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/* $NetBSD: getaddrinfo.c,v 1.82 2006/03/25 12:09:40 rpaulo Exp $ */
/* $KAME: getaddrinfo.c,v 1.29 2000/08/31 17:26:57 itojun Exp $ */
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
/*
* This is an adaptation of Android's implementation of RFC 6724
* (in Android's getaddrinfo.c). It has some cosmetic differences
* from Android's getaddrinfo.c, but Android's getaddrinfo.c was
* used as a guide or example of a way to implement the RFC 6724 spec when
* this was written.
*/
#ifndef ADDRESS_SORTING_H
#define ADDRESS_SORTING_H
#ifdef __cplusplus
extern "C" {
#endif
typedef struct address_sorting_address {
char addr[128];
size_t len;
} address_sorting_address;
/* address_sorting_sortable represents one entry in a list of destination
* IP addresses to sort. It contains the destination IP address
* "sorting key", along with placeholder and scratch fields. */
typedef struct address_sorting_sortable {
// input data; sorting key
address_sorting_address dest_addr;
// input data; optional value to attach to the sorting key
void* user_data;
// internal fields, these must be zero'd when passed to sort function
address_sorting_address source_addr;
bool source_addr_exists;
size_t original_index;
} address_sorting_sortable;
void address_sorting_rfc_6724_sort(address_sorting_sortable* sortables,
size_t sortables_len);
void address_sorting_init();
void address_sorting_shutdown();
struct address_sorting_source_addr_factory;
/* The interfaces below are exposed only for testing */
typedef struct {
/* Gets the source address that would be used for the passed-in destination
* address, and fills in *source_addr* with it if one exists.
* Returns true if a source address exists for the destination address,
* and false otherwise. */
bool (*get_source_addr)(struct address_sorting_source_addr_factory* factory,
const address_sorting_address* dest_addr,
address_sorting_address* source_addr);
void (*destroy)(struct address_sorting_source_addr_factory* factory);
} address_sorting_source_addr_factory_vtable;
typedef struct address_sorting_source_addr_factory {
const address_sorting_source_addr_factory_vtable* vtable;
} address_sorting_source_addr_factory;
/* Platform-compatible address family types */
typedef enum {
ADDRESS_SORTING_AF_INET,
ADDRESS_SORTING_AF_INET6,
ADDRESS_SORTING_UNKNOWN_FAMILY,
} address_sorting_family;
/* Indicates whether the address is AF_INET, AF_INET6, or another address
* family. */
address_sorting_family address_sorting_abstract_get_family(
const address_sorting_address* address);
void address_sorting_override_source_addr_factory_for_testing(
address_sorting_source_addr_factory* factory);
#ifdef __cplusplus
}
#endif
#endif // ADDRESS_SORTING_H
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