code changes

2013-10-10 11:06:36 +02:00
parent b0503d5fa3
commit 58ed53a5d5
42 changed files with 2848 additions and 362 deletions
@@ -0,0 +1,110 @@
+/*
+ * 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/>.
+ */
+#ifndef INCLUDED_IEEE802_11_OFDM_UTILS_H
+#define INCLUDED_IEEE802_11_OFDM_UTILS_H
+
+#include <ieee802-11/api.h>
+#include <ieee802-11/ofdm_mapper.h>
+#include <cinttypes>
+#include <iostream>
+
+#define dout d_debug && std::cout
+#define mylog(msg) do { if(d_log) *d_logger << log4cpp::Priority::INFO << msg << log4cpp::eol; } while(0);
+
+struct MAC_DATAFRAME_HEADER {
+	//protocol version, type, subtype, to_ds, from_ds, ...
+	char frame_control[2];
+	char duration[2];
+	char address1[6];
+	char address2[6];
+	char address3[6];
+	uint16_t sequence;
+}__attribute__((packed));
+
+/**
+ * OFDM parameters
+ */
+class ofdm_param {
+public:
+	ofdm_param(Encoding e);
+
+	// data rate
+	Encoding encoding;
+	// rate field of the SIGNAL header
+	char     rate_field;
+	// number of coded bits per sub carrier
+	int      n_bpsc;
+	// number of coded bits per OFDM symbol
+	int      n_cbps;
+	// number of data bits per OFDM symbol
+	int      n_dbps;
+
+	void print_out();
+};
+
+/**
+ * packet specific parameters
+ */
+class tx_param {
+public:
+	tx_param(ofdm_param &ofdm, int psdu_length);
+	// PSDU size in bytes
+	int psdu_size;
+	// number of OFDM symbols (17-11)
+	int n_sym;
+	// number of data bits in the DATA field, including service and padding (17-12)
+	int n_data;
+	// number of padding bits in the DATA field (17-13)
+	int n_pad;
+	int n_encoded_bits;
+
+	void print_out();
+};
+
+/**
+ * Given a payload, generates a MAC data frame (i.e., a PSDU) to be given
+ * to the physical layer for encoding.
+ *
+ * \param msdu the payload for the MAC frame
+ * \param msdu_size the size of the msdu in bytes
+ * \param psdu pointer to a byte array where to store the MAC frame. Memory
+ * will be alloced by the function
+ * \param psdu_size pointer to an integer where the size of the psdu in bytes
+ * will be stored
+ * \param seq sequence number of the frame
+ */
+void generate_mac_data_frame(const char *msdu, int msdu_size, char **psdu, int *psdu_size, char seq);
+
+
+void scramble(const char *input, char *out, tx_param &tx, char initial_state);
+
+void reset_tail_bits(char *scrambled_data, tx_param &tx);
+
+void convolutional_encoding(const char *input, char *out, tx_param &tx);
+
+void puncturing(const char *input, char *out, tx_param &tx, ofdm_param &ofdm);
+
+void interleave(const char *input, char *out, tx_param &tx, ofdm_param &ofdm, bool reverse = false);
+void interleave(const double *input, double *out, tx_param &tx, ofdm_param &ofdm, bool reverse = false);
+
+void split_symbols(const char *input, char *out, tx_param &tx, ofdm_param &ofdm);
+
+void generate_signal_field(char *out, tx_param &tx, ofdm_param &ofdm);
+
+void generate_bits(const char *psdu, char *data_bits, tx_param &tx);
+
+#endif /* INCLUDED_IEEE802_11_OFDM_UTILS_H */