使用PYTHON接收多播数据的代码

首先声明，这不是我写的，而是我找到的，但是别人写的相当好。

# udp multicast examples, hugo vincent, 2005-05-14.
import socket

def send(data, port=50000, addr='239.192.1.100'):
"""send(data[, port[, addr]]) - multicasts a udp datagram."""
# create the socket
s = socket.socket(socket.af_inet, socket.sock_dgram)
# make the socket multicast-aware, and set ttl.
s.setsockopt(socket.ipproto_ip, socket.ip_multicast_ttl, 20) # change ttl (=20) to suit
# send the data
s.sendto(data, (addr, port))

def recv(port=50000, addr="239.192.1.100", buf_size=1024):
"""recv([port[, addr[,buf_size]]]) - waits for a datagram and returns the data."""

# create the socket
s = socket.socket(socket.af_inet, socket.sock_dgram)

# set some options to make it multicast-friendly
s.setsockopt(socket.sol_socket, socket.so_reuseaddr, 1)
try:
s.setsockopt(socket.sol_socket, socket.so_reuseport, 1)
except attributeerror:
pass # some systems don't support so_reuseport
s.setsockopt(socket.sol_ip, socket.ip_multicast_ttl, 20)
s.setsockopt(socket.sol_ip, socket.ip_multicast_loop, 1)

# bind to the port
s.bind(('', port))

# set some more multicast options
intf = socket.gethostbyname(socket.gethostname())
s.setsockopt(socket.sol_ip, socket.ip_multicast_if, socket.inet_aton(intf) + socket.inet_aton('0.0.0.0'))
s.setsockopt(socket.sol_ip, socket.ip_add_membership, socket.inet_aton(addr) + socket.inet_aton('0.0.0.0'))

# receive the data, then unregister multicast receive membership, then close the port
data, sender_addr = s.recvfrom(buf_size)
s.setsockopt(socket.sol_ip, socket.ip_drop_membership, socket.inet_aton(addr) + socket.inet_aton('0.0.0.0'))
s.close()
return data

#!/usr/bin/env python
from socket import *from time import sleep,time,ctime
host = '229.0.0.15'port = 9999bufsiz = 1024addr = (host, port)
udpclisock = socket(af_inet, sock_dgram)
data = 't'*200count = 0while(count<100 ): udpclisock.sendto(data, addr) sleep(1) count = count+1
udpclisock.close()