mirror of
https://github.com/OpenVPN/openvpn3.git
synced 2024-09-20 04:02:15 +02:00
60 lines
3.0 KiB
C++
60 lines
3.0 KiB
C++
// OpenVPN -- An application to securely tunnel IP networks
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// over a single port, with support for SSL/TLS-based
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// session authentication and key exchange,
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// packet encryption, packet authentication, and
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// packet compression.
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//
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// Copyright (C) 2012-2022 OpenVPN Inc.
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//
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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 Version 3
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// as published by the Free Software Foundation.
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//
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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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//
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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 in the COPYING file.
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// If not, see <http://www.gnu.org/licenses/>.
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// Regular expressions for IPv4/v6
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// Source: http://stackoverflow.com/questions/53497/regular-expression-that-matches-valid-ipv6-addresses
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#ifndef OPENVPN_ADDR_REGEX_H
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#define OPENVPN_ADDR_REGEX_H
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#include <string>
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namespace openvpn::IP {
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inline std::string v4_regex()
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{
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const std::string ipv4seg = "(?:25[0-5]|(?:2[0-4]|1{0,1}[0-9]){0,1}[0-9])";
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return "(?:" + ipv4seg + "\\.){3,3}" + ipv4seg;
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}
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inline std::string v6_regex()
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{
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const std::string ipv6seg = "[0-9a-fA-F]{1,4}";
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// clang-format off
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return "(?:"
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"(?:" + ipv6seg + ":){7,7}" + ipv6seg + "|" // 1:2:3:4:5:6:7:8
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"(?:" + ipv6seg + ":){1,7}:|" // 1:: 1:2:3:4:5:6:7::
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"(?:" + ipv6seg + ":){1,6}:" + ipv6seg + "|" // 1::8 1:2:3:4:5:6::8 1:2:3:4:5:6::8
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"(?:" + ipv6seg + ":){1,5}(?::" + ipv6seg + "){1,2}|" // 1::7:8 1:2:3:4:5::7:8 1:2:3:4:5::8
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"(?:" + ipv6seg + ":){1,4}(?::" + ipv6seg + "){1,3}|" // 1::6:7:8 1:2:3:4::6:7:8 1:2:3:4::8
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"(?:" + ipv6seg + ":){1,3}(?::" + ipv6seg + "){1,4}|" // 1::5:6:7:8 1:2:3::5:6:7:8 1:2:3::8
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"(?:" + ipv6seg + ":){1,2}(?::" + ipv6seg + "){1,5}|" + // 1::4:5:6:7:8 1:2::4:5:6:7:8 1:2::8
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ipv6seg + ":(?:(?::" + ipv6seg + "){1,6})|" // 1::3:4:5:6:7:8 1::3:4:5:6:7:8 1::8
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":(?:(?::" + ipv6seg + "){1,7}|:)|" // ::2:3:4:5:6:7:8 ::2:3:4:5:6:7:8 ::8 ::
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"fe80:(?::" + ipv6seg + "){0,4}%[0-9a-zA-Z]{1,}|" // fe80::7:8%eth0 fe80::7:8%1 (link-local IPv6 addresses with zone index)
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"::(?:ffff(?::0{1,4}){0,1}:){0,1}" + v4_regex() + "|" // ::255.255.255.255 ::ffff:255.255.255.255 ::ffff:0:255.255.255.255 (IPv4-mapped IPv6 addresses and IPv4-translated addresses)
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"(?:" + ipv6seg + ":){1,4}:" + v4_regex() + // 2001:db8:3:4::192.0.2.33 64:ff9b::192.0.2.33 (IPv4-Embedded IPv6 Address)
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")";
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// clang-format on
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}
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} // namespace openvpn::IP
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#endif
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