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 (in_file_id_persistent == UINT64_MAX &&
  87             in_file_id_volatile == UINT64_MAX) {
  88                 /* without a handle */
  89         } else if (in_file_id_persistent != 0) {
  90                 return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
  91         }
  92
  93         subreq = smbd_smb2_ioctl_send(req,
  94                                       req->conn->smb2.event_ctx,
  95                                       req,
  96                                       in_ctl_code,
  97                                       in_file_id_volatile,
  98                                       in_input_buffer,
  99                                       in_max_output_length,
 100                                       in_flags);
 101         if (subreq == NULL) {
 102                 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 103         }
 104         tevent_req_set_callback(subreq, smbd_smb2_request_ioctl_done, req);
 105         return NT_STATUS_OK;
 106 }
 107
 108 static void smbd_smb2_request_ioctl_done(struct tevent_req *subreq)
 109 {
 110         struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
 111                                         struct smbd_smb2_request);
 112         int i = req->current_idx;
 113         uint8_t *outhdr;
 114         DATA_BLOB outbody;
 115         DATA_BLOB outdyn;
 116         uint32_t out_output_offset;
 117         DATA_BLOB out_output_buffer;
 118         NTSTATUS status;
 119         NTSTATUS error; /* transport error */
 120
 121         status = smbd_smb2_ioctl_recv(subreq, req, &out_output_buffer);
 122         TALLOC_FREE(subreq);
 123         if (NT_STATUS_EQUAL(status, STATUS_BUFFER_OVERFLOW)) {
 124                 /* also ok */
 125         } else if (!NT_STATUS_IS_OK(status)) {
 126                 error = smbd_smb2_request_error(req, status);
 127                 if (!NT_STATUS_IS_OK(error)) {
 128                         smbd_server_connection_terminate(req->conn,
 129                                                          nt_errstr(error));
 130                         return;
 131                 }
 132                 return;
 133         }
 134
 135         out_output_offset = SMB2_HDR_BODY + 0x30;
 136
 137         outhdr = (uint8_t *)req->out.vector[i].iov_base;
 138
 139         outbody = data_blob_talloc(req->out.vector, NULL, 0x30);
 140         if (outbody.data == NULL) {
 141                 error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 142                 if (!NT_STATUS_IS_OK(error)) {
 143                         smbd_server_connection_terminate(req->conn,
 144                                                          nt_errstr(error));
 145                         return;
 146                 }
 147                 return;
 148         }
 149
 150         SSVAL(outbody.data, 0x00, 0x30 + 1);    /* struct size */
 151         SSVAL(outbody.data, 0x02, 0);           /* reserved */
 152         SIVAL(outbody.data, 0x04, 0);           /* ctl code */
 153         SBVAL(outbody.data, 0x08, 0);           /* file id (persistent) */
 154         SBVAL(outbody.data, 0x10, 0);           /* file id (volatile) */
 155         SIVAL(outbody.data, 0x18, 0);           /* input offset */
 156         SIVAL(outbody.data, 0x1C, 0);           /* input count */
 157         SIVAL(outbody.data, 0x20,
 158               out_output_offset);               /* output offset */
 159         SIVAL(outbody.data, 0x24,
 160               out_output_buffer.length);        /* output count */
 161         SIVAL(outbody.data, 0x28, 0);           /* flags */
 162         SIVAL(outbody.data, 0x2C, 0);           /* reserved */
 163
 164         /*
 165          * Note: Windows sends back also the input from the request.
 166          *       I think this is stupid and I hope not required.
 167          *       For now we avoid a talloc + memcopy here...
 168          */
 169         outdyn = out_output_buffer;
 170
 171         error = smbd_smb2_request_done_ex(req, status, outbody, &outdyn,
 172                                           __location__);
 173         if (!NT_STATUS_IS_OK(error)) {
 174                 smbd_server_connection_terminate(req->conn,
 175                                                  nt_errstr(error));
 176                 return;
 177         }
 178 }
 179
 180 struct smbd_smb2_ioctl_state {
 181         struct smbd_smb2_request *smb2req;
 182         struct smb_request *smbreq;
 183         files_struct *fsp;
 184         DATA_BLOB in_input;
 185         uint32_t in_max_output;
 186         DATA_BLOB out_output;
 187 };
 188
 189 static void smbd_smb2_ioctl_pipe_write_done(struct tevent_req *subreq);
 190 static void smbd_smb2_ioctl_pipe_read_done(struct tevent_req *subreq);
 191
 192 static struct tevent_req *smbd_smb2_ioctl_send(TALLOC_CTX *mem_ctx,
 193                                                struct tevent_context *ev,
 194                                                struct smbd_smb2_request *smb2req,
 195                                                uint32_t in_ctl_code,
 196                                                uint64_t in_file_id_volatile,
 197                                                DATA_BLOB in_input,
 198                                                uint32_t in_max_output,
 199                                                uint32_t in_flags)
 200 {
 201         struct tevent_req *req;
 202         struct smbd_smb2_ioctl_state *state;
 203         struct smb_request *smbreq;
 204         files_struct *fsp = NULL;
 205         struct tevent_req *subreq;
 206
 207         req = tevent_req_create(mem_ctx, &state,
 208                                 struct smbd_smb2_ioctl_state);
 209         if (req == NULL) {
 210                 return NULL;
 211         }
 212         state->smb2req = smb2req;
 213         state->smbreq = NULL;
 214         state->fsp = NULL;
 215         state->in_input = in_input;
 216         state->in_max_output = in_max_output;
 217         state->out_output = data_blob_null;
 218
 219         DEBUG(10,("smbd_smb2_ioctl: file_id[0x%016llX]\n",
 220                   (unsigned long long)in_file_id_volatile));
