source/librpc/ndr/libndr.h

   1 /*
   2    Unix SMB/CIFS implementation.
   3    rpc interface definitions
   4    Copyright (C) Andrew Tridgell 2003
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 */
  20
  21 #ifndef __LIBNDR_H__
  22 #define __LIBNDR_H__
  23
  24 #define _PRINTF_ATTRIBUTE(a,b)
  25
  26 #include "librpc/ndr/misc.h"
  27 #include "librpc/ndr/security.h"
  28
  29 struct dcerpc_syntax_id {
  30         struct GUID uuid;
  31         uint32_t if_version;
  32 }/* [public] */;
  33
  34 /*
  35   this provides definitions for the libcli/rpc/ MSRPC library
  36 */
  37
  38
  39 /*
  40   this is used by the token store/retrieve code
  41 */
  42 struct ndr_token_list {
  43         struct ndr_token_list *next, *prev;
  44         const void *key;
  45         uint32_t value;
  46 };
  47
  48 /* this is the base structure passed to routines that
  49    parse MSRPC formatted data
  50
  51    note that in Samba4 we use separate routines and structures for
  52    MSRPC marshalling and unmarshalling. Also note that these routines
  53    are being kept deliberately very simple, and are not tied to a
  54    particular transport
  55 */
  56 struct ndr_pull {
  57         uint32_t flags; /* LIBNDR_FLAG_* */
  58         uint8_t *data;
  59         uint32_t data_size;
  60         uint32_t offset;
  61
  62         uint32_t relative_base_offset;
  63         struct ndr_token_list *relative_base_list;
  64
  65         struct ndr_token_list *relative_list;
  66         struct ndr_token_list *array_size_list;
  67         struct ndr_token_list *array_length_list;
  68         struct ndr_token_list *switch_list;
  69
  70         TALLOC_CTX *current_mem_ctx;
  71
  72         /* this is used to ensure we generate unique reference IDs
  73            between request and reply */
  74         uint32_t ptr_count;
  75 };
  76
  77 struct ndr_pull_save {
  78         uint32_t data_size;
  79         uint32_t offset;
  80         struct ndr_pull_save *next;
  81 };
  82
  83 /* structure passed to functions that generate NDR formatted data */
  84 struct ndr_push {
  85         uint32_t flags; /* LIBNDR_FLAG_* */
  86         uint8_t *data;
  87         uint32_t alloc_size;
  88         uint32_t offset;
  89
  90         uint32_t relative_base_offset;
  91         struct ndr_token_list *relative_base_list;
  92
  93         struct ndr_token_list *switch_list;
  94         struct ndr_token_list *relative_list;
  95         struct ndr_token_list *nbt_string_list;
  96
  97         /* this is used to ensure we generate unique reference IDs */
  98         uint32_t ptr_count;
  99 };
 100
 101 struct ndr_push_save {
 102         uint32_t offset;
 103         struct ndr_push_save *next;
 104 };
 105
 106
 107 /* structure passed to functions that print IDL structures */
 108 struct ndr_print {
 109         uint32_t flags; /* LIBNDR_FLAG_* */
 110         uint32_t depth;
 111         struct ndr_token_list *switch_list;
 112         void (*print)(struct ndr_print *, const char *, ...);
 113         void *private_data;
 114 };
 115
 116 #define LIBNDR_FLAG_BIGENDIAN  (1<<0)
 117 #define LIBNDR_FLAG_NOALIGN    (1<<1)
 118
 119 #define LIBNDR_FLAG_STR_ASCII           (1<<2)
 120 #define LIBNDR_FLAG_STR_LEN4            (1<<3)
 121 #define LIBNDR_FLAG_STR_SIZE4           (1<<4)
 122 #define LIBNDR_FLAG_STR_NOTERM          (1<<5)
 123 #define LIBNDR_FLAG_STR_NULLTERM        (1<<6)
 124 #define LIBNDR_FLAG_STR_SIZE2           (1<<7)
 125 #define LIBNDR_FLAG_STR_BYTESIZE        (1<<8)
 126 #define LIBNDR_FLAG_STR_FIXLEN32        (1<<9)
