--- /dev/null
+/*
+ * Jexer - Java Text User Interface
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (C) 2019 Kevin Lamonte
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * @author Kevin Lamonte [kevin.lamonte@gmail.com]
+ * @version 1
+ */
+package jexer.net;
+
+import java.io.InputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.net.Socket;
+
+/**
+ * This class provides a Socket that performs the telnet protocol to both
+ * establish an 8-bit clean no echo channel and expose window resize events
+ * to the Jexer ECMA48 backend.
+ */
+public class TelnetSocket extends Socket {
+
+ // ------------------------------------------------------------------------
+ // Constants --------------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ // Telnet protocol special characters. Note package private access.
+ static final int TELNET_SE = 240;
+ static final int TELNET_NOP = 241;
+ static final int TELNET_DM = 242;
+ static final int TELNET_BRK = 243;
+ static final int TELNET_IP = 244;
+ static final int TELNET_AO = 245;
+ static final int TELNET_AYT = 246;
+ static final int TELNET_EC = 247;
+ static final int TELNET_EL = 248;
+ static final int TELNET_GA = 249;
+ static final int TELNET_SB = 250;
+ static final int TELNET_WILL = 251;
+ static final int TELNET_WONT = 252;
+ static final int TELNET_DO = 253;
+ static final int TELNET_DONT = 254;
+ static final int TELNET_IAC = 255;
+ static final int C_NUL = 0x00;
+ static final int C_LF = 0x0A;
+ static final int C_CR = 0x0D;
+
+ // ------------------------------------------------------------------------
+ // Variables --------------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * The telnet-aware socket InputStream.
+ */
+ private TelnetInputStream input;
+
+ /**
+ * The telnet-aware socket OutputStream.
+ */
+ private TelnetOutputStream output;
+
+
+ /**
+ * If true, this is a server socket (i.e. created by accept()).
+ */
+ boolean isServer = true;
+
+ /**
+ * If true, telnet ECHO mode is set such that local echo is off and
+ * remote echo is on. This is appropriate for server sockets.
+ */
+ boolean echoMode = false;
+
+ /**
+ * If true, telnet BINARY mode is enabled. We always want this to
+ * ensure a Unicode-safe stream.
+ */
+ boolean binaryMode = false;
+
+ /**
+ * If true, the SUPPRESS-GO-AHEAD option is enabled. We always want
+ * this.
+ */
+ boolean goAhead = true;
+
+ /**
+ * If true, request the client terminal type.
+ */
+ boolean doTermType = true;
+
+ /**
+ * If true, request the client terminal speed.
+ */
+ boolean doTermSpeed = true;
+
+ /**
+ * If true, request the Negotiate About Window Size option to
+ * determine the client text width/height.
+ */
+ boolean doNAWS = true;
+
+ /**
+ * If true, request the New Environment option to obtain the client
+ * LOGNAME, USER, and LANG variables.
+ */
+ boolean doEnvironment = true;
+
+ /**
+ * The terminal type reported by the client.
+ */
+ String terminalType = "";
+
+ /**
+ * The terminal speed reported by the client.
+ */
+ String terminalSpeed = "";
+
+ // ------------------------------------------------------------------------
+ // Constructors -----------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * Creates a Socket that knows the telnet protocol. Note package private
+ * access, this is only used by TelnetServerSocket.
+ *
+ * @throws IOException if an I/O error occurs
+ */
+ TelnetSocket() throws IOException {
+ super();
+ }
+
+ // ------------------------------------------------------------------------
+ // Socket -----------------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * Returns an input stream for this socket.
+ *
+ * @return the input stream
+ * @throws IOException if an I/O error occurs
+ */
+ @Override
+ public InputStream getInputStream() throws IOException {
+ if (input == null) {
+ assert (output == null);
+ output = new TelnetOutputStream(this, super.getOutputStream());
+ input = new TelnetInputStream(this, super.getInputStream(), output);
+ input.telnetSendOptions();
+ }
+ return input;
+ }
+
+ /**
+ * Returns an output stream for this socket.
+ *
+ * @return the output stream
+ * @throws IOException if an I/O error occurs
+ */
+ @Override
+ public OutputStream getOutputStream() throws IOException {
+ if (output == null) {
+ assert (input == null);
+ output = new TelnetOutputStream(this, super.getOutputStream());
+ input = new TelnetInputStream(this, super.getInputStream(), output);
+ input.telnetSendOptions();
+ }
+ return output;
+ }
+
+ // ------------------------------------------------------------------------
+ // TelnetSocket -----------------------------------------------------------
+ // ------------------------------------------------------------------------
+
+ /**
+ * See if telnet server/client is in ASCII mode.
+ *
+ * @return if true, this connection is in ASCII mode
+ */
+ public boolean isAscii() {
+ return (!binaryMode);
+ }
+
+}
git://git.nikiroo.be / fanfix.git / blobdiff