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chan_dongle.c
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/*
* chan_dongle
*
* Copyright (C) 2011
* bg <[email protected]>
* http://www.e1550.mobi
*
* chan_dongle is based on chan_datacard by
*
* Artem Makhutov <[email protected]>
* http://www.makhutov.org
*
* Dmitry Vagin <[email protected]>
*
* Copyright (C) 2011
* bg <[email protected]>
* http://www.e1550.mobi
* chan_datacard is based on chan_mobile by Digium
* (Mark Spencer <[email protected]>)
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2. See the LICENSE file
* at the top of the source tree.
*/
/*! \file
*
* \brief UMTS Voice Dongle channel driver
*
* \author Artem Makhutov <[email protected]>
* \author Dave Bowerman <[email protected]>
* \author Dmitry Vagin <[email protected]>
* \author bg <[email protected]>
*
* \ingroup channel_drivers
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /* HAVE_CONFIG_H */
#include <asterisk.h>
ASTERISK_FILE_VERSION(__FILE__, "$Rev: " PACKAGE_REVISION " $")
#include <asterisk/stringfields.h> /* AST_DECLARE_STRING_FIELDS for asterisk/manager.h */
#include <asterisk/manager.h>
#include <asterisk/dsp.h>
#include <asterisk/callerid.h>
#include <asterisk/module.h> /* AST_MODULE_LOAD_DECLINE ... */
#include <asterisk/timing.h> /* ast_timer_open() ast_timer_fd() */
#include <sys/stat.h> /* S_IRUSR | S_IRGRP | S_IROTH */
#include <termios.h> /* struct termios tcgetattr() tcsetattr() */
#include <pthread.h> /* pthread_t pthread_kill() pthread_join() */
#include <fcntl.h> /* O_RDWR O_NOCTTY */
#include <signal.h> /* SIGURG */
#include "chan_dongle.h"
#include "at_response.h" /* at_res_t */
#include "at_queue.h" /* struct at_queue_task_cmd at_queue_head_cmd() */
#include "at_command.h" /* at_cmd2str() */
#include "mutils.h" /* ITEMS_OF() */
#include "at_read.h"
#include "cli.h"
#include "app.h"
#include "manager.h"
#include "channel.h" /* channel_queue_hangup() */
#include "dc_config.h" /* dc_uconfig_fill() dc_gconfig_fill() dc_sconfig_fill() */
#include "pdiscovery.h" /* pdiscovery_lookup() pdiscovery_init() pdiscovery_fini() */
EXPORT_DEF const char * const dev_state_strs[4] = { "stop", "restart", "remove", "start" };
EXPORT_DEF public_state_t * gpublic;
static int public_state_init(struct public_state * state);
/*!
* Get status of the dongle. It might happen that the device disappears
* (e.g. due to a USB unplug).
