channels/chan_agent.c

   1 /*
   2  * Asterisk -- A telephony toolkit for Linux.
   3  *
   4  * Implementation of Session Initiation Protocol
   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 <stdio.h>
  15 #include <pthread.h>
  16 #include <string.h>
  17 #include <asterisk/lock.h>
  18 #include <asterisk/channel.h>
  19 #include <asterisk/channel_pvt.h>
  20 #include <asterisk/config.h>
  21 #include <asterisk/logger.h>
  22 #include <asterisk/module.h>
  23 #include <asterisk/pbx.h>
  24 #include <asterisk/options.h>
  25 #include <asterisk/lock.h>
  26 #include <asterisk/sched.h>
  27 #include <asterisk/io.h>
  28 #include <asterisk/rtp.h>
  29 #include <asterisk/acl.h>
  30 #include <asterisk/callerid.h>
  31 #include <asterisk/file.h>
  32 #include <asterisk/cli.h>
  33 #include <asterisk/app.h>
  34 #include <asterisk/musiconhold.h>
  35 #include <asterisk/manager.h>
  36 #include <asterisk/parking.h>
  37 #include <sys/socket.h>
  38 #include <errno.h>
  39 #include <unistd.h>
  40 #include <stdlib.h>
  41 #include <fcntl.h>
  42 #include <netdb.h>
  43 #include <arpa/inet.h>
  44 #include <sys/signal.h>
  45
  46 static char *desc = "Agent Proxy Channel";
  47 static char *type = "Agent";
  48 static char *tdesc = "Call Agent Proxy Channel";
  49 static char *config = "agents.conf";
  50
  51 static char *app = "AgentLogin";
  52 static char *app2 = "AgentCallbackLogin";
  53
  54 static char *synopsis = "Call agent login";
  55 static char *synopsis2 = "Call agent callback login";
  56
  57 static char *descrip =
  58 "  AgentLogin([AgentNo][|options]):\n"
  59 "Asks the agent to login to the system.  Always returns -1.  While\n"
  60 "logged in, the agent can receive calls and will hear a 'beep'\n"
  61 "when a new call comes in.  The agent can dump the call by pressing\n"
  62 "the star key.\n"
  63 "The option string may contain zero or more of the following characters:\n"
  64 "      's' -- silent login - do not announce the login ok segment\n";
  65
  66 static char *descrip2 =
  67 "  AgentCallbackLogin([AgentNo][|[options][exten]@context]):\n"
  68 "Asks the agent to login to the system with callback.  Always returns -1.\n"
  69 "The agent's callback extension is called (optionally with the specified\n"
  70 "context. \n";
  71
  72 static char moh[80] = "default";
  73
  74 #define AST_MAX_AGENT   80              /* Agent ID or Password max length */
  75
  76 static int capability = -1;
  77
  78 static unsigned int group;
  79 static int autologoff;
  80 static int wrapuptime;
  81 static int ackcall;
  82
  83 static int usecnt =0;
  84 static ast_mutex_t usecnt_lock = AST_MUTEX_INITIALIZER;
  85
  86 /* Protect the interface list (of sip_pvt's) */
  87 static ast_mutex_t agentlock = AST_MUTEX_INITIALIZER;
  88
  89 static struct agent_pvt {
  90         ast_mutex_t lock;                               /* Channel private lock */
  91         int dead;                                                       /* Poised for destruction? */
  92         int pending;                                            /* Not a real agent -- just pending a match */
  93         int abouttograb;                                        /* About to grab */
  94         int autologoff;                                 /* Auto timeout time */
  95         int ackcall;                                    /* ackcall */
  96         time_t start;                                           /* When call started */
  97         struct timeval lastdisc;                        /* When last disconnected */
  98         int wrapuptime;                                         /* Wrapup time in ms */
  99         unsigned int group;                                     /* Group memberships */
 100         int acknowledged;                                       /* Acknowledged */
 101         char moh[80];                                           /* Which music on hold */
 102         char agent[AST_MAX_AGENT];                      /* Agent ID */
 103         char password[AST_MAX_AGENT];           /* Password for Agent login */
 104         char name[AST_MAX_AGENT];
 105         ast_mutex_t app_lock;                   /* Synchronization between owning applications */
 106         volatile pthread_t owning_app;          /* Owning application thread id */
 107         volatile int app_sleep_cond;            /* Sleep condition for the login app */
 108         struct ast_channel *owner;                      /* Agent */
 109         char loginchan[80];
 110         struct ast_channel *chan;                       /* Channel we use */
 111         struct agent_pvt *next;                         /* Agent */
 112 } *agents = NULL;
 113
 114 #define CHECK_FORMATS(ast, p) do { \
 115         if (p->chan) {\
 116                 if (ast->nativeformats != p->chan->nativeformats) { \
 117                         ast_log(LOG_DEBUG, "Native formats changing from %d to %d\n", ast->nativeformats, p->chan->nativeformats); \
 118                         /* Native formats changed, reset things */ \
 119                         ast->nativeformats = p->chan->nativeformats; \
 120                         ast_log(LOG_DEBUG, "Resetting read to %d and write to %d\n", ast->readformat, ast->writeformat);\
 121                         ast_set_read_format(ast, ast->readformat); \
 122                         ast_set_write_format(ast, ast->writeformat); \
 123                 } \
 124                 if (p->chan->readformat != ast->pvt->rawreadformat)  \
 125                         ast_set_read_format(p->chan, ast->pvt->rawreadformat); \
 126                 if (p->chan->writeformat != ast->pvt->rawwriteformat) \
 127                         ast_set_write_format(p->chan, ast->pvt->rawwriteformat); \
 128         } \
 129 } while(0)
 130
 131 #define CLEANUP(ast, p) do { \
 132         int x; \
 133         if (p->chan) { \
 134                 for (x=0;x<AST_MAX_FDS;x++) \
 135                         ast->fds[x] = p->chan->fds[x]; \
 136         } \
 137 } while(0)
 138
 139
 140 static void agent_unlink(struct agent_pvt *agent)
 141 {
 142         struct agent_pvt *p, *prev;
 143         prev = NULL;
 144         p = agents;
 145         while(p) {
 146                 if (p == agent) {
