ip_encap.h revision 1.27
1 /* $NetBSD: ip_encap.h,v 1.27 2022/12/07 08:28:46 knakahara Exp $ */ 2 /* $KAME: ip_encap.h,v 1.7 2000/03/25 07:23:37 sumikawa Exp $ */ 3 4 /* 5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the project nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #ifndef _NETINET_IP_ENCAP_H_ 34 #define _NETINET_IP_ENCAP_H_ 35 36 #ifdef _KERNEL 37 38 #ifndef RNF_NORMAL 39 #include <net/radix.h> 40 #endif 41 42 #include <sys/pslist.h> 43 #include <sys/psref.h> 44 45 struct encapsw { 46 union { 47 struct encapsw4 { 48 void (*pr_input) /* input to protocol (from below) */ 49 (struct mbuf *, int, int, void *); 50 void *(*pr_ctlinput) /* control input (from below) */ 51 (int, const struct sockaddr *, void *, void *); 52 } _encapsw4; 53 struct encapsw6 { 54 int (*pr_input) /* input to protocol (from below) */ 55 (struct mbuf **, int *, int, void *); 56 void *(*pr_ctlinput) /* control input (from below) */ 57 (int, const struct sockaddr *, void *, void *); 58 } _encapsw6; 59 } encapsw46; 60 }; 61 62 #define encapsw4 encapsw46._encapsw4 63 #define encapsw6 encapsw46._encapsw6 64 65 typedef int encap_priofunc_t(struct mbuf *, int, int, void *); 66 67 struct encap_key { 68 union { 69 struct sockaddr local_u_sa; 70 struct sockaddr_in local_u_sin; 71 struct sockaddr_in6 local_u_sin6; 72 } local_u; 73 #define local_sa local_u.local_u_sa 74 #define local_sin local_u.local_u_sin 75 #define local_sin6 local_u.local_u_sin6 76 77 union { 78 struct sockaddr remote_u_sa; 79 struct sockaddr_in remote_u_sin; 80 struct sockaddr_in6 remote_u_sin6; 81 } remote_u; 82 #define remote_sa remote_u.remote_u_sa 83 #define remote_sin remote_u.remote_u_sin 84 #define remote_sin6 remote_u.remote_u_sin6 85 86 u_int seq; 87 }; 88 89 struct encaptab { 90 struct radix_node nodes[2]; 91 struct pslist_entry chain; 92 int af; 93 int proto; /* -1: don't care, I'll check myself */ 94 struct sockaddr *addrpack; /* malloc'ed, for radix lookup */ 95 struct sockaddr *maskpack; /* ditto */ 96 struct sockaddr *src; /* my addr */ 97 struct sockaddr *srcmask; 98 struct sockaddr *dst; /* remote addr */ 99 struct sockaddr *dstmask; 100 encap_priofunc_t *func; 101 const struct encapsw *esw; 102 void *arg; 103 struct encap_key key; 104 u_int flag; 105 struct psref_target psref; 106 }; 107 108 #define IP_ENCAP_ADDR_ENABLE __BIT(0) 109 110 /* to lookup a pair of address using radix tree */ 111 struct sockaddr_pack { 112 u_int8_t sp_len; 113 u_int8_t sp_family; /* not really used */ 114 /* followed by variable-length data */ 115 }; 116 117 struct ip_pack4 { 118 struct sockaddr_pack p; 119 struct sockaddr_in mine; 120 struct sockaddr_in yours; 121 }; 122 struct ip_pack6 { 123 struct sockaddr_pack p; 124 struct sockaddr_in6 mine; 125 struct sockaddr_in6 yours; 126 }; 127 128 void encapinit(void); 129 130 void encap_init(void); 131 void encap4_input(struct mbuf *, int, int); 132 int encap6_input(struct mbuf **, int *, int); 133 const struct encaptab *encap_attach(int, int, const struct sockaddr *, 134 const struct sockaddr *, const struct sockaddr *, 135 const struct sockaddr *, const struct encapsw *, void *); 136 const struct encaptab *encap_attach_func(int, int, 137 encap_priofunc_t *, 138 const struct encapsw *, void *); 139 const struct encaptab *encap_attach_addr(int, int, 140 const struct sockaddr *, const struct sockaddr *, 141 encap_priofunc_t *, const struct encapsw *, void *); 142 void *encap6_ctlinput(int, const struct sockaddr *, void *); 143 int encap_detach(const struct encaptab *); 144 145 int encap_lock_enter(void); 146 void encap_lock_exit(void); 147 bool encap_lock_held(void); 148 149 #define ENCAP_PR_WRAP_CTLINPUT(name) \ 150 static void * \ 151 name##_wrapper(int a, const struct sockaddr *b, void *c, void *d) \ 152 { \ 153 void *rv; \ 154 KERNEL_LOCK(1, NULL); \ 155 rv = name(a, b, c, d); \ 156 KERNEL_UNLOCK_ONE(NULL); \ 157 return rv; \ 158 } 159 #endif 160 161 #endif /* !_NETINET_IP_ENCAP_H_ */ 162
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