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osmocom-bb/src/host/layer23/src/mobile/mnccms.c

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/*
* (C) 2010 by Andreas Eversberg <jolly@eversberg.eu>
*
* 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.
*
*/
#include <stdint.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <osmocom/core/talloc.h>
#include <osmocom/gsm/protocol/gsm_04_08.h>
#include <osmocom/bb/common/logging.h>
#include <osmocom/bb/common/osmocom_data.h>
#include <osmocom/bb/common/ms.h>
#include <osmocom/bb/common/settings.h>
#include <osmocom/bb/mobile/mncc.h>
#include <osmocom/bb/mobile/mncc_ms.h>
#include <osmocom/bb/mobile/vty.h>
static uint32_t new_callref = 1;
static LLIST_HEAD(call_list);
static const char * const gsm_call_type_str[] = {
[GSM_CALL_T_UNKNOWN] = "unknown",
[GSM_CALL_T_VOICE] = "voice",
[GSM_CALL_T_DATA] = "data",
[GSM_CALL_T_DATA_FAX] = "fax",
};
static int dtmf_statemachine(struct gsm_call *call,
const struct gsm_mncc *mncc);
static void timeout_dtmf(void *arg);
/*
* support functions
*/
/* DTMF timer */
static void start_dtmf_timer(struct gsm_call *call, uint16_t ms)
{
LOGP(DCC, LOGL_INFO, "starting DTMF timer %d ms\n", ms);
call->dtmf_timer.cb = timeout_dtmf;
call->dtmf_timer.data = call;
osmo_timer_schedule(&call->dtmf_timer, 0, ms * 1000);
}
static void stop_dtmf_timer(struct gsm_call *call)
{
if (osmo_timer_pending(&call->dtmf_timer)) {
LOGP(DCC, LOGL_INFO, "stopping pending DTMF timer\n");
osmo_timer_del(&call->dtmf_timer);
}
}
/* free call instance */
static void free_call(struct gsm_call *call)
{
stop_dtmf_timer(call);
llist_del(&call->entry);
DEBUGP(DMNCC, "(call %x) Call removed.\n", call->callref);
talloc_free(call);
}
struct gsm_call *get_call_ref(uint32_t callref)
{
struct gsm_call *callt;
llist_for_each_entry(callt, &call_list, entry) {
if (callt->callref == callref)
return callt;
}
return NULL;
}
static int8_t mncc_get_bearer(const struct gsm_settings *set, uint8_t speech_ver)
{
switch (speech_ver) {
case GSM48_BCAP_SV_AMR_F:
if (set->full_v3)
LOGP(DMNCC, LOGL_INFO, " net suggests full rate v3\n");
else {
LOGP(DMNCC, LOGL_INFO, " full rate v3 not supported\n");
return -1;
}
break;
case GSM48_BCAP_SV_EFR:
if (set->full_v2)
LOGP(DMNCC, LOGL_INFO, " net suggests full rate v2\n");
else {
LOGP(DMNCC, LOGL_INFO, " full rate v2 not supported\n");
return -1;
}
break;
case GSM48_BCAP_SV_FR: /* mandatory */
if (set->full_v1)
LOGP(DMNCC, LOGL_INFO, " net suggests full rate v1\n");
else {
LOGP(DMNCC, LOGL_INFO, " full rate v1 not supported\n");
return -1;
}
break;
case GSM48_BCAP_SV_AMR_H:
if (set->half_v3)
LOGP(DMNCC, LOGL_INFO, " net suggests half rate v3\n");
else {
LOGP(DMNCC, LOGL_INFO, " half rate v3 not supported\n");
return -1;
}
break;
case GSM48_BCAP_SV_HR:
if (set->half_v1)
LOGP(DMNCC, LOGL_INFO, " net suggests half rate v1\n");
else {
LOGP(DMNCC, LOGL_INFO, " half rate v1 not supported\n");
return -1;
}
break;
default:
LOGP(DMNCC, LOGL_INFO, " net suggests unknown speech version "
"%d\n", speech_ver);
return -1;
}
return speech_ver;
}
static void mncc_set_bcap_speech(struct gsm_mncc *mncc,
const struct gsm_settings *set,
int speech_ver)
{
int i = 0;
mncc->fields |= MNCC_F_BEARER_CAP;
mncc->bearer_cap.coding = GSM48_BCAP_CODING_GSM_STD;
