manager.c

   1 /*
   2  * Asterisk -- A telephony toolkit for Linux.
   3  *
   4  * Channel Management and more
   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 <stdlib.h>
  16 #include <pthread.h>
  17 #include <string.h>
  18 #include <sys/time.h>
  19 #include <sys/types.h>
  20 #include <netdb.h>
  21 #include <sys/socket.h>
  22 #include <netinet/in.h>
  23 #include <netinet/tcp.h>
  24 #include <arpa/inet.h>
  25 #include <signal.h>
  26 #include <errno.h>
  27 #include <unistd.h>
  28 #include <asterisk/channel.h>
  29 #include <asterisk/file.h>
  30 #include <asterisk/manager.h>
  31 #include <asterisk/config.h>
  32 #include <asterisk/lock.h>
  33 #include <asterisk/logger.h>
  34 #include <asterisk/options.h>
  35 #include <asterisk/cli.h>
  36 #include <asterisk/app.h>
  37 #include <asterisk/pbx.h>
  38 #include <asterisk/md5.h>
  39 #include <asterisk/acl.h>
  40
  41 static int enabled = 0;
  42 static int portno = DEFAULT_MANAGER_PORT;
  43 static int asock = -1;
  44 static pthread_t t;
  45 static ast_mutex_t sessionlock = AST_MUTEX_INITIALIZER;
  46
  47 static struct permalias {
  48         int num;
  49         char *label;
  50 } perms[] = {
  51         { EVENT_FLAG_SYSTEM, "system" },
  52         { EVENT_FLAG_CALL, "call" },
  53         { EVENT_FLAG_LOG, "log" },
  54         { EVENT_FLAG_VERBOSE, "verbose" },
  55         { EVENT_FLAG_COMMAND, "command" },
  56         { EVENT_FLAG_AGENT, "agent" },
  57         { EVENT_FLAG_USER, "user" },
  58         { -1, "all" },
  59 };
  60
  61 static struct mansession *sessions = NULL;
  62 static struct manager_action *first_action = NULL;
  63 static ast_mutex_t actionlock = AST_MUTEX_INITIALIZER;
  64
  65 static int handle_showmancmds(int fd, int argc, char *argv[])
  66 {
  67         struct manager_action *cur = first_action;
  68         char *format = "  %-15.15s  %-45.45s\n";
  69
  70         ast_mutex_lock(&actionlock);
  71         ast_cli(fd, format, "Action", "Synopsis");
  72         while(cur) { /* Walk the list of actions */
  73                 ast_cli(fd, format, cur->action, cur->synopsis);
  74                 cur = cur->next;
  75         }
  76
  77         ast_mutex_unlock(&actionlock);
  78         return RESULT_SUCCESS;
  79 }
  80
  81 static int handle_showmanconn(int fd, int argc, char *argv[])
  82 {
  83         struct mansession *s;
  84         char *format = "  %-15.15s  %-15.15s\n";
  85         ast_mutex_lock(&sessionlock);
  86         s = sessions;
  87         ast_cli(fd, format, "Username", "IP Address");
  88         while(s) {
  89                 ast_cli(fd, format,s->username, inet_ntoa(s->sin.sin_addr));
  90                 s = s->next;
  91         }
  92
  93         ast_mutex_unlock(&sessionlock);
  94         return RESULT_SUCCESS;
  95 }
  96
  97 static char showmancmds_help[] =
  98 "Usage: show manager commands\n"
  99 "       Prints a listing of all the available manager commands.\n";
 100
 101 static char showmanconn_help[] =
 102 "Usage: show manager connected\n"
 103 "       Prints a listing of the users that are connected to the\n"
 104 "manager interface.\n";
 105
 106 static struct ast_cli_entry show_mancmds_cli =
 107         { { "show", "manager", "commands", NULL },
 108         handle_showmancmds, "Show manager commands", showmancmds_help };
 109
 110 static struct ast_cli_entry show_manconn_cli =
 111         { { "show", "manager", "connected", NULL },
 112         handle_showmanconn, "Show connected manager users", showmanconn_help };
 113
 114 static void destroy_session(struct mansession *s)
 115 {
 116         struct mansession *cur, *prev = NULL;
 117         ast_mutex_lock(&sessionlock);
 118         cur = sessions;
 119         while(cur) {
 120                 if (cur == s)
 121                         break;
 122                 prev = cur;
 123                 cur = cur->next;
 124         }
 125         if (cur) {
 126                 if (prev)
 127                         prev->next = cur->next;
 128                 else
 129                         sessions = cur->next;
 130                 if (s->fd > -1)
 131                         close(s->fd);
 132                 free(s);
 133         } else
 134                 ast_log(LOG_WARNING, "Trying to delete non-existant session %p?\n", s);
 135         ast_mutex_unlock(&sessionlock);
 136
 137 }
 138
 139 char *astman_get_header(struct message *m, char *var)
 140 {
 141         char cmp[80];
 142         int x;
 143         snprintf(cmp, sizeof(cmp), "%s: ", var);
 144         for (x=0;x<m->hdrcount;x++)
 145                 if (!strncasecmp(cmp, m->headers[x], strlen(cmp)))
 146                         return m->headers[x] + strlen(cmp);
 147         return "";
 148 }
 149
 150 void astman_send_error(struct mansession *s, struct message *m, char *error)
 151 {
 152         char *id = astman_get_header(m,"ActionID");
 153         ast_mutex_lock(&s->lock);
 154         ast_cli(s->fd, "Response: Error\r\n");
 155         if (id && strlen(id))
 156                 ast_cli(s->fd, "ActionID: %s\r\n",id);
 157         ast_cli(s->fd, "Message: %s\r\n\r\n", error);
 158         ast_mutex_unlock(&s->lock);
 159 }
 160
