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
26 #include "asterisk/strings.h"
27 #include "asterisk/threadstorage.h"
31 #if defined(__cplusplus) || defined(c_plusplus)
35 AST_THREADSTORAGE_EXTERNAL(global_app_buf);
39 /*! \brief Callback function for IVR
40 \return returns 0 on completion, -1 on hangup or digit if interrupted
42 typedef int (*ast_ivr_callback)(struct ast_channel *chan, char *option, void *cbdata);
45 AST_ACTION_UPONE, /*!< adata is unused */
46 AST_ACTION_EXIT, /*!< adata is the return value for ast_ivr_menu_run if channel was not hungup */
47 AST_ACTION_CALLBACK, /*!< adata is an ast_ivr_callback */
48 AST_ACTION_PLAYBACK, /*!< adata is file to play */
49 AST_ACTION_BACKGROUND, /*!< adata is file to play */
50 AST_ACTION_PLAYLIST, /*!< adata is list of files, separated by ; to play */
51 AST_ACTION_MENU, /*!< adata is a pointer to an ast_ivr_menu */
52 AST_ACTION_REPEAT, /*!< adata is max # of repeats, cast to a pointer */
53 AST_ACTION_RESTART, /*!< adata is like repeat, but resets repeats to 0 */
54 AST_ACTION_TRANSFER, /*!< adata is a string with exten\verbatim[@context]\endverbatim */
55 AST_ACTION_WAITOPTION, /*!< adata is a timeout, or 0 for defaults */
56 AST_ACTION_NOOP, /*!< adata is unused */
57 AST_ACTION_BACKLIST, /*!< adata is list of files separated by ; allows interruption */
61 Special "options" are:
62 \arg "s" - "start here (one time greeting)"
63 \arg "g" - "greeting/instructions"
66 \arg "i" - "invalid selection"
69 struct ast_ivr_option {
71 ast_ivr_action action;
76 char *title; /*!< Title of menu */
77 unsigned int flags; /*!< Flags */
78 struct ast_ivr_option *options; /*!< All options */
81 #define AST_IVR_FLAG_AUTORESTART (1 << 0)
83 #define AST_IVR_DECLARE_MENU(holder, title, flags, foo...) \
84 static struct ast_ivr_option __options_##holder[] = foo;\
85 static struct ast_ivr_menu holder = { title, flags, __options_##holder }
88 /*! \brief Runs an IVR menu
89 \return returns 0 on successful completion, -1 on hangup, or -2 on user error in menu */
90 int ast_ivr_menu_run(struct ast_channel *c, struct ast_ivr_menu *menu, void *cbdata);
92 /*! \brief Plays a stream and gets DTMF data from a channel
93 * \param c Which channel one is interacting with
94 * \param prompt File to pass to ast_streamfile (the one that you wish to play).
95 * It is also valid for this to be multiple files concatenated by "&".
96 * For example, "file1&file2&file3".
97 * \param s The location where the DTMF data will be stored
98 * \param maxlen Max Length of the data
99 * \param timeout Timeout length waiting for data(in milliseconds). Set to 0 for standard timeout(six seconds), or -1 for no time out.
101 * This function was designed for application programmers for situations where they need
102 * to play a message and then get some DTMF data in response to the message. If a digit
103 * is pressed during playback, it will immediately break out of the message and continue
104 * execution of your code.
106 int ast_app_getdata(struct ast_channel *c, const char *prompt, char *s, int maxlen, int timeout);
108 /*! \brief Full version with audiofd and controlfd. NOTE: returns '2' on ctrlfd available, not '1' like other full functions */
109 int ast_app_getdata_full(struct ast_channel *c, char *prompt, char *s, int maxlen, int timeout, int audiofd, int ctrlfd);
111 void ast_install_vm_functions(int (*has_voicemail_func)(const char *mailbox, const char *folder),
112 int (*inboxcount_func)(const char *mailbox, int *newmsgs, int *oldmsgs),
113 int (*inboxcount2_func)(const char *mailbox, int *urgentmsgs, int *newmsgs, int *oldmsgs),
114 int (*messagecount_func)(const char *context, const char *mailbox, const char *folder),
115 int (*sayname_func)(struct ast_channel *chan, const char *mailbox, const char *context));
117 void ast_uninstall_vm_functions(void);
119 /*! \brief Determine if a given mailbox has any voicemail */
120 int ast_app_has_voicemail(const char *mailbox, const char *folder);
122 /*! \brief Determine number of new/old messages in a mailbox */
123 int ast_app_inboxcount(const char *mailbox, int *newmsgs, int *oldmsgs);
125 /*! \brief Determine number of urgent/new/old messages in a mailbox */
126 int ast_app_inboxcount2(const char *mailbox, int *urgentmsgs, int *newmsgs, int *oldmsgs);
128 /*! Given a mailbox and context, play that mailbox owner's name to the channel specified */
129 int ast_app_sayname(struct ast_channel *chan, const char *mailbox, const char *context);
131 /*! \brief Determine number of messages in a given mailbox and folder */
132 int ast_app_messagecount(const char *context, const char *mailbox, const char *folder);
134 /*! \brief Safely spawn an external program while closing file descriptors
135 \note This replaces the \b system call in all Asterisk modules
137 int ast_safe_system(const char *s);
140 * \brief Replace the SIGCHLD handler
142 * Normally, Asterisk has a SIGCHLD handler that is cleaning up all zombie
143 * processes from forking elsewhere in Asterisk. However, if you want to
144 * wait*() on the process to retrieve information about it's exit status,
145 * then this signal handler needs to be temporarily replaced.
