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nfs4acls: Use talloc_realloc()
[Samba.git] / source3 / smbd / process.c
blob6c8a31c594edb2ad6e85522e14609f3ba0b8fa62
1 /*
2 Unix SMB/CIFS implementation.
3 process incoming packets - main loop
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Volker Lendecke 2005-2007
6
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
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
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.
16
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>.
19 */
20
21 #include "includes.h"
22 #include "../lib/tsocket/tsocket.h"
23 #include "system/filesys.h"
24 #include "smbd/smbd.h"
25 #include "smbd/globals.h"
26 #include "librpc/gen_ndr/netlogon.h"
27 #include "../lib/async_req/async_sock.h"
28 #include "ctdbd_conn.h"
29 #include "../lib/util/select.h"
30 #include "printing/queue_process.h"
31 #include "system/select.h"
32 #include "passdb.h"
33 #include "auth.h"
34 #include "messages.h"
35 #include "smbprofile.h"
36 #include "rpc_server/spoolss/srv_spoolss_nt.h"
37 #include "libsmb/libsmb.h"
38 #include "../lib/util/tevent_ntstatus.h"
39 #include "../libcli/security/dom_sid.h"
40 #include "../libcli/security/security_token.h"
41 #include "lib/id_cache.h"
42 #include "lib/sys_rw_data.h"
43 #include "serverid.h"
44 #include "system/threads.h"
45
46 /* Internal message queue for deferred opens. */
47 struct pending_message_list {
48 struct pending_message_list *next, *prev;
49 struct timeval request_time; /* When was this first issued? */
50 struct smbd_server_connection *sconn;
51 struct smbXsrv_connection *xconn;
52 struct tevent_timer *te;
53 struct smb_perfcount_data pcd;
54 uint32_t seqnum;
55 bool encrypted;
56 bool processed;
57 DATA_BLOB buf;
58 struct deferred_open_record *open_rec;
59 };
60
61 static void construct_reply_common(uint8_t cmd, const uint8_t *inbuf,
62 char *outbuf);
63 static struct pending_message_list *get_deferred_open_message_smb(
64 struct smbd_server_connection *sconn, uint64_t mid);
65 static bool smb_splice_chain(uint8_t **poutbuf, const uint8_t *andx_buf);
66
67 static void smbd_echo_init(struct smbXsrv_connection *xconn)
68 {
69 xconn->smb1.echo_handler.trusted_fd = -1;
70 xconn->smb1.echo_handler.socket_lock_fd = -1;
71 #ifdef HAVE_ROBUST_MUTEXES
72 xconn->smb1.echo_handler.socket_mutex = NULL;
73 #endif
74 }
75
76 static bool smbd_echo_active(struct smbXsrv_connection *xconn)
77 {
78 if (xconn->smb1.echo_handler.socket_lock_fd != -1) {
79 return true;
80 }
81
82 #ifdef HAVE_ROBUST_MUTEXES
83 if (xconn->smb1.echo_handler.socket_mutex != NULL) {
84 return true;
85 }
86 #endif
87
88 return false;
89 }
90
91 static bool smbd_lock_socket_internal(struct smbXsrv_connection *xconn)
92 {
93 if (!smbd_echo_active(xconn)) {
94 return true;
95 }
96
97 xconn->smb1.echo_handler.ref_count++;
98
99 if (xconn->smb1.echo_handler.ref_count > 1) {
100 return true;
101 }
102
103 DEBUG(10,("pid[%d] wait for socket lock\n", (int)getpid()));
104
105 #ifdef HAVE_ROBUST_MUTEXES
106 if (xconn->smb1.echo_handler.socket_mutex != NULL) {
107 int ret = EINTR;
108
109 while (ret == EINTR) {
110 ret = pthread_mutex_lock(
111 xconn->smb1.echo_handler.socket_mutex);
112 if (ret == 0) {
113 break;
114 }
115 }
116 if (ret != 0) {
117 DEBUG(1, ("pthread_mutex_lock failed: %s\n",
118 strerror(ret)));
119 return false;
120 }
121 }
122 #endif
123
124 if (xconn->smb1.echo_handler.socket_lock_fd != -1) {
125 bool ok;
126
127 do {
128 ok = fcntl_lock(
129 xconn->smb1.echo_handler.socket_lock_fd,
130 F_SETLKW, 0, 0, F_WRLCK);
131 } while (!ok && (errno == EINTR));
132
133 if (!ok) {
134 DEBUG(1, ("fcntl_lock failed: %s\n", strerror(errno)));
135 return false;
136 }
137 }
138
139 DEBUG(10,("pid[%d] got socket lock\n", (int)getpid()));
140
141 return true;
142 }
143
144 void smbd_lock_socket(struct smbXsrv_connection *xconn)
145 {
146 if (!smbd_lock_socket_internal(xconn)) {
147 exit_server_cleanly("failed to lock socket");
148 }
149 }
150
151 static bool smbd_unlock_socket_internal(struct smbXsrv_connection *xconn)
152 {
153 if (!smbd_echo_active(xconn)) {
154 return true;
155 }
156
157 xconn->smb1.echo_handler.ref_count--;
158
159 if (xconn->smb1.echo_handler.ref_count > 0) {
160 return true;
161 }
162
163 #ifdef HAVE_ROBUST_MUTEXES
164 if (xconn->smb1.echo_handler.socket_mutex != NULL) {
165 int ret = EINTR;
166
167 while (ret == EINTR) {
168 ret = pthread_mutex_unlock(
169 xconn->smb1.echo_handler.socket_mutex);
170 if (ret == 0) {
171 break;
172 }
173 }
174 if (ret != 0) {
175 DEBUG(1, ("pthread_mutex_unlock failed: %s\n",
176 strerror(ret)));
177 return false;
178 }
179 }
180 #endif
181
182 if (xconn->smb1.echo_handler.socket_lock_fd != -1) {
183 bool ok;
184
185 do {
186 ok = fcntl_lock(
187 xconn->smb1.echo_handler.socket_lock_fd,
188 F_SETLKW, 0, 0, F_UNLCK);
189 } while (!ok && (errno == EINTR));
190
191 if (!ok) {
192 DEBUG(1, ("fcntl_lock failed: %s\n", strerror(errno)));
193 return false;
194 }
195 }
196
197 DEBUG(10,("pid[%d] unlocked socket\n", (int)getpid()));
198
199 return true;
200 }
201
202 void smbd_unlock_socket(struct smbXsrv_connection *xconn)
203 {
204 if (!smbd_unlock_socket_internal(xconn)) {
205 exit_server_cleanly("failed to unlock socket");
206 }
207 }
208
209 /* Accessor function for smb_read_error for smbd functions. */
210
211 /****************************************************************************
212 Send an smb to a fd.
213 ****************************************************************************/
214
215 bool srv_send_smb(struct smbXsrv_connection *xconn, char *buffer,
216 bool do_signing, uint32_t seqnum,
217 bool do_encrypt,
218 struct smb_perfcount_data *pcd)
219 {
220 size_t len = 0;
221 ssize_t ret;
222 char *buf_out = buffer;
223
224 if (!NT_STATUS_IS_OK(xconn->transport.status)) {
225 /*
226 * we're not supposed to do any io
227 */
228 return true;
229 }
230
231 smbd_lock_socket(xconn);
232
233 if (do_signing) {
234 /* Sign the outgoing packet if required. */
235 srv_calculate_sign_mac(xconn, buf_out, seqnum);
236 }
237
238 if (do_encrypt) {
239 NTSTATUS status = srv_encrypt_buffer(xconn, buffer, &buf_out);
240 if (!NT_STATUS_IS_OK(status)) {
241 DEBUG(0, ("send_smb: SMB encryption failed "
242 "on outgoing packet! Error %s\n",
243 nt_errstr(status) ));
244 ret = -1;
245 goto out;
246 }
247 }
248
249 len = smb_len_large(buf_out) + 4;
250
251 ret = write_data(xconn->transport.sock, buf_out, len);
252 if (ret <= 0) {
253 int saved_errno = errno;
254 /*
255 * Try and give an error message saying what
256 * client failed.
257 */
258 DEBUG(1,("pid[%d] Error writing %d bytes to client %s. %d. (%s)\n",
259 (int)getpid(), (int)len,
260 smbXsrv_connection_dbg(xconn),
261 (int)ret, strerror(saved_errno)));
262 errno = saved_errno;
263
264 srv_free_enc_buffer(xconn, buf_out);
265 goto out;
266 }
267
268 SMB_PERFCOUNT_SET_MSGLEN_OUT(pcd, len);
269 srv_free_enc_buffer(xconn, buf_out);
270 out:
271 SMB_PERFCOUNT_END(pcd);
272
273 smbd_unlock_socket(xconn);
274 return (ret > 0);
275 }
276
277 /*******************************************************************
278 Setup the word count and byte count for a smb message.
279 ********************************************************************/
280
281 int srv_set_message(char *buf,
282 int num_words,
283 int num_bytes,
284 bool zero)
285 {
286 if (zero && (num_words || num_bytes)) {
287 memset(buf + smb_size,'\0',num_words*2 + num_bytes);
288 }
289 SCVAL(buf,smb_wct,num_words);
290 SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes);
291 smb_setlen(buf,(smb_size + num_words*2 + num_bytes - 4));
292 return (smb_size + num_words*2 + num_bytes);
293 }
294
295 static bool valid_smb_header(const uint8_t *inbuf)
296 {
297 if (is_encrypted_packet(inbuf)) {
298 return true;
299 }
300 /*
301 * This used to be (strncmp(smb_base(inbuf),"\377SMB",4) == 0)
302 * but it just looks weird to call strncmp for this one.
303 */
304 return (IVAL(smb_base(inbuf), 0) == 0x424D53FF);
305 }
306
307 /* Socket functions for smbd packet processing. */
308
309 static bool valid_packet_size(size_t len)
310 {
311 /*
312 * A WRITEX with CAP_LARGE_WRITEX can be 64k worth of data plus 65 bytes
313 * of header. Don't print the error if this fits.... JRA.
314 */
315
316 if (len > (LARGE_WRITEX_BUFFER_SIZE + LARGE_WRITEX_HDR_SIZE)) {
317 DEBUG(0,("Invalid packet length! (%lu bytes).\n",
318 (unsigned long)len));
319 return false;
320 }
321 return true;
322 }
323
324 static NTSTATUS read_packet_remainder(int fd, char *buffer,
325 unsigned int timeout, ssize_t len)
326 {
327 NTSTATUS status;
328
329 if (len <= 0) {
330 return NT_STATUS_OK;
331 }
332
333 status = read_fd_with_timeout(fd, buffer, len, len, timeout, NULL);
334 if (!NT_STATUS_IS_OK(status)) {
335 char addr[INET6_ADDRSTRLEN];
336 DEBUG(0, ("read_fd_with_timeout failed for client %s read "
337 "error = %s.\n",
338 get_peer_addr(fd, addr, sizeof(addr)),
339 nt_errstr(status)));
340 }
341 return status;
342 }
343
344 /****************************************************************************
345 Attempt a zerocopy writeX read. We know here that len > smb_size-4
346 ****************************************************************************/
347
348 /*
349 * Unfortunately, earlier versions of smbclient/libsmbclient
350 * don't send this "standard" writeX header. I've fixed this
351 * for 3.2 but we'll use the old method with earlier versions.
352 * Windows and CIFSFS at least use this standard size. Not
353 * sure about MacOSX.
354 */
355
356 #define STANDARD_WRITE_AND_X_HEADER_SIZE (smb_size - 4 + /* basic header */ \
357 (2*14) + /* word count (including bcc) */ \
358 1 /* pad byte */)
359
360 static NTSTATUS receive_smb_raw_talloc_partial_read(TALLOC_CTX *mem_ctx,
361 const char lenbuf[4],
362 struct smbXsrv_connection *xconn,
363 int sock,
364 char **buffer,
365 unsigned int timeout,
366 size_t *p_unread,
367 size_t *len_ret)
368 {
369 /* Size of a WRITEX call (+4 byte len). */
370 char writeX_header[4 + STANDARD_WRITE_AND_X_HEADER_SIZE];
371 ssize_t len = smb_len_large(lenbuf); /* Could be a UNIX large writeX. */
372 ssize_t toread;
373 NTSTATUS status;
374
375 memcpy(writeX_header, lenbuf, 4);
376
377 status = read_fd_with_timeout(
378 sock, writeX_header + 4,
379 STANDARD_WRITE_AND_X_HEADER_SIZE,
380 STANDARD_WRITE_AND_X_HEADER_SIZE,
381 timeout, NULL);
382
383 if (!NT_STATUS_IS_OK(status)) {
384 DEBUG(0, ("read_fd_with_timeout failed for client %s read "
385 "error = %s.\n",
386 smbXsrv_connection_dbg(xconn),
387 nt_errstr(status)));
388 return status;
389 }
390
391 /*
392 * Ok - now try and see if this is a possible
393 * valid writeX call.
394 */
395
396 if (is_valid_writeX_buffer(xconn, (uint8_t *)writeX_header)) {
397 /*
398 * If the data offset is beyond what
399 * we've read, drain the extra bytes.
400 */
401 uint16_t doff = SVAL(writeX_header,smb_vwv11);
402 ssize_t newlen;
403
404 if (doff > STANDARD_WRITE_AND_X_HEADER_SIZE) {
405 size_t drain = doff - STANDARD_WRITE_AND_X_HEADER_SIZE;
406 if (drain_socket(sock, drain) != drain) {
407 smb_panic("receive_smb_raw_talloc_partial_read:"
408 " failed to drain pending bytes");
409 }
410 } else {
411 doff = STANDARD_WRITE_AND_X_HEADER_SIZE;
412 }
413
414 /* Spoof down the length and null out the bcc. */
415 set_message_bcc(writeX_header, 0);
416 newlen = smb_len(writeX_header);
417
418 /* Copy the header we've written. */
419
420 *buffer = (char *)talloc_memdup(mem_ctx,
421 writeX_header,
422 sizeof(writeX_header));
423
424 if (*buffer == NULL) {
425 DEBUG(0, ("Could not allocate inbuf of length %d\n",
426 (int)sizeof(writeX_header)));
427 return NT_STATUS_NO_MEMORY;
428 }
429
430 /* Work out the remaining bytes. */
431 *p_unread = len - STANDARD_WRITE_AND_X_HEADER_SIZE;
432 *len_ret = newlen + 4;
433 return NT_STATUS_OK;
434 }
435
436 if (!valid_packet_size(len)) {
437 return NT_STATUS_INVALID_PARAMETER;
438 }
439
440 /*
441 * Not a valid writeX call. Just do the standard
442 * talloc and return.
443 */
444
445 *buffer = talloc_array(mem_ctx, char, len+4);
446
447 if (*buffer == NULL) {
448 DEBUG(0, ("Could not allocate inbuf of length %d\n",
449 (int)len+4));
450 return NT_STATUS_NO_MEMORY;
451 }
452
453 /* Copy in what we already read. */
454 memcpy(*buffer,
455 writeX_header,
456 4 + STANDARD_WRITE_AND_X_HEADER_SIZE);
457 toread = len - STANDARD_WRITE_AND_X_HEADER_SIZE;
458
459 if(toread > 0) {
460 status = read_packet_remainder(
461 sock,
462 (*buffer) + 4 + STANDARD_WRITE_AND_X_HEADER_SIZE,
463 timeout, toread);
464
465 if (!NT_STATUS_IS_OK(status)) {
466 DEBUG(10, ("receive_smb_raw_talloc_partial_read: %s\n",
467 nt_errstr(status)));
468 return status;
469 }
470 }
471
472 *len_ret = len + 4;
473 return NT_STATUS_OK;
474 }
475
476 static NTSTATUS receive_smb_raw_talloc(TALLOC_CTX *mem_ctx,
477 struct smbXsrv_connection *xconn,
478 int sock,
479 char **buffer, unsigned int timeout,
480 size_t *p_unread, size_t *plen)
481 {
482 char lenbuf[4];
483 size_t len;
484 int min_recv_size = lp_min_receive_file_size();
485 NTSTATUS status;
486
487 *p_unread = 0;
488
489 status = read_smb_length_return_keepalive(sock, lenbuf, timeout,
490 &len);
491 if (!NT_STATUS_IS_OK(status)) {
492 return status;
493 }
494
495 if (CVAL(lenbuf,0) == 0 && min_recv_size &&
496 (smb_len_large(lenbuf) > /* Could be a UNIX large writeX. */
497 (min_recv_size + STANDARD_WRITE_AND_X_HEADER_SIZE)) &&
498 !srv_is_signing_active(xconn) &&
499 xconn->smb1.echo_handler.trusted_fde == NULL) {
500
501 return receive_smb_raw_talloc_partial_read(
502 mem_ctx, lenbuf, xconn, sock, buffer, timeout,
503 p_unread, plen);
504 }
505
506 if (!valid_packet_size(len)) {
507 return NT_STATUS_INVALID_PARAMETER;
508 }
509
510 /*
511 * The +4 here can't wrap, we've checked the length above already.
