source3/smbd/smb2_getinfo.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Core SMB2 server
   4
   5    Copyright (C) Stefan Metzmacher 2009
   6    Copyright (C) Jeremy Allison 2010
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "smbd/smbd.h"
  24 #include "smbd/globals.h"
  25 #include "../libcli/smb/smb_common.h"
  26 #include "trans2.h"
  27 #include "../lib/util/tevent_ntstatus.h"
  28
  29 static struct tevent_req *smbd_smb2_getinfo_send(TALLOC_CTX *mem_ctx,
  30                                                  struct tevent_context *ev,
  31                                                  struct smbd_smb2_request *smb2req,
  32                                                  struct files_struct *in_fsp,
  33                                                  uint8_t in_info_type,
  34                                                  uint8_t in_file_info_class,
  35                                                  uint32_t in_output_buffer_length,
  36                                                  DATA_BLOB in_input_buffer,
  37                                                  uint32_t in_additional_information,
  38                                                  uint32_t in_flags);
  39 static NTSTATUS smbd_smb2_getinfo_recv(struct tevent_req *req,
  40                                        TALLOC_CTX *mem_ctx,
  41                                        DATA_BLOB *out_output_buffer,
  42                                        NTSTATUS *p_call_status);
  43
  44 static void smbd_smb2_request_getinfo_done(struct tevent_req *subreq);
  45 NTSTATUS smbd_smb2_request_process_getinfo(struct smbd_smb2_request *req)
  46 {
  47         struct smbXsrv_connection *xconn = req->xconn;
  48         NTSTATUS status;
  49         const uint8_t *inbody;
  50         uint8_t in_info_type;
  51         uint8_t in_file_info_class;
  52         uint32_t in_output_buffer_length;
  53         uint16_t in_input_buffer_offset;
  54         uint32_t in_input_buffer_length;
  55         DATA_BLOB in_input_buffer;
  56         uint32_t in_additional_information;
  57         uint32_t in_flags;
  58         uint64_t in_file_id_persistent;
  59         uint64_t in_file_id_volatile;
  60         struct files_struct *in_fsp;
  61         struct tevent_req *subreq;
  62
  63         status = smbd_smb2_request_verify_sizes(req, 0x29);
  64         if (!NT_STATUS_IS_OK(status)) {
  65                 return smbd_smb2_request_error(req, status);
  66         }
  67         inbody = SMBD_SMB2_IN_BODY_PTR(req);
  68
  69         in_info_type                    = CVAL(inbody, 0x02);
  70         in_file_info_class              = CVAL(inbody, 0x03);
  71         in_output_buffer_length         = IVAL(inbody, 0x04);
  72         in_input_buffer_offset          = SVAL(inbody, 0x08);
  73         /* 0x0A 2 bytes reserved */
  74         in_input_buffer_length          = IVAL(inbody, 0x0C);
  75         in_additional_information       = IVAL(inbody, 0x10);
  76         in_flags                        = IVAL(inbody, 0x14);
  77         in_file_id_persistent           = BVAL(inbody, 0x18);
  78         in_file_id_volatile             = BVAL(inbody, 0x20);
  79
  80         if (in_input_buffer_offset == 0 && in_input_buffer_length == 0) {
  81                 /* This is ok */
  82         } else if (in_input_buffer_offset !=
  83                    (SMB2_HDR_BODY + SMBD_SMB2_IN_BODY_LEN(req))) {
  84                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  85         }
  86
  87         if (in_input_buffer_length > SMBD_SMB2_IN_DYN_LEN(req)) {
  88                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  89         }
  90
  91         in_input_buffer.data = SMBD_SMB2_IN_DYN_PTR(req);
  92         in_input_buffer.length = in_input_buffer_length;
  93
  94         if (in_input_buffer.length > xconn->smb2.server.max_trans) {
  95                 DEBUG(2,("smbd_smb2_request_process_getinfo: "
  96                          "client ignored max trans: %s: 0x%08X: 0x%08X\n",
  97                          __location__, (unsigned)in_input_buffer.length,
  98                          (unsigned)xconn->smb2.server.max_trans));
  99                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
 100         }
 101         if (in_output_buffer_length > xconn->smb2.server.max_trans) {
 102                 DEBUG(2,("smbd_smb2_request_process_getinfo: "
 103                          "client ignored max trans: %s: 0x%08X: 0x%08X\n",
 104                          __location__, in_output_buffer_length,
 105                          xconn->smb2.server.max_trans));
 106                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
 107         }
 108
 109         status = smbd_smb2_request_verify_creditcharge(req,
 110                         MAX(in_input_buffer.length,in_output_buffer_length));
 111         if (!NT_STATUS_IS_OK(status)) {
 112                 return smbd_smb2_request_error(req, status);
 113         }
 114
 115         in_fsp = file_fsp_smb2(req, in_file_id_persistent, in_file_id_volatile);
