94 lines
2.7 KiB
C
94 lines
2.7 KiB
C
/**
|
|
* (C) 2007-22 - 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 <stdint.h> // for uint8_t
|
|
#include <string.h> // for memcpy, size_t, memset
|
|
#include <sys/types.h> // for time_t
|
|
#include "n2n.h" // for n2n_trans_op_t, TRACE_DEBUG, traceEvent, N2N_...
|
|
|
|
|
|
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 void transop_tick_null (n2n_trans_op_t *arg, time_t now) {
|
|
|
|
// no tick action
|
|
}
|
|
|
|
|
|
int n2n_transop_null_init (const n2n_edge_conf_t *conf, n2n_trans_op_t *ttt) {
|
|
|
|
memset(ttt, 0, sizeof(n2n_trans_op_t));
|
|
|
|
ttt->transform_id = N2N_TRANSFORM_ID_NULL;
|
|
ttt->no_encryption = 1;
|
|
ttt->deinit = transop_deinit_null;
|
|
ttt->tick = transop_tick_null;
|
|
ttt->fwd = transop_encode_null;
|
|
ttt->rev = transop_decode_null;
|
|
|
|
return 0;
|
|
}
|