source3/smbd/smb2_ioctl.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_ioctl_send(TALLOC_CTX *mem_ctx,
  26                                                struct tevent_context *ev,
  27                                                struct smbd_smb2_request *smb2req,
  28                                                uint32_t in_ctl_code,
  29                                                uint64_t in_file_id_volatile,
  30                                                DATA_BLOB in_input,
  31                                                uint32_t in_max_output,
  32                                                uint32_t in_flags);
  33 static NTSTATUS smbd_smb2_ioctl_recv(struct tevent_req *req,
  34                                      TALLOC_CTX *mem_ctx,
  35                                      DATA_BLOB *out_output);
  36
  37 static void smbd_smb2_request_ioctl_done(struct tevent_req *subreq);
  38 NTSTATUS smbd_smb2_request_process_ioctl(struct smbd_smb2_request *req)
  39 {
  40         const uint8_t *inhdr;
  41         const uint8_t *inbody;
  42         int i = req->current_idx;
  43         size_t expected_body_size = 0x39;
  44         size_t body_size;
  45         uint32_t in_ctl_code;
  46         uint64_t in_file_id_persistent;
  47         uint64_t in_file_id_volatile;
  48         uint32_t in_input_offset;
  49         uint32_t in_input_length;
  50         DATA_BLOB in_input_buffer;
  51         uint32_t in_max_output_length;
  52         uint32_t in_flags;
  53         struct tevent_req *subreq;
  54
  55         inhdr = (const uint8_t *)req->in.vector[i+0].iov_base;
  56         if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
  57                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  58         }
  59
  60         inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
  61
  62         body_size = SVAL(inbody, 0x00);
  63         if (body_size != expected_body_size) {
  64                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  65         }
  66
  67         in_ctl_code             = IVAL(inbody, 0x04);
  68         in_file_id_persistent   = BVAL(inbody, 0x08);
  69         in_file_id_volatile     = BVAL(inbody, 0x10);
  70         in_input_offset         = IVAL(inbody, 0x18);
  71         in_input_length         = IVAL(inbody, 0x1C);
  72         in_max_output_length    = IVAL(inbody, 0x2C);
  73         in_flags                = IVAL(inbody, 0x30);
  74
  75         if (in_input_offset != (SMB2_HDR_BODY + (body_size & 0xFFFFFFFE))) {
  76                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  77         }
  78
  79         if (in_input_length > req->in.vector[i+2].iov_len) {
  80                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  81         }
  82
  83         in_input_buffer.data = (uint8_t *)req->in.vector[i+2].iov_base;
  84         in_input_buffer.length = in_input_length;
  85
  86         if (req->compat_chain_fsp) {
  87                 /* skip check */
  88         } else if (in_file_id_persistent == UINT64_MAX &&
  89                    in_file_id_volatile == UINT64_MAX) {
  90                 /* without a handle */
  91         } else if (in_file_id_persistent != in_file_id_volatile) {
  92                 return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
  93         }
  94
  95         subreq = smbd_smb2_ioctl_send(req,
  96                                       req->sconn->smb2.event_ctx,
  97                                       req,
  98                                       in_ctl_code,
  99                                       in_file_id_volatile,
 100                                       in_input_buffer,
 101                                       in_max_output_length,
 102                                       in_flags);
 103         if (subreq == NULL) {
 104                 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 105         }
 106         tevent_req_set_callback(subreq, smbd_smb2_request_ioctl_done, req);
 107
 108         return smbd_smb2_request_pending_queue(req, subreq);
 109 }
 110
 111 static void smbd_smb2_request_ioctl_done(struct tevent_req *subreq)
 112 {
 113         struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
 114                                         struct smbd_smb2_request);
 115         const uint8_t *inbody;
 116         int i = req->current_idx;
 117         uint8_t *outhdr;
 118         DATA_BLOB outbody;
 119         DATA_BLOB outdyn;
 120         uint32_t in_ctl_code;
 121         uint64_t in_file_id_persistent;
 122         uint64_t in_file_id_volatile;
 123         uint32_t out_input_offset;
 124         uint32_t out_output_offset;
 125         DATA_BLOB out_output_buffer = data_blob_null;
 126         NTSTATUS status;
 127         NTSTATUS error; /* transport error */
 128
 129         status = smbd_smb2_ioctl_recv(subreq, req, &out_output_buffer);
 130
 131         DEBUG(10,("smbd_smb2_request_ioctl_done: smbd_smb2_ioctl_recv returned "
 132                 "%u status %s\n",
 133                 (unsigned int)out_output_buffer.length,
 134                 nt_errstr(status) ));
 135