 147                         if (prev)
 148                                 prev->next = agent->next;
 149                         else
 150                                 agents = agent->next;
 151                         break;
 152                 }
 153                 prev = p;
 154                 p = p->next;
 155         }
 156 }
 157
 158 static struct agent_pvt *add_agent(char *agent, int pending)
 159 {
 160         char tmp[256];
 161         char *password=NULL, *name=NULL;
 162         struct agent_pvt *p, *prev;
 163
 164         strncpy(tmp, agent, sizeof(tmp));
 165         if ((password = strchr(tmp, ','))) {
 166                 *password = '\0';
 167                 password++;
 168                 while (*password < 33) password++;
 169         }
 170         if (password && (name = strchr(password, ','))) {
 171                 *name = '\0';
 172                 name++;
 173                 while (*name < 33) name++;
 174         }
 175         prev=NULL;
 176         p = agents;
 177         while(p) {
 178                 if (!pending && !strcmp(p->agent, tmp))
 179                         break;
 180                 prev = p;
 181                 p = p->next;
 182         }
 183         if (!p) {
 184                 p = malloc(sizeof(struct agent_pvt));
 185                 if (p) {
 186                         memset(p, 0, sizeof(struct agent_pvt));
 187                         strncpy(p->agent, tmp, sizeof(p->agent) -1);
 188                         ast_mutex_init( &p->lock );
 189                         ast_mutex_init( &p->app_lock );
 190                         p->owning_app = -1;
 191                         p->app_sleep_cond = 1;
 192                         p->group = group;
 193                         p->pending = pending;
 194                         p->next = NULL;
 195                         if (prev)
 196                                 prev->next = p;
 197                         else
 198                                 agents = p;
 199
 200                 }
 201         }
 202         if (!p)
 203                 return NULL;
 204         strncpy(p->password, password ? password : "", sizeof(p->password) - 1);
 205         strncpy(p->name, name ? name : "", sizeof(p->name) - 1);
 206         strncpy(p->moh, moh, sizeof(p->moh) - 1);
 207         p->ackcall = ackcall;
 208         p->autologoff = autologoff;
 209         p->wrapuptime = wrapuptime;
 210         if (pending)
 211                 p->dead = 1;
 212         else
 213                 p->dead = 0;
 214         return p;
 215 }
 216
 217 static int agent_cleanup(struct agent_pvt *p)
 218 {
 219         struct ast_channel *chan = p->owner;
 220         p->owner = NULL;
 221         chan->pvt->pvt = NULL;
 222         p->app_sleep_cond = 1;
 223         /* Release ownership of the agent to other threads (presumably running the login app). */
 224         ast_mutex_unlock(&p->app_lock);
 225         if (chan)
 226                 ast_channel_free(chan);
 227         if (p->dead)
 228                 free(p);
 229         return 0;
 230 }
 231
 232 static int check_availability(struct agent_pvt *newlyavailable, int needlock);
 233
 234 static int agent_answer(struct ast_channel *ast)
 235 {
 236         ast_log(LOG_WARNING, "Huh?  Agent is being asked to answer?\n");
 237         return -1;
 238 }
 239
 240 static struct ast_frame  *agent_read(struct ast_channel *ast)
 241 {
 242         struct agent_pvt *p = ast->pvt->pvt;
 243         struct ast_frame *f = NULL;
 244         static struct ast_frame null_frame = { AST_FRAME_NULL, };
 245         static struct ast_frame answer_frame = { AST_FRAME_CONTROL, AST_CONTROL_ANSWER };
 246         ast_mutex_lock(&p->lock);
 247         CHECK_FORMATS(ast, p);
 248         if (p->chan) {
 249                 p->chan->exception = ast->exception;
 250                 p->chan->fdno = ast->fdno;
 251                 f = ast_read(p->chan);
 252         } else
 253                 f = &null_frame;
 254         if (!f) {
 255                 /* If there's a channel, hang it up  (if it's on a callback) make it NULL */
 256                 if (p->chan) {
 257                         if (strlen(p->loginchan))
 258                                 ast_hangup(p->chan);
 259                         p->chan = NULL;
 260                         p->acknowledged = 0;
 261                 }
 262         }
 263         if (f && (f->frametype == AST_FRAME_CONTROL) && (f->subclass == AST_CONTROL_ANSWER)) {
 264 /* TC */
 265                 if (p->ackcall) {
 266                         if (option_verbose > 2)
 267                                 ast_verbose(VERBOSE_PREFIX_3 "%s answered, waiting for '#' to acknowledge\n", p->chan->name);
 268                         /* Don't pass answer along */
 269                         ast_frfree(f);
 270                         f = &null_frame;
 271                 }
 272         else {
 273                         p->acknowledged = 1;
 274                         f = &answer_frame;
 275         }
 276         }
 277         if (f && (f->frametype == AST_FRAME_DTMF) && (f->subclass == '#')) {
 278                 if (!p->acknowledged) {
 279                         if (option_verbose > 2)
 280                                 ast_verbose(VERBOSE_PREFIX_3 "%s acknowledged\n", p->chan->name);
 281                         p->acknowledged = 1;
 282                         ast_frfree(f);
 283                         f = &answer_frame;
 284                 }
 285         }
 286         if (f && (f->frametype == AST_FRAME_DTMF) && (f->subclass == '*')) {
 287                 /* * terminates call */
 288                 ast_frfree(f);
 289                 f = NULL;
 290         }
 291         CLEANUP(ast,p);
 292         ast_mutex_unlock(&p->lock);
 293         return f;
 294 }
 295
 296 static int agent_write(struct ast_channel *ast, struct ast_frame *f)
 297 {
 298         struct agent_pvt *p = ast->pvt->pvt;
 299         int res = -1;
 300         CHECK_FORMATS(ast, p);
 301         ast_mutex_lock(&p->lock);
 302         if (p->chan) {
 303                 if ((f->frametype != AST_FRAME_VOICE) ||
 304                         (f->subclass == p->chan->writeformat)) {
