source4/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
  24 #define SETUP_REQUEST(cmd, wct, buflen) do { \
  25         req = smbcli_request_setup(tree, cmd, wct, buflen); \
  26         if (!req) return NULL; \
  27 } while (0)
  28
  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_GENERIC:
  40                 return NULL;
  41
  42         case RAW_READ_READBRAW:
  43                 if (tree->session->transport->negotiate.capabilities & CAP_LARGE_FILES) {
  44                         bigoffset = True;
  45                 }
  46                 SETUP_REQUEST(SMBreadbraw, bigoffset? 10:8, 0);
  47                 SSVAL(req->out.vwv, VWV(0), parms->readbraw.in.fnum);
  48                 SIVAL(req->out.vwv, VWV(1), parms->readbraw.in.offset);
  49                 SSVAL(req->out.vwv, VWV(3), parms->readbraw.in.maxcnt);
  50                 SSVAL(req->out.vwv, VWV(4), parms->readbraw.in.mincnt);
  51                 SIVAL(req->out.vwv, VWV(5), parms->readbraw.in.timeout);
  52                 SSVAL(req->out.vwv, VWV(7), 0); /* reserved */
  53                 if (bigoffset) {
  54                         SIVAL(req->out.vwv, VWV(8),parms->readbraw.in.offset>>32);
  55                 }
  56                 break;
  57
  58         case RAW_READ_LOCKREAD:
  59                 SETUP_REQUEST(SMBlockread, 5, 0);
  60                 SSVAL(req->out.vwv, VWV(0), parms->lockread.in.fnum);
  61                 SSVAL(req->out.vwv, VWV(1), parms->lockread.in.count);
  62                 SIVAL(req->out.vwv, VWV(2), parms->lockread.in.offset);
  63                 SSVAL(req->out.vwv, VWV(4), parms->lockread.in.remaining);
  64                 break;
  65
  66         case RAW_READ_READ:
  67                 SETUP_REQUEST(SMBread, 5, 0);
  68                 SSVAL(req->out.vwv, VWV(0), parms->read.in.fnum);
  69                 SSVAL(req->out.vwv, VWV(1), parms->read.in.count);
  70                 SIVAL(req->out.vwv, VWV(2), parms->read.in.offset);
  71                 SSVAL(req->out.vwv, VWV(4), parms->read.in.remaining);
  72                 break;
  73
  74         case RAW_READ_READX:
  75                 if (tree->session->transport->negotiate.capabilities & CAP_LARGE_FILES) {
  76                         bigoffset = True;
  77                 }
  78                 SETUP_REQUEST(SMBreadX, bigoffset ? 12 : 10, 0);
  79                 SSVAL(req->out.vwv, VWV(0), 0xFF);
  80                 SSVAL(req->out.vwv, VWV(1), 0);
  81                 SSVAL(req->out.vwv, VWV(2), parms->readx.in.fnum);
  82                 SIVAL(req->out.vwv, VWV(3), parms->readx.in.offset);
  83                 SSVAL(req->out.vwv, VWV(5), parms->readx.in.maxcnt);
  84                 SSVAL(req->out.vwv, VWV(6), parms->readx.in.mincnt);
  85                 SIVAL(req->out.vwv, VWV(7), 0); /* reserved */
  86                 SSVAL(req->out.vwv, VWV(9), parms->readx.in.remaining);
  87                 if (bigoffset) {
  88                         SIVAL(req->out.vwv, VWV(10),parms->readx.in.offset>>32);
  89                 }
  90                 break;
  91         }
  92
  93         if (!smbcli_request_send(req)) {
  94                 smbcli_request_destroy(req);
  95                 return NULL;
  96         }
  97
  98         /* the transport layer needs to know that a readbraw is pending
  99            and handle receives a little differently */
 100         if (parms->generic.level == RAW_READ_READBRAW) {
 101                 tree->session->transport->readbraw_pending = 1;
 102         }
 103
 104         return req;
 105 }
 106
 107 /****************************************************************************
 108  low level read operation (async recv)
 109 ****************************************************************************/
 110 NTSTATUS smb_raw_read_recv(struct smbcli_request *req, union smb_read *parms)
 111 {
 112         if (!smbcli_request_receive(req) ||
 113             smbcli_request_is_error(req)) {
 114                 goto failed;
 115         }
 116
 117         switch (parms->generic.level) {
 118         case RAW_READ_GENERIC:
 119                 /* handled in _send() */
 120                 break;
 121
 122         case RAW_READ_READBRAW:
 123                 parms->readbraw.out.nread = req->in.size - NBT_HDR_SIZE;
 124                 if (parms->readbraw.out.nread >
 125                     MAX(parms->readx.in.mincnt, parms->readx.in.maxcnt)) {
 126                         req->status = NT_STATUS_BUFFER_TOO_SMALL;
 127                         goto failed;
 128                 }
 129                 memcpy(parms->readbraw.out.data, req->in.buffer + NBT_HDR_SIZE, parms->readbraw.out.nread);
 130                 break;
 131
