尝试连接套接字时出现错误 10051 [英] Error 10051 while trying to connect socket

问题描述

我最近在 linux 中构建了一个套接字服务器聊天.

I recently built a socket-server chat in linux.

当我尝试连接我的 windows 8.1 主计算机(都在同一子网下)时，我得到:

When I try to connect my windows 8.1 main computer (Both under the same subnet), i get an:

[Errno 10051]: A socket operation was attempted to an unreachable network

代码:

import socket
import datetime 
import getpass          # Get username
import sys
import thread
import select

def client():

sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
sock.bind(("127.0.0.1", 8856))
sock.connect(("192.168.1.17", 23657))
sock.send(getpass.getuser()+"[$ID$]4sthg")

socket_list = [sys.stdin, sock]
partner = raw_input("Chat partner: ")

while 1:
    # Get the list sockets which are readable
    read_sockets, write_sockets, error_sockets =       select.select(socket_list , [], [])
    for sock_index in read_sockets:
        # incoming message from remote server
        if sock_index == sock:
            data = sock_index.recv(4096)
            if not data :
                print '\nDisconnected from chat server'
                sys.exit()
            else :
                #print data
                sys.stdout.write(data)
        # user entered a message
        else:
            msg = sys.stdin.readline()
            sock.send(partner + "|" + msg)

def get_time():
    return datetime.datetime.strftime(datetime.datetime.now(), '%H:%M:%S')

def main():
    client()

if __name__ == "__main__":
    main()

我尝试ping"到我的笔记本电脑地址，效果很好.还在我的 linux 防火墙中添加了一条规则，声明允许来自我的 Windows 计算机的每个数据包.

I tried "ping" to my laptop address, and it worked well. also added a rule in my linux firewall, declares that every packet comes from my windows computer is allowed.

知道为什么会这样吗?

谢谢！

推荐答案

行:

sock.bind(("127.0.0.1", 8856))

是错误的 - 您绑定到 loopback 虚拟接口，因此只允许本地(同一台机器)对等方与您交谈.

is wrong - you are binding to the loopback virtual interface, thus only allowing local (same machine) peers to talk to you.

实际上，当你连接出来时，即作为一个普通的 TCP 客户端，你根本不应该绑定套接字的本地端.内核 TCP/IP 堆栈将为套接字分配一个临时端口，路由表将规定用于传出连接的网络接口.

In fact, when you connect out, i.e. act as a normal TCP client, you should not bind the local end of the socket at all . Kernel TCP/IP stack will assign an ephemeral port to the socket, and the routing table will dictate what network interface to use for outgoing connection.

同样，SO_REUSEADDR 选项仅用于侦听服务器:

On the same note, the SO_REUSEADDR option is only needed for listening servers:

sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)

删除这两行并重试.

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