source/libcli/raw/rawreadwrite.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    client file read/write routines
   4    Copyright (C) Andrew Tridgell 1994-1998
   5    Copyright (C) James Myers 2003
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 */
  21
  22 #include "includes.h"
  23 #include "libcli/raw/libcliraw.h"
  24
  25 #define SETUP_REQUEST(cmd, wct, buflen) do { \
  26         req = smbcli_request_setup(tree, cmd, wct, buflen); \
  27         if (!req) return NULL; \
  28 } while (0)
  29
  30 /****************************************************************************
  31  low level read operation (async send)
  32 ****************************************************************************/
  33 struct smbcli_request *smb_raw_read_send(struct smbcli_tree *tree, union smb_read *parms)
  34 {
  35         BOOL bigoffset = False;
  36         struct smbcli_request *req = NULL;
  37
  38         switch (parms->generic.level) {
  39         case RAW_READ_READBRAW:
  40                 if (tree->session->transport->negotiate.capabilities & CAP_LARGE_FILES) {
  41                         bigoffset = True;
  42                 }
  43                 SETUP_REQUEST(SMBreadbraw, bigoffset? 10:8, 0);
  44                 SSVAL(req->out.vwv, VWV(0), parms->readbraw.in.file.fnum);
  45                 SIVAL(req->out.vwv, VWV(1), parms->readbraw.in.offset);
  46                 SSVAL(req->out.vwv, VWV(3), parms->readbraw.in.maxcnt);
  47                 SSVAL(req->out.vwv, VWV(4), parms->readbraw.in.mincnt);
  48                 SIVAL(req->out.vwv, VWV(5), parms->readbraw.in.timeout);
  49                 SSVAL(req->out.vwv, VWV(7), 0); /* reserved */
  50                 if (bigoffset) {
  51                         SIVAL(req->out.vwv, VWV(8),parms->readbraw.in.offset>>32);
  52                 }
  53                 break;
  54
  55         case RAW_READ_LOCKREAD:
  56                 SETUP_REQUEST(SMBlockread, 5, 0);
  57                 SSVAL(req->out.vwv, VWV(0), parms->lockread.in.file.fnum);
  58                 SSVAL(req->out.vwv, VWV(1), parms->lockread.in.count);
  59                 SIVAL(req->out.vwv, VWV(2), parms->lockread.in.offset);
  60                 SSVAL(req->out.vwv, VWV(4), parms->lockread.in.remaining);
  61                 break;
  62
  63         case RAW_READ_READ:
  64                 SETUP_REQUEST(SMBread, 5, 0);
  65                 SSVAL(req->out.vwv, VWV(0), parms->read.in.file.fnum);
  66                 SSVAL(req->out.vwv, VWV(1), parms->read.in.count);
  67                 SIVAL(req->out.vwv, VWV(2), parms->read.in.offset);
  68                 SSVAL(req->out.vwv, VWV(4), parms->read.in.remaining);
  69                 break;
  70
  71         case RAW_READ_READX:
  72                 if (tree->session->transport->negotiate.capabilities & CAP_LARGE_FILES) {
  73                         bigoffset = True;
  74                 }
  75                 SETUP_REQUEST(SMBreadX, bigoffset ? 12 : 10, 0);
  76                 SSVAL(req->out.vwv, VWV(0), SMB_CHAIN_NONE);
  77                 SSVAL(req->out.vwv, VWV(1), 0);
  78                 SSVAL(req->out.vwv, VWV(2), parms->readx.in.file.fnum);
  79                 SIVAL(req->out.vwv, VWV(3), parms->readx.in.offset);
  80                 SSVAL(req->out.vwv, VWV(5), parms->readx.in.maxcnt & 0xFFFF);
  81                 SSVAL(req->out.vwv, VWV(6), parms->readx.in.mincnt);
  82                 SIVAL(req->out.vwv, VWV(7), parms->readx.in.maxcnt >> 16);
  83                 SSVAL(req->out.vwv, VWV(9), parms->readx.in.remaining);
  84                 /*
  85                  * TODO: give an error when the offset is 64 bit
  86                  *       and the server doesn't support it
  87                  */
  88                 if (bigoffset) {
  89                         SIVAL(req->out.vwv, VWV(10),parms->readx.in.offset>>32);
