Class: PacketViaDMEM

Inherits:
Object
  • Object
show all
Defined in:
lib/packet_via_dmem.rb,
lib/packet_via_dmem/cli.rb,
lib/packet_via_dmem/sent.rb,
lib/packet_via_dmem/packet.rb,
lib/packet_via_dmem/packets.rb,
lib/packet_via_dmem/received.rb,
lib/packet_via_dmem/header/sent.rb,
lib/packet_via_dmem/header/received.rb

Defined Under Namespace

Classes: CLI, Error, Header, Packet, Packets, Received, Sent

Constant Summary collapse

PACKET = 
/^(Received|Sent) \d+ byte parcel:.*\n/
FAKE = 
{
  :dmac  => %w( 22 22 22 22 22 22 ),
  :smac  => %w( 66 66 66 66 66 66 ),
  :etype_mpls  => %w( 88 47 ),
  :etype_ipv4  => %w( 08 00 ),
  :ipv4        => %w( 45 ),
}
HEADER_SIZE = 
{
  :received => 6,
  :sent     => 13,
}

Instance Method Summary collapse

Constructor Details

#initialize(opts = {}) ⇒ PacketViaDMEM 



19
20
21
22
23
24
25
26
27
28
29
 
# File 'lib/packet_via_dmem.rb', line 19

def initialize opts={}
  @received   = opts.delete :received
  @sent       = opts.delete :sent
  @log        = opts.delete :log
  if not @log
    @log = Logger.new STDERR
    @log.level = Logger::FATAL
  end
  @received ||= HEADER_SIZE[:received]
  @sc         = StringScanner.new ''
end

Instance Method Details

#parse(str) ⇒ Object 



45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
 
# File 'lib/packet_via_dmem.rb', line 45

def parse str
  packets = Packets.new @log
  @sc.string = str
  while @sc.scan_until PACKET
    match = @sc.matched.split(/\s+/)
    type = match.first.downcase.to_sym
    @sc.scan_until(/\n/) if type == :received
    pkt = ''
    while @sc.match?(/^0x/)
      pkt << (@sc.scan_until(/\n/) || @sc.scan_until(/$/)).strip
    end
    pkt = parse_packet pkt
    packets.add pkt, type
  end
  @sc.string = ''
  packets
end

#stream(io) ⇒ Object 



31
32
33
34
35
36
37
38
39
40
41
42
43
 
# File 'lib/packet_via_dmem.rb', line 31

def stream io
  packet = ''
  while not io.eof?
    line = io.readline
    if line.match PACKET
      packet = parse(packet).first
      yield packet if packet
      packet = line
    else
      packet << line
    end
  end
end