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Commit | Line | Data |
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c3effa8b | 1 | /* |
cd68afe3 | 2 | Unix SMB/CIFS implementation. |
c3effa8b AT |
3 | process incoming packets - main loop |
4 | Copyright (C) Andrew Tridgell 1992-1998 | |
b91704d4 | 5 | Copyright (C) Volker Lendecke 2005-2007 |
8af7400d | 6 | |
c3effa8b AT |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
d824b98f | 9 | the Free Software Foundation; either version 3 of the License, or |
c3effa8b | 10 | (at your option) any later version. |
8af7400d | 11 | |
c3effa8b AT |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
8af7400d | 16 | |
c3effa8b | 17 | You should have received a copy of the GNU General Public License |
5e54558c | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. |
c3effa8b AT |
19 | */ |
20 | ||
21 | #include "includes.h" | |
12476223 | 22 | #include "../lib/tsocket/tsocket.h" |
0e771263 | 23 | #include "system/filesys.h" |
8c24ebf3 | 24 | #include "smbd/smbd.h" |
3dde0cbb | 25 | #include "smbd/globals.h" |
aff002e8 | 26 | #include "librpc/gen_ndr/netlogon.h" |
c7fe04ab | 27 | #include "../lib/async_req/async_sock.h" |
8e16d6db | 28 | #include "ctdbd_conn.h" |
b38d0542 | 29 | #include "../lib/util/select.h" |
2e8a85ec | 30 | #include "printing/queue_process.h" |
9758afd4 | 31 | #include "system/select.h" |
235f1485 | 32 | #include "passdb.h" |
af300a9f | 33 | #include "auth.h" |
b2af281e | 34 | #include "messages.h" |
165521e2 | 35 | #include "smbprofile.h" |
c233c214 | 36 | #include "rpc_server/spoolss/srv_spoolss_nt.h" |
27022587 | 37 | #include "libsmb/libsmb.h" |
27afb891 | 38 | #include "../lib/util/tevent_ntstatus.h" |
715933a3 SM |
39 | #include "../libcli/security/dom_sid.h" |
40 | #include "../libcli/security/security_token.h" | |
41 | #include "lib/id_cache.h" | |
c3effa8b | 42 | |
30191d1a | 43 | extern bool global_machine_password_needs_changing; |
c3effa8b | 44 | |
6d84b24d SM |
45 | /* Internal message queue for deferred opens. */ |
46 | struct pending_message_list { | |
47 | struct pending_message_list *next, *prev; | |
48 | struct timeval request_time; /* When was this first issued? */ | |
49 | struct smbd_server_connection *sconn; | |
50 | struct timed_event *te; | |
51 | struct smb_perfcount_data pcd; | |
52 | uint32_t seqnum; | |
53 | bool encrypted; | |
54 | bool processed; | |
55 | DATA_BLOB buf; | |
56 | DATA_BLOB private_data; | |
57 | }; | |
58 | ||
ae0c6cff VL |
59 | static void construct_reply_common(struct smb_request *req, const char *inbuf, |
60 | char *outbuf); | |
cb69d105 VL |
61 | static struct pending_message_list *get_deferred_open_message_smb( |
62 | struct smbd_server_connection *sconn, uint64_t mid); | |
5a33e906 | 63 | |
6800fdbb | 64 | static bool smbd_lock_socket_internal(struct smbd_server_connection *sconn) |
8de85546 | 65 | { |
cad0c004 VL |
66 | bool ok; |
67 | ||
46a48edc | 68 | if (sconn->smb1.echo_handler.socket_lock_fd == -1) { |
cad0c004 VL |
69 | return true; |
70 | } | |
71 | ||
46a48edc | 72 | sconn->smb1.echo_handler.ref_count++; |
6800fdbb | 73 | |
46a48edc | 74 | if (sconn->smb1.echo_handler.ref_count > 1) { |
6800fdbb JA |
75 | return true; |
76 | } | |
77 | ||
cad0c004 VL |
78 | DEBUG(10,("pid[%d] wait for socket lock\n", (int)sys_getpid())); |
79 | ||
da00021a VL |
80 | do { |
81 | ok = fcntl_lock( | |
82 | sconn->smb1.echo_handler.socket_lock_fd, | |
cad0c004 | 83 | SMB_F_SETLKW, 0, 0, F_WRLCK); |
da00021a VL |
84 | } while (!ok && (errno == EINTR)); |
85 | ||
cad0c004 | 86 | if (!ok) { |
efb22bf7 | 87 | DEBUG(1, ("fcntl_lock failed: %s\n", strerror(errno))); |
cad0c004 VL |
88 | return false; |
89 | } | |
90 | ||
91 | DEBUG(10,("pid[%d] got for socket lock\n", (int)sys_getpid())); | |
92 | ||
8de85546 SM |
93 | return true; |
94 | } | |
95 | ||
6800fdbb JA |
96 | void smbd_lock_socket(struct smbd_server_connection *sconn) |
97 | { | |
98 | if (!smbd_lock_socket_internal(sconn)) { | |
99 | exit_server_cleanly("failed to lock socket"); | |
100 | } | |
101 | } | |
102 | ||
103 | static bool smbd_unlock_socket_internal(struct smbd_server_connection *sconn) | |
8de85546 | 104 | { |
cad0c004 VL |
105 | bool ok; |
106 | ||
46a48edc | 107 | if (sconn->smb1.echo_handler.socket_lock_fd == -1) { |
cad0c004 VL |
108 | return true; |
109 | } | |
110 | ||
46a48edc | 111 | sconn->smb1.echo_handler.ref_count--; |
6800fdbb | 112 | |
46a48edc | 113 | if (sconn->smb1.echo_handler.ref_count > 0) { |
6800fdbb JA |
114 | return true; |
115 | } | |
116 | ||
da00021a VL |
117 | do { |
118 | ok = fcntl_lock( | |
119 | sconn->smb1.echo_handler.socket_lock_fd, | |
cad0c004 | 120 | SMB_F_SETLKW, 0, 0, F_UNLCK); |
da00021a VL |
121 | } while (!ok && (errno == EINTR)); |
122 | ||
cad0c004 | 123 | if (!ok) { |
efb22bf7 | 124 | DEBUG(1, ("fcntl_lock failed: %s\n", strerror(errno))); |
cad0c004 VL |
125 | return false; |
126 | } | |
127 | ||
128 | DEBUG(10,("pid[%d] unlocked socket\n", (int)sys_getpid())); | |
129 | ||
8de85546 SM |
130 | return true; |
131 | } | |
132 | ||
6800fdbb JA |
133 | void smbd_unlock_socket(struct smbd_server_connection *sconn) |
134 | { | |
135 | if (!smbd_unlock_socket_internal(sconn)) { | |
136 | exit_server_cleanly("failed to unlock socket"); | |
137 | } | |
138 | } | |
139 | ||
36441da4 JA |
140 | /* Accessor function for smb_read_error for smbd functions. */ |
141 | ||
9254bb4e JA |
142 | /**************************************************************************** |
143 | Send an smb to a fd. | |
144 | ****************************************************************************/ | |
145 | ||
1808dd0a | 146 | bool srv_send_smb(struct smbd_server_connection *sconn, char *buffer, |
c16c90a1 SM |
147 | bool do_signing, uint32_t seqnum, |
148 | bool do_encrypt, | |
149 | struct smb_perfcount_data *pcd) | |
9254bb4e | 150 | { |
54c51a66 | 151 | size_t len = 0; |
9254bb4e JA |
152 | size_t nwritten=0; |
153 | ssize_t ret; | |
154 | char *buf_out = buffer; | |
977aa660 | 155 | |
1808dd0a | 156 | smbd_lock_socket(sconn); |
9254bb4e | 157 | |
c16c90a1 SM |
158 | if (do_signing) { |
159 | /* Sign the outgoing packet if required. */ | |
1808dd0a | 160 | srv_calculate_sign_mac(sconn, buf_out, seqnum); |
c16c90a1 | 161 | } |
9254bb4e JA |
162 | |
163 | if (do_encrypt) { | |
7e70f853 | 164 | NTSTATUS status = srv_encrypt_buffer(sconn, buffer, &buf_out); |
9254bb4e JA |
165 | if (!NT_STATUS_IS_OK(status)) { |
166 | DEBUG(0, ("send_smb: SMB encryption failed " | |
167 | "on outgoing packet! Error %s\n", | |
168 | nt_errstr(status) )); | |
54c51a66 | 169 | goto out; |
9254bb4e JA |
170 | } |
171 | } | |
172 | ||
173 | len = smb_len(buf_out) + 4; | |
174 | ||
1808dd0a | 175 | ret = write_data(sconn->sock, buf_out+nwritten, len - nwritten); |
c344ad30 | 176 | if (ret <= 0) { |
40ae8b74 VL |
177 | |
178 | char addr[INET6_ADDRSTRLEN]; | |
179 | /* | |
180 | * Try and give an error message saying what | |
181 | * client failed. | |
182 | */ | |
51bc104c | 183 | DEBUG(1,("pid[%d] Error writing %d bytes to client %s. %d. (%s)\n", |
40ae8b74 | 184 | (int)sys_getpid(), (int)len, |
1808dd0a | 185 | get_peer_addr(sconn->sock, addr, sizeof(addr)), |
40ae8b74 VL |
186 | (int)ret, strerror(errno) )); |
187 | ||
08262fe9 | 188 | srv_free_enc_buffer(sconn, buf_out); |
c344ad30 | 189 | goto out; |
9254bb4e JA |
190 | } |
191 | ||
54c51a66 | 192 | SMB_PERFCOUNT_SET_MSGLEN_OUT(pcd, len); |
08262fe9 | 193 | srv_free_enc_buffer(sconn, buf_out); |
54c51a66 | 194 | out: |
195 | SMB_PERFCOUNT_END(pcd); | |
977aa660 | 196 | |
1808dd0a | 197 | smbd_unlock_socket(sconn); |
9254bb4e JA |
198 | return true; |
199 | } | |
200 | ||
afc93255 JA |
201 | /******************************************************************* |
202 | Setup the word count and byte count for a smb message. | |
afc93255 JA |
203 | ********************************************************************/ |
204 | ||
9254bb4e | 205 | int srv_set_message(char *buf, |
afc93255 JA |
206 | int num_words, |
207 | int num_bytes, | |
208 | bool zero) | |
209 | { | |
210 | if (zero && (num_words || num_bytes)) { | |
211 | memset(buf + smb_size,'\0',num_words*2 + num_bytes); | |
212 | } | |
213 | SCVAL(buf,smb_wct,num_words); | |
214 | SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes); | |
9254bb4e | 215 | smb_setlen(buf,(smb_size + num_words*2 + num_bytes - 4)); |
afc93255 JA |
216 | return (smb_size + num_words*2 + num_bytes); |
217 | } | |
218 | ||
b4b9918c VL |
219 | static bool valid_smb_header(struct smbd_server_connection *sconn, |
220 | const uint8_t *inbuf) | |
afc93255 | 221 | { |
f9ef138e | 222 | if (is_encrypted_packet(sconn, inbuf)) { |
9254bb4e | 223 | return true; |
afc93255 | 224 | } |
1510b7b8 VL |
225 | /* |
226 | * This used to be (strncmp(smb_base(inbuf),"\377SMB",4) == 0) | |
227 | * but it just looks weird to call strncmp for this one. | |
228 | */ | |
229 | return (IVAL(smb_base(inbuf), 0) == 0x424D53FF); | |
afc93255 JA |
230 | } |
231 | ||
695c4a7a JA |
232 | /* Socket functions for smbd packet processing. */ |
233 | ||
58fbb512 | 234 | static bool valid_packet_size(size_t len) |
695c4a7a JA |
235 | { |
236 | /* | |
237 | * A WRITEX with CAP_LARGE_WRITEX can be 64k worth of data plus 65 bytes | |
238 | * of header. Don't print the error if this fits.... JRA. | |
239 | */ | |
240 | ||
241 | if (len > (BUFFER_SIZE + LARGE_WRITEX_HDR_SIZE)) { | |
242 | DEBUG(0,("Invalid packet length! (%lu bytes).\n", | |
243 | (unsigned long)len)); | |
d36434f3 | 244 | return false; |
695c4a7a JA |
245 | } |
246 | return true; | |
247 | } | |
248 | ||
e604e137 VL |
249 | static NTSTATUS read_packet_remainder(int fd, char *buffer, |
250 | unsigned int timeout, ssize_t len) | |
695c4a7a | 251 | { |
9671547d VL |
252 | NTSTATUS status; |
253 | ||
48b1ee61 | 254 | if (len <= 0) { |
e604e137 | 255 | return NT_STATUS_OK; |
48b1ee61 | 256 | } |
695c4a7a | 257 | |
9671547d VL |
258 | status = read_fd_with_timeout(fd, buffer, len, len, timeout, NULL); |
259 | if (!NT_STATUS_IS_OK(status)) { | |
260 | char addr[INET6_ADDRSTRLEN]; | |
261 | DEBUG(0, ("read_fd_with_timeout failed for client %s read " | |
262 | "error = %s.\n", | |
263 | get_peer_addr(fd, addr, sizeof(addr)), | |
264 | nt_errstr(status))); | |
265 | } | |
266 | return status; | |
695c4a7a JA |
267 | } |
268 | ||
269 | /**************************************************************************** | |
270 | Attempt a zerocopy writeX read. We know here that len > smb_size-4 | |
271 | ****************************************************************************/ | |
272 | ||
273 | /* | |
274 | * Unfortunately, earlier versions of smbclient/libsmbclient | |
275 | * don't send this "standard" writeX header. I've fixed this | |
276 | * for 3.2 but we'll use the old method with earlier versions. | |
277 | * Windows and CIFSFS at least use this standard size. Not | |
278 | * sure about MacOSX. | |
279 | */ | |
280 | ||
281 | #define STANDARD_WRITE_AND_X_HEADER_SIZE (smb_size - 4 + /* basic header */ \ | |
282 | (2*14) + /* word count (including bcc) */ \ | |
283 | 1 /* pad byte */) | |
284 | ||
250b2b64 VL |
285 | static NTSTATUS receive_smb_raw_talloc_partial_read(TALLOC_CTX *mem_ctx, |
286 | const char lenbuf[4], | |
fa0de395 | 287 | struct smbd_server_connection *sconn, |
8b5d163d | 288 | int sock, |
fa0de395 | 289 | char **buffer, |
250b2b64 VL |
290 | unsigned int timeout, |
291 | size_t *p_unread, | |
292 | size_t *len_ret) | |
695c4a7a JA |
293 | { |
294 | /* Size of a WRITEX call (+4 byte len). */ | |
295 | char writeX_header[4 + STANDARD_WRITE_AND_X_HEADER_SIZE]; | |
296 | ssize_t len = smb_len_large(lenbuf); /* Could be a UNIX large writeX. */ | |
297 | ssize_t toread; | |
250b2b64 | 298 | NTSTATUS status; |
695c4a7a | 299 | |
227718cd | 300 | memcpy(writeX_header, lenbuf, 4); |
695c4a7a | 301 | |
43c766a1 | 302 | status = read_fd_with_timeout( |
8b5d163d | 303 | sock, writeX_header + 4, |
250b2b64 VL |
304 | STANDARD_WRITE_AND_X_HEADER_SIZE, |
305 | STANDARD_WRITE_AND_X_HEADER_SIZE, | |
306 | timeout, NULL); | |
695c4a7a | 307 | |
250b2b64 | 308 | if (!NT_STATUS_IS_OK(status)) { |
9671547d | 309 | DEBUG(0, ("read_fd_with_timeout failed for client %s read " |
a513086c AS |
310 | "error = %s.\n", |
311 | tsocket_address_string(sconn->remote_address, | |
312 | talloc_tos()), | |
9671547d | 313 | nt_errstr(status))); |
250b2b64 | 314 | return status; |
695c4a7a JA |
315 | } |
316 | ||
317 | /* | |
318 | * Ok - now try and see if this is a possible | |
319 | * valid writeX call. | |
320 | */ | |
321 | ||
fa0de395 | 322 | if (is_valid_writeX_buffer(sconn, (uint8_t *)writeX_header)) { |
695c4a7a JA |
323 | /* |
324 | * If the data offset is beyond what | |
325 | * we've read, drain the extra bytes. | |
326 | */ | |
327 | uint16_t doff = SVAL(writeX_header,smb_vwv11); | |
328 | ssize_t newlen; | |
329 | ||
330 | if (doff > STANDARD_WRITE_AND_X_HEADER_SIZE) { | |
331 | size_t drain = doff - STANDARD_WRITE_AND_X_HEADER_SIZE; | |
8b5d163d | 332 | if (drain_socket(sock, drain) != drain) { |
695c4a7a JA |
333 | smb_panic("receive_smb_raw_talloc_partial_read:" |
334 | " failed to drain pending bytes"); | |
335 | } | |
336 | } else { | |
337 | doff = STANDARD_WRITE_AND_X_HEADER_SIZE; | |
338 | } | |
339 | ||
340 | /* Spoof down the length and null out the bcc. */ | |
341 | set_message_bcc(writeX_header, 0); | |
342 | newlen = smb_len(writeX_header); | |
343 | ||
344 | /* Copy the header we've written. */ | |
345 | ||
8d4a8389 | 346 | *buffer = (char *)talloc_memdup(mem_ctx, |
695c4a7a JA |
347 | writeX_header, |
348 | sizeof(writeX_header)); | |
349 | ||
350 | if (*buffer == NULL) { | |
351 | DEBUG(0, ("Could not allocate inbuf of length %d\n", | |
352 | (int)sizeof(writeX_header))); | |
250b2b64 | 353 | return NT_STATUS_NO_MEMORY; |
695c4a7a JA |
354 | } |
355 | ||
356 | /* Work out the remaining bytes. */ | |
357 | *p_unread = len - STANDARD_WRITE_AND_X_HEADER_SIZE; | |
250b2b64 VL |
358 | *len_ret = newlen + 4; |
359 | return NT_STATUS_OK; | |
695c4a7a JA |
360 | } |
361 | ||
362 | if (!valid_packet_size(len)) { | |
250b2b64 | 363 | return NT_STATUS_INVALID_PARAMETER; |
695c4a7a JA |
364 | } |
365 | ||
366 | /* | |
367 | * Not a valid writeX call. Just do the standard | |
368 | * talloc and return. | |
369 | */ | |
370 | ||
3d151376 | 371 | *buffer = talloc_array(mem_ctx, char, len+4); |
695c4a7a JA |
372 | |
373 | if (*buffer == NULL) { | |
374 | DEBUG(0, ("Could not allocate inbuf of length %d\n", | |
375 | (int)len+4)); | |
250b2b64 | 376 | return NT_STATUS_NO_MEMORY; |
695c4a7a JA |
377 | } |
378 | ||
379 | /* Copy in what we already read. */ | |
380 | memcpy(*buffer, | |
381 | writeX_header, | |
382 | 4 + STANDARD_WRITE_AND_X_HEADER_SIZE); | |
383 | toread = len - STANDARD_WRITE_AND_X_HEADER_SIZE; | |
384 | ||
385 | if(toread > 0) { | |
e604e137 | 386 | status = read_packet_remainder( |
8b5d163d | 387 | sock, |
fa0de395 | 388 | (*buffer) + 4 + STANDARD_WRITE_AND_X_HEADER_SIZE, |
e604e137 VL |
389 | timeout, toread); |
390 | ||
391 | if (!NT_STATUS_IS_OK(status)) { | |
8ca459e0 JA |
392 | DEBUG(10, ("receive_smb_raw_talloc_partial_read: %s\n", |
393 | nt_errstr(status))); | |
250b2b64 | 394 | return status; |
695c4a7a JA |
395 | } |
396 | } | |
397 | ||
250b2b64 VL |
398 | *len_ret = len + 4; |
399 | return NT_STATUS_OK; | |
695c4a7a JA |
400 | } |
401 | ||
a2db154c VL |
402 | static NTSTATUS receive_smb_raw_talloc(TALLOC_CTX *mem_ctx, |
403 | struct smbd_server_connection *sconn, | |
8b5d163d | 404 | int sock, |
9fe66ddd VL |
405 | char **buffer, unsigned int timeout, |
406 | size_t *p_unread, size_t *plen) | |
695c4a7a JA |
407 | { |
408 | char lenbuf[4]; | |
0afbfa42 | 409 | size_t len; |
695c4a7a | 410 | int min_recv_size = lp_min_receive_file_size(); |
0afbfa42 | 411 | NTSTATUS status; |
695c4a7a | 412 | |
695c4a7a JA |
413 | *p_unread = 0; |
414 | ||
8b5d163d | 415 | status = read_smb_length_return_keepalive(sock, lenbuf, timeout, |
a2db154c | 416 | &len); |
0afbfa42 | 417 | if (!NT_STATUS_IS_OK(status)) { |
9fe66ddd | 418 | return status; |
695c4a7a JA |
419 | } |
420 | ||
dea223ba TP |
421 | if (CVAL(lenbuf,0) == 0 && min_recv_size && |
422 | (smb_len_large(lenbuf) > /* Could be a UNIX large writeX. */ | |
423 | (min_recv_size + STANDARD_WRITE_AND_X_HEADER_SIZE)) && | |
