app_skel.c

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/*
 * Asterisk -- An open source telephony toolkit.
 *
 * Copyright (C) <Year>, <Your Name Here>
 *
 * <Your Name Here> <<Your Email Here>>
 *
 * See http://www.asterisk.org for more information about
 * the Asterisk project. Please do not directly contact
 * any of the maintainers of this project for assistance;
 * the project provides a web site, mailing lists and IRC
 * channels for your use.
 *
 * This program is free software, distributed under the terms of
 * the GNU General Public License Version 2. See the LICENSE file
 * at the top of the source tree.
 *
 * Please follow coding guidelines
 * https://wiki.asterisk.org/wiki/display/AST/Coding+Guidelines
 */

/*! \file
 *
 * \brief Skeleton application
 *
 * \author\verbatim <Your Name Here> <<Your Email Here>> \endverbatim
 *
 * This is a skeleton for development of an Asterisk application
 * \ingroup applications
 */

/*! \li \ref app_skel.c uses configuration file \ref app_skel.conf
 * \addtogroup configuration_file Configuration Files
 */

/*!
 * \page app_skel.conf app_skel.conf
 * \verbinclude app_skel.conf.sample
 */

/*** MODULEINFO
 <defaultenabled>no</defaultenabled>
 <support_level>core</support_level>
 ***/

#include "asterisk.h"

#include <math.h> /* log10 */
#include "asterisk/file.h"
#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/module.h"
#include "asterisk/lock.h"
#include "asterisk/app.h"
#include "asterisk/config.h"
#include "asterisk/config_options.h"
#include "asterisk/say.h"
#include "asterisk/astobj2.h"
#include "asterisk/acl.h"
#include "asterisk/netsock2.h"
#include "asterisk/strings.h"
#include "asterisk/cli.h"

/*** DOCUMENTATION
 <application name="SkelGuessNumber" language="en_US">
 <synopsis>
 An example number guessing game
 </synopsis>
 <syntax>
 <parameter name="level" required="true"/>
 <parameter name="options">
 <optionlist>
 <option name="c">
 <para>The computer should cheat</para>
 </option>
 <option name="n">
 <para>How many games to play before hanging up</para>
 </option>
 </optionlist>
 </parameter>
 </syntax>
 <description>
 <para>This simple number guessing application is a template to build other applications
 from. It shows you the basic structure to create your own Asterisk applications.</para>
 </description>
 </application>

 <configInfo name="app_skel" language="en_US">
 <configFile name="app_skel.conf">
 <configObject name="globals">
 <synopsis>Options that apply globally to app_skel</synopsis>
 <configOption name="games">
 <synopsis>The number of games a single execution of SkelGuessNumber will play</synopsis>
 </configOption>
 <configOption name="cheat">
 <synopsis>Should the computer cheat?</synopsis>
 <description><para>If enabled, the computer will ignore winning guesses.</para></description>
 </configOption>
 </configObject>
 <configObject name="sounds">
 <synopsis>Prompts for SkelGuessNumber to play</synopsis>
 <configOption name="prompt" default="please-enter-your&amp;number&amp;queue-less-than">
 <synopsis>A prompt directing the user to enter a number less than the max number</synopsis>
 </configOption>
 <configOption name="wrong_guess" default="vm-pls-try-again">
 <synopsis>The sound file to play when a wrong guess is made</synopsis>
 </configOption>
 <configOption name="right_guess" default="auth-thankyou">
 <synopsis>The sound file to play when a correct guess is made</synopsis>
 </configOption>
 <configOption name="too_low">
 <synopsis>The sound file to play when a guess is too low</synopsis>
 </configOption>
 <configOption name="too_high">
 <synopsis>The sound file to play when a guess is too high</synopsis>
 </configOption>
 <configOption name="lose" default="vm-goodbye">
 <synopsis>The sound file to play when a player loses</synopsis>
 </configOption>
 </configObject>
 <configObject name="level">
 <synopsis>Defined levels for the SkelGuessNumber game</synopsis>
 <configOption name="max_number">
 <synopsis>The maximum in the range of numbers to guess (1 is the implied minimum)</synopsis>
 </configOption>
 <configOption name="max_guesses">
 <synopsis>The maximum number of guesses before a game is considered lost</synopsis>
 </configOption>
 </configObject>
 </configFile>
 </configInfo>
 ***/

