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> |
| 33 | #include <openbsc/abis_rsl.h> |
| 34 | #include <openbsc/chan_alloc.h> |
| 35 | #include <openbsc/debug.h> |
| 36 | #include <openbsc/tlv.h> |
| 37 | #include <openbsc/paging.h> |
| 38 | #include <openbsc/signal.h> |
| 39 | |
| 40 | #define RSL_ALLOC_SIZE 1024 |
| 41 | #define RSL_ALLOC_HEADROOM 128 |
| 42 | |
| 43 | #define MAX(a, b) (a) >= (b) ? (a) : (b) |
| 44 | |
| 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 }, |
Harald Welte | 1610d30 | 2009-07-12 09:56:39 +0200 | [diff] [blame] | 106 | [RSL_IE_IPAC_PROXY_UDP] = { TLV_TYPE_FIXED, 2 }, |
| 107 | [RSL_IE_IPAC_BSCMPL_TOUT] = { TLV_TYPE_TV }, |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 108 | [RSL_IE_IPAC_REMOTE_IP] = { TLV_TYPE_FIXED, 4 }, |
| 109 | [RSL_IE_IPAC_REMOTE_PORT] = { TLV_TYPE_FIXED, 2 }, |
Harald Welte | 1610d30 | 2009-07-12 09:56:39 +0200 | [diff] [blame] | 110 | [RSL_IE_IPAC_RTP_PAYLOAD] = { TLV_TYPE_TV }, |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 111 | [RSL_IE_IPAC_LOCAL_PORT] = { TLV_TYPE_FIXED, 2 }, |
Harald Welte | b949895 | 2009-07-12 09:45:05 +0200 | [diff] [blame] | 112 | [RSL_IE_IPAC_SPEECH_MODE] = { TLV_TYPE_TV }, |
Harald Welte | 1610d30 | 2009-07-12 09:56:39 +0200 | [diff] [blame] | 113 | [RSL_IE_IPAC_LOCAL_IP] = { TLV_TYPE_FIXED, 4 }, |
Harald Welte | b949895 | 2009-07-12 09:45:05 +0200 | [diff] [blame] | 114 | [RSL_IE_IPAC_CONN_ID] = { TLV_TYPE_FIXED, 2 }, |
Harald Welte | 1610d30 | 2009-07-12 09:56:39 +0200 | [diff] [blame] | 115 | [RSL_IE_IPAC_RTP_CSD_FMT] = { TLV_TYPE_TV }, |
| 116 | [RSL_IE_IPAC_RTP_JIT_BUF] = { TLV_TYPE_FIXED, 2 }, |
| 117 | [RSL_IE_IPAC_RTP_COMPR] = { TLV_TYPE_TV }, |
Harald Welte | b949895 | 2009-07-12 09:45:05 +0200 | [diff] [blame] | 118 | [RSL_IE_IPAC_RTP_PAYLOAD2] = { TLV_TYPE_TV }, |
Harald Welte | 1610d30 | 2009-07-12 09:56:39 +0200 | [diff] [blame] | 119 | [RSL_IE_IPAC_RTP_MPLEX] = { TLV_TYPE_FIXED, 8 }, |
| 120 | [RSL_IE_IPAC_RTP_MPLEX_ID] = { TLV_TYPE_TV }, |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 121 | }, |
| 122 | }; |
| 123 | #define rsl_tlv_parse(dec, buf, len) \ |
| 124 | tlv_parse(dec, &rsl_att_tlvdef, buf, len, 0, 0) |
| 125 | |
| 126 | static u_int8_t mdisc_by_msgtype(u_int8_t msg_type) |
| 127 | { |
| 128 | /* mask off the transparent bit ? */ |
| 129 | msg_type &= 0xfe; |
| 130 | |
| 131 | if ((msg_type & 0xf0) == 0x00) |
| 132 | return ABIS_RSL_MDISC_RLL; |
| 133 | if ((msg_type & 0xf0) == 0x10) { |
| 134 | if (msg_type >= 0x19 && msg_type <= 0x22) |
| 135 | return ABIS_RSL_MDISC_TRX; |
| 136 | else |
| 137 | return ABIS_RSL_MDISC_COM_CHAN; |
| 138 | } |
| 139 | if ((msg_type & 0xe0) == 0x20) |
| 140 | return ABIS_RSL_MDISC_DED_CHAN; |
| 141 | |
| 142 | return ABIS_RSL_MDISC_LOC; |
| 143 | } |
| 144 | |
| 145 | static inline void init_dchan_hdr(struct abis_rsl_dchan_hdr *dh, |
| 146 | u_int8_t msg_type) |
| 147 | { |
| 148 | dh->c.msg_discr = mdisc_by_msgtype(msg_type); |
| 149 | dh->c.msg_type = msg_type; |
| 150 | dh->ie_chan = RSL_IE_CHAN_NR; |
| 151 | } |
| 152 | |
| 153 | static inline void init_llm_hdr(struct abis_rsl_rll_hdr *dh, |
| 154 | u_int8_t msg_type) |
| 155 | { |
| 156 | /* dh->c.msg_discr = mdisc_by_msgtype(msg_type); */ |
| 157 | dh->c.msg_discr = ABIS_RSL_MDISC_RLL; |
| 158 | dh->c.msg_type = msg_type; |
| 159 | dh->ie_chan = RSL_IE_CHAN_NR; |
| 160 | dh->ie_link_id = RSL_IE_LINK_IDENT; |
| 161 | } |
| 162 | |
| 163 | |
| 164 | /* encode channel number as per Section 9.3.1 */ |
| 165 | u_int8_t rsl_enc_chan_nr(u_int8_t type, u_int8_t subch, u_int8_t timeslot) |
| 166 | { |
| 167 | u_int8_t ret; |
| 168 | |
| 169 | ret = (timeslot & 0x07) | type; |
| 170 | |
| 171 | switch (type) { |
| 172 | case RSL_CHAN_Lm_ACCHs: |
| 173 | subch &= 0x01; |
| 174 | break; |
| 175 | case RSL_CHAN_SDCCH4_ACCH: |
| 176 | subch &= 0x07; |
| 177 | break; |
| 178 | case RSL_CHAN_SDCCH8_ACCH: |
| 179 | subch &= 0x07; |
| 180 | break; |
| 181 | default: |
| 182 | /* no subchannels allowed */ |
| 183 | subch = 0x00; |
| 184 | break; |
| 185 | } |
| 186 | ret |= (subch << 3); |
| 187 | |
| 188 | return ret; |
| 189 | } |
| 190 | |
| 191 | /* determine logical channel based on TRX and channel number IE */ |
| 192 | struct gsm_lchan *lchan_lookup(struct gsm_bts_trx *trx, u_int8_t chan_nr) |
| 193 | { |
| 194 | struct gsm_lchan *lchan; |
| 195 | u_int8_t ts_nr = chan_nr & 0x07; |
| 196 | u_int8_t cbits = chan_nr >> 3; |
| 197 | u_int8_t lch_idx; |
| 198 | struct gsm_bts_trx_ts *ts = &trx->ts[ts_nr]; |
| 199 | |
| 200 | if (cbits == 0x01) { |
| 201 | lch_idx = 0; /* TCH/F */ |
| 202 | if (ts->pchan != GSM_PCHAN_TCH_F) |
| 203 | fprintf(stderr, "chan_nr=0x%02x but pchan=%u\n", |
| 204 | chan_nr, ts->pchan); |
| 205 | } else if ((cbits & 0x1e) == 0x02) { |
| 206 | lch_idx = cbits & 0x1; /* TCH/H */ |
| 207 | if (ts->pchan != GSM_PCHAN_TCH_H) |
| 208 | fprintf(stderr, "chan_nr=0x%02x but pchan=%u\n", |
| 209 | chan_nr, ts->pchan); |
| 210 | } else if ((cbits & 0x1c) == 0x04) { |
| 211 | lch_idx = cbits & 0x3; /* SDCCH/4 */ |
| 212 | if (ts->pchan != GSM_PCHAN_CCCH_SDCCH4) |
| 213 | fprintf(stderr, "chan_nr=0x%02x but pchan=%u\n", |
| 214 | chan_nr, ts->pchan); |
| 215 | } else if ((cbits & 0x18) == 0x08) { |
| 216 | lch_idx = cbits & 0x7; /* SDCCH/8 */ |
| 217 | if (ts->pchan != GSM_PCHAN_SDCCH8_SACCH8C) |
| 218 | fprintf(stderr, "chan_nr=0x%02x but pchan=%u\n", |
| 219 | chan_nr, ts->pchan); |
| 220 | } else if (cbits == 0x10 || cbits == 0x11 || cbits == 0x12) { |
| 221 | lch_idx = 0; |
| 222 | if (ts->pchan != GSM_PCHAN_CCCH && |
| 223 | ts->pchan != GSM_PCHAN_CCCH_SDCCH4) |
| 224 | fprintf(stderr, "chan_nr=0x%02x but pchan=%u\n", |
| 225 | chan_nr, ts->pchan); |
| 226 | /* FIXME: we should not return first sdcch4 !!! */ |
| 227 | } else { |
| 228 | fprintf(stderr, "unknown chan_nr=0x%02x\n", chan_nr); |
| 229 | return NULL; |
| 230 | } |
| 231 | |
| 232 | lchan = &ts->lchan[lch_idx]; |
| 233 | |
| 234 | return lchan; |
| 235 | } |
| 236 | |
| 237 | u_int8_t lchan2chan_nr(struct gsm_lchan *lchan) |
| 238 | { |
| 239 | struct gsm_bts_trx_ts *ts = lchan->ts; |
| 240 | u_int8_t cbits, chan_nr; |
| 241 | |
| 242 | switch (ts->pchan) { |
| 243 | case GSM_PCHAN_TCH_F: |
| 244 | cbits = 0x01; |
| 245 | break; |
| 246 | case GSM_PCHAN_TCH_H: |
| 247 | cbits = 0x02; |
| 248 | cbits += lchan->nr; |
| 249 | break; |
| 250 | case GSM_PCHAN_CCCH_SDCCH4: |
| 251 | cbits = 0x04; |
| 252 | cbits += lchan->nr; |
| 253 | break; |
| 254 | case GSM_PCHAN_SDCCH8_SACCH8C: |
| 255 | cbits = 0x08; |
| 256 | cbits += lchan->nr; |
| 257 | break; |
| 258 | default: |
| 259 | case GSM_PCHAN_CCCH: |
| 260 | cbits = 0x10; |
| 261 | break; |
| 262 | } |
| 263 | |
| 264 | chan_nr = (cbits << 3) | (ts->nr & 0x7); |
| 265 | |
| 266 | return chan_nr; |
| 267 | } |
| 268 | |
