/*
* ZeroTier One - Global Peer to Peer Ethernet
* Copyright (C) 2011-2014 ZeroTier Networks LLC
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* --
*
* ZeroTier may be used and distributed under the terms of the GPLv3, which
* are available at: http://www.gnu.org/licenses/gpl-3.0.html
*
* If you would like to embed ZeroTier into a commercial application or
* redistribute it in a modified binary form, please contact ZeroTier Networks
* LLC. Start here: http://www.zerotier.com/
*/
#ifndef ZT_INETADDRESS_HPP
#define ZT_INETADDRESS_HPP
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <string>
#include "Constants.hpp"
#include "Utils.hpp"
#include "MAC.hpp"
#ifdef __WINDOWS__
#include <WinSock2.h>
#include <WS2tcpip.h>
#include <Windows.h>
#else
#include <netinet/in.h>
#include <arpa/inet.h>
#endif
namespace ZeroTier {
/**
* Wrapper for sockaddr structures for IPV4 and IPV6
*/
class InetAddress
{
public:
/**
* Address type
*/
enum AddressType
{
TYPE_NULL = 0,
TYPE_IPV4 = AF_INET,
TYPE_IPV6 = AF_INET6
};
/**
* Loopback IPv4 address (no port)
*/
static const InetAddress LO4;
/**
* Loopback IPV6 address (no port)
*/
static const InetAddress LO6;
InetAddress()
throw()
{
memset(&_sa,0,sizeof(_sa));
}
InetAddress(const InetAddress &a)
throw()
{
memcpy(&_sa,&a._sa,sizeof(_sa));
}
InetAddress(const struct sockaddr *sa)
throw()
{
this->set(sa);
}
InetAddress(const void *ipBytes,unsigned int ipLen,unsigned int port)
throw()
{
this->set(ipBytes,ipLen,port);
}
InetAddress(const std::string &ip,unsigned int port)
throw()
{
this->set(ip,port);
}
InetAddress(const std::string &ipSlashPort)
throw()
{
this->fromString(ipSlashPort);
}
InetAddress(const char *ipSlashPort)
throw()
{
this->fromString(std::string(ipSlashPort));
}
inline InetAddress &operator=(const InetAddress &a)
throw()
{
memcpy(&_sa,&a._sa,sizeof(_sa));
return *this;
}
/**
* Set from an OS-level sockaddr structure
*
* @param sa Socket address (V4 or V6)
*/
inline void set(const struct sockaddr *sa)
throw()
{
switch(sa->sa_family) {
case AF_INET:
memcpy(&_sa.sin,sa,sizeof(struct sockaddr_in));
break;
case AF_INET6:
memcpy(&_sa.sin6,sa,sizeof(struct sockaddr_in6));
break;
default:
_sa.saddr.sa_family = 0;
break;
}
}
/**
* Set from a string-format IP and a port
*
* @param ip IP address in V4 or V6 ASCII notation
* @param port Port or 0 for none
*/
void set(const std::string &ip,unsigned int port)
throw();
/**
* Set from a raw IP and port number
*
* @param ipBytes Bytes of IP address in network byte order
* @param ipLen Length of IP address: 4 or 16
* @param port Port number or 0 for none
*/
inline void set(const void *ipBytes,unsigned int ipLen,unsigned int port)
throw()
{
_sa.saddr.sa_family = 0;
if (ipLen == 4) {
setV4();
memcpy(rawIpData(),ipBytes,4);
setPort(port);
} else if (ipLen == 16) {
setV6();
memcpy(rawIpData(),ipBytes,16);
setPort(port);
}
}
/**
* Set the port component
*
* @param port Port, 0 to 65535
*/
inline void setPort(unsigned int port)
throw()
{
if (_sa.saddr.sa_family == AF_INET)
_sa.sin.sin_port = htons((uint16_t)port);
