Line data    Source code

       1             : /* 
       2             :    Unix SMB/CIFS implementation.
       3             :    client change notify operations
       4             :    Copyright (C) Andrew Tridgell 2003
       5             :    
       6             :    This program is free software; you can redistribute it and/or modify
       7             :    it under the terms of the GNU General Public License as published by
       8             :    the Free Software Foundation; either version 3 of the License, or
       9             :    (at your option) any later version.
      10             :    
      11             :    This program is distributed in the hope that it will be useful,
      12             :    but WITHOUT ANY WARRANTY; without even the implied warranty of
      13             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      14             :    GNU General Public License for more details.
      15             :    
      16             :    You should have received a copy of the GNU General Public License
      17             :    along with this program.  If not, see <http://www.gnu.org/licenses/>.
      18             : */
      19             : 
      20             : #include "includes.h"
      21             : #include <tevent.h>
      22             : #include "libcli/raw/libcliraw.h"
      23             : #include "libcli/raw/raw_proto.h"
      24             : 
      25             : /****************************************************************************
      26             : change notify (async send)
      27             : ****************************************************************************/
      28         571 : _PUBLIC_ struct smbcli_request *smb_raw_changenotify_send(struct smbcli_tree *tree, union smb_notify *parms)
      29             : {
      30             :         struct smb_nttrans nt;
      31             :         uint8_t setup[8];
      32             : 
      33         571 :         if (parms->nttrans.level != RAW_NOTIFY_NTTRANS) {
      34           0 :                 return NULL;
      35             :         }
      36             : 
      37         571 :         nt.in.max_setup = 0;
      38         571 :         nt.in.max_param = parms->nttrans.in.buffer_size;
      39         571 :         nt.in.max_data = 0;
      40         571 :         nt.in.setup_count = 4;
      41         571 :         nt.in.setup = setup;
      42         571 :         SIVAL(setup, 0, parms->nttrans.in.completion_filter);
      43         571 :         SSVAL(setup, 4, parms->nttrans.in.file.fnum);
      44         571 :         SSVAL(setup, 6, parms->nttrans.in.recursive);        
      45         571 :         nt.in.function = NT_TRANSACT_NOTIFY_CHANGE;
      46         571 :         nt.in.params = data_blob(NULL, 0);
      47         571 :         nt.in.data = data_blob(NULL, 0);
      48             : 
      49         571 :         return smb_raw_nttrans_send(tree, &nt);
      50             : }
      51             : 
      52             : /****************************************************************************
      53             : change notify (async recv)
      54             : ****************************************************************************/
      55         571 : _PUBLIC_ NTSTATUS smb_raw_changenotify_recv(struct smbcli_request *req, 
      56             :                                    TALLOC_CTX *mem_ctx, union smb_notify *parms)
      57             : {
      58             :         struct smb_nttrans nt;
      59             :         NTSTATUS status;
      60             :         uint32_t ofs, i;
      61         571 :         struct smbcli_session *session = req?req->session:NULL;
      62             : 
      63         571 :         if (parms->nttrans.level != RAW_NOTIFY_NTTRANS) {
      64           0 :                 return NT_STATUS_INVALID_LEVEL;
      65             :         }
      66             : 
      67         571 :         status = smb_raw_nttrans_recv(req, mem_ctx, &nt);
      68         571 :         if (!NT_STATUS_IS_OK(status)) {
      69         508 :                 return status;
      70             :         }
      71             : 
      72          63 :         parms->nttrans.out.changes = NULL;
      73          63 :         parms->nttrans.out.num_changes = 0;
      74             : 
      75             :         /* count them */
      76         367 :         for (ofs=0; nt.out.params.length - ofs > 12; ) {
      77         299 :                 uint32_t next = IVAL(nt.out.params.data, ofs);
      78         299 :                 if (next % 4 != 0)
      79           0 :                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
      80         299 :                 parms->nttrans.out.num_changes++;
      81         540 :                 if (next == 0 ||
      82         241 :                     ofs + next >= nt.out.params.length) break;
      83         241 :                 ofs += next;
      84             :         }
      85             : 
      86             :         /* allocate array */
      87          63 :         parms->nttrans.out.changes = talloc_array(mem_ctx, struct notify_changes, parms->nttrans.out.num_changes);
      88          63 :         if (!parms->nttrans.out.changes) {
      89           0 :                 return NT_STATUS_NO_MEMORY;
      90             :         }
      91             : 
      92         362 :         for (i=ofs=0; i<parms->nttrans.out.num_changes; i++) {
      93         299 :                 parms->nttrans.out.changes[i].action = IVAL(nt.out.params.data, ofs+4);
      94         897 :                 smbcli_blob_pull_string(session, mem_ctx, &nt.out.params, 
      95         299 :                                         &parms->nttrans.out.changes[i].name, 
      96         598 :                                         ofs+8, ofs+12, STR_UNICODE);
      97         299 :                 ofs += IVAL(nt.out.params.data, ofs);
      98             :         }
      99             : 
     100          63 :         return NT_STATUS_OK;
     101             : }
     102             : 
     103             : /****************************************************************************
     104             :  Send a NT Cancel request - used to hurry along a pending request. Usually
     105             :  used to cancel a pending change notify request
     106             :  note that this request does not expect a response!
     107             : ****************************************************************************/
     108         529 : NTSTATUS smb_raw_ntcancel(struct smbcli_request *oldreq)
     109             : {
     110             :         bool ok;
     111             : 
     112         529 :         if (oldreq->subreqs[0] == NULL) {
     113           1 :                 return NT_STATUS_OK;
     114             :         }
     115             : 
     116         528 :         ok = tevent_req_cancel(oldreq->subreqs[0]);
     117         528 :         if (!ok) {
     118           0 :                 return NT_STATUS_INTERNAL_ERROR;
     119             :         }
     120             : 
     121         528 :         return NT_STATUS_OK;
     122             : }