src/gsm/rsl.c

   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) 2008-2010 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 <stdint.h>
  25 #include <stdio.h>
  26 #include <errno.h>
  27
  28 #include <osmocom/gsm/tlv.h>
  29 #include <osmocom/gsm/rsl.h>
  30
  31 #define RSL_ALLOC_SIZE          200
  32 #define RSL_ALLOC_HEADROOM      56
  33
  34 void rsl_init_rll_hdr(struct abis_rsl_rll_hdr *dh, uint8_t msg_type)
  35 {
  36         dh->c.msg_discr = ABIS_RSL_MDISC_RLL;
  37         dh->c.msg_type = msg_type;
  38         dh->ie_chan = RSL_IE_CHAN_NR;
  39         dh->ie_link_id = RSL_IE_LINK_IDENT;
  40 }
  41
  42 void rsl_init_cchan_hdr(struct abis_rsl_cchan_hdr *ch, uint8_t msg_type)
  43 {
  44         ch->c.msg_discr = ABIS_RSL_MDISC_COM_CHAN;
  45         ch->c.msg_type = msg_type;
  46         ch->ie_chan = RSL_IE_CHAN_NR;
  47 }
  48
  49 const struct tlv_definition rsl_att_tlvdef = {
  50         .def = {
  51                 [RSL_IE_CHAN_NR]                = { TLV_TYPE_TV },
  52                 [RSL_IE_LINK_IDENT]             = { TLV_TYPE_TV },
  53                 [RSL_IE_ACT_TYPE]               = { TLV_TYPE_TV },
  54                 [RSL_IE_BS_POWER]               = { TLV_TYPE_TV },
  55                 [RSL_IE_CHAN_IDENT]             = { TLV_TYPE_TLV },
  56                 [RSL_IE_CHAN_MODE]              = { TLV_TYPE_TLV },
  57                 [RSL_IE_ENCR_INFO]              = { TLV_TYPE_TLV },
  58                 [RSL_IE_FRAME_NUMBER]           = { TLV_TYPE_FIXED, 2 },
  59                 [RSL_IE_HANDO_REF]              = { TLV_TYPE_TV },
  60                 [RSL_IE_L1_INFO]                = { TLV_TYPE_FIXED, 2 },
  61                 [RSL_IE_L3_INFO]                = { TLV_TYPE_TL16V },
  62                 [RSL_IE_MS_IDENTITY]            = { TLV_TYPE_TLV },
  63                 [RSL_IE_MS_POWER]               = { TLV_TYPE_TV },
  64                 [RSL_IE_PAGING_GROUP]           = { TLV_TYPE_TV },
  65                 [RSL_IE_PAGING_LOAD]            = { TLV_TYPE_FIXED, 2 },
  66                 [RSL_IE_PYHS_CONTEXT]           = { TLV_TYPE_TLV },
  67                 [RSL_IE_ACCESS_DELAY]           = { TLV_TYPE_TV },
  68                 [RSL_IE_RACH_LOAD]              = { TLV_TYPE_TLV },
  69                 [RSL_IE_REQ_REFERENCE]          = { TLV_TYPE_FIXED, 3 },
  70                 [RSL_IE_RELEASE_MODE]           = { TLV_TYPE_TV },
  71                 [RSL_IE_RESOURCE_INFO]          = { TLV_TYPE_TLV },
  72                 [RSL_IE_RLM_CAUSE]              = { TLV_TYPE_TLV },
  73                 [RSL_IE_STARTNG_TIME]           = { TLV_TYPE_FIXED, 2 },
  74                 [RSL_IE_TIMING_ADVANCE]         = { TLV_TYPE_TV },
  75                 [RSL_IE_UPLINK_MEAS]            = { TLV_TYPE_TLV },
  76                 [RSL_IE_CAUSE]                  = { TLV_TYPE_TLV },
  77                 [RSL_IE_MEAS_RES_NR]            = { TLV_TYPE_TV },
  78                 [RSL_IE_MSG_ID]                 = { TLV_TYPE_TV },
