lib/libc/rpc/getrpcport.c

   1 /*
   2  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
   3  * unrestricted use provided that this legend is included on all tape
   4  * media and as a part of the software program in whole or part.  Users
   5  * may copy or modify Sun RPC without charge, but are not authorized
   6  * to license or distribute it to anyone else except as part of a product or
   7  * program developed by the user.
   8  *
   9  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
  10  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
  11  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
  12  *
  13  * Sun RPC is provided with no support and without any obligation on the
  14  * part of Sun Microsystems, Inc. to assist in its use, correction,
  15  * modification or enhancement.
  16  *
  17  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
  18  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
  19  * OR ANY PART THEREOF.
  20  *
  21  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
  22  * or profits or other special, indirect and consequential damages, even if
  23  * Sun has been advised of the possibility of such damages.
  24  *
  25  * Sun Microsystems, Inc.
  26  * 2550 Garcia Avenue
  27  * Mountain View, California  94043
  28  *
  29  * @(#)getrpcport.c 1.3 87/08/11 SMI
  30  * @(#)getrpcport.c     2.1 88/07/29 4.0 RPCSRC
  31  * $NetBSD: getrpcport.c,v 1.16 2000/01/22 22:19:18 mycroft Exp $
  32  * $FreeBSD: src/lib/libc/rpc/getrpcport.c,v 1.13 2004/10/16 06:11:34 obrien Exp $
  33  * $DragonFly: src/lib/libc/rpc/getrpcport.c,v 1.3 2005/11/13 12:27:04 swildner Exp $
  34  */
  35
  36 /*
  37  * Copyright (c) 1985 by Sun Microsystems, Inc.
  38  */
  39
  40 #include "namespace.h"
  41 #include <sys/types.h>
  42 #include <sys/socket.h>
  43
  44 #include <assert.h>
  45 #include <netdb.h>
  46 #include <stdio.h>
  47 #include <string.h>
  48
  49 #include <rpc/rpc.h>
  50 #include <rpc/pmap_clnt.h>
  51 #include "un-namespace.h"
  52
  53 int
  54 getrpcport(char *host, int prognum, int versnum, int proto)
  55 {
  56         struct sockaddr_in addr;
  57         struct hostent *hp;
  58
  59         assert(host != NULL);
  60
  61         if ((hp = gethostbyname(host)) == NULL)
  62                 return (0);
  63         memset(&addr, 0, sizeof(addr));
  64         addr.sin_len = sizeof(struct sockaddr_in);
  65         addr.sin_family = AF_INET;
  66         addr.sin_port =  0;
  67         if (hp->h_length > addr.sin_len)
  68                 hp->h_length = addr.sin_len;
  69         memcpy(&addr.sin_addr.s_addr, hp->h_addr, (size_t)hp->h_length);
  70         /* Inconsistent interfaces need casts! :-( */
  71         return (pmap_getport(&addr, (u_long)prognum, (u_long)versnum,
  72             (u_int)proto));
  73 }