sunrpc/getrpcport.c

   1 /* Obtain the RPC port number for an RPC service on a host.
   2    Copyright (C) 2016-2022 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