AF_INET：IPV4
AF_INET6：IPV6
套接字类型：
SOCK_STREAM：TCP
SOCK_DGRAM：UDP
创建TCP套接字，也可以不传递参数，默认创建TCP套接字
tcpSocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
下面是基于python3实现的简单的TCP服务端和客户端
TCP使用send、recv发送和接收数据
服务端：
1 import socket 2 3 HOST = "127.0.0.1" 4 PORT = 9999 5 BUFFSIZE = 1024 6 ADDR = (HOST, PORT) 7 8 tcpSocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM) 9 10 tcpSocket.bind(ADDR)11 12 tcpSocket.listen(5)13 14 while True:15 print("watting clien connection...")16 tcpClienSock, addr = tcpSocket.accept()17 print("connected from:", addr)18 while True:19 data = tcpClienSock.recv(BUFFSIZE)20 if not data:21 break22 print("i have received data: ", data)23 sendData = "hello, i have received your date: %s" % data24 tcpClienSock.send(bytes(sendData, encoding="utf-8"))25 tcpClienSock.close()26 tcpSocket.close() 客户端：
1 import socket 2 3 HOST = "127.0.0.1" 4 PORT = 9999 5 BUFFSIZE = 1024 6 ADDR = (HOST, PORT) 7 8 tcpClientSock = socket.socket() 9 r = tcpClientSock.connect(ADDR)10 print(r)11 12 while True:13 data = input(">>")14 if data == "q" or data == "quit":15 break16 tcpClientSock.send(bytes(data, encoding="utf-8"))17 recvData = tcpClientSock.recv(BUFFSIZE)18 if not recvData:19 break20 print(recvData)21 tcpClientSock.close()
接下来是简单的UDP服务器和客户端实现
UDP使用sendto、recvfrom发送和接收数据
UDP服务器：
1 import socket 2 3 HOST = "127.0.0.1" 4 PORT = 9999 5 BUFFSIZE = 1024 6 ADDR = (HOST, PORT) 7 #UDP服务器创建套接字后，只需要绑定上IP和端口号，等待接收数据即可 8 #不需要listen和accept 9 udpSocket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)10 udpSocket.bind(ADDR)11 12 while True:13 print("watting message...")14 data, addr = udpSocket.recvfrom(BUFFSIZE) #会返回发送者地址15 sendData = "hello, i have recv your date: %s" % data16 udpSocket.sendto(bytes(sendData, encoding="utf-8"), addr)17 print("receive message %s from %s" % (data, addr))18 udpSocket.close()
UDP客户端：
1 import socket 2 3 HOST = "127.0.0.1" # 'localhost'也可以 4 PORT = 9999 5 BUFFSIZE = 1024 6 ADDR = (HOST, PORT) 7 #创建套接字即可发送数据，不需要connect连接 8 udpClientSock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) 9 10 while True:11 data = input(">>")12 if data == "q" or data == "quit":13 break14 udpClientSock.sendto(bytes(data, encoding="utf-8"), ADDR)15 recvData, addr = udpClientSock.recvfrom(BUFFSIZE)16 if not recvData:17 break18 print(recvData)19 udpClientSock.close()