 161 void astman_send_response(struct mansession *s, struct message *m, char *resp, char *msg)
 162 {
 163         char *id = astman_get_header(m,"ActionID");
 164         ast_mutex_lock(&s->lock);
 165         ast_cli(s->fd, "Response: %s\r\n", resp);
 166         if (id && strlen(id))
 167                 ast_cli(s->fd, "ActionID: %s\r\n",id);
 168         if (msg)
 169                 ast_cli(s->fd, "Message: %s\r\n\r\n", msg);
 170         else
 171                 ast_cli(s->fd, "\r\n");
 172         ast_mutex_unlock(&s->lock);
 173 }
 174
 175 void astman_send_ack(struct mansession *s, struct message *m, char *msg)
 176 {
 177         astman_send_response(s, m, "Success", msg);
 178 }
 179
 180 static int get_perm(char *instr)
 181 {
 182         char tmp[256];
 183         char *c;
 184         int x;
 185         int ret = 0;
 186         char *stringp=NULL;
 187         if (!instr)
 188                 return 0;
 189         strncpy(tmp, instr, sizeof(tmp) - 1);
 190         stringp=tmp;
 191         c = strsep(&stringp, ",");
 192         while(c) {
 193                 for (x=0;x<sizeof(perms) / sizeof(perms[0]);x++) {
 194                         if (!strcasecmp(perms[x].label, c))
 195                                 ret |= perms[x].num;
 196                 }
 197                 c = strsep(&stringp, ",");
 198         }
 199         return ret;
 200 }
 201
 202 static int authenticate(struct mansession *s, struct message *m)
 203 {
 204         struct ast_config *cfg;
 205         char *cat;
 206         char *user = astman_get_header(m, "Username");
 207         char *pass = astman_get_header(m, "Secret");
 208         char *authtype = astman_get_header(m, "AuthType");
 209         char *key = astman_get_header(m, "Key");
 210
 211         cfg = ast_load("manager.conf");
 212         if (!cfg)
 213                 return -1;
 214         cat = ast_category_browse(cfg, NULL);
 215         while(cat) {
 216                 if (strcasecmp(cat, "general")) {
 217                         /* This is a user */
 218                         if (!strcasecmp(cat, user)) {
 219                                 struct ast_variable *v;
 220                                 struct ast_ha *ha = NULL;
 221                                 char *password = NULL;
 222                                 v = ast_variable_browse(cfg, cat);
 223                                 while (v) {
 224                                         if (!strcasecmp(v->name, "secret")) {
 225                                                 password = v->value;
 226                                         } else if (!strcasecmp(v->name, "permit") ||
 227                                                    !strcasecmp(v->name, "deny")) {
 228                                                         ha = ast_append_ha(v->name, v->value, ha);
 229                                         }
 230                                         v = v->next;
 231                                 }
 232                                 if (ha && !ast_apply_ha(ha, &(s->sin))) {
 233                                         ast_log(LOG_NOTICE, "%s failed to pass IP ACL as '%s'\n", inet_ntoa(s->sin.sin_addr), user);
 234                                         ast_free_ha(ha);
 235                                         ast_destroy(cfg);
 236                                         return -1;
 237                                 } else if (ha)
 238                                         ast_free_ha(ha);
 239                                 if (!strcasecmp(authtype, "MD5")) {
 240                                         if (key && strlen(key) && s->challenge) {
 241                                                 int x;
 242                                                 int len=0;
 243                                                 char md5key[256] = "";
 244                                                 struct MD5Context md5;
 245                                                 unsigned char digest[16];
 246                                                 MD5Init(&md5);
 247                                                 MD5Update(&md5, s->challenge, strlen(s->challenge));
 248                                                 MD5Update(&md5, password, strlen(password));
 249                                                 MD5Final(digest, &md5);
 250                                                 for (x=0;x<16;x++)
 251                                                         len += sprintf(md5key + len, "%2.2x", digest[x]);
 252                                                 if (!strcmp(md5key, key))
 253                                                         break;
 254                                                 else {
 255                                                         ast_destroy(cfg);
 256                                                         return -1;
 257                                                 }
 258                                         }
 259                                 } else if (password && !strcasecmp(password, pass)) {
 260                                         break;
 261                                 } else {
 262                                         ast_log(LOG_NOTICE, "%s failed to authenticate as '%s'\n", inet_ntoa(s->sin.sin_addr), user);