 305                         res = ast_write(p->chan, f);
 306                 } else {
 307                         ast_log(LOG_DEBUG, "Dropping one incompatible voice frame on '%s' to '%s'\n", ast->name, p->chan->name);
 308                         res = 0;
 309                 }
 310         } else
 311                 res = 0;
 312         CLEANUP(ast, p);
 313         ast_mutex_unlock(&p->lock);
 314         return res;
 315 }
 316
 317 static int agent_fixup(struct ast_channel *oldchan, struct ast_channel *newchan)
 318 {
 319         struct agent_pvt *p = newchan->pvt->pvt;
 320         ast_mutex_lock(&p->lock);
 321         if (p->owner != oldchan) {
 322                 ast_log(LOG_WARNING, "old channel wasn't %p but was %p\n", oldchan, p->owner);
 323                 ast_mutex_unlock(&p->lock);
 324                 return -1;
 325         }
 326         p->owner = newchan;
 327         ast_mutex_unlock(&p->lock);
 328         return 0;
 329 }
 330
 331 static int agent_indicate(struct ast_channel *ast, int condition)
 332 {
 333         struct agent_pvt *p = ast->pvt->pvt;
 334         int res = -1;
 335         ast_mutex_lock(&p->lock);
 336         if (p->chan)
 337                 res = ast_indicate(p->chan, condition);
 338         else
 339                 res = 0;
 340         ast_mutex_unlock(&p->lock);
 341         return res;
 342 }
 343
 344 static int agent_digit(struct ast_channel *ast, char digit)
 345 {
 346         struct agent_pvt *p = ast->pvt->pvt;
 347         int res = -1;
 348         ast_mutex_lock(&p->lock);
 349         if (p->chan)
 350                 res = p->chan->pvt->send_digit(p->chan, digit);
 351         else
 352                 res = 0;
 353         ast_mutex_unlock(&p->lock);
 354         return res;
 355 }
 356
 357 static int agent_call(struct ast_channel *ast, char *dest, int timeout)
 358 {
 359         struct agent_pvt *p = ast->pvt->pvt;
 360         int res = -1;
 361         ast_mutex_lock(&p->lock);
 362         if (!p->chan) {
 363                 if (p->pending) {
 364                         ast_log(LOG_DEBUG, "Pretending to dial on pending agent\n");
 365                         ast_setstate(ast, AST_STATE_DIALING);
 366                         res = 0;
 367                 } else {
 368                         ast_log(LOG_NOTICE, "Whoa, they hung up between alloc and call...  what are the odds of that?\n");
 369                         res = -1;
 370                 }
 371                 ast_mutex_unlock(&p->lock);
 372                 return res;
 373         } else if (strlen(p->loginchan)) {
 374                 time(&p->start);
 375                 /* Call on this agent */
 376                 if (option_verbose > 2)
 377                         ast_verbose(VERBOSE_PREFIX_3 "outgoing agentcall, to agent '%s', on '%s'\n", p->agent, p->chan->name);
 378                 if (p->chan->callerid)
 379                         free(p->chan->callerid);
 380                 if (ast->callerid)
 381                         p->chan->callerid = strdup(ast->callerid);
 382                 else
 383                         p->chan->callerid = NULL;
 384                 res = ast_call(p->chan, p->loginchan, 0);
 385                 CLEANUP(ast,p);
 386                 ast_mutex_unlock(&p->lock);
 387                 return res;
 388         }
 389         ast_verbose( VERBOSE_PREFIX_3 "agent_call, call to agent '%s' call on '%s'\n", p->agent, p->chan->name);
 390         ast_log( LOG_DEBUG, "Playing beep, lang '%s'\n", p->chan->language);
 391         res = ast_streamfile(p->chan, "beep", p->chan->language);
 392         ast_log( LOG_DEBUG, "Played beep, result '%d'\n", res);
 393         if (!res) {
 394                 res = ast_waitstream(p->chan, "");
 395                 ast_log( LOG_DEBUG, "Waited for stream, result '%d'\n", res);
 396         }
 397         if (!res) {
 398                 res = ast_set_read_format(p->chan, ast_best_codec(p->chan->nativeformats));
 399                 ast_log( LOG_DEBUG, "Set read format, result '%d'\n", res);
 400                 if (res)
 401                         ast_log(LOG_WARNING, "Unable to set read format to %s\n", ast_getformatname(ast_best_codec(p->chan->nativeformats)));
 402         } else {
 403                 // Agent hung-up
 404                 p->chan = NULL;
 405         }
 406
 407         if (!res) {
 408                 ast_set_write_format(p->chan, ast_best_codec(p->chan->nativeformats));
 409                 ast_log( LOG_DEBUG, "Set write format, result '%d'\n", res);
 410                 if (res)
 411                         ast_log(LOG_WARNING, "Unable to set write format to %s\n", ast_getformatname(ast_best_codec(p->chan->nativeformats)));
 412         }
 413         if( !res )
 414         {
 415                 /* Call is immediately up */
 416                 ast_setstate(ast, AST_STATE_UP);
 417         }
 418         CLEANUP(ast,p);
 419         ast_mutex_unlock(&p->lock);
 420         return res;
 421 }
 422
 423 static int agent_hangup(struct ast_channel *ast)
 424 {
 425         struct agent_pvt *p = ast->pvt->pvt;
 426         int howlong = 0;
 427         ast_mutex_lock(&p->lock);
 428         p->owner = NULL;
 429         ast->pvt->pvt = NULL;
 430         p->app_sleep_cond = 1;
 431         if (p->start && (ast->_state != AST_STATE_UP))
 432                 howlong = time(NULL) - p->start;
 433         time(&p->start);
 434         if (p->chan) {
 435                 /* If they're dead, go ahead and hang up on the agent now */
 436                 if (strlen(p->loginchan)) {
 437                         p->acknowledged = 0;
 438                         if (p->chan) {
 439                                 /* Recognize the hangup and pass it along immediately */
 440                                 ast_hangup(p->chan);
 441                                 p->chan = NULL;
 442                         }
 443                         ast_log(LOG_DEBUG, "Hungup, howlong is %d, autologoff is %d\n", howlong, p->autologoff);
 444                         if (howlong  && p->autologoff && (howlong > p->autologoff)) {
 445                                 ast_log(LOG_NOTICE, "Agent '%s' didn't answer/confirm within %d seconds (waited %d)\n", p->name, p->autologoff, howlong);
