res/ari/config.c File Reference

Config framework stuffz for ARI. More...

#include "asterisk.h"
#include "asterisk/config_options.h"
#include "asterisk/http_websocket.h"
#include "asterisk/app.h"
#include "asterisk/channel.h"
#include "internal.h"

Include dependency graph for res/ari/config.c:

Go to the source code of this file.

Macros
#define	CONF_FILENAME   "ari.conf"
#define	MAX_VARS   128

Functions
static	AO2_GLOBAL_OBJ_STATIC (confs)
	Locking container for safe configuration access. More...
void	ast_ari_config_destroy (void)
	Destroy the ARI configuration. More...
struct ast_ari_conf *	ast_ari_config_get (void)
	Get the current ARI configuration. More...
int	ast_ari_config_init (void)
	Initialize the ARI configuration. More...
int	ast_ari_config_reload (void)
	Reload the ARI configuration. More...
struct ast_ari_conf_user *	ast_ari_config_validate_user (const char *username, const char *password)
	Validated a user's credentials. More...
static int	channelvars_handler (const struct aco_option *opt, struct ast_variable *var, void *obj)
static void *	conf_alloc (void)
	Allocate an ast_ari_conf for config parsing. More...
static void	conf_destructor (void *obj)
	ast_ari_conf destructor. More...
static void	conf_general_dtor (void *obj)
	CONFIG_INFO_STANDARD (cfg_info, confs, conf_alloc,.files=ACO_FILES(&conf_file))
static int	encoding_format_handler (const struct aco_option *opt, struct ast_variable *var, void *obj)
	Encoding format handler converts from boolean to enum. More...
static int	password_format_handler (const struct aco_option *opt, struct ast_variable *var, void *obj)
	Parses the ast_ari_password_format enum from a config file. More...
static int	process_config (int reload)
	Load (or reload) configuration. More...
static void *	user_alloc (const char *cat)
	Allocate an ast_ari_conf_user for config parsing. More...
static void	user_dtor (void *obj)
	Destructor for ast_ari_conf_user. More...
static void *	user_find (struct ao2_container *tmp_container, const char *cat)
	aco_type item_find function More...
static int	user_sort_cmp (const void *obj_left, const void *obj_right, int flags)
	Sorting function for use with red/black tree. More...
static int	validate_user_cb (void *obj, void *arg, int flags)
	Callback to validate a user object. More...

Variables
static struct aco_file	conf_file
	The conf file that's processed for the module. More...
static struct aco_type	general_option
	Mapping of the ARI conf struct's globals to the general context in the config file. More...
static struct aco_type *	general_options [] = ACO_TYPES(&general_option)
static struct aco_type *	global_user [] = ACO_TYPES(&user_option)
static struct aco_type	user_option

Detailed Description

Config framework stuffz for ARI.

Author

David M. Lee, II dlee@.nosp@m.digi.nosp@m.um.co.nosp@m.m

Definition in file res/ari/config.c.

Macro Definition Documentation

CONF_FILENAME

#define CONF_FILENAME   "ari.conf"

Definition at line 214 of file res/ari/config.c.

Referenced by ast_ari_config_get().

MAX_VARS

#define MAX_VARS   128

Definition at line 321 of file res/ari/config.c.

Referenced by channelvars_handler().

Function Documentation

AO2_GLOBAL_OBJ_STATIC()

static AO2_GLOBAL_OBJ_STATIC ( confs  )

static

Locking container for safe configuration access.

ast_ari_config_destroy()

void ast_ari_config_destroy

(

void

)

Destroy the ARI configuration.

Definition at line 383 of file res/ari/config.c.

References aco_info_destroy(), and ao2_global_obj_release.

Referenced by unload_module().

{
   aco_info_destroy(&cfg_info);
   ao2_global_obj_release(confs);
}

ast_ari_config_get()

struct ast_ari_conf* ast_ari_config_get

(

void

)

Get the current ARI configuration.

This is an immutable object, so don't modify it. It is AO2 managed, so ao2_cleanup() when you're done with it.

Returns

ARI configuration object.

