pbx/pbx_config.c

   1 /*
   2  * Asterisk -- An open source telephony toolkit.
   3  *
   4  * Copyright (C) 1999 - 2006, Digium, Inc.
   5  *
   6  * Mark Spencer <markster@digium.com>
   7  *
   8  * See http://www.asterisk.org for more information about
   9  * the Asterisk project. Please do not directly contact
  10  * any of the maintainers of this project for assistance;
  11  * the project provides a web site, mailing lists and IRC
  12  * channels for your use.
  13  *
  14  * This program is free software, distributed under the terms of
  15  * the GNU General Public License Version 2. See the LICENSE file
  16  * at the top of the source tree.
  17  */
  18
  19 /*! \file
  20  *
  21  * \brief Populate and remember extensions from static config file
  22  *
  23  *
  24  */
  25
  26 #include "asterisk.h"
  27
  28 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
  29
  30 #include <ctype.h>
  31
  32 #include "asterisk/paths.h"     /* ast_config_AST_CONFIG_DIR */
  33 #include "asterisk/pbx.h"
  34 #include "asterisk/config.h"
  35 #include "asterisk/module.h"
  36 #include "asterisk/logger.h"
  37 #include "asterisk/cli.h"
  38 #include "asterisk/channel.h"   /* AST_MAX_EXTENSION */
  39 #include "asterisk/callerid.h"
  40
  41 static const char config[] = "extensions.conf";
  42 static const char registrar[] = "pbx_config";
  43 static char userscontext[AST_MAX_EXTENSION] = "default";
  44
  45 static int static_config = 0;
  46 static int write_protect_config = 1;
  47 static int autofallthrough_config = 1;
  48 static int clearglobalvars_config = 0;
  49 static int extenpatternmatchnew_config = 0;
  50 static char *overrideswitch_config = NULL;
  51
  52 AST_MUTEX_DEFINE_STATIC(save_dialplan_lock);
  53
  54 static struct ast_context *local_contexts = NULL;
  55 static struct ast_hashtab *local_table = NULL;
  56 /*
  57  * Prototypes for our completion functions
  58  */
  59 static char *complete_dialplan_remove_include(struct ast_cli_args *);
  60 static char *complete_dialplan_add_include(struct ast_cli_args *);
  61 static char *complete_dialplan_remove_ignorepat(struct ast_cli_args *);
  62 static char *complete_dialplan_add_ignorepat(struct ast_cli_args *);
  63 static char *complete_dialplan_remove_extension(struct ast_cli_args *);
  64 static char *complete_dialplan_add_extension(struct ast_cli_args *);
  65
  66 /*
  67  * Implementation of functions provided by this module
  68  */
  69
  70 /*!
  71  * REMOVE INCLUDE command stuff
  72  */
  73 static char *handle_cli_dialplan_remove_include(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
  74 {
  75         switch (cmd) {
  76         case CLI_INIT:
  77                 e->command = "dialplan remove include";
  78                 e->usage =
  79                         "Usage: dialplan remove include <context> from <context>\n"
  80                         "       Remove an included context from another context.\n";
  81                 return NULL;
  82         case CLI_GENERATE:
  83                 return complete_dialplan_remove_include(a);
  84         }
  85
  86         if (strcmp(a->argv[4], "from"))
  87                 return CLI_SHOWUSAGE;
  88
  89         if (!ast_context_remove_include(a->argv[5], a->argv[3], registrar)) {
  90                 ast_cli(a->fd, "We are not including '%s' into '%s' now\n",
  91                         a->argv[3], a->argv[5]);
  92                 return CLI_SUCCESS;
  93         }
  94
  95         ast_cli(a->fd, "Failed to remove '%s' include from '%s' context\n",
  96                 a->argv[3], a->argv[5]);
  97         return CLI_FAILURE;
  98 }
  99
 100 /*! \brief return true if 'name' is included by context c */
 101 static int lookup_ci(struct ast_context *c, const char *name)
 102 {
 103         struct ast_include *i = NULL;
 104
 105         if (ast_rdlock_context(c))      /* error, skip */
 106                 return 0;
 107         while ( (i = ast_walk_context_includes(c, i)) )
 108                 if (!strcmp(name, ast_get_include_name(i)))
 109                         break;
 110         ast_unlock_context(c);
 111         return i ? -1 /* success */ : 0;
 112 }
 113
 114 /*! \brief return true if 'name' is in the ignorepats for context c */
 115 static int lookup_c_ip(struct ast_context *c, const char *name)
 116 {
 117         struct ast_ignorepat *ip = NULL;
 118
 119         if (ast_rdlock_context(c))      /* error, skip */
 120                 return 0;
 121         while ( (ip = ast_walk_context_ignorepats(c, ip)) )
 122                 if (!strcmp(name, ast_get_ignorepat_name(ip)))
 123                         break;
 124         ast_unlock_context(c);
 125         return ip ? -1 /* success */ : 0;
 126 }
 127
 128 /*! \brief moves to the n-th word in the string, or empty string if none */
 129 static const char *skip_words(const char *p, int n)
 130 {
 131         int in_blank = 0;
 132         for (;n && *p; p++) {
 133                 if (isblank(*p) /* XXX order is important */ && !in_blank) {
 134                         n--;    /* one word is gone */
 135                         in_blank = 1;
 136                 } else if (/* !is_blank(*p), we know already, && */ in_blank) {
 137                         in_blank = 0;
 138                 }
 139         }
 140         return p;
 141 }
 142
 143 /*! \brief match the first 'len' chars of word. len==0 always succeeds */
 144 static int partial_match(const char *s, const char *word, int len)
 145 {
 146         return (len == 0 || !strncmp(s, word, len));
 147 }
 148
 149 /*! \brief split extension\@context in two parts, return -1 on error.
 150  * The return string is malloc'ed and pointed by *ext
 151  */
 152 static int split_ec(const char *src, char **ext, char ** const ctx, char ** const cid)
 153 {
 154         char *i, *c, *e = ast_strdup(src); /* now src is not used anymore */
 155
 156         if (e == NULL)
 157                 return -1;      /* malloc error */
 158         /* now, parse values from 'exten@context' */
 159         *ext = e;
 160         c = strchr(e, '@');
 161         if (c == NULL)  /* no context part */
 162                 *ctx = "";      /* it is not overwritten, anyways */
 163         else {  /* found context, check for duplicity ... */
 164                 *c++ = '\0';
 165                 *ctx = c;
 166                 if (strchr(c, '@')) { /* two @, not allowed */
 167                         free(e);
 168                         return -1;
 169                 }
 170         }
 171         if (cid && (i = strchr(e, '/'))) {
 172                 *i++ = '\0';
 173                 *cid = i;
 174         } else if (cid) {
 175                 /* Signal none detected */
 176                 *cid = NULL;
 177         }
 178         return 0;
 179 }
 180
 181 /* _X_ is the string we need to complete */
 182 static char *complete_dialplan_remove_include(struct ast_cli_args *a)
 183 {
 184         int which = 0;
 185         char *res = NULL;
 186         int len = strlen(a->word); /* how many bytes to match */
 187         struct ast_context *c = NULL;
 188
 189         if (a->pos == 3) {              /* "dialplan remove include _X_" */
 190                 if (ast_wrlock_contexts()) {
 191                         ast_log(LOG_ERROR, "Failed to lock context list\n");
 192                         return NULL;
 193                 }
 194                 /* walk contexts and their includes, return the n-th match */
 195                 while (!res && (c = ast_walk_contexts(c))) {
 196                         struct ast_include *i = NULL;
 197
 198                         if (ast_rdlock_context(c))      /* error ? skip this one */
 199                                 continue;
 200
 201                         while ( !res && (i = ast_walk_context_includes(c, i)) ) {
 202                                 const char *i_name = ast_get_include_name(i);
 203                                 struct ast_context *nc = NULL;
 204                                 int already_served = 0;
 205
 206                                 if (!partial_match(i_name, a->word, len))
 207                                         continue;       /* not matched */
 208
 209                                 /* check if this include is already served or not */
 210
 211                                 /* go through all contexts again till we reach actual
 212                                  * context or already_served = 1
 213                                  */
 214                                 while ( (nc = ast_walk_contexts(nc)) && nc != c && !already_served)
 215                                         already_served = lookup_ci(nc, i_name);
 216
 217                                 if (!already_served && ++which > a->n)
 218                                         res = strdup(i_name);
 219                         }
 220                         ast_unlock_context(c);
 221                 }
 222
 223                 ast_unlock_contexts();
 224                 return res;
 225         } else if (a->pos == 4) { /* "dialplan remove include CTX _X_" */
 226                 /*
 227                  * complete as 'from', but only if previous context is really
 228                  * included somewhere
 229                  */
 230                 char *context, *dupline;
 231                 const char *s = skip_words(a->line, 3); /* skip 'dialplan' 'remove' 'include' */
 232
 233                 if (a->n > 0)
 234                         return NULL;
 235                 context = dupline = strdup(s);
 236                 if (!dupline) {
 237                         ast_log(LOG_ERROR, "Out of free memory\n");
 238                         return NULL;
 239                 }
 240                 strsep(&dupline, " ");
 241
 242                 if (ast_rdlock_contexts()) {
 243                         ast_log(LOG_ERROR, "Failed to lock contexts list\n");
 244                         free(context);
 245                         return NULL;
 246                 }
 247
 248                 /* go through all contexts and check if is included ... */
 249                 while (!res && (c = ast_walk_contexts(c)))
 250                         if (lookup_ci(c, context)) /* context is really included, complete "from" command */
 251                                 res = strdup("from");
 252                 ast_unlock_contexts();
 253                 if (!res)
 254                         ast_log(LOG_WARNING, "%s not included anywhere\n", context);
 255                 free(context);
 256                 return res;
 257         } else if (a->pos == 5) { /* "dialplan remove include CTX from _X_" */
 258                 /*
 259                  * Context from which we removing include ...
