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
81extern int clat_debug;
82
83enum { NT_DROP, NT_NAT64 };
84enum { NT_IN, NT_OUT };
85struct 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
100int
101nat464_translate_icmp(int, void *);
102
103int
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
108int
109 nat464_synthesize_ipv6(ifnet_t, const struct in_addr *, struct in6_addr *);
110
111int
112 nat464_synthesize_ipv4(ifnet_t, const struct in6_addr *, struct in_addr *);
113
114int
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
118int
119 nat464_translate_46(pbuf_t *, uint16_t, uint8_t, uint8_t, uint8_t, struct in6_addr,
120 struct in6_addr, uint16_t);
121
122int
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
126int
127 nat464_insert_frag46(pbuf_t *, uint16_t, uint16_t, boolean_t);
128
129int
130 nat464_remove_frag64(pbuf_t *, uint32_t, uint16_t, boolean_t);
131
132uint16_t
133 nat464_cksum_fixup(uint16_t, uint16_t, uint16_t, uint8_t);
134#endif /* !_NET_NAT464_UTILS_H_ */
135