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libosmocore/src/gsm/gsm48.c

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/* GSM Mobile Radio Interface Layer 3 messages
* 3GPP TS 04.08 version 7.21.0 Release 1998 / ETSI TS 100 940 V7.21.0 */
/* (C) 2008-2010 by Harald Welte <laforge@gnumonks.org>
* (C) 2008, 2009 by Holger Hans Peter Freyther <zecke@selfish.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 <stdio.h>
#include <string.h>
#include <stdbool.h>
#include <osmocom/core/utils.h>
#include <osmocom/core/byteswap.h>
#include <osmocom/core/bit16gen.h>
#include <osmocom/core/bit32gen.h>
#include <osmocom/gsm/tlv.h>
#include <osmocom/gsm/gsm48.h>
#include <osmocom/gsm/gsm0502.h>
#include <osmocom/gsm/gsm_utils.h>
#include <osmocom/gsm/protocol/gsm_04_08.h>
#include <osmocom/gsm/protocol/gsm_08_58.h>
#include <osmocom/gsm/protocol/gsm_04_08_gprs.h>
const struct tlv_definition gsm48_att_tlvdef = {
.def = {
[GSM48_IE_MOBILE_ID] = { TLV_TYPE_TLV },
[GSM48_IE_NAME_LONG] = { TLV_TYPE_TLV },
[GSM48_IE_NAME_SHORT] = { TLV_TYPE_TLV },
[GSM48_IE_UTC] = { TLV_TYPE_TV },
[GSM48_IE_NET_TIME_TZ] = { TLV_TYPE_FIXED, 7 },
[GSM48_IE_LSA_IDENT] = { TLV_TYPE_TLV },
[GSM48_IE_BEARER_CAP] = { TLV_TYPE_TLV },
[GSM48_IE_CAUSE] = { TLV_TYPE_TLV },
[GSM48_IE_CC_CAP] = { TLV_TYPE_TLV },
[GSM48_IE_ALERT] = { TLV_TYPE_TLV },
[GSM48_IE_FACILITY] = { TLV_TYPE_TLV },
[GSM48_IE_PROGR_IND] = { TLV_TYPE_TLV },
[GSM48_IE_AUX_STATUS] = { TLV_TYPE_TLV },
[GSM48_IE_NOTIFY] = { TLV_TYPE_TV },
[GSM48_IE_KPD_FACILITY] = { TLV_TYPE_TV },
[GSM48_IE_SIGNAL] = { TLV_TYPE_TV },
[GSM48_IE_CONN_BCD] = { TLV_TYPE_TLV },
[GSM48_IE_CONN_SUB] = { TLV_TYPE_TLV },
[GSM48_IE_CALLING_BCD] = { TLV_TYPE_TLV },
[GSM48_IE_CALLING_SUB] = { TLV_TYPE_TLV },
[GSM48_IE_CALLED_BCD] = { TLV_TYPE_TLV },
[GSM48_IE_CALLED_SUB] = { TLV_TYPE_TLV },
[GSM48_IE_REDIR_BCD] = { TLV_TYPE_TLV },
[GSM48_IE_REDIR_SUB] = { TLV_TYPE_TLV },
[GSM48_IE_LOWL_COMPAT] = { TLV_TYPE_TLV },
[GSM48_IE_HIGHL_COMPAT] = { TLV_TYPE_TLV },
[GSM48_IE_USER_USER] = { TLV_TYPE_TLV },
[GSM48_IE_SS_VERS] = { TLV_TYPE_TLV },
[GSM48_IE_MORE_DATA] = { TLV_TYPE_T },
[GSM48_IE_CLIR_SUPP] = { TLV_TYPE_T },
[GSM48_IE_CLIR_INVOC] = { TLV_TYPE_T },
[GSM48_IE_REV_C_SETUP] = { TLV_TYPE_T },
[GSM48_IE_REPEAT_CIR] = { TLV_TYPE_T },
[GSM48_IE_REPEAT_SEQ] = { TLV_TYPE_T },
/* FIXME: more elements */
},
};
/* RR elements */
const struct tlv_definition gsm48_rr_att_tlvdef = {
.def = {
/* NOTE: Don't add IE 17 = MOBILE_ID here, it already used. */
[GSM48_IE_VGCS_TARGET] = { TLV_TYPE_TLV },
[GSM48_IE_FRQSHORT_AFTER] = { TLV_TYPE_FIXED, 9 },
[GSM48_IE_MUL_RATE_CFG] = { TLV_TYPE_TLV },
[GSM48_IE_FREQ_L_AFTER] = { TLV_TYPE_TLV },
[GSM48_IE_MSLOT_DESC] = { TLV_TYPE_TLV },
[GSM48_IE_CHANMODE_2] = { TLV_TYPE_TV },
[GSM48_IE_FRQSHORT_BEFORE] = { TLV_TYPE_FIXED, 9 },
[GSM48_IE_CHANMODE_3] = { TLV_TYPE_TV },
[GSM48_IE_CHANMODE_4] = { TLV_TYPE_TV },
[GSM48_IE_CHANMODE_5] = { TLV_TYPE_TV },
[GSM48_IE_CHANMODE_6] = { TLV_TYPE_TV },
[GSM48_IE_CHANMODE_7] = { TLV_TYPE_TV },
[GSM48_IE_CHANMODE_8] = { TLV_TYPE_TV },
[GSM48_IE_FREQ_L_BEFORE] = { TLV_TYPE_TLV },
[GSM48_IE_CH_DESC_1_BEFORE] = { TLV_TYPE_FIXED, 3 },
[GSM48_IE_CH_DESC_2_BEFORE] = { TLV_TYPE_FIXED, 3 },
[GSM48_IE_F_CH_SEQ_BEFORE] = { TLV_TYPE_FIXED, 9 },
[GSM48_IE_CLASSMARK3] = { TLV_TYPE_TLV },
[GSM48_IE_MA_BEFORE] = { TLV_TYPE_TLV },
[GSM48_IE_RR_PACKET_UL] = { TLV_TYPE_TLV },
