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 "../source4/libcli/smb2/smb2_constants.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->conn->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         if (tevent_req_is_in_progress(subreq)) {
 109                 return smbd_smb2_request_pending_queue(req);
 110         }
 111
 112         return NT_STATUS_OK;
 113 }
 114
 115 static void smbd_smb2_request_ioctl_done(struct tevent_req *subreq)
 116 {
 117         struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
 118                                         struct smbd_smb2_request);
 119         const uint8_t *inbody;
 120         int i = req->current_idx;
 121         uint8_t *outhdr;
 122         DATA_BLOB outbody;
 123         DATA_BLOB outdyn;
 124         uint32_t in_ctl_code;
 125         uint64_t in_file_id_persistent;
 126         uint64_t in_file_id_volatile;
 127         uint32_t out_input_offset;
 128         uint32_t out_output_offset;
 129         DATA_BLOB out_output_buffer;
 130         NTSTATUS status;
 131         NTSTATUS error; /* transport error */
 132
 133         status = smbd_smb2_ioctl_recv(subreq, req, &out_output_buffer);
 134         TALLOC_FREE(subreq);
 135         if (NT_STATUS_EQUAL(status, STATUS_BUFFER_OVERFLOW)) {
 136                 /* also ok */
 137         } else if (!NT_STATUS_IS_OK(status)) {
 138                 error = smbd_smb2_request_error(req, status);
 139                 if (!NT_STATUS_IS_OK(error)) {
 140                         smbd_server_connection_terminate(req->conn,
 141                                                          nt_errstr(error));
 142                         return;
 143                 }
 144                 return;
 145         }
 146
 147         out_input_offset = SMB2_HDR_BODY + 0x30;
 148         out_output_offset = SMB2_HDR_BODY + 0x30;
 149
 150         inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
 151
 152         in_ctl_code             = IVAL(inbody, 0x04);
 153         in_file_id_persistent   = BVAL(inbody, 0x08);
 154         in_file_id_volatile     = BVAL(inbody, 0x10);
 155
 156         outhdr = (uint8_t *)req->out.vector[i].iov_base;
 157
 158         outbody = data_blob_talloc(req->out.vector, NULL, 0x30);
 159         if (outbody.data == NULL) {
 160                 error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 161                 if (!NT_STATUS_IS_OK(error)) {
 162                         smbd_server_connection_terminate(req->conn,
 163                                                          nt_errstr(error));
 164                         return;
 165                 }
 166                 return;
 167         }
 168
 169         SSVAL(outbody.data, 0x00, 0x30 + 1);    /* struct size */
 170         SSVAL(outbody.data, 0x02, 0);           /* reserved */
 171         SIVAL(outbody.data, 0x04,
 172               in_ctl_code);                     /* ctl code */
 173         SBVAL(outbody.data, 0x08,
 174               in_file_id_persistent);           /* file id (persistent) */
 175         SBVAL(outbody.data, 0x10,
 176               in_file_id_volatile);             /* file id (volatile) */
 177         SIVAL(outbody.data, 0x18,
 178               out_input_offset);                /* input offset */
 179         SIVAL(outbody.data, 0x1C, 0);           /* input count */
 180         SIVAL(outbody.data, 0x20,
 181               out_output_offset);               /* output offset */
 182         SIVAL(outbody.data, 0x24,
 183               out_output_buffer.length);        /* output count */
 184         SIVAL(outbody.data, 0x28, 0);           /* flags */
 185         SIVAL(outbody.data, 0x2C, 0);           /* reserved */
 186
 187         /*
 188          * Note: Windows Vista and 2008 send back also the
 189          *       input from the request. But it was fixed in
 190          *       Windows 7.