  79                 [RSL_IE_SYSINFO_TYPE]           = { TLV_TYPE_TV },
  80                 [RSL_IE_MS_POWER_PARAM]         = { TLV_TYPE_TLV },
  81                 [RSL_IE_BS_POWER_PARAM]         = { TLV_TYPE_TLV },
  82                 [RSL_IE_PREPROC_PARAM]          = { TLV_TYPE_TLV },
  83                 [RSL_IE_PREPROC_MEAS]           = { TLV_TYPE_TLV },
  84                 [RSL_IE_IMM_ASS_INFO]           = { TLV_TYPE_TLV },
  85                 [RSL_IE_SMSCB_INFO]             = { TLV_TYPE_FIXED, 23 },
  86                 [RSL_IE_MS_TIMING_OFFSET]       = { TLV_TYPE_TV },
  87                 [RSL_IE_ERR_MSG]                = { TLV_TYPE_TLV },
  88                 [RSL_IE_FULL_BCCH_INFO]         = { TLV_TYPE_TLV },
  89                 [RSL_IE_CHAN_NEEDED]            = { TLV_TYPE_TV },
  90                 [RSL_IE_CB_CMD_TYPE]            = { TLV_TYPE_TV },
  91                 [RSL_IE_SMSCB_MSG]              = { TLV_TYPE_TLV },
  92                 [RSL_IE_FULL_IMM_ASS_INFO]      = { TLV_TYPE_TLV },
  93                 [RSL_IE_SACCH_INFO]             = { TLV_TYPE_TLV },
  94                 [RSL_IE_CBCH_LOAD_INFO]         = { TLV_TYPE_TV },
  95                 [RSL_IE_SMSCB_CHAN_INDICATOR]   = { TLV_TYPE_TV },
  96                 [RSL_IE_GROUP_CALL_REF]         = { TLV_TYPE_TLV },
  97                 [RSL_IE_CHAN_DESC]              = { TLV_TYPE_TLV },
  98                 [RSL_IE_NCH_DRX_INFO]           = { TLV_TYPE_TLV },
  99                 [RSL_IE_CMD_INDICATOR]          = { TLV_TYPE_TLV },
 100                 [RSL_IE_EMLPP_PRIO]             = { TLV_TYPE_TV },
 101                 [RSL_IE_UIC]                    = { TLV_TYPE_TLV },
 102                 [RSL_IE_MAIN_CHAN_REF]          = { TLV_TYPE_TV },
 103                 [RSL_IE_MR_CONFIG]              = { TLV_TYPE_TLV },
 104                 [RSL_IE_MR_CONTROL]             = { TLV_TYPE_TV },
 105                 [RSL_IE_SUP_CODEC_TYPES]        = { TLV_TYPE_TLV },
 106                 [RSL_IE_CODEC_CONFIG]           = { TLV_TYPE_TLV },
 107                 [RSL_IE_RTD]                    = { TLV_TYPE_TV },
 108                 [RSL_IE_TFO_STATUS]             = { TLV_TYPE_TV },
 109                 [RSL_IE_LLP_APDU]               = { TLV_TYPE_TLV },
 110                 [RSL_IE_SIEMENS_MRPCI]          = { TLV_TYPE_TV },
 111                 [RSL_IE_IPAC_PROXY_UDP]         = { TLV_TYPE_FIXED, 2 },
 112                 [RSL_IE_IPAC_BSCMPL_TOUT]       = { TLV_TYPE_TV },
 113                 [RSL_IE_IPAC_REMOTE_IP]         = { TLV_TYPE_FIXED, 4 },
 114                 [RSL_IE_IPAC_REMOTE_PORT]       = { TLV_TYPE_FIXED, 2 },
 115                 [RSL_IE_IPAC_RTP_PAYLOAD]       = { TLV_TYPE_TV },
 116                 [RSL_IE_IPAC_LOCAL_PORT]        = { TLV_TYPE_FIXED, 2 },
 117                 [RSL_IE_IPAC_SPEECH_MODE]       = { TLV_TYPE_TV },
 118                 [RSL_IE_IPAC_LOCAL_IP]          = { TLV_TYPE_FIXED, 4 },
 119                 [RSL_IE_IPAC_CONN_ID]           = { TLV_TYPE_FIXED, 2 },
