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_ */ 76