root/librpc/ndr/ndr.c

/* [<][>][^][v][top][bottom][index][help] */

DEFINITIONS

This source file includes following definitions.
  1. ndr_align_size
  2. ndr_pull_init_blob
  3. ndr_pull_advance
  4. ndr_pull_set_offset
  5. ndr_push_init_ctx
  6. ndr_push_blob
  7. ndr_push_expand
  8. ndr_print_debug_helper
  9. ndr_print_string_helper
  10. ndr_print_debug
  11. ndr_print_union_debug
  12. ndr_print_function_debug
  13. ndr_print_struct_string
  14. ndr_print_union_string
  15. ndr_print_function_string
  16. ndr_set_flags
  17. ndr_pull_error
  18. ndr_push_error
  19. ndr_pull_subcontext_start
  20. ndr_pull_subcontext_end
  21. ndr_push_subcontext_start
  22. ndr_push_subcontext_end
  23. ndr_token_store
  24. ndr_token_retrieve_cmp_fn
  25. ndr_token_retrieve
  26. ndr_token_peek
  27. ndr_pull_array_size
  28. ndr_get_array_size
  29. ndr_check_array_size
  30. ndr_pull_array_length
  31. ndr_get_array_length
  32. ndr_check_array_length
  33. ndr_push_set_switch_value
  34. ndr_pull_set_switch_value
  35. ndr_print_set_switch_value
  36. ndr_push_get_switch_value
  37. ndr_pull_get_switch_value
  38. ndr_print_get_switch_value
  39. ndr_pull_struct_blob
  40. ndr_pull_struct_blob_all
  41. ndr_pull_union_blob
  42. ndr_pull_union_blob_all
  43. ndr_push_struct_blob
  44. ndr_push_union_blob
  45. ndr_size_struct
  46. ndr_size_union
  47. ndr_push_get_relative_base_offset
  48. ndr_push_restore_relative_base_offset
  49. ndr_push_setup_relative_base_offset1
  50. ndr_push_setup_relative_base_offset2
  51. ndr_push_relative_ptr1
  52. ndr_push_relative_ptr2
  53. ndr_pull_get_relative_base_offset
  54. ndr_pull_restore_relative_base_offset
  55. ndr_pull_setup_relative_base_offset1
  56. ndr_pull_setup_relative_base_offset2
  57. ndr_pull_relative_ptr1
  58. ndr_pull_relative_ptr2
  59. ndr_map_error2string

   1 /* 
   2    Unix SMB/CIFS implementation.
   3 
   4    libndr interface
   5 
   6    Copyright (C) Andrew Tridgell 2003
   7    
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12    
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17    
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21 
  22 /*
  23   this provides the core routines for NDR parsing functions
  24 
  25   see http://www.opengroup.org/onlinepubs/9629399/chap14.htm for details
  26   of NDR encoding rules
  27 */
  28 
  29 #include "includes.h"
  30 #include "librpc/ndr/libndr.h"
  31 #include "../lib/util/dlinklist.h"
  32 #if _SAMBA_BUILD_ == 4
  33 #include "param/param.h"
  34 #endif
  35 
  36 #define NDR_BASE_MARSHALL_SIZE 1024
  37 
  38 /* this guid indicates NDR encoding in a protocol tower */
  39 const struct ndr_syntax_id ndr_transfer_syntax = {
  40   { 0x8a885d04, 0x1ceb, 0x11c9, {0x9f, 0xe8}, {0x08,0x00,0x2b,0x10,0x48,0x60} },
  41   2
  42 };
  43 
  44 const struct ndr_syntax_id ndr64_transfer_syntax = {
  45   { 0x71710533, 0xbeba, 0x4937, {0x83, 0x19}, {0xb5,0xdb,0xef,0x9c,0xcc,0x36} },
  46   1
  47 };
  48 
  49 /*
  50   work out the number of bytes needed to align on a n byte boundary
  51 */
  52 _PUBLIC_ size_t ndr_align_size(uint32_t offset, size_t n)
     /* [<][>][^][v][top][bottom][index][help] */
  53 {
  54         if ((offset & (n-1)) == 0) return 0;
  55         return n - (offset & (n-1));
  56 }
  57 
  58 /*
  59   initialise a ndr parse structure from a data blob
  60 */
  61 _PUBLIC_ struct ndr_pull *ndr_pull_init_blob(const DATA_BLOB *blob, TALLOC_CTX *mem_ctx, struct smb_iconv_convenience *iconv_convenience)
     /* [<][>][^][v][top][bottom][index][help] */
  62 {
  63         struct ndr_pull *ndr;
  64 
  65         ndr = talloc_zero(mem_ctx, struct ndr_pull);
  66         if (!ndr) return NULL;
  67         ndr->current_mem_ctx = mem_ctx;
  68 
  69         ndr->data = blob->data;
  70         ndr->data_size = blob->length;
  71         ndr->iconv_convenience = talloc_reference(ndr, iconv_convenience);
  72 
  73         return ndr;
  74 }
  75 
  76 /*
  77   advance by 'size' bytes
  78 */
  79 _PUBLIC_ enum ndr_err_code ndr_pull_advance(struct ndr_pull *ndr, uint32_t size)
     /* [<][>][^][v][top][bottom][index][help] */
  80 {
  81         ndr->offset += size;
  82         if (ndr->offset > ndr->data_size) {
  83                 return ndr_pull_error(ndr, NDR_ERR_BUFSIZE, 
  84                                       "ndr_pull_advance by %u failed",
  85                                       size);
  86         }
  87         return NDR_ERR_SUCCESS;
  88 }
  89 
  90 /*
  91   set the parse offset to 'ofs'
  92 */
  93 static enum ndr_err_code ndr_pull_set_offset(struct ndr_pull *ndr, uint32_t ofs)
     /* [<][>][^][v][top][bottom][index][help] */
  94 {
  95         ndr->offset = ofs;
  96         if (ndr->offset > ndr->data_size) {
  97                 return ndr_pull_error(ndr, NDR_ERR_BUFSIZE, 
  98                                       "ndr_pull_set_offset %u failed",
  99                                       ofs);
 100         }
 101         return NDR_ERR_SUCCESS;
 102 }
 103 
 104 /* create a ndr_push structure, ready for some marshalling */
