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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: 2025-01-01
*
* 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.
*/
/****/
#include "Constants.hpp"
#include "RuntimeEnvironment.hpp"
#include "OutboundMulticast.hpp"
#include "Switch.hpp"
#include "Network.hpp"
#include "Node.hpp"
#include "Peer.hpp"
#include "Topology.hpp"
namespace ZeroTier {
void OutboundMulticast::init(
const RuntimeEnvironment *RR,
uint64_t timestamp,
uint64_t nwid,
bool disableCompression,
unsigned int limit,
unsigned int gatherLimit,
const MAC &src,
const MulticastGroup &dest,
unsigned int etherType,
const void *payload,
unsigned int len)
{
uint8_t flags = 0;
_timestamp = timestamp;
_nwid = nwid;
if (src) {
_macSrc = src;
flags |= 0x04;
} else {
_macSrc.fromAddress(RR->identity.address(),nwid);
}
_macDest = dest.mac();
_limit = limit;
_frameLen = (len < ZT_MAX_MTU) ? len : ZT_MAX_MTU;
_etherType = etherType;
if (gatherLimit) {
flags |= 0x02;
}
_packet.setSource(RR->identity.address());
_packet.setVerb(Packet::VERB_MULTICAST_FRAME);
_packet.append((uint64_t)nwid);
_packet.append(flags);
if (gatherLimit) {
_packet.append((uint32_t)gatherLimit);
}
if (src) {
src.appendTo(_packet);
}
dest.mac().appendTo(_packet);
_packet.append((uint32_t)dest.adi());
_packet.append((uint16_t)etherType);
_packet.append(payload,_frameLen);
if (!disableCompression) {
_packet.compress();
}
memcpy(_frameData,payload,_frameLen);
}
void OutboundMulticast::sendOnly(const RuntimeEnvironment *RR,void *tPtr,const Address &toAddr)
{
const SharedPtr<Network> nw(RR->node->network(_nwid));
uint8_t QoSBucket = 255; // Dummy value
if ((nw)&&(nw->filterOutgoingPacket(tPtr,true,RR->identity.address(),toAddr,_macSrc,_macDest,_frameData,_frameLen,_etherType,0,QoSBucket))) {
nw->pushCredentialsIfNeeded(tPtr,toAddr,RR->node->now());
_packet.newInitializationVector();
_packet.setDestination(toAddr);
RR->node->expectReplyTo(_packet.packetId());
_tmp = _packet;
RR->sw->send(tPtr,_tmp,true);
}
}
} // namespace ZeroTier
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