1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
23 */
24
25 #include <smbsrv/smb_kproto.h>
26 #include <smbsrv/smb_share.h>
27
28 /*
29 * SmbTreeConnect: Map a share to a tree and obtain a tree-id (TID).
30 *
31 * Client Request Description
32 * ================================== =================================
33 *
34 * UCHAR WordCount; Count of parameter words = 0
35 * USHORT ByteCount; Count of data bytes; min = 4
36 * UCHAR BufferFormat1; 0x04
37 * STRING Path[]; Server name and share name
38 * UCHAR BufferFormat2; 0x04
39 * STRING Password[]; Password
40 * UCHAR BufferFormat3; 0x04
41 * STRING Service[]; Service name
42 *
43 * The CIFS server responds with:
44 *
45 * Server Response Description
46 * ================================ =================================
47 *
48 * UCHAR WordCount; Count of parameter words = 2
49 * USHORT MaxBufferSize; Max size message the server handles
50 * USHORT Tid; Tree ID
51 * USHORT ByteCount; Count of data bytes = 0
52 *
53 * If the negotiated dialect is MICROSOFT NETWORKS 1.03 or earlier,
54 * MaxBufferSize in the response message indicates the maximum size
55 * message that the server can handle. The client should not generate
56 * messages, nor expect to receive responses, larger than this. This
57 * must be constant for a given server. For newer dialects, this field
58 * is ignored.
59 */
60 smb_sdrc_t
smb_pre_tree_connect(smb_request_t * sr)61 smb_pre_tree_connect(smb_request_t *sr)
62 {
63 smb_arg_tcon_t *tcon = &sr->sr_tcon;
64 int rc;
65
66 /*
67 * Perhaps this should be "%A.sA" now that unicode is enabled.
68 */
69 rc = smbsr_decode_data(sr, "%AAA", sr, &tcon->path,
70 &tcon->password, &tcon->service);
71
72 tcon->flags = 0;
73 tcon->optional_support = 0;
74
75 DTRACE_SMB_2(op__TreeConnect__start, smb_request_t *, sr,
76 smb_arg_tcon_t *, tcon);
77
78 return ((rc == 0) ? SDRC_SUCCESS : SDRC_ERROR);
79 }
80
81 void
smb_post_tree_connect(smb_request_t * sr)82 smb_post_tree_connect(smb_request_t *sr)
83 {
84 DTRACE_SMB_1(op__TreeConnect__done, smb_request_t *, sr);
85 }
86
87 smb_sdrc_t
smb_com_tree_connect(smb_request_t * sr)88 smb_com_tree_connect(smb_request_t *sr)
89 {
90 smb_tree_t *tree;
91 int rc;
92
93 if ((tree = smb_tree_connect(sr)) == NULL)
94 return (SDRC_ERROR);
95
96 sr->smb_tid = tree->t_tid;
97 sr->tid_tree = tree;
98
99 rc = smbsr_encode_result(sr, 2, 0, "bwww",
100 2, /* wct */
101 (WORD)smb_maxbufsize, /* MaxBufferSize */
102 sr->smb_tid, /* TID */
103 0); /* bcc */
104
105 return ((rc == 0) ? SDRC_SUCCESS : SDRC_ERROR);
106 }
107
108 /*
109 * SmbTreeConnectX: Map a share to a tree and obtain a tree-id (TID).
110 *
111 * Client Request Description
112 * ================================= =================================
113 *
114 * UCHAR WordCount; Count of parameter words = 4
115 * UCHAR AndXCommand; Secondary (X) command; 0xFF = none
116 * UCHAR AndXReserved; Reserved (must be 0)
117 * USHORT AndXOffset; Offset to next command WordCount
118 * USHORT Flags; Additional information
119 * bit 0 set = disconnect Tid
120 * USHORT PasswordLength; Length of Password[]
121 * USHORT ByteCount; Count of data bytes; min = 3
122 * UCHAR Password[]; Password
123 * STRING Path[]; Server name and share name
124 * STRING Service[]; Service name
125 *
126 * If the negotiated dialect is LANMAN1.0 or later, then it is a protocol
127 * violation for the client to send this message prior to a successful
128 * SMB_COM_SESSION_SETUP_ANDX, and the server ignores Password.
