Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [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 | |
| 4 | /* (C) 2008-2009 by Harald Welte <laforge@gnumonks.org> |
| 5 | * |
| 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> |
| 25 | #include <stdlib.h> |
| 26 | #include <errno.h> |
| 27 | #include <sys/types.h> |
| 28 | #include <netinet/in.h> |
| 29 | #include <arpa/inet.h> |
| 30 | |
| 31 | #include <openbsc/gsm_data.h> |
| 32 | #include <openbsc/gsm_04_08.h> |
Harald Welte | c4dcda0 | 2009-08-09 14:45:18 +0200 | [diff] [blame] | 33 | #include <openbsc/gsm_utils.h> |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 34 | #include <openbsc/abis_rsl.h> |
| 35 | #include <openbsc/chan_alloc.h> |
Harald Welte | ed9a5ab | 2009-08-09 13:47:35 +0200 | [diff] [blame] | 36 | #include <openbsc/bsc_rll.h> |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 37 | #include <openbsc/debug.h> |
| 38 | #include <openbsc/tlv.h> |
| 39 | #include <openbsc/paging.h> |
| 40 | #include <openbsc/signal.h> |
| 41 | |
| 42 | #define RSL_ALLOC_SIZE 1024 |
| 43 | #define RSL_ALLOC_HEADROOM 128 |
| 44 | |
| 45 | #define MAX(a, b) (a) >= (b) ? (a) : (b) |
| 46 | |
| 47 | static const struct tlv_definition rsl_att_tlvdef = { |
| 48 | .def = { |
| 49 | [RSL_IE_CHAN_NR] = { TLV_TYPE_TV }, |
| 50 | [RSL_IE_LINK_IDENT] = { TLV_TYPE_TV }, |
| 51 | [RSL_IE_ACT_TYPE] = { TLV_TYPE_TV }, |
| 52 | [RSL_IE_BS_POWER] = { TLV_TYPE_TV }, |
| 53 | [RSL_IE_CHAN_IDENT] = { TLV_TYPE_TLV }, |
| 54 | [RSL_IE_CHAN_MODE] = { TLV_TYPE_TLV }, |
| 55 | [RSL_IE_ENCR_INFO] = { TLV_TYPE_TLV }, |
| 56 | [RSL_IE_FRAME_NUMBER] = { TLV_TYPE_FIXED, 2 }, |
| 57 | [RSL_IE_HANDO_REF] = { TLV_TYPE_TV }, |
| 58 | [RSL_IE_L1_INFO] = { TLV_TYPE_FIXED, 2 }, |
| 59 | [RSL_IE_L3_INFO] = { TLV_TYPE_TL16V }, |
| 60 | [RSL_IE_MS_IDENTITY] = { TLV_TYPE_TLV }, |
| 61 | [RSL_IE_MS_POWER] = { TLV_TYPE_TV }, |
| 62 | [RSL_IE_PAGING_GROUP] = { TLV_TYPE_TV }, |
| 63 | [RSL_IE_PAGING_LOAD] = { TLV_TYPE_FIXED, 2 }, |
| 64 | [RSL_IE_PYHS_CONTEXT] = { TLV_TYPE_TLV }, |
| 65 | [RSL_IE_ACCESS_DELAY] = { TLV_TYPE_TV }, |
| 66 | [RSL_IE_RACH_LOAD] = { TLV_TYPE_TLV }, |
| 67 | [RSL_IE_REQ_REFERENCE] = { TLV_TYPE_FIXED, 3 }, |
| 68 | [RSL_IE_RELEASE_MODE] = { TLV_TYPE_TV }, |
| 69 | [RSL_IE_RESOURCE_INFO] = { TLV_TYPE_TLV }, |
| 70 | [RSL_IE_RLM_CAUSE] = { TLV_TYPE_TLV }, |
| 71 | [RSL_IE_STARTNG_TIME] = { TLV_TYPE_FIXED, 2 }, |
| 72 | [RSL_IE_TIMING_ADVANCE] = { TLV_TYPE_TV }, |
| 73 | [RSL_IE_UPLINK_MEAS] = { TLV_TYPE_TLV }, |
| 74 | [RSL_IE_CAUSE] = { TLV_TYPE_TLV }, |
| 75 | [RSL_IE_MEAS_RES_NR] = { TLV_TYPE_TV }, |
| 76 | [RSL_IE_MSG_ID] = { TLV_TYPE_TV }, |
| 77 | [RSL_IE_SYSINFO_TYPE] = { TLV_TYPE_TV }, |
| 78 | [RSL_IE_MS_POWER_PARAM] = { TLV_TYPE_TLV }, |
| 79 | [RSL_IE_BS_POWER_PARAM] = { TLV_TYPE_TLV }, |
| 80 | [RSL_IE_PREPROC_PARAM] = { TLV_TYPE_TLV }, |
| 81 | [RSL_IE_PREPROC_MEAS] = { TLV_TYPE_TLV }, |
| 82 | [RSL_IE_IMM_ASS_INFO] = { TLV_TYPE_TLV }, |
| 83 | [RSL_IE_SMSCB_INFO] = { TLV_TYPE_FIXED, 23 }, |
| 84 | [RSL_IE_MS_TIMING_OFFSET] = { TLV_TYPE_TV }, |
| 85 | [RSL_IE_ERR_MSG] = { TLV_TYPE_TLV }, |
| 86 | [RSL_IE_FULL_BCCH_INFO] = { TLV_TYPE_TLV }, |
| 87 | [RSL_IE_CHAN_NEEDED] = { TLV_TYPE_TV }, |
| 88 | [RSL_IE_CB_CMD_TYPE] = { TLV_TYPE_TV }, |
| 89 | [RSL_IE_SMSCB_MSG] = { TLV_TYPE_TLV }, |
| 90 | [RSL_IE_FULL_IMM_ASS_INFO] = { TLV_TYPE_TLV }, |
| 91 | [RSL_IE_SACCH_INFO] = { TLV_TYPE_TLV }, |
| 92 | [RSL_IE_CBCH_LOAD_INFO] = { TLV_TYPE_TV }, |
| 93 | [RSL_IE_SMSCB_CHAN_INDICATOR] = { TLV_TYPE_TV }, |
| 94 | [RSL_IE_GROUP_CALL_REF] = { TLV_TYPE_TLV }, |
| 95 | [RSL_IE_CHAN_DESC] = { TLV_TYPE_TLV }, |
| 96 | [RSL_IE_NCH_DRX_INFO] = { TLV_TYPE_TLV }, |
| 97 | [RSL_IE_CMD_INDICATOR] = { TLV_TYPE_TLV }, |
| 98 | [RSL_IE_EMLPP_PRIO] = { TLV_TYPE_TV }, |
| 99 | [RSL_IE_UIC] = { TLV_TYPE_TLV }, |
| 100 | [RSL_IE_MAIN_CHAN_REF] = { TLV_TYPE_TV }, |
| 101 | [RSL_IE_MR_CONFIG] = { TLV_TYPE_TLV }, |
| 102 | [RSL_IE_MR_CONTROL] = { TLV_TYPE_TV }, |
| 103 | [RSL_IE_SUP_CODEC_TYPES] = { TLV_TYPE_TLV }, |
| 104 | [RSL_IE_CODEC_CONFIG] = { TLV_TYPE_TLV }, |
| 105 | [RSL_IE_RTD] = { TLV_TYPE_TV }, |
| 106 | [RSL_IE_TFO_STATUS] = { TLV_TYPE_TV }, |
| 107 | [RSL_IE_LLP_APDU] = { TLV_TYPE_TLV }, |
Harald Welte | 4684e63 | 2009-08-10 09:51:40 +0200 | [diff] [blame] | 108 | [RSL_IE_SIEMENS_MRPCI] = { TLV_TYPE_TV }, |
Harald Welte | 1610d30 | 2009-07-12 09:56:39 +0200 | [diff] [blame] | 109 | [RSL_IE_IPAC_PROXY_UDP] = { TLV_TYPE_FIXED, 2 }, |
| 110 | [RSL_IE_IPAC_BSCMPL_TOUT] = { TLV_TYPE_TV }, |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 111 | [RSL_IE_IPAC_REMOTE_IP] = { TLV_TYPE_FIXED, 4 }, |
| 112 | [RSL_IE_IPAC_REMOTE_PORT] = { TLV_TYPE_FIXED, 2 }, |
Harald Welte | 1610d30 | 2009-07-12 09:56:39 +0200 | [diff] [blame] | 113 | [RSL_IE_IPAC_RTP_PAYLOAD] = { TLV_TYPE_TV }, |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 114 | [RSL_IE_IPAC_LOCAL_PORT] = { TLV_TYPE_FIXED, 2 }, |
Harald Welte | b949895 | 2009-07-12 09:45:05 +0200 | [diff] [blame] | 115 | [RSL_IE_IPAC_SPEECH_MODE] = { TLV_TYPE_TV }, |
Harald Welte | 1610d30 | 2009-07-12 09:56:39 +0200 | [diff] [blame] | 116 | [RSL_IE_IPAC_LOCAL_IP] = { TLV_TYPE_FIXED, 4 }, |
Harald Welte | b949895 | 2009-07-12 09:45:05 +0200 | [diff] [blame] | 117 | [RSL_IE_IPAC_CONN_ID] = { TLV_TYPE_FIXED, 2 }, |
Harald Welte | 1610d30 | 2009-07-12 09:56:39 +0200 | [diff] [blame] | 118 | [RSL_IE_IPAC_RTP_CSD_FMT] = { TLV_TYPE_TV }, |
| 119 | [RSL_IE_IPAC_RTP_JIT_BUF] = { TLV_TYPE_FIXED, 2 }, |
| 120 | [RSL_IE_IPAC_RTP_COMPR] = { TLV_TYPE_TV }, |
Harald Welte | b949895 | 2009-07-12 09:45:05 +0200 | [diff] [blame] | 121 | [RSL_IE_IPAC_RTP_PAYLOAD2] = { TLV_TYPE_TV }, |
Harald Welte | 1610d30 | 2009-07-12 09:56:39 +0200 | [diff] [blame] | 122 | [RSL_IE_IPAC_RTP_MPLEX] = { TLV_TYPE_FIXED, 8 }, |
| 123 | [RSL_IE_IPAC_RTP_MPLEX_ID] = { TLV_TYPE_TV }, |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 124 | }, |
| 125 | }; |
| 126 | #define rsl_tlv_parse(dec, buf, len) \ |
| 127 | tlv_parse(dec, &rsl_att_tlvdef, buf, len, 0, 0) |
| 128 | |
| 129 | static u_int8_t mdisc_by_msgtype(u_int8_t msg_type) |
| 130 | { |
| 131 | /* mask off the transparent bit ? */ |
| 132 | msg_type &= 0xfe; |
| 133 | |
| 134 | if ((msg_type & 0xf0) == 0x00) |
| 135 | return ABIS_RSL_MDISC_RLL; |
| 136 | if ((msg_type & 0xf0) == 0x10) { |
| 137 | if (msg_type >= 0x19 && msg_type <= 0x22) |
| 138 | return ABIS_RSL_MDISC_TRX; |
| 139 | else |
| 140 | return ABIS_RSL_MDISC_COM_CHAN; |
| 141 | } |
| 142 | if ((msg_type & 0xe0) == 0x20) |
| 143 | return ABIS_RSL_MDISC_DED_CHAN; |
| 144 | |
| 145 | return ABIS_RSL_MDISC_LOC; |
| 146 | } |
| 147 | |
| 148 | static inline void init_dchan_hdr(struct abis_rsl_dchan_hdr *dh, |
| 149 | u_int8_t msg_type) |
| 150 | { |
| 151 | dh->c.msg_discr = mdisc_by_msgtype(msg_type); |
| 152 | dh->c.msg_type = msg_type; |
| 153 | dh->ie_chan = RSL_IE_CHAN_NR; |
| 154 | } |
| 155 | |
| 156 | static inline void init_llm_hdr(struct abis_rsl_rll_hdr *dh, |
| 157 | u_int8_t msg_type) |
| 158 | { |
| 159 | /* dh->c.msg_discr = mdisc_by_msgtype(msg_type); */ |
| 160 | dh->c.msg_discr = ABIS_RSL_MDISC_RLL; |
| 161 | dh->c.msg_type = msg_type; |
| 162 | dh->ie_chan = RSL_IE_CHAN_NR; |
| 163 | dh->ie_link_id = RSL_IE_LINK_IDENT; |
| 164 | } |
| 165 | |
| 166 | |
| 167 | /* encode channel number as per Section 9.3.1 */ |
| 168 | u_int8_t rsl_enc_chan_nr(u_int8_t type, u_int8_t subch, u_int8_t timeslot) |
| 169 | { |
| 170 | u_int8_t ret; |
| 171 | |
| 172 | ret = (timeslot & 0x07) | type; |
| 173 | |
| 174 | switch (type) { |
| 175 | case RSL_CHAN_Lm_ACCHs: |
| 176 | subch &= 0x01; |
| 177 | break; |
| 178 | case RSL_CHAN_SDCCH4_ACCH: |
| 179 | subch &= 0x07; |
| 180 | break; |
| 181 | case RSL_CHAN_SDCCH8_ACCH: |
| 182 | subch &= 0x07; |
| 183 | break; |
| 184 | default: |
| 185 | /* no subchannels allowed */ |
| 186 | subch = 0x00; |
| 187 | break; |
| 188 | } |
| 189 | ret |= (subch << 3); |
| 190 | |
| 191 | return ret; |
| 192 | } |
| 193 | |
| 194 | /* determine logical channel based on TRX and channel number IE */ |
| 195 | struct gsm_lchan *lchan_lookup(struct gsm_bts_trx *trx, u_int8_t chan_nr) |
| 196 | { |
| 197 | struct gsm_lchan *lchan; |
| 198 | u_int8_t ts_nr = chan_nr & 0x07; |
| 199 | u_int8_t cbits = chan_nr >> 3; |
| 200 | u_int8_t lch_idx; |
| 201 | struct gsm_bts_trx_ts *ts = &trx->ts[ts_nr]; |
| 202 | |
| 203 | if (cbits == 0x01) { |
| 204 | lch_idx = 0; /* TCH/F */ |
| 205 | if (ts->pchan != GSM_PCHAN_TCH_F) |
| 206 | fprintf(stderr, "chan_nr=0x%02x but pchan=%u\n", |
| 207 | chan_nr, ts->pchan); |
| 208 | } else if ((cbits & 0x1e) == 0x02) { |
| 209 | lch_idx = cbits & 0x1; /* TCH/H */ |
| 210 | if (ts->pchan != GSM_PCHAN_TCH_H) |
| 211 | fprintf(stderr, "chan_nr=0x%02x but pchan=%u\n", |
| 212 | chan_nr, ts->pchan); |
| 213 | } else if ((cbits & 0x1c) == 0x04) { |
| 214 | lch_idx = cbits & 0x3; /* SDCCH/4 */ |
| 215 | if (ts->pchan != GSM_PCHAN_CCCH_SDCCH4) |
| 216 | fprintf(stderr, "chan_nr=0x%02x but pchan=%u\n", |
| 217 | chan_nr, ts->pchan); |
