| /* GSM Radio Signalling Link messages on the A-bis interface |
| * 3GPP TS 08.58 version 8.6.0 Release 1999 / ETSI TS 100 596 V8.6.0 */ |
| |
| /* (C) 2008-2010 by Harald Welte <laforge@gnumonks.org> |
| * |
| * All Rights Reserved |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write to the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| */ |
| |
| #include <stdint.h> |
| #include <errno.h> |
| |
| #include <osmocore/tlv.h> |
| #include <osmocore/rsl.h> |
| |
| #define RSL_ALLOC_SIZE 200 |
| #define RSL_ALLOC_HEADROOM 56 |
| |
| void rsl_init_rll_hdr(struct abis_rsl_rll_hdr *dh, uint8_t msg_type) |
| { |
| dh->c.msg_discr = ABIS_RSL_MDISC_RLL; |
| dh->c.msg_type = msg_type; |
| dh->ie_chan = RSL_IE_CHAN_NR; |
| dh->ie_link_id = RSL_IE_LINK_IDENT; |
| } |
| |
| const struct tlv_definition rsl_att_tlvdef = { |
| .def = { |
| [RSL_IE_CHAN_NR] = { TLV_TYPE_TV }, |
| [RSL_IE_LINK_IDENT] = { TLV_TYPE_TV }, |
| [RSL_IE_ACT_TYPE] = { TLV_TYPE_TV }, |
| [RSL_IE_BS_POWER] = { TLV_TYPE_TV }, |
| [RSL_IE_CHAN_IDENT] = { TLV_TYPE_TLV }, |
| [RSL_IE_CHAN_MODE] = { TLV_TYPE_TLV }, |
| [RSL_IE_ENCR_INFO] = { TLV_TYPE_TLV }, |
| [RSL_IE_FRAME_NUMBER] = { TLV_TYPE_FIXED, 2 }, |
| [RSL_IE_HANDO_REF] = { TLV_TYPE_TV }, |
| [RSL_IE_L1_INFO] = { TLV_TYPE_FIXED, 2 }, |
| [RSL_IE_L3_INFO] = { TLV_TYPE_TL16V }, |
| [RSL_IE_MS_IDENTITY] = { TLV_TYPE_TLV }, |
| [RSL_IE_MS_POWER] = { TLV_TYPE_TV }, |
| [RSL_IE_PAGING_GROUP] = { TLV_TYPE_TV }, |
| [RSL_IE_PAGING_LOAD] = { TLV_TYPE_FIXED, 2 }, |
| [RSL_IE_PYHS_CONTEXT] = { TLV_TYPE_TLV }, |
| [RSL_IE_ACCESS_DELAY] = { TLV_TYPE_TV }, |
| [RSL_IE_RACH_LOAD] = { TLV_TYPE_TLV }, |
| [RSL_IE_REQ_REFERENCE] = { TLV_TYPE_FIXED, 3 }, |
| [RSL_IE_RELEASE_MODE] = { TLV_TYPE_TV }, |
| [RSL_IE_RESOURCE_INFO] = { TLV_TYPE_TLV }, |
| [RSL_IE_RLM_CAUSE] = { TLV_TYPE_TLV }, |
| [RSL_IE_STARTNG_TIME] = { TLV_TYPE_FIXED, 2 }, |
| [RSL_IE_TIMING_ADVANCE] = { TLV_TYPE_TV }, |
| [RSL_IE_UPLINK_MEAS] = { TLV_TYPE_TLV }, |
| [RSL_IE_CAUSE] = { TLV_TYPE_TLV }, |
| [RSL_IE_MEAS_RES_NR] = { TLV_TYPE_TV }, |
| [RSL_IE_MSG_ID] = { TLV_TYPE_TV }, |
| [RSL_IE_SYSINFO_TYPE] = { TLV_TYPE_TV }, |
| [RSL_IE_MS_POWER_PARAM] = { TLV_TYPE_TLV }, |
| [RSL_IE_BS_POWER_PARAM] = { TLV_TYPE_TLV }, |
| [RSL_IE_PREPROC_PARAM] = { TLV_TYPE_TLV }, |
| [RSL_IE_PREPROC_MEAS] = { TLV_TYPE_TLV }, |
| [RSL_IE_IMM_ASS_INFO] = { TLV_TYPE_TLV }, |
| [RSL_IE_SMSCB_INFO] = { TLV_TYPE_FIXED, 23 }, |
| [RSL_IE_MS_TIMING_OFFSET] = { TLV_TYPE_TV }, |
| [RSL_IE_ERR_MSG] = { TLV_TYPE_TLV }, |
| [RSL_IE_FULL_BCCH_INFO] = { TLV_TYPE_TLV }, |
| [RSL_IE_CHAN_NEEDED] = { TLV_TYPE_TV }, |
| [RSL_IE_CB_CMD_TYPE] = { TLV_TYPE_TV }, |
| [RSL_IE_SMSCB_MSG] = { TLV_TYPE_TLV }, |
| [RSL_IE_FULL_IMM_ASS_INFO] = { TLV_TYPE_TLV }, |
| [RSL_IE_SACCH_INFO] = { TLV_TYPE_TLV }, |
| [RSL_IE_CBCH_LOAD_INFO] = { TLV_TYPE_TV }, |
