t/gr-ieee802-11
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

update lib files

Browse Source
This commit is contained in:
Bastian Bloessl
2013-07-16 12:23:56 +02:00
parent 86f8787e86
commit d4b42d23ca
10 changed files with 192 additions and 225 deletions
Download Patch File Download Diff File Expand all files Collapse all files
lib/CMakeLists.txt
+2 -3
View File
@@ -21,6 +21,7 @@
include(GrPlatform) #define LIB_SUFFIX
list(APPEND gr_ieee802_11_sources
ether_encap_impl.cc
ofdm_decode_mac.cc
ofdm_decode_signal.cc
ofdm_equalize_symbols.cc
@@ -32,12 +33,10 @@ list(APPEND gr_ieee802_11_sources
list(APPEND gr_ieee802_11_libs
${Boost_LIBRARIES}
${GNURADIO_RUNTIME_LIBRARIES}
${GNURADIO_FILTER_LIBRARIES}
${GNURADIO_FFT_LIBRARIES}
)
add_library(gnuradio-ieee802_11 SHARED ${gr_ieee802_11_sources})
target_link_libraries(gnuradio-ieee802_11 ${gr_ieee802_11_libs} itpp)
target_link_libraries(gnuradio-ieee802_11 ${gr_ieee802_11_libs} itpp gnuradio-fft gnuradio-filter)
set_target_properties(gnuradio-ieee802_11 PROPERTIES DEFINE_SYMBOL "gnuradio_ieee802_11_EXPORTS")
########################################################################
lib/ether_encap_impl.cc
+99
View File
@@ -0,0 +1,99 @@
/*
* 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 "ether_encap_impl.h"
#include "ofdm_parse_mac_impl.h"
#include <gnuradio/io_signature.h>
#include <gnuradio/block_detail.h>
#include <string>
using namespace gr::ieee802_11;
#define dout d_debug && std::cout
ether_encap_impl::ether_encap_impl(bool debug) :
block("ether_encap",
gr::io_signature::make(0, 0, 0),
gr::io_signature::make(0, 0, 0)),
d_debug(debug),
d_last_seq(123) {
message_port_register_out(pmt::mp("out"));
message_port_register_in(pmt::mp("in"));
set_msg_handler(pmt::mp("in"), boost::bind(&ether_encap_impl::parse, this, _1));
}
void
ether_encap_impl::parse(pmt::pmt_t msg) {
if(pmt::is_eof_object(msg)) {
message_port_pub(pmt::mp("out"), pmt::PMT_EOF);
detail().get()->set_done(true);
return;
}
msg = pmt::cdr(msg);
int data_len = pmt::blob_length(msg);
const mac_header *mhdr = reinterpret_cast<const mac_header*>(pmt::blob_data(msg));
if(d_last_seq == mhdr->seq_control) {
dout << "Ether Encap: frame already seen -- skipping" << std::endl;
return;
}
d_last_seq = mhdr->seq_control;
if(data_len < 33) {
dout << "Ether Encap: frame too short to parse (<33)" << std::endl;
return;
}
ethernet_header *ehdr = reinterpret_cast<ethernet_header*>(buf);
if(((mhdr->frame_control >> 2) & 3) != 2) {
dout << "this is not a data frame -- ignoring" << std::endl;
return;
}
memcpy(ehdr->dest, mhdr->addr1, 6);
memcpy(ehdr->src, mhdr->addr2, 6);
ehdr->type = 0x0008;
char *frame = (char*)pmt::blob_data(msg);
// DATA
if((((mhdr->frame_control) >> 2) & 63) == 2) {
memcpy(buf + sizeof(ethernet_header), frame + 32, data_len - 32);
pmt::pmt_t payload = pmt::make_blob(buf, data_len - 32 + 14);
