Module: PWN::SDR::Decoder::Pager

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

Overview

Combined pager decoder for the mixed-protocol pager_all band plan.

Runs multimon-ng with FLEX + FLEX_NEXT + POCSAG512/1200/2400 enabled simultaneously and dispatches each output line to the appropriate per-protocol parser (::Flex-style or ::POCSAG.parse_line).

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/pager.rb', line 57

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



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# File 'lib/pwn/sdr/decoder/pager.rb', line 17

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

  decode_cmd = 'multimon-ng -q -t raw -e -u -p ' \
               '-a FLEX -a FLEX_NEXT ' \
               '-a POCSAG512 -a POCSAG1200 -a POCSAG2400 -'

  PWN::SDR::Decoder::Base.run_pipeline(
    freq_obj: freq_obj,
    protocol: 'PAGER',
    required_bins: %w[sox multimon-ng],
    decode_cmd: decode_cmd,
    line_match: /^(FLEX|POCSAG)/,
    parser: proc { |line| parse_line(line: line) }
  )
end

.help ⇒ Object

Display Usage for this Module



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# File 'lib/pwn/sdr/decoder/pager.rb', line 63

public_class_method def self.help
  puts "USAGE:
    #{self}.decode(
      freq_obj: 'required - freq_obj returned from PWN::SDR::GQRX.init_freq'
    )

    #{self}.parse_line(line: 'FLEX|3200|...|ALN|MESSAGE')

    #{self}.authors
  "
end

.parse_line(opts = {}) ⇒ Object

Supported Method Parameters

PWN::SDR::Decoder::Pager.parse_line(line: 'FLEX|... or POCSAG1200: ...')



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# File 'lib/pwn/sdr/decoder/pager.rb', line 37

public_class_method def self.parse_line(opts = {})
  line = opts[:line].to_s
  return PWN::SDR::Decoder::POCSAG.parse_line(line: line) if line.start_with?('POCSAG')

  # FLEX / FLEX_NEXT — pipe- or space-delimited (see ::Flex for format).
  delim  = line.start_with?('FLEX: ') ? ' ' : '|'
  parts  = line.split(delim)
  proto  = line.start_with?('FLEX_NEXT') ? 'FLEX_NEXT' : 'FLEX'
  types  = %w[ALN BIN HEX NUM TON TONE UNK]
  t_idx  = parts.index { |p| types.include?(p) }
  out    = { protocol: proto, raw_inspected: line.inspect }
  out[:capcode]      = parts.find { |p| p.match?(/^\[?\d{7,10}\]?$/) }
  out[:type]         = t_idx ? parts[t_idx] : nil
  out[:type_payload] = t_idx ? parts[(t_idx + 1)..].join(delim) : nil
  out[:summary]      = "#{proto} RIC=#{out[:capcode]} #{out[:type]}: #{out[:type_payload]}"
  out.compact
end