| 269 | /* As per TS 03.03 Section 2.2, the IMSI has 'not more than 15 digits' */ |
| 270 | u_int64_t str_to_imsi(const char *imsi_str) |
| 271 | { |
| 272 | u_int64_t ret; |
| 273 | |
| 274 | ret = strtoull(imsi_str, NULL, 10); |
| 275 | |
| 276 | return ret; |
| 277 | } |
| 278 | |
| 279 | /* Table 5 Clause 7 TS 05.02 */ |
| 280 | unsigned int n_pag_blocks(int bs_ccch_sdcch_comb, unsigned int bs_ag_blks_res) |
| 281 | { |
| 282 | if (!bs_ccch_sdcch_comb) |
| 283 | return 9 - bs_ag_blks_res; |
| 284 | else |
| 285 | return 3 - bs_ag_blks_res; |
| 286 | } |
| 287 | |
| 288 | /* Chapter 6.5.2 of TS 05.02 */ |
| 289 | unsigned int get_ccch_group(u_int64_t imsi, unsigned int bs_cc_chans, |
| 290 | unsigned int n_pag_blocks) |
| 291 | { |
| 292 | return (imsi % 1000) % (bs_cc_chans * n_pag_blocks) / n_pag_blocks; |
| 293 | } |
| 294 | |
| 295 | /* Chapter 6.5.2 of TS 05.02 */ |
| 296 | unsigned int get_paging_group(u_int64_t imsi, unsigned int bs_cc_chans, |
| 297 | int n_pag_blocks) |
| 298 | { |
| 299 | return (imsi % 1000) % (bs_cc_chans * n_pag_blocks) % n_pag_blocks; |
| 300 | } |
| 301 | |
| 302 | static struct msgb *rsl_msgb_alloc(void) |
| 303 | { |
Harald Welte | 9cfc935 | 2009-06-26 19:39:35 +0200 | [diff] [blame] | 304 | return msgb_alloc_headroom(RSL_ALLOC_SIZE, RSL_ALLOC_HEADROOM, |
| 305 | "RSL"); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 306 | } |
| 307 | |
| 308 | #define MACBLOCK_SIZE 23 |
| 309 | static void pad_macblock(u_int8_t *out, const u_int8_t *in, int len) |
| 310 | { |
| 311 | memcpy(out, in, len); |
| 312 | |
| 313 | if (len < MACBLOCK_SIZE) |
| 314 | memset(out+len, 0x2b, MACBLOCK_SIZE-len); |
| 315 | } |
| 316 | |
Harald Welte | 26cc168 | 2009-07-28 17:58:09 +0200 | [diff] [blame^] | 317 | static const char *rsl_err_vals[0xff] = { |
| 318 | [RSL_ERR_RADIO_IF_FAIL] = "Radio Interface Failure", |
| 319 | [RSL_ERR_RADIO_LINK_FAIL] = "Radio Link Failure", |
| 320 | [RSL_ERR_HANDOVER_ACC_FAIL] = "Handover Access Failure", |
| 321 | [RSL_ERR_TALKER_ACC_FAIL] = "Talker Access Failure", |
| 322 | [RSL_ERR_OM_INTERVENTION] = "O&M Intervention", |
| 323 | [RSL_ERR_NORMAL_UNSPEC] = "Normal event, unspecified", |
| 324 | [RSL_ERR_EQUIPMENT_FAIL] = "Equipment Failure", |
| 325 | [RSL_ERR_RR_UNAVAIL] = "Radio Resource not available", |
| 326 | [RSL_ERR_TERR_CH_FAIL] = "Terrestrial Channel Failure", |
| 327 | [RSL_ERR_CCCH_OVERLOAD] = "CCCH Overload", |
| 328 | [RSL_ERR_ACCH_OVERLOAD] = "ACCH Overload", |
| 329 | [RSL_ERR_PROCESSOR_OVERLOAD] = "Processor Overload", |
| 330 | [RSL_ERR_RES_UNAVAIL] = "Resource not available, unspecified", |
| 331 | [RSL_ERR_TRANSC_UNAVAIL] = "Transcoding not available", |
| 332 | [RSL_ERR_SERV_OPT_UNAVAIL] = "Service or Option not available", |
| 333 | [RSL_ERR_ENCR_UNIMPL] = "Encryption algorithm not implemented", |
| 334 | [RSL_ERR_SERV_OPT_UNIMPL] = "Service or Option not implemented", |
| 335 | [RSL_ERR_RCH_ALR_ACTV_ALLOC] = "Radio channel already activated", |
| 336 | [RSL_ERR_INVALID_MESSAGE] = "Invalid Message, unspecified", |
| 337 | [RSL_ERR_MSG_DISCR] = "Message Discriminator Error", |
| 338 | [RSL_ERR_MSG_TYPE] = "Message Type Error", |
| 339 | [RSL_ERR_MSG_SEQ] = "Message Sequence Error", |
| 340 | [RSL_ERR_IE_ERROR] = "General IE error", |
| 341 | [RSL_ERR_MAND_IE_ERROR] = "Mandatory IE error", |
| 342 | [RSL_ERR_OPT_IE_ERROR] = "Optional IE error", |
| 343 | [RSL_ERR_IE_NONEXIST] = "IE non-existent", |
| 344 | [RSL_ERR_IE_LENGTH] = "IE length error", |
| 345 | [RSL_ERR_IE_CONTENT] = "IE content error", |
| 346 | [RSL_ERR_PROTO] = "Protocol error, unspecified", |
| 347 | [RSL_ERR_INTERWORKING] = "Interworking error, unspecified", |
| 348 | }; |
| 349 | |
| 350 | static const char *rsl_err_name(u_int8_t err) |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 351 | { |
Harald Welte | 26cc168 | 2009-07-28 17:58:09 +0200 | [diff] [blame^] | 352 | if (rsl_err_vals[err]) |
| 353 | return rsl_err_vals[err]; |
| 354 | else |
| 355 | return "unknown"; |
| 356 | } |
| 357 | |
| 358 | static void print_rsl_cause(const u_int8_t *cause_v, u_int8_t cause_len) |
| 359 | { |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 360 | int i; |
| 361 | |
Harald Welte | 26cc168 | 2009-07-28 17:58:09 +0200 | [diff] [blame^] | 362 | DEBUGPC(DRSL, "CAUSE=0x%02x(%s) ", |
| 363 | cause_v[0], rsl_err_name(cause_v[0])); |
| 364 | for (i = 1; i < cause_len-1; i++) |
| 365 | DEBUGPC(DRSL, "%02x ", cause_v[i]); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 366 | } |
| 367 | |
| 368 | /* Send a BCCH_INFO message as per Chapter 8.5.1 */ |
| 369 | int rsl_bcch_info(struct gsm_bts_trx *trx, u_int8_t type, |
| 370 | const u_int8_t *data, int len) |
| 371 | { |
| 372 | struct abis_rsl_dchan_hdr *dh; |
| 373 | struct msgb *msg = rsl_msgb_alloc(); |
| 374 | |
| 375 | dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof*dh); |
| 376 | init_dchan_hdr(dh, RSL_MT_BCCH_INFO); |
| 377 | dh->chan_nr = RSL_CHAN_BCCH; |
| 378 | |
| 379 | msgb_tv_put(msg, RSL_IE_SYSINFO_TYPE, type); |
| 380 | msgb_tlv_put(msg, RSL_IE_FULL_BCCH_INFO, len, data); |
| 381 | |
| 382 | msg->trx = trx; |
| 383 | |
| 384 | return abis_rsl_sendmsg(msg); |
| 385 | } |
| 386 | |
| 387 | int rsl_sacch_filling(struct gsm_bts_trx *trx, u_int8_t type, |
| 388 | const u_int8_t *data, int len) |
| 389 | { |
| 390 | struct abis_rsl_common_hdr *ch; |
| 391 | struct msgb *msg = rsl_msgb_alloc(); |
| 392 | |
| 393 | ch = (struct abis_rsl_common_hdr *) msgb_put(msg, sizeof(*ch)); |
| 394 | ch->msg_discr = ABIS_RSL_MDISC_TRX; |
| 395 | ch->msg_type = RSL_MT_SACCH_FILL; |
| 396 | |
| 397 | msgb_tv_put(msg, RSL_IE_SYSINFO_TYPE, type); |
| 398 | msgb_tl16v_put(msg, RSL_IE_L3_INFO, len, data); |
| 399 | |
| 400 | msg->trx = trx; |
| 401 | |
| 402 | return abis_rsl_sendmsg(msg); |
| 403 | } |
| 404 | |
Harald Welte | 91afe4c | 2009-06-20 18:15:19 +0200 | [diff] [blame] | 405 | int rsl_chan_bs_power_ctrl(struct gsm_lchan *lchan, unsigned int fpc, int db) |
| 406 | { |
| 407 | struct abis_rsl_dchan_hdr *dh; |
Harald Welte | ed83184 | 2009-06-27 03:09:08 +0200 | [diff] [blame] | 408 | struct msgb *msg; |
Harald Welte | 91afe4c | 2009-06-20 18:15:19 +0200 | [diff] [blame] | 409 | u_int8_t chan_nr = lchan2chan_nr(lchan); |
| 410 | |
| 411 | db = abs(db); |
| 412 | if (db > 30) |
| 413 | return -EINVAL; |
| 414 | |
Harald Welte | ed83184 | 2009-06-27 03:09:08 +0200 | [diff] [blame] | 415 | msg = rsl_msgb_alloc(); |
| 416 | |
Harald Welte | 91afe4c | 2009-06-20 18:15:19 +0200 | [diff] [blame] | 417 | lchan->bs_power = db/2; |
| 418 | if (fpc) |
| 419 | lchan->bs_power |= 0x10; |
| 420 | |
| 421 | dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh)); |
| 422 | init_dchan_hdr(dh, RSL_MT_BS_POWER_CONTROL); |
| 423 | dh->chan_nr = chan_nr; |
| 424 | |
| 425 | msgb_tv_put(msg, RSL_IE_BS_POWER, lchan->bs_power); |
| 426 | |
