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         uint8_t in_info_type;
  50         uint8_t in_file_info_class;
  51         uint32_t in_output_buffer_length;
  52         uint16_t in_input_buffer_offset;
  53         uint32_t in_input_buffer_length;
  54         DATA_BLOB in_input_buffer;
  55         uint32_t in_additional_information;
  56         uint32_t in_flags;
  57         uint64_t in_file_id_persistent;
  58         uint64_t in_file_id_volatile;
  59         struct files_struct *in_fsp;
  60         struct tevent_req *subreq;
  61
  62         status = smbd_smb2_request_verify_sizes(req, 0x29);
  63         if (!NT_STATUS_IS_OK(status)) {
  64                 return smbd_smb2_request_error(req, status);
  65         }
  66         inbody = SMBD_SMB2_IN_BODY_PTR(req);
  67
  68         in_info_type                    = CVAL(inbody, 0x02);
  69         in_file_info_class              = CVAL(inbody, 0x03);
  70         in_output_buffer_length         = IVAL(inbody, 0x04);
  71         in_input_buffer_offset          = SVAL(inbody, 0x08);
  72         /* 0x0A 2 bytes reserved */
  73         in_input_buffer_length          = IVAL(inbody, 0x0C);
  74         in_additional_information       = IVAL(inbody, 0x10);
  75         in_flags                        = IVAL(inbody, 0x14);
  76         in_file_id_persistent           = BVAL(inbody, 0x18);
  77         in_file_id_volatile             = BVAL(inbody, 0x20);
  78
  79         if (in_input_buffer_offset == 0 && in_input_buffer_length == 0) {
  80                 /* This is ok */
  81         } else if (in_input_buffer_offset !=
  82                    (SMB2_HDR_BODY + SMBD_SMB2_IN_BODY_LEN(req))) {
  83                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  84         }
  85
  86         if (in_input_buffer_length > SMBD_SMB2_IN_DYN_LEN(req)) {
  87                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  88         }
  89
  90         in_input_buffer.data = SMBD_SMB2_IN_DYN_PTR(req);
  91         in_input_buffer.length = in_input_buffer_length;
  92
  93         if (in_input_buffer.length > req->sconn->smb2.max_trans) {
  94                 DEBUG(2,("smbd_smb2_request_process_getinfo: "
  95                          "client ignored max trans: %s: 0x%08X: 0x%08X\n",
  96                          __location__, (unsigned)in_input_buffer.length,
  97                          (unsigned)req->sconn->smb2.max_trans));
  98                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  99         }
 100         if (in_output_buffer_length > req->sconn->smb2.max_trans) {
 101                 DEBUG(2,("smbd_smb2_request_process_getinfo: "
 102                          "client ignored max trans: %s: 0x%08X: 0x%08X\n",
 103                          __location__, in_output_buffer_length,
 104                          req->sconn->smb2.max_trans));
 105                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
 106         }
 107
 108         status = smbd_smb2_request_verify_creditcharge(req,
 109                         MAX(in_input_buffer.length,in_output_buffer_length));
 110         if (!NT_STATUS_IS_OK(status)) {
 111                 return smbd_smb2_request_error(req, status);
 112         }
 113
 114         in_fsp = file_fsp_smb2(req, in_file_id_persistent, in_file_id_volatile);
 115         if (in_fsp == NULL) {
 116                 return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
 117         }
 118
 119         subreq = smbd_smb2_getinfo_send(req, req->sconn->ev_ctx,
 120                                         req, in_fsp,
 121                                         in_info_type,
 122                                         in_file_info_class,
 123                                         in_output_buffer_length,
 124                                         in_input_buffer,
 125                                         in_additional_information,
 126                                         in_flags);
 127         if (subreq == NULL) {
 128                 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 129         }
