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         NTSTATUS status;
  48         const uint8_t *inbody;
  49         int i = req->current_idx;
  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 = (const uint8_t *)req->in.vector[i+1].iov_base;
  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 + req->in.vector[i+1].iov_len)) {
  84                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  85         }
  86
  87         if (in_input_buffer_length > req->in.vector[i+2].iov_len) {
  88                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  89         }
  90
  91         in_input_buffer.data = (uint8_t *)req->in.vector[i+2].iov_base;
  92         in_input_buffer.length = in_input_buffer_length;
  93
  94         if (in_input_buffer.length > req->sconn->smb2.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)req->sconn->smb2.max_trans));
  99                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
 100         }
 101         if (in_output_buffer_length > req->sconn->smb2.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                          req->sconn->smb2.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->sconn,
 157                                                          nt_errstr(error));
 158                         return;
 159                 }
 160                 return;
 161         }
 162
 163         if (!NT_STATUS_IS_OK(call_status)) {
 164                 /* Return a specific error with data. */
 165                 error = smbd_smb2_request_error_ex(req,
 166                                                 call_status,
 167                                                 &out_output_buffer,
 168                                                 __location__);
 169                 if (!NT_STATUS_IS_OK(error)) {
 170                         smbd_server_connection_terminate(req->sconn,
 171                                                          nt_errstr(error));
 172                         return;
 173                 }
 174                 return;
 175         }
 176
 177         out_output_buffer_offset = SMB2_HDR_BODY + 0x08;
 178
 179         outbody = data_blob_talloc(req->out.vector, NULL, 0x08);
 180         if (outbody.data == NULL) {
 181                 error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 182                 if (!NT_STATUS_IS_OK(error)) {
 183                         smbd_server_connection_terminate(req->sconn,
 184                                                          nt_errstr(error));
 185                         return;
 186                 }
 187                 return;
 188         }
 189
 190         SSVAL(outbody.data, 0x00, 0x08 + 1);    /* struct size */
 191         SSVAL(outbody.data, 0x02,
 192               out_output_buffer_offset);        /* output buffer offset */
 193         SIVAL(outbody.data, 0x04,
 194               out_output_buffer.length);        /* output buffer length */
 195
 196         outdyn = out_output_buffer;
 197
 198         error = smbd_smb2_request_done(req, outbody, &outdyn);
 199         if (!NT_STATUS_IS_OK(error)) {
 200                 smbd_server_connection_terminate(req->sconn,
 201                                                  nt_errstr(error));
 202                 return;
 203         }
 204 }
 205
 206 struct smbd_smb2_getinfo_state {
 207         struct smbd_smb2_request *smb2req;
 208         NTSTATUS status;
 209         DATA_BLOB out_output_buffer;
 210 };
 211
 212 static void smb2_ipc_getinfo(struct tevent_req *req,
 213                                 struct smbd_smb2_getinfo_state *state,
 214                                 struct tevent_context *ev,
 215                                 uint8_t in_info_type,
 216                                 uint8_t in_file_info_class)
 217 {
 218         /* We want to reply to SMB2_GETINFO_FILE
 219            with a class of SMB2_FILE_STANDARD_INFO as
 220            otherwise a Win7 client issues this request
 221            twice (2xroundtrips) if we return NOT_SUPPORTED.
 222            NB. We do the same for SMB1 in call_trans2qpipeinfo() */
 223
 224         if (in_info_type == 0x01 && /* SMB2_GETINFO_FILE */
 225                         in_file_info_class == 0x05) { /* SMB2_FILE_STANDARD_INFO */
 226                 state->out_output_buffer = data_blob_talloc(state,
 227                                                 NULL, 24);
 228                 if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 229                         return;
 230                 }
 231
 232                 memset(state->out_output_buffer.data,0,24);
 233                 SOFF_T(state->out_output_buffer.data,0,4096LL);
 234                 SIVAL(state->out_output_buffer.data,16,1);
 235                 SIVAL(state->out_output_buffer.data,20,1);
 236                 tevent_req_done(req);
 237         } else {
 238                 tevent_req_nterror(req, NT_STATUS_NOT_SUPPORTED);
 239         }
 240 }
 241
 242 static struct tevent_req *smbd_smb2_getinfo_send(TALLOC_CTX *mem_ctx,
 243                                                  struct tevent_context *ev,
 244                                                  struct smbd_smb2_request *smb2req,
 245                                                  struct files_struct *fsp,
