?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
ctdb-scripts: Support storing statd-callout state in cluster filesystem
[samba4-gss.git] / source4 / smb_server / smb / receive.c
blobb96cdbd821bbe3cebad0a0af687156080d30c8df
1 /*
2 Unix SMB/CIFS implementation.
3 process incoming packets - main loop
4 Copyright (C) Andrew Tridgell 1992-2005
5 Copyright (C) James J Myers 2003 <myersjj@samba.org>
6 Copyright (C) Stefan Metzmacher 2004-2005
7
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 3 of the License, or
11 (at your option) any later version.
12
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.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 */
21
22 #include "includes.h"
23 #include "system/time.h"
24 #include "lib/util/server_id.h"
25 #include "samba/service_stream.h"
26 #include "smb_server/smb_server.h"
27 #include "system/filesys.h"
28 #include "param/param.h"
29 #include "cluster/cluster.h"
30
31 /*
32 send an oplock break request to a client
33 */
34 NTSTATUS smbsrv_send_oplock_break(void *p, struct ntvfs_handle *ntvfs, uint8_t level)
35 {
36 struct smbsrv_tcon *tcon = talloc_get_type(p, struct smbsrv_tcon);
37 struct smbsrv_request *req;
38
39 req = smbsrv_init_request(tcon->smb_conn);
40 NT_STATUS_HAVE_NO_MEMORY(req);
41
42 smbsrv_setup_reply(req, 8, 0);
43
44 SCVAL(req->out.hdr,HDR_COM,SMBlockingX);
45 SSVAL(req->out.hdr,HDR_TID,tcon->tid);
46 SSVAL(req->out.hdr,HDR_PID,0xFFFF);
47 SSVAL(req->out.hdr,HDR_UID,0);
48 SSVAL(req->out.hdr,HDR_MID,0xFFFF);
49 SCVAL(req->out.hdr,HDR_FLG,0);
50 SSVAL(req->out.hdr,HDR_FLG2,0);
51
52 SSVAL(req->out.vwv, VWV(0), SMB_CHAIN_NONE);
53 SSVAL(req->out.vwv, VWV(1), 0);
54 smbsrv_push_fnum(req->out.vwv, VWV(2), ntvfs);
55 SCVAL(req->out.vwv, VWV(3), LOCKING_ANDX_OPLOCK_RELEASE);
56 SCVAL(req->out.vwv, VWV(3)+1, level);
57 SIVAL(req->out.vwv, VWV(4), 0);
58 SSVAL(req->out.vwv, VWV(6), 0);
59 SSVAL(req->out.vwv, VWV(7), 0);
60
61 smbsrv_send_reply(req);
62 return NT_STATUS_OK;
63 }
64
65 static void switch_message(int type, struct smbsrv_request *req);
66
67 /*
68 These flags determine some of the permissions required to do an operation
69 */
70 #define NEED_SESS (1<<0)
71 #define NEED_TCON (1<<1)
72 #define SIGNING_NO_REPLY (1<<2)
73 /* does VWV(0) of the request hold chaining information */
74 #define AND_X (1<<3)
75 /* The 64Kb question: are requests > 64K valid? */
76 #define LARGE_REQUEST (1<<4)
77
78 /*
79 define a list of possible SMB messages and their corresponding
80 functions. Any message that has a NULL function is unimplemented -
81 please feel free to contribute implementations!
