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357 lines
9.1 KiB
357 lines
9.1 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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#ifndef ZT_INETADDRESS_HPP |
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#define ZT_INETADDRESS_HPP |
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#include <stdlib.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 "Utils.hpp" |
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#include "MAC.hpp" |
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#ifdef __WINDOWS__ |
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#include <WinSock2.h> |
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#include <WS2tcpip.h> |
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#include <Windows.h> |
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#else |
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#include <netinet/in.h> |
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#include <arpa/inet.h> |
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#endif |
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namespace ZeroTier { |
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/** |
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* Wrapper for sockaddr structures for IPV4 and IPV6 |
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* |
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* Note: this class is raw memcpy'able, which is used in a couple places. |
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*/ |
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class InetAddress |
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{ |
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public: |
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/** |
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* Address type |
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*/ |
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enum AddressType |
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{ |
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TYPE_NULL = 0, |
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TYPE_IPV4 = AF_INET, |
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TYPE_IPV6 = AF_INET6 |
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}; |
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/** |
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* Loopback IPv4 address (no port) |
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*/ |
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static const InetAddress LO4; |
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/** |
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* Loopback IPV6 address (no port) |
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*/ |
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static const InetAddress LO6; |
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/** |
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* 0.0.0.0/0 |
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*/ |
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static const InetAddress DEFAULT4; |
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/** |
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* ::/0 |
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*/ |
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static const InetAddress DEFAULT6; |
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InetAddress() throw() { memset(&_sa,0,sizeof(_sa)); } |
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InetAddress(const InetAddress &a) throw() { memcpy(&_sa,&a._sa,sizeof(_sa)); } |
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InetAddress(const struct sockaddr *sa) throw() { this->set(sa); } |
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InetAddress(const void *ipBytes,unsigned int ipLen,unsigned int port) throw() { this->set(ipBytes,ipLen,port); } |
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InetAddress(const uint32_t ipv4,unsigned int port) throw() { this->set(&ipv4,4,port); } |
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InetAddress(const std::string &ip,unsigned int port) throw() { this->set(ip,port); } |
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InetAddress(const std::string &ipSlashPort) throw() { this->fromString(ipSlashPort); } |
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InetAddress(const char *ipSlashPort) throw() { this->fromString(std::string(ipSlashPort)); } |
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inline InetAddress &operator=(const InetAddress &a) |
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throw() |
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{ |
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memcpy(&_sa,&a._sa,sizeof(_sa)); |
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return *this; |
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} |
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/** |
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* Set from an OS-level sockaddr structure |
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* |
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* @param sa Socket address (V4 or V6) |
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*/ |
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inline void set(const struct sockaddr *sa) |
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throw() |
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{ |
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switch(sa->sa_family) { |
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case AF_INET: memcpy(&_sa.sin,sa,sizeof(struct sockaddr_in)); break; |
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case AF_INET6: memcpy(&_sa.sin6,sa,sizeof(struct sockaddr_in6)); break; |
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default: memset(&_sa,0,sizeof(_sa)); break; |
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} |
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} |
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/** |
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* Set from a string-format IP and a port |
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* |
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* @param ip IP address in V4 or V6 ASCII notation |
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* @param port Port or 0 for none |
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*/ |
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void set(const std::string &ip,unsigned int port) |
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throw(); |
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/** |
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* Set from a raw IP and port number |
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* |
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* @param ipBytes Bytes of IP address in network byte order |
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* @param ipLen Length of IP address: 4 or 16 |
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* @param port Port number or 0 for none |
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*/ |
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void set(const void *ipBytes,unsigned int ipLen,unsigned int port) |
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throw(); |
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/** |
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* Set the port component |
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* |
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* @param port Port, 0 to 65535 |
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*/ |
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inline void setPort(unsigned int port) |
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throw() |
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{ |
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if (_sa.saddr.sa_family == AF_INET) |
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_sa.sin.sin_port = Utils::hton((uint16_t)port); |
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else if (_sa.saddr.sa_family == AF_INET6) |
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_sa.sin6.sin6_port = Utils::hton((uint16_t)port); |
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} |
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/** |
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* @return True if this is a link-local IP address |
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*/ |
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bool isLinkLocal() const |
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throw(); |
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/** |
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* @return True if this ip/netmask would represent a default route (e.g. 0.0.0.0/0) |
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*/ |
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bool isDefaultRoute() const |
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throw(); |
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/** |
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* @return True if this is a loopback address |
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*/ |
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inline bool isLoopback() const |
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throw() |
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{ |
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return ((*this == LO4)||(*this == LO6)); |
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} |
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/** |
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* @return ASCII IP/port format representation |
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*/ |
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std::string toString() const; |
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/** |
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* @param ipSlashPort ASCII IP/port format notation |
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*/ |
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void fromString(const std::string &ipSlashPort); |
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/** |
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* @return IP portion only, in ASCII string format |
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*/ |
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std::string toIpString() const; |
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/** |
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* @return Port or 0 if no port component defined |
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*/ |
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inline unsigned int port() const |
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throw() |
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{ |
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switch(_sa.saddr.sa_family) { |
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case AF_INET: return Utils::ntoh((uint16_t)_sa.sin.sin_port); |
