pimd: Allow SPT switchover

This allows SPT switchover for S,G upon receipt of packets
on the LHR.

1) When we create a *,G from a IGMP Group Report, install
the *,G route with the pimreg device on the OIL.

2) When a packet hits the LHR that matches the *,G, we will
get a WHOLEPKT callback from the kernel and if we cannot
find the S,G, that means we have matched it on the LHR via
the *,G mroute.  Create the S,G start the KAT and run
inherited_olist.

3) When the S,G times out, safely remove the S,G via
the KAT expiry

4) When the *,G is removed, remove any S,G associated
with it via the LHR flag.

Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/pimd/pim_ifchannel.c b/pimd/pim_ifchannel.c
index e6b4ba92a9..e1697960e4 100644
--- a/pimd/pim_ifchannel.c
+++ b/pimd/pim_ifchannel.c
@@ -1006,6 +1006,7 @@ pim_ifchannel_local_membership_add(struct interface *ifp,
 	      pim_upstream_switch (child, PIM_UPSTREAM_JOINED);
 	    }
         }
+      pim_channel_add_oif(up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_IGMP);
     }
 
   return 1;