/*

 * Copyright (C) 2005 Juha Heinanen

 *

 *

 * This file is part of opensips, a free SIP server.

 *

 * opensips is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version

 *

 * opensips is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA

 */

#include <stdlib.h>

#include <string.h>

#include "../dprint.h"

#include "../ut.h"

#include "../errinfo.h"

#include "../mem/mem.h"

#include "msg_parser.h"

#include "parse_from.h"

#include "parse_to.h"

/*

 * This method is used to parse Refer-To header.

 *

 * params: msg : sip msg

 * returns 0 on success,

 *        -1 on failure.

 */

int parse_refer_to_header( struct sip_msg *msg )

{

  struct to_body* refer_to_b;

  if ( !msg->refer_to &&

  (parse_headers(msg, HDR_REFER_TO_F,0)==-1 || !msg->refer_to)) {

    goto error;

  }

  /* maybe the header is already parsed! */

  if (msg->refer_to->parsed)

    return 0;

  /* bad luck! :-( - we have to parse it */

  /* first, get some memory */

  refer_to_b = pkg_malloc(sizeof(struct to_body));

  if (refer_to_b == 0) {

    LM_ERR("out of pkg_memory\n");

    goto error;

  }

  /* now parse it!! */

  parse_to(msg->refer_to->body.s,

    msg->refer_to->body.s + msg->refer_to->body.len+1,

    refer_to_b);

  if (refer_to_b->error == PARSE_ERROR) {

    LM_ERR("bad Refer-To header\n");

    pkg_free(refer_to_b);

    set_err_info(OSER_EC_PARSER, OSER_EL_MEDIUM,

      "error parsing REFER-TO header");

    set_err_reply(400, "bad headers");

    goto error;

  }

  msg->refer_to->parsed = refer_to_b;

  return 0;

error:

  return -1;

}