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508 lines
14 KiB
508 lines
14 KiB
/*
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* Asterisk -- A telephony toolkit for Linux.
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*
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* Trivial application to dial a channel
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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/lock.h>
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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/parking.h>
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#include <asterisk/musiconhold.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 *tdesc = "Dialing Application";
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static char *app = "Dial";
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static char *synopsis = "Place an call and connect to the current channel";
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static char *descrip =
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" Dial(Technology/resource[&Technology2/resource2...][|timeout][|options]):\n"
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"Requests one or more channels and places specified outgoing calls on them.\n"
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"As soon as a channel answers, the Dial app will answer the originating\n"
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"channel (if it needs to be answered) and will bridge a call with the channel\n"
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"which first answered. All other calls placed by the Dial app will be hunp up\n"
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"If a timeout is not specified, the Dial application will wait indefinitely\n"
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"until either one of the called channels answers, the user hangs up, or all\n"
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"channels return busy or error. In general, the dialler will return 0 if it\n"
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"was unable to place the call, or the timeout expired. However, if all\n"
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"channels were busy, and there exists an extension with priority n+101 (where\n"
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"n is the priority of the dialler instance), then it will be the next\n"
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"executed extension (this allows you to setup different behavior on busy from\n"
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"no-answer).\n"
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" This application returns -1 if the originating channel hangs up, or if the\n"
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"call is bridged and either of the parties in the bridge terminate the call.\n"
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"The option string may contain zero or more of the following characters:\n"
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" 't' -- allow the called user transfer the calling user\n"
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" 'T' -- to allow the calling user to transfer the call.\n"
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" 'r' -- indicate ringing to the calling party, pass no audio until answered.\n"
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" 'm' -- provide hold music to the calling party until answered.\n"
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" 'd' -- data-quality (modem) call (minimum delay).\n"
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" 'H' -- allow caller to hang up by hitting *.\n"
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" In addition to transferring the call, a call may be parked and then picked\n"
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"up by another user.\n";
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/* We define a customer "local user" structure because we
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use it not only for keeping track of what is in use but
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also for keeping track of who we're dialing. */
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struct localuser {
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struct ast_channel *chan;
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int stillgoing;
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int allowredirect;
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int ringbackonly;
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int musiconhold;
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int dataquality;
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int allowdisconnect;
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struct localuser *next;
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};
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LOCAL_USER_DECL;
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static void hanguptree(struct localuser *outgoing, struct ast_channel *exception)
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{
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/* Hang up a tree of stuff */
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struct localuser *oo;
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while(outgoing) {
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/* Hangup any existing lines we have open */
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if (outgoing->chan != exception)
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ast_hangup(outgoing->chan);
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oo = outgoing;
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outgoing=outgoing->next;
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free(oo);
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}
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}
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#define MAX 256
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static struct ast_channel *wait_for_answer(struct ast_channel *in, struct localuser *outgoing, int *to, int *allowredir, int *allowdisconnect)
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{
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struct localuser *o;
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int found;
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int numlines;
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int sentringing = 0;
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int numbusies = 0;
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int orig = *to;
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struct ast_frame *f;
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struct ast_channel *peer = NULL;
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struct ast_channel *watchers[MAX];
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int pos;
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int single;
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int moh=0;
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int ringind=0;
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struct ast_channel *winner;
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single = (outgoing && !outgoing->next);
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if (single) {
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/* If we are calling a single channel, make them compatible for in-band tone purpose */
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ast_channel_make_compatible(outgoing->chan, in);
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}
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if (outgoing) {
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moh = outgoing->musiconhold;
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ringind = outgoing->ringbackonly;
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if (outgoing->musiconhold) {
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ast_moh_start(in, NULL);
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} else if (outgoing->ringbackonly) {
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ast_indicate(in, AST_CONTROL_RINGING);
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}
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}
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while(*to && !peer) {
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o = outgoing;
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found = -1;
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pos = 1;
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numlines = 0;
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watchers[0] = in;