  90                 }
  91                 if (parms->readx.in.read_for_execute) {
  92                         uint16_t flags2 = SVAL(req->out.hdr, HDR_FLG2);
  93                         flags2 |= FLAGS2_READ_PERMIT_EXECUTE;
  94                         SSVAL(req->out.hdr, HDR_FLG2, flags2);
  95                 }
  96                 break;
  97
  98         case RAW_READ_SMB2:
  99                 return NULL;
 100         }
 101
 102         if (!smbcli_request_send(req)) {
 103                 smbcli_request_destroy(req);
 104                 return NULL;
 105         }
 106
 107         /* the transport layer needs to know that a readbraw is pending
 108            and handle receives a little differently */
 109         if (parms->generic.level == RAW_READ_READBRAW) {
 110                 tree->session->transport->readbraw_pending = 1;
 111         }
 112
 113         return req;
 114 }
 115
 116 /****************************************************************************
 117  low level read operation (async recv)
 118 ****************************************************************************/
 119 NTSTATUS smb_raw_read_recv(struct smbcli_request *req, union smb_read *parms)
 120 {
 121         if (!smbcli_request_receive(req) ||
 122             smbcli_request_is_error(req)) {
 123                 goto failed;
 124         }
 125
 126         switch (parms->generic.level) {
 127         case RAW_READ_READBRAW:
 128                 parms->readbraw.out.nread = req->in.size - NBT_HDR_SIZE;
 129                 if (parms->readbraw.out.nread >
 130                     MAX(parms->readx.in.mincnt, parms->readx.in.maxcnt)) {
 131                         req->status = NT_STATUS_BUFFER_TOO_SMALL;
 132                         goto failed;
 133                 }
 134                 memcpy(parms->readbraw.out.data, req->in.buffer + NBT_HDR_SIZE, parms->readbraw.out.nread);
 135                 break;
 136
 137         case RAW_READ_LOCKREAD:
 138                 SMBCLI_CHECK_WCT(req, 5);
 139                 parms->lockread.out.nread = SVAL(req->in.vwv, VWV(0));
 140                 if (parms->lockread.out.nread > parms->lockread.in.count ||
 141                     !smbcli_raw_pull_data(req, req->in.data+3,
 142                                        parms->lockread.out.nread, parms->lockread.out.data)) {
 143                         req->status = NT_STATUS_BUFFER_TOO_SMALL;
 144                 }
 145                 break;
 146
 147         case RAW_READ_READ:
 148                 /* there are 4 reserved words in the reply */
 149                 SMBCLI_CHECK_WCT(req, 5);
 150                 parms->read.out.nread = SVAL(req->in.vwv, VWV(0));
 151                 if (parms->read.out.nread > parms->read.in.count ||
 152                     !smbcli_raw_pull_data(req, req->in.data+3,
 153                                        parms->read.out.nread, parms->read.out.data)) {
 154                         req->status = NT_STATUS_BUFFER_TOO_SMALL;
 155                 }
 156                 break;
 157
 158         case RAW_READ_READX:
 159                 /* there are 5 reserved words in the reply */
 160                 SMBCLI_CHECK_WCT(req, 12);
 161                 parms->readx.out.remaining       = SVAL(req->in.vwv, VWV(2));
 162                 parms->readx.out.compaction_mode = SVAL(req->in.vwv, VWV(3));
 163                 parms->readx.out.nread = SVAL(req->in.vwv, VWV(5));
 164                 if (parms->readx.out.nread > MAX(parms->readx.in.mincnt, parms->readx.in.maxcnt) ||
 165                     !smbcli_raw_pull_data(req, req->in.hdr + SVAL(req->in.vwv, VWV(6)),
 166                                        parms->readx.out.nread,
 167                                        parms->readx.out.data)) {
 168                         req->status = NT_STATUS_BUFFER_TOO_SMALL;
 169                 }
