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22 lines
474 B
Go
22 lines
474 B
Go
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package mox
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import (
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"net"
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)
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// Network returns tcp4 or tcp6, depending on the ip.
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// This network can be passed to Listen instead of "tcp", which may start listening
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// on both ipv4 and ipv6 for addresses 0.0.0.0 and ::, which can lead to errors
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// about the port already being in use.
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// For invalid IPs, "tcp" is returned.
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func Network(ip string) string {
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v := net.ParseIP(ip)
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if v == nil {
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return "tcp"
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}
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if v.To4() != nil {
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return "tcp4"
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}
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return "tcp6"
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}
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