Author: melifaro
Date: Tue Apr 29 16:51:28 2014
New Revision: 265096
URL: http://svnweb.freebsd.org/changeset/base/265096

Log:
  Fix "netstat -gW" behavior broken in r259638.
  netstat has two options for printing multicast tables:
  sysctl (the default one for live systems) and kvm-based one (for cores).
  It looks like kvm-based one hasn't been working since it's been introduced
  in r190012 due to absence of mfctablesize kernel symbol.
  Check for all ipv4-multicast symbols being correctly resolved was introduced
  in r259638 regardless of 'live' value leading to "No IPv4 MROUTING" error
  message.
  
  Reported by:  Olivier Cochard-Labbé
  MFC after:    1 week

Modified:
  head/usr.bin/netstat/mroute.c

Modified: head/usr.bin/netstat/mroute.c
==============================================================================
--- head/usr.bin/netstat/mroute.c       Tue Apr 29 15:25:57 2014        
(r265095)
+++ head/usr.bin/netstat/mroute.c       Tue Apr 29 16:51:28 2014        
(r265096)
@@ -236,16 +236,7 @@ mroutepr()
         * functionality was deprecated, as PIM does not use it.
         */
        maxvif = 0;
-
-       kresolve_list(mrl);
-       pmfchashtbl = mrl[N_MFCHASHTBL].n_value;
-       pmfctablesize = mrl[N_MFCTABLESIZE].n_value;
-       pviftbl = mrl[N_VIFTABLE].n_value;
-
-       if (pmfchashtbl == 0 || pmfctablesize == 0 || pviftbl == 0) {
-               fprintf(stderr, "No IPv4 MROUTING kernel support.\n");
-               return;
-       }
+       pmfchashtbl = pmfctablesize = pviftbl = 0;
 
        len = sizeof(viftable);
        if (live) {
@@ -254,8 +245,19 @@ mroutepr()
                        warn("sysctl: net.inet.ip.viftable");
                        return;
                }
-       } else
+       } else {
+               kresolve_list(mrl);
+               pmfchashtbl = mrl[N_MFCHASHTBL].n_value;
+               pmfctablesize = mrl[N_MFCTABLESIZE].n_value;
+               pviftbl = mrl[N_VIFTABLE].n_value;
+
+               if (pmfchashtbl == 0 || pmfctablesize == 0 || pviftbl == 0) {
+                       fprintf(stderr, "No IPv4 MROUTING kernel support.\n");
+                       return;
+               }
+
                kread(pviftbl, (char *)viftable, sizeof(viftable));
+       }
 
        banner_printed = 0;
        for (vifi = 0, v = viftable; vifi < MAXVIFS; ++vifi, ++v) {
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