if (set->ch_cap == GSM_CAP_SDCCH_TCHF_TCHH
&& (set->half_v1 || set->half_v3)) {
mncc->bearer_cap.radio = GSM48_BCAP_RRQ_DUAL_FR;
LOGP(DMNCC, LOGL_INFO, " support TCH/H also\n");
} else {
mncc->bearer_cap.radio = GSM48_BCAP_RRQ_FR_ONLY;
LOGP(DMNCC, LOGL_INFO, " support TCH/F only\n");
}
mncc->bearer_cap.speech_ctm = 0;
/* if no specific speech_ver is given */
if (speech_ver < 0) {
/* if half rate is supported and preferred */
if (set->half_v3 && set->half && set->half_prefer) {
mncc->bearer_cap.speech_ver[i++] = GSM48_BCAP_SV_AMR_H;
LOGP(DMNCC, LOGL_INFO, " support half rate v3\n");
}
if (set->half_v1 && set->half && set->half_prefer) {
mncc->bearer_cap.speech_ver[i++] = GSM48_BCAP_SV_HR;
LOGP(DMNCC, LOGL_INFO, " support half rate v1\n");
}
/* if full rate is supported */
if (set->full_v3) {
mncc->bearer_cap.speech_ver[i++] = GSM48_BCAP_SV_AMR_F;
LOGP(DMNCC, LOGL_INFO, " support full rate v3\n");
}
if (set->full_v2) {
mncc->bearer_cap.speech_ver[i++] = GSM48_BCAP_SV_EFR;
LOGP(DMNCC, LOGL_INFO, " support full rate v2\n");
}
if (set->full_v1) { /* mandatory, so it's always true */
mncc->bearer_cap.speech_ver[i++] = GSM48_BCAP_SV_FR;
LOGP(DMNCC, LOGL_INFO, " support full rate v1\n");
}
/* if half rate is supported and not preferred */
if (set->half_v3 && set->half && !set->half_prefer) {
mncc->bearer_cap.speech_ver[i++] = GSM48_BCAP_SV_AMR_H;
LOGP(DMNCC, LOGL_INFO, " support half rate v3\n");
}
if (set->half_v1 && set->half && !set->half_prefer) {
mncc->bearer_cap.speech_ver[i++] = GSM48_BCAP_SV_HR;
LOGP(DMNCC, LOGL_INFO, " support half rate v1\n");
}
/* if specific speech_ver is given (it must be supported) */
} else
mncc->bearer_cap.speech_ver[i++] = speech_ver;
mncc->bearer_cap.speech_ver[i] = -1; /* end of list */
mncc->bearer_cap.transfer = GSM48_BCAP_ITCAP_SPEECH;
mncc->bearer_cap.mode = GSM48_BCAP_TMOD_CIRCUIT;
}
static void mncc_set_bcap_data(struct gsm_mncc *mncc,
const struct gsm_settings *set,
enum gsm_call_type call_type)
{
const struct data_call_params *cp = &set->call_params.data;
struct gsm_mncc_bearer_cap *bcap = &mncc->bearer_cap;
mncc->fields |= MNCC_F_BEARER_CAP;
*bcap = (struct gsm_mncc_bearer_cap) {
/* .transfer is set below */
.mode = GSM48_BCAP_TMOD_CIRCUIT,
.coding = GSM48_BCAP_CODING_GSM_STD,
/* .radio is set below */
.data = {
/* TODO: make these fields configurable via *set */
.rate_adaption = GSM48_BCAP_RA_V110_X30,
.sig_access = GSM48_BCAP_SA_I440_I450,
.async = 1,
/* .transp is set below */
.nr_data_bits = 8,
.parity = GSM48_BCAP_PAR_NONE,
.nr_stop_bits = 1,
/* .user_rate is set below */
/* .interm_rate is set below */
},
};
/* Radio channel requirement (octet 3) */
if (set->ch_cap == GSM_CAP_SDCCH_TCHF_TCHH) {
if (set->half_prefer)
bcap->radio = GSM48_BCAP_RRQ_DUAL_HR;
else
bcap->radio = GSM48_BCAP_RRQ_DUAL_FR;
LOGP(DMNCC, LOGL_INFO, " support TCH/H also\n");
} else {
bcap->radio = GSM48_BCAP_RRQ_FR_ONLY;
LOGP(DMNCC, LOGL_INFO, " support TCH/F only\n");
}
/* Information transfer capability (octet 3) */
switch (call_type) {
case GSM_CALL_T_DATA:
if (cp->type == DATA_CALL_TYPE_ISDN)
bcap->transfer = GSM_MNCC_BCAP_UNR_DIG;
else /* == DATA_CALL_TYPE_ANALOG */
bcap->transfer = GSM_MNCC_BCAP_AUDIO;
break;
case GSM_CALL_T_DATA_FAX:
bcap->transfer = GSM_MNCC_BCAP_FAX_G3;
break;
