lib/libc/rpc/getrpcport.c

   1 /*-
   2  * Copyright (c) 2009, Sun Microsystems, Inc.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are met:
   7  * - Redistributions of source code must retain the above copyright notice,
   8  *   this list of conditions and the following disclaimer.
   9  * - Redistributions in binary form must reproduce the above copyright notice,
  10  *   this list of conditions and the following disclaimer in the documentation
  11  *   and/or other materials provided with the distribution.
  12  * - Neither the name of Sun Microsystems, Inc. nor the names of its
  13  *   contributors may be used to endorse or promote products derived
  14  *   from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  17  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  20  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  26  * POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * @(#)getrpcport.c 1.3 87/08/11 SMI
  29  * @(#)getrpcport.c     2.1 88/07/29 4.0 RPCSRC
  30  * $NetBSD: getrpcport.c,v 1.16 2000/01/22 22:19:18 mycroft Exp $
  31  * $FreeBSD: src/lib/libc/rpc/getrpcport.c,v 1.13 2004/10/16 06:11:34 obrien Exp $
  32  * $DragonFly: src/lib/libc/rpc/getrpcport.c,v 1.3 2005/11/13 12:27:04 swildner Exp $
  33  */
  34
  35 /*
  36  * Copyright (c) 1985 by Sun Microsystems, Inc.
  37  */
  38
  39 #include "namespace.h"
  40 #include <sys/types.h>
  41 #include <sys/socket.h>
  42
  43 #include <assert.h>
  44 #include <netdb.h>
  45 #include <stdio.h>
  46 #include <string.h>
  47
  48 #include <rpc/rpc.h>
  49 #include <rpc/pmap_clnt.h>
  50 #include "un-namespace.h"
  51
  52 int
  53 getrpcport(char *host, int prognum, int versnum, int proto)
  54 {
  55         struct sockaddr_in addr;
  56         struct hostent *hp;
  57
  58         assert(host != NULL);
  59
  60         if ((hp = gethostbyname(host)) == NULL)
  61                 return (0);
  62         memset(&addr, 0, sizeof(addr));
  63         addr.sin_len = sizeof(struct sockaddr_in);
  64         addr.sin_family = AF_INET;
  65         addr.sin_port =  0;
  66         if (hp->h_length > addr.sin_len)
  67                 hp->h_length = addr.sin_len;
  68         memcpy(&addr.sin_addr.s_addr, hp->h_addr, (size_t)hp->h_length);
  69         /* Inconsistent interfaces need casts! :-( */
  70         return (pmap_getport(&addr, (u_long)prognum, (u_long)versnum,
  71             (u_int)proto));
  72 }