bece73faaf
* in main(): ** errx()/err()/return -> exit() ** return values -> EXIT_SUCCESS & EXIT_FAILURE * out of main: ** err()/errx()/exit() -> return ** change retval from size_t to int to allow returning errors ** don't use EXIT_SUCCESS / EXIT_FAILURE as retvals * add nfc_close() & nfc_exit() to exit() on errors * add missing fclose() on errors * add missing test if (pnd == NULL) * unify style if (pnd == / != NULL) * remove goto's * few related fixes * remove if(pnd!=NULL) test on nfc_close() calls
124 lines
3.5 KiB
C
124 lines
3.5 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) 2009 Roel Verdult
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* Copyright (C) 2010 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-dep-initiator.c
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* @brief Turns the NFC device into a D.E.P. initiator (see NFCIP-1)
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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 <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <signal.h>
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#include <nfc/nfc.h>
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#include "utils/nfc-utils.h"
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#define MAX_FRAME_LEN 264
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static nfc_device *pnd;
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static void stop_dep_communication(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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exit(EXIT_FAILURE);
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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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nfc_target nt;
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uint8_t abtRx[MAX_FRAME_LEN];
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uint8_t abtTx[] = "Hello World!";
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if (argc > 1) {
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printf("Usage: %s\n", argv[0]);
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exit(EXIT_FAILURE);
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}
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nfc_context *context;
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nfc_init(&context);
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pnd = nfc_open(context, NULL);
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if (pnd == NULL) {
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printf("Unable to open NFC device.\n");
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nfc_exit(context);
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exit(EXIT_FAILURE);
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}
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printf("NFC device: %s\n opened", nfc_device_get_name(pnd));
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signal(SIGINT, stop_dep_communication);
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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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if (nfc_initiator_select_dep_target(pnd, NDM_PASSIVE, NBR_212, NULL, &nt, 1000) < 0) {
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nfc_perror(pnd, "nfc_initiator_select_dep_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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print_nfc_target(nt, false);
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printf("Sending: %s\n", abtTx);
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int res;
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if ((res = nfc_initiator_transceive_bytes(pnd, abtTx, sizeof(abtTx), abtRx, sizeof(abtRx), 0)) < 0) {
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nfc_perror(pnd, "nfc_initiator_transceive_bytes");
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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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abtRx[res] = 0;
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printf("Received: %s\n", abtRx);
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if (nfc_initiator_deselect_target(pnd) < 0) {
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nfc_perror(pnd, "nfc_initiator_deselect_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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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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