forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
72 lines
1.5 KiB
72 lines
1.5 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
|
/* |
|
* Universal TUN/TAP device driver. |
|
* Copyright (C) 1999-2000 Maxim Krasnyansky <[email protected]> |
|
*/ |
|
#ifndef __IF_TUN_H |
|
#define __IF_TUN_H |
|
|
|
#include <uapi/linux/if_tun.h> |
|
#include <uapi/linux/virtio_net.h> |
|
|
|
#define TUN_XDP_FLAG 0x1UL |
|
|
|
#define TUN_MSG_UBUF 1 |
|
#define TUN_MSG_PTR 2 |
|
struct tun_msg_ctl { |
|
unsigned short type; |
|
unsigned short num; |
|
void *ptr; |
|
}; |
|
|
|
struct tun_xdp_hdr { |
|
int buflen; |
|
struct virtio_net_hdr gso; |
|
}; |
|
|
|
#if defined(CONFIG_TUN) || defined(CONFIG_TUN_MODULE) |
|
struct socket *tun_get_socket(struct file *); |
|
struct ptr_ring *tun_get_tx_ring(struct file *file); |
|
static inline bool tun_is_xdp_frame(void *ptr) |
|
{ |
|
return (unsigned long)ptr & TUN_XDP_FLAG; |
|
} |
|
static inline void *tun_xdp_to_ptr(struct xdp_frame *xdp) |
|
{ |
|
return (void *)((unsigned long)xdp | TUN_XDP_FLAG); |
|
} |
|
static inline struct xdp_frame *tun_ptr_to_xdp(void *ptr) |
|
{ |
|
return (void *)((unsigned long)ptr & ~TUN_XDP_FLAG); |
|
} |
|
void tun_ptr_free(void *ptr); |
|
#else |
|
#include <linux/err.h> |
|
#include <linux/errno.h> |
|
struct file; |
|
struct socket; |
|
static inline struct socket *tun_get_socket(struct file *f) |
|
{ |
|
return ERR_PTR(-EINVAL); |
|
} |
|
static inline struct ptr_ring *tun_get_tx_ring(struct file *f) |
|
{ |
|
return ERR_PTR(-EINVAL); |
|
} |
|
static inline bool tun_is_xdp_frame(void *ptr) |
|
{ |
|
return false; |
|
} |
|
static inline void *tun_xdp_to_ptr(struct xdp_frame *xdp) |
|
{ |
|
return NULL; |
|
} |
|
static inline struct xdp_frame *tun_ptr_to_xdp(void *ptr) |
|
{ |
|
return NULL; |
|
} |
|
static inline void tun_ptr_free(void *ptr) |
|
{ |
|
} |
|
#endif /* CONFIG_TUN */ |
|
#endif /* __IF_TUN_H */
|
|
|