/// <summary>
/// Returns the most appropriate handler for the specified packet type.
/// </summary>
/// <param name="packet">The packet to select the handler for.</param>
/// <returns>An instance of an <see cref="ITcpRequestHandler"/> implementaion.</returns>
public ITcpRequestHandler SelectForPacket(IInboundPacket packet)
{
packet.ThrowIfNull(nameof(packet));
var packetType = packet.GetType();
if (this.handlersMap.TryGetValue(packetType, out ITcpRequestHandler handler))
{
return(handler);
}
foreach (var iType in packetType.GetInterfaces())
{
if (this.handlersMap.TryGetValue(iType, out handler))
{
return(handler);
}
}
this.logger.LogWarning($"No handler found for type {packetType}.");
return(null);
}
/// <summary>
/// Handles the contents of a network message.
/// </summary>
/// <param name="server">A reference to the tcp server instance which owns the listener at which this request landed.</param>
/// <param name="incomingPacket">The packet to handle.</param>
/// <param name="client">A reference to the client from where this request originated from, for context.</param>
/// <returns>A collection of <see cref="IOutboundPacket"/>s that compose that synchronous response, if any.</returns>
public override IEnumerable <IOutboundPacket> HandleRequestPacket(ITcpServer server, IInboundPacket incomingPacket, IClient client)
{
server.ThrowIfNull(nameof(server));
incomingPacket.ThrowIfNull(nameof(incomingPacket));
client.ThrowIfNull(nameof(client));
if (!(incomingPacket is IFollowInfo followInfo))
{
this.Logger.LogError($"Expected packet info of type {nameof(IFollowInfo)} but got {incomingPacket.GetType().Name}.");
return(null);
}
// First stop attacking if we are.
server.RequestToAttackCreatureAsync(client.PlayerId);
server.RequestToFollowCreatureAsync(client.PlayerId, followInfo.TargetCreatureId);
return(null);
}
/// <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 ISpeechInfo speechInfo))
{
this.Logger.LogError($"Expected packet info of type {nameof(ISpeechInfo)} but got {incomingPacket.GetType().Name}.");
return(null);
}
server.RequestSendMessageAsync(client.PlayerId, speechInfo.SpeechType, speechInfo.ChannelType, speechInfo.Content, speechInfo.Receiver);
return(null);
}
/// <summary>
/// Handles the contents of a network message.
/// </summary>
/// <param name="server">A reference to the tcp server instance which owns the listener at which this request landed.</param>
/// <param name="incomingPacket">The packet to handle.</param>
/// <param name="client">A reference to the client from where this request originated from, for context.</param>
/// <returns>A collection of <see cref="IOutboundPacket"/>s that compose that synchronous response, if any.</returns>
public override IEnumerable <IOutboundPacket> HandleRequestPacket(ITcpServer server, IInboundPacket incomingPacket, IClient client)
{
server.ThrowIfNull(nameof(server));
incomingPacket.ThrowIfNull(nameof(incomingPacket));
client.ThrowIfNull(nameof(client));
if (!(incomingPacket is IGameLogInInfo loginInfo))
{
this.Logger.LogError($"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($"You need client version {server.Options.SupportedClientVersion.Description} to connect to this server.").YieldSingleItem());
}
var(playerId, error) = server.RequestPlayerLogIn(loginInfo.AccountIdentifier, loginInfo.Password, loginInfo.CharacterName);
if (!string.IsNullOrWhiteSpace(error))
{
return(new GatewayServerDisconnectPacket(error).YieldSingleItem());
}
client.PlayerId = playerId;
this.clientsManager.Register(client);
// We don't return anything synchronously in this particular case, the game will send out the login notifications when they are ready.
return(null);
}
/// <summary>
/// Handles the contents of a network message.
/// </summary>
/// <param name="server">A reference to the tcp server instance which owns the listener at which this request landed.</param>
/// <param name="incomingPacket">The packet to handle.</param>
/// <param name="client">A reference to the client from where this request originated from, for context.</param>
/// <returns>A collection of <see cref="IOutboundPacket"/>s that compose that synchronous response, if any.</returns>
public override IEnumerable <IOutboundPacket> HandleRequestPacket(ITcpServer server, IInboundPacket incomingPacket, IClient client)
{
server.ThrowIfNull(nameof(server));
incomingPacket.ThrowIfNull(nameof(incomingPacket));
client.ThrowIfNull(nameof(client));
if (!(incomingPacket is IModesInfo modesInfo))
{
this.Logger.LogError($"Expected packet info of type {nameof(IModesInfo)} but got {incomingPacket.GetType().Name}.");
return(null);
}
server.RequestToUpdateModesAsync(client.PlayerId, modesInfo.FightMode, modesInfo.ChaseMode, modesInfo.SafeModeOn);
return(null);
}
/// <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 IBytesInfo debugInfo))
{
this.Logger.LogError($"Expected packet info of type {nameof(IBytesInfo)} but got {incomingPacket.GetType().Name}.");
return(null);
}
var sb = new StringBuilder();
foreach (var b in debugInfo.Bytes)
{
sb.AppendFormat("{0:x2} ", b);
}
this.Logger.LogInformation($"Default handler drained packet with content:\n\n{sb}");
return(null);
}
/// <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 ILookAtInfo lookAtInfo))
{
this.Logger.LogError($"Expected packet info of type {nameof(ILookAtInfo)} but got {incomingPacket.GetType().Name}.");
return(null);
}
server.RequestTextDescriptionAtAsync(client.PlayerId, lookAtInfo.Location, lookAtInfo.StackPosition, lookAtInfo.ThingId);
return(null);
}
/// <summary>
/// Handles the contents of a network message.
