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 #include "../lib/util/tevent_ntstatus.h"
  26 #include "rpc_server/srv_pipe_hnd.h"
  27
  28 static struct tevent_req *smbd_smb2_ioctl_send(TALLOC_CTX *mem_ctx,
  29                                                struct tevent_context *ev,
  30                                                struct smbd_smb2_request *smb2req,
  31                                                uint32_t in_ctl_code,
  32                                                uint64_t in_file_id_volatile,
  33                                                DATA_BLOB in_input,
  34                                                uint32_t in_max_output,
  35                                                uint32_t in_flags);
  36 static NTSTATUS smbd_smb2_ioctl_recv(struct tevent_req *req,
  37                                      TALLOC_CTX *mem_ctx,
  38                                      DATA_BLOB *out_output);
  39
  40 static void smbd_smb2_request_ioctl_done(struct tevent_req *subreq);
  41 NTSTATUS smbd_smb2_request_process_ioctl(struct smbd_smb2_request *req)
  42 {
  43         const uint8_t *inhdr;
  44         const uint8_t *inbody;
  45         int i = req->current_idx;
  46         size_t expected_body_size = 0x39;
  47         size_t body_size;
  48         uint32_t in_ctl_code;
  49         uint64_t in_file_id_persistent;
  50         uint64_t in_file_id_volatile;
  51         uint32_t in_input_offset;
  52         uint32_t in_input_length;
  53         DATA_BLOB in_input_buffer;
  54         uint32_t in_max_output_length;
  55         uint32_t in_flags;
  56         struct tevent_req *subreq;
  57
  58         inhdr = (const uint8_t *)req->in.vector[i+0].iov_base;
  59         if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
  60                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  61         }
  62
  63         inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
  64
  65         body_size = SVAL(inbody, 0x00);
  66         if (body_size != expected_body_size) {
  67                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  68         }
  69
  70         in_ctl_code             = IVAL(inbody, 0x04);
  71         in_file_id_persistent   = BVAL(inbody, 0x08);
  72         in_file_id_volatile     = BVAL(inbody, 0x10);
  73         in_input_offset         = IVAL(inbody, 0x18);
  74         in_input_length         = IVAL(inbody, 0x1C);
  75         in_max_output_length    = IVAL(inbody, 0x2C);
  76         in_flags                = IVAL(inbody, 0x30);
  77
  78         if (in_input_offset != (SMB2_HDR_BODY + (body_size & 0xFFFFFFFE))) {
  79                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  80         }
  81
  82         if (in_input_length > req->in.vector[i+2].iov_len) {
  83                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  84         }
  85
  86         in_input_buffer.data = (uint8_t *)req->in.vector[i+2].iov_base;
  87         in_input_buffer.length = in_input_length;
  88
  89         if (req->compat_chain_fsp) {
  90                 /* skip check */
  91         } else if (in_file_id_persistent == UINT64_MAX &&
  92                    in_file_id_volatile == UINT64_MAX) {
  93                 /* without a handle */
  94         } else if (in_file_id_persistent != in_file_id_volatile) {
  95                 return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
  96         }
  97
  98         subreq = smbd_smb2_ioctl_send(req,
  99                                       req->sconn->smb2.event_ctx,
 100                                       req,
 101                                       in_ctl_code,
 102                                       in_file_id_volatile,
 103                                       in_input_buffer,
 104                                       in_max_output_length,
 105                                       in_flags);
 106         if (subreq == NULL) {
 107                 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 108         }
 109         tevent_req_set_callback(subreq, smbd_smb2_request_ioctl_done, req);
 110
 111         return smbd_smb2_request_pending_queue(req, subreq);
 112 }
 113
 114 static void smbd_smb2_request_ioctl_done(struct tevent_req *subreq)
 115 {
 116         struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
 117                                         struct smbd_smb2_request);
 118         const uint8_t *inbody;
 119         int i = req->current_idx;
 120         uint8_t *outhdr;
 121         DATA_BLOB outbody;
 122         DATA_BLOB outdyn;
 123         uint32_t in_ctl_code;
 124         uint64_t in_file_id_persistent;
 125         uint64_t in_file_id_volatile;
 126         uint32_t out_input_offset;
 127         uint32_t out_output_offset;
 128         DATA_BLOB out_output_buffer = data_blob_null;
 129         NTSTATUS status;
 130         NTSTATUS error; /* transport error */
 131
 132         status = smbd_smb2_ioctl_recv(subreq, req, &out_output_buffer);
 133
 134         DEBUG(10,("smbd_smb2_request_ioctl_done: smbd_smb2_ioctl_recv returned "
 135                 "%u status %s\n",
