Lua PBX Switch. More...
#include "asterisk.h"
#include "asterisk/logger.h"
#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/module.h"
#include "asterisk/cli.h"
#include "asterisk/utils.h"
#include "asterisk/term.h"
#include "asterisk/paths.h"
#include "asterisk/hashtab.h"
#include <lua.h>
#include <lauxlib.h>
#include <lualib.h>
Go to the source code of this file.
Defines | |
#define | LUA_BUF_SIZE 4096 |
#define | LUA_EXT_DATA_SIZE 256 |
Functions | |
static void | __reg_module (void) |
static void | __unreg_module (void) |
static int | canmatch (struct ast_channel *chan, const char *context, const char *exten, int priority, const char *callerid, const char *data) |
static int | exec (struct ast_channel *chan, const char *context, const char *exten, int priority, const char *callerid, const char *data) |
static int | exists (struct ast_channel *chan, const char *context, const char *exten, int priority, const char *callerid, const char *data) |
static int | load_module (void) |
static int | load_or_reload_lua_stuff (void) |
static int | lua_autoservice_start (lua_State *L) |
[lua_CFunction] Tell pbx_lua to maintain an autoservice on this channel (for access from lua, don't call directly) | |
static int | lua_autoservice_status (lua_State *L) |
[lua_CFunction] Get the status of the autoservice flag (for access from lua, don't call directly) | |
static int | lua_autoservice_stop (lua_State *L) |
[lua_CFunction] Tell pbx_lua to stop maintaning an autoservice on this channel (for access from lua, don't call directly) | |
static int | lua_check_hangup (lua_State *L) |
[lua_CFunction] Check if this channel has been hungup or not (for access from lua, don't call directly) | |
static void | lua_create_app_table (lua_State *L) |
Create the global 'app' table for executing applications. | |
static void | lua_create_application_metatable (lua_State *L) |
Create the 'application' metatable, used to execute asterisk applications from lua. | |
static void | lua_create_autoservice_functions (lua_State *L) |
Create the autoservice functions. | |
static void | lua_create_channel_table (lua_State *L) |
Create the global 'channel' table for accesing channel variables. | |
static void | lua_create_hangup_function (lua_State *L) |
Create the hangup check function. | |
static void | lua_create_variable_metatable (lua_State *L) |
Create the 'variable' metatable, used to retrieve channel variables. | |
static int | lua_error_function (lua_State *L) |
[lua_CFunction] Handle lua errors (for access from lua, don't call directly) | |
static int | lua_extension_cmp (lua_State *L) |
[lua_CFunction] Compare two extensions (for access from lua, don't call directly) | |
static int | lua_find_extension (lua_State *L, const char *context, const char *exten, int priority, ast_switch_f *func, int push_func) |
Locate an extensions and optionally push the matching function on the stack. | |
static void | lua_free_extensions () |
Free the internal extensions buffer. | |
static int | lua_func_read (lua_State *L) |
[lua_CFunction] Create a 'variable' object for accessing a dialplan function (for access from lua, don't call directly) | |
static lua_State * | lua_get_state (struct ast_channel *chan) |
Get the lua_State for this channel. | |
static int | lua_get_variable (lua_State *L) |
[lua_CFunction] Return a lua 'variable' object (for access from lua, don't call directly) | |
static int | lua_get_variable_value (lua_State *L) |
[lua_CFunction] Used to get the value of a variable or dialplan function (for access from lua, don't call directly) | |
static int | lua_load_extensions (lua_State *L, struct ast_channel *chan) |
Load the extensions.lua file from the internal buffer. | |
static int | lua_pbx_exec (lua_State *L) |
[lua_CFunction] This function is part of the 'application' metatable and is used to execute applications similar to pbx_exec() (for access from lua, don't call directly) | |
static int | lua_pbx_findapp (lua_State *L) |
[lua_CFunction] Find an app and return it in a lua table (for access from lua, don't call directly) | |
static void | lua_push_variable_table (lua_State *L, const char *name) |
Push a 'variable' table on the stack for access the channel variable with the given name. | |
static char * | lua_read_extensions_file (lua_State *L, long *size) |
Load the extensions.lua file in to a buffer and execute the file. | |
static int | lua_register_switches (lua_State *L) |
Register dialplan switches for our pbx_lua contexs. | |
static int | lua_reload_extensions (lua_State *L) |
Reload the extensions file and update the internal buffers if it loads correctly. | |
static int | lua_set_variable (lua_State *L) |
[lua_CFunction] Set the value of a channel variable or dialplan function (for access from lua, don't call directly) | |
static int | lua_set_variable_value (lua_State *L) |
[lua_CFunction] Used to set the value of a variable or dialplan function (for access from lua, don't call directly) | |
static int | lua_sort_extensions (lua_State *L) |
Store the sort order of each context. | |
void | lua_state_destroy (void *data) |
The destructor for lua_datastore. | |
static void | lua_update_registry (lua_State *L, const char *context, const char *exten, int priority) |
Update the lua registry with the given context, exten, and priority. | |
static int | matchmore (struct ast_channel *chan, const char *context, const char *exten, int priority, const char *callerid, const char *data) |
static int | reload (void) |
static int | unload_module (void) |
Variables | |
static struct ast_module_info __MODULE_INFO_SECTION | __mod_info = { __MODULE_INFO_GLOBALS .name = AST_MODULE, .flags = AST_MODFLAG_GLOBAL_SYMBOLS , .description = "Lua PBX Switch" , .key = ASTERISK_GPL_KEY , .buildopt_sum = AST_BUILDOPT_SUM, .load = load_module, .unload = unload_module, .reload = reload, } |
static struct ast_module_info * | ast_module_info = &__mod_info |
static char * | config = "extensions.lua" |
char * | config_file_data = NULL |
static ast_mutex_t | config_file_lock = AST_MUTEX_INIT_VALUE |
long | config_file_size = 0 |
static struct ast_context * | local_contexts = NULL |
static struct ast_hashtab * | local_table = NULL |
static struct ast_datastore_info | lua_datastore |
static struct ast_switch | lua_switch |
static char * | registrar = "pbx_lua" |
Lua PBX Switch.
