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pim6d, pimd: Discard (*,G) prune if WC bit is set but RPT bit is unset.

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As per RFC 7761, Section 4.9.1
The RPT (or Rendezvous Point Tree) bit is a 1-bit value for use
with PIM Join/Prune messages (see Section 4.9.5.1). If the
WC bit is 1, the RPT bit MUST be 1.

ANVL conformance test case is trying to verify this and is failing.

Issue: #12354

Signed-off-by: Mobashshera Rasool <mrasool@vmware.com>
This commit is contained in:
Mobashshera Rasool 2022-11-21 03:15:28 -08:00
parent c6950cb343
commit a23a485cbf
1 changed files with 15 additions and 2 deletions
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17
pimd/pim_join.c
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@ -140,8 +140,21 @@ static void recv_prune(struct interface *ifp, struct pim_neighbor *neigh,
++pim_ifp->pim_ifstat_prune_recv; ++pim_ifp->pim_ifstat_prune_recv;
if ((source_flags & PIM_RPT_BIT_MASK) if (CHECK_FLAG(source_flags, PIM_WILDCARD_BIT_MASK)) {
&& (source_flags & PIM_WILDCARD_BIT_MASK)) { /* As per RFC 7761 Section 4.9.1:
* The RPT (or Rendezvous Point Tree) bit is a 1-bit value for
* use with PIM Join/Prune messages (see Section 4.9.5.1). If
* the WC bit is 1, the RPT bit MUST be 1.
*/
if (!CHECK_FLAG(source_flags, PIM_RPT_BIT_MASK)) {
if (PIM_DEBUG_PIM_J_P)
zlog_debug(
"Discarding (*,G)=%pSG prune since WC bit is set but RPT bit is unset",
sg);
return;
}
/* /*
* RFC 4601 Section 4.5.2: * RFC 4601 Section 4.5.2:
* Received Prune(*,G) messages are processed even if the * Received Prune(*,G) messages are processed even if the