/
Address.hpp
160 lines (137 loc) · 4.58 KB
/
Address.hpp
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/*
* Copyright (c)2019 ZeroTier, Inc.
*
* Use of this software is governed by the Business Source License included
* in the LICENSE.TXT file in the project's root directory.
*
* Change Date: 2026-01-01
*
* On the date above, in accordance with the Business Source License, use
* of this software will be governed by version 2.0 of the Apache License.
*/
/****/
#ifndef ZT_ADDRESS_HPP
#define ZT_ADDRESS_HPP
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <string>
#include "Constants.hpp"
#include "Utils.hpp"
#include "Buffer.hpp"
namespace ZeroTier {
/**
* A ZeroTier address
*/
class Address
{
public:
Address() : _a(0) {}
Address(const Address &a) : _a(a._a) {}
Address(uint64_t a) : _a(a & 0xffffffffffULL) {}
/**
* @param bits Raw address -- 5 bytes, big-endian byte order
* @param len Length of array
*/
Address(const void *bits,unsigned int len) { setTo(bits,len); }
inline Address &operator=(const Address &a) { _a = a._a; return *this; }
inline Address &operator=(const uint64_t a) { _a = (a & 0xffffffffffULL); return *this; }
/**
* @param bits Raw address -- 5 bytes, big-endian byte order
* @param len Length of array
*/
inline void setTo(const void *bits,const unsigned int len)
{
if (len < ZT_ADDRESS_LENGTH) {
_a = 0;
return;
}
const unsigned char *b = (const unsigned char *)bits;
uint64_t a = ((uint64_t)*b++) << 32;
a |= ((uint64_t)*b++) << 24;
a |= ((uint64_t)*b++) << 16;
a |= ((uint64_t)*b++) << 8;
a |= ((uint64_t)*b);
_a = a;
}
/**
* @param bits Buffer to hold 5-byte address in big-endian byte order
* @param len Length of array
*/
inline void copyTo(void *const bits,const unsigned int len) const
{
if (len < ZT_ADDRESS_LENGTH) {
return;
}
unsigned char *b = (unsigned char *)bits;
*(b++) = (unsigned char)((_a >> 32) & 0xff);
*(b++) = (unsigned char)((_a >> 24) & 0xff);
*(b++) = (unsigned char)((_a >> 16) & 0xff);
*(b++) = (unsigned char)((_a >> 8) & 0xff);
*b = (unsigned char)(_a & 0xff);
}
/**
* Append to a buffer in big-endian byte order
*
* @param b Buffer to append to
*/
template<unsigned int C>
inline void appendTo(Buffer<C> &b) const
{
unsigned char *p = (unsigned char *)b.appendField(ZT_ADDRESS_LENGTH);
*(p++) = (unsigned char)((_a >> 32) & 0xff);
*(p++) = (unsigned char)((_a >> 24) & 0xff);
*(p++) = (unsigned char)((_a >> 16) & 0xff);
*(p++) = (unsigned char)((_a >> 8) & 0xff);
*p = (unsigned char)(_a & 0xff);
}
/**
* @return Integer containing address (0 to 2^40)
*/
inline uint64_t toInt() const { return _a; }
/**
* @return Hash code for use with Hashtable
*/
inline unsigned long hashCode() const { return (unsigned long)_a; }
/**
* @return Hexadecimal string
*/
inline char *toString(char buf[11]) const { return Utils::hex10(_a,buf); }
/**
* @return True if this address is not zero
*/
inline operator bool() const { return (_a != 0); }
/**
* Check if this address is reserved
*
* The all-zero null address and any address beginning with 0xff are
* reserved. (0xff is reserved for future use to designate possibly
* longer addresses, addresses based on IPv6 innards, etc.)
*
* @return True if address is reserved and may not be used
*/
inline bool isReserved() const { return ((!_a)||((_a >> 32) == ZT_ADDRESS_RESERVED_PREFIX)); }
/**
* @param i Value from 0 to 4 (inclusive)
* @return Byte at said position (address interpreted in big-endian order)
*/
inline uint8_t operator[](unsigned int i) const { return (uint8_t)(_a >> (32 - (i * 8))); }
inline void zero() { _a = 0; }
inline bool operator==(const uint64_t &a) const { return (_a == (a & 0xffffffffffULL)); }
inline bool operator!=(const uint64_t &a) const { return (_a != (a & 0xffffffffffULL)); }
inline bool operator>(const uint64_t &a) const { return (_a > (a & 0xffffffffffULL)); }
inline bool operator<(const uint64_t &a) const { return (_a < (a & 0xffffffffffULL)); }
inline bool operator>=(const uint64_t &a) const { return (_a >= (a & 0xffffffffffULL)); }
inline bool operator<=(const uint64_t &a) const { return (_a <= (a & 0xffffffffffULL)); }
inline bool operator==(const Address &a) const { return (_a == a._a); }
inline bool operator!=(const Address &a) const { return (_a != a._a); }
inline bool operator>(const Address &a) const { return (_a > a._a); }
inline bool operator<(const Address &a) const { return (_a < a._a); }
inline bool operator>=(const Address &a) const { return (_a >= a._a); }
inline bool operator<=(const Address &a) const { return (_a <= a._a); }
private:
uint64_t _a;
};
} // namespace ZeroTier
#endif