 263                                         ast_destroy(cfg);
 264                                         return -1;
 265                                 }
 266                         }
 267                 }
 268                 cat = ast_category_browse(cfg, cat);
 269         }
 270         if (cat) {
 271                 strncpy(s->username, cat, sizeof(s->username) - 1);
 272                 s->readperm = get_perm(ast_variable_retrieve(cfg, cat, "read"));
 273                 s->writeperm = get_perm(ast_variable_retrieve(cfg, cat, "write"));
 274                 ast_destroy(cfg);
 275                 return 0;
 276         }
 277         ast_log(LOG_NOTICE, "%s tried to authenticate with non-existant user '%s'\n", inet_ntoa(s->sin.sin_addr), user);
 278         ast_destroy(cfg);
 279         return -1;
 280 }
 281
 282 static int action_ping(struct mansession *s, struct message *m)
 283 {
 284         astman_send_response(s, m, "Pong", NULL);
 285         return 0;
 286 }
 287
 288 static int action_logoff(struct mansession *s, struct message *m)
 289 {
 290         astman_send_response(s, m, "Goodbye", "Thanks for all the fish.");
 291         return -1;
 292 }
 293
 294 static int action_hangup(struct mansession *s, struct message *m)
 295 {
 296         struct ast_channel *c = NULL;
 297         char *name = astman_get_header(m, "Channel");
 298         if (!strlen(name)) {
 299                 astman_send_error(s, m, "No channel specified");
 300                 return 0;
 301         }
 302         c = ast_channel_walk(NULL);
 303         while(c) {
 304                 if (!strcasecmp(c->name, name)) {
 305                         break;
 306                 }
 307                 c = ast_channel_walk(c);
 308         }
 309         if (!c) {
 310                 astman_send_error(s, m, "No such channel");
 311                 return 0;
 312         }
 313         ast_softhangup(c, AST_SOFTHANGUP_EXPLICIT);
 314         astman_send_ack(s, m, "Channel Hungup");
 315         return 0;
 316 }
 317
 318 static int action_status(struct mansession *s, struct message *m)
 319 {
 320         char *id = astman_get_header(m,"ActionID");
 321         char idText[256] = "";
 322         struct ast_channel *c;
 323         char bridge[256];
 324         astman_send_ack(s, m, "Channel status will follow");
 325         c = ast_channel_walk(NULL);
 326         if (id && strlen(id))
 327                 snprintf(idText,256,"ActionID: %s\r\n",id);
 328         while(c) {
 329                 if (c->bridge)
 330                         snprintf(bridge, sizeof(bridge), "Link: %s\r\n", c->bridge->name);
 331                 else
 332                         strcpy(bridge, "");
 333                 if (c->pbx) {
 334                         ast_cli(s->fd,
 335                         "Event: Status\r\n"
 336                         "Channel: %s\r\n"
 337                         "CallerID: %s\r\n"
 338                         "State: %s\r\n"
 339                         "Context: %s\r\n"
 340                         "Extension: %s\r\n"
 341                         "Priority: %d\r\n"
 342                         "%s"
 343                         "Uniqueid: %s\r\n"
 344                         "%s"
 345                         "\r\n",
 346                         c->name, c->callerid ? c->callerid : "<unknown>",
 347                         ast_state2str(c->_state), c->context,
 348                         c->exten, c->priority, bridge, c->uniqueid, idText);
 349                 } else {
 350                         ast_cli(s->fd,
 351                         "Event: Status\r\n"
 352                         "Channel: %s\r\n"
 353                         "CallerID: %s\r\n"
 354                         "State: %s\r\n"
 355                         "%s"
 356                         "Uniqueid: %s\r\n"
 357                         "%s"
 358                         "\r\n",
 359                         c->name, c->callerid ? c->callerid : "<unknown>",
 360                         ast_state2str(c->_state), bridge, c->uniqueid, idText);
 361                 }
 362                 c = ast_channel_walk(c);
 363         }
 364         ast_cli(s->fd,
 365         "Event: StatusComplete\r\n"
 366         "%s"
 367         "\r\n",idText);
 368         return 0;
 369 }
 370
 371 static int action_redirect(struct mansession *s, struct message *m)
 372 {
 373         char *name = astman_get_header(m, "Channel");
 374         char *name2 = astman_get_header(m, "ExtraChannel");
 375         char *exten = astman_get_header(m, "Exten");
 376         char *context = astman_get_header(m, "Context");
 377         char *priority = astman_get_header(m, "Priority");
 378         int pi = 0;
 379         int res;
 380         if (!name || !strlen(name)) {
 381                 astman_send_error(s, m, "Channel not specified");
 382                 return 0;
 383         }
 384         if (strlen(priority) && (sscanf(priority, "%d", &pi) != 1)) {
 385                 astman_send_error(s, m, "Invalid priority\n");
 386                 return 0;
 387         }
 388         res = ast_async_goto_by_name(name, context, exten, pi);
 389         if (!res) {
