mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2024-12-23 23:02:23 +00:00
254 lines
10 KiB
C++
254 lines
10 KiB
C++
/*
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* ZeroTier One - Network Virtualization Everywhere
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* Copyright (C) 2011-2015 ZeroTier, 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 as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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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. If not, see <http://www.gnu.org/licenses/>.
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*
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* --
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*
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* ZeroTier may be used and distributed under the terms of the GPLv3, which
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* are available at: http://www.gnu.org/licenses/gpl-3.0.html
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*
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* If you would like to embed ZeroTier into a commercial application or
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* redistribute it in a modified binary form, please contact ZeroTier Networks
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* LLC. Start here: http://www.zerotier.com/
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdint.h>
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#include <string>
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#include "Constants.hpp"
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#include "InetAddress.hpp"
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#include "Utils.hpp"
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namespace ZeroTier {
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const InetAddress InetAddress::LO4("127.0.0.1",0);
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const InetAddress InetAddress::LO6("::1",0);
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const InetAddress InetAddress::DEFAULT4((uint32_t)0,0);
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const InetAddress InetAddress::DEFAULT6((const void *)0,16,0);
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void InetAddress::set(const std::string &ip,unsigned int port)
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throw()
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{
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if (ip.find(':') != std::string::npos) {
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struct sockaddr_in6 sin6;
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memset(&sin6,0,sizeof(sin6));
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sin6.sin6_family = AF_INET6;
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sin6.sin6_port = Utils::hton((uint16_t)port);
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if (inet_pton(AF_INET6,ip.c_str(),(void *)&(sin6.sin6_addr.s6_addr)) <= 0)
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memset(this,0,sizeof(InetAddress));
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else *this = sin6;
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} else {
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struct sockaddr_in sin;
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memset(&sin,0,sizeof(sin));
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sin.sin_family = AF_INET;
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sin.sin_port = Utils::hton((uint16_t)port);
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if (inet_pton(AF_INET,ip.c_str(),(void *)&(sin.sin_addr.s_addr)) <= 0)
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memset(this,0,sizeof(InetAddress));
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else *this = sin;
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}
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}
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void InetAddress::set(const void *ipBytes,unsigned int ipLen,unsigned int port)
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throw()
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{
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memset(this,0,sizeof(InetAddress));
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if (ipLen == 4) {
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setV4();
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if (ipBytes)
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memcpy(rawIpData(),ipBytes,4);
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setPort(port);
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} else if (ipLen == 16) {
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setV6();
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if (ipBytes)
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memcpy(rawIpData(),ipBytes,16);
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setPort(port);
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}
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}
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bool InetAddress::isLinkLocal() const
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throw()
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{
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static const unsigned char v6llPrefix[8] = { 0xfe,0x80,0x00,0x00,0x00,0x00,0x00,0x00 };
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switch(ss_family) {
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case AF_INET:
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return ((Utils::ntoh((uint32_t)reinterpret_cast<const struct sockaddr_in *>(this)->sin_addr.s_addr) & 0xffff0000) == 0xa9fe0000);
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case AF_INET6:
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return (memcmp(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr,v6llPrefix,8) == 0);
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}
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return false;
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}
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std::string InetAddress::toString() const
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{
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char buf[128];
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switch(ss_family) {
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case AF_INET:
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Utils::snprintf(buf,sizeof(buf),"%d.%d.%d.%d/%d",
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(int)(reinterpret_cast<const unsigned char *>(&(reinterpret_cast<const struct sockaddr_in *>(this)->sin_addr.s_addr)))[0],
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(int)(reinterpret_cast<const unsigned char *>(&(reinterpret_cast<const struct sockaddr_in *>(this)->sin_addr.s_addr)))[1],
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(int)(reinterpret_cast<const unsigned char *>(&(reinterpret_cast<const struct sockaddr_in *>(this)->sin_addr.s_addr)))[2],
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(int)(reinterpret_cast<const unsigned char *>(&(reinterpret_cast<const struct sockaddr_in *>(this)->sin_addr.s_addr)))[3],
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(int)Utils::ntoh((uint16_t)(reinterpret_cast<const struct sockaddr_in *>(this)->sin_port))
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);
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return std::string(buf);
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case AF_INET6:
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Utils::snprintf(buf,sizeof(buf),"%.2x%.2x:%.2x%.2x:%.2x%.2x:%.2x%.2x:%.2x%.2x:%.2x%.2x:%.2x%.2x:%.2x%.2x/%d",
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(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[0]),
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(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[1]),
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(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[2]),
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(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[3]),
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(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[4]),
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(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[5]),
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(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[6]),
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(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[7]),
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(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[8]),
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(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[9]),
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(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[10]),
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(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[11]),
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(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[12]),
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(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[13]),
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(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[14]),
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(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[15]),
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(int)Utils::ntoh((uint16_t)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_port))
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);
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return std::string(buf);
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}
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return std::string();
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}
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std::string InetAddress::toIpString() const