 120                 [RSL_IE_IPAC_RTP_CSD_FMT]       = { TLV_TYPE_TV },
 121                 [RSL_IE_IPAC_RTP_JIT_BUF]       = { TLV_TYPE_FIXED, 2 },
 122                 [RSL_IE_IPAC_RTP_COMPR]         = { TLV_TYPE_TV },
 123                 [RSL_IE_IPAC_RTP_PAYLOAD2]      = { TLV_TYPE_TV },
 124                 [RSL_IE_IPAC_RTP_MPLEX]         = { TLV_TYPE_FIXED, 8 },
 125                 [RSL_IE_IPAC_RTP_MPLEX_ID]      = { TLV_TYPE_TV },
 126         },
 127 };
 128
 129 /* encode channel number as per Section 9.3.1 */
 130 uint8_t rsl_enc_chan_nr(uint8_t type, uint8_t subch, uint8_t timeslot)
 131 {
 132         uint8_t ret;
 133
 134         ret = (timeslot & 0x07) | type;
 135
 136         switch (type) {
 137         case RSL_CHAN_Lm_ACCHs:
 138                 subch &= 0x01;
 139                 break;
 140         case RSL_CHAN_SDCCH4_ACCH:
 141                 subch &= 0x03;
 142                 break;
 143         case RSL_CHAN_SDCCH8_ACCH:
 144                 subch &= 0x07;
 145                 break;
 146         default:
 147                 /* no subchannels allowed */
 148                 subch = 0x00;
 149                 break;
 150         }
 151         ret |= (subch << 3);
 152
 153         return ret;
 154 }
 155
 156 int rsl_dec_chan_nr(uint8_t chan_nr, uint8_t *type, uint8_t *subch, uint8_t *timeslot)
 157 {
 158         *timeslot = chan_nr & 0x7;
 159
 160         if ((chan_nr & 0xf8) == RSL_CHAN_Bm_ACCHs) {
 161                 *type = RSL_CHAN_Bm_ACCHs;
 162                 *subch = 0;
 163         } else if ((chan_nr & 0xf0) == RSL_CHAN_Lm_ACCHs) {
 164                 *type = RSL_CHAN_Lm_ACCHs;
 165                 *subch = (chan_nr >> 3) & 0x1;
 166         } else if ((chan_nr & 0xe0) == RSL_CHAN_SDCCH4_ACCH) {
 167                 *type = RSL_CHAN_SDCCH4_ACCH;
 168                 *subch = (chan_nr >> 3) & 0x3;
 169         } else if ((chan_nr & 0xc0) == RSL_CHAN_SDCCH8_ACCH) {
 170                 *type = RSL_CHAN_SDCCH8_ACCH;
 171                 *subch = (chan_nr >> 3) & 0x7;
 172         } else if ((chan_nr & 0xf8) == RSL_CHAN_BCCH) {
 173                 *type = RSL_CHAN_BCCH;
 174                 *subch = 0;
 175         } else if ((chan_nr & 0xf8) == RSL_CHAN_RACH) {
 176                 *type = RSL_CHAN_RACH;
 177                 *subch = 0;
 178         } else if ((chan_nr & 0xf8) == RSL_CHAN_PCH_AGCH) {
 179                 *type = RSL_CHAN_PCH_AGCH;
 180                 *subch = 0;
 181         } else
 182                 return -EINVAL;
 183
 184         return 0;
 185 }
 186
 187 const char *rsl_chan_nr_str(uint8_t chan_nr)
 188 {
 189         static char str[20];
 190         int ts = chan_nr & 7;
 191         uint8_t cbits = chan_nr >> 3;
 192
 193         if (cbits == 0x01)
 194                 sprintf(str, "TCH/F on TS%d", ts);
 195         else if ((cbits & 0x1e) == 0x02)
 196                 sprintf(str, "TCH/H(%u) on TS%d", cbits & 0x01, ts);
 197         else if ((cbits & 0x1c) == 0x04)
