add packet_header_generator

2013-12-31 12:51:19 +01:00
parent d6e1a1a4d0
commit dab44836f5
4 changed files with 206 additions and 0 deletions
@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2013 Bastian Bloessl <bloessl@ccs-labs.org>
+ *
+ * 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/>.
+ */
+#include <boost/format.hpp>
+#include <gnuradio/io_signature.h>
+#include "packet_headergenerator_impl.h"
+
+using namespace gr::ieee802_11;
+
+packet_headergenerator::sptr packet_headergenerator::make(
+		const digital::packet_header_default::sptr &header_formatter,
+		const std::string &len_tag_key) {
+	return gnuradio::get_initial_sptr (new packet_headergenerator_impl(header_formatter, len_tag_key));
+}
+
+
+packet_headergenerator::sptr packet_headergenerator::make(
+		long header_len,
+		const std::string &len_tag_key) {
+	const digital::packet_header_default::sptr header_formatter(
+		new digital::packet_header_default(header_len, len_tag_key));
+	return gnuradio::get_initial_sptr (new packet_headergenerator_impl(header_formatter, len_tag_key));
+}
+
+
+    packet_headergenerator_impl::packet_headergenerator_impl(
+		    const gr::digital::packet_header_default::sptr &header_formatter,
+		    const std::string &len_tag_key
+		    )
+      : tagged_stream_block("packet_headergenerator_impl",
+		       io_signature::make(1, 1, sizeof (char)),
+		       io_signature::make(1, 1, sizeof (char)),
+		       len_tag_key),
+	    d_formatter(header_formatter)
+    {
+      set_output_multiple(d_formatter->header_len());
+      // This is the worst case rate, because we don't know the true value, of course
+      set_relative_rate(d_formatter->header_len());
+      set_tag_propagation_policy(TPP_DONT);
+    }
+
+    packet_headergenerator_impl::~packet_headergenerator_impl()
+    {
+    }
+
+    int
+    packet_headergenerator_impl::work (int noutput_items,
+                       gr_vector_int &ninput_items,
+                       gr_vector_const_void_star &input_items,
+                       gr_vector_void_star &output_items)
+    {
+      unsigned char *out = (unsigned char *) output_items[0];
+      std::vector<tag_t> all_tags;
+      get_tags_in_range(all_tags, 0, nitems_read(0), nitems_read(0) + ninput_items[0]);
+      if (!d_formatter->header_formatter(ninput_items[0], out, all_tags)) {
+	GR_LOG_FATAL(d_logger, boost::format("header_formatter() returned false (this shouldn't happen). Offending header started at %1%") % nitems_read(0));
+	throw std::runtime_error("header formatter returned false.");
+      }
+
+      return d_formatter->header_len();
+    }
+