rpc.subproj/clnt_generic.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
  27  * unrestricted use provided that this legend is included on all tape
  28  * media and as a part of the software program in whole or part.  Users
  29  * may copy or modify Sun RPC without charge, but are not authorized
  30  * to license or distribute it to anyone else except as part of a product or
  31  * program developed by the user.
  32  *
  33  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
  34  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
  35  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
  36  *
  37  * Sun RPC is provided with no support and without any obligation on the
  38  * part of Sun Microsystems, Inc. to assist in its use, correction,
  39  * modification or enhancement.
  40  *
  41  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
  42  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
  43  * OR ANY PART THEREOF.
  44  *
  45  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
  46  * or profits or other special, indirect and consequential damages, even if
  47  * Sun has been advised of the possibility of such damages.
  48  *
  49  * Sun Microsystems, Inc.
  50  * 2550 Garcia Avenue
  51  * Mountain View, California  94043
  52  */
  53
  54 #if defined(LIBC_SCCS) && !defined(lint)
  55 /*static char *sccsid = "from: @(#)clnt_generic.c 1.4 87/08/11 (C) 1987 SMI";*/
  56 /*static char *sccsid = "from: @(#)clnt_generic.c       2.2 88/08/01 4.0 RPCSRC";*/
  57 static char *rcsid = "$Id: clnt_generic.c,v 1.3 2002/02/19 20:36:22 epeyton Exp $";
  58 #endif
  59
  60 /*
  61  * Copyright (C) 1987, Sun Microsystems, Inc.
  62  */
  63 #include <string.h>
  64 #include <rpc/rpc.h>
  65 #include <sys/socket.h>
  66 #include <sys/errno.h>
  67 #include <netdb.h>
  68
  69 /*
  70  * Generic client creation: takes (hostname, program-number, protocol) and
  71  * returns client handle. Default options are set, which the user can
  72  * change using the rpc equivalent of ioctl()'s.
  73  */
  74 CLIENT *
  75 clnt_create(hostname, prog, vers, proto)
  76         char *hostname;
  77         u_long prog;
  78         u_long vers;
  79         char *proto;
  80 {
  81         struct hostent *h;
  82         struct protoent *p;
  83         struct sockaddr_in sin;
  84         int sock;
  85         struct timeval tv;
  86         CLIENT *client;
  87
  88         h = gethostbyname(hostname);
  89         if (h == NULL) {
  90                 rpc_createerr.cf_stat = RPC_UNKNOWNHOST;
  91                 return (NULL);
  92         }
  93         if (h->h_addrtype != AF_INET) {
  94                 /*
  95                  * Only support INET for now
  96                  */
  97                 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
  98                 rpc_createerr.cf_error.re_errno = EAFNOSUPPORT;
  99                 return (NULL);
 100         }
 101         bzero((char *)&sin, sizeof sin);
 102         sin.sin_family = h->h_addrtype;
 103         sin.sin_port = 0;
 104         bcopy(h->h_addr, (char*)&sin.sin_addr, h->h_length);
 105         p = getprotobyname(proto);
 106         if (p == NULL) {
 107                 rpc_createerr.cf_stat = RPC_UNKNOWNPROTO;
 108                 rpc_createerr.cf_error.re_errno = EPFNOSUPPORT;
 109                 return (NULL);
 110         }
 111         sock = RPC_ANYSOCK;
 112         switch (p->p_proto) {
 113         case IPPROTO_UDP:
 114                 tv.tv_sec = 5;
 115                 tv.tv_usec = 0;
 116                 client = clntudp_create(&sin, prog, vers, tv, &sock);
 117                 if (client == NULL) {
 118                         return (NULL);
 119                 }
 120                 break;
 121         case IPPROTO_TCP:
 122                 client = clnttcp_create(&sin, prog, vers, &sock, 0, 0);
 123                 if (client == NULL) {
 124                         return (NULL);
 125                 }
 126                 break;
 127         default:
 128                 rpc_createerr.cf_stat = RPC_SYSTEMERROR;
 129                 rpc_createerr.cf_error.re_errno = EPFNOSUPPORT;
 130                 return (NULL);
 131         }
 132         return (client);
 133 }