Undo possible damage done by the new TUNSIFMODE ioctl

in FreeBSD-current.

usr.sbin/ppp/bundle.c

@@ -23,13 +23,14 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *	$Id: bundle.c,v 1.48 1999/03/04 17:42:14 brian Exp $
+ *	$Id: bundle.c,v 1.49 1999/03/07 01:41:40 brian Exp $
  */
 
 #include <sys/param.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <net/if.h>
+#include <net/if_tun.h>
 #include <arpa/inet.h>
 #include <net/route.h>
 #include <netinet/in_systm.h>
@@ -739,6 +740,9 @@ bundle_Create(const char *prefix, int type, const char **argv)
   const char *ifname;
   struct ifreq ifrq;
   static struct bundle bundle;		/* there can be only one */
+#ifdef TUNSIFMODE
+  int iff;
+#endif
 
   if (bundle.iface != NULL) {	/* Already allocated ! */
     log_Printf(LogALERT, "bundle_Create:  There's only one BUNDLE !\n");
@@ -794,6 +798,14 @@ bundle_Create(const char *prefix, int type, const char **argv)
     return NULL;
   }
 
+#ifdef TUNSIFMODE
+  /* Make sure we're POINTOPOINT */
+  iff = IFF_POINTOPOINT;
+  if (ID0ioctl(bundle.dev.fd, TUNSIFMODE, &iff) < 0)
+    log_Printf(LogERROR, "bundle_Create: ioctl(TUNSIFMODE): %s\n",
+	       strerror(errno));
+#endif
+
   /*
    * Now, bring up the interface.
    */