 260                  */
 261                 char *context, *dupline, *from;
 262                 const char *s = skip_words(a->line, 3); /* skip 'dialplan' 'remove' 'include' */
 263                 context = dupline = strdup(s);
 264                 if (!dupline) {
 265                         ast_log(LOG_ERROR, "Out of free memory\n");
 266                         return NULL;
 267                 }
 268
 269                 strsep(&dupline, " "); /* skip context */
 270
 271                 /* fourth word must be 'from' */
 272                 from = strsep(&dupline, " ");
 273                 if (!from || strcmp(from, "from")) {
 274                         free(context);
 275                         return NULL;
 276                 }
 277
 278                 if (ast_rdlock_contexts()) {
 279                         ast_log(LOG_ERROR, "Failed to lock context list\n");
 280                         free(context);
 281                         return NULL;
 282                 }
 283
 284                 /* walk through all contexts ... */
 285                 c = NULL;
 286                 while ( !res && (c = ast_walk_contexts(c))) {
 287                         const char *c_name = ast_get_context_name(c);
 288                         if (!partial_match(c_name, a->word, len))       /* not a good target */
 289                                 continue;
 290                         /* walk through all includes and check if it is our context */
 291                         if (lookup_ci(c, context) && ++which > a->n)
 292                                 res = strdup(c_name);
 293                 }
 294                 ast_unlock_contexts();
 295                 free(context);
 296                 return res;
 297         }
 298
 299         return NULL;
 300 }
 301
 302 /*!
 303  * REMOVE EXTENSION command stuff
 304  */
 305 static char *handle_cli_dialplan_remove_extension(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
 306 {
 307         int removing_priority = 0;
 308         char *exten, *context, *cid;
 309         char *ret = CLI_FAILURE;
 310
 311         switch (cmd) {
 312         case CLI_INIT:
 313                 e->command = "dialplan remove extension";
 314                 e->usage =
 315                         "Usage: dialplan remove extension exten[/cid]@context [priority]\n"
 316                         "       Remove an extension from a given context. If a priority\n"
 317                         "       is given, only that specific priority from the given extension\n"
 318                         "       will be removed.\n";
 319                 return NULL;
 320         case CLI_GENERATE:
 321                 return complete_dialplan_remove_extension(a);
 322         }
 323
 324         if (a->argc != 5 && a->argc != 4)
 325                 return CLI_SHOWUSAGE;
 326
 327         /*
 328          * Priority input checking ...
 329          */
 330         if (a->argc == 5) {
 331                 const char *c = a->argv[4];
 332
 333                 /* check for digits in whole parameter for right priority ...
 334                  * why? because atoi (strtol) returns 0 if any characters in
 335                  * string and whole extension will be removed, it's not good
 336                  */
 337                 if (!strcmp("hint", c))
 338                         removing_priority = PRIORITY_HINT;
 339                 else {
 340                         while (*c && isdigit(*c))
 341                                 c++;
 342                         if (*c) { /* non-digit in string */
 343                                 ast_cli(a->fd, "Invalid priority '%s'\n", a->argv[4]);
 344                                 return CLI_FAILURE;
 345                         }
 346                         removing_priority = atoi(a->argv[4]);
 347                 }
 348
 349                 if (removing_priority == 0) {
 350                         ast_cli(a->fd, "If you want to remove whole extension, please " \
 351                                 "omit priority argument\n");
 352                         return CLI_FAILURE;
 353                 }
 354         }
 355
 356         /* XXX original overwrote argv[3] */
 357         /*
 358          * Format exten@context checking ...
 359          */
 360         if (split_ec(a->argv[3], &exten, &context, &cid))
 361                 return CLI_FAILURE; /* XXX malloc failure */
 362         if ((!strlen(exten)) || (!(strlen(context)))) {
 363                 ast_cli(a->fd, "Missing extension or context name in third argument '%s'\n",
 364                         a->argv[3]);
 365                 free(exten);
 366                 return CLI_FAILURE;
 367         }
 368
 369         if (!ast_context_remove_extension_callerid(context, exten, removing_priority,
 370                         /* Do NOT substitute S_OR; it is NOT the same thing */
 371                         cid ? cid : (removing_priority ? "" : NULL), cid ? 1 : 0, registrar)) {
 372                 if (!removing_priority)
 373                         ast_cli(a->fd, "Whole extension %s@%s removed\n",
 374                                 exten, context);
 375                 else
 376                         ast_cli(a->fd, "Extension %s@%s with priority %d removed\n",
 377                                 exten, context, removing_priority);
 378
 379                 ret = CLI_SUCCESS;
 380         } else {
 381                 if (cid) {
 382                         ast_cli(a->fd, "Failed to remove extension %s/%s@%s\n", exten, cid, context);
 383                 } else {
 384                         ast_cli(a->fd, "Failed to remove extension %s@%s\n", exten, context);
 385                 }
 386                 ret = CLI_FAILURE;
 387         }
 388         free(exten);
 389         return ret;
 390 }
 391
 392 static char *complete_dialplan_remove_extension(struct ast_cli_args *a)
 393 {
 394         char *ret = NULL;
 395         int which = 0;
 396
 397         if (a->pos == 3) { /* 'dialplan remove extension _X_' (exten@context ... */
 398                 struct ast_context *c = NULL;
 399                 char *context = NULL, *exten = NULL, *cid = NULL;
 400                 int le = 0;     /* length of extension */
 401                 int lc = 0;     /* length of context */
 402                 int lcid = 0; /* length of cid */
 403
 404                 lc = split_ec(a->word, &exten, &context, &cid);
 405                 if (lc) { /* error */
 406                         return NULL;
 407                 }
 408                 le = strlen(exten);
 409                 lc = strlen(context);
 410                 lcid = cid ? strlen(cid) : -1;
 411
 412                 if (ast_rdlock_contexts()) {
 413                         ast_log(LOG_ERROR, "Failed to lock context list\n");
 414                         goto error2;
 415                 }
 416
 417                 /* find our context ... */
 418                 while ( (c = ast_walk_contexts(c)) ) {  /* match our context if any */
 419                         struct ast_exten *e = NULL;
 420                         /* XXX locking ? */
 421                         if (!partial_match(ast_get_context_name(c), context, lc))
 422                                 continue;       /* context not matched */
 423                         while ( (e = ast_walk_context_extensions(c, e)) ) { /* try to complete extensions ... */
 424                                 if ( !strchr(a->word, '/') ||
 425                                                 (!strchr(a->word, '@') && partial_match(ast_get_extension_cidmatch(e), cid, lcid)) ||
 426                                                 (strchr(a->word, '@') && !strcmp(ast_get_extension_cidmatch(e), cid))) {
 427                                         if ( ((strchr(a->word, '/') || strchr(a->word, '@')) && !strcmp(ast_get_extension_name(e), exten)) ||
 428                                                  (!strchr(a->word, '/') && !strchr(a->word, '@') && partial_match(ast_get_extension_name(e), exten, le))) { /* n-th match */
 429                                                 if (++which > a->n) {
 430                                                         /* If there is an extension then return exten@context. */
 431                                                         if (ast_get_extension_matchcid(e) && (!strchr(a->word, '@') || strchr(a->word, '/'))) {
 432                                                                 if (asprintf(&ret, "%s/%s@%s", ast_get_extension_name(e), ast_get_extension_cidmatch(e), ast_get_context_name(c)) < 0) {
 433                                                                         ast_log(LOG_WARNING, "asprintf() failed: %s\n", strerror(errno));
 434                                                                         ret = NULL;
 435                                                                 }
 436                                                                 break;
 437                                                         } else if (!ast_get_extension_matchcid(e) && !strchr(a->word, '/')) {
 438                                                                 if (asprintf(&ret, "%s@%s", ast_get_extension_name(e), ast_get_context_name(c)) < 0) {
 439                                                                         ast_log(LOG_WARNING, "asprintf() failed: %s\n", strerror(errno));
 440                                                                         ret = NULL;
 441                                                                 }
 442                                                                 break;
 443                                                         }
 444                                                 }
 445                                         }
 446                                 }
 447                         }
 448                         if (e)  /* got a match */
 449                                 break;
 450                 }
 451
 452                 ast_unlock_contexts();
 453         error2:
 454                 free(exten);
 455         } else if (a->pos == 4) { /* 'dialplan remove extension EXT _X_' (priority) */
 456                 char *exten = NULL, *context, *cid, *p;
 457                 struct ast_context *c;
 458                 int le, lc, lcid, len;
 459                 const char *s = skip_words(a->line, 3); /* skip 'dialplan' 'remove' 'extension' */
 460                 int i = split_ec(s, &exten, &context, &cid);    /* parse ext@context */
 461
 462                 if (i)  /* error */
 463                         goto error3;
 464                 if ( (p = strchr(exten, ' ')) ) /* remove space after extension */
 465                         *p = '\0';
 466                 if ( (p = strchr(context, ' ')) ) /* remove space after context */
 467                         *p = '\0';
 468                 le = strlen(exten);
 469                 lc = strlen(context);
 470                 lcid = strlen(cid);
 471                 len = strlen(a->word);
 472                 if (le == 0 || lc == 0)
 473                         goto error3;
 474
 475                 if (ast_rdlock_contexts()) {
 476                         ast_log(LOG_ERROR, "Failed to lock context list\n");
 477                         goto error3;
 478                 }
 479
 480                 /* walk contexts */
 481                 c = NULL;
 482                 while ( (c = ast_walk_contexts(c)) ) {
 483                         /* XXX locking on c ? */
 484                         struct ast_exten *e;
 485                         if (strcmp(ast_get_context_name(c), context) != 0)
 486                                 continue;
 487                         /* got it, we must match here */
 488                         e = NULL;
 489                         while ( (e = ast_walk_context_extensions(c, e)) ) {
 490                                 struct ast_exten *priority;
 491                                 char buffer[10];
 492
 493                                 if (cid && strcmp(ast_get_extension_cidmatch(e), cid) != 0) {
 494                                         continue;
 495                                 }
 496                                 if (strcmp(ast_get_extension_name(e), exten) != 0)
 497                                         continue;
 498                                 /* XXX lock e ? */
 499                                 priority = NULL;
 500                                 while ( !ret && (priority = ast_walk_extension_priorities(e, priority)) ) {
 501                                         snprintf(buffer, sizeof(buffer), "%u", ast_get_extension_priority(priority));
 502                                         if (partial_match(buffer, a->word, len) && ++which > a->n) /* n-th match */
 503                                                 ret = strdup(buffer);
 504                                 }
 505                                 break;
 506                         }
 507                         break;
 508                 }
 509                 ast_unlock_contexts();
 510         error3:
 511                 free(exten);
 512         }
 513         return ret;
 514 }
 515
 516 /*!
