diff options
author | kpfleming <kpfleming@f38db490-d61c-443f-a65b-d21fe96a405b> | 2006-08-21 02:11:39 +0000 |
---|---|---|
committer | kpfleming <kpfleming@f38db490-d61c-443f-a65b-d21fe96a405b> | 2006-08-21 02:11:39 +0000 |
commit | 8b0c007ad990aa27d9868da49215fd1076ac77cc (patch) | |
tree | 270b9c46c1e644483d6d2a35b509f43218ba3252 /channel.c | |
parent | a42edc84034f91932a3e12d503e07f76a6eb498a (diff) |
merge new_loader_completion branch, including (at least):
- restructured build tree and makefiles to eliminate recursion problems
- support for embedded modules
- support for static builds
- simpler cross-compilation support
- simpler module/loader interface (no exported symbols)
git-svn-id: http://svn.digium.com/svn/asterisk/trunk@40722 f38db490-d61c-443f-a65b-d21fe96a405b
Diffstat (limited to 'channel.c')
-rw-r--r-- | channel.c | 4516 |
1 files changed, 0 insertions, 4516 deletions
diff --git a/channel.c b/channel.c deleted file mode 100644 index a56961627..000000000 --- a/channel.c +++ /dev/null @@ -1,4516 +0,0 @@ -/* - * Asterisk -- An open source telephony toolkit. - * - * Copyright (C) 1999 - 2006, Digium, Inc. - * - * Mark Spencer <markster@digium.com> - * - * See http://www.asterisk.org for more information about - * the Asterisk project. Please do not directly contact - * any of the maintainers of this project for assistance; - * the project provides a web site, mailing lists and IRC - * channels for your use. - * - * 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 Channel Management - * - * \author Mark Spencer <markster@digium.com> - */ - -#include "asterisk.h" - -ASTERISK_FILE_VERSION(__FILE__, "$Revision$") - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <sys/time.h> -#include <signal.h> -#include <errno.h> -#include <unistd.h> -#include <math.h> - -#ifdef HAVE_ZAPTEL -#include <sys/ioctl.h> -#include <zaptel/zaptel.h> -#endif - -#include "asterisk/pbx.h" -#include "asterisk/frame.h" -#include "asterisk/sched.h" -#include "asterisk/options.h" -#include "asterisk/channel.h" -#include "asterisk/chanspy.h" -#include "asterisk/musiconhold.h" -#include "asterisk/logger.h" -#include "asterisk/say.h" -#include "asterisk/file.h" -#include "asterisk/cli.h" -#include "asterisk/translate.h" -#include "asterisk/manager.h" -#include "asterisk/chanvars.h" -#include "asterisk/linkedlists.h" -#include "asterisk/indications.h" -#include "asterisk/monitor.h" -#include "asterisk/causes.h" -#include "asterisk/callerid.h" -#include "asterisk/utils.h" -#include "asterisk/lock.h" -#include "asterisk/app.h" -#include "asterisk/transcap.h" -#include "asterisk/devicestate.h" -#include "asterisk/sha1.h" -#include "asterisk/threadstorage.h" -#include "asterisk/slinfactory.h" - -struct channel_spy_trans { - int last_format; - struct ast_trans_pvt *path; -}; - -struct ast_channel_spy_list { - struct channel_spy_trans read_translator; - struct channel_spy_trans write_translator; - AST_LIST_HEAD_NOLOCK(, ast_channel_spy) list; -}; - -struct ast_channel_whisper_buffer { - ast_mutex_t lock; - struct ast_slinfactory sf; - unsigned int original_format; -}; - -/* uncomment if you have problems with 'monitoring' synchronized files */ -#if 0 -#define MONITOR_CONSTANT_DELAY -#define MONITOR_DELAY 150 * 8 /* 150 ms of MONITORING DELAY */ -#endif - -/*! Prevent new channel allocation if shutting down. */ -static int shutting_down = 0; - -AST_MUTEX_DEFINE_STATIC(uniquelock); -static int uniqueint = 0; - -unsigned long global_fin = 0, global_fout = 0; - -AST_THREADSTORAGE(state2str_threadbuf, state2str_threadbuf_init); -#define STATE2STR_BUFSIZE 32 - -struct chanlist { - const struct ast_channel_tech *tech; - AST_LIST_ENTRY(chanlist) list; -}; - -/*! the list of registered channel types */ -static AST_LIST_HEAD_NOLOCK_STATIC(backends, chanlist); - -/*! the list of channels we have. Note that the lock for this list is used for - both the channels list and the backends list. */ -static AST_LIST_HEAD_STATIC(channels, ast_channel); - -/*! map AST_CAUSE's to readable string representations */ -const struct ast_cause { - int cause; - const char *name; - const char *desc; -} causes[] = { - { AST_CAUSE_UNALLOCATED, "UNALLOCATED", "Unallocated (unassigned) number" }, - { AST_CAUSE_NO_ROUTE_TRANSIT_NET, "NO_ROUTE_TRANSIT_NET", "No route to specified transmit network" }, - { AST_CAUSE_NO_ROUTE_DESTINATION, "NO_ROUTE_DESTINATION", "No route to destination" }, - { AST_CAUSE_CHANNEL_UNACCEPTABLE, "CHANNEL_UNACCEPTABLE", "Channel unacceptable" }, - { AST_CAUSE_CALL_AWARDED_DELIVERED, "CALL_AWARDED_DELIVERED", "Call awarded and being delivered in an established channel" }, - { AST_CAUSE_NORMAL_CLEARING, "NORMAL_CLEARING", "Normal Clearing" }, - { AST_CAUSE_USER_BUSY, "USER_BUSY", "User busy" }, - { AST_CAUSE_NO_USER_RESPONSE, "NO_USER_RESPONSE", "No user responding" }, - { AST_CAUSE_NO_ANSWER, "NO_ANSWER", "User alerting, no answer" }, - { AST_CAUSE_CALL_REJECTED, "CALL_REJECTED", "Call Rejected" }, - { AST_CAUSE_NUMBER_CHANGED, "NUMBER_CHANGED", "Number changed" }, - { AST_CAUSE_DESTINATION_OUT_OF_ORDER, "DESTINATION_OUT_OF_ORDER", "Destination out of order" }, - { AST_CAUSE_INVALID_NUMBER_FORMAT, "INVALID_NUMBER_FORMAT", "Invalid number format" }, - { AST_CAUSE_FACILITY_REJECTED, "FACILITY_REJECTED", "Facility rejected" }, - { AST_CAUSE_RESPONSE_TO_STATUS_ENQUIRY, "RESPONSE_TO_STATUS_ENQUIRY", "Response to STATus ENQuiry" }, - { AST_CAUSE_NORMAL_UNSPECIFIED, "NORMAL_UNSPECIFIED", "Normal, unspecified" }, - { AST_CAUSE_NORMAL_CIRCUIT_CONGESTION, "NORMAL_CIRCUIT_CONGESTION", "Circuit/channel congestion" }, - { AST_CAUSE_NETWORK_OUT_OF_ORDER, "NETWORK_OUT_OF_ORDER", "Network out of order" }, - { AST_CAUSE_NORMAL_TEMPORARY_FAILURE, "NORMAL_TEMPORARY_FAILURE", "Temporary failure" }, - { AST_CAUSE_SWITCH_CONGESTION, "SWITCH_CONGESTION", "Switching equipment congestion" }, - { AST_CAUSE_ACCESS_INFO_DISCARDED, "ACCESS_INFO_DISCARDED", "Access information discarded" }, - { AST_CAUSE_REQUESTED_CHAN_UNAVAIL, "REQUESTED_CHAN_UNAVAIL", "Requested channel not available" }, - { AST_CAUSE_PRE_EMPTED, "PRE_EMPTED", "Pre-empted" }, - { AST_CAUSE_FACILITY_NOT_SUBSCRIBED, "FACILITY_NOT_SUBSCRIBED", "Facility not subscribed" }, - { AST_CAUSE_OUTGOING_CALL_BARRED, "OUTGOING_CALL_BARRED", "Outgoing call barred" }, - { AST_CAUSE_INCOMING_CALL_BARRED, "INCOMING_CALL_BARRED", "Incoming call barred" }, - { AST_CAUSE_BEARERCAPABILITY_NOTAUTH, "BEARERCAPABILITY_NOTAUTH", "Bearer capability not authorized" }, - { AST_CAUSE_BEARERCAPABILITY_NOTAVAIL, "BEARERCAPABILITY_NOTAVAIL", "Bearer capability not available" }, - { AST_CAUSE_BEARERCAPABILITY_NOTIMPL, "BEARERCAPABILITY_NOTIMPL", "Bearer capability not implemented" }, - { AST_CAUSE_CHAN_NOT_IMPLEMENTED, "CHAN_NOT_IMPLEMENTED", "Channel not implemented" }, - { AST_CAUSE_FACILITY_NOT_IMPLEMENTED, "FACILITY_NOT_IMPLEMENTED", "Facility not implemented" }, - { AST_CAUSE_INVALID_CALL_REFERENCE, "INVALID_CALL_REFERENCE", "Invalid call reference value" }, - { AST_CAUSE_INCOMPATIBLE_DESTINATION, "INCOMPATIBLE_DESTINATION", "Incompatible destination" }, - { AST_CAUSE_INVALID_MSG_UNSPECIFIED, "INVALID_MSG_UNSPECIFIED", "Invalid message unspecified" }, - { AST_CAUSE_MANDATORY_IE_MISSING, "MANDATORY_IE_MISSING", "Mandatory information element is missing" }, - { AST_CAUSE_MESSAGE_TYPE_NONEXIST, "MESSAGE_TYPE_NONEXIST", "Message type nonexist." }, - { AST_CAUSE_WRONG_MESSAGE, "WRONG_MESSAGE", "Wrong message" }, - { AST_CAUSE_IE_NONEXIST, "IE_NONEXIST", "Info. element nonexist or not implemented" }, - { AST_CAUSE_INVALID_IE_CONTENTS, "INVALID_IE_CONTENTS", "Invalid information element contents" }, - { AST_CAUSE_WRONG_CALL_STATE, "WRONG_CALL_STATE", "Message not compatible with call state" }, - { AST_CAUSE_RECOVERY_ON_TIMER_EXPIRE, "RECOVERY_ON_TIMER_EXPIRE", "Recover on timer expiry" }, - { AST_CAUSE_MANDATORY_IE_LENGTH_ERROR, "MANDATORY_IE_LENGTH_ERROR", "Mandatory IE length error" }, - { AST_CAUSE_PROTOCOL_ERROR, "PROTOCOL_ERROR", "Protocol error, unspecified" }, - { AST_CAUSE_INTERWORKING, "INTERWORKING", "Interworking, unspecified" }, -}; - -struct ast_variable *ast_channeltype_list(void) -{ - struct chanlist *cl; - struct ast_variable *var=NULL, *prev = NULL; - AST_LIST_TRAVERSE(&backends, cl, list) { - if (prev) { - if ((prev->next = ast_variable_new(cl->tech->type, cl->tech->description))) - prev = prev->next; - } else { - var = ast_variable_new(cl->tech->type, cl->tech->description); - prev = var; - } - } - return var; -} - -static int show_channeltypes(int fd, int argc, char *argv[]) -{ -#define FORMAT "%-10.10s %-40.40s %-12.12s %-12.12s %-12.12s\n" - struct chanlist *cl; - int count_chan = 0; - - ast_cli(fd, FORMAT, "Type", "Description", "Devicestate", "Indications", "Transfer"); - ast_cli(fd, FORMAT, "----------", "-----------", "-----------", "-----------", "--------"); - if (AST_LIST_LOCK(&channels)) { - ast_log(LOG_WARNING, "Unable to lock channel list\n"); - return -1; - } - AST_LIST_TRAVERSE(&backends, cl, list) { - ast_cli(fd, FORMAT, cl->tech->type, cl->tech->description, - (cl->tech->devicestate) ? "yes" : "no", - (cl->tech->indicate) ? "yes" : "no", - (cl->tech->transfer) ? "yes" : "no"); - count_chan++; - } - AST_LIST_UNLOCK(&channels); - ast_cli(fd, "----------\n%d channel drivers registered.\n", count_chan); - return RESULT_SUCCESS; - -#undef FORMAT - -} - -static int show_channeltype(int fd, int argc, char *argv[]) -{ - struct chanlist *cl = NULL; - - if (argc != 3) - return RESULT_SHOWUSAGE; - - if (AST_LIST_LOCK(&channels)) { - ast_log(LOG_WARNING, "Unable to lock channel list\n"); - return RESULT_FAILURE; - } - - AST_LIST_TRAVERSE(&backends, cl, list) { - if (!strncasecmp(cl->tech->type, argv[2], strlen(cl->tech->type))) { - break; - } - } - - - if (!cl) { - ast_cli(fd, "\n%s is not a registered channel driver.\n", argv[2]); - AST_LIST_UNLOCK(&channels); - return RESULT_FAILURE; - } - - ast_cli(fd, - "-- Info about channel driver: %s --\n" - " Device State: %s\n" - " Indication: %s\n" - " Transfer : %s\n" - " Capabilities: %d\n" - " Send Digit: %s\n" - " Send HTML : %s\n" - " Image Support: %s\n" - " Text Support: %s\n", - cl->tech->type, - (cl->tech->devicestate) ? "yes" : "no", - (cl->tech->indicate) ? "yes" : "no", - (cl->tech->transfer) ? "yes" : "no", - (cl->tech->capabilities) ? cl->tech->capabilities : -1, - (cl->tech->send_digit) ? "yes" : "no", - (cl->tech->send_html) ? "yes" : "no", - (cl->tech->send_image) ? "yes" : "no", - (cl->tech->send_text) ? "yes" : "no" - - ); - - AST_LIST_UNLOCK(&channels); - return RESULT_SUCCESS; -} - -static char *complete_channeltypes(const char *line, const char *word, int pos, int state) -{ - struct chanlist *cl; - int which = 0; - int wordlen; - char *ret = NULL; - - if (pos != 2) - return NULL; - - wordlen = strlen(word); - - AST_LIST_TRAVERSE(&backends, cl, list) { - if (!strncasecmp(word, cl->tech->type, wordlen) && ++which > state) { - ret = strdup(cl->tech->type); - break; - } - } - - return ret; -} - -static char show_channeltypes_usage[] = -"Usage: show channeltypes\n" -" Shows available channel types registered in your Asterisk server.\n"; - -static char show_channeltype_usage[] = -"Usage: show channeltype <name>\n" -" Show details about the specified channel type, <name>.\n"; - -static struct ast_cli_entry cli_show_channeltypes = - { { "show", "channeltypes", NULL }, show_channeltypes, "Show available channel types", show_channeltypes_usage }; - -static struct ast_cli_entry cli_show_channeltype = - { { "show", "channeltype", NULL }, show_channeltype, "Give more details on that channel type", show_channeltype_usage, complete_channeltypes }; - -/*! \brief Checks to see if a channel is needing hang up */ -int ast_check_hangup(struct ast_channel *chan) -{ - if (chan->_softhangup) /* yes if soft hangup flag set */ - return 1; - if (!chan->tech_pvt) /* yes if no technology private data */ - return 1; - if (!chan->whentohangup) /* no if no hangup scheduled */ - return 0; - if (chan->whentohangup > time(NULL)) /* no if hangup time has not come yet. */ - return 0; - chan->_softhangup |= AST_SOFTHANGUP_TIMEOUT; /* record event */ - return 1; -} - -static int ast_check_hangup_locked(struct ast_channel *chan) -{ - int res; - ast_channel_lock(chan); - res = ast_check_hangup(chan); - ast_channel_unlock(chan); - return res; -} - -/*! \brief Initiate system shutdown */ -void ast_begin_shutdown(int hangup) -{ - struct ast_channel *c; - shutting_down = 1; - if (hangup) { - AST_LIST_LOCK(&channels); - AST_LIST_TRAVERSE(&channels, c, chan_list) - ast_softhangup(c, AST_SOFTHANGUP_SHUTDOWN); - AST_LIST_UNLOCK(&channels); - } -} - -/*! \brief returns number of active/allocated channels */ -int ast_active_channels(void) -{ - struct ast_channel *c; - int cnt = 0; - AST_LIST_LOCK(&channels); - AST_LIST_TRAVERSE(&channels, c, chan_list) - cnt++; - AST_LIST_UNLOCK(&channels); - return cnt; -} - -/*! \brief Cancel a shutdown in progress */ -void ast_cancel_shutdown(void) -{ - shutting_down = 0; -} - -/*! \brief Returns non-zero if Asterisk is being shut down */ -int ast_shutting_down(void) -{ - return shutting_down; -} - -/*! \brief Set when to hangup channel */ -void ast_channel_setwhentohangup(struct ast_channel *chan, time_t offset) -{ - chan->whentohangup = offset ? time(NULL) + offset : 0; - ast_queue_frame(chan, &ast_null_frame); - return; -} - -/*! \brief Compare a offset with when to hangup channel */ -int ast_channel_cmpwhentohangup(struct ast_channel *chan, time_t offset) -{ - time_t whentohangup; - - if (chan->whentohangup == 0) { - return (offset == 0) ? 0 : -1; - } else { - if (offset == 0) /* XXX why is this special ? */ - return (1); - else { - whentohangup = offset + time (NULL); - if (chan->whentohangup < whentohangup) - return (1); - else if (chan->whentohangup == whentohangup) - return (0); - else - return (-1); - } - } -} - -/*! \brief Register a new telephony channel in Asterisk */ -int ast_channel_register(const struct ast_channel_tech *tech) -{ - struct chanlist *chan; - - AST_LIST_LOCK(&channels); - - AST_LIST_TRAVERSE(&backends, chan, list) { - if (!strcasecmp(tech->type, chan->tech->type)) { - ast_log(LOG_WARNING, "Already have a handler for type '%s'\n", tech->type); - AST_LIST_UNLOCK(&channels); - return -1; - } - } - - if (!(chan = ast_calloc(1, sizeof(*chan)))) { - AST_LIST_UNLOCK(&channels); - return -1; - } - chan->tech = tech; - AST_LIST_INSERT_HEAD(&backends, chan, list); - - if (option_debug) - ast_log(LOG_DEBUG, "Registered handler for '%s' (%s)\n", chan->tech->type, chan->tech->description); - - if (option_verbose > 1) - ast_verbose(VERBOSE_PREFIX_2 "Registered channel type '%s' (%s)\n", chan->tech->type, - chan->tech->description); - - AST_LIST_UNLOCK(&channels); - return 0; -} - -void ast_channel_unregister(const struct ast_channel_tech *tech) -{ - struct chanlist *chan; - - if (option_debug) - ast_log(LOG_DEBUG, "Unregistering channel type '%s'\n", tech->type); - - AST_LIST_LOCK(&channels); - - AST_LIST_TRAVERSE_SAFE_BEGIN(&backends, chan, list) { - if (chan->tech == tech) { - AST_LIST_REMOVE_CURRENT(&backends, list); - free(chan); - if (option_verbose > 1) - ast_verbose(VERBOSE_PREFIX_2 "Unregistered channel type '%s'\n", tech->type); - break; - } - } - AST_LIST_TRAVERSE_SAFE_END - - AST_LIST_UNLOCK(&channels); -} - -const struct ast_channel_tech *ast_get_channel_tech(const char *name) -{ - struct chanlist *chanls; - const struct ast_channel_tech *ret = NULL; - - if (AST_LIST_LOCK(&channels)) { - ast_log(LOG_WARNING, "Unable to lock channel tech list\n"); - return NULL; - } - - AST_LIST_TRAVERSE(&backends, chanls, list) { - if (!strcasecmp(name, chanls->tech->type)) { - ret = chanls->tech; - break; - } - } - - AST_LIST_UNLOCK(&channels); - - return ret; -} - -/*! \brief Gives the string form of a given hangup cause */ -const char *ast_cause2str(int cause) -{ - int x; - - for (x=0; x < sizeof(causes) / sizeof(causes[0]); x++) { - if (causes[x].cause == cause) - return causes[x].desc; - } - - return "Unknown"; -} - -/*! \brief Convert a symbolic hangup cause to number */ -int ast_str2cause(const char *name) -{ - int x; - - for (x = 0; x < sizeof(causes) / sizeof(causes[0]); x++) - if (strncasecmp(causes[x].name, name, strlen(causes[x].name)) == 0) - return causes[x].cause; - - return -1; -} - -/*! \brief Gives the string form of a given channel state */ -char *ast_state2str(enum ast_channel_state state) -{ - char *buf; - - switch(state) { - case AST_STATE_DOWN: - return "Down"; - case AST_STATE_RESERVED: - return "Rsrvd"; - case AST_STATE_OFFHOOK: - return "OffHook"; - case AST_STATE_DIALING: - return "Dialing"; - case AST_STATE_RING: - return "Ring"; - case AST_STATE_RINGING: - return "Ringing"; - case AST_STATE_UP: - return "Up"; - case AST_STATE_BUSY: - return "Busy"; - case AST_STATE_DIALING_OFFHOOK: - return "Dialing Offhook"; - case AST_STATE_PRERING: - return "Pre-ring"; - default: - if (!