Hello,
I'd like to delete all the flows in case of a SIGINT signal.
I added a handler for SIGINT signal and tried to delete the flows inside the
handler. But, it doesn't seem to work. I'm not getting errors when I try to send
the flow-mod message, though. I captured all control packets at the controller;
I don't see these delete flow-mods.
Skeleton code below. Any help would be appreciated.
Thanks,
/Aravind
fw_dp = None
def delete_flow(dp, table_id, match):
ofp = dp.ofproto
parser = dp.ofproto_parser
instructions = []
flow_mod = parser.OFPFlowMod(dp, 0, 0, table_id, ofp.OFPFC_DELETE, 0, 0, 1,
ofp.OFPCML_NO_BUFFER, ofp.OFPP_ANY, ofp.OFPG_ANY, 0, match,
instructions)
dp.send_msg(flow_mod)
def handler_signals(signal_num, frame):
global fw_dp
if signal_num == signal.SIGINT:
dp = fw_dp
ofp = dp.ofproto
parser = dp.ofproto_parser
match = parser.OFPMatch()
for table_id in range(TABLE_ID_DUMMY, TABLE_ID_NON_FPM + 1):
delete_flow(dp, table_id, match)
sys.exit(0)
class fw_app(app_manager.RyuApp):
def __init__(self, *args, **kwargs):
super(fw_app, self).__init__(args, **kwargs)
signal.signal(signal.SIGINT, handler_signals)
# Switch/controller bringup
@set_ev_cls(ofp_event.EventOFPSwitchFeatures, CONFIG_DISPATCHER)
def handle_switch_bringup(self, ev):
global fpm_dp
dp = ev.msg.datapath
fw_dp = dp
# Default rules and PACKET_IN handling code here
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