 517  * Include context ...
 518  */
 519 static char *handle_cli_dialplan_add_include(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
 520 {
 521         switch (cmd) {
 522         case CLI_INIT:
 523                 e->command = "dialplan add include";
 524                 e->usage =
 525                         "Usage: dialplan add include <context> into <context>\n"
 526                         "       Include a context in another context.\n";
 527                 return NULL;
 528         case CLI_GENERATE:
 529                 return complete_dialplan_add_include(a);
 530         }
 531
 532         if (a->argc != 6) /* dialplan add include CTX in CTX */
 533                 return CLI_SHOWUSAGE;
 534
 535         /* fifth arg must be 'into' ... */
 536         if (strcmp(a->argv[4], "into"))
 537                 return CLI_SHOWUSAGE;
 538
 539         if (ast_context_add_include(a->argv[5], a->argv[3], registrar)) {
 540                 switch (errno) {
 541                 case ENOMEM:
 542                         ast_cli(a->fd, "Out of memory for context addition\n");
 543                         break;
 544
 545                 case EBUSY:
 546                         ast_cli(a->fd, "Failed to lock context(s) list, please try again later\n");
 547                         break;
 548
 549                 case EEXIST:
 550                         ast_cli(a->fd, "Context '%s' already included in '%s' context\n",
 551                                 a->argv[3], a->argv[5]);
 552                         break;
 553
 554                 case ENOENT:
 555                 case EINVAL:
 556                         ast_cli(a->fd, "There is no existence of context '%s'\n",
 557                                 errno == ENOENT ? a->argv[5] : a->argv[3]);
 558                         break;
 559
 560                 default:
 561                         ast_cli(a->fd, "Failed to include '%s' in '%s' context\n",
 562                                 a->argv[3], a->argv[5]);
 563                         break;
 564                 }
 565                 return CLI_FAILURE;
 566         }
 567
 568         /* show some info ... */
 569         ast_cli(a->fd, "Context '%s' included in '%s' context\n",
 570                 a->argv[3], a->argv[5]);
 571
 572         return CLI_SUCCESS;
 573 }
 574
 575 static char *complete_dialplan_add_include(struct ast_cli_args *a)
 576 {
 577         struct ast_context *c;
 578         int which = 0;
 579         char *ret = NULL;
 580         int len = strlen(a->word);
 581
 582         if (a->pos == 3) {              /* 'dialplan add include _X_' (context) ... */
 583                 if (ast_rdlock_contexts()) {
 584                         ast_log(LOG_ERROR, "Failed to lock context list\n");
 585                         return NULL;
 586                 }
 587                 for (c = NULL; !ret && (c = ast_walk_contexts(c)); )
 588                         if (partial_match(ast_get_context_name(c), a->word, len) && ++which > a->n)
 589                                 ret = strdup(ast_get_context_name(c));
 590                 ast_unlock_contexts();
 591                 return ret;
 592         } else if (a->pos == 4) { /* dialplan add include CTX _X_ */
 593                 /* complete  as 'into' if context exists or we are unable to check */
 594                 char *context, *dupline;
 595                 const char *s = skip_words(a->line, 3); /* should not fail */
 596
 597                 if (a->n != 0)  /* only once */
 598                         return NULL;
 599
 600                 /* parse context from line ... */
 601                 context = dupline = strdup(s);
 602                 if (!context) {
 603                         ast_log(LOG_ERROR, "Out of free memory\n");
 604                         return strdup("into");
 605                 }
 606                 strsep(&dupline, " ");
 607
 608                 /* check for context existence ... */
 609                 if (ast_rdlock_contexts()) {
 610                         ast_log(LOG_ERROR, "Failed to lock context list\n");
 611                         /* our fault, we can't check, so complete 'into' ... */
 612                         ret = strdup("into");
 613                 } else {
 614                         struct ast_context *ctx;
 615                         for (ctx = NULL; !ret && (ctx = ast_walk_contexts(ctx)); )
 616                                 if (!strcmp(context, ast_get_context_name(ctx)))
 617                                         ret = strdup("into"); /* found */
 618                         ast_unlock_contexts();
 619                 }
 620                 free(context);
 621                 return ret;
 622         } else if (a->pos == 5) { /* 'dialplan add include CTX into _X_' (dst context) */
 623                 char *context, *dupline, *into;
 624                 const char *s = skip_words(a->line, 3); /* should not fail */
 625                 context = dupline = strdup(s);
 626                 if (!dupline) {
 627                         ast_log(LOG_ERROR, "Out of free memory\n");
 628                         return NULL;
 629                 }
 630                 strsep(&dupline, " "); /* skip context */
 631                 into = strsep(&dupline, " ");
 632                 /* error if missing context or fifth word is not 'into' */
 633                 if (!strlen(context) || strcmp(into, "into")) {
 634                         ast_log(LOG_ERROR, "bad context %s or missing into %s\n",
 635                                 context, into);
 636                         goto error3;
 637                 }
 638
 639                 if (ast_rdlock_contexts()) {
 640                         ast_log(LOG_ERROR, "Failed to lock context list\n");
 641                         goto error3;
 642                 }
 643
 644                 for (c = NULL; (c = ast_walk_contexts(c)); )
 645                         if (!strcmp(context, ast_get_context_name(c)))
 646                                 break;
 647                 if (c) { /* first context exists, go on... */
 648                         /* go through all contexts ... */
 649                         for (c = NULL; !ret && (c = ast_walk_contexts(c)); ) {
 650                                 if (!strcmp(context, ast_get_context_name(c)))
 651                                         continue; /* skip ourselves */
 652                                 if (partial_match(ast_get_context_name(c), a->word, len) &&
 653                                                 !lookup_ci(c, context) /* not included yet */ &&
 654                                                 ++which > a->n)
 655                                         ret = strdup(ast_get_context_name(c));
 656                         }
 657                 } else {
 658                         ast_log(LOG_ERROR, "context %s not found\n", context);
 659                 }
 660                 ast_unlock_contexts();
 661         error3:
 662                 free(context);
 663                 return ret;
 664         }
 665
 666         return NULL;
 667 }
 668
 669 /*!
 670  * \brief 'save dialplan' CLI command implementation functions ...
