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main.go
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main.go
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package main
import (
"flag"
"log"
"net"
"time"
)
const maxDatagramSize = 8192
var refereeAddress = flag.String("refereeAddress", "224.5.23.1:10003", "The multicast address of ssl-game-controller")
var visionAddress = flag.String("visionAddress", "224.5.23.2:10006", "The multicast address of ssl-vision")
var refereeRemotes []string
func main() {
flag.Parse()
go watchAddress(*refereeAddress)
watchAddress(*visionAddress)
}
func watchAddress(address string) {
addr, err := net.ResolveUDPAddr("udp", address)
if err != nil {
log.Fatal(err)
}
conn, err := net.ListenMulticastUDP("udp", nil, addr)
if err != nil {
log.Fatal(err)
}
if err := conn.SetReadBuffer(maxDatagramSize); err != nil {
log.Printf("Could not set read buffer to %v.", maxDatagramSize)
}
log.Println("Receiving from", address)
for {
_, udpAddr, err := conn.ReadFromUDP([]byte{0})
if err != nil {
log.Print("Could not read", err)
time.Sleep(1 * time.Second)
continue
}
addRemote(address, udpAddr.IP.String())
}
}
func addRemote(address string, remote string) {
for _, a := range refereeRemotes {
if a == remote {
return
}
}
refereeRemotes = append(refereeRemotes, remote)
log.Printf("remote ip on %v: %v\n", address, remote)
}