import java.io.OutputStream;
import java.io.IOException;
+import static jexer.net.TelnetSocket.*;
+
/**
* TelnetOutputStream works with TelnetSocket to perform the telnet protocol.
*/
* @param master the master TelnetSocket
* @param output the underlying socket's OutputStream
*/
- TelnetOutputStream(TelnetSocket master, OutputStream output) {
+ TelnetOutputStream(final TelnetSocket master, final OutputStream output) {
this.master = master;
this.output = output;
}
/**
* Closes this output stream and releases any system resources associated
* with this stream.
+ *
+ * @throws IOException if an I/O error occurs
*/
@Override
public void close() throws IOException {
/**
* Flushes this output stream and forces any buffered output bytes to be
* written out.
+ *
+ * @throws IOException if an I/O error occurs
*/
@Override
public void flush() throws IOException {
- if ((master.nvt.binaryMode == false) && (master.nvt.writeCR == true)) {
+ if ((master.binaryMode == false) && (writeCR == true)) {
// The last byte sent to this.write() was a CR, which was never
// actually sent. So send the CR in ascii mode, then flush.
// CR <anything> -> CR NULL
- output.write(master.C_CR);
- output.write(master.C_NUL);
- master.nvt.writeCR = false;
+ output.write(C_CR);
+ output.write(C_NUL);
+ writeCR = false;
}
output.flush();
}
/**
* Writes b.length bytes from the specified byte array to this output
* stream.
+ *
+ * @param b the data.
+ * @throws IOException if an I/O error occurs
*/
@Override
- public void write(byte[] b) throws IOException {
+ public void write(final byte[] b) throws IOException {
writeImpl(b, 0, b.length);
}
/**
* Writes len bytes from the specified byte array starting at offset off
* to this output stream.
+ *
+ * @param b the data.
+ * @param off the start offset in the data.
+ * @param len the number of bytes to write.
+ * @throws IOException if an I/O error occurs
*/
@Override
- public void write(byte[] b, int off, int len) throws IOException {
+ public void write(final byte[] b, final int off,
+ final int len) throws IOException {
+
writeImpl(b, off, len);
}
/**
* Writes the specified byte to this output stream.
+ *
+ * @param b the byte to write.
+ * @throws IOException if an I/O error occurs
*/
@Override
- public void write(int b) throws IOException {
+ public void write(final int b) throws IOException {
byte [] bytes = new byte[1];
bytes[0] = (byte)b;
writeImpl(bytes, 0, 1);
/**
* Writes b.length bytes from the specified byte array to this output
* stream. Note package private access.
+ *
+ * @param b the data.
+ * @throws IOException if an I/O error occurs
*/
- void rawWrite(byte[] b) throws IOException {
+ void rawWrite(final byte[] b) throws IOException {
output.write(b, 0, b.length);
}
+ // Telnet protocol --------------------------------------------------------
+
+ /**
+ * When true, the last byte the caller passed to write() was a CR.
+ */
+ private boolean writeCR = false;
+
/**
* Writes len bytes from the specified byte array starting at offset off
* to this output stream.
+ *
+ * @param b the data.
+ * @param off the start offset in the data.
+ * @param len the number of bytes to write.
+ * @throws IOException if an I/O error occurs
*/
private void writeImpl(final byte[] b, final int off,
final int len) throws IOException {
// Flush what we have generated so far and reset the buffer,
// because the next byte could generate up to 4 output bytes
// (CR <something> <IAC> <IAC>).
- super.write(writeBuffer, 0, writeBufferI);
+ output.write(writeBuffer, 0, writeBufferI);
writeBufferI = 0;
}
// Pull the next byte
byte ch = b[i + off];
- if (master.nvt.binaryMode == true) {
+ if (master.binaryMode == true) {
- if (ch == master.TELNET_IAC) {
+ if (ch == TELNET_IAC) {
// IAC -> IAC IAC
- writeBuffer[writeBufferI++] = (byte)master.TELNET_IAC;
- writeBuffer[writeBufferI++] = (byte)master.TELNET_IAC;
+ writeBuffer[writeBufferI++] = (byte)TELNET_IAC;
+ writeBuffer[writeBufferI++] = (byte)TELNET_IAC;
} else {
// Anything else -> just send
writeBuffer[writeBufferI++] = ch;
// the case that the last byte of b was a CR.
// Bare carriage return -> CR NUL
- if (ch == master.C_CR) {
- if (master.nvt.writeCR == true) {
+ if (ch == C_CR) {
+ if (writeCR == true) {
// Flush the previous CR to the stream.
// CR <anything> -> CR NULL
- writeBuffer[writeBufferI++] = (byte)master.C_CR;
- writeBuffer[writeBufferI++] = (byte)master.C_NUL;
+ writeBuffer[writeBufferI++] = (byte)C_CR;
+ writeBuffer[writeBufferI++] = (byte)C_NUL;
}
- master.nvt.writeCR = true;
- } else if (ch == master.C_LF) {
- if (master.nvt.writeCR == true) {
+ writeCR = true;
+ } else if (ch == C_LF) {
+ if (writeCR == true) {
// CR LF -> CR LF
- writeBuffer[writeBufferI++] = (byte)master.C_CR;
- writeBuffer[writeBufferI++] = (byte)master.C_LF;
- master.nvt.writeCR = false;
+ writeBuffer[writeBufferI++] = (byte)C_CR;
+ writeBuffer[writeBufferI++] = (byte)C_LF;
+ writeCR = false;
} else {
// Bare LF -> LF
writeBuffer[writeBufferI++] = ch;
}
- } else if (ch == master.TELNET_IAC) {
- if (master.nvt.writeCR == true) {
+ } else if (ch == TELNET_IAC) {
+ if (writeCR == true) {
// CR <anything> -> CR NULL
- writeBuffer[writeBufferI++] = (byte)master.C_CR;
- writeBuffer[writeBufferI++] = (byte)master.C_NUL;
- master.nvt.writeCR = false;
+ writeBuffer[writeBufferI++] = (byte)C_CR;
+ writeBuffer[writeBufferI++] = (byte)C_NUL;
+ writeCR = false;
}
// IAC -> IAC IAC
- writeBuffer[writeBufferI++] = (byte)master.TELNET_IAC;
- writeBuffer[writeBufferI++] = (byte)master.TELNET_IAC;
+ writeBuffer[writeBufferI++] = (byte)TELNET_IAC;
+ writeBuffer[writeBufferI++] = (byte)TELNET_IAC;
} else {
- if (master.nvt.writeCR == true) {
+ if (writeCR == true) {
// CR <anything> -> CR NULL
- writeBuffer[writeBufferI++] = (byte)master.C_CR;
- writeBuffer[writeBufferI++] = (byte)master.C_NUL;
- master.nvt.writeCR = false;
+ writeBuffer[writeBufferI++] = (byte)C_CR;
+ writeBuffer[writeBufferI++] = (byte)C_NUL;
+ writeCR = false;
} else {
// Normal character */
writeBuffer[writeBufferI++] = ch;
if (writeBufferI > 0) {
// Flush what we have generated so far and reset the buffer.
- super.write(writeBuffer, 0, writeBufferI);
+ output.write(writeBuffer, 0, writeBufferI);
}
}
-
}