/// <summary>
/// The server sent us a message before sending a response header to validate
/// This happens if the server is not accepting connections or the max connection count has been reached
/// We will get two messages. The first one is either a MAX_CONNECTIONS or NOT_ACCEPT_CONNECTIONS group message.
/// The second one will be the DISCONNECT message
/// </summary>
/// <param name="packet">The packet recieved causing relating to the rejection</param>
private void HandleServerRejection(BMSByte packet)
{
UDPPacket formattedPacket = TranscodePacket(ServerPlayer, packet);
if (formattedPacket.groupId == MessageGroupIds.MAX_CONNECTIONS)
{
Logging.BMSLog.LogWarning("Max Players Reached On Server");
}
else if (formattedPacket.groupId == MessageGroupIds.NOT_ACCEPT_CONNECTIONS)
{
Logging.BMSLog.LogWarning("The server is busy and not accepting connections");
}
else if (formattedPacket.groupId == MessageGroupIds.DISCONNECT)
{
CloseConnection();
}
else
{
// Received something unexpected so do the same thing as the if below
Disconnect(true);
CancelReadThread();
}
}
/// <summary>
/// Infinite loop listening for new data from all connected clients on a separate thread.
/// This loop breaks when readThreadCancel is set to true
/// </summary>
private void ReadNetwork()
{
CSteamID messageFrom = default(CSteamID);
try
{
BMSByte packet = null;
// Intentional infinite loop
while (IsBound)
{
// If the read has been flagged to be canceled then break from this loop
if (readThreadCancel)
{
return;
}
try
{
uint msgSize = 0;
if (SteamNetworking.IsP2PPacketAvailable(out msgSize))
{
packet = Client.Receive(msgSize, out messageFrom);
}
else
{
Thread.Sleep(1);
continue;
}
// Read a packet from the network
if (PacketLossSimulation > 0.0f && new Random().NextDouble() <= PacketLossSimulation)
{
// Skip this message
continue;
}
BandwidthIn += (ulong)packet.Size;
}
catch (SocketException ex)
{
// This is a common exception when we exit the blocking call
Logging.BMSLog.LogException(ex);
Disconnect(true);
}
// Check to make sure a message was received
if (packet == null || packet.Size <= 0)
{
continue;
}
// Check to see if the headers have been exchanged
if (!headerExchanged)
{
if (Websockets.ValidateResponseHeader(headerHash, packet.CompressBytes()))
{
headerExchanged = true;
// TODO: When getting the user id, it should also get the server time
// by using the current time in the payload and getting it back along with server time
// Ping the server to finalize the player's connection
Send(Text.CreateFromString(Time.Timestep, InstanceGuid.ToString(), false, Receivers.Server, MessageGroupIds.NETWORK_ID_REQUEST, false), true);
}
else if (packet.Size != 1 || packet[0] != 0)
{
Logging.BMSLog.LogWarning("DISCONNECTED: RECEIVED UNKNOWN PACKET BEFORE HEADERS WERE EXCHANGED!");
Disconnect(true);
break;
}
else
{
continue;
}
}
else
{
if (packet.Size < 17)
{
continue;
}
// Format the byte data into a UDPPacket struct
UDPPacket formattedPacket = TranscodePacket(Server, packet);
// Check to see if this is a confirmation packet, which is just
// a packet to say that the reliable packet has been read
if (formattedPacket.isConfirmation)
{
if (formattedPacket.groupId == MessageGroupIds.DISCONNECT)
{
CloseConnection();
return;
}
OnMessageConfirmed(server, formattedPacket);
continue;
}
// Add the packet to the manager so that it can be tracked and executed on complete
packetManager.AddPacket(formattedPacket, PacketSequenceComplete, this);
}
}
}
catch (Exception ex)
{
Logging.BMSLog.LogException(ex);
Disconnect(true);
}
}
/// <summary>
/// Infinite loop listening for new data from all connected clients on a separate thread.