[GSM48_IE_RR_PACKET_DL] = { TLV_TYPE_TLV },
[GSM48_IE_CELL_CH_DESC] = { TLV_TYPE_FIXED, 16 },
[GSM48_IE_CHANMODE_1] = { TLV_TYPE_TV },
[GSM48_IE_CHDES_2_AFTER] = { TLV_TYPE_FIXED, 3 },
[GSM48_IE_MODE_SEC_CH] = { TLV_TYPE_TV },
[GSM48_IE_F_CH_SEQ_AFTER] = { TLV_TYPE_FIXED, 9 },
[GSM48_IE_MA_AFTER] = { TLV_TYPE_TLV },
[GSM48_IE_BA_RANGE] = { TLV_TYPE_TLV },
[GSM48_IE_GROUP_CHDES] = { TLV_TYPE_TLV },
[GSM48_IE_BA_LIST_PREF] = { TLV_TYPE_TLV },
[GSM48_IE_MOB_OVSERV_DIF] = { TLV_TYPE_TLV },
[GSM48_IE_REALTIME_DIFF] = { TLV_TYPE_TLV },
[GSM48_IE_START_TIME] = { TLV_TYPE_FIXED, 2 },
[GSM48_IE_TIMING_ADVANCE] = { TLV_TYPE_TV },
[GSM48_IE_GROUP_CIP_SEQ] = { TLV_TYPE_SINGLE_TV },
[GSM48_IE_CIP_MODE_SET] = { TLV_TYPE_SINGLE_TV },
[GSM48_IE_GPRS_RESUMPT] = { TLV_TYPE_SINGLE_TV },
[GSM48_IE_SYNC_IND] = { TLV_TYPE_SINGLE_TV },
},
};
/* MM elements */
const struct tlv_definition gsm48_mm_att_tlvdef = {
.def = {
[GSM48_IE_MOBILE_ID] = { TLV_TYPE_TLV },
[GSM48_IE_NAME_LONG] = { TLV_TYPE_TLV },
[GSM48_IE_NAME_SHORT] = { TLV_TYPE_TLV },
[GSM48_IE_UTC] = { TLV_TYPE_TV },
[GSM48_IE_NET_TIME_TZ] = { TLV_TYPE_FIXED, 7 },
[GSM48_IE_LSA_IDENT] = { TLV_TYPE_TLV },
[GSM48_IE_NET_DST] = { TLV_TYPE_TLV },
[GSM48_IE_LOCATION_AREA] = { TLV_TYPE_FIXED, 5 },
[GSM48_IE_PRIORITY_LEV] = { TLV_TYPE_SINGLE_TV },
[GSM48_IE_FOLLOW_ON_PROC] = { TLV_TYPE_T },
[GSM48_IE_CTS_PERMISSION] = { TLV_TYPE_T },
},
};
static const struct value_string rr_cause_names[] = {
{ GSM48_RR_CAUSE_NORMAL, "Normal event" },
{ GSM48_RR_CAUSE_ABNORMAL_UNSPEC, "Abnormal release, unspecified" },
{ GSM48_RR_CAUSE_ABNORMAL_UNACCT, "Abnormal release, channel unacceptable" },
{ GSM48_RR_CAUSE_ABNORMAL_TIMER, "Abnormal release, timer expired" },
{ GSM48_RR_CAUSE_ABNORMAL_NOACT, "Abnormal release, no activity on radio path" },
{ GSM48_RR_CAUSE_PREMPTIVE_REL, "Preemptive release" },
{ GSM48_RR_CAUSE_HNDOVER_IMP, "Handover impossible, timing advance out of range" },
{ GSM48_RR_CAUSE_CHAN_MODE_UNACCT, "Channel mode unacceptable" },
{ GSM48_RR_CAUSE_FREQ_NOT_IMPL, "Frequency not implemented" },
{ GSM48_RR_CAUSE_CALL_CLEARED, "Call already cleared" },
{ GSM48_RR_CAUSE_SEMANT_INCORR, "Semantically incorrect message" },
{ GSM48_RR_CAUSE_INVALID_MAND_INF, "Invalid mandatory information" },
{ GSM48_RR_CAUSE_MSG_TYPE_N, "Message type non-existant or not implemented" },
{ GSM48_RR_CAUSE_MSG_TYPE_N_COMPAT, "Message type not compatible with protocol state" },
{ GSM48_RR_CAUSE_COND_IE_ERROR, "Conditional IE error" },
{ GSM48_RR_CAUSE_NO_CELL_ALLOC_A, "No cell allocation available" },
{ GSM48_RR_CAUSE_PROT_ERROR_UNSPC, "Protocol error unspecified" },
{ 0, NULL },
};
const char *rr_cause_name(uint8_t cause)
{
return get_value_string(rr_cause_names, cause);
}
/* FIXME: convert to value_string */
static const char *cc_state_names[32] = {
"NULL",
"INITIATED",
"MM_CONNECTION_PEND",
"MO_CALL_PROC",
"CALL_DELIVERED",
"illegal state 5",
"CALL_PRESENT",
"CALL_RECEIVED",
"CONNECT_REQUEST",
"MO_TERM_CALL_CONF",
"ACTIVE",
"DISCONNECT_REQ",
"DISCONNECT_IND",
"illegal state 13",
"illegal state 14",
"illegal state 15",
"illegal state 16",
"illegal state 17",
"illegal state 18",
"RELEASE_REQ",
"illegal state 20",
"illegal state 21",
"illegal state 22",
"illegal state 23",
"illegal state 24",
"illegal state 25",
"MO_ORIG_MODIFY",
"MO_TERM_MODIFY",
"CONNECT_IND",
"illegal state 29",
"illegal state 30",