(buf = ast_threadstorage_get(&state2str_threadbuf, STATE2STR_BUFSIZE))) - return "Unknown"; - snprintf(buf, STATE2STR_BUFSIZE, "Unknown (%d)", state); - return buf; - } -} - -/*! \brief Gives the string form of a given transfer capability */ -char *ast_transfercapability2str(int transfercapability) -{ - switch(transfercapability) { - case AST_TRANS_CAP_SPEECH: - return "SPEECH"; - case AST_TRANS_CAP_DIGITAL: - return "DIGITAL"; - case AST_TRANS_CAP_RESTRICTED_DIGITAL: - return "RESTRICTED_DIGITAL"; - case AST_TRANS_CAP_3_1K_AUDIO: - return "3K1AUDIO"; - case AST_TRANS_CAP_DIGITAL_W_TONES: - return "DIGITAL_W_TONES"; - case AST_TRANS_CAP_VIDEO: - return "VIDEO"; - default: - return "UNKNOWN"; - } -} - -/*! \brief Pick the best audio codec */ -int ast_best_codec(int fmts) -{ - /* This just our opinion, expressed in code. We are asked to choose - the best codec to use, given no information */ - int x; - static int prefs[] = - { - /*! Okay, ulaw is used by all telephony equipment, so start with it */ - AST_FORMAT_ULAW, - /*! Unless of course, you're a silly European, so then prefer ALAW */ - AST_FORMAT_ALAW, - /*! Okay, well, signed linear is easy to translate into other stuff */ - AST_FORMAT_SLINEAR, - /*! G.726 is standard ADPCM, in RFC3551 packing order */ - AST_FORMAT_G726, - /*! G.726 is standard ADPCM, in AAL2 packing order */ - AST_FORMAT_G726_AAL2, - /*! ADPCM has great sound quality and is still pretty easy to translate */ - AST_FORMAT_ADPCM, - /*! Okay, we're down to vocoders now, so pick GSM because it's small and easier to - translate and sounds pretty good */ - AST_FORMAT_GSM, - /*! iLBC is not too bad */ - AST_FORMAT_ILBC, - /*! Speex is free, but computationally more expensive than GSM */ - AST_FORMAT_SPEEX, - /*! Ick, LPC10 sounds terrible, but at least we have code for it, if you're tacky enough - to use it */ - AST_FORMAT_LPC10, - /*! G.729a is faster than 723 and slightly less expensive */ - AST_FORMAT_G729A, - /*! Down to G.723.1 which is proprietary but at least designed for voice */ - AST_FORMAT_G723_1, - }; - - /* Strip out video */ - fmts &= AST_FORMAT_AUDIO_MASK; - - /* Find the first preferred codec in the format given */ - for (x=0; x < (sizeof(prefs) / sizeof(prefs[0]) ); x++) - if (fmts & prefs[x]) - return prefs[x]; - ast_log(LOG_WARNING, "Don't know any of 0x%x formats\n", fmts); - return 0; -} - -static const struct ast_channel_tech null_tech = { - .type = "NULL", - .description = "Null channel (should not see this)", -}; - -/*! \brief Create a new channel structure */ -struct ast_channel *ast_channel_alloc(int needqueue) -{ - struct ast_channel *tmp; - int x; - int flags; - struct varshead *headp; - - /* If shutting down, don't allocate any new channels */ - if (shutting_down) { - ast_log(LOG_WARNING, "Channel allocation failed: Refusing due to active shutdown\n"); - return NULL; - } - - if (!(tmp = ast_calloc(1, sizeof(*tmp)))) - return NULL; - - if (!(tmp->sched = sched_context_create())) { - ast_log(LOG_WARNING, "Channel allocation failed: Unable to create schedule context\n"); - free(tmp); - return NULL; - } - - ast_string_field_init(tmp, 128); - - /* Don't bother initializing the last two FD here, because they - will *always* be set just a few lines down (AST_TIMING_FD, - AST_ALERT_FD). */ - for (x=0; x<AST_MAX_FDS - 2; x++) - tmp->fds[x] = -1; - -#ifdef HAVE_ZAPTEL - tmp->timingfd = open("/dev/zap/timer", O_RDWR); - if (tmp->timingfd > -1) { - /* Check if timing interface supports new - ping/pong scheme */ - flags = 1; - if (!ioctl(tmp->timingfd, ZT_TIMERPONG, &flags)) - needqueue = 0; - } -#else - tmp->timingfd = -1; -#endif - - if (needqueue) { - if (pipe(tmp->alertpipe)) { - ast_log(LOG_WARNING, "Channel allocation failed: Can't create alert pipe!\n"); - free(tmp); - return NULL; - } else { - flags = fcntl(tmp->alertpipe[0], F_GETFL); - fcntl(tmp->alertpipe[0], F_SETFL, flags | O_NONBLOCK); - flags = fcntl(tmp->alertpipe[1], F_GETFL); - fcntl(tmp->alertpipe[1], F_SETFL, flags | O_NONBLOCK); - } - } else /* Make sure we've got it done right if they don't */ - tmp->alertpipe[0] = tmp->alertpipe[1] = -1; - - /* Always watch the alertpipe */ - tmp->fds[AST_ALERT_FD] = tmp->alertpipe[0]; - /* And timing pipe */ - tmp->fds[AST_TIMING_FD] = tmp->timingfd; - ast_string_field_set(tmp, name, "**Unknown**"); - /* Initial state */ - tmp->_state = AST_STATE_DOWN; - tmp->streamid = -1; - tmp->appl = NULL; - tmp->data = NULL; - tmp->fin = global_fin; - tmp->fout = global_fout; - ast_mutex_lock(&uniquelock); - if (ast_strlen_zero(ast_config_AST_SYSTEM_NAME)) - ast_string_field_build(tmp, uniqueid, "%li.%d", (long) time(NULL), uniqueint++); - else - ast_string_field_build(tmp, uniqueid, "%s-%li.%d", ast_config_AST_SYSTEM_NAME, (long) time(NULL), uniqueint++); - ast_mutex_unlock(&uniquelock); - headp = &tmp->varshead; - ast_mutex_init(&tmp->lock); - AST_LIST_HEAD_INIT_NOLOCK(headp); - AST_LIST_HEAD_INIT_NOLOCK(&tmp->datastores); - strcpy(tmp->context, "default"); - ast_string_field_set(tmp, language, defaultlanguage); - strcpy(tmp->exten, "s"); - tmp->priority = 1; - tmp->amaflags = ast_default_amaflags; - ast_string_field_set(tmp, accountcode, ast_default_accountcode); - - tmp->tech = &null_tech; - - AST_LIST_LOCK(&channels); - AST_LIST_INSERT_HEAD(&channels, tmp, chan_list); - AST_LIST_UNLOCK(&channels); - return tmp; -} - -/*! \brief Queue an outgoing media frame */ -int ast_queue_frame(struct ast_channel *chan, struct ast_frame *fin) -{ - struct ast_frame *f; - struct ast_frame *prev, *cur; - int blah = 1; - int qlen = 0; - - /* Build us a copy and free the original one */ - if (!(f = ast_frdup(fin))) { - ast_log(LOG_WARNING, "Unable to duplicate frame\n"); - return -1; - } - ast_channel_lock(chan); - prev = NULL; - for (cur = chan->readq; cur; cur = cur->next) { - if ((cur->frametype == AST_FRAME_CONTROL) && (cur->subclass == AST_CONTROL_HANGUP)) { - /* Don't bother actually queueing anything after a hangup */ - ast_frfree(f); - ast_channel_unlock(chan); - return 0; - } - prev = cur; - qlen++; - } - /* Allow up to 96 voice frames outstanding, and up to 128 total frames */ - if (((fin->frametype == AST_FRAME_VOICE) && (qlen > 96)) || (qlen > 128)) { - if (fin->frametype != AST_FRAME_VOICE) { - ast_log(LOG_WARNING, "Exceptionally long queue length queuing to %s\n", chan->name); - CRASH; - } else { - ast_log(LOG_DEBUG, "Dropping voice to exceptionally long queue on %s\n", chan->name); - ast_frfree(f); - ast_channel_unlock(chan); - return 0; - } - } - if (prev) - prev->next = f; - else - chan->readq = f; - if (chan->alertpipe[1] > -1) { - if (write(chan->alertpipe[1], &blah, sizeof(blah)) != sizeof(blah)) - ast_log(LOG_WARNING, "Unable to write to alert pipe on %s, frametype/subclass %d/%d (qlen = %d): %s!\n", - chan->name, f->frametype, f->subclass, qlen, strerror(errno)); -#ifdef HAVE_ZAPTEL - } else if (chan->timingfd > -1) { - ioctl(chan->timingfd, ZT_TIMERPING, &blah); -#endif - } else if (ast_test_flag(chan, AST_FLAG_BLOCKING)) { - pthread_kill(chan->blocker, SIGURG); - } - ast_channel_unlock(chan); - return 0; -} - -/*! \brief Queue a hangup frame for channel */ -int ast_queue_hangup(struct ast_channel *chan) -{ - struct ast_frame f = { AST_FRAME_CONTROL, AST_CONTROL_HANGUP }; - /* Yeah, let's not change a lock-critical value without locking */ - if (!ast_channel_trylock(chan)) { - chan->_softhangup |= AST_SOFTHANGUP_DEV; - ast_channel_unlock(chan); - } - return ast_queue_frame(chan, &f); -} - -/*! \brief Queue a control frame */ -int ast_queue_control(struct ast_channel *chan, enum ast_control_frame_type control) -{ - struct ast_frame f = { AST_FRAME_CONTROL, }; - - f.subclass = control; - - return ast_queue_frame(chan, &f); -} - -/*! \brief Queue a control frame with payload */ -int ast_queue_control_data(struct ast_channel *chan, enum ast_control_frame_type control, - const void *data, size_t datalen) -{ - struct ast_frame f = { AST_FRAME_CONTROL, }; - - f.subclass = control; - f.data = (void *) data; - f.datalen = datalen; - - return ast_queue_frame(chan, &f); -} - -/*! \brief Set defer DTMF flag on channel */ -int ast_channel_defer_dtmf(struct ast_channel *chan) -{ - int pre = 0; - - if (chan) { - pre = ast_test_flag(chan, AST_FLAG_DEFER_DTMF); - ast_set_flag(chan, AST_FLAG_DEFER_DTMF); - } - return pre; -} - -/*! \brief Unset defer DTMF flag on channel */ -void ast_channel_undefer_dtmf(struct ast_channel *chan) -{ - if (chan) - ast_clear_flag(chan, AST_FLAG_DEFER_DTMF); -} - -/*! - * \brief Helper function to find channels. - * - * It supports these modes: - * - * prev != NULL : get channel next in list after prev - * name != NULL : get channel with matching name - * name != NULL && namelen != 0 : get channel whose name starts with prefix - * exten != NULL : get channel whose exten or macroexten matches - * context != NULL && exten != NULL : get channel whose context or macrocontext - * - * It returns with the channel's lock held. If getting the individual lock fails, - * unlock and retry quickly up to 10 times, then give up. - * - * \note XXX Note that this code has cost O(N) because of the need to verify - * that the object is still on the global list. - * - * \note XXX also note that accessing fields (e.g. c->name in ast_log()) - * can only be done with the lock held or someone could delete the - * object while we work on it. This causes some ugliness in the code. - * Note that removing the first ast_log() may be harmful, as it would - * shorten the retry period and possibly cause failures. - * We should definitely go for a better scheme that is deadlock-free. - */ -static struct ast_channel *channel_find_locked(const struct ast_channel *prev, - const char *name, const int namelen, - const char *context, const char *exten) -{ - const char *msg = prev ? "deadlock" : "initial deadlock"; - int retries; - struct ast_channel *c; - - for (retries = 0; retries < 10; retries++) { - int done; - AST_LIST_LOCK(&channels); - AST_LIST_TRAVERSE(&channels, c, chan_list) { - if (prev) { /* look for next item */ - if (c != prev) /* not this one */ - continue; - /* found, prepare to return c->next */ - c = AST_LIST_NEXT(c, chan_list); - } - if (name) { /* want match by name */ - if ((!namelen && strcasecmp(c->name, name)) || - (namelen && strncasecmp(c->name, name, namelen))) - continue; /* name match failed */ - } else if (exten) { - if (context && strcasecmp(c->context, context) && - strcasecmp(c->macrocontext, context)) - continue; /* context match failed */ - if (strcasecmp(c->exten, exten) && - strcasecmp(c->macroexten, exten)) - continue; /* exten match failed */ - } - /* if we get here, c points to the desired record */ - break; - } - /* exit if chan not found or mutex acquired successfully */ - /* this is slightly unsafe, as we _should_ hold the lock to access c->name */ - done = c == NULL || ast_channel_trylock(c) == 0; - if (!done) - ast_log(LOG_DEBUG, "Avoiding %s for channel '%p'\n", msg, c); - AST_LIST_UNLOCK(&channels); - if (done) - return c; - usleep(1); /* give other threads a chance before retrying */ - } - /* - * c is surely not null, but we don't have the lock so cannot - * access c->name - */ - ast_log(LOG_DEBUG, "Failure, could not lock '%p' after %d retries!\n", - c, retries); - - return NULL; -} - -/*! \brief Browse channels in use */ -struct ast_channel *ast_channel_walk_locked(const struct ast_channel *prev) -{ - return channel_find_locked(prev, NULL, 0, NULL, NULL); -} - -/*! \brief Get channel by name and lock it */ -struct ast_channel *ast_get_channel_by_name_locked(const char *name) -{ - return channel_find_locked(NULL, name, 0, NULL, NULL); -} - -/*! \brief Get channel by name prefix and lock it */ -struct ast_channel *ast_get_channel_by_name_prefix_locked(const char *name, const int namelen) -{ - return channel_find_locked(NULL, name, namelen, NULL, NULL); -} - -/*! \brief Get next channel by name prefix and lock it */ -struct ast_channel *ast_walk_channel_by_name_prefix_locked(const struct ast_channel *chan, const char *name, - const int namelen) -{ - return channel_find_locked(chan, name, namelen, NULL, NULL); -} - -/*! \brief Get channel by exten (and optionally context) and lock it */ -struct ast_channel *ast_get_channel_by_exten_locked(const char *exten, const char *context) -{ - return channel_find_locked(NULL, NULL, 0, context, exten); -} - -/*! \brief Get next channel by exten (and optionally context) and lock it */ -struct ast_channel *ast_walk_channel_by_exten_locked(const struct ast_channel *chan, const char *exten, - const char *context) -{ - return channel_find_locked(chan, NULL, 0, context, exten); -} - -/*! \brief Wait, look for hangups and condition arg */ -int ast_safe_sleep_conditional(struct ast_channel *chan, int ms, int (*cond)(void*), void *data) -{ - struct ast_frame *f; - - while (ms > 0) { - if (cond && ((*cond)(data) == 0)) - return 0; - ms = ast_waitfor(chan, ms); - if (ms < 0) - return -1; - if (ms > 0) { - f = ast_read(chan); - if (!f) - return -1; - ast_frfree(f); - } - } - return 0; -} - -/*! \brief Wait, look for hangups */ -int ast_safe_sleep(struct ast_channel *chan, int ms) -{ - return ast_safe_sleep_conditional(chan, ms, NULL, NULL); -} - -static void free_cid(struct ast_callerid *cid) -{ - if (cid->cid_dnid) - free(cid->cid_dnid); - if (cid->cid_num) - free(cid->cid_num); - if (cid->cid_name) - free(cid->cid_name); - if (cid->cid_ani) - free(cid->cid_ani); - if (cid->cid_rdnis) - free(cid->cid_rdnis); -} - -/*! \brief Free a channel structure */ -void ast_channel_free(struct ast_channel *chan) -{ - int fd; - struct ast_var_t *vardata; - struct ast_frame *f, *fp; - struct varshead *headp; - struct ast_datastore *datastore = NULL; - char name[AST_CHANNEL_NAME]; - - headp=&chan->varshead; - - AST_LIST_LOCK(&channels); - AST_LIST_REMOVE(&channels, chan, chan_list); - /* Lock and unlock the channel just to be sure nobody - has it locked still */ - ast_channel_lock(chan); - ast_channel_unlock(chan); - if (chan->tech_pvt) { - ast_log(LOG_WARNING, "Channel '%s' may not have been hung up properly\n", chan->name); - free(chan->tech_pvt); - } - - if (chan->sched) - sched_context_destroy(chan->sched); - - ast_copy_string(name, chan->name, sizeof(name)); - - /* Stop monitoring */ - if (chan->monitor) - chan->monitor->stop( chan, 0 ); - - /* If there is native format music-on-hold state, free it */ - if (chan->music_state) - ast_moh_cleanup(chan); - - /* if someone is whispering on the channel, stop them */ - if (chan->whisper) - ast_channel_whisper_stop(chan); - - /* Free translators */ - if (chan->readtrans) - ast_translator_free_path(chan->readtrans); - if (chan->writetrans) - ast_translator_free_path(chan->writetrans); - if (chan->pbx) - ast_log(LOG_WARNING, "PBX may not have been terminated properly on '%s'\n", chan->name); - free_cid(&chan->cid); - ast_mutex_destroy(&chan->lock); - /* Close pipes if appropriate */ - if ((fd = chan->alertpipe[0]) > -1) - close(fd); - if ((fd = chan->alertpipe[1]) > -1) - close(fd); - if ((fd = chan->timingfd) > -1) - close(fd); - f = chan->readq; - chan->readq = NULL; - while(f) { - fp = f; - f = f->next; - ast_frfree(fp); - } - - /* Get rid of each of the data stores on the channel */ - while ((datastore = AST_LIST_REMOVE_HEAD(&chan->datastores, entry))) - /* Free the data store */ - ast_channel_datastore_free(datastore); - AST_LIST_HEAD_INIT_NOLOCK(&chan->datastores); - - /* loop over the variables list, freeing all data and deleting list items */ - /* no need to lock the list, as the channel is already locked */ - - while ((vardata = AST_LIST_REMOVE_HEAD(headp, entries))) - ast_var_delete(vardata); - - /* Destroy the jitterbuffer */ - ast_jb_destroy(chan); - - ast_string_field_free_all(chan); - free(chan); - AST_LIST_UNLOCK(&channels); - - ast_device_state_changed_literal(name); -} - -struct ast_datastore *ast_channel_datastore_alloc(const struct ast_datastore_info *info, char *uid) -{ - struct ast_datastore *datastore = NULL; - - /* Make sure we at least have type so we can identify this */ - if (info == NULL) { - return NULL; - } - - /* Allocate memory for datastore and clear it */ - datastore = ast_calloc(1, sizeof(*datastore)); - if (datastore == NULL) { - return NULL; - } - - datastore->info = info; - - datastore->uid = ast_strdup(uid); - - return datastore; -} - -int ast_channel_datastore_free(struct ast_datastore *datastore) -{ - int res = 0; - - /* Using the destroy function (if present) destroy the data */ - if (datastore->info->destroy != NULL && datastore->data != NULL) { - datastore->info->destroy(datastore->data); - datastore->data = NULL; - } - - /* Free allocated UID memory */ - if (datastore->uid != NULL) { - free(datastore->uid); - datastore->uid = NULL; - } - - /* Finally free memory used by ourselves */ - free(datastore); - - return res; -} - -int ast_channel_datastore_add(struct ast_channel *chan, struct ast_datastore *datastore) -{ - int res = 0; - - AST_LIST_INSERT_HEAD(&chan->datastores, datastore, entry); - - return res; -} - -int ast_channel_datastore_remove(struct ast_channel *chan, struct ast_datastore *datastore) -{ - struct ast_datastore *datastore2 = NULL; - int res = -1; - - /* Find our position and remove ourselves */ - AST_LIST_TRAVERSE_SAFE_BEGIN(&chan->datastores, datastore2, entry) { - if (datastore2 == datastore) { - AST_LIST_REMOVE_CURRENT(&chan->datastores, entry); - res = 0; - break; - } - } - AST_LIST_TRAVERSE_SAFE_END - - return res; -} - -struct ast_datastore *ast_channel_datastore_find(struct ast_channel *chan, const struct ast_datastore_info *info, char *uid) -{ - struct ast_datastore *datastore = NULL; - - if (info == NULL) - return NULL; - - AST_LIST_TRAVERSE_SAFE_BEGIN(&chan->datastores, datastore, entry) { - if (datastore->info == info) { - if (uid != NULL && datastore->uid != NULL) { - if (!strcasecmp(uid, datastore->uid)) { - /* Matched by type AND uid */ - break; - } - } else { - /* Matched by type at least */ - break; - } - } - } - AST_LIST_TRAVERSE_SAFE_END - - return datastore; -} - -int ast_channel_spy_add(struct ast_channel *chan, struct ast_channel_spy *spy) -{ - /* Link the owner channel to the spy */ - spy->chan = chan; - - if (!ast_test_flag(spy, CHANSPY_FORMAT_AUDIO)) { - ast_log(LOG_WARNING, "Could not add channel spy '%s' to channel '%s', only audio format spies are supported.