1 /* $NetBSD: getaddrinfo.c,v 1.82 2006/03/25 12:09:40 rpaulo Exp $ */
2 /* $KAME: getaddrinfo.c,v 1.29 2000/08/31 17:26:57 itojun Exp $ */
4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the project nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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34 * This is an adaptation of Android's implementation of RFC 6724
35 * (in Android's getaddrinfo.c). It has some cosmetic differences
36 * from Android's getaddrinfo.c, but Android's getaddrinfo.c was
37 * used as a guide or example of a way to implement the RFC 6724 spec when
41 #ifndef ADDRESS_SORTING_H
42 #define ADDRESS_SORTING_H
48 typedef struct address_sorting_address {
51 } address_sorting_address;
53 /* address_sorting_sortable represents one entry in a list of destination
54 * IP addresses to sort. It contains the destination IP address
55 * "sorting key", along with placeholder and scratch fields. */
56 typedef struct address_sorting_sortable {
57 // input data; sorting key
58 address_sorting_address dest_addr;
59 // input data; optional value to attach to the sorting key
61 // internal fields, these must be zero'd when passed to sort function
62 address_sorting_address source_addr;
63 bool source_addr_exists;
64 size_t original_index;
65 } address_sorting_sortable;
67 void address_sorting_rfc_6724_sort(address_sorting_sortable* sortables,
68 size_t sortables_len);
70 void address_sorting_init();
71 void address_sorting_shutdown();
73 struct address_sorting_source_addr_factory;
75 /* The interfaces below are exposed only for testing */
77 /* Gets the source address that would be used for the passed-in destination
78 * address, and fills in *source_addr* with it if one exists.
79 * Returns true if a source address exists for the destination address,
80 * and false otherwise. */
81 bool (*get_source_addr)(struct address_sorting_source_addr_factory* factory,
82 const address_sorting_address* dest_addr,
83 address_sorting_address* source_addr);
84 void (*destroy)(struct address_sorting_source_addr_factory* factory);
85 } address_sorting_source_addr_factory_vtable;
87 typedef struct address_sorting_source_addr_factory {
88 const address_sorting_source_addr_factory_vtable* vtable;
89 } address_sorting_source_addr_factory;
91 /* Platform-compatible address family types */
93 ADDRESS_SORTING_AF_INET,
94 ADDRESS_SORTING_AF_INET6,
95 ADDRESS_SORTING_UNKNOWN_FAMILY,
96 } address_sorting_family;
98 /* Indicates whether the address is AF_INET, AF_INET6, or another address
100 address_sorting_family address_sorting_abstract_get_family(
101 const address_sorting_address* address);
103 void address_sorting_override_source_addr_factory_for_testing(
104 address_sorting_source_addr_factory* factory);
106 bool address_sorting_get_source_addr_for_testing(
107 const address_sorting_address* dest, address_sorting_address* source);
113 #endif // ADDRESS_SORTING_H