1 /* $NetBSD: ip_encap.h,v 1.19 2016/02/29 01:29:15 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 struct encapsw { 43 union { 44 struct encapsw4 { 45 void (*pr_input) /* input to protocol (from below) */ 46 (struct mbuf *, int, int); 47 void *(*pr_ctlinput) /* control input (from below) */ 48 (int, const struct sockaddr *, void *, void *); 49 } _encapsw4; 50 struct encapsw6 { 51 int (*pr_input) /* input to protocol (from below) */ 52 (struct mbuf **, int *, int); 53 void *(*pr_ctlinput) /* control input (from below) */ 54 (int, const struct sockaddr *, void *, void *); 55 } _encapsw6; 56 } encapsw46; 57 }; 58 59 #define encapsw4 encapsw46._encapsw4 60 #define encapsw6 encapsw46._encapsw6 61 62 struct encaptab { 63 struct radix_node nodes[2]; 64 LIST_ENTRY(encaptab) chain; 65 int af; 66 int proto; /* -1: don't care, I'll check myself */ 67 struct sockaddr *addrpack; /* malloc'ed, for radix lookup */ 68 struct sockaddr *maskpack; /* ditto */ 69 struct sockaddr *src; /* my addr */ 70 struct sockaddr *srcmask; 71 struct sockaddr *dst; /* remote addr */ 72 struct sockaddr *dstmask; 73 int (*func) (struct mbuf *, int, int, void *); 74 const struct encapsw *esw; 75 void *arg; /* passed via PACKET_TAG_ENCAP */ 76 }; 77 78 /* to lookup a pair of address using radix tree */ 79 struct sockaddr_pack { 80 u_int8_t sp_len; 81 u_int8_t sp_family; /* not really used */ 82 /* followed by variable-length data */ 83 }; 84 85 struct ip_pack4 { 86 struct sockaddr_pack p; 87 struct sockaddr_in mine; 88 struct sockaddr_in yours; 89 }; 90 struct ip_pack6 { 91 struct sockaddr_pack p; 92 struct sockaddr_in6 mine; 93 struct sockaddr_in6 yours; 94 }; 95 96 void encap_init(void); 97 void encap4_input(struct mbuf *, ...); 98 int encap6_input(struct mbuf **, int *, int); 99 const struct encaptab *encap_attach(int, int, const struct sockaddr *, 100 const struct sockaddr *, const struct sockaddr *, 101 const struct sockaddr *, const struct encapsw *, void *); 102 const struct encaptab *encap_attach_func(int, int, 103 int (*)(struct mbuf *, int, int, void *), 104 const struct encapsw *, void *); 105 void *encap6_ctlinput(int, const struct sockaddr *, void *); 106 int encap_detach(const struct encaptab *); 107 void *encap_getarg(struct mbuf *); 108 109 #define ENCAP_PR_WRAP_CTLINPUT(name) \ 110 static void * \ 111 name##_wrapper(int a, const struct sockaddr *b, void *c, void *d) \ 112 { \ 113 void *rv; \ 114 KERNEL_LOCK(1, NULL); \ 115 rv = name(a, b, c, d); \ 116 KERNEL_UNLOCK_ONE(NULL); \ 117 return rv; \ 118 } 119 #endif 120 121 #endif /* !_NETINET_IP_ENCAP_H_ */ 122