libcli/smb/smb2cli_flush.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 "system/network.h"
  22 #include "lib/util/tevent_ntstatus.h"
  23 #include "smb_common.h"
  24 #include "smbXcli_base.h"
  25
  26 struct smb2cli_flush_state {
  27         uint8_t fixed[24];
  28 };
  29
  30 static void smb2cli_flush_done(struct tevent_req *subreq);
  31
  32 struct tevent_req *smb2cli_flush_send(TALLOC_CTX *mem_ctx,
  33                                        struct tevent_context *ev,
  34                                        struct smbXcli_conn *conn,
  35                                        uint32_t timeout_msec,
  36                                        struct smbXcli_session *session,
  37                                        struct smbXcli_tcon *tcon,
  38                                        uint64_t fid_persistent,
  39                                        uint64_t fid_volatile)
  40 {
  41         struct tevent_req *req, *subreq;
  42         struct smb2cli_flush_state *state;
  43         uint8_t *fixed;
  44
  45         req = tevent_req_create(mem_ctx, &state,
  46                                 struct smb2cli_flush_state);
  47         if (req == NULL) {
  48                 return NULL;
  49         }
  50         fixed = state->fixed;
  51         SSVAL(fixed, 0, 24);
  52         SBVAL(fixed, 8, fid_persistent);
  53         SBVAL(fixed, 16, fid_volatile);
  54
  55         subreq = smb2cli_req_send(state, ev, conn, SMB2_OP_FLUSH,
  56                                   0, 0, /* flags */
  57                                   timeout_msec,
  58                                   tcon,
  59                                   session,
  60                                   state->fixed, sizeof(state->fixed),
  61                                   NULL, 0, /* dyn* */
  62                                   0); /* max_dyn_len */
  63         if (tevent_req_nomem(subreq, req)) {
  64                 return tevent_req_post(req, ev);
  65         }
  66         tevent_req_set_callback(subreq, smb2cli_flush_done, req);
  67         return req;
  68 }
  69
  70 static void smb2cli_flush_done(struct tevent_req *subreq)
  71 {
  72         struct tevent_req *req =
  73                 tevent_req_callback_data(subreq,
  74                 struct tevent_req);
  75         NTSTATUS status;
  76         static const struct smb2cli_req_expected_response expected[] = {
  77         {
  78                 .status = NT_STATUS_OK,
  79                 .body_size = 0x04
  80         }
  81         };
  82
  83         status = smb2cli_req_recv(subreq, NULL, NULL,
  84                                   expected, ARRAY_SIZE(expected));
  85         TALLOC_FREE(subreq);
  86         if (tevent_req_nterror(req, status)) {
  87                 return;
  88         }
  89         tevent_req_done(req);
  90 }
  91
  92 NTSTATUS smb2cli_flush_recv(struct tevent_req *req)
  93 {
  94         return tevent_req_simple_recv_ntstatus(req);
  95 }
  96
  97 NTSTATUS smb2cli_flush(struct smbXcli_conn *conn,
  98                        uint32_t timeout_msec,
  99                        struct smbXcli_session *session,
 100                        struct smbXcli_tcon *tcon,
 101                        uint64_t fid_persistent,
 102                        uint64_t fid_volatile)
 103 {
 104         TALLOC_CTX *frame = talloc_stackframe();
 105         struct tevent_context *ev;
 106         struct tevent_req *req;
 107         NTSTATUS status = NT_STATUS_NO_MEMORY;
 108
 109         if (smbXcli_conn_has_async_calls(conn)) {
 110                 /*
 111                  * Can't use sync call while an async call is in flight
 112                  */
 113                 status = NT_STATUS_INVALID_PARAMETER;
 114                 goto fail;
 115         }
 116         ev = samba_tevent_context_init(frame);
 117         if (ev == NULL) {
 118                 goto fail;
 119         }
 120         req = smb2cli_flush_send(frame, ev, conn, timeout_msec,
 121                                  session, tcon,
 122                                  fid_persistent, fid_volatile);
 123         if (req == NULL) {
 124                 goto fail;
 125         }
 126         if (!tevent_req_poll_ntstatus(req, ev, &status)) {
 127                 goto fail;
 128         }
 129         status = smb2cli_flush_recv(req);
 130  fail:
 131         TALLOC_FREE(frame);
 132         return status;
 133 }