a2db154c VL |
424 | !srv_is_signing_active(sconn) && |
425 | sconn->smb1.echo_handler.trusted_fde == NULL) { | |
695c4a7a | 426 | |
8ca459e0 | 427 | return receive_smb_raw_talloc_partial_read( |
8b5d163d | 428 | mem_ctx, lenbuf, sconn, sock, buffer, timeout, |
fa0de395 | 429 | p_unread, plen); |
695c4a7a JA |
430 | } |
431 | ||
432 | if (!valid_packet_size(len)) { | |
9fe66ddd | 433 | return NT_STATUS_INVALID_PARAMETER; |
695c4a7a JA |
434 | } |
435 | ||
436 | /* | |
437 | * The +4 here can't wrap, we've checked the length above already. | |
438 | */ | |
439 | ||
3d151376 | 440 | *buffer = talloc_array(mem_ctx, char, len+4); |
695c4a7a JA |
441 | |
442 | if (*buffer == NULL) { | |
443 | DEBUG(0, ("Could not allocate inbuf of length %d\n", | |
444 | (int)len+4)); | |
9fe66ddd | 445 | return NT_STATUS_NO_MEMORY; |
695c4a7a JA |
446 | } |
447 | ||
448 | memcpy(*buffer, lenbuf, sizeof(lenbuf)); | |
449 | ||
8b5d163d | 450 | status = read_packet_remainder(sock, (*buffer)+4, timeout, len); |
e604e137 | 451 | if (!NT_STATUS_IS_OK(status)) { |
9fe66ddd | 452 | return status; |
695c4a7a JA |
453 | } |
454 | ||
9fe66ddd VL |
455 | *plen = len + 4; |
456 | return NT_STATUS_OK; | |
695c4a7a JA |
457 | } |
458 | ||
63e08ef8 VL |
459 | static NTSTATUS receive_smb_talloc(TALLOC_CTX *mem_ctx, |
460 | struct smbd_server_connection *sconn, | |
8b5d163d | 461 | int sock, |
e514cd0a VL |
462 | char **buffer, unsigned int timeout, |
463 | size_t *p_unread, bool *p_encrypted, | |
c16c90a1 | 464 | size_t *p_len, |
b2c107ff SM |
465 | uint32_t *seqnum, |
466 | bool trusted_channel) | |
695c4a7a | 467 | { |
47666c93 | 468 | size_t len = 0; |
9fe66ddd | 469 | NTSTATUS status; |
695c4a7a | 470 | |
9254bb4e JA |
471 | *p_encrypted = false; |
472 | ||
8b5d163d | 473 | status = receive_smb_raw_talloc(mem_ctx, sconn, sock, buffer, timeout, |
63e08ef8 | 474 | p_unread, &len); |
9fe66ddd | 475 | if (!NT_STATUS_IS_OK(status)) { |
b99becd4 CA |
476 | DEBUG(NT_STATUS_EQUAL(status, NT_STATUS_END_OF_FILE)?5:1, |
477 | ("receive_smb_raw_talloc failed for client %s " | |
478 | "read error = %s.\n", | |
479 | tsocket_address_string(sconn->remote_address, | |
480 | talloc_tos()), | |
481 | nt_errstr(status)) ); | |
e514cd0a | 482 | return status; |
695c4a7a JA |
483 | } |
484 | ||
f9ef138e | 485 | if (is_encrypted_packet(sconn, (uint8_t *)*buffer)) { |
d4c4705e | 486 | status = srv_decrypt_buffer(sconn, *buffer); |
afc93255 JA |
487 | if (!NT_STATUS_IS_OK(status)) { |
488 | DEBUG(0, ("receive_smb_talloc: SMB decryption failed on " | |
489 | "incoming packet! Error %s\n", | |
490 | nt_errstr(status) )); | |
e514cd0a | 491 | return status; |
afc93255 | 492 | } |
9254bb4e | 493 | *p_encrypted = true; |
afc93255 JA |
494 | } |
495 | ||
695c4a7a | 496 | /* Check the incoming SMB signature. */ |
63e08ef8 | 497 | if (!srv_check_sign_mac(sconn, *buffer, seqnum, trusted_channel)) { |
695c4a7a JA |
498 | DEBUG(0, ("receive_smb: SMB Signature verification failed on " |
499 | "incoming packet!\n")); | |
e514cd0a | 500 | return NT_STATUS_INVALID_NETWORK_RESPONSE; |
695c4a7a JA |
501 | } |
502 | ||
e514cd0a VL |
503 | *p_len = len; |
504 | return NT_STATUS_OK; | |
695c4a7a JA |
505 | } |
506 | ||
0bc56a2e VL |
507 | /* |
508 | * Initialize a struct smb_request from an inbuf | |
509 | */ | |
510 | ||
d7bc5fe7 VL |
511 | static bool init_smb_request(struct smb_request *req, |
512 | struct smbd_server_connection *sconn, | |
513 | const uint8 *inbuf, | |
9b4b9d26 VL |
514 | size_t unread_bytes, bool encrypted, |
515 | uint32_t seqnum) | |
0bc56a2e | 516 | { |
ed70bc0d JA |
517 | size_t req_size = smb_len(inbuf) + 4; |
518 | /* Ensure we have at least smb_size bytes. */ | |
a1f593cd JA |
519 | if (req_size < smb_size) { |
520 | DEBUG(0,("init_smb_request: invalid request size %u\n", | |
521 | (unsigned int)req_size )); | |
b7898148 | 522 | return false; |
a1f593cd | 523 | } |
7808a259 | 524 | req->cmd = CVAL(inbuf, smb_com); |
0bc56a2e VL |
525 | req->flags2 = SVAL(inbuf, smb_flg2); |
526 | req->smbpid = SVAL(inbuf, smb_pid); | |
79842437 | 527 | req->mid = (uint64_t)SVAL(inbuf, smb_mid); |
9b4b9d26 | 528 | req->seqnum = seqnum; |
0bc56a2e | 529 | req->vuid = SVAL(inbuf, smb_uid); |
cc6a4101 VL |
530 | req->tid = SVAL(inbuf, smb_tid); |
531 | req->wct = CVAL(inbuf, smb_wct); | |
f1dc8b28 | 532 | req->vwv = (const uint16_t *)(inbuf+smb_vwv); |
7f9d6f80 | 533 | req->buflen = smb_buflen(inbuf); |
4f41be35 | 534 | req->buf = (const uint8_t *)smb_buf_const(inbuf); |
c3250149 | 535 | req->unread_bytes = unread_bytes; |
9254bb4e | 536 | req->encrypted = encrypted; |
edfc7eaf | 537 | req->sconn = sconn; |
c8620180 | 538 | req->conn = conn_find(sconn,req->tid); |
d65afbe5 | 539 | req->chain_fsp = NULL; |
ba981128 | 540 | req->chain_outbuf = NULL; |
5135ebd6 | 541 | req->done = false; |
08b24e92 | 542 | req->smb2req = NULL; |
54c51a66 | 543 | smb_init_perfcount_data(&req->pcd); |
c3250149 | 544 | |
a662a62e | 545 | /* Ensure we have at least wct words and 2 bytes of bcc. */ |
a1f593cd JA |
546 | if (smb_size + req->wct*2 > req_size) { |
547 | DEBUG(0,("init_smb_request: invalid wct number %u (size %u)\n", | |
548 | (unsigned int)req->wct, | |
549 | (unsigned int)req_size)); | |
b7898148 | 550 | return false; |
a1f593cd | 551 | } |
a662a62e | 552 | /* Ensure bcc is correct. */ |
4f41be35 | 553 | if (((const uint8_t *)smb_buf_const(inbuf)) + req->buflen > inbuf + req_size) { |
a662a62e JA |
554 | DEBUG(0,("init_smb_request: invalid bcc number %u " |
555 | "(wct = %u, size %u)\n", | |
7f9d6f80 | 556 | (unsigned int)req->buflen, |
a662a62e JA |
557 | (unsigned int)req->wct, |
558 | (unsigned int)req_size)); | |
b7898148 | 559 | return false; |
a662a62e | 560 | } |
54c51a66 | 561 | |
cc6a4101 | 562 | req->outbuf = NULL; |
b7898148 | 563 | return true; |
0bc56a2e VL |
564 | } |
565 | ||
aeb798c3 SM |
566 | static void process_smb(struct smbd_server_connection *conn, |
567 | uint8_t *inbuf, size_t nread, size_t unread_bytes, | |
c16c90a1 SM |
568 | uint32_t seqnum, bool encrypted, |
569 | struct smb_perfcount_data *deferred_pcd); | |
aeb798c3 SM |
570 | |
571 | static void smbd_deferred_open_timer(struct event_context *ev, | |
572 | struct timed_event *te, | |
573 | struct timeval _tval, | |
574 | void *private_data) | |
575 | { | |
576 | struct pending_message_list *msg = talloc_get_type(private_data, | |
577 | struct pending_message_list); | |
8b2b7d1c | 578 | struct smbd_server_connection *sconn = msg->sconn; |
aeb798c3 | 579 | TALLOC_CTX *mem_ctx = talloc_tos(); |
79842437 | 580 | uint64_t mid = (uint64_t)SVAL(msg->buf.data,smb_mid); |
aeb798c3 SM |
581 | uint8_t *inbuf; |
582 | ||
50aa8a4a VL |
583 | inbuf = (uint8_t *)talloc_memdup(mem_ctx, msg->buf.data, |
584 | msg->buf.length); | |
aeb798c3 SM |
585 | if (inbuf == NULL) { |
586 | exit_server("smbd_deferred_open_timer: talloc failed\n"); | |
587 | return; | |
588 | } | |
589 | ||
590 | /* We leave this message on the queue so the open code can | |
591 | know this is a retry. */ | |
79842437 JA |
592 | DEBUG(5,("smbd_deferred_open_timer: trigger mid %llu.\n", |
593 | (unsigned long long)mid )); | |
8a6b90d4 JA |
594 | |
595 | /* Mark the message as processed so this is not | |
596 | * re-processed in error. */ | |
597 | msg->processed = true; | |
aeb798c3 | 598 | |
8b2b7d1c | 599 | process_smb(sconn, inbuf, |
aeb798c3 | 600 | msg->buf.length, 0, |
c16c90a1 | 601 | msg->seqnum, msg->encrypted, &msg->pcd); |
8a6b90d4 JA |
602 | |
603 | /* If it's still there and was processed, remove it. */ | |
8b2b7d1c | 604 | msg = get_deferred_open_message_smb(sconn, mid); |
8a6b90d4 | 605 | if (msg && msg->processed) { |
8b2b7d1c | 606 | remove_deferred_open_message_smb(sconn, mid); |
8a6b90d4 | 607 | } |
aeb798c3 | 608 | } |
aab2fe02 JA |
609 | |
610 | /**************************************************************************** | |
e5a95132 GJC |
611 | Function to push a message onto the tail of a linked list of smb messages ready |
612 | for processing. | |
aab2fe02 JA |
613 | ****************************************************************************/ |
614 | ||
30191d1a | 615 | static bool push_queued_message(struct smb_request *req, |
54abd2aa GC |
616 | struct timeval request_time, |
617 | struct timeval end_time, | |
618 | char *private_data, size_t private_len) | |
aab2fe02 | 619 | { |
b578db69 | 620 | int msg_len = smb_len(req->inbuf) + 4; |
54abd2aa GC |
621 | struct pending_message_list *msg; |
622 | ||
ad0a07c5 | 623 | msg = talloc_zero(NULL, struct pending_message_list); |
aab2fe02 | 624 | |
1eff0523 JA |
625 | if(msg == NULL) { |
626 | DEBUG(0,("push_message: malloc fail (1)\n")); | |
627 | return False; | |
628 | } | |
8b2b7d1c | 629 | msg->sconn = req->sconn; |
aab2fe02 | 630 | |
b578db69 | 631 | msg->buf = data_blob_talloc(msg, req->inbuf, msg_len); |
2fc57c9a | 632 | if(msg->buf.data == NULL) { |
1eff0523 | 633 | DEBUG(0,("push_message: malloc fail (2)\n")); |
fb5362c0 | 634 | TALLOC_FREE(msg); |
1eff0523 JA |
635 | return False; |
636 | } | |
aab2fe02 | 637 | |
54abd2aa | 638 | msg->request_time = request_time; |
c16c90a1 | 639 | msg->seqnum = req->seqnum; |
9254bb4e | 640 | msg->encrypted = req->encrypted; |
8a6b90d4 | 641 | msg->processed = false; |
54c51a66 | 642 | SMB_PERFCOUNT_DEFER_OP(&req->pcd, &msg->pcd); |
2fc57c9a | 643 | |
19ca97a7 | 644 | if (private_data) { |
54abd2aa GC |
645 | msg->private_data = data_blob_talloc(msg, private_data, |
646 | private_len); | |
2fc57c9a JA |
647 | if (msg->private_data.data == NULL) { |
648 | DEBUG(0,("push_message: malloc fail (3)\n")); | |
fb5362c0 | 649 | TALLOC_FREE(msg); |
b6fb0462 | 650 | return False; |
2fc57c9a JA |
651 | } |
652 | } | |
aab2fe02 | 653 | |
16cfc724 SM |
654 | msg->te = tevent_add_timer(msg->sconn->ev_ctx, |
655 | msg, | |
656 | end_time, | |
657 | smbd_deferred_open_timer, | |
658 | msg); | |
aeb798c3 SM |
659 | if (!msg->te) { |
660 | DEBUG(0,("push_message: event_add_timed failed\n")); | |
661 | TALLOC_FREE(msg); | |
662 | return false; | |
663 | } | |
664 | ||
d20e968c VL |
665 | DLIST_ADD_END(req->sconn->deferred_open_queue, msg, |
666 | struct pending_message_list *); | |
aab2fe02 | 667 | |
54abd2aa GC |
668 | DEBUG(10,("push_message: pushed message length %u on " |
669 | "deferred_open_queue\n", (unsigned int)msg_len)); | |
2fc57c9a | 670 | |
1eff0523 | 671 | return True; |
aab2fe02 JA |
672 | } |
673 | ||
2fc57c9a JA |
674 | /**************************************************************************** |
675 | Function to delete a sharing violation open message by mid. | |
676 | ****************************************************************************/ | |
677 | ||
04253dfd VL |
678 | void remove_deferred_open_message_smb(struct smbd_server_connection *sconn, |
679 | uint64_t mid) | |
2fc57c9a JA |
680 | { |
681 | struct pending_message_list *pml; | |
682 | ||
04253dfd VL |
683 | if (sconn->using_smb2) { |
684 | remove_deferred_open_message_smb2(sconn, mid); | |
e15939b4 JA |
685 | return; |
686 | } | |
687 | ||
d20e968c | 688 | for (pml = sconn->deferred_open_queue; pml; pml = pml->next) { |
79842437 | 689 | if (mid == (uint64_t)SVAL(pml->buf.data,smb_mid)) { |
e15939b4 | 690 | DEBUG(10,("remove_deferred_open_message_smb: " |
79842437 JA |
691 | "deleting mid %llu len %u\n", |
692 | (unsigned long long)mid, | |
54abd2aa | 693 | (unsigned int)pml->buf.length )); |
d20e968c | 694 | DLIST_REMOVE(sconn->deferred_open_queue, pml); |
fb5362c0 | 695 | TALLOC_FREE(pml); |
2fc57c9a JA |
696 | return; |
697 | } | |
698 | } | |
699 | } | |
700 | ||
701 | /**************************************************************************** | |
702 | Move a sharing violation open retry message to the front of the list and | |
703 | schedule it for immediate processing. | |
704 | ****************************************************************************/ | |
705 | ||
502fdae7 VL |
706 | void schedule_deferred_open_message_smb(struct smbd_server_connection *sconn, |
707 | uint64_t mid) | |
2fc57c9a JA |
708 | { |
709 | struct pending_message_list *pml; | |
710 | int i = 0; | |
711 | ||
502fdae7 VL |
712 | if (sconn->using_smb2) { |
713 | schedule_deferred_open_message_smb2(sconn, mid); | |
3413cf7a JA |
714 | return; |
715 | } | |
716 | ||
d20e968c | 717 | for (pml = sconn->deferred_open_queue; pml; pml = pml->next) { |
79842437 | 718 | uint64_t msg_mid = (uint64_t)SVAL(pml->buf.data,smb_mid); |
aeb798c3 | 719 | |
79842437 JA |
720 | DEBUG(10,("schedule_deferred_open_message_smb: [%d] " |
721 | "msg_mid = %llu\n", | |
722 | i++, | |
723 | (unsigned long long)msg_mid )); | |
aeb798c3 | 724 | |
2fc57c9a | 725 | if (mid == msg_mid) { |
aeb798c3 SM |
726 | struct timed_event *te; |
727 | ||
8a6b90d4 JA |
728 | if (pml->processed) { |
729 | /* A processed message should not be | |
730 | * rescheduled. */ | |
e15939b4 | 731 | DEBUG(0,("schedule_deferred_open_message_smb: LOGIC ERROR " |
79842437 JA |
732 | "message mid %llu was already processed\n", |
733 | (unsigned long long)msg_mid )); | |
8a6b90d4 JA |
734 | continue; |
735 | } | |
736 | ||
79842437 JA |
737 | DEBUG(10,("schedule_deferred_open_message_smb: " |
738 | "scheduling mid %llu\n", | |
739 | (unsigned long long)mid )); | |
aeb798c3 | 740 | |
16cfc724 SM |
741 | te = tevent_add_timer(pml->sconn->ev_ctx, |
742 | pml, | |
743 | timeval_zero(), | |
744 | smbd_deferred_open_timer, | |
745 | pml); | |
aeb798c3 | 746 | if (!te) { |
e15939b4 | 747 | DEBUG(10,("schedule_deferred_open_message_smb: " |
79842437 JA |
748 | "event_add_timed() failed, " |
749 | "skipping mid %llu\n", | |
750 | (unsigned long long)msg_mid )); | |
aeb798c3 SM |
751 | } |
752 | ||
753 | TALLOC_FREE(pml->te); | |
754 | pml->te = te; | |
d20e968c | 755 | DLIST_PROMOTE(sconn->deferred_open_queue, pml); |
2fc57c9a JA |
756 | return; |
757 | } | |
758 | } | |
759 | ||
79842437 JA |
760 | DEBUG(10,("schedule_deferred_open_message_smb: failed to " |
761 | "find message mid %llu\n", | |
762 | (unsigned long long)mid )); | |
2fc57c9a JA |
763 | } |
764 | ||
765 | /**************************************************************************** | |
8a6b90d4 | 766 | Return true if this mid is on the deferred queue and was not yet processed. |
2fc57c9a JA |
767 | ****************************************************************************/ |
768 | ||
f9d183f9 | 769 | bool open_was_deferred(struct smbd_server_connection *sconn, uint64_t mid) |
2fc57c9a JA |
770 | { |
771 | struct pending_message_list *pml; | |
3e0f5862 | 772 | |
f9d183f9 VL |
773 | if (sconn->using_smb2) { |
774 | return open_was_deferred_smb2(sconn, mid); | |
e15939b4 JA |
775 | } |
776 | ||
d20e968c | 777 | for (pml = sconn->deferred_open_queue; pml; pml = pml->next) { |
79842437 | 778 | if (((uint64_t)SVAL(pml->buf.data,smb_mid)) == mid && !pml->processed) { |
2fc57c9a JA |
779 | return True; |
780 | } | |
781 | } | |
782 | return False; | |
783 | } | |
784 | ||
785 | /**************************************************************************** | |
786 | Return the message queued by this mid. | |
787 | ****************************************************************************/ | |
788 | ||
cb69d105 VL |
789 | static struct pending_message_list *get_deferred_open_message_smb( |
790 | struct smbd_server_connection *sconn, uint64_t mid) | |
2fc57c9a JA |
791 | { |
792 | struct pending_message_list *pml; | |
3e0f5862 | 793 | |
d20e968c | 794 | for (pml = sconn->deferred_open_queue; pml; pml = pml->next) { |
79842437 | 795 | if (((uint64_t)SVAL(pml->buf.data,smb_mid)) == mid) { |
2fc57c9a JA |
796 | return pml; |
797 | } | |
798 | } | |
799 | return NULL; | |
800 | } | |
801 | ||
e15939b4 JA |
802 | /**************************************************************************** |
803 | Get the state data queued by this mid. | |
804 | ****************************************************************************/ | |
805 | ||
8f67f873 | 806 | bool get_deferred_open_message_state(struct smb_request *smbreq, |
e15939b4 JA |
807 | struct timeval *p_request_time, |
808 | void **pp_state) | |
809 | { | |
810 | struct pending_message_list *pml; | |
811 | ||
8b2b7d1c | 812 | if (smbreq->sconn->using_smb2) { |
8f67f873 | 813 | return get_deferred_open_message_state_smb2(smbreq->smb2req, |
e15939b4 JA |
814 | p_request_time, |
815 | pp_state); | |
816 | } | |