"illegal state 31",
};
const char *gsm48_cc_state_name(uint8_t state)
{
if (state < ARRAY_SIZE(cc_state_names))
return cc_state_names[state];
return "invalid";
}
static const struct value_string cc_msg_names[] = {
{ GSM48_MT_CC_ALERTING, "ALERTING" },
{ GSM48_MT_CC_CALL_PROC, "CALL_PROC" },
{ GSM48_MT_CC_PROGRESS, "PROGRESS" },
{ GSM48_MT_CC_ESTAB, "ESTAB" },
{ GSM48_MT_CC_SETUP, "SETUP" },
{ GSM48_MT_CC_ESTAB_CONF, "ESTAB_CONF" },
{ GSM48_MT_CC_CONNECT, "CONNECT" },
{ GSM48_MT_CC_CALL_CONF, "CALL_CONF" },
{ GSM48_MT_CC_START_CC, "START_CC" },
{ GSM48_MT_CC_RECALL, "RECALL" },
{ GSM48_MT_CC_EMERG_SETUP, "EMERG_SETUP" },
{ GSM48_MT_CC_CONNECT_ACK, "CONNECT_ACK" },
{ GSM48_MT_CC_USER_INFO, "USER_INFO" },
{ GSM48_MT_CC_MODIFY_REJECT, "MODIFY_REJECT" },
{ GSM48_MT_CC_MODIFY, "MODIFY" },
{ GSM48_MT_CC_HOLD, "HOLD" },
{ GSM48_MT_CC_HOLD_ACK, "HOLD_ACK" },
{ GSM48_MT_CC_HOLD_REJ, "HOLD_REJ" },
{ GSM48_MT_CC_RETR, "RETR" },
{ GSM48_MT_CC_RETR_ACK, "RETR_ACK" },
{ GSM48_MT_CC_RETR_REJ, "RETR_REJ" },
{ GSM48_MT_CC_MODIFY_COMPL, "MODIFY_COMPL" },
{ GSM48_MT_CC_DISCONNECT, "DISCONNECT" },
{ GSM48_MT_CC_RELEASE_COMPL, "RELEASE_COMPL" },
{ GSM48_MT_CC_RELEASE, "RELEASE" },
{ GSM48_MT_CC_STOP_DTMF, "STOP_DTMF" },
{ GSM48_MT_CC_STOP_DTMF_ACK, "STOP_DTMF_ACK" },
{ GSM48_MT_CC_STATUS_ENQ, "STATUS_ENQ" },
{ GSM48_MT_CC_START_DTMF, "START_DTMF" },
{ GSM48_MT_CC_START_DTMF_ACK, "START_DTMF_ACK" },
{ GSM48_MT_CC_START_DTMF_REJ, "START_DTMF_REJ" },
{ GSM48_MT_CC_CONG_CTRL, "CONG_CTRL" },
{ GSM48_MT_CC_FACILITY, "FACILITY" },
{ GSM48_MT_CC_STATUS, "STATUS" },
{ GSM48_MT_CC_NOTIFY, "NOTFIY" },
{ 0, NULL }
};
const char *gsm48_cc_msg_name(uint8_t msgtype)
{
return get_value_string(cc_msg_names, msgtype);
}
static const struct value_string rr_msg_names[] = {
/* Channel establishment messages */
{ GSM48_MT_RR_INIT_REQ, "RR INITIALISATION REQUEST" },
{ GSM48_MT_RR_ADD_ASS, "ADDITIONAL ASSIGNMENT" },
{ GSM48_MT_RR_IMM_ASS, "IMMEDIATE ASSIGNMENT" },
{ GSM48_MT_RR_IMM_ASS_EXT, "MMEDIATE ASSIGNMENT EXTENDED" },
{ GSM48_MT_RR_IMM_ASS_REJ, "IMMEDIATE ASSIGNMENT REJECT" },
{ GSM48_MT_RR_DTM_ASS_FAIL, "DTM ASSIGNMENT FAILURE" },
{ GSM48_MT_RR_DTM_REJECT, "DTM REJECT" },
{ GSM48_MT_RR_DTM_REQUEST, "DTM REQUEST" },
{ GSM48_MT_RR_PACKET_ASS, "PACKET ASSIGNMENT" },
/* Ciphering messages */
{ GSM48_MT_RR_CIPH_M_CMD, "CIPHERING MODE COMMAND" },
{ GSM48_MT_RR_CIPH_M_COMPL, "CIPHERING MODE COMPLETE" },
/* Configuration change messages */
{ GSM48_MT_RR_CFG_CHG_CMD, "CONFIGURATION CHANGE COMMAND" },
{ GSM48_MT_RR_CFG_CHG_ACK, "CONFIGURATION CHANGE ACK" },
{ GSM48_MT_RR_CFG_CHG_REJ, "CONFIGURATION CHANGE REJECT" },
/* Handover messages */
{ GSM48_MT_RR_ASS_CMD, "ASSIGNMENT COMMAND" },
{ GSM48_MT_RR_ASS_COMPL, "ASSIGNMENT COMPLETE" },
{ GSM48_MT_RR_ASS_FAIL, "ASSIGNMENT FAILURE" },
{ GSM48_MT_RR_HANDO_CMD, "HANDOVER COMMAND" },
{ GSM48_MT_RR_HANDO_COMPL, "HANDOVER COMPLETE" },
{ GSM48_MT_RR_HANDO_FAIL, "HANDOVER FAILURE" },
{ GSM48_MT_RR_HANDO_INFO, "PHYSICAL INFORMATION" },
{ GSM48_MT_RR_DTM_ASS_CMD, "DTM ASSIGNMENT COMMAND" },
{ GSM48_MT_RR_CELL_CHG_ORDER, "RR-CELL CHANGE ORDER" },
{ GSM48_MT_RR_PDCH_ASS_CMD, "PDCH ASSIGNMENT COMMAND" },
/* Channel release messages */
{ GSM48_MT_RR_CHAN_REL, "CHANNEL RELEASE" },
{ GSM48_MT_RR_PART_REL, "PARTIAL RELEASE" },
{ GSM48_MT_RR_PART_REL_COMP, "PARTIAL RELEASE COMPLETE" },
/* Paging and Notification messages */