| 218 | } else if ((cbits & 0x18) == 0x08) { |
| 219 | lch_idx = cbits & 0x7; /* SDCCH/8 */ |
| 220 | if (ts->pchan != GSM_PCHAN_SDCCH8_SACCH8C) |
| 221 | fprintf(stderr, "chan_nr=0x%02x but pchan=%u\n", |
| 222 | chan_nr, ts->pchan); |
| 223 | } else if (cbits == 0x10 || cbits == 0x11 || cbits == 0x12) { |
| 224 | lch_idx = 0; |
| 225 | if (ts->pchan != GSM_PCHAN_CCCH && |
| 226 | ts->pchan != GSM_PCHAN_CCCH_SDCCH4) |
| 227 | fprintf(stderr, "chan_nr=0x%02x but pchan=%u\n", |
| 228 | chan_nr, ts->pchan); |
| 229 | /* FIXME: we should not return first sdcch4 !!! */ |
| 230 | } else { |
| 231 | fprintf(stderr, "unknown chan_nr=0x%02x\n", chan_nr); |
| 232 | return NULL; |
| 233 | } |
| 234 | |
| 235 | lchan = &ts->lchan[lch_idx]; |
| 236 | |
| 237 | return lchan; |
| 238 | } |
| 239 | |
| 240 | u_int8_t lchan2chan_nr(struct gsm_lchan *lchan) |
| 241 | { |
| 242 | struct gsm_bts_trx_ts *ts = lchan->ts; |
| 243 | u_int8_t cbits, chan_nr; |
| 244 | |
| 245 | switch (ts->pchan) { |
| 246 | case GSM_PCHAN_TCH_F: |
| 247 | cbits = 0x01; |
| 248 | break; |
| 249 | case GSM_PCHAN_TCH_H: |
| 250 | cbits = 0x02; |
| 251 | cbits += lchan->nr; |
| 252 | break; |
| 253 | case GSM_PCHAN_CCCH_SDCCH4: |
| 254 | cbits = 0x04; |
| 255 | cbits += lchan->nr; |
| 256 | break; |
| 257 | case GSM_PCHAN_SDCCH8_SACCH8C: |
| 258 | cbits = 0x08; |
| 259 | cbits += lchan->nr; |
| 260 | break; |
| 261 | default: |
| 262 | case GSM_PCHAN_CCCH: |
| 263 | cbits = 0x10; |
| 264 | break; |
| 265 | } |
| 266 | |
| 267 | chan_nr = (cbits << 3) | (ts->nr & 0x7); |
| 268 | |
| 269 | return chan_nr; |
| 270 | } |
| 271 | |
| 272 | /* As per TS 03.03 Section 2.2, the IMSI has 'not more than 15 digits' */ |
| 273 | u_int64_t str_to_imsi(const char *imsi_str) |
| 274 | { |
| 275 | u_int64_t ret; |
| 276 | |
| 277 | ret = strtoull(imsi_str, NULL, 10); |
| 278 | |
| 279 | return ret; |
| 280 | } |
| 281 | |
| 282 | /* Table 5 Clause 7 TS 05.02 */ |
| 283 | unsigned int n_pag_blocks(int bs_ccch_sdcch_comb, unsigned int bs_ag_blks_res) |
| 284 | { |
| 285 | if (!bs_ccch_sdcch_comb) |
| 286 | return 9 - bs_ag_blks_res; |
| 287 | else |
| 288 | return 3 - bs_ag_blks_res; |
| 289 | } |
| 290 | |
| 291 | /* Chapter 6.5.2 of TS 05.02 */ |
| 292 | unsigned int get_ccch_group(u_int64_t imsi, unsigned int bs_cc_chans, |
| 293 | unsigned int n_pag_blocks) |
| 294 | { |
| 295 | return (imsi % 1000) % (bs_cc_chans * n_pag_blocks) / n_pag_blocks; |
| 296 | } |
| 297 | |
| 298 | /* Chapter 6.5.2 of TS 05.02 */ |
| 299 | unsigned int get_paging_group(u_int64_t imsi, unsigned int bs_cc_chans, |
| 300 | int n_pag_blocks) |
| 301 | { |
| 302 | return (imsi % 1000) % (bs_cc_chans * n_pag_blocks) % n_pag_blocks; |
| 303 | } |
| 304 | |
| 305 | static struct msgb *rsl_msgb_alloc(void) |
| 306 | { |
Harald Welte | 9cfc935 | 2009-06-26 19:39:35 +0200 | [diff] [blame] | 307 | return msgb_alloc_headroom(RSL_ALLOC_SIZE, RSL_ALLOC_HEADROOM, |
| 308 | "RSL"); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 309 | } |
| 310 | |
| 311 | #define MACBLOCK_SIZE 23 |
| 312 | static void pad_macblock(u_int8_t *out, const u_int8_t *in, int len) |
| 313 | { |
| 314 | memcpy(out, in, len); |
| 315 | |
| 316 | if (len < MACBLOCK_SIZE) |
| 317 | memset(out+len, 0x2b, MACBLOCK_SIZE-len); |
| 318 | } |
| 319 | |
Harald Welte | d2dd9de | 2009-08-30 15:37:11 +0900 | [diff] [blame] | 320 | /* Chapter 9.3.7: Encryption Information */ |
| 321 | static int build_encr_info(u_int8_t *out, struct gsm_lchan *lchan) |
| 322 | { |
| 323 | *out++ = lchan->encr.alg_id & 0xff; |
| 324 | if (lchan->encr.key_len) |
| 325 | memcpy(out, lchan->encr.key, lchan->encr.key_len); |
| 326 | return lchan->encr.key_len + 1; |
| 327 | } |
| 328 | |
| 329 | |
Harald Welte | f1a168d | 2009-07-28 17:58:09 +0200 | [diff] [blame] | 330 | static const char *rsl_err_vals[0xff] = { |
| 331 | [RSL_ERR_RADIO_IF_FAIL] = "Radio Interface Failure", |
| 332 | [RSL_ERR_RADIO_LINK_FAIL] = "Radio Link Failure", |
| 333 | [RSL_ERR_HANDOVER_ACC_FAIL] = "Handover Access Failure", |
| 334 | [RSL_ERR_TALKER_ACC_FAIL] = "Talker Access Failure", |
| 335 | [RSL_ERR_OM_INTERVENTION] = "O&M Intervention", |
| 336 | [RSL_ERR_NORMAL_UNSPEC] = "Normal event, unspecified", |
Harald Welte | b1717e9 | 2009-08-04 02:31:05 +0200 | [diff] [blame] | 337 | [RSL_ERR_T_MSRFPCI_EXP] = "Siemens: T_MSRFPCI Expired", |
Harald Welte | f1a168d | 2009-07-28 17:58:09 +0200 | [diff] [blame] | 338 | [RSL_ERR_EQUIPMENT_FAIL] = "Equipment Failure", |
| 339 | [RSL_ERR_RR_UNAVAIL] = "Radio Resource not available", |
| 340 | [RSL_ERR_TERR_CH_FAIL] = "Terrestrial Channel Failure", |
| 341 | [RSL_ERR_CCCH_OVERLOAD] = "CCCH Overload", |
| 342 | [RSL_ERR_ACCH_OVERLOAD] = "ACCH Overload", |
| 343 | [RSL_ERR_PROCESSOR_OVERLOAD] = "Processor Overload", |
| 344 | [RSL_ERR_RES_UNAVAIL] = "Resource not available, unspecified", |
| 345 | [RSL_ERR_TRANSC_UNAVAIL] = "Transcoding not available", |
| 346 | [RSL_ERR_SERV_OPT_UNAVAIL] = "Service or Option not available", |
| 347 | [RSL_ERR_ENCR_UNIMPL] = "Encryption algorithm not implemented", |
| 348 | [RSL_ERR_SERV_OPT_UNIMPL] = "Service or Option not implemented", |
| 349 | [RSL_ERR_RCH_ALR_ACTV_ALLOC] = "Radio channel already activated", |
| 350 | [RSL_ERR_INVALID_MESSAGE] = "Invalid Message, unspecified", |
| 351 | [RSL_ERR_MSG_DISCR] = "Message Discriminator Error", |
| 352 | [RSL_ERR_MSG_TYPE] = "Message Type Error", |
| 353 | [RSL_ERR_MSG_SEQ] = "Message Sequence Error", |
| 354 | [RSL_ERR_IE_ERROR] = "General IE error", |
| 355 | [RSL_ERR_MAND_IE_ERROR] = "Mandatory IE error", |
| 356 | [RSL_ERR_OPT_IE_ERROR] = "Optional IE error", |
| 357 | [RSL_ERR_IE_NONEXIST] = "IE non-existent", |
| 358 | [RSL_ERR_IE_LENGTH] = "IE length error", |
| 359 | [RSL_ERR_IE_CONTENT] = "IE content error", |
| 360 | [RSL_ERR_PROTO] = "Protocol error, unspecified", |
| 361 | [RSL_ERR_INTERWORKING] = "Interworking error, unspecified", |
| 362 | }; |
| 363 | |
| 364 | static const char *rsl_err_name(u_int8_t err) |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 365 | { |
Harald Welte | f1a168d | 2009-07-28 17:58:09 +0200 | [diff] [blame] | 366 | if (rsl_err_vals[err]) |
| 367 | return rsl_err_vals[err]; |
| 368 | else |
| 369 | return "unknown"; |
| 370 | } |
| 371 | |
| 372 | static void print_rsl_cause(const u_int8_t *cause_v, u_int8_t cause_len) |
| 373 | { |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 374 | int i; |
| 375 | |
Harald Welte | f1a168d | 2009-07-28 17:58:09 +0200 | [diff] [blame] | 376 | DEBUGPC(DRSL, "CAUSE=0x%02x(%s) ", |
| 377 | cause_v[0], rsl_err_name(cause_v[0])); |
| 378 | for (i = 1; i < cause_len-1; i++) |
| 379 | DEBUGPC(DRSL, "%02x ", cause_v[i]); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 380 | } |
| 381 | |
| 382 | /* Send a BCCH_INFO message as per Chapter 8.5.1 */ |
| 383 | int rsl_bcch_info(struct gsm_bts_trx *trx, u_int8_t type, |
| 384 | const u_int8_t *data, int len) |
| 385 | { |
| 386 | struct abis_rsl_dchan_hdr *dh; |
| 387 | struct msgb *msg = rsl_msgb_alloc(); |
| 388 | |
| 389 | dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof*dh); |
| 390 | init_dchan_hdr(dh, RSL_MT_BCCH_INFO); |
| 391 | dh->chan_nr = RSL_CHAN_BCCH; |
| 392 | |
| 393 | msgb_tv_put(msg, RSL_IE_SYSINFO_TYPE, type); |
| 394 | msgb_tlv_put(msg, RSL_IE_FULL_BCCH_INFO, len, data); |
| 395 | |
| 396 | msg->trx = trx; |
| 397 | |
| 398 | return abis_rsl_sendmsg(msg); |
| 399 | } |
| 400 | |
| 401 | int rsl_sacch_filling(struct gsm_bts_trx *trx, u_int8_t type, |
| 402 | const u_int8_t *data, int len) |
| 403 | { |
| 404 | struct abis_rsl_common_hdr *ch; |
| 405 | struct msgb *msg = rsl_msgb_alloc(); |
| 406 | |
| 407 | ch = (struct abis_rsl_common_hdr *) msgb_put(msg, sizeof(*ch)); |
| 408 | ch->msg_discr = ABIS_RSL_MDISC_TRX; |
| 409 | ch->msg_type = RSL_MT_SACCH_FILL; |
| 410 | |
| 411 | msgb_tv_put(msg, RSL_IE_SYSINFO_TYPE, type); |
| 412 | msgb_tl16v_put(msg, RSL_IE_L3_INFO, len, data); |
| 413 | |
| 414 | msg->trx = trx; |
| 415 | |
| 416 | return abis_rsl_sendmsg(msg); |
| 417 | } |
| 418 | |
Harald Welte | 91afe4c | 2009-06-20 18:15:19 +0200 | [diff] [blame] | 419 | int rsl_chan_bs_power_ctrl(struct gsm_lchan *lchan, unsigned int fpc, int db) |
| 420 | { |
| 421 | struct abis_rsl_dchan_hdr *dh; |
Harald Welte | ed83184 | 2009-06-27 03:09:08 +0200 | [diff] [blame] | 422 | struct msgb *msg; |
Harald Welte | 91afe4c | 2009-06-20 18:15:19 +0200 | [diff] [blame] | 423 | u_int8_t chan_nr = lchan2chan_nr(lchan); |
| 424 | |
| 425 | db = abs(db); |
| 426 | if (db > 30) |
| 427 | return -EINVAL; |
| 428 | |
Harald Welte | ed83184 | 2009-06-27 03:09:08 +0200 | [diff] [blame] | 429 | msg = rsl_msgb_alloc(); |
| 430 | |
Harald Welte | 91afe4c | 2009-06-20 18:15:19 +0200 | [diff] [blame] | 431 | lchan->bs_power = db/2; |
| 432 | if (fpc) |
| 433 | lchan->bs_power |= 0x10; |
| 434 | |
| 435 | dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh)); |
| 436 | init_dchan_hdr(dh, RSL_MT_BS_POWER_CONTROL); |
| 437 | dh->chan_nr = chan_nr; |
| 438 | |