static char *app = "SkelGuessNumber";

enum option_flags {
 OPTION_CHEAT = (1 << 0),
 OPTION_NUMGAMES = (1 << 1),
};

enum option_args {
 OPTION_ARG_NUMGAMES,
 /* This *must* be the last value in this enum! */
 OPTION_ARG_ARRAY_SIZE,
};

AST_APP_OPTIONS(app_opts,{
 AST_APP_OPTION('c', OPTION_CHEAT),
 AST_APP_OPTION_ARG('n', OPTION_NUMGAMES, OPTION_ARG_NUMGAMES),
});

/*! \brief A structure to hold global configuration-related options */
struct skel_global_config {
 AST_DECLARE_STRING_FIELDS(
 AST_STRING_FIELD(prompt); /*!< The comma-separated list of sounds to prompt to enter a number */
 AST_STRING_FIELD(wrong); /*!< The comma-separated list of sounds to indicate a wrong guess */
 AST_STRING_FIELD(right); /*!< The comma-separated list of sounds to indicate a right guess */
 AST_STRING_FIELD(high); /*!< The comma-separated list of sounds to indicate a high guess */
 AST_STRING_FIELD(low); /*!< The comma-separated list of sounds to indicate a low guess */
 AST_STRING_FIELD(lose); /*!< The comma-separated list of sounds to indicate a lost game */
 );
 uint32_t num_games; /*!< The number of games to play before hanging up */
 unsigned char cheat:1; /*!< Whether the computer can cheat or not */
};

/*! \brief A structure to maintain level state across reloads */
struct skel_level_state {
 uint32_t wins; /*!< How many wins for this level */
 uint32_t losses; /*!< How many losses for this level */
 double avg_guesses; /*!< The average number of guesses to win for this level */
};

/*! \brief Object to hold level config information.
 * \note This object should hold a reference to an object that holds state across reloads.
 * The other fields are just examples of the kind of data that might be stored in an level.
 */
struct skel_level {
 AST_DECLARE_STRING_FIELDS(
 AST_STRING_FIELD(name); /*!< The name of the level */
 );
 uint32_t max_num; /*!< The upper value on th range of numbers to guess */
 uint32_t max_guesses; /*!< The maximum number of guesses before losing */
 struct skel_level_state *state; /*!< A pointer to level state that must exist across all reloads */
};

/*! \brief Information about a currently running set of games
 * \note Because we want to be able to show true running information about the games
 * regardless of whether or not a reload has modified what the level looks like, it
 * is important to either copy the information we need from the level to the
 * current_game struct, or as we do here, store a reference to the level as it is for
 * the running game.
 */
struct skel_current_game {
 uint32_t total_games; /*! The total number of games for this call to the app */
 uint32_t games_left; /*! How many games are left to play in this set */
 uint32_t cheat; /*! Whether or not cheating was enabled for the game */
 struct skel_level *level_info; /*! The level information for the running game */
};

/* Treat the levels as an array--there won't be many and this will maintain the order */
#define LEVEL_BUCKETS 1

/*! \brief A container that holds all config-related information
 * \note This object should contain a pointer to structs for global data and containers for
 * any levels that are configured. Objects of this type will be swapped out on reload. If an
 * level needs to maintain state across reloads, it needs to allocate a refcounted object to
 * hold that state and ensure that a reference is passed to that state when creating a new
 * level for reload. */
struct skel_config {
 struct skel_global_config *global;
 struct ao2_container *levels;
};

/* Config Options API callbacks */

/*! \brief Allocate a skel_config to hold a snapshot of the complete results of parsing a config
 * \internal
 * \returns A void pointer to a newly allocated skel_config
 */
static void *skel_config_alloc(void);

