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                 if (bigoffset) {
  85                         SIVAL(req->out.vwv, VWV(10),parms->readx.in.offset>>32);
  86                 }
  87                 if (parms->readx.in.read_for_execute) {
  88                         uint16_t flags2 = SVAL(req->out.hdr, HDR_FLG2);
  89                         flags2 |= FLAGS2_READ_PERMIT_EXECUTE;
  90                         SSVAL(req->out.hdr, HDR_FLG2, flags2);
  91                 }
  92                 break;
  93         }
  94
  95         if (!smbcli_request_send(req)) {
  96                 smbcli_request_destroy(req);
  97                 return NULL;
  98         }
  99
 100         /* the transport layer needs to know that a readbraw is pending
 101            and handle receives a little differently */
 102         if (parms->generic.level == RAW_READ_READBRAW) {
 103                 tree->session->transport->readbraw_pending = 1;
 104         }
 105
 106         return req;
 107 }
 108
 109 /****************************************************************************
 110  low level read operation (async recv)
 111 ****************************************************************************/
 112 NTSTATUS smb_raw_read_recv(struct smbcli_request *req, union smb_read *parms)
 113 {
 114         if (!smbcli_request_receive(req) ||
 115             smbcli_request_is_error(req)) {
 116                 goto failed;
 117         }
 118
 119         switch (parms->generic.level) {
 120         case RAW_READ_READBRAW:
 121                 parms->readbraw.out.nread = req->in.size - NBT_HDR_SIZE;
 122                 if (parms->readbraw.out.nread >
 123                     MAX(parms->readx.in.mincnt, parms->readx.in.maxcnt)) {
 124                         req->status = NT_STATUS_BUFFER_TOO_SMALL;
 125                         goto failed;
 126                 }
 127                 memcpy(parms->readbraw.out.data, req->in.buffer + NBT_HDR_SIZE, parms->readbraw.out.nread);
 128                 break;
 129
 130         case RAW_READ_LOCKREAD:
 131                 SMBCLI_CHECK_WCT(req, 5);
 132                 parms->lockread.out.nread = SVAL(req->in.vwv, VWV(0));
 133                 if (parms->lockread.out.nread > parms->lockread.in.count ||
 134                     !smbcli_raw_pull_data(req, req->in.data+3,
 135                                        parms->lockread.out.nread, parms->lockread.out.data)) {
 136                         req->status = NT_STATUS_BUFFER_TOO_SMALL;
 137                 }
 138                 break;
 139
 140         case RAW_READ_READ:
 141                 /* there are 4 reserved words in the reply */
 142                 SMBCLI_CHECK_WCT(req, 5);
 143                 parms->read.out.nread = SVAL(req->in.vwv, VWV(0));
 144                 if (parms->read.out.nread > parms->read.in.count ||
 145                     !smbcli_raw_pull_data(req, req->in.data+3,
 146                                        parms->read.out.nread, parms->read.out.data)) {
 147                         req->status = NT_STATUS_BUFFER_TOO_SMALL;
 148                 }
 149                 break;
 150
 151         case RAW_READ_READX:
 152                 /* there are 5 reserved words in the reply */
 153                 SMBCLI_CHECK_WCT(req, 12);
 154                 parms->readx.out.remaining       = SVAL(req->in.vwv, VWV(2));
 155                 parms->readx.out.compaction_mode = SVAL(req->in.vwv, VWV(3));
 156                 parms->readx.out.nread = SVAL(req->in.vwv, VWV(5));
 157                 if (parms->readx.out.nread > MAX(parms->readx.in.mincnt, parms->readx.in.maxcnt) ||
 158                     !smbcli_raw_pull_data(req, req->in.hdr + SVAL(req->in.vwv, VWV(6)),
 159                                        parms->readx.out.nread,
