@Override
protected boolean doWriteMessage(Object msg, ChannelOutboundBuffer in) throws Exception {
SctpMessage packet = (SctpMessage) msg;
ByteBuf data = packet.content();
int dataLen = data.readableBytes();
if (dataLen == 0) {
return true;
}
ByteBufAllocator alloc = alloc();
boolean needsCopy = data.nioBufferCount() != 1;
if (!needsCopy) {
if (!data.isDirect() && alloc.isDirectBufferPooled()) {
needsCopy = true;
}
}
ByteBuffer nioData;
if (!needsCopy) {
nioData = data.nioBuffer();
} else {
data = alloc.directBuffer(dataLen).writeBytes(data);
nioData = data.nioBuffer();
}
final MessageInfo mi =
MessageInfo.createOutgoing(association(), null, packet.streamIdentifier());
mi.payloadProtocolID(packet.protocolIdentifier());
mi.streamNumber(packet.streamIdentifier());
mi.unordered(packet.isUnordered());
final int writtenBytes = javaChannel().send(nioData, mi);
return writtenBytes > 0;
}
@Override
public long transferTo(SctpChannel ch) throws IOException {
final MessageInfo messageInfo = MessageInfo.createOutgoing(ch.association(), null, streamNo);
messageInfo.payloadProtocolID(protocolId);
messageInfo.streamNumber(streamNo);
ch.send(buffer, messageInfo);
return writtenBytes();
}
/**
* Essential data that is being carried within SCTP Data Chunk
*
* @param msgInfo the {@link MessageInfo}
* @param payloadBuffer channel buffer
*/
public SctpMessage(MessageInfo msgInfo, ByteBuf payloadBuffer) {
super(payloadBuffer);
if (msgInfo == null) {
throw new NullPointerException("msgInfo");
}
this.msgInfo = msgInfo;
streamIdentifier = msgInfo.streamNumber();
protocolIdentifier = msgInfo.payloadProtocolID();
unordered = msgInfo.isUnordered();
}