 198                 sprintf(str, "SDCCH/4(%u) on TS%d", cbits & 0x03, ts);
 199         else if ((cbits & 0x18) == 0x08)
 200                 sprintf(str, "SDCCH/8(%u) on TS%d", cbits & 0x07, ts);
 201         else if (cbits == 0x10)
 202                 sprintf(str, "BCCH on TS%d", ts);
 203         else if (cbits == 0x11)
 204                 sprintf(str, "RACH on TS%d", ts);
 205         else if (cbits == 0x12)
 206                 sprintf(str, "PCH/AGCH on TS%d", ts);
 207         else
 208                 sprintf(str, "UNKNOWN on TS%d", ts);
 209
 210         return str;
 211 }
 212
 213 static const struct value_string rsl_err_vals[] = {
 214         { RSL_ERR_RADIO_IF_FAIL,        "Radio Interface Failure" },
 215         { RSL_ERR_RADIO_LINK_FAIL,      "Radio Link Failure" },
 216         { RSL_ERR_HANDOVER_ACC_FAIL,    "Handover Access Failure" },
 217         { RSL_ERR_TALKER_ACC_FAIL,      "Talker Access Failure" },
 218         { RSL_ERR_OM_INTERVENTION,      "O&M Intervention" },
 219         { RSL_ERR_NORMAL_UNSPEC,        "Normal event, unspecified" },
 220         { RSL_ERR_T_MSRFPCI_EXP,        "Siemens: T_MSRFPCI Expired" },
 221         { RSL_ERR_EQUIPMENT_FAIL,       "Equipment Failure" },
 222         { RSL_ERR_RR_UNAVAIL,           "Radio Resource not available" },
 223         { RSL_ERR_TERR_CH_FAIL,         "Terrestrial Channel Failure" },
 224         { RSL_ERR_CCCH_OVERLOAD,        "CCCH Overload" },
 225         { RSL_ERR_ACCH_OVERLOAD,        "ACCH Overload" },
 226         { RSL_ERR_PROCESSOR_OVERLOAD,   "Processor Overload" },
 227         { RSL_ERR_RES_UNAVAIL,          "Resource not available, unspecified" },
 228         { RSL_ERR_TRANSC_UNAVAIL,       "Transcoding not available" },
 229         { RSL_ERR_SERV_OPT_UNAVAIL,     "Service or Option not available" },
 230         { RSL_ERR_ENCR_UNIMPL,          "Encryption algorithm not implemented" },
 231         { RSL_ERR_SERV_OPT_UNIMPL,      "Service or Option not implemented" },
 232         { RSL_ERR_RCH_ALR_ACTV_ALLOC,   "Radio channel already activated" },
 233         { RSL_ERR_INVALID_MESSAGE,      "Invalid Message, unspecified" },
 234         { RSL_ERR_MSG_DISCR,            "Message Discriminator Error" },
 235         { RSL_ERR_MSG_TYPE,             "Message Type Error" },
 236         { RSL_ERR_MSG_SEQ,              "Message Sequence Error" },
 237         { RSL_ERR_IE_ERROR,             "General IE error" },
 238         { RSL_ERR_MAND_IE_ERROR,        "Mandatory IE error" },
 239         { RSL_ERR_OPT_IE_ERROR,         "Optional IE error" },
 240         { RSL_ERR_IE_NONEXIST,          "IE non-existent" },
 241         { RSL_ERR_IE_LENGTH,            "IE length error" },
 242         { RSL_ERR_IE_CONTENT,           "IE content error" },
 243         { RSL_ERR_PROTO,                "Protocol error, unspecified" },
 244         { RSL_ERR_INTERWORKING,         "Interworking error, unspecified" },
 245         { 0,                            NULL }
 246 };
 247
 248 const char *rsl_err_name(uint8_t err)