 671  */
 672 static char *handle_cli_dialplan_save(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
 673 {
 674         char filename[256], overrideswitch[256] = "";
 675         struct ast_context *c;
 676         struct ast_config *cfg;
 677         struct ast_variable *v;
 678         int incomplete = 0; /* incomplete config write? */
 679         FILE *output;
 680         struct ast_flags config_flags = { 0 };
 681         const char *base, *slash, *file;
 682
 683         switch (cmd) {
 684         case CLI_INIT:
 685                 e->command = "dialplan save";
 686                 e->usage =
 687                         "Usage: dialplan save [/path/to/extension/file]\n"
 688                         "       Save dialplan created by pbx_config module.\n"
 689                         "\n"
 690                         "Example: dialplan save                 (/etc/asterisk/extensions.conf)\n"
 691                         "         dialplan save /home/markster  (/home/markster/extensions.conf)\n";
 692                 return NULL;
 693         case CLI_GENERATE:
 694                 return NULL;
 695         }
 696
 697         if (! (static_config && !write_protect_config)) {
 698                 ast_cli(a->fd,
 699                         "I can't save dialplan now, see '%s' example file.\n",
 700                         config);
 701                 return CLI_FAILURE;
 702         }
 703
 704         if (a->argc != 2 && a->argc != 3)
 705                 return CLI_SHOWUSAGE;
 706
 707         if (ast_mutex_lock(&save_dialplan_lock)) {
 708                 ast_cli(a->fd,
 709                         "Failed to lock dialplan saving (another proccess saving?)\n");
 710                 return CLI_FAILURE;
 711         }
 712         /* XXX the code here is quite loose, a pathname with .conf in it
 713          * is assumed to be a complete pathname
 714          */
 715         if (a->argc == 3) {     /* have config path. Look for *.conf */
 716                 base = a->argv[2];
 717                 if (!strstr(a->argv[2], ".conf")) { /*no, this is assumed to be a pathname */
 718                         /* if filename ends with '/', do not add one */
 719                         slash = (*(a->argv[2] + strlen(a->argv[2]) -1) == '/') ? "/" : "";
 720                         file = config;  /* default: 'extensions.conf' */
 721                 } else {        /* yes, complete file name */
 722                         slash = "";
 723                         file = "";
 724                 }
 725         } else {
 726                 /* no config file, default one */
 727                 base = ast_config_AST_CONFIG_DIR;
 728                 slash = "/";
 729                 file = config;
 730         }
 731         snprintf(filename, sizeof(filename), "%s%s%s", base, slash, config);
 732
 733         cfg = ast_config_load("extensions.conf", config_flags);
 734
 735         /* try to lock contexts list */
 736         if (ast_rdlock_contexts()) {
 737                 ast_cli(a->fd, "Failed to lock contexts list\n");
 738                 ast_mutex_unlock(&save_dialplan_lock);
 739                 ast_config_destroy(cfg);
 740                 return CLI_FAILURE;
 741         }
 742
 743         /* create new file ... */
 744         if (!(output = fopen(filename, "wt"))) {
 745                 ast_cli(a->fd, "Failed to create file '%s'\n",
 746                         filename);
 747                 ast_unlock_contexts();
 748                 ast_mutex_unlock(&save_dialplan_lock);
 749                 ast_config_destroy(cfg);
 750                 return CLI_FAILURE;
 751         }
 752
 753         /* fireout general info */
 754         if (overrideswitch_config) {
 755                 snprintf(overrideswitch, sizeof(overrideswitch), "overrideswitch=%s\n", overrideswitch_config);
 756         }
 757         fprintf(output, "[general]\nstatic=%s\nwriteprotect=%s\nautofallthrough=%s\nclearglobalvars=%s\n%sextenpatternmatchnew=%s\n\n",
 758                 static_config ? "yes" : "no",
 759                 write_protect_config ? "yes" : "no",
 760                 autofallthrough_config ? "yes" : "no",
 761                                 clearglobalvars_config ? "yes" : "no",
 762                                 overrideswitch_config ? overrideswitch : "",
 763                                 extenpatternmatchnew_config ? "yes" : "no");
 764
 765         if ((v = ast_variable_browse(cfg, "globals"))) {
 766                 fprintf(output, "[globals]\n");
 767                 while(v) {
 768                         fprintf(output, "%s => %s\n", v->name, v->value);
 769                         v = v->next;
 770                 }
 771                 fprintf(output, "\n");
 772         }
 773
 774         ast_config_destroy(cfg);
 775
 776 #define PUT_CTX_HDR     do { \
 777         if (!context_header_written) {  \
 778                 fprintf(output, "[%s]\n", ast_get_context_name(c));     \
 779                 context_header_written = 1;     \
 780         }       \
 781         } while (0)
 782
 783         /* walk all contexts */
 784         for (c = NULL; (c = ast_walk_contexts(c)); ) {
 785                 int context_header_written = 0;
 786                 struct ast_exten *ext, *last_written_e = NULL;
 787                 struct ast_include *i;
 788                 struct ast_ignorepat *ip;
 789                 struct ast_sw *sw;
 790
 791                 /* try to lock context and fireout all info */
 792                 if (ast_rdlock_context(c)) { /* lock failure */
 793                         incomplete = 1;
 794                         continue;
 795                 }
 796                 /* registered by this module? */
 797                 /* XXX do we need this ? */
 798                 if (!strcmp(ast_get_context_registrar(c), registrar)) {
 799                         fprintf(output, "[%s]\n", ast_get_context_name(c));
 800                         context_header_written = 1;
 801                 }
 802
 803                 /* walk extensions ... */
 804                 for (ext = NULL; (ext = ast_walk_context_extensions(c, ext)); ) {
 805                         struct ast_exten *p = NULL;
 806
 807                         /* fireout priorities */
 808                         while ( (p = ast_walk_extension_priorities(ext, p)) ) {
 809                                 if (strcmp(ast_get_extension_registrar(p), registrar) != 0) /* not this source */
 810                                         continue;
 811
 812                                 /* make empty line between different extensions */
 813                                 if (last_written_e != NULL &&
 814                                             strcmp(ast_get_extension_name(last_written_e),
 815                                                     ast_get_extension_name(p)))
 816                                         fprintf(output, "\n");
 817                                 last_written_e = p;
 818
 819                                 PUT_CTX_HDR;
 820
 821                                 if (ast_get_extension_priority(p) == PRIORITY_HINT) { /* easy */
 822                                         fprintf(output, "exten => %s,hint,%s\n",
 823                                                     ast_get_extension_name(p),
 824                                                     ast_get_extension_app(p));
 825                                 } else {
 826                                         const char *sep, *cid;
 827                                         const char *el = ast_get_extension_label(p);
 828                                         char label[128] = "";
 829
 830                                         if (ast_get_extension_matchcid(p)) {
 831                                                 sep = "/";
 832                                                 cid = ast_get_extension_cidmatch(p);
 833                                         } else
 834                                                 sep = cid = "";
 835
 836                                         if (el && (snprintf(label, sizeof(label), "(%s)", el) != (strlen(el) + 2)))
 837                                                 incomplete = 1; /* error encountered or label > 125 chars */
 838
 839                                         fprintf(output, "exten => %s%s%s,%d%s,%s(%s)\n",
 840                                             ast_get_extension_name(p), (ast_strlen_zero(sep) ? "" : sep), (ast_strlen_zero(cid) ? "" : cid),
 841                                             ast_get_extension_priority(p), label,
 842                                             ast_get_extension_app(p), (ast_strlen_zero(ast_get_extension_app_data(p)) ? "" : (const char *)ast_get_extension_app_data(p)));
 843                                 }
 844                         }
 845                 }
 846
 847                 /* written any extensions? ok, write space between exten & inc */
 848                 if (last_written_e)
 849                         fprintf(output, "\n");
 850
 851                 /* walk through includes */
 852                 for (i = NULL; (i = ast_walk_context_includes(c, i)) ; ) {
 853                         if (strcmp(ast_get_include_registrar(i), registrar) != 0)
 854                                 continue; /* not mine */
 855                         PUT_CTX_HDR;
 856                         fprintf(output, "include => %s\n", ast_get_include_name(i));
 857                 }
 858                 if (ast_walk_context_includes(c, NULL))
 859                         fprintf(output, "\n");
 860
 861                 /* walk through switches */
 862                 for (sw = NULL; (sw = ast_walk_context_switches(c, sw)) ; ) {
 863                         if (strcmp(ast_get_switch_registrar(sw), registrar) != 0)
 864                                 continue; /* not mine */
 865                         PUT_CTX_HDR;
 866                         fprintf(output, "switch => %s/%s\n",
 867                                     ast_get_switch_name(sw), ast_get_switch_data(sw));
 868                 }
 869
 870                 if (ast_walk_context_switches(c, NULL))
 871                         fprintf(output, "\n");
 872
 873                 /* fireout ignorepats ... */
 874                 for (ip = NULL; (ip = ast_walk_context_ignorepats(c, ip)); ) {
 875                         if (strcmp(ast_get_ignorepat_registrar(ip), registrar) != 0)
 876                                 continue; /* not mine */
 877                         PUT_CTX_HDR;
 878                         fprintf(output, "ignorepat => %s\n",
 879                                                 ast_get_ignorepat_name(ip));
 880                 }
 881
 882                 ast_unlock_context(c);
 883         }
 884
 885         ast_unlock_contexts();
 886         ast_mutex_unlock(&save_dialplan_lock);
 887         fclose(output);
 888
 889         if (incomplete) {
 890                 ast_cli(a->fd, "Saved dialplan is incomplete\n");
 891                 return CLI_FAILURE;
 892         }
 893
 894         ast_cli(a->fd, "Dialplan successfully saved into '%s'\n",
 895                 filename);
 896         return CLI_SUCCESS;
 897 }
 898
 899 /*!