512 */
513
514 *buffer = talloc_array(mem_ctx, char, len+4);
515
516 if (*buffer == NULL) {
517 DEBUG(0, ("Could not allocate inbuf of length %d\n",
518 (int)len+4));
519 return NT_STATUS_NO_MEMORY;
520 }
521
522 memcpy(*buffer, lenbuf, sizeof(lenbuf));
523
524 status = read_packet_remainder(sock, (*buffer)+4, timeout, len);
525 if (!NT_STATUS_IS_OK(status)) {
526 return status;
527 }
528
529 *plen = len + 4;
530 return NT_STATUS_OK;
531 }
532
533 static NTSTATUS receive_smb_talloc(TALLOC_CTX *mem_ctx,
534 struct smbXsrv_connection *xconn,
535 int sock,
536 char **buffer, unsigned int timeout,
537 size_t *p_unread, bool *p_encrypted,
538 size_t *p_len,
539 uint32_t *seqnum,
540 bool trusted_channel)
541 {
542 size_t len = 0;
543 NTSTATUS status;
544
545 *p_encrypted = false;
546
547 status = receive_smb_raw_talloc(mem_ctx, xconn, sock, buffer, timeout,
548 p_unread, &len);
549 if (!NT_STATUS_IS_OK(status)) {
550 DEBUG(NT_STATUS_EQUAL(status, NT_STATUS_END_OF_FILE)?5:1,
551 ("receive_smb_raw_talloc failed for client %s "
552 "read error = %s.\n",
553 smbXsrv_connection_dbg(xconn),
554 nt_errstr(status)) );
555 return status;
556 }
557
558 if (is_encrypted_packet((uint8_t *)*buffer)) {
559 status = srv_decrypt_buffer(xconn, *buffer);
560 if (!NT_STATUS_IS_OK(status)) {
561 DEBUG(0, ("receive_smb_talloc: SMB decryption failed on "
562 "incoming packet! Error %s\n",
563 nt_errstr(status) ));
564 return status;
565 }
566 *p_encrypted = true;
567 }
568
569 /* Check the incoming SMB signature. */
570 if (!srv_check_sign_mac(xconn, *buffer, seqnum, trusted_channel)) {
571 DEBUG(0, ("receive_smb: SMB Signature verification failed on "
572 "incoming packet!\n"));
573 return NT_STATUS_INVALID_NETWORK_RESPONSE;
574 }
575
576 *p_len = len;
577 return NT_STATUS_OK;
578 }
579
580 /*
581 * Initialize a struct smb_request from an inbuf
582 */
583
584 static bool init_smb_request(struct smb_request *req,
585 struct smbd_server_connection *sconn,
586 struct smbXsrv_connection *xconn,
587 const uint8_t *inbuf,
588 size_t unread_bytes, bool encrypted,
589 uint32_t seqnum)
590 {
591 struct smbXsrv_tcon *tcon;
592 NTSTATUS status;
593 NTTIME now;
594 size_t req_size = smb_len(inbuf) + 4;
595
596 /* Ensure we have at least smb_size bytes. */
597 if (req_size < smb_size) {
598 DEBUG(0,("init_smb_request: invalid request size %u\n",
599 (unsigned int)req_size ));
600 return false;
601 }
602
603 req->request_time = timeval_current();
604 now = timeval_to_nttime(&req->request_time);
605
606 req->cmd = CVAL(inbuf, smb_com);
607 req->flags2 = SVAL(inbuf, smb_flg2);
608 req->smbpid = SVAL(inbuf, smb_pid);
609 req->mid = (uint64_t)SVAL(inbuf, smb_mid);
610 req->seqnum = seqnum;
611 req->vuid = SVAL(inbuf, smb_uid);
612 req->tid = SVAL(inbuf, smb_tid);
613 req->wct = CVAL(inbuf, smb_wct);
614 req->vwv = (const uint16_t *)(inbuf+smb_vwv);
615 req->buflen = smb_buflen(inbuf);
616 req->buf = (const uint8_t *)smb_buf_const(inbuf);
617 req->unread_bytes = unread_bytes;
618 req->encrypted = encrypted;
619 req->sconn = sconn;
620 req->xconn = xconn;
621 req->conn = NULL;
622 if (xconn != NULL) {
623 status = smb1srv_tcon_lookup(xconn, req->tid, now, &tcon);
624 if (NT_STATUS_IS_OK(status)) {
625 req->conn = tcon->compat;
626 }
627 }
628 req->chain_fsp = NULL;
629 req->smb2req = NULL;
630 req->priv_paths = NULL;
631 req->chain = NULL;
632 smb_init_perfcount_data(&req->pcd);
633
634 /* Ensure we have at least wct words and 2 bytes of bcc. */
635 if (smb_size + req->wct*2 > req_size) {
636 DEBUG(0,("init_smb_request: invalid wct number %u (size %u)\n",
637 (unsigned int)req->wct,
638 (unsigned int)req_size));
639 return false;
640 }
641 /* Ensure bcc is correct. */
642 if (((const uint8_t *)smb_buf_const(inbuf)) + req->buflen > inbuf + req_size) {
643 DEBUG(0,("init_smb_request: invalid bcc number %u "
644 "(wct = %u, size %u)\n",
645 (unsigned int)req->buflen,
646 (unsigned int)req->wct,
647 (unsigned int)req_size));
648 return false;
649 }
650
651 req->outbuf = NULL;
652 return true;
653 }
654
655 static void process_smb(struct smbXsrv_connection *xconn,
656 uint8_t *inbuf, size_t nread, size_t unread_bytes,
657 uint32_t seqnum, bool encrypted,
658 struct smb_perfcount_data *deferred_pcd);
659
660 static void smbd_deferred_open_timer(struct tevent_context *ev,
661 struct tevent_timer *te,
662 struct timeval _tval,
663 void *private_data)
664 {
665 struct pending_message_list *msg = talloc_get_type(private_data,
666 struct pending_message_list);
667 struct smbd_server_connection *sconn = msg->sconn;
668 struct smbXsrv_connection *xconn = msg->xconn;
669 TALLOC_CTX *mem_ctx = talloc_tos();
670 uint64_t mid = (uint64_t)SVAL(msg->buf.data,smb_mid);
671 uint8_t *inbuf;
672
673 inbuf = (uint8_t *)talloc_memdup(mem_ctx, msg->buf.data,
674 msg->buf.length);
675 if (inbuf == NULL) {
676 exit_server("smbd_deferred_open_timer: talloc failed\n");
677 return;
678 }
679
680 /* We leave this message on the queue so the open code can
681 know this is a retry. */
682 DEBUG(5,("smbd_deferred_open_timer: trigger mid %llu.\n",
683 (unsigned long long)mid ));
684
685 /* Mark the message as processed so this is not
686 * re-processed in error. */
687 msg->processed = true;
688
689 process_smb(xconn, inbuf,
690 msg->buf.length, 0,
691 msg->seqnum, msg->encrypted, &msg->pcd);
692
693 /* If it's still there and was processed, remove it. */
694 msg = get_deferred_open_message_smb(sconn, mid);
695 if (msg && msg->processed) {
696 remove_deferred_open_message_smb(xconn, mid);
697 }
698 }
699
700 /****************************************************************************
701 Function to push a message onto the tail of a linked list of smb messages ready
702 for processing.
703 ****************************************************************************/
704
705 static bool push_queued_message(struct smb_request *req,
706 struct timeval request_time,
707 struct timeval end_time,
708 struct deferred_open_record *open_rec)
709 {
710 int msg_len = smb_len(req->inbuf) + 4;
711 struct pending_message_list *msg;
712
713 msg = talloc_zero(NULL, struct pending_message_list);
714
715 if(msg == NULL) {
716 DEBUG(0,("push_message: malloc fail (1)\n"));
717 return False;
718 }
719 msg->sconn = req->sconn;
720 msg->xconn = req->xconn;
721
722 msg->buf = data_blob_talloc(msg, req->inbuf, msg_len);
723 if(msg->buf.data == NULL) {
724 DEBUG(0,("push_message: malloc fail (2)\n"));
725 TALLOC_FREE(msg);
726 return False;
727 }
728
729 msg->request_time = request_time;
730 msg->seqnum = req->seqnum;
731 msg->encrypted = req->encrypted;
732 msg->processed = false;
733 SMB_PERFCOUNT_DEFER_OP(&req->pcd, &msg->pcd);
734
735 if (open_rec) {
736 msg->open_rec = talloc_move(msg, &open_rec);
737 }
738
739 #if 0
740 msg->te = tevent_add_timer(msg->sconn->ev_ctx,
741 msg,
742 end_time,
743 smbd_deferred_open_timer,
744 msg);
745 if (!msg->te) {
746 DEBUG(0,("push_message: event_add_timed failed\n"));
747 TALLOC_FREE(msg);
748 return false;
749 }
750 #endif
751
752 DLIST_ADD_END(req->sconn->deferred_open_queue, msg,
753 struct pending_message_list *);
754
755 DEBUG(10,("push_message: pushed message length %u on "
756 "deferred_open_queue\n", (unsigned int)msg_len));
757
758 return True;
759 }
760
761 /****************************************************************************
762 Function to delete a sharing violation open message by mid.
763 ****************************************************************************/
764
765 void remove_deferred_open_message_smb(struct smbXsrv_connection *xconn,
766 uint64_t mid)
767 {
768 struct smbd_server_connection *sconn = xconn->client->sconn;
769 struct pending_message_list *pml;
770
771 if (sconn->using_smb2) {
772 remove_deferred_open_message_smb2(xconn, mid);
773 return;
774 }
775
776 for (pml = sconn->deferred_open_queue; pml; pml = pml->next) {
777 if (mid == (uint64_t)SVAL(pml->buf.data,smb_mid)) {
778 DEBUG(10,("remove_deferred_open_message_smb: "
779 "deleting mid %llu len %u\n",
780 (unsigned long long)mid,
781 (unsigned int)pml->buf.length ));
782 DLIST_REMOVE(sconn->deferred_open_queue, pml);
783 TALLOC_FREE(pml);
784 return;
785 }
786 }
787 }
788
789 /****************************************************************************
790 Move a sharing violation open retry message to the front of the list and
791 schedule it for immediate processing.
792 ****************************************************************************/
793
794 bool schedule_deferred_open_message_smb(struct smbXsrv_connection *xconn,
795 uint64_t mid)
796 {
797 struct smbd_server_connection *sconn = xconn->client->sconn;
798 struct pending_message_list *pml;
799 int i = 0;
800
801 if (sconn->using_smb2) {
802 return schedule_deferred_open_message_smb2(xconn, mid);
803 }
804
805 for (pml = sconn->deferred_open_queue; pml; pml = pml->next) {
806 uint64_t msg_mid = (uint64_t)SVAL(pml->buf.data,smb_mid);
807
808 DEBUG(10,("schedule_deferred_open_message_smb: [%d] "
809 "msg_mid = %llu\n",
810 i++,
811 (unsigned long long)msg_mid ));
812
813 if (mid == msg_mid) {
814 struct tevent_timer *te;
815
816 if (pml->processed) {
817 /* A processed message should not be
818 * rescheduled. */
819 DEBUG(0,("schedule_deferred_open_message_smb: LOGIC ERROR "
820 "message mid %llu was already processed\n",
821 (unsigned long long)msg_mid ));
822 continue;
823 }
824
825 DEBUG(10,("schedule_deferred_open_message_smb: "
826 "scheduling mid %llu\n",
827 (unsigned long long)mid ));
828
829 te = tevent_add_timer(pml->sconn->ev_ctx,
830 pml,
831 timeval_zero(),
832 smbd_deferred_open_timer,
833 pml);
834 if (!te) {
835 DEBUG(10,("schedule_deferred_open_message_smb: "
836 "event_add_timed() failed, "
837 "skipping mid %llu\n",
838 (unsigned long long)msg_mid ));
839 }
840
841 TALLOC_FREE(pml->te);
842 pml->te = te;
843 DLIST_PROMOTE(sconn->deferred_open_queue, pml);
844 return true;
845 }
846 }
847
848 DEBUG(10,("schedule_deferred_open_message_smb: failed to "
849 "find message mid %llu\n",
850 (unsigned long long)mid ));
851
852 return false;
853 }
854
855 /****************************************************************************
856 Return true if this mid is on the deferred queue and was not yet processed.
857 ****************************************************************************/
858
859 bool open_was_deferred(struct smbXsrv_connection *xconn, uint64_t mid)
860 {
861 struct smbd_server_connection *sconn = xconn->client->sconn;
862 struct pending_message_list *pml;
863
864 if (sconn->using_smb2) {
865 return open_was_deferred_smb2(xconn, mid);
866 }
867
868 for (pml = sconn->deferred_open_queue; pml; pml = pml->next) {
869 if (((uint64_t)SVAL(pml->buf.data,smb_mid)) == mid && !pml->processed) {
870 return True;
871 }
872 }
873 return False;
874 }
875
876 /****************************************************************************
877 Return the message queued by this mid.
878 ****************************************************************************/
879
880 static struct pending_message_list *get_deferred_open_message_smb(
881 struct smbd_server_connection *sconn, uint64_t mid)
882 {
883 struct pending_message_list *pml;
884
885 for (pml = sconn->deferred_open_queue; pml; pml = pml->next) {
886 if (((uint64_t)SVAL(pml->buf.data,smb_mid)) == mid) {
887 return pml;
888 }
889 }
890 return NULL;
891 }
892
893 /****************************************************************************
894 Get the state data queued by this mid.
895 ****************************************************************************/
896
897 bool get_deferred_open_message_state(struct smb_request *smbreq,
898 struct timeval *p_request_time,
899 struct deferred_open_record **open_rec)
900 {
901 struct pending_message_list *pml;
902
903 if (smbreq->sconn->using_smb2) {
904 return get_deferred_open_message_state_smb2(smbreq->smb2req,
905 p_request_time,
906 open_rec);
907 }
908
909 pml = get_deferred_open_message_smb(smbreq->sconn, smbreq->mid);
910 if (!pml) {
911 return false;
912 }
913 if (p_request_time) {
914 *p_request_time = pml->request_time;
915 }
916 if (open_rec != NULL) {
917 *open_rec = pml->open_rec;
918 }
919 return true;
920 }
921
922 /****************************************************************************
923 Function to push a deferred open smb message onto a linked list of local smb
924 messages ready for processing.
925 ****************************************************************************/
926
927 bool push_deferred_open_message_smb(struct smb_request *req,
928 struct timeval request_time,
929 struct timeval timeout,
930 struct file_id id,
931 struct deferred_open_record *open_rec)
932 {
933 struct timeval end_time;
934
935 if (req->smb2req) {
936 return push_deferred_open_message_smb2(req->smb2req,
937 request_time,
938 timeout,
939 id,
940 open_rec);
941 }
942
943 if (req->unread_bytes) {
944 DEBUG(0,("push_deferred_open_message_smb: logic error ! "
945 "unread_bytes = %u\n",
946 (unsigned int)req->unread_bytes ));
947 smb_panic("push_deferred_open_message_smb: "
948 "logic error unread_bytes != 0" );
949 }
950
951 end_time = timeval_sum(&request_time, &timeout);
952
953 DEBUG(10,("push_deferred_open_message_smb: pushing message "
954 "len %u mid %llu timeout time [%u.%06u]\n",
955 (unsigned int) smb_len(req->inbuf)+4,
956 (unsigned long long)req->mid,
957 (unsigned int)end_time.tv_sec,
958 (unsigned int)end_time.tv_usec));
959
960 return push_queued_message(req, request_time, end_time, open_rec);
961 }
962
963 static void smbd_sig_term_handler(struct tevent_context *ev,
964 struct tevent_signal *se,
965 int signum,
966 int count,
967 void *siginfo,
968 void *private_data)
969 {
970 exit_server_cleanly("termination signal");
971 }
972
973 void smbd_setup_sig_term_handler(struct smbd_server_connection *sconn)
974 {
975 struct tevent_signal *se;
976
977 se = tevent_add_signal(sconn->ev_ctx,
978 sconn,
979 SIGTERM, 0,
980 smbd_sig_term_handler,
981 sconn);
982 if (!se) {
983 exit_server("failed to setup SIGTERM handler");
984 }
985 }
986
987 static void smbd_sig_hup_handler(struct tevent_context *ev,
988 struct tevent_signal *se,
989 int signum,
990 int count,
991 void *siginfo,
992 void *private_data)
993 {
994 struct smbd_server_connection *sconn =
995 talloc_get_type_abort(private_data,
996 struct smbd_server_connection);
997
998 change_to_root_user();
999 DEBUG(1,("Reloading services after SIGHUP\n"));
1000 reload_services(sconn, conn_snum_used, false);
1001 }
1002
1003 void smbd_setup_sig_hup_handler(struct smbd_server_connection *sconn)
1004 {
1005 struct tevent_signal *se;
1006
1007 se = tevent_add_signal(sconn->ev_ctx,
1008 sconn,
1009 SIGHUP, 0,
1010 smbd_sig_hup_handler,
1011 sconn);
1012 if (!se) {
1013 exit_server("failed to setup SIGHUP handler");
1014 }
1015 }
1016
1017 static void smbd_conf_updated(struct messaging_context *msg,
1018 void *private_data,
1019 uint32_t msg_type,
1020 struct server_id server_id,
1021 DATA_BLOB *data)
1022 {
1023 struct smbd_server_connection *sconn =
1024 talloc_get_type_abort(private_data,
1025 struct smbd_server_connection);
1026
1027 DEBUG(10,("smbd_conf_updated: Got message saying smb.conf was "
1028 "updated. Reloading.\n"));
1029 change_to_root_user();
1030 reload_services(sconn, conn_snum_used, false);
1031 }
1032
1033 /*
1034 * Only allow 5 outstanding trans requests. We're allocating memory, so
1035 * prevent a DoS.
1036 */
1037
1038 NTSTATUS allow_new_trans(struct trans_state *list, uint64_t mid)
1039 {
1040 int count = 0;
1041 for (; list != NULL; list = list->next) {
1042
1043 if (list->mid == mid) {
1044 return NT_STATUS_INVALID_PARAMETER;
1045 }
1046
1047 count += 1;
1048 }
1049 if (count > 5) {
1050 return NT_STATUS_INSUFFICIENT_RESOURCES;
1051 }
1052
1053 return NT_STATUS_OK;
1054 }
1055
1056 /*
1057 These flags determine some of the permissions required to do an operation
1058
1059 Note that I don't set NEED_WRITE on some write operations because they
1060 are used by some brain-dead clients when printing, and I don't want to
1061 force write permissions on print services.
1062 */
1063 #define AS_USER (1<<0)
1064 #define NEED_WRITE (1<<1) /* Must be paired with AS_USER */
1065 #define TIME_INIT (1<<2)
1066 #define CAN_IPC (1<<3) /* Must be paired with AS_USER */
1067 #define AS_GUEST (1<<5) /* Must *NOT* be paired with AS_USER */
1068 #define DO_CHDIR (1<<6)
1069
1070 /*
1071 define a list of possible SMB messages and their corresponding
1072 functions. Any message that has a NULL function is unimplemented -
1073 please feel free to contribute implementations!
