mirror of
https://github.com/m13253/dns-over-https.git
synced 2026-03-30 20:45:38 +00:00
125 lines
3.3 KiB
Go
125 lines
3.3 KiB
Go
/*
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DNS-over-HTTPS
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Copyright (C) 2017 Star Brilliant <m13253@hotmail.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published
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by the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package jsonDNS
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import (
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"net"
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)
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// RFC6890
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var localIPv4Nets = []net.IPNet {
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// This host on this network
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net.IPNet {
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net.IP { 0, 0, 0, 0 },
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net.IPMask { 255, 0, 0, 0 },
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},
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// Private-Use Networks
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net.IPNet {
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net.IP { 10, 0, 0, 0 },
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net.IPMask { 255, 0, 0, 0 },
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},
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// Shared Address Space
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net.IPNet {
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net.IP { 100, 64, 0, 0 },
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net.IPMask { 255, 192, 0, 0 },
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},
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// Loopback
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net.IPNet {
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net.IP { 127, 0, 0, 0 },
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net.IPMask { 255, 0, 0, 0 },
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},
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// Link Local
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net.IPNet {
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net.IP { 169, 254, 0, 0 },
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net.IPMask { 255, 255, 0, 0 },
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},
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// Private-Use Networks
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net.IPNet {
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net.IP { 172, 16, 0, 0 },
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net.IPMask { 255, 240, 0, 0 },
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},
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// DS-Lite
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net.IPNet {
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net.IP { 192, 0, 0, 0 },
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net.IPMask { 255, 255, 255, 248 },
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},
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// 6to4 Relay Anycast
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net.IPNet {
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net.IP { 192, 88, 99, 0 },
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net.IPMask { 255, 255, 255, 0 },
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},
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// Private-Use Networks
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net.IPNet {
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net.IP { 192, 168, 0, 0 },
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net.IPMask { 255, 255, 0, 0 },
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},
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// Reserved for Future Use & Limited Broadcast
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net.IPNet {
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net.IP { 240, 0, 0, 0 },
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net.IPMask { 240, 0, 0, 0 },
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},
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}
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// RFC6890
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var localIPv6Nets = []net.IPNet {
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// Unspecified & Loopback Address
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net.IPNet {
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net.IP { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
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net.IPMask { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe },
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},
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// Discard-Only Prefix
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net.IPNet {
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net.IP { 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
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net.IPMask { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
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},
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// Unique-Local
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net.IPNet {
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net.IP { 0xfc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
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net.IPMask { 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
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},
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// Linked-Scoped Unicast
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net.IPNet {
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net.IP { 0xfe, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
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net.IPMask { 0xff, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
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},
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}
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func IsGlobalIP(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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if ipv4 := ip.To4(); len(ipv4) == net.IPv4len {
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for _, ipnet := range localIPv4Nets {
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if ipnet.Contains(ip) {
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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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if len(ip) == net.IPv6len {
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for _, ipnet := range localIPv6Nets {
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if ipnet.Contains(ip) {
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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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return true
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}
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