 446                                 strcpy(p->loginchan, "");
 447                         }
 448                 } else if (p->dead) {
 449                         ast_mutex_lock(&p->chan->lock);
 450                         ast_softhangup(p->chan, AST_SOFTHANGUP_EXPLICIT);
 451                         ast_mutex_unlock(&p->chan->lock);
 452                 } else {
 453                         ast_mutex_lock(&p->chan->lock);
 454                         ast_moh_start(p->chan, p->moh);
 455                         ast_mutex_unlock(&p->chan->lock);
 456                 }
 457         }
 458 #if 0
 459                 ast_mutex_unlock(&p->lock);
 460                 /* Release ownership of the agent to other threads (presumably running the login app). */
 461                 ast_mutex_unlock(&p->app_lock);
 462         } else if (p->dead) {
 463                 /* Go ahead and lose it */
 464                 ast_mutex_unlock(&p->lock);
 465                 /* Release ownership of the agent to other threads (presumably running the login app). */
 466                 ast_mutex_unlock(&p->app_lock);
 467         } else {
 468                 ast_mutex_unlock(&p->lock);
 469                 /* Release ownership of the agent to other threads (presumably running the login app). */
 470                 ast_mutex_unlock(&p->app_lock);
 471         }
 472 #endif
 473         ast_mutex_unlock(&p->lock);
 474         /* Release ownership of the agent to other threads (presumably running the login app). */
 475         ast_mutex_unlock(&p->app_lock);
 476
 477         if (p->pending) {
 478                 ast_mutex_lock(&agentlock);
 479                 agent_unlink(p);
 480                 ast_mutex_unlock(&agentlock);
 481         }
 482         if (p->abouttograb) {
 483                 /* Let the "about to grab" thread know this isn't valid anymore, and let it
 484                    kill it later */
 485                 p->abouttograb = 0;
 486         } else if (p->dead) {
 487                 free(p);
 488         } else if (p->chan) {
 489                 /* Not dead -- check availability now */
 490                 ast_mutex_lock(&p->lock);
 491                 /* Store last disconnect time */
 492                 gettimeofday(&p->lastdisc, NULL);
 493                 ast_mutex_unlock(&p->lock);
 494         }
 495         return 0;
 496 }
 497
 498 static int agent_cont_sleep( void *data )
 499 {
 500         struct agent_pvt *p;
 501         struct timeval tv;
 502         int res;
 503
 504         p = (struct agent_pvt *)data;
 505
 506         ast_mutex_lock(&p->lock);
 507         res = p->app_sleep_cond;
 508         if (p->lastdisc.tv_sec) {
 509                 gettimeofday(&tv, NULL);
 510                 if ((tv.tv_sec - p->lastdisc.tv_sec) * 1000 +
 511                         (tv.tv_usec - p->lastdisc.tv_usec) / 1000 > p->wrapuptime)
 512                         res = 1;
 513         }
 514         ast_mutex_unlock(&p->lock);
 515 #if 0
 516         if( !res )
 517                 ast_log( LOG_DEBUG, "agent_cont_sleep() returning %d\n", res );
 518 #endif
 519         return res;
 520 }
 521
 522 static struct ast_channel *agent_new(struct agent_pvt *p, int state)
 523 {
 524         struct ast_channel *tmp;
 525         struct ast_frame null_frame = { AST_FRAME_NULL };
 526 #if 0
 527         if (!p->chan) {
 528                 ast_log(LOG_WARNING, "No channel? :(\n");
 529                 return NULL;
 530         }
 531 #endif
 532         tmp = ast_channel_alloc(0);
 533         if (tmp) {
 534                 if (p->chan) {
 535                         tmp->nativeformats = p->chan->nativeformats;
 536                         tmp->writeformat = p->chan->writeformat;
 537                         tmp->pvt->rawwriteformat = p->chan->writeformat;
 538                         tmp->readformat = p->chan->readformat;
 539                         tmp->pvt->rawreadformat = p->chan->readformat;
 540                         strncpy(tmp->language, p->chan->language, sizeof(tmp->language)-1);
 541                         strncpy(tmp->context, p->chan->context, sizeof(tmp->context)-1);
 542                         strncpy(tmp->exten, p->chan->exten, sizeof(tmp->exten)-1);
 543                 } else {
 544                         tmp->nativeformats = AST_FORMAT_SLINEAR;
 545                         tmp->writeformat = AST_FORMAT_SLINEAR;
 546                         tmp->pvt->rawwriteformat = AST_FORMAT_SLINEAR;
 547                         tmp->readformat = AST_FORMAT_SLINEAR;
 548                         tmp->pvt->rawreadformat = AST_FORMAT_SLINEAR;
 549                 }
 550                 if (p->pending)
 551                         snprintf(tmp->name, sizeof(tmp->name), "Agent/P%s-%d", p->agent, rand() & 0xffff);
 552                 else
 553                         snprintf(tmp->name, sizeof(tmp->name), "Agent/%s", p->agent);
 554                 tmp->type = type;
 555                 ast_setstate(tmp, state);
 556                 tmp->pvt->pvt = p;
 557                 tmp->pvt->send_digit = agent_digit;
 558                 tmp->pvt->call = agent_call;
 559                 tmp->pvt->hangup = agent_hangup;
 560                 tmp->pvt->answer = agent_answer;
 561                 tmp->pvt->read = agent_read;
 562                 tmp->pvt->write = agent_write;
 563                 tmp->pvt->exception = agent_read;
 564                 tmp->pvt->indicate = agent_indicate;
 565                 tmp->pvt->fixup = agent_fixup;
 566                 p->owner = tmp;
 567                 ast_mutex_lock(&usecnt_lock);
 568                 usecnt++;
 569                 ast_mutex_unlock(&usecnt_lock);
 570                 ast_update_use_count();
 571                 tmp->priority = 1;
 572                 /* Wake up and wait for other applications (by definition the login app)
 573                  * to release this channel). Takes ownership of the agent channel
 574                  * to this thread only.
 575                  * For signalling the other thread, ast_queue_frame is used until we
 576                  * can safely use signals for this purpose. The pselect() needs to be
 577                  * implemented in the kernel for this.
