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