| private DebugWriteError ( string str ) : void | ||
| str | string | |
| return | void | |
internal void AddIncomingPacket(NetPacket p)
{
if (p.IsFragmented)
{
NetUtils.DebugWrite("Fragment. Id: {0}, Part: {1}, Total: {2}", p.FragmentId, p.FragmentPart, p.FragmentsTotal);
//Get needed array from dictionary
ushort packetFragId = p.FragmentId;
IncomingFragments incomingFragments;
if (!_holdedFragments.TryGetValue(packetFragId, out incomingFragments))
{
incomingFragments = new IncomingFragments
{
Fragments = new NetPacket[p.FragmentsTotal]
};
_holdedFragments.Add(packetFragId, incomingFragments);
}
//Cache
var fragments = incomingFragments.Fragments;
//Error check
if (p.FragmentPart >= fragments.Length || fragments[p.FragmentPart] != null)
{
_packetPool.Recycle(p);
NetUtils.DebugWriteError("Invalid fragment packet");
return;
}
//Fill array
fragments[p.FragmentPart] = p;
//Increase received fragments count
incomingFragments.ReceivedCount++;
//Increase total size
int dataOffset = p.GetHeaderSize() + NetConstants.FragmentHeaderSize;
incomingFragments.TotalSize += p.Size - dataOffset;
//Check for finish
if (incomingFragments.ReceivedCount != fragments.Length)
{
return;
}
NetUtils.DebugWrite("Received all fragments!");
NetPacket resultingPacket = _packetPool.GetWithProperty(p.Property, incomingFragments.TotalSize);
int resultingPacketOffset = resultingPacket.GetHeaderSize();
int firstFragmentSize = fragments[0].Size - dataOffset;
for (int i = 0; i < incomingFragments.ReceivedCount; i++)
{
//Create resulting big packet
int fragmentSize = fragments[i].Size - dataOffset;
Buffer.BlockCopy(
fragments[i].RawData,
dataOffset,
resultingPacket.RawData,
resultingPacketOffset + firstFragmentSize * i,
fragmentSize);
//Free memory
_packetPool.Recycle(fragments[i]);
fragments[i] = null;
}
//Send to process
_netManager.ReceiveFromPeer(resultingPacket, _remoteEndPoint);
//Clear memory
_holdedFragments.Remove(packetFragId);
}
else //Just simple packet
{
_netManager.ReceiveFromPeer(p, _remoteEndPoint);
}
}
private void DataReceived(byte[] reusableBuffer, int count, NetEndPoint remoteEndPoint)
{
#if STATS_ENABLED
Statistics.PacketsReceived++;
Statistics.BytesReceived += (uint)count;
#endif
//Try read packet
NetPacket packet = _netPacketPool.GetAndRead(reusableBuffer, 0, count);
if (packet == null)
{
NetUtils.DebugWriteError("[NM] DataReceived: bad!");
return;
}
//Check unconnected
switch (packet.Property)
{
case PacketProperty.DiscoveryRequest:
if (DiscoveryEnabled)
{
var netEvent = CreateEvent(NetEventType.DiscoveryRequest);
netEvent.RemoteEndPoint = remoteEndPoint;
netEvent.DataReader.SetSource(packet.RawData, NetConstants.HeaderSize, count);
EnqueueEvent(netEvent);
}
return;
case PacketProperty.DiscoveryResponse:
{
var netEvent = CreateEvent(NetEventType.DiscoveryResponse);
netEvent.RemoteEndPoint = remoteEndPoint;
netEvent.DataReader.SetSource(packet.RawData, NetConstants.HeaderSize, count);
EnqueueEvent(netEvent);
}
return;
case PacketProperty.UnconnectedMessage:
if (UnconnectedMessagesEnabled)
{
var netEvent = CreateEvent(NetEventType.ReceiveUnconnected);
netEvent.RemoteEndPoint = remoteEndPoint;
netEvent.DataReader.SetSource(packet.RawData, NetConstants.HeaderSize, count);
EnqueueEvent(netEvent);
}
return;
case PacketProperty.NatIntroduction:
case PacketProperty.NatIntroductionRequest:
case PacketProperty.NatPunchMessage:
{
if (NatPunchEnabled)
{
NatPunchModule.ProcessMessage(remoteEndPoint, packet);
}
return;
}
}
//Check normal packets
NetPeer netPeer;
//Check peers
Monitor.Enter(_peers);
int peersCount = _peers.Count;
if (_peers.TryGetValue(remoteEndPoint, out netPeer))
{
Monitor.Exit(_peers);
//Send
if (packet.Property == PacketProperty.Disconnect)
{
if (BitConverter.ToInt64(packet.RawData, 1) != netPeer.ConnectId)
{
//Old or incorrect disconnect
_netPacketPool.Recycle(packet);
return;
}
var netEvent = CreateEvent(NetEventType.Disconnect);
netEvent.Peer = netPeer;
netEvent.DataReader.SetSource(packet.RawData, 9, packet.Size);
netEvent.DisconnectReason = DisconnectReason.RemoteConnectionClose;
EnqueueEvent(netEvent);
_peers.Remove(netPeer.EndPoint);