817 | ||
cb69d105 | 818 | pml = get_deferred_open_message_smb(smbreq->sconn, smbreq->mid); |
e15939b4 JA |
819 | if (!pml) { |
820 | return false; | |
821 | } | |
822 | if (p_request_time) { | |
823 | *p_request_time = pml->request_time; | |
824 | } | |
825 | if (pp_state) { | |
826 | *pp_state = (void *)pml->private_data.data; | |
827 | } | |
828 | return true; | |
829 | } | |
830 | ||
2fc57c9a | 831 | /**************************************************************************** |
54abd2aa GC |
832 | Function to push a deferred open smb message onto a linked list of local smb |
833 | messages ready for processing. | |
834 | ****************************************************************************/ | |
835 | ||
e15939b4 | 836 | bool push_deferred_open_message_smb(struct smb_request *req, |
54abd2aa GC |
837 | struct timeval request_time, |
838 | struct timeval timeout, | |
2bbb8c91 | 839 | struct file_id id, |
54abd2aa GC |
840 | char *private_data, size_t priv_len) |
841 | { | |
842 | struct timeval end_time; | |
843 | ||
e15939b4 | 844 | if (req->smb2req) { |
8f67f873 | 845 | return push_deferred_open_message_smb2(req->smb2req, |
e15939b4 JA |
846 | request_time, |
847 | timeout, | |
2bbb8c91 | 848 | id, |
e15939b4 JA |
849 | private_data, |
850 | priv_len); | |
851 | } | |
852 | ||
c3250149 | 853 | if (req->unread_bytes) { |
e15939b4 | 854 | DEBUG(0,("push_deferred_open_message_smb: logic error ! " |
c3250149 JA |
855 | "unread_bytes = %u\n", |
856 | (unsigned int)req->unread_bytes )); | |
e15939b4 | 857 | smb_panic("push_deferred_open_message_smb: " |
c3250149 JA |
858 | "logic error unread_bytes != 0" ); |
859 | } | |
860 | ||
54abd2aa GC |
861 | end_time = timeval_sum(&request_time, &timeout); |
862 | ||
79842437 JA |
863 | DEBUG(10,("push_deferred_open_message_smb: pushing message " |
864 | "len %u mid %llu timeout time [%u.%06u]\n", | |
865 | (unsigned int) smb_len(req->inbuf)+4, | |
866 | (unsigned long long)req->mid, | |
867 | (unsigned int)end_time.tv_sec, | |
868 | (unsigned int)end_time.tv_usec)); | |
54abd2aa | 869 | |
b578db69 | 870 | return push_queued_message(req, request_time, end_time, |
54abd2aa GC |
871 | private_data, priv_len); |
872 | } | |
873 | ||
ac61f650 SM |
874 | static void smbd_sig_term_handler(struct tevent_context *ev, |
875 | struct tevent_signal *se, | |
876 | int signum, | |
877 | int count, | |
878 | void *siginfo, | |
879 | void *private_data) | |
880 | { | |
881 | exit_server_cleanly("termination signal"); | |
882 | } | |
883 | ||
8a834642 | 884 | void smbd_setup_sig_term_handler(struct smbd_server_connection *sconn) |
ac61f650 SM |
885 | { |
886 | struct tevent_signal *se; | |
887 | ||
8a834642 SM |
888 | se = tevent_add_signal(sconn->ev_ctx, |
889 | sconn, | |
ac61f650 SM |
890 | SIGTERM, 0, |
891 | smbd_sig_term_handler, | |
8a834642 | 892 | sconn); |
ac61f650 SM |
893 | if (!se) { |
894 | exit_server("failed to setup SIGTERM handler"); | |
895 | } | |
896 | } | |
897 | ||
898 | static void smbd_sig_hup_handler(struct tevent_context *ev, | |
899 | struct tevent_signal *se, | |
900 | int signum, | |
901 | int count, | |
902 | void *siginfo, | |
903 | void *private_data) | |
904 | { | |
290ce331 SM |
905 | struct smbd_server_connection *sconn = |
906 | talloc_get_type_abort(private_data, | |
907 | struct smbd_server_connection); | |
908 | ||
ac61f650 SM |
909 | change_to_root_user(); |
910 | DEBUG(1,("Reloading services after SIGHUP\n")); | |
03455519 | 911 | reload_services(sconn, conn_snum_used, false); |
ac61f650 SM |
912 | } |
913 | ||
290ce331 | 914 | void smbd_setup_sig_hup_handler(struct smbd_server_connection *sconn) |
ac61f650 SM |
915 | { |
916 | struct tevent_signal *se; | |
917 | ||
290ce331 SM |
918 | se = tevent_add_signal(sconn->ev_ctx, |
919 | sconn, | |
920 | SIGHUP, 0, | |
921 | smbd_sig_hup_handler, | |
922 | sconn); | |
ac61f650 SM |
923 | if (!se) { |
924 | exit_server("failed to setup SIGHUP handler"); | |
925 | } | |
926 | } | |
927 | ||
e412b8bf SM |
928 | static void smbd_conf_updated(struct messaging_context *msg, |
929 | void *private_data, | |
930 | uint32_t msg_type, | |
931 | struct server_id server_id, | |
932 | DATA_BLOB *data) | |
933 | { | |
934 | struct smbd_server_connection *sconn = | |
935 | talloc_get_type_abort(private_data, | |
936 | struct smbd_server_connection); | |
937 | ||
938 | DEBUG(10,("smbd_conf_updated: Got message saying smb.conf was " | |
939 | "updated. Reloading.\n")); | |
940 | change_to_root_user(); | |
03455519 | 941 | reload_services(sconn, conn_snum_used, false); |
e412b8bf SM |
942 | } |
943 | ||
22dbd677 JA |
944 | /* |
945 | * Only allow 5 outstanding trans requests. We're allocating memory, so | |
946 | * prevent a DoS. | |
947 | */ | |
aab2fe02 | 948 | |
79842437 | 949 | NTSTATUS allow_new_trans(struct trans_state *list, uint64_t mid) |
c3effa8b | 950 | { |
22dbd677 JA |
951 | int count = 0; |
952 | for (; list != NULL; list = list->next) { | |
c3effa8b | 953 | |
22dbd677 JA |
954 | if (list->mid == mid) { |
955 | return NT_STATUS_INVALID_PARAMETER; | |
956 | } | |
957 | ||
958 | count += 1; | |
959 | } | |
960 | if (count > 5) { | |
961 | return NT_STATUS_INSUFFICIENT_RESOURCES; | |
962 | } | |
c3effa8b | 963 | |
22dbd677 | 964 | return NT_STATUS_OK; |
c3effa8b AT |
965 | } |
966 | ||
c3effa8b AT |
967 | /* |
968 | These flags determine some of the permissions required to do an operation | |
969 | ||
970 | Note that I don't set NEED_WRITE on some write operations because they | |
971 | are used by some brain-dead clients when printing, and I don't want to | |
972 | force write permissions on print services. | |
973 | */ | |
974 | #define AS_USER (1<<0) | |
ce61fb21 | 975 | #define NEED_WRITE (1<<1) /* Must be paired with AS_USER */ |
c3effa8b | 976 | #define TIME_INIT (1<<2) |
ce61fb21 JA |
977 | #define CAN_IPC (1<<3) /* Must be paired with AS_USER */ |
978 | #define AS_GUEST (1<<5) /* Must *NOT* be paired with AS_USER */ | |
54abd2aa | 979 | #define DO_CHDIR (1<<6) |
c3effa8b AT |
980 | |
981 | /* | |
982 | define a list of possible SMB messages and their corresponding | |
983 | functions. Any message that has a NULL function is unimplemented - | |
984 | please feel free to contribute implementations! | |
985 | */ | |
1eff0523 JA |
986 | static const struct smb_message_struct { |
987 | const char *name; | |
48d3a1d2 | 988 | void (*fn)(struct smb_request *req); |
1eff0523 JA |
989 | int flags; |
990 | } smb_messages[256] = { | |
918c3ebe | 991 | |
b578db69 VL |
992 | /* 0x00 */ { "SMBmkdir",reply_mkdir,AS_USER | NEED_WRITE}, |
993 | /* 0x01 */ { "SMBrmdir",reply_rmdir,AS_USER | NEED_WRITE}, | |
994 | /* 0x02 */ { "SMBopen",reply_open,AS_USER }, | |
995 | /* 0x03 */ { "SMBcreate",reply_mknew,AS_USER}, | |
996 | /* 0x04 */ { "SMBclose",reply_close,AS_USER | CAN_IPC }, | |
997 | /* 0x05 */ { "SMBflush",reply_flush,AS_USER}, | |
998 | /* 0x06 */ { "SMBunlink",reply_unlink,AS_USER | NEED_WRITE }, | |
999 | /* 0x07 */ { "SMBmv",reply_mv,AS_USER | NEED_WRITE }, | |
1000 | /* 0x08 */ { "SMBgetatr",reply_getatr,AS_USER}, | |
1001 | /* 0x09 */ { "SMBsetatr",reply_setatr,AS_USER | NEED_WRITE}, | |
1002 | /* 0x0a */ { "SMBread",reply_read,AS_USER}, | |
1003 | /* 0x0b */ { "SMBwrite",reply_write,AS_USER | CAN_IPC }, | |
1004 | /* 0x0c */ { "SMBlock",reply_lock,AS_USER}, | |
1005 | /* 0x0d */ { "SMBunlock",reply_unlock,AS_USER}, | |
1006 | /* 0x0e */ { "SMBctemp",reply_ctemp,AS_USER }, | |
1007 | /* 0x0f */ { "SMBmknew",reply_mknew,AS_USER}, | |
1008 | /* 0x10 */ { "SMBcheckpath",reply_checkpath,AS_USER}, | |
1009 | /* 0x11 */ { "SMBexit",reply_exit,DO_CHDIR}, | |
1010 | /* 0x12 */ { "SMBlseek",reply_lseek,AS_USER}, | |
1011 | /* 0x13 */ { "SMBlockread",reply_lockread,AS_USER}, | |
1012 | /* 0x14 */ { "SMBwriteunlock",reply_writeunlock,AS_USER}, | |
1013 | /* 0x15 */ { NULL, NULL, 0 }, | |
1014 | /* 0x16 */ { NULL, NULL, 0 }, | |
1015 | /* 0x17 */ { NULL, NULL, 0 }, | |
1016 | /* 0x18 */ { NULL, NULL, 0 }, | |
1017 | /* 0x19 */ { NULL, NULL, 0 }, | |
1018 | /* 0x1a */ { "SMBreadbraw",reply_readbraw,AS_USER}, | |
1019 | /* 0x1b */ { "SMBreadBmpx",reply_readbmpx,AS_USER}, | |
1020 | /* 0x1c */ { "SMBreadBs",reply_readbs,AS_USER }, | |
1021 | /* 0x1d */ { "SMBwritebraw",reply_writebraw,AS_USER}, | |
1022 | /* 0x1e */ { "SMBwriteBmpx",reply_writebmpx,AS_USER}, | |
1023 | /* 0x1f */ { "SMBwriteBs",reply_writebs,AS_USER}, | |
1024 | /* 0x20 */ { "SMBwritec", NULL,0}, | |
1025 | /* 0x21 */ { NULL, NULL, 0 }, | |
1026 | /* 0x22 */ { "SMBsetattrE",reply_setattrE,AS_USER | NEED_WRITE }, | |
1027 | /* 0x23 */ { "SMBgetattrE",reply_getattrE,AS_USER }, | |
1028 | /* 0x24 */ { "SMBlockingX",reply_lockingX,AS_USER }, | |
1029 | /* 0x25 */ { "SMBtrans",reply_trans,AS_USER | CAN_IPC }, | |
1030 | /* 0x26 */ { "SMBtranss",reply_transs,AS_USER | CAN_IPC}, | |
1031 | /* 0x27 */ { "SMBioctl",reply_ioctl,0}, | |
1032 | /* 0x28 */ { "SMBioctls", NULL,AS_USER}, | |
1033 | /* 0x29 */ { "SMBcopy",reply_copy,AS_USER | NEED_WRITE }, | |
1034 | /* 0x2a */ { "SMBmove", NULL,AS_USER | NEED_WRITE }, | |
1035 | /* 0x2b */ { "SMBecho",reply_echo,0}, | |
1036 | /* 0x2c */ { "SMBwriteclose",reply_writeclose,AS_USER}, | |
1037 | /* 0x2d */ { "SMBopenX",reply_open_and_X,AS_USER | CAN_IPC }, | |
1038 | /* 0x2e */ { "SMBreadX",reply_read_and_X,AS_USER | CAN_IPC }, | |
1039 | /* 0x2f */ { "SMBwriteX",reply_write_and_X,AS_USER | CAN_IPC }, | |
1040 | /* 0x30 */ { NULL, NULL, 0 }, | |
1041 | /* 0x31 */ { NULL, NULL, 0 }, | |
1042 | /* 0x32 */ { "SMBtrans2",reply_trans2, AS_USER | CAN_IPC }, | |
7716ad68 | 1043 | /* 0x33 */ { "SMBtranss2",reply_transs2, AS_USER | CAN_IPC }, |
b578db69 VL |
1044 | /* 0x34 */ { "SMBfindclose",reply_findclose,AS_USER}, |
1045 | /* 0x35 */ { "SMBfindnclose",reply_findnclose,AS_USER}, | |
1046 | /* 0x36 */ { NULL, NULL, 0 }, | |
1047 | /* 0x37 */ { NULL, NULL, 0 }, | |
1048 | /* 0x38 */ { NULL, NULL, 0 }, | |
1049 | /* 0x39 */ { NULL, NULL, 0 }, | |
1050 | /* 0x3a */ { NULL, NULL, 0 }, | |
1051 | /* 0x3b */ { NULL, NULL, 0 }, | |
1052 | /* 0x3c */ { NULL, NULL, 0 }, | |
1053 | /* 0x3d */ { NULL, NULL, 0 }, | |
1054 | /* 0x3e */ { NULL, NULL, 0 }, | |
1055 | /* 0x3f */ { NULL, NULL, 0 }, | |
1056 | /* 0x40 */ { NULL, NULL, 0 }, | |
1057 | /* 0x41 */ { NULL, NULL, 0 }, | |
1058 | /* 0x42 */ { NULL, NULL, 0 }, | |
1059 | /* 0x43 */ { NULL, NULL, 0 }, | |
1060 | /* 0x44 */ { NULL, NULL, 0 }, | |
1061 | /* 0x45 */ { NULL, NULL, 0 }, | |
1062 | /* 0x46 */ { NULL, NULL, 0 }, | |
1063 | /* 0x47 */ { NULL, NULL, 0 }, | |
1064 | /* 0x48 */ { NULL, NULL, 0 }, | |
1065 | /* 0x49 */ { NULL, NULL, 0 }, | |
1066 | /* 0x4a */ { NULL, NULL, 0 }, | |
1067 | /* 0x4b */ { NULL, NULL, 0 }, | |
1068 | /* 0x4c */ { NULL, NULL, 0 }, | |
1069 | /* 0x4d */ { NULL, NULL, 0 }, | |
1070 | /* 0x4e */ { NULL, NULL, 0 }, | |
1071 | /* 0x4f */ { NULL, NULL, 0 }, | |
1072 | /* 0x50 */ { NULL, NULL, 0 }, | |
1073 | /* 0x51 */ { NULL, NULL, 0 }, | |
1074 | /* 0x52 */ { NULL, NULL, 0 }, | |
1075 | /* 0x53 */ { NULL, NULL, 0 }, | |
1076 | /* 0x54 */ { NULL, NULL, 0 }, | |
1077 | /* 0x55 */ { NULL, NULL, 0 }, | |
1078 | /* 0x56 */ { NULL, NULL, 0 }, | |
1079 | /* 0x57 */ { NULL, NULL, 0 }, | |
1080 | /* 0x58 */ { NULL, NULL, 0 }, | |
1081 | /* 0x59 */ { NULL, NULL, 0 }, | |
1082 | /* 0x5a */ { NULL, NULL, 0 }, | |
1083 | /* 0x5b */ { NULL, NULL, 0 }, | |
1084 | /* 0x5c */ { NULL, NULL, 0 }, | |
1085 | /* 0x5d */ { NULL, NULL, 0 }, | |
1086 | /* 0x5e */ { NULL, NULL, 0 }, | |
1087 | /* 0x5f */ { NULL, NULL, 0 }, | |
1088 | /* 0x60 */ { NULL, NULL, 0 }, | |
1089 | /* 0x61 */ { NULL, NULL, 0 }, | |
1090 | /* 0x62 */ { NULL, NULL, 0 }, | |
1091 | /* 0x63 */ { NULL, NULL, 0 }, | |
1092 | /* 0x64 */ { NULL, NULL, 0 }, | |
1093 | /* 0x65 */ { NULL, NULL, 0 }, | |
1094 | /* 0x66 */ { NULL, NULL, 0 }, | |
1095 | /* 0x67 */ { NULL, NULL, 0 }, | |
1096 | /* 0x68 */ { NULL, NULL, 0 }, | |
1097 | /* 0x69 */ { NULL, NULL, 0 }, | |
1098 | /* 0x6a */ { NULL, NULL, 0 }, | |
1099 | /* 0x6b */ { NULL, NULL, 0 }, | |
1100 | /* 0x6c */ { NULL, NULL, 0 }, | |
1101 | /* 0x6d */ { NULL, NULL, 0 }, | |
1102 | /* 0x6e */ { NULL, NULL, 0 }, | |
1103 | /* 0x6f */ { NULL, NULL, 0 }, | |
1104 | /* 0x70 */ { "SMBtcon",reply_tcon,0}, | |
1105 | /* 0x71 */ { "SMBtdis",reply_tdis,DO_CHDIR}, | |
1106 | /* 0x72 */ { "SMBnegprot",reply_negprot,0}, | |
1107 | /* 0x73 */ { "SMBsesssetupX",reply_sesssetup_and_X,0}, | |
1108 | /* 0x74 */ { "SMBulogoffX",reply_ulogoffX, 0}, /* ulogoff doesn't give a valid TID */ | |
1109 | /* 0x75 */ { "SMBtconX",reply_tcon_and_X,0}, | |
1110 | /* 0x76 */ { NULL, NULL, 0 }, | |
1111 | /* 0x77 */ { NULL, NULL, 0 }, | |
1112 | /* 0x78 */ { NULL, NULL, 0 }, | |
1113 | /* 0x79 */ { NULL, NULL, 0 }, | |
1114 | /* 0x7a */ { NULL, NULL, 0 }, | |
1115 | /* 0x7b */ { NULL, NULL, 0 }, | |
1116 | /* 0x7c */ { NULL, NULL, 0 }, | |
1117 | /* 0x7d */ { NULL, NULL, 0 }, | |
1118 | /* 0x7e */ { NULL, NULL, 0 }, | |
1119 | /* 0x7f */ { NULL, NULL, 0 }, | |
1120 | /* 0x80 */ { "SMBdskattr",reply_dskattr,AS_USER}, | |
1121 | /* 0x81 */ { "SMBsearch",reply_search,AS_USER}, | |
1122 | /* 0x82 */ { "SMBffirst",reply_search,AS_USER}, | |
1123 | /* 0x83 */ { "SMBfunique",reply_search,AS_USER}, | |
1124 | /* 0x84 */ { "SMBfclose",reply_fclose,AS_USER}, | |
1125 | /* 0x85 */ { NULL, NULL, 0 }, | |
1126 | /* 0x86 */ { NULL, NULL, 0 }, | |
1127 | /* 0x87 */ { NULL, NULL, 0 }, | |
1128 | /* 0x88 */ { NULL, NULL, 0 }, | |
1129 | /* 0x89 */ { NULL, NULL, 0 }, | |
1130 | /* 0x8a */ { NULL, NULL, 0 }, | |
1131 | /* 0x8b */ { NULL, NULL, 0 }, | |
1132 | /* 0x8c */ { NULL, NULL, 0 }, | |
1133 | /* 0x8d */ { NULL, NULL, 0 }, | |
1134 | /* 0x8e */ { NULL, NULL, 0 }, | |
1135 | /* 0x8f */ { NULL, NULL, 0 }, | |
1136 | /* 0x90 */ { NULL, NULL, 0 }, | |
1137 | /* 0x91 */ { NULL, NULL, 0 }, | |
1138 | /* 0x92 */ { NULL, NULL, 0 }, | |
1139 | /* 0x93 */ { NULL, NULL, 0 }, | |
1140 | /* 0x94 */ { NULL, NULL, 0 }, | |
1141 | /* 0x95 */ { NULL, NULL, 0 }, | |
1142 | /* 0x96 */ { NULL, NULL, 0 }, | |
1143 | /* 0x97 */ { NULL, NULL, 0 }, | |
1144 | /* 0x98 */ { NULL, NULL, 0 }, | |
1145 | /* 0x99 */ { NULL, NULL, 0 }, | |
1146 | /* 0x9a */ { NULL, NULL, 0 }, | |
1147 | /* 0x9b */ { NULL, NULL, 0 }, | |
1148 | /* 0x9c */ { NULL, NULL, 0 }, | |
1149 | /* 0x9d */ { NULL, NULL, 0 }, | |
1150 | /* 0x9e */ { NULL, NULL, 0 }, | |
1151 | /* 0x9f */ { NULL, NULL, 0 }, | |
1152 | /* 0xa0 */ { "SMBnttrans",reply_nttrans, AS_USER | CAN_IPC }, | |
1153 | /* 0xa1 */ { "SMBnttranss",reply_nttranss, AS_USER | CAN_IPC }, | |
1154 | /* 0xa2 */ { "SMBntcreateX",reply_ntcreate_and_X, AS_USER | CAN_IPC }, | |
1155 | /* 0xa3 */ { NULL, NULL, 0 }, | |
1156 | /* 0xa4 */ { "SMBntcancel",reply_ntcancel, 0 }, | |
1157 | /* 0xa5 */ { "SMBntrename",reply_ntrename, AS_USER | NEED_WRITE }, | |
1158 | /* 0xa6 */ { NULL, NULL, 0 }, | |
1159 | /* 0xa7 */ { NULL, NULL, 0 }, | |
1160 | /* 0xa8 */ { NULL, NULL, 0 }, | |
1161 | /* 0xa9 */ { NULL, NULL, 0 }, | |
1162 | /* 0xaa */ { NULL, NULL, 0 }, | |
1163 | /* 0xab */ { NULL, NULL, 0 }, | |
1164 | /* 0xac */ { NULL, NULL, 0 }, | |
1165 | /* 0xad */ { NULL, NULL, 0 }, | |
1166 | /* 0xae */ { NULL, NULL, 0 }, | |
1167 | /* 0xaf */ { NULL, NULL, 0 }, | |
1168 | /* 0xb0 */ { NULL, NULL, 0 }, | |
1169 | /* 0xb1 */ { NULL, NULL, 0 }, | |
1170 | /* 0xb2 */ { NULL, NULL, 0 }, | |
1171 | /* 0xb3 */ { NULL, NULL, 0 }, | |
1172 | /* 0xb4 */ { NULL, NULL, 0 }, | |
1173 | /* 0xb5 */ { NULL, NULL, 0 }, | |
1174 | /* 0xb6 */ { NULL, NULL, 0 }, | |
1175 | /* 0xb7 */ { NULL, NULL, 0 }, | |
1176 | /* 0xb8 */ { NULL, NULL, 0 }, | |
1177 | /* 0xb9 */ { NULL, NULL, 0 }, | |
1178 | /* 0xba */ { NULL, NULL, 0 }, | |
1179 | /* 0xbb */ { NULL, NULL, 0 }, | |
1180 | /* 0xbc */ { NULL, NULL, 0 }, | |
1181 | /* 0xbd */ { NULL, NULL, 0 }, | |
1182 | /* 0xbe */ { NULL, NULL, 0 }, | |
1183 | /* 0xbf */ { NULL, NULL, 0 }, | |
1184 | /* 0xc0 */ { "SMBsplopen",reply_printopen,AS_USER}, | |
1185 | /* 0xc1 */ { "SMBsplwr",reply_printwrite,AS_USER}, | |
1186 | /* 0xc2 */ { "SMBsplclose",reply_printclose,AS_USER}, | |
1187 | /* 0xc3 */ { "SMBsplretq",reply_printqueue,AS_USER}, | |
1188 | /* 0xc4 */ { NULL, NULL, 0 }, | |
1189 | /* 0xc5 */ { NULL, NULL, 0 }, | |
1190 | /* 0xc6 */ { NULL, NULL, 0 }, | |
1191 | /* 0xc7 */ { NULL, NULL, 0 }, | |
1192 | /* 0xc8 */ { NULL, NULL, 0 }, | |