Definition in file pbx_lua.c.
#define LUA_BUF_SIZE 4096 |
Definition at line 53 of file pbx_lua.c.
Referenced by lua_get_variable(), and lua_get_variable_value().
#define LUA_EXT_DATA_SIZE 256 |
Definition at line 52 of file pbx_lua.c.
Referenced by lua_func_read(), and lua_pbx_exec().
static int canmatch | ( | struct ast_channel * | chan, |
const char * | context, | ||
const char * | exten, | ||
int | priority, | ||
const char * | callerid, | ||
const char * | data | ||
) | [static] |
Definition at line 1161 of file pbx_lua.c.
References ast_log(), ast_module_user_add, ast_module_user_remove, LOG_ERROR, lua_find_extension(), and lua_get_state().
Referenced by lua_find_extension().
{ int res; lua_State *L; struct ast_module_user *u = ast_module_user_add(chan); if (!u) { ast_log(LOG_ERROR, "Error adjusting use count, probably could not allocate memory\n"); return 0; } L = lua_get_state(chan); if (!L) { ast_module_user_remove(u); return 0; } res = lua_find_extension(L, context, exten, priority, &canmatch, 0); if (!chan) lua_close(L); ast_module_user_remove(u); return res; }
static int exec | ( | struct ast_channel * | chan, |
const char * | context, | ||
const char * | exten, | ||
int | priority, | ||
const char * | callerid, | ||
const char * | data | ||
) | [static] |
Definition at line 1208 of file pbx_lua.c.
References ast_log(), ast_module_user_add, ast_module_user_remove, exists(), LOG_ERROR, lua_error_function(), lua_find_extension(), lua_get_state(), and lua_update_registry().
{ int res, error_func; lua_State *L; struct ast_module_user *u = ast_module_user_add(chan); if (!u) { ast_log(LOG_ERROR, "Error adjusting use count, probably could not allocate memory\n"); return -1; } L = lua_get_state(chan); if (!L) { ast_module_user_remove(u); return -1; } lua_pushcfunction(L, &lua_error_function); error_func = lua_gettop(L); /* push the extension function onto the stack */ if (!lua_find_extension(L, context, exten, priority, &exists, 1)) { lua_pop(L, 1); /* pop the debug function */ ast_log(LOG_ERROR, "Could not find extension %s in context %s\n", exten, context); if (!chan) lua_close(L); ast_module_user_remove(u); return -1; } lua_update_registry(L, context, exten, priority); lua_pushstring(L, context); lua_pushstring(L, exten); res = lua_pcall(L, 2, 0, error_func); if (res) { if (res == LUA_ERRRUN) { res = -1; if (lua_isnumber(L, -1)) { res = lua_tointeger(L, -1); } else if (lua_isstring(L, -1)) { const char *error = lua_tostring(L, -1); ast_log(LOG_ERROR, "Error executing lua extension: %s\n", error); } } else if (res == LUA_ERRERR) { res = -1; ast_log(LOG_ERROR, "Error in the lua error handler (this is probably a bug in pbx_lua)\n"); } else if (res == LUA_ERRMEM) { res = -1; ast_log(LOG_ERROR, "Memory allocation error\n"); } lua_pop(L, 1); } lua_remove(L, error_func); if (!chan) lua_close(L); ast_module_user_remove(u); return res; }
static int exists | ( | struct ast_channel * | chan, |
const char * | context, | ||
const char * | exten, | ||
int | priority, | ||
const char * | callerid, | ||
const char * | data | ||
) | [static] |
Definition at line 1138 of file pbx_lua.c.
References ast_log(), ast_module_user_add, ast_module_user_remove, LOG_ERROR, lua_find_extension(), and lua_get_state().
Referenced by exec().
{ int res; lua_State *L; struct ast_module_user *u = ast_module_user_add(chan); if (!u) { ast_log(LOG_ERROR, "Error adjusting use count, probably could not allocate memory\n"); return 0; } L = lua_get_state(chan); if (!L) { ast_module_user_remove(u); return 0; } res = lua_find_extension(L, context, exten, priority, &exists, 0); if (!chan) lua_close(L); ast_module_user_remove(u); return res; }
static int load_module | ( | void | ) | [static] |
Definition at line 1455 of file pbx_lua.c.
References ast_log(), AST_MODULE_LOAD_DECLINE, AST_MODULE_LOAD_SUCCESS, ast_register_switch(), load_or_reload_lua_stuff(), and LOG_ERROR.
{ int res; if ((res = load_or_reload_lua_stuff())) return res; if (ast_register_switch(&lua_switch)) { ast_log(LOG_ERROR, "Unable to register LUA PBX switch\n"); return AST_MODULE_LOAD_DECLINE; } return AST_MODULE_LOAD_SUCCESS; }
static int load_or_reload_lua_stuff | ( | void | ) | [static] |
Definition at line 1422 of file pbx_lua.c.
References ast_log(), AST_MODULE_LOAD_DECLINE, AST_MODULE_LOAD_SUCCESS, LOG_ERROR, and lua_reload_extensions().
Referenced by load_module(), and reload().
{ int res = AST_MODULE_LOAD_SUCCESS; lua_State *L = luaL_newstate(); if (!L) { ast_log(LOG_ERROR, "Error allocating lua_State, no memory\n"); return AST_MODULE_LOAD_DECLINE; } if (lua_reload_extensions(L)) { const char *error = lua_tostring(L, -1); ast_log(LOG_ERROR, "Error loading extensions.lua: %s\n", error); res = AST_MODULE_LOAD_DECLINE; } lua_close(L); return res; }
static int lua_autoservice_start | ( | lua_State * | L | ) | [static] |
[lua_CFunction] Tell pbx_lua to maintain an autoservice on this channel (for access from lua, don't call directly)
L | the lua_State to use |
This function will set a flag that will cause pbx_lua to maintain an autoservice on this channel. The autoservice will automatically be stopped and restarted before calling applications and functions.
Definition at line 637 of file pbx_lua.c.
References ast_autoservice_start(), and chan.
Referenced by lua_create_autoservice_functions().