{ GSM48_MT_RR_PAG_REQ_1, "PAGING REQUEST TYPE 1" },
{ GSM48_MT_RR_PAG_REQ_2, "PAGING REQUEST TYPE 2" },
{ GSM48_MT_RR_PAG_REQ_3, "PAGING REQUEST TYPE 3" },
{ GSM48_MT_RR_PAG_RESP, "PAGING RESPONSE" },
{ GSM48_MT_RR_NOTIF_NCH, "NOTIFICATION/NCH" },
{ GSM48_MT_RR_NOTIF_FACCH, "(Reserved)" },
{ GSM48_MT_RR_NOTIF_RESP, "NOTIFICATION/RESPONSE" },
{ GSM48_MT_RR_PACKET_NOTIF, "PACKET NOTIFICATION" },
/* 3G Specific messages */
{ GSM48_MT_RR_UTRAN_CLSM_CHG, "UTRAN Classmark Change" },
{ GSM48_MT_RR_CDMA2K_CLSM_CHG, "cdma 2000 Classmark Change" },
{ GSM48_MT_RR_IS_TO_UTRAN_HANDO, "Inter System to UTRAN Handover Command" },
{ GSM48_MT_RR_IS_TO_CDMA2K_HANDO, "Inter System to cdma2000 Handover Command" },
/* System information messages */
{ GSM48_MT_RR_SYSINFO_8, "SYSTEM INFORMATION TYPE 8" },
{ GSM48_MT_RR_SYSINFO_1, "SYSTEM INFORMATION TYPE 1" },
{ GSM48_MT_RR_SYSINFO_2, "SYSTEM INFORMATION TYPE 2" },
{ GSM48_MT_RR_SYSINFO_3, "SYSTEM INFORMATION TYPE 3" },
{ GSM48_MT_RR_SYSINFO_4, "SYSTEM INFORMATION TYPE 4" },
{ GSM48_MT_RR_SYSINFO_5, "SYSTEM INFORMATION TYPE 5" },
{ GSM48_MT_RR_SYSINFO_6, "SYSTEM INFORMATION TYPE 6" },
{ GSM48_MT_RR_SYSINFO_7, "SYSTEM INFORMATION TYPE 7" },
{ GSM48_MT_RR_SYSINFO_2bis, "SYSTEM INFORMATION TYPE 2bis" },
{ GSM48_MT_RR_SYSINFO_2ter, "SYSTEM INFORMATION TYPE 2ter" },
{ GSM48_MT_RR_SYSINFO_2quater, "SYSTEM INFORMATION TYPE 2quater" },
{ GSM48_MT_RR_SYSINFO_5bis, "SYSTEM INFORMATION TYPE 5bis" },
{ GSM48_MT_RR_SYSINFO_5ter, "SYSTEM INFORMATION TYPE 5ter" },
{ GSM48_MT_RR_SYSINFO_9, "SYSTEM INFORMATION TYPE 9" },
{ GSM48_MT_RR_SYSINFO_13, "SYSTEM INFORMATION TYPE 13" },
{ GSM48_MT_RR_SYSINFO_16, "SYSTEM INFORMATION TYPE 16" },
{ GSM48_MT_RR_SYSINFO_17, "SYSTEM INFORMATION TYPE 17" },
{ GSM48_MT_RR_SYSINFO_18, "SYSTEM INFORMATION TYPE 18" },
{ GSM48_MT_RR_SYSINFO_19, "SYSTEM INFORMATION TYPE 19" },
{ GSM48_MT_RR_SYSINFO_20, "SYSTEM INFORMATION TYPE 20" },
/* Miscellaneous messages */
{ GSM48_MT_RR_CHAN_MODE_MODIF, "CHANNEL MODE MODIFY" },
{ GSM48_MT_RR_STATUS, "RR STATUS" },
{ GSM48_MT_RR_CHAN_MODE_MODIF_ACK, "CHANNEL MODE MODIFY ACKNOWLEDGE" },
{ GSM48_MT_RR_FREQ_REDEF, "FREQUENCY REDEFINITION" },
{ GSM48_MT_RR_MEAS_REP, "MEASUREMENT REPORT" },
{ GSM48_MT_RR_CLSM_CHG, "CLASSMARK CHANGE" },
{ GSM48_MT_RR_CLSM_ENQ, "CLASSMARK ENQUIRY" },
{ GSM48_MT_RR_EXT_MEAS_REP, "EXTENDED MEASUREMENT REPORT" },
{ GSM48_MT_RR_EXT_MEAS_REP_ORD, "EXTENDED MEASUREMENT ORDER" },
{ GSM48_MT_RR_GPRS_SUSP_REQ, "GPRS SUSPENSION REQUEST" },
{ GSM48_MT_RR_DTM_INFO, "DTM INFORMATION" },
/* VGCS uplink control messages */
{ GSM48_MT_RR_VGCS_UPL_GRANT, "VGCS UPLINK GRANT" },
{ GSM48_MT_RR_UPLINK_RELEASE, "UPLINK RELEASE" },
{ GSM48_MT_RR_UPLINK_FREE, "0c" },
{ GSM48_MT_RR_UPLINK_BUSY, "UPLINK BUSY" },
{ GSM48_MT_RR_TALKER_IND, "TALKER INDICATION" },
/* Application messages */
{ GSM48_MT_RR_APP_INFO, "Application Information" },
{ 0, NULL }
};
const char *gsm48_rr_msg_name(uint8_t msgtype)
{
return get_value_string(rr_msg_names, msgtype);
}
const struct value_string gsm48_chan_mode_names[] = {
{ GSM48_CMODE_SIGN, "SIGNALLING" },
{ GSM48_CMODE_SPEECH_V1, "SPEECH_V1" },
{ GSM48_CMODE_SPEECH_EFR, "SPEECH_EFR" },
{ GSM48_CMODE_SPEECH_AMR, "SPEECH_AMR" },
{ GSM48_CMODE_DATA_14k5, "DATA_14k5" },
{ GSM48_CMODE_DATA_12k0, "DATA_12k0" },
{ GSM48_CMODE_DATA_6k0, "DATA_6k0" },
{ GSM48_CMODE_DATA_3k6, "DATA_3k6" },
