* About Raw socket, vlan + ip header
@ 2015-03-03 5:14 Sriram Raghunathan
2015-03-03 17:03 ` Philippe Troin
0 siblings, 1 reply; 3+ messages in thread
From: Sriram Raghunathan @ 2015-03-03 5:14 UTC (permalink / raw)
To: netdev
Hi,
My name is Sriram, have a question about raw socket programming.
Writing a socket program where, I'm trying to construct a ether frame
with vlan id and copying ip header there after. By using PF_PACKET
family.
But when I do a sendto, the ip header is stripped off from the
packet. Could you please let me know how to go about?
Having the ip header is necessary for a software here.
Thanks for the time.
Sriram
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: About Raw socket, vlan + ip header
2015-03-03 5:14 About Raw socket, vlan + ip header Sriram Raghunathan
@ 2015-03-03 17:03 ` Philippe Troin
2015-03-04 4:36 ` Sriram Raghunathan
0 siblings, 1 reply; 3+ messages in thread
From: Philippe Troin @ 2015-03-03 17:03 UTC (permalink / raw)
To: Sriram Raghunathan; +Cc: netdev
On Tue, 2015-03-03 at 10:44 +0530, Sriram Raghunathan wrote:
> Writing a socket program where, I'm trying to construct a ether frame
> with vlan id and copying ip header there after. By using PF_PACKET
> family.
>
> But when I do a sendto, the ip header is stripped off from the
> packet. Could you please let me know how to go about?
man 7 packet
...
The socket_type is either SOCK_RAW for raw packets including the link
level header or SOCK_DGRAM for cooked packets with the link level
header removed. The link level header information is available in a
common format in a sockaddr_ll. protocol is the IEEE 802.3 protocol
...
Are you opening a SOCK_RAW or a SOCK_DGRAM PF_PACKET socket?
Phil.
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: About Raw socket, vlan + ip header
2015-03-03 17:03 ` Philippe Troin
@ 2015-03-04 4:36 ` Sriram Raghunathan
0 siblings, 0 replies; 3+ messages in thread
From: Sriram Raghunathan @ 2015-03-04 4:36 UTC (permalink / raw)
To: ext Philippe Troin, Sriram Raghunathan; +Cc: netdev
Hi Philippe,
Using SOCK_RAW.
Sriram
On Tuesday 03 March 2015 10:33 PM, ext Philippe Troin wrote:
> On Tue, 2015-03-03 at 10:44 +0530, Sriram Raghunathan wrote:
>> Writing a socket program where, I'm trying to construct a ether frame
>> with vlan id and copying ip header there after. By using PF_PACKET
>> family.
>>
>> But when I do a sendto, the ip header is stripped off from the
>> packet. Could you please let me know how to go about?
> man 7 packet
>
> ...
> The socket_type is either SOCK_RAW for raw packets including the link
> level header or SOCK_DGRAM for cooked packets with the link level
> header removed. The link level header information is available in a
> common format in a sockaddr_ll. protocol is the IEEE 802.3 protocol
> ...
>
> Are you opening a SOCK_RAW or a SOCK_DGRAM PF_PACKET socket?
>
> Phil.
>
^ permalink raw reply [flat|nested] 3+ messages in thread
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