2 Unix SMB/CIFS implementation.
4 Copyright (C) Volker Lendecke 2011
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.
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.
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/>.
22 #include "async_smb.h"
23 #include "../libcli/smb/smbXcli_base.h"
25 #include "libsmb/proto.h"
26 #include "lib/util/tevent_ntstatus.h"
28 struct smb2cli_read_state
{
31 struct iovec
*recv_iov
;
36 static void smb2cli_read_done(struct tevent_req
*subreq
);
38 struct tevent_req
*smb2cli_read_send(TALLOC_CTX
*mem_ctx
,
39 struct tevent_context
*ev
,
40 struct smbXcli_conn
*conn
,
41 uint32_t timeout_msec
,
42 struct smbXcli_session
*session
,
46 uint64_t fid_persistent
,
47 uint64_t fid_volatile
,
48 uint64_t minimum_count
,
49 uint64_t remaining_bytes
)
51 struct tevent_req
*req
, *subreq
;
52 struct smb2cli_read_state
*state
;
55 req
= tevent_req_create(mem_ctx
, &state
,
56 struct smb2cli_read_state
);
64 SIVAL(fixed
, 4, length
);
65 SBVAL(fixed
, 8, offset
);
66 SBVAL(fixed
, 16, fid_persistent
);
67 SBVAL(fixed
, 24, fid_volatile
);
68 SBVAL(fixed
, 32, minimum_count
);
69 SBVAL(fixed
, 40, remaining_bytes
);
71 subreq
= smb2cli_req_send(state
, ev
, conn
, SMB2_OP_READ
,
77 state
->fixed
, sizeof(state
->fixed
),
78 state
->dyn_pad
, sizeof(state
->dyn_pad
));
79 if (tevent_req_nomem(subreq
, req
)) {
80 return tevent_req_post(req
, ev
);
82 tevent_req_set_callback(subreq
, smb2cli_read_done
, req
);
86 static void smb2cli_read_done(struct tevent_req
*subreq
)
88 struct tevent_req
*req
= tevent_req_callback_data(
89 subreq
, struct tevent_req
);
90 struct smb2cli_read_state
*state
=
92 struct smb2cli_read_state
);
96 static const struct smb2cli_req_expected_response expected
[] = {
98 .status
= STATUS_BUFFER_OVERFLOW
,
102 .status
= NT_STATUS_OK
,
107 status
= smb2cli_req_recv(subreq
, state
, &iov
,
108 expected
, ARRAY_SIZE(expected
));
109 if (tevent_req_nterror(req
, status
)) {
113 data_offset
= CVAL(iov
[1].iov_base
, 2);
114 state
->data_length
= IVAL(iov
[1].iov_base
, 4);
116 if ((data_offset
!= SMB2_HDR_BODY
+ 16) ||
117 (state
->data_length
> iov
[2].iov_len
)) {
118 tevent_req_nterror(req
, NT_STATUS_INVALID_NETWORK_RESPONSE
);
122 state
->recv_iov
= iov
;
123 state
->data
= (uint8_t *)iov
[2].iov_base
;
124 tevent_req_done(req
);
127 NTSTATUS
smb2cli_read_recv(struct tevent_req
*req
, TALLOC_CTX
*mem_ctx
,
128 uint8_t **data
, uint32_t *data_length
)
130 struct smb2cli_read_state
*state
=
132 struct smb2cli_read_state
);
135 if (tevent_req_is_nterror(req
, &status
)) {
138 talloc_steal(mem_ctx
, state
->recv_iov
);
139 *data_length
= state
->data_length
;
144 NTSTATUS
smb2cli_read(struct smbXcli_conn
*conn
,
145 uint32_t timeout_msec
,
146 struct smbXcli_session
*session
,
150 uint64_t fid_persistent
,
151 uint64_t fid_volatile
,
152 uint64_t minimum_count
,
153 uint64_t remaining_bytes
,
156 uint32_t *data_length
)
158 TALLOC_CTX
*frame
= talloc_stackframe();
159 struct tevent_context
*ev
;
160 struct tevent_req
*req
;
161 NTSTATUS status
= NT_STATUS_NO_MEMORY
;
163 if (smbXcli_conn_has_async_calls(conn
)) {
165 * Can't use sync call while an async call is in flight
167 status
= NT_STATUS_INVALID_PARAMETER
;
170 ev
= tevent_context_init(frame
);
174 req
= smb2cli_read_send(frame
, ev
,
175 conn
, timeout_msec
, session
, tcon_id
,
177 fid_persistent
, fid_volatile
,
178 minimum_count
, remaining_bytes
);
182 if (!tevent_req_poll_ntstatus(req
, ev
, &status
)) {
185 status
= smb2cli_read_recv(req
, mem_ctx
, data
, data_length
);