| 427 | msg->trx = lchan->ts->trx; |
| 428 | |
| 429 | return abis_rsl_sendmsg(msg); |
| 430 | } |
| 431 | |
| 432 | /* determine power control level for given dBm value, as indicated |
| 433 | * by the tables in chapter 4.1.1 of GSM TS 05.05 */ |
| 434 | static int ms_pwr_ctl_lvl(struct gsm_bts *bts, unsigned int dbm) |
| 435 | { |
| 436 | switch (bts->band) { |
| 437 | case GSM_BAND_400: |
| 438 | case GSM_BAND_900: |
| 439 | case GSM_BAND_850: |
| 440 | if (dbm >= 39) |
| 441 | return 0; |
| 442 | else if (dbm < 5) |
| 443 | return 19; |
| 444 | else |
| 445 | return 2 + ((39 - dbm) / 2); |
| 446 | break; |
| 447 | case GSM_BAND_1800: |
| 448 | if (dbm >= 36) |
| 449 | return 29; |
| 450 | else if (dbm >= 34) |
| 451 | return 30; |
| 452 | else if (dbm >= 32) |
| 453 | return 31; |
| 454 | else |
| 455 | return (30 - dbm) / 2; |
| 456 | break; |
| 457 | case GSM_BAND_1900: |
| 458 | if (dbm >= 33) |
| 459 | return 30; |
| 460 | else if (dbm >= 32) |
| 461 | return 31; |
| 462 | else |
| 463 | return (30 - dbm) / 2; |
| 464 | break; |
| 465 | } |
| 466 | return -EINVAL; |
| 467 | } |
| 468 | |
Harald Welte | a1467eb | 2009-06-20 18:44:35 +0200 | [diff] [blame] | 469 | static int ms_pwr_dbm(enum gsm_band band, u_int8_t lvl) |
| 470 | { |
| 471 | lvl &= 0x1f; |
| 472 | |
| 473 | switch (band) { |
| 474 | case GSM_BAND_400: |
| 475 | case GSM_BAND_900: |
| 476 | case GSM_BAND_850: |
| 477 | if (lvl < 2) |
| 478 | return 39; |
| 479 | else if (lvl < 20) |
| 480 | return 39 - ((lvl - 2) * 2) ; |
| 481 | else |
| 482 | return 5; |
| 483 | break; |
| 484 | case GSM_BAND_1800: |
| 485 | if (lvl < 16) |
| 486 | return 30 - (lvl * 2); |
| 487 | else if (lvl < 29) |
| 488 | return 0; |
| 489 | else |
| 490 | return 36 - ((lvl - 29) * 2); |
| 491 | break; |
| 492 | case GSM_BAND_1900: |
| 493 | if (lvl < 16) |
| 494 | return 30 - (lvl * 2); |
| 495 | else if (lvl < 30) |
| 496 | return -EINVAL; |
| 497 | else |
| 498 | return 33 - (lvl - 30); |
| 499 | break; |
| 500 | } |
| 501 | return -EINVAL; |
| 502 | } |
| 503 | |
Harald Welte | 91afe4c | 2009-06-20 18:15:19 +0200 | [diff] [blame] | 504 | int rsl_chan_ms_power_ctrl(struct gsm_lchan *lchan, unsigned int fpc, int dbm) |
| 505 | { |
| 506 | struct abis_rsl_dchan_hdr *dh; |
Harald Welte | ed83184 | 2009-06-27 03:09:08 +0200 | [diff] [blame] | 507 | struct msgb *msg; |
Harald Welte | 91afe4c | 2009-06-20 18:15:19 +0200 | [diff] [blame] | 508 | u_int8_t chan_nr = lchan2chan_nr(lchan); |
| 509 | int ctl_lvl; |
| 510 | |
| 511 | ctl_lvl = ms_pwr_ctl_lvl(lchan->ts->trx->bts, dbm); |
| 512 | if (ctl_lvl < 0) |
| 513 | return ctl_lvl; |
| 514 | |
Harald Welte | ed83184 | 2009-06-27 03:09:08 +0200 | [diff] [blame] | 515 | msg = rsl_msgb_alloc(); |
| 516 | |
Harald Welte | 91afe4c | 2009-06-20 18:15:19 +0200 | [diff] [blame] | 517 | lchan->ms_power = ctl_lvl; |
| 518 | |
| 519 | if (fpc) |
| 520 | lchan->ms_power |= 0x20; |
| 521 | |
| 522 | dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh)); |
| 523 | init_dchan_hdr(dh, RSL_MT_MS_POWER_CONTROL); |
| 524 | dh->chan_nr = chan_nr; |
| 525 | |
| 526 | msgb_tv_put(msg, RSL_IE_MS_POWER, lchan->ms_power); |
| 527 | |
| 528 | msg->trx = lchan->ts->trx; |
| 529 | |
| 530 | return abis_rsl_sendmsg(msg); |
| 531 | } |
| 532 | |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 533 | /* Chapter 8.4.1 */ |
| 534 | #if 0 |
| 535 | int rsl_chan_activate(struct gsm_bts_trx *trx, u_int8_t chan_nr, |
| 536 | u_int8_t act_type, |
| 537 | struct rsl_ie_chan_mode *chan_mode, |
| 538 | struct rsl_ie_chan_ident *chan_ident, |
| 539 | u_int8_t bs_power, u_int8_t ms_power, |
| 540 | u_int8_t ta) |
| 541 | { |
| 542 | struct abis_rsl_dchan_hdr *dh; |
| 543 | struct msgb *msg = rsl_msgb_alloc(); |
| 544 | |
| 545 | dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh)); |
| 546 | init_dchan_hdr(dh, RSL_MT_CHAN_ACTIV); |
| 547 | dh->chan_nr = chan_nr; |
| 548 | |
| 549 | msgb_tv_put(msg, RSL_IE_ACT_TYPE, act_type); |
| 550 | /* For compatibility with Phase 1 */ |
| 551 | msgb_tlv_put(msg, RSL_IE_CHAN_MODE, sizeof(*chan_mode), |
| 552 | (u_int8_t *) chan_mode); |
| 553 | msgb_tlv_put(msg, RSL_IE_CHAN_IDENT, 4, |
| 554 | (u_int8_t *) chan_ident); |
| 555 | #if 0 |
| 556 | msgb_tlv_put(msg, RSL_IE_ENCR_INFO, 1, |
| 557 | (u_int8_t *) &encr_info); |
| 558 | #endif |
| 559 | msgb_tv_put(msg, RSL_IE_BS_POWER, bs_power); |
| 560 | msgb_tv_put(msg, RSL_IE_MS_POWER, ms_power); |
| 561 | msgb_tv_put(msg, RSL_IE_TIMING_ADVANCE, ta); |
| 562 | |
| 563 | msg->trx = trx; |
| 564 | |
| 565 | return abis_rsl_sendmsg(msg); |
| 566 | } |
| 567 | #endif |
| 568 | |
| 569 | int rsl_chan_activate_lchan(struct gsm_lchan *lchan, u_int8_t act_type, |
| 570 | u_int8_t ta, u_int8_t mode) |
| 571 | { |
| 572 | struct abis_rsl_dchan_hdr *dh; |
Harald Welte | ed83184 | 2009-06-27 03:09:08 +0200 | [diff] [blame] | 573 | struct msgb *msg; |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 574 | |
| 575 | u_int8_t chan_nr = lchan2chan_nr(lchan); |
| 576 | u_int16_t arfcn = lchan->ts->trx->arfcn; |
| 577 | struct rsl_ie_chan_mode cm; |
| 578 | struct rsl_ie_chan_ident ci; |
| 579 | |
| 580 | memset(&cm, 0, sizeof(cm)); |
| 581 | /* FIXME: what to do with data calls ? */ |
| 582 | cm.dtx_dtu = 0x00; |
| 583 | switch (lchan->type) { |
| 584 | case GSM_LCHAN_SDCCH: |
| 585 | cm.spd_ind = RSL_CMOD_SPD_SIGN; |
| 586 | cm.chan_rt = RSL_CMOD_CRT_SDCCH; |
| 587 | cm.chan_rate = 0x00; |
| 588 | break; |
| 589 | case GSM_LCHAN_TCH_F: |
| 590 | cm.chan_rt = RSL_CMOD_CRT_TCH_Bm; |
| 591 | switch (mode) { |
| 592 | case RSL_CMOD_SPD_SIGN: |
| 593 | cm.spd_ind = RSL_CMOD_SPD_SIGN; |
| 594 | cm.chan_rate = 0x00; |
| 595 | break; |
| 596 | case RSL_CMOD_SPD_SPEECH: |
| 597 | cm.spd_ind = RSL_CMOD_SPD_SPEECH; |
| 598 | cm.chan_rate = RSL_CMOD_SP_GSM2; |
| 599 | break; |
| 600 | } |
| 601 | break; |
| 602 | case GSM_LCHAN_TCH_H: |
| 603 | DEBUGP(DRSL, "Unimplemented TCH_H activation\n"); |
| 604 | return -1; |
| 605 | case GSM_LCHAN_UNKNOWN: |
| 606 | case GSM_LCHAN_NONE: |
| 607 | return -1; |
| 608 | } |
| 609 | |
| 610 | memset(&ci, 0, sizeof(ci)); |
| 611 | ci.chan_desc.iei = 0x64; |
| 612 | ci.chan_desc.chan_nr = chan_nr; |
| 613 | ci.chan_desc.oct3 = (lchan->ts->trx->bts->tsc << 5) | ((arfcn & 0x3ff) >> 8); |
| 614 | ci.chan_desc.oct4 = arfcn & 0xff; |
| 615 | |
Harald Welte | ed83184 | 2009-06-27 03:09:08 +0200 | [diff] [blame] | 616 | msg = rsl_msgb_alloc(); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 617 | dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh)); |
| 618 | init_dchan_hdr(dh, RSL_MT_CHAN_ACTIV); |
| 619 | dh->chan_nr = chan_nr; |
| 620 | |
| 621 | msgb_tv_put(msg, RSL_IE_ACT_TYPE, act_type); |
| 622 | /* For compatibility with Phase 1 */ |
| 623 | msgb_tlv_put(msg, RSL_IE_CHAN_MODE, sizeof(cm), |
| 624 | (u_int8_t *) &cm); |
