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/**
* (C) 2007-18 - ntop.org and contributors
*
* This program 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 3 of the License, or
* (at your option) any later version.
*
* This program 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 see see <http://www.gnu.org/licenses/>
*
*/
#include "n2n.h"
#include "n2n_transforms.h"
static int transop_deinit_null( n2n_trans_op_t * arg )
{
/* nothing to deallocate, nothing to release. */
return 0;
}
static int transop_encode_null( n2n_trans_op_t * arg,
uint8_t * outbuf,
size_t out_len,
const uint8_t * inbuf,
size_t in_len,
const uint8_t * peer_mac)
{
int retval = -1;
traceEvent( TRACE_DEBUG, "encode_null %lu", in_len );
if ( out_len >= in_len )
{
memcpy( outbuf, inbuf, in_len );
retval = in_len;
}
else
{
traceEvent( TRACE_DEBUG, "encode_null %lu too big for packet buffer", in_len );
}
return retval;
}
static int transop_decode_null( n2n_trans_op_t * arg,
uint8_t * outbuf,
size_t out_len,
const uint8_t * inbuf,
size_t in_len,
const uint8_t * peer_mac)
{
int retval = -1;
traceEvent( TRACE_DEBUG, "decode_null %lu", in_len );
if ( out_len >= in_len )
{
memcpy( outbuf, inbuf, in_len );
retval = in_len;
}
else
{
traceEvent( TRACE_DEBUG, "decode_null %lu too big for packet buffer", in_len );
}
return retval;
}
static int transop_addspec_null( n2n_trans_op_t * arg, const n2n_cipherspec_t * cspec )
{
return 0;
}
static n2n_tostat_t transop_tick_null( n2n_trans_op_t * arg, time_t now )
{
n2n_tostat_t r;
r.can_tx=1;
r.tx_spec.t = N2N_TRANSFORM_ID_NULL;
r.tx_spec.valid_from = 0;
r.tx_spec.valid_until = (time_t)(-1);
r.tx_spec.opaque_size=0;
return r;
}
void transop_null_init( n2n_trans_op_t * ttt )
{
memset(ttt, 0, sizeof(n2n_trans_op_t) );
ttt->transform_id = N2N_TRANSFORM_ID_NULL;
ttt->deinit = transop_deinit_null;
ttt->addspec = transop_addspec_null;
ttt->tick = transop_tick_null;
ttt->fwd = transop_encode_null;
ttt->rev = transop_decode_null;
}