/*! \brief Allocate a skel_level based on a category in a configuration file
 * \param cat The category to base the level on
 * \returns A void pointer to a newly allocated skel_level
 */
static void *skel_level_alloc(const char *cat);

/*! \brief Find a skel level in the specified container
 * \note This function *does not* look for a skel_level in the active container. It is used
 * internally by the Config Options code to check if an level has already been added to the
 * container that will be swapped for the live container on a successul reload.
 *
 * \param tmp_container A non-active container to search for a level
 * \param category The category associated with the level to check for
 * \retval non-NULL The level from the container
 * \retval NULL The level does not exist in the container
 */
static void *skel_level_find(struct ao2_container *tmp_container, const char *category);

/*! \brief An aco_type structure to link the "general" category to the skel_global_config type */
static struct aco_type global_option = {
 .type = ACO_GLOBAL,
 .name = "globals",
 .item_offset = offsetof(struct skel_config, global),
 .category_match = ACO_WHITELIST_EXACT,
 .category = "general",
};

struct aco_type *global_options[] = ACO_TYPES(&global_option);

/*! \brief An aco_type structure to link the "sounds" category to the skel_global_config type */
static struct aco_type sound_option = {
 .type = ACO_GLOBAL,
 .name = "sounds",
 .item_offset = offsetof(struct skel_config, global),
 .category_match = ACO_WHITELIST_EXACT,
 .category = "sounds",
};

struct aco_type *sound_options[] = ACO_TYPES(&sound_option);

static const char *level_categories[] = {
 "general",
 "sounds",
 NULL,
};

/*! \brief An aco_type structure to link the everything but the "general" and "sounds" categories to the skel_level type */
static struct aco_type level_option = {
 .type = ACO_ITEM,
 .name = "level",
 .category_match = ACO_BLACKLIST_ARRAY,
 .category = (const char *)level_categories,
 .item_alloc = skel_level_alloc,
 .item_find = skel_level_find,
 .item_offset = offsetof(struct skel_config, levels),
};

struct aco_type *level_options[] = ACO_TYPES(&level_option);

struct aco_file app_skel_conf = {
 .filename = "app_skel.conf",
 .types = ACO_TYPES(&global_option, &sound_option, &level_option),
};

/*! \brief A global object container that will contain the skel_config that gets swapped out on reloads */
static AO2_GLOBAL_OBJ_STATIC(globals);

/*! \brief The container of active games */
static struct ao2_container *games;

/*! \brief Register information about the configs being processed by this module */
CONFIG_INFO_STANDARD(cfg_info, globals, skel_config_alloc,
 .files = ACO_FILES(&app_skel_conf),
);

static void skel_global_config_destructor(void *obj)
{
 struct skel_global_config *global = obj;
 ast_string_field_free_memory(global);
}

static void skel_game_destructor(void *obj)
{
 struct skel_current_game *game = obj;
 ao2_cleanup(game->level_info);
}

static void skel_state_destructor(void *obj)
{
 return;
}

static struct skel_current_game *skel_game_alloc(struct skel_level *level)
{
 struct skel_current_game *game;
 if (!(game = ao2_alloc(sizeof(struct skel_current_game), skel_game_destructor))) {
 return NULL;
 }
 ao2_ref(level, +1);
 game->level_info = level;
 return game;
}

static void skel_level_destructor(void *obj)
{
 struct skel_level *level = obj;
 ast_string_field_free_memory(level);
 ao2_cleanup(level->state);
}

static int skel_level_hash(const void *obj, const int flags)
{
 const struct skel_level *level = obj;
 const char *name = (flags & OBJ_KEY) ? obj : level->name;
 return ast_str_case_hash(name);
}

static int skel_level_cmp(void *obj, void *arg, int flags)
{
 struct skel_level *one = obj, *two = arg;
 const char *match = (flags & OBJ_KEY) ? arg : two->name;
 return strcasecmp(one->name, match) ? 0 : (CMP_MATCH | CMP_STOP);
}

