source4/smb_server/smb/nttrans.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    NT transaction handling
   4    Copyright (C) Andrew Tridgell 2003
   5    Copyright (C) James J Myers 2003 <myersjj@samba.org>
   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    This file handles the parsing of transact2 requests
  23 */
  24
  25 #include "includes.h"
  26 #include "smb_server/smb_server.h"
  27 #include "ntvfs/ntvfs.h"
  28 #include "libcli/raw/libcliraw.h"
  29
  30
  31
  32 #define CHECK_MIN_BLOB_SIZE(blob, size) do { \
  33         if ((blob)->length < (size)) { \
  34                 return NT_STATUS_INFO_LENGTH_MISMATCH; \
  35         }} while (0)
  36
  37
  38 /* setup a nttrans reply, given the data and params sizes */
  39 static void nttrans_setup_reply(struct smbsrv_request *req,
  40                                struct smb_nttrans *trans,
  41                                uint16_t param_size, uint16_t data_size,
  42                                uint16_t setup_count)
  43 {
  44         trans->out.setup_count = setup_count;
  45         if (setup_count != 0) {
  46                 trans->out.setup = talloc_zero_array(req, uint16_t, setup_count);
  47         }
  48         trans->out.params = data_blob_talloc(req, NULL, param_size);
  49         trans->out.data = data_blob_talloc(req, NULL, data_size);
  50 }
  51
  52
  53 /*
  54    parse NTTRANS_CREATE request
  55  */
  56 static NTSTATUS nttrans_create(struct smbsrv_request *req,
  57                                struct smb_nttrans *trans)
  58 {
  59         union smb_open *io;
  60         uint16_t fname_len;
  61         uint32_t sd_length, ea_length;
  62         NTSTATUS status;
  63         uint8_t *params;
  64
  65         if (trans->in.params.length < 54) {
  66                 return NT_STATUS_INVALID_PARAMETER;
  67         }
  68
  69         /* parse the request */
  70         io = talloc(req, union smb_open);
  71         if (io == NULL) {
  72                 return NT_STATUS_NO_MEMORY;
  73         }
  74
  75         io->ntcreatex.level = RAW_OPEN_NTTRANS_CREATE;
  76
  77         params = trans->in.params.data;
  78
  79         io->ntcreatex.in.flags            = IVAL(params,  0);
  80         io->ntcreatex.in.root_fid         = IVAL(params,  4);
  81         io->ntcreatex.in.access_mask      = IVAL(params,  8);
  82         io->ntcreatex.in.alloc_size       = BVAL(params, 12);
  83         io->ntcreatex.in.file_attr        = IVAL(params, 20);
  84         io->ntcreatex.in.share_access     = IVAL(params, 24);
  85         io->ntcreatex.in.open_disposition = IVAL(params, 28);
  86         io->ntcreatex.in.create_options   = IVAL(params, 32);
  87         sd_length                         = IVAL(params, 36);
  88         ea_length                         = IVAL(params, 40);
  89         fname_len                         = IVAL(params, 44);
  90         io->ntcreatex.in.impersonation    = IVAL(params, 48);
  91         io->ntcreatex.in.security_flags   = CVAL(params, 52);
  92         io->ntcreatex.in.sec_desc         = NULL;
  93         io->ntcreatex.in.ea_list          = NULL;
  94
  95         req_pull_string(req, &io->ntcreatex.in.fname,
  96                         params + 54,
  97                         trans->in.params.length - 54,
  98                         STR_NO_RANGE_CHECK | STR_TERMINATE);
  99         if (!io->ntcreatex.in.fname) {
 100                 return NT_STATUS_INVALID_PARAMETER;
 101         }
 102
 103         if (sd_length > trans->in.data.length ||
 104             ea_length > trans->in.data.length ||
 105             (sd_length+ea_length) > trans->in.data.length) {
 106                 return NT_STATUS_INVALID_PARAMETER;
 107         }
 108
 109         /* this call has an optional security descriptor */
 110         if (sd_length != 0) {
 111                 DATA_BLOB blob;
 112                 blob.data = trans->in.data.data;
 113                 blob.length = sd_length;
 114                 io->ntcreatex.in.sec_desc = talloc(io, struct security_descriptor);
