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 != 0) {
  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         TALLOC_FREE(subreq);
 131         if (NT_STATUS_EQUAL(status, STATUS_BUFFER_OVERFLOW)) {
 132                 /* also ok */
 133         } else if (!NT_STATUS_IS_OK(status)) {
 134                 error = smbd_smb2_request_error(req, status);
 135                 if (!NT_STATUS_IS_OK(error)) {
 136                         smbd_server_connection_terminate(req->sconn,
 137                                                          nt_errstr(error));
 138                         return;
 139                 }
 140                 return;
 141         }
 142
 143         out_input_offset = SMB2_HDR_BODY + 0x30;
 144         out_output_offset = SMB2_HDR_BODY + 0x30;
 145
 146         inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
 147
 148         in_ctl_code             = IVAL(inbody, 0x04);
 149         in_file_id_persistent   = BVAL(inbody, 0x08);
 150         in_file_id_volatile     = BVAL(inbody, 0x10);
 151
 152         outhdr = (uint8_t *)req->out.vector[i].iov_base;
 153
 154         outbody = data_blob_talloc(req->out.vector, NULL, 0x30);
 155         if (outbody.data == NULL) {
 156                 error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 157                 if (!NT_STATUS_IS_OK(error)) {
 158                         smbd_server_connection_terminate(req->sconn,
 159                                                          nt_errstr(error));
 160                         return;
 161                 }
 162                 return;
 163         }
 164
 165         SSVAL(outbody.data, 0x00, 0x30 + 1);    /* struct size */
 166         SSVAL(outbody.data, 0x02, 0);           /* reserved */
 167         SIVAL(outbody.data, 0x04,
 168               in_ctl_code);                     /* ctl code */
 169         SBVAL(outbody.data, 0x08,
 170               in_file_id_persistent);           /* file id (persistent) */
 171         SBVAL(outbody.data, 0x10,
 172               in_file_id_volatile);             /* file id (volatile) */
 173         SIVAL(outbody.data, 0x18,
 174               out_input_offset);                /* input offset */
 175         SIVAL(outbody.data, 0x1C, 0);           /* input count */
 176         SIVAL(outbody.data, 0x20,
 177               out_output_offset);               /* output offset */
 178         SIVAL(outbody.data, 0x24,
 179               out_output_buffer.length);        /* output count */
 180         SIVAL(outbody.data, 0x28, 0);           /* flags */
 181         SIVAL(outbody.data, 0x2C, 0);           /* reserved */
 182
 183         /*
 184          * Note: Windows Vista and 2008 send back also the
 185          *       input from the request. But it was fixed in
 186          *       Windows 7.
 187          */
 188         outdyn = out_output_buffer;
 189
 190         error = smbd_smb2_request_done_ex(req, status, outbody, &outdyn,
 191                                           __location__);
 192         if (!NT_STATUS_IS_OK(error)) {
 193                 smbd_server_connection_terminate(req->sconn,
 194                                                  nt_errstr(error));
 195                 return;
 196         }
 197 }
 198
 199 struct smbd_smb2_ioctl_state {
 200         struct smbd_smb2_request *smb2req;
 201         struct smb_request *smbreq;
 202         files_struct *fsp;
 203         DATA_BLOB in_input;
 204         uint32_t in_max_output;
 205         DATA_BLOB out_output;
 206 };
 207
 208 static void smbd_smb2_ioctl_pipe_write_done(struct tevent_req *subreq);
 209 static void smbd_smb2_ioctl_pipe_read_done(struct tevent_req *subreq);
 210
 211 static struct tevent_req *smbd_smb2_ioctl_send(TALLOC_CTX *mem_ctx,
 212                                                struct tevent_context *ev,
 213                                                struct smbd_smb2_request *smb2req,
 214                                                uint32_t in_ctl_code,
 215                                                uint64_t in_file_id_volatile,
 216                                                DATA_BLOB in_input,
 217                                                uint32_t in_max_output,
 218                                                uint32_t in_flags)
 219 {
 220         struct tevent_req *req;
 221         struct smbd_smb2_ioctl_state *state;
 222         struct smb_request *smbreq;
 223         files_struct *fsp = NULL;
 224         struct tevent_req *subreq;
 225
 226         req = tevent_req_create(mem_ctx, &state,
 227                                 struct smbd_smb2_ioctl_state);
 228         if (req == NULL) {
 229                 return NULL;
 230         }
 231         state->smb2req = smb2req;
 232         state->smbreq = NULL;
 233         state->fsp = NULL;
 234         state->in_input = in_input;
 235         state->in_max_output = in_max_output;