 578                  */
 579                 p->app_sleep_cond = 0;
 580                 if( ast_mutex_trylock(&p->app_lock) )
 581                 {
 582                         if (p->chan) {
 583                                 ast_queue_frame(p->chan, &null_frame, 1);
 584                                 ast_mutex_unlock(&p->lock);     /* For other thread to read the condition. */
 585                                 ast_mutex_lock(&p->app_lock);
 586                                 ast_mutex_lock(&p->lock);
 587                         }
 588                         if( !p->chan )
 589                         {
 590                                 ast_log(LOG_WARNING, "Agent disconnected while we were connecting the call\n");
 591                                 p->owner = NULL;
 592                                 tmp->pvt->pvt = NULL;
 593                                 p->app_sleep_cond = 1;
 594                                 ast_channel_free( tmp );
 595                                 ast_mutex_unlock(&p->lock);     /* For other thread to read the condition. */
 596                                 ast_mutex_unlock(&p->app_lock);
 597                                 return NULL;
 598                         }
 599                 }
 600                 p->owning_app = pthread_self();
 601                 /* After the above step, there should not be any blockers. */
 602                 if (p->chan) {
 603                         if (p->chan->blocking) {
 604                                 ast_log( LOG_ERROR, "A blocker exists after agent channel ownership acquired\n" );
 605                                 CRASH;
 606                         }
 607                         ast_moh_stop(p->chan);
 608                 }
 609         } else
 610                 ast_log(LOG_WARNING, "Unable to allocate channel structure\n");
 611         return tmp;
 612 }
 613
 614
 615 static int read_agent_config(void)
 616 {
 617         struct ast_config *cfg;
 618         struct ast_variable *v;
 619         struct agent_pvt *p, *pl, *pn;
 620         group = 0;
 621         autologoff = 0;
 622         wrapuptime = 0;
 623         ackcall = 1;
 624         cfg = ast_load(config);
 625         if (!cfg) {
 626                 ast_log(LOG_NOTICE, "No agent configuration found -- agent support disabled\n");
 627                 return 0;
 628         }
 629         ast_mutex_lock(&agentlock);
 630         p = agents;
 631         while(p) {
 632                 p->dead = 1;
 633                 p = p->next;
 634         }
 635         strcpy(moh, "default");
 636         v = ast_variable_browse(cfg, "agents");
 637         while(v) {
 638                 /* Create the interface list */
 639                 if (!strcasecmp(v->name, "agent")) {
 640                         add_agent(v->value, 0);
 641                 } else if (!strcasecmp(v->name, "group")) {
 642                         group = ast_get_group(v->value);
 643                 } else if (!strcasecmp(v->name, "autologoff")) {
 644                         autologoff = atoi(v->value);
 645                         if (autologoff < 0)
 646                                 autologoff = 0;
 647                 } else if (!strcasecmp(v->name, "ackcall")) {
 648                         ackcall = ast_true(v->value);
 649                 } else if (!strcasecmp(v->name, "wrapuptime")) {
 650                         wrapuptime = atoi(v->value);
 651                         if (wrapuptime < 0)
 652                                 wrapuptime = 0;
 653                 } else if (!strcasecmp(v->name, "musiconhold")) {
 654                         strncpy(moh, v->value, sizeof(moh) - 1);
 655                 }
 656                 v = v->next;
 657         }
 658         p = agents;
 659         pl = NULL;
 660         while(p) {
 661                 pn = p->next;
 662                 if (p->dead) {
 663                         /* Unlink */
 664                         if (pl)
 665                                 pl->next = p->next;
 666                         else
 667                                 agents = p->next;
 668                         /* Destroy if  appropriate */
 669                         if (!p->owner) {
 670                                 if (!p->chan) {
 671                                         free(p);
 672                                 } else {
 673                                         /* Cause them to hang up */
 674                                         ast_softhangup(p->chan, AST_SOFTHANGUP_EXPLICIT);
 675                                 }
 676                         }
 677                 } else
 678                         pl = p;
 679                 p = pn;
 680         }
 681         ast_mutex_unlock(&agentlock);
 682         ast_destroy(cfg);
 683         return 0;
 684 }
 685
 686 static int check_availability(struct agent_pvt *newlyavailable, int needlock)
 687 {
 688         struct ast_channel *chan=NULL, *parent=NULL;
 689         struct agent_pvt *p;
 690         int res;
 691         ast_log(LOG_DEBUG, "Checking availability of '%s'\n", newlyavailable->agent);
 692         if (needlock)
 693                 ast_mutex_lock(&agentlock);
 694         p = agents;
 695         while(p) {
 696                 if (p == newlyavailable) {
 697                         p = p->next;
 698                         continue;
 699                 }
 700                 ast_mutex_lock(&p->lock);
 701                 if (!p->abouttograb && p->pending && ((p->group && (newlyavailable->group & p->group)) || !strcmp(p->agent, newlyavailable->agent))) {
 702                         ast_log(LOG_DEBUG, "Call '%s' looks like a winner for agent '%s'\n", p->owner->name, newlyavailable->agent);
 703                         /* We found a pending call, time to merge */
 704                         chan = agent_new(newlyavailable, AST_STATE_DOWN);
 705                         parent = p->owner;
 706                         p->abouttograb = 1;
 707                         ast_mutex_unlock(&p->lock);
 708                         break;
 709                 }
 710                 ast_mutex_unlock(&p->lock);
 711                 p = p->next;
 712         }
 713         if (needlock)
 714                 ast_mutex_unlock(&agentlock);
 715         if (parent && chan)  {
 716                 ast_log( LOG_DEBUG, "Playing beep, lang '%s'\n", newlyavailable->chan->language);
 717                 res = ast_streamfile(newlyavailable->chan, "beep", newlyavailable->chan->language);
 718                 ast_log( LOG_DEBUG, "Played beep, result '%d'\n", res);
 719                 if (!res) {
 720                         res = ast_waitstream(newlyavailable->chan, "");
 721                         ast_log( LOG_DEBUG, "Waited for stream, result '%d'\n", res);
 722                 }
 723                 if (!res) {
 724                         /* Note -- parent may have disappeared */
 725                         if (p->abouttograb) {
 726                                 ast_setstate(parent, AST_STATE_UP);
 727                                 ast_setstate(chan, AST_STATE_UP);
 728                                 /* Go ahead and mark the channel as a zombie so that masquerade will
 729                                    destroy it for us, and we need not call ast_hangup */
 730                                 ast_mutex_lock(&parent->lock);
 731                                 chan->zombie = 1;
 732                                 ast_channel_masquerade(parent, chan);
 733                                 ast_mutex_unlock(&parent->lock);
 734                                 p->abouttograb = 0;
 735                         } else {
 736                                 ast_log(LOG_DEBUG, "Sneaky, parent disappeared in the mean time...\n");
 737                                 agent_cleanup(newlyavailable);
 738                         }
 739                 } else {
 740                         ast_log(LOG_DEBUG, "Ugh...  Agent hung up at exactly the wrong time\n");
 741                         agent_cleanup(newlyavailable);
 742                 }
 743         }
 744         return 0;
 745 }
 746
 747 static struct ast_channel *agent_request(char *type, int format, void *data)
 748 {
 749         struct agent_pvt *p;
 750         struct ast_channel *chan = NULL;
 751         char *s;
 752         unsigned int groupmatch;
 753         int waitforagent=0;
 754         int hasagent = 0;
 755         s = data;
 756         if ((s[0] == '@') && (sscanf(s + 1, "%d", &groupmatch) == 1)) {
 757                 groupmatch = (1 << groupmatch);
 758         } else if ((s[0] == ':') && (sscanf(s + 1, "%d", &groupmatch) == 1)) {
 759                 groupmatch = (1 << groupmatch);
 760                 waitforagent = 1;
 761         } else {
 762                 groupmatch = 0;
 763         }
 764
 765         /* Check actual logged in agents first */
 766         ast_mutex_lock(&agentlock);
 767         p = agents;
 768         while(p) {
 769                 ast_mutex_lock(&p->lock);
 770                 if (!p->pending && ((groupmatch && (p->group & groupmatch)) || !strcmp(data, p->agent)) &&
