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