 136                 (unsigned int)out_output_buffer.length,
 137                 nt_errstr(status) ));
 138
 139         TALLOC_FREE(subreq);
 140         if (NT_STATUS_EQUAL(status, STATUS_BUFFER_OVERFLOW)) {
 141                 /* also ok */
 142         } else if (!NT_STATUS_IS_OK(status)) {
 143                 error = smbd_smb2_request_error(req, status);
 144                 if (!NT_STATUS_IS_OK(error)) {
 145                         smbd_server_connection_terminate(req->sconn,
 146                                                          nt_errstr(error));
 147                         return;
 148                 }
 149                 return;
 150         }
 151
 152         out_input_offset = SMB2_HDR_BODY + 0x30;
 153         out_output_offset = SMB2_HDR_BODY + 0x30;
 154
 155         inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
 156
 157         in_ctl_code             = IVAL(inbody, 0x04);
 158         in_file_id_persistent   = BVAL(inbody, 0x08);
 159         in_file_id_volatile     = BVAL(inbody, 0x10);
 160
 161         outhdr = (uint8_t *)req->out.vector[i].iov_base;
 162
 163         outbody = data_blob_talloc(req->out.vector, NULL, 0x30);
 164         if (outbody.data == NULL) {
 165                 error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 166                 if (!NT_STATUS_IS_OK(error)) {
 167                         smbd_server_connection_terminate(req->sconn,
 168                                                          nt_errstr(error));
 169                         return;
 170                 }
 171                 return;
 172         }
 173
 174         SSVAL(outbody.data, 0x00, 0x30 + 1);    /* struct size */
 175         SSVAL(outbody.data, 0x02, 0);           /* reserved */
 176         SIVAL(outbody.data, 0x04,
 177               in_ctl_code);                     /* ctl code */
 178         SBVAL(outbody.data, 0x08,
 179               in_file_id_persistent);           /* file id (persistent) */
 180         SBVAL(outbody.data, 0x10,
 181               in_file_id_volatile);             /* file id (volatile) */
 182         SIVAL(outbody.data, 0x18,
 183               out_input_offset);                /* input offset */
 184         SIVAL(outbody.data, 0x1C, 0);           /* input count */
 185         SIVAL(outbody.data, 0x20,
 186               out_output_offset);               /* output offset */
 187         SIVAL(outbody.data, 0x24,
 188               out_output_buffer.length);        /* output count */
 189         SIVAL(outbody.data, 0x28, 0);           /* flags */
 190         SIVAL(outbody.data, 0x2C, 0);           /* reserved */
 191
 192         /*
 193          * Note: Windows Vista and 2008 send back also the
 194          *       input from the request. But it was fixed in
 195          *       Windows 7.
 196          */
 197         outdyn = out_output_buffer;
 198
 199         error = smbd_smb2_request_done_ex(req, status, outbody, &outdyn,
 200                                           __location__);
 201         if (!NT_STATUS_IS_OK(error)) {
 202                 smbd_server_connection_terminate(req->sconn,
 203                                                  nt_errstr(error));
 204                 return;
 205         }
 206 }
 207
 208 struct smbd_smb2_ioctl_state {
 209         struct smbd_smb2_request *smb2req;
 210         struct smb_request *smbreq;
 211         files_struct *fsp;
 212         DATA_BLOB in_input;
 213         uint32_t in_max_output;
 214         DATA_BLOB out_output;
 215 };
 216
 217 static void smbd_smb2_ioctl_pipe_write_done(struct tevent_req *subreq);
 218 static void smbd_smb2_ioctl_pipe_read_done(struct tevent_req *subreq);
 219
 220 static struct tevent_req *smbd_smb2_ioctl_send(TALLOC_CTX *mem_ctx,
 221                                                struct tevent_context *ev,
 222                                                struct smbd_smb2_request *smb2req,
 223                                                uint32_t in_ctl_code,
 224                                                uint64_t in_file_id_volatile,
 225                                                DATA_BLOB in_input,
 226                                                uint32_t in_max_output,
 227                                                uint32_t in_flags)
 228 {
 229         struct tevent_req *req;
 230         struct smbd_smb2_ioctl_state *state;
 231         struct smb_request *smbreq;
 232         files_struct *fsp = NULL;
 233         struct tevent_req *subreq;
 234
 235         req = tevent_req_create(mem_ctx, &state,
 236                                 struct smbd_smb2_ioctl_state);
 237         if (req == NULL) {
 238                 return NULL;
 239         }
 240         state->smb2req = smb2req;
 241         state->smbreq = NULL;
 242         state->fsp = NULL;
 243         state->in_input = in_input;
 244         state->in_max_output = in_max_output;
 245         state->out_output = data_blob_null;
 246
 247         DEBUG(10,("smbd_smb2_ioctl: file_id[0x%016llX]\n",
 248                   (unsigned long long)in_file_id_volatile));
 249
 250         smbreq = smbd_smb2_fake_smb_request(smb2req);
 251         if (tevent_req_nomem(smbreq, req)) {
