source3/include/smb_macros.h

   1 /*
   2    Unix SMB/CIFS implementation.
   3    SMB parameters and setup
   4    Copyright (C) Andrew Tridgell 1992-1999
   5    Copyright (C) John H Terpstra 1996-1999
   6    Copyright (C) Luke Kenneth Casson Leighton 1996-1999
   7    Copyright (C) Paul Ashton 1998 - 1999
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 #ifndef _SMB_MACROS_H
  24 #define _SMB_MACROS_H
  25
  26 /* Misc bit macros */
  27 #define BOOLSTR(b) ((b) ? "Yes" : "No")
  28 #define BITSETW(ptr,bit) ((SVAL(ptr,0) & (1<<(bit)))!=0)
  29
  30 /* these are useful macros for checking validity of handles */
  31 #define IS_IPC(conn)       ((conn) && (conn)->ipc)
  32 #define IS_PRINT(conn)       ((conn) && (conn)->printer)
  33
  34 #define CHECK_READ(fsp,req) \
  35         ((!(fsp)->fsp_flags.is_pathref) &&  \
  36          (fsp_get_io_fd(fsp) != -1) && \
  37          (((fsp)->fsp_flags.can_read) || \
  38           ((req->flags2 & FLAGS2_READ_PERMIT_EXECUTE) && \
  39            (fsp->access_mask & FILE_EXECUTE))))
  40
  41 /*
  42  * This is not documented in revision 49 of [MS-SMB2] but should be added in a
  43  * later revision (and torture test smb2.read.access as well as
  44  * smb2.ioctl_copy_chunk_bad_access against Server 2012R2 confirms this)
  45  *
  46  * If FILE_EXECUTE is granted to a handle then the SMB2 server acts as if
  47  * FILE_READ_DATA has also been granted. We must still keep the original granted
  48  * mask, because with ioctl requests, access checks are made on the file handle,
  49  * "below" the SMB2 server, and the object store below the SMB layer is not
  50  * aware of this arrangement (see smb2.ioctl.copy_chunk_bad_access torture
  51  * test).
  52  */
  53 #define CHECK_READ_SMB2(fsp) \
  54         ((!(fsp)->fsp_flags.is_pathref) &&  \
  55          (fsp_get_io_fd(fsp) != -1) && \
  56          (((fsp)->fsp_flags.can_read) || \
  57           (fsp->access_mask & FILE_EXECUTE)))
  58
  59 /* An IOCTL readability check (validating read access
  60  * when the IOCTL code requires it)
  61  * http://social.technet.microsoft.com/wiki/contents/articles/24653.decoding-io-control-codes-ioctl-fsctl-and-deviceiocodes-with-table-of-known-values.aspx
  62  * ). On Windows servers, this is done by the IO manager, which is unaware of
  63  * the "if execute is granted then also grant read" arrangement.
  64  */
  65 #define CHECK_READ_IOCTL(fsp) \
  66         ((!(fsp)->fsp_flags.is_pathref) &&  \
  67          (fsp_get_io_fd(fsp) != -1) && \
  68          (((fsp)->fsp_flags.can_read)))
  69
  70 #define ERROR_WAS_LOCK_DENIED(status) (NT_STATUS_EQUAL((status), NT_STATUS_LOCK_NOT_GRANTED) || \
  71                                 NT_STATUS_EQUAL((status), NT_STATUS_FILE_LOCK_CONFLICT) )
  72
  73 /* the service number for the [globals] defaults */
  74 #define GLOBAL_SECTION_SNUM     (-1)
  75 /* translates a connection number into a service number */
  76 #define SNUM(conn)              ((conn)?(conn)->params->service:GLOBAL_SECTION_SNUM)
  77
  78
  79 /* access various service details */
  80 #define CAN_WRITE(conn)    (!conn->read_only)
  81 #define VALID_SNUM(snum)   (lp_snum_ok(snum))
  82 #define GUEST_OK(snum)     (VALID_SNUM(snum) && lp_guest_ok(snum))
  83 #define GUEST_ONLY(snum)   (VALID_SNUM(snum) && lp_guest_only(snum))
  84 #define CAN_PRINT(conn)    ((conn) && lp_printable(SNUM(conn)))
  85 #define MAP_HIDDEN(conn)   ((conn) && lp_map_hidden(SNUM(conn)))
  86 #define MAP_SYSTEM(conn)   ((conn) && lp_map_system(SNUM(conn)))
  87 #define MAP_ARCHIVE(conn)   ((conn) && lp_map_archive(SNUM(conn)))
  88 #define IS_HIDDEN_PATH(conn,path)  ((conn) && is_in_path((path),(conn)->hide_list,(conn)->case_sensitive))
  89 #define IS_VETO_PATH(conn,path)  ((conn) && is_in_path((path),(conn)->veto_list,(conn)->case_sensitive))
  90 #define IS_VETO_OPLOCK_PATH(conn,path)  ((conn) && is_in_path((path),(conn)->veto_oplock_list,(conn)->case_sensitive))
  91
  92 /*
  93  * Used by the stat cache code to check if a returned
  94  * stat structure is valid.