 127 #define LIBNDR_FLAG_STR_CONFORMANT      (1<<10)
 128 #define LIBNDR_FLAG_STR_CHARLEN         (1<<11)
 129 #define LIBNDR_FLAG_STR_UTF8            (1<<12)
 130 #define LIBNDR_FLAG_STR_FIXLEN15        (1<<13)
 131 #define LIBNDR_STRING_FLAGS             (0x7FFC)
 132
 133
 134 #define LIBNDR_FLAG_REF_ALLOC    (1<<20)
 135 #define LIBNDR_FLAG_REMAINING    (1<<21)
 136 #define LIBNDR_FLAG_ALIGN2       (1<<22)
 137 #define LIBNDR_FLAG_ALIGN4       (1<<23)
 138 #define LIBNDR_FLAG_ALIGN8       (1<<24)
 139
 140 #define LIBNDR_ALIGN_FLAGS (LIBNDR_FLAG_ALIGN2|LIBNDR_FLAG_ALIGN4|LIBNDR_FLAG_ALIGN8)
 141
 142 #define LIBNDR_PRINT_ARRAY_HEX   (1<<25)
 143 #define LIBNDR_PRINT_SET_VALUES  (1<<26)
 144
 145 /* used to force a section of IDL to be little-endian */
 146 #define LIBNDR_FLAG_LITTLE_ENDIAN (1<<27)
 147
 148 /* used to check if alignment padding is zero */
 149 #define LIBNDR_FLAG_PAD_CHECK     (1<<28)
 150
 151 /* set if an object uuid will be present */
 152 #define LIBNDR_FLAG_OBJECT_PRESENT    (1<<30)
 153
 154 /* set to avoid recursion in ndr_size_*() calculation */
 155 #define LIBNDR_FLAG_NO_NDR_SIZE         (1<<31)
 156
 157 /* useful macro for debugging */
 158 #define NDR_PRINT_DEBUG(type, p) ndr_print_debug((ndr_print_fn_t)ndr_print_ ##type, #p, p)
 159 #define NDR_PRINT_UNION_DEBUG(type, level, p) ndr_print_union_debug((ndr_print_fn_t)ndr_print_ ##type, #p, level, p)
 160 #define NDR_PRINT_FUNCTION_DEBUG(type, flags, p) ndr_print_function_debug((ndr_print_function_t)ndr_print_ ##type, #type, flags, p)
 161 #define NDR_PRINT_BOTH_DEBUG(type, p) NDR_PRINT_FUNCTION_DEBUG(type, NDR_BOTH, p)
 162 #define NDR_PRINT_OUT_DEBUG(type, p) NDR_PRINT_FUNCTION_DEBUG(type, NDR_OUT, p)
 163 #define NDR_PRINT_IN_DEBUG(type, p) NDR_PRINT_FUNCTION_DEBUG(type, NDR_IN | NDR_SET_VALUES, p)
 164
 165 #define NDR_BE(ndr) (((ndr)->flags & (LIBNDR_FLAG_BIGENDIAN|LIBNDR_FLAG_LITTLE_ENDIAN)) == LIBNDR_FLAG_BIGENDIAN)
 166
 167 enum ndr_err_code {
 168         NDR_ERR_ARRAY_SIZE,
 169         NDR_ERR_BAD_SWITCH,
 170         NDR_ERR_OFFSET,
 171         NDR_ERR_RELATIVE,
 172         NDR_ERR_CHARCNV,
 173         NDR_ERR_LENGTH,
 174         NDR_ERR_SUBCONTEXT,
 175         NDR_ERR_COMPRESSION,
 176         NDR_ERR_STRING,
 177         NDR_ERR_VALIDATE,
 178         NDR_ERR_BUFSIZE,
 179         NDR_ERR_ALLOC,
 180         NDR_ERR_RANGE,
 181         NDR_ERR_TOKEN,
 182         NDR_ERR_IPV4ADDRESS
 183 };
 184
 185 enum ndr_compression_alg {
 186         NDR_COMPRESSION_MSZIP   = 2,
 187         NDR_COMPRESSION_XPRESS  = 3
 188 };
 189
 190 /*
 191   flags passed to control parse flow
 192 */
 193 #define NDR_SCALARS 1
 194 #define NDR_BUFFERS 2
 195
 196 /*
 197   flags passed to ndr_print_*()
 198 */
 199 #define NDR_IN 1
 200 #define NDR_OUT 2
 201 #define NDR_BOTH 3
 202 #define NDR_SET_VALUES 4
 203
 204 #define NDR_PULL_NEED_BYTES(ndr, n) do { \
 205         if ((n) > ndr->data_size || ndr->offset + (n) > ndr->data_size) { \
 206                 return ndr_pull_error(ndr, NDR_ERR_BUFSIZE, "Pull bytes %u", (unsigned)n); \
 207         } \
 208 } while(0)
 209
 210 #define NDR_ALIGN(ndr, n) ndr_align_size(ndr->offset, n)
 211
 212 #define NDR_ROUND(size, n) (((size)+((n)-1)) & ~((n)-1))
 213
 214 #define NDR_PULL_ALIGN(ndr, n) do { \
 215         if (!(ndr->flags & LIBNDR_FLAG_NOALIGN)) { \
 216                 if (ndr->flags & LIBNDR_FLAG_PAD_CHECK) { \
 217                         ndr_check_padding(ndr, n); \
 218                 } \
 219                 ndr->offset = (ndr->offset + (n-1)) & ~(n-1); \
 220         } \
 221         if (ndr->offset > ndr->data_size) { \
