python 套接字编程中建立连接后如何获取客户端的IP地址？

Question

我写了一个套接字程序来发送一个文件并从套接字接收一个字符串我在其中指定了客户端（写了客户端的IP地址）我想动态获取那个客户端地址，我尝试了 .getpeername() 函数但出现错误

我尝试了 .getpeername() 函数但出现错误

#host = '10.66.227.181'   # fixed ip of one client only
client_socket = socket.socket()
host = client_socket.getpeername()
print(clientip)
port = 8000
print(host,port)
client_socket.connect(host,port)

客户端提示 = socket.gethostname(client_socket.getpeername()) OSError：[WinError 10057] 不允许发送或接收数据的请求，因为套接字未连接并且（当使用 sendto 调用在数据报套接字上发送时）没有提供地址

Answer 1

如果 UDP 套接字未连接，则没有对等点。所以不可能有对等名称。如果已连接，您已经知道如何连接它了。

client_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
client_socket.connect(host,port)
host, port = client_socket.getpeername()

Answer 2

这是 'Foundations of Python Network Programming' 书中关于 udp 套接字（服务器端和客户端）的示例，我认为这个示例对您有用：

import argparse, socket
from datetime import datetime

MAX_BYTES = 65535

def server(port):
    sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    sock.bind(('127.0.0.1', port))
    print('Listening at {}'.format(sock.getsockname()))
    while True:
        data, address = sock.recvfrom(MAX_BYTES)
        text = data.decode('ascii')
        print('The client at {} says {!r}'.format(address, text))
        text = 'Your data was {} bytes long'.format(len(data))
        data = text.encode('ascii')
        sock.sendto(data, address)

def client(port):
    sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    text = 'The time is {}'.format(datetime.now())
    data = text.encode('ascii')
    sock.sendto(data, ('127.0.0.1', port))
    print('The OS assigned me the address {}'.format(sock.getsockname()))
    data, address = sock.recvfrom(MAX_BYTES)  # Danger! See Chapter 2
    text = data.decode('ascii')
    print('The server {} replied {!r}'.format(address, text))

if __name__ == '__main__':
    choices = {'client': client, 'server': server}
    parser = argparse.ArgumentParser(description='Send and receive UDP locally')
    parser.add_argument('role', choices=choices, help='which role to play')
    parser.add_argument('-p', metavar='PORT', type=int, default=1060,
                        help='UDP port (default 1060)')
    args = parser.parse_args()
    function = choices[args.role]
    function(args.p)

source

Answer 3

由于“主机”术语，上述答案会让大多数人感到困惑，所以这里有一个更好的答案：

ip_address = my_socket.getpeername()[0]

其中 my_socket 是您已经设置和连接的套接字的句柄。

python 套接字编程中建立连接后如何获取客户端的IP地址？

how to get Ip address of client after connection is established in python socket programming?

python

python-3.x

sockets

serversocket

peer