@Override
protected int doReadMessages(List<Object> buf) throws Exception {
DatagramChannel ch = javaChannel();
DatagramChannelConfig config = config();
RecvByteBufAllocator.Handle allocHandle = unsafe().recvBufAllocHandle();
ByteBuf data = allocHandle.allocate(config.getAllocator());
allocHandle.attemptedBytesRead(data.writableBytes());
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;
}
allocHandle.lastBytesRead(nioData.position() - pos);
buf.add(
new DatagramPacket(
data.writerIndex(data.writerIndex() + allocHandle.lastBytesRead()),
localAddress(),
remoteAddress));
free = false;
return 1;
} catch (Throwable cause) {
PlatformDependent.throwException(cause);
return -1;
} finally {
if (free) {
data.release();
}
}
}
private SSLEngineResult unwrap(
SSLEngine engine, ByteBuf in, int readerIndex, int len, ByteBuf out) throws SSLException {
int nioBufferCount = in.nioBufferCount();
int writerIndex = out.writerIndex();
final SSLEngineResult result;
if (engine instanceof OpenSslEngine && nioBufferCount > 1) {
/**
* If {@link OpenSslEngine} is in use, we can use a special {@link
* OpenSslEngine#unwrap(ByteBuffer[], ByteBuffer[])} method that accepts multiple {@link
* ByteBuffer}s without additional memory copies.
*/
OpenSslEngine opensslEngine = (OpenSslEngine) engine;
try {
singleBuffer[0] = toByteBuffer(out, writerIndex, out.writableBytes());
result = opensslEngine.unwrap(in.nioBuffers(readerIndex, len), singleBuffer);
out.writerIndex(writerIndex + result.bytesProduced());
} finally {
singleBuffer[0] = null;
}
} else {
result =
engine.unwrap(
toByteBuffer(in, readerIndex, len),
toByteBuffer(out, writerIndex, out.writableBytes()));
}
out.writerIndex(writerIndex + result.bytesProduced());
return result;
}
@Override
public ByteBuf translateFrame(ByteBuf readBuffer)
throws LimitExedeedException, InvalidDataException {
while (readBuffer.isReadable()) {
switch (status) {
case STATUS_H:
h = readBuffer.readByte();
status = STATUS_L;
break;
case STATUS_L:
l = readBuffer.readByte();
final int blen =
Protocol.order == ByteOrder.BIG_ENDIAN
? (0x0000ff00 & (h << 8)) | (0x000000ff & l)
: (0x0000ff00 & (l << 8)) | (0x000000ff & h);
if (context != null) {
if (blen <= 0 || blen > maxFrameSize) {
throw new LimitExedeedException("帧长度非法:" + h + "/" + l + ":" + blen);
}
}
incompleteframe = PooledByteBufAllocator.DEFAULT.buffer(blen + 16 + 2);
incompleteframe = incompleteframe.order(Protocol.order);
incompleteframe.writeShort(blen);
status = STATUS_C;
break;
case STATUS_C:
int len = incompleteframe.writableBytes() - 16;
len = len < readBuffer.readableBytes() ? len : readBuffer.readableBytes();
// incompleteframe.writeBytes(readBuffer, len);
if (readBuffer.hasMemoryAddress()) {
PlatformDependent.copyMemory(
readBuffer.memoryAddress() + readBuffer.readerIndex(),
incompleteframe.memoryAddress() + incompleteframe.writerIndex(),
len);
} else if (readBuffer.hasArray()) {
PlatformDependent.copyMemory(
readBuffer.array(),
readBuffer.arrayOffset() + readBuffer.readerIndex(),
incompleteframe.memoryAddress() + incompleteframe.writerIndex(),
len);
}
incompleteframe.writerIndex(incompleteframe.writerIndex() + len);
readBuffer.readerIndex(readBuffer.readerIndex() + len);
if ((incompleteframe.writableBytes() - 16) <= 0) {
status = STATUS_H;
return incompleteframe;
}
break;
}
}
return null;
}
@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 int doReadMessages(MessageBuf<Object> buf) throws Exception {
DatagramChannel ch = javaChannel();
ByteBuf buffer = alloc().directBuffer(config().getReceivePacketSize());
boolean free = true;
try {
ByteBuffer data = buffer.nioBuffer(buffer.writerIndex(), buffer.writableBytes());
InetSocketAddress remoteAddress = (InetSocketAddress) ch.receive(data);
if (remoteAddress == null) {
return 0;
}
buf.add(
new DatagramPacket(
buffer.writerIndex(buffer.writerIndex() + data.remaining()), remoteAddress));
free = false;
return 1;
} catch (Throwable cause) {
if (cause instanceof Error) {
throw (Error) cause;
}
if (cause instanceof RuntimeException) {
throw (RuntimeException) cause;
}
if (cause instanceof Exception) {
throw (Exception) cause;
}
throw new ChannelException(cause);
} finally {
if (free) {
buffer.free();
}
}
}
private boolean handleCompressedFrame(ChannelHandlerContext ctx, ByteBuf in, List<Object> out)
throws Exception {
if (!in.isReadable(FRAME_COMPRESS_HEADER_LENGTH)) {