/// This loop breaks when readThreadCancel is set to true
/// </summary>
private void ReadNetwork()
{
IPEndPoint groupEP = new IPEndPoint(IPAddress.Any, 0);
string incomingEndpoint = string.Empty;
try
{
BMSByte packet = null;
// Intentional infinite loop
while (IsBound)
{
// If the read has been flagged to be canceled then break from this loop
if (readThreadCancel)
{
return;
}
try
{
// Read a packet from the network
packet = Client.Receive(ref groupEP, ref incomingEndpoint);
if (PacketLossSimulation > 0.0f && new Random().NextDouble() <= PacketLossSimulation)
{
// Skip this message
continue;
}
BandwidthIn += (ulong)packet.Size;
}
catch (SocketException /*ex*/)
{
// This is a common exception when we exit the blocking call
//Logging.BMSLog.LogException(ex);
Disconnect(true);
}
// Check to make sure a message was received
if (packet == null || packet.Size <= 0)
{
continue;
}
// This message was not from the server
if (groupEP.Address != Server.IPEndPointHandle.Address &&
groupEP.Port != Server.IPEndPointHandle.Port)
{
if (packet.Size == 1 && (packet[0] == SERVER_BROADCAST_CODE || packet[1] == CLIENT_BROADCAST_CODE))
{
}
else if (packet.Size.Between(2, 4) && packet[0] == BROADCAST_LISTING_REQUEST_1 && packet[1] == BROADCAST_LISTING_REQUEST_2 && packet[2] == BROADCAST_LISTING_REQUEST_3)
{
// This may be a local listing request so respond with the client flag byte
Client.Send(new byte[] { CLIENT_BROADCAST_CODE }, 1, groupEP);
}
continue;
}
// Check to see if the headers have been exchanged
if (!headerExchanged)
{
if (Websockets.ValidateResponseHeader(headerHash, packet.CompressBytes()))
{
headerExchanged = true;
// TODO: When getting the user id, it should also get the server time
// by using the current time in the payload and getting it back along with server time
// Ping the server to finalize the player's connection
Send(Text.CreateFromString(Time.Timestep, InstanceGuid.ToString(), false, Receivers.Server, MessageGroupIds.NETWORK_ID_REQUEST, false), true);
}
else if (packet.Size >= MINIMUM_FRAME_SIZE)
{
// The server sent us a message before sending a responseheader to validate
// This happens if the server is not accepting connections or the max connection count has been reached
// We will get two messages. The first one is either a MAX_CONNECTIONS or NOT_ACCEPT_CONNECTIONS group message.
// The second one will be the DISCONNECT message
UDPPacket formattedPacket = TranscodePacket(Server, packet);
if (formattedPacket.groupId == MessageGroupIds.MAX_CONNECTIONS)
{
Logging.BMSLog.LogWarning("Max Players Reached On Server");
// Wait for the second message (Disconnect)
continue;
}
if (formattedPacket.groupId == MessageGroupIds.NOT_ACCEPT_CONNECTIONS)
{
Logging.BMSLog.LogWarning("The server is busy and not accepting connections");
// Wait for the second message (Disconnect)
continue;
}
if (formattedPacket.groupId == MessageGroupIds.DISCONNECT)
{
CloseConnection();
return;
}
// Received something unexpected so do the same thing as the if below
Disconnect(true);
break;
}
else if (packet.Size != 1 || packet[0] != 0)
{
Disconnect(true);
break;
}
else
{
continue;
}
}
else
{
if (packet.Size < MINIMUM_FRAME_SIZE)
{
continue;
}
// Format the byte data into a UDPPacket struct
UDPPacket formattedPacket = TranscodePacket(Server, packet);
// Check to see if this is a confirmation packet, which is just
// a packet to say that the reliable packet has been read
if (formattedPacket.isConfirmation)
{
if (formattedPacket.groupId == MessageGroupIds.DISCONNECT)
{
CloseConnection();
return;
}
OnMessageConfirmed(server, formattedPacket);
continue;
}
if (formattedPacket.groupId == MessageGroupIds.AUTHENTICATION_FAILURE)
{
Logging.BMSLog.LogWarning("The server rejected the authentication attempt");
// Wait for the second message (Disconnect)
continue;
}
// Add the packet to the manager so that it can be tracked and executed on complete
packetManager.AddPacket(formattedPacket, PacketSequenceComplete, this);
}
}
}
catch (Exception ex)
{
Logging.BMSLog.LogException(ex);
Disconnect(true);
}
}
private bool IsDisconnectableGroupId(UDPPacket formattedPacket)
{
return(formattedPacket.groupId == MessageGroupIds.DISCONNECT ||
formattedPacket.groupId == MessageGroupIds.AUTHENTICATION_FAILURE);
}
/// <summary>
/// Infinite loop listening for new data from all connected clients on a separate thread.
