CCats/daemon/include/CovertChannel/ProxyChannel.h

#ifndef PROXYCHANNEL_H
#define PROXYCHANNEL_H

#include "CovertChannel.h"

/**
 * @class ForwardChannel
 *
 * A CovertChannel which forwards the traffic it captures.
 */
class ProxyChannel : public CovertChannel {
public:
	/**
	 * Sets up a CovertChannel.
	 *
	 * Creates a CovertChannel, sets the network interfaces for sniffing and sending and sets the filter.
	 *
	 * @param innerInterface name of the interface of the inner network
	 * @param outerInterface name of the interface of the outer network
	 * @param filter pcap filter string which will be set for the channel sniffers and negated for the forward sniffers
	 * @param relayOnly true - server only relays traffic | false - server redirects traffic over another relay
	 */
	ProxyChannel(const std::string &innerInterface, const std::string &outerInterface, const std::string &ownIP, const std::string &partnerIP,
	             const std::string &filterIP, const std::string &filterPort, const bool relayOnly);

	/**
	 * Destroys the CovertChannel.
	 */
	virtual ~ProxyChannel();

protected:
	/**
	 * Handler for sniffed packets filterd to forward from the outer network.
	 *
	 * Handles incoming packets and forwards them.
	 *
	 * @param pdu sniffed packet
	 *
	 * @return false = stop loop | true = continue loop
	 */
	virtual bool handleChannelFromOuter(Tins::PDU &pdu);

	/**
	 * Handler for sniffed packets filterd to forward from the inner network.
	 *
	 * Handles incoming packets and forwards them.
	 *
	 * @param pdu sniffed packet
	 *
	 * @return false = stop loop | true = continue loop
	 */
	virtual bool handleChannelFromInner(Tins::PDU &pdu);

	/**
	 * Handler for sniffed packets filterd to use as channel from the outer network.
	 *
	 * Handles incoming packets and redirets them.
	 *
	 * @param pdu sniffed packet
	 *
	 * @return false = stop loop | true = continue loop
	 */
	virtual bool handlePartnerFromOuter(Tins::PDU &pdu);

	/**
	 * Relay option which activates relay only mode
	 */
	const bool relayOnly;

	const Tins::IPv4Address ownAddress;
	const Tins::IPv4Address partnerAddress;
	const Tins::IPv4Address filterAddress;
};

#endif