Added draft of a new libnfc-based example: nfc-sam.

It tests the comunication with a connected SAM (Secure Access Module).
2026-03-03 06:11:46 +00:00 · 2010-06-15 15:05:40 +00:00
parent ec48f04dd8
commit 8e4bef9c90
4 changed files with 161 additions and 3 deletions
--- a/examples/nfc-sam.c
+++ b/examples/nfc-sam.c
@@ -0,0 +1,130 @@
+/*-
+ * Public platform independent Near Field Communication (NFC) library
+ * 
+ * Copyright (C) 2009, Roel Verdult
+ * 
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or (at your
+ * option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+/**
+ * @file nfc-sam.c
+ * @brief Configure the reader to comunicate with a SAM (Secure Access Module).
+ */
+ 
+#ifdef HAVE_CONFIG_H
+  #include "config.h"
+#endif // HAVE_CONFIG_H
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <nfc/nfc.h>
+#include <nfc/nfc-messages.h>
+#include "nfc-utils.h"
+
+#define MAX_FRAME_LEN 264
+
+#define VIRTUAL_CARD_MODE 2
+#define WIRED_CARD_MODE 3
+#define DUAL_CARD_MODE 4
+
+int main(int argc, const char* argv[])
+{
+  nfc_device_t* pnd;
+  
+  byte_t abtRx[MAX_FRAME_LEN];
+  size_t szRxLen;
+  
+  byte_t abtSAMConfig[] = { 0xD4,0x14,0x00,0x00 };
+  
+  nfc_target_info_t nti;
+
+  // Display libnfc version
+  const char* acLibnfcVersion = nfc_version();
+  printf("%s use libnfc %s\n", argv[0], acLibnfcVersion);
+
+  // Connect using the first available NFC device
+  pnd = nfc_connect(NULL);
+
+  if (pnd == NULL) {
+      printf("Unable to connect to NFC device.");
+      return EXIT_FAILURE;
+  }
+
+  // Set connected NFC device to initiator mode
+  nfc_initiator_init(pnd);
+
+  // Drop the field for a while
+  nfc_configure(pnd,NDO_ACTIVATE_FIELD,false);
+
+  // Configure the CRC and Parity settings
+  nfc_configure(pnd,NDO_HANDLE_CRC,false);
+  nfc_configure(pnd,NDO_HANDLE_PARITY,true);
+
+  // Enable field so more power consuming cards can power themselves up
+  nfc_configure(pnd,NDO_ACTIVATE_FIELD,true);
+
+  printf("Connected to NFC reader: %s\n",pnd->acName);
+  
+  // Print the example's menu.
+  printf("\nSelect the comunication mode:\n");
+  printf("[1] Virtual card mode.\n");
+  printf("[2] Wired card mode.\n");
+  printf("[3] Dual card mode.\n");
+  printf(">> ");
+  
+  // Take user's choice.
+  char input = getchar();
+  int mode = input-'0'+1;
+  printf("\n");
+  if (mode <= 1 || mode >= 5)
+    return 1;
+    
+  abtSAMConfig[2] = mode;
+  
+  // Connect with the SAM.
+  pnd->pdc->transceive(pnd->nds,abtSAMConfig,sizeof(abtSAMConfig),abtRx,&szRxLen);
+  
+  switch (mode)
+  {
+    case VIRTUAL_CARD_MODE:
+    {
+      printf("Now the SAM is readable from an external reader.\n");
+      // TODO.
+    }
+    break;
+        
+    case WIRED_CARD_MODE:
+    {        
+      // Read the SAM's ATS (ATR).
+      if (nfc_initiator_select_tag(pnd,NM_ISO14443A_106,NULL,0,&nti))
+      {
+        printf("The following (NFC) ISO14443A tag was found:\n\n");
+        print_nfc_iso14443a_info (nti.nai);
+      }
+    }
+    break;
+    
+    case DUAL_CARD_MODE:
+    {
+      // TODO.
+    }
+    break;
+  }
+
+  // Disconnect from NFC device
+  nfc_disconnect(pnd);
+  
+  return EXIT_SUCCESS;
+}