ClientReceiveHandler Class Reference

Handles incoming packets from the server and performs client-side actions accordingly. More...

Inheritance diagram for ClientReceiveHandler:

Static Public Member Functions
static bool	ValidateHmac (Packet receivedPacket)
	Validates the HMAC of a received packet using the client's stored key.
static byte[]	GenerateHmac (byte[] data, byte[] key)
	Generates a HMAC-SHA256 hash for the provided data using the given key.
static void	Welcome (Packet receivedPacket)
	Handles the welcome packet from the server, sets the client ID, and initiates UDP connection.
static void	ReceiveHmacKey (Packet receivedPacket)
	Handles receiving the HMAC key from the server and stores it on the client.
static void	ReceiveToken (Packet receivedPacket)
	Handles receiving an authentication token from the server and stores it on the client.
static void	Latency (Packet receivedPacket)
	Handles a latency response packet from the server.
static void	SpawnUser (Packet receivedPacket)
	Spawns a user prefab on the client.
static void	BandwidthReply (Packet receivedPacket)
	Handles a bandwidth test response from the server.
static void	ThroughputReply (Packet receivedPacket)
	Handles a throughput test response from the server.
static void	ReceiveMessage (Packet receivedPacket)
	Receives a private text message from server.
static void	ReceiveMessageAll (Packet receivePacket)
	Receives a broadcast message sent to all clients by the server.
static void	DisconnectUser (Packet receivedPacket)
	Handles disconnection of a specific client.
static void	TransformUpdate (Packet receivedPacket)
	Receives and applies a position and rotation update for a user in the scene.
static void	AnimationUpdate (Packet receivedPacket)
	Receives and applies an animation update from the server for a specific user.

Detailed Description

Handles incoming packets from the server and performs client-side actions accordingly.

Definition at line 10 of file ClientReceiveHandler.cs.

Member Function Documentation

AnimationUpdate()

void ClientReceiveHandler.AnimationUpdate ( Packet receivedPacket )

static

Receives and applies an animation update from the server for a specific user.

Definition at line 169 of file ClientReceiveHandler.cs.

    {
        int id = receivedPacket.ReadInt();
        int type = receivedPacket.ReadInt();
        string paramName = receivedPacket.ReadString();
        float value;
        if (type != 2)
        {
            value = receivedPacket.ReadFloat();
        } else {
            value = 0f;
        }
        Client.instance.ChangeAnimatorState(id,type,paramName,value);
    }

BandwidthReply()

void ClientReceiveHandler.BandwidthReply ( Packet receivedPacket )

static

Handles a bandwidth test response from the server.

Definition at line 97 of file ClientReceiveHandler.cs.

    {
        if (Client.instance.GetDefaultSettings().useHMAC == true)
        {
            if (!ValidateHmac(receivedPacket))
            {
                Debug.LogError("Invalid HMAC received for packet. Dropping packet.");
                return;
            }
        }
        Client.instance.ReceivedBandwidth();
    }

DisconnectUser()

void ClientReceiveHandler.DisconnectUser ( Packet receivedPacket )

static

Handles disconnection of a specific client.

Definition at line 145 of file ClientReceiveHandler.cs.

    {
        int clientId = receivedPacket.ReadInt();
        if(clientId == Client.instance.GetId())
        {
            Client.instance.Disconnect();
        } else
        {
            Client.instance.DisconnectOther(clientId);
        }
    }

GenerateHmac()

byte[] ClientReceiveHandler.GenerateHmac ( byte[] data, byte[] key )

static

Generates a HMAC-SHA256 hash for the provided data using the given key.

Definition at line 28 of file ClientReceiveHandler.cs.

    {
        using (HMACSHA256 hmac = new HMACSHA256(key))
        {
            return hmac.ComputeHash(data);
        }
    }

Latency()

void ClientReceiveHandler.Latency ( Packet receivedPacket )

static

Handles a latency response packet from the server.

Definition at line 71 of file ClientReceiveHandler.cs.

    {
        int clientId = receivedPacket.ReadInt();
        int pcktId = receivedPacket.ReadInt();
        Client.instance.MeassureAnswer(pcktId);
    }

ReceiveHmacKey()

void ClientReceiveHandler.ReceiveHmacKey ( Packet receivedPacket )

static

Handles receiving the HMAC key from the server and stores it on the client.

Definition at line 54 of file ClientReceiveHandler.cs.

