mirror of https://github.com/asterisk/asterisk
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@398 65c4cc65-6c06-0410-ace0-fbb531ad65f31.0
Mark Spencer
24 years ago
parent
c27ef7f85c
commit
f2784d97fd
@ -0,0 +1,498 @@
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/*
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* Asterisk -- A telephony toolkit for Linux.
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*
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* Routines implementing call parking
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*
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* Copyright (C) 1999, Mark Spencer
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*
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* Mark Spencer <markster@linux-support.net>
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License
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*/
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#include <asterisk/file.h>
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#include <asterisk/logger.h>
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#include <asterisk/channel.h>
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#include <asterisk/pbx.h>
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#include <asterisk/options.h>
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#include <asterisk/module.h>
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#include <asterisk/translate.h>
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#include <asterisk/say.h>
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#include <asterisk/channel_pvt.h>
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#include <asterisk/parking.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <sys/time.h>
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#include <sys/signal.h>
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#include <netinet/in.h>
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#include <pthread.h>
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static char *parkedcall = "ParkedCall";
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/* No more than 45 seconds parked before you do something with them */
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static int parkingtime = 45000;
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/* Context for which parking is made accessible */
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static char parking_con[AST_MAX_EXTENSION] = "parkedcalls";
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/* Extension you type to park the call */
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static char parking_ext[AST_MAX_EXTENSION] = "700";
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/* First available extension for parking */
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static int parking_start = 701;
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/* Last available extension for parking */
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static int parking_stop = 750;
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/* Registrar for operations */
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static char *registrar = "res_parking";
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static char *synopsis = "Answer a parked call";
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static char *descrip = "ParkedCall(exten):"
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"Used to connect to a parked call. This Application is always\n"
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"registered internally and does not need to be explicitly added\n"
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"into the dialplan, although you should include the 'parkedcalls'\n"
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"context.\n";
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struct parkeduser {
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struct ast_channel *chan;
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struct timeval start;
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int parkingnum;
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/* Where to go if our parking time expires */
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char context[AST_MAX_EXTENSION];
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char exten[AST_MAX_EXTENSION];
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int priority;
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struct parkeduser *next;
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};
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static struct parkeduser *parkinglot;
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static pthread_mutex_t parking_lock = PTHREAD_MUTEX_INITIALIZER;
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static pthread_t parking_thread;
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STANDARD_LOCAL_USER;
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LOCAL_USER_DECL;
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char *ast_parking_ext(void)
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{
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return parking_ext;
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}
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int ast_park_call(struct ast_channel *chan, struct ast_channel *peer)
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{
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/* We put the user in the parking list, then wake up the parking thread to be sure it looks
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after these channels too */
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struct parkeduser *pu, *cur;
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int x;
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pu = malloc(sizeof(struct parkeduser));
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if (pu) {
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ast_pthread_mutex_lock(&parking_lock);
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for (x=parking_start;x<=parking_stop;x++) {
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cur = parkinglot;
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while(cur) {
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if (cur->parkingnum == x)
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break;
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cur = cur->next;
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}
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if (!cur)
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break;
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}
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if (x <= parking_stop) {
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pu->chan = chan;
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gettimeofday(&pu->start, NULL);
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pu->parkingnum = x;
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/* Remember what had been dialed, so that if the parking
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expires, we try to come back to the same place */
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strncpy(pu->context, chan->context, sizeof(pu->context)-1);
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strncpy(pu->exten, chan->exten, sizeof(pu->exten)-1);
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pu->priority = chan->priority;
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pu->next = parkinglot;
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parkinglot = pu;
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ast_pthread_mutex_unlock(&parking_lock);
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/* Wake up the (presumably select()ing) thread */
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pthread_kill(parking_thread, SIGURG);
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if (option_verbose > 1)
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ast_verbose(VERBOSE_PREFIX_2 "Parked %s on %d\n", pu->chan->name, pu->parkingnum);
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ast_say_digits(peer, pu->parkingnum, "", peer->language);
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return 0;
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} else {
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ast_log(LOG_WARNING, "No more parking spaces\n");
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free(pu);
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ast_pthread_mutex_unlock(&parking_lock);
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return -1;
