rpc.subproj/svc_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: @(#)svc_simple.c 1.18 87/08/11 Copyr 1984 Sun Micro";*/
  55 /*static char *sccsid = "from: @(#)svc_simple.c 2.2 88/08/01 4.0 RPCSRC";*/
  56 static char *rcsid = "$Id: svc_simple.c,v 1.2 1999/10/14 21:56:54 wsanchez Exp $";
  57 #endif
  58
  59 /*
  60  * svc_simple.c
  61  * Simplified front end to rpc.
  62  *
  63  * Copyright (C) 1984, Sun Microsystems, Inc.
  64  */
  65
  66 #include <stdio.h>
  67 #include <rpc/rpc.h>
  68 #include <sys/socket.h>
  69 #include <netdb.h>
  70
  71 static struct proglst {
  72         char *(*p_progname)();
  73         int  p_prognum;
  74         int  p_procnum;
  75         xdrproc_t p_inproc, p_outproc;
  76         struct proglst *p_nxt;
  77 } *proglst;
  78 static void universal();
  79 static SVCXPRT *transp;
  80 struct proglst *pl;
  81
  82 registerrpc(prognum, versnum, procnum, progname, inproc, outproc)
  83         char *(*progname)();
  84         xdrproc_t inproc, outproc;
  85 {
  86
  87         if (procnum == NULLPROC) {
  88                 (void) fprintf(stderr,
  89                     "can't reassign procedure number %d\n", NULLPROC);
  90                 return (-1);
  91         }
  92         if (transp == 0) {
  93                 transp = svcudp_create(RPC_ANYSOCK);
  94                 if (transp == NULL) {
  95                         (void) fprintf(stderr, "couldn't create an rpc server\n");
  96                         return (-1);
  97                 }
  98         }
  99         (void) pmap_unset((u_long)prognum, (u_long)versnum);
 100         if (!svc_register(transp, (u_long)prognum, (u_long)versnum,
 101             universal, IPPROTO_UDP)) {
 102                 (void) fprintf(stderr, "couldn't register prog %d vers %d\n",
 103                     prognum, versnum);
 104                 return (-1);
 105         }
 106         pl = (struct proglst *)malloc(sizeof(struct proglst));
 107         if (pl == NULL) {
 108                 (void) fprintf(stderr, "registerrpc: out of memory\n");
 109                 return (-1);
 110         }
 111         pl->p_progname = progname;
 112         pl->p_prognum = prognum;
 113         pl->p_procnum = procnum;
 114         pl->p_inproc = inproc;
 115         pl->p_outproc = outproc;
 116         pl->p_nxt = proglst;
 117         proglst = pl;
 118         return (0);
 119 }
 120
 121 static void
 122 universal(rqstp, transp)
 123         struct svc_req *rqstp;
 124         SVCXPRT *transp;
 125 {
 126         int prog, proc;
 127         char *outdata;
 128         char xdrbuf[UDPMSGSIZE];
 129         struct proglst *pl;
 130
 131         /*
 132          * enforce "procnum 0 is echo" convention
 133          */
 134         if (rqstp->rq_proc == NULLPROC) {
 135                 if (svc_sendreply(transp, xdr_void, (char *)NULL) == FALSE) {
 136                         (void) fprintf(stderr, "xxx\n");
 137                         exit(1);
 138                 }
 139                 return;
 140         }
 141         prog = rqstp->rq_prog;
 142         proc = rqstp->rq_proc;
 143         for (pl = proglst; pl != NULL; pl = pl->p_nxt)
 144                 if (pl->p_prognum == prog && pl->p_procnum == proc) {
 145                         /* decode arguments into a CLEAN buffer */
 146                         bzero(xdrbuf, sizeof(xdrbuf)); /* required ! */
 147                         if (!svc_getargs(transp, pl->p_inproc, xdrbuf)) {
 148                                 svcerr_decode(transp);
 149                                 return;
 150                         }
 151                         outdata = (*(pl->p_progname))(xdrbuf);
 152                         if (outdata == NULL && pl->p_outproc != xdr_void)
 153                                 /* there was an error */
 154                                 return;
 155                         if (!svc_sendreply(transp, pl->p_outproc, outdata)) {
 156                                 (void) fprintf(stderr,
 157                                     "trouble replying to prog %d\n",
 158                                     pl->p_prognum);
 159                                 exit(1);
 160                         }
 161                         /* free the decoded arguments */
 162                         (void)svc_freeargs(transp, pl->p_inproc, xdrbuf);
 163                         return;
 164                 }
 165         (void) fprintf(stderr, "never registered prog %d\n", prog);
 166         exit(1);
 167 }
 168