| 625 | msgb_tlv_put(msg, RSL_IE_CHAN_IDENT, 4, |
| 626 | (u_int8_t *) &ci); |
| 627 | #if 0 |
| 628 | msgb_tlv_put(msg, RSL_IE_ENCR_INFO, 1, |
| 629 | (u_int8_t *) &encr_info); |
| 630 | #endif |
| 631 | msgb_tv_put(msg, RSL_IE_BS_POWER, lchan->bs_power); |
| 632 | msgb_tv_put(msg, RSL_IE_MS_POWER, lchan->ms_power); |
| 633 | msgb_tv_put(msg, RSL_IE_TIMING_ADVANCE, ta); |
| 634 | |
| 635 | msg->trx = lchan->ts->trx; |
| 636 | |
| 637 | return abis_rsl_sendmsg(msg); |
| 638 | } |
| 639 | |
| 640 | /* Chapter 8.4.9 */ |
| 641 | int rsl_chan_mode_modify_req(struct gsm_lchan *lchan) |
| 642 | { |
| 643 | struct abis_rsl_dchan_hdr *dh; |
Harald Welte | ed83184 | 2009-06-27 03:09:08 +0200 | [diff] [blame] | 644 | struct msgb *msg; |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 645 | |
| 646 | u_int8_t chan_nr = lchan2chan_nr(lchan); |
| 647 | struct rsl_ie_chan_mode cm; |
| 648 | |
| 649 | memset(&cm, 0, sizeof(cm)); |
| 650 | |
| 651 | /* FIXME: what to do with data calls ? */ |
| 652 | cm.dtx_dtu = 0x00; |
| 653 | switch (lchan->type) { |
| 654 | /* todo more modes */ |
| 655 | case GSM_LCHAN_TCH_F: |
| 656 | cm.spd_ind = RSL_CMOD_SPD_SPEECH; |
| 657 | cm.chan_rt = RSL_CMOD_CRT_TCH_Bm; |
| 658 | switch(lchan->tch_mode) { |
| 659 | case GSM48_CMODE_SPEECH_V1: |
| 660 | cm.chan_rate = RSL_CMOD_SP_GSM1; |
| 661 | break; |
| 662 | case GSM48_CMODE_SPEECH_EFR: |
| 663 | cm.chan_rate = RSL_CMOD_SP_GSM2; |
| 664 | break; |
| 665 | default: |
| 666 | DEBUGP(DRSL, "Unimplemented channel modification\n"); |
| 667 | return -1; |
| 668 | } |
| 669 | break; |
| 670 | default: |
| 671 | DEBUGP(DRSL, "Unimplemented channel modification\n"); |
| 672 | return -1; |
| 673 | } |
| 674 | |
Harald Welte | ed83184 | 2009-06-27 03:09:08 +0200 | [diff] [blame] | 675 | msg = rsl_msgb_alloc(); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 676 | dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh)); |
| 677 | init_dchan_hdr(dh, RSL_MT_MODE_MODIFY_REQ); |
| 678 | dh->chan_nr = chan_nr; |
| 679 | |
| 680 | msgb_tlv_put(msg, RSL_IE_CHAN_MODE, sizeof(cm), |
| 681 | (u_int8_t *) &cm); |
| 682 | #if 0 |
| 683 | msgb_tlv_put(msg, RSL_IE_ENCR_INFO, 1, |
| 684 | (u_int8_t *) &encr_info); |
| 685 | #endif |
| 686 | |
| 687 | msg->trx = lchan->ts->trx; |
| 688 | |
| 689 | return abis_rsl_sendmsg(msg); |
| 690 | } |
| 691 | |
Harald Welte | afe3c23 | 2009-07-19 18:36:49 +0200 | [diff] [blame] | 692 | /* Chapter 8.4.5 */ |
| 693 | int rsl_deact_sacch(struct gsm_lchan *lchan) |
| 694 | { |
| 695 | struct abis_rsl_dchan_hdr *dh; |
| 696 | struct msgb *msg = rsl_msgb_alloc(); |
| 697 | |
| 698 | dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh)); |
| 699 | init_dchan_hdr(dh, RSL_MT_DEACTIVATE_SACCH); |
| 700 | dh->chan_nr = lchan2chan_nr(lchan); |
| 701 | |
| 702 | msg->lchan = lchan; |
| 703 | msg->trx = lchan->ts->trx; |
| 704 | |
| 705 | DEBUGP(DRSL, "DEACTivate SACCH CMD channel=%s chan_nr=0x%02x\n", |
| 706 | gsm_ts_name(lchan->ts), dh->chan_nr); |
| 707 | |
| 708 | return abis_rsl_sendmsg(msg); |
| 709 | } |
| 710 | |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 711 | /* Chapter 9.1.7 of 04.08 */ |
| 712 | int rsl_chan_release(struct gsm_lchan *lchan) |
| 713 | { |
| 714 | struct abis_rsl_dchan_hdr *dh; |
| 715 | struct msgb *msg = rsl_msgb_alloc(); |
| 716 | |
| 717 | dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh)); |
| 718 | init_dchan_hdr(dh, RSL_MT_RF_CHAN_REL); |
| 719 | dh->chan_nr = lchan2chan_nr(lchan); |
| 720 | |
| 721 | msg->lchan = lchan; |
| 722 | msg->trx = lchan->ts->trx; |
| 723 | |
| 724 | DEBUGP(DRSL, "Channel Release CMD channel=%s chan_nr=0x%02x\n", |
| 725 | gsm_ts_name(lchan->ts), dh->chan_nr); |
| 726 | |
| 727 | return abis_rsl_sendmsg(msg); |
| 728 | } |
| 729 | |
| 730 | int rsl_paging_cmd(struct gsm_bts *bts, u_int8_t paging_group, u_int8_t len, |
| 731 | u_int8_t *ms_ident, u_int8_t chan_needed) |
| 732 | { |
| 733 | struct abis_rsl_dchan_hdr *dh; |
| 734 | struct msgb *msg = rsl_msgb_alloc(); |
| 735 | |
| 736 | dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh)); |
| 737 | init_dchan_hdr(dh, RSL_MT_PAGING_CMD); |
| 738 | dh->chan_nr = RSL_CHAN_PCH_AGCH; |
| 739 | |
| 740 | msgb_tv_put(msg, RSL_IE_PAGING_GROUP, paging_group); |
| 741 | msgb_tlv_put(msg, RSL_IE_MS_IDENTITY, len-2, ms_ident+2); |
| 742 | msgb_tv_put(msg, RSL_IE_CHAN_NEEDED, chan_needed); |
| 743 | |
| 744 | msg->trx = bts->c0; |
| 745 | |
| 746 | return abis_rsl_sendmsg(msg); |
| 747 | } |
| 748 | |
| 749 | int rsl_paging_cmd_subscr(struct gsm_bts *bts, u_int8_t chan_need, |
| 750 | struct gsm_subscriber *subscr) |
| 751 | { |
| 752 | #if 0 |
| 753 | u_int8_t mi[128]; |
| 754 | unsigned int mi_len; |
| 755 | u_int8_t paging_group; |
| 756 | #endif |
| 757 | |
| 758 | return -1; |
| 759 | } |
| 760 | |
| 761 | int imsi_str2bcd(u_int8_t *bcd_out, const char *str_in) |
| 762 | { |
| 763 | int i, len = strlen(str_in); |
| 764 | |
| 765 | for (i = 0; i < len; i++) { |
| 766 | int num = str_in[i] - 0x30; |
| 767 | if (num < 0 || num > 9) |
| 768 | return -1; |
| 769 | if (i % 2 == 0) |
| 770 | bcd_out[i/2] = num; |
| 771 | else |
| 772 | bcd_out[i/2] |= (num << 4); |
| 773 | } |
| 774 | |
| 775 | return 0; |
| 776 | } |
| 777 | |
| 778 | /* Chapter 8.5.6 */ |
| 779 | int rsl_imm_assign_cmd(struct gsm_bts *bts, u_int8_t len, u_int8_t *val) |
| 780 | { |
| 781 | struct msgb *msg = rsl_msgb_alloc(); |
| 782 | struct abis_rsl_dchan_hdr *dh; |
| 783 | u_int8_t buf[MACBLOCK_SIZE]; |
| 784 | |
| 785 | dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh)); |
| 786 | init_dchan_hdr(dh, RSL_MT_IMMEDIATE_ASSIGN_CMD); |
| 787 | dh->chan_nr = RSL_CHAN_PCH_AGCH; |
| 788 | |
| 789 | switch (bts->type) { |
| 790 | case GSM_BTS_TYPE_BS11: |
| 791 | msgb_tlv_put(msg, RSL_IE_IMM_ASS_INFO, len, val); |
| 792 | break; |
| 793 | default: |
| 794 | /* If phase 2, construct a FULL_IMM_ASS_INFO */ |
| 795 | pad_macblock(buf, val, len); |
| 796 | msgb_tlv_put(msg, RSL_IE_FULL_IMM_ASS_INFO, MACBLOCK_SIZE, buf); |
| 797 | break; |
| 798 | } |
| 799 | |
| 800 | msg->trx = bts->c0; |
| 801 | |
| 802 | return abis_rsl_sendmsg(msg); |
| 803 | } |
| 804 | |
| 805 | /* Send "DATA REQUEST" message with given L3 Info payload */ |
| 806 | /* Chapter 8.3.1 */ |
| 807 | int rsl_data_request(struct msgb *msg, u_int8_t link_id) |
| 808 | { |
| 809 | u_int8_t l3_len = msg->tail - (u_int8_t *)msgb_l3(msg); |
| 810 | struct abis_rsl_rll_hdr *rh; |
| 811 | |
| 812 | if (msg->lchan == NULL) { |
| 813 | fprintf(stderr, "cannot send DATA REQUEST to unknown lchan\n"); |
| 814 | return -EINVAL; |
| 815 | } |
| 816 | |
| 817 | /* First push the L3 IE tag and length */ |
| 818 | msgb_tv16_push(msg, RSL_IE_L3_INFO, l3_len); |
| 819 | |
| 820 | /* Then push the RSL header */ |
| 821 | rh = (struct abis_rsl_rll_hdr *) msgb_push(msg, sizeof(*rh)); |