{ struct ast_channel *chan; int res; lua_getfield(L, LUA_REGISTRYINDEX, "channel"); chan = lua_touserdata(L, -1); lua_pop(L, 1); res = ast_autoservice_start(chan); lua_pushboolean(L, !res); lua_setfield(L, LUA_REGISTRYINDEX, "autoservice"); lua_pushboolean(L, !res); return 1; }
static int lua_autoservice_status | ( | lua_State * | L | ) | [static] |
[lua_CFunction] Get the status of the autoservice flag (for access from lua, don't call directly)
L | the lua_State to use |
Definition at line 695 of file pbx_lua.c.
Referenced by lua_create_autoservice_functions().
{ lua_getfield(L, LUA_REGISTRYINDEX, "autoservice"); return 1; }
static int lua_autoservice_stop | ( | lua_State * | L | ) | [static] |
[lua_CFunction] Tell pbx_lua to stop maintaning an autoservice on this channel (for access from lua, don't call directly)
L | the lua_State to use |
This function will stop any autoservice running and turn off the autoservice flag. If this function returns false, it's probably because no autoservice was running to begin with.
Definition at line 668 of file pbx_lua.c.
References ast_autoservice_stop(), and chan.
Referenced by lua_create_autoservice_functions().
{ struct ast_channel *chan; int res; lua_getfield(L, LUA_REGISTRYINDEX, "channel"); chan = lua_touserdata(L, -1); lua_pop(L, 1); res = ast_autoservice_stop(chan); lua_pushboolean(L, 0); lua_setfield(L, LUA_REGISTRYINDEX, "autoservice"); lua_pushboolean(L, !res); return 1; }
static int lua_check_hangup | ( | lua_State * | L | ) | [static] |
[lua_CFunction] Check if this channel has been hungup or not (for access from lua, don't call directly)
L | the lua_State to use |
Definition at line 709 of file pbx_lua.c.
References ast_check_hangup(), and chan.
Referenced by lua_create_hangup_function().
{ struct ast_channel *chan; lua_getfield(L, LUA_REGISTRYINDEX, "channel"); chan = lua_touserdata(L, -1); lua_pop(L, 1); lua_pushboolean(L, ast_check_hangup(chan)); return 1; }
static void lua_create_app_table | ( | lua_State * | L | ) | [static] |
Create the global 'app' table for executing applications.
L | the lua_State to use |
Definition at line 398 of file pbx_lua.c.
References lua_pbx_findapp().
Referenced by lua_load_extensions().
{ lua_newtable(L); luaL_newmetatable(L, "app"); lua_pushstring(L, "__index"); lua_pushcfunction(L, &lua_pbx_findapp); lua_settable(L, -3); lua_setmetatable(L, -2); lua_setglobal(L, "app"); }
static void lua_create_application_metatable | ( | lua_State * | L | ) | [static] |
Create the 'application' metatable, used to execute asterisk applications from lua.
L | the lua_State to use |
Definition at line 455 of file pbx_lua.c.
References lua_pbx_exec().
Referenced by lua_load_extensions().
{ luaL_newmetatable(L, "application"); lua_pushstring(L, "__call"); lua_pushcfunction(L, &lua_pbx_exec); lua_settable(L, -3); lua_pop(L, 1); }
static void lua_create_autoservice_functions | ( | lua_State * | L | ) | [static] |
Create the autoservice functions.
L | the lua_State to use |
Definition at line 471 of file pbx_lua.c.
References lua_autoservice_start(), lua_autoservice_status(), and lua_autoservice_stop().
Referenced by lua_load_extensions().
{ lua_pushcfunction(L, &lua_autoservice_start); lua_setglobal(L, "autoservice_start"); lua_pushcfunction(L, &lua_autoservice_stop); lua_setglobal(L, "autoservice_stop"); lua_pushcfunction(L, &lua_autoservice_status); lua_setglobal(L, "autoservice_status"); lua_pushboolean(L, 0); lua_setfield(L, LUA_REGISTRYINDEX, "autoservice"); }
static void lua_create_channel_table | ( | lua_State * | L | ) | [static] |
Create the global 'channel' table for accesing channel variables.
L | the lua_State to use |
Definition at line 416 of file pbx_lua.c.
References lua_get_variable(), and lua_set_variable().
Referenced by lua_load_extensions().
{ lua_newtable(L); luaL_newmetatable(L, "channel_data"); lua_pushstring(L, "__index"); lua_pushcfunction(L, &lua_get_variable); lua_settable(L, -3); lua_pushstring(L, "__newindex"); lua_pushcfunction(L, &lua_set_variable); lua_settable(L, -3); lua_setmetatable(L, -2); lua_setglobal(L, "channel"); }
static void lua_create_hangup_function | ( | lua_State * | L | ) | [static] |
Create the hangup check function.
L | the lua_State to use |
Definition at line 491 of file pbx_lua.c.
References lua_check_hangup().
Referenced by lua_load_extensions().
{ lua_pushcfunction(L, &lua_check_hangup); lua_setglobal(L, "check_hangup"); }
static void lua_create_variable_metatable | ( | lua_State * | L | ) | [static] |
Create the 'variable' metatable, used to retrieve channel variables.
L | the lua_State to use |
Definition at line 438 of file pbx_lua.c.
References lua_func_read().
Referenced by lua_load_extensions().
{ luaL_newmetatable(L, "variable"); lua_pushstring(L, "__call"); lua_pushcfunction(L, &lua_func_read); lua_settable(L, -3); lua_pop(L, 1); }
static int lua_error_function | ( | lua_State * | L | ) | [static] |
[lua_CFunction] Handle lua errors (for access from lua, don't call directly)
L | the lua_State to use |
Definition at line 726 of file pbx_lua.c.
Referenced by exec().