message_port_pub(pmt::mp("out"), pmt::cons(pmt::PMT_NIL, payload));
// QoS Data
} else if((((mhdr->frame_control) >> 2) & 63) == 34) {
memcpy(buf + sizeof(ethernet_header), frame + 34, data_len - 34);
pmt::pmt_t payload = pmt::make_blob(buf, data_len - 34 + 14);
message_port_pub(pmt::mp("out"), pmt::cons(pmt::PMT_NIL, payload));
}
}
ether_encap::sptr
ether_encap::make(bool debug) {
return gnuradio::get_initial_sptr(new ether_encap_impl(debug));
}
lib/ether_encap_impl.h
+48
View File
@@ -0,0 +1,48 @@
/*
* 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_ETHER_ENCAP_IMPL_H
#define INCLUDED_IEEE802_11_ETHER_ENCAP_IMPL_H
#include <ieee802-11/ether_encap.h>
namespace gr {
namespace ieee802_11 {
struct ethernet_header {
uint8_t dest[6];
uint8_t src[6];
uint16_t type;
}__attribute__((packed));
class ether_encap_impl : public ether_encap {
public:
ether_encap_impl(bool debug);
private:
void parse(pmt::pmt_t msg);
bool d_debug;
char buf[3000];
uint16_t d_last_seq;
};
} // namespace ieee802_11
} // namespace gr
#endif /* INCLUDED_IEEE802_11_ETHER_ENCAP_IMPL_H */
lib/ofdm_decode_mac.cc
+19 -149
View File
@@ -14,166 +14,25 @@
* 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 <gnuradio/ieee802_11/ofdm_decode_mac.h>
#include <ieee802-11/ofdm_decode_mac.h>
#include "ofdm_utils.h"
#include <boost/crc.hpp>
#include <gnuradio/io_signature.h>
#include <itpp/itcomm.h>
#include <iostream>
#include <iomanip>
using namespace gr::ieee802_11;
using namespace itpp;
enum ENCODING {
BPSK_1_2,
BPSK_3_4,
QPSK_1_2,
QPSK_3_4,
QAM16_1_2,
QAM16_3_4,
QAM64_2_3,
QAM64_3_4,
};
/**
* OFDM parameters
*/
class GR_IEEE802_11_API ofdm_param {
public:
ofdm_param(ENCODING e) {
encoding = e;
switch(e) {
case BPSK_1_2:
n_bpsc = 1;
n_cbps = 48;
n_dbps = 24;
rate_field = 0x0D; // 0b00001101
break;
case BPSK_3_4:
n_bpsc = 1;
n_cbps = 48;
n_dbps = 36;
rate_field = 0x0F; // 0b00001111
break;
case QPSK_1_2:
n_bpsc = 2;
n_cbps = 96;
n_dbps = 48;
rate_field = 0x05; // 0b00000101
break;
case QPSK_3_4:
n_bpsc = 2;
n_cbps = 96;
n_dbps = 72;
rate_field = 0x07; // 0b00000111
break;
case QAM16_1_2:
n_bpsc = 4;
n_cbps = 192;
n_dbps = 96;
rate_field = 0x09; // 0b00001001
break;
case QAM16_3_4:
n_bpsc = 4;
n_cbps = 192;
n_dbps = 144;
rate_field = 0x0B; // 0b00001011
break;
case QAM64_2_3:
n_bpsc = 6;
n_cbps = 288;
n_dbps = 192;
rate_field = 0x01; // 0b00000001
break;
case QAM64_3_4:
n_bpsc = 6;
n_cbps = 288;
n_dbps = 216;
rate_field = 0x03; // 0b00000011
break;
defaut:
assert(false);
break;
}
}
void print_out() {
std::cout << "OFDM Parameters:" << std::endl;
std::cout << "endcoding :" << encoding << std::endl;
std::cout << "rate_field :" << (int)rate_field << std::endl;
std::cout << "n_bpsc :" << n_bpsc << std::endl;
std::cout << "n_cbps :" << n_cbps << std::endl;
std::cout << "n_dbps :" << n_dbps << std::endl;
}
// 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;
};
/**
* packet specific parameters
