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/smbd.h"
  23 #include "smbd/globals.h"
  24 #include "../libcli/smb/smb_common.h"
  25
  26 static struct tevent_req *smbd_smb2_ioctl_send(TALLOC_CTX *mem_ctx,
  27                                                struct tevent_context *ev,
  28                                                struct smbd_smb2_request *smb2req,
  29                                                uint32_t in_ctl_code,
  30                                                uint64_t in_file_id_volatile,
  31                                                DATA_BLOB in_input,
  32                                                uint32_t in_max_output,
  33                                                uint32_t in_flags);
  34 static NTSTATUS smbd_smb2_ioctl_recv(struct tevent_req *req,
  35                                      TALLOC_CTX *mem_ctx,
  36                                      DATA_BLOB *out_output);
  37
  38 static void smbd_smb2_request_ioctl_done(struct tevent_req *subreq);
  39 NTSTATUS smbd_smb2_request_process_ioctl(struct smbd_smb2_request *req)
  40 {
  41         const uint8_t *inhdr;
  42         const uint8_t *inbody;
  43         int i = req->current_idx;
  44         size_t expected_body_size = 0x39;
  45         size_t body_size;
  46         uint32_t in_ctl_code;
  47         uint64_t in_file_id_persistent;
  48         uint64_t in_file_id_volatile;
  49         uint32_t in_input_offset;
  50         uint32_t in_input_length;
  51         DATA_BLOB in_input_buffer;
  52         uint32_t in_max_output_length;
  53         uint32_t in_flags;
  54         struct tevent_req *subreq;
  55
  56         inhdr = (const uint8_t *)req->in.vector[i+0].iov_base;
  57         if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
  58                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  59         }
  60
  61         inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
  62
  63         body_size = SVAL(inbody, 0x00);
  64         if (body_size != expected_body_size) {
  65                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  66         }
  67
  68         in_ctl_code             = IVAL(inbody, 0x04);
  69         in_file_id_persistent   = BVAL(inbody, 0x08);
  70         in_file_id_volatile     = BVAL(inbody, 0x10);
  71         in_input_offset         = IVAL(inbody, 0x18);
  72         in_input_length         = IVAL(inbody, 0x1C);
  73         in_max_output_length    = IVAL(inbody, 0x2C);
  74         in_flags                = IVAL(inbody, 0x30);
  75
  76         if (in_input_offset != (SMB2_HDR_BODY + (body_size & 0xFFFFFFFE))) {
  77                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  78         }
  79
  80         if (in_input_length > req->in.vector[i+2].iov_len) {
  81                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  82         }
  83
  84         in_input_buffer.data = (uint8_t *)req->in.vector[i+2].iov_base;
  85         in_input_buffer.length = in_input_length;
  86
  87         if (req->compat_chain_fsp) {
  88                 /* skip check */
  89         } else if (in_file_id_persistent == UINT64_MAX &&
  90                    in_file_id_volatile == UINT64_MAX) {
  91                 /* without a handle */
  92         } else if (in_file_id_persistent != in_file_id_volatile) {
  93                 return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
  94         }
  95
  96         subreq = smbd_smb2_ioctl_send(req,
  97                                       req->sconn->smb2.event_ctx,
  98                                       req,
  99                                       in_ctl_code,
 100                                       in_file_id_volatile,
 101                                       in_input_buffer,
 102                                       in_max_output_length,
 103                                       in_flags);
 104         if (subreq == NULL) {
 105                 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 106         }
 107         tevent_req_set_callback(subreq, smbd_smb2_request_ioctl_done, req);
 108
 109         return smbd_smb2_request_pending_queue(req, subreq);
 110 }
 111
 112 static void smbd_smb2_request_ioctl_done(struct tevent_req *subreq)
 113 {
 114         struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
 115                                         struct smbd_smb2_request);
 116         const uint8_t *inbody;
 117         int i = req->current_idx;
 118         uint8_t *outhdr;
 119         DATA_BLOB outbody;
 120         DATA_BLOB outdyn;
 121         uint32_t in_ctl_code;
 122         uint64_t in_file_id_persistent;
 123         uint64_t in_file_id_volatile;
 124         uint32_t out_input_offset;
 125         uint32_t out_output_offset;
 126         DATA_BLOB out_output_buffer = data_blob_null;
 127         NTSTATUS status;
 128         NTSTATUS error; /* transport error */
 129
 130         status = smbd_smb2_ioctl_recv(subreq, req, &out_output_buffer);
 131
 132         DEBUG(10,("smbd_smb2_request_ioctl_done: smbd_smb2_ioctl_recv returned "
 133                 "%u status %s\n",
 134                 (unsigned int)out_output_buffer.length,
