2 * Asterisk -- An open source telephony toolkit.
4 * Copyright (C) 1999 - 2005, Digium, Inc.
6 * Mark Spencer <markster@digium.com>
7 * See http://www.asterisk.org for more information about
8 * the Asterisk project. Please do not directly contact
9 * any of the maintainers of this project for assistance;
10 * the project provides a web site, mailing lists and IRC
11 * channels for your use.
13 * This program is free software, distributed under the terms of
14 * the GNU General Public License Version 2. See the LICENSE file
15 * at the top of the source tree.
19 * \brief Application convenience functions, designed to give consistent
20 * look and feel to Asterisk apps.
23 #ifndef _ASTERISK_APP_H
24 #define _ASTERISK_APP_H
28 #if defined(__cplusplus) || defined(c_plusplus)
34 /*! \brief Callback function for IVR
35 \return returns 0 on completion, -1 on hangup or digit if interrupted
37 typedef int (*ast_ivr_callback)(struct ast_channel *chan, char *option, void *cbdata);
40 AST_ACTION_UPONE, /*!< adata is unused */
41 AST_ACTION_EXIT, /*!< adata is the return value for ast_ivr_menu_run if channel was not hungup */
42 AST_ACTION_CALLBACK, /*!< adata is an ast_ivr_callback */
43 AST_ACTION_PLAYBACK, /*!< adata is file to play */
44 AST_ACTION_BACKGROUND, /*!< adata is file to play */
45 AST_ACTION_PLAYLIST, /*!< adata is list of files, separated by ; to play */
46 AST_ACTION_MENU, /*!< adata is a pointer to an ast_ivr_menu */
47 AST_ACTION_REPEAT, /*!< adata is max # of repeats, cast to a pointer */
48 AST_ACTION_RESTART, /*!< adata is like repeat, but resets repeats to 0 */
49 AST_ACTION_TRANSFER, /*!< adata is a string with exten\verbatim[@context]\endverbatim */
50 AST_ACTION_WAITOPTION, /*!< adata is a timeout, or 0 for defaults */
51 AST_ACTION_NOOP, /*!< adata is unused */
52 AST_ACTION_BACKLIST, /*!< adata is list of files separated by ; allows interruption */
56 Special "options" are:
57 \arg "s" - "start here (one time greeting)"
58 \arg "g" - "greeting/instructions"
61 \arg "i" - "invalid selection"
64 struct ast_ivr_option {
66 ast_ivr_action action;
71 char *title; /*!< Title of menu */
72 unsigned int flags; /*!< Flags */
73 struct ast_ivr_option *options; /*!< All options */
76 #define AST_IVR_FLAG_AUTORESTART (1 << 0)
78 #define AST_IVR_DECLARE_MENU(holder, title, flags, foo...) \
79 static struct ast_ivr_option __options_##holder[] = foo;\
80 static struct ast_ivr_menu holder = { title, flags, __options_##holder }
83 /*! \brief Runs an IVR menu
84 \return returns 0 on successful completion, -1 on hangup, or -2 on user error in menu */
85 int ast_ivr_menu_run(struct ast_channel *c, struct ast_ivr_menu *menu, void *cbdata);
87 /*! \brief Plays a stream and gets DTMF data from a channel
88 * \param c Which channel one is interacting with
89 * \param prompt File to pass to ast_streamfile (the one that you wish to play).
90 * It is also valid for this to be multiple files concatenated by "&".
91 * For example, "file1&file2&file3".
92 * \param s The location where the DTMF data will be stored
93 * \param maxlen Max Length of the data
94 * \param timeout Timeout length waiting for data(in milliseconds). Set to 0 for standard timeout(six seconds), or -1 for no time out.
96 * This function was designed for application programmers for situations where they need
97 * to play a message and then get some DTMF data in response to the message. If a digit
98 * is pressed during playback, it will immediately break out of the message and continue
99 * execution of your code.