 170                 break;
 171
 172         case RAW_READ_SMB2:
 173                 req->status = NT_STATUS_INTERNAL_ERROR;
 174                 break;
 175         }
 176
 177 failed:
 178         return smbcli_request_destroy(req);
 179 }
 180
 181 /****************************************************************************
 182  low level read operation (sync interface)
 183 ****************************************************************************/
 184 NTSTATUS smb_raw_read(struct smbcli_tree *tree, union smb_read *parms)
 185 {
 186         struct smbcli_request *req = smb_raw_read_send(tree, parms);
 187         return smb_raw_read_recv(req, parms);
 188 }
 189
 190
 191 /****************************************************************************
 192  raw write interface (async send)
 193 ****************************************************************************/
 194 struct smbcli_request *smb_raw_write_send(struct smbcli_tree *tree, union smb_write *parms)
 195 {
 196         BOOL bigoffset = False;
 197         struct smbcli_request *req = NULL;
 198
 199         switch (parms->generic.level) {
 200         case RAW_WRITE_WRITEUNLOCK:
 201                 SETUP_REQUEST(SMBwriteunlock, 5, 3 + parms->writeunlock.in.count);
 202                 SSVAL(req->out.vwv, VWV(0), parms->writeunlock.in.file.fnum);
 203                 SSVAL(req->out.vwv, VWV(1), parms->writeunlock.in.count);
 204                 SIVAL(req->out.vwv, VWV(2), parms->writeunlock.in.offset);
 205                 SSVAL(req->out.vwv, VWV(4), parms->writeunlock.in.remaining);
 206                 SCVAL(req->out.data, 0, SMB_DATA_BLOCK);
 207                 SSVAL(req->out.data, 1, parms->writeunlock.in.count);
 208                 if (parms->writeunlock.in.count > 0) {
 209                         memcpy(req->out.data+3, parms->writeunlock.in.data,
 210                                parms->writeunlock.in.count);
 211                 }
 212                 break;
 213
 214         case RAW_WRITE_WRITE:
 215                 SETUP_REQUEST(SMBwrite, 5,  3 + parms->write.in.count);
 216                 SSVAL(req->out.vwv, VWV(0), parms->write.in.file.fnum);
 217                 SSVAL(req->out.vwv, VWV(1), parms->write.in.count);
 218                 SIVAL(req->out.vwv, VWV(2), parms->write.in.offset);
 219                 SSVAL(req->out.vwv, VWV(4), parms->write.in.remaining);
 220                 SCVAL(req->out.data, 0, SMB_DATA_BLOCK);
 221                 SSVAL(req->out.data, 1, parms->write.in.count);
 222                 if (parms->write.in.count > 0) {
 223                         memcpy(req->out.data+3, parms->write.in.data, parms->write.in.count);
 224                 }
 225                 break;
 226
 227         case RAW_WRITE_WRITECLOSE:
 228                 SETUP_REQUEST(SMBwriteclose, 6, 1 + parms->writeclose.in.count);
 229                 SSVAL(req->out.vwv, VWV(0), parms->writeclose.in.file.fnum);
 230                 SSVAL(req->out.vwv, VWV(1), parms->writeclose.in.count);
 231                 SIVAL(req->out.vwv, VWV(2), parms->writeclose.in.offset);
 232                 raw_push_dos_date3(tree->session->transport,
 233                                   req->out.vwv, VWV(4), parms->writeclose.in.mtime);
 234                 SCVAL(req->out.data, 0, 0);
 235                 if (parms->writeclose.in.count > 0) {
 236                         memcpy(req->out.data+1, parms->writeclose.in.data,
 237                                parms->writeclose.in.count);
 238                 }
 239                 break;
 240
 241         case RAW_WRITE_WRITEX:
 242                 if (tree->session->transport->negotiate.capabilities & CAP_LARGE_FILES) {
 243                         bigoffset = True;
 244                 }
 245                 SETUP_REQUEST(SMBwriteX, bigoffset ? 14 : 12, parms->writex.in.count);