*
* \return 0 if device seems ok, non-0 if it seems not available
*/
static int port_status (int fd)
{
struct termios t;
if (fd < 0)
{
return -1;
}
return tcgetattr (fd, &t);
}
#/* return length of lockname */
static int lock_build(const char * devname, char * buf, unsigned length)
{
const char * basename;
char resolved_path[PATH_MAX];
/* follow symlinks */
if(realpath(devname, resolved_path) != NULL)
devname = resolved_path;
basename = strrchr(devname, '/');
if(basename)
basename++;
else
basename = devname;
/* NOTE: use system system wide lock directory */
return snprintf(buf, length, "/var/lock/LOCK..%s", basename);
}
#/* return 0 on error */
static int lock_create(const char * lockfile)
{
int fd;
int len = 0;
char pidb[21];
fd = open(lockfile, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IRGRP | S_IROTH);
if(fd >= 0)
{
/* NOTE: bg: i assume next open reuse same fd - not thread-safe */
len = snprintf(pidb, sizeof(pidb), "%d %d", getpid(), fd);
len = write(fd, pidb, len);
close(fd);
}
return len;
}
#/* return pid of owner, 0 if free */
EXPORT_DEF int lock_try(const char * devname, char ** lockname)
{
int fd;
int len;
int pid = 0;
int assigned;
int fd2;
char name[1024];
char buffer[65];
lock_build(devname, name, sizeof(name));
/* FIXME: rise conditions: some time between lock check and got lock */
fd = open(name, O_RDONLY);
if(fd >= 0)
{
len = read(fd, buffer, sizeof(buffer) - 1);
if(len > 0)
{
buffer[len] = 0;
assigned = sscanf(buffer, "%d %d", &len, &fd2);
if(assigned > 0 && kill(len, 0) == 0)
{
if(len == getpid() && assigned > 1)
{
if(port_status(fd2) == 0)
pid = len;
}
else
pid = len;
}
}
close(fd);
}
if(pid == 0)
{
unlink(name);
lock_create(name);
*lockname = ast_strdup(name);
}
return pid;
}
#/* */
EXPORT_DEF void closetty(int fd, char ** lockfname)
{
close(fd);
/* remove lock */
unlink(*lockfname);
ast_free(*lockfname);
*lockfname = NULL;
}
EXPORT_DEF int opentty (const char* dev, char ** lockfile)
{
int flags;
int pid;
int fd;
struct termios term_attr;
char buf[40];
pid = lock_try(dev, lockfile);
if(pid != 0)
{
ast_log (LOG_WARNING, "%s already used by process %d\n", dev, pid);
return -1;
}
fd = open (dev, O_RDWR | O_NOCTTY);
if (fd < 0)
{
flags = errno;
closetty(fd, lockfile);
snprintf(buf, sizeof(buf), "Open Failed\r\nErrorCode: %d", flags);
manager_event_message_raw("DonglePortFail", dev, buf);
ast_log (LOG_WARNING, "unable to open %s: %s\n", dev, strerror(flags));
return -1;
}
flags = fcntl(fd, F_GETFD);
if(flags == -1 || fcntl(fd, F_SETFD, flags | FD_CLOEXEC) == -1)
{
flags = errno;
closetty(fd, lockfile);
ast_log (LOG_WARNING, "fcntl(F_GETFD/F_SETFD) failed for %s: %s\n", dev, strerror(flags));
return -1;
}
if (tcgetattr (fd, &term_attr) != 0)
{
flags = errno;
closetty(fd, lockfile);
ast_log (LOG_WARNING, "tcgetattr() failed for %s: %s\n", dev, strerror(flags));
return -1;
}
term_attr.c_cflag = B115200 | CS8 | CREAD | CRTSCTS;
term_attr.c_iflag = 0;
term_attr.c_oflag = 0;
