Mercurial > 510Connectbot

annotate src/ch/ethz/ssh2/transport/TransportConnection.java @ 346:d6ab7b606a50

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
compensate for SecureRandom bug on older devices
author Carl Byington <carl@five-ten-sg.com>
date Thu, 31 Jul 2014 18:51:21 -0700
parents 071eccdff8ea
children 20d0a1356c43
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
1 /*
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
2 * Copyright (c) 2006-2011 Christian Plattner. All rights reserved.
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
3 * Please refer to the LICENSE.txt for licensing details.
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
4 */
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
5 package ch.ethz.ssh2.transport;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
6
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
7 import java.io.IOException;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
8 import java.io.InputStream;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
9 import java.io.OutputStream;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
10 import java.security.SecureRandom;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
11
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
12 import ch.ethz.ssh2.PacketFormatException;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
13 import ch.ethz.ssh2.compression.Compressor;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
14 import ch.ethz.ssh2.crypto.cipher.BlockCipher;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
15 import ch.ethz.ssh2.crypto.cipher.CipherInputStream;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
16 import ch.ethz.ssh2.crypto.cipher.CipherOutputStream;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
17 import ch.ethz.ssh2.crypto.cipher.NullCipher;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
18 import ch.ethz.ssh2.crypto.digest.MAC;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
19 import ch.ethz.ssh2.log.Logger;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
20 import ch.ethz.ssh2.packets.Packets;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
21
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
22 /**
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
23 * TransportConnection.
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
24 *
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
25 * @author Christian Plattner
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
26 * @version $Id: TransportConnection.java 144 2014-04-25 12:48:25Z dkocher@sudo.ch $
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
27 */
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
28 public class TransportConnection {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
29 private static final Logger log = Logger.getLogger(TransportConnection.class);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
30
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
31 int send_seq_number = 0;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
32
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
33 int recv_seq_number = 0;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
34
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
35 CipherInputStream cis;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
36
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
37 CipherOutputStream cos;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
38
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
39 boolean useRandomPadding;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
40
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
41 /* Depends on current MAC and CIPHER */
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
42
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
43 MAC send_mac;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
44
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
45 byte[] send_mac_buffer;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
46
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
47 int send_padd_blocksize = 8;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
48
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
49 MAC recv_mac;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
50
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
51 byte[] recv_mac_buffer;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
52
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
53 byte[] recv_mac_buffer_cmp;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
54
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
55 int recv_padd_blocksize = 8;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
56
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
57 Compressor recv_comp;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
58
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
59 Compressor send_comp;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
60
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
61 boolean can_compress;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
62
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
63 byte[] recv_comp_buffer;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
64
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
65 byte[] send_comp_buffer;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
66
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
67 /* won't change */
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
68
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
69 final byte[] send_padding_buffer = new byte[256];
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
70
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
71 final byte[] send_packet_header_buffer = new byte[5];
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
72
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
73 final byte[] recv_padding_buffer = new byte[256];
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
74
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
75 final byte[] recv_packet_header_buffer = new byte[5];
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
76
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
77 boolean recv_packet_header_present = false;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
78
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
79 ClientServerHello csh;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
80
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
81 final SecureRandom rnd;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
82
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
83 public TransportConnection(InputStream is, OutputStream os, SecureRandom rnd) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
84 this.cis = new CipherInputStream(new NullCipher(), is);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
85 this.cos = new CipherOutputStream(new NullCipher(), os);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
86 this.rnd = rnd;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
87 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
88
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
89 public void changeRecvCipher(BlockCipher bc, MAC mac) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
90 cis.changeCipher(bc);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
91 recv_mac = mac;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
92 recv_mac_buffer = (mac != null) ? new byte[mac.size()] : null;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
93 recv_mac_buffer_cmp = (mac != null) ? new byte[mac.size()] : null;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
94 recv_padd_blocksize = bc.getBlockSize();
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
95
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
96 if (recv_padd_blocksize < 8) {
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
97 recv_padd_blocksize = 8;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
98 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