case GSM_CALL_T_VOICE:
default: /* shall not happen */
OSMO_ASSERT(0);
}
/* User rate (octet 6a) */
switch (cp->rate) {
case DATA_CALL_RATE_V110_300:
bcap->data.user_rate = GSM48_BCAP_UR_300;
bcap->data.interm_rate = GSM48_BCAP_IR_8k;
break;
case DATA_CALL_RATE_V110_1200:
bcap->data.user_rate = GSM48_BCAP_UR_1200;
bcap->data.interm_rate = GSM48_BCAP_IR_8k;
break;
case DATA_CALL_RATE_V110_2400:
bcap->data.user_rate = GSM48_BCAP_UR_2400;
bcap->data.interm_rate = GSM48_BCAP_IR_8k;
break;
case DATA_CALL_RATE_V110_4800:
bcap->data.user_rate = GSM48_BCAP_UR_4800;
bcap->data.interm_rate = GSM48_BCAP_IR_8k;
break;
case DATA_CALL_RATE_V110_9600:
bcap->data.user_rate = GSM48_BCAP_UR_9600;
bcap->data.interm_rate = GSM48_BCAP_IR_16k;
break;
case DATA_CALL_RATE_V110_14400: /* TODO: the bcap encoder does not support 14400 bps */
LOGP(DMNCC, LOGL_INFO, " support for 14400 bps is incomplete\n");
bcap->data.user_rate = GSM48_BCAP_UR_9600;
bcap->data.interm_rate = GSM48_BCAP_IR_16k;
break;
}
/* Connection element (octet 6c) */
switch (cp->ce) {
case DATA_CALL_CE_TRANSP:
bcap->data.transp = GSM48_BCAP_TR_TRANSP;
break;
case DATA_CALL_CE_TRANSP_PREF:
bcap->data.transp = GSM48_BCAP_TR_TR_PREF;
break;
case DATA_CALL_CE_NON_TRANSP:
bcap->data.transp = GSM48_BCAP_TR_RLP;
break;
case DATA_CALL_CE_NON_TRANSP_PREF:
bcap->data.transp = GSM48_BCAP_TR_RLP_PREF;
break;
}
/* FAX calls are special (see 3GPP TS 24.008, Annex D.3) */
if (call_type == GSM_CALL_T_DATA_FAX) {
bcap->data.rate_adaption = GSM48_BCAP_RA_NONE;
bcap->data.async = 0; /* shall be sync */
bcap->data.transp = GSM48_BCAP_TR_TRANSP;
bcap->data.modem_type = GSM48_BCAP_MT_NONE;
}
}
/* Check the given Bearer Capability, select first supported speech codec version.
* The choice between half-rate and full-rate is made based on current settings.
* Return a selected codec or -1 if no speech codec was selected. */
static int mncc_handle_bcap_speech(const struct gsm_mncc_bearer_cap *bcap,
const struct gsm_settings *set)
{
int speech_ver_half = -1;
int speech_ver = -1;
for (unsigned int i = 0; bcap->speech_ver[i] >= 0; i++) {
int temp = mncc_get_bearer(set, bcap->speech_ver[i]);
switch (temp) {
case GSM48_BCAP_SV_AMR_H:
case GSM48_BCAP_SV_HR:
/* only the first half rate */
if (speech_ver_half < 0)
speech_ver_half = temp;
break;
default:
if (temp < 0)
continue;
/* only the first full rate */
if (speech_ver < 0)
speech_ver = temp;
break;
}
}
/* half and full given */
if (speech_ver_half >= 0 && speech_ver >= 0) {
if (set->half_prefer) {
LOGP(DMNCC, LOGL_INFO, " both supported"
" codec rates are given, using "
"preferred half rate\n");
speech_ver = speech_ver_half;
} else {
LOGP(DMNCC, LOGL_INFO, " both supported"
" codec rates are given, using "
"preferred full rate\n");
}
} else if (speech_ver_half < 0 && speech_ver < 0) {
LOGP(DMNCC, LOGL_INFO, " no supported codec "
"rate is given\n");
/* only half rate is given, use it */
} else if (speech_ver_half >= 0) {
LOGP(DMNCC, LOGL_INFO, " only supported half "
"rate codec is given, using it\n");
speech_ver = speech_ver_half;
/* only full rate is given, use it */
} else {
LOGP(DMNCC, LOGL_INFO, " only supported full "
"rate codec is given, using it\n");
}
return speech_ver;
}
/* Check the given Bearer Capability for a data call (CSD).