 135                 nt_errstr(status) ));
 136
 137         TALLOC_FREE(subreq);
 138         if (NT_STATUS_EQUAL(status, STATUS_BUFFER_OVERFLOW)) {
 139                 /* also ok */
 140         } else if (!NT_STATUS_IS_OK(status)) {
 141                 error = smbd_smb2_request_error(req, status);
 142                 if (!NT_STATUS_IS_OK(error)) {
 143                         smbd_server_connection_terminate(req->sconn,
 144                                                          nt_errstr(error));
 145                         return;
 146                 }
 147                 return;
 148         }
 149
 150         out_input_offset = SMB2_HDR_BODY + 0x30;
 151         out_output_offset = SMB2_HDR_BODY + 0x30;
 152
 153         inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
 154
 155         in_ctl_code             = IVAL(inbody, 0x04);
 156         in_file_id_persistent   = BVAL(inbody, 0x08);
 157         in_file_id_volatile     = BVAL(inbody, 0x10);
 158
 159         outhdr = (uint8_t *)req->out.vector[i].iov_base;
 160
 161         outbody = data_blob_talloc(req->out.vector, NULL, 0x30);
 162         if (outbody.data == NULL) {
 163                 error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 164                 if (!NT_STATUS_IS_OK(error)) {
 165                         smbd_server_connection_terminate(req->sconn,
 166                                                          nt_errstr(error));
 167                         return;
 168                 }
 169                 return;
 170         }
 171
 172         SSVAL(outbody.data, 0x00, 0x30 + 1);    /* struct size */
 173         SSVAL(outbody.data, 0x02, 0);           /* reserved */
 174         SIVAL(outbody.data, 0x04,
 175               in_ctl_code);                     /* ctl code */
 176         SBVAL(outbody.data, 0x08,
 177               in_file_id_persistent);           /* file id (persistent) */
 178         SBVAL(outbody.data, 0x10,
 179               in_file_id_volatile);             /* file id (volatile) */
 180         SIVAL(outbody.data, 0x18,
 181               out_input_offset);                /* input offset */
 182         SIVAL(outbody.data, 0x1C, 0);           /* input count */
 183         SIVAL(outbody.data, 0x20,
 184               out_output_offset);               /* output offset */
 185         SIVAL(outbody.data, 0x24,
 186               out_output_buffer.length);        /* output count */
 187         SIVAL(outbody.data, 0x28, 0);           /* flags */
 188         SIVAL(outbody.data, 0x2C, 0);           /* reserved */
 189
 190         /*
 191          * Note: Windows Vista and 2008 send back also the
 192          *       input from the request. But it was fixed in
 193          *       Windows 7.
 194          */
 195         outdyn = out_output_buffer;
 196
 197         error = smbd_smb2_request_done_ex(req, status, outbody, &outdyn,
 198                                           __location__);
 199         if (!NT_STATUS_IS_OK(error)) {
 200                 smbd_server_connection_terminate(req->sconn,
 201                                                  nt_errstr(error));
 202                 return;
 203         }
 204 }
 205
 206 struct smbd_smb2_ioctl_state {
 207         struct smbd_smb2_request *smb2req;
 208         struct smb_request *smbreq;
 209         files_struct *fsp;
 210         DATA_BLOB in_input;
 211         uint32_t in_max_output;
 212         DATA_BLOB out_output;
 213 };
 214
 215 static void smbd_smb2_ioctl_pipe_write_done(struct tevent_req *subreq);
 216 static void smbd_smb2_ioctl_pipe_read_done(struct tevent_req *subreq);
 217
 218 static struct tevent_req *smbd_smb2_ioctl_send(TALLOC_CTX *mem_ctx,
 219                                                struct tevent_context *ev,
 220                                                struct smbd_smb2_request *smb2req,
 221                                                uint32_t in_ctl_code,
 222                                                uint64_t in_file_id_volatile,
 223                                                DATA_BLOB in_input,
 224                                                uint32_t in_max_output,
 225                                                uint32_t in_flags)
 226 {
 227         struct tevent_req *req;
 228         struct smbd_smb2_ioctl_state *state;
 229         struct smb_request *smbreq;
 230         files_struct *fsp = NULL;
 231         struct tevent_req *subreq;
 232
 233         req = tevent_req_create(mem_ctx, &state,
 234                                 struct smbd_smb2_ioctl_state);
 235         if (req == NULL) {
 236                 return NULL;
 237         }
 238         state->smb2req = smb2req;
 239         state->smbreq = NULL;
 240         state->fsp = NULL;
 241         state->in_input = in_input;
 242         state->in_max_output = in_max_output;
 243         state->out_output = data_blob_null;
 244
 245         DEBUG(10,("smbd_smb2_ioctl: file_id[0x%016llX]\n",
 246                   (unsigned long long)in_file_id_volatile));
 247
 248         smbreq = smbd_smb2_fake_smb_request(smb2req);
 249         if (tevent_req_nomem(smbreq, req)) {
