private void parse(QpidByteBuffer buffer) {
buffer.mark();
switch (_state) {
case PROTO_HDR:
if (buffer.remaining() < 8) {
break;
}
if (buffer.get() != 'A'
|| buffer.get() != 'M'
|| buffer.get() != 'Q'
|| buffer.get() != 'P') {
buffer.reset();
error("bad protocol header: %s", str(buffer));
_state = ERROR;
} else {
byte protoClass = buffer.get();
byte instance = buffer.get();
byte major = buffer.get();
byte minor = buffer.get();
_serverAssembler.init(new ProtocolHeader(protoClass, instance, major, minor));
_state = FRAME_HDR;
}
break;
case FRAME_HDR:
if (buffer.remaining() < ServerFrame.HEADER_SIZE) {
buffer.reset();
} else {
flags = buffer.get();
type = SegmentType.get(buffer.get());
int size = (0xFFFF & buffer.getShort());
size -= ServerFrame.HEADER_SIZE;
if (size < 0 || size > (_maxFrameSize - ServerFrame.HEADER_SIZE)) {
error("bad frame size: %d", size);
_state = ERROR;
} else {
buffer.get(); // skip unused byte
byte b = buffer.get();
if ((b & 0xF0) != 0) {
error("non-zero reserved bits in upper nibble of " + "frame header byte 5: '%x'", b);
_state = ERROR;
} else {
track = (byte) (b & 0xF);
channel = (0xFFFF & buffer.getShort());
buffer.position(buffer.position() + 4);
if (size == 0) {
ServerFrame frame =
new ServerFrame(flags, type, track, channel, EMPTY_BYTE_BUFFER.duplicate());
_serverAssembler.received(frame);
} else if (buffer.remaining() < size) {
buffer.reset();
} else {
final QpidByteBuffer body = buffer.slice();
body.limit(size);
ServerFrame frame = new ServerFrame(flags, type, track, channel, body);
buffer.position(buffer.position() + size);
_serverAssembler.received(frame);
}
}
}
}
break;
default:
throw new IllegalStateException();
}
}
public void closed() {
_serverAssembler.closed();
}
private void error(String fmt, Object... args) {
_serverAssembler.error(new ProtocolError(ServerFrame.L1, fmt, args));
}
public void exception(Throwable t) {
_serverAssembler.exception(t);
}