{ int message_index; /* pass number arguments right through back to asterisk*/ if (lua_isnumber(L, -1)) { return 1; } /* if we are here then we have a string error message, let's attach a * backtrace to it */ message_index = lua_gettop(L); lua_getglobal(L, "debug"); lua_getfield(L, -1, "traceback"); lua_remove(L, -2); /* remove the 'debug' table */ lua_pushvalue(L, message_index); lua_remove(L, message_index); lua_pushnumber(L, 2); lua_call(L, 2, 1); return 1; }
static int lua_extension_cmp | ( | lua_State * | L | ) | [static] |
[lua_CFunction] Compare two extensions (for access from lua, don't call directly)
This function returns true if the first extension passed should match after the second. It behaves like the '<' operator.
Definition at line 897 of file pbx_lua.c.
References ast_extension_cmp().
Referenced by lua_sort_extensions().
{ const char *a = luaL_checkstring(L, -2); const char *b = luaL_checkstring(L, -1); if (ast_extension_cmp(a, b) == -1) lua_pushboolean(L, 1); else lua_pushboolean(L, 0); return 1; }
static int lua_find_extension | ( | lua_State * | L, |
const char * | context, | ||
const char * | exten, | ||
int | priority, | ||
ast_switch_f * | func, | ||
int | push_func | ||
) | [static] |
Locate an extensions and optionally push the matching function on the stack.
L | the lua_State to use |
context | the context to look in |
exten | the extension to look up |
priority | the priority to check, '1' is the only valid priority |
func | the calling func, used to adjust matching behavior between, match, canmatch, and matchmore |
push_func | whether or not to push the lua function for the given extension onto the stack |
Definition at line 1279 of file pbx_lua.c.
References ast_debug, ast_extension_close(), ast_extension_match(), ast_log(), canmatch(), E_CANMATCH, E_MATCHMORE, LOG_ERROR, match(), and matchmore().
Referenced by canmatch(), exec(), exists(), and matchmore().
{ int context_table, context_order_table, i; ast_debug(2, "Looking up %s@%s:%i\n", exten, context, priority); if (priority != 1) return 0; /* load the 'extensions' table */ lua_getglobal(L, "extensions"); if (lua_isnil(L, -1)) { ast_log(LOG_ERROR, "Unable to find 'extensions' table in extensions.lua\n"); lua_pop(L, 1); return 0; } /* load the given context */ lua_getfield(L, -1, context); if (lua_isnil(L, -1)) { lua_pop(L, 2); return 0; } /* remove the extensions table */ lua_remove(L, -2); context_table = lua_gettop(L); /* load the extensions order table for this context */ lua_getfield(L, LUA_REGISTRYINDEX, "extensions_order"); lua_getfield(L, -1, context); lua_remove(L, -2); /* remove the extensions order table */ context_order_table = lua_gettop(L); /* step through the extensions looking for a match */ for (i = 1; i < lua_objlen(L, context_order_table) + 1; i++) { int e_index, e_index_copy, match = 0; const char *e; lua_pushinteger(L, i); lua_gettable(L, context_order_table); e_index = lua_gettop(L); /* copy the key at the top of the stack for use later */ lua_pushvalue(L, -1); e_index_copy = lua_gettop(L); if (!(e = lua_tostring(L, e_index_copy))) { lua_pop(L, 2); continue; } /* make sure this is not the 'include' extension */ if (!strcasecmp(e, "include")) { lua_pop(L, 2); continue; } if (func == &matchmore) match = ast_extension_close(e, exten, E_MATCHMORE); else if (func == &canmatch) match = ast_extension_close(e, exten, E_CANMATCH); else match = ast_extension_match(e, exten); /* the extension matching functions return 0 on fail, 1 on * match, 2 on earlymatch */ if (!match) { /* pop the copy and the extension */ lua_pop(L, 2); continue; /* keep trying */ } if (func == &matchmore && match == 2) { /* We match an extension ending in '!'. The decision in * this case is final and counts as no match. */ lua_pop(L, 4); return 0; } /* remove the context table, the context order table, the * extension, and the extension copy (or replace the extension * with the corresponding function) */ if (push_func) { lua_pop(L, 1); /* pop the copy */ lua_gettable(L, context_table); lua_insert(L, -3); lua_pop(L, 2); } else { lua_pop(L, 4); } return 1; } /* load the includes for this context */ lua_getfield(L, context_table, "include"); if (lua_isnil(L, -1)) { lua_pop(L, 3); return 0; } /* remove the context and the order table*/ lua_remove(L, context_order_table); lua_remove(L, context_table); /* Now try any includes we have in this context */ for (lua_pushnil(L); lua_next(L, -2); lua_pop(L, 1)) { const char *c = lua_tostring(L, -1); if (!c) continue; if (lua_find_extension(L, c, exten, priority, func, push_func)) { /* remove the value, the key, and the includes table * from the stack. Leave the function behind if * necessary */ if (push_func) lua_insert(L, -4); lua_pop(L, 3); return 1; } } /* pop the includes table */ lua_pop(L, 1); return 0; }
static void lua_free_extensions | ( | void | ) | [static] |
Free the internal extensions buffer.
Definition at line 1055 of file pbx_lua.c.
References ast_free, ast_mutex_lock(), ast_mutex_unlock(), and config_file_lock.
Referenced by unload_module().
static int lua_func_read | ( | lua_State * | L | ) | [static] |
[lua_CFunction] Create a 'variable' object for accessing a dialplan function (for access from lua, don't call directly)
This function is called to create a 'variable' object to access a dialplan function. It would be called in the following example as would be seen in extensions.lua.
channel.func("arg1", "arg2", "arg3")
To actually do anything with the resulting value you must use the 'get()' and 'set()' methods (the reason is the resulting value is not a value, but an object in the form of a lua table).
Definition at line 590 of file pbx_lua.c.
References ast_build_string(), ast_strdupa, LUA_EXT_DATA_SIZE, lua_push_variable_table(), and name.
Referenced by lua_create_variable_metatable().
