/** Handshake with the debuggee */
void handshake(Socket s, long timeout) throws IOException {
s.setSoTimeout((int) timeout);
byte[] hello = "JDWP-Handshake".getBytes("UTF-8");
s.getOutputStream().write(hello);
byte[] b = new byte[hello.length];
int received = 0;
while (received < hello.length) {
int n;
try {
n = s.getInputStream().read(b, received, hello.length - received);
} catch (SocketTimeoutException x) {
throw new IOException("handshake timeout");
}
if (n < 0) {
s.close();
throw new IOException("handshake failed - connection prematurally closed");
}
received += n;
}
for (int i = 0; i < hello.length; i++) {
if (b[i] != hello[i]) {
throw new IOException("handshake failed - unrecognized message from target VM");
}
}
// disable read timeout
s.setSoTimeout(0);
}
SocketConnection(Socket socket) throws IOException {
this.socket = socket;
socket.setTcpNoDelay(true);
socketInput = socket.getInputStream();
socketOutput = socket.getOutputStream();
}