Nest: Fix leaking internal attributes in RIP and Babel

During backporting attribute changes from 3.0-branch, some internal
attributes (RIP iface and Babel seqno) leaked to 'show route all' output.
Allow protocols to hide specific attributes with GA_HIDDEN value.

Thanks to Nigel Kukard for the bugreport.

1 files changed, 3 insertions, 0 deletions

diff --git a/proto/rip/rip.c b/proto/rip/rip.c
index b0b5b8a1..5f3161ee 100644
--- a/proto/rip/rip.c
+++ b/proto/rip/rip.c
@@ -1233,6 +1233,9 @@ rip_get_attr(const eattr *a, byte *buf, int buflen UNUSED)
     bsprintf(buf, "tag: %04x", a->u.data);
     return GA_FULL;
 
+  case EA_RIP_FROM:
+    return GA_HIDDEN;
+
   default:
     return GA_UNKNOWN;
   }