 130         tevent_req_set_callback(subreq, smbd_smb2_request_getinfo_done, req);
 131
 132         return smbd_smb2_request_pending_queue(req, subreq, 500);
 133 }
 134
 135 static void smbd_smb2_request_getinfo_done(struct tevent_req *subreq)
 136 {
 137         struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
 138                                         struct smbd_smb2_request);
 139         DATA_BLOB outbody;
 140         DATA_BLOB outdyn;
 141         uint16_t out_output_buffer_offset;
 142         DATA_BLOB out_output_buffer = data_blob_null;
 143         NTSTATUS status;
 144         NTSTATUS call_status = NT_STATUS_OK;
 145         NTSTATUS error; /* transport error */
 146
 147         status = smbd_smb2_getinfo_recv(subreq,
 148                                         req,
 149                                         &out_output_buffer,
 150                                         &call_status);
 151         TALLOC_FREE(subreq);
 152         if (!NT_STATUS_IS_OK(status)) {
 153                 error = smbd_smb2_request_error(req, status);
 154                 if (!NT_STATUS_IS_OK(error)) {
 155                         smbd_server_connection_terminate(req->sconn,
 156                                                          nt_errstr(error));
 157                         return;
 158                 }
 159                 return;
 160         }
 161
 162         if (!NT_STATUS_IS_OK(call_status)) {
 163                 /* Return a specific error with data. */
 164                 error = smbd_smb2_request_error_ex(req,
 165                                                 call_status,
 166                                                 &out_output_buffer,
 167                                                 __location__);
 168                 if (!NT_STATUS_IS_OK(error)) {
 169                         smbd_server_connection_terminate(req->sconn,
 170                                                          nt_errstr(error));
 171                         return;
 172                 }
 173                 return;
 174         }
 175
 176         out_output_buffer_offset = SMB2_HDR_BODY + 0x08;
 177
 178         outbody = data_blob_talloc(req->out.vector, NULL, 0x08);
 179         if (outbody.data == NULL) {
 180                 error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 181                 if (!NT_STATUS_IS_OK(error)) {
 182                         smbd_server_connection_terminate(req->sconn,
 183                                                          nt_errstr(error));
 184                         return;
 185                 }
 186                 return;
 187         }
 188
 189         SSVAL(outbody.data, 0x00, 0x08 + 1);    /* struct size */
 190         SSVAL(outbody.data, 0x02,
 191               out_output_buffer_offset);        /* output buffer offset */
 192         SIVAL(outbody.data, 0x04,
 193               out_output_buffer.length);        /* output buffer length */
 194
 195         outdyn = out_output_buffer;
 196
 197         error = smbd_smb2_request_done(req, outbody, &outdyn);
 198         if (!NT_STATUS_IS_OK(error)) {
 199                 smbd_server_connection_terminate(req->sconn,
 200                                                  nt_errstr(error));
 201                 return;
 202         }
 203 }
 204
 205 struct smbd_smb2_getinfo_state {
 206         struct smbd_smb2_request *smb2req;
 207         NTSTATUS status;
 208         DATA_BLOB out_output_buffer;
 209 };
 210
 211 static void smb2_ipc_getinfo(struct tevent_req *req,
 212                                 struct smbd_smb2_getinfo_state *state,
 213                                 struct tevent_context *ev,
 214                                 uint8_t in_info_type,
 215                                 uint8_t in_file_info_class)
 216 {
 217         /* We want to reply to SMB2_GETINFO_FILE
 218            with a class of SMB2_FILE_STANDARD_INFO as
 219            otherwise a Win7 client issues this request
 220            twice (2xroundtrips) if we return NOT_SUPPORTED.
