funcs/func_timeout.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 Channel timeout related dialplan functions
  22  *
  23  * \author Mark Spencer <markster@digium.com>
  24  */
  25
  26 #include "asterisk.h"
  27
  28 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
  29
  30 #include <stdlib.h>
  31 #include <stdio.h>
  32 #include <string.h>
  33 #include <sys/types.h>
  34
  35 #include "asterisk/module.h"
  36 #include "asterisk/channel.h"
  37 #include "asterisk/pbx.h"
  38 #include "asterisk/logger.h"
  39 #include "asterisk/utils.h"
  40 #include "asterisk/app.h"
  41 #include "asterisk/options.h"
  42
  43 static int timeout_read(struct ast_channel *chan, char *cmd, char *data,
  44                         char *buf, size_t len)
  45 {
  46         time_t myt;
  47
  48         if (!chan)
  49                 return -1;
  50
  51         if (!data) {
  52                 ast_log(LOG_ERROR, "Must specify type of timeout to get.\n");
  53                 return -1;
  54         }
  55
  56         switch (*data) {
  57         case 'a':
  58         case 'A':
  59                 if (chan->whentohangup == 0) {
  60                         ast_copy_string(buf, "0", len);
  61                 } else {
  62                         time(&myt);
  63                         snprintf(buf, len, "%d", (int) (chan->whentohangup - myt));
  64                 }
  65                 break;
  66
  67         case 'r':
  68         case 'R':
  69                 if (chan->pbx) {
  70                         snprintf(buf, len, "%d", chan->pbx->rtimeout);
  71                 }
  72                 break;
  73
  74         case 'd':
  75         case 'D':
  76                 if (chan->pbx) {
  77                         snprintf(buf, len, "%d", chan->pbx->dtimeout);
  78                 }
  79                 break;
  80
  81         default:
  82                 ast_log(LOG_ERROR, "Unknown timeout type specified.\n");
  83                 return -1;
  84         }
  85
  86         return 0;
  87 }
  88
  89 static int timeout_write(struct ast_channel *chan, char *cmd, char *data,
  90                          const char *value)
  91 {
  92         int x;
  93         char timestr[64];
  94         struct tm myt;
  95
  96         if (!chan)
  97                 return -1;
  98
  99         if (!data) {
 100                 ast_log(LOG_ERROR, "Must specify type of timeout to set.\n");
 101                 return -1;
 102         }
 103
 104         if (!value)
 105                 return -1;
 106
 107         x = atoi(value);
 108         if (x < 0)
 109                 x = 0;
 110
 111         switch (*data) {
 112         case 'a':
 113         case 'A':
 114                 ast_channel_setwhentohangup(chan, x);
 115                 if (option_verbose > 2) {
 116                         if (chan->whentohangup) {
 117                                 strftime(timestr, sizeof(timestr), "%Y-%m-%d %H:%M:%S UTC",
 118                                          gmtime_r(&chan->whentohangup, &myt));
 119                                 ast_verbose(VERBOSE_PREFIX_3 "Channel will hangup at %s.\n",
 120                                             timestr);
 121                         } else {
 122                                 ast_verbose(VERBOSE_PREFIX_3 "Channel hangup cancelled.\n");
 123                         }
 124                 }
 125                 break;
 126
 127         case 'r':
 128         case 'R':
 129                 if (chan->pbx) {
 130                         chan->pbx->rtimeout = x;
 131                         if (option_verbose > 2)
 132                                 ast_verbose(VERBOSE_PREFIX_3 "Response timeout set to %d\n",
 133                                             chan->pbx->rtimeout);
 134                 }
 135                 break;
 136
 137         case 'd':
 138         case 'D':
 139                 if (chan->pbx) {
 140                         chan->pbx->dtimeout = x;
 141                         if (option_verbose > 2)
 142                                 ast_verbose(VERBOSE_PREFIX_3 "Digit timeout set to %d\n",
 143                                             chan->pbx->dtimeout);
 144                 }
 145                 break;
 146
 147         default:
 148                 ast_log(LOG_ERROR, "Unknown timeout type specified.\n");
 149                 break;
 150         }
 151
 152         return 0;
 153 }
 154
 155 static struct ast_custom_function timeout_function = {
 156         .name = "TIMEOUT",
 157         .synopsis = "Gets or sets timeouts on the channel.",
 158         .syntax = "TIMEOUT(timeouttype)",
 159         .desc =
 160                 "Gets or sets various channel timeouts. The timeouts that can be\n"
 161                 "manipulated are:\n" "\n"
 162                 "absolute: The absolute maximum amount of time permitted for a call.  A\n"
 163                 "          setting of 0 disables the timeout.\n" "\n"
 164                 "digit:    The maximum amount of time permitted between digits when the\n"
 165                 "          user is typing in an extension.  When this timeout expires,\n"
 166                 "          after the user has started to type in an extension, the\n"
 167                 "          extension will be considered complete, and will be\n"
 168                 "          interpreted.  Note that if an extension typed in is valid,\n"
 169                 "          it will not have to timeout to be tested, so typically at\n"
 170                 "          the expiry of this timeout, the extension will be considered\n"
 171                 "          invalid (and thus control would be passed to the 'i'\n"
 172                 "          extension, or if it doesn't exist the call would be\n"
 173                 "          terminated).  The default timeout is 5 seconds.\n" "\n"
 174                 "response: The maximum amount of time permitted after falling through a\n"
 175                 "          series of priorities for a channel in which the user may\n"
 176                 "          begin typing an extension.  If the user does not type an\n"
 177                 "          extension in this amount of time, control will pass to the\n"
 178                 "          't' extension if it exists, and if not the call would be\n"
 179                 "          terminated.  The default timeout is 10 seconds.\n",
 180         .read = timeout_read,
 181         .write = timeout_write,
 182 };
 183
 184 static int unload_module(void)
 185 {
 186         return ast_custom_function_unregister(&timeout_function);
 187 }
 188
 189 static int load_module(void)
 190 {
 191         return ast_custom_function_register(&timeout_function);
 192 }
 193
 194 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Channel timeout dialplan functions");