initial checkin of new resolver

1 files changed, 105 insertions, 0 deletions

diff --git a/src/resolver.cpp b/src/resolver.cpp
new file mode 100644
index 0000000..52d0c0b
--- /dev/null
+++ b/src/resolver.cpp
@@ -0,0 +1,105 @@
+/*
+ *  anytun
+ *
+ *  The secure anycast tunneling protocol (satp) defines a protocol used
+ *  for communication between any combination of unicast and anycast
+ *  tunnel endpoints.  It has less protocol overhead than IPSec in Tunnel
+ *  mode and allows tunneling of every ETHER TYPE protocol (e.g.
+ *  ethernet, ip, arp ...). satp directly includes cryptography and
+ *  message authentication based on the methodes used by SRTP.  It is
+ *  intended to deliver a generic, scaleable and secure solution for
+ *  tunneling and relaying of packets of any protocol.
+ *
+ *
+ *  Copyright (C) 2007-2008 Othmar Gsenger, Erwin Nindl, 
+ *                          Christian Pointner <satp@wirdorange.org>
+ *
+ *  This file is part of Anytun.
+ *
+ *  Anytun is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 3 as
+ *  published by the Free Software Foundation.
+ *
+ *  Anytun 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 anytun.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <boost/bind.hpp>
+
+#include "resolver.h"
+#include "log.h"
+
+template<class Proto> ResolveHandler<Proto>::ResolveHandler(const std::string& addr, const std::string& port) : addr_(addr), port_(port)
+{
+}
+
+template<class Proto> void ResolveHandler<Proto>::operator()(const boost::system::error_code& e, const boost::asio::ip::basic_resolver_iterator<Proto>)
+{
+  cLog.msg(Log::PRIO_DEBUG) << "ResolveHandler<" << typeid(Proto).name() << ">() called, addr='" << addr_ << "', port='" << port_ << "'";
+}
+
+Resolver* Resolver::inst = NULL;
+Mutex Resolver::instMutex;
+Resolver& gResolver = Resolver::instance();
+
+Resolver& Resolver::instance()
+{
+  Lock lock(instMutex);
+  static instanceCleaner c;
+  if(!inst)
+    inst = new Resolver();
+  
+  return *inst;
+}
+
+Resolver::Resolver() : udp_resolver_(io_service_), tcp_resolver_(io_service_), thread_(NULL)
+{
+}
+
+Resolver::~Resolver()
+{
+  if(thread_)
+    delete thread_;
+}
+
+void Resolver::init()
+{
+  if(!thread_)
+    thread_ = new boost::thread(boost::bind(run, this));
+}
+
+void Resolver::run(void* s)
+{
+  Resolver* self = reinterpret_cast<Resolver*>(s);
+
+  cLog.msg(Log::PRIO_DEBUG) << "Resolver Thread started";
+
+  while(1) {
+    self->io_service_.run();
+    self->io_service_.reset();
+    boost::this_thread::sleep(boost::posix_time::milliseconds(250));
+  }
+}
+
+void Resolver::resolveUdp(const std::string& addr, const std::string& port)
+{
+  cLog.msg(Log::PRIO_DEBUG) << "trying to resolv UDP: " << addr << " " << port;
+
+  boost::asio::ip::udp::resolver::query query(addr, port);
+  UdpResolveHandler handler(addr, port);
+  udp_resolver_.async_resolve(query, handler);
+}
+
+void Resolver::resolveTcp(const std::string& addr, const std::string& port)
+{
+  cLog.msg(Log::PRIO_DEBUG) << "trying to resolv TCP: " << addr << " " << port;
+
+  boost::asio::ip::tcp::resolver::query query(addr, port);
+  TcpResolveHandler handler(addr, port);
+  tcp_resolver_.async_resolve(query, handler); 
+}