/// <summary>
/// Handles incoming messages.
/// </summary>
/// <param name="sender">The <see cref="IMessageConnection"/> instance from which the message originated.</param>
/// <param name="message">The message.</param>
public async void HandleMessageRead(object sender, byte[] message)
{
var connection = (IMessageConnection)sender;
var code = new MessageReader <MessageCode.Distributed>(message).ReadCode();
if (code != MessageCode.Distributed.SearchRequest && code != MessageCode.Distributed.ServerSearchRequest)
{
Diagnostic.Debug($"Distributed message received: {code} from {connection.Username} ({connection.IPEndPoint}) (id: {connection.Id})");
}
try
{
switch (code)
{
// if we are connected to a branch root, we get search requests with code DistributedServerSearchRequest. convert this
// message to a normal DistributedSearchRequest before forwarding. not sure if this is correct, but it would match the
// observed behavior. these messages may also be forwarded from the server message handler if we haven't connected to
// a distributed parent in a timely manner.
case MessageCode.Distributed.ServerSearchRequest:
var serverSearchRequest = DistributedServerSearchRequest.FromByteArray(message);
var forwardedMessage = new DistributedSearchRequest(serverSearchRequest.Username, serverSearchRequest.Token, serverSearchRequest.Query);
SoulseekClient.DistributedConnectionManager.BroadcastMessageAsync(forwardedMessage.ToByteArray()).Forget();
await TrySendSearchResults(serverSearchRequest.Username, serverSearchRequest.Token, serverSearchRequest.Query).ConfigureAwait(false);
break;
// if we are connected to anyone other than a branch root, we should get search requests with code SearchRequest.
// forward these requests as is.
case MessageCode.Distributed.SearchRequest:
var searchRequest = DistributedSearchRequest.FromByteArray(message);
SoulseekClient.DistributedConnectionManager.BroadcastMessageAsync(message).Forget();
await TrySendSearchResults(searchRequest.Username, searchRequest.Token, searchRequest.Query).ConfigureAwait(false);
break;
case MessageCode.Distributed.Ping:
Diagnostic.Debug($"PING?");
var pingResponse = new DistributedPingResponse(SoulseekClient.GetNextToken());
await connection.WriteAsync(pingResponse.ToByteArray()).ConfigureAwait(false);
Diagnostic.Debug($"PONG!");
break;
case MessageCode.Distributed.BranchLevel:
var branchLevel = DistributedBranchLevel.FromByteArray(message);
if ((connection.Username, connection.IPEndPoint) == SoulseekClient.DistributedConnectionManager.Parent)
{
SoulseekClient.DistributedConnectionManager.SetBranchLevel(branchLevel.Level);
}
break;
case MessageCode.Distributed.BranchRoot:
var branchRoot = DistributedBranchRoot.FromByteArray(message);
if ((connection.Username, connection.IPEndPoint) == SoulseekClient.DistributedConnectionManager.Parent)
{
SoulseekClient.DistributedConnectionManager.SetBranchRoot(branchRoot.Username);
}
break;
case MessageCode.Distributed.ChildDepth:
var childDepth = DistributedChildDepth.FromByteArray(message);
SoulseekClient.Waiter.Complete(new WaitKey(Constants.WaitKey.ChildDepthMessage, connection.Key), childDepth.Depth);
break;
default:
Diagnostic.Debug($"Unhandled distributed message: {code} from {connection.Username} ({connection.IPEndPoint}); {message.Length} bytes");
break;
}
}
catch (Exception ex)
{
Diagnostic.Warning($"Error handling distributed message: {code} from {connection.Username} ({connection.IPEndPoint}); {ex.Message}", ex);
}
}
