res/res_parking.c

   1 /*
   2  * Asterisk -- A telephony toolkit for Linux.
   3  *
   4  * Routines implementing call parking
   5  *
   6  * Copyright (C) 1999, Mark Spencer
   7  *
   8  * Mark Spencer <markster@linux-support.net>
   9  *
  10  * This program is free software, distributed under the terms of
  11  * the GNU General Public License
  12  */
  13
  14 #include <asterisk/lock.h>
  15 #include <asterisk/file.h>
  16 #include <asterisk/logger.h>
  17 #include <asterisk/channel.h>
  18 #include <asterisk/pbx.h>
  19 #include <asterisk/options.h>
  20 #include <asterisk/module.h>
  21 #include <asterisk/translate.h>
  22 #include <asterisk/say.h>
  23 #include <asterisk/channel_pvt.h>
  24 #include <asterisk/parking.h>
  25 #include <asterisk/musiconhold.h>
  26 #include <asterisk/config.h>
  27 #include <stdlib.h>
  28 #include <errno.h>
  29 #include <unistd.h>
  30 #include <string.h>
  31 #include <stdlib.h>
  32 #include <stdio.h>
  33 #include <sys/time.h>
  34 #include <sys/signal.h>
  35 #include <netinet/in.h>
  36
  37 #include <pthread.h>
  38
  39 #define DEFAULT_PARK_TIME 45000
  40
  41 static char *parkedcall = "ParkedCall";
  42
  43 /* No more than 45 seconds parked before you do something with them */
  44 static int parkingtime = DEFAULT_PARK_TIME;
  45
  46 /* Context for which parking is made accessible */
  47 static char parking_con[AST_MAX_EXTENSION] = "parkedcalls";
  48
  49 /* Extension you type to park the call */
  50 static char parking_ext[AST_MAX_EXTENSION] = "700";
  51
  52 /* First available extension for parking */
  53 static int parking_start = 701;
  54
  55 /* Last available extension for parking */
  56 static int parking_stop = 750;
  57
  58 /* Registrar for operations */
  59 static char *registrar = "res_parking";
  60
  61 static char *synopsis = "Answer a parked call";
  62
  63 static char *descrip = "ParkedCall(exten):"
  64 "Used to connect to a parked call.  This Application is always\n"
  65 "registered internally and does not need to be explicitly added\n"
  66 "into the dialplan, although you should include the 'parkedcalls'\n"
  67 "context.\n";
  68
  69 struct parkeduser {
  70         struct ast_channel *chan;
  71         struct timeval start;
  72         int parkingnum;
  73         /* Where to go if our parking time expires */
  74         char context[AST_MAX_EXTENSION];
  75         char exten[AST_MAX_EXTENSION];
  76         int priority;
  77         int parkingtime;
  78         struct parkeduser *next;
  79 };
  80
  81 static struct parkeduser *parkinglot;
  82
  83 static pthread_mutex_t parking_lock = AST_MUTEX_INITIALIZER;
  84
  85 static pthread_t parking_thread;
  86
  87 STANDARD_LOCAL_USER;
  88
  89 LOCAL_USER_DECL;
  90
  91 char *ast_parking_ext(void)
  92 {
  93         return parking_ext;
  94 }
  95
  96 int ast_park_call(struct ast_channel *chan, struct ast_channel *peer, int timeout, int *extout)
  97 {
  98         /* We put the user in the parking list, then wake up the parking thread to be sure it looks
  99            after these channels too */
 100         struct parkeduser *pu, *cur;
 101         int x;
 102         pu = malloc(sizeof(struct parkeduser));
 103         if (pu) {
 104                 ast_pthread_mutex_lock(&parking_lock);
 105                 for (x=parking_start;x<=parking_stop;x++) {
 106                         cur = parkinglot;
 107                         while(cur) {
 108                                 if (cur->parkingnum == x)
 109                                         break;
 110                                 cur = cur->next;
 111                         }
 112                         if (!cur)
 113                                 break;
 114                 }
 115                 if (x <= parking_stop) {
 116                         pu->chan = chan;
 117                         ast_moh_start(pu->chan, NULL);
 118                         gettimeofday(&pu->start, NULL);
 119                         pu->parkingnum = x;
 120                         if (timeout > 0)
 121                                 pu->parkingtime = timeout;
 122                         else
 123                                 pu->parkingtime = parkingtime;
 124                         if (extout)
 125                                 *extout = x;
 126                         /* Remember what had been dialed, so that if the parking
 127                            expires, we try to come back to the same place */
 128                         strncpy(pu->context, chan->context, sizeof(pu->context)-1);
 129                         strncpy(pu->exten, chan->exten, sizeof(pu->exten)-1);
 130                         pu->priority = chan->priority;
 131                         pu->next = parkinglot;
 132                         parkinglot = pu;
 133                         ast_pthread_mutex_unlock(&parking_lock);
 134                         /* Wake up the (presumably select()ing) thread */
 135                         pthread_kill(parking_thread, SIGURG);
 136                         if (option_verbose > 1)
