Hello.
Yes, you can do it with SO_MARK socket option.
>From socket man:
SO_MARK (since Linux 2.6.25)
Set the mark for each packet sent through this socket (similar
to the netfilter MARK target but socket-based). Changing the
mark can be used for mark-based routing without netfilter or
for packet filtering. Setting this option requires the
CAP_NET_ADMIN capability.
2014-06-02 14:25 GMT+04:00 Vishwas Srivastava <vishu.kernel@xxxxxxxxx>:
> Hi all,
> Is it possible to set the skb->mark flied of the linux socket
> buffer from the application?
>
> Suppose application is using the Raw socket of Ethernet interface and it
> sends and receive packets to that interface. However, application wants to
> set the skb->mark filed of the socket buffer which in turn is honoured by
> the ethernet driver. I could not find any option in the api "setsockopt"
> which will allow to set the skb->mark field.
>
> Anybody having any idea if it can be done from the application?
> thanks,
> Vishwas S
>
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--
Anton.
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