 246                                                  uint8_t in_info_type,
 247                                                  uint8_t in_file_info_class,
 248                                                  uint32_t in_output_buffer_length,
 249                                                  DATA_BLOB in_input_buffer,
 250                                                  uint32_t in_additional_information,
 251                                                  uint32_t in_flags)
 252 {
 253         struct tevent_req *req;
 254         struct smbd_smb2_getinfo_state *state;
 255         struct smb_request *smbreq;
 256         connection_struct *conn = smb2req->tcon->compat_conn;
 257         NTSTATUS status;
 258
 259         req = tevent_req_create(mem_ctx, &state,
 260                                 struct smbd_smb2_getinfo_state);
 261         if (req == NULL) {
 262                 return NULL;
 263         }
 264         state->smb2req = smb2req;
 265         state->status = NT_STATUS_OK;
 266         state->out_output_buffer = data_blob_null;
 267
 268         DEBUG(10,("smbd_smb2_getinfo_send: %s - fnum[%d]\n",
 269                   fsp_str_dbg(fsp), fsp->fnum));
 270
 271         smbreq = smbd_smb2_fake_smb_request(smb2req);
 272         if (tevent_req_nomem(smbreq, req)) {
 273                 return tevent_req_post(req, ev);
 274         }
 275
 276         if (IS_IPC(conn)) {
 277                 smb2_ipc_getinfo(req, state, ev,
 278                         in_info_type, in_file_info_class);
 279                 return tevent_req_post(req, ev);
 280         }
 281
 282         switch (in_info_type) {
 283         case 0x01:/* SMB2_GETINFO_FILE */
 284         {
 285                 uint16_t file_info_level;
 286                 char *data = NULL;
 287                 unsigned int data_size = 0;
 288                 bool delete_pending = false;
 289                 struct timespec write_time_ts;
 290                 struct file_id fileid;
 291                 struct ea_list *ea_list = NULL;
 292                 int lock_data_count = 0;
 293                 char *lock_data = NULL;
 294
 295                 ZERO_STRUCT(write_time_ts);
 296
 297                 switch (in_file_info_class) {
 298                 case 0x0F:/* RAW_FILEINFO_SMB2_ALL_EAS */
 299                         file_info_level = 0xFF00 | in_file_info_class;
 300                         break;
 301
 302                 case 0x12:/* RAW_FILEINFO_SMB2_ALL_INFORMATION */
 303                         file_info_level = 0xFF00 | in_file_info_class;
 304                         break;
 305
 306                 default:
 307                         /* the levels directly map to the passthru levels */
 308                         file_info_level = in_file_info_class + 1000;
 309                         break;
 310                 }
 311
 312                 if (fsp->fake_file_handle) {
 313                         /*
 314                          * This is actually for the QUOTA_FAKE_FILE --metze
 315                          */
 316
 317                         /* We know this name is ok, it's already passed the checks. */
 318
 319                 } else if (fsp->fh->fd == -1) {
 320                         /*
 321                          * This is actually a QFILEINFO on a directory
 322                          * handle (returned from an NT SMB). NT5.0 seems
 323                          * to do this call. JRA.
 324                          */
 325
 326                         if (INFO_LEVEL_IS_UNIX(file_info_level)) {
 327                                 /* Always do lstat for UNIX calls. */
 328                                 if (SMB_VFS_LSTAT(conn, fsp->fsp_name)) {
 329                                         DEBUG(3,("smbd_smb2_getinfo_send: "
 330                                                  "SMB_VFS_LSTAT of %s failed "
 331                                                  "(%s)\n", fsp_str_dbg(fsp),
 332                                                  strerror(errno)));
 333                                         status = map_nt_error_from_unix(errno);
 334                                         tevent_req_nterror(req, status);
 335                                         return tevent_req_post(req, ev);
 336                                 }
 337                         } else if (SMB_VFS_STAT(conn, fsp->fsp_name)) {
 338                                 DEBUG(3,("smbd_smb2_getinfo_send: "
 339                                          "SMB_VFS_STAT of %s failed (%s)\n",
 340                                          fsp_str_dbg(fsp),
 341                                          strerror(errno)));
 342                                 status = map_nt_error_from_unix(errno);
 343                                 tevent_req_nterror(req, status);
 344                                 return tevent_req_post(req, ev);
 345                         }
 346
 347                         fileid = vfs_file_id_from_sbuf(conn,
 348                                                        &fsp->fsp_name->st);
 349                         get_file_infos(fileid, fsp->name_hash,
 350                                 &delete_pending, &write_time_ts);
 351                 } else {
 352                         /*
 353                          * Original code - this is an open file.