 250                 return tevent_req_post(req, ev);
 251         }
 252         state->smbreq = smbreq;
 253
 254         if (in_file_id_volatile != UINT64_MAX) {
 255                 fsp = file_fsp(smbreq, (uint16_t)in_file_id_volatile);
 256                 if (fsp == NULL) {
 257                         tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 258                         return tevent_req_post(req, ev);
 259                 }
 260                 if (smbreq->conn != fsp->conn) {
 261                         tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 262                         return tevent_req_post(req, ev);
 263                 }
 264                 if (smb2req->session->vuid != fsp->vuid) {
 265                         tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 266                         return tevent_req_post(req, ev);
 267                 }
 268                 state->fsp = fsp;
 269         }
 270
 271         switch (in_ctl_code) {
 272         case 0x00060194: /* FSCTL_DFS_GET_REFERRALS */
 273         {
 274                 uint16_t in_max_referral_level;
 275                 DATA_BLOB in_file_name_buffer;
 276                 char *in_file_name_string;
 277                 size_t in_file_name_string_size;
 278                 bool ok;
 279                 bool overflow = false;
 280                 NTSTATUS status;
 281                 int dfs_size;
 282                 char *dfs_data = NULL;
 283
 284                 if (!IS_IPC(smbreq->conn)) {
 285                         tevent_req_nterror(req, NT_STATUS_INVALID_DEVICE_REQUEST);
 286                         return tevent_req_post(req, ev);
 287                 }
 288
 289                 if (!lp_host_msdfs()) {
 290                         tevent_req_nterror(req, NT_STATUS_FS_DRIVER_REQUIRED);
 291                         return tevent_req_post(req, ev);
 292                 }
 293
 294                 if (in_input.length < (2 + 2)) {
 295                         tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 296                         return tevent_req_post(req, ev);
 297                 }
 298
 299                 in_max_referral_level = SVAL(in_input.data, 0);
 300                 in_file_name_buffer.data = in_input.data + 2;
 301                 in_file_name_buffer.length = in_input.length - 2;
 302
 303                 ok = convert_string_talloc(state, CH_UTF16, CH_UNIX,
 304                                            in_file_name_buffer.data,
 305                                            in_file_name_buffer.length,
 306                                            &in_file_name_string,
 307                                            &in_file_name_string_size, false);
 308                 if (!ok) {
 309                         tevent_req_nterror(req, NT_STATUS_ILLEGAL_CHARACTER);
 310                         return tevent_req_post(req, ev);
 311                 }
 312
 313                 dfs_size = setup_dfs_referral(smbreq->conn,
 314                                               in_file_name_string,
 315                                               in_max_referral_level,
 316                                               &dfs_data, &status);
 317                 if (dfs_size < 0) {
 318                         tevent_req_nterror(req, status);
 319                         return tevent_req_post(req, ev);
 320                 }
 321
 322                 if (dfs_size > in_max_output) {
 323                         /*
 324                          * TODO: we need a testsuite for this
 325                          */
 326                         overflow = true;
 327                         dfs_size = in_max_output;
 328                 }
 329
 330                 state->out_output = data_blob_talloc(state,
 331                                                      (uint8_t *)dfs_data,
 332                                                      dfs_size);
 333                 SAFE_FREE(dfs_data);
 334                 if (dfs_size > 0 &&
 335                     tevent_req_nomem(state->out_output.data, req)) {
 336                         return tevent_req_post(req, ev);
 337                 }
 338
 339                 if (overflow) {
 340                         tevent_req_nterror(req, STATUS_BUFFER_OVERFLOW);
 341                 } else {
 342                         tevent_req_done(req);
 343                 }
 344                 return tevent_req_post(req, ev);
 345         }
 346         case 0x0011C017: /* FSCTL_PIPE_TRANSCEIVE */
 347
 348                 if (!IS_IPC(smbreq->conn)) {
 349                         tevent_req_nterror(req, NT_STATUS_NOT_SUPPORTED);
 350                         return tevent_req_post(req, ev);
 351                 }
 352
 353                 if (fsp == NULL) {
 354                         tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 355                         return tevent_req_post(req, ev);
 356                 }
 357
 358                 if (!fsp_is_np(fsp)) {
 359                         tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 360                         return tevent_req_post(req, ev);
 361                 }
 362