 105 _PUBLIC_ struct ndr_push *ndr_push_init_ctx(TALLOC_CTX *mem_ctx, struct smb_iconv_convenience *iconv_convenience)
     /* [<][>][^][v][top][bottom][index][help] */
 106 {
 107         struct ndr_push *ndr;
 108 
 109         ndr = talloc_zero(mem_ctx, struct ndr_push);
 110         if (!ndr) {
 111                 return NULL;
 112         }
 113 
 114         ndr->flags = 0;
 115         ndr->alloc_size = NDR_BASE_MARSHALL_SIZE;
 116         ndr->data = talloc_array(ndr, uint8_t, ndr->alloc_size);
 117         if (!ndr->data) {
 118                 return NULL;
 119         }
 120         ndr->iconv_convenience = talloc_reference(ndr, iconv_convenience);
 121 
 122         return ndr;
 123 }
 124 
 125 /* return a DATA_BLOB structure for the current ndr_push marshalled data */
 126 _PUBLIC_ DATA_BLOB ndr_push_blob(struct ndr_push *ndr)
     /* [<][>][^][v][top][bottom][index][help] */
 127 {
 128         DATA_BLOB blob;
 129         blob = data_blob_const(ndr->data, ndr->offset);
 130         if (ndr->alloc_size > ndr->offset) {
 131                 ndr->data[ndr->offset] = 0;
 132         }
 133         return blob;
 134 }
 135 
 136 
 137 /*
 138   expand the available space in the buffer to ndr->offset + extra_size
 139 */
 140 _PUBLIC_ enum ndr_err_code ndr_push_expand(struct ndr_push *ndr, uint32_t extra_size)
     /* [<][>][^][v][top][bottom][index][help] */
 141 {
 142         uint32_t size = extra_size + ndr->offset;
 143 
 144         if (size < ndr->offset) {
 145                 /* extra_size overflowed the offset */
 146                 return ndr_push_error(ndr, NDR_ERR_BUFSIZE, "Overflow in push_expand to %u",
 147                                       size);
 148         }
 149 
 150         if (ndr->alloc_size > size) {
 151                 return NDR_ERR_SUCCESS;
 152         }
 153 
 154         ndr->alloc_size += NDR_BASE_MARSHALL_SIZE;
 155         if (size+1 > ndr->alloc_size) {
 156                 ndr->alloc_size = size+1;
 157         }
 158         ndr->data = talloc_realloc(ndr, ndr->data, uint8_t, ndr->alloc_size);
 159         if (!ndr->data) {
 160                 return ndr_push_error(ndr, NDR_ERR_ALLOC, "Failed to push_expand to %u",
 161                                       ndr->alloc_size);
 162         }
 163 
 164         return NDR_ERR_SUCCESS;
 165 }
 166 
 167 _PUBLIC_ void ndr_print_debug_helper(struct ndr_print *ndr, const char *format, ...) 
     /* [<][>][^][v][top][bottom][index][help] */
 168 {
 169         va_list ap;
 170         char *s = NULL;
 171         int i, ret;
 172 
 173         va_start(ap, format);
 174         ret = vasprintf(&s, format, ap);
 175         va_end(ap);
 176 
 177         if (ret == -1) {
 178                 return;
 179         }
 180 
 181         for (i=0;i<ndr->depth;i++) {
 182                 DEBUGADD(1,("    "));
 183         }
 184 
 185         DEBUGADD(1,("%s\n", s));
 186         free(s);
 187 }
 188 
 189 _PUBLIC_ void ndr_print_string_helper(struct ndr_print *ndr, const char *format, ...)
     /* [<][>][^][v][top][bottom][index][help] */
 190 {
 191         va_list ap;
 192         int i;
 193 
 194         for (i=0;i<ndr->depth;i++) {
 195                 ndr->private_data = talloc_asprintf_append_buffer(
 196                                         (char *)ndr->private_data, "    ");
 197         }
 198 
 199         va_start(ap, format);
 200         ndr->private_data = talloc_vasprintf_append_buffer((char *)ndr->private_data, 
 201                                                     format, ap);
 202         va_end(ap);
 203         ndr->private_data = talloc_asprintf_append_buffer((char *)ndr->private_data, 
 204                                                    "\n");
 205 }
 206 
 207 /*
 208   a useful helper function for printing idl structures via DEBUG()
 209 */
 210 _PUBLIC_ void ndr_print_debug(ndr_print_fn_t fn, const char *name, void *ptr)
     /* [<][>][^][v][top][bottom][index][help] */
 211 {
 212         struct ndr_print *ndr;
 213 
 214         DEBUG(1,(" "));
 215 
 216         ndr = talloc_zero(NULL, struct ndr_print);
 217         if (!ndr) return;
 218         ndr->print = ndr_print_debug_helper;
 219         ndr->depth = 1;
 220         ndr->flags = 0;
 221         fn(ndr, name, ptr);
 222         talloc_free(ndr);
 223 }
 224 
 225 /*
 226   a useful helper function for printing idl unions via DEBUG()
 227 */
 228 _PUBLIC_ void ndr_print_union_debug(ndr_print_fn_t fn, const char *name, uint32_t level, void *ptr)
     /* [<][>][^][v][top][bottom][index][help] */
 229 {
 230         struct ndr_print *ndr;
 231 
 232         DEBUG(1,(" "));
 233 
 234         ndr = talloc_zero(NULL, struct ndr_print);
 235         if (!ndr) return;
 236         ndr->print = ndr_print_debug_helper;
 237         ndr->depth = 1;
 238         ndr->flags = 0;
 239         ndr_print_set_switch_value(ndr, ptr, level);
 240         fn(ndr, name, ptr);
 241         talloc_free(ndr);
 242 }
 243 
 244 /*
 245   a useful helper function for printing idl function calls via DEBUG()
 246 */
