271 lines
6.4 KiB
C
271 lines
6.4 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2005, Digium, Inc.
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*
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* Mark Spencer <markster@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief Enumlookup - lookup entry in ENUM
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*
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* \ingroup applications
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <ctype.h>
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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#include "asterisk/lock.h"
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#include "asterisk/file.h"
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#include "asterisk/logger.h"
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#include "asterisk/channel.h"
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#include "asterisk/pbx.h"
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#include "asterisk/options.h"
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#include "asterisk/config.h"
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#include "asterisk/module.h"
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#include "asterisk/enum.h"
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#include "asterisk/utils.h"
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#include "asterisk/app.h"
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#include "asterisk/options.h"
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static char *tdesc = "ENUM Lookup";
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static char *app = "EnumLookup";
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static char *synopsis = "Lookup number in ENUM";
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static char *descrip =
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" EnumLookup(exten[|option]): Looks up an extension via ENUM and sets\n"
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"the variable 'ENUM'. For VoIP URIs this variable will \n"
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"look like 'TECHNOLOGY/URI' with the appropriate technology.\n"
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"Currently, the enumservices SIP, H323, IAX, IAX2 and TEL are recognized. \n"
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"\nReturns status in the ENUMSTATUS channel variable:\n"
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" ERROR Failed to do a lookup\n"
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" <tech> Technology of the successful lookup: SIP, H323, IAX, IAX2 or TEL\n"
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" BADURI Got URI Asterisk does not understand.\n"
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" The option string may contain zero or the following character:\n"
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" 'j' -- jump to +101 priority if the lookup isn't successful.\n"
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" and jump to +51 priority on a TEL entry.\n";
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#define ENUM_CONFIG "enum.conf"
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static char h323driver[80] = "";
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#define H323DRIVERDEFAULT "H323"
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STANDARD_LOCAL_USER;
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LOCAL_USER_DECL;
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/*--- enumlookup_exec: Look up number in ENUM and return result */
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static int enumlookup_exec(struct ast_channel *chan, void *data)
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{
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int res=0,priority_jump=0;
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char tech[80];
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char dest[80];
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char tmp[256];
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char *c,*t = NULL;
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static int dep_warning=0;
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struct localuser *u;
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char *parse;
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AST_DECLARE_APP_ARGS(args,
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AST_APP_ARG(d);
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AST_APP_ARG(o);
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);
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if (ast_strlen_zero(data)) {
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ast_log(LOG_WARNING, "EnumLookup requires an argument (extension)\n");
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return -1;
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}
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if (!dep_warning) {
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ast_log(LOG_WARNING, "The application EnumLookup is deprecated. Please use the ENUMLOOKUP() function instead.\n");
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dep_warning = 1;
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}
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LOCAL_USER_ADD(u);
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parse = ast_strdupa(data);
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if (!parse) {
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ast_log(LOG_ERROR, "Out of memory!\n");
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LOCAL_USER_REMOVE(u);
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return -1;
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}
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AST_STANDARD_APP_ARGS(args, parse);
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tech[0] = '\0';
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dest[0] = '\0';
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if (args.o) {
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if (strchr(args.o, 'j'))
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priority_jump = 1;
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}
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res = ast_get_enum(chan, args.d, dest, sizeof(dest), tech, sizeof(tech), NULL, NULL);
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if (!res) { /* Failed to do a lookup */
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if (priority_jump || option_priority_jumping) {
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/* Look for a "busy" place */
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ast_goto_if_exists(chan, chan->context, chan->exten, chan->priority + 101);
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}
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pbx_builtin_setvar_helper(chan, "ENUMSTATUS", "ERROR");
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LOCAL_USER_REMOVE(u);
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return 0;
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}
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pbx_builtin_setvar_helper(chan, "ENUMSTATUS", tech);
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/* Parse it out */
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if (res > 0) {
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if (!strcasecmp(tech, "SIP")) {
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c = dest;
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if (!strncmp(c, "sip:", 4))
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c += 4;
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snprintf(tmp, sizeof(tmp), "SIP/%s", c);
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pbx_builtin_setvar_helper(chan, "ENUM", tmp);
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} else if (!strcasecmp(tech, "h323")) {
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c = dest;