99 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
100
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
101 public void changeSendCipher(BlockCipher bc, MAC mac) {
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
102 if ((bc instanceof NullCipher) == false) {
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
103 /* Only use zero byte padding for the first few packets */
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
104 useRandomPadding = true;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
105 /* Once we start encrypting, there is no way back */
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
106 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
107
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
108 cos.changeCipher(bc);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
109 send_mac = mac;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
110 send_mac_buffer = (mac != null) ? new byte[mac.size()] : null;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
111 send_padd_blocksize = bc.getBlockSize();
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
112
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
113 if (send_padd_blocksize < 8) {
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
114 send_padd_blocksize = 8;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
115 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
116 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
117
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
118 public void changeRecvCompression(Compressor comp) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
119 recv_comp = comp;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
120
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
121 if (comp != null) {
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
122 recv_comp_buffer = new byte[comp.getBufferSize()];
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
123 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
124 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
125
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
126 public void changeSendCompression(Compressor comp) {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
127 send_comp = comp;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
128
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
129 if (comp != null) {
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
130 send_comp_buffer = new byte[comp.getBufferSize()];
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
131 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
132 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
133
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
134 public void sendMessage(byte[] message) throws IOException {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
135 sendMessage(message, 0, message.length, 0);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
136 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
137
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
138 public void sendMessage(byte[] message, int off, int len) throws IOException {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
139 sendMessage(message, off, len, 0);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
140 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
141
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
142 public int getPacketOverheadEstimate() {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
143 // return an estimate for the paket overhead (for send operations)
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
144 return 5 + 4 + (send_padd_blocksize - 1) + send_mac_buffer.length;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
145 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
146
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
147 public void sendMessage(byte[] message, int off, int len, int padd) throws IOException {
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
148 if (padd < 4) {
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
149 padd = 4;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
150 }
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
151 else if (padd > 64) {
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
152 padd = 64;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
153 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
154
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
155 if (send_comp != null && can_compress) {
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
156 len = send_comp.compress(message, off, len, send_comp_buffer);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
157 message = send_comp_buffer;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
158 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
159
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
160 int packet_len = 5 + len + padd; /* Minimum allowed padding is 4 */
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
161 int slack = packet_len % send_padd_blocksize;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
162
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
163 if (slack != 0) {
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
164 packet_len += (send_padd_blocksize - slack);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
165 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
166
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
167 if (packet_len < 16) {
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
168 packet_len = 16;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
169 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
170
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
171 int padd_len = packet_len - (5 + len);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
172
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
173 if (useRandomPadding) {
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
174 for (int i = 0; i < padd_len; i = i + 4) {
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
175 /*
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
176 * don't waste calls to rnd.nextInt() (by using only 8bit of the
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
177 * output). just believe me: even though we may write here up to 3
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
178 * bytes which won't be used, there is no "buffer overflow" (i.e.,
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
179 * arrayindexoutofbounds). the padding buffer is big enough =) (256
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
180 * bytes, and that is bigger than any current cipher block size + 64).
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
181 */
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
182 int r = rnd.nextInt();
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
183 send_padding_buffer[i] = (byte) r;
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
184 send_padding_buffer[i + 1] = (byte)(r >> 8);
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
185 send_padding_buffer[i + 2] = (byte)(r >> 16);
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
186 send_padding_buffer[i + 3] = (byte)(r >> 24);
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
187 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
188 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
189 else {
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
190 /* use zero padding for unencrypted traffic */
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
191 for (int i = 0; i < padd_len; i++) {
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
192 send_padding_buffer[i] = 0;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
193 }
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
194
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
195 /* Actually this code is paranoid: we never filled any
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
196 * bytes into the padding buffer so far, therefore it should
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
197 * consist of zeros only.
