channel.socket().setReceiveBufferSize(receiveBufferSize);
channel.socket().setSendBufferSize(sendBufferSize);
}
private void negotiate(SocketChannel channel) throws IOException {
HeaderPacket header = PacketManager.readHeader(channel, 4);
byte[] body = PacketManager.readBytes(channel, header.getPacketBodyLength());
if (body[0] < 0) {// check field_count
if (body[0] == -1) {
ErrorPacket error = new ErrorPacket();
error.fromBytes(body);
throw new IOException("handshake exception:\n" + error.toString());
} else if (body[0] == -2) {
throw new IOException("Unexpected EOF packet at handshake phase.");
} else {
throw new IOException("unpexpected packet with field_count=" + body[0]);
}
}
HandshakeInitializationPacket handshakePacket = new HandshakeInitializationPacket();
handshakePacket.fromBytes(body);
logger.info("handshake initialization packet received, prepare the client authentication packet to send");
ClientAuthenticationPacket clientAuth = new ClientAuthenticationPacket();
clientAuth.setCharsetNumber(charsetNumber);
clientAuth.setUsername(username);
clientAuth.setPassword(password);
clientAuth.setServerCapabilities(handshakePacket.serverCapabilities);
clientAuth.setDatabaseName(defaultSchema);
clientAuth.setScrumbleBuff(joinAndCreateScrumbleBuff(handshakePacket));
byte[] clientAuthPkgBody = clientAuth.toBytes();
HeaderPacket h = new HeaderPacket();
h.setPacketBodyLength(clientAuthPkgBody.length);
h.setPacketSequenceNumber((byte) (header.getPacketSequenceNumber() + 1));
PacketManager.write(channel,
new ByteBuffer[] { ByteBuffer.wrap(h.toBytes()), ByteBuffer.wrap(clientAuthPkgBody) });
logger.info("client authentication packet is sent out.");
// check auth result
header = null;
header = PacketManager.readHeader(channel, 4);