{ 0, NULL },
};
const struct value_string gsm_chan_t_names[] = {
{ GSM_LCHAN_NONE, "NONE" },
{ GSM_LCHAN_SDCCH, "SDCCH" },
{ GSM_LCHAN_TCH_F, "TCH_F" },
{ GSM_LCHAN_TCH_H, "TCH_H" },
{ GSM_LCHAN_UNKNOWN, "UNKNOWN" },
{ GSM_LCHAN_CCCH, "CCCH" },
{ GSM_LCHAN_PDTCH, "PDTCH" },
{ GSM_LCHAN_CBCH, "CBCH" },
{ 0, NULL },
};
static const struct value_string mi_type_names[] = {
{ GSM_MI_TYPE_NONE, "NONE" },
{ GSM_MI_TYPE_IMSI, "IMSI" },
{ GSM_MI_TYPE_IMEI, "IMEI" },
{ GSM_MI_TYPE_IMEISV, "IMEI-SV" },
{ GSM_MI_TYPE_TMSI, "TMSI" },
{ 0, NULL }
};
const char *gsm48_mi_type_name(uint8_t mi)
{
return get_value_string(mi_type_names, mi);
}
static void to_bcd(uint8_t *bcd, uint16_t val)
{
bcd[2] = val % 10;
val = val / 10;
bcd[1] = val % 10;
val = val / 10;
bcd[0] = val % 10;
val = val / 10;
}
/*! \brief Checks is particular message is cipherable in A/Gb mode according to
* 3GPP TS 24.008 § 4.7.1.2
* \param[in] hdr Message header
* \return true if message can be encrypted, false otherwise
*/
bool gsm48_hdr_gmm_cipherable(const struct gsm48_hdr *hdr)
{
switch(hdr->msg_type) {
case GSM48_MT_GMM_ATTACH_REQ:
case GSM48_MT_GMM_ATTACH_REJ:
case GSM48_MT_GMM_AUTH_CIPH_REQ:
case GSM48_MT_GMM_AUTH_CIPH_RESP:
case GSM48_MT_GMM_AUTH_CIPH_REJ:
case GSM48_MT_GMM_AUTH_CIPH_FAIL:
case GSM48_MT_GMM_ID_REQ:
case GSM48_MT_GMM_ID_RESP:
case GSM48_MT_GMM_RA_UPD_REQ:
case GSM48_MT_GMM_RA_UPD_REJ:
return false;
default:
return true;
}
}
/* Convert given mcc and mnc to BCD and write to *bcd_dst, which must be an
* allocated buffer of (at least) 3 bytes length. */
void gsm48_mcc_mnc_to_bcd(uint8_t *bcd_dst, uint16_t mcc, uint16_t mnc)
{
uint8_t bcd[3];
to_bcd(bcd, mcc);
bcd_dst[0] = bcd[0] | (bcd[1] << 4);
bcd_dst[1] = bcd[2];
to_bcd(bcd, mnc);
/* FIXME: do we need three-digit MNC? See Table 10.5.3 */
if (mnc > 99) {
bcd_dst[1] |= bcd[2] << 4;
bcd_dst[2] = bcd[0] | (bcd[1] << 4);
} else {
bcd_dst[1] |= 0xf << 4;
bcd_dst[2] = bcd[1] | (bcd[2] << 4);
}
}
/* Convert given 3-byte BCD buffer to integers and write results to *mcc and
* *mnc. The first three BCD digits result in the MCC and the remaining ones in
* the MNC. */
void gsm48_mcc_mnc_from_bcd(uint8_t *bcd_src, uint16_t *mcc, uint16_t *mnc)
{
*mcc = (bcd_src[0] & 0x0f) * 100
+ (bcd_src[0] >> 4) * 10
+ (bcd_src[1] & 0x0f);
if ((bcd_src[1] & 0xf0) == 0xf0) {
*mnc = (bcd_src[2] & 0x0f) * 10
+ (bcd_src[2] >> 4);
} else {
*mnc = (bcd_src[2] & 0x0f) * 100
+ (bcd_src[2] >> 4) * 10
+ (bcd_src[1] >> 4);
}
}
void gsm48_generate_lai(struct gsm48_loc_area_id *lai48, uint16_t mcc,
uint16_t mnc, uint16_t lac)
{
gsm48_mcc_mnc_to_bcd(&lai48->digits[0], mcc, mnc);
lai48->lac = osmo_htons(lac);
}
/* Attention: this function returns true integers, not hex! */
int gsm48_decode_lai(struct gsm48_loc_area_id *lai, uint16_t *mcc,
uint16_t *mnc, uint16_t *lac)
{
gsm48_mcc_mnc_from_bcd(&lai->digits[0], mcc, mnc);
*lac = osmo_ntohs(lai->lac);
return 0;
}
/*! \brief Set DTX mode in Cell Options IE (3GPP TS 44.018)
* \param[in] op Cell Options structure in which DTX parameters will be set
* \param[in] full Mode for full-rate channels
* \param[in] half Mode for half-rate channels
* \param[in] is_bcch Indicates if we should use 10.5.2.3.1 instead of
* 10.5.2.3a.2
*
* There is no space for separate DTX settings for Full and Half rate channels
* in BCCH - in this case full setting is used for both and half parameter is
* ignored.