 390                 if (strlen(name2)) {
 391                         res = ast_async_goto_by_name(name2, context, exten, pi);
 392                         if (!res)
 393                                 astman_send_ack(s, m, "Dual Redirect successful");
 394                         else
 395                                 astman_send_error(s, m, "Secondary redirect failed");
 396                 } else
 397                         astman_send_ack(s, m, "Redirect successful");
 398         } else
 399                 astman_send_error(s, m, "Redirect failed");
 400         return 0;
 401 }
 402
 403 static int action_command(struct mansession *s, struct message *m)
 404 {
 405         char *cmd = astman_get_header(m, "Command");
 406         ast_mutex_lock(&s->lock);
 407         s->blocking = 1;
 408         ast_mutex_unlock(&s->lock);
 409         ast_cli(s->fd, "Response: Follows\r\n");
 410         /* FIXME: Wedge a ActionID response in here, waiting for later changes */
 411         ast_cli_command(s->fd, cmd);
 412         ast_cli(s->fd, "--END COMMAND--\r\n\r\n");
 413         ast_mutex_lock(&s->lock);
 414         s->blocking = 0;
 415         ast_mutex_unlock(&s->lock);
 416         return 0;
 417 }
 418
 419 static int action_originate(struct mansession *s, struct message *m)
 420 {
 421         char *name = astman_get_header(m, "Channel");
 422         char *exten = astman_get_header(m, "Exten");
 423         char *context = astman_get_header(m, "Context");
 424         char *priority = astman_get_header(m, "Priority");
 425         char *timeout = astman_get_header(m, "Timeout");
 426         char *callerid = astman_get_header(m, "CallerID");
 427         char *variable = astman_get_header(m, "Variable");
 428         char *account = astman_get_header(m, "Account");
 429         char *app = astman_get_header(m, "Application");
 430         char *appdata = astman_get_header(m, "Data");
 431         char *tech, *data;
 432         int pi = 0;
 433         int res;
 434         int to = 30000;
 435         int reason = 0;
 436         char tmp[256];
 437         if (!name) {
 438                 astman_send_error(s, m, "Channel not specified");
 439                 return 0;
 440         }
 441         if (strlen(priority) && (sscanf(priority, "%d", &pi) != 1)) {
 442                 astman_send_error(s, m, "Invalid priority\n");
 443                 return 0;
 444         }
 445         if (strlen(timeout) && (sscanf(timeout, "%d", &to) != 1)) {
 446                 astman_send_error(s, m, "Invalid timeout\n");
 447                 return 0;
 448         }
 449         strncpy(tmp, name, sizeof(tmp) - 1);
 450         tech = tmp;
 451         data = strchr(tmp, '/');
 452         if (!data) {
 453                 astman_send_error(s, m, "Invalid channel\n");
 454                 return 0;
 455         }
 456         *data = '\0';
 457         data++;
 458         if (strlen(app)) {
 459                 res = ast_pbx_outgoing_app(tech, AST_FORMAT_SLINEAR, data, to, app, appdata, &reason, 0, strlen(callerid) ? callerid : NULL, variable, account);
 460         } else {
 461                 res = ast_pbx_outgoing_exten(tech, AST_FORMAT_SLINEAR, data, to, context, exten, pi, &reason, 0, strlen(callerid) ? callerid : NULL, variable, account);
 462         }
 463         if (!res)
 464                 astman_send_ack(s, m, "Originate successfully queued");
 465         else
 466                 astman_send_error(s, m, "Originate failed");
 467         return 0;
 468 }
 469
 470 static int action_mailboxstatus(struct mansession *s, struct message *m)
 471 {
 472         char *mailbox = astman_get_header(m, "Mailbox");
 473         char *id = astman_get_header(m,"ActionID");
 474         char idText[256] = "";
 475         if (!mailbox || !strlen(mailbox)) {
 476                 astman_send_error(s, m, "Mailbox not specified");
 477                 return 0;
 478         }
 479         if (id && strlen(id))
 480                 snprintf(idText,256,"ActionID: %s\r\n",id);
 481         ast_cli(s->fd, "Response: Success\r\n"
 482                                    "%s"
 483                                    "Message: Mailbox Status\r\n"
 484                                    "Mailbox: %s\r\n"
 485                                    "Waiting: %d\r\n\r\n", idText, mailbox, ast_app_has_voicemail(mailbox));
 486         return 0;
 487 }
 488
 489 static int action_mailboxcount(struct mansession *s, struct message *m)
 490 {
 491         char *mailbox = astman_get_header(m, "Mailbox");
 492         char *id = astman_get_header(m,"ActionID");
 493         char idText[256] = "";
 494         int newmsgs = 0, oldmsgs = 0;
 495         if (!mailbox || !strlen(mailbox)) {
 496                 astman_send_error(s, m, "Mailbox not specified");
 497                 return 0;
 498         }
 499         ast_app_messagecount(mailbox, &newmsgs, &oldmsgs);
 500         if (id && strlen(id)) {
 501                 snprintf(idText,256,"ActionID: %s\r\n",id);
 502         }
 503         ast_cli(s->fd, "Response: Success\r\n"
 504                                    "%s"
 505                                    "Message: Mailbox Message Count\r\n"
