Module: PWN::SDR::Decoder::DECT

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

Overview

True-air + detector-fallback decoder for DECT. 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/dect.rb', line 110

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



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# File 'lib/pwn/sdr/decoder/dect.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 = 'DECT'
  demod = DemodIQ.new(
    rate: rate, protocol: proto, modulation: 'GFSK',
    extra: { threshold: 7.0 }
  )
  PWN::SDR::Decoder::Base.run_iq(
    freq_obj: freq_obj,
    protocol: proto,
    sample_rate: rate,
    source: opts[:source],
    file: opts[:file],
    demod: demod,
    threshold: 7.0,
    note: '1.152 Mbit/s GFSK 24-slot TDMA — true-air I/Q path reports slot bursts.',
    describe: proc { |b| { modulation: 'GFSK', tdma_slots: (b[:duration_ms] / 0.417).round, classification: (b[:duration_ms] / 0.417).round >= 24 ? 'FP-beacon-frame' : 'PP-burst' } }
  )
end

.help ⇒ Object 



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# File 'lib/pwn/sdr/decoder/dect.rb', line 114

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/dect.rb', line 96

public_class_method def self.parse_line(opts = {})
  line = opts[:line].to_s
  out  = { protocol: 'DECT' }
  out[:rfpi]    = ::Regexp.last_match(1).delete(' ') if line =~ /RFPI[:=]?\s*((?:[0-9A-Fa-f]{2}\s*){5})/
  out[:slot]    = ::Regexp.last_match(1) if line =~ /slot\s*(\d+)/i
  out[:carrier] = ::Regexp.last_match(1) if line =~ /carrier\s*(\d+)/i
  out[:rssi]    = ::Regexp.last_match(1) if line =~ /RSSI[:=]?\s*(-?\d+)/i
  out[:role]    = ::Regexp.last_match(1) if line =~ /\b(FP|PP)\b/
  out[:summary] = "DECT RFPI=#{out[:rfpi]} slot=#{out[:slot]} carrier=#{out[:carrier]}"
  out.compact
end