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}
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} else {
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ast_log(LOG_WARNING, "Out of memory\n");
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return -1;
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}
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return 0;
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}
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int ast_masq_park_call(struct ast_channel *rchan, struct ast_channel *peer)
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{
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struct ast_channel *chan;
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struct ast_frame *f;
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/* Make a new, fake channel that we'll use to masquerade in the real one */
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chan = ast_channel_alloc();
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if (chan) {
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/* Let us keep track of the channel name */
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snprintf(chan->name, sizeof (chan->name), "Parked/%s",rchan->name);
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/* Make formats okay */
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chan->readformat = rchan->readformat;
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chan->writeformat = rchan->writeformat;
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ast_channel_masquerade(chan, rchan);
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/* Setup the extensions and such */
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strncpy(chan->context, rchan->context, sizeof(chan->context) - 1);
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strncpy(chan->exten, rchan->exten, sizeof(chan->exten) - 1);
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chan->priority = rchan->priority;
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/* Make the masq execute */
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f = ast_read(chan);
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if (f)
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ast_frfree(f);
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ast_park_call(chan, peer);
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} else {
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ast_log(LOG_WARNING, "Unable to create parked channel\n");
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return -1;
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}
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return 0;
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}
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int ast_bridge_call(struct ast_channel *chan, struct ast_channel *peer, int allowredirect)
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{
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/* Copy voice back and forth between the two channels. Give the peer
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the ability to transfer calls with '#<extension' syntax. */
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int len;
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struct ast_frame *f;
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struct ast_channel *who;
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char newext[256], *ptr;
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int res;
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struct ast_option_header *aoh;
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/* Answer if need be */
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if (chan->state != AST_STATE_UP) {
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if (ast_answer(chan))
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return -1;
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}
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peer->appl = "Bridged Call";
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peer->data = chan->name;
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for (;;) {
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res = ast_channel_bridge(chan, peer, allowredirect ? AST_BRIDGE_DTMF_CHANNEL_1 : 0, &f, &who);
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if (res < 0) {
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ast_log(LOG_WARNING, "Bridge failed on channels %s and %s\n", chan->name, peer->name);
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return -1;
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}
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if (!f || ((f->frametype == AST_FRAME_CONTROL) && ((f->subclass == AST_CONTROL_HANGUP) || (f->subclass == AST_CONTROL_BUSY) ||
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(f->subclass == AST_CONTROL_CONGESTION)))) {
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res = -1;
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break;
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}
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if ((f->frametype == AST_FRAME_CONTROL) && (f->subclass == AST_CONTROL_RINGING)) {
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if (who == chan)
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ast_indicate(peer, AST_CONTROL_RINGING);
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else
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ast_indicate(chan, AST_CONTROL_RINGING);
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}
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if ((f->frametype == AST_FRAME_CONTROL) && (f->subclass == AST_CONTROL_OPTION)) {
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aoh = f->data;
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/* Forward option Requests */
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if (aoh && (aoh->flag == AST_OPTION_FLAG_REQUEST)) {
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if (who == chan)
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ast_channel_setoption(peer, ntohs(aoh->option), aoh->data, f->datalen - sizeof(struct ast_option_header), 0);
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else
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ast_channel_setoption(chan, ntohs(aoh->option), aoh->data, f->datalen - sizeof(struct ast_option_header), 0);
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}
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}
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if ((f->frametype == AST_FRAME_DTMF) && (who == peer) && allowredirect &&
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(f->subclass == '#')) {
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memset(newext, 0, sizeof(newext));
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ptr = newext;
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/* Transfer */
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if ((res=ast_streamfile(peer, "pbx-transfer", chan->language)))
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break;
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if ((res=ast_waitstream(peer, AST_DIGIT_ANY)) < 0)
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break;
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ast_stopstream(peer);
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if (res > 0) {
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/* If they've typed a digit already, handle it */
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newext[0] = res;
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ptr++;
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len --;
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}
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res = 0;
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while(strlen(newext) < sizeof(newext - 1)) {
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res = ast_waitfordigit(peer, 3000);
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if (res < 1)
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break;
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*(ptr++) = res;
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if (!ast_canmatch_extension(peer, peer->context, newext, 1, peer->callerid) ||
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ast_exists_extension(peer, peer->context, newext, 1, peer->callerid)) {
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res = 0;
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break;
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}
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}
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if (res)
