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-rw-r--r--anyrtpproxy/portWindow.cpp85
1 files changed, 85 insertions, 0 deletions
diff --git a/anyrtpproxy/portWindow.cpp b/anyrtpproxy/portWindow.cpp
new file mode 100644
index 0000000..3d96a06
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+++ b/anyrtpproxy/portWindow.cpp
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+/*
+ * 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 anytun.org <satp@wirdorange.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * 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 (see the file COPYING included with this
+ * distribution); if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include "portWindow.h"
+
+PortWindow::PortWindow(u_int16_t start, u_int16_t end) : start_port_(start), end_port_(end)
+{
+}
+
+PortWindow::~PortWindow()
+{
+}
+
+PortWindow::PortSet::size_type PortWindow::getLength()
+{
+ Lock lock(mutex_);
+ return ports_.size();
+}
+
+bool PortWindow::hasPort(u_int16_t port)
+{
+ Lock lock(mutex_);
+
+ PortSet::const_iterator it=ports_.find(port);
+ if(it == ports_.end())
+ return false;
+ return true;
+}
+
+bool PortWindow::freePort(u_int16_t port)
+{
+ Lock lock(mutex_);
+
+ PortSet::iterator it=ports_.find(port);
+ if(it == ports_.end())
+ return false;
+ ports_.erase(it);
+ return true;
+}
+
+u_int16_t PortWindow::newPort()
+{
+ Lock lock(mutex_);
+ u_int16_t port= start_port_;
+ while (port<end_port_ && ports_.find(port) !=ports_.end())
+ port++;
+ if (port>=end_port_)
+ return 0;
+ ports_.insert(port);
+ return port;
+}
+
+void PortWindow::clear()
+{
+ Lock lock(mutex_);
+ ports_.clear();
+}
+