 137                                 ast_verbose(VERBOSE_PREFIX_2 "Parked %s on %d\n", pu->chan->name, pu->parkingnum);
 138                         if (peer)
 139                                 ast_say_digits(peer, pu->parkingnum, "", peer->language);
 140                         /* Start music on hold */
 141                         return 0;
 142                 } else {
 143                         ast_log(LOG_WARNING, "No more parking spaces\n");
 144                         free(pu);
 145                         ast_pthread_mutex_unlock(&parking_lock);
 146                         return -1;
 147                 }
 148         } else {
 149                 ast_log(LOG_WARNING, "Out of memory\n");
 150                 return -1;
 151         }
 152         return 0;
 153 }
 154
 155 int ast_masq_park_call(struct ast_channel *rchan, struct ast_channel *peer, int timeout, int *extout)
 156 {
 157         struct ast_channel *chan;
 158         struct ast_frame *f;
 159         /* Make a new, fake channel that we'll use to masquerade in the real one */
 160         chan = ast_channel_alloc(0);
 161         if (chan) {
 162                 /* Let us keep track of the channel name */
 163                 snprintf(chan->name, sizeof (chan->name), "Parked/%s",rchan->name);
 164                 /* Make formats okay */
 165                 chan->readformat = rchan->readformat;
 166                 chan->writeformat = rchan->writeformat;
 167                 ast_channel_masquerade(chan, rchan);
 168                 /* Setup the extensions and such */
 169                 strncpy(chan->context, rchan->context, sizeof(chan->context) - 1);
 170                 strncpy(chan->exten, rchan->exten, sizeof(chan->exten) - 1);
 171                 chan->priority = rchan->priority;
 172                 /* Make the masq execute */
 173                 f = ast_read(chan);
 174                 if (f)
 175                         ast_frfree(f);
 176                 ast_park_call(chan, peer, timeout, extout);
 177         } else {
 178                 ast_log(LOG_WARNING, "Unable to create parked channel\n");
 179                 return -1;
 180         }
 181         return 0;
 182 }
 183
 184 int ast_bridge_call(struct ast_channel *chan, struct ast_channel *peer, int allowredirect, int allowdisconnect)
 185 {
 186         /* Copy voice back and forth between the two channels.  Give the peer
 187            the ability to transfer calls with '#<extension' syntax. */
 188         int len;
 189         struct ast_frame *f;
 190         struct ast_channel *who;
 191         char newext[256], *ptr;
 192         int res;
 193         struct ast_option_header *aoh;
 194         /* Answer if need be */
 195         if (ast_answer(chan))
 196                 return -1;
 197         peer->appl = "Bridged Call";
 198         peer->data = chan->name;
 199         for (;;) {
 200                 res = ast_channel_bridge(chan, peer, (allowdisconnect ? AST_BRIDGE_DTMF_CHANNEL_0 : 0) + (allowredirect ? AST_BRIDGE_DTMF_CHANNEL_1 : 0), &f, &who);
 201                 if (res < 0) {
 202                         ast_log(LOG_WARNING, "Bridge failed on channels %s and %s\n", chan->name, peer->name);
 203                         return -1;
 204                 }
 205
 206                 if (!f || ((f->frametype == AST_FRAME_CONTROL) && ((f->subclass == AST_CONTROL_HANGUP) || (f->subclass == AST_CONTROL_BUSY) ||
 207                         (f->subclass == AST_CONTROL_CONGESTION)))) {
 208                                 res = -1;
 209                                 break;
 210                 }
 211                 if ((f->frametype == AST_FRAME_CONTROL) && (f->subclass == AST_CONTROL_RINGING)) {
 212                         if (who == chan)
 213                                 ast_indicate(peer, AST_CONTROL_RINGING);
 214                         else
 215                                 ast_indicate(chan, AST_CONTROL_RINGING);
 216                 }
 217                 if ((f->frametype == AST_FRAME_CONTROL) && (f->subclass == -1)) {
 218                         if (who == chan)
 219                                 ast_indicate(peer, -1);
 220                         else
 221                                 ast_indicate(chan, -1);
 222                 }
 223                 if ((f->frametype == AST_FRAME_CONTROL) && (f->subclass == AST_CONTROL_OPTION)) {
 224                         aoh = f->data;
 225                         /* Forward option Requests */
 226                         if (aoh && (aoh->flag == AST_OPTION_FLAG_REQUEST)) {
 227                                 if (who == chan)
 228                                         ast_channel_setoption(peer, ntohs(aoh->option), aoh->data, f->datalen - sizeof(struct ast_option_header), 0);
 229                                 else
 230                                         ast_channel_setoption(chan, ntohs(aoh->option), aoh->data, f->datalen - sizeof(struct ast_option_header), 0);
 231                         }
 232                 }
