c72846e3c6
This becomes more consistent with all other pass by pointer of most structures. Additionally, this should lessen stack memory usage, as building strings with str_nfc_target would push the target (283 bytes) plus then a copy of the info objects (up to 275) onto the stack as it dives into the sprintf functions. Lastly, this makes my attempt at a .NET wrapper easier, as I can make passing by pointer work, but passing by value seems to bomb on the interop right now.
147 lines
4.1 KiB
C
147 lines
4.1 KiB
C
/*-
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* Public platform independent Near Field Communication (NFC) library examples
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*
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* Copyright (C) 2011 Romain Tartiere
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* Copyright (C) 2010, 2011 Romuald Conty
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* 1) Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2 )Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* Note that this license only applies on the examples, NFC library itself is under LGPL
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*
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*/
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/**
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* @file nfc-poll.c
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* @brief Polling example
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif // HAVE_CONFIG_H
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#include <err.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <string.h>
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#include <nfc/nfc.h>
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#include <nfc/nfc-types.h>
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#include "utils/nfc-utils.h"
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#define MAX_DEVICE_COUNT 16
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static nfc_device *pnd = NULL;
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static nfc_context *context;
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static void stop_polling(int sig)
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{
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(void) sig;
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if (pnd != NULL)
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nfc_abort_command(pnd);
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else {
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nfc_exit(context);
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exit(EXIT_FAILURE);
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}
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}
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static void
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print_usage(const char *progname)
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{
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printf("usage: %s [-v]\n", progname);
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printf(" -v\t verbose display\n");
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}
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int
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main(int argc, const char *argv[])
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{
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bool verbose = false;
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signal(SIGINT, stop_polling);
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// Display libnfc version
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const char *acLibnfcVersion = nfc_version();
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printf("%s uses libnfc %s\n", argv[0], acLibnfcVersion);
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if (argc != 1) {
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if ((argc == 2) && (0 == strcmp("-v", argv[1]))) {
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verbose = true;
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} else {
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print_usage(argv[0]);
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exit(EXIT_FAILURE);
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}
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}
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const uint8_t uiPollNr = 20;
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const uint8_t uiPeriod = 2;
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const nfc_modulation nmModulations[5] = {
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{ .nmt = NMT_ISO14443A, .nbr = NBR_106 },
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{ .nmt = NMT_ISO14443B, .nbr = NBR_106 },
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{ .nmt = NMT_FELICA, .nbr = NBR_212 },
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{ .nmt = NMT_FELICA, .nbr = NBR_424 },
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{ .nmt = NMT_JEWEL, .nbr = NBR_106 },
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};
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const size_t szModulations = 5;
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nfc_target nt;
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int res = 0;
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nfc_init(&context);
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if (context == NULL) {
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ERR("Unable to init libnfc (malloc)");
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exit(EXIT_FAILURE);
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}
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pnd = nfc_open(context, NULL);
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if (pnd == NULL) {
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ERR("%s", "Unable to open NFC device.");
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nfc_exit(context);
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exit(EXIT_FAILURE);
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}
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if (nfc_initiator_init(pnd) < 0) {
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nfc_perror(pnd, "nfc_initiator_init");
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nfc_close(pnd);
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nfc_exit(context);
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exit(EXIT_FAILURE);
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}
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printf("NFC reader: %s opened\n", nfc_device_get_name(pnd));
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printf("NFC device will poll during %ld ms (%u pollings of %lu ms for %zd modulations)\n", (unsigned long) uiPollNr * szModulations * uiPeriod * 150, uiPollNr, (unsigned long) uiPeriod * 150, szModulations);
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if ((res = nfc_initiator_poll_target(pnd, nmModulations, szModulations, uiPollNr, uiPeriod, &nt)) < 0) {
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nfc_perror(pnd, "nfc_initiator_poll_target");
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nfc_close(pnd);
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nfc_exit(context);
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exit(EXIT_FAILURE);
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}
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if (res > 0) {
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print_nfc_target(&nt, verbose);
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} else {
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printf("No target found.\n");
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}
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nfc_close(pnd);
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nfc_exit(context);
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exit(EXIT_SUCCESS);
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}
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