 771                                 !strlen(p->loginchan)) {
 772                         if (p->chan)
 773                                 hasagent++;
 774                         if (!p->lastdisc.tv_sec) {
 775                                 /* Agent must be registered, but not have any active call, and not be in a waiting state */
 776                                 if (!p->owner && p->chan) {
 777                                         /* Fixed agent */
 778                                         chan = agent_new(p, AST_STATE_DOWN);
 779                                 }
 780                                 if (chan) {
 781                                         ast_mutex_unlock(&p->lock);
 782                                         break;
 783                                 }
 784                         }
 785                 }
 786                 ast_mutex_unlock(&p->lock);
 787                 p = p->next;
 788         }
 789         if (!p) {
 790                 p = agents;
 791                 while(p) {
 792                         ast_mutex_lock(&p->lock);
 793                         if (!p->pending && ((groupmatch && (p->group & groupmatch)) || !strcmp(data, p->agent))) {
 794                                 if (p->chan || strlen(p->loginchan))
 795                                         hasagent++;
 796                                 if (!p->lastdisc.tv_sec) {
 797                                         /* Agent must be registered, but not have any active call, and not be in a waiting state */
 798                                         if (!p->owner && p->chan) {
 799                                                 /* Could still get a fixed agent */
 800                                                 chan = agent_new(p, AST_STATE_DOWN);
 801                                         } else if (!p->owner && strlen(p->loginchan)) {
 802                                                 /* Adjustable agent */
 803                                                 p->chan = ast_request("Local", format, p->loginchan);
 804                                                 if (p->chan)
 805                                                         chan = agent_new(p, AST_STATE_DOWN);
 806                                         }
 807                                         if (chan) {
 808                                                 ast_mutex_unlock(&p->lock);
 809                                                 break;
 810                                         }
 811                                 }
 812                         }
 813                         ast_mutex_unlock(&p->lock);
 814                         p = p->next;
 815                 }
 816         }
 817
 818         if (!chan && waitforagent) {
 819                 /* No agent available -- but we're requesting to wait for one.
 820                    Allocate a place holder */
 821                 if (hasagent) {
 822                         ast_log(LOG_DEBUG, "Creating place holder for '%s'\n", s);
 823                         p = add_agent(data, 1);
 824                         p->group = groupmatch;
 825                         chan = agent_new(p, AST_STATE_DOWN);
 826                         if (!chan) {
 827                                 ast_log(LOG_WARNING, "Weird...  Fix this to drop the unused pending agent\n");
 828                         }
 829                 } else
 830                         ast_log(LOG_DEBUG, "Not creating place holder for '%s' since nobody logged in\n", s);
 831         }
 832         ast_mutex_unlock(&agentlock);
 833         return chan;
 834 }
 835
 836 static int powerof(unsigned int v)
 837 {
 838         int x;
 839         for (x=0;x<32;x++) {
 840                 if (v & (1 << x)) return x;
 841         }
 842         return 0;
 843 }
 844
 845 static int agents_show(int fd, int argc, char **argv)
 846 {
 847         struct agent_pvt *p;
 848         char username[256];
 849         char location[256];
 850         char talkingto[256];
 851         char moh[256];
 852
 853         if (argc != 2)
 854                 return RESULT_SHOWUSAGE;
 855         ast_mutex_lock(&agentlock);
 856         p = agents;
 857         while(p) {
 858                 ast_mutex_lock(&p->lock);
 859                 if (p->pending) {
 860                         if (p->group)
 861                                 ast_cli(fd, "-- Pending call to group %d\n", powerof(p->group));
 862                         else
 863                                 ast_cli(fd, "-- Pending call to agent %s\n", p->agent);
 864                 } else {
 865                         if (strlen(p->name))
 866                                 snprintf(username, sizeof(username), "(%s) ", p->name);
 867                         else
 868                                 strcpy(username, "");
 869                         if (p->chan) {
 870                                 snprintf(location, sizeof(location), "logged in on %s", p->chan->name);
 871                                 if (p->owner && p->owner->bridge) {
 872                                         snprintf(talkingto, sizeof(talkingto), " talking to %s", p->owner->bridge->name);
 873                                 } else {
 874                                         strcpy(talkingto, " is idle");
 875                                 }
 876                         } else if (strlen(p->loginchan)) {
 877                                 snprintf(location, sizeof(location) - 20, "available at '%s'", p->loginchan);
 878                                 strcpy(talkingto, "");
 879                                 if (p->acknowledged)
 880                                         strcat(location, " (Confirmed)");
 881                         } else {
 882                                 strcpy(location, "not logged in");
 883                                 strcpy(talkingto, "");
 884                         }
 885                         if (strlen(p->moh))
 886                                 snprintf(moh, sizeof(moh), " (musiconhold is '%s')", p->moh);
 887                         ast_cli(fd, "%-12.12s %s%s%s%s\n", p->agent,
 888                                         username, location, talkingto, moh);
 889                 }
 890                 ast_mutex_unlock(&p->lock);
 891                 p = p->next;
 892         }
 893         ast_mutex_unlock(&agentlock);
 894         return RESULT_SUCCESS;
 895 }
 896
 897 static char show_agents_usage[] =
 898 "Usage: show agents\n"
 899 "       Provides summary information on agents.\n";
 900
 901 static struct ast_cli_entry cli_show_agents = {
 902         { "show", "agents", NULL }, agents_show,
 903         "Show status of agents", show_agents_usage, NULL };
 904
 905 STANDARD_LOCAL_USER;
 906 LOCAL_USER_DECL;
 907
 908 static int __login_exec(struct ast_channel *chan, void *data, int callbackmode)
 909 {
 910         int res=0;
 911         int tries = 0;
 912         struct agent_pvt *p;
 913         struct localuser *u;
 914         struct timeval tv;
 915         char user[AST_MAX_AGENT];
 916         char pass[AST_MAX_AGENT];
 917         char xpass[AST_MAX_AGENT] = "";
 918         char *errmsg;
 919         char info[512];
 920         char *opt_user = NULL;
 921         char *options = NULL;
 922         char *context = NULL;
 923         char *exten = NULL;
 924         int play_announcement;
 925         char *filename = "agent-loginok";
 926
 927         LOCAL_USER_ADD(u);
 928
 929         /* Parse the arguments XXX Check for failure XXX */
 930         strncpy(info, (char *)data, strlen((char *)data) + AST_MAX_EXTENSION-1);
 931         opt_user = info;
 932         if( opt_user ) {
 933                 options = strchr(opt_user, '|');
 934                 if (options) {
 935                         *options = '\0';
 936                         options++;
 937                         if (callbackmode) {
 938                                 context = strchr(options, '@');
 939                                 if (context) {
 940                                         *context = '\0';
 941                                         context++;
 942                                 }
 943                                 exten = options;
 944                                 while(*exten && ((*exten < '0') || (*exten > '9'))) exten++;
 945                                 if (!*exten)
 946                                         exten = NULL;
 947                         }
 948                 }
 949         }
 950
 951         if (chan->_state != AST_STATE_UP)
 952                 res = ast_answer(chan);
 953         if (!res) {
 954                 if( opt_user && strlen(opt_user))
 955                         strncpy( user, opt_user, AST_MAX_AGENT );
 956                 else
 957                         res = ast_app_getdata(chan, "agent-user", user, sizeof(user) - 1, 0);
 958         }
 959         while (!res && (tries < 3)) {
 960                 /* Check for password */
 961                 ast_mutex_lock(&agentlock);
 962                 p = agents;
 963                 while(p) {
