From 3443b203e4035104071f5af0143591dcd48a4974 Mon Sep 17 00:00:00 2001
From: Adam Ierymenko <adam.ierymenko@gmail.com>
Date: Tue, 1 Oct 2013 16:01:36 -0400
Subject: Each peer now tracks the last time it announced multicast LIKEs
 independently and does so frequently enough to prevent expires. Also add a
 multicast debug facility for use on the testnet.

---
 node/Switch.cpp | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

(limited to 'node/Switch.cpp')

diff --git a/node/Switch.cpp b/node/Switch.cpp
index 14b658a7..896c6435 100644
--- a/node/Switch.cpp
+++ b/node/Switch.cpp
@@ -400,6 +400,7 @@ void Switch::announceMulticastGroups(const std::map< SharedPtr<Network>,std::set
 						outp.reset((*p)->address(),_r->identity.address(),Packet::VERB_MULTICAST_LIKE);
 					}
 
+					// network ID, MAC, ADI
 					outp.append((uint64_t)nwmgs->first->id());
 					outp.append(mg->mac().data,6);
 					outp.append((uint32_t)mg->adi());
@@ -412,6 +413,30 @@ void Switch::announceMulticastGroups(const std::map< SharedPtr<Network>,std::set
 	}
 }
 
+void Switch::announceMulticastGroups(const SharedPtr<Peer> &peer)
+{
+	Packet outp(peer->address(),_r->identity.address(),Packet::VERB_MULTICAST_LIKE);
+	std::vector< SharedPtr<Network> > networks(_r->nc->networks());
+	for(std::vector< SharedPtr<Network> >::iterator n(networks.begin());n!=networks.end();++n) {
+		if (((*n)->isAllowed(peer->address()))||(_r->topology->isSupernode(peer->address()))) {
+			std::set<MulticastGroup> mgs((*n)->multicastGroups());
+			for(std::set<MulticastGroup>::iterator mg(mgs.begin());mg!=mgs.end();++mg) {
+				if ((outp.size() + 18) > ZT_UDP_DEFAULT_PAYLOAD_MTU) {
+					send(outp,true);
+					outp.reset(peer->address(),_r->identity.address(),Packet::VERB_MULTICAST_LIKE);
+				}
+
+				// network ID, MAC, ADI
+				outp.append((uint64_t)(*n)->id());
+				outp.append(mg->mac().data,6);
+				outp.append((uint32_t)mg->adi());
+			}
+		}
+	}
+	if (outp.size() > ZT_PROTO_MIN_PACKET_LENGTH)
+		send(outp,true);
+}
+
 void Switch::requestWhois(const Address &addr)
 {
 	TRACE("requesting WHOIS for %s",addr.toString().c_str());
-- 
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