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
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
|
/*
Unix SMB/CIFS implementation.
Copyright (C) Andrew Tridgell 2003
Copyright (C) James J Myers 2003 <myersjj@samba.org>
Copyright (C) Stefan Metzmacher 2004
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "request.h"
#include "smbd/process_model.h"
/*
this header declares the core context structures associated with smb
sockets, tree connects, requests etc
the idea is that we will eventually get rid of all our global
variables and instead store our stang from structures hanging off
these basic elements
*/
/* the current user context for a request */
struct smbsrv_session {
struct smbsrv_session *prev, *next;
struct smbsrv_connection *smb_conn;
/* the vuid is used to specify the security context for this
request. Note that this may not be the same vuid as we
received on the wire (for example, for share mode or guest
access) */
uint16_t vuid;
struct gensec_security *gensec_ctx;
struct auth_session_info *session_info;
/* Distinguish between a VUID allocated for the multi-pass
* extended secrity session setup and one that is finished */
BOOL finished_sesssetup;
};
/* we need a forward declaration of the ntvfs_ops strucutre to prevent
include recursion */
struct ntvfs_context;
struct smbsrv_tcon {
struct smbsrv_tcon *next, *prev;
/* the server context that this was created on */
struct smbsrv_connection *smb_conn;
uint16_t tid; /* an index passed over the wire (the TID) */
int service;
BOOL read_only;
BOOL admin_user;
/* the NTVFS context - see source/ntvfs/ for details */
struct ntvfs_context *ntvfs_ctx;
/* the reported filesystem type */
char *fs_type;
/* the reported device type */
char *dev_type;
};
/* a set of flags to control handling of request structures */
#define REQ_CONTROL_LARGE (1<<1) /* allow replies larger than max_xmit */
/* the context for a single SMB request. This is passed to any request-context
functions */
struct smbsrv_request {
/* the smbsrv_connection needs a list of requests queued for send */
struct smbsrv_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;
/* a set of flags to control usage of the request. See REQ_CONTROL_* */
unsigned control_flags;
/* the smb pid is needed for locking contexts */
uint16_t smbpid;
/* the flags from the SMB request, in raw form (host byte order) */
uint16_t flags, flags2;
/* the system time when the request arrived */
struct timeval request_time;
/* this can contain a fnum from an earlier part of a chained
* message (such as an SMBOpenX), or -1 */
int chained_fnum;
/* how far through the chain of SMB commands have we gone? */
unsigned chain_count;
/* the sequence number for signing */
uint64_t seq_num;
/* ntvfs per request async states */
struct ntvfs_async_state *async_states;
struct request_buffer in;
struct request_buffer out;
};
/* this contains variables that should be used in % substitutions for
* smb.conf parameters */
struct substitute_context {
char *remote_arch;
/* our local netbios name, as give to us by the client */
char *local_machine;
/* the remote netbios name, as give to us by the client */
char *remote_machine;
/* the select remote protocol */
char *remote_proto;
/* the name of the client as should be displayed in
* smbstatus. Can be an IP or a netbios name */
char *client_name;
/* the username for %U */
char *user_name;
};
/* smb server context structure. This should contain all the state
* information associated with a SMB server connection
*/
struct smbsrv_connection {
/* context that has been negotiated between the client and server */
struct {
/* have we already done the NBT session establishment? */
BOOL done_nbt_session;
/* only one negprot per connection is allowed */
BOOL done_negprot;
/* multiple session setups are allowed, but some parameters are
ignored in any but the first */
BOOL done_sesssetup;
/*
* Size of data we can send to client. Set
* by the client for all protocols above CORE.
* Set by us for CORE protocol.
*/
unsigned max_send; /* init to BUFFER_SIZE */
/*
* Size of the data we can receive. Set by us.
* Can be modified by the max xmit parameter.
*/
unsigned max_recv; /* init to BUFFER_SIZE */
/* a guess at the remote architecture. Try not to rely on this - in almost
all cases using these values is the wrong thing to do */
enum remote_arch_types ra_type;
/* the negotiatiated protocol */
enum protocol_types protocol;
/* authentication context for multi-part negprot */
struct auth_context *auth_context;
/* state of NTLMSSP auth */
struct auth_ntlmssp_state *ntlmssp_state;
/* did we tell the client we support encrypted passwords? */
BOOL encrypted_passwords;
/* did we send an extended security negprot reply? */
BOOL spnego_negotiated;
/* client capabilities */
uint32_t client_caps;
/* the timezone we sent to the client */
int zone_offset;
/* NBT names only set when done_nbt_session is true */
struct nbt_name *called_name;
struct nbt_name *calling_name;
} negotiate;
/* the context associated with open tree connects on a smb socket */
struct {
/* list of open tree connects */
struct smbsrv_tcon *tcons;
/* an id tree used to allocate tids */
struct idr_context *idtree_tid;
} tree;
/* context associated with currently valid session setups */
struct {
int num_validated_vuids;
/* an id tree used to allocate vuids */
/* this holds info on session vuids that are already
* validated for this VC */
struct idr_context *idtree_vuid;
} sessions;
/* the server_context holds a linked list of pending requests,
* this is used for blocking locks and requests blocked due to oplock
* break requests */
struct _smbsrv_pending_request {
struct _smbsrv_pending_request *next, *prev;
/* the request itself - needs to be freed */
struct smbsrv_request *request;
} *requests;
struct smb_signing_context signing;
struct stream_connection *connection;
/* this holds a partially received request */
struct smbsrv_request *partial_req;
/* this holds list of replies that are waiting to be sent
to the client */
struct smbsrv_request *pending_send;
/* a list of partially received transaction requests */
struct smbsrv_trans_partial {
struct smbsrv_trans_partial *next, *prev;
struct smbsrv_request *req;
struct smb_trans2 *trans;
uint8_t command;
} *trans_partial;
BOOL processing;
};
|