101 int ast_app_getdata(struct ast_channel *c, const char *prompt, char *s, int maxlen, int timeout);
103 /*! \brief Full version with audiofd and controlfd. NOTE: returns '2' on ctrlfd available, not '1' like other full functions */
104 int ast_app_getdata_full(struct ast_channel *c, char *prompt, char *s, int maxlen, int timeout, int audiofd, int ctrlfd);
106 void ast_install_vm_functions(int (*has_voicemail_func)(const char *mailbox, const char *folder),
107 int (*inboxcount_func)(const char *mailbox, int *newmsgs, int *oldmsgs),
108 int (*messagecount_func)(const char *context, const char *mailbox, const char *folder));
110 void ast_uninstall_vm_functions(void);
112 /*! \brief Determine if a given mailbox has any voicemail */
113 int ast_app_has_voicemail(const char *mailbox, const char *folder);
115 /*! \brief Determine number of new/old messages in a mailbox */
116 int ast_app_inboxcount(const char *mailbox, int *newmsgs, int *oldmsgs);
118 /*! \brief Determine number of messages in a given mailbox and folder */
119 int ast_app_messagecount(const char *context, const char *mailbox, const char *folder);
121 /*! \brief Safely spawn an external program while closing file descriptors
122 \note This replaces the \b system call in all Asterisk modules
124 int ast_safe_system(const char *s);
127 * \brief Replace the SIGCHLD handler
129 * Normally, Asterisk has a SIGCHLD handler that is cleaning up all zombie
130 * processes from forking elsewhere in Asterisk. However, if you want to
131 * wait*() on the process to retrieve information about it's exit status,
132 * then this signal handler needs to be temporarily replaced.
134 * Code that executes this function *must* call ast_unreplace_sigchld()
135 * after it is finished doing the wait*().
137 void ast_replace_sigchld(void);
140 * \brief Restore the SIGCHLD handler
142 * This function is called after a call to ast_replace_sigchld. It restores
143 * the SIGCHLD handler that cleans up any zombie processes.
145 void ast_unreplace_sigchld(void);
148 \brief Send DTMF to a channel
150 \param chan The channel that will receive the DTMF frames
151 \param peer (optional) Peer channel that will be autoserviced while the
152 primary channel is receiving DTMF
153 \param digits This is a string of characters representing the DTMF digits
154 to be sent to the channel. Valid characters are
155 "0123456789*#abcdABCD". Note: You can pass arguments 'f' or
156 'F', if you want to Flash the channel (if supported by the
157 channel), or 'w' to add a 500 millisecond pause to the DTMF
159 \param between This is the number of milliseconds to wait in between each
160 DTMF digit. If zero milliseconds is specified, then the
161 default value of 100 will be used.
162 \param duration This is the duration that each DTMF digit should have.
164 int ast_dtmf_stream(struct ast_channel *chan, struct ast_channel *peer, const char *digits, int between, unsigned int duration);
166 /*! \brief Stream a filename (or file descriptor) as a generator. */
167 int ast_linear_stream(struct ast_channel *chan, const char *filename, int fd, int allowoverride);
170 * \brief Stream a file with fast forward, pause, reverse, restart.
172 * \param file filename
173 * \param fwd, rev, stop, pause, restart, skipms, offsetms
175 * Before calling this function, set this to be the number
176 * of ms to start from the beginning of the file. When the function
177 * returns, it will be the number of ms from the beginning where the
178 * playback stopped. Pass NULL if you don't care.
180 int ast_control_streamfile(struct ast_channel *chan, const char *file, const char *fwd, const char *rev, const char *stop, const char *pause, const char *restart, int skipms, long *offsetms);
182 /*! \brief Play a stream and wait for a digit, returning the digit that was pressed */
183 int ast_play_and_wait(struct ast_channel *chan, const char *fn);
185 int ast_play_and_record_full(struct ast_channel *chan, const char *playfile, const char *recordfile, int maxtime_sec, const char *fmt, int *duration, int silencethreshold, int maxsilence_ms, const char *path, const char *acceptdtmf, const char *canceldtmf);
187 /*! \brief Record a file for a max amount of time (in seconds), in a given list of formats separated by '|', outputting the duration of the recording, and with a maximum
189 permitted silence time in milliseconds of 'maxsilence' under 'silencethreshold' or use '-1' for either or both parameters for defaults.
190 calls ast_unlock_path() on 'path' if passed */
191 int ast_play_and_record(struct ast_channel *chan, const char *playfile, const char *recordfile, int maxtime_sec, const char *fmt, int *duration, int silencethreshold, int maxsilence_ms, const char *path);
193 /*! \brief Record a message and prepend the message to the given record file after
194 playing the optional playfile (or a beep), storing the duration in
195 'duration' and with a maximum permitted silence time in milliseconds of 'maxsilence' under
196 'silencethreshold' or use '-1' for either or both parameters for defaults. */
197 int ast_play_and_prepend(struct ast_channel *chan, char *playfile, char *recordfile, int maxtime_sec, char *fmt, int *duration, int beep, int silencethreshold, int maxsilence_ms);
199 enum AST_LOCK_RESULT {
200 AST_LOCK_SUCCESS = 0,
201 AST_LOCK_TIMEOUT = -1,
202 AST_LOCK_PATH_NOT_FOUND = -2,
203 AST_LOCK_FAILURE = -3,
206 /*! \brief Type of locking to use in ast_lock_path / ast_unlock_path */
208 AST_LOCK_TYPE_LOCKFILE = 0,
209 AST_LOCK_TYPE_FLOCK = 1,
213 * \brief Set the type of locks used by ast_lock_path()
214 * \param type the locking type to use
216 void ast_set_lock_type(enum AST_LOCK_TYPE type);
219 * \brief Lock a filesystem path.
