg, RSL_IE_IMM_ASS_INFO, len, val); |
| 559 | break; |
| 560 | default: |
| 561 | /* If phase 2, construct a FULL_IMM_ASS_INFO */ |
| 562 | pad_macblock(buf, val, len); |
| 563 | msgb_tlv_put(msg, RSL_IE_FULL_IMM_ASS_INFO, MACBLOCK_SIZE, buf); |
| 564 | break; |
| 565 | } |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 566 | |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 567 | msg->trx = bts->c0; |
| 568 | |
| 569 | return abis_rsl_sendmsg(msg); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 570 | } |
| 571 | |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 572 | /* Send "DATA REQUEST" message with given L3 Info payload */ |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 573 | /* Chapter 8.3.1 */ |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 574 | int rsl_data_request(struct msgb *msg, u_int8_t link_id) |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 575 | { |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 576 | u_int8_t l3_len = msg->tail - (u_int8_t *)msgb_l3(msg); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 577 | struct abis_rsl_rll_hdr *rh; |
| 578 | |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 579 | if (msg->lchan == NULL) { |
| 580 | fprintf(stderr, "cannot send DATA REQUEST to unknown lchan\n"); |
| 581 | return -EINVAL; |
| 582 | } |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 583 | |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 584 | /* First push the L3 IE tag and length */ |
Harald Welte | 4b63454 | 2008-12-27 01:55:51 +0000 | [diff] [blame] | 585 | msgb_tv16_push(msg, RSL_IE_L3_INFO, l3_len); |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 586 | |
| 587 | /* Then push the RSL header */ |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 588 | rh = (struct abis_rsl_rll_hdr *) msgb_push(msg, sizeof(*rh)); |
| 589 | init_llm_hdr(rh, RSL_MT_DATA_REQ); |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 590 | rh->chan_nr = lchan2chan_nr(msg->lchan); |
| 591 | rh->link_id = link_id; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 592 | |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 593 | msg->trx = msg->lchan->ts->trx; |
| 594 | |
| 595 | return abis_rsl_sendmsg(msg); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 596 | } |
| 597 | |
Harald Welte | 702d870 | 2008-12-26 20:25:35 +0000 | [diff] [blame] | 598 | /* Chapter 8.4.2: Channel Activate Acknowledge */ |
| 599 | static int rsl_rx_chan_act_ack(struct msgb *msg) |
| 600 | { |
| 601 | struct abis_rsl_dchan_hdr *rslh = msgb_l2(msg); |
| 602 | |
| 603 | /* BTS has confirmed channel activation, we now need |
| 604 | * to assign the activated channel to the MS */ |
Harald Welte | 4b63454 | 2008-12-27 01:55:51 +0000 | [diff] [blame] | 605 | if (rslh->ie_chan != RSL_IE_CHAN_NR) |
| 606 | return -EINVAL; |
| 607 | |
| 608 | DEBUGP(DRSL, "Channel Activate ACK Channel 0x%02x\n", rslh->chan_nr); |
Harald Welte | 702d870 | 2008-12-26 20:25:35 +0000 | [diff] [blame] | 609 | |
Harald Welte | 4b63454 | 2008-12-27 01:55:51 +0000 | [diff] [blame] | 610 | return 0; |
| 611 | } |
Harald Welte | 702d870 | 2008-12-26 20:25:35 +0000 | [diff] [blame] | 612 | |
Harald Welte | 4b63454 | 2008-12-27 01:55:51 +0000 | [diff] [blame] | 613 | /* Chapter 8.4.3: Channel Activate NACK */ |
| 614 | static int rsl_rx_chan_act_nack(struct msgb *msg) |
| 615 | { |
| 616 | struct abis_rsl_dchan_hdr *rslh = msgb_l2(msg); |
| 617 | |
| 618 | /* BTS has confirmed channel activation, we now need |
| 619 | * to assign the activated channel to the MS */ |
| 620 | if (rslh->ie_chan != RSL_IE_CHAN_NR) |
| 621 | return -EINVAL; |
| 622 | |
| 623 | DEBUGP(DRSL, "Channel Activate NACK Channel 0x%02x\n", rslh->chan_nr); |
| 624 | |
| 625 | return 0; |
Harald Welte | 702d870 | 2008-12-26 20:25:35 +0000 | [diff] [blame] | 626 | } |
| 627 | |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 628 | static int abis_rsl_rx_dchan(struct msgb *msg) |