 249 {
 250         return get_value_string(rsl_err_vals, err);
 251 }
 252
 253 /* Names for Radio Link Layer Management */
 254 static const struct value_string rsl_msgt_names[] = {
 255         { RSL_MT_DATA_REQ,              "DATA_REQ" },
 256         { RSL_MT_DATA_IND,              "DATA_IND" },
 257         { RSL_MT_ERROR_IND,             "ERROR_IND" },
 258         { RSL_MT_EST_REQ,               "EST_REQ" },
 259         { RSL_MT_EST_CONF,              "EST_CONF" },
 260         { RSL_MT_EST_IND,               "EST_IND" },
 261         { RSL_MT_REL_REQ,               "REL_REQ" },
 262         { RSL_MT_REL_CONF,              "REL_CONF" },
 263         { RSL_MT_REL_IND,               "REL_IND" },
 264         { RSL_MT_UNIT_DATA_REQ,         "UNIT_DATA_REQ" },
 265         { RSL_MT_UNIT_DATA_IND,         "UNIT_DATA_IND" },
 266         { RSL_MT_SUSP_REQ,              "SUSP_REQ" },
 267         { RSL_MT_SUSP_CONF,             "SUSP_CONF" },
 268         { RSL_MT_RES_REQ,               "RES_REQ" },
 269         { RSL_MT_RECON_REQ,             "RECON_REQ" },
 270
 271         { RSL_MT_BCCH_INFO,             "BCCH_INFO" },
 272         { RSL_MT_CCCH_LOAD_IND,         "CCCH_LOAD_IND" },
 273         { RSL_MT_CHAN_RQD,              "CHAN_RQD" },
 274         { RSL_MT_DELETE_IND,            "DELETE_IND" },
 275         { RSL_MT_PAGING_CMD,            "PAGING_CMD" },
 276         { RSL_MT_IMMEDIATE_ASSIGN_CMD,  "IMM_ASS_CMD" },
 277         { RSL_MT_SMS_BC_REQ,            "SMS_BC_REQ" },
 278         { RSL_MT_CHAN_CONF,             "CHAN_CONF" },
 279
 280         { RSL_MT_RF_RES_IND,            "RF_RES_IND" },
 281         { RSL_MT_SACCH_FILL,            "SACCH_FILL" },
 282         { RSL_MT_OVERLOAD,              "OVERLOAD" },
 283         { RSL_MT_ERROR_REPORT,          "ERROR_REPORT" },
 284         { RSL_MT_SMS_BC_CMD,            "SMS_BC_CMD" },
 285         { RSL_MT_CBCH_LOAD_IND,         "CBCH_LOAD_IND" },
 286         { RSL_MT_NOT_CMD,               "NOTIFY_CMD" },
 287
 288         { RSL_MT_CHAN_ACTIV,            "CHAN_ACTIV" },
 289         { RSL_MT_CHAN_ACTIV_ACK,        "CHAN_ACTIV_ACK" },
 290         { RSL_MT_CHAN_ACTIV_NACK,       "CHAN_ACTIV_NACK" },
 291         { RSL_MT_CONN_FAIL,             "CONN_FAIL" },
 292         { RSL_MT_DEACTIVATE_SACCH,      "DEACTIVATE_SACCH" },
 293         { RSL_MT_ENCR_CMD,              "ENCR_CMD" },
 294         { RSL_MT_HANDO_DET,             "HANDOVER_DETECT" },
 295         { RSL_MT_MEAS_RES,              "MEAS_RES" },
 296         { RSL_MT_MODE_MODIFY_REQ,       "MODE_MODIFY_REQ" },
 297         { RSL_MT_MODE_MODIFY_ACK,       "MODE_MODIFY_ACK" },
 298         { RSL_MT_MODE_MODIFY_NACK,      "MODE_MODIFY_NACK" },
 299         { RSL_MT_PHY_CONTEXT_REQ,       "PHY_CONTEXT_REQ" },
 300         { RSL_MT_PHY_CONTEXT_CONF,      "PHY_CONTEXT_CONF" },
 301         { RSL_MT_RF_CHAN_REL,           "RF_CHAN_REL" },
 302         { RSL_MT_MS_POWER_CONTROL,      "MS_POWER_CONTROL" },