 506                                    "Mailbox: %s\r\n"
 507                                    "NewMessages: %d\r\n"
 508                                    "OldMessages: %d\r\n"
 509                                    "\r\n",
 510                                     idText,mailbox, newmsgs, oldmsgs);
 511         return 0;
 512 }
 513
 514 static int action_extensionstate(struct mansession *s, struct message *m)
 515 {
 516         char *exten = astman_get_header(m, "Exten");
 517         char *context = astman_get_header(m, "Context");
 518         char *id = astman_get_header(m,"ActionID");
 519         char idText[256] = "";
 520         char hint[256] = "";
 521         int status;
 522         if (!exten || !strlen(exten)) {
 523                 astman_send_error(s, m, "Extension not specified");
 524                 return 0;
 525         }
 526         if (!context || !strlen(context))
 527                 context = "default";
 528         status = ast_extension_state(NULL, context, exten);
 529         ast_get_hint(hint, sizeof(hint) - 1, NULL, context, exten);
 530         if (id && strlen(id)) {
 531                 snprintf(idText,256,"ActionID: %s\r\n",id);
 532         }
 533         ast_cli(s->fd, "Response: Success\r\n"
 534                                    "%s"
 535                                    "Message: Extension Status\r\n"
 536                                    "Exten: %s\r\n"
 537                                    "Context: %s\r\n"
 538                                    "Hint: %s\r\n"
 539                                    "Status: %d\r\n\r\n",
 540                                    idText,exten, context, hint, status);
 541         return 0;
 542 }
 543
 544 static int action_timeout(struct mansession *s, struct message *m)
 545 {
 546         struct ast_channel *c = NULL;
 547         char *name = astman_get_header(m, "Channel");
 548         int timeout = atoi(astman_get_header(m, "Timeout"));
 549         if (!strlen(name)) {
 550                 astman_send_error(s, m, "No channel specified");
 551                 return 0;
 552         }
 553         if (!timeout) {
 554                 astman_send_error(s, m, "No timeout specified");
 555                 return 0;
 556         }
 557         c = ast_channel_walk(NULL);
 558         while(c) {
 559                 if (!strcasecmp(c->name, name)) {
 560                         break;
 561                 }
 562                 c = ast_channel_walk(c);
 563         }
 564         if (!c) {
 565                 astman_send_error(s, m, "No such channel");
 566                 return 0;
 567         }
 568         ast_channel_setwhentohangup(c, timeout);
 569         astman_send_ack(s, m, "Timeout Set");
 570         return 0;
 571 }
 572
 573 static int process_message(struct mansession *s, struct message *m)
 574 {
 575         char action[80];
 576         struct manager_action *tmp = first_action;
 577         char *id = astman_get_header(m,"ActionID");
 578         char idText[256] = "";
 579
 580         strncpy(action, astman_get_header(m, "Action"), sizeof(action));
 581         ast_log( LOG_DEBUG, "Manager received command '%s'\n", action );
 582
 583         if (!strlen(action)) {
 584                 astman_send_error(s, m, "Missing action in request");
 585                 return 0;
 586         }
 587         if (id && strlen(id)) {
 588                 snprintf(idText,256,"ActionID: %s\r\n",id);
 589         }
 590         if (!s->authenticated) {
 591                 if (!strcasecmp(action, "Challenge")) {
 592                         char *authtype;
 593                         authtype = astman_get_header(m, "AuthType");
 594                         if (!strcasecmp(authtype, "MD5")) {
 595                                 if (!s->challenge || !strlen(s->challenge)) {
 596                                         ast_mutex_lock(&s->lock);
 597                                         snprintf(s->challenge, sizeof(s->challenge), "%d", rand());
 598                                         ast_mutex_unlock(&s->lock);
 599                                 }
 600                                 ast_cli(s->fd, "Response: Success\r\n"
 601                                                 "%s"
 602                                                 "Challenge: %s\r\n\r\n",
 603                                                 idText,s->challenge);
 604                                 return 0;
 605                         } else {
 606                                 astman_send_error(s, m, "Must specify AuthType");
 607                                 return 0;
 608                         }
 609                 } else if (!strcasecmp(action, "Login")) {
 610                         if (authenticate(s, m)) {
 611                                 sleep(1);
 612                                 astman_send_error(s, m, "Authentication failed");
 613                                 return -1;
 614                         } else {
 615                                 s->authenticated = 1;
 616                                 if (option_verbose > 1)
 617                                         ast_verbose(VERBOSE_PREFIX_2 "Manager '%s' logged on from %s\n", s->username, inet_ntoa(s->sin.sin_addr));