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break;
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if (!strcmp(newext, ast_parking_ext())) {
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if (!ast_park_call(chan, peer)) {
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/* We return non-zero, but tell the PBX not to hang the channel when
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the thread dies -- We have to be careful now though. We are responsible for
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hanging up the channel, else it will never be hung up! */
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res=AST_PBX_KEEPALIVE;
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break;
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} else {
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ast_log(LOG_WARNING, "Unable to park call %s\n", chan->name);
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}
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/* XXX Maybe we should have another message here instead of invalid extension XXX */
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} else if (ast_exists_extension(chan, peer->context, newext, 1, peer->callerid)) {
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/* Set the channel's new extension, since it exists, using peer context */
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strncpy(chan->exten, newext, sizeof(chan->exten)-1);
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strncpy(chan->context, peer->context, sizeof(chan->context)-1);
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chan->priority = 0;
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ast_frfree(f);
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if (option_verbose > 2)
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ast_verbose(VERBOSE_PREFIX_3 "Transferring %s to '%s' (context %s) priority 1\n", chan->name, chan->exten, chan->context);
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res=0;
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break;
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} else {
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if (option_verbose > 2)
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ast_verbose(VERBOSE_PREFIX_3 "Unable to find extension '%s' in context %s\n", newext, peer->context);
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}
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res = ast_streamfile(peer, "pbx-invalid", chan->language);
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if (res)
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break;
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res = ast_waitstream(peer, AST_DIGIT_ANY);
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ast_stopstream(peer);
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res = 0;
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} else {
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if (f && (f->frametype == AST_FRAME_DTMF)) {
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if (who == peer)
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ast_write(chan, f);
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else
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ast_write(peer, f);
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}
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#if 1
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ast_log(LOG_DEBUG, "Read from %s (%d,%d)\n", who->name, f->frametype, f->subclass);
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#endif
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}
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if (f)
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ast_frfree(f);
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}
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return res;
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}
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static void *do_parking_thread(void *ignore)
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{
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int ms, tms, max;
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struct parkeduser *pu, *pl, *pt = NULL;
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struct timeval tv;
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struct ast_frame *f;
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int x;
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fd_set rfds, efds;
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fd_set nrfds, nefds;
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FD_ZERO(&rfds);
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FD_ZERO(&efds);
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for (;;) {
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ms = -1;
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max = -1;
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ast_pthread_mutex_lock(&parking_lock);
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pl = NULL;
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pu = parkinglot;
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gettimeofday(&tv, NULL);
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FD_ZERO(&nrfds);
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FD_ZERO(&nefds);
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while(pu) {
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tms = (tv.tv_sec - pu->start.tv_sec) * 1000 + (tv.tv_usec - pu->start.tv_usec) / 1000;
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if (tms > parkingtime) {
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/* They've been waiting too long, send them back to where they came. Theoretically they
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should have their original extensions and such, but we copy to be on the safe side */
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strncpy(pu->chan->exten, pu->exten, sizeof(pu->chan->exten)-1);
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strncpy(pu->chan->context, pu->context, sizeof(pu->chan->context)-1);
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pu->chan->priority = pu->priority;
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/* Start up the PBX, or hang them up */
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if (ast_pbx_start(pu->chan)) {
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ast_log(LOG_WARNING, "Unable to restart the PBX for user on '%s', hanging them up...\n", pu->chan->name);
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ast_hangup(pu->chan);
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}
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/* And take them out of the parking lot */
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if (pl)
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pl->next = pu->next;
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else
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parkinglot = pu->next;
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pt = pu;
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pu = pu->next;
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free(pt);
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} else {
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for (x=0;x<AST_MAX_FDS;x++) {
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if ((pu->chan->fds[x] > -1) && (FD_ISSET(pu->chan->fds[x], &rfds) || FD_ISSET(pu->chan->fds[x], &efds))) {
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if (FD_ISSET(pu->chan->fds[x], &efds))
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pu->chan->exception = 1;
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pu->chan->fdno = x;
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/* See if they need servicing */
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f = ast_read(pu->chan);
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if (!f || ((f->frametype == AST_FRAME_CONTROL) && (f->subclass == AST_CONTROL_HANGUP))) {
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/* There's a problem, hang them up*/
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if (option_verbose > 1)
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ast_verbose(VERBOSE_PREFIX_2 "%s got tired of being parked\n", pu->chan->name);
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ast_hangup(pu->chan);
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/* And take them out of the parking lot */
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if (pl)
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pl->next = pu->next;
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else
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parkinglot = pu->next;
