pimd: Add some explanatory debugging for a error condition.

When we decide to ignore a incoming packet, allow detailed
debugging to give a pointer to where to go to understand the
issue.

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

pimd: Fix test for (S,G,rpt) prune inclusion.

The (S,G,rpt) prune inclusion was incorrectly considering
if the RPF' was the same for (S,G) and (*,G).

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

pimd: No need to reset uptime if state is the same

Do not reset the time the mroute has been in it's
current state if we get a transition to the same state.

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

pimd: Abstract setting of the spt bit a bit more

Allow the spt bit to be set appropriately from multiple
places.

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

pimd: Add ability to set SPTBIT on a S,G stream

Implement 4.2.2 for setting the SPT bit.

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

pimd: Start addition of timer wheel

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

lib: Add Timer Wheel functionality

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

pimd: Start coding of sending Prune (s,g,rpt) with *,g prune.

Add logic to show that we are making decisions about
the s,g,rpt prune send.  We are not actually sending
anything yet.

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

pimd: Add some helper functions.

Currently these are stubs to help debug logic.
Will be filled in as we go.

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

pimd: Add the ability to test if the RPF' is the same

Test the ability to see if two RPF' are the same
or not.

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

PIM After LHR swp bounce toward rx host, igmp_source_forward_start
failure message repeats in log

Signed-off-by: Daniel Walton <dwalton@cumulusnetworks.com>
Ticket: CM-13340

pimd: Add ability to listen to igmp messages on 224.0.0.2

Some igmpv2 messages are sent to 224.0.0.2.  We were
not listening for these messages and as such we
were ignoring some withdrawals.

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

pimd: Fix 'ip igmp join ..'

When a static igmp join is issued, before routing
has come up, the ability to recover was accidently
removed from the code.

Ticket: CM-13379
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>

pimd: When nexthop lookup fails, back out gracefully

When the nexthop lookup fails when establishing the
upstream state as part of a register receive, kill
the upstream state.

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

pimd: Allow FHR/RP/LHR to be one and the same

When we have a FHR/RP/LHR all on the same box, we were
experiencing a situation where we were not sending
a register stop nor where we setting the sptbit.

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

pimd: Modify Debug to be better

Make debugs of some pim processes easier
to interpret and understand.

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

pimd: Be more careful looking up mroute statistics

When we get a request to look up the mroute statistics
from the kernel, ensure that the interface returned
is a valid usable interface.

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

pimd: pim upstream child list

Add the ability to keep the list of S,G's associated with
a *,G.

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

pim-msdp: part-1 - initial protocol infra.

This commit includes the following changes -
1. Support for MSDP peer DB (hash and sorted list).
2. Support for the following timers - keepalive, connect-retry, hold.
3. TCP session management (lower-ip is active, higher-ip is passive).
4. MSDP KA packet rx/tx.
5. Limited temporary config (will be replaced with the more automation
friendly RP-set).

Testing done -
Peer bringup/deletion (including interop with another vendor)

Sample out -
root@dell-s6000-04:~# sudo vtysh -c "show ip msdp peer"
Peer                       Local        Mesh-group        State Uptime
100.1.1.1              100.1.2.1           default  established 00:07:27
100.1.3.1              100.1.2.1           default  established 00:31:50
root@dell-s6000-04:~#

Coming soon -
1. part-2: SA cache management.
2. part-3: SPT setup using source in SA cache.
3. part-4: CLI cleanup.

Ticket: CM-13306

Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
Acked-by: Donald Sharp <sharpd@cumulusnetworks.com>

pimd: Fix gcc compile issue.

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

pimd: Pass in upstream to pim_msg_join_prune_encode.

Pass in the upstream data structure to pim_msg_join_prune_encode
so it can decide to send (S,G,rpt) information if it wants to or
not.

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

pimd: Remove unused/unmaintained test commands

The test commands are not being maintained and
are not out of date with the rest of the system.  There
are better ways to test code and in addition these
commands if entered by a user could seriously impact
their running system.