| 629 | { |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 630 | struct abis_rsl_dchan_hdr *rslh = msgb_l2(msg); |
| 631 | int rc = 0; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 632 | |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 633 | msg->lchan = lchan_lookup(msg->trx, rslh->chan_nr); |
| 634 | |
| 635 | switch (rslh->c.msg_type) { |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 636 | case RSL_MT_CHAN_ACTIV_ACK: |
Harald Welte | 4b63454 | 2008-12-27 01:55:51 +0000 | [diff] [blame] | 637 | rc = rsl_rx_chan_act_ack(msg); |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 638 | break; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 639 | case RSL_MT_CHAN_ACTIV_NACK: |
Harald Welte | 4b63454 | 2008-12-27 01:55:51 +0000 | [diff] [blame] | 640 | rc = rsl_rx_chan_act_nack(msg); |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 641 | break; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 642 | case RSL_MT_CONN_FAIL: |
Harald Welte | 2d5b638 | 2008-12-27 19:46:06 +0000 | [diff] [blame] | 643 | DEBUGP(DRSL, "Connection Fail, release channel\n"); |
Harald Welte | 14537e5 | 2008-12-27 10:29:08 +0000 | [diff] [blame] | 644 | rc = rsl_chan_release(msg->lchan); |
Harald Welte | 2d5b638 | 2008-12-27 19:46:06 +0000 | [diff] [blame] | 645 | /* only free it after channel release ACK */ |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 646 | break; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 647 | case RSL_MT_MEAS_RES: |
Harald Welte | 2d5b638 | 2008-12-27 19:46:06 +0000 | [diff] [blame] | 648 | DEBUGP(DRSL, "Measurement Result\n"); |
| 649 | break; |
| 650 | case RSL_MT_RF_CHAN_REL_ACK: |
Harald Welte | 8f5e239 | 2009-02-03 12:57:37 +0000 | [diff] [blame] | 651 | DEBUGP(DRSL, "RF CHANNEL RELEASE ACK chan_nr=0x%02x\n", |
| 652 | rslh->chan_nr); |
Harald Welte | 2d5b638 | 2008-12-27 19:46:06 +0000 | [diff] [blame] | 653 | lchan_free(msg->lchan); |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 654 | break; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 655 | case RSL_MT_MODE_MODIFY_ACK: |
Harald Welte | da78376 | 2009-02-18 03:29:53 +0000 | [diff] [blame] | 656 | DEBUGP(DRSL, "RSL CHANNEL MODE MODIFY ACK chan_nr=0x%02x\n", |
| 657 | rslh->chan_nr); |
| 658 | break; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 659 | case RSL_MT_MODE_MODIFY_NACK: |
Harald Welte | da78376 | 2009-02-18 03:29:53 +0000 | [diff] [blame] | 660 | DEBUGP(DRSL, "RSL CHANNEL MODE MODIFY NACK chan_nr=0x%02x\n", |
| 661 | rslh->chan_nr); |
| 662 | break; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 663 | case RSL_MT_PHY_CONTEXT_CONF: |
| 664 | case RSL_MT_PREPROC_MEAS_RES: |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 665 | case RSL_MT_TALKER_DET: |
| 666 | case RSL_MT_LISTENER_DET: |
| 667 | case RSL_MT_REMOTE_CODEC_CONF_REP: |
| 668 | case RSL_MT_MR_CODEC_MOD_ACK: |
| 669 | case RSL_MT_MR_CODEC_MOD_NACK: |
| 670 | case RSL_MT_MR_CODEC_MOD_PER: |
| 671 | fprintf(stderr, "Unimplemented Abis RSL DChan msg 0x%02x\n", |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 672 | rslh->c.msg_type); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 673 | break; |
| 674 | default: |
| 675 | fprintf(stderr, "unknown Abis RSL DChan msg 0x%02x\n", |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 676 | rslh->c.msg_type); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 677 | return -EINVAL; |
| 678 | } |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 679 | return rc; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 680 | } |
| 681 | |
Harald Welte | 702d870 | 2008-12-26 20:25:35 +0000 | [diff] [blame] | 682 | static int rsl_rx_error_rep(struct msgb *msg) |
| 683 | { |
| 684 | struct abis_rsl_common_hdr *rslh = msgb_l2(msg); |
| 685 | u_int8_t cause_len; |
| 686 | |
| 687 | if (rslh->data[0] != RSL_IE_CAUSE) |
