@Override
protected int doReadMessages(List<Object> buf) throws Exception {
DatagramChannel ch = javaChannel();
DatagramChannelConfig config = config();
RecvByteBufAllocator.Handle allocHandle = this.allocHandle;
if (allocHandle == null) {
this.allocHandle = allocHandle = config.getRecvByteBufAllocator().newHandle();
}
ByteBuf data = allocHandle.allocate(config.getAllocator());
boolean free = true;
try {
ByteBuffer nioData = data.internalNioBuffer(data.writerIndex(), data.writableBytes());
int pos = nioData.position();
InetSocketAddress remoteAddress = (InetSocketAddress) ch.receive(nioData);
if (remoteAddress == null) {
return 0;
}
int readBytes = nioData.position() - pos;
data.writerIndex(data.writerIndex() + readBytes);
allocHandle.record(readBytes);
buf.add(new DatagramPacket(data, localAddress(), remoteAddress));
free = false;
return 1;
} catch (Throwable cause) {
PlatformDependent.throwException(cause);
return -1;
} finally {
if (free) {
data.release();
}
}
}
@Override
protected int doReadMessages(List<Object> buf) throws Exception {
SctpChannel ch = javaChannel();
RecvByteBufAllocator.Handle allocHandle = unsafe().recvBufAllocHandle();
ByteBuf buffer = allocHandle.allocate(config().getAllocator());
boolean free = true;
try {
ByteBuffer data = buffer.internalNioBuffer(buffer.writerIndex(), buffer.writableBytes());
int pos = data.position();
MessageInfo messageInfo = ch.receive(data, null, notificationHandler);
if (messageInfo == null) {
return 0;
}
buf.add(
new SctpMessage(
messageInfo, buffer.writerIndex(buffer.writerIndex() + data.position() - pos)));
free = false;
return 1;
} catch (Throwable cause) {
PlatformDependent.throwException(cause);
return -1;
} finally {
int bytesRead = buffer.readableBytes();
allocHandle.record(bytesRead);
if (free) {
buffer.release();
}
}
}
@Override
protected boolean doWriteMessage(Object msg, ChannelOutboundBuffer in) throws Exception {
final SocketAddress remoteAddress;
final ByteBuf data;
if (msg instanceof AddressedEnvelope) {
@SuppressWarnings("unchecked")
AddressedEnvelope<ByteBuf, SocketAddress> envelope =
(AddressedEnvelope<ByteBuf, SocketAddress>) msg;
remoteAddress = envelope.recipient();
data = envelope.content();
} else {
data = (ByteBuf) msg;
remoteAddress = null;
}
final int dataLen = data.readableBytes();
if (dataLen == 0) {
return true;
}
final ByteBuffer nioData = data.internalNioBuffer(data.readerIndex(), dataLen);
final int writtenBytes;
if (remoteAddress != null) {
writtenBytes = javaChannel().send(nioData, remoteAddress);
} else {
writtenBytes = javaChannel().write(nioData);
}
return writtenBytes > 0;
}
/** Read bytes into the given {@link ByteBuf} and return the amount. */
private int doReadBytes(ByteBuf byteBuf) throws Exception {
int writerIndex = byteBuf.writerIndex();
int localReadAmount;
if (byteBuf.hasMemoryAddress()) {
localReadAmount =
Native.readAddress(fd, byteBuf.memoryAddress(), writerIndex, byteBuf.capacity());
} else {
ByteBuffer buf = byteBuf.internalNioBuffer(writerIndex, byteBuf.writableBytes());
localReadAmount = Native.read(fd, buf, buf.position(), buf.limit());
}
if (localReadAmount > 0) {
byteBuf.writerIndex(writerIndex + localReadAmount);
}
return localReadAmount;
}
/**
* Write bytes form the given {@link ByteBuf} to the underlying {@link java.nio.channels.Channel}.
*
* @param buf the {@link ByteBuf} from which the bytes should be written
* @return amount the amount of written bytes
*/
private int doWriteBytes(ByteBuf buf, int readable) throws Exception {
int readerIndex = buf.readerIndex();
int localFlushedAmount;
if (buf.nioBufferCount() == 1) {
if (buf.hasMemoryAddress()) {
localFlushedAmount =
Native.writeAddress(fd, buf.memoryAddress(), readerIndex, buf.writerIndex());
} else {
ByteBuffer nioBuf = buf.internalNioBuffer(readerIndex, readable);
localFlushedAmount = Native.write(fd, nioBuf, nioBuf.position(), nioBuf.limit());
}
} else {
// backed by more then one buffer, do a gathering write...
ByteBuffer[] nioBufs = buf.nioBuffers();
localFlushedAmount = (int) Native.writev(fd, nioBufs, 0, nioBufs.length);
}
if (localFlushedAmount > 0) {
buf.readerIndex(readerIndex + localFlushedAmount);
}
return localFlushedAmount;
}
private SSLEngineResult wrap(ByteBufAllocator alloc, SSLEngine engine, ByteBuf in, ByteBuf out)
throws SSLException {
ByteBuf newDirectIn = null;
try {
int readerIndex = in.readerIndex();
int readableBytes = in.readableBytes();
// We will call SslEngine.wrap(ByteBuffer[], ByteBuffer) to allow efficient handling of
// CompositeByteBuf without force an extra memory copy when CompositeByteBuffer.nioBuffer() is
// called.
final ByteBuffer[] in0;
if (in.isDirect() || !wantsDirectBuffer) {
// As CompositeByteBuf.nioBufferCount() can be expensive (as it needs to check all composed
// ByteBuf
// to calculate the count) we will just assume a CompositeByteBuf contains more then 1
// ByteBuf.
// The worst that can happen is that we allocate an extra ByteBuffer[] in
// CompositeByteBuf.nioBuffers()
// which is better then walking the composed ByteBuf in most cases.
if (!(in instanceof CompositeByteBuf) && in.nioBufferCount() == 1) {
in0 = singleBuffer;
// We know its only backed by 1 ByteBuffer so use internalNioBuffer to keep object
// allocation
// to a minimum.
in0[0] = in.internalNioBuffer(readerIndex, readableBytes);
} else {
in0 = in.nioBuffers();
}
} else {
// We could even go further here and check if its a CompositeByteBuf and if so try to
// decompose it and
// only replace the ByteBuffer that are not direct. At the moment we just will replace the
// whole
// CompositeByteBuf to keep the complexity to a minimum
newDirectIn = alloc.directBuffer(readableBytes);
newDirectIn.writeBytes(in, readerIndex, readableBytes);
in0 = singleBuffer;
in0[0] = newDirectIn.internalNioBuffer(0, readableBytes);
}
for (; ; ) {
ByteBuffer out0 = out.nioBuffer(out.writerIndex(), out.writableBytes());
SSLEngineResult result = engine.wrap(in0, out0);
in.skipBytes(result.bytesConsumed());
out.writerIndex(out.writerIndex() + result.bytesProduced());
switch (result.getStatus()) {
case BUFFER_OVERFLOW:
out.ensureWritable(maxPacketBufferSize);
break;
default:
return result;
}
}
} finally {
// Null out to allow GC of ByteBuffer
singleBuffer[0] = null;
if (newDirectIn != null) {
newDirectIn.release();
}
}
}
private static ByteBuffer toByteBuffer(ByteBuf out, int index, int len) {
return out.nioBufferCount() == 1
? out.internalNioBuffer(index, len)
: out.nioBuffer(index, len);
}
@Override
public ByteBuffer internalNioBuffer(int var1, int var2) {
return a.internalNioBuffer(var1, var2);
}