 115                 if (io->ntcreatex.in.sec_desc == NULL) {
 116                         return NT_STATUS_NO_MEMORY;
 117                 }
 118                 status = ndr_pull_struct_blob(&blob, io,
 119                                               io->ntcreatex.in.sec_desc,
 120                                               (ndr_pull_flags_fn_t)ndr_pull_security_descriptor);
 121                 if (!NT_STATUS_IS_OK(status)) {
 122                         return status;
 123                 }
 124         }
 125
 126         /* and an optional ea_list */
 127         if (ea_length > 4) {
 128                 DATA_BLOB blob;
 129                 blob.data = trans->in.data.data + sd_length;
 130                 blob.length = ea_length;
 131                 io->ntcreatex.in.ea_list = talloc(io, struct smb_ea_list);
 132                 if (io->ntcreatex.in.ea_list == NULL) {
 133                         return NT_STATUS_NO_MEMORY;
 134                 }
 135
 136                 status = ea_pull_list_chained(&blob, io,
 137                                               &io->ntcreatex.in.ea_list->num_eas,
 138                                               &io->ntcreatex.in.ea_list->eas);
 139                 if (!NT_STATUS_IS_OK(status)) {
 140                         return status;
 141                 }
 142         }
 143
 144         /* call the backend - notice that we do it sync for now, until we support
 145            async nttrans requests */
 146         status = ntvfs_openfile(req, io);
 147         if (!NT_STATUS_IS_OK(status)) {
 148                 return status;
 149         }
 150
 151         trans->out.setup_count = 0;
 152         trans->out.setup       = NULL;
 153         trans->out.params      = data_blob_talloc(req, NULL, 69);
 154         trans->out.data        = data_blob(NULL, 0);
 155
 156         params = trans->out.params.data;
 157         if (params == NULL) {
 158                 return NT_STATUS_NO_MEMORY;
 159         }
 160
 161         SSVAL(params,        0, io->ntcreatex.out.oplock_level);
 162         SSVAL(params,        2, io->ntcreatex.out.fnum);
 163         SIVAL(params,        4, io->ntcreatex.out.create_action);
 164         SIVAL(params,        8, 0); /* ea error offset */
 165         push_nttime(params, 12, io->ntcreatex.out.create_time);
 166         push_nttime(params, 20, io->ntcreatex.out.access_time);
 167         push_nttime(params, 28, io->ntcreatex.out.write_time);
 168         push_nttime(params, 36, io->ntcreatex.out.change_time);
 169         SIVAL(params,       44, io->ntcreatex.out.attrib);
 170         SBVAL(params,       48, io->ntcreatex.out.alloc_size);
 171         SBVAL(params,       56, io->ntcreatex.out.size);
 172         SSVAL(params,       64, io->ntcreatex.out.file_type);
 173         SSVAL(params,       66, io->ntcreatex.out.ipc_state);
 174         SCVAL(params,       68, io->ntcreatex.out.is_directory);
 175
 176         return NT_STATUS_OK;
 177 }
 178
 179
 180 /*
 181    parse NTTRANS_QUERY_SEC_DESC request
 182  */
 183 static NTSTATUS nttrans_query_sec_desc(struct smbsrv_request *req,
 184                                        struct smb_nttrans *trans)
 185 {
 186         union smb_fileinfo *io;
 187         NTSTATUS status;
 188
 189         if (trans->in.params.length < 8) {
 190                 return NT_STATUS_INVALID_PARAMETER;
 191         }
 192
 193         /* parse the request */
 194         io = talloc(req, union smb_fileinfo);
 195         if (io == NULL) {
 196                 return NT_STATUS_NO_MEMORY;
 197         }
 198
 199         io->query_secdesc.level            = RAW_FILEINFO_SEC_DESC;
 200         io->query_secdesc.in.fnum          = SVAL(trans->in.params.data, 0);
 201         io->query_secdesc.secinfo_flags    = IVAL(trans->in.params.data, 4);
 202
 203         /* call the backend - notice that we do it sync for now, until we support
 204            async nttrans requests */
 205         status = ntvfs_qfileinfo(req, io);
 206         if (!NT_STATUS_IS_OK(status)) {
 207                 return status;
 208         }
 209