{ int nargs = lua_gettop(L); char fullname[LUA_EXT_DATA_SIZE] = ""; char *fullname_next = fullname, *name; size_t fullname_left = sizeof(fullname); lua_getfield(L, 1, "name"); name = ast_strdupa(lua_tostring(L, -1)); lua_pop(L, 1); ast_build_string(&fullname_next, &fullname_left, "%s(", name); if (nargs > 1) { int i; if (!lua_isnil(L, 2)) ast_build_string(&fullname_next, &fullname_left, "%s", luaL_checkstring(L, 2)); for (i = 3; i <= nargs; i++) { if (lua_isnil(L, i)) ast_build_string(&fullname_next, &fullname_left, ","); else ast_build_string(&fullname_next, &fullname_left, ",%s", luaL_checkstring(L, i)); } } ast_build_string(&fullname_next, &fullname_left, ")"); lua_push_variable_table(L, fullname); return 1; }
static lua_State * lua_get_state | ( | struct ast_channel * | chan | ) | [static] |
Get the lua_State for this channel.
If no channel is passed then a new state is allocated. States with no channel assocatied with them should only be used for matching extensions. If the channel does not yet have a lua state associated with it, one will be created.
Definition at line 1076 of file pbx_lua.c.
References ast_channel_datastore_add(), ast_channel_datastore_find(), ast_channel_datastore_remove(), ast_channel_lock, ast_channel_unlock, ast_datastore_alloc(), ast_datastore_free(), ast_log(), ast_datastore::data, LOG_ERROR, lua_load_extensions(), and ast_channel::name.
Referenced by canmatch(), exec(), exists(), and matchmore().
{ struct ast_datastore *datastore = NULL; lua_State *L; if (!chan) { lua_State *L = luaL_newstate(); if (!L) { ast_log(LOG_ERROR, "Error allocating lua_State, no memory\n"); return NULL; } if (lua_load_extensions(L, NULL)) { const char *error = lua_tostring(L, -1); ast_log(LOG_ERROR, "Error loading extensions.lua: %s\n", error); lua_close(L); return NULL; } return L; } else { ast_channel_lock(chan); datastore = ast_channel_datastore_find(chan, &lua_datastore, NULL); ast_channel_unlock(chan); if (!datastore) { /* nothing found, allocate a new lua state */ datastore = ast_datastore_alloc(&lua_datastore, NULL); if (!datastore) { ast_log(LOG_ERROR, "Error allocation channel datastore for lua_State\n"); return NULL; } datastore->data = luaL_newstate(); if (!datastore->data) { ast_datastore_free(datastore); ast_log(LOG_ERROR, "Error allocating lua_State, no memory\n"); return NULL; } ast_channel_lock(chan); ast_channel_datastore_add(chan, datastore); ast_channel_unlock(chan); L = datastore->data; if (lua_load_extensions(L, chan)) { const char *error = lua_tostring(L, -1); ast_log(LOG_ERROR, "Error loading extensions.lua for %s: %s\n", chan->name, error); ast_channel_lock(chan); ast_channel_datastore_remove(chan, datastore); ast_channel_unlock(chan); ast_datastore_free(datastore); return NULL; } } return datastore->data; } }
static int lua_get_variable | ( | lua_State * | L | ) | [static] |
[lua_CFunction] Return a lua 'variable' object (for access from lua, don't call directly)
This function is called to lookup a variable construct a 'variable' object. It would be called in the following example as would be seen in extensions.lua.
channel.variable
Definition at line 509 of file pbx_lua.c.
References ast_strdupa, ast_strlen_zero(), chan, LUA_BUF_SIZE, lua_push_variable_table(), name, pbx_retrieve_variable(), and ast_channel::varshead.
Referenced by lua_create_channel_table().
{ struct ast_channel *chan; char *name = ast_strdupa(luaL_checkstring(L, 2)); char *value = NULL; char *workspace = alloca(LUA_BUF_SIZE); workspace[0] = '\0'; lua_getfield(L, LUA_REGISTRYINDEX, "channel"); chan = lua_touserdata(L, -1); lua_pop(L, 1); lua_push_variable_table(L, name); /* if this is not a request for a dialplan funciton attempt to retrieve * the value of the variable */ if (!ast_strlen_zero(name) && name[strlen(name) - 1] != ')') { pbx_retrieve_variable(chan, name, &value, workspace, LUA_BUF_SIZE, &chan->varshead); } if (value) { lua_pushstring(L, value); lua_setfield(L, -2, "value"); } return 1; }
static int lua_get_variable_value | ( | lua_State * | L | ) | [static] |
[lua_CFunction] Used to get the value of a variable or dialplan function (for access from lua, don't call directly)
The value of the variable or function is returned. This function is the 'get()' function in the following example as would be seen in extensions.lua.
channel.variable:get()
Definition at line 254 of file pbx_lua.c.
References ast_autoservice_start(), ast_autoservice_stop(), ast_func_read(), ast_strdupa, ast_strlen_zero(), chan, LUA_BUF_SIZE, name, pbx_retrieve_variable(), and ast_channel::varshead.
Referenced by lua_push_variable_table().
{ struct ast_channel *chan; char *value = NULL, *name; char *workspace = alloca(LUA_BUF_SIZE); int autoservice; workspace[0] = '\0'; if (!lua_istable(L, 1)) { lua_pushstring(L, "User probably used '.' instead of ':' for retrieving a channel variable value"); return lua_error(L); } lua_getfield(L, LUA_REGISTRYINDEX, "channel"); chan = lua_touserdata(L, -1); lua_pop(L, 1); lua_getfield(L, 1, "name"); name = ast_strdupa(lua_tostring(L, -1)); lua_pop(L, 1); lua_getfield(L, LUA_REGISTRYINDEX, "autoservice"); autoservice = lua_toboolean(L, -1); lua_pop(L, 1); if (autoservice) ast_autoservice_stop(chan); /* if this is a dialplan function then use ast_func_read(), otherwise * use pbx_retrieve_variable() */ if (!ast_strlen_zero(name) && name[strlen(name) - 1] == ')') { value = ast_func_read(chan, name, workspace, LUA_BUF_SIZE) ? NULL : workspace; } else { pbx_retrieve_variable(chan, name, &value, workspace, LUA_BUF_SIZE, &chan->varshead); } if (autoservice) ast_autoservice_start(chan); if (value) { lua_pushstring(L, value); } else { lua_pushnil(L); } return 1; }
static int lua_load_extensions | ( | lua_State * | L, |
struct ast_channel * | chan | ||
) | [static] |
Load the extensions.lua file from the internal buffer.
