1 files changed, 80 insertions, 0 deletions
diff --git a/gr-blocks/lib/random_pdu_impl.cc b/gr-blocks/lib/random_pdu_impl.cc
new file mode 100644
index 0000000000..0b194a0537
--- /dev/null
+++ b/gr-blocks/lib/random_pdu_impl.cc
@@ -0,0 +1,80 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2013 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio 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.
+ *
+ * GNU Radio 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 GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "random_pdu_impl.h"
+#include <gr_io_signature.h>
+#include <blocks/pdu.h>
+
+namespace gr {
+  namespace blocks {
+
+    random_pdu::sptr
+    random_pdu::make(int min_items, int max_items)
+    {
+      return gnuradio::get_initial_sptr(new random_pdu_impl(min_items, max_items));
+    }
+
+    random_pdu_impl::random_pdu_impl(int min_items, int max_items)
+      :	gr_block("random_pdu",
+		 gr_make_io_signature (0, 0, 0),
+		 gr_make_io_signature (0, 0, 0)),
+	d_urange(min_items, max_items),
+	d_brange(0, 255),
+	d_rvar(d_rng, d_urange),
+	d_bvar(d_rng, d_brange)
+    {
+      message_port_register_out(PDU_PORT_ID);
+      message_port_register_in(pmt::mp("generate"));
+      set_msg_handler(pmt::mp("generate"), boost::bind(&random_pdu_impl::generate_pdu, this, _1));
+    }
+
+    bool
+    random_pdu_impl::start() 
+    {
+      output_random();
+      return true;
+    }
+
+    void
+    random_pdu_impl::output_random()
+    {
+      // pick a random vector length
+      int len = d_rvar();
+
+      // fill it with random bytes
+      std::vector<unsigned char> vec;
+      for (int i=0; i<len; i++)
+        vec.push_back((unsigned char) d_bvar());
+      
+      // send the vector
+      pmt::pmt_t vecpmt(pmt::make_blob(&vec[0], len));
+      pmt::pmt_t pdu(pmt::cons(pmt::PMT_NIL, vecpmt));
+
+      message_port_pub(PDU_PORT_ID, pdu);
+    }
+
+  } /* namespace blocks */
+}/* namespace gr */