 191          */
 192         outdyn = out_output_buffer;
 193
 194         error = smbd_smb2_request_done_ex(req, status, outbody, &outdyn,
 195                                           __location__);
 196         if (!NT_STATUS_IS_OK(error)) {
 197                 smbd_server_connection_terminate(req->conn,
 198                                                  nt_errstr(error));
 199                 return;
 200         }
 201 }
 202
 203 struct smbd_smb2_ioctl_state {
 204         struct smbd_smb2_request *smb2req;
 205         struct smb_request *smbreq;
 206         files_struct *fsp;
 207         DATA_BLOB in_input;
 208         uint32_t in_max_output;
 209         DATA_BLOB out_output;
 210 };
 211
 212 static void smbd_smb2_ioctl_pipe_write_done(struct tevent_req *subreq);
 213 static void smbd_smb2_ioctl_pipe_read_done(struct tevent_req *subreq);
 214
 215 static struct tevent_req *smbd_smb2_ioctl_send(TALLOC_CTX *mem_ctx,
 216                                                struct tevent_context *ev,
 217                                                struct smbd_smb2_request *smb2req,
 218                                                uint32_t in_ctl_code,
 219                                                uint64_t in_file_id_volatile,
 220                                                DATA_BLOB in_input,
 221                                                uint32_t in_max_output,
 222                                                uint32_t in_flags)
 223 {
 224         struct tevent_req *req;
 225         struct smbd_smb2_ioctl_state *state;
 226         struct smb_request *smbreq;
 227         files_struct *fsp = NULL;
 228         struct tevent_req *subreq;
 229
 230         req = tevent_req_create(mem_ctx, &state,
 231                                 struct smbd_smb2_ioctl_state);
 232         if (req == NULL) {
 233                 return NULL;
 234         }
 235         state->smb2req = smb2req;
 236         state->smbreq = NULL;
 237         state->fsp = NULL;
 238         state->in_input = in_input;
 239         state->in_max_output = in_max_output;
 240         state->out_output = data_blob_null;
 241
 242         DEBUG(10,("smbd_smb2_ioctl: file_id[0x%016llX]\n",
 243                   (unsigned long long)in_file_id_volatile));
 244
 245         smbreq = smbd_smb2_fake_smb_request(smb2req);
 246         if (tevent_req_nomem(smbreq, req)) {
 247                 return tevent_req_post(req, ev);
 248         }
 249         state->smbreq = smbreq;
 250
 251         if (in_file_id_volatile != UINT64_MAX) {
 252                 fsp = file_fsp(smbreq, (uint16_t)in_file_id_volatile);
 253                 if (fsp == NULL) {
 254                         tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 255                         return tevent_req_post(req, ev);
 256                 }
 257                 if (smbreq->conn != fsp->conn) {
 258                         tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 259                         return tevent_req_post(req, ev);
 260                 }
 261                 if (smb2req->session->vuid != fsp->vuid) {
 262                         tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 263                         return tevent_req_post(req, ev);
 264                 }
 265                 state->fsp = fsp;
 266         }
 267
 268         switch (in_ctl_code) {
 269         case 0x00060194: /* FSCTL_DFS_GET_REFERRALS */
 270         {
 271                 uint16_t in_max_referral_level;
 272                 DATA_BLOB in_file_name_buffer;
 273                 char *in_file_name_string;
 274                 size_t in_file_name_string_size;
 275                 bool ok;
 276                 bool overflow = false;
 277                 NTSTATUS status;
 278                 int dfs_size;
 279                 char *dfs_data = NULL;
 280
 281                 if (!IS_IPC(smbreq->conn)) {
 282                         tevent_req_nterror(req, NT_STATUS_INVALID_DEVICE_REQUEST);
 283                         return tevent_req_post(req, ev);
 284                 }
 285
 286                 if (!lp_host_msdfs()) {
 287                         tevent_req_nterror(req, NT_STATUS_FS_DRIVER_REQUIRED);
 288                         return tevent_req_post(req, ev);
 289                 }
 290
 291                 if (in_input.length < (2 + 2)) {
 292                         tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 293                         return tevent_req_post(req, ev);
 294                 }
 295
 296                 in_max_referral_level = SVAL(in_input.data, 0);
 297                 in_file_name_buffer.data = in_input.data + 2;
 298                 in_file_name_buffer.length = in_input.length - 2;
 299
 300                 ok = convert_string_talloc(state, CH_UTF16, CH_UNIX,
 301                                            in_file_name_buffer.data,
 302                                            in_file_name_buffer.length,
 303                                            &in_file_name_string,
 304                                            &in_file_name_string_size, false);
 305                 if (!ok) {
 306                         tevent_req_nterror(req, NT_STATUS_ILLEGAL_CHARACTER);
 307                         return tevent_req_post(req, ev);
 308                 }
 309
 310                 dfs_size = setup_dfs_referral(smbreq->conn,
 311                                               in_file_name_string,
 312                                               in_max_referral_level,
 313                                               &dfs_data, &status);
 314                 if (dfs_size < 0) {
 315                         tevent_req_nterror(req, status);
 316                         return tevent_req_post(req, ev);
 317                 }
 318
 319                 if (dfs_size > in_max_output) {
 320                         /*
 321                          * TODO: we need a testsuite for this
 322                          */