 247 _PUBLIC_ void ndr_print_function_debug(ndr_print_function_t fn, const char *name, int flags, void *ptr)
     /* [<][>][^][v][top][bottom][index][help] */
 248 {
 249         struct ndr_print *ndr;
 250 
 251         DEBUG(1,(" "));
 252 
 253         ndr = talloc_zero(NULL, struct ndr_print);
 254         if (!ndr) return;
 255         ndr->print = ndr_print_debug_helper;
 256         ndr->depth = 1;
 257         ndr->flags = 0;
 258         fn(ndr, name, flags, ptr);
 259         talloc_free(ndr);
 260 }
 261 
 262 /*
 263   a useful helper function for printing idl structures to a string
 264 */
 265 _PUBLIC_ char *ndr_print_struct_string(TALLOC_CTX *mem_ctx, ndr_print_fn_t fn, const char *name, void *ptr)
     /* [<][>][^][v][top][bottom][index][help] */
 266 {
 267         struct ndr_print *ndr;
 268         char *ret = NULL;
 269 
 270         ndr = talloc_zero(mem_ctx, struct ndr_print);
 271         if (!ndr) return NULL;
 272         ndr->private_data = talloc_strdup(ndr, "");
 273         if (!ndr->private_data) {
 274                 goto failed;
 275         }
 276         ndr->print = ndr_print_string_helper;
 277         ndr->depth = 1;
 278         ndr->flags = 0;
 279         fn(ndr, name, ptr);
 280         ret = talloc_steal(mem_ctx, (char *)ndr->private_data);
 281 failed:
 282         talloc_free(ndr);
 283         return ret;
 284 }
 285 
 286 /*
 287   a useful helper function for printing idl unions to a string
 288 */
 289 _PUBLIC_ char *ndr_print_union_string(TALLOC_CTX *mem_ctx, ndr_print_fn_t fn, const char *name, uint32_t level, void *ptr)
     /* [<][>][^][v][top][bottom][index][help] */
 290 {
 291         struct ndr_print *ndr;
 292         char *ret = NULL;
 293 
 294         ndr = talloc_zero(mem_ctx, struct ndr_print);
 295         if (!ndr) return NULL;
 296         ndr->private_data = talloc_strdup(ndr, "");
 297         if (!ndr->private_data) {
 298                 goto failed;
 299         }
 300         ndr->print = ndr_print_string_helper;
 301         ndr->depth = 1;
 302         ndr->flags = 0;
 303         ndr_print_set_switch_value(ndr, ptr, level);
 304         fn(ndr, name, ptr);
 305         ret = talloc_steal(mem_ctx, (char *)ndr->private_data);
 306 failed:
 307         talloc_free(ndr);
 308         return ret;
 309 }
 310 
 311 /*
 312   a useful helper function for printing idl function calls to a string
 313 */
 314 _PUBLIC_ char *ndr_print_function_string(TALLOC_CTX *mem_ctx,
     /* [<][>][^][v][top][bottom][index][help] */
 315                                 ndr_print_function_t fn, const char *name, 
 316                                 int flags, void *ptr)
 317 {
 318         struct ndr_print *ndr;
 319         char *ret = NULL;
 320 
 321         ndr = talloc_zero(mem_ctx, struct ndr_print);
 322         if (!ndr) return NULL;
 323         ndr->private_data = talloc_strdup(ndr, "");
 324         if (!ndr->private_data) {
 325                 goto failed;
 326         }
 327         ndr->print = ndr_print_string_helper;
 328         ndr->depth = 1;
 329         ndr->flags = 0;
 330         fn(ndr, name, flags, ptr);
 331         ret = talloc_steal(mem_ctx, (char *)ndr->private_data);
 332 failed:
 333         talloc_free(ndr);
 334         return ret;
 335 }
 336 
 337 _PUBLIC_ void ndr_set_flags(uint32_t *pflags, uint32_t new_flags)
     /* [<][>][^][v][top][bottom][index][help] */
 338 {
 339         /* the big/little endian flags are inter-dependent */
 340         if (new_flags & LIBNDR_FLAG_LITTLE_ENDIAN) {
 341                 (*pflags) &= ~LIBNDR_FLAG_BIGENDIAN;
 342         }
 343         if (new_flags & LIBNDR_FLAG_BIGENDIAN) {
 344                 (*pflags) &= ~LIBNDR_FLAG_LITTLE_ENDIAN;
 345         }
 346         if (new_flags & LIBNDR_FLAG_REMAINING) {
 347                 (*pflags) &= ~LIBNDR_ALIGN_FLAGS;
 348         }
 349         if (new_flags & LIBNDR_ALIGN_FLAGS) {
 350                 (*pflags) &= ~LIBNDR_FLAG_REMAINING;
 351         }
 352         (*pflags) |= new_flags;
 353 }
 354 
 355 /*
 356   return and possibly log an NDR error
 357 */
 358 _PUBLIC_ enum ndr_err_code ndr_pull_error(struct ndr_pull *ndr,
     /* [<][>][^][v][top][bottom][index][help] */
 359                                  enum ndr_err_code ndr_err,
 360                                  const char *format, ...)
 361 {
 362         char *s=NULL;
 363         va_list ap;
 364         int ret;
 365 
 366         va_start(ap, format);
 367         ret = vasprintf(&s, format, ap);
 368         va_end(ap);
 369 
 370         if (ret == -1) {
 371                 return NDR_ERR_ALLOC;
 372         }
 373 
 374         DEBUG(1,("ndr_pull_error(%u): %s\n", ndr_err, s));
 375 
 376         free(s);
 377 
 378         return ndr_err;
 379 }
 380 
 381 /*
 382   return and possibly log an NDR error
 383 */
 384 _PUBLIC_ enum ndr_err_code ndr_push_error(struct ndr_push *ndr,
     /* [<][>][^][v][top][bottom][index][help] */
 385                                  enum ndr_err_code ndr_err,
 386                                  const char *format, ...) 