NULL on error.

Definition at line 227 of file res/ari/config.c.

References ao2_global_obj_ref, ast_log, CONF_FILENAME, and LOG_ERROR.

Referenced by ari_show(), ari_show_user(), ari_show_users(), ast_ari_callback(), ast_ari_config_validate_user(), ast_ari_json_format(), ast_ari_websocket_session_create(), complete_ari_user(), is_enabled(), origin_allowed(), and process_config().

{
   struct ast_ari_conf *res = ao2_global_obj_ref(confs);
   if (!res) {
      ast_log(LOG_ERROR,
         "Error obtaining config from " CONF_FILENAME "\n");
   }
   return res;
}

ast_ari_config_init()

int ast_ari_config_init

(

void

)

Initialize the ARI configuration.

Definition at line 337 of file res/ari/config.c.

References ACO_EXACT, aco_info_destroy(), aco_info_init(), aco_option_register, aco_option_register_custom, ARI_AUTH_REALM_LEN, ARI_PASSWORD_LEN, AST_DEFAULT_WEBSOCKET_WRITE_TIMEOUT_STR, channelvars_handler(), enabled, encoding_format_handler(), FLDSET, NULL, OPT_BOOL_T, OPT_CHAR_ARRAY_T, OPT_INT_T, OPT_NOOP_T, OPT_STRINGFIELD_T, PARSE_IN_RANGE, password, password_format_handler(), process_config(), ast_ari_conf_user::read_only, and STRFLDSET.

Referenced by load_module().

{
   if (aco_info_init(&cfg_info)) {
      aco_info_destroy(&cfg_info);
      return -1;
   }

   /* ARI general category options */
   aco_option_register(&cfg_info, "enabled", ACO_EXACT, general_options,
      "yes", OPT_BOOL_T, 1,
      FLDSET(struct ast_ari_conf_general, enabled));
   aco_option_register_custom(&cfg_info, "pretty", ACO_EXACT,
      general_options, "no",  encoding_format_handler, 0);
   aco_option_register(&cfg_info, "auth_realm", ACO_EXACT, general_options,
      "Asterisk REST Interface", OPT_CHAR_ARRAY_T, 0,
      FLDSET(struct ast_ari_conf_general, auth_realm),
      ARI_AUTH_REALM_LEN);
   aco_option_register(&cfg_info, "allowed_origins", ACO_EXACT, general_options,
      "", OPT_STRINGFIELD_T, 0,
      STRFLDSET(struct ast_ari_conf_general, allowed_origins));
   aco_option_register(&cfg_info, "websocket_write_timeout", ACO_EXACT, general_options,
      AST_DEFAULT_WEBSOCKET_WRITE_TIMEOUT_STR, OPT_INT_T, PARSE_IN_RANGE,
      FLDSET(struct ast_ari_conf_general, write_timeout), 1, INT_MAX);
   aco_option_register_custom(&cfg_info, "channelvars", ACO_EXACT, general_options,
      "", channelvars_handler, 0);

   /* ARI type=user category options */
   aco_option_register(&cfg_info, "type", ACO_EXACT, global_user, NULL,
      OPT_NOOP_T, 0, 0);
   aco_option_register(&cfg_info, "read_only", ACO_EXACT, global_user,
      "no", OPT_BOOL_T, 1,
      FLDSET(struct ast_ari_conf_user, read_only));
   aco_option_register(&cfg_info, "password", ACO_EXACT, global_user,
      "", OPT_CHAR_ARRAY_T, 0,
      FLDSET(struct ast_ari_conf_user, password), ARI_PASSWORD_LEN);
   aco_option_register_custom(&cfg_info, "password_format", ACO_EXACT,
      global_user, "plain",  password_format_handler, 0);

   return process_config(0);
}

ast_ari_config_reload()

int ast_ari_config_reload

(

void

)

Reload the ARI configuration.

Definition at line 378 of file res/ari/config.c.

References process_config().

Referenced by reload_module().

