lib/libc/rpc/rpcb_prot.c

   1 /*      $NetBSD: rpcb_prot.c,v 1.9 2006/05/11 17:11:57 mrg Exp $        */
   2
   3 /*
   4  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
   5  * unrestricted use provided that this legend is included on all tape
   6  * media and as a part of the software program in whole or part.  Users
   7  * may copy or modify Sun RPC without charge, but are not authorized
   8  * to license or distribute it to anyone else except as part of a product or
   9  * program developed by the user.
  10  *
  11  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
  12  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
  13  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
  14  *
  15  * Sun RPC is provided with no support and without any obligation on the
  16  * part of Sun Microsystems, Inc. to assist in its use, correction,
  17  * modification or enhancement.
  18  *
  19  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
  20  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
  21  * OR ANY PART THEREOF.
  22  *
  23  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
  24  * or profits or other special, indirect and consequential damages, even if
  25  * Sun has been advised of the possibility of such damages.
  26  *
  27  * Sun Microsystems, Inc.
  28  * 2550 Garcia Avenue
  29  * Mountain View, California  94043
  30  */
  31 /*
  32  * Copyright (c) 1986-1991 by Sun Microsystems Inc.
  33  */
  34
  35 /* #ident       "@(#)rpcb_prot.c        1.13    94/04/24 SMI" */
  36
  37 #include <sys/cdefs.h>
  38 #if defined(LIBC_SCCS) && !defined(lint)
  39 #if 0
  40 static char sccsid[] = "@(#)rpcb_prot.c 1.9 89/04/21 Copyr 1984 Sun Micro";
  41 #else
  42 __RCSID("$NetBSD: rpcb_prot.c,v 1.9 2006/05/11 17:11:57 mrg Exp $");
  43 #endif
  44 #endif
  45
  46 /*
  47  * rpcb_prot.c
  48  * XDR routines for the rpcbinder version 3.
  49  *
  50  * Copyright (C) 1984, 1988, Sun Microsystems, Inc.
  51  */
  52
  53 #include "namespace.h"
  54
  55 #include <rpc/rpc.h>
  56 #include <rpc/types.h>
  57 #include <rpc/xdr.h>
  58 #include <rpc/rpcb_prot.h>
  59
  60 #include <assert.h>
  61
  62 #ifdef __weak_alias
  63 __weak_alias(xdr_rpcb,_xdr_rpcb)
  64 __weak_alias(xdr_rpcblist_ptr,_xdr_rpcblist_ptr)
  65 __weak_alias(xdr_rpcblist,_xdr_rpcblist)
  66 __weak_alias(xdr_rpcb_entry,_xdr_rpcb_entry)
  67 __weak_alias(xdr_rpcb_entry_list_ptr,_xdr_rpcb_entry_list_ptr)
  68 __weak_alias(xdr_rpcb_rmtcallargs,_xdr_rpcb_rmtcallargs)
  69 __weak_alias(xdr_rpcb_rmtcallres,_xdr_rpcb_rmtcallres)
  70 __weak_alias(xdr_netbuf,_xdr_netbuf)
  71 #endif
  72
  73
  74 bool_t
  75 xdr_rpcb(xdrs, objp)
  76         XDR *xdrs;
  77         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(xdrs, rp)
 125         XDR *xdrs;
 126         rpcblist_ptr *rp;
 127 {
 128         /*
 129          * more_elements is pre-computed in case the direction is
 130          * XDR_ENCODE or XDR_FREE.  more_elements is overwritten by
 131          * xdr_bool when the direction is XDR_DECODE.
 132          */
 133         bool_t more_elements;
 134         int freeing;
 135         rpcblist_ptr next;
 136         rpcblist_ptr next_copy;
 137
 138         _DIAGASSERT(xdrs != NULL);
 139         /* XXX: rp may be NULL ??? */
 140
 141         freeing = (xdrs->x_op == XDR_FREE);
 142         next = NULL;
 143
 144         for (;;) {
 145                 more_elements = (bool_t)(*rp != NULL);
 146                 if (! xdr_bool(xdrs, &more_elements)) {
 147                         return (FALSE);
 148                 }
 149                 if (! more_elements) {
 150                         return (TRUE);  /* we are done */
 151                 }
 152                 /*
 153                  * the unfortunate side effect of non-recursion is that in
 154                  * the case of freeing we must remember the next object
 155                  * before we free the current object ...