/*! \brief A custom bitfield handler
 * \internal
 * \note It is not possible to take the address of a bitfield, therefor all
 * bitfields in the config struct will have to use a custom handler
 * \param opt The opaque config option
 * \param var The ast_variable containing the option name and value
 * \param obj The object registerd for this option type
 * \retval 0 Success
 * \retval non-zero Failure
 */
static int custom_bitfield_handler(const struct aco_option *opt, struct ast_variable *var, void *obj)
{
 struct skel_global_config *global = obj;

 if (!strcasecmp(var->name, "cheat")) {
 global->cheat = ast_true(var->value);
 } else {
 return -1;
 }

 return 0;
}

static void play_files_helper(struct ast_channel *chan, const char *prompts)
{
 char *prompt, *rest = ast_strdupa(prompts);

 ast_stopstream(chan);
 while ((prompt = strsep(&rest, "&")) && !ast_stream_and_wait(chan, prompt, "")) {
 ast_stopstream(chan);
 }
}

static int app_exec(struct ast_channel *chan, const char *data)
{
 int win = 0;
 uint32_t guesses;
 RAII_VAR(struct skel_config *, cfg, ao2_global_obj_ref(globals), ao2_cleanup);
 RAII_VAR(struct skel_level *, level, NULL, ao2_cleanup);
 RAII_VAR(struct skel_current_game *, game, NULL, ao2_cleanup);
 char *parse, *opts[OPTION_ARG_ARRAY_SIZE];
 struct ast_flags flags;
 AST_DECLARE_APP_ARGS(args,
 AST_APP_ARG(level);
 AST_APP_ARG(options);
 );

 if (!cfg) {
 ast_log(LOG_ERROR, "Couldn't access configuratino data!\n");
 return -1;
 }

 if (ast_strlen_zero(data)) {
 ast_log(LOG_WARNING, "%s requires an argument (level[,options])\n", app);
 return -1;
 }

 /* We need to make a copy of the input string if we are going to modify it! */
 parse = ast_strdupa(data);

 AST_STANDARD_APP_ARGS(args, parse);

 if (args.argc == 2) {
 ast_app_parse_options(app_opts, &flags, opts, args.options);
 }

 if (ast_strlen_zero(args.level)) {
 ast_log(LOG_ERROR, "%s requires a level argument\n", app);
 return -1;
 }

 if (!(level = ao2_find(cfg->levels, args.level, OBJ_KEY))) {
 ast_log(LOG_ERROR, "Unknown level: %s\n", args.level);
 return -1;
 }

 if (!(game = skel_game_alloc(level))) {
 return -1;
 }

 ao2_link(games, game);

 /* Use app-specified values, or the options specified in [general] if they aren't passed to the app */
 if (!ast_test_flag(&flags, OPTION_NUMGAMES) ||
 ast_strlen_zero(opts[OPTION_ARG_NUMGAMES]) ||
 ast_parse_arg(opts[OPTION_ARG_NUMGAMES], PARSE_UINT32, &game->total_games)) {
 game->total_games = cfg->global->num_games;
 }
 game->games_left = game->total_games;
 game->cheat = ast_test_flag(&flags, OPTION_CHEAT) || cfg->global->cheat;

 for (game->games_left = game->total_games; game->games_left; game->games_left--) {
 uint32_t num = ast_random() % level->max_num; /* random number between 0 and level->max_num */

 ast_debug(1, "They should totally should guess %u\n", num);

 /* Play the prompt */
 play_files_helper(chan, cfg->global->prompt);
 ast_say_number(chan, level->max_num, "", ast_channel_language(chan), "");

 for (guesses = 0; guesses < level->max_guesses; guesses++) {
 size_t buflen = log10(level->max_num) + 1;
 char buf[buflen];
 int guess;
 buf[buflen] = '\0';

