source3/smbd/smb2_create.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Core SMB2 server
   4
   5    Copyright (C) Stefan Metzmacher 2009
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "includes.h"
  22 #include "smbd/globals.h"
  23 #include "../libcli/smb/smb_common.h"
  24
  25 static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
  26                         struct tevent_context *ev,
  27                         struct smbd_smb2_request *smb2req,
  28                         uint8_t in_oplock_level,
  29                         uint32_t in_impersonation_level,
  30                         uint32_t in_desired_access,
  31                         uint32_t in_file_attributes,
  32                         uint32_t in_share_access,
  33                         uint32_t in_create_disposition,
  34                         uint32_t in_create_options,
  35                         const char *in_name,
  36                         struct smb2_create_blobs in_context_blobs);
  37 static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
  38                         TALLOC_CTX *mem_ctx,
  39                         uint8_t *out_oplock_level,
  40                         uint32_t *out_create_action,
  41                         NTTIME *out_creation_time,
  42                         NTTIME *out_last_access_time,
  43                         NTTIME *out_last_write_time,
  44                         NTTIME *out_change_time,
  45                         uint64_t *out_allocation_size,
  46                         uint64_t *out_end_of_file,
  47                         uint32_t *out_file_attributes,
  48                         uint64_t *out_file_id_volatile,
  49                         struct smb2_create_blobs *out_context_blobs);
  50
  51 static void smbd_smb2_request_create_done(struct tevent_req *tsubreq);
  52 NTSTATUS smbd_smb2_request_process_create(struct smbd_smb2_request *smb2req)
  53 {
  54         const uint8_t *inbody;
  55         int i = smb2req->current_idx;
  56         size_t expected_body_size = 0x39;
  57         size_t body_size;
  58         uint8_t in_oplock_level;
  59         uint32_t in_impersonation_level;
  60         uint32_t in_desired_access;
  61         uint32_t in_file_attributes;
  62         uint32_t in_share_access;
  63         uint32_t in_create_disposition;
  64         uint32_t in_create_options;
  65         uint16_t in_name_offset;
  66         uint16_t in_name_length;
  67         DATA_BLOB in_name_buffer;
  68         char *in_name_string;
  69         size_t in_name_string_size;
  70         uint32_t name_offset = 0;
  71         uint32_t name_available_length = 0;
  72         uint32_t in_context_offset;
  73         uint32_t in_context_length;
  74         DATA_BLOB in_context_buffer;
  75         struct smb2_create_blobs in_context_blobs;
  76         uint32_t context_offset = 0;
  77         uint32_t context_available_length = 0;
  78         uint32_t dyn_offset;
  79         NTSTATUS status;
  80         bool ok;
  81         struct tevent_req *tsubreq;
  82
  83         if (smb2req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
  84                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
  85         }
  86
  87         inbody = (const uint8_t *)smb2req->in.vector[i+1].iov_base;
  88
  89         body_size = SVAL(inbody, 0x00);
  90         if (body_size != expected_body_size) {
  91                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
  92         }
  93
  94         in_oplock_level         = CVAL(inbody, 0x03);
  95         in_impersonation_level  = IVAL(inbody, 0x04);
  96         in_desired_access       = IVAL(inbody, 0x18);
  97         in_file_attributes      = IVAL(inbody, 0x1C);
  98         in_share_access         = IVAL(inbody, 0x20);
  99         in_create_disposition   = IVAL(inbody, 0x24);
 100         in_create_options       = IVAL(inbody, 0x28);
 101         in_name_offset          = SVAL(inbody, 0x2C);
 102         in_name_length          = SVAL(inbody, 0x2E);
 103         in_context_offset       = IVAL(inbody, 0x30);
 104         in_context_length       = IVAL(inbody, 0x34);
 105
 106         /*
 107          * First check if the dynamic name and context buffers
 108          * are correctly specified.
