enricobuehler
62e0367f4b
The native data plane used a random ephemeral UDP port (hole-punched), which a strict firewall can't pre-open — so remote clients behind one couldn't connect. Add an optional fixed data port: - `Punktfunk1Options`/`NativeServe` gain `data_port`; `bind_data_socket` binds the fixed port (→ direct, no hole-punch) or falls back to a random port + hole-punch when unset or the fixed port is busy (a concurrent session already holds it). - `UdpTransport::from_socket`/`from_socket_punch` adopt an already-bound socket, so the host keeps the SAME data socket from handshake through streaming — no drop-then-rebind window in which a concurrent session could steal a fixed port. - `main.rs` wires the CLI flag through to `NativeServe`. - Firewall docs updated (troubleshooting.md + apt/pacman/bazzite READMEs): control plane is the fixed UDP 9777; the data plane is a separate random port that usually needs no rule, with the fixed-port option for strict firewalls. Unit-tested: default random+hole-punch, and fixed-port-then-fallback-when-busy. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
121 lines
5.9 KiB
Markdown
121 lines
5.9 KiB
Markdown
# punktfunk-host — Debian/Ubuntu package (apt)
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`punktfunk-host` is published as a `.deb` to **Gitea's Debian package registry** in the public
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`unom` org, so the Ubuntu hosts update with plain `apt`. CI (`.gitea/workflows/deb.yml`) builds
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and publishes on every push to `main` (a rolling `0.5.0~ciN.g<sha>` build to the **`canary`** apt
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distribution) and on `vX.Y.Z` tags (a clean `X.Y.Z` to the **`stable`** distribution, plus attached
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to the unified Gitea Release). The two are separate apt distributions, so a stable box never jumps
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to a canary build — see [Release Channels](https://punktfunk.unom.io/docs/channels). The repo line
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below subscribes to `stable`; swap `stable` → `canary` for the latest main builds.
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The same workflow also publishes **`punktfunk-web`** (the browser management console — pairing +
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status) and **`punktfunk-client`** (the GTK4 couch/Deck client). `punktfunk-host` **Recommends**
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`punktfunk-web`, so a default `apt install punktfunk-host` pulls the console too (alongside the
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udev/sysctl bits) unless you've disabled weak deps; `punktfunk-client` is independent — install it
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on the box you stream *to*. (`punktfunk-probe` is the headless reference/test tool, not packaged
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here.)
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Package layout mirrors the Fedora RPM (`../rpm/punktfunk.spec`): the host binary, the `/dev/uinput`
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udev rule, the systemd **user** unit, headless session helpers, the example config, and the OpenAPI
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doc. Runtime `Depends` are computed by `dpkg-shlibdeps` from the binary itself (built in the Ubuntu
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26.04 rust-ci image, so the lib soname package names match the target). The NVIDIA driver
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(`libnvidia-encode` / `libEGL_nvidia` / `libcuda`) is **not** a dependency — it's installed out of
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band, like on the RPM side.
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## Install on a host (one-time)
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The registry is public, so no apt auth is needed — just trust the repo's signing key:
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```sh
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sudo install -d -m 0755 /etc/apt/keyrings
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curl -fsSL https://git.unom.io/api/packages/unom/debian/repository.key \
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| sudo tee /etc/apt/keyrings/punktfunk.asc >/dev/null
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echo "deb [signed-by=/etc/apt/keyrings/punktfunk.asc] https://git.unom.io/api/packages/unom/debian stable main" \
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| sudo tee /etc/apt/sources.list.d/punktfunk.list
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sudo apt update
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sudo apt install punktfunk-host
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```
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Then, as the desktop user:
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```sh
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sudo usermod -aG input "$USER" # virtual gamepads (re-login to take effect)
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mkdir -p ~/.config/punktfunk
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cp /usr/share/punktfunk-host/host.env.example ~/.config/punktfunk/host.env # then edit
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systemctl --user enable --now punktfunk-host
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# Web console — enable it and read the auto-generated login password (then open https://<host-ip>:47992):
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systemctl --user enable --now punktfunk-web
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journalctl --user -u punktfunk-web-init | sed -n 's/.*password generated: //p'
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```
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## Firewall
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Open the ports the host listens on. The **native `punktfunk/1`** plane:
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- **QUIC control plane: UDP 9777** (`serve --native-port N` to change).
