source3/libsmb/smb2cli_close.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    smb2 lib
   4    Copyright (C) Volker Lendecke 2011
   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 "client.h"
  22 #include "async_smb.h"
  23 #include "smb2cli_base.h"
  24 #include "smb2cli.h"
  25 #include "libsmb/proto.h"
  26 #include "lib/util/tevent_ntstatus.h"
  27
  28 struct smb2cli_close_state {
  29         uint8_t fixed[24];
  30 };
  31
  32 static void smb2cli_close_done(struct tevent_req *subreq);
  33
  34 struct tevent_req *smb2cli_close_send(TALLOC_CTX *mem_ctx,
  35                                       struct tevent_context *ev,
  36                                       struct cli_state *cli,
  37                                       uint16_t flags,
  38                                       uint64_t fid_persistent,
  39                                       uint64_t fid_volatile)
  40 {
  41         struct tevent_req *req, *subreq;
  42         struct smb2cli_close_state *state;
  43         uint8_t *fixed;
  44
  45         req = tevent_req_create(mem_ctx, &state,
  46                                 struct smb2cli_close_state);
  47         if (req == NULL) {
  48                 return NULL;
  49         }
  50         fixed = state->fixed;
  51         SSVAL(fixed, 0, 24);
  52         SSVAL(fixed, 2, flags);
  53         SBVAL(fixed, 8, fid_persistent);
  54         SBVAL(fixed, 16, fid_volatile);
  55
  56         subreq = smb2cli_req_send(state, ev, cli, SMB2_OP_CLOSE,
  57                                   0, 0, /* flags */
  58                                   cli->timeout,
  59                                   cli->smb2.pid,
  60                                   cli->smb2.tid,
  61                                   cli->smb2.uid,
  62                                   state->fixed, sizeof(state->fixed),
  63                                   NULL, 0);
  64         if (tevent_req_nomem(subreq, req)) {
  65                 return tevent_req_post(req, ev);
  66         }
  67         tevent_req_set_callback(subreq, smb2cli_close_done, req);
  68         return req;
  69 }
  70
  71 static void smb2cli_close_done(struct tevent_req *subreq)
  72 {
  73         struct tevent_req *req =
  74                 tevent_req_callback_data(subreq,
  75                 struct tevent_req);
  76         NTSTATUS status;
  77         struct iovec *iov;
  78         static const struct smb2cli_req_expected_response expected[] = {
  79         {
  80                 .status = NT_STATUS_OK,
  81                 .body_size = 0x3C
  82         }
  83         };
  84
  85         status = smb2cli_req_recv(subreq, talloc_tos(), &iov,
  86                                   expected, ARRAY_SIZE(expected));
  87         if (tevent_req_nterror(req, status)) {
  88                 return;
  89         }
  90         tevent_req_done(req);
  91 }
  92
  93 NTSTATUS smb2cli_close_recv(struct tevent_req *req)
  94 {
  95         return tevent_req_simple_recv_ntstatus(req);
  96 }
  97
  98 NTSTATUS smb2cli_close(struct cli_state *cli, uint16_t flags,
  99                        uint64_t fid_persistent, uint64_t fid_volatile)
 100 {
 101         TALLOC_CTX *frame = talloc_stackframe();
 102         struct event_context *ev;
 103         struct tevent_req *req;
 104         NTSTATUS status = NT_STATUS_NO_MEMORY;
 105
 106         if (cli_has_async_calls(cli)) {
 107                 /*
 108                  * Can't use sync call while an async call is in flight
 109                  */
 110                 status = NT_STATUS_INVALID_PARAMETER;
 111                 goto fail;
 112         }
 113         ev = event_context_init(frame);
 114         if (ev == NULL) {
 115                 goto fail;
 116         }
 117         req = smb2cli_close_send(frame, ev, cli, flags,
 118                                  fid_persistent, fid_volatile);
 119         if (req == NULL) {
 120                 goto fail;
 121         }
 122         if (!tevent_req_poll_ntstatus(req, ev, &status)) {
 123                 goto fail;
 124         }
 125         status = smb2cli_close_recv(req);
 126  fail:
 127         TALLOC_FREE(frame);
 128         return status;
 129 }