bgpd: Install SAFI_LABELED_UNICAST routes in SAFI_UNICAST table

Signed-off-by: Daniel Walton <dwalton@cumulusnetworks.com>

- All ipv4 labeled-unicast routes are now installed in the ipv4 unicast
  table. This allows us to do things like take routes from an ipv4
  unicast peer, allocate a label for them and TX them to a ipv4
  labeled-unicast peer. We can do the opposite where we take routes from
  a labeled-unicast peer, remove the label and advertise them to an ipv4
  unicast peer.

- Multipath over a labeled route and non-labeled route is not allowed.

- You cannot activate a peer for both 'ipv4 unicast' and 'ipv4
  labeled-unicast'

- The 'tag' variable was overloaded for zebra's route tag feature as
  well as the mpls label. I added a 'mpls_label_t mpls' variable to
  avoid this.  This is much cleaner but resulted in touching a lot of
  code.

1 files changed, 5 insertions, 4 deletions

diff --git a/lib/stream.c b/lib/stream.c
index e8320a8fa1..6163a5b3ec 100644
--- a/lib/stream.c
+++ b/lib/stream.c
@@ -920,9 +920,10 @@ stream_put_prefix (struct stream *s, struct prefix *p)
 
 /* Put NLRI with label */
 int
-stream_put_labeled_prefix (struct stream *s, struct prefix *p, u_char *label)
+stream_put_labeled_prefix (struct stream *s, struct prefix *p, mpls_label_t *label)
 {
   size_t psize;
+  u_char *label_pnt = (u_char *) label;
 
   STREAM_VERIFY_SANE(s);
 
@@ -935,9 +936,9 @@ stream_put_labeled_prefix (struct stream *s, struct prefix *p, u_char *label)
     }
 
   stream_putc (s, (p->prefixlen + 24));
-  stream_putc(s, label[0]);
-  stream_putc(s, label[1]);
-  stream_putc(s, label[2]);
+  stream_putc(s, label_pnt[0]);
+  stream_putc(s, label_pnt[1]);
+  stream_putc(s, label_pnt[2]);
   memcpy (s->data + s->endp, &p->u.prefix, psize);
   s->endp += psize;