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         uint8_t fixed[4];
  32 };
  33
  34 static void smb2cli_logoff_done(struct tevent_req *subreq);
  35
  36 struct tevent_req *smb2cli_logoff_send(TALLOC_CTX *mem_ctx,
  37                                        struct tevent_context *ev,
  38                                        struct smbXcli_conn *conn,
  39                                        uint32_t timeout_msec,
  40                                        struct smbXcli_session *session)
  41 {
  42         struct tevent_req *req, *subreq;
  43         struct smb2cli_logoff_state *state;
  44
  45         req = tevent_req_create(mem_ctx, &state,
  46                                 struct smb2cli_logoff_state);
  47         if (req == NULL) {
  48                 return NULL;
  49         }
  50         SSVAL(state->fixed, 0, 4);
  51
  52         subreq = smb2cli_req_send(state, ev,
  53                                   conn, SMB2_OP_LOGOFF,
  54                                   0, 0, /* flags */
  55                                   timeout_msec,
  56                                   0xFEFF, /* pid */
  57                                   0, /* tid */
  58                                   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         if (tevent_req_nterror(req, status)) {
  89                 return;
  90         }
  91         tevent_req_done(req);
  92 }
  93
  94 NTSTATUS smb2cli_logoff_recv(struct tevent_req *req)
  95 {
  96         return tevent_req_simple_recv_ntstatus(req);
  97 }
  98
  99 NTSTATUS smb2cli_logoff(struct smbXcli_conn *conn,
 100                         uint32_t timeout_msec,
 101                         struct smbXcli_session *session)
 102 {
 103         TALLOC_CTX *frame = talloc_stackframe();
 104         struct event_context *ev;
 105         struct tevent_req *req;
 106         NTSTATUS status = NT_STATUS_NO_MEMORY;
 107
 108         if (smbXcli_conn_has_async_calls(conn)) {
 109                 /*
 110                  * Can't use sync call while an async call is in flight
 111                  */
 112                 status = NT_STATUS_INVALID_PARAMETER;
 113                 goto fail;
 114         }
 115         ev = event_context_init(frame);
 116         if (ev == NULL) {
 117                 goto fail;
 118         }
 119         req = smb2cli_logoff_send(frame, ev, conn, timeout_msec, session);
 120         if (req == NULL) {
 121                 goto fail;
 122         }
 123         if (!tevent_req_poll_ntstatus(req, ev, &status)) {
 124                 goto fail;
 125         }
 126         status = smb2cli_logoff_recv(req);
 127  fail:
 128         TALLOC_FREE(frame);
 129         return status;
 130 }