Wire through upstream stuff and add setRole().

include/ZeroTierOne.h

@@ -1784,6 +1784,17 @@ int ZT_Node_addLocalInterfaceAddress(ZT_Node *node,const struct sockaddr_storage
  */
 void ZT_Node_clearLocalInterfaceAddresses(ZT_Node *node);
 
+/**
+ * Set peer role
+ *
+ * Right now this can only be used to set a peer to either LEAF or
+ * UPSTREAM, since roots are fixed and defined by the World.
+ *
+ * @param ztAddress ZeroTier address (least significant 40 bits)
+ * @param role New peer role (LEAF or UPSTREAM)
+ */
+void ZT_Node_setRole(ZT_Node *node,uint64_t ztAddress,ZT_PeerRole role);
+
 /**
  * Set a network configuration master instance for this node
  *

node/Node.cpp

@@ -412,7 +412,7 @@ ZT_PeerList *Node::peers() const
 			p->versionRev = -1;
 		}
 		p->latency = pi->second->latency();
-		p->role = RR->topology->isRoot(pi->second->identity()) ? ZT_PEER_ROLE_ROOT : ZT_PEER_ROLE_LEAF;
+		p->role = RR->topology->isRoot(pi->second->identity()) ? ZT_PEER_ROLE_ROOT : (RR->topology->isUpstream(pi->second->identity()) ? ZT_PEER_ROLE_UPSTREAM : ZT_PEER_ROLE_LEAF);
 
 		std::vector< std::pair< SharedPtr<Path>,bool > > paths(pi->second->paths(_now));
 		SharedPtr<Path> bestp(pi->second->getBestPath(_now,false));
@@ -484,6 +484,11 @@ void Node::clearLocalInterfaceAddresses()
 	_directPaths.clear();
 }
 
+void Node::setRole(uint64_t ztAddress,ZT_PeerRole role)
+{
+	RR->topology->setUpstream(Address(ztAddress),(role == ZT_PEER_ROLE_UPSTREAM));
+}
+
 void Node::setNetconfMaster(void *networkControllerInstance)
 {
 	RR->localNetworkController = reinterpret_cast<NetworkController *>(networkControllerInstance);
@@ -1007,6 +1012,13 @@ void ZT_Node_clearLocalInterfaceAddresses(ZT_Node *node)
 	} catch ( ... ) {}
 }
 
+void ZT_Node_setRole(ZT_Node *node,uint64_t ztAddress,ZT_PeerRole role)
+{
+	try {
+		reinterpret_cast<ZeroTier::Node *>(node)->setRole(ztAddress,role);
+	} catch ( ... ) {}
+}
+
 void ZT_Node_setNetconfMaster(ZT_Node *node,void *networkControllerInstance)
 {
 	try {

node/Node.hpp

@@ -105,6 +105,7 @@ public:
 	void freeQueryResult(void *qr);
 	int addLocalInterfaceAddress(const struct sockaddr_storage *addr);
 	void clearLocalInterfaceAddresses();
+	void setRole(uint64_t ztAddress,ZT_PeerRole role);
 	void setNetconfMaster(void *networkControllerInstance);
 	ZT_ResultCode circuitTestBegin(ZT_CircuitTest *test,void (*reportCallback)(ZT_Node *,ZT_CircuitTest *,const ZT_CircuitTestReport *));
 	void circuitTestEnd(ZT_CircuitTest *test);