else if (_sa.saddr.sa_family == AF_INET6)
_sa.sin6.sin6_port = htons((uint16_t)port);
}
/**
* @return True if this is a link-local IP address
*/
inline bool isLinkLocal() const
throw()
{
if (_sa.saddr.sa_family == AF_INET)
return ((Utils::ntoh((uint32_t)_sa.sin.sin_addr.s_addr) & 0xffff0000) == 0xa9fe0000);
else if (_sa.saddr.sa_family == AF_INET6) {
if (_sa.sin6.sin6_addr.s6_addr[0] != 0xfe) return false;
if (_sa.sin6.sin6_addr.s6_addr[1] != 0x80) return false;
if (_sa.sin6.sin6_addr.s6_addr[2] != 0x00) return false;
if (_sa.sin6.sin6_addr.s6_addr[3] != 0x00) return false;
if (_sa.sin6.sin6_addr.s6_addr[4] != 0x00) return false;
if (_sa.sin6.sin6_addr.s6_addr[5] != 0x00) return false;
if (_sa.sin6.sin6_addr.s6_addr[6] != 0x00) return false;
if (_sa.sin6.sin6_addr.s6_addr[7] != 0x00) return false;
return true;
}
return false;
}
/**
* @return ASCII IP/port format representation
*/
std::string toString() const;
/**
* @param ipSlashPort ASCII IP/port format notation
*/
void fromString(const std::string &ipSlashPort);
/**
* @return IP portion only, in ASCII string format
*/
std::string toIpString() const;
/**
* @return Port or 0 if no port component defined
*/
inline unsigned int port() const
throw()
{
switch(_sa.saddr.sa_family) {
case AF_INET:
return ntohs(_sa.sin.sin_port);
case AF_INET6:
return ntohs(_sa.sin6.sin6_port);
}
return 0;
}
/**
* Alias for port()
*
* This just aliases port() to make code more readable when netmask bits
* are stuffed there, as they are in Network, EthernetTap, and a few other
* spots.
*
* @return Netmask bits
*/
inline unsigned int netmaskBits() const
throw()
{
return port();
}
/**
* Construct a full netmask as an InetAddress
*/
inline InetAddress netmask() const
throw()
{
InetAddress r(*this);
switch(_sa.saddr.sa_family) {
case AF_INET:
r._sa.sin.sin_addr.s_addr = Utils::hton((uint32_t)(0xffffffff << (32 - netmaskBits())));
break;
case AF_INET6: {
unsigned char *bf = (unsigned char *)r._sa.sin6.sin6_addr.s6_addr;
signed int bitsLeft = (signed int)netmaskBits();
for(unsigned int i=0;i<16;++i) {
if (bitsLeft > 0) {
bf[i] = (unsigned char)((bitsLeft >= 8) ? 0xff : (0xff << (8 - bitsLeft)));
bitsLeft -= 8;
} else bf[i] = (unsigned char)0;
}
} break;
}
return r;
}
/**
* @return True if this is an IPv4 address
*/
inline bool isV4() const throw() { return (_sa.saddr.sa_family == AF_INET); }
/**
* @return True if this is an IPv6 address
*/
inline bool isV6() const throw() { return (_sa.saddr.sa_family == AF_INET6); }
/**
* @return Address type or TYPE_NULL if not defined
*/
inline AddressType type() const throw() { return (AddressType)_sa.saddr.sa_family; }
/**
* Force type to IPv4
*/
inline void setV4() throw() { _sa.saddr.sa_family = AF_INET; }
/**
* Force type to IPv6
*/
inline void setV6() throw() { _sa.saddr.sa_family = AF_INET6; }
/**
* @return Raw sockaddr structure
*/
inline struct sockaddr *saddr() throw() { return &(_sa.saddr); }
inline const struct sockaddr *saddr() const throw() { return &(_sa.saddr); }
/**
* @return Length of sockaddr_in if IPv4, sockaddr_in6 if IPv6