term_attr.c_lflag = 0;
term_attr.c_cc[VMIN] = 1;
term_attr.c_cc[VTIME] = 0;
if (tcsetattr (fd, TCSAFLUSH, &term_attr) != 0)
{
ast_log (LOG_WARNING, "tcsetattr(TCSAFLUSH) failed for %s: %s\n", dev, strerror(errno));
}
return fd;
}
#/* phone monitor thread pvt cleanup */
static void disconnect_dongle (struct pvt* pvt)
{
struct cpvt * cpvt, * next;
if (!PVT_NO_CHANS(pvt))
{
ast_debug (1, "[%s] Dongle disconnecting, hanging up channels\n", PVT_ID(pvt));
for(cpvt = pvt->chans.first; cpvt; cpvt = next)
{
next = cpvt->entry.next;
at_hangup_immediality(cpvt);
CPVT_RESET_FLAGS(cpvt, CALL_FLAG_NEED_HANGUP);
change_channel_state(cpvt, CALL_STATE_RELEASED, 0);
}
}
at_queue_flush(pvt);
pvt->last_dialed_cpvt = NULL;
closetty (pvt->audio_fd, &pvt->alock);
closetty (pvt->data_fd, &pvt->dlock);
pvt->data_fd = -1;
pvt->audio_fd = -1;
if(pvt->dsp)
ast_dsp_digitreset(pvt->dsp);
pvt_on_remove_last_channel(pvt);
/* pvt->a_write_rb */
pvt->dtmf_digit = 0;
pvt->rings = 0;
// else
{
/* unaffected in case of restart */
pvt->use_ucs2_encoding = 0;
pvt->cusd_use_7bit_encoding = 0;
pvt->cusd_use_ucs2_decoding = 1;
pvt->gsm_reg_status = -1;
pvt->rssi = 0;
pvt->linkmode = 0;
pvt->linksubmode = 0;
ast_copy_string (pvt->provider_name, "NONE", sizeof (pvt->provider_name));
pvt->manufacturer[0] = '\0';
pvt->model[0] = '\0';
pvt->firmware[0] = '\0';
pvt->imei[0] = '\0';
pvt->imsi[0] = '\0';
pvt->has_subscriber_number = 0;
ast_copy_string (pvt->subscriber_number, "Unknown", sizeof (pvt->subscriber_number));
pvt->location_area_code[0] = '\0';
pvt->cell_id[0] = '\0';
pvt->sms_scenter[0] = '\0';
pvt->gsm_registered = 0;
pvt->has_sms = 0;
pvt->has_voice = 0;
pvt->has_call_waiting = 0;
pvt->use_pdu = 0;
}
pvt->connected = 0;
pvt->initialized = 0;
pvt->use_pdu = 0;
pvt->has_call_waiting = 0;
/* FIXME: LOST real device state */
pvt->dialing = 0;
pvt->ring = 0;
pvt->cwaiting = 0;
pvt->outgoing_sms = 0;
pvt->incoming_sms = 0;
pvt->volume_sync_step = VOLUME_SYNC_BEGIN;
pvt->current_state = DEV_STATE_STOPPED;
/* clear statictics */
memset(&pvt->stat, 0, sizeof(pvt->stat));
ast_copy_string (PVT_STATE(pvt, data_tty), CONF_UNIQ(pvt, data_tty), sizeof (PVT_STATE(pvt, data_tty)));
ast_copy_string (PVT_STATE(pvt, audio_tty), CONF_UNIQ(pvt, audio_tty), sizeof (PVT_STATE(pvt, audio_tty)));
ast_verb (3, "[%s] Dongle has disconnected\n", PVT_ID(pvt));
manager_event_device_status(PVT_ID(pvt), "Disconnect");
}
/* anybody wrote some to device before me, and not read results, clean pending results here */
#/* */
EXPORT_DEF void clean_read_data(const char * devname, int fd)
{
char buf[2*1024];
struct ringbuffer rb;
int iovcnt;
int t;
rb_init (&rb, buf, sizeof (buf));
for (t = 0; at_wait(fd, &t); t = 0)
{
iovcnt = at_read (fd, devname, &rb);
ast_debug (4, "[%s] drop %u bytes of pending data before initialization\n", devname, (unsigned)rb_used(&rb));
/* drop readed */
rb_init (&rb, buf, sizeof (buf));
if (iovcnt == 0)
break;
}
}
/*!
* \brief Check if the module is unloading.