 109          *
 110          * Note: That we don't check if the name and context buffers
 111          *       overlap
 112          */
 113
 114         dyn_offset = SMB2_HDR_BODY + (body_size & 0xFFFFFFFE);
 115
 116         if (in_name_offset == 0 && in_name_length == 0) {
 117                 /* This is ok */
 118                 name_offset = 0;
 119         } else if (in_name_offset < dyn_offset) {
 120                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 121         } else {
 122                 name_offset = in_name_offset - dyn_offset;
 123         }
 124
 125         if (name_offset > smb2req->in.vector[i+2].iov_len) {
 126                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 127         }
 128
 129         name_available_length = smb2req->in.vector[i+2].iov_len - name_offset;
 130
 131         if (in_name_length > name_available_length) {
 132                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 133         }
 134
 135         in_name_buffer.data = (uint8_t *)smb2req->in.vector[i+2].iov_base +
 136                               name_offset;
 137         in_name_buffer.length = in_name_length;
 138
 139         if (in_context_offset == 0 && in_context_length == 0) {
 140                 /* This is ok */
 141                 context_offset = 0;
 142         } else if (in_context_offset < dyn_offset) {
 143                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 144         } else {
 145                 context_offset = in_context_offset - dyn_offset;
 146         }
 147
 148         if (context_offset > smb2req->in.vector[i+2].iov_len) {
 149                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 150         }
 151
 152         context_available_length = smb2req->in.vector[i+2].iov_len - context_offset;
 153
 154         if (in_context_length > context_available_length) {
 155                 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
 156         }
 157
 158         in_context_buffer.data = (uint8_t *)smb2req->in.vector[i+2].iov_base +
 159                                   context_offset;
 160         in_context_buffer.length = in_context_length;
 161
 162         /*
 163          * Now interpret the name and context buffers
 164          */
 165
 166         ok = convert_string_talloc(smb2req, CH_UTF16, CH_UNIX,
 167                                    in_name_buffer.data,
 168                                    in_name_buffer.length,
 169                                    &in_name_string,
 170                                    &in_name_string_size, false);
 171         if (!ok) {
 172                 return smbd_smb2_request_error(smb2req, NT_STATUS_ILLEGAL_CHARACTER);
 173         }
 174
 175         ZERO_STRUCT(in_context_blobs);
 176         status = smb2_create_blob_parse(smb2req, in_context_buffer, &in_context_blobs);
 177         if (!NT_STATUS_IS_OK(status)) {
 178                 return smbd_smb2_request_error(smb2req, status);
 179         }
 180
 181         tsubreq = smbd_smb2_create_send(smb2req,
 182                                        smb2req->sconn->smb2.event_ctx,
 183                                        smb2req,
 184                                        in_oplock_level,
 185                                        in_impersonation_level,
 186                                        in_desired_access,
 187                                        in_file_attributes,
 188                                        in_share_access,
 189                                        in_create_disposition,
 190                                        in_create_options,
 191                                        in_name_string,
 192                                        in_context_blobs);
 193         if (tsubreq == NULL) {
 194                 smb2req->subreq = NULL;
 195                 return smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
 196         }
 197         tevent_req_set_callback(tsubreq, smbd_smb2_request_create_done, smb2req);
 198
 199         return smbd_smb2_request_pending_queue(smb2req, tsubreq);
 200 }
 201
 202 static uint64_t get_mid_from_smb2req(struct smbd_smb2_request *smb2req)
 203 {
 204         uint8_t *reqhdr = (uint8_t *)smb2req->out.vector[smb2req->current_idx].iov_base;
 205         return BVAL(reqhdr, SMB2_HDR_MESSAGE_ID);
 206 }
 207
 208 static void smbd_smb2_request_create_done(struct tevent_req *tsubreq)
 209 {
 210         struct smbd_smb2_request *smb2req = tevent_req_callback_data(tsubreq,
 211                                         struct smbd_smb2_request);
 212         int i = smb2req->current_idx;
 213         uint8_t *outhdr;
 214         DATA_BLOB outbody;
 215         DATA_BLOB outdyn;
 216         uint8_t out_oplock_level = 0;
 217         uint32_t out_create_action = 0;
 218         NTTIME out_creation_time = 0;
 219         NTTIME out_last_access_time = 0;
 220         NTTIME out_last_write_time = 0;
 221         NTTIME out_change_time = 0;
 222         uint64_t out_allocation_size = 0;
 223         uint64_t out_end_of_file = 0;
 224         uint32_t out_file_attributes = 0;
 225         uint64_t out_file_id_volatile = 0;
 226         struct smb2_create_blobs out_context_blobs;
 227         DATA_BLOB out_context_buffer;
 228         uint16_t out_context_buffer_offset = 0;
 229         NTSTATUS status;
 230         NTSTATUS error; /* transport error */
 231
 232         if (smb2req->cancelled) {
 233                 uint64_t mid = get_mid_from_smb2req(smb2req);
 234                 DEBUG(10,("smbd_smb2_request_create_done: cancelled mid %llu\n",
 235                         (unsigned long long)mid ));
 236                 error = smbd_smb2_request_error(smb2req, NT_STATUS_CANCELLED);
 237                 if (!NT_STATUS_IS_OK(error)) {
 238                         smbd_server_connection_terminate(smb2req->sconn,
 239                                 nt_errstr(error));
 240                         return;
 241                 }
 242                 return;
 243         }
 244
 245         status = smbd_smb2_create_recv(tsubreq,
 246                                        smb2req,
 247                                        &out_oplock_level,
 248                                        &out_create_action,
 249                                        &out_creation_time,
 250                                        &out_last_access_time,
 251                                        &out_last_write_time,
 252                                        &out_change_time,
 253                                        &out_allocation_size,
 254                                        &out_end_of_file,
 255                                        &out_file_attributes,
 256                                        &out_file_id_volatile,
 257                                        &out_context_blobs);
 258         if (!NT_STATUS_IS_OK(status)) {
