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Fixes to legacy peer support.

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This commit is contained in:
Adam Ierymenko 2014-10-11 15:49:31 -07:00
parent a9c6913f12
commit c2aac69a9f
3 changed files with 45 additions and 46 deletions
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66
node/IncomingPacket.cpp
View File

@ -604,52 +604,54 @@ bool IncomingPacket::_doP5_MULTICAST_FRAME(const RuntimeEnvironment *RR,const Sh
peer->receive(RR,_fromSock,_remoteAddress,hops(),packetId(),Packet::VERB_P5_MULTICAST_FRAME,0,Packet::VERB_NOP,Utils::now());
if (RR->topology->amSupernode()) {
std::vector<Address> legacyPeers(RR->mc->getLegacySubscribers(nwid,dest));
// To support legacy peers, old fashioned "P5" multicasts are propagated manually by supernodes.
// If the sending peer is >=1.0.0, they only go to legacy peers. Otherwise they go to all
// peers.
const unsigned int limit = 128; // use a fairly generous limit since we want legacy peers to always work until they go away
const bool senderIsLegacy = (peer->remoteVersionMajor() < 1);
std::vector<Address> members(RR->mc->getMembers(nwid,dest,limit));
setAt(ZT_PROTO_VERB_P5_MULTICAST_FRAME_IDX_PROPAGATION_DEPTH,(uint16_t)0xffff);
setSource(RR->identity.address());
compress();
unsigned int count = 0;
for(std::vector<Address>::iterator lp(legacyPeers.begin());lp!=legacyPeers.end();++lp) {
if ((*lp != origin)&&(*lp != source())) {
for(std::vector<Address>::iterator lp(members.begin());lp!=members.end();++lp) {
SharedPtr<Peer> lpp(RR->topology->getPeer(*lp));
if ( (*lp != origin) && (*lp != peer->address()) && ((senderIsLegacy) || (!lpp) || (lpp->remoteVersionMajor() < 1)) ) {
newInitializationVector();
setDestination(*lp);
RR->sw->send(*this,true);
if (++count >= 128) // harded-coded sanity limit for these legacy nodes
break;
}
}
}
return true;
} else {
SharedPtr<Network> network(RR->nc->network(nwid)); // will be NULL if not a member
if (network) {
if ((flags & ZT_PROTO_VERB_P5_MULTICAST_FRAME_FLAGS_HAS_MEMBERSHIP_CERTIFICATE)) {
CertificateOfMembership com;
com.deserialize(*this,ZT_PROTO_VERB_MULTICAST_FRAME_IDX_FRAME + frameLen + 2 + signatureLen);
if (com.hasRequiredFields())
network->addMembershipCertificate(com,false);
}
SharedPtr<Network> network(RR->nc->network(nwid));
if (network) {
if ((flags & ZT_PROTO_VERB_P5_MULTICAST_FRAME_FLAGS_HAS_MEMBERSHIP_CERTIFICATE)) {
CertificateOfMembership com;
com.deserialize(*this,ZT_PROTO_VERB_MULTICAST_FRAME_IDX_FRAME + frameLen + 2 + signatureLen);
if (com.hasRequiredFields())
network->addMembershipCertificate(com,false);
}
if (!network->isAllowed(origin)) {
_sendErrorNeedCertificate(RR,peer,network->id());
if (!network->isAllowed(origin)) {
_sendErrorNeedCertificate(RR,peer,network->id());
return true;
}
if ((frameLen > 0)&&(frameLen <= 2800)) {
if (!dest.mac().isMulticast())
return true;
if ((!sourceMac)||(sourceMac.isMulticast())||(sourceMac == network->mac()))
return true;
if (sourceMac != MAC(origin,network->id())) {
if (network->permitsBridging(origin)) {
network->learnBridgeRoute(sourceMac,origin);
} else return true;
}
if (frameLen) {
if (!dest.mac().isMulticast())
return true;
if ((!sourceMac)||(sourceMac.isMulticast())||(sourceMac == network->mac()))
return true;
if (sourceMac != MAC(origin,network->id())) {
if (network->permitsBridging(origin)) {
network->learnBridgeRoute(sourceMac,origin);
} else return true;
}
network->tapPut(sourceMac,dest.mac(),etherType,frame,frameLen);
}
network->tapPut(sourceMac,dest.mac(),etherType,frame,frameLen);
}
}
} catch (std::exception &ex) {

17
node/Multicaster.cpp
View File

@ -118,21 +118,18 @@ restart_member_scan:
return added;
}
std::vector<Address> Multicaster::getLegacySubscribers(uint64_t nwid,const MulticastGroup &mg) const
std::vector<Address> Multicaster::getMembers(uint64_t nwid,const MulticastGroup &mg,unsigned int limit) const
{
std::vector<Address> ls;
Mutex::Lock _l(_groups_m);
std::map< std::pair<uint64_t,MulticastGroup>,MulticastGroupStatus >::const_iterator gs(_groups.find(std::pair<uint64_t,MulticastGroup>(nwid,mg)));
if (gs == _groups.end())
return ls;
for(std::vector<MulticastGroupMember>::const_iterator m(gs->second.members.begin());m!=gs->second.members.end();++m) {
SharedPtr<Peer> p(RR->topology->getPeer(m->address));
if ((p)&&(p->remoteVersionKnown())&&(p->remoteVersionMajor() < 1))
ls.push_back(m->address);
for(std::vector<MulticastGroupMember>::const_reverse_iterator m(gs->second.members.rbegin());m!=gs->second.members.rend();++m) {
ls.push_back(m->address);
if (ls.size() >= limit)
break;
}
return ls;
}
@ -281,7 +278,9 @@ void Multicaster::send(
outp.append((unsigned char)0);
RR->identity.address().appendTo(outp);
outp.append((const void *)&rn,3); // random multicast ID
src.appendTo(outp);
if (src)
src.appendTo(outp);
else MAC(RR->identity.address(),nwid).appendTo(outp);
mg.mac().appendTo(outp);
outp.append((uint32_t)mg.adi());
outp.append((uint16_t)etherType);

8
node/Multicaster.hpp
View File

@ -120,14 +120,12 @@ public:
unsigned int gather(const Address &queryingPeer,uint64_t nwid,const MulticastGroup &mg,Packet &appendTo,unsigned int limit) const;
/**
* Get known peers with versions <1.0.0 and that are not supernodes
*
* This is legacy peer compatibility code and will be removed later.
* Get subscribers to a multicast group
*
* @param nwid Network ID
* @param mg Multicast group
*/
std::vector<Address> getLegacySubscribers(uint64_t nwid,const MulticastGroup &mg) const;
std::vector<Address> getMembers(uint64_t nwid,const MulticastGroup &mg,unsigned int limit) const;
/**
* Send a multicast
@ -138,7 +136,7 @@ public:
* @param nwid Network ID
* @param alwaysSendTo Send to these peers first and even if not included in subscriber list
* @param mg Multicast group
* @param src Source Ethernet MAC address
* @param src Source Ethernet MAC address or NULL to skip in packet and compute from ZT address (non-bridged mode)
* @param etherType Ethernet frame type
* @param data Packet data
* @param len Length of packet data