| 439 | msgb_tv_put(msg, RSL_IE_BS_POWER, lchan->bs_power); |
| 440 | |
| 441 | msg->trx = lchan->ts->trx; |
| 442 | |
| 443 | return abis_rsl_sendmsg(msg); |
| 444 | } |
| 445 | |
Harald Welte | 91afe4c | 2009-06-20 18:15:19 +0200 | [diff] [blame] | 446 | int rsl_chan_ms_power_ctrl(struct gsm_lchan *lchan, unsigned int fpc, int dbm) |
| 447 | { |
| 448 | struct abis_rsl_dchan_hdr *dh; |
Harald Welte | ed83184 | 2009-06-27 03:09:08 +0200 | [diff] [blame] | 449 | struct msgb *msg; |
Harald Welte | 91afe4c | 2009-06-20 18:15:19 +0200 | [diff] [blame] | 450 | u_int8_t chan_nr = lchan2chan_nr(lchan); |
| 451 | int ctl_lvl; |
| 452 | |
Harald Welte | c4dcda0 | 2009-08-09 14:45:18 +0200 | [diff] [blame] | 453 | ctl_lvl = ms_pwr_ctl_lvl(lchan->ts->trx->bts->band, dbm); |
Harald Welte | 91afe4c | 2009-06-20 18:15:19 +0200 | [diff] [blame] | 454 | if (ctl_lvl < 0) |
| 455 | return ctl_lvl; |
| 456 | |
Harald Welte | ed83184 | 2009-06-27 03:09:08 +0200 | [diff] [blame] | 457 | msg = rsl_msgb_alloc(); |
| 458 | |
Harald Welte | 91afe4c | 2009-06-20 18:15:19 +0200 | [diff] [blame] | 459 | lchan->ms_power = ctl_lvl; |
| 460 | |
| 461 | if (fpc) |
| 462 | lchan->ms_power |= 0x20; |
| 463 | |
| 464 | dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh)); |
| 465 | init_dchan_hdr(dh, RSL_MT_MS_POWER_CONTROL); |
| 466 | dh->chan_nr = chan_nr; |
| 467 | |
| 468 | msgb_tv_put(msg, RSL_IE_MS_POWER, lchan->ms_power); |
| 469 | |
| 470 | msg->trx = lchan->ts->trx; |
| 471 | |
| 472 | return abis_rsl_sendmsg(msg); |
| 473 | } |
| 474 | |
Harald Welte | 39274f4 | 2009-07-29 15:41:29 +0200 | [diff] [blame] | 475 | static int channel_mode_from_lchan(struct rsl_ie_chan_mode *cm, |
| 476 | struct gsm_lchan *lchan) |
| 477 | { |
| 478 | memset(cm, 0, sizeof(cm)); |
| 479 | |
| 480 | /* FIXME: what to do with data calls ? */ |
| 481 | cm->dtx_dtu = 0x00; |
| 482 | |
| 483 | /* set TCH Speech/Data */ |
| 484 | cm->spd_ind = lchan->rsl_cmode; |
| 485 | |
| 486 | switch (lchan->type) { |
| 487 | case GSM_LCHAN_SDCCH: |
| 488 | cm->chan_rt = RSL_CMOD_CRT_SDCCH; |
| 489 | break; |
| 490 | case GSM_LCHAN_TCH_F: |
| 491 | cm->chan_rt = RSL_CMOD_CRT_TCH_Bm; |
| 492 | break; |
| 493 | case GSM_LCHAN_TCH_H: |
| 494 | cm->chan_rt = RSL_CMOD_CRT_TCH_Lm; |
| 495 | break; |
| 496 | case GSM_LCHAN_NONE: |
| 497 | case GSM_LCHAN_UNKNOWN: |
| 498 | default: |
| 499 | return -EINVAL; |
| 500 | } |
| 501 | |
| 502 | switch (lchan->tch_mode) { |
| 503 | case GSM48_CMODE_SIGN: |
| 504 | cm->chan_rate = 0; |
| 505 | break; |
| 506 | case GSM48_CMODE_SPEECH_V1: |
| 507 | cm->chan_rate = RSL_CMOD_SP_GSM1; |
| 508 | break; |
| 509 | case GSM48_CMODE_SPEECH_EFR: |
| 510 | cm->chan_rate = RSL_CMOD_SP_GSM2; |
| 511 | break; |
| 512 | case GSM48_CMODE_SPEECH_AMR: |
| 513 | cm->chan_rate = RSL_CMOD_SP_GSM3; |
| 514 | break; |
| 515 | case GSM48_CMODE_DATA_14k5: |
| 516 | cm->chan_rate = RSL_CMOD_SP_NT_14k5; |
| 517 | break; |
| 518 | case GSM48_CMODE_DATA_12k0: |
| 519 | cm->chan_rate = RSL_CMOD_SP_NT_12k0; |
| 520 | break; |
| 521 | case GSM48_CMODE_DATA_6k0: |
| 522 | cm->chan_rate = RSL_CMOD_SP_NT_6k0; |
| 523 | break; |
| 524 | default: |
| 525 | return -EINVAL; |
| 526 | } |
| 527 | |
| 528 | return 0; |
| 529 | } |
| 530 | |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 531 | /* Chapter 8.4.1 */ |
| 532 | #if 0 |
| 533 | int rsl_chan_activate(struct gsm_bts_trx *trx, u_int8_t chan_nr, |
| 534 | u_int8_t act_type, |
| 535 | struct rsl_ie_chan_mode *chan_mode, |
| 536 | struct rsl_ie_chan_ident *chan_ident, |
| 537 | u_int8_t bs_power, u_int8_t ms_power, |
| 538 | u_int8_t ta) |
| 539 | { |
| 540 | struct abis_rsl_dchan_hdr *dh; |
| 541 | struct msgb *msg = rsl_msgb_alloc(); |
| 542 | |
| 543 | dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh)); |
| 544 | init_dchan_hdr(dh, RSL_MT_CHAN_ACTIV); |
| 545 | dh->chan_nr = chan_nr; |
| 546 | |
| 547 | msgb_tv_put(msg, RSL_IE_ACT_TYPE, act_type); |
| 548 | /* For compatibility with Phase 1 */ |
| 549 | msgb_tlv_put(msg, RSL_IE_CHAN_MODE, sizeof(*chan_mode), |
| 550 | (u_int8_t *) chan_mode); |
| 551 | msgb_tlv_put(msg, RSL_IE_CHAN_IDENT, 4, |
| 552 | (u_int8_t *) chan_ident); |
| 553 | #if 0 |
| 554 | msgb_tlv_put(msg, RSL_IE_ENCR_INFO, 1, |
| 555 | (u_int8_t *) &encr_info); |
| 556 | #endif |
| 557 | msgb_tv_put(msg, RSL_IE_BS_POWER, bs_power); |
| 558 | msgb_tv_put(msg, RSL_IE_MS_POWER, ms_power); |
| 559 | msgb_tv_put(msg, RSL_IE_TIMING_ADVANCE, ta); |
| 560 | |
| 561 | msg->trx = trx; |
| 562 | |
| 563 | return abis_rsl_sendmsg(msg); |
| 564 | } |
| 565 | #endif |
| 566 | |
| 567 | int rsl_chan_activate_lchan(struct gsm_lchan *lchan, u_int8_t act_type, |
Harald Welte | 39274f4 | 2009-07-29 15:41:29 +0200 | [diff] [blame] | 568 | u_int8_t ta) |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 569 | { |
| 570 | struct abis_rsl_dchan_hdr *dh; |
Harald Welte | ed83184 | 2009-06-27 03:09:08 +0200 | [diff] [blame] | 571 | struct msgb *msg; |
Harald Welte | 39274f4 | 2009-07-29 15:41:29 +0200 | [diff] [blame] | 572 | int rc; |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 573 | |
| 574 | u_int8_t chan_nr = lchan2chan_nr(lchan); |
| 575 | u_int16_t arfcn = lchan->ts->trx->arfcn; |
| 576 | struct rsl_ie_chan_mode cm; |
| 577 | struct rsl_ie_chan_ident ci; |
| 578 | |
Harald Welte | 39274f4 | 2009-07-29 15:41:29 +0200 | [diff] [blame] | 579 | rc = channel_mode_from_lchan(&cm, lchan); |
| 580 | if (rc < 0) |
| 581 | return rc; |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 582 | |
| 583 | memset(&ci, 0, sizeof(ci)); |
| 584 | ci.chan_desc.iei = 0x64; |
| 585 | ci.chan_desc.chan_nr = chan_nr; |
| 586 | ci.chan_desc.oct3 = (lchan->ts->trx->bts->tsc << 5) | ((arfcn & 0x3ff) >> 8); |
| 587 | ci.chan_desc.oct4 = arfcn & 0xff; |
| 588 | |
Harald Welte | ed83184 | 2009-06-27 03:09:08 +0200 | [diff] [blame] | 589 | msg = rsl_msgb_alloc(); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 590 | dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh)); |
| 591 | init_dchan_hdr(dh, RSL_MT_CHAN_ACTIV); |
| 592 | dh->chan_nr = chan_nr; |
| 593 | |
| 594 | msgb_tv_put(msg, RSL_IE_ACT_TYPE, act_type); |
| 595 | /* For compatibility with Phase 1 */ |
| 596 | msgb_tlv_put(msg, RSL_IE_CHAN_MODE, sizeof(cm), |
| 597 | (u_int8_t *) &cm); |
| 598 | msgb_tlv_put(msg, RSL_IE_CHAN_IDENT, 4, |
| 599 | (u_int8_t *) &ci); |
Harald Welte | d2dd9de | 2009-08-30 15:37:11 +0900 | [diff] [blame] | 600 | |
| 601 | if (lchan->encr.alg_id > RSL_ENC_ALG_A5(0)) { |
| 602 | u_int8_t encr_info[MAX_A5_KEY_LEN+2]; |
| 603 | rc = build_encr_info(encr_info, lchan); |
| 604 | if (rc > 0) |
| 605 | msgb_tlv_put(msg, RSL_IE_ENCR_INFO, rc, encr_info); |
| 606 | } |
| 607 | |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 608 | msgb_tv_put(msg, RSL_IE_BS_POWER, lchan->bs_power); |
| 609 | msgb_tv_put(msg, RSL_IE_MS_POWER, lchan->ms_power); |
| 610 | msgb_tv_put(msg, RSL_IE_TIMING_ADVANCE, ta); |
| 611 | |
| 612 | msg->trx = lchan->ts->trx; |
| 613 | |
| 614 | return abis_rsl_sendmsg(msg); |
| 615 | } |
| 616 | |
Harald Welte | 8e77049 | 2009-07-29 11:38:15 +0200 | [diff] [blame] | 617 | /* Chapter 8.4.9: Modify channel mode on BTS side */ |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 618 | int rsl_chan_mode_modify_req(struct gsm_lchan *lchan) |
| 619 | { |
| 620 | struct abis_rsl_dchan_hdr *dh; |
Harald Welte | ed83184 | 2009-06-27 03:09:08 +0200 | [diff] [blame] | 621 | struct msgb *msg; |
Harald Welte | 39274f4 | 2009-07-29 15:41:29 +0200 | [diff] [blame] | 622 | int rc; |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 623 | |
| 624 | u_int8_t chan_nr = lchan2chan_nr(lchan); |
| 625 | struct rsl_ie_chan_mode cm; |
| 626 | |
Harald Welte | 39274f4 | 2009-07-29 15:41:29 +0200 | [diff] [blame] | 627 | rc = channel_mode_from_lchan(&cm, lchan); |
| 628 | if (rc < 0) |
| 629 | return rc; |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 630 | |
Harald Welte | ed83184 | 2009-06-27 03:09:08 +0200 | [diff] [blame] | 631 | msg = rsl_msgb_alloc(); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 632 | dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh)); |
| 633 | init_dchan_hdr(dh, RSL_MT_MODE_MODIFY_REQ); |
| 634 | dh->chan_nr = chan_nr; |
| 635 | |
| 636 | msgb_tlv_put(msg, RSL_IE_CHAN_MODE, sizeof(cm), |
| 637 | (u_int8_t *) &cm); |
Harald Welte | d2dd9de | 2009-08-30 15:37:11 +0900 | [diff] [blame] | 638 | |
| 639 | if (lchan->encr.alg_id > RSL_ENC_ALG_A5(0)) { |
| 640 | u_int8_t encr_info[MAX_A5_KEY_LEN+2]; |
| 641 | rc = build_encr_info(encr_info, lchan); |
| 642 | if (rc > 0) |
| 643 | msgb_tlv_put(msg, RSL_IE_ENCR_INFO, rc, encr_info); |
| 644 | } |
| 645 | |
| 646 | msg->trx = lchan->ts->trx; |
| 647 | |
| 648 | return abis_rsl_sendmsg(msg); |
| 649 | } |
| 650 | |
| 651 | /* Chapter 8.4.6: Send the encryption command with given L3 info */ |
| 652 | int rsl_encryption_cmd(struct msgb *msg) |
| 653 | { |
| 654 | struct abis_rsl_dchan_hdr *dh; |
| 655 | struct gsm_lchan *lchan = msg->lchan; |
| 656 | u_int8_t chan_nr = lchan2chan_nr(lchan); |