129 *
130 * If the negotiated dialect is prior to LANMAN1.0 and the client has not
131 * sent a successful SMB_COM_SESSION_SETUP_ANDX request when the tree
132 * connect arrives, a user level security mode server must nevertheless
133 * validate the client's credentials.
134 *
135 * Flags (prefix with TREE_CONNECT_ANDX_):
136 * ========================== ========================================
137 * 0x0001 DISCONECT_TID The tree specified by TID in the SMB header
138 * should be disconnected - disconnect errors
139 * should be ignored.
140 *
141 * 0x0004 EXTENDED_SIGNATURES Client request for signing key protection.
142 *
143 * 0x0008 EXTENDED_RESPONSE Client request for extended information.
144 *
145 * Path follows UNC style syntax (\\server\share) and indicates the name
146 * of the resource to which the client wishes to connect.
147 *
148 * Because Password may be an authentication response, it is a variable
149 * length field with the length specified by PasswordLength. If
150 * authentication is not being used, Password should be a null terminated
151 * ASCII string with PasswordLength set to the string size including the
152 * terminating null.
153 *
154 * The server can enforce whatever policy it desires to govern share
155 * access. Administrative privilege is required for administrative
156 * shares (C$, etc.).
157 *
158 * The Service component indicates the type of resource the client
159 * intends to access. Valid values are:
160 *
161 * Service Description Earliest Dialect Allowed
162 * ======== ======================== ================================
163 *
164 * A: disk share PC NETWORK PROGRAM 1.0
165 * LPT1: printer PC NETWORK PROGRAM 1.0
166 * IPC named pipe MICROSOFT NETWORKS 3.0
167 * COMM communications device MICROSOFT NETWORKS 3.0
168 * ????? any type of device MICROSOFT NETWORKS 3.0
169 *
170 * If the negotiated dialect is earlier than DOS LANMAN2.1, the response to
171 * this SMB is:
172 *
173 * Server Response Description
174 * ================================ ===================================
175 *
176 * UCHAR WordCount; Count of parameter words = 2
177 * UCHAR AndXCommand; Secondary (X) command; 0xFF = none
178 * UCHAR AndXReserved; Reserved (must be 0)
179 * USHORT AndXOffset; Offset to next command WordCount
180 * USHORT ByteCount; Count of data bytes; min = 3
181 *
182 * If the negotiated is DOS LANMAN2.1 or later, the response to this SMB
183 * is:
184 *
185 * Server Response Description
186 * ================================ ===================================
187 *
188 * UCHAR WordCount; Count of parameter words = 3
189 * UCHAR AndXCommand; Secondary (X) command; 0xFF = none
190 * UCHAR AndXReserved; Reserved (must be 0)
191 * USHORT AndXOffset; Offset to next command WordCount
192 * USHORT OptionalSupport; Optional support bits
193 * USHORT ByteCount; Count of data bytes; min = 3
194 * UCHAR Service[]; Service type connected to. Always
195 * ANSII.
196 * STRING NativeFileSystem[]; Native file system for this tree
197 *
198 * NativeFileSystem is the name of the filesystem; values to be expected
199 * include FAT, NTFS, etc.
200 *
201 * OptionalSupport:
202 * ============================== ==========================
203 * 0x0001 SMB_SUPPORT_SEARCH_BITS The server supports the use of Search
204 * Attributes in client requests.
205 * 0x0002 SMB_SHARE_IS_IN_DFS The share is managed by DFS.
206 * 0x000C SMB_CSC_MASK Offline-caching mask - see CSC flags.
207 * 0x0010 SMB_UNIQUE_FILE_NAME The server uses long names and does not
208 * support short names. Indicator for
209 * clients directory/name-space caching.
210 * 0x0020 SMB_EXTENDED_SIGNATURES The server will use signing key protection.
211 *
212 * Client-side caching (offline files):
213 * ============================== ==========================
214 * 0x0000 SMB_CSC_CACHE_MANUAL_REINT Clients may cache files for offline use
215 * but automatic file-by-file reintegration
216 * is not allowed.
