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