L | the lua_State to use |
chan | channel to work on |
This function also sets up some constructs used by the extensions.lua file. In the event of an error, an error string will be pushed onto the lua stack.
0 | success |
1 | failure |
Definition at line 977 of file pbx_lua.c.
References ast_mutex_lock(), ast_mutex_unlock(), config_file_lock, lua_create_app_table(), lua_create_application_metatable(), lua_create_autoservice_functions(), lua_create_channel_table(), lua_create_hangup_function(), lua_create_variable_metatable(), and lua_sort_extensions().
Referenced by lua_get_state().
{ /* store a pointer to this channel */ lua_pushlightuserdata(L, chan); lua_setfield(L, LUA_REGISTRYINDEX, "channel"); luaL_openlibs(L); /* load and sort extensions */ ast_mutex_lock(&config_file_lock); if (luaL_loadbuffer(L, config_file_data, config_file_size, "extensions.lua") || lua_pcall(L, 0, LUA_MULTRET, 0) || lua_sort_extensions(L)) { ast_mutex_unlock(&config_file_lock); return 1; } ast_mutex_unlock(&config_file_lock); /* now we setup special tables and functions */ lua_create_app_table(L); lua_create_channel_table(L); lua_create_variable_metatable(L); lua_create_application_metatable(L); lua_create_autoservice_functions(L); lua_create_hangup_function(L); return 0; }
static int lua_pbx_exec | ( | lua_State * | L | ) | [static] |
[lua_CFunction] This function is part of the 'application' metatable and is used to execute applications similar to pbx_exec() (for access from lua, don't call directly)
L | the lua_State to use |
This funciton is executed as the '()' operator for apps accessed through the 'app' table.
app.playback('demo-congrats')
Definition at line 159 of file pbx_lua.c.
References app, ast_autoservice_start(), ast_autoservice_stop(), ast_build_string(), ast_strdupa, ast_verb, chan, COLOR_BRCYAN, COLOR_BRMAGENTA, context, exten, LUA_EXT_DATA_SIZE, ast_channel::name, pbx_exec(), pbx_findapp(), and term_color().
Referenced by lua_create_application_metatable().
{ int res, nargs = lua_gettop(L); char data[LUA_EXT_DATA_SIZE] = ""; char *data_next = data, *app_name; char *context, *exten; char tmp[80], tmp2[80], tmp3[LUA_EXT_DATA_SIZE]; int priority, autoservice; size_t data_left = sizeof(data); struct ast_app *app; struct ast_channel *chan; lua_getfield(L, 1, "name"); app_name = ast_strdupa(lua_tostring(L, -1)); lua_pop(L, 1); if (!(app = pbx_findapp(app_name))) { lua_pushstring(L, "application '"); lua_pushstring(L, app_name); lua_pushstring(L, "' not found"); lua_concat(L, 3); return lua_error(L); } lua_getfield(L, LUA_REGISTRYINDEX, "channel"); chan = lua_touserdata(L, -1); lua_pop(L, 1); lua_getfield(L, LUA_REGISTRYINDEX, "context"); context = ast_strdupa(lua_tostring(L, -1)); lua_pop(L, 1); lua_getfield(L, LUA_REGISTRYINDEX, "exten"); exten = ast_strdupa(lua_tostring(L, -1)); lua_pop(L, 1); lua_getfield(L, LUA_REGISTRYINDEX, "priority"); priority = lua_tointeger(L, -1); lua_pop(L, 1); if (nargs > 1) { int i; if (!lua_isnil(L, 2)) ast_build_string(&data_next, &data_left, "%s", luaL_checkstring(L, 2)); for (i = 3; i <= nargs; i++) { if (lua_isnil(L, i)) ast_build_string(&data_next, &data_left, ","); else ast_build_string(&data_next, &data_left, ",%s", luaL_checkstring(L, i)); } } ast_verb(3, "Executing [%s@%s:%d] %s(\"%s\", \"%s\")\n", exten, context, priority, term_color(tmp, app_name, COLOR_BRCYAN, 0, sizeof(tmp)), term_color(tmp2, chan->name, COLOR_BRMAGENTA, 0, sizeof(tmp2)), term_color(tmp3, data, COLOR_BRMAGENTA, 0, sizeof(tmp3))); lua_getfield(L, LUA_REGISTRYINDEX, "autoservice"); autoservice = lua_toboolean(L, -1); lua_pop(L, 1); if (autoservice) ast_autoservice_stop(chan); res = pbx_exec(chan, app, data); if (autoservice) ast_autoservice_start(chan); /* error executing an application, report it */ if (res) { lua_pushinteger(L, res); return lua_error(L); } return 0; }
static int lua_pbx_findapp | ( | lua_State * | L | ) | [static] |
[lua_CFunction] Find an app and return it in a lua table (for access from lua, don't call directly)
This function would be called in the following example as it would be found in extensions.lua.
app.dial
Definition at line 128 of file pbx_lua.c.
Referenced by lua_create_app_table().
{ const char *app_name = luaL_checkstring(L, 2); lua_newtable(L); lua_pushstring(L, "name"); lua_pushstring(L, app_name); lua_settable(L, -3); luaL_getmetatable(L, "application"); lua_setmetatable(L, -2); return 1; }
static void lua_push_variable_table | ( | lua_State * | L, |
const char * | name | ||
) | [static] |
Push a 'variable' table on the stack for access the channel variable with the given name.
L | the lua_State to use |
name | the name of the variable |
Definition at line 377 of file pbx_lua.c.
References lua_get_variable_value(), and lua_set_variable_value().
Referenced by lua_func_read(), and lua_get_variable().
{ lua_newtable(L); luaL_getmetatable(L, "variable"); lua_setmetatable(L, -2); lua_pushstring(L, name); lua_setfield(L, -2, "name"); lua_pushcfunction(L, &lua_get_variable_value); lua_setfield(L, -2, "get"); lua_pushcfunction(L, &lua_set_variable_value); lua_setfield(L, -2, "set"); }
static char * lua_read_extensions_file | ( | lua_State * | L, |
long * | size | ||
) | [static] |
Load the extensions.lua file in to a buffer and execute the file.
