mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2024-12-19 13:07:55 +00:00
162 lines
3.3 KiB
C++
162 lines
3.3 KiB
C++
/*
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* ZeroTier One - Global Peer to Peer Ethernet
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* Copyright (C) 2012-2013 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_MAC_HPP
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#define _ZT_MAC_HPP
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#include <stdio.h>
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#include <stdlib.h>
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#include "Constants.hpp"
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#include "Array.hpp"
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#include "Utils.hpp"
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namespace ZeroTier {
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/**
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* An Ethernet MAC address
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*/
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class MAC : public Array<unsigned char,6>
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{
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public:
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/**
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* Create a zero/null MAC
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*/
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MAC()
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throw()
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{
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for(unsigned int i=0;i<6;++i)
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data[i] = 0;
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}
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/**
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* Create a MAC consisting of only this octet
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*
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* @param octet Octet to fill MAC with (e.g. 0xff for broadcast-all)
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*/
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MAC(const unsigned char octet)
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throw()
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{
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for(unsigned int i=0;i<6;++i)
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data[i] = octet;
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}
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/**
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* Create a MAC from raw bits
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*
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* @param bits 6 bytes of MAC address data
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*/
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MAC(const void *bits)
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throw()
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{
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for(unsigned int i=0;i<6;++i)
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data[i] = ((const unsigned char *)bits)[i];
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}
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/**
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* @return True if non-NULL (not all zero)
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*/
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inline operator bool() const
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throw()
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{
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for(unsigned int i=0;i<6;++i) {
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if (data[i])
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return true;
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}
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return false;
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}
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/**
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* @return True if this is the broadcast-all MAC (0xff:0xff:...)
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*/
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inline bool isBroadcast() const
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throw()
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{
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for(unsigned int i=0;i<6;++i) {
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if (data[i] != 0xff)
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return false;
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}
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return true;
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}
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/**
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* @return True if this is a multicast/broadcast address
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*/
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inline bool isMulticast() const
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throw()
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{
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return ((data[0] & 1));
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}
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/**
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* @return True if this is a ZeroTier unicast MAC
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*/
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inline bool isZeroTier() const
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throw()
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{
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return (data[0] == ZT_MAC_FIRST_OCTET);
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}
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/**
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* Zero this MAC
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*/
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inline void zero()
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throw()
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{
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for(unsigned int i=0;i<6;++i)
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data[i] = 0;
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}
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/**
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* @param s String hex representation (with or without :'s)
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* @return True if string decoded into a full-length MAC
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*/
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inline bool fromString(const char *s)
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{
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std::string b(Utils::unhex(s));
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if (b.length() == 6) {
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for(unsigned int i=0;i<6;++i)
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data[i] = (unsigned char)b[i];
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return true;
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}
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for(unsigned int i=0;i<6;++i)
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data[i] = 0;
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return false;
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}
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inline std::string toString() const
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{
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char tmp[32];
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Utils::snprintf(tmp,sizeof(tmp),"%.2x:%.2x:%.2x:%.2x:%.2x:%.2x",(int)data[0],(int)data[1],(int)data[2],(int)data[3],(int)data[4],(int)data[5]);
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return std::string(tmp);
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}
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};
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} // namespace ZeroTier
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#endif
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