1package mox

2

3import (

4 "net"

5)

6

7// Network returns tcp4 or tcp6, depending on the ip.

8// This network can be passed to Listen instead of "tcp", which may start listening

9// on both ipv4 and ipv6 for addresses 0.0.0.0 and ::, which can lead to errors

10// about the port already being in use.

11// For invalid IPs, "tcp" is returned.

12func Network(ip string) string {

13 v := net.ParseIP(ip)

14 if v == nil {

15 return "tcp"

16 }

17 if v.To4() != nil {

18 return "tcp4"

19 }

20 return "tcp6"

21}

22