netdev - Re: EACCES sending UDP to broadcast address?

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Message-ID: <1428628362.25985.284.camel@edumazet-glaptop2.roam.corp.google.com>
Date:	Thu, 09 Apr 2015 18:12:42 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Ben Greear <greearb@...delatech.com>
Cc:	netdev <netdev@...r.kernel.org>
Subject: Re: EACCES sending UDP to broadcast address?

On Thu, 2015-04-09 at 18:04 -0700, Ben Greear wrote:
> I'm running as root user, 4.0-rc6 + hack kernel.
> 
> User-space app is (or should be) trying to send a UDP frame
> to 255.255.255.255 destination.
> 
> I am getting EACCESS from sendmmsg.
> 
> Is this expected?  Is there something even more special than root these
> days?

man 7 socket

       SO_BROADCAST
              Set  or  get  the  broadcast flag.  When enabled, datagram
sockets are allowed to send packets to a broadcast address.  This option
has no effect on stream-oriented
              sockets.

root user still has to use this option.

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