python 端口转发

要在Python中实现端口转发，可以使用socket模块来完成。下面是一个示例代码：

import socket

def forward(source_host, source_port, target_host, target_port):
    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as source_socket:
        source_socket.bind((source_host, source_port))
        source_socket.listen(1)
        print(f'Listening on {source_host}:{source_port}')
        
        while True:
            client_socket, client_address = source_socket.accept()
            print(f'Accepted connection from {client_address}')
            
            with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as target_socket:
                target_socket.connect((target_host, target_port))
                print(f'Connected to target {target_host}:{target_port}')
                
                while True:
                    data = client_socket.recv(1024)
                    if not data:
                        break
                    target_socket.sendall(data)
                    print(f'Sent {len(data)} bytes to target')
                    
            client_socket.close()
            print(f'Closed connection from {client_address}')

这个函数接受四个参数：源主机、源端口、目标主机和目标端口。它使用socket模块创建一个监听套接字，并在循环中接受来自客户端的连接。一旦有连接，它将创建一个与目标主机和端口的套接字连接，并在循环中将来自客户端的数据转发到目标套接字。如果客户端关闭连接或发生错误，它将关闭连接并重新开始监听。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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