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/* Tests for socket address type definitions.
Copyright (C) 2016-2023 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, see <https://www.gnu.org/licenses/>. */
#include <netinet/in.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/un.h>
/* This is a copy of the previous definition of struct
sockaddr_storage. It is not equal to the old value of _SS_SIZE
(128) on all architectures. We must stay compatible with the old
definition. */
#define OLD_REFERENCE_SIZE 128
#define OLD_PADSIZE (OLD_REFERENCE_SIZE - (2 * sizeof (__ss_aligntype)))
struct sockaddr_storage_old
{
__SOCKADDR_COMMON (old_);
__ss_aligntype old_align;
char old_padding[OLD_PADSIZE];
};
static bool errors;
static void
check (bool ok, const char *message)
{
if (!ok)
{
printf ("error: failed check: %s\n", message);
errors = true;
}
}
static int
do_test (void)
{
check (OLD_REFERENCE_SIZE >= _SS_SIZE,
"old target size is not smaller than actual size");
check (sizeof (struct sockaddr_storage_old)
== sizeof (struct sockaddr_storage),
"old and new sizes match");
check (__alignof (struct sockaddr_storage_old)
== __alignof (struct sockaddr_storage),
"old and new alignment matches");
check (offsetof (struct sockaddr_storage_old, old_family)
== offsetof (struct sockaddr_storage, ss_family),
"old and new family offsets match");
check (sizeof (struct sockaddr_storage) == _SS_SIZE,
"struct sockaddr_storage size");
/* Check for lack of holes in the struct definition. */
check (offsetof (struct sockaddr_storage, __ss_padding)
== __SOCKADDR_COMMON_SIZE,
"implicit padding before explicit padding");
check (offsetof (struct sockaddr_storage, __ss_align)
== __SOCKADDR_COMMON_SIZE
+ sizeof (((struct sockaddr_storage) {}).__ss_padding),
"implicit padding before explicit padding");
/* Check for POSIX compatibility requirements between struct
sockaddr_storage and struct sockaddr_un. */
check (sizeof (struct sockaddr_storage) >= sizeof (struct sockaddr_un),
"sockaddr_storage is at least as large as sockaddr_un");
check (__alignof (struct sockaddr_storage)
>= __alignof (struct sockaddr_un),
"sockaddr_storage is at least as aligned as sockaddr_un");
check (offsetof (struct sockaddr_storage, ss_family)
== offsetof (struct sockaddr_un, sun_family),
"family offsets match");
/* Check that the compiler preserves bit patterns in aggregate
copies. Based on <https://gcc.gnu.org/PR71120>. */
check (sizeof (struct sockaddr_storage) >= sizeof (struct sockaddr_in),
"sockaddr_storage is at least as large as sockaddr_in");
{
struct sockaddr_storage addr;
memset (&addr, 0, sizeof (addr));
{
struct sockaddr_in *sinp = (struct sockaddr_in *)&addr;
sinp->sin_family = AF_INET;
sinp->sin_addr.s_addr = htonl (INADDR_LOOPBACK);
sinp->sin_port = htons (80);
}
struct sockaddr_storage copy;
copy = addr;
struct sockaddr_storage *p = malloc (sizeof (*p));
if (p == NULL)
{
printf ("error: malloc: %m\n");
return 1;
}
*p = copy;
const struct sockaddr_in *sinp = (const struct sockaddr_in *)p;
check (sinp->sin_family == AF_INET, "sin_family");
check (sinp->sin_addr.s_addr == htonl (INADDR_LOOPBACK), "sin_addr");
check (sinp->sin_port == htons (80), "sin_port");
free (p);
}
return errors;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
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