From 62d3f846e6340ce7ad8d44714b7c480abb92f2f7 Mon Sep 17 00:00:00 2001
From: Lorenzo Cogotti <lcg@inventati.org>
Date: Fri, 15 Oct 2021 12:04:42 +0200
Subject: [PATCH] [lonetix/bgp] Add quick access functions for BGP UPDATE
 fields

---
 lonetix/include/df/bgp/bgp.h | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/lonetix/include/df/bgp/bgp.h b/lonetix/include/df/bgp/bgp.h
index a25c278..54838ea 100755
--- a/lonetix/include/df/bgp/bgp.h
+++ b/lonetix/include/df/bgp/bgp.h
@@ -559,6 +559,23 @@ typedef ALIGNED(1, struct) {
 	Uint8  attrs[FLEX_ARRAY];
 } Bgpattrseg;
 
+FORCE_INLINE Bgpwithdrawnseg *BGP_WITHDRAWN(const Bgpupdate *msg)
+{
+	return (Bgpwithdrawnseg *) msg->data;
+}
+
+FORCE_INLINE Bgpattrseg *BGP_ATTRIBUTES(const Bgpupdate *msg)
+{
+	const Bgpwithdrawnseg *w = BGP_WITHDRAWN(msg);
+	return (Bgpattrseg *) (w->nlri + BE16(w->len));
+}
+
+FORCE_INLINE void *BGP_ANNOUNCEMENTS(const Bgpupdate *msg)
+{
+	const Bgpattrseg *tpa = BGP_ATTRIBUTES(msg);
+	return (void *) (tpa->attrs + BE16(tpa->len));
+}
+
 // NOTE: NLRI segment is handled with no struct
 
 /// Attribute length has an additional byte.