1 /* $FreeBSD$ */ 2 /* $KAME: if_gif.h,v 1.17 2000/09/11 11:36:41 sumikawa Exp $ */ 3 4 /*- 5 * SPDX-License-Identifier: BSD-3-Clause 6 * 7 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 8 * Copyright (c) 2018 Andrey V. Elsukov <ae@FreeBSD.org> 9 * All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the project nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #ifndef _NET_IF_GIF_H_ 37 #define _NET_IF_GIF_H_ 38 39 #ifdef _KERNEL 40 41 struct ip; 42 struct ip6_hdr; 43 44 extern void (*ng_gif_input_p)(struct ifnet *ifp, struct mbuf **mp, 45 int af); 46 extern void (*ng_gif_input_orphan_p)(struct ifnet *ifp, struct mbuf *m, 47 int af); 48 extern int (*ng_gif_output_p)(struct ifnet *ifp, struct mbuf **mp); 49 extern void (*ng_gif_attach_p)(struct ifnet *ifp); 50 extern void (*ng_gif_detach_p)(struct ifnet *ifp); 51 52 struct gif_softc { 53 struct ifnet *gif_ifp; 54 int gif_family; 55 int gif_flags; 56 u_int gif_fibnum; 57 u_int gif_options; 58 void *gif_netgraph; /* netgraph node info */ 59 union { 60 void *hdr; 61 struct ip *iphdr; 62 struct ip6_hdr *ip6hdr; 63 } gif_uhdr; 64 65 CK_LIST_ENTRY(gif_softc) chain; 66 CK_LIST_ENTRY(gif_softc) srchash; 67 }; 68 CK_LIST_HEAD(gif_list, gif_softc); 69 MALLOC_DECLARE(M_GIF); 70 71 #ifndef GIF_HASH_SIZE 72 #define GIF_HASH_SIZE (1 << 4) 73 #endif 74 75 #define GIF2IFP(sc) ((sc)->gif_ifp) 76 #define gif_iphdr gif_uhdr.iphdr 77 #define gif_hdr gif_uhdr.hdr 78 #define gif_ip6hdr gif_uhdr.ip6hdr 79 80 #define GIF_MTU (1280) /* Default MTU */ 81 #define GIF_MTU_MIN (1280) /* Minimum MTU */ 82 #define GIF_MTU_MAX (8192) /* Maximum MTU */ 83 84 struct etherip_header { 85 #if BYTE_ORDER == LITTLE_ENDIAN 86 u_int eip_resvl:4, /* reserved */ 87 eip_ver:4; /* version */ 88 #endif 89 #if BYTE_ORDER == BIG_ENDIAN 90 u_int eip_ver:4, /* version */ 91 eip_resvl:4; /* reserved */ 92 #endif 93 u_int8_t eip_resvh; /* reserved */ 94 } __packed; 95 96 #define ETHERIP_VERSION 0x3 97 /* mbuf adjust factor to force 32-bit alignment of IP header */ 98 #define ETHERIP_ALIGN 2 99 100 #define GIF_WAIT() epoch_wait_preempt(net_epoch_preempt) 101 102 /* Prototypes */ 103 struct gif_list *gif_hashinit(void); 104 void gif_hashdestroy(struct gif_list *); 105 106 void gif_input(struct mbuf *, struct ifnet *, int, uint8_t); 107 int gif_output(struct ifnet *, struct mbuf *, const struct sockaddr *, 108 struct route *); 109 110 void in_gif_init(void); 111 void in_gif_uninit(void); 112 int in_gif_output(struct ifnet *, struct mbuf *, int, uint8_t); 113 int in_gif_ioctl(struct gif_softc *, u_long, caddr_t); 114 int in_gif_setopts(struct gif_softc *, u_int); 115 116 void in6_gif_init(void); 117 void in6_gif_uninit(void); 118 int in6_gif_output(struct ifnet *, struct mbuf *, int, uint8_t); 119 int in6_gif_ioctl(struct gif_softc *, u_long, caddr_t); 120 int in6_gif_setopts(struct gif_softc *, u_int); 121 #endif /* _KERNEL */ 122 123 #define GIFGOPTS _IOWR('i', 150, struct ifreq) 124 #define GIFSOPTS _IOW('i', 151, struct ifreq) 125 126 #define GIF_IGNORE_SOURCE 0x0002 127 #define GIF_OPTMASK (GIF_IGNORE_SOURCE) 128 129 #endif /* _NET_IF_GIF_H_ */ 130