82 */
83 static const struct smb_message_struct
84 {
85 const char *name;
86 void (*fn)(struct smbsrv_request *);
87 #define message_flags(type) smb_messages[(type) & 0xff].flags
88 int flags;
89 }
90 smb_messages[256] = {
91 /* 0x00 */ { "SMBmkdir", smbsrv_reply_mkdir, NEED_SESS|NEED_TCON },
92 /* 0x01 */ { "SMBrmdir", smbsrv_reply_rmdir, NEED_SESS|NEED_TCON },
93 /* 0x02 */ { "SMBopen", smbsrv_reply_open, NEED_SESS|NEED_TCON },
94 /* 0x03 */ { "SMBcreate", smbsrv_reply_mknew, NEED_SESS|NEED_TCON },
95 /* 0x04 */ { "SMBclose", smbsrv_reply_close, NEED_SESS|NEED_TCON },
96 /* 0x05 */ { "SMBflush", smbsrv_reply_flush, NEED_SESS|NEED_TCON },
97 /* 0x06 */ { "SMBunlink", smbsrv_reply_unlink, NEED_SESS|NEED_TCON },
98 /* 0x07 */ { "SMBmv", smbsrv_reply_mv, NEED_SESS|NEED_TCON },
99 /* 0x08 */ { "SMBgetatr", smbsrv_reply_getatr, NEED_SESS|NEED_TCON },
100 /* 0x09 */ { "SMBsetatr", smbsrv_reply_setatr, NEED_SESS|NEED_TCON },
101 /* 0x0a */ { "SMBread", smbsrv_reply_read, NEED_SESS|NEED_TCON },
102 /* 0x0b */ { "SMBwrite", smbsrv_reply_write, NEED_SESS|NEED_TCON },
103 /* 0x0c */ { "SMBlock", smbsrv_reply_lock, NEED_SESS|NEED_TCON },
104 /* 0x0d */ { "SMBunlock", smbsrv_reply_unlock, NEED_SESS|NEED_TCON },
105 /* 0x0e */ { "SMBctemp", smbsrv_reply_ctemp, NEED_SESS|NEED_TCON },
106 /* 0x0f */ { "SMBmknew", smbsrv_reply_mknew, NEED_SESS|NEED_TCON },
107 /* 0x10 */ { "SMBcheckpath", smbsrv_reply_chkpth, NEED_SESS|NEED_TCON },
108 /* 0x11 */ { "SMBexit", smbsrv_reply_exit, NEED_SESS },
109 /* 0x12 */ { "SMBlseek", smbsrv_reply_lseek, NEED_SESS|NEED_TCON },
110 /* 0x13 */ { "SMBlockread", smbsrv_reply_lockread, NEED_SESS|NEED_TCON },
111 /* 0x14 */ { "SMBwriteunlock", smbsrv_reply_writeunlock, NEED_SESS|NEED_TCON },
112 /* 0x15 */ { NULL, NULL, 0 },
113 /* 0x16 */ { NULL, NULL, 0 },
114 /* 0x17 */ { NULL, NULL, 0 },
115 /* 0x18 */ { NULL, NULL, 0 },
116 /* 0x19 */ { NULL, NULL, 0 },
117 /* 0x1a */ { "SMBreadbraw", smbsrv_reply_readbraw, NEED_SESS|NEED_TCON },
118 /* 0x1b */ { "SMBreadBmpx", smbsrv_reply_readbmpx, NEED_SESS|NEED_TCON },
119 /* 0x1c */ { "SMBreadBs", NULL, 0 },
120 /* 0x1d */ { "SMBwritebraw", smbsrv_reply_writebraw, NEED_SESS|NEED_TCON },
121 /* 0x1e */ { "SMBwriteBmpx", smbsrv_reply_writebmpx, NEED_SESS|NEED_TCON },
122 /* 0x1f */ { "SMBwriteBs", smbsrv_reply_writebs, NEED_SESS|NEED_TCON },
123 /* 0x20 */ { "SMBwritec", NULL, 0 },
124 /* 0x21 */ { NULL, NULL, 0 },
125 /* 0x22 */ { "SMBsetattrE", smbsrv_reply_setattrE, NEED_SESS|NEED_TCON },
126 /* 0x23 */ { "SMBgetattrE", smbsrv_reply_getattrE, NEED_SESS|NEED_TCON },
127 /* 0x24 */ { "SMBlockingX", smbsrv_reply_lockingX, NEED_SESS|NEED_TCON|AND_X },
128 /* 0x25 */ { "SMBtrans", smbsrv_reply_trans, NEED_SESS|NEED_TCON },
129 /* 0x26 */ { "SMBtranss", smbsrv_reply_transs, NEED_SESS|NEED_TCON },
130 /* 0x27 */ { "SMBioctl", smbsrv_reply_ioctl, NEED_SESS|NEED_TCON },
131 /* 0x28 */ { "SMBioctls", NULL, NEED_SESS|NEED_TCON },
132 /* 0x29 */ { "SMBcopy", smbsrv_reply_copy, NEED_SESS|NEED_TCON },
133 /* 0x2a */ { "SMBmove", NULL, NEED_SESS|NEED_TCON },
134 /* 0x2b */ { "SMBecho", smbsrv_reply_echo, 0 },