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while(o) {
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/* Keep track of important channels */
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if (o->stillgoing) {
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watchers[pos++] = o->chan;
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found = 1;
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}
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o = o->next;
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numlines++;
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}
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if (found < 0) {
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if (numlines == numbusies) {
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if (option_verbose > 2)
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ast_verbose( VERBOSE_PREFIX_2 "Everyone is busy at this time\n");
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/* See if there is a special busy message */
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if (ast_exists_extension(in, in->context, in->exten, in->priority + 101, in->callerid))
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in->priority+=100;
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} else {
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if (option_verbose > 2)
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ast_verbose( VERBOSE_PREFIX_2 "No one is available to answer at this time\n");
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}
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*to = 0;
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return NULL;
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}
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winner = ast_waitfor_n(watchers, pos, to);
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o = outgoing;
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while(o) {
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if (o->stillgoing && (o->chan->_state == AST_STATE_UP)) {
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if (!peer) {
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if (option_verbose > 2)
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ast_verbose( VERBOSE_PREFIX_3 "%s answered %s\n", o->chan->name, in->name);
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peer = o->chan;
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*allowredir = o->allowredirect;
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*allowdisconnect = o->allowdisconnect;
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}
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} else if (o->chan == winner) {
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f = ast_read(winner);
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if (f) {
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if (f->frametype == AST_FRAME_CONTROL) {
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switch(f->subclass) {
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case AST_CONTROL_ANSWER:
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/* This is our guy if someone answered. */
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if (!peer) {
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if (option_verbose > 2)
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ast_verbose( VERBOSE_PREFIX_3 "%s answered %s\n", o->chan->name, in->name);
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peer = o->chan;
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*allowredir = o->allowredirect;
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*allowdisconnect = o->allowdisconnect;
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}
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break;
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case AST_CONTROL_BUSY:
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if (option_verbose > 2)
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ast_verbose( VERBOSE_PREFIX_3 "%s is busy\n", o->chan->name);
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o->stillgoing = 0;
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if (in->cdr)
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ast_cdr_busy(in->cdr);
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numbusies++;
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break;
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case AST_CONTROL_CONGESTION:
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if (option_verbose > 2)
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ast_verbose( VERBOSE_PREFIX_3 "%s is circuit-busy\n", o->chan->name);
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o->stillgoing = 0;
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if (in->cdr)
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ast_cdr_busy(in->cdr);
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numbusies++;
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break;
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case AST_CONTROL_RINGING:
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if (option_verbose > 2)
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ast_verbose( VERBOSE_PREFIX_3 "%s is ringing\n", o->chan->name);
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if (!sentringing) {
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ast_indicate(in, AST_CONTROL_RINGING);
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sentringing++;
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}
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break;
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case AST_CONTROL_OFFHOOK:
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/* Ignore going off hook */
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break;
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default:
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ast_log(LOG_DEBUG, "Dunno what to do with control type %d\n", f->subclass);
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}
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} else if (single && (f->frametype == AST_FRAME_VOICE) &&
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!(outgoing->ringbackonly || outgoing->musiconhold)) {
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if (ast_write(in, f))
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ast_log(LOG_WARNING, "Unable to forward frame\n");
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} else if (single && (f->frametype == AST_FRAME_IMAGE) &&
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!(outgoing->ringbackonly || outgoing->musiconhold)) {
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if (ast_write(in, f))
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ast_log(LOG_WARNING, "Unable to forward image\n");
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}
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ast_frfree(f);
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} else {
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o->stillgoing = 0;
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}
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}
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o = o->next;
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}
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if (winner == in) {
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f = ast_read(in);
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#if 0
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if (f && (f->frametype != AST_FRAME_VOICE))
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printf("Frame type: %d, %d\n", f->frametype, f->subclass);
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else if (!f || (f->frametype != AST_FRAME_VOICE))
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printf("Hangup received on %s\n", in->name);
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#endif
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if (!f || ((f->frametype == AST_FRAME_CONTROL) && (f->subclass == AST_CONTROL_HANGUP))) {
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/* Got hung up */
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*to=-1;
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return NULL;
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}
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if (f && (f->frametype == AST_FRAME_DTMF) && allowdisconnect &&
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(f->subclass == '*')) {
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if (option_verbose > 3)
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ast_verbose(VERBOSE_PREFIX_3 "User hit %c to disconnect call.\n", f->subclass);
