| 1 | /* $NetBSD: ip_encap.h,v 1.22 2016/07/04 04:35:09 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); |
| 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); |
| 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 | struct encaptab { |
| 66 | struct radix_node nodes[2]; |
| 67 | struct pslist_entry chain; |
| 68 | int af; |
| 69 | int proto; /* -1: don't care, I'll check myself */ |
| 70 | struct sockaddr *addrpack; /* malloc'ed, for radix lookup */ |
| 71 | struct sockaddr *maskpack; /* ditto */ |
| 72 | struct sockaddr *src; /* my addr */ |
| 73 | struct sockaddr *srcmask; |
| 74 | struct sockaddr *dst; /* remote addr */ |
| 75 | struct sockaddr *dstmask; |
| 76 | int (*func) (struct mbuf *, int, int, void *); |
| 77 | const struct encapsw *esw; |
| 78 | void *arg; /* passed via PACKET_TAG_ENCAP */ |
| 79 | struct psref_target psref; |
| 80 | }; |
| 81 | |
| 82 | /* to lookup a pair of address using radix tree */ |
| 83 | struct sockaddr_pack { |
| 84 | u_int8_t sp_len; |
| 85 | u_int8_t sp_family; /* not really used */ |
| 86 | /* followed by variable-length data */ |
| 87 | }; |
| 88 | |
| 89 | struct ip_pack4 { |
| 90 | struct sockaddr_pack p; |
| 91 | struct sockaddr_in mine; |
| 92 | struct sockaddr_in yours; |
| 93 | }; |
| 94 | struct ip_pack6 { |
| 95 | struct sockaddr_pack p; |
| 96 | struct sockaddr_in6 mine; |
| 97 | struct sockaddr_in6 yours; |
| 98 | }; |
| 99 | |
| 100 | void encapinit(void); |
| 101 | |
| 102 | void encap_init(void); |
| 103 | void encap4_input(struct mbuf *, ...); |
| 104 | int encap6_input(struct mbuf **, int *, int); |
| 105 | const struct encaptab *encap_attach(int, int, const struct sockaddr *, |
| 106 | const struct sockaddr *, const struct sockaddr *, |
| 107 | const struct sockaddr *, const struct encapsw *, void *); |
| 108 | const struct encaptab *encap_attach_func(int, int, |
| 109 | int (*)(struct mbuf *, int, int, void *), |
| 110 | const struct encapsw *, void *); |
| 111 | void *encap6_ctlinput(int, const struct sockaddr *, void *); |
| 112 | int encap_detach(const struct encaptab *); |
| 113 | void *encap_getarg(struct mbuf *); |
| 114 | |
| 115 | int encap_lock_enter(void); |
| 116 | void encap_lock_exit(void); |
| 117 | bool encap_lock_held(void); |
| 118 | |
| 119 | #define ENCAP_PR_WRAP_CTLINPUT(name) \ |
| 120 | static void * \ |
| 121 | name##_wrapper(int a, const struct sockaddr *b, void *c, void *d) \ |
| 122 | { \ |
| 123 | void *rv; \ |
| 124 | KERNEL_LOCK(1, NULL); \ |
| 125 | rv = name(a, b, c, d); \ |
| 126 | KERNEL_UNLOCK_ONE(NULL); \ |
| 127 | return rv; \ |
| 128 | } |
| 129 | #endif |
| 130 | |
| 131 | #endif /* !_NETINET_IP_ENCAP_H_ */ |
| 132 | |