| 688 | return -EINVAL; |
| 689 | |
| 690 | cause_len = rslh->data[1]; |
Harald Welte | 4b63454 | 2008-12-27 01:55:51 +0000 | [diff] [blame] | 691 | fprintf(stdout, "RSL ERROR REPORT, Cause "); |
Harald Welte | 702d870 | 2008-12-26 20:25:35 +0000 | [diff] [blame] | 692 | hexdump(&rslh->data[2], cause_len); |
| 693 | |
| 694 | return 0; |
| 695 | } |
| 696 | |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 697 | static int abis_rsl_rx_trx(struct msgb *msg) |
| 698 | { |
Harald Welte | 702d870 | 2008-12-26 20:25:35 +0000 | [diff] [blame] | 699 | struct abis_rsl_common_hdr *rslh = msgb_l2(msg); |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 700 | int rc = 0; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 701 | |
| 702 | switch (rslh->msg_type) { |
Harald Welte | 702d870 | 2008-12-26 20:25:35 +0000 | [diff] [blame] | 703 | case RSL_MT_ERROR_REPORT: |
| 704 | rc = rsl_rx_error_rep(msg); |
| 705 | break; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 706 | case RSL_MT_RF_RES_IND: |
| 707 | /* interference on idle channels of TRX */ |
Harald Welte | 8f5e239 | 2009-02-03 12:57:37 +0000 | [diff] [blame] | 708 | fprintf(stderr, "RSL TRX: RF Interference Indication\n"); |
| 709 | break; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 710 | case RSL_MT_OVERLOAD: |
| 711 | /* indicate CCCH / ACCH / processor overload */ |
Harald Welte | 8f5e239 | 2009-02-03 12:57:37 +0000 | [diff] [blame] | 712 | fprintf(stderr, "RSL TRX: CCCH/ACCH/CPU Overload\n"); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 713 | break; |
| 714 | default: |
| 715 | fprintf(stderr, "Unknown Abis RSL TRX message type 0x%02x\n", |
| 716 | rslh->msg_type); |
| 717 | return -EINVAL; |
| 718 | } |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 719 | return rc; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 720 | } |
| 721 | |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 722 | /* MS has requested a channel on the RACH */ |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 723 | static int rsl_rx_chan_rqd(struct msgb *msg) |
| 724 | { |
Harald Welte | 702d870 | 2008-12-26 20:25:35 +0000 | [diff] [blame] | 725 | struct gsm_bts *bts = msg->trx->bts; |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 726 | struct abis_rsl_dchan_hdr *rqd_hdr = msgb_l2(msg); |
| 727 | struct gsm48_req_ref *rqd_ref; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 728 | struct gsm48_imm_ass ia; |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 729 | enum gsm_chan_t lctype; |
Harald Welte | 2cbe092 | 2008-12-29 04:09:31 +0000 | [diff] [blame] | 730 | enum gsm_chreq_reason_t chreq_reason; |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 731 | struct gsm_lchan *lchan; |
| 732 | u_int8_t rqd_ta; |
Holger Freyther | 3186bf2 | 2008-12-29 06:23:49 +0000 | [diff] [blame] | 733 | int ret; |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 734 | |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 735 | u_int16_t arfcn; |
| 736 | u_int8_t ts_number, subch; |
| 737 | |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 738 | /* parse request reference to be used in immediate assign */ |
| 739 | if (rqd_hdr->data[0] != RSL_IE_REQ_REFERENCE) |
| 740 | return -EINVAL; |
| 741 | |
| 742 | rqd_ref = (struct gsm48_req_ref *) &rqd_hdr->data[1]; |
| 743 | |
| 744 | /* parse access delay and use as TA */ |
| 745 | if (rqd_hdr->data[sizeof(struct gsm48_req_ref)+1] != RSL_IE_ACCESS_DELAY) |
| 746 | return -EINVAL; |
| 747 | rqd_ta = rqd_hdr->data[sizeof(struct gsm48_req_ref)+2]; |
| 748 | |
| 749 | /* determine channel type (SDCCH/TCH_F/TCH_H) based on |
| 750 | * request reference RA */ |
| 751 | lctype = get_ctype_by_chreq(bts, rqd_ref->ra); |
Harald Welte | 2cbe092 | 2008-12-29 04:09:31 +0000 | [diff] [blame] | 752 | chreq_reason = get_reason_by_chreq(bts, rqd_ref->ra); |
