source/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 2 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, write to the Free Software
  21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22 */
  23
  24 #ifndef _SMB_MACROS_H
  25 #define _SMB_MACROS_H
  26
  27 /* Misc bit macros */
  28 #define BOOLSTR(b) ((b) ? "Yes" : "No")
  29 #define BITSETB(ptr,bit) ((((char *)ptr)[0] & (1<<(bit)))!=0)
  30 #define BITSETW(ptr,bit) ((SVAL(ptr,0) & (1<<(bit)))!=0)
  31
  32 /* for readability... */
  33 #define IS_DOS_READONLY(test_mode) (((test_mode) & aRONLY) != 0)
  34 #define IS_DOS_DIR(test_mode)      (((test_mode) & aDIR) != 0)
  35 #define IS_DOS_ARCHIVE(test_mode)  (((test_mode) & aARCH) != 0)
  36 #define IS_DOS_SYSTEM(test_mode)   (((test_mode) & aSYSTEM) != 0)
  37 #define IS_DOS_HIDDEN(test_mode)   (((test_mode) & aHIDDEN) != 0)
  38
  39 #ifndef SAFE_FREE /* Oh no this is also defined in tdb.h */
  40
  41 /**
  42  * Free memory if the pointer and zero the pointer.
  43  *
  44  * @note You are explicitly allowed to pass NULL pointers -- they will
  45  * always be ignored.
  46  **/
  47 #define SAFE_FREE(x) do { if ((x) != NULL) {free(x); x=NULL;} } while(0)
  48 #endif
  49
  50 /* zero a structure */
  51 #define ZERO_STRUCT(x) memset((char *)&(x), 0, sizeof(x))
  52
  53 /* zero a structure given a pointer to the structure */
  54 #define ZERO_STRUCTP(x) do { if ((x) != NULL) memset((char *)(x), 0, sizeof(*(x))); } while(0)
  55
  56 /* zero a structure given a pointer to the structure - no zero check */
  57 #define ZERO_STRUCTPN(x) memset((char *)(x), 0, sizeof(*(x)))
  58
  59 /* zero an array - note that sizeof(array) must work - ie. it must not be a
  60    pointer */
  61 #define ZERO_ARRAY(x) memset((char *)(x), 0, sizeof(x))
  62
  63 /* pointer difference macro */
  64 #define PTR_DIFF(p1,p2) ((ptrdiff_t)(((const char *)(p1)) - (const char *)(p2)))
  65
  66 /* work out how many elements there are in a static array */
  67 #define ARRAY_SIZE(a) (sizeof(a)/sizeof(a[0]))
  68
  69 /* assert macros */
  70 #define SMB_ASSERT(b) ((b)?(void)0: \
  71         (DEBUG(0,("PANIC: assert failed at %s(%d)\n", \
  72                  __FILE__, __LINE__)), smb_panic("assert failed")))
  73 #define SMB_ASSERT_ARRAY(a,n) SMB_ASSERT((sizeof(a)/sizeof((a)[0])) >= (n))
  74
  75 /* these are useful macros for checking validity of handles */
  76 #define OPEN_FSP(fsp)    ((fsp) && !(fsp)->is_directory)
  77 #define OPEN_CONN(conn)    ((conn) && (conn)->open)
  78 #define IS_IPC(conn)       ((conn) && (conn)->ipc)
  79 #define IS_PRINT(conn)       ((conn) && (conn)->printer)
  80 #define FNUM_OK(fsp,c) (OPEN_FSP(fsp) && (c)==(fsp)->conn)
  81
  82 #define CHECK_FSP(fsp,conn) if (!FNUM_OK(fsp,conn)) \
  83                                return(ERROR_DOS(ERRDOS,ERRbadfid)); \
  84                             else if((fsp)->fd == -1) \
  85                                return(ERROR_DOS(ERRDOS,ERRbadaccess))
  86
  87 #define CHECK_READ(fsp) if (!(fsp)->can_read) \
  88                                return(ERROR_DOS(ERRDOS,ERRbadaccess))
  89 #define CHECK_WRITE(fsp) if (!(fsp)->can_write) \
  90                                return(ERROR_DOS(ERRDOS,ERRbadaccess))
  91
  92 #define CHECK_ERROR(fsp) if (HAS_CACHED_ERROR(fsp)) \
  93                                                                 return(CACHED_ERROR(fsp))
  94
  95 /* translates a connection number into a service number */
  96 #define SNUM(conn)         ((conn)?(conn)->service:-1)
  97
  98 /* access various service details */
  99 #define SERVICE(snum)      (lp_servicename(snum))
 100 #define PRINTCAP           (lp_printcapname())
 101 #define PRINTCOMMAND(snum) (lp_printcommand(snum))
 102 #define PRINTERNAME(snum)  (lp_printername(snum))
 103 #define CAN_WRITE(conn)    (!conn->read_only)
 104 #define VALID_SNUM(snum)   (lp_snum_ok(snum))
 105 #define GUEST_OK(snum)     (VALID_SNUM(snum) && lp_guest_ok(snum))
 106 #define GUEST_ONLY(snum)   (VALID_SNUM(snum) && lp_guest_only(snum))
 107 #define CAN_SETDIR(snum)   (!lp_no_set_dir(snum))
 108 #define CAN_PRINT(conn)    ((conn) && lp_print_ok((conn)->service))
 109 #define MAP_HIDDEN(conn)   ((conn) && lp_map_hidden((conn)->service))
 110 #define MAP_SYSTEM(conn)   ((conn) && lp_map_system((conn)->service))
 111 #define MAP_ARCHIVE(conn)   ((conn) && lp_map_archive((conn)->service))
 112 #define IS_HIDDEN_PATH(conn,path)  ((conn) && is_in_path((path),(conn)->hide_list))
 113 #define IS_VETO_PATH(conn,path)  ((conn) && is_in_path((path),(conn)->veto_list))
 114 #define IS_VETO_OPLOCK_PATH(conn,path)  ((conn) && is_in_path((path),(conn)->veto_oplock_list))
 115
 116 /*
 117  * Used by the stat cache code to check if a returned
 118  * stat structure is valid.
