kamailio/parser/parse_refer_to.c

/*
 * Copyright (C) 2005 Juha Heinanen
 *
 * This file is part of ser, a free SIP server.
 *
 * ser 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
 *
 * ser 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
 */

/*! \file
 * \brief Parser :: Refert-To: header parser
 *
 * \ingroup parser
 */
 
#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 "../mem/mem.h"

 
/*! \brief
 * 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) {
 		LOG(L_ERR, "ERROR:parse_refer_to_header: out of pkg_memory\n");
 		goto error;
 	}
 
 	/* now parse it!! */
 	memset(refer_to_b, 0, sizeof(struct to_body));
 	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) {
 		LOG(L_ERR, "ERROR:parse_refer_to_header: bad Refer-To header\n");
 		free_to(refer_to_b);
 		goto error;
 	}
 	msg->refer_to->parsed = refer_to_b;
 
 	return 0;
 error:
 	return -1;
}