1  /* Obtain the RPC port number for an RPC service on a host.
       2     Copyright (C) 2016-2023 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 License as
       7     published by the Free Software Foundation; either version 2.1 of the
       8     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; see the file COPYING.LIB.  If
      17     not, see <https://www.gnu.org/licenses/>.  */
      18  
      19  /*
      20   * Copyright (c) 2010, Oracle America, Inc.
      21   *
      22   * Redistribution and use in source and binary forms, with or without
      23   * modification, are permitted provided that the following conditions are
      24   * met:
      25   *
      26   *     * Redistributions of source code must retain the above copyright
      27   *       notice, this list of conditions and the following disclaimer.
      28   *     * Redistributions in binary form must reproduce the above
      29   *       copyright notice, this list of conditions and the following
      30   *       disclaimer in the documentation and/or other materials
      31   *       provided with the distribution.
      32   *     * Neither the name of the "Oracle America, Inc." nor the names of its
      33   *       contributors may be used to endorse or promote products derived
      34   *       from this software without specific prior written permission.
      35   *
      36   *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
      37   *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
      38   *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
      39   *   FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
      40   *   COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
      41   *   INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
      42   *   DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
      43   *   GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
      44   *   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
      45   *   WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
      46   *   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
      47   *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
      48   */
      49  
      50  #include <alloca.h>
      51  #include <errno.h>
      52  #include <stdio.h>
      53  #include <netdb.h>
      54  #include <string.h>
      55  #include <rpc/rpc.h>
      56  #include <rpc/clnt.h>
      57  #include <rpc/pmap_clnt.h>
      58  #include <sys/socket.h>
      59  
      60  int
      61  getrpcport (const char *host, u_long prognum, u_long versnum, u_int proto)
      62  {
      63    struct sockaddr_in addr;
      64  
      65    if (__libc_rpc_gethostbyname (host, &addr) != 0)
      66      return 0;
      67    return pmap_getport (&addr, prognum, versnum, proto);
      68  }
      69  #ifdef SHARED
      70  # ifndef EXPORT_RPC_SYMBOLS
      71  compat_symbol (libc, getrpcport, getrpcport, GLIBC_2_0);
      72  # endif
      73  #endif