1074 */
1075 static const struct smb_message_struct {
1076 const char *name;
1077 void (*fn)(struct smb_request *req);
1078 int flags;
1079 } smb_messages[256] = {
1080
1081 /* 0x00 */ { "SMBmkdir",reply_mkdir,AS_USER | NEED_WRITE},
1082 /* 0x01 */ { "SMBrmdir",reply_rmdir,AS_USER | NEED_WRITE},
1083 /* 0x02 */ { "SMBopen",reply_open,AS_USER },
1084 /* 0x03 */ { "SMBcreate",reply_mknew,AS_USER},
1085 /* 0x04 */ { "SMBclose",reply_close,AS_USER | CAN_IPC },
1086 /* 0x05 */ { "SMBflush",reply_flush,AS_USER},
1087 /* 0x06 */ { "SMBunlink",reply_unlink,AS_USER | NEED_WRITE },
1088 /* 0x07 */ { "SMBmv",reply_mv,AS_USER | NEED_WRITE },
1089 /* 0x08 */ { "SMBgetatr",reply_getatr,AS_USER},
1090 /* 0x09 */ { "SMBsetatr",reply_setatr,AS_USER | NEED_WRITE},
1091 /* 0x0a */ { "SMBread",reply_read,AS_USER},
1092 /* 0x0b */ { "SMBwrite",reply_write,AS_USER | CAN_IPC },
1093 /* 0x0c */ { "SMBlock",reply_lock,AS_USER},
1094 /* 0x0d */ { "SMBunlock",reply_unlock,AS_USER},
1095 /* 0x0e */ { "SMBctemp",reply_ctemp,AS_USER },
1096 /* 0x0f */ { "SMBmknew",reply_mknew,AS_USER},
1097 /* 0x10 */ { "SMBcheckpath",reply_checkpath,AS_USER},
1098 /* 0x11 */ { "SMBexit",reply_exit,DO_CHDIR},
1099 /* 0x12 */ { "SMBlseek",reply_lseek,AS_USER},
1100 /* 0x13 */ { "SMBlockread",reply_lockread,AS_USER},
1101 /* 0x14 */ { "SMBwriteunlock",reply_writeunlock,AS_USER},
1102 /* 0x15 */ { NULL, NULL, 0 },
1103 /* 0x16 */ { NULL, NULL, 0 },
1104 /* 0x17 */ { NULL, NULL, 0 },
1105 /* 0x18 */ { NULL, NULL, 0 },
1106 /* 0x19 */ { NULL, NULL, 0 },
1107 /* 0x1a */ { "SMBreadbraw",reply_readbraw,AS_USER},
1108 /* 0x1b */ { "SMBreadBmpx",reply_readbmpx,AS_USER},
1109 /* 0x1c */ { "SMBreadBs",reply_readbs,AS_USER },
1110 /* 0x1d */ { "SMBwritebraw",reply_writebraw,AS_USER},
1111 /* 0x1e */ { "SMBwriteBmpx",reply_writebmpx,AS_USER},
1112 /* 0x1f */ { "SMBwriteBs",reply_writebs,AS_USER},
1113 /* 0x20 */ { "SMBwritec", NULL,0},
1114 /* 0x21 */ { NULL, NULL, 0 },
1115 /* 0x22 */ { "SMBsetattrE",reply_setattrE,AS_USER | NEED_WRITE },
1116 /* 0x23 */ { "SMBgetattrE",reply_getattrE,AS_USER },
1117 /* 0x24 */ { "SMBlockingX",reply_lockingX,AS_USER },
1118 /* 0x25 */ { "SMBtrans",reply_trans,AS_USER | CAN_IPC },
1119 /* 0x26 */ { "SMBtranss",reply_transs,AS_USER | CAN_IPC},
1120 /* 0x27 */ { "SMBioctl",reply_ioctl,0},
1121 /* 0x28 */ { "SMBioctls", NULL,AS_USER},
1122 /* 0x29 */ { "SMBcopy",reply_copy,AS_USER | NEED_WRITE },
1123 /* 0x2a */ { "SMBmove", NULL,AS_USER | NEED_WRITE },
1124 /* 0x2b */ { "SMBecho",reply_echo,0},
1125 /* 0x2c */ { "SMBwriteclose",reply_writeclose,AS_USER},
1126 /* 0x2d */ { "SMBopenX",reply_open_and_X,AS_USER | CAN_IPC },
1127 /* 0x2e */ { "SMBreadX",reply_read_and_X,AS_USER | CAN_IPC },
1128 /* 0x2f */ { "SMBwriteX",reply_write_and_X,AS_USER | CAN_IPC },
1129 /* 0x30 */ { NULL, NULL, 0 },
1130 /* 0x31 */ { NULL, NULL, 0 },
1131 /* 0x32 */ { "SMBtrans2",reply_trans2, AS_USER | CAN_IPC },
1132 /* 0x33 */ { "SMBtranss2",reply_transs2, AS_USER | CAN_IPC },
1133 /* 0x34 */ { "SMBfindclose",reply_findclose,AS_USER},
1134 /* 0x35 */ { "SMBfindnclose",reply_findnclose,AS_USER},
1135 /* 0x36 */ { NULL, NULL, 0 },
1136 /* 0x37 */ { NULL, NULL, 0 },
1137 /* 0x38 */ { NULL, NULL, 0 },
1138 /* 0x39 */ { NULL, NULL, 0 },
1139 /* 0x3a */ { NULL, NULL, 0 },
1140 /* 0x3b */ { NULL, NULL, 0 },
1141 /* 0x3c */ { NULL, NULL, 0 },
1142 /* 0x3d */ { NULL, NULL, 0 },
1143 /* 0x3e */ { NULL, NULL, 0 },
1144 /* 0x3f */ { NULL, NULL, 0 },
1145 /* 0x40 */ { NULL, NULL, 0 },
1146 /* 0x41 */ { NULL, NULL, 0 },
1147 /* 0x42 */ { NULL, NULL, 0 },
1148 /* 0x43 */ { NULL, NULL, 0 },
1149 /* 0x44 */ { NULL, NULL, 0 },
1150 /* 0x45 */ { NULL, NULL, 0 },
1151 /* 0x46 */ { NULL, NULL, 0 },
1152 /* 0x47 */ { NULL, NULL, 0 },
1153 /* 0x48 */ { NULL, NULL, 0 },
1154 /* 0x49 */ { NULL, NULL, 0 },
1155 /* 0x4a */ { NULL, NULL, 0 },
1156 /* 0x4b */ { NULL, NULL, 0 },
1157 /* 0x4c */ { NULL, NULL, 0 },
1158 /* 0x4d */ { NULL, NULL, 0 },
1159 /* 0x4e */ { NULL, NULL, 0 },
1160 /* 0x4f */ { NULL, NULL, 0 },
1161 /* 0x50 */ { NULL, NULL, 0 },
1162 /* 0x51 */ { NULL, NULL, 0 },
1163 /* 0x52 */ { NULL, NULL, 0 },
1164 /* 0x53 */ { NULL, NULL, 0 },
1165 /* 0x54 */ { NULL, NULL, 0 },
1166 /* 0x55 */ { NULL, NULL, 0 },
1167 /* 0x56 */ { NULL, NULL, 0 },
1168 /* 0x57 */ { NULL, NULL, 0 },
1169 /* 0x58 */ { NULL, NULL, 0 },
1170 /* 0x59 */ { NULL, NULL, 0 },
1171 /* 0x5a */ { NULL, NULL, 0 },
1172 /* 0x5b */ { NULL, NULL, 0 },
1173 /* 0x5c */ { NULL, NULL, 0 },
1174 /* 0x5d */ { NULL, NULL, 0 },
1175 /* 0x5e */ { NULL, NULL, 0 },
1176 /* 0x5f */ { NULL, NULL, 0 },
1177 /* 0x60 */ { NULL, NULL, 0 },
1178 /* 0x61 */ { NULL, NULL, 0 },
1179 /* 0x62 */ { NULL, NULL, 0 },
1180 /* 0x63 */ { NULL, NULL, 0 },
1181 /* 0x64 */ { NULL, NULL, 0 },
1182 /* 0x65 */ { NULL, NULL, 0 },
1183 /* 0x66 */ { NULL, NULL, 0 },
1184 /* 0x67 */ { NULL, NULL, 0 },
1185 /* 0x68 */ { NULL, NULL, 0 },
1186 /* 0x69 */ { NULL, NULL, 0 },
1187 /* 0x6a */ { NULL, NULL, 0 },
1188 /* 0x6b */ { NULL, NULL, 0 },
1189 /* 0x6c */ { NULL, NULL, 0 },
1190 /* 0x6d */ { NULL, NULL, 0 },
1191 /* 0x6e */ { NULL, NULL, 0 },
1192 /* 0x6f */ { NULL, NULL, 0 },
1193 /* 0x70 */ { "SMBtcon",reply_tcon,0},
1194 /* 0x71 */ { "SMBtdis",reply_tdis,DO_CHDIR},
1195 /* 0x72 */ { "SMBnegprot",reply_negprot,0},
1196 /* 0x73 */ { "SMBsesssetupX",reply_sesssetup_and_X,0},
1197 /* 0x74 */ { "SMBulogoffX",reply_ulogoffX, 0}, /* ulogoff doesn't give a valid TID */
1198 /* 0x75 */ { "SMBtconX",reply_tcon_and_X,0},
1199 /* 0x76 */ { NULL, NULL, 0 },
1200 /* 0x77 */ { NULL, NULL, 0 },
1201 /* 0x78 */ { NULL, NULL, 0 },
1202 /* 0x79 */ { NULL, NULL, 0 },
1203 /* 0x7a */ { NULL, NULL, 0 },
1204 /* 0x7b */ { NULL, NULL, 0 },
1205 /* 0x7c */ { NULL, NULL, 0 },
1206 /* 0x7d */ { NULL, NULL, 0 },
1207 /* 0x7e */ { NULL, NULL, 0 },
1208 /* 0x7f */ { NULL, NULL, 0 },
1209 /* 0x80 */ { "SMBdskattr",reply_dskattr,AS_USER},
1210 /* 0x81 */ { "SMBsearch",reply_search,AS_USER},
1211 /* 0x82 */ { "SMBffirst",reply_search,AS_USER},
1212 /* 0x83 */ { "SMBfunique",reply_search,AS_USER},
1213 /* 0x84 */ { "SMBfclose",reply_fclose,AS_USER},
1214 /* 0x85 */ { NULL, NULL, 0 },
1215 /* 0x86 */ { NULL, NULL, 0 },
1216 /* 0x87 */ { NULL, NULL, 0 },
1217 /* 0x88 */ { NULL, NULL, 0 },
1218 /* 0x89 */ { NULL, NULL, 0 },
1219 /* 0x8a */ { NULL, NULL, 0 },
1220 /* 0x8b */ { NULL, NULL, 0 },
1221 /* 0x8c */ { NULL, NULL, 0 },
1222 /* 0x8d */ { NULL, NULL, 0 },
1223 /* 0x8e */ { NULL, NULL, 0 },
1224 /* 0x8f */ { NULL, NULL, 0 },
1225 /* 0x90 */ { NULL, NULL, 0 },
1226 /* 0x91 */ { NULL, NULL, 0 },
1227 /* 0x92 */ { NULL, NULL, 0 },
1228 /* 0x93 */ { NULL, NULL, 0 },
1229 /* 0x94 */ { NULL, NULL, 0 },
1230 /* 0x95 */ { NULL, NULL, 0 },
1231 /* 0x96 */ { NULL, NULL, 0 },
1232 /* 0x97 */ { NULL, NULL, 0 },
1233 /* 0x98 */ { NULL, NULL, 0 },
1234 /* 0x99 */ { NULL, NULL, 0 },
1235 /* 0x9a */ { NULL, NULL, 0 },
1236 /* 0x9b */ { NULL, NULL, 0 },
1237 /* 0x9c */ { NULL, NULL, 0 },
1238 /* 0x9d */ { NULL, NULL, 0 },
1239 /* 0x9e */ { NULL, NULL, 0 },
1240 /* 0x9f */ { NULL, NULL, 0 },
1241 /* 0xa0 */ { "SMBnttrans",reply_nttrans, AS_USER | CAN_IPC },
1242 /* 0xa1 */ { "SMBnttranss",reply_nttranss, AS_USER | CAN_IPC },
1243 /* 0xa2 */ { "SMBntcreateX",reply_ntcreate_and_X, AS_USER | CAN_IPC },
1244 /* 0xa3 */ { NULL, NULL, 0 },
1245 /* 0xa4 */ { "SMBntcancel",reply_ntcancel, 0 },
1246 /* 0xa5 */ { "SMBntrename",reply_ntrename, AS_USER | NEED_WRITE },
1247 /* 0xa6 */ { NULL, NULL, 0 },
1248 /* 0xa7 */ { NULL, NULL, 0 },
1249 /* 0xa8 */ { NULL, NULL, 0 },
1250 /* 0xa9 */ { NULL, NULL, 0 },
1251 /* 0xaa */ { NULL, NULL, 0 },
1252 /* 0xab */ { NULL, NULL, 0 },
1253 /* 0xac */ { NULL, NULL, 0 },
1254 /* 0xad */ { NULL, NULL, 0 },
1255 /* 0xae */ { NULL, NULL, 0 },
1256 /* 0xaf */ { NULL, NULL, 0 },
1257 /* 0xb0 */ { NULL, NULL, 0 },
1258 /* 0xb1 */ { NULL, NULL, 0 },
1259 /* 0xb2 */ { NULL, NULL, 0 },
1260 /* 0xb3 */ { NULL, NULL, 0 },
1261 /* 0xb4 */ { NULL, NULL, 0 },
1262 /* 0xb5 */ { NULL, NULL, 0 },
1263 /* 0xb6 */ { NULL, NULL, 0 },
1264 /* 0xb7 */ { NULL, NULL, 0 },
1265 /* 0xb8 */ { NULL, NULL, 0 },
1266 /* 0xb9 */ { NULL, NULL, 0 },
1267 /* 0xba */ { NULL, NULL, 0 },
1268 /* 0xbb */ { NULL, NULL, 0 },
1269 /* 0xbc */ { NULL, NULL, 0 },
1270 /* 0xbd */ { NULL, NULL, 0 },
1271 /* 0xbe */ { NULL, NULL, 0 },
1272 /* 0xbf */ { NULL, NULL, 0 },
1273 /* 0xc0 */ { "SMBsplopen",reply_printopen,AS_USER},
1274 /* 0xc1 */ { "SMBsplwr",reply_printwrite,AS_USER},
1275 /* 0xc2 */ { "SMBsplclose",reply_printclose,AS_USER},
1276 /* 0xc3 */ { "SMBsplretq",reply_printqueue,AS_USER},
1277 /* 0xc4 */ { NULL, NULL, 0 },
1278 /* 0xc5 */ { NULL, NULL, 0 },
1279 /* 0xc6 */ { NULL, NULL, 0 },
1280 /* 0xc7 */ { NULL, NULL, 0 },
1281 /* 0xc8 */ { NULL, NULL, 0 },
1282 /* 0xc9 */ { NULL, NULL, 0 },
1283 /* 0xca */ { NULL, NULL, 0 },
1284 /* 0xcb */ { NULL, NULL, 0 },
1285 /* 0xcc */ { NULL, NULL, 0 },
1286 /* 0xcd */ { NULL, NULL, 0 },
1287 /* 0xce */ { NULL, NULL, 0 },
1288 /* 0xcf */ { NULL, NULL, 0 },
1289 /* 0xd0 */ { "SMBsends",reply_sends,AS_GUEST},
1290 /* 0xd1 */ { "SMBsendb", NULL,AS_GUEST},
1291 /* 0xd2 */ { "SMBfwdname", NULL,AS_GUEST},
1292 /* 0xd3 */ { "SMBcancelf", NULL,AS_GUEST},
1293 /* 0xd4 */ { "SMBgetmac", NULL,AS_GUEST},
1294 /* 0xd5 */ { "SMBsendstrt",reply_sendstrt,AS_GUEST},
1295 /* 0xd6 */ { "SMBsendend",reply_sendend,AS_GUEST},
1296 /* 0xd7 */ { "SMBsendtxt",reply_sendtxt,AS_GUEST},
1297 /* 0xd8 */ { NULL, NULL, 0 },
1298 /* 0xd9 */ { NULL, NULL, 0 },
1299 /* 0xda */ { NULL, NULL, 0 },
1300 /* 0xdb */ { NULL, NULL, 0 },
1301 /* 0xdc */ { NULL, NULL, 0 },
1302 /* 0xdd */ { NULL, NULL, 0 },
1303 /* 0xde */ { NULL, NULL, 0 },
1304 /* 0xdf */ { NULL, NULL, 0 },
1305 /* 0xe0 */ { NULL, NULL, 0 },
1306 /* 0xe1 */ { NULL, NULL, 0 },
1307 /* 0xe2 */ { NULL, NULL, 0 },
1308 /* 0xe3 */ { NULL, NULL, 0 },
1309 /* 0xe4 */ { NULL, NULL, 0 },
1310 /* 0xe5 */ { NULL, NULL, 0 },
1311 /* 0xe6 */ { NULL, NULL, 0 },
1312 /* 0xe7 */ { NULL, NULL, 0 },
1313 /* 0xe8 */ { NULL, NULL, 0 },
1314 /* 0xe9 */ { NULL, NULL, 0 },
1315 /* 0xea */ { NULL, NULL, 0 },
1316 /* 0xeb */ { NULL, NULL, 0 },
1317 /* 0xec */ { NULL, NULL, 0 },
1318 /* 0xed */ { NULL, NULL, 0 },
1319 /* 0xee */ { NULL, NULL, 0 },
1320 /* 0xef */ { NULL, NULL, 0 },
1321 /* 0xf0 */ { NULL, NULL, 0 },
1322 /* 0xf1 */ { NULL, NULL, 0 },
1323 /* 0xf2 */ { NULL, NULL, 0 },
1324 /* 0xf3 */ { NULL, NULL, 0 },
1325 /* 0xf4 */ { NULL, NULL, 0 },
1326 /* 0xf5 */ { NULL, NULL, 0 },
1327 /* 0xf6 */ { NULL, NULL, 0 },
1328 /* 0xf7 */ { NULL, NULL, 0 },
1329 /* 0xf8 */ { NULL, NULL, 0 },
1330 /* 0xf9 */ { NULL, NULL, 0 },
1331 /* 0xfa */ { NULL, NULL, 0 },
1332 /* 0xfb */ { NULL, NULL, 0 },
1333 /* 0xfc */ { NULL, NULL, 0 },
1334 /* 0xfd */ { NULL, NULL, 0 },
1335 /* 0xfe */ { NULL, NULL, 0 },
1336 /* 0xff */ { NULL, NULL, 0 }
1337
1338 };
1339
1340 /*******************************************************************
1341 allocate and initialize a reply packet
1342 ********************************************************************/
1343
1344 static bool create_outbuf(TALLOC_CTX *mem_ctx, struct smb_request *req,
1345 const uint8_t *inbuf, char **outbuf,
1346 uint8_t num_words, uint32_t num_bytes)
1347 {
1348 size_t smb_len = MIN_SMB_SIZE + VWV(num_words) + num_bytes;
1349
1350 /*
1351 * Protect against integer wrap.
1352 * The SMB layer reply can be up to 0xFFFFFF bytes.
1353 */
1354 if ((num_bytes > 0xffffff) || (smb_len > 0xffffff)) {
1355 char *msg;
1356 if (asprintf(&msg, "num_bytes too large: %u",
1357 (unsigned)num_bytes) == -1) {
1358 msg = discard_const_p(char, "num_bytes too large");
1359 }
1360 smb_panic(msg);
1361 }
1362
1363 /*
1364 * Here we include the NBT header for now.