\n", - spy->type, chan->name); - return -1; - } - - if (ast_test_flag(spy, CHANSPY_READ_VOLADJUST) && (spy->read_queue.format != AST_FORMAT_SLINEAR)) { - ast_log(LOG_WARNING, "Cannot provide volume adjustment on '%s' format spies\n", - ast_getformatname(spy->read_queue.format)); - return -1; - } - - if (ast_test_flag(spy, CHANSPY_WRITE_VOLADJUST) && (spy->write_queue.format != AST_FORMAT_SLINEAR)) { - ast_log(LOG_WARNING, "Cannot provide volume adjustment on '%s' format spies\n", - ast_getformatname(spy->write_queue.format)); - return -1; - } - - if (ast_test_flag(spy, CHANSPY_MIXAUDIO) && - ((spy->read_queue.format != AST_FORMAT_SLINEAR) || - (spy->write_queue.format != AST_FORMAT_SLINEAR))) { - ast_log(LOG_WARNING, "Cannot provide audio mixing on '%s'-'%s' format spies\n", - ast_getformatname(spy->read_queue.format), ast_getformatname(spy->write_queue.format)); - return -1; - } - - if (!chan->spies) { - if (!(chan->spies = ast_calloc(1, sizeof(*chan->spies)))) { - return -1; - } - - AST_LIST_HEAD_INIT_NOLOCK(&chan->spies->list); - AST_LIST_INSERT_HEAD(&chan->spies->list, spy, list); - } else { - AST_LIST_INSERT_TAIL(&chan->spies->list, spy, list); - } - - if (ast_test_flag(spy, CHANSPY_TRIGGER_MODE) != CHANSPY_TRIGGER_NONE) { - ast_cond_init(&spy->trigger, NULL); - ast_set_flag(spy, CHANSPY_TRIGGER_READ); - ast_clear_flag(spy, CHANSPY_TRIGGER_WRITE); - } - - ast_log(LOG_DEBUG, "Spy %s added to channel %s\n", - spy->type, chan->name); - - return 0; -} - -void ast_channel_spy_stop_by_type(struct ast_channel *chan, const char *type) -{ - struct ast_channel_spy *spy; - - if (!chan->spies) - return; - - AST_LIST_TRAVERSE(&chan->spies->list, spy, list) { - ast_mutex_lock(&spy->lock); - if ((spy->type == type) && (spy->status == CHANSPY_RUNNING)) { - spy->status = CHANSPY_STOP; - if (ast_test_flag(spy, CHANSPY_TRIGGER_MODE) != CHANSPY_TRIGGER_NONE) - ast_cond_signal(&spy->trigger); - } - ast_mutex_unlock(&spy->lock); - } -} - -void ast_channel_spy_trigger_wait(struct ast_channel_spy *spy) -{ - struct timeval tv; - struct timespec ts; - - tv = ast_tvadd(ast_tvnow(), ast_samp2tv(50000, 1000)); - ts.tv_sec = tv.tv_sec; - ts.tv_nsec = tv.tv_usec * 1000; - - ast_cond_timedwait(&spy->trigger, &spy->lock, &ts); -} - -void ast_channel_spy_remove(struct ast_channel *chan, struct ast_channel_spy *spy) -{ - struct ast_frame *f; - - if (!chan->spies) - return; - - AST_LIST_REMOVE(&chan->spies->list, spy, list); - - ast_mutex_lock(&spy->lock); - - spy->chan = NULL; - - for (f = spy->read_queue.head; f; f = spy->read_queue.head) { - spy->read_queue.head = f->next; - ast_frfree(f); - } - for (f = spy->write_queue.head; f; f = spy->write_queue.head) { - spy->write_queue.head = f->next; - ast_frfree(f); - } - - if (ast_test_flag(spy, CHANSPY_TRIGGER_MODE) != CHANSPY_TRIGGER_NONE) - ast_cond_destroy(&spy->trigger); - - ast_mutex_unlock(&spy->lock); - - ast_log(LOG_DEBUG, "Spy %s removed from channel %s\n", - spy->type, chan->name); - - if (AST_LIST_EMPTY(&chan->spies->list)) { - if (chan->spies->read_translator.path) - ast_translator_free_path(chan->spies->read_translator.path); - if (chan->spies->write_translator.path) - ast_translator_free_path(chan->spies->write_translator.path); - free(chan->spies); - chan->spies = NULL; - } -} - -static void detach_spies(struct ast_channel *chan) -{ - struct ast_channel_spy *spy; - - if (!chan->spies) - return; - - /* Marking the spies as done is sufficient. Chanspy or spy users will get the picture. */ - AST_LIST_TRAVERSE(&chan->spies->list, spy, list) { - ast_mutex_lock(&spy->lock); - spy->chan = NULL; - if (spy->status == CHANSPY_RUNNING) - spy->status = CHANSPY_DONE; - if (ast_test_flag(spy, CHANSPY_TRIGGER_MODE) != CHANSPY_TRIGGER_NONE) - ast_cond_signal(&spy->trigger); - ast_mutex_unlock(&spy->lock); - } - - AST_LIST_TRAVERSE_SAFE_BEGIN(&chan->spies->list, spy, list) - ast_channel_spy_remove(chan, spy); - AST_LIST_TRAVERSE_SAFE_END; -} - -/*! \brief Softly hangup a channel, don't lock */ -int ast_softhangup_nolock(struct ast_channel *chan, int cause) -{ - if (option_debug) - ast_log(LOG_DEBUG, "Soft-Hanging up channel '%s'\n", chan->name); - /* Inform channel driver that we need to be hung up, if it cares */ - chan->_softhangup |= cause; - ast_queue_frame(chan, &ast_null_frame); - /* Interrupt any poll call or such */ - if (ast_test_flag(chan, AST_FLAG_BLOCKING)) - pthread_kill(chan->blocker, SIGURG); - return 0; -} - -/*! \brief Softly hangup a channel, lock */ -int ast_softhangup(struct ast_channel *chan, int cause) -{ - int res; - ast_channel_lock(chan); - res = ast_softhangup_nolock(chan, cause); - ast_channel_unlock(chan); - return res; -} - -enum spy_direction { - SPY_READ, - SPY_WRITE, -}; - -#define SPY_QUEUE_SAMPLE_LIMIT 4000 /* half of one second */ - -static void queue_frame_to_spies(struct ast_channel *chan, struct ast_frame *f, enum spy_direction dir) -{ - struct ast_frame *translated_frame = NULL; - struct ast_channel_spy *spy; - struct channel_spy_trans *trans; - - trans = (dir == SPY_READ) ? &chan->spies->read_translator : &chan->spies->write_translator; - - AST_LIST_TRAVERSE(&chan->spies->list, spy, list) { - struct ast_frame *last; - struct ast_frame *f1; /* the frame to append */ - struct ast_channel_spy_queue *queue; - - ast_mutex_lock(&spy->lock); - - queue = (dir == SPY_READ) ? &spy->read_queue : &spy->write_queue; - - if ((queue->format == AST_FORMAT_SLINEAR) && (f->subclass != AST_FORMAT_SLINEAR)) { - if (!translated_frame) { - if (trans->path && (trans->last_format != f->subclass)) { - ast_translator_free_path(trans->path); - trans->path = NULL; - } - if (!trans->path) { - ast_log(LOG_DEBUG, "Building translator from %s to SLINEAR for spies on channel %s\n", - ast_getformatname(f->subclass), chan->name); - if ((trans->path = ast_translator_build_path(AST_FORMAT_SLINEAR, f->subclass)) == NULL) { - ast_log(LOG_WARNING, "Cannot build a path from %s to %s\n", - ast_getformatname(f->subclass), ast_getformatname(AST_FORMAT_SLINEAR)); - ast_mutex_unlock(&spy->lock); - continue; - } else { - trans->last_format = f->subclass; - } - } - if (!(translated_frame = ast_translate(trans->path, f, 0))) { - ast_log(LOG_ERROR, "Translation to %s failed, dropping frame for spies\n", - ast_getformatname(AST_FORMAT_SLINEAR)); - ast_mutex_unlock(&spy->lock); - break; - } - } - f1 = translated_frame; - } else { - if (f->subclass != queue->format) { - ast_log(LOG_WARNING, "Spy '%s' on channel '%s' wants format '%s', but frame is '%s', dropping\n", - spy->type, chan->name, - ast_getformatname(queue->format), ast_getformatname(f->subclass)); - ast_mutex_unlock(&spy->lock); - continue; - } - f1 = f; - } - /* duplicate and append f1 to the tail */ - f1 = ast_frdup(f1); - - for (last = queue->head; last && last->next; last = last->next) - ; - if (last) - last->next = f1; - else - queue->head = f1; - - queue->samples += f->samples; - - if (queue->samples > SPY_QUEUE_SAMPLE_LIMIT) { - if (ast_test_flag(spy, CHANSPY_TRIGGER_MODE) != CHANSPY_TRIGGER_NONE) { - switch (ast_test_flag(spy, CHANSPY_TRIGGER_MODE)) { - case CHANSPY_TRIGGER_READ: - if (dir == SPY_WRITE) { - ast_set_flag(spy, CHANSPY_TRIGGER_WRITE); - ast_clear_flag(spy, CHANSPY_TRIGGER_READ); - if (option_debug) - ast_log(LOG_DEBUG, "Switching spy '%s' on '%s' to write-trigger mode\n", - spy->type, chan->name); - } - break; - case CHANSPY_TRIGGER_WRITE: - if (dir == SPY_READ) { - ast_set_flag(spy, CHANSPY_TRIGGER_READ); - ast_clear_flag(spy, CHANSPY_TRIGGER_WRITE); - if (option_debug) - ast_log(LOG_DEBUG, "Switching spy '%s' on '%s' to read-trigger mode\n", - spy->type, chan->name); - } - break; - } - if (option_debug) - ast_log(LOG_DEBUG, "Triggering queue flush for spy '%s' on '%s'\n", - spy->type, chan->name); - ast_set_flag(spy, CHANSPY_TRIGGER_FLUSH); - ast_cond_signal(&spy->trigger); - } else { - if (option_debug) - ast_log(LOG_DEBUG, "Spy '%s' on channel '%s' %s queue too long, dropping frames\n", - spy->type, chan->name, (dir == SPY_READ) ? "read" : "write"); - while (queue->samples > SPY_QUEUE_SAMPLE_LIMIT) { - struct ast_frame *drop = queue->head; - - queue->samples -= drop->samples; - queue->head = drop->next; - ast_frfree(drop); - } - } - } else { - switch (ast_test_flag(spy, CHANSPY_TRIGGER_MODE)) { - case CHANSPY_TRIGGER_READ: - if (dir == SPY_READ) - ast_cond_signal(&spy->trigger); - break; - case CHANSPY_TRIGGER_WRITE: - if (dir == SPY_WRITE) - ast_cond_signal(&spy->trigger); - break; - } - } - - ast_mutex_unlock(&spy->lock); - } - - if (translated_frame) - ast_frfree(translated_frame); -} - -static void free_translation(struct ast_channel *clone) -{ - if (clone->writetrans) - ast_translator_free_path(clone->writetrans); - if (clone->readtrans) - ast_translator_free_path(clone->readtrans); - clone->writetrans = NULL; - clone->readtrans = NULL; - clone->rawwriteformat = clone->nativeformats; - clone->rawreadformat = clone->nativeformats; -} - -/*! \brief Hangup a channel */ -int ast_hangup(struct ast_channel *chan) -{ - int res = 0; - - /* Don't actually hang up a channel that will masquerade as someone else, or - if someone is going to masquerade as us */ - ast_channel_lock(chan); - - detach_spies(chan); /* get rid of spies */ - - if (chan->masq) { - if (ast_do_masquerade(chan)) - ast_log(LOG_WARNING, "Failed to perform masquerade\n"); - } - - if (chan->masq) { - ast_log(LOG_WARNING, "%s getting hung up, but someone is trying to masq into us?!?\n", chan->name); - ast_channel_unlock(chan); - return 0; - } - /* If this channel is one which will be masqueraded into something, - mark it as a zombie already, so we know to free it later */ - if (chan->masqr) { - ast_set_flag(chan, AST_FLAG_ZOMBIE); - ast_channel_unlock(chan); - return 0; - } - free_translation(chan); - /* Close audio stream */ - if (chan->stream) { - ast_closestream(chan->stream); - chan->stream = NULL; - } - /* Close video stream */ - if (chan->vstream) { - ast_closestream(chan->vstream); - chan->vstream = NULL; - } - if (chan->sched) { - sched_context_destroy(chan->sched); - chan->sched = NULL; - } - - if (chan->generatordata) /* Clear any tone stuff remaining */ - chan->generator->release(chan, chan->generatordata); - chan->generatordata = NULL; - chan->generator = NULL; - if (chan->cdr) { /* End the CDR if it hasn't already */ - ast_cdr_end(chan->cdr); - ast_cdr_detach(chan->cdr); /* Post and Free the CDR */ - chan->cdr = NULL; - } - if (ast_test_flag(chan, AST_FLAG_BLOCKING)) { - ast_log(LOG_WARNING, "Hard hangup called by thread %ld on %s, while fd " - "is blocked by thread %ld in procedure %s! Expect a failure\n", - (long)pthread_self(), chan->name, (long)chan->blocker, chan->blockproc); - CRASH; - } - if (!ast_test_flag(chan, AST_FLAG_ZOMBIE)) { - if (option_debug) - ast_log(LOG_DEBUG, "Hanging up channel '%s'\n", chan->name); - if (chan->tech->hangup) - res = chan->tech->hangup(chan); - } else { - if (option_debug) - ast_log(LOG_DEBUG, "Hanging up zombie '%s'\n", chan->name); - } - - ast_channel_unlock(chan); - manager_event(EVENT_FLAG_CALL, "Hangup", - "Channel: %s\r\n" - "Uniqueid: %s\r\n" - "Cause: %d\r\n" - "Cause-txt: %s\r\n", - chan->name, - chan->uniqueid, - chan->hangupcause, - ast_cause2str(chan->hangupcause) - ); - ast_channel_free(chan); - return res; -} - -int ast_answer(struct ast_channel *chan) -{ - int res = 0; - ast_channel_lock(chan); - /* You can't answer an outbound call */ - if (ast_test_flag(chan, AST_FLAG_OUTGOING)) { - ast_channel_unlock(chan); - return 0; - } - /* Stop if we're a zombie or need a soft hangup */ - if (ast_test_flag(chan, AST_FLAG_ZOMBIE) || ast_check_hangup(chan)) { - ast_channel_unlock(chan); - return -1; - } - switch(chan->_state) { - case AST_STATE_RINGING: - case AST_STATE_RING: - if (chan->tech->answer) - res = chan->tech->answer(chan); - ast_setstate(chan, AST_STATE_UP); - ast_cdr_answer(chan->cdr); - break; - case AST_STATE_UP: - ast_cdr_answer(chan->cdr); - break; - default: - break; - } - ast_channel_unlock(chan); - return res; -} - -void ast_deactivate_generator(struct ast_channel *chan) -{ - ast_channel_lock(chan); - if (chan->generatordata) { - if (chan->generator && chan->generator->release) - chan->generator->release(chan, chan->generatordata); - chan->generatordata = NULL; - chan->generator = NULL; - chan->fds[AST_GENERATOR_FD] = -1; - ast_clear_flag(chan, AST_FLAG_WRITE_INT); - ast_settimeout(chan, 0, NULL, NULL); - } - ast_channel_unlock(chan); -} - -static int generator_force(void *data) -{ - /* Called if generator doesn't have data */ - void *tmp; - int res; - int (*generate)(struct ast_channel *chan, void *tmp, int datalen, int samples); - struct ast_channel *chan = data; - tmp = chan->generatordata; - chan->generatordata = NULL; - generate = chan->generator->generate; - res = generate(chan, tmp, 0, 160); - chan->generatordata = tmp; - if (res) { - ast_log(LOG_DEBUG, "Auto-deactivating generator\n"); - ast_deactivate_generator(chan); - } - return 0; -} - -int ast_activate_generator(struct ast_channel *chan, struct ast_generator *gen, void *params) -{ - int res = 0; - - ast_channel_lock(chan); - - if (chan->generatordata) { - if (chan->generator && chan->generator->release) - chan->generator->release(chan, chan->generatordata); - chan->generatordata = NULL; - } - - ast_prod(chan); - if (gen->alloc && !