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lgtv-sdp
★ 19
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Fake startup service for LG TV
Download README (.md)
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lgtv-sdp
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# lgtv-sdp [](https://goreportcard.com/report/github.com/dsheets/lgtv-sdp) **tl;dr**: LG 'smart' TV and projector devices want to phone home to get the date and time and this daemon fixes these defective devices. You just got a fancy new display from LG! Congratulations! Unfortunately, when you decided to make it behave itself by firewalling it, it stopped automatically updating its time and date. Maybe your display is the amazing HU-80 CineBeam portable 4K laster projector and its time and date get thrown away every time you store it. Or maybe you have a TV on a smart plug. Or maybe your power is intermittent. Or maybe you just never want to have to worry about date and time on a bloody 'smart' display device. It's so nice to just have the YouTube app on the device work properly... so easy. Except Google serves TLS certificates with *NotValidBefore* set so the YouTube app is unusable until you set the date and time manually. :-( And the device doesn't listen to the NTP server setting that it itself requests via DHCP. :-( Luckily, no certificate checking is done on the initial phone home request it makes and the server response contains an HTTP header with the current time in milliseconds since the UNIX epoch. Whew! ## Installation for the impatient 1. Download correct build for your platform. 2. Unpack archive (it will create a subdirectory for you) where you want to 'install' the daemon. 3. `cd` into the installation directory and run `sudo ./lgtv-sdp -s install BIND_ADDRESS` where `BIND_ADDRESS` is the IP you want the daemon to listen on or `0.0.0.0` or `::` for all addresses. 4. Redirect DNS for `*.lgtvsdp.com` to an address where the daemon is listening. 5. Enjoy _your_ LG display with the correct time! ## Building 1. Ensure go 1.14 is installed. 2. Clone this repo. 3. `go build` or `GOOS=TARGET_OS GOARCH=TARGET_ARCH go build` ## How it works ### TLS The daemon will check if `key.pem` and `cert.pem` files are present in its directory and, if they aren't, will create new certificate authority (CA) certificate and a domain certificate and sign the domain certificate with the CA key. The daemon will then start an HTTPS server on the standard port 443. ### API The HTTPS server will respond with the contents of `initservices.json` with the headers in the files under `initservices.headers/` to requests for any paths. The `X-Server-Time` header will always be set to the number of milliseconds since the UNIX epoch. You may be able to customize more aspects of your device(s) by sending specific headers or JSON content but none of that is necessary to set the time. Home screen widgets and further request behavior are both probably controllable with specific responses. Your contributions are very welcome. ## Help wanted We need: 1. A Windows service tester 2. LG webOS 4 and 5 testers 3. A free world ## Contributing Patches, documentation, cool features, and more are welcome. Negativity and lawsuits are not welcome.