1365 */
1366 *outbuf = talloc_array(mem_ctx, char,
1367 NBT_HDR_SIZE + smb_len);
1368 if (*outbuf == NULL) {
1369 return false;
1370 }
1371
1372 construct_reply_common(req->cmd, inbuf, *outbuf);
1373 srv_set_message(*outbuf, num_words, num_bytes, false);
1374 /*
1375 * Zero out the word area, the caller has to take care of the bcc area
1376 * himself
1377 */
1378 if (num_words != 0) {
1379 memset(*outbuf + (NBT_HDR_SIZE + HDR_VWV), 0, VWV(num_words));
1380 }
1381
1382 return true;
1383 }
1384
1385 void reply_outbuf(struct smb_request *req, uint8_t num_words, uint32_t num_bytes)
1386 {
1387 char *outbuf;
1388 if (!create_outbuf(req, req, req->inbuf, &outbuf, num_words,
1389 num_bytes)) {
1390 smb_panic("could not allocate output buffer\n");
1391 }
1392 req->outbuf = (uint8_t *)outbuf;
1393 }
1394
1395
1396 /*******************************************************************
1397 Dump a packet to a file.
1398 ********************************************************************/
1399
1400 static void smb_dump(const char *name, int type, const char *data)
1401 {
1402 size_t len;
1403 int fd, i;
1404 char *fname = NULL;
1405 if (DEBUGLEVEL < 50) {
1406 return;
1407 }
1408
1409 len = smb_len_tcp(data)+4;
1410 for (i=1;i<100;i++) {
1411 fname = talloc_asprintf(talloc_tos(),
1412 "/tmp/%s.%d.%s",
1413 name,
1414 i,
1415 type ? "req" : "resp");
1416 if (fname == NULL) {
1417 return;
1418 }
1419 fd = open(fname, O_WRONLY|O_CREAT|O_EXCL, 0644);
1420 if (fd != -1 || errno != EEXIST) break;
1421 TALLOC_FREE(fname);
1422 }
1423 if (fd != -1) {
1424 ssize_t ret = write(fd, data, len);
1425 if (ret != len)
1426 DEBUG(0,("smb_dump: problem: write returned %d\n", (int)ret ));
1427 close(fd);
1428 DEBUG(0,("created %s len %lu\n", fname, (unsigned long)len));
1429 }
1430 TALLOC_FREE(fname);
1431 }
1432
1433 /****************************************************************************
1434 Prepare everything for calling the actual request function, and potentially
1435 call the request function via the "new" interface.
1436
1437 Return False if the "legacy" function needs to be called, everything is
1438 prepared.
1439
1440 Return True if we're done.
1441
1442 I know this API sucks, but it is the one with the least code change I could
1443 find.
1444 ****************************************************************************/
1445
1446 static connection_struct *switch_message(uint8_t type, struct smb_request *req)
1447 {
1448 int flags;
1449 uint64_t session_tag;
1450 connection_struct *conn = NULL;
1451 struct smbXsrv_connection *xconn = req->xconn;
1452 NTTIME now = timeval_to_nttime(&req->request_time);
1453 struct smbXsrv_session *session = NULL;
1454 NTSTATUS status;
1455
1456 errno = 0;
1457
1458 if (!xconn->smb1.negprot.done) {
1459 switch (type) {
1460 /*
1461 * Without a negprot the request must
1462 * either be a negprot, or one of the
1463 * evil old SMB mailslot messaging types.
1464 */
1465 case SMBnegprot:
1466 case SMBsendstrt:
1467 case SMBsendend:
1468 case SMBsendtxt:
1469 break;
1470 default:
1471 exit_server_cleanly("The first request "
1472 "should be a negprot");
1473 }
1474 }
1475
1476 if (smb_messages[type].fn == NULL) {
1477 DEBUG(0,("Unknown message type %d!\n",type));
1478 smb_dump("Unknown", 1, (const char *)req->inbuf);
1479 reply_unknown_new(req, type);
1480 return NULL;
1481 }
1482
1483 flags = smb_messages[type].flags;
1484
1485 /* In share mode security we must ignore the vuid. */
1486 session_tag = req->vuid;
1487 conn = req->conn;
1488
1489 DEBUG(3,("switch message %s (pid %d) conn 0x%lx\n", smb_fn_name(type),
1490 (int)getpid(), (unsigned long)conn));
1491
1492 smb_dump(smb_fn_name(type), 1, (const char *)req->inbuf);
1493
1494 /* Ensure this value is replaced in the incoming packet. */
1495 SSVAL(discard_const_p(uint8_t, req->inbuf),smb_uid,session_tag);
1496
1497 /*
1498 * Ensure the correct username is in current_user_info. This is a
1499 * really ugly bugfix for problems with multiple session_setup_and_X's
1500 * being done and allowing %U and %G substitutions to work correctly.
1501 * There is a reason this code is done here, don't move it unless you
1502 * know what you're doing... :-).
1503 * JRA.
1504 */
1505
1506 /*
1507 * lookup an existing session
1508 *
1509 * Note: for now we only check for NT_STATUS_NETWORK_SESSION_EXPIRED
1510 * here, the main check is still in change_to_user()
1511 */
1512 status = smb1srv_session_lookup(xconn,
1513 session_tag,
1514 now,
1515 &session);
1516 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED)) {
1517 switch (type) {
1518 case SMBsesssetupX:
1519 status = NT_STATUS_OK;
1520 break;
1521 default:
1522 DEBUG(1,("Error: session %llu is expired, mid=%llu.\n",
1523 (unsigned long long)session_tag,
1524 (unsigned long long)req->mid));
1525 reply_nterror(req, NT_STATUS_NETWORK_SESSION_EXPIRED);
1526 return conn;
1527 }
1528 }
1529
1530 if (session_tag != xconn->client->last_session_id) {
1531 struct user_struct *vuser = NULL;
1532
1533 xconn->client->last_session_id = session_tag;
1534 if (session) {
1535 vuser = session->compat;
1536 }
1537 if (vuser) {
1538 set_current_user_info(
1539 vuser->session_info->unix_info->sanitized_username,
1540 vuser->session_info->unix_info->unix_name,
1541 vuser->session_info->info->domain_name);
1542 }
1543 }
1544
1545 /* Does this call need to be run as the connected user? */
1546 if (flags & AS_USER) {
1547
1548 /* Does this call need a valid tree connection? */
1549 if (!conn) {
1550 /*
1551 * Amazingly, the error code depends on the command
1552 * (from Samba4).
1553 */
1554 if (type == SMBntcreateX) {
1555 reply_nterror(req, NT_STATUS_INVALID_HANDLE);
1556 } else {
1557 reply_nterror(req, NT_STATUS_NETWORK_NAME_DELETED);
1558 }
1559 return NULL;
1560 }
1561
1562 if (!change_to_user(conn,session_tag)) {
1563 DEBUG(0, ("Error: Could not change to user. Removing "
1564 "deferred open, mid=%llu.\n",
1565 (unsigned long long)req->mid));
1566 reply_force_doserror(req, ERRSRV, ERRbaduid);
1567 return conn;
1568 }
1569
1570 /* All NEED_WRITE and CAN_IPC flags must also have AS_USER. */
1571
1572 /* Does it need write permission? */
1573 if ((flags & NEED_WRITE) && !CAN_WRITE(conn)) {
1574 reply_nterror(req, NT_STATUS_MEDIA_WRITE_PROTECTED);
1575 return conn;
1576 }
1577
1578 /* IPC services are limited */
1579 if (IS_IPC(conn) && !(flags & CAN_IPC)) {
1580 reply_nterror(req, NT_STATUS_ACCESS_DENIED);
1581 return conn;
1582 }
1583 } else {
1584 /* This call needs to be run as root */
1585 change_to_root_user();
1586 }
1587
1588 /* load service specific parameters */
1589 if (conn) {
1590 if (req->encrypted) {
1591 conn->encrypted_tid = true;
1592 /* encrypted required from now on. */
1593 conn->encrypt_level = SMB_SIGNING_REQUIRED;
1594 } else if (ENCRYPTION_REQUIRED(conn)) {
1595 if (req->cmd != SMBtrans2 && req->cmd != SMBtranss2) {
1596 DEBUG(1,("service[%s] requires encryption"
1597 "%s ACCESS_DENIED. mid=%llu\n",
1598 lp_servicename(talloc_tos(), SNUM(conn)),
1599 smb_fn_name(type),
1600 (unsigned long long)req->mid));
1601 reply_nterror(req, NT_STATUS_ACCESS_DENIED);
1602 return conn;
1603 }
1604 }
1605
1606 if (!set_current_service(conn,SVAL(req->inbuf,smb_flg),
1607 (flags & (AS_USER|DO_CHDIR)
1608 ?True:False))) {
1609 reply_nterror(req, NT_STATUS_ACCESS_DENIED);
1610 return conn;
1611 }
1612 conn->num_smb_operations++;
1613 }
1614
1615 /*
1616 * Does this protocol need to be run as guest? (Only archane
1617 * messenger service requests have this...)
1618 */
1619 if (flags & AS_GUEST) {
1620 char *raddr;
1621 bool ok;
1622
1623 if (!change_to_guest()) {
1624 reply_nterror(req, NT_STATUS_ACCESS_DENIED);
1625 return conn;
1626 }
1627
1628 raddr = tsocket_address_inet_addr_string(xconn->remote_address,
1629 talloc_tos());
1630 if (raddr == NULL) {
1631 reply_nterror(req, NT_STATUS_NO_MEMORY);
1632 return conn;
1633 }
1634
1635 /*
1636 * Haven't we checked this in smbd_process already???
1637 */
1638
1639 ok = allow_access(lp_hosts_deny(-1), lp_hosts_allow(-1),
1640 xconn->remote_hostname, raddr);
1641 TALLOC_FREE(raddr);
1642
1643 if (!ok) {
1644 reply_nterror(req, NT_STATUS_ACCESS_DENIED);
1645 return conn;
1646 }
1647 }
1648
1649 smb_messages[type].fn(req);
1650 return req->conn;
1651 }
1652
1653 /****************************************************************************
1654 Construct a reply to the incoming packet.
1655 ****************************************************************************/
1656
1657 static void construct_reply(struct smbXsrv_connection *xconn,
1658 char *inbuf, int size, size_t unread_bytes,
1659 uint32_t seqnum, bool encrypted,
1660 struct smb_perfcount_data *deferred_pcd)
1661 {
1662 struct smbd_server_connection *sconn = xconn->client->sconn;
1663 struct smb_request *req;
1664
1665 if (!(req = talloc(talloc_tos(), struct smb_request))) {
1666 smb_panic("could not allocate smb_request");
1667 }
1668
1669 if (!init_smb_request(req, sconn, xconn, (uint8_t *)inbuf, unread_bytes,
1670 encrypted, seqnum)) {
1671 exit_server_cleanly("Invalid SMB request");
1672 }
1673
1674 req->inbuf = (uint8_t *)talloc_move(req, &inbuf);
1675
1676 /* we popped this message off the queue - keep original perf data */
1677 if (deferred_pcd)
1678 req->pcd = *deferred_pcd;
1679 else {
1680 SMB_PERFCOUNT_START(&req->pcd);
1681 SMB_PERFCOUNT_SET_OP(&req->pcd, req->cmd);
1682 SMB_PERFCOUNT_SET_MSGLEN_IN(&req->pcd, size);
1683 }
1684
1685 req->conn = switch_message(req->cmd, req);
1686
1687 if (req->outbuf == NULL) {
1688 /*
1689 * Request has suspended itself, will come
1690 * back here.
1691 */
1692 return;
1693 }
1694 if (CVAL(req->outbuf,0) == 0) {
1695 show_msg((char *)req->outbuf);
1696 }
1697 smb_request_done(req);
1698 }
1699
1700 static void construct_reply_chain(struct smbXsrv_connection *xconn,
1701 char *inbuf, int size, uint32_t seqnum,
1702 bool encrypted,
1703 struct smb_perfcount_data *deferred_pcd)
1704 {
1705 struct smb_request **reqs = NULL;
1706 struct smb_request *req;
1707 unsigned num_reqs;
1708 bool ok;
1709
1710 ok = smb1_parse_chain(talloc_tos(), (uint8_t *)inbuf, xconn, encrypted,
1711 seqnum, &reqs, &num_reqs);
1712 if (!ok) {
1713 char errbuf[smb_size];
1714 error_packet(errbuf, 0, 0, NT_STATUS_INVALID_PARAMETER,
1715 __LINE__, __FILE__);
1716 if (!srv_send_smb(xconn, errbuf, true, seqnum, encrypted,
1717 NULL)) {
1718 exit_server_cleanly("construct_reply_chain: "
1719 "srv_send_smb failed.");
1720 }
1721 return;
1722 }
1723
1724 req = reqs[0];
1725 req->inbuf = (uint8_t *)talloc_move(reqs, &inbuf);
1726
1727 req->conn = switch_message(req->cmd, req);
1728
1729 if (req->outbuf == NULL) {
1730 /*
1731 * Request has suspended itself, will come
1732 * back here.
1733 */
1734 return;
1735 }
1736 smb_request_done(req);
1737 }
1738
1739 /*
1740 * To be called from an async SMB handler that is potentially chained
1741 * when it is finished for shipping.
1742 */
1743
1744 void smb_request_done(struct smb_request *req)
1745 {
1746 struct smb_request **reqs = NULL;
1747 struct smb_request *first_req;
1748 size_t i, num_reqs, next_index;
1749 NTSTATUS status;
1750
1751 if (req->chain == NULL) {
1752 first_req = req;
1753 goto shipit;
1754 }
1755
1756 reqs = req->chain;
1757 num_reqs = talloc_array_length(reqs);
1758
1759 for (i=0; i<num_reqs; i++) {
1760 if (reqs[i] == req) {
1761 break;
1762 }
1763 }
1764 if (i == num_reqs) {
1765 /*
1766 * Invalid chain, should not happen
1767 */
1768 status = NT_STATUS_INTERNAL_ERROR;
1769 goto error;
1770 }
1771 next_index = i+1;
1772
1773 while ((next_index < num_reqs) && (IVAL(req->outbuf, smb_rcls) == 0)) {
1774 struct smb_request *next = reqs[next_index];
1775 struct smbXsrv_tcon *tcon;
1776 NTTIME now = timeval_to_nttime(&req->request_time);
1777
1778 next->vuid = SVAL(req->outbuf, smb_uid);
1779 next->tid = SVAL(req->outbuf, smb_tid);
1780 status = smb1srv_tcon_lookup(req->xconn, req->tid,
1781 now, &tcon);
1782 if (NT_STATUS_IS_OK(status)) {
1783 req->conn = tcon->compat;
1784 } else {
1785 req->conn = NULL;
1786 }
1787 next->chain_fsp = req->chain_fsp;
1788 next->inbuf = req->inbuf;
1789
1790 req = next;
1791 req->conn = switch_message(req->cmd, req);
1792
1793 if (req->outbuf == NULL) {
1794 /*
1795 * Request has suspended itself, will come
1796 * back here.
1797 */
1798 return;
1799 }
1800 next_index += 1;
1801 }
1802
1803 first_req = reqs[0];
1804
1805 for (i=1; i<next_index; i++) {
1806 bool ok;
1807
1808 ok = smb_splice_chain(&first_req->outbuf, reqs[i]->outbuf);
1809 if (!ok) {
1810 status = NT_STATUS_INTERNAL_ERROR;
1811 goto error;
1812 }
1813 }
1814
1815 SSVAL(first_req->outbuf, smb_uid, SVAL(req->outbuf, smb_uid));
1816 SSVAL(first_req->outbuf, smb_tid, SVAL(req->outbuf, smb_tid));
1817
1818 /*
1819 * This scary statement intends to set the
1820 * FLAGS2_32_BIT_ERROR_CODES flg2 field in first_req->outbuf
1821 * to the value last_req->outbuf carries
1822 */
1823 SSVAL(first_req->outbuf, smb_flg2,
1824 (SVAL(first_req->outbuf, smb_flg2) & ~FLAGS2_32_BIT_ERROR_CODES)
1825 |(SVAL(req->outbuf, smb_flg2) & FLAGS2_32_BIT_ERROR_CODES));
1826
1827 /*
1828 * Transfer the error codes from the subrequest to the main one
1829 */
1830 SSVAL(first_req->outbuf, smb_rcls, SVAL(req->outbuf, smb_rcls));
1831 SSVAL(first_req->outbuf, smb_err, SVAL(req->outbuf, smb_err));
1832
1833 _smb_setlen_large(
1834 first_req->outbuf, talloc_get_size(first_req->outbuf) - 4);
1835
1836 shipit:
1837 if (!srv_send_smb(first_req->xconn,
1838 (char *)first_req->outbuf,
1839 true, first_req->seqnum+1,
1840 IS_CONN_ENCRYPTED(req->conn)||first_req->encrypted,
1841 &first_req->pcd)) {
1842 exit_server_cleanly("construct_reply_chain: srv_send_smb "
1843 "failed.");
1844 }
1845 TALLOC_FREE(req); /* non-chained case */
1846 TALLOC_FREE(reqs); /* chained case */
1847 return;
1848
1849 error:
1850 {
1851 char errbuf[smb_size];
1852 error_packet(errbuf, 0, 0, status, __LINE__, __FILE__);
1853 if (!srv_send_smb(req->xconn, errbuf, true,
1854 req->seqnum+1, req->encrypted,
1855 NULL)) {
1856 exit_server_cleanly("construct_reply_chain: "
1857 "srv_send_smb failed.");
1858 }
1859 }
1860 TALLOC_FREE(req); /* non-chained case */
1861 TALLOC_FREE(reqs); /* chained case */
1862 }
1863
1864 /****************************************************************************
1865 Process an smb from the client
1866 ****************************************************************************/
1867 static void process_smb(struct smbXsrv_connection *xconn,
1868 uint8_t *inbuf, size_t nread, size_t unread_bytes,
1869 uint32_t seqnum, bool encrypted,
1870 struct smb_perfcount_data *deferred_pcd)
1871 {
1872 struct smbd_server_connection *sconn = xconn->client->sconn;
1873 int msg_type = CVAL(inbuf,0);
1874
1875 DO_PROFILE_INC(request);
1876
1877 DEBUG( 6, ( "got message type 0x%x of len 0x%x\n", msg_type,
1878 smb_len(inbuf) ) );
1879 DEBUG(3, ("Transaction %d of length %d (%u toread)\n",
1880 sconn->trans_num, (int)nread, (unsigned int)unread_bytes));
1881
1882 if (msg_type != NBSSmessage) {
1883 /*
1884 * NetBIOS session request, keepalive, etc.
1885 */
1886 reply_special(xconn, (char *)inbuf, nread);
1887 goto done;
1888 }
1889
1890 if (sconn->using_smb2) {
1891 /* At this point we're not really using smb2,
1892 * we make the decision here.. */
1893 if (smbd_is_smb2_header(inbuf, nread)) {
1894 const uint8_t *inpdu = inbuf + NBT_HDR_SIZE;
1895 size_t pdulen = nread - NBT_HDR_SIZE;
1896 smbd_smb2_first_negprot(xconn, inpdu, pdulen);
1897 return;
1898 } else if (nread >= smb_size && valid_smb_header(inbuf)
1899 && CVAL(inbuf, smb_com) != 0x72) {
1900 /* This is a non-negprot SMB1 packet.
1901 Disable SMB2 from now on. */
1902 sconn->using_smb2 = false;
1903 }
1904 }
1905
1906 /* Make sure this is an SMB packet. smb_size contains NetBIOS header
1907 * so subtract 4 from it. */
1908 if ((nread < (smb_size - 4)) || !valid_smb_header(inbuf)) {
1909 DEBUG(2,("Non-SMB packet of length %d. Terminating server\n",
1910 smb_len(inbuf)));
1911
1912 /* special magic for immediate exit */
1913 if ((nread == 9) &&
1914 (IVAL(inbuf, 4) == 0x74697865) &&
1915 lp_parm_bool(-1, "smbd", "suicide mode", false)) {
1916 uint8_t exitcode = CVAL(inbuf, 8);
1917 DEBUG(1, ("Exiting immediately with code %d\n",
1918 (int)exitcode));
1919 exit(exitcode);
1920 }
1921
1922 exit_server_cleanly("Non-SMB packet");
1923 }
1924
1925 show_msg((char *)inbuf);
1926
1927 if ((unread_bytes == 0) && smb1_is_chain(inbuf)) {
1928 construct_reply_chain(xconn, (char *)inbuf, nread,
1929 seqnum, encrypted, deferred_pcd);
1930 } else {
1931 construct_reply(xconn, (char *)inbuf, nread, unread_bytes,
1932 seqnum, encrypted, deferred_pcd);
1933 }
1934
1935 sconn->trans_num++;
1936
1937 done:
1938 sconn->num_requests++;
1939
1940 /* The timeout_processing function isn't run nearly
1941 often enough to implement 'max log size' without
1942 overrunning the size of the file by many megabytes.
