diff options
-rw-r--r-- | grc/gsm_block_tree.xml | 1 | ||||
-rw-r--r-- | grc/misc_utils/CMakeLists.txt | 1 | ||||
-rw-r--r-- | grc/misc_utils/gsm_extract_immediate_assignment.xml | 12 | ||||
-rw-r--r-- | include/grgsm/misc_utils/CMakeLists.txt | 1 | ||||
-rw-r--r-- | include/grgsm/misc_utils/extract_immediate_assignment.h | 56 | ||||
-rw-r--r-- | lib/CMakeLists.txt | 1 | ||||
-rw-r--r-- | lib/misc_utils/extract_immediate_assignment_impl.cc | 200 | ||||
-rw-r--r-- | lib/misc_utils/extract_immediate_assignment_impl.h | 43 | ||||
-rw-r--r-- | swig/grgsm_swig.i | 3 |
9 files changed, 318 insertions, 0 deletions
diff --git a/grc/gsm_block_tree.xml b/grc/gsm_block_tree.xml index 3952fff..94d1d82 100644 --- a/grc/gsm_block_tree.xml +++ b/grc/gsm_block_tree.xml @@ -43,6 +43,7 @@ <block>gsm_burst_sink</block> <block>gsm_burst_source</block> <block>gsm_extract_system_info</block> + <block>gsm_extract_immediate_assignment</block> <block>gsm_controlled_rotator_cc</block> <block>gsm_controlled_const_source_f</block> <block>gsm_message_printer</block> diff --git a/grc/misc_utils/CMakeLists.txt b/grc/misc_utils/CMakeLists.txt index aa7517c..d545692 100644 --- a/grc/misc_utils/CMakeLists.txt +++ b/grc/misc_utils/CMakeLists.txt @@ -19,6 +19,7 @@ install(FILES gsm_extract_system_info.xml + gsm_extract_immediate_assignment.xml gsm_controlled_rotator_cc.xml gsm_controlled_const_source_f.xml gsm_message_printer.xml diff --git a/grc/misc_utils/gsm_extract_immediate_assignment.xml b/grc/misc_utils/gsm_extract_immediate_assignment.xml new file mode 100644 index 0000000..0f5635b --- /dev/null +++ b/grc/misc_utils/gsm_extract_immediate_assignment.xml @@ -0,0 +1,12 @@ +<?xml version="1.0"?> +<block> + <name>Extract immediate assignment</name> + <key>gsm_extract_immediate_assignment</key> + <import>import grgsm</import> + <make>grgsm.extract_immediate_assignment()</make> + + <sink> + <name>msgs</name> + <type>message</type> + </sink> +</block> diff --git a/include/grgsm/misc_utils/CMakeLists.txt b/include/grgsm/misc_utils/CMakeLists.txt index 3d3383a..3d63d46 100644 --- a/include/grgsm/misc_utils/CMakeLists.txt +++ b/include/grgsm/misc_utils/CMakeLists.txt @@ -25,6 +25,7 @@ install(FILES burst_sink.h burst_source.h extract_system_info.h + extract_immediate_assignment.h controlled_rotator_cc.h controlled_const_source_f.h message_printer.h diff --git a/include/grgsm/misc_utils/extract_immediate_assignment.h b/include/grgsm/misc_utils/extract_immediate_assignment.h new file mode 100644 index 0000000..74e69a4 --- /dev/null +++ b/include/grgsm/misc_utils/extract_immediate_assignment.h @@ -0,0 +1,56 @@ +/* -*- c++ -*- */ +/* + * @file + * @author Roman Khassraf <rkhassraf@gmail.com> + * @section LICENSE + * + * Gr-gsm 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. + * + * Gr-gsm 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 gr-gsm; see the file COPYING. If not, write to + * the Free Software Foundation, Inc., 51 Franklin Street, + * Boston, MA 02110-1301, USA. + */ + + +#ifndef INCLUDED_GSM_EXTRACT_IMMEDIATE_ASSIGNMENT_H +#define INCLUDED_GSM_EXTRACT_IMMEDIATE_ASSIGNMENT_H + +#include <grgsm/api.h> +#include <gnuradio/block.h> + +namespace gr { + namespace gsm { + + /*! + * \brief <+description of block+> + * \ingroup gsm + * + */ + class GSM_API extract_immediate_assignment : virtual public gr::block + { + public: + typedef boost::shared_ptr<extract_immediate_assignment> sptr; + + /*! + * \brief Return a shared_ptr to a new instance of gsm::extract_immediate_assignment. + * + * To avoid accidental use of raw pointers, gsm::extract_immediate_assignment's + * constructor is in a private implementation + * class. gsm::extract_immediate_assignment::make is the public interface for + * creating new instances. + */ + static sptr make(); + }; + } // namespace gsm +} // namespace gr + +#endif /* INCLUDED_GSM_EXTRACT_IMMEDIATE_ASSIGNMENT_H */ diff --git a/lib/CMakeLists.txt b/lib/CMakeLists.txt index 4a88edb..7a8cf94 100644 --- a/lib/CMakeLists.txt +++ b/lib/CMakeLists.txt @@ -33,6 +33,7 @@ list(APPEND grgsm_sources receiver/cx_channel_hopper_impl.cc misc_utils/bursts_printer_impl.cc misc_utils/extract_system_info_impl.cc + misc_utils/extract_immediate_assignment_impl.cc demapping/universal_ctrl_chans_demapper_impl.cc demapping/tch_f_chans_demapper_impl.cc decoding/control_channels_decoder_impl.cc diff --git a/lib/misc_utils/extract_immediate_assignment_impl.cc b/lib/misc_utils/extract_immediate_assignment_impl.cc new file mode 100644 index 0000000..b7df803 --- /dev/null +++ b/lib/misc_utils/extract_immediate_assignment_impl.cc @@ -0,0 +1,200 @@ +/* -*- c++ -*- */ +/* + * @file + * @author Roman Khassraf <rkhassraf@gmail.com> + * @section LICENSE + * + * Gr-gsm 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. + * + * Gr-gsm 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 gr-gsm; 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 <gnuradio/io_signature.h> +#include <grgsm/gsmtap.h> +#include <unistd.h> +#include <set> +#include <iterator> +#include <algorithm> +#include <iostream> + +#include "extract_immediate_assignment_impl.h" + +namespace gr { + namespace gsm { + boost::mutex extract_immediate_assignment_mutex; + + void extract_immediate_assignment_impl::process_message(pmt::pmt_t msg){ + pmt::pmt_t message_plus_header_blob = pmt::cdr(msg); + uint8_t * message_plus_header = (uint8_t *)pmt::blob_data(message_plus_header_blob); + gsmtap_hdr * header = (gsmtap_hdr *)message_plus_header; + uint8_t * msg_elements = (uint8_t *)(message_plus_header+sizeof(gsmtap_hdr)); + uint32_t frame_nr = be32toh(header->frame_number); + + if(msg_elements[2]==0x3f) + { + std::cout << "\n------------------------------------------------------------------\n" << std::endl; + std::cout << "Immediate assignment found !" << std::endl; + std::cout << "FrameNr: " << (unsigned)frame_nr << std::endl; + + uint8_t mode = msg_elements[3] & (1 << 4); + + /* + channel description, see table 10.23 in GSM 04.08 + + msg_elements[4], octet 2 in specs + + 5 bits channel type + ignored in TBF + 00001 TCH/F + 0001T TCH/H, subchannel/TDMA offset T + 001TT SDCCH/4, subchannel/TDMA offset TT + 01TTT SDCCH/8, subchannel/TDMA offset TTT + 3 bits timeslot number TN + */ + uint8_t channeltype = (msg_elements[4] >> 3); + uint8_t timeslot = (msg_elements[4] & 7); + uint8_t subchannel; + std::string channel_type; + + std::cout << "Timeslot: " << (unsigned)timeslot << std::endl; + + if (mode == 0) + { + if (channeltype >= 8) + { + channel_type = "SDCCH/8"; + subchannel = (channeltype & 7); + } + else if (channeltype >= 4 && channeltype <= 7) + { + channel_type = "SDCCH/4"; + subchannel = (channeltype & 3); + } + else if (channeltype >= 2 && channeltype <= 3) + { + channel_type = "TCH/H"; + subchannel = (channeltype & 1); + } + else + { + channel_type = "TCH/F"; + subchannel = 0; + } + + std::cout << "Channel type: " << channel_type << std::endl; + std::cout << "Subchannel: " << (unsigned)subchannel << std::endl; + } + else + { + std::cout << "Channel type: " << "GPRS - Temporary Block Flow TBF" << std::endl; + } + + /* + msg_elements[5], msg_elements[6] are octets 3 and 4 in specs + + 3 bits training sequence (we dont process this for the moment) + 1 bit hopping channel H + + if H = 0: + 2 bit spare + 2 bit high part of single channel arfcn + + 8 bit low part of single channel arfcn + + if H = 1: + 4 bit high part of MAIO + + 2 bit low part of MAIO + 6bit HSN + */ + uint8_t hopping = (msg_elements[5] >> 4) & 1; + + std::cout << "Hopping: " << (unsigned)hopping << std::endl; + + if (hopping) + { + uint8_t maio = (msg_elements[5] & 0xf) << 2; + maio |= (msg_elements[6] >> 6); + + uint8_t hsn = (msg_elements[6] & 0x3f); + + std::cout << "MAIO: " << (unsigned)maio << std::endl; + std::cout << "HSN: " << (unsigned)hsn << std::endl; + } + else + { + uint16_t arfcn = (msg_elements[5] & 3) << 8; + arfcn |= msg_elements[6]; + + std::cout << "ARFCN: " << (unsigned)arfcn << std::endl; + } + + // request reference as ID in set, so we get only one immediate assignment per reference + /* + msg_elements[7 - 9], octets 5 - 7 in specs : request reference, maybe later + + msg_elements[10]: timing advance + */ + uint8_t timing_advance = msg_elements[10]; + std::cout << "TA: " << (unsigned)timing_advance << std::endl; + + /* + msg_elements[11] - 20: mobile allocation, flexible length, see 10.5.2.21 + */ + + uint8_t mobile_allocation_len = msg_elements[11]; + if (mobile_allocation_len > 0) + { + uint8_t mobile_allocation[mobile_allocation_len]; + for (int i=0; i<mobile_allocation_len; i++) + { + mobile_allocation[i] = msg_elements[12 + i]; + std::cout << "MA: " << (unsigned)mobile_allocation[i] << std::endl; + } + } + } + } + + extract_immediate_assignment::sptr + extract_immediate_assignment::make() + { + return gnuradio::get_initial_sptr + (new extract_immediate_assignment_impl()); + } + + /* + * The private constructor + */ + extract_immediate_assignment_impl::extract_immediate_assignment_impl() + : gr::block("extract_immediate_assignment", + gr::io_signature::make(0, 0, 0), + gr::io_signature::make(0, 0, 0)) + { + message_port_register_in(pmt::mp("msgs")); + set_msg_handler(pmt::mp("msgs"), boost::bind(&extract_immediate_assignment_impl::process_message, this, _1)); + } + + /* + * Our virtual destructor. + */ + extract_immediate_assignment_impl::~extract_immediate_assignment_impl() + { + } + } /* namespace gsm */ +} /* namespace gr */ + diff --git a/lib/misc_utils/extract_immediate_assignment_impl.h b/lib/misc_utils/extract_immediate_assignment_impl.h new file mode 100644 index 0000000..2bb9538 --- /dev/null +++ b/lib/misc_utils/extract_immediate_assignment_impl.h @@ -0,0 +1,43 @@ +/* -*- c++ -*- */ +/* + * @file + * @author Roman Khassraf <rkhassraf@gmail.com> + * @section LICENSE + * + * Gr-gsm 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. + * + * Gr-gsm 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 gr-gsm; see the file COPYING. If not, write to + * the Free Software Foundation, Inc., 51 Franklin Street, + * Boston, MA 02110-1301, USA. + */ + +#ifndef INCLUDED_GSM_EXTRACT_IMMEDIATE_ASSIGNMENT_IMPL_H +#define INCLUDED_GSM_EXTRACT_IMMEDIATE_ASSIGNMENT_IMPL_H + +#include <grgsm/misc_utils/extract_immediate_assignment.h> + + +namespace gr { + namespace gsm { + + class extract_immediate_assignment_impl : public extract_immediate_assignment + { + private: + void process_message(pmt::pmt_t msg); + public: + extract_immediate_assignment_impl(); + ~extract_immediate_assignment_impl(); + }; + } // namespace gsm +} // namespace gr + +#endif /* INCLUDED_GSM_EXTRACT_IMMEDIATE_ASSIGNMENT_IMPL_H */ diff --git a/swig/grgsm_swig.i b/swig/grgsm_swig.i index f1f37bf..79831f8 100644 --- a/swig/grgsm_swig.i +++ b/swig/grgsm_swig.i @@ -20,6 +20,7 @@ #include "grgsm/misc_utils/controlled_const_source_f.h" #include "grgsm/misc_utils/controlled_rotator_cc.h" #include "grgsm/misc_utils/extract_system_info.h" +#include "grgsm/misc_utils/extract_immediate_assignment.h" #include "grgsm/misc_utils/message_printer.h" #include "grgsm/misc_utils/tmsi_dumper.h" #include "grgsm/misc_utils/burst_sink.h" @@ -55,6 +56,8 @@ GR_SWIG_BLOCK_MAGIC2(gsm, burst_sink); GR_SWIG_BLOCK_MAGIC2(gsm, burst_source); %include "grgsm/misc_utils/extract_system_info.h" GR_SWIG_BLOCK_MAGIC2(gsm, extract_system_info); +%include "grgsm/misc_utils/extract_immediate_assignment.h" +GR_SWIG_BLOCK_MAGIC2(gsm, extract_immediate_assignment); %include "grgsm/misc_utils/controlled_rotator_cc.h" GR_SWIG_BLOCK_MAGIC2(gsm, controlled_rotator_cc); %include "grgsm/misc_utils/controlled_const_source_f.h" |