1193 | /* 0xc9 */ { NULL, NULL, 0 }, | |
1194 | /* 0xca */ { NULL, NULL, 0 }, | |
1195 | /* 0xcb */ { NULL, NULL, 0 }, | |
1196 | /* 0xcc */ { NULL, NULL, 0 }, | |
1197 | /* 0xcd */ { NULL, NULL, 0 }, | |
1198 | /* 0xce */ { NULL, NULL, 0 }, | |
1199 | /* 0xcf */ { NULL, NULL, 0 }, | |
1200 | /* 0xd0 */ { "SMBsends",reply_sends,AS_GUEST}, | |
1201 | /* 0xd1 */ { "SMBsendb", NULL,AS_GUEST}, | |
1202 | /* 0xd2 */ { "SMBfwdname", NULL,AS_GUEST}, | |
1203 | /* 0xd3 */ { "SMBcancelf", NULL,AS_GUEST}, | |
1204 | /* 0xd4 */ { "SMBgetmac", NULL,AS_GUEST}, | |
1205 | /* 0xd5 */ { "SMBsendstrt",reply_sendstrt,AS_GUEST}, | |
1206 | /* 0xd6 */ { "SMBsendend",reply_sendend,AS_GUEST}, | |
1207 | /* 0xd7 */ { "SMBsendtxt",reply_sendtxt,AS_GUEST}, | |
1208 | /* 0xd8 */ { NULL, NULL, 0 }, | |
1209 | /* 0xd9 */ { NULL, NULL, 0 }, | |
1210 | /* 0xda */ { NULL, NULL, 0 }, | |
1211 | /* 0xdb */ { NULL, NULL, 0 }, | |
1212 | /* 0xdc */ { NULL, NULL, 0 }, | |
1213 | /* 0xdd */ { NULL, NULL, 0 }, | |
1214 | /* 0xde */ { NULL, NULL, 0 }, | |
1215 | /* 0xdf */ { NULL, NULL, 0 }, | |
1216 | /* 0xe0 */ { NULL, NULL, 0 }, | |
1217 | /* 0xe1 */ { NULL, NULL, 0 }, | |
1218 | /* 0xe2 */ { NULL, NULL, 0 }, | |
1219 | /* 0xe3 */ { NULL, NULL, 0 }, | |
1220 | /* 0xe4 */ { NULL, NULL, 0 }, | |
1221 | /* 0xe5 */ { NULL, NULL, 0 }, | |
1222 | /* 0xe6 */ { NULL, NULL, 0 }, | |
1223 | /* 0xe7 */ { NULL, NULL, 0 }, | |
1224 | /* 0xe8 */ { NULL, NULL, 0 }, | |
1225 | /* 0xe9 */ { NULL, NULL, 0 }, | |
1226 | /* 0xea */ { NULL, NULL, 0 }, | |
1227 | /* 0xeb */ { NULL, NULL, 0 }, | |
1228 | /* 0xec */ { NULL, NULL, 0 }, | |
1229 | /* 0xed */ { NULL, NULL, 0 }, | |
1230 | /* 0xee */ { NULL, NULL, 0 }, | |
1231 | /* 0xef */ { NULL, NULL, 0 }, | |
1232 | /* 0xf0 */ { NULL, NULL, 0 }, | |
1233 | /* 0xf1 */ { NULL, NULL, 0 }, | |
1234 | /* 0xf2 */ { NULL, NULL, 0 }, | |
1235 | /* 0xf3 */ { NULL, NULL, 0 }, | |
1236 | /* 0xf4 */ { NULL, NULL, 0 }, | |
1237 | /* 0xf5 */ { NULL, NULL, 0 }, | |
1238 | /* 0xf6 */ { NULL, NULL, 0 }, | |
1239 | /* 0xf7 */ { NULL, NULL, 0 }, | |
1240 | /* 0xf8 */ { NULL, NULL, 0 }, | |
1241 | /* 0xf9 */ { NULL, NULL, 0 }, | |
1242 | /* 0xfa */ { NULL, NULL, 0 }, | |
1243 | /* 0xfb */ { NULL, NULL, 0 }, | |
1244 | /* 0xfc */ { NULL, NULL, 0 }, | |
1245 | /* 0xfd */ { NULL, NULL, 0 }, | |
1246 | /* 0xfe */ { NULL, NULL, 0 }, | |
1247 | /* 0xff */ { NULL, NULL, 0 } | |
918c3ebe JA |
1248 | |
1249 | }; | |
c3effa8b | 1250 | |
cc6a4101 VL |
1251 | /******************************************************************* |
1252 | allocate and initialize a reply packet | |
1253 | ********************************************************************/ | |
1254 | ||
ae0c6cff VL |
1255 | static bool create_outbuf(TALLOC_CTX *mem_ctx, struct smb_request *req, |
1256 | const char *inbuf, char **outbuf, uint8_t num_words, | |
1257 | uint32_t num_bytes) | |
cc6a4101 | 1258 | { |
2fb27fcb VL |
1259 | /* |
1260 | * Protect against integer wrap | |
1261 | */ | |
1262 | if ((num_bytes > 0xffffff) | |
1263 | || ((num_bytes + smb_size + num_words*2) > 0xffffff)) { | |
1264 | char *msg; | |
a4c0812a VL |
1265 | if (asprintf(&msg, "num_bytes too large: %u", |
1266 | (unsigned)num_bytes) == -1) { | |
4f41be35 | 1267 | msg = discard_const_p(char, "num_bytes too large"); |
a4c0812a | 1268 | } |
2fb27fcb VL |
1269 | smb_panic(msg); |
1270 | } | |
1271 | ||
3d151376 | 1272 | *outbuf = talloc_array(mem_ctx, char, |
5cd8a427 VL |
1273 | smb_size + num_words*2 + num_bytes); |
1274 | if (*outbuf == NULL) { | |
1275 | return false; | |
cc6a4101 VL |
1276 | } |
1277 | ||
ae0c6cff | 1278 | construct_reply_common(req, inbuf, *outbuf); |
5cd8a427 | 1279 | srv_set_message(*outbuf, num_words, num_bytes, false); |
cc6a4101 VL |
1280 | /* |
1281 | * Zero out the word area, the caller has to take care of the bcc area | |
1282 | * himself | |
1283 | */ | |
1284 | if (num_words != 0) { | |
5cd8a427 | 1285 | memset(*outbuf + smb_vwv0, 0, num_words*2); |
cc6a4101 VL |
1286 | } |
1287 | ||
5cd8a427 VL |
1288 | return true; |
1289 | } | |
1290 | ||
1291 | void reply_outbuf(struct smb_request *req, uint8 num_words, uint32 num_bytes) | |
1292 | { | |
1293 | char *outbuf; | |
4f41be35 | 1294 | if (!create_outbuf(req, req, (const char *)req->inbuf, &outbuf, num_words, |
5cd8a427 VL |
1295 | num_bytes)) { |
1296 | smb_panic("could not allocate output buffer\n"); | |
1297 | } | |
1298 | req->outbuf = (uint8_t *)outbuf; | |
cc6a4101 VL |
1299 | } |
1300 | ||
1301 | ||
712a30ed | 1302 | /******************************************************************* |
a834a73e GC |
1303 | Dump a packet to a file. |
1304 | ********************************************************************/ | |
1305 | ||
cc6a4101 | 1306 | static void smb_dump(const char *name, int type, const char *data, ssize_t len) |
712a30ed LL |
1307 | { |
1308 | int fd, i; | |
d068bc64 JA |
1309 | char *fname = NULL; |
1310 | if (DEBUGLEVEL < 50) { | |
1311 | return; | |
1312 | } | |
712a30ed | 1313 | |
62707533 | 1314 | if (len < 4) len = smb_len(data)+4; |
712a30ed | 1315 | for (i=1;i<100;i++) { |
a4c0812a VL |
1316 | if (asprintf(&fname, "/tmp/%s.%d.%s", name, i, |
1317 | type ? "req" : "resp") == -1) { | |
d068bc64 JA |
1318 | return; |
1319 | } | |
712a30ed LL |
1320 | fd = open(fname, O_WRONLY|O_CREAT|O_EXCL, 0644); |
1321 | if (fd != -1 || errno != EEXIST) break; | |
1322 | } | |
1323 | if (fd != -1) { | |
e400bfce JA |
1324 | ssize_t ret = write(fd, data, len); |
1325 | if (ret != len) | |
1326 | DEBUG(0,("smb_dump: problem: write returned %d\n", (int)ret )); | |
712a30ed | 1327 | close(fd); |
9c8d23e5 | 1328 | DEBUG(0,("created %s len %lu\n", fname, (unsigned long)len)); |
712a30ed | 1329 | } |
d068bc64 | 1330 | SAFE_FREE(fname); |
712a30ed LL |
1331 | } |
1332 | ||
c3effa8b | 1333 | /**************************************************************************** |
cc6a4101 VL |
1334 | Prepare everything for calling the actual request function, and potentially |
1335 | call the request function via the "new" interface. | |
1336 | ||
1337 | Return False if the "legacy" function needs to be called, everything is | |
1338 | prepared. | |
1339 | ||
1340 | Return True if we're done. | |
1341 | ||
1342 | I know this API sucks, but it is the one with the least code change I could | |
1343 | find. | |
c3effa8b | 1344 | ****************************************************************************/ |
a834a73e | 1345 | |
9254bb4e | 1346 | static connection_struct *switch_message(uint8 type, struct smb_request *req, int size) |
c3effa8b | 1347 | { |
941db29a | 1348 | int flags; |
941db29a | 1349 | uint16 session_tag; |
9254bb4e | 1350 | connection_struct *conn = NULL; |
6b8db9b2 | 1351 | struct smbd_server_connection *sconn = req->sconn; |
a513086c | 1352 | char *raddr; |
24f8e973 | 1353 | |
a834a73e | 1354 | errno = 0; |
0557c6cb | 1355 | |
48d3a1d2 | 1356 | if (smb_messages[type].fn == NULL) { |
a834a73e | 1357 | DEBUG(0,("Unknown message type %d!\n",type)); |
4f41be35 | 1358 | smb_dump("Unknown", 1, (const char *)req->inbuf, size); |
cc6a4101 | 1359 | reply_unknown_new(req, type); |
9254bb4e | 1360 | return NULL; |
941db29a | 1361 | } |
a834a73e | 1362 | |
941db29a | 1363 | flags = smb_messages[type].flags; |
a834a73e | 1364 | |
941db29a VL |
1365 | /* In share mode security we must ignore the vuid. */ |
1366 | session_tag = (lp_security() == SEC_SHARE) | |
cc6a4101 | 1367 | ? UID_FIELD_INVALID : req->vuid; |
9254bb4e | 1368 | conn = req->conn; |
918c3ebe | 1369 | |
8579dd4d VL |
1370 | DEBUG(3,("switch message %s (pid %d) conn 0x%lx\n", smb_fn_name(type), |
1371 | (int)sys_getpid(), (unsigned long)conn)); | |
941db29a | 1372 | |
4f41be35 | 1373 | smb_dump(smb_fn_name(type), 1, (const char *)req->inbuf, size); |
918c3ebe | 1374 | |
941db29a | 1375 | /* Ensure this value is replaced in the incoming packet. */ |
4f41be35 | 1376 | SSVAL(discard_const_p(uint8_t, req->inbuf),smb_uid,session_tag); |
918c3ebe | 1377 | |
941db29a VL |
1378 | /* |
1379 | * Ensure the correct username is in current_user_info. This is a | |
1380 | * really ugly bugfix for problems with multiple session_setup_and_X's | |
1381 | * being done and allowing %U and %G substitutions to work correctly. | |
1382 | * There is a reason this code is done here, don't move it unless you | |
8579dd4d VL |
1383 | * know what you're doing... :-). |
1384 | * JRA. | |
941db29a VL |
1385 | */ |
1386 | ||
356f0336 | 1387 | if (session_tag != sconn->smb1.sessions.last_session_tag) { |
941db29a VL |
1388 | user_struct *vuser = NULL; |
1389 | ||
356f0336 | 1390 | sconn->smb1.sessions.last_session_tag = session_tag; |
941db29a | 1391 | if(session_tag != UID_FIELD_INVALID) { |
75d03970 | 1392 | vuser = get_valid_user_struct(sconn, session_tag); |
941db29a | 1393 | if (vuser) { |
bec1dfab | 1394 | set_current_user_info( |
92895379 AB |
1395 | vuser->session_info->unix_info->sanitized_username, |
1396 | vuser->session_info->unix_info->unix_name, | |
128ae06a | 1397 | vuser->session_info->info->domain_name); |
a59149b8 JA |
1398 | } |
1399 | } | |
941db29a | 1400 | } |
d57e67f9 | 1401 | |
941db29a VL |
1402 | /* Does this call need to be run as the connected user? */ |
1403 | if (flags & AS_USER) { | |
fcda2645 | 1404 | |
941db29a VL |
1405 | /* Does this call need a valid tree connection? */ |
1406 | if (!conn) { | |
8579dd4d VL |
1407 | /* |
1408 | * Amazingly, the error code depends on the command | |
1409 | * (from Samba4). | |
1410 | */ | |
941db29a | 1411 | if (type == SMBntcreateX) { |
cc6a4101 | 1412 | reply_nterror(req, NT_STATUS_INVALID_HANDLE); |
941db29a | 1413 | } else { |
642101ac | 1414 | reply_nterror(req, NT_STATUS_NETWORK_NAME_DELETED); |
ce61fb21 | 1415 | } |
9254bb4e | 1416 | return NULL; |
941db29a | 1417 | } |
d57e67f9 | 1418 | |
941db29a | 1419 | if (!change_to_user(conn,session_tag)) { |
5e9aade5 | 1420 | DEBUG(0, ("Error: Could not change to user. Removing " |
79842437 JA |
1421 | "deferred open, mid=%llu.\n", |
1422 | (unsigned long long)req->mid)); | |
74deee3c | 1423 | reply_force_doserror(req, ERRSRV, ERRbaduid); |
9254bb4e | 1424 | return conn; |
941db29a | 1425 | } |
c3effa8b | 1426 | |
941db29a | 1427 | /* All NEED_WRITE and CAN_IPC flags must also have AS_USER. */ |
918c3ebe | 1428 | |
941db29a VL |
1429 | /* Does it need write permission? */ |
1430 | if ((flags & NEED_WRITE) && !CAN_WRITE(conn)) { | |
cc6a4101 | 1431 | reply_nterror(req, NT_STATUS_MEDIA_WRITE_PROTECTED); |
9254bb4e | 1432 | return conn; |
ce61fb21 | 1433 | } |
918c3ebe | 1434 | |
941db29a VL |
1435 | /* IPC services are limited */ |
1436 | if (IS_IPC(conn) && !(flags & CAN_IPC)) { | |
642101ac | 1437 | reply_nterror(req, NT_STATUS_ACCESS_DENIED); |
9254bb4e | 1438 | return conn; |
f60ad8de | 1439 | } |
941db29a VL |
1440 | } else { |
1441 | /* This call needs to be run as root */ | |
1442 | change_to_root_user(); | |
1443 | } | |
918c3ebe | 1444 | |
941db29a VL |
1445 | /* load service specific parameters */ |
1446 | if (conn) { | |
9254bb4e JA |
1447 | if (req->encrypted) { |
1448 | conn->encrypted_tid = true; | |
1449 | /* encrypted required from now on. */ | |
1450 | conn->encrypt_level = Required; | |
1451 | } else if (ENCRYPTION_REQUIRED(conn)) { | |
7808a259 | 1452 | if (req->cmd != SMBtrans2 && req->cmd != SMBtranss2) { |
9254bb4e JA |
1453 | exit_server_cleanly("encryption required " |
1454 | "on connection"); | |
1455 | return conn; | |
1456 | } | |
1457 | } | |
1458 | ||
cc6a4101 | 1459 | if (!set_current_service(conn,SVAL(req->inbuf,smb_flg), |
8579dd4d VL |
1460 | (flags & (AS_USER|DO_CHDIR) |
1461 | ?True:False))) { | |
642101ac | 1462 | reply_nterror(req, NT_STATUS_ACCESS_DENIED); |
9254bb4e | 1463 | return conn; |
afce2b24 | 1464 | } |
941db29a VL |
1465 | conn->num_smb_operations++; |
1466 | } | |
918c3ebe | 1467 | |
a513086c AS |
1468 | raddr = tsocket_address_inet_addr_string(sconn->remote_address, |
1469 | talloc_tos()); | |
1470 | if (raddr == NULL) { | |
1471 | reply_nterror(req, NT_STATUS_NO_MEMORY); | |
1472 | return conn; | |
1473 | } | |
1474 | ||
941db29a VL |
1475 | /* does this protocol need to be run as guest? */ |
1476 | if ((flags & AS_GUEST) | |
8579dd4d | 1477 | && (!change_to_guest() || |
70c5bed4 | 1478 | !allow_access(lp_hostsdeny(-1), lp_hostsallow(-1), |
a513086c AS |
1479 | sconn->remote_hostname, |
1480 | raddr))) { | |
642101ac | 1481 | reply_nterror(req, NT_STATUS_ACCESS_DENIED); |
9254bb4e | 1482 | return conn; |
cc6a4101 VL |
1483 | } |
1484 | ||
48d3a1d2 | 1485 | smb_messages[type].fn(req); |
9254bb4e | 1486 | return req->conn; |
e9ea36e4 AT |
1487 | } |
1488 | ||
e9ea36e4 | 1489 | /**************************************************************************** |
a834a73e | 1490 | Construct a reply to the incoming packet. |
e9ea36e4 | 1491 | ****************************************************************************/ |
a834a73e | 1492 | |
c2533f94 VL |
1493 | static void construct_reply(struct smbd_server_connection *sconn, |
1494 | char *inbuf, int size, size_t unread_bytes, | |
c16c90a1 | 1495 | uint32_t seqnum, bool encrypted, |
54c51a66 | 1496 | struct smb_perfcount_data *deferred_pcd) |
e9ea36e4 | 1497 | { |
9254bb4e | 1498 | connection_struct *conn; |
cc6a4101 | 1499 | struct smb_request *req; |
e9ea36e4 | 1500 | |
929e1d99 | 1501 | if (!(req = talloc(talloc_tos(), struct smb_request))) { |
cc6a4101 VL |
1502 | smb_panic("could not allocate smb_request"); |
1503 | } | |
54c51a66 | 1504 | |
c2533f94 VL |
1505 | if (!init_smb_request(req, sconn, (uint8 *)inbuf, unread_bytes, |
1506 | encrypted, seqnum)) { | |
b7898148 VL |
1507 | exit_server_cleanly("Invalid SMB request"); |
1508 | } | |
1509 | ||
b8125663 | 1510 | req->inbuf = (uint8_t *)talloc_move(req, &inbuf); |
e9ea36e4 | 1511 | |
54c51a66 | 1512 | /* we popped this message off the queue - keep original perf data */ |
1513 | if (deferred_pcd) | |
1514 | req->pcd = *deferred_pcd; | |
1515 | else { | |
1516 | SMB_PERFCOUNT_START(&req->pcd); | |
1517 | SMB_PERFCOUNT_SET_OP(&req->pcd, req->cmd); | |
1518 | SMB_PERFCOUNT_SET_MSGLEN_IN(&req->pcd, size); | |
1519 | } | |
1520 | ||
7808a259 | 1521 | conn = switch_message(req->cmd, req, size); |
e9ea36e4 | 1522 | |
c3250149 JA |
1523 | if (req->unread_bytes) { |
1524 | /* writeX failed. drain socket. */ | |
b9d052c7 | 1525 | if (drain_socket(req->sconn->sock, req->unread_bytes) != |
c3250149 JA |
1526 | req->unread_bytes) { |
1527 | smb_panic("failed to drain pending bytes"); | |
1528 | } | |
1529 | req->unread_bytes = 0; | |
1530 | } | |
1531 | ||
5135ebd6 VL |
1532 | if (req->done) { |
1533 | TALLOC_FREE(req); | |
1534 | return; | |
1535 | } | |
1536 | ||
b578db69 VL |
1537 | if (req->outbuf == NULL) { |
1538 | return; | |
cc6a4101 | 1539 | } |
e9ea36e4 | 1540 | |
b578db69 VL |
1541 | if (CVAL(req->outbuf,0) == 0) { |
1542 | show_msg((char *)req->outbuf); | |
1543 | } | |
e9ea36e4 | 1544 | |
1808dd0a | 1545 | if (!srv_send_smb(req->sconn, |
9254bb4e | 1546 | (char *)req->outbuf, |
c16c90a1 | 1547 | true, req->seqnum+1, |
54c51a66 | 1548 | IS_CONN_ENCRYPTED(conn)||req->encrypted, |
1549 | &req->pcd)) { | |
9254bb4e | 1550 | exit_server_cleanly("construct_reply: srv_send_smb failed."); |
dc90cd89 | 1551 | } |
cc6a4101 VL |
1552 | |
1553 | TALLOC_FREE(req); | |
1554 | ||
1555 | return; | |
e9ea36e4 AT |
1556 | } |
1557 | ||
e9ea36e4 | 1558 | /**************************************************************************** |
49ecd176 | 1559 | Process an smb from the client |
e9ea36e4 | 1560 | ****************************************************************************/ |
81bdb591 | 1561 | static void process_smb(struct smbd_server_connection *sconn, |
aeb798c3 | 1562 | uint8_t *inbuf, size_t nread, size_t unread_bytes, |
c16c90a1 SM |
1563 | uint32_t seqnum, bool encrypted, |
1564 | struct smb_perfcount_data *deferred_pcd) | |
e9ea36e4 | 1565 | { |
1eff0523 | 1566 | int msg_type = CVAL(inbuf,0); |
1eff0523 JA |
1567 | |
1568 | DO_PROFILE_INC(smb_count); | |
1569 | ||
cc6a4101 VL |
1570 | DEBUG( 6, ( "got message type 0x%x of len 0x%x\n", msg_type, |
1571 | smb_len(inbuf) ) ); | |
2d81721a | 1572 | DEBUG(3, ("Transaction %d of length %d (%u toread)\n", |
81bdb591 | 1573 | sconn->trans_num, (int)nread, (unsigned int)unread_bytes)); |
1eff0523 | 1574 | |
0633c0f6 | 1575 | if (msg_type != NBSSmessage) { |
cc6a4101 VL |
1576 | /* |
