Re: Howto send a limited broadcast?

Bruce M. Simpson wrote:
> tmm wrote:
>> So, can anyone suggest how I can send a limited
broadcast (on an 
>> interface that has been initalized with an IP and a
subnet)?
>
> Use the IP_ONESBCAST option and send to the network
broadcast address 
> for that subnet. The stack will change it into
255.255.255.255 on 
> output. See man page ip(4) for details.
>
> It's a hack, but it's largely due to how the stack has
worked 
> historically.
>
> BMS
Thanks.  I wasn't aware of that option.

But now I find that this option is not present in my (eCos
port of) 
FreeBSD stack.  Either it was removed during the port, or
the ported 
version is too old.

Perhaps the best thing for me to do is to look at the
'normal' FreeBSD 
stack (as opposed to the eCos one) and see how IP_ONESBCAST
is 
implemented.  Then perhaps I could do the same thing in my
FreeBSD stack.

Is there a way for me to download the FreeBSD source code
without 
actually downloading, burning, and installing FreeBSD? 
Looking around 
the FreeBSD website I don't see a source download link.

thanks,
Tom.
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tmm wrote:
>
>
> Bruce M. Simpson wrote:
>> tmm wrote:
>>> So, can anyone suggest how I can send a limited
broadcast (on an 
>>> interface that has been initalized with an IP
and a subnet)?
>>
>> Use the IP_ONESBCAST option and send to the network
broadcast address 
>> for that subnet. The stack will change it into
255.255.255.255 on 
>> output. See man page ip(4) for details.
>>
>> It's a hack, but it's largely due to how the stack
has worked 
>> historically.
>>
>> BMS
> Thanks.  I wasn't aware of that option.
>
> But now I find that this option is not present in my
(eCos port of) 
> FreeBSD stack.  Either it was removed during the port,
or the ported 
> version is too old.
>
> Perhaps the best thing for me to do is to look at the
'normal' FreeBSD 
> stack (as opposed to the eCos one) and see how
IP_ONESBCAST is 
> implemented.  Then perhaps I could do the same thing in
my FreeBSD stack.
>
> Is there a way for me to download the FreeBSD source
code without 
> actually downloading, burning, and installing FreeBSD? 
Looking around 
> the FreeBSD website I don't see a source download
link.
>
> thanks,
> Tom.
> _______________________________________________
> freebsd-netfreebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-net
> To unsubscribe, send any mail to
"freebsd-net-unsubscribefreebsd.org"
You can get them via CVS: 
http://www.freebsd.org/doc/en/books/handbook/cvsup.html.


Also, although it, too, may be considered hacky, if the
system you're 
working on has pcap(3), you could just manually craft the
broadcast 
frame and send it out the interface yourself. I can provide
some sample 
code.

-Boris
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