 387 {
 388         char *s=NULL;
 389         va_list ap;
 390         int ret;
 391 
 392         va_start(ap, format);
 393         ret = vasprintf(&s, format, ap);
 394         va_end(ap);
 395 
 396         if (ret == -1) {
 397                 return NDR_ERR_ALLOC;
 398         }
 399 
 400         DEBUG(1,("ndr_push_error(%u): %s\n", ndr_err, s));
 401 
 402         free(s);
 403 
 404         return ndr_err;
 405 }
 406 
 407 /*
 408   handle subcontext buffers, which in midl land are user-marshalled, but
 409   we use magic in pidl to make them easier to cope with
 410 */
 411 _PUBLIC_ enum ndr_err_code ndr_pull_subcontext_start(struct ndr_pull *ndr,
     /* [<][>][^][v][top][bottom][index][help] */
 412                                    struct ndr_pull **_subndr,
 413                                    size_t header_size,
 414                                    ssize_t size_is)
 415 {
 416         struct ndr_pull *subndr;
 417         uint32_t r_content_size;
 418         bool force_le = false;
 419         bool force_be = false;
 420 
 421         switch (header_size) {
 422         case 0: {
 423                 uint32_t content_size = ndr->data_size - ndr->offset;
 424                 if (size_is >= 0) {
 425                         content_size = size_is;
 426                 }
 427                 r_content_size = content_size;
 428                 break;
 429         }
 430 
 431         case 2: {
 432                 uint16_t content_size;
 433                 NDR_CHECK(ndr_pull_uint16(ndr, NDR_SCALARS, &content_size));
 434                 if (size_is >= 0 && size_is != content_size) {
 435                         return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext (PULL) size_is(%d) mismatch content_size %d", 
 436                                                 (int)size_is, (int)content_size);
 437                 }
 438                 r_content_size = content_size;
 439                 break;
 440         }
 441 
 442         case 4: {
 443                 uint32_t content_size;
 444                 NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &content_size));
 445                 if (size_is >= 0 && size_is != content_size) {
 446                         return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext (PULL) size_is(%d) mismatch content_size %d", 
 447                                                 (int)size_is, (int)content_size);
 448                 }
 449                 r_content_size = content_size;
 450                 break;
 451         }
 452         case 0xFFFFFC01: {
 453                 /*
 454                  * Common Type Header for the Serialization Stream
 455                  * See [MS-RPCE] 2.2.6 Type Serialization Version 1
 456                  */
 457                 uint8_t version;
 458                 uint8_t drep;
 459                 uint16_t hdrlen;
 460                 uint32_t filler;
 461                 uint32_t content_size;
 462                 uint32_t reserved;
 463 
 464                 /* version */
 465                 NDR_CHECK(ndr_pull_uint8(ndr, NDR_SCALARS, &version));
 466 
 467                 if (version != 1) {
 468                         return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT,
 469                                               "Bad subcontext (PULL) Common Type Header version %d != 1",
 470                                               (int)version);
 471                 }
 472 
 473                 /*
 474                  * 0x10 little endian
 475                  * 0x00 big endian
 476                  */
 477                 NDR_CHECK(ndr_pull_uint8(ndr, NDR_SCALARS, &drep));
 478                 if (drep == 0x10) {
 479                         force_le = true;
 480                 } else if (drep == 0x00) {
 481                         force_be = true;
 482                 } else {
 483                         return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT,
 484                                               "Bad subcontext (PULL) Common Type Header invalid drep 0x%02X",
 485                                               (unsigned int)drep);
 486                 }
 487 
 488                 /* length of the "Private Header for Constructed Type" */
 489                 NDR_CHECK(ndr_pull_uint16(ndr, NDR_SCALARS, &hdrlen));
 490                 if (hdrlen != 8) {
 491                         return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT,
 492                                               "Bad subcontext (PULL) Common Type Header length %d != 8",
 493                                               (int)hdrlen);
 494                 }
 495 
 496                 /* filler should be ignored */
 497                 NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &filler));
 498 
 499                 /*
 500                  * Private Header for Constructed Type
 501                  */
 502                 /* length - will be updated latter */
 503                 NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &content_size));
 504                 if (size_is >= 0 && size_is != content_size) {
 505                         return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext (PULL) size_is(%d) mismatch content_size %d",
 506                                               (int)size_is, (int)content_size);
 507                 }
 508                 /* the content size must be a multiple of 8 */
 509                 if ((content_size % 8) != 0) {
 510                         return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT,
 511                                               "Bad subcontext (PULL) size_is(%d) not padded to 8 content_size %d",
 512                                               (int)size_is, (int)content_size);
 513                 }
 514                 r_content_size = content_size;
 515 
 516                 /* reserved */
 517                 NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &reserved));
 518                 break;
 519         }
 520         default:
 521                 return ndr_pull_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext (PULL) header_size %d", 
 522                                       (int)header_size);
 523         }
 524 
 525         NDR_PULL_NEED_BYTES(ndr, r_content_size);
 526 
 527         subndr = talloc_zero(ndr, struct ndr_pull);
 528         NDR_ERR_HAVE_NO_MEMORY(subndr);
 529         subndr->flags           = ndr->flags;
 530         subndr->current_mem_ctx = ndr->current_mem_ctx;
 531 
 532         subndr->data = ndr->data + ndr->offset;
