freebsd-skq/sys/net/if_tap.h

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (C) 1999-2000 by Maksim Yevmenkin <m_evmenkin@yahoo.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* BASED ON:
* -------------------------------------------------------------------------
*
* Copyright (c) 1988, Julian Onions <jpo@cs.nott.ac.uk>
* Nottingham University 1987.
*/
/*
* $FreeBSD$
* $Id: if_tap.h,v 0.7 2000/07/12 04:12:51 max Exp $
*/
#ifndef _NET_IF_TAP_H_
#define _NET_IF_TAP_H_
tun/tap: merge and rename to `tuntap` tun(4) and tap(4) share the same general management interface and have a lot in common. Bugs exist in tap(4) that have been fixed in tun(4), and vice-versa. Let's reduce the maintenance requirements by merging them together and using flags to differentiate between the three interface types (tun, tap, vmnet). This fixes a couple of tap(4)/vmnet(4) issues right out of the gate: - tap devices may no longer be destroyed while they're open [0] - VIMAGE issues already addressed in tun by kp [0] emaste had removed an easy-panic-button in r240938 due to devdrn blocking. A naive glance over this leads me to believe that this isn't quite complete -- destroy_devl will only block while executing d_* functions, but doesn't block the device from being destroyed while a process has it open. The latter is the intent of the condvar in tun, so this is "fixed" (for certain definitions of the word -- it wasn't really broken in tap, it just wasn't quite ideal). ifconfig(8) also grew the ability to map an interface name to a kld, so that `ifconfig {tun,tap}0` can continue to autoload the correct module, and `ifconfig vmnet0 create` will now autoload the correct module. This is a low overhead addition. (MFC commentary) This may get MFC'd if many bugs in tun(4)/tap(4) are discovered after this, and how critical they are. Changes after this are likely easily MFC'd without taking this merge, but the merge will be easier. I have no plans to do this MFC as of now. Reviewed by: bcr (manpages), tuexen (testing, syzkaller/packetdrill) Input also from: melifaro Relnotes: yes Differential Revision: https://reviews.freebsd.org/D20044
2019-05-08 02:32:11 +00:00
#include <net/if_tun.h>
/* maximum receive packet size (hard limit) */
#define TAPMRU 16384
tun/tap: merge and rename to `tuntap` tun(4) and tap(4) share the same general management interface and have a lot in common. Bugs exist in tap(4) that have been fixed in tun(4), and vice-versa. Let's reduce the maintenance requirements by merging them together and using flags to differentiate between the three interface types (tun, tap, vmnet). This fixes a couple of tap(4)/vmnet(4) issues right out of the gate: - tap devices may no longer be destroyed while they're open [0] - VIMAGE issues already addressed in tun by kp [0] emaste had removed an easy-panic-button in r240938 due to devdrn blocking. A naive glance over this leads me to believe that this isn't quite complete -- destroy_devl will only block while executing d_* functions, but doesn't block the device from being destroyed while a process has it open. The latter is the intent of the condvar in tun, so this is "fixed" (for certain definitions of the word -- it wasn't really broken in tap, it just wasn't quite ideal). ifconfig(8) also grew the ability to map an interface name to a kld, so that `ifconfig {tun,tap}0` can continue to autoload the correct module, and `ifconfig vmnet0 create` will now autoload the correct module. This is a low overhead addition. (MFC commentary) This may get MFC'd if many bugs in tun(4)/tap(4) are discovered after this, and how critical they are. Changes after this are likely easily MFC'd without taking this merge, but the merge will be easier. I have no plans to do this MFC as of now. Reviewed by: bcr (manpages), tuexen (testing, syzkaller/packetdrill) Input also from: melifaro Relnotes: yes Differential Revision: https://reviews.freebsd.org/D20044
2019-05-08 02:32:11 +00:00
#define tapinfo tuninfo
tun/tap: merge and rename to `tuntap` tun(4) and tap(4) share the same general management interface and have a lot in common. Bugs exist in tap(4) that have been fixed in tun(4), and vice-versa. Let's reduce the maintenance requirements by merging them together and using flags to differentiate between the three interface types (tun, tap, vmnet). This fixes a couple of tap(4)/vmnet(4) issues right out of the gate: - tap devices may no longer be destroyed while they're open [0] - VIMAGE issues already addressed in tun by kp [0] emaste had removed an easy-panic-button in r240938 due to devdrn blocking. A naive glance over this leads me to believe that this isn't quite complete -- destroy_devl will only block while executing d_* functions, but doesn't block the device from being destroyed while a process has it open. The latter is the intent of the condvar in tun, so this is "fixed" (for certain definitions of the word -- it wasn't really broken in tap, it just wasn't quite ideal). ifconfig(8) also grew the ability to map an interface name to a kld, so that `ifconfig {tun,tap}0` can continue to autoload the correct module, and `ifconfig vmnet0 create` will now autoload the correct module. This is a low overhead addition. (MFC commentary) This may get MFC'd if many bugs in tun(4)/tap(4) are discovered after this, and how critical they are. Changes after this are likely easily MFC'd without taking this merge, but the merge will be easier. I have no plans to do this MFC as of now. Reviewed by: bcr (manpages), tuexen (testing, syzkaller/packetdrill) Input also from: melifaro Relnotes: yes Differential Revision: https://reviews.freebsd.org/D20044
2019-05-08 02:32:11 +00:00
/*
* ioctl's for get/set debug; these are aliases of TUN* ioctls, see net/if_tun.h
* for details.
*/
#define TAPSDEBUG TUNSDEBUG
#define TAPGDEBUG TUNGDEBUG
#define TAPSIFINFO TUNSIFINFO
#define TAPGIFINFO TUNGIFINFO
#define TAPGIFNAME _IOR('t', 93, struct ifreq)
/* VMware ioctl's */
#define VMIO_SIOCSIFFLAGS _IOWINT('V', 0)
#define VMIO_SIOCSKEEP _IO('V', 1)
#define VMIO_SIOCSIFBR _IO('V', 2)
#define VMIO_SIOCSLADRF _IO('V', 3)
/* XXX -- unimplemented */
#define VMIO_SIOCSETMACADDR _IO('V', 4)
/* XXX -- not used? */
#define VMIO_SIOCPORT _IO('V', 5)
#define VMIO_SIOCBRIDGE _IO('V', 6)
#define VMIO_SIOCNETIF _IO('V', 7)
#endif /* !_NET_IF_TAP_H_ */