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getrpcport.c revision 1.17.2.1 
      1 /*	$NetBSD: getrpcport.c,v 1.17.2.1 2013/06/23 06:21:05 tls 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 1.17.2.1 2013/06/23 06:21:05 tls 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 }
     86