 259                 error = smbd_smb2_request_error(smb2req, status);
 260                 if (!NT_STATUS_IS_OK(error)) {
 261                         smbd_server_connection_terminate(smb2req->sconn,
 262                                                          nt_errstr(error));
 263                         return;
 264                 }
 265                 return;
 266         }
 267
 268         status = smb2_create_blob_push(smb2req, &out_context_buffer, out_context_blobs);
 269         if (!NT_STATUS_IS_OK(status)) {
 270                 error = smbd_smb2_request_error(smb2req, status);
 271                 if (!NT_STATUS_IS_OK(error)) {
 272                         smbd_server_connection_terminate(smb2req->sconn,
 273                                                          nt_errstr(error));
 274                         return;
 275                 }
 276                 return;
 277         }
 278
 279         if (out_context_buffer.length > 0) {
 280                 out_context_buffer_offset = SMB2_HDR_BODY + 0x58;
 281         }
 282
 283         outhdr = (uint8_t *)smb2req->out.vector[i].iov_base;
 284
 285         outbody = data_blob_talloc(smb2req->out.vector, NULL, 0x58);
 286         if (outbody.data == NULL) {
 287                 error = smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
 288                 if (!NT_STATUS_IS_OK(error)) {
 289                         smbd_server_connection_terminate(smb2req->sconn,
 290                                                          nt_errstr(error));
 291                         return;
 292                 }
 293                 return;
 294         }
 295
 296         SSVAL(outbody.data, 0x00, 0x58 + 1);    /* struct size */
 297         SCVAL(outbody.data, 0x02,
 298               out_oplock_level);                /* oplock level */
 299         SCVAL(outbody.data, 0x03, 0);           /* reserved */
 300         SIVAL(outbody.data, 0x04,
 301               out_create_action);               /* create action */
 302         SBVAL(outbody.data, 0x08,
 303               out_creation_time);               /* creation time */
 304         SBVAL(outbody.data, 0x10,
 305               out_last_access_time);            /* last access time */
 306         SBVAL(outbody.data, 0x18,
 307               out_last_write_time);             /* last write time */
 308         SBVAL(outbody.data, 0x20,
 309               out_change_time);                 /* change time */
 310         SBVAL(outbody.data, 0x28,
 311               out_allocation_size);             /* allocation size */
 312         SBVAL(outbody.data, 0x30,
 313               out_end_of_file);                 /* end of file */
 314         SIVAL(outbody.data, 0x38,
 315               out_file_attributes);             /* file attributes */
 316         SIVAL(outbody.data, 0x3C, 0);           /* reserved */
 317         SBVAL(outbody.data, 0x40, 0);           /* file id (persistent) */
 318         SBVAL(outbody.data, 0x48,
 319               out_file_id_volatile);            /* file id (volatile) */
 320         SIVAL(outbody.data, 0x50,
 321               out_context_buffer_offset);       /* create contexts offset */
 322         SIVAL(outbody.data, 0x54,
 323               out_context_buffer.length);       /* create contexts length */
 324
 325         outdyn = out_context_buffer;
 326
 327         error = smbd_smb2_request_done(smb2req, outbody, &outdyn);
 328         if (!NT_STATUS_IS_OK(error)) {
 329                 smbd_server_connection_terminate(smb2req->sconn,
 330                                                  nt_errstr(error));
 331                 return;
 332         }
 333 }
 334
 335 struct smbd_smb2_create_state {
 336         struct smbd_smb2_request *smb2req;
 337         struct smb_request *smb1req;
 338         struct timed_event *te;
 339         struct timeval request_time;
 340         struct file_id id;
 341         DATA_BLOB private_data;
 342         uint8_t out_oplock_level;
 343         uint32_t out_create_action;
 344         NTTIME out_creation_time;
 345         NTTIME out_last_access_time;
 346         NTTIME out_last_write_time;
 347         NTTIME out_change_time;
 348         uint64_t out_allocation_size;
 349         uint64_t out_end_of_file;
 350         uint32_t out_file_attributes;
 351         uint64_t out_file_id_volatile;
 352         struct smb2_create_blobs out_context_blobs;
 353 };
 354
 355 static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
 356                         struct tevent_context *ev,
 357                         struct smbd_smb2_request *smb2req,
 358                         uint8_t in_oplock_level,
 359                         uint32_t in_impersonation_level,
 360                         uint32_t in_desired_access,
 361                         uint32_t in_file_attributes,
 362                         uint32_t in_share_access,
 363                         uint32_t in_create_disposition,
 364                         uint32_t in_create_options,
 365                         const char *in_name,
 366                         struct smb2_create_blobs in_context_blobs)
 367 {
 368         struct tevent_req *req = NULL;
 369         struct smbd_smb2_create_state *state = NULL;
 370         NTSTATUS status;
 371         struct smb_request *smb1req = NULL;
 372         files_struct *result = NULL;
 373         int info;
 374         struct timespec write_time_ts;
 375         struct smb2_create_blobs out_context_blobs;
 376
 377         ZERO_STRUCT(out_context_blobs);
 378
 379         if (!smb2req->async) {
 380                 /* New create call. */
 381                 req = tevent_req_create(mem_ctx, &state,
 382                                 struct smbd_smb2_create_state);
 383                 if (req == NULL) {
 384                         return NULL;
 385                 }
 386                 state->smb2req = smb2req;
 387                 smb2req->subreq = req; /* So we can find this when going async. */
 388
 389                 smb1req = smbd_smb2_fake_smb_request(smb2req);
 390                 if (tevent_req_nomem(smb1req, req)) {
 391                         return tevent_req_post(req, ev);
 392                 }
 393                 state->smb1req = smb1req;
 394                 DEBUG(10,("smbd_smb2_create: name[%s]\n",
 395                         in_name));
 396         } else {
 397                 /* Re-entrant create call. */
 398                 req = smb2req->subreq;
 399                 state = tevent_req_data(req,
 400                                 struct smbd_smb2_create_state);
 401                 smb1req = state->smb1req;
 402                 DEBUG(10,("smbd_smb2_create_send: reentrant for file %s\n",
 403                         in_name ));
 404         }
 405
 406         if (IS_IPC(smb1req->conn)) {
 407                 const char *pipe_name = in_name;
 408
 409                 if (!lp_nt_pipe_support()) {
