socket/tst-cmsghdr.c

   1 /* Test ancillary data header creation.
   2    Copyright (C) 2022-2024 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <sys/socket.h>
  20 #include <gnu/lib-names.h>
  21 #include <support/xdlfcn.h>
  22 #include <support/check.h>
  23
  24 #define PAYLOAD "Hello, World!"
  25
  26 /* CMSG_NXTHDR is a macro that calls an inline function defined in
  27    bits/socket.h.  In case the function cannot be inlined, libc.so carries
  28    a copy.  Both versions need to be tested.  */
  29
  30 #define CMSG_NXTHDR_IMPL CMSG_NXTHDR
  31 #include "tst-cmsghdr-skeleton.c"
  32 #undef CMSG_NXTHDR_IMPL
  33
  34 static struct cmsghdr * (* cmsg_nxthdr) (struct msghdr *, struct cmsghdr *);
  35
  36 #define CMSG_NXTHDR_IMPL cmsg_nxthdr
  37 #include "tst-cmsghdr-skeleton.c"
  38 #undef CMSG_NXTHDR_IMPL
  39
  40 static int
  41 do_test (void)
  42 {
  43   static void *handle;
  44
  45   run_test_CMSG_NXTHDR ();
  46
  47   handle = xdlopen (LIBC_SO, RTLD_LAZY);
  48   cmsg_nxthdr = (struct cmsghdr * (*) (struct msghdr *, struct cmsghdr *))
  49                   xdlsym (handle, "__cmsg_nxthdr");
  50
  51   run_test_cmsg_nxthdr ();
  52
  53   return 0;
  54 }
  55
  56 #include <support/test-driver.c>