mirror of https://gerrit.osmocom.org/libosmocore
416 lines
13 KiB
C
416 lines
13 KiB
C
/* GSM Mobile Radio Interface Layer 3 messages
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* 3GPP TS 04.08 version 7.21.0 Release 1998 / ETSI TS 100 940 V7.21.0 */
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/* (C) 2008-2010 by Harald Welte <laforge@gnumonks.org>
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* (C) 2008, 2009 by Holger Hans Peter Freyther <zecke@selfish.org>
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*
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include <arpa/inet.h>
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#include <osmocore/utils.h>
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#include <osmocore/tlv.h>
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#include <osmocore/gsm48.h>
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#include <osmocore/protocol/gsm_04_08.h>
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const struct tlv_definition gsm48_att_tlvdef = {
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.def = {
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[GSM48_IE_MOBILE_ID] = { TLV_TYPE_TLV },
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[GSM48_IE_NAME_LONG] = { TLV_TYPE_TLV },
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[GSM48_IE_NAME_SHORT] = { TLV_TYPE_TLV },
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[GSM48_IE_UTC] = { TLV_TYPE_TV },
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[GSM48_IE_NET_TIME_TZ] = { TLV_TYPE_FIXED, 7 },
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[GSM48_IE_LSA_IDENT] = { TLV_TYPE_TLV },
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[GSM48_IE_BEARER_CAP] = { TLV_TYPE_TLV },
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[GSM48_IE_CAUSE] = { TLV_TYPE_TLV },
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[GSM48_IE_CC_CAP] = { TLV_TYPE_TLV },
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[GSM48_IE_ALERT] = { TLV_TYPE_TLV },
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[GSM48_IE_FACILITY] = { TLV_TYPE_TLV },
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[GSM48_IE_PROGR_IND] = { TLV_TYPE_TLV },
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[GSM48_IE_AUX_STATUS] = { TLV_TYPE_TLV },
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[GSM48_IE_NOTIFY] = { TLV_TYPE_TV },
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[GSM48_IE_KPD_FACILITY] = { TLV_TYPE_TV },
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[GSM48_IE_SIGNAL] = { TLV_TYPE_TV },
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[GSM48_IE_CONN_BCD] = { TLV_TYPE_TLV },
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[GSM48_IE_CONN_SUB] = { TLV_TYPE_TLV },
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[GSM48_IE_CALLING_BCD] = { TLV_TYPE_TLV },
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[GSM48_IE_CALLING_SUB] = { TLV_TYPE_TLV },
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[GSM48_IE_CALLED_BCD] = { TLV_TYPE_TLV },
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[GSM48_IE_CALLED_SUB] = { TLV_TYPE_TLV },
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[GSM48_IE_REDIR_BCD] = { TLV_TYPE_TLV },
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[GSM48_IE_REDIR_SUB] = { TLV_TYPE_TLV },
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[GSM48_IE_LOWL_COMPAT] = { TLV_TYPE_TLV },
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[GSM48_IE_HIGHL_COMPAT] = { TLV_TYPE_TLV },
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[GSM48_IE_USER_USER] = { TLV_TYPE_TLV },
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[GSM48_IE_SS_VERS] = { TLV_TYPE_TLV },
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[GSM48_IE_MORE_DATA] = { TLV_TYPE_T },
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[GSM48_IE_CLIR_SUPP] = { TLV_TYPE_T },
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[GSM48_IE_CLIR_INVOC] = { TLV_TYPE_T },
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[GSM48_IE_REV_C_SETUP] = { TLV_TYPE_T },
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[GSM48_IE_REPEAT_CIR] = { TLV_TYPE_T },
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[GSM48_IE_REPEAT_SEQ] = { TLV_TYPE_T },
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/* FIXME: more elements */
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},
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};
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/* RR elements */
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const struct tlv_definition gsm48_rr_att_tlvdef = {
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.def = {
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/* NOTE: Don't add IE 17 = MOBILE_ID here, it already used. */
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[GSM48_IE_VGCS_TARGET] = { TLV_TYPE_TLV },
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[GSM48_IE_FRQSHORT_AFTER] = { TLV_TYPE_FIXED, 9 },
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[GSM48_IE_MUL_RATE_CFG] = { TLV_TYPE_TLV },
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[GSM48_IE_FREQ_L_AFTER] = { TLV_TYPE_TLV },
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[GSM48_IE_MSLOT_DESC] = { TLV_TYPE_TLV },
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[GSM48_IE_CHANMODE_2] = { TLV_TYPE_TV },
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[GSM48_IE_FRQSHORT_BEFORE] = { TLV_TYPE_FIXED, 9 },
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[GSM48_IE_CHANMODE_3] = { TLV_TYPE_TV },
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[GSM48_IE_CHANMODE_4] = { TLV_TYPE_TV },
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[GSM48_IE_CHANMODE_5] = { TLV_TYPE_TV },