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- **Data plane: a separate UDP port.** By default it's *random* — the host binds `0.0.0.0:0` and
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tells the client which port it got. Video flows host → client, but the **client sends the first
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packet** (a hole-punch), so the host learns the client's real source and streams back — this
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traverses NAT / inter-VLAN with no forwarded port. **You normally don't open it:** if a deny-inbound
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firewall drops the punch, the host waits ~2.5 s and falls back to the client-reported address, and a
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stateful firewall then admits the return (it just adds ~2.5 s to session start). To skip that delay,
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pin it with **`serve --data-port <PORT>`** (or `PUNKTFUNK_DATA_PORT`): the host binds that fixed
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port and streams direct (no punch-wait) — open exactly that one port. A fixed port serves one
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session at a time (concurrent ones fall back to random + hole-punch), and direct mode needs the
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client's reported address to be reachable (flat LAN / a non-remapping port-forward).
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And the **GameStream / Moonlight** ports (fixed) — only needed if you run the host with
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`serve --gamestream` (opt-in, trusted LAN only); bare `serve` is native-only and doesn't open these:
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| Port | Proto | Purpose |
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|---|---|---|
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| 47984 | TCP | HTTPS nvhttp (paired, mutual-TLS) |
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| 47989 | TCP | HTTP nvhttp (`/serverinfo`, `/pair` PIN flow) |
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| 48010 | TCP | RTSP handshake |
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| 47998–48010 | UDP | Video RTP (+ FEC), ENet control (47999), audio (48000) |
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| 5353 | UDP | mDNS auto-discovery |
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The mgmt API (TCP 47990) binds to loopback by default — leave it closed unless you move it off
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loopback with `--mgmt-bind IP:PORT` (which then requires `--mgmt-token`).
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With `ufw`:
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```sh
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sudo ufw allow 9777/udp # punktfunk/1 control plane
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sudo ufw allow 47984/tcp && sudo ufw allow 47989/tcp && sudo ufw allow 48010/tcp
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sudo ufw allow 47998:48010/udp
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sudo ufw allow 5353/udp
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# The punktfunk/1 data plane uses a random UDP port; leave it closed on a LAN — the host hole-punches
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# and falls back (~2.5s at session start if firewalled). To skip that, pin it: `serve --data-port
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# 9778` and `ufw allow 9778/udp`.
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```
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With raw `nftables` (add to your `inet filter input` chain):
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```
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udp dport 9777 accept # punktfunk/1 control plane
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tcp dport { 47984, 47989, 48010 } accept
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udp dport { 47998-48010, 5353 } accept
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# The punktfunk/1 data plane is a random UDP port — normally left closed (hole-punch + ~2.5s
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# fallback). Pin it with `serve --data-port <PORT>` to open exactly one instead.
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```
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## Updates
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```sh
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sudo apt update && sudo apt upgrade # picks up the newest published build
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systemctl --user restart punktfunk-host # if the unit was already running
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```
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## Build a `.deb` locally
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```sh
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VERSION=0.0.1 bash packaging/debian/build-deb.sh # -> dist/punktfunk-host_0.0.1_amd64.deb
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```
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Needs `dpkg-dev` (`dpkg-shlibdeps`, `dpkg-deb`). It builds the release binary first if missing.
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Build it in the rust-ci image (or on an Ubuntu 26.04 box) so the resolved `Depends` match the
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hosts; building on a GPU box is fine — the NVIDIA driver lib is filtered out either way.
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