1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.nfc.cardemulation; 18 19 import android.sysprop.NfcProperties; 20 import android.util.Log; 21 import android.util.proto.ProtoOutputStream; 22 23 import com.android.nfc.NfcService; 24 import com.android.nfc.cardemulation.RegisteredT3tIdentifiersCache.T3tIdentifier; 25 26 import java.io.FileDescriptor; 27 import java.io.PrintWriter; 28 import java.util.ArrayList; 29 import java.util.List; 30 31 public class SystemCodeRoutingManager { 32 static final String TAG = "SystemCodeRoutingManager"; 33 34 static final boolean DBG = NfcProperties.debug_enabled().orElse(true); 35 36 final Object mLock = new Object(); 37 38 List<T3tIdentifier> mConfiguredT3tIdentifiers = 39 new ArrayList<T3tIdentifier>(); 40 configureRouting(List<T3tIdentifier> t3tIdentifiers)41 public boolean configureRouting(List<T3tIdentifier> t3tIdentifiers) { 42 if (DBG) Log.d(TAG, "configureRouting"); 43 List<T3tIdentifier> toBeAdded = new ArrayList<T3tIdentifier>(); 44 List<T3tIdentifier> toBeRemoved = new ArrayList<T3tIdentifier>(); 45 synchronized (mLock) { 46 for (T3tIdentifier t3tIdentifier : t3tIdentifiers) { 47 if (!mConfiguredT3tIdentifiers.contains(t3tIdentifier)) { 48 toBeAdded.add(t3tIdentifier); 49 } 50 } 51 for (T3tIdentifier t3tIdentifier : mConfiguredT3tIdentifiers) { 52 if (!t3tIdentifiers.contains(t3tIdentifier)) { 53 toBeRemoved.add(t3tIdentifier); 54 } 55 } 56 if (toBeAdded.size() <= 0 && toBeRemoved.size() <= 0) { 57 Log.d(TAG, "configureRouting: Routing table unchanged, not updating"); 58 return false; 59 } 60 // Update internal structures 61 for (T3tIdentifier t3tIdentifier : toBeRemoved) { 62 if (DBG) Log.d(TAG, "configureRouting: deregisterNfcFSystemCodeonDh:"); 63 NfcService.getInstance().deregisterT3tIdentifier( 64 t3tIdentifier.systemCode, t3tIdentifier.nfcid2, t3tIdentifier.t3tPmm); 65 } 66 for (T3tIdentifier t3tIdentifier : toBeAdded) { 67 if (DBG) Log.d(TAG, "configureRouting: registerNfcFSystemCodeonDh:"); 68 NfcService.getInstance().registerT3tIdentifier( 69 t3tIdentifier.systemCode, t3tIdentifier.nfcid2 , t3tIdentifier.t3tPmm); 70 } 71 if (DBG) { 72 Log.d(TAG, "configureRouting: (Before) mConfiguredT3tIdentifiers: size=" 73 + 74 mConfiguredT3tIdentifiers.size()); 75 for (T3tIdentifier t3tIdentifier : mConfiguredT3tIdentifiers) { 76 Log.d(TAG, " " + t3tIdentifier.systemCode + 77 "/" + t3tIdentifier.t3tPmm); 78 } 79 Log.d(TAG, "configureRouting: (After) mConfiguredT3tIdentifiers: size=" 80 + t3tIdentifiers.size()); 81 for (T3tIdentifier t3tIdentifier : t3tIdentifiers) { 82 Log.d(TAG, " " + t3tIdentifier.systemCode + 83 "/" + t3tIdentifier.nfcid2 + 84 "/" + t3tIdentifier.t3tPmm); 85 } 86 } 87 mConfiguredT3tIdentifiers = t3tIdentifiers; 88 } 89 90 // And finally commit the routing 91 NfcService.getInstance().commitRouting(false); 92 93 return true; 94 } 95 96 /** 97 * This notifies that the SystemCode routing table in the controller 98 * has been cleared (usually due to NFC being turned off). 99 */ onNfccRoutingTableCleared()100 public void onNfccRoutingTableCleared() { 101 // The routing table in the controller was cleared 102 // To stay in sync, clear our own tables. 103 synchronized (mLock) { 104 if (DBG) Log.d(TAG, "onNfccRoutingTableCleared"); 105 NfcService.getInstance().clearT3tIdentifiersCache(); 106 mConfiguredT3tIdentifiers.clear(); 107 } 108 } 109 dump(FileDescriptor fd, PrintWriter pw, String[] args)110 public void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 111 pw.println("HCE-F routing table:"); 112 synchronized (mLock) { 113 for (T3tIdentifier t3tIdentifier : mConfiguredT3tIdentifiers) { 114 pw.println(" " + t3tIdentifier.systemCode + 115 "/" + t3tIdentifier.nfcid2); 116 } 117 } 118 } 119 120 /** 121 * Dump debugging information as a SystemCodeRoutingManagerProto 122 * 123 * Note: 124 * See proto definition in frameworks/base/core/proto/android/nfc/card_emulation.proto 125 * When writing a nested message, must call {@link ProtoOutputStream#start(long)} before and 126 * {@link ProtoOutputStream#end(long)} after. 127 * Never reuse a proto field number. When removing a field, mark it as reserved. 128 */ dumpDebug(ProtoOutputStream proto)129 void dumpDebug(ProtoOutputStream proto) { 130 synchronized (mLock) { 131 for (T3tIdentifier t3tIdentifier : mConfiguredT3tIdentifiers) { 132 long token = proto.start(SystemCodeRoutingManagerProto.T3T_IDENTIFIERS); 133 proto.write(SystemCodeRoutingManagerProto.T3tIdentifier.SYSTEM_CODE, 134 t3tIdentifier.systemCode); 135 proto.write(SystemCodeRoutingManagerProto.T3tIdentifier.NFCID2, 136 t3tIdentifier.nfcid2); 137 proto.end(token); 138 } 139 } 140 } 141 } 142