103 lines
4.0 KiB
Go
103 lines
4.0 KiB
Go
// GoToSocial
|
|
// Copyright (C) GoToSocial Authors admin@gotosocial.org
|
|
// SPDX-License-Identifier: AGPL-3.0-or-later
|
|
//
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Affero General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Affero General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Affero General Public License
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package netutil
|
|
|
|
import (
|
|
"net/netip"
|
|
)
|
|
|
|
var (
|
|
// IPv6Reserved contains IPv6 reserved IP prefixes.
|
|
// https://www.iana.org/assignments/iana-ipv6-special-registry/iana-ipv6-special-registry.xhtml
|
|
IPv6Reserved = [...]netip.Prefix{
|
|
netip.MustParsePrefix("::1/128"), // Loopback
|
|
netip.MustParsePrefix("::/128"), // Unspecified address
|
|
netip.MustParsePrefix("::ffff:0:0/96"), // IPv4-mapped address
|
|
netip.MustParsePrefix("64:ff9b::/96"), // IPv4/IPv6 translation, RFC 6052
|
|
netip.MustParsePrefix("64:ff9b:1::/48"), // IPv4/IPv6 translation, RFC 8215
|
|
netip.MustParsePrefix("100::/64"), // Discard prefix, RFC 6666
|
|
netip.MustParsePrefix("2001::/23"), // IETF Protocol Assignments, RFC 2928
|
|
netip.MustParsePrefix("2001:db8::/32"), // Test, doc, examples
|
|
netip.MustParsePrefix("2002::/16"), // 6to4
|
|
netip.MustParsePrefix("2620:4f:8000::/48"), // Direct Delegation AS112 Service, RFC 7534
|
|
netip.MustParsePrefix("fc00::/7"), // Unique Local
|
|
netip.MustParsePrefix("fe80::/10"), // Link-local
|
|
netip.MustParsePrefix("fec0::/10"), // Site-local, deprecated
|
|
netip.MustParsePrefix("ff00::/8"), // Multicast
|
|
}
|
|
|
|
// IPv4Reserved contains IPv4 reserved IP prefixes.
|
|
// https://www.iana.org/assignments/iana-ipv4-special-registry/iana-ipv4-special-registry.xhtml
|
|
IPv4Reserved = [...]netip.Prefix{
|
|
netip.MustParsePrefix("0.0.0.0/8"), // Current network
|
|
netip.MustParsePrefix("10.0.0.0/8"), // Private
|
|
netip.MustParsePrefix("100.64.0.0/10"), // RFC6598
|
|
netip.MustParsePrefix("127.0.0.0/8"), // Loopback
|
|
netip.MustParsePrefix("169.254.0.0/16"), // Link-local
|
|
netip.MustParsePrefix("172.16.0.0/12"), // Private
|
|
netip.MustParsePrefix("192.0.0.0/24"), // RFC6890
|
|
netip.MustParsePrefix("192.0.2.0/24"), // Test, doc, examples
|
|
netip.MustParsePrefix("192.31.196.0/24"), // AS112-v4, RFC 7535
|
|
netip.MustParsePrefix("192.52.193.0/24"), // AMT, RFC 7450
|
|
netip.MustParsePrefix("192.88.99.0/24"), // IPv6 to IPv4 relay
|
|
netip.MustParsePrefix("192.168.0.0/16"), // Private
|
|
netip.MustParsePrefix("192.175.48.0/24"), // Direct Delegation AS112 Service, RFC 7534
|
|
netip.MustParsePrefix("198.18.0.0/15"), // Benchmarking tests
|
|
netip.MustParsePrefix("198.51.100.0/24"), // Test, doc, examples
|
|
netip.MustParsePrefix("203.0.113.0/24"), // Test, doc, examples
|
|
netip.MustParsePrefix("224.0.0.0/4"), // Multicast
|
|
netip.MustParsePrefix("240.0.0.0/4"), // Reserved (includes broadcast / 255.255.255.255)
|
|
}
|
|
)
|
|
|
|
// ValidateAddr will parse a netip.AddrPort from string, and return the result of ValidateIP() on addr.
|
|
func ValidateAddr(s string) bool {
|
|
ipport, err := netip.ParseAddrPort(s)
|
|
if err != nil {
|
|
return false
|
|
}
|
|
return ValidateIP(ipport.Addr())
|
|
}
|
|
|
|
// ValidateIP returns whether IP is an IPv4/6 address in non-reserved, public ranges.
|
|
func ValidateIP(ip netip.Addr) bool {
|
|
switch {
|
|
// IPv4: check if IPv4 in reserved nets
|
|
case ip.Is4():
|
|
for _, reserved := range IPv4Reserved {
|
|
if reserved.Contains(ip) {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
|
|
// IPv6: check if IP in IPv6 reserved nets
|
|
case ip.Is6():
|
|
for _, reserved := range IPv6Reserved {
|
|
if reserved.Contains(ip) {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
|
|
// Assume malicious by default
|
|
default:
|
|
return false
|
|
}
|
|
}
|