*/
class tx_param {
public:
tx_param(ofdm_param &ofdm, int psdu_length) {
psdu_size = psdu_length;
// number of symbols (17-11)
n_sym = (int) ceil((16 + 8 * psdu_size + 6) / (double) ofdm.n_dbps);
// number of bits of the data field (17-12)
n_data = n_sym * ofdm.n_dbps;
// number of padding bits (17-13)
n_pad = n_data - (16 + 8 * psdu_size + 6);
n_encoded_bits = n_sym * ofdm.n_cbps;
}
// 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() {
std::cout << "TX Parameters:" << std::endl;
std::cout << "psdu_size: " << psdu_size << std::endl;
std::cout << "n_sym: " << n_sym << std::endl;
std::cout << "n_data: " << n_data << std::endl;
std::cout << "n_pad: " << n_pad << std::endl;
}
};
class ofdm_decode_mac_impl : public ofdm_decode_mac {
#define dout d_debug && std::cout
public:
ofdm_decode_mac_impl(bool debug) : gr::block("ofdm_decode_mac",
ofdm_decode_mac_impl(bool debug) : block("ofdm_decode_mac",
gr::io_signature::make(1, 1, 48 * sizeof(gr_complex)),
gr::io_signature::make(0, 0, 0)),
d_debug(debug),
@@ -253,8 +112,19 @@ void decode() {
print_output();
// skip service field
pmt::pmt_t blob = pmt::make_blob(out_bytes + 2, tx.psdu_size);
message_port_pub(pmt::mp("out"), blob);
boost::crc_32_type result;
result.process_bytes(out_bytes + 2, tx.psdu_size);
if(result.checksum() != 558161692) {
dout << "checksum wrong -- dropping" << std::endl;
return;
}
// create PDU
pmt::pmt_t blob = pmt::make_blob(out_bytes + 2, tx.psdu_size - 4);
pmt::pmt_t enc = pmt::from_uint64(ofdm.encoding);
pmt::pmt_t dict = pmt::make_dict();
dict = pmt::dict_add(dict, pmt::mp("encoding"), enc);
message_port_pub(pmt::mp("out"), pmt::cons(dict, blob));
}
void demodulate() {
lib/ofdm_decode_signal.cc
+3 -3
View File
@@ -14,7 +14,7 @@
* 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 <gnuradio/ieee802_11/ofdm_decode_signal.h>
#include <ieee802-11/ofdm_decode_signal.h>
#include <gnuradio/io_signature.h>
#include <iostream>
@@ -29,7 +29,7 @@ class ofdm_decode_signal_impl : public ofdm_decode_signal {
#define dout d_debug && std::cout
public:
ofdm_decode_signal_impl(bool debug) : gr::block("ofdm_decode_signal",
ofdm_decode_signal_impl(bool debug) : block("ofdm_decode_signal",
gr::io_signature::make(1, 1, 48 * sizeof(gr_complex)),
gr::io_signature::make(1, 1, 48 * sizeof(gr_complex))),
d_debug(debug),
@@ -37,7 +37,7 @@ ofdm_decode_signal_impl(bool debug) : gr::block("ofdm_decode_signal",
decoded_bits.set_size(24);
set_relative_rate(1);
set_tag_propagation_policy(gr::block::TPP_DONT);
set_tag_propagation_policy(block::TPP_DONT);
}
~ofdm_decode_signal_impl(){
lib/ofdm_equalize_symbols.cc
+2 -2
View File
@@ -14,7 +14,7 @@
* 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 <gnuradio/ieee802_11/ofdm_equalize_symbols.h>
#include <ieee802-11/ofdm_equalize_symbols.h>
#include <gnuradio/io_signature.h>
#include <iostream>