 354                          */
 355
 356                         if (SMB_VFS_FSTAT(fsp, &fsp->fsp_name->st) != 0) {
 357                                 DEBUG(3, ("smbd_smb2_getinfo_send: "
 358                                           "fstat of fnum %d failed (%s)\n",
 359                                           fsp->fnum, strerror(errno)));
 360                                 status = map_nt_error_from_unix(errno);
 361                                 tevent_req_nterror(req, status);
 362                                 return tevent_req_post(req, ev);
 363                         }
 364                         fileid = vfs_file_id_from_sbuf(conn,
 365                                                        &fsp->fsp_name->st);
 366                         get_file_infos(fileid, fsp->name_hash,
 367                                 &delete_pending, &write_time_ts);
 368                 }
 369
 370                 status = smbd_do_qfilepathinfo(conn, state,
 371                                                file_info_level,
 372                                                fsp,
 373                                                fsp->fsp_name,
 374                                                delete_pending,
 375                                                write_time_ts,
 376                                                ea_list,
 377                                                lock_data_count,
 378                                                lock_data,
 379                                                STR_UNICODE,
 380                                                in_output_buffer_length,
 381                                                &data,
 382                                                &data_size);
 383                 if (!NT_STATUS_IS_OK(status)) {
 384                         SAFE_FREE(data);
 385                         if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_LEVEL)) {
 386                                 status = NT_STATUS_INVALID_INFO_CLASS;
 387                         }
 388                         tevent_req_nterror(req, status);
 389                         return tevent_req_post(req, ev);
 390                 }
 391                 if (data_size > 0) {
 392                         state->out_output_buffer = data_blob_talloc(state,
 393                                                                     data,
 394                                                                     data_size);
 395                         SAFE_FREE(data);
 396                         if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 397                                 return tevent_req_post(req, ev);
 398                         }
 399                 }
 400                 SAFE_FREE(data);
 401                 break;
 402         }
 403
 404         case 0x02:/* SMB2_GETINFO_FS */
 405         {
 406                 uint16_t file_info_level;
 407                 char *data = NULL;
 408                 int data_size = 0;
 409
 410                 /* the levels directly map to the passthru levels */
 411                 file_info_level = in_file_info_class + 1000;
 412
 413                 status = smbd_do_qfsinfo(conn, state,
 414                                          file_info_level,
 415                                          STR_UNICODE,
 416                                          in_output_buffer_length,
 417                                          &data,
 418                                          &data_size);
 419                 if (!NT_STATUS_IS_OK(status)) {
 420                         SAFE_FREE(data);
 421                         if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_LEVEL)) {
 422                                 status = NT_STATUS_INVALID_INFO_CLASS;
 423                         }
 424                         tevent_req_nterror(req, status);
 425                         return tevent_req_post(req, ev);
 426                 }
 427                 if (data_size > 0) {
 428                         state->out_output_buffer = data_blob_talloc(state,
 429                                                                     data,
 430                                                                     data_size);
 431                         SAFE_FREE(data);
 432                         if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 433                                 return tevent_req_post(req, ev);
 434                         }
 435                 }
 436                 SAFE_FREE(data);
 437                 break;
 438         }
 439
 440         case 0x03:/* SMB2_GETINFO_SEC */
 441         {
 442                 uint8_t *p_marshalled_sd = NULL;
 443                 size_t sd_size = 0;
 444
 445                 status = smbd_do_query_security_desc(conn,
 446                                 state,
 447                                 fsp,
 448                                 /* Security info wanted. */
 449                                 in_additional_information,
 450                                 in_output_buffer_length,
 451                                 &p_marshalled_sd,
 452                                 &sd_size);
 453
 454                 if (NT_STATUS_EQUAL(status, NT_STATUS_BUFFER_TOO_SMALL)) {
 455                         /* Return needed size. */
 456                         state->out_output_buffer = data_blob_talloc(state,
 457                                                                     NULL,
 458                                                                     4);
 459                         if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 460                                 return tevent_req_post(req, ev);
 461                         }
 462                         SIVAL(state->out_output_buffer.data,0,(uint32_t)sd_size);
 463                         state->status = NT_STATUS_BUFFER_TOO_SMALL;
 464                         break;
 465                 }
 466                 if (!NT_STATUS_IS_OK(status)) {
 467                         DEBUG(10,("smbd_smb2_getinfo_send: "
 468                                  "smbd_do_query_security_desc of %s failed "
 469                                  "(%s)\n", fsp_str_dbg(fsp),
 470                                  nt_errstr(status)));
 471                         tevent_req_nterror(req, status);
 472                         return tevent_req_post(req, ev);
 473                 }
 474
 475                 if (sd_size > 0) {
 476                         state->out_output_buffer = data_blob_talloc(state,
 477                                                                     p_marshalled_sd,
 478                                                                     sd_size);
 479                         if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 480                                 return tevent_req_post(req, ev);
 481                         }
 482                 }
 483                 break;
 484         }
 485
 486         default:
 487                 DEBUG(10,("smbd_smb2_getinfo_send: "
 488                         "unknown in_info_type of %u "
 489                         " for file %s\n",
 490                         (unsigned int)in_info_type,
 491                         fsp_str_dbg(fsp) ));
 492
 493                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 494                 return tevent_req_post(req, ev);
 495         }
 496
 497         tevent_req_done(req);
 498         return tevent_req_post(req, ev);
 499 }
 500
 501 static NTSTATUS smbd_smb2_getinfo_recv(struct tevent_req *req,
 502                                        TALLOC_CTX *mem_ctx,
 503                                        DATA_BLOB *out_output_buffer,
 504                                        NTSTATUS *pstatus)
 505 {
 506         NTSTATUS status;
 507         struct smbd_smb2_getinfo_state *state = tevent_req_data(req,
 508                                                 struct smbd_smb2_getinfo_state);
 509
 510         if (tevent_req_is_nterror(req, &status)) {
 511                 tevent_req_received(req);
 512                 return status;
 513         }
 514
 515         *out_output_buffer = state->out_output_buffer;
 516         talloc_steal(mem_ctx, out_output_buffer->data);
 517         *pstatus = state->status;
 518
 519         tevent_req_received(req);
 520         return NT_STATUS_OK;
 521 }