rpc.subproj/rpc_prot.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: @(#)rpc_prot.c 1.36 87/08/11 Copyr 1984 Sun Micro";*/
  55 static char *rcsid = "$Id: rpc_prot.c,v 1.2 1999/10/14 21:56:54 wsanchez Exp $";
  56 #endif
  57
  58 /*
  59  * rpc_prot.c
  60  *
  61  * Copyright (C) 1984, Sun Microsystems, Inc.
  62  *
  63  * This set of routines implements the rpc message definition,
  64  * its serializer and some common rpc utility routines.
  65  * The routines are meant for various implementations of rpc -
  66  * they are NOT for the rpc client or rpc service implementations!
  67  * Because authentication stuff is easy and is part of rpc, the opaque
  68  * routines are also in this program.
  69  */
  70
  71 #include <sys/param.h>
  72
  73 #include <rpc/rpc.h>
  74
  75 /* * * * * * * * * * * * * * XDR Authentication * * * * * * * * * * * */
  76
  77 #if defined(__APPLE__)
  78 extern
  79 #endif
  80 struct opaque_auth _null_auth;
  81
  82 /*
  83  * XDR an opaque authentication struct
  84  * (see auth.h)
  85  */
  86 bool_t
  87 xdr_opaque_auth(xdrs, ap)
  88         register XDR *xdrs;
  89         register struct opaque_auth *ap;
  90 {
  91
  92         if (xdr_enum(xdrs, &(ap->oa_flavor)))
  93                 return (xdr_bytes(xdrs, &ap->oa_base,
  94                         &ap->oa_length, MAX_AUTH_BYTES));
  95         return (FALSE);
  96 }
  97
  98 /*
  99  * XDR a DES block
 100  */
 101 bool_t
 102 xdr_des_block(xdrs, blkp)
 103         register XDR *xdrs;
 104         register des_block *blkp;
 105 {
 106         return (xdr_opaque(xdrs, (caddr_t)blkp, sizeof(des_block)));
 107 }
 108
 109 /* * * * * * * * * * * * * * XDR RPC MESSAGE * * * * * * * * * * * * * * * */
 110
 111 /*
 112  * XDR the MSG_ACCEPTED part of a reply message union
 113  */
 114 bool_t
 115 xdr_accepted_reply(xdrs, ar)
 116         register XDR *xdrs;
 117         register struct accepted_reply *ar;
 118 {
 119
 120         /* personalized union, rather than calling xdr_union */
 121         if (! xdr_opaque_auth(xdrs, &(ar->ar_verf)))
 122                 return (FALSE);
 123         if (! xdr_enum(xdrs, (enum_t *)&(ar->ar_stat)))
 124                 return (FALSE);
 125         switch (ar->ar_stat) {
 126
 127         case SUCCESS:
 128                 return ((*(ar->ar_results.proc))(xdrs, ar->ar_results.where));
 129
 130         case PROG_MISMATCH:
 131                 if (! xdr_u_long(xdrs, &(ar->ar_vers.low)))
 132                         return (FALSE);
 133                 return (xdr_u_long(xdrs, &(ar->ar_vers.high)));
 134         }
 135         return (TRUE);  /* TRUE => open ended set of problems */
 136 }
 137
 138 /*
 139  * XDR the MSG_DENIED part of a reply message union
 140  */
 141 bool_t
 142 xdr_rejected_reply(xdrs, rr)
 143         register XDR *xdrs;
 144         register struct rejected_reply *rr;
 145 {
 146
 147         /* personalized union, rather than calling xdr_union */
 148         if (! xdr_enum(xdrs, (enum_t *)&(rr->rj_stat)))
 149                 return (FALSE);
 150         switch (rr->rj_stat) {
 151
 152         case RPC_MISMATCH:
 153                 if (! xdr_u_long(xdrs, &(rr->rj_vers.low)))
 154                         return (FALSE);
 155                 return (xdr_u_long(xdrs, &(rr->rj_vers.high)));
 156
 157         case AUTH_ERROR:
 158                 return (xdr_enum(xdrs, (enum_t *)&(rr->rj_why)));
 159         }
 160         return (FALSE);
 161 }
 162
 163 static struct xdr_discrim reply_dscrm[3] = {
 164         { (int)MSG_ACCEPTED, xdr_accepted_reply },
 165         { (int)MSG_DENIED, xdr_rejected_reply },
 166         { __dontcare__, NULL_xdrproc_t } };
 167
 168 /*
 169  * XDR a reply message
 170  */
 171 bool_t
 172 xdr_replymsg(xdrs, rmsg)
 173         register XDR *xdrs;
 174         register struct rpc_msg *rmsg;
 175 {
 176         if (
 177             xdr_u_long(xdrs, &(rmsg->rm_xid)) &&
 178             xdr_enum(xdrs, (enum_t *)&(rmsg->rm_direction)) &&
 179             (rmsg->rm_direction == REPLY) )
 180                 return (xdr_union(xdrs, (enum_t *)&(rmsg->rm_reply.rp_stat),
 181                    (caddr_t)&(rmsg->rm_reply.ru), reply_dscrm, NULL_xdrproc_t));
 182         return (FALSE);
 183 }
 184
 185
 186 /*
 187  * Serializes the "static part" of a call message header.