 116         if (in_fsp == NULL) {
 117                 return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
 118         }
 119
 120         subreq = smbd_smb2_getinfo_send(req, req->sconn->ev_ctx,
 121                                         req, in_fsp,
 122                                         in_info_type,
 123                                         in_file_info_class,
 124                                         in_output_buffer_length,
 125                                         in_input_buffer,
 126                                         in_additional_information,
 127                                         in_flags);
 128         if (subreq == NULL) {
 129                 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 130         }
 131         tevent_req_set_callback(subreq, smbd_smb2_request_getinfo_done, req);
 132
 133         return smbd_smb2_request_pending_queue(req, subreq, 500);
 134 }
 135
 136 static void smbd_smb2_request_getinfo_done(struct tevent_req *subreq)
 137 {
 138         struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
 139                                         struct smbd_smb2_request);
 140         DATA_BLOB outbody;
 141         DATA_BLOB outdyn;
 142         uint16_t out_output_buffer_offset;
 143         DATA_BLOB out_output_buffer = data_blob_null;
 144         NTSTATUS status;
 145         NTSTATUS call_status = NT_STATUS_OK;
 146         NTSTATUS error; /* transport error */
 147
 148         status = smbd_smb2_getinfo_recv(subreq,
 149                                         req,
 150                                         &out_output_buffer,
 151                                         &call_status);
 152         TALLOC_FREE(subreq);
 153         if (!NT_STATUS_IS_OK(status)) {
 154                 error = smbd_smb2_request_error(req, status);
 155                 if (!NT_STATUS_IS_OK(error)) {
 156                         smbd_server_connection_terminate(req->xconn,
 157                                                          nt_errstr(error));
 158                         return;
 159                 }
 160                 return;
 161         }
 162
 163         /* some GetInfo responses set STATUS_BUFFER_OVERFLOW and return partial,
 164            but valid data */
 165         if (!(NT_STATUS_IS_OK(call_status) ||
 166               NT_STATUS_EQUAL(call_status, STATUS_BUFFER_OVERFLOW))) {
 167                 /* Return a specific error with data. */
 168                 error = smbd_smb2_request_error_ex(req,
 169                                                 call_status,
 170                                                 &out_output_buffer,
 171                                                 __location__);
 172                 if (!NT_STATUS_IS_OK(error)) {
 173                         smbd_server_connection_terminate(req->xconn,
 174                                                          nt_errstr(error));
 175                         return;
 176                 }
 177                 return;
 178         }
 179
 180         out_output_buffer_offset = SMB2_HDR_BODY + 0x08;
 181
 182         outbody = smbd_smb2_generate_outbody(req, 0x08);
 183         if (outbody.data == NULL) {
 184                 error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 185                 if (!NT_STATUS_IS_OK(error)) {
 186                         smbd_server_connection_terminate(req->xconn,
 187                                                          nt_errstr(error));
 188                         return;
 189                 }
 190                 return;
 191         }
 192
 193         SSVAL(outbody.data, 0x00, 0x08 + 1);    /* struct size */
 194         SSVAL(outbody.data, 0x02,
 195               out_output_buffer_offset);        /* output buffer offset */
 196         SIVAL(outbody.data, 0x04,
 197               out_output_buffer.length);        /* output buffer length */
 198
 199         outdyn = out_output_buffer;
 200
 201         error = smbd_smb2_request_done_ex(req, call_status, outbody, &outdyn, __location__);
 202         if (!NT_STATUS_IS_OK(error)) {
 203                 smbd_server_connection_terminate(req->xconn,
 204                                                  nt_errstr(error));
 205                 return;
 206         }
 207 }
 208
 209 struct smbd_smb2_getinfo_state {
 210         struct smbd_smb2_request *smb2req;
 211         NTSTATUS status;
 212         DATA_BLOB out_output_buffer;
 213 };
 214
 215 static void smb2_ipc_getinfo(struct tevent_req *req,
 216                                 struct smbd_smb2_getinfo_state *state,
 217                                 struct tevent_context *ev,
 218                                 uint8_t in_info_type,
 219                                 uint8_t in_file_info_class)
 220 {
 221         /* We want to reply to SMB2_GETINFO_FILE
 222            with a class of SMB2_FILE_STANDARD_INFO as
 223            otherwise a Win7 client issues this request
 224            twice (2xroundtrips) if we return NOT_SUPPORTED.