 533         subndr->offset = 0;
 534         subndr->data_size = r_content_size;
 535         subndr->iconv_convenience = talloc_reference(subndr, ndr->iconv_convenience);
 536 
 537         if (force_le) {
 538                 ndr_set_flags(&ndr->flags, LIBNDR_FLAG_LITTLE_ENDIAN);
 539         } else if (force_be) {
 540                 ndr_set_flags(&ndr->flags, LIBNDR_FLAG_BIGENDIAN);
 541         }
 542 
 543         *_subndr = subndr;
 544         return NDR_ERR_SUCCESS;
 545 }
 546 
 547 _PUBLIC_ enum ndr_err_code ndr_pull_subcontext_end(struct ndr_pull *ndr,
     /* [<][>][^][v][top][bottom][index][help] */
 548                                  struct ndr_pull *subndr,
 549                                  size_t header_size,
 550                                  ssize_t size_is)
 551 {
 552         uint32_t advance;
 553         if (size_is >= 0) {
 554                 advance = size_is;
 555         } else if (header_size > 0) {
 556                 advance = subndr->data_size;
 557         } else {
 558                 advance = subndr->offset;
 559         }
 560         NDR_CHECK(ndr_pull_advance(ndr, advance));
 561         return NDR_ERR_SUCCESS;
 562 }
 563 
 564 _PUBLIC_ enum ndr_err_code ndr_push_subcontext_start(struct ndr_push *ndr,
     /* [<][>][^][v][top][bottom][index][help] */
 565                                    struct ndr_push **_subndr,
 566                                    size_t header_size,
 567                                    ssize_t size_is)
 568 {
 569         struct ndr_push *subndr;
 570 
 571         subndr = ndr_push_init_ctx(ndr, ndr->iconv_convenience);
 572         NDR_ERR_HAVE_NO_MEMORY(subndr);
 573         subndr->flags   = ndr->flags;
 574 
 575         *_subndr = subndr;
 576         return NDR_ERR_SUCCESS;
 577 }
 578 
 579 /*
 580   push a subcontext header 
 581 */
 582 _PUBLIC_ enum ndr_err_code ndr_push_subcontext_end(struct ndr_push *ndr,
     /* [<][>][^][v][top][bottom][index][help] */
 583                                  struct ndr_push *subndr,
 584                                  size_t header_size,
 585                                  ssize_t size_is)
 586 {
 587         ssize_t padding_len;
 588 
 589         if (size_is >= 0) {
 590                 padding_len = size_is - subndr->offset;
 591                 if (padding_len > 0) {
 592                         NDR_CHECK(ndr_push_zero(subndr, padding_len));
 593                 } else if (padding_len < 0) {
 594                         return ndr_push_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext (PUSH) content_size %d is larger than size_is(%d)",
 595                                               (int)subndr->offset, (int)size_is);
 596                 }
 597         }
 598 
 599         switch (header_size) {
 600         case 0: 
 601                 break;
 602 
 603         case 2: 
 604                 NDR_CHECK(ndr_push_uint16(ndr, NDR_SCALARS, subndr->offset));
 605                 break;
 606 
 607         case 4: 
 608                 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, subndr->offset));
 609                 break;
 610 
 611         case 0xFFFFFC01:
 612                 /*
 613                  * Common Type Header for the Serialization Stream
 614                  * See [MS-RPCE] 2.2.6 Type Serialization Version 1
 615                  */
 616                 padding_len = NDR_ROUND(subndr->offset, 8) - subndr->offset;
 617                 if (padding_len > 0) {
 618                         NDR_CHECK(ndr_push_zero(subndr, padding_len));
 619                 }
 620 
 621                 /* version */
 622                 NDR_CHECK(ndr_push_uint8(ndr, NDR_SCALARS, 1));
 623 
 624                 /*
 625                  * 0x10 little endian
 626                  * 0x00 big endian
 627                  */
 628                 NDR_CHECK(ndr_push_uint8(ndr, NDR_SCALARS, NDR_BE(ndr)?0x00:0x10));
 629 
 630                 /* length of the "Private Header for Constructed Type" */
 631                 NDR_CHECK(ndr_push_uint16(ndr, NDR_SCALARS, 8));
 632 
 633                 /* filler */
 634                 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, 0xCCCCCCCC));
 635 
 636                 /*
 637                  * Private Header for Constructed Type
 638                  */
 639                 /* length - will be updated latter */
 640                 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, subndr->offset));
 641 
 642                 /* reserved */
 643                 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, 0));
 644                 break;
 645 
 646         default:
 647                 return ndr_push_error(ndr, NDR_ERR_SUBCONTEXT, "Bad subcontext header size %d", 
 648                                       (int)header_size);
 649         }
 650 
 651         NDR_CHECK(ndr_push_bytes(ndr, subndr->data, subndr->offset));
 652         return NDR_ERR_SUCCESS;
 653 }
 654 
 655 /*
 656   store a token in the ndr context, for later retrieval
 657 */
 658 _PUBLIC_ enum ndr_err_code ndr_token_store(TALLOC_CTX *mem_ctx,
     /* [<][>][^][v][top][bottom][index][help] */
 659                          struct ndr_token_list **list, 
 660                          const void *key, 
 661                          uint32_t value)
 662 {
 663         struct ndr_token_list *tok;
 664         tok = talloc(mem_ctx, struct ndr_token_list);
 665         NDR_ERR_HAVE_NO_MEMORY(tok);
 666         tok->key = key;
 667         tok->value = value;
 668         DLIST_ADD((*list), tok);
 669         return NDR_ERR_SUCCESS;
 670 }
 671 
 672 /*
 673   retrieve a token from a ndr context, using cmp_fn to match the tokens
 674 */
 675 _PUBLIC_ enum ndr_err_code ndr_token_retrieve_cmp_fn(struct ndr_token_list **list, const void *key, uint32_t *v,
     /* [<][>][^][v][top][bottom][index][help] */
 676                                    comparison_fn_t _cmp_fn, bool _remove_tok)
 677 {
 678         struct ndr_token_list *tok;
 679         for (tok=*list;tok;tok=tok->next) {
 680                 if (_cmp_fn && _cmp_fn(tok->key,key)==0) goto found;
 681                 else if (!_cmp_fn && tok->key == key) goto found;
 682         }
 683         return NDR_ERR_TOKEN;
 684 found:
 685         *v = tok->value;
 686         if (_remove_tok) {
 687                 DLIST_REMOVE((*list), tok);
 688                 talloc_free(tok);
 689         }
 690         return NDR_ERR_SUCCESS;
 691 }
 692 
 693 /*
 694   retrieve a token from a ndr context
 695 */
 696 _PUBLIC_ enum ndr_err_code ndr_token_retrieve(struct ndr_token_list **list, const void *key, uint32_t *v)
