rpc.subproj/svc_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: @(#)svc_simple.c 1.18 87/08/11 Copyr 1984 Sun Micro";*/
  56 /*static char *sccsid = "from: @(#)svc_simple.c 2.2 88/08/01 4.0 RPCSRC";*/
  57 static char *rcsid = "$Id: svc_simple.c,v 1.3 2002/02/19 20:36:25 epeyton Exp $";
  58 #endif
  59
  60 /*
  61  * svc_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 <rpc/rpc.h>
  71 #include <rpc/pmap_clnt.h>
  72 #include <sys/socket.h>
  73 #include <netdb.h>
  74
  75 static struct proglst {
  76         char *(*p_progname)();
  77         int  p_prognum;
  78         int  p_procnum;
  79         xdrproc_t p_inproc, p_outproc;
  80         struct proglst *p_nxt;
  81 } *proglst;
  82 static void universal();
  83 static SVCXPRT *transp;
  84 struct proglst *pl;
  85
  86 int
  87 registerrpc(prognum, versnum, procnum, progname, inproc, outproc)
  88         char *(*progname)();
  89         xdrproc_t inproc, outproc;
  90 {
  91
  92         if (procnum == NULLPROC) {
  93                 (void) fprintf(stderr,
  94                     "can't reassign procedure number %ld\n", NULLPROC);
  95                 return (-1);
  96         }
  97         if (transp == 0) {
  98                 transp = svcudp_create(RPC_ANYSOCK);
  99                 if (transp == NULL) {
 100                         (void) fprintf(stderr, "couldn't create an rpc server\n");
 101                         return (-1);
 102                 }
 103         }
 104         (void) pmap_unset((u_long)prognum, (u_long)versnum);
 105         if (!svc_register(transp, (u_long)prognum, (u_long)versnum,
 106             universal, IPPROTO_UDP)) {
 107                 (void) fprintf(stderr, "couldn't register prog %d vers %d\n",
 108                     prognum, versnum);
 109                 return (-1);
 110         }
 111         pl = (struct proglst *)malloc(sizeof(struct proglst));
 112         if (pl == NULL) {
 113                 (void) fprintf(stderr, "registerrpc: out of memory\n");
 114                 return (-1);
 115         }
 116         pl->p_progname = progname;
 117         pl->p_prognum = prognum;
 118         pl->p_procnum = procnum;
 119         pl->p_inproc = inproc;
 120         pl->p_outproc = outproc;
 121         pl->p_nxt = proglst;
 122         proglst = pl;
 123         return (0);
 124 }
 125
 126 static void
 127 universal(rqstp, transp)
 128         struct svc_req *rqstp;
 129         SVCXPRT *transp;
 130 {
 131         int prog, proc;
 132         char *outdata;
 133         char xdrbuf[UDPMSGSIZE];
 134         struct proglst *pl;
 135
 136         /*
 137          * enforce "procnum 0 is echo" convention
 138          */
 139         if (rqstp->rq_proc == NULLPROC) {
 140                 if (svc_sendreply(transp, xdr_void, (char *)NULL) == FALSE) {
 141                         (void) fprintf(stderr, "xxx\n");
 142                         exit(1);
 143                 }
 144                 return;
 145         }
 146         prog = rqstp->rq_prog;
 147         proc = rqstp->rq_proc;
 148         for (pl = proglst; pl != NULL; pl = pl->p_nxt)
 149                 if (pl->p_prognum == prog && pl->p_procnum == proc) {
 150                         /* decode arguments into a CLEAN buffer */
 151                         bzero(xdrbuf, sizeof(xdrbuf)); /* required ! */
 152                         if (!svc_getargs(transp, pl->p_inproc, xdrbuf)) {
 153                                 svcerr_decode(transp);
 154                                 return;
 155                         }
 156                         outdata = (*(pl->p_progname))(xdrbuf);
 157                         if (outdata == NULL && pl->p_outproc != xdr_void)
 158                                 /* there was an error */
 159                                 return;
 160                         if (!svc_sendreply(transp, pl->p_outproc, outdata)) {
 161                                 (void) fprintf(stderr,
 162                                     "trouble replying to prog %d\n",
 163                                     pl->p_prognum);
 164                                 exit(1);
 165                         }
 166                         /* free the decoded arguments */
 167                         (void)svc_freeargs(transp, pl->p_inproc, xdrbuf);
 168                         return;
 169                 }
 170         (void) fprintf(stderr, "never registered prog %d\n", prog);
 171         exit(1);
 172 }
 173