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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) 2008-2009 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 <arpa/inet.h>
#include <osmocore/utils.h>
#include <osmocore/tlv.h>
#include <osmocore/gsm48.h>
#include <osmocore/protocol/gsm_04_08.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 */
},
};
static const char *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",
};
const char *cc_state_names[32] = {
"NULL",
"INITIATED",
"illegal state 2",
"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_msg_names[0x40] = {
"unknown 0x00",
"ALERTING",
"CALL_PROC",
"PROGRESS",
"ESTAB",
"SETUP",
"ESTAB_CONF",
"CONNECT",
"CALL_CONF",
"START_CC",
"unknown 0x0a",
"RECALL",
"unknown 0x0c",
"unknown 0x0d",
"EMERG_SETUP",
"CONNECT_ACK",
"USER_INFO",
"unknown 0x11",
"unknown 0x12",
"MODIFY_REJECT",
"unknown 0x14",
"unknown 0x15",
"unknown 0x16",
"MODIFY",
"HOLD",
"HOLD_ACK",
"HOLD_REJ",
"unknown 0x1b",
"RETR",
"RETR_ACK",
"RETR_REJ",
"MODIFY_COMPL",
"unknown 0x20",
"unknown 0x21",
"unknown 0x22",
"unknown 0x23",
"unknown 0x24",
"DISCONNECT",
"unknown 0x26",
"unknown 0x27",
"unknown 0x28",
"unknown 0x29",
"RELEASE_COMPL",
"unknown 0x2b",
"unknown 0x2c",
"RELEASE",
"unknown 0x2e",
"unknown 0x2f",
"unknown 0x30",
"STOP_DTMF",
"STOP_DTMF_ACK",
"unknown 0x33",
"STATUS_ENQ",
"START_DTMF",
"START_DTMF_ACK",
"START_DTMF_REJ",
"unknown 0x38",
"CONG_CTRL",
"FACILITY",
"unknown 0x3b",
"STATUS",
"unknown 0x3d",
"NOTIFY",
"unknown 0x3f",
};
static char strbuf[64];
const char *rr_cause_name(uint8_t cause)
{
if (cause < ARRAY_SIZE(rr_cause_names) &&
rr_cause_names[cause])
return rr_cause_names[cause];
snprintf(strbuf, sizeof(strbuf), "0x%02x", cause);
return strbuf;
}
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;
}
void gsm48_generate_lai(struct gsm48_loc_area_id *lai48, uint16_t mcc,
uint16_t mnc, uint16_t lac)
{
uint8_t bcd[3];
to_bcd(bcd, mcc);
lai48->digits[0] = bcd[0] | (bcd[1] << 4);
lai48->digits[1] = bcd[2];
to_bcd(bcd, mnc);
/* FIXME: do we need three-digit MNC? See Table 10.5.3 */
#if 0
lai48->digits[1] |= bcd[2] << 4;
lai48->digits[2] = bcd[0] | (bcd[1] << 4);
#else
lai48->digits[1] |= 0xf << 4;
lai48->digits[2] = bcd[1] | (bcd[2] << 4);
#endif
lai48->lac = htons(lac);
}
int gsm48_generate_mid_from_tmsi(uint8_t *buf, uint32_t tmsi)
{
uint32_t *tptr = (uint32_t *) &buf[3];
buf[0] = GSM48_IE_MOBILE_ID;
buf[1] = GSM48_TMSI_LEN;
buf[2] = 0xf0 | GSM_MI_TYPE_TMSI;
*tptr = htonl(tmsi);
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] = 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 = char2bcd(imsi[++off]);
if (!odd && off + 1 == length)
upper = 0x0f;
else
upper = char2bcd(imsi[++off]) & 0x0f;
buf[2 + i] = (upper << 4) | lower;
}
return 2 + buf[1];
}
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