parse_allow.c

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/*
 * Copyright (c) 2004 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#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"

 
int parse_allow_header(struct hdr_field* _hf)
{
        struct allow_body* ab = 0;

        if (!_hf) {
                LOG(L_ERR, "parse_allow_header: Invalid parameter value\n");
                return -1;
        }
        
        /* maybe the header is already parsed! */
        if (_hf->parsed) {
                return 0;
        }

        ab = (struct allow_body*)pkg_malloc(sizeof(struct allow_body));
        if (ab == 0) {
                LOG(L_ERR, "ERROR:parse_allow_header: out of pkg_memory\n");
                return -1;
        }
        memset(ab,'\0', sizeof(struct allow_body));
        
        if (parse_methods(&(_hf->body), &(ab->allow)) !=0 ) {
                LOG(L_ERR, "ERROR:parse_allow_header: bad allow body header\n");                
                goto error;
        }
        
        ab->allow_all = 0;      
        _hf->parsed = (void*)ab;
        return 0;

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

int parse_allow(struct sip_msg *msg)
{       
        unsigned int allow;
        struct hdr_field  *hdr;

        /* 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;
        }
        allow = 0;

        for(hdr = msg->allow ; hdr ; hdr = next_sibling_hdr(hdr)) {
                if (hdr->parsed == 0) {
                        if(parse_allow_header(hdr) < 0) {
                                return -1;
                        }
                }

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


/*
 * Release memory
 */
void free_allow_body(struct allow_body **ab)
{
        if (ab && *ab) {        
                pkg_free(*ab);          
                *ab = 0;
        }
}


void free_allow_header(struct hdr_field* hf)
{
        free_allow_body((struct allow_body**)(void*)(&(hf->parsed)));
}