| 657 | u_int8_t encr_info[MAX_A5_KEY_LEN+2]; |
Sylvain Munaut | 01f1caf | 2009-09-27 11:13:18 +0200 | [diff] [blame] | 658 | u_int8_t l3_len = msg->len; |
Harald Welte | d2dd9de | 2009-08-30 15:37:11 +0900 | [diff] [blame] | 659 | int rc; |
| 660 | |
| 661 | /* First push the L3 IE tag and length */ |
| 662 | msgb_tv16_push(msg, RSL_IE_L3_INFO, l3_len); |
| 663 | |
| 664 | /* then the link identifier (SAPI0, main sign link) */ |
| 665 | msgb_tv_push(msg, RSL_IE_LINK_IDENT, 0); |
| 666 | |
| 667 | /* then encryption information */ |
| 668 | rc = build_encr_info(encr_info, lchan); |
| 669 | if (rc <= 0) |
| 670 | return rc; |
| 671 | msgb_tlv_push(msg, RSL_IE_ENCR_INFO, rc, encr_info); |
| 672 | |
| 673 | /* and finally the DCHAN header */ |
| 674 | dh = (struct abis_rsl_dchan_hdr *) msgb_push(msg, sizeof(*dh)); |
| 675 | init_dchan_hdr(dh, RSL_MT_ENCR_CMD); |
| 676 | dh->chan_nr = chan_nr; |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 677 | |
| 678 | msg->trx = lchan->ts->trx; |
| 679 | |
| 680 | return abis_rsl_sendmsg(msg); |
| 681 | } |
| 682 | |
Harald Welte | 85a163c | 2009-08-10 11:43:22 +0200 | [diff] [blame] | 683 | /* Chapter 8.4.5 / 4.6: Deactivate the SACCH after 04.08 RR CHAN RELEASE */ |
Harald Welte | afe3c23 | 2009-07-19 18:36:49 +0200 | [diff] [blame] | 684 | int rsl_deact_sacch(struct gsm_lchan *lchan) |
| 685 | { |
| 686 | struct abis_rsl_dchan_hdr *dh; |
| 687 | struct msgb *msg = rsl_msgb_alloc(); |
| 688 | |
| 689 | dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh)); |
| 690 | init_dchan_hdr(dh, RSL_MT_DEACTIVATE_SACCH); |
| 691 | dh->chan_nr = lchan2chan_nr(lchan); |
| 692 | |
| 693 | msg->lchan = lchan; |
| 694 | msg->trx = lchan->ts->trx; |
| 695 | |
| 696 | DEBUGP(DRSL, "DEACTivate SACCH CMD channel=%s chan_nr=0x%02x\n", |
| 697 | gsm_ts_name(lchan->ts), dh->chan_nr); |
| 698 | |
| 699 | return abis_rsl_sendmsg(msg); |
| 700 | } |
| 701 | |
Harald Welte | 85a163c | 2009-08-10 11:43:22 +0200 | [diff] [blame] | 702 | /* Chapter 8.4.14 / 4.7: Tell BTS to release the radio channel */ |
| 703 | int rsl_rf_chan_release(struct gsm_lchan *lchan) |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 704 | { |
| 705 | struct abis_rsl_dchan_hdr *dh; |
| 706 | struct msgb *msg = rsl_msgb_alloc(); |
| 707 | |
| 708 | dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh)); |
| 709 | init_dchan_hdr(dh, RSL_MT_RF_CHAN_REL); |
| 710 | dh->chan_nr = lchan2chan_nr(lchan); |
| 711 | |
| 712 | msg->lchan = lchan; |
| 713 | msg->trx = lchan->ts->trx; |
| 714 | |
Harald Welte | 85a163c | 2009-08-10 11:43:22 +0200 | [diff] [blame] | 715 | DEBUGP(DRSL, "RF Channel Release CMD channel=%s chan_nr=0x%02x\n", |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 716 | gsm_ts_name(lchan->ts), dh->chan_nr); |
| 717 | |
Harald Welte | 85a163c | 2009-08-10 11:43:22 +0200 | [diff] [blame] | 718 | /* BTS will respond by RF CHAN REL ACK */ |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 719 | return abis_rsl_sendmsg(msg); |
| 720 | } |
| 721 | |
| 722 | int rsl_paging_cmd(struct gsm_bts *bts, u_int8_t paging_group, u_int8_t len, |
| 723 | u_int8_t *ms_ident, u_int8_t chan_needed) |
| 724 | { |
| 725 | struct abis_rsl_dchan_hdr *dh; |
| 726 | struct msgb *msg = rsl_msgb_alloc(); |
| 727 | |
| 728 | dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh)); |
| 729 | init_dchan_hdr(dh, RSL_MT_PAGING_CMD); |
| 730 | dh->chan_nr = RSL_CHAN_PCH_AGCH; |
| 731 | |
| 732 | msgb_tv_put(msg, RSL_IE_PAGING_GROUP, paging_group); |
| 733 | msgb_tlv_put(msg, RSL_IE_MS_IDENTITY, len-2, ms_ident+2); |
| 734 | msgb_tv_put(msg, RSL_IE_CHAN_NEEDED, chan_needed); |
| 735 | |
| 736 | msg->trx = bts->c0; |
| 737 | |
| 738 | return abis_rsl_sendmsg(msg); |
| 739 | } |
| 740 | |
| 741 | int rsl_paging_cmd_subscr(struct gsm_bts *bts, u_int8_t chan_need, |
| 742 | struct gsm_subscriber *subscr) |
| 743 | { |
| 744 | #if 0 |
| 745 | u_int8_t mi[128]; |
| 746 | unsigned int mi_len; |
| 747 | u_int8_t paging_group; |
| 748 | #endif |
| 749 | |
| 750 | return -1; |
| 751 | } |
| 752 | |
| 753 | int imsi_str2bcd(u_int8_t *bcd_out, const char *str_in) |
| 754 | { |
| 755 | int i, len = strlen(str_in); |
| 756 | |
| 757 | for (i = 0; i < len; i++) { |
| 758 | int num = str_in[i] - 0x30; |
| 759 | if (num < 0 || num > 9) |
| 760 | return -1; |
| 761 | if (i % 2 == 0) |
| 762 | bcd_out[i/2] = num; |
| 763 | else |
| 764 | bcd_out[i/2] |= (num << 4); |
| 765 | } |
| 766 | |
| 767 | return 0; |
| 768 | } |
| 769 | |
| 770 | /* Chapter 8.5.6 */ |
| 771 | int rsl_imm_assign_cmd(struct gsm_bts *bts, u_int8_t len, u_int8_t *val) |
| 772 | { |
| 773 | struct msgb *msg = rsl_msgb_alloc(); |
| 774 | struct abis_rsl_dchan_hdr *dh; |
| 775 | u_int8_t buf[MACBLOCK_SIZE]; |
| 776 | |
| 777 | dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh)); |
| 778 | init_dchan_hdr(dh, RSL_MT_IMMEDIATE_ASSIGN_CMD); |
| 779 | dh->chan_nr = RSL_CHAN_PCH_AGCH; |
| 780 | |
| 781 | switch (bts->type) { |
| 782 | case GSM_BTS_TYPE_BS11: |
| 783 | msgb_tlv_put(msg, RSL_IE_IMM_ASS_INFO, len, val); |
| 784 | break; |
| 785 | default: |
| 786 | /* If phase 2, construct a FULL_IMM_ASS_INFO */ |
| 787 | pad_macblock(buf, val, len); |
| 788 | msgb_tlv_put(msg, RSL_IE_FULL_IMM_ASS_INFO, MACBLOCK_SIZE, buf); |
| 789 | break; |
| 790 | } |
| 791 | |
| 792 | msg->trx = bts->c0; |
| 793 | |
| 794 | return abis_rsl_sendmsg(msg); |
| 795 | } |
| 796 | |
Harald Welte | 4684e63 | 2009-08-10 09:51:40 +0200 | [diff] [blame] | 797 | /* Send Siemens specific MS RF Power Capability Indication */ |
Harald Welte | 1209075 | 2009-08-10 10:07:33 +0200 | [diff] [blame] | 798 | int rsl_siemens_mrpci(struct gsm_lchan *lchan, struct rsl_mrpci *mrpci) |
Harald Welte | 4684e63 | 2009-08-10 09:51:40 +0200 | [diff] [blame] | 799 | { |
| 800 | struct msgb *msg = rsl_msgb_alloc(); |
| 801 | struct abis_rsl_dchan_hdr *dh; |
| 802 | |
| 803 | dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh)); |
| 804 | init_dchan_hdr(dh, RSL_MT_SIEMENS_MRPCI); |
Harald Welte | 874a5b4 | 2009-08-10 11:26:14 +0200 | [diff] [blame] | 805 | dh->c.msg_discr = ABIS_RSL_MDISC_DED_CHAN; |
Harald Welte | 4684e63 | 2009-08-10 09:51:40 +0200 | [diff] [blame] | 806 | dh->chan_nr = lchan2chan_nr(lchan); |
Harald Welte | 1209075 | 2009-08-10 10:07:33 +0200 | [diff] [blame] | 807 | msgb_tv_put(msg, RSL_IE_SIEMENS_MRPCI, *(u_int8_t *)mrpci); |
Harald Welte | 4684e63 | 2009-08-10 09:51:40 +0200 | [diff] [blame] | 808 | |
Harald Welte | 874a5b4 | 2009-08-10 11:26:14 +0200 | [diff] [blame] | 809 | DEBUGP(DRSL, "channel=%s chan_nr=0x%02x TX Siemens MRPCI 0x%02x\n", |
| 810 | gsm_ts_name(lchan->ts), dh->chan_nr, *(u_int8_t *)mrpci); |
| 811 | |
| 812 | msg->trx = lchan->ts->trx; |
| 813 | |
Harald Welte | 4684e63 | 2009-08-10 09:51:40 +0200 | [diff] [blame] | 814 | return abis_rsl_sendmsg(msg); |
| 815 | } |
| 816 | |
| 817 | |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 818 | /* Send "DATA REQUEST" message with given L3 Info payload */ |
| 819 | /* Chapter 8.3.1 */ |
| 820 | int rsl_data_request(struct msgb *msg, u_int8_t link_id) |
| 821 | { |
| 822 | u_int8_t l3_len = msg->tail - (u_int8_t *)msgb_l3(msg); |
| 823 | struct abis_rsl_rll_hdr *rh; |
| 824 | |
| 825 | if (msg->lchan == NULL) { |
| 826 | fprintf(stderr, "cannot send DATA REQUEST to unknown lchan\n"); |
| 827 | return -EINVAL; |
| 828 | } |
| 829 | |
| 830 | /* First push the L3 IE tag and length */ |
| 831 | msgb_tv16_push(msg, RSL_IE_L3_INFO, l3_len); |
| 832 | |
| 833 | /* Then push the RSL header */ |
| 834 | rh = (struct abis_rsl_rll_hdr *) msgb_push(msg, sizeof(*rh)); |
| 835 | init_llm_hdr(rh, RSL_MT_DATA_REQ); |
| 836 | rh->c.msg_discr |= ABIS_RSL_MDISC_TRANSP; |
| 837 | rh->chan_nr = lchan2chan_nr(msg->lchan); |
| 838 | rh->link_id = link_id; |
| 839 | |
| 840 | msg->trx = msg->lchan->ts->trx; |
| 841 | |
| 842 | return abis_rsl_sendmsg(msg); |
| 843 | } |
| 844 | |
Harald Welte | ed9a5ab | 2009-08-09 13:47:35 +0200 | [diff] [blame] | 845 | /* Send "ESTABLISH REQUEST" message with given L3 Info payload */ |
| 846 | /* Chapter 8.3.1 */ |
| 847 | int rsl_establish_request(struct gsm_lchan *lchan, u_int8_t link_id) |
| 848 | { |
| 849 | struct msgb *msg = rsl_msgb_alloc(); |
| 850 | struct abis_rsl_rll_hdr *rh; |
| 851 | |
| 852 | rh = (struct abis_rsl_rll_hdr *) msgb_put(msg, sizeof(*rh)); |
Harald Welte | 6140217 | 2009-08-09 14:13:58 +0200 | [diff] [blame] | 853 | init_llm_hdr(rh, RSL_MT_EST_REQ); |
Harald Welte | ed9a5ab | 2009-08-09 13:47:35 +0200 | [diff] [blame] | 854 | //rh->c.msg_discr |= ABIS_RSL_MDISC_TRANSP; |
| 855 | rh->chan_nr = lchan2chan_nr(lchan); |
| 856 | rh->link_id = link_id; |
| 857 | |
| 858 | msg->trx = lchan->ts->trx; |
| 859 | |
| 860 | return abis_rsl_sendmsg(msg); |
| 861 | } |
| 862 | |
Harald Welte | 0f2e3c1 | 2009-08-08 13:15:07 +0200 | [diff] [blame] | 863 | /* Chapter 8.3.7 Request the release of multiframe mode of RLL connection. |
| 864 | This is what higher layers should call. The BTS then responds with |