{
   return process_config(1);
}

ast_ari_config_validate_user()

struct ast_ari_conf_user* ast_ari_config_validate_user	(	const char *	username,
		const char *	password
	)

Validated a user's credentials.

Parameters

username	Name of the user.
password	User's password.

Returns

User object.

NULL if username or password is invalid.

Definition at line 237 of file res/ari/config.c.

References ao2_cleanup, ao2_find, ao2_ref, ARI_PASSWORD_FORMAT_CRYPT, ARI_PASSWORD_FORMAT_PLAIN, ast_ari_config_get(), ast_crypt_validate(), ast_log, ast_strlen_zero, LOG_WARNING, NULL, OBJ_SEARCH_KEY, RAII_VAR, and user.

Referenced by authenticate_api_key(), and authenticate_user().

{
   RAII_VAR(struct ast_ari_conf *, conf, NULL, ao2_cleanup);
   RAII_VAR(struct ast_ari_conf_user *, user, NULL, ao2_cleanup);
   int is_valid = 0;

   conf = ast_ari_config_get();
   if (!conf) {
      return NULL;
   }

   user = ao2_find(conf->users, username, OBJ_SEARCH_KEY);
   if (!user) {
      return NULL;
   }

   if (ast_strlen_zero(user->password)) {
      ast_log(LOG_WARNING,
         "User '%s' missing password; authentication failed\n",
         user->username);
      return NULL;
   }

   switch (user->password_format) {
   case ARI_PASSWORD_FORMAT_PLAIN:
      is_valid = strcmp(password, user->password) == 0;
      break;
   case ARI_PASSWORD_FORMAT_CRYPT:
      is_valid = ast_crypt_validate(password, user->password);
      break;
   }

   if (!is_valid) {
      return NULL;
   }

   ao2_ref(user, +1);
   return user;
}

channelvars_handler()

static int channelvars_handler ( const struct aco_option *  opt, struct ast_variable *  var, void *  obj  )

static

Definition at line 323 of file res/ari/config.c.

References args, AST_APP_ARG, ast_channel_set_ari_vars(), AST_DECLARE_APP_ARGS, AST_STANDARD_APP_ARGS, ast_strdupa, MAX_VARS, NULL, parse(), and ast_variable::value.

Referenced by ast_ari_config_init().

{
   char *parse = NULL;
   AST_DECLARE_APP_ARGS(args,
      AST_APP_ARG(vars)[MAX_VARS];
   );

   parse = ast_strdupa(var->value);
   AST_STANDARD_APP_ARGS(args, parse);

   ast_channel_set_ari_vars(args.argc, args.vars);
   return 0;
}

conf_alloc()

static void* conf_alloc ( void  )

static

Allocate an ast_ari_conf for config parsing.

Definition at line 187 of file res/ari/config.c.

References aco_set_defaults(), AO2_ALLOC_OPT_LOCK_NOLOCK, ao2_alloc_options, AO2_CONTAINER_ALLOC_OPT_DUPS_REPLACE, ao2_container_alloc_rbtree, ao2_ref, ast_string_field_init, conf_destructor(), conf_general_dtor(), ast_ari_conf::general, NULL, user_sort_cmp(), and ast_ari_conf::users.

{
   struct ast_ari_conf *cfg;

   cfg = ao2_alloc_options(sizeof(*cfg), conf_destructor,
      AO2_ALLOC_OPT_LOCK_NOLOCK);
   if (!cfg) {
      return NULL;
   }

   cfg->general = ao2_alloc_options(sizeof(*cfg->general), conf_general_dtor,
      AO2_ALLOC_OPT_LOCK_NOLOCK);

   cfg->users = ao2_container_alloc_rbtree(AO2_ALLOC_OPT_LOCK_NOLOCK,
      AO2_CONTAINER_ALLOC_OPT_DUPS_REPLACE, user_sort_cmp, NULL);

   if (!cfg->users
      || !cfg->general
      || ast_string_field_init(cfg->general, 64)
      || aco_set_defaults(&general_option, "general", cfg->general)) {
      ao2_ref(cfg, -1);
      return NULL;
   }

   return cfg;
}

conf_destructor()

static void conf_destructor ( void *  obj )

static

ast_ari_conf destructor.

