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 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #include <smbsrv/smb_incl.h> 27 28 29 /* 30 * SmbTreeConnect: Map a share to a tree and obtain a tree-id (TID). 31 * 32 * Client Request Description 33 * ================================== ================================= 34 * 35 * UCHAR WordCount; Count of parameter words = 0 36 * USHORT ByteCount; Count of data bytes; min = 4 37 * UCHAR BufferFormat1; 0x04 38 * STRING Path[]; Server name and share name 39 * UCHAR BufferFormat2; 0x04 40 * STRING Password[]; Password 41 * UCHAR BufferFormat3; 0x04 42 * STRING Service[]; Service name 43 * 44 * The CIFS server responds with: 45 * 46 * Server Response Description 47 * ================================ ================================= 48 * 49 * UCHAR WordCount; Count of parameter words = 2 50 * USHORT MaxBufferSize; Max size message the server handles 51 * USHORT Tid; Tree ID 52 * USHORT ByteCount; Count of data bytes = 0 53 * 54 * If the negotiated dialect is MICROSOFT NETWORKS 1.03 or earlier, 55 * MaxBufferSize in the response message indicates the maximum size 56 * message that the server can handle. The client should not generate 57 * messages, nor expect to receive responses, larger than this. This 58 * must be constant for a given server. For newer dialects, this field 59 * is ignored. 60 */ 61 smb_sdrc_t 62 smb_pre_tree_connect(smb_request_t *sr) 63 { 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, &sr->arg.tcon.path, 70 &sr->arg.tcon.password, &sr->arg.tcon.service); 71 72 sr->arg.tcon.flags = 0; 73 sr->arg.tcon.optional_support = 0; 74 75 DTRACE_SMB_2(op__TreeConnect__start, smb_request_t *, sr, 76 struct tcon *, &sr->arg.tcon); 77 78 return ((rc == 0) ? SDRC_SUCCESS : SDRC_ERROR); 79 } 80 81 void 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 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 244 smb_pre_tree_connect_andx(smb_request_t *sr) 245 { 246 uint8_t *pwbuf = NULL; 247 uint16_t pwlen = 0; 248 int rc; 249 250 rc = smbsr_decode_vwv(sr, "b.www", &sr->andx_com, &sr->andx_off, 251 &sr->arg.tcon.flags, &pwlen); 252 if (rc == 0) { 253 if (pwlen != 0) { 254 pwbuf = (uint8_t *)smbsr_malloc(&sr->request_storage, 255 pwlen); 256 bzero(pwbuf, pwlen); 257 } 258 259 rc = smbsr_decode_data(sr, "%#cus", sr, pwlen, pwbuf, 260 &sr->arg.tcon.path, &sr->arg.tcon.service); 261 262 sr->arg.tcon.pwdlen = pwlen; 263 sr->arg.tcon.password = (char *)pwbuf; 264 } 265 266 sr->arg.tcon.optional_support = 0; 267 268 DTRACE_SMB_2(op__TreeConnectX__start, smb_request_t *, sr, 269 struct tcon *, &sr->arg.tcon); 270 271 return ((rc == 0) ? SDRC_SUCCESS : SDRC_ERROR); 272 } 273 274 void 275 smb_post_tree_connect_andx(smb_request_t *sr) 276 { 277 DTRACE_SMB_1(op__TreeConnectX__done, smb_request_t *, sr); 278 } 279 280 smb_sdrc_t 281 smb_com_tree_connect_andx(smb_request_t *sr) 282 { 283 smb_tree_t *tree; 284 char *service; 285 int rc; 286 287 if ((tree = smb_tree_connect(sr)) == NULL) 288 return (SDRC_ERROR); 289 290 sr->smb_tid = tree->t_tid; 291 sr->tid_tree = tree; 292 293 if (STYPE_ISIPC(tree->t_res_type)) 294 service = "IPC"; 295 else 296 service = "A:"; 297 298 if (sr->session->dialect < NT_LM_0_12) { 299 rc = smbsr_encode_result(sr, 2, VAR_BCC, "bb.wwss", 300 (char)2, /* wct */ 301 sr->andx_com, 302 VAR_BCC, 