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108 lines
3.3 KiB
C++
108 lines
3.3 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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// IP addresses are kept in network byte order
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// Masks below are little endian
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// -> convert from network byte order to host byte order before comparing
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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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auto addr = boost::asio::ip::address_v6::from_string(ip);
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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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local ip area
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10.0.0.0 <20> 10.255.255.255
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172.16.0.0 <20> 172.31.255.255
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192.168.0.0 <20> 192.168.255.255
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*/
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if( (ip | 0xffffff00) == 0xffffff0a)
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return true;
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if( (ip | 0xffff0000) == 0xffffa8c0)
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return true;
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if( (ip | 0xffffff00) == 0xffffffac)
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{
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uint32_t second_num = (ip >> 8) & 0xff;
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if(second_num >= 16 && second_num <= 31 )
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return true;
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}
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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 | 0xffffff00) == 0xffffff7f)
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return true;
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//MAKE_IP
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/*
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loopback ip
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127.0.0.0 <20> 127.255.255.255
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*/
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return false;
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}
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}
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}
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