nfc-list: New option to choose which technologies to poll for

This is useful especially against chips emulating several types
at once (e.g. PN53x, PN544 etc)

ChangeLog

@@ -1,3 +1,11 @@
+TBD - 1.7.0.99~rc1
+------------------
+
+Fixes:
+
+Improvements:
+ - nfc-list: New option to choose which technologies to poll for
+
 Sep 03, 2013 - 1.7.0
 --------------------
 

utils/nfc-list.1

@@ -24,6 +24,21 @@ Tells
 nfc-list
 to be verbose and display detailed information about the targets shown.
 This includes SAK decoding and fingerprinting is available.
+.TP
+\fB-t\fP \fIX\fP
+Polls only for types according to bitfield value of \fIX\fP:
+   1: ISO14443A
+   2: Felica (212 kbps)
+   4: Felica (424 kbps)
+   8: ISO14443B
+  16: ISO14443B'
+  32: ISO14443B-2 ST SRx
+  64: ISO14443B-2 ASK CTx
+ 128: Jewel
+
+So 255 (default) polls for all types.
+
+Note that if 16, 32 or 64 then 8 is selected too.
 
 .SH EXAMPLE
 For an ISO/IEC 14443-A tag (i.e.Mifare DESFire):

utils/nfc-list.c

@@ -61,8 +61,19 @@ static nfc_device *pnd;
 static void
 print_usage(const char *progname)
 {
-  printf("usage: %s [-v]\n", progname);
+  printf("usage: %s [-v] [-t X]\n", progname);
   printf("  -v\t verbose display\n");
+  printf("  -t X\t poll only for types according to bitfield X:\n");
+  printf("\t   1: ISO14443A\n");
+  printf("\t   2: Felica (212 kbps)\n");
+  printf("\t   4: Felica (424 kbps)\n");
+  printf("\t   8: ISO14443B\n");
+  printf("\t  16: ISO14443B'\n");
+  printf("\t  32: ISO14443B-2 ST SRx\n");
+  printf("\t  64: ISO14443B-2 ASK CTx\n");
+  printf("\t 128: Jewel\n");
+  printf("\tSo 255 (default) polls for all types.\n");
+  printf("\tNote that if 16, 32 or 64 then 8 is selected too.\n");
 }
 
 int
@@ -73,6 +84,8 @@ main(int argc, const char *argv[])
   size_t  i;
   bool verbose = false;
   int res = 0;
+  int mask = 0xff;
+  int arg;
 
   nfc_context *context;
   nfc_init(&context);
@@ -84,10 +97,27 @@ main(int argc, const char *argv[])
   // Display libnfc version
   acLibnfcVersion = nfc_version();
   printf("%s uses libnfc %s\n", argv[0], acLibnfcVersion);
-  if (argc != 1) {
+
-    if ((argc == 2) && (0 == strcmp("-v", argv[1]))) {
+  // Get commandline options
+  for (arg = 1; arg < argc; arg++) {
+    if (0 == strcmp(argv[arg], "-h")) {
+      print_usage(argv[0]);
+      exit(EXIT_SUCCESS);
+    } else if (0 == strcmp(argv[arg], "-v")) {
       verbose = true;
+    } else if ((0 == strcmp(argv[arg], "-t")) && (arg + 1 < argc)) {
+      arg++;
+      mask = atoi(argv[arg]);
+      if ((mask < 1) || (mask > 255)) {
+        ERR("%i is invalid value for type bitfield.", mask);
+        print_usage(argv[0]);
+        exit(EXIT_FAILURE);
+      }
+      // Force TypeB for all derivatives of B
+      if (mask & 0x70)
+        mask |= 0x08;
     } else {
+      ERR("%s is not supported option.", argv[arg]);
       print_usage(argv[0]);
       exit(EXIT_FAILURE);
     }
@@ -129,6 +159,7 @@ main(int argc, const char *argv[])
 
     nfc_modulation nm;
 
+    if (mask & 0x1) {
       nm.nmt = NMT_ISO14443A;
       nm.nbr = NBR_106;
       // List ISO14443A targets
@@ -142,7 +173,9 @@ main(int argc, const char *argv[])
           printf("\n");
         }
       }
+    }
 
+    if (mask & 0x02) {
       nm.nmt = NMT_FELICA;
       nm.nbr = NBR_212;
       // List Felica tags
@@ -156,7 +189,10 @@ main(int argc, const char *argv[])
           printf("\n");
         }
       }
+    }
 
+    if (mask & 0x04) {
+      nm.nmt = NMT_FELICA;
       nm.nbr = NBR_424;
       if ((res = nfc_initiator_list_passive_targets(pnd, nm, ant, MAX_TARGET_COUNT)) >= 0) {
         int n;
@@ -168,7 +204,9 @@ main(int argc, const char *argv[])
           printf("\n");
         }
       }
+    }
 
+    if (mask & 0x08) {
       nm.nmt = NMT_ISO14443B;
       nm.nbr = NBR_106;
       // List ISO14443B targets
@@ -182,7 +220,9 @@ main(int argc, const char *argv[])
           printf("\n");
         }
       }
+    }
 
+    if (mask & 0x10) {
       nm.nmt = NMT_ISO14443BI;
       nm.nbr = NBR_106;
       // List ISO14443B' targets
@@ -196,7 +236,9 @@ main(int argc, const char *argv[])
           printf("\n");
         }
       }
+    }
 
+    if (mask & 0x20) {
       nm.nmt = NMT_ISO14443B2SR;
       nm.nbr = NBR_106;
       // List ISO14443B-2 ST SRx family targets
@@ -210,7 +252,9 @@ main(int argc, const char *argv[])
           printf("\n");
         }
       }
+    }
 
+    if (mask & 0x40) {
       nm.nmt = NMT_ISO14443B2CT;
       nm.nbr = NBR_106;
       // List ISO14443B-2 ASK CTx family targets
@@ -224,7 +268,9 @@ main(int argc, const char *argv[])
           printf("\n");
         }
       }
+    }
 
+    if (mask & 0x80) {
       nm.nmt = NMT_JEWEL;
       nm.nbr = NBR_106;
       // List Jewel targets
@@ -238,6 +284,7 @@ main(int argc, const char *argv[])
           printf("\n");
         }
       }
+    }
     nfc_close(pnd);
   }