forked from Mirrors/freeswitch
60434decf5
mod_enum can be used as a dialplan app, an api call from the console or as a dialplan interface.
Dialplan Interface:
put enum as the dialplan parameter in an endpoint module
i.e. instead of "XML" set it to "enum" or "enum,XML" for fall through.
Dialplan App:
This example will do a lookup and set the a variable that is the proper
dialstring to call all of the possible routes in order of preference according to
the lookup and the order of the routes in the enum.conf section.
<extension name="tollfree">
<condition field="destination_number" expression="^(18(0{2}|8{2}|7{2}|6{2})\d{7})$">
<action application="enum" data="$1"/>
<action application="bridge" data="${enum_auto_route}"/>
</condition>
</extension>
You can also pick an alrernate root:
<action application="enum" data="$1 myroot.org"/>
API command:
at the console you can say:
enum <number> [<root>]
The root always defaults to the one in the enum.conf section.
git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@3494 d0543943-73ff-0310-b7d9-9358b9ac24b2
155 lines
4.6 KiB
C
155 lines
4.6 KiB
C
/* $Id: udns_rr_srv.c,v 1.2 2005/09/12 12:26:22 mjt Exp $
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parse/query SRV IN (rfc2782) records
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Copyright (C) 2005 Michael Tokarev <mjt@corpit.ru>
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This file is part of UDNS library, an async DNS stub resolver.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library, in file named COPYING.LGPL; if not,
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write to the Free Software Foundation, Inc., 59 Temple Place,
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Suite 330, Boston, MA 02111-1307 USA
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Copyright 2005 Thadeu Lima de Souza Cascardo <cascardo@minaslivre.org>
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2005-09-11:
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Changed MX parser file into a SRV parser file
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*/
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#include <string.h>
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#include <stdlib.h>
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#include <assert.h>
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#include "udns.h"
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int
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dns_parse_srv(dnscc_t *qdn, dnscc_t *pkt, dnscc_t *cur, dnscc_t *end,
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void **result) {
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struct dns_rr_srv *ret;
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struct dns_parse p;
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struct dns_rr rr;
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int r, l;
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char *sp;
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dnsc_t srv[DNS_MAXDN];
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assert(dns_get16(cur+2) == DNS_C_IN && dns_get16(cur+0) == DNS_T_SRV);
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/* first, validate the answer and count size of the result */
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l = 0;
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dns_initparse(&p, qdn, pkt, cur, end);
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while((r = dns_nextrr(&p, &rr)) > 0) {
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cur = rr.dnsrr_dptr + 6;
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r = dns_getdn(pkt, &cur, end, srv, sizeof(srv));
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if (r <= 0 || cur != rr.dnsrr_dend)
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return DNS_E_PROTOCOL;
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l += dns_dntop_size(srv);
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}
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if (r < 0)
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return DNS_E_PROTOCOL;
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if (!p.dnsp_nrr)
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return DNS_E_NODATA;
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/* next, allocate and set up result */
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l += dns_stdrr_size(&p);
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ret = malloc(sizeof(*ret) + sizeof(struct dns_srv) * p.dnsp_nrr + l);
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if (!ret)
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return DNS_E_NOMEM;
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ret->dnssrv_nrr = p.dnsp_nrr;
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ret->dnssrv_srv = (struct dns_srv *)(ret+1);
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/* and 3rd, fill in result, finally */
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sp = (char*)(ret->dnssrv_srv + p.dnsp_nrr);
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for (dns_rewind(&p, qdn), r = 0; dns_nextrr(&p, &rr); ++r) {
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ret->dnssrv_srv[r].name = sp;
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cur = rr.dnsrr_dptr;
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ret->dnssrv_srv[r].priority = dns_get16(cur);
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ret->dnssrv_srv[r].weight = dns_get16(cur+2);
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ret->dnssrv_srv[r].port = dns_get16(cur+4);
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cur += 6;
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dns_getdn(pkt, &cur, end, srv, sizeof(srv));
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sp += dns_dntop(srv, sp, DNS_MAXNAME);
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}
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dns_stdrr_finish((struct dns_rr_null *)ret, sp, &p);
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*result = ret;
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return 0;
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}
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/* Add a single service or proto name prepending an undescore (_),
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* according to rfc2782 rules.
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* Return 0 or the label length.
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* Routing assumes dn holds enouth space for a single DN label. */
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static unsigned add_sname(dnsc_t *dn, const char *sn) {
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unsigned l;
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l = dns_ptodn(sn, 0, dn + 1, DNS_MAXLABEL-1, NULL);
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if (l <= 1 || l - 2 != dn[1])
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/* Should we really check if sn is exactly one label? Do we care? */
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return 0;
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dn[0] = l - 1;
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dn[1] = '_';
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return l;
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}
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/* Construct a domain name for SRV query from the given name, service and
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* protocol (service may be NULL in which case protocol isn't used).
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* Return negative value on error (malformed query),
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* or addition query flag(s) to use.
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*/
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static int
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build_srv_dn(dnsc_t *dn, const char *name, const char *srv, const char *proto)
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{
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unsigned p = 0, l;
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int isabs;
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if (srv) {
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l = add_sname(dn + p, srv);
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if (!l)
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return -1;
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p += l;
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l = add_sname(dn + p, proto);
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if (!l)
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return -1;
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p += l;
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}
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l = dns_ptodn(name, 0, dn + p, DNS_MAXDN - p, &isabs);
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if (!l)
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return -1;
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return isabs ? DNS_NOSRCH : 0;
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}
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struct dns_query *
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dns_submit_srv(struct dns_ctx *ctx,
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const char *name, const char *srv, const char *proto,
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int flags, dns_query_srv_fn *cbck, void *data) {
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dnsc_t dn[DNS_MAXDN];
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int r = build_srv_dn(dn, name, srv, proto);
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if (r < 0) {
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dns_setstatus (ctx, DNS_E_BADQUERY);
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return NULL;
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}
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return
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dns_submit_dn(ctx, dn, DNS_C_IN, DNS_T_SRV, flags | r,
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dns_parse_srv, (dns_query_fn *)cbck, data);
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}
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struct dns_rr_srv *
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dns_resolve_srv(struct dns_ctx *ctx,
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const char *name, const char *srv, const char *proto, int flags)
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{
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dnsc_t dn[DNS_MAXDN];
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int r = build_srv_dn(dn, name, srv, proto);
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if (r < 0) {
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dns_setstatus(ctx, DNS_E_BADQUERY);
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return NULL;
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}
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return (struct dns_rr_srv *)
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dns_resolve_dn(ctx, dn, DNS_C_IN, DNS_T_SRV, flags | r, dns_parse_srv);
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}
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