lib/libc/rpc/getrpcport.c

   1 /*      $NetBSD: getrpcport.c,v 1.18 2013/03/11 20:19:29 tron Exp $     */
   2
   3 /*
   4  * Copyright (c) 2010, Oracle America, Inc.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are
   8  * met:
   9  *
  10  *     * Redistributions of source code must retain the above copyright
  11  *       notice, this list of conditions and the following disclaimer.
  12  *     * Redistributions in binary form must reproduce the above
  13  *       copyright notice, this list of conditions and the following
  14  *       disclaimer in the documentation and/or other materials
  15  *       provided with the distribution.
  16  *     * Neither the name of the "Oracle America, Inc." nor the names of its
  17  *       contributors may be used to endorse or promote products derived
  18  *       from this software without specific prior written permission.
  19  *
  20  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  23  *   FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  24  *   COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  25  *   INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  *   DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  27  *   GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  28  *   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  29  *   WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  30  *   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <sys/cdefs.h>
  35 #if defined(LIBC_SCCS) && !defined(lint)
  36 #if 0
  37 static char *sccsid = "@(#)getrpcport.c 1.3 87/08/11 SMI";
  38 static char *sccsid = "@(#)getrpcport.c 2.1 88/07/29 4.0 RPCSRC";
  39 #else
  40 __RCSID("$NetBSD: getrpcport.c,v 1.18 2013/03/11 20:19:29 tron Exp $");
  41 #endif
  42 #endif
  43
  44 /*
  45  * Copyright (c) 1985 by Sun Microsystems, Inc.
  46  */
  47
  48 #include "namespace.h"
  49
  50 #include <sys/types.h>
  51 #include <sys/socket.h>
  52
  53 #include <assert.h>
  54 #include <netdb.h>
  55 #include <stdio.h>
  56 #include <string.h>
  57
  58 #include <rpc/rpc.h>
  59 #include <rpc/pmap_clnt.h>
  60
  61 #ifdef __weak_alias
  62 __weak_alias(getrpcport,_getrpcport)
  63 #endif
  64
  65 int
  66 getrpcport(char *host, int prognum, int versnum, int proto)
  67 {
  68         struct sockaddr_in addr;
  69         struct hostent *hp;
  70
  71         _DIAGASSERT(host != NULL);
  72
  73         if ((hp = gethostbyname(host)) == NULL)
  74                 return (0);
  75         memset(&addr, 0, sizeof(addr));
  76         addr.sin_len = sizeof(struct sockaddr_in);
  77         addr.sin_family = AF_INET;
  78         addr.sin_port =  0;
  79         if (hp->h_length > addr.sin_len)
  80                 hp->h_length = addr.sin_len;
  81         memcpy(&addr.sin_addr.s_addr, hp->h_addr, (size_t)hp->h_length);
  82         /* Inconsistent interfaces need casts! :-( */
  83         return (pmap_getport(&addr, (u_long)prognum, (u_long)versnum,
  84             (u_int)proto));
  85 }