| 54 | | |
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| | 54 | |
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| | 55 | # Dissector for ARP |
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| | 56 | class ARP<Layer |
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| | 57 | Scruby.register_dissector(self) |
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| | 58 | def method_missing(method, *args) |
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| | 59 | return Scruby.field(method, *args) |
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| | 60 | end |
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| | 61 | |
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| | 62 | attr_accessor :hw_type, :ptype, :hwlen, :plen, :op, :hwsrc, :psrc, :pdst, :hwdst, :pdst |
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| | 63 | |
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| | 64 | @@request = {"who-has"=>1, "is-at"=>2, "RARP-req"=>3, "RARP-rep"=>4, |
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| | 65 | "Dyn-RARP-req"=>5, "Dyn-RAR-rep"=>6, "Dyn-RARP-err"=>7, |
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| | 66 | "InARP-req"=>8, "InARP-rep"=>9} |
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| | 67 | |
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| | 68 | def init |
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| | 69 | @protocol = 'ARP' |
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| | 70 | @fields_desc = [ XShortField("hwtype", 0x0001), |
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| | 71 | XShortEnumField("ptype", ETHERTYPE_IPv4, ETHERTYPE_ALL), |
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| | 72 | ByteField("hwlen", 6), |
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| | 73 | ByteField("plen", 4), |
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| | 74 | ShortField("op", @@request["who-has"]), |
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| | 75 | MACField("hwsrc", '00:00:00:00:00:00'), |
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| | 76 | IPField("psrc", '127.0.0.1'), |
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| | 77 | MACField("hwdst", '00:00:00:00:00:00'), |
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| | 78 | IPField("pdst", '127.0.0.1') ] |
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| | 79 | end |
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| | 80 | |
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| | 81 | def pre_send(underlayer, payload) |
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| | 82 | if underlayer.is_a?(Ether) |
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| | 83 | underlayer.type = ETHERTYPE_ARP |
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| | 84 | end |
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| | 85 | end |
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| | 86 | end |
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| | 87 | |
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| | 88 | |
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