[bgpd] Fix triggerable crash when compiled with --disable-bgp-announce

2008-07-22 Paul Jakma <paul.jakma@sun.com>

	* HACKING: Document preference for compiler conditional code, over
	  cpp conditional.
	* configure.ac: DISABLE_BGP_ANNOUNCE always should be defined.
	* bgp_{packet,route,advertise}.c: change to compiler testing of
	  DISABLE_BGP_ANNOUNCE, rather than cpp.

2008-07-22 MIYAJIMA Mitsuharu <miyajima.mitsuharu@anchor.jp>

	* bgp_packet.c: (bgp_update_packet_eor) Fix crash triggerable
	  if a bgpd was compiled with --disable-bgp-announce and if GR is
	  advertised by peer.
diff --git a/bgpd/bgp_route.c b/bgpd/bgp_route.c
index 4fbc4ba..b639db0 100644
--- a/bgpd/bgp_route.c
+++ b/bgpd/bgp_route.c
@@ -742,9 +742,8 @@
   filter = &peer->filter[afi][safi];
   bgp = peer->bgp;
   
-#ifdef DISABLE_BGP_ANNOUNCE
-  return 0;
-#endif
+  if (DISABLE_BGP_ANNOUNCE)
+    return 0;
 
   /* Do not send announces to RS-clients from the 'normal' bgp_table. */
   if (CHECK_FLAG(peer->af_flags[afi][safi], PEER_FLAG_RSERVER_CLIENT))
@@ -1095,9 +1094,8 @@
   filter = &rsclient->filter[afi][safi];
   bgp = rsclient->bgp;
 
-#ifdef DISABLE_BGP_ANNOUNCE
-  return 0;
-#endif
+  if (DISABLE_BGP_ANNOUNCE)
+    return 0;
 
   /* Do not send back route to sender. */
   if (from == rsclient)