 233             if (f && (f->frametype == AST_FRAME_DTMF) && (who == chan) && allowdisconnect &&
 234                      (f->subclass == '*')) {
 235                 if (option_verbose > 3)
 236                         ast_verbose(VERBOSE_PREFIX_3 "User hit %c to disconnect call.\n", f->subclass);
 237                         res = -1;
 238                         break;
 239
 240                         }
 241                 if ((f->frametype == AST_FRAME_DTMF) && (who == peer) && allowredirect &&
 242                      (f->subclass == '#')) {
 243                                 /* Start autoservice on chan while we talk
 244                                    to the peer */
 245                                 ast_autoservice_start(chan);
 246                                 memset(newext, 0, sizeof(newext));
 247                                 ptr = newext;
 248                                         /* Transfer */
 249                                 if ((res=ast_streamfile(peer, "pbx-transfer", peer->language))) {
 250                                         ast_autoservice_stop(chan);
 251                                         break;
 252                                 }
 253                                 if ((res=ast_waitstream(peer, AST_DIGIT_ANY)) < 0) {
 254                                         ast_autoservice_stop(chan);
 255                                         break;
 256                                 }
 257                                 ast_stopstream(peer);
 258                                 if (res > 0) {
 259                                         /* If they've typed a digit already, handle it */
 260                                         newext[0] = res;
 261                                         ptr++;
 262                                         len --;
 263                                 }
 264                                 res = 0;
 265                                 while(strlen(newext) < sizeof(newext) - 1) {
 266                                         res = ast_waitfordigit(peer, 3000);
 267                                         if (res < 1)
 268                                                 break;
 269                                         if (res == '#')
 270                                                 break;
 271                                         *(ptr++) = res;
 272                                         if (!ast_matchmore_extension(peer, peer->context, newext, 1, peer->callerid)) {
 273                                                 break;
 274                                         }
 275                                 }
 276
 277                                 if (res < 0) {
 278                                         ast_autoservice_stop(chan);
 279                                         break;
 280                                 }
 281                                 if (!strcmp(newext, ast_parking_ext())) {
 282                                         if (ast_autoservice_stop(chan))
 283                                                 res = -1;
 284                                         else if (!ast_park_call(chan, peer, 0, NULL)) {
 285                                                 /* We return non-zero, but tell the PBX not to hang the channel when
 286                                                    the thread dies -- We have to be careful now though.  We are responsible for
 287                                                    hanging up the channel, else it will never be hung up! */
 288                                                 res=AST_PBX_KEEPALIVE;
 289                                                 break;
 290                                         } else {
 291                                                 ast_log(LOG_WARNING, "Unable to park call %s\n", chan->name);
 292                                         }
 293                                         /* XXX Maybe we should have another message here instead of invalid extension XXX */
 294                                 } else if (ast_exists_extension(chan, peer->context, newext, 1, peer->callerid)) {
 295                                         res=ast_autoservice_stop(chan);
 296                                         if (!chan->pbx) {
 297                                                 /* Doh!  Use our handy async_goto funcitons */
 298                                                 if (option_verbose > 2)
 299                                                         ast_verbose(VERBOSE_PREFIX_3 "Transferring %s to '%s' (context %s) priority 1\n", chan->name, chan->exten, chan->context);
 300                                                 if (ast_async_goto(chan, peer->context, newext, 1, 1))
 301                                                         ast_log(LOG_WARNING, "Async goto fialed :(\n");
 302                                         } else {
 303                                                 /* Set the channel's new extension, since it exists, using peer context */