    {
        int keyLength = receivedPacket.ReadInt(); 
        byte[] hmacKey = receivedPacket.ReadBytes(keyLength); 
        Client.instance.SetHmacKey(hmacKey);
    }

ReceiveMessage()

void ClientReceiveHandler.ReceiveMessage ( Packet receivedPacket )

static

Receives a private text message from server.

Definition at line 121 of file ClientReceiveHandler.cs.

    {
        if (Client.instance.GetDefaultSettings().useHMAC == true)
        {
            if (!ValidateHmac(receivedPacket))
            {
                Debug.LogError("Invalid HMAC received for packet. Dropping packet.");
                return;
            }
        }
        string message = receivedPacket.ReadString();
        Client.instance.ReceivedMessage(message);
    }

ReceiveMessageAll()

void ClientReceiveHandler.ReceiveMessageAll ( Packet receivePacket )

static

Receives a broadcast message sent to all clients by the server.

Definition at line 137 of file ClientReceiveHandler.cs.

    {
        string message = receivePacket.ReadString();
        Client.instance.ReceivedMessage(message);
    }

ReceiveToken()

void ClientReceiveHandler.ReceiveToken ( Packet receivedPacket )

static

Handles receiving an authentication token from the server and stores it on the client.

Definition at line 63 of file ClientReceiveHandler.cs.

    {
        string token = receivedPacket.ReadString();
        Client.instance.SetToken(token);
    }

SpawnUser()

void ClientReceiveHandler.SpawnUser ( Packet receivedPacket )

static

Spawns a user prefab on the client.

Definition at line 80 of file ClientReceiveHandler.cs.

    {
        if (Client.instance.GetDefaultSettings().useHMAC == true)
        {
            if (!ValidateHmac(receivedPacket))
            {
                Debug.LogError("Invalid HMAC received for packet. Dropping packet.");
                return;
            }
        }
        int clientId = receivedPacket.ReadInt();
        string userName = receivedPacket.ReadString();
        Client.instance.SpawnUserPrefab(clientId, userName);
    }

ThroughputReply()

void ClientReceiveHandler.ThroughputReply ( Packet receivedPacket )

static

Handles a throughput test response from the server.

Definition at line 112 of file ClientReceiveHandler.cs.

    {
        int pcktId = receivedPacket.ReadInt();
        int dataSize = receivedPacket.ReadInt();
        Client.instance.ReceivedThroughput(pcktId, dataSize);
    }

TransformUpdate()

void ClientReceiveHandler.TransformUpdate ( Packet receivedPacket )

static

Receives and applies a position and rotation update for a user in the scene.

Definition at line 159 of file ClientReceiveHandler.cs.

    {
        int id = receivedPacket.ReadInt();
        Vector3 pos = receivedPacket.ReadVector3();
        Quaternion rot = receivedPacket.ReadQuaternion();
        Client.instance.ChangeTransform(id, pos, rot);
    }

ValidateHmac()

bool ClientReceiveHandler.ValidateHmac ( Packet receivedPacket )

static

Validates the HMAC of a received packet using the client's stored key.

Validity check of HMAC.

Definition at line 15 of file ClientReceiveHandler.cs.

    {
        byte[] dataWithoutHmac = receivedPacket.GetDataWithoutHmac(); 
        byte[] receivedHmac = receivedPacket.GetHmac(); 
        byte[] expectedHmac = GenerateHmac(dataWithoutHmac, Client.instance.GetHmacKey());
        return StructuralComparisons.StructuralEqualityComparer.Equals(receivedHmac, expectedHmac);
    }

Welcome()

void ClientReceiveHandler.Welcome ( Packet receivedPacket )

static

Handles the welcome packet from the server, sets the client ID, and initiates UDP connection.

Definition at line 38 of file ClientReceiveHandler.cs.

    {
        string ReceivedMessage = receivedPacket.ReadString();
        int id = receivedPacket.ReadInt();
        Client.instance.SetId(id);
        if(ReceivedMessage != "")
        {
            Client.instance.ReceivedMessage($"Server message: {ReceivedMessage} [{Client.instance.GetUsername()}]");
        }
        ClientSendHandler.WelcomeReceived();
        Client.instance.isConnected = true;
        Client.instance.udp.Connect(((IPEndPoint)Client.instance.tcp.Socket.Client.LocalEndPoint).Port);
    }