libnfc/examples/nfc-dep-target.c

130 lines
4.1 KiB
C

/*-
* Public platform independent Near Field Communication (NFC) library examples
*
* Copyright (C) 2009, Roel Verdult
* Copyright (C) 2010, Romuald Conty
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1) Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2 )Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* Note that this license only applies on the examples, NFC library itself is under LGPL
*
*/
/**
* @file nfc-dep-target.c
* @brief Turns the NFC device into a D.E.P. target (see NFCIP-1)
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif // HAVE_CONFIG_H
#include <stdio.h>
#include <stdlib.h>
#include <nfc/nfc.h>
#include "nfc-utils.h"
#define MAX_FRAME_LEN 264
int
main (int argc, const char *argv[])
{
byte_t abtRx[MAX_FRAME_LEN];
size_t szRx = sizeof(abtRx);
size_t szDeviceFound;
byte_t abtTx[] = "Hello Mars!";
nfc_device_t *pnd;
#define MAX_DEVICE_COUNT 2
nfc_device_desc_t pnddDevices[MAX_DEVICE_COUNT];
nfc_list_devices (pnddDevices, MAX_DEVICE_COUNT, &szDeviceFound);
// Little hack to allow using nfc-dep-initiator & nfc-dep-target from
// the same machine: if there is more than one readers connected
// nfc-dep-target will connect to the second reader
// (we hope they're always detected in the same order)
if (szDeviceFound == 1) {
pnd = nfc_connect (&(pnddDevices[0]));
} else if (szDeviceFound > 1) {
pnd = nfc_connect (&(pnddDevices[1]));
} else {
printf("No device found.");
return EXIT_FAILURE;
}
if (argc > 1) {
printf ("Usage: %s\n", argv[0]);
return EXIT_FAILURE;
}
nfc_target_t nt = {
.nm = {
.nmt = NMT_DEP,
.nbr = NBR_UNDEFINED
},
.nti = {
.ndi = {
.abtNFCID3 = { 0x12, 0x34, 0x56, 0x78, 0x9a, 0xbc, 0xde, 0xff, 0x00, 0x00 },
.szGB = 4,
.abtGB = { 0x12, 0x34, 0x56, 0x78 },
/* These bytes are not used by nfc_target_init: the chip will provide them automatically to the initiator */
.btDID = 0x00,
.btBS = 0x00,
.btBR = 0x00,
.btTO = 0x00,
.btPP = 0x01,
},
},
};
if (!pnd) {
printf("Unable to connect to NFC device.\n");
return EXIT_FAILURE;
}
printf ("Connected to NFC device: %s\n", pnd->acName);
printf ("NFC device will now act as: ");
print_nfc_target (nt, false);
printf ("Waiting for initiator request...\n");
if(!nfc_target_init (pnd, &nt, abtRx, &szRx)) {
nfc_perror(pnd, "nfc_target_init");
return EXIT_FAILURE;
}
printf("Initiator request received. Waiting for data...\n");
if (!nfc_target_receive_bytes (pnd, abtRx, &szRx)) {
nfc_perror(pnd, "nfc_target_receive_bytes");
return EXIT_FAILURE;
}
abtRx[szRx] = '\0';
printf ("Received: %s\n", abtRx);
printf ("Sending: %s\n", abtTx);
if (!nfc_target_send_bytes (pnd, abtTx, sizeof(abtTx))) {
nfc_perror(pnd, "nfc_target_send_bytes");
return EXIT_FAILURE;
}
printf("Data sent.\n");
nfc_disconnect (pnd);
return EXIT_SUCCESS;
}