 236         state->out_output = data_blob_null;
 237
 238         DEBUG(10,("smbd_smb2_ioctl: file_id[0x%016llX]\n",
 239                   (unsigned long long)in_file_id_volatile));
 240
 241         smbreq = smbd_smb2_fake_smb_request(smb2req);
 242         if (tevent_req_nomem(smbreq, req)) {
 243                 return tevent_req_post(req, ev);
 244         }
 245         state->smbreq = smbreq;
 246
 247         if (in_file_id_volatile != UINT64_MAX) {
 248                 fsp = file_fsp(smbreq, (uint16_t)in_file_id_volatile);
 249                 if (fsp == NULL) {
 250                         tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 251                         return tevent_req_post(req, ev);
 252                 }
 253                 if (smbreq->conn != fsp->conn) {
 254                         tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 255                         return tevent_req_post(req, ev);
 256                 }
 257                 if (smb2req->session->vuid != fsp->vuid) {
 258                         tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 259                         return tevent_req_post(req, ev);
 260                 }
 261                 state->fsp = fsp;
 262         }
 263
 264         switch (in_ctl_code) {
 265         case 0x00060194: /* FSCTL_DFS_GET_REFERRALS */
 266         {
 267                 uint16_t in_max_referral_level;
 268                 DATA_BLOB in_file_name_buffer;
 269                 char *in_file_name_string;
 270                 size_t in_file_name_string_size;
 271                 bool ok;
 272                 bool overflow = false;
 273                 NTSTATUS status;
 274                 int dfs_size;
 275                 char *dfs_data = NULL;
 276
 277                 if (!IS_IPC(smbreq->conn)) {
 278                         tevent_req_nterror(req, NT_STATUS_INVALID_DEVICE_REQUEST);
 279                         return tevent_req_post(req, ev);
 280                 }
 281
 282                 if (!lp_host_msdfs()) {
 283                         tevent_req_nterror(req, NT_STATUS_FS_DRIVER_REQUIRED);
 284                         return tevent_req_post(req, ev);
 285                 }
 286
 287                 if (in_input.length < (2 + 2)) {
 288                         tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 289                         return tevent_req_post(req, ev);
 290                 }
 291
 292                 in_max_referral_level = SVAL(in_input.data, 0);
 293                 in_file_name_buffer.data = in_input.data + 2;
 294                 in_file_name_buffer.length = in_input.length - 2;
 295
 296                 ok = convert_string_talloc(state, CH_UTF16, CH_UNIX,
 297                                            in_file_name_buffer.data,
 298                                            in_file_name_buffer.length,
 299                                            &in_file_name_string,
 300                                            &in_file_name_string_size, false);
 301                 if (!ok) {
 302                         tevent_req_nterror(req, NT_STATUS_ILLEGAL_CHARACTER);
 303                         return tevent_req_post(req, ev);
 304                 }
 305
 306                 dfs_size = setup_dfs_referral(smbreq->conn,
 307                                               in_file_name_string,
 308                                               in_max_referral_level,
 309                                               &dfs_data, &status);
 310                 if (dfs_size < 0) {
 311                         tevent_req_nterror(req, status);
 312                         return tevent_req_post(req, ev);
 313                 }
 314
 315                 if (dfs_size > in_max_output) {
 316                         /*
 317                          * TODO: we need a testsuite for this
 318                          */
 319                         overflow = true;
 320                         dfs_size = in_max_output;
 321                 }
 322
 323                 state->out_output = data_blob_talloc(state,
 324                                                      (uint8_t *)dfs_data,
 325                                                      dfs_size);
 326                 SAFE_FREE(dfs_data);
 327                 if (dfs_size > 0 &&
 328                     tevent_req_nomem(state->out_output.data, req)) {
 329                         return tevent_req_post(req, ev);
 330                 }
 331
 332                 if (overflow) {
 333                         tevent_req_nterror(req, STATUS_BUFFER_OVERFLOW);
 334                 } else {
 335                         tevent_req_done(req);
 336                 }
 337                 return tevent_req_post(req, ev);
 338         }
 339         case 0x0011C017: /* FSCTL_PIPE_TRANSCEIVE */
 340
 341                 if (!IS_IPC(smbreq->conn)) {
 342                         tevent_req_nterror(req, NT_STATUS_NOT_SUPPORTED);