 900  * \brief ADD EXTENSION command stuff
 901  */
 902 static char *handle_cli_dialplan_add_extension(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
 903 {
 904         char *whole_exten;
 905         char *exten, *prior;
 906         int iprior = -2;
 907         char *cidmatch, *app, *app_data;
 908         char *start, *end;
 909
 910         switch (cmd) {
 911         case CLI_INIT:
 912                 e->command = "dialplan add extension";
 913                 e->usage =
 914                         "Usage: dialplan add extension <exten>,<priority>,<app>,<app-data>\n"
 915                         "       into <context> [replace]\n\n"
 916                         "       This command will add new extension into <context>. If there is an\n"
 917                         "       existence of extension with the same priority and last 'replace'\n"
 918                         "       arguments is given here we simply replace this extension.\n"
 919                         "\n"
 920                         "Example: dialplan add extension 6123,1,Dial,IAX/216.207.245.56/6123 into local\n"
 921                         "         Now, you can dial 6123 and talk to Markster :)\n";
 922                 return NULL;
 923         case CLI_GENERATE:
 924                 return complete_dialplan_add_extension(a);
 925         }
 926
 927         /* check for arguments at first */
 928         if (a->argc != 6 && a->argc != 7)
 929                 return CLI_SHOWUSAGE;
 930         if (strcmp(a->argv[4], "into"))
 931                 return CLI_SHOWUSAGE;
 932         if (a->argc == 7)
 933                 if (strcmp(a->argv[6], "replace"))
 934                         return CLI_SHOWUSAGE;
 935
 936         whole_exten = ast_strdupa(a->argv[3]);
 937         exten = strsep(&whole_exten,",");
 938         if (strchr(exten, '/')) {
 939                 cidmatch = exten;
 940                 strsep(&cidmatch,"/");
 941         } else {
 942                 cidmatch = NULL;
 943         }
 944         prior = strsep(&whole_exten,",");
 945         if (prior) {
 946                 if (!strcmp(prior, "hint")) {
 947                         iprior = PRIORITY_HINT;
 948                 } else {
 949                         if (sscanf(prior, "%30d", &iprior) != 1) {
 950                                 ast_cli(a->fd, "'%s' is not a valid priority\n", prior);
 951                                 prior = NULL;
 952                         }
 953                 }
 954         }
 955         app = whole_exten;
 956         if (app && (start = strchr(app, '(')) && (end = strrchr(app, ')'))) {
 957                 *start = *end = '\0';
 958                 app_data = start + 1;
 959         } else {
 960                 if (app) {
 961                         app_data = strchr(app, ',');
 962                         if (app_data) {
 963                                 *app_data = '\0';
 964                                 app_data++;
 965                         }
 966                 } else
 967                         app_data = NULL;
 968         }
 969
 970         if (!exten || !prior || !app || (!app_data && iprior != PRIORITY_HINT))
 971                 return CLI_SHOWUSAGE;
 972
 973         if (!app_data)
 974                 app_data="";
 975         if (ast_add_extension(a->argv[5], a->argc == 7 ? 1 : 0, exten, iprior, NULL, cidmatch, app,
 976                 (void *)strdup(app_data), ast_free_ptr, registrar)) {
 977                 switch (errno) {
 978                 case ENOMEM:
 979                         ast_cli(a->fd, "Out of free memory\n");
 980                         break;
 981
 982                 case EBUSY:
 983                         ast_cli(a->fd, "Failed to lock context(s) list, please try again later\n");
 984                         break;
 985
 986                 case ENOENT:
 987                         ast_cli(a->fd, "No existence of '%s' context\n", a->argv[5]);
 988                         break;
 989
 990                 case EEXIST:
 991                         ast_cli(a->fd, "Extension %s@%s with priority %s already exists\n",
 992                                 exten, a->argv[5], prior);
 993                         break;
 994
 995                 default:
 996                         ast_cli(a->fd, "Failed to add '%s,%s,%s,%s' extension into '%s' context\n",
 997                                         exten, prior, app, app_data, a->argv[5]);
 998                         break;
 999                 }
1000                 return CLI_FAILURE;
1001         }
1002
1003         if (a->argc == 7)
1004                 ast_cli(a->fd, "Extension %s@%s (%s) replace by '%s,%s,%s,%s'\n",
1005                         exten, a->argv[5], prior, exten, prior, app, app_data);
1006         else
1007                 ast_cli(a->fd, "Extension '%s,%s,%s,%s' added into '%s' context\n",
1008                         exten, prior, app, app_data, a->argv[5]);
1009
1010         return CLI_SUCCESS;
1011 }
1012
1013 /*! dialplan add extension 6123,1,Dial,IAX/212.71.138.13/6123 into local */
1014 static char *complete_dialplan_add_extension(struct ast_cli_args *a)
1015 {
1016         int which = 0;
1017
1018         if (a->pos == 4) {              /* complete 'into' word ... */
1019                 return (a->n == 0) ? strdup("into") : NULL;
1020         } else if (a->pos == 5) { /* complete context */
1021                 struct ast_context *c = NULL;
1022                 int len = strlen(a->word);
1023                 char *res = NULL;
1024
1025                 /* try to lock contexts list ... */
1026                 if (ast_rdlock_contexts()) {
1027                         ast_log(LOG_WARNING, "Failed to lock contexts list\n");
1028                         return NULL;
1029                 }
1030
1031                 /* walk through all contexts */
1032                 while ( !res && (c = ast_walk_contexts(c)) )
1033                         if (partial_match(ast_get_context_name(c), a->word, len) && ++which > a->n)
1034                                 res = strdup(ast_get_context_name(c));
1035                 ast_unlock_contexts();
1036                 return res;
1037         } else if (a->pos == 6) {
1038                 return a->n == 0 ? strdup("replace") : NULL;
1039         }
1040         return NULL;
1041 }
1042
1043 /*!
1044  * IGNOREPAT CLI stuff
1045  */
1046 static char *handle_cli_dialplan_add_ignorepat(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
1047 {
1048         switch (cmd) {
1049         case CLI_INIT:
1050                 e->command = "dialplan add ignorepat";
1051                 e->usage =
1052                         "Usage: dialplan add ignorepat <pattern> into <context>\n"
1053                         "       This command adds a new ignore pattern into context <context>\n"
1054                         "\n"
1055                         "Example: dialplan add ignorepat _3XX into local\n";
1056                 return NULL;
1057         case CLI_GENERATE:
1058                 return complete_dialplan_add_ignorepat(a);
1059         }
1060
1061         if (a->argc != 6)
1062                 return CLI_SHOWUSAGE;
1063
1064         if (strcmp(a->argv[4], "into"))
1065                 return CLI_SHOWUSAGE;
1066
1067         if (ast_context_add_ignorepat(a->argv[5], a->argv[3], registrar)) {
1068                 switch (errno) {
1069                 case ENOMEM:
1070                         ast_cli(a->fd, "Out of free memory\n");
1071                         break;
1072
1073                 case ENOENT:
1074                         ast_cli(a->fd, "There is no existence of '%s' context\n", a->argv[5]);
1075                         break;
1076
1077                 case EEXIST:
1078                         ast_cli(a->fd, "Ignore pattern '%s' already included in '%s' context\n",
1079                                 a->argv[3], a->argv[5]);
1080                         break;
1081
1082                 case EBUSY:
1083                         ast_cli(a->fd, "Failed to lock context(s) list, please, try again later\n");
1084                         break;
1085
1086                 default:
1087                         ast_cli(a->fd, "Failed to add ingore pattern '%s' into '%s' context\n",
1088                                 a->argv[3], a->argv[5]);
1089                         break;
1090                 }
1091                 return CLI_FAILURE;
1092         }
1093
1094         ast_cli(a->fd, "Ignore pattern '%s' added into '%s' context\n",
1095                 a->argv[3], a->argv[5]);
1096
1097         return CLI_SUCCESS;
1098 }
1099
1100 static char *complete_dialplan_add_ignorepat(struct ast_cli_args *a)
1101 {
1102         if (a->pos == 4)
1103                 return a->n == 0 ? strdup("into") : NULL;
1104         else if (a->pos == 5) {
1105                 struct ast_context *c;
1106                 int which = 0;
1107                 char *dupline, *ignorepat = NULL;
1108                 const char *s;
1109                 char *ret = NULL;
1110                 int len = strlen(a->word);
1111
1112                 /* XXX skip first three words 'dialplan' 'add' 'ignorepat' */
1113                 s = skip_words(a->line, 3);
