Socket 服务器显示错误的 IP

Question

我正在使用套接字制作一个聊天应用程序，但遇到了一个小问题。我在笔记本电脑上运行服务器，然后从同一笔记本电脑上的虚拟机内运行的客户端连接到服务器。

chat_server.py

import socket
import subprocess
import platform
from _thread import *

def get_local_ip():
    system_platform = platform.system().lower()

    try:
        if system_platform == 'darwin':
            # macOS
            result = subprocess.run(["ifconfig", "en0"], capture_output=True, text=True, check=True)
            local_ip = [line.split()[1] for line in result.stdout.splitlines() if "inet " in line][0]
        elif system_platform == 'linux':
            # Linux
            result = subprocess.run(["ifconfig"], capture_output=True, text=True, check=True)
            # Find the first non-loopback IPv4 address
            local_ip = next((line.split()[1] for line in result.stdout.splitlines() if "inet " in line and "127.0.0.1" not in line), None)
        elif system_platform == 'windows':
            # Windows
            result = subprocess.run(["ipconfig"], capture_output=True, text=True, check=True)
            local_ip = [line.split(":")[1].strip() for line in result.stdout.splitlines() if "IPv4 Address" in line][0]
        else:
            print("Unsupported operating system")
            return None

        if local_ip is None:
            raise Exception("Failed to retrieve a valid local IP address.")

        return local_ip
    except subprocess.CalledProcessError as e:
        print(f"Error running command: {e}")
        return None
    except Exception as e:
        print(f"Error getting local IP: {e}")
        return None


def start_server():
    host_ip = get_local_ip()
    port_number = int(input("Enter the port number: "))

    server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)

    server_socket.bind((host_ip, port_number))
    server_socket.listen(100)
    print(f"{host_ip} listening on port {port_number}")
    client_list = []

    def handle_client(client_conn, client_address):
        client_conn.send("Connection successful. You can now start chatting!".encode('utf-8'))

        while True:
            try:
                message = client_conn.recv(2048)
                if message:
                    print(f"{client_address[0]}: {message.decode('utf-8')}")
                    broadcast_message = f"{message.decode('utf-8')}"
                    broadcast(broadcast_message, client_conn)
                else:
                    remove_client(client_conn)
            except:
                continue

    def broadcast(message, sender_connection):
        for client_socket in client_list:
            if client_socket != sender_connection:
                try:
                    client_socket.send(message.encode('utf-8'))
                except:
                    client_socket.close()
                    remove_client(client_socket)

    def remove_client(client_connection):
        if client_connection in client_list:
            client_list.remove(client_connection)

    while True:
        client_conn, client_addr = server_socket.accept()
        client_list.append(client_conn)
        print(f"{client_addr[0]} connected")
        start_new_thread(handle_client, (client_conn, client_addr))

    client_conn.close()
    server_socket.close()

if __name__ == "__main__":
    start_server()

chat_client.py

import socket
import select
import sys

def start_client():
    server_ip = input("Enter the server IP address: ")
    server_port = int(input("Enter the server port: "))

    client_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

    client_socket.connect((server_ip, server_port))

    username = input("Enter your username: ")

    while True:
        active_sockets = [sys.stdin, client_socket]

        readable_sockets, _, _ = select.select(active_sockets, [], [])

        for current_socket in readable_sockets:
            if current_socket == client_socket:
                message = current_socket.recv(2048).decode('utf-8')
                print(message)
            else:
                message = sys.stdin.readline()
                client_socket.send(f"{username}: {message}".encode('utf-8'))

    client_socket.close()

if __name__ == "__main__":
    start_client()

每当客户端连接到服务器时，服务器应该显示已连接的客户端的IP，但它一直显示服务器的IP。

示例 输入端口号：5000 10.180.186.206 监听端口 5000 10.180.186.206 已连接

我在虚拟机上运行 ifconfig 来获取其 IP，就我而言，当客户端连接时服务器应该显示此信息：

输入端口号：5000 10.180.186.206 监听端口 5000 10.211.55.7 已连接

如何让显示已连接客户端的IP地址而不是服务器IP。

Answer 1

套接字由三部分组成:

IP地址 传输协议 端口号 端口是介于 1 和 65535 之间的数字，表示设备中的逻辑门。客户端和服务器之间的每个连接都需要一个唯一套接字。

例如：

1030 是端口。 （190.10.10.2，TCP，端口1530）是一个套接字。