 /* Read the number pressed */
 ast_readstring(chan, buf, buflen - 1, 2000, 10000, "");
 if (ast_parse_arg(buf, PARSE_INT32 | PARSE_IN_RANGE, &guess, 0, level->max_num)) {
 if (guesses < level->max_guesses - 1) {
 play_files_helper(chan, cfg->global->wrong);
 }
 continue;
 }

 /* Inform whether the guess was right, low, or high */
 if (guess == num && !game->cheat) {
 /* win */
 win = 1;
 play_files_helper(chan, cfg->global->right);
 guesses++;
 break;
 } else if (guess < num) {
 play_files_helper(chan, cfg->global->low);
 } else {
 play_files_helper(chan, cfg->global->high);
 }

 if (guesses < level->max_guesses - 1) {
 play_files_helper(chan, cfg->global->wrong);
 }
 }

 /* Process game stats */
 ao2_lock(level->state);
 if (win) {
 ++level->state->wins;
 level->state->avg_guesses = ((level->state->wins - 1) * level->state->avg_guesses + guesses) / level->state->wins;
 } else {
 /* lose */
 level->state->losses++;
 play_files_helper(chan, cfg->global->lose);
 }
 ao2_unlock(level->state);
 }

 ao2_unlink(games, game);

 return 0;
}

static struct skel_level *skel_state_alloc(const char *name)
{
 struct skel_level *level;

 if (!(level = ao2_alloc(sizeof(*level), skel_state_destructor))) {
 return NULL;
 }

 return level;
}

static void *skel_level_find(struct ao2_container *tmp_container, const char *category)
{
 return ao2_find(tmp_container, category, OBJ_KEY);
}

/*! \brief Look up an existing state object, or create a new one
 * \internal
 * \note Since the reload code will create a new level from scratch, it
 * is important for any state that must persist between reloads to be
 * in a separate refcounted object. This function allows the level alloc
 * function to get a ref to an existing state object if it exists,
 * otherwise it will return a reference to a newly allocated state object.
 */
static void *skel_find_or_create_state(const char *category)
{
 RAII_VAR(struct skel_config *, cfg, ao2_global_obj_ref(globals), ao2_cleanup);
 RAII_VAR(struct skel_level *, level, NULL, ao2_cleanup);
 if (!cfg || !cfg->levels || !(level = ao2_find(cfg->levels, category, OBJ_KEY))) {
 return skel_state_alloc(category);
 }
 ao2_ref(level->state, +1);
 return level->state;
}

static void *skel_level_alloc(const char *cat)
{
 struct skel_level *level;

 if (!(level = ao2_alloc(sizeof(*level), skel_level_destructor))) {
 return NULL;
 }

 if (ast_string_field_init(level, 128)) {
 ao2_ref(level, -1);
 return NULL;
 }

 /* Since the level has state information that needs to persist between reloads,
 * it is important to handle that here in the level's allocation function.
 * If not separated out into its own object, the data would be destroyed on
 * reload. */
 if (!(level->state = skel_find_or_create_state(cat))) {
 ao2_ref(level, -1);
 return NULL;
 }

 ast_string_field_set(level, name, cat);

 return level;
}

static void skel_config_destructor(void *obj)
{
 struct skel_config *cfg = obj;
 ao2_cleanup(cfg->global);
 ao2_cleanup(cfg->levels);
}

static void *skel_config_alloc(void)
{
 struct skel_config *cfg;

 if (!(cfg = ao2_alloc(sizeof(*cfg), skel_config_destructor))) {
 return NULL;
 }

 /* Allocate/initialize memory */
 if (!(cfg->global = ao2_alloc(sizeof(*cfg->global), skel_global_config_destructor))) {
 goto error;
 }

 if (ast_string_field_init(cfg->global, 128)) {
 goto error;
 }

 cfg->levels = ao2_container_alloc_hash(AO2_ALLOC_OPT_LOCK_MUTEX, 0, LEVEL_BUCKETS,
 skel_level_hash, NULL, skel_level_cmp);
 if (!cfg->levels) {
 goto error;
 }

