/// <summary>
/// Handles the contents of a network message.
/// </summary>
/// <param name="server">A reference to the tcp server instance which owns the listener at which this request landed.</param>
/// <param name="incomingPacket">The packet to handle.</param>
/// <param name="client">A reference to the client from where this request originated from, for context.</param>
/// <returns>A collection of <see cref="IOutboundPacket"/>s that compose that synchronous response, if any.</returns>
public override IEnumerable <IOutboundPacket> HandleRequestPacket(ITcpServer server, IInboundPacket incomingPacket, IClient client)
{
server.ThrowIfNull(nameof(server));
incomingPacket.ThrowIfNull(nameof(incomingPacket));
client.ThrowIfNull(nameof(client));
if (!(incomingPacket is IGameLogInInfo loginInfo))
{
this.Logger.LogError($"Expected packet info of type {nameof(IGameLogInInfo)} but got {incomingPacket.GetType().Name}.");
return(null);
}
if (!(client.Connection is ISocketConnection socketConnection))
{
this.Logger.LogError($"Expected a {nameof(ISocketConnection)} got a {client.Connection.GetType().Name}.");
return(null);
}
// Associate the xTea key to allow future validate packets from this connection.
socketConnection.SetupAuthenticationKey(loginInfo.XteaKey);
// TODO: possibly a friendly name conversion here. Also, the actual values might change per version, so this really should be set by the packet reader.
client.Type = Enum.IsDefined(typeof(AgentType), loginInfo.ClientOs) ? (AgentType)loginInfo.ClientOs : AgentType.Windows;
client.Version = loginInfo.ClientVersion.ToString();
if (loginInfo.ClientVersion != server.Options.SupportedClientVersion.Numeric)
{
this.Logger.LogInformation($"Client attempted to connect with version: {loginInfo.ClientVersion}, OS: {loginInfo.ClientOs}. Expected version: {server.Options.SupportedClientVersion.Numeric}.");
// TODO: hardcoded messages.
return(new GameServerDisconnectPacket($"You need client version {server.Options.SupportedClientVersion.Description} to connect to this server.").YieldSingleItem());
}
var(playerId, error) = server.RequestPlayerLogIn(loginInfo.AccountIdentifier, loginInfo.Password, loginInfo.CharacterName);
if (!string.IsNullOrWhiteSpace(error))
{
return(new GatewayServerDisconnectPacket(error).YieldSingleItem());
}
client.PlayerId = playerId;
this.clientsManager.Register(client);
// We don't return anything synchronously in this particular case, the game will send out the login notifications when they are ready.
return(null);
}
