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Networking/Discussion/Networking Drivers/Raw Socket support in IO-PKT/List of Posts
Forum Topic - Raw Socket support in IO-PKT: (8 Items)
   
Update
sathish kumar
03/23/2009 11:06 PM
post25060
Raw Socket support in IO-PKT   
HI All,

Is Raw socket supported in Io-Pkt . If yes, is the procedure to open raw socket same as Netbsd socket types. Please 
point me some sample program to open raw socket in QNX Io-Pkt.

Thanks,
Sean Boudreau(deleted)
03/24/2009 11:03 AM
post25112
Re: Raw Socket support in IO-PKT   
On Mon, Mar 23, 2009 at 11:06:06PM -0400, sathish kumar wrote:
> HI All,
> 
> Is Raw socket supported in Io-Pkt . If yes, is the procedure to open raw socket same as Netbsd socket types. Please 
point me some sample program to open raw socket in QNX Io-Pkt.

Yes they're supported and the same as NetBSD. Please see the
'ping' and 'traceroute' utilities for examples.

-seanb
sathish kumar
03/27/2009 6:41 AM
post25431
Re: Raw Socket support in IO-PKT   
Hi ,
The raw socket used in Ping and traceroute utilities send IP packets as a whole without data link level headers. My 
requirement is to give the entire packet including the data link level headers, ip header and other headers/data. Can i 
use SOCK_PACKET socket type for this in QNX. Please advise.
Sean Boudreau(deleted)
03/27/2009 9:02 AM
post25442
Re: Raw Socket support in IO-PKT   
On Fri, Mar 27, 2009 at 06:41:41AM -0400, sathish kumar wrote:
> Hi ,
> The raw socket used in Ping and traceroute utilities send IP packets as a whole without data link level headers. My 
requirement is to give the entire packet including the data link level headers, ip header and other headers/data. Can i 
use SOCK_PACKET socket type for this in QNX. Please advise.

We've no SOCK_PACKET.  To do what you describe BPF would have to
be used.

Regards,

-seanb
sathish kumar
03/31/2009 5:04 AM
post25627
Re: Raw Socket support in IO-PKT   
Hi,

Can i send and receive raw ethernet packets using BPF??

Thanks,
Sean Boudreau(deleted)
03/31/2009 9:24 AM
post25638
Re: Raw Socket support in IO-PKT   
On Tue, Mar 31, 2009 at 05:04:20AM -0400, sathish kumar wrote:
> Hi,
> 
> Can i send and receive raw ethernet packets using BPF??

Yes.  Please see tcpdump for an example of receiving them.
For sending you always need to leave space for the ethernet
header which by default will be filled in for you.  If you
want to pre-fill it and send it out as is the BIOCSHDRCMPLT
ioctl must be used on the bpf descriptor.

-seanb
Sean Boudreau(deleted)
03/31/2009 10:08 AM
post25648
Re: Raw Socket support in IO-PKT   
> On Tue, Mar 31, 2009 at 05:04:20AM -0400, sathish kumar wrote:
> > Hi,
> > 
> > Can i send and receive raw ethernet packets using BPF??
> 
> Yes.  Please see tcpdump for an example of receiving them.
> For sending you always need to leave space for the ethernet
> header which by default will be filled in for you.  If you
> want to pre-fill it and send it out as is the BIOCSHDRCMPLT
> ioctl must be used on the bpf descriptor.

Slight clarification.  By default the ethernet destination
address and ether type is always taken from the header you
provide and the source it taken from the interface you're
sending on.  If BIOCSHDRCMPLT is used the source is also
taken from the header you provide.

-seanb
Robert Craig
03/31/2009 10:12 AM
post25649
RE: Raw Socket support in IO-PKT   
There's also example code here:

http://community.qnx.com/sf/go/projects.networking/discussion.general.to
pc6288

(See my post just before the last one which contains icmp.c) 


   R.

-----Original Message-----
From: Sean Boudreau [mailto:community-noreply@qnx.com] 
Sent: Tuesday, March 31, 2009 10:09 AM
To: drivers-networking
Subject: Re: Raw Socket support in IO-PKT

> On Tue, Mar 31, 2009 at 05:04:20AM -0400, sathish kumar wrote:
> > Hi,
> > 
> > Can i send and receive raw ethernet packets using BPF??
> 
> Yes.  Please see tcpdump for an example of receiving them.
> For sending you always need to leave space for the ethernet header 
> which by default will be filled in for you.  If you want to pre-fill 
> it and send it out as is the BIOCSHDRCMPLT ioctl must be used on the 
> bpf descriptor.

Slight clarification.  By default the ethernet destination address and
ether type is always taken from the header you provide and the source it
taken from the interface you're sending on.  If BIOCSHDRCMPLT is used
the source is also taken from the header you provide.

-seanb

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Networking Drivers
http://community.qnx.com/sf/go/post25648

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