#!/usr/bin/env python2
# -*- coding: utf-8 -*-
# @file
# @author (C) 2017 by Piotr Krysik <ptrkrysik@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.
#
#
##################################################
# GNU Radio Python Flow Graph
# Title: Gr-gsm Livemon
# Author: Piotr Krysik
# Description: Interactive monitor of a single C0 channel with analysis performed by Wireshark (command to run wireshark: sudo wireshark -k -f udp -Y gsmtap -i lo)
# Generated: Wed Sep  6 16:27:23 2017
##################################################

from gnuradio import blocks
from gnuradio import eng_notation
from gnuradio import gr
from gnuradio.eng_option import eng_option
from gnuradio.filter import firdes
from grgsm import arfcn
from math import pi
from optparse import OptionParser
import grgsm
import osmosdr
import pmt
import time


class grgsm_livemon_headless(gr.top_block):

    def __init__(self, args="", collector="localhost", collectorport="4729", gain=30, osr=4, ppm=0, rec_len=1000000, samp_rate=2000000.052982, serverport="4729", shiftoff=400e3, fc=957e6):
        gr.top_block.__init__(self, "Gr-gsm Livemon")

        ##################################################
        # Parameters
        ##################################################
        self.args = args
        self.collector = collector
        self.collectorport = collectorport
        self.gain = gain
        self.osr = osr
        self.ppm = ppm
        self.rec_len = rec_len
        self.samp_rate = samp_rate
        self.serverport = serverport
        self.shiftoff = shiftoff
        self.fc = fc

        ##################################################
        # Blocks
        ##################################################
        self.rtlsdr_source_0 = osmosdr.source( args="numchan=" + str(1) + " " + args )
        self.rtlsdr_source_0.set_sample_rate(samp_rate)
        self.rtlsdr_source_0.set_center_freq(fc-shiftoff, 0)
        self.rtlsdr_source_0.set_freq_corr(ppm, 0)
        self.rtlsdr_source_0.set_dc_offset_mode(2, 0)
        self.rtlsdr_source_0.set_iq_balance_mode(2, 0)
        self.rtlsdr_source_0.set_gain_mode(False, 0)
        self.rtlsdr_source_0.set_gain(gain, 0)
        self.rtlsdr_source_0.set_if_gain(20, 0)
        self.rtlsdr_source_0.set_bb_gain(20, 0)
        self.rtlsdr_source_0.set_antenna("", 0)
        self.rtlsdr_source_0.set_bandwidth(250e3+abs(shiftoff), 0)
          
        self.gsm_sdcch8_demapper_0 = grgsm.gsm_sdcch8_demapper(
            timeslot_nr=1,
        )
        self.gsm_receiver_0 = grgsm.receiver(4, ([arfcn.downlink2arfcn(fc)]), ([]), False)
        self.gsm_message_printer_1 = grgsm.message_printer(pmt.intern(""), False,
            False, False)
        self.gsm_input_0 = grgsm.gsm_input(
            ppm=ppm-int(ppm),
            osr=4,
            fc=fc,
            samp_rate_in=samp_rate,
        )
        self.gsm_decryption_0 = grgsm.decryption(([]), 1)
        self.gsm_control_channels_decoder_0_0 = grgsm.control_channels_decoder()
        self.gsm_control_channels_decoder_0 = grgsm.control_channels_decoder()
        self.gsm_clock_offset_control_0 = grgsm.clock_offset_control(fc-shiftoff, samp_rate, osr)
        self.gsm_bcch_ccch_sdcch4_demapper_0 = grgsm.gsm_bcch_ccch_sdcch4_demapper(
            timeslot_nr=0,
        )
        self.blocks_socket_pdu_0_1 = blocks.socket_pdu("UDP_CLIENT", collector, collectorport, 1500, False)
        self.blocks_socket_pdu_0_0 = blocks.socket_pdu("UDP_SERVER", "127.0.0.1", serverport, 10000, False)
        self.blocks_rotator_cc_0 = blocks.rotator_cc(-2*pi*shiftoff/samp_rate)
        self.blocks_head_0 = blocks.head(gr.sizeof_gr_complex*1, int(rec_len*samp_rate))

        ##################################################
        # Connections
        ##################################################
        self.msg_connect((self.blocks_socket_pdu_0_0, 'pdus'), (self.gsm_message_printer_1, 'msgs'))    
        self.msg_connect((self.gsm_bcch_ccch_sdcch4_demapper_0, 'bursts'), (self.gsm_control_channels_decoder_0, 'bursts'))    
        self.msg_connect((self.gsm_clock_offset_control_0, 'ctrl'), (self.gsm_input_0, 'ctrl_in'))    
        self.msg_connect((self.gsm_control_channels_decoder_0, 'msgs'), (self.blocks_socket_pdu_0_1, 'pdus'))    
        self.msg_connect((self.gsm_control_channels_decoder_0_0, 'msgs'), (self.blocks_socket_pdu_0_1, 'pdus'))    
        self.msg_connect((self.gsm_decryption_0, 'bursts'), (self.gsm_control_channels_decoder_0_0, 'bursts'))    
        self.msg_connect((self.gsm_receiver_0, 'C0'), (self.gsm_bcch_ccch_sdcch4_demapper_0, 'bursts'))    
        self.msg_connect((self.gsm_receiver_0, 'measurements'), (self.gsm_clock_offset_control_0, 'measurements'))    
        self.msg_connect((self.gsm_receiver_0, 'C0'), (self.gsm_sdcch8_demapper_0, 'bursts'))    
        self.msg_connect((self.gsm_sdcch8_demapper_0, 'bursts'), (self.gsm_decryption_0, 'bursts'))    
        self.connect((self.blocks_head_0, 0), (self.blocks_rotator_cc_0, 0))    
        self.connect((self.blocks_rotator_cc_0, 0), (self.gsm_input_0, 0))    
        self.connect((self.gsm_input_0, 0), (self.gsm_receiver_0, 0))    
        self.connect((self.rtlsdr_source_0, 0), (self.blocks_head_0, 0))    