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[GSM48_IE_CHANMODE_6] = { TLV_TYPE_TV },
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[GSM48_IE_CHANMODE_7] = { TLV_TYPE_TV },
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[GSM48_IE_CHANMODE_8] = { TLV_TYPE_TV },
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[GSM48_IE_FREQ_L_BEFORE] = { TLV_TYPE_TLV },
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[GSM48_IE_CH_DESC_1_BEFORE] = { TLV_TYPE_FIXED, 3 },
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[GSM48_IE_CH_DESC_2_BEFORE] = { TLV_TYPE_FIXED, 3 },
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[GSM48_IE_F_CH_SEQ_BEFORE] = { TLV_TYPE_FIXED, 9 },
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[GSM48_IE_CLASSMARK3] = { TLV_TYPE_TLV },
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[GSM48_IE_MA_BEFORE] = { TLV_TYPE_TLV },
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[GSM48_IE_RR_PACKET_UL] = { TLV_TYPE_TLV },
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[GSM48_IE_RR_PACKET_DL] = { TLV_TYPE_TLV },
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[GSM48_IE_CELL_CH_DESC] = { TLV_TYPE_FIXED, 16 },
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[GSM48_IE_CHANMODE_1] = { TLV_TYPE_TV },
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[GSM48_IE_CHDES_2_AFTER] = { TLV_TYPE_FIXED, 3 },
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[GSM48_IE_MODE_SEC_CH] = { TLV_TYPE_TV },
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[GSM48_IE_F_CH_SEQ_AFTER] = { TLV_TYPE_FIXED, 9 },
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[GSM48_IE_MA_AFTER] = { TLV_TYPE_TLV },
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[GSM48_IE_BA_RANGE] = { TLV_TYPE_TLV },
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[GSM48_IE_GROUP_CHDES] = { TLV_TYPE_TLV },
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[GSM48_IE_BA_LIST_PREF] = { TLV_TYPE_TLV },
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[GSM48_IE_MOB_OVSERV_DIF] = { TLV_TYPE_TLV },
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[GSM48_IE_REALTIME_DIFF] = { TLV_TYPE_TLV },
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[GSM48_IE_START_TIME] = { TLV_TYPE_FIXED, 2 },
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[GSM48_IE_TIMING_ADVANCE] = { TLV_TYPE_TV },
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[GSM48_IE_GROUP_CIP_SEQ] = { TLV_TYPE_SINGLE_TV },
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[GSM48_IE_CIP_MODE_SET] = { TLV_TYPE_SINGLE_TV },
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[GSM48_IE_GPRS_RESUMPT] = { TLV_TYPE_SINGLE_TV },
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[GSM48_IE_SYNC_IND] = { TLV_TYPE_SINGLE_TV },
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},
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};
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/* MM elements */
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const struct tlv_definition gsm48_mm_att_tlvdef = {
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.def = {
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[GSM48_IE_MOBILE_ID] = { TLV_TYPE_TLV },
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[GSM48_IE_NAME_LONG] = { TLV_TYPE_TLV },
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[GSM48_IE_NAME_SHORT] = { TLV_TYPE_TLV },
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[GSM48_IE_UTC] = { TLV_TYPE_TV },
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[GSM48_IE_NET_TIME_TZ] = { TLV_TYPE_FIXED, 7 },
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[GSM48_IE_LSA_IDENT] = { TLV_TYPE_TLV },
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[GSM48_IE_LOCATION_AREA] = { TLV_TYPE_FIXED, 5 },
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[GSM48_IE_PRIORITY_LEV] = { TLV_TYPE_SINGLE_TV },
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[GSM48_IE_FOLLOW_ON_PROC] = { TLV_TYPE_T },
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[GSM48_IE_CTS_PERMISSION] = { TLV_TYPE_T },
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},
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};
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static const struct value_string rr_cause_names[] = {
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{ GSM48_RR_CAUSE_NORMAL, "Normal event" },
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{ GSM48_RR_CAUSE_ABNORMAL_UNSPEC, "Abnormal release, unspecified" },
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{ GSM48_RR_CAUSE_ABNORMAL_UNACCT, "Abnormal release, channel unacceptable" },
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{ GSM48_RR_CAUSE_ABNORMAL_TIMER, "Abnormal release, timer expired" },
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{ GSM48_RR_CAUSE_ABNORMAL_NOACT, "Abnormal release, no activity on radio path" },
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{ GSM48_RR_CAUSE_PREMPTIVE_REL, "Preemptive release" },
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{ GSM48_RR_CAUSE_HNDOVER_IMP, "Handover impossible, timing advance out of range" },
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{ GSM48_RR_CAUSE_CHAN_MODE_UNACCT, "Channel mode unacceptable" },
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{ GSM48_RR_CAUSE_FREQ_NOT_IMPL, "Frequency not implemented" },
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{ GSM48_RR_CAUSE_CALL_CLEARED, "Call already cleared" },
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{ GSM48_RR_CAUSE_SEMANT_INCORR, "Semantically incorrect message" },
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{ GSM48_RR_CAUSE_INVALID_MAND_INF, "Invalid mandatory information" },