return false;
}
int compressedPayloadLength = in.readInt();
if (!in.isReadable(compressedPayloadLength)) {
return false;
}
// decompress payload
Inflater inflater = new Inflater();
if (in.hasArray()) {
inflater.setInput(in.array(), in.arrayOffset() + in.readerIndex(), compressedPayloadLength);
in.skipBytes(compressedPayloadLength);
} else {
byte[] array = new byte[compressedPayloadLength];
in.readBytes(array);
inflater.setInput(array);
}
while (!inflater.finished()) {
ByteBuf decompressed = ctx.alloc().heapBuffer(1024, 1024);
byte[] outArray = decompressed.array();
int count =
inflater.inflate(outArray, decompressed.arrayOffset(), decompressed.writableBytes());
decompressed.writerIndex(count);
// put data in the pipeline
out.add(decompressed);
}
return true;
}
private void testBuffer(ByteBuf buf, boolean isDirect) {
assertEquals(11, buf.capacity());
assertEquals(isDirect, buf.isDirect());
assertEquals(0, buf.readableBytes());
assertEquals(11, buf.writableBytes());
}
private void writeBuffer(byte[] data) {
int newSize = 0;
int oldSize = buffer.capacity();
int length = data.length;
if (buffer.writableBytes() <= length) {
if (length > oldSize) {
newSize = length * 2;
} else {
newSize = 2 * oldSize;
}
buffer.capacity(newSize);
}
buffer.writeBytes(data);
}
private static SSLEngineResult wrap(SSLEngine engine, ByteBuf in, ByteBuf out)
throws SSLException {
ByteBuffer in0 = in.nioBuffer();
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());
if (result.getStatus() == Status.BUFFER_OVERFLOW) {
out.ensureWritableBytes(engine.getSession().getPacketBufferSize());
} else {
return result;
}
}
}
/** 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;
}
private static SSLEngineResult unwrap(SSLEngine engine, ByteBuf in, ByteBuf out)
throws SSLException {
ByteBuffer in0 = in.nioBuffer();
for (; ; ) {
ByteBuffer out0 = out.nioBuffer(out.writerIndex(), out.writableBytes());
SSLEngineResult result = engine.unwrap(in0, out0);
in.skipBytes(result.bytesConsumed());
out.writerIndex(out.writerIndex() + result.bytesProduced());
switch (result.getStatus()) {
case BUFFER_OVERFLOW:
out.ensureWritableBytes(engine.getSession().getApplicationBufferSize());
break;
default:
return result;
}
}
}
@Override
public void handleEvent(ConduitStreamSourceChannel channel) {
final ChannelConfig config = config();
final ChannelPipeline pipeline = pipeline();
final ByteBufAllocator allocator = config.getAllocator();
final int maxMessagesPerRead = config.getMaxMessagesPerRead();
RecvByteBufAllocator.Handle allocHandle = this.allocHandle;
if (allocHandle == null) {
this.allocHandle = allocHandle = config.getRecvByteBufAllocator().newHandle();
}
if (!config.isAutoRead()) {
removeReadOp(channel);
}
ByteBuf byteBuf = null;
int messages = 0;
boolean close = false;
try {
do {
byteBuf = allocHandle.allocate(allocator);
int localReadAmount = byteBuf.writeBytes(channel, byteBuf.writableBytes());
if (localReadAmount <= 0) {
// not was read release the buffer
byteBuf.release();
close = localReadAmount < 0;
break;
}
pipeline.fireChannelRead(byteBuf);
byteBuf = null;
allocHandle.record(localReadAmount);
} while (++messages < maxMessagesPerRead);
pipeline.fireChannelReadComplete();
if (close) {
closeOnRead();
close = false;
}
} catch (Throwable t) {
handleReadException(pipeline, byteBuf, t, close);
}
}
private static SSLEngineResult unwrap(SSLEngine engine, ByteBuffer in, ByteBuf out)
throws SSLException {
int overflows = 0;
for (; ; ) {
ByteBuffer out0 = out.nioBuffer(out.writerIndex(), out.writableBytes());
SSLEngineResult result = engine.unwrap(in, out0);
out.writerIndex(out.writerIndex() + result.bytesProduced());
switch (result.getStatus()) {
case BUFFER_OVERFLOW:
int max = engine.getSession().getApplicationBufferSize();
switch (overflows++) {
case 0:
out.ensureWritable(Math.min(max, in.remaining()));
break;
default:
out.ensureWritable(max);
}
break;
default:
return result;
}
}
}
@Override
protected void encode(ChannelHandlerContext ctx, Object msg, List<Object> out) throws Exception {
ByteBuf buf = null;
if (msg instanceof HttpMessage) {
if (state != ST_INIT) {
throw new IllegalStateException(
"unexpected message type: " + StringUtil.simpleClassName(msg));
}
@SuppressWarnings({"unchecked", "CastConflictsWithInstanceof"})
H m = (H) msg;
buf = ctx.alloc().buffer();
// Encode the message.