 221            NB. We do the same for SMB1 in call_trans2qpipeinfo() */
 222
 223         if (in_info_type == 0x01 && /* SMB2_GETINFO_FILE */
 224                         in_file_info_class == 0x05) { /* SMB2_FILE_STANDARD_INFO */
 225                 state->out_output_buffer = data_blob_talloc(state,
 226                                                 NULL, 24);
 227                 if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 228                         return;
 229                 }
 230
 231                 memset(state->out_output_buffer.data,0,24);
 232                 SOFF_T(state->out_output_buffer.data,0,4096LL);
 233                 SIVAL(state->out_output_buffer.data,16,1);
 234                 SIVAL(state->out_output_buffer.data,20,1);
 235                 tevent_req_done(req);
 236         } else {
 237                 tevent_req_nterror(req, NT_STATUS_NOT_SUPPORTED);
 238         }
 239 }
 240
 241 static struct tevent_req *smbd_smb2_getinfo_send(TALLOC_CTX *mem_ctx,
 242                                                  struct tevent_context *ev,
 243                                                  struct smbd_smb2_request *smb2req,
 244                                                  struct files_struct *fsp,
 245                                                  uint8_t in_info_type,
 246                                                  uint8_t in_file_info_class,
 247                                                  uint32_t in_output_buffer_length,
 248                                                  DATA_BLOB in_input_buffer,
 249                                                  uint32_t in_additional_information,
 250                                                  uint32_t in_flags)
 251 {
 252         struct tevent_req *req;
 253         struct smbd_smb2_getinfo_state *state;
 254         struct smb_request *smbreq;
 255         connection_struct *conn = smb2req->tcon->compat;
 256         NTSTATUS status;
 257
 258         req = tevent_req_create(mem_ctx, &state,
 259                                 struct smbd_smb2_getinfo_state);
 260         if (req == NULL) {
 261                 return NULL;
 262         }
 263         state->smb2req = smb2req;
 264         state->status = NT_STATUS_OK;
 265         state->out_output_buffer = data_blob_null;
 266
 267         DEBUG(10,("smbd_smb2_getinfo_send: %s - %s\n",
 268                   fsp_str_dbg(fsp), fsp_fnum_dbg(fsp)));
 269
 270         smbreq = smbd_smb2_fake_smb_request(smb2req);
 271         if (tevent_req_nomem(smbreq, req)) {
 272                 return tevent_req_post(req, ev);
 273         }
 274
 275         if (IS_IPC(conn)) {
 276                 smb2_ipc_getinfo(req, state, ev,
 277                         in_info_type, in_file_info_class);
 278                 return tevent_req_post(req, ev);
 279         }
 280
 281         switch (in_info_type) {
 282         case 0x01:/* SMB2_GETINFO_FILE */
 283         {
 284                 uint16_t file_info_level;
 285                 char *data = NULL;
 286                 unsigned int data_size = 0;
 287                 bool delete_pending = false;
 288                 struct timespec write_time_ts;
 289                 struct file_id fileid;
 290                 struct ea_list *ea_list = NULL;
 291                 int lock_data_count = 0;
 292                 char *lock_data = NULL;
 293
 294                 ZERO_STRUCT(write_time_ts);
 295
 296                 switch (in_file_info_class) {
 297                 case 0x0F:/* RAW_FILEINFO_SMB2_ALL_EAS */
 298                         file_info_level = 0xFF00 | in_file_info_class;
 299                         break;
 300
 301                 case 0x12:/* RAW_FILEINFO_SMB2_ALL_INFORMATION */
 302                         file_info_level = 0xFF00 | in_file_info_class;
 303                         break;
 304
 305                 default:
 306                         /* the levels directly map to the passthru levels */
 307                         file_info_level = in_file_info_class + 1000;
 308                         break;
 309                 }
 310
 311                 if (fsp->fake_file_handle) {
 312                         /*
 313                          * This is actually for the QUOTA_FAKE_FILE --metze
 314                          */
 315
 316                         /* We know this name is ok, it's already passed the checks. */
 317
 318                 } else if (fsp->fh->fd == -1) {
 319                         /*
 320                          * This is actually a QFILEINFO on a directory
 321                          * handle (returned from an NT SMB). NT5.0 seems
 322                          * to do this call. JRA.
