+++ /dev/null
-/**
- * Jexer - Java Text User Interface
- *
- * License: LGPLv3 or later
- *
- * This module is licensed under the GNU Lesser General Public License
- * Version 3. Please see the file "COPYING" in this directory for more
- * information about the GNU Lesser General Public License Version 3.
- *
- * Copyright (C) 2015 Kevin Lamonte
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public License
- * as published by the Free Software Foundation; either version 3 of
- * the License, or (at your option) any later version.
- *
- * This program 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 for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this program; if not, see
- * http://www.gnu.org/licenses/, or write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA
- *
- * @author Kevin Lamonte [kevin.lamonte@gmail.com]
- * @version 1
- */
-package jexer.net;
-
-import java.io.InputStream;
-import java.io.IOException;
-import java.util.Map;
-import java.util.TreeMap;
-
-import jexer.session.SessionInfo;
-import static jexer.net.TelnetSocket.*;
-
-/**
- * TelnetInputStream works with TelnetSocket to perform the telnet protocol.
- */
-public final class TelnetInputStream extends InputStream implements SessionInfo {
-
- /**
- * The root TelnetSocket that has my telnet protocol state.
- */
- private TelnetSocket master;
-
- /**
- * The raw socket's InputStream.
- */
- private InputStream input;
-
- /**
- * Package private constructor.
- *
- * @param master the master TelnetSocket
- * @param input the underlying socket's InputStream
- */
- TelnetInputStream(TelnetSocket master, InputStream input) {
- this.master = master;
- this.input = input;
- }
-
- // SessionInfo interface --------------------------------------------------
-
- /**
- * User name.
- */
- private String username = "";
-
- /**
- * Language.
- */
- private String language = "en_US";
-
- /**
- * Text window width.
- */
- private int windowWidth = 80;
-
- /**
- * Text window height.
- */
- private int windowHeight = 24;
-
- /**
- * Username getter.
- *
- * @return the username
- */
- public String getUsername() {
- return this.username;
- }
-
- /**
- * Username setter.
- *
- * @param username the value
- */
- public void setUsername(final String username) {
- this.username = username;
- }
-
- /**
- * Language getter.
- *
- * @return the language
- */
- public String getLanguage() {
- return this.language;
- }
-
- /**
- * Language setter.
- *
- * @param language the value
- */
- public void setLanguage(final String language) {
- this.language = language;
- }
-
- /**
- * Text window width getter.
- *
- * @return the window width
- */
- public int getWindowWidth() {
- return windowWidth;
- }
-
- /**
- * Text window height getter.
- *
- * @return the window height
- */
- public int getWindowHeight() {
- return windowHeight;
- }
-
- /**
- * Re-query the text window size.
- */
- public void queryWindowSize() {
- // NOP
- }
-
- // InputStream interface --------------------------------------------------
-
- /**
- * Returns an estimate of the number of bytes that can be read (or
- * skipped over) from this input stream without blocking by the next
- * invocation of a method for this input stream.
- *
- */
- @Override
- public int available() throws IOException {
- // TODO
- return 0;
- }
-
- /**
- * Closes this input stream and releases any system resources associated
- * with the stream.
- */
- @Override
- public void close() throws IOException {
- // TODO
- }
-
- /**
- * Marks the current position in this input stream.
- */
- @Override
- public void mark(int readlimit) {
- // TODO
- }
-
- /**
- * Tests if this input stream supports the mark and reset methods.
- */
- @Override
- public boolean markSupported() {
- return false;
- }
-
- /**
- * Reads the next byte of data from the input stream.
- */
- @Override
- public int read() throws IOException {
- // TODO
- return -1;
- }
-
- /**
- * Reads some number of bytes from the input stream and stores them into
- * the buffer array b.
- */
- @Override
- public int read(byte[] b) throws IOException {
- // TODO
- return -1;
- }
-
- /**
- * Reads up to len bytes of data from the input stream into an array of
- * bytes.
- */
- @Override
- public int read(byte[] b, int off, int len) throws IOException {
- // TODO
- return -1;
- }
-
- /**
- * Repositions this stream to the position at the time the mark method
- * was last called on this input stream.
- */
- @Override
- public void reset() throws IOException {
- // TODO
- }
-
- /**
- * Skips over and discards n bytes of data from this input stream.
- */
- @Override
- public long skip(long n) throws IOException {
- // TODO
- return -1;
- }
-
-
- // Telnet protocol --------------------------------------------------------
-
- /**
- * The subnegotiation buffer.
