149 lines
4.9 KiB
C
149 lines
4.9 KiB
C
/*
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Copyright (C) 2002-2007 Thomas Ries <tries@gmx.net>
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This file is part of Siproxd.
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Siproxd is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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Siproxd 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Siproxd; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "config.h"
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#include <stdio.h>
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#include <string.h>
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#include <netinet/in.h>
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#include <osipparser2/osip_parser.h>
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#include "siproxd.h"
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#include "log.h"
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static char const ident[]="$Id$";
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/* configuration storage */
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extern struct siproxd_config configuration;
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/* local prototypes */
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static int plugin_shortdial_redirect(sip_ticket_t *ticket, int shortcut_no);
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/* returns STS_SIP_SENT if processing is to be terminated,
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* otherwise STS_SUCCESS (go on with processing) */
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/* code (entry point) */
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int plugin_shortdial(sip_ticket_t *ticket) {
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int sts=STS_SUCCESS;
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osip_uri_t *req_url;
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int shortcut_no=0;
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if (!ticket || !ticket->sipmsg) return STS_FAILURE;
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DEBUGC(DBCLASS_PLUGIN,"plugin entered");
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req_url=osip_message_get_uri(ticket->sipmsg);
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/* only outgoing direction is handled */
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sip_find_direction(ticket, NULL);
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if (ticket->direction != DIR_OUTGOING)
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return STS_SUCCESS;
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/* only INVITE and ACK are handled */
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if (!MSG_IS_INVITE(ticket->sipmsg) && !MSG_IS_ACK(ticket->sipmsg))
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return STS_SUCCESS;
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/* REQ URI with username must exist, length as defined in config,
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* shortdial must be enabled and short dial key must match */
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if (!req_url || !req_url->username ||
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!configuration.pi_shortdial_akey ||
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(strlen(req_url->username) != strlen(configuration.pi_shortdial_akey)) ||
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(req_url->username[0] != configuration.pi_shortdial_akey[0]))
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return STS_SUCCESS; /* ignore */
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shortcut_no = atoi(&(req_url->username[1]));
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if ((shortcut_no <= 0) || (shortcut_no >= LONG_MAX)) return STS_SUCCESS; /* not a number */
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/* requested number is not defined (out of range) */
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if (shortcut_no > configuration.pi_shortdial_entry.used) {
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DEBUGC(DBCLASS_PLUGIN, "shortdial: shortcut %i > available shortcuts (%i)",
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shortcut_no, configuration.pi_shortdial_entry.used);
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return STS_SUCCESS;
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}
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/* requested number is not defined (empty) */
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if (!configuration.pi_shortdial_entry.string[shortcut_no-1]) {
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DEBUGC(DBCLASS_PLUGIN, "shortdial: shortcut %i empty", shortcut_no);
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return STS_SUCCESS;
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}
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/*
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* called number does match the short dial specification
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*/
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/* outgoing INVITE request */
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if (MSG_IS_INVITE(ticket->sipmsg)) {
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DEBUGC(DBCLASS_PLUGIN,"processing INVITE");
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sts=plugin_shortdial_redirect(ticket, shortcut_no);
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}
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/* outgoing ACK request: is result of a local 3xx answer (moved...) */
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else if (MSG_IS_ACK(ticket->sipmsg)) {
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/* make sure we only catch ACKs caused by myself (**02 -> *02 legitime) */
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DEBUGC(DBCLASS_PLUGIN,"processing ACK");
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sts=STS_SIP_SENT; /* eat up the ACK that was directed to myself */
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}
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return sts;
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}
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/* private code */
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static int plugin_shortdial_redirect(sip_ticket_t *ticket, int shortcut_no) {
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osip_uri_t *to_url=ticket->sipmsg->to->url;
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char *to_user=to_url->username;
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char *new_to_user=NULL;
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int i;
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size_t len;
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osip_contact_t *contact = NULL;
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new_to_user=configuration.pi_shortdial_entry.string[shortcut_no-1];
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if (!new_to_user) return STS_SUCCESS;
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DEBUGC(DBCLASS_PLUGIN,"redirect: redirecting [%s]->[%s]",
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to_user, new_to_user);
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len=strlen(new_to_user)+1; /* include trailing "\0" */
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/* use a "302 Moved temporarily" response back to the client */
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/* new target is within the Contact Header */
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/* remove all Contact headers in message */
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for (i=0; (contact != NULL) || (i == 0); i++) {
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osip_message_get_contact(ticket->sipmsg, 0, &contact);
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if (contact) {
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osip_list_remove(ticket->sipmsg->contacts,0);
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osip_contact_free(contact);
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}
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} /* for i */
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/* insert one new Contact header containing the new target address */
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osip_contact_init(&contact);
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osip_uri_clone(to_url, &contact->url);
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osip_free(contact->url->username);
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contact->url->username=osip_malloc(len);
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strcpy(contact->url->username, new_to_user);
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osip_list_add(ticket->sipmsg->contacts,contact,0);
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/* sent redirect message back to local client */
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sip_gen_response(ticket, 302 /*Moved temporarily*/);
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return STS_SIP_SENT;
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}
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