//do not recycle because no sense)
}
else if (packet.Property == PacketProperty.ConnectAccept)
{
if (netPeer.ProcessConnectAccept(packet))
{
var connectEvent = CreateEvent(NetEventType.Connect);
connectEvent.Peer = netPeer;
EnqueueEvent(connectEvent);
}
_netPacketPool.Recycle(packet);
}
else
{
netPeer.ProcessPacket(packet);
}
return;
}
try
{
if (peersCount < _maxConnections && packet.Property == PacketProperty.ConnectRequest)
{
int protoId = BitConverter.ToInt32(packet.RawData, 1);
if (protoId != NetConstants.ProtocolId)
{
NetUtils.DebugWrite(ConsoleColor.Cyan,
"[NM] Peer connect reject. Invalid protocol ID: " + protoId);
return;
}
string peerKey = Encoding.UTF8.GetString(packet.RawData, 13, packet.Size - 13);
if (peerKey != ConnectKey)
{
NetUtils.DebugWrite(ConsoleColor.Cyan, "[NM] Peer connect reject. Invalid key: " + peerKey);
return;
}
//Getting new id for peer
long connectionId = BitConverter.ToInt64(packet.RawData, 5);
//response with id
netPeer = new NetPeer(this, remoteEndPoint, connectionId);
NetUtils.DebugWrite(ConsoleColor.Cyan, "[NM] Received peer connect request Id: {0}, EP: {1}",
netPeer.ConnectId, remoteEndPoint);
//clean incoming packet
_netPacketPool.Recycle(packet);
_peers.Add(remoteEndPoint, netPeer);
var netEvent = CreateEvent(NetEventType.Connect);
netEvent.Peer = netPeer;
EnqueueEvent(netEvent);
}
}
finally
{
Monitor.Exit(_peers);
}
}
private void DataReceived(byte[] reusableBuffer, int count, NetEndPoint remoteEndPoint)
{
#if STATS_ENABLED
Statistics.PacketsReceived++;
Statistics.BytesReceived += (uint)count;
#endif
//Try read packet
NetPacket packet = NetPacketPool.GetAndRead(reusableBuffer, 0, count);
if (packet == null)
{
NetUtils.DebugWriteError("[NM] DataReceived: bad!");
return;
}
//Check unconnected
switch (packet.Property)
{
case PacketProperty.DiscoveryRequest:
if (DiscoveryEnabled)
{
var netEvent = CreateEvent(NetEventType.DiscoveryRequest);
netEvent.RemoteEndPoint = remoteEndPoint;
netEvent.DataReader.SetSource(packet.RawData, NetConstants.HeaderSize, count);
EnqueueEvent(netEvent);
}
return;
case PacketProperty.DiscoveryResponse:
{
var netEvent = CreateEvent(NetEventType.DiscoveryResponse);
netEvent.RemoteEndPoint = remoteEndPoint;
netEvent.DataReader.SetSource(packet.RawData, NetConstants.HeaderSize, count);
EnqueueEvent(netEvent);
}
return;
case PacketProperty.UnconnectedMessage:
if (UnconnectedMessagesEnabled)
{
var netEvent = CreateEvent(NetEventType.ReceiveUnconnected);
netEvent.RemoteEndPoint = remoteEndPoint;
netEvent.DataReader.SetSource(packet.RawData, NetConstants.HeaderSize, count);
EnqueueEvent(netEvent);
}
return;
case PacketProperty.NatIntroduction:
case PacketProperty.NatIntroductionRequest:
case PacketProperty.NatPunchMessage:
{
if (NatPunchEnabled)
{
NatPunchModule.ProcessMessage(remoteEndPoint, packet);
}
return;
}
}
//Check normal packets
NetPeer netPeer;
lock (_peers)
{
_peers.TryGetValue(remoteEndPoint, out netPeer);
}
if (netPeer != null &&
netPeer.ConnectionState != ConnectionState.Disconnected)
{
switch (packet.Property)
{
case PacketProperty.Disconnect:
if (netPeer.ConnectionState == ConnectionState.InProgress ||
netPeer.ConnectionState == ConnectionState.Connected)
{
if (BitConverter.ToInt64(packet.RawData, 1) != netPeer.ConnectId)
{
//Old or incorrect disconnect
NetPacketPool.Recycle(packet);
return;
}
var netEvent = CreateEvent(NetEventType.Disconnect);
netEvent.Peer = netPeer;
netEvent.DataReader.SetSource(packet.RawData, 9, packet.Size);
netEvent.DisconnectReason = DisconnectReason.RemoteConnectionClose;
EnqueueEvent(netEvent);
}
break;
case PacketProperty.ShutdownOk:
if (netPeer.ConnectionState != ConnectionState.ShutdownRequested)
{
return;
}
netPeer.ProcessPacket(packet);
NetUtils.DebugWriteForce(ConsoleColor.Cyan, "[NM] ShutdownOK!");
break;
case PacketProperty.ConnectAccept:
if (netPeer.ProcessConnectAccept(packet))
{
var connectEvent = CreateEvent(NetEventType.Connect);
connectEvent.Peer = netPeer;
EnqueueEvent(connectEvent);
}
NetPacketPool.Recycle(packet);
return;
default:
netPeer.ProcessPacket(packet);
return;
}
return;
}
//Unacked shutdown