 225            NB. We do the same for SMB1 in call_trans2qpipeinfo() */
 226
 227         if (in_info_type == 0x01 && /* SMB2_GETINFO_FILE */
 228                         in_file_info_class == 0x05) { /* SMB2_FILE_STANDARD_INFO */
 229                 state->out_output_buffer = data_blob_talloc(state,
 230                                                 NULL, 24);
 231                 if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 232                         return;
 233                 }
 234
 235                 memset(state->out_output_buffer.data,0,24);
 236                 SOFF_T(state->out_output_buffer.data,0,4096LL);
 237                 SIVAL(state->out_output_buffer.data,16,1);
 238                 SIVAL(state->out_output_buffer.data,20,1);
 239                 tevent_req_done(req);
 240         } else {
 241                 tevent_req_nterror(req, NT_STATUS_NOT_SUPPORTED);
 242         }
 243 }
 244
 245 static struct tevent_req *smbd_smb2_getinfo_send(TALLOC_CTX *mem_ctx,
 246                                                  struct tevent_context *ev,
 247                                                  struct smbd_smb2_request *smb2req,
 248                                                  struct files_struct *fsp,
 249                                                  uint8_t in_info_type,
 250                                                  uint8_t in_file_info_class,
 251                                                  uint32_t in_output_buffer_length,
 252                                                  DATA_BLOB in_input_buffer,
 253                                                  uint32_t in_additional_information,
 254                                                  uint32_t in_flags)
 255 {
 256         struct tevent_req *req;
 257         struct smbd_smb2_getinfo_state *state;
 258         struct smb_request *smbreq;
 259         connection_struct *conn = smb2req->tcon->compat;
 260         NTSTATUS status;
 261
 262         req = tevent_req_create(mem_ctx, &state,
 263                                 struct smbd_smb2_getinfo_state);
 264         if (req == NULL) {
 265                 return NULL;
 266         }
 267         state->smb2req = smb2req;
 268         state->status = NT_STATUS_OK;
 269         state->out_output_buffer = data_blob_null;
 270
 271         DEBUG(10,("smbd_smb2_getinfo_send: %s - %s\n",
 272                   fsp_str_dbg(fsp), fsp_fnum_dbg(fsp)));
 273
 274         smbreq = smbd_smb2_fake_smb_request(smb2req);
 275         if (tevent_req_nomem(smbreq, req)) {
 276                 return tevent_req_post(req, ev);
 277         }
 278
 279         if (IS_IPC(conn)) {
 280                 smb2_ipc_getinfo(req, state, ev,
 281                         in_info_type, in_file_info_class);
 282                 return tevent_req_post(req, ev);
 283         }
 284
 285         switch (in_info_type) {
 286         case SMB2_GETINFO_FILE:
 287         {
 288                 uint16_t file_info_level;
 289                 char *data = NULL;
 290                 unsigned int data_size = 0;
 291                 bool delete_pending = false;
 292                 struct timespec write_time_ts;
 293                 struct file_id fileid;
 294                 struct ea_list *ea_list = NULL;
 295                 int lock_data_count = 0;
 296                 char *lock_data = NULL;
 297                 size_t fixed_portion;
 298
 299                 ZERO_STRUCT(write_time_ts);
 300
 301                 switch (in_file_info_class) {
 302                 case 0x0F:/* RAW_FILEINFO_SMB2_ALL_EAS */
 303                         file_info_level = 0xFF00 | in_file_info_class;
 304                         break;
 305
 306                 case 0x12:/* RAW_FILEINFO_SMB2_ALL_INFORMATION */
 307                         file_info_level = 0xFF00 | in_file_info_class;
 308                         break;
 309
 310                 default:
 311                         /* the levels directly map to the passthru levels */
 312                         file_info_level = in_file_info_class + 1000;
 313                         break;
 314                 }
 315
 316                 if (fsp->fake_file_handle) {
 317                         /*
 318                          * This is actually for the QUOTA_FAKE_FILE --metze
 319                          */
 320
 321                         /* We know this name is ok, it's already passed the checks. */
 322
 323                 } else if (fsp->fh->fd == -1) {
 324                         /*
 325                          * This is actually a QFILEINFO on a directory
 326                          * handle (returned from an NT SMB). NT5.0 seems
 327                          * to do this call. JRA.
