Import release 0.04

[secnet.git] / linux / if_tun.h

diff --git a/linux/if_tun.h b/linux/if_tun.h
new file mode 100644 (file)
index 0000000..fd610f3
--- /dev/null
+++ b/linux/if_tun.h
@@ -0,0 +1,92 @@
+/*
+ *  Universal TUN/TAP device driver.
+ *  Copyright (C) 1999-2000 Maxim Krasnyansky <max_mk@yahoo.com>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *  GNU General Public License for more details.
+ *
+ *  $Id: if_tun.h,v 1.5 2000/10/24 05:13:08 maxk Exp $
+ */
+
+#ifndef __IF_TUN_H
+#define __IF_TUN_H
+
+/* Uncomment to enable debugging */
+/* #define TUN_DEBUG 1 */
+
+#ifdef __KERNEL__
+
+#ifdef TUN_DEBUG
+#define DBG  if(tun->debug)printk
+#define DBG1 if(debug==2)printk
+#else
+#define DBG( a... )
+#define DBG1( a... )
+#endif
+
+struct tun_struct {
+       char                    name[8];
+       unsigned long           flags;
+
+       struct fasync_struct    *fasync;
+       wait_queue_head_t       read_wait;
+
+       struct net_device       dev;
+       struct sk_buff_head     txq;
+        struct net_device_stats        stats;
+
+#ifdef TUN_DEBUG       
+       int debug;
+#endif  
+};
+
+#ifndef MIN
+#define MIN(a,b) ( (a)<(b) ? (a):(b) ) 
+#endif
+
+#endif /* __KERNEL__ */
+
+/* Number of devices */
+#define TUN_MAX_DEV    255
+
+/* TX queue size */
+#define TUN_TXQ_SIZE   10
+
+/* Max frame size */
+#define TUN_MAX_FRAME  4096
+
+/* TUN device flags */
+#define TUN_TUN_DEV    0x0001  
+#define TUN_TAP_DEV    0x0002
+#define TUN_TYPE_MASK   0x000f
+
+#define TUN_FASYNC     0x0010
+#define TUN_NOCHECKSUM 0x0020
+#define TUN_NO_PI      0x0040
+
+#define TUN_IFF_SET    0x1000
+
+/* Ioctl defines */
+#define TUNSETNOCSUM (('T'<< 8) | 200) 
+#define TUNSETDEBUG  (('T'<< 8) | 201) 
+#define TUNSETIFF    (('T'<< 8) | 202) 
+
+/* TUNSETIFF ifr flags */
+#define IFF_TUN                0x0001
+#define IFF_TAP                0x0002
+#define IFF_NO_PI      0x1000
+
+struct tun_pi {
+   unsigned short flags;
+   unsigned short proto;
+};
+#define TUN_PKT_STRIP  0x0001
+
+#endif /* __IF_TUN_H */