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{
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char buf[128];
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switch(ss_family) {
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case AF_INET:
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Utils::snprintf(buf,sizeof(buf),"%d.%d.%d.%d",
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(int)(reinterpret_cast<const unsigned char *>(&(reinterpret_cast<const struct sockaddr_in *>(this)->sin_addr.s_addr)))[0],
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(int)(reinterpret_cast<const unsigned char *>(&(reinterpret_cast<const struct sockaddr_in *>(this)->sin_addr.s_addr)))[1],
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(int)(reinterpret_cast<const unsigned char *>(&(reinterpret_cast<const struct sockaddr_in *>(this)->sin_addr.s_addr)))[2],
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(int)(reinterpret_cast<const unsigned char *>(&(reinterpret_cast<const struct sockaddr_in *>(this)->sin_addr.s_addr)))[3]
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);
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return std::string(buf);
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case AF_INET6:
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Utils::snprintf(buf,sizeof(buf),"%.2x%.2x:%.2x%.2x:%.2x%.2x:%.2x%.2x:%.2x%.2x:%.2x%.2x:%.2x%.2x:%.2x%.2x",
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(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[0]),
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(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[1]),
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(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[2]),
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(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[3]),
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(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[4]),
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(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[5]),
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(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[6]),
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(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[7]),
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(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[8]),
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(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[9]),
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(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[10]),
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(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[11]),
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(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[12]),
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(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[13]),
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(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[14]),
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(int)(reinterpret_cast<const struct sockaddr_in6 *>(this)->sin6_addr.s6_addr[15])
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);
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return std::string(buf);
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}
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return std::string();
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}
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void InetAddress::fromString(const std::string &ipSlashPort)
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{
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std::size_t slashAt = ipSlashPort.find('/');
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if ((slashAt == std::string::npos)||(slashAt >= ipSlashPort.length()))
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set(ipSlashPort,0);
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else {
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long p = strtol(ipSlashPort.substr(slashAt+1).c_str(),(char **)0,10);
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if ((p > 0)&&(p <= 0xffff))
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set(ipSlashPort.substr(0,slashAt),(unsigned int)p);
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else set(ipSlashPort.substr(0,slashAt),0);
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}
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}
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InetAddress InetAddress::netmask() const
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throw()
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{
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InetAddress r(*this);
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switch(r.ss_family) {
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case AF_INET:
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reinterpret_cast<struct sockaddr_in *>(&r)->sin_addr.s_addr = Utils::hton((uint32_t)(0xffffffff << (32 - netmaskBits())));
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break;
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case AF_INET6: {
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unsigned char *bf = reinterpret_cast<unsigned char *>(reinterpret_cast<struct sockaddr_in6 *>(&r)->sin6_addr.s6_addr);
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signed int bitsLeft = (signed int)netmaskBits();
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for(unsigned int i=0;i<16;++i) {
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if (bitsLeft > 0) {
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bf[i] |= (unsigned char)((bitsLeft >= 8) ? 0x00 : (0xff >> bitsLeft));
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bitsLeft -= 8;
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}
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}
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} break;
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}
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return r;
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}
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InetAddress InetAddress::broadcast() const
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throw()
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{
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InetAddress r(*this);
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switch(r.ss_family) {
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case AF_INET:
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reinterpret_cast<struct sockaddr_in *>(&r)->sin_addr.s_addr |= Utils::hton((uint32_t)(0xffffffff >> netmaskBits()));
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break;
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case AF_INET6: {
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unsigned char *bf = reinterpret_cast<unsigned char *>(reinterpret_cast<struct sockaddr_in6 *>(&r)->sin6_addr.s6_addr);
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signed int bitsLeft = (signed int)netmaskBits();
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for(unsigned int i=0;i<16;++i) {
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if (bitsLeft > 0) {
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bf[i] |= (unsigned char)((bitsLeft >= 8) ? 0x00 : (0xff >> bitsLeft));
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bitsLeft -= 8;
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}
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}
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} break;
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}
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return r;
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}
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InetAddress InetAddress::makeIpv6LinkLocal(const MAC &mac)
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throw()
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{
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struct sockaddr_in6 sin6;
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sin6.sin6_family = AF_INET6;
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sin6.sin6_addr.s6_addr[0] = 0xfe;
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sin6.sin6_addr.s6_addr[1] = 0x80;
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sin6.sin6_addr.s6_addr[2] = 0x00;
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sin6.sin6_addr.s6_addr[3] = 0x00;
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sin6.sin6_addr.s6_addr[4] = 0x00;
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sin6.sin6_addr.s6_addr[5] = 0x00;
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sin6.sin6_addr.s6_addr[6] = 0x00;
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sin6.sin6_addr.s6_addr[7] = 0x00;
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sin6.sin6_addr.s6_addr[8] = mac[0] & 0xfd;
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sin6.sin6_addr.s6_addr[9] = mac[1];
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sin6.sin6_addr.s6_addr[10] = mac[2];
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sin6.sin6_addr.s6_addr[11] = 0xff;
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sin6.sin6_addr.s6_addr[12] = 0xfe;
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sin6.sin6_addr.s6_addr[13] = mac[3];
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sin6.sin6_addr.s6_addr[14] = mac[4];
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sin6.sin6_addr.s6_addr[15] = mac[5];
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sin6.sin6_port = Utils::hton((uint16_t)64);
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return InetAddress(sin6);
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}
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} // namespace ZeroTier
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