if (packet.Property == PacketProperty.Disconnect)
{
byte[] data = { (byte)PacketProperty.ShutdownOk };
SendRaw(data, 0, 1, remoteEndPoint);
return;
}
if (packet.Property == PacketProperty.ConnectRequest && packet.Size >= 12)
{
int peersCount = GetPeersCount(ConnectionState.Connected | ConnectionState.InProgress);
lock (_connectingPeers)
{
if (_connectingPeers.Contains(remoteEndPoint))
{
return;
}
if (peersCount < _maxConnections)
{
int protoId = BitConverter.ToInt32(packet.RawData, 1);
if (protoId != NetConstants.ProtocolId)
{
NetUtils.DebugWrite(ConsoleColor.Cyan,
"[NM] Peer connect reject. Invalid protocol ID: " + protoId);
return;
}
//Getting new id for peer
long connectionId = BitConverter.ToInt64(packet.RawData, 5);
// Read data and create request
var reader = new NetDataReader(null, 0, 0);
if (packet.Size > 12)
{
reader.SetSource(packet.RawData, 13, packet.Size);
}
_connectingPeers.Add(remoteEndPoint);
var netEvent = CreateEvent(NetEventType.ConnectionRequest);
netEvent.ConnectionRequest =
new ConnectionRequest(connectionId, remoteEndPoint, reader, OnConnectionSolved);
EnqueueEvent(netEvent);
}
}
}
}
public bool Bind(int port, bool reuseAddress)
{
_udpSocketv4 = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
_udpSocketv4.Blocking = false;
_udpSocketv4.ReceiveBufferSize = NetConstants.SocketBufferSize;
_udpSocketv4.SendBufferSize = NetConstants.SocketBufferSize;
_udpSocketv4.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.IpTimeToLive, NetConstants.SocketTTL);
if (reuseAddress)
{
_udpSocketv4.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
}
#if !NETCORE
_udpSocketv4.DontFragment = true;
#endif
try
{
_udpSocketv4.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.Broadcast, 1);
}
catch (SocketException e)
{
NetUtils.DebugWriteError("Broadcast error: {0}", e.ToString());
}
if (!BindSocket(_udpSocketv4, new IPEndPoint(IPAddress.Any, port)))
{
return(false);
}
_port = ((IPEndPoint)_udpSocketv4.LocalEndPoint).Port;
_running = true;
_threadv4 = new Thread(ReceiveLogic);
_threadv4.Name = "SocketThreadv4(" + _port + ")";
_threadv4.IsBackground = true;
_threadv4.Start(_udpSocketv4);
//Check IPv6 support
if (!IPv6Support)
{
return(true);
}
_udpSocketv6 = new Socket(AddressFamily.InterNetworkV6, SocketType.Dgram, ProtocolType.Udp);
_udpSocketv6.Blocking = false;
_udpSocketv6.ReceiveBufferSize = NetConstants.SocketBufferSize;
_udpSocketv6.SendBufferSize = NetConstants.SocketBufferSize;
if (reuseAddress)
{
_udpSocketv6.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
}
//Use one port for two sockets
if (BindSocket(_udpSocketv6, new IPEndPoint(IPAddress.IPv6Any, _port)))
{
try
{
#if !ENABLE_IL2CPP
_udpSocketv6.SetSocketOption(
SocketOptionLevel.IPv6,
SocketOptionName.AddMembership,
new IPv6MulticastOption(MulticastAddressV6));
#endif
}
catch (Exception)
{
// Unity3d throws exception - ignored
}
_threadv6 = new Thread(ReceiveLogic);
_threadv6.Name = "SocketThreadv6(" + _port + ")";
_threadv6.IsBackground = true;
_threadv6.Start(_udpSocketv6);
}
return(true);
}
//Process incoming packet
internal void ProcessPacket(NetPacket packet)
{
_timeSinceLastPacket = 0;
NetUtils.DebugWrite("[RR]PacketProperty: {0}", packet.Property);
switch (packet.Property)
{
case PacketProperty.ConnectRequest:
//response with connect
long newId = BitConverter.ToInt64(packet.RawData, NetConstants.RequestConnectIdIndex);
NetUtils.DebugWrite("ConnectRequest LastId: {0}, NewId: {1}, EP: {2}", _connectId, newId, _remoteEndPoint);
if (newId > _connectId)
{
_connectId = newId;
}
SendConnectAccept();
_packetPool.Recycle(packet);
break;
case PacketProperty.Merged:
int pos = NetConstants.HeaderSize;
while (pos < packet.Size)
{
ushort size = BitConverter.ToUInt16(packet.RawData, pos);
pos += 2;
NetPacket mergedPacket = _packetPool.GetAndRead(packet.RawData, pos, size);
if (mergedPacket == null)
{
_packetPool.Recycle(packet);
break;
}
pos += size;
ProcessPacket(mergedPacket);
}
break;
//If we get ping, send pong
case PacketProperty.Ping:
if (NetUtils.RelativeSequenceNumber(packet.Sequence, _remotePingSequence) < 0)
{
_packetPool.Recycle(packet);