@@ -27,7 +27,7 @@ class ofdm_equalize_symbols_impl : public ofdm_equalize_symbols {
#define dout d_debug && std::cout
public:
ofdm_equalize_symbols_impl(bool debug) : gr::block("ofdm_equalize_symbols",
ofdm_equalize_symbols_impl(bool debug) : block("ofdm_equalize_symbols",
gr::io_signature::make(1, 1, 64 * sizeof(gr_complex)),
gr::io_signature::make(1, 1, 48 * sizeof(gr_complex))),
d_debug(debug) {
lib/ofdm_parse_mac.cc
+8 -57
View File
@@ -14,7 +14,7 @@
* 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 <gnuradio/ieee802_11/ofdm_parse_mac.h>
#include <ieee802-11/ofdm_parse_mac.h>
#include "ofdm_parse_mac_impl.h"
#include <gnuradio/io_signature.h>
@@ -30,7 +30,7 @@ class ofdm_parse_mac_impl : public ofdm_parse_mac {
public:
ofdm_parse_mac_impl(bool debug) :
gr::block("ofdm_parse_mac",
block("ofdm_parse_mac",
gr::io_signature::make(0, 0, 0),
gr::io_signature::make(0, 0, 0)),
d_debug(debug) {
@@ -45,41 +45,6 @@ ofdm_parse_mac_impl(bool debug) :
}
unsigned int update_crc32(unsigned int crc, const char *data, size_t len) {
int j;
unsigned int byte, mask;
static unsigned int table[256];
/* Set up the table if necesary */
if (table[1] == 0) {
for (byte = 0; byte <= 255; byte++) {
crc = byte;
for (j = 7; j >= 0; j--) {
mask = -(crc & 1);
crc = (crc >> 1) ^ (0xEDB88320 & mask);
}
table[byte] = crc;
}
}
/* Calculate the CRC32*/
size_t i = 0;
crc = 0xFFFFFFFF;
for (i = 0; i < len; i++) {
byte = data[i]; //Get next byte
crc = (crc >> 8) ^ table[(crc ^ byte) & 0xFF];
}
unsigned int crc_reversed;
crc_reversed = 0x00000000;
for (j = 31; j >= 0; j--) {
crc_reversed |= ((crc >> j) & 1) << (31 - j);
}
return crc;
}
unsigned int crc32(const char *buf, int len) {
return update_crc32(0xffffffff, buf, len) ^ 0xffffffff;
}
void parse(pmt::pmt_t msg) {
if(pmt::is_eof_object(msg)) {
@@ -88,7 +53,7 @@ void parse(pmt::pmt_t msg) {
return;
}
assert(pmt::is_blob(msg));
msg = pmt::cdr(msg);
int data_len = pmt::blob_length(msg);
mac_header *h = (mac_header*)pmt::blob_data(msg);
@@ -125,28 +90,22 @@ void parse(pmt::pmt_t msg) {
break;
}
bool crc = check_crc((char*)pmt::blob_data(msg), data_len);
dout << "crc ";
dout << (crc ? "correct" : "wrong") << std::endl;
if(!crc || data_len < 32) {
if(data_len < 32) {
return;
}
char *frame = (char*)pmt::blob_data(msg);
frame[data_len - 4] = '\n';
// DATA
if((((h->frame_control) >> 2) & 63) == 2) {
print_ascii(frame + 24, data_len - 24 - 4);
pmt::pmt_t payload = pmt::make_blob(frame + 24, data_len - 24 - 3);
print_ascii(frame + 24, data_len - 24);
pmt::pmt_t payload = pmt::make_blob(frame + 24, data_len - 24);
message_port_pub(pmt::mp("out"), pmt::cons(pmt::PMT_NIL, payload));
// QoS Data
} else if((((h->frame_control) >> 2) & 63) == 34) {
print_ascii(frame + 26, data_len - 26 - 4);
pmt::pmt_t payload = pmt::make_blob(frame + 26, data_len - 26 - 3);
print_ascii(frame + 26, data_len - 26);
pmt::pmt_t payload = pmt::make_blob(frame + 26, data_len - 26);
