public Peer Connect(Address address, uint channelCount = 0)
{
channelCount = channelCount == 0 ? ChannelLimit : channelCount;
channelCount = Utils.Clamp(channelCount, MINIMUM_CHANNEL_COUNT, ChannelLimit);
var currentPeer = Array.Find(Peers, (p) => p.State == PeerState.DISCONNECTED);
if (currentPeer == null)
{
return(null);
}
currentPeer.ResetChannels();
currentPeer.ChannelCount = channelCount;
currentPeer.State = PeerState.CONNECTING;
currentPeer.Address = address;
currentPeer.SessionID = _nextSessionID++;
if (Version.MaxPeerID == 0x7Fu)
{
currentPeer.SessionID &= 0xFFu;
}
if (OutgoingBandwidth == 0)
{
currentPeer.WindowSize = MAXIMUM_WINDOW_SIZE;
}
else
{
currentPeer.WindowSize = (OutgoingBandwidth / Peer.WINDOW_SIZE_SCALE) * MINIMUM_WINDOW_SIZE;
}
currentPeer.WindowSize = Utils.Clamp(currentPeer.WindowSize, MINIMUM_WINDOW_SIZE, MAXIMUM_WINDOW_SIZE);
var command = new Protocol.Connect
{
Flags = ProtocolFlag.ACKNOWLEDGE,
ChannelID = 0xFF,
OutgoingPeerID = currentPeer.IncomingPeerID,
MTU = currentPeer.MTU,
WindowSize = currentPeer.WindowSize,
ChannelCount = channelCount,
IncomingBandwidth = IncomingBandwidth,
OutgoingBandwidth = OutgoingBandwidth,
PacketThrottleInterval = currentPeer.PacketThrottleInterval,
PacketThrottleAcceleration = currentPeer.PacketThrottleAcceleration,
PacketThrottleDeceleration = currentPeer.PacketThrottleDeceleration,
SessionID = currentPeer.SessionID,
};
currentPeer.QueueOutgoingCommand(command, null, 0, 0);
return(currentPeer);
}
private int HandleConnect(Address receivedAddress, ref Peer result, Protocol.Connect command)
{
uint channelCount = command.ChannelCount;
if (channelCount < MINIMUM_CHANNEL_COUNT || channelCount > MAXIMUM_CHANNEL_COUNT)
{
return(-1);
}
foreach (var peer in Peers)
{
if (peer.State != PeerState.DISCONNECTED &&
peer.Address.Host == receivedAddress.Host &&
peer.Address.Port == receivedAddress.Port &&
peer.SessionID == command.SessionID)
{
return(-1);
}
}
var currentPeer = Array.Find(Peers, (peer) => peer.State == PeerState.DISCONNECTED);
if (currentPeer == null)
{
return(-1);
}
if (channelCount > ChannelLimit)
{
channelCount = ChannelLimit;
}
currentPeer.ResetChannels();
currentPeer.ChannelCount = channelCount;
currentPeer.State = PeerState.ACKNOWLEDGING_CONNECT;
currentPeer.SessionID = command.SessionID;
currentPeer.Address = receivedAddress;
currentPeer.OutgoingPeerID = command.OutgoingPeerID;
currentPeer.IncomingBandwidth = command.IncomingBandwidth;
currentPeer.OutgoingBandwidth = command.OutgoingBandwidth;
currentPeer.PacketThrottleInterval = command.PacketThrottleInterval;
currentPeer.PacketThrottleAcceleration = command.PacketThrottleAcceleration;
currentPeer.PacketThrottleDeceleration = command.PacketThrottleDeceleration;
currentPeer.MTU = Utils.Clamp(command.MTU, MINIMUM_MTU, MAXIMUM_MTU);
if (OutgoingBandwidth == 0 &&
currentPeer.IncomingBandwidth == 0)
{
currentPeer.WindowSize = MAXIMUM_WINDOW_SIZE;
}
else if (OutgoingBandwidth == 0 ||
currentPeer.IncomingBandwidth == 0)
{
currentPeer.WindowSize = (Math.Max(OutgoingBandwidth, currentPeer.IncomingBandwidth) / Peer.WINDOW_SIZE_SCALE) * MINIMUM_WINDOW_SIZE;
}
else
{
currentPeer.WindowSize = (Math.Min(OutgoingBandwidth, currentPeer.IncomingBandwidth) / Peer.WINDOW_SIZE_SCALE) * MINIMUM_WINDOW_SIZE;
}
currentPeer.WindowSize = Utils.Clamp(currentPeer.WindowSize, MINIMUM_WINDOW_SIZE, MAXIMUM_WINDOW_SIZE);
uint windowSize = IncomingBandwidth == 0 ? MAXIMUM_WINDOW_SIZE : (IncomingBandwidth / Peer.WINDOW_SIZE_SCALE) * MINIMUM_WINDOW_SIZE;
if (windowSize > command.WindowSize)
{
windowSize = command.WindowSize;
}
windowSize = Utils.Clamp(windowSize, MINIMUM_WINDOW_SIZE, MAXIMUM_WINDOW_SIZE);
var verifyCommand = new Protocol.VerifyConnect
{
Flags = ProtocolFlag.ACKNOWLEDGE,
ChannelID = 0xFF,
OutgoingPeerID = currentPeer.IncomingPeerID,
MTU = currentPeer.MTU,
WindowSize = windowSize,
ChannelCount = channelCount,
IncomingBandwidth = IncomingBandwidth,
OutgoingBandwidth = OutgoingBandwidth,
PacketThrottleInterval = currentPeer.PacketThrottleInterval,
PacketThrottleAcceleration = currentPeer.PacketThrottleAcceleration,
PacketThrottleDeceleration = currentPeer.PacketThrottleDeceleration,
};
currentPeer.QueueOutgoingCommand(verifyCommand, null, 0, 0);
result = currentPeer;
return(0);
}