| 865 | RELEASE CONFIRM, which we in turn use to trigger RSL CHANNEL RELEASE, |
| 866 | which in turn is acknowledged by RSL CHANNEL RELEASE ACK, which calls |
| 867 | lchan_free() */ |
| 868 | int rsl_release_request(struct gsm_lchan *lchan, u_int8_t link_id) |
| 869 | { |
| 870 | struct msgb *msg = rsl_msgb_alloc(); |
| 871 | struct abis_rsl_rll_hdr *rh; |
| 872 | |
| 873 | rh = (struct abis_rsl_rll_hdr *) msgb_put(msg, sizeof(*rh)); |
| 874 | init_llm_hdr(rh, RSL_MT_REL_REQ); |
| 875 | //rh->c.msg_discr |= ABIS_RSL_MDISC_TRANSP; |
| 876 | rh->chan_nr = lchan2chan_nr(lchan); |
| 877 | rh->link_id = link_id; |
Harald Welte | ad73856 | 2009-08-10 00:19:36 +0200 | [diff] [blame] | 878 | msgb_tv_put(msg, RSL_IE_RELEASE_MODE, 0); /* normal release */ |
Harald Welte | 0f2e3c1 | 2009-08-08 13:15:07 +0200 | [diff] [blame] | 879 | |
| 880 | msg->trx = lchan->ts->trx; |
| 881 | |
| 882 | return abis_rsl_sendmsg(msg); |
| 883 | } |
| 884 | |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 885 | /* Chapter 8.4.2: Channel Activate Acknowledge */ |
| 886 | static int rsl_rx_chan_act_ack(struct msgb *msg) |
| 887 | { |
| 888 | struct abis_rsl_dchan_hdr *rslh = msgb_l2(msg); |
| 889 | |
| 890 | /* BTS has confirmed channel activation, we now need |
| 891 | * to assign the activated channel to the MS */ |
| 892 | if (rslh->ie_chan != RSL_IE_CHAN_NR) |
| 893 | return -EINVAL; |
| 894 | |
| 895 | return 0; |
| 896 | } |
| 897 | |
| 898 | /* Chapter 8.4.3: Channel Activate NACK */ |
| 899 | static int rsl_rx_chan_act_nack(struct msgb *msg) |
| 900 | { |
| 901 | struct abis_rsl_dchan_hdr *dh = msgb_l2(msg); |
| 902 | struct tlv_parsed tp; |
| 903 | |
| 904 | /* BTS has rejected channel activation ?!? */ |
| 905 | if (dh->ie_chan != RSL_IE_CHAN_NR) |
| 906 | return -EINVAL; |
| 907 | |
| 908 | rsl_tlv_parse(&tp, dh->data, msgb_l2len(msg)-sizeof(*dh)); |
| 909 | if (TLVP_PRESENT(&tp, RSL_IE_CAUSE)) |
Harald Welte | f1a168d | 2009-07-28 17:58:09 +0200 | [diff] [blame] | 910 | print_rsl_cause(TLVP_VAL(&tp, RSL_IE_CAUSE), |
| 911 | TLVP_LEN(&tp, RSL_IE_CAUSE)); |
| 912 | |
Harald Welte | cddb980 | 2009-08-09 19:50:08 +0200 | [diff] [blame] | 913 | lchan_free(msg->lchan); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 914 | return 0; |
| 915 | } |
| 916 | |
| 917 | /* Chapter 8.4.4: Connection Failure Indication */ |
| 918 | static int rsl_rx_conn_fail(struct msgb *msg) |
| 919 | { |
| 920 | struct abis_rsl_dchan_hdr *dh = msgb_l2(msg); |
| 921 | struct tlv_parsed tp; |
| 922 | |
| 923 | DEBUGPC(DRSL, "CONNECTION FAIL: "); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 924 | |
| 925 | rsl_tlv_parse(&tp, dh->data, msgb_l2len(msg)-sizeof(*dh)); |
| 926 | |
Harald Welte | f1a168d | 2009-07-28 17:58:09 +0200 | [diff] [blame] | 927 | if (TLVP_PRESENT(&tp, RSL_IE_CAUSE)) |
| 928 | print_rsl_cause(TLVP_VAL(&tp, RSL_IE_CAUSE), |
| 929 | TLVP_LEN(&tp, RSL_IE_CAUSE)); |
| 930 | |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 931 | DEBUGPC(DRSL, "RELEASING.\n"); |
| 932 | |
| 933 | /* FIXME: only free it after channel release ACK */ |
Harald Welte | 85a163c | 2009-08-10 11:43:22 +0200 | [diff] [blame] | 934 | return rsl_rf_chan_release(msg->lchan); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 935 | } |
| 936 | |
| 937 | static int rsl_rx_meas_res(struct msgb *msg) |
| 938 | { |
| 939 | struct abis_rsl_dchan_hdr *dh = msgb_l2(msg); |
| 940 | struct tlv_parsed tp; |
| 941 | |
Harald Welte | 0299368 | 2009-06-27 02:53:10 +0200 | [diff] [blame] | 942 | DEBUGPC(DMEAS, "MEASUREMENT RESULT "); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 943 | rsl_tlv_parse(&tp, dh->data, msgb_l2len(msg)-sizeof(*dh)); |
| 944 | |
| 945 | if (TLVP_PRESENT(&tp, RSL_IE_MEAS_RES_NR)) |
Harald Welte | 0299368 | 2009-06-27 02:53:10 +0200 | [diff] [blame] | 946 | DEBUGPC(DMEAS, "NR=%d ", *TLVP_VAL(&tp, RSL_IE_MEAS_RES_NR)); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 947 | if (TLVP_PRESENT(&tp, RSL_IE_UPLINK_MEAS)) { |
| 948 | u_int8_t len = TLVP_LEN(&tp, RSL_IE_UPLINK_MEAS); |
| 949 | const u_int8_t *val = TLVP_VAL(&tp, RSL_IE_UPLINK_MEAS); |
| 950 | if (len >= 3) { |
| 951 | if (val[0] & 0x40) |
Harald Welte | 0299368 | 2009-06-27 02:53:10 +0200 | [diff] [blame] | 952 | DEBUGPC(DMEAS, "DTXd "); |
| 953 | DEBUGPC(DMEAS, "RXL-FULL-up=%d RXL-SUB-up=%d ", |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 954 | val[0] & 0x3f, val[1] & 0x3f); |
Harald Welte | 0299368 | 2009-06-27 02:53:10 +0200 | [diff] [blame] | 955 | DEBUGPC(DMEAS, "RXQ-FULL-up=%d RXQ-SUB-up=%d ", |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 956 | val[2]>>3 & 0x7, val[2] & 0x7); |
| 957 | } |
| 958 | } |
| 959 | if (TLVP_PRESENT(&tp, RSL_IE_BS_POWER)) |
Harald Welte | 0299368 | 2009-06-27 02:53:10 +0200 | [diff] [blame] | 960 | DEBUGPC(DMEAS, "BS_POWER=%d ", *TLVP_VAL(&tp, RSL_IE_BS_POWER)); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 961 | if (TLVP_PRESENT(&tp, RSL_IE_MS_TIMING_OFFSET)) |
Harald Welte | 0299368 | 2009-06-27 02:53:10 +0200 | [diff] [blame] | 962 | DEBUGPC(DMEAS, "MS_TO=%d ", |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 963 | *TLVP_VAL(&tp, RSL_IE_MS_TIMING_OFFSET)); |
Harald Welte | a1467eb | 2009-06-20 18:44:35 +0200 | [diff] [blame] | 964 | if (TLVP_PRESENT(&tp, RSL_IE_L1_INFO)) { |
Harald Welte | b949895 | 2009-07-12 09:45:05 +0200 | [diff] [blame] | 965 | const u_int8_t *val = TLVP_VAL(&tp, RSL_IE_L1_INFO); |
Harald Welte | a1467eb | 2009-06-20 18:44:35 +0200 | [diff] [blame] | 966 | u_int8_t pwr_lvl = val[0] >> 3; |
Harald Welte | 0299368 | 2009-06-27 02:53:10 +0200 | [diff] [blame] | 967 | DEBUGPC(DMEAS, "L1_MS_PWR=%ddBm ", |
Harald Welte | a1467eb | 2009-06-20 18:44:35 +0200 | [diff] [blame] | 968 | ms_pwr_dbm(msg->trx->bts->band, pwr_lvl)); |
Harald Welte | 0299368 | 2009-06-27 02:53:10 +0200 | [diff] [blame] | 969 | DEBUGPC(DMEAS, "L1_FPC=%u ", val[0] & 0x04 ? 1 : 0); |
| 970 | DEBUGPC(DMEAS, "L1_TA=%u ", val[1]); |
Harald Welte | a1467eb | 2009-06-20 18:44:35 +0200 | [diff] [blame] | 971 | } |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 972 | if (TLVP_PRESENT(&tp, RSL_IE_L3_INFO)) { |
Harald Welte | 0299368 | 2009-06-27 02:53:10 +0200 | [diff] [blame] | 973 | DEBUGPC(DMEAS, "L3\n"); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 974 | msg->l3h = TLVP_VAL(&tp, RSL_IE_L3_INFO); |
Harald Welte (local) | 64994ce | 2009-08-14 11:41:12 +0200 | [diff] [blame] | 975 | return gsm0408_rcvmsg(msg, 0); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 976 | } else |
Harald Welte | 0299368 | 2009-06-27 02:53:10 +0200 | [diff] [blame] | 977 | DEBUGPC(DMEAS, "\n"); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 978 | |
| 979 | return 0; |
| 980 | } |
| 981 | |
| 982 | static int abis_rsl_rx_dchan(struct msgb *msg) |
| 983 | { |
| 984 | struct abis_rsl_dchan_hdr *rslh = msgb_l2(msg); |
| 985 | int rc = 0; |
| 986 | char *ts_name; |
| 987 | |
| 988 | msg->lchan = lchan_lookup(msg->trx, rslh->chan_nr); |
| 989 | ts_name = gsm_ts_name(msg->lchan->ts); |
| 990 | |
Harald Welte | 0299368 | 2009-06-27 02:53:10 +0200 | [diff] [blame] | 991 | if (rslh->c.msg_type != RSL_MT_MEAS_RES) |
| 992 | DEBUGP(DRSL, "channel=%s chan_nr=0x%02x ", ts_name, rslh->chan_nr); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 993 | |
| 994 | switch (rslh->c.msg_type) { |
| 995 | case RSL_MT_CHAN_ACTIV_ACK: |
| 996 | DEBUGPC(DRSL, "CHANNEL ACTIVATE ACK\n"); |
| 997 | rc = rsl_rx_chan_act_ack(msg); |
| 998 | break; |
| 999 | case RSL_MT_CHAN_ACTIV_NACK: |
| 1000 | DEBUGPC(DRSL, "CHANNEL ACTIVATE NACK\n"); |
| 1001 | rc = rsl_rx_chan_act_nack(msg); |
| 1002 | break; |
| 1003 | case RSL_MT_CONN_FAIL: |
| 1004 | rc = rsl_rx_conn_fail(msg); |
| 1005 | break; |
| 1006 | case RSL_MT_MEAS_RES: |
| 1007 | rc = rsl_rx_meas_res(msg); |
| 1008 | break; |
| 1009 | case RSL_MT_RF_CHAN_REL_ACK: |
| 1010 | DEBUGPC(DRSL, "RF CHANNEL RELEASE ACK\n"); |
| 1011 | lchan_free(msg->lchan); |
| 1012 | break; |
| 1013 | case RSL_MT_MODE_MODIFY_ACK: |
| 1014 | DEBUGPC(DRSL, "CHANNEL MODE MODIFY ACK\n"); |
| 1015 | break; |
| 1016 | case RSL_MT_MODE_MODIFY_NACK: |
| 1017 | DEBUGPC(DRSL, "CHANNEL MODE MODIFY NACK\n"); |
| 1018 | break; |
| 1019 | case RSL_MT_PHY_CONTEXT_CONF: |
| 1020 | case RSL_MT_PREPROC_MEAS_RES: |
| 1021 | case RSL_MT_TALKER_DET: |
| 1022 | case RSL_MT_LISTENER_DET: |
| 1023 | case RSL_MT_REMOTE_CODEC_CONF_REP: |
| 1024 | case RSL_MT_MR_CODEC_MOD_ACK: |
| 1025 | case RSL_MT_MR_CODEC_MOD_NACK: |
| 1026 | case RSL_MT_MR_CODEC_MOD_PER: |
| 1027 | DEBUGPC(DRSL, "Unimplemented Abis RSL DChan msg 0x%02x\n", |
| 1028 | rslh->c.msg_type); |
| 1029 | break; |
| 1030 | default: |
| 1031 | DEBUGPC(DRSL, "unknown Abis RSL DChan msg 0x%02x\n", |
| 1032 | rslh->c.msg_type); |
| 1033 | return -EINVAL; |
| 1034 | } |
| 1035 | |
| 1036 | return rc; |
| 1037 | } |
| 1038 | |
| 1039 | static int rsl_rx_error_rep(struct msgb *msg) |
| 1040 | { |
| 1041 | struct abis_rsl_common_hdr *rslh = msgb_l2(msg); |
Harald Welte | f1a168d | 2009-07-28 17:58:09 +0200 | [diff] [blame] | 1042 | struct tlv_parsed tp; |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1043 | |
