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Load NDEF message from file if a valid filename is provided.

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This commit is contained in:
Romain Tartiere 2011-03-11 19:01:28 +00:00
parent 35e9696ada
commit 7b95a8a487
1 changed files with 75 additions and 22 deletions
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97
examples/nfc-emulate-forum-tag4.c
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@ -37,23 +37,14 @@
// its internal handling of ISO14443-4 specificities.
// - Thanks to this internal handling & injection of WTX frames,
// this example works on readers very strict on timing
// - This example expects a hardcoded list of commands and
// more precisely the commands sent by a Nokia NFC when
// discovering a NFC-Forum tag type4:
// * Anticoll & RATS
// * App Select by name "e103e103e103"
// * App Select by name "e103e103e103"
// * App Select by name "D2760000850100"
// * Select CC
// * ReadBinary CC
// * Select NDEF
// * Read first 2 NDEF bytes
// * Read remaining of NDEF file
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif // HAVE_CONFIG_H
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <signal.h>
#include <stdio.h>
@ -318,22 +309,57 @@ bool receive_bytes (void)
return true;
}
int
main (void)
size_t
ndef_message_load (char *filename, struct nfcforum_tag4 *tag_data)
{
// Try to open the NFC reader
pnd = nfc_connect (NULL);
struct stat sb;
if (stat (filename, &sb) < 0)
return 0;
if (pnd == NULL) {
ERR("Unable to connect to NFC device");
exit (EXIT_FAILURE);
/* Check file size */
if (sb.st_size > 0xFFFF) {
errx (EXIT_FAILURE, "file size too large '%s'", filename);
}
signal (SIGINT, stop_emulation);
if (!(tag_data->ndef_file = malloc (sb.st_size + 2)))
err (EXIT_FAILURE, "malloc");
printf ("Connected to NFC device: %s\n", pnd->acName);
printf ("Emulating NDEF tag now, please touch it with a second NFC device\n");
tag_data->ndef_file_len = sb.st_size + 2;
tag_data->ndef_file[0] = (uint8_t)(sb.st_size >> 8);
tag_data->ndef_file[1] = (uint8_t)(sb.st_size);
FILE *F;
if (!(F = fopen (filename, "r")))
err (EXIT_FAILURE, "fopen (%s, \"r\")", filename);
if (1 != fread (tag_data->ndef_file + 2, sb.st_size, 1, F))
err (EXIT_FAILURE, "Can't read from %s", filename);
fclose (F);
return sb.st_size;
}
size_t
ndef_message_save (char *filename, struct nfcforum_tag4 *tag_data)
{
FILE *F;
if (!(F= fopen (filename, "w")))
return 0;
if (1 != fwrite (tag_data->ndef_file + 2, tag_data->ndef_file_len - 2, 1, F)) {
fclose (F);
return 0;
}
fclose (F);
return tag_data->ndef_file_len - 2;
}
int
main (int argc, char *argv[])
{
nfc_target_t nt = {
.nm = {
.nmt = NMT_ISO14443A,
@ -371,8 +397,35 @@ main (void)
.data = &nfcforum_tag4_data,
};
// If some file is provided load it
if (argc == 2) {
if (!ndef_message_load (argv[1], &nfcforum_tag4_data)) {
err (EXIT_FAILURE, "Can't load NDEF file '%s'", argv[1]);
}
}
// Try to open the NFC reader
pnd = nfc_connect (NULL);
if (pnd == NULL) {
ERR("Unable to connect to NFC device");
exit (EXIT_FAILURE);
}
signal (SIGINT, stop_emulation);
printf ("Connected to NFC device: %s\n", pnd->acName);
printf ("Emulating NDEF tag now, please touch it with a second NFC device\n");
nfc_emulate_target (pnd, &emulator);
nfc_disconnect(pnd);
if (argc == 2) {
if (!(ndef_message_save (argv[1], &nfcforum_tag4_data))) {
err (EXIT_FAILURE, "Can't load NDEF file '%s'", argv[1]);
}
}
exit (EXIT_SUCCESS);
}