lib/libc/rpc/rpcb_prot.c

   1 /*      $NetBSD: rpcb_prot.c,v 1.11 2013/03/11 20:19:29 tron Exp $      */
   2
   3 /*
   4  * Copyright (c) 2010, Oracle America, Inc.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are
   8  * met:
   9  *
  10  *     * Redistributions of source code must retain the above copyright
  11  *       notice, this list of conditions and the following disclaimer.
  12  *     * Redistributions in binary form must reproduce the above
  13  *       copyright notice, this list of conditions and the following
  14  *       disclaimer in the documentation and/or other materials
  15  *       provided with the distribution.
  16  *     * Neither the name of the "Oracle America, Inc." nor the names of its
  17  *       contributors may be used to endorse or promote products derived
  18  *       from this software without specific prior written permission.
  19  *
  20  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  23  *   FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  24  *   COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  25  *   INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  *   DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  27  *   GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  28  *   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  29  *   WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  30  *   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33 /*
  34  * Copyright (c) 1986-1991 by Sun Microsystems Inc.
  35  */
  36
  37 /* #ident       "@(#)rpcb_prot.c        1.13    94/04/24 SMI" */
  38
  39 #include <sys/cdefs.h>
  40 #if defined(LIBC_SCCS) && !defined(lint)
  41 #if 0
  42 static char sccsid[] = "@(#)rpcb_prot.c 1.9 89/04/21 Copyr 1984 Sun Micro";
  43 #else
  44 __RCSID("$NetBSD: rpcb_prot.c,v 1.11 2013/03/11 20:19:29 tron Exp $");
  45 #endif
  46 #endif
  47
  48 /*
  49  * rpcb_prot.c
  50  * XDR routines for the rpcbinder version 3.
  51  *
  52  * Copyright (C) 1984, 1988, Sun Microsystems, Inc.
  53  */
  54
  55 #include "namespace.h"
  56
  57 #include <rpc/rpc.h>
  58 #include <rpc/types.h>
  59 #include <rpc/xdr.h>
  60 #include <rpc/rpcb_prot.h>
  61
  62 #include <assert.h>
  63
  64 #ifdef __weak_alias
  65 __weak_alias(xdr_rpcb,_xdr_rpcb)
  66 __weak_alias(xdr_rpcblist_ptr,_xdr_rpcblist_ptr)
  67 __weak_alias(xdr_rpcblist,_xdr_rpcblist)
  68 __weak_alias(xdr_rpcb_entry,_xdr_rpcb_entry)
  69 __weak_alias(xdr_rpcb_entry_list_ptr,_xdr_rpcb_entry_list_ptr)
  70 __weak_alias(xdr_rpcb_rmtcallargs,_xdr_rpcb_rmtcallargs)
  71 __weak_alias(xdr_rpcb_rmtcallres,_xdr_rpcb_rmtcallres)
  72 __weak_alias(xdr_netbuf,_xdr_netbuf)
  73 #endif
  74
  75
  76 bool_t
  77 xdr_rpcb(XDR *xdrs, RPCB *objp)
  78 {
  79
  80         _DIAGASSERT(objp != NULL);
  81
  82         if (!xdr_u_int32_t(xdrs, &objp->r_prog)) {
  83                 return (FALSE);
  84         }
  85         if (!xdr_u_int32_t(xdrs, &objp->r_vers)) {
  86                 return (FALSE);
  87         }
  88         if (!xdr_string(xdrs, &objp->r_netid, (u_int)~0)) {
  89                 return (FALSE);
  90         }
  91         if (!xdr_string(xdrs, &objp->r_addr, (u_int)~0)) {
  92                 return (FALSE);
  93         }
  94         if (!xdr_string(xdrs, &objp->r_owner, (u_int)~0)) {
  95                 return (FALSE);
  96         }
  97         return (TRUE);
  98 }
  99
 100 /*
 101  * rpcblist_ptr implements a linked list.  The RPCL definition from
 102  * rpcb_prot.x is:
 103  *
 104  * struct rpcblist {
 105  *      rpcb            rpcb_map;
 106  *      struct rpcblist *rpcb_next;
 107  * };
 108  * typedef rpcblist *rpcblist_ptr;
 109  *
 110  * Recall that "pointers" in XDR are encoded as a boolean, indicating whether
 111  * there's any data behind the pointer, followed by the data (if any exists).
 112  * The boolean can be interpreted as ``more data follows me''; if FALSE then
 113  * nothing follows the boolean; if TRUE then the boolean is followed by an
 114  * actual struct rpcb, and another rpcblist_ptr (declared in RPCL as "struct
 115  * rpcblist *").