 964                         if (!strcmp(p->agent, user) && !p->pending)
 965                                 strncpy(xpass, p->password, sizeof(xpass) - 1);
 966                         p = p->next;
 967                 }
 968                 ast_mutex_unlock(&agentlock);
 969                 if (!res) {
 970                         if (strlen(xpass))
 971                                 res = ast_app_getdata(chan, "agent-pass", pass, sizeof(pass) - 1, 0);
 972                         else
 973                                 strcpy(pass, "");
 974                 }
 975                 errmsg = "agent-incorrect";
 976
 977 #if 0
 978                 ast_log(LOG_NOTICE, "user: %s, pass: %s\n", user, pass);
 979 #endif
 980
 981                 /* Check again for accuracy */
 982                 ast_mutex_lock(&agentlock);
 983                 p = agents;
 984                 while(p) {
 985                         ast_mutex_lock(&p->lock);
 986                         if (!strcmp(p->agent, user) &&
 987                                 !strcmp(p->password, pass) && !p->pending) {
 988                                         if (!p->chan) {
 989                                                 if (callbackmode) {
 990                                                         char tmpchan[256] = "";
 991                                                         int pos = 0;
 992                                                         /* Retrieve login chan */
 993                                                         for (;;) {
 994                                                                 if (exten) {
 995                                                                         strncpy(tmpchan, exten, sizeof(tmpchan) - 1);
 996                                                                         res = 0;
 997                                                                 } else
 998                                                                         res = ast_app_getdata(chan, "agent-newlocation", tmpchan+pos, sizeof(tmpchan) - 2, 0);
 999                                                                 if (!strlen(tmpchan) || ast_exists_extension(chan, context && strlen(context) ? context : "default", tmpchan,
1000                                                                                         1, NULL))
1001                                                                         break;
1002                                                                 if (exten) {
1003                                                                         ast_log(LOG_WARNING, "Extension '%s' is not valid for automatic login of agent '%s'\n", exten, p->agent);
1004                                                                         exten = NULL;
1005                                                                         pos = 0;
1006                                                                 } else {
1007                                                                         res = ast_streamfile(chan, "invalid", chan->language);
1008                                                                         if (!res)
1009                                                                                 res = ast_waitstream(chan, AST_DIGIT_ANY);
1010                                                                         if (res > 0) {
1011                                                                                 tmpchan[0] = res;
1012                                                                                 tmpchan[1] = '\0';
1013                                                                                 pos = 1;
1014                                                                         } else {
1015                                                                                 tmpchan[0] = '\0';
1016                                                                                 pos = 0;
1017                                                                         }
1018                                                                 }
1019                                                         }
1020                                                         if (!res) {
1021                                                                 if (context && strlen(context) && strlen(tmpchan))
1022                                                                         snprintf(p->loginchan, sizeof(p->loginchan), "%s@%s", tmpchan, context);
1023                                                                 else
1024                                                                         strncpy(p->loginchan, tmpchan, sizeof(p->loginchan) - 1);
1025                                                                 if (!strlen(p->loginchan))
1026                                                                         filename = "agent-loggedoff";
1027                                                                 p->acknowledged = 0;
1028                                                         }
1029                                                 } else {
1030                                                         strcpy(p->loginchan, "");
1031                                                         p->acknowledged = 0;
1032                                                 }
1033                                                 play_announcement = 1;
1034                                                 if( options )
1035                                                         if( strchr( options, 's' ) )
1036                                                                 play_announcement = 0;
1037                                                 if( !res && play_announcement )
1038                                                         res = ast_streamfile(chan, filename, chan->language);
1039                                                 if (!res)
1040                                                         ast_waitstream(chan, "");
1041                                                 if (!res) {
1042                                                         res = ast_set_read_format(chan, ast_best_codec(chan->nativeformats));
1043                                                         if (res)
1044                                                                 ast_log(LOG_WARNING, "Unable to set read format to %d\n", ast_best_codec(chan->nativeformats));
1045                                                 }
1046                                                 if (!res) {
1047                                                         ast_set_write_format(chan, ast_best_codec(chan->nativeformats));
1048                                                         if (res)
1049                                                                 ast_log(LOG_WARNING, "Unable to set write format to %d\n", ast_best_codec(chan->nativeformats));
1050                                                 }
1051                                                 /* Check once more just in case */
1052                                                 if (p->chan)
1053                                                         res = -1;
1054                                                 if (callbackmode && !res) {
1055                                                         /* Just say goodbye and be done with it */
1056                                                         if (!res)
1057                                                                 res = ast_safe_sleep(chan, 500);
1058                                                         res = ast_streamfile(chan, "vm-goodbye", chan->language);
1059                                                         if (!res)
1060                                                                 res = ast_waitstream(chan, "");
1061                                                         if (!res)
1062                                                                 res = ast_safe_sleep(chan, 1000);
1063                                                         ast_mutex_unlock(&p->lock);
1064                                                         ast_mutex_unlock(&agentlock);
1065                                                 } else if (!res) {
1066 #ifdef HONOR_MUSIC_CLASS
1067                                                         /* check if the moh class was changed with setmusiconhold */
1068                                                         if (*(chan->musicclass))
1069                                                                 strncpy(p->moh, chan->musicclass, sizeof(p->moh) - 1);
1070 #endif
1071                                                         ast_moh_start(chan, p->moh);
1072                                                         manager_event(EVENT_FLAG_AGENT, "Agentlogin",
1073                                                                 "Agent: %s\r\n"
1074                                                                 "Channel: %s\r\n",
1075                                                                 p->agent, chan->name);