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if (!strncmp(c, "h323:", 5))
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c += 5;
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snprintf(tmp, sizeof(tmp), "%s/%s", h323driver, c);
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/* do a s!;.*!! on the H323 URI */
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t = strchr(c,';');
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if (t)
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*t = 0;
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pbx_builtin_setvar_helper(chan, "ENUM", tmp);
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} else if (!strcasecmp(tech, "iax")) {
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c = dest;
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if (!strncmp(c, "iax:", 4))
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c += 4;
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snprintf(tmp, sizeof(tmp), "IAX/%s", c);
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pbx_builtin_setvar_helper(chan, "ENUM", tmp);
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} else if (!strcasecmp(tech, "iax2")) {
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c = dest;
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if (!strncmp(c, "iax2:", 5))
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c += 5;
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snprintf(tmp, sizeof(tmp), "IAX2/%s", c);
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pbx_builtin_setvar_helper(chan, "ENUM", tmp);
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} else if (!strcasecmp(tech, "tel")) {
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c = dest;
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if (!strncmp(c, "tel:", 4))
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c += 4;
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if (c[0] != '+') {
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ast_log(LOG_NOTICE, "tel: uri must start with a \"+\" (got '%s')\n", c);
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res = 0;
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} else {
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/* now copy over the number, skipping all non-digits and stop at ; or NULL */
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t = tmp;
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while( *c && (*c != ';') && (t - tmp < (sizeof(tmp) - 1))) {
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if (isdigit(*c))
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*t++ = *c;
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c++;
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}
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*t = 0;
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pbx_builtin_setvar_helper(chan, "ENUM", tmp);
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ast_log(LOG_NOTICE, "tel: ENUM set to \"%s\"\n", tmp);
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if (priority_jump || option_priority_jumping) {
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if (ast_goto_if_exists(chan, chan->context, chan->exten, chan->priority + 51))
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res = 0;
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}
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}
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} else if (!ast_strlen_zero(tech)) {
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ast_log(LOG_NOTICE, "Don't know how to handle technology '%s'\n", tech);
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pbx_builtin_setvar_helper(chan, "ENUMSTATUS", "BADURI");
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res = 0;
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}
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}
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LOCAL_USER_REMOVE(u);
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return 0;
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}
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/*--- load_config: Load enum.conf and find out how to handle H.323 */
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static int load_config(void)
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{
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struct ast_config *cfg;
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char *s;
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cfg = ast_config_load(ENUM_CONFIG);
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if (cfg) {
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if (!(s=ast_variable_retrieve(cfg, "general", "h323driver"))) {
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strncpy(h323driver, H323DRIVERDEFAULT, sizeof(h323driver) - 1);
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} else {
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strncpy(h323driver, s, sizeof(h323driver) - 1);
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}
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ast_config_destroy(cfg);
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return 0;
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}
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ast_log(LOG_NOTICE, "No ENUM Config file, using defaults\n");
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return 0;
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}
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/*--- unload_module: Unload this application from PBX */
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int unload_module(void)
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{
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int res;
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res = ast_unregister_application(app);
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STANDARD_HANGUP_LOCALUSERS;
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return res;
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}
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/*--- load_module: Load this application into PBX */
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int load_module(void)
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{
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int res;
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res = ast_register_application(app, enumlookup_exec, synopsis, descrip);
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if (!res)
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res = load_config();
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return res;
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}
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/*--- reload: Reload configuration file */
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int reload(void)
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{
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return load_config();
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}
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/*--- description: Describe module */
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char *description(void)
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{
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return tdesc;
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}
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int usecount(void)
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{
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int res;
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STANDARD_USECOUNT(res);
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return res;
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}
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char *key()
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{
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return ASTERISK_GPL_KEY;
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}
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