 116  *
 117  * This could be implemented via the xdr_pointer type, though this would
 118  * result in one recursive call per element in the list.  Rather than do that
 119  * we can ``unwind'' the recursion into a while loop and use xdr_reference to
 120  * serialize the rpcb elements.
 121  */
 122
 123 bool_t
 124 xdr_rpcblist_ptr(XDR *xdrs, rpcblist_ptr *rp)
 125 {
 126         /*
 127          * more_elements is pre-computed in case the direction is
 128          * XDR_ENCODE or XDR_FREE.  more_elements is overwritten by
 129          * xdr_bool when the direction is XDR_DECODE.
 130          */
 131         bool_t more_elements;
 132         int freeing;
 133         rpcblist_ptr next;
 134         rpcblist_ptr next_copy;
 135
 136         _DIAGASSERT(xdrs != NULL);
 137         /* XXX: rp may be NULL ??? */
 138
 139         freeing = (xdrs->x_op == XDR_FREE);
 140         next = NULL;
 141
 142         for (;;) {
 143                 more_elements = (bool_t)(*rp != NULL);
 144                 if (! xdr_bool(xdrs, &more_elements)) {
 145                         return (FALSE);
 146                 }
 147                 if (! more_elements) {
 148                         return (TRUE);  /* we are done */
 149                 }
 150                 /*
 151                  * the unfortunate side effect of non-recursion is that in
 152                  * the case of freeing we must remember the next object
 153                  * before we free the current object ...
 154                  */
 155                 if (freeing && *rp)
 156                         next = (*rp)->rpcb_next;
 157                 if (! xdr_reference(xdrs, (caddr_t *)rp,
 158                     (u_int)sizeof (rpcblist), (xdrproc_t)xdr_rpcb)) {
 159                         return (FALSE);
 160                 }
 161                 if (freeing) {
 162                         next_copy = next;
 163                         rp = &next_copy;
 164                         /*
 165                          * Note that in the subsequent iteration, next_copy
 166                          * gets nulled out by the xdr_reference
 167                          * but next itself survives.
 168                          */
 169                 } else if (*rp) {
 170                         rp = &((*rp)->rpcb_next);
 171                 }
 172         }
 173         /*NOTREACHED*/
 174 }
 175
 176 /*
 177  * xdr_rpcblist() is specified to take a RPCBLIST **, but is identical in
 178  * functionality to xdr_rpcblist_ptr().
 179  */
 180 bool_t
 181 xdr_rpcblist(XDR *xdrs, RPCBLIST **rp)
 182 {
 183         bool_t  dummy;
 184
 185         dummy = xdr_rpcblist_ptr(xdrs, (rpcblist_ptr *)rp);
 186         return (dummy);
 187 }
 188
 189
 190 bool_t
 191 xdr_rpcb_entry(XDR *xdrs, rpcb_entry *objp)
 192 {
 193
 194         _DIAGASSERT(objp != NULL);
 195
 196         if (!xdr_string(xdrs, &objp->r_maddr, (u_int)~0)) {
 197                 return (FALSE);
 198         }
 199         if (!xdr_string(xdrs, &objp->r_nc_netid, (u_int)~0)) {
 200                 return (FALSE);
 201         }
 202         if (!xdr_u_int32_t(xdrs, &objp->r_nc_semantics)) {
 203                 return (FALSE);
 204         }
 205         if (!xdr_string(xdrs, &objp->r_nc_protofmly, (u_int)~0)) {
 206                 return (FALSE);
 207         }
 208         if (!xdr_string(xdrs, &objp->r_nc_proto, (u_int)~0)) {
 209                 return (FALSE);
 210         }
 211         return (TRUE);
 212 }
 213
 214 bool_t
 215 xdr_rpcb_entry_list_ptr(XDR *xdrs, rpcb_entry_list_ptr *rp)
 216 {
 217         /*
 218          * more_elements is pre-computed in case the direction is
 219          * XDR_ENCODE or XDR_FREE.  more_elements is overwritten by
 220          * xdr_bool when the direction is XDR_DECODE.
 221          */
 222         bool_t more_elements;
 223         int freeing;
 224         rpcb_entry_list_ptr next;
 225         rpcb_entry_list_ptr next_copy;
 226
 227         _DIAGASSERT(xdrs != NULL);
 228         /* XXX: rp is allowed to be NULL ??? */
 229
 230         freeing = (xdrs->x_op == XDR_FREE);
 231         next = NULL;
 232
 233         for (;;) {
 234                 more_elements = (bool_t)(*rp != NULL);
 235                 if (! xdr_bool(xdrs, &more_elements)) {
 236                         return (FALSE);
 237                 }
 238                 if (! more_elements) {
 239                         return (TRUE);  /* we are done */
 240                 }
 241                 /*
 242                  * the unfortunate side effect of non-recursion is that in
 243                  * the case of freeing we must remember the next object
 244                  * before we free the current object ...