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*to=0;
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return NULL;
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}
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if (single && ((f->frametype == AST_FRAME_VOICE) || (f->frametype == AST_FRAME_DTMF))) {
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if (ast_write(outgoing->chan, f))
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ast_log(LOG_WARNING, "Unable to forward voice\n");
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}
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}
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if (!*to && (option_verbose > 2))
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ast_verbose( VERBOSE_PREFIX_3 "Nobody picked up in %d ms\n", orig);
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}
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if (moh) {
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ast_moh_stop(in);
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} else if (ringind) {
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ast_indicate(in, -1);
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}
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return peer;
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}
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static int dial_exec(struct ast_channel *chan, void *data)
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{
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int res=-1;
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struct localuser *u;
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char info[256], *peers, *timeout, *tech, *number, *rest, *cur;
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struct localuser *outgoing=NULL, *tmp;
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struct ast_channel *peer;
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int to;
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int allowredir=0;
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int allowdisconnect=0;
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char numsubst[AST_MAX_EXTENSION];
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char restofit[AST_MAX_EXTENSION];
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char *transfer = NULL;
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char *newnum;
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if (!data) {
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ast_log(LOG_WARNING, "Dial requires an argument (technology1/number1&technology2/number2...|optional timeout)\n");
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return -1;
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}
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LOCAL_USER_ADD(u);
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/* Parse our arguments XXX Check for failure XXX */
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strncpy(info, (char *)data, strlen((char *)data) + AST_MAX_EXTENSION-1);
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peers = info;
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if (peers) {
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timeout = strchr(info, '|');
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if (timeout) {
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*timeout = '\0';
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timeout++;
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transfer = strchr(timeout, '|');
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if (transfer) {
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*transfer = '\0';
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transfer++;
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}
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}
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} else
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timeout = NULL;
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if (!peers || !strlen(peers)) {
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ast_log(LOG_WARNING, "Dial argument takes format (technology1/number1&technology2/number2...|optional timeout)\n");
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goto out;
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}
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cur = peers;
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do {
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/* Remember where to start next time */
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rest = strchr(cur, '&');
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if (rest) {
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*rest = 0;
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rest++;
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}
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/* Get a technology/[device:]number pair */
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tech = cur;
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number = strchr(tech, '/');
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if (!number) {
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ast_log(LOG_WARNING, "Dial argument takes format (technology1/[device:]number1&technology2/[device:]number2...|optional timeout)\n");
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goto out;
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}
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*number = '\0';
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number++;
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tmp = malloc(sizeof(struct localuser));
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if (!tmp) {
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ast_log(LOG_WARNING, "Out of memory\n");
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goto out;
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}
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memset(tmp, 0, sizeof(struct localuser));
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if (transfer) {
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if (strchr(transfer, 't'))
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tmp->allowredirect = 1;
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if (strchr(transfer, 'r'))
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tmp->ringbackonly = 1;
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if (strchr(transfer, 'm'))
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tmp->musiconhold = 1;
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if (strchr(transfer, 'd'))
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tmp->dataquality = 1;
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if (strchr(transfer, 'H'))
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tmp->allowdisconnect = 1;
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}
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strncpy(numsubst, number, sizeof(numsubst)-1);
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/* If we're dialing by extension, look at the extension to know what to dial */
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if ((newnum = strstr(numsubst, "BYEXTENSION"))) {
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strncpy(restofit, newnum + strlen("BYEXTENSION"), sizeof(restofit)-1);
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snprintf(newnum, sizeof(numsubst) - (newnum - numsubst), "%s%s", chan->exten,restofit);
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if (option_debug)
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ast_log(LOG_DEBUG, "Dialing by extension %s\n", numsubst);
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}
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/* Request the peer */
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tmp->chan = ast_request(tech, chan->nativeformats, numsubst);
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if (!tmp->chan) {
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/* If we can't, just go on to the next call */
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ast_log(LOG_NOTICE, "Unable to create channel of type '%s'\n", tech);
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if (chan->cdr)
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ast_cdr_busy(chan->cdr);
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free(tmp);
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cur = rest;
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continue;
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}
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if (strlen(tmp->chan->call_forward)) {