 323                          */
 324
 325                         if (INFO_LEVEL_IS_UNIX(file_info_level)) {
 326                                 /* Always do lstat for UNIX calls. */
 327                                 if (SMB_VFS_LSTAT(conn, fsp->fsp_name)) {
 328                                         DEBUG(3,("smbd_smb2_getinfo_send: "
 329                                                  "SMB_VFS_LSTAT of %s failed "
 330                                                  "(%s)\n", fsp_str_dbg(fsp),
 331                                                  strerror(errno)));
 332                                         status = map_nt_error_from_unix(errno);
 333                                         tevent_req_nterror(req, status);
 334                                         return tevent_req_post(req, ev);
 335                                 }
 336                         } else if (SMB_VFS_STAT(conn, fsp->fsp_name)) {
 337                                 DEBUG(3,("smbd_smb2_getinfo_send: "
 338                                          "SMB_VFS_STAT of %s failed (%s)\n",
 339                                          fsp_str_dbg(fsp),
 340                                          strerror(errno)));
 341                                 status = map_nt_error_from_unix(errno);
 342                                 tevent_req_nterror(req, status);
 343                                 return tevent_req_post(req, ev);
 344                         }
 345
 346                         fileid = vfs_file_id_from_sbuf(conn,
 347                                                        &fsp->fsp_name->st);
 348                         get_file_infos(fileid, fsp->name_hash,
 349                                 &delete_pending, &write_time_ts);
 350                 } else {
 351                         /*
 352                          * Original code - this is an open file.
 353                          */
 354
 355                         if (SMB_VFS_FSTAT(fsp, &fsp->fsp_name->st) != 0) {
 356                                 DEBUG(3, ("smbd_smb2_getinfo_send: "
 357                                           "fstat of %s failed (%s)\n",
 358                                           fsp_fnum_dbg(fsp), strerror(errno)));
 359                                 status = map_nt_error_from_unix(errno);
 360                                 tevent_req_nterror(req, status);
 361                                 return tevent_req_post(req, ev);
 362                         }
 363                         fileid = vfs_file_id_from_sbuf(conn,
 364                                                        &fsp->fsp_name->st);
 365                         get_file_infos(fileid, fsp->name_hash,
 366                                 &delete_pending, &write_time_ts);
 367                 }
 368
 369                 status = smbd_do_qfilepathinfo(conn, state,
 370                                                file_info_level,
 371                                                fsp,
 372                                                fsp->fsp_name,
 373                                                delete_pending,
 374                                                write_time_ts,
 375                                                ea_list,
 376                                                lock_data_count,
 377                                                lock_data,
 378                                                STR_UNICODE,
 379                                                in_output_buffer_length,
 380                                                &data,
 381                                                &data_size);
 382                 if (!NT_STATUS_IS_OK(status)) {
 383                         SAFE_FREE(data);
 384                         if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_LEVEL)) {
 385                                 status = NT_STATUS_INVALID_INFO_CLASS;
 386                         }
 387                         tevent_req_nterror(req, status);
 388                         return tevent_req_post(req, ev);
 389                 }
 390                 if (data_size > 0) {
 391                         state->out_output_buffer = data_blob_talloc(state,
 392                                                                     data,
 393                                                                     data_size);
 394                         SAFE_FREE(data);
 395                         if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 396                                 return tevent_req_post(req, ev);
 397                         }
 398                 }
 399                 SAFE_FREE(data);
 400                 break;
 401         }
 402
 403         case 0x02:/* SMB2_GETINFO_FS */
 404         {
 405                 uint16_t file_info_level;
 406                 char *data = NULL;
 407                 int data_size = 0;
 408
 409                 /* the levels directly map to the passthru levels */
 410                 file_info_level = in_file_info_class + 1000;
 411
 412                 status = smbd_do_qfsinfo(conn, state,
 413                                          file_info_level,
