1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
|
/*
* Copyright (C) 2021 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.nfc;
import android.os.SystemProperties;
import java.util.Locale;
import android.util.Log;
import java.io.PrintWriter;
/**
* Parse the Routing Table from the last backup lmrt cmd and dump it with a clear typography
*/
public class RoutingTableParser {
static final boolean DBG = SystemProperties.getBoolean("persist.nfc.debug_enabled", false);
private static final String TAG = "RoutingTableParser";
private String getTechStr(int value) {
String[] tech_mask_list = {
"TECHNOLOGY_A", "TECHNOLOGY_B", "TECHNOLOGY_F", "TECHNOLOGY_V"
};
if (value > tech_mask_list.length) {
return "UNSUPPORTED_TECH";
}
return tech_mask_list[value];
}
private String getProtoStr(int value) {
String[] proto_mask_list = {
"PROTOCOL_UNDETERMINED", "PROTOCOL_T1T", "PROTOCOL_T2T", "PROTOCOL_T3T",
"PROTOCOL_ISO_DEP", "PROTOCOL_NFC_DEP", "PROTOCOL_T5T", "PROTOCOL_NDEF"
};
if (value > proto_mask_list.length) {
return "UNSUPPORTED_PROTO";
}
return proto_mask_list[value];
}
private String getAidStr(byte[] rt, int offset, int aidLen) {
String Aid = "";
for (int i = 0; i < aidLen; i++) {
Aid += String.format("%02X", rt[offset + i]);
}
if (Aid.length() == 0) {
return "Empty_AID";
}
return "AID_" + Aid;
}
private String getSystemCodeStr(byte[] rt, int offset, int scLen) {
String SystemCode = "";
for (int i = 0; i < scLen; i++) {
SystemCode += String.format("%02X", rt[offset + i]);
}
return "SYSTEMCODE_" + SystemCode;
}
private String getBlockCtrlStr(int mask) {
if ((mask & 0x40) != 0) {
return "True";
}
return "False";
}
private String getPrefixSubsetStr(int mask) {
String prefix_subset_str = "";
if ((mask & 0x10) != 0) {
prefix_subset_str += "Prefix ";
}
if ((mask & 0x20) != 0) {
prefix_subset_str += "Subset";
}
if (prefix_subset_str.equals("")){
return "Exact";
}
return prefix_subset_str;
}
private String formatRow(String entry, String eeId,
String pwrState, String blkCtrl, String extra) {
String fmt = "\t%-36s\t%8s\t%-11s\t%-10s\t%-10s";
return String.format(fmt, entry, eeId, pwrState, blkCtrl, extra);
}
private void dumpTechEntry(byte[] rt, int rtSize, PrintWriter pw, int offset) {
if (offset + 4 >= rtSize) return;
String blkCtrl = getBlockCtrlStr(rt[offset] & 0xF0);
String eeId = String.format("0x%02X", rt[offset + 2]);
String pwrState = String.format("0x%02X", rt[offset + 3]);
String entry = getTechStr(rt[offset + 4]);
pw.println(formatRow(entry, eeId, pwrState, blkCtrl, ""));
}
private void dumpProtoEntry(byte[] rt, int rtSize, PrintWriter pw, int offset) {
if (offset + 4 >= rtSize) return;
String blkCtrl = getBlockCtrlStr(rt[offset] & 0xF0);
String eeId = String.format("0x%02X", rt[offset + 2]);
String pwrState = String.format("0x%02X", rt[offset + 3]);
String entry = getProtoStr(rt[offset + 4]);
pw.println(formatRow(entry, eeId, pwrState, blkCtrl, ""));
}
private void dumpAidEntry(byte[] rt, int rtSize, PrintWriter pw, int offset) {
if (offset + 4 + rt[offset + 1] - 2 >= rtSize) return;
String blkCtrl = getBlockCtrlStr(rt[offset] & 0xF0);
String extra = getPrefixSubsetStr(rt[offset] & 0xF0);
String eeId = String.format("0x%02X", rt[offset + 2]);
String pwrState = String.format("0x%02X", rt[offset + 3]);
String entry = getAidStr(rt, offset + 4, rt[offset + 1] - 2);
pw.println(formatRow(entry, eeId, pwrState, blkCtrl, extra));
}
private void dumpSystemEntry(byte[] rt, int rtSize, PrintWriter pw, int offset) {
if (offset + 4 + rt[offset + 1] - 2 >= rtSize) return;
String blkCtrl = getBlockCtrlStr(rt[offset] & 0xF0);
String eeId = String.format("0x%02X", rt[offset + 2]);
String pwrState = String.format("0x%02X", rt[offset + 3]);
String entry = getSystemCodeStr(rt, offset + 4, rt[offset + 1] - 2);
pw.println(formatRow(entry, eeId, pwrState, blkCtrl, ""));
}
/**
* Get Routing Table from the last backup lmrt cmd and dump it
*/
public void dump(DeviceHost dh, PrintWriter pw) {
int offset = 0;
byte[] rt = dh.getRoutingTable();
int maxSize = dh.getMaxRoutingTableSize();
logRoutingTableRawData(rt);
pw.println("--- dumpRoutingTable: start ---");
pw.println(String.format(Locale.US, "RoutingTableSize: %d/%d", rt.length, maxSize));
pw.println(formatRow("Entry", "NFCEE_ID", "Power State", "Block Ctrl", "Extra Info"));
while (offset < rt.length) {
int type = rt[offset] & 0x0F;
if (type == 0x00) {
// Technology-based routing entry
dumpTechEntry(rt, rt.length, pw, offset);
} else if (type == 0x01) {
// Protocol-based routing entry
dumpProtoEntry(rt, rt.length, pw, offset);
} else if (type == 0x02) {
// AID-based routing entry
dumpAidEntry(rt, rt.length, pw, offset);
} else if (type == 0x03) {
// System Code-based routing entry
dumpSystemEntry(rt, rt.length, pw, offset);
} else {
// Unrecognizable entry type
Log.d(TAG, String.format("Unrecognizable entry type: 0x%02X, stop parsing", type));
break;
}
offset += rt[offset+1] + 2;
}
pw.println("--- dumpRoutingTable: end ---");
}
private void logRoutingTableRawData(byte[] lmrt_cmd) {
if (!DBG) return;
String lmrt_str = "";
for (int i = 0; i < lmrt_cmd.length; i++) {
lmrt_str += String.format("%02X ", lmrt_cmd[i]);
}
Log.d(TAG, String.format("RoutingTableSize: %d", lmrt_cmd.length));
Log.d(TAG, String.format("RoutingTable: %s", lmrt_str));
}
}
|