| 1044 | DEBUGP(DRSL, "ERROR REPORT "); |
Harald Welte | f1a168d | 2009-07-28 17:58:09 +0200 | [diff] [blame] | 1045 | |
| 1046 | rsl_tlv_parse(&tp, rslh->data, msgb_l2len(msg)-sizeof(*rslh)); |
| 1047 | |
| 1048 | if (TLVP_PRESENT(&tp, RSL_IE_CAUSE)) |
| 1049 | print_rsl_cause(TLVP_VAL(&tp, RSL_IE_CAUSE), |
| 1050 | TLVP_LEN(&tp, RSL_IE_CAUSE)); |
| 1051 | |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1052 | DEBUGPC(DRSL, "\n"); |
| 1053 | |
| 1054 | return 0; |
| 1055 | } |
| 1056 | |
| 1057 | static int abis_rsl_rx_trx(struct msgb *msg) |
| 1058 | { |
| 1059 | struct abis_rsl_common_hdr *rslh = msgb_l2(msg); |
| 1060 | int rc = 0; |
| 1061 | |
| 1062 | switch (rslh->msg_type) { |
| 1063 | case RSL_MT_ERROR_REPORT: |
| 1064 | rc = rsl_rx_error_rep(msg); |
| 1065 | break; |
| 1066 | case RSL_MT_RF_RES_IND: |
| 1067 | /* interference on idle channels of TRX */ |
| 1068 | //DEBUGP(DRSL, "TRX: RF Interference Indication\n"); |
| 1069 | break; |
| 1070 | case RSL_MT_OVERLOAD: |
| 1071 | /* indicate CCCH / ACCH / processor overload */ |
| 1072 | DEBUGP(DRSL, "TRX: CCCH/ACCH/CPU Overload\n"); |
| 1073 | break; |
| 1074 | default: |
| 1075 | DEBUGP(DRSL, "Unknown Abis RSL TRX message type 0x%02x\n", |
| 1076 | rslh->msg_type); |
| 1077 | return -EINVAL; |
| 1078 | } |
| 1079 | return rc; |
| 1080 | } |
| 1081 | |
Harald Welte | 427dbc4 | 2009-08-10 00:26:10 +0200 | [diff] [blame] | 1082 | /* If T3101 expires, we never received a response to IMMEDIATE ASSIGN */ |
| 1083 | static void t3101_expired(void *data) |
| 1084 | { |
| 1085 | struct gsm_lchan *lchan = data; |
| 1086 | |
Harald Welte | 85a163c | 2009-08-10 11:43:22 +0200 | [diff] [blame] | 1087 | rsl_rf_chan_release(lchan); |
Harald Welte | 427dbc4 | 2009-08-10 00:26:10 +0200 | [diff] [blame] | 1088 | } |
| 1089 | |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1090 | /* MS has requested a channel on the RACH */ |
| 1091 | static int rsl_rx_chan_rqd(struct msgb *msg) |
| 1092 | { |
| 1093 | struct gsm_bts *bts = msg->trx->bts; |
| 1094 | struct abis_rsl_dchan_hdr *rqd_hdr = msgb_l2(msg); |
| 1095 | struct gsm48_req_ref *rqd_ref; |
| 1096 | struct gsm48_imm_ass ia; |
| 1097 | enum gsm_chan_t lctype; |
| 1098 | enum gsm_chreq_reason_t chreq_reason; |
| 1099 | struct gsm_lchan *lchan; |
| 1100 | u_int8_t rqd_ta; |
| 1101 | int ret; |
| 1102 | |
| 1103 | u_int16_t arfcn; |
| 1104 | u_int8_t ts_number, subch; |
| 1105 | |
| 1106 | /* parse request reference to be used in immediate assign */ |
| 1107 | if (rqd_hdr->data[0] != RSL_IE_REQ_REFERENCE) |
| 1108 | return -EINVAL; |
| 1109 | |
| 1110 | rqd_ref = (struct gsm48_req_ref *) &rqd_hdr->data[1]; |
| 1111 | |
| 1112 | /* parse access delay and use as TA */ |
| 1113 | if (rqd_hdr->data[sizeof(struct gsm48_req_ref)+1] != RSL_IE_ACCESS_DELAY) |
| 1114 | return -EINVAL; |
| 1115 | rqd_ta = rqd_hdr->data[sizeof(struct gsm48_req_ref)+2]; |
| 1116 | |
| 1117 | /* determine channel type (SDCCH/TCH_F/TCH_H) based on |
| 1118 | * request reference RA */ |
| 1119 | lctype = get_ctype_by_chreq(bts, rqd_ref->ra); |
| 1120 | chreq_reason = get_reason_by_chreq(bts, rqd_ref->ra); |
| 1121 | |
| 1122 | /* check availability / allocate channel */ |
| 1123 | lchan = lchan_alloc(bts, lctype); |
| 1124 | if (!lchan) { |
| 1125 | fprintf(stderr, "CHAN RQD: no resources\n"); |
| 1126 | /* FIXME: send some kind of reject ?!? */ |
| 1127 | return -ENOMEM; |
| 1128 | } |
| 1129 | |
| 1130 | ts_number = lchan->ts->nr; |
| 1131 | arfcn = lchan->ts->trx->arfcn; |
| 1132 | subch = lchan->nr; |
| 1133 | |
Harald Welte | d2dd9de | 2009-08-30 15:37:11 +0900 | [diff] [blame] | 1134 | lchan->encr.alg_id = RSL_ENC_ALG_A5(0); /* no encryption */ |
Harald Welte (local) | cbd4610 | 2009-08-13 10:14:26 +0200 | [diff] [blame] | 1135 | lchan->ms_power = ms_pwr_ctl_lvl(bts->band, bts->ms_max_power); |
Harald Welte | 9a229e1 | 2009-08-10 00:45:40 +0200 | [diff] [blame] | 1136 | lchan->bs_power = 0; /* 0dB reduction, output power = Pn */ |
Harald Welte | 39274f4 | 2009-07-29 15:41:29 +0200 | [diff] [blame] | 1137 | lchan->rsl_cmode = RSL_CMOD_SPD_SIGN; |
Harald Welte | 77234e1 | 2009-08-28 23:28:28 +0900 | [diff] [blame] | 1138 | lchan->tch_mode = GSM48_CMODE_SIGN; |
Harald Welte | 39274f4 | 2009-07-29 15:41:29 +0200 | [diff] [blame] | 1139 | rsl_chan_activate_lchan(lchan, 0x00, rqd_ta); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1140 | |
| 1141 | /* create IMMEDIATE ASSIGN 04.08 messge */ |
| 1142 | memset(&ia, 0, sizeof(ia)); |
| 1143 | ia.l2_plen = 0x2d; |
| 1144 | ia.proto_discr = GSM48_PDISC_RR; |
| 1145 | ia.msg_type = GSM48_MT_RR_IMM_ASS; |
| 1146 | ia.page_mode = GSM48_PM_SAME; |
| 1147 | ia.chan_desc.chan_nr = lchan2chan_nr(lchan); |
| 1148 | ia.chan_desc.h0.h = 0; |
| 1149 | ia.chan_desc.h0.arfcn_high = arfcn >> 8; |
| 1150 | ia.chan_desc.h0.arfcn_low = arfcn & 0xff; |
Harald Welte | 63d23c8 | 2009-07-21 20:55:56 +0200 | [diff] [blame] | 1151 | ia.chan_desc.h0.tsc = bts->tsc; |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1152 | /* use request reference extracted from CHAN_RQD */ |
| 1153 | memcpy(&ia.req_ref, rqd_ref, sizeof(ia.req_ref)); |
| 1154 | ia.timing_advance = rqd_ta; |
| 1155 | ia.mob_alloc_len = 0; |
| 1156 | |
| 1157 | DEBUGP(DRSL, "Activating ARFCN(%u) TS(%u) SS(%u) lctype %s " |
| 1158 | "chan_nr=0x%02x r=%s ra=0x%02x\n", |
| 1159 | arfcn, ts_number, subch, gsm_lchan_name(lchan->type), |
| 1160 | ia.chan_desc.chan_nr, gsm_chreq_name(chreq_reason), |
| 1161 | rqd_ref->ra); |
| 1162 | |
Harald Welte | 427dbc4 | 2009-08-10 00:26:10 +0200 | [diff] [blame] | 1163 | /* Start timer T3101 to wait for GSM48_MT_RR_PAG_RESP */ |
| 1164 | lchan->T3101.cb = t3101_expired; |
| 1165 | lchan->T3101.data = lchan; |
| 1166 | bsc_schedule_timer(&lchan->T3101, 10, 0); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1167 | |
| 1168 | /* send IMMEDIATE ASSIGN CMD on RSL to BTS (to send on CCCH to MS) */ |
| 1169 | ret = rsl_imm_assign_cmd(bts, sizeof(ia), (u_int8_t *) &ia); |
| 1170 | |
| 1171 | return ret; |
| 1172 | } |
| 1173 | |
| 1174 | /* MS has requested a channel on the RACH */ |
| 1175 | static int rsl_rx_ccch_load(struct msgb *msg) |
| 1176 | { |
| 1177 | struct abis_rsl_dchan_hdr *rslh = msgb_l2(msg); |
| 1178 | u_int16_t pg_buf_space; |
| 1179 | u_int16_t rach_slot_count = -1; |
| 1180 | u_int16_t rach_busy_count = -1; |
| 1181 | u_int16_t rach_access_count = -1; |
| 1182 | |
| 1183 | switch (rslh->data[0]) { |
| 1184 | case RSL_IE_PAGING_LOAD: |
| 1185 | pg_buf_space = rslh->data[1] << 8 | rslh->data[2]; |
| 1186 | paging_update_buffer_space(msg->trx->bts, pg_buf_space); |
| 1187 | break; |
| 1188 | case RSL_IE_RACH_LOAD: |
| 1189 | if (msg->data_len >= 7) { |
| 1190 | rach_slot_count = rslh->data[2] << 8 | rslh->data[3]; |
| 1191 | rach_busy_count = rslh->data[4] << 8 | rslh->data[5]; |
| 1192 | rach_access_count = rslh->data[6] << 8 | rslh->data[7]; |
| 1193 | } |
| 1194 | break; |
| 1195 | default: |
| 1196 | break; |
| 1197 | } |
| 1198 | |
| 1199 | return 0; |
| 1200 | } |
| 1201 | |
| 1202 | static int abis_rsl_rx_cchan(struct msgb *msg) |
| 1203 | { |
| 1204 | struct abis_rsl_dchan_hdr *rslh = msgb_l2(msg); |
| 1205 | int rc = 0; |
| 1206 | |
| 1207 | msg->lchan = lchan_lookup(msg->trx, rslh->chan_nr); |
| 1208 | |
| 1209 | switch (rslh->c.msg_type) { |
| 1210 | case RSL_MT_CHAN_RQD: |
| 1211 | /* MS has requested a channel on the RACH */ |
| 1212 | rc = rsl_rx_chan_rqd(msg); |
| 1213 | break; |
| 1214 | case RSL_MT_CCCH_LOAD_IND: |
| 1215 | /* current load on the CCCH */ |
| 1216 | rc = rsl_rx_ccch_load(msg); |
| 1217 | break; |
| 1218 | case RSL_MT_DELETE_IND: |
| 1219 | /* CCCH overloaded, IMM_ASSIGN was dropped */ |
| 1220 | case RSL_MT_CBCH_LOAD_IND: |
| 1221 | /* current load on the CBCH */ |
| 1222 | fprintf(stderr, "Unimplemented Abis RSL TRX message type " |
| 1223 | "0x%02x\n", rslh->c.msg_type); |
| 1224 | break; |
| 1225 | default: |
| 1226 | fprintf(stderr, "Unknown Abis RSL TRX message type 0x%02x\n", |
| 1227 | rslh->c.msg_type); |
| 1228 | return -EINVAL; |
| 1229 | } |
| 1230 | |
| 1231 | return rc; |
| 1232 | } |
| 1233 | |
| 1234 | static int rsl_rx_rll_err_ind(struct msgb *msg) |
| 1235 | { |
| 1236 | struct abis_rsl_rll_hdr *rllh = msgb_l2(msg); |
| 1237 | u_int8_t *rlm_cause = rllh->data; |
| 1238 | |
Harald Welte | b660144 | 2009-08-04 02:50:21 +0200 | [diff] [blame] | 1239 | DEBUGPC(DRLL, "ERROR INDICATION cause=0x%02x\n", rlm_cause[1]); |
Harald Welte | ed9a5ab | 2009-08-09 13:47:35 +0200 | [diff] [blame] | 1240 | |
| 1241 | rll_indication(msg->lchan, rllh->link_id, BSC_RLLR_IND_ERR_IND); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1242 | |
Harald Welte | 692f585 | 2009-07-04 09:40:05 +0200 | [diff] [blame] | 1243 | if (rlm_cause[1] == RLL_CAUSE_T200_EXPIRED) |
Harald Welte | 85a163c | 2009-08-10 11:43:22 +0200 | [diff] [blame] | 1244 | return rsl_rf_chan_release(msg->lchan); |