* \retval 0 not unloading
* \retval 1 unloading
*/
static void* do_monitor_phone (void* data)
{
struct pvt* pvt = (struct pvt*) data;
at_res_t at_res;
const struct at_queue_cmd * ecmd;
int t;
char buf[2*1024];
struct ringbuffer rb;
struct iovec iov[2];
int iovcnt;
char dev[sizeof(PVT_ID(pvt))];
int fd;
int read_result = 0;
pvt->timeout = DATA_READ_TIMEOUT;
rb_init (&rb, buf, sizeof (buf));
ast_mutex_lock (&pvt->lock);
/* 4 reduce locking time make copy of this readonly fields */
fd = pvt->data_fd;
ast_copy_string(dev, PVT_ID(pvt), sizeof(dev));
clean_read_data(dev, fd);
/* schedule dongle initilization */
if (at_enque_initialization (&pvt->sys_chan, CMD_AT))
{
ast_log (LOG_ERROR, "[%s] Error adding initialization commands to queue\n", dev);
goto e_cleanup;
}
ast_mutex_unlock (&pvt->lock);
while (1)
{
ast_mutex_lock (&pvt->lock);
if (port_status (pvt->data_fd) || port_status (pvt->audio_fd))
{
ast_log (LOG_ERROR, "[%s] Lost connection to Dongle\n", dev);
goto e_cleanup;
}
if(pvt->terminate_monitor)
{
ast_log (LOG_NOTICE, "[%s] stopping by %s request\n", dev, dev_state2str(pvt->desired_state));
goto e_restart;
}
t = at_queue_timeout(pvt);
if(t < 0)
t = pvt->timeout;
ast_mutex_unlock (&pvt->lock);
if (!at_wait (fd, &t))
{
ast_mutex_lock (&pvt->lock);
ecmd = at_queue_head_cmd (pvt);
if(ecmd)
{
ast_log (LOG_ERROR, "[%s] timedout while waiting '%s' in response to '%s'\n", dev, at_res2str (ecmd->res), at_cmd2str (ecmd->cmd));
goto e_cleanup;
}
at_enque_ping(&pvt->sys_chan);
ast_mutex_unlock (&pvt->lock);
continue;
}
/* FIXME: access to device not locked */
iovcnt = at_read (fd, dev, &rb);
if (iovcnt < 0)
{
break;
}
PVT_STAT(pvt, d_read_bytes) += iovcnt;
while ((iovcnt = at_read_result_iov (dev, &read_result, &rb, iov)) > 0)
{
at_res = at_read_result_classification (&rb, iov[0].iov_len + iov[1].iov_len);
ast_mutex_lock (&pvt->lock);
PVT_STAT(pvt, at_responces) ++;
if (at_response (pvt, iov, iovcnt, at_res) || at_queue_run(pvt))
{
goto e_cleanup;
}
ast_mutex_unlock (&pvt->lock);
}
}
ast_mutex_lock (&pvt->lock);
e_cleanup:
if (!pvt->initialized)
{
// TODO: send monitor event
ast_verb (3, "[%s] Error initializing Dongle\n", dev);
}
/* it real, unsolicited disconnect */
pvt->terminate_monitor = 0;
e_restart:
disconnect_dongle (pvt);
// pvt->monitor_running = 0;
ast_mutex_unlock (&pvt->lock);
/* TODO: wakeup discovery thread after some delay */
return NULL;
}
static inline int start_monitor (struct pvt * pvt)
{
if (ast_pthread_create_background (&pvt->monitor_thread, NULL, do_monitor_phone, pvt) < 0)
{
pvt->monitor_thread = AST_PTHREADT_NULL;
return 0;
}
return 1;
}
#/* */
static void pvt_stop(struct pvt * pvt)
{
pthread_t id;
if(pvt->monitor_thread != AST_PTHREADT_NULL)
{
pvt->terminate_monitor = 1;
pthread_kill (pvt->monitor_thread, SIGURG);
id = pvt->monitor_thread;
ast_mutex_unlock (&pvt->lock);
pthread_join (id, NULL);
