rpc.subproj/clnt_simple.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_simple.c 1.35 87/08/11 Copyr 1984 Sun Micro";*/
  56 /*static char *sccsid = "from: @(#)clnt_simple.c        2.2 88/08/01 4.0 RPCSRC";*/
  57 static char *rcsid = "$Id: clnt_simple.c,v 1.3 2002/02/19 20:36:23 epeyton Exp $";
  58 #endif
  59
  60 /*
  61  * clnt_simple.c
  62  * Simplified front end to rpc.
  63  *
  64  * Copyright (C) 1984, Sun Microsystems, Inc.
  65  */
  66
  67 #include <stdio.h>
  68 #include <stdlib.h>
  69 #include <string.h>
  70 #include <unistd.h>
  71 #include <rpc/rpc.h>
  72 #include <sys/socket.h>
  73 #include <netdb.h>
  74
  75 static struct callrpc_private {
  76         CLIENT  *client;
  77         int     socket;
  78         int     oldprognum, oldversnum, valid;
  79         char    *oldhost;
  80 } *callrpc_private;
  81
  82 int
  83 callrpc(host, prognum, versnum, procnum, inproc, in, outproc, out)
  84         char *host;
  85         xdrproc_t inproc, outproc;
  86         char *in, *out;
  87 {
  88         register struct callrpc_private *crp = callrpc_private;
  89         struct sockaddr_in server_addr;
  90         enum clnt_stat clnt_stat;
  91         struct hostent *hp;
  92         struct timeval timeout, tottimeout;
  93
  94         if (crp == 0) {
  95                 crp = (struct callrpc_private *)calloc(1, sizeof (*crp));
  96                 if (crp == 0)
  97                         return (0);
  98                 callrpc_private = crp;
  99         }
 100         if (crp->oldhost == NULL) {
 101                 crp->oldhost = malloc(256);
 102                 crp->oldhost[0] = 0;
 103                 crp->socket = RPC_ANYSOCK;
 104         }
 105         if (crp->valid && crp->oldprognum == prognum && crp->oldversnum == versnum
 106                 && strcmp(crp->oldhost, host) == 0) {
 107                 /* reuse old client */
 108         } else {
 109                 crp->valid = 0;
 110                 (void)close(crp->socket);
 111                 crp->socket = RPC_ANYSOCK;
 112                 if (crp->client) {
 113                         clnt_destroy(crp->client);
 114                         crp->client = NULL;
 115                 }
 116                 if ((hp = gethostbyname(host)) == NULL)
 117                         return ((int) RPC_UNKNOWNHOST);
 118                 timeout.tv_usec = 0;
 119                 timeout.tv_sec = 5;
 120                 bzero((char *)&server_addr, sizeof server_addr);
 121                 bcopy(hp->h_addr, (char *)&server_addr.sin_addr, hp->h_length);
 122                 server_addr.sin_family = AF_INET;
 123                 server_addr.sin_port =  0;
 124                 if ((crp->client = clntudp_create(&server_addr, (u_long)prognum,
 125                     (u_long)versnum, timeout, &crp->socket)) == NULL)
 126                         return ((int) rpc_createerr.cf_stat);
 127                 crp->valid = 1;
 128                 crp->oldprognum = prognum;
 129                 crp->oldversnum = versnum;
 130                 (void) strcpy(crp->oldhost, host);
 131         }
 132         tottimeout.tv_sec = 25;
 133         tottimeout.tv_usec = 0;
 134         clnt_stat = clnt_call(crp->client, procnum, inproc, in,
 135             outproc, out, tottimeout);
 136         /*
 137          * if call failed, empty cache
 138          */
 139         if (clnt_stat != RPC_SUCCESS)
 140                 crp->valid = 0;
 141         return ((int) clnt_stat);
 142 }