Mon Mar 12 2012 21:24:37

Asterisk developer's documentation


app_readexten.c File Reference

Trivial application to read an extension into a variable. More...

#include "asterisk.h"
#include "asterisk/file.h"
#include "asterisk/pbx.h"
#include "asterisk/app.h"
#include "asterisk/module.h"
#include "asterisk/indications.h"
#include "asterisk/channel.h"
Include dependency graph for app_readexten.c:

Go to the source code of this file.

Enumerations

enum  readexten_option_flags { OPT_SKIP = (1 << 0), OPT_INDICATION = (1 << 1), OPT_NOANSWER = (1 << 2) }

Functions

static void __reg_module (void)
static void __unreg_module (void)
static int acf_isexten_exec (struct ast_channel *chan, const char *cmd, char *parse, char *buffer, size_t buflen)
static int load_module (void)
static int readexten_exec (struct ast_channel *chan, const char *data)
static int unload_module (void)

Variables

static struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "Read and evaluate extension validity" , .key = "This paragraph is copyright (c) 2006 by Digium, Inc. \In order for your module to load, it must return this \key via a function called \"key\". Any code which \includes this paragraph must be licensed under the GNU \General Public License version 2 or later (at your \option). In addition to Digium's general reservations \of rights, Digium expressly reserves the right to \allow other parties to license this paragraph under \different terms. Any use of Digium, Inc. trademarks or \logos (including \"Asterisk\" or \"Digium\") without \express written permission of Digium, Inc. is prohibited.\n" , .buildopt_sum = AST_BUILDOPT_SUM, .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_DEFAULT, }
static struct ast_custom_function acf_isexten
static char * app = "ReadExten"
static struct ast_module_infoast_module_info = &__mod_info
static struct ast_app_option readexten_app_options [128] = { [ 's' ] = { .flag = OPT_SKIP }, [ 'i' ] = { .flag = OPT_INDICATION }, [ 'n' ] = { .flag = OPT_NOANSWER },}

Detailed Description

Trivial application to read an extension into a variable.

Author:
David Chappell <David.Chappell@trincoll.edu>

Definition in file app_readexten.c.


Enumeration Type Documentation

Enumerator:
OPT_SKIP 
OPT_INDICATION 
OPT_NOANSWER 

Definition at line 119 of file app_readexten.c.

                            {
   OPT_SKIP = (1 << 0),
   OPT_INDICATION = (1 << 1),
   OPT_NOANSWER = (1 << 2),
};

Function Documentation

static void __reg_module ( void  ) [static]

Definition at line 337 of file app_readexten.c.

static void __unreg_module ( void  ) [static]

Definition at line 337 of file app_readexten.c.

static int acf_isexten_exec ( struct ast_channel chan,
const char *  cmd,
char *  parse,
char *  buffer,
size_t  buflen 
) [static]

Definition at line 283 of file app_readexten.c.

References args, AST_APP_ARG, ast_copy_string(), AST_DECLARE_APP_ARGS, ast_exists_extension(), ast_log(), AST_STANDARD_APP_ARGS, ast_strlen_zero(), ast_channel::caller, context, ast_channel::context, ast_party_caller::id, LOG_WARNING, ast_party_id::number, S_COR, ast_party_number::str, and ast_party_number::valid.

{
   int priority_int;
   AST_DECLARE_APP_ARGS(args,
      AST_APP_ARG(context);
      AST_APP_ARG(extension);
      AST_APP_ARG(priority);
   );

   AST_STANDARD_APP_ARGS(args, parse);

   if (ast_strlen_zero(args.context))
      args.context = chan->context;

   if (ast_strlen_zero(args.extension)) {
      ast_log(LOG_WARNING, "Syntax: VALID_EXTEN([<context>],<extension>[,<priority>]) - missing argument <extension>!\n");
      return -1;
   }

   if (ast_strlen_zero(args.priority))
      priority_int = 1;
   else
      priority_int = atoi(args.priority);

   if (ast_exists_extension(chan, args.context, args.extension, priority_int,
      S_COR(chan->caller.id.number.valid, chan->caller.id.number.str, NULL))) {
       ast_copy_string(buffer, "1", buflen);
   } else {
       ast_copy_string(buffer, "0", buflen);
   }

   return 0;
}
static int load_module ( void  ) [static]
static int readexten_exec ( struct ast_channel chan,
const char *  data 
) [static]

Definition at line 133 of file app_readexten.c.