ast_mutex_lock (&pvt->lock);
pvt->terminate_monitor = 0;
pvt->monitor_thread = AST_PTHREADT_NULL;
}
// pvt->current_state = DEV_STATE_STOPPED;
}
#/* called with pvt lock hold */
static int pvt_discovery(struct pvt * pvt)
{
char devname[DEVNAMELEN];
char imei[IMEI_SIZE+1];
char imsi[IMSI_SIZE+1];
int resolved;
if(CONF_UNIQ(pvt, data_tty)[0] == 0 && CONF_UNIQ(pvt, audio_tty)[0] == 0) {
char * data_tty;
char * audio_tty;
ast_copy_string(devname, PVT_ID(pvt), sizeof(devname));
ast_copy_string(imei, CONF_UNIQ(pvt, imei), sizeof(imei));
ast_copy_string(imsi, CONF_UNIQ(pvt, imsi), sizeof(imsi));
ast_debug(3, "[%s] Trying ports discovery for%s%s%s%s\n",
PVT_ID(pvt),
imei[0] == 0 ? "" : " IMEI ",
imei,
imsi[0] == 0 ? "" : " IMSI ",
imsi
);
ast_mutex_unlock (&pvt->lock);
//sleep(10); // test
resolved = pdiscovery_lookup(devname, imei, imsi, &data_tty, &audio_tty);
ast_mutex_lock (&pvt->lock);
if(resolved) {
ast_copy_string (PVT_STATE(pvt, data_tty), data_tty, sizeof (PVT_STATE(pvt, data_tty)));
ast_copy_string (PVT_STATE(pvt, audio_tty), audio_tty, sizeof (PVT_STATE(pvt, audio_tty)));
ast_free(audio_tty);
ast_free(data_tty);
ast_verb (3, "[%s]%s%s%s%s found on data_tty=%s audio_tty=%s\n",
PVT_ID(pvt),
imei[0] == 0 ? "" : " IMEI ",
imei,
imsi[0] == 0 ? "" : " IMSI ",
imsi,
PVT_STATE(pvt, data_tty),
PVT_STATE(pvt, audio_tty)
);
} else {
ast_debug(3, "[%s] Not found ports for%s%s%s%s\n",
PVT_ID(pvt),
imei[0] == 0 ? "" : " IMEI ",
imei,
imsi[0] == 0 ? "" : " IMSI ",
imsi
);
}
} else {
ast_copy_string (PVT_STATE(pvt, data_tty), CONF_UNIQ(pvt, data_tty), sizeof (PVT_STATE(pvt, data_tty)));
ast_copy_string (PVT_STATE(pvt, audio_tty), CONF_UNIQ(pvt, audio_tty), sizeof (PVT_STATE(pvt, audio_tty)));
resolved = 1;
}
return ! resolved;
}
#/* */
static void pvt_start(struct pvt * pvt)
{
/* prevent start_monitor() multiple times and on turned off devices */
if (!pvt->connected && pvt->desired_state == DEV_STATE_STARTED)
// && (pvt->monitor_thread == AST_PTHREADT_NULL || (pthread_kill(pvt->monitor_thread, 0) != 0 && errno == ESRCH)))
{
pvt_stop(pvt);
if(pvt_discovery(pvt))
return;
ast_verb (3, "[%s] Trying to connect on %s...\n", PVT_ID(pvt), PVT_STATE(pvt, data_tty));
pvt->data_fd = opentty(PVT_STATE(pvt, data_tty), &pvt->dlock);
if (pvt->data_fd >= 0)
{
// TODO: delay until device activate voice call or at pvt_on_create_1st_channel()
pvt->audio_fd = opentty(PVT_STATE(pvt, audio_tty), &pvt->alock);
if (pvt->audio_fd >= 0)
{
if (start_monitor (pvt))
{
pvt->connected = 1;
pvt->current_state = DEV_STATE_STARTED;
manager_event_device_status(PVT_ID(pvt), "Connect");
ast_verb (3, "[%s] Dongle has connected, initializing...\n", PVT_ID(pvt));
return;
}
closetty(pvt->audio_fd, &pvt->alock);
}
closetty(pvt->data_fd, &pvt->dlock);
}
}
}
#/* */
static void pvt_free(struct pvt * pvt)
{
at_queue_flush(pvt);
if(pvt->dsp)
ast_dsp_free(pvt->dsp);
ast_mutex_unlock(&pvt->lock);