 618                                 ast_log(LOG_EVENT, "Manager '%s' logged on from %s\n", s->username, inet_ntoa(s->sin.sin_addr));
 619                                 astman_send_ack(s, m, "Authentication accepted");
 620                         }
 621                 } else if (!strcasecmp(action, "Logoff")) {
 622                         astman_send_ack(s, m, "See ya");
 623                         return -1;
 624                 } else
 625                         astman_send_error(s, m, "Authentication Required");
 626         } else {
 627                 while( tmp ) {
 628                         if (!strcasecmp(action, tmp->action)) {
 629                                 if ((s->writeperm & tmp->authority) == tmp->authority) {
 630                                         if (tmp->func(s, m))
 631                                                 return -1;
 632                                 } else {
 633                                         astman_send_error(s, m, "Permission denied");
 634                                 }
 635                                 return 0;
 636                         }
 637                         tmp = tmp->next;
 638                 }
 639                 astman_send_error(s, m, "Invalid/unknown command");
 640         }
 641         return 0;
 642 }
 643
 644 static int get_input(struct mansession *s, char *output)
 645 {
 646         /* output must have at least sizeof(s->inbuf) space */
 647         int res;
 648         int x;
 649         fd_set fds;
 650         for (x=1;x<s->inlen;x++) {
 651                 if ((s->inbuf[x] == '\n') && (s->inbuf[x-1] == '\r')) {
 652                         /* Copy output data up to and including \r\n */
 653                         memcpy(output, s->inbuf, x + 1);
 654                         /* Add trailing \0 */
 655                         output[x+1] = '\0';
 656                         /* Move remaining data back to the front */
 657                         memmove(s->inbuf, s->inbuf + x + 1, s->inlen - x);
 658                         s->inlen -= (x + 1);
 659                         return 1;
 660                 }
 661         }
 662         if (s->inlen >= sizeof(s->inbuf) - 1) {
 663                 ast_log(LOG_WARNING, "Dumping long line with no return from %s: %s\n", inet_ntoa(s->sin.sin_addr), s->inbuf);
 664                 s->inlen = 0;
 665         }
 666         FD_ZERO(&fds);
 667         FD_SET(s->fd, &fds);
 668         res = ast_select(s->fd + 1, &fds, NULL, NULL, NULL);
 669         if (res < 0) {
 670                 ast_log(LOG_WARNING, "Select returned error: %s\n", strerror(errno));
 671         } else if (res > 0) {
 672                 ast_mutex_lock(&s->lock);
 673                 res = read(s->fd, s->inbuf + s->inlen, sizeof(s->inbuf) - 1 - s->inlen);
 674                 ast_mutex_unlock(&s->lock);
 675                 if (res < 1)
 676                         return -1;
 677         }
 678         s->inlen += res;
 679         s->inbuf[s->inlen] = '\0';
 680         return 0;
 681 }
 682
 683 static void *session_do(void *data)
 684 {
 685         struct mansession *s = data;
 686         struct message m;
 687         int res;
 688
 689         ast_mutex_lock(&s->lock);
 690         ast_cli(s->fd, "Asterisk Call Manager/1.0\r\n");
 691         ast_mutex_unlock(&s->lock);
 692         memset(&m, 0, sizeof(&m));
 693         for (;;) {
 694                 res = get_input(s, m.headers[m.hdrcount]);
 695                 if (res > 0) {
 696                         /* Strip trailing \r\n */
 697                         if (strlen(m.headers[m.hdrcount]) < 2)
 698                                 continue;
 699                         m.headers[m.hdrcount][strlen(m.headers[m.hdrcount]) - 2] = '\0';
 700                         if (!strlen(m.headers[m.hdrcount])) {
 701                                 if (process_message(s, &m))
 702                                         break;
 703                                 memset(&m, 0, sizeof(&m));
 704                         } else if (m.hdrcount < MAX_HEADERS - 1)
 705                                 m.hdrcount++;
 706                 } else if (res < 0)
 707                         break;
 708         }
 709         if (s->authenticated) {
 710                 if (option_verbose > 1)
 711                         ast_verbose(VERBOSE_PREFIX_2 "Manager '%s' logged off from %s\n", s->username, inet_ntoa(s->sin.sin_addr));
 712                 ast_log(LOG_EVENT, "Manager '%s' logged off from %s\n", s->username, inet_ntoa(s->sin.sin_addr));
 713         } else {
 714                 if (option_verbose > 1)
 715                         ast_verbose(VERBOSE_PREFIX_2 "Connect attempt from '%s' unable to authenticate\n", inet_ntoa(s->sin.sin_addr));
 716                 ast_log(LOG_EVENT, "Failed attempt from %s\n", inet_ntoa(s->sin.sin_addr));
 717         }
 718         destroy_session(s);
 719         return NULL;
 720 }
 721
 722 static void *accept_thread(void *ignore)
 723 {
 724         int as;
 725         struct sockaddr_in sin;
 726         int sinlen;
 727         struct mansession *s;
 728         struct protoent *p;
 729         int arg = 1;
 730         int flags;