(chan->generatordata = gen->alloc(chan, params))) { - res = -1; - } - - if (!res) { - ast_settimeout(chan, 160, generator_force, chan); - chan->generator = gen; - } - - ast_channel_unlock(chan); - - return res; -} - -/*! \brief Wait for x amount of time on a file descriptor to have input. */ -int ast_waitfor_n_fd(int *fds, int n, int *ms, int *exception) -{ - int winner = -1; - ast_waitfor_nandfds(NULL, 0, fds, n, exception, &winner, ms); - return winner; -} - -/*! \brief Wait for x amount of time on a file descriptor to have input. */ -struct ast_channel *ast_waitfor_nandfds(struct ast_channel **c, int n, int *fds, int nfds, - int *exception, int *outfd, int *ms) -{ - struct timeval start = { 0 , 0 }; - struct pollfd *pfds; - int res; - long rms; - int x, y, max; - int sz; - time_t now = 0; - long whentohangup = 0, diff; - struct ast_channel *winner = NULL; - struct fdmap { - int chan; - int fdno; - } *fdmap; - - sz = n * AST_MAX_FDS + nfds; - pfds = alloca(sizeof(*pfds) * sz); - fdmap = alloca(sizeof(*fdmap) * sz); - - if (outfd) - *outfd = -99999; - if (exception) - *exception = 0; - - /* Perform any pending masquerades */ - for (x=0; x < n; x++) { - ast_channel_lock(c[x]); - if (c[x]->masq) { - if (ast_do_masquerade(c[x])) { - ast_log(LOG_WARNING, "Masquerade failed\n"); - *ms = -1; - ast_channel_unlock(c[x]); - return NULL; - } - } - if (c[x]->whentohangup) { - if (!whentohangup) - time(&now); - diff = c[x]->whentohangup - now; - if (diff < 1) { - /* Should already be hungup */ - c[x]->_softhangup |= AST_SOFTHANGUP_TIMEOUT; - ast_channel_unlock(c[x]); - return c[x]; - } - if (!whentohangup || (diff < whentohangup)) - whentohangup = diff; - } - ast_channel_unlock(c[x]); - } - /* Wait full interval */ - rms = *ms; - if (whentohangup) { - rms = (whentohangup - now) * 1000; /* timeout in milliseconds */ - if (*ms >= 0 && *ms < rms) /* original *ms still smaller */ - rms = *ms; - } - /* - * Build the pollfd array, putting the channels' fds first, - * followed by individual fds. Order is important because - * individual fd's must have priority over channel fds. - */ - max = 0; - for (x=0; x<n; x++) { - for (y=0; y<AST_MAX_FDS; y++) { - fdmap[max].fdno = y; /* fd y is linked to this pfds */ - fdmap[max].chan = x; /* channel x is linked to this pfds */ - max += ast_add_fd(&pfds[max], c[x]->fds[y]); - } - CHECK_BLOCKING(c[x]); - } - /* Add the individual fds */ - for (x=0; x<nfds; x++) { - fdmap[max].chan = -1; - max += ast_add_fd(&pfds[max], fds[x]); - } - - if (*ms > 0) - start = ast_tvnow(); - - if (sizeof(int) == 4) { /* XXX fix timeout > 600000 on linux x86-32 */ - do { - int kbrms = rms; - if (kbrms > 600000) - kbrms = 600000; - res = poll(pfds, max, kbrms); - if (!res) - rms -= kbrms; - } while (!res && (rms > 0)); - } else { - res = poll(pfds, max, rms); - } - for (x=0; x<n; x++) - ast_clear_flag(c[x], AST_FLAG_BLOCKING); - if (res < 0) { /* Simulate a timeout if we were interrupted */ - if (errno != EINTR) - *ms = -1; - return NULL; - } - if (whentohangup) { /* if we have a timeout, check who expired */ - time(&now); - for (x=0; x<n; x++) { - if (c[x]->whentohangup && now >= c[x]->whentohangup) { - c[x]->_softhangup |= AST_SOFTHANGUP_TIMEOUT; - if (winner == NULL) - winner = c[x]; - } - } - } - if (res == 0) { /* no fd ready, reset timeout and done */ - *ms = 0; /* XXX use 0 since we may not have an exact timeout. */ - return winner; - } - /* - * Then check if any channel or fd has a pending event. - * Remember to check channels first and fds last, as they - * must have priority on setting 'winner' - */ - for (x = 0; x < max; x++) { - res = pfds[x].revents; - if (res == 0) - continue; - if (fdmap[x].chan >= 0) { /* this is a channel */ - winner = c[fdmap[x].chan]; /* override previous winners */ - if (res & POLLPRI) - ast_set_flag(winner, AST_FLAG_EXCEPTION); - else - ast_clear_flag(winner, AST_FLAG_EXCEPTION); - winner->fdno = fdmap[x].fdno; - } else { /* this is an fd */ - if (outfd) - *outfd = pfds[x].fd; - if (exception) - *exception = (res & POLLPRI) ? -1 : 0; - winner = NULL; - } - } - if (*ms > 0) { - *ms -= ast_tvdiff_ms(ast_tvnow(), start); - if (*ms < 0) - *ms = 0; - } - return winner; -} - -struct ast_channel *ast_waitfor_n(struct ast_channel **c, int n, int *ms) -{ - return ast_waitfor_nandfds(c, n, NULL, 0, NULL, NULL, ms); -} - -int ast_waitfor(struct ast_channel *c, int ms) -{ - int oldms = ms; /* -1 if no timeout */ - - ast_waitfor_nandfds(&c, 1, NULL, 0, NULL, NULL, &ms); - if ((ms < 0) && (oldms < 0)) - ms = 0; - return ms; -} - -/* XXX never to be called with ms = -1 */ -int ast_waitfordigit(struct ast_channel *c, int ms) -{ - return ast_waitfordigit_full(c, ms, -1, -1); -} - -int ast_settimeout(struct ast_channel *c, int samples, int (*func)(void *data), void *data) -{ - int res = -1; -#ifdef HAVE_ZAPTEL - if (c->timingfd > -1) { - if (!func) { - samples = 0; - data = 0; - } - ast_log(LOG_DEBUG, "Scheduling timer at %d sample intervals\n", samples); - res = ioctl(c->timingfd, ZT_TIMERCONFIG, &samples); - c->timingfunc = func; - c->timingdata = data; - } -#endif - return res; -} - -int ast_waitfordigit_full(struct ast_channel *c, int ms, int audiofd, int cmdfd) -{ - - /* Stop if we're a zombie or need a soft hangup */ - if (ast_test_flag(c, AST_FLAG_ZOMBIE) || ast_check_hangup(c)) - return -1; - /* Wait for a digit, no more than ms milliseconds total. */ - while (ms) { - struct ast_channel *rchan; - int outfd; - - errno = 0; - rchan = ast_waitfor_nandfds(&c, 1, &cmdfd, (cmdfd > -1) ? 1 : 0, NULL, &outfd, &ms); - if (!rchan && outfd < 0 && ms) { - if (errno == 0 || errno == EINTR) - continue; - ast_log(LOG_WARNING, "Wait failed (%s)\n", strerror(errno)); - return -1; - } else if (outfd > -1) { - /* The FD we were watching has something waiting */ - return 1; - } else if (rchan) { - int res; - struct ast_frame *f = ast_read(c); - if (!f) - return -1; - - switch(f->frametype) { - case AST_FRAME_DTMF: - res = f->subclass; - ast_frfree(f); - return res; - case AST_FRAME_CONTROL: - switch(f->subclass) { - case AST_CONTROL_HANGUP: - ast_frfree(f); - return -1; - case AST_CONTROL_RINGING: - case AST_CONTROL_ANSWER: - /* Unimportant */ - break; - default: - ast_log(LOG_WARNING, "Unexpected control subclass '%d'\n", f->subclass); - } - case AST_FRAME_VOICE: - /* Write audio if appropriate */ - if (audiofd > -1) - write(audiofd, f->data, f->datalen); - } - /* Ignore */ - ast_frfree(f); - } - } - return 0; /* Time is up */ -} - -static struct ast_frame *__ast_read(struct ast_channel *chan, int dropaudio) -{ - struct ast_frame *f = NULL; /* the return value */ - int blah; - int prestate; - - /* this function is very long so make sure there is only one return - * point at the end (there is only one exception to this). - */ - ast_channel_lock(chan); - if (chan->masq) { - if (ast_do_masquerade(chan)) { - ast_log(LOG_WARNING, "Failed to perform masquerade\n"); - } else { - f = &ast_null_frame; - } - goto done; - } - - /* Stop if we're a zombie or need a soft hangup */ - if (ast_test_flag(chan, AST_FLAG_ZOMBIE) || ast_check_hangup(chan)) { - if (chan->generator) - ast_deactivate_generator(chan); - goto done; - } - prestate = chan->_state; - - if (!ast_test_flag(chan, AST_FLAG_DEFER_DTMF) && !ast_strlen_zero(chan->dtmfq)) { - /* We have DTMF that has been deferred. Return it now */ - chan->dtmff.frametype = AST_FRAME_DTMF; - chan->dtmff.subclass = chan->dtmfq[0]; - /* Drop first digit from the buffer */ - memmove(chan->dtmfq, chan->dtmfq + 1, sizeof(chan->dtmfq) - 1); - f = &chan->dtmff; - goto done; - } - - /* Read and ignore anything on the alertpipe, but read only - one sizeof(blah) per frame that we send from it */ - if (chan->alertpipe[0] > -1) - read(chan->alertpipe[0], &blah, sizeof(blah)); - -#ifdef HAVE_ZAPTEL - if (chan->timingfd > -1 && chan->fdno == AST_TIMING_FD && ast_test_flag(chan, AST_FLAG_EXCEPTION)) { - int res; - - ast_clear_flag(chan, AST_FLAG_EXCEPTION); - blah = -1; - /* IF we can't get event, assume it's an expired as-per the old interface */ - res = ioctl(chan->timingfd, ZT_GETEVENT, &blah); - if (res) - blah = ZT_EVENT_TIMER_EXPIRED; - - if (blah == ZT_EVENT_TIMER_PING) { - if (!chan->readq || !chan->readq->next) { - /* Acknowledge PONG unless we need it again */ - if (ioctl(chan->timingfd, ZT_TIMERPONG, &blah)) { - ast_log(LOG_WARNING, "Failed to pong timer on '%s': %s\n", chan->name, strerror(errno)); - } - } - } else if (blah == ZT_EVENT_TIMER_EXPIRED) { - ioctl(chan->timingfd, ZT_TIMERACK, &blah); - if (chan->timingfunc) { - /* save a copy of func/data before unlocking the channel */ - int (*func)(void *) = chan->timingfunc; - void *data = chan->timingdata; - ast_channel_unlock(chan); - func(data); - } else { - blah = 0; - ioctl(chan->timingfd, ZT_TIMERCONFIG, &blah); - chan->timingdata = NULL; - ast_channel_unlock(chan); - } - /* cannot 'goto done' because the channel is already unlocked */ - return &ast_null_frame; - } else - ast_log(LOG_NOTICE, "No/unknown event '%d' on timer for '%s'?\n", blah, chan->name); - } else -#endif - if (chan->fds[AST_GENERATOR_FD] > -1 && chan->fdno == AST_GENERATOR_FD) { - /* if the AST_GENERATOR_FD is set, call the generator with args - * set to -1 so it can do whatever it needs to. - */ - void *tmp = chan->generatordata; - chan->generatordata = NULL; /* reset to let ast_write get through */ - chan->generator->generate(chan, tmp, -1, -1); - chan->generatordata = tmp; - f = &ast_null_frame; - goto done; - } - - /* Check for pending read queue */ - if (chan->readq) { - f = chan->readq; - chan->readq = f->next; - f->next = NULL; - /* Interpret hangup and return NULL */ - /* XXX why not the same for frames from the channel ? */ - if (f->frametype == AST_FRAME_CONTROL && f->subclass == AST_CONTROL_HANGUP) { - ast_frfree(f); - f = NULL; - } - } else { - chan->blocker = pthread_self(); - if (ast_test_flag(chan, AST_FLAG_EXCEPTION)) { - if (chan->tech->exception) - f = chan->tech->exception(chan); - else { - ast_log(LOG_WARNING, "Exception flag set on '%s', but no exception handler\n", chan->name); - f = &ast_null_frame; - } - /* Clear the exception flag */ - ast_clear_flag(chan, AST_FLAG_EXCEPTION); - } else if (chan->tech->read) - f = chan->tech->read(chan); - else - ast_log(LOG_WARNING, "No read routine on channel %s\n", chan->name); - } - - if (f) { - /* if the channel driver returned more than one frame, stuff the excess - into the readq for the next ast_read call - */ - if (f->next) { - chan->readq = f->next; - f->next = NULL; - } - - switch (f->frametype) { - case AST_FRAME_CONTROL: - if (f->subclass == AST_CONTROL_ANSWER) { - if (!ast_test_flag(chan, AST_FLAG_OUTGOING)) { - ast_log(LOG_DEBUG, "Ignoring answer on an inbound call!\n"); - ast_frfree(f); - f = &ast_null_frame; - } else if (prestate == AST_STATE_UP) { - ast_log(LOG_DEBUG, "Dropping duplicate answer!\n"); - ast_frfree(f); - f = &ast_null_frame; - } else { - /* Answer the CDR */ - ast_setstate(chan, AST_STATE_UP); - ast_cdr_answer(chan->cdr); - } - } - break; - case AST_FRAME_DTMF: - ast_log(LOG_DTMF, "DTMF '%c' received on %s\n", f->subclass, chan->name); - if (ast_test_flag(chan, AST_FLAG_DEFER_DTMF)) { - if (strlen(chan->dtmfq) < sizeof(chan->dtmfq) - 2) - chan->dtmfq[strlen(chan->dtmfq)] = f->subclass; - else - ast_log(LOG_WARNING, "Dropping deferred DTMF digits on %s\n", chan->name); - ast_frfree(f); - f = &ast_null_frame; - } - break; - case AST_FRAME_DTMF_BEGIN: - ast_log(LOG_DTMF, "DTMF begin '%c' received on %s\n", f->subclass, chan->name); - break; - case AST_FRAME_DTMF_END: - ast_log(LOG_DTMF, "DTMF end '%c' received on %s\n", f->subclass, chan->name); - break; - case AST_FRAME_VOICE: - if (dropaudio) { - ast_frfree(f); - f = &ast_null_frame; - } else if (!(f->subclass & chan->nativeformats)) { - /* This frame can't be from the current native formats -- drop it on the - floor */ - ast_log(LOG_NOTICE, "Dropping incompatible voice frame on %s of format %s since our native format has changed to %s\n", - chan->name, ast_getformatname(f->subclass), ast_getformatname(chan->nativeformats)); - ast_frfree(f); - f = &ast_null_frame; - } else { - if (chan->spies) - queue_frame_to_spies(chan, f, SPY_READ); - - if (chan->monitor && chan->monitor->read_stream ) { - /* XXX what does this do ? */ -#ifndef MONITOR_CONSTANT_DELAY - int jump = chan->outsmpl - chan->insmpl - 4 * f->samples; - if (jump >= 0) { - if (ast_seekstream(chan->monitor->read_stream, jump + f->samples, SEEK_FORCECUR) == -1) - ast_log(LOG_WARNING, "Failed to perform seek in monitoring read stream, synchronization between the files may be broken\n"); - chan->insmpl += jump + 4 * f->samples; - } else - chan->insmpl+= f->samples; -#else - int jump = chan->outsmpl - chan->insmpl; - if (jump - MONITOR_DELAY >= 0) { - if (ast_seekstream(chan->monitor->read_stream, jump - f->samples, SEEK_FORCECUR) == -1) - ast_log(LOG_WARNING, "Failed to perform seek in monitoring read stream, synchronization between the files may be broken\n"); - chan->insmpl += jump; - } else - chan->insmpl += f->samples; -#endif - if (chan->monitor->state == AST_MONITOR_RUNNING) { - if (ast_writestream(chan->monitor->read_stream, f) < 0) - ast_log(LOG_WARNING, "Failed to write data to channel monitor read stream\n"); - } - } - - if (chan->readtrans && (f = ast_translate(chan->readtrans, f, 1)) == NULL) - f = &ast_null_frame; - - /* Run generator sitting on the line if timing device not available - * and synchronous generation of outgoing frames is necessary */ - if (chan->generatordata && !ast_internal_timing_enabled(chan)) { - void *tmp = chan->generatordata; - int res; - - if (chan->timingfunc) { - if (option_debug > 1) - ast_log(LOG_DEBUG, "Generator got voice, switching to phase locked mode\n"); - ast_settimeout(chan, 0, NULL, NULL); - } - - chan->generatordata = NULL; /* reset, to let writes go through */ - res = chan->generator->generate(chan, tmp, f->datalen, f->samples); - chan->generatordata = tmp; - if (res) { - if (option_debug > 1) - ast_log(LOG_DEBUG, "Auto-deactivating generator\n"); - ast_deactivate_generator(chan); - } - - } else if (f->frametype == AST_FRAME_CNG) { - if (chan->generator && !chan->timingfunc && (chan->timingfd > -1)) { - if (option_debug > 1) - ast_log(LOG_DEBUG, "Generator got CNG, switching to timed mode\n"); - ast_settimeout(chan, 160, generator_force, chan); - } - } - } - } - } else { - /* Make sure we always return NULL in the future */ - chan->_softhangup |= AST_SOFTHANGUP_DEV; - if (chan->generator) - ast_deactivate_generator(chan); - /* End the CDR if appropriate */ - if (chan->cdr) - ast_cdr_end(chan->cdr); - } - - /* High bit prints debugging */ - if (chan->fin & DEBUGCHAN_FLAG) - ast_frame_dump(chan->name, f, "<<"); - chan->fin = FRAMECOUNT_INC(chan->fin); - -done: - ast_channel_unlock(chan); - return f; -} - -int ast_internal_timing_enabled(struct ast_channel *chan) -{ - int ret = ast_opt_internal_timing && chan->timingfd > -1; - if (option_debug > 4) - ast_log(LOG_DEBUG, "Internal timing is %s (option_internal_timing=%d chan->timingfd=%d)\n", ret? "enabled": "disabled", ast_opt_internal_timing, chan->timingfd); - return ret; -} - -struct ast_frame *ast_read(struct ast_channel *chan) -{ - return __ast_read(chan, 0); -} - -struct ast_frame *ast_read_noaudio(struct ast_channel *chan) -{ - return __ast_read(chan, 1); -} - -int ast_indicate(struct ast_channel *chan, int condition) -{ - return ast_indicate_data(chan, condition, NULL, 0); -} - -int ast_indicate_data(struct ast_channel *chan, int condition, const void *data, size_t datalen) -{ - int res = -1; - - ast_channel_lock(chan); - /* Stop if we're a zombie or need a soft hangup */ - if (ast_test_flag(chan, AST_FLAG_ZOMBIE) || ast_check_hangup(chan)) { - ast_channel_unlock(chan); - return -1; - } - if (chan->tech->indicate) - res = chan->tech->indicate(chan, condition, data, datalen); - ast_channel_unlock(chan); - if (!chan->tech->indicate || res) { - /* - * Device does not support (that) indication, lets fake - * it by doing our own tone generation. (PM2002) - */ - if (condition < 0) - ast_playtones_stop(chan); - else { - const struct tone_zone_sound *ts = NULL; - switch (condition) { - case AST_CONTROL_RINGING: - ts = ast_get_indication_tone(chan->zone, "ring"); - break; - case AST_CONTROL_BUSY: - ts = ast_get_indication_tone(chan->zone, "busy"); - break; - case AST_CONTROL_CONGESTION: - ts = ast_get_indication_tone(chan->zone, "congestion"); - break; - } - if (ts && ts->data[0]) { - ast_log(LOG_DEBUG, "Driver for channel '%s' does not support indication %d, emulating it\n", chan->name, condition); - ast_playtones_start(chan,0,ts->data, 1); - res = 0; - } else if (condition == AST_CONTROL_PROGRESS) { - /* ast_playtones_stop(chan); */ - } else if (condition == AST_CONTROL_PROCEEDING) { - /* Do nothing, really */ - } else if (condition == AST_CONTROL_HOLD) { - /* Do nothing.... */ - } else if (condition == AST_CONTROL_UNHOLD) { - /* Do nothing.... */ - } else if (condition == AST_CONTROL_VIDUPDATE) { - /* Do nothing.... */ - } else { - /* not handled */ - ast_log(LOG_WARNING, "Unable to handle indication %d for '%s'\n", condition, chan->name); - res = -1; - } - } - } - return res; -} - -int ast_recvchar(struct ast_channel *chan, int timeout) -{ - int c; - char *buf = ast_recvtext(chan, timeout); - if (buf == NULL) - return -1; /* error or timeout */ - c = *(unsigned char *)buf; - free(buf); - return c; -} - -char *ast_recvtext(struct ast_channel *chan, int timeout) -{ - int res, done = 0; - char *buf = NULL; - - while (!done) { - struct ast_frame *f; - if (ast_check_hangup(chan)) - break; - res = ast_waitfor(chan, timeout); - if (res <= 0) /* timeout or error */ - break; - timeout = res; /* update timeout */ - f = ast_read(chan); - if (f == NULL) - break; /* no frame */ - if (f->frametype == AST_FRAME_CONTROL && f->subclass == AST_CONTROL_HANGUP) - done = 1; /* force a break */ - else if (f->frametype == AST_FRAME_TEXT) { /* what we want */ - buf = ast_strndup((char *) f->data, f->datalen); /* dup and break */ - done = 1; - } - ast_frfree(f); - } - return buf; -} - -int ast_sendtext(struct ast_channel *chan, const char *text) -{ - int res = 0; - /* Stop if we're a zombie or need a soft hangup */ - if (ast_test_flag(chan, AST_FLAG_ZOMBIE) || ast_check_hangup(chan)) - return -1; - CHECK_BLOCKING(chan); - if (chan->tech->send_text) - res = chan->tech->send_text(chan, text); - ast_clear_flag(chan, AST_FLAG_BLOCKING); - return res; -} - -static int do_senddigit(struct ast_channel *chan, char digit) -{ - int res = -1; - - if (chan->tech->send_digit) - res = chan->tech->send_digit(chan, digit); - if (res) { - /* - * Device does not support DTMF tones, lets fake - * it by doing our own generation. (PM2002) - */ - static const char* dtmf_tones[] = { - "!941+1336/100,!0/100", /* 0 */ - "!697+1209/100,!0/100", /* 1 */ - "!697+1336/100,!0/100", /* 2 */ - "!697+1477/100,!0/100", /* 3 */ - "!770+1209/100,!0/100", /* 4 */ - "!770+1336/100,!0/100", /* 5 */ - "!770+1477/100,!0/100", /* 6 */ - "!852+1209/100,!0/100", /* 7 */ - "!852+1336/100,!0/100", /* 8 */ - "!852+1477/100,!0/100", /* 9 */ - "!697+1633/100,!0/100", /* A */ - "!770+1633/100,!0/100", /* B */ - "!852+1633/100,!0/100", /* C */ - "!941+1633/100,!0/100", /* D */ - "!941+1209/100,!0/100", /* * */ - "!941+1477/100,!0/100" }; /* # */ - if (digit >= '0' && digit <='9') - ast_playtones_start(chan, 0, dtmf_tones[digit-'0'], 0); - else if (digit >= 'A' && digit <= 'D') - ast_playtones_start(chan, 0, dtmf_tones[digit-'A'+10], 0); - else if (digit == '*') - ast_playtones_start(chan, 0, dtmf_tones[14], 0); - else if (digit == '#') - ast_playtones_start(chan, 0, dtmf_tones[15], 0); - else { - /* not handled */ - ast_log(LOG_DEBUG, "Unable to generate DTMF tone '%c' for '%s'\n", digit, chan->name); - } - } - return 0; -} - -int ast_senddigit(struct ast_channel *chan, char digit) -{ - return do_senddigit(chan, digit); -} - -int ast_prod(struct ast_channel *chan) -{ - struct ast_frame a = { AST_FRAME_VOICE }; - char nothing[128]; - - /* Send an empty audio frame to get things moving */ - if (chan->_state != AST_STATE_UP) { - ast_log(LOG_DEBUG, "Prodding channel '%s'\n", chan->name); - a.subclass = chan->rawwriteformat; - a.data = nothing + AST_FRIENDLY_OFFSET; - a.src = "ast_prod"; - if (ast_write(chan, &a)) - ast_log(LOG_WARNING, "Prodding channel '%s' failed\n", chan->name); - } - return 0; -} - -int ast_write_video(struct ast_channel *chan, struct ast_frame *fr) -{ - int res; - if (!chan->tech->write_video) - return 0; - res = ast_write(chan, fr); - if (!res) - res = 1; - return res; -} - -int ast_write(struct ast_channel *chan, struct ast_frame *fr) -{ - int res = -1; - struct ast_frame *f = NULL; - - /* Stop if we're a zombie or need a soft hangup */ - ast_channel_lock(chan); - if (ast_test_flag(chan, AST_FLAG_ZOMBIE) || ast_check_hangup(chan)) - goto done; - - /* Handle any pending masquerades */ - if (chan->masq && ast_do_masquerade(chan)) { - ast_log(LOG_WARNING, "Failed to perform masquerade\n"); - goto done; - } - if (chan->masqr) { - res = 0; /* XXX explain, why 0 ? */ - goto done; - } - if (chan->generatordata) { - if (ast_test_flag(chan, AST_FLAG_WRITE_INT)) - ast_deactivate_generator(chan); - else { - res = 0; /* XXX explain, why 0 ? */ - goto done; - } - } - /* High bit prints debugging */ - if (chan->fout & DEBUGCHAN_FLAG) - ast_frame_dump(chan->name, fr, ">>"); - CHECK_BLOCKING(chan); - switch(fr->frametype) { - case AST_FRAME_CONTROL: - res = (chan->tech->indicate == NULL) ? 0 : - chan->tech->indicate(chan, fr->subclass, fr->data, fr->datalen); - break; - case AST_FRAME_DTMF_BEGIN: - res = (chan->tech->send_digit_begin == NULL) ? 0 : - chan->tech->send_digit_begin(chan, fr->subclass); - break; - case AST_FRAME_DTMF_END: - res = (chan->tech->send_digit_end == NULL) ? 0 : - chan->tech->send_digit_end(chan); - break; - case AST_FRAME_DTMF: - ast_clear_flag(chan, AST_FLAG_BLOCKING); - ast_channel_unlock(chan); - res = do_senddigit(chan,fr->subclass); - ast_channel_lock(chan); - CHECK_BLOCKING(chan); - break; - case AST_FRAME_TEXT: - res = (chan->tech->send_text == NULL) ? 0 : - chan->tech->send_text(chan, (char *) fr->data); - break; - case AST_FRAME_HTML: - res = (chan->tech->send_html == NULL) ? 0 : - chan->tech->send_html(chan, fr->subclass, (char *) fr->data, fr->datalen); - break; - case AST_FRAME_VIDEO: - /* XXX Handle translation of video codecs one day XXX */ - res = (chan->tech->write_video == NULL) ? 0 : - chan->tech->write_video(chan, fr); - break; - case AST_FRAME_MODEM: - res = (chan->tech->write == NULL) ? 0 : - chan->tech->write(chan, fr); - break; - case AST_FRAME_VOICE: - if (chan->tech->write == NULL) - break; /*! \todo XXX should return 0 maybe ? */ - - /* Bypass translator if we're writing format in the raw write format. This - allows mixing of native / non-native formats */ - if (fr->subclass == chan->rawwriteformat) - f = fr; - else - f = (chan->writetrans) ? ast_translate(chan->writetrans, fr, 0) : fr; - if (f == NULL) { - res = 0; - } else { - if (chan->spies) - queue_frame_to_spies(chan, f, SPY_WRITE); - - if (chan->monitor && chan->monitor->write_stream) { - /* XXX must explain this code */ -#ifndef MONITOR_CONSTANT_DELAY - int jump = chan->insmpl - chan->outsmpl - 4 * f->samples; - if (jump >= 0) { - if (ast_seekstream(chan->monitor->write_stream, jump + f->samples, SEEK_FORCECUR) == -1) - ast_log(LOG_WARNING, "Failed to perform seek in monitoring write stream, synchronization between the files may be broken\n"); - chan->outsmpl += jump + 4 * f->samples; - } else - chan->outsmpl += f->samples; -#else - int jump = chan->insmpl - chan->outsmpl; - if (jump - MONITOR_DELAY >= 0) { - if (ast_seekstream(chan->monitor->write_stream, jump - f->samples, SEEK_FORCECUR) == -1) - ast_log(LOG_WARNING, "Failed to perform seek in monitoring write stream, synchronization between the files may be broken\n"); - chan->outsmpl += jump; - } else - chan->outsmpl += f->samples; -#endif - if (chan->monitor->state == AST_MONITOR_RUNNING) { - if (ast_writestream(chan->monitor->write_stream, f) < 0) - ast_log(LOG_WARNING, "Failed to write data to channel monitor write stream\n"); - } - } - - if (ast_test_flag(chan, AST_FLAG_WHISPER)) { - /* frame is assumed to be in SLINEAR, since that is - required for whisper mode */ - ast_frame_adjust_volume(f, -2); - if (ast_slinfactory_available(&chan->whisper->sf) >= f->samples) { - short buf[f->samples]; - struct ast_frame whisper = { - .frametype = AST_FRAME_VOICE, - .subclass = AST_FORMAT_SLINEAR, - .data = buf, - .datalen = sizeof(buf), - .samples = f->samples, - }; - - ast_mutex_lock(&chan->whisper->lock); - if (ast_slinfactory_read(&chan->whisper->sf, buf, f->samples)) - ast_frame_slinear_sum(f, &whisper); - ast_mutex_unlock(&chan->whisper->lock); - } - } - - res = chan->tech->write(chan, f); - } - break; - } - - if (f && f != fr) - ast_frfree(f); - ast_clear_flag(chan, AST_FLAG_BLOCKING); - /* Consider a write failure to force a soft hangup */ - if (res < 0) - chan->_softhangup |= AST_SOFTHANGUP_DEV; - else { - chan->fout = FRAMECOUNT_INC(chan->fout); - } -done: - ast_channel_unlock(chan); - return res; -} - -static int set_format(struct ast_channel *chan, int fmt, int *rawformat, int *format, - struct ast_trans_pvt **trans, const int direction) -{ - int native; - int res; - - /* Make sure we only consider audio */ - fmt &= AST_FORMAT_AUDIO_MASK; - - native = chan->nativeformats; - /* Find a translation path from the native format to one of the desired formats */ - if (!direction) - /* reading */ - res = ast_translator_best_choice(&fmt, &native); - else - /* writing */ - res = ast_translator_best_choice(&native, &fmt); - - if (res < 0) { - ast_log(LOG_WARNING, "Unable to find a codec translation path from %s to %s\n", - ast_getformatname(native), ast_getformatname(fmt)); - return -1; - } - - /* Now we have a good choice for both. */ - ast_channel_lock(chan); - - if ((*rawformat == native) && (*format == fmt)) { - /* the channel is already in these formats, so nothing to do */ - ast_channel_unlock(chan); - return 0; - } - - *rawformat = native; - /* User perspective is fmt */ - *format = fmt; - /* Free any read translation we have right now */ - if (*trans) - ast_translator_free_path(*trans); - /* Build a translation path from the raw format to the desired format */ - if (!direction) - /* reading */ - *trans = ast_translator_build_path(*format, *rawformat); - else - /* writing */ - *trans = ast_translator_build_path(*rawformat, *format); - ast_channel_unlock(chan); - if (option_debug) - ast_log(LOG_DEBUG, "Set channel %s to %s format %s\n", chan->name, - direction ? "write" : "read", ast_getformatname(fmt)); - return 0; -} - -int ast_set_read_format(struct ast_channel *chan, int fmt) -{ - return set_format(chan, fmt, &chan->rawreadformat, &chan->readformat, - &chan->readtrans, 0); -} - -int ast_set_write_format(struct ast_channel *chan, int fmt) -{ - return set_format(chan, fmt, &chan->rawwriteformat, &chan->writeformat, - &chan->writetrans, 1); -} - -struct ast_channel *__ast_request_and_dial(const char *type, int format, void *data, int timeout, int *outstate, const char *cid_num, const char *cid_name, struct outgoing_helper *oh) -{ - int dummy_outstate; - int cause = 0; - struct ast_channel *chan; - int res = 0; - - if (outstate) - *outstate = 0; - else - outstate = &dummy_outstate; /* make outstate always a valid pointer */ - - chan = ast_request(type, format, data, &cause); - if (!chan) { - ast_log(LOG_NOTICE, "Unable to request channel %s/%s\n", type, (char *)data); - /* compute error and return */ - if (cause == AST_CAUSE_BUSY) - *outstate = AST_CONTROL_BUSY; - else if (cause == AST_CAUSE_CONGESTION) - *outstate = AST_CONTROL_CONGESTION; - return NULL; - } - - if (oh) { - if (oh->vars) - ast_set_variables(chan, oh->vars); - /* XXX why is this necessary, for the parent_channel perhaps ? */ - if (!ast_strlen_zero(oh->cid_num) && !ast_strlen_zero(oh->cid_name)) - ast_set_callerid(chan, oh->cid_num, oh->cid_name, oh->cid_num); - if (oh->parent_channel) - ast_channel_inherit_variables(oh->parent_channel, chan); - if (oh->account) - ast_cdr_setaccount(chan, oh->account); - } - ast_set_callerid(chan, cid_num, cid_name, cid_num); - - if (ast_call(chan, data, 0)) { /* ast_call failed... */ - ast_log(LOG_NOTICE, "Unable to call channel %s/%s\n", type, (char *)data); - } else { - res = 1; /* mark success in case chan->_state is already AST_STATE_UP */ - while (timeout && chan->_state != AST_STATE_UP) { - struct ast_frame *f; - res = ast_waitfor(chan, timeout); - if (res <= 0) /* error, timeout, or done */ - break; - if (timeout > -1) - timeout = res; - f = ast_read(chan); - if (!f) { - *outstate = AST_CONTROL_HANGUP; - res = 0; - break; - } - if (f->frametype == AST_FRAME_CONTROL) { - switch (f->subclass) { - case AST_CONTROL_RINGING: /* record but keep going */ - *outstate = f->subclass; - break; - - case AST_CONTROL_BUSY: - case AST_CONTROL_CONGESTION: - case AST_CONTROL_ANSWER: - *outstate = f->subclass; - timeout = 0; /* trick to force exit from the while() */ - break; - - /* Ignore these */ - case AST_CONTROL_PROGRESS: - case AST_CONTROL_PROCEEDING: - case AST_CONTROL_HOLD: - case AST_CONTROL_UNHOLD: - case AST_CONTROL_VIDUPDATE: - case -1: /* Ignore -- just stopping indications */ - break; - - default: - ast_log(LOG_NOTICE, "Don't know what to do with control frame %d\n", f->subclass); - } - } - ast_frfree(f); - } - } - - /* Final fixups */ - if (oh) { - if (!ast_strlen_zero(oh->context)) - ast_copy_string(chan->context, oh->context, sizeof(chan->context)); - if (!ast_strlen_zero(oh->exten)) - ast_copy_string(chan->exten, oh->exten, sizeof(chan->exten)); - if (oh->priority) - chan->priority = oh->priority; - } - if (chan->_state == AST_STATE_UP) - *outstate = AST_CONTROL_ANSWER; - - if (res <= 0) { - if (!chan->cdr && (chan->cdr = ast_cdr_alloc())) - ast_cdr_init(chan->cdr, chan); - if (chan->cdr) { - char tmp[256]; - snprintf(tmp, sizeof(tmp), "%s/%s", type, (char *)data); - ast_cdr_setapp(chan->cdr,"Dial",tmp); - ast_cdr_update(chan); - ast_cdr_start(chan->cdr); - ast_cdr_end(chan->cdr); - /* If the cause wasn't handled properly */ - if (ast_cdr_disposition(chan->cdr,chan->hangupcause)) - ast_cdr_failed(chan->cdr); - } - ast_hangup(chan); - chan = NULL; - } - return chan; -} - -struct ast_channel *ast_request_and_dial(const char *type, int format, void *data, int timeout, int *outstate, const char *cidnum, const char *cidname) -{ - return __ast_request_and_dial(type, format, data, timeout, outstate, cidnum, cidname, NULL); -} - -struct ast_channel *ast_request(const char *type, int format, void *data, int *cause) -{ - struct chanlist *chan; - struct ast_channel *c; - int capabilities; - int fmt; - int res; - int foo; - int videoformat = format & AST_FORMAT_VIDEO_MASK; - - if (!cause) - cause = &foo; - *cause = AST_CAUSE_NOTDEFINED; - - if (AST_LIST_LOCK(&channels)) { - ast_log(LOG_WARNING, "Unable to lock channel list\n"); - return NULL; - } - - AST_LIST_TRAVERSE(&backends, chan, list) { - if (strcasecmp(type, chan->tech->type)) - continue; - - capabilities = chan->tech->capabilities; - fmt = format & AST_FORMAT_AUDIO_MASK; - res = ast_translator_best_choice(&fmt, &capabilities); - if (res < 0) { - ast_log(LOG_WARNING, "No translator path exists for channel type %s (native %d) to %d\n", type, chan->tech->capabilities, format); - AST_LIST_UNLOCK(&channels); - return NULL; - } - AST_LIST_UNLOCK(&channels); - if (!chan->tech->requester) - return NULL; - - if (!(c = chan->tech->requester(type, capabilities | videoformat, data, cause))) - return NULL; - - if (c->_state == AST_STATE_DOWN) { - manager_event(EVENT_FLAG_CALL, "Newchannel", - "Channel: %s\r\n" - "State: %s\r\n" - "CallerID: %s\r\n" - "CallerIDName: %s\r\n" - "Uniqueid: %s\r\n", - c->name, ast_state2str(c->_state), - S_OR(c->cid.cid_num, "<unknown>"), - S_OR(c->cid.cid_name, "<unknown>"), - c->uniqueid); - } - return c; - } - - ast_log(LOG_WARNING, "No channel type registered for '%s'\n", type); - *cause = AST_CAUSE_NOSUCHDRIVER; - AST_LIST_UNLOCK(&channels); - - return NULL; -} - -int ast_call(struct ast_channel *chan, char *addr, int timeout) -{ - /* Place an outgoing call, but don't wait any longer than timeout ms before returning. - If the remote end does not answer within the timeout, then do NOT hang up, but - return anyway. */ - int res = -1; - /* Stop if we're a zombie or need a soft hangup */ - ast_channel_lock(chan); - if (!ast_test_flag(chan, AST_FLAG_ZOMBIE) && !ast_check_hangup(chan)) { - if (chan->tech->call) - res = chan->tech->call(chan, addr, timeout); - ast_set_flag(chan, AST_FLAG_OUTGOING); - } - ast_channel_unlock(chan); - return res; -} - -/*! - \brief Transfer a call to dest, if the channel supports transfer - - Called by: - \arg app_transfer - \arg the manager interface -*/ -int ast_transfer(struct ast_channel *chan, char *dest) -{ - int res = -1; - - /* Stop if we're a zombie or need a soft hangup */ - ast_channel_lock(chan); - if (!ast_test_flag(chan, AST_FLAG_ZOMBIE) && !ast_check_hangup(chan)) { - if (chan->tech->transfer) { - res = chan->tech->transfer(chan, dest); - if (!res) - res = 1; - } else - res = 0; - } - ast_channel_unlock(chan); - return res; -} - -int ast_readstring(struct ast_channel *c, char *s, int len, int timeout, int ftimeout, char *enders) -{ - return ast_readstring_full(c, s, len, timeout, ftimeout, enders, -1, -1); -} - -int ast_readstring_full(struct ast_channel *c, char *s, int len, int timeout, int ftimeout, char *enders, int audiofd, int ctrlfd) -{ - int pos = 0; /* index in the buffer where we accumulate digits */ - int to = ftimeout; - - /* Stop if we're a zombie or need a soft hangup */ - if (ast_test_flag(c, AST_FLAG_ZOMBIE) || ast_check_hangup(c)) - return -1; - if (!len) - return -1; - for (;;) { - int d; - if (c->stream) { - d = ast_waitstream_full(c, AST_DIGIT_ANY, audiofd, ctrlfd); - ast_stopstream(c); - usleep(1000); - if (!d) - d = ast_waitfordigit_full(c, to, audiofd, ctrlfd); - } else { - d = ast_waitfordigit_full(c, to, audiofd, ctrlfd); - } - if (d < 0) - return -1; - if (d == 0) { - s[pos]='\0'; - return 1; - } - if (d == 1) { - s[pos]='\0'; - return 2; - } - if (!strchr(enders, d)) - s[pos++] = d; - if (strchr(enders, d) || (pos >= len)) { - s[pos]='\0'; - return 0; - } - to = timeout; - } - /* Never reached */ - return 0; -} - -int ast_channel_supports_html(struct ast_channel *chan) -{ - return (chan->tech->send_html) ? 