git.rot13.org Git - librfid/blob - src/rfid_protocol.c

   1 /* librfid - layer 3 protocol handler
   2  * (C) 2005-2006 by Harald Welte <laforge@gnumonks.org>
   3  */
   4
   5 /*
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License version 2
   8  *  as published by the Free Software Foundation
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  */
  19
  20 #include <stdlib.h>
  21 #include <unistd.h>
  22 #include <errno.h>
  23
  24 #include <librfid/rfid_layer2.h>
  25 #include <librfid/rfid_protocol.h>
  26
  27 static const struct rfid_protocol *rfid_protocols[] = {
  28         [RFID_PROTOCOL_MIFARE_CLASSIC]  = &rfid_protocol_mfcl,
  29         [RFID_PROTOCOL_MIFARE_UL]       = &rfid_protocol_mful,
  30         [RFID_PROTOCOL_TCL]             = &rfid_protocol_tcl,
  31 };
  32
  33 struct rfid_protocol_handle *
  34 rfid_protocol_init(struct rfid_layer2_handle *l2h, unsigned int id)
  35 {
  36         struct rfid_protocol *p;
  37         struct rfid_protocol_handle *ph = NULL;
  38
  39         if (id >= ARRAY_SIZE(rfid_protocols))
  40                 return NULL;
  41
  42         p = rfid_protocols[id];
  43
  44         ph = p->fn.init(l2h);
  45         if (!ph)
  46                 return NULL;
  47
  48         ph->proto = p;
  49         ph->l2h = l2h;
  50
  51         return ph;
  52 }
  53
  54 int
  55 rfid_protocol_open(struct rfid_protocol_handle *ph)
  56 {
  57         if (ph->proto->fn.open)
  58                 return ph->proto->fn.open(ph);
  59         return 0;
  60 }
  61
  62 int
  63 rfid_protocol_transceive(struct rfid_protocol_handle *ph,
  64                          const unsigned char *tx_buf, unsigned int len,
  65                          unsigned char *rx_buf, unsigned int *rx_len,
  66                          unsigned int timeout, unsigned int flags)
  67 {
  68         return ph->proto->fn.transceive(ph, tx_buf, len, rx_buf, rx_len,
  69                                         timeout, flags);
  70 }
  71
  72 int
  73 rfid_protocol_read(struct rfid_protocol_handle *ph,
  74                    unsigned int page,
  75                    unsigned char *rx_data,
  76                    unsigned int *rx_len)
  77 {
  78         if (ph->proto->fn.read)
  79                 return ph->proto->fn.read(ph, page, rx_data, rx_len);
  80         else
  81                 return -EINVAL;
  82 }
  83
  84 int
  85 rfid_protocol_write(struct rfid_protocol_handle *ph,
  86                    unsigned int page,
  87                    unsigned char *tx_data,
  88                    unsigned int tx_len)
  89 {
  90         if (ph->proto->fn.write)
  91                 return ph->proto->fn.write(ph, page, tx_data, tx_len);
  92         else
  93                 return -EINVAL;
  94 }
  95
  96 int rfid_protocol_fini(struct rfid_protocol_handle *ph)
  97 {
  98         return ph->proto->fn.fini(ph);
  99 }
 100
 101 int
 102 rfid_protocol_close(struct rfid_protocol_handle *ph)
 103 {
 104         if (ph->proto->fn.close)
 105                 return ph->proto->fn.close(ph);
 106         return 0;
 107 }
 108
 109 char *rfid_protocol_name(struct rfid_protocol_handle *ph)
 110 {
 111         return ph->proto->name;
 112 }