parser/parse_refer_to.c
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 /*
  * 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
  *
  * For a license to use the ser software under conditions
  * other than those described here, or to purchase support for this
  * software, please contact iptel.org by e-mail at the following addresses:
  *    info@iptel.org
  *
  * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  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 "../mem/mem.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 &&
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 	     (parse_headers(msg, HDR_REFER_TO_F,0)==-1 || !msg->refer_to)) {
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  		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");
  		pkg_free(refer_to_b);
  		goto error;
  	}
  	msg->refer_to->parsed = refer_to_b;
  
  	return 0;
  error:
  	return -1;
 }