 410                         tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
 411                         return tevent_req_post(req, ev);
 412                 }
 413
 414                 /* Strip \\ off the name. */
 415                 if (pipe_name[0] == '\\') {
 416                         pipe_name++;
 417                 }
 418
 419                 status = open_np_file(smb1req, pipe_name, &result);
 420                 if (!NT_STATUS_IS_OK(status)) {
 421                         tevent_req_nterror(req, status);
 422                         return tevent_req_post(req, ev);
 423                 }
 424                 info = FILE_WAS_OPENED;
 425         } else if (CAN_PRINT(smb1req->conn)) {
 426                 status = file_new(smb1req, smb1req->conn, &result);
 427                 if(!NT_STATUS_IS_OK(status)) {
 428                         tevent_req_nterror(req, status);
 429                         return tevent_req_post(req, ev);
 430                 }
 431
 432                 status = print_fsp_open(smb1req,
 433                                         smb1req->conn,
 434                                         in_name,
 435                                         smb1req->vuid,
 436                                         result);
 437                 if (!NT_STATUS_IS_OK(status)) {
 438                         file_free(smb1req, result);
 439                         tevent_req_nterror(req, status);
 440                         return tevent_req_post(req, ev);
 441                 }
 442                 info = FILE_WAS_CREATED;
 443         } else {
 444                 char *fname;
 445                 struct smb_filename *smb_fname = NULL;
 446                 struct smb2_create_blob *exta = NULL;
 447                 struct ea_list *ea_list = NULL;
 448                 struct smb2_create_blob *mxac = NULL;
 449                 NTTIME max_access_time = 0;
 450                 struct smb2_create_blob *secd = NULL;
 451                 struct security_descriptor *sec_desc = NULL;
 452                 struct smb2_create_blob *dhnq = NULL;
 453                 struct smb2_create_blob *dhnc = NULL;
 454                 struct smb2_create_blob *alsi = NULL;
 455                 uint64_t allocation_size = 0;
 456                 struct smb2_create_blob *twrp = NULL;
 457                 struct smb2_create_blob *qfid = NULL;
 458
 459                 exta = smb2_create_blob_find(&in_context_blobs,
 460                                              SMB2_CREATE_TAG_EXTA);
 461                 mxac = smb2_create_blob_find(&in_context_blobs,
 462                                              SMB2_CREATE_TAG_MXAC);
 463                 secd = smb2_create_blob_find(&in_context_blobs,
 464                                              SMB2_CREATE_TAG_SECD);
 465                 dhnq = smb2_create_blob_find(&in_context_blobs,
 466                                              SMB2_CREATE_TAG_DHNQ);
 467                 dhnc = smb2_create_blob_find(&in_context_blobs,
 468                                              SMB2_CREATE_TAG_DHNC);
 469                 alsi = smb2_create_blob_find(&in_context_blobs,
 470                                              SMB2_CREATE_TAG_ALSI);
 471                 twrp = smb2_create_blob_find(&in_context_blobs,
 472                                              SMB2_CREATE_TAG_TWRP);
 473                 qfid = smb2_create_blob_find(&in_context_blobs,
 474                                              SMB2_CREATE_TAG_QFID);
 475
 476                 fname = talloc_strdup(state, in_name);
 477                 if (tevent_req_nomem(fname, req)) {
 478                         return tevent_req_post(req, ev);
 479                 }
 480
 481                 if (exta) {
 482                         if (dhnc) {
 483                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 484                                 return tevent_req_post(req, ev);
 485                         }
 486
 487                         ea_list = read_nttrans_ea_list(mem_ctx,
 488                                 (const char *)exta->data.data, exta->data.length);
 489                         if (!ea_list) {
 490                                 DEBUG(10,("smbd_smb2_create_send: read_ea_name_list failed.\n"));
 491                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 492                                 return tevent_req_post(req, ev);
 493                         }
 494                 }
 495
 496                 if (mxac) {
 497                         if (dhnc) {
 498                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 499                                 return tevent_req_post(req, ev);
 500                         }
 501
 502                         if (mxac->data.length == 0) {
 503                                 max_access_time = 0;
 504                         } else if (mxac->data.length == 8) {
 505                                 max_access_time = BVAL(mxac->data.data, 0);
 506                         } else {
 507                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 508                                 return tevent_req_post(req, ev);
 509                         }
 510                 }
 511
 512                 if (secd) {
 513                         enum ndr_err_code ndr_err;
 514
 515                         if (dhnc) {
 516                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 517                                 return tevent_req_post(req, ev);
 518                         }
 519
 520                         sec_desc = talloc_zero(state, struct security_descriptor);
 521                         if (tevent_req_nomem(sec_desc, req)) {
 522                                 return tevent_req_post(req, ev);
 523                         }
 524
 525                         ndr_err = ndr_pull_struct_blob(&secd->data,
 526                                 sec_desc, NULL, sec_desc,
 527                                 (ndr_pull_flags_fn_t)ndr_pull_security_descriptor);
 528                         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 529                                 DEBUG(2,("ndr_pull_security_descriptor failed: %s\n",
 530                                          ndr_errstr(ndr_err)));
 531                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 532                                 return tevent_req_post(req, ev);
 533                         }
 534                 }
 535
 536                 if (dhnq) {
 537                         if (dhnc) {
 538                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 539                                 return tevent_req_post(req, ev);
 540                         }
 541
 542                         if (dhnq->data.length != 16) {
 543                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 544                                 return tevent_req_post(req, ev);