 323                         overflow = true;
 324                         dfs_size = in_max_output;
 325                 }
 326
 327                 state->out_output = data_blob_talloc(state,
 328                                                      (uint8_t *)dfs_data,
 329                                                      dfs_size);
 330                 SAFE_FREE(dfs_data);
 331                 if (dfs_size > 0 &&
 332                     tevent_req_nomem(state->out_output.data, req)) {
 333                         return tevent_req_post(req, ev);
 334                 }
 335
 336                 if (overflow) {
 337                         tevent_req_nterror(req, STATUS_BUFFER_OVERFLOW);
 338                 } else {
 339                         tevent_req_done(req);
 340                 }
 341                 return tevent_req_post(req, ev);
 342         }
 343         case 0x0011C017: /* FSCTL_PIPE_TRANSCEIVE */
 344
 345                 if (!IS_IPC(smbreq->conn)) {
 346                         tevent_req_nterror(req, NT_STATUS_NOT_SUPPORTED);
 347                         return tevent_req_post(req, ev);
 348                 }
 349
 350                 if (fsp == NULL) {
 351                         tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 352                         return tevent_req_post(req, ev);
 353                 }
 354
 355                 if (!fsp_is_np(fsp)) {
 356                         tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 357                         return tevent_req_post(req, ev);
 358                 }
 359
 360                 subreq = np_write_send(state, ev,
 361                                        fsp->fake_file_handle,
 362                                        in_input.data,
 363                                        in_input.length);
 364                 if (tevent_req_nomem(subreq, req)) {
 365                         return tevent_req_post(req, ev);
 366                 }
 367                 tevent_req_set_callback(subreq,
 368                                         smbd_smb2_ioctl_pipe_write_done,
 369                                         req);
 370                 return req;
 371
 372         default:
 373                 if (IS_IPC(smbreq->conn)) {
 374                         tevent_req_nterror(req, NT_STATUS_FS_DRIVER_REQUIRED);
 375                         return tevent_req_post(req, ev);
 376                 }
 377                 tevent_req_nterror(req, NT_STATUS_INVALID_DEVICE_REQUEST);
 378                 return tevent_req_post(req, ev);
 379         }
 380
 381         tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
 382         return tevent_req_post(req, ev);
 383 }
 384
 385 static void smbd_smb2_ioctl_pipe_write_done(struct tevent_req *subreq)
 386 {
 387         struct tevent_req *req = tevent_req_callback_data(subreq,
 388                                  struct tevent_req);
 389         struct smbd_smb2_ioctl_state *state = tevent_req_data(req,
 390                                               struct smbd_smb2_ioctl_state);
 391         NTSTATUS status;
 392         ssize_t nwritten = -1;
 393
 394         status = np_write_recv(subreq, &nwritten);
 395         TALLOC_FREE(subreq);
 396         if (!NT_STATUS_IS_OK(status)) {
 397                 tevent_req_nterror(req, status);
 398                 return;
 399         }
 400
 401         if (nwritten != state->in_input.length) {
 402                 tevent_req_nterror(req, NT_STATUS_PIPE_NOT_AVAILABLE);
 403                 return;
 404         }
 405
 406         state->out_output = data_blob_talloc(state, NULL, state->in_max_output);
 407         if (state->in_max_output > 0 &&
 408             tevent_req_nomem(state->out_output.data, req)) {
 409                 return;
 410         }
 411
 412         subreq = np_read_send(state->smbreq->conn,
 413                               state->smb2req->conn->smb2.event_ctx,
 414                               state->fsp->fake_file_handle,
 415                               state->out_output.data,
 416                               state->out_output.length);
 417         if (tevent_req_nomem(subreq, req)) {
 418                 return;
 419         }
 420         tevent_req_set_callback(subreq, smbd_smb2_ioctl_pipe_read_done, req);
 421 }
 422
 423 static void smbd_smb2_ioctl_pipe_read_done(struct tevent_req *subreq)
 424 {
 425         struct tevent_req *req = tevent_req_callback_data(subreq,
 426                                  struct tevent_req);
 427         struct smbd_smb2_ioctl_state *state = tevent_req_data(req,
 428                                               struct smbd_smb2_ioctl_state);
 429         NTSTATUS status;
 430         ssize_t nread;
 431         bool is_data_outstanding;
 432
 433         status = np_read_recv(subreq, &nread, &is_data_outstanding);
 434         TALLOC_FREE(subreq);
 435         if (!NT_STATUS_IS_OK(status)) {
 436                 tevent_req_nterror(req, status);
 437                 return;
 438         }
 439
 440         state->out_output.length = nread;
 441
 442         tevent_req_done(req);
 443 }
 444
 445 static NTSTATUS smbd_smb2_ioctl_recv(struct tevent_req *req,
 446                                      TALLOC_CTX *mem_ctx,
 447                                      DATA_BLOB *out_output)
 448 {
 449         NTSTATUS status;
 450         struct smbd_smb2_ioctl_state *state = tevent_req_data(req,
 451                                               struct smbd_smb2_ioctl_state);
 452
 453         if (tevent_req_is_nterror(req, &status)) {
 454                 if (!NT_STATUS_EQUAL(status, STATUS_BUFFER_OVERFLOW)) {
 455                         tevent_req_received(req);
 456                         return status;
 457                 }
 458         }
 459
 460         *out_output = state->out_output;
 461         talloc_steal(mem_ctx, out_output->data);
 462
 463         tevent_req_received(req);
 464         return status;
 465 }