Hi,
Please, see the code below:
pkt_tcp = pkt.get_protocol(tcp.tcp)
if pkt_tcp:
tcp_src_port = pkt_tcp.src_port
tcp_dst_port = pkt_tcp.dst_port
print "TCP_Source_port:", tcp_src_port
print "TCP_Dst_port:", tcp_dst_port
print "TCP Window size:", pkt_tcp.window_size
output at controller:
gv@controller:~/ryu/ryu/app$ ryu-manager myswitch_13.py
loading app myswitch_13.py
loading app ryu.controller.ofp_handler
instantiating app myswitch_13.py of SimpleSwitch13
instantiating app ryu.controller.ofp_handler of OFPHandler
TCP_Source_port: 39286
TCP_Dst_port: 22
TCP Window size: 299
packet in 37769644528961 02:e4:2e:e4:8a:23 02:4c:a0:20:cc:82 6
TCP_Source_port: 22
TCP_Dst_port: 39286
TCP Window size: 303
Thanks
Gandhimathi
On 3 May 2016 at 09:26, Randa Alani <el...@leeds.ac.uk> wrote:
> Dear all
>
>
>
> I am trying to get the TCP header but when I excute the following:
>
>
>
> pkt = packet.Packet(msg.data)
>
> eth = pkt.get_protocols(ethernet.ethernet)[0]
>
> print eth
>
>
>
>
>
> pkt_tcp= pkt.get_protocols(tcp.tcp)
>
> print pkt_tcp
>
>
>
>
>
> and send TCP packet, the result is:
>
>
>
> []
>
>
>
> Why it is empty?
>
>
>
> Actullay, I want to modify the window_size of the packet and send it back
> to the switch. How to do that.
>
>
>
> Any information would very helpful,
>
>
>
> Regards,
>
> Randa
>
>
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------------------------------------------------------------------------------
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Applications Manager provides deep performance insights into multiple tiers of
your business applications. It resolves application problems quickly and
reduces your MTTR. Get your free trial!
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