 246                 SSVAL(req->out.vwv, VWV(0), SMB_CHAIN_NONE);
 247                 SSVAL(req->out.vwv, VWV(1), 0);
 248                 SSVAL(req->out.vwv, VWV(2), parms->writex.in.file.fnum);
 249                 SIVAL(req->out.vwv, VWV(3), parms->writex.in.offset);
 250                 SIVAL(req->out.vwv, VWV(5), 0); /* reserved */
 251                 SSVAL(req->out.vwv, VWV(7), parms->writex.in.wmode);
 252                 SSVAL(req->out.vwv, VWV(8), parms->writex.in.remaining);
 253                 SSVAL(req->out.vwv, VWV(9), parms->writex.in.count>>16);
 254                 SSVAL(req->out.vwv, VWV(10), parms->writex.in.count);
 255                 SSVAL(req->out.vwv, VWV(11), PTR_DIFF(req->out.data, req->out.hdr));
 256                 if (bigoffset) {
 257                         SIVAL(req->out.vwv,VWV(12),parms->writex.in.offset>>32);
 258                 }
 259                 if (parms->writex.in.count > 0) {
 260                         memcpy(req->out.data, parms->writex.in.data, parms->writex.in.count);
 261                 }
 262                 break;
 263
 264         case RAW_WRITE_SPLWRITE:
 265                 SETUP_REQUEST(SMBsplwr, 1, parms->splwrite.in.count);
 266                 SSVAL(req->out.vwv, VWV(0), parms->splwrite.in.file.fnum);
 267                 if (parms->splwrite.in.count > 0) {
 268                         memcpy(req->out.data, parms->splwrite.in.data, parms->splwrite.in.count);
 269                 }
 270                 break;
 271
 272         case RAW_WRITE_SMB2:
 273                 return NULL;
 274         }
 275
 276         if (!smbcli_request_send(req)) {
 277                 smbcli_request_destroy(req);
 278                 return NULL;
 279         }
 280
 281         return req;
 282 }
 283
 284
 285 /****************************************************************************
 286  raw write interface (async recv)
 287 ****************************************************************************/
 288 NTSTATUS smb_raw_write_recv(struct smbcli_request *req, union smb_write *parms)
 289 {
 290         if (!smbcli_request_receive(req) ||
 291             smbcli_request_is_error(req)) {
 292                 goto failed;
 293         }
 294
 295         switch (parms->generic.level) {
 296         case RAW_WRITE_WRITEUNLOCK:
 297                 SMBCLI_CHECK_WCT(req, 1);
 298                 parms->writeunlock.out.nwritten = SVAL(req->in.vwv, VWV(0));
 299                 break;
 300         case RAW_WRITE_WRITE:
 301                 SMBCLI_CHECK_WCT(req, 1);
 302                 parms->write.out.nwritten = SVAL(req->in.vwv, VWV(0));
 303                 break;
 304         case RAW_WRITE_WRITECLOSE:
 305                 SMBCLI_CHECK_WCT(req, 1);
 306                 parms->writeclose.out.nwritten = SVAL(req->in.vwv, VWV(0));
 307                 break;
 308         case RAW_WRITE_WRITEX:
 309                 SMBCLI_CHECK_WCT(req, 6);
 310                 parms->writex.out.nwritten  = SVAL(req->in.vwv, VWV(2));
 311                 parms->writex.out.nwritten += (CVAL(req->in.vwv, VWV(4)) << 16);
 312                 parms->writex.out.remaining = SVAL(req->in.vwv, VWV(3));
 313                 break;
 314         case RAW_WRITE_SPLWRITE:
 315                 break;
 316         case RAW_WRITE_SMB2:
 317                 req->status = NT_STATUS_INTERNAL_ERROR;
 318                 break;
 319         }
 320
 321 failed:
 322         return smbcli_request_destroy(req);
 323 }
 324
 325 /****************************************************************************
 326  raw write interface (sync interface)
 327 ****************************************************************************/
 328 NTSTATUS smb_raw_write(struct smbcli_tree *tree, union smb_write *parms)
 329 {
 330         struct smbcli_request *req = smb_raw_write_send(tree, parms);
 331         return smb_raw_write_recv(req, parms);
 332 }