From 38f4721092f5a835248f9f521d34990ec9883dbd Mon Sep 17 00:00:00 2001
From: "Ondrej Zajicek (work)" <santiago@crfreenet.org>
Date: Fri, 13 Oct 2017 19:34:34 +0200
Subject: [PATCH] Babel: Avoid batch seqno updates

---
 proto/babel/babel.c | 11 +++++++++--
 proto/babel/babel.h |  1 +
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/proto/babel/babel.c b/proto/babel/babel.c
index 10974474..54b31c22 100644
--- a/proto/babel/babel.c
+++ b/proto/babel/babel.c
@@ -760,6 +760,13 @@ babel_send_update_(struct babel_iface *ifa, btime changed, struct fib *rtable)
 {
   struct babel_proto *p = ifa->proto;
 
+  /* Update increase was requested */
+  if (p->update_seqno_inc)
+  {
+    p->update_seqno++;
+    p->update_seqno_inc = 0;
+  }
+
   FIB_WALK(rtable, struct babel_entry, e)
   {
     struct babel_route *r = e->selected_out;
@@ -1299,8 +1306,8 @@ babel_handle_seqno_request(union babel_msg *m, struct babel_iface *ifa)
   /* Seqno is larger; check if we own the router id */
   if (msg->router_id == p->router_id)
   {
-    /* Ours; update seqno and trigger global update */
-    p->update_seqno++;
+    /* Ours; seqno increase and trigger global update */
+    p->update_seqno_inc = 1;
     babel_trigger_update(p);
   }
   else
diff --git a/proto/babel/babel.h b/proto/babel/babel.h
index 1b857f09..d0c159f9 100644
--- a/proto/babel/babel.h
+++ b/proto/babel/babel.h
@@ -139,6 +139,7 @@ struct babel_proto {
   list interfaces;			/* Interfaces we really know about (struct babel_iface) */
   u64 router_id;
   u16 update_seqno;			/* To be increased on request */
+  u8 update_seqno_inc;			/* Request for update_seqno increase */
   u8 triggered;				/* For triggering global updates */
 
   slab *route_slab;