/// <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 IGatewayLoginInfo accountLoginInfo))
{
this.Logger.LogError($"Expected packet info of type {nameof(IGatewayLoginInfo)} but got {incomingPacket.GetType().Name}.");
return(null);
}
if (!(client.Connection is ISocketConnection socketConnection))
{
this.Logger.LogError($"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(accountLoginInfo.XteaKey);
if (accountLoginInfo.ClientVersion != server.Options.SupportedClientVersion.Numeric)
{
this.Logger.LogInformation($"Client attempted to connect with version: {accountLoginInfo.ClientVersion}, OS: {accountLoginInfo.ClientOs}. Expected version: {server.Options.SupportedClientVersion.Numeric}.");
// TODO: hardcoded messages.
return(new GatewayServerDisconnectPacket($"You need client version {server.Options.SupportedClientVersion.Description} to connect to this server.").YieldSingleItem());
}
var(characters, premDays, error) = server.DoAccountLogin(accountLoginInfo.AccountName, accountLoginInfo.Password);
if (!string.IsNullOrWhiteSpace(error))
{
return(new GatewayServerDisconnectPacket(error).YieldSingleItem());
}
return(new IOutboundPacket[]
{
new MessageOfTheDayPacket(server.InformationalMessage),
new CharacterListPacket(characters, (ushort)premDays),
});
}