sys/net/if_tun.h

   1 /*      $NetBSD: if_tun.h,v 1.15 2006/04/04 11:23:59 rpaulo Exp $       */
   2
   3 /*
   4  * Copyright (c) 1988, Julian Onions <jpo@cs.nott.ac.uk>
   5  * Nottingham University 1987.
   6  *
   7  * This source may be freely distributed, however I would be interested
   8  * in any changes that are made.
   9  *
  10  * This driver takes packets off the IP i/f and hands them up to a
  11  * user process to have it's wicked way with. This driver has it's
  12  * roots in a similar driver written by Phil Cockcroft (formerly) at
  13  * UCL. This driver is based much more on read/write/select mode of
  14  * operation though.
  15  *
  16  * from: Header: if_tnreg.h,v 1.1.2.1 1992/07/16 22:39:16 friedl Exp
  17  */
  18
  19 #ifndef _NET_IF_TUN_H_
  20 #define _NET_IF_TUN_H_
  21
  22 #ifdef _KERNEL
  23 struct tun_softc {
  24         struct  ifnet tun_if;           /* the interface */
  25
  26         u_short tun_flags;              /* misc flags */
  27 #define TUN_OPEN        0x0001
  28 #define TUN_INITED      0x0002
  29 #define TUN_RCOLL       0x0004
  30 #define TUN_IASET       0x0008
  31 #define TUN_DSTADDR     0x0010
  32 #define TUN_RWAIT       0x0040
  33 #define TUN_ASYNC       0x0080
  34 #define TUN_NBIO        0x0100
  35 #define TUN_PREPADDR    0x0200
  36 #define TUN_IFHEAD      0x0400
  37
  38 #define TUN_READY       (TUN_OPEN | TUN_INITED | TUN_IASET)
  39
  40         pid_t   tun_pgid;               /* PID or process group ID */
  41         struct  selinfo tun_rsel;       /* read select */
  42         struct  selinfo tun_wsel;       /* write select (not used) */
  43         int     tun_unit;               /* the tunnel unit number */
  44         struct  simplelock tun_lock;    /* lock for this tunnel */
  45         LIST_ENTRY(tun_softc) tun_list; /* list of all tuns */
  46         void    *tun_osih;              /* soft interrupt handle */
  47         void    *tun_isih;              /* soft interrupt handle */
  48 };
  49 #endif  /* _KERNEL */
  50
  51 /* Maximum packet size */
  52 #define TUNMTU          1500
  53
  54 /* ioctl's for get/set debug */
  55 #define TUNSDEBUG       _IOW('t', 90, int)
  56 #define TUNGDEBUG       _IOR('t', 89, int)
  57 #define TUNSIFMODE      _IOW('t', 88, int)
  58 #define TUNSLMODE       _IOW('t', 87, int)
  59 #define TUNSIFHEAD      _IOW('t', 66, int)
  60 #define TUNGIFHEAD      _IOR('t', 65, int)
  61
  62 #endif /* !_NET_IF_TUN_H_ */