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

pimd: Convert pim_joinprune_send to receive upstream

When sending a join/prune send in the upstream pointer.
this will allow us to implement some of the other state
machines necessary.

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

pimd: When nexthop_lookup fails allow a retry.

We are seeing situations where nexthop lookups are failing
unexpectedly.  Don't consider the lookup to have succeeded
in this case to allow the next lookup to work?

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

pimd: Ignore (S,G) Prunes with no current state

If we get a (S,G) Prune with no current ifchannel state, ignore
the neighbors request.

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

pimd: Find an interface that is both connected and setup for pim

When we are looking up the incoming interface for the ipmr
call back socket from the kernel, look to see if the src
is connected as well as has a valid pim_ifp to use.

This is to allow vrr configuration in a mlag env.

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

pimd: Start (S,G,rpt) coding

Start putting some infrastructure for (S,G,rpt) handling

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

pimd: Clean up the interface deletion

When cleaning up the interface, actually clean up
data associated with that interface.

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

pimd: Make sure we have valid pointer when printing debugs

When we print a debug in the pim_upstream_add, there
exists failure cases for pim_upstream_new where
we cannot create a upstream data structure.  Make
sure the debug handles it right.

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

pimd: Fix possible crash using 'struct pim_nexthop'

When passing in a nexthop data structure to nexthop_lookup
ensure that it is zero'ed out.

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

pimd: Ensure 'struct nexthop' has been zeroed

When calling nexthop_lookup, the code assumes
that the nexthop passed in has been 0'ed out.

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

pimd: Fix crash when cannot find igmp

When we look up a igmp data structure, if we
don't find it, safely do nothing.

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

pimd: Add basic nexthop lookup cached information.

Cache the last time we looked up the nexthop for this particular
address.  Store time to usec accuracy.

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

pimd: Add the ability to get time in usec

Add ability to return a int64_t time in usec.

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

pimd: Fix possible double free of upstream

Fix possible double free of upstream and in
addition add some debug code to help find
where the problem is coming from.

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

pimd: Fix crash when igmp message comes in on non-configured interface

When we receive a igmp message through the kernel upcall, make
sure that we are configured to work on that interface via pim/igmp
before attempting to use that interface.

Ticket: CM-13338
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>

pimd: Fix child ifchannel overwrite parent ifchannel

When we look for child channels, don't overwrite the
parents ifchannel.  Leave that one alone.

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

pimd: always build json for show commands

Signed-off-by: Daniel Walton <dwalton@cumulusnetworks.com>
This cleans up the following so that they always collect the data to
display in json structures and then either dumps the json output or
traverses it to produce the non-json output.

  show ip pim local-membership
  show ip pim interface

pimd: Fix pim_nexthop_lookup

There are situations where we may never look at a better
route for nexthop_lookup.

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

pimd: Fix uninitialized value

When handling a igmp request, fill in group address before
we attempt to output debug information on it.

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

pimd: Add interface to ifchannel debugs

When outputting data about ifchannels due to debug
include the interface this is happening on.

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

pimd: Add debug for packet stats

Allow us to figure out what is going wrong in some
situations, so add some debugs.

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

pimd: Fix ifchannel being left around

In some situations, the deletion of the ifchannel would
not ocurr if the last flag cleared was the assert flag.

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

pimd: Fix show of 'ip pim rp keep-alive-timer

When displaying this changed value, we were
using an incorrect data value.

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

pimd: replace grp_str[100] with grp_str[INET_ADDRSTRLEN]

Signed-off-by: Daniel Walton <dwalton@cumulusnetworks.com>

pimd: add support for IGMPv2

Signed-off-by: Daniel Walton <dwalton@cumulusnetworks.com>
Ticket: CM-7962

pimd: Allow debugs entered in conf t mode to persist

When entering debug commands under 'conf t' mode
allow the debugs to be saved for future fun and
adventure.