 119  */
 120
 121 #define VALID_STAT(st) ((st).st_nlink != 0)
 122 #define VALID_STAT_OF_DIR(st) (VALID_STAT(st) && S_ISDIR((st).st_mode))
 123
 124 #ifndef MIN
 125 #define MIN(a,b) ((a)<(b)?(a):(b))
 126 #endif
 127 #ifndef MAX
 128 #define MAX(a,b) ((a)>(b)?(a):(b))
 129 #endif
 130
 131 #ifndef ABS
 132 #define ABS(a) ((a)>0?(a):(-(a)))
 133 #endif
 134
 135 /* Macros to get at offsets within smb_lkrng and smb_unlkrng
 136    structures. We cannot define these as actual structures
 137    due to possible differences in structure packing
 138    on different machines/compilers. */
 139
 140 #define SMB_LPID_OFFSET(indx) (10 * (indx))
 141 #define SMB_LKOFF_OFFSET(indx) ( 2 + (10 * (indx)))
 142 #define SMB_LKLEN_OFFSET(indx) ( 6 + (10 * (indx)))
 143 #define SMB_LARGE_LPID_OFFSET(indx) (20 * (indx))
 144 #define SMB_LARGE_LKOFF_OFFSET_HIGH(indx) (4 + (20 * (indx)))
 145 #define SMB_LARGE_LKOFF_OFFSET_LOW(indx) (8 + (20 * (indx)))
 146 #define SMB_LARGE_LKLEN_OFFSET_HIGH(indx) (12 + (20 * (indx)))
 147 #define SMB_LARGE_LKLEN_OFFSET_LOW(indx) (16 + (20 * (indx)))
 148
 149 /* Macro to cache an error in a write_bmpx_struct */
 150 #define CACHE_ERROR(w,c,e) ((w)->wr_errclass = (c), (w)->wr_error = (e), \
 151                 w->wr_discard = True, -1)
 152 /* Macro to test if an error has been cached for this fnum */
 153 #define HAS_CACHED_ERROR(fsp) ((fsp)->wbmpx_ptr && \
 154                 (fsp)->wbmpx_ptr->wr_discard)
 155 /* Macro to turn the cached error into an error packet */
 156 #define CACHED_ERROR(fsp) cached_error_packet(outbuf,fsp,__LINE__,__FILE__)
 157
 158 /* these are the datagram types */
 159 #define DGRAM_DIRECT_UNIQUE 0x10
 160
 161 #define ERROR_DOS(class,code) error_packet(outbuf,NT_STATUS_OK,class,code,__LINE__,__FILE__)
 162 #define ERROR_NT(status) error_packet(outbuf,status,0,0,__LINE__,__FILE__)
 163 #define ERROR_BOTH(status,class,code) error_packet(outbuf,status,class,code,__LINE__,__FILE__)
 164
 165 /* this is how errors are generated */
 166 #define UNIXERROR(defclass,deferror) unix_error_packet(outbuf,defclass,deferror,__LINE__,__FILE__)
 167
 168 #define SMB_ROUNDUP(x,g) (((x)+((g)-1))&~((g)-1))
 169 #define SMB_ROUNDUP_ALLOCATION(s) ((s) ? (SMB_ROUNDUP((SMB_OFF_T)((s)+1), ((SMB_OFF_T)SMB_ROUNDUP_ALLOCATION_SIZE))) : 0 )
 170
 171 /* Extra macros added by Ying Chen at IBM - speed increase by inlining. */
 172 #define smb_buf(buf) (((char *)(buf)) + smb_size + CVAL(buf,smb_wct)*2)
 173 #define smb_buflen(buf) (SVAL(buf,smb_vwv0 + (int)CVAL(buf, smb_wct)*2))
 174
 175 /* the remaining number of bytes in smb buffer 'buf' from pointer 'p'. */
 176 #define smb_bufrem(buf, p) (smb_buflen(buf)-PTR_DIFF(p, smb_buf(buf)))
 177
 178 /* Note that chain_size must be available as an extern int to this macro. */
 179 #define smb_offset(p,buf) (PTR_DIFF(p,buf+4) + chain_size)
 180
 181 #define smb_len(buf) (PVAL(buf,3)|(PVAL(buf,2)<<8)|((PVAL(buf,1)&1)<<16))
 182 #define _smb_setlen(buf,len) buf[0] = 0; buf[1] = (len&0x10000)>>16; \
 183         buf[2] = (len&0xFF00)>>8; buf[3] = len&0xFF;
 184
 185 /*******************************************************************
 186 find the difference in milliseconds between two struct timeval
 187 values
 188 ********************************************************************/
 189
 190 #define TvalDiff(tvalold,tvalnew) \
 191   (((tvalnew)->tv_sec - (tvalold)->tv_sec)*1000 +  \
 192          ((int)(tvalnew)->tv_usec - (int)(tvalold)->tv_usec)/1000)
 193
 194 /****************************************************************************
 195 true if two IP addresses are equal
 196 ****************************************************************************/
 197
 198 #define ip_equal(ip1,ip2) ((ip1).s_addr == (ip2).s_addr)
 199
 200 /*****************************************************************
 201  splits out the last subkey of a key
 202  *****************************************************************/
 203
 204 #define reg_get_subkey(full_keyname, key_name, subkey_name) \
 205         split_at_last_component(full_keyname, key_name, '\\', subkey_name)