1577 | * NetBIOS session request, keepalive, etc. | |
1578 | */ | |
81bdb591 | 1579 | reply_special(sconn, (char *)inbuf, nread); |
aeb798c3 | 1580 | goto done; |
cc6a4101 | 1581 | } |
1eff0523 | 1582 | |
81bdb591 | 1583 | if (sconn->using_smb2) { |
d28fa8fa JA |
1584 | /* At this point we're not really using smb2, |
1585 | * we make the decision here.. */ | |
688945a9 | 1586 | if (smbd_is_smb2_header(inbuf, nread)) { |
cac60a70 | 1587 | smbd_smb2_first_negprot(sconn, inbuf, nread); |
688945a9 | 1588 | return; |
b4b9918c | 1589 | } else if (nread >= smb_size && valid_smb_header(sconn, inbuf) |
c9a3661c JA |
1590 | && CVAL(inbuf, smb_com) != 0x72) { |
1591 | /* This is a non-negprot SMB1 packet. | |
1592 | Disable SMB2 from now on. */ | |
cac60a70 | 1593 | sconn->using_smb2 = false; |
688945a9 | 1594 | } |
688945a9 SM |
1595 | } |
1596 | ||
fed2fba0 VL |
1597 | /* Make sure this is an SMB packet. smb_size contains NetBIOS header |
1598 | * so subtract 4 from it. */ | |
1599 | if ((nread < (smb_size - 4)) || !valid_smb_header(sconn, inbuf)) { | |
1600 | DEBUG(2,("Non-SMB packet of length %d. Terminating server\n", | |
1601 | smb_len(inbuf))); | |
1602 | ||
1603 | /* special magic for immediate exit */ | |
1604 | if ((nread == 9) && | |
1605 | (IVAL(inbuf, 4) == 0x74697865) && | |
1606 | lp_parm_bool(-1, "smbd", "suicide mode", false)) { | |
1607 | uint8_t exitcode = CVAL(inbuf, 8); | |
1608 | DEBUG(1, ("Exiting immediately with code %d\n", | |
1609 | (int)exitcode)); | |
1610 | exit(exitcode); | |
1611 | } | |
1612 | ||
1613 | exit_server_cleanly("Non-SMB packet"); | |
1614 | } | |
1615 | ||
aeb798c3 | 1616 | show_msg((char *)inbuf); |
cc6a4101 | 1617 | |
c2533f94 VL |
1618 | construct_reply(sconn, (char *)inbuf, nread, unread_bytes, seqnum, |
1619 | encrypted, deferred_pcd); | |
81bdb591 | 1620 | sconn->trans_num++; |
aeb798c3 SM |
1621 | |
1622 | done: | |
8dc70295 | 1623 | sconn->num_requests++; |
aeb798c3 SM |
1624 | |
1625 | /* The timeout_processing function isn't run nearly | |
1626 | often enough to implement 'max log size' without | |
1627 | overrunning the size of the file by many megabytes. | |
1628 | This is especially true if we are running at debug | |
1629 | level 10. Checking every 50 SMBs is a nice | |
1630 | tradeoff of performance vs log file size overrun. */ | |
1631 | ||
8dc70295 | 1632 | if ((sconn->num_requests % 50) == 0 && |
aeb798c3 SM |
1633 | need_to_check_log_size()) { |
1634 | change_to_root_user(); | |
1635 | check_log_size(); | |
1636 | } | |
e9ea36e4 AT |
1637 | } |
1638 | ||
e9ea36e4 | 1639 | /**************************************************************************** |
1eff0523 | 1640 | Return a string containing the function name of a SMB command. |
e9ea36e4 | 1641 | ****************************************************************************/ |
1eff0523 | 1642 | |
127e77e6 | 1643 | const char *smb_fn_name(int type) |
e9ea36e4 | 1644 | { |
634c5431 | 1645 | const char *unknown_name = "SMBunknown"; |
e9ea36e4 | 1646 | |
918c3ebe | 1647 | if (smb_messages[type].name == NULL) |
e9ea36e4 AT |
1648 | return(unknown_name); |
1649 | ||
918c3ebe | 1650 | return(smb_messages[type].name); |
c3effa8b AT |
1651 | } |
1652 | ||
dc76502c | 1653 | /**************************************************************************** |
6bb8f54e | 1654 | Helper functions for contruct_reply. |
dc76502c JA |
1655 | ****************************************************************************/ |
1656 | ||
6219c997 JA |
1657 | void add_to_common_flags2(uint32 v) |
1658 | { | |
1659 | common_flags2 |= v; | |
1660 | } | |
6bb8f54e | 1661 | |
27891bde | 1662 | void remove_from_common_flags2(uint32 v) |
6bb8f54e | 1663 | { |
27891bde | 1664 | common_flags2 &= ~v; |
6bb8f54e JA |
1665 | } |
1666 | ||
ae0c6cff VL |
1667 | static void construct_reply_common(struct smb_request *req, const char *inbuf, |
1668 | char *outbuf) | |
dc76502c | 1669 | { |
f205e4ca SM |
1670 | uint16_t in_flags2 = SVAL(inbuf,smb_flg2); |
1671 | uint16_t out_flags2 = common_flags2; | |
1672 | ||
1673 | out_flags2 |= in_flags2 & FLAGS2_UNICODE_STRINGS; | |
1674 | out_flags2 |= in_flags2 & FLAGS2_SMB_SECURITY_SIGNATURES; | |
1675 | out_flags2 |= in_flags2 & FLAGS2_SMB_SECURITY_SIGNATURES_REQUIRED; | |
1676 | ||
9254bb4e | 1677 | srv_set_message(outbuf,0,0,false); |
8905b599 | 1678 | |
ae0c6cff | 1679 | SCVAL(outbuf, smb_com, req->cmd); |
fc13f284 | 1680 | SIVAL(outbuf,smb_rcls,0); |
b7280423 | 1681 | SCVAL(outbuf,smb_flg, FLAG_REPLY | (CVAL(inbuf,smb_flg) & FLAG_CASELESS_PATHNAMES)); |
f205e4ca | 1682 | SSVAL(outbuf,smb_flg2, out_flags2); |
fc13f284 | 1683 | memset(outbuf+smb_pidhigh,'\0',(smb_tid-smb_pidhigh)); |
f205e4ca | 1684 | memcpy(outbuf+smb_ss_field, inbuf+smb_ss_field, 8); |
b7280423 | 1685 | |
b7280423 AT |
1686 | SSVAL(outbuf,smb_tid,SVAL(inbuf,smb_tid)); |
1687 | SSVAL(outbuf,smb_pid,SVAL(inbuf,smb_pid)); | |
1688 | SSVAL(outbuf,smb_uid,SVAL(inbuf,smb_uid)); | |
1689 | SSVAL(outbuf,smb_mid,SVAL(inbuf,smb_mid)); | |
dc76502c | 1690 | } |
c3effa8b | 1691 | |
e4897a53 VL |
1692 | void construct_reply_common_req(struct smb_request *req, char *outbuf) |
1693 | { | |
4f41be35 | 1694 | construct_reply_common(req, (const char *)req->inbuf, outbuf); |
e4897a53 VL |
1695 | } |
1696 | ||
ddaa65ef VL |
1697 | /* |
1698 | * How many bytes have we already accumulated up to the current wct field | |
1699 | * offset? | |
1700 | */ | |
1701 | ||
1702 | size_t req_wct_ofs(struct smb_request *req) | |
1703 | { | |
1704 | size_t buf_size; | |
1705 | ||
1706 | if (req->chain_outbuf == NULL) { | |
1707 | return smb_wct - 4; | |
1708 | } | |
1709 | buf_size = talloc_get_size(req->chain_outbuf); | |
1710 | if ((buf_size % 4) != 0) { | |
1711 | buf_size += (4 - (buf_size % 4)); | |
1712 | } | |
1713 | return buf_size - 4; | |
1714 | } | |
1715 | ||
ba981128 VL |
1716 | /* |
1717 | * Hack around reply_nterror & friends not being aware of chained requests, | |
1718 | * generating illegal (i.e. wct==0) chain replies. | |
1719 | */ | |
1720 | ||
1721 | static void fixup_chain_error_packet(struct smb_request *req) | |
1722 | { | |
1723 | uint8_t *outbuf = req->outbuf; | |
1724 | req->outbuf = NULL; | |
1725 | reply_outbuf(req, 2, 0); | |
1726 | memcpy(req->outbuf, outbuf, smb_wct); | |
1727 | TALLOC_FREE(outbuf); | |
1728 | SCVAL(req->outbuf, smb_vwv0, 0xff); | |
1729 | } | |
1730 | ||
b6f446ca VL |
1731 | /** |
1732 | * @brief Find the smb_cmd offset of the last command pushed | |
1733 | * @param[in] buf The buffer we're building up | |
1734 | * @retval Where can we put our next andx cmd? | |
1735 | * | |
1736 | * While chaining requests, the "next" request we're looking at needs to put | |
1737 | * its SMB_Command before the data the previous request already built up added | |
1738 | * to the chain. Find the offset to the place where we have to put our cmd. | |
1739 | */ | |
1740 | ||
1741 | static bool find_andx_cmd_ofs(uint8_t *buf, size_t *pofs) | |
1742 | { | |
1743 | uint8_t cmd; | |
1744 | size_t ofs; | |
1745 | ||
1746 | cmd = CVAL(buf, smb_com); | |
1747 | ||
947a8bc4 VL |
1748 | if (!is_andx_req(cmd)) { |
1749 | return false; | |
1750 | } | |
b6f446ca VL |
1751 | |
1752 | ofs = smb_vwv0; | |
1753 | ||
1754 | while (CVAL(buf, ofs) != 0xff) { | |
1755 | ||
1756 | if (!is_andx_req(CVAL(buf, ofs))) { | |
1757 | return false; | |
1758 | } | |
1759 | ||
1760 | /* | |
1761 | * ofs is from start of smb header, so add the 4 length | |
1762 | * bytes. The next cmd is right after the wct field. | |
1763 | */ | |
1764 | ofs = SVAL(buf, ofs+2) + 4 + 1; | |
1765 | ||
947a8bc4 VL |
1766 | if (ofs+4 >= talloc_get_size(buf)) { |
1767 | return false; | |
1768 | } | |
b6f446ca VL |
1769 | } |
1770 | ||
1771 | *pofs = ofs; | |
1772 | return true; | |
1773 | } | |
1774 | ||
1775 | /** | |
1776 | * @brief Do the smb chaining at a buffer level | |
1777 | * @param[in] poutbuf Pointer to the talloc'ed buffer to be modified | |
da322e4f | 1778 | * @param[in] andx_buf Buffer to be appended |
b6f446ca VL |
1779 | */ |
1780 | ||
da322e4f | 1781 | static bool smb_splice_chain(uint8_t **poutbuf, const uint8_t *andx_buf) |
b6f446ca | 1782 | { |
da322e4f VL |
1783 | uint8_t smb_command = CVAL(andx_buf, smb_com); |
1784 | uint8_t wct = CVAL(andx_buf, smb_wct); | |
1785 | const uint16_t *vwv = (const uint16_t *)(andx_buf + smb_vwv); | |
da322e4f VL |
1786 | uint32_t num_bytes = smb_buflen(andx_buf); |
1787 | const uint8_t *bytes = (const uint8_t *)smb_buf(andx_buf); | |
1788 | ||
b6f446ca VL |
1789 | uint8_t *outbuf; |
1790 | size_t old_size, new_size; | |
1791 | size_t ofs; | |
1792 | size_t chain_padding = 0; | |
b6f446ca VL |
1793 | bool first_request; |
1794 | ||
1795 | old_size = talloc_get_size(*poutbuf); | |
1796 | ||
1797 | /* | |
1798 | * old_size == smb_wct means we're pushing the first request in for | |
1799 | * libsmb/ | |
1800 | */ | |
1801 | ||
1802 | first_request = (old_size == smb_wct); | |
1803 | ||
1804 | if (!first_request && ((old_size % 4) != 0)) { | |
1805 | /* | |
1806 | * Align the wct field of subsequent requests to a 4-byte | |
1807 | * boundary | |
1808 | */ | |
1809 | chain_padding = 4 - (old_size % 4); | |
1810 | } | |
1811 | ||
1812 | /* | |
1813 | * After the old request comes the new wct field (1 byte), the vwv's | |
5b7609db | 1814 | * and the num_bytes field. |
b6f446ca VL |
1815 | */ |
1816 | ||
1817 | new_size = old_size + chain_padding + 1 + wct * sizeof(uint16_t) + 2; | |
4708b97c | 1818 | new_size += num_bytes; |
b6f446ca VL |
1819 | |
1820 | if ((smb_command != SMBwriteX) && (new_size > 0xffff)) { | |
28901acd | 1821 | DEBUG(1, ("smb_splice_chain: %u bytes won't fit\n", |
b6f446ca VL |
1822 | (unsigned)new_size)); |
1823 | return false; | |
1824 | } | |
1825 | ||
73b37743 | 1826 | outbuf = talloc_realloc(NULL, *poutbuf, uint8_t, new_size); |
b6f446ca VL |
1827 | if (outbuf == NULL) { |
1828 | DEBUG(0, ("talloc failed\n")); | |
1829 | return false; | |
1830 | } | |
1831 | *poutbuf = outbuf; | |
1832 | ||
1833 | if (first_request) { | |
1834 | SCVAL(outbuf, smb_com, smb_command); | |
1835 | } else { | |
1836 | size_t andx_cmd_ofs; | |
1837 | ||
1838 | if (!find_andx_cmd_ofs(outbuf, &andx_cmd_ofs)) { | |
1839 | DEBUG(1, ("invalid command chain\n")); | |
73b37743 | 1840 | *poutbuf = talloc_realloc( |
b6f446ca VL |
1841 | NULL, *poutbuf, uint8_t, old_size); |
1842 | return false; | |
1843 | } | |
1844 | ||
1845 | if (chain_padding != 0) { | |
1846 | memset(outbuf + old_size, 0, chain_padding); | |
1847 | old_size += chain_padding; | |
1848 | } | |
1849 | ||
1850 | SCVAL(outbuf, andx_cmd_ofs, smb_command); | |
1851 | SSVAL(outbuf, andx_cmd_ofs + 2, old_size - 4); | |
1852 | } | |
1853 | ||
1854 | ofs = old_size; | |
1855 | ||
1856 | /* | |
1857 | * Push the chained request: | |
1858 | * | |
1859 | * wct field | |
1860 | */ | |
1861 | ||
1862 | SCVAL(outbuf, ofs, wct); | |
1863 | ofs += 1; | |
1864 | ||
1865 | /* | |
1866 | * vwv array | |
1867 | */ | |
1868 | ||
1869 | memcpy(outbuf + ofs, vwv, sizeof(uint16_t) * wct); | |
1870 | ofs += sizeof(uint16_t) * wct; | |
1871 | ||
1872 | /* | |
1873 | * bcc (byte count) | |
1874 | */ | |
1875 | ||
4708b97c | 1876 | SSVAL(outbuf, ofs, num_bytes); |
b6f446ca VL |
1877 | ofs += sizeof(uint16_t); |
1878 | ||
b6f446ca VL |
1879 | /* |
1880 | * The bytes field | |
1881 | */ | |
1882 | ||
1883 | memcpy(outbuf + ofs, bytes, num_bytes); | |
1884 | ||
1885 | return true; | |
1886 | } | |
1887 | ||
0d7ca8e8 VL |
1888 | /**************************************************************************** |
1889 | Construct a chained reply and add it to the already made reply | |
1890 | ****************************************************************************/ | |
1891 | ||
ba981128 VL |
1892 | void chain_reply(struct smb_request *req) |
1893 | { | |
1894 | size_t smblen = smb_len(req->inbuf); | |
1895 | size_t already_used, length_needed; | |
1896 | uint8_t chain_cmd; | |
1897 | uint32_t chain_offset; /* uint32_t to avoid overflow */ | |
1898 | ||
1899 | uint8_t wct; | |
4f41be35 | 1900 | const uint16_t *vwv; |
ba981128 | 1901 | uint16_t buflen; |
4f41be35 | 1902 | const uint8_t *buf; |
ba981128 VL |
1903 | |
1904 | if (IVAL(req->outbuf, smb_rcls) != 0) { | |
1905 | fixup_chain_error_packet(req); | |
1906 | } | |
1907 | ||
1908 | /* | |
1909 | * Any of the AndX requests and replies have at least a wct of | |
1910 | * 2. vwv[0] is the next command, vwv[1] is the offset from the | |
1911 | * beginning of the SMB header to the next wct field. | |
1912 | * | |
1913 | * None of the AndX requests put anything valuable in vwv[0] and [1], | |
1914 | * so we can overwrite it here to form the chain. | |
1915 | */ | |
1916 | ||
1917 | if ((req->wct < 2) || (CVAL(req->outbuf, smb_wct) < 2)) { | |
25452a22 | 1918 | if (req->chain_outbuf == NULL) { |
73b37743 | 1919 | req->chain_outbuf = talloc_realloc( |
25452a22 VL |
1920 | req, req->outbuf, uint8_t, |
1921 | smb_len(req->outbuf) + 4); | |
1922 | if (req->chain_outbuf == NULL) { | |
1923 | smb_panic("talloc failed"); | |
1924 | } | |
1925 | } | |
1926 | req->outbuf = NULL; | |
ba981128 VL |
1927 | goto error; |
1928 | } | |
1929 | ||
1930 | /* | |
1931 | * Here we assume that this is the end of the chain. For that we need | |
1932 | * to set "next command" to 0xff and the offset to 0. If we later find | |
1933 | * more commands in the chain, this will be overwritten again. | |
1934 | */ | |
1935 | ||
1936 | SCVAL(req->outbuf, smb_vwv0, 0xff); | |
1937 | SCVAL(req->outbuf, smb_vwv0+1, 0); | |
1938 | SSVAL(req->outbuf, smb_vwv1, 0); | |
1939 | ||
1940 | if (req->chain_outbuf == NULL) { | |
1941 | /* | |
1942 | * In req->chain_outbuf we collect all the replies. Start the | |
1943 | * chain by copying in the first reply. | |
c0fea1f0 VL |
1944 | * |
1945 | * We do the realloc because later on we depend on | |
1946 | * talloc_get_size to determine the length of | |
1947 | * chain_outbuf. The reply_xxx routines might have | |
1948 | * over-allocated (reply_pipe_read_and_X used to be such an | |
1949 | * example). | |
ba981128 | 1950 | */ |
73b37743 | 1951 | req->chain_outbuf = talloc_realloc( |
c0fea1f0 VL |
1952 | req, req->outbuf, uint8_t, smb_len(req->outbuf) + 4); |
1953 | if (req->chain_outbuf == NULL) { | |
25452a22 | 1954 | smb_panic("talloc failed"); |
c0fea1f0 | 1955 | } |
ba981128 VL |
1956 | req->outbuf = NULL; |
1957 | } else { | |
6c935f95 TP |
1958 | /* |
1959 | * Update smb headers where subsequent chained commands | |
1960 | * may have updated them. | |
1961 | */ | |
109cbe37 VL |
1962 | SSVAL(req->chain_outbuf, smb_tid, SVAL(req->outbuf, smb_tid)); |
1963 | SSVAL(req->chain_outbuf, smb_uid, SVAL(req->outbuf, smb_uid)); | |
6c935f95 | 1964 | |
da322e4f | 1965 | if (!smb_splice_chain(&req->chain_outbuf, req->outbuf)) { |
ba981128 VL |
1966 | goto error; |
1967 | } | |
1968 | TALLOC_FREE(req->outbuf); | |
1969 | } | |
1970 | ||
1971 | /* | |
1972 | * We use the old request's vwv field to grab the next chained command | |
1973 | * and offset into the chained fields. | |
1974 | */ | |
1975 | ||
1976 | chain_cmd = CVAL(req->vwv+0, 0); | |
1977 | chain_offset = SVAL(req->vwv+1, 0); | |
1978 | ||
1979 | if (chain_cmd == 0xff) { | |
1980 | /* | |
1981 | * End of chain, no more requests from the client. So ship the | |
1982 | * replies. | |
1983 | */ | |
1984 | smb_setlen((char *)(req->chain_outbuf), | |
1985 | talloc_get_size(req->chain_outbuf) - 4); | |
54c51a66 | 1986 | |
1808dd0a | 1987 | if (!srv_send_smb(req->sconn, (char *)req->chain_outbuf, |
c16c90a1 | 1988 | true, req->seqnum+1, |
ba981128 | 1989 | IS_CONN_ENCRYPTED(req->conn) |
54c51a66 | 1990 | ||req->encrypted, |
1991 | &req->pcd)) { | |
ba981128 VL |
1992 | exit_server_cleanly("chain_reply: srv_send_smb " |
1993 | "failed."); | |
1994 | } | |
5135ebd6 VL |
1995 | TALLOC_FREE(req->chain_outbuf); |
1996 | req->done = true; | |
ba981128 VL |
1997 | return; |
1998 | } | |
1999 | ||
54c51a66 | 2000 | /* add a new perfcounter for this element of chain */ |
2001 | SMB_PERFCOUNT_ADD(&req->pcd); | |
2002 | SMB_PERFCOUNT_SET_OP(&req->pcd, chain_cmd); | |
2003 | SMB_PERFCOUNT_SET_MSGLEN_IN(&req->pcd, smblen); | |
2004 | ||
ba981128 | 2005 | /* |
1022c28e VL |
2006 | * Check if the client tries to fool us. The chain offset |
2007 | * needs to point beyond the current request in the chain, it | |