References ast_channel::_state, ast_answer(), AST_APP_ARG, ast_app_parse_options(), ast_check_hangup(), ast_debug, AST_DECLARE_APP_ARGS, ast_exists_extension(), ast_fileexists(), ast_get_indication_tone(), ast_log(), ast_matchmore_extension(), ast_playtones_start(), ast_playtones_stop(), AST_STANDARD_APP_ARGS, AST_STATE_UP, ast_stopstream(), ast_strdupa, ast_streamfile(), ast_strlen_zero(), ast_test_flag, ast_tone_zone_sound_unref(), ast_waitfordigit(), ast_channel::caller, context, ast_channel::context, ast_tone_zone_sound::data, ast_pbx::dtimeoutms, exten, ast_party_caller::id, ast_channel::language, LOG_WARNING, ast_channel::name, ast_party_id::number, OPT_INDICATION, OPT_NOANSWER, OPT_SKIP, ast_channel::pbx, pbx_builtin_setvar_helper(), readexten_app_options, ast_pbx::rtimeoutms, S_COR, status, ast_party_number::str, ast_party_number::valid, and ast_channel::zone.

Referenced by load_module().

{
   int res = 0;
   char exten[256] = "";
   int maxdigits = sizeof(exten) - 1;
   int timeout = 0, digit_timeout = 0, x = 0;
   char *argcopy = NULL, *status = "";
   struct ast_tone_zone_sound *ts = NULL;
   struct ast_flags flags = {0};

    AST_DECLARE_APP_ARGS(arglist,
      AST_APP_ARG(variable);
      AST_APP_ARG(filename);
      AST_APP_ARG(context);
      AST_APP_ARG(options);
      AST_APP_ARG(timeout);
   );
   
   if (ast_strlen_zero(data)) {
      ast_log(LOG_WARNING, "ReadExten requires at least one argument\n");
      pbx_builtin_setvar_helper(chan, "READEXTENSTATUS", "ERROR");
      return 0;
   }

   argcopy = ast_strdupa(data);
   AST_STANDARD_APP_ARGS(arglist, argcopy);

   if (ast_strlen_zero(arglist.variable)) {
      ast_log(LOG_WARNING, "Usage: ReadExten(variable[,filename[,context[,options[,timeout]]]])\n");
      pbx_builtin_setvar_helper(chan, "READEXTENSTATUS", "ERROR");
      return 0;
   }

   if (ast_strlen_zero(arglist.filename))
      arglist.filename = NULL;

   if (ast_strlen_zero(arglist.context))
      arglist.context = chan->context;

   if (!ast_strlen_zero(arglist.options))
      ast_app_parse_options(readexten_app_options, &flags, NULL, arglist.options);

   if (!ast_strlen_zero(arglist.timeout)) {
      timeout = atoi(arglist.timeout);
      if (timeout > 0)
         timeout *= 1000;
   }

   if (timeout <= 0)
      timeout = chan->pbx ? chan->pbx->rtimeoutms : 10000;

   if (digit_timeout <= 0)
      digit_timeout = chan->pbx ? chan->pbx->dtimeoutms : 5000;

   if (ast_test_flag(&flags, OPT_INDICATION) && !ast_strlen_zero(arglist.filename)) {
      ts = ast_get_indication_tone(chan->zone, arglist.filename);
   }

   do {
      if (chan->_state != AST_STATE_UP) {
         if (ast_test_flag(&flags, OPT_SKIP)) {
            /* At the user's option, skip if the line is not up */
            pbx_builtin_setvar_helper(chan, arglist.variable, "");
            status = "SKIP";
            break;
         } else if (!ast_test_flag(&flags, OPT_NOANSWER)) {
            /* Otherwise answer unless we're supposed to read while on-hook */
            res = ast_answer(chan);
         }
      }

      if (res < 0) {
         status = "HANGUP";
         break;
      }

      ast_playtones_stop(chan);
      ast_stopstream(chan);

