Closed
Description
What version of Go are you using (go version)?
$ go version go version go1.21.3 windows/amd64
Does this issue reproduce with the latest release?
Yes
What operating system and processor architecture are you using (go env)?
go env Output
$ go env set GOHOSTARCH=amd64 set GOHOSTOS=windows
What did you do?
package main
import (
"fmt"
"net"
)
func main() {
multicastIP := net.ParseIP("ff02::c")
multicastAddr := net.UDPAddr{IP: multicastIP}
interfaces, err := net.Interfaces()
if err != nil {
fmt.Println("Failed to list interfaces", err)
return
}
for _, iface := range interfaces {
if iface.Flags&net.FlagUp == 0 || iface.Flags&net.FlagLoopback != 0 || iface.Flags&net.FlagMulticast == 0 {
fmt.Println("Skipping interface", iface.Name)
continue
}
conn, err := net.ListenMulticastUDP("udp6", &iface, &multicastAddr)
if err != nil {
fmt.Println("Failed to listen on", iface.Name, err)
continue
}
fmt.Println("Listening on", iface.Name)
defer conn.Close()
}
}What did you expect to see?
Example output on a Linux host:
Skipping interface lo
Listening on enp0s31f6
Listening on enxc4cbe10cec3d
Listening on wlp0s20f3
Listening on virbr0
Skipping interface wg0
Skipping interface wg1
Listening on docker0
Listening on br-651beae84a39
Listening on vethfed639d
Listening on vnet0
What did you see instead?
This fails for regular interfaces on Windows 10 and Windows 11 hosts:
Failed to listen on Ethernet-Instanz 0 listen udp6 [ff02::c]:0: setsockopt: not supported by windows
Skipping interface Loopback Pseudo-Interface 1
