/*------------------------------------------------------------------------------
*
* Copyright (c) 2011, EURid. All rights reserved.
* The YADIFA TM software product is provided under the BSD 3-clause license:
* 
* Redistribution and use in source and binary forms, with or without 
* modification, are permitted provided that the following conditions
* are met:
*
*        * Redistributions of source code must retain the above copyright 
*          notice, this list of conditions and the following disclaimer.
*        * Redistributions in binary form must reproduce the above copyright 
*          notice, this list of conditions and the following disclaimer in the 
*          documentation and/or other materials provided with the distribution.
*        * Neither the name of EURid nor the names of its contributors may be 
*          used to endorse or promote products derived from this software 
*          without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*------------------------------------------------------------------------------
*
*/
/** @defgroup
 *  @ingroup dnscore
 *  @brief
 *
 *
 *
 * @{
 *
 *----------------------------------------------------------------------------*/

#include <stdlib.h>
#include <arpa/inet.h>
#include <ctype.h>

#include "dnscore-config.h"

#define DNSCORE_NSID_C

#include "dnscore/nsid.h"
#include "dnscore/rfc.h"

static u8 edns0_rdatasize_nsid_option_wire_default[2] = {0,0};

u32 edns0_record_size = EDNS0_RECORD_SIZE;
u8 *edns0_rdatasize_nsid_option_wire = edns0_rdatasize_nsid_option_wire_default;
u32 edns0_rdatasize_nsid_option_wire_size = 2;

void
edns0_set_nsid(u8 *bytes, u16 size)
{
    if(bytes != NULL)
    {
        if(size > EDNS0_NSID_SIZE_MAX)
        {
            return;
        }
        
        u8 *tmp = malloc(2 + 2 + 2 + size);

        if(tmp == NULL)
        {
            return;
        }
        
        tmp[0] = (size + 4) >> 8;
        tmp[1] = (size + 4) & 255;;
        tmp[2] = 0;
        tmp[3] = EDNS0_OPT_3;
        tmp[4] = size >> 8;
        tmp[5] = size & 255;
        memcpy(&tmp[6], bytes, size);
        
        if(edns0_rdatasize_nsid_option_wire != edns0_rdatasize_nsid_option_wire_default)
        {
            free(edns0_rdatasize_nsid_option_wire);
        }
        
        edns0_rdatasize_nsid_option_wire = tmp;
        edns0_rdatasize_nsid_option_wire_size = 6 + size;
        
        edns0_record_size = EDNS0_RECORD_SIZE - 2 + edns0_rdatasize_nsid_option_wire_size;
    }
    else
    {
        if(edns0_rdatasize_nsid_option_wire != edns0_rdatasize_nsid_option_wire_default)
        {
            free(edns0_rdatasize_nsid_option_wire);
            edns0_rdatasize_nsid_option_wire = edns0_rdatasize_nsid_option_wire_default;
            edns0_rdatasize_nsid_option_wire_size = 2;            
            edns0_record_size = EDNS0_RECORD_SIZE;
        }
    }
}

/** @} */