 188  * The fields include: rm_xid, rm_direction, rpcvers, prog, and vers.
 189  * The rm_xid is not really static, but the user can easily munge on the fly.
 190  */
 191 bool_t
 192 xdr_callhdr(xdrs, cmsg)
 193         register XDR *xdrs;
 194         register struct rpc_msg *cmsg;
 195 {
 196
 197         cmsg->rm_direction = CALL;
 198         cmsg->rm_call.cb_rpcvers = RPC_MSG_VERSION;
 199         if (
 200             (xdrs->x_op == XDR_ENCODE) &&
 201             xdr_u_long(xdrs, &(cmsg->rm_xid)) &&
 202             xdr_enum(xdrs, (enum_t *)&(cmsg->rm_direction)) &&
 203             xdr_u_long(xdrs, &(cmsg->rm_call.cb_rpcvers)) &&
 204             xdr_u_long(xdrs, &(cmsg->rm_call.cb_prog)) )
 205             return (xdr_u_long(xdrs, &(cmsg->rm_call.cb_vers)));
 206         return (FALSE);
 207 }
 208
 209 /* ************************** Client utility routine ************* */
 210
 211 static void
 212 accepted(acpt_stat, error)
 213         register enum accept_stat acpt_stat;
 214         register struct rpc_err *error;
 215 {
 216
 217         switch (acpt_stat) {
 218
 219         case PROG_UNAVAIL:
 220                 error->re_status = RPC_PROGUNAVAIL;
 221                 return;
 222
 223         case PROG_MISMATCH:
 224                 error->re_status = RPC_PROGVERSMISMATCH;
 225                 return;
 226
 227         case PROC_UNAVAIL:
 228                 error->re_status = RPC_PROCUNAVAIL;
 229                 return;
 230
 231         case GARBAGE_ARGS:
 232                 error->re_status = RPC_CANTDECODEARGS;
 233                 return;
 234
 235         case SYSTEM_ERR:
 236                 error->re_status = RPC_SYSTEMERROR;
 237                 return;
 238
 239         case SUCCESS:
 240                 error->re_status = RPC_SUCCESS;
 241                 return;
 242         }
 243         /* something's wrong, but we don't know what ... */
 244         error->re_status = RPC_FAILED;
 245         error->re_lb.s1 = (long)MSG_ACCEPTED;
 246         error->re_lb.s2 = (long)acpt_stat;
 247 }
 248
 249 static void
 250 rejected(rjct_stat, error)
 251         register enum reject_stat rjct_stat;
 252         register struct rpc_err *error;
 253 {
 254
 255         switch (rjct_stat) {
 256
 257         case RPC_VERSMISMATCH:
 258                 error->re_status = RPC_VERSMISMATCH;
 259                 return;
 260
 261         case AUTH_ERROR:
 262                 error->re_status = RPC_AUTHERROR;
 263                 return;
 264         }
 265         /* something's wrong, but we don't know what ... */
 266         error->re_status = RPC_FAILED;
 267         error->re_lb.s1 = (long)MSG_DENIED;
 268         error->re_lb.s2 = (long)rjct_stat;
 269 }
 270
 271 /*
 272  * given a reply message, fills in the error
 273  */
 274 void
 275 _seterr_reply(msg, error)
 276         register struct rpc_msg *msg;
 277         register struct rpc_err *error;
 278 {
 279
 280         /* optimized for normal, SUCCESSful case */
 281         switch (msg->rm_reply.rp_stat) {
 282
 283         case MSG_ACCEPTED:
 284                 if (msg->acpted_rply.ar_stat == SUCCESS) {
 285                         error->re_status = RPC_SUCCESS;
 286                         return;
 287                 };
 288                 accepted(msg->acpted_rply.ar_stat, error);
 289                 break;
 290
 291         case MSG_DENIED:
 292                 rejected(msg->rjcted_rply.rj_stat, error);
 293                 break;
 294
 295         default:
 296                 error->re_status = RPC_FAILED;
 297                 error->re_lb.s1 = (long)(msg->rm_reply.rp_stat);
 298                 break;
 299         }
 300         switch (error->re_status) {
 301
 302         case RPC_VERSMISMATCH:
 303                 error->re_vers.low = msg->rjcted_rply.rj_vers.low;
 304                 error->re_vers.high = msg->rjcted_rply.rj_vers.high;
 305                 break;
 306
 307         case RPC_AUTHERROR:
 308                 error->re_why = msg->rjcted_rply.rj_why;
 309                 break;
 310
 311         case RPC_PROGVERSMISMATCH:
 312                 error->re_vers.low = msg->acpted_rply.ar_vers.low;
 313                 error->re_vers.high = msg->acpted_rply.ar_vers.high;
 314                 break;
 315         }
 316 }