* Return 0 if the bearer is accepted, otherwise return -1. */
static int mncc_handle_bcap_data(const struct gsm_mncc_bearer_cap *bcap,
const struct gsm_settings *set)
{
if (bcap->data.rate_adaption != GSM48_BCAP_RA_V110_X30) {
LOGP(DMNCC, LOGL_ERROR,
"%s(): Rate adaption (octet 5) 0x%02x is not supported\n",
__func__, bcap->data.rate_adaption);
return -ENOTSUP;
}
if (bcap->data.sig_access != GSM48_BCAP_SA_I440_I450) {
LOGP(DMNCC, LOGL_ERROR,
"%s(): Signalling access protocol (octet 5) 0x%02x is not supported\n",
__func__, bcap->data.sig_access);
return -ENOTSUP;
}
#define BCAP_RATE(interm_rate, user_rate) \
((interm_rate << 8) | (user_rate << 0))
switch (BCAP_RATE(bcap->data.interm_rate, bcap->data.user_rate)) {
case BCAP_RATE(GSM48_BCAP_IR_8k, GSM48_BCAP_UR_300):
case BCAP_RATE(GSM48_BCAP_IR_8k, GSM48_BCAP_UR_1200):
case BCAP_RATE(GSM48_BCAP_IR_8k, GSM48_BCAP_UR_2400):
if (bcap->data.transp != GSM48_BCAP_TR_TRANSP) {
LOGP(DMNCC, LOGL_ERROR,
"%s(): wrong user-rate 0x%02x for a non-transparent call\n",
__func__, bcap->data.user_rate);
return -EINVAL;
}
/* fall-through */
case BCAP_RATE(GSM48_BCAP_IR_8k, GSM48_BCAP_UR_4800):
case BCAP_RATE(GSM48_BCAP_IR_16k, GSM48_BCAP_UR_9600):
if (bcap->data.transp != GSM48_BCAP_TR_TRANSP) {
LOGP(DMNCC, LOGL_ERROR,
"%s(): only transparent calls are supported so far\n",
__func__);
return -ENOTSUP;
}
break;
default:
LOGP(DMNCC, LOGL_ERROR,
"%s(): User rate 0x%02x (octets 6a) is not supported (IR=0x%02x)\n",
__func__, bcap->data.user_rate, bcap->data.interm_rate);
return -ENOTSUP;
}
#undef BCAP_RATE
return 0;
}
static int mncc_handle_bcap(struct gsm_mncc *mncc_out, /* CC Call Confirmed */
const struct gsm_mncc *mncc_in, /* CC Setup */
const struct gsm_settings *set)
{
const struct gsm_mncc_bearer_cap *bcap = &mncc_in->bearer_cap;
/* 3GPP TS 24.008, section 9.3.2.2 defines several cases in which the
* Bearer Capability 1 IE is to be included, provided that at least
* one of these conditions is met. */
/* if the Bearer Capability 1 IE is not present */
if (~mncc_in->fields & MNCC_F_BEARER_CAP) {
/* ... include our own Bearer Capability, assuming a speech call */
mncc_set_bcap_speech(mncc_out, set, -1);
return 0;
}
if (bcap->mode != GSM48_BCAP_TMOD_CIRCUIT) {
LOGP(DMNCC, LOGL_ERROR,
"%s(): Transfer mode 0x%02x is not supported\n",
__func__, bcap->mode);
return -ENOTSUP;
}
if (bcap->coding != GSM48_BCAP_CODING_GSM_STD) {
LOGP(DMNCC, LOGL_ERROR,
"%s(): Coding standard 0x%02x is not supported\n",
__func__, bcap->coding);
return -ENOTSUP;
}
switch (bcap->transfer) {
case GSM48_BCAP_ITCAP_SPEECH:
{
int speech_ver = mncc_handle_bcap_speech(bcap, set);
/* include bearer cap, if not given in setup (see above)
* or if multiple codecs are given
* or if not only full rate
* or if given codec is unimplemented
*/
if (speech_ver < 0)
mncc_set_bcap_speech(mncc_out, set, -1);
else if (bcap->speech_ver[1] >= 0 || speech_ver != 0)
mncc_set_bcap_speech(mncc_out, set, speech_ver);
break;
}
case GSM48_BCAP_ITCAP_UNR_DIG_INF:
case GSM48_BCAP_ITCAP_3k1_AUDIO:
case GSM48_BCAP_ITCAP_FAX_G3:
return mncc_handle_bcap_data(bcap, set);
default:
LOGP(DMNCC, LOGL_ERROR,
"%s(): Information transfer capability 0x%02x is not supported\n",
__func__, bcap->transfer);
return -ENOTSUP;
}
return 0;
}
/*
* MNCCms dummy application
*/
/* this is a minimal implementation as required by GSM 04.08 */
int mncc_recv_dummy(struct osmocom_ms *ms, int msg_type, void *arg)
{
struct gsm_mncc *data = arg;
uint32_t callref = data->callref;
struct gsm_mncc rel;
if (msg_type == MNCC_REL_IND || msg_type == MNCC_REL_CNF)
return 0;
LOGP(DMNCC, LOGL_INFO, "Rejecting incoming call\n");
