55 lines
1.6 KiB
Go
Executable File
55 lines
1.6 KiB
Go
Executable File
package guard
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import "net/netip"
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var blockedPrefixes = []netip.Prefix{
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netip.MustParsePrefix("0.0.0.0/8"),
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netip.MustParsePrefix("10.0.0.0/8"),
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netip.MustParsePrefix("100.64.0.0/10"),
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netip.MustParsePrefix("127.0.0.0/8"),
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netip.MustParsePrefix("169.254.0.0/16"),
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netip.MustParsePrefix("172.16.0.0/12"),
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netip.MustParsePrefix("192.0.0.0/24"),
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netip.MustParsePrefix("192.0.2.0/24"),
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netip.MustParsePrefix("192.88.99.0/24"),
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netip.MustParsePrefix("192.168.0.0/16"),
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netip.MustParsePrefix("198.18.0.0/15"),
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netip.MustParsePrefix("198.51.100.0/24"),
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netip.MustParsePrefix("203.0.113.0/24"),
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netip.MustParsePrefix("224.0.0.0/4"),
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netip.MustParsePrefix("240.0.0.0/4"),
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netip.MustParsePrefix("::/128"),
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netip.MustParsePrefix("::1/128"),
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netip.MustParsePrefix("::ffff:0:0/96"),
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netip.MustParsePrefix("64:ff9b::/96"),
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netip.MustParsePrefix("64:ff9b:1::/48"),
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netip.MustParsePrefix("100::/64"),
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netip.MustParsePrefix("2001::/32"),
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netip.MustParsePrefix("2001:db8::/32"),
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netip.MustParsePrefix("2002::/16"),
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netip.MustParsePrefix("fc00::/7"),
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netip.MustParsePrefix("fe80::/10"),
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netip.MustParsePrefix("fec0::/10"),
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netip.MustParsePrefix("ff00::/8"),
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}
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func IsPublicAddress(address netip.Addr) bool {
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address = address.Unmap().WithZone("")
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if !address.IsValid() ||
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!address.IsGlobalUnicast() ||
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address.IsPrivate() ||
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address.IsLoopback() ||
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address.IsLinkLocalUnicast() ||
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address.IsMulticast() ||
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address.IsUnspecified() {
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return false
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}
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for _, prefix := range blockedPrefixes {
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if prefix.Contains(address) {
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return false
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}
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}
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return true
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}
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