 156                  */
 157                 if (freeing && *rp)
 158                         next = (*rp)->rpcb_next;
 159                 if (! xdr_reference(xdrs, (caddr_t *)rp,
 160                     (u_int)sizeof (rpcblist), (xdrproc_t)xdr_rpcb)) {
 161                         return (FALSE);
 162                 }
 163                 if (freeing) {
 164                         next_copy = next;
 165                         rp = &next_copy;
 166                         /*
 167                          * Note that in the subsequent iteration, next_copy
 168                          * gets nulled out by the xdr_reference
 169                          * but next itself survives.
 170                          */
 171                 } else if (*rp) {
 172                         rp = &((*rp)->rpcb_next);
 173                 }
 174         }
 175         /*NOTREACHED*/
 176 }
 177
 178 /*
 179  * xdr_rpcblist() is specified to take a RPCBLIST **, but is identical in
 180  * functionality to xdr_rpcblist_ptr().
 181  */
 182 bool_t
 183 xdr_rpcblist(xdrs, rp)
 184         XDR *xdrs;
 185         RPCBLIST **rp;
 186 {
 187         bool_t  dummy;
 188
 189         dummy = xdr_rpcblist_ptr(xdrs, (rpcblist_ptr *)rp);
 190         return (dummy);
 191 }
 192
 193
 194 bool_t
 195 xdr_rpcb_entry(xdrs, objp)
 196         XDR *xdrs;
 197         rpcb_entry *objp;
 198 {
 199
 200         _DIAGASSERT(objp != NULL);
 201
 202         if (!xdr_string(xdrs, &objp->r_maddr, (u_int)~0)) {
 203                 return (FALSE);
 204         }
 205         if (!xdr_string(xdrs, &objp->r_nc_netid, (u_int)~0)) {
 206                 return (FALSE);
 207         }
 208         if (!xdr_u_int32_t(xdrs, &objp->r_nc_semantics)) {
 209                 return (FALSE);
 210         }
 211         if (!xdr_string(xdrs, &objp->r_nc_protofmly, (u_int)~0)) {
 212                 return (FALSE);
 213         }
 214         if (!xdr_string(xdrs, &objp->r_nc_proto, (u_int)~0)) {
 215                 return (FALSE);
 216         }
 217         return (TRUE);
 218 }
 219
 220 bool_t
 221 xdr_rpcb_entry_list_ptr(xdrs, rp)
 222         XDR *xdrs;
 223         rpcb_entry_list_ptr *rp;
 224 {
 225         /*
 226          * more_elements is pre-computed in case the direction is
 227          * XDR_ENCODE or XDR_FREE.  more_elements is overwritten by
 228          * xdr_bool when the direction is XDR_DECODE.
 229          */
 230         bool_t more_elements;
 231         int freeing;
 232         rpcb_entry_list_ptr next;
 233         rpcb_entry_list_ptr next_copy;
 234
 235         _DIAGASSERT(xdrs != NULL);
 236         /* XXX: rp is allowed to be NULL ??? */
 237
 238         freeing = (xdrs->x_op == XDR_FREE);
 239         next = NULL;
 240
 241         for (;;) {
 242                 more_elements = (bool_t)(*rp != NULL);
 243                 if (! xdr_bool(xdrs, &more_elements)) {
 244                         return (FALSE);
 245                 }
 246                 if (! more_elements) {
 247                         return (TRUE);  /* we are done */
 248                 }
 249                 /*
 250                  * the unfortunate side effect of non-recursion is that in
 251                  * the case of freeing we must remember the next object
 252                  * before we free the current object ...
 253                  */
 254                 if (freeing && *rp)
 255                         next = (*rp)->rpcb_entry_next;
 256                 if (! xdr_reference(xdrs, (caddr_t *)rp,
 257                     (u_int)sizeof (rpcb_entry_list),
 258                                     (xdrproc_t)xdr_rpcb_entry)) {
 259                         return (FALSE);
 260                 }
 261                 if (freeing) {
 262                         next_copy = next;
 263                         rp = &next_copy;
 264                         /*
 265                          * Note that in the subsequent iteration, next_copy
 266                          * gets nulled out by the xdr_reference
 267                          * but next itself survives.