1943 This is especially true if we are running at debug
1944 level 10. Checking every 50 SMBs is a nice
1945 tradeoff of performance vs log file size overrun. */
1946
1947 if ((sconn->num_requests % 50) == 0 &&
1948 need_to_check_log_size()) {
1949 change_to_root_user();
1950 check_log_size();
1951 }
1952 }
1953
1954 /****************************************************************************
1955 Return a string containing the function name of a SMB command.
1956 ****************************************************************************/
1957
1958 const char *smb_fn_name(int type)
1959 {
1960 const char *unknown_name = "SMBunknown";
1961
1962 if (smb_messages[type].name == NULL)
1963 return(unknown_name);
1964
1965 return(smb_messages[type].name);
1966 }
1967
1968 /****************************************************************************
1969 Helper functions for contruct_reply.
1970 ****************************************************************************/
1971
1972 void add_to_common_flags2(uint32_t v)
1973 {
1974 common_flags2 |= v;
1975 }
1976
1977 void remove_from_common_flags2(uint32_t v)
1978 {
1979 common_flags2 &= ~v;
1980 }
1981
1982 static void construct_reply_common(uint8_t cmd, const uint8_t *inbuf,
1983 char *outbuf)
1984 {
1985 uint16_t in_flags2 = SVAL(inbuf,smb_flg2);
1986 uint16_t out_flags2 = common_flags2;
1987
1988 out_flags2 |= in_flags2 & FLAGS2_UNICODE_STRINGS;
1989 out_flags2 |= in_flags2 & FLAGS2_SMB_SECURITY_SIGNATURES;
1990 out_flags2 |= in_flags2 & FLAGS2_SMB_SECURITY_SIGNATURES_REQUIRED;
1991
1992 srv_set_message(outbuf,0,0,false);
1993
1994 SCVAL(outbuf, smb_com, cmd);
1995 SIVAL(outbuf,smb_rcls,0);
1996 SCVAL(outbuf,smb_flg, FLAG_REPLY | (CVAL(inbuf,smb_flg) & FLAG_CASELESS_PATHNAMES));
1997 SSVAL(outbuf,smb_flg2, out_flags2);
1998 memset(outbuf+smb_pidhigh,'\0',(smb_tid-smb_pidhigh));
1999 memcpy(outbuf+smb_ss_field, inbuf+smb_ss_field, 8);
2000
2001 SSVAL(outbuf,smb_tid,SVAL(inbuf,smb_tid));
2002 SSVAL(outbuf,smb_pid,SVAL(inbuf,smb_pid));
2003 SSVAL(outbuf,smb_uid,SVAL(inbuf,smb_uid));
2004 SSVAL(outbuf,smb_mid,SVAL(inbuf,smb_mid));
2005 }
2006
2007 void construct_reply_common_req(struct smb_request *req, char *outbuf)
2008 {
2009 construct_reply_common(req->cmd, req->inbuf, outbuf);
2010 }
2011
2012 /**
2013 * @brief Find the smb_cmd offset of the last command pushed
2014 * @param[in] buf The buffer we're building up
2015 * @retval Where can we put our next andx cmd?
2016 *
2017 * While chaining requests, the "next" request we're looking at needs to put
2018 * its SMB_Command before the data the previous request already built up added
2019 * to the chain. Find the offset to the place where we have to put our cmd.
2020 */
2021
2022 static bool find_andx_cmd_ofs(uint8_t *buf, size_t *pofs)
2023 {
2024 uint8_t cmd;
2025 size_t ofs;
2026
2027 cmd = CVAL(buf, smb_com);
2028
2029 if (!is_andx_req(cmd)) {
2030 return false;
2031 }
2032
2033 ofs = smb_vwv0;
2034
2035 while (CVAL(buf, ofs) != 0xff) {
2036
2037 if (!is_andx_req(CVAL(buf, ofs))) {
2038 return false;
2039 }
2040
2041 /*
2042 * ofs is from start of smb header, so add the 4 length
2043 * bytes. The next cmd is right after the wct field.
2044 */
2045 ofs = SVAL(buf, ofs+2) + 4 + 1;
2046
2047 if (ofs+4 >= talloc_get_size(buf)) {
2048 return false;
2049 }
2050 }
2051
2052 *pofs = ofs;
2053 return true;
2054 }
2055
2056 /**
2057 * @brief Do the smb chaining at a buffer level
2058 * @param[in] poutbuf Pointer to the talloc'ed buffer to be modified
2059 * @param[in] andx_buf Buffer to be appended
2060 */
2061
2062 static bool smb_splice_chain(uint8_t **poutbuf, const uint8_t *andx_buf)
2063 {
2064 uint8_t smb_command = CVAL(andx_buf, smb_com);
2065 uint8_t wct = CVAL(andx_buf, smb_wct);
2066 const uint16_t *vwv = (const uint16_t *)(andx_buf + smb_vwv);
2067 uint32_t num_bytes = smb_buflen(andx_buf);
2068 const uint8_t *bytes = (const uint8_t *)smb_buf_const(andx_buf);
2069
2070 uint8_t *outbuf;
2071 size_t old_size, new_size;
2072 size_t ofs;
2073 size_t chain_padding = 0;
2074 size_t andx_cmd_ofs;
2075
2076
2077 old_size = talloc_get_size(*poutbuf);
2078
2079 if ((old_size % 4) != 0) {
2080 /*
2081 * Align the wct field of subsequent requests to a 4-byte
2082 * boundary
2083 */
2084 chain_padding = 4 - (old_size % 4);
2085 }
2086
2087 /*
2088 * After the old request comes the new wct field (1 byte), the vwv's
2089 * and the num_bytes field.
2090 */
2091
2092 new_size = old_size + chain_padding + 1 + wct * sizeof(uint16_t) + 2;
2093 new_size += num_bytes;
2094
2095 if ((smb_command != SMBwriteX) && (new_size > 0xffff)) {
2096 DEBUG(1, ("smb_splice_chain: %u bytes won't fit\n",
2097 (unsigned)new_size));
2098 return false;
2099 }
2100
2101 outbuf = talloc_realloc(NULL, *poutbuf, uint8_t, new_size);
2102 if (outbuf == NULL) {
2103 DEBUG(0, ("talloc failed\n"));
2104 return false;
2105 }
2106 *poutbuf = outbuf;
2107
2108 if (!find_andx_cmd_ofs(outbuf, &andx_cmd_ofs)) {
2109 DEBUG(1, ("invalid command chain\n"));
2110 *poutbuf = talloc_realloc(NULL, *poutbuf, uint8_t, old_size);
2111 return false;
2112 }
2113
2114 if (chain_padding != 0) {
2115 memset(outbuf + old_size, 0, chain_padding);
2116 old_size += chain_padding;
2117 }
2118
2119 SCVAL(outbuf, andx_cmd_ofs, smb_command);
2120 SSVAL(outbuf, andx_cmd_ofs + 2, old_size - 4);
2121
2122 ofs = old_size;
2123
2124 /*
2125 * Push the chained request:
2126 *
2127 * wct field
2128 */
2129
2130 SCVAL(outbuf, ofs, wct);
2131 ofs += 1;
2132
2133 /*
2134 * vwv array
2135 */
2136
2137 memcpy(outbuf + ofs, vwv, sizeof(uint16_t) * wct);
2138
2139 /*
2140 * HACK ALERT
2141 *
2142 * Read&X has an offset into its data buffer at
2143 * vwv[6]. reply_read_andx has no idea anymore that it's
2144 * running from within a chain, so we have to fix up the
2145 * offset here.
2146 *
2147 * Although it looks disgusting at this place, I want to keep
2148 * it here. The alternative would be to push knowledge about
2149 * the andx chain down into read&x again.
2150 */
2151
2152 if (smb_command == SMBreadX) {
2153 uint8_t *bytes_addr;
2154
2155 if (wct < 7) {
2156 /*
2157 * Invalid read&x response
2158 */
2159 return false;
2160 }
2161
2162 bytes_addr = outbuf + ofs /* vwv start */
2163 + sizeof(uint16_t) * wct /* vwv array */
2164 + sizeof(uint16_t) /* bcc */
2165 + 1; /* padding byte */
2166
2167 SSVAL(outbuf + ofs, 6 * sizeof(uint16_t),
2168 bytes_addr - outbuf - 4);
2169 }
2170
2171 ofs += sizeof(uint16_t) * wct;
2172
2173 /*
2174 * bcc (byte count)
2175 */
2176
2177 SSVAL(outbuf, ofs, num_bytes);
2178 ofs += sizeof(uint16_t);
2179
2180 /*
2181 * The bytes field
2182 */
2183
2184 memcpy(outbuf + ofs, bytes, num_bytes);
2185
2186 return true;
2187 }
2188
2189 bool smb1_is_chain(const uint8_t *buf)
2190 {
2191 uint8_t cmd, wct, andx_cmd;
2192
2193 cmd = CVAL(buf, smb_com);
2194 if (!is_andx_req(cmd)) {
2195 return false;
2196 }
2197 wct = CVAL(buf, smb_wct);
2198 if (wct < 2) {
2199 return false;
2200 }
2201 andx_cmd = CVAL(buf, smb_vwv);
2202 return (andx_cmd != 0xFF);
2203 }
2204
2205 bool smb1_walk_chain(const uint8_t *buf,
2206 bool (*fn)(uint8_t cmd,
2207 uint8_t wct, const uint16_t *vwv,
2208 uint16_t num_bytes, const uint8_t *bytes,
2209 void *private_data),
2210 void *private_data)
2211 {
2212 size_t smblen = smb_len(buf);
2213 const char *smb_buf = smb_base(buf);
2214 uint8_t cmd, chain_cmd;
2215 uint8_t wct;
2216 const uint16_t *vwv;
2217 uint16_t num_bytes;
2218 const uint8_t *bytes;
2219
2220 cmd = CVAL(buf, smb_com);
2221 wct = CVAL(buf, smb_wct);
2222 vwv = (const uint16_t *)(buf + smb_vwv);
2223 num_bytes = smb_buflen(buf);
2224 bytes = (const uint8_t *)smb_buf_const(buf);
2225
2226 if (!fn(cmd, wct, vwv, num_bytes, bytes, private_data)) {
2227 return false;
2228 }
2229
2230 if (!is_andx_req(cmd)) {
2231 return true;
2232 }
2233 if (wct < 2) {
2234 return false;
2235 }
2236
2237 chain_cmd = CVAL(vwv, 0);
2238
2239 while (chain_cmd != 0xff) {
2240 uint32_t chain_offset; /* uint32_t to avoid overflow */
2241 size_t length_needed;
2242 ptrdiff_t vwv_offset;
2243
2244 chain_offset = SVAL(vwv+1, 0);
2245
2246 /*
2247 * Check if the client tries to fool us. The chain
2248 * offset needs to point beyond the current request in
2249 * the chain, it needs to strictly grow. Otherwise we
2250 * might be tricked into an endless loop always
2251 * processing the same request over and over again. We
2252 * used to assume that vwv and the byte buffer array
2253 * in a chain are always attached, but OS/2 the
2254 * Write&X/Read&X chain puts the Read&X vwv array
2255 * right behind the Write&X vwv chain. The Write&X bcc
2256 * array is put behind the Read&X vwv array. So now we
2257 * check whether the chain offset points strictly
2258 * behind the previous vwv array. req->buf points
2259 * right after the vwv array of the previous
2260 * request. See
2261 * https://bugzilla.samba.org/show_bug.cgi?id=8360 for
2262 * more information.
2263 */
2264
2265 vwv_offset = ((const char *)vwv - smb_buf);
2266 if (chain_offset <= vwv_offset) {
2267 return false;
2268 }
2269
2270 /*
2271 * Next check: Make sure the chain offset does not
2272 * point beyond the overall smb request length.
2273 */
2274
2275 length_needed = chain_offset+1; /* wct */
2276 if (length_needed > smblen) {
2277 return false;
2278 }
2279
2280 /*
2281 * Now comes the pointer magic. Goal here is to set up
2282 * vwv and buf correctly again. The chain offset (the
2283 * former vwv[1]) points at the new wct field.
2284 */
2285
2286 wct = CVAL(smb_buf, chain_offset);
2287
2288 if (is_andx_req(chain_cmd) && (wct < 2)) {
2289 return false;
2290 }
2291
2292 /*
2293 * Next consistency check: Make the new vwv array fits
2294 * in the overall smb request.
2295 */
2296
2297 length_needed += (wct+1)*sizeof(uint16_t); /* vwv+buflen */
2298 if (length_needed > smblen) {
2299 return false;
2300 }
2301 vwv = (const uint16_t *)(smb_buf + chain_offset + 1);
2302
2303 /*
2304 * Now grab the new byte buffer....
2305 */
2306
2307 num_bytes = SVAL(vwv+wct, 0);
2308
2309 /*
2310 * .. and check that it fits.
2311 */
2312
2313 length_needed += num_bytes;
2314 if (length_needed > smblen) {
2315 return false;
2316 }
2317 bytes = (const uint8_t *)(vwv+wct+1);
2318
2319 if (!fn(chain_cmd, wct, vwv, num_bytes, bytes, private_data)) {
2320 return false;
2321 }
2322
2323 if (!is_andx_req(chain_cmd)) {
2324 return true;
2325 }
2326 chain_cmd = CVAL(vwv, 0);
2327 }
2328 return true;
2329 }
2330
2331 static bool smb1_chain_length_cb(uint8_t cmd,
2332 uint8_t wct, const uint16_t *vwv,
2333 uint16_t num_bytes, const uint8_t *bytes,
2334 void *private_data)
2335 {
2336 unsigned *count = (unsigned *)private_data;
2337 *count += 1;
2338 return true;
2339 }
2340
2341 unsigned smb1_chain_length(const uint8_t *buf)
2342 {
2343 unsigned count = 0;
2344
2345 if (!smb1_walk_chain(buf, smb1_chain_length_cb, &count)) {
2346 return 0;
2347 }
2348 return count;
2349 }
2350
2351 struct smb1_parse_chain_state {
2352 TALLOC_CTX *mem_ctx;
2353 const uint8_t *buf;
2354 struct smbd_server_connection *sconn;
2355 struct smbXsrv_connection *xconn;
2356 bool encrypted;
2357 uint32_t seqnum;
2358
2359 struct smb_request **reqs;
2360 unsigned num_reqs;
2361 };
2362
2363 static bool smb1_parse_chain_cb(uint8_t cmd,
2364 uint8_t wct, const uint16_t *vwv,
2365 uint16_t num_bytes, const uint8_t *bytes,
2366 void *private_data)
2367 {
2368 struct smb1_parse_chain_state *state =
2369 (struct smb1_parse_chain_state *)private_data;
2370 struct smb_request **reqs;
2371 struct smb_request *req;
2372 bool ok;
2373
2374 reqs = talloc_realloc(state->mem_ctx, state->reqs,
2375 struct smb_request *, state->num_reqs+1);
2376 if (reqs == NULL) {
2377 return false;
2378 }
2379 state->reqs = reqs;
2380
2381 req = talloc(reqs, struct smb_request);
2382 if (req == NULL) {
2383 return false;
2384 }
2385
2386 ok = init_smb_request(req, state->sconn, state->xconn, state->buf, 0,
2387 state->encrypted, state->seqnum);
2388 if (!ok) {
2389 return false;
2390 }
2391 req->cmd = cmd;
2392 req->wct = wct;
2393 req->vwv = vwv;
2394 req->buflen = num_bytes;
2395 req->buf = bytes;
2396
2397 reqs[state->num_reqs] = req;
2398 state->num_reqs += 1;
2399 return true;
2400 }
2401
2402 bool smb1_parse_chain(TALLOC_CTX *mem_ctx, const uint8_t *buf,
2403 struct smbXsrv_connection *xconn,
2404 bool encrypted, uint32_t seqnum,
2405 struct smb_request ***reqs, unsigned *num_reqs)
2406 {
2407 struct smbd_server_connection *sconn = NULL;
2408 struct smb1_parse_chain_state state;
2409 unsigned i;
2410
2411 if (xconn != NULL) {
2412 sconn = xconn->client->sconn;
2413 }
2414
2415 state.mem_ctx = mem_ctx;
2416 state.buf = buf;
2417 state.sconn = sconn;
2418 state.xconn = xconn;
2419 state.encrypted = encrypted;
2420 state.seqnum = seqnum;
2421 state.reqs = NULL;
2422 state.num_reqs = 0;
2423
2424 if (!smb1_walk_chain(buf, smb1_parse_chain_cb, &state)) {
2425 TALLOC_FREE(state.reqs);
2426 return false;
2427 }
2428 for (i=0; i<state.num_reqs; i++) {
2429 state.reqs[i]->chain = state.reqs;
2430 }
2431 *reqs = state.reqs;
2432 *num_reqs = state.num_reqs;
2433 return true;
2434 }
2435
2436 /****************************************************************************