L | the lua_State to use |
size | a pointer to store the size of the buffer |
Definition at line 920 of file pbx_lua.c.
References ast_config_AST_CONFIG_DIR, ast_free, ast_log(), ast_malloc, errno, f, LOG_WARNING, lua_register_switches(), and lua_sort_extensions().
Referenced by lua_reload_extensions().
{ FILE *f; char *data; char *path = alloca(strlen(config) + strlen(ast_config_AST_CONFIG_DIR) + 2); sprintf(path, "%s/%s", ast_config_AST_CONFIG_DIR, config); if (!(f = fopen(path, "r"))) { lua_pushstring(L, "cannot open '"); lua_pushstring(L, path); lua_pushstring(L, "' for reading: "); lua_pushstring(L, strerror(errno)); lua_concat(L, 4); return NULL; } fseek(f, 0l, SEEK_END); *size = ftell(f); fseek(f, 0l, SEEK_SET); if (!(data = ast_malloc(*size))) { *size = 0; fclose(f); lua_pushstring(L, "not enough memory"); return NULL; } if (fread(data, sizeof(char), *size, f) != *size) { ast_log(LOG_WARNING, "fread() failed: %s\n", strerror(errno)); } fclose(f); if (luaL_loadbuffer(L, data, *size, "extensions.lua") || lua_pcall(L, 0, LUA_MULTRET, 0) || lua_sort_extensions(L) || lua_register_switches(L)) { ast_free(data); data = NULL; *size = 0; } return data; }
static int lua_register_switches | ( | lua_State * | L | ) | [static] |
Register dialplan switches for our pbx_lua contexs.
In the event of an error, an error string will be pushed onto the lua stack.
0 | success |
1 | failure |
Definition at line 839 of file pbx_lua.c.
References ast_context_add_switch2(), ast_context_find_or_create(), ast_hashtab_compare_contexts(), ast_hashtab_create(), ast_hashtab_hash_contexts(), ast_hashtab_newsize_java(), ast_hashtab_resize_java(), and context.
Referenced by lua_read_extensions_file().
{ int extensions; struct ast_context *con = NULL; /* create the hash table for our contexts */ /* XXX do we ever need to destroy this? pbx_config does not */ if (!local_table) local_table = ast_hashtab_create(17, ast_hashtab_compare_contexts, ast_hashtab_resize_java, ast_hashtab_newsize_java, ast_hashtab_hash_contexts, 0); /* load the 'extensions' table */ lua_getglobal(L, "extensions"); extensions = lua_gettop(L); if (lua_isnil(L, -1)) { lua_pop(L, 1); lua_pushstring(L, "Unable to find 'extensions' table in extensions.lua\n"); return 1; } /* iterate through the extensions table and register a context and * dialplan switch for each lua context */ for (lua_pushnil(L); lua_next(L, extensions); lua_pop(L, 1)) { int context = lua_gettop(L); int context_name = context - 1; const char *context_str = lua_tostring(L, context_name); /* find or create this context */ con = ast_context_find_or_create(&local_contexts, local_table, context_str, registrar); if (!con) { /* remove extensions table and context key and value */ lua_pop(L, 3); lua_pushstring(L, "Failed to find or create context\n"); return 1; } /* register the switch */ if (ast_context_add_switch2(con, "Lua", "", 0, registrar)) { /* remove extensions table and context key and value */ lua_pop(L, 3); lua_pushstring(L, "Unable to create switch for context\n"); return 1; } } /* remove the extensions table */ lua_pop(L, 1); return 0; }
static int lua_reload_extensions | ( | lua_State * | L | ) | [static] |
Reload the extensions file and update the internal buffers if it loads correctly.
L | the lua_State to use (must be freshly allocated with luaL_newstate(), don't use lua_get_state()) |
Definition at line 1020 of file pbx_lua.c.
References ast_free, ast_merge_contexts_and_delete(), ast_mutex_lock(), ast_mutex_unlock(), config_file_lock, and lua_read_extensions_file().
Referenced by load_or_reload_lua_stuff().
{ long size = 0; char *data = NULL; luaL_openlibs(L); if (!(data = lua_read_extensions_file(L, &size))) { return 1; } ast_mutex_lock(&config_file_lock); if (config_file_data) ast_free(config_file_data); config_file_data = data; config_file_size = size; /* merge our new contexts */ ast_merge_contexts_and_delete(&local_contexts, local_table, registrar); /* merge_contexts_and_delete will actually, at the correct moment, set the global dialplan pointers to your local_contexts and local_table. It then will free up the old tables itself. Just be sure not to hang onto the pointers. */ local_table = NULL; local_contexts = NULL; ast_mutex_unlock(&config_file_lock); return 0; }
static int lua_set_variable | ( | lua_State * | L | ) | [static] |
[lua_CFunction] Set the value of a channel variable or dialplan function (for access from lua, don't call directly)
This function is called to set a variable or dialplan function. It would be called in the following example as would be seen in extensions.lua.
channel.variable = "value"
Definition at line 548 of file pbx_lua.c.
References ast_autoservice_start(), ast_autoservice_stop(), chan, name, and pbx_builtin_setvar_helper().
Referenced by lua_create_channel_table().
{ struct ast_channel *chan; int autoservice; const char *name = luaL_checkstring(L, 2); const char *value = luaL_checkstring(L, 3); lua_getfield(L, LUA_REGISTRYINDEX, "channel"); chan = lua_touserdata(L, -1); lua_pop(L, 1); lua_getfield(L, LUA_REGISTRYINDEX, "autoservice"); autoservice = lua_toboolean(L, -1); lua_pop(L, 1); if (autoservice) ast_autoservice_stop(chan); pbx_builtin_setvar_helper(chan, name, value); if (autoservice) ast_autoservice_start(chan); return 0; }
static int lua_set_variable_value | ( | lua_State * | L | ) | [static] |
[lua_CFunction] Used to set the value of a variable or dialplan function (for access from lua, don't call directly)
This function is the 'set()' function in the following example as would be seen in extensions.lua.
channel.variable:set("value")
Definition at line 314 of file pbx_lua.c.
