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