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126 lines
4.3 KiB
C
126 lines
4.3 KiB
C
/* Tests for socket address type definitions.
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Copyright (C) 2016-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, see <http://www.gnu.org/licenses/>. */
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#include <netinet/in.h>
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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/* This is a copy of the previous definition of struct
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sockaddr_storage. It is not equal to the old value of _SS_SIZE
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(128) on all architectures. We must stay compatible with the old
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definition. */
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#define OLD_REFERENCE_SIZE 128
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#define OLD_PADSIZE (OLD_REFERENCE_SIZE - (2 * sizeof (__ss_aligntype)))
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struct sockaddr_storage_old
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{
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__SOCKADDR_COMMON (old_);
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__ss_aligntype old_align;
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char old_padding[OLD_PADSIZE];
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};
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static bool errors;
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static void
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check (bool ok, const char *message)
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{
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if (!ok)
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{
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printf ("error: failed check: %s\n", message);
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errors = true;
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}
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}
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static int
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do_test (void)
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{
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check (OLD_REFERENCE_SIZE >= _SS_SIZE,
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"old target size is not smaller than actual size");
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check (sizeof (struct sockaddr_storage_old)
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== sizeof (struct sockaddr_storage),
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"old and new sizes match");
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check (__alignof (struct sockaddr_storage_old)
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== __alignof (struct sockaddr_storage),
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"old and new alignment matches");
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check (offsetof (struct sockaddr_storage_old, old_family)
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== offsetof (struct sockaddr_storage, ss_family),
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"old and new family offsets match");
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check (sizeof (struct sockaddr_storage) == _SS_SIZE,
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"struct sockaddr_storage size");
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/* Check for lack of holes in the struct definition. */
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check (offsetof (struct sockaddr_storage, __ss_padding)
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== __SOCKADDR_COMMON_SIZE,
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"implicit padding before explicit padding");
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check (offsetof (struct sockaddr_storage, __ss_align)
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== __SOCKADDR_COMMON_SIZE
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+ sizeof (((struct sockaddr_storage) {}).__ss_padding),
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"implicit padding before explicit padding");
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/* Check for POSIX compatibility requirements between struct
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sockaddr_storage and struct sockaddr_un. */
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check (sizeof (struct sockaddr_storage) >= sizeof (struct sockaddr_un),
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"sockaddr_storage is at least as large as sockaddr_un");
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check (__alignof (struct sockaddr_storage)
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>= __alignof (struct sockaddr_un),
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"sockaddr_storage is at least as aligned as sockaddr_un");
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check (offsetof (struct sockaddr_storage, ss_family)
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== offsetof (struct sockaddr_un, sun_family),
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"family offsets match");
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/* Check that the compiler preserves bit patterns in aggregate
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copies. Based on <https://gcc.gnu.org/PR71120>. */
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check (sizeof (struct sockaddr_storage) >= sizeof (struct sockaddr_in),
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"sockaddr_storage is at least as large as sockaddr_in");
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{
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struct sockaddr_storage addr;
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memset (&addr, 0, sizeof (addr));
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{
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struct sockaddr_in *sinp = (struct sockaddr_in *)&addr;
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sinp->sin_family = AF_INET;
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sinp->sin_addr.s_addr = htonl (INADDR_LOOPBACK);
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sinp->sin_port = htons (80);
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}
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struct sockaddr_storage copy;
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copy = addr;
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struct sockaddr_storage *p = malloc (sizeof (*p));
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if (p == NULL)
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{
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printf ("error: malloc: %m\n");
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return 1;
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}
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*p = copy;
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const struct sockaddr_in *sinp = (const struct sockaddr_in *)p;
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check (sinp->sin_family == AF_INET, "sin_family");
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check (sinp->sin_addr.s_addr == htonl (INADDR_LOOPBACK), "sin_addr");
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check (sinp->sin_port == htons (80), "sin_port");
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free (p);
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}
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return errors;
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}
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"
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