Sorry. The last mail is incomplete, please ignore it!!
Hi all,
I am wondering where is the framing code for the OpenFlow protocol messages.
I mean the OpenFlow switch talks to NOX through a reliable byte stream
channel (e.i. TCP or SSL).
So, there must be a model to buffer the received bytes from a OpenFlow
Switch, and returns a completed OpenFlow message when it has received enough
bytes.
Please see the comments, [1] [2] [3], I added into the source code below:
in the file "noxcore/src/builtin":
bool
Conn::do_poll()
{
int error;
//[1] the framing job must be done in the oconn->recv_openflow()
std::auto_ptr<Buffer> b(oconn->recv_openflow(error, false));
switch (error) {
case 0: {
datapathid dp_id = oconn->get_datapath_id();
//[2] here, the Buffer b contains a completed OpenFlow message
std::auto_ptr<Event> event(openflow_packet_to_event(dp_id, b));
if (event.get()) {
event_dispatcher.dispatch(*event);
}
return true;
}
... ...
}
in the file "noxcore/src/lib"
//[3] the framing job is actually done here implicitly?
std::auto_ptr<Buffer>
Datapath::do_recv_openflow(int& error) //this is called by
oconn->recv_openflow()
{ ... ... }
Deng
On Tue, Jan 20, 2009 at 12:00 AM, Ye Deng <[email protected]> wrote:
> Hi all,
>
> I am wondering where is the framing code for the OpenFlow protocol.
> I mean the OpenFlow talks to NOX through a reliable byte stream channel
> (e.i. TCP or SSL).
> So, there must be a model to buffer the received bytes from a OpenFlow
> Switch, and returns a completed OpenFlow message when it has received enough
> bytes.
>
> Please see the comments, [1] [2], I added into the source code below:
>
> in the file "noxcore/src/builtin":
> bool
> Conn::do_poll()
> {
> int error;
> std::auto_ptr<Buffer> b(oconn->recv_openflow(error, false));
> switch (error) {
> case 0: {
> datapathid dp_id = oconn->get_datapath_id();
>
> // [2]
> std::auto_ptr<Event> event(openflow_packet_to_event(dp_id, b));
> if (event.get()) {
> event_dispatcher.dispatch(*event);
> }
> return true;
> }
> ... ...
> }
>
>
>
>
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