Or, if you are in no particular hurry to get notifications about new flows, you can just periodically poll switch stats for all flows. This is not so nice and elegant, but it can save you headaches knowing the exact state of the switch -- especially if you use flowmod's which can modify/delete multiple rules at the same time and flows can expire as well.
Peter On Mon, Aug 4, 2014 at 5:53 PM, Adam Pavlidis <adampavli...@gmail.com> wrote: > Thank you very much, i will follow your suggestions. > > > On Mon, Aug 4, 2014 at 5:24 PM, Murphy McCauley <murphy.mccau...@gmail.com > > wrote: > >> You have to do it manually. It was expected that a higher-level API >> would be implemented that might be a reasonable place to implement such a >> feature, but such has never materialized. >> >> You could hack it in yourself, by patching the Connection.send() method >> to check the outgoing data for flow-mods, which isn't particularly elegant. >> A cleaner approach is to implement your own send_flow_mod() function or >> something and have this do whatever you need before forwarding on to >> Connection.send(). Of course, if you were using other components, they'd >> need to know to call this when appropriate. >> >> -- Murphy >> >> >> On Aug 4, 2014, at 5:17 AM, Adam Pavlidis <adampavli...@gmail.com> wrote: >> >> Hello, >> I am trying to code a module that need to performs some action when other >> modules (or the same module that is beside the point) install a flow rule >> on a switch. Is there an event that is raised automatically when a flow is >> installed? >> >> i.e. like _handle_PacketIn is raised to handle new packets or >> _handle_FlowRemoved is raised when a flow entry is removed? >> >> Or i have to manually perform what action i need, by finding the exact >> lines of code that install flow rules and add the actions i need to be >> performed just below? >> >> >> >
