public void Parse_Returns_Expected_Data(string username, int token, byte freeUploadSlots, int uploadSpeed, long queueLength)
{
var msg = new MessageBuilder()
.WriteCode(MessageCode.Peer.SearchResponse)
.WriteString(username)
.WriteInteger(token)
.WriteInteger(1) // file count
.WriteByte(0x2) // code
.WriteString("filename") // filename
.WriteLong(3) // size
.WriteString("ext") // extension
.WriteInteger(1) // attribute count
.WriteInteger((int)FileAttributeType.BitDepth) // attribute[0].type
.WriteInteger(4) // attribute[0].value
.WriteByte(freeUploadSlots)
.WriteInteger(uploadSpeed)
.WriteLong(queueLength)
.WriteBytes(new byte[4]) // unknown 4 bytes
.Compress()
.Build();
var r = SearchResponseSlim.FromByteArray(msg);
Assert.Equal(username, r.Username);
Assert.Equal(token, r.Token);
Assert.Equal(1, r.FileCount);
Assert.Equal(freeUploadSlots, r.FreeUploadSlots);
Assert.Equal(uploadSpeed, r.UploadSpeed);
Assert.Equal(queueLength, r.QueueLength);
// assure the messagereader has been rewound to the start of the file list
// position is equal to 4 byte username length + username + 4 byte token + 4 byte file count
Assert.Equal(4 + username.Length + 4 + 4, r.MessageReader.Position);
}
public void Parse_Throws_MessageException_On_Code_Mismatch()
{
var msg = new MessageBuilder()
.WriteCode(MessageCode.Peer.BrowseRequest)
.Build();
var ex = Record.Exception(() => SearchResponseSlim.FromByteArray(msg));
Assert.NotNull(ex);
Assert.IsType <MessageException>(ex);
}
public void Parse_Throws_MessageReadException_On_Missing_Data()
{
var msg = new MessageBuilder()
.WriteCode(MessageCode.Peer.SearchResponse)
.WriteString("foo")
.Compress()
.Build();
var ex = Record.Exception(() => SearchResponseSlim.FromByteArray(msg));
Assert.NotNull(ex);
Assert.IsType <MessageReadException>(ex);
}
public void Parse_Throws_MessageCompressionException_On_Uncompressed_Payload()
{
var msg = new MessageBuilder()
.WriteCode(MessageCode.Peer.SearchResponse)
.WriteBytes(new byte[] { 0x0, 0x1, 0x2, 0x3 })
.Build();
var ex = Record.Exception(() => SearchResponseSlim.FromByteArray(msg));
Assert.NotNull(ex);
Assert.IsType <MessageCompressionException>(ex);
Assert.IsType <ZStreamException>(ex.InnerException);
}
/// <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.Peer>(message).ReadCode();
Diagnostic.Debug($"Peer message received: {code} from {connection.Username} ({connection.IPEndPoint}) (id: {connection.Id})");
try
{
switch (code)
{
case MessageCode.Peer.SearchResponse:
var searchResponse = SearchResponseSlim.FromByteArray(message);
if (SoulseekClient.Searches.TryGetValue(searchResponse.Token, out var search))
{
search.TryAddResponse(searchResponse);
}
break;
case MessageCode.Peer.BrowseResponse:
var browseWaitKey = new WaitKey(MessageCode.Peer.BrowseResponse, connection.Username);
try
{
SoulseekClient.Waiter.Complete(browseWaitKey, BrowseResponse.FromByteArray(message));
}
catch (Exception ex)
{
SoulseekClient.Waiter.Throw(browseWaitKey, new MessageReadException("The peer returned an invalid browse response", ex));
throw;
}
break;
case MessageCode.Peer.InfoRequest:
UserInfo outgoingInfo;
try
{
outgoingInfo = await SoulseekClient.Options
.UserInfoResponseResolver(connection.Username, connection.IPEndPoint).ConfigureAwait(false);
}
catch (Exception ex)
{
outgoingInfo = await new SoulseekClientOptions()
.UserInfoResponseResolver(connection.Username, connection.IPEndPoint).ConfigureAwait(false);
Diagnostic.Warning($"Failed to resolve UserInfoResponse: {ex.Message}", ex);
}
await connection.WriteAsync(outgoingInfo.ToByteArray()).ConfigureAwait(false);
break;
case MessageCode.Peer.BrowseRequest:
IEnumerable <Directory> browseResponse;
try
{
browseResponse = await SoulseekClient.Options.BrowseResponseResolver(connection.Username, connection.IPEndPoint).ConfigureAwait(false);
}
catch (Exception ex)
{
browseResponse = await new SoulseekClientOptions()
.BrowseResponseResolver(connection.Username, connection.IPEndPoint).ConfigureAwait(false);
Diagnostic.Warning($"Failed to resolve BrowseResponse: {ex.Message}", ex);
}
var browseResponseMessage = new BrowseResponse(browseResponse.Count(), browseResponse);
await connection.WriteAsync(browseResponseMessage.ToByteArray()).ConfigureAwait(false);
