Python socket.error: [Errno 13] 权限被拒绝 [英] Python socket.error: [Errno 13] Permission denied

问题描述

使用 Linux 和 Python，我想通过广播发送一些数据:

Using Linux and Python, I want to send some data with broadcast:

d = b'109u433279423423423'    

import socket

s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

s.sendto(d, 0, ('192.168.0.255', 9))

我在 root 下启动这个脚本并得到这个错误:

I launch this script under root and get this error:

s.sendto(d, 0, ('192.168.0.255', 9)) socket.error: [Errno 13]
Permission denied

怎么了?

推荐答案

您正在尝试发送到广播地址.这是不允许的，请参阅 sendto(2) 的手册页:

You are trying to send to a broadcast address. It is not allowed, see manpage for sendto(2):

EACCES(对于 UDP 套接字)尝试发送到网络/广播地址，就好像它是单播地址一样.

EACCES (For UDP sockets) An attempt was made to send to a network/broadcast address as though it was a unicast address.

设置 SO_BROADCAST 选项，如果您实际上是要发送到广播地址:

Set the SO_BROADCAST option, if you actually mean to send to a broadcast address:

s.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)

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