Bring over a tool to create and destroy wtap instances.

Submitted by:	Monthadar Al Jaberi <monthadar@gmail.com>

tools/tools/wtap/wtap/Makefile

@@ -0,0 +1,9 @@
+# $FreeBSD$
+
+PROG=	wtap
+SRC=	wtap.c
+NO_MAN=	1
+
+CFLAGS+=	-I${.CURDIR}/../../../../sys/dev/wtap/
+
+.include <bsd.prog.mk>

tools/tools/wtap/wtap/wtap.c

@@ -0,0 +1,82 @@
+/*-
+ * Copyright (c) 2010-2011 Monthadar Al Jaberi, TerraNet AB
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
+ *    redistribution must be conditioned upon including a substantially
+ *    similar Disclaimer requirement for further binary redistribution.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
+ * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+ * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGES.
+ *
+ * $FreeBSD$
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+
+#include "if_wtapioctl.h"
+
+static int dev = -1;
+
+static void create(int id)
+{
+    if(ioctl(dev, WTAPIOCTLCRT, &id) < 0){
+	printf("error creating wtap with id=%d\n", id);
+    }
+}
+
+static void delete(int id)
+{
+    if(ioctl(dev, WTAPIOCTLDEL, &id) < 0){
+	printf("error deleting wtap with id=%d\n", id);
+    }
+}
+
+int main( int argc, const char* argv[])
+{
+    if(argc != 3){
+      printf("usage: %s [c | d] wtap_id\n", argv[0]);
+      return -1;
+    }
+    int id = atoi(argv[2]);
+    if(!(id >= 0 && id < 64)){
+	printf("wtap_id must be between 0 and 7\n");
+	return -1;
+    }
+    dev = open("/dev/wtapctl", O_RDONLY);
+    if(dev < 0){
+      printf("error opening wtapctl cdev\n");
+      return -1;
+    }
+    switch((char)*argv[1]){
+      case 'c':
+	create(id);
+	break;
+      case 'd':
+	delete(id);
+	break;
+      default:
+	printf("wtap ioctl: unkown command '%c'\n", *argv[1]);
+	return -1;
+    }
+    return 0;
+}