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NetworkSocket.h
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NetworkSocket.h
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//
// Created by Grishka on 29.03.17.
//
#ifndef LIBTGVOIP_NETWORKSOCKET_H
#define LIBTGVOIP_NETWORKSOCKET_H
#include <stdint.h>
#include <string>
#include <vector>
#include <memory>
#include <atomic>
#include "utils.h"
#include "Buffers.h"
namespace tgvoip {
enum class NetworkProtocol{
UDP=0,
TCP
};
struct TCPO2State{
unsigned char key[32];
unsigned char iv[16];
unsigned char ecount[16];
uint32_t num;
};
class NetworkAddress{
public:
virtual std::string ToString() const;
bool operator==(const NetworkAddress& other) const;
bool operator!=(const NetworkAddress& other) const;
virtual ~NetworkAddress()=default;
virtual bool IsEmpty() const;
virtual bool PrefixMatches(const unsigned int prefix, const NetworkAddress& other) const;
static NetworkAddress Empty();
static NetworkAddress IPv4(std::string str);
static NetworkAddress IPv4(uint32_t addr);
static NetworkAddress IPv6(std::string str);
static NetworkAddress IPv6(const uint8_t addr[16]);
bool isIPv6=false;
union{
uint32_t ipv4;
uint8_t ipv6[16];
} addr;
private:
NetworkAddress(){};
};
struct NetworkPacket{
TGVOIP_MOVE_ONLY(NetworkPacket);
Buffer data;
NetworkAddress address;
uint16_t port;
NetworkProtocol protocol;
static NetworkPacket Empty(){
return NetworkPacket{Buffer(), NetworkAddress::Empty(), 0, NetworkProtocol::UDP};
}
bool IsEmpty(){
return data.IsEmpty() || (protocol==NetworkProtocol::UDP && (port==0 || address.IsEmpty()));
}
};
class SocketSelectCanceller{
public:
virtual ~SocketSelectCanceller();
virtual void CancelSelect()=0;
static SocketSelectCanceller* Create();
};
class NetworkSocket{
public:
friend class NetworkSocketPosix;
friend class NetworkSocketWinsock;
TGVOIP_DISALLOW_COPY_AND_ASSIGN(NetworkSocket);
NetworkSocket(NetworkProtocol protocol);
virtual ~NetworkSocket();
virtual void Send(NetworkPacket packet)=0;
virtual NetworkPacket Receive(size_t maxLen=0)=0;
size_t Receive(unsigned char* buffer, size_t len);
virtual void Open()=0;
virtual void Close()=0;
virtual uint16_t GetLocalPort(){ return 0; };
virtual void Connect(const NetworkAddress address, uint16_t port)=0;
virtual std::string GetLocalInterfaceInfo(NetworkAddress* inet4addr, NetworkAddress* inet6addr);
virtual void OnActiveInterfaceChanged(){};
virtual NetworkAddress GetConnectedAddress(){ return NetworkAddress::Empty(); };
virtual uint16_t GetConnectedPort(){ return 0; };
virtual void SetTimeouts(int sendTimeout, int recvTimeout){};
virtual bool IsFailed();
virtual bool IsReadyToSend(){
return readyToSend;
}
virtual bool OnReadyToSend(){ readyToSend=true; return true; };
virtual bool OnReadyToReceive(){ return true; };
void SetTimeout(double timeout){
this->timeout=timeout;
};
static NetworkSocket* Create(NetworkProtocol protocol);
static NetworkAddress ResolveDomainName(std::string name);
static bool Select(std::vector<NetworkSocket*>& readFds, std::vector<NetworkSocket*>& writeFds, std::vector<NetworkSocket*>& errorFds, SocketSelectCanceller* canceller);
protected:
virtual uint16_t GenerateLocalPort();
virtual void SetMaxPriority();
static void GenerateTCPO2States(unsigned char* buffer, TCPO2State* recvState, TCPO2State* sendState);
static void EncryptForTCPO2(unsigned char* buffer, size_t len, TCPO2State* state);
double ipv6Timeout;
unsigned char nat64Prefix[12];
std::atomic<bool> failed;
bool readyToSend=false;
double lastSuccessfulOperationTime=0.0;
double timeout=0.0;
NetworkProtocol protocol;
};
class NetworkSocketWrapper : public NetworkSocket{
public:
NetworkSocketWrapper(NetworkProtocol protocol) : NetworkSocket(protocol){};
virtual ~NetworkSocketWrapper(){};
virtual NetworkSocket* GetWrapped()=0;
virtual void InitConnection()=0;
virtual void SetNonBlocking(bool){};
};
class NetworkSocketTCPObfuscated : public NetworkSocketWrapper{
public:
NetworkSocketTCPObfuscated(NetworkSocket* wrapped);
virtual ~NetworkSocketTCPObfuscated();
virtual NetworkSocket* GetWrapped();
virtual void InitConnection();
virtual void Send(NetworkPacket packet) override;
virtual NetworkPacket Receive(size_t maxLen) override;
virtual void Open();
virtual void Close();
virtual void Connect(const NetworkAddress address, uint16_t port);
virtual bool OnReadyToSend();
virtual bool IsFailed();
virtual bool IsReadyToSend(){
return readyToSend && wrapped->IsReadyToSend();
};
private:
NetworkSocket* wrapped;
TCPO2State recvState;
TCPO2State sendState;
bool initialized=false;
};
class NetworkSocketSOCKS5Proxy : public NetworkSocketWrapper{
public:
NetworkSocketSOCKS5Proxy(NetworkSocket* tcp, NetworkSocket* udp, std::string username, std::string password);
virtual ~NetworkSocketSOCKS5Proxy();
virtual void Send(NetworkPacket packet) override;
virtual NetworkPacket Receive(size_t maxLen) override;
virtual void Open() override;
virtual void Close();
virtual void Connect(const NetworkAddress address, uint16_t port);
virtual NetworkSocket *GetWrapped();
virtual void InitConnection();
virtual bool IsFailed();
virtual NetworkAddress GetConnectedAddress();
virtual uint16_t GetConnectedPort();
virtual bool OnReadyToSend();
virtual bool OnReadyToReceive();
bool NeedSelectForSending();
private:
void SendConnectionCommand();
enum ConnectionState{
Initial,
WaitingForAuthMethod,
WaitingForAuthResult,
WaitingForCommandResult,
Connected
};
NetworkSocket* tcp;
NetworkSocket* udp;
std::string username;
std::string password;
NetworkAddress connectedAddress=NetworkAddress::Empty();
uint16_t connectedPort;
ConnectionState state=ConnectionState::Initial;
};
}
#endif //LIBTGVOIP_NETWORKSOCKET_H