     /* [<][>][^][v][top][bottom][index][help] */
 697 {
 698         return ndr_token_retrieve_cmp_fn(list, key, v, NULL, true);
 699 }
 700 
 701 /*
 702   peek at but don't removed a token from a ndr context
 703 */
 704 _PUBLIC_ uint32_t ndr_token_peek(struct ndr_token_list **list, const void *key)
     /* [<][>][^][v][top][bottom][index][help] */
 705 {
 706         enum ndr_err_code status;
 707         uint32_t v;
 708 
 709         status = ndr_token_retrieve_cmp_fn(list, key, &v, NULL, false);
 710         if (!NDR_ERR_CODE_IS_SUCCESS(status)) {
 711                 return 0;
 712         }
 713 
 714         return v;
 715 }
 716 
 717 /*
 718   pull an array size field and add it to the array_size_list token list
 719 */
 720 _PUBLIC_ enum ndr_err_code ndr_pull_array_size(struct ndr_pull *ndr, const void *p)
     /* [<][>][^][v][top][bottom][index][help] */
 721 {
 722         uint32_t size;
 723         NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &size));
 724         return ndr_token_store(ndr, &ndr->array_size_list, p, size);
 725 }
 726 
 727 /*
 728   get the stored array size field
 729 */
 730 _PUBLIC_ uint32_t ndr_get_array_size(struct ndr_pull *ndr, const void *p)
     /* [<][>][^][v][top][bottom][index][help] */
 731 {
 732         return ndr_token_peek(&ndr->array_size_list, p);
 733 }
 734 
 735 /*
 736   check the stored array size field
 737 */
 738 _PUBLIC_ enum ndr_err_code ndr_check_array_size(struct ndr_pull *ndr, void *p, uint32_t size)
     /* [<][>][^][v][top][bottom][index][help] */
 739 {
 740         uint32_t stored;
 741         stored = ndr_token_peek(&ndr->array_size_list, p);
 742         if (stored != size) {
 743                 return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE, 
 744                                       "Bad array size - got %u expected %u\n",
 745                                       stored, size);
 746         }
 747         return NDR_ERR_SUCCESS;
 748 }
 749 
 750 /*
 751   pull an array length field and add it to the array_length_list token list
 752 */
 753 _PUBLIC_ enum ndr_err_code ndr_pull_array_length(struct ndr_pull *ndr, const void *p)
     /* [<][>][^][v][top][bottom][index][help] */
 754 {
 755         uint32_t length, offset;
 756         NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &offset));
 757         if (offset != 0) {
 758                 return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE, 
 759                                       "non-zero array offset %u\n", offset);
 760         }
 761         NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &length));
 762         return ndr_token_store(ndr, &ndr->array_length_list, p, length);
 763 }
 764 
 765 /*
 766   get the stored array length field
 767 */
 768 _PUBLIC_ uint32_t ndr_get_array_length(struct ndr_pull *ndr, const void *p)
     /* [<][>][^][v][top][bottom][index][help] */
 769 {
 770         return ndr_token_peek(&ndr->array_length_list, p);
 771 }
 772 
 773 /*
 774   check the stored array length field
 775 */
 776 _PUBLIC_ enum ndr_err_code ndr_check_array_length(struct ndr_pull *ndr, void *p, uint32_t length)
     /* [<][>][^][v][top][bottom][index][help] */
 777 {
 778         uint32_t stored;
 779         stored = ndr_token_peek(&ndr->array_length_list, p);
 780         if (stored != length) {
 781                 return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE, 
 782                                       "Bad array length - got %u expected %u\n",
 783                                       stored, length);
 784         }
 785         return NDR_ERR_SUCCESS;
 786 }
 787 
 788 /*
 789   store a switch value
 790  */
 791 _PUBLIC_ enum ndr_err_code ndr_push_set_switch_value(struct ndr_push *ndr, const void *p, uint32_t val)
     /* [<][>][^][v][top][bottom][index][help] */
 792 {
 793         return ndr_token_store(ndr, &ndr->switch_list, p, val);
 794 }
 795 
 796 _PUBLIC_ enum ndr_err_code ndr_pull_set_switch_value(struct ndr_pull *ndr, const void *p, uint32_t val)
     /* [<][>][^][v][top][bottom][index][help] */
 797 {
 798         return ndr_token_store(ndr, &ndr->switch_list, p, val);
 799 }
 800 
 801 _PUBLIC_ enum ndr_err_code ndr_print_set_switch_value(struct ndr_print *ndr, const void *p, uint32_t val)
     /* [<][>][^][v][top][bottom][index][help] */
 802 {
 803         return ndr_token_store(ndr, &ndr->switch_list, p, val);
 804 }
 805 
 806 /*
 807   retrieve a switch value
 808  */
 809 _PUBLIC_ uint32_t ndr_push_get_switch_value(struct ndr_push *ndr, const void *p)
     /* [<][>][^][v][top][bottom][index][help] */
 810 {
 811         return ndr_token_peek(&ndr->switch_list, p);
 812 }
 813 
 814 _PUBLIC_ uint32_t ndr_pull_get_switch_value(struct ndr_pull *ndr, const void *p)
     /* [<][>][^][v][top][bottom][index][help] */
 815 {
 816         return ndr_token_peek(&ndr->switch_list, p);
 817 }
 818 
 819 _PUBLIC_ uint32_t ndr_print_get_switch_value(struct ndr_print *ndr, const void *p)
     /* [<][>][^][v][top][bottom][index][help] */
 820 {
 821         return ndr_token_peek(&ndr->switch_list, p);
 822 }
 823 
 824 /*
 825   pull a struct from a blob using NDR
 826 */
 827 _PUBLIC_ enum ndr_err_code ndr_pull_struct_blob(const DATA_BLOB *blob, TALLOC_CTX *mem_ctx, struct smb_iconv_convenience *iconv_convenience, void *p,
     /* [<][>][^][v][top][bottom][index][help] */
 828                               ndr_pull_flags_fn_t fn)
 829 {
 830         struct ndr_pull *ndr;
 831         ndr = ndr_pull_init_blob(blob, mem_ctx, iconv_convenience);
 832         NDR_ERR_HAVE_NO_MEMORY(ndr);
 833         NDR_CHECK(fn(ndr, NDR_SCALARS|NDR_BUFFERS, p));
 834         return NDR_ERR_SUCCESS;
 835 }
 836 
 837 /*
 838   pull a struct from a blob using NDR - failing if all bytes are not consumed
 839 */
 840 _PUBLIC_ enum ndr_err_code ndr_pull_struct_blob_all(const DATA_BLOB *blob, TALLOC_CTX *mem_ctx, 
     /* [<][>][^][v][top][bottom][index][help] */
 841                                                     struct smb_iconv_convenience *iconv_convenience,
 842                                                     void *p, ndr_pull_flags_fn_t fn)
 843 {
 844         struct ndr_pull *ndr;
 845         ndr = ndr_pull_init_blob(blob, mem_ctx, iconv_convenience);
 846         NDR_ERR_HAVE_NO_MEMORY(ndr);
 847         NDR_CHECK(fn(ndr, NDR_SCALARS|NDR_BUFFERS, p));
 848         if (ndr->offset < ndr->data_size) {
 849                 return ndr_pull_error(ndr, NDR_ERR_UNREAD_BYTES,
 850                                       "not all bytes consumed ofs[%u] size[%u]",
