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11
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1 /*
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2 * 510ConnectBot
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3 * Copyright 2014 Carl Byington
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4 *
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5 * Licensed under the Apache License, Version 2.0 (the "License");
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6 * you may not use this file except in compliance with the License.
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7 * You may obtain a copy of the License at
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8 *
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9 * http://www.apache.org/licenses/LICENSE-2.0
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10 *
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11 * Unless required by applicable law or agreed to in writing, software
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12 * distributed under the License is distributed on an "AS IS" BASIS,
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13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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14 * See the License for the specific language governing permissions and
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15 * limitations under the License.
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16 */
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17
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18 package com.five_ten_sg.connectbot.transport;
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19
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20 import java.io.IOException;
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21 import java.io.InputStream;
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22 import java.io.OutputStream;
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23 import java.net.Socket;
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24 import java.net.SocketException;
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25 import java.util.List;
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26 import java.util.Map;
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27
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28 import com.five_ten_sg.connectbot.bean.HostBean;
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29 import com.five_ten_sg.connectbot.bean.PortForwardBean;
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30 import com.five_ten_sg.connectbot.service.TerminalBridge;
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31 import com.five_ten_sg.connectbot.service.TerminalManager;
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32 import com.five_ten_sg.connectbot.util.HostDatabase;
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33
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34 import android.content.Context;
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35 import android.net.Uri;
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36
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37 import org.tn5250j.framework.tn5250.tnvt;
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38
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39
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40 /**
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41 * @author Carl Byington
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42 *
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43 */
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44 public class TN5250 extends AbsTransport {
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45 private static final String PROTOCOL = "tn5250";
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46 private static final String TAG = "ConnectBot.tn5250";
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47 private static final int DEFAULT_PORT = 23;
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48 private Screen5250 screen52;
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49
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50 private tnvt handler = null;
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51 private Socket socket;
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52
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53 private InputStream is;
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54 private OutputStream os;
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55 private int width;
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56 private int height;
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57
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58 private boolean connected = false;
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59
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60 public TN5250() {
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61 super();
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62 }
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63
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64 public TN5250(HostBean host, TerminalBridge bridge, TerminalManager manager) {
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65 super(host, bridge, manager);
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66 handler = new tnvt(screen52, true, false, bridge, manager);
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67 }
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68
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69
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70 /**
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71 * @return protocol part of the URI
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72 */
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73 public static String getProtocolName() {
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74 return PROTOCOL;
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75 }
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76
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77 /**
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78 * Encode the current transport into a URI that can be passed via intent calls.
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79 * @return URI to host
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80 */
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81 public static Uri getUri(String input) {
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82 return null;
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83 }
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84
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85 /**
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86 * Causes transport to connect to the target host. After connecting but before a
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87 * session is started, must call back to {@link TerminalBridge#onConnected()}.
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88 * After that call a session may be opened.
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89 */
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90 @Override
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91 public void connect() {
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92 try {
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93 connected = tnvt.connect(host.getHostname(), host.getPort());
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94 is = tnvt.bin;
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95 os = tnvt.bout;
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96 bridge.onConnected();
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97 }
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98 catch (UnknownHostException e) {
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99 Log.d(TAG, "IO Exception connecting to host", e);
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100 }
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101 catch (IOException e) {
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102 Log.d(TAG, "IO Exception connecting to host", e);
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103 }
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104 }
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105
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106
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107 /**
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108 * Checks if read() will block. If there are no bytes remaining in
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109 * the underlying transport, return true.
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110 */
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111 @Override
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112 public boolean willBlock() {
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113 if (is == null) return true;
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114 try {
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115 return is.available() == 0;
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116 } catch (Exception e) {
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117 return true;
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118 }
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119 }
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120
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121 /**
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122 * Reads from the transport. Transport must support reading into a byte array
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123 * <code>buffer</code> at the start of <code>offset</code> and a maximum of
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124 * <code>length</code> bytes. If the remote host disconnects, throw an
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125 * {@link IOException}.