Ticket: CM-13213
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>

pimd: Allow mroute to return if incoming interface comes back

If the incoming interface comes back, reinstall the channel oil
if the mroute is not installed.

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

pimd: Create channel_oil hash for quicker lookup

When looking up the channel_oil use a hash
to find it.  Keep the list around for quick
walks of the channel oils.

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

pimd: Add hash lookups for upstream

pimd: Only delete on KAT when created by stream

When we have pim_mroute.c or pim_register.c create
the upstream state, only delete it then when
the KAT timer expires, else we will not have
the refcount right and we will do bad things.

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

pimd: Fix message size read from kernel

When we read data from the kernel allow for
larger packet sizes to be sent to us.

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

pimd: Fix LHR both a receiver and a sender

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

zebra: Fix include order for build

pimd: Allow bigger packet sizes when receiving callbacks.

When receiving callbacks from the kernel allow bigger
packet sizes than 3k to be handled appropriately.

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

pimd: Fix crash when looking at S,G from *,G

When looping over S,G's associated with a *,G,
there can exist situations where we have not created
the channel oil for the S,G yet.  Don't allow this
to crash the system.

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

pimd: 'sh ip pim int' showed local IP as the DR

Signed-off-by: Daniel Walton <dwalton@cumulusnetworks.com>

pimd: use JSON_C_TO_STRING_PRETTY everywhere

Signed-off-by: Daniel Walton <dwalton@cumulusnetworks.com>

pimd: 'show ip pim state json' use JSON_C_TO_STRING_PRETTY

Signed-off-by: Daniel Walton <dwalton@cumulusnetworks.com>
Ticket: CM-11812

pimd: initial "show ip pim state"

Signed-off-by: Daniel Walton <dwalton@cumulusnetworks.com>
Ticket: CM-11812

superm-redxp-05# show ip pim state

Source           Group            IIF    OIL
20.0.13.253      230.10.10.1      br1    swp1
20.0.13.253      230.20.20.1      br1
0.0.0.0          230.40.40.1      swp1   br1
0.0.0.0          230.42.42.1      swp1   br1
0.0.0.0          230.42.43.1      swp1   br1

superm-redxp-05#
superm-redxp-05# show ip pim state 20.0.13.253

Source           Group            IIF    OIL
20.0.13.253      230.10.10.1      br1    swp1
20.0.13.253      230.20.20.1      br1

superm-redxp-05# show ip pim state 20.0.13.253 230.10.10.1

Source           Group            IIF    OIL
20.0.13.253      230.10.10.1      br1    swp1

superm-redxp-05#
superm-redxp-05# show ip pim state 230.40.40.1

Source           Group            IIF    OIL
0.0.0.0          230.40.40.1      swp1   br1

superm-redxp-05# show ip pim state 230.40.40.1 json
{
  "230.40.40.1":{
    "0.0.0.0":{
      "swp1":{
        "br1":{
          "source":"0.0.0.0",
          "group":"230.40.40.1",
          "inboundInterface":"swp1",
          "outboundInterface":"br1"
        }
      }
    }
  }
}
superm-redxp-05#

pimd: Print '*' for INADDR_ANY

When INADDR_ANY is sent to the pim dump function, return "*"

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

pimd: sort pim_ifchannel_list

Signed-off-by: Daniel Walton <dwalton@cumulusnetworks.com>
Reviewed-by: Donald Sharp <sharpd@cumulusnetworks.com>

pimd: sort qpim_channel_oil_list and qpim_upstream_list

Signed-off-by: Daniel Walton <dwalton@cumulusnetworks.com>
This allows "show ip mroute" and "show ip pim upstream" to display the
groups in order.

pimd: Add debug wrapping around rp nexthop lookup

When looking up the RP only print debugs when
debugging is turned on.