break;
}
NetUtils.DebugWrite("[PP]Ping receive, send pong");
_remotePingSequence = packet.Sequence;
_packetPool.Recycle(packet);
//send
CreateAndSend(PacketProperty.Pong, _remotePingSequence);
break;
//If we get pong, calculate ping time and rtt
case PacketProperty.Pong:
if (NetUtils.RelativeSequenceNumber(packet.Sequence, _pingSequence) < 0)
{
_packetPool.Recycle(packet);
break;
}
_pingSequence = packet.Sequence;
int rtt = (int)(DateTime.UtcNow - _pingTimeStart).TotalMilliseconds;
UpdateRoundTripTime(rtt);
NetUtils.DebugWrite("[PP]Ping: {0}", rtt);
_packetPool.Recycle(packet);
break;
//Process ack
case PacketProperty.AckReliable:
_reliableUnorderedChannel.ProcessAck(packet);
_packetPool.Recycle(packet);
break;
case PacketProperty.AckReliableOrdered:
_reliableOrderedChannel.ProcessAck(packet);
_packetPool.Recycle(packet);
break;
//Process in order packets
case PacketProperty.Sequenced:
_sequencedChannel.ProcessPacket(packet);
break;
case PacketProperty.ReliableUnordered:
_reliableUnorderedChannel.ProcessPacket(packet);
break;
case PacketProperty.ReliableOrdered:
_reliableOrderedChannel.ProcessPacket(packet);
break;
case PacketProperty.ReliableSequenced:
_reliableSequencedChannel.ProcessPacket(packet);
break;
//Simple packet without acks
case PacketProperty.Unreliable:
AddIncomingPacket(packet);
return;
case PacketProperty.MtuCheck:
case PacketProperty.MtuOk:
ProcessMtuPacket(packet);
break;
case PacketProperty.ShutdownOk:
_connectionState = ConnectionState.Disconnected;
break;
default:
NetUtils.DebugWriteError("Error! Unexpected packet type: " + packet.Property);
break;
}
}
private void DataReceived(byte[] reusableBuffer, int count, IPEndPoint remoteEndPoint)
{
#if STATS_ENABLED
Statistics.PacketsReceived++;
Statistics.BytesReceived += (uint)count;
#endif
//Try read packet
NetPacket packet = NetPacketPool.GetPacket(count, false);
if (!packet.FromBytes(reusableBuffer, 0, count))
{
NetPacketPool.Recycle(packet);
NetUtils.DebugWriteError("[NM] DataReceived: bad!");
return;
}
//get peer
//Check normal packets
NetPeer netPeer;
//old packets protection
bool peerFound = _peers.TryGetValue(remoteEndPoint, out netPeer);
//Check unconnected
switch (packet.Property)
{
case PacketProperty.DiscoveryRequest:
if (!DiscoveryEnabled)
{
break;
}
CreateEvent(NetEvent.EType.DiscoveryRequest, remoteEndPoint: remoteEndPoint, readerSource: packet);
break;
case PacketProperty.DiscoveryResponse:
CreateEvent(NetEvent.EType.DiscoveryResponse, remoteEndPoint: remoteEndPoint, readerSource: packet);
break;
case PacketProperty.UnconnectedMessage:
if (!UnconnectedMessagesEnabled)
{
break;
}
CreateEvent(NetEvent.EType.ReceiveUnconnected, remoteEndPoint: remoteEndPoint, readerSource: packet);
break;
case PacketProperty.NatIntroduction:
case PacketProperty.NatIntroductionRequest:
case PacketProperty.NatPunchMessage:
if (NatPunchEnabled)
{
NatPunchModule.ProcessMessage(remoteEndPoint, packet);
}
break;
case PacketProperty.Disconnect:
if (peerFound)
{
var disconnectResult = netPeer.ProcessDisconnect(packet);
if (disconnectResult == DisconnectResult.None)
{
NetPacketPool.Recycle(packet);
return;
}
if (disconnectResult == DisconnectResult.Disconnect)
{
_connectedPeersCount--;
}
CreateEvent(
NetEvent.EType.Disconnect,
netPeer,
disconnectReason: disconnectResult == DisconnectResult.Disconnect
? DisconnectReason.RemoteConnectionClose
: DisconnectReason.ConnectionRejected,
readerSource: packet
);
}
else
{
NetPacketPool.Recycle(packet);
}
//Send shutdown
SendRaw(new[] { (byte)PacketProperty.ShutdownOk }, 0, 1, remoteEndPoint);
break;
case PacketProperty.ConnectAccept:
var connAccept = NetConnectAcceptPacket.FromData(packet);
if (connAccept != null && peerFound && netPeer.ProcessConnectAccept(connAccept))
{
CreateEvent(NetEvent.EType.Connect, netPeer);
}
break;
case PacketProperty.ConnectRequest:
var connRequest = NetConnectRequestPacket.FromData(packet);
if (connRequest != null)
{
ProcessConnectRequest(remoteEndPoint, netPeer, connRequest);
}
break;
default:
if (peerFound)
{
netPeer.ProcessPacket(packet);
}
break;
}
}
//Process incoming packet
internal void ProcessPacket(NetPacket packet)
