73 lines
3.0 KiB
Markdown
73 lines
3.0 KiB
Markdown
|
# peerdiscovery
|
||
|
|
|
||
|
|
<img src="https://img.shields.io/badge/coverage-89%25-brightgreen.svg?style=flat-square" alt="Code coverage"> <a href="https://goreportcard.com/report/github.com/schollz/peerdiscovery"><img src="https://goreportcard.com/badge/github.com/schollz/peerdiscovery?style=flat-square" alt="Go Report"></a> <a href="https://godoc.org/github.com/schollz/peerdiscovery"><img src="http://img.shields.io/badge/godoc-reference-5272B4.svg?style=flat-square" alt="Go Doc"></a>
|
||
|
|
|
||
|
|
Pure-go library for cross-platform thread-safe local peer discovery using UDP multicast. I needed to use peer discovery for [croc](https://github.com/schollz/croc) and everything I tried had problems, so I made another one.
|
||
|
|
|
||
|
|
|
||
|
|
## Install
|
||
|
|
|
||
|
|
Make sure you have Go 1.5+.
|
||
|
|
|
||
|
|
```
|
||
|
|
go get -u github.com/schollz/peerdiscovery
|
||
|
|
```
|
||
|
|
|
||
|
|
## Usage
|
||
|
|
|
||
|
|
The following is a code to find the first peer on the local network and print it out.
|
||
|
|
|
||
|
|
```golang
|
||
|
|
discoveries, _ := peerdiscovery.Discover(peerdiscovery.Settings{Limit: 1})
|
||
|
|
for _, d := range discoveries {
|
||
|
|
fmt.Printf("discovered '%s'\n", d.Address)
|
||
|
|
}
|
||
|
|
```
|
||
|
|
|
||
|
|
Here's the output when running on two computers. (*Run these gifs in sync by hitting Ctl + F5*).
|
||
|
|
|
||
|
|
**Computer 1:**
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
**Computer 2:**
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
For more examples, see the scanning examples ([ipv4](https://github.com/schollz/peerdiscovery/blob/master/examples/ipv4/main.go) and [ipv6](https://github.com/schollz/peerdiscovery/blob/master/examples/ipv6/main.go)) or [the docs](https://pkg.go.dev/github.com/schollz/peerdiscovery).
|
||
|
|
|
||
|
|
|
||
|
|
## Testing
|
||
|
|
|
||
|
|
To test the peer discovery with just one host, one can launch multiple containers. The provided `Dockerfile` will run the example code.
|
||
|
|
Please make sure to enable [Docker's IPv6 support](https://docs.docker.com/v17.09/engine/userguide/networking/default_network/ipv6/) if you are using IPv6 for peer discovery.
|
||
|
|
|
||
|
|
```console
|
||
|
|
# Build the container, named peertest
|
||
|
|
$ docker build -t peertest .
|
||
|
|
|
||
|
|
# Execute the following command in multiple terminals
|
||
|
|
$ docker run -t --rm peertest
|
||
|
|
Scanning for 10 seconds to find LAN peers
|
||
|
|
100% |████████████████████████████████████████| [9s:0s]Found 1 other computers
|
||
|
|
0) '172.17.0.2' with payload 'zqrecHipCO'
|
||
|
|
```
|
||
|
|
|
||
|
|
|
||
|
|
## Contributing
|
||
|
|
|
||
|
|
Pull requests are welcome. Feel free to...
|
||
|
|
|
||
|
|
- Revise documentation
|
||
|
|
- Add new features
|
||
|
|
- Fix bugs
|
||
|
|
- Suggest improvements
|
||
|
|
|
||
|
|
## Thanks
|
||
|
|
|
||
|
|
Thanks [@geistesk](https://github.com/geistesk) for adding IPv6 support and a `Notify` func, and helping maintain! Thanks [@Kunde21](https://github.com/Kunde21) for providing a bug fix and massively refactoring the code in a much better way. Thanks [@robpre](https://github.com/robpre) for finding and fixing bugs. Thanks [@shvydky](https://github.com/shvydky) for adding dynamic payloads.
|
||
|
|
|
||
|
|
## License
|
||
|
|
|
||
|
|
MIT
|