220 * \param path the path to be locked
221 * \return one of \ref AST_LOCK_RESULT values
223 enum AST_LOCK_RESULT ast_lock_path(const char *path);
225 /*! \brief Unlock a path */
226 int ast_unlock_path(const char *path);
228 /*! \brief Read a file into asterisk*/
229 char *ast_read_textfile(const char *file);
231 struct ast_group_info;
233 /*! \brief Split a group string into group and category, returning a default category if none is provided. */
234 int ast_app_group_split_group(const char *data, char *group, int group_max, char *category, int category_max);
236 /*! \brief Set the group for a channel, splitting the provided data into group and category, if specified. */
237 int ast_app_group_set_channel(struct ast_channel *chan, const char *data);
239 /*! \brief Get the current channel count of the specified group and category. */
240 int ast_app_group_get_count(const char *group, const char *category);
242 /*! \brief Get the current channel count of all groups that match the specified pattern and category. */
243 int ast_app_group_match_get_count(const char *groupmatch, const char *category);
245 /*! \brief Discard all group counting for a channel */
246 int ast_app_group_discard(struct ast_channel *chan);
248 /*! \brief Update all group counting for a channel to a new one */
249 int ast_app_group_update(struct ast_channel *oldchan, struct ast_channel *newchan);
251 /*! \brief Write Lock the group count list */
252 int ast_app_group_list_wrlock(void);
254 /*! \brief Read Lock the group count list */
255 int ast_app_group_list_rdlock(void);
257 /*! \brief Get the head of the group count list */
258 struct ast_group_info *ast_app_group_list_head(void);
260 /*! \brief Unlock the group count list */
261 int ast_app_group_list_unlock(void);
264 \brief Define an application argument
265 \param name The name of the argument
267 #define AST_APP_ARG(name) char *name
270 \brief Declare a structure to hold the application's arguments.
271 \param name The name of the structure
272 \param arglist The list of arguments, defined using AST_APP_ARG
274 This macro defines a structure intended to be used in a call
275 to ast_app_separate_args(). The structure includes all the
276 arguments specified, plus an argv array that overlays them and an
277 argc argument counter. The arguments must be declared using AST_APP_ARG,
278 and they will all be character pointers (strings).
280 \note The structure is <b>not</b> initialized, as the call to
281 ast_app_separate_args() will perform that function before parsing
284 #define AST_DECLARE_APP_ARGS(name, arglist) \
292 \brief Performs the 'standard' argument separation process for an application.
293 \param args An argument structure defined using AST_DECLARE_APP_ARGS
294 \param parse A modifiable buffer containing the input to be parsed
296 This function will separate the input string using the standard argument
297 separator character ',' and fill in the provided structure, including
298 the argc argument counter field.
300 #define AST_STANDARD_APP_ARGS(args, parse) \
301 args.argc = ast_app_separate_args(parse, ',', args.argv, (sizeof(args) - sizeof(args.argc)) / sizeof(args.argv[0]))
304 \brief Performs the 'nonstandard' argument separation process for an application.
305 \param args An argument structure defined using AST_DECLARE_APP_ARGS
306 \param parse A modifiable buffer containing the input to be parsed
307 \param sep A nonstandard separator character
309 This function will separate the input string using the nonstandard argument
310 separator character and fill in the provided structure, including
311 the argc argument counter field.
313 #define AST_NONSTANDARD_APP_ARGS(args, parse, sep) \
314 args.argc = ast_app_separate_args(parse, sep, args.argv, (sizeof(args) - sizeof(args.argc)) / sizeof(args.argv[0]))
317 \brief Separate a string into arguments in an array
318 \param buf The string to be parsed (this must be a writable copy, as it will be modified)
319 \param delim The character to be used to delimit arguments
320 \param array An array of 'char *' to be filled in with pointers to the found arguments
321 \param arraylen The number of elements in the array (i.e. the number of arguments you will accept)
323 Note: if there are more arguments in the string than the array will hold, the last element of
324 the array will contain the remaining arguments, not separated.
326 The array will be completely zeroed by this function before it populates any entries.
328 \return The number of arguments found, or zero if the function arguments are not valid.