303 VAR_BCC, 304 service, 305 sr->tid_tree->t_typename); 306 } else { 307 rc = smbsr_encode_result(sr, 3, VAR_BCC, "bb.wwws%u", 308 (char)3, /* wct */ 309 sr->andx_com, 310 (short)64, 311 sr->arg.tcon.optional_support, 312 VAR_BCC, 313 service, 314 sr, 315 sr->tid_tree->t_typename); 316 } 317 318 return ((rc == 0) ? SDRC_SUCCESS : SDRC_ERROR); 319 } 320 321 /* 322 * SmbTreeDisconnect: Disconnect a tree. 323 * 324 * Note: SDDF_SUPPRESS_UID is set for this operation, which means the sr 325 * uid_user field will not be valid on entry to these functions. Do not 326 * use it until it is set up in smb_com_tree_disconnect() or the system 327 * will panic. 328 * 329 * Note: there are scenarios in which the client does not send a tree 330 * disconnect request, for example, when ERRbaduid is returned from 331 * SmbReadX after a user has logged off. Any open files will remain 332 * around until the session is destroyed. 333 * 334 * Client Request Description 335 * ================================== ================================= 336 * 337 * UCHAR WordCount; Count of parameter words = 0 338 * USHORT ByteCount; Count of data bytes = 0 339 * 340 * The resource sharing connection identified by Tid in the SMB header is 341 * logically disconnected from the server. Tid is invalidated; it will not 342 * be recognized if used by the client for subsequent requests. All locks, 343 * open files, etc. created on behalf of Tid are released. 344 * 345 * Server Response Description 346 * ================================== ================================= 347 * 348 * UCHAR WordCount; Count of parameter words = 0 349 * USHORT ByteCount; Count of data bytes = 0 350 * 351 * Errors: 352 * ERRSRV/ERRinvnid 353 * ERRSRV/ERRbaduid 354 */ 355 smb_sdrc_t 356 smb_pre_tree_disconnect(smb_request_t *sr) 357 { 358 DTRACE_SMB_1(op__TreeDisconnect__start, smb_request_t *, sr); 359 return (SDRC_SUCCESS); 360 } 361 362 void 363 smb_post_tree_disconnect(smb_request_t *sr) 364 { 365 DTRACE_SMB_1(op__TreeDisconnect__done, smb_request_t *, sr); 366 } 367 368 /* 369 * SmbTreeDisconnect requires a valid UID as well as a valid TID. Some 370 * clients logoff a user and then try to disconnect the trees connected 371 * by the user who has just been logged off, which would normally fail 372 * in the dispatch code with ERRbaduid but, unfortunately, ERRbaduid 373 * causes a problem for some of those clients. Windows returns ERRinvnid. 374 * 375 * To prevent ERRbaduid being returned, the UID and TID are looked up here 376 * rather than prior to dispatching SmbTreeDisconnect requests. If either 377 * the UID or the TID is invalid, ERRinvnid is returned. 378 */ 379 smb_sdrc_t 380 smb_com_tree_disconnect(smb_request_t *sr) 381 { 382 sr->uid_user = smb_user_lookup_by_uid(sr->session, sr->smb_uid); 383 if (sr->uid_user != NULL) 384 sr->tid_tree = smb_user_lookup_tree(sr->uid_user, 385 sr->smb_tid); 386 387 if (sr->uid_user == NULL || sr->tid_tree == NULL) { 388 smbsr_error(sr, NT_STATUS_INVALID_HANDLE, ERRDOS, ERRinvnid); 389 return (SDRC_ERROR); 390 } 391 392 sr->user_cr = smb_user_getcred(sr->uid_user); 393 394 smb_session_cancel_requests(sr->session, sr->tid_tree, sr); 395 smb_tree_disconnect(sr->tid_tree, B_TRUE); 396 397 if (smbsr_encode_empty_result(sr)) 398 return (SDRC_ERROR); 399 400 return (SDRC_SUCCESS); 401 } 402