135 /* 0x2c */ { "SMBwriteclose", smbsrv_reply_writeclose, NEED_SESS|NEED_TCON },
136 /* 0x2d */ { "SMBopenX", smbsrv_reply_open_and_X, NEED_SESS|NEED_TCON|AND_X },
137 /* 0x2e */ { "SMBreadX", smbsrv_reply_read_and_X, NEED_SESS|NEED_TCON|AND_X },
138 /* 0x2f */ { "SMBwriteX", smbsrv_reply_write_and_X, NEED_SESS|NEED_TCON|AND_X|LARGE_REQUEST},
139 /* 0x30 */ { NULL, NULL, 0 },
140 /* 0x31 */ { NULL, NULL, 0 },
141 /* 0x32 */ { "SMBtrans2", smbsrv_reply_trans2, NEED_SESS|NEED_TCON },
142 /* 0x33 */ { "SMBtranss2", smbsrv_reply_transs2, NEED_SESS|NEED_TCON },
143 /* 0x34 */ { "SMBfindclose", smbsrv_reply_findclose, NEED_SESS|NEED_TCON },
144 /* 0x35 */ { "SMBfindnclose", smbsrv_reply_findnclose, NEED_SESS|NEED_TCON },
145 /* 0x36 */ { NULL, NULL, 0 },
146 /* 0x37 */ { NULL, NULL, 0 },
147 /* 0x38 */ { NULL, NULL, 0 },
148 /* 0x39 */ { NULL, NULL, 0 },
149 /* 0x3a */ { NULL, NULL, 0 },
150 /* 0x3b */ { NULL, NULL, 0 },
151 /* 0x3c */ { NULL, NULL, 0 },
152 /* 0x3d */ { NULL, NULL, 0 },
153 /* 0x3e */ { NULL, NULL, 0 },
154 /* 0x3f */ { NULL, NULL, 0 },
155 /* 0x40 */ { NULL, NULL, 0 },
156 /* 0x41 */ { NULL, NULL, 0 },
157 /* 0x42 */ { NULL, NULL, 0 },
158 /* 0x43 */ { NULL, NULL, 0 },
159 /* 0x44 */ { NULL, NULL, 0 },
160 /* 0x45 */ { NULL, NULL, 0 },
161 /* 0x46 */ { NULL, NULL, 0 },
162 /* 0x47 */ { NULL, NULL, 0 },
163 /* 0x48 */ { NULL, NULL, 0 },
164 /* 0x49 */ { NULL, NULL, 0 },
165 /* 0x4a */ { NULL, NULL, 0 },
166 /* 0x4b */ { NULL, NULL, 0 },
167 /* 0x4c */ { NULL, NULL, 0 },
168 /* 0x4d */ { NULL, NULL, 0 },
169 /* 0x4e */ { NULL, NULL, 0 },
170 /* 0x4f */ { NULL, NULL, 0 },
171 /* 0x50 */ { NULL, NULL, 0 },
172 /* 0x51 */ { NULL, NULL, 0 },
173 /* 0x52 */ { NULL, NULL, 0 },
174 /* 0x53 */ { NULL, NULL, 0 },
175 /* 0x54 */ { NULL, NULL, 0 },
176 /* 0x55 */ { NULL, NULL, 0 },
177 /* 0x56 */ { NULL, NULL, 0 },
178 /* 0x57 */ { NULL, NULL, 0 },
179 /* 0x58 */ { NULL, NULL, 0 },
180 /* 0x59 */ { NULL, NULL, 0 },
181 /* 0x5a */ { NULL, NULL, 0 },
182 /* 0x5b */ { NULL, NULL, 0 },
183 /* 0x5c */ { NULL, NULL, 0 },
184 /* 0x5d */ { NULL, NULL, 0 },
185 /* 0x5e */ { NULL, NULL, 0 },
186 /* 0x5f */ { NULL, NULL, 0 },
187 /* 0x60 */ { NULL, NULL, 0 },
188 /* 0x61 */ { NULL, NULL, 0 },
189 /* 0x62 */ { NULL, NULL, 0 },
190 /* 0x63 */ { NULL, NULL, 0 },
191 /* 0x64 */ { NULL, NULL, 0 },
192 /* 0x65 */ { NULL, NULL, 0 },
193 /* 0x66 */ { NULL, NULL, 0 },
194 /* 0x67 */ { NULL, NULL, 0 },
195 /* 0x68 */ { NULL, NULL, 0 },
196 /* 0x69 */ { NULL, NULL, 0 },
197 /* 0x6a */ { NULL, NULL, 0 },
198 /* 0x6b */ { NULL, NULL, 0 },
199 /* 0x6c */ { NULL, NULL, 0 },
200 /* 0x6d */ { NULL, NULL, 0 },
201 /* 0x6e */ { NULL, NULL, 0 },
202 /* 0x6f */ { NULL, NULL, 0 },
203 /* 0x70 */ { "SMBtcon", smbsrv_reply_tcon, NEED_SESS },
204 /* 0x71 */ { "SMBtdis", smbsrv_reply_tdis, NEED_TCON },
205 /* 0x72 */ { "SMBnegprot", smbsrv_reply_negprot, 0 },
206 /* 0x73 */ { "SMBsesssetupX", smbsrv_reply_sesssetup, AND_X },
207 /* 0x74 */ { "SMBulogoffX", smbsrv_reply_ulogoffX, NEED_SESS|AND_X }, /* ulogoff doesn't give a valid TID */
208 /* 0x75 */ { "SMBtconX", smbsrv_reply_tcon_and_X, NEED_SESS|AND_X },
209 /* 0x76 */ { NULL, NULL, 0 },
210 /* 0x77 */ { NULL, NULL, 0 },
