import com.subgraph.orchid.circuits.cells.CellImpl; //导入依赖的package包/类
public RelayCell receiveRelayResponse(int expectedCommand, Router extendTarget) {
	final RelayCell cell = circuit.receiveRelayCell();
	if(cell == null) {
		throw new TorException("Timeout building circuit");
	}
	final int command = cell.getRelayCommand();
	if(command == RelayCell.RELAY_TRUNCATED) {
		final int code = cell.getByte() & 0xFF;
		final String msg = CellImpl.errorToDescription(code);
		final String source = nodeToName(cell.getCircuitNode());
		if(code == Cell.ERROR_PROTOCOL) {
			logProtocolViolation(source, extendTarget);
		}
		throw new TorException("Error from ("+ source +") while extending to ("+ extendTarget.getNickname() + "): "+ msg);
	} else if(command != expectedCommand) {
		final String expected = RelayCellImpl.commandToDescription(expectedCommand);
		final String received = RelayCellImpl.commandToDescription(command);
		throw new TorException("Received incorrect extend response, expecting "+ expected + " but received "+ received);
	} else {
		return cell;
	}
}
 

import com.subgraph.orchid.circuits.cells.CellImpl; //导入依赖的package包/类
protected  void sendVersions(int... versions) throws ConnectionIOException {
	final Cell cell = CellImpl.createVarCell(0, Cell.VERSIONS, versions.length * 2);
	for(int v: versions) {
		cell.putShort(v);
	}
	connection.sendCell(cell);
}
 

import com.subgraph.orchid.circuits.cells.CellImpl; //导入依赖的package包/类
protected void sendNetinfo() throws ConnectionIOException {
	final Cell cell = CellImpl.createCell(0, Cell.NETINFO);
	putTimestamp(cell);
	putIPv4Address(cell, connection.getRouter().getAddress());
	putMyAddresses(cell);
	connection.sendCell(cell);
}
 

import com.subgraph.orchid.circuits.cells.CellImpl; //导入依赖的package包/类
void sendDestroyCell(int reason) {
	Cell destroy = CellImpl.createCell(circuitId, Cell.DESTROY);
	destroy.putByte(reason);
	try {
		connection.sendCell(destroy);
	} catch (ConnectionIOException e) {
		logger.warning("Connection IO error sending DESTROY cell: "+ e.getMessage());
	}
}
 

import com.subgraph.orchid.circuits.cells.CellImpl; //导入依赖的package包/类
private void sendCreateFastCell(TorCreateFastKeyAgreement kex) {
	final Cell cell = CellImpl.createCell(circuit.getCircuitId(), Cell.CREATE_FAST);
	cell.putByteArray(kex.createOnionSkin());
	circuit.sendCell(cell);
}
 

import com.subgraph.orchid.circuits.cells.CellImpl; //导入依赖的package包/类
private void processDestroyCell(int reason) {
	logger.fine("DESTROY cell received ("+ CellImpl.errorToDescription(reason) +") on "+ circuit);
	destroyCircuit();
}