| 822 | init_llm_hdr(rh, RSL_MT_DATA_REQ); |
| 823 | rh->c.msg_discr |= ABIS_RSL_MDISC_TRANSP; |
| 824 | rh->chan_nr = lchan2chan_nr(msg->lchan); |
| 825 | rh->link_id = link_id; |
| 826 | |
| 827 | msg->trx = msg->lchan->ts->trx; |
| 828 | |
| 829 | return abis_rsl_sendmsg(msg); |
| 830 | } |
| 831 | |
| 832 | /* Chapter 8.4.2: Channel Activate Acknowledge */ |
| 833 | static int rsl_rx_chan_act_ack(struct msgb *msg) |
| 834 | { |
| 835 | struct abis_rsl_dchan_hdr *rslh = msgb_l2(msg); |
| 836 | |
| 837 | /* BTS has confirmed channel activation, we now need |
| 838 | * to assign the activated channel to the MS */ |
| 839 | if (rslh->ie_chan != RSL_IE_CHAN_NR) |
| 840 | return -EINVAL; |
| 841 | |
| 842 | return 0; |
| 843 | } |
| 844 | |
| 845 | /* Chapter 8.4.3: Channel Activate NACK */ |
| 846 | static int rsl_rx_chan_act_nack(struct msgb *msg) |
| 847 | { |
| 848 | struct abis_rsl_dchan_hdr *dh = msgb_l2(msg); |
| 849 | struct tlv_parsed tp; |
| 850 | |
| 851 | /* BTS has rejected channel activation ?!? */ |
| 852 | if (dh->ie_chan != RSL_IE_CHAN_NR) |
| 853 | return -EINVAL; |
| 854 | |
| 855 | rsl_tlv_parse(&tp, dh->data, msgb_l2len(msg)-sizeof(*dh)); |
| 856 | if (TLVP_PRESENT(&tp, RSL_IE_CAUSE)) |
Harald Welte | 26cc168 | 2009-07-28 17:58:09 +0200 | [diff] [blame^] | 857 | print_rsl_cause(TLVP_VAL(&tp, RSL_IE_CAUSE), |
| 858 | TLVP_LEN(&tp, RSL_IE_CAUSE)); |
| 859 | |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 860 | return 0; |
| 861 | } |
| 862 | |
| 863 | /* Chapter 8.4.4: Connection Failure Indication */ |
| 864 | static int rsl_rx_conn_fail(struct msgb *msg) |
| 865 | { |
| 866 | struct abis_rsl_dchan_hdr *dh = msgb_l2(msg); |
| 867 | struct tlv_parsed tp; |
| 868 | |
| 869 | DEBUGPC(DRSL, "CONNECTION FAIL: "); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 870 | |
| 871 | rsl_tlv_parse(&tp, dh->data, msgb_l2len(msg)-sizeof(*dh)); |
| 872 | |
Harald Welte | 26cc168 | 2009-07-28 17:58:09 +0200 | [diff] [blame^] | 873 | if (TLVP_PRESENT(&tp, RSL_IE_CAUSE)) |
| 874 | print_rsl_cause(TLVP_VAL(&tp, RSL_IE_CAUSE), |
| 875 | TLVP_LEN(&tp, RSL_IE_CAUSE)); |
| 876 | |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 877 | if (msg->trx->bts->type == GSM_BTS_TYPE_BS11) { |
| 878 | /* FIXME: we have no idea what cause 0x18 is !!! */ |
| 879 | if (TLVP_PRESENT(&tp, RSL_IE_CAUSE) && |
| 880 | TLVP_LEN(&tp, RSL_IE_CAUSE) >= 1 && |
| 881 | *TLVP_VAL(&tp, RSL_IE_CAUSE) == 0x18) { |
Harald Welte | df0c650 | 2009-07-04 10:05:51 +0200 | [diff] [blame] | 882 | DEBUGPC(DRSL, "Cause 0x18 IGNORING\n"); |
| 883 | return 0; |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 884 | } |
| 885 | } |
| 886 | |
| 887 | DEBUGPC(DRSL, "RELEASING.\n"); |
| 888 | |
| 889 | /* FIXME: only free it after channel release ACK */ |
| 890 | return rsl_chan_release(msg->lchan); |
| 891 | } |
| 892 | |
| 893 | static int rsl_rx_meas_res(struct msgb *msg) |
| 894 | { |
| 895 | struct abis_rsl_dchan_hdr *dh = msgb_l2(msg); |
| 896 | struct tlv_parsed tp; |
| 897 | |
Harald Welte | 0299368 | 2009-06-27 02:53:10 +0200 | [diff] [blame] | 898 | DEBUGPC(DMEAS, "MEASUREMENT RESULT "); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 899 | rsl_tlv_parse(&tp, dh->data, msgb_l2len(msg)-sizeof(*dh)); |
| 900 | |
| 901 | if (TLVP_PRESENT(&tp, RSL_IE_MEAS_RES_NR)) |
Harald Welte | 0299368 | 2009-06-27 02:53:10 +0200 | [diff] [blame] | 902 | DEBUGPC(DMEAS, "NR=%d ", *TLVP_VAL(&tp, RSL_IE_MEAS_RES_NR)); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 903 | if (TLVP_PRESENT(&tp, RSL_IE_UPLINK_MEAS)) { |
| 904 | u_int8_t len = TLVP_LEN(&tp, RSL_IE_UPLINK_MEAS); |
| 905 | const u_int8_t *val = TLVP_VAL(&tp, RSL_IE_UPLINK_MEAS); |
| 906 | if (len >= 3) { |
| 907 | if (val[0] & 0x40) |
Harald Welte | 0299368 | 2009-06-27 02:53:10 +0200 | [diff] [blame] | 908 | DEBUGPC(DMEAS, "DTXd "); |
| 909 | DEBUGPC(DMEAS, "RXL-FULL-up=%d RXL-SUB-up=%d ", |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 910 | val[0] & 0x3f, val[1] & 0x3f); |
Harald Welte | 0299368 | 2009-06-27 02:53:10 +0200 | [diff] [blame] | 911 | DEBUGPC(DMEAS, "RXQ-FULL-up=%d RXQ-SUB-up=%d ", |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 912 | val[2]>>3 & 0x7, val[2] & 0x7); |
| 913 | } |
| 914 | } |
| 915 | if (TLVP_PRESENT(&tp, RSL_IE_BS_POWER)) |
Harald Welte | 0299368 | 2009-06-27 02:53:10 +0200 | [diff] [blame] | 916 | DEBUGPC(DMEAS, "BS_POWER=%d ", *TLVP_VAL(&tp, RSL_IE_BS_POWER)); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 917 | if (TLVP_PRESENT(&tp, RSL_IE_MS_TIMING_OFFSET)) |
Harald Welte | 0299368 | 2009-06-27 02:53:10 +0200 | [diff] [blame] | 918 | DEBUGPC(DMEAS, "MS_TO=%d ", |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 919 | *TLVP_VAL(&tp, RSL_IE_MS_TIMING_OFFSET)); |
Harald Welte | a1467eb | 2009-06-20 18:44:35 +0200 | [diff] [blame] | 920 | if (TLVP_PRESENT(&tp, RSL_IE_L1_INFO)) { |
Harald Welte | b949895 | 2009-07-12 09:45:05 +0200 | [diff] [blame] | 921 | const u_int8_t *val = TLVP_VAL(&tp, RSL_IE_L1_INFO); |
Harald Welte | a1467eb | 2009-06-20 18:44:35 +0200 | [diff] [blame] | 922 | u_int8_t pwr_lvl = val[0] >> 3; |
Harald Welte | 0299368 | 2009-06-27 02:53:10 +0200 | [diff] [blame] | 923 | DEBUGPC(DMEAS, "L1_MS_PWR=%ddBm ", |
Harald Welte | a1467eb | 2009-06-20 18:44:35 +0200 | [diff] [blame] | 924 | ms_pwr_dbm(msg->trx->bts->band, pwr_lvl)); |
Harald Welte | 0299368 | 2009-06-27 02:53:10 +0200 | [diff] [blame] | 925 | DEBUGPC(DMEAS, "L1_FPC=%u ", val[0] & 0x04 ? 1 : 0); |
| 926 | DEBUGPC(DMEAS, "L1_TA=%u ", val[1]); |
Harald Welte | a1467eb | 2009-06-20 18:44:35 +0200 | [diff] [blame] | 927 | } |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 928 | if (TLVP_PRESENT(&tp, RSL_IE_L3_INFO)) { |
Harald Welte | 0299368 | 2009-06-27 02:53:10 +0200 | [diff] [blame] | 929 | DEBUGPC(DMEAS, "L3\n"); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 930 | msg->l3h = TLVP_VAL(&tp, RSL_IE_L3_INFO); |
| 931 | return gsm0408_rcvmsg(msg); |
| 932 | } else |
Harald Welte | 0299368 | 2009-06-27 02:53:10 +0200 | [diff] [blame] | 933 | DEBUGPC(DMEAS, "\n"); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 934 | |
| 935 | return 0; |
| 936 | } |
| 937 | |
| 938 | static int abis_rsl_rx_dchan(struct msgb *msg) |
| 939 | { |
| 940 | struct abis_rsl_dchan_hdr *rslh = msgb_l2(msg); |
| 941 | int rc = 0; |
| 942 | char *ts_name; |
| 943 | |
| 944 | msg->lchan = lchan_lookup(msg->trx, rslh->chan_nr); |
| 945 | ts_name = gsm_ts_name(msg->lchan->ts); |
| 946 | |
Harald Welte | 0299368 | 2009-06-27 02:53:10 +0200 | [diff] [blame] | 947 | if (rslh->c.msg_type != RSL_MT_MEAS_RES) |
| 948 | 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] | 949 | |
| 950 | switch (rslh->c.msg_type) { |
| 951 | case RSL_MT_CHAN_ACTIV_ACK: |
| 952 | DEBUGPC(DRSL, "CHANNEL ACTIVATE ACK\n"); |
| 953 | rc = rsl_rx_chan_act_ack(msg); |
| 954 | break; |