      if (ts && ts->data[0]) {
         res = ast_playtones_start(chan, 0, ts->data, 0);
      } else if (arglist.filename) {
         if (ast_test_flag(&flags, OPT_INDICATION) && ast_fileexists(arglist.filename, NULL, chan->language) <= 0) {
            /*
             * We were asked to play an indication that did not exist in the config.
             * If no such file exists, play it as a tonelist.  With any luck they won't
             * have a file named "350+440.ulaw"
             * (but honestly, who would do something so silly?)
             */
            res = ast_playtones_start(chan, 0, arglist.filename, 0);
         } else {
            res = ast_streamfile(chan, arglist.filename, chan->language);
         }
      }

      for (x = 0; x < maxdigits; x++) {
         ast_debug(3, "extension so far: '%s', timeout: %d\n", exten, timeout);
         res = ast_waitfordigit(chan, timeout);

         ast_playtones_stop(chan);
         ast_stopstream(chan);
         timeout = digit_timeout;

         if (res < 1) {    /* timeout expired or hangup */
            if (ast_check_hangup(chan)) {
               status = "HANGUP";
            } else if (x == 0) {
               pbx_builtin_setvar_helper(chan, arglist.variable, "t");
               status = "TIMEOUT";
            }
            break;
         }

         exten[x] = res;
         if (!ast_matchmore_extension(chan, arglist.context, exten, 1 /* priority */,
            S_COR(chan->caller.id.number.valid, chan->caller.id.number.str, NULL))) {
            if (!ast_exists_extension(chan, arglist.context, exten, 1,
               S_COR(chan->caller.id.number.valid, chan->caller.id.number.str, NULL))
               && res == '#') {
               exten[x] = '\0';
            }
            break;
         }
      }

      if (!ast_strlen_zero(status))
         break;

      if (ast_exists_extension(chan, arglist.context, exten, 1,
         S_COR(chan->caller.id.number.valid, chan->caller.id.number.str, NULL))) {
         ast_debug(3, "User entered valid extension '%s'\n", exten);
         pbx_builtin_setvar_helper(chan, arglist.variable, exten);
         status = "OK";
      } else {
         ast_debug(3, "User dialed invalid extension '%s' in context '%s' on %s\n", exten, arglist.context, chan->name);
         pbx_builtin_setvar_helper(chan, arglist.variable, "i");
         pbx_builtin_setvar_helper(chan, "INVALID_EXTEN", exten);
         status = "INVALID";
      }
   } while (0);

   if (ts) {
      ts = ast_tone_zone_sound_unref(ts);
   }

   pbx_builtin_setvar_helper(chan, "READEXTENSTATUS", status);

   return status[0] == 'H' ? -1 : 0;
}
static int unload_module ( void  ) [static]

Variable Documentation

struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "Read and evaluate extension validity" , .key = "This paragraph is copyright (c) 2006 by Digium, Inc. \In order for your module to load, it must return this \key via a function called \"key\". Any code which \includes this paragraph must be licensed under the GNU \General Public License version 2 or later (at your \option). In addition to Digium's general reservations \of rights, Digium expressly reserves the right to \allow other parties to license this paragraph under \different terms. Any use of Digium, Inc. trademarks or \logos (including \"Asterisk\" or \"Digium\") without \express written permission of Digium, Inc. is prohibited.\n" , .buildopt_sum = AST_BUILDOPT_SUM, .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_DEFAULT, } [static]

Definition at line 337 of file app_readexten.c.

Initial value:
 {
   .name = "VALID_EXTEN",
   .read = acf_isexten_exec,
}

Definition at line 317 of file app_readexten.c.

char* app = "ReadExten" [static]

Definition at line 131 of file app_readexten.c.

Definition at line 337 of file app_readexten.c.

struct ast_app_option readexten_app_options[128] = { [ 's' ] = { .flag = OPT_SKIP }, [ 'i' ] = { .flag = OPT_INDICATION }, [ 'n' ] = { .flag = OPT_NOANSWER },} [static]

Definition at line 129 of file app_readexten.c.

Referenced by readexten_exec().