 160                                        parms->readx.out.data)) {
 161                         req->status = NT_STATUS_BUFFER_TOO_SMALL;
 162                 }
 163                 break;
 164         }
 165
 166 failed:
 167         return smbcli_request_destroy(req);
 168 }
 169
 170 /****************************************************************************
 171  low level read operation (sync interface)
 172 ****************************************************************************/
 173 NTSTATUS smb_raw_read(struct smbcli_tree *tree, union smb_read *parms)
 174 {
 175         struct smbcli_request *req = smb_raw_read_send(tree, parms);
 176         return smb_raw_read_recv(req, parms);
 177 }
 178
 179
 180 /****************************************************************************
 181  raw write interface (async send)
 182 ****************************************************************************/
 183 struct smbcli_request *smb_raw_write_send(struct smbcli_tree *tree, union smb_write *parms)
 184 {
 185         BOOL bigoffset = False;
 186         struct smbcli_request *req = NULL;
 187
 188         switch (parms->generic.level) {
 189         case RAW_WRITE_WRITEUNLOCK:
 190                 SETUP_REQUEST(SMBwriteunlock, 5, 3 + parms->writeunlock.in.count);
 191                 SSVAL(req->out.vwv, VWV(0), parms->writeunlock.in.file.fnum);
 192                 SSVAL(req->out.vwv, VWV(1), parms->writeunlock.in.count);
 193                 SIVAL(req->out.vwv, VWV(2), parms->writeunlock.in.offset);
 194                 SSVAL(req->out.vwv, VWV(4), parms->writeunlock.in.remaining);
 195                 SCVAL(req->out.data, 0, SMB_DATA_BLOCK);
 196                 SSVAL(req->out.data, 1, parms->writeunlock.in.count);
 197                 if (parms->writeunlock.in.count > 0) {
 198                         memcpy(req->out.data+3, parms->writeunlock.in.data,
 199                                parms->writeunlock.in.count);
 200                 }
 201                 break;
 202
 203         case RAW_WRITE_WRITE:
 204                 SETUP_REQUEST(SMBwrite, 5,  3 + parms->write.in.count);
 205                 SSVAL(req->out.vwv, VWV(0), parms->write.in.file.fnum);
 206                 SSVAL(req->out.vwv, VWV(1), parms->write.in.count);
 207                 SIVAL(req->out.vwv, VWV(2), parms->write.in.offset);
 208                 SSVAL(req->out.vwv, VWV(4), parms->write.in.remaining);
 209                 SCVAL(req->out.data, 0, SMB_DATA_BLOCK);
 210                 SSVAL(req->out.data, 1, parms->write.in.count);
 211                 if (parms->write.in.count > 0) {
 212                         memcpy(req->out.data+3, parms->write.in.data, parms->write.in.count);
 213                 }
 214                 break;
 215
 216         case RAW_WRITE_WRITECLOSE:
 217                 SETUP_REQUEST(SMBwriteclose, 6, 1 + parms->writeclose.in.count);
 218                 SSVAL(req->out.vwv, VWV(0), parms->writeclose.in.file.fnum);
 219                 SSVAL(req->out.vwv, VWV(1), parms->writeclose.in.count);
 220                 SIVAL(req->out.vwv, VWV(2), parms->writeclose.in.offset);
 221                 raw_push_dos_date3(tree->session->transport,
 222                                   req->out.vwv, VWV(4), parms->writeclose.in.mtime);
 223                 SCVAL(req->out.data, 0, 0);
 224                 if (parms->writeclose.in.count > 0) {
 225                         memcpy(req->out.data+1, parms->writeclose.in.data,
 226                                parms->writeclose.in.count);
 227                 }
 228                 break;
 229
 230         case RAW_WRITE_WRITEX:
 231                 if (tree->session->transport->negotiate.capabilities & CAP_LARGE_FILES) {
 232                         bigoffset = True;
 233                 }
