#ifndef PCAPPP_PCAP_REMOTE_DEVICE
#define PCAPPP_PCAP_REMOTE_DEVICE

#if defined(_WIN32)

#include <vector>
#include "PcapLiveDevice.h"


/// @file

struct pcap_rmtauth;

/**
* \namespace pcpp
* \brief The main namespace for the PcapPlusPlus lib
*/
namespace pcpp
{

	/**
	 * @struct PcapRemoteAuthentication
	 * The remote daemon (rpcapd) can be configured to require authentication before allowing a client to connect. This is done for
	 * security reasons of course. This struct wraps the WinPcap/Npcap authentication object (pcap_rmtauth) and can (but not must) be given to
	 * PcapRemoteDeviceList when initiating a connection to the remote daemon
	 */
	struct PcapRemoteAuthentication
	{
	public:
		/**
		 * A constructor that sets username and password
		 * @param[in] username The username for authentication with the remote daemon
		 * @param[in] password The password for authentication with the remote daemon
		 */
		PcapRemoteAuthentication(const std::string &username, const std::string &password) : userName(username) { this->password = password; }

		/**
		 * A copy c'tor for this object
		 * @param[in] other The object to copy from
		 */
		PcapRemoteAuthentication(const PcapRemoteAuthentication& other) : userName(other.userName), password(other.password) {}

		/**
		 * The username for authentication
		 */
		std::string userName;

		/**
		 * The password for authentication
		 */
		std::string password;

		/**
		 * A conversion method from PcapRemoteAuthentication to pcap_rmtauth. Note: the char* pointers of the returned pcap_rmtauth points
		 * to the same places in memory as PcapRemoteAuthentication::userName and PcapRemoteAuthentication::password so the user should avoid
		 * freeing this memory
		 * @return A pcap_rmtauth that is converted from this class
		 */
		pcap_rmtauth getPcapRmAuth() const;
	};

	/**
	 * @class PcapRemoteDevice
	 * A class that provides a C++ wrapper for WinPcap/Npcap Remote Capture feature. This feature allows to interact to a remote machine and capture
	 * packets that are being transmitted on the remote network interfaces. This requires a remote daemon (called rpcapd) which performs the
	 * capture and sends data back and the local client (represented by PcapRemoteDevice) that sends the appropriate commands and receives the
	 * captured data. You can read more about this feature in WinPcap Remote Capture manual: https://www.winpcap.org/docs/docs_412/html/group__remote.html<BR>
	 * Since this feature is supported in WinPcap and Npcap only and not in libpcap, PcapRemoteDevice can only be used in Windows only.<BR>
	 * This class provides a wrapper for the local client, meaning it assumes the daemon (rpcapd) is already running on the remote machine and it
	 * tries to connect to it and start receiving/sending packets from/to it. This class assumes rpcapd is in passive mode, meaning
	 * PcapRemoteDevice connects to the remote daemon, sends the appropriate commands to it, and starts capturing packets, rather than letting the
	 * daemon connect to the client by itself. Using PcapRemoteDevice is very similar to using the other live devices (PcapLiveDevice or
	 * WinPcapLiveDevice), meaning the API's are the same and the same logic is used (for example: capturing is done on a different thread,
	 * sending packets are done on the same thread, etc.). For the full API and explanations, please refer to PcapLiveDevice. The reason for the
	 * similar API is that WinPcap/Npcap's API is very similar between Remote Capture and local network interface capture. The things that are different
	 * are some are some implementation details, mainly in making the connection to the remote daemon, and the way the user can get the instance
	 * of PcapRemoteDevice. For more details on that please refer to PcapRemoteDeviceList
	 */
	class PcapRemoteDevice : public PcapLiveDevice
	{
		friend class PcapRemoteDeviceList;
	private:
		IPAddress m_RemoteMachineIpAddress;
		uint16_t m_RemoteMachinePort;
		PcapRemoteAuthentication* m_RemoteAuthentication;

		// c'tor is private, as only PcapRemoteDeviceList should create instances of it, and it'll create only one for every remote interface
		PcapRemoteDevice(pcap_if_t* iface, PcapRemoteAuthentication* remoteAuthentication, const IPAddress& remoteMachineIP, uint16_t remoteMachinePort);

		// private copy c'tor
		PcapRemoteDevice( const PcapRemoteDevice& other );
		// private assignment operator
		PcapRemoteDevice& operator=(const PcapRemoteDevice& other);

		static void* remoteDeviceCaptureThreadMain(void *ptr);

		//overridden methods
		ThreadStart getCaptureThreadStart();

	public:
		virtual ~PcapRemoteDevice() {}

		/**
		 * @return The IP address of the remote machine where packets are transmitted from the remote machine to the client machine
		 */
		IPAddress getRemoteMachineIpAddress() const { return m_RemoteMachineIpAddress; }

		/**
		 * @return The port of the remote machine where packets are transmitted from the remote machine to the client machine
		 */
		uint16_t getRemoteMachinePort() const { return m_RemoteMachinePort; }

		//overridden methods

		virtual LiveDeviceType getDeviceType() const { return RemoteDevice; }

		/**
		 * MTU isn't supported for remote devices
		 * @return 0
		 */
		virtual uint32_t getMtu() const;

		/**
		 * MAC address isn't supported for remote devices
		 * @return MacAddress#Zero
		 */
		virtual MacAddress getMacAddress() const;

		/**
		 * Open the device using pcap_open. Opening the device makes the connection to the remote daemon (including authentication if needed
		 * and provided). If this methods succeeds it means the connection to the remote daemon succeeded and the device is ready for use.
		 * As in PcapLiveDevice, packet capturing won't start yet. For packet capturing the user should call startCapture(). This implies
		 * that calling this method is a must before calling startCapture() (otherwise startCapture() will fail with a "device not open" error).
		 * The remote daemon is asked to capture packets in promiscuous mode
		 * @return True if the device was opened successfully, false otherwise. When opening the device fails an error will be printed to log
		 * as well, including the WinPcap/Npcap error if exists
		 */
		virtual bool open();

		virtual void getStatistics(IPcapDevice::PcapStats& stats) const;
	};

} // namespace pcpp

#endif // _WIN32

#endif /* PCAPPP_PCAP_REMOTE_DEVICE */