147 * Code that executes this function *must* call ast_unreplace_sigchld()
148 * after it is finished doing the wait*().
150 void ast_replace_sigchld(void);
153 * \brief Restore the SIGCHLD handler
155 * This function is called after a call to ast_replace_sigchld. It restores
156 * the SIGCHLD handler that cleans up any zombie processes.
158 void ast_unreplace_sigchld(void);
161 \brief Send DTMF to a channel
163 \param chan The channel that will receive the DTMF frames
164 \param peer (optional) Peer channel that will be autoserviced while the
165 primary channel is receiving DTMF
166 \param digits This is a string of characters representing the DTMF digits
167 to be sent to the channel. Valid characters are
168 "0123456789*#abcdABCD". Note: You can pass arguments 'f' or
169 'F', if you want to Flash the channel (if supported by the
170 channel), or 'w' to add a 500 millisecond pause to the DTMF
172 \param between This is the number of milliseconds to wait in between each
173 DTMF digit. If zero milliseconds is specified, then the
174 default value of 100 will be used.
175 \param duration This is the duration that each DTMF digit should have.
177 int ast_dtmf_stream(struct ast_channel *chan, struct ast_channel *peer, const char *digits, int between, unsigned int duration);
179 /*! \brief Stream a filename (or file descriptor) as a generator. */
180 int ast_linear_stream(struct ast_channel *chan, const char *filename, int fd, int allowoverride);
183 * \brief Stream a file with fast forward, pause, reverse, restart.
185 * \param file filename
186 * \param fwd, rev, stop, pause, restart, skipms, offsetms
188 * Before calling this function, set this to be the number
189 * of ms to start from the beginning of the file. When the function
190 * returns, it will be the number of ms from the beginning where the
191 * playback stopped. Pass NULL if you don't care.
193 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);
195 /*! \brief Play a stream and wait for a digit, returning the digit that was pressed */
196 int ast_play_and_wait(struct ast_channel *chan, const char *fn);
198 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);
200 /*! \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
202 permitted silence time in milliseconds of 'maxsilence' under 'silencethreshold' or use '-1' for either or both parameters for defaults.
203 calls ast_unlock_path() on 'path' if passed */
204 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);
206 /*! \brief Record a message and prepend the message to the given record file after
207 playing the optional playfile (or a beep), storing the duration in
208 'duration' and with a maximum permitted silence time in milliseconds of 'maxsilence' under
209 'silencethreshold' or use '-1' for either or both parameters for defaults. */
210 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);
212 enum AST_LOCK_RESULT {
213 AST_LOCK_SUCCESS = 0,
214 AST_LOCK_TIMEOUT = -1,
215 AST_LOCK_PATH_NOT_FOUND = -2,
216 AST_LOCK_FAILURE = -3,
219 /*! \brief Type of locking to use in ast_lock_path / ast_unlock_path */
221 AST_LOCK_TYPE_LOCKFILE = 0,
222 AST_LOCK_TYPE_FLOCK = 1,
226 * \brief Set the type of locks used by ast_lock_path()
227 * \param type the locking type to use
229 void ast_set_lock_type(enum AST_LOCK_TYPE type);
232 * \brief Lock a filesystem path.