2437 Check if services need reloading.
2438 ****************************************************************************/
2439
2440 static void check_reload(struct smbd_server_connection *sconn, time_t t)
2441 {
2442
2443 if (last_smb_conf_reload_time == 0) {
2444 last_smb_conf_reload_time = t;
2445 }
2446
2447 if (t >= last_smb_conf_reload_time+SMBD_RELOAD_CHECK) {
2448 reload_services(sconn, conn_snum_used, true);
2449 last_smb_conf_reload_time = t;
2450 }
2451 }
2452
2453 static bool fd_is_readable(int fd)
2454 {
2455 int ret, revents;
2456
2457 ret = poll_one_fd(fd, POLLIN|POLLHUP, 0, &revents);
2458
2459 return ((ret > 0) && ((revents & (POLLIN|POLLHUP|POLLERR)) != 0));
2460
2461 }
2462
2463 static void smbd_server_connection_write_handler(
2464 struct smbXsrv_connection *xconn)
2465 {
2466 /* TODO: make write nonblocking */
2467 }
2468
2469 static void smbd_server_connection_read_handler(
2470 struct smbXsrv_connection *xconn, int fd)
2471 {
2472 uint8_t *inbuf = NULL;
2473 size_t inbuf_len = 0;
2474 size_t unread_bytes = 0;
2475 bool encrypted = false;
2476 TALLOC_CTX *mem_ctx = talloc_tos();
2477 NTSTATUS status;
2478 uint32_t seqnum;
2479
2480 bool async_echo = lp_async_smb_echo_handler();
2481 bool from_client = false;
2482
2483 if (async_echo) {
2484 if (fd_is_readable(xconn->smb1.echo_handler.trusted_fd)) {
2485 /*
2486 * This is the super-ugly hack to prefer the packets
2487 * forwarded by the echo handler over the ones by the
2488 * client directly
2489 */
2490 fd = xconn->smb1.echo_handler.trusted_fd;
2491 }
2492 }
2493
2494 from_client = (xconn->transport.sock == fd);
2495
2496 if (async_echo && from_client) {
2497 smbd_lock_socket(xconn);
2498
2499 if (!fd_is_readable(fd)) {
2500 DEBUG(10,("the echo listener was faster\n"));
2501 smbd_unlock_socket(xconn);
2502 return;
2503 }
2504 }
2505
2506 /* TODO: make this completely nonblocking */
2507 status = receive_smb_talloc(mem_ctx, xconn, fd,
2508 (char **)(void *)&inbuf,
2509 0, /* timeout */
2510 &unread_bytes,
2511 &encrypted,
2512 &inbuf_len, &seqnum,
2513 !from_client /* trusted channel */);
2514
2515 if (async_echo && from_client) {
2516 smbd_unlock_socket(xconn);
2517 }
2518
2519 if (NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
2520 goto process;
2521 }
2522 if (NT_STATUS_IS_ERR(status)) {
2523 exit_server_cleanly("failed to receive smb request");
2524 }
2525 if (!NT_STATUS_IS_OK(status)) {
2526 return;
2527 }
2528
2529 process:
2530 process_smb(xconn, inbuf, inbuf_len, unread_bytes,
2531 seqnum, encrypted, NULL);
2532 }
2533
2534 static void smbd_server_connection_handler(struct tevent_context *ev,
2535 struct tevent_fd *fde,
2536 uint16_t flags,
2537 void *private_data)
2538 {
2539 struct smbXsrv_connection *xconn =
2540 talloc_get_type_abort(private_data,
2541 struct smbXsrv_connection);
2542
2543 if (!NT_STATUS_IS_OK(xconn->transport.status)) {
2544 /*
2545 * we're not supposed to do any io
2546 */
2547 TEVENT_FD_NOT_READABLE(xconn->transport.fde);
2548 TEVENT_FD_NOT_WRITEABLE(xconn->transport.fde);
2549 return;
2550 }
2551
2552 if (flags & TEVENT_FD_WRITE) {
2553 smbd_server_connection_write_handler(xconn);
2554 return;
2555 }
2556 if (flags & TEVENT_FD_READ) {
2557 smbd_server_connection_read_handler(xconn, xconn->transport.sock);
2558 return;
2559 }
2560 }
2561
2562 static void smbd_server_echo_handler(struct tevent_context *ev,
2563 struct tevent_fd *fde,
2564 uint16_t flags,
2565 void *private_data)
2566 {
2567 struct smbXsrv_connection *xconn =
2568 talloc_get_type_abort(private_data,
2569 struct smbXsrv_connection);
2570
2571 if (!NT_STATUS_IS_OK(xconn->transport.status)) {
2572 /*
2573 * we're not supposed to do any io
2574 */
2575 TEVENT_FD_NOT_READABLE(xconn->smb1.echo_handler.trusted_fde);
2576 TEVENT_FD_NOT_WRITEABLE(xconn->smb1.echo_handler.trusted_fde);
2577 return;
2578 }
2579
2580 if (flags & TEVENT_FD_WRITE) {
2581 smbd_server_connection_write_handler(xconn);
2582 return;
2583 }
2584 if (flags & TEVENT_FD_READ) {
2585 smbd_server_connection_read_handler(
2586 xconn, xconn->smb1.echo_handler.trusted_fd);
2587 return;
2588 }
2589 }
2590
2591 struct smbd_release_ip_state {
2592 struct smbXsrv_connection *xconn;
2593 struct tevent_immediate *im;
2594 char addr[INET6_ADDRSTRLEN];
2595 };
2596
2597 static void smbd_release_ip_immediate(struct tevent_context *ctx,
2598 struct tevent_immediate *im,
2599 void *private_data)
2600 {
2601 struct smbd_release_ip_state *state =
2602 talloc_get_type_abort(private_data,
2603 struct smbd_release_ip_state);
2604 struct smbXsrv_connection *xconn = state->xconn;
2605
2606 if (!NT_STATUS_EQUAL(xconn->transport.status, NT_STATUS_ADDRESS_CLOSED)) {
2607 /*
2608 * smbd_server_connection_terminate() already triggered ?
2609 */
2610 return;
2611 }
2612
2613 smbd_server_connection_terminate(xconn, "CTDB_SRVID_RELEASE_IP");
2614 }
2615
2616 /****************************************************************************
2617 received when we should release a specific IP
2618 ****************************************************************************/
2619 static int release_ip(uint32_t src_vnn, uint32_t dst_vnn,
2620 uint64_t dst_srvid,
2621 const uint8_t *msg, size_t msglen,
2622 void *private_data)
2623 {
2624 struct smbd_release_ip_state *state =
2625 talloc_get_type_abort(private_data,
2626 struct smbd_release_ip_state);
2627 struct smbXsrv_connection *xconn = state->xconn;
2628 const char *ip;
2629 const char *addr = state->addr;
2630 const char *p = addr;
2631
2632 if (msglen == 0) {
2633 return 0;
2634 }
2635 if (msg[msglen-1] != '\0') {
2636 return 0;
2637 }
2638
2639 ip = (const char *)msg;
2640
2641 if (!NT_STATUS_IS_OK(xconn->transport.status)) {
2642 /* avoid recursion */
2643 return 0;
2644 }
2645
2646 if (strncmp("::ffff:", addr, 7) == 0) {
2647 p = addr + 7;
2648 }
2649
2650 DEBUG(10, ("Got release IP message for %s, "
2651 "our address is %s\n", ip, p));
2652
2653 if ((strcmp(p, ip) == 0) || ((p != addr) && strcmp(addr, ip) == 0)) {
2654 DEBUG(0,("Got release IP message for our IP %s - exiting immediately\n",
2655 ip));
2656 /*
2657 * With SMB2 we should do a clean disconnect,
2658 * the previous_session_id in the session setup
2659 * will cleanup the old session, tcons and opens.
2660 *
2661 * A clean disconnect is needed in order to support
2662 * durable handles.
2663 *
2664 * Note: typically this is never triggered
2665 * as we got a TCP RST (triggered by ctdb event scripts)
2666 * before we get CTDB_SRVID_RELEASE_IP.
2667 *
2668 * We used to call _exit(1) here, but as this was mostly never
2669 * triggered and has implication on our process model,
2670 * we can just use smbd_server_connection_terminate()
2671 * (also for SMB1).
2672 *
2673 * We don't call smbd_server_connection_terminate() directly
2674 * as we might be called from within ctdbd_migrate(),
2675 * we need to defer our action to the next event loop
2676 */
2677 tevent_schedule_immediate(state->im, xconn->ev_ctx,
2678 smbd_release_ip_immediate, state);
2679
2680 /*
2681 * Make sure we don't get any io on the connection.
2682 */
2683 xconn->transport.status = NT_STATUS_ADDRESS_CLOSED;
2684 return EADDRNOTAVAIL;
2685 }
2686
2687 return 0;
2688 }
2689
2690 static NTSTATUS smbd_register_ips(struct smbXsrv_connection *xconn,
2691 struct sockaddr_storage *srv,
2692 struct sockaddr_storage *clnt)
2693 {
2694 struct smbd_release_ip_state *state;
2695 struct ctdbd_connection *cconn;
2696
2697 cconn = messaging_ctdbd_connection();
2698 if (cconn == NULL) {
2699 return NT_STATUS_NO_MEMORY;
2700 }
2701
2702 state = talloc_zero(xconn, struct smbd_release_ip_state);
2703 if (state == NULL) {
2704 return NT_STATUS_NO_MEMORY;
2705 }
2706 state->xconn = xconn;
2707 state->im = tevent_create_immediate(state);
2708 if (state->im == NULL) {
2709 return NT_STATUS_NO_MEMORY;
2710 }
2711 if (print_sockaddr(state->addr, sizeof(state->addr), srv) == NULL) {
2712 return NT_STATUS_NO_MEMORY;
2713 }
2714
2715 return ctdbd_register_ips(cconn, srv, clnt, release_ip, state);
2716 }
2717
2718 static void msg_kill_client_ip(struct messaging_context *msg_ctx,
2719 void *private_data, uint32_t msg_type,
2720 struct server_id server_id, DATA_BLOB *data)
2721 {
2722 struct smbd_server_connection *sconn = talloc_get_type_abort(
2723 private_data, struct smbd_server_connection);
2724 const char *ip = (char *) data->data;
2725 char *client_ip;
2726
2727 DBG_DEBUG("Got kill request for client IP %s\n", ip);
2728
2729 client_ip = tsocket_address_inet_addr_string(sconn->remote_address,
2730 talloc_tos());
2731 if (client_ip == NULL) {
2732 return;
2733 }
2734
2735 if (strequal(ip, client_ip)) {
2736 DBG_WARNING("Got kill client message for %s - "
2737 "exiting immediately\n", ip);
2738 exit_server_cleanly("Forced disconnect for client");
2739 }
2740
2741 TALLOC_FREE(client_ip);
2742 }
2743
2744 /*
2745 * Send keepalive packets to our client
2746 */
2747 static bool keepalive_fn(const struct timeval *now, void *private_data)
2748 {
2749 struct smbd_server_connection *sconn = talloc_get_type_abort(
2750 private_data, struct smbd_server_connection);
2751 struct smbXsrv_connection *xconn = NULL;
2752 bool ret;
2753
2754 if (sconn->using_smb2) {
2755 /* Don't do keepalives on an SMB2 connection. */
2756 return false;
2757 }
2758
2759 /*
2760 * With SMB1 we only have 1 connection
2761 */
2762 xconn = sconn->client->connections;
2763 smbd_lock_socket(xconn);
2764 ret = send_keepalive(xconn->transport.sock);
2765 smbd_unlock_socket(xconn);
2766
2767 if (!ret) {
2768 int saved_errno = errno;
2769 /*
2770 * Try and give an error message saying what
2771 * client failed.
2772 */
2773 DEBUG(0, ("send_keepalive failed for client %s. "
2774 "Error %s - exiting\n",
2775 smbXsrv_connection_dbg(xconn),
2776 strerror(saved_errno)));
2777 errno = saved_errno;
2778 return False;
2779 }
2780 return True;
2781 }
2782
2783 /*
2784 * Do the recurring check if we're idle
2785 */
2786 static bool deadtime_fn(const struct timeval *now, void *private_data)
2787 {
2788 struct smbd_server_connection *sconn =
2789 (struct smbd_server_connection *)private_data;
2790
2791 if ((conn_num_open(sconn) == 0)
2792 || (conn_idle_all(sconn, now->tv_sec))) {
2793 DEBUG( 2, ( "Closing idle connection\n" ) );
2794 messaging_send(sconn->msg_ctx,
2795 messaging_server_id(sconn->msg_ctx),
2796 MSG_SHUTDOWN, &data_blob_null);
2797 return False;
2798 }
2799
2800 return True;
2801 }
2802
2803 /*
2804 * Do the recurring log file and smb.conf reload checks.
2805 */
2806
2807 static bool housekeeping_fn(const struct timeval *now, void *private_data)
2808 {
2809 struct smbd_server_connection *sconn = talloc_get_type_abort(
2810 private_data, struct smbd_server_connection);
2811
2812 DEBUG(5, ("housekeeping\n"));
2813
2814 change_to_root_user();
2815
2816 /* update printer queue caches if necessary */
2817 update_monitored_printq_cache(sconn->msg_ctx);
2818
2819 /* check if we need to reload services */
2820 check_reload(sconn, time_mono(NULL));
2821
2822 /*
2823 * Force a log file check.
2824 */
2825 force_check_log_size();
2826 check_log_size();
2827 return true;
2828 }
2829
2830 /*
2831 * Read an smb packet in the echo handler child, giving the parent
2832 * smbd one second to react once the socket becomes readable.
2833 */
2834
2835 struct smbd_echo_read_state {
2836 struct tevent_context *ev;
2837 struct smbXsrv_connection *xconn;
2838
2839 char *buf;
2840 size_t buflen;
2841 uint32_t seqnum;
2842 };
2843
2844 static void smbd_echo_read_readable(struct tevent_req *subreq);
2845 static void smbd_echo_read_waited(struct tevent_req *subreq);
2846
2847 static struct tevent_req *smbd_echo_read_send(
2848 TALLOC_CTX *mem_ctx, struct tevent_context *ev,
2849 struct smbXsrv_connection *xconn)
2850 {
2851 struct tevent_req *req, *subreq;
2852 struct smbd_echo_read_state *state;
2853
2854 req = tevent_req_create(mem_ctx, &state,
2855 struct smbd_echo_read_state);
2856 if (req == NULL) {
2857 return NULL;
2858 }
2859 state->ev = ev;
2860 state->xconn = xconn;
2861
2862 subreq = wait_for_read_send(state, ev, xconn->transport.sock, false);
2863 if (tevent_req_nomem(subreq, req)) {
2864 return tevent_req_post(req, ev);
2865 }
2866 tevent_req_set_callback(subreq, smbd_echo_read_readable, req);
2867 return req;
2868 }
2869
2870 static void smbd_echo_read_readable(struct tevent_req *subreq)
2871 {
2872 struct tevent_req *req = tevent_req_callback_data(
2873 subreq, struct tevent_req);
2874 struct smbd_echo_read_state *state = tevent_req_data(
2875 req, struct smbd_echo_read_state);
2876 bool ok;
2877 int err;
2878
2879 ok = wait_for_read_recv(subreq, &err);
2880 TALLOC_FREE(subreq);
2881 if (!ok) {
2882 tevent_req_nterror(req, map_nt_error_from_unix(err));
2883 return;
2884 }
2885
2886 /*
2887 * Give the parent smbd one second to step in
2888 */
2889
2890 subreq = tevent_wakeup_send(
2891 state, state->ev, timeval_current_ofs(1, 0));
2892 if (tevent_req_nomem(subreq, req)) {
2893 return;
2894 }
2895 tevent_req_set_callback(subreq, smbd_echo_read_waited, req);
2896 }
2897
2898 static void smbd_echo_read_waited(struct tevent_req *subreq)
2899 {
2900 struct tevent_req *req = tevent_req_callback_data(
2901 subreq, struct tevent_req);
2902 struct smbd_echo_read_state *state = tevent_req_data(
2903 req, struct smbd_echo_read_state);
2904 struct smbXsrv_connection *xconn = state->xconn;
2905 bool ok;
2906 NTSTATUS status;
2907 size_t unread = 0;
2908 bool encrypted;
2909
2910 ok = tevent_wakeup_recv(subreq);
2911 TALLOC_FREE(subreq);
2912 if (!ok) {
2913 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
2914 return;
2915 }
2916
2917 ok = smbd_lock_socket_internal(xconn);
2918 if (!ok) {
2919 tevent_req_nterror(req, map_nt_error_from_unix(errno));
2920 DEBUG(0, ("%s: failed to lock socket\n", __location__));
2921 return;
2922 }
2923
2924 if (!fd_is_readable(xconn->transport.sock)) {
2925 DEBUG(10,("echo_handler[%d] the parent smbd was faster\n",
2926 (int)getpid()));
2927
2928 ok = smbd_unlock_socket_internal(xconn);
2929 if (!ok) {
2930 tevent_req_nterror(req, map_nt_error_from_unix(errno));
2931 DEBUG(1, ("%s: failed to unlock socket\n",
2932 __location__));
2933 return;
2934 }
2935
2936 subreq = wait_for_read_send(state, state->ev,
2937 xconn->transport.sock, false);
2938 if (tevent_req_nomem(subreq, req)) {
2939 return;
2940 }
2941 tevent_req_set_callback(subreq, smbd_echo_read_readable, req);
2942 return;
2943 }
2944
2945 status = receive_smb_talloc(state, xconn,
2946 xconn->transport.sock,
2947 &state->buf,
2948 0 /* timeout */,
2949 &unread,
2950 &encrypted,
2951 &state->buflen,
2952 &state->seqnum,
2953 false /* trusted_channel*/);
2954
2955 if (tevent_req_nterror(req, status)) {
2956 tevent_req_nterror(req, status);
2957 DEBUG(1, ("echo_handler[%d]: receive_smb_raw_talloc failed: %s\n",
2958 (int)getpid(), nt_errstr(status)));
2959 return;
2960 }
2961
2962 ok = smbd_unlock_socket_internal(xconn);
2963 if (!ok) {
2964 tevent_req_nterror(req, map_nt_error_from_unix(errno));
2965 DEBUG(1, ("%s: failed to unlock socket\n", __location__));
2966 return;
2967 }
2968 tevent_req_done(req);
2969 }
2970
2971 static NTSTATUS smbd_echo_read_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
2972 char **pbuf, size_t *pbuflen, uint32_t *pseqnum)
2973 {
2974 struct smbd_echo_read_state *state = tevent_req_data(
2975 req, struct smbd_echo_read_state);
2976 NTSTATUS status;
2977
2978 if (tevent_req_is_nterror(req, &status)) {
2979 return status;
2980 }
2981 *pbuf = talloc_move(mem_ctx, &state->buf);
2982 *pbuflen = state->buflen;
2983 *pseqnum = state->seqnum;
2984 return NT_STATUS_OK;