Definition at line 178 of file res/ari/config.c.

References ao2_cleanup, ast_ari_conf::general, and ast_ari_conf::users.

Referenced by conf_alloc().

{
   struct ast_ari_conf *cfg = obj;

   ao2_cleanup(cfg->general);
   ao2_cleanup(cfg->users);
}

conf_general_dtor()

static void conf_general_dtor ( void *  obj )

static

Definition at line 170 of file res/ari/config.c.

References ast_string_field_free_memory.

Referenced by conf_alloc().

{
   struct ast_ari_conf_general *general = obj;

   ast_string_field_free_memory(general);
}

CONFIG_INFO_STANDARD()

CONFIG_INFO_STANDARD	(	cfg_info	,
		confs	,
		conf_alloc	,
		.	files = ACO_FILES(&conf_file)
	)

encoding_format_handler()

static int encoding_format_handler ( const struct aco_option *  opt, struct ast_variable *  var, void *  obj  )

static

Encoding format handler converts from boolean to enum.

Definition at line 49 of file res/ari/config.c.

References AST_JSON_COMPACT, AST_JSON_PRETTY, ast_true(), ast_ari_conf_general::format, ast_variable::name, and ast_variable::value.

Referenced by ast_ari_config_init().

{
   struct ast_ari_conf_general *general = obj;

   if (!strcasecmp(var->name, "pretty")) {
      general->format = ast_true(var->value) ?
         AST_JSON_PRETTY : AST_JSON_COMPACT;
   } else {
      return -1;
   }

   return 0;
}

password_format_handler()

static int password_format_handler ( const struct aco_option *  opt, struct ast_variable *  var, void *  obj  )

static

Parses the ast_ari_password_format enum from a config file.

Definition at line 65 of file res/ari/config.c.

References ARI_PASSWORD_FORMAT_CRYPT, ARI_PASSWORD_FORMAT_PLAIN, ast_ari_conf_user::password_format, and ast_variable::value.

Referenced by ast_ari_config_init().

{
   struct ast_ari_conf_user *user = obj;

   if (strcasecmp(var->value, "plain") == 0) {
      user->password_format = ARI_PASSWORD_FORMAT_PLAIN;
   } else if (strcasecmp(var->value, "crypt") == 0) {
      user->password_format = ARI_PASSWORD_FORMAT_CRYPT;
   } else {
      return -1;
   }

   return 0;
}

process_config()

static int process_config ( int  reload )

static

Load (or reload) configuration.

Definition at line 292 of file res/ari/config.c.

References aco_process_config(), ACO_PROCESS_ERROR, ACO_PROCESS_OK, ACO_PROCESS_UNCHANGED, ao2_callback, ao2_cleanup, ao2_container_count(), ast_ari_config_get(), ast_assert, ast_log, LOG_ERROR, NULL, OBJ_NODATA, RAII_VAR, and validate_user_cb().

Referenced by ast_ari_config_init(), and ast_ari_config_reload().

{
   RAII_VAR(struct ast_ari_conf *, conf, NULL, ao2_cleanup);

   switch (aco_process_config(&cfg_info, reload)) {
   case ACO_PROCESS_ERROR:
      return -1;
   case ACO_PROCESS_OK:
   case ACO_PROCESS_UNCHANGED:
      break;
   }

   conf = ast_ari_config_get();
   if (!conf) {
      ast_assert(0); /* We just configured; it should be there */
      return -1;
   }

   if (conf->general->enabled) {
      if (ao2_container_count(conf->users) == 0) {
         ast_log(LOG_ERROR, "No configured users for ARI\n");
      } else {
         ao2_callback(conf->users, OBJ_NODATA, validate_user_cb, NULL);
      }
   }

   return 0;
}

user_alloc()

static void* user_alloc ( const char *  cat )

static

Allocate an ast_ari_conf_user for config parsing.

Definition at line 90 of file res/ari/config.c.

