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