 210         trans->out.setup_count = 0;
 211         trans->out.setup       = NULL;
 212         trans->out.params      = data_blob_talloc(req, NULL, 4);
 213         trans->out.data        = data_blob(NULL, 0);
 214
 215         status = ndr_push_struct_blob(&trans->out.data, req,
 216                                       io->query_secdesc.out.sd,
 217                                       (ndr_push_flags_fn_t)ndr_push_security_descriptor);
 218         if (!NT_STATUS_IS_OK(status)) {
 219                 return status;
 220         }
 221
 222         SIVAL(trans->out.params.data, 0, trans->out.data.length);
 223
 224         return NT_STATUS_OK;
 225 }
 226
 227
 228 /*
 229    parse NTTRANS_SET_SEC_DESC request
 230  */
 231 static NTSTATUS nttrans_set_sec_desc(struct smbsrv_request *req,
 232                                        struct smb_nttrans *trans)
 233 {
 234         union smb_setfileinfo *io;
 235         NTSTATUS status;
 236
 237         if (trans->in.params.length < 8) {
 238                 return NT_STATUS_INVALID_PARAMETER;
 239         }
 240
 241         /* parse the request */
 242         io = talloc(req, union smb_setfileinfo);
 243         if (io == NULL) {
 244                 return NT_STATUS_NO_MEMORY;
 245         }
 246
 247         io->set_secdesc.level            = RAW_SFILEINFO_SEC_DESC;
 248         io->set_secdesc.file.fnum        = SVAL(trans->in.params.data, 0);
 249         io->set_secdesc.in.secinfo_flags = IVAL(trans->in.params.data, 4);
 250
 251         io->set_secdesc.in.sd = talloc(io, struct security_descriptor);
 252         if (io->set_secdesc.in.sd == NULL) {
 253                 return NT_STATUS_NO_MEMORY;
 254         }
 255
 256         status = ndr_pull_struct_blob(&trans->in.data, req,
 257                                       io->set_secdesc.in.sd,
 258                                       (ndr_pull_flags_fn_t)ndr_pull_security_descriptor);
 259         if (!NT_STATUS_IS_OK(status)) {
 260                 return status;
 261         }
 262
 263         /* call the backend - notice that we do it sync for now, until we support
 264            async nttrans requests */
 265         status = ntvfs_setfileinfo(req, io);
 266         if (!NT_STATUS_IS_OK(status)) {
 267                 return status;
 268         }
 269
 270         trans->out.setup_count = 0;
 271         trans->out.setup       = NULL;
 272         trans->out.params      = data_blob(NULL, 0);
 273         trans->out.data        = data_blob(NULL, 0);
 274
 275         return NT_STATUS_OK;
 276 }
 277
 278
 279 /* parse NTTRANS_RENAME request
 280  */
 281 static NTSTATUS nttrans_rename(struct smbsrv_request *req,
 282                                struct smb_nttrans *trans)
 283 {
 284         return NT_STATUS_FOOBAR;
 285 }
 286
 287 /*
 288    parse NTTRANS_IOCTL request
 289  */
 290 static NTSTATUS nttrans_ioctl(struct smbsrv_request *req,
 291                 struct smb_nttrans *trans)
 292 {
 293         union smb_ioctl nt;
 294         uint32_t function;
 295         uint16_t fnum;
 296         uint8_t filter;
 297         BOOL fsctl;
 298         DATA_BLOB *blob;
 299
 300         /* should have at least 4 setup words */
 301         if (trans->in.setup_count != 4) {
 302                 return NT_STATUS_INVALID_PARAMETER;
 303         }
 304
 305         function  = IVAL(trans->in.setup, 0);
 306         fnum  = SVAL(trans->in.setup, 4);
 307         fsctl = CVAL(trans->in.setup, 6);
 308         filter = CVAL(trans->in.setup, 7);
 309
 310         blob = &trans->in.data;
 311
 312         nt.ntioctl.level = RAW_IOCTL_NTIOCTL;
 313         nt.ntioctl.in.fnum = fnum;
 314         nt.ntioctl.in.function = function;
 315         nt.ntioctl.in.fsctl = fsctl;
 316         nt.ntioctl.in.filter = filter;
 317
 318         nttrans_setup_reply(req, trans, 0, 0, 1);
 319         trans->out.setup[0] = 0;
 320
 321         return ntvfs_ioctl(req, &nt);
 322 }
 323
 324 /*
 325   backend for nttrans requests
 326 */
 327 static NTSTATUS nttrans_backend(struct smbsrv_request *req,