{
_timeSinceLastPacket = 0;
if (packet.ConnectionNumber != _connectNum &&
packet.Property != PacketProperty.ShutdownOk) //withou connectionNum
{
NetUtils.DebugWrite(ConsoleColor.Red, "[RR]Old packet");
_packetPool.Recycle(packet);
return;
}
NetUtils.DebugWrite("[RR]PacketProperty: {0}", packet.Property);
switch (packet.Property)
{
case PacketProperty.Merged:
int pos = NetConstants.HeaderSize;
while (pos < packet.Size)
{
ushort size = BitConverter.ToUInt16(packet.RawData, pos);
pos += 2;
NetPacket mergedPacket = _packetPool.GetPacket(size, false);
if (!mergedPacket.FromBytes(packet.RawData, pos, size))
{
_packetPool.Recycle(packet);
break;
}
pos += size;
ProcessPacket(mergedPacket);
}
break;
//If we get ping, send pong
case PacketProperty.Ping:
if (NetUtils.RelativeSequenceNumber(packet.Sequence, _remotePingSequence) < 0)
{
_packetPool.Recycle(packet);
break;
}
NetUtils.DebugWrite("[PP]Ping receive, send pong");
_remotePingSequence = packet.Sequence;
_packetPool.Recycle(packet);
//send
_pongPacket.Sequence = _remotePingSequence;
_netManager.SendRaw(_pongPacket, _remoteEndPoint);
break;
//If we get pong, calculate ping time and rtt
case PacketProperty.Pong:
if (NetUtils.RelativeSequenceNumber(packet.Sequence, _pingSequence) < 0)
{
_packetPool.Recycle(packet);
break;
}
_pingSequence = packet.Sequence;
int rtt = (int)(DateTime.UtcNow - _pingTimeStart).TotalMilliseconds;
UpdateRoundTripTime(rtt);
NetUtils.DebugWrite("[PP]Ping: {0}", rtt);
_packetPool.Recycle(packet);
break;
//Process ack
case PacketProperty.AckReliable:
_reliableUnorderedChannel.ProcessAck(packet);
_packetPool.Recycle(packet);
break;
case PacketProperty.AckReliableOrdered:
_reliableOrderedChannel.ProcessAck(packet);
_packetPool.Recycle(packet);
break;
//Process in order packets
case PacketProperty.Sequenced:
_sequencedChannel.ProcessPacket(packet);
break;
case PacketProperty.ReliableUnordered:
_reliableUnorderedChannel.ProcessPacket(packet);
break;
case PacketProperty.ReliableOrdered:
_reliableOrderedChannel.ProcessPacket(packet);
break;
case PacketProperty.ReliableSequenced:
_reliableSequencedChannel.ProcessPacket(packet);
break;
case PacketProperty.AckReliableSequenced:
_reliableSequencedChannel.ProcessAck(packet);
_packetPool.Recycle(packet);
break;
//Simple packet without acks
case PacketProperty.Unreliable:
AddIncomingPacket(packet);
return;
case PacketProperty.MtuCheck:
case PacketProperty.MtuOk:
ProcessMtuPacket(packet);
break;
case PacketProperty.ShutdownOk:
if (_connectionState == ConnectionState.ShutdownRequested)
{
_connectionState = ConnectionState.Disconnected;
}
_packetPool.Recycle(packet);
break;
default:
NetUtils.DebugWriteError("Error! Unexpected packet type: " + packet.Property);
break;
}
}
public void Receive(bool ipV6, byte[] receiveBuffer)
{
Socket socket;
EndPoint bufferEndPoint;
NetEndPoint bufferNetEndPoint;
int result;
if (ipV6 == true)
{
socket = _udpSocketv6;
bufferEndPoint = _bufferEndPointv6;
bufferNetEndPoint = _bufferNetEndPointv6;
}
else
{
socket = _udpSocketv4;
bufferEndPoint = _bufferEndPointv4;
bufferNetEndPoint = _bufferNetEndPointv4;
}
while (true)
{
if (socket == null || socket.Available < 1)
{
return;
}
//Reading data
try
{
result = socket.ReceiveFrom(receiveBuffer, 0, receiveBuffer.Length, SocketFlags.None, ref bufferEndPoint);
if (!bufferNetEndPoint.EndPoint.Equals(bufferEndPoint))
{
bufferNetEndPoint = new NetEndPoint((IPEndPoint)bufferEndPoint);
}
}
catch (SocketException ex)
{
if (ex.SocketErrorCode == SocketError.WouldBlock)
{
// Hiii! Increase buffer size
return;
}
if (ex.SocketErrorCode == SocketError.ConnectionReset ||
ex.SocketErrorCode == SocketError.MessageSize ||
ex.SocketErrorCode == SocketError.Interrupted)
{
//10040 - message too long
//10054 - remote close (not error)
//Just UDP
NetUtils.DebugWrite(ConsoleColor.DarkRed, "[R] Ingored error: {0} - {1}", (int)ex.SocketErrorCode, ex.ToString());
return;
}
NetUtils.DebugWriteError("[R]Error code: {0} - {1}", (int)ex.SocketErrorCode, ex.ToString());
_onMessageReceived(null, 0, (int)ex.SocketErrorCode, bufferNetEndPoint);
return;
}
//All ok!