ast_free(pvt);
}
#/* */
static void pvt_destroy(struct pvt * pvt)
{
ast_mutex_lock(&pvt->lock);
pvt_stop(pvt);
pvt_free(pvt);
}
static void * do_discovery(void * arg)
{
struct public_state * state = (struct public_state *) arg;
struct pvt * pvt;
while(state->unloading_flag == 0)
{
/* read lock for avoid deadlock when IMEI/IMSI discovery */
AST_RWLIST_RDLOCK(&state->devices);
AST_RWLIST_TRAVERSE(&state->devices, pvt, entry)
{
ast_mutex_lock (&pvt->lock);
pvt->must_remove = 0;
if(pvt->restart_time == RESTATE_TIME_NOW && pvt->desired_state != pvt->current_state)
{
switch(pvt->desired_state)
{
case DEV_STATE_RESTARTED:
pvt_stop(pvt);
/* passthru */
pvt->desired_state = DEV_STATE_STARTED;
case DEV_STATE_STARTED:
pvt_start(pvt);
break;
case DEV_STATE_REMOVED:
pvt_stop(pvt);
pvt->must_remove = 1;
break;
case DEV_STATE_STOPPED:
pvt_stop(pvt);
}
}
ast_mutex_unlock (&pvt->lock);
}
AST_RWLIST_UNLOCK (&state->devices);
/* actual device removal here for avoid long (discovery) time write lock on device list in loop above */
AST_RWLIST_WRLOCK(&state->devices);
AST_RWLIST_TRAVERSE_SAFE_BEGIN(&state->devices, pvt, entry)
{
ast_mutex_lock(&pvt->lock);
if(pvt->must_remove)
{
AST_RWLIST_REMOVE_CURRENT(entry);
pvt_free(pvt);
} else
ast_mutex_unlock(&pvt->lock);
}
AST_RWLIST_TRAVERSE_SAFE_END;
AST_RWLIST_UNLOCK(&state->devices);
/* Go to sleep (only if we are not unloading) */
if (state->unloading_flag == 0)
{
sleep(SCONF_GLOBAL(state, discovery_interval));
}
}
return NULL;
}
#/* */
static int discovery_restart(public_state_t * state)
{
if(state->discovery_thread == AST_PTHREADT_STOP)
return 0;
ast_mutex_lock(&state->discovery_lock);
if (state->discovery_thread == pthread_self()) {
ast_mutex_unlock(&state->discovery_lock);
ast_log(LOG_WARNING, "Cannot kill myself\n");
return -1;
}
if (state->discovery_thread != AST_PTHREADT_NULL) {
/* Wake up the thread */
pthread_kill(state->discovery_thread, SIGURG);
} else {
/* Start a new monitor */
if (ast_pthread_create_background(&state->discovery_thread, NULL, do_discovery, state) < 0) {
ast_mutex_unlock(&state->discovery_lock);
ast_log(LOG_ERROR, "Unable to start discovery thread\n");
return -1;
}
}
ast_mutex_unlock(&state->discovery_lock);
return 0;
}
#/* */
static void discovery_stop(public_state_t * state)
{
/* signal for discovery unloading */
state->unloading_flag = 1;
ast_mutex_lock(&state->discovery_lock);
if (state->discovery_thread && (state->discovery_thread != AST_PTHREADT_STOP) && (state->discovery_thread != AST_PTHREADT_NULL)) {
// pthread_cancel(state->discovery_thread);
pthread_kill(state->discovery_thread, SIGURG);
pthread_join(state->discovery_thread, NULL);
}
state->discovery_thread = AST_PTHREADT_STOP;
ast_mutex_unlock(&state->discovery_lock);
}
#/* */
EXPORT_DEF void pvt_on_create_1st_channel(struct pvt* pvt)
{
mixb_init (&pvt->a_write_mixb, pvt->a_write_buf, sizeof (pvt->a_write_buf));
