blob: 041ffc3d8661c1c9ed9917c2f43ec1aed7f726e7 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
/* SPDX-License-Identifier: ISC
*
* Copyright (C) 2021 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
* Copyright (C) 2021 Matt Dunwoodie <ncon@noconroy.net>
*
* support.h contains functions that are either not _yet_ upstream in FreeBSD 14, or are shimmed
* from OpenBSD. It is different from compat.h, which is strictly for backports.
*/
#ifndef _WG_SUPPORT
#define _WG_SUPPORT
#include <sys/types.h>
#include <sys/limits.h>
#include <sys/endian.h>
#include <sys/socket.h>
#include <sys/libkern.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/lock.h>
#include <sys/socketvar.h>
#include <sys/protosw.h>
#include <net/vnet.h>
#include <vm/uma.h>
/* TODO the following is openbsd compat defines to allow us to copy the wg_*
* files from openbsd (almost) verbatim. this will greatly increase maintenance
* across the platforms. it should be moved to it's own file. the only thing
* we're missing from this is struct pool (freebsd: uma_zone_t), which isn't a
* show stopper, but is something worth considering in the future.
* - md */
#define rw_assert_wrlock(x) rw_assert(x, RA_WLOCKED)
#define rw_enter_write rw_wlock
#define rw_exit_write rw_wunlock
#define rw_enter_read rw_rlock
#define rw_exit_read rw_runlock
#define rw_exit rw_unlock
#define RW_DOWNGRADE 1
#define rw_enter(x, y) do { \
CTASSERT(y == RW_DOWNGRADE); \
rw_downgrade(x); \
} while (0)
MALLOC_DECLARE(M_WG);
#ifndef ARRAY_SIZE
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
#endif
#ifndef PRIV_NET_WG
#define PRIV_NET_WG PRIV_NET_HWIOCTL
#endif
#ifndef IFT_WIREGUARD
#define IFT_WIREGUARD IFT_PPP
#endif
static inline int
sogetsockaddr(struct socket *so, struct sockaddr **nam)
{
int error;
CURVNET_SET(so->so_vnet);
error = (*so->so_proto->pr_usrreqs->pru_sockaddr)(so, nam);
CURVNET_RESTORE();
return (error);
}
/* These are defined in sys/compat/linuxkpi/common/include/linux/compiler.h,
* however I don't really want to include all that. */
#define barrier() __asm__ __volatile__("": : :"memory")
#define ACCESS_ONCE(x) (*(volatile __typeof(x) *)&(x))
#define WRITE_ONCE(x,v) do { \
barrier(); \
ACCESS_ONCE(x) = (v); \
barrier(); \
} while (0)
#define READ_ONCE(x) ({ \
__typeof(x) __var = ({ \
barrier(); \
ACCESS_ONCE(x); \
}); \
barrier(); \
__var; \
})
#endif
|
