From 4faec4307043d4c9f17808813ef594ef88c1904d Mon Sep 17 00:00:00 2001
From: Brian Somers <brian@FreeBSD.org>
Date: Sat, 15 May 1999 02:24:18 +0000
Subject: [PATCH] Add ``show layers'' to see the protocol layering for a link.

---
 usr.sbin/ppp/command.c |  6 ++++--
 usr.sbin/ppp/link.c    | 18 +++++++++++++++++-
 usr.sbin/ppp/link.h    |  4 +++-
 3 files changed, 24 insertions(+), 4 deletions(-)

diff --git a/usr.sbin/ppp/command.c b/usr.sbin/ppp/command.c
index 159b148ad3e..c6b8d20168e 100644
--- a/usr.sbin/ppp/command.c
+++ b/usr.sbin/ppp/command.c
@@ -17,7 +17,7 @@
  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  *
- * $Id: command.c,v 1.192 1999/05/08 11:06:21 brian Exp $
+ * $Id: command.c,v 1.193 1999/05/12 09:48:44 brian Exp $
  *
  */
 #include <sys/param.h>
@@ -143,7 +143,7 @@
 #define NEG_DNS		52
 
 const char Version[] = "2.21";
-const char VersionDate[] = "$Date: 1999/05/08 11:06:21 $";
+const char VersionDate[] = "$Date: 1999/05/12 09:48:44 $";
 
 static int ShowCommand(struct cmdargs const *);
 static int TerminalCommand(struct cmdargs const *);
@@ -757,6 +757,8 @@ static struct cmdtab const ShowCommands[] = {
   "Interface status", "show iface"},
   {"ipcp", NULL, ipcp_Show, LOCAL_AUTH,
   "IPCP status", "show ipcp"},
+  {"layers", NULL, link_ShowLayers, LOCAL_AUTH | LOCAL_CX_OPT,
+  "Protocol layers", "show layers"},
   {"lcp", NULL, lcp_ReportStatus, LOCAL_AUTH | LOCAL_CX,
   "LCP status", "show lcp"},
   {"link", "datalink", datalink_Show, LOCAL_AUTH | LOCAL_CX,
diff --git a/usr.sbin/ppp/link.c b/usr.sbin/ppp/link.c
index 42c5e0cdd6b..9cc1d51dc40 100644
--- a/usr.sbin/ppp/link.c
+++ b/usr.sbin/ppp/link.c
@@ -23,7 +23,7 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *  $Id: link.c,v 1.9 1999/05/08 11:06:58 brian Exp $
+ *  $Id: link.c,v 1.10 1999/05/12 09:48:51 brian Exp $
  *
  */
 
@@ -64,6 +64,7 @@
 #include "pap.h"
 #include "chap.h"
 #include "cbcp.h"
+#include "command.h"
 
 static void Despatch(struct bundle *, struct link *, struct mbuf *, u_short);
 
@@ -339,3 +340,18 @@ Despatch(struct bundle *bundle, struct link *l, struct mbuf *bp, u_short proto)
     mbuf_Free(bp);
   }
 }
+
+int
+link_ShowLayers(struct cmdargs const *arg)
+{
+  struct link *l = command_ChooseLink(arg);
+  int layer;
+
+  for (layer = l->nlayers; layer; layer--)
+    prompt_Printf(arg->prompt, "%s%s", layer == l->nlayers ? "" : ", ",
+                  l->layer[layer - 1]->name);
+  if (l->nlayers)
+    prompt_Printf(arg->prompt, "\n");
+
+  return 0;
+}
diff --git a/usr.sbin/ppp/link.h b/usr.sbin/ppp/link.h
index 62250141aba..7c040830a0b 100644
--- a/usr.sbin/ppp/link.h
+++ b/usr.sbin/ppp/link.h
@@ -23,7 +23,7 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *  $Id: link.h,v 1.4 1998/08/25 17:48:42 brian Exp $
+ *  $Id: link.h,v 1.5 1999/05/08 11:07:00 brian Exp $
  *
  */
 
@@ -36,6 +36,7 @@
 
 struct bundle;
 struct prompt;
+struct cmdargs;
 
 struct link {
   int type;                               /* _LINK type */
@@ -73,3 +74,4 @@ extern void link_EmptyStack(struct link *);
 #define PROTO_OUT 2
 extern void link_ProtocolRecord(struct link *, u_short, int);
 extern void link_ReportProtocolStatus(struct link *, struct prompt *);
+extern int link_ShowLayers(struct cmdargs const *);