 252                 return tevent_req_post(req, ev);
 253         }
 254         state->smbreq = smbreq;
 255
 256         if (in_file_id_volatile != UINT64_MAX) {
 257                 fsp = file_fsp(smbreq, (uint16_t)in_file_id_volatile);
 258                 if (fsp == NULL) {
 259                         tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 260                         return tevent_req_post(req, ev);
 261                 }
 262                 if (smbreq->conn != fsp->conn) {
 263                         tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 264                         return tevent_req_post(req, ev);
 265                 }
 266                 if (smb2req->session->vuid != fsp->vuid) {
 267                         tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 268                         return tevent_req_post(req, ev);
 269                 }
 270                 state->fsp = fsp;
 271         }
 272
 273         switch (in_ctl_code) {
 274         case 0x00060194: /* FSCTL_DFS_GET_REFERRALS */
 275         {
 276                 uint16_t in_max_referral_level;
 277                 DATA_BLOB in_file_name_buffer;
 278                 char *in_file_name_string;
 279                 size_t in_file_name_string_size;
 280                 bool ok;
 281                 bool overflow = false;
 282                 NTSTATUS status;
 283                 int dfs_size;
 284                 char *dfs_data = NULL;
 285
 286                 if (!IS_IPC(smbreq->conn)) {
 287                         tevent_req_nterror(req, NT_STATUS_INVALID_DEVICE_REQUEST);
 288                         return tevent_req_post(req, ev);
 289                 }
 290
 291                 if (!lp_host_msdfs()) {
 292                         tevent_req_nterror(req, NT_STATUS_FS_DRIVER_REQUIRED);
 293                         return tevent_req_post(req, ev);
 294                 }
 295
 296                 if (in_input.length < (2 + 2)) {
 297                         tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 298                         return tevent_req_post(req, ev);
 299                 }
 300
 301                 in_max_referral_level = SVAL(in_input.data, 0);
 302                 in_file_name_buffer.data = in_input.data + 2;
 303                 in_file_name_buffer.length = in_input.length - 2;
 304
 305                 ok = convert_string_talloc(state, CH_UTF16, CH_UNIX,
 306                                            in_file_name_buffer.data,
 307                                            in_file_name_buffer.length,
 308                                            &in_file_name_string,
 309                                            &in_file_name_string_size);
 310                 if (!ok) {
 311                         tevent_req_nterror(req, NT_STATUS_ILLEGAL_CHARACTER);
 312                         return tevent_req_post(req, ev);
 313                 }
 314
 315                 dfs_size = setup_dfs_referral(smbreq->conn,
 316                                               in_file_name_string,
 317                                               in_max_referral_level,
 318                                               &dfs_data, &status);
 319                 if (dfs_size < 0) {
 320                         tevent_req_nterror(req, status);
 321                         return tevent_req_post(req, ev);
 322                 }
 323
 324                 if (dfs_size > in_max_output) {
 325                         /*
 326                          * TODO: we need a testsuite for this
 327                          */
 328                         overflow = true;
 329                         dfs_size = in_max_output;
 330                 }
 331
 332                 state->out_output = data_blob_talloc(state,
 333                                                      (uint8_t *)dfs_data,
 334                                                      dfs_size);
 335                 SAFE_FREE(dfs_data);
 336                 if (dfs_size > 0 &&
 337                     tevent_req_nomem(state->out_output.data, req)) {
 338                         return tevent_req_post(req, ev);
 339                 }
 340
 341                 if (overflow) {
 342                         tevent_req_nterror(req, STATUS_BUFFER_OVERFLOW);
 343                 } else {
 344                         tevent_req_done(req);
 345                 }
 346                 return tevent_req_post(req, ev);
 347         }
 348         case 0x0011C017: /* FSCTL_PIPE_TRANSCEIVE */
 349
 350                 if (!IS_IPC(smbreq->conn)) {
 351                         tevent_req_nterror(req, NT_STATUS_NOT_SUPPORTED);
 352                         return tevent_req_post(req, ev);
 353                 }
 354
 355                 if (fsp == NULL) {
 356                         tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 357                         return tevent_req_post(req, ev);
 358                 }
 359
 360                 if (!fsp_is_np(fsp)) {
 361                         tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 362                         return tevent_req_post(req, ev);
 363                 }
 364