2985 }
2986
2987 struct smbd_echo_state {
2988 struct tevent_context *ev;
2989 struct iovec *pending;
2990 struct smbd_server_connection *sconn;
2991 struct smbXsrv_connection *xconn;
2992 int parent_pipe;
2993
2994 struct tevent_fd *parent_fde;
2995
2996 struct tevent_req *write_req;
2997 };
2998
2999 static void smbd_echo_writer_done(struct tevent_req *req);
3000
3001 static void smbd_echo_activate_writer(struct smbd_echo_state *state)
3002 {
3003 int num_pending;
3004
3005 if (state->write_req != NULL) {
3006 return;
3007 }
3008
3009 num_pending = talloc_array_length(state->pending);
3010 if (num_pending == 0) {
3011 return;
3012 }
3013
3014 state->write_req = writev_send(state, state->ev, NULL,
3015 state->parent_pipe, false,
3016 state->pending, num_pending);
3017 if (state->write_req == NULL) {
3018 DEBUG(1, ("writev_send failed\n"));
3019 exit(1);
3020 }
3021
3022 talloc_steal(state->write_req, state->pending);
3023 state->pending = NULL;
3024
3025 tevent_req_set_callback(state->write_req, smbd_echo_writer_done,
3026 state);
3027 }
3028
3029 static void smbd_echo_writer_done(struct tevent_req *req)
3030 {
3031 struct smbd_echo_state *state = tevent_req_callback_data(
3032 req, struct smbd_echo_state);
3033 ssize_t written;
3034 int err;
3035
3036 written = writev_recv(req, &err);
3037 TALLOC_FREE(req);
3038 state->write_req = NULL;
3039 if (written == -1) {
3040 DEBUG(1, ("writev to parent failed: %s\n", strerror(err)));
3041 exit(1);
3042 }
3043 DEBUG(10,("echo_handler[%d]: forwarded pdu to main\n", (int)getpid()));
3044 smbd_echo_activate_writer(state);
3045 }
3046
3047 static bool smbd_echo_reply(struct smbd_echo_state *state,
3048 uint8_t *inbuf, size_t inbuf_len,
3049 uint32_t seqnum)
3050 {
3051 struct smb_request req;
3052 uint16_t num_replies;
3053 char *outbuf;
3054 bool ok;
3055
3056 if ((inbuf_len == 4) && (CVAL(inbuf, 0) == NBSSkeepalive)) {
3057 DEBUG(10, ("Got netbios keepalive\n"));
3058 /*
3059 * Just swallow it
3060 */
3061 return true;
3062 }
3063
3064 if (inbuf_len < smb_size) {
3065 DEBUG(10, ("Got short packet: %d bytes\n", (int)inbuf_len));
3066 return false;
3067 }
3068 if (!valid_smb_header(inbuf)) {
3069 DEBUG(10, ("Got invalid SMB header\n"));
3070 return false;
3071 }
3072
3073 if (!init_smb_request(&req, state->sconn, state->xconn, inbuf, 0, false,
3074 seqnum)) {
3075 return false;
3076 }
3077 req.inbuf = inbuf;
3078
3079 DEBUG(10, ("smbecho handler got cmd %d (%s)\n", (int)req.cmd,
3080 smb_messages[req.cmd].name
3081 ? smb_messages[req.cmd].name : "unknown"));
3082
3083 if (req.cmd != SMBecho) {
3084 return false;
3085 }
3086 if (req.wct < 1) {
3087 return false;
3088 }
3089
3090 num_replies = SVAL(req.vwv+0, 0);
3091 if (num_replies != 1) {
3092 /* Not a Windows "Hey, you're still there?" request */
3093 return false;
3094 }
3095
3096 if (!create_outbuf(talloc_tos(), &req, req.inbuf, &outbuf,
3097 1, req.buflen)) {
3098 DEBUG(10, ("create_outbuf failed\n"));
3099 return false;
3100 }
3101 req.outbuf = (uint8_t *)outbuf;
3102
3103 SSVAL(req.outbuf, smb_vwv0, num_replies);
3104
3105 if (req.buflen > 0) {
3106 memcpy(smb_buf(req.outbuf), req.buf, req.buflen);
3107 }
3108
3109 ok = srv_send_smb(req.xconn,
3110 (char *)outbuf,
3111 true, seqnum+1,
3112 false, &req.pcd);
3113 TALLOC_FREE(outbuf);
3114 if (!ok) {
3115 exit(1);
3116 }
3117
3118 return true;
3119 }
3120
3121 static void smbd_echo_exit(struct tevent_context *ev,
3122 struct tevent_fd *fde, uint16_t flags,
3123 void *private_data)
3124 {
3125 DEBUG(2, ("smbd_echo_exit: lost connection to parent\n"));
3126 exit(0);
3127 }
3128
3129 static void smbd_echo_got_packet(struct tevent_req *req);
3130
3131 static void smbd_echo_loop(struct smbXsrv_connection *xconn,
3132 int parent_pipe)
3133 {
3134 struct smbd_echo_state *state;
3135 struct tevent_req *read_req;
3136
3137 state = talloc_zero(xconn, struct smbd_echo_state);
3138 if (state == NULL) {
3139 DEBUG(1, ("talloc failed\n"));
3140 return;
3141 }
3142 state->xconn = xconn;
3143 state->parent_pipe = parent_pipe;
3144 state->ev = s3_tevent_context_init(state);
3145 if (state->ev == NULL) {
3146 DEBUG(1, ("tevent_context_init failed\n"));
3147 TALLOC_FREE(state);
3148 return;
3149 }
3150 state->parent_fde = tevent_add_fd(state->ev, state, parent_pipe,
3151 TEVENT_FD_READ, smbd_echo_exit,
3152 state);
3153 if (state->parent_fde == NULL) {
3154 DEBUG(1, ("tevent_add_fd failed\n"));
3155 TALLOC_FREE(state);
3156 return;
3157 }
3158
3159 read_req = smbd_echo_read_send(state, state->ev, xconn);
3160 if (read_req == NULL) {
3161 DEBUG(1, ("smbd_echo_read_send failed\n"));
3162 TALLOC_FREE(state);
3163 return;
3164 }
3165 tevent_req_set_callback(read_req, smbd_echo_got_packet, state);
3166
3167 while (true) {
3168 if (tevent_loop_once(state->ev) == -1) {
3169 DEBUG(1, ("tevent_loop_once failed: %s\n",
3170 strerror(errno)));
3171 break;
3172 }
3173 }
3174 TALLOC_FREE(state);
3175 }
3176
3177 static void smbd_echo_got_packet(struct tevent_req *req)
3178 {
3179 struct smbd_echo_state *state = tevent_req_callback_data(
3180 req, struct smbd_echo_state);
3181 NTSTATUS status;
3182 char *buf = NULL;
3183 size_t buflen = 0;
3184 uint32_t seqnum = 0;
3185 bool reply;
3186
3187 status = smbd_echo_read_recv(req, state, &buf, &buflen, &seqnum);
3188 TALLOC_FREE(req);
3189 if (!NT_STATUS_IS_OK(status)) {
3190 DEBUG(1, ("smbd_echo_read_recv returned %s\n",
3191 nt_errstr(status)));
3192 exit(1);
3193 }
3194
3195 reply = smbd_echo_reply(state, (uint8_t *)buf, buflen, seqnum);
3196 if (!reply) {
3197 size_t num_pending;
3198 struct iovec *tmp;
3199 struct iovec *iov;
3200
3201 num_pending = talloc_array_length(state->pending);
3202 tmp = talloc_realloc(state, state->pending, struct iovec,
3203 num_pending+1);
3204 if (tmp == NULL) {
3205 DEBUG(1, ("talloc_realloc failed\n"));
3206 exit(1);
3207 }
3208 state->pending = tmp;
3209
3210 if (buflen >= smb_size) {
3211 /*
3212 * place the seqnum in the packet so that the main process
3213 * can reply with signing
3214 */
3215 SIVAL(buf, smb_ss_field, seqnum);
3216 SIVAL(buf, smb_ss_field+4, NT_STATUS_V(NT_STATUS_OK));
3217 }
3218
3219 iov = &state->pending[num_pending];
3220 iov->iov_base = talloc_move(state->pending, &buf);
3221 iov->iov_len = buflen;
3222
3223 DEBUG(10,("echo_handler[%d]: forward to main\n",
3224 (int)getpid()));
3225 smbd_echo_activate_writer(state);
3226 }
3227
3228 req = smbd_echo_read_send(state, state->ev, state->xconn);
3229 if (req == NULL) {
3230 DEBUG(1, ("smbd_echo_read_send failed\n"));
3231 exit(1);
3232 }
3233 tevent_req_set_callback(req, smbd_echo_got_packet, state);
3234 }
3235
3236
3237 /*
3238 * Handle SMBecho requests in a forked child process
3239 */
3240 bool fork_echo_handler(struct smbXsrv_connection *xconn)
3241 {
3242 int listener_pipe[2];
3243 int res;
3244 pid_t child;
3245 bool use_mutex = false;
3246
3247 res = pipe(listener_pipe);
3248 if (res == -1) {
3249 DEBUG(1, ("pipe() failed: %s\n", strerror(errno)));
3250 return false;
3251 }
3252
3253 #ifdef HAVE_ROBUST_MUTEXES
3254 use_mutex = tdb_runtime_check_for_robust_mutexes();
3255
3256 if (use_mutex) {
3257 pthread_mutexattr_t a;
3258
3259 xconn->smb1.echo_handler.socket_mutex =
3260 anonymous_shared_allocate(sizeof(pthread_mutex_t));
3261 if (xconn->smb1.echo_handler.socket_mutex == NULL) {
3262 DEBUG(1, ("Could not create mutex shared memory: %s\n",
3263 strerror(errno)));
3264 goto fail;
3265 }
3266
3267 res = pthread_mutexattr_init(&a);
3268 if (res != 0) {
3269 DEBUG(1, ("pthread_mutexattr_init failed: %s\n",
3270 strerror(res)));
3271 goto fail;
3272 }
3273 res = pthread_mutexattr_settype(&a, PTHREAD_MUTEX_ERRORCHECK);
3274 if (res != 0) {
3275 DEBUG(1, ("pthread_mutexattr_settype failed: %s\n",
3276 strerror(res)));
3277 pthread_mutexattr_destroy(&a);
3278 goto fail;
3279 }
3280 res = pthread_mutexattr_setpshared(&a, PTHREAD_PROCESS_SHARED);
3281 if (res != 0) {
3282 DEBUG(1, ("pthread_mutexattr_setpshared failed: %s\n",
3283 strerror(res)));
3284 pthread_mutexattr_destroy(&a);
3285 goto fail;
3286 }
3287 res = pthread_mutexattr_setrobust(&a, PTHREAD_MUTEX_ROBUST);
3288 if (res != 0) {
3289 DEBUG(1, ("pthread_mutexattr_setrobust failed: "
3290 "%s\n", strerror(res)));
3291 pthread_mutexattr_destroy(&a);
3292 goto fail;
3293 }
3294 res = pthread_mutex_init(xconn->smb1.echo_handler.socket_mutex,
3295 &a);
3296 pthread_mutexattr_destroy(&a);
3297 if (res != 0) {
3298 DEBUG(1, ("pthread_mutex_init failed: %s\n",
3299 strerror(res)));
3300 goto fail;
3301 }
3302 }
3303 #endif
3304
3305 if (!use_mutex) {
3306 xconn->smb1.echo_handler.socket_lock_fd =
3307 create_unlink_tmp(lp_lock_directory());
3308 if (xconn->smb1.echo_handler.socket_lock_fd == -1) {
3309 DEBUG(1, ("Could not create lock fd: %s\n",
3310 strerror(errno)));
3311 goto fail;
3312 }
3313 }
3314
3315 child = fork();
3316 if (child == 0) {
3317 NTSTATUS status;
3318
3319 close(listener_pipe[0]);
3320 set_blocking(listener_pipe[1], false);
3321
3322 status = smbd_reinit_after_fork(xconn->msg_ctx, xconn->ev_ctx, true);
3323 if (!NT_STATUS_IS_OK(status)) {
3324 DEBUG(1, ("reinit_after_fork failed: %s\n",
3325 nt_errstr(status)));
3326 exit(1);
3327 }
3328 smbd_echo_loop(xconn, listener_pipe[1]);
3329 exit(0);
3330 }
3331 close(listener_pipe[1]);
3332 listener_pipe[1] = -1;
3333 xconn->smb1.echo_handler.trusted_fd = listener_pipe[0];
3334
3335 DEBUG(10,("fork_echo_handler: main[%d] echo_child[%d]\n", (int)getpid(), (int)child));
3336
3337 /*
3338 * Without smb signing this is the same as the normal smbd
3339 * listener. This needs to change once signing comes in.
3340 */
3341 xconn->smb1.echo_handler.trusted_fde = tevent_add_fd(xconn->ev_ctx,
3342 xconn,
3343 xconn->smb1.echo_handler.trusted_fd,
3344 TEVENT_FD_READ,
3345 smbd_server_echo_handler,
3346 xconn);
3347 if (xconn->smb1.echo_handler.trusted_fde == NULL) {
3348 DEBUG(1, ("event_add_fd failed\n"));
3349 goto fail;
3350 }
3351
3352 return true;
3353
3354 fail:
3355 if (listener_pipe[0] != -1) {
3356 close(listener_pipe[0]);
3357 }
3358 if (listener_pipe[1] != -1) {
3359 close(listener_pipe[1]);
3360 }
3361 if (xconn->smb1.echo_handler.socket_lock_fd != -1) {
3362 close(xconn->smb1.echo_handler.socket_lock_fd);
3363 }
3364 #ifdef HAVE_ROBUST_MUTEXES
3365 if (xconn->smb1.echo_handler.socket_mutex != NULL) {
3366 pthread_mutex_destroy(xconn->smb1.echo_handler.socket_mutex);
3367 anonymous_shared_free(xconn->smb1.echo_handler.socket_mutex);
3368 }
3369 #endif
3370 smbd_echo_init(xconn);
3371
3372 return false;
3373 }
3374
3375 static bool uid_in_use(const struct user_struct *user, uid_t uid)
3376 {
3377 while (user) {
3378 if (user->session_info &&
3379 (user->session_info->unix_token->uid == uid)) {
3380 return true;
3381 }
3382 user = user->next;
3383 }
3384 return false;
3385 }
3386
3387 static bool gid_in_use(const struct user_struct *user, gid_t gid)
3388 {
3389 while (user) {
3390 if (user->session_info != NULL) {
3391 int i;
3392 struct security_unix_token *utok;
3393
3394 utok = user->session_info->unix_token;
3395 if (utok->gid == gid) {
3396 return true;
3397 }
3398 for(i=0; i<utok->ngroups; i++) {
3399 if (utok->groups[i] == gid) {
3400 return true;
3401 }
3402 }
3403 }
3404 user = user->next;
3405 }
3406 return false;
3407 }
3408
3409 static bool sid_in_use(const struct user_struct *user,
3410 const struct dom_sid *psid)
3411 {
3412 while (user) {
3413 struct security_token *tok;
3414
3415 if (user->session_info == NULL) {
3416 continue;
3417 }
3418 tok = user->session_info->security_token;
3419 if (tok == NULL) {
3420 /*
3421 * Not sure session_info->security_token can
3422 * ever be NULL. This check might be not
3423 * necessary.
3424 */
3425 continue;
3426 }
3427 if (security_token_has_sid(tok, psid)) {
3428 return true;
3429 }
3430 user = user->next;
3431 }
3432 return false;
3433 }
3434
3435 static bool id_in_use(const struct user_struct *user,
3436 const struct id_cache_ref *id)
3437 {
3438 switch(id->type) {
3439 case UID:
3440 return uid_in_use(user, id->id.uid);
3441 case GID:
3442 return gid_in_use(user, id->id.gid);
3443 case SID:
3444 return sid_in_use(user, &id->id.sid);
3445 default:
3446 break;
3447 }
3448 return false;
3449 }
3450
3451 static void smbd_id_cache_kill(struct messaging_context *msg_ctx,
3452 void *private_data,
3453 uint32_t msg_type,
3454 struct server_id server_id,
3455 DATA_BLOB* data)
3456 {
3457 const char *msg = (data && data->data)
3458 ? (const char *)data->data : "<NULL>";
3459 struct id_cache_ref id;
3460 struct smbd_server_connection *sconn =
3461 talloc_get_type_abort(private_data,
3462 struct smbd_server_connection);
3463
3464 if (!id_cache_ref_parse(msg, &id)) {
3465 DEBUG(0, ("Invalid ?ID: %s\n", msg));
3466 return;
3467 }
3468
3469 if (id_in_use(sconn->users, &id)) {
3470 exit_server_cleanly(msg);
3471 }
3472 id_cache_delete_from_cache(&id);
3473 }
3474
3475 NTSTATUS smbXsrv_connection_init_tables(struct smbXsrv_connection *conn,
3476 enum protocol_types protocol)
3477 {
3478 NTSTATUS status;
3479
3480 conn->protocol = protocol;
3481
3482 if (protocol >= PROTOCOL_SMB2_02) {
3483 status = smb2srv_session_table_init(conn);
3484 if (!NT_STATUS_IS_OK(status)) {
3485 conn->protocol = PROTOCOL_NONE;
3486 return status;
3487 }
3488
3489 status = smb2srv_open_table_init(conn);
3490 if (!NT_STATUS_IS_OK(status)) {
3491 conn->protocol = PROTOCOL_NONE;
3492 return status;
3493 }
3494 } else {
3495 status = smb1srv_session_table_init(conn);
3496 if (!NT_STATUS_IS_OK(status)) {
3497 conn->protocol = PROTOCOL_NONE;
3498 return status;
3499 }
3500
3501 status = smb1srv_tcon_table_init(conn);
3502 if (!NT_STATUS_IS_OK(status)) {
3503 conn->protocol = PROTOCOL_NONE;
3504 return status;
3505 }
3506
3507 status = smb1srv_open_table_init(conn);
3508 if (!NT_STATUS_IS_OK(status)) {
3509 conn->protocol = PROTOCOL_NONE;
3510 return status;
3511 }
3512 }
3513
3514 set_Protocol(protocol);
3515 return NT_STATUS_OK;
3516 }
3517
3518 struct smbd_tevent_trace_state {
3519 struct tevent_context *ev;
3520 TALLOC_CTX *frame;
3521 SMBPROFILE_BASIC_ASYNC_STATE(profile_idle);
3522 };
3523
3524 static void smbd_tevent_trace_callback(enum tevent_trace_point point,
3525 void *private_data)
3526 {
3527 struct smbd_tevent_trace_state *state =
3528 (struct smbd_tevent_trace_state *)private_data;
3529
3530 switch (point) {
3531 case TEVENT_TRACE_BEFORE_WAIT:
3532 if (!smbprofile_dump_pending()) {
3533 /*
3534 * If there's no dump pending
3535 * we don't want to schedule a new 1 sec timer.
3536 *
3537 * Instead we want to sleep as long as nothing happens.
3538 */
3539 smbprofile_dump_setup(NULL);
3540 }
3541 SMBPROFILE_BASIC_ASYNC_START(idle, profile_p, state->profile_idle);
3542 break;
3543 case TEVENT_TRACE_AFTER_WAIT:
3544 SMBPROFILE_BASIC_ASYNC_END(state->profile_idle);
3545 if (!smbprofile_dump_pending()) {
3546 /*
3547 * We need to flush our state after sleeping
3548 * (hopefully a long time).
3549 */
3550 smbprofile_dump();
3551 /*
3552 * future profiling events should trigger timers
3553 * on our main event context.
3554 */
3555 smbprofile_dump_setup(state->ev);
3556 }
3557 break;
3558 case TEVENT_TRACE_BEFORE_LOOP_ONCE:
3559 TALLOC_FREE(state->frame);
3560 state->frame = talloc_stackframe_pool(8192);
3561 break;
3562 case TEVENT_TRACE_AFTER_LOOP_ONCE:
3563 TALLOC_FREE(state->frame);
3564 break;
3565 }
3566
3567 errno = 0;
3568 }
3569
3570 /**
3571 * Create a debug string for the connection
3572 *
3573 * This is allocated to talloc_tos() or a string constant
3574 * in certain corner cases. The returned string should
3575 * hence not be free'd directly but only via the talloc stack.
