/
mdns.go
50 lines (44 loc) · 996 Bytes
/
mdns.go
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package main
import (
"fmt"
"github.com/armon/mdns"
"log"
)
func GetAddr(entry *mdns.ServiceEntry) string {
//if entry.AddrV6 != nil {
// return "[" + entry.AddrV6.String() + "]"
//}
if entry.AddrV4 != nil {
return entry.AddrV4.String()
}
panic("Unknown address")
}
func GetHost() string {
fmt.Println("Searching for hosts...")
ch := make(chan *mdns.ServiceEntry, 8)
mdns.Lookup("_gosync._tcp", ch)
close(ch)
if len(ch) == 0 {
log.Fatalln("No hosts available, specify manually or try again")
}
entries := make([]mdns.ServiceEntry, len(ch))
i := 1
for entry := range ch {
addr := GetAddr(entry)
fmt.Printf("[%d] << %s >> %s:%d\n", i, entry.Host, addr, entry.Port)
entries[i-1] = *entry
i++
}
i = 0
first := true
for i < 1 || i > len(entries) {
if !first {
fmt.Println("Invalid, try again")
}
first = false
fmt.Printf("Selection: ")
fmt.Scanf("%d", &i)
}
fmt.Println()
return fmt.Sprintf("%s:%d", GetAddr(&entries[i-1]), entries[i-1].Port)
}