[网络协议]《python黑帽子 黑客与渗透测试编程之道》第二章-网络基础 tcp、udp客户端、服务端

TCP客户端、服务端

代码

# -- coding: utf-8

# 开始一直报错，发现是文件夹命名中文的问题
import socket

target_host = "127.0.0.1"
target_port = 9999

# 建立一个socket对象
client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
# 连接客户端
client.connect((target_host, target_port))
# 发送数据
client.send("GET / HTTP/1.1\r\nHost: baidu.com\r\n\r\n")
# 接收数据
response = client.recv(4096)
print response

利用NetAssist 模拟客户端发送接收回复的过程。

1.打开NetAssist，设置为TCP Server，点击打开

2.客户端设置好ip端口，运行，发送消息

接收消息成功

3.服务端回复消息，客户端接收成功。

TCP服务端

代码

#!/usr/bin/env python
# -*- coding:utf-8 -*-
# Autor:tangzicheng
import socket
import threading

bind_ip = "0.0.0.0"
bind_port = 9999

server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server.bind((bind_ip, bind_port))
server.listen(5)
print "[*] Listening on %s:%d" % (bind_ip, bind_port)

# 客户处理线程
def handle_client(client_socket):
    # 打印出客户端发送得到内容
    request = client_socket.recv(1024)
    print "[*] Received: %s" % request
    # 返回一个数据包
    client_socket.send("ACK!")
    client_socket.close()

while True:
    client, addr = server.accept()
    print "[*] Accepted connection from: %s:%d" % (addr[0],addr[1])

    # 挂起客户端线程，处理传入的数据
    client_handler = threading.Thread(target=handle_client, args=(client,))
    client_handler.start()

UDP客户端、服务端

客户端代码

#!/usr/bin/env python
# -*- coding:utf-8 -*-
# Autor:tangzicheng
import socket

target_host = "127.0.0.1"
target_port = 80

# 建立一个socket对象
client = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
# 发送数据
client.sendto("AABBBCCC",(target_host, target_port))
# 接收数据
data, addr = client.recvfrom(4096)
print data

服务端代码

#!/usr/bin/env python
# -*- coding:utf-8 -*-
# Autor:tangzicheng
import socket

# 监听任意地址
target_host = ""
target_port = 8888

udp_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
udp_socket.bind((target_host, target_port))

while True:
    recv_data = udp_socket.recvfrom(1024)
    print "[%s]:%s" % (str(recv_data[1]),recv_data[0].decode("gb2312"))

测试，python服务端，NetAssist作客户端或者自己编写的python代码作客户端

参考链接：

https://zhuanlan.zhihu.com/p/29598584