NetUtils.DebugWrite(ConsoleColor.Blue, "[R]Received data from {0}, result: {1}", bufferNetEndPoint.ToString(), result);
_onMessageReceived(receiveBuffer, result, 0, bufferNetEndPoint);
}
}
public bool Bind(IPAddress addressIPv4, IPAddress addressIPv6, int port, bool reuseAddress, bool enableIPv4, bool enableIPv6)
{
if (enableIPv4)
{
_udpSocketv4 = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
_udpSocketv4.Blocking = false;
_udpSocketv4.ReceiveBufferSize = NetConstants.SocketBufferSize;
_udpSocketv4.SendBufferSize = NetConstants.SocketBufferSize;
_udpSocketv4.Ttl = NetConstants.SocketTTL;
if (reuseAddress)
{
_udpSocketv4.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
}
#if !NETCORE
_udpSocketv4.DontFragment = true;
#endif
try
{
_udpSocketv4.EnableBroadcast = true;
}
catch (SocketException e)
{
NetUtils.DebugWriteError("Broadcast error: {0}", e.ToString());
}
if (!BindSocket(_udpSocketv4, new IPEndPoint(addressIPv4, port)))
{
return(false);
}
LocalPort = ((IPEndPoint)_udpSocketv4.LocalEndPoint).Port;
_bufferEndPointv4 = new IPEndPoint(_udpSocketv4.AddressFamily == AddressFamily.InterNetwork ? IPAddress.Any : IPAddress.IPv6Any, 0);
_bufferNetEndPointv4 = new NetEndPoint((IPEndPoint)_bufferEndPointv4);
}
//Check IPv6 support
if (!IPv6Support || enableIPv6 == false)
{
return(true);
}
_udpSocketv6 = new Socket(AddressFamily.InterNetworkV6, SocketType.Dgram, ProtocolType.Udp);
_udpSocketv6.Blocking = false;
_udpSocketv6.ReceiveBufferSize = NetConstants.SocketBufferSize;
_udpSocketv6.SendBufferSize = NetConstants.SocketBufferSize;
//_udpSocketv6.Ttl = NetConstants.SocketTTL;
if (reuseAddress)
{
_udpSocketv6.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
}
//Use one port for two sockets
if (BindSocket(_udpSocketv6, new IPEndPoint(addressIPv6, LocalPort)))
{
try
{
#if !ENABLE_IL2CPP
_udpSocketv6.SetSocketOption(
SocketOptionLevel.IPv6,
SocketOptionName.AddMembership,
new IPv6MulticastOption(MulticastAddressV6));
#endif
}
catch (Exception)
{
// Unity3d throws exception - ignored
}
}
_bufferEndPointv6 = new IPEndPoint(_udpSocketv4.AddressFamily == AddressFamily.InterNetwork ? IPAddress.Any : IPAddress.IPv6Any, 0);
_bufferNetEndPointv6 = new NetEndPoint((IPEndPoint)_bufferEndPointv6);
return(true);
}
private void DataReceived(byte[] reusableBuffer, int count, IPEndPoint remoteEndPoint)
{
#if STATS_ENABLED
Statistics.PacketsReceived++;
Statistics.BytesReceived += (uint)count;
#endif
//Try read packet
NetPacket packet = NetPacketPool.GetPacket(count, false);
if (!packet.FromBytes(reusableBuffer, 0, count))
{
NetPacketPool.Recycle(packet);
NetUtils.DebugWriteError("[NM] DataReceived: bad!");
return;
}
//Check unconnected
switch (packet.Property)
{
case PacketProperty.DiscoveryRequest:
if (DiscoveryEnabled)
{
var netEvent = CreateEvent(NetEventType.DiscoveryRequest);
netEvent.RemoteEndPoint = remoteEndPoint;
netEvent.DataReader.SetSource(packet.RawData, NetConstants.HeaderSize, count);
EnqueueEvent(netEvent);
}
return;
case PacketProperty.DiscoveryResponse:
{
var netEvent = CreateEvent(NetEventType.DiscoveryResponse);
netEvent.RemoteEndPoint = remoteEndPoint;
netEvent.DataReader.SetSource(packet.RawData, NetConstants.HeaderSize, count);
EnqueueEvent(netEvent);
}
return;
case PacketProperty.UnconnectedMessage:
if (UnconnectedMessagesEnabled)
{
var netEvent = CreateEvent(NetEventType.ReceiveUnconnected);
netEvent.RemoteEndPoint = remoteEndPoint;
netEvent.DataReader.SetSource(packet.RawData, NetConstants.HeaderSize, count);
EnqueueEvent(netEvent);
}
return;
case PacketProperty.NatIntroduction:
case PacketProperty.NatIntroductionRequest:
case PacketProperty.NatPunchMessage:
{
if (NatPunchEnabled)
{
NatPunchModule.ProcessMessage(remoteEndPoint, packet);
}
return;
}
}
//Check normal packets
NetPeer netPeer;
bool isPeerConnecting;
lock (_connectingPeers)
{
isPeerConnecting = _connectingPeers.Contains(remoteEndPoint);
_peers.TryGetValue(remoteEndPoint, out netPeer);