 132         case RAW_READ_LOCKREAD:
 133                 SMBCLI_CHECK_WCT(req, 5);
 134                 parms->lockread.out.nread = SVAL(req->in.vwv, VWV(0));
 135                 if (parms->lockread.out.nread > parms->lockread.in.count ||
 136                     !smbcli_raw_pull_data(req, req->in.data+3,
 137                                        parms->lockread.out.nread, parms->lockread.out.data)) {
 138                         req->status = NT_STATUS_BUFFER_TOO_SMALL;
 139                 }
 140                 break;
 141
 142         case RAW_READ_READ:
 143                 /* there are 4 reserved words in the reply */
 144                 SMBCLI_CHECK_WCT(req, 5);
 145                 parms->read.out.nread = SVAL(req->in.vwv, VWV(0));
 146                 if (parms->read.out.nread > parms->read.in.count ||
 147                     !smbcli_raw_pull_data(req, req->in.data+3,
 148                                        parms->read.out.nread, parms->read.out.data)) {
 149                         req->status = NT_STATUS_BUFFER_TOO_SMALL;
 150                 }
 151                 break;
 152
 153         case RAW_READ_READX:
 154                 /* there are 5 reserved words in the reply */
 155                 SMBCLI_CHECK_WCT(req, 12);
 156                 parms->readx.out.remaining       = SVAL(req->in.vwv, VWV(2));
 157                 parms->readx.out.compaction_mode = SVAL(req->in.vwv, VWV(3));
 158                 parms->readx.out.nread = SVAL(req->in.vwv, VWV(5));
 159                 if (parms->readx.out.nread > MAX(parms->readx.in.mincnt, parms->readx.in.maxcnt) ||
 160                     !smbcli_raw_pull_data(req, req->in.hdr + SVAL(req->in.vwv, VWV(6)),
 161                                        parms->readx.out.nread,
 162                                        parms->readx.out.data)) {
 163                         req->status = NT_STATUS_BUFFER_TOO_SMALL;
 164                 }
 165                 break;
 166         }
 167
 168 failed:
 169         return smbcli_request_destroy(req);
 170 }
 171
 172 /****************************************************************************
 173  low level read operation (sync interface)
 174 ****************************************************************************/
 175 NTSTATUS smb_raw_read(struct smbcli_tree *tree, union smb_read *parms)
 176 {
 177         struct smbcli_request *req = smb_raw_read_send(tree, parms);
 178         return smb_raw_read_recv(req, parms);
 179 }
 180
 181
 182 /****************************************************************************
 183  raw write interface (async send)
 184 ****************************************************************************/
 185 struct smbcli_request *smb_raw_write_send(struct smbcli_tree *tree, union smb_write *parms)
 186 {
 187         BOOL bigoffset = False;
 188         struct smbcli_request *req = NULL;
 189
 190         switch (parms->generic.level) {
 191         case RAW_WRITE_GENERIC:
 192                 return NULL;
 193
 194         case RAW_WRITE_WRITEUNLOCK:
 195                 SETUP_REQUEST(SMBwriteunlock, 5, 3 + parms->writeunlock.in.count);
 196                 SSVAL(req->out.vwv, VWV(0), parms->writeunlock.in.fnum);
 197                 SSVAL(req->out.vwv, VWV(1), parms->writeunlock.in.count);
 198                 SIVAL(req->out.vwv, VWV(2), parms->writeunlock.in.offset);
 199                 SSVAL(req->out.vwv, VWV(4), parms->writeunlock.in.remaining);
 200                 SCVAL(req->out.data, 0, SMB_DATA_BLOCK);
 201                 SSVAL(req->out.data, 1, parms->writeunlock.in.count);
 202                 if (parms->writeunlock.in.count > 0) {
 203                         memcpy(req->out.data+3, parms->writeunlock.in.data,
 204                                parms->writeunlock.in.count);
 205                 }
 206                 break;
 207
 208         case RAW_WRITE_WRITE:
 209                 SETUP_REQUEST(SMBwrite, 5,  3 + parms->write.in.count);
 210                 SSVAL(req->out.vwv, VWV(0), parms->write.in.fnum);
 211                 SSVAL(req->out.vwv, VWV(1), parms->write.in.count);
 212                 SIVAL(req->out.vwv, VWV(2), parms->write.in.offset);
 213                 SSVAL(req->out.vwv, VWV(4), parms->write.in.remaining);
 214                 SCVAL(req->out.data, 0, SMB_DATA_BLOCK);
 215                 SSVAL(req->out.data, 1, parms->write.in.count);
 216                 if (parms->write.in.count > 0) {
 217                         memcpy(req->out.data+3, parms->write.in.data, parms->write.in.count);
 218                 }
 219                 break;
 220
 221         case RAW_WRITE_WRITECLOSE:
 222                 SETUP_REQUEST(SMBwriteclose, 6, 1 + parms->writeclose.in.count);