/* reject, as we don't support Calls */
memset(&rel, 0, sizeof(struct gsm_mncc));
rel.callref = callref;
mncc_set_cause(&rel, GSM48_CAUSE_LOC_USER,
GSM48_CC_CAUSE_INCOMPAT_DEST);
return mncc_tx_to_cc(ms, MNCC_REL_REQ, &rel);
}
/*
* MNCCms call application via socket
*/
int mncc_recv_external(struct osmocom_ms *ms, int msg_type, void *arg)
{
struct mncc_sock_state *state = ms->mncc_entity.sock_state;
struct gsm_mncc *mncc = arg;
struct msgb *msg;
unsigned char *data;
if (!state) {
if (msg_type != MNCC_REL_IND && msg_type != MNCC_REL_CNF) {
struct gsm_mncc rel;
/* reject */
memset(&rel, 0, sizeof(struct gsm_mncc));
rel.callref = mncc->callref;
mncc_set_cause(&rel, GSM48_CAUSE_LOC_USER,
GSM48_CC_CAUSE_TEMP_FAILURE);
return mncc_tx_to_cc(ms, MNCC_REL_REQ, &rel);
}
return 0;
}
mncc->msg_type = msg_type;
msg = msgb_alloc(sizeof(struct gsm_mncc), "MNCC");
if (!msg)
return -ENOMEM;
data = msgb_put(msg, sizeof(struct gsm_mncc));
memcpy(data, mncc, sizeof(struct gsm_mncc));
return mncc_sock_from_cc(state, msg);
}
/*
* MNCCms basic call application
*/
int mncc_recv_internal(struct osmocom_ms *ms, int msg_type, void *arg)
{
const struct gsm_settings *set = &ms->settings;
const struct gsm_mncc *data = arg;
struct gsm_call *call = get_call_ref(data->callref);
struct gsm_mncc mncc;
uint8_t cause;
int first_call = 0;
/* call does not exist */
if (!call && msg_type != MNCC_SETUP_IND) {
LOGP(DMNCC, LOGL_INFO, "Rejecting incoming call "
"(callref %x)\n", data->callref);
if (msg_type == MNCC_REL_IND || msg_type == MNCC_REL_CNF)
return 0;
cause = GSM48_CC_CAUSE_INCOMPAT_DEST;
release:
memset(&mncc, 0, sizeof(struct gsm_mncc));
mncc.callref = data->callref;
mncc_set_cause(&mncc, GSM48_CAUSE_LOC_USER, cause);
return mncc_tx_to_cc(ms, MNCC_REL_REQ, &mncc);
}
/* setup without call */
if (!call) {
if (llist_empty(&call_list))
first_call = 1;
call = talloc_zero(ms, struct gsm_call);
if (!call)
return -ENOMEM;
call->ms = ms;
call->callref = data->callref;
call->type = GSM_CALL_T_UNKNOWN;
llist_add_tail(&call->entry, &call_list);
}
/* not in initiated state anymore */
call->init = false;
switch (msg_type) {
case MNCC_DISC_IND:
l23_vty_ms_notify(ms, NULL);
switch (data->cause.value) {
case GSM48_CC_CAUSE_UNASSIGNED_NR:
l23_vty_ms_notify(ms, "Call: Number not assigned\n");
break;
case GSM48_CC_CAUSE_NO_ROUTE:
l23_vty_ms_notify(ms, "Call: Destination unreachable\n");
break;
case GSM48_CC_CAUSE_NORM_CALL_CLEAR:
l23_vty_ms_notify(ms, "Call: Remote hangs up\n");
break;
case GSM48_CC_CAUSE_USER_BUSY:
l23_vty_ms_notify(ms, "Call: Remote busy\n");
break;
case GSM48_CC_CAUSE_USER_NOTRESPOND:
l23_vty_ms_notify(ms, "Call: Remote not responding\n");
break;
case GSM48_CC_CAUSE_USER_ALERTING_NA:
l23_vty_ms_notify(ms, "Call: Remote not answering\n");
break;
case GSM48_CC_CAUSE_CALL_REJECTED:
l23_vty_ms_notify(ms, "Call has been rejected\n");
break;
case GSM48_CC_CAUSE_NUMBER_CHANGED:
l23_vty_ms_notify(ms, "Call: Number changed\n");
break;
case GSM48_CC_CAUSE_PRE_EMPTION:
l23_vty_ms_notify(ms, "Call: Cleared due to pre-emption\n");
break;
case GSM48_CC_CAUSE_DEST_OOO:
l23_vty_ms_notify(ms, "Call: Remote out of order\n");
break;
case GSM48_CC_CAUSE_INV_NR_FORMAT:
l23_vty_ms_notify(ms, "Call: Number invalid or incomplete\n");
break;
case GSM48_CC_CAUSE_NO_CIRCUIT_CHAN:
l23_vty_ms_notify(ms, "Call: No channel available\n");
break;
case GSM48_CC_CAUSE_NETWORK_OOO:
l23_vty_ms_notify(ms, "Call: Network out of order\n");
break;
case GSM48_CC_CAUSE_TEMP_FAILURE:
l23_vty_ms_notify(ms, "Call: Temporary failure\n");
break;
case GSM48_CC_CAUSE_SWITCH_CONG:
l23_vty_ms_notify(ms, "Congestion\n");