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126 * @param buffer byte buffer to store read bytes into
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127 * @param offset where to start writing in the buffer
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128 * @param length maximum number of bytes to read
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129 * @return number of bytes read
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130 * @throws IOException when remote host disconnects
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131 */
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132 public int read(byte[] buffer, int offset, int length) throws IOException {
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133 return 0;
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134 }
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135
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136
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137 /**
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138 * Writes to the transport. If the host is not yet connected, simply return without
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139 * doing anything. An {@link IOException} should be thrown if there is an error after
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140 * connection.
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141 * @param buffer bytes to write to transport
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142 * @throws IOException when there is a problem writing after connection
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143 */
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144 public void write(byte[] buffer) throws IOException {
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145 }
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146
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147 /**
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148 * Writes to the transport. See {@link #write(byte[])} for behavior details.
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149 * @param c character to write to the transport
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150 * @throws IOException when there is a problem writing after connection
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151 */
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152 public void write(int c) throws IOException {
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153 }
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154
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155 /**
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156 * Flushes the write commands to the transport.
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157 * @throws IOException when there is a problem writing after connection
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158 */
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159 public void flush() throws IOException {
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160 }
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161
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162 /**
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163 * Closes the connection to the terminal. Note that the resulting failure to read
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164 * should call {@link TerminalBridge#dispatchDisconnect(boolean)}.
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165 */
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166 public void close() {
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167 tnvt.disconnect();
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168 connected = false;
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169 }
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170
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171 /**
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172 * Tells the transport what dimensions the display is currently
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173 * @param columns columns of text
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174 * @param rows rows of text
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175 * @param width width in pixels
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176 * @param height height in pixels
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177 */
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178 @Override
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179 public void setDimensions(int columns, int rows, int width, int height) {
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180 // do nothing
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181 }
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182
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183 public void setOptions(Map<String, String> options) {
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184 // do nothing
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185 }
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186
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187 public Map<String, String> getOptions() {
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188 return null;
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189 }
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190
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191 public void setCompression(boolean compression) {
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192 // do nothing
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193 }
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194
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195 public void setHttpproxy(String httpproxy) {
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196 // do nothing
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197 }
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198
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199 public void setUseAuthAgent(String useAuthAgent) {
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200 // do nothing
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201 }
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202
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203 public void setEmulation(String emulation) {
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204 this.emulation = emulation;
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205 }
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206
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207 public String getEmulation() {
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208 return emulation;
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209 }
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210
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211 public void setHost(HostBean host) {
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212 this.host = host;
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213 }
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214
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215 public void setBridge(TerminalBridge bridge) {
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216 this.bridge = bridge;
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217 }
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218
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219 public void setManager(TerminalManager manager) {
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220 this.manager = manager;
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221 }
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222
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223 /**
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224 * Whether or not this transport type can forward ports.
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225 * @return true on ability to forward ports
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226 */
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227 public boolean canForwardPorts() {
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228 return false;
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229 }
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230
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231 /**
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232 * Adds the {@link PortForwardBean} to the list.
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233 * @param portForward the port forward bean to add
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234 * @return true on successful addition
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235 */
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236 public boolean addPortForward(PortForwardBean portForward) {
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237 return false;
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238 }
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239
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240 /**
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241 * Enables a port forward member. After calling this method, the port forward should
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242 * be operational iff it could be enabled by the transport.
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243 * @param portForward member of our current port forwards list to enable
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244 * @return true on successful port forward setup
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245 */
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246 public boolean enablePortForward(PortForwardBean portForward) {
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247 return false;
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248 }
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249
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250 /**
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251 * Disables a port forward member. After calling this method, the port forward should
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252 * be non-functioning iff it could be disabled by the transport.
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253 * @param portForward member of our current port forwards list to enable
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254 * @return true on successful port forward tear-down
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255 */
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256 public boolean disablePortForward(PortForwardBean portForward) {
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257 return false;
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258 }
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259
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260 /**
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261 * Removes the {@link PortForwardBean} from the available port forwards.