  95  */
  96
  97 #define VALID_STAT(st) ((st).st_ex_nlink != 0)
  98 #define VALID_STAT_OF_DIR(st) (VALID_STAT(st) && S_ISDIR((st).st_ex_mode))
  99 #define SET_STAT_INVALID(st) { \
 100                 (st).st_ex_nlink = 0;                                   \
 101                 (st).cached_dos_attributes = FILE_ATTRIBUTE_INVALID;    \
 102 };
 103
 104 /* Macros to get at offsets within smb_lkrng and smb_unlkrng
 105    structures. We cannot define these as actual structures
 106    due to possible differences in structure packing
 107    on different machines/compilers. */
 108
 109 #define SMB_LPID_OFFSET(indx) (10 * (indx))
 110 #define SMB_LKOFF_OFFSET(indx) ( 2 + (10 * (indx)))
 111 #define SMB_LKLEN_OFFSET(indx) ( 6 + (10 * (indx)))
 112 #define SMB_LARGE_LPID_OFFSET(indx) (20 * (indx))
 113 #define SMB_LARGE_LKOFF_OFFSET_HIGH(indx) (4 + (20 * (indx)))
 114 #define SMB_LARGE_LKOFF_OFFSET_LOW(indx) (8 + (20 * (indx)))
 115 #define SMB_LARGE_LKLEN_OFFSET_HIGH(indx) (12 + (20 * (indx)))
 116 #define SMB_LARGE_LKLEN_OFFSET_LOW(indx) (16 + (20 * (indx)))
 117
 118 #define ERROR_NT(status) error_packet(outbuf,0,0,status,__LINE__,__FILE__)
 119 #define ERROR_BOTH(status,class,code) error_packet(outbuf,class,code,status,__LINE__,__FILE__)
 120
 121 #define reply_nterror(req,status) reply_nt_error(req,status,__LINE__,__FILE__)
 122 #define reply_force_doserror(req,eclass,ecode) reply_force_dos_error(req,eclass,ecode,__LINE__,__FILE__)
 123 #define reply_botherror(req,status,eclass,ecode) reply_both_error(req,eclass,ecode,status,__LINE__,__FILE__)
 124
 125 #if 0
 126 /* defined in IDL */
 127 /* these are the datagram types */
 128 #define DGRAM_DIRECT_UNIQUE 0x10
 129 #endif
 130
 131 #define SMB_ROUNDUP(x,r) ( ((x)%(r)) ? ( (((x)+(r))/(r))*(r) ) : (x))
 132
 133 /* Extra macros added by Ying Chen at IBM - speed increase by inlining. */
 134 #define smb_buf(buf) (((char *)(buf)) + smb_size + CVAL(buf,smb_wct)*2)
 135 #define smb_buf_const(buf) (((const char *)(buf)) + smb_size + CVAL(buf,smb_wct)*2)
 136 #define smb_buflen(buf) (SVAL(buf,smb_vwv0 + (int)CVAL(buf, smb_wct)*2))
 137
 138 /* the remaining number of bytes in smb buffer 'buf' from pointer 'p'. */
 139 #define smbreq_bufrem(req, p) ((req)->buflen < PTR_DIFF((p), (req)->buf) ? 0 : (req)->buflen - PTR_DIFF((p), (req)->buf))
 140
 141
 142 /* Note that chain_size must be available as an extern int to this macro. */
 143 #define smb_offset(p,buf) (PTR_DIFF(p,buf+4))
 144
 145 #define smb_len(buf) smb_len_nbt(buf)
 146 #define _smb_setlen(buf, len) _smb_setlen_nbt(buf, len)
 147 #define smb_setlen(buf, len) smb_setlen_nbt(buf, len)
 148
 149 #define smb_len_large(buf) smb_len_tcp(buf)
