mirror of
https://github.com/NAStools/zerotierone.git
synced 2024-11-09 07:00:44 -08:00
146 lines
3.9 KiB
C++
146 lines
3.9 KiB
C++
/*
|
|
* ZeroTier One - Network Virtualization Everywhere
|
|
* Copyright (C) 2011-2016 ZeroTier, Inc. https://www.zerotier.com/
|
|
*
|
|
* 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/>.
|
|
*/
|
|
|
|
#ifndef ZT_OUTBOUNDMULTICAST_HPP
|
|
#define ZT_OUTBOUNDMULTICAST_HPP
|
|
|
|
#include <stdint.h>
|
|
|
|
#include <vector>
|
|
#include <algorithm>
|
|
|
|
#include "Constants.hpp"
|
|
#include "MAC.hpp"
|
|
#include "MulticastGroup.hpp"
|
|
#include "Address.hpp"
|
|
#include "Packet.hpp"
|
|
|
|
namespace ZeroTier {
|
|
|
|
class CertificateOfMembership;
|
|
class RuntimeEnvironment;
|
|
|
|
/**
|
|
* An outbound multicast packet
|
|
*
|
|
* This object isn't guarded by a mutex; caller must synchronize access.
|
|
*/
|
|
class OutboundMulticast
|
|
{
|
|
public:
|
|
/**
|
|
* Create an uninitialized outbound multicast
|
|
*
|
|
* It must be initialized with init().
|
|
*/
|
|
OutboundMulticast() {}
|
|
|
|
/**
|
|
* Initialize outbound multicast
|
|
*
|
|
* @param RR Runtime environment
|
|
* @param timestamp Creation time
|
|
* @param nwid Network ID
|
|
* @param com Certificate of membership or NULL if none available
|
|
* @param limit Multicast limit for desired number of packets to send
|
|
* @param gatherLimit Number to lazily/implicitly gather with this frame or 0 for none
|
|
* @param src Source MAC address of frame or NULL to imply compute from sender ZT address
|
|
* @param dest Destination multicast group (MAC + ADI)
|
|
* @param etherType 16-bit Ethernet type ID
|
|
* @param payload Data
|
|
* @param len Length of data
|
|
* @throws std::out_of_range Data too large to fit in a MULTICAST_FRAME
|
|
*/
|
|
void init(
|
|
const RuntimeEnvironment *RR,
|
|
uint64_t timestamp,
|
|
uint64_t nwid,
|
|
const CertificateOfMembership *com,
|
|
unsigned int limit,
|
|
unsigned int gatherLimit,
|
|
const MAC &src,
|
|
const MulticastGroup &dest,
|
|
unsigned int etherType,
|
|
const void *payload,
|
|
unsigned int len);
|
|
|
|
/**
|
|
* @return Multicast creation time
|
|
*/
|
|
inline uint64_t timestamp() const throw() { return _timestamp; }
|
|
|
|
/**
|
|
* @param now Current time
|
|
* @return True if this multicast is expired (has exceeded transmit timeout)
|
|
*/
|
|
inline bool expired(uint64_t now) const throw() { return ((now - _timestamp) >= ZT_MULTICAST_TRANSMIT_TIMEOUT); }
|
|
|
|
/**
|
|
* @return True if this outbound multicast has been sent to enough peers
|
|
*/
|
|
inline bool atLimit() const throw() { return (_alreadySentTo.size() >= _limit); }
|
|
|
|
/**
|
|
* Just send without checking log
|
|
*
|
|
* @param RR Runtime environment
|
|
* @param toAddr Destination address
|
|
*/
|
|
void sendOnly(const RuntimeEnvironment *RR,const Address &toAddr);
|
|
|
|
/**
|
|
* Just send and log but do not check sent log
|
|
*
|
|
* @param RR Runtime environment
|
|
* @param toAddr Destination address
|
|
*/
|
|
inline void sendAndLog(const RuntimeEnvironment *RR,const Address &toAddr)
|
|
{
|
|
_alreadySentTo.push_back(toAddr);
|
|
sendOnly(RR,toAddr);
|
|
}
|
|
|
|
/**
|
|
* Try to send this to a given peer if it hasn't been sent to them already
|
|
*
|
|
* @param RR Runtime environment
|
|
* @param toAddr Destination address
|
|
* @return True if address is new and packet was sent to switch, false if duplicate
|
|
*/
|
|
inline bool sendIfNew(const RuntimeEnvironment *RR,const Address &toAddr)
|
|
{
|
|
if (std::find(_alreadySentTo.begin(),_alreadySentTo.end(),toAddr) == _alreadySentTo.end()) {
|
|
sendAndLog(RR,toAddr);
|
|
return true;
|
|
} else return false;
|
|
}
|
|
|
|
private:
|
|
uint64_t _timestamp;
|
|
uint64_t _nwid;
|
|
unsigned int _limit;
|
|
Packet _packetNoCom;
|
|
Packet _packetWithCom;
|
|
std::vector<Address> _alreadySentTo;
|
|
bool _haveCom;
|
|
};
|
|
|
|
} // namespace ZeroTier
|
|
|
|
#endif
|