encodeInitialLine(buf, m);
HttpHeaders.encode(m.headers(), buf);
buf.writeBytes(CRLF);
state = HttpHeaders.isTransferEncodingChunked(m) ? ST_CONTENT_CHUNK : ST_CONTENT_NON_CHUNK;
}
if (msg instanceof HttpContent || msg instanceof ByteBuf || msg instanceof FileRegion) {
if (state == ST_INIT) {
throw new IllegalStateException(
"unexpected message type: " + StringUtil.simpleClassName(msg));
}
int contentLength = contentLength(msg);
if (state == ST_CONTENT_NON_CHUNK) {
if (contentLength > 0) {
if (buf != null && buf.writableBytes() >= contentLength && msg instanceof HttpContent) {
// merge into other buffer for performance reasons
buf.writeBytes(((HttpContent) msg).content());
out.add(buf);
} else {
if (buf != null) {
out.add(buf);
}
out.add(encodeAndRetain(msg));
}
} else {
if (buf != null) {
out.add(buf);
} else {
// Need to produce some output otherwise an
// IllegalStateException will be thrown
out.add(EMPTY_BUFFER);
}
}
if (msg instanceof LastHttpContent) {
state = ST_INIT;
}
} else if (state == ST_CONTENT_CHUNK) {
if (buf != null) {
out.add(buf);
}
encodeChunkedContent(ctx, msg, contentLength, out);
} else {
throw new Error();
}
} else {
if (buf != null) {
out.add(buf);
}
}
}
@Override
void epollInReady() {
final ChannelConfig config = config();
final ChannelPipeline pipeline = pipeline();
final ByteBufAllocator allocator = config.getAllocator();
RecvByteBufAllocator.Handle allocHandle = this.allocHandle;
if (allocHandle == null) {
this.allocHandle = allocHandle = config.getRecvByteBufAllocator().newHandle();
}
ByteBuf byteBuf = null;
boolean close = false;
try {
int byteBufCapacity = allocHandle.guess();
int totalReadAmount = 0;
for (; ; ) {
// we use a direct buffer here as the native implementations only be able
// to handle direct buffers.
byteBuf = allocator.directBuffer(byteBufCapacity);
int writable = byteBuf.writableBytes();
int localReadAmount = doReadBytes(byteBuf);
if (localReadAmount <= 0) {
// not was read release the buffer
byteBuf.release();
close = localReadAmount < 0;
break;
}
readPending = false;
pipeline.fireChannelRead(byteBuf);
byteBuf = null;
if (totalReadAmount >= Integer.MAX_VALUE - localReadAmount) {
allocHandle.record(totalReadAmount);
// Avoid overflow.
totalReadAmount = localReadAmount;
} else {
totalReadAmount += localReadAmount;
}
if (localReadAmount < writable) {
// Read less than what the buffer can hold,
// which might mean we drained the recv buffer completely.
break;
}
}
pipeline.fireChannelReadComplete();
allocHandle.record(totalReadAmount);
if (close) {
closeOnRead(pipeline);
close = false;
}
} catch (Throwable t) {
boolean closed = handleReadException(pipeline, byteBuf, t, close);
if (!closed) {
// trigger a read again as there may be something left to read and because of epoll ET we
// will not get notified again until we read everything from the socket
eventLoop()
.execute(
new Runnable() {
@Override
public void run() {
epollInReady();
}
});
}
} finally {
// Check if there is a readPending which was not processed yet.
// This could be for two reasons:
// * The user called Channel.read() or ChannelHandlerContext.read() in channelRead(...)
// method
// * The user called Channel.read() or ChannelHandlerContext.read() in
// channelReadComplete(...) method
//
// See https://github.com/netty/netty/issues/2254
if (!config.isAutoRead() && !readPending) {
clearEpollIn0();
}
}
}
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();
}
}
}
@Override
protected int doReadBytes(ByteBuf byteBuf) throws Exception {
// 从channel中读出数据到buffer
return byteBuf.writeBytes(javaChannel(), byteBuf.writableBytes());
}
@Override
public int writableBytes() {
return buf.writableBytes();
}