- */
- private byte [] subnegBuffer;
-
- /**
- * For debugging, return a descriptive string for this telnet option.
- * These are pulled from: http://www.iana.org/assignments/telnet-options
- *
- * @return a string describing the telnet option code
- */
- private String optionString(final int option) {
- switch (option) {
- case 0: return "Binary Transmission";
- case 1: return "Echo";
- case 2: return "Reconnection";
- case 3: return "Suppress Go Ahead";
- case 4: return "Approx Message Size Negotiation";
- case 5: return "Status";
- case 6: return "Timing Mark";
- case 7: return "Remote Controlled Trans and Echo";
- case 8: return "Output Line Width";
- case 9: return "Output Page Size";
- case 10: return "Output Carriage-Return Disposition";
- case 11: return "Output Horizontal Tab Stops";
- case 12: return "Output Horizontal Tab Disposition";
- case 13: return "Output Formfeed Disposition";
- case 14: return "Output Vertical Tabstops";
- case 15: return "Output Vertical Tab Disposition";
- case 16: return "Output Linefeed Disposition";
- case 17: return "Extended ASCII";
- case 18: return "Logout";
- case 19: return "Byte Macro";
- case 20: return "Data Entry Terminal";
- case 21: return "SUPDUP";
- case 22: return "SUPDUP Output";
- case 23: return "Send Location";
- case 24: return "Terminal Type";
- case 25: return "End of Record";
- case 26: return "TACACS User Identification";
- case 27: return "Output Marking";
- case 28: return "Terminal Location Number";
- case 29: return "Telnet 3270 Regime";
- case 30: return "X.3 PAD";
- case 31: return "Negotiate About Window Size";
- case 32: return "Terminal Speed";
- case 33: return "Remote Flow Control";
- case 34: return "Linemode";
- case 35: return "X Display Location";
- case 36: return "Environment Option";
- case 37: return "Authentication Option";
- case 38: return "Encryption Option";
- case 39: return "New Environment Option";
- case 40: return "TN3270E";
- case 41: return "XAUTH";
- case 42: return "CHARSET";
- case 43: return "Telnet Remote Serial Port (RSP)";
- case 44: return "Com Port Control Option";
- case 45: return "Telnet Suppress Local Echo";
- case 46: return "Telnet Start TLS";
- case 47: return "KERMIT";
- case 48: return "SEND-URL";
- case 49: return "FORWARD_X";
- case 138: return "TELOPT PRAGMA LOGON";
- case 139: return "TELOPT SSPI LOGON";
- case 140: return "TELOPT PRAGMA HEARTBEAT";
- case 255: return "Extended-Options-List";
- default:
- if ((option >= 50) && (option <= 137)) {
- return "Unassigned";
- }
- return "UNKNOWN - OTHER";
- }
- }
-
- /**
- * Send a DO/DON'T/WILL/WON'T response to the remote side.
- *
- * @param response a TELNET_DO/DONT/WILL/WONT byte
- * @param option telnet option byte (binary mode, term type, etc.)
- */
- private void respond(final int response,
- final int option) throws IOException {
-
- byte [] buffer = new byte[3];
- buffer[0] = (byte)TELNET_IAC;
- buffer[1] = (byte)response;
- buffer[2] = (byte)option;
-
- master.output.write(buffer);
- }
-
- /**
- * Tell the remote side we WILL support an option.
- *
- * @param option telnet option byte (binary mode, term type, etc.)
- */
- private void WILL(final int option) throws IOException {
- respond(TELNET_WILL, option);
- }
-
- /**
- * Tell the remote side we WON'T support an option.
- *
- * @param option telnet option byte (binary mode, term type, etc.)
- */
- private void WONT(final int option) throws IOException {
- respond(TELNET_WONT, option);
- }
-
- /**
- * Tell the remote side we DO support an option.
- *
- * @param option telnet option byte (binary mode, term type, etc.)
- */
- private void DO(final int option) throws IOException {
- respond(TELNET_DO, option);
- }
-
- /**
- * Tell the remote side we DON'T support an option.
- *
- * @param option telnet option byte (binary mode, term type, etc.)
- */
- private void DONT(final int option) throws IOException {
- respond(TELNET_DONT, option);
- }
-
- /**
- * Tell the remote side we WON't or DON'T support an option.
- *
- * @param remoteQuery a TELNET_DO/DONT/WILL/WONT byte
- * @param option telnet option byte (binary mode, term type, etc.)
