boolean initiateConnection(Connection conn_, Peer peer) {
TCPConnection conn = (TCPConnection) conn_;
try {
SocketChannel channel = SocketChannel.open();
InetSocketAddress localAddress = new InetSocketAddress(conn.host_id, 0);
channel.socket().bind(localAddress);
channel.configureBlocking(false);
try {
InetSocketAddress remoteAddress = new InetSocketAddress(peer.host(), peer.port());
if (channel.connect(remoteAddress)) {
// This only happens on Solaris when connecting locally
logger.log(Level.FINEST, "Connected!");
conn.state = Connection.State.connected_out;
conn.channel = channel;
selector.wakeup();
channel.register(selector, SelectionKey.OP_READ, conn);
initiateCER(conn);
return true;
}
} catch (java.nio.channels.UnresolvedAddressException ex) {
channel.close();
return false;
}
conn.state = Connection.State.connecting;
conn.channel = channel;
selector.wakeup();
channel.register(selector, SelectionKey.OP_CONNECT, conn);
} catch (java.io.IOException ex) {
logger.log(
Level.WARNING,
"java.io.IOException caught while initiating connection to '" + peer.host() + "'.",
ex);
}
return true;
}
private void handleWritable(Connection conn_) {
TCPConnection conn = (TCPConnection) conn_;
logger.log(Level.FINEST, "handleWritable():");
ByteBuffer net_out_buffer = conn.connection_buffers.netOutBuffer();
// int bytes = net_out_buffer.position();
// net_out_buffer.rewind();
// net_out_buffer.limit(bytes);
net_out_buffer.flip();
// logger.log(Level.FINEST," :bytes= " + bytes);
int count;
try {
count = conn.channel.write(net_out_buffer);
if (count < 0) {
closeConnection(conn);
return;
}
// conn.consumeNetOutBuffer(count);
net_out_buffer.compact();
conn.processAppOutBuffer();
if (!conn.hasNetOutput()) conn.channel.register(selector, SelectionKey.OP_READ, conn);
} catch (java.io.IOException ex) {
closeConnection(conn);
return;
}
}
private void handleReadable(TCPConnection conn) {
logger.log(Level.FINEST, "handlereadable()...");
conn.makeSpaceInNetInBuffer();
ConnectionBuffers connection_buffers = conn.connection_buffers;
logger.log(
Level.FINEST,
"pre: conn.in_buffer.position=" + connection_buffers.netInBuffer().position());
int count;
try {
int loop_count = 0;
while ((count = conn.channel.read(connection_buffers.netInBuffer())) > 0
&& loop_count++ < 3) {
logger.log(
Level.FINEST,
"readloop: connection_buffers.netInBuffer().position="
+ connection_buffers.netInBuffer().position());
conn.makeSpaceInNetInBuffer();
}
} catch (java.io.IOException ex) {
logger.log(Level.FINE, "got IOException", ex);
closeConnection(conn);
return;
}
conn.processNetInBuffer();
processInBuffer(conn);
if (count < 0 && conn.state != Connection.State.closed) {
logger.log(Level.FINE, "count<0");
closeConnection(conn);
return;
}
}
private void outputBecameAvailable(Connection conn_) {
TCPConnection conn = (TCPConnection) conn_;
handleWritable(conn);
if (conn.hasNetOutput()) {
try {
conn.channel.register(selector, SelectionKey.OP_READ | SelectionKey.OP_WRITE, conn);
} catch (java.nio.channels.ClosedChannelException ex) {
}
}
}
void sendMessage(TCPConnection conn, byte[] raw) {
boolean was_empty = !conn.hasNetOutput();
conn.makeSpaceInAppOutBuffer(raw.length);
// System.out.println("sendMessage: A: position=" + out_buffer.position() + " limit=" +
// conn.out_buffer.limit());
conn.connection_buffers.appOutBuffer().put(raw);
conn.connection_buffers.processAppOutBuffer();
// System.out.println("sendMessage: B: position=" + out_buffer.position() + " limit=" +
// conn.out_buffer.limit());
if (was_empty) outputBecameAvailable(conn);
}
private void processInBuffer(TCPConnection conn) {
ByteBuffer app_in_buffer = conn.connection_buffers.appInBuffer();
logger.log(Level.FINEST, "pre: app_in_buffer.position=" + app_in_buffer.position());
int raw_bytes = app_in_buffer.position();
byte[] raw = new byte[raw_bytes];
app_in_buffer.position(0);
app_in_buffer.get(raw);
app_in_buffer.position(raw_bytes);
int offset = 0;
// System.out.println("processInBuffer():looping");
while (offset < raw.length) {
// System.out.println("processInBuffer(): inside loop offset=" + offset);
int bytes_left = raw.length - offset;
if (bytes_left < 4) break;
int msg_size = Message.decodeSize(raw, offset);
if (bytes_left < msg_size) break;
Message msg = new Message();