// rb_init (&pvt->a_write_rb, pvt->a_write_buf, sizeof (pvt->a_write_buf));
if(!pvt->a_timer)
pvt->a_timer = ast_timer_open ();
/* FIXME: do on each channel switch */
if(pvt->dsp)
ast_dsp_digitreset (pvt->dsp);
pvt->dtmf_digit = 0;
pvt->dtmf_begin_time.tv_sec = 0;
pvt->dtmf_begin_time.tv_usec = 0;
pvt->dtmf_end_time.tv_sec = 0;
pvt->dtmf_end_time.tv_usec = 0;
manager_event_device_status(PVT_ID(pvt), "Used");
}
#/* */
EXPORT_DEF void pvt_on_remove_last_channel(struct pvt* pvt)
{
if (pvt->a_timer)
{
ast_timer_close(pvt->a_timer);
pvt->a_timer = NULL;
}
manager_event_device_status(PVT_ID(pvt), "Free");
}
#define SET_BIT(dw_array,bitno) do { (dw_array)[(bitno) >> 5] |= 1 << ((bitno) & 31) ; } while(0)
#define TEST_BIT(dw_array,bitno) ((dw_array)[(bitno) >> 5] & 1 << ((bitno) & 31))
#/* */
EXPORT_DEF int pvt_get_pseudo_call_idx(const struct pvt * pvt)
{
struct cpvt * cpvt;
int * bits;
int dwords = ((MAX_CALL_IDX + sizeof(*bits) - 1) / sizeof(*bits));
bits = alloca(dwords * sizeof(*bits));
memset(bits, 0, dwords * sizeof(*bits));
AST_LIST_TRAVERSE(&pvt->chans, cpvt, entry) {
SET_BIT(bits, cpvt->call_idx);
}
for(dwords = 1; dwords <= MAX_CALL_IDX; dwords++)
{
if(!TEST_BIT(bits, dwords))
return dwords;
}
return 0;
}
#undef TEST_BIT
#undef SET_BIT
#/* */
static int is_dial_possible2(const struct pvt * pvt, int opts, const struct cpvt * ignore_cpvt)
{
struct cpvt * cpvt;
int hold = 0;
int active = 0;
// FIXME: allow HOLD states for CONFERENCE
int use_call_waiting = opts & CALL_FLAG_HOLD_OTHER;
if(pvt->ring || pvt->cwaiting || pvt->dialing)
return 0;
AST_LIST_TRAVERSE(&pvt->chans, cpvt, entry) {
switch(cpvt->state)
{
case CALL_STATE_INIT:
if(cpvt != ignore_cpvt)
return 0;
break;
case CALL_STATE_DIALING:
case CALL_STATE_ALERTING:
case CALL_STATE_INCOMING:
case CALL_STATE_WAITING:
return 0;
case CALL_STATE_ACTIVE:
if(hold || !use_call_waiting)
return 0;
active++;
break;
case CALL_STATE_ONHOLD:
if(active || !use_call_waiting)
return 0;
hold++;
break;
case CALL_STATE_RELEASED:
;
}
}
return 1;
}
#/* */
EXPORT_DEF int is_dial_possible(const struct pvt * pvt, int opts)
{
return is_dial_possible2(pvt, opts, NULL);
}
#/* */
EXPORT_DECL int pvt_enabled(const struct pvt * pvt)
{
return pvt->current_state == DEV_STATE_STARTED && (pvt->desired_state == pvt->current_state || pvt->restart_time == RESTATE_TIME_CONVENIENT);
}
#/* */
EXPORT_DEF int ready4voice_call(const struct pvt* pvt, const struct cpvt * current_cpvt, int opts)
{
if(!pvt->connected
||
!pvt->initialized
||
!pvt->has_voice
||
!pvt->gsm_registered
||
!pvt_enabled(pvt)
)
return 0;
return is_dial_possible2(pvt, opts, current_cpvt);
}
#/* */
static int can_dial(struct pvt* pvt, int opts, const struct ast_channel * requestor)
{
/* not allow hold requester channel :) */
/* FIXME: requestor may be just proxy/masquerade for real channel */
// use ast_bridged_channel(chan) ?