/// </summary>
/// <param name="server">A reference to the tcp server instance which owns the listener at which this request landed.</param>
/// <param name="incomingPacket">The packet to handle.</param>
/// <param name="client">A reference to the client from where this request originated from, for context.</param>
/// <returns>A collection of <see cref="IOutboundPacket"/>s that compose that synchronous response, if any.</returns>
public override IEnumerable <IOutboundPacket> HandleRequestPacket(ITcpServer server, IInboundPacket incomingPacket, IClient client)
{
server.ThrowIfNull(nameof(server));
incomingPacket.ThrowIfNull(nameof(incomingPacket));
client.ThrowIfNull(nameof(client));
if (!(incomingPacket is IAttackInfo attackInfo))
{
this.Logger.LogError($"Expected packet info of type {nameof(IAttackInfo)} but got {incomingPacket.GetType().Name}.");
return(null);
}
// First stop following (formally) if we are.
server.RequestToFollowCreatureAsync(client.PlayerId);
// And then start attacking. Game will handle if that implicitly means follow the target of the attack.
server.RequestToAttackCreatureAsync(client.PlayerId, attackInfo.TargetCreatureId);
return(null);
}
/// <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 IWalkOnDemandInfo walkOnDemandInfo))
{
this.Logger.LogError($"Expected packet info of type {nameof(IWalkOnDemandInfo)} but got {incomingPacket.GetType().Name}.");
return(null);
}
server.RequestToUpdateWalkPlanAsync(client.PlayerId, new[] { walkOnDemandInfo.Direction });
return(null);
}
/// <summary>
/// Handles the contents of a network message.
/// </summary>
/// <param name="server">A reference to the tcp server instance which owns the listener at which this request landed.</param>
/// <param name="incomingPacket">The packet to handle.</param>
/// <param name="client">A reference to the client from where this request originated from, for context.</param>
/// <returns>A collection of <see cref="IOutboundPacket"/>s that compose that synchronous response, if any.</returns>
public override IEnumerable <IOutboundPacket> HandleRequestPacket(ITcpServer server, IInboundPacket incomingPacket, IClient client)
{
server.ThrowIfNull(nameof(server));
incomingPacket.ThrowIfNull(nameof(incomingPacket));
client.ThrowIfNull(nameof(client));
if (!(incomingPacket is ITurnOnDemandInfo turnOnDemandInfo))
{
this.Logger.LogError($"Expected packet info of type {nameof(ITurnOnDemandInfo)} but got {incomingPacket.GetType().Name}.");
return(null);
}
// TODO: cancel other pending actions.
server.RequestToTurnCreatureAsync(client.PlayerId, turnOnDemandInfo.Direction);
return(null);
}
/// <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 IActionWithoutContentInfo actionInfo))
{
this.Logger.LogError($"Expected packet info of type {nameof(IActionWithoutContentInfo)} but got {incomingPacket.GetType().Name}.");
return(null);
}
switch (actionInfo.Action)
{
case InboundPacketType.AutoMoveCancel:
server.RequestToCancelPlayerOperationsAsync(client.PlayerId, OperationCategory.Movement);
break;
case InboundPacketType.HeartbeatResponse:
// NO-OP.
break;
case InboundPacketType.Heartbeat:
server.SendHeartbeatResponseAsync(client);
break;
case InboundPacketType.LogOut:
server.RequestPlayerLogOutAsync(client.PlayerId);
break;
case InboundPacketType.StartOutfitChange:
// this.Game.RequestPlayerOutfitChange(client.PlayerId);
break;
case InboundPacketType.StopAllActions:
server.RequestToCancelPlayerOperationsAsync(client.PlayerId);
break;
}
return(null);
}
/// <summary> /// Handles the contents of a request packet. /// </summary> /// <param name="tcpServerInstance">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 abstract IEnumerable <IOutboundPacket> HandleRequestPacket(ITcpServer tcpServerInstance, IInboundPacket incomingPacket, IClient client);
/// <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),
});
}
