2 Unix SMB/CIFS implementation.
4 Copyright (C) Andrew Tridgell 2003
5 Copyright (C) James J Myers 2003 <myersjj@samba.org>
6 Copyright (C) Stefan Metzmacher 2004
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #include "smbd/process_model.h"
27 this header declares the core context structures associated with smb
28 sockets, tree connects, requests etc
30 the idea is that we will eventually get rid of all our global
31 variables and instead store our stang from structures hanging off
35 /* the current user context for a request */
36 struct smbsrv_session {
37 struct smbsrv_session *prev, *next;
39 struct smbsrv_connection *smb_conn;
41 /* the vuid is used to specify the security context for this
42 request. Note that this may not be the same vuid as we
43 received on the wire (for example, for share mode or guest
47 struct gensec_security *gensec_ctx;
49 struct auth_session_info *session_info;
52 /* we need a forward declaration of the ntvfs_ops strucutre to prevent
57 struct smbsrv_tcon *next, *prev;
59 /* the server context that this was created on */
60 struct smbsrv_connection *smb_conn;
62 uint16_t cnum; /* an index passed over the wire (the TID) */
67 /* the NTVFS context - see source/ntvfs/ for details */
68 struct ntvfs_context *ntvfs_ctx;
70 /* the reported filesystem type */
73 /* the reported device type */
77 /* a set of flags to control handling of request structures */
78 #define REQ_CONTROL_LARGE (1<<1) /* allow replies larger than max_xmit */
80 /* the context for a single SMB request. This is passed to any request-context
82 struct smbsrv_request {
83 /* the smbsrv_connection needs a list of requests queued for send */
84 struct smbsrv_request *next, *prev;
86 /* the server_context contains all context specific to this SMB socket */
87 struct smbsrv_connection *smb_conn;
89 /* conn is only set for operations that have a valid TID */
90 struct smbsrv_tcon *tcon;
92 /* the session context is derived from the vuid */
93 struct smbsrv_session *session;
95 /* a set of flags to control usage of the request. See REQ_CONTROL_* */
96 unsigned control_flags;
98 /* the smb pid is needed for locking contexts */
101 /* the flags from the SMB request, in raw form (host byte order) */
102 uint16_t flags, flags2;
104 /* the system time when the request arrived */
105 struct timeval request_time;
107 /* this can contain a fnum from an earlier part of a chained
108 * message (such as an SMBOpenX), or -1 */
111 /* how far through the chain of SMB commands have we gone? */
112 unsigned chain_count;
114 /* the sequence number for signing */
117 /* ntvfs per request async states */
118 struct ntvfs_async_state *async_states;
120 struct request_buffer in;
121 struct request_buffer out;
124 /* this contains variables that should be used in % substitutions for
125 * smb.conf parameters */
126 struct substitute_context {
129 /* our local netbios name, as give to us by the client */
132 /* the remote netbios name, as give to us by the client */
133 char *remote_machine;
135 /* the select remote protocol */
138 /* the name of the client as should be displayed in
139 * smbstatus. Can be an IP or a netbios name */
142 /* the username for %U */
146 /* smb server context structure. This should contain all the state
147 * information associated with a SMB server connection
149 struct smbsrv_connection {
150 /* a count of the number of packets we have received. We
151 * actually only care about zero/non-zero at this stage */
154 /* context that has been negotiated between the client and server */
156 /* have we already done the NBT session establishment? */
157 BOOL done_nbt_session;
159 /* only one negprot per connection is allowed */
162 /* multiple session setups are allowed, but some parameters are
163 ignored in any but the first */
167 * Size of data we can send to client. Set
168 * by the client for all protocols above CORE.
169 * Set by us for CORE protocol.
171 unsigned max_send; /* init to BUFFER_SIZE */
174 * Size of the data we can receive. Set by us.
175 * Can be modified by the max xmit parameter.
177 unsigned max_recv; /* init to BUFFER_SIZE */
179 /* a guess at the remote architecture. Try not to rely on this - in almost
180 all cases using these values is the wrong thing to do */
181 enum remote_arch_types ra_type;
183 /* the negotiatiated protocol */
184 enum protocol_types protocol;
186 /* authentication context for multi-part negprot */
187 struct auth_context *auth_context;
189 /* state of NTLMSSP auth */
190 struct auth_ntlmssp_state *ntlmssp_state;
192 /* did we tell the client we support encrypted passwords? */
193 BOOL encrypted_passwords;
195 /* did we send an extended security negprot reply? */
196 BOOL spnego_negotiated;
198 /* client capabilities */
199 uint32_t client_caps;
201 /* the timezone we sent to the client */
205 /* the context associated with open tree connects on a smb socket */
207 /* list of open tree connects */
208 struct smbsrv_tcon *tcons;
210 /* an id tree used to allocate tids */
211 struct idr_context *idtree_tid;
214 /* the context associated with open files on an smb socket */
216 struct files_struct *files; /* open files */
218 /* a fsp to use when chaining */
219 struct files_struct *chain_fsp;
221 /* a fsp to use to save when breaking an oplock. */
222 struct files_struct *oplock_save_chain_fsp;
224 /* how many files are open */
227 /* limit for maximum open files */
228 int real_max_open_files;
231 /* context associated with currently valid session setups */
233 /* this holds info on session vuids that are already validated for this VC */
234 struct smbsrv_session *session_list;
235 uint16_t next_vuid; /* initialise to VUID_OFFSET */
236 int num_validated_vuids;
239 /* this holds long term state specific to the printing subsystem */
241 struct notify_queue *notify_queue_head;
244 /* the server_context holds a linked list of pending requests,
245 * this is used for blocking locks and requests blocked due to oplock
247 struct _smbsrv_pending_request {
248 struct _smbsrv_pending_request *next, *prev;
250 /* the request itself - needs to be freed */
251 struct smbsrv_request *request;
254 /* the timers context contains info on when we last did various
257 /* when did we last do timeout processing? */
258 time_t last_timeout_processing;
260 /* when did we last sent a keepalive */
261 time_t last_keepalive_sent;
263 /* when we last checked the smb.conf for auto-reload */
264 time_t last_smb_conf_reload;
267 struct smb_signing_context signing;
269 struct substitute_context substitute;
271 struct dcesrv_context *dcesrv;
273 /* the pid of the process handling this session */
276 struct server_connection *connection;
278 /* this holds a partially received request */
279 struct smbsrv_request *partial_req;
281 /* this holds list of replies that are waiting to be sent
283 struct smbsrv_request *pending_send;
285 /* a list of partially received transaction requests */
286 struct smbsrv_trans_partial {
287 struct smbsrv_trans_partial *next, *prev;
288 struct smbsrv_request *req;
289 struct smb_trans2 *trans;