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
198 */
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
199 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
200
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
201 send_packet_header_buffer[0] = (byte)((packet_len - 4) >> 24);
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
202 send_packet_header_buffer[1] = (byte)((packet_len - 4) >> 16);
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
203 send_packet_header_buffer[2] = (byte)((packet_len - 4) >> 8);
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
204 send_packet_header_buffer[3] = (byte)((packet_len - 4));
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
205 send_packet_header_buffer[4] = (byte) padd_len;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
206 cos.write(send_packet_header_buffer, 0, 5);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
207 cos.write(message, off, len);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
208 cos.write(send_padding_buffer, 0, padd_len);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
209
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
210 if (send_mac != null) {
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
211 send_mac.initMac(send_seq_number);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
212 send_mac.update(send_packet_header_buffer, 0, 5);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
213 send_mac.update(message, off, len);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
214 send_mac.update(send_padding_buffer, 0, padd_len);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
215 send_mac.getMac(send_mac_buffer, 0);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
216 cos.writePlain(send_mac_buffer, 0, send_mac_buffer.length);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
217 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
218
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
219 cos.flush();
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
220
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
221 if (log.isDebugEnabled()) {
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
222 log.debug("Sent " + Packets.getMessageName(message[off] & 0xff) + " " + len + " bytes payload");
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
223 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
224
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
225 send_seq_number++;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
226 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
227
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
228 public int peekNextMessageLength() throws IOException {
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
229 if (recv_packet_header_present == false) {
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
230 cis.read(recv_packet_header_buffer, 0, 5);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
231 recv_packet_header_present = true;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
232 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
233
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
234 int packet_length = ((recv_packet_header_buffer[0] & 0xff) << 24)
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
235 | ((recv_packet_header_buffer[1] & 0xff) << 16) | ((recv_packet_header_buffer[2] & 0xff) << 8)
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
236 | ((recv_packet_header_buffer[3] & 0xff));
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
237 int padding_length = recv_packet_header_buffer[4] & 0xff;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
238
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
239 if (packet_length > TransportManager.MAX_PACKET_SIZE || packet_length < 12) {
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
240 throw new PacketFormatException(String.format("Illegal packet size (%d)", packet_length));
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
241 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
242
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
243 int payload_length = packet_length - padding_length - 1;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
244
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
245 if (payload_length < 0) {
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
246 throw new PacketFormatException(String.format("Illegal padding_length in packet from remote (%d)", padding_length));
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
247 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
248
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
249 return payload_length;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
250 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
251
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
252 public int receiveMessage(byte buffer[], int off, int len) throws IOException {
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
253 if (recv_packet_header_present == false) {
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
254 cis.read(recv_packet_header_buffer, 0, 5);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
255 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
256 else {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
257 recv_packet_header_present = false;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
258 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
259
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
260 int packet_length = ((recv_packet_header_buffer[0] & 0xff) << 24)
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
261 | ((recv_packet_header_buffer[1] & 0xff) << 16) | ((recv_packet_header_buffer[2] & 0xff) << 8)
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
262 | ((recv_packet_header_buffer[3] & 0xff));
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
263 int padding_length = recv_packet_header_buffer[4] & 0xff;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
264
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
265 if (packet_length > TransportManager.MAX_PACKET_SIZE || packet_length < 12) {
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
266 throw new PacketFormatException(String.format("Illegal packet size (%d)", packet_length));
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
267 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
268
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
269 int payload_length = packet_length - padding_length - 1;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
270
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
271 if (payload_length < 0) {
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
272 throw new PacketFormatException(String.format("Illegal padding_length in packet from remote (%d)", padding_length));
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
273 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
274
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
275 if (payload_length >= len) {
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
276 throw new IOException("Receive buffer too small (" + len + ", need " + payload_length + ")");
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
277 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
278
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
279 cis.read(buffer, off, payload_length);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
280 cis.read(recv_padding_buffer, 0, padding_length);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
281
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
282 if (recv_mac != null) {
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
283 cis.readPlain(recv_mac_buffer, 0, recv_mac_buffer.length);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
284 recv_mac.initMac(recv_seq_number);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
285 recv_mac.update(recv_packet_header_buffer, 0, 5);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
286 recv_mac.update(buffer, off, payload_length);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
287 recv_mac.update(recv_padding_buffer, 0, padding_length);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
288 recv_mac.getMac(recv_mac_buffer_cmp, 0);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
289
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
290 for (int i = 0; i < recv_mac_buffer.length; i++) {
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
291 if (recv_mac_buffer[i] != recv_mac_buffer_cmp[i]) {
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
292 throw new IOException("Remote sent corrupt MAC.");
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
293 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
294 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
295 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
296
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
297 recv_seq_number++;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
298
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
299 if (log.isDebugEnabled()) {
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
300 log.debug("Received " + Packets.getMessageName(buffer[off] & 0xff) + " " + payload_length
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
301 + " bytes payload");
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
302 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
303
307
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
304 if (recv_comp != null && can_compress) {
071eccdff8ea fix java formatting
Carl Byington <carl@five-ten-sg.com>
parents: 273
diff changeset
305 int[] uncomp_len = new int[] {payload_length};
273
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
306 buffer = recv_comp.uncompress(buffer, off, uncomp_len);
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
307 return uncomp_len[0];
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
308 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
309 else {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
310 return payload_length;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
311 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
312 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
313
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
314 public void startCompression() {
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
315 can_compress = true;
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
316 }
91a31873c42a start conversion from trilead to ganymed
Carl Byington <carl@five-ten-sg.com>
parents:
diff changeset
317 }