| 753 | |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 754 | /* check availability / allocate channel */ |
| 755 | lchan = lchan_alloc(bts, lctype); |
| 756 | if (!lchan) { |
| 757 | fprintf(stderr, "CHAN RQD: no resources\n"); |
| 758 | /* FIXME: send some kind of reject ?!? */ |
| 759 | return -ENOMEM; |
| 760 | } |
| 761 | |
| 762 | ts_number = lchan->ts->nr; |
| 763 | arfcn = lchan->ts->trx->arfcn; |
| 764 | subch = lchan->nr; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 765 | |
Harald Welte | d4c9bf3 | 2009-02-15 16:56:18 +0000 | [diff] [blame] | 766 | lchan->ms_power = lchan->bs_power = 0x0f; /* 30dB reduction */ |
Harald Welte | 4b63454 | 2008-12-27 01:55:51 +0000 | [diff] [blame] | 767 | rsl_chan_activate_lchan(lchan, 0x00, rqd_ta); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 768 | |
| 769 | /* create IMMEDIATE ASSIGN 04.08 messge */ |
| 770 | memset(&ia, 0, sizeof(ia)); |
| 771 | ia.l2_plen = 0x2d; |
| 772 | ia.proto_discr = GSM48_PDISC_RR; |
| 773 | ia.msg_type = GSM48_MT_RR_IMM_ASS; |
Harald Welte | 2d5b638 | 2008-12-27 19:46:06 +0000 | [diff] [blame] | 774 | ia.page_mode = GSM48_PM_SAME; |
Harald Welte | 4b63454 | 2008-12-27 01:55:51 +0000 | [diff] [blame] | 775 | ia.chan_desc.chan_nr = lchan2chan_nr(lchan); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 776 | ia.chan_desc.h0.h = 0; |
| 777 | ia.chan_desc.h0.arfcn_high = arfcn >> 8; |
| 778 | ia.chan_desc.h0.arfcn_low = arfcn & 0xff; |
| 779 | ia.chan_desc.h0.tsc = 7; |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 780 | /* use request reference extracted from CHAN_RQD */ |
| 781 | memcpy(&ia.req_ref, rqd_ref, sizeof(ia.req_ref)); |
| 782 | ia.timing_advance = rqd_ta; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 783 | ia.mob_alloc_len = 0; |
| 784 | |
Harald Welte | 8f5e239 | 2009-02-03 12:57:37 +0000 | [diff] [blame] | 785 | DEBUGP(DRSL, "Activating ARFCN(%u) TS(%u) SS(%u) lctype %s " |
| 786 | "chan_nr=0x%02x r=%s\n", |
Harald Welte | ca64da9 | 2009-01-04 16:54:12 +0000 | [diff] [blame] | 787 | arfcn, ts_number, subch, gsm_lchan_name(lchan->type), |
| 788 | ia.chan_desc.chan_nr, gsm_chreq_name(chreq_reason)); |
Harald Welte | 75a983f | 2008-12-27 21:34:06 +0000 | [diff] [blame] | 789 | |
Harald Welte | 09e38af | 2009-02-16 22:52:23 +0000 | [diff] [blame] | 790 | /* FIXME: Start timer T3101 to wait for GSM48_MT_RR_PAG_RESP */ |
Holger Freyther | 3186bf2 | 2008-12-29 06:23:49 +0000 | [diff] [blame] | 791 | |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 792 | /* send IMMEDIATE ASSIGN CMD on RSL to BTS (to send on CCCH to MS) */ |
Holger Freyther | 3186bf2 | 2008-12-29 06:23:49 +0000 | [diff] [blame] | 793 | ret = rsl_imm_assign_cmd(bts, sizeof(ia), (u_int8_t *) &ia); |
| 794 | |
Harald Welte | 817f3c8 | 2008-12-30 14:57:59 +0000 | [diff] [blame] | 795 | return ret; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 796 | } |
| 797 | |
Harald Welte | ea28044 | 2009-02-02 22:29:56 +0000 | [diff] [blame] | 798 | /* MS has requested a channel on the RACH */ |
| 799 | static int rsl_rx_ccch_load(struct msgb *msg) |
| 800 | { |
| 801 | struct abis_rsl_dchan_hdr *rslh = msgb_l2(msg); |
| 802 | u_int16_t pg_buf_space; |
Holger Freyther | 8c563cf | 2009-02-03 20:08:51 +0000 | [diff] [blame] | 803 | u_int16_t rach_slot_count = -1; |
| 804 | u_int16_t rach_busy_count = -1; |
| 805 | u_int16_t rach_access_count = -1; |
Harald Welte | ea28044 | 2009-02-02 22:29:56 +0000 | [diff] [blame] | 806 | |
| 807 | switch (rslh->data[0]) { |
| 808 | case RSL_IE_PAGING_LOAD: |
| 809 | pg_buf_space = rslh->data[1] << 8 | rslh->data[2]; |
Holger Freyther | 392209c | 2009-02-10 00:06:19 +0000 | [diff] [blame] | 810 | paging_update_buffer_space(msg->trx->bts, pg_buf_space); |
Harald Welte | ea28044 | 2009-02-02 22:29:56 +0000 | [diff] [blame] | 811 | break; |
| 812 | case RSL_IE_RACH_LOAD: |
Holger Freyther | 8c563cf | 2009-02-03 20:08:51 +0000 | [diff] [blame] | 813 | if (msg->data_len >= 7) { |