 365                 DEBUG(10,("smbd_smb2_ioctl_send: np_write_send of size %u\n",
 366                         (unsigned int)in_input.length ));
 367
 368                 subreq = np_write_send(state, ev,
 369                                        fsp->fake_file_handle,
 370                                        in_input.data,
 371                                        in_input.length);
 372                 if (tevent_req_nomem(subreq, req)) {
 373                         return tevent_req_post(req, ev);
 374                 }
 375                 tevent_req_set_callback(subreq,
 376                                         smbd_smb2_ioctl_pipe_write_done,
 377                                         req);
 378                 return req;
 379
 380         default:
 381                 if (IS_IPC(smbreq->conn)) {
 382                         tevent_req_nterror(req, NT_STATUS_FS_DRIVER_REQUIRED);
 383                         return tevent_req_post(req, ev);
 384                 }
 385                 tevent_req_nterror(req, NT_STATUS_INVALID_DEVICE_REQUEST);
 386                 return tevent_req_post(req, ev);
 387         }
 388
 389         tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
 390         return tevent_req_post(req, ev);
 391 }
 392
 393 static void smbd_smb2_ioctl_pipe_write_done(struct tevent_req *subreq)
 394 {
 395         struct tevent_req *req = tevent_req_callback_data(subreq,
 396                                  struct tevent_req);
 397         struct smbd_smb2_ioctl_state *state = tevent_req_data(req,
 398                                               struct smbd_smb2_ioctl_state);
 399         NTSTATUS status;
 400         ssize_t nwritten = -1;
 401
 402         status = np_write_recv(subreq, &nwritten);
 403
 404         DEBUG(10,("smbd_smb2_ioctl_pipe_write_done: received %ld\n",
 405                 (long int)nwritten ));
 406
 407         TALLOC_FREE(subreq);
 408         if (!NT_STATUS_IS_OK(status)) {
 409                 tevent_req_nterror(req, status);
 410                 return;
 411         }
 412
 413         if (nwritten != state->in_input.length) {
 414                 tevent_req_nterror(req, NT_STATUS_PIPE_NOT_AVAILABLE);
 415                 return;
 416         }
 417
 418         state->out_output = data_blob_talloc(state, NULL, state->in_max_output);
 419         if (state->in_max_output > 0 &&
 420             tevent_req_nomem(state->out_output.data, req)) {
 421                 return;
 422         }
 423
 424         DEBUG(10,("smbd_smb2_ioctl_pipe_write_done: issuing np_read_send "
 425                 "of size %u\n",
 426                 (unsigned int)state->out_output.length ));
 427
 428         TALLOC_FREE(subreq);
 429         subreq = np_read_send(state->smbreq->conn,
 430                               state->smb2req->sconn->smb2.event_ctx,
 431                               state->fsp->fake_file_handle,
 432                               state->out_output.data,
 433                               state->out_output.length);
 434         if (tevent_req_nomem(subreq, req)) {
 435                 return;
 436         }
 437         tevent_req_set_callback(subreq, smbd_smb2_ioctl_pipe_read_done, req);
 438 }
 439
 440 static void smbd_smb2_ioctl_pipe_read_done(struct tevent_req *subreq)
 441 {
 442         struct tevent_req *req = tevent_req_callback_data(subreq,
 443                                  struct tevent_req);
 444         struct smbd_smb2_ioctl_state *state = tevent_req_data(req,
 445                                               struct smbd_smb2_ioctl_state);
 446         NTSTATUS status;
 447         ssize_t nread = -1;
 448         bool is_data_outstanding = false;
 449
 450         status = np_read_recv(subreq, &nread, &is_data_outstanding);
 451
 452         DEBUG(10,("smbd_smb2_ioctl_pipe_read_done: np_read_recv nread = %d "
 453                  "is_data_outstanding = %d, status = %s\n",
 454                 (int)nread,
 455                 (int)is_data_outstanding,
 456                 nt_errstr(status) ));
 457
 458         TALLOC_FREE(subreq);
 459         if (!NT_STATUS_IS_OK(status)) {
 460                 tevent_req_nterror(req, status);
 461                 return;
 462         }
 463
 464         state->out_output.length = nread;
 465
 466         tevent_req_done(req);
 467 }
 468
 469 static NTSTATUS smbd_smb2_ioctl_recv(struct tevent_req *req,
 470                                      TALLOC_CTX *mem_ctx,
 471                                      DATA_BLOB *out_output)
 472 {
 473         NTSTATUS status = NT_STATUS_OK;
 474         struct smbd_smb2_ioctl_state *state = tevent_req_data(req,
 475                                               struct smbd_smb2_ioctl_state);
 476
 477         if (tevent_req_is_nterror(req, &status)) {
 478                 if (!NT_STATUS_EQUAL(status, STATUS_BUFFER_OVERFLOW)) {
 479                         tevent_req_received(req);
 480                         return status;
 481                 }
 482         }
 483
 484         *out_output = state->out_output;
 485         talloc_steal(mem_ctx, out_output->data);
 486
 487         tevent_req_received(req);
 488         return status;
 489 }