2008 | * needs to strictly grow. Otherwise we might be tricked into | |
2009 | * an endless loop always processing the same request over and | |
2010 | * over again. We used to assume that vwv and the byte buffer | |
2011 | * array in a chain are always attached, but OS/2 the | |
2012 | * Write&X/Read&X chain puts the Read&X vwv array right behind | |
2013 | * the Write&X vwv chain. The Write&X bcc array is put behind | |
2014 | * the Read&X vwv array. So now we check whether the chain | |
2015 | * offset points strictly behind the previous vwv | |
2016 | * array. req->buf points right after the vwv array of the | |
2017 | * previous request. See | |
2018 | * https://bugzilla.samba.org/show_bug.cgi?id=8360 for more | |
2019 | * information. | |
ba981128 VL |
2020 | */ |
2021 | ||
1022c28e VL |
2022 | already_used = PTR_DIFF(req->buf, smb_base(req->inbuf)); |
2023 | if (chain_offset <= already_used) { | |
ba981128 VL |
2024 | goto error; |
2025 | } | |
2026 | ||
2027 | /* | |
2028 | * Next check: Make sure the chain offset does not point beyond the | |
2029 | * overall smb request length. | |
2030 | */ | |
2031 | ||
2032 | length_needed = chain_offset+1; /* wct */ | |
2033 | if (length_needed > smblen) { | |
2034 | goto error; | |
2035 | } | |
2036 | ||
2037 | /* | |
2038 | * Now comes the pointer magic. Goal here is to set up req->vwv and | |
2039 | * req->buf correctly again to be able to call the subsequent | |
2040 | * switch_message(). The chain offset (the former vwv[1]) points at | |
2041 | * the new wct field. | |
2042 | */ | |
2043 | ||
2044 | wct = CVAL(smb_base(req->inbuf), chain_offset); | |
2045 | ||
2046 | /* | |
2047 | * Next consistency check: Make the new vwv array fits in the overall | |
2048 | * smb request. | |
2049 | */ | |
2050 | ||
2051 | length_needed += (wct+1)*sizeof(uint16_t); /* vwv+buflen */ | |
2052 | if (length_needed > smblen) { | |
2053 | goto error; | |
2054 | } | |
4f41be35 | 2055 | vwv = (const uint16_t *)(smb_base(req->inbuf) + chain_offset + 1); |
ba981128 VL |
2056 | |
2057 | /* | |
2058 | * Now grab the new byte buffer.... | |
2059 | */ | |
2060 | ||
2061 | buflen = SVAL(vwv+wct, 0); | |
2062 | ||
2063 | /* | |
2064 | * .. and check that it fits. | |
2065 | */ | |
2066 | ||
2067 | length_needed += buflen; | |
2068 | if (length_needed > smblen) { | |
2069 | goto error; | |
2070 | } | |
4f41be35 | 2071 | buf = (const uint8_t *)(vwv+wct+1); |
ba981128 VL |
2072 | |
2073 | req->cmd = chain_cmd; | |
2074 | req->wct = wct; | |
4f41be35 | 2075 | req->vwv = discard_const_p(uint16_t, vwv); |
ba981128 VL |
2076 | req->buflen = buflen; |
2077 | req->buf = buf; | |
2078 | ||
2079 | switch_message(chain_cmd, req, smblen); | |
2080 | ||
2081 | if (req->outbuf == NULL) { | |
2082 | /* | |
2083 | * This happens if the chained command has suspended itself or | |
2084 | * if it has called srv_send_smb() itself. | |
2085 | */ | |
2086 | return; | |
2087 | } | |
2088 | ||
2089 | /* | |
2090 | * We end up here if the chained command was not itself chained or | |
2091 | * suspended, but for example a close() command. We now need to splice | |
2092 | * the chained commands' outbuf into the already built up chain_outbuf | |
2093 | * and ship the result. | |
2094 | */ | |
2095 | goto done; | |
2096 | ||
2097 | error: | |
2098 | /* | |
2099 | * We end up here if there's any error in the chain syntax. Report a | |
2100 | * DOS error, just like Windows does. | |
2101 | */ | |
74deee3c | 2102 | reply_force_doserror(req, ERRSRV, ERRerror); |
ba981128 VL |
2103 | fixup_chain_error_packet(req); |
2104 | ||
2105 | done: | |
c116652a VL |
2106 | /* |
2107 | * This scary statement intends to set the | |
2108 | * FLAGS2_32_BIT_ERROR_CODES flg2 field in req->chain_outbuf | |
2109 | * to the value req->outbuf carries | |
2110 | */ | |
2111 | SSVAL(req->chain_outbuf, smb_flg2, | |
2112 | (SVAL(req->chain_outbuf, smb_flg2) & ~FLAGS2_32_BIT_ERROR_CODES) | |
2113 | | (SVAL(req->outbuf, smb_flg2) & FLAGS2_32_BIT_ERROR_CODES)); | |
2114 | ||
2115 | /* | |
2116 | * Transfer the error codes from the subrequest to the main one | |
2117 | */ | |
2118 | SSVAL(req->chain_outbuf, smb_rcls, SVAL(req->outbuf, smb_rcls)); | |
2119 | SSVAL(req->chain_outbuf, smb_err, SVAL(req->outbuf, smb_err)); | |
2120 | ||
da322e4f | 2121 | if (!smb_splice_chain(&req->chain_outbuf, req->outbuf)) { |
ba981128 VL |
2122 | exit_server_cleanly("chain_reply: smb_splice_chain failed\n"); |
2123 | } | |
2124 | TALLOC_FREE(req->outbuf); | |
2125 | ||
2126 | smb_setlen((char *)(req->chain_outbuf), | |
2127 | talloc_get_size(req->chain_outbuf) - 4); | |
2128 | ||
2129 | show_msg((char *)(req->chain_outbuf)); | |
2130 | ||
1808dd0a | 2131 | if (!srv_send_smb(req->sconn, (char *)req->chain_outbuf, |
c16c90a1 | 2132 | true, req->seqnum+1, |
54c51a66 | 2133 | IS_CONN_ENCRYPTED(req->conn)||req->encrypted, |
2134 | &req->pcd)) { | |
ad871b73 | 2135 | exit_server_cleanly("chain_reply: srv_send_smb failed."); |
ba981128 | 2136 | } |
5135ebd6 VL |
2137 | TALLOC_FREE(req->chain_outbuf); |
2138 | req->done = true; | |
ba981128 VL |
2139 | } |
2140 | ||
3db52feb AT |
2141 | /**************************************************************************** |
2142 | Check if services need reloading. | |
2143 | ****************************************************************************/ | |
2144 | ||
70df6fcb | 2145 | static void check_reload(struct smbd_server_connection *sconn, time_t t) |
3db52feb | 2146 | { |
3db52feb | 2147 | |
0b188e77 | 2148 | if (last_smb_conf_reload_time == 0) { |
1eff0523 | 2149 | last_smb_conf_reload_time = t; |
7ebd74e6 SS |
2150 | } |
2151 | ||
ac61f650 | 2152 | if (t >= last_smb_conf_reload_time+SMBD_RELOAD_CHECK) { |
03455519 | 2153 | reload_services(sconn, conn_snum_used, true); |
1eff0523 JA |
2154 | last_smb_conf_reload_time = t; |
2155 | } | |
3db52feb | 2156 | } |
c3effa8b | 2157 | |
cad0c004 VL |
2158 | static bool fd_is_readable(int fd) |
2159 | { | |
0f082de5 | 2160 | int ret, revents; |
cad0c004 | 2161 | |
0f082de5 VL |
2162 | ret = poll_one_fd(fd, POLLIN|POLLHUP, 0, &revents); |
2163 | ||
2164 | return ((ret > 0) && ((revents & (POLLIN|POLLHUP|POLLERR)) != 0)); | |
cad0c004 | 2165 | |
cad0c004 VL |
2166 | } |
2167 | ||
fc79169c VL |
2168 | static void smbd_server_connection_write_handler( |
2169 | struct smbd_server_connection *sconn) | |
aeb798c3 SM |
2170 | { |
2171 | /* TODO: make write nonblocking */ | |
2172 | } | |
2173 | ||
cad0c004 | 2174 | static void smbd_server_connection_read_handler( |
fc79169c | 2175 | struct smbd_server_connection *sconn, int fd) |
aeb798c3 SM |
2176 | { |
2177 | uint8_t *inbuf = NULL; | |
2178 | size_t inbuf_len = 0; | |
2179 | size_t unread_bytes = 0; | |
2180 | bool encrypted = false; | |
2181 | TALLOC_CTX *mem_ctx = talloc_tos(); | |
2182 | NTSTATUS status; | |
c16c90a1 | 2183 | uint32_t seqnum; |
aeb798c3 | 2184 | |
5e0258fc VL |
2185 | bool from_client; |
2186 | ||
2187 | if (lp_async_smb_echo_handler() | |
2188 | && fd_is_readable(sconn->smb1.echo_handler.trusted_fd)) { | |
2189 | /* | |
2190 | * This is the super-ugly hack to prefer the packets | |
2191 | * forwarded by the echo handler over the ones by the | |
2192 | * client directly | |
2193 | */ | |
2194 | fd = sconn->smb1.echo_handler.trusted_fd; | |
2195 | } | |
2196 | ||
2197 | from_client = (sconn->sock == fd); | |
977aa660 | 2198 | |
cad0c004 | 2199 | if (from_client) { |
fc79169c | 2200 | smbd_lock_socket(sconn); |
cad0c004 | 2201 | |
5e0258fc VL |
2202 | if (!fd_is_readable(fd)) { |
2203 | DEBUG(10,("the echo listener was faster\n")); | |
2204 | smbd_unlock_socket(sconn); | |
2205 | return; | |
cad0c004 | 2206 | } |
5e0258fc VL |
2207 | } |
2208 | ||
2209 | /* TODO: make this completely nonblocking */ | |
2210 | status = receive_smb_talloc(mem_ctx, sconn, fd, | |
2211 | (char **)(void *)&inbuf, | |
2212 | 0, /* timeout */ | |
2213 | &unread_bytes, | |
2214 | &encrypted, | |
2215 | &inbuf_len, &seqnum, | |
2216 | false /* trusted channel */); | |
cad0c004 | 2217 | |
5e0258fc | 2218 | if (from_client) { |
fc79169c | 2219 | smbd_unlock_socket(sconn); |
977aa660 SM |
2220 | } |
2221 | ||
aeb798c3 SM |
2222 | if (NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) { |
2223 | goto process; | |
2224 | } | |
2225 | if (NT_STATUS_IS_ERR(status)) { | |
2226 | exit_server_cleanly("failed to receive smb request"); | |
2227 | } | |
2228 | if (!NT_STATUS_IS_OK(status)) { | |
2229 | return; | |
2230 | } | |
2231 | ||
2232 | process: | |
fc79169c | 2233 | process_smb(sconn, inbuf, inbuf_len, unread_bytes, |
c16c90a1 | 2234 | seqnum, encrypted, NULL); |
aeb798c3 SM |
2235 | } |
2236 | ||
2237 | static void smbd_server_connection_handler(struct event_context *ev, | |
2238 | struct fd_event *fde, | |
2239 | uint16_t flags, | |
2240 | void *private_data) | |
2241 | { | |
2242 | struct smbd_server_connection *conn = talloc_get_type(private_data, | |
2243 | struct smbd_server_connection); | |
2244 | ||
2245 | if (flags & EVENT_FD_WRITE) { | |
2246 | smbd_server_connection_write_handler(conn); | |
c7a2e52e VL |
2247 | return; |
2248 | } | |
2249 | if (flags & EVENT_FD_READ) { | |
a2bf46e9 | 2250 | smbd_server_connection_read_handler(conn, conn->sock); |
c7a2e52e | 2251 | return; |
aeb798c3 SM |
2252 | } |
2253 | } | |
2254 | ||
cad0c004 VL |
2255 | static void smbd_server_echo_handler(struct event_context *ev, |
2256 | struct fd_event *fde, | |
2257 | uint16_t flags, | |
2258 | void *private_data) | |
2259 | { | |
2260 | struct smbd_server_connection *conn = talloc_get_type(private_data, | |
2261 | struct smbd_server_connection); | |
2262 | ||
2263 | if (flags & EVENT_FD_WRITE) { | |
2264 | smbd_server_connection_write_handler(conn); | |
c672797a VL |
2265 | return; |
2266 | } | |
2267 | if (flags & EVENT_FD_READ) { | |
cad0c004 VL |
2268 | smbd_server_connection_read_handler( |
2269 | conn, conn->smb1.echo_handler.trusted_fd); | |
c672797a | 2270 | return; |
cad0c004 VL |
2271 | } |
2272 | } | |
27f812f3 | 2273 | |
06fb2585 | 2274 | #ifdef CLUSTER_SUPPORT |
27f812f3 SM |
2275 | /**************************************************************************** |
2276 | received when we should release a specific IP | |
2277 | ****************************************************************************/ | |
2278 | static void release_ip(const char *ip, void *priv) | |
2279 | { | |
467208e9 VL |
2280 | const char *addr = (const char *)priv; |
2281 | const char *p = addr; | |
e86a534f MA |
2282 | |
2283 | if (strncmp("::ffff:", addr, 7) == 0) { | |
2284 | p = addr + 7; | |
2285 | } | |
2286 | ||
642c6ba2 CA |
2287 | DEBUG(10, ("Got release IP message for %s, " |
2288 | "our address is %s\n", ip, p)); | |
2289 | ||
7d6e4c7e | 2290 | if ((strcmp(p, ip) == 0) || ((p != addr) && strcmp(addr, ip) == 0)) { |
27f812f3 SM |
2291 | /* we can't afford to do a clean exit - that involves |
2292 | database writes, which would potentially mean we | |
2293 | are still running after the failover has finished - | |
2294 | we have to get rid of this process ID straight | |
2295 | away */ | |
2296 | DEBUG(0,("Got release IP message for our IP %s - exiting immediately\n", | |
2297 | ip)); | |
2298 | /* note we must exit with non-zero status so the unclean handler gets | |
2299 | called in the parent, so that the brl database is tickled */ | |
2300 | _exit(1); | |
2301 | } | |
2302 | } | |
2303 | ||
f83e7d8f | 2304 | static int client_get_tcp_info(int sock, struct sockaddr_storage *server, |
27f812f3 SM |
2305 | struct sockaddr_storage *client) |
2306 | { | |
2307 | socklen_t length; | |
27f812f3 | 2308 | length = sizeof(*server); |
f83e7d8f | 2309 | if (getsockname(sock, (struct sockaddr *)server, &length) != 0) { |
27f812f3 SM |
2310 | return -1; |
2311 | } | |
2312 | length = sizeof(*client); | |
f83e7d8f | 2313 | if (getpeername(sock, (struct sockaddr *)client, &length) != 0) { |
27f812f3 SM |
2314 | return -1; |
2315 | } | |
2316 | return 0; | |
2317 | } | |
2318 | #endif | |
2319 | ||
2320 | /* | |
2321 | * Send keepalive packets to our client | |
2322 | */ | |
2323 | static bool keepalive_fn(const struct timeval *now, void *private_data) | |
2324 | { | |
d911bd5c VL |
2325 | struct smbd_server_connection *sconn = talloc_get_type_abort( |
2326 | private_data, struct smbd_server_connection); | |
c1653e3b SM |
2327 | bool ret; |
2328 | ||
d28fa8fa | 2329 | if (sconn->using_smb2) { |
efd0c35a JA |
2330 | /* Don't do keepalives on an SMB2 connection. */ |
2331 | return false; | |
2332 | } | |
2333 | ||
bf35606b | 2334 | smbd_lock_socket(sconn); |
bb867df2 | 2335 | ret = send_keepalive(sconn->sock); |
bf35606b | 2336 | smbd_unlock_socket(sconn); |
c1653e3b SM |
2337 | |
2338 | if (!ret) { | |
40ae8b74 VL |
2339 | char addr[INET6_ADDRSTRLEN]; |
2340 | /* | |
2341 | * Try and give an error message saying what | |
2342 | * client failed. | |
2343 | */ | |
2344 | DEBUG(0, ("send_keepalive failed for client %s. " | |
2345 | "Error %s - exiting\n", | |
2346 | get_peer_addr(sconn->sock, addr, sizeof(addr)), | |
2347 | strerror(errno))); | |
27f812f3 SM |
2348 | return False; |
2349 | } | |
2350 | return True; | |
2351 | } | |
2352 | ||
2353 | /* | |
2354 | * Do the recurring check if we're idle | |
2355 | */ | |
2356 | static bool deadtime_fn(const struct timeval *now, void *private_data) | |
2357 | { | |
72fd7fb4 VL |
2358 | struct smbd_server_connection *sconn = |
2359 | (struct smbd_server_connection *)private_data; | |
6f30b9a6 | 2360 | |
c8620180 SM |
2361 | if ((conn_num_open(sconn) == 0) |
2362 | || (conn_idle_all(sconn, now->tv_sec))) { | |
e7d0f478 | 2363 | DEBUG( 2, ( "Closing idle connection\n" ) ); |
790ad3d1 VL |
2364 | messaging_send(sconn->msg_ctx, |
2365 | messaging_server_id(sconn->msg_ctx), | |
27f812f3 SM |
2366 | MSG_SHUTDOWN, &data_blob_null); |
2367 | return False; | |
2368 | } | |
2369 | ||
2370 | return True; | |
2371 | } | |
2372 | ||
2373 | /* | |
2374 | * Do the recurring log file and smb.conf reload checks. | |
2375 | */ | |
2376 | ||
2377 | static bool housekeeping_fn(const struct timeval *now, void *private_data) | |
2378 | { | |
babfe237 VL |
2379 | struct smbd_server_connection *sconn = talloc_get_type_abort( |
2380 | private_data, struct smbd_server_connection); | |
0b188e77 DD |
2381 | |
2382 | DEBUG(5, ("housekeeping\n")); | |
2383 | ||
27f812f3 SM |
2384 | change_to_root_user(); |
2385 | ||
2386 | /* update printer queue caches if necessary */ | |
babfe237 | 2387 | update_monitored_printq_cache(sconn->msg_ctx); |
27f812f3 SM |
2388 | |
2389 | /* check if we need to reload services */ | |
0b188e77 | 2390 | check_reload(sconn, time_mono(NULL)); |
27f812f3 SM |
2391 | |
2392 | /* Change machine password if neccessary. */ | |
2393 | attempt_machine_password_change(); | |
2394 | ||
2395 | /* | |
2396 | * Force a log file check. | |
2397 | */ | |
2398 | force_check_log_size(); | |
2399 | check_log_size(); | |
2400 | return true; | |
2401 | } | |
2402 | ||
27afb891 VL |
2403 | /* |
2404 | * Read an smb packet in the echo handler child, giving the parent | |
2405 | * smbd one second to react once the socket becomes readable. | |
2406 | */ | |
2407 | ||
2408 | struct smbd_echo_read_state { | |
2409 | struct tevent_context *ev; | |
2410 | struct smbd_server_connection *sconn; | |
2411 | ||
2412 | char *buf; | |
2413 | size_t buflen; | |
2414 | uint32_t seqnum; | |
2415 | }; | |
2416 | ||
2417 | static void smbd_echo_read_readable(struct tevent_req *subreq); | |
2418 | static void smbd_echo_read_waited(struct tevent_req *subreq); | |
2419 | ||
2420 | static struct tevent_req *smbd_echo_read_send( | |
2421 | TALLOC_CTX *mem_ctx, struct tevent_context *ev, | |
2422 | struct smbd_server_connection *sconn) | |
2423 | { | |
2424 | struct tevent_req *req, *subreq; | |
2425 | struct smbd_echo_read_state *state; | |
2426 | ||
2427 | req = tevent_req_create(mem_ctx, &state, | |
2428 | struct smbd_echo_read_state); | |
2429 | if (req == NULL) { | |
2430 | return NULL; | |
2431 | } | |
2432 | state->ev = ev; | |
2433 | state->sconn = sconn; | |
2434 | ||
2435 | subreq = wait_for_read_send(state, ev, sconn->sock); | |
2436 | if (tevent_req_nomem(subreq, req)) { | |
2437 | return tevent_req_post(req, ev); | |
2438 | } | |
2439 | tevent_req_set_callback(subreq, smbd_echo_read_readable, req); | |