// use requestor->tech->get_base_channel() ?
if((opts & CALL_FLAG_HOLD_OTHER) == CALL_FLAG_HOLD_OTHER && channels_loop(pvt, requestor))
return 0;
return ready4voice_call(pvt, NULL, opts);
}
#/* return locked pvt or NULL */
EXPORT_DEF struct pvt * find_device_ex(struct public_state * state, const char * name)
{
struct pvt * pvt;
AST_RWLIST_RDLOCK(&state->devices);
AST_RWLIST_TRAVERSE(&state->devices, pvt, entry)
{
ast_mutex_lock (&pvt->lock);
if (!strcmp (PVT_ID(pvt), name))
{
break;
}
ast_mutex_unlock (&pvt->lock);
}
AST_RWLIST_UNLOCK(&state->devices);
return pvt;
}
#/* return locked pvt or NULL */
EXPORT_DEF struct pvt * find_device_ext (const char * name, const char ** reason)
{
char * res = "";
struct pvt * pvt = find_device(name);
if(pvt)
{
if(!pvt_enabled(pvt))
{
ast_mutex_unlock (&pvt->lock);
res = "device disabled";
pvt = NULL;
}
}
else
res = "no such device";
if(reason)
*reason = res;
return pvt;
}
#/* like find_device but for resource spec; return locked! pvt or NULL */
EXPORT_DEF struct pvt * find_device_by_resource_ex(struct public_state * state, const char * resource, int opts, const struct ast_channel * requestor, int * exists)
{
int group;
size_t i;
size_t j;
size_t c;
size_t last_used;
struct pvt * pvt;
struct pvt * found = NULL;
*exists = 0;
/* Find requested device and make sure it's connected and initialized. */
AST_RWLIST_RDLOCK(&state->devices);
if (((resource[0] == 'g') || (resource[0] == 'G')) && ((resource[1] >= '0') && (resource[1] <= '9')))
{
errno = 0;
group = (int) strtol (&resource[1], (char**) NULL, 10);
if (errno != EINVAL)
{
AST_RWLIST_TRAVERSE(&state->devices, pvt, entry)
{
ast_mutex_lock (&pvt->lock);
if (CONF_SHARED(pvt, group) == group)
{
*exists = 1;
if(can_dial(pvt, opts, requestor))
{
found = pvt;
break;
}
}
ast_mutex_unlock (&pvt->lock);
}
}
}
else if (((resource[0] == 'r') || (resource[0] == 'R')) && ((resource[1] >= '0') && (resource[1] <= '9')))
{
errno = 0;
group = (int) strtol (&resource[1], (char**) NULL, 10);
if (errno != EINVAL)
{
ast_mutex_lock(&state->round_robin_mtx);
/* Generate a list of all availible devices */
j = ITEMS_OF (state->round_robin);
c = 0; last_used = 0;
AST_RWLIST_TRAVERSE(&state->devices, pvt, entry)
{
ast_mutex_lock (&pvt->lock);
if (CONF_SHARED(pvt, group) == group)
{
state->round_robin[c] = pvt;
if (pvt->group_last_used == 1)
{
pvt->group_last_used = 0;
last_used = c;
}
c++;
if (c == j)
{
ast_mutex_unlock (&pvt->lock);
break;
}
}
ast_mutex_unlock (&pvt->lock);
}
/* Search for a availible device starting at the last used device */
for (i = 0, j = last_used + 1; i < c; i++, j++)
{