| 814 | rach_slot_count = rslh->data[2] << 8 | rslh->data[3]; |
| 815 | rach_busy_count = rslh->data[4] << 8 | rslh->data[5]; |
| 816 | rach_access_count = rslh->data[6] << 8 | rslh->data[7]; |
| 817 | } |
Harald Welte | ea28044 | 2009-02-02 22:29:56 +0000 | [diff] [blame] | 818 | break; |
| 819 | default: |
| 820 | break; |
| 821 | } |
| 822 | |
| 823 | return 0; |
| 824 | } |
| 825 | |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 826 | static int abis_rsl_rx_cchan(struct msgb *msg) |
| 827 | { |
Harald Welte | ea28044 | 2009-02-02 22:29:56 +0000 | [diff] [blame] | 828 | struct abis_rsl_dchan_hdr *rslh = msgb_l2(msg); |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 829 | int rc = 0; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 830 | |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 831 | msg->lchan = lchan_lookup(msg->trx, rslh->chan_nr); |
| 832 | |
| 833 | switch (rslh->c.msg_type) { |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 834 | case RSL_MT_CHAN_RQD: |
| 835 | /* MS has requested a channel on the RACH */ |
| 836 | rc = rsl_rx_chan_rqd(msg); |
| 837 | break; |
Harald Welte | ea28044 | 2009-02-02 22:29:56 +0000 | [diff] [blame] | 838 | case RSL_MT_CCCH_LOAD_IND: |
| 839 | /* current load on the CCCH */ |
| 840 | rc = rsl_rx_ccch_load(msg); |
| 841 | break; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 842 | case RSL_MT_DELETE_IND: |
| 843 | /* CCCH overloaded, IMM_ASSIGN was dropped */ |
| 844 | case RSL_MT_CBCH_LOAD_IND: |
| 845 | /* current load on the CBCH */ |
Harald Welte | 8f5e239 | 2009-02-03 12:57:37 +0000 | [diff] [blame] | 846 | fprintf(stderr, "Unimplemented Abis RSL TRX message type " |
| 847 | "0x%02x\n", rslh->c.msg_type); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 848 | break; |
| 849 | default: |
| 850 | fprintf(stderr, "Unknown Abis RSL TRX message type 0x%02x\n", |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 851 | rslh->c.msg_type); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 852 | return -EINVAL; |
| 853 | } |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 854 | |
| 855 | return rc; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 856 | } |
| 857 | |
Harald Welte | 4b63454 | 2008-12-27 01:55:51 +0000 | [diff] [blame] | 858 | static int rsl_rx_rll_err_ind(struct msgb *msg) |
| 859 | { |
| 860 | struct abis_rsl_rll_hdr *rllh = msgb_l2(msg); |
| 861 | u_int8_t *rlm_cause = rllh->data; |
| 862 | |
| 863 | DEBUGP(DRLL, "RLL ERROR INDICATION: chan_nr=0x%02x cause=0x%02x\n", |
| 864 | rllh->chan_nr, rlm_cause[1]); |
| 865 | |
| 866 | return 0; |
| 867 | } |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 868 | /* ESTABLISH INDICATION, LOCATION AREA UPDATE REQUEST |
| 869 | 0x02, 0x06, |
| 870 | 0x01, 0x20, |
| 871 | 0x02, 0x00, |
| 872 | 0x0b, 0x00, 0x0f, 0x05, 0x08, ... */ |
| 873 | |
| 874 | static int abis_rsl_rx_rll(struct msgb *msg) |
| 875 | { |
| 876 | struct abis_rsl_rll_hdr *rllh = msgb_l2(msg); |
| 877 | int rc; |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 878 | |
| 879 | msg->lchan = lchan_lookup(msg->trx, rllh->chan_nr); |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 880 | |
| 881 | switch (rllh->c.msg_type) { |
| 882 | case RSL_MT_DATA_IND: |
Harald Welte | 4b63454 | 2008-12-27 01:55:51 +0000 | [diff] [blame] | 883 | DEBUGP(DRLL, "DATA INDICATION chan_nr=0x%02x\n", rllh->chan_nr); |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 884 | /* FIXME: Verify L3 info element */ |
Harald Welte | 702d870 | 2008-12-26 20:25:35 +0000 | [diff] [blame] | 885 | msg->l3h = &rllh->data[3]; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 886 | rc = gsm0408_rcvmsg(msg); |
| 887 | break; |
| 888 | case RSL_MT_EST_IND: |
Harald Welte | 8f5e239 | 2009-02-03 12:57:37 +0000 | [diff] [blame] | 889 | DEBUGP(DRLL, "ESTABLISH INDICATION chan_nr=0x%02x\n", |