1114                 if (s == NULL)
1115                         return NULL;
1116                 dupline = strdup(s);
1117                 if (!dupline) {
1118                         ast_log(LOG_ERROR, "Malloc failure\n");
1119                         return NULL;
1120                 }
1121                 ignorepat = strsep(&dupline, " ");
1122
1123                 if (ast_rdlock_contexts()) {
1124                         ast_log(LOG_ERROR, "Failed to lock contexts list\n");
1125                         return NULL;
1126                 }
1127
1128                 for (c = NULL; !ret && (c = ast_walk_contexts(c));) {
1129                         int found = 0;
1130
1131                         if (!partial_match(ast_get_context_name(c), a->word, len))
1132                                 continue; /* not mine */
1133                         if (ignorepat) /* there must be one, right ? */
1134                                 found = lookup_c_ip(c, ignorepat);
1135                         if (!found && ++which > a->n)
1136                                 ret = strdup(ast_get_context_name(c));
1137                 }
1138
1139                 free(ignorepat);
1140                 ast_unlock_contexts();
1141                 return ret;
1142         }
1143
1144         return NULL;
1145 }
1146
1147 static char *handle_cli_dialplan_remove_ignorepat(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
1148 {
1149         switch (cmd) {
1150         case CLI_INIT:
1151                 e->command = "dialplan remove ignorepat";
1152                 e->usage =
1153                         "Usage: dialplan remove ignorepat <pattern> from <context>\n"
1154                         "       This command removes an ignore pattern from context <context>\n"
1155                         "\n"
1156                         "Example: dialplan remove ignorepat _3XX from local\n";
1157                 return NULL;
1158         case CLI_GENERATE:
1159                 return complete_dialplan_remove_ignorepat(a);
1160         }
1161
1162         if (a->argc != 6)
1163                 return CLI_SHOWUSAGE;
1164
1165         if (strcmp(a->argv[4], "from"))
1166                 return CLI_SHOWUSAGE;
1167
1168         if (ast_context_remove_ignorepat(a->argv[5], a->argv[3], registrar)) {
1169                 switch (errno) {
1170                 case EBUSY:
1171                         ast_cli(a->fd, "Failed to lock context(s) list, please try again later\n");
1172                         break;
1173
1174                 case ENOENT:
1175                         ast_cli(a->fd, "There is no existence of '%s' context\n", a->argv[5]);
1176                         break;
1177
1178                 case EINVAL:
1179                         ast_cli(a->fd, "There is no existence of '%s' ignore pattern in '%s' context\n",
1180                                         a->argv[3], a->argv[5]);
1181                         break;
1182
1183                 default:
1184                         ast_cli(a->fd, "Failed to remove ignore pattern '%s' from '%s' context\n",
1185                                         a->argv[3], a->argv[5]);
1186                         break;
1187                 }
1188                 return CLI_FAILURE;
1189         }
1190
1191         ast_cli(a->fd, "Ignore pattern '%s' removed from '%s' context\n",
1192                 a->argv[3], a->argv[5]);
1193         return CLI_SUCCESS;
1194 }
1195
1196 static char *complete_dialplan_remove_ignorepat(struct ast_cli_args *a)
1197 {
1198         struct ast_context *c;
1199         int which = 0;
1200         char *ret = NULL;
1201
1202         if (a->pos == 3) {
1203                 int len = strlen(a->word);
1204                 if (ast_rdlock_contexts()) {
1205                         ast_log(LOG_WARNING, "Failed to lock contexts list\n");
1206                         return NULL;
1207                 }
1208
1209                 for (c = NULL; !ret && (c = ast_walk_contexts(c));) {
1210                         struct ast_ignorepat *ip;
1211
1212                         if (ast_rdlock_context(c))      /* error, skip it */
1213                                 continue;
1214
1215                         for (ip = NULL; !ret && (ip = ast_walk_context_ignorepats(c, ip));) {
1216                                 if (partial_match(ast_get_ignorepat_name(ip), a->word, len) && ++which > a->n) {
1217                                         /* n-th match */
1218                                         struct ast_context *cw = NULL;
1219                                         int found = 0;
1220                                         while ( (cw = ast_walk_contexts(cw)) && cw != c && !found) {
1221                                                 /* XXX do i stop on c, or skip it ? */
1222                                                 found = lookup_c_ip(cw, ast_get_ignorepat_name(ip));
1223                                         }
1224                                         if (!found)
1225                                                 ret = strdup(ast_get_ignorepat_name(ip));
1226                                 }
1227                         }
1228                         ast_unlock_context(c);
1229                 }
1230                 ast_unlock_contexts();
1231                 return ret;
1232         } else if (a->pos == 4) {
1233                  return a->n == 0 ? strdup("from") : NULL;
1234         } else if (a->pos == 5) { /* XXX check this */
1235                 char *dupline, *duplinet, *ignorepat;
1236                 int len = strlen(a->word);
1237
1238                 dupline = strdup(a->line);
1239                 if (!dupline) {
1240                         ast_log(LOG_WARNING, "Out of free memory\n");
1241                         return NULL;
1242                 }
1243
1244                 duplinet = dupline;
1245                 strsep(&duplinet, " ");
1246                 strsep(&duplinet, " ");
1247                 ignorepat = strsep(&duplinet, " ");
1248
1249                 if (!ignorepat) {
1250                         free(dupline);
1251                         return NULL;
1252                 }
1253
1254                 if (ast_rdlock_contexts()) {
1255                         ast_log(LOG_WARNING, "Failed to lock contexts list\n");
1256                         free(dupline);
1257                         return NULL;
1258                 }
1259
1260                 for (c = NULL; !ret && (c = ast_walk_contexts(c)); ) {
1261                         if (ast_rdlock_context(c))      /* fail, skip it */
1262                                 continue;
1263                         if (!partial_match(ast_get_context_name(c), a->word, len))
1264                                 continue;
1265                         if (lookup_c_ip(c, ignorepat) && ++which > a->n)
1266                                 ret = strdup(ast_get_context_name(c));
1267                         ast_unlock_context(c);
1268                 }
1269                 ast_unlock_contexts();
1270                 free(dupline);
1271                 return NULL;
1272         }
1273
1274         return NULL;
1275 }
1276
1277 static int pbx_load_module(void);
1278
1279 static char *handle_cli_dialplan_reload(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
1280 {
1281         switch (cmd) {
1282         case CLI_INIT:
1283                 e->command = "dialplan reload";
1284                 e->usage =
1285                         "Usage: dialplan reload\n"
1286                         "       Reload extensions.conf without reloading any other\n"
1287                         "       modules.  This command does not delete global variables\n"
1288                         "       unless clearglobalvars is set to yes in extensions.conf\n";
1289                 return NULL;
1290         case CLI_GENERATE:
1291                 return NULL;
1292         }
1293
1294         if (a->argc != 2)
1295                 return CLI_SHOWUSAGE;
1296
1297         if (clearglobalvars_config)
1298                 pbx_builtin_clear_globals();
1299
1300         pbx_load_module();
1301         ast_cli(a->fd, "Dialplan reloaded.\n");
1302         return CLI_SUCCESS;
1303 }
1304
1305 /*!
1306  * CLI entries for commands provided by this module
1307  */
1308 static struct ast_cli_entry cli_pbx_config[] = {
1309         AST_CLI_DEFINE(handle_cli_dialplan_add_extension,    "Add new extension into context"),
1310         AST_CLI_DEFINE(handle_cli_dialplan_remove_extension, "Remove a specified extension"),
1311         AST_CLI_DEFINE(handle_cli_dialplan_add_ignorepat,    "Add new ignore pattern"),
1312         AST_CLI_DEFINE(handle_cli_dialplan_remove_ignorepat, "Remove ignore pattern from context"),
1313         AST_CLI_DEFINE(handle_cli_dialplan_add_include,      "Include context in other context"),
1314         AST_CLI_DEFINE(handle_cli_dialplan_remove_include,   "Remove a specified include from context"),
1315         AST_CLI_DEFINE(handle_cli_dialplan_reload,           "Reload extensions and *only* extensions")
1316 };
1317
1318 static struct ast_cli_entry cli_dialplan_save =
1319         AST_CLI_DEFINE(handle_cli_dialplan_save, "Save dialplan");
1320
1321 /*!
1322  * Standard module functions ...
