Module: PWN::SDR::Decoder::Iridium

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

Overview

True-air + detector-fallback decoder for Iridium. 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/iridium.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::Iridium.decode( freq_obj: 'required - freq_obj returned from PWN::SDR::GQRX.init_freq' )



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# File 'lib/pwn/sdr/decoder/iridium.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 = 'IRIDIUM'
  demod = DemodIQ.new(
    rate: rate, protocol: proto, modulation: 'DE-QPSK',
    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: '25 kbit/s DE-QPSK — true-air I/Q path reports burst timing/energy.',
    describe: proc { |b| { modulation: 'DE-QPSK', symbol_rate: 25_000, classification: b[:duration_ms] < 10 ? 'simplex-burst' : 'duplex-frame' } }
  )
end

.help ⇒ Object 



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

public_class_method def self.parse_line(opts = {})
  line = opts[:line].to_s
  out  = { protocol: 'IRIDIUM' }
  out[:frame_type] = ::Regexp.last_match(1) if line =~ /^([A-Z]{3}):/
  out[:sat]        = ::Regexp.last_match(1) if line =~ /sat:(\d+)/
  out[:beam]       = ::Regexp.last_match(1) if line =~ /beam:(\d+)/
  out[:pos]        = ::Regexp.last_match(1) if line =~ /pos=\(([^)]+)\)/
  out[:ra_id]      = ::Regexp.last_match(1) if line =~ /ric:(\d+)/
  out[:summary]    = "IRIDIUM #{out[:frame_type]} sat=#{out[:sat]} beam=#{out[:beam]}"
  out.compact
end