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         uint32_t tcon_id = 0;
  45
  46         req = tevent_req_create(mem_ctx, &state,
  47                                 struct smb2cli_flush_state);
  48         if (req == NULL) {
  49                 return NULL;
  50         }
  51         fixed = state->fixed;
  52         SSVAL(fixed, 0, 24);
  53         SBVAL(fixed, 8, fid_persistent);
  54         SBVAL(fixed, 16, fid_volatile);
  55
  56         if (tcon) {
  57                 tcon_id = smb2cli_tcon_current_id(tcon);
  58         }
  59
  60         subreq = smb2cli_req_send(state, ev, conn, SMB2_OP_FLUSH,
  61                                   0, 0, /* flags */
  62                                   timeout_msec,
  63                                   0xFEFF, /* pid */
  64                                   tcon_id,
  65                                   session,
  66                                   state->fixed, sizeof(state->fixed),
  67                                   NULL, 0);
  68         if (tevent_req_nomem(subreq, req)) {
  69                 return tevent_req_post(req, ev);
  70         }
  71         tevent_req_set_callback(subreq, smb2cli_flush_done, req);
  72         return req;
  73 }
  74
  75 static void smb2cli_flush_done(struct tevent_req *subreq)
  76 {
  77         struct tevent_req *req =
  78                 tevent_req_callback_data(subreq,
  79                 struct tevent_req);
  80         NTSTATUS status;
  81         static const struct smb2cli_req_expected_response expected[] = {
  82         {
  83                 .status = NT_STATUS_OK,
  84                 .body_size = 0x04
  85         }
  86         };
  87
  88         status = smb2cli_req_recv(subreq, NULL, NULL,
  89                                   expected, ARRAY_SIZE(expected));
  90         if (tevent_req_nterror(req, status)) {
  91                 return;
  92         }
  93         tevent_req_done(req);
  94 }
  95
  96 NTSTATUS smb2cli_flush_recv(struct tevent_req *req)
  97 {
  98         return tevent_req_simple_recv_ntstatus(req);
  99 }
 100
 101 NTSTATUS smb2cli_flush(struct smbXcli_conn *conn,
 102                        uint32_t timeout_msec,
 103                        struct smbXcli_session *session,
 104                        struct smbXcli_tcon *tcon,
 105                        uint64_t fid_persistent,
 106                        uint64_t fid_volatile)
 107 {
 108         TALLOC_CTX *frame = talloc_stackframe();
 109         struct tevent_context *ev;
 110         struct tevent_req *req;
 111         NTSTATUS status = NT_STATUS_NO_MEMORY;
 112
 113         if (smbXcli_conn_has_async_calls(conn)) {
 114                 /*
 115                  * Can't use sync call while an async call is in flight
 116                  */
 117                 status = NT_STATUS_INVALID_PARAMETER;
 118                 goto fail;
 119         }
 120         ev = tevent_context_init(frame);
 121         if (ev == NULL) {
 122                 goto fail;
 123         }
 124         req = smb2cli_flush_send(frame, ev, conn, timeout_msec,
 125                                  session, tcon,
 126                                  fid_persistent, fid_volatile);
 127         if (req == NULL) {
 128                 goto fail;
 129         }
 130         if (!tevent_req_poll_ntstatus(req, ev, &status)) {
 131                 goto fail;
 132         }
 133         status = smb2cli_flush_recv(req);
 134  fail:
 135         TALLOC_FREE(frame);
 136         return status;
 137 }