mirror of
https://github.com/OpenVPN/openvpn3.git
synced 2024-09-20 20:13:05 +02:00
128 lines
3.7 KiB
C++
128 lines
3.7 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) 2012-2016 OpenVPN Technologies, 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 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 General Public License for more details.
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//
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// You should have received a copy of the GNU 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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#ifndef OPENVPN_COMMON_HOSTPORT_H
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#define OPENVPN_COMMON_HOSTPORT_H
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#include <string>
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#include <openvpn/common/exception.hpp>
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#include <openvpn/common/number.hpp>
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#include <openvpn/common/options.hpp>
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#include <openvpn/common/unicode.hpp>
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namespace openvpn {
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namespace HostPort {
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OPENVPN_EXCEPTION(host_port_error);
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inline bool is_valid_port(const unsigned int port)
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{
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return port < 65536;
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}
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inline bool is_valid_port(const std::string& port, unsigned int *value = nullptr)
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{
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return parse_number_validate<unsigned int>(port, 5, 1, 65535, value);
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}
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inline void validate_port(const std::string& port, const std::string& title, unsigned int *value = nullptr)
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{
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if (!is_valid_port(port, value))
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OPENVPN_THROW(host_port_error, "bad " << title << " port number: " << Unicode::utf8_printable(port, 16));
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}
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inline void validate_port(const unsigned int port, const std::string& title)
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{
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if (!is_valid_port(port))
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OPENVPN_THROW(host_port_error, "bad " << title << " port number: " << port);
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}
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inline unsigned short parse_port(const std::string& port, const std::string& title)
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{
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unsigned int ret = 0;
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validate_port(port, title, &ret);
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return ret;
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}
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// An IP address is also considered to be a valid host
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inline bool is_valid_host_char(const char c)
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{
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return (c >= 'a' && c <= 'z')
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|| (c >= 'A' && c <= 'Z')
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|| (c >= '0' && c <= '9')
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|| c == '.'
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|| c == '-'
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|| c == ':'; // for IPv6
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}
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inline bool is_valid_host(const std::string& host)
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{
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if (!host.length() || host.length() > 256)
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return false;
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for (const auto &c : host)
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{
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if (!is_valid_host_char(c))
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return false;
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}
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return true;
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}
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inline void validate_host(const std::string& host, const std::string& title)
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{
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if (!is_valid_host(host))
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OPENVPN_THROW(host_port_error, "bad " << title << " host: " << Unicode::utf8_printable(host, 64));
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}
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inline bool split_host_port(const std::string& str,
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std::string& host,
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std::string& port,
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const std::string& default_port,
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unsigned int *port_save = nullptr)
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{
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const size_t pos = str.find_last_of(':');
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const size_t cb = str.find_last_of(']');
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if (pos != std::string::npos && (cb == std::string::npos || pos > cb))
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{
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// host:port or [host]:port specified
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host = str.substr(0, pos);
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port = str.substr(pos + 1);
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}
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else if (!default_port.empty())
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{
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// only host specified
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host = str;
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port = default_port;
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}
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else
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return false;
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// unbracket host
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if (host.length() >= 2 && host[0] == '[' && host[host.length()-1] == ']')
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host = host.substr(1, host.length()-2);
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return is_valid_host(host) && is_valid_port(port, port_save);
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}
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}
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}
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#endif
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