private int HandleSendUnsequenced(Peer peer, Protocol.Send.Unsequenced command, Buffer buffer)
{
if (command.ChannelID >= peer.ChannelCount)
{
return(-1);
}
if (peer.State != PeerState.CONNECTED && peer.State != PeerState.DISCONNECT_LATER)
{
return(-1);
}
if (command.DataLength > buffer.BytesLeft)
{
return(-1);
}
uint unsequencedGroup = command.UnsequencedGroup;
uint index = unsequencedGroup % Peer.UNSEQUENCED_WINDOW_SIZE;
if (unsequencedGroup < peer.IncomingUnsequencedGroup)
{
unsequencedGroup += 0x10000u;
}
if (unsequencedGroup >= (uint)peer.IncomingUnsequencedGroup + Peer.FREE_UNSEQUENCED_WINDOWS * Peer.UNSEQUENCED_WINDOW_SIZE)
{
return(0);
}
unsequencedGroup &= 0xFFFFu;
if (unsequencedGroup - index != peer.IncomingUnsequencedGroup)
{
peer.IncomingUnsequencedGroup = (ushort)(unsequencedGroup - index);
peer.UnsequencedWindow.SetAll(false);
}
else if (peer.UnsequencedWindow[(int)index])
{
return(0);
}
var packet = new Packet(command.DataLength, PacketFlags.UNSEQUENCED);
buffer.ReadBytes(packet.Data, 0, command.DataLength);
if (peer.QueueIncomingCommand(command, packet, 0) == null)
{
return(-1);
}
peer.UnsequencedWindow[(int)index] = true;
return(0);
}
public int Send(byte channelID, Packet packet)
{
if (State != PeerState.CONNECTED || channelID >= ChannelCount)
{
return(-1);
}
var channel = Channels[channelID];
uint fragmentLength = MTU - Host.Version.MaxHeaderSizeSend - Protocol.Send.Fragment.SIZE;
if (packet.DataLength > fragmentLength)
{
ushort startSequenceNumber = (ushort)(channel.OutgoingReliableSequenceNumber + 1);
uint fragmentCount = (packet.DataLength + fragmentLength - 1u) / fragmentLength;
uint fragmentNumber = 0;
uint fragmentOffset = 0;
for (; fragmentOffset < packet.DataLength;
fragmentOffset += fragmentLength, fragmentNumber++)
{
if (packet.DataLength - fragmentOffset < fragmentLength)
{
fragmentLength = packet.DataLength - fragmentOffset;
}
var fragment = new OutgoingCommand
{
FragmentOffset = fragmentOffset,
FragmentLength = (ushort)fragmentLength,
Packet = packet,
Command = new Protocol.Send.Fragment
{
Flags = ProtocolFlag.ACKNOWLEDGE,
ChannelID = channelID,
StartSequenceNumber = startSequenceNumber,
DataLength = (ushort)fragmentLength,
FragmentCount = fragmentCount,
FragmentNumber = fragmentNumber,
TotalLength = packet.DataLength,
FragmentOffset = fragmentOffset,
}
};
SetupOutgoingCommand(fragment);
}
return(0);
}
Protocol command;
if (packet.Flags.HasFlag(PacketFlags.RELIABLE))
{
command = new Protocol.Send.Reliable
{
ChannelID = channelID,
Flags = ProtocolFlag.ACKNOWLEDGE,
DataLength = (ushort)packet.DataLength,
};
}
else if (packet.Flags.HasFlag(PacketFlags.UNSEQUENCED))
{
command = new Protocol.Send.Unsequenced
{
ChannelID = channelID,
Flags = ProtocolFlag.UNSEQUENCED,
UnsequencedGroup = (ushort)(OutgoingUnsequencedGroup + 1),
DataLength = (ushort)packet.DataLength,
};
}
else if (channel.OutgoingReliableSequenceNumber >= 0xFFFFu)
{
command = new Protocol.Send.Reliable
{
ChannelID = channelID,
Flags = ProtocolFlag.ACKNOWLEDGE,
DataLength = (ushort)packet.DataLength,
};
}
else
{
command = new Protocol.Send.Unreliable
{
ChannelID = channelID,
UnreliableSequenceNumber = (ushort)(channel.OutgoingUnreliableSequenceNumber + 1),
DataLength = (ushort)packet.DataLength,
};
}
if (QueueOutgoingCommand(command, packet, 0, (ushort)packet.DataLength) == null)
{
return(-1);
}
return(0);
}