Automatic periodic status dump from controller.

controller/EmbeddedNetworkController.cpp

@@ -429,6 +429,7 @@ static bool _parseRule(json &r,ZT_VirtualNetworkRule &rule)
 EmbeddedNetworkController::EmbeddedNetworkController(Node *node,const char *dbPath) :
 	_startTime(OSUtils::now()),
 	_running(true),
+	_lastDumpedStatus(0),
 	_db(dbPath),
 	_node(node)
 {
@@ -1010,20 +1011,6 @@ unsigned int EmbeddedNetworkController::handleControlPlaneHttpPOST(
 
 		} // else 404
 
-	} else if (path[0] == "ping") {
-
-		_startThreads();
-		_RQEntry *qe = new _RQEntry;
-		qe->type = _RQEntry::RQENTRY_TYPE_PING;
-		_queue.post(qe);
-
-		char tmp[64];
-		OSUtils::ztsnprintf(tmp,sizeof(tmp),"{\"clock\":%llu,\"ping\":%s}",(unsigned long long)now,OSUtils::jsonDump(b).c_str());
-		responseBody = tmp;
-		responseContentType = "application/json";
-
-		return 200;
-
 	}
 
 	return 404;
@@ -1088,8 +1075,9 @@ unsigned int EmbeddedNetworkController::handleControlPlaneHttpDELETE(
 void EmbeddedNetworkController::handleRemoteTrace(const ZT_RemoteTrace &rt)
 {
 	static volatile unsigned long idCounter = 0;
-
 	char id[128];
+	std::string k,v;
+
 	try {
 		std::vector<uint64_t> nw4m(_db.networksForMember(rt.origin));
 
@@ -1103,29 +1091,19 @@ void EmbeddedNetworkController::handleRemoteTrace(const ZT_RemoteTrace &rt)
 		for(char *l=Utils::stok(rt.data,"\n",&saveptr);(l);l=Utils::stok((char *)0,"\n",&saveptr)) {
 			char *eq = strchr(l,'=');
 			if (eq > l) {
-				std::string k(l,(unsigned long)(eq - l));
-				std::string v;
+				k.assign(l,(unsigned long)(eq - l));
+				v.clear();
 				++eq;
 				while (*eq) {
 					if (*eq == '\\') {
 						++eq;
 						if (*eq) {
 							switch(*eq) {
-								case 'r':
-									v.push_back('\r');
-									break;
-								case 'n':
-									v.push_back('\n');
-									break;
-								case '0':
-									v.push_back((char)0);
-									break;
-								case 'e':
-									v.push_back('=');
-									break;
-								default:
-									v.push_back(*eq);
-									break;
+								case 'r': v.push_back('\r'); break;
+								case 'n': v.push_back('\n'); break;
+								case '0': v.push_back((char)0); break;
+								case 'e': v.push_back('='); break;
+								default: v.push_back(*eq); break;
 							}
 							++eq;
 						}
@@ -1133,7 +1111,7 @@ void EmbeddedNetworkController::handleRemoteTrace(const ZT_RemoteTrace &rt)
 						v.push_back(*(eq++));
 					}
 				}
-				if (v.length() > 0)
+				if ((k.length() > 0)&&(v.length() > 0))
 					d[k] = v;
 			}
 		}
@@ -1177,20 +1155,23 @@ void EmbeddedNetworkController::handleRemoteTrace(const ZT_RemoteTrace &rt)
 void EmbeddedNetworkController::threadMain()
 	throw()
 {
+	char tmp[256];
 	_RQEntry *qe = (_RQEntry *)0;
-	while ((_running)&&(_queue.get(qe))) {
+	while ((_running)&&(_queue.get(qe,1000) != BlockingQueue<_RQEntry *>::STOP)) {
 		try {
-			if (qe->type == _RQEntry::RQENTRY_TYPE_REQUEST) {
+			if (qe->type == _RQEntry::RQENTRY_TYPE_REQUEST)
 				_request(qe->nwid,qe->fromAddr,qe->requestPacketId,qe->identity,qe->metaData);
-			} else if (qe->type == _RQEntry::RQENTRY_TYPE_PING) {
-				const uint64_t now = OSUtils::now();
+
+			// Every 10s we update a 'status' containing member online state, etc.
+			const uint64_t now = OSUtils::now();
+			if ((now - _lastDumpedStatus) >= 10000) {
+				_lastDumpedStatus = now;
 				bool first = true;
-				std::string pong("{\"memberStatus\":{");
+				std::string st("{\"id\":\"status\",\"objtype\":\"status\",\"memberStatus\":{");
 				{
 					Mutex::Lock _l(_memberStatus_m);
-					pong.reserve(48 * (_memberStatus.size() + 1));
-					_db.eachId([this,&pong,&now,&first](uint64_t networkId,uint64_t nodeId) {
-						char tmp[64];
+					st.reserve(48 * (_memberStatus.size() + 1));
+					_db.eachId([this,&st,&now,&first,&tmp](uint64_t networkId,uint64_t nodeId) {
 						uint64_t lrt = 0ULL;
 						auto ms = this->_memberStatus.find(_MemberStatusKey(networkId,nodeId));
 						if (ms != _memberStatus.end())
@@ -1200,14 +1181,13 @@ void EmbeddedNetworkController::threadMain()
 							(unsigned long long)networkId,
 							(unsigned long long)nodeId,
 							(unsigned long long)lrt);
-						pong.append(tmp);
+						st.append(tmp);
 						first = false;
 					});
 				}
-				char tmp2[256];
-				OSUtils::ztsnprintf(tmp2,sizeof(tmp2),"},\"clock\":%llu,\"startTime\":%llu}",(unsigned long long)now,(unsigned long long)_startTime);
-				pong.append(tmp2);
-				_db.writeRaw("pong",pong);
+				OSUtils::ztsnprintf(tmp,sizeof(tmp),"},\"clock\":%llu,\"startTime\":%llu}",(unsigned long long)now,(unsigned long long)_startTime);
+				st.append(tmp);
+				_db.writeRaw("status",st);
 			}
 		} catch ( ... ) {}
 		delete qe;