*/
void gsm48_set_dtx(struct gsm48_cell_options *op, enum gsm48_dtx_mode full,
enum gsm48_dtx_mode half, bool is_bcch)
{
if (is_bcch) {
switch (full) {
case GSM48_DTX_MAY_BE_USED:
op->dtx = 0;
return;
case GSM48_DTX_SHALL_BE_USED:
op->dtx = 1;
return;
case GSM48_DTX_SHALL_NOT_BE_USED:
op->dtx = 2;
return;
}
} else {
switch (full) {
case GSM48_DTX_MAY_BE_USED:
op->dtx = (half == GSM48_DTX_SHALL_BE_USED) ? 3 : 0;
op->d = (half == GSM48_DTX_SHALL_NOT_BE_USED) ? 0 : 1;
return;
case GSM48_DTX_SHALL_BE_USED:
op->dtx = (half == GSM48_DTX_MAY_BE_USED) ? 3 : 1;
op->d = (half == GSM48_DTX_SHALL_BE_USED) ? 1 : 0;
return;
case GSM48_DTX_SHALL_NOT_BE_USED:
op->dtx = 2;
op->d = (half == GSM48_DTX_SHALL_BE_USED) ? 1 : 0;
return;
}
}
}
int gsm48_generate_mid_from_tmsi(uint8_t *buf, uint32_t tmsi)
{
uint32_t tmsi_be = osmo_htonl(tmsi);
buf[0] = GSM48_IE_MOBILE_ID;
buf[1] = GSM48_TMSI_LEN;
buf[2] = 0xf0 | GSM_MI_TYPE_TMSI;
memcpy(&buf[3], &tmsi_be, sizeof(tmsi_be));
return 7;
}
int gsm48_generate_mid_from_imsi(uint8_t *buf, const char *imsi)
{
unsigned int length = strlen(imsi), i, off = 0;
uint8_t odd = (length & 0x1) == 1;
buf[0] = GSM48_IE_MOBILE_ID;
buf[2] = osmo_char2bcd(imsi[0]) << 4 | GSM_MI_TYPE_IMSI | (odd << 3);
/* if the length is even we will fill half of the last octet */
if (odd)
buf[1] = (length + 1) >> 1;
else
buf[1] = (length + 2) >> 1;
for (i = 1; i < buf[1]; ++i) {
uint8_t lower, upper;
lower = osmo_char2bcd(imsi[++off]);
if (!odd && off + 1 == length)
upper = 0x0f;
else
upper = osmo_char2bcd(imsi[++off]) & 0x0f;
buf[2 + i] = (upper << 4) | lower;
}
return 2 + buf[1];
}
/* Convert Mobile Identity (10.5.1.4) to string */
int gsm48_mi_to_string(char *string, const int str_len, const uint8_t *mi,
const int mi_len)
{
int i;
uint8_t mi_type;
char *str_cur = string;
uint32_t tmsi;
mi_type = mi[0] & GSM_MI_TYPE_MASK;
switch (mi_type) {
case GSM_MI_TYPE_NONE:
break;
case GSM_MI_TYPE_TMSI:
/* Table 10.5.4.3, reverse generate_mid_from_tmsi */
if (mi_len == GSM48_TMSI_LEN && mi[0] == (0xf0 | GSM_MI_TYPE_TMSI)) {
tmsi = osmo_load32be(&mi[1]);
return snprintf(string, str_len, "%u", tmsi);
}
break;
case GSM_MI_TYPE_IMSI:
case GSM_MI_TYPE_IMEI:
case GSM_MI_TYPE_IMEISV:
*str_cur++ = osmo_bcd2char(mi[0] >> 4);
for (i = 1; i < mi_len; i++) {
if (str_cur + 2 >= string + str_len)
return str_cur - string;
*str_cur++ = osmo_bcd2char(mi[i] & 0xf);
/* skip last nibble in last input byte when GSM_EVEN */
if( (i != mi_len-1) || (mi[0] & GSM_MI_ODD))
*str_cur++ = osmo_bcd2char(mi[i] >> 4);
}
break;
default:
break;
}
*str_cur++ = '\0';
return str_cur - string;
}
void gsm48_parse_ra(struct gprs_ra_id *raid, const uint8_t *buf)
{
raid->mcc = (buf[0] & 0xf) * 100;
raid->mcc += (buf[0] >> 4) * 10;
raid->mcc += (buf[1] & 0xf) * 1;
/* I wonder who came up with the stupidity of encoding the MNC
* differently depending on how many digits its decimal number has! */
if ((buf[1] >> 4) == 0xf) {
raid->mnc = (buf[2] & 0xf) * 10;
raid->mnc += (buf[2] >> 4) * 1;
} else {
raid->mnc = (buf[2] & 0xf) * 100;
raid->mnc += (buf[2] >> 4) * 10;
raid->mnc += (buf[1] >> 4) * 1;
}
raid->lac = osmo_load16be(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;
uint16_t _lac;
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) | (((mnc / 10) % 10) << 4);
}
_lac = osmo_htons(raid->lac);
memcpy(buf + 3, &_lac, 2);
buf[5] = raid->rac;
return 6;
}
/* From Table 10.5.33 of GSM 04.08 */
int gsm48_number_of_paging_subchannels(struct gsm48_control_channel_descr *chan_desc)
{
unsigned int n_pag_blocks = gsm0502_get_n_pag_blocks(chan_desc);
if (chan_desc->ccch_conf == RSL_BCCH_CCCH_CONF_1_C)
return OSMO_MAX(1, n_pag_blocks) * (chan_desc->bs_pa_mfrms + 2);
else
return n_pag_blocks * (chan_desc->bs_pa_mfrms + 2);
}
const struct value_string gsm48_pdisc_names[] = {
