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| author | Mobashshera Rasool <mrasool@vmware.com> | 2022-11-21 12:10:02 +0100 |
|---|---|---|
| committer | Mobashshera Rasool <mrasool@vmware.com> | 2022-11-22 06:57:39 +0100 |
| commit | c6950cb34358181d5830f0c8fdefed590fbe0586 (patch) | |
| tree | de21c2fc9b4fadf319a608adc7bfc14071c5ce9b /pimd | |
| parent | Merge pull request #12336 from cscarpitta/fix/increase-sid-index-limit (diff) | |
| download | frr-c6950cb34358181d5830f0c8fdefed590fbe0586.tar.xz frr-c6950cb34358181d5830f0c8fdefed590fbe0586.zip | |
pim6d, pimd: Discard (*,G) join if WC bit is set but RPT bit is unset.
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>
Diffstat (limited to 'pimd')
| -rw-r--r-- | pimd/pim_join.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/pimd/pim_join.c b/pimd/pim_join.c index 8c7ae80d2..7b252ad57 100644 --- a/pimd/pim_join.c +++ b/pimd/pim_join.c @@ -72,8 +72,21 @@ static void recv_join(struct interface *ifp, struct pim_neighbor *neigh, * If the RPT and WC are set it's a (*,G) * and the source is the RP */ - if ((source_flags & PIM_RPT_BIT_MASK) - && (source_flags & PIM_WILDCARD_BIT_MASK)) { + if (CHECK_FLAG(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 join since WC bit is set but RPT bit is unset", + sg); + + return; + } + struct pim_rpf *rp = RP(pim_ifp->pim, sg->grp); pim_addr rpf_addr; |