 136         TALLOC_FREE(subreq);
 137         if (NT_STATUS_EQUAL(status, STATUS_BUFFER_OVERFLOW)) {
 138                 /* also ok */
 139         } else if (!NT_STATUS_IS_OK(status)) {
 140                 error = smbd_smb2_request_error(req, status);
 141                 if (!NT_STATUS_IS_OK(error)) {
 142                         smbd_server_connection_terminate(req->sconn,
 143                                                          nt_errstr(error));
 144                         return;
 145                 }
 146                 return;
 147         }
 148
 149         out_input_offset = SMB2_HDR_BODY + 0x30;
 150         out_output_offset = SMB2_HDR_BODY + 0x30;
 151
 152         inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
 153
 154         in_ctl_code             = IVAL(inbody, 0x04);
 155         in_file_id_persistent   = BVAL(inbody, 0x08);
 156         in_file_id_volatile     = BVAL(inbody, 0x10);
 157
 158         outhdr = (uint8_t *)req->out.vector[i].iov_base;
 159
 160         outbody = data_blob_talloc(req->out.vector, NULL, 0x30);
 161         if (outbody.data == NULL) {
 162                 error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 163                 if (!NT_STATUS_IS_OK(error)) {
 164                         smbd_server_connection_terminate(req->sconn,
 165                                                          nt_errstr(error));
 166                         return;
 167                 }
 168                 return;
 169         }
 170
 171         SSVAL(outbody.data, 0x00, 0x30 + 1);    /* struct size */
 172         SSVAL(outbody.data, 0x02, 0);           /* reserved */
 173         SIVAL(outbody.data, 0x04,
 174               in_ctl_code);                     /* ctl code */
 175         SBVAL(outbody.data, 0x08,
 176               in_file_id_persistent);           /* file id (persistent) */
 177         SBVAL(outbody.data, 0x10,
 178               in_file_id_volatile);             /* file id (volatile) */
 179         SIVAL(outbody.data, 0x18,
 180               out_input_offset);                /* input offset */
 181         SIVAL(outbody.data, 0x1C, 0);           /* input count */
 182         SIVAL(outbody.data, 0x20,
 183               out_output_offset);               /* output offset */
 184         SIVAL(outbody.data, 0x24,
 185               out_output_buffer.length);        /* output count */
 186         SIVAL(outbody.data, 0x28, 0);           /* flags */
 187         SIVAL(outbody.data, 0x2C, 0);           /* reserved */
 188
 189         /*
 190          * Note: Windows Vista and 2008 send back also the
 191          *       input from the request. But it was fixed in
 192          *       Windows 7.
 193          */
 194         outdyn = out_output_buffer;
 195
 196         error = smbd_smb2_request_done_ex(req, status, outbody, &outdyn,
 197                                           __location__);
 198         if (!NT_STATUS_IS_OK(error)) {
 199                 smbd_server_connection_terminate(req->sconn,
 200                                                  nt_errstr(error));
 201                 return;
 202         }
 203 }
 204
 205 struct smbd_smb2_ioctl_state {
 206         struct smbd_smb2_request *smb2req;
 207         struct smb_request *smbreq;
 208         files_struct *fsp;
 209         DATA_BLOB in_input;
 210         uint32_t in_max_output;
 211         DATA_BLOB out_output;
 212 };
 213
 214 static void smbd_smb2_ioctl_pipe_write_done(struct tevent_req *subreq);
 215 static void smbd_smb2_ioctl_pipe_read_done(struct tevent_req *subreq);
 216
 217 static struct tevent_req *smbd_smb2_ioctl_send(TALLOC_CTX *mem_ctx,
 218                                                struct tevent_context *ev,
 219                                                struct smbd_smb2_request *smb2req,
 220                                                uint32_t in_ctl_code,
 221                                                uint64_t in_file_id_volatile,
 222                                                DATA_BLOB in_input,
 223                                                uint32_t in_max_output,
 224                                                uint32_t in_flags)
 225 {
 226         struct tevent_req *req;
 227         struct smbd_smb2_ioctl_state *state;
 228         struct smb_request *smbreq;
 229         files_struct *fsp = NULL;
 230         struct tevent_req *subreq;
 231
 232         req = tevent_req_create(mem_ctx, &state,
 233                                 struct smbd_smb2_ioctl_state);
 234         if (req == NULL) {
 235                 return NULL;
 236         }
 237         state->smb2req = smb2req;
 238         state->smbreq = NULL;
 239         state->fsp = NULL;
 240         state->in_input = in_input;
 241         state->in_max_output = in_max_output;
 242         state->out_output = data_blob_null;
 243
 244         DEBUG(10,("smbd_smb2_ioctl: file_id[0x%016llX]\n",
 245                   (unsigned long long)in_file_id_volatile));
 246
 247         smbreq = smbd_smb2_fake_smb_request(smb2req);
 248         if (tevent_req_nomem(smbreq, req)) {
 249                 return tevent_req_post(req, ev);