 304                                                 strncpy(chan->exten, newext, sizeof(chan->exten)-1);
 305                                                 strncpy(chan->context, peer->context, sizeof(chan->context)-1);
 306                                                 chan->priority = 0;
 307                                                 ast_frfree(f);
 308                                         }
 309                                         break;
 310                                 } else {
 311                                         if (option_verbose > 2)
 312                                                 ast_verbose(VERBOSE_PREFIX_3 "Unable to find extension '%s' in context %s\n", newext, peer->context);
 313                                 }
 314                                 res = ast_streamfile(peer, "pbx-invalid", chan->language);
 315                                 if (res) {
 316                                         ast_autoservice_stop(chan);
 317                                         break;
 318                                 }
 319                                 res = ast_waitstream(peer, AST_DIGIT_ANY);
 320                                 ast_stopstream(peer);
 321                                 res = ast_autoservice_stop(chan);
 322                                 if (res) {
 323                                         if (option_verbose > 1)
 324                                                 ast_verbose(VERBOSE_PREFIX_2 "Hungup during autoservice stop on '%s'\n", chan->name);
 325                                 }
 326                         } else {
 327             if (f && (f->frametype == AST_FRAME_DTMF)) {
 328                   if (who == peer)
 329                         ast_write(chan, f);
 330                   else
 331                         ast_write(peer, f);
 332             }
 333 #if 1
 334                                 ast_log(LOG_DEBUG, "Read from %s (%d,%d)\n", who->name, f->frametype, f->subclass);
 335 #endif
 336                         }
 337          if (f)
 338                ast_frfree(f);
 339         }
 340         return res;
 341 }
 342
 343 static void *do_parking_thread(void *ignore)
 344 {
 345         int ms, tms, max;
 346         struct parkeduser *pu, *pl, *pt = NULL;
 347         struct timeval tv;
 348         struct ast_frame *f;
 349         int x;
 350         fd_set rfds, efds;
 351         fd_set nrfds, nefds;
 352         FD_ZERO(&rfds);
 353         FD_ZERO(&efds);
 354         for (;;) {
 355                 ms = -1;
 356                 max = -1;
 357                 ast_pthread_mutex_lock(&parking_lock);
 358                 pl = NULL;
 359                 pu = parkinglot;
 360                 gettimeofday(&tv, NULL);
 361                 FD_ZERO(&nrfds);
 362                 FD_ZERO(&nefds);
 363                 while(pu) {
 364                         tms = (tv.tv_sec - pu->start.tv_sec) * 1000 + (tv.tv_usec - pu->start.tv_usec) / 1000;
 365                         if (tms > pu->parkingtime) {
 366                                 /* They've been waiting too long, send them back to where they came.  Theoretically they
 367                                    should have their original extensions and such, but we copy to be on the safe side */
 368                                 strncpy(pu->chan->exten, pu->exten, sizeof(pu->chan->exten)-1);
 369                                 strncpy(pu->chan->context, pu->context, sizeof(pu->chan->context)-1);
 370                                 pu->chan->priority = pu->priority;
 371                                 /* Stop music on hold */
 372                                 ast_moh_stop(pu->chan);
 373                                 /* Start up the PBX, or hang them up */
 374                                 if (ast_pbx_start(pu->chan))  {
 375                                         ast_log(LOG_WARNING, "Unable to restart the PBX for user on '%s', hanging them up...\n", pu->chan->name);
 376                                         ast_hangup(pu->chan);
 377                                 }
 378                                 /* And take them out of the parking lot */
 379                                 if (pl)
 380                                         pl->next = pu->next;
 381                                 else
 382                                         parkinglot = pu->next;
 383                                 pt = pu;
 384                                 pu = pu->next;
 385                                 free(pt);
 386                         } else {
 387                                 for (x=0;x<AST_MAX_FDS;x++) {
 388                                         if ((pu->chan->fds[x] > -1) && (FD_ISSET(pu->chan->fds[x], &rfds) || FD_ISSET(pu->chan->fds[x], &efds))) {
 389                                                         if (FD_ISSET(pu->chan->fds[x], &efds))
 390                                                                 pu->chan->exception = 1;
 391                                                         pu->chan->fdno = x;
