Improved reliability and performance, better startup and shutdown semantics, HTTP control plane is now disabled by default

include/VirtualTapManager.hpp

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+/*
+ * ZeroTier SDK - Network Virtualization Everywhere
+ * Copyright (C) 2011-2019  ZeroTier, Inc.  https://www.zerotier.com/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * --
+ *
+ * You can be released from the requirements of the license by purchasing
+ * a commercial license. Buying such a license is mandatory as soon as you
+ * develop commercial closed-source software that incorporates or links
+ * directly against ZeroTier software without disclosing the source code
+ * of your own application.
+ */
+
+/**
+ * @file
+ *
+ * Management of virtual tap interfaces
+ */
+
+#include "VirtualTap.hpp"
+#include "OneService.hpp"
+
+namespace ZeroTier {
+
+extern std::vector<void*> vtaps;
+extern Mutex _vtaps_lock;
+
+class VirtualTap;
+
+/**
+ * @brief Static utility class for safely handling VirtualTap(s)
+ */
+class VirtualTapManager
+{
+public:
+
+	static void add_tap(VirtualTap *tap) {
+		_vtaps_lock.lock();
+		vtaps.push_back((void*)tap);
+		_vtaps_lock.unlock();
+	}
+
+	static VirtualTap *getTapByNWID(uint64_t nwid)
+	{
+		_vtaps_lock.lock();
+		VirtualTap *s, *tap = nullptr;
+		for (size_t i=0; i<vtaps.size(); i++) {
+			s = (VirtualTap*)vtaps[i];
+			if (s->_nwid == nwid) { tap = s; }
+		}
+		_vtaps_lock.unlock();
+		return tap;
+	}
+
+	static size_t get_vtaps_size() {
+		size_t sz;
+		_vtaps_lock.lock();
+		sz = vtaps.size();
+		_vtaps_lock.unlock();
+		return sz;
+	}
+
+	// TODO: We shouldn't re-apply the reference to everything all the time
+	static void update_service_references(void *serviceRef) {
+		_vtaps_lock.lock();
+		for (size_t i=0;i<vtaps.size(); i++) {
+			VirtualTap *s = (VirtualTap*)vtaps[i];
+			s->zt1ServiceRef=serviceRef;
+		}
+		_vtaps_lock.unlock();
+	}
+
+	static void remove_by_nwid(uint64_t nwid) {
+		_vtaps_lock.lock();
+		for (size_t i=0;i<vtaps.size(); i++) {
+			VirtualTap *s = (VirtualTap*)vtaps[i];
+			if (s->_nwid == nwid) {
+				vtaps.erase(vtaps.begin() + i);
+			}
+		}
+		_vtaps_lock.unlock();
+	}
+
+	static void clear() {
+		_vtaps_lock.lock();
+		vtaps.clear();
+		_vtaps_lock.unlock();
+	}
+
+	static void get_network_details(uint64_t nwid, struct zts_network_details *nd)
+	{
+		VirtualTap *tap;
+		socklen_t addrlen;
+		_vtaps_lock.lock();
+		for (size_t i=0; i<vtaps.size(); i++) {
+			tap = (VirtualTap*)vtaps[i];
+			if (tap->_nwid == nwid) {
+				nd->nwid = tap->_nwid;
+				nd->mtu = tap->_mtu;
+				// assigned addresses
+				nd->num_addresses = tap->_ips.size() < ZTS_MAX_ASSIGNED_ADDRESSES ? tap->_ips.size() : ZTS_MAX_ASSIGNED_ADDRESSES;
+				for (int j=0; j<nd->num_addresses; j++) {
+					addrlen = tap->_ips[j].isV4() ? sizeof(struct sockaddr_in) : sizeof(struct sockaddr_in6);
+					memcpy(&(nd->addr[j]), &(tap->_ips[j]), addrlen);
+				}
+				// routes
+				nd->num_routes = ZTS_MAX_NETWORK_ROUTES;
+				OneService *zt1Service = (OneService*)tap->zt1ServiceRef;
+				zt1Service->getRoutes(nwid, (ZT_VirtualNetworkRoute*)&(nd->routes)[0], &(nd->num_routes));
+				break;
+			}
+		}
+		_vtaps_lock.unlock();
+	}
+
+	static void get_all_network_details(struct zts_network_details *nds, int *num)
+	{
+		VirtualTap *tap;
+		*num = get_vtaps_size();
+		for (size_t i=0; i<vtaps.size(); i++) {
+			tap = (VirtualTap*)vtaps[i];
+			get_network_details(tap->_nwid, &nds[i]);
+		}
+	}
+};
+
+} // namespace ZeroTier