}
if (netPeer != null)
{
if (netPeer.ConnectionState == ConnectionState.Disconnected)
{
return;
}
NetEvent netEvent;
switch (packet.Property)
{
case PacketProperty.Disconnect:
if (netPeer.ConnectionState == ConnectionState.InProgress ||
netPeer.ConnectionState == ConnectionState.Connected)
{
if (BitConverter.ToInt64(packet.RawData, 1) != netPeer.ConnectId)
{
//Old or incorrect disconnect
NetPacketPool.Recycle(packet);
return;
}
netEvent = CreateEvent(NetEventType.Disconnect);
netEvent.Peer = netPeer;
netEvent.DataReader.SetSource(packet.RawData, 9, packet.Size);
netEvent.DisconnectReason = DisconnectReason.RemoteConnectionClose;
EnqueueEvent(netEvent);
netPeer.ProcessPacket(packet);
SendRaw(new[] { (byte)PacketProperty.ShutdownOk }, 0, 1, remoteEndPoint);
}
return;
case PacketProperty.ConnectAccept:
if (netPeer.ProcessConnectAccept(packet))
{
var connectEvent = CreateEvent(NetEventType.Connect);
connectEvent.Peer = netPeer;
EnqueueEvent(connectEvent);
}
return;
case PacketProperty.ConnectRequest:
long newId = BitConverter.ToInt64(packet.RawData, NetConstants.RequestConnectIdIndex);
NetUtils.DebugWrite("ConnectRequest LastId: {0}, NewId: {1}, EP: {2}", netPeer.ConnectId, newId, remoteEndPoint);
//Remove old peer and connect new
if (newId > netPeer.ConnectId)
{
netEvent = CreateEvent(NetEventType.Disconnect);
netEvent.Peer = netPeer;
netEvent.DataReader.SetSource(packet.RawData, 9, packet.Size);
netEvent.DisconnectReason = DisconnectReason.RemoteConnectionClose;
_peers.RemovePeer(netPeer);
break;
//To reconnect peer
}
else
{
//Just answer accept
netPeer.ProcessPacket(packet);
return;
}
default:
netPeer.ProcessPacket(packet);
return;
}
}
//Unacked shutdown
if (packet.Property == PacketProperty.Disconnect)
{
SendRaw(new[] { (byte)PacketProperty.ShutdownOk }, 0, 1, remoteEndPoint);
return;
}
if (packet.Property == PacketProperty.ConnectRequest && packet.Size >= 12)
{
NetUtils.DebugWrite("[NM] Received ConnectionRequest");
if (isPeerConnecting)
{
NetUtils.DebugWrite("[NM] Peer already connecting");
return;
}
if (GetPeersCount(ConnectionState.Connected | ConnectionState.InProgress) < _maxConnections)
{
int protoId = BitConverter.ToInt32(packet.RawData, 1);
if (protoId != NetConstants.ProtocolId)
{
NetUtils.DebugWrite(ConsoleColor.Cyan,
"[NM] Peer connect reject. Invalid protocol ID: " + protoId);
return;
}
//Getting new id for peer
long connectionId = BitConverter.ToInt64(packet.RawData, 5);
// Read data and create request
var reader = new NetDataReader(null, 0, 0);
if (packet.Size > 12)
{
reader.SetSource(packet.RawData, 13, packet.Size);
}
NetUtils.DebugWrite("[NM] Creating request event: " + connectionId);
lock (_connectingPeers)
{
_connectingPeers.Add(remoteEndPoint);
}
var netEvent = CreateEvent(NetEventType.ConnectionRequest);
netEvent.ConnectionRequest =
new ConnectionRequest(connectionId, remoteEndPoint, reader, OnConnectionSolved);
EnqueueEvent(netEvent);
}
}
}
private void ReceiveLogic(object state)
{
Socket socket = (Socket)state;
EndPoint bufferEndPoint = new IPEndPoint(socket.AddressFamily == AddressFamily.InterNetwork ? IPAddress.Any : IPAddress.IPv6Any, 0);
NetEndPoint bufferNetEndPoint = new NetEndPoint((IPEndPoint)bufferEndPoint);
#if WIN32 && UNSAFE
int saddrSize = 32;
byte[] prevAddress = new byte[saddrSize];
byte[] socketAddress = new byte[saddrSize];
byte[] addrBuffer = new byte[16]; //IPAddress.IPv6AddressBytes
var sockeHandle = socket.Handle;
IntPtr[] fileDescriptorSet = { (IntPtr)1, sockeHandle };
TimeValue time = new TimeValue {
Microseconds = SocketReceivePollTime
};
#endif
byte[] receiveBuffer = new byte[NetConstants.PacketSizeLimit];
while (_running)
{
int result;
//Reading data
try
{
#if WIN32 && UNSAFE
fileDescriptorSet[0] = (IntPtr)1;
fileDescriptorSet[1] = sockeHandle;
int socketCount = select(0, fileDescriptorSet, null, null, ref time);
if ((SocketError)socketCount == SocketError.SocketError)