 245                  */
 246                 if (freeing && *rp)
 247                         next = (*rp)->rpcb_entry_next;
 248                 if (! xdr_reference(xdrs, (caddr_t *)rp,
 249                     (u_int)sizeof (rpcb_entry_list),
 250                                     (xdrproc_t)xdr_rpcb_entry)) {
 251                         return (FALSE);
 252                 }
 253                 if (freeing) {
 254                         next_copy = next;
 255                         rp = &next_copy;
 256                         /*
 257                          * Note that in the subsequent iteration, next_copy
 258                          * gets nulled out by the xdr_reference
 259                          * but next itself survives.
 260                          */
 261                 } else if (*rp) {
 262                         rp = &((*rp)->rpcb_entry_next);
 263                 }
 264         }
 265         /*NOTREACHED*/
 266 }
 267
 268 /*
 269  * XDR remote call arguments
 270  * written for XDR_ENCODE direction only
 271  */
 272 bool_t
 273 xdr_rpcb_rmtcallargs(XDR *xdrs, struct rpcb_rmtcallargs *p)
 274 {
 275         struct r_rpcb_rmtcallargs *objp =
 276             (struct r_rpcb_rmtcallargs *)(void *)p;
 277         u_int lenposition, argposition, position;
 278         int32_t *buf;
 279
 280         _DIAGASSERT(p != NULL);
 281
 282         buf = XDR_INLINE(xdrs, 3 * BYTES_PER_XDR_UNIT);
 283         if (buf == NULL) {
 284                 if (!xdr_u_int32_t(xdrs, &objp->prog)) {
 285                         return (FALSE);
 286                 }
 287                 if (!xdr_u_int32_t(xdrs, &objp->vers)) {
 288                         return (FALSE);
 289                 }
 290                 if (!xdr_u_int32_t(xdrs, &objp->proc)) {
 291                         return (FALSE);
 292                 }
 293         } else {
 294                 IXDR_PUT_U_INT32(buf, objp->prog);
 295                 IXDR_PUT_U_INT32(buf, objp->vers);
 296                 IXDR_PUT_U_INT32(buf, objp->proc);
 297         }
 298
 299         /*
 300          * All the jugglery for just getting the size of the arguments
 301          */
 302         lenposition = XDR_GETPOS(xdrs);
 303         if (! xdr_u_int(xdrs, &(objp->args.args_len))) {
 304                 return (FALSE);
 305         }
 306         argposition = XDR_GETPOS(xdrs);
 307         if (! (*objp->xdr_args)(xdrs, objp->args.args_val)) {
 308                 return (FALSE);
 309         }
 310         position = XDR_GETPOS(xdrs);
 311         objp->args.args_len = (u_int)((u_long)position - (u_long)argposition);
 312         XDR_SETPOS(xdrs, lenposition);
 313         if (! xdr_u_int(xdrs, &(objp->args.args_len))) {
 314                 return (FALSE);
 315         }
 316         XDR_SETPOS(xdrs, position);
 317         return (TRUE);
 318 }
 319
 320 /*
 321  * XDR remote call results
 322  * written for XDR_DECODE direction only
 323  */
 324 bool_t
 325 xdr_rpcb_rmtcallres(XDR *xdrs, struct rpcb_rmtcallres *p)
 326 {
 327         bool_t dummy;
 328         struct r_rpcb_rmtcallres *objp = (struct r_rpcb_rmtcallres *)(void *)p;
 329
 330         _DIAGASSERT(p != NULL);
 331
 332         if (!xdr_string(xdrs, &objp->addr, (u_int)~0)) {
 333                 return (FALSE);
 334         }
 335         if (!xdr_u_int(xdrs, &objp->results.results_len)) {
 336                 return (FALSE);
 337         }
 338         dummy = (*(objp->xdr_res))(xdrs, objp->results.results_val);
 339         return (dummy);
 340 }
 341
 342 bool_t
 343 xdr_netbuf(XDR *xdrs, struct netbuf *objp)
 344 {
 345         bool_t dummy;
 346
 347         _DIAGASSERT(objp != NULL);
 348
 349         if (!xdr_u_int32_t(xdrs, (u_int32_t *) &objp->maxlen)) {
 350                 return (FALSE);
 351         }
 352         dummy = xdr_bytes(xdrs, (char **)(void *)&(objp->buf),
 353                         (u_int *)&(objp->len), objp->maxlen);
 354         return (dummy);
 355 }