 return cfg;
error:
 ao2_ref(cfg, -1);
 return NULL;
}

static char *handle_skel_show_config(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
 RAII_VAR(struct skel_config *, cfg, NULL, ao2_cleanup);

 switch(cmd) {
 case CLI_INIT:
 e->command = "skel show config";
 e->usage =
 "Usage: skel show config\n"
 " List app_skel global config\n";
 return NULL;
 case CLI_GENERATE:
 return NULL;
 }

 if (!(cfg = ao2_global_obj_ref(globals)) || !cfg->global) {
 return NULL;
 }

 ast_cli(a->fd, "games per call: %u\n", cfg->global->num_games);
 ast_cli(a->fd, "computer cheats: %s\n", AST_CLI_YESNO(cfg->global->cheat));
 ast_cli(a->fd, "\n");
 ast_cli(a->fd, "Sounds\n");
 ast_cli(a->fd, " prompt: %s\n", cfg->global->prompt);
 ast_cli(a->fd, " wrong guess: %s\n", cfg->global->wrong);
 ast_cli(a->fd, " right guess: %s\n", cfg->global->right);

 return CLI_SUCCESS;
}

static char *handle_skel_show_games(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
 struct ao2_iterator iter;
 struct skel_current_game *game;

 switch(cmd) {
 case CLI_INIT:
 e->command = "skel show games";
 e->usage =
 "Usage: skel show games\n"
 " List app_skel active games\n";
 return NULL;
 case CLI_GENERATE:
 return NULL;
 }

#define SKEL_FORMAT "%-15.15s %-15.15s %-15.15s\n"
#define SKEL_FORMAT1 "%-15.15s %-15u %-15u\n"
 ast_cli(a->fd, SKEL_FORMAT, "Level", "Total Games", "Games Left");
 iter = ao2_iterator_init(games, 0);
 while ((game = ao2_iterator_next(&iter))) {
 ast_cli(a->fd, SKEL_FORMAT1, game->level_info->name, game->total_games, game->games_left);
 ao2_ref(game, -1);
 }
 ao2_iterator_destroy(&iter);
#undef SKEL_FORMAT
#undef SKEL_FORMAT1
 return CLI_SUCCESS;
}

static char *handle_skel_show_levels(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
 RAII_VAR(struct skel_config *, cfg, NULL, ao2_cleanup);
 struct ao2_iterator iter;
 struct skel_level *level;

 switch(cmd) {
 case CLI_INIT:
 e->command = "skel show levels";
 e->usage =
 "Usage: skel show levels\n"
 " List the app_skel levels\n";
 return NULL;
 case CLI_GENERATE:
 return NULL;
 }

 if (!(cfg = ao2_global_obj_ref(globals)) || !cfg->levels) {
 return NULL;
 }

#define SKEL_FORMAT "%-15.15s %-11.11s %-12.12s %-8.8s %-8.8s %-12.12s\n"
#define SKEL_FORMAT1 "%-15.15s %-11u %-12u %-8u %-8u %-8f\n"
 ast_cli(a->fd, SKEL_FORMAT, "Name", "Max number", "Max Guesses", "Wins", "Losses", "Avg Guesses");
 iter = ao2_iterator_init(cfg->levels, 0);
 while ((level = ao2_iterator_next(&iter))) {
 ast_cli(a->fd, SKEL_FORMAT1, level->name, level->max_num, level->max_guesses, level->state->wins, level->state->losses, level->state->avg_guesses);
 ao2_ref(level, -1);
 }
 ao2_iterator_destroy(&iter);
#undef SKEL_FORMAT
#undef SKEL_FORMAT1

 return CLI_SUCCESS;
}

static struct ast_cli_entry skel_cli[] = {
 AST_CLI_DEFINE(handle_skel_show_config, "Show app_skel global config options"),
 AST_CLI_DEFINE(handle_skel_show_levels, "Show app_skel levels"),
 AST_CLI_DEFINE(handle_skel_show_games, "Show app_skel active games"),
};

static int reload_module(void)
{
 if (aco_process_config(&cfg_info, 1) == ACO_PROCESS_ERROR) {
 return AST_MODULE_LOAD_DECLINE;
 }

 return 0;
}

static int unload_module(void)
{
 ast_cli_unregister_multiple(skel_cli, ARRAY_LEN(skel_cli));
 aco_info_destroy(&cfg_info);
 ao2_global_obj_release(globals);
 ao2_cleanup(games);
 return ast_unregister_application(app);
}