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case AF_INET6: return Utils::ntoh((uint16_t)_sa.sin6.sin6_port); |
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default: return 0; |
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} |
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} |
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/** |
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* Alias for port() |
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* |
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* This just aliases port() to make code more readable when netmask bits |
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* are stuffed there, as they are in Network, EthernetTap, and a few other |
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* spots. |
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* |
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* @return Netmask bits |
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*/ |
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inline unsigned int netmaskBits() const throw() { return port(); } |
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/** |
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* Construct a full netmask as an InetAddress |
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*/ |
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InetAddress netmask() const |
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throw(); |
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/** |
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* @return True if this is an IPv4 address |
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*/ |
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inline bool isV4() const throw() { return (_sa.saddr.sa_family == AF_INET); } |
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/** |
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* @return True if this is an IPv6 address |
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*/ |
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inline bool isV6() const throw() { return (_sa.saddr.sa_family == AF_INET6); } |
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/** |
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* @return Address type or TYPE_NULL if not defined |
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*/ |
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inline AddressType type() const throw() { return (AddressType)_sa.saddr.sa_family; } |
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/** |
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* Force type to IPv4 |
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*/ |
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inline void setV4() throw() { _sa.saddr.sa_family = AF_INET; } |
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/** |
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* Force type to IPv6 |
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*/ |
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inline void setV6() throw() { _sa.saddr.sa_family = AF_INET6; } |
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/** |
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* @return Raw sockaddr structure |
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*/ |
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inline struct sockaddr *saddr() throw() { return &(_sa.saddr); } |
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inline const struct sockaddr *saddr() const throw() { return &(_sa.saddr); } |
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/** |
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* @return Length of sockaddr_in if IPv4, sockaddr_in6 if IPv6 |
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*/ |
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inline unsigned int saddrLen() const |
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throw() |
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{ |
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switch(_sa.saddr.sa_family) { |
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case AF_INET: return sizeof(struct sockaddr_in); |
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case AF_INET6: return sizeof(struct sockaddr_in6); |
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default: return 0; |
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} |
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} |
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/** |
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* @return Combined length of internal structure, room for either V4 or V6 |
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*/ |
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inline unsigned int saddrSpaceLen() const throw() { return sizeof(_sa); } |
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/** |
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* @return Raw sockaddr_in structure (valid if IPv4) |
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*/ |
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inline const struct sockaddr_in *saddr4() const throw() { return &(_sa.sin); } |
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/** |
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* @return Raw sockaddr_in6 structure (valid if IPv6) |
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*/ |
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inline const struct sockaddr_in6 *saddr6() const throw() { return &(_sa.sin6); } |
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/** |
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* @return Raw IP address (4 bytes for IPv4, 16 bytes for IPv6) |
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*/ |
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inline void *rawIpData() throw() { return ((_sa.saddr.sa_family == AF_INET) ? (void *)(&(_sa.sin.sin_addr.s_addr)) : (void *)_sa.sin6.sin6_addr.s6_addr); } |
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inline const void *rawIpData() const throw() { return ((_sa.saddr.sa_family == AF_INET) ? (void *)(&(_sa.sin.sin_addr.s_addr)) : (void *)_sa.sin6.sin6_addr.s6_addr); } |
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/** |
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* Compare only the IP portions of addresses, ignoring port/netmask |
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* |
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* @param a Address to compare |
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* @return True if both addresses are of the same (valid) type and their IPs match |
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*/ |
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inline bool ipsEqual(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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switch(_sa.saddr.sa_family) { |
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case AF_INET: |
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return (_sa.sin.sin_addr.s_addr == a._sa.sin.sin_addr.s_addr); |
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case AF_INET6: |
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return (!memcmp(_sa.sin6.sin6_addr.s6_addr,a._sa.sin6.sin6_addr.s6_addr,16)); |
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} |
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} |
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return false; |
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} |
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/** |
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* Compare IP/netmask with another IP/netmask |
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* |
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* @param ipnet IP/netmask to compare with |
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* @return True if [netmask] bits match |
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*/ |
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bool sameNetworkAs(const InetAddress &ipnet) const |
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throw(); |
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/** |
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* Determine whether this address is within an ip/netmask |
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* |
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* @param ipnet IP/netmask |
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* @return True if this address is within this network |
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*/ |
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bool within(const InetAddress &ipnet) const |
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throw(); |
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/** |
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* Set to null/zero |
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*/ |
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inline void zero() throw() { memset(&_sa,0,sizeof(_sa)); } |
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/** |
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* @return True if address family is non-zero |
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*/ |
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inline operator bool() const throw() { return ((_sa.saddr.sa_family == AF_INET)||(_sa.saddr.sa_family == AF_INET6)); } |
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bool operator==(const InetAddress &a) const throw(); |
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inline bool operator!=(const InetAddress &a) const throw() { return !(*this == a); } |
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bool operator<(const InetAddress &a) const throw(); |
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inline bool operator>(const InetAddress &a) const throw() { return (a < *this); } |
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inline bool operator<=(const InetAddress &a) const throw() { return !(a < *this); } |
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inline bool operator>=(const InetAddress &a) const throw() { return !(*this < a); } |
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/** |
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* @param mac MAC address seed |
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* @return IPv6 link-local address |
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*/ |
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static InetAddress makeIpv6LinkLocal(const MAC &mac) |
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throw(); |
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private: |
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union { |
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struct sockaddr saddr; |
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struct sockaddr_in sin; |
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struct sockaddr_in6 sin6; |
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} _sa; |
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}; |
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} // namespace ZeroTier |
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#endif
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