211 /* 0x78 */ { NULL, NULL, 0 },
212 /* 0x79 */ { NULL, NULL, 0 },
213 /* 0x7a */ { NULL, NULL, 0 },
214 /* 0x7b */ { NULL, NULL, 0 },
215 /* 0x7c */ { NULL, NULL, 0 },
216 /* 0x7d */ { NULL, NULL, 0 },
217 /* 0x7e */ { NULL, NULL, 0 },
218 /* 0x7f */ { NULL, NULL, 0 },
219 /* 0x80 */ { "SMBdskattr", smbsrv_reply_dskattr, NEED_SESS|NEED_TCON },
220 /* 0x81 */ { "SMBsearch", smbsrv_reply_search, NEED_SESS|NEED_TCON },
221 /* 0x82 */ { "SMBffirst", smbsrv_reply_search, NEED_SESS|NEED_TCON },
222 /* 0x83 */ { "SMBfunique", smbsrv_reply_search, NEED_SESS|NEED_TCON },
223 /* 0x84 */ { "SMBfclose", smbsrv_reply_fclose, NEED_SESS|NEED_TCON },
224 /* 0x85 */ { NULL, NULL, 0 },
225 /* 0x86 */ { NULL, NULL, 0 },
226 /* 0x87 */ { NULL, NULL, 0 },
227 /* 0x88 */ { NULL, NULL, 0 },
228 /* 0x89 */ { NULL, NULL, 0 },
229 /* 0x8a */ { NULL, NULL, 0 },
230 /* 0x8b */ { NULL, NULL, 0 },
231 /* 0x8c */ { NULL, NULL, 0 },
232 /* 0x8d */ { NULL, NULL, 0 },
233 /* 0x8e */ { NULL, NULL, 0 },
234 /* 0x8f */ { NULL, NULL, 0 },
235 /* 0x90 */ { NULL, NULL, 0 },
236 /* 0x91 */ { NULL, NULL, 0 },
237 /* 0x92 */ { NULL, NULL, 0 },
238 /* 0x93 */ { NULL, NULL, 0 },
239 /* 0x94 */ { NULL, NULL, 0 },
240 /* 0x95 */ { NULL, NULL, 0 },
241 /* 0x96 */ { NULL, NULL, 0 },
242 /* 0x97 */ { NULL, NULL, 0 },
243 /* 0x98 */ { NULL, NULL, 0 },
244 /* 0x99 */ { NULL, NULL, 0 },
245 /* 0x9a */ { NULL, NULL, 0 },
246 /* 0x9b */ { NULL, NULL, 0 },
247 /* 0x9c */ { NULL, NULL, 0 },
248 /* 0x9d */ { NULL, NULL, 0 },
249 /* 0x9e */ { NULL, NULL, 0 },
250 /* 0x9f */ { NULL, NULL, 0 },
251 /* 0xa0 */ { "SMBnttrans", smbsrv_reply_nttrans, NEED_SESS|NEED_TCON|LARGE_REQUEST },
252 /* 0xa1 */ { "SMBnttranss", smbsrv_reply_nttranss, NEED_SESS|NEED_TCON },
253 /* 0xa2 */ { "SMBntcreateX", smbsrv_reply_ntcreate_and_X, NEED_SESS|NEED_TCON|AND_X },
254 /* 0xa3 */ { NULL, NULL, 0 },
255 /* 0xa4 */ { "SMBntcancel", smbsrv_reply_ntcancel, NEED_SESS|NEED_TCON|SIGNING_NO_REPLY },
256 /* 0xa5 */ { "SMBntrename", smbsrv_reply_ntrename, NEED_SESS|NEED_TCON },
257 /* 0xa6 */ { NULL, NULL, 0 },
258 /* 0xa7 */ { NULL, NULL, 0 },
259 /* 0xa8 */ { NULL, NULL, 0 },
260 /* 0xa9 */ { NULL, NULL, 0 },
261 /* 0xaa */ { NULL, NULL, 0 },
262 /* 0xab */ { NULL, NULL, 0 },
263 /* 0xac */ { NULL, NULL, 0 },
264 /* 0xad */ { NULL, NULL, 0 },
265 /* 0xae */ { NULL, NULL, 0 },
266 /* 0xaf */ { NULL, NULL, 0 },
267 /* 0xb0 */ { NULL, NULL, 0 },
268 /* 0xb1 */ { NULL, NULL, 0 },
269 /* 0xb2 */ { NULL, NULL, 0 },
270 /* 0xb3 */ { NULL, NULL, 0 },
271 /* 0xb4 */ { NULL, NULL, 0 },
272 /* 0xb5 */ { NULL, NULL, 0 },
273 /* 0xb6 */ { NULL, NULL, 0 },
274 /* 0xb7 */ { NULL, NULL, 0 },
275 /* 0xb8 */ { NULL, NULL, 0 },
276 /* 0xb9 */ { NULL, NULL, 0 },
277 /* 0xba */ { NULL, NULL, 0 },
278 /* 0xbb */ { NULL, NULL, 0 },
279 /* 0xbc */ { NULL, NULL, 0 },
280 /* 0xbd */ { NULL, NULL, 0 },
281 /* 0xbe */ { NULL, NULL, 0 },
282 /* 0xbf */ { NULL, NULL, 0 },
283 /* 0xc0 */ { "SMBsplopen", smbsrv_reply_printopen, NEED_SESS|NEED_TCON },
284 /* 0xc1 */ { "SMBsplwr", smbsrv_reply_printwrite, NEED_SESS|NEED_TCON },
285 /* 0xc2 */ { "SMBsplclose", smbsrv_reply_printclose, NEED_SESS|NEED_TCON },
