diff options
Diffstat (limited to 'third_party/address_sorting/address_sorting_posix.c')
-rw-r--r-- | third_party/address_sorting/address_sorting_posix.c | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/third_party/address_sorting/address_sorting_posix.c b/third_party/address_sorting/address_sorting_posix.c new file mode 100644 index 0000000000..d0dfe12469 --- /dev/null +++ b/third_party/address_sorting/address_sorting_posix.c @@ -0,0 +1,97 @@ +/* $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) |