break;
case MessageCode.Peer.InfoResponse:
var incomingInfo = UserInfoResponse.FromByteArray(message);
SoulseekClient.Waiter.Complete(new WaitKey(MessageCode.Peer.InfoResponse, connection.Username), incomingInfo);
break;
case MessageCode.Peer.TransferResponse:
var transferResponse = TransferResponse.FromByteArray(message);
SoulseekClient.Waiter.Complete(new WaitKey(MessageCode.Peer.TransferResponse, connection.Username, transferResponse.Token), transferResponse);
break;
case MessageCode.Peer.QueueDownload:
var queueDownloadRequest = EnqueueDownloadRequest.FromByteArray(message);
var(queueRejected, queueRejectionMessage) =
await TryEnqueueDownloadAsync(connection.Username, connection.IPEndPoint, queueDownloadRequest.Filename).ConfigureAwait(false);
if (queueRejected)
{
await connection.WriteAsync(new EnqueueFailedResponse(queueDownloadRequest.Filename, queueRejectionMessage).ToByteArray()).ConfigureAwait(false);
}
else
{
await TrySendPlaceInQueueAsync(connection, queueDownloadRequest.Filename).ConfigureAwait(false);
}
break;
case MessageCode.Peer.TransferRequest:
var transferRequest = TransferRequest.FromByteArray(message);
if (transferRequest.Direction == TransferDirection.Upload)
{
if (!SoulseekClient.Downloads.IsEmpty && SoulseekClient.Downloads.Values.Any(d => d.Username == connection.Username && d.Filename == transferRequest.Filename))
{
SoulseekClient.Waiter.Complete(new WaitKey(MessageCode.Peer.TransferRequest, connection.Username, transferRequest.Filename), transferRequest);
}
else
{
// reject the transfer with an empty reason. it was probably cancelled, but we can't be sure.
await connection.WriteAsync(new TransferResponse(transferRequest.Token, string.Empty).ToByteArray()).ConfigureAwait(false);
}
}
else
{
var(transferRejected, transferRejectionMessage) = await TryEnqueueDownloadAsync(connection.Username, connection.IPEndPoint, transferRequest.Filename).ConfigureAwait(false);
if (transferRejected)
{
await connection.WriteAsync(new TransferResponse(transferRequest.Token, transferRejectionMessage).ToByteArray()).ConfigureAwait(false);
await connection.WriteAsync(new EnqueueFailedResponse(transferRequest.Filename, transferRejectionMessage).ToByteArray()).ConfigureAwait(false);
}
else
{
await connection.WriteAsync(new TransferResponse(transferRequest.Token, "Queued.").ToByteArray()).ConfigureAwait(false);
await TrySendPlaceInQueueAsync(connection, transferRequest.Filename).ConfigureAwait(false);
}
}
break;
case MessageCode.Peer.QueueFailed:
var queueFailedResponse = EnqueueFailedResponse.FromByteArray(message);
SoulseekClient.Waiter.Throw(new WaitKey(MessageCode.Peer.TransferRequest, connection.Username, queueFailedResponse.Filename), new TransferRejectedException(queueFailedResponse.Message));
break;
case MessageCode.Peer.PlaceInQueueResponse:
var placeInQueueResponse = PlaceInQueueResponse.FromByteArray(message);
SoulseekClient.Waiter.Complete(new WaitKey(MessageCode.Peer.PlaceInQueueResponse, connection.Username, placeInQueueResponse.Filename), placeInQueueResponse);
break;
case MessageCode.Peer.PlaceInQueueRequest:
var placeInQueueRequest = PlaceInQueueRequest.FromByteArray(message);
await TrySendPlaceInQueueAsync(connection, placeInQueueRequest.Filename).ConfigureAwait(false);
break;
case MessageCode.Peer.UploadFailed:
var uploadFailedResponse = UploadFailed.FromByteArray(message);
var msg = $"Download of {uploadFailedResponse.Filename} reported as failed by {connection.Username}";
var download = SoulseekClient.Downloads.Values.FirstOrDefault(d => d.Username == connection.Username && d.Filename == uploadFailedResponse.Filename);
if (download != null)
{
SoulseekClient.Waiter.Throw(new WaitKey(MessageCode.Peer.TransferRequest, download.Username, download.Filename), new TransferException(msg));
SoulseekClient.Waiter.Throw(download.WaitKey, new TransferException(msg));
}
Diagnostic.Debug(msg);
break;
default:
Diagnostic.Debug($"Unhandled peer message: {code} from {connection.Username} ({connection.IPEndPoint}); {message.Length} bytes");
break;
}
}
catch (Exception ex)
{
Diagnostic.Warning($"Error handling peer message: {code} from {connection.Username} ({connection.IPEndPoint}); {ex.Message}", ex);
}
}