source4/libcli/smb2/notify.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    SMB2 client notify calls
   5
   6    Copyright (C) Stefan Metzmacher 2006
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "libcli/raw/libcliraw.h"
  24 #include "libcli/raw/raw_proto.h"
  25 #include "libcli/smb2/smb2.h"
  26 #include "libcli/smb2/smb2_calls.h"
  27
  28 /*
  29   send a notify request
  30 */
  31 struct smb2_request *smb2_notify_send(struct smb2_tree *tree, struct smb2_notify *io)
  32 {
  33         struct smb2_request *req;
  34         uint32_t old_timeout;
  35
  36         req = smb2_request_init_tree(tree, SMB2_OP_NOTIFY, 0x20, false, 0);
  37         if (req == NULL) return NULL;
  38
  39         SSVAL(req->out.hdr,  SMB2_HDR_CREDIT,   0x0030);
  40
  41         SSVAL(req->out.body, 0x02, io->in.recursive);
  42         SIVAL(req->out.body, 0x04, io->in.buffer_size);
  43         smb2_push_handle(req->out.body+0x08, &io->in.file.handle);
  44         SIVAL(req->out.body, 0x18, io->in.completion_filter);
  45         SIVAL(req->out.body, 0x1C, io->in.unknown);
  46
  47         req->credit_charge = (MAX(io->in.buffer_size, 1) - 1)/ 65536 + 1;
  48
  49         old_timeout = req->transport->options.request_timeout;
  50         req->transport->options.request_timeout = 0;
  51         smb2_transport_send(req);
  52         req->transport->options.request_timeout = old_timeout;
  53
  54         return req;
  55 }
  56
  57
  58 /*
  59   recv a notify reply
  60 */
  61 NTSTATUS smb2_notify_recv(struct smb2_request *req, TALLOC_CTX *mem_ctx,
  62                           struct smb2_notify *io)
  63 {
  64         NTSTATUS status;
  65         DATA_BLOB blob;
  66         uint32_t ofs, i;
  67
  68         if (!smb2_request_receive(req) ||
  69             !smb2_request_is_ok(req)) {
  70                 return smb2_request_destroy(req);
  71         }
  72
  73         SMB2_CHECK_PACKET_RECV(req, 0x08, true);
  74
  75         status = smb2_pull_o16s32_blob(&req->in, mem_ctx, req->in.body+0x02, &blob);
  76         if (!NT_STATUS_IS_OK(status)) {
  77                 return status;
  78         }
  79
  80         io->out.changes = NULL;
  81         io->out.num_changes = 0;
  82
  83         /* count them */
  84         for (ofs=0; blob.length - ofs > 12; ) {
  85                 uint32_t next = IVAL(blob.data, ofs);
  86                 io->out.num_changes++;
  87                 if (next == 0 || (ofs + next) >= blob.length) break;
  88                 ofs += next;
  89         }
  90
  91         /* allocate array */
  92         io->out.changes = talloc_array(mem_ctx, struct notify_changes, io->out.num_changes);
  93         if (!io->out.changes) {
  94                 return NT_STATUS_NO_MEMORY;
  95         }
  96
  97         for (i=ofs=0; i<io->out.num_changes; i++) {
  98                 io->out.changes[i].action = IVAL(blob.data, ofs+4);
  99                 smbcli_blob_pull_string(NULL, mem_ctx, &blob,
 100                                         &io->out.changes[i].name,
 101                                         ofs+8, ofs+12, STR_UNICODE);
 102                 ofs += IVAL(blob.data, ofs);
 103         }
 104
 105         return smb2_request_destroy(req);
 106 }
 107
 108 /*
 109   sync notify request
 110 */
 111 NTSTATUS smb2_notify(struct smb2_tree *tree, TALLOC_CTX *mem_ctx,
 112                      struct smb2_notify *io)
 113 {
 114         struct smb2_request *req = smb2_notify_send(tree, io);
 115         return smb2_notify_recv(req, mem_ctx, io);
 116 }