OSMO_VALUE_STRING(GSM48_PDISC_GROUP_CC),
OSMO_VALUE_STRING(GSM48_PDISC_BCAST_CC),
OSMO_VALUE_STRING(GSM48_PDISC_PDSS1),
OSMO_VALUE_STRING(GSM48_PDISC_CC),
OSMO_VALUE_STRING(GSM48_PDISC_PDSS2),
OSMO_VALUE_STRING(GSM48_PDISC_MM),
OSMO_VALUE_STRING(GSM48_PDISC_RR),
OSMO_VALUE_STRING(GSM48_PDISC_MM_GPRS),
OSMO_VALUE_STRING(GSM48_PDISC_SMS),
OSMO_VALUE_STRING(GSM48_PDISC_SM_GPRS),
OSMO_VALUE_STRING(GSM48_PDISC_NC_SS),
OSMO_VALUE_STRING(GSM48_PDISC_LOC),
OSMO_VALUE_STRING(GSM48_PDISC_EXTEND),
OSMO_VALUE_STRING(GSM48_PDISC_MASK),
OSMO_VALUE_STRING(GSM48_PDISC_USSD),
{ 0, NULL }
};
const struct value_string gsm48_rr_msgtype_names[] = {
OSMO_VALUE_STRING(GSM48_MT_RR_INIT_REQ),
OSMO_VALUE_STRING(GSM48_MT_RR_ADD_ASS),
OSMO_VALUE_STRING(GSM48_MT_RR_IMM_ASS),
OSMO_VALUE_STRING(GSM48_MT_RR_IMM_ASS_EXT),
OSMO_VALUE_STRING(GSM48_MT_RR_IMM_ASS_REJ),
OSMO_VALUE_STRING(GSM48_MT_RR_DTM_ASS_FAIL),
OSMO_VALUE_STRING(GSM48_MT_RR_DTM_REJECT),
OSMO_VALUE_STRING(GSM48_MT_RR_DTM_REQUEST),
OSMO_VALUE_STRING(GSM48_MT_RR_PACKET_ASS),
OSMO_VALUE_STRING(GSM48_MT_RR_CIPH_M_CMD),
OSMO_VALUE_STRING(GSM48_MT_RR_CIPH_M_COMPL),
OSMO_VALUE_STRING(GSM48_MT_RR_CFG_CHG_CMD),
OSMO_VALUE_STRING(GSM48_MT_RR_CFG_CHG_ACK),
OSMO_VALUE_STRING(GSM48_MT_RR_CFG_CHG_REJ),
OSMO_VALUE_STRING(GSM48_MT_RR_ASS_CMD),
OSMO_VALUE_STRING(GSM48_MT_RR_ASS_COMPL),
OSMO_VALUE_STRING(GSM48_MT_RR_ASS_FAIL),
OSMO_VALUE_STRING(GSM48_MT_RR_HANDO_CMD),
OSMO_VALUE_STRING(GSM48_MT_RR_HANDO_COMPL),
OSMO_VALUE_STRING(GSM48_MT_RR_HANDO_FAIL),
OSMO_VALUE_STRING(GSM48_MT_RR_HANDO_INFO),
OSMO_VALUE_STRING(GSM48_MT_RR_HANDO_INFO),
OSMO_VALUE_STRING(GSM48_MT_RR_DTM_ASS_CMD),
OSMO_VALUE_STRING(GSM48_MT_RR_CELL_CHG_ORDER),
OSMO_VALUE_STRING(GSM48_MT_RR_PDCH_ASS_CMD),
OSMO_VALUE_STRING(GSM48_MT_RR_CHAN_REL),
OSMO_VALUE_STRING(GSM48_MT_RR_PART_REL),
OSMO_VALUE_STRING(GSM48_MT_RR_PART_REL_COMP),
OSMO_VALUE_STRING(GSM48_MT_RR_PAG_REQ_1),
OSMO_VALUE_STRING(GSM48_MT_RR_PAG_REQ_2),
OSMO_VALUE_STRING(GSM48_MT_RR_PAG_REQ_3),
OSMO_VALUE_STRING(GSM48_MT_RR_PAG_RESP),
OSMO_VALUE_STRING(GSM48_MT_RR_NOTIF_NCH),
OSMO_VALUE_STRING(GSM48_MT_RR_NOTIF_FACCH),
OSMO_VALUE_STRING(GSM48_MT_RR_NOTIF_RESP),
OSMO_VALUE_STRING(GSM48_MT_RR_PACKET_NOTIF),
OSMO_VALUE_STRING(GSM48_MT_RR_UTRAN_CLSM_CHG),
OSMO_VALUE_STRING(GSM48_MT_RR_CDMA2K_CLSM_CHG),
OSMO_VALUE_STRING(GSM48_MT_RR_IS_TO_UTRAN_HANDO),
OSMO_VALUE_STRING(GSM48_MT_RR_IS_TO_CDMA2K_HANDO),
OSMO_VALUE_STRING(GSM48_MT_RR_SYSINFO_8),
OSMO_VALUE_STRING(GSM48_MT_RR_SYSINFO_1),
OSMO_VALUE_STRING(GSM48_MT_RR_SYSINFO_2),
OSMO_VALUE_STRING(GSM48_MT_RR_SYSINFO_3),
OSMO_VALUE_STRING(GSM48_MT_RR_SYSINFO_4),
OSMO_VALUE_STRING(GSM48_MT_RR_SYSINFO_5),
OSMO_VALUE_STRING(GSM48_MT_RR_SYSINFO_6),
OSMO_VALUE_STRING(GSM48_MT_RR_SYSINFO_7),
OSMO_VALUE_STRING(GSM48_MT_RR_SYSINFO_2bis),
OSMO_VALUE_STRING(GSM48_MT_RR_SYSINFO_2ter),
OSMO_VALUE_STRING(GSM48_MT_RR_SYSINFO_2quater),
OSMO_VALUE_STRING(GSM48_MT_RR_SYSINFO_5bis),
OSMO_VALUE_STRING(GSM48_MT_RR_SYSINFO_5ter),
OSMO_VALUE_STRING(GSM48_MT_RR_SYSINFO_9),
OSMO_VALUE_STRING(GSM48_MT_RR_SYSINFO_13),
OSMO_VALUE_STRING(GSM48_MT_RR_SYSINFO_16),
OSMO_VALUE_STRING(GSM48_MT_RR_SYSINFO_17),
OSMO_VALUE_STRING(GSM48_MT_RR_SYSINFO_18),
OSMO_VALUE_STRING(GSM48_MT_RR_SYSINFO_19),
OSMO_VALUE_STRING(GSM48_MT_RR_SYSINFO_20),
OSMO_VALUE_STRING(GSM48_MT_RR_CHAN_MODE_MODIF),
OSMO_VALUE_STRING(GSM48_MT_RR_STATUS),
OSMO_VALUE_STRING(GSM48_MT_RR_CHAN_MODE_MODIF_ACK),
OSMO_VALUE_STRING(GSM48_MT_RR_FREQ_REDEF),
OSMO_VALUE_STRING(GSM48_MT_RR_MEAS_REP),
OSMO_VALUE_STRING(GSM48_MT_RR_CLSM_CHG),
OSMO_VALUE_STRING(GSM48_MT_RR_CLSM_ENQ),
OSMO_VALUE_STRING(GSM48_MT_RR_EXT_MEAS_REP),
OSMO_VALUE_STRING(GSM48_MT_RR_EXT_MEAS_REP_ORD),
OSMO_VALUE_STRING(GSM48_MT_RR_GPRS_SUSP_REQ),
OSMO_VALUE_STRING(GSM48_MT_RR_DTM_INFO),
OSMO_VALUE_STRING(GSM48_MT_RR_VGCS_UPL_GRANT),