| 890 | rllh->chan_nr); |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 891 | /* FIXME: Verify L3 info element */ |
Harald Welte | 702d870 | 2008-12-26 20:25:35 +0000 | [diff] [blame] | 892 | msg->l3h = &rllh->data[3]; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 893 | rc = gsm0408_rcvmsg(msg); |
| 894 | break; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 895 | case RSL_MT_REL_IND: |
Harald Welte | 8f5e239 | 2009-02-03 12:57:37 +0000 | [diff] [blame] | 896 | DEBUGP(DRLL, "RELEASE INDICATION chan_nr=0x%02x\n", |
| 897 | rllh->chan_nr); |
Harald Welte | 2d5b638 | 2008-12-27 19:46:06 +0000 | [diff] [blame] | 898 | break; |
| 899 | case RSL_MT_REL_CONF: |
Harald Welte | 8f5e239 | 2009-02-03 12:57:37 +0000 | [diff] [blame] | 900 | DEBUGP(DRLL, "RELEASE CONFIRMATION chan_nr=0x%02x\n", |
| 901 | rllh->chan_nr); |
Harald Welte | 4b63454 | 2008-12-27 01:55:51 +0000 | [diff] [blame] | 902 | break; |
| 903 | case RSL_MT_ERROR_IND: |
| 904 | rc = rsl_rx_rll_err_ind(msg); |
| 905 | break; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 906 | case RSL_MT_UNIT_DATA_IND: |
| 907 | fprintf(stderr, "unimplemented Abis RLL message type 0x%02x\n", |
| 908 | rllh->c.msg_type); |
| 909 | break; |
| 910 | default: |
| 911 | fprintf(stderr, "unknown Abis RLL message type 0x%02x\n", |
| 912 | rllh->c.msg_type); |
| 913 | } |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 914 | return rc; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 915 | } |
| 916 | |
Harald Welte | 7509926 | 2009-02-16 21:12:08 +0000 | [diff] [blame] | 917 | /* ip.access specific RSL extensions */ |
| 918 | int rsl_ipacc_bind(struct gsm_lchan *lchan) |
| 919 | { |
| 920 | struct msgb *msg = rsl_msgb_alloc(); |
| 921 | struct abis_rsl_dchan_hdr *dh; |
| 922 | |
| 923 | dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh)); |
| 924 | init_dchan_hdr(dh, RSL_MT_IPAC_BIND); |
| 925 | dh->c.msg_discr = ABIS_RSL_MDISC_IPACCESS; |
| 926 | dh->chan_nr = lchan2chan_nr(lchan); |
| 927 | |
| 928 | msg->trx = lchan->ts->trx; |
| 929 | |
| 930 | return abis_rsl_sendmsg(msg); |
| 931 | } |
| 932 | |
| 933 | int rsl_ipacc_connect(struct gsm_lchan *lchan, u_int32_t ip, u_int16_t port, u_int16_t f8, u_int8_t fc) |
| 934 | { |
| 935 | struct msgb *msg = rsl_msgb_alloc(); |
| 936 | struct abis_rsl_dchan_hdr *dh; |
| 937 | u_int8_t *att_f8, *att_ip, *att_port; |
| 938 | |
| 939 | dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh)); |
| 940 | init_dchan_hdr(dh, RSL_MT_IPAC_CONNECT); |
| 941 | dh->c.msg_discr = ABIS_RSL_MDISC_IPACCESS; |
| 942 | dh->chan_nr = lchan2chan_nr(lchan); |
| 943 | |
| 944 | att_f8 = msgb_put(msg, sizeof(f8)+1); |
| 945 | att_f8[0] = 0xf8; |
| 946 | att_f8[1] = f8 >> 8; |
| 947 | att_f8[2] = f8 & 0xff; |
| 948 | |
| 949 | att_ip = msgb_put(msg, sizeof(ip)+1); |
| 950 | att_ip[0] = RSL_IE_IPAC_REMOTE_IP; |
| 951 | att_ip[1] = ip >> 24; |
| 952 | att_ip[2] = ip >> 16; |
| 953 | att_ip[3] = ip >> 8; |
| 954 | att_ip[4] = ip & 0xff; |
Harald Welte | da78376 | 2009-02-18 03:29:53 +0000 | [diff] [blame] | 955 | //att_ip[4] = 11; |
Harald Welte | 7509926 | 2009-02-16 21:12:08 +0000 | [diff] [blame] | 956 | |
| 957 | att_port = msgb_put(msg, sizeof(port)+1); |
| 958 | att_port[0] = RSL_IE_IPAC_REMOTE_PORT; |
| 959 | att_port[1] = port >> 8; |
| 960 | att_port[2] = port & 0xff; |
| 961 | |
| 962 | msgb_tv_put(msg, 0xf4, 1); /* F4 01 */ |
| 963 | msgb_tv_put(msg, 0xfc, fc); /* FC 7F */ |
| 964 | msg->trx = lchan->ts->trx; |
| 965 | |
| 966 | return abis_rsl_sendmsg(msg); |
| 967 | } |
| 968 | |
| 969 | static int abis_rsl_rx_ipacc_bindack(struct msgb *msg) |
| 970 | { |
| 971 | struct abis_rsl_dchan_hdr *dh = msgb_l2(msg); |
| 972 | struct tlv_parsed tv; |
| 973 | struct gsm_bts_trx_ts *ts = msg->lchan->ts; |
Harald Welte | 167df88 | 2009-02-17 14:35:45 +0000 | [diff] [blame] | 974 | struct in_addr ip; |
Harald Welte | 7509926 | 2009-02-16 21:12:08 +0000 | [diff] [blame] | 975 | u_int16_t port, attr_f8; |