 250         }
 251         state->smbreq = smbreq;
 252
 253         if (in_file_id_volatile != UINT64_MAX) {
 254                 fsp = file_fsp(smbreq, (uint16_t)in_file_id_volatile);
 255                 if (fsp == NULL) {
 256                         tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 257                         return tevent_req_post(req, ev);
 258                 }
 259                 if (smbreq->conn != fsp->conn) {
 260                         tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 261                         return tevent_req_post(req, ev);
 262                 }
 263                 if (smb2req->session->vuid != fsp->vuid) {
 264                         tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 265                         return tevent_req_post(req, ev);
 266                 }
 267                 state->fsp = fsp;
 268         }
 269
 270         switch (in_ctl_code) {
 271         case 0x00060194: /* FSCTL_DFS_GET_REFERRALS */
 272         {
 273                 uint16_t in_max_referral_level;
 274                 DATA_BLOB in_file_name_buffer;
 275                 char *in_file_name_string;
 276                 size_t in_file_name_string_size;
 277                 bool ok;
 278                 bool overflow = false;
 279                 NTSTATUS status;
 280                 int dfs_size;
 281                 char *dfs_data = NULL;
 282
 283                 if (!IS_IPC(smbreq->conn)) {
 284                         tevent_req_nterror(req, NT_STATUS_INVALID_DEVICE_REQUEST);
 285                         return tevent_req_post(req, ev);
 286                 }
 287
 288                 if (!lp_host_msdfs()) {
 289                         tevent_req_nterror(req, NT_STATUS_FS_DRIVER_REQUIRED);
 290                         return tevent_req_post(req, ev);
 291                 }
 292
 293                 if (in_input.length < (2 + 2)) {
 294                         tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 295                         return tevent_req_post(req, ev);
 296                 }
 297
 298                 in_max_referral_level = SVAL(in_input.data, 0);
 299                 in_file_name_buffer.data = in_input.data + 2;
 300                 in_file_name_buffer.length = in_input.length - 2;
 301
 302                 ok = convert_string_talloc(state, CH_UTF16, CH_UNIX,
 303                                            in_file_name_buffer.data,
 304                                            in_file_name_buffer.length,
 305                                            &in_file_name_string,
 306                                            &in_file_name_string_size, false);
 307                 if (!ok) {
 308                         tevent_req_nterror(req, NT_STATUS_ILLEGAL_CHARACTER);
 309                         return tevent_req_post(req, ev);
 310                 }
 311
 312                 dfs_size = setup_dfs_referral(smbreq->conn,
 313                                               in_file_name_string,
 314                                               in_max_referral_level,
 315                                               &dfs_data, &status);
 316                 if (dfs_size < 0) {
 317                         tevent_req_nterror(req, status);
 318                         return tevent_req_post(req, ev);
 319                 }
 320
 321                 if (dfs_size > in_max_output) {
 322                         /*
 323                          * TODO: we need a testsuite for this
 324                          */
 325                         overflow = true;
 326                         dfs_size = in_max_output;
 327                 }
 328
 329                 state->out_output = data_blob_talloc(state,
 330                                                      (uint8_t *)dfs_data,
 331                                                      dfs_size);
 332                 SAFE_FREE(dfs_data);
 333                 if (dfs_size > 0 &&
 334                     tevent_req_nomem(state->out_output.data, req)) {
 335                         return tevent_req_post(req, ev);
 336                 }
 337
 338                 if (overflow) {
 339                         tevent_req_nterror(req, STATUS_BUFFER_OVERFLOW);
 340                 } else {
 341                         tevent_req_done(req);
 342                 }
 343                 return tevent_req_post(req, ev);
 344         }
 345         case 0x0011C017: /* FSCTL_PIPE_TRANSCEIVE */
 346
 347                 if (!IS_IPC(smbreq->conn)) {
 348                         tevent_req_nterror(req, NT_STATUS_NOT_SUPPORTED);
 349                         return tevent_req_post(req, ev);
 350                 }
 351
 352                 if (fsp == NULL) {
 353                         tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 354                         return tevent_req_post(req, ev);
 355                 }
 356
 357                 if (!fsp_is_np(fsp)) {
 358                         tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 359                         return tevent_req_post(req, ev);
 360                 }
 361
