116 lines
2.6 KiB
C
116 lines
2.6 KiB
C
/* RFID scanning implementation
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*
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* (C) 2006 by Harald Welte <laforge@gnumonks.org>
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*
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*/
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <librfid/rfid.h>
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#include <librfid/rfid_layer2.h>
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#include <librfid/rfid_reader.h>
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#include <librfid/rfid_protocol.h>
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static struct rfid_layer2_handle *
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rfid_layer2_scan1(struct rfid_reader_handle *rh, int l2)
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{
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struct rfid_layer2_handle *l2h;
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if (rh->reader->l2_supported & (1 << l2)) {
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l2h = rfid_layer2_init(rh, l2);
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if (!l2h)
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return NULL;
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if (rfid_layer2_open(l2h) < 0) {
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rfid_layer2_fini(l2h);
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return NULL;
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} else
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return l2h;
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}
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return NULL;
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}
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struct rfid_layer2_handle *
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rfid_layer2_scan(struct rfid_reader_handle *rh)
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{
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struct rfid_layer2_handle *l2h;
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int i;
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#define RFID_LAYER2_MAX 16
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for (i = 0; i < RFID_LAYER2_MAX; i++) {
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DEBUGP("testing l2 %u\n", i);
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l2h = rfid_layer2_scan1(rh, i);
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if (l2h)
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return l2h;
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}
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return NULL;
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}
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static struct rfid_protocol_handle *
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rfid_protocol_scan1(struct rfid_layer2_handle *l2h, int proto)
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{
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struct rfid_protocol_handle *ph;
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if (l2h->rh->reader->proto_supported & (1 << proto) &&
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l2h->proto_supported & (1 << proto)) {
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ph = rfid_protocol_init(l2h, proto);
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if (!ph)
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return NULL;
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if (rfid_protocol_open(ph) < 0) {
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rfid_protocol_fini(ph);
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return NULL;
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} else
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return ph;
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}
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return NULL;
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}
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struct rfid_protocol_handle *
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rfid_protocol_scan(struct rfid_layer2_handle *l2h)
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{
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struct rfid_protocol_handle *ph;
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int i;
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#define RFID_PROTOCOL_MAX 16
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for (i = 0; i < RFID_PROTOCOL_MAX; i++) {
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DEBUGP("testing proto %u\n", i);
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ph = rfid_protocol_scan1(l2h, i);
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if (ph)
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return ph;
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}
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return NULL;
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}
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/* Scan for any RFID transponder within range of the given reader.
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* Abort after the first successfully found transponder. */
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int rfid_scan(struct rfid_reader_handle *rh,
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struct rfid_layer2_handle **l2h,
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struct rfid_protocol_handle **ph)
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{
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*l2h = rfid_layer2_scan(rh);
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if (!*l2h)
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return 0;
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*ph = rfid_protocol_scan(*l2h);
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if (!*ph)
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return 2;
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return 3;
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}
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