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/*
* Asterisk -- A telephony toolkit for Linux.
*
* Enumlookup - lookup entry in ENUM
*
* Copyright (C) 1999 - 2005, Digium, Inc.
*
* Mark Spencer <markster@digium.com>
*
* This program is free software, distributed under the terms of
* the GNU General Public License
*/
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include "asterisk/lock.h"
#include "asterisk/file.h"
#include "asterisk/logger.h"
#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/options.h"
#include "asterisk/config.h"
#include "asterisk/module.h"
#include "asterisk/enum.h"
#include "asterisk/utils.h"
static char *tdesc = "ENUM Lookup";
static char *app = "EnumLookup";
static char *synopsis = "Lookup number in ENUM";
static char *descrip =
" EnumLookup(exten): Looks up an extension via ENUM and sets\n"
"the variable 'ENUM'. For VoIP URIs this variable will \n"
"look like 'TECHNOLOGY/URI' with the appropriate technology.\n"
"Returns -1 on hangup, or 0 on completion\n"
"Currently, the enumservices SIP, H323, IAX, IAX2 and TEL are recognized. \n"
"\nReturns status in the ENUMSTATUS channel variable:\n"
" ERROR Failed to do a lookup\n"
" <tech> Technology of the successful lookup: SIP, H323, IAX, IAX2 or TEL\n"
" BADURI Got URI Asterisk does not understand.\n"
"\nOld, depreciated, behaviour:\n"
"\nA SIP, H323, IAX or IAX2 entry will result in normal priority handling, \n"
"whereas a TEL entry will increase the priority by 51 (if existing).\n"
"If the lookup was *not* successful and there exists a priority n + 101,\n"
"then that priority will be taken next.\n" ;
#define ENUM_CONFIG "enum.conf"
static char h323driver[80] = "";
#define H323DRIVERDEFAULT "H323"
STANDARD_LOCAL_USER;
LOCAL_USER_DECL;
/*--- enumlookup_exec: Look up number in ENUM and return result */
static int enumlookup_exec(struct ast_channel *chan, void *data)
{
int res=0;
char tech[80];
char dest[80];
char tmp[256];
char *c,*t;
struct localuser *u;
if (!data || ast_strlen_zero(data)) {
ast_log(LOG_WARNING, "EnumLookup requires an argument (extension)\n");
res = 0;
}
LOCAL_USER_ADD(u);
if (!res) {
res = ast_get_enum(chan, data, dest, sizeof(dest), tech, sizeof(tech));
printf("ENUM got '%d'\n", res);
}
LOCAL_USER_REMOVE(u);
if (!res) { /* Failed to do a lookup */
/* Look for a "busy" place */
ast_goto_if_exists(chan, chan->context, chan->exten, chan->priority + 101);
pbx_builtin_setvar_helper(chan, "ENUMSTATUS", "ERROR");
return 0;
}
pbx_builtin_setvar_helper(chan, "ENUMSTATUS", tech);
/* Parse it out */
if (res > 0) {
if (!strcasecmp(tech, "SIP")) {
c = dest;
if (!strncmp(c, "sip:", 4))
c += 4;
snprintf(tmp, sizeof(tmp), "SIP/%s", c);
pbx_builtin_setvar_helper(chan, "ENUM", tmp);
} else if (!strcasecmp(tech, "h323")) {
c = dest;
if (!strncmp(c, "h323:", 5))
c += 5;
snprintf(tmp, sizeof(tmp), "%s/%s", h323driver, c);
/* do a s!;.*!! on the H323 URI */
t = strchr(c,';');
if (t)
*t = 0;
pbx_builtin_setvar_helper(chan, "ENUM", tmp);
} else if (!strcasecmp(tech, "iax")) {
c = dest;
if (!strncmp(c, "iax:", 4))
c += 4;
snprintf(tmp, sizeof(tmp), "IAX/%s", c);
pbx_builtin_setvar_helper(chan, "ENUM", tmp);
} else if (!strcasecmp(tech, "iax2")) {
c = dest;
if (!strncmp(c, "iax2:", 5))
c += 5;
snprintf(tmp, sizeof(tmp), "IAX2/%s", c);
pbx_builtin_setvar_helper(chan, "ENUM", tmp);
} else if (!strcasecmp(tech, "tel")) {
c = dest;
if (!strncmp(c, "tel:", 4))
c += 4;
if (c[0] != '+') {
ast_log(LOG_NOTICE, "tel: uri must start with a \"+\" (got '%s')\n", c);
res = 0;
} else {
/* now copy over the number, skipping all non-digits and stop at ; or NULL */
t = tmp;
while( *c && (*c != ';') && (t - tmp < (sizeof(tmp) - 1))) {
if (isdigit(*c))
*t++ = *c;
c++;
}
*t = 0;
pbx_builtin_setvar_helper(chan, "ENUM", tmp);
ast_log(LOG_NOTICE, "tel: ENUM set to \"%s\"\n", tmp);
if (ast_goto_if_exists(chan, chan->context, chan->exten, chan->priority + 51))
res = 0;
}
} else if (!ast_strlen_zero(tech)) {
ast_log(LOG_NOTICE, "Don't know how to handle technology '%s'\n", tech);
pbx_builtin_setvar_helper(chan, "ENUMSTATUS", "BADURI");
res = 0;
}
}
return 0;
}
/*--- load_config: Load enum.conf and find out how to handle H.323 */
static int load_config(void)
{
struct ast_config *cfg;
char *s;
cfg = ast_config_load(ENUM_CONFIG);
if (cfg) {
if (!(s=ast_variable_retrieve(cfg, "general", "h323driver"))) {
strncpy(h323driver, H323DRIVERDEFAULT, sizeof(h323driver) - 1);
} else {
strncpy(h323driver, s, sizeof(h323driver) - 1);
}
ast_config_destroy(cfg);
return 0;
}
ast_log(LOG_NOTICE, "No ENUM Config file, using defaults\n");
return 0;
}
/*--- unload_module: Unload this application from PBX */
int unload_module(void)
{
STANDARD_HANGUP_LOCALUSERS;
return ast_unregister_application(app);
}
/*--- load_module: Load this application into PBX */
int load_module(void)
{
int res;
res = ast_register_application(app, enumlookup_exec, synopsis, descrip);
if (res)
return(res);
if ((res=load_config())) {
return(res);
}
return(0);
}
/*--- reload: Reload configuration file */
int reload(void)
{
return(load_config());
}
/*--- description: Describe module */
char *description(void)
{
return tdesc;
}
int usecount(void)
{
int res;
STANDARD_USECOUNT(res);
return res;
}
char *key()
{
return ASTERISK_GPL_KEY;
}
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