SCTP not enabled by remote Transport Error

mediasoup libraries
1

Hey,

I’m trying to get DataChannels working here. On the server I create two transports 1 send/1 receive. Like so:

await this._mediasoupRouter.createWebRtcTransport(
          {
            listenIps: webrtcTransportConfig.getListenIps(),
            enableUdp: !forceTcp,
            enableTcp: true,
            enableSctp: true,
            numSctpStreams: sctpCapabilities.numStreams,
            preferUdp: true,
            initialAvailableOutgoingBitrate,
            minimumAvailableOutgoingBitrate,
            appData: { producing, consuming, sctpCapabilities },
          },
        );

SctpCapabilities has the required data in it. In the client when the ProducerTransport becomes connected I call a function which tries to create the DataProducer

await producerTransport.produceData({
  ordered: false,
  maxRetransmits: 1,
  label: 'chat',
  priority: 'medium',
  appData: { info: 'chat-data-producer' },
});

This then returns the following error UnsupportedError: SCTP not enabled by remote Transport

Any ideas if I’m doing something wrong.

2

No idea honestly, but you are doing something wrong somewhere. Perhaps you are not calling transport.produceData() in the proper server side transport or something like that.

3

hi @cian-w,

I’m facing the same or at least a similar issue, did you find out what was going wrong for you?

edit: found my mistake:
when creating the webrtc transport I did not return the sctpParameters in addition to ice and dtls!
seems to work now…

1 Like
4

Sorry, I’ve only just seen this now. Yep we had made the same mistake, not returning the SCTP params.

Nice one.