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Multicast scripts...
Multicast scripts git-svn-id: http://jro-dev.igp.gob.pe/svn/jro_hard/radarsys/trunk/webapp@216 aa17d016-51d5-4e8b-934c-7b2bbb1bbe71

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multicast_absmodule.py
55 lines | 1.6 KiB | text/x-python | PythonLexer
"""
This script should run in the absmodule.
"""
import socket
import struct
import sys
multicast_group = '224.3.29.71'
server_address = ('',10000)
mod = ('192.168.1.63', 5500) #This IP should be modificated according to its absmodule
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(mod)
# Create the socket
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
# Bind to the server address
sock.bind(server_address)
#Tell the operating system to add the socket to the multicast group
#on all interfaces.
group = socket.inet_aton(multicast_group)
mreq = struct.pack('4sL', group, socket.INADDR_ANY)
sock.setsockopt(socket.IPPROTO_IP, socket.IP_ADD_MEMBERSHIP, mreq)
#Receive/respond loop
while True:
print >>sys.stderr, '\nwaiting to receive message'
data, address = sock.recvfrom(1024)
if data != '':
message = data
#try:
s.sendto(message,mod)
rx_text = s.recv(1024)
s.close()
s = None
print >>sys.stderr, 'Respond from TCP server: %s' % rx_text
try:
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(mod)
except:
print '\nProblem with creating socket repeater!!...\n'
s.close()
s = None
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(mod)
break
print >>sys.stderr, 'received %s bytes from %s' % (len(data), address)
print >>sys.stderr, data
#print >>sys.stderr, 'sending acknowledgement to', address
#sock.sendto('ack', address)break