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pt = pu;
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pu = pu->next;
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free(pt);
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break;
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} else {
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/* XXX Maybe we could do something with packets, like dial "0" for operator or something XXX */
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ast_frfree(f);
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goto std; /* XXX Ick: jumping into an else statement??? XXX */
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}
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}
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}
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if (x >= AST_MAX_FDS) {
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std: for (x=0;x<AST_MAX_FDS;x++) {
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/* Keep this one for next one */
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if (pu->chan->fds[x] > -1) {
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FD_SET(pu->chan->fds[x], &nrfds);
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FD_SET(pu->chan->fds[x], &nefds);
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if (pu->chan->fds[x] > max)
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max = pu->chan->fds[x];
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}
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}
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/* Keep track of our longest wait */
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if ((tms < ms) || (ms < 0))
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ms = tms;
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pl = pu;
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pu = pu->next;
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}
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}
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}
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ast_pthread_mutex_unlock(&parking_lock);
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rfds = nrfds;
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efds = nefds;
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tv.tv_sec = ms / 1000;
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tv.tv_usec = (ms % 1000) * 1000;
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/* Wait for something to happen */
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select(max + 1, &rfds, NULL, &efds, (ms > -1) ? &tv : NULL);
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pthread_testcancel();
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}
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return NULL; /* Never reached */
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}
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static int park_exec(struct ast_channel *chan, void *data)
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{
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int res=0;
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struct localuser *u;
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struct ast_channel *peer=NULL;
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struct parkeduser *pu, *pl=NULL;
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int park;
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if (!data) {
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ast_log(LOG_WARNING, "Park requires an argument (extension number)\n");
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return -1;
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}
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LOCAL_USER_ADD(u);
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park = atoi((char *)data);
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ast_pthread_mutex_lock(&parking_lock);
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pu = parkinglot;
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while(pu) {
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if (pu->parkingnum == park) {
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if (pl)
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pl->next = pu->next;
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else
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parkinglot = pu->next;
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break;
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}
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pu = pu->next;
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}
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ast_pthread_mutex_unlock(&parking_lock);
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if (pu) {
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peer = pu->chan;
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free(pu);
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}
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if (peer) {
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res = ast_channel_make_compatible(chan, peer);
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if (res < 0) {
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ast_log(LOG_WARNING, "Could not make channels %s and %s compatible for bridge\n", chan->name, peer->name);
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ast_hangup(peer);
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return -1;
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}
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/* This runs sorta backwards, since we give the incoming channel control, as if it
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were the person called. */
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if (option_verbose > 2)
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ast_verbose(VERBOSE_PREFIX_3 "Channel %s connected to parked call %d\n", chan->name, park);
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res = ast_bridge_call(peer, chan, 1);
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/* Simulate the PBX hanging up */
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if (res != AST_PBX_KEEPALIVE)
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ast_hangup(peer);
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return -1;
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} else {
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/* XXX Play a message XXX */
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if (option_verbose > 2)
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ast_verbose(VERBOSE_PREFIX_3 "Channel %s tried to talk to non-existant parked call %d\n", chan->name, park);
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res = -1;
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}
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LOCAL_USER_REMOVE(u);
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return res;
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}
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int load_module(void)
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{
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int res;
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int x;
|
||||
struct ast_context *con;
|
||||
char exten[AST_MAX_EXTENSION];
|
||||
con = ast_context_find(parking_con);
|
||||
if (!con) {
|
||||
con = ast_context_create(parking_con, registrar);
|
||||
if (!con) {
|
||||
ast_log(LOG_ERROR, "Parking context '%s' does not exist and unable to create\n", parking_con);
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
for(x=parking_start; x<=parking_stop;x++) {
|
||||
snprintf(exten, sizeof(exten), "%d", x);
|
||||
ast_add_extension2(con, 1, exten, 1, NULL, parkedcall, strdup(exten), free, registrar);
|
||||
}
|
||||
pthread_create(&parking_thread, NULL, do_parking_thread, NULL);
|
||||
res = ast_register_application(parkedcall, park_exec, synopsis, descrip);
|
||||
return res;
|
||||
}
|
||||
|
||||
int unload_module(void)
|
||||
{
|
||||
STANDARD_HANGUP_LOCALUSERS;
|
||||
return ast_unregister_application(parkedcall);
|
||||
}
|
||||
|
||||
char *description(void)
|
||||
{
|
||||
return "Call Parking Resource";
|
||||
}
|
||||
|
||||
int usecount(void)
|
||||
{
|
||||
/* Never allow parking to be unloaded because it will
|
||||
unresolve needed symbols in the dialer */
|
||||
#if 0
|
||||
int res;
|
||||
STANDARD_USECOUNT(res);
|
||||
return res;
|
||||
#else
|
||||
return 1;
|
||||
#endif
|
||||
}
|
||||
|
||||
char *key()
|
||||
{
|
||||
return ASTERISK_GPL_KEY;
|
||||
}
|
||||
Loading…
Reference in new issue