python socket 廣播

python socket udp廣播

import socket 
import time

def get_host_ip():
    """返回本機IP地址"""
    try:
        ss = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
        ss.connect(('8.8.8.8', 8070))
        ip = ss.getsockname()[0]
    finally:
        ss.close()
    return ip

HOST = '<broadcast>'  
PORT = 9090  
BUFSIZE = 1024  
    
ADDR = (HOST, PORT)  
udpCliSock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)  
#沒有bind也能發
udpCliSock.bind(('', 0))  
udpCliSock.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)  
count=10
while count>=0:  
    count-=1
    data='SSTOP&tuling' 
    udpCliSock.sendto(data,ADDR) 
    print "sending -> %s"%data 
    #如果發往同一局域網安卓端，安卓接收udp廣播時可能有問題，但是可以定向udp發給安卓，一般安卓可以廣播。過程有些繞，但是應該能用
    #安卓廣播自己的IP地址，pc收到安卓地址后定向發udp給安卓

    #andriod_ip='192.168.0.99'#省略接收udp過程
    #udpCliSock.sendto(data,(andriod_ip,PORT))
    time.sleep(1)
udpCliSock.close() 
exit(0)

 

 Python socket 監聽udp廣播

import socket
import time
#初始化udp
s=socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
s.setsockopt(socket.SOL_SOCKET,socket.SO_BROADCAST,1)

#設置端口可以復用
s.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)
s.bind(('',udpPort))

count=10
while count>=0:
    count-=1
    data,addr=s.recvfrom(1024)
    time.sleep(1)
s.close()
exit(0)