internal RemotePeer(NetConnection connection, PeerInfo peerInfo)
{
PeerInfo = peerInfo;
if (connection != null)
{
AddConnection(connection);
}
}
private void HandleConnection(NetConnection connection)
{
// Read hail message:
IPEndPoint internalEndPoint;
ulong sideChannelId;
int sideChannelToken;
string requestedName;
byte[] remotePlayerData = null;
try
{
UInt16 theirAppVersion = connection.RemoteHailMessage.ReadUInt16();
if (theirAppVersion != owner.appConfig.ApplicationVersion)
{
owner.Log("Disconnected client with wrong application version");
connection.Disconnect(DisconnectStrings.BadGameVersion);
return;
}
int theirAppSignatureLength = (int)connection.RemoteHailMessage.ReadVariableUInt32();
byte[] theirAppSignature;
if (theirAppSignatureLength < 0 || theirAppSignatureLength > NetworkAppConfig.ApplicationSignatureMaximumLength)
{
theirAppSignature = null;
}
else
{
theirAppSignature = connection.RemoteHailMessage.ReadBytes(theirAppSignatureLength);
}
if (theirAppSignature == null || !owner.appConfig.ApplicationSignature.SequenceEqual(theirAppSignature))
{
owner.Log("Disconnected client with wrong application signature");
connection.Disconnect(DisconnectStrings.BadGameVersion);
return;
}
internalEndPoint = connection.RemoteHailMessage.ReadIPEndPoint();
sideChannelId = connection.RemoteHailMessage.ReadUInt64();
sideChannelToken = connection.RemoteHailMessage.ReadInt32();
requestedName = connection.RemoteHailMessage.ReadString();
remotePlayerData = connection.RemoteHailMessage.ReadByteArray();
}
catch
{
owner.UnconnectedProtocolError("Bad hail message");
connection.Disconnect(DisconnectStrings.BadHailMessage);
return;
}
if (owner.GameInfo.SideChannelAuth)
{
int expectedToken;
if (sideChannelToken == 0 || authTokens == null || !authTokens.TryGetValue(sideChannelId, out expectedToken) || expectedToken != sideChannelToken)
{
owner.UnconnectedProtocolError("Bad side-channel authentication");
connection.Disconnect(DisconnectStrings.BadSideChannelAuth);
}
}
requestedName = requestedName.FilterNameNoDuplicates(locallyConnected, owner.LocalPeerInfo.PlayerName);
// Check whether the server is full:
// (Could possibly handle this as Approve/Deny, but would then have to track slots for pending connections.)
if (IsFull)
{
owner.Log("Rejecting incoming connection (player name: " + requestedName + "): game is full");
connection.Disconnect(DisconnectStrings.GameFull);
return;
}
// Setup remote peer:
PeerInfo peerInfo = new PeerInfo()
{
ConnectionId = nextConnectionId++,
PlayerName = requestedName,
PlayerData = remotePlayerData,
InputAssignment = AssignInput(),
InternalEndPoint = internalEndPoint,
ExternalEndPoint = connection.RemoteEndPoint,
SideChannelId = sideChannelId,
IsApplicationConnected = false,
IsServer = false,
};
RemotePeer remotePeer = new RemotePeer(connection, peerInfo);
owner.Log("New connection: " + peerInfo.ToString());
// Setup connection tokens:
int[] connectionTokens = new int[locallyConnected.Count];
for (int i = 0; i < connectionTokens.Length; i++)
{
connectionTokens[i] = random.Next();
}
// Send info to joining peer:
{
var message = NetPeer.CreateMessage();
message.Write(P2PServerMessage.NetworkStartInfo);
owner.GameInfo.WriteTo(message);
peerInfo.WriteTo(message, true); // Send their peer info (except: they already have their own playerData)
owner.LocalPeerInfo.WriteTo(message); // Send our peer info
// Write out a list of who to connect to:
Debug.Assert(locallyConnected.Count < byte.MaxValue);
message.Write((byte)(locallyConnected.Count));
for (int i = 0; i < locallyConnected.Count; i++)
{
(locallyConnected[i].Tag as RemotePeer).PeerInfo.WriteTo(message);
message.Write(connectionTokens[i]);
}
remotePeer.Connection.SendMessage(message, NetDeliveryMethod.ReliableOrdered, 0);
}
// Send connect instructions to other peers:
for (int i = 0; i < locallyConnected.Count; i++)
{
var message = NetPeer.CreateMessage();
message.Write(P2PServerMessage.PeerJoinedNetwork);
peerInfo.WriteTo(message);
message.Write(connectionTokens[i]);
locallyConnected[i].SendMessage(message, NetDeliveryMethod.ReliableOrdered, 0);
}
// Add new connection to the local connection list:
locallyConnected.Add(connection);
// Start waiting for this new client to connect to the full network:
StartPendingConnection(remotePeer);
// Although the first connection won't need to wait:
if (locallyConnected.Count == 1)
{
ReadyCheckAll();
}
}
// Special use (for setting the server's peer info, and for host migration)
internal void SetPeerInfo(PeerInfo peerInfo)
{
PeerInfo = peerInfo;
}
// Special use (for setting the server's peer info, and for host migration)
internal void SetPeerInfo(PeerInfo peerInfo)
{
this.PeerInfo = peerInfo;
}
