Module: PWN::SDR::Decoder::LTE

Defined in:
lib/pwn/sdr/decoder/lte.rb

Overview

True-air + detector-fallback decoder for LTE. Prefers PWN::FFI I/Q (RTL-SDR / ADALM-Pluto / HackRF / capture file) via Base.run_iq; degrades to Base.run_detector with no hardware.

Defined Under Namespace

Classes: DemodIQ

Class Method Summary collapse

Class Method Details

.authors ⇒ Object

Author(s)

0day Inc. support@0dayinc.com



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# File 'lib/pwn/sdr/decoder/lte.rb', line 111

public_class_method def self.authors
  "AUTHOR(S):\n  0day Inc. <support@0dayinc.com>\n"
end

.decode(opts = {}) ⇒ Object

Supported Method Parameters

PWN::SDR::Decoder::LTE.decode( freq_obj: 'required - freq_obj returned from PWN::SDR::GQRX.init_freq' )



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# File 'lib/pwn/sdr/decoder/lte.rb', line 74

public_class_method def self.decode(opts = {})
  freq_obj = opts[:freq_obj]

  rate  = (opts[:sample_rate] || freq_obj[:iq_rate] || 2_000_000).to_i
  proto = 'LTE'
  demod = DemodIQ.new(
    rate: rate, protocol: proto, modulation: 'OFDMA',
    extra: { threshold: 4.0 }
  )
  PWN::SDR::Decoder::Base.run_iq(
    freq_obj: freq_obj,
    protocol: proto,
    sample_rate: rate,
    source: opts[:source],
    file: opts[:file],
    demod: demod,
    threshold: 4.0,
    note: 'OFDMA 1.4–20 MHz — true-air I/Q path reports channel occupancy; PSS/SSS cell search layered on FFTW when available.',
    describe: proc { |_b| { modulation: 'OFDMA', subcarrier_khz: 15 } }
  )
end

.help ⇒ Object 



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# File 'lib/pwn/sdr/decoder/lte.rb', line 115

public_class_method def self.help
  puts "USAGE (true-air I/Q via PWN::FFI + detector fallback):
    #{self}.decode(
      freq_obj: 'required - freq_obj returned from PWN::SDR::GQRX.init_freq',
      source:   'optional - :auto|:rtlsdr|:adalm_pluto|:file',
      file:     'optional - .cu8/.cs16 capture'
    )

    #{self}.authors
  "
end

.parse_line(opts = {}) ⇒ Object 



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# File 'lib/pwn/sdr/decoder/lte.rb', line 96

public_class_method def self.parse_line(opts = {})
  line = opts[:line].to_s
  out  = { protocol: 'LTE' }
  out[:earfcn] = ::Regexp.last_match(1) if line =~ /EARFCN[:= ]+(\d+)/i
  out[:pci]    = ::Regexp.last_match(1) if line =~ /(?:PCI|N_id_cell|Id)[:= ]+(\d{1,3})/i
  out[:prb]    = (::Regexp.last_match(1) || ::Regexp.last_match(2)) if line =~ /(?:PRB[:= ]+(\d+)|(\d+)\s*PRB)/i
  out[:cp]     = ::Regexp.last_match(1) if line =~ /\b(Normal|Extended)\b\s*CP/i
  out[:rsrp]   = ::Regexp.last_match(1) if line =~ /(-?\d+(?:\.\d+)?)\s*dBm/
  out[:freq_mhz] = ::Regexp.last_match(1) if line =~ /(\d{3,4}\.\d)\s*MHz/
  out[:summary] = "LTE PCI=#{out[:pci]} EARFCN=#{out[:earfcn]} PRB=#{out[:prb]} RSRP=#{out[:rsrp]}dBm"
  out.compact
end