mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2024-12-23 14:52:24 +00:00
312 lines
9.0 KiB
C++
312 lines
9.0 KiB
C++
/*
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* ZeroTier One - Global Peer to Peer Ethernet
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* Copyright (C) 2011-2014 ZeroTier Networks LLC
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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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void InetAddress::set(const std::string &ip,unsigned int port)
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throw()
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{
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memset(&_sa,0,sizeof(_sa));
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if (ip.find(':') != std::string::npos) {
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_sa.sin6.sin6_family = AF_INET6;
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_sa.sin6.sin6_port = Utils::hton((uint16_t)port);
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if (inet_pton(AF_INET6,ip.c_str(),(void *)&(_sa.sin6.sin6_addr.s6_addr)) <= 0)
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_sa.saddr.sa_family = 0;
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} else {
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_sa.sin.sin_family = AF_INET;
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_sa.sin.sin_port = Utils::hton((uint16_t)port);
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if (inet_pton(AF_INET,ip.c_str(),(void *)&(_sa.sin.sin_addr.s_addr)) <= 0)
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_sa.saddr.sa_family = 0;
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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(&_sa,0,sizeof(_sa));
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if (ipLen == 4) {
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setV4();
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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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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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if (_sa.saddr.sa_family == AF_INET)
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return ((Utils::ntoh((uint32_t)_sa.sin.sin_addr.s_addr) & 0xffff0000) == 0xa9fe0000);
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else if (_sa.saddr.sa_family == AF_INET6) {
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if (_sa.sin6.sin6_addr.s6_addr[0] != 0xfe) return false;
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if (_sa.sin6.sin6_addr.s6_addr[1] != 0x80) return false;
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if (_sa.sin6.sin6_addr.s6_addr[2] != 0x00) return false;
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if (_sa.sin6.sin6_addr.s6_addr[3] != 0x00) return false;
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if (_sa.sin6.sin6_addr.s6_addr[4] != 0x00) return false;
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if (_sa.sin6.sin6_addr.s6_addr[5] != 0x00) return false;
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if (_sa.sin6.sin6_addr.s6_addr[6] != 0x00) return false;
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if (_sa.sin6.sin6_addr.s6_addr[7] != 0x00) return false;
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return true;
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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],buf2[128];
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switch(_sa.saddr.sa_family) {
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case AF_INET:
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#ifdef __WINDOWS__
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if (inet_ntop(AF_INET,(PVOID)&(_sa.sin.sin_addr.s_addr),buf,sizeof(buf))) {
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#else
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if (inet_ntop(AF_INET,(const void *)&(_sa.sin.sin_addr.s_addr),buf,sizeof(buf))) {
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#endif
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Utils::snprintf(buf2,sizeof(buf2),"%s/%u",buf,(unsigned int)ntohs(_sa.sin.sin_port));
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return std::string(buf2);
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}
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break;
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case AF_INET6:
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#ifdef __WINDOWS__
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if (inet_ntop(AF_INET6,(PVOID)&(_sa.sin6.sin6_addr.s6_addr),buf,sizeof(buf))) {
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#else
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if (inet_ntop(AF_INET6,(const void *)&(_sa.sin6.sin6_addr.s6_addr),buf,sizeof(buf))) {
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#endif
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Utils::snprintf(buf2,sizeof(buf2),"%s/%u",buf,(unsigned int)ntohs(_sa.sin6.sin6_port));
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return std::string(buf2);
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}
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break;
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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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std::string InetAddress::toIpString() const
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{
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char buf[128];
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switch(_sa.saddr.sa_family) {
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case AF_INET:
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#ifdef __WINDOWS__
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if (inet_ntop(AF_INET,(PVOID)&(_sa.sin.sin_addr.s_addr),buf,sizeof(buf)))
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return std::string(buf);
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#else
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if (inet_ntop(AF_INET,(const void *)&(_sa.sin.sin_addr.s_addr),buf,sizeof(buf)))
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return std::string(buf);
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#endif
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break;
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case AF_INET6:
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#ifdef __WINDOWS__
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if (inet_ntop(AF_INET6,(PVOID)&(_sa.sin6.sin6_addr.s6_addr),buf,sizeof(buf)))
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return std::string(buf);
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#else
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if (inet_ntop(AF_INET6,(const void *)&(_sa.sin6.sin6_addr.s6_addr),buf,sizeof(buf)))
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return std::string(buf);
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#endif
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break;
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}
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return std::string();
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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(_sa.saddr.sa_family) {
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case AF_INET:
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r._sa.sin.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 = (unsigned char *)r._sa.sin6.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) ? 0xff : (0xff << (8 - bitsLeft)));
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bitsLeft -= 8;
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} else bf[i] = (unsigned char)0;
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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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bool InetAddress::sameNetworkAs(const InetAddress &ipnet) const
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throw()
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{
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if (_sa.saddr.sa_family != ipnet._sa.saddr.sa_family)
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return false;
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unsigned int bits = netmaskBits();
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if (bits != ipnet.netmaskBits())
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return false;
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if (!bits)
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return true;