Harald Welte | 692f585 | 2009-07-04 09:40:05 +0200 | [diff] [blame] | 1245 | |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1246 | return 0; |
| 1247 | } |
| 1248 | |
| 1249 | /* ESTABLISH INDICATION, LOCATION AREA UPDATE REQUEST |
| 1250 | 0x02, 0x06, |
| 1251 | 0x01, 0x20, |
| 1252 | 0x02, 0x00, |
| 1253 | 0x0b, 0x00, 0x0f, 0x05, 0x08, ... */ |
| 1254 | |
| 1255 | static int abis_rsl_rx_rll(struct msgb *msg) |
| 1256 | { |
| 1257 | struct abis_rsl_rll_hdr *rllh = msgb_l2(msg); |
| 1258 | int rc = 0; |
| 1259 | char *ts_name; |
Harald Welte (local) | 64994ce | 2009-08-14 11:41:12 +0200 | [diff] [blame] | 1260 | u_int8_t sapi = rllh->link_id & 7; |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1261 | |
| 1262 | msg->lchan = lchan_lookup(msg->trx, rllh->chan_nr); |
| 1263 | ts_name = gsm_ts_name(msg->lchan->ts); |
Harald Welte (local) | 64994ce | 2009-08-14 11:41:12 +0200 | [diff] [blame] | 1264 | DEBUGP(DRLL, "channel=%s chan_nr=0x%02x sapi=%u ", ts_name, |
| 1265 | rllh->chan_nr, sapi); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1266 | |
| 1267 | switch (rllh->c.msg_type) { |
| 1268 | case RSL_MT_DATA_IND: |
| 1269 | DEBUGPC(DRLL, "DATA INDICATION\n"); |
| 1270 | if (msgb_l2len(msg) > |
| 1271 | sizeof(struct abis_rsl_common_hdr) + sizeof(*rllh) && |
| 1272 | rllh->data[0] == RSL_IE_L3_INFO) { |
| 1273 | msg->l3h = &rllh->data[3]; |
Harald Welte (local) | 64994ce | 2009-08-14 11:41:12 +0200 | [diff] [blame] | 1274 | return gsm0408_rcvmsg(msg, rllh->link_id); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1275 | } |
| 1276 | break; |
| 1277 | case RSL_MT_EST_IND: |
| 1278 | DEBUGPC(DRLL, "ESTABLISH INDICATION\n"); |
Harald Welte | 427dbc4 | 2009-08-10 00:26:10 +0200 | [diff] [blame] | 1279 | /* lchan is established, stop T3101 */ |
| 1280 | bsc_del_timer(&msg->lchan->T3101); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1281 | if (msgb_l2len(msg) > |
| 1282 | sizeof(struct abis_rsl_common_hdr) + sizeof(*rllh) && |
| 1283 | rllh->data[0] == RSL_IE_L3_INFO) { |
| 1284 | msg->l3h = &rllh->data[3]; |
Harald Welte (local) | 64994ce | 2009-08-14 11:41:12 +0200 | [diff] [blame] | 1285 | return gsm0408_rcvmsg(msg, rllh->link_id); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1286 | } |
| 1287 | break; |
Harald Welte | ed9a5ab | 2009-08-09 13:47:35 +0200 | [diff] [blame] | 1288 | case RSL_MT_EST_CONF: |
Harald Welte | 6140217 | 2009-08-09 14:13:58 +0200 | [diff] [blame] | 1289 | DEBUGPC(DRLL, "ESTABLISH CONFIRM\n"); |
Harald Welte | ed9a5ab | 2009-08-09 13:47:35 +0200 | [diff] [blame] | 1290 | rll_indication(msg->lchan, rllh->link_id, |
| 1291 | BSC_RLLR_IND_EST_CONF); |
| 1292 | break; |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1293 | case RSL_MT_REL_IND: |
Harald Welte | 0f2e3c1 | 2009-08-08 13:15:07 +0200 | [diff] [blame] | 1294 | /* BTS informs us of having received DISC from MS */ |
Harald Welte | b660144 | 2009-08-04 02:50:21 +0200 | [diff] [blame] | 1295 | DEBUGPC(DRLL, "RELEASE INDICATION\n"); |
Harald Welte | ed9a5ab | 2009-08-09 13:47:35 +0200 | [diff] [blame] | 1296 | rll_indication(msg->lchan, rllh->link_id, |
| 1297 | BSC_RLLR_IND_REL_IND); |
Harald Welte | 0f2e3c1 | 2009-08-08 13:15:07 +0200 | [diff] [blame] | 1298 | /* we can now releae the channel on the BTS/Abis side */ |
Harald Welte | 85a163c | 2009-08-10 11:43:22 +0200 | [diff] [blame] | 1299 | /* FIXME: officially we need to start T3111 and wait for |
| 1300 | * some grace period */ |
| 1301 | rsl_rf_chan_release(msg->lchan); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1302 | break; |
| 1303 | case RSL_MT_REL_CONF: |
Harald Welte | 0f2e3c1 | 2009-08-08 13:15:07 +0200 | [diff] [blame] | 1304 | /* BTS informs us of having received UA from MS, |
| 1305 | * in response to DISC that we've sent earlier */ |
Harald Welte | b660144 | 2009-08-04 02:50:21 +0200 | [diff] [blame] | 1306 | DEBUGPC(DRLL, "RELEASE CONFIRMATION\n"); |
Harald Welte | 0f2e3c1 | 2009-08-08 13:15:07 +0200 | [diff] [blame] | 1307 | /* we can now releae the channel on the BTS/Abis side */ |
Harald Welte | 85a163c | 2009-08-10 11:43:22 +0200 | [diff] [blame] | 1308 | /* FIXME: officially we need to start T3111 and wait for |
| 1309 | * some grace period */ |
| 1310 | rsl_rf_chan_release(msg->lchan); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1311 | break; |
| 1312 | case RSL_MT_ERROR_IND: |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1313 | rc = rsl_rx_rll_err_ind(msg); |
| 1314 | break; |
| 1315 | case RSL_MT_UNIT_DATA_IND: |
Harald Welte | b660144 | 2009-08-04 02:50:21 +0200 | [diff] [blame] | 1316 | DEBUGPC(DRLL, "unimplemented Abis RLL message type 0x%02x\n", |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1317 | rllh->c.msg_type); |
| 1318 | break; |
| 1319 | default: |
Harald Welte | b660144 | 2009-08-04 02:50:21 +0200 | [diff] [blame] | 1320 | DEBUGPC(DRLL, "unknown Abis RLL message type 0x%02x\n", |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1321 | rllh->c.msg_type); |
| 1322 | } |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1323 | return rc; |
| 1324 | } |
| 1325 | |
Harald Welte | 98d79f9 | 2009-07-28 18:11:56 +0200 | [diff] [blame] | 1326 | static u_int8_t ipa_smod_s_for_tch_mode(u_int8_t tch_mode) |
| 1327 | { |
Harald Welte | 98d79f9 | 2009-07-28 18:11:56 +0200 | [diff] [blame] | 1328 | switch (tch_mode) { |
| 1329 | case GSM48_CMODE_SPEECH_V1: |
| 1330 | return 0x00; |
| 1331 | case GSM48_CMODE_SPEECH_EFR: |
| 1332 | return 0x01; |
| 1333 | case GSM48_CMODE_SPEECH_AMR: |
| 1334 | return 0x02; |
| 1335 | /* FIXME: Type1 half-rate and type3 half-rate */ |
| 1336 | } |
Harald Welte | fb4a9e9 | 2009-07-29 12:12:18 +0200 | [diff] [blame] | 1337 | DEBUGPC(DRSL, "Cannot determine ip.access speech mode for " |
| 1338 | "tch_mode == 0x%02x\n", tch_mode); |
Harald Welte | 98d79f9 | 2009-07-28 18:11:56 +0200 | [diff] [blame] | 1339 | return 0; |
Harald Welte | 98d79f9 | 2009-07-28 18:11:56 +0200 | [diff] [blame] | 1340 | } |
| 1341 | |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1342 | /* ip.access specific RSL extensions */ |
| 1343 | int rsl_ipacc_bind(struct gsm_lchan *lchan) |
| 1344 | { |
| 1345 | struct msgb *msg = rsl_msgb_alloc(); |
| 1346 | struct abis_rsl_dchan_hdr *dh; |
Harald Welte | fb4a9e9 | 2009-07-29 12:12:18 +0200 | [diff] [blame] | 1347 | u_int8_t speech_mode; |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1348 | |
| 1349 | dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh)); |
| 1350 | init_dchan_hdr(dh, RSL_MT_IPAC_BIND); |
| 1351 | dh->c.msg_discr = ABIS_RSL_MDISC_IPACCESS; |
| 1352 | dh->chan_nr = lchan2chan_nr(lchan); |
| 1353 | |
Harald Welte | 98d79f9 | 2009-07-28 18:11:56 +0200 | [diff] [blame] | 1354 | /* 0x1- == receive-only, 0x-1 == EFR codec */ |
Harald Welte | fb4a9e9 | 2009-07-29 12:12:18 +0200 | [diff] [blame] | 1355 | speech_mode = 0x10 | ipa_smod_s_for_tch_mode(lchan->tch_mode); |
| 1356 | msgb_tv_put(msg, RSL_IE_IPAC_SPEECH_MODE, speech_mode); |
Harald Welte | 98d79f9 | 2009-07-28 18:11:56 +0200 | [diff] [blame] | 1357 | |
Harald Welte | fb4a9e9 | 2009-07-29 12:12:18 +0200 | [diff] [blame] | 1358 | DEBUGP(DRSL, "channel=%s chan_nr=0x%02x IPAC_BIND " |
| 1359 | "speech_mode=0x%02x\n", gsm_ts_name(lchan->ts), |
| 1360 | dh->chan_nr, speech_mode); |
Harald Welte | 98d79f9 | 2009-07-28 18:11:56 +0200 | [diff] [blame] | 1361 | |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1362 | msg->trx = lchan->ts->trx; |
| 1363 | |
| 1364 | return abis_rsl_sendmsg(msg); |
| 1365 | } |
| 1366 | |
Harald Welte | 8cdeaad | 2009-07-12 09:50:35 +0200 | [diff] [blame] | 1367 | int rsl_ipacc_connect(struct gsm_lchan *lchan, u_int32_t ip, u_int16_t port, |
| 1368 | u_int16_t conn_id, u_int8_t rtp_payload2) |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1369 | { |
| 1370 | struct msgb *msg = rsl_msgb_alloc(); |
| 1371 | struct abis_rsl_dchan_hdr *dh; |
| 1372 | u_int8_t *att_f8, *att_ip, *att_port; |
Harald Welte | fb4a9e9 | 2009-07-29 12:12:18 +0200 | [diff] [blame] | 1373 | u_int8_t speech_mode; |
Harald Welte | 98d79f9 | 2009-07-28 18:11:56 +0200 | [diff] [blame] | 1374 | struct in_addr ia; |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1375 | |
| 1376 | dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh)); |
| 1377 | init_dchan_hdr(dh, RSL_MT_IPAC_CONNECT); |
| 1378 | dh->c.msg_discr = ABIS_RSL_MDISC_IPACCESS; |
| 1379 | dh->chan_nr = lchan2chan_nr(lchan); |
| 1380 | |
Harald Welte | fb4a9e9 | 2009-07-29 12:12:18 +0200 | [diff] [blame] | 1381 | /* 0x0- == both directions, 0x-1 == EFR codec */ |
| 1382 | speech_mode = 0x00 | ipa_smod_s_for_tch_mode(lchan->tch_mode); |
| 1383 | |
Harald Welte | 98d79f9 | 2009-07-28 18:11:56 +0200 | [diff] [blame] | 1384 | ia.s_addr = htonl(ip); |
Harald Welte | fb4a9e9 | 2009-07-29 12:12:18 +0200 | [diff] [blame] | 1385 | DEBUGP(DRSL, "channel=%s chan_nr=0x%02x IPAC_CONNECT " |
| 1386 | "IP=%s PORT=%d RTP_PAYLOAD2=%d CONN_ID=%d speech_mode=0x%02x\n", |
Harald Welte | 98d79f9 | 2009-07-28 18:11:56 +0200 | [diff] [blame] | 1387 | gsm_ts_name(lchan->ts), dh->chan_nr, |