 268                          */
 269                 } else if (*rp) {
 270                         rp = &((*rp)->rpcb_entry_next);
 271                 }
 272         }
 273         /*NOTREACHED*/
 274 }
 275
 276 /*
 277  * XDR remote call arguments
 278  * written for XDR_ENCODE direction only
 279  */
 280 bool_t
 281 xdr_rpcb_rmtcallargs(xdrs, p)
 282         XDR *xdrs;
 283         struct rpcb_rmtcallargs *p;
 284 {
 285         struct r_rpcb_rmtcallargs *objp =
 286             (struct r_rpcb_rmtcallargs *)(void *)p;
 287         u_int lenposition, argposition, position;
 288         int32_t *buf;
 289
 290         _DIAGASSERT(p != NULL);
 291
 292         buf = XDR_INLINE(xdrs, 3 * BYTES_PER_XDR_UNIT);
 293         if (buf == NULL) {
 294                 if (!xdr_u_int32_t(xdrs, &objp->prog)) {
 295                         return (FALSE);
 296                 }
 297                 if (!xdr_u_int32_t(xdrs, &objp->vers)) {
 298                         return (FALSE);
 299                 }
 300                 if (!xdr_u_int32_t(xdrs, &objp->proc)) {
 301                         return (FALSE);
 302                 }
 303         } else {
 304                 IXDR_PUT_U_INT32(buf, objp->prog);
 305                 IXDR_PUT_U_INT32(buf, objp->vers);
 306                 IXDR_PUT_U_INT32(buf, objp->proc);
 307         }
 308
 309         /*
 310          * All the jugglery for just getting the size of the arguments
 311          */
 312         lenposition = XDR_GETPOS(xdrs);
 313         if (! xdr_u_int(xdrs, &(objp->args.args_len))) {
 314                 return (FALSE);
 315         }
 316         argposition = XDR_GETPOS(xdrs);
 317         if (! (*objp->xdr_args)(xdrs, objp->args.args_val)) {
 318                 return (FALSE);
 319         }
 320         position = XDR_GETPOS(xdrs);
 321         objp->args.args_len = (u_int)((u_long)position - (u_long)argposition);
 322         XDR_SETPOS(xdrs, lenposition);
 323         if (! xdr_u_int(xdrs, &(objp->args.args_len))) {
 324                 return (FALSE);
 325         }
 326         XDR_SETPOS(xdrs, position);
 327         return (TRUE);
 328 }
 329
 330 /*
 331  * XDR remote call results
 332  * written for XDR_DECODE direction only
 333  */
 334 bool_t
 335 xdr_rpcb_rmtcallres(xdrs, p)
 336         XDR *xdrs;
 337         struct rpcb_rmtcallres *p;
 338 {
 339         bool_t dummy;
 340         struct r_rpcb_rmtcallres *objp = (struct r_rpcb_rmtcallres *)(void *)p;
 341
 342         _DIAGASSERT(p != NULL);
 343
 344         if (!xdr_string(xdrs, &objp->addr, (u_int)~0)) {
 345                 return (FALSE);
 346         }
 347         if (!xdr_u_int(xdrs, &objp->results.results_len)) {
 348                 return (FALSE);
 349         }
 350         dummy = (*(objp->xdr_res))(xdrs, objp->results.results_val);
 351         return (dummy);
 352 }
 353
 354 bool_t
 355 xdr_netbuf(xdrs, objp)
 356         XDR *xdrs;
 357         struct netbuf *objp;
 358 {
 359         bool_t dummy;
 360
 361         _DIAGASSERT(objp != NULL);
 362
 363         if (!xdr_u_int32_t(xdrs, (u_int32_t *) &objp->maxlen)) {
 364                 return (FALSE);
 365         }
 366         dummy = xdr_bytes(xdrs, (char **)(void *)&(objp->buf),
 367                         (u_int *)&(objp->len), objp->maxlen);
 368         return (dummy);
 369 }