rpc.subproj/clnt_generic.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
   7  * Reserved.  This file contains Original Code and/or Modifications of
   8  * Original Code as defined in and that are subject to the Apple Public
   9  * Source License Version 1.1 (the "License").  You may not use this file
  10  * except in compliance with the License.  Please obtain a copy of the
  11  * License at http://www.apple.com/publicsource and read it before using
  12  * this file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT.  Please see the
  19  * License for the specific language governing rights and limitations
  20  * under the License.
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23  */
  24 /*
  25  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
  26  * unrestricted use provided that this legend is included on all tape
  27  * media and as a part of the software program in whole or part.  Users
  28  * may copy or modify Sun RPC without charge, but are not authorized
  29  * to license or distribute it to anyone else except as part of a product or
  30  * program developed by the user.
  31  *
  32  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
  33  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
  34  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
  35  *
  36  * Sun RPC is provided with no support and without any obligation on the
  37  * part of Sun Microsystems, Inc. to assist in its use, correction,
  38  * modification or enhancement.
  39  *
  40  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
  41  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
  42  * OR ANY PART THEREOF.
  43  *
  44  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
  45  * or profits or other special, indirect and consequential damages, even if
  46  * Sun has been advised of the possibility of such damages.
  47  *
  48  * Sun Microsystems, Inc.
  49  * 2550 Garcia Avenue
  50  * Mountain View, California  94043
  51  */
  52
  53 #if defined(LIBC_SCCS) && !defined(lint)
  54 /*static char *sccsid = "from: @(#)clnt_generic.c 1.4 87/08/11 (C) 1987 SMI";*/
  55 /*static char *sccsid = "from: @(#)clnt_generic.c       2.2 88/08/01 4.0 RPCSRC";*/
  56 static char *rcsid = "$Id: clnt_generic.c,v 1.2 1999/10/14 21:56:52 wsanchez Exp $";
  57 #endif
  58
  59 /*
  60  * Copyright (C) 1987, Sun Microsystems, Inc.
  61  */
  62 #include <rpc/rpc.h>
  63 #include <sys/socket.h>
  64 #include <sys/errno.h>
  65 #include <netdb.h>
  66
  67 /*
  68  * Generic client creation: takes (hostname, program-number, protocol) and
  69  * returns client handle. Default options are set, which the user can
  70  * change using the rpc equivalent of ioctl()'s.
  71  */
  72 CLIENT *
  73 clnt_create(hostname, prog, vers, proto)
  74         char *hostname;
  75         u_long prog;
  76         u_long vers;
  77         char *proto;
  78 {
  79         struct hostent *h;
  80         struct protoent *p;
  81         struct sockaddr_in sin;
  82         int sock;
  83         struct timeval tv;
  84         CLIENT *client;
  85
  86         h = gethostbyname(hostname);
  87         if (h == NULL) {
  88                 rpc_createerr.cf_stat = RPC_UNKNOWNHOST;
  89                 return (NULL);
  90         }
  91         if (h->h_addrtype != AF_INET) {
  92                 /*
  93                  * Only support INET for now
  94                  */
  95                 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
  96                 rpc_createerr.cf_error.re_errno = EAFNOSUPPORT;
  97                 return (NULL);
  98         }
  99         bzero((char *)&sin, sizeof sin);
 100         sin.sin_family = h->h_addrtype;
 101         sin.sin_port = 0;
 102         bcopy(h->h_addr, (char*)&sin.sin_addr, h->h_length);
 103         p = getprotobyname(proto);
 104         if (p == NULL) {
 105                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 106                 rpc_createerr.cf_error.re_errno = EPFNOSUPPORT;
 107                 return (NULL);
 108         }
 109         sock = RPC_ANYSOCK;
 110         switch (p->p_proto) {
 111         case IPPROTO_UDP:
 112                 tv.tv_sec = 5;
 113                 tv.tv_usec = 0;
 114                 client = clntudp_create(&sin, prog, vers, tv, &sock);
 115                 if (client == NULL) {
 116                         return (NULL);
 117                 }
 118                 break;
 119         case IPPROTO_TCP:
 120                 client = clnttcp_create(&sin, prog, vers, &sock, 0, 0);
 121                 if (client == NULL) {
 122                         return (NULL);
 123                 }
 124                 break;
 125         default:
 126                 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
 127                 rpc_createerr.cf_error.re_errno = EPFNOSUPPORT;
 128                 return (NULL);
 129         }
 130         return (client);
 131 }