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

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

Overview

Pure-Ruby LTE / UMTS / CDMA cellular activity detector.

1.4–20 MHz OFDMA/WCDMA is far beyond a 48 kHz audio tap and beyond interpreted Ruby's real-time I/Q throughput. Native mode reports channel occupancy / power only. parse_line retained for offline cell_search / CellSearch text analysis.

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 47

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 18

public_class_method def self.decode(opts = {})
  freq_obj = opts[:freq_obj]
  PWN::SDR::Decoder::Base.run_detector(
    freq_obj: freq_obj,
    protocol: 'LTE',
    note: 'OFDMA (1.4–20 MHz, 15 kHz subcarriers) — native mode reports channel occupancy only.',
    threshold: 4.0,
    describe: proc { |_b| { modulation: 'OFDMA', subcarrier_khz: 15 } }
  )
end

.help ⇒ Object

Display Usage for this Module



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# File 'lib/pwn/sdr/decoder/lte.rb', line 53

public_class_method def self.help
  puts "USAGE (ruby-native detector, no external binaries):
    #{self}.decode(
      freq_obj: 'required - freq_obj returned from PWN::SDR::GQRX.init_freq'
    )

    #{self}.parse_line(line: 'Found CELL 739.0 MHz, EARFCN=5110, PCI=123, 50 PRB, -85.2 dBm')

    #{self}.authors
  "
end

.parse_line(opts = {}) ⇒ Object

Supported Method Parameters

PWN::SDR::Decoder::LTE.parse_line(line: 'Found CELL ... PCI: 123 ...')



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# File 'lib/pwn/sdr/decoder/lte.rb', line 32

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