mirror of
https://github.com/didyouexpectthat/zerotierone.git
synced 2024-09-19 04:10:20 -07:00
104 lines
3.0 KiB
C++
104 lines
3.0 KiB
C++
/*
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* ZeroTier One - Network Virtualization Everywhere
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* Copyright (C) 2011-2016 ZeroTier, Inc. https://www.zerotier.com/
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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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#include "Constants.hpp"
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#include "RuntimeEnvironment.hpp"
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#include "OutboundMulticast.hpp"
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#include "Switch.hpp"
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#include "Network.hpp"
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#include "Node.hpp"
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#include "Peer.hpp"
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#include "Topology.hpp"
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namespace ZeroTier {
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void OutboundMulticast::init(
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const RuntimeEnvironment *RR,
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uint64_t timestamp,
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uint64_t nwid,
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bool disableCompression,
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unsigned int limit,
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unsigned int gatherLimit,
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const MAC &src,
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const MulticastGroup &dest,
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unsigned int etherType,
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const void *payload,
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unsigned int len)
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{
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uint8_t flags = 0;
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_timestamp = timestamp;
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_nwid = nwid;
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if (src) {
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_macSrc = src;
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flags |= 0x04;
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} else {
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_macSrc.fromAddress(RR->identity.address(),nwid);
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}
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_macDest = dest.mac();
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_limit = limit;
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_frameLen = (len < ZT_MAX_MTU) ? len : ZT_MAX_MTU;
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_etherType = etherType;
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if (gatherLimit) flags |= 0x02;
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/*
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TRACE(">>MC %.16llx INIT %.16llx/%s limit %u gatherLimit %u from %s to %s length %u",
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(unsigned long long)this,
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nwid,
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dest.toString().c_str(),
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limit,
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gatherLimit,
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(src) ? src.toString().c_str() : MAC(RR->identity.address(),nwid).toString().c_str(),
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dest.toString().c_str(),
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len);
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*/
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_packet.setSource(RR->identity.address());
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_packet.setVerb(Packet::VERB_MULTICAST_FRAME);
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_packet.append((uint64_t)nwid);
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_packet.append(flags);
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if (gatherLimit) _packet.append((uint32_t)gatherLimit);
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if (src) src.appendTo(_packet);
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dest.mac().appendTo(_packet);
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_packet.append((uint32_t)dest.adi());
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_packet.append((uint16_t)etherType);
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_packet.append(payload,_frameLen);
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if (!disableCompression)
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_packet.compress();
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memcpy(_frameData,payload,_frameLen);
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}
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void OutboundMulticast::sendOnly(const RuntimeEnvironment *RR,void *tPtr,const Address &toAddr)
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{
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const SharedPtr<Network> nw(RR->node->network(_nwid));
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const Address toAddr2(toAddr);
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if ((nw)&&(nw->filterOutgoingPacket(tPtr,true,RR->identity.address(),toAddr2,_macSrc,_macDest,_frameData,_frameLen,_etherType,0))) {
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//TRACE(">>MC %.16llx -> %s",(unsigned long long)this,toAddr.toString().c_str());
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_packet.newInitializationVector();
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_packet.setDestination(toAddr2);
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RR->node->expectReplyTo(_packet.packetId());
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Packet tmp(_packet); // make a copy of packet so as not to garble the original -- GitHub issue #461
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RR->sw->send(tPtr,tmp,true);
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}
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}
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} // namespace ZeroTier
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