1 files changed, 84 insertions, 0 deletions
diff --git a/blocks/src/lib/p25cai_du_handler.h b/blocks/src/lib/p25cai_du_handler.h
new file mode 100644
index 0000000..4a601bb
--- /dev/null
+++ b/blocks/src/lib/p25cai_du_handler.h
@@ -0,0 +1,84 @@
+/* -*- C++ -*- */
+
+/*
+ * Copyright 2008-2011 Steve Glass
+ * 
+ * This file is part of OP25.
+ * 
+ * OP25 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, or (at your option)
+ * any later version.
+ * 
+ * OP25 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 OP25; see the file COPYING.  If not, write to the Free
+ * Software Foundation, Inc., 51 Franklin Street, Boston, MA
+ * 02110-1301, USA.
+*/
+
+#ifndef INCLUDED_P25CAI_DU_HANDLER_H
+#define INCLUDED_P25CAI_DU_HANDLER_H
+
+#include <data_unit_handler.h>
+#include <string>
+
+/**
+ * This data_unit_handler forwards received frames using p25cai - a
+ * straighforward encapsulation of the P25 CAI in a UDP datagram. This
+ * format is understood by Wireshark and replaces the use of TUN/TAP
+ * which require root privileges and are not present by default on
+ * some platforms.
+ */
+class p25cai_du_handler : public data_unit_handler
+{
+
+public:
+
+   /**
+    * p25cai_du_handler constructor.
+    *
+    * \param next The next data_unit_handler.
+	 * \param addr The address of the receiver.
+	 * \param port The port number of the receiver.
+    */
+   p25cai_du_handler(data_unit_handler_sptr next, const char *addr, int port);
+
+   /**
+    * p25cai_du_handler virtual destructor.
+    */
+   virtual ~p25cai_du_handler();
+
+   /**
+    * Handle a received P25 frame.
+    *
+    * \param du A non-null data_unit_sptr to handle.
+    */
+   virtual void handle(data_unit_sptr du);
+
+   /**
+    * Return a pointer to a string identifying the destination address.
+    *
+    * \return A pointer to a NUL-terminated character string.
+    */
+   const char *destination() const;
+
+private:
+
+   /**
+    * file descriptor for the UDP socket.
+    */
+   int32_t d_cai;
+
+   /**
+    * A string identifying the address of the receiver.
+    */
+   std::string d_address;
+
+};
+
+#endif /* INCLUDED_P25CAI_DU_HANDLER_H */