 206
 207 /****************************************************************************
 208  Used by dptr_zero.
 209 ****************************************************************************/
 210
 211 #define DPTR_MASK ((uint32)(((uint32)1)<<31))
 212
 213 /****************************************************************************
 214  Return True if the offset is at zero.
 215 ****************************************************************************/
 216
 217 #define dptr_zero(buf) ((IVAL(buf,1)&~DPTR_MASK) == 0)
 218
 219 /*******************************************************************
 220 copy an IP address from one buffer to another
 221 ********************************************************************/
 222
 223 #define putip(dest,src) memcpy(dest,src,4)
 224
 225 /*******************************************************************
 226  Return True if a server has CIFS UNIX capabilities.
 227 ********************************************************************/
 228
 229 #define SERVER_HAS_UNIX_CIFS(c) ((c)->capabilities & CAP_UNIX)
 230
 231 /****************************************************************************
 232  Make a filename into unix format.
 233 ****************************************************************************/
 234
 235 #define unix_format(fname) string_replace(fname,'\\','/')
 236 #define unix_format_w(fname) string_replace_w(fname, UCS2_CHAR('\\'), UCS2_CHAR('/'))
 237
 238 /****************************************************************************
 239  Make a file into DOS format.
 240 ****************************************************************************/
 241
 242 #define dos_format(fname) string_replace(fname,'/','\\')
 243
 244 /*******************************************************************
 245  vfs stat wrapper that calls internal2unix.
 246 ********************************************************************/
 247
 248 #define vfs_stat(conn, fname, st) ((conn)->vfs_ops.stat((conn), fname,(st)))
 249
 250 /*******************************************************************
 251  vfs lstat wrapper that calls internal2unix.
 252 ********************************************************************/
 253
 254 #define vfs_lstat(conn, fname, st) ((conn)->vfs_ops.lstat((conn), fname,(st)))
 255
 256 /*******************************************************************
 257  vfs fstat wrapper
 258 ********************************************************************/
 259
 260 #define vfs_fstat(fsp, fd, st) ((fsp)->conn->vfs_ops.fstat((fsp),(fd),(st)))
 261
 262 /*******************************************************************
 263  vfs rmdir wrapper that calls internal2unix.
 264 ********************************************************************/
 265
 266 #define vfs_rmdir(conn,fname) ((conn)->vfs_ops.rmdir((conn),fname))
 267
 268 /*******************************************************************
 269  vfs Unlink wrapper that calls internal2unix.
 270 ********************************************************************/
 271
 272 #define vfs_unlink(conn, fname) ((conn)->vfs_ops.unlink((conn),fname))
 273
 274 /*******************************************************************
 275  vfs chmod wrapper that calls internal2unix.
 276 ********************************************************************/
 277
 278 #define vfs_chmod(conn,fname,mode) ((conn)->vfs_ops.chmod((conn),fname,(mode)))
 279
 280 /*******************************************************************
 281  vfs chown wrapper that calls internal2unix.
 282 ********************************************************************/
 283
 284 #define vfs_chown(conn,fname,uid,gid) ((conn)->vfs_ops.chown((conn),fname,(uid),(gid)))
 285
 286 /*******************************************************************
 287  A wrapper for vfs_chdir().
 288 ********************************************************************/
 289
 290 #define vfs_chdir(conn,fname) ((conn)->vfs_ops.chdir((conn),fname))
 291
 292 #endif /* _SMB_MACROS_H */