| 955 | case RSL_MT_CHAN_ACTIV_NACK: |
| 956 | DEBUGPC(DRSL, "CHANNEL ACTIVATE NACK\n"); |
| 957 | rc = rsl_rx_chan_act_nack(msg); |
| 958 | break; |
| 959 | case RSL_MT_CONN_FAIL: |
| 960 | rc = rsl_rx_conn_fail(msg); |
| 961 | break; |
| 962 | case RSL_MT_MEAS_RES: |
| 963 | rc = rsl_rx_meas_res(msg); |
| 964 | break; |
| 965 | case RSL_MT_RF_CHAN_REL_ACK: |
| 966 | DEBUGPC(DRSL, "RF CHANNEL RELEASE ACK\n"); |
| 967 | lchan_free(msg->lchan); |
| 968 | break; |
| 969 | case RSL_MT_MODE_MODIFY_ACK: |
| 970 | DEBUGPC(DRSL, "CHANNEL MODE MODIFY ACK\n"); |
| 971 | break; |
| 972 | case RSL_MT_MODE_MODIFY_NACK: |
| 973 | DEBUGPC(DRSL, "CHANNEL MODE MODIFY NACK\n"); |
| 974 | break; |
| 975 | case RSL_MT_PHY_CONTEXT_CONF: |
| 976 | case RSL_MT_PREPROC_MEAS_RES: |
| 977 | case RSL_MT_TALKER_DET: |
| 978 | case RSL_MT_LISTENER_DET: |
| 979 | case RSL_MT_REMOTE_CODEC_CONF_REP: |
| 980 | case RSL_MT_MR_CODEC_MOD_ACK: |
| 981 | case RSL_MT_MR_CODEC_MOD_NACK: |
| 982 | case RSL_MT_MR_CODEC_MOD_PER: |
| 983 | DEBUGPC(DRSL, "Unimplemented Abis RSL DChan msg 0x%02x\n", |
| 984 | rslh->c.msg_type); |
| 985 | break; |
| 986 | default: |
| 987 | DEBUGPC(DRSL, "unknown Abis RSL DChan msg 0x%02x\n", |
| 988 | rslh->c.msg_type); |
| 989 | return -EINVAL; |
| 990 | } |
| 991 | |
| 992 | return rc; |
| 993 | } |
| 994 | |
| 995 | static int rsl_rx_error_rep(struct msgb *msg) |
| 996 | { |
| 997 | struct abis_rsl_common_hdr *rslh = msgb_l2(msg); |
Harald Welte | 26cc168 | 2009-07-28 17:58:09 +0200 | [diff] [blame^] | 998 | struct tlv_parsed tp; |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 999 | |
| 1000 | DEBUGP(DRSL, "ERROR REPORT "); |
Harald Welte | 26cc168 | 2009-07-28 17:58:09 +0200 | [diff] [blame^] | 1001 | |
| 1002 | rsl_tlv_parse(&tp, rslh->data, msgb_l2len(msg)-sizeof(*rslh)); |
| 1003 | |
| 1004 | if (TLVP_PRESENT(&tp, RSL_IE_CAUSE)) |
| 1005 | print_rsl_cause(TLVP_VAL(&tp, RSL_IE_CAUSE), |
| 1006 | TLVP_LEN(&tp, RSL_IE_CAUSE)); |
| 1007 | |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1008 | DEBUGPC(DRSL, "\n"); |
| 1009 | |
| 1010 | return 0; |
| 1011 | } |
| 1012 | |
| 1013 | static int abis_rsl_rx_trx(struct msgb *msg) |
| 1014 | { |
| 1015 | struct abis_rsl_common_hdr *rslh = msgb_l2(msg); |
| 1016 | int rc = 0; |
| 1017 | |
| 1018 | switch (rslh->msg_type) { |
| 1019 | case RSL_MT_ERROR_REPORT: |
| 1020 | rc = rsl_rx_error_rep(msg); |
| 1021 | break; |
| 1022 | case RSL_MT_RF_RES_IND: |
| 1023 | /* interference on idle channels of TRX */ |
| 1024 | //DEBUGP(DRSL, "TRX: RF Interference Indication\n"); |
| 1025 | break; |
| 1026 | case RSL_MT_OVERLOAD: |
| 1027 | /* indicate CCCH / ACCH / processor overload */ |
| 1028 | DEBUGP(DRSL, "TRX: CCCH/ACCH/CPU Overload\n"); |
| 1029 | break; |
| 1030 | default: |
| 1031 | DEBUGP(DRSL, "Unknown Abis RSL TRX message type 0x%02x\n", |
| 1032 | rslh->msg_type); |
| 1033 | return -EINVAL; |
| 1034 | } |
| 1035 | return rc; |
| 1036 | } |
| 1037 | |
| 1038 | /* MS has requested a channel on the RACH */ |
| 1039 | static int rsl_rx_chan_rqd(struct msgb *msg) |
| 1040 | { |
| 1041 | struct gsm_bts *bts = msg->trx->bts; |
| 1042 | struct abis_rsl_dchan_hdr *rqd_hdr = msgb_l2(msg); |
| 1043 | struct gsm48_req_ref *rqd_ref; |
| 1044 | struct gsm48_imm_ass ia; |
| 1045 | enum gsm_chan_t lctype; |
| 1046 | enum gsm_chreq_reason_t chreq_reason; |
| 1047 | struct gsm_lchan *lchan; |
| 1048 | u_int8_t rqd_ta; |
| 1049 | int ret; |
| 1050 | |
| 1051 | u_int16_t arfcn; |
| 1052 | u_int8_t ts_number, subch; |
| 1053 | |
| 1054 | /* parse request reference to be used in immediate assign */ |
| 1055 | if (rqd_hdr->data[0] != RSL_IE_REQ_REFERENCE) |
| 1056 | return -EINVAL; |
| 1057 | |
| 1058 | rqd_ref = (struct gsm48_req_ref *) &rqd_hdr->data[1]; |
| 1059 | |
| 1060 | /* parse access delay and use as TA */ |
| 1061 | if (rqd_hdr->data[sizeof(struct gsm48_req_ref)+1] != RSL_IE_ACCESS_DELAY) |
| 1062 | return -EINVAL; |
| 1063 | rqd_ta = rqd_hdr->data[sizeof(struct gsm48_req_ref)+2]; |
| 1064 | |
| 1065 | /* determine channel type (SDCCH/TCH_F/TCH_H) based on |
| 1066 | * request reference RA */ |
| 1067 | lctype = get_ctype_by_chreq(bts, rqd_ref->ra); |
| 1068 | chreq_reason = get_reason_by_chreq(bts, rqd_ref->ra); |
| 1069 | |
| 1070 | /* check availability / allocate channel */ |
| 1071 | lchan = lchan_alloc(bts, lctype); |
| 1072 | if (!lchan) { |
| 1073 | fprintf(stderr, "CHAN RQD: no resources\n"); |
| 1074 | /* FIXME: send some kind of reject ?!? */ |
| 1075 | return -ENOMEM; |
| 1076 | } |
| 1077 | |
| 1078 | ts_number = lchan->ts->nr; |
| 1079 | arfcn = lchan->ts->trx->arfcn; |
| 1080 | subch = lchan->nr; |
| 1081 | |
| 1082 | lchan->ms_power = lchan->bs_power = 0x0f; /* 30dB reduction */ |
| 1083 | rsl_chan_activate_lchan(lchan, 0x00, rqd_ta, RSL_CMOD_SPD_SIGN); |
| 1084 | |
| 1085 | /* create IMMEDIATE ASSIGN 04.08 messge */ |
| 1086 | memset(&ia, 0, sizeof(ia)); |
| 1087 | ia.l2_plen = 0x2d; |
| 1088 | ia.proto_discr = GSM48_PDISC_RR; |
| 1089 | ia.msg_type = GSM48_MT_RR_IMM_ASS; |
| 1090 | ia.page_mode = GSM48_PM_SAME; |
| 1091 | ia.chan_desc.chan_nr = lchan2chan_nr(lchan); |
| 1092 | ia.chan_desc.h0.h = 0; |
| 1093 | ia.chan_desc.h0.arfcn_high = arfcn >> 8; |
| 1094 | ia.chan_desc.h0.arfcn_low = arfcn & 0xff; |
Harald Welte | 63d23c8 | 2009-07-21 20:55:56 +0200 | [diff] [blame] | 1095 | ia.chan_desc.h0.tsc = bts->tsc; |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1096 | /* use request reference extracted from CHAN_RQD */ |
| 1097 | memcpy(&ia.req_ref, rqd_ref, sizeof(ia.req_ref)); |
| 1098 | ia.timing_advance = rqd_ta; |
| 1099 | ia.mob_alloc_len = 0; |
| 1100 | |
| 1101 | DEBUGP(DRSL, "Activating ARFCN(%u) TS(%u) SS(%u) lctype %s " |
| 1102 | "chan_nr=0x%02x r=%s ra=0x%02x\n", |
| 1103 | arfcn, ts_number, subch, gsm_lchan_name(lchan->type), |
| 1104 | ia.chan_desc.chan_nr, gsm_chreq_name(chreq_reason), |
| 1105 | rqd_ref->ra); |
| 1106 | |
| 1107 | /* FIXME: Start timer T3101 to wait for GSM48_MT_RR_PAG_RESP */ |
| 1108 | |
| 1109 | /* send IMMEDIATE ASSIGN CMD on RSL to BTS (to send on CCCH to MS) */ |
| 1110 | ret = rsl_imm_assign_cmd(bts, sizeof(ia), (u_int8_t *) &ia); |
| 1111 | |
| 1112 | return ret; |
| 1113 | } |
| 1114 | |
| 1115 | /* MS has requested a channel on the RACH */ |
| 1116 | static int rsl_rx_ccch_load(struct msgb *msg) |
| 1117 | { |
| 1118 | struct abis_rsl_dchan_hdr *rslh = msgb_l2(msg); |
| 1119 | u_int16_t pg_buf_space; |
| 1120 | u_int16_t rach_slot_count = -1; |
| 1121 | u_int16_t rach_busy_count = -1; |
| 1122 | u_int16_t rach_access_count = -1; |
| 1123 | |
| 1124 | switch (rslh->data[0]) { |
| 1125 | case RSL_IE_PAGING_LOAD: |
| 1126 | pg_buf_space = rslh->data[1] << 8 | rslh->data[2]; |
| 1127 | paging_update_buffer_space(msg->trx->bts, pg_buf_space); |
| 1128 | break; |
| 1129 | case RSL_IE_RACH_LOAD: |