 343                         return tevent_req_post(req, ev);
 344                 }
 345
 346                 if (fsp == NULL) {
 347                         tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 348                         return tevent_req_post(req, ev);
 349                 }
 350
 351                 if (!fsp_is_np(fsp)) {
 352                         tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 353                         return tevent_req_post(req, ev);
 354                 }
 355
 356                 subreq = np_write_send(state, ev,
 357                                        fsp->fake_file_handle,
 358                                        in_input.data,
 359                                        in_input.length);
 360                 if (tevent_req_nomem(subreq, req)) {
 361                         return tevent_req_post(req, ev);
 362                 }
 363                 tevent_req_set_callback(subreq,
 364                                         smbd_smb2_ioctl_pipe_write_done,
 365                                         req);
 366                 return req;
 367
 368         default:
 369                 if (IS_IPC(smbreq->conn)) {
 370                         tevent_req_nterror(req, NT_STATUS_FS_DRIVER_REQUIRED);
 371                         return tevent_req_post(req, ev);
 372                 }
 373                 tevent_req_nterror(req, NT_STATUS_INVALID_DEVICE_REQUEST);
 374                 return tevent_req_post(req, ev);
 375         }
 376
 377         tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
 378         return tevent_req_post(req, ev);
 379 }
 380
 381 static void smbd_smb2_ioctl_pipe_write_done(struct tevent_req *subreq)
 382 {
 383         struct tevent_req *req = tevent_req_callback_data(subreq,
 384                                  struct tevent_req);
 385         struct smbd_smb2_ioctl_state *state = tevent_req_data(req,
 386                                               struct smbd_smb2_ioctl_state);
 387         NTSTATUS status;
 388         ssize_t nwritten = -1;
 389
 390         status = np_write_recv(subreq, &nwritten);
 391         TALLOC_FREE(subreq);
 392         if (!NT_STATUS_IS_OK(status)) {
 393                 tevent_req_nterror(req, status);
 394                 return;
 395         }
 396
 397         if (nwritten != state->in_input.length) {
 398                 tevent_req_nterror(req, NT_STATUS_PIPE_NOT_AVAILABLE);
 399                 return;
 400         }
 401
 402         state->out_output = data_blob_talloc(state, NULL, state->in_max_output);
 403         if (state->in_max_output > 0 &&
 404             tevent_req_nomem(state->out_output.data, req)) {
 405                 return;
 406         }
 407
 408         subreq = np_read_send(state->smbreq->conn,
 409                               state->smb2req->sconn->smb2.event_ctx,
 410                               state->fsp->fake_file_handle,
 411                               state->out_output.data,
 412                               state->out_output.length);
 413         if (tevent_req_nomem(subreq, req)) {
 414                 return;
 415         }
 416         tevent_req_set_callback(subreq, smbd_smb2_ioctl_pipe_read_done, req);
 417 }
 418
 419 static void smbd_smb2_ioctl_pipe_read_done(struct tevent_req *subreq)
 420 {
 421         struct tevent_req *req = tevent_req_callback_data(subreq,
 422                                  struct tevent_req);
 423         struct smbd_smb2_ioctl_state *state = tevent_req_data(req,
 424                                               struct smbd_smb2_ioctl_state);
 425         NTSTATUS status;
 426         ssize_t nread;
 427         bool is_data_outstanding;
 428
 429         status = np_read_recv(subreq, &nread, &is_data_outstanding);
 430         TALLOC_FREE(subreq);
 431         if (!NT_STATUS_IS_OK(status)) {
 432                 tevent_req_nterror(req, status);
 433                 return;
 434         }
 435
 436         state->out_output.length = nread;
 437
 438         tevent_req_done(req);
 439 }
 440
 441 static NTSTATUS smbd_smb2_ioctl_recv(struct tevent_req *req,
 442                                      TALLOC_CTX *mem_ctx,
 443                                      DATA_BLOB *out_output)
 444 {
 445         NTSTATUS status;
 446         struct smbd_smb2_ioctl_state *state = tevent_req_data(req,
 447                                               struct smbd_smb2_ioctl_state);
 448
 449         if (tevent_req_is_nterror(req, &status)) {
 450                 if (!NT_STATUS_EQUAL(status, STATUS_BUFFER_OVERFLOW)) {
 451                         tevent_req_received(req);
 452                         return status;
 453                 }
 454         }
 455
 456         *out_output = state->out_output;
 457         talloc_steal(mem_ctx, out_output->data);
 458
 459         tevent_req_received(req);
 460         return status;
 461 }