feat: Add socket-activated systemd service for discovery #218
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aleasto
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etc/systemd/wsdd-discovery.service
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| [Service] | ||
| Type=simple | ||
| ; The service is put into an empty runtime directory chroot, | ||
| ; i.e. the runtime directory which usually resides under /run | ||
| ExecStart=/usr/bin/wsdd --shortlog --chroot=/run/wsdd --source-port=37020 --no-host --discovery |
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Do we want to use the same flags from /etc/default/wsdd here?
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Might help in some minor use-cases, I think (including verbosity for debugging, e.g.), so why not. But I propose to use a different environment file.
I also propose to use a different run/chroot directory for the wsdd-discovery service in order to separate it from a regular host instance. Maybe even a different (dynamic) username might be good, although I'm not sure if dynamic users are inherently distinct (due to different namespace) even when sharing the same name.
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although I'm not sure if dynamic users are inherently distinct (due to different namespace) even when sharing the same name.
They're using the same UID/GID here, so no
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How's this?
I've used the same env file but a different variable name
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--source-port 37020 could also be set in the environment file instead of hard-coded inthe systemd unit
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It would be nice to make that configurable from the environmental file, but it is hardcoded in the firewall configuration anyway...
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TODO: |
aleasto
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That's #219 |
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aleasto
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@aleasto I split the UFW rules because I think enabling discovering other devices on the network should not open ports for the host itself to be discoverable. AFAIK, Windows actually has two services as well (fdPHost and FDResPub on Win11). WDYT? |
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Yeah I think I agree. Shouldn't you do the same for firewalld? |
Good point. Done |
Introduce a system-wide daemon listening on /run/wsdd.socket, which is managed by systemd. When a client first connects to the socket the daemon is started. Multiple clients can connect and safely use the API simultaneously. The service runs in discovery-only mode. Uses a fixed multicast source-port 37020, which is used by the socket-activated discovery daemon. Allow port 37020 in firewall profiles and split configurations for discovery (client) and host roles. Co-Authored-by: Steffen Christgau <[email protected]>
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Introduce a system-wide daemon listening on /run/wsdd.socket, which is managed by systemd.
When a client first connects to the socket the daemon is started. Multiple clients can connect and safely use the API simultaneously.
The service runs in discovery-only mode.
Uses multicast source-port 37020.