From: Donald Sharp <sharpd@cumulusnetworks.com>
Date: Thu, 3 Nov 2016 20:23:50 +0000 (-0400)
Subject: pimd: Add some explanatory debugging for a error condition.
X-Git-Tag: frr-3.0-branchpoint~64^2~10^2~131
X-Git-Url: https://git.puffer.fish/?a=commitdiff_plain;h=ffac1326b2f0d6a496e27c49f3a948b846fa16fc;p=mirror%2Ffrr.git

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>
---

diff --git a/pimd/pim_mroute.c b/pimd/pim_mroute.c
index 467fc45b98..48890d32fd 100644
--- a/pimd/pim_mroute.c
+++ b/pimd/pim_mroute.c
@@ -103,7 +103,12 @@ pim_mroute_msg_nocache (int fd, struct interface *ifp, const struct igmpmsg *msg
       (!pim_ifp) ||
       (!(PIM_I_am_DR(pim_ifp))) ||
       (pim_ifp->itype == PIM_INTERFACE_SSM))
-    return 0;
+    {
+      if (PIM_DEBUG_MROUTE_DETAIL)
+	zlog_debug ("%s: Interface is not configured correctly to handle incoming packet: Could be !DR, !pim_ifp, !SM, !RP",
+		    __PRETTY_FUNCTION__);
+      return 0;
+    }
 
   /*
    * If we've received a multicast packet that isn't connected to