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{ GSM48_RR_CAUSE_MSG_TYPE_N, "Message type non-existant or not implemented" },
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{ GSM48_RR_CAUSE_MSG_TYPE_N_COMPAT, "Message type not compatible with protocol state" },
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{ GSM48_RR_CAUSE_COND_IE_ERROR, "Conditional IE error" },
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{ GSM48_RR_CAUSE_NO_CELL_ALLOC_A, "No cell allocation available" },
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{ GSM48_RR_CAUSE_PROT_ERROR_UNSPC, "Protocol error unspecified" },
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{ 0, NULL },
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};
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/* FIXME: convert to value_string */
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static const char *cc_state_names[32] = {
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"NULL",
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"INITIATED",
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"MM_CONNECTION_PEND",
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"MO_CALL_PROC",
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"CALL_DELIVERED",
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"illegal state 5",
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"CALL_PRESENT",
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"CALL_RECEIVED",
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"CONNECT_REQUEST",
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"MO_TERM_CALL_CONF",
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"ACTIVE",
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"DISCONNECT_REQ",
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"DISCONNECT_IND",
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"illegal state 13",
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"illegal state 14",
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"illegal state 15",
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"illegal state 16",
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"illegal state 17",
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"illegal state 18",
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"RELEASE_REQ",
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"illegal state 20",
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"illegal state 21",
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"illegal state 22",
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"illegal state 23",
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"illegal state 24",
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"illegal state 25",
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"MO_ORIG_MODIFY",
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"MO_TERM_MODIFY",
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"CONNECT_IND",
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"illegal state 29",
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"illegal state 30",
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"illegal state 31",
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};
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const char *gsm48_cc_state_name(uint8_t state)
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{
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if (state < ARRAY_SIZE(cc_state_names))
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return cc_state_names[state];
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return "invalid";
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}
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static const struct value_string cc_msg_names[] = {
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{ GSM48_MT_CC_ALERTING, "ALERTING" },
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{ GSM48_MT_CC_CALL_PROC, "CALL_PROC" },
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{ GSM48_MT_CC_PROGRESS, "PROGRESS" },
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{ GSM48_MT_CC_ESTAB, "ESTAB" },
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{ GSM48_MT_CC_SETUP, "SETUP" },
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{ GSM48_MT_CC_ESTAB_CONF, "ESTAB_CONF" },
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{ GSM48_MT_CC_CONNECT, "CONNECT" },
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{ GSM48_MT_CC_CALL_CONF, "CALL_CONF" },
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{ GSM48_MT_CC_START_CC, "START_CC" },
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{ GSM48_MT_CC_RECALL, "RECALL" },
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{ GSM48_MT_CC_EMERG_SETUP, "EMERG_SETUP" },
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{ GSM48_MT_CC_CONNECT_ACK, "CONNECT_ACK" },
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{ GSM48_MT_CC_USER_INFO, "USER_INFO" },
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{ GSM48_MT_CC_MODIFY_REJECT, "MODIFY_REJECT" },
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{ GSM48_MT_CC_MODIFY, "MODIFY" },
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{ GSM48_MT_CC_HOLD, "HOLD" },
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{ GSM48_MT_CC_HOLD_ACK, "HOLD_ACK" },
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{ GSM48_MT_CC_HOLD_REJ, "HOLD_REJ" },
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{ GSM48_MT_CC_RETR, "RETR" },
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{ GSM48_MT_CC_RETR_ACK, "RETR_ACK" },
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{ GSM48_MT_CC_RETR_REJ, "RETR_REJ" },
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{ GSM48_MT_CC_MODIFY_COMPL, "MODIFY_COMPL" },