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

pimd: Added json to 'show ip igmp group'

Signed-off-by: Daniel Walton <dwalton@cumulusnetworks.com>
root@superm-redxp-05[quagga-pim]# vtysh -c 'show ip igmp group'
Interface Address         Group           Mode Timer    Srcs V Uptime
br1       20.0.13.1       230.40.40.1     EXCL 00:03:24    1 3 00:01:28
root@superm-redxp-05[quagga-pim]#
root@superm-redxp-05[quagga-pim]#
root@superm-redxp-05[quagga-pim]# vtysh -c 'show ip igmp group json' |
python -m json.tool
{
    "br1": {
        "230.40.40.1": {
            "group": "230.40.40.1",
            "mode": "EXCLUDE",
            "source": "20.0.13.1",
            "sourcesCount": 1,
            "timer": "00:03:23",
            "uptime": "00:01:30",
            "version": 3
        },
        "address": "20.0.13.1",
        "flagBroadcast": true,
        "flagMulticast": true,
        "index": 96,
        "lanDelayEnabled": true,
        "name": "br1",
        "state": "up"
    }
}
root@superm-redxp-05[quagga-pim]#

pimd: Don't ask for information when you are notgoing to get an answer

When we have intentionally not installed a mroute( for whatever
reason ), do not ask for information about that mroute from the
kernel when it happens.

Ticket: CM-12986
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>

pimd,zebra: Pass back error message if received

When zebra asks for mroute information let pim
know that the request failed or succeeded.

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

lib, pimd: Modify writen to retry on certain failures

When writen fails, allow itto retry on certain failures
until it succeeds.

Ticket: CM-12986
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>

zebra: Fix up the debug for receiving multicast routes

Improve the netlink debug message.

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

pimd: Remove some more unprotected warnings/debugs

Pim is outputting a bunch of unprotected debugs.
In a system with a high # of events even with
no logging we will receive lots of messages.

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

pimd: Fix 'show ip mroute count'

Add the lastused data.

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

pimd: Fixup to use new lastused

The kernel now reports lastused as the time in hz since
we last saw any packets.  So let's start tracking it
that way.

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

pimd: Fixup pim mroute output

Cleanup the 'show ip mroute' command to be a bit
more minimalistic.

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

pimd: Track upstream state a bit better.

Track the upstream state if we are adding
a new state to a pre-existing upstream.

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

pimd: When sending a register stop don't need a nbr

When you send a register stop it is not necessary to
have a neighbor out the choosen interface.

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

pimd: Stop join/prunes from crashing

When we receive a join/prune for a upstream
that we are unable to create, safely ignore
the request until the situation resolves itself.

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

pimd: Allow igmp query to go out immediately on startup

When starting up allow the 1st query to go out immediately,
well ok 1 second, and then the next queries to go out in
query_interval/4 seconds until startup mode is finished.

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

pimd: Do not send register stop in some cases

When we are disabling pim, there exists some
race conditions where we are attempting
to send a register stop out a interface that
is not setup for pim yet.

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

pimd: Further work to fix rpf lookups and nbrs

When we do a RPF lookup return a path that we have
neighbors for in those cases where we need to have
a neighbor to pass along the SG state via a pim
join/prune message.

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

pimd: Add debug messages as to why a register packet is rejected.

When we reject a register message from someone, give some reasoning
as to the why of it being rejected to help in debugging the situation.

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

pimd: "show ip mroute" skips entries without an OIF

Signed-off-by: Daniel Walton <dwalton@cumulusnetworks.com>
The entry for 230.10.10.4 was not being displayed

root@superm-redxp-05[pimd]# ip mroute show
(20.0.13.253, 230.10.10.4)       Iif: br1
(20.0.13.253, 230.10.10.1)       Iif: br1        Oifs: swp1
root@superm-redxp-05[pimd]#

root@superm-redxp-05[pimd]#
root@superm-redxp-05[pimd]# vtysh -c 'show ip mroute'
Proto: I=IGMP P=PIM S=STATIC O=SOURCE