References AO2_ALLOC_OPT_LOCK_NOLOCK, ao2_alloc_options, ao2_cleanup, ao2_ref, ast_debug, ast_strdup, NULL, RAII_VAR, user, and user_dtor().

{
   RAII_VAR(struct ast_ari_conf_user *, user, NULL, ao2_cleanup);

   if (!cat) {
      return NULL;
   }

   ast_debug(3, "Allocating user %s\n", cat);

   user = ao2_alloc_options(sizeof(*user), user_dtor,
      AO2_ALLOC_OPT_LOCK_NOLOCK);
   if (!user) {
      return NULL;
   }

   user->username = ast_strdup(cat);
   if (!user->username) {
      return NULL;
   }

   ao2_ref(user, +1);
   return user;
}

user_dtor()

static void user_dtor ( void *  obj )

static

Destructor for ast_ari_conf_user.

Definition at line 82 of file res/ari/config.c.

References ast_debug, ast_free, and ast_ari_conf_user::username.

Referenced by user_alloc().

{
   struct ast_ari_conf_user *user = obj;
   ast_debug(3, "Disposing of user %s\n", user->username);
   ast_free(user->username);
}

user_find()

static void* user_find ( struct ao2_container *  tmp_container, const char *  cat  )

static

aco_type item_find function

Definition at line 147 of file res/ari/config.c.

References ao2_find, NULL, and OBJ_SEARCH_KEY.

{
   if (!cat) {
      return NULL;
   }

   return ao2_find(tmp_container, cat, OBJ_SEARCH_KEY);
}

user_sort_cmp()

static int user_sort_cmp ( const void *  obj_left, const void *  obj_right, int  flags  )

static

Sorting function for use with red/black tree.

Definition at line 116 of file res/ari/config.c.

References ast_assert, OBJ_SEARCH_KEY, OBJ_SEARCH_MASK, OBJ_SEARCH_OBJECT, OBJ_SEARCH_PARTIAL_KEY, and ast_ari_conf_user::username.

Referenced by conf_alloc().

{
   const struct ast_ari_conf_user *user_left = obj_left;
   const struct ast_ari_conf_user *user_right = obj_right;
   const char *key_right = obj_right;
   int cmp;

   switch (flags & OBJ_SEARCH_MASK) {
   case OBJ_SEARCH_OBJECT:
      key_right = user_right->username;
      /* Fall through */
   case OBJ_SEARCH_KEY:
      cmp = strcasecmp(user_left->username, key_right);
      break;
   case OBJ_SEARCH_PARTIAL_KEY:
      /*
       * We could also use a partial key struct containing a length
       * so strlen() does not get called for every comparison instead.
       */
      cmp = strncasecmp(user_left->username, key_right, strlen(key_right));
      break;
   default:
      /* Sort can only work on something with a full or partial key. */
      ast_assert(0);
      cmp = 0;
      break;
   }
   return cmp;
}

validate_user_cb()

static int validate_user_cb ( void *  obj, void *  arg, int  flags  )

static

Callback to validate a user object.

Definition at line 279 of file res/ari/config.c.

References ast_log, ast_strlen_zero, LOG_WARNING, ast_ari_conf_user::password, and ast_ari_conf_user::username.

Referenced by process_config().

{
   struct ast_ari_conf_user *user = obj;

   if (ast_strlen_zero(user->password)) {
      ast_log(LOG_WARNING, "User '%s' missing password\n",
         user->username);
   }

   return 0;
}

Variable Documentation

conf_file

struct aco_file conf_file

static

The conf file that's processed for the module.

Definition at line 217 of file res/ari/config.c.

general_option

struct aco_type general_option

static

Mapping of the ARI conf struct's globals to the general context in the config file.

Definition at line 38 of file res/ari/config.c.

general_options

struct aco_type* general_options[] = ACO_TYPES(&general_option)

static

Definition at line 46 of file res/ari/config.c.

global_user

struct aco_type* global_user[] = ACO_TYPES(&user_option)

static

Definition at line 168 of file res/ari/config.c.

user_option

struct aco_type user_option

static

Definition at line 156 of file res/ari/config.c.