 392                                                         /* See if they need servicing */
 393                                                         f = ast_read(pu->chan);
 394                                                         if (!f || ((f->frametype == AST_FRAME_CONTROL) && (f->subclass ==  AST_CONTROL_HANGUP))) {
 395                                                         /* There's a problem, hang them up*/
 396                                                         if (option_verbose > 1)
 397                                                                 ast_verbose(VERBOSE_PREFIX_2 "%s got tired of being parked\n", pu->chan->name);
 398                                                         ast_hangup(pu->chan);
 399                                                         /* And take them out of the parking lot */
 400                                                         if (pl)
 401                                                                 pl->next = pu->next;
 402                                                         else
 403                                                                 parkinglot = pu->next;
 404                                                         pt = pu;
 405                                                         pu = pu->next;
 406                                                         free(pt);
 407                                                         break;
 408                                                 } else {
 409                                                         /* XXX Maybe we could do something with packets, like dial "0" for operator or something XXX */
 410                                                         ast_frfree(f);
 411                                                         goto std;       /* XXX Ick: jumping into an else statement??? XXX */
 412                                                 }
 413                                         }
 414                                 }
 415                                 if (x >= AST_MAX_FDS) {
 416 std:                                    for (x=0;x<AST_MAX_FDS;x++) {
 417                                                 /* Keep this one for next one */
 418                                                 if (pu->chan->fds[x] > -1) {
 419                                                         FD_SET(pu->chan->fds[x], &nrfds);
 420                                                         FD_SET(pu->chan->fds[x], &nefds);
 421                                                         if (pu->chan->fds[x] > max)
 422                                                                 max = pu->chan->fds[x];
 423                                                 }
 424                                         }
 425                                         /* Keep track of our longest wait */
 426                                         if ((tms < ms) || (ms < 0))
 427                                                 ms = tms;
 428                                         pl = pu;
 429                                         pu = pu->next;
 430                                 }
 431                         }
 432                 }
 433                 ast_pthread_mutex_unlock(&parking_lock);
 434                 rfds = nrfds;
 435                 efds = nefds;
 436                 tv.tv_sec = ms / 1000;
 437                 tv.tv_usec = (ms % 1000) * 1000;
 438                 /* Wait for something to happen */
 439                 select(max + 1, &rfds, NULL, &efds, (ms > -1) ? &tv : NULL);
 440                 pthread_testcancel();
 441         }
 442         return NULL;    /* Never reached */
 443 }
 444
 445 static int park_exec(struct ast_channel *chan, void *data)
 446 {
 447         int res=0;
 448         struct localuser *u;
 449         struct ast_channel *peer=NULL;
 450         struct parkeduser *pu, *pl=NULL;
 451         int park;
 452         int dres;
 453         if (!data) {
 454                 ast_log(LOG_WARNING, "Park requires an argument (extension number)\n");
 455                 return -1;
 456         }
 457         LOCAL_USER_ADD(u);
 458         park = atoi((char *)data);
 459         ast_pthread_mutex_lock(&parking_lock);
 460         pu = parkinglot;
 461         while(pu) {
 462                 if (pu->parkingnum == park) {
 463                         if (pl)
 464                                 pl->next = pu->next;
 465                         else
 466                                 parkinglot = pu->next;
 467                         break;
 468                 }
 469                 pl = pu;
 470                 pu = pu->next;
 471         }
 472         ast_pthread_mutex_unlock(&parking_lock);
 473         if (pu) {
 474                 peer = pu->chan;
 475                 free(pu);
 476         }
 477         /* JK02: it helps to answer the channel if not already up */
 478         if (chan->_state != AST_STATE_UP) {
 479                 ast_answer(chan);
 480         }
 481
 482         if (peer) {
 483                 ast_moh_stop(peer);