217 * 0x0004 SMB_CSC_CACHE_AUTO_REINT Automatic file-by-file reintegration is
218 * allowed.
219 * 0x0008 SMB_CSC_CACHE_VDO File opens do not need to be flowed.
220 * 0x000C SMB_CSC_CACHE_NONE CSC is disabled for this share.
221 *
222 * Some servers negotiate "DOS LANMAN2.1" dialect or later and still send
223 * the "downlevel" (i.e. wordcount==2) response. Valid AndX following
224 * commands are
225 *
226 * SMB_COM_OPEN SMB_COM_OPEN_ANDX SMB_COM_CREATE
227 * SMB_COM_CREATE_NEW SMB_COM_CREATE_DIRECTORY SMB_COM_DELETE
228 * SMB_COM_DELETE_DIRECTORY SMB_COM_FIND SMB_COM_COPY
229 * SMB_COM_FIND_UNIQUE SMB_COM_RENAME
230 * SMB_COM_CHECK_DIRECTORY SMB_COM_QUERY_INFORMATION
231 * SMB_COM_GET_PRINT_QUEUE SMB_COM_OPEN_PRINT_FILE
232 * SMB_COM_TRANSACTION SMB_COM_NO_ANDX_CMD
233 * SMB_COM_SET_INFORMATION SMB_COM_NT_RENAME
234 *
235 * Errors:
236 * ERRDOS/ERRnomem
237 * ERRDOS/ERRbadpath
238 * ERRDOS/ERRinvdevice
239 * ERRSRV/ERRaccess
240 * ERRSRV/ERRbadpw
241 * ERRSRV/ERRinvnetname
242 */
243 smb_sdrc_t
smb_pre_tree_connect_andx(smb_request_t * sr)244 smb_pre_tree_connect_andx(smb_request_t *sr)
245 {
246 smb_arg_tcon_t *tcon = &sr->sr_tcon;
247 uint8_t *pwbuf = NULL;
248 uint16_t pwlen = 0;
249 int rc;
250
251 rc = smbsr_decode_vwv(sr, "b.www", &sr->andx_com, &sr->andx_off,
252 &tcon->flags, &pwlen);
253 if (rc == 0) {
254 if (pwlen != 0)
255 pwbuf = smb_srm_zalloc(sr, pwlen);
256
257 rc = smbsr_decode_data(sr, "%#cus", sr, pwlen, pwbuf,
258 &tcon->path, &tcon->service);
259
260 tcon->pwdlen = pwlen;
261 tcon->password = (char *)pwbuf;
262 }
263
264 tcon->optional_support = 0;
265
266 DTRACE_SMB_2(op__TreeConnectX__start, smb_request_t *, sr,
267 smb_arg_tcon_t *, tcon);
268
269 return ((rc == 0) ? SDRC_SUCCESS : SDRC_ERROR);
270 }
271
272 void
smb_post_tree_connect_andx(smb_request_t * sr)273 smb_post_tree_connect_andx(smb_request_t *sr)
274 {
275 DTRACE_SMB_1(op__TreeConnectX__done, smb_request_t *, sr);
276 }
277
278 smb_sdrc_t
smb_com_tree_connect_andx(smb_request_t * sr)279 smb_com_tree_connect_andx(smb_request_t *sr)
280 {
281 smb_arg_tcon_t *tcon = &sr->sr_tcon;
282 smb_tree_t *tree;
283 char *service;
284 int rc;
285
286 if ((tree = smb_tree_connect(sr)) == NULL)
287 return (SDRC_ERROR);
288
289 sr->smb_tid = tree->t_tid;
290 sr->tid_tree = tree;
291
292 switch (tree->t_res_type & STYPE_MASK) {
293 case STYPE_IPC:
294 service = "IPC";
295 break;
296 case STYPE_PRINTQ:
297 service = "LPT1:";
298 break;
299 case STYPE_DISKTREE:
300 default:
301 service = "A:";
302 }
303
304 if (sr->session->dialect < NT_LM_0_12) {
305 rc = smbsr_encode_result(sr, 2, VAR_BCC, "bb.wwss",
306 (char)2, /* wct */
307 sr->andx_com,
308 VAR_BCC,
309 VAR_BCC,
310 service,
311 sr->tid_tree->t_typename);
312 } else {
313 rc = smbsr_encode_result(sr, 3, VAR_BCC, "bb.wwws%u",
314 (char)3, /* wct */
315 sr->andx_com,
316 (short)64,
317 tcon->optional_support,
318 VAR_BCC,
319 service,
320 sr,
321 sr->tid_tree->t_typename);
322 }
323
324 return ((rc == 0) ? SDRC_SUCCESS : SDRC_ERROR);
325 }
326
327 /*
328 * SmbTreeDisconnect: Disconnect a tree.