2440 | return req; | |
2441 | } | |
2442 | ||
2443 | static void smbd_echo_read_readable(struct tevent_req *subreq) | |
2444 | { | |
2445 | struct tevent_req *req = tevent_req_callback_data( | |
2446 | subreq, struct tevent_req); | |
2447 | struct smbd_echo_read_state *state = tevent_req_data( | |
2448 | req, struct smbd_echo_read_state); | |
2449 | bool ok; | |
2450 | int err; | |
2451 | ||
2452 | ok = wait_for_read_recv(subreq, &err); | |
2453 | TALLOC_FREE(subreq); | |
2454 | if (!ok) { | |
2455 | tevent_req_nterror(req, map_nt_error_from_unix(err)); | |
2456 | return; | |
2457 | } | |
2458 | ||
2459 | /* | |
2460 | * Give the parent smbd one second to step in | |
2461 | */ | |
2462 | ||
2463 | subreq = tevent_wakeup_send( | |
2464 | state, state->ev, timeval_current_ofs(1, 0)); | |
2465 | if (tevent_req_nomem(subreq, req)) { | |
2466 | return; | |
2467 | } | |
2468 | tevent_req_set_callback(subreq, smbd_echo_read_waited, req); | |
2469 | } | |
2470 | ||
2471 | static void smbd_echo_read_waited(struct tevent_req *subreq) | |
2472 | { | |
2473 | struct tevent_req *req = tevent_req_callback_data( | |
2474 | subreq, struct tevent_req); | |
2475 | struct smbd_echo_read_state *state = tevent_req_data( | |
2476 | req, struct smbd_echo_read_state); | |
2477 | struct smbd_server_connection *sconn = state->sconn; | |
2478 | bool ok; | |
2479 | NTSTATUS status; | |
2480 | size_t unread = 0; | |
2481 | bool encrypted; | |
2482 | ||
2483 | ok = tevent_wakeup_recv(subreq); | |
2484 | TALLOC_FREE(subreq); | |
2485 | if (!ok) { | |
2486 | tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR); | |
2487 | return; | |
2488 | } | |
2489 | ||
2490 | ok = smbd_lock_socket_internal(sconn); | |
2491 | if (!ok) { | |
2492 | tevent_req_nterror(req, map_nt_error_from_unix(errno)); | |
2493 | DEBUG(0, ("%s: failed to lock socket\n", __location__)); | |
2494 | return; | |
2495 | } | |
2496 | ||
2497 | if (!fd_is_readable(sconn->sock)) { | |
2498 | DEBUG(10,("echo_handler[%d] the parent smbd was faster\n", | |
2499 | (int)sys_getpid())); | |
2500 | ||
2501 | ok = smbd_unlock_socket_internal(sconn); | |
2502 | if (!ok) { | |
2503 | tevent_req_nterror(req, map_nt_error_from_unix(errno)); | |
2504 | DEBUG(1, ("%s: failed to unlock socket\n", | |
2505 | __location__)); | |
2506 | return; | |
2507 | } | |
2508 | ||
2509 | subreq = wait_for_read_send(state, state->ev, sconn->sock); | |
2510 | if (tevent_req_nomem(subreq, req)) { | |
2511 | return; | |
2512 | } | |
2513 | tevent_req_set_callback(subreq, smbd_echo_read_readable, req); | |
2514 | return; | |
2515 | } | |
2516 | ||
2517 | status = receive_smb_talloc(state, sconn, sconn->sock, &state->buf, | |
2518 | 0 /* timeout */, | |
2519 | &unread, | |
2520 | &encrypted, | |
2521 | &state->buflen, | |
2522 | &state->seqnum, | |
2523 | false /* trusted_channel*/); | |
2524 | ||
2525 | if (tevent_req_nterror(req, status)) { | |
2526 | tevent_req_nterror(req, status); | |
2527 | DEBUG(1, ("echo_handler[%d]: receive_smb_raw_talloc failed: %s\n", | |
2528 | (int)sys_getpid(), nt_errstr(status))); | |
2529 | return; | |
2530 | } | |
2531 | ||
2532 | ok = smbd_unlock_socket_internal(sconn); | |
2533 | if (!ok) { | |
2534 | tevent_req_nterror(req, map_nt_error_from_unix(errno)); | |
2535 | DEBUG(1, ("%s: failed to unlock socket\n", __location__)); | |
2536 | return; | |
2537 | } | |
2538 | tevent_req_done(req); | |
2539 | } | |
2540 | ||
2541 | static NTSTATUS smbd_echo_read_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx, | |
2542 | char **pbuf, size_t *pbuflen, uint32_t *pseqnum) | |
2543 | { | |
2544 | struct smbd_echo_read_state *state = tevent_req_data( | |
2545 | req, struct smbd_echo_read_state); | |
2546 | NTSTATUS status; | |
2547 | ||
2548 | if (tevent_req_is_nterror(req, &status)) { | |
2549 | return status; | |
2550 | } | |
2551 | *pbuf = talloc_move(mem_ctx, &state->buf); | |
2552 | *pbuflen = state->buflen; | |
2553 | *pseqnum = state->seqnum; | |
2554 | return NT_STATUS_OK; | |
2555 | } | |
2556 | ||
cad0c004 VL |
2557 | struct smbd_echo_state { |
2558 | struct tevent_context *ev; | |
2559 | struct iovec *pending; | |
2560 | struct smbd_server_connection *sconn; | |
2561 | int parent_pipe; | |
2562 | ||
2563 | struct tevent_fd *parent_fde; | |
2564 | ||
cad0c004 VL |
2565 | struct tevent_req *write_req; |
2566 | }; | |
2567 | ||
2568 | static void smbd_echo_writer_done(struct tevent_req *req); | |
2569 | ||
2570 | static void smbd_echo_activate_writer(struct smbd_echo_state *state) | |
2571 | { | |
2572 | int num_pending; | |
2573 | ||
2574 | if (state->write_req != NULL) { | |
2575 | return; | |
2576 | } | |
2577 | ||
2578 | num_pending = talloc_array_length(state->pending); | |
2579 | if (num_pending == 0) { | |
2580 | return; | |
2581 | } | |
2582 | ||
2583 | state->write_req = writev_send(state, state->ev, NULL, | |
2584 | state->parent_pipe, false, | |
2585 | state->pending, num_pending); | |
2586 | if (state->write_req == NULL) { | |
2587 | DEBUG(1, ("writev_send failed\n")); | |
2588 | exit(1); | |
2589 | } | |
2590 | ||
2591 | talloc_steal(state->write_req, state->pending); | |
2592 | state->pending = NULL; | |
2593 | ||
2594 | tevent_req_set_callback(state->write_req, smbd_echo_writer_done, | |
2595 | state); | |
2596 | } | |
2597 | ||
2598 | static void smbd_echo_writer_done(struct tevent_req *req) | |
2599 | { | |
2600 | struct smbd_echo_state *state = tevent_req_callback_data( | |
2601 | req, struct smbd_echo_state); | |
2602 | ssize_t written; | |
2603 | int err; | |
2604 | ||
2605 | written = writev_recv(req, &err); | |
2606 | TALLOC_FREE(req); | |
2607 | state->write_req = NULL; | |
2608 | if (written == -1) { | |
2609 | DEBUG(1, ("writev to parent failed: %s\n", strerror(err))); | |
2610 | exit(1); | |
2611 | } | |
2612 | DEBUG(10,("echo_handler[%d]: forwarded pdu to main\n", (int)sys_getpid())); | |
2613 | smbd_echo_activate_writer(state); | |
2614 | } | |
2615 | ||
0b8eeb1e SM |
2616 | static bool smbd_echo_reply(struct smbd_echo_state *state, |
2617 | uint8_t *inbuf, size_t inbuf_len, | |
cad0c004 VL |
2618 | uint32_t seqnum) |
2619 | { | |
2620 | struct smb_request req; | |
2621 | uint16_t num_replies; | |
cad0c004 VL |
2622 | char *outbuf; |
2623 | bool ok; | |
2624 | ||
0633c0f6 | 2625 | if ((inbuf_len == 4) && (CVAL(inbuf, 0) == NBSSkeepalive)) { |
fd9effce VL |
2626 | DEBUG(10, ("Got netbios keepalive\n")); |
2627 | /* | |
2628 | * Just swallow it | |
2629 | */ | |
2630 | return true; | |
2631 | } | |
2632 | ||
cad0c004 VL |
2633 | if (inbuf_len < smb_size) { |
2634 | DEBUG(10, ("Got short packet: %d bytes\n", (int)inbuf_len)); | |
2635 | return false; | |
2636 | } | |
0b8eeb1e | 2637 | if (!valid_smb_header(state->sconn, inbuf)) { |
cad0c004 VL |
2638 | DEBUG(10, ("Got invalid SMB header\n")); |
2639 | return false; | |
2640 | } | |
2641 | ||
0b8eeb1e | 2642 | if (!init_smb_request(&req, state->sconn, inbuf, 0, false, |
d7bc5fe7 | 2643 | seqnum)) { |
cad0c004 VL |
2644 | return false; |
2645 | } | |
2646 | req.inbuf = inbuf; | |
2647 | ||
2648 | DEBUG(10, ("smbecho handler got cmd %d (%s)\n", (int)req.cmd, | |
2649 | smb_messages[req.cmd].name | |
2650 | ? smb_messages[req.cmd].name : "unknown")); | |
2651 | ||
2652 | if (req.cmd != SMBecho) { | |
2653 | return false; | |
2654 | } | |
2655 | if (req.wct < 1) { | |
2656 | return false; | |
2657 | } | |
2658 | ||
2659 | num_replies = SVAL(req.vwv+0, 0); | |
2660 | if (num_replies != 1) { | |
2661 | /* Not a Windows "Hey, you're still there?" request */ | |
2662 | return false; | |
2663 | } | |
2664 | ||
4f41be35 | 2665 | if (!create_outbuf(talloc_tos(), &req, (const char *)req.inbuf, &outbuf, |
cad0c004 VL |
2666 | 1, req.buflen)) { |
2667 | DEBUG(10, ("create_outbuf failed\n")); | |
2668 | return false; | |
2669 | } | |
2670 | req.outbuf = (uint8_t *)outbuf; | |
2671 | ||
2672 | SSVAL(req.outbuf, smb_vwv0, num_replies); | |
2673 | ||
2674 | if (req.buflen > 0) { | |
2675 | memcpy(smb_buf(req.outbuf), req.buf, req.buflen); | |
2676 | } | |
2677 | ||
1808dd0a | 2678 | ok = srv_send_smb(req.sconn, |
cad0c004 VL |
2679 | (char *)outbuf, |
2680 | true, seqnum+1, | |
2681 | false, &req.pcd); | |
2682 | TALLOC_FREE(outbuf); | |
2683 | if (!ok) { | |
2684 | exit(1); | |
2685 | } | |
2686 | ||
2687 | return true; | |
2688 | } | |
2689 | ||
2690 | static void smbd_echo_exit(struct tevent_context *ev, | |
2691 | struct tevent_fd *fde, uint16_t flags, | |
2692 | void *private_data) | |
2693 | { | |
2694 | DEBUG(2, ("smbd_echo_exit: lost connection to parent\n")); | |
2695 | exit(0); | |
2696 | } | |
2697 | ||
710e5d92 VL |
2698 | static void smbd_echo_got_packet(struct tevent_req *req); |
2699 | ||
cad0c004 VL |
2700 | static void smbd_echo_loop(struct smbd_server_connection *sconn, |
2701 | int parent_pipe) | |
2702 | { | |
2703 | struct smbd_echo_state *state; | |
710e5d92 | 2704 | struct tevent_req *read_req; |
cad0c004 VL |
2705 | |
2706 | state = talloc_zero(sconn, struct smbd_echo_state); | |
2707 | if (state == NULL) { | |
2708 | DEBUG(1, ("talloc failed\n")); | |
2709 | return; | |
2710 | } | |
2711 | state->sconn = sconn; | |
2712 | state->parent_pipe = parent_pipe; | |
2713 | state->ev = s3_tevent_context_init(state); | |
2714 | if (state->ev == NULL) { | |
2715 | DEBUG(1, ("tevent_context_init failed\n")); | |
2716 | TALLOC_FREE(state); | |
2717 | return; | |
2718 | } | |
2719 | state->parent_fde = tevent_add_fd(state->ev, state, parent_pipe, | |
2720 | TEVENT_FD_READ, smbd_echo_exit, | |
2721 | state); | |
2722 | if (state->parent_fde == NULL) { | |
2723 | DEBUG(1, ("tevent_add_fd failed\n")); | |
2724 | TALLOC_FREE(state); | |
2725 | return; | |
2726 | } | |
710e5d92 VL |
2727 | |
2728 | read_req = smbd_echo_read_send(state, state->ev, sconn); | |
2729 | if (read_req == NULL) { | |
2730 | DEBUG(1, ("smbd_echo_read_send failed\n")); | |
cad0c004 VL |
2731 | TALLOC_FREE(state); |
2732 | return; | |
2733 | } | |
710e5d92 | 2734 | tevent_req_set_callback(read_req, smbd_echo_got_packet, state); |
cad0c004 VL |
2735 | |
2736 | while (true) { | |
2737 | if (tevent_loop_once(state->ev) == -1) { | |
2738 | DEBUG(1, ("tevent_loop_once failed: %s\n", | |
2739 | strerror(errno))); | |
2740 | break; | |
2741 | } | |
2742 | } | |
2743 | TALLOC_FREE(state); | |
2744 | } | |
2745 | ||
710e5d92 VL |
2746 | static void smbd_echo_got_packet(struct tevent_req *req) |
2747 | { | |
2748 | struct smbd_echo_state *state = tevent_req_callback_data( | |
2749 | req, struct smbd_echo_state); | |
2750 | NTSTATUS status; | |
2751 | char *buf = NULL; | |
2752 | size_t buflen = 0; | |
2753 | uint32_t seqnum = 0; | |
2754 | bool reply; | |
2755 | ||
2756 | status = smbd_echo_read_recv(req, state, &buf, &buflen, &seqnum); | |
2757 | TALLOC_FREE(req); | |
2758 | if (!NT_STATUS_IS_OK(status)) { | |
2759 | DEBUG(1, ("smbd_echo_read_recv returned %s\n", | |
2760 | nt_errstr(status))); | |
2761 | exit(1); | |
2762 | } | |
2763 | ||
0b8eeb1e | 2764 | reply = smbd_echo_reply(state, (uint8_t *)buf, buflen, seqnum); |
710e5d92 VL |
2765 | if (!reply) { |
2766 | size_t num_pending; | |
2767 | struct iovec *tmp; | |
2768 | struct iovec *iov; | |
2769 | ||
2770 | num_pending = talloc_array_length(state->pending); | |
2771 | tmp = talloc_realloc(state, state->pending, struct iovec, | |
2772 | num_pending+1); | |
2773 | if (tmp == NULL) { | |
2774 | DEBUG(1, ("talloc_realloc failed\n")); | |
2775 | exit(1); | |
2776 | } | |
2777 | state->pending = tmp; | |
2778 | ||
2779 | if (buflen >= smb_size) { | |
2780 | /* | |
2781 | * place the seqnum in the packet so that the main process | |
2782 | * can reply with signing | |
2783 | */ | |
2784 | SIVAL(buf, smb_ss_field, seqnum); | |
2785 | SIVAL(buf, smb_ss_field+4, NT_STATUS_V(NT_STATUS_OK)); | |
2786 | } | |
2787 | ||
2788 | iov = &state->pending[num_pending]; | |
2789 | iov->iov_base = buf; | |
2790 | iov->iov_len = buflen; | |
2791 | ||
2792 | DEBUG(10,("echo_handler[%d]: forward to main\n", | |
2793 | (int)sys_getpid())); | |
2794 | smbd_echo_activate_writer(state); | |
2795 | } | |
2796 | ||
2797 | req = smbd_echo_read_send(state, state->ev, state->sconn); | |
2798 | if (req == NULL) { | |
2799 | DEBUG(1, ("smbd_echo_read_send failed\n")); | |
2800 | exit(1); | |
2801 | } | |
2802 | tevent_req_set_callback(req, smbd_echo_got_packet, state); | |
2803 | } | |
2804 | ||
2805 | ||
cad0c004 VL |
2806 | /* |
2807 | * Handle SMBecho requests in a forked child process | |
2808 | */ | |
8a2eff87 | 2809 | bool fork_echo_handler(struct smbd_server_connection *sconn) |
cad0c004 VL |
2810 | { |
2811 | int listener_pipe[2]; | |
2812 | int res; | |
2813 | pid_t child; | |
2814 | ||
2815 | res = pipe(listener_pipe); | |
2816 | if (res == -1) { | |
2817 | DEBUG(1, ("pipe() failed: %s\n", strerror(errno))); | |
2818 | return false; | |
2819 | } | |
2820 | sconn->smb1.echo_handler.socket_lock_fd = create_unlink_tmp(lp_lockdir()); | |
2821 | if (sconn->smb1.echo_handler.socket_lock_fd == -1) { | |
2822 | DEBUG(1, ("Could not create lock fd: %s\n", strerror(errno))); | |
2823 | goto fail; | |
2824 | } | |
2825 | ||
2826 | child = sys_fork(); | |
2827 | if (child == 0) { | |
2828 | NTSTATUS status; | |
2829 | ||
2830 | close(listener_pipe[0]); | |
342c79e2 | 2831 | set_blocking(listener_pipe[1], false); |
cad0c004 | 2832 | |
72fd7fb4 | 2833 | status = reinit_after_fork(sconn->msg_ctx, |
bf8cce18 | 2834 | sconn->ev_ctx, |
0f9d1482 | 2835 | false); |
cad0c004 VL |
2836 | if (!NT_STATUS_IS_OK(status)) { |
2837 | DEBUG(1, ("reinit_after_fork failed: %s\n", | |
2838 | nt_errstr(status))); | |
2839 | exit(1); | |
2840 | } | |
2841 | smbd_echo_loop(sconn, listener_pipe[1]); | |
2842 | exit(0); | |
2843 | } | |
2844 | close(listener_pipe[1]); | |
2845 | listener_pipe[1] = -1; | |
2846 | sconn->smb1.echo_handler.trusted_fd = listener_pipe[0]; | |
2847 | ||
2848 | DEBUG(10,("fork_echo_handler: main[%d] echo_child[%d]\n", (int)sys_getpid(), child)); | |
2849 | ||
2850 | /* | |
2851 | * Without smb signing this is the same as the normal smbd | |
2852 | * listener. This needs to change once signing comes in. | |
2853 | */ | |
bf8cce18 | 2854 | sconn->smb1.echo_handler.trusted_fde = tevent_add_fd(sconn->ev_ctx, |
cad0c004 VL |
2855 | sconn, |
2856 | sconn->smb1.echo_handler.trusted_fd, | |
bf8cce18 | 2857 | TEVENT_FD_READ, |
cad0c004 VL |
2858 | smbd_server_echo_handler, |
2859 | sconn); | |
2860 | if (sconn->smb1.echo_handler.trusted_fde == NULL) { | |
2861 | DEBUG(1, ("event_add_fd failed\n")); | |
2862 | goto fail; | |
2863 | } | |
2864 | ||
2865 | return true; | |
2866 | ||
2867 | fail: | |
2868 | if (listener_pipe[0] != -1) { | |
2869 | close(listener_pipe[0]); | |
2870 | } | |
2871 | if (listener_pipe[1] != -1) { | |
2872 | close(listener_pipe[1]); | |
2873 | } | |
2874 | sconn->smb1.echo_handler.trusted_fd = -1; | |
2875 | if (sconn->smb1.echo_handler.socket_lock_fd != -1) { | |
2876 | close(sconn->smb1.echo_handler.socket_lock_fd); | |
2877 | } | |
2878 | sconn->smb1.echo_handler.trusted_fd = -1; | |
2879 | sconn->smb1.echo_handler.socket_lock_fd = -1; | |
2880 | return false; | |
2881 | } | |
2882 | ||
f687d434 VL |
2883 | #if CLUSTER_SUPPORT |
2884 | ||
744cc264 VL |
2885 | static NTSTATUS smbd_register_ips(struct smbd_server_connection *sconn, |
2886 | struct sockaddr_storage *srv, | |
467208e9 VL |
2887 | struct sockaddr_storage *clnt) |
2888 | { | |
2889 | struct ctdbd_connection *cconn; | |
2890 | char tmp_addr[INET6_ADDRSTRLEN]; | |
2891 | char *addr; | |
2892 | ||
5648c3f6 | 2893 | cconn = messaging_ctdbd_connection(); |
467208e9 VL |
2894 | if (cconn == NULL) { |
2895 | return NT_STATUS_NO_MEMORY; | |
2896 | } | |
2897 | ||
fbf3d035 | 2898 | client_socket_addr(sconn->sock, tmp_addr, sizeof(tmp_addr)); |
467208e9 VL |
2899 | addr = talloc_strdup(cconn, tmp_addr); |
2900 | if (addr == NULL) { | |
2901 | return NT_STATUS_NO_MEMORY; | |
2902 | } | |
2903 | return ctdbd_register_ips(cconn, srv, clnt, release_ip, addr); | |
2904 | } | |
2905 | ||
f687d434 VL |
2906 | #endif |
2907 | ||
715933a3 SM |
2908 | static bool uid_in_use(const struct user_struct *user, uid_t uid) |
2909 | { | |
2910 | while (user) { | |
2911 | if (user->session_info && | |
2912 | (user->session_info->unix_token->uid == uid)) { | |
2913 | return true; | |
2914 | } | |
2915 | user = user->next; | |
2916 | } | |