 484                 res = ast_channel_make_compatible(chan, peer);
 485                 if (res < 0) {
 486                         ast_log(LOG_WARNING, "Could not make channels %s and %s compatible for bridge\n", chan->name, peer->name);
 487                         ast_hangup(peer);
 488                         return -1;
 489                 }
 490                 /* This runs sorta backwards, since we give the incoming channel control, as if it
 491                    were the person called. */
 492                 if (option_verbose > 2)
 493                         ast_verbose(VERBOSE_PREFIX_3 "Channel %s connected to parked call %d\n", chan->name, park);
 494                 res = ast_bridge_call(peer, chan, 1, 0);
 495                 /* Simulate the PBX hanging up */
 496                 if (res != AST_PBX_KEEPALIVE)
 497                         ast_hangup(peer);
 498                 return -1;
 499         } else {
 500                 /* XXX Play a message XXX */
 501           dres = ast_streamfile(chan, "pbx-invalidpark", chan->language);
 502           if (!dres)
 503             dres = ast_waitstream(chan, "");
 504           else {
 505             ast_log(LOG_WARNING, "ast_streamfile of %s failed on %s\n", "pbx-invalidpark", chan->name);
 506             dres = 0;
 507           }
 508                 if (option_verbose > 2)
 509                         ast_verbose(VERBOSE_PREFIX_3 "Channel %s tried to talk to non-existant parked call %d\n", chan->name, park);
 510                 res = -1;
 511         }
 512         LOCAL_USER_REMOVE(u);
 513         return res;
 514 }
 515
 516 int load_module(void)
 517 {
 518         int res;
 519         int x;
 520         int start, end;
 521         struct ast_context *con;
 522         char exten[AST_MAX_EXTENSION];
 523         struct ast_config *cfg;
 524         struct ast_variable *var;
 525         cfg = ast_load("parking.conf");
 526         if (cfg) {
 527                 var = ast_variable_browse(cfg, "general");
 528                 while(var) {
 529                         if (!strcasecmp(var->name, "parkext")) {
 530                                 strncpy(parking_ext, var->value, sizeof(parking_ext) - 1);
 531                         } else if (!strcasecmp(var->name, "context")) {
 532                                 strncpy(parking_con, var->value, sizeof(parking_con) - 1);
 533                         } else if (!strcasecmp(var->name, "parkingtime")) {
 534                                 if ((sscanf(var->value, "%d", &parkingtime) != 1) || (parkingtime < 1)) {
 535                                         ast_log(LOG_WARNING, "%s is not a valid parkingtime\n", var->value);
 536                                         parkingtime = DEFAULT_PARK_TIME;
 537                                 } else
 538                                         parkingtime = parkingtime * 1000;
 539                         } else if (!strcasecmp(var->name, "parkpos")) {
 540                                 if (sscanf(var->value, "%i-%i", &start, &end) != 2) {
 541                                         ast_log(LOG_WARNING, "Format for parking positions is a-b, where a and b are numbers at line %d of parking.conf\n", var->lineno);
 542                                 } else {
 543                                         parking_start = start;
 544                                         parking_stop = end;
 545                                 }
 546                         }
 547                         var = var->next;
 548                 }
 549                 ast_destroy(cfg);
 550         }
 551         con = ast_context_find(parking_con);
 552         if (!con) {
 553                 con = ast_context_create(parking_con, registrar);
 554                 if (!con) {
 555                         ast_log(LOG_ERROR, "Parking context '%s' does not exist and unable to create\n", parking_con);
 556                         return -1;
 557                 }
 558         }
 559         for(x=parking_start; x<=parking_stop;x++) {
 560                 snprintf(exten, sizeof(exten), "%d", x);
 561                 ast_add_extension2(con, 1, exten, 1, NULL, parkedcall, strdup(exten), free, registrar);
 562         }
 563         pthread_create(&parking_thread, NULL, do_parking_thread, NULL);
 564         res = ast_register_application(parkedcall, park_exec, synopsis, descrip);
 565         return res;
 566 }
 567
 568 int unload_module(void)
 569 {
 570         STANDARD_HANGUP_LOCALUSERS;
 571         return ast_unregister_application(parkedcall);
 572 }
 573
 574 char *description(void)
 575 {
 576         return "Call Parking Resource";
 577 }
 578
 579 int usecount(void)
 580 {
 581         /* Never allow parking to be unloaded because it will
 582            unresolve needed symbols in the dialer */
 583 #if 0
 584         int res;
 585         STANDARD_USECOUNT(res);
 586         return res;
 587 #else
 588         return 1;
 589 #endif
 590 }
 591
 592 char *key()
 593 {
 594         return ASTERISK_GPL_KEY;
 595 }