parse_allow.c

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/*
 * $Id: parse_allow.c 4720 2008-08-23 10:56:15Z henningw $
 *
 * Copyright (c) 2004 Juha Heinanen
 *
 * This file is part of Kamailio, a free SIP server.
 *
 * Kamailio 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
 *
 * Kamailio 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
 *
 * History:
 * -------
 * 2006-03-02  parse_allow() parses and cumulates all ALLOW headers (bogdan)
 */

/*!
 * \file
 * \brief SIP message parser
 * \ingroup parser
 */

#include <stdlib.h>
#include <string.h>
#include "../dprint.h"
#include "../mem/mem.h"
#include "parse_allow.h"
#include "parse_methods.h"
#include "msg_parser.h"


/*!
 * \brief This method is used to parse all Allow HF body.
 * \param msg sip msg
 * \return 0 on success,-1 on failure.
 */
int parse_allow(struct sip_msg *msg)
{
   unsigned int allow;
   struct hdr_field  *hdr;
   struct allow_body *ab = 0;

   /* maybe the header is already parsed! */
   if (msg->allow && msg->allow->parsed)
      return 0;

   /* parse to the end in order to get all ALLOW headers */
   if (parse_headers(msg,HDR_EOH_F,0)==-1 || !msg->allow)
      return -1;

   /* bad luck! :-( - we have to parse them */
   allow = 0;
   for( hdr=msg->allow ; hdr ; hdr=hdr->sibling) {
      if (hdr->parsed) {
         allow |= ((struct allow_body*)hdr->parsed)->allow;
         continue;
      }

      ab = (struct allow_body*)pkg_malloc(sizeof(struct allow_body));
      if (ab == 0) {
         LM_ERR("out of pkg_memory\n");
         return -1;
      }

      if (parse_methods(&(hdr->body), &(ab->allow))!=0) {
         LM_ERR("bad allow body header\n"); 
         goto error;
      }
      ab->allow_all = 0;
      hdr->parsed = (void*)ab;
      allow |= ab->allow;
   }

   ((struct allow_body*)msg->allow->parsed)->allow_all = allow;
   return 0;

error:
   if(ab!=0)
      pkg_free(ab);
   return -1;
}