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Imported Upstream version 1.1.14

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NAStools 2016-11-01 16:45:16 -07:00
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node/OutboundMulticast.cpp Normal file
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/*
* 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/>.
*/
#include "Constants.hpp"
#include "RuntimeEnvironment.hpp"
#include "OutboundMulticast.hpp"
#include "Switch.hpp"
#include "Network.hpp"
#include "CertificateOfMembership.hpp"
#include "Node.hpp"
namespace ZeroTier {
void OutboundMulticast::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)
{
_timestamp = timestamp;
_nwid = nwid;
_limit = limit;
uint8_t flags = 0;
if (gatherLimit) flags |= 0x02;
if (src) flags |= 0x04;
/*
TRACE(">>MC %.16llx INIT %.16llx/%s limit %u gatherLimit %u from %s to %s length %u com==%d",
(unsigned long long)this,
nwid,
dest.toString().c_str(),
limit,
gatherLimit,
(src) ? src.toString().c_str() : MAC(RR->identity.address(),nwid).toString().c_str(),
dest.toString().c_str(),
len,
(com) ? 1 : 0);
*/
_packetNoCom.setSource(RR->identity.address());
_packetNoCom.setVerb(Packet::VERB_MULTICAST_FRAME);
_packetNoCom.append((uint64_t)nwid);
_packetNoCom.append(flags);
if (gatherLimit) _packetNoCom.append((uint32_t)gatherLimit);
if (src) src.appendTo(_packetNoCom);
dest.mac().appendTo(_packetNoCom);
_packetNoCom.append((uint32_t)dest.adi());
_packetNoCom.append((uint16_t)etherType);
_packetNoCom.append(payload,len);
_packetNoCom.compress();
if (com) {
_haveCom = true;
flags |= 0x01;
_packetWithCom.setSource(RR->identity.address());
_packetWithCom.setVerb(Packet::VERB_MULTICAST_FRAME);
_packetWithCom.append((uint64_t)nwid);
_packetWithCom.append(flags);
com->serialize(_packetWithCom);
if (gatherLimit) _packetWithCom.append((uint32_t)gatherLimit);
if (src) src.appendTo(_packetWithCom);
dest.mac().appendTo(_packetWithCom);
_packetWithCom.append((uint32_t)dest.adi());
_packetWithCom.append((uint16_t)etherType);
_packetWithCom.append(payload,len);
_packetWithCom.compress();
} else _haveCom = false;
}
void OutboundMulticast::sendOnly(const RuntimeEnvironment *RR,const Address &toAddr)
{
if (_haveCom) {
SharedPtr<Peer> peer(RR->topology->getPeer(toAddr));
if ( (!peer) || (peer->needsOurNetworkMembershipCertificate(_nwid,RR->node->now(),true)) ) {
//TRACE(">>MC %.16llx -> %s (with COM)",(unsigned long long)this,toAddr.toString().c_str());
_packetWithCom.newInitializationVector();
_packetWithCom.setDestination(toAddr);
RR->sw->send(_packetWithCom,true,_nwid);
return;
}
}
//TRACE(">>MC %.16llx -> %s (without COM)",(unsigned long long)this,toAddr.toString().c_str());
_packetNoCom.newInitializationVector();
_packetNoCom.setDestination(toAddr);
RR->sw->send(_packetNoCom,true,_nwid);
}
} // namespace ZeroTier