113 lines
1.6 KiB
Go
113 lines
1.6 KiB
Go
package main
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import (
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"context"
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"fmt"
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"net"
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"os"
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"os/signal"
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"sync"
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"time"
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"gitlab.com/tblyler/discovery/local"
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)
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func main() {
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b, err := local.NewBroadcast(
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&net.UDPAddr{
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IP: net.IPv4zero,
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Port: 50000,
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},
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nil,
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)
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if err != nil {
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fmt.Fprintln(os.Stderr, "Failed to create new broadcast:", err)
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os.Exit(1)
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}
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msgChan := make(chan []byte, 5)
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errChan := make(chan error, 2)
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ctx, cancel := context.WithCancel(context.Background())
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wg := sync.WaitGroup{}
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wg.Add(1)
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go func() {
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defer wg.Done()
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errChan <- b.Listen(ctx, msgChan)
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}()
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wg.Add(1)
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go func() {
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defer wg.Done()
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for {
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select {
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case <-ctx.Done():
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return
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case msg := <-msgChan:
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fmt.Println("Got message:", string(msg))
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}
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}
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}()
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wg.Add(1)
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go func() {
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defer wg.Done()
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ticker := time.NewTicker(time.Second * time.Duration(5))
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defer ticker.Stop()
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hostname, _ := os.Hostname()
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msg := []byte(hostname)
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interfaces, _ := net.InterfaceAddrs()
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for _, inter := range interfaces {
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msg = append(msg, []byte("\n"+inter.String())...)
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}
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msg = append(msg, []byte("\n")...)
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for {
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select {
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case <-ctx.Done():
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return
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case tTime := <-ticker.C:
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fmt.Println("Sending message at", tTime)
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err := b.Send(msg)
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if err != nil {
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errChan <- err
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return
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}
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}
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}
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}()
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wg.Add(1)
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go func() {
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defer wg.Done()
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defer cancel()
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sigChan := make(chan os.Signal)
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signal.Notify(sigChan, os.Interrupt)
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for {
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select {
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case err := <-errChan:
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fmt.Println("Got error:", err)
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return
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case <-sigChan:
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fmt.Println("Got signal to quit, quitting")
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return
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}
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}
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}()
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wg.Wait()
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}
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