source3/libsmb/smb2cli_session.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.h"
  24 #include "../libcli/smb/smbXcli_base.h"
  25 #include "libsmb/proto.h"
  26 #include "lib/util/tevent_ntstatus.h"
  27 #include "../libcli/auth/spnego.h"
  28 #include "../auth/ntlmssp/ntlmssp.h"
  29
  30 struct smb2cli_logoff_state {
  31         struct cli_state *cli;
  32         uint8_t fixed[4];
  33 };
  34
  35 static void smb2cli_logoff_done(struct tevent_req *subreq);
  36
  37 struct tevent_req *smb2cli_logoff_send(TALLOC_CTX *mem_ctx,
  38                                        struct tevent_context *ev,
  39                                        struct cli_state *cli)
  40 {
  41         struct tevent_req *req, *subreq;
  42         struct smb2cli_logoff_state *state;
  43
  44         req = tevent_req_create(mem_ctx, &state,
  45                                 struct smb2cli_logoff_state);
  46         if (req == NULL) {
  47                 return NULL;
  48         }
  49         state->cli = cli;
  50         SSVAL(state->fixed, 0, 4);
  51
  52         subreq = smb2cli_req_send(state, ev,
  53                                   cli->conn, SMB2_OP_LOGOFF,
  54                                   0, 0, /* flags */
  55                                   cli->timeout,
  56                                   cli->smb2.pid,
  57                                   0, /* tid */
  58                                   cli->smb2.session,
  59                                   state->fixed, sizeof(state->fixed),
  60                                   NULL, 0);
  61         if (tevent_req_nomem(subreq, req)) {
  62                 return tevent_req_post(req, ev);
  63         }
  64         tevent_req_set_callback(subreq, smb2cli_logoff_done, req);
  65         return req;
  66 }
  67
  68 static void smb2cli_logoff_done(struct tevent_req *subreq)
  69 {
  70         struct tevent_req *req =
  71                 tevent_req_callback_data(subreq,
  72                 struct tevent_req);
  73         struct smb2cli_logoff_state *state =
  74                 tevent_req_data(req,
  75                 struct smb2cli_logoff_state);
  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 = 0x04
  82         }
  83         };
  84
  85         status = smb2cli_req_recv(subreq, state, &iov,
  86                                   expected, ARRAY_SIZE(expected));
  87         TALLOC_FREE(subreq);
  88         TALLOC_FREE(state->cli->smb2.session);
  89         if (tevent_req_nterror(req, status)) {
  90                 return;
  91         }
  92         tevent_req_done(req);
  93 }
  94
  95 NTSTATUS smb2cli_logoff_recv(struct tevent_req *req)
  96 {
  97         return tevent_req_simple_recv_ntstatus(req);
  98 }
  99
 100 NTSTATUS smb2cli_logoff(struct cli_state *cli)
 101 {
 102         TALLOC_CTX *frame = talloc_stackframe();
 103         struct event_context *ev;
 104         struct tevent_req *req;
 105         NTSTATUS status = NT_STATUS_NO_MEMORY;
 106
 107         if (cli_has_async_calls(cli)) {
 108                 /*
 109                  * Can't use sync call while an async call is in flight
 110                  */
 111                 status = NT_STATUS_INVALID_PARAMETER;
 112                 goto fail;
 113         }
 114         ev = event_context_init(frame);
 115         if (ev == NULL) {
 116                 goto fail;
 117         }
 118         req = smb2cli_logoff_send(frame, ev, cli);
 119         if (req == NULL) {
 120                 goto fail;
 121         }
 122         if (!tevent_req_poll_ntstatus(req, ev, &status)) {
 123                 goto fail;
 124         }
 125         status = smb2cli_logoff_recv(req);
 126  fail:
 127         TALLOC_FREE(frame);
 128         return status;
 129 }