Run geoip cluster service sub-process.

objects.mk

@@ -26,5 +26,6 @@ OBJS=\
 	osdep/BackgroundResolver.o \
 	osdep/Http.o \
 	osdep/OSUtils.o \
+	service/ClusterGeoIpService.o \
 	service/ControlPlane.o \
 	service/OneService.o

service/ClusterGeoIpService.cpp

@@ -0,0 +1,187 @@
+/*
+ * ZeroTier One - Network Virtualization Everywhere
+ * Copyright (C) 2011-2015  ZeroTier, Inc.
+ *
+ * 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/>.
+ *
+ * --
+ *
+ * ZeroTier may be used and distributed under the terms of the GPLv3, which
+ * are available at: http://www.gnu.org/licenses/gpl-3.0.html
+ *
+ * If you would like to embed ZeroTier into a commercial application or
+ * redistribute it in a modified binary form, please contact ZeroTier Networks
+ * LLC. Start here: http://www.zerotier.com/
+ */
+
+#ifdef ZT_ENABLE_CLUSTER
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <signal.h>
+#include <errno.h>
+
+#include "ClusterGeoIpService.hpp"
+#include "../node/Utils.hpp"
+#include "../osdep/OSUtils.hpp"
+
+#define ZT_CLUSTERGEOIPSERVICE_INTERNAL_CACHE_TTL (60 * 60 * 1000)
+
+namespace ZeroTier {
+
+ClusterGeoIpService::ClusterGeoIpService(const char *pathToExe) :
+	_pathToExe(pathToExe),
+	_sOutputFd(-1),
+	_sInputFd(-1),
+	_sPid(0),
+	_run(true)
+{
+	_thread = Thread::start(this);
+}
+
+ClusterGeoIpService::~ClusterGeoIpService()
+{
+	_run = false;
+	long p = _sPid;
+	if (p > 0) {
+		::kill(p,SIGTERM);
+		Thread::sleep(500);
+		::kill(p,SIGKILL);
+	}
+	Thread::join(_thread);
+}
+
+bool ClusterGeoIpService::locate(const InetAddress &ip,int &x,int &y,int &z)
+{
+	const uint64_t now = OSUtils::now();
+	bool r = false;
+	{
+		Mutex::Lock _l(_cache_m);
+		std::map< InetAddress,_CE >::iterator c(_cache.find(ip));
+		if (c != _cache.end()) {
+			x = c->second.x;
+			y = c->second.y;
+			z = c->second.z;
+			if ((now - c->second.ts) < ZT_CLUSTERGEOIPSERVICE_INTERNAL_CACHE_TTL)
+				return true;
+			else r = true; // return true but refresh as well
+		}
+	}
+
+	{
+		Mutex::Lock _l(_sOutputLock);
+		if (_sOutputFd >= 0) {
+			std::string ips(ip.toIpString());
+			ips.push_back('\n');
+			::write(_sOutputFd,ips.data(),ips.length());
+		}
+	}
+
+	return r;
+}
+
+void ClusterGeoIpService::threadMain()
+	throw()
+{
+	char linebuf[65536];
+	char buf[65536];
+	long n,lineptr;
+
+	while (_run) {
+		{
+			Mutex::Lock _l(_sOutputLock);
+
+			_sOutputFd = -1;
+			_sInputFd = -1;
+			_sPid = 0;
+
+			int stdinfds[2] = { 0,0 };  // sub-process's stdin, our output
+			int stdoutfds[2] = { 0,0 }; // sub-process's stdout, our input
+			::pipe(stdinfds);
+			::pipe(stdoutfds);
+
+			long p = (long)::vfork();
+			if (p < 0) {
+				Thread::sleep(500);
+				continue;
+			} else if (p == 0) {
+				::close(stdinfds[1]);
+				::close(stdoutfds[0]);
+				::dup2(stdinfds[0],STDIN_FILENO);
+				::dup2(stdoutfds[1],STDOUT_FILENO);
+				::execl(_pathToExe.c_str(),_pathToExe.c_str(),(const char *)0);
+				::exit(1);
+			} else {
+				::close(stdinfds[0]);
+				::close(stdoutfds[1]);
+				_sOutputFd = stdinfds[1];
+				_sInputFd = stdoutfds[0];
+				_sPid = p;
+			}
+		}
+
+		lineptr = 0;
+		while (_run) {
+			n = ::read(_sInputFd,buf,sizeof(buf));
+			if (n <= 0) {
+				if (errno == EINTR)
+					continue;
+				else break;
+			}
+			for(long i=0;i<n;++i) {
+				if (lineptr > sizeof(linebuf))
+					lineptr = 0;
+				if ((buf[i] == '\n')||(buf[i] == '\r')) {
+					linebuf[lineptr] = (char)0;
+					if (lineptr > 0) {
+						try {
+							std::vector<std::string> result(Utils::split(linebuf,",","",""));
+							if ((result.size() >= 7)&&(result[1] == "1")) {
+								InetAddress rip(result[0],0);
+								if ((rip.ss_family == AF_INET)||(rip.ss_family == AF_INET6)) {
+									_CE ce;
+									ce.ts = OSUtils::now();
+									ce.x = (int)::strtol(result[4].c_str(),(char **)0,10);
+									ce.y = (int)::strtol(result[5].c_str(),(char **)0,10);
+									ce.z = (int)::strtol(result[6].c_str(),(char **)0,10);
+									{
+										Mutex::Lock _l2(_cache_m);
+										_cache[rip] = ce;
+									}
+								}
+							}
+						} catch ( ... ) {}
+					}
+					lineptr = 0;
+				} else linebuf[lineptr++] = buf[i];
+			}
+		}
+
+		::close(_sOutputFd);
+		::close(_sInputFd);
+		::kill(_sPid,SIGTERM);
+		Thread::sleep(250);
+		::kill(_sPid,SIGKILL);
+		::waitpid(_sPid,(int *)0,0);
+	}
+}
+
+} // namespace ZeroTier
+
+#endif // ZT_ENABLE_CLUSTER