message_port_pub(pmt::mp("out"), pmt::cons(pmt::PMT_NIL, payload));
}
@@ -386,14 +345,6 @@ void print_ascii(char* buf, int length) {
dout << std::endl;
}
bool check_crc(char *data, int len) {
unsigned int crc = crc32(data, len);
if(crc == 558161692) {
return true;
}
return false;
}
private:
bool d_debug;
lib/ofdm_parse_mac_impl.h
+3 -3
View File
@@ -14,8 +14,8 @@
* 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_GR_IEEE802_11_OFDM_PARSE_MAC_IMPL_H
#define INCLUDED_GR_IEEE802_11_OFDM_PARSE_MAC_IMPL_H
#ifndef INCLUDED_IEEE802_11_OFDM_PARSE_MAC_IMPL_H
#define INCLUDED_IEEE802_11_OFDM_PARSE_MAC_IMPL_H
struct mac_header {
uint16_t frame_control;
@@ -26,5 +26,5 @@ struct mac_header {
uint16_t seq_control;
}__attribute__((packed));
#endif /* INCLUDED_GR_IEEE802_11_OFDM_PARSE_MAC_IMPL_H */
#endif /* INCLUDED_IEEE802_11_OFDM_PARSE_MAC_IMPL_H */
lib/ofdm_sync_long.cc
+3 -3
View File
@@ -14,7 +14,7 @@
* 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 <gnuradio/ieee802_11/ofdm_sync_long.h>
#include <ieee802-11/ofdm_sync_long.h>
#include <gnuradio/io_signature.h>
#include <gnuradio/filter/fir_filter.h>
#include <gnuradio/fft/fft.h>
@@ -31,7 +31,7 @@ class ofdm_sync_long_impl : public ofdm_sync_long {
#define dout d_debug && std::cout
public:
ofdm_sync_long_impl(unsigned int sync_lenght, unsigned int freq_est, bool debug) : gr::block("ofdm_sync_long",
ofdm_sync_long_impl(unsigned int sync_lenght, unsigned int freq_est, bool debug) : block("ofdm_sync_long",
gr::io_signature::make2(2, 2, sizeof(gr_complex), sizeof(gr_complex)),
gr::io_signature::make(1, 1, sizeof(gr_complex))),
d_debug(debug),
@@ -41,7 +41,7 @@ ofdm_sync_long_impl(unsigned int sync_lenght, unsigned int freq_est, bool debug)
SYNC_LENGTH(sync_lenght),
FREQ_EST(freq_est) {
set_tag_propagation_policy(gr::block::TPP_DONT);
set_tag_propagation_policy(block::TPP_DONT);
d_fir = new gr::filter::kernel::fir_filter_ccc(1, LONG);
d_correlation = gr::fft::malloc_complex(8192);
}
lib/ofdm_sync_short.cc
+3 -3
View File
@@ -14,7 +14,7 @@
* 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 <gnuradio/ieee802_11/ofdm_sync_short.h>
#include <ieee802-11/ofdm_sync_short.h>
#include <gnuradio/io_signature.h>
#include <iostream>
@@ -27,7 +27,7 @@ class ofdm_sync_short_impl : public ofdm_sync_short {
public:
ofdm_sync_short_impl(double threshold, unsigned int max_samples,
unsigned int min_plateau, bool debug) : gr::block("ofdm_sync_short",
unsigned int min_plateau, bool debug) : block("ofdm_sync_short",
gr::io_signature::make2(2, 2, sizeof(gr_complex), sizeof(float)),
gr::io_signature::make(1, 1, sizeof(gr_complex))),
d_debug(debug),
@@ -37,7 +37,7 @@ ofdm_sync_short_impl(double threshold, unsigned int max_samples,
MIN_PLATEAU(min_plateau),
d_threshold(threshold) {
set_tag_propagation_policy(gr::block::TPP_DONT);
set_tag_propagation_policy(block::TPP_DONT);
}
~ofdm_sync_short_impl(){