 731         pthread_attr_t attr;
 732
 733         pthread_attr_init(&attr);
 734         pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
 735
 736         for (;;) {
 737                 sinlen = sizeof(sin);
 738                 as = accept(asock, (struct sockaddr *)&sin, &sinlen);
 739                 if (as < 0) {
 740                         ast_log(LOG_NOTICE, "Accept returned -1: %s\n", strerror(errno));
 741                         continue;
 742                 }
 743                 p = getprotobyname("tcp");
 744                 if( p ) {
 745                         if( setsockopt(as, p->p_proto, TCP_NODELAY, (char *)&arg, sizeof(arg) ) < 0 ) {
 746                                 ast_log(LOG_WARNING, "Failed to set manager tcp connection to TCP_NODELAY mode: %s\n", strerror(errno));
 747                         }
 748                 }
 749                 s = malloc(sizeof(struct mansession));
 750                 if (!s) {
 751                         ast_log(LOG_WARNING, "Failed to allocate management session: %s\n", strerror(errno));
 752                         continue;
 753                 }
 754                 memset(s, 0, sizeof(struct mansession));
 755                 memcpy(&s->sin, &sin, sizeof(sin));
 756                 /* For safety, make sure socket is non-blocking */
 757                 flags = fcntl(as, F_GETFL);
 758                 fcntl(as, F_SETFL, flags | O_NONBLOCK);
 759                 ast_mutex_init(&s->lock);
 760                 s->fd = as;
 761                 ast_mutex_lock(&sessionlock);
 762                 s->next = sessions;
 763                 sessions = s;
 764                 ast_mutex_unlock(&sessionlock);
 765                 if (pthread_create(&t, &attr, session_do, s))
 766                         destroy_session(s);
 767         }
 768         pthread_attr_destroy(&attr);
 769         return NULL;
 770 }
 771
 772 int manager_event(int category, char *event, char *fmt, ...)
 773 {
 774         struct mansession *s;
 775         char tmp[4096];
 776         va_list ap;
 777
 778         ast_mutex_lock(&sessionlock);
 779         s = sessions;
 780         while(s) {
 781                 if ((s->readperm & category) == category) {
 782                         ast_mutex_lock(&s->lock);
 783                         if (!s->blocking) {
 784                                 ast_cli(s->fd, "Event: %s\r\n", event);
 785                                 va_start(ap, fmt);
 786                                 vsnprintf(tmp, sizeof(tmp), fmt, ap);
 787                                 va_end(ap);
 788                                 write(s->fd, tmp, strlen(tmp));
 789                                 ast_cli(s->fd, "\r\n");
 790                         }
 791                         ast_mutex_unlock(&s->lock);
 792                 }
 793                 s = s->next;
 794         }
 795         ast_mutex_unlock(&sessionlock);
 796         return 0;
 797 }
 798
 799 int ast_manager_unregister( char *action ) {
 800         struct manager_action *cur = first_action, *prev = first_action;
 801
 802         ast_mutex_lock(&actionlock);
 803         while( cur ) {
 804                 if (!strcasecmp(action, cur->action)) {
 805                         prev->next = cur->next;
 806                         free(cur);
 807                         if (option_verbose > 1)
 808                                 ast_verbose(VERBOSE_PREFIX_2 "Manager unregistered action %s\n", action);
 809                         ast_mutex_unlock(&actionlock);
 810                         return 0;
 811                 }
 812                 prev = cur;
 813                 cur = cur->next;
 814         }
 815         ast_mutex_unlock(&actionlock);
 816         return 0;
 817 }
 818
 819 static int manager_state_cb(char *context, char *exten, int state, void *data)
 820 {
 821         /* Notify managers of change */
 822         manager_event(EVENT_FLAG_CALL, "ExtensionStatus", "Exten: %s\r\nContext: %s\r\nStatus: %d\r\n", exten, context, state);
 823         return 0;
 824 }
 825
 826 int ast_manager_register( char *action, int auth,
 827         int (*func)(struct mansession *s, struct message *m), char *synopsis)
 828 {
 829         struct manager_action *cur = first_action, *prev = NULL;
 830
 831         ast_mutex_lock(&actionlock);
 832         while(cur) { /* Walk the list of actions */
 833                 if (!strcasecmp(cur->action, action)) {
 834                         ast_log(LOG_WARNING, "Manager: Action '%s' already registered\n", action);
 835                         ast_mutex_unlock(&actionlock);
 836                         return -1;
 837                 }
 838                 prev = cur;
 839                 cur = cur->next;
 840         }
 841         cur = malloc( sizeof(struct manager_action) );
 842         if( !cur ) {
 843                 ast_log(LOG_WARNING, "Manager: out of memory trying to register action\n");
 844                 ast_mutex_unlock(&actionlock);
 845                 return -1;
 846         }
 847         strncpy( cur->action, action, 255 );
 848         cur->authority = auth;
 849         cur->func = func;
 850         cur->synopsis = synopsis;
 851         cur->next = NULL;
 852
 853         if( prev ) prev->next = cur;