- */
- private void refuse(final int remoteQuery,
- final int option) throws IOException {
-
- if (remoteQuery == TELNET_DO) {
- WONT(option);
- } else {
- DONT(option);
- }
- }
-
- /**
- * Build sub-negotiation packet (RFC 855)
- *
- * @param option telnet option
- * @param response output buffer of response bytes
- */
- private void telnetSendSubnegResponse(final int option,
- final byte [] response) throws IOException {
-
- byte [] buffer = new byte[response.length + 5];
- buffer[0] = (byte)TELNET_IAC;
- buffer[1] = (byte)TELNET_SB;
- buffer[2] = (byte)option;
- System.arraycopy(response, 0, buffer, 3, response.length);
- buffer[response.length + 3] = (byte)TELNET_IAC;
- buffer[response.length + 4] = (byte)TELNET_SE;
- master.output.write(buffer);
- }
-
- /**
- * Telnet option: Terminal Speed (RFC 1079). Client side.
- */
- private void telnetSendTerminalSpeed() throws IOException {
- byte [] response = {0, '3', '8', '4', '0', '0', ',',
- '3', '8', '4', '0', '0'};
- telnetSendSubnegResponse(32, response);
- }
-
- /**
- * Telnet option: Terminal Type (RFC 1091). Client side.
- */
- private void telnetSendTerminalType() throws IOException {
- byte [] response = {0, 'v', 't', '1', '0', '0' };
- telnetSendSubnegResponse(24, response);
- }
-
- /**
- * Telnet option: Terminal Type (RFC 1091). Server side.
- */
- private void requestTerminalType() throws IOException {
- byte [] response = new byte[1];
- response[0] = 1;
- telnetSendSubnegResponse(24, response);
- }
-
- /**
- * Telnet option: Terminal Speed (RFC 1079). Server side.
- */
- private void requestTerminalSpeed() throws IOException {
- byte [] response = new byte[1];
- response[0] = 1;
- telnetSendSubnegResponse(32, response);
- }
-
- /**
- * Telnet option: New Environment (RFC 1572). Server side.
- */
- private void requestEnvironment() throws IOException {
- byte [] response = new byte[1];
- response[0] = 1;
- telnetSendSubnegResponse(39, response);
- }
-
- /**
- * Send the options we want to negotiate on:
- * Binary Transmission RFC 856
- * Suppress Go Ahead RFC 858
- * Negotiate About Window Size RFC 1073
- * Terminal Type RFC 1091
- * Terminal Speed RFC 1079
- * New Environment RFC 1572
- *
- * When run as a server:
- * Echo
- */
- private void telnetSendOptions() throws IOException {
- if (master.nvt.binaryMode == false) {
- // Binary Transmission: must ask both do and will
- DO(0);
- WILL(0);
- }
-
- if (master.nvt.goAhead == true) {
- // Suppress Go Ahead
- DO(3);
- WILL(3);
- }
-
- // Server only options
- if (master.nvt.isServer == true) {
- // Enable Echo - I echo to them, they do not echo back to me.
- DONT(1);
- WILL(1);
-
- if (master.nvt.doTermType == true) {
- // Terminal type - request it
- DO(24);
- }
-
- if (master.nvt.doTermSpeed == true) {
- // Terminal speed - request it
- DO(32);
- }
-
- if (master.nvt.doNAWS == true) {
- // NAWS - request it
- DO(31);
- }
-
- if (master.nvt.doEnvironment == true) {
- // Environment - request it
- DO(39);
- }
-
- } else {
-
- if (master.nvt.doTermType == true) {
- // Terminal type - request it
- WILL(24);
- }
-
- if (master.nvt.doTermSpeed == true) {
- // Terminal speed - request it
- WILL(32);
- }
-
- if (master.nvt.doNAWS == true) {
- // NAWS - request it
- WILL(31);
- }
-
- if (master.nvt.doEnvironment == true) {
- // Environment - request it
- WILL(39);
- }
-
- }
- }
-
- /**
- * New Environment parsing state.
- */
- private enum EnvState {
- INIT,
- TYPE,
- NAME,
- VALUE
- }
-
- /**
- * Handle the New Environment option. Note that this implementation
- * fails to handle ESC as defined in RFC 1572.
- */
- private void handleNewEnvironment() {
- Map<StringBuilder, StringBuilder> newEnv = new TreeMap<StringBuilder, StringBuilder>();
- EnvState state = EnvState.INIT;
- StringBuilder name = new StringBuilder();
- StringBuilder value = new StringBuilder();
-
- for (int i = 0; i < subnegBuffer.length; i++) {
- byte b = subnegBuffer[i];
-
- switch (state) {
-
- case INIT:
- // Looking for "IS"
- if (b == 0) {
- state = EnvState.TYPE;
- } else {
- // The other side isn't following the rules, see ya.
