socket实验—udp超时设置

服务端程序,手动设置了丢包：

from socket import *
import random

serverport = 12000
serverSocket = socket(AF_INET, SOCK_DGRAM)
serverSocket.bind(('', serverport))
while(True) :
 rand = random.randint(0, 10)
 message, address = serverSocket.recvfrom(2048)
 modifiedMessage = message.upper()
 if rand < 4: ;小于4的话故意丢包
    continue
 serverSocket.sendto(modifiedMessage, address)

客户端程序,发送十次ping,未丢包打印往返时间，丢包输出lost packaage：

from socket import *
import time
servername = '192.168.0.103'
serverport = 12000
#创建udp套接字
udpClientSocket = socket(AF_INET,SOCK_DGRAM)
sendmessage = "Ping"
udpClientSocket.settimeout(1)
for i in range(10):
    sendtime = time.time()
    try :
     udpClientSocket.sendto(sendmessage.encode(),(servername,serverport))
     serverMessage,serverAddress = udpClientSocket.recvfrom(2048)
     RTT = time.time() - sendtime
     print (RTT)
    except :
     print("lost package")
udpClientSocket.close()

实验结果,十次中丢包6次：