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/* librfid - layer 2 protocol handler
* (C) 2005-2006 by Harald Welte <laforge@gnumonks.org>
*/
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation
*
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <librfid/rfid.h>
#include <librfid/rfid_layer2.h>
static struct rfid_layer2 *rfid_layer2_list;
struct rfid_layer2_handle *
rfid_layer2_init(struct rfid_reader_handle *rh, unsigned int id)
{
struct rfid_layer2 *p;
for (p = rfid_layer2_list; p; p = p->next)
if (p->id == id)
return p->fn.init(rh);
DEBUGP("unable to find matching layer2 protocol\n");
return NULL;
}
int
rfid_layer2_open(struct rfid_layer2_handle *ph)
{
if (!ph->l2->fn.open)
return 0;
return ph->l2->fn.open(ph);
}
int
rfid_layer2_transceive(struct rfid_layer2_handle *ph,
enum rfid_frametype frametype,
const unsigned char *tx_buf, unsigned int len,
unsigned char *rx_buf, unsigned int *rx_len,
u_int64_t timeout, unsigned int flags)
{
if (!ph->l2->fn.transceive)
return -EIO;
return ph->l2->fn.transceive(ph, frametype, tx_buf, len, rx_buf,
rx_len, timeout, flags);
}
int rfid_layer2_fini(struct rfid_layer2_handle *ph)
{
if (!ph->l2->fn.fini)
return 0;
return ph->l2->fn.fini(ph);
}
int
rfid_layer2_close(struct rfid_layer2_handle *ph)
{
if (!ph->l2->fn.close)
return 0;
return ph->l2->fn.close(ph);
}
int
rfid_layer2_register(struct rfid_layer2 *p)
{
p->next = rfid_layer2_list;
rfid_layer2_list = p;
return 0;
}
int
rfid_layer2_getopt(struct rfid_layer2_handle *ph, int optname,
void *optval, unsigned int *optlen)
{
if (optname >> 16 == 0) {
unsigned char *optchar = optval;
switch (optname) {
case RFID_OPT_LAYER2_UID:
if (ph->uid_len < *optlen)
*optlen = ph->uid_len;
memcpy(optchar, ph->uid, *optlen);
break;
default:
return -EINVAL;
break;
}
} else {
if (!ph->l2->fn.getopt)
return -EINVAL;
return ph->l2->fn.getopt(ph, optname, optval, optlen);
}
return 0;
}
int
rfid_layer2_setopt(struct rfid_layer2_handle *ph, int optname,
const void *optval, unsigned int optlen)
{
if (optname >> 16 == 0) {
switch (optname) {
default:
return -EINVAL;
break;
}
} else {
if (!ph->l2->fn.setopt)
return -EINVAL;
return ph->l2->fn.setopt(ph, optname, optval, optlen);
}
return 0;
}
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