Register cdp_input when enabled for the first time

[vpp.git] / src / plugins / cdp / cdp_input.c

diff --git a/src/plugins/cdp/cdp_input.c b/src/plugins/cdp/cdp_input.c
index fa993b8..bce8eeb 100644 (file)
--- a/src/plugins/cdp/cdp_input.c
+++ b/src/plugins/cdp/cdp_input.c
@@ -276,13 +276,18 @@ cdp_packet_scan (cdp_main_t * cm, cdp_neighbor_t * n)
       tlv = (cdp_tlv_t *) cur;
       tlv->t = ntohs (tlv->t);
       tlv->l = ntohs (tlv->l);
-      if (tlv->t >= ARRAY_LEN (tlv_handlers))
-       return CDP_ERROR_BAD_TLV;
-      handler = &tlv_handlers[tlv->t];
-      fp = handler->process;
-      e = (*fp) (cm, n, tlv);
-      if (e)
-       return e;
+      /*
+       * Only process known TLVs. In practice, certain
+       * devices send tlv->t = 0xFF, perhaps as an EOF of sorts.
+       */
+      if (tlv->t < ARRAY_LEN (tlv_handlers))
+       {
+         handler = &tlv_handlers[tlv->t];
+         fp = handler->process;
+         e = (*fp) (cm, n, tlv);
+         if (e)
+           return e;
+       }
       /* tlv length includes (t, l) */
       cur += tlv->l;
     }