286 /* 0xc3 */ { "SMBsplretq", smbsrv_reply_printqueue, NEED_SESS|NEED_TCON },
287 /* 0xc4 */ { NULL, NULL, 0 },
288 /* 0xc5 */ { NULL, NULL, 0 },
289 /* 0xc6 */ { NULL, NULL, 0 },
290 /* 0xc7 */ { NULL, NULL, 0 },
291 /* 0xc8 */ { NULL, NULL, 0 },
292 /* 0xc9 */ { NULL, NULL, 0 },
293 /* 0xca */ { NULL, NULL, 0 },
294 /* 0xcb */ { NULL, NULL, 0 },
295 /* 0xcc */ { NULL, NULL, 0 },
296 /* 0xcd */ { NULL, NULL, 0 },
297 /* 0xce */ { NULL, NULL, 0 },
298 /* 0xcf */ { NULL, NULL, 0 },
299 /* 0xd0 */ { "SMBsends", NULL, 0 },
300 /* 0xd1 */ { "SMBsendb", NULL, 0 },
301 /* 0xd2 */ { "SMBfwdname", NULL, 0 },
302 /* 0xd3 */ { "SMBcancelf", NULL, 0 },
303 /* 0xd4 */ { "SMBgetmac", NULL, 0 },
304 /* 0xd5 */ { "SMBsendstrt", NULL, 0 },
305 /* 0xd6 */ { "SMBsendend", NULL, 0 },
306 /* 0xd7 */ { "SMBsendtxt", NULL, 0 },
307 /* 0xd8 */ { NULL, NULL, 0 },
308 /* 0xd9 */ { NULL, NULL, 0 },
309 /* 0xda */ { NULL, NULL, 0 },
310 /* 0xdb */ { NULL, NULL, 0 },
311 /* 0xdc */ { NULL, NULL, 0 },
312 /* 0xdd */ { NULL, NULL, 0 },
313 /* 0xde */ { NULL, NULL, 0 },
314 /* 0xdf */ { NULL, NULL, 0 },
315 /* 0xe0 */ { NULL, NULL, 0 },
316 /* 0xe1 */ { NULL, NULL, 0 },
317 /* 0xe2 */ { NULL, NULL, 0 },
318 /* 0xe3 */ { NULL, NULL, 0 },
319 /* 0xe4 */ { NULL, NULL, 0 },
320 /* 0xe5 */ { NULL, NULL, 0 },
321 /* 0xe6 */ { NULL, NULL, 0 },
322 /* 0xe7 */ { NULL, NULL, 0 },
323 /* 0xe8 */ { NULL, NULL, 0 },
324 /* 0xe9 */ { NULL, NULL, 0 },
325 /* 0xea */ { NULL, NULL, 0 },
326 /* 0xeb */ { NULL, NULL, 0 },
327 /* 0xec */ { NULL, NULL, 0 },
328 /* 0xed */ { NULL, NULL, 0 },
329 /* 0xee */ { NULL, NULL, 0 },
330 /* 0xef */ { NULL, NULL, 0 },
331 /* 0xf0 */ { NULL, NULL, 0 },
332 /* 0xf1 */ { NULL, NULL, 0 },
333 /* 0xf2 */ { NULL, NULL, 0 },
334 /* 0xf3 */ { NULL, NULL, 0 },
335 /* 0xf4 */ { NULL, NULL, 0 },
336 /* 0xf5 */ { NULL, NULL, 0 },
337 /* 0xf6 */ { NULL, NULL, 0 },
338 /* 0xf7 */ { NULL, NULL, 0 },
339 /* 0xf8 */ { NULL, NULL, 0 },
340 /* 0xf9 */ { NULL, NULL, 0 },
341 /* 0xfa */ { NULL, NULL, 0 },
342 /* 0xfb */ { NULL, NULL, 0 },
343 /* 0xfc */ { NULL, NULL, 0 },
344 /* 0xfd */ { NULL, NULL, 0 },
345 /* 0xfe */ { NULL, NULL, 0 },
346 /* 0xff */ { NULL, NULL, 0 }
347 };
348
349 /****************************************************************************
350 receive a SMB request header from the wire, forming a request_context
351 from the result
352 ****************************************************************************/
353 NTSTATUS smbsrv_recv_smb_request(void *private_data, DATA_BLOB blob)
354 {
355 struct smbsrv_connection *smb_conn = talloc_get_type(private_data, struct smbsrv_connection);
356 struct smbsrv_request *req;
357 struct timeval cur_time = timeval_current();
358 uint8_t command;
359
360 smb_conn->statistics.last_request_time = cur_time;
361
362 /* see if its a special NBT packet */
363 if (CVAL(blob.data, 0) != 0) {
364 req = smbsrv_init_request(smb_conn);
365 NT_STATUS_HAVE_NO_MEMORY(req);
366
367 ZERO_STRUCT(req->in);
368
369 req->in.buffer = talloc_steal(req, blob.data);
370 req->in.size = blob.length;
371 req->request_time = cur_time;
372
373 smbsrv_reply_special(req);