*/
inline unsigned int saddrLen() const
throw()
{
return (isV4() ? sizeof(struct sockaddr_in) : sizeof(struct sockaddr_in6));
}
/**
* @return Combined length of internal structure, room for either V4 or V6
*/
inline unsigned int saddrSpaceLen() const
throw()
{
return sizeof(_sa);
}
/**
* @return Raw sockaddr_in structure (valid if IPv4)
*/
inline const struct sockaddr_in *saddr4() const throw() { return &(_sa.sin); }
/**
* @return Raw sockaddr_in6 structure (valid if IPv6)
*/
inline const struct sockaddr_in6 *saddr6() const throw() { return &(_sa.sin6); }
/**
* @return Raw IP address (4 bytes for IPv4, 16 bytes for IPv6)
*/
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); }
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); }
/**
* Compare only the IP portions of addresses, ignoring port
*
* @param a Address to compare
* @return True if both addresses are of the same (valid) type and their IPs match
*/
inline bool ipsEqual(const InetAddress &a) const
throw()
{
if (_sa.saddr.sa_family == a._sa.saddr.sa_family) {
switch(_sa.saddr.sa_family) {
case AF_INET:
return (_sa.sin.sin_addr.s_addr == a._sa.sin.sin_addr.s_addr);
case AF_INET6:
return (!memcmp(_sa.sin6.sin6_addr.s6_addr,a._sa.sin6.sin6_addr.s6_addr,16));
}
}
return false;
}
bool operator==(const InetAddress &a) const throw();
inline bool operator!=(const InetAddress &a) const throw() { return !(*this == a); }
bool operator<(const InetAddress &a) const throw();
inline bool operator>(const InetAddress &a) const throw() { return (a < *this); }
inline bool operator<=(const InetAddress &a) const throw() { return !(a < *this); }
inline bool operator>=(const InetAddress &a) const throw() { return !(*this < a); }
/**
* @return True if address family is non-zero
*/
inline operator bool() const throw() { return ((_sa.saddr.sa_family == AF_INET)||(_sa.saddr.sa_family == AF_INET6)); }
/**
* Set to null/zero
*/
inline void zero()
throw()
{
_sa.saddr.sa_family = 0;
}
/**
* @param mac MAC address seed
* @return IPv6 link-local address
*/
static inline InetAddress makeIpv6LinkLocal(const MAC &mac)
throw()
{
InetAddress ip;
ip._sa.saddr.sa_family = AF_INET6;
ip._sa.sin6.sin6_addr.s6_addr[0] = 0xfe;
ip._sa.sin6.sin6_addr.s6_addr[1] = 0x80;
ip._sa.sin6.sin6_addr.s6_addr[2] = 0x00;
ip._sa.sin6.sin6_addr.s6_addr[3] = 0x00;
ip._sa.sin6.sin6_addr.s6_addr[4] = 0x00;
ip._sa.sin6.sin6_addr.s6_addr[5] = 0x00;
ip._sa.sin6.sin6_addr.s6_addr[6] = 0x00;
ip._sa.sin6.sin6_addr.s6_addr[7] = 0x00;
ip._sa.sin6.sin6_addr.s6_addr[8] = mac.data[0] & 0xfd;
ip._sa.sin6.sin6_addr.s6_addr[9] = mac.data[1];
ip._sa.sin6.sin6_addr.s6_addr[10] = mac.data[2];
ip._sa.sin6.sin6_addr.s6_addr[11] = 0xff;
ip._sa.sin6.sin6_addr.s6_addr[12] = 0xfe;
ip._sa.sin6.sin6_addr.s6_addr[13] = mac.data[3];
ip._sa.sin6.sin6_addr.s6_addr[14] = mac.data[4];
ip._sa.sin6.sin6_addr.s6_addr[15] = mac.data[5];
ip._sa.sin6.sin6_port = Utils::hton((uint16_t)64);
return ip;
}
private:
union {
struct sockaddr saddr;
struct sockaddr_in sin;
struct sockaddr_in6 sin6;
} _sa;
};
} // namespace ZeroTier
#endif