From eb79d4a2f34b34c49cd2d69efac22d9bc8ac27cb Mon Sep 17 00:00:00 2001
From: Adam Ierymenko <adam.ierymenko@gmail.com>
Date: Tue, 20 Oct 2015 16:24:21 -0700
Subject: Wire up peer announcement in cluster.

---
 node/Cluster.cpp | 72 +++++++++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 58 insertions(+), 14 deletions(-)

(limited to 'node/Cluster.cpp')

diff --git a/node/Cluster.cpp b/node/Cluster.cpp
index 5b76d1f0..f1dc45b9 100644
--- a/node/Cluster.cpp
+++ b/node/Cluster.cpp
@@ -263,8 +263,6 @@ void Cluster::handleIncomingStateMessage(const void *msg,unsigned int len)
 									remotePeerAddress.appendTo(rendezvousForDest);
 
 									Buffer<2048> rendezvousForOtherEnd;
-									rendezvousForOtherEnd.addSize(2); // leave room for payload size
-									rendezvousForOtherEnd.append((uint8_t)STATE_MESSAGE_PROXY_SEND);
 									remotePeerAddress.appendTo(rendezvousForOtherEnd);
 									rendezvousForOtherEnd.append((uint8_t)Packet::VERB_RENDEZVOUS);
 									const unsigned int rendezvousForOtherEndPayloadSizePtr = rendezvousForOtherEnd.size();
@@ -298,9 +296,8 @@ void Cluster::handleIncomingStateMessage(const void *msg,unsigned int len)
 									}
 
 									if (haveMatch) {
+										_send(fromMemberId,STATE_MESSAGE_PROXY_SEND,rendezvousForOtherEnd.data(),rendezvousForOtherEnd.size());
 										RR->sw->send(rendezvousForDest,true,0);
-										rendezvousForOtherEnd.setAt<uint16_t>(0,(uint16_t)(rendezvousForOtherEnd.size() - 2));
-										_send(fromMemberId,rendezvousForOtherEnd.data(),rendezvousForOtherEnd.size());
 									}
 								}
 							}
@@ -331,14 +328,64 @@ void Cluster::handleIncomingStateMessage(const void *msg,unsigned int len)
 
 void Cluster::replicateHavePeer(const Identity &peerId)
 {
+	{	// Use peer affinity table to track our own last announce time for peers
+		_PeerAffinity pa(peerId.address(),_id,RR->node->now());
+		Mutex::Lock _l2(_peerAffinities_m);
+		std::vector<_PeerAffinity>::iterator i(std::lower_bound(_peerAffinities.begin(),_peerAffinities.end(),pa)); // O(log(n))
+		if ((i != _peerAffinities.end())&&(i->key == pa.key)) {
+			if ((pa.timestamp - i->timestamp) >= ZT_CLUSTER_HAVE_PEER_ANNOUNCE_PERIOD) {
+				i->timestamp = pa.timestamp;
+				// continue to announcement
+			} else {
+				// we've already announced this peer recently, so skip
+				return;
+			}
+		} else {
+			_peerAffinities.push_back(pa);
+			std::sort(_peerAffinities.begin(),_peerAffinities.end()); // probably a more efficient way to insert but okay for now
+			// continue to announcement
+		}
+	}
+
+	// announcement
+	Buffer<4096> buf;
+	peerId.serialize(buf,false);
+	{
+		Mutex::Lock _l(_memberIds_m);
+		for(std::vector<uint16_t>::const_iterator mid(_memberIds.begin());mid!=_memberIds.end();++mid) {
+			Mutex::Lock _l2(_members[*mid].lock);
+			_send(*mid,STATE_MESSAGE_HAVE_PEER,buf.data(),buf.size());
+		}
+	}
 }
 
 void Cluster::replicateMulticastLike(uint64_t nwid,const Address &peerAddress,const MulticastGroup &group)
 {
+	Buffer<4096> buf;
+	buf.append((uint64_t)nwid);
+	peerAddress.appendTo(buf);
+	group.mac().appendTo(buf);
+	buf.append((uint32_t)group.adi());
+	{
+		Mutex::Lock _l(_memberIds_m);
+		for(std::vector<uint16_t>::const_iterator mid(_memberIds.begin());mid!=_memberIds.end();++mid) {
+			Mutex::Lock _l2(_members[*mid].lock);
+			_send(*mid,STATE_MESSAGE_MULTICAST_LIKE,buf.data(),buf.size());
+		}
+	}
 }
 
 void Cluster::replicateCertificateOfNetworkMembership(const CertificateOfMembership &com)
 {
+	Buffer<4096> buf;
+	com.serialize(buf);
+	{
+		Mutex::Lock _l(_memberIds_m);
+		for(std::vector<uint16_t>::const_iterator mid(_memberIds.begin());mid!=_memberIds.end();++mid) {
+			Mutex::Lock _l2(_members[*mid].lock);
+			_send(*mid,STATE_MESSAGE_COM,buf.data(),buf.size());
+		}
+	}
 }
 
 void Cluster::doPeriodicTasks()
@@ -371,7 +418,7 @@ void Cluster::doPeriodicTasks()
 				alive.append((uint8_t)_zeroTierPhysicalEndpoints.size());
 				for(std::vector<InetAddress>::const_iterator pe(_zeroTierPhysicalEndpoints.begin());pe!=_zeroTierPhysicalEndpoints.end();++pe)
 					pe->serialize(alive);
-				_send(*mid,alive.data(),alive.size());
+				_send(*mid,STATE_MESSAGE_ALIVE,alive.data(),alive.size());
 				_members[*mid].lastAnnouncedAliveTo = now;
 			}
 
@@ -498,18 +545,15 @@ bool Cluster::redirectPeer(const SharedPtr<Peer> &peer,const InetAddress &peerPh
 	}
 }
 
-void Cluster::_send(uint16_t memberId,const void *msg,unsigned int len)
+void Cluster::_send(uint16_t memberId,StateMessageType type,const void *msg,unsigned int len)
 {
 	_Member &m = _members[memberId];
 	// assumes m.lock is locked!
-	for(;;) {
-		if ((m.q.size() + len) > ZT_CLUSTER_MAX_MESSAGE_LENGTH)
-			_flush(memberId);
-		else {
-			m.q.append(msg,len);
-			break;
-		}
-	}
+	if ((m.q.size() + len + 3) > ZT_CLUSTER_MAX_MESSAGE_LENGTH)
+		_flush(memberId);
+	m.q.append((uint16_t)(len + 1));
+	m.q.append((uint8_t)type);
+	m.q.append(msg,len);
 }
 
 void Cluster::_flush(uint16_t memberId)
-- 
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