/* 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 * * 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 #include #include #include #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; } void rsl_init_cchan_hdr(struct abis_rsl_cchan_hdr *ch, uint8_t msg_type) { ch->c.msg_discr = ABIS_RSL_MDISC_COM_CHAN; ch->c.msg_type = msg_type; ch->ie_chan = RSL_IE_CHAN_NR; } 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; } const char *rsl_chan_nr_str(uint8_t chan_nr) { static char str[20]; int ts = chan_nr & 7; uint8_t cbits = chan_nr >> 3; if (cbits == 0x01) sprintf(str, "TCH/F on TS%d", ts); else if ((cbits & 0x1e) == 0x02) sprintf(str, "TCH/H(%u) on TS%d", cbits & 0x01, ts); else if ((cbits & 0x1c) == 0x04) sprintf(str, "SDCCH/4(%u) on TS%d", cbits & 0x03, ts); else if ((cbits & 0x18) == 0x08) sprintf(str, "SDCCH/8(%u) on TS%d", cbits & 0x07, ts); else if (cbits == 0x10) sprintf(str, "BCCH on TS%d", ts); else if (cbits == 0x11) sprintf(str, "RACH on TS%d", ts); else if (cbits == 0x12) sprintf(str, "PCH/AGCH on TS%d", ts); else sprintf(str, "UNKNOWN on TS%d", ts); return str; } 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 */ void rsl_rll_push_hdr(struct msgb *msg, uint8_t msg_type, uint8_t chan_nr, uint8_t link_id, int transparent) { struct abis_rsl_rll_hdr *rh; 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; } /* 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); /* 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 */ rsl_rll_push_hdr(msg, msg_type, chan_nr, link_id, transparent); } 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; }