Message.decode_status status = msg.decode(raw, offset, msg_size);
// System.out.println("processInBuffer():decoded, status=" + status);
switch (status) {
case decoded:
{
logRawDecodedPacket(raw, offset, msg_size);
offset += msg_size;
boolean b = handleMessage(msg, conn);
if (!b) {
logger.log(Level.FINER, "handle error");
closeConnection(conn);
return;
}
break;
}
case not_enough:
break;
case garbage:
logGarbagePacket(conn, raw, offset, msg_size);
closeConnection(conn, true);
return;
}
if (status == Message.decode_status.not_enough) break;
}
conn.consumeAppInBuffer(offset);
// System.out.println("processInBuffer(): the end");
}
private void run_() throws java.io.IOException {
if (serverChannel != null) {
// set non-blocking mode for the listening socket
serverChannel.configureBlocking(false);
// register the ServerSocketChannel with the Selector
serverChannel.register(selector, SelectionKey.OP_ACCEPT);
}
for (; ; ) {
if (please_stop) {
if (System.currentTimeMillis() >= shutdown_deadline) break;
if (!anyOpenConnections()) break;
}
long timeout = calcNextTimeout();
int n;
// System.out.println("selecting...");
if (timeout != -1) {
long now = System.currentTimeMillis();
if (timeout > now) n = selector.select(timeout - now);
else n = selector.selectNow();
} else n = selector.select();
// System.out.println("Woke up from select()");
// get an iterator over the set of selected keys
Iterator it = selector.selectedKeys().iterator();
// look at each key in the selected set
while (it.hasNext()) {
SelectionKey key = (SelectionKey) it.next();
if (key.isAcceptable()) {
logger.log(Level.FINE, "Got an inbound connection (key is acceptable)");
ServerSocketChannel server = (ServerSocketChannel) key.channel();
SocketChannel channel = server.accept();
InetSocketAddress address =
(InetSocketAddress) channel.socket().getRemoteSocketAddress();
logger.log(Level.INFO, "Got an inbound connection from " + address.toString());
if (!please_stop) {
TCPConnection conn =
new TCPConnection(
TCPNode.this, settings.watchdogInterval(), settings.idleTimeout());
conn.host_id = address.getAddress().getHostAddress();
conn.state = Connection.State.connected_in;
conn.channel = channel;
channel.configureBlocking(false);
channel.register(selector, SelectionKey.OP_READ, conn);
registerInboundConnection(conn);
// Devoteam Configure the CER/CEA sending
boolean autoCERCEAEnable =
Config.getConfigByName("diameter.properties")
.getBoolean("capability.AUTO_CER_CEA_ENABLE", true);
if (!autoCERCEAEnable) {
getNode().sendCER(conn);
}
} else {
// We don't want to add the connection if were are shutting down.
channel.close();
}
} else if (key.isConnectable()) {
logger.log(Level.FINE, "An outbound connection is ready (key is connectable)");
SocketChannel channel = (SocketChannel) key.channel();
TCPConnection conn = (TCPConnection) key.attachment();
try {
if (channel.finishConnect()) {
logger.log(Level.FINEST, "Connected!");
conn.state = Connection.State.connected_out;
channel.register(selector, SelectionKey.OP_READ, conn);
initiateCER(conn);
}
} catch (java.io.IOException ex) {
logger.log(Level.WARNING, "Connection to '" + conn.host_id + "' failed", ex);
try {
channel.register(selector, 0);
channel.close();
} catch (java.io.IOException ex2) {
}
unregisterConnection(conn);
}
} else if (key.isReadable()) {
logger.log(Level.FINEST, "Key is readable");
// System.out.println("key is readable");
SocketChannel channel = (SocketChannel) key.channel();
TCPConnection conn = (TCPConnection) key.attachment();
handleReadable(conn);
if (conn.state != Connection.State.closed && conn.hasNetOutput())
channel.register(selector, SelectionKey.OP_READ | SelectionKey.OP_WRITE, conn);
} else if (key.isWritable()) {
logger.log(Level.FINEST, "Key is writable");
SocketChannel channel = (SocketChannel) key.channel();
TCPConnection conn = (TCPConnection) key.attachment();
synchronized (getLockObject()) {
handleWritable(conn);
if (conn.state != Connection.State.closed && conn.hasNetOutput())
channel.register(selector, SelectionKey.OP_READ | SelectionKey.OP_WRITE, conn);
}
}
// remove key from selected set, it's been handled
it.remove();
}
runTimers();
}
// Remaining connections are close by Node instance
// selector is closed in stop()
}