41 lines
617 B
Go
41 lines
617 B
Go
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package netutil
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import "net"
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var privateNets []*net.IPNet
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func init() {
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for _, cidr := range []string{
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"127.0.0.0/8",
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"10.0.0.0/8",
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"172.16.0.0/12",
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"192.168.0.0/16",
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"::1/128",
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"fe80::/10",
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"fc00::/7",
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} {
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_, network, _ := net.ParseCIDR(cidr)
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privateNets = append(privateNets, network)
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}
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}
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func IsPrivate(host string) bool {
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if host == "localhost" {
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return true
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}
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return IsPrivateIP(net.ParseIP(host))
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}
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func IsPrivateIP(ip net.IP) bool {
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if ip == nil {
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return false
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}
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for _, privateNet := range privateNets {
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if privateNet.Contains(ip) {
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return true
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}
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}
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return false
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}
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