2917 | return false; | |
2918 | } | |
2919 | ||
2920 | static bool gid_in_use(const struct user_struct *user, gid_t gid) | |
2921 | { | |
2922 | while (user) { | |
2923 | if (user->session_info != NULL) { | |
2924 | int i; | |
2925 | struct security_unix_token *utok; | |
2926 | ||
2927 | utok = user->session_info->unix_token; | |
2928 | if (utok->gid == gid) { | |
2929 | return true; | |
2930 | } | |
2931 | for(i=0; i<utok->ngroups; i++) { | |
2932 | if (utok->groups[i] == gid) { | |
2933 | return true; | |
2934 | } | |
2935 | } | |
2936 | } | |
2937 | user = user->next; | |
2938 | } | |
2939 | return false; | |
2940 | } | |
2941 | ||
2942 | static bool sid_in_use(const struct user_struct *user, | |
2943 | const struct dom_sid *psid) | |
2944 | { | |
2945 | while (user) { | |
2946 | struct security_token *tok; | |
2947 | ||
2948 | if (user->session_info == NULL) { | |
2949 | continue; | |
2950 | } | |
2951 | tok = user->session_info->security_token; | |
2952 | if (tok == NULL) { | |
2953 | /* | |
2954 | * Not sure session_info->security_token can | |
2955 | * ever be NULL. This check might be not | |
2956 | * necessary. | |
2957 | */ | |
2958 | continue; | |
2959 | } | |
2960 | if (security_token_has_sid(tok, psid)) { | |
2961 | return true; | |
2962 | } | |
2963 | user = user->next; | |
2964 | } | |
2965 | return false; | |
2966 | } | |
2967 | ||
2968 | static bool id_in_use(const struct user_struct *user, | |
2969 | const struct id_cache_ref *id) | |
2970 | { | |
2971 | switch(id->type) { | |
2972 | case UID: | |
2973 | return uid_in_use(user, id->id.uid); | |
2974 | case GID: | |
2975 | return gid_in_use(user, id->id.gid); | |
2976 | case SID: | |
2977 | return sid_in_use(user, &id->id.sid); | |
2978 | default: | |
2979 | break; | |
2980 | } | |
2981 | return false; | |
2982 | } | |
2983 | ||
2984 | static void smbd_id_cache_kill(struct messaging_context *msg_ctx, | |
2985 | void *private_data, | |
2986 | uint32_t msg_type, | |
2987 | struct server_id server_id, | |
2988 | DATA_BLOB* data) | |
2989 | { | |
2990 | const char *msg = (data && data->data) | |
2991 | ? (const char *)data->data : "<NULL>"; | |
2992 | struct user_struct *validated_users; | |
2993 | struct id_cache_ref id; | |
2994 | struct smbd_server_connection *sconn = | |
2995 | talloc_get_type_abort(private_data, | |
2996 | struct smbd_server_connection); | |
2997 | ||
2998 | validated_users = sconn->smb1.sessions.validated_users; | |
2999 | ||
3000 | if (!id_cache_ref_parse(msg, &id)) { | |
3001 | DEBUG(0, ("Invalid ?ID: %s\n", msg)); | |
3002 | return; | |
3003 | } | |
3004 | ||
3005 | if (id_in_use(validated_users, &id)) { | |
3006 | exit_server_cleanly(msg); | |
3007 | } | |
3008 | id_cache_delete_from_cache(&id); | |
3009 | } | |
3010 | ||
f2f55d70 JA |
3011 | /**************************************************************************** |
3012 | Process commands from the client | |
3013 | ****************************************************************************/ | |
3014 | ||
dd3a9279 AS |
3015 | void smbd_process(struct tevent_context *ev_ctx, |
3016 | struct smbd_server_connection *sconn) | |
f2f55d70 | 3017 | { |
27f812f3 | 3018 | TALLOC_CTX *frame = talloc_stackframe(); |
b764145a SM |
3019 | struct sockaddr_storage ss; |
3020 | struct sockaddr *sa = NULL; | |
db6d1c62 | 3021 | socklen_t sa_socklen; |
b764145a SM |
3022 | struct tsocket_address *local_address = NULL; |
3023 | struct tsocket_address *remote_address = NULL; | |
3d7521c8 | 3024 | const char *locaddr = NULL; |
b764145a | 3025 | const char *remaddr = NULL; |
a513086c | 3026 | char *rhost; |
b764145a | 3027 | int ret; |
27f812f3 | 3028 | |
aca920b2 | 3029 | if (lp_maxprotocol() >= PROTOCOL_SMB2_02) { |
d28fa8fa | 3030 | /* |
15d6c707 | 3031 | * We're not making the decision here, |
d28fa8fa JA |
3032 | * we're just allowing the client |
3033 | * to decide between SMB1 and SMB2 | |
3034 | * with the first negprot | |
3035 | * packet. | |
3036 | */ | |
37d71a56 | 3037 | sconn->using_smb2 = true; |
688945a9 SM |
3038 | } |
3039 | ||
27f812f3 | 3040 | /* Ensure child is set to blocking mode */ |
68e86969 | 3041 | set_blocking(sconn->sock,True); |
27f812f3 | 3042 | |
68e86969 VL |
3043 | set_socket_options(sconn->sock, "SO_KEEPALIVE"); |
3044 | set_socket_options(sconn->sock, lp_socket_options()); | |
27f812f3 | 3045 | |
b764145a | 3046 | sa = (struct sockaddr *)(void *)&ss; |
db6d1c62 SM |
3047 | sa_socklen = sizeof(ss); |
3048 | ret = getpeername(sconn->sock, sa, &sa_socklen); | |
b764145a SM |
3049 | if (ret != 0) { |
3050 | int level = (errno == ENOTCONN)?2:0; | |
3051 | DEBUG(level,("getpeername() failed - %s\n", strerror(errno))); | |
3549425b | 3052 | exit_server_cleanly("getpeername() failed.\n"); |
b764145a | 3053 | } |
37d71a56 | 3054 | ret = tsocket_address_bsd_from_sockaddr(sconn, |
db6d1c62 | 3055 | sa, sa_socklen, |
b764145a SM |
3056 | &remote_address); |
3057 | if (ret != 0) { | |
3058 | DEBUG(0,("%s: tsocket_address_bsd_from_sockaddr remote failed - %s\n", | |
3059 | __location__, strerror(errno))); | |
3549425b | 3060 | exit_server_cleanly("tsocket_address_bsd_from_sockaddr remote failed.\n"); |
b764145a SM |
3061 | } |
3062 | ||
3063 | sa = (struct sockaddr *)(void *)&ss; | |
db6d1c62 SM |
3064 | sa_socklen = sizeof(ss); |
3065 | ret = getsockname(sconn->sock, sa, &sa_socklen); | |
b764145a SM |
3066 | if (ret != 0) { |
3067 | int level = (errno == ENOTCONN)?2:0; | |
3068 | DEBUG(level,("getsockname() failed - %s\n", strerror(errno))); | |
3549425b | 3069 | exit_server_cleanly("getsockname() failed.\n"); |
b764145a | 3070 | } |
37d71a56 | 3071 | ret = tsocket_address_bsd_from_sockaddr(sconn, |
db6d1c62 | 3072 | sa, sa_socklen, |
b764145a SM |
3073 | &local_address); |
3074 | if (ret != 0) { | |
3075 | DEBUG(0,("%s: tsocket_address_bsd_from_sockaddr remote failed - %s\n", | |
3076 | __location__, strerror(errno))); | |
3549425b | 3077 | exit_server_cleanly("tsocket_address_bsd_from_sockaddr remote failed.\n"); |
b764145a SM |
3078 | } |
3079 | ||
37d71a56 VL |
3080 | sconn->local_address = local_address; |
3081 | sconn->remote_address = remote_address; | |
b764145a | 3082 | |
3d7521c8 SM |
3083 | if (tsocket_address_is_inet(local_address, "ip")) { |
3084 | locaddr = tsocket_address_inet_addr_string( | |
3085 | sconn->local_address, | |
3086 | talloc_tos()); | |
3087 | if (locaddr == NULL) { | |
3088 | DEBUG(0,("%s: tsocket_address_inet_addr_string local failed - %s\n", | |
3089 | __location__, strerror(errno))); | |
3090 | exit_server_cleanly("tsocket_address_inet_addr_string local failed.\n"); | |
3091 | } | |
3092 | } else { | |
3093 | locaddr = "0.0.0.0"; | |
3094 | } | |
3095 | ||
b764145a SM |
3096 | if (tsocket_address_is_inet(remote_address, "ip")) { |
3097 | remaddr = tsocket_address_inet_addr_string( | |
37d71a56 | 3098 | sconn->remote_address, |
b764145a SM |
3099 | talloc_tos()); |
3100 | if (remaddr == NULL) { | |
ad0f765a AS |
3101 | DEBUG(0,("%s: tsocket_address_inet_addr_string remote failed - %s\n", |
3102 | __location__, strerror(errno))); | |
3103 | exit_server_cleanly("tsocket_address_inet_addr_string remote failed.\n"); | |
b764145a SM |
3104 | } |
3105 | } else { | |
3106 | remaddr = "0.0.0.0"; | |
3107 | } | |
3108 | ||
27f812f3 SM |
3109 | /* this is needed so that we get decent entries |
3110 | in smbstatus for port 445 connects */ | |
b764145a | 3111 | set_remote_machine_name(remaddr, false); |
03455519 | 3112 | reload_services(sconn, conn_snum_used, true); |
27f812f3 | 3113 | |
ac647d03 VL |
3114 | /* |
3115 | * Before the first packet, check the global hosts allow/ hosts deny | |
3116 | * parameters before doing any parsing of packets passed to us by the | |
3117 | * client. This prevents attacks on our parsing code from hosts not in | |
3118 | * the hosts allow list. | |
3119 | */ | |
3120 | ||
a513086c AS |
3121 | ret = get_remote_hostname(remote_address, |
3122 | &rhost, | |
3123 | talloc_tos()); | |
3124 | if (ret < 0) { | |
3125 | DEBUG(0,("%s: get_remote_hostname failed - %s\n", | |
3126 | __location__, strerror(errno))); | |
3127 | exit_server_cleanly("get_remote_hostname failed.\n"); | |
3128 | } | |
3129 | if (strequal(rhost, "UNKNOWN")) { | |
3130 | rhost = talloc_strdup(talloc_tos(), remaddr); | |
3131 | } | |
3132 | sconn->remote_hostname = talloc_move(sconn, &rhost); | |
3133 | ||
3d7521c8 SM |
3134 | sub_set_socket_ids(remaddr, |
3135 | sconn->remote_hostname, | |
3136 | locaddr); | |
3137 | ||
70c5bed4 | 3138 | if (!allow_access(lp_hostsdeny(-1), lp_hostsallow(-1), |
a513086c AS |
3139 | sconn->remote_hostname, |
3140 | remaddr)) { | |
ac647d03 VL |
3141 | /* |
3142 | * send a negative session response "not listening on calling | |
3143 | * name" | |
3144 | */ | |
3145 | unsigned char buf[5] = {0x83, 0, 0, 1, 0x81}; | |
b764145a SM |
3146 | DEBUG( 1, ("Connection denied from %s to %s\n", |
3147 | tsocket_address_string(remote_address, talloc_tos()), | |
3148 | tsocket_address_string(local_address, talloc_tos()))); | |
1808dd0a | 3149 | (void)srv_send_smb(sconn,(char *)buf, false, |
c16c90a1 | 3150 | 0, false, NULL); |
ac647d03 VL |
3151 | exit_server_cleanly("connection denied"); |
3152 | } | |
3153 | ||
b764145a SM |
3154 | DEBUG(10, ("Connection allowed from %s to %s\n", |
3155 | tsocket_address_string(remote_address, talloc_tos()), | |
3156 | tsocket_address_string(local_address, talloc_tos()))); | |
3157 | ||
27f812f3 SM |
3158 | init_modules(); |
3159 | ||
54c51a66 | 3160 | smb_perfcount_init(); |
3161 | ||
27f812f3 SM |
3162 | if (!init_account_policy()) { |
3163 | exit_server("Could not open account policy tdb.\n"); | |
3164 | } | |
3165 | ||
3166 | if (*lp_rootdir()) { | |
3167 | if (chroot(lp_rootdir()) != 0) { | |
f6821a15 JA |
3168 | DEBUG(0,("Failed to change root to %s\n", lp_rootdir())); |
3169 | exit_server("Failed to chroot()"); | |
3170 | } | |
3171 | if (chdir("/") == -1) { | |
3172 | DEBUG(0,("Failed to chdir to / on chroot to %s\n", lp_rootdir())); | |
27f812f3 SM |
3173 | exit_server("Failed to chroot()"); |
3174 | } | |
3175 | DEBUG(0,("Changed root to %s\n", lp_rootdir())); | |
3176 | } | |
3177 | ||
37d71a56 | 3178 | if (!srv_init_signing(sconn)) { |
c16c90a1 SM |
3179 | exit_server("Failed to init smb_signing"); |
3180 | } | |
3181 | ||
27f812f3 | 3182 | /* Setup oplocks */ |
21de6735 | 3183 | if (!init_oplocks(sconn)) |
27f812f3 SM |
3184 | exit_server("Failed to init oplocks"); |
3185 | ||
27f812f3 | 3186 | /* register our message handlers */ |
d492a437 | 3187 | messaging_register(sconn->msg_ctx, sconn, |
27f812f3 | 3188 | MSG_SMB_FORCE_TDIS, msg_force_tdis); |
4d44f879 | 3189 | messaging_register(sconn->msg_ctx, sconn, |
27f812f3 | 3190 | MSG_SMB_CLOSE_FILE, msg_close_file); |
e09c6755 | 3191 | messaging_register(sconn->msg_ctx, sconn, |
173ea716 | 3192 | MSG_SMB_FILE_RENAME, msg_file_was_renamed); |
27f812f3 | 3193 | |
715933a3 SM |
3194 | id_cache_register_msgs(sconn->msg_ctx); |
3195 | messaging_deregister(sconn->msg_ctx, ID_CACHE_KILL, NULL); | |
3196 | messaging_register(sconn->msg_ctx, sconn, | |
3197 | ID_CACHE_KILL, smbd_id_cache_kill); | |
3198 | ||
e412b8bf SM |
3199 | messaging_deregister(sconn->msg_ctx, |
3200 | MSG_SMB_CONF_UPDATED, sconn->ev_ctx); | |
3201 | messaging_register(sconn->msg_ctx, sconn, | |
3202 | MSG_SMB_CONF_UPDATED, smbd_conf_updated); | |
3203 | ||
5a4d6181 AS |
3204 | /* |
3205 | * Use the default MSG_DEBUG handler to avoid rebroadcasting | |
3206 | * MSGs to all child processes | |
3207 | */ | |
b71f2af1 | 3208 | messaging_deregister(sconn->msg_ctx, |
5a4d6181 | 3209 | MSG_DEBUG, NULL); |
b71f2af1 | 3210 | messaging_register(sconn->msg_ctx, NULL, |
5a4d6181 AS |
3211 | MSG_DEBUG, debug_message); |
3212 | ||
27f812f3 | 3213 | if ((lp_keepalive() != 0) |
dd3a9279 | 3214 | && !(event_add_idle(ev_ctx, NULL, |
27f812f3 SM |
3215 | timeval_set(lp_keepalive(), 0), |
3216 | "keepalive", keepalive_fn, | |
d911bd5c | 3217 | sconn))) { |
27f812f3 SM |
3218 | DEBUG(0, ("Could not add keepalive event\n")); |
3219 | exit(1); | |
3220 | } | |
3221 | ||
dd3a9279 | 3222 | if (!(event_add_idle(ev_ctx, NULL, |
27f812f3 | 3223 | timeval_set(IDLE_CLOSED_TIMEOUT, 0), |
37d71a56 | 3224 | "deadtime", deadtime_fn, sconn))) { |
27f812f3 SM |
3225 | DEBUG(0, ("Could not add deadtime event\n")); |
3226 | exit(1); | |
aeb798c3 | 3227 | } |
27f812f3 | 3228 | |
dd3a9279 | 3229 | if (!(event_add_idle(ev_ctx, NULL, |
0b188e77 | 3230 | timeval_set(SMBD_HOUSEKEEPING_INTERVAL, 0), |
babfe237 | 3231 | "housekeeping", housekeeping_fn, sconn))) { |
27f812f3 SM |
3232 | DEBUG(0, ("Could not add housekeeping event\n")); |
3233 | exit(1); | |
3234 | } | |
3235 | ||
3236 | #ifdef CLUSTER_SUPPORT | |
3237 | ||
3238 | if (lp_clustering()) { | |
3239 | /* | |
3240 | * We need to tell ctdb about our client's TCP | |
3241 | * connection, so that for failover ctdbd can send | |
3242 | * tickle acks, triggering a reconnection by the | |
3243 | * client. | |
3244 | */ | |
3245 | ||
3246 | struct sockaddr_storage srv, clnt; | |
3247 | ||
f83e7d8f | 3248 | if (client_get_tcp_info(sconn->sock, &srv, &clnt) == 0) { |
27f812f3 | 3249 | NTSTATUS status; |
744cc264 | 3250 | status = smbd_register_ips(sconn, &srv, &clnt); |
27f812f3 SM |
3251 | if (!NT_STATUS_IS_OK(status)) { |
3252 | DEBUG(0, ("ctdbd_register_ips failed: %s\n", | |
3253 | nt_errstr(status))); | |
3254 | } | |
3255 | } else | |
3256 | { | |
3257 | DEBUG(0,("Unable to get tcp info for " | |
3258 | "CTDB_CONTROL_TCP_CLIENT: %s\n", | |
3259 | strerror(errno))); | |
3260 | } | |
3261 | } | |
3262 | ||
3263 | #endif | |
3264 | ||
37d71a56 | 3265 | sconn->nbt.got_session = false; |
f554af18 | 3266 | |
37d71a56 | 3267 | sconn->smb1.negprot.max_recv = MIN(lp_maxxmit(),BUFFER_SIZE); |
27f812f3 | 3268 | |
37d71a56 VL |
3269 | sconn->smb1.sessions.done_sesssetup = false; |
3270 | sconn->smb1.sessions.max_send = BUFFER_SIZE; | |
3271 | sconn->smb1.sessions.last_session_tag = UID_FIELD_INVALID; | |
75d03970 | 3272 | /* users from session setup */ |
37d71a56 | 3273 | sconn->smb1.sessions.session_userlist = NULL; |
75d03970 | 3274 | /* workgroup from session setup. */ |
37d71a56 | 3275 | sconn->smb1.sessions.session_workgroup = NULL; |
75d03970 | 3276 | /* this holds info on user ids that are already validated for this VC */ |
37d71a56 VL |
3277 | sconn->smb1.sessions.validated_users = NULL; |
3278 | sconn->smb1.sessions.next_vuid = VUID_OFFSET; | |
3279 | sconn->smb1.sessions.num_validated_vuids = 0; | |
356f0336 | 3280 | |
37d71a56 VL |
3281 | conn_init(sconn); |
3282 | if (!init_dptrs(sconn)) { | |
59c3f5e3 SM |
3283 | exit_server("init_dptrs() failed"); |
3284 | } | |
c8620180 | 3285 | |
dd3a9279 | 3286 | sconn->smb1.fde = event_add_fd(ev_ctx, |
37d71a56 | 3287 | sconn, |
68e86969 | 3288 | sconn->sock, |
ebc860eb SM |
3289 | EVENT_FD_READ, |
3290 | smbd_server_connection_handler, | |
37d71a56 VL |
3291 | sconn); |
3292 | if (!sconn->smb1.fde) { | |
aeb798c3 SM |
3293 | exit_server("failed to create smbd_server_connection fde"); |
3294 | } | |
3295 | ||
27f812f3 SM |
3296 | TALLOC_FREE(frame); |
3297 | ||
b2d01bd2 | 3298 | while (True) { |
27f812f3 | 3299 | frame = talloc_stackframe_pool(8192); |
dc76502c | 3300 | |
c3250149 | 3301 | errno = 0; |
ed85e9fe JA |
3302 | if (tevent_loop_once(ev_ctx) == -1) { |
3303 | if (errno != EINTR) { | |
3304 | DEBUG(3, ("tevent_loop_once failed: %s," | |
3305 | " exiting\n", strerror(errno) )); | |
3306 | break; | |
3307 | } | |
b2d01bd2 AT |
3308 | } |
3309 | ||
929e1d99 | 3310 | TALLOC_FREE(frame); |
b2d01bd2 | 3311 | } |
27f812f3 SM |
3312 | |
3313 | exit_server_cleanly(NULL); | |
c3effa8b | 3314 | } |
d94e9c80 VL |
3315 | |
3316 | bool req_is_in_chain(struct smb_request *req) | |
3317 | { | |
4f41be35 | 3318 | if (req->vwv != (const uint16_t *)(req->inbuf+smb_vwv)) { |
d94e9c80 VL |
3319 | /* |
3320 | * We're right now handling a subsequent request, so we must | |
3321 | * be in a chain | |
3322 | */ | |
3323 | return true; | |
3324 | } | |
3325 | ||
3326 | if (!is_andx_req(req->cmd)) { | |
3327 | return false; | |
3328 | } | |
3329 | ||
3330 | if (req->wct < 2) { | |
3331 | /* | |
3332 | * Okay, an illegal request, but definitely not chained :-) | |
3333 | */ | |
3334 | return false; | |
3335 | } | |
3336 | ||
3337 | return (CVAL(req->vwv+0, 0) != 0xFF); | |
3338 | } |