diff options
Diffstat (limited to 'ProtoProxy/Connection.h')
| -rw-r--r-- | ProtoProxy/Connection.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/ProtoProxy/Connection.h b/ProtoProxy/Connection.h index decf42435..8022a293f 100644 --- a/ProtoProxy/Connection.h +++ b/ProtoProxy/Connection.h @@ -10,6 +10,7 @@ #pragma once
#include <time.h>
+#include "ByteBuffer.h"
@@ -32,6 +33,18 @@ class cConnection clock_t m_BeginTick; // Tick when the relative time was first retrieved (used for GetRelativeTime())
+ enum eConnectionState
+ {
+ csUnencrypted, // The connection is not encrypted. Packets must be decoded in order to be able to start decryption.
+ csEncryptedUnderstood, // The communication is encrypted and so far all packets have been understood, so they can be still decoded
+ csEncryptedUnknown, // The communication is encrypted, but an unknown packet has been received, so packets cannot be decoded anymore
+ };
+
+ eConnectionState m_ClientState;
+ eConnectionState m_ServerState;
+
+ int m_Nonce;
+
public:
cConnection(SOCKET a_ClientSocket, cServer & a_Server);
~cConnection();
@@ -42,6 +55,18 @@ public: void DataLog(const void * a_Data, int a_Size, const char * a_Format, ...);
protected:
+ typedef CFB_Mode<AES>::Encryption Encryptor;
+ typedef CFB_Mode<AES>::Decryption Decryptor;
+
+ cByteBuffer m_ClientBuffer;
+ cByteBuffer m_ServerBuffer;
+
+ Decryptor m_ServerDecryptor;
+ Encryptor m_ServerEncryptor;
+
+ Decryptor m_ClientDecryptor;
+ Encryptor m_ClientEncryptor;
+
bool ConnectToServer(void);
/// Relays data from server to client; returns false if connection aborted
@@ -52,6 +77,40 @@ protected: /// Returns the time relative to the first call of this function, in the fractional seconds elapsed
double GetRelativeTime(void);
+
+ /// Sends data to the specified socket. If sending fails, prints a fail message using a_Peer and returns false.
+ bool SendData(SOCKET a_Socket, const char * a_Data, int a_Size, const char * a_Peer);
+
+ /// Sends data to the specified socket. If sending fails, prints a fail message using a_Peer and returns false.
+ bool SendData(SOCKET a_Socket, cByteBuffer & a_Data, const char * a_Peer);
+
+ /// Sends data to the specfied socket, after encrypting it using a_Encryptor. If sending fails, prints a fail message using a_Peer and returns false
+ bool SendEncryptedData(SOCKET a_Socket, Encryptor & a_Encryptor, const char * a_Data, int a_Size, const char * a_Peer);
+
+ /// Sends data to the specfied socket, after encrypting it using a_Encryptor. If sending fails, prints a fail message using a_Peer and returns false
+ bool SendEncryptedData(SOCKET a_Socket, Encryptor & a_Encryptor, cByteBuffer & a_Data, const char * a_Peer);
+
+ /// Decodes packets coming from the client, sends appropriate counterparts to the server; returns false if the connection is to be dropped
+ bool DecodeClientsPackets(const char * a_Data, int a_Size);
+
+ /// Decodes packets coming from the server, sends appropriate counterparts to the client; returns false if the connection is to be dropped
+ bool DecodeServersPackets(const char * a_Data, int a_Size);
+
+ // Packet handling, client-side:
+ void HandleClientEncryptionKeyResponse(void);
+ void HandleClientHandshake(void);
+ void HandleClientPing(void);
+
+ // Packet handling, server-side:
+ void HandleServerEncryptionKeyRequest(void);
+ void HandleServerEncryptionKeyResponse(void);
+ void HandleServerKick(void);
+
+ /// Send EKResp to the server:
+ void SendEncryptionKeyResponse(const AString & a_ServerPublicKey, const AString & a_Nonce);
+
+ /// Starts client encryption based on the parameters received
+ void StartClientEncryption(const AString & a_EncryptedSecret, const AString & a_EncryptedNonce);
} ;
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