 414                                          STR_UNICODE,
 415                                          in_output_buffer_length,
 416                                          &data,
 417                                          &data_size);
 418                 if (!NT_STATUS_IS_OK(status)) {
 419                         SAFE_FREE(data);
 420                         if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_LEVEL)) {
 421                                 status = NT_STATUS_INVALID_INFO_CLASS;
 422                         }
 423                         tevent_req_nterror(req, status);
 424                         return tevent_req_post(req, ev);
 425                 }
 426                 if (data_size > 0) {
 427                         state->out_output_buffer = data_blob_talloc(state,
 428                                                                     data,
 429                                                                     data_size);
 430                         SAFE_FREE(data);
 431                         if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 432                                 return tevent_req_post(req, ev);
 433                         }
 434                 }
 435                 SAFE_FREE(data);
 436                 break;
 437         }
 438
 439         case 0x03:/* SMB2_GETINFO_SEC */
 440         {
 441                 uint8_t *p_marshalled_sd = NULL;
 442                 size_t sd_size = 0;
 443
 444                 status = smbd_do_query_security_desc(conn,
 445                                 state,
 446                                 fsp,
 447                                 /* Security info wanted. */
 448                                 in_additional_information,
 449                                 in_output_buffer_length,
 450                                 &p_marshalled_sd,
 451                                 &sd_size);
 452
 453                 if (NT_STATUS_EQUAL(status, NT_STATUS_BUFFER_TOO_SMALL)) {
 454                         /* Return needed size. */
 455                         state->out_output_buffer = data_blob_talloc(state,
 456                                                                     NULL,
 457                                                                     4);
 458                         if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 459                                 return tevent_req_post(req, ev);
 460                         }
 461                         SIVAL(state->out_output_buffer.data,0,(uint32_t)sd_size);
 462                         state->status = NT_STATUS_BUFFER_TOO_SMALL;
 463                         break;
 464                 }
 465                 if (!NT_STATUS_IS_OK(status)) {
 466                         DEBUG(10,("smbd_smb2_getinfo_send: "
 467                                  "smbd_do_query_security_desc of %s failed "
 468                                  "(%s)\n", fsp_str_dbg(fsp),
 469                                  nt_errstr(status)));
 470                         tevent_req_nterror(req, status);
 471                         return tevent_req_post(req, ev);
 472                 }
 473
 474                 if (sd_size > 0) {
 475                         state->out_output_buffer = data_blob_talloc(state,
 476                                                                     p_marshalled_sd,
 477                                                                     sd_size);
 478                         if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 479                                 return tevent_req_post(req, ev);
 480                         }
 481                 }
 482                 break;
 483         }
 484
 485         default:
 486                 DEBUG(10,("smbd_smb2_getinfo_send: "
 487                         "unknown in_info_type of %u "
 488                         " for file %s\n",
 489                         (unsigned int)in_info_type,
 490                         fsp_str_dbg(fsp) ));
 491
 492                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 493                 return tevent_req_post(req, ev);
 494         }
 495
 496         tevent_req_done(req);
 497         return tevent_req_post(req, ev);
 498 }
 499
 500 static NTSTATUS smbd_smb2_getinfo_recv(struct tevent_req *req,
 501                                        TALLOC_CTX *mem_ctx,
 502                                        DATA_BLOB *out_output_buffer,
 503                                        NTSTATUS *pstatus)
 504 {
 505         NTSTATUS status;
 506         struct smbd_smb2_getinfo_state *state = tevent_req_data(req,
 507                                                 struct smbd_smb2_getinfo_state);
 508
 509         if (tevent_req_is_nterror(req, &status)) {
 510                 tevent_req_received(req);
 511                 return status;
 512         }
 513
 514         *out_output_buffer = state->out_output_buffer;
 515         talloc_steal(mem_ctx, out_output_buffer->data);
 516         *pstatus = state->status;
 517
 518         tevent_req_received(req);
 519         return NT_STATUS_OK;
 520 }