Ganglia XDR packet parser

parser.py

from socket import *
from xdrlib import Packer, Unpacker

# Set the socket parameters
host = "localhost"
port = 1234
buf = 1024
addr = (host,port)

slope_str2int = {'zero':0,
                 'positive':1,
                 'negative':2,
                 'both':3,
                 'unspecified':4}

# could be autogenerated from previous but whatever
slope_int2str = {0: 'zero',
                 1: 'positive',
                 2: 'negative',
                 3: 'both',
                 4: 'unspecified'}


def gmetric_read(msg):
    unpacker = Unpacker(msg)
    values = dict()
    type = unpacker.unpack_int()
    
    if type == 128:
        print "Processing Meta Data packet"
        values['HOSTNAME'] = unpacker.unpack_string()
        values['NAME'] = unpacker.unpack_string()
        values['SPOOF'] = unpacker.unpack_uint()
        values['TYPE'] = unpacker.unpack_string()
        values['NAME'] = unpacker.unpack_string()
        values['UNITS'] = unpacker.unpack_string()
        values['SLOPE'] = slope_int2str[unpacker.unpack_int()]
        values['TMAX'] = unpacker.unpack_uint()
        values['DMAX'] = unpacker.unpack_uint()
        values['GROUP_INCLUDED'] = unpacker.unpack_uint()
        
    if type == 133:        
        print "Processing Metric packet"
        values['HOSTNAME'] = unpacker.unpack_string()
        values['NAME'] = unpacker.unpack_string()
        values['SPOOF'] = unpacker.unpack_uint()    
        values['PRINTF'] = unpacker.unpack_string()
        values['VAL'] = unpacker.unpack_string()

    print values
    unpacker.done()
    return values

# Create socket and bind to address
UDPSock = socket(AF_INET,SOCK_DGRAM)
UDPSock.bind(addr)

# Receive messages
while 1:
  data,addr = UDPSock.recvfrom(buf)
  if not data:
    break
  else:
    gmetric_read(data)

# Close socket
UDPSock.close()

great work; be aware that values['VAL'] = unpacker.unpack_string() will need to change depending on the type of the submitted packet.
This could become unpack_float, unpack_int, etc ...

Yeah also need to figure out how to parse extra data. Unpacker doesn't like extra unpacked data-- Sent from my phoneOn Nov 19, 2011 1:57, Patrick Debois reply@reply.github.com wrote: great work; be aware that values['VAL'] = unpacker.unpack_string() will need to change depending on the type of the submitted packet. ## This could become unpack_float, unpack_int, etc ... Reply to this email directly or view it on GitHub: https://gist.github.com/1377993