1323  */
1324 static int unload_module(void)
1325 {
1326         if (static_config && !write_protect_config)
1327                 ast_cli_unregister(&cli_dialplan_save);
1328         if (overrideswitch_config) {
1329                 ast_free(overrideswitch_config);
1330         }
1331         ast_cli_unregister_multiple(cli_pbx_config, ARRAY_LEN(cli_pbx_config));
1332         ast_context_destroy(NULL, registrar);
1333         return 0;
1334 }
1335
1336 /*!\note Protect against misparsing based upon commas in the middle of fields
1337  * like character classes.  We've taken steps to permit pretty much every other
1338  * printable character in a character class, so properly handling a comma at
1339  * this level is a natural extension.  This is almost like the standard
1340  * application parser in app.c, except that it handles square brackets. */
1341 static char *pbx_strsep(char **destructible, const char *delim)
1342 {
1343         int square = 0;
1344         char *res = *destructible;
1345         for (; destructible && *destructible && **destructible; (*destructible)++) {
1346                 if (**destructible == '[' && !strchr(delim, '[')) {
1347                         square++;
1348                 } else if (**destructible == ']' && !strchr(delim, ']')) {
1349                         if (square) {
1350                                 square--;
1351                         }
1352                 } else if (**destructible == '\\' && !strchr(delim, '\\')) {
1353                         (*destructible)++;
1354                 } else if (strchr(delim, **destructible) && !square) {
1355                         **destructible = '\0';
1356                         (*destructible)++;
1357                         break;
1358                 }
1359         }
1360         if (destructible && *destructible && **destructible == '\0') {
1361                 *destructible = NULL;
1362         }
1363         return res;
1364 }
1365
1366 static int pbx_load_config(const char *config_file)
1367 {
1368         struct ast_config *cfg;
1369         char *end;
1370         char *label;
1371 #ifdef LOW_MEMORY
1372         char realvalue[256];
1373 #else
1374         char realvalue[8192];
1375 #endif
1376         int lastpri = -2;
1377         struct ast_context *con;
1378         struct ast_variable *v;
1379         const char *cxt;
1380         const char *aft;
1381         const char *newpm, *ovsw;
1382         struct ast_flags config_flags = { 0 };
1383         char lastextension[256];
1384         cfg = ast_config_load(config_file, config_flags);
1385         if (!cfg || cfg == CONFIG_STATUS_FILEINVALID)
1386                 return 0;
1387
1388         /* Use existing config to populate the PBX table */
1389         static_config = ast_true(ast_variable_retrieve(cfg, "general", "static"));
1390         write_protect_config = ast_true(ast_variable_retrieve(cfg, "general", "writeprotect"));
1391         if ((aft = ast_variable_retrieve(cfg, "general", "autofallthrough")))
1392                 autofallthrough_config = ast_true(aft);
1393         if ((newpm = ast_variable_retrieve(cfg, "general", "extenpatternmatchnew")))
1394                 extenpatternmatchnew_config = ast_true(newpm);
1395         clearglobalvars_config = ast_true(ast_variable_retrieve(cfg, "general", "clearglobalvars"));
1396         if ((ovsw = ast_variable_retrieve(cfg, "general", "overrideswitch"))) {
1397                 if (overrideswitch_config) {
1398                         ast_free(overrideswitch_config);
1399                 }
1400                 if (!ast_strlen_zero(ovsw)) {
1401                         overrideswitch_config = ast_strdup(ovsw);
1402                 } else {
1403                         overrideswitch_config = NULL;
1404                 }
1405         }
1406
1407         ast_copy_string(userscontext, ast_variable_retrieve(cfg, "general", "userscontext") ?: "default", sizeof(userscontext));
1408
1409         for (v = ast_variable_browse(cfg, "globals"); v; v = v->next) {
1410                 pbx_substitute_variables_helper(NULL, v->value, realvalue, sizeof(realvalue) - 1);
1411                 pbx_builtin_setvar_helper(NULL, v->name, realvalue);
1412         }
1413         for (cxt = ast_category_browse(cfg, NULL);
1414              cxt;
1415              cxt = ast_category_browse(cfg, cxt)) {
1416                 /* All categories but "general" or "globals" are considered contexts */
1417                 if (!strcasecmp(cxt, "general") || !strcasecmp(cxt, "globals")) {
1418                         continue;
1419                 }
1420                 if (!(con = ast_context_find_or_create(&local_contexts, local_table, cxt, registrar))) {
1421                         continue;
1422                 }
1423
1424                 /* Reset continuation items at the beginning of each context */
1425                 lastextension[0] = '\0';
1426                 lastpri = -2;
1427
1428                 for (v = ast_variable_browse(cfg, cxt); v; v = v->next) {
1429                         char *tc = NULL;
1430                         char realext[256] = "";
1431                         char *stringp, *ext;
1432
1433                         if (!strncasecmp(v->name, "same", 4)) {
1434                                 if (ast_strlen_zero(lastextension)) {
1435                                         ast_log(LOG_ERROR, "No previous pattern in the first entry of context '%s' to match '%s' at line %d!\n", cxt, v->name, v->lineno);
1436                                         continue;
1437                                 }
1438                                 if ((stringp = tc = ast_strdup(v->value))) {
1439                                         ast_copy_string(realext, lastextension, sizeof(realext));
1440                                         goto process_extension;
1441                                 }
1442                         } else if (!strcasecmp(v->name, "exten")) {
1443                                 int ipri;
1444                                 char *plus, *firstp;
1445                                 char *pri, *appl, *data, *cidmatch;
1446
1447                                 if (!(stringp = tc = ast_strdup(v->value))) {
1448                                         continue;
1449                                 }
1450
1451                                 ext = S_OR(pbx_strsep(&stringp, ","), "");
1452                                 pbx_substitute_variables_helper(NULL, ext, realext, sizeof(realext) - 1);
1453                                 ast_copy_string(lastextension, realext, sizeof(lastextension));
1454 process_extension:
1455                                 ipri = -2;
1456                                 if ((cidmatch = strchr(realext, '/'))) {
1457                                         *cidmatch++ = '\0';
1458                                         ast_shrink_phone_number(cidmatch);
1459                                 }
1460                                 pri = S_OR(strsep(&stringp, ","), "");
1461                                 pri = ast_skip_blanks(pri);
1462                                 pri = ast_trim_blanks(pri);
1463                                 if ((label = strchr(pri, '('))) {
1464                                         *label++ = '\0';
1465                                         if ((end = strchr(label, ')'))) {
1466                                                 *end = '\0';
1467                                         } else {
1468                                                 ast_log(LOG_WARNING, "Label missing trailing ')' at line %d\n", v->lineno);
1469                                         }
1470                                 }
1471                                 if ((plus = strchr(pri, '+'))) {
1472                                         *plus++ = '\0';
1473                                 }
1474                                 if (!strcmp(pri,"hint")) {
1475                                         ipri = PRIORITY_HINT;
1476                                 } else if (!strcmp(pri, "next") || !strcmp(pri, "n")) {
1477                                         if (lastpri > -2) {
1478                                                 ipri = lastpri + 1;
1479                                         } else {
1480                                                 ast_log(LOG_WARNING, "Can't use 'next' priority on the first entry at line %d!\n", v->lineno);
1481                                         }
1482                                 } else if (!strcmp(pri, "same") || !strcmp(pri, "s")) {
1483                                         if (lastpri > -2) {
1484                                                 ipri = lastpri;
1485                                         } else {
1486                                                 ast_log(LOG_WARNING, "Can't use 'same' priority on the first entry at line %d!\n", v->lineno);
1487                                         }
1488                                 } else if (sscanf(pri, "%30d", &ipri) != 1 &&
1489                                            (ipri = ast_findlabel_extension2(NULL, con, realext, pri, cidmatch)) < 1) {
1490                                         ast_log(LOG_WARNING, "Invalid priority/label '%s' at line %d\n", pri, v->lineno);
1491                                         ipri = 0;
1492                                 }
1493                                 appl = S_OR(stringp, "");
1494                                 /* Find the first occurrence of '(' */
1495                                 if (!(firstp = strchr(appl, '('))) {
1496                                         /* No arguments */
1497                                         data = "";
1498                                 } else {
1499                                         char *orig_appl = ast_strdup(appl);
1500
1501                                         if (!orig_appl)
1502                                                 return -1;
1503
1504                                         appl = strsep(&stringp, "(");
1505
1506                                         /* check if there are variables or expressions without an application, like: exten => 100,hint,DAHDI/g0/${GLOBAL(var)}  */
1507                                         if (strstr(appl, "${") || strstr(appl, "$[")){
1508                                                 /* set appl to original one */
1509                                                 strcpy(appl, orig_appl);
1510                                                 /* set no data */
1511                                                 data = "";
1512                                         /* no variable before application found -> go ahead */
1513                                         } else {
1514                                                 data = S_OR(stringp, "");
1515                                                 if ((end = strrchr(data, ')'))) {
1516                                                         *end = '\0';
1517                                                 } else {
1518                                                         ast_log(LOG_WARNING, "No closing parenthesis found? '%s(%s' at line %d\n", appl, data, v->lineno);
1519                                                 }
1520                                         }
1521                                         ast_free(orig_appl);
1522                                 }
1523
1524                                 appl = ast_skip_blanks(appl);
1525                                 if (ipri) {
1526                                         if (plus) {
1527                                                 ipri += atoi(plus);
1528                                         }
1529                                         lastpri = ipri;
1530                                         if (!ast_opt_dont_warn && !strcmp(realext, "_.")) {
1531                                                 ast_log(LOG_WARNING, "The use of '_.' for an extension is strongly discouraged and can have unexpected behavior.  Please use '_X.' instead at line %d\n", v->lineno);
1532                                         }
1533                                         if (ast_add_extension2(con, 0, realext, ipri, label, cidmatch, appl, strdup(data), ast_free_ptr, registrar)) {
1534                                                 ast_log(LOG_WARNING, "Unable to register extension at line %d\n", v->lineno);