233 * \param path the path to be locked
234 * \return one of \ref AST_LOCK_RESULT values
236 enum AST_LOCK_RESULT ast_lock_path(const char *path);
238 /*! \brief Unlock a path */
239 int ast_unlock_path(const char *path);
241 /*! \brief Read a file into asterisk*/
242 char *ast_read_textfile(const char *file);
244 struct ast_group_info;
246 /*! \brief Split a group string into group and category, returning a default category if none is provided. */
247 int ast_app_group_split_group(const char *data, char *group, int group_max, char *category, int category_max);
249 /*! \brief Set the group for a channel, splitting the provided data into group and category, if specified. */
250 int ast_app_group_set_channel(struct ast_channel *chan, const char *data);
252 /*! \brief Get the current channel count of the specified group and category. */
253 int ast_app_group_get_count(const char *group, const char *category);
255 /*! \brief Get the current channel count of all groups that match the specified pattern and category. */
256 int ast_app_group_match_get_count(const char *groupmatch, const char *category);
258 /*! \brief Discard all group counting for a channel */
259 int ast_app_group_discard(struct ast_channel *chan);
261 /*! \brief Update all group counting for a channel to a new one */
262 int ast_app_group_update(struct ast_channel *oldchan, struct ast_channel *newchan);
264 /*! \brief Write Lock the group count list */
265 int ast_app_group_list_wrlock(void);
267 /*! \brief Read Lock the group count list */
268 int ast_app_group_list_rdlock(void);
270 /*! \brief Get the head of the group count list */
271 struct ast_group_info *ast_app_group_list_head(void);
273 /*! \brief Unlock the group count list */
274 int ast_app_group_list_unlock(void);
277 \brief Define an application argument
278 \param name The name of the argument
280 #define AST_APP_ARG(name) char *name
283 \brief Declare a structure to hold an application's arguments.
284 \param name The name of the structure
285 \param arglist The list of arguments, defined using AST_APP_ARG
287 This macro declares a structure intended to be used in a call
288 to ast_app_separate_args(). The structure includes all the
289 arguments specified, plus an argv array that overlays them and an
290 argc argument counter. The arguments must be declared using AST_APP_ARG,
291 and they will all be character pointers (strings).
293 \note The structure is <b>not</b> initialized, as the call to
294 ast_app_separate_args() will perform that function before parsing
297 #define AST_DECLARE_APP_ARGS(name, arglist) AST_DEFINE_APP_ARGS_TYPE(, arglist) name
300 \brief Define a structure type to hold an application's arguments.
301 \param type The name of the structure type
302 \param arglist The list of arguments, defined using AST_APP_ARG
304 This macro defines a structure type intended to be used in a call
305 to ast_app_separate_args(). The structure includes all the
306 arguments specified, plus an argv array that overlays them and an
307 argc argument counter. The arguments must be declared using AST_APP_ARG,
308 and they will all be character pointers (strings).
310 \note This defines a structure type, but does not declare an instance
311 of the structure. That must be done separately.
313 #define AST_DEFINE_APP_ARGS_TYPE(type, arglist) \
321 \brief Performs the 'standard' argument separation process for an application.
322 \param args An argument structure defined using AST_DECLARE_APP_ARGS
323 \param parse A modifiable buffer containing the input to be parsed
325 This function will separate the input string using the standard argument
326 separator character ',' and fill in the provided structure, including
327 the argc argument counter field.
329 #define AST_STANDARD_APP_ARGS(args, parse) \
330 args.argc = ast_app_separate_args(parse, ',', args.argv, ((sizeof(args) - offsetof(typeof(args), argv)) / sizeof(args.argv[0])))
333 \brief Performs the 'nonstandard' argument separation process for an application.
334 \param args An argument structure defined using AST_DECLARE_APP_ARGS
335 \param parse A modifiable buffer containing the input to be parsed
336 \param sep A nonstandard separator character
338 This function will separate the input string using the nonstandard argument
339 separator character and fill in the provided structure, including
340 the argc argument counter field.
342 #define AST_NONSTANDARD_APP_ARGS(args, parse, sep) \
343 args.argc = ast_app_separate_args(parse, sep, args.argv, ((sizeof(args) - offsetof(typeof(args), argv)) / sizeof(args.argv[0])))
346 \brief Separate a string into arguments in an array
347 \param buf The string to be parsed (this must be a writable copy, as it will be modified)
348 \param delim The character to be used to delimit arguments
349 \param array An array of 'char *' to be filled in with pointers to the found arguments
350 \param arraylen The number of elements in the array (i.e. the number of arguments you will accept)
352 Note: if there are more arguments in the string than the array will hold, the last element of
353 the array will contain the remaining arguments, not separated.
355 The array will be completely zeroed by this function before it populates any entries.
357 \return The number of arguments found, or zero if the function arguments are not valid.
359 unsigned int ast_app_separate_args(char *buf, char delim, char **array, int arraylen);
362 \brief A structure to hold the description of an application 'option'.
364 Application 'options' are single-character flags that can be supplied
365 to the application to affect its behavior; they can also optionally
366 accept arguments enclosed in parenthesis.
368 These structures are used by the ast_app_parse_options function, uses
369 this data to fill in a flags structure (to indicate which options were
370 supplied) and array of argument pointers (for those options that had
373 struct ast_app_option {
374 /*! \brief The flag bit that represents this option. */
376 /*! \brief The index of the entry in the arguments array
377 that should be used for this option's argument. */
378 unsigned int arg_index;
381 #define BEGIN_OPTIONS {
382 #define END_OPTIONS }
385 \brief Declares an array of options for an application.
