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pimd: During prefix-list update, behave as PIM_UPSTREAM_NOTJOINED state (conformance issue)

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Issue:
If there are any changes to the prefix list, we perform a re-lookup to map the correct RP for the group.
Even if the S,G entry is PIM_UPSTREAM_NOTJOINED and in FHR, In the case of IGMPv3, an S,G entry can be
created with no joins. this is not necessary.
 https://www.rfc-editor.org/rfc/rfc4601#section-4.5.7 says no op in case of NOTJOINED

Solution:
To solve this issue, Stop RP mapping when the state is NOTJOINED

Ticket: #3496931

Signed-off-by: Rajesh Varatharaj <rvaratharaj@nvidia.com>
This commit is contained in:
Rajesh Varatharaj 2023-06-21 10:59:12 -07:00 committed by Jafar Al-Gharaibeh
parent 075f44a417
commit 51f26d17da
1 changed files with 6 additions and 0 deletions
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6
pimd/pim_upstream.c
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@ -643,6 +643,12 @@ void pim_upstream_update_use_rpt(struct pim_upstream *up,
if (pim_addr_is_any(up->sg.src)) if (pim_addr_is_any(up->sg.src))
return; return;
/* Ignore RP mapping when the upsteam state
* is NOT Joined on a FHR
*/
if (up->join_state == PIM_UPSTREAM_NOTJOINED && PIM_UPSTREAM_FLAG_TEST_FHR(up->flags))
return;
old_use_rpt = !!PIM_UPSTREAM_FLAG_TEST_USE_RPT(up->flags); old_use_rpt = !!PIM_UPSTREAM_FLAG_TEST_USE_RPT(up->flags);
/* We will use the SPT (IIF=RPF_interface(S) if - /* We will use the SPT (IIF=RPF_interface(S) if -