| 1130 | if (msg->data_len >= 7) { |
| 1131 | rach_slot_count = rslh->data[2] << 8 | rslh->data[3]; |
| 1132 | rach_busy_count = rslh->data[4] << 8 | rslh->data[5]; |
| 1133 | rach_access_count = rslh->data[6] << 8 | rslh->data[7]; |
| 1134 | } |
| 1135 | break; |
| 1136 | default: |
| 1137 | break; |
| 1138 | } |
| 1139 | |
| 1140 | return 0; |
| 1141 | } |
| 1142 | |
| 1143 | static int abis_rsl_rx_cchan(struct msgb *msg) |
| 1144 | { |
| 1145 | struct abis_rsl_dchan_hdr *rslh = msgb_l2(msg); |
| 1146 | int rc = 0; |
| 1147 | |
| 1148 | msg->lchan = lchan_lookup(msg->trx, rslh->chan_nr); |
| 1149 | |
| 1150 | switch (rslh->c.msg_type) { |
| 1151 | case RSL_MT_CHAN_RQD: |
| 1152 | /* MS has requested a channel on the RACH */ |
| 1153 | rc = rsl_rx_chan_rqd(msg); |
| 1154 | break; |
| 1155 | case RSL_MT_CCCH_LOAD_IND: |
| 1156 | /* current load on the CCCH */ |
| 1157 | rc = rsl_rx_ccch_load(msg); |
| 1158 | break; |
| 1159 | case RSL_MT_DELETE_IND: |
| 1160 | /* CCCH overloaded, IMM_ASSIGN was dropped */ |
| 1161 | case RSL_MT_CBCH_LOAD_IND: |
| 1162 | /* current load on the CBCH */ |
| 1163 | fprintf(stderr, "Unimplemented Abis RSL TRX message type " |
| 1164 | "0x%02x\n", rslh->c.msg_type); |
| 1165 | break; |
| 1166 | default: |
| 1167 | fprintf(stderr, "Unknown Abis RSL TRX message type 0x%02x\n", |
| 1168 | rslh->c.msg_type); |
| 1169 | return -EINVAL; |
| 1170 | } |
| 1171 | |
| 1172 | return rc; |
| 1173 | } |
| 1174 | |
| 1175 | static int rsl_rx_rll_err_ind(struct msgb *msg) |
| 1176 | { |
| 1177 | struct abis_rsl_rll_hdr *rllh = msgb_l2(msg); |
| 1178 | u_int8_t *rlm_cause = rllh->data; |
| 1179 | |
| 1180 | DEBUGPC(DRLL, "cause=0x%02x", rlm_cause[1]); |
| 1181 | |
Harald Welte | 692f585 | 2009-07-04 09:40:05 +0200 | [diff] [blame] | 1182 | if (rlm_cause[1] == RLL_CAUSE_T200_EXPIRED) |
| 1183 | return rsl_chan_release(msg->lchan); |
| 1184 | |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1185 | return 0; |
| 1186 | } |
| 1187 | |
| 1188 | /* ESTABLISH INDICATION, LOCATION AREA UPDATE REQUEST |
| 1189 | 0x02, 0x06, |
| 1190 | 0x01, 0x20, |
| 1191 | 0x02, 0x00, |
| 1192 | 0x0b, 0x00, 0x0f, 0x05, 0x08, ... */ |
| 1193 | |
| 1194 | static int abis_rsl_rx_rll(struct msgb *msg) |
| 1195 | { |
| 1196 | struct abis_rsl_rll_hdr *rllh = msgb_l2(msg); |
| 1197 | int rc = 0; |
| 1198 | char *ts_name; |
| 1199 | |
| 1200 | msg->lchan = lchan_lookup(msg->trx, rllh->chan_nr); |
| 1201 | ts_name = gsm_ts_name(msg->lchan->ts); |
| 1202 | DEBUGP(DRLL, "channel=%s chan_nr=0x%02x ", ts_name, rllh->chan_nr); |
| 1203 | |
| 1204 | switch (rllh->c.msg_type) { |
| 1205 | case RSL_MT_DATA_IND: |
| 1206 | DEBUGPC(DRLL, "DATA INDICATION\n"); |
| 1207 | if (msgb_l2len(msg) > |
| 1208 | sizeof(struct abis_rsl_common_hdr) + sizeof(*rllh) && |
| 1209 | rllh->data[0] == RSL_IE_L3_INFO) { |
| 1210 | msg->l3h = &rllh->data[3]; |
| 1211 | return gsm0408_rcvmsg(msg); |
| 1212 | } |
| 1213 | break; |
| 1214 | case RSL_MT_EST_IND: |
| 1215 | DEBUGPC(DRLL, "ESTABLISH INDICATION\n"); |
| 1216 | if (msgb_l2len(msg) > |
| 1217 | sizeof(struct abis_rsl_common_hdr) + sizeof(*rllh) && |
| 1218 | rllh->data[0] == RSL_IE_L3_INFO) { |
| 1219 | msg->l3h = &rllh->data[3]; |
| 1220 | return gsm0408_rcvmsg(msg); |
| 1221 | } |
| 1222 | break; |
| 1223 | case RSL_MT_REL_IND: |
| 1224 | DEBUGPC(DRLL, "RELEASE INDICATION "); |
| 1225 | break; |
| 1226 | case RSL_MT_REL_CONF: |
| 1227 | DEBUGPC(DRLL, "RELEASE CONFIRMATION "); |
| 1228 | break; |
| 1229 | case RSL_MT_ERROR_IND: |
| 1230 | DEBUGPC(DRLL, "ERROR INDICATION "); |
| 1231 | rc = rsl_rx_rll_err_ind(msg); |
| 1232 | break; |
| 1233 | case RSL_MT_UNIT_DATA_IND: |
| 1234 | DEBUGPC(DRLL, "unimplemented Abis RLL message type 0x%02x ", |
| 1235 | rllh->c.msg_type); |
| 1236 | break; |
| 1237 | default: |
| 1238 | DEBUGPC(DRLL, "unknown Abis RLL message type 0x%02x ", |
| 1239 | rllh->c.msg_type); |
| 1240 | } |
| 1241 | DEBUGPC(DRLL, "\n"); |
| 1242 | return rc; |
| 1243 | } |
| 1244 | |
| 1245 | /* ip.access specific RSL extensions */ |
| 1246 | int rsl_ipacc_bind(struct gsm_lchan *lchan) |
| 1247 | { |
| 1248 | struct msgb *msg = rsl_msgb_alloc(); |
| 1249 | struct abis_rsl_dchan_hdr *dh; |
| 1250 | |
| 1251 | dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh)); |
| 1252 | init_dchan_hdr(dh, RSL_MT_IPAC_BIND); |
| 1253 | dh->c.msg_discr = ABIS_RSL_MDISC_IPACCESS; |
| 1254 | dh->chan_nr = lchan2chan_nr(lchan); |
| 1255 | |
| 1256 | msg->trx = lchan->ts->trx; |
| 1257 | |
| 1258 | return abis_rsl_sendmsg(msg); |
| 1259 | } |
| 1260 | |
Harald Welte | 8cdeaad | 2009-07-12 09:50:35 +0200 | [diff] [blame] | 1261 | int rsl_ipacc_connect(struct gsm_lchan *lchan, u_int32_t ip, u_int16_t port, |
| 1262 | u_int16_t conn_id, u_int8_t rtp_payload2) |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1263 | { |
| 1264 | struct msgb *msg = rsl_msgb_alloc(); |
| 1265 | struct abis_rsl_dchan_hdr *dh; |
| 1266 | u_int8_t *att_f8, *att_ip, *att_port; |
| 1267 | |
| 1268 | dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh)); |
| 1269 | init_dchan_hdr(dh, RSL_MT_IPAC_CONNECT); |
| 1270 | dh->c.msg_discr = ABIS_RSL_MDISC_IPACCESS; |
| 1271 | dh->chan_nr = lchan2chan_nr(lchan); |
| 1272 | |
Harald Welte | 8cdeaad | 2009-07-12 09:50:35 +0200 | [diff] [blame] | 1273 | att_f8 = msgb_put(msg, sizeof(conn_id)+1); |
Harald Welte | b949895 | 2009-07-12 09:45:05 +0200 | [diff] [blame] | 1274 | att_f8[0] = RSL_IE_IPAC_CONN_ID; |
Harald Welte | 8cdeaad | 2009-07-12 09:50:35 +0200 | [diff] [blame] | 1275 | att_f8[1] = conn_id >> 8; |
| 1276 | att_f8[2] = conn_id & 0xff; |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1277 | |
| 1278 | att_ip = msgb_put(msg, sizeof(ip)+1); |
| 1279 | att_ip[0] = RSL_IE_IPAC_REMOTE_IP; |
| 1280 | att_ip[1] = ip >> 24; |
| 1281 | att_ip[2] = ip >> 16; |
| 1282 | att_ip[3] = ip >> 8; |
| 1283 | att_ip[4] = ip & 0xff; |
| 1284 | //att_ip[4] = 11; |
| 1285 | |
| 1286 | att_port = msgb_put(msg, sizeof(port)+1); |
| 1287 | att_port[0] = RSL_IE_IPAC_REMOTE_PORT; |
| 1288 | att_port[1] = port >> 8; |
| 1289 | att_port[2] = port & 0xff; |
| 1290 | |
Harald Welte | b949895 | 2009-07-12 09:45:05 +0200 | [diff] [blame] | 1291 | msgb_tv_put(msg, RSL_IE_IPAC_SPEECH_MODE, 1); /* F4 01 */ |
Harald Welte | 8cdeaad | 2009-07-12 09:50:35 +0200 | [diff] [blame] | 1292 | msgb_tv_put(msg, RSL_IE_IPAC_RTP_PAYLOAD2, rtp_payload2); /* FC 7F */ |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1293 | msg->trx = lchan->ts->trx; |
| 1294 | |
| 1295 | return abis_rsl_sendmsg(msg); |
| 1296 | } |
| 1297 | |
| 1298 | static int abis_rsl_rx_ipacc_bindack(struct msgb *msg) |
| 1299 | { |
| 1300 | struct abis_rsl_dchan_hdr *dh = msgb_l2(msg); |
| 1301 | struct tlv_parsed tv; |
| 1302 | struct gsm_bts_trx_ts *ts = msg->lchan->ts; |
| 1303 | struct in_addr ip; |
| 1304 | u_int16_t port, attr_f8; |