 854         else first_action = cur;
 855
 856         if (option_verbose > 1)
 857                 ast_verbose(VERBOSE_PREFIX_2 "Manager registered action %s\n", action);
 858         ast_mutex_unlock(&actionlock);
 859         return 0;
 860 }
 861
 862 static int registered = 0;
 863
 864 int init_manager(void)
 865 {
 866         struct ast_config *cfg;
 867         char *val;
 868         int oldportno = portno;
 869         static struct sockaddr_in ba;
 870         int x = 1;
 871         if (!registered) {
 872                 /* Register default actions */
 873                 ast_manager_register( "Ping", 0, action_ping, "Ping" );
 874                 ast_manager_register( "Logoff", 0, action_logoff, "Logoff Manager" );
 875                 ast_manager_register( "Hangup", EVENT_FLAG_CALL, action_hangup, "Hangup Channel" );
 876                 ast_manager_register( "Status", EVENT_FLAG_CALL, action_status, "Status" );
 877                 ast_manager_register( "Redirect", EVENT_FLAG_CALL, action_redirect, "Redirect" );
 878                 ast_manager_register( "Originate", EVENT_FLAG_CALL, action_originate, "Originate Call" );
 879                 ast_manager_register( "MailboxStatus", EVENT_FLAG_CALL, action_mailboxstatus, "Check Mailbox" );
 880                 ast_manager_register( "Command", EVENT_FLAG_COMMAND, action_command, "Execute Command" );
 881                 ast_manager_register( "ExtensionState", EVENT_FLAG_CALL, action_extensionstate, "Check Extension Status" );
 882                 ast_manager_register( "AbsoluteTimeout", EVENT_FLAG_CALL, action_timeout, "Set Absolute Timeout" );
 883                 ast_manager_register( "MailboxCount", EVENT_FLAG_CALL, action_mailboxcount, "Check Mailbox Message Count" );
 884
 885                 ast_cli_register(&show_mancmds_cli);
 886                 ast_cli_register(&show_manconn_cli);
 887                 ast_extension_state_add(NULL, NULL, manager_state_cb, NULL);
 888                 registered = 1;
 889         }
 890         portno = DEFAULT_MANAGER_PORT;
 891         cfg = ast_load("manager.conf");
 892         if (!cfg) {
 893                 ast_log(LOG_NOTICE, "Unable to open management configuration manager.conf.  Call management disabled.\n");
 894                 return 0;
 895         }
 896         memset(&ba, 0, sizeof(ba));
 897         val = ast_variable_retrieve(cfg, "general", "enabled");
 898         if (val)
 899                 enabled = ast_true(val);
 900
 901         if ((val = ast_variable_retrieve(cfg, "general", "portno"))) {
 902                 if (sscanf(val, "%d", &portno) != 1) {
 903                         ast_log(LOG_WARNING, "Invalid port number '%s'\n", val);
 904                         portno = DEFAULT_MANAGER_PORT;
 905                 }
 906         }
 907
 908         ba.sin_family = AF_INET;
 909         ba.sin_port = htons(portno);
 910         memset(&ba.sin_addr, 0, sizeof(ba.sin_addr));
 911
 912         if ((val = ast_variable_retrieve(cfg, "general", "bindaddr"))) {
 913                 if (!inet_aton(val, &ba.sin_addr)) {
 914                         ast_log(LOG_WARNING, "Invalid address '%s' specified, using 0.0.0.0\n", val);
 915                         memset(&ba.sin_addr, 0, sizeof(ba.sin_addr));
 916                 }
 917         }
 918
 919         if ((asock > -1) && ((portno != oldportno) || !enabled)) {
 920 #if 0
 921                 /* Can't be done yet */
 922                 close(asock);
 923                 asock = -1;
 924 #else
 925                 ast_log(LOG_WARNING, "Unable to change management port / enabled\n");
 926 #endif
 927         }
 928         ast_destroy(cfg);
 929
 930         /* If not enabled, do nothing */
 931         if (!enabled) {
 932                 return 0;
 933         }
 934         if (asock < 0) {
 935                 asock = socket(AF_INET, SOCK_STREAM, 0);
 936                 if (asock < 0) {
 937                         ast_log(LOG_WARNING, "Unable to create socket: %s\n", strerror(errno));
 938                         return -1;
 939                 }
 940                 setsockopt(asock, SOL_SOCKET, SO_REUSEADDR, &x, sizeof(x));
 941                 if (bind(asock, (struct sockaddr *)&ba, sizeof(ba))) {
 942                         ast_log(LOG_WARNING, "Unable to bind socket: %s\n", strerror(errno));
 943                         close(asock);
 944                         asock = -1;
 945                         return -1;
 946                 }
 947                 if (listen(asock, 2)) {
 948                         ast_log(LOG_WARNING, "Unable to listen on socket: %s\n", strerror(errno));
 949                         close(asock);
 950                         asock = -1;
 951                         return -1;
 952                 }
 953                 if (option_verbose)
 954                         ast_verbose("Asterisk Management interface listening on port %d\n", portno);
 955                 pthread_create(&t, NULL, accept_thread, NULL);
 956         }
 957         return 0;
 958 }
 959
 960 int reload_manager(void)
 961 {
 962         manager_event(EVENT_FLAG_SYSTEM, "Reload", "Message: Reload Requested\r\n");
 963         return init_manager();
 964 }