Hi,
I'm developping an Openflow app which calculates the optimal path
between two Openflow switches. Once my app knows the path to use it
needs to set up a flowmod in all the switches involved in the path. The
code of my app is triggered everytime a Packet_in_event happens.
I've been taking a look at the learning switch example code in coreapps
and seems that in order to create a fowmod you need acces to the buffer
of the switch which triggered the event.
If you are setting a flowmod in the switch which triggered the event
that's not a problem because you can get the buffer from the
Packet_in_event.
const Packet_in_event& pi = assert_cast<const Packet_in_event&>(e);
uint32_t buffer_id = pi.buffer_id;
ofm->buffer_id = htonl(buffer_id);
But my problem is that I also need to set flowmods in the other switches
which haven't received a Packet_in_event (therefore I can't acces their
buffers).
The acces to the buffer is really necesary to set up a flowmod in a
switch? Is there any way to do this?
Thank you.
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