330 unsigned int ast_app_separate_args(char *buf, char delim, char **array, int arraylen);
333 \brief A structure to hold the description of an application 'option'.
335 Application 'options' are single-character flags that can be supplied
336 to the application to affect its behavior; they can also optionally
337 accept arguments enclosed in parenthesis.
339 These structures are used by the ast_app_parse_options function, uses
340 this data to fill in a flags structure (to indicate which options were
341 supplied) and array of argument pointers (for those options that had
344 struct ast_app_option {
345 /*! \brief The flag bit that represents this option. */
347 /*! \brief The index of the entry in the arguments array
348 that should be used for this option's argument. */
349 unsigned int arg_index;
352 #define BEGIN_OPTIONS {
353 #define END_OPTIONS }
356 \brief Declares an array of options for an application.
357 \param holder The name of the array to be created
358 \param options The actual options to be placed into the array
359 \sa ast_app_parse_options
361 This macro declares a 'static const' array of \c struct \c ast_option
362 elements to hold the list of available options for an application.
363 Each option must be declared using either the AST_APP_OPTION()
364 or AST_APP_OPTION_ARG() macros.
371 OPT_BLORT = (1 << 2),
372 } my_app_option_flags;
377 !! this entry tells how many possible arguments there are,
378 and must be the last entry in the list
380 } my_app_option_args;
382 AST_APP_OPTIONS(my_app_options, {
383 AST_APP_OPTION('j', OPT_JUMP),
384 AST_APP_OPTION_ARG('b', OPT_BLAH, OPT_ARG_BLAH),
385 AST_APP_OPTION_BLORT('B', OPT_BLORT, OPT_ARG_BLORT),
388 static int my_app_exec(struct ast_channel *chan, void *data)
391 struct ast_flags opts = { 0, };
392 char *opt_args[OPT_ARG_ARRAY_SIZE];
394 ... do any argument parsing here ...
396 if (ast_parseoptions(my_app_options, &opts, opt_args, options)) {
397 ast_module_user_remove(u);
403 #define AST_APP_OPTIONS(holder, options...) \
404 static const struct ast_app_option holder[128] = options
407 \brief Declares an application option that does not accept an argument.
408 \param option The single character representing the option
409 \param flagno The flag index to be set if this option is present
410 \sa AST_APP_OPTIONS, ast_app_parse_options
412 #define AST_APP_OPTION(option, flagno) \
413 [option] = { .flag = flagno }
416 \brief Declares an application option that accepts an argument.
417 \param option The single character representing the option
418 \param flagno The flag index to be set if this option is present
419 \param argno The index into the argument array where the argument should
421 \sa AST_APP_OPTIONS, ast_app_parse_options
423 #define AST_APP_OPTION_ARG(option, flagno, argno) \
424 [option] = { .flag = flagno, .arg_index = argno + 1 }
427 \brief Parses a string containing application options and sets flags/arguments.
428 \param options The array of possible options declared with AST_APP_OPTIONS
429 \param flags The flag structure to have option flags set
430 \param args The array of argument pointers to hold arguments found
431 \param optstr The string containing the options to be parsed
432 \return zero for success, non-zero if an error occurs
435 int ast_app_parse_options(const struct ast_app_option *options, struct ast_flags *flags, char **args, char *optstr);
438 \brief Parses a string containing application options and sets flags/arguments.
439 \param options The array of possible options declared with AST_APP_OPTIONS
440 \param flags The 64-bit flag structure to have option flags set
441 \param args The array of argument pointers to hold arguments found
442 \param optstr The string containing the options to be parsed
443 \return zero for success, non-zero if an error occurs
446 int ast_app_parse_options64(const struct ast_app_option *options, struct ast_flags64 *flags, char **args, char *optstr);
448 /*! \brief Present a dialtone and collect a certain length extension.
449 \return Returns 1 on valid extension entered, -1 on hangup, or 0 on invalid extension.
450 \note Note that if 'collect' holds digits already, new digits will be appended, so be sure it's initialized properly */
451 int ast_app_dtget(struct ast_channel *chan, const char *context, char *collect, size_t size, int maxlen, int timeout);
453 /*! \brief Allow to record message and have a review option */
454 int ast_record_review(struct ast_channel *chan, const char *playfile, const char *recordfile, int maxtime, const char *fmt, int *duration, const char *path);
456 /*! \brief Decode an encoded control or extended ASCII character */
457 int ast_get_encoded_char(const char *stream, char *result, size_t *consumed);
459 #if defined(__cplusplus) || defined(c_plusplus)
463 #endif /* _ASTERISK_APP_H */