 150 #define _smb_setlen_large(buf, len) _smb_setlen_tcp(buf, len)
 151
 152 #define ENCRYPTION_REQUIRED(conn) ((conn) ? ((conn)->encrypt_level == SMB_SIGNING_REQUIRED) : false)
 153 #define IS_CONN_ENCRYPTED(conn) ((conn) ? (conn)->encrypted_tid : false)
 154
 155 /****************************************************************************
 156  Return True if the offset is at zero.
 157 ****************************************************************************/
 158
 159 #define dptr_zero(buf) (IVAL(buf,1) == 0)
 160
 161 /*******************************************************************
 162 copy an IP address from one buffer to another
 163 ********************************************************************/
 164
 165 #define putip(dest,src) memcpy(dest,src,4)
 166
 167 /*******************************************************************
 168  Return True if a server has CIFS UNIX capabilities.
 169 ********************************************************************/
 170
 171 #define SERVER_HAS_UNIX_CIFS(c) (smb1cli_conn_capabilities(c->conn) & CAP_UNIX)
 172
 173 /****************************************************************************
 174  Make a filename into unix format.
 175 ****************************************************************************/
 176
 177 #define IS_DIRECTORY_SEP(c) ((c) == '\\' || (c) == '/')
 178 #define unix_format(fname) string_replace(fname,'\\','/')
 179
 180 /****************************************************************************
 181  Make a file into DOS format.
 182 ****************************************************************************/
 183
 184 #define dos_format(fname) string_replace(fname,'/','\\')
 185
 186 /*****************************************************************************
 187  Check to see if we are a DC for this domain
 188 *****************************************************************************/
 189
 190 #define IS_DC  (lp_server_role()==ROLE_DOMAIN_PDC || lp_server_role()==ROLE_DOMAIN_BDC || lp_server_role() == ROLE_ACTIVE_DIRECTORY_DC || lp_server_role() == ROLE_IPA_DC)
 191 #define IS_AD_DC  (lp_server_role() == ROLE_ACTIVE_DIRECTORY_DC)
 192
 193 /*
 194  * If you add any entries to KERBEROS_VERIFY defines, please modify the below expressions
 195  * so they remain accurate.
 196  */
 197 #define USE_KERBEROS_KEYTAB (KERBEROS_VERIFY_SECRETS != lp_kerberos_method())
 198 #define USE_SYSTEM_KEYTAB \
 199     ((KERBEROS_VERIFY_SECRETS_AND_KEYTAB == lp_kerberos_method()) || \
 200      (KERBEROS_VERIFY_SYSTEM_KEYTAB == lp_kerberos_method()))
 201
 202 /*****************************************************************************