 328                 struct smb_nttrans *trans)
 329 {
 330         /* the nttrans command is in function */
 331         switch (trans->in.function) {
 332         case NT_TRANSACT_CREATE:
 333                 return nttrans_create(req, trans);
 334         case NT_TRANSACT_IOCTL:
 335                 return nttrans_ioctl(req, trans);
 336         case NT_TRANSACT_RENAME:
 337                 return nttrans_rename(req, trans);
 338         case NT_TRANSACT_QUERY_SECURITY_DESC:
 339                 return nttrans_query_sec_desc(req, trans);
 340         case NT_TRANSACT_SET_SECURITY_DESC:
 341                 return nttrans_set_sec_desc(req, trans);
 342         }
 343
 344         /* an unknown nttrans command */
 345         return NT_STATUS_FOOBAR;
 346 }
 347
 348
 349 /****************************************************************************
 350  Reply to an SMBnttrans request
 351 ****************************************************************************/
 352 void reply_nttrans(struct smbsrv_request *req)
 353 {
 354         struct smb_nttrans trans;
 355         int i;
 356         uint16_t param_ofs, data_ofs;
 357         uint16_t param_count, data_count;
 358         uint16_t params_left, data_left;
 359         uint16_t param_total, data_total;
 360         uint8_t *params, *data;
 361         NTSTATUS status;
 362
 363         /* parse request */
 364         if (req->in.wct < 19) {
 365                 req_reply_error(req, NT_STATUS_FOOBAR);
 366                 return;
 367         }
 368
 369         trans.in.max_setup   = CVAL(req->in.vwv, 0);
 370         param_total          = IVAL(req->in.vwv, 3);
 371         data_total           = IVAL(req->in.vwv, 7);
 372         trans.in.max_param   = IVAL(req->in.vwv, 11);
 373         trans.in.max_data    = IVAL(req->in.vwv, 15);
 374         param_count          = IVAL(req->in.vwv, 19);
 375         param_ofs            = IVAL(req->in.vwv, 23);
 376         data_count           = IVAL(req->in.vwv, 27);
 377         data_ofs             = IVAL(req->in.vwv, 31);
 378         trans.in.setup_count = CVAL(req->in.vwv, 35);
 379         trans.in.function        = SVAL(req->in.vwv, 36);
 380
 381         if (req->in.wct != 19 + trans.in.setup_count) {
 382                 req_reply_dos_error(req, ERRSRV, ERRerror);
 383                 return;
 384         }
 385
 386         /* parse out the setup words */
 387         trans.in.setup = talloc_array(req, uint16_t, trans.in.setup_count);
 388         if (!trans.in.setup) {
 389                 req_reply_error(req, NT_STATUS_NO_MEMORY);
 390                 return;
 391         }
 392         for (i=0;i<trans.in.setup_count;i++) {
 393                 trans.in.setup[i] = SVAL(req->in.vwv, VWV(19+i));
 394         }
 395
 396         if (!req_pull_blob(req, req->in.hdr + param_ofs, param_count, &trans.in.params) ||
 397             !req_pull_blob(req, req->in.hdr + data_ofs, data_count, &trans.in.data)) {
 398                 req_reply_error(req, NT_STATUS_FOOBAR);
 399                 return;
 400         }
 401
 402         /* is it a partial request? if so, then send a 'send more' message */
 403         if (param_total > param_count ||
 404             data_total > data_count) {
 405                 DEBUG(0,("REWRITE: not handling partial nttrans requests!\n"));
 406                 return;
 407         }
 408
 409         /* its a full request, give it to the backend */
 410         status = nttrans_backend(req, &trans);
 411
 412         if (NT_STATUS_IS_ERR(status)) {
 413                 req_reply_error(req, status);
 414                 return;
 415         }
 416
 417 #if 0
 418         /* w2k3 does not check the max_setup count */
 419         if (trans.out.setup_count > trans.in.max_setup) {
 420                 req_reply_error(req, NT_STATUS_BUFFER_TOO_SMALL);
 421                 return;
 422         }
 423 #endif
 424         if (trans.out.params.length > trans.in.max_param) {
 425                 status = NT_STATUS_BUFFER_TOO_SMALL;
 426                 trans.out.params.length = trans.in.max_param;
 427         }