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if (option_verbose > 2)
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ast_verbose(VERBOSE_PREFIX_3 "Forwarding call to '%s@%s'\n", tmp->chan->call_forward, tmp->chan->context);
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/* Setup parameters */
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strncpy(chan->exten, tmp->chan->call_forward, sizeof(chan->exten));
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strncpy(chan->context, tmp->chan->context, sizeof(chan->context));
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chan->priority = 0;
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to = 0;
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ast_hangup(tmp->chan);
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free(tmp);
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cur = rest;
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break;
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}
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tmp->chan->appl = "AppDial";
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tmp->chan->data = "(Outgoing Line)";
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tmp->chan->whentohangup = 0;
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if (tmp->chan->callerid)
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free(tmp->chan->callerid);
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if (tmp->chan->ani)
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free(tmp->chan->ani);
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if (chan->callerid)
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tmp->chan->callerid = strdup(chan->callerid);
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else
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tmp->chan->callerid = NULL;
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if (chan->ani)
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tmp->chan->ani = strdup(chan->ani);
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else
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tmp->chan->ani = NULL;
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/* Presense of ADSI CPE on outgoing channel follows ours */
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tmp->chan->adsicpe = chan->adsicpe;
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/* Place the call, but don't wait on the answer */
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res = ast_call(tmp->chan, numsubst, 0);
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if (res) {
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/* Again, keep going even if there's an error */
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if (option_debug)
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ast_log(LOG_DEBUG, "ast call on peer returned %d\n", res);
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else if (option_verbose > 2)
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ast_verbose(VERBOSE_PREFIX_3 "Couldn't call %s\n", numsubst);
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ast_hangup(tmp->chan);
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free(tmp);
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cur = rest;
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continue;
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} else
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if (option_verbose > 2)
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ast_verbose(VERBOSE_PREFIX_3 "Called %s\n", numsubst);
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/* Put them in the list of outgoing thingies... We're ready now.
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XXX If we're forcibly removed, these outgoing calls won't get
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hung up XXX */
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tmp->stillgoing = -1;
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tmp->next = outgoing;
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outgoing = tmp;
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/* If this line is up, don't try anybody else */
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if (outgoing->chan->_state == AST_STATE_UP)
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break;
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cur = rest;
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} while(cur);
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if (timeout && strlen(timeout))
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to = atoi(timeout) * 1000;
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else
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to = -1;
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peer = wait_for_answer(chan, outgoing, &to, &allowredir, &allowdisconnect);
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if (!peer) {
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if (to)
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/* Musta gotten hung up */
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res = -1;
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else
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/* Nobody answered, next please? */
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res=0;
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goto out;
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}
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if (peer) {
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/* Ah ha! Someone answered within the desired timeframe. Of course after this
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we will always return with -1 so that it is hung up properly after the
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conversation. */
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hanguptree(outgoing, peer);
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outgoing = NULL;
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/* If appropriate, log that we have a destination channel */
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if (chan->cdr)
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ast_cdr_setdestchan(chan->cdr, peer->name);
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/* Make sure channels are compatible */
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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, "Had to drop call because I couldn't make %s compatible with %s\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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if (!strcmp(chan->type,"Zap")) {
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int x = 2;
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if (tmp->dataquality) x = 0;
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ast_channel_setoption(chan,AST_OPTION_TONE_VERIFY,&x,sizeof(char),0);
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}
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if (!strcmp(peer->type,"Zap")) {
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int x = 2;
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if (tmp->dataquality) x = 0;
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ast_channel_setoption(peer,AST_OPTION_TONE_VERIFY,&x,sizeof(char),0);
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}
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res = ast_bridge_call(chan, peer, allowredir, allowdisconnect);
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ast_hangup(peer);
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}
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out:
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hanguptree(outgoing, NULL);
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LOCAL_USER_REMOVE(u);
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return res;
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}
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int unload_module(void)
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{
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STANDARD_HANGUP_LOCALUSERS;
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return ast_unregister_application(app);
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}
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int load_module(void)
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{
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|
int res;
|
|
res = ast_register_application(app, dial_exec, synopsis, descrip);
|
|
return res;
|
|
}
|
|
|
|
char *description(void)
|
|
{
|
|
return tdesc;
|
|
}
|
|
|
|
int usecount(void)
|
|
{
|
|
int res;
|
|
STANDARD_USECOUNT(res);
|
|
return res;
|
|
}
|
|
|
|
char *key()
|
|
{
|
|
return ASTERISK_GPL_KEY;
|
|
}
|