 362                 DEBUG(10,("smbd_smb2_ioctl_send: np_write_send of size %u\n",
 363                         (unsigned int)in_input.length ));
 364
 365                 subreq = np_write_send(state, ev,
 366                                        fsp->fake_file_handle,
 367                                        in_input.data,
 368                                        in_input.length);
 369                 if (tevent_req_nomem(subreq, req)) {
 370                         return tevent_req_post(req, ev);
 371                 }
 372                 tevent_req_set_callback(subreq,
 373                                         smbd_smb2_ioctl_pipe_write_done,
 374                                         req);
 375                 return req;
 376
 377         default:
 378                 if (IS_IPC(smbreq->conn)) {
 379                         tevent_req_nterror(req, NT_STATUS_FS_DRIVER_REQUIRED);
 380                         return tevent_req_post(req, ev);
 381                 }
 382                 tevent_req_nterror(req, NT_STATUS_INVALID_DEVICE_REQUEST);
 383                 return tevent_req_post(req, ev);
 384         }
 385
 386         tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
 387         return tevent_req_post(req, ev);
 388 }
 389
 390 static void smbd_smb2_ioctl_pipe_write_done(struct tevent_req *subreq)
 391 {
 392         struct tevent_req *req = tevent_req_callback_data(subreq,
 393                                  struct tevent_req);
 394         struct smbd_smb2_ioctl_state *state = tevent_req_data(req,
 395                                               struct smbd_smb2_ioctl_state);
 396         NTSTATUS status;
 397         ssize_t nwritten = -1;
 398
 399         status = np_write_recv(subreq, &nwritten);
 400
 401         DEBUG(10,("smbd_smb2_ioctl_pipe_write_done: received %ld\n",
 402                 (long int)nwritten ));
 403
 404         TALLOC_FREE(subreq);
 405         if (!NT_STATUS_IS_OK(status)) {
 406                 tevent_req_nterror(req, status);
 407                 return;
 408         }
 409
 410         if (nwritten != state->in_input.length) {
 411                 tevent_req_nterror(req, NT_STATUS_PIPE_NOT_AVAILABLE);
 412                 return;
 413         }
 414
 415         state->out_output = data_blob_talloc(state, NULL, state->in_max_output);
 416         if (state->in_max_output > 0 &&
 417             tevent_req_nomem(state->out_output.data, req)) {
 418                 return;
 419         }
 420
 421         DEBUG(10,("smbd_smb2_ioctl_pipe_write_done: issuing np_read_send "
 422                 "of size %u\n",
 423                 (unsigned int)state->out_output.length ));
 424
 425         TALLOC_FREE(subreq);
 426         subreq = np_read_send(state->smbreq->conn,
 427                               state->smb2req->sconn->smb2.event_ctx,
 428                               state->fsp->fake_file_handle,
 429                               state->out_output.data,
 430                               state->out_output.length);
 431         if (tevent_req_nomem(subreq, req)) {
 432                 return;
 433         }
 434         tevent_req_set_callback(subreq, smbd_smb2_ioctl_pipe_read_done, req);
 435 }
 436
 437 static void smbd_smb2_ioctl_pipe_read_done(struct tevent_req *subreq)
 438 {
 439         struct tevent_req *req = tevent_req_callback_data(subreq,
 440                                  struct tevent_req);
 441         struct smbd_smb2_ioctl_state *state = tevent_req_data(req,
 442                                               struct smbd_smb2_ioctl_state);
 443         NTSTATUS status;
 444         ssize_t nread = -1;
 445         bool is_data_outstanding = false;
 446
 447         status = np_read_recv(subreq, &nread, &is_data_outstanding);
 448
 449         DEBUG(10,("smbd_smb2_ioctl_pipe_read_done: np_read_recv nread = %d "
 450                  "is_data_outstanding = %d, status = %s\n",
 451                 (int)nread,
 452                 (int)is_data_outstanding,
 453                 nt_errstr(status) ));
 454
 455         TALLOC_FREE(subreq);
 456         if (!NT_STATUS_IS_OK(status)) {
 457                 tevent_req_nterror(req, status);
 458                 return;
 459         }
 460
 461         state->out_output.length = nread;
 462
 463         tevent_req_done(req);
 464 }
 465
 466 static NTSTATUS smbd_smb2_ioctl_recv(struct tevent_req *req,
 467                                      TALLOC_CTX *mem_ctx,
 468                                      DATA_BLOB *out_output)
 469 {
 470         NTSTATUS status = NT_STATUS_OK;
 471         struct smbd_smb2_ioctl_state *state = tevent_req_data(req,
 472                                               struct smbd_smb2_ioctl_state);
 473
 474         if (tevent_req_is_nterror(req, &status)) {
 475                 if (!NT_STATUS_EQUAL(status, STATUS_BUFFER_OVERFLOW)) {
 476                         tevent_req_received(req);
 477                         return status;
 478                 }
 479         }
 480
 481         *out_output = state->out_output;
 482         talloc_steal(mem_ctx, out_output->data);
 483
 484         tevent_req_received(req);
 485         return status;
 486 }