| 976 | |
| 977 | /* the BTS has acknowledged a local bind, it now tells us the IP |
| 978 | * address and port number to which it has bound the given logical |
| 979 | * channel */ |
| 980 | |
| 981 | rsl_tlv_parse(&tv, dh->data, msgb_l2len(msg)-sizeof(*dh)); |
| 982 | if (!TLVP_PRESENT(&tv, RSL_IE_IPAC_LOCAL_PORT) || |
| 983 | !TLVP_PRESENT(&tv, RSL_IE_IPAC_LOCAL_IP) || |
| 984 | !TLVP_PRESENT(&tv, 0xfc) || |
| 985 | !TLVP_PRESENT(&tv, 0xf8)) { |
| 986 | DEBUGP(DRSL, "mandatory IE missing\n"); |
| 987 | return -EINVAL; |
| 988 | } |
Harald Welte | 167df88 | 2009-02-17 14:35:45 +0000 | [diff] [blame] | 989 | ip.s_addr = *((u_int32_t *) TLVP_VAL(&tv, RSL_IE_IPAC_LOCAL_IP)); |
Harald Welte | 7509926 | 2009-02-16 21:12:08 +0000 | [diff] [blame] | 990 | port = *((u_int16_t *) TLVP_VAL(&tv, RSL_IE_IPAC_LOCAL_PORT)); |
| 991 | attr_f8 = *((u_int16_t *) TLVP_VAL(&tv, 0xf8)); |
| 992 | |
Harald Welte | 167df88 | 2009-02-17 14:35:45 +0000 | [diff] [blame] | 993 | DEBUGP(DRSL, "IPAC_BIND_ACK chan_nr=0x%02x IP=%s PORT=%d FC=%d F8=%d\n", |
| 994 | dh->chan_nr, inet_ntoa(ip), ntohs(port), *TLVP_VAL(&tv, 0xfc), |
| 995 | ntohs(attr_f8)); |
| 996 | |
Harald Welte | 7509926 | 2009-02-16 21:12:08 +0000 | [diff] [blame] | 997 | /* update our local information about this TS */ |
Harald Welte | 167df88 | 2009-02-17 14:35:45 +0000 | [diff] [blame] | 998 | ts->abis_ip.bound_ip = ntohl(ip.s_addr); |
| 999 | ts->abis_ip.bound_port = ntohs(port); |
Harald Welte | 7509926 | 2009-02-16 21:12:08 +0000 | [diff] [blame] | 1000 | ts->abis_ip.attr_f8 = ntohs(attr_f8); |
| 1001 | ts->abis_ip.attr_fc = *TLVP_VAL(&tv, 0xfc); |
| 1002 | |
Harald Welte | 167df88 | 2009-02-17 14:35:45 +0000 | [diff] [blame] | 1003 | dispatch_signal(SS_ABISIP, S_ABISIP_BIND_ACK, msg->lchan); |
| 1004 | |
Harald Welte | 7509926 | 2009-02-16 21:12:08 +0000 | [diff] [blame] | 1005 | return 0; |
| 1006 | } |
| 1007 | |
| 1008 | static int abis_rsl_rx_ipacc_disc_ind(struct msgb *msg) |
| 1009 | { |
| 1010 | struct abis_rsl_dchan_hdr *dh = msgb_l2(msg); |
| 1011 | struct tlv_parsed tv; |
| 1012 | |
| 1013 | rsl_tlv_parse(&tv, dh->data, msgb_l2len(msg)-sizeof(*dh)); |
| 1014 | if (!TLVP_PRESENT(&tv, RSL_IE_CAUSE)) { |
| 1015 | DEBUGP(DRSL, "mandatory IE missing\n"); |
| 1016 | return -EINVAL; |
| 1017 | } |
| 1018 | |
| 1019 | DEBUGP(DNM, "cause=0x%02x\n", *TLVP_VAL(&tv, RSL_IE_CAUSE)); |
| 1020 | |
| 1021 | return 0; |
| 1022 | } |
| 1023 | |
| 1024 | static int abis_rsl_rx_ipacc(struct msgb *msg) |
| 1025 | { |
| 1026 | struct abis_rsl_rll_hdr *rllh = msgb_l2(msg); |
| 1027 | int rc = 0; |
| 1028 | |
| 1029 | msg->lchan = lchan_lookup(msg->trx, rllh->chan_nr); |
| 1030 | |
| 1031 | switch (rllh->c.msg_type) { |
| 1032 | case RSL_MT_IPAC_BIND_ACK: |
Harald Welte | 7509926 | 2009-02-16 21:12:08 +0000 | [diff] [blame] | 1033 | rc = abis_rsl_rx_ipacc_bindack(msg); |
| 1034 | break; |
| 1035 | case RSL_MT_IPAC_BIND_NACK: |
| 1036 | /* somehow the BTS was unable to bind the lchan to its local |
| 1037 | * port?!? */ |
| 1038 | DEBUGP(DRSL, "IPAC_BIND_NACK\n"); |
| 1039 | break; |
| 1040 | case RSL_MT_IPAC_CONNECT_ACK: |
| 1041 | /* the BTS tells us that a connect operation was successful */ |
| 1042 | DEBUGP(DRSL, "IPAC_CONNECT_ACK\n"); |
| 1043 | break; |
| 1044 | case RSL_MT_IPAC_CONNECT_NACK: |
| 1045 | /* somehow the BTS was unable to connect the lchan to a remote |
| 1046 | * port */ |
Harald Welte | 49dfa35 | 2009-02-17 15:29:58 +0000 | [diff] [blame] | 1047 | DEBUGP(DRSL, "IPAC_CONNECT_NACK\n"); |
Harald Welte | 7509926 | 2009-02-16 21:12:08 +0000 | [diff] [blame] | 1048 | break; |
| 1049 | case RSL_MT_IPAC_DISCONNECT_IND: |
| 1050 | DEBUGP(DRSL, "IPAC_DISCONNECT_IND\n"); |
| 1051 | rc = abis_rsl_rx_ipacc_disc_ind(msg); |
| 1052 | break; |
| 1053 | default: |
| 1054 | DEBUGP(DRSL, "Unknown ip.access msg_type 0x%02x\n", rllh->c.msg_type); |
| 1055 | break; |