374 return NT_STATUS_OK;
375 }
376
377 if ((NBT_HDR_SIZE + MIN_SMB_SIZE) > blob.length) {
378 DEBUG(2,("Invalid SMB packet: length %ld\n", (long)blob.length));
379 smbsrv_terminate_connection(smb_conn, "Invalid SMB packet");
380 return NT_STATUS_OK;
381 }
382
383 /* Make sure this is an SMB packet */
384 if (IVAL(blob.data, NBT_HDR_SIZE) != SMB_MAGIC) {
385 DEBUG(2,("Non-SMB packet of length %ld. Terminating connection\n",
386 (long)blob.length));
387 smbsrv_terminate_connection(smb_conn, "Non-SMB packet");
388 return NT_STATUS_OK;
389 }
390
391 req = smbsrv_init_request(smb_conn);
392 NT_STATUS_HAVE_NO_MEMORY(req);
393
394 req->in.buffer = talloc_steal(req, blob.data);
395 req->in.size = blob.length;
396 req->request_time = cur_time;
397 req->chained_fnum = -1;
398 req->in.allocated = req->in.size;
399 req->in.hdr = req->in.buffer + NBT_HDR_SIZE;
400 req->in.vwv = req->in.hdr + HDR_VWV;
401 req->in.wct = CVAL(req->in.hdr, HDR_WCT);
402
403 command = CVAL(req->in.hdr, HDR_COM);
404
405 if (req->in.vwv + VWV(req->in.wct) <= req->in.buffer + req->in.size) {
406 req->in.data = req->in.vwv + VWV(req->in.wct) + 2;
407 req->in.data_size = SVAL(req->in.vwv, VWV(req->in.wct));
408
409 /* special handling for oversize calls. Windows seems
410 to take the maximum of the BCC value and the
411 computed buffer size. This handles oversized writeX
412 calls, and possibly oversized SMBtrans calls */
413 if ((message_flags(command) & LARGE_REQUEST) &&
414 ( !(message_flags(command) & AND_X) ||
415 (req->in.wct < 1 || SVAL(req->in.vwv, VWV(0)) == SMB_CHAIN_NONE)) &&
416 req->in.data_size < req->in.size - PTR_DIFF(req->in.data,req->in.buffer)) {
417 req->in.data_size = req->in.size - PTR_DIFF(req->in.data,req->in.buffer);
418 }
419 }
420
421 if (NBT_HDR_SIZE + MIN_SMB_SIZE + 2*req->in.wct > req->in.size) {
422 DEBUG(2,("Invalid SMB word count %d\n", req->in.wct));
423 smbsrv_terminate_connection(req->smb_conn, "Invalid SMB packet");
424 return NT_STATUS_OK;
425 }
426
427 if (NBT_HDR_SIZE + MIN_SMB_SIZE + 2*req->in.wct + req->in.data_size > req->in.size) {
428 DEBUG(2,("Invalid SMB buffer length count %d\n",
429 (int)req->in.data_size));
430 smbsrv_terminate_connection(req->smb_conn, "Invalid SMB packet");
431 return NT_STATUS_OK;
432 }
433
434 req->flags2 = SVAL(req->in.hdr, HDR_FLG2);
435
436 /* fix the bufinfo */
437 smbsrv_setup_bufinfo(req);
438
439 if (!smbsrv_signing_check_incoming(req)) {
440 smbsrv_send_error(req, NT_STATUS_ACCESS_DENIED);
441 return NT_STATUS_OK;
442 }
443
444 command = CVAL(req->in.hdr, HDR_COM);
445 switch_message(command, req);
446 return NT_STATUS_OK;
447 }
448
449 /****************************************************************************
450 return a string containing the function name of a SMB command
451 ****************************************************************************/
452 static const char *smb_fn_name(uint8_t type)
453 {
454 const char *unknown_name = "SMBunknown";
455
456 if (smb_messages[type].name == NULL)
457 return unknown_name;
458
459 return smb_messages[type].name;
460 }
461
462
463 /****************************************************************************