1 : 0; -} - -int ast_channel_sendhtml(struct ast_channel *chan, int subclass, const char *data, int datalen) -{ - if (chan->tech->send_html) - return chan->tech->send_html(chan, subclass, data, datalen); - return -1; -} - -int ast_channel_sendurl(struct ast_channel *chan, const char *url) -{ - return ast_channel_sendhtml(chan, AST_HTML_URL, url, strlen(url) + 1); -} - -int ast_channel_make_compatible(struct ast_channel *chan, struct ast_channel *peer) -{ - int src; - int dst; - - /* Set up translation from the chan to the peer */ - src = chan->nativeformats; - dst = peer->nativeformats; - if (ast_translator_best_choice(&dst, &src) < 0) { - ast_log(LOG_WARNING, "No path to translate from %s(%d) to %s(%d)\n", chan->name, src, peer->name, dst); - return -1; - } - - /* if the best path is not 'pass through', then - transcoding is needed; if desired, force transcode path - to use SLINEAR between channels, but only if there is - no direct conversion available */ - if ((src != dst) && ast_opt_transcode_via_slin && - (ast_translate_path_steps(dst, src) != 1)) - dst = AST_FORMAT_SLINEAR; - if (ast_set_read_format(chan, dst) < 0) { - ast_log(LOG_WARNING, "Unable to set read format on channel %s to %d\n", chan->name, dst); - return -1; - } - if (ast_set_write_format(peer, dst) < 0) { - ast_log(LOG_WARNING, "Unable to set write format on channel %s to %d\n", peer->name, dst); - return -1; - } - - /* Set up translation from the peer to the chan */ - src = peer->nativeformats; - dst = chan->nativeformats; - if (ast_translator_best_choice(&dst, &src) < 0) { - ast_log(LOG_WARNING, "No path to translate from %s(%d) to %s(%d)\n", peer->name, src, chan->name, dst); - return -1; - } - - /* if the best path is not 'pass through', then - transcoding is needed; if desired, force transcode path - to use SLINEAR between channels, but only if there is - no direct conversion available */ - if ((src != dst) && ast_opt_transcode_via_slin && - (ast_translate_path_steps(dst, src) != 1)) - dst = AST_FORMAT_SLINEAR; - if (ast_set_read_format(peer, dst) < 0) { - ast_log(LOG_WARNING, "Unable to set read format on channel %s to %d\n", peer->name, dst); - return -1; - } - if (ast_set_write_format(chan, dst) < 0) { - ast_log(LOG_WARNING, "Unable to set write format on channel %s to %d\n", chan->name, dst); - return -1; - } - return 0; -} - -int ast_channel_masquerade(struct ast_channel *original, struct ast_channel *clone) -{ - int res = -1; - struct ast_channel *final_orig = original, *final_clone = clone; - - ast_channel_lock(original); - while (ast_channel_trylock(clone)) { - ast_channel_unlock(original); - usleep(1); - ast_channel_lock(original); - } - - /* each of these channels may be sitting behind a channel proxy (i.e. chan_agent) - and if so, we don't really want to masquerade it, but its proxy */ - if (original->_bridge && (original->_bridge != ast_bridged_channel(original))) - final_orig = original->_bridge; - - if (clone->_bridge && (clone->_bridge != ast_bridged_channel(clone))) - final_clone = clone->_bridge; - - if ((final_orig != original) || (final_clone != clone)) { - ast_channel_lock(final_orig); - while (ast_channel_trylock(final_clone)) { - ast_channel_unlock(final_orig); - usleep(1); - ast_channel_lock(final_orig); - } - ast_channel_unlock(clone); - ast_channel_unlock(original); - original = final_orig; - clone = final_clone; - } - - if (original == clone) { - ast_log(LOG_WARNING, "Can't masquerade channel '%s' into itself!\n", original->name); - ast_channel_unlock(clone); - ast_channel_unlock(original); - return -1; - } - - ast_log(LOG_DEBUG, "Planning to masquerade channel %s into the structure of %s\n", - clone->name, original->name); - if (original->masq) { - ast_log(LOG_WARNING, "%s is already going to masquerade as %s\n", - original->masq->name, original->name); - } else if (clone->masqr) { - ast_log(LOG_WARNING, "%s is already going to masquerade as %s\n", - clone->name, clone->masqr->name); - } else { - original->masq = clone; - clone->masqr = original; - ast_queue_frame(original, &ast_null_frame); - ast_queue_frame(clone, &ast_null_frame); - ast_log(LOG_DEBUG, "Done planning to masquerade channel %s into the structure of %s\n", clone->name, original->name); - res = 0; - } - - ast_channel_unlock(clone); - ast_channel_unlock(original); - - return res; -} - -void ast_change_name(struct ast_channel *chan, char *newname) -{ - manager_event(EVENT_FLAG_CALL, "Rename", "Oldname: %s\r\nNewname: %s\r\nUniqueid: %s\r\n", chan->name, newname, chan->uniqueid); - ast_string_field_set(chan, name, newname); -} - -void ast_channel_inherit_variables(const struct ast_channel *parent, struct ast_channel *child) -{ - struct ast_var_t *current, *newvar; - const char *varname; - - AST_LIST_TRAVERSE(&parent->varshead, current, entries) { - int vartype = 0; - - varname = ast_var_full_name(current); - if (!varname) - continue; - - if (varname[0] == '_') { - vartype = 1; - if (varname[1] == '_') - vartype = 2; - } - - switch (vartype) { - case 1: - newvar = ast_var_assign(&varname[1], ast_var_value(current)); - if (newvar) { - AST_LIST_INSERT_TAIL(&child->varshead, newvar, entries); - if (option_debug) - ast_log(LOG_DEBUG, "Copying soft-transferable variable %s.\n", ast_var_name(newvar)); - } - break; - case 2: - newvar = ast_var_assign(ast_var_full_name(current), ast_var_value(current)); - if (newvar) { - AST_LIST_INSERT_TAIL(&child->varshead, newvar, entries); - if (option_debug) - ast_log(LOG_DEBUG, "Copying hard-transferable variable %s.\n", ast_var_name(newvar)); - } - break; - default: - if (option_debug) - ast_log(LOG_DEBUG, "Not copying variable %s.\n", ast_var_name(current)); - break; - } - } -} - -/*! - \brief Clone channel variables from 'clone' channel into 'original' channel - - All variables except those related to app_groupcount are cloned. - Variables are actually _removed_ from 'clone' channel, presumably - because it will subsequently be destroyed. - - \note Assumes locks will be in place on both channels when called. -*/ -static void clone_variables(struct ast_channel *original, struct ast_channel *clone) -{ - struct ast_var_t *varptr; - - /* we need to remove all app_groupcount related variables from the original - channel before merging in the clone's variables; any groups assigned to the - original channel should be released, only those assigned to the clone - should remain - */ - - AST_LIST_TRAVERSE_SAFE_BEGIN(&original->varshead, varptr, entries) { - if (!strncmp(ast_var_name(varptr), GROUP_CATEGORY_PREFIX, strlen(GROUP_CATEGORY_PREFIX))) { - AST_LIST_REMOVE(&original->varshead, varptr, entries); - ast_var_delete(varptr); - } - } - AST_LIST_TRAVERSE_SAFE_END; - - /* Append variables from clone channel into original channel */ - /* XXX Is this always correct? We have to in order to keep MACROS working XXX */ - if (AST_LIST_FIRST(&clone->varshead)) - AST_LIST_INSERT_TAIL(&original->varshead, AST_LIST_FIRST(&clone->varshead), entries); -} - -/*! - \brief Masquerade a channel - - \note Assumes channel will be locked when called -*/ -int ast_do_masquerade(struct ast_channel *original) -{ - int x,i; - int res=0; - int origstate; - struct ast_frame *cur, *prev; - const struct ast_channel_tech *t; - void *t_pvt; - struct ast_callerid tmpcid; - struct ast_channel *clone = original->masq; - int rformat = original->readformat; - int wformat = original->writeformat; - char newn[100]; - char orig[100]; - char masqn[100]; - char zombn[100]; - - if (option_debug > 3) - ast_log(LOG_DEBUG, "Actually Masquerading %s(%d) into the structure of %s(%d)\n", - clone->name, clone->_state, original->name, original->_state); - - /* XXX This is a seriously wacked out operation. We're essentially putting the guts of - the clone channel into the original channel. Start by killing off the original - channel's backend. I'm not sure we're going to keep this function, because - while the features are nice, the cost is very high in terms of pure nastiness. XXX */ - - /* We need the clone's lock, too */ - ast_channel_lock(clone); - - if (option_debug > 1) - ast_log(LOG_DEBUG, "Got clone lock for masquerade on '%s' at %p\n", clone->name, &clone->lock); - - /* Having remembered the original read/write formats, we turn off any translation on either - one */ - free_translation(clone); - free_translation(original); - - - /* Unlink the masquerade */ - original->masq = NULL; - clone->masqr = NULL; - - /* Save the original name */ - ast_copy_string(orig, original->name, sizeof(orig)); - /* Save the new name */ - ast_copy_string(newn, clone->name, sizeof(newn)); - /* Create the masq name */ - snprintf(masqn, sizeof(masqn), "%s<MASQ>", newn); - - /* Copy the name from the clone channel */ - ast_string_field_set(original, name, newn); - - /* Mangle the name of the clone channel */ - ast_string_field_set(clone, name, masqn); - - /* Notify any managers of the change, first the masq then the other */ - manager_event(EVENT_FLAG_CALL, "Rename", "Oldname: %s\r\nNewname: %s\r\nUniqueid: %s\r\n", newn, masqn, clone->uniqueid); - manager_event(EVENT_FLAG_CALL, "Rename", "Oldname: %s\r\nNewname: %s\r\nUniqueid: %s\r\n", orig, newn, original->uniqueid); - - /* Swap the technologies */ - t = original->tech; - original->tech = clone->tech; - clone->tech = t; - - t_pvt = original->tech_pvt; - original->tech_pvt = clone->tech_pvt; - clone->tech_pvt = t_pvt; - - /* Swap the readq's */ - cur = original->readq; - original->readq = clone->readq; - clone->readq = cur; - - /* Swap the alertpipes */ - for (i = 0; i < 2; i++) { - x = original->alertpipe[i]; - original->alertpipe[i] = clone->alertpipe[i]; - clone->alertpipe[i] = x; - } - - /* Swap the raw formats */ - x = original->rawreadformat; - original->rawreadformat = clone->rawreadformat; - clone->rawreadformat = x; - x = original->rawwriteformat; - original->rawwriteformat = clone->rawwriteformat; - clone->rawwriteformat = x; - - /* Save any pending frames on both sides. Start by counting - * how many we're going to need... */ - prev = NULL; - x = 0; - for (cur = clone->readq; cur; cur = cur->next) { - x++; - prev = cur; - } - /* If we had any, prepend them to the ones already in the queue, and - * load up the alertpipe */ - if (prev) { - prev->next = original->readq; - original->readq = clone->readq; - clone->readq = NULL; - if (original->alertpipe[1] > -1) { - for (i = 0; i < x; i++) - write(original->alertpipe[1], &x, sizeof(x)); - } - } - clone->_softhangup = AST_SOFTHANGUP_DEV; - - - /* And of course, so does our current state. Note we need not - call ast_setstate since the event manager doesn't really consider - these separate. We do this early so that the clone has the proper - state of the original channel. */ - origstate = original->_state; - original->_state = clone->_state; - clone->_state = origstate; - - if (clone->tech->fixup){ - res = clone->tech->fixup(original, clone); - if (res) - ast_log(LOG_WARNING, "Fixup failed on channel %s, strange things may happen.\n", clone->name); - } - - /* Start by disconnecting the original's physical side */ - if (clone->tech->hangup) - res = clone->tech->hangup(clone); - if (res) { - ast_log(LOG_WARNING, "Hangup failed! Strange things may happen!\n"); - ast_channel_unlock(clone); - return -1; - } - - snprintf(zombn, sizeof(zombn), "%s<ZOMBIE>", orig); - /* Mangle the name of the clone channel */ - ast_string_field_set(clone, name, zombn); - manager_event(EVENT_FLAG_CALL, "Rename", "Oldname: %s\r\nNewname: %s\r\nUniqueid: %s\r\n", masqn, zombn, clone->uniqueid); - - /* Update the type. */ - t_pvt = original->monitor; - original->monitor = clone->monitor; - clone->monitor = t_pvt; - - /* Keep the same language. */ - ast_string_field_set(original, language, clone->language); - /* Copy the FD's other than the generator fd */ - for (x = 0; x < AST_MAX_FDS; x++) { - if (x != AST_GENERATOR_FD) - original->fds[x] = clone->fds[x]; - } - - /* move any whisperer over */ - ast_channel_whisper_stop(original); - if (ast_test_flag(clone, AST_FLAG_WHISPER)) { - original->whisper = clone->whisper; - ast_set_flag(original, AST_FLAG_WHISPER); - clone->whisper = NULL; - ast_clear_flag(clone, AST_FLAG_WHISPER); - } - - /* Move data stores over */ - if (AST_LIST_FIRST(&clone->datastores)) - AST_LIST_INSERT_TAIL(&original->datastores, AST_LIST_FIRST(&clone->datastores), entry); - AST_LIST_HEAD_INIT_NOLOCK(&clone->datastores); - - clone_variables(original, clone); - AST_LIST_HEAD_INIT_NOLOCK(&clone->varshead); - /* Presense of ADSI capable CPE follows clone */ - original->adsicpe = clone->adsicpe; - /* Bridge remains the same */ - /* CDR fields remain the same */ - /* XXX What about blocking, softhangup, blocker, and lock and blockproc? XXX */ - /* Application and data remain the same */ - /* Clone exception becomes real one, as with fdno */ - ast_copy_flags(original, clone, AST_FLAG_EXCEPTION); - original->fdno = clone->fdno; - /* Schedule context remains the same */ - /* Stream stuff stays the same */ - /* Keep the original state. The fixup code will need to work with it most likely */ - - /* Just swap the whole structures, nevermind the allocations, they'll work themselves - out. */ - tmpcid = original->cid; - original->cid = clone->cid; - clone->cid = tmpcid; - - /* Restore original timing file descriptor */ - original->fds[AST_TIMING_FD] = original->timingfd; - - /* Our native formats are different now */ - original->nativeformats = clone->nativeformats; - - /* Context, extension, priority, app data, jump table, remain the same */ - /* pvt switches. pbx stays the same, as does next */ - - /* Set the write format */ - ast_set_write_format(original, wformat); - - /* Set the read format */ - ast_set_read_format(original, rformat); - - /* Copy the music class */ - ast_string_field_set(original, musicclass, clone->musicclass); - - if (option_debug) - ast_log(LOG_DEBUG, "Putting channel %s in %d/%d formats\n", original->name, wformat, rformat); - - /* Okay. Last thing is to let the channel driver know about all this mess, so he - can fix up everything as best as possible */ - if (original->tech->fixup) { - res = original->tech->fixup(clone, original); - if (res) { - ast_log(LOG_WARNING, "Channel for type '%s' could not fixup channel %s\n", - original->tech->type, original->name); - ast_channel_unlock(clone); - return -1; - } - } else - ast_log(LOG_WARNING, "Channel type '%s' does not have a fixup routine (for %s)! Bad things may happen.