 223                 SSVAL(req->out.vwv, VWV(0), parms->writeclose.in.fnum);
 224                 SSVAL(req->out.vwv, VWV(1), parms->writeclose.in.count);
 225                 SIVAL(req->out.vwv, VWV(2), parms->writeclose.in.offset);
 226                 raw_push_dos_date3(tree->session->transport,
 227                                   req->out.vwv, VWV(4), parms->writeclose.in.mtime);
 228                 SCVAL(req->out.data, 0, 0);
 229                 if (parms->writeclose.in.count > 0) {
 230                         memcpy(req->out.data+1, parms->writeclose.in.data,
 231                                parms->writeclose.in.count);
 232                 }
 233                 break;
 234
 235         case RAW_WRITE_WRITEX:
 236                 if (tree->session->transport->negotiate.capabilities & CAP_LARGE_FILES) {
 237                         bigoffset = True;
 238                 }
 239                 SETUP_REQUEST(SMBwriteX, bigoffset ? 14 : 12, parms->writex.in.count);
 240                 SSVAL(req->out.vwv, VWV(0), 0xFF);
 241                 SSVAL(req->out.vwv, VWV(1), 0);
 242                 SSVAL(req->out.vwv, VWV(2), parms->writex.in.fnum);
 243                 SIVAL(req->out.vwv, VWV(3), parms->writex.in.offset);
 244                 SIVAL(req->out.vwv, VWV(5), 0); /* reserved */
 245                 SSVAL(req->out.vwv, VWV(7), parms->writex.in.wmode);
 246                 SSVAL(req->out.vwv, VWV(8), parms->writex.in.remaining);
 247                 SSVAL(req->out.vwv, VWV(9), parms->writex.in.count>>16);
 248                 SSVAL(req->out.vwv, VWV(10), parms->writex.in.count);
 249                 SSVAL(req->out.vwv, VWV(11), PTR_DIFF(req->out.data, req->out.hdr));
 250                 if (bigoffset) {
 251                         SIVAL(req->out.vwv,VWV(12),parms->writex.in.offset>>32);
 252                 }
 253                 if (parms->writex.in.count > 0) {
 254                         memcpy(req->out.data, parms->writex.in.data, parms->writex.in.count);
 255                 }
 256                 break;
 257
 258         case RAW_WRITE_SPLWRITE:
 259                 SETUP_REQUEST(SMBsplwr, 1, parms->splwrite.in.count);
 260                 SSVAL(req->out.vwv, VWV(0), parms->splwrite.in.fnum);
 261                 if (parms->splwrite.in.count > 0) {
 262                         memcpy(req->out.data, parms->splwrite.in.data, parms->splwrite.in.count);
 263                 }
 264                 break;
 265         }
 266
 267         if (!smbcli_request_send(req)) {
 268 smbcli_request_destroy(req);
 269                 return NULL;
 270         }
 271
 272         return req;
 273 }
 274
 275
 276 /****************************************************************************
 277  raw write interface (async recv)
 278 ****************************************************************************/
 279 NTSTATUS smb_raw_write_recv(struct smbcli_request *req, union smb_write *parms)
 280 {
 281         if (!smbcli_request_receive(req) ||
 282             smbcli_request_is_error(req)) {
 283                 goto failed;
 284         }
 285
 286         switch (parms->generic.level) {
 287         case RAW_WRITE_GENERIC:
 288                 break;
 289         case RAW_WRITE_WRITEUNLOCK:
 290                 SMBCLI_CHECK_WCT(req, 1);
 291                 parms->writeunlock.out.nwritten = SVAL(req->in.vwv, VWV(0));
 292                 break;
 293         case RAW_WRITE_WRITE:
 294                 SMBCLI_CHECK_WCT(req, 1);
 295                 parms->write.out.nwritten = SVAL(req->in.vwv, VWV(0));
 296                 break;
 297         case RAW_WRITE_WRITECLOSE:
 298                 SMBCLI_CHECK_WCT(req, 1);
 299                 parms->writeclose.out.nwritten = SVAL(req->in.vwv, VWV(0));
 300                 break;
 301         case RAW_WRITE_WRITEX:
 302                 SMBCLI_CHECK_WCT(req, 6);
 303                 parms->writex.out.nwritten  = SVAL(req->in.vwv, VWV(2));
 304                 parms->writex.out.nwritten += (CVAL(req->in.vwv, VWV(4)) << 16);
 305                 parms->writex.out.remaining = SVAL(req->in.vwv, VWV(3));
 306                 break;
 307         case RAW_WRITE_SPLWRITE:
 308                 break;
 309         }
 310
 311 failed:
 312         return smbcli_request_destroy(req);
 313 }
 314
 315 /****************************************************************************
 316  raw write interface (sync interface)
 317 ****************************************************************************/
 318 NTSTATUS smb_raw_write(struct smbcli_tree *tree, union smb_write *parms)
 319 {
 320         struct smbcli_request *req = smb_raw_write_send(tree, parms);
 321         return smb_raw_write_recv(req, parms);
 322 }