break;
default:
l23_vty_ms_notify(ms, "Call has been disconnected "
"(clear cause %d)\n", data->cause.value);
}
LOGP(DMNCC, LOGL_INFO, "Call has been disconnected "
"(cause %d)\n", data->cause.value);
if ((data->fields & MNCC_F_PROGRESS)
&& data->progress.descr == 8) {
l23_vty_ms_notify(ms, "Please hang up!\n");
break;
}
free_call(call);
cause = GSM48_CC_CAUSE_NORM_CALL_CLEAR;
goto release;
case MNCC_REL_IND:
case MNCC_REL_CNF:
l23_vty_ms_notify(ms, NULL);
if (data->cause.value == GSM48_CC_CAUSE_CALL_REJECTED)
l23_vty_ms_notify(ms, "Call has been rejected\n");
else
l23_vty_ms_notify(ms, "Call has been released\n");
LOGP(DMNCC, LOGL_INFO, "Call has been released (cause %d)\n",
data->cause.value);
free_call(call);
break;
case MNCC_CALL_PROC_IND:
l23_vty_ms_notify(ms, NULL);
l23_vty_ms_notify(ms, "Call is proceeding\n");
LOGP(DMNCC, LOGL_INFO, "Call is proceeding\n");
if ((data->fields & MNCC_F_BEARER_CAP)
&& data->bearer_cap.speech_ver[0] >= 0) {
mncc_get_bearer(set, data->bearer_cap.speech_ver[0]);
}
break;
case MNCC_ALERT_IND:
l23_vty_ms_notify(ms, NULL);
l23_vty_ms_notify(ms, "Call is alerting\n");
LOGP(DMNCC, LOGL_INFO, "Call is alerting\n");
break;
case MNCC_SETUP_CNF:
l23_vty_ms_notify(ms, NULL);
l23_vty_ms_notify(ms, "Call is answered\n");
LOGP(DMNCC, LOGL_INFO, "Call is answered\n");
break;
case MNCC_SETUP_IND:
l23_vty_ms_notify(ms, NULL);
if (!first_call && !ms->settings.cw) {
l23_vty_ms_notify(ms, "Incoming call rejected while busy\n");
LOGP(DMNCC, LOGL_INFO, "Incoming call but busy\n");
cause = GSM48_CC_CAUSE_USER_BUSY;
goto release;
}
/* presentation allowed if present == 0 */
if (data->calling.present || !data->calling.number[0])
l23_vty_ms_notify(ms, "Incoming call (anonymous)\n");
else if (data->calling.type == 1)
l23_vty_ms_notify(ms, "Incoming call (from +%s)\n",
data->calling.number);
else if (data->calling.type == 2)
l23_vty_ms_notify(ms, "Incoming call (from 0-%s)\n",
data->calling.number);
else
l23_vty_ms_notify(ms, "Incoming call (from %s)\n",
data->calling.number);
LOGP(DMNCC, LOGL_INFO, "Incoming call (from %s callref %x)\n",
data->calling.number, call->callref);
memset(&mncc, 0, sizeof(struct gsm_mncc));
mncc.callref = call->callref;
/* Bearer capability (optional) */
if (mncc_handle_bcap(&mncc, data, &ms->settings) != 0) {
cause = GSM48_CC_CAUSE_INCOMPAT_DEST;
goto release;
}
switch (mncc.bearer_cap.transfer) {
case GSM48_BCAP_ITCAP_SPEECH:
call->type = GSM_CALL_T_VOICE;
break;
case GSM48_BCAP_ITCAP_UNR_DIG_INF:
case GSM48_BCAP_ITCAP_3k1_AUDIO:
call->type = GSM_CALL_T_DATA;
break;
case GSM48_BCAP_ITCAP_FAX_G3:
call->type = GSM_CALL_T_DATA_FAX;
break;
default:
call->type = GSM_CALL_T_UNKNOWN;
break;
}
/* CC capabilities (optional) */
if (ms->settings.cc_dtmf) {
mncc.fields |= MNCC_F_CCCAP;
mncc.cccap.dtmf = 1;
}
mncc_tx_to_cc(ms, MNCC_CALL_CONF_REQ, &mncc);
if (first_call)
LOGP(DMNCC, LOGL_INFO, "Ring!\n");
else {
LOGP(DMNCC, LOGL_INFO, "Knock!\n");
call->hold = true;
}
call->ring = true;
memset(&mncc, 0, sizeof(struct gsm_mncc));
mncc.callref = call->callref;
mncc_tx_to_cc(ms, MNCC_ALERT_REQ, &mncc);
if (ms->settings.auto_answer) {
LOGP(DMNCC, LOGL_INFO, "Auto-answering call\n");
mncc_answer(ms);
}
break;
case MNCC_SETUP_COMPL_IND:
l23_vty_ms_notify(ms, NULL);
l23_vty_ms_notify(ms, "Call is connected\n");
LOGP(DMNCC, LOGL_INFO, "Call is connected\n");
break;
case MNCC_HOLD_CNF:
l23_vty_ms_notify(ms, NULL);
l23_vty_ms_notify(ms, "Call is on hold\n");
LOGP(DMNCC, LOGL_INFO, "Call is on hold\n");
call->hold = true;
break;
case MNCC_HOLD_REJ:
l23_vty_ms_notify(ms, NULL);
l23_vty_ms_notify(ms, "Call hold was rejected\n");