\n", - original->tech->type, original->name); - - /* Now, at this point, the "clone" channel is totally F'd up. We mark it as - a zombie so nothing tries to touch it. If it's already been marked as a - zombie, then free it now (since it already is considered invalid). */ - if (ast_test_flag(clone, AST_FLAG_ZOMBIE)) { - if (option_debug) - ast_log(LOG_DEBUG, "Destroying channel clone '%s'\n", clone->name); - ast_channel_unlock(clone); - manager_event(EVENT_FLAG_CALL, "Hangup", - "Channel: %s\r\n" - "Uniqueid: %s\r\n" - "Cause: %d\r\n" - "Cause-txt: %s\r\n", - clone->name, - clone->uniqueid, - clone->hangupcause, - ast_cause2str(clone->hangupcause) - ); - ast_channel_free(clone); - } else { - ast_log(LOG_DEBUG, "Released clone lock on '%s'\n", clone->name); - ast_set_flag(clone, AST_FLAG_ZOMBIE); - ast_queue_frame(clone, &ast_null_frame); - ast_channel_unlock(clone); - } - - /* Signal any blocker */ - if (ast_test_flag(original, AST_FLAG_BLOCKING)) - pthread_kill(original->blocker, SIGURG); - if (option_debug) - ast_log(LOG_DEBUG, "Done Masquerading %s (%d)\n", original->name, original->_state); - return 0; -} - -void ast_set_callerid(struct ast_channel *chan, const char *callerid, const char *calleridname, const char *ani) -{ - if (callerid) { - if (chan->cid.cid_num) - free(chan->cid.cid_num); - chan->cid.cid_num = ast_strdup(callerid); - } - if (calleridname) { - if (chan->cid.cid_name) - free(chan->cid.cid_name); - chan->cid.cid_name = ast_strdup(calleridname); - } - if (ani) { - if (chan->cid.cid_ani) - free(chan->cid.cid_ani); - chan->cid.cid_ani = ast_strdup(ani); - } - if (chan->cdr) - ast_cdr_setcid(chan->cdr, chan); - manager_event(EVENT_FLAG_CALL, "Newcallerid", - "Channel: %s\r\n" - "CallerID: %s\r\n" - "CallerIDName: %s\r\n" - "Uniqueid: %s\r\n" - "CID-CallingPres: %d (%s)\r\n", - chan->name, - S_OR(chan->cid.cid_num, "<Unknown>"), - S_OR(chan->cid.cid_name, "<Unknown>"), - chan->uniqueid, - chan->cid.cid_pres, - ast_describe_caller_presentation(chan->cid.cid_pres) - ); -} - -int ast_setstate(struct ast_channel *chan, enum ast_channel_state state) -{ - int oldstate = chan->_state; - - if (oldstate == state) - return 0; - - chan->_state = state; - ast_device_state_changed_literal(chan->name); - manager_event(EVENT_FLAG_CALL, - (oldstate == AST_STATE_DOWN) ? "Newchannel" : "Newstate", - "Channel: %s\r\n" - "State: %s\r\n" - "CallerID: %s\r\n" - "CallerIDName: %s\r\n" - "Uniqueid: %s\r\n", - chan->name, ast_state2str(chan->_state), - S_OR(chan->cid.cid_num, "<unknown>"), - S_OR(chan->cid.cid_name, "<unknown>"), - chan->uniqueid); - - return 0; -} - -/*! \brief Find bridged channel */ -struct ast_channel *ast_bridged_channel(struct ast_channel *chan) -{ - struct ast_channel *bridged; - bridged = chan->_bridge; - if (bridged && bridged->tech->bridged_channel) - bridged = bridged->tech->bridged_channel(chan, bridged); - return bridged; -} - -static void bridge_playfile(struct ast_channel *chan, struct ast_channel *peer, const char *sound, int remain) -{ - int min = 0, sec = 0, check; - - check = ast_autoservice_start(peer); - if (check) - return; - - if (remain > 0) { - if (remain / 60 > 1) { - min = remain / 60; - sec = remain % 60; - } else { - sec = remain; - } - } - - if (!strcmp(sound,"timeleft")) { /* Queue support */ - ast_stream_and_wait(chan, "vm-youhave", chan->language, ""); - if (min) { - ast_say_number(chan, min, AST_DIGIT_ANY, chan->language, NULL); - ast_stream_and_wait(chan, "queue-minutes", chan->language, ""); - } - if (sec) { - ast_say_number(chan, sec, AST_DIGIT_ANY, chan->language, NULL); - ast_stream_and_wait(chan, "queue-seconds", chan->language, ""); - } - } else { - ast_stream_and_wait(chan, sound, chan->language, ""); - } - - ast_autoservice_stop(peer); -} - -static enum ast_bridge_result ast_generic_bridge(struct ast_channel *c0, struct ast_channel *c1, - struct ast_bridge_config *config, struct ast_frame **fo, - struct ast_channel **rc, struct timeval bridge_end) -{ - /* Copy voice back and forth between the two channels. */ - struct ast_channel *cs[3]; - struct ast_frame *f; - enum ast_bridge_result res = AST_BRIDGE_COMPLETE; - int o0nativeformats; - int o1nativeformats; - int watch_c0_dtmf; - int watch_c1_dtmf; - void *pvt0, *pvt1; - /* Indicates whether a frame was queued into a jitterbuffer */ - int frame_put_in_jb = 0; - int jb_in_use; - int to; - - cs[0] = c0; - cs[1] = c1; - pvt0 = c0->tech_pvt; - pvt1 = c1->tech_pvt; - o0nativeformats = c0->nativeformats; - o1nativeformats = c1->nativeformats; - watch_c0_dtmf = config->flags & AST_BRIDGE_DTMF_CHANNEL_0; - watch_c1_dtmf = config->flags & AST_BRIDGE_DTMF_CHANNEL_1; - - /* Check the need of a jitterbuffer for each channel */ - jb_in_use = ast_jb_do_usecheck(c0, c1); - - for (;;) { - struct ast_channel *who, *other; - - if ((c0->tech_pvt != pvt0) || (c1->tech_pvt != pvt1) || - (o0nativeformats != c0->nativeformats) || - (o1nativeformats != c1->nativeformats)) { - /* Check for Masquerade, codec changes, etc */ - res = AST_BRIDGE_RETRY; - break; - } - if (bridge_end.tv_sec) { - to = ast_tvdiff_ms(bridge_end, ast_tvnow()); - if (to <= 0) { - res = AST_BRIDGE_RETRY; - break; - } - } else - to = -1; - /* Calculate the appropriate max sleep interval - in general, this is the time, - left to the closest jb delivery moment */ - if (jb_in_use) - to = ast_jb_get_when_to_wakeup(c0, c1, to); - who = ast_waitfor_n(cs, 2, &to); - if (!who) { - /* No frame received within the specified timeout - check if we have to deliver now */ - if (jb_in_use) - ast_jb_get_and_deliver(c0, c1); - if (c0->_softhangup == AST_SOFTHANGUP_UNBRIDGE || c1->_softhangup == AST_SOFTHANGUP_UNBRIDGE) { - if (c0->_softhangup == AST_SOFTHANGUP_UNBRIDGE) - c0->_softhangup = 0; - if (c1->_softhangup == AST_SOFTHANGUP_UNBRIDGE) - c1->_softhangup = 0; - c0->_bridge = c1; - c1->_bridge = c0; - } - continue; - } - f = ast_read(who); - if (!f) { - *fo = NULL; - *rc = who; - ast_log(LOG_DEBUG, "Didn't get a frame from channel: %s\n",who->name); - break; - } - - other = (who == c0) ? c1 : c0; /* the 'other' channel */ - /* Try add the frame info the who's bridged channel jitterbuff */ - if (jb_in_use) - frame_put_in_jb = !ast_jb_put(other, f); - - if ((f->frametype == AST_FRAME_CONTROL) && !(config->flags & AST_BRIDGE_IGNORE_SIGS)) { - int bridge_exit = 0; - - switch (f->subclass) { - case AST_CONTROL_HOLD: - case AST_CONTROL_UNHOLD: - case AST_CONTROL_VIDUPDATE: - ast_indicate_data(other, f->subclass, f->data, f->datalen); - break; - default: - *fo = f; - *rc = who; - bridge_exit = 1; - ast_log(LOG_DEBUG, "Got a FRAME_CONTROL (%d) frame on channel %s\n", f->subclass, who->name); - break; - } - if (bridge_exit) - break; - } - if ((f->frametype == AST_FRAME_VOICE) || - (f->frametype == AST_FRAME_DTMF) || - (f->frametype == AST_FRAME_VIDEO) || - (f->frametype == AST_FRAME_IMAGE) || - (f->frametype == AST_FRAME_HTML) || - (f->frametype == AST_FRAME_MODEM) || - (f->frametype == AST_FRAME_TEXT)) { - /* monitored dtmf causes exit from bridge */ - int monitored_source = (who == c0) ? watch_c0_dtmf : watch_c1_dtmf; - - if (f->frametype == AST_FRAME_DTMF && monitored_source) { - *fo = f; - *rc = who; - ast_log(LOG_DEBUG, "Got DTMF on channel (%s)\n", who->name); - break; - } - /* Write immediately frames, not passed through jb */ - if (!frame_put_in_jb) - ast_write(other, f); - - /* Check if we have to deliver now */ - if (jb_in_use) - ast_jb_get_and_deliver(c0, c1); - } - /* XXX do we want to pass on also frames not matched above ? */ - ast_frfree(f); - - /* Swap who gets priority */ - cs[2] = cs[0]; - cs[0] = cs[1]; - cs[1] = cs[2]; - } - return res; -} - -/*! \brief Bridge two channels together */ -enum ast_bridge_result ast_channel_bridge(struct ast_channel *c0, struct ast_channel *c1, - struct ast_bridge_config *config, struct ast_frame **fo, struct ast_channel **rc) -{ - struct ast_channel *who = NULL; - enum ast_bridge_result res = AST_BRIDGE_COMPLETE; - int nativefailed=0; - int firstpass; - int o0nativeformats; - int o1nativeformats; - long time_left_ms=0; - struct timeval nexteventts = { 0, }; - char caller_warning = 0; - char callee_warning = 0; - - if (c0->_bridge) { - ast_log(LOG_WARNING, "%s is already in a bridge with %s\n", - c0->name, c0->_bridge->name); - return -1; - } - if (c1->_bridge) { - ast_log(LOG_WARNING, "%s is already in a bridge with %s\n", - c1->name, c1->_bridge->name); - return -1; - } - - /* Stop if we're a zombie or need a soft hangup */ - if (ast_test_flag(c0, AST_FLAG_ZOMBIE) || ast_check_hangup_locked(c0) || - ast_test_flag(c1, AST_FLAG_ZOMBIE) || ast_check_hangup_locked(c1)) - return -1; - - *fo = NULL; - firstpass = config->firstpass; - config->firstpass = 0; - - if (ast_tvzero(config->start_time)) - config->start_time = ast_tvnow(); - time_left_ms = config->timelimit; - - caller_warning = ast_test_flag(&config->features_caller, AST_FEATURE_PLAY_WARNING); - callee_warning = ast_test_flag(&config->features_callee, AST_FEATURE_PLAY_WARNING); - - if (config->start_sound && firstpass) { - if (caller_warning) - bridge_playfile(c0, c1, config->start_sound, time_left_ms / 1000); - if (callee_warning) - bridge_playfile(c1, c0, config->start_sound, time_left_ms / 1000); - } - - /* Keep track of bridge */ - c0->_bridge = c1; - c1->_bridge = c0; - - /* \todo XXX here should check that cid_num is not NULL */ - manager_event(EVENT_FLAG_CALL, "Link", - "Channel1: %s\r\n" - "Channel2: %s\r\n" - "Uniqueid1: %s\r\n" - "Uniqueid2: %s\r\n" - "CallerID1: %s\r\n" - "CallerID2: %s\r\n", - c0->name, c1->name, c0->uniqueid, c1->uniqueid, c0->cid.cid_num, c1->cid.cid_num); - - o0nativeformats = c0->nativeformats; - o1nativeformats = c1->nativeformats; - - if (config->feature_timer) { - nexteventts = ast_tvadd(config->start_time, ast_samp2tv(config->feature_timer, 1000)); - } else if (config->timelimit) { - nexteventts = ast_tvadd(config->start_time, ast_samp2tv(config->timelimit, 1000)); - if (caller_warning || callee_warning) - nexteventts = ast_tvsub(nexteventts, ast_samp2tv(config->play_warning, 1000)); - } - - for (/* ever */;;) { - struct timeval now = { 0, }; - int to; - - to = -1; - - if (!ast_tvzero(nexteventts)) { - now = ast_tvnow(); - to = ast_tvdiff_ms(nexteventts, now); - if (to < 0) - to = 0; - } - - if (config->timelimit) { - time_left_ms = config->timelimit - ast_tvdiff_ms(now, config->start_time); - if (time_left_ms < to) - to = time_left_ms; - - if (time_left_ms <= 0) { - if (caller_warning && config->end_sound) - bridge_playfile(c0, c1, config->end_sound, 0); - if (callee_warning && config->end_sound) - bridge_playfile(c1, c0, config->end_sound, 0); - *fo = NULL; - if (who) - *rc = who; - res = 0; - break; - } - - if (!to) { - if (time_left_ms >= 5000 && config->warning_sound && config->play_warning) { - int t = (time_left_ms + 500) / 1000; /* round to nearest second */ - if (caller_warning) - bridge_playfile(c0, c1, config->warning_sound, t); - if (callee_warning) - bridge_playfile(c1, c0, config->warning_sound, t); - } - if (config->warning_freq) { - nexteventts = ast_tvadd(nexteventts, ast_samp2tv(config->warning_freq, 1000)); - } else - nexteventts = ast_tvadd(config->start_time, ast_samp2tv(config->timelimit, 1000)); - } - } - - if (c0->_softhangup == AST_SOFTHANGUP_UNBRIDGE || c1->_softhangup == AST_SOFTHANGUP_UNBRIDGE) { - if (c0->_softhangup == AST_SOFTHANGUP_UNBRIDGE) - c0->_softhangup = 0; - if (c1->_softhangup == AST_SOFTHANGUP_UNBRIDGE) - c1->_softhangup = 0; - c0->_bridge = c1; - c1->_bridge = c0; - ast_log(LOG_DEBUG, "Unbridge signal received. Ending native bridge.\n"); - continue; - } - - /* Stop if we're a zombie or need a soft hangup */ - if (ast_test_flag(c0, AST_FLAG_ZOMBIE) || ast_check_hangup_locked(c0) || - ast_test_flag(c1, AST_FLAG_ZOMBIE) || ast_check_hangup_locked(c1)) { - *fo = NULL; - if (who) - *rc = who; - res = 0; - ast_log(LOG_DEBUG, "Bridge stops because we're zombie or need a soft hangup: c0=%s, c1=%s, flags: %s,%s,%s,%s\n", - c0->name, c1->name, - ast_test_flag(c0, AST_FLAG_ZOMBIE) ? "Yes" : "No", - ast_check_hangup(c0) ? "Yes" : "No", - ast_test_flag(c1, AST_FLAG_ZOMBIE) ? "Yes" : "No", - ast_check_hangup(c1) ? "Yes" : "No"); - break; - } - - if (c0->tech->bridge && - (config->timelimit == 0) && - (c0->tech->bridge == c1->tech->bridge) && - !nativefailed && !c0->monitor && !c1->monitor && - !c0->spies && !c1->spies && !ast_test_flag(&(config->features_callee),AST_FEATURE_REDIRECT) && - !ast_test_flag(&(config->features_caller),AST_FEATURE_REDIRECT) ) { - /* Looks like they share a bridge method and nothing else is in the way */ - ast_set_flag(c0, AST_FLAG_NBRIDGE); - ast_set_flag(c1, AST_FLAG_NBRIDGE); - if ((res = c0->tech->bridge(c0, c1, config->flags, fo, rc, to)) == AST_BRIDGE_COMPLETE) { - /* \todo XXX here should check that cid_num is not NULL */ - manager_event(EVENT_FLAG_CALL, "Unlink", - "Channel1: %s\r\n" - "Channel2: %s\r\n" - "Uniqueid1: %s\r\n" - "Uniqueid2: %s\r\n" - "CallerID1: %s\r\n" - "CallerID2: %s\r\n", - c0->name, c1->name, c0->uniqueid, c1->uniqueid, c0->cid.cid_num, c1->cid.cid_num); - ast_log(LOG_DEBUG, "Returning from native bridge, channels: %s, %s\n", c0->name, c1->name); - - ast_clear_flag(c0, AST_FLAG_NBRIDGE); - ast_clear_flag(c1, AST_FLAG_NBRIDGE); - - if (c0->_softhangup == AST_SOFTHANGUP_UNBRIDGE || c1->_softhangup == AST_SOFTHANGUP_UNBRIDGE) - continue; - - c0->_bridge = NULL; - c1->_bridge = NULL; - - return res; - } else { - ast_clear_flag(c0, AST_FLAG_NBRIDGE); - ast_clear_flag(c1, AST_FLAG_NBRIDGE); - } - switch (res) { - case AST_BRIDGE_RETRY: - continue; - default: - if (option_verbose > 2) - ast_verbose(VERBOSE_PREFIX_3 "Native bridging %s and %s ended\n", - c0->name, c1->name); - /* fallthrough */ - case AST_BRIDGE_FAILED_NOWARN: - nativefailed++; - break; - } - } - - if (((c0->writeformat != c1->readformat) || (c0->readformat != c1->writeformat) || - (c0->nativeformats != o0nativeformats) || (c1->nativeformats != o1nativeformats)) && - !(c0->generator || c1->generator)) { - if (ast_channel_make_compatible(c0, c1)) { - ast_log(LOG_WARNING, "Can't make %s and %s compatible\n", c0->name, c1->name); - /* \todo XXX here should check that cid_num is not NULL */ - manager_event(EVENT_FLAG_CALL, "Unlink", - "Channel1: %s\r\n" - "Channel2: %s\r\n" - "Uniqueid1: %s\r\n" - "Uniqueid2: %s\r\n" - "CallerID1: %s\r\n" - "CallerID2: %s\r\n", - c0->name, c1->name, c0->uniqueid, c1->uniqueid, c0->cid.cid_num, c1->cid.cid_num); - return AST_BRIDGE_FAILED; - } - o0nativeformats = c0->nativeformats; - o1nativeformats = c1->nativeformats; - } - res = ast_generic_bridge(c0, c1, config, fo, rc, nexteventts); - if (res != AST_BRIDGE_RETRY) - break; - } - - c0->_bridge = NULL; - c1->_bridge = NULL; - - /* \todo XXX here should check that cid_num is not NULL */ - manager_event(EVENT_FLAG_CALL, "Unlink", - "Channel1: %s\r\n" - "Channel2: %s\r\n" - "Uniqueid1: %s\r\n" - "Uniqueid2: %s\r\n" - "CallerID1: %s\r\n" - "CallerID2: %s\r\n", - c0->name, c1->name, c0->uniqueid, c1->uniqueid, c0->cid.cid_num, c1->cid.cid_num); - ast_log(LOG_DEBUG, "Bridge stops bridging channels %s and %s\n", c0->name, c1->name); - - return res; -} - -/*! \brief Sets an option on a channel */ -int ast_channel_setoption(struct ast_channel *chan, int option, void *data, int datalen, int block) -{ - int res; - - if (chan->tech->setoption) { - res = chan->tech->setoption(chan, option, data, datalen); - if (res < 0) - return res; - } else { - errno = ENOSYS; - return -1; - } - if (block) { - /* XXX Implement blocking -- just wait for our option frame reply, discarding - intermediate packets. XXX */ - ast_log(LOG_ERROR, "XXX Blocking not implemented yet XXX\n"); - return -1; - } - return 0; -} - -struct tonepair_def { - int freq1; - int freq2; - int duration; - int vol; -}; - -struct tonepair_state { - int fac1; - int fac2; - int v1_1; - int v2_1; - int v3_1; - int v1_2; - int v2_2; - int v3_2; - int origwfmt; - int pos; - int duration; - int modulate; - struct ast_frame f; - unsigned char offset[AST_FRIENDLY_OFFSET]; - short data[4000]; -}; - -static void tonepair_release(struct ast_channel *chan, void *params) -{ - struct tonepair_state *ts = params; - - if (chan) - ast_set_write_format(chan, ts->origwfmt); - free(ts); -} - -static void *tonepair_alloc(struct ast_channel *chan, void *params) -{ - struct tonepair_state *ts; - struct tonepair_def *td = params; - - if (!(ts = ast_calloc(1, sizeof(*ts)))) - return NULL; - ts->origwfmt = chan->writeformat; - if (ast_set_write_format(chan, AST_FORMAT_SLINEAR)) { - ast_log(LOG_WARNING, "Unable to set '%s' to signed linear format (write)\n", chan->name); - tonepair_release(NULL, ts); - ts = NULL; - } else { - ts->fac1 = 2.0 * cos(2.0 * M_PI * (td->freq1 / 8000.0)) * 32768.0; - ts->v1_1 = 0; - ts->v2_1 = sin(-4.0 * M_PI * (td->freq1 / 8000.0)) * td->vol; - ts->v3_1 = sin(-2.0 * M_PI * (td->freq1 / 8000.0)) * td->vol; - ts->v2_1 = 0; - ts->fac2 = 2.0 * cos(2.0 * M_PI * (td->freq2 / 8000.0)) * 32768.0; - ts->v2_2 = sin(-4.0 * M_PI * (td->freq2 / 8000.0)) * td->vol; - ts->v3_2 = sin(-2.0 * M_PI * (td->freq2 / 8000.0)) * td->vol; - ts->duration = td->duration; - ts->modulate = 0; - } - /* Let interrupts interrupt :) */ - ast_set_flag(chan, AST_FLAG_WRITE_INT); - return ts; -} - -static int tonepair_generator(struct ast_channel *chan, void *data, int len, int samples) -{ - struct tonepair_state *ts = data; - int x; - - /* we need to prepare a frame with 16 * timelen samples as we're - * generating SLIN audio - */ - len = samples * 2; - - if (len > sizeof(ts->data) / 2 - 1) { - ast_log(LOG_WARNING, "Can't generate that much data!\n"); - return -1; - } - memset(&ts->f, 0, sizeof(ts->f)); - for (x=0;x<len/2;x++) { - ts->v1_1 = ts->v2_1; - ts->v2_1 = ts->v3_1; - ts->v3_1 = (ts->fac1 * ts->v2_1 >> 15) - ts->v1_1; - - ts->v1_2 = ts->v2_2; - ts->v2_2 = ts->v3_2; - ts->v3_2 = (ts->fac2 * ts->v2_2 >> 15) - ts->v1_2; - if (ts->modulate) { - int p; - p = ts->v3_2 - 32768; - if (p < 0) p = -p; - p = ((p * 9) / 10) + 1; - ts->data[x] = (ts->v3_1 * p) >> 15; - } else - ts->data[x] = ts->v3_1 + ts->v3_2; - } - ts->f.frametype = AST_FRAME_VOICE; - ts->f.subclass = AST_FORMAT_SLINEAR; - ts->f.datalen = len; - ts->f.samples = samples; - ts->f.offset = AST_FRIENDLY_OFFSET; - ts->f.data = ts->data; - ast_write(chan, &ts->f); - ts->pos += x; - if (ts->duration > 0) { - if (ts->pos >= ts->duration * 8) - return -1; - } - return 0; -} - -static struct ast_generator tonepair = { - alloc: tonepair_alloc, - release: tonepair_release, - generate: tonepair_generator, -}; - -int ast_tonepair_start(struct ast_channel *chan, int freq1, int freq2, int duration, int vol) -{ - struct tonepair_def d = { 0, }; - - d.freq1 = freq1; - d.freq2 = freq2; - d.duration = duration; - d.vol = (vol < 1) ? 