Harald Welte | fb4a9e9 | 2009-07-29 12:12:18 +0200 | [diff] [blame] | 1388 | inet_ntoa(ia), port, rtp_payload2, conn_id, speech_mode); |
Harald Welte | 98d79f9 | 2009-07-28 18:11:56 +0200 | [diff] [blame] | 1389 | |
Harald Welte | 8cdeaad | 2009-07-12 09:50:35 +0200 | [diff] [blame] | 1390 | att_f8 = msgb_put(msg, sizeof(conn_id)+1); |
Harald Welte | b949895 | 2009-07-12 09:45:05 +0200 | [diff] [blame] | 1391 | att_f8[0] = RSL_IE_IPAC_CONN_ID; |
Harald Welte | 8cdeaad | 2009-07-12 09:50:35 +0200 | [diff] [blame] | 1392 | att_f8[1] = conn_id >> 8; |
| 1393 | att_f8[2] = conn_id & 0xff; |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1394 | |
| 1395 | att_ip = msgb_put(msg, sizeof(ip)+1); |
| 1396 | att_ip[0] = RSL_IE_IPAC_REMOTE_IP; |
| 1397 | att_ip[1] = ip >> 24; |
| 1398 | att_ip[2] = ip >> 16; |
| 1399 | att_ip[3] = ip >> 8; |
| 1400 | att_ip[4] = ip & 0xff; |
| 1401 | //att_ip[4] = 11; |
| 1402 | |
| 1403 | att_port = msgb_put(msg, sizeof(port)+1); |
| 1404 | att_port[0] = RSL_IE_IPAC_REMOTE_PORT; |
| 1405 | att_port[1] = port >> 8; |
| 1406 | att_port[2] = port & 0xff; |
| 1407 | |
Harald Welte | fb4a9e9 | 2009-07-29 12:12:18 +0200 | [diff] [blame] | 1408 | msgb_tv_put(msg, RSL_IE_IPAC_SPEECH_MODE, speech_mode); |
Harald Welte | 98d79f9 | 2009-07-28 18:11:56 +0200 | [diff] [blame] | 1409 | if (rtp_payload2) |
| 1410 | msgb_tv_put(msg, RSL_IE_IPAC_RTP_PAYLOAD2, rtp_payload2); |
| 1411 | |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1412 | msg->trx = lchan->ts->trx; |
| 1413 | |
| 1414 | return abis_rsl_sendmsg(msg); |
| 1415 | } |
| 1416 | |
| 1417 | static int abis_rsl_rx_ipacc_bindack(struct msgb *msg) |
| 1418 | { |
| 1419 | struct abis_rsl_dchan_hdr *dh = msgb_l2(msg); |
| 1420 | struct tlv_parsed tv; |
| 1421 | struct gsm_bts_trx_ts *ts = msg->lchan->ts; |
| 1422 | struct in_addr ip; |
| 1423 | u_int16_t port, attr_f8; |
| 1424 | |
| 1425 | /* the BTS has acknowledged a local bind, it now tells us the IP |
| 1426 | * address and port number to which it has bound the given logical |
| 1427 | * channel */ |
| 1428 | |
| 1429 | rsl_tlv_parse(&tv, dh->data, msgb_l2len(msg)-sizeof(*dh)); |
| 1430 | if (!TLVP_PRESENT(&tv, RSL_IE_IPAC_LOCAL_PORT) || |
| 1431 | !TLVP_PRESENT(&tv, RSL_IE_IPAC_LOCAL_IP) || |
Harald Welte | b949895 | 2009-07-12 09:45:05 +0200 | [diff] [blame] | 1432 | !TLVP_PRESENT(&tv, RSL_IE_IPAC_CONN_ID)) { |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1433 | DEBUGPC(DRSL, "mandatory IE missing"); |
| 1434 | return -EINVAL; |
| 1435 | } |
| 1436 | ip.s_addr = *((u_int32_t *) TLVP_VAL(&tv, RSL_IE_IPAC_LOCAL_IP)); |
| 1437 | port = *((u_int16_t *) TLVP_VAL(&tv, RSL_IE_IPAC_LOCAL_PORT)); |
| 1438 | attr_f8 = *((u_int16_t *) TLVP_VAL(&tv, 0xf8)); |
| 1439 | |
Harald Welte | 98d79f9 | 2009-07-28 18:11:56 +0200 | [diff] [blame] | 1440 | DEBUGPC(DRSL, "IP=%s PORT=%d CONN_ID=%d ", |
| 1441 | inet_ntoa(ip), ntohs(port), ntohs(attr_f8)); |
| 1442 | |
| 1443 | if (TLVP_PRESENT(&tv, RSL_IE_IPAC_RTP_PAYLOAD2)) { |
| 1444 | ts->abis_ip.rtp_payload2 = |
| 1445 | *TLVP_VAL(&tv, RSL_IE_IPAC_RTP_PAYLOAD2); |
| 1446 | DEBUGPC(DRSL, "RTP_PAYLOAD2=0x%02x ", |
| 1447 | ts->abis_ip.rtp_payload2); |
| 1448 | } |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1449 | |
| 1450 | /* update our local information about this TS */ |
| 1451 | ts->abis_ip.bound_ip = ntohl(ip.s_addr); |
| 1452 | ts->abis_ip.bound_port = ntohs(port); |
Harald Welte | 8cdeaad | 2009-07-12 09:50:35 +0200 | [diff] [blame] | 1453 | ts->abis_ip.conn_id = ntohs(attr_f8); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1454 | |
| 1455 | dispatch_signal(SS_ABISIP, S_ABISIP_BIND_ACK, msg->lchan); |
| 1456 | |
| 1457 | return 0; |
| 1458 | } |
| 1459 | |
| 1460 | static int abis_rsl_rx_ipacc_disc_ind(struct msgb *msg) |
| 1461 | { |
| 1462 | struct abis_rsl_dchan_hdr *dh = msgb_l2(msg); |
| 1463 | struct tlv_parsed tv; |
| 1464 | |
| 1465 | rsl_tlv_parse(&tv, dh->data, msgb_l2len(msg)-sizeof(*dh)); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1466 | |
Harald Welte | f1a168d | 2009-07-28 17:58:09 +0200 | [diff] [blame] | 1467 | if (TLVP_PRESENT(&tv, RSL_IE_CAUSE)) |
| 1468 | print_rsl_cause(TLVP_VAL(&tv, RSL_IE_CAUSE), |
| 1469 | TLVP_LEN(&tv, RSL_IE_CAUSE)); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1470 | |
Harald Welte | ba4e58d | 2009-07-28 18:02:05 +0200 | [diff] [blame] | 1471 | dispatch_signal(SS_ABISIP, S_ABISIP_DISC_IND, msg->lchan); |
| 1472 | |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1473 | return 0; |
| 1474 | } |
| 1475 | |
| 1476 | static int abis_rsl_rx_ipacc(struct msgb *msg) |
| 1477 | { |
| 1478 | struct abis_rsl_rll_hdr *rllh = msgb_l2(msg); |
| 1479 | int rc = 0; |
| 1480 | |
| 1481 | msg->lchan = lchan_lookup(msg->trx, rllh->chan_nr); |
| 1482 | DEBUGP(DRSL, "channel=%s chan_nr=0x%02x ", |
| 1483 | gsm_ts_name(msg->lchan->ts), rllh->chan_nr); |
| 1484 | |
| 1485 | switch (rllh->c.msg_type) { |
| 1486 | case RSL_MT_IPAC_BIND_ACK: |
| 1487 | DEBUGPC(DRSL, "IPAC_BIND_ACK "); |
| 1488 | rc = abis_rsl_rx_ipacc_bindack(msg); |
| 1489 | break; |
| 1490 | case RSL_MT_IPAC_BIND_NACK: |
| 1491 | /* somehow the BTS was unable to bind the lchan to its local |
| 1492 | * port?!? */ |
| 1493 | DEBUGPC(DRSL, "IPAC_BIND_NACK "); |
| 1494 | break; |
| 1495 | case RSL_MT_IPAC_CONNECT_ACK: |
| 1496 | /* the BTS tells us that a connect operation was successful */ |
| 1497 | DEBUGPC(DRSL, "IPAC_CONNECT_ACK "); |
| 1498 | break; |
| 1499 | case RSL_MT_IPAC_CONNECT_NACK: |
| 1500 | /* somehow the BTS was unable to connect the lchan to a remote |
| 1501 | * port */ |
| 1502 | DEBUGPC(DRSL, "IPAC_CONNECT_NACK "); |
| 1503 | break; |
| 1504 | case RSL_MT_IPAC_DISCONNECT_IND: |
| 1505 | DEBUGPC(DRSL, "IPAC_DISCONNECT_IND "); |
| 1506 | rc = abis_rsl_rx_ipacc_disc_ind(msg); |
| 1507 | break; |
| 1508 | default: |
| 1509 | DEBUGPC(DRSL, "Unknown ip.access msg_type 0x%02x", rllh->c.msg_type); |
| 1510 | break; |
| 1511 | } |
| 1512 | DEBUGPC(DRSL, "\n"); |
| 1513 | |
| 1514 | return rc; |
| 1515 | } |
| 1516 | |
| 1517 | |
| 1518 | /* Entry-point where L2 RSL from BTS enters */ |
| 1519 | int abis_rsl_rcvmsg(struct msgb *msg) |
| 1520 | { |
| 1521 | struct abis_rsl_common_hdr *rslh = msgb_l2(msg) ; |
| 1522 | int rc = 0; |
| 1523 | |
| 1524 | switch (rslh->msg_discr & 0xfe) { |
| 1525 | case ABIS_RSL_MDISC_RLL: |
| 1526 | rc = abis_rsl_rx_rll(msg); |
| 1527 | break; |
| 1528 | case ABIS_RSL_MDISC_DED_CHAN: |
| 1529 | rc = abis_rsl_rx_dchan(msg); |
| 1530 | break; |
| 1531 | case ABIS_RSL_MDISC_COM_CHAN: |
| 1532 | rc = abis_rsl_rx_cchan(msg); |
| 1533 | break; |
| 1534 | case ABIS_RSL_MDISC_TRX: |
| 1535 | rc = abis_rsl_rx_trx(msg); |
| 1536 | break; |
| 1537 | case ABIS_RSL_MDISC_LOC: |
| 1538 | fprintf(stderr, "unimplemented RSL msg disc 0x%02x\n", |
| 1539 | rslh->msg_discr); |
| 1540 | break; |
| 1541 | case ABIS_RSL_MDISC_IPACCESS: |
| 1542 | rc = abis_rsl_rx_ipacc(msg); |
| 1543 | break; |
| 1544 | default: |
| 1545 | fprintf(stderr, "unknown RSL message discriminator 0x%02x\n", |
| 1546 | rslh->msg_discr); |
| 1547 | return -EINVAL; |
| 1548 | } |
| 1549 | msgb_free(msg); |
| 1550 | return rc; |
| 1551 | } |
| 1552 | |
| 1553 | |
Holger Hans Peter Freyther | 4e0fdfd | 2009-07-09 20:43:16 +0200 | [diff] [blame] | 1554 | /* Section 3.3.2.3 TS 05.02. I think this looks like a table */ |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1555 | int rsl_ccch_conf_to_bs_cc_chans(int ccch_conf) |
| 1556 | { |
| 1557 | switch (ccch_conf) { |
| 1558 | case RSL_BCCH_CCCH_CONF_1_NC: |
| 1559 | return 1; |
| 1560 | case RSL_BCCH_CCCH_CONF_1_C: |
| 1561 | return 1; |
| 1562 | case RSL_BCCH_CCCH_CONF_2_NC: |
| 1563 | return 2; |
| 1564 | case RSL_BCCH_CCCH_CONF_3_NC: |
| 1565 | return 3; |
| 1566 | case RSL_BCCH_CCCH_CONF_4_NC: |
| 1567 | return 4; |
| 1568 | default: |
| 1569 | return -1; |
| 1570 | } |
| 1571 | } |
| 1572 | |
Holger Hans Peter Freyther | 4e0fdfd | 2009-07-09 20:43:16 +0200 | [diff] [blame] | 1573 | /* Section 3.3.2.3 TS 05.02 */ |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1574 | int rsl_ccch_conf_to_bs_ccch_sdcch_comb(int ccch_conf) |
| 1575 | { |
| 1576 | switch (ccch_conf) { |
| 1577 | case RSL_BCCH_CCCH_CONF_1_NC: |
| 1578 | return 0; |
| 1579 | case RSL_BCCH_CCCH_CONF_1_C: |
| 1580 | return 1; |
| 1581 | case RSL_BCCH_CCCH_CONF_2_NC: |
| 1582 | return 0; |
| 1583 | case RSL_BCCH_CCCH_CONF_3_NC: |
| 1584 | return 0; |
| 1585 | case RSL_BCCH_CCCH_CONF_4_NC: |
| 1586 | return 0; |
| 1587 | default: |
| 1588 | return -1; |
| 1589 | } |
| 1590 | } |
| 1591 | |
| 1592 | /* From Table 10.5.33 of GSM 04.08 */ |
| 1593 | int rsl_number_of_paging_subchannels(struct gsm_bts *bts) |
| 1594 | { |
| 1595 | if (bts->chan_desc.ccch_conf == RSL_BCCH_CCCH_CONF_1_C) { |
| 1596 | return MAX(1, (3 - bts->chan_desc.bs_ag_blks_res)) |
| 1597 | * (bts->chan_desc.bs_pa_mfrms + 2); |
| 1598 | } else { |
| 1599 | return (9 - bts->chan_desc.bs_ag_blks_res) |
| 1600 | * (bts->chan_desc.bs_pa_mfrms + 2); |
| 1601 | } |
| 1602 | } |