internal static void WriteDiscoveryResponse(NetworkAppConfig appConfig, NetOutgoingMessage message, GameInfo gameInfo, bool isFull, MemoryStream applicationData)
{
// START: Version safe data
// {
message.Write(appConfig.AppId);
message.Write(gameInfo.Name.FilterName());
message.Write((UInt16)(appConfig.ApplicationVersion));
message.WriteVariableUInt32((UInt32)appConfig.ApplicationSignature.Length);
message.Write(appConfig.ApplicationSignature);
// }
// END: Version safe data
message.Write(gameInfo.IsInternetGame);
message.Write(isFull);
message.WriteMemoryStreamAsByteArray(applicationData); // <- fill in for WriteByteArray
}
public P2PNetwork(NetworkAppConfig appConfig, NetworkLogHandler networkLogHandler = null, BadNetworkSimulation badNetworkSimulation = null)
{
if (appConfig == null)
{
throw new ArgumentNullException("appConfig");
}
this.appConfig = appConfig;
this.NetworkLogHandler = networkLogHandler;
Log("Configuration:");
Log(" AppId = " + appConfig.AppId);
Log(" Version = " + appConfig.ApplicationVersion);
Log(" Signature = " + BitConverter.ToString(appConfig.ApplicationSignature));
SetupSocket(badNetworkSimulation);
LocalisedDisconnectReason = null;
}
public static DiscoveredGame ReadFromDiscoveryResponse(NetworkAppConfig appConfig, NetIncomingMessage message)
{
try
{
// START: Version safe data
// {
var theirAppId = message.ReadString();
if (theirAppId != appConfig.AppId)
{
return(null); // Wrong application
}
var gameName = message.ReadString().FilterName();
var theirAppVersion = message.ReadUInt16();
var theirAppSignatureLength = (int)message.ReadVariableUInt32();
byte[] theirAppSignature;
if (theirAppSignatureLength < 0 ||
theirAppSignatureLength > NetworkAppConfig.ApplicationSignatureMaximumLength)
{
theirAppSignature = null;
}
else
{
theirAppSignature = message.ReadBytes(theirAppSignatureLength);
}
// }
// END: Version safe data
// Check for version mismatch
if (theirAppVersion != appConfig.ApplicationVersion || theirAppSignature == null ||
!appConfig.ApplicationSignature.SequenceEqual(theirAppSignature))
{
var gi = new GameInfo(gameName);
var dg = new DiscoveredGame(message);
dg.GameInfo = gi;
if (theirAppVersion < appConfig.ApplicationVersion)
{
dg.VersionMismatch = -1;
}
else if (theirAppVersion > appConfig.ApplicationVersion)
{
dg.VersionMismatch = 1;
}
else
{
dg.VersionMismatch = 0;
}
Debug.Assert(dg.VersionMismatch.HasValue);
return(dg);
}
// If we get here, all the versioning is correct:
{
var isInternetGame = message.ReadBoolean();
var gi = new GameInfo(gameName, isInternetGame,
false); // <- NOTE: we are assuming that the side-channel handles discovery
var dg = new DiscoveredGame(message);
dg.GameInfo = gi;
dg.IsFull = message.ReadBoolean();
dg.applicationData = message.ReadByteArray();
return(dg);
}
}
catch
{
return(null);
}
}