 328                          */
 329
 330                         if (INFO_LEVEL_IS_UNIX(file_info_level)) {
 331                                 /* Always do lstat for UNIX calls. */
 332                                 if (SMB_VFS_LSTAT(conn, fsp->fsp_name)) {
 333                                         DEBUG(3,("smbd_smb2_getinfo_send: "
 334                                                  "SMB_VFS_LSTAT of %s failed "
 335                                                  "(%s)\n", fsp_str_dbg(fsp),
 336                                                  strerror(errno)));
 337                                         status = map_nt_error_from_unix(errno);
 338                                         tevent_req_nterror(req, status);
 339                                         return tevent_req_post(req, ev);
 340                                 }
 341                         } else if (SMB_VFS_STAT(conn, fsp->fsp_name)) {
 342                                 DEBUG(3,("smbd_smb2_getinfo_send: "
 343                                          "SMB_VFS_STAT of %s failed (%s)\n",
 344                                          fsp_str_dbg(fsp),
 345                                          strerror(errno)));
 346                                 status = map_nt_error_from_unix(errno);
 347                                 tevent_req_nterror(req, status);
 348                                 return tevent_req_post(req, ev);
 349                         }
 350
 351                         fileid = vfs_file_id_from_sbuf(conn,
 352                                                        &fsp->fsp_name->st);
 353                         get_file_infos(fileid, fsp->name_hash,
 354                                 &delete_pending, &write_time_ts);
 355                 } else {
 356                         /*
 357                          * Original code - this is an open file.
 358                          */
 359
 360                         if (SMB_VFS_FSTAT(fsp, &fsp->fsp_name->st) != 0) {
 361                                 DEBUG(3, ("smbd_smb2_getinfo_send: "
 362                                           "fstat of %s failed (%s)\n",
 363                                           fsp_fnum_dbg(fsp), strerror(errno)));
 364                                 status = map_nt_error_from_unix(errno);
 365                                 tevent_req_nterror(req, status);
 366                                 return tevent_req_post(req, ev);
 367                         }
 368                         fileid = vfs_file_id_from_sbuf(conn,
 369                                                        &fsp->fsp_name->st);
 370                         get_file_infos(fileid, fsp->name_hash,
 371                                 &delete_pending, &write_time_ts);
 372                 }
 373
 374                 status = smbd_do_qfilepathinfo(conn, state,
 375                                                file_info_level,
 376                                                fsp,
 377                                                fsp->fsp_name,
 378                                                delete_pending,
 379                                                write_time_ts,
 380                                                ea_list,
 381                                                lock_data_count,
 382                                                lock_data,
 383                                                STR_UNICODE,
 384                                                in_output_buffer_length,
 385                                                &fixed_portion,
 386                                                &data,
 387                                                &data_size);
 388                 if (!NT_STATUS_IS_OK(status)) {
 389                         SAFE_FREE(data);
 390                         if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_LEVEL)) {
 391                                 status = NT_STATUS_INVALID_INFO_CLASS;
 392                         }
 393                         tevent_req_nterror(req, status);
 394                         return tevent_req_post(req, ev);
 395                 }
 396                 if (in_output_buffer_length < fixed_portion) {
 397                         SAFE_FREE(data);
 398                         tevent_req_nterror(
 399                                 req, NT_STATUS_INFO_LENGTH_MISMATCH);
 400                         return tevent_req_post(req, ev);
 401                 }
 402                 if (data_size > 0) {
 403                         state->out_output_buffer = data_blob_talloc(state,
 404                                                                     data,
 405                                                                     data_size);
 406                         SAFE_FREE(data);
 407                         if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 408                                 return tevent_req_post(req, ev);
 409                         }
 410                         if (data_size > in_output_buffer_length) {
 411                                 state->out_output_buffer.length =
 412                                         in_output_buffer_length;
 413                                 status = STATUS_BUFFER_OVERFLOW;
 414                         }
 415                 }
 416                 SAFE_FREE(data);
 417                 break;
 418         }
 419
 420         case SMB2_GETINFO_FS:
 421         {
 422                 uint16_t file_info_level;
 423                 char *data = NULL;
 424                 int data_size = 0;
 425                 size_t fixed_portion;
 426
 427                 /* the levels directly map to the passthru levels */
 428                 file_info_level = in_file_info_class + 1000;
 429
 430                 status = smbd_do_qfsinfo(smb2req->xconn, conn, state,
 431                                          file_info_level,
 432                                          STR_UNICODE,
 433                                          in_output_buffer_length,
 434                                          &fixed_portion,
