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fix: auto-detect tailnet DNS hint

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This commit is contained in:
Peter Steinberger
2025-12-20 14:23:53 +01:00
parent 082b4fb193
commit 3e39dd49aa
5 changed files with 65 additions and 26 deletions
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4
docs/bonjour.md
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@@ -93,7 +93,7 @@ The Gateway advertises small non-secret hints to make UI flows convenient:
- `gatewayPort=<port>` (informational; the Gateway WS is typically loopback-only)
- `bridgePort=<port>` (only when bridge is enabled)
- `canvasPort=<port>` (only when the canvas host is running; enabled by default; default `18793`)
- `tailnetDns=<magicdns>` (optional hint; may be absent)
- `tailnetDns=<magicdns>` (optional hint; auto-detected from Tailscale when available; may be absent)
## Debugging on macOS
@@ -149,7 +149,7 @@ Bonjour/DNS-SD often escapes bytes in service instance names as decimal `\\DDD`
- `bridge.bind` / `bridge.port` in `~/.clawdis/clawdis.json` control bridge bind/port (preferred).
- `CLAWDIS_BRIDGE_HOST` / `CLAWDIS_BRIDGE_PORT` still work as a back-compat override when `bridge.bind` / `bridge.port` are not set.
- `CLAWDIS_SSH_PORT` overrides the SSH port advertised in `_clawdis-bridge._tcp`.
- `CLAWDIS_TAILNET_DNS` publishes a `tailnetDns` hint (MagicDNS) in `_clawdis-bridge._tcp` (wide-area discovery uses `clawdis.internal.` automatically when enabled).
- `CLAWDIS_TAILNET_DNS` publishes a `tailnetDns` hint (MagicDNS) in `_clawdis-bridge._tcp`. If unset, the gateway auto-detects Tailscale and publishes the MagicDNS name when possible.
## Related docs

6
docs/discovery.md
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@@ -55,7 +55,7 @@ Troubleshooting and beacon details: `docs/bonjour.md`.
- `gatewayPort=18789` (loopback WS port; informational)
- `bridgePort=18790` (when bridge is enabled)
- `canvasPort=18793` (when the canvas host is running; enabled by default)
- `tailnetDns=<magicdns>` (optional hint)
- `tailnetDns=<magicdns>` (optional hint; auto-detected when Tailscale is available)
Disable/override:
- `CLAWDIS_DISABLE_BONJOUR=1` disables advertising.
@@ -63,14 +63,14 @@ Disable/override:
- `bridge.bind` / `bridge.port` in `~/.clawdis/clawdis.json` control bridge bind/port (preferred).
- `CLAWDIS_BRIDGE_HOST` / `CLAWDIS_BRIDGE_PORT` still work as a back-compat override when `bridge.bind` / `bridge.port` are not set.
- `CLAWDIS_SSH_PORT` overrides the SSH port advertised in the bridge beacon (defaults to 22).
- `CLAWDIS_TAILNET_DNS` publishes a `tailnetDns` hint (MagicDNS) in the bridge beacon.
- `CLAWDIS_TAILNET_DNS` publishes a `tailnetDns` hint (MagicDNS) in the bridge beacon (auto-detected if unset).
### 2) Tailnet (cross-network)
For London/Vienna style setups, Bonjour won’t help. The recommended “direct” target is:
- Tailscale MagicDNS name (preferred) or a stable tailnet IP.
If the gateway can detect it is running under Tailscale, it can publish `tailnetDns` as an optional hint for clients.
If the gateway can detect it is running under Tailscale, it publishes `tailnetDns` as an optional hint for clients.
### 3) Manual / SSH target