More work on tags and capabilities.

node/Peer.hpp

@@ -40,8 +40,10 @@
 #include "SharedPtr.hpp"
 #include "AtomicCounter.hpp"
 #include "Hashtable.hpp"
+#include "Membership.hpp"
 #include "Mutex.hpp"
 #include "NonCopyable.hpp"
+#include "LockingPtr.hpp"
 
 namespace ZeroTier {
 
@@ -384,6 +386,34 @@ public:
 		return (_directPathPushCutoffCount < ZT_PUSH_DIRECT_PATHS_CUTOFF_LIMIT);
 	}
 
+	/**
+	 * Get the membership record for this network, possibly creating if missing
+	 *
+	 * @param networkId Network ID
+	 * @param createIfMissing If true, create a Membership record if there isn't one
+	 * @return Single-scope locking pointer (see LockingPtr.hpp) to Membership or NULL if not found and createIfMissing is false
+	 */
+	inline LockingPtr<Membership> membership(const uint64_t networkId,bool createIfMissing)
+	{
+		_memberships_m.lock();
+		try {
+			if (createIfMissing) {
+				return LockingPtr<Membership>(&(_memberships[networkId]),&_memberships_m);
+			} else {
+				Membership *m = _memberships.get(networkId);
+				if (m) {
+					return LockingPtr<Membership>(m,&_memberships_m);
+				} else {
+					_memberships_m.unlock();
+					return LockingPtr<Membership>();
+				}
+			}
+		} catch ( ... ) {
+			_memberships_m.unlock();
+			throw;
+		}
+	}
+
 	/**
 	 * Find a common set of addresses by which two peers can link, if any
 	 *
@@ -430,6 +460,9 @@ private:
 	unsigned int _latency;
 	unsigned int _directPathPushCutoffCount;
 
+	Hashtable<uint64_t,Membership> _memberships;
+	Mutex _memberships_m;
+
 	AtomicCounter __refCount;
 };