| [RSL_IE_SMSCB_CHAN_INDICATOR] = { TLV_TYPE_TV }, |
| [RSL_IE_GROUP_CALL_REF] = { TLV_TYPE_TLV }, |
| [RSL_IE_CHAN_DESC] = { TLV_TYPE_TLV }, |
| [RSL_IE_NCH_DRX_INFO] = { TLV_TYPE_TLV }, |
| [RSL_IE_CMD_INDICATOR] = { TLV_TYPE_TLV }, |
| [RSL_IE_EMLPP_PRIO] = { TLV_TYPE_TV }, |
| [RSL_IE_UIC] = { TLV_TYPE_TLV }, |
| [RSL_IE_MAIN_CHAN_REF] = { TLV_TYPE_TV }, |
| [RSL_IE_MR_CONFIG] = { TLV_TYPE_TLV }, |
| [RSL_IE_MR_CONTROL] = { TLV_TYPE_TV }, |
| [RSL_IE_SUP_CODEC_TYPES] = { TLV_TYPE_TLV }, |
| [RSL_IE_CODEC_CONFIG] = { TLV_TYPE_TLV }, |
| [RSL_IE_RTD] = { TLV_TYPE_TV }, |
| [RSL_IE_TFO_STATUS] = { TLV_TYPE_TV }, |
| [RSL_IE_LLP_APDU] = { TLV_TYPE_TLV }, |
| [RSL_IE_SIEMENS_MRPCI] = { TLV_TYPE_TV }, |
| [RSL_IE_IPAC_PROXY_UDP] = { TLV_TYPE_FIXED, 2 }, |
| [RSL_IE_IPAC_BSCMPL_TOUT] = { TLV_TYPE_TV }, |
| [RSL_IE_IPAC_REMOTE_IP] = { TLV_TYPE_FIXED, 4 }, |
| [RSL_IE_IPAC_REMOTE_PORT] = { TLV_TYPE_FIXED, 2 }, |
| [RSL_IE_IPAC_RTP_PAYLOAD] = { TLV_TYPE_TV }, |
| [RSL_IE_IPAC_LOCAL_PORT] = { TLV_TYPE_FIXED, 2 }, |
| [RSL_IE_IPAC_SPEECH_MODE] = { TLV_TYPE_TV }, |
| [RSL_IE_IPAC_LOCAL_IP] = { TLV_TYPE_FIXED, 4 }, |
| [RSL_IE_IPAC_CONN_ID] = { TLV_TYPE_FIXED, 2 }, |
| [RSL_IE_IPAC_RTP_CSD_FMT] = { TLV_TYPE_TV }, |
| [RSL_IE_IPAC_RTP_JIT_BUF] = { TLV_TYPE_FIXED, 2 }, |
| [RSL_IE_IPAC_RTP_COMPR] = { TLV_TYPE_TV }, |
| [RSL_IE_IPAC_RTP_PAYLOAD2] = { TLV_TYPE_TV }, |
| [RSL_IE_IPAC_RTP_MPLEX] = { TLV_TYPE_FIXED, 8 }, |
| [RSL_IE_IPAC_RTP_MPLEX_ID] = { TLV_TYPE_TV }, |
| }, |
| }; |
| |
| /* encode channel number as per Section 9.3.1 */ |
| uint8_t rsl_enc_chan_nr(uint8_t type, uint8_t subch, uint8_t timeslot) |
| { |
| uint8_t ret; |
| |
| ret = (timeslot & 0x07) | type; |
| |
| switch (type) { |
| case RSL_CHAN_Lm_ACCHs: |
| subch &= 0x01; |
| break; |
| case RSL_CHAN_SDCCH4_ACCH: |
| subch &= 0x03; |
| break; |
| case RSL_CHAN_SDCCH8_ACCH: |
| subch &= 0x07; |
| break; |
| default: |
| /* no subchannels allowed */ |
| subch = 0x00; |
| break; |
| } |
| ret |= (subch << 3); |
| |
| return ret; |
| } |
| |
| int rsl_dec_chan_nr(uint8_t chan_nr, uint8_t *type, uint8_t *subch, uint8_t *timeslot) |
| { |
| *timeslot = chan_nr & 0x7; |
| |
| if ((chan_nr & 0xf8) == RSL_CHAN_Bm_ACCHs) { |
| *type = RSL_CHAN_Bm_ACCHs; |
| *subch = 0; |
| } else if ((chan_nr & 0xf0) == RSL_CHAN_Lm_ACCHs) { |
| *type = RSL_CHAN_Lm_ACCHs; |
| *subch = (chan_nr >> 3) & 0x1; |
| } else if ((chan_nr & 0xe0) == RSL_CHAN_SDCCH4_ACCH) { |
| *type = RSL_CHAN_SDCCH4_ACCH; |
| *subch = (chan_nr >> 3) & 0x3; |
| } else if ((chan_nr & 0xc0) == RSL_CHAN_SDCCH8_ACCH) { |
| *type = RSL_CHAN_SDCCH8_ACCH; |
| *subch = (chan_nr >> 3) & 0x7; |
| } else if ((chan_nr & 0xf8) == RSL_CHAN_BCCH) { |
| *type = RSL_CHAN_BCCH; |
| *subch = 0; |
| } else if ((chan_nr & 0xf8) == RSL_CHAN_RACH) { |
| *type = RSL_CHAN_RACH; |
