/* Check for use-after-free in clntudp_call (bug 21115).

   Copyright (C) 2017-2018 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; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <netinet/in.h>

#include <rpc/clnt.h>

#include <rpc/svc.h>

#include <support/check.h>

#include <support/namespace.h>

#include <support/xsocket.h>

#include <unistd.h>

static int

do_test (void)

{

  support_become_root ();

  support_enter_network_namespace ();

  /* Obtain a likely-unused port number.  */

  struct sockaddr_in sin =

    {

      .sin_family = AF_INET,

      .sin_addr.s_addr = htonl (INADDR_LOOPBACK),

    };

  {

    int fd = xsocket (AF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0);

    xbind (fd, (struct sockaddr *) &sin, sizeof (sin));

    socklen_t sinlen = sizeof (sin);

    xgetsockname (fd, (struct sockaddr *) &sin, &sinlen);

    /* Close the socket, so that we will receive an error below.  */

    close (fd);

  }

  int sock = RPC_ANYSOCK;

  CLIENT *clnt = clntudp_create

    (&sin, 1, 2, (struct timeval) { 1, 0 }, &sock);

  TEST_VERIFY_EXIT (clnt != NULL);

  TEST_VERIFY (clnt_call (clnt, 3,

                          (xdrproc_t) xdr_void, NULL,

                          (xdrproc_t) xdr_void, NULL,

                          ((struct timeval) { 3, 0 }))

               == RPC_CANTRECV);

  clnt_destroy (clnt);

  return 0;

}

#include <support/test-driver.c>