3576 */
3577 const char *smbXsrv_connection_dbg(const struct smbXsrv_connection *xconn)
3578 {
3579 const char *ret;
3580
3581 /*
3582 * TODO: this can be improved later
3583 * maybe including the client guid or more
3584 */
3585 ret = tsocket_address_string(xconn->remote_address, talloc_tos());
3586 if (ret == NULL) {
3587 return "<tsocket_address_string() failed>";
3588 }
3589
3590 return ret;
3591 }
3592
3593 NTSTATUS smbd_add_connection(struct smbXsrv_client *client, int sock_fd,
3594 struct smbXsrv_connection **_xconn)
3595 {
3596 TALLOC_CTX *frame = talloc_stackframe();
3597 struct smbXsrv_connection *xconn;
3598 struct sockaddr_storage ss_srv;
3599 void *sp_srv = (void *)&ss_srv;
3600 struct sockaddr *sa_srv = (struct sockaddr *)sp_srv;
3601 struct sockaddr_storage ss_clnt;
3602 void *sp_clnt = (void *)&ss_clnt;
3603 struct sockaddr *sa_clnt = (struct sockaddr *)sp_clnt;
3604 socklen_t sa_socklen;
3605 struct tsocket_address *local_address = NULL;
3606 struct tsocket_address *remote_address = NULL;
3607 const char *remaddr = NULL;
3608 char *p;
3609 const char *rhost = NULL;
3610 int ret;
3611 int tmp;
3612
3613 *_xconn = NULL;
3614
3615 DO_PROFILE_INC(connect);
3616
3617 xconn = talloc_zero(client, struct smbXsrv_connection);
3618 if (xconn == NULL) {
3619 DEBUG(0,("talloc_zero(struct smbXsrv_connection)\n"));
3620 TALLOC_FREE(frame);
3621 return NT_STATUS_NO_MEMORY;
3622 }
3623 talloc_steal(frame, xconn);
3624
3625 xconn->ev_ctx = client->ev_ctx;
3626 xconn->msg_ctx = client->msg_ctx;
3627 xconn->transport.sock = sock_fd;
3628 smbd_echo_init(xconn);
3629 xconn->protocol = PROTOCOL_NONE;
3630
3631 /* Ensure child is set to blocking mode */
3632 set_blocking(sock_fd,True);
3633
3634 set_socket_options(sock_fd, "SO_KEEPALIVE");
3635 set_socket_options(sock_fd, lp_socket_options());
3636
3637 sa_socklen = sizeof(ss_clnt);
3638 ret = getpeername(sock_fd, sa_clnt, &sa_socklen);
3639 if (ret != 0) {
3640 int saved_errno = errno;
3641 int level = (errno == ENOTCONN)?2:0;
3642 DEBUG(level,("getpeername() failed - %s\n",
3643 strerror(saved_errno)));
3644 TALLOC_FREE(frame);
3645 return map_nt_error_from_unix_common(saved_errno);
3646 }
3647 ret = tsocket_address_bsd_from_sockaddr(xconn,
3648 sa_clnt, sa_socklen,
3649 &remote_address);
3650 if (ret != 0) {
3651 int saved_errno = errno;
3652 DEBUG(0,("%s: tsocket_address_bsd_from_sockaddr remote failed - %s\n",
3653 __location__, strerror(saved_errno)));
3654 TALLOC_FREE(frame);
3655 return map_nt_error_from_unix_common(saved_errno);
3656 }
3657
3658 sa_socklen = sizeof(ss_srv);
3659 ret = getsockname(sock_fd, sa_srv, &sa_socklen);
3660 if (ret != 0) {
3661 int saved_errno = errno;
3662 int level = (errno == ENOTCONN)?2:0;
3663 DEBUG(level,("getsockname() failed - %s\n",
3664 strerror(saved_errno)));
3665 TALLOC_FREE(frame);
3666 return map_nt_error_from_unix_common(saved_errno);
3667 }
3668 ret = tsocket_address_bsd_from_sockaddr(xconn,
3669 sa_srv, sa_socklen,
3670 &local_address);
3671 if (ret != 0) {
3672 int saved_errno = errno;
3673 DEBUG(0,("%s: tsocket_address_bsd_from_sockaddr remote failed - %s\n",
3674 __location__, strerror(saved_errno)));
3675 TALLOC_FREE(frame);
3676 return map_nt_error_from_unix_common(saved_errno);
3677 }
3678
3679 if (tsocket_address_is_inet(remote_address, "ip")) {
3680 remaddr = tsocket_address_inet_addr_string(remote_address,
3681 talloc_tos());
3682 if (remaddr == NULL) {
3683 DEBUG(0,("%s: tsocket_address_inet_addr_string remote failed - %s\n",
3684 __location__, strerror(errno)));
3685 TALLOC_FREE(frame);
3686 return NT_STATUS_NO_MEMORY;
3687 }
3688 } else {
3689 remaddr = "0.0.0.0";
3690 }
3691
3692 /*
3693 * Before the first packet, check the global hosts allow/ hosts deny
3694 * parameters before doing any parsing of packets passed to us by the
3695 * client. This prevents attacks on our parsing code from hosts not in
3696 * the hosts allow list.
3697 */
3698
3699 ret = get_remote_hostname(remote_address,
3700 &p, talloc_tos());
3701 if (ret < 0) {
3702 int saved_errno = errno;
3703 DEBUG(0,("%s: get_remote_hostname failed - %s\n",
3704 __location__, strerror(saved_errno)));
3705 TALLOC_FREE(frame);
3706 return map_nt_error_from_unix_common(saved_errno);
3707 }
3708 rhost = p;
3709 if (strequal(rhost, "UNKNOWN")) {
3710 rhost = remaddr;
3711 }
3712
3713 xconn->local_address = local_address;
3714 xconn->remote_address = remote_address;
3715 xconn->remote_hostname = talloc_strdup(xconn, rhost);
3716 if (xconn->remote_hostname == NULL) {
3717 return NT_STATUS_NO_MEMORY;
3718 }
3719
3720 if (!srv_init_signing(xconn)) {
3721 DEBUG(0, ("Failed to init smb_signing\n"));
3722 TALLOC_FREE(frame);
3723 return NT_STATUS_INTERNAL_ERROR;
3724 }
3725
3726 if (!allow_access(lp_hosts_deny(-1), lp_hosts_allow(-1),
3727 xconn->remote_hostname,
3728 remaddr)) {
3729 DEBUG( 1, ("Connection denied from %s to %s\n",
3730 tsocket_address_string(remote_address, talloc_tos()),
3731 tsocket_address_string(local_address, talloc_tos())));
3732
3733 /*
3734 * We return a valid xconn
3735 * so that the caller can return an error message
3736 * to the client
3737 */
3738 client->connections = xconn;
3739 xconn->client = client;
3740 talloc_steal(client, xconn);
3741
3742 *_xconn = xconn;
3743 TALLOC_FREE(frame);
3744 return NT_STATUS_NETWORK_ACCESS_DENIED;
3745 }
3746
3747 DEBUG(10, ("Connection allowed from %s to %s\n",
3748 tsocket_address_string(remote_address, talloc_tos()),
3749 tsocket_address_string(local_address, talloc_tos())));
3750
3751 if (lp_clustering()) {
3752 /*
3753 * We need to tell ctdb about our client's TCP
3754 * connection, so that for failover ctdbd can send
3755 * tickle acks, triggering a reconnection by the
3756 * client.
3757 */
3758 NTSTATUS status;
3759
3760 status = smbd_register_ips(xconn, &ss_srv, &ss_clnt);
3761 if (!NT_STATUS_IS_OK(status)) {
3762 DEBUG(0, ("ctdbd_register_ips failed: %s\n",
3763 nt_errstr(status)));
3764 }
3765 }
3766
3767 tmp = lp_max_xmit();
3768 tmp = MAX(tmp, SMB_BUFFER_SIZE_MIN);
3769 tmp = MIN(tmp, SMB_BUFFER_SIZE_MAX);
3770
3771 xconn->smb1.negprot.max_recv = tmp;
3772
3773 xconn->smb1.sessions.done_sesssetup = false;
3774 xconn->smb1.sessions.max_send = SMB_BUFFER_SIZE_MAX;
3775
3776 xconn->transport.fde = tevent_add_fd(client->ev_ctx,
3777 xconn,
3778 sock_fd,
3779 TEVENT_FD_READ,
3780 smbd_server_connection_handler,
3781 xconn);
3782 if (!xconn->transport.fde) {
3783 TALLOC_FREE(frame);
3784 return NT_STATUS_NO_MEMORY;
3785 }
3786
3787 /* for now we only have one connection */
3788 DLIST_ADD_END(client->connections, xconn, NULL);
3789 xconn->client = client;
3790 talloc_steal(client, xconn);
3791
3792 *_xconn = xconn;
3793 TALLOC_FREE(frame);
3794 return NT_STATUS_OK;
3795 }
3796
3797 /****************************************************************************
3798 Process commands from the client
3799 ****************************************************************************/
3800
3801 void smbd_process(struct tevent_context *ev_ctx,
3802 struct messaging_context *msg_ctx,
3803 int sock_fd,
3804 bool interactive)
3805 {
3806 struct smbd_tevent_trace_state trace_state = {
3807 .ev = ev_ctx,
3808 .frame = talloc_stackframe(),
3809 };
3810 struct smbXsrv_client *client = NULL;
3811 struct smbd_server_connection *sconn = NULL;
3812 struct smbXsrv_connection *xconn = NULL;
3813 const char *locaddr = NULL;
3814 const char *remaddr = NULL;
3815 int ret;
3816 NTSTATUS status;
3817
3818 client = talloc_zero(ev_ctx, struct smbXsrv_client);
3819 if (client == NULL) {
3820 DEBUG(0,("talloc_zero(struct smbXsrv_client)\n"));
3821 exit_server_cleanly("talloc_zero(struct smbXsrv_client).\n");
3822 }
3823
3824 /*
3825 * TODO: remove this...:-)
3826 */
3827 global_smbXsrv_client = client;
3828
3829 client->ev_ctx = ev_ctx;
3830 client->msg_ctx = msg_ctx;
3831
3832 sconn = talloc_zero(client, struct smbd_server_connection);
3833 if (sconn == NULL) {
3834 exit_server("failed to create smbd_server_connection");
3835 }
3836
3837 client->sconn = sconn;
3838 sconn->client = client;
3839
3840 sconn->ev_ctx = ev_ctx;
3841 sconn->msg_ctx = msg_ctx;
3842
3843 if (lp_server_max_protocol() >= PROTOCOL_SMB2_02) {
3844 /*
3845 * We're not making the decision here,
3846 * we're just allowing the client
3847 * to decide between SMB1 and SMB2
3848 * with the first negprot
3849 * packet.
3850 */
3851 sconn->using_smb2 = true;
3852 }
3853
3854 if (!interactive) {
3855 smbd_setup_sig_term_handler(sconn);
3856 smbd_setup_sig_hup_handler(sconn);
3857
3858 if (!serverid_register(messaging_server_id(msg_ctx),
3859 FLAG_MSG_GENERAL|FLAG_MSG_SMBD
3860 |FLAG_MSG_DBWRAP
3861 |FLAG_MSG_PRINT_GENERAL)) {
3862 exit_server_cleanly("Could not register myself in "
3863 "serverid.tdb");
3864 }
3865 }
3866
3867 status = smbd_add_connection(client, sock_fd, &xconn);
3868 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_ACCESS_DENIED)) {
3869 /*
3870 * send a negative session response "not listening on calling
3871 * name"
3872 */
3873 unsigned char buf[5] = {0x83, 0, 0, 1, 0x81};
3874 (void)srv_send_smb(xconn,(char *)buf, false,
3875 0, false, NULL);
3876 exit_server_cleanly("connection denied");
3877 } else if (!NT_STATUS_IS_OK(status)) {
3878 exit_server_cleanly(nt_errstr(status));
3879 }
3880
3881 sconn->local_address =
3882 tsocket_address_copy(xconn->local_address, sconn);
3883 if (sconn->local_address == NULL) {
3884 exit_server_cleanly("tsocket_address_copy() failed");
3885 }
3886 sconn->remote_address =
3887 tsocket_address_copy(xconn->remote_address, sconn);
3888 if (sconn->remote_address == NULL) {
3889 exit_server_cleanly("tsocket_address_copy() failed");
3890 }
3891 sconn->remote_hostname =
3892 talloc_strdup(sconn, xconn->remote_hostname);
3893 if (sconn->remote_hostname == NULL) {
3894 exit_server_cleanly("tsocket_strdup() failed");
3895 }
3896
3897 if (tsocket_address_is_inet(sconn->local_address, "ip")) {
3898 locaddr = tsocket_address_inet_addr_string(
3899 sconn->local_address,
3900 talloc_tos());
3901 if (locaddr == NULL) {
3902 DEBUG(0,("%s: tsocket_address_inet_addr_string remote failed - %s\n",
3903 __location__, strerror(errno)));
3904 exit_server_cleanly("tsocket_address_inet_addr_string remote failed.\n");
3905 }
3906 } else {
3907 locaddr = "0.0.0.0";
3908 }
3909
3910 if (tsocket_address_is_inet(sconn->remote_address, "ip")) {
3911 remaddr = tsocket_address_inet_addr_string(
3912 sconn->remote_address,
3913 talloc_tos());
3914 if (remaddr == NULL) {
3915 DEBUG(0,("%s: tsocket_address_inet_addr_string remote failed - %s\n",
3916 __location__, strerror(errno)));
3917 exit_server_cleanly("tsocket_address_inet_addr_string remote failed.\n");
3918 }
3919 } else {
3920 remaddr = "0.0.0.0";
3921 }
3922
3923 /* this is needed so that we get decent entries
3924 in smbstatus for port 445 connects */
3925 set_remote_machine_name(remaddr, false);
3926 reload_services(sconn, conn_snum_used, true);
3927 sub_set_socket_ids(remaddr,
3928 sconn->remote_hostname,
3929 locaddr);
3930
3931 if (lp_preload_modules()) {
3932 smb_load_modules(lp_preload_modules());
3933 }
3934
3935 smb_perfcount_init();
3936
3937 if (!init_account_policy()) {
3938 exit_server("Could not open account policy tdb.\n");
3939 }
3940
3941 if (*lp_root_directory(talloc_tos())) {
3942 if (chroot(lp_root_directory(talloc_tos())) != 0) {
3943 DEBUG(0,("Failed to change root to %s\n",
3944 lp_root_directory(talloc_tos())));
3945 exit_server("Failed to chroot()");
3946 }
3947 if (chdir("/") == -1) {
3948 DEBUG(0,("Failed to chdir to / on chroot to %s\n", lp_root_directory(talloc_tos())));
3949 exit_server("Failed to chroot()");
3950 }
3951 DEBUG(0,("Changed root to %s\n", lp_root_directory(talloc_tos())));
3952 }
3953
3954 if (!file_init(sconn)) {
3955 exit_server("file_init() failed");
3956 }
3957
3958 /* Setup oplocks */
3959 if (!init_oplocks(sconn))
3960 exit_server("Failed to init oplocks");
3961
3962 /* register our message handlers */
3963 messaging_register(sconn->msg_ctx, sconn,
3964 MSG_SMB_FORCE_TDIS, msg_force_tdis);
3965 messaging_register(sconn->msg_ctx, sconn,
3966 MSG_SMB_CLOSE_FILE, msg_close_file);
3967 messaging_register(sconn->msg_ctx, sconn,
3968 MSG_SMB_FILE_RENAME, msg_file_was_renamed);
3969
3970 id_cache_register_msgs(sconn->msg_ctx);
3971 messaging_deregister(sconn->msg_ctx, ID_CACHE_KILL, NULL);
3972 messaging_register(sconn->msg_ctx, sconn,
3973 ID_CACHE_KILL, smbd_id_cache_kill);
3974
3975 messaging_deregister(sconn->msg_ctx,
3976 MSG_SMB_CONF_UPDATED, sconn->ev_ctx);
3977 messaging_register(sconn->msg_ctx, sconn,
3978 MSG_SMB_CONF_UPDATED, smbd_conf_updated);
3979
3980 messaging_deregister(sconn->msg_ctx, MSG_SMB_KILL_CLIENT_IP,
3981 NULL);
3982 messaging_register(sconn->msg_ctx, sconn,
3983 MSG_SMB_KILL_CLIENT_IP,
3984 msg_kill_client_ip);
3985
3986 messaging_deregister(sconn->msg_ctx, MSG_SMB_TELL_NUM_CHILDREN, NULL);
3987
3988 /*
3989 * Use the default MSG_DEBUG handler to avoid rebroadcasting
3990 * MSGs to all child processes
3991 */
3992 messaging_deregister(sconn->msg_ctx,
3993 MSG_DEBUG, NULL);
3994 messaging_register(sconn->msg_ctx, NULL,
3995 MSG_DEBUG, debug_message);
3996
3997 if ((lp_keepalive() != 0)
3998 && !(event_add_idle(ev_ctx, NULL,
3999 timeval_set(lp_keepalive(), 0),
4000 "keepalive", keepalive_fn,
4001 sconn))) {
4002 DEBUG(0, ("Could not add keepalive event\n"));
4003 exit(1);
4004 }
4005
4006 if (!(event_add_idle(ev_ctx, NULL,
4007 timeval_set(IDLE_CLOSED_TIMEOUT, 0),
4008 "deadtime", deadtime_fn, sconn))) {
4009 DEBUG(0, ("Could not add deadtime event\n"));
4010 exit(1);
4011 }
4012
4013 if (!(event_add_idle(ev_ctx, NULL,
4014 timeval_set(SMBD_HOUSEKEEPING_INTERVAL, 0),
4015 "housekeeping", housekeeping_fn, sconn))) {
4016 DEBUG(0, ("Could not add housekeeping event\n"));
4017 exit(1);
4018 }
4019
4020 smbprofile_dump_setup(ev_ctx);
4021
4022 if (!init_dptrs(sconn)) {
4023 exit_server("init_dptrs() failed");
4024 }
4025
4026 TALLOC_FREE(trace_state.frame);
4027
4028 tevent_set_trace_callback(ev_ctx, smbd_tevent_trace_callback,
4029 &trace_state);
4030
4031 ret = tevent_loop_wait(ev_ctx);
4032 if (ret != 0) {
4033 DEBUG(1, ("tevent_loop_wait failed: %d, %s,"
4034 " exiting\n", ret, strerror(errno)));
4035 }
4036
4037 TALLOC_FREE(trace_state.frame);
4038
4039 exit_server_cleanly(NULL);
4040 }
4041
4042 bool req_is_in_chain(const struct smb_request *req)
4043 {
4044 if (req->vwv != (const uint16_t *)(req->inbuf+smb_vwv)) {
4045 /*
4046 * We're right now handling a subsequent request, so we must
4047 * be in a chain
4048 */
4049 return true;
4050 }
4051
4052 if (!is_andx_req(req->cmd)) {
4053 return false;
4054 }
4055
4056 if (req->wct < 2) {
4057 /*
4058 * Okay, an illegal request, but definitely not chained :-)
4059 */
4060 return false;
4061 }
4062
4063 return (CVAL(req->vwv+0, 0) != 0xFF);
4064 }
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