From f2cb0eaa6e14377ce6791e5b47f29d119075cb68 Mon Sep 17 00:00:00 2001
From: Philippe Teuwen <yobibe@gmail.com>
Date: Tue, 3 May 2011 19:22:28 +0000
Subject: [PATCH] list_passive_targets: fixed for TypeB on LoGO

---
 libnfc/nfc.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/libnfc/nfc.c b/libnfc/nfc.c
index b55e241..1e95e09 100644
--- a/libnfc/nfc.c
+++ b/libnfc/nfc.c
@@ -390,6 +390,12 @@ nfc_initiator_list_passive_targets (nfc_device_t * pnd,
   while (nfc_initiator_select_passive_target (pnd, nm, pbtInitData, szInitDataLen, &nt)) {
     nfc_initiator_deselect_target (pnd);
 
+    // some readers have to reset the RF field (e.g. LoGO) so we stop if we see more than once the same tag
+    if (nm.nmt == NMT_ISO14443B && szTargetFound >= 1) {
+      if (0 == memcmp(nt.nti.nbi.abtPupi, ant[0].nti.nbi.abtPupi, sizeof (nt.nti.nbi.abtPupi))) {
+        break;
+      }
+    }
     if (szTargets > szTargetFound) {
       memcpy (&(ant[szTargetFound]), &nt, sizeof (nfc_target_t));
     } else {
@@ -398,7 +404,7 @@ nfc_initiator_list_passive_targets (nfc_device_t * pnd,
     szTargetFound++;
     // deselect has no effect on FeliCa and Jewel cards so we'll stop after one...
     if ((nm.nmt == NMT_FELICA) || (nm.nmt == NMT_JEWEL)) {
-        break;
+      break;
     }
   }
   *pszTargetFound = szTargetFound;