これは、受信データを出力するPythonスクリプトです。
# Multicast client
# Adapted from: http://chaos.weblogs.us/archives/164
import socket
ANY = "0.0.0.0"
MCAST_ADDR = "224.0.0.7"
MCAST_PORT = 7000
# Create a UDP socket
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
# Allow multiple sockets to use the same PORT number
sock.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)
# Bind to the port that we know will receive multicast data
sock.bind((ANY,MCAST_PORT))
# Tell the kernel that we want to add ourselves to a multicast group
# The address for the multicast group is the third param
status = sock.setsockopt(socket.IPPROTO_IP,
socket.IP_ADD_MEMBERSHIP,
socket.inet_aton(MCAST_ADDR) + socket.inet_aton(ANY))
# setblocking(0) is equiv to settimeout(0.0) which means we poll the socket.
# But this will raise an error if recv() or send() can't immediately find or send data.
sock.setblocking(0)
while 1:
try:
data, addr = sock.recvfrom(1024)
except socket.error as e:
pass
else:
print "From: ", addr
print "Data: ", data