 545                         }
 546                         /*
 547                          * we don't support durable handles yet
 548                          * and have to ignore this
 549                          */
 550                 }
 551
 552                 if (dhnc) {
 553                         if (dhnc->data.length != 16) {
 554                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 555                                 return tevent_req_post(req, ev);
 556                         }
 557                         /* we don't support durable handles yet */
 558                         tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
 559                         return tevent_req_post(req, ev);
 560                 }
 561
 562                 if (alsi) {
 563                         if (dhnc) {
 564                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 565                                 return tevent_req_post(req, ev);
 566                         }
 567
 568                         if (alsi->data.length != 8) {
 569                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 570                                 return tevent_req_post(req, ev);
 571                         }
 572                         allocation_size = BVAL(alsi->data.data, 0);
 573                 }
 574
 575                 if (twrp) {
 576                         NTTIME nttime;
 577                         time_t t;
 578                         struct tm *tm;
 579
 580                         if (dhnc) {
 581                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 582                                 return tevent_req_post(req, ev);
 583                         }
 584
 585                         if (twrp->data.length != 8) {
 586                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 587                                 return tevent_req_post(req, ev);
 588                         }
 589
 590                         nttime = BVAL(twrp->data.data, 0);
 591                         t = nt_time_to_unix(nttime);
 592                         tm = gmtime(&t);
 593
 594                         TALLOC_FREE(fname);
 595                         fname = talloc_asprintf(state,
 596                                         "@GMT-%04u.%02u.%02u-%02u.%02u.%02u\\%s",
 597                                         tm->tm_year + 1900,
 598                                         tm->tm_mon + 1,
 599                                         tm->tm_mday,
 600                                         tm->tm_hour,
 601                                         tm->tm_min,
 602                                         tm->tm_sec,
 603                                         in_name);
 604                         if (tevent_req_nomem(fname, req)) {
 605                                 return tevent_req_post(req, ev);
 606                         }
 607                 }
 608
 609                 if (qfid) {
 610                         if (qfid->data.length != 0) {
 611                                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 612                                 return tevent_req_post(req, ev);
 613                         }
 614                 }
 615
 616                 /* these are ignored for SMB2 */
 617                 in_create_options &= ~(0x10);/* NTCREATEX_OPTIONS_SYNC_ALERT */
 618                 in_create_options &= ~(0x20);/* NTCREATEX_OPTIONS_ASYNC_ALERT */
 619
 620                 /* convert '\\' into '/' */
 621                 status = check_path_syntax(fname);
 622                 if (!NT_STATUS_IS_OK(status)) {
 623                         tevent_req_nterror(req, status);
 624                         return tevent_req_post(req, ev);
 625                 }
 626
 627                 status = filename_convert(req,
 628                                           smb1req->conn,
 629                                           smb1req->flags2 & FLAGS2_DFS_PATHNAMES,
 630                                           fname,
 631                                           0,
 632                                           NULL,
 633                                           &smb_fname);
 634                 if (!NT_STATUS_IS_OK(status)) {
 635                         tevent_req_nterror(req, status);
 636                         return tevent_req_post(req, ev);
 637                 }
 638
 639                 status = SMB_VFS_CREATE_FILE(smb1req->conn,
 640                                              smb1req,
 641                                              0, /* root_dir_fid */
 642                                              smb_fname,
 643                                              in_desired_access,
 644                                              in_share_access,
 645                                              in_create_disposition,
 646                                              in_create_options,
 647                                              in_file_attributes,
 648                                              0, /* oplock_request */
 649                                              allocation_size,
 650                                              0, /* private_flags */
 651                                              sec_desc,
 652                                              ea_list,
 653                                              &result,
 654                                              &info);
 655                 if (!NT_STATUS_IS_OK(status)) {
 656                         if (open_was_deferred(smb1req->mid)) {
 657                                 return req;
 658                         }
 659                         tevent_req_nterror(req, status);
 660                         return tevent_req_post(req, ev);
 661                 }
 662
 663                 if (mxac) {
 664                         NTTIME last_write_time;
 665
 666                         unix_timespec_to_nt_time(&last_write_time,
 667                                                  result->fsp_name->st.st_ex_mtime);
 668                         if (last_write_time != max_access_time) {
 669                                 uint8_t p[8];
 670                                 uint32_t max_access_granted;
 671                                 DATA_BLOB blob = data_blob_const(p, sizeof(p));
 672
 673                                 status = smbd_check_open_rights(smb1req->conn,
 674                                                         result->fsp_name,
 675                                                         SEC_FLAG_MAXIMUM_ALLOWED,
 676                                                         &max_access_granted);
 677
 678                                 SIVAL(p, 0, NT_STATUS_V(status));
 679                                 SIVAL(p, 4, max_access_granted);
 680
 681                                 status = smb2_create_blob_add(state,