 203  Safe allocation macros.
 204 *****************************************************************************/
 205
 206 #define SMB_MALLOC_ARRAY(type,count) (type *)malloc_array(sizeof(type),(count))
 207 #define SMB_MEMALIGN_ARRAY(type,align,count) (type *)memalign_array(sizeof(type),align,(count))
 208 #define SMB_REALLOC(p,s) Realloc((p),(s),True)  /* Always frees p on error or s == 0 */
 209 #define SMB_REALLOC_ARRAY(p,type,count) (type *)realloc_array((p),sizeof(type),(count),True) /* Always frees p on error or s == 0 */
 210 #define SMB_CALLOC_ARRAY(type,count) (type *)calloc_array(sizeof(type),(count))
 211 #define SMB_XMALLOC_P(type) (type *)smb_xmalloc_array(sizeof(type),1)
 212 #define SMB_XMALLOC_ARRAY(type,count) (type *)smb_xmalloc_array(sizeof(type),(count))
 213
 214 #define TALLOC(ctx, size) talloc_named_const(ctx, size, __location__)
 215 #define TALLOC_SIZE(ctx, size) talloc_named_const(ctx, size, __location__)
 216 #define TALLOC_REALLOC(ctx, ptr, count) _talloc_realloc(ctx, ptr, count, __location__)
 217 #define talloc_destroy(ctx) talloc_free(ctx)
 218 #ifndef TALLOC_FREE
 219 #define TALLOC_FREE(ctx) do { talloc_free(ctx); ctx=NULL; } while(0)
 220 #endif
 221
 222 /* only define PARANOID_MALLOC_CHECKER with --enable-developer */
 223
 224 #if defined(DEVELOPER)
 225 #  define PARANOID_MALLOC_CHECKER 1
 226 #endif
 227
 228 #if defined(PARANOID_MALLOC_CHECKER)
 229
 230 /* Get medieval on our ass about malloc.... */
 231
 232 /* Restrictions on malloc/realloc/calloc. */
 233 #ifdef malloc
 234 #undef malloc
 235 #endif
 236 #define malloc(s) __ERROR_DONT_USE_MALLOC_DIRECTLY
 237
 238 #ifdef realloc
 239 #undef realloc
 240 #endif
 241 #define realloc(p,s) __ERROR_DONT_USE_REALLOC_DIRECTLY
 242
 243 #ifdef calloc
 244 #undef calloc
 245 #endif
 246 #define calloc(n,s) __ERROR_DONT_USE_CALLOC_DIRECTLY
 247
 248 #ifdef strndup
 249 #undef strndup
 250 #endif
 251 #define strndup(s,n) __ERROR_DONT_USE_STRNDUP_DIRECTLY
 252
 253 #ifdef strdup
 254 #undef strdup
 255 #endif
 256 #define strdup(s) __ERROR_DONT_USE_STRDUP_DIRECTLY
 257
 258 #define SMB_MALLOC(s) malloc_(s)
 259 #define SMB_MALLOC_P(type) (type *)malloc_(sizeof(type))
 260
 261 #define SMB_STRDUP(s) smb_xstrdup(s)
 262 #define SMB_STRNDUP(s,n) smb_xstrndup(s,n)
 263
 264 #else
 265
 266 /* Regular malloc code. */
 267
 268 #define SMB_MALLOC(s) malloc(s)
 269 #define SMB_MALLOC_P(type) (type *)malloc(sizeof(type))
 270
 271 #define SMB_STRDUP(s) strdup(s)
 272 #define SMB_STRNDUP(s,n) strndup(s,n)
 273
 274 #endif
 275
 276 #define ADD_TO_ARRAY(mem_ctx, type, elem, array, num) \
 277 do { \
 278         *(array) = ((mem_ctx) != NULL) ? \
 279                 talloc_realloc(mem_ctx, (*(array)), type, (*(num))+1) : \
 280                 SMB_REALLOC_ARRAY((*(array)), type, (*(num))+1); \
 281         SMB_ASSERT((*(array)) != NULL); \
 282         (*(array))[*(num)] = (elem); \
 283         (*(num)) += 1; \
 284 } while (0)
 285
 286 #define ADD_TO_LARGE_ARRAY(mem_ctx, type, elem, array, num, size) \
 287         add_to_large_array((mem_ctx), sizeof(type), &(elem), (void *)(array), (num), (size));
 288
 289 #endif /* _SMB_MACROS_H */