Hi Ramana,
In Ryu, TCP payload will be at the last element of pkt.protocols if the payload
exists.
e.g.)
If the payload exists:
pkt.protocols = [ethernet(...), ipv4(...), tcp(...), 'payload_data']
You can access the payload like "pkt.protocols[-1]".
If the payload does not exist:
pkt.protocols = [ethernet(...), ipv4(...), tcp(...)]
Thanks,
Iwase
On 2015年12月18日 12:58, Ramana Reddy wrote:
> Thanks for your reply. The library pkt.get_protocol(tcp.
> tcp) gives the entire packet including the header. I could not see any api to
> get only tcp payload. In pox, tcp.payload gives the payload without the
> header. Any such api in ryu.
>
> Thanks,
> Ramana
>
> On 18 Dec 2015 5:26 am, "Yusuke Iwase" <[email protected]
> <mailto:[email protected]>> wrote:
>
> Hi Ramana,
>
> Please refer to this Ryu-Book page for the usage of the packet library.
> http://osrg.github.io/ryu-book/en/html/packet_lib.html
>
> e.g.)
> tcp_packet = pkt.get_protocol(tcp.tcp)
> if tcp_packet:
> print(tcp_packet)
>
> Thanks,
> Iwase
>
> On 2015年12月18日 02:16, Ramana Reddy wrote:
> > What I need basically is:
> >
> > msg = ev.msg
> > pkt = packet.Packet(msg.data)
> >
> > from 'pkt' we will get all ethernet, IP and TCP headers using
> pkt.get_protocol(). But I would like to know
> > how to extract the payload of the packet after stripping of all these
> headers.
> >
> > Regards,
> > Ramana
> >
> >
> >
> > On Thu, Dec 17, 2015 at 10:38 PM, Ramana Reddy <[email protected]
> <mailto:[email protected]> <mailto:[email protected]
> <mailto:[email protected]>>> wrote:
> >
> > Hi All,
> >
> > I would like to know the API to extract the payload of a tcp packet.
> >
> >
> > Thanks & Regards,
> > Ramana
> >
> >
> >
> >
> >
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