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/* 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);
#include <crypto/siphash/siphash.h>
typedef struct {
uint64_t k0;
uint64_t k1;
} SIPHASH_KEY;
static inline uint64_t
siphash24(const SIPHASH_KEY *key, const void *src, size_t len)
{
SIPHASH_CTX ctx;
return (SipHashX(&ctx, 2, 4, (const uint8_t *)key, src, len));
}
#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);
}
#endif
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