/*

 * Copyright (C) 2006 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 "parse_from.h"

#include "parse_to.h"

#include <stdlib.h>

#include <string.h>

#include "../dprint.h"

#include "msg_parser.h"

#include "../ut.h"

#include "../errinfo.h"

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

/*

 * This method is used to parse P-Asserted-Identity header (RFC 3325).

 *

 * params: msg : sip msg

 * returns 0 on success,

 *        -1 on failure.

 */

int parse_pai_header( struct sip_msg *msg )

{

  struct to_body* pai_b;

  if ( !msg->pai &&

    (parse_headers(msg, HDR_PAI_F,0)==-1 || !msg->pai)) {

    goto error;

  }

  /* maybe the header is already parsed! */

  if (msg->pai->parsed)

    return 0;

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

  /* first, get some memory */

  pai_b = pkg_malloc(sizeof(struct to_body));

  if (pai_b == NULL) {

    LM_ERR("out of pkg memory\n");

    goto error;

  }

  /* now parse it as a multi name-addr/addr-spec instance header !! */

  parse_multi_to( msg->pai->body.s, msg->pai->body.s + msg->pai->body.len+1,

    pai_b);

  if (pai_b->error == PARSE_ERROR) {

    LM_ERR("failed to parse P-Asserted-Identity header\n");

    pkg_free(pai_b);

    set_err_info(OSER_EC_PARSER, OSER_EL_MEDIUM,

      "error parsing PAI header");

    set_err_reply(400, "bad header");

    goto error;

  }

  /* check header validity */

  msg->pai->parsed = pai_b;

  return 0;

error:

  return -1;

}