/// This loop breaks when readThreadCancel is set to true
/// </summary>
/// <summary>
///无限循环在单独的线程上监听来自所有连接客户端的新数据。
///当readThreadCancel设置为true时，此循环中断
/// </ summary>
private void ReadNetwork()
{
IPEndPoint groupEP = new IPEndPoint(IPAddress.Any, 0);
string incomingEndpoint = string.Empty;
try
{
BMSByte packet = null;
// Intentional infinite loop
while (IsBound)
{
//如果读取已被标记为取消，则从此循环中断开
// If the read has been flagged to be canceled then break from this loop
if (readThreadCancel)
{
return;
}
try
{
// Read a packet from the network
packet = Client.Receive(ref groupEP, ref incomingEndpoint);
if (PacketLossSimulation > 0.0f && new Random().NextDouble() <= PacketLossSimulation)
{
// Skip this message
continue;
}
BandwidthIn += (ulong)packet.Size;
}
catch (SocketException /*ex*/)
{
// This is a common exception when we exit the blocking call
//Logging.BMSLog.LogException(ex);
Disconnect(true);
}
// Check to make sure a message was received
if (packet == null || packet.Size <= 0)
{
continue;
}
// This message was not from the server
if (groupEP.Address != Server.IPEndPointHandle.Address &&
groupEP.Port != Server.IPEndPointHandle.Port)
{
if (packet.Size == 1 && (packet[0] == SERVER_BROADCAST_CODE || packet[1] == CLIENT_BROADCAST_CODE))
{
}
else if (packet.Size.Between(2, 4) && packet[0] == BROADCAST_LISTING_REQUEST_1 && packet[1] == BROADCAST_LISTING_REQUEST_2 && packet[2] == BROADCAST_LISTING_REQUEST_3)
{
//这可能是一个本地列表请求，所以用客户端标志字节进行响应
// This may be a local listing request so respond with the client flag byte
Client.Send(new byte[] { CLIENT_BROADCAST_CODE }, 1, groupEP);
}
continue;
}
// Check to see if the headers have been exchanged
if (!headerExchanged)
{
if (Websockets.ValidateResponseHeader(headerHash, packet.CompressBytes()))
{
headerExchanged = true;
// TODO: When getting the user id, it should also get the server time
// by using the current time in the payload and getting it back along with server time
// Ping the server to finalize the player's connection
Send(Text.CreateFromString(Time.Timestep, InstanceGuid.ToString(), false, Receivers.Server, MessageGroupIds.NETWORK_ID_REQUEST, false), true);
}
else if (packet.Size != 1 || packet[0] != 0)
{
Disconnect(true);
break;
}
else
{
continue;
}
}
else
{
if (packet.Size < 17)
{
continue;
}
// 格式的字节数据到一个udppacket结构
// Format the byte data into a UDPPacket struct
UDPPacket formattedPacket = TranscodePacket(Server, packet);
// Check to see if this is a confirmation packet, which is just
// a packet to say that the reliable packet has been read
if (formattedPacket.isConfirmation)
{
if (formattedPacket.groupId == MessageGroupIds.DISCONNECT)
{
CloseConnection();
return;
}
OnMessageConfirmed(server, formattedPacket);
continue;
}
//将数据包添加到管理器，以便可以在完成时跟踪和执行
// Add the packet to the manager so that it can be tracked and executed on complete
packetManager.AddPacket(formattedPacket, PacketSequenceComplete, this);
}
}
}
catch (Exception ex)
{
Logging.BMSLog.LogException(ex);
Disconnect(true);
}
}