386 \param holder The name of the array to be created
387 \param options The actual options to be placed into the array
388 \sa ast_app_parse_options
390 This macro declares a 'static const' array of \c struct \c ast_option
391 elements to hold the list of available options for an application.
392 Each option must be declared using either the AST_APP_OPTION()
393 or AST_APP_OPTION_ARG() macros.
400 OPT_BLORT = (1 << 2),
401 } my_app_option_flags;
406 !! this entry tells how many possible arguments there are,
407 and must be the last entry in the list
409 } my_app_option_args;
411 AST_APP_OPTIONS(my_app_options, {
412 AST_APP_OPTION('j', OPT_JUMP),
413 AST_APP_OPTION_ARG('b', OPT_BLAH, OPT_ARG_BLAH),
414 AST_APP_OPTION_BLORT('B', OPT_BLORT, OPT_ARG_BLORT),
417 static int my_app_exec(struct ast_channel *chan, void *data)
420 struct ast_flags opts = { 0, };
421 char *opt_args[OPT_ARG_ARRAY_SIZE];
423 ... do any argument parsing here ...
425 if (ast_parseoptions(my_app_options, &opts, opt_args, options)) {
426 ast_module_user_remove(u);
432 #define AST_APP_OPTIONS(holder, options...) \
433 static const struct ast_app_option holder[128] = options
436 \brief Declares an application option that does not accept an argument.
437 \param option The single character representing the option
438 \param flagno The flag index to be set if this option is present
439 \sa AST_APP_OPTIONS, ast_app_parse_options
441 #define AST_APP_OPTION(option, flagno) \
442 [option] = { .flag = flagno }
445 \brief Declares an application option that accepts an argument.
446 \param option The single character representing the option
447 \param flagno The flag index to be set if this option is present
448 \param argno The index into the argument array where the argument should
450 \sa AST_APP_OPTIONS, ast_app_parse_options
452 #define AST_APP_OPTION_ARG(option, flagno, argno) \
453 [option] = { .flag = flagno, .arg_index = argno + 1 }
456 \brief Parses a string containing application options and sets flags/arguments.
457 \param options The array of possible options declared with AST_APP_OPTIONS
458 \param flags The flag structure to have option flags set
459 \param args The array of argument pointers to hold arguments found
460 \param optstr The string containing the options to be parsed
461 \return zero for success, non-zero if an error occurs
464 int ast_app_parse_options(const struct ast_app_option *options, struct ast_flags *flags, char **args, char *optstr);
467 \brief Parses a string containing application options and sets flags/arguments.
468 \param options The array of possible options declared with AST_APP_OPTIONS
469 \param flags The 64-bit flag structure to have option flags set
470 \param args The array of argument pointers to hold arguments found
471 \param optstr The string containing the options to be parsed
472 \return zero for success, non-zero if an error occurs
475 int ast_app_parse_options64(const struct ast_app_option *options, struct ast_flags64 *flags, char **args, char *optstr);
477 /*! \brief Given a list of options array, return an option string based on passed flags
478 \param options The array of possible options declared with AST_APP_OPTIONS
479 \param flags The flags of the options that you wish to populate the buffer with
480 \param buf The buffer to fill with the string of options
481 \param len The maximum length of buf
483 void ast_app_options2str64(const struct ast_app_option *options, struct ast_flags64 *flags, char *buf, size_t len);
485 /*! \brief Present a dialtone and collect a certain length extension.
486 \return Returns 1 on valid extension entered, -1 on hangup, or 0 on invalid extension.
487 \note Note that if 'collect' holds digits already, new digits will be appended, so be sure it's initialized properly */
488 int ast_app_dtget(struct ast_channel *chan, const char *context, char *collect, size_t size, int maxlen, int timeout);
490 /*! \brief Allow to record message and have a review option */
491 int ast_record_review(struct ast_channel *chan, const char *playfile, const char *recordfile, int maxtime, const char *fmt, int *duration, const char *path);
493 /*! \brief Decode an encoded control or extended ASCII character
494 \return Returns a pointer to the result string
496 int ast_get_encoded_char(const char *stream, char *result, size_t *consumed);
498 /*! \brief Decode a stream of encoded control or extended ASCII characters */
499 char *ast_get_encoded_str(const char *stream, char *result, size_t result_len);
501 /*! \brief Common routine for child processes, to close all fds prior to exec(2) */
502 void ast_close_fds_above_n(int n);
504 /*! \brief Common routine to safely fork without a chance of a signal handler firing badly in the child */
505 int ast_safe_fork(int stop_reaper);
507 /*! \brief Common routine to cleanup after fork'ed process is complete (if reaping was stopped) */
508 void ast_safe_fork_cleanup(void);
510 #if defined(__cplusplus) || defined(c_plusplus)
514 #endif /* _ASTERISK_APP_H */