464 Do a switch on the message type and call the specific reply function for this
465 message. Unlike earlier versions of Samba the reply functions are responsible
466 for sending the reply themselves, rather than returning a size to this function
467 The reply functions may also choose to delay the processing by pushing the message
468 onto the message queue
469 ****************************************************************************/
470 static void switch_message(int type, struct smbsrv_request *req)
471 {
472 int flags;
473 struct smbsrv_connection *smb_conn = req->smb_conn;
474 NTSTATUS status;
475 struct server_id_buf idbuf;
476
477 type &= 0xff;
478
479 errno = 0;
480
481 if (smb_messages[type].fn == NULL) {
482 DEBUG(0,("Unknown message type %d!\n",type));
483 smbsrv_reply_unknown(req);
484 return;
485 }
486
487 flags = smb_messages[type].flags;
488
489 req->tcon = smbsrv_smb_tcon_find(smb_conn, SVAL(req->in.hdr,HDR_TID), req->request_time);
490
491 if (!req->session) {
492 /* setup the user context for this request if it
493 hasn't already been initialised (to cope with SMB
494 chaining) */
495
496 req->session = smbsrv_session_find(req->smb_conn, SVAL(req->in.hdr,HDR_UID), req->request_time);
497 }
498
499 DEBUG(5, ("switch message %s (task_id %s)\n",
500 smb_fn_name(type),
501 server_id_str_buf(req->smb_conn->connection->server_id,
502 &idbuf)));
503
504 /* this must be called before we do any reply */
505 if (flags & SIGNING_NO_REPLY) {
506 smbsrv_signing_no_reply(req);
507 }
508
509 /* see if the vuid is valid */
510 if ((flags & NEED_SESS) && !req->session) {
511 status = NT_STATUS_DOS(ERRSRV, ERRbaduid);
512 /* amazingly, the error code depends on the command */
513 switch (type) {
514 case SMBntcreateX:
515 case SMBntcancel:
516 case SMBulogoffX:
517 break;
518 default:
519 if (req->smb_conn->config.nt_status_support &&
520 req->smb_conn->negotiate.client_caps & CAP_STATUS32) {
521 status = NT_STATUS_INVALID_HANDLE;
522 }
523 break;
524 }
525 /*
526 * TODO:
527 * don't know how to handle smb signing for this case
528 * so just skip the reply
529 */
530 if ((flags & SIGNING_NO_REPLY) &&
531 (req->smb_conn->signing.signing_state != SMB_SIGNING_ENGINE_OFF)) {
532 DEBUG(1,("SKIP ERROR REPLY: %s %s because of unknown smb signing case\n",
533 smb_fn_name(type), nt_errstr(status)));
534 talloc_free(req);
535 return;
536 }
537 smbsrv_send_error(req, status);
538 return;
539 }
540
541 /* does this protocol need a valid tree connection? */
542 if ((flags & NEED_TCON) && !req->tcon) {
543 status = NT_STATUS_DOS(ERRSRV, ERRinvnid);
544 /* amazingly, the error code depends on the command */
545 switch (type) {
546 case SMBntcreateX:
547 case SMBntcancel:
548 case SMBtdis:
549 break;
550 default:
551 if (req->smb_conn->config.nt_status_support &&
552 req->smb_conn->negotiate.client_caps & CAP_STATUS32) {
553 status = NT_STATUS_INVALID_HANDLE;
554 }
555 break;
556 }
557 /*
558 * TODO:
559 * don't know how to handle smb signing for this case
560 * so just skip the reply
561 */
562 if ((flags & SIGNING_NO_REPLY) &&
563 (req->smb_conn->signing.signing_state != SMB_SIGNING_ENGINE_OFF)) {