 851                                       ndr->offset, ndr->data_size);
 852         }
 853         return NDR_ERR_SUCCESS;
 854 }
 855 
 856 /*
 857   pull a union from a blob using NDR, given the union discriminator
 858 */
 859 _PUBLIC_ enum ndr_err_code ndr_pull_union_blob(const DATA_BLOB *blob, TALLOC_CTX *mem_ctx, 
     /* [<][>][^][v][top][bottom][index][help] */
 860                                                struct smb_iconv_convenience *iconv_convenience, void *p,
 861                              uint32_t level, ndr_pull_flags_fn_t fn)
 862 {
 863         struct ndr_pull *ndr;
 864         ndr = ndr_pull_init_blob(blob, mem_ctx, iconv_convenience);
 865         NDR_ERR_HAVE_NO_MEMORY(ndr);
 866         NDR_CHECK(ndr_pull_set_switch_value(ndr, p, level));
 867         NDR_CHECK(fn(ndr, NDR_SCALARS|NDR_BUFFERS, p));
 868         return NDR_ERR_SUCCESS;
 869 }
 870 
 871 /*
 872   pull a union from a blob using NDR, given the union discriminator,
 873   failing if all bytes are not consumed
 874 */
 875 _PUBLIC_ enum ndr_err_code ndr_pull_union_blob_all(const DATA_BLOB *blob, TALLOC_CTX *mem_ctx, 
     /* [<][>][^][v][top][bottom][index][help] */
 876                                                    struct smb_iconv_convenience *iconv_convenience, void *p,
 877                              uint32_t level, ndr_pull_flags_fn_t fn)
 878 {
 879         struct ndr_pull *ndr;
 880         ndr = ndr_pull_init_blob(blob, mem_ctx, iconv_convenience);
 881         NDR_ERR_HAVE_NO_MEMORY(ndr);
 882         NDR_CHECK(ndr_pull_set_switch_value(ndr, p, level));
 883         NDR_CHECK(fn(ndr, NDR_SCALARS|NDR_BUFFERS, p));
 884         if (ndr->offset < ndr->data_size) {
 885                 return ndr_pull_error(ndr, NDR_ERR_UNREAD_BYTES,
 886                                       "not all bytes consumed ofs[%u] size[%u]",
 887                                       ndr->offset, ndr->data_size);
 888         }
 889         return NDR_ERR_SUCCESS;
 890 }
 891 
 892 /*
 893   push a struct to a blob using NDR
 894 */
 895 _PUBLIC_ enum ndr_err_code ndr_push_struct_blob(DATA_BLOB *blob, TALLOC_CTX *mem_ctx, struct smb_iconv_convenience *iconv_convenience, const void *p, ndr_push_flags_fn_t fn)
     /* [<][>][^][v][top][bottom][index][help] */
 896 {
 897         struct ndr_push *ndr;
 898         ndr = ndr_push_init_ctx(mem_ctx, iconv_convenience);
 899         NDR_ERR_HAVE_NO_MEMORY(ndr);
 900 
 901         NDR_CHECK(fn(ndr, NDR_SCALARS|NDR_BUFFERS, p));
 902 
 903         *blob = ndr_push_blob(ndr);
 904         talloc_steal(mem_ctx, blob->data);
 905         talloc_free(ndr);
 906 
 907         return NDR_ERR_SUCCESS;
 908 }
 909 
 910 /*
 911   push a union to a blob using NDR
 912 */
 913 _PUBLIC_ enum ndr_err_code ndr_push_union_blob(DATA_BLOB *blob, TALLOC_CTX *mem_ctx, struct smb_iconv_convenience *iconv_convenience, void *p,
     /* [<][>][^][v][top][bottom][index][help] */
 914                              uint32_t level, ndr_push_flags_fn_t fn)
 915 {
 916         struct ndr_push *ndr;
 917         ndr = ndr_push_init_ctx(mem_ctx, iconv_convenience);
 918         NDR_ERR_HAVE_NO_MEMORY(ndr);
 919 
 920         NDR_CHECK(ndr_push_set_switch_value(ndr, p, level));
 921         NDR_CHECK(fn(ndr, NDR_SCALARS|NDR_BUFFERS, p));
 922 
 923         *blob = ndr_push_blob(ndr);
 924         talloc_steal(mem_ctx, blob->data);
 925         talloc_free(ndr);
 926 
 927         return NDR_ERR_SUCCESS;
 928 }
 929 
 930 /*
 931   generic ndr_size_*() handler for structures
 932 */
 933 _PUBLIC_ size_t ndr_size_struct(const void *p, int flags, ndr_push_flags_fn_t push, struct smb_iconv_convenience *iconv_convenience)
     /* [<][>][^][v][top][bottom][index][help] */
 934 {
 935         struct ndr_push *ndr;
 936         enum ndr_err_code status;
 937         size_t ret;
 938 
 939         /* avoid recursion */
 940         if (flags & LIBNDR_FLAG_NO_NDR_SIZE) return 0;
 941 
 942         ndr = ndr_push_init_ctx(NULL, iconv_convenience);
 943         if (!ndr) return 0;
 944         ndr->flags |= flags | LIBNDR_FLAG_NO_NDR_SIZE;
 945         status = push(ndr, NDR_SCALARS|NDR_BUFFERS, discard_const(p));
 946         if (!NDR_ERR_CODE_IS_SUCCESS(status)) {
 947                 talloc_free(ndr);
 948                 return 0;
 949         }
 950         ret = ndr->offset;
 951         talloc_free(ndr);
 952         return ret;
 953 }
 954 
 955 /*
 956   generic ndr_size_*() handler for unions
 957 */
 958 _PUBLIC_ size_t ndr_size_union(const void *p, int flags, uint32_t level, ndr_push_flags_fn_t push, struct smb_iconv_convenience *iconv_convenience)
     /* [<][>][^][v][top][bottom][index][help] */
 959 {
 960         struct ndr_push *ndr;
 961         enum ndr_err_code status;
 962         size_t ret;
 963 
 964         /* avoid recursion */
 965         if (flags & LIBNDR_FLAG_NO_NDR_SIZE) return 0;
 966 
 967         ndr = ndr_push_init_ctx(NULL, iconv_convenience);
 968         if (!ndr) return 0;
 969         ndr->flags |= flags | LIBNDR_FLAG_NO_NDR_SIZE;
 970 
 971         status = ndr_push_set_switch_value(ndr, p, level);
 972         if (!NDR_ERR_CODE_IS_SUCCESS(status)) {
 973                 talloc_free(ndr);
 974                 return 0;
 975         }
 976         status = push(ndr, NDR_SCALARS|NDR_BUFFERS, p);
 977         if (!NDR_ERR_CODE_IS_SUCCESS(status)) {
 978                 talloc_free(ndr);
 979                 return 0;
 980         }
 981         ret = ndr->offset;
 982         talloc_free(ndr);
 983         return ret;
 984 }
 985 
 986 /*
 987   get the current base for relative pointers for the push
 988 */
 989 _PUBLIC_ uint32_t ndr_push_get_relative_base_offset(struct ndr_push *ndr)
     /* [<][>][^][v][top][bottom][index][help] */
 990 {
 991         return ndr->relative_base_offset;
 992 }
 993 
 994 /*
 995   restore the old base for relative pointers for the push
 996 */
 997 _PUBLIC_ void ndr_push_restore_relative_base_offset(struct ndr_push *ndr, uint32_t offset)
     /* [<][>][^][v][top][bottom][index][help] */
 998 {
 999         ndr->relative_base_offset = offset;
1000 }
1001 
1002 /*
1003   setup the current base for relative pointers for the push
1004   called in the NDR_SCALAR stage
1005 */
1006 _PUBLIC_ enum ndr_err_code ndr_push_setup_relative_base_offset1(struct ndr_push *ndr, const void *p, uint32_t offset)
     /* [<][>][^][v][top][bottom][index][help] */
1007 {
1008         ndr->relative_base_offset = offset;
1009         return ndr_token_store(ndr, &ndr->relative_base_list, p, offset);
1010 }
1011 
1012 /*
