mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-22 20:23:57 +08:00
e3b9955697
Add a TUNGETIFF interface so that userspace can query a tun/tap descriptor for its name and flags. This is needed because it is common for one app to create a tap interface, exec another app and pass it the file descriptor for the interface. Without TUNGETIFF the spawned app has no way of detecting wheter the interface has e.g. IFF_VNET_HDR set. Signed-off-by: Mark McLoughlin <markmc@redhat.com> Acked-by: Max Krasnyansky <maxk@qualcomm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
86 lines
2.7 KiB
C
86 lines
2.7 KiB
C
/*
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef __IF_TUN_H
|
|
#define __IF_TUN_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/if_ether.h>
|
|
|
|
/* Read queue size */
|
|
#define TUN_READQ_SIZE 500
|
|
|
|
/* 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_ONE_QUEUE 0x0080
|
|
#define TUN_PERSIST 0x0100
|
|
#define TUN_VNET_HDR 0x0200
|
|
|
|
/* Ioctl defines */
|
|
#define TUNSETNOCSUM _IOW('T', 200, int)
|
|
#define TUNSETDEBUG _IOW('T', 201, int)
|
|
#define TUNSETIFF _IOW('T', 202, int)
|
|
#define TUNSETPERSIST _IOW('T', 203, int)
|
|
#define TUNSETOWNER _IOW('T', 204, int)
|
|
#define TUNSETLINK _IOW('T', 205, int)
|
|
#define TUNSETGROUP _IOW('T', 206, int)
|
|
#define TUNGETFEATURES _IOR('T', 207, unsigned int)
|
|
#define TUNSETOFFLOAD _IOW('T', 208, unsigned int)
|
|
#define TUNSETTXFILTER _IOW('T', 209, unsigned int)
|
|
#define TUNGETIFF _IOR('T', 210, unsigned int)
|
|
|
|
/* TUNSETIFF ifr flags */
|
|
#define IFF_TUN 0x0001
|
|
#define IFF_TAP 0x0002
|
|
#define IFF_NO_PI 0x1000
|
|
#define IFF_ONE_QUEUE 0x2000
|
|
#define IFF_VNET_HDR 0x4000
|
|
|
|
/* Features for GSO (TUNSETOFFLOAD). */
|
|
#define TUN_F_CSUM 0x01 /* You can hand me unchecksummed packets. */
|
|
#define TUN_F_TSO4 0x02 /* I can handle TSO for IPv4 packets */
|
|
#define TUN_F_TSO6 0x04 /* I can handle TSO for IPv6 packets */
|
|
#define TUN_F_TSO_ECN 0x08 /* I can handle TSO with ECN bits. */
|
|
|
|
/* Protocol info prepended to the packets (when IFF_NO_PI is not set) */
|
|
#define TUN_PKT_STRIP 0x0001
|
|
struct tun_pi {
|
|
__u16 flags;
|
|
__be16 proto;
|
|
};
|
|
|
|
/*
|
|
* Filter spec (used for SETXXFILTER ioctls)
|
|
* This stuff is applicable only to the TAP (Ethernet) devices.
|
|
* If the count is zero the filter is disabled and the driver accepts
|
|
* all packets (promisc mode).
|
|
* If the filter is enabled in order to accept broadcast packets
|
|
* broadcast addr must be explicitly included in the addr list.
|
|
*/
|
|
#define TUN_FLT_ALLMULTI 0x0001 /* Accept all multicast packets */
|
|
struct tun_filter {
|
|
__u16 flags; /* TUN_FLT_ flags see above */
|
|
__u16 count; /* Number of addresses */
|
|
__u8 addr[0][ETH_ALEN];
|
|
};
|
|
|
|
#endif /* __IF_TUN_H */
|