1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
/*
Unix SMB2 implementation.
Copyright (C) Stefan Metzmacher 2005
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/* the context for a single SMB2 request. This is passed to any request-context
functions */
struct smb2srv_request {
/* the smbsrv_connection needs a list of requests queued for send */
struct smb2srv_request *next, *prev;
/* the server_context contains all context specific to this SMB socket */
struct smbsrv_connection *smb_conn;
/* conn is only set for operations that have a valid TID */
struct smbsrv_tcon *tcon;
/* the session context is derived from the vuid */
struct smbsrv_session *session;
#define SMB2SRV_REQ_CTRL_FLAG_NOT_REPLY (1<<0)
uint32_t control_flags;
/* the system time when the request arrived */
struct timeval request_time;
/* a pointer to the per request union smb_* io structure */
void *io_ptr;
/* the ntvfs_request */
struct ntvfs_request *ntvfs;
/* Now the SMB2 specific stuff */
/* the status the backend returned */
NTSTATUS status;
/* for matching request and reply */
uint64_t seqnum;
/* the id that can be used to cancel the request */
uint32_t pending_id;
/* the offset to the next SMB2 Header for chained requests */
uint32_t chain_offset;
/* chained file handle */
uint8_t _chained_file_handle[16];
uint8_t *chained_file_handle;
bool is_signed;
struct smb2_request_buffer in;
struct smb2_request_buffer out;
};
struct smbsrv_request;
#include "smb_server/smb2/smb2_proto.h"
/* useful way of catching field size errors with file and line number */
#define SMB2SRV_CHECK_BODY_SIZE(req, size, dynamic) do { \
size_t is_size = req->in.body_size; \
uint16_t field_size; \
uint16_t want_size = ((dynamic)?(size)+1:(size)); \
if (is_size < (size)) { \
DEBUG(0,("%s: buffer too small 0x%x. Expected 0x%x\n", \
__location__, (unsigned)is_size, (unsigned)want_size)); \
smb2srv_send_error(req, NT_STATUS_INVALID_PARAMETER); \
return; \
}\
field_size = SVAL(req->in.body, 0); \
if (field_size != want_size) { \
DEBUG(0,("%s: unexpected fixed body size 0x%x. Expected 0x%x\n", \
__location__, (unsigned)field_size, (unsigned)want_size)); \
smb2srv_send_error(req, NT_STATUS_INVALID_PARAMETER); \
return; \
} \
} while (0)
#define SMB2SRV_CHECK(cmd) do {\
NTSTATUS _status; \
_status = cmd; \
if (!NT_STATUS_IS_OK(_status)) { \
smb2srv_send_error(req, _status); \
return; \
} \
} while (0)
/* useful wrapper for talloc with NO_MEMORY reply */
#define SMB2SRV_TALLOC_IO_PTR(ptr, type) do { \
ptr = talloc(req, type); \
if (!ptr) { \
smb2srv_send_error(req, NT_STATUS_NO_MEMORY); \
return; \
} \
req->io_ptr = ptr; \
} while (0)
#define SMB2SRV_SETUP_NTVFS_REQUEST(send_fn, state) do { \
req->ntvfs = ntvfs_request_create(req->tcon->ntvfs, req, \
req->session->session_info,\
0, \
req->request_time, \
req, send_fn, state); \
if (!req->ntvfs) { \
smb2srv_send_error(req, NT_STATUS_NO_MEMORY); \
return; \
} \
(void)talloc_steal(req->tcon->ntvfs, req); \
req->ntvfs->frontend_data.private_data = req; \
} while (0)
#define SMB2SRV_CHECK_FILE_HANDLE(handle) do { \
if (!handle) { \
smb2srv_send_error(req, NT_STATUS_FILE_CLOSED); \
return; \
} \
} while (0)
/*
check if the backend wants to handle the request asynchronously.
if it wants it handled synchronously then call the send function
immediately
*/
#define SMB2SRV_CALL_NTVFS_BACKEND(cmd) do { \
req->ntvfs->async_states->status = cmd; \
if (req->ntvfs->async_states->state & NTVFS_ASYNC_STATE_ASYNC) { \
NTSTATUS _status; \
_status = smb2srv_queue_pending(req); \
if (!NT_STATUS_IS_OK(_status)) { \
ntvfs_cancel(req->ntvfs); \
} \
} else { \
req->ntvfs->async_states->send_fn(req->ntvfs); \
} \
} while (0)
/* check req->ntvfs->async_states->status and if not OK then send an error reply */
#define SMB2SRV_CHECK_ASYNC_STATUS_ERR_SIMPLE do { \
req = talloc_get_type(ntvfs->async_states->private_data, struct smb2srv_request); \
req->status = ntvfs->async_states->status; \
if (NT_STATUS_IS_ERR(ntvfs->async_states->status)) { \
smb2srv_send_error(req, ntvfs->async_states->status); \
return; \
} \
} while (0)
#define SMB2SRV_CHECK_ASYNC_STATUS_ERR(ptr, type) do { \
SMB2SRV_CHECK_ASYNC_STATUS_ERR_SIMPLE; \
ptr = talloc_get_type(req->io_ptr, type); \
} while (0)
#define SMB2SRV_CHECK_ASYNC_STATUS_SIMPLE do { \
req = talloc_get_type(ntvfs->async_states->private_data, struct smb2srv_request); \
req->status = ntvfs->async_states->status; \
if (!NT_STATUS_IS_OK(ntvfs->async_states->status)) { \
smb2srv_send_error(req, ntvfs->async_states->status); \
return; \
} \
} while (0)
#define SMB2SRV_CHECK_ASYNC_STATUS(ptr, type) do { \
SMB2SRV_CHECK_ASYNC_STATUS_SIMPLE; \
ptr = talloc_get_type(req->io_ptr, type); \
} while (0)
|