LOGP(DMNCC, LOGL_INFO, "Call hold was rejected\n");
break;
case MNCC_RETRIEVE_CNF:
l23_vty_ms_notify(ms, NULL);
l23_vty_ms_notify(ms, "Call is retrieved\n");
LOGP(DMNCC, LOGL_INFO, "Call is retrieved\n");
call->hold = false;
break;
case MNCC_RETRIEVE_REJ:
l23_vty_ms_notify(ms, NULL);
l23_vty_ms_notify(ms, "Call retrieve was rejected\n");
LOGP(DMNCC, LOGL_INFO, "Call retrieve was rejected\n");
break;
case MNCC_FACILITY_IND:
LOGP(DMNCC, LOGL_INFO, "Facility info not displayed, "
"unsupported\n");
break;
case MNCC_START_DTMF_RSP:
case MNCC_START_DTMF_REJ:
case MNCC_STOP_DTMF_RSP:
dtmf_statemachine(call, data);
break;
default:
LOGP(DMNCC, LOGL_INFO, "Message 0x%02x unsupported\n",
msg_type);
return -EINVAL;
}
return 0;
}
int mncc_call(struct osmocom_ms *ms, const char *number,
enum gsm_call_type call_type)
{
struct gsm_call *call;
struct gsm_mncc setup;
llist_for_each_entry(call, &call_list, entry) {
if (!call->hold) {
l23_vty_ms_notify(ms, NULL);
l23_vty_ms_notify(ms, "Please put active call on hold "
"first!\n");
LOGP(DMNCC, LOGL_INFO, "Cannot make a call, busy!\n");
return -EBUSY;
}
}
call = talloc_zero(ms, struct gsm_call);
if (!call)
return -ENOMEM;
call->ms = ms;
call->callref = new_callref++;
call->type = call_type;
call->init = true;
llist_add_tail(&call->entry, &call_list);
memset(&setup, 0, sizeof(struct gsm_mncc));
setup.callref = call->callref;
if (!strncasecmp(number, "emerg", 5)) {
LOGP(DMNCC, LOGL_INFO, "Make emergency call\n");
/* emergency */
setup.emergency = 1;
} else {
LOGP(DMNCC, LOGL_INFO, "Make %s call to %s\n",
gsm_call_type_str[call_type], number);
/* called number */
setup.fields |= MNCC_F_CALLED;
if (number[0] == '+') {
number++;
setup.called.type = 1; /* international */
} else
setup.called.type = 0; /* auto/unknown - prefix must be
used */
setup.called.plan = 1; /* ISDN */
OSMO_STRLCPY_ARRAY(setup.called.number, number);
/* bearer capability (mandatory) */
if (call_type == GSM_CALL_T_VOICE)
mncc_set_bcap_speech(&setup, &ms->settings, -1);
else
mncc_set_bcap_data(&setup, &ms->settings, call_type);
/* CLIR */
if (ms->settings.clir)
setup.clir.inv = 1;
else if (ms->settings.clip)
setup.clir.sup = 1;
/* CC capabilities (optional) */
if (ms->settings.cc_dtmf) {
setup.fields |= MNCC_F_CCCAP;
setup.cccap.dtmf = 1;
}
}
return mncc_tx_to_cc(ms, MNCC_SETUP_REQ, &setup);
}
int mncc_hangup(struct osmocom_ms *ms)
{
struct gsm_call *call, *found = NULL;
struct gsm_mncc disc;
llist_for_each_entry(call, &call_list, entry) {
if (!call->hold) {
found = call;
break;
}
}
if (!found) {
LOGP(DMNCC, LOGL_INFO, "No active call to hangup\n");
l23_vty_ms_notify(ms, NULL);
l23_vty_ms_notify(ms, "No active call\n");
return -EINVAL;
}
memset(&disc, 0, sizeof(struct gsm_mncc));
disc.callref = found->callref;
mncc_set_cause(&disc, GSM48_CAUSE_LOC_USER,
GSM48_CC_CAUSE_NORM_CALL_CLEAR);
return mncc_tx_to_cc(ms, (call->init) ? MNCC_REL_REQ : MNCC_DISC_REQ,
&disc);
}
int mncc_answer(struct osmocom_ms *ms)
{
struct gsm_call *call, *alerting = NULL;
struct gsm_mncc rsp;
int active = 0;
llist_for_each_entry(call, &call_list, entry) {
if (call->ring)
alerting = call;
else if (!call->hold)
active = 1;
}
if (!alerting) {
LOGP(DMNCC, LOGL_INFO, "No call alerting\n");
l23_vty_ms_notify(ms, NULL);
l23_vty_ms_notify(ms, "No alerting call\n");
return -EBUSY;
}
if (active) {
LOGP(DMNCC, LOGL_INFO, "Answer but we have an active call\n");
l23_vty_ms_notify(ms, NULL);
l23_vty_ms_notify(ms, "Please put active call on hold first!\n");
return -EBUSY;
}
alerting->ring = false;
alerting->hold = false;
memset(&rsp, 0, sizeof(struct gsm_mncc));
rsp.callref = alerting->callref;
