Line data    Source code

       1             : /*
       2             :  * Unix SMB/CIFS implementation.
       3             :  * Utility functions for reparse points.
       4             :  *
       5             :  * Copyright (C) Jeremy Allison 2018
       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 "util_reparse.h"
      23             : 
      24           4 : NTSTATUS fsctl_get_reparse_point(struct files_struct *fsp,
      25             :                                  TALLOC_CTX *mem_ctx,
      26             :                                  char **out_data,
      27             :                                  uint32_t max_out_len,
      28             :                                  uint32_t *out_len)
      29             : {
      30           4 :         DBG_DEBUG("Called on %s\n", fsp_str_dbg(fsp));
      31           4 :         return NT_STATUS_NOT_A_REPARSE_POINT;
      32             : }
      33             : 
      34          18 : static NTSTATUS check_reparse_data_buffer(
      35             :         const uint8_t *in_data, size_t in_len)
      36             : {
      37           0 :         uint16_t reparse_data_length;
      38             : 
      39          18 :         if (in_len == 0) {
      40           4 :                 DBG_DEBUG("in_len=0\n");
      41           4 :                 return NT_STATUS_INVALID_BUFFER_SIZE;
      42             :         }
      43          14 :         if (in_len < 8) {
      44           0 :                 DBG_DEBUG("in_len=%zu\n", in_len);
      45           0 :                 return NT_STATUS_IO_REPARSE_DATA_INVALID;
      46             :         }
      47             : 
      48          14 :         reparse_data_length = PULL_LE_U16(in_data, 4);
      49             : 
      50          14 :         if (reparse_data_length != (in_len - 8)) {
      51           0 :                 DBG_DEBUG("in_len=%zu, reparse_data_length=%"PRIu16"\n",
      52             :                           in_len,
      53             :                           reparse_data_length);
      54           0 :                 return NT_STATUS_IO_REPARSE_DATA_INVALID;
      55             :         }
      56             : 
      57          14 :         return NT_STATUS_OK;
      58             : }
      59             : 
      60          18 : NTSTATUS fsctl_set_reparse_point(struct files_struct *fsp,
      61             :                                  TALLOC_CTX *mem_ctx,
      62             :                                  const uint8_t *in_data,
      63             :                                  uint32_t in_len)
      64             : {
      65           0 :         NTSTATUS status;
      66             : 
      67          18 :         DBG_DEBUG("Called on %s\n", fsp_str_dbg(fsp));
      68             : 
      69          18 :         status = check_reparse_data_buffer(in_data, in_len);
      70          18 :         if (!NT_STATUS_IS_OK(status)) {
      71           4 :                 return status;
      72             :         }
      73             : 
      74          14 :         return NT_STATUS_NOT_A_REPARSE_POINT;
      75             : }
      76             : 
      77           0 : NTSTATUS fsctl_del_reparse_point(struct files_struct *fsp,
      78             :                                  TALLOC_CTX *mem_ctx,
      79             :                                  const uint8_t *in_data,
      80             :                                  uint32_t in_len)
      81             : {
      82           0 :         DBG_DEBUG("Called on %s\n", fsp_str_dbg(fsp));
      83           0 :         return NT_STATUS_NOT_A_REPARSE_POINT;
      84             : }