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/* RFID scanning implementation
*
* (C) 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 <librfid/rfid.h>
#include <librfid/rfid_layer2.h>
#include <librfid/rfid_reader.h>
#include <librfid/rfid_protocol.h>
static struct rfid_layer2_handle *
rfid_layer2_scan1(struct rfid_reader_handle *rh, int l2)
{
struct rfid_layer2_handle *l2h;
if (rh->reader->l2_supported & (1 << l2)) {
l2h = rfid_layer2_init(rh, l2);
if (!l2h)
return NULL;
if (rfid_layer2_open(l2h) < 0) {
rfid_layer2_fini(l2h);
return NULL;
} else
return l2h;
}
return NULL;
}
static struct rfid_layer2_handle *
rfid_layer2_scan(struct rfid_reader_handle *rh)
{
struct rfid_layer2_handle *l2h;
int i;
#define RFID_LAYER2_MAX 16
for (i = 0; i < RFID_LAYER2_MAX; i++) {
DEBUGP("testing l2 %u\n", i);
l2h = rfid_layer2_scan1(rh, i);
if (l2h)
return l2h;
}
return NULL;
}
static struct rfid_protocol_handle *
rfid_protocol_scan1(struct rfid_layer2_handle *l2h, int proto)
{
struct rfid_protocol_handle *ph;
if (l2h->rh->reader->proto_supported & (1 << proto) &&
l2h->proto_supported & (1 << proto)) {
ph = rfid_protocol_init(l2h, proto);
if (!ph)
return NULL;
if (rfid_protocol_open(ph) < 0) {
rfid_protocol_fini(ph);
return NULL;
} else
return ph;
}
return NULL;
}
static struct rfid_protocol_handle *
rfid_protocol_scan(struct rfid_layer2_handle *l2h)
{
struct rfid_protocol_handle *ph;
int i;
#define RFID_PROTOCOL_MAX 16
for (i = 0; i < RFID_PROTOCOL_MAX; i++) {
DEBUGP("testing proto %u\n", i);
ph = rfid_protocol_scan1(l2h, i);
if (ph)
return ph;
}
return NULL;
}
/* Scan for any RFID transponder within range of the given reader.
* Abort after the first successfully found transponder. */
int rfid_scan(struct rfid_reader_handle *rh,
struct rfid_layer2_handle **l2h,
struct rfid_protocol_handle **ph)
{
*l2h = rfid_layer2_scan(rh);
if (!*l2h)
return 0;
*ph = rfid_protocol_scan(*l2h);
if (!*ph)
return 2;
return 3;
}
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