controller/EmbeddedNetworkController.hpp

@@ -105,8 +105,7 @@ private:
 		Identity identity;
 		Dictionary<ZT_NETWORKCONFIG_METADATA_DICT_CAPACITY> metaData;
 		enum {
-			RQENTRY_TYPE_REQUEST = 0,
-			RQENTRY_TYPE_PING = 1
+			RQENTRY_TYPE_REQUEST = 0
 		} type;
 	};
 
@@ -210,6 +209,7 @@ private:
 	volatile bool _running;
 	BlockingQueue<_RQEntry *> _queue;
 	std::vector<Thread> _threads;
+	volatile uint64_t _lastDumpedStatus;
 	Mutex _threads_m;
 
 	JSONDB _db;

osdep/BlockingQueue.hpp

@@ -30,6 +30,7 @@
 #include <queue>
 #include <mutex>
 #include <condition_variable>
+#include <chrono>
 
 namespace ZeroTier {
 
@@ -58,10 +59,6 @@ public:
 		c.notify_all();
 	}
 
-	/**
-	 * @param value Value to set to next queue item if return value is true
-	 * @return False if stop() has been called, true otherwise
-	 */
 	inline bool get(T &value)
 	{
 		std::unique_lock<std::mutex> lock(m);
@@ -75,6 +72,29 @@ public:
 		return true;
 	}
 
+	enum TimedWaitResult
+	{
+		OK,
+		TIMED_OUT,
+		STOP
+	};
+
+	inline TimedWaitResult get(T &value,const unsigned long ms)
+	{
+		const std::chrono::milliseconds ms2{ms};
+		std::unique_lock<std::mutex> lock(m);
+		if (!r) return STOP;
+		while (q.empty()) {
+			if (c.wait_for(lock,ms2) == std::cv_status::timeout)
+				return ((r) ? TIMED_OUT : STOP);
+			else if (!r)
+				return STOP;
+		}
+		value = q.front();
+		q.pop();
+		return OK;
+	}
+
 private:
 	volatile bool r;
 	std::queue<T> q;