Fix UUID to string for platform consistency

components/control/cpp/src/master.cpp

@@ -75,6 +75,7 @@ vector<json_t> Master::getSlaves() {
 	vector<json_t> result;
 	for (auto &r : response) {
 		result.push_back(json_t::parse(r));
+		LOG(INFO) << "Node details: " << result[result.size()-1];
 	}
 	return result;
 }
@@ -84,7 +85,11 @@ vector<string> Master::getConfigurables() {
 }
 
 vector<string> Master::getConfigurables(const ftl::UUID &peer) {
-	return net_->call<vector<string>>(peer, "list_configurables");
+	try {
+		return net_->call<vector<string>>(peer, "list_configurables");
+	} catch (...) {
+		return {};
+	}
 }
 
 vector<json_t> Master::get(const string &uri) {

components/net/cpp/include/ftl/net/universe.hpp

@@ -361,7 +361,8 @@ template <typename R, typename... ARGS>
 R Universe::call(const ftl::UUID &pid, const std::string &name, ARGS... args) {
 	Peer *p = getPeer(pid);
 	if (p == nullptr || !p->isConnected()) {
-		DLOG(WARNING) << "Attempting to call an unknown peer : " << pid.to_string();
+		if (p == nullptr) DLOG(WARNING) << "Attempting to call an unknown peer : " << pid.to_string();
+		else DLOG(WARNING) << "Attempting to call an disconnected peer : " << pid.to_string();
 		throw -1;
 	}
 	return p->call<R>(name, args...);

components/net/cpp/include/ftl/uuid.hpp

@@ -60,6 +60,15 @@ namespace ftl {
 		 * Get a pretty string.
 		 */
 		std::string to_string() const {
+			static const char *digits = "0123456789abcdef";
+			std::string rc(sizeof(uuid_)*2,'0');
+
+			for (size_t i=0 ; i<16; ++i) {
+				rc[i*2] = digits[uuid_[i] & 0x0f];
+				rc[i*2+1] = digits[(uuid_[i] >> 4) & 0x0f];
+			}
+			return rc;
+/* 
 #ifdef WIN32
 			RPC_CSTR szUuid = NULL;
 			if (::UuidToStringA(&guid_, &szUuid) == RPC_S_OK) {
@@ -71,6 +80,7 @@ namespace ftl {
 			uuid_unparse(uuid_, b);
 			return std::string(b);
 #endif
+*/
 		}
 		
 		/* Allow the UUID to be packed into an RPC message. */