Hi,

As far as I know, OpenFlow doesn't seem to support such feature. To modify
some header fields, OpenFlow provide the SET-FIELD action, but this action
can modify the fields definited as the match fields. So if there is no
corresponding field in the match fields, you can't modify the IPv4 Option
fields.

OpenFlow 1.3 standard match fields:
https://ryu.readthedocs.io/en/latest/ofproto_v1_3_ref.html#flow-match-structure

Optionally, Nicira extended match fields:
https://ryu.readthedocs.io/en/latest/nicira_ext_ref.html#module-ryu.ofproto.nicira_ext

Regards,
Iwase


2019年7月30日(火) 21:15 Pynbiang Hadem <pynbiang.ha...@gmail.com>:

> Hi,
>
> How can I write or update the IP Option field of IPv4 header of a packet
> without changing the other header fields of the packet?.
>
> Thanks
> Hadem
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