1013   setup the current base for relative pointers for the push
1014   called in the NDR_BUFFERS stage
1015 */
1016 _PUBLIC_ enum ndr_err_code ndr_push_setup_relative_base_offset2(struct ndr_push *ndr, const void *p)
     /* [<][>][^][v][top][bottom][index][help] */
1017 {
1018         return ndr_token_retrieve(&ndr->relative_base_list, p, &ndr->relative_base_offset);
1019 }
1020 
1021 /*
1022   push a relative object - stage1
1023   this is called during SCALARS processing
1024 */
1025 _PUBLIC_ enum ndr_err_code ndr_push_relative_ptr1(struct ndr_push *ndr, const void *p)
     /* [<][>][^][v][top][bottom][index][help] */
1026 {
1027         if (p == NULL) {
1028                 NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, 0));
1029                 return NDR_ERR_SUCCESS;
1030         }
1031         NDR_CHECK(ndr_push_align(ndr, 4));
1032         NDR_CHECK(ndr_token_store(ndr, &ndr->relative_list, p, ndr->offset));
1033         return ndr_push_uint32(ndr, NDR_SCALARS, 0xFFFFFFFF);
1034 }
1035 
1036 /*
1037   push a relative object - stage2
1038   this is called during buffers processing
1039 */
1040 _PUBLIC_ enum ndr_err_code ndr_push_relative_ptr2(struct ndr_push *ndr, const void *p)
     /* [<][>][^][v][top][bottom][index][help] */
1041 {
1042         uint32_t save_offset;
1043         uint32_t ptr_offset = 0xFFFFFFFF;
1044         if (p == NULL) {
1045                 return NDR_ERR_SUCCESS;
1046         }
1047         save_offset = ndr->offset;
1048         NDR_CHECK(ndr_token_retrieve(&ndr->relative_list, p, &ptr_offset));
1049         if (ptr_offset > ndr->offset) {
1050                 return ndr_push_error(ndr, NDR_ERR_BUFSIZE, 
1051                                       "ndr_push_relative_ptr2 ptr_offset(%u) > ndr->offset(%u)",
1052                                       ptr_offset, ndr->offset);
1053         }
1054         ndr->offset = ptr_offset;
1055         if (save_offset < ndr->relative_base_offset) {
1056                 return ndr_push_error(ndr, NDR_ERR_BUFSIZE, 
1057                                       "ndr_push_relative_ptr2 save_offset(%u) < ndr->relative_base_offset(%u)",
1058                                       save_offset, ndr->relative_base_offset);
1059         }       
1060         NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, save_offset - ndr->relative_base_offset));
1061         ndr->offset = save_offset;
1062         return NDR_ERR_SUCCESS;
1063 }
1064 
1065 /*
1066   get the current base for relative pointers for the pull
1067 */
1068 _PUBLIC_ uint32_t ndr_pull_get_relative_base_offset(struct ndr_pull *ndr)
     /* [<][>][^][v][top][bottom][index][help] */
1069 {
1070         return ndr->relative_base_offset;
1071 }
1072 
1073 /*
1074   restore the old base for relative pointers for the pull
1075 */
1076 _PUBLIC_ void ndr_pull_restore_relative_base_offset(struct ndr_pull *ndr, uint32_t offset)
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1077 {
1078         ndr->relative_base_offset = offset;
1079 }
1080 
1081 /*
1082   setup the current base for relative pointers for the pull
1083   called in the NDR_SCALAR stage
1084 */
1085 _PUBLIC_ enum ndr_err_code ndr_pull_setup_relative_base_offset1(struct ndr_pull *ndr, const void *p, uint32_t offset)
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1086 {
1087         ndr->relative_base_offset = offset;
1088         return ndr_token_store(ndr, &ndr->relative_base_list, p, offset);
1089 }
1090 
1091 /*
1092   setup the current base for relative pointers for the pull
1093   called in the NDR_BUFFERS stage
1094 */
1095 _PUBLIC_ enum ndr_err_code ndr_pull_setup_relative_base_offset2(struct ndr_pull *ndr, const void *p)
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1096 {
1097         return ndr_token_retrieve(&ndr->relative_base_list, p, &ndr->relative_base_offset);
1098 }
1099 
1100 /*
1101   pull a relative object - stage1
1102   called during SCALARS processing
1103 */
1104 _PUBLIC_ enum ndr_err_code ndr_pull_relative_ptr1(struct ndr_pull *ndr, const void *p, uint32_t rel_offset)
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1105 {
1106         rel_offset += ndr->relative_base_offset;
1107         if (rel_offset > ndr->data_size) {
1108                 return ndr_pull_error(ndr, NDR_ERR_BUFSIZE, 
1109                                       "ndr_pull_relative_ptr1 rel_offset(%u) > ndr->data_size(%u)",
1110                                       rel_offset, ndr->data_size);
1111         }
1112         return ndr_token_store(ndr, &ndr->relative_list, p, rel_offset);
1113 }
1114 
1115 /*
1116   pull a relative object - stage2
1117   called during BUFFERS processing
1118 */
1119 _PUBLIC_ enum ndr_err_code ndr_pull_relative_ptr2(struct ndr_pull *ndr, const void *p)
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1120 {
1121         uint32_t rel_offset;
1122         NDR_CHECK(ndr_token_retrieve(&ndr->relative_list, p, &rel_offset));
1123         return ndr_pull_set_offset(ndr, rel_offset);
1124 }
1125 
1126 const static struct {
1127         enum ndr_err_code err;
1128         const char *string;
1129 } ndr_err_code_strings[] = {
1130         { NDR_ERR_SUCCESS, "Success" },
1131         { NDR_ERR_ARRAY_SIZE, "Bad Array Size" },
1132         { NDR_ERR_BAD_SWITCH, "Bad Switch" },
1133         { NDR_ERR_OFFSET, "Offset Error" },
1134         { NDR_ERR_RELATIVE, "Relative Pointer Error" },
1135         { NDR_ERR_CHARCNV, "Character Conversion Error" },
1136         { NDR_ERR_LENGTH, "Length Error" },
1137         { NDR_ERR_SUBCONTEXT, "Subcontext Error" },
1138         { NDR_ERR_COMPRESSION, "Compression Error" },
1139         { NDR_ERR_STRING, "String Error" },
1140         { NDR_ERR_VALIDATE, "Validate Error" },
1141         { NDR_ERR_BUFSIZE, "Buffer Size Error" },
1142         { NDR_ERR_ALLOC, "Allocation Error" },
1143         { NDR_ERR_RANGE, "Range Error" },
1144         { NDR_ERR_TOKEN, "Token Error" },
1145         { NDR_ERR_IPV4ADDRESS, "IPv4 Address Error" },
1146         { NDR_ERR_INVALID_POINTER, "Invalid Pointer" },
1147         { NDR_ERR_UNREAD_BYTES, "Unread Bytes" },
1148         { 0, NULL }
1149 };
1150 
1151 _PUBLIC_ const char *ndr_map_error2string(enum ndr_err_code ndr_err)
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1152 {
1153         int i;
1154         for (i = 0; ndr_err_code_strings[i].string != NULL; i++) {
1155                 if (ndr_err_code_strings[i].err == ndr_err)
1156                         return ndr_err_code_strings[i].string;
1157         }
1158         return "Unknown error";
1159 }

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