 682                                                         &out_context_blobs,
 683                                                         SMB2_CREATE_TAG_MXAC,
 684                                                         blob);
 685                                 if (!NT_STATUS_IS_OK(status)) {
 686                                         tevent_req_nterror(req, status);
 687                                         return tevent_req_post(req, ev);
 688                                 }
 689                         }
 690                 }
 691
 692                 if (qfid) {
 693                         uint8_t p[32];
 694                         DATA_BLOB blob = data_blob_const(p, sizeof(p));
 695
 696                         ZERO_STRUCT(p);
 697
 698                         /* TODO: maybe use result->file_id */
 699                         SIVAL(p, 0, result->fsp_name->st.st_ex_ino);/* FileIndexLow */
 700                         SIVAL(p, 4, result->fsp_name->st.st_ex_dev);/* FileIndexHigh */
 701
 702                         status = smb2_create_blob_add(state, &out_context_blobs,
 703                                                       SMB2_CREATE_TAG_QFID,
 704                                                       blob);
 705                         if (!NT_STATUS_IS_OK(status)) {
 706                                 tevent_req_nterror(req, status);
 707                                 return tevent_req_post(req, ev);
 708                         }
 709                 }
 710         }
 711
 712         smb2req->compat_chain_fsp = smb1req->chain_fsp;
 713
 714         state->out_oplock_level = 0;
 715         if ((in_create_disposition == FILE_SUPERSEDE)
 716             && (info == FILE_WAS_OVERWRITTEN)) {
 717                 state->out_create_action = FILE_WAS_SUPERSEDED;
 718         } else {
 719                 state->out_create_action = info;
 720         }
 721         state->out_file_attributes = dos_mode(result->conn,
 722                                            result->fsp_name);
 723         /* Deal with other possible opens having a modified
 724            write time. JRA. */
 725         ZERO_STRUCT(write_time_ts);
 726         get_file_infos(result->file_id, NULL, &write_time_ts);
 727         if (!null_timespec(write_time_ts)) {
 728                 update_stat_ex_mtime(&result->fsp_name->st, write_time_ts);
 729         }
 730
 731         unix_timespec_to_nt_time(&state->out_creation_time,
 732                         get_create_timespec(smb1req->conn, result,
 733                                         result->fsp_name));
 734         unix_timespec_to_nt_time(&state->out_last_access_time,
 735                         result->fsp_name->st.st_ex_atime);
 736         unix_timespec_to_nt_time(&state->out_last_write_time,
 737                         result->fsp_name->st.st_ex_mtime);
 738         unix_timespec_to_nt_time(&state->out_change_time,
 739                         get_change_timespec(smb1req->conn, result,
 740                                         result->fsp_name));
 741         state->out_allocation_size =
 742                         result->fsp_name->st.st_ex_blksize *
 743                         result->fsp_name->st.st_ex_blocks;
 744         state->out_end_of_file = result->fsp_name->st.st_ex_size;
 745         if (state->out_file_attributes == 0) {
 746                 state->out_file_attributes = FILE_ATTRIBUTE_NORMAL;
 747         }
 748         state->out_file_id_volatile = result->fnum;
 749         state->out_context_blobs = out_context_blobs;
 750
 751         tevent_req_done(req);
 752         return tevent_req_post(req, ev);
 753 }
 754
 755 static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
 756                         TALLOC_CTX *mem_ctx,
 757                         uint8_t *out_oplock_level,
 758                         uint32_t *out_create_action,
 759                         NTTIME *out_creation_time,
 760                         NTTIME *out_last_access_time,
 761                         NTTIME *out_last_write_time,
 762                         NTTIME *out_change_time,
 763                         uint64_t *out_allocation_size,
 764                         uint64_t *out_end_of_file,
 765                         uint32_t *out_file_attributes,
 766                         uint64_t *out_file_id_volatile,
 767                         struct smb2_create_blobs *out_context_blobs)
 768 {
 769         NTSTATUS status;
 770         struct smbd_smb2_create_state *state = tevent_req_data(req,
 771                                                struct smbd_smb2_create_state);
 772
 773         if (tevent_req_is_nterror(req, &status)) {
 774                 tevent_req_received(req);
 775                 return status;
 776         }
 777
 778         *out_oplock_level       = state->out_oplock_level;
 779         *out_create_action      = state->out_create_action;
 780         *out_creation_time      = state->out_creation_time;
 781         *out_last_access_time   = state->out_last_access_time;
 782         *out_last_write_time    = state->out_last_write_time;
 783         *out_change_time        = state->out_change_time;
 784         *out_allocation_size    = state->out_allocation_size;
 785         *out_end_of_file        = state->out_end_of_file;
 786         *out_file_attributes    = state->out_file_attributes;
 787         *out_file_id_volatile   = state->out_file_id_volatile;
 788         *out_context_blobs      = state->out_context_blobs;
 789
 790         talloc_steal(mem_ctx, state->out_context_blobs.blobs);
 791
 792         tevent_req_received(req);
 793         return NT_STATUS_OK;
 794 }
 795
 796 /*********************************************************
 797  Code for dealing with deferred opens.
 798 *********************************************************/
 799
 800 bool get_deferred_open_message_state_smb2(struct smbd_smb2_request *smb2req,
 801                         struct timeval *p_request_time,
 802                         void **pp_state)
 803 {
 804         struct smbd_smb2_create_state *state = NULL;
 805         struct tevent_req *req = NULL;
 806
 807         if (!smb2req) {
 808                 return false;
 809         }
 810         if (!smb2req->async) {
 811                 return false;
 812         }
 813         req = smb2req->subreq;
 814         if (!req) {
 815                 return false;
 816         }
 817         state = tevent_req_data(req, struct smbd_smb2_create_state);
 818         if (!state) {
 819                 return false;
 820         }
 821         if (p_request_time) {
 822                 *p_request_time = state->request_time;
 823         }
 824         if (pp_state) {
 825                 *pp_state = (void *)state->private_data.data;
 826         }
 827         return true;
 828 }
 829
 830 /*********************************************************
 831  Re-process this call early - requested by message or
 832  close.
