[网络协议]TCP和UDP的socket通信

TCP和UDP的socket通信

Python版本：3.9.6

ide：PyCharm 2021.1.3

????????前几天项目上在测试udp和tcp数据的转发，需要验证转发后的数据格式，写了demo检查数据，简单实现了客户端和服务端，如下：

TCP服务端：

# TCP服务端

import socket


address = ('', 10016)
# 创建套接字：socket.AF_INET-IPv4套接字类型;socket.SOCK_STREAM-数据流,TCP
server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
# 防止重启后端口被占用
server.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
# 绑定的IP与端口
server.bind(address)
# 监听一个请求
server.listen(1)
print('waiting for connection...')
conn, addr = server.accept()
print('connected by', addr, '...')
while True:
    data = input('input your message:')
    conn.send(data.encode('gbk'))

conn.close()

TCP客户端：

# TCP客户端
import socket


address = ('192.168.121.206', 10016)
# 创建套接字：socket.AF_INET-IPv4套接字类型;socket.SOCK_STREAM-数据流,TCP
client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

print('try to connect to', address, '...')

while True:
    try:
        client.connect(address)
    except socket.error as msg:
        print(msg, 'retry...')
    else:
        print('connected to', address, '...')
        break

while True:
    data = client.recv(1024)
    if data:
        print('the received message is:', data.decode('gbk'))

client.close()

UDP服务端：

# UDP服务端

import socket


address = ('192.168.121.206', 10015)
# 创建套接字：socket.AF_INET-IPv4套接字类型;socket.SOCK_DGRAM-数据包,UDP
server = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
while True:
    data = input('input your message:')
    # 对方的IP和Port
    server.sendto(data.encode('gbk'), address)
# 退出套接字
server.close()

UDP客户端：

# UDP客户端

import socket


# 本地IP和Port
address = ('', 10015)
# 创建套接字：socket.AF_INET-IPv4套接字类型;socket.SOCK_DGRAM-数据包,UDP
client = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
# 防止重启后端口被占用
client.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
client.bind(address)

while True:
    data, addr = client.recvfrom(1024)
    if not data:
        print("data null...")
    else:
        print('received:', data.decode("gbk"), 'from', addr)
# 退出套接字
client.close()