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347 lines
10 KiB
347 lines
10 KiB
/* |
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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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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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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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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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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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bool InetAddress::isDefaultRoute() 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 ((_sa.sin.sin_addr.s_addr == 0)&&(_sa.sin.sin_port == 0)); |
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else if (_sa.saddr.sa_family == AF_INET6) |
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return ((Utils::isZero(_sa.sin6.sin6_addr.s6_addr,16))&&(_sa.sin6.sin6_port == 0)); |
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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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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(_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 >> 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) ? 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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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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