OSMO_VALUE_STRING(GSM48_MT_RR_UPLINK_RELEASE),
OSMO_VALUE_STRING(GSM48_MT_RR_UPLINK_FREE),
OSMO_VALUE_STRING(GSM48_MT_RR_UPLINK_BUSY),
OSMO_VALUE_STRING(GSM48_MT_RR_TALKER_IND),
{ 0, NULL }
};
const struct value_string gsm48_mm_msgtype_names[] = {
OSMO_VALUE_STRING(GSM48_MT_MM_IMSI_DETACH_IND),
OSMO_VALUE_STRING(GSM48_MT_MM_LOC_UPD_ACCEPT),
OSMO_VALUE_STRING(GSM48_MT_MM_LOC_UPD_REJECT),
OSMO_VALUE_STRING(GSM48_MT_MM_LOC_UPD_REQUEST),
OSMO_VALUE_STRING(GSM48_MT_MM_AUTH_REJ),
OSMO_VALUE_STRING(GSM48_MT_MM_AUTH_REQ),
OSMO_VALUE_STRING(GSM48_MT_MM_AUTH_RESP),
OSMO_VALUE_STRING(GSM48_MT_MM_AUTH_FAIL),
OSMO_VALUE_STRING(GSM48_MT_MM_ID_REQ),
OSMO_VALUE_STRING(GSM48_MT_MM_ID_RESP),
OSMO_VALUE_STRING(GSM48_MT_MM_TMSI_REALL_CMD),
OSMO_VALUE_STRING(GSM48_MT_MM_TMSI_REALL_COMPL),
OSMO_VALUE_STRING(GSM48_MT_MM_CM_SERV_ACC),
OSMO_VALUE_STRING(GSM48_MT_MM_CM_SERV_REJ),
OSMO_VALUE_STRING(GSM48_MT_MM_CM_SERV_ABORT),
OSMO_VALUE_STRING(GSM48_MT_MM_CM_SERV_REQ),
OSMO_VALUE_STRING(GSM48_MT_MM_CM_SERV_PROMPT),
OSMO_VALUE_STRING(GSM48_MT_MM_CM_REEST_REQ),
OSMO_VALUE_STRING(GSM48_MT_MM_ABORT),
OSMO_VALUE_STRING(GSM48_MT_MM_NULL),
OSMO_VALUE_STRING(GSM48_MT_MM_STATUS),
OSMO_VALUE_STRING(GSM48_MT_MM_INFO),
{ 0, NULL }
};
const struct value_string gsm48_cc_msgtype_names[] = {
OSMO_VALUE_STRING(GSM48_MT_CC_ALERTING),
OSMO_VALUE_STRING(GSM48_MT_CC_CALL_CONF),
OSMO_VALUE_STRING(GSM48_MT_CC_CALL_PROC),
OSMO_VALUE_STRING(GSM48_MT_CC_CONNECT),
OSMO_VALUE_STRING(GSM48_MT_CC_CONNECT_ACK),
OSMO_VALUE_STRING(GSM48_MT_CC_EMERG_SETUP),
OSMO_VALUE_STRING(GSM48_MT_CC_PROGRESS),
OSMO_VALUE_STRING(GSM48_MT_CC_ESTAB),
OSMO_VALUE_STRING(GSM48_MT_CC_ESTAB_CONF),
OSMO_VALUE_STRING(GSM48_MT_CC_RECALL),
OSMO_VALUE_STRING(GSM48_MT_CC_START_CC),
OSMO_VALUE_STRING(GSM48_MT_CC_SETUP),
OSMO_VALUE_STRING(GSM48_MT_CC_MODIFY),
OSMO_VALUE_STRING(GSM48_MT_CC_MODIFY_COMPL),
OSMO_VALUE_STRING(GSM48_MT_CC_MODIFY_REJECT),
OSMO_VALUE_STRING(GSM48_MT_CC_USER_INFO),
OSMO_VALUE_STRING(GSM48_MT_CC_HOLD),
OSMO_VALUE_STRING(GSM48_MT_CC_HOLD_ACK),
OSMO_VALUE_STRING(GSM48_MT_CC_HOLD_REJ),
OSMO_VALUE_STRING(GSM48_MT_CC_RETR),
OSMO_VALUE_STRING(GSM48_MT_CC_RETR_ACK),
OSMO_VALUE_STRING(GSM48_MT_CC_RETR_REJ),
OSMO_VALUE_STRING(GSM48_MT_CC_DISCONNECT),
OSMO_VALUE_STRING(GSM48_MT_CC_RELEASE),
OSMO_VALUE_STRING(GSM48_MT_CC_RELEASE_COMPL),
OSMO_VALUE_STRING(GSM48_MT_CC_CONG_CTRL),
OSMO_VALUE_STRING(GSM48_MT_CC_NOTIFY),
OSMO_VALUE_STRING(GSM48_MT_CC_STATUS),
OSMO_VALUE_STRING(GSM48_MT_CC_STATUS_ENQ),
OSMO_VALUE_STRING(GSM48_MT_CC_START_DTMF),
OSMO_VALUE_STRING(GSM48_MT_CC_STOP_DTMF),
OSMO_VALUE_STRING(GSM48_MT_CC_STOP_DTMF_ACK),
OSMO_VALUE_STRING(GSM48_MT_CC_START_DTMF_ACK),
OSMO_VALUE_STRING(GSM48_MT_CC_START_DTMF_REJ),
OSMO_VALUE_STRING(GSM48_MT_CC_FACILITY),
{ 0, NULL }
};
/*! /brief Compose a string naming the message type for given protocol.
* If the message type string is known, return the message type name, otherwise
* return "<protocol discriminator name>:<message type in hex>".
* /param pdisc[in] protocol discriminator like GSM48_PDISC_MM
* /param msg_type[in] message type like GSM48_MT_MM_LOC_UPD_REQUEST
* /returns statically allocated string or string constant.
*/
const char *gsm48_pdisc_msgtype_name(uint8_t pdisc, uint8_t msg_type)
{
static char namebuf[64];
const struct value_string *msgt_names;
switch (pdisc) {
case GSM48_PDISC_RR:
msgt_names = gsm48_rr_msgtype_names;
break;
case GSM48_PDISC_MM:
msgt_names = gsm48_mm_msgtype_names;
break;
case GSM48_PDISC_CC:
msgt_names = gsm48_cc_msgtype_names;
break;
default:
msgt_names = NULL;
break;
}
if (msgt_names)
return get_value_string(msgt_names, msg_type);
snprintf(namebuf, sizeof(namebuf), "%s:0x%02x",
gsm48_pdisc_name(pdisc), msg_type);
return namebuf;
}
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