/* $FreeBSD$ */
/* $KAME: if_gif.h,v 1.17 2000/09/11 11:36:41 sumikawa Exp $ */
/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* Copyright (c) 2018 Andrey V. Elsukov <ae@FreeBSD.org>
* 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.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT 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 PROJECT 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.
*/
#ifndef _NET_IF_GIF_H_
#define _NET_IF_GIF_H_
#ifdef _KERNEL
struct ip;
struct ip6_hdr;
extern void (*ng_gif_input_p)(struct ifnet *ifp, struct mbuf **mp,
int af);
extern void (*ng_gif_input_orphan_p)(struct ifnet *ifp, struct mbuf *m,
int af);
extern int (*ng_gif_output_p)(struct ifnet *ifp, struct mbuf **mp);
extern void (*ng_gif_attach_p)(struct ifnet *ifp);
extern void (*ng_gif_detach_p)(struct ifnet *ifp);
struct gif_softc {
struct ifnet *gif_ifp;
int gif_family;
int gif_flags;
u_int gif_fibnum;
u_int gif_options;
void *gif_netgraph; /* netgraph node info */
union {
void *hdr;
struct ip *iphdr;
struct ip6_hdr *ip6hdr;
} gif_uhdr;
CK_LIST_ENTRY(gif_softc) chain;
CK_LIST_ENTRY(gif_softc) srchash;
};
CK_LIST_HEAD(gif_list, gif_softc);
MALLOC_DECLARE(M_GIF);
#ifndef GIF_HASH_SIZE
#define GIF_HASH_SIZE (1 << 4)
#endif
#define GIF2IFP(sc) ((sc)->gif_ifp)
#define gif_iphdr gif_uhdr.iphdr
#define gif_hdr gif_uhdr.hdr
#define gif_ip6hdr gif_uhdr.ip6hdr
#define GIF_MTU (1280) /* Default MTU */
#define GIF_MTU_MIN (1280) /* Minimum MTU */
#define GIF_MTU_MAX (8192) /* Maximum MTU */
struct etherip_header {
#if BYTE_ORDER == LITTLE_ENDIAN
u_int eip_resvl:4, /* reserved */
eip_ver:4; /* version */
#endif
#if BYTE_ORDER == BIG_ENDIAN
u_int eip_ver:4, /* version */
eip_resvl:4; /* reserved */
#endif
u_int8_t eip_resvh; /* reserved */
} __packed;
#define ETHERIP_VERSION 0x3
/* mbuf adjust factor to force 32-bit alignment of IP header */
#define ETHERIP_ALIGN 2
#define GIF_RLOCK() struct epoch_tracker gif_et; epoch_enter_preempt(net_epoch_preempt, &gif_et)
#define GIF_RUNLOCK() epoch_exit_preempt(net_epoch_preempt, &gif_et)
#define GIF_WAIT() epoch_wait_preempt(net_epoch_preempt)
/* Prototypes */
struct gif_list *gif_hashinit(void);
void gif_hashdestroy(struct gif_list *);
void gif_input(struct mbuf *, struct ifnet *, int, uint8_t);
int gif_output(struct ifnet *, struct mbuf *, const struct sockaddr *,
struct route *);
void in_gif_init(void);
void in_gif_uninit(void);
int in_gif_output(struct ifnet *, struct mbuf *, int, uint8_t);
int in_gif_ioctl(struct gif_softc *, u_long, caddr_t);
int in_gif_setopts(struct gif_softc *, u_int);
void in6_gif_init(void);
void in6_gif_uninit(void);
int in6_gif_output(struct ifnet *, struct mbuf *, int, uint8_t);
int in6_gif_ioctl(struct gif_softc *, u_long, caddr_t);
int in6_gif_setopts(struct gif_softc *, u_int);
#endif /* _KERNEL */
#define GIFGOPTS _IOWR('i', 150, struct ifreq)
#define GIFSOPTS _IOW('i', 151, struct ifreq)
#define GIF_IGNORE_SOURCE 0x0002
#define GIF_OPTMASK (GIF_IGNORE_SOURCE)
#endif /* _NET_IF_GIF_H_ */