 363                 DEBUG(10,("smbd_smb2_ioctl_send: np_write_send of size %u\n",
 364                         (unsigned int)in_input.length ));
 365
 366                 subreq = np_write_send(state, ev,
 367                                        fsp->fake_file_handle,
 368                                        in_input.data,
 369                                        in_input.length);
 370                 if (tevent_req_nomem(subreq, req)) {
 371                         return tevent_req_post(req, ev);
 372                 }
 373                 tevent_req_set_callback(subreq,
 374                                         smbd_smb2_ioctl_pipe_write_done,
 375                                         req);
 376                 return req;
 377
 378         default:
 379                 if (IS_IPC(smbreq->conn)) {
 380                         tevent_req_nterror(req, NT_STATUS_FS_DRIVER_REQUIRED);
 381                         return tevent_req_post(req, ev);
 382                 }
 383                 tevent_req_nterror(req, NT_STATUS_INVALID_DEVICE_REQUEST);
 384                 return tevent_req_post(req, ev);
 385         }
 386
 387         tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
 388         return tevent_req_post(req, ev);
 389 }
 390
 391 static void smbd_smb2_ioctl_pipe_write_done(struct tevent_req *subreq)
 392 {
 393         struct tevent_req *req = tevent_req_callback_data(subreq,
 394                                  struct tevent_req);
 395         struct smbd_smb2_ioctl_state *state = tevent_req_data(req,
 396                                               struct smbd_smb2_ioctl_state);
 397         NTSTATUS status;
 398         ssize_t nwritten = -1;
 399
 400         status = np_write_recv(subreq, &nwritten);
 401
 402         DEBUG(10,("smbd_smb2_ioctl_pipe_write_done: received %ld\n",
 403                 (long int)nwritten ));
 404
 405         TALLOC_FREE(subreq);
 406         if (!NT_STATUS_IS_OK(status)) {
 407                 tevent_req_nterror(req, status);
 408                 return;
 409         }
 410
 411         if (nwritten != state->in_input.length) {
 412                 tevent_req_nterror(req, NT_STATUS_PIPE_NOT_AVAILABLE);
 413                 return;
 414         }
 415
 416         state->out_output = data_blob_talloc(state, NULL, state->in_max_output);
 417         if (state->in_max_output > 0 &&
 418             tevent_req_nomem(state->out_output.data, req)) {
 419                 return;
 420         }
 421
 422         DEBUG(10,("smbd_smb2_ioctl_pipe_write_done: issuing np_read_send "
 423                 "of size %u\n",
 424                 (unsigned int)state->out_output.length ));
 425
 426         TALLOC_FREE(subreq);
 427         subreq = np_read_send(state->smbreq->conn,
 428                               state->smb2req->sconn->smb2.event_ctx,
 429                               state->fsp->fake_file_handle,
 430                               state->out_output.data,
 431                               state->out_output.length);
 432         if (tevent_req_nomem(subreq, req)) {
 433                 return;
 434         }
 435         tevent_req_set_callback(subreq, smbd_smb2_ioctl_pipe_read_done, req);
 436 }
 437
 438 static void smbd_smb2_ioctl_pipe_read_done(struct tevent_req *subreq)
 439 {
 440         struct tevent_req *req = tevent_req_callback_data(subreq,
 441                                  struct tevent_req);
 442         struct smbd_smb2_ioctl_state *state = tevent_req_data(req,
 443                                               struct smbd_smb2_ioctl_state);
 444         NTSTATUS status;
 445         ssize_t nread = -1;
 446         bool is_data_outstanding = false;
 447
 448         status = np_read_recv(subreq, &nread, &is_data_outstanding);
 449
 450         DEBUG(10,("smbd_smb2_ioctl_pipe_read_done: np_read_recv nread = %d "
 451                  "is_data_outstanding = %d, status = %s\n",
 452                 (int)nread,
 453                 (int)is_data_outstanding,
 454                 nt_errstr(status) ));
 455
 456         TALLOC_FREE(subreq);
 457         if (!NT_STATUS_IS_OK(status)) {
 458                 tevent_req_nterror(req, status);
 459                 return;
 460         }
 461
 462         state->out_output.length = nread;
 463
 464         tevent_req_done(req);
 465 }
 466
 467 static NTSTATUS smbd_smb2_ioctl_recv(struct tevent_req *req,
 468                                      TALLOC_CTX *mem_ctx,
 469                                      DATA_BLOB *out_output)
 470 {
 471         NTSTATUS status = NT_STATUS_OK;
 472         struct smbd_smb2_ioctl_state *state = tevent_req_data(req,
 473                                               struct smbd_smb2_ioctl_state);
 474
 475         if (tevent_req_is_nterror(req, &status)) {
 476                 if (!NT_STATUS_EQUAL(status, STATUS_BUFFER_OVERFLOW)) {
 477                         tevent_req_received(req);
 478                         return status;
 479                 }
 480         }
 481
 482         *out_output = state->out_output;
 483         talloc_steal(mem_ctx, out_output->data);
 484
 485         tevent_req_received(req);
 486         return status;
 487 }