return mncc_tx_to_cc(ms, MNCC_SETUP_RSP, &rsp);
}
int mncc_hold(struct osmocom_ms *ms)
{
struct gsm_call *call, *found = NULL;
struct gsm_mncc hold;
llist_for_each_entry(call, &call_list, entry) {
if (!call->hold) {
found = call;
break;
}
}
if (!found) {
LOGP(DMNCC, LOGL_INFO, "No active call to hold\n");
l23_vty_ms_notify(ms, NULL);
l23_vty_ms_notify(ms, "No active call\n");
return -EINVAL;
}
memset(&hold, 0, sizeof(struct gsm_mncc));
hold.callref = found->callref;
return mncc_tx_to_cc(ms, MNCC_HOLD_REQ, &hold);
}
int mncc_retrieve(struct osmocom_ms *ms, int number)
{
struct gsm_call *call;
struct gsm_mncc retr;
int holdnum = 0, active = 0, i = 0;
llist_for_each_entry(call, &call_list, entry) {
if (call->hold)
holdnum++;
if (!call->hold)
active = 1;
}
if (active) {
LOGP(DMNCC, LOGL_INFO, "Cannot retrieve during active call\n");
l23_vty_ms_notify(ms, NULL);
l23_vty_ms_notify(ms, "Hold active call first!\n");
return -EINVAL;
}
if (holdnum == 0) {
l23_vty_ms_notify(ms, NULL);
l23_vty_ms_notify(ms, "No call on hold!\n");
return -EINVAL;
}
if (holdnum > 1 && number <= 0) {
l23_vty_ms_notify(ms, NULL);
l23_vty_ms_notify(ms, "Select call 1..%d\n", holdnum);
return -EINVAL;
}
if (holdnum == 1 && number <= 0)
number = 1;
if (number > holdnum) {
l23_vty_ms_notify(ms, NULL);
l23_vty_ms_notify(ms, "Given number %d out of range!\n", number);
l23_vty_ms_notify(ms, "Select call 1..%d\n", holdnum);
return -EINVAL;
}
llist_for_each_entry(call, &call_list, entry) {
i++;
if (i == number)
break;
}
memset(&retr, 0, sizeof(struct gsm_mncc));
retr.callref = call->callref;
return mncc_tx_to_cc(ms, MNCC_RETRIEVE_REQ, &retr);
}
/*
* DTMF
*/
static int dtmf_statemachine(struct gsm_call *call,
const struct gsm_mncc *mncc)
{
struct osmocom_ms *ms = call->ms;
struct gsm_mncc dtmf;
switch (call->dtmf_state) {
case DTMF_ST_SPACE:
case DTMF_ST_IDLE:
/* end of string */
if (!call->dtmf[call->dtmf_index]) {
LOGP(DMNCC, LOGL_INFO, "done with DTMF\n");
call->dtmf_state = DTMF_ST_IDLE;
return -EOF;
}
memset(&dtmf, 0, sizeof(struct gsm_mncc));
dtmf.callref = call->callref;
dtmf.keypad = call->dtmf[call->dtmf_index++];
call->dtmf_state = DTMF_ST_START;
LOGP(DMNCC, LOGL_INFO, "start DTMF (keypad %c)\n",
dtmf.keypad);
return mncc_tx_to_cc(ms, MNCC_START_DTMF_REQ, &dtmf);
case DTMF_ST_START:
if (mncc->msg_type != MNCC_START_DTMF_RSP) {
LOGP(DMNCC, LOGL_INFO, "DTMF was rejected\n");
return -ENOTSUP;
}
start_dtmf_timer(call, 70);
call->dtmf_state = DTMF_ST_MARK;
LOGP(DMNCC, LOGL_INFO, "DTMF is on\n");
break;
case DTMF_ST_MARK:
memset(&dtmf, 0, sizeof(struct gsm_mncc));
dtmf.callref = call->callref;
call->dtmf_state = DTMF_ST_STOP;
LOGP(DMNCC, LOGL_INFO, "stop DTMF\n");
return mncc_tx_to_cc(ms, MNCC_STOP_DTMF_REQ, &dtmf);
case DTMF_ST_STOP:
start_dtmf_timer(call, 120);
call->dtmf_state = DTMF_ST_SPACE;
LOGP(DMNCC, LOGL_INFO, "DTMF is off\n");
break;
}
return 0;
}
static void timeout_dtmf(void *arg)
{
struct gsm_call *call = arg;
LOGP(DCC, LOGL_INFO, "DTMF timer has fired\n");
dtmf_statemachine(call, NULL);
}
int mncc_dtmf(struct osmocom_ms *ms, char *dtmf)
{
struct gsm_call *call, *found = NULL;
llist_for_each_entry(call, &call_list, entry) {
if (!call->hold) {
found = call;
break;
}
}
if (!found) {
LOGP(DMNCC, LOGL_INFO, "No active call to send DTMF\n");
l23_vty_ms_notify(ms, NULL);
l23_vty_ms_notify(ms, "No active call\n");
return -EINVAL;
}
if (call->dtmf_state != DTMF_ST_IDLE) {
LOGP(DMNCC, LOGL_INFO, "sending DTMF already\n");
return -EINVAL;
}
call->dtmf_index = 0;
OSMO_STRLCPY_ARRAY(call->dtmf, dtmf);
return dtmf_statemachine(call, NULL);
}
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