 234                 SETUP_REQUEST(SMBwriteX, bigoffset ? 14 : 12, parms->writex.in.count);
 235                 SSVAL(req->out.vwv, VWV(0), SMB_CHAIN_NONE);
 236                 SSVAL(req->out.vwv, VWV(1), 0);
 237                 SSVAL(req->out.vwv, VWV(2), parms->writex.in.file.fnum);
 238                 SIVAL(req->out.vwv, VWV(3), parms->writex.in.offset);
 239                 SIVAL(req->out.vwv, VWV(5), 0); /* reserved */
 240                 SSVAL(req->out.vwv, VWV(7), parms->writex.in.wmode);
 241                 SSVAL(req->out.vwv, VWV(8), parms->writex.in.remaining);
 242                 SSVAL(req->out.vwv, VWV(9), parms->writex.in.count>>16);
 243                 SSVAL(req->out.vwv, VWV(10), parms->writex.in.count);
 244                 SSVAL(req->out.vwv, VWV(11), PTR_DIFF(req->out.data, req->out.hdr));
 245                 if (bigoffset) {
 246                         SIVAL(req->out.vwv,VWV(12),parms->writex.in.offset>>32);
 247                 }
 248                 if (parms->writex.in.count > 0) {
 249                         memcpy(req->out.data, parms->writex.in.data, parms->writex.in.count);
 250                 }
 251                 break;
 252
 253         case RAW_WRITE_SPLWRITE:
 254                 SETUP_REQUEST(SMBsplwr, 1, parms->splwrite.in.count);
 255                 SSVAL(req->out.vwv, VWV(0), parms->splwrite.in.file.fnum);
 256                 if (parms->splwrite.in.count > 0) {
 257                         memcpy(req->out.data, parms->splwrite.in.data, parms->splwrite.in.count);
 258                 }
 259                 break;
 260         }
 261
 262         if (!smbcli_request_send(req)) {
 263                 smbcli_request_destroy(req);
 264                 return NULL;
 265         }
 266
 267         return req;
 268 }
 269
 270
 271 /****************************************************************************
 272  raw write interface (async recv)
 273 ****************************************************************************/
 274 NTSTATUS smb_raw_write_recv(struct smbcli_request *req, union smb_write *parms)
 275 {
 276         if (!smbcli_request_receive(req) ||
 277             smbcli_request_is_error(req)) {
 278                 goto failed;
 279         }
 280
 281         switch (parms->generic.level) {
 282         case RAW_WRITE_WRITEUNLOCK:
 283                 SMBCLI_CHECK_WCT(req, 1);
 284                 parms->writeunlock.out.nwritten = SVAL(req->in.vwv, VWV(0));
 285                 break;
 286         case RAW_WRITE_WRITE:
 287                 SMBCLI_CHECK_WCT(req, 1);
 288                 parms->write.out.nwritten = SVAL(req->in.vwv, VWV(0));
 289                 break;
 290         case RAW_WRITE_WRITECLOSE:
 291                 SMBCLI_CHECK_WCT(req, 1);
 292                 parms->writeclose.out.nwritten = SVAL(req->in.vwv, VWV(0));
 293                 break;
 294         case RAW_WRITE_WRITEX:
 295                 SMBCLI_CHECK_WCT(req, 6);
 296                 parms->writex.out.nwritten  = SVAL(req->in.vwv, VWV(2));
 297                 parms->writex.out.nwritten += (CVAL(req->in.vwv, VWV(4)) << 16);
 298                 parms->writex.out.remaining = SVAL(req->in.vwv, VWV(3));
 299                 break;
 300         case RAW_WRITE_SPLWRITE:
 301                 break;
 302         }
 303
 304 failed:
 305         return smbcli_request_destroy(req);
 306 }
 307
 308 /****************************************************************************
 309  raw write interface (sync interface)
 310 ****************************************************************************/
 311 NTSTATUS smb_raw_write(struct smbcli_tree *tree, union smb_write *parms)
 312 {
 313         struct smbcli_request *req = smb_raw_write_send(tree, parms);
 314         return smb_raw_write_recv(req, parms);
 315 }