1535                                         }
1536                                 }
1537                                 free(tc);
1538                         } else if (!strcasecmp(v->name, "include")) {
1539                                 pbx_substitute_variables_helper(NULL, v->value, realvalue, sizeof(realvalue) - 1);
1540                                 if (ast_context_add_include2(con, realvalue, registrar)) {
1541                                         switch (errno) {
1542                                                 case ENOMEM:
1543                                                         ast_log(LOG_WARNING, "Out of memory for context addition\n");
1544                                                         break;
1545
1546                                                 case EBUSY:
1547                                                         ast_log(LOG_WARNING, "Failed to lock context(s) list, please try again later\n");
1548                                                         break;
1549
1550                                                 case EEXIST:
1551                                                         ast_log(LOG_WARNING, "Context '%s' already included in '%s' context on include at line %d\n",
1552                                                                         v->value, cxt, v->lineno);
1553                                                         break;
1554
1555                                                 case ENOENT:
1556                                                 case EINVAL:
1557                                                         ast_log(LOG_WARNING, "There is no existence of context '%s' included at line %d\n",
1558                                                                         errno == ENOENT ? v->value : cxt, v->lineno);
1559                                                         break;
1560
1561                                                 default:
1562                                                         ast_log(LOG_WARNING, "Failed to include '%s' in '%s' context at line %d\n",
1563                                                                         v->value, cxt, v->lineno);
1564                                                         break;
1565                                         }
1566                                 }
1567                         } else if (!strcasecmp(v->name, "ignorepat")) {
1568                                 pbx_substitute_variables_helper(NULL, v->value, realvalue, sizeof(realvalue) - 1);
1569                                 if (ast_context_add_ignorepat2(con, realvalue, registrar)) {
1570                                         ast_log(LOG_WARNING, "Unable to include ignorepat '%s' in context '%s' at line %d\n", v->value, cxt, v->lineno);
1571                                 }
1572                         } else if (!strcasecmp(v->name, "switch") || !strcasecmp(v->name, "lswitch") || !strcasecmp(v->name, "eswitch")) {
1573                                 char *stringp = realvalue;
1574                                 char *appl, *data;
1575
1576                                 if (!strcasecmp(v->name, "switch")) {
1577                                         pbx_substitute_variables_helper(NULL, v->value, realvalue, sizeof(realvalue) - 1);
1578                                 } else {
1579                                         ast_copy_string(realvalue, v->value, sizeof(realvalue));
1580                                 }
1581                                 appl = strsep(&stringp, "/");
1582                                 data = S_OR(stringp, "");
1583                                 if (ast_context_add_switch2(con, appl, data, !strcasecmp(v->name, "eswitch"), registrar)) {
1584                                         ast_log(LOG_WARNING, "Unable to include switch '%s' in context '%s' at line %d\n", v->value, cxt, v->lineno);
1585                                 }
1586                         } else {
1587                                 ast_log(LOG_WARNING, "==!!== Unknown directive: %s at line %d -- IGNORING!!!\n", v->name, v->lineno);
1588                         }
1589                 }
1590         }
1591         ast_config_destroy(cfg);
1592         return 1;
1593 }
1594
1595 static void append_interface(char *iface, int maxlen, char *add)
1596 {
1597         int len = strlen(iface);
1598         if (strlen(add) + len < maxlen - 2) {
1599                 if (strlen(iface)) {
1600                         iface[len] = '&';
1601                         strcpy(iface + len + 1, add);
1602                 } else
1603                         strcpy(iface, add);
1604         }
1605 }
1606
1607 static void pbx_load_users(void)
1608 {
1609         struct ast_config *cfg;
1610         char *cat, *chan;
1611         const char *dahdichan;
1612         const char *hasexten, *altexts;
1613         char tmp[256];
1614         char iface[256];
1615         char dahdicopy[256];
1616         char *ext, altcopy[256];
1617         char *c;
1618         int len;
1619         int hasvoicemail;
1620         int start, finish, x;
1621         struct ast_context *con = NULL;
1622         struct ast_flags config_flags = { 0 };
1623
1624         cfg = ast_config_load("users.conf", config_flags);
1625         if (!cfg)
1626                 return;
1627
1628         for (cat = ast_category_browse(cfg, NULL); cat ; cat = ast_category_browse(cfg, cat)) {
1629                 if (!strcasecmp(cat, "general"))
1630                         continue;
1631                 iface[0] = '\0';
1632                 len = sizeof(iface);
1633                 if (ast_true(ast_config_option(cfg, cat, "hassip"))) {
1634                         snprintf(tmp, sizeof(tmp), "SIP/%s", cat);
1635                         append_interface(iface, sizeof(iface), tmp);
1636                 }
1637                 if (ast_true(ast_config_option(cfg, cat, "hasiax"))) {
1638                         snprintf(tmp, sizeof(tmp), "IAX2/%s", cat);
1639                         append_interface(iface, sizeof(iface), tmp);
1640                 }
1641                 if (ast_true(ast_config_option(cfg, cat, "hash323"))) {
1642                         snprintf(tmp, sizeof(tmp), "H323/%s", cat);
1643                         append_interface(iface, sizeof(iface), tmp);
1644                 }
1645                 hasexten = ast_config_option(cfg, cat, "hasexten");
1646                 if (hasexten && !ast_true(hasexten))
1647                         continue;
1648                 hasvoicemail = ast_true(ast_config_option(cfg, cat, "hasvoicemail"));
1649                 dahdichan = ast_variable_retrieve(cfg, cat, "dahdichan");
1650                 if (!dahdichan)
1651                         dahdichan = ast_variable_retrieve(cfg, "general", "dahdichan");
1652                 if (!ast_strlen_zero(dahdichan)) {
1653                         ast_copy_string(dahdicopy, dahdichan, sizeof(dahdicopy));
1654                         c = dahdicopy;
1655                         chan = strsep(&c, ",");
1656                         while (chan) {
1657                                 if (sscanf(chan, "%30d-%30d", &start, &finish) == 2) {
1658                                         /* Range */
1659                                 } else if (sscanf(chan, "%30d", &start)) {
1660                                         /* Just one */
1661                                         finish = start;
1662                                 } else {
1663                                         start = 0; finish = 0;
1664                                 }
1665                                 if (finish < start) {
1666                                         x = finish;
1667                                         finish = start;
1668                                         start = x;
1669                                 }
1670                                 for (x = start; x <= finish; x++) {
1671                                         snprintf(tmp, sizeof(tmp), "DAHDI/%d", x);
1672                                         append_interface(iface, sizeof(iface), tmp);
1673                                 }
1674                                 chan = strsep(&c, ",");
1675                         }
1676                 }
1677                 if (!ast_strlen_zero(iface)) {
1678                         /* Only create a context here when it is really needed. Otherwise default empty context
1679                         created by pbx_config may conflict with the one explicitly created by pbx_ael */
1680                         if (!con)
1681                                 con = ast_context_find_or_create(&local_contexts, local_table, userscontext, registrar);
1682
1683                         if (!con) {
1684                                 ast_log(LOG_ERROR, "Can't find/create user context '%s'\n", userscontext);
1685                                 return;
1686                         }
1687
1688                         /* Add hint */
1689                         ast_add_extension2(con, 0, cat, -1, NULL, NULL, iface, NULL, NULL, registrar);
1690                         /* If voicemail, use "stdexten" else use plain old dial */
1691                         if (hasvoicemail) {
1692                                 snprintf(tmp, sizeof(tmp), "stdexten,%s,${HINT}", cat);
1693                                 ast_add_extension2(con, 0, cat, 1, NULL, NULL, "Macro", strdup(tmp), ast_free_ptr, registrar);
1694                         } else {
1695                                 ast_add_extension2(con, 0, cat, 1, NULL, NULL, "Dial", strdup("${HINT}"), ast_free_ptr, registrar);
1696                         }
1697                         altexts = ast_variable_retrieve(cfg, cat, "alternateexts");
1698                         if (!ast_strlen_zero(altexts)) {
1699                                 snprintf(tmp, sizeof(tmp), "%s,1", cat);
1700                                 ast_copy_string(altcopy, altexts, sizeof(altcopy));
1701                                 c = altcopy;
1702                                 ext = strsep(&c, ",");
1703                                 while (ext) {
1704                                         ast_add_extension2(con, 0, ext, 1, NULL, NULL, "Goto", strdup(tmp), ast_free_ptr, registrar);
1705                                         ext = strsep(&c, ",");
1706                                 }
1707                         }
1708                 }
1709         }
1710         ast_config_destroy(cfg);
1711 }
1712
1713 static int pbx_load_module(void)
1714 {
1715         struct ast_context *con;
1716
1717         if (!local_table)
1718                 local_table = ast_hashtab_create(17, ast_hashtab_compare_contexts, ast_hashtab_resize_java, ast_hashtab_newsize_java, ast_hashtab_hash_contexts, 0);
1719
1720         if (!pbx_load_config(config))
1721                 return AST_MODULE_LOAD_DECLINE;
1722
1723         pbx_load_users();
1724
1725         ast_merge_contexts_and_delete(&local_contexts, local_table, registrar);
1726         local_table = NULL; /* the local table has been moved into the global one. */
1727         local_contexts = NULL;
1728
1729         for (con = NULL; (con = ast_walk_contexts(con));)
1730                 ast_context_verify_includes(con);
1731
1732         pbx_set_overrideswitch(overrideswitch_config);
1733         pbx_set_autofallthrough(autofallthrough_config);
1734         pbx_set_extenpatternmatchnew(extenpatternmatchnew_config);
1735
1736         return AST_MODULE_LOAD_SUCCESS;
1737 }
1738
1739 static int load_module(void)
1740 {
1741         if (pbx_load_module())
1742                 return AST_MODULE_LOAD_DECLINE;
1743
1744         if (static_config && !write_protect_config)
1745                 ast_cli_register(&cli_dialplan_save);
1746         ast_cli_register_multiple(cli_pbx_config, ARRAY_LEN(cli_pbx_config));
1747
1748         return AST_MODULE_LOAD_SUCCESS;
1749 }
1750
1751 static int reload(void)
1752 {
1753         if (clearglobalvars_config)
1754                 pbx_builtin_clear_globals();
1755         return pbx_load_module();
1756 }
1757
1758 AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "Text Extension Configuration",
1759                 .load = load_module,
1760                 .unload = unload_module,
1761                 .reload = reload,
1762                );