1076                                                         if (option_verbose > 2)
1077                                                                 ast_verbose(VERBOSE_PREFIX_3 "Agent '%s' logged in (format %s/%s)\n", p->agent,
1078                                                                                                 ast_getformatname(chan->readformat), ast_getformatname(chan->writeformat));
1079                                                         /* Login this channel and wait for it to
1080                                                            go away */
1081                                                         p->chan = chan;
1082                                                         p->acknowledged = 1;
1083                                                         check_availability(p, 0);
1084                                                         ast_mutex_unlock(&p->lock);
1085                                                         ast_mutex_unlock(&agentlock);
1086                                                         while (res >= 0) {
1087                                                                 ast_mutex_lock(&p->lock);
1088                                                                 if (p->chan != chan)
1089                                                                         res = -1;
1090                                                                 ast_mutex_unlock(&p->lock);
1091                                                                 /* Yield here so other interested threads can kick in. */
1092                                                                 sched_yield();
1093                                                                 if (res)
1094                                                                         break;
1095
1096                                                                 ast_mutex_lock(&p->lock);
1097                                                                 if (p->lastdisc.tv_sec) {
1098                                                                         gettimeofday(&tv, NULL);
1099                                                                         if ((tv.tv_sec - p->lastdisc.tv_sec) * 1000 +
1100                                                                                 (tv.tv_usec - p->lastdisc.tv_usec) / 1000 > p->wrapuptime) {
1101                                                                                         ast_log(LOG_DEBUG, "Wrapup time expired!\n");
1102                                                                                 memset(&p->lastdisc, 0, sizeof(p->lastdisc));
1103                                                                                 check_availability(p, 1);
1104                                                                         }
1105                                                                 }
1106                                                                 ast_mutex_unlock(&p->lock);
1107                                                                 /*      Synchronize channel ownership between call to agent and itself. */
1108                                                                 ast_mutex_lock( &p->app_lock );
1109                                                                 ast_mutex_lock(&p->lock);
1110                                                                 p->owning_app = pthread_self();
1111                                                                 ast_mutex_unlock(&p->lock);
1112                                                                 res = ast_safe_sleep_conditional( chan, 1000,
1113                                                                                                                 agent_cont_sleep, p );
1114                                                                 ast_mutex_unlock( &p->app_lock );
1115                                                                 sched_yield();
1116                                                         }
1117                                                         ast_mutex_lock(&p->lock);
1118                                                         if (res && p->owner)
1119                                                                 ast_log(LOG_WARNING, "Huh?  We broke out when there was still an owner?\n");
1120                                                         /* Log us off if appropriate */
1121                                                         if (p->chan == chan)
1122                                                                 p->chan = NULL;
1123                                                         p->acknowledged = 0;
1124                                                         ast_mutex_unlock(&p->lock);
1125                                                         if (option_verbose > 2)
1126                                                                 ast_verbose(VERBOSE_PREFIX_3 "Agent '%s' logged out\n", p->agent);
1127                                                         manager_event(EVENT_FLAG_AGENT, "Agentlogoff",
1128                                                                 "Agent: %s\r\n",
1129                                                                 p->agent);
1130                                                         /* If there is no owner, go ahead and kill it now */
1131                                                         if (p->dead && !p->owner)
1132                                                                 free(p);
1133                                                 }
1134                                                 else {
1135                                                         ast_mutex_unlock(&p->lock);
1136                                                         p = NULL;
1137                                                 }
1138                                                 res = -1;
1139                                         } else {
1140                                                 ast_mutex_unlock(&p->lock);
1141                                                 errmsg = "agent-alreadyon";
1142                                                 p = NULL;
1143                                         }
1144                                         break;
1145                         }
1146                         ast_mutex_unlock(&p->lock);
1147                         p = p->next;
1148                 }
1149                 if (!p)
1150                         ast_mutex_unlock(&agentlock);
1151
1152                 if (!res)
1153                         res = ast_app_getdata(chan, errmsg, user, sizeof(user) - 1, 0);
1154         }
1155
1156         LOCAL_USER_REMOVE(u);
1157         /* Always hangup */
1158         return -1;
1159 }
1160
1161 static int login_exec(struct ast_channel *chan, void *data)
1162 {
1163         return __login_exec(chan, data, 0);
1164 }
1165
1166 static int callback_exec(struct ast_channel *chan, void *data)
1167 {
1168         return __login_exec(chan, data, 1);
1169 }
1170
1171 int load_module()
1172 {
1173         /* Make sure we can register our sip channel type */
1174         if (ast_channel_register(type, tdesc, capability, agent_request)) {
1175                 ast_log(LOG_ERROR, "Unable to register channel class %s\n", type);
1176                 return -1;
1177         }
1178         ast_register_application(app, login_exec, synopsis, descrip);
1179         ast_register_application(app2, callback_exec, synopsis2, descrip2);
1180         ast_cli_register(&cli_show_agents);
1181         /* Read in the config */
1182         read_agent_config();
1183         return 0;
1184 }
1185
1186 int reload()
1187 {
1188         read_agent_config();
1189         return 0;
1190 }
1191
1192 int unload_module()
1193 {
1194         struct agent_pvt *p;
1195         /* First, take us out of the channel loop */
1196         ast_cli_unregister(&cli_show_agents);
1197         ast_unregister_application(app);
1198         ast_unregister_application(app2);
1199         ast_channel_unregister(type);
1200         if (!ast_mutex_lock(&agentlock)) {
1201                 /* Hangup all interfaces if they have an owner */
1202                 p = agents;
1203                 while(p) {
1204                         if (p->owner)
1205                                 ast_softhangup(p->owner, AST_SOFTHANGUP_APPUNLOAD);
1206                         p = p->next;
1207                 }
1208                 agents = NULL;
1209                 ast_mutex_unlock(&agentlock);
1210         } else {
1211                 ast_log(LOG_WARNING, "Unable to lock the monitor\n");
1212                 return -1;
1213         }
1214         return 0;
1215 }
1216
1217 int usecount()
1218 {
1219         int res;
1220         ast_mutex_lock(&usecnt_lock);
1221         res = usecnt;
1222         ast_mutex_unlock(&usecnt_lock);
1223         return res;
1224 }
1225
1226 char *key()
1227 {
1228         return ASTERISK_GPL_KEY;
1229 }
1230
1231 char *description()
1232 {
1233         return desc;
1234 }
1235