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20 lines
536 B
Go
20 lines
536 B
Go
// Copyright 2021 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package util
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import (
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"net"
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)
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// IsIPPrivate for net.IP.IsPrivate. TODO: replace with `ip.IsPrivate()` if min go version is bumped to 1.17
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func IsIPPrivate(ip net.IP) bool {
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if ip4 := ip.To4(); ip4 != nil {
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return ip4[0] == 10 ||
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(ip4[0] == 172 && ip4[1]&0xf0 == 16) ||
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(ip4[0] == 192 && ip4[1] == 168)
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}
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return len(ip) == net.IPv6len && ip[0]&0xfe == 0xfc
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}
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