1 #!/usr/bin/python

2 #

3 #

4

5 #

6 #

7 # (C) Roger Gammans <rgammans@computer-surgery.co.uk>

8 # Licensed under the GPLv2 or by arrangement.

9 #

10

11 from socket import *

12 import string

13 import time

14

15 dst_port = 64515

16 src_port = 64513

17 localhost="localhost"

18 broadcast = "255.255.255.255"

19

20 datastr = "000200000000000000000000000100000c07d2f20000000000000000000000000000000000000000"

21 datastr = "00000000000000000000000000010000000000000000000000000000000000000000000000000000"

22

23 import sys

24

25 debug = False

26 if len(sys.argv) > 1 and sys.argv[1] == "--debug": debug=True

27

28

29 def cstring(data,offset=0):

30 retval = ""

31 for i in data[offset:]:

32 if i != '\0':

33 retval += i

34 else: break

35 return retval

36

37 def ipaddress(addrblk):

38 return str(ord(addrblk[0]))+"."+ str(ord(addrblk[1]))+"."+str(ord(addrblk[2]))+"."+ str(ord(addrblk[3]))

39

40 def hexbytes(bytes):

41 return ":".join(map(lambda x : "%02x" % (ord(x)) , bytes))

42

43

44 def do_field(label,data,pos,formatter):

45 print label,"\t",

46 if len(label) < 8: print "\t",

47 print ": ",

48 npos = pos + ord(retdata[pos])

49 print formatter(data[pos+1:npos])

50 return npos

51

52 last=""

53 data=""

54 for i in datastr:

55 if last == "":

56 last =i

57 else:

58 data += chr(int(last+i,16))

59 last = ""

60

61 #print len(data)

62

63 UDPSock = socket(AF_INET,SOCK_DGRAM)

64

65 UDPSock.setsockopt(SOL_SOCKET,SO_BROADCAST,1)

66 UDPSock.bind(('',src_port))

67 UDPSock.sendto(data,(broadcast,dst_port))

68

69 print "type ^C to exit "

70

71 while True:

72 retdata = UDPSock.recv(255)

73

74 print "------------------------------------------"

75 if debug: print len(retdata),repr(retdata)

76 #

77 # These fields have been found by trial and

78 # error so they are likely to be wrong.

79 #

80 print "MAC data\t: ", hexbytes(retdata[4:10])

81 #Unknwon Data in area retdata[11:43]

82 # But it seems to be a repeat of the sent data

83

84 #The first field is a complete guess though

85 ver = ord(retdata[41])+256*ord(retdata[42])

86 print "Packet ver\t: ",ver

87 if ver != 1:

88 print "\t\tFirst field (Possibly version) varies - results may be unreliable"

89

90 pos = do_field("Model",retdata,43,cstring)

91 pos = do_field("Location",retdata,pos,cstring)

92 pos = do_field("Sys name",retdata,pos,cstring)

93 pos = do_field("Ip Address",retdata,pos,ipaddress)

94 pos = do_field("Subnet Mask",retdata,pos,ipaddress)

95 pos = do_field("Default Gw",retdata,pos,ipaddress)

96 pos = do_field("Unknown data",retdata,pos,repr)

97 pos = do_field("Firmware",retdata,pos,cstring)

98

99 print "------------------------------------------"