From fae6670fd24e13d70134df22ca8ab6c0109cdf0e Mon Sep 17 00:00:00 2001
From: brian <brian@openbsd.org>
Date: Thu, 6 Apr 2000 10:09:57 +0000
Subject: [PATCH] I didn't get this right the last time....

When an NCP reaches TLF, *ONLY* datalink_Close() links that are
in DATALINK_OPEN.

When the last link reaches TLD, DOWN all NCPs (as we used to in the
links TLF (which was the wrong place anyway)), as the NCPs aren't
now going to datalink_Close() us unexpectedly, we get to continue
doing what we were told to do in the first place.

The result:  When we lose a link, the IPCP layer goes down and
we actually call the stuff in ppp.linkdown !
---
 usr.sbin/ppp/ppp/bundle.c | 35 +++++++++++++++++++++--------------
 1 file changed, 21 insertions(+), 14 deletions(-)

diff --git a/usr.sbin/ppp/ppp/bundle.c b/usr.sbin/ppp/ppp/bundle.c
index 8089d61544a..566e5c5cd22 100644
--- a/usr.sbin/ppp/ppp/bundle.c
+++ b/usr.sbin/ppp/ppp/bundle.c
@@ -23,7 +23,7 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *	$OpenBSD: bundle.c,v 1.34 2000/04/02 01:36:24 brian Exp $
+ *	$OpenBSD: bundle.c,v 1.35 2000/04/06 10:09:57 brian Exp $
  */
 
 #include <sys/param.h>
@@ -273,6 +273,7 @@ bundle_LayerDown(void *v, struct fsm *fp)
    * If it's our last NCP, stop the autoload timer
    * If it's an LCP, adjust our phys_type.open value and any timers.
    * If it's an LCP and we're in multilink mode, adjust our tun
+   * If it's the last LCP, down all NCPs
    * speed and make sure our minimum sequence number is adjusted.
    */
 
@@ -283,16 +284,22 @@ bundle_LayerDown(void *v, struct fsm *fp)
     bundle->upat = 0;
     mp_StopAutoloadTimer(&bundle->ncp.mp);
   } else if (fp->proto == PROTO_LCP) {
+    struct datalink *dl;
+    struct datalink *lost;
+    int others_active;
+
     bundle_LinksRemoved(bundle);  /* adjust timers & phys_type values */
-    if (bundle->ncp.mp.active) {
-      struct datalink *dl;
-      struct datalink *lost;
 
-      lost = NULL;
-      for (dl = bundle->links; dl; dl = dl->next)
-        if (fp == &dl->physical->link.lcp.fsm)
-          lost = dl;
+    lost = NULL;
+    others_active = 0;
+    for (dl = bundle->links; dl; dl = dl->next) {
+      if (fp == &dl->physical->link.lcp.fsm)
+        lost = dl;
+      else if (dl->state != DATALINK_CLOSED && dl->state != DATALINK_HANGUP)
+        others_active++;
+    }
 
+    if (bundle->ncp.mp.active) {
       bundle_CalculateBandwidth(bundle);
 
       if (lost)
@@ -301,6 +308,10 @@ bundle_LayerDown(void *v, struct fsm *fp)
         log_Printf(LogALERT, "Oops, lost an unrecognised datalink (%s) !\n",
                    fp->link->name);
     }
+
+    if (!others_active)
+      /* Down the NCPs.  We don't expect to get fsm_Close()d ourself ! */
+      fsm2initial(&bundle->ncp.ipcp.fsm);
   }
 }
 
@@ -319,14 +330,10 @@ bundle_LayerFinish(void *v, struct fsm *fp)
     if (bundle_Phase(bundle) != PHASE_DEAD)
       bundle_NewPhase(bundle, PHASE_TERMINATE);
     for (dl = bundle->links; dl; dl = dl->next)
-      datalink_Close(dl, CLOSE_STAYDOWN);
+      if (dl->state == DATALINK_OPEN)
+        datalink_Close(dl, CLOSE_STAYDOWN);
     fsm2initial(fp);
   }
-  /*
-   * If it's an LCP, don't try to murder any NCPs, let bundle_LinkClosed()
-   * do that side of things (at a time when a call to fsm2initial() on the
-   * NCP isn't going to take charge of bringing down this link).
-   */
 }
 
 int
-- 
2.20.1