329 *
330 * Note: SDDF_SUPPRESS_UID is set for this operation, which means the sr
331 * uid_user field will not be valid on entry to these functions. Do not
332 * use it until it is set up in smb_com_tree_disconnect() or the system
333 * will panic.
334 *
335 * Note: there are scenarios in which the client does not send a tree
336 * disconnect request, for example, when ERRbaduid is returned from
337 * SmbReadX after a user has logged off. Any open files will remain
338 * around until the session is destroyed.
339 *
340 * Client Request Description
341 * ================================== =================================
342 *
343 * UCHAR WordCount; Count of parameter words = 0
344 * USHORT ByteCount; Count of data bytes = 0
345 *
346 * The resource sharing connection identified by Tid in the SMB header is
347 * logically disconnected from the server. Tid is invalidated; it will not
348 * be recognized if used by the client for subsequent requests. All locks,
349 * open files, etc. created on behalf of Tid are released.
350 *
351 * Server Response Description
352 * ================================== =================================
353 *
354 * UCHAR WordCount; Count of parameter words = 0
355 * USHORT ByteCount; Count of data bytes = 0
356 *
357 * Errors:
358 * ERRSRV/ERRinvnid
359 * ERRSRV/ERRbaduid
360 */
361 smb_sdrc_t
smb_pre_tree_disconnect(smb_request_t * sr)362 smb_pre_tree_disconnect(smb_request_t *sr)
363 {
364 sr->uid_user = smb_session_lookup_uid(sr->session, sr->smb_uid);
365 if (sr->uid_user != NULL)
366 sr->tid_tree = smb_user_lookup_tree(sr->uid_user, sr->smb_tid);
367
368 DTRACE_SMB_1(op__TreeDisconnect__start, smb_request_t *, sr);
369 return (SDRC_SUCCESS);
370 }
371
372 void
smb_post_tree_disconnect(smb_request_t * sr)373 smb_post_tree_disconnect(smb_request_t *sr)
374 {
375 DTRACE_SMB_1(op__TreeDisconnect__done, smb_request_t *, sr);
376 }
377
378 /*
379 * SmbTreeDisconnect requires a valid UID as well as a valid TID. Some
380 * clients logoff a user and then try to disconnect the trees connected
381 * by the user who has just been logged off, which would normally fail
382 * in the dispatch code with ERRbaduid but, unfortunately, ERRbaduid
383 * causes a problem for some of those clients. Windows returns ERRinvnid.
384 *
385 * To prevent ERRbaduid being returned, the UID and TID are looked up here
386 * rather than prior to dispatching SmbTreeDisconnect requests. If either
387 * the UID or the TID is invalid, ERRinvnid is returned.
388 */
389 smb_sdrc_t
smb_com_tree_disconnect(smb_request_t * sr)390 smb_com_tree_disconnect(smb_request_t *sr)
391 {
392 if (sr->uid_user == NULL || sr->tid_tree == NULL) {
393 smbsr_error(sr, NT_STATUS_INVALID_HANDLE, ERRDOS, ERRinvnid);
394 return (SDRC_ERROR);
395 }
396
397 sr->user_cr = smb_user_getcred(sr->uid_user);
398
399 smb_session_cancel_requests(sr->session, sr->tid_tree, sr);
400 smb_tree_disconnect(sr->tid_tree, B_TRUE);
401
402 if (smbsr_encode_empty_result(sr))
403 return (SDRC_ERROR);
404
405 return (SDRC_SUCCESS);
406 }
407