 833 *********************************************************/
 834
 835 static struct smbd_smb2_request *find_open_smb2req(uint64_t mid)
 836 {
 837         struct smbd_server_connection *sconn = smbd_server_conn;
 838         struct smbd_smb2_request *smb2req;
 839
 840         for (smb2req = sconn->smb2.requests; smb2req; smb2req = smb2req->next) {
 841                 uint64_t message_id = get_mid_from_smb2req(smb2req);
 842                 if (message_id == mid) {
 843                         return smb2req;
 844                 }
 845         }
 846         return NULL;
 847 }
 848
 849 bool open_was_deferred_smb2(uint64_t mid)
 850 {
 851         struct smbd_smb2_create_state *state = NULL;
 852         struct smbd_smb2_request *smb2req = find_open_smb2req(mid);
 853
 854         if (!smb2req) {
 855                 DEBUG(10,("open_was_deferred_smb2: mid %llu smb2req == NULL\n",
 856                         (unsigned long long)mid));
 857                 return false;
 858         }
 859         if (!smb2req->subreq) {
 860                 return false;
 861         }
 862         if (!tevent_req_is_in_progress(smb2req->subreq)) {
 863                 return false;
 864         }
 865         state = tevent_req_data(smb2req->subreq,
 866                         struct smbd_smb2_create_state);
 867         if (!state) {
 868                 return false;
 869         }
 870         /* It's not in progress if there's no timeout event. */
 871         if (!state->te) {
 872                 return false;
 873         }
 874
 875         DEBUG(10,("open_was_deferred_smb2: mid = %llu\n",
 876                         (unsigned long long)mid));
 877
 878         return true;
 879 }
 880
 881 static void remove_deferred_open_message_smb2_internal(struct smbd_smb2_request *smb2req,
 882                                                         uint64_t mid)
 883 {
 884         struct smbd_smb2_create_state *state = NULL;
 885
 886         if (!smb2req->subreq) {
 887                 return;
 888         }
 889         if (!tevent_req_is_in_progress(smb2req->subreq)) {
 890                 return;
 891         }
 892         state = tevent_req_data(smb2req->subreq,
 893                         struct smbd_smb2_create_state);
 894         if (!state) {
 895                 return;
 896         }
 897
 898         DEBUG(10,("remove_deferred_open_message_smb2_internal: "
 899                 "mid %llu\n",
 900                 (unsigned long long)mid ));
 901
 902         /* Ensure we don't have any outstanding timer event. */
 903         TALLOC_FREE(state->te);
 904 }
 905
 906 void remove_deferred_open_message_smb2(uint64_t mid)
 907 {
 908         struct smbd_smb2_request *smb2req = find_open_smb2req(mid);
 909
 910         if (!smb2req) {
 911                 DEBUG(10,("remove_deferred_open_message_smb2: "
 912                         "can't find mid %llu\n",
 913                         (unsigned long long)mid ));
 914                 return;
 915         }
 916         remove_deferred_open_message_smb2_internal(smb2req, mid);
 917 }
 918
 919 void schedule_deferred_open_message_smb2(uint64_t mid)
 920 {
 921         struct tevent_immediate *im = NULL;
 922         struct smbd_smb2_create_state *state = NULL;
 923         struct smbd_smb2_request *smb2req = find_open_smb2req(mid);
 924
 925         if (!smb2req) {
 926                 DEBUG(10,("schedule_deferred_open_message_smb2: "
 927                         "can't find mid %llu\n",
 928                         (unsigned long long)mid ));
 929                 return;
 930         }
 931         if (!smb2req->subreq) {
 932                 return;
 933         }
 934         if (!tevent_req_is_in_progress(smb2req->subreq)) {
 935                 return;
 936         }
 937         state = tevent_req_data(smb2req->subreq,
 938                         struct smbd_smb2_create_state);
 939         if (!state) {
 940                 return;
 941         }
 942         /* Ensure we don't have any outstanding timer event. */
 943         TALLOC_FREE(state->te);
 944
 945         im = tevent_create_immediate(smb2req);
 946         if (!im) {
 947                 smbd_server_connection_terminate(smb2req->sconn,
 948                         nt_errstr(NT_STATUS_NO_MEMORY));
 949         }
 950
 951         DEBUG(10,("schedule_deferred_open_message_smb2: "
 952                 "re-processing mid %llu\n",
 953                 (unsigned long long)mid ));
 954
 955         tevent_schedule_immediate(im,
 956                         smb2req->sconn->smb2.event_ctx,
 957                         smbd_smb2_request_dispatch_immediate,
 958                         smb2req);