| *subch = 0; |
| } else if ((chan_nr & 0xf8) == RSL_CHAN_PCH_AGCH) { |
| *type = RSL_CHAN_PCH_AGCH; |
| *subch = 0; |
| } else |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| static const struct value_string rsl_err_vals[] = { |
| { RSL_ERR_RADIO_IF_FAIL, "Radio Interface Failure" }, |
| { RSL_ERR_RADIO_LINK_FAIL, "Radio Link Failure" }, |
| { RSL_ERR_HANDOVER_ACC_FAIL, "Handover Access Failure" }, |
| { RSL_ERR_TALKER_ACC_FAIL, "Talker Access Failure" }, |
| { RSL_ERR_OM_INTERVENTION, "O&M Intervention" }, |
| { RSL_ERR_NORMAL_UNSPEC, "Normal event, unspecified" }, |
| { RSL_ERR_T_MSRFPCI_EXP, "Siemens: T_MSRFPCI Expired" }, |
| { RSL_ERR_EQUIPMENT_FAIL, "Equipment Failure" }, |
| { RSL_ERR_RR_UNAVAIL, "Radio Resource not available" }, |
| { RSL_ERR_TERR_CH_FAIL, "Terrestrial Channel Failure" }, |
| { RSL_ERR_CCCH_OVERLOAD, "CCCH Overload" }, |
| { RSL_ERR_ACCH_OVERLOAD, "ACCH Overload" }, |
| { RSL_ERR_PROCESSOR_OVERLOAD, "Processor Overload" }, |
| { RSL_ERR_RES_UNAVAIL, "Resource not available, unspecified" }, |
| { RSL_ERR_TRANSC_UNAVAIL, "Transcoding not available" }, |
| { RSL_ERR_SERV_OPT_UNAVAIL, "Service or Option not available" }, |
| { RSL_ERR_ENCR_UNIMPL, "Encryption algorithm not implemented" }, |
| { RSL_ERR_SERV_OPT_UNIMPL, "Service or Option not implemented" }, |
| { RSL_ERR_RCH_ALR_ACTV_ALLOC, "Radio channel already activated" }, |
| { RSL_ERR_INVALID_MESSAGE, "Invalid Message, unspecified" }, |
| { RSL_ERR_MSG_DISCR, "Message Discriminator Error" }, |
| { RSL_ERR_MSG_TYPE, "Message Type Error" }, |
| { RSL_ERR_MSG_SEQ, "Message Sequence Error" }, |
| { RSL_ERR_IE_ERROR, "General IE error" }, |
| { RSL_ERR_MAND_IE_ERROR, "Mandatory IE error" }, |
| { RSL_ERR_OPT_IE_ERROR, "Optional IE error" }, |
| { RSL_ERR_IE_NONEXIST, "IE non-existent" }, |
| { RSL_ERR_IE_LENGTH, "IE length error" }, |
| { RSL_ERR_IE_CONTENT, "IE content error" }, |
| { RSL_ERR_PROTO, "Protocol error, unspecified" }, |
| { RSL_ERR_INTERWORKING, "Interworking error, unspecified" }, |
| { 0, NULL } |
| }; |
| |
| const char *rsl_err_name(uint8_t err) |
| { |
| return get_value_string(rsl_err_vals, err); |
| } |
| |
| static const struct value_string rsl_rlm_cause_strs[] = { |
| { RLL_CAUSE_T200_EXPIRED, "Timer T200 expired (N200+1) times" }, |
| { RLL_CAUSE_REEST_REQ, "Re-establishment request" }, |
| { RLL_CAUSE_UNSOL_UA_RESP, "Unsolicited UA response" }, |
| { RLL_CAUSE_UNSOL_DM_RESP, "Unsolicited DM response" }, |
| { RLL_CAUSE_UNSOL_DM_RESP_MF, "Unsolicited DM response, multiple frame" }, |
| { RLL_CAUSE_UNSOL_SPRV_RESP, "Unsolicited supervisory response" }, |
| { RLL_CAUSE_SEQ_ERR, "Sequence Error" }, |
| { RLL_CAUSE_UFRM_INC_PARAM, "U-Frame with incorrect parameters" }, |
| { RLL_CAUSE_SFRM_INC_PARAM, "S-Frame with incorrect parameters" }, |
