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