 959 }
 960
 961 /*********************************************************
 962  Re-process this call.
 963 *********************************************************/
 964
 965 static void smb2_deferred_open_timer(struct event_context *ev,
 966                                         struct timed_event *te,
 967                                         struct timeval _tval,
 968                                         void *private_data)
 969 {
 970         NTSTATUS status;
 971         struct smbd_smb2_create_state *state = NULL;
 972         struct smbd_smb2_request *smb2req = talloc_get_type(private_data,
 973                                                 struct smbd_smb2_request);
 974
 975         DEBUG(10,("smb2_deferred_open_timer: [idx=%d], %s\n",
 976                 smb2req->current_idx,
 977                 tevent_req_default_print(smb2req->subreq, talloc_tos()) ));
 978
 979         state = tevent_req_data(smb2req->subreq,
 980                         struct smbd_smb2_create_state);
 981         if (!state) {
 982                 return;
 983         }
 984         /*
 985          * Null this out, don't talloc_free. It will
 986          * be talloc_free'd by the tevent library when
 987          * this returns.
 988          */
 989         state->te = NULL;
 990
 991         /*
 992          * This is subtle. We must null out the callback
 993          * before resheduling, else the first call to
 994          * tevent_req_nterror() causes the _receive()
 995          * function to be called, this causing tevent_req_post()
 996          * to crash.
 997          */
 998         tevent_req_set_callback(smb2req->subreq, NULL, NULL);
 999
1000         status = smbd_smb2_request_dispatch(smb2req);
1001
1002         if (!NT_STATUS_IS_OK(status)) {
1003                 smbd_server_connection_terminate(smb2req->sconn,
1004                                 nt_errstr(status));
1005         }
1006 }
1007
1008 static bool smbd_smb2_create_cancel(struct tevent_req *req)
1009 {
1010         struct smbd_smb2_request *smb2req = NULL;
1011         struct smbd_smb2_create_state *state = tevent_req_data(req,
1012                                 struct smbd_smb2_create_state);
1013         uint64_t mid;
1014
1015         if (!state) {
1016                 return false;
1017         }
1018
1019         if (!state->smb2req) {
1020                 return false;
1021         }
1022
1023         smb2req = state->smb2req;
1024         mid = get_mid_from_smb2req(smb2req);
1025
1026         remove_deferred_open_entry(state->id, mid);
1027         remove_deferred_open_message_smb2_internal(smb2req, mid);
1028         smb2req->cancelled = true;
1029
1030         tevent_req_done(req);
1031         return true;
1032 }
1033
1034 bool push_deferred_open_message_smb2(struct smbd_smb2_request *smb2req,
1035                                 struct timeval request_time,
1036                                 struct timeval timeout,
1037                                 struct file_id id,
1038                                 char *private_data,
1039                                 size_t priv_len)
1040 {
1041         struct tevent_req *req = NULL;
1042         struct smbd_smb2_create_state *state = NULL;
1043         struct timeval end_time;
1044
1045         if (!smb2req) {
1046                 return false;
1047         }
1048         req = smb2req->subreq;
1049         if (!req) {
1050                 return false;
1051         }
1052         state = tevent_req_data(req, struct smbd_smb2_create_state);
1053         if (!state) {
1054                 return false;
1055         }
1056         state->id = id;
1057         state->request_time = request_time;
1058         state->private_data = data_blob_talloc(state, private_data,
1059                                                 priv_len);
1060         if (!state->private_data.data) {
1061                 return false;
1062         }
1063 #if 0
1064         /* Boo - turns out this isn't what W2K8R2
1065            does. It actually sends the STATUS_PENDING
1066            message followed by the STATUS_SHARING_VIOLATION
1067            message. Surely this means that all open
1068            calls (even on directories) will potentially
1069            fail in a chain.... ? And I've seen directory
1070            opens as the start of a chain. JRA.
1071         */
1072         /*
1073          * More subtlety. To match W2K8R2 don't
1074          * send a "gone async" message if it's simply
1075          * a STATUS_SHARING_VIOLATION (short) wait, not
1076          * an oplock break wait. We do this by prematurely
1077          * setting smb2req->async flag.
1078          */
1079         if (timeout.tv_sec < 2) {
1080                 DEBUG(10,("push_deferred_open_message_smb2: "
1081                         "short timer wait (usec = %u). "
1082                         "Don't send async message.\n",
1083                         (unsigned int)timeout.tv_usec ));
1084                 smb2req->async = true;
1085         }
1086 #endif
1087
1088         /* Re-schedule us to retry on timer expiry. */
1089         end_time = timeval_sum(&request_time, &timeout);
1090
1091         DEBUG(10,("push_deferred_open_message_smb2: "
1092                 "timeout at %s\n",
1093                 timeval_string(talloc_tos(),
1094                                 &end_time,
1095                                 true) ));
1096
1097         state->te = event_add_timed(smb2req->sconn->smb2.event_ctx,
1098                                 state,
1099                                 end_time,
1100                                 smb2_deferred_open_timer,
1101                                 smb2req);
1102         if (!state->te) {
1103                 return false;
1104         }
1105
1106         /* allow this request to be canceled */
1107         tevent_req_set_cancel_fn(req, smbd_smb2_create_cancel);
1108
1109         return true;
1110 }