{
throw new SocketException(Marshal.GetLastWin32Error());
}
if ((int)fileDescriptorSet[0] == 0 || fileDescriptorSet[1] != sockeHandle)
{
continue;
}
result = recvfrom(
sockeHandle,
receiveBuffer,
receiveBuffer.Length,
SocketFlags.None,
socketAddress,
ref saddrSize);
if ((SocketError)result == SocketError.SocketError)
{
throw new SocketException(Marshal.GetLastWin32Error());
}
bool recreate = false;
for (int i = 0; i < saddrSize; i++)
{
if (socketAddress[i] != prevAddress[i])
{
prevAddress[i] = socketAddress[i];
recreate = true;
}
}
if (recreate)
{
if (socket.AddressFamily == AddressFamily.InterNetwork)
{
int port = (socketAddress[2] << 8 & 0xFF00) | socketAddress[3];
long address = (
(socketAddress[4] & 0x000000FF) |
(socketAddress[5] << 8 & 0x0000FF00) |
(socketAddress[6] << 16 & 0x00FF0000) |
(socketAddress[7] << 24)
) & 0x00000000FFFFFFFF;
bufferNetEndPoint = new NetEndPoint(new IPEndPoint(address, port));
}
else
{
for (int i = 0; i < addrBuffer.Length; i++)
{
addrBuffer[i] = socketAddress[i + 8];
}
int port = (socketAddress[2] << 8 & 0xFF00) | (socketAddress[3]);
long scope = (socketAddress[27] << 24) +
(socketAddress[26] << 16) +
(socketAddress[25] << 8) +
(socketAddress[24]);
bufferNetEndPoint = new NetEndPoint(new IPEndPoint(new IPAddress(addrBuffer, scope), port));
}
}
#else
if (!socket.Poll(SocketReceivePollTime, SelectMode.SelectRead))
{
continue;
}
result = socket.ReceiveFrom(receiveBuffer, 0, receiveBuffer.Length, SocketFlags.None, ref bufferEndPoint);
if (!bufferNetEndPoint.EndPoint.Equals(bufferEndPoint))
{
bufferNetEndPoint = new NetEndPoint((IPEndPoint)bufferEndPoint);
}
#endif
}
catch (SocketException ex)
{
if (ex.SocketErrorCode == SocketError.ConnectionReset ||
ex.SocketErrorCode == SocketError.MessageSize)
{
//10040 - message too long
//10054 - remote close (not error)
//Just UDP
NetUtils.DebugWrite(ConsoleColor.DarkRed, "[R] Ingored error: {0} - {1}", (int)ex.SocketErrorCode, ex.ToString());
continue;
}
NetUtils.DebugWriteError("[R]Error code: {0} - {1}", (int)ex.SocketErrorCode, ex.ToString());
_onMessageReceived(null, 0, (int)ex.SocketErrorCode, bufferNetEndPoint);
continue;
}
//All ok!
NetUtils.DebugWrite(ConsoleColor.Blue, "[R]Received data from {0}, result: {1}", bufferNetEndPoint.ToString(), result);
_onMessageReceived(receiveBuffer, result, 0, bufferNetEndPoint);
}
}
public int SendTo(byte[] data, int offset, int size, NetEndPoint remoteEndPoint, ref int errorCode)
{
try
{
var socket = _udpSocketv4;
if (remoteEndPoint.EndPoint.AddressFamily == AddressFamily.InterNetworkV6 && IPv6Support)
{
socket = _udpSocketv6;
}
int result;
#if WIN32 && UNSAFE
var handle = socket.Handle;
IntPtr[] fileDescriptorSet = { (IntPtr)1, handle };
int socketCount = select(0, null, fileDescriptorSet, null, ref SendPollTime);
if ((SocketError)socketCount == SocketError.SocketError)
{
throw new SocketException(Marshal.GetLastWin32Error());
}
if ((int)fileDescriptorSet[0] == 0 || fileDescriptorSet[1] != handle)
{
return(0);
}
unsafe
{
fixed(byte *pinnedBuffer = data)
{
result = sendto(
handle,
pinnedBuffer + offset,
size,
SocketFlags.None,
remoteEndPoint.SocketAddr,
remoteEndPoint.SocketAddr.Length);
}
}
if ((SocketError)result == SocketError.SocketError)
{
throw new SocketException(Marshal.GetLastWin32Error());
}
#else
if (!socket.Poll(SocketSendPollTime, SelectMode.SelectWrite))
{
return(-1);
}
result = socket.SendTo(data, offset, size, SocketFlags.None, remoteEndPoint.EndPoint);
#endif
NetUtils.DebugWrite(ConsoleColor.Blue, "[S]Send packet to {0}, result: {1}", remoteEndPoint.EndPoint, result);
return(result);
}
catch (SocketException ex)
{
if (ex.SocketErrorCode == SocketError.NoBufferSpaceAvailable)
{
return(0);
}
if (ex.SocketErrorCode != SocketError.MessageSize)
{
NetUtils.DebugWriteError("[S]" + ex);
}
errorCode = (int)ex.SocketErrorCode;
return(-1);
}
catch (Exception ex)
{
NetUtils.DebugWriteError("[S]" + ex);
return(-1);
}
}