how to use msquic on my own udp socket

[memetao (MemeTao)]

I want use msquic on my app:

I cerate an udp socket, and provide 'send' 'recv' to msquic, is there such an interface?

[Nick Banks (nibanks)]

Unfortunately, no. MsQuic doesn't support app-owned UDP sockets as we have to set a lot of custom socket options to make everything work. What are you trying to accomplish? Why do you need to own the socket?

[thunder (chunlei-wu)]

I guess the webrtc have their own peer connection channel, such as P2P channel or something else, so all the webrtc data should be send/received via the peer connection channel. If you want to send some data encapsulated in QUIC, you will hope to do the following:
1, start quic
2, connect
3, create stream
4, send the data to quic
5, quic return the udp datagram with quic frame
6, get the udp datagram
7, send the udp datagram via the peer connection channel
on the other hand, for the receive data:
1, receive the udp datagram with quic frame from the peer connection channel
2, call some API to make quic handle it as quic receive udp datagram from its socket
3, quic return the data to webrtc without the quic header

I also want to know how to handle the similar case, such as: I want to setup a tunnel protocol channel, I hope the user data will transfer by quic protocol via the tunnel channel, how to handle it?

[memetao (MemeTao)]

That dude is right, I mean it too

[guest271314]

I'm working on something similar, trying to get a WebTransport server working in the browser over Direct Sockets UDPSocket. To do that, I think compiling the core functionality to WASM will work, reading from and writing to the UDP socket. Where exactly is the network socket created in MsQuic?

[Guillaume Hetier (guhetier)]

guest271314 If you are interested, you can look at CxPlatSocketCreateUdp and what happens from there in SocketCreateUdp, etc...
The code is somewhat convoluted, with different implementations for different platforms.

We might refactor this code soon, if we have a chance, but as of now, there is no straightforward way to bring your own socket.

[guest271314]

Guillaume Hetier (@guhetier)

guest271314 If you are interested, you can look at CxPlatSocketCreateUdp and what happens from there in SocketCreateUdp, etc... The code is somewhat convoluted, with different implementations for different platforms.

We might refactor this code soon, if we have a chance, but as of now, there is no straightforward way to bring your own socket.

Yeah, I don't think I can cite a repository off the top of my head that has a QUIC/WebTransport implementation where you can bring your own (UDP) socket.

Targeting WASM/WASI for the TLS and protocol might also be useful, too.