| 1056 | } |
| 1057 | |
| 1058 | return rc; |
| 1059 | } |
| 1060 | |
| 1061 | |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1062 | /* Entry-point where L2 RSL from BTS enters */ |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 1063 | int abis_rsl_rcvmsg(struct msgb *msg) |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1064 | { |
| 1065 | struct abis_rsl_common_hdr *rslh = msgb_l2(msg) ; |
Harald Welte | 8f5e239 | 2009-02-03 12:57:37 +0000 | [diff] [blame] | 1066 | int rc = 0; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1067 | |
| 1068 | switch (rslh->msg_discr & 0xfe) { |
| 1069 | case ABIS_RSL_MDISC_RLL: |
| 1070 | rc = abis_rsl_rx_rll(msg); |
| 1071 | break; |
| 1072 | case ABIS_RSL_MDISC_DED_CHAN: |
| 1073 | rc = abis_rsl_rx_dchan(msg); |
| 1074 | break; |
| 1075 | case ABIS_RSL_MDISC_COM_CHAN: |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1076 | rc = abis_rsl_rx_cchan(msg); |
| 1077 | break; |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 1078 | case ABIS_RSL_MDISC_TRX: |
| 1079 | rc = abis_rsl_rx_trx(msg); |
| 1080 | break; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1081 | case ABIS_RSL_MDISC_LOC: |
Harald Welte | 8f5e239 | 2009-02-03 12:57:37 +0000 | [diff] [blame] | 1082 | fprintf(stderr, "unimplemented RSL msg disc 0x%02x\n", |
| 1083 | rslh->msg_discr); |
| 1084 | break; |
Harald Welte | 7509926 | 2009-02-16 21:12:08 +0000 | [diff] [blame] | 1085 | case ABIS_RSL_MDISC_IPACCESS: |
| 1086 | rc = abis_rsl_rx_ipacc(msg); |
| 1087 | break; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1088 | default: |
| 1089 | fprintf(stderr, "unknown RSL message discriminator 0x%02x\n", |
| 1090 | rslh->msg_discr); |
| 1091 | return -EINVAL; |
| 1092 | } |
Harald Welte | 4f4a390 | 2008-12-26 00:04:49 +0000 | [diff] [blame] | 1093 | msgb_free(msg); |
Harald Welte | 8470bf2 | 2008-12-25 23:28:35 +0000 | [diff] [blame] | 1094 | return rc; |
Harald Welte | 52b1f98 | 2008-12-23 20:25:15 +0000 | [diff] [blame] | 1095 | } |
Holger Freyther | 3b72a89 | 2009-02-04 00:31:39 +0000 | [diff] [blame] | 1096 | |
| 1097 | |
| 1098 | /* Section 3.3.2.3 . I think this looks like a table */ |
| 1099 | int rsl_ccch_conf_to_bs_cc_chans(int ccch_conf) |
| 1100 | { |
| 1101 | switch (ccch_conf) { |
| 1102 | case RSL_BCCH_CCCH_CONF_1_NC: |
| 1103 | return 1; |
| 1104 | case RSL_BCCH_CCCH_CONF_1_C: |
| 1105 | return 1; |
| 1106 | case RSL_BCCH_CCCH_CONF_2_NC: |
| 1107 | return 2; |
| 1108 | case RSL_BCCH_CCCH_CONF_3_NC: |
| 1109 | return 3; |
| 1110 | case RSL_BCCH_CCCH_CONF_4_NC: |
| 1111 | return 4; |
| 1112 | default: |
| 1113 | return -1; |
| 1114 | } |
| 1115 | } |
| 1116 | |
| 1117 | int rsl_ccch_conf_to_bs_ccch_sdcch_comb(int ccch_conf) |
| 1118 | { |
| 1119 | switch (ccch_conf) { |
| 1120 | case RSL_BCCH_CCCH_CONF_1_NC: |
| 1121 | return 0; |
| 1122 | case RSL_BCCH_CCCH_CONF_1_C: |
| 1123 | return 1; |
| 1124 | case RSL_BCCH_CCCH_CONF_2_NC: |
| 1125 | return 0; |
| 1126 | case RSL_BCCH_CCCH_CONF_3_NC: |
| 1127 | return 0; |
| 1128 | case RSL_BCCH_CCCH_CONF_4_NC: |
| 1129 | return 0; |
| 1130 | default: |
| 1131 | return -1; |
| 1132 | } |
| 1133 | } |
| 1134 | |
| 1135 | /* From Table 10.5.33 of GSM 04.08 */ |
| 1136 | int rsl_number_of_paging_subchannels(struct gsm_bts *bts) |
| 1137 | { |
| 1138 | if (bts->chan_desc.ccch_conf == RSL_BCCH_CCCH_CONF_1_C) { |
| 1139 | return MAX(1, (3 - bts->chan_desc.bs_ag_blks_res)) |
Holger Freyther | 3aa8d6c | 2009-02-04 02:14:45 +0000 | [diff] [blame] | 1140 | * (bts->chan_desc.bs_pa_mfrms + 2); |
Holger Freyther | 3b72a89 | 2009-02-04 00:31:39 +0000 | [diff] [blame] | 1141 | } else { |
| 1142 | return (9 - bts->chan_desc.bs_ag_blks_res) |
Holger Freyther | 3aa8d6c | 2009-02-04 02:14:45 +0000 | [diff] [blame] | 1143 | * (bts->chan_desc.bs_pa_mfrms + 2); |
Holger Freyther | 3b72a89 | 2009-02-04 00:31:39 +0000 | [diff] [blame] | 1144 | } |
| 1145 | } |