 428         if (trans.out.data.length > trans.in.max_data) {
 429                 status = NT_STATUS_BUFFER_TOO_SMALL;
 430                 trans.out.data.length = trans.in.max_data;
 431         }
 432
 433         params_left = trans.out.params.length;
 434         data_left   = trans.out.data.length;
 435         params      = trans.out.params.data;
 436         data        = trans.out.data.data;
 437
 438         req_setup_reply(req, 18 + trans.out.setup_count, 0);
 439
 440         if (!NT_STATUS_IS_OK(status)) {
 441                 req_setup_error(req, status);
 442         }
 443
 444         /* we need to divide up the reply into chunks that fit into
 445            the negotiated buffer size */
 446         do {
 447                 uint16_t this_data, this_param, max_bytes;
 448                 uint_t align1 = 1, align2 = (params_left ? 2 : 0);
 449                 struct smbsrv_request *this_req;
 450
 451                 max_bytes = req_max_data(req) - (align1 + align2);
 452
 453                 this_param = params_left;
 454                 if (this_param > max_bytes) {
 455                         this_param = max_bytes;
 456                 }
 457                 max_bytes -= this_param;
 458
 459                 this_data = data_left;
 460                 if (this_data > max_bytes) {
 461                         this_data = max_bytes;
 462                 }
 463
 464                 /* don't destroy unless this is the last chunk */
 465                 if (params_left - this_param != 0 ||
 466                     data_left - this_data != 0) {
 467                         this_req = req_setup_secondary(req);
 468                 } else {
 469                         this_req = req;
 470                 }
 471
 472                 req_grow_data(req, this_param + this_data + (align1 + align2));
 473
 474                 SSVAL(this_req->out.vwv, 0, 0); /* reserved */
 475                 SCVAL(this_req->out.vwv, 2, 0); /* reserved */
 476                 SIVAL(this_req->out.vwv, 3, trans.out.params.length);
 477                 SIVAL(this_req->out.vwv, 7, trans.out.data.length);
 478
 479                 SIVAL(this_req->out.vwv, 11, this_param);
 480                 SIVAL(this_req->out.vwv, 15, align1 + PTR_DIFF(this_req->out.data, this_req->out.hdr));
 481                 SIVAL(this_req->out.vwv, 19, PTR_DIFF(params, trans.out.params.data));
 482
 483                 SIVAL(this_req->out.vwv, 23, this_data);
 484                 SIVAL(this_req->out.vwv, 27, align1 + align2 +
 485                       PTR_DIFF(this_req->out.data + this_param, this_req->out.hdr));
 486                 SIVAL(this_req->out.vwv, 31, PTR_DIFF(data, trans.out.data.data));
 487
 488                 SCVAL(this_req->out.vwv, 35, trans.out.setup_count);
 489                 for (i=0;i<trans.out.setup_count;i++) {
 490                         SSVAL(this_req->out.vwv, VWV(18+i), trans.out.setup[i]);
 491                 }
 492
 493                 memset(this_req->out.data, 0, align1);
 494                 if (this_param != 0) {
 495                         memcpy(this_req->out.data + align1, params, this_param);
 496                 }
 497                 memset(this_req->out.data+this_param+align1, 0, align2);
 498                 if (this_data != 0) {
 499                         memcpy(this_req->out.data+this_param+align1+align2,
 500                                data, this_data);
 501                 }
 502
 503                 params_left -= this_param;
 504                 data_left -= this_data;
 505                 params += this_param;
 506                 data += this_data;
 507
 508                 req_send_reply(this_req);
 509         } while (params_left != 0 || data_left != 0);
 510 }
 511
 512
 513 /****************************************************************************
 514  Reply to an SMBnttranss request
 515 ****************************************************************************/
 516 void reply_nttranss(struct smbsrv_request *req)
 517 {
 518         req_reply_error(req, NT_STATUS_FOOBAR);
 519 }