| { RLL_CAUSE_IFRM_INC_MBITS, "I-Frame with incorrect use of M bit" }, |
| { RLL_CAUSE_IFRM_INC_LEN, "I-Frame with incorrect length" }, |
| { RLL_CAUSE_FRM_UNIMPL, "Fraeme not implemented" }, |
| { RLL_CAUSE_SABM_MF, "SABM command, multiple frame established state" }, |
| { RLL_CAUSE_SABM_INFO_NOTALL, "SABM frame with information not allowed in this state" }, |
| { 0, NULL }, |
| }; |
| |
| const char *rsl_rlm_cause_name(uint8_t err) |
| { |
| return get_value_string(rsl_rlm_cause_strs, err); |
| } |
| |
| /* Section 3.3.2.3 TS 05.02. I think this looks like a table */ |
| int rsl_ccch_conf_to_bs_cc_chans(int ccch_conf) |
| { |
| switch (ccch_conf) { |
| case RSL_BCCH_CCCH_CONF_1_NC: |
| return 1; |
| case RSL_BCCH_CCCH_CONF_1_C: |
| return 1; |
| case RSL_BCCH_CCCH_CONF_2_NC: |
| return 2; |
| case RSL_BCCH_CCCH_CONF_3_NC: |
| return 3; |
| case RSL_BCCH_CCCH_CONF_4_NC: |
| return 4; |
| default: |
| return -1; |
| } |
| } |
| |
| /* Section 3.3.2.3 TS 05.02 */ |
| int rsl_ccch_conf_to_bs_ccch_sdcch_comb(int ccch_conf) |
| { |
| switch (ccch_conf) { |
| case RSL_BCCH_CCCH_CONF_1_NC: |
| return 0; |
| case RSL_BCCH_CCCH_CONF_1_C: |
| return 1; |
| case RSL_BCCH_CCCH_CONF_2_NC: |
| return 0; |
| case RSL_BCCH_CCCH_CONF_3_NC: |
| return 0; |
| case RSL_BCCH_CCCH_CONF_4_NC: |
| return 0; |
| default: |
| return -1; |
| } |
| } |
| |
| /* Push a RSL RLL header with L3_INFO IE */ |
| void rsl_rll_push_l3(struct msgb *msg, uint8_t msg_type, uint8_t chan_nr, |
| uint8_t link_id, int transparent) |
| { |
| uint8_t l3_len = msg->tail - (uint8_t *)msgb_l3(msg); |
| struct abis_rsl_rll_hdr *rh; |
| |
| /* construct a RSLms RLL message (DATA INDICATION, UNIT DATA |
| * INDICATION) and send it off via RSLms */ |
| |
| /* Push the L3 IE tag and lengh */ |
| msgb_tv16_push(msg, RSL_IE_L3_INFO, l3_len); |
| |
| /* Then push the RSL header */ |
| rh = (struct abis_rsl_rll_hdr *) msgb_push(msg, sizeof(*rh)); |
| rsl_init_rll_hdr(rh, msg_type); |
| if (transparent) |
| rh->c.msg_discr |= ABIS_RSL_MDISC_TRANSP; |
| rh->chan_nr = chan_nr; |
| rh->link_id = link_id; |
| |
| /* set the l2 header pointer */ |
| msg->l2h = (uint8_t *)rh; |
| } |
| |
| struct msgb *rsl_rll_simple(uint8_t msg_type, uint8_t chan_nr, |
| uint8_t link_id, int transparent) |
| { |
| struct abis_rsl_rll_hdr *rh; |
| struct msgb *msg; |
| |
| msg = msgb_alloc_headroom(RSL_ALLOC_SIZE+RSL_ALLOC_HEADROOM, |
| RSL_ALLOC_HEADROOM, "rsl_rll_simple"); |
| |
| if (!msg) |
| return NULL; |
| |
| /* put the RSL header */ |
| rh = (struct abis_rsl_rll_hdr *) msgb_put(msg, sizeof(*rh)); |
| rsl_init_rll_hdr(rh, msg_type); |
| if (transparent) |
| rh->c.msg_discr |= ABIS_RSL_MDISC_TRANSP; |
| rh->chan_nr = chan_nr; |
| rh->link_id = link_id; |
| |
| /* set the l2 header pointer */ |
| msg->l2h = (uint8_t *)rh; |
| |
| return msg; |
| } |