564 DEBUG(1,("SKIP ERROR REPLY: %s %s because of unknown smb signing case\n",
565 smb_fn_name(type), nt_errstr(status)));
566 talloc_free(req);
567 return;
568 }
569 smbsrv_send_error(req, status);
570 return;
571 }
572
573 smb_messages[type].fn(req);
574 }
575
576 /*
577 we call this when first first part of a possibly chained request has been completed
578 and we need to call the 2nd part, if any
579 */
580 void smbsrv_chain_reply(struct smbsrv_request *req)
581 {
582 uint16_t chain_cmd, chain_offset;
583 uint8_t *vwv, *data;
584 uint16_t wct;
585 uint16_t data_size;
586
587 if (req->in.wct < 2 || req->out.wct < 2) {
588 smbsrv_send_error(req, NT_STATUS_DOS(ERRSRV, ERRerror));
589 return;
590 }
591
592 chain_cmd = CVAL(req->in.vwv, VWV(0));
593 chain_offset = SVAL(req->in.vwv, VWV(1));
594
595 if (chain_cmd == SMB_CHAIN_NONE) {
596 /* end of chain */
597 SSVAL(req->out.vwv, VWV(0), SMB_CHAIN_NONE);
598 SSVAL(req->out.vwv, VWV(1), 0);
599 smbsrv_send_reply(req);
600 return;
601 }
602
603 if (chain_offset + req->in.hdr >= req->in.buffer + req->in.size) {
604 goto error;
605 }
606
607 wct = CVAL(req->in.hdr, chain_offset);
608 vwv = req->in.hdr + chain_offset + 1;
609
610 if (vwv + VWV(wct) + 2 > req->in.buffer + req->in.size) {
611 goto error;
612 }
613
614 data_size = SVAL(vwv, VWV(wct));
615 data = vwv + VWV(wct) + 2;
616
617 if (data + data_size > req->in.buffer + req->in.size) {
618 goto error;
619 }
620
621 /* all seems legit */
622 req->in.vwv = vwv;
623 req->in.wct = wct;
624 req->in.data = data;
625 req->in.data_size = data_size;
626 req->in.ptr = data;
627
628 /* fix the bufinfo */
629 smbsrv_setup_bufinfo(req);
630
631 req->chain_count++;
632
633 SSVAL(req->out.vwv, VWV(0), chain_cmd);
634 SSVAL(req->out.vwv, VWV(1), req->out.size - NBT_HDR_SIZE);
635
636 /* cleanup somestuff for the next request */
637 DLIST_REMOVE(req->smb_conn->requests, req);
638 talloc_unlink(req, req->ntvfs);
639 req->ntvfs = NULL;
640 talloc_free(req->io_ptr);
641 req->io_ptr = NULL;
642
643 switch_message(chain_cmd, req);
644 return;
645
646 error:
647 SSVAL(req->out.vwv, VWV(0), SMB_CHAIN_NONE);
648 SSVAL(req->out.vwv, VWV(1), 0);
649 smbsrv_send_error(req, NT_STATUS_DOS(ERRSRV, ERRerror));
650 }
651
652 /*
653 * init the SMB protocol related stuff
654 */
655 NTSTATUS smbsrv_init_smb_connection(struct smbsrv_connection *smb_conn, struct loadparm_context *lp_ctx)
656 {
657 NTSTATUS status;
658
659 /* now initialise a few default values associated with this smb socket */
660 smb_conn->negotiate.max_send = 0xFFFF;
661
662 /* this is the size that w2k uses, and it appears to be important for
663 good performance */
664 smb_conn->negotiate.max_recv = lpcfg_max_xmit(lp_ctx);
665
666 smb_conn->negotiate.zone_offset = get_time_zone(time(NULL));
667
668 smb_conn->config.nt_status_support = lpcfg_nt_status_support(lp_ctx);
669
670 status = smbsrv_init_sessions(smb_conn, UINT16_MAX);
671 NT_STATUS_NOT_OK_RETURN(status);
672
673 status = smbsrv_smb_init_tcons(smb_conn);
674 NT_STATUS_NOT_OK_RETURN(status);
675
676 smbsrv_init_signing(smb_conn);
677
678 return NT_STATUS_OK;
679 }
GSS-enabled samba4