How to compile google/quiche to WASM for use in the browser?

[guest271314]

I'm looking in to compiling google/quiche to WASM for use in the browser as a WebTransport server using Direct Sockets UDPSocket.

I asked over there and it appears nobody has yet compiled quiche to WASM.

Howe would I go about achieving the requirement of compiling quiche to WASM using Emscripten?

[sbc100]

I imagine the first step would be to add support for the Direct Sockets API to emscripten JS socket code (see src/lib/libsockfs.js).

However, as far as I can tell from googling the Direct Sockets is currently limited to isolated web apps and only available under chrome, is that right? Is that enough for you use case?

[guest271314]

While Direct Sockets API are intended to be only available in IWA's, since I'm more interested in Direct Sockets API's than IWA's I made it possible to open IWA's and control and use Direct Sockets API's in arbitrary Web pages, https://github.com/guest271314/sockets. For the server https://github.com/guest271314/direct-sockets-http-ws-server I'm trying to implement WebTransport over UDP in the browser. One pathway to that, as I see it, is compiling the relevant quiche parts to WebAssembly. This fails-components/webtransport#354 (comment) uses Node.js NAPI. I think substituting those parts for Emscripten equivalents would provide a means to just pass in a UDPSocket.

[sbc100]

There is an open issue for adding direct socket support here: #16737