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{ GSM48_MT_CC_DISCONNECT, "DISCONNECT" },
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{ GSM48_MT_CC_RELEASE_COMPL, "RELEASE_COMPL" },
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{ GSM48_MT_CC_RELEASE, "RELEASE" },
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{ GSM48_MT_CC_STOP_DTMF, "STOP_DTMF" },
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{ GSM48_MT_CC_STOP_DTMF_ACK, "STOP_DTMF_ACK" },
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{ GSM48_MT_CC_STATUS_ENQ, "STATUS_ENQ" },
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{ GSM48_MT_CC_START_DTMF, "START_DTMF" },
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{ GSM48_MT_CC_START_DTMF_ACK, "START_DTMF_ACK" },
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{ GSM48_MT_CC_START_DTMF_REJ, "START_DTMF_REJ" },
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{ GSM48_MT_CC_CONG_CTRL, "CONG_CTRL" },
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{ GSM48_MT_CC_FACILITY, "FACILITY" },
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{ GSM48_MT_CC_STATUS, "STATUS" },
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{ GSM48_MT_CC_NOTIFY, "NOTFIY" },
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{ 0, NULL }
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};
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const char *gsm48_cc_msg_name(uint8_t msgtype)
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{
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return get_value_string(cc_msg_names, msgtype);
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}
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const char *rr_cause_name(uint8_t cause)
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{
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return get_value_string(rr_cause_names, cause);
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}
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static void to_bcd(uint8_t *bcd, uint16_t val)
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{
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bcd[2] = val % 10;
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val = val / 10;
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bcd[1] = val % 10;
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val = val / 10;
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bcd[0] = val % 10;
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val = val / 10;
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}
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void gsm48_generate_lai(struct gsm48_loc_area_id *lai48, uint16_t mcc,
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uint16_t mnc, uint16_t lac)
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{
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uint8_t bcd[3];
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to_bcd(bcd, mcc);
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lai48->digits[0] = bcd[0] | (bcd[1] << 4);
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lai48->digits[1] = bcd[2];
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to_bcd(bcd, mnc);
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/* FIXME: do we need three-digit MNC? See Table 10.5.3 */
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if (mnc > 99) {
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lai48->digits[1] |= bcd[2] << 4;
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lai48->digits[2] = bcd[0] | (bcd[1] << 4);
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} else {
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lai48->digits[1] |= 0xf << 4;
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lai48->digits[2] = bcd[1] | (bcd[2] << 4);
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}
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lai48->lac = htons(lac);
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}
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int gsm48_generate_mid_from_tmsi(uint8_t *buf, uint32_t tmsi)
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{
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uint32_t *tptr = (uint32_t *) &buf[3];
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buf[0] = GSM48_IE_MOBILE_ID;
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buf[1] = GSM48_TMSI_LEN;
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buf[2] = 0xf0 | GSM_MI_TYPE_TMSI;
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*tptr = htonl(tmsi);
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return 7;
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}
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int gsm48_generate_mid_from_imsi(uint8_t *buf, const char *imsi)
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{
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unsigned int length = strlen(imsi), i, off = 0;
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uint8_t odd = (length & 0x1) == 1;
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buf[0] = GSM48_IE_MOBILE_ID;
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buf[2] = char2bcd(imsi[0]) << 4 | GSM_MI_TYPE_IMSI | (odd << 3);
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/* if the length is even we will fill half of the last octet */
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if (odd)
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buf[1] = (length + 1) >> 1;
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else
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buf[1] = (length + 2) >> 1;
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for (i = 1; i < buf[1]; ++i) {