Source          Group           Proto Input iVifI Output oVifI TTL Uptime
20.0.13.253     230.10.10.1     P     br1       1 swp1       2   1 00:01:09
20.0.13.253     230.10.10.4     P     br1       1 none       0   0 --:--:--
root@superm-redxp-05[pimd]#

pimd: JSON support for "show ip mroute"

Signed-off-by: Daniel Walton <dwalton@cumulusnetworks.com>
Ticket: CM-12876

root@superm-redxp-05[pimd]# vtysh -c 'show ip mroute json' | pjson
{
  "230.10.10.1": {
    "20.0.13.253": {
      "br1": {
        "swp1": {
          "group": "230.10.10.1",
          "iVifI": 1,
          "inboundInterface": "br1",
          "oVifI": 2,
          "outboundInterface": "swp1",
          "protocolPim": true,
          "source": "20.0.13.253",
          "ttl": 1,
          "upTime": "00:02:37"
        }
      }
    }
  },
  "230.10.10.4": {
    "20.0.13.253": {
      "br1": {}
    }
  }
}
root@superm-redxp-05[pimd]#

pimd: json support for "show ip pim" commands

Signed-off-by: Daniel Walton <dwalton@cumulusnetworks.com>
Ticket: CM-12865

pimd: show ip pim int WORD, show ip pim nei WORD, show ip igmp int WORD

Signed-off-by: Daniel Walton <dwalton@cumulusnetworks.com>
Ticket: CM-11812

pimd: Turn off neighbor lookup for the moment

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

pimd: show ip pim int WORD, show ip pim nei WORD, show ip igmp int WORD

Signed-off-by: Daniel Walton <dwalton@cumulusnetworks.com>
Ticket: CM-11812

pimd: Bad Bit shifts

I programmed the bit shifts improperly.

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

pimd: Rework approach for needing nbrs

Pim sometimes needs the upstream rpf lookup to
only take into account if we have a nbr out
the selected interface or not.  Move
the code for this to a better spot so
we can make a more intelligent decision
here.

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

pimd: Allow loopbacks to resolve

When doing a rpf check ensure that
if we've considered the RP to be a loopback
allow there to be no neighbor on the other
side.

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

pimd: Resolve rp after neighbor come up

When a neighbor comes up, see if we suddenly
have a path to the RP.

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

pimd: Only use paths that we have nbrs on

When looking up nexthops for a path, we
should only allow nexthops that we
actually have neighbors formed for.  Otherwise
when we send join/prune messages they will
do nothing.

Ticket:CM-12754
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>

pimd: Don't assert when looking up a neighbor

Do not assert when looking up a neighbor, we don't know
if we have a neighbor don't punish us.

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

pimd, zebra: Pass the ifindex for NEXTHOP_TYPE_IPV4

NEXTHOP_TYPE_IPV4 has the ifindex of the route.  Pass it
along so the other side can use it if it is needed.

This will make pim much happier in that we will need to do less
recursive lookups.

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

pimd: Use MULTIPATH_NUM for maxpaths

When looking up nexthops for a address, just
use the MULTIPATH_NUM as the number allowed
to receive instead of an arbitrary limit of 20 paths.

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

PIM: json support for "show ip pim" commands

Signed-off-by: Daniel Walton <dwalton@cumulusnetworks.com>
Reviewed-by: Donald Sharp <sharpd@cumulusnetworks.com>
Ticket: CM-12865

PIM: prefix-list support for selecting RP

Signed-off-by: Daniel Walton <dwalton@cumulusnetworks.com>
Reviewed-by: CCR-5173
Ticket: CM-12819

pimd: Start noticing where upstream state came from

We need the ability to know where upstream state
comes from and to do the right thing from there.

ticket: CM-12771
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>

pimd: Add some additional upstream sources

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

pimd: Switch all up->fhr to use up->flags

Allow up->flags to know if we are a FHR or not

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

pimd: Allow flags to know if this is a FHR or not

Start the switch of storing if the upstream (S,G) is located
on the FHR or not.

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