![kpfleming](/assets/img/avatar_default.png)
git-svn-id: http://svn.digium.com/svn/asterisk/trunk@135680 f38db490-d61c-443f-a65b-d21fe96a405b
407 lines
10 KiB
C
407 lines
10 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2006
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*
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* Mark Spencer <markster@digium.com>
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* Oleksiy Krivoshey <oleksiyk@gmail.com>
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* Russell Bryant <russelb@clemson.edu>
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* Brett Bryant <bbryant@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 ENUM Functions
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*
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* \author Mark Spencer <markster@digium.com>
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* \author Oleksiy Krivoshey <oleksiyk@gmail.com>
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* \author Russell Bryant <russelb@clemson.edu>
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* \author Brett Bryant <bbryant@digium.com>
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*
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* \arg See also AstENUM
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*
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* \ingroup functions
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*/
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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#include "asterisk/module.h"
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#include "asterisk/channel.h"
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#include "asterisk/pbx.h"
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#include "asterisk/utils.h"
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#include "asterisk/lock.h"
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#include "asterisk/file.h"
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#include "asterisk/enum.h"
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#include "asterisk/app.h"
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static char *synopsis = "Syntax: ENUMLOOKUP(number[,Method-type[,options[,record#[,zone-suffix]]]])\n";
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static int function_enum(struct ast_channel *chan, const char *cmd, char *data,
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char *buf, size_t len)
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{
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AST_DECLARE_APP_ARGS(args,
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AST_APP_ARG(number);
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AST_APP_ARG(tech);
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AST_APP_ARG(options);
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AST_APP_ARG(record);
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AST_APP_ARG(zone);
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);
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int res = 0;
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char tech[80];
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char dest[256] = "", tmp[2] = "", num[AST_MAX_EXTENSION] = "";
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char *s, *p;
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unsigned int record = 1;
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buf[0] = '\0';
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if (ast_strlen_zero(data)) {
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ast_log(LOG_WARNING, "%s", synopsis);
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return -1;
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}
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AST_STANDARD_APP_ARGS(args, data);
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if (args.argc < 1) {
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ast_log(LOG_WARNING, "%s", synopsis);
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return -1;
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}
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if (args.tech && !ast_strlen_zero(args.tech)) {
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ast_copy_string(tech,args.tech, sizeof(tech));
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} else {
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ast_copy_string(tech,"sip",sizeof(tech));
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}
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if (!args.zone) {
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args.zone = "e164.arpa";
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}
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if (!args.options) {
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args.options = "";
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}
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if (args.record) {
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record = atoi(args.record) ? atoi(args.record) : record;
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}
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/* strip any '-' signs from number */
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for (s = p = args.number; *s; s++) {
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if (*s != '-') {
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snprintf(tmp, sizeof(tmp), "%c", *s);
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strncat(num, tmp, sizeof(num) - strlen(num) - 1);
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}
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}
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res = ast_get_enum(chan, num, dest, sizeof(dest), tech, sizeof(tech), args.zone, args.options, record, NULL);
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p = strchr(dest, ':');
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if (p && strcasecmp(tech, "ALL") && !strchr(args.options, 'u')) {
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ast_copy_string(buf, p + 1, len);
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} else {
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ast_copy_string(buf, dest, len);
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}
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return 0;
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}
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unsigned int enum_datastore_id;
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struct enum_result_datastore {
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struct enum_context *context;
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unsigned int id;
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};
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static void erds_destroy(struct enum_result_datastore *data)
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{
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int k;
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for (k = 0; k < data->context->naptr_rrs_count; k++) {
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ast_free(data->context->naptr_rrs[k].result);
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ast_free(data->context->naptr_rrs[k].tech);
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}
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ast_free(data->context->naptr_rrs);
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ast_free(data->context);
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ast_free(data);
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}
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static void erds_destroy_cb(void *data)
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{
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struct enum_result_datastore *erds = data;
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erds_destroy(erds);
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}
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const struct ast_datastore_info enum_result_datastore_info = {
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.type = "ENUMQUERY",
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.destroy = erds_destroy_cb,
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};
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static int enum_query_read(struct ast_channel *chan, const char *cmd, char *data, char *buf, size_t len)
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{