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262 * @param portForward the port forward bean to remove
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263 * @return true on successful removal
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264 */
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265 public boolean removePortForward(PortForwardBean portForward) {
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266 return false;
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267 }
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268
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269 /**
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270 * Gets a list of the {@link PortForwardBean} currently used by this transport.
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271 * @return the list of port forwards
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272 */
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273 public List<PortForwardBean> getPortForwards() {
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274 return null;
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275 }
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276
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277 /**
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278 * Whether or not this transport type can transfer files.
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279 * @return true on ability to transfer files
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280 */
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281 public boolean canTransferFiles() {
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282 return false;
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283 }
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284
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285 /**
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286 * Downloads the specified remote file to a local folder.
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287 * @param remoteFile The path to the remote file to be downloaded. Must be non-null.
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288 * @param localFolder The path to local folder. Null = default external storage folder.
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289 * @return true on success, false on failure
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290 */
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291 public boolean downloadFile(String remoteFile, String localFolder) {
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292 return false;
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293 }
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294
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295 /**
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296 * Uploads the specified local file to the remote host.
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297 * @param localFile The path to the local file to be uploaded. Must be non-null.
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298 * @param remoteFolder The path to the remote directory. Null == default remote directory.
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299 * @return true on success, false on failure
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300 */
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301 public boolean uploadFile(String localFile, String remoteFile,
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302 String remoteFolder, String mode) {
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303 return false;
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304 }
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305
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306 @Override
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307 public int getDefaultPort() {
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308 return DEFAULT_PORT;
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309 }
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310
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311 @Override
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312 public boolean isConnected() {
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313 return connected;
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314 }
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315
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316 @Override
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317 public boolean isSessionOpen() {
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318 return connected;
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319 }
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320
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321 @Override
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322 public boolean isAuthenticated() {
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323 return connected;
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324 }
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325
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326
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327 @Override
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328 public String getDefaultNickname(String username, String hostname, int port) {
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329 if (port == DEFAULT_PORT) {
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330 return String.format("%s", hostname);
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331 }
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332 else {
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333 return String.format("%s:%d", hostname, port);
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334 }
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335 }
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336
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337 @Override
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338 public void getSelectionArgs(Uri uri, Map<String, String> selection) {
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339 selection.put(HostDatabase.FIELD_HOST_PROTOCOL, PROTOCOL);
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340 selection.put(HostDatabase.FIELD_HOST_NICKNAME, uri.getFragment());
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341 selection.put(HostDatabase.FIELD_HOST_HOSTNAME, uri.getHost());
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342 int port = uri.getPort();
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343
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344 if (port < 0)
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345 port = DEFAULT_PORT;
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346
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347 selection.put(HostDatabase.FIELD_HOST_PORT, Integer.toString(port));
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348 }
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349
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350
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351 @Override
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352 public HostBean createHost(Uri uri) {
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353 HostBean host = new HostBean();
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354 host.setProtocol(PROTOCOL);
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355 host.setHostname(uri.getHost());
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356 int port = uri.getPort();
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357
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358 if (port < 0)
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359 port = DEFAULT_PORT;
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360
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361 host.setPort(port);
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362 String nickname = uri.getFragment();
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363
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364 if (nickname == null || nickname.length() == 0) {
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365 host.setNickname(getDefaultNickname(host.getUsername(),
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366 host.getHostname(), host.getPort()));
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367 }
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368 else {
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369 host.setNickname(uri.getFragment());
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370 }
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371
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372 return host;
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373 }
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374
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375
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376 public static String getFormatHint(Context context) {
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377 return String.format("%s:%s",
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378 context.getString(R.string.format_hostname),
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379 context.getString(R.string.format_port));
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380 }
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381
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382
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383 @Override
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384 public boolean usesNetwork() {
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385 return true;
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386 }
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387 }
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