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switch(_sa.saddr.sa_family) {
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case AF_INET:
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if (bits >= 32) bits = 32;
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break;
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case AF_INET6:
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if (bits >= 128) bits = 128;
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break;
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default:
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return false;
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}
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const uint8_t *a = (const uint8_t *)rawIpData();
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const uint8_t *b = (const uint8_t *)ipnet.rawIpData();
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while (bits >= 8) {
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if (*(a++) != *(b++))
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return false;
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bits -= 8;
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}
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bits = 8 - bits;
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return ((*a >> bits) == (*b >> bits));
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}
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bool InetAddress::within(const InetAddress &ipnet) const
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throw()
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{
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if (_sa.saddr.sa_family != ipnet._sa.saddr.sa_family)
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return false;
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unsigned int bits = ipnet.netmaskBits();
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switch(_sa.saddr.sa_family) {
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case AF_INET:
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if (bits > 32) return false;
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break;
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case AF_INET6:
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if (bits > 128) return false;
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break;
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default: return false;
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}
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const uint8_t *a = (const uint8_t *)rawIpData();
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const uint8_t *b = (const uint8_t *)ipnet.rawIpData();
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while (bits >= 8) {
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if (*(a++) != *(b++))
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return false;
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bits -= 8;
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}
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if (bits) {
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uint8_t mask = ((0xff << (8 - bits)) & 0xff);
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return ((*a & mask) == (*b & mask));
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} else return true;
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}
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bool InetAddress::operator==(const InetAddress &a) const
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throw()
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{
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if (_sa.saddr.sa_family == AF_INET) {
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if (a._sa.saddr.sa_family == AF_INET)
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return ((_sa.sin.sin_addr.s_addr == a._sa.sin.sin_addr.s_addr)&&(_sa.sin.sin_port == a._sa.sin.sin_port));
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return false;
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} else if (_sa.saddr.sa_family == AF_INET6) {
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if (a._sa.saddr.sa_family == AF_INET6) {
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if (_sa.sin6.sin6_port == a._sa.sin6.sin6_port)
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return (!memcmp(_sa.sin6.sin6_addr.s6_addr,a._sa.sin6.sin6_addr.s6_addr,sizeof(_sa.sin6.sin6_addr.s6_addr)));
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}
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return false;
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} else return (memcmp(&_sa,&a._sa,sizeof(_sa)) == 0);
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}
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bool InetAddress::operator<(const InetAddress &a) const
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throw()
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{
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if (_sa.saddr.sa_family < a._sa.saddr.sa_family)
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return true;
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else if (_sa.saddr.sa_family == a._sa.saddr.sa_family) {
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if (_sa.saddr.sa_family == AF_INET) {
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unsigned long x = Utils::ntoh((uint32_t)_sa.sin.sin_addr.s_addr);
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unsigned long y = Utils::ntoh((uint32_t)a._sa.sin.sin_addr.s_addr);
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if (x == y)
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return (Utils::ntoh((uint16_t)_sa.sin.sin_port) < Utils::ntoh((uint16_t)a._sa.sin.sin_port));
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else return (x < y);
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} else if (_sa.saddr.sa_family == AF_INET6) {
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int cmp = (int)memcmp(_sa.sin6.sin6_addr.s6_addr,a._sa.sin6.sin6_addr.s6_addr,16);
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if (cmp == 0)
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return (Utils::ntoh((uint16_t)_sa.sin6.sin6_port) < Utils::ntoh((uint16_t)a._sa.sin6.sin6_port));
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else return (cmp < 0);
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} else return (memcmp(&_sa,&a._sa,sizeof(_sa)) < 0);
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}
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return false;
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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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InetAddress ip;
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ip._sa.saddr.sa_family = AF_INET6;
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ip._sa.sin6.sin6_addr.s6_addr[0] = 0xfe;
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ip._sa.sin6.sin6_addr.s6_addr[1] = 0x80;
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ip._sa.sin6.sin6_addr.s6_addr[2] = 0x00;
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ip._sa.sin6.sin6_addr.s6_addr[3] = 0x00;
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ip._sa.sin6.sin6_addr.s6_addr[4] = 0x00;
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ip._sa.sin6.sin6_addr.s6_addr[5] = 0x00;
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ip._sa.sin6.sin6_addr.s6_addr[6] = 0x00;
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ip._sa.sin6.sin6_addr.s6_addr[7] = 0x00;
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ip._sa.sin6.sin6_addr.s6_addr[8] = mac[0] & 0xfd;
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ip._sa.sin6.sin6_addr.s6_addr[9] = mac[1];
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ip._sa.sin6.sin6_addr.s6_addr[10] = mac[2];
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ip._sa.sin6.sin6_addr.s6_addr[11] = 0xff;
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ip._sa.sin6.sin6_addr.s6_addr[12] = 0xfe;
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ip._sa.sin6.sin6_addr.s6_addr[13] = mac[3];
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ip._sa.sin6.sin6_addr.s6_addr[14] = mac[4];
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ip._sa.sin6.sin6_addr.s6_addr[15] = mac[5];
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ip._sa.sin6.sin6_port = Utils::hton((uint16_t)64);
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return ip;
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}
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} // namespace ZeroTier
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