service/ClusterGeoIpService.hpp

@@ -0,0 +1,94 @@
+/*
+ * ZeroTier One - Network Virtualization Everywhere
+ * Copyright (C) 2011-2015  ZeroTier, Inc.
+ *
+ * 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/>.
+ *
+ * --
+ *
+ * ZeroTier may be used and distributed under the terms of the GPLv3, which
+ * are available at: http://www.gnu.org/licenses/gpl-3.0.html
+ *
+ * If you would like to embed ZeroTier into a commercial application or
+ * redistribute it in a modified binary form, please contact ZeroTier Networks
+ * LLC. Start here: http://www.zerotier.com/
+ */
+
+#ifndef ZT_CLUSTERGEOIPSERVICE_HPP
+#define ZT_CLUSTERGEOIPSERVICE_HPP
+
+#ifdef ZT_ENABLE_CLUSTER
+
+#include <vector>
+#include <map>
+#include <string>
+
+#include "../node/Constants.hpp"
+#include "../node/InetAddress.hpp"
+#include "../node/Mutex.hpp"
+#include "../osdep/Thread.hpp"
+
+namespace ZeroTier {
+
+/**
+ * Runs the Cluster GeoIP service in the background and resolves geoIP queries
+ */
+class ClusterGeoIpService
+{
+public:
+	/**
+	 * @param pathToExe Path to cluster geo-resolution service executable
+	 */
+	ClusterGeoIpService(const char *pathToExe);
+
+	~ClusterGeoIpService();
+
+	/**
+	 * Attempt to locate an IP
+	 *
+	 * This returns true if x, y, and z are set. Otherwise it returns false
+	 * and a geo-locate job is ordered in the background. This usually takes
+	 * 500-1500ms to complete, after which time results will be available.
+	 * If false is returned the supplied coordinate variables are unchanged.
+	 *
+	 * @param ip IPv4 or IPv6 address
+	 * @param x Reference to variable to receive X
+	 * @param y Reference to variable to receive Y
+	 * @param z Reference to variable to receive Z
+	 * @return True if coordinates were set
+	 */
+	bool locate(const InetAddress &ip,int &x,int &y,int &z);
+
+	void threadMain()
+		throw();
+
+private:
+	const std::string _pathToExe;
+	int _sOutputFd;
+	int _sInputFd;
+	volatile long _sPid;
+	volatile bool _run;
+	Thread _thread;
+	Mutex _sOutputLock;
+
+	struct _CE { uint64_t ts; int x,y,z; };
+	std::map< InetAddress,_CE > _cache;
+	Mutex _cache_m;
+};
+
+} // namespace ZeroTier
+
+#endif // ZT_ENABLE_CLUSTER
+
+#endif