| /* $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. |
| */ |
| |
| #include "address_sorting_internal.h" |
| |
| #if defined(ADDRESS_SORTING_POSIX) |
| |
| #include <errno.h> |
| #include <inttypes.h> |
| #include <limits.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/types.h> |
| #include <unistd.h> |
| |
| static bool posix_source_addr_factory_get_source_addr( |
| address_sorting_source_addr_factory* factory, |
| const address_sorting_address* dest_addr, |
| address_sorting_address* source_addr) { |
| bool source_addr_exists = false; |
| // Android sets SOCK_CLOEXEC. Don't set this here for portability. |
| int s = socket(((struct sockaddr*)dest_addr)->sa_family, SOCK_DGRAM, 0); |
| if (s != -1) { |
| if (connect(s, (const struct sockaddr*)&dest_addr->addr, |
| (socklen_t)dest_addr->len) != -1) { |
| address_sorting_address found_source_addr; |
| memset(&found_source_addr, 0, sizeof(found_source_addr)); |
| found_source_addr.len = sizeof(found_source_addr.addr); |
| if (getsockname(s, (struct sockaddr*)&found_source_addr.addr, |
| (socklen_t*)&found_source_addr.len) != -1) { |
| source_addr_exists = true; |
| *source_addr = found_source_addr; |
| } |
| } |
| } |
| close(s); |
| return source_addr_exists; |
| } |
| |
| static void posix_source_addr_factory_destroy( |
| address_sorting_source_addr_factory* self) { |
| free(self); |
| } |
| |
| static const address_sorting_source_addr_factory_vtable |
| posix_source_addr_factory_vtable = { |
| posix_source_addr_factory_get_source_addr, |
| posix_source_addr_factory_destroy, |
| }; |
| |
| address_sorting_source_addr_factory* |
| address_sorting_create_source_addr_factory_for_current_platform() { |
| address_sorting_source_addr_factory* factory = |
| malloc(sizeof(address_sorting_source_addr_factory)); |
| memset(factory, 0, sizeof(address_sorting_source_addr_factory)); |
| factory->vtable = &posix_source_addr_factory_vtable; |
| return factory; |
| } |
| |
| #endif // defined(ADDRESS_SORTING_POSIX) |