$OpenBSD: patch-vl_c,v 1.1.1.1 2005/03/07 16:41:28 todd Exp $
--- vl.c.orig	Thu Feb 10 16:00:06 2005
+++ vl.c	Tue Mar  1 15:53:26 2005
@@ -42,7 +42,7 @@
 #include <dirent.h>
 #ifdef _BSD
 #include <sys/stat.h>
-#ifndef __APPLE__
+#if !defined(__APPLE__) && !defined(__OpenBSD__)
 #include <libutil.h>
 #endif
 #else
@@ -1574,11 +1574,34 @@ static int tun_open(char *ifname, int if
     char *dev;
     struct stat s;
 
+#ifdef __OpenBSD__
+    int i = 0, enoentcount = 0, err = 0;
+    char dname[100];
+
+    for (; i < 10; i++) {
+	snprintf(dname, sizeof dname, "%s%d", "/dev/tun", i);
+	fd = open(dname, O_RDWR);
+	if (fd >= 0)
+	    break;
+	else if (errno != ENOENT || ++enoentcount > 3) {
+		if (errno != EBUSY) {
+	    	    err = errno;
+	    	    break;
+		}
+	} else
+	    err = errno;
+    }
+    if (fd < 0) {
+        fprintf(stderr, "warning: could not open %s (%s): no virtual network emulation\n", dname, strerror(err));
+        return -1;
+    }
+#else
     fd = open("/dev/tap", O_RDWR);
     if (fd < 0) {
         fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n");
         return -1;
     }
+#endif
 
     fstat(fd, &s);
     dev = devname(s.st_rdev, S_IFCHR);