Hi Sakib,
On 2015年04月07日 10:02, MD.Badruzzaman Shakib wrote:
> Hello everyone,
>
> I want to add/delete flows from my application when link_add/link_delete
> occurs. I create two separate handler function for link_add and link_delete
> which are decorated with corresponding event function. But in those functions
> I only have src, dst and src_port(connected to dst). But without any datapath
> object (ryu.controller.controller.Datapath) I cannot call my add_flow
> function. My add_flow function is given below. Can anyone please tell me how
> can I call the add_flow function from another function beside
> _packet_in_handler with the information(src, src_port, dst) i have? Is there
> any better process to add/delete flows without using packet_in_handler?
What "event" did you set to your link_add/link_delete functions?
You can get Datapath instance from Event instance("ev") in the event handlers.
e.g.)
@set_ev_cls(ofp_event.EventOFPSwitchFeatures, CONFIG_DISPATCHER)
def switch_features_handler(self, ev):
datapath = ev.msg.datapath
Thanks,
Iwase
>
> def add_flow(self, datapath, dst, actions):
> ofproto = datapath.ofproto
>
> match = datapath.ofproto_parser.OFPMatch(
>
> eth_type=0x800, ipv4_dst=dst)
>
> inst =
> [datapath.ofproto_parser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
> actions)]
>
> mod = datapath.ofproto_parser.OFPFlowMod(
> datapath=datapath, match=match, cookie=0,
> command=ofproto.OFPFC_ADD, idle_timeout=0, hard_timeout=0,
> priority=ofproto.OFP_DEFAULT_PRIORITY,
> flags=ofproto.OFPFF_SEND_FLOW_REM, instructions= inst)
>
> datapath.send_msg(mod)
>
> Thanking you
> Sakib
>
>
>
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