/*!
 * \brief Load the module
 *
 * Module loading including tests for configuration or dependencies.
 * This function can return AST_MODULE_LOAD_FAILURE, AST_MODULE_LOAD_DECLINE,
 * or AST_MODULE_LOAD_SUCCESS. If a dependency or environment variable fails
 * tests return AST_MODULE_LOAD_FAILURE. If the module can not load the
 * configuration file or other non-critical problem return
 * AST_MODULE_LOAD_DECLINE. On success return AST_MODULE_LOAD_SUCCESS.
 */
static int load_module(void)
{
 if (aco_info_init(&cfg_info)) {
 goto error;
 }

 games = ao2_container_alloc_list(AO2_ALLOC_OPT_LOCK_MUTEX, 0, NULL, NULL);
 if (!games) {
 goto error;
 }

 /* Global options */
 aco_option_register(&cfg_info, "games", ACO_EXACT, global_options, "3", OPT_UINT_T, 0, FLDSET(struct skel_global_config, num_games));
 aco_option_register_custom(&cfg_info, "cheat", ACO_EXACT, global_options, "no", custom_bitfield_handler, 0);

 /* Sound options */
 aco_option_register(&cfg_info, "prompt", ACO_EXACT, sound_options, "please-enter-your&number&queue-less-than", OPT_STRINGFIELD_T, 0, STRFLDSET(struct skel_global_config, prompt));
 aco_option_register(&cfg_info, "wrong_guess", ACO_EXACT, sound_options, "vm-pls-try-again", OPT_STRINGFIELD_T, 0, STRFLDSET(struct skel_global_config, wrong));
 aco_option_register(&cfg_info, "right_guess", ACO_EXACT, sound_options, "auth-thankyou", OPT_STRINGFIELD_T, 0, STRFLDSET(struct skel_global_config, right));
 aco_option_register(&cfg_info, "too_high", ACO_EXACT, sound_options, "high", OPT_STRINGFIELD_T, 0, STRFLDSET(struct skel_global_config, high));
 aco_option_register(&cfg_info, "too_low", ACO_EXACT, sound_options, "low", OPT_STRINGFIELD_T, 0, STRFLDSET(struct skel_global_config, low));
 aco_option_register(&cfg_info, "lose", ACO_EXACT, sound_options, "vm-goodbye", OPT_STRINGFIELD_T, 0, STRFLDSET(struct skel_global_config, lose));

 /* Level options */
 aco_option_register(&cfg_info, "max_number", ACO_EXACT, level_options, NULL, OPT_UINT_T, 0, FLDSET(struct skel_level, max_num));
 aco_option_register(&cfg_info, "max_guesses", ACO_EXACT, level_options, NULL, OPT_UINT_T, 0, FLDSET(struct skel_level, max_guesses));

 if (aco_process_config(&cfg_info, 0) == ACO_PROCESS_ERROR) {
 goto error;
 }

 ast_cli_register_multiple(skel_cli, ARRAY_LEN(skel_cli));
 if (ast_register_application_xml(app, app_exec)) {
 goto error;
 }
 return AST_MODULE_LOAD_SUCCESS;

error:
 aco_info_destroy(&cfg_info);
 ao2_cleanup(games);
 return AST_MODULE_LOAD_DECLINE;
}

AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "Skeleton (sample) Application",
 .support_level = AST_MODULE_SUPPORT_CORE,
 .load = load_module,
 .unload = unload_module,
 .reload = reload_module,
);