 221
 222         smbreq = smbd_smb2_fake_smb_request(smb2req);
 223         if (tevent_req_nomem(smbreq, req)) {
 224                 return tevent_req_post(req, ev);
 225         }
 226         state->smbreq = smbreq;
 227
 228         if (in_file_id_volatile != UINT64_MAX) {
 229                 fsp = file_fsp(smbreq, (uint16_t)in_file_id_volatile);
 230                 if (fsp == NULL) {
 231                         tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 232                         return tevent_req_post(req, ev);
 233                 }
 234                 if (smbreq->conn != fsp->conn) {
 235                         tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 236                         return tevent_req_post(req, ev);
 237                 }
 238                 if (smb2req->session->vuid != fsp->vuid) {
 239                         tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 240                         return tevent_req_post(req, ev);
 241                 }
 242                 state->fsp = fsp;
 243         }
 244
 245         switch (in_ctl_code) {
 246         case 0x0011C017: /* FSCTL_PIPE_TRANSCEIVE */
 247
 248                 if (!IS_IPC(smbreq->conn)) {
 249                         tevent_req_nterror(req, NT_STATUS_INVALID_DEVICE_REQUEST);
 250                         return tevent_req_post(req, ev);
 251                 }
 252
 253                 if (fsp == NULL) {
 254                         tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 255                         return tevent_req_post(req, ev);
 256                 }
 257
 258                 if (!fsp_is_np(fsp)) {
 259                         tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 260                         return tevent_req_post(req, ev);
 261                 }
 262
 263                 subreq = np_write_send(state, ev,
 264                                        fsp->fake_file_handle,
 265                                        in_input.data,
 266                                        in_input.length);
 267                 if (tevent_req_nomem(subreq, req)) {
 268                         return tevent_req_post(req, ev);
 269                 }
 270                 tevent_req_set_callback(subreq,
 271                                         smbd_smb2_ioctl_pipe_write_done,
 272                                         req);
 273                 return req;
 274
 275         default:
 276                 if (IS_IPC(smbreq->conn)) {
 277                         tevent_req_nterror(req, NT_STATUS_FS_DRIVER_REQUIRED);
 278                         return tevent_req_post(req, ev);
 279                 }
 280                 tevent_req_nterror(req, NT_STATUS_INVALID_DEVICE_REQUEST);
 281                 return tevent_req_post(req, ev);
 282         }
 283
 284         tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
 285         return tevent_req_post(req, ev);
 286 }
 287
 288 static void smbd_smb2_ioctl_pipe_write_done(struct tevent_req *subreq)
 289 {
 290         struct tevent_req *req = tevent_req_callback_data(subreq,
 291                                  struct tevent_req);
 292         struct smbd_smb2_ioctl_state *state = tevent_req_data(req,
 293                                               struct smbd_smb2_ioctl_state);
 294         NTSTATUS status;
 295         ssize_t nwritten = -1;
 296
 297         status = np_write_recv(subreq, &nwritten);
 298         TALLOC_FREE(subreq);
 299         if (!NT_STATUS_IS_OK(status)) {
 300                 tevent_req_nterror(req, status);
 301                 return;
 302         }
 303
 304         if (nwritten != state->in_input.length) {
 305                 tevent_req_nterror(req, NT_STATUS_PIPE_NOT_AVAILABLE);
 306                 return;
 307         }
 308
 309         state->out_output = data_blob_talloc(state, NULL, state->in_max_output);
 310         if (state->in_max_output > 0 &&
 311             tevent_req_nomem(state->out_output.data, req)) {
 312                 return;
 313         }
 314
 315         subreq = np_read_send(state->smbreq->conn,
 316                               state->smb2req->conn->smb2.event_ctx,
 317                               state->fsp->fake_file_handle,
 318                               state->out_output.data,
 319                               state->out_output.length);
 320         if (tevent_req_nomem(subreq, req)) {
 321                 return;
 322         }
 323         tevent_req_set_callback(subreq, smbd_smb2_ioctl_pipe_read_done, req);
 324 }
 325
 326 static void smbd_smb2_ioctl_pipe_read_done(struct tevent_req *subreq)
 327 {
 328         struct tevent_req *req = tevent_req_callback_data(subreq,
 329                                  struct tevent_req);
 330         struct smbd_smb2_ioctl_state *state = tevent_req_data(req,
 331                                               struct smbd_smb2_ioctl_state);
 332         NTSTATUS status;
 333         ssize_t nread;
 334         bool is_data_outstanding;
 335
 336         status = np_read_recv(subreq, &nread, &is_data_outstanding);
 337         TALLOC_FREE(subreq);
 338         if (!NT_STATUS_IS_OK(status)) {
 339                 tevent_req_nterror(req, status);
 340                 return;
 341         }
 342
 343         state->out_output.length = nread;
 344
 345         tevent_req_done(req);
 346 }
 347
 348 static NTSTATUS smbd_smb2_ioctl_recv(struct tevent_req *req,
 349                                      TALLOC_CTX *mem_ctx,
 350                                      DATA_BLOB *out_output)
 351 {
 352         NTSTATUS status;
 353         struct smbd_smb2_ioctl_state *state = tevent_req_data(req,
 354                                               struct smbd_smb2_ioctl_state);
 355
 356         if (tevent_req_is_nterror(req, &status)) {
 357                 if (!NT_STATUS_EQUAL(status, STATUS_BUFFER_OVERFLOW)) {
 358                         tevent_req_received(req);
 359                         return status;
 360                 }
 361         }
 362
 363         *out_output = state->out_output;
 364         talloc_steal(mem_ctx, out_output->data);
 365
 366         tevent_req_received(req);
 367         return status;
 368 }