 222                 return ndr_pull_error(ndr, NDR_ERR_BUFSIZE, "Pull align %u", (unsigned)n); \
 223         } \
 224 } while(0)
 225
 226 #define NDR_PUSH_NEED_BYTES(ndr, n) NDR_CHECK(ndr_push_expand(ndr, n))
 227
 228 #define NDR_PUSH_ALIGN(ndr, n) do { \
 229         if (!(ndr->flags & LIBNDR_FLAG_NOALIGN)) { \
 230                 uint32_t _pad = ((ndr->offset + (n-1)) & ~(n-1)) - ndr->offset; \
 231                 while (_pad--) NDR_CHECK(ndr_push_uint8(ndr, NDR_SCALARS, 0)); \
 232         } \
 233 } while(0)
 234
 235 /* these are used to make the error checking on each element in libndr
 236    less tedious, hopefully making the code more readable */
 237 #define NDR_CHECK(call) do { NTSTATUS _status; \
 238                              _status = call; \
 239                              if (!NT_STATUS_IS_OK(_status)) \
 240                                 return _status; \
 241                         } while (0)
 242
 243 #define NDR_PULL_GET_MEM_CTX(ndr) (ndr->current_mem_ctx)
 244
 245 #define NDR_PULL_SET_MEM_CTX(ndr, mem_ctx, flgs) do {\
 246         if ( !(flgs) || (ndr->flags & flgs) ) {\
 247                 if (!(mem_ctx)) {\
 248                         return ndr_pull_error(ndr, NDR_ERR_ALLOC, "NDR_PULL_SET_MEM_CTX(NULL): %s\n", __location__); \
 249                 }\
 250                 ndr->current_mem_ctx = CONST_DISCARD(TALLOC_CTX *, mem_ctx);\
 251         }\
 252 } while(0)
 253
 254 #define _NDR_PULL_FIX_CURRENT_MEM_CTX(ndr) do {\
 255         if (!ndr->current_mem_ctx) {\
 256                 ndr->current_mem_ctx = talloc_new(ndr);\
 257                 if (!ndr->current_mem_ctx) {\
 258                         return ndr_pull_error(ndr, NDR_ERR_ALLOC, "_NDR_PULL_FIX_CURRENT_MEM_CTX() failed: %s\n", __location__); \
 259                 }\
 260         }\
 261 } while(0)
 262
 263 #define NDR_PULL_ALLOC(ndr, s) do { \
 264         _NDR_PULL_FIX_CURRENT_MEM_CTX(ndr);\
 265         (s) = talloc_ptrtype(ndr->current_mem_ctx, (s)); \
 266         if (!(s)) return ndr_pull_error(ndr, NDR_ERR_ALLOC, "Alloc %s failed: %s\n", # s, __location__); \
 267 } while (0)
 268
 269 #define NDR_PULL_ALLOC_N(ndr, s, n) do { \
 270         _NDR_PULL_FIX_CURRENT_MEM_CTX(ndr);\
 271         (s) = talloc_array_ptrtype(ndr->current_mem_ctx, (s), n); \
 272         if (!(s)) return ndr_pull_error(ndr, NDR_ERR_ALLOC, "Alloc %u * %s failed: %s\n", (unsigned)n, # s, __location__); \
 273 } while (0)
 274
 275
 276 #define NDR_PUSH_ALLOC_SIZE(ndr, s, size) do { \
 277        (s) = talloc_array(ndr, uint8, size); \
 278        if (!(s)) return ndr_push_error(ndr, NDR_ERR_ALLOC, "push alloc %u failed: %s\n", (unsigned)size, __location__); \
 279 } while (0)
 280
 281 #define NDR_PUSH_ALLOC(ndr, s) do { \
 282        (s) = talloc_ptrtype(ndr, (s)); \
 283        if (!(s)) return ndr_push_error(ndr, NDR_ERR_ALLOC, "push alloc %s failed: %s\n", # s, __location__); \
 284 } while (0)
 285
 286 /* these are used when generic fn pointers are needed for ndr push/pull fns */
 287 typedef NTSTATUS (*ndr_push_flags_fn_t)(struct ndr_push *, int ndr_flags, const void *);
 288 typedef NTSTATUS (*ndr_pull_flags_fn_t)(struct ndr_pull *, int ndr_flags, void *);
 289 typedef void (*ndr_print_fn_t)(struct ndr_print *, const char *, const void *);
 290 typedef void (*ndr_print_function_t)(struct ndr_print *, const char *, int, const void *);
 291
 292 extern const struct dcerpc_syntax_id ndr_transfer_syntax;
 293 extern const struct dcerpc_syntax_id ndr64_transfer_syntax;
 294
 295 #include "dcerpc.h"
 296
 297 #endif /* __LIBNDR_H__ */