bug: support for MSC4143 is not advertised #2216

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opened 2026-09-08 14:37:24 +00:00 by Henry-Hiles · 2 comments

Henry-Hiles commented

2026-09-08 14:37:24 +00:00

Member

What is the bug?

Continuwuity does not advertise support for MSC4143 in /versions, breaking calling in clients such as Gomuks. Since MatrixRTC is supported, including transports, this should be advertised.

Steps to reproduce

Start a call in up-to-date Gomuks on a Continuwuity server.

Server name and version

continuwuity 26.8.1 (64f5a23)

Additional context

#2183 tried to fix this, but incorrectly only enabled it if sticky events were enabled. It should be enabled if transports are defined at all, probably, or just always.

### What is the bug? Continuwuity does not advertise support for MSC4143 in `/versions`, breaking calling in clients such as Gomuks. Since MatrixRTC is supported, including transports, this should be advertised. ### Steps to reproduce Start a call in up-to-date Gomuks on a Continuwuity server. ### Server name and version continuwuity 26.8.1 (64f5a23) ### Additional context #2183 tried to fix this, but incorrectly only enabled it if sticky events were enabled. It should be enabled if transports are defined at all, probably, or just always.

Henry-Hiles added the

Bug

Status

Needs Investigation

labels

2026-09-08 14:37:24 +00:00

Henry-Hiles referenced this issue from a pull request that will close it,

2026-09-08 17:33:29 +00:00

feat(rtc): Advertise MSC4143 in /versions #2218

stratself commented

2026-09-08 18:13:12 +00:00

Member

For those that haven't got around to update, the workaround is simply to advertise "org.matrix.msc4143": true via the reverse proxy.

Example Caddyfile

https://matrix.yourdomain.com {

    # other shenanigans here
    # ...
   
    handle_path /_matrix/client/versions {
        header {
            # these headers match what Continuwuity returns
            Access-Control-Allow-Origin `*`
            Content-Security-Policy `default-src 'none';frame-ancestors 'none';form-action 'none';base-uri 'none';sandbox`
        }

        respond <<JSON
            {
            "versions": [
                "r0.0.1",
                "r0.1.0",
                "r0.2.0",
                "r0.3.0",
                "r0.4.0",
                "r0.5.0",
                "r0.6.0",
                "r0.6.1",
                "v1.1",
                "v1.2",
                "v1.3",
                "v1.4",
                "v1.5",
                "v1.8",
                "v1.11",
                "v1.12",
                "v1.13",
                "v1.14",
                "v1.15",
                "v1.16",
                "v1.17",
                "v1.18"
            ],
            "unstable_features": {
                "computer.gingershaped.msc4466": true,
                "org.matrix.msc4155": true,
                "org.matrix.msc4174": true,
                "org.matrix.msc4354": true,
                "org.matrix.simplified_msc3575": true,
                "uk.half-shot.msc2666.query_mutual_rooms": true,
                "uk.half-shot.msc2666.query_mutual_rooms.stable": true,
                "org.matrix.msc4143": true
            }
            }
            JSON
    }
}

For those that haven't got around to update, the workaround is simply to advertise `"org.matrix.msc4143": true` via the reverse proxy. <details> <summary>Example Caddyfile</summary> ``` https://matrix.yourdomain.com { # other shenanigans here # ... handle_path /_matrix/client/versions { header { # these headers match what Continuwuity returns Access-Control-Allow-Origin `*` Content-Security-Policy `default-src 'none';frame-ancestors 'none';form-action 'none';base-uri 'none';sandbox` } respond <<JSON { "versions": [ "r0.0.1", "r0.1.0", "r0.2.0", "r0.3.0", "r0.4.0", "r0.5.0", "r0.6.0", "r0.6.1", "v1.1", "v1.2", "v1.3", "v1.4", "v1.5", "v1.8", "v1.11", "v1.12", "v1.13", "v1.14", "v1.15", "v1.16", "v1.17", "v1.18" ], "unstable_features": { "computer.gingershaped.msc4466": true, "org.matrix.msc4155": true, "org.matrix.msc4174": true, "org.matrix.msc4354": true, "org.matrix.simplified_msc3575": true, "uk.half-shot.msc2666.query_mutual_rooms": true, "uk.half-shot.msc2666.query_mutual_rooms.stable": true, "org.matrix.msc4143": true } } JSON } } ```

Henry-Hiles commented

2026-09-08 18:17:42 +00:00

Author

Member

You can also run #2218, which fixes this.

You can also run https://forgejo.ellis.link/continuwuation/continuwuity/pulls/2218, which fixes this.