 435                                          fsp->fsp_name,
 436                                          &data,
 437                                          &data_size);
 438                 /* some responses set STATUS_BUFFER_OVERFLOW and return
 439                    partial, but valid data */
 440                 if (!(NT_STATUS_IS_OK(status) ||
 441                       NT_STATUS_EQUAL(status, STATUS_BUFFER_OVERFLOW))) {
 442                         SAFE_FREE(data);
 443                         if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_LEVEL)) {
 444                                 status = NT_STATUS_INVALID_INFO_CLASS;
 445                         }
 446                         tevent_req_nterror(req, status);
 447                         return tevent_req_post(req, ev);
 448                 }
 449                 if (in_output_buffer_length < fixed_portion) {
 450                         SAFE_FREE(data);
 451                         tevent_req_nterror(
 452                                 req, NT_STATUS_INFO_LENGTH_MISMATCH);
 453                         return tevent_req_post(req, ev);
 454                 }
 455                 if (data_size > 0) {
 456                         state->out_output_buffer = data_blob_talloc(state,
 457                                                                     data,
 458                                                                     data_size);
 459                         SAFE_FREE(data);
 460                         if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 461                                 return tevent_req_post(req, ev);
 462                         }
 463                         if (data_size > in_output_buffer_length) {
 464                                 state->out_output_buffer.length =
 465                                         in_output_buffer_length;
 466                                 status = STATUS_BUFFER_OVERFLOW;
 467                         }
 468                 }
 469                 SAFE_FREE(data);
 470                 break;
 471         }
 472
 473         case SMB2_GETINFO_SECURITY:
 474         {
 475                 uint8_t *p_marshalled_sd = NULL;
 476                 size_t sd_size = 0;
 477
 478                 status = smbd_do_query_security_desc(conn,
 479                                 state,
 480                                 fsp,
 481                                 /* Security info wanted. */
 482                                 in_additional_information &
 483                                 SMB_SUPPORTED_SECINFO_FLAGS,
 484                                 in_output_buffer_length,
 485                                 &p_marshalled_sd,
 486                                 &sd_size);
 487
 488                 if (NT_STATUS_EQUAL(status, NT_STATUS_BUFFER_TOO_SMALL)) {
 489                         /* Return needed size. */
 490                         state->out_output_buffer = data_blob_talloc(state,
 491                                                                     NULL,
 492                                                                     4);
 493                         if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 494                                 return tevent_req_post(req, ev);
 495                         }
 496                         SIVAL(state->out_output_buffer.data,0,(uint32_t)sd_size);
 497                         state->status = NT_STATUS_BUFFER_TOO_SMALL;
 498                         break;
 499                 }
 500                 if (!NT_STATUS_IS_OK(status)) {
 501                         DEBUG(10,("smbd_smb2_getinfo_send: "
 502                                  "smbd_do_query_security_desc of %s failed "
 503                                  "(%s)\n", fsp_str_dbg(fsp),
 504                                  nt_errstr(status)));
 505                         tevent_req_nterror(req, status);
 506                         return tevent_req_post(req, ev);
 507                 }
 508
 509                 if (sd_size > 0) {
 510                         state->out_output_buffer = data_blob_talloc(state,
 511                                                                     p_marshalled_sd,
 512                                                                     sd_size);
 513                         if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 514                                 return tevent_req_post(req, ev);
 515                         }
 516                 }
 517                 break;
 518         }
 519
 520         case SMB2_GETINFO_QUOTA:
 521                 tevent_req_nterror(req, NT_STATUS_NOT_SUPPORTED);
 522                 return tevent_req_post(req, ev);
 523
 524         default:
 525                 DEBUG(10,("smbd_smb2_getinfo_send: "
 526                         "unknown in_info_type of %u "
 527                         " for file %s\n",
 528                         (unsigned int)in_info_type,
 529                         fsp_str_dbg(fsp) ));
 530
 531                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 532                 return tevent_req_post(req, ev);
 533         }
 534
 535         state->status = status;
 536         tevent_req_done(req);
 537         return tevent_req_post(req, ev);
 538 }
 539
 540 static NTSTATUS smbd_smb2_getinfo_recv(struct tevent_req *req,
 541                                        TALLOC_CTX *mem_ctx,
 542                                        DATA_BLOB *out_output_buffer,
 543                                        NTSTATUS *pstatus)
 544 {
 545         NTSTATUS status;
 546         struct smbd_smb2_getinfo_state *state = tevent_req_data(req,
 547                                                 struct smbd_smb2_getinfo_state);
 548
 549         if (tevent_req_is_nterror(req, &status)) {
 550                 tevent_req_received(req);
 551                 return status;
 552         }
 553
 554         *out_output_buffer = state->out_output_buffer;
 555         talloc_steal(mem_ctx, out_output_buffer->data);
 556         *pstatus = state->status;
 557
 558         tevent_req_received(req);
 559         return NT_STATUS_OK;
 560 }