- return;
- }
- break;
-
- case TYPE:
- // Looking for "VAR" or "USERVAR"
- if (b == 0) {
- // VAR
- state = EnvState.NAME;
- name = new StringBuilder();
- } else if (b == 3) {
- // USERVAR
- state = EnvState.NAME;
- name = new StringBuilder();
- } else {
- // The other side isn't following the rules, see ya
- return;
- }
- break;
-
- case NAME:
- // Looking for "VALUE" or a name byte
- if (b == 1) {
- // VALUE
- state = EnvState.VALUE;
- value = new StringBuilder();
- } else {
- // Take it as an environment variable name/key byte
- name.append((char)b);
- }
-
- break;
-
- case VALUE:
- // Looking for "VAR", "USERVAR", or a name byte, or the end
- if (b == 0) {
- // VAR
- state = EnvState.NAME;
- if (value.length() > 0) {
- newEnv.put(name, value);
- }
- name = new StringBuilder();
- } else if (b == 3) {
- // USERVAR
- state = EnvState.NAME;
- if (value.length() > 0) {
- newEnv.put(name, value);
- }
- name = new StringBuilder();
- } else {
- // Take it as an environment variable value byte
- value.append((char)b);
- }
- break;
- }
- }
-
- if ((name.length() > 0) && (value.length() > 0)) {
- newEnv.put(name, value);
- }
-
- for (StringBuilder key: newEnv.keySet()) {
- if (key.equals("LANG")) {
- language = newEnv.get(key).toString();
- }
- if (key.equals("LOGNAME")) {
- username = newEnv.get(key).toString();
- }
- if (key.equals("USER")) {
- username = newEnv.get(key).toString();
- }
- }
- }
-
- /**
- * Handle an option sub-negotiation.
- */
- private void handleSubneg() throws IOException {
- byte option;
-
- // Sanity check: there must be at least 1 byte in subnegBuffer
- if (subnegBuffer.length < 1) {
- // Buffer too small: the other side is a broken telnetd, it did
- // not send the right sub-negotiation data. Bail out now.
- return;
- }
- option = subnegBuffer[0];
-
- switch (option) {
-
- case 24:
- // Terminal Type
- if ((subnegBuffer.length > 1) && (subnegBuffer[1] == 1)) {
- // Server sent "SEND", we say "IS"
- telnetSendTerminalType();
- }
- if ((subnegBuffer.length > 1) && (subnegBuffer[1] == 0)) {
- // Client sent "IS", record it
- StringBuilder terminalString = new StringBuilder();
- for (int i = 2; i < subnegBuffer.length; i++) {
- terminalString.append((char)subnegBuffer[i]);
- }
- master.nvt.terminal = terminalString.toString();
- }
- break;
-
- case 32:
- // Terminal Speed
- if ((subnegBuffer.length > 1) && (subnegBuffer[1] == 1)) {
- // Server sent "SEND", we say "IS"
- telnetSendTerminalSpeed();
- }
- if ((subnegBuffer.length > 1) && (subnegBuffer[1] == 0)) {
- // Client sent "IS", record it
- StringBuilder speedString = new StringBuilder();
- for (int i = 2; i < subnegBuffer.length; i++) {
- speedString.append((char)subnegBuffer[i]);
- }
- String termSpeed = speedString.toString();
- }
- break;
-
- case 31:
- // NAWS
- if (subnegBuffer.length >= 5) {
- int i = 0;
-
- i++;
- if (subnegBuffer[i] == TELNET_IAC) {
- i++;
- }
- windowWidth = subnegBuffer[i] * 256;
-
- i++;
- if (subnegBuffer[i] == TELNET_IAC) {
- i++;
- }
- windowWidth += subnegBuffer[i];
-
- i++;
- if (subnegBuffer[i] == TELNET_IAC) {
- i++;
- }
- windowHeight = subnegBuffer[i] * 256;
-
- i++;
- if (subnegBuffer[i] == TELNET_IAC) {
- i++;
- }
- windowHeight += subnegBuffer[i];
- }
- break;
-
- case 39:
- // Environment
- handleNewEnvironment();
- break;
-
- default:
- // Ignore this one
- break;
- }
- }
-
-
-}
git://git.nikiroo.be / fanfix.git / blobdiff