 303         { RSL_MT_BS_POWER_CONTROL,      "BS_POWER_CONTROL" },
 304         { RSL_MT_PREPROC_CONFIG,        "PREPROC_CONFIG" },
 305         { RSL_MT_PREPROC_MEAS_RES,      "PREPROC_MEAS_RES" },
 306         { RSL_MT_RF_CHAN_REL_ACK,       "RF_CHAN_REL_ACK" },
 307         { RSL_MT_SACCH_INFO_MODIFY,     "SACCH_INFO_MODIFY" },
 308         { RSL_MT_TALKER_DET,            "TALKER_DETECT" },
 309         { RSL_MT_LISTENER_DET,          "LISTENER_DETECT" },
 310         { RSL_MT_REMOTE_CODEC_CONF_REP, "REM_CODEC_CONF_REP" },
 311         { RSL_MT_RTD_REP,               "RTD_REQ" },
 312         { RSL_MT_PRE_HANDO_NOTIF,       "HANDO_NOTIF" },
 313         { RSL_MT_MR_CODEC_MOD_REQ,      "CODEC_MOD_REQ" },
 314         { RSL_MT_MR_CODEC_MOD_ACK,      "CODEC_MOD_ACK" },
 315         { RSL_MT_MR_CODEC_MOD_NACK,     "CODEC_MOD_NACK" },
 316         { RSL_MT_MR_CODEC_MOD_PER,      "CODEC_MODE_PER" },
 317         { RSL_MT_TFO_REP,               "TFO_REP" },
 318         { RSL_MT_TFO_MOD_REQ,           "TFO_MOD_REQ" },
 319         { RSL_MT_LOCATION_INFO,         "LOCATION_INFO" },
 320         { 0,                            NULL }
 321 };
 322
 323
 324 const char *rsl_msg_name(uint8_t msg_type)
 325 {
 326         return get_value_string(rsl_msgt_names, msg_type);
 327 }
 328
 329 static const struct value_string rsl_rlm_cause_strs[] = {
 330         { RLL_CAUSE_T200_EXPIRED,       "Timer T200 expired (N200+1) times" },
 331         { RLL_CAUSE_REEST_REQ,          "Re-establishment request" },
 332         { RLL_CAUSE_UNSOL_UA_RESP,      "Unsolicited UA response" },
 333         { RLL_CAUSE_UNSOL_DM_RESP,      "Unsolicited DM response" },
 334         { RLL_CAUSE_UNSOL_DM_RESP_MF,   "Unsolicited DM response, multiple frame" },
 335         { RLL_CAUSE_UNSOL_SPRV_RESP,    "Unsolicited supervisory response" },
 336         { RLL_CAUSE_SEQ_ERR,            "Sequence Error" },
 337         { RLL_CAUSE_UFRM_INC_PARAM,     "U-Frame with incorrect parameters" },
 338         { RLL_CAUSE_SFRM_INC_PARAM,     "S-Frame with incorrect parameters" },
 339         { RLL_CAUSE_IFRM_INC_MBITS,     "I-Frame with incorrect use of M bit" },
 340         { RLL_CAUSE_IFRM_INC_LEN,       "I-Frame with incorrect length" },
 341         { RLL_CAUSE_FRM_UNIMPL,         "Fraeme not implemented" },
 342         { RLL_CAUSE_SABM_MF,            "SABM command, multiple frame established state" },
 343         { RLL_CAUSE_SABM_INFO_NOTALL,   "SABM frame with information not allowed in this state" },
 344         { 0,                            NULL },
 345 };
 346
 347 const char *rsl_rlm_cause_name(uint8_t err)
 348 {
 349         return get_value_string(rsl_rlm_cause_strs, err);
 350 }
 351
 352 /* Section 3.3.2.3 TS 05.02. I think this looks like a table */
 353 int rsl_ccch_conf_to_bs_cc_chans(int ccch_conf)
 354 {
 355         switch (ccch_conf) {
 356         case RSL_BCCH_CCCH_CONF_1_NC:
 357                 return 1;
 358         case RSL_BCCH_CCCH_CONF_1_C:
 359                 return 1;
 360         case RSL_BCCH_CCCH_CONF_2_NC:
 361                 return 2;
 362         case RSL_BCCH_CCCH_CONF_3_NC:
 363                 return 3;
 364         case RSL_BCCH_CCCH_CONF_4_NC:
 365                 return 4;
 366         default:
 367                 return -1;
 368         }
 369 }
 370
 371 /* Section 3.3.2.3 TS 05.02 */
 372 int rsl_ccch_conf_to_bs_ccch_sdcch_comb(int ccch_conf)
 373 {
 374         switch (ccch_conf) {
 375         case RSL_BCCH_CCCH_CONF_1_NC:
 376                 return 0;
 377         case RSL_BCCH_CCCH_CONF_1_C:
 378                 return 1;
 379         case RSL_BCCH_CCCH_CONF_2_NC:
 380                 return 0;
 381         case RSL_BCCH_CCCH_CONF_3_NC:
 382                 return 0;
 383         case RSL_BCCH_CCCH_CONF_4_NC:
 384                 return 0;
 385         default:
 386                 return -1;
 387         }
 388 }
 389
 390 /* Push a RSL RLL header */
 391 void rsl_rll_push_hdr(struct msgb *msg, uint8_t msg_type, uint8_t chan_nr,
 392                       uint8_t link_id, int transparent)
 393 {
 394         struct abis_rsl_rll_hdr *rh;
 395
 396         rh = (struct abis_rsl_rll_hdr *) msgb_push(msg, sizeof(*rh));
 397         rsl_init_rll_hdr(rh, msg_type);
 398         if (transparent)
 399                 rh->c.msg_discr |= ABIS_RSL_MDISC_TRANSP;
 400         rh->chan_nr = chan_nr;
 401         rh->link_id = link_id;
 402
 403         /* set the l2 header pointer */
 404         msg->l2h = (uint8_t *)rh;
 405 }
 406
 407 /* Push a RSL RLL header with L3_INFO IE */
 408 void rsl_rll_push_l3(struct msgb *msg, uint8_t msg_type, uint8_t chan_nr,
 409                      uint8_t link_id, int transparent)
 410 {
 411         uint8_t l3_len = msg->tail - (uint8_t *)msgb_l3(msg);
 412
 413         /* construct a RSLms RLL message (DATA INDICATION, UNIT DATA
 414          * INDICATION) and send it off via RSLms */
 415
 416         /* Push the L3 IE tag and lengh */
 417         msgb_tv16_push(msg, RSL_IE_L3_INFO, l3_len);
 418
 419         /* Then push the RSL header */
 420         rsl_rll_push_hdr(msg, msg_type, chan_nr, link_id, transparent);
 421 }
 422
 423 struct msgb *rsl_rll_simple(uint8_t msg_type, uint8_t chan_nr,
 424                             uint8_t link_id, int transparent)
 425 {
 426         struct abis_rsl_rll_hdr *rh;
 427         struct msgb *msg;
 428
 429         msg = msgb_alloc_headroom(RSL_ALLOC_SIZE+RSL_ALLOC_HEADROOM,
 430                                   RSL_ALLOC_HEADROOM, "rsl_rll_simple");
 431
 432         if (!msg)
 433                 return NULL;
 434
 435         /* put the RSL header */
 436         rh = (struct abis_rsl_rll_hdr *) msgb_put(msg, sizeof(*rh));
 437         rsl_init_rll_hdr(rh, msg_type);
 438         if (transparent)
 439                 rh->c.msg_discr |= ABIS_RSL_MDISC_TRANSP;
 440         rh->chan_nr = chan_nr;
 441         rh->link_id = link_id;
 442
 443         /* set the l2 header pointer */
 444         msg->l2h = (uint8_t *)rh;
 445
 446         return msg;
 447 }