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struct enum_result_datastore *erds;
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struct ast_datastore *datastore;
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char *parse, tech[128], dest[128];
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int res = -1;
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AST_DECLARE_APP_ARGS(args,
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AST_APP_ARG(number);
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AST_APP_ARG(tech);
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AST_APP_ARG(zone);
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);
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if (ast_strlen_zero(data)) {
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ast_log(LOG_WARNING, "ENUMQUERY requires at least a number as an argument...\n");
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goto finish;
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}
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parse = ast_strdupa(data);
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AST_STANDARD_APP_ARGS(args, parse);
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if (!chan) {
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ast_log(LOG_ERROR, "ENUMQUERY cannot be used without a channel!\n");
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goto finish;
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}
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if (!args.zone)
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args.zone = "e164.zone";
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ast_copy_string(tech, args.tech ? args.tech : "sip", sizeof(tech));
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if (!(erds = ast_calloc(1, sizeof(*erds))))
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goto finish;
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if (!(erds->context = ast_calloc(1, sizeof(*erds->context)))) {
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ast_free(erds);
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goto finish;
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}
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erds->id = ast_atomic_fetchadd_int((int *) &enum_datastore_id, 1);
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snprintf(buf, len, "%u", erds->id);
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if (!(datastore = ast_datastore_alloc(&enum_result_datastore_info, buf))) {
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ast_free(erds->context);
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ast_free(erds);
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goto finish;
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}
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ast_get_enum(chan, args.number, dest, sizeof(dest), tech, sizeof(tech), args.zone, "", 1, &erds->context);
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datastore->data = erds;
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ast_channel_lock(chan);
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ast_channel_datastore_add(chan, datastore);
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ast_channel_unlock(chan);
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res = 0;
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finish:
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return res;
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}
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static int enum_result_read(struct ast_channel *chan, const char *cmd, char *data, char *buf, size_t len)
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{
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struct enum_result_datastore *erds;
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struct ast_datastore *datastore;
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char *parse, *p;
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unsigned int num;
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int res = -1, k;
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AST_DECLARE_APP_ARGS(args,
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AST_APP_ARG(id);
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AST_APP_ARG(resultnum);
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);
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if (ast_strlen_zero(data)) {
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ast_log(LOG_WARNING, "ENUMRESULT requires two arguments (id and resultnum)\n");
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goto finish;
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}
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if (!chan) {
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ast_log(LOG_ERROR, "ENUMRESULT can not be used without a channel!\n");
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goto finish;
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}
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parse = ast_strdupa(data);
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AST_STANDARD_APP_ARGS(args, parse);
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if (ast_strlen_zero(args.id)) {
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ast_log(LOG_ERROR, "A result ID must be provided to ENUMRESULT\n");
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goto finish;
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}
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if (ast_strlen_zero(args.resultnum)) {
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ast_log(LOG_ERROR, "A result number must be given to ENUMRESULT!\n");
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goto finish;
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}
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ast_channel_lock(chan);
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datastore = ast_channel_datastore_find(chan, &enum_result_datastore_info, args.id);
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ast_channel_unlock(chan);
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if (!datastore) {
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ast_log(LOG_WARNING, "No ENUM results found for query id!\n");
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goto finish;
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}
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erds = datastore->data;
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if (!strcasecmp(args.resultnum, "getnum")) {
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snprintf(buf, len, "%u", erds->context->naptr_rrs_count);
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res = 0;
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goto finish;
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}
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if (sscanf(args.resultnum, "%u", &num) != 1) {
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ast_log(LOG_ERROR, "Invalid value '%s' for resultnum to ENUMRESULT!\n", args.resultnum);
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goto finish;
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}
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if (!num || num > erds->context->naptr_rrs_count) {
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ast_log(LOG_WARNING, "Result number %u is not valid for ENUM query results for ID %s!\n", num, args.id);
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goto finish;
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}
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for (k = 0; k < erds->context->naptr_rrs_count; k++) {
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if (num - 1 != erds->context->naptr_rrs[k].sort_pos)
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continue;
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p = strchr(erds->context->naptr_rrs[k].result, ':');
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if (p && strcasecmp(erds->context->naptr_rrs[k].tech, "ALL"))
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ast_copy_string(buf, p + 1, len);
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else
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ast_copy_string(buf, erds->context->naptr_rrs[k].result, len);
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break;
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}
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res = 0;
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finish:
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return res;
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}
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static struct ast_custom_function enum_query_function = {
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.name = "ENUMQUERY",
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.synopsis = "Initiate an ENUM query",
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.syntax = "ENUMQUERY(number[,Method-type[,zone-suffix]])",
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.desc = "This will do a ENUM lookup of the given phone number.\n"
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"If no method-tpye is given, the default will be sip. If no\n"
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"zone-suffix is given, the default will be \"e164.arpa\".\n"
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"The result of this function will be a numeric ID that can\n"
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"be used to retrieve the results using the ENUMRESULT function.\n",
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.read = enum_query_read,
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};
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static struct ast_custom_function enum_result_function = {
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.name = "ENUMRESULT",
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.synopsis = "Retrieve results from a ENUMQUERY",
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.syntax = "ENUMRESULT(id,resultnum)",
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.desc = "This function will retrieve results from a previous use\n"
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"of the ENUMQUERY function.\n"
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" id - This argument is the identifier returned by the ENUMQUERY function.\n"
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" resultnum - This is the number of the result that you want to retrieve.\n"
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" Results start at 1. If this argument is specified as \"getnum\",\n"
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" then it will return the total number of results that are available.\n",
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.read = enum_result_read,
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};
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static struct ast_custom_function enum_function = {
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.name = "ENUMLOOKUP",
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.synopsis =
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"General or specific querying of NAPTR records for ENUM or ENUM-like DNS pointers",
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.syntax =
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"ENUMLOOKUP(number[,Method-type[,options[,record#[,zone-suffix]]]])",
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.desc =
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"Option 'c' returns an integer count of the number of NAPTRs of a certain RR type.\n"
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"Combination of 'c' and Method-type of 'ALL' will return a count of all NAPTRs for the record.\n"
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"Option 'u' returns the full URI and does not strip off the URI-scheme.\n"
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"Option 's' triggers ISN specific rewriting\n"
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"Option 'i' looks for branches into an Infrastructure ENUM tree\n"
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"Option 'd' for a direct DNS lookup without any flipping of digits\n"
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"Defaults are: Method-type=sip, no options, record=1, zone-suffix=e164.arpa\n\n"
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"For more information, see doc/asterisk.pdf",
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.read = function_enum,
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};
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static int function_txtcidname(struct ast_channel *chan, const char *cmd,
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char *data, char *buf, size_t len)
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{
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int res;
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AST_DECLARE_APP_ARGS(args,
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AST_APP_ARG(number);
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AST_APP_ARG(zone);
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);
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buf[0] = '\0';
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if (ast_strlen_zero(data)) {
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ast_log(LOG_WARNING, "Syntax: TXTCIDNAME(number[,zone-suffix])\n");
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return -1;
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}
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AST_STANDARD_APP_ARGS(args, data);
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if (args.argc < 1) {
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ast_log(LOG_WARNING, "Syntax: TXTCIDNAME(number[,zone-suffix])\n");
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return -1;
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}
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if (!args.zone) {
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args.zone = "e164.arpa";
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}
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res = ast_get_txt(chan, args.number, buf, len, args.zone);
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return 0;
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}
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static struct ast_custom_function txtcidname_function = {
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.name = "TXTCIDNAME",
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.synopsis = "TXTCIDNAME looks up a caller name via DNS",
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.syntax = "TXTCIDNAME(<number>[,zone-suffix])",
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.desc =
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"This function looks up the given phone number in DNS to retrieve\n"
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"the caller id name. The result will either be blank or be the value\n"
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"found in the TXT record in DNS. The default zone-suffix is e164.arpa.\n",
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.read = function_txtcidname,
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};
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static int unload_module(void)
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{
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int res = 0;
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res |= ast_custom_function_unregister(&enum_result_function);
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res |= ast_custom_function_unregister(&enum_query_function);
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res |= ast_custom_function_unregister(&enum_function);
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res |= ast_custom_function_unregister(&txtcidname_function);
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return res;
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}
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static int load_module(void)
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{
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int res = 0;
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res |= ast_custom_function_register(&enum_result_function);
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res |= ast_custom_function_register(&enum_query_function);
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res |= ast_custom_function_register(&enum_function);
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res |= ast_custom_function_register(&txtcidname_function);
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return res;
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}
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AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "ENUM related dialplan functions");
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