2 Unix SMB/CIFS implementation.
3 SMB parameters and setup
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Luke Kenneth Casson Leighton 1996-1998
6 Copyright (C) Jeremy Allison 1998
7 Copyright (C) James Myers 2003 <myersjj@samba.org>
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #ifndef _CLI_CONTEXT_H
25 #define _CLI_CONTEXT_H
27 struct cli_tree; /* forward declare */
28 struct cli_request; /* forward declare */
29 struct cli_session; /* forward declare */
30 struct cli_transport; /* forward declare */
32 /* context that will be and has been negotiated between the client and server */
33 struct cli_negotiate {
35 * negotiated maximum transmit size - this is given to us by the server
39 /* maximum number of requests that can be multiplexed */
42 /* the negotiatiated protocol */
43 enum protocol_types protocol;
45 uint8_t sec_mode; /* security mode returned by negprot */
47 DATA_BLOB server_guid; /* server_guid */
48 DATA_BLOB secblob; /* cryptkey or negTokenInit blob */
52 void (*sign_outgoing_message)(struct cli_request *req);
53 BOOL (*check_incoming_message)(struct cli_request *req);
54 void (*free_signing_context)(struct cli_transport *transport);
55 void *signing_context;
59 /* capabilities that the server reported */
60 uint32_t capabilities;
64 uint_t readbraw_supported:1;
65 uint_t writebraw_supported:1;
67 const char *server_domain;
70 /* this is the context for a SMB socket associated with the socket itself */
72 TALLOC_CTX *mem_ctx; /* life of socket pool */
74 /* when the reference count reaches zero then the socket is destroyed */
77 struct in_addr dest_ip;
82 /* the open file descriptor */
85 /* a count of the number of packets we have received. We
86 * actually only care about zero/non-zero at this stage */
89 /* the network address of the client */
92 /* timeout for socket operations in milliseconds. */
97 this structure allows applications to control the behaviour of the
101 uint_t use_oplocks:1;
102 uint_t use_level2_oplocks:1;
106 /* this is the context for the client transport layer */
107 struct cli_transport {
110 /* when the reference count reaches zero then the transport is destroyed */
113 /* socket level info */
114 struct cli_socket *socket;
116 /* the next mid to be allocated - needed for signing and
120 /* negotiated protocol information */
121 struct cli_negotiate negotiate;
123 /* options to control the behaviour of the client code */
124 struct cli_options options;
126 /* is a readbraw pending? we need to handle that case
127 specially on receiving packets */
128 uint_t readbraw_pending:1;
130 /* an idle function - if this is defined then it will be
131 called once every period milliseconds while we are waiting
134 void (*func)(struct cli_transport *, void *);
139 /* the error fields from the last message */
141 enum {ETYPE_NONE, ETYPE_DOS, ETYPE_NT, ETYPE_SOCKET, ETYPE_NBT} etype;
148 enum socket_error socket_error;
154 /* a oplock break request handler */
155 BOOL (*handler)(struct cli_transport *transport,
156 uint16_t tid, uint16_t fnum, uint8_t level, void *private);
157 /* private data passed to the oplock handler */
161 /* a list of async requests that are pending on this connection */
162 struct cli_request *pending_requests;
164 /* remember the called name - some sub-protocols require us to
165 know the server name */
166 struct nmb_name called;
169 /* this is the context for the user */
171 /* this is the context for the session layer */
173 TALLOC_CTX *mem_ctx; /* life of session */
175 /* when the reference count reaches zero then the session is destroyed */
178 /* transport layer info */
179 struct cli_transport *transport;
181 /* after a session setup the server provides us with
182 a vuid identifying the security context */
185 /* default pid for this session */
188 DATA_BLOB user_session_key;
190 /* the spnego context if we use extented security */
191 struct gensec_security *gensec;
195 cli_tree context: internal state for a tree connection.
198 /* life of tree tree */
201 /* when the reference count reaches zero then the tree is destroyed */
204 /* session layer info */
205 struct cli_session *session;
207 uint16_t tid; /* tree id, aka cnum */
212 /* the context for a single SMB request. This is passed to any request-context
213 * functions (similar to context.h, the server version).
214 * This will allow requests to be multi-threaded. */
216 /* allow a request to be part of a list of requests */
217 struct cli_request *next, *prev;
219 /* a talloc context for the lifetime of this request */
222 /* a request always has a transport context, nearly always has
223 a session context and usually has a tree context */
224 struct cli_transport *transport;
225 struct cli_session *session;
226 struct cli_tree *tree;
228 /* the flags2 from the SMB request, in raw form (host byte
229 order). Used to parse strings */
232 /* the NT status for this request. Set by packet receive code
233 or code detecting error. */
236 /* the sequence number of this packet - used for signing */
239 /* set if this is a one-way request, meaning we are not
240 expecting a reply from the server. */
241 uint_t one_way_request:1;
243 /* the mid of this packet - used to match replies */
247 /* the raw SMB buffer, including the 4 byte length header */
250 /* the size of the raw buffer, including 4 byte header */
253 /* how much has been allocated - on reply the buffer is over-allocated to
254 prevent too many realloc() calls
258 /* the start of the SMB header - this is always buffer+4 */
261 /* the command words and command word count. vwv points
262 into the raw buffer */
266 /* the data buffer and size. data points into the raw buffer */
270 /* ptr is used as a moving pointer into the data area
271 * of the packet. The reason its here and not a local
272 * variable in each function is that when a realloc of
273 * a send packet is done we need to move this
278 /* information on what to do with a reply when it is received
279 asyncronously. If this is not setup when a reply is received then
280 the reply is discarded
282 The private pointer is private to the caller of the client
283 library (the application), not private to the library
286 void (*fn)(struct cli_request *);
292 cli_state: internal state used in libcli library for single-threaded callers,
293 i.e. a single session on a single socket.
296 TALLOC_CTX *mem_ctx; /* life of client pool */
297 struct cli_transport *transport;
298 struct cli_session *session;
299 struct cli_tree *tree;
300 struct substitute_context substitute;
303 /* useful way of catching wct errors with file and line number */
304 #define CLI_CHECK_MIN_WCT(req, wcount) if ((req)->in.wct < (wcount)) { \
305 DEBUG(1,("Unexpected WCT %d at %s(%d) - expected min %d\n", (req)->in.wct, __FILE__, __LINE__, wcount)); \
306 req->status = NT_STATUS_INVALID_PARAMETER; \
310 #define CLI_CHECK_WCT(req, wcount) if ((req)->in.wct != (wcount)) { \
311 DEBUG(1,("Unexpected WCT %d at %s(%d) - expected %d\n", (req)->in.wct, __FILE__, __LINE__, wcount)); \
312 req->status = NT_STATUS_INVALID_PARAMETER; \
316 #endif /* _CLI_CONTEXT_H */