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uint8_t lower, upper;
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lower = char2bcd(imsi[++off]);
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if (!odd && off + 1 == length)
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upper = 0x0f;
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else
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upper = char2bcd(imsi[++off]) & 0x0f;
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buf[2 + i] = (upper << 4) | lower;
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}
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return 2 + buf[1];
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}
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/* Convert Mobile Identity (10.5.1.4) to string */
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int gsm48_mi_to_string(char *string, const int str_len, const uint8_t *mi,
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const int mi_len)
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{
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int i;
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uint8_t mi_type;
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char *str_cur = string;
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uint32_t tmsi;
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mi_type = mi[0] & GSM_MI_TYPE_MASK;
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switch (mi_type) {
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case GSM_MI_TYPE_NONE:
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break;
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case GSM_MI_TYPE_TMSI:
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/* Table 10.5.4.3, reverse generate_mid_from_tmsi */
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if (mi_len == GSM48_TMSI_LEN && mi[0] == (0xf0 | GSM_MI_TYPE_TMSI)) {
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memcpy(&tmsi, &mi[1], 4);
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tmsi = ntohl(tmsi);
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return snprintf(string, str_len, "%u", tmsi);
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}
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break;
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case GSM_MI_TYPE_IMSI:
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case GSM_MI_TYPE_IMEI:
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case GSM_MI_TYPE_IMEISV:
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*str_cur++ = bcd2char(mi[0] >> 4);
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for (i = 1; i < mi_len; i++) {
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if (str_cur + 2 >= string + str_len)
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return str_cur - string;
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*str_cur++ = bcd2char(mi[i] & 0xf);
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/* skip last nibble in last input byte when GSM_EVEN */
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if( (i != mi_len-1) || (mi[0] & GSM_MI_ODD))
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*str_cur++ = bcd2char(mi[i] >> 4);
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}
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break;
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default:
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break;
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}
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*str_cur++ = '\0';
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return str_cur - string;
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}
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void gsm48_parse_ra(struct gprs_ra_id *raid, const uint8_t *buf)
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{
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raid->mcc = (buf[0] & 0xf) * 100;
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raid->mcc += (buf[0] >> 4) * 10;
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raid->mcc += (buf[1] & 0xf) * 1;
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/* I wonder who came up with the stupidity of encoding the MNC
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* differently depending on how many digits its decimal number has! */
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if ((buf[1] >> 4) == 0xf) {
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raid->mnc = (buf[2] & 0xf) * 10;
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raid->mnc += (buf[2] >> 4) * 1;
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} else {
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raid->mnc = (buf[2] & 0xf) * 100;
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raid->mnc += (buf[2] >> 4) * 10;
|
|
raid->mnc += (buf[1] >> 4) * 1;
|
|
}
|
|
|
|
raid->lac = ntohs(*(uint16_t *)(buf + 3));
|
|
raid->rac = buf[5];
|
|
}
|
|
|
|
int gsm48_construct_ra(uint8_t *buf, const struct gprs_ra_id *raid)
|
|
{
|
|
uint16_t mcc = raid->mcc;
|
|
uint16_t mnc = raid->mnc;
|
|
|
|
buf[0] = ((mcc / 100) % 10) | (((mcc / 10) % 10) << 4);
|
|
buf[1] = (mcc % 10);
|
|
|
|
/* I wonder who came up with the stupidity of encoding the MNC
|
|
* differently depending on how many digits its decimal number has! */
|
|
if (mnc < 100) {
|
|
buf[1] |= 0xf0;
|
|
buf[2] = ((mnc / 10) % 10) | ((mnc % 10) << 4);
|
|
} else {
|
|
buf[1] |= (mnc % 10) << 4;
|
|
buf[2] = ((mnc / 100) % 10) | (((mcc / 10) % 10) << 4);
|
|
}
|
|
|
|
*(uint16_t *)(buf+3) = htons(raid->lac);
|
|
|
|
buf[5] = raid->rac;
|
|
|
|
return 6;
|
|
}
|