| 1305 | |
| 1306 | /* the BTS has acknowledged a local bind, it now tells us the IP |
| 1307 | * address and port number to which it has bound the given logical |
| 1308 | * channel */ |
| 1309 | |
| 1310 | rsl_tlv_parse(&tv, dh->data, msgb_l2len(msg)-sizeof(*dh)); |
| 1311 | if (!TLVP_PRESENT(&tv, RSL_IE_IPAC_LOCAL_PORT) || |
| 1312 | !TLVP_PRESENT(&tv, RSL_IE_IPAC_LOCAL_IP) || |
Harald Welte | b949895 | 2009-07-12 09:45:05 +0200 | [diff] [blame] | 1313 | !TLVP_PRESENT(&tv, RSL_IE_IPAC_RTP_PAYLOAD2) || |
| 1314 | !TLVP_PRESENT(&tv, RSL_IE_IPAC_CONN_ID)) { |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1315 | DEBUGPC(DRSL, "mandatory IE missing"); |
| 1316 | return -EINVAL; |
| 1317 | } |
| 1318 | ip.s_addr = *((u_int32_t *) TLVP_VAL(&tv, RSL_IE_IPAC_LOCAL_IP)); |
| 1319 | port = *((u_int16_t *) TLVP_VAL(&tv, RSL_IE_IPAC_LOCAL_PORT)); |
| 1320 | attr_f8 = *((u_int16_t *) TLVP_VAL(&tv, 0xf8)); |
| 1321 | |
Harald Welte | b949895 | 2009-07-12 09:45:05 +0200 | [diff] [blame] | 1322 | DEBUGPC(DRSL, "IP=%s PORT=%d RTP_PAYLOAD2=%d CONN_ID=%d", |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1323 | inet_ntoa(ip), ntohs(port), *TLVP_VAL(&tv, 0xfc), |
| 1324 | ntohs(attr_f8)); |
| 1325 | |
| 1326 | /* update our local information about this TS */ |
| 1327 | ts->abis_ip.bound_ip = ntohl(ip.s_addr); |
| 1328 | ts->abis_ip.bound_port = ntohs(port); |
Harald Welte | 8cdeaad | 2009-07-12 09:50:35 +0200 | [diff] [blame] | 1329 | ts->abis_ip.conn_id = ntohs(attr_f8); |
| 1330 | ts->abis_ip.rtp_payload2 = *TLVP_VAL(&tv, RSL_IE_IPAC_RTP_PAYLOAD2); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1331 | |
| 1332 | dispatch_signal(SS_ABISIP, S_ABISIP_BIND_ACK, msg->lchan); |
| 1333 | |
| 1334 | return 0; |
| 1335 | } |
| 1336 | |
| 1337 | static int abis_rsl_rx_ipacc_disc_ind(struct msgb *msg) |
| 1338 | { |
| 1339 | struct abis_rsl_dchan_hdr *dh = msgb_l2(msg); |
| 1340 | struct tlv_parsed tv; |
| 1341 | |
| 1342 | rsl_tlv_parse(&tv, dh->data, msgb_l2len(msg)-sizeof(*dh)); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1343 | |
Harald Welte | 26cc168 | 2009-07-28 17:58:09 +0200 | [diff] [blame^] | 1344 | if (TLVP_PRESENT(&tv, RSL_IE_CAUSE)) |
| 1345 | print_rsl_cause(TLVP_VAL(&tv, RSL_IE_CAUSE), |
| 1346 | TLVP_LEN(&tv, RSL_IE_CAUSE)); |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1347 | |
| 1348 | return 0; |
| 1349 | } |
| 1350 | |
| 1351 | static int abis_rsl_rx_ipacc(struct msgb *msg) |
| 1352 | { |
| 1353 | struct abis_rsl_rll_hdr *rllh = msgb_l2(msg); |
| 1354 | int rc = 0; |
| 1355 | |
| 1356 | msg->lchan = lchan_lookup(msg->trx, rllh->chan_nr); |
| 1357 | DEBUGP(DRSL, "channel=%s chan_nr=0x%02x ", |
| 1358 | gsm_ts_name(msg->lchan->ts), rllh->chan_nr); |
| 1359 | |
| 1360 | switch (rllh->c.msg_type) { |
| 1361 | case RSL_MT_IPAC_BIND_ACK: |
| 1362 | DEBUGPC(DRSL, "IPAC_BIND_ACK "); |
| 1363 | rc = abis_rsl_rx_ipacc_bindack(msg); |
| 1364 | break; |
| 1365 | case RSL_MT_IPAC_BIND_NACK: |
| 1366 | /* somehow the BTS was unable to bind the lchan to its local |
| 1367 | * port?!? */ |
| 1368 | DEBUGPC(DRSL, "IPAC_BIND_NACK "); |
| 1369 | break; |
| 1370 | case RSL_MT_IPAC_CONNECT_ACK: |
| 1371 | /* the BTS tells us that a connect operation was successful */ |
| 1372 | DEBUGPC(DRSL, "IPAC_CONNECT_ACK "); |
| 1373 | break; |
| 1374 | case RSL_MT_IPAC_CONNECT_NACK: |
| 1375 | /* somehow the BTS was unable to connect the lchan to a remote |
| 1376 | * port */ |
| 1377 | DEBUGPC(DRSL, "IPAC_CONNECT_NACK "); |
| 1378 | break; |
| 1379 | case RSL_MT_IPAC_DISCONNECT_IND: |
| 1380 | DEBUGPC(DRSL, "IPAC_DISCONNECT_IND "); |
| 1381 | rc = abis_rsl_rx_ipacc_disc_ind(msg); |
| 1382 | break; |
| 1383 | default: |
| 1384 | DEBUGPC(DRSL, "Unknown ip.access msg_type 0x%02x", rllh->c.msg_type); |
| 1385 | break; |
| 1386 | } |
| 1387 | DEBUGPC(DRSL, "\n"); |
| 1388 | |
| 1389 | return rc; |
| 1390 | } |
| 1391 | |
| 1392 | |
| 1393 | /* Entry-point where L2 RSL from BTS enters */ |
| 1394 | int abis_rsl_rcvmsg(struct msgb *msg) |
| 1395 | { |
| 1396 | struct abis_rsl_common_hdr *rslh = msgb_l2(msg) ; |
| 1397 | int rc = 0; |
| 1398 | |
| 1399 | switch (rslh->msg_discr & 0xfe) { |
| 1400 | case ABIS_RSL_MDISC_RLL: |
| 1401 | rc = abis_rsl_rx_rll(msg); |
| 1402 | break; |
| 1403 | case ABIS_RSL_MDISC_DED_CHAN: |
| 1404 | rc = abis_rsl_rx_dchan(msg); |
| 1405 | break; |
| 1406 | case ABIS_RSL_MDISC_COM_CHAN: |
| 1407 | rc = abis_rsl_rx_cchan(msg); |
| 1408 | break; |
| 1409 | case ABIS_RSL_MDISC_TRX: |
| 1410 | rc = abis_rsl_rx_trx(msg); |
| 1411 | break; |
| 1412 | case ABIS_RSL_MDISC_LOC: |
| 1413 | fprintf(stderr, "unimplemented RSL msg disc 0x%02x\n", |
| 1414 | rslh->msg_discr); |
| 1415 | break; |
| 1416 | case ABIS_RSL_MDISC_IPACCESS: |
| 1417 | rc = abis_rsl_rx_ipacc(msg); |
| 1418 | break; |
| 1419 | default: |
| 1420 | fprintf(stderr, "unknown RSL message discriminator 0x%02x\n", |
| 1421 | rslh->msg_discr); |
| 1422 | return -EINVAL; |
| 1423 | } |
| 1424 | msgb_free(msg); |
| 1425 | return rc; |
| 1426 | } |
| 1427 | |
| 1428 | |
Holger Hans Peter Freyther | 4e0fdfd | 2009-07-09 20:43:16 +0200 | [diff] [blame] | 1429 | /* 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] | 1430 | int rsl_ccch_conf_to_bs_cc_chans(int ccch_conf) |
| 1431 | { |
| 1432 | switch (ccch_conf) { |
| 1433 | case RSL_BCCH_CCCH_CONF_1_NC: |
| 1434 | return 1; |
| 1435 | case RSL_BCCH_CCCH_CONF_1_C: |
| 1436 | return 1; |
| 1437 | case RSL_BCCH_CCCH_CONF_2_NC: |
| 1438 | return 2; |
| 1439 | case RSL_BCCH_CCCH_CONF_3_NC: |
| 1440 | return 3; |
| 1441 | case RSL_BCCH_CCCH_CONF_4_NC: |
| 1442 | return 4; |
| 1443 | default: |
| 1444 | return -1; |
| 1445 | } |
| 1446 | } |
| 1447 | |
Holger Hans Peter Freyther | 4e0fdfd | 2009-07-09 20:43:16 +0200 | [diff] [blame] | 1448 | /* Section 3.3.2.3 TS 05.02 */ |
Harald Welte | 59b0468 | 2009-06-10 05:40:52 +0800 | [diff] [blame] | 1449 | int rsl_ccch_conf_to_bs_ccch_sdcch_comb(int ccch_conf) |
| 1450 | { |
| 1451 | switch (ccch_conf) { |
| 1452 | case RSL_BCCH_CCCH_CONF_1_NC: |
| 1453 | return 0; |
| 1454 | case RSL_BCCH_CCCH_CONF_1_C: |
| 1455 | return 1; |
| 1456 | case RSL_BCCH_CCCH_CONF_2_NC: |
| 1457 | return 0; |
| 1458 | case RSL_BCCH_CCCH_CONF_3_NC: |
| 1459 | return 0; |
| 1460 | case RSL_BCCH_CCCH_CONF_4_NC: |
| 1461 | return 0; |
| 1462 | default: |
| 1463 | return -1; |
| 1464 | } |
| 1465 | } |
| 1466 | |
| 1467 | /* From Table 10.5.33 of GSM 04.08 */ |
| 1468 | int rsl_number_of_paging_subchannels(struct gsm_bts *bts) |
| 1469 | { |
| 1470 | if (bts->chan_desc.ccch_conf == RSL_BCCH_CCCH_CONF_1_C) { |
| 1471 | return MAX(1, (3 - bts->chan_desc.bs_ag_blks_res)) |
| 1472 | * (bts->chan_desc.bs_pa_mfrms + 2); |
| 1473 | } else { |
| 1474 | return (9 - bts->chan_desc.bs_ag_blks_res) |
| 1475 | * (bts->chan_desc.bs_pa_mfrms + 2); |
| 1476 | } |
| 1477 | } |