1 /* 2 * Copyright (c) 2018 Apple Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28 29 /* 30 * Copyright (c) 2001 Daniel Hartmeier 31 * Copyright (c) 2002 - 2013 Henning Brauer 32 * NAT64 - Copyright (c) 2010 Viagenie Inc. (http://www.viagenie.ca) 33 * All rights reserved. 34 * 35 * Redistribution and use in source and binary forms, with or without 36 * modification, are permitted provided that the following conditions 37 * are met: 38 * 39 * - Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * - Redistributions in binary form must reproduce the above 42 * copyright notice, this list of conditions and the following 43 * disclaimer in the documentation and/or other materials provided 44 * with the distribution. 45 * 46 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 47 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 48 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 49 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 50 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 51 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 52 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 53 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 54 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 55 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 56 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 57 * POSSIBILITY OF SUCH DAMAGE. 58 * 59 * Effort sponsored in part by the Defense Advanced Research Projects 60 * Agency (DARPA) and Air Force Research Laboratory, Air Force 61 * Materiel Command, USAF, under agreement number F30602-01-2-0537. 62 * 63 */ 64 #ifndef _NET_NAT464_UTILS_H_ 65 #define _NET_NAT464_UTILS_H_ 66 #include <netinet/in.h> 67 #include <net/pf_pbuf.h> 68 69 #define clat_log0(x) do { log x; } while (0) 70 #define clat_log1(x) do { if (clat_debug >= 1) log x; } while (0) 71 #define clat_log2(x) do { if (clat_debug >= 2) log x; } while (0) 72 73 #define CLAT46_NEEDED(x) \ 74 (!IN_LOOPBACK(x) && !IN_LINKLOCAL(x) && !IN_MULTICAST(x) && \ 75 INADDR_BROADCAST != x) 76 77 #define CLAT64_NEEDED(x) \ 78 (!IN6_IS_ADDR_LOOPBACK(x) && !IN6_IS_ADDR_LINKLOCAL(x) && \ 79 !IN6_IS_ADDR_MULTICAST(x)) 80 81 extern int clat_debug; 82 83 enum { NT_DROP, NT_NAT64 }; 84 enum { NT_IN, NT_OUT }; 85 struct nat464_addr { 86 union { 87 struct in_addr _v4addr; 88 struct in6_addr _v6addr; 89 uint8_t _addr8[16]; 90 uint16_t _addr16[8]; 91 uint32_t _addr32[4]; 92 } nat464a; /* 128-bit address */ 93 #define natv4addr nat464a._v4addr 94 #define natv6addr nat464a._v6addr 95 #define nataddr8 nat464a._addr8 96 #define nataddr16 nat464a._addr16 97 #define nataddr32 nat464a._addr32 98 }; 99 100 int 101 nat464_translate_icmp(int, void *); 102 103 int 104 nat464_translate_icmp_ip(pbuf_t *, uint16_t, uint16_t *, uint16_t *, 105 uint8_t, uint8_t, uint16_t, struct nat464_addr *, 106 struct nat464_addr *, protocol_family_t, protocol_family_t ); 107 108 int 109 nat464_synthesize_ipv6(ifnet_t, const struct in_addr *, struct in6_addr *); 110 111 int 112 nat464_synthesize_ipv4(ifnet_t, const struct in6_addr *, struct in_addr *); 113 114 int 115 nat464_translate_64(pbuf_t *, int, uint8_t, uint8_t *, uint8_t, struct in_addr, 116 struct in_addr, uint64_t, boolean_t *); 117 118 int 119 nat464_translate_46(pbuf_t *, uint16_t, uint8_t, uint8_t, uint8_t, struct in6_addr, 120 struct in6_addr, uint16_t); 121 122 int 123 nat464_translate_proto(pbuf_t *, struct nat464_addr *, struct nat464_addr *, 124 uint8_t, protocol_family_t, protocol_family_t, int, boolean_t); 125 126 int 127 nat464_insert_frag46(pbuf_t *, uint16_t, uint16_t, boolean_t); 128 129 int 130 nat464_remove_frag64(pbuf_t *, uint32_t, uint16_t, boolean_t); 131 132 uint16_t 133 nat464_cksum_fixup(uint16_t, uint16_t, uint16_t, uint8_t); 134 #endif /* !_NET_NAT464_UTILS_H_ */ 135