    def get_args(self):
        return self.args

    def set_args(self, args):
        self.args = args

    def get_collector(self):
        return self.collector

    def set_collector(self, collector):
        self.collector = collector

    def get_collectorport(self):
        return self.collectorport

    def set_collectorport(self, collectorport):
        self.collectorport = collectorport

    def get_gain(self):
        return self.gain

    def set_gain(self, gain):
        self.gain = gain
        self.rtlsdr_source_0.set_gain(self.gain, 0)

    def get_osr(self):
        return self.osr

    def set_osr(self, osr):
        self.osr = osr

    def get_ppm(self):
        return self.ppm

    def set_ppm(self, ppm):
        self.ppm = ppm
        self.gsm_input_0.set_ppm(self.ppm-int(self.ppm))
        self.rtlsdr_source_0.set_freq_corr(self.ppm, 0)

    def get_rec_len(self):
        return self.rec_len

    def set_rec_len(self, rec_len):
        self.rec_len = rec_len
        self.blocks_head_0.set_length(int(self.rec_len*self.samp_rate))

    def get_samp_rate(self):
        return self.samp_rate

    def set_samp_rate(self, samp_rate):
        self.samp_rate = samp_rate
        self.blocks_head_0.set_length(int(self.rec_len*self.samp_rate))
        self.blocks_rotator_cc_0.set_phase_inc(-2*pi*self.shiftoff/self.samp_rate)
        self.gsm_input_0.set_samp_rate_in(self.samp_rate)
        self.rtlsdr_source_0.set_sample_rate(self.samp_rate)

    def get_serverport(self):
        return self.serverport

    def set_serverport(self, serverport):
        self.serverport = serverport

    def get_shiftoff(self):
        return self.shiftoff

    def set_shiftoff(self, shiftoff):
        self.shiftoff = shiftoff
        self.blocks_rotator_cc_0.set_phase_inc(-2*pi*self.shiftoff/self.samp_rate)
        self.rtlsdr_source_0.set_center_freq(self.fc-self.shiftoff, 0)
        self.rtlsdr_source_0.set_bandwidth(250e3+abs(self.shiftoff), 0)

    def get_fc(self):
        return self.fc

    def set_fc(self, fc):
        self.fc = fc
        self.gsm_input_0.set_fc(self.fc)
        self.rtlsdr_source_0.set_center_freq(self.fc-self.shiftoff, 0)


def argument_parser():
    parser = OptionParser(option_class=eng_option, usage="%prog: [options]")
    parser.add_option(
        "", "--args", dest="args", type="string", default="",
        help="Set Device Arguments [default=%default]")
    parser.add_option(
        "", "--collector", dest="collector", type="string", default="localhost",
        help="Set IP or DNS name of collector point [default=%default]")
    parser.add_option(
        "", "--collectorport", dest="collectorport", type="string", default="4729",
        help="Set UDP port number of collector [default=%default]")
    parser.add_option(
        "-g", "--gain", dest="gain", type="eng_float", default=eng_notation.num_to_str(30),
        help="Set RF Gain [default=%default]")
    parser.add_option(
        "", "--osr", dest="osr", type="intx", default=4,
        help="Set OverSampling Ratio [default=%default]")
    parser.add_option(
        "-p", "--ppm", dest="ppm", type="eng_float", default=eng_notation.num_to_str(0),
        help="Set Clock frequency offset in ppms (1/1e6 parts) [default=%default]")
    parser.add_option(
        "-T", "--rec-len", dest="rec_len", type="eng_float", default=eng_notation.num_to_str(1000000),
        help="Set Recording length in seconds [default=%default]")
    parser.add_option(
        "-s", "--samp-rate", dest="samp_rate", type="eng_float", default=eng_notation.num_to_str(2000000.052982),
        help="Set samp_rate [default=%default]")
    parser.add_option(
        "", "--serverport", dest="serverport", type="string", default="4729",
        help="Set UDP server listening port [default=%default]")
    parser.add_option(
        "-o", "--shiftoff", dest="shiftoff", type="eng_float", default=eng_notation.num_to_str(400e3),
        help="Set Frequency Shiftoff [default=%default]")
    parser.add_option(
        "-f", "--fc", dest="fc", type="eng_float", default=eng_notation.num_to_str(957e6),
        help="Set GSM channel's central frequency [default=%default]")
    return parser


def main(top_block_cls=grgsm_livemon_headless, options=None):
    if options is None:
        options, _ = argument_parser().parse_args()

    tb = top_block_cls(args=options.args, collector=options.collector, collectorport=options.collectorport, gain=options.gain, osr=options.osr, ppm=options.ppm, rec_len=options.rec_len, samp_rate=options.samp_rate, serverport=options.serverport, shiftoff=options.shiftoff, fc=options.fc)
    tb.start()
    tb.wait()


if __name__ == '__main__':
    main()