8192 : vol; /* force invalid to 8192 */ - if (ast_activate_generator(chan, &tonepair, &d)) - return -1; - return 0; -} - -void ast_tonepair_stop(struct ast_channel *chan) -{ - ast_deactivate_generator(chan); -} - -int ast_tonepair(struct ast_channel *chan, int freq1, int freq2, int duration, int vol) -{ - int res; - - if ((res = ast_tonepair_start(chan, freq1, freq2, duration, vol))) - return res; - - /* Give us some wiggle room */ - while (chan->generatordata && ast_waitfor(chan, 100) >= 0) { - struct ast_frame *f = ast_read(chan); - if (f) - ast_frfree(f); - else - return -1; - } - return 0; -} - -ast_group_t ast_get_group(char *s) -{ - char *piece; - char *c; - int start=0, finish=0, x; - ast_group_t group = 0; - - c = ast_strdupa(s); - - while ((piece = strsep(&c, ","))) { - if (sscanf(piece, "%d-%d", &start, &finish) == 2) { - /* Range */ - } else if (sscanf(piece, "%d", &start)) { - /* Just one */ - finish = start; - } else { - ast_log(LOG_ERROR, "Syntax error parsing group configuration '%s' at '%s'. Ignoring.\n", s, piece); - continue; - } - for (x = start; x <= finish; x++) { - if ((x > 63) || (x < 0)) { - ast_log(LOG_WARNING, "Ignoring invalid group %d (maximum group is 63)\n", x); - } else - group |= ((ast_group_t) 1 << x); - } - } - return group; -} - -static int (*ast_moh_start_ptr)(struct ast_channel *, const char *, const char *) = NULL; -static void (*ast_moh_stop_ptr)(struct ast_channel *) = NULL; -static void (*ast_moh_cleanup_ptr)(struct ast_channel *) = NULL; - -void ast_install_music_functions(int (*start_ptr)(struct ast_channel *, const char *, const char *), - void (*stop_ptr)(struct ast_channel *), - void (*cleanup_ptr)(struct ast_channel *)) -{ - ast_moh_start_ptr = start_ptr; - ast_moh_stop_ptr = stop_ptr; - ast_moh_cleanup_ptr = cleanup_ptr; -} - -void ast_uninstall_music_functions(void) -{ - ast_moh_start_ptr = NULL; - ast_moh_stop_ptr = NULL; - ast_moh_cleanup_ptr = NULL; -} - -/*! \brief Turn on music on hold on a given channel */ -int ast_moh_start(struct ast_channel *chan, const char *mclass, const char *interpclass) -{ - if (ast_moh_start_ptr) - return ast_moh_start_ptr(chan, mclass, interpclass); - - if (option_verbose > 2) { - ast_verbose(VERBOSE_PREFIX_3 "Music class %s requested but no musiconhold loaded.\n", - mclass ? mclass : (interpclass ? interpclass : "default")); - } - - return 0; -} - -/*! \brief Turn off music on hold on a given channel */ -void ast_moh_stop(struct ast_channel *chan) -{ - if (ast_moh_stop_ptr) - ast_moh_stop_ptr(chan); -} - -void ast_moh_cleanup(struct ast_channel *chan) -{ - if (ast_moh_cleanup_ptr) - ast_moh_cleanup_ptr(chan); -} - -void ast_channels_init(void) -{ - ast_cli_register(&cli_show_channeltypes); - ast_cli_register(&cli_show_channeltype); -} - -/*! \brief Print call group and pickup group ---*/ -char *ast_print_group(char *buf, int buflen, ast_group_t group) -{ - unsigned int i; - int first=1; - char num[3]; - - buf[0] = '\0'; - - if (!group) /* Return empty string if no group */ - return buf; - - for (i = 0; i <= 63; i++) { /* Max group is 63 */ - if (group & ((ast_group_t) 1 << i)) { - if (!first) { - strncat(buf, ", ", buflen); - } else { - first=0; - } - snprintf(num, sizeof(num), "%u", i); - strncat(buf, num, buflen); - } - } - return buf; -} - -void ast_set_variables(struct ast_channel *chan, struct ast_variable *vars) -{ - struct ast_variable *cur; - - for (cur = vars; cur; cur = cur->next) - pbx_builtin_setvar_helper(chan, cur->name, cur->value); -} - -static void copy_data_from_queue(struct ast_channel_spy_queue *queue, short *buf, unsigned int samples) -{ - struct ast_frame *f; - int tocopy; - int bytestocopy; - - while (samples) { - f = queue->head; - - if (!f) { - ast_log(LOG_ERROR, "Ran out of frames before buffer filled!\n"); - break; - } - - tocopy = (f->samples > samples) ? samples : f->samples; - bytestocopy = ast_codec_get_len(queue->format, tocopy); - memcpy(buf, f->data, bytestocopy); - samples -= tocopy; - buf += tocopy; - f->samples -= tocopy; - f->data += bytestocopy; - f->datalen -= bytestocopy; - f->offset += bytestocopy; - queue->samples -= tocopy; - if (!f->samples) { - queue->head = f->next; - ast_frfree(f); - } - } -} - -struct ast_frame *ast_channel_spy_read_frame(struct ast_channel_spy *spy, unsigned int samples) -{ - struct ast_frame *result; - /* buffers are allocated to hold SLINEAR, which is the largest format */ - short read_buf[samples]; - short write_buf[samples]; - struct ast_frame *read_frame; - struct ast_frame *write_frame; - int need_dup; - struct ast_frame stack_read_frame = { .frametype = AST_FRAME_VOICE, - .subclass = spy->read_queue.format, - .data = read_buf, - .samples = samples, - .datalen = ast_codec_get_len(spy->read_queue.format, samples), - }; - struct ast_frame stack_write_frame = { .frametype = AST_FRAME_VOICE, - .subclass = spy->write_queue.format, - .data = write_buf, - .samples = samples, - .datalen = ast_codec_get_len(spy->write_queue.format, samples), - }; - - /* if a flush has been requested, dump everything in whichever queue is larger */ - if (ast_test_flag(spy, CHANSPY_TRIGGER_FLUSH)) { - if (spy->read_queue.samples > spy->write_queue.samples) { - if (ast_test_flag(spy, CHANSPY_READ_VOLADJUST)) { - for (result = spy->read_queue.head; result; result = result->next) - ast_frame_adjust_volume(result, spy->read_vol_adjustment); - } - result = spy->read_queue.head; - spy->read_queue.head = NULL; - spy->read_queue.samples = 0; - } else { - if (ast_test_flag(spy, CHANSPY_WRITE_VOLADJUST)) { - for (result = spy->write_queue.head; result; result = result->next) - ast_frame_adjust_volume(result, spy->write_vol_adjustment); - } - result = spy->write_queue.head; - spy->write_queue.head = NULL; - spy->write_queue.samples = 0; - } - ast_clear_flag(spy, CHANSPY_TRIGGER_FLUSH); - return result; - } - - if ((spy->read_queue.samples < samples) || (spy->write_queue.samples < samples)) - return NULL; - - /* short-circuit if both head frames have exactly what we want */ - if ((spy->read_queue.head->samples == samples) && - (spy->write_queue.head->samples == samples)) { - read_frame = spy->read_queue.head; - spy->read_queue.head = read_frame->next; - read_frame->next = NULL; - - write_frame = spy->write_queue.head; - spy->write_queue.head = write_frame->next; - write_frame->next = NULL; - - spy->read_queue.samples -= samples; - spy->write_queue.samples -= samples; - - need_dup = 0; - } else { - copy_data_from_queue(&spy->read_queue, read_buf, samples); - copy_data_from_queue(&spy->write_queue, write_buf, samples); - - read_frame = &stack_read_frame; - write_frame = &stack_write_frame; - need_dup = 1; - } - - if (ast_test_flag(spy, CHANSPY_READ_VOLADJUST)) - ast_frame_adjust_volume(read_frame, spy->read_vol_adjustment); - - if (ast_test_flag(spy, CHANSPY_WRITE_VOLADJUST)) - ast_frame_adjust_volume(write_frame, spy->write_vol_adjustment); - - if (ast_test_flag(spy, CHANSPY_MIXAUDIO)) { - ast_frame_slinear_sum(read_frame, write_frame); - - if (need_dup) - result = ast_frdup(read_frame); - else { - result = read_frame; - ast_frfree(write_frame); - } - } else { - if (need_dup) { - result = ast_frdup(read_frame); - result->next = ast_frdup(write_frame); - } else { - result = read_frame; - result->next = write_frame; - } - } - - return result; -} - -static void *silence_generator_alloc(struct ast_channel *chan, void *data) -{ - /* just store the data pointer in the channel structure */ - return data; -} - -static void silence_generator_release(struct ast_channel *chan, void *data) -{ - /* nothing to do */ -} - -static int silence_generator_generate(struct ast_channel *chan, void *data, int len, int samples) -{ - short buf[samples]; - struct ast_frame frame = { - .frametype = AST_FRAME_VOICE, - .subclass = AST_FORMAT_SLINEAR, - .data = buf, - .samples = samples, - .datalen = sizeof(buf), - }; - memset(buf, 0, sizeof(buf)); - if (ast_write(chan, &frame)) - return -1; - return 0; -} - -static struct ast_generator silence_generator = { - .alloc = silence_generator_alloc, - .release = silence_generator_release, - .generate = silence_generator_generate, -}; - -struct ast_silence_generator { - int old_write_format; -}; - -struct ast_silence_generator *ast_channel_start_silence_generator(struct ast_channel *chan) -{ - struct ast_silence_generator *state; - - if (!(state = ast_calloc(1, sizeof(*state)))) { - return NULL; - } - - state->old_write_format = chan->writeformat; - - if (ast_set_write_format(chan, AST_FORMAT_SLINEAR) < 0) { - ast_log(LOG_ERROR, "Could not set write format to SLINEAR\n"); - free(state); - return NULL; - } - - ast_activate_generator(chan, &silence_generator, state); - - if (option_debug) - ast_log(LOG_DEBUG, "Started silence generator on '%s'\n", chan->name); - - return state; -} - -void ast_channel_stop_silence_generator(struct ast_channel *chan, struct ast_silence_generator *state) -{ - if (!state) - return; - - ast_deactivate_generator(chan); - - if (option_debug) - ast_log(LOG_DEBUG, "Stopped silence generator on '%s'\n", chan->name); - - if (ast_set_write_format(chan, state->old_write_format) < 0) - ast_log(LOG_ERROR, "Could not return write format to its original state\n"); - - free(state); -} - - -/*! \ brief Convert channel reloadreason (ENUM) to text string for manager event */ -const char *channelreloadreason2txt(enum channelreloadreason reason) -{ - switch (reason) { - case CHANNEL_MODULE_LOAD: - return "LOAD (Channel module load)"; - - case CHANNEL_MODULE_RELOAD: - return "RELOAD (Channel module reload)"; - - case CHANNEL_CLI_RELOAD: - return "CLIRELOAD (Channel module reload by CLI command)"; - - default: - return "MANAGERRELOAD (Channel module reload by manager)"; - } -}; - -#ifdef DEBUG_CHANNEL_LOCKS - -/*! \brief Unlock AST channel (and print debugging output) -\note You need to enable DEBUG_CHANNEL_LOCKS for this function -*/ -int ast_channel_unlock(struct ast_channel *chan) -{ - int res = 0; - if (option_debug > 2) - ast_log(LOG_DEBUG, "::::==== Unlocking AST channel %s\n", chan->name); - - if (!chan) { - ast_log(LOG_DEBUG, "::::==== Unlocking non-existing channel \n"); - return 0; - } - - res = ast_mutex_unlock(&chan->lock); - - if (option_debug > 2) { - /* Try to find counter if possible on your platform - I've only found out how to do this on Linux - DEBUG_THREADS changes the lock structure - */ -#ifdef __linux__ - int count = 0; -#ifdef DEBUG_THREADS - if ((count = chan->lock.mutex.__m_count)) -#else - if ((count = chan->lock.__m_count)) -#endif - ast_log(LOG_DEBUG, ":::=== Still have %d locks (recursive)\n", count); -#endif - if (!res) - ast_log(LOG_DEBUG, "::::==== Channel %s was unlocked\n", chan->name); - if (res == EINVAL) { - ast_log(LOG_DEBUG, "::::==== Channel %s had no lock by this thread. Failed unlocking\n", chan->name); - } - } - if (res == EPERM) { - /* We had no lock, so okay any way*/ - if (option_debug > 3) - ast_log(LOG_DEBUG, "::::==== Channel %s was not locked at all \n", chan->name); - res = 0; - } - return res; -} - -/*! \brief Lock AST channel (and print debugging output) -\note You need to enable DEBUG_CHANNEL_LOCKS for this function */ -int ast_channel_lock(struct ast_channel *chan) -{ - int res; - - if (option_debug > 3) - ast_log(LOG_DEBUG, "====:::: Locking AST channel %s\n", chan->name); - - res = ast_mutex_lock(&chan->lock); - - if (option_debug > 3) { -#ifdef __linux__ - int count = 0; -#ifdef DEBUG_THREADS - if ((count = chan->lock.mutex.__m_count)) -#else - if ((count = chan->lock.__m_count)) -#endif - ast_log(LOG_DEBUG, ":::=== Now have %d locks (recursive)\n", count); -#endif - if (!res) - ast_log(LOG_DEBUG, "::::==== Channel %s was locked\n", chan->name); - if (res == EDEADLK) { - /* We had no lock, so okey any way */ - if (option_debug > 3) - ast_log(LOG_DEBUG, "::::==== Channel %s was not locked by us. Lock would cause deadlock.\n", chan->name); - } - if (res == EINVAL) { - if (option_debug > 3) - ast_log(LOG_DEBUG, "::::==== Channel %s lock failed. No mutex.\n", chan->name); - } - } - return res; -} - -/*! \brief Lock AST channel (and print debugging output) -\note You need to enable DEBUG_CHANNEL_LOCKS for this function */ -int ast_channel_trylock(struct ast_channel *chan) -{ - int res; - - if (option_debug > 2) - ast_log(LOG_DEBUG, "====:::: Trying to lock AST channel %s\n", chan->name); - - res = ast_mutex_trylock(&chan->lock); - - if (option_debug > 2) { -#ifdef __linux__ - int count = 0; -#ifdef DEBUG_THREADS - if ((count = chan->lock.mutex.__m_count)) -#else - if ((count = chan->lock.__m_count)) -#endif - ast_log(LOG_DEBUG, ":::=== Now have %d locks (recursive)\n", count); -#endif - if (!res) - ast_log(LOG_DEBUG, "::::==== Channel %s was locked\n", chan->name); - if (res == EBUSY) { - /* We failed to lock */ - if (option_debug > 2) - ast_log(LOG_DEBUG, "::::==== Channel %s failed to lock. Not waiting around...\n", chan->name); - } - if (res == EDEADLK) { - /* We had no lock, so okey any way*/ - if (option_debug > 2) - ast_log(LOG_DEBUG, "::::==== Channel %s was not locked. Lock would cause deadlock.\n", chan->name); - } - if (res == EINVAL && option_debug > 2) - ast_log(LOG_DEBUG, "::::==== Channel %s lock failed. No mutex.\n", chan->name); - } - return res; -} - -#endif - -/* - * Wrappers for various ast_say_*() functions that call the full version - * of the same functions. - * The proper place would be say.c, but that file is optional and one - * must be able to build asterisk even without it (using a loadable 'say' - * implementation that only supplies the 'full' version of the functions. - */ - -int ast_say_number(struct ast_channel *chan, int num, - const char *ints, const char *language, const char *options) -{ - return ast_say_number_full(chan, num, ints, language, options, -1, -1); -} - -int ast_say_enumeration(struct ast_channel *chan, int num, - const char *ints, const char *language, const char *options) -{ - return ast_say_enumeration_full(chan, num, ints, language, options, -1, -1); -} - -int ast_say_digits(struct ast_channel *chan, int num, - const char *ints, const char *lang) -{ - return ast_say_digits_full(chan, num, ints, lang, -1, -1); -} - -int ast_say_digit_str(struct ast_channel *chan, const char *str, - const char *ints, const char *lang) -{ - return ast_say_digit_str_full(chan, str, ints, lang, -1, -1); -} - -int ast_say_character_str(struct ast_channel *chan, const char *str, - const char *ints, const char *lang) -{ - return ast_say_character_str_full(chan, str, ints, lang, -1, -1); -} - -int ast_say_phonetic_str(struct ast_channel *chan, const char *str, - const char *ints, const char *lang) -{ - return ast_say_phonetic_str_full(chan, str, ints, lang, -1, -1); -} - -int ast_say_digits_full(struct ast_channel *chan, int num, - const char *ints, const char *lang, int audiofd, int ctrlfd) -{ - char buf[256]; - - snprintf(buf, sizeof(buf), "%d", num); - return ast_say_digit_str_full(chan, buf, ints, lang, audiofd, ctrlfd); -} - -int ast_channel_whisper_start(struct ast_channel *chan) -{ - if (chan->whisper) - return -1; - - if (!(chan->whisper = ast_calloc(1, sizeof(*chan->whisper)))) - return -1; - - ast_mutex_init(&chan->whisper->lock); - ast_slinfactory_init(&chan->whisper->sf); - chan->whisper->original_format = ast_set_write_format(chan, AST_FORMAT_SLINEAR); - ast_set_flag(chan, AST_FLAG_WHISPER); - - return 0; -} - -int ast_channel_whisper_feed(struct ast_channel *chan, struct ast_frame *f) -{ - if (!chan->whisper) - return -1; - - ast_mutex_lock(&chan->whisper->lock); - ast_slinfactory_feed(&chan->whisper->sf, f); - ast_mutex_unlock(&chan->whisper->lock); - - return 0; -} - -void ast_channel_whisper_stop(struct ast_channel *chan) -{ - if (!chan->whisper) - return; - - ast_clear_flag(chan, AST_FLAG_WHISPER); - ast_set_write_format(chan, chan->whisper->original_format); - ast_slinfactory_destroy(&chan->whisper->sf); - ast_mutex_destroy(&chan->whisper->lock); - free(chan->whisper); - chan->whisper = NULL; -} |