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
|
/*
* Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
import java.io.UnsupportedEncodingException;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import java.util.logging.ConsoleHandler;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Utility methods for parsing raw JDP packets.
*
* @author Alex Schenkman
*/
public class JdpTestUtil {
static final int HEADER_SIZE = 4 + 2; // magic + protocol version
/**
* Reads two bytes, starting at the given position,
* and converts them into an int.
*
* @param data
* @param pos
* @return
*/
static int decode2ByteInt(byte[] data, int pos) {
return (((data[pos] & 0xFF) << 8) | (data[pos + 1] & 0xFF));
}
/**
* Reads four bytes, starting at the given position,
* and converts them into an int.
*
* @param data
* @param pos
* @return
*/
static int decode4ByteInt(byte[] data, int pos) {
int result = data[pos + 3] & 0xFF;
result = result | ((data[pos + 2] & 0xFF) << 8);
result = result | ((data[pos + 1] & 0xFF) << 16);
result = result | ((data[pos] & 0xFF) << 24);
return result;
}
/**
* Reads an entry from the given byte array, starting at the given position.
* This is an internal function used by @see readRawPayload(byte[] rawPayload, int size).
* <p/>
* The format of an entry is:
* 2 bytes with the size of the following string.
* n bytes of characters.
*
* @param data
* @param pos
* @return
* @throws UnsupportedEncodingException
*/
static String decodeEntry(byte[] data, int pos)
throws UnsupportedEncodingException {
int size = JdpTestUtil.decode2ByteInt(data, pos);
pos = pos + 2;
byte[] raw = Arrays.copyOfRange(data, pos, pos + size);
return new String(raw, "UTF-8");
}
/**
* Builds a Map with the payload, from the raw data.
*
* @param rawData
* @return
* @throws UnsupportedEncodingException
*/
static Map<String, String> readPayload(byte[] rawData)
throws UnsupportedEncodingException {
int totalSize = rawData.length;
int payloadSize = totalSize - HEADER_SIZE;
byte[] rawPayload = Arrays.copyOfRange(rawData, HEADER_SIZE, HEADER_SIZE + payloadSize);
Map<String, String> payload = readRawPayload(rawPayload, payloadSize);
return payload;
}
/**
* Builds a map from the payload's raw data.
* This is an internal function used by @see readPayload(byte[] rawData)
*
* @param rawPayload
* @param size
* @return
* @throws UnsupportedEncodingException
*/
static Map<String, String> readRawPayload(byte[] rawPayload, int size)
throws UnsupportedEncodingException {
String key, value;
Map<String, String> payload = new HashMap<String, String>();
for (int pos = 0; pos < size; ) {
key = decodeEntry(rawPayload, pos);
pos = pos + 2 + key.length();
value = decodeEntry(rawPayload, pos);
pos = pos + 2 + value.length();
payload.put(key, value);
}
return payload;
}
static void enableConsoleLogging(Logger log, Level level) throws SecurityException {
ConsoleHandler handler = new ConsoleHandler();
handler.setLevel(level);
log.addHandler(handler);
log.setLevel(level);
}
}
|