References ast_autoservice_start(), ast_autoservice_stop(), ast_strdupa, chan, name, and pbx_builtin_setvar_helper().
Referenced by lua_push_variable_table().
{ const char *name, *value; struct ast_channel *chan; int autoservice; if (!lua_istable(L, 1)) { lua_pushstring(L, "User probably used '.' instead of ':' for setting a channel variable"); return lua_error(L); } lua_getfield(L, 1, "name"); name = ast_strdupa(lua_tostring(L, -1)); lua_pop(L, 1); value = luaL_checkstring(L, 2); lua_getfield(L, LUA_REGISTRYINDEX, "channel"); chan = lua_touserdata(L, -1); lua_pop(L, 1); lua_getfield(L, LUA_REGISTRYINDEX, "autoservice"); autoservice = lua_toboolean(L, -1); lua_pop(L, 1); if (autoservice) ast_autoservice_stop(chan); pbx_builtin_setvar_helper(chan, name, value); if (autoservice) ast_autoservice_start(chan); return 0; }
static int lua_sort_extensions | ( | lua_State * | L | ) | [static] |
Store the sort order of each context.
In the event of an error, an error string will be pushed onto the lua stack.
0 | success |
1 | failure |
Definition at line 761 of file pbx_lua.c.
References context, exten, and lua_extension_cmp().
Referenced by lua_load_extensions(), and lua_read_extensions_file().
{ int extensions, extensions_order; /* create the extensions_order table */ lua_newtable(L); lua_setfield(L, LUA_REGISTRYINDEX, "extensions_order"); lua_getfield(L, LUA_REGISTRYINDEX, "extensions_order"); extensions_order = lua_gettop(L); /* sort each context in the extensions table */ /* load the 'extensions' table */ lua_getglobal(L, "extensions"); extensions = lua_gettop(L); if (lua_isnil(L, -1)) { lua_pop(L, 1); lua_pushstring(L, "Unable to find 'extensions' table in extensions.lua\n"); return 1; } /* iterate through the extensions table and create a * matching table (holding the sort order) in the * extensions_order table for each context that is found */ for (lua_pushnil(L); lua_next(L, extensions); lua_pop(L, 1)) { int context = lua_gettop(L); int context_name = context - 1; int context_order; lua_pushvalue(L, context_name); lua_newtable(L); context_order = lua_gettop(L); /* iterate through this context an popluate the corrisponding * table in the extensions_order table */ for (lua_pushnil(L); lua_next(L, context); lua_pop(L, 1)) { int exten = lua_gettop(L) - 1; lua_pushinteger(L, lua_objlen(L, context_order) + 1); lua_pushvalue(L, exten); lua_settable(L, context_order); } lua_settable(L, extensions_order); /* put the context_order table in the extensions_order table */ /* now sort the new table */ /* push the table.sort function */ lua_getglobal(L, "table"); lua_getfield(L, -1, "sort"); lua_remove(L, -2); /* remove the 'table' table */ /* push the context_order table */ lua_pushvalue(L, context_name); lua_gettable(L, extensions_order); /* push the comp function */ lua_pushcfunction(L, &lua_extension_cmp); if (lua_pcall(L, 2, 0, 0)) { lua_insert(L, -5); lua_pop(L, 4); return 1; } } /* remove the extensions table and the extensions_order table */ lua_pop(L, 2); return 0; }
void lua_state_destroy | ( | void * | data | ) |
static void lua_update_registry | ( | lua_State * | L, |
const char * | context, | ||
const char * | exten, | ||
int | priority | ||
) | [static] |
static int matchmore | ( | struct ast_channel * | chan, |
const char * | context, | ||
const char * | exten, | ||
int | priority, | ||
const char * | callerid, | ||
const char * | data | ||
) | [static] |
Definition at line 1184 of file pbx_lua.c.
References ast_log(), ast_module_user_add, ast_module_user_remove, LOG_ERROR, lua_find_extension(), and lua_get_state().
Referenced by complete_dpreply(), and lua_find_extension().
{ int res; lua_State *L; struct ast_module_user *u = ast_module_user_add(chan); if (!u) { ast_log(LOG_ERROR, "Error adjusting use count, probably could not allocate memory\n"); return 0; } L = lua_get_state(chan); if (!L) { ast_module_user_remove(u); return 0; } res = lua_find_extension(L, context, exten, priority, &matchmore, 0); if (!chan) lua_close(L); ast_module_user_remove(u); return res; }
static int reload | ( | void | ) | [static] |
Definition at line 1450 of file pbx_lua.c.
References load_or_reload_lua_stuff().
{ return load_or_reload_lua_stuff(); }
static int unload_module | ( | void | ) | [static] |
Definition at line 1442 of file pbx_lua.c.
References ast_context_destroy(), ast_unregister_switch(), and lua_free_extensions().
{ ast_context_destroy(NULL, registrar); ast_unregister_switch(&lua_switch); lua_free_extensions(); return 0; }
struct ast_module_info __MODULE_INFO_SECTION __mod_info = { __MODULE_INFO_GLOBALS .name = AST_MODULE, .flags = AST_MODFLAG_GLOBAL_SYMBOLS , .description = "Lua PBX Switch" , .key = ASTERISK_GPL_KEY , .buildopt_sum = AST_BUILDOPT_SUM, .load = load_module, .unload = unload_module, .reload = reload, } [static] |
struct ast_module_info* ast_module_info = &__mod_info [static] |
char* config_file_data = NULL |
ast_mutex_t config_file_lock = AST_MUTEX_INIT_VALUE [static] |
Definition at line 95 of file pbx_lua.c.
Referenced by lua_free_extensions(), lua_load_extensions(), and lua_reload_extensions().
long config_file_size = 0 |
struct ast_context* local_contexts = NULL [static] |
struct ast_hashtab* local_table = NULL [static] |
struct ast_datastore_info lua_datastore [static] |
{ .type = "lua", .destroy = lua_state_destroy, }
struct ast_switch lua_switch [static] |