if_tun.h

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    1 /*      $NetBSD: if_tun.h,v 1.22 2022/03/13 21:32:43 riastradh 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 its wicked way with. This driver has its
   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 #include <sys/ioccom.h>
   23 
   24 #ifdef _KERNEL
   25 
   26 #include <sys/types.h>
   27 
   28 #include <sys/condvar.h>
   29 #include <sys/mutex.h>
   30 #include <sys/queue.h>
   31 #include <sys/select.h>
   32 
   33 #include <net/if.h>
   34 
   35 struct tun_softc {
   36         struct  ifnet tun_if;           /* the interface */
   37 
   38         u_short tun_flags;              /* misc flags */
   39 #define TUN_OPEN        0x0001
   40 #define TUN_INITED      0x0002
   41 #define TUN_RCOLL       0x0004
   42 #define TUN_IASET       0x0008
   43 #define TUN_DSTADDR     0x0010
   44 #define TUN_UNUSED0     0x0040  /* was TUN_RWAIT */
   45 #define TUN_ASYNC       0x0080
   46 #define TUN_NBIO        0x0100
   47 #define TUN_PREPADDR    0x0200
   48 #define TUN_IFHEAD      0x0400
   49 
   50 #define TUN_READY       (TUN_OPEN | TUN_INITED | TUN_IASET)
   51 
   52         pid_t   tun_pgid;               /* PID or process group ID */
   53         struct  selinfo tun_rsel;       /* read select */
   54         struct  selinfo tun_wsel;       /* write select (not used) */
   55         int     tun_unit;               /* the tunnel unit number */
   56         kmutex_t tun_lock;              /* lock for this tunnel */
   57         kcondvar_t tun_cv;              /* condition variable for tunnel */
   58         LIST_ENTRY(tun_softc) tun_list; /* list of all tuns */
   59         void    *tun_osih;              /* soft interrupt handle */
   60         void    *tun_isih;              /* soft interrupt handle */
   61 };
   62 #endif  /* _KERNEL */
   63 
   64 /* Maximum packet size */
   65 #define TUNMTU          1500
   66 
   67 /* ioctl's for get/set debug */
   68 #define TUNSDEBUG       _IOW('t', 90, int)
   69 #define TUNGDEBUG       _IOR('t', 89, int)
   70 #define TUNSIFMODE      _IOW('t', 88, int)
   71 #define TUNSLMODE       _IOW('t', 87, int)
   72 #define TUNSIFHEAD      _IOW('t', 66, int)
   73 #define TUNGIFHEAD      _IOR('t', 65, int)
   74 
   75 #endif /* !_NET_IF_TUN_H_ */

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FreeBSD/Linux Kernel Cross Reference sys/net/if_tun.h

FreeBSD/Linux Kernel Cross Reference
sys/net/if_tun.h