mirror of https://github.com/oxen-io/oxen-core.git
125 lines
3.9 KiB
C++
125 lines
3.9 KiB
C++
// Copyright (c) 2006-2013, Andrey N. Sabelnikov, www.sabelnikov.net
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// * Neither the name of the Andrey N. Sabelnikov nor the
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// names of its contributors may be used to endorse or promote products
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// derived from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER BE LIABLE FOR ANY
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// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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#pragma once
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#include <string>
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#include <boost/algorithm/string/predicate.hpp>
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#include <boost/asio/ip/address_v6.hpp>
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#include "../int-util.h"
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namespace epee
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{
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namespace net_utils
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{
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inline
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bool is_ipv6_local(const std::string& ip)
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{
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#if BOOST_VERSION >= 106600
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auto addr = boost::asio::ip::make_address_v6(ip);
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#else
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auto addr = boost::asio::ip::address_v6::from_string(ip);
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#endif
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// ipv6 link-local unicast addresses are fe80::/10
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bool is_link_local = addr.is_link_local();
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auto addr_bytes = addr.to_bytes();
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// ipv6 unique local unicast addresses start with fc00::/7 -- (fcXX or fdXX)
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bool is_unique_local_unicast = (addr_bytes[0] == 0xfc || addr_bytes[0] == 0xfd);
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return is_link_local || is_unique_local_unicast;
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}
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inline
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bool is_ipv6_loopback(const std::string& ip)
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{
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// ipv6 loopback is ::1
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return boost::asio::ip::address_v6::from_string(ip).is_loopback();
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}
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inline
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bool is_ip_local(uint32_t ip)
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{
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ip = SWAP32LE(ip);
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/*
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private network ranges:
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10.0.0.0/8
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172.16.0.0/12
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192.168.0.0/16
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carrier-grade NAT network range:
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100.64.0.0/10
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link-local addresses:
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169.254.0.0/16
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*/
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// Extremely bizarrely, IPs are stored in little-endian order in epee, which is just plain
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// wrong, but we have to deal with. (Jason)
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if ((ip & 0xff) == 0x0a) // 10.0.0.0/8
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return true;
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if ((ip & 0xf0ff) == 0x10ac) // 172.16.0.0/12 (0xf0ff looks strange because of the little endian nonsense)
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return true;
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if ((ip & 0xffff) == 0xa8c0) // 192.168.0.0/16
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return true;
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if ((ip & 0xc0ff) == 0x4064) // 100.64.0.0/10
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return true;
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if ((ip & 0xffff) == 0xfea9) // 169.254.0.0/16
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return true;
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return false;
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}
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inline
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bool is_ip_loopback(uint32_t ip)
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{
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ip = SWAP32LE(ip);
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if ((ip & 0xff) == 0x7f) // 127.0.0.0/8
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return true;
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return false;
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}
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inline
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bool is_ip_public(uint32_t ip)
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{
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return !(
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is_ip_local(ip) ||
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is_ip_loopback(ip) ||
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(ip & 0xff) == 0x00 || // 0.0.0.0/8 addresses are "current network" addresses valid only as a source but not destination
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(ip & 0xe0) == 0xe0); // 224.0.0.0/3 -- includes both 224/4 multicast and 240/4 reserved blocks
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}
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}
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}
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