2 Unix SMB/CIFS implementation.
5 Copyright (C) Stefan Metzmacher 2009
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.
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.
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/>.
22 #include "smbd/smbd.h"
23 #include "smbd/globals.h"
24 #include "../libcli/smb/smb_common.h"
25 #include "../libcli/security/security.h"
27 #include "lib/param/loadparm.h"
28 #include "../lib/util/tevent_ntstatus.h"
31 #define DBGC_CLASS DBGC_SMB2
33 static struct tevent_req *smbd_smb2_tree_connect_send(TALLOC_CTX *mem_ctx,
34 struct tevent_context *ev,
35 struct smbd_smb2_request *smb2req,
37 static NTSTATUS smbd_smb2_tree_connect_recv(struct tevent_req *req,
38 uint8_t *out_share_type,
39 uint32_t *out_share_flags,
40 uint32_t *out_capabilities,
41 uint32_t *out_maximal_access,
42 uint32_t *out_tree_id,
45 static void smbd_smb2_request_tcon_done(struct tevent_req *subreq);
47 NTSTATUS smbd_smb2_request_process_tcon(struct smbd_smb2_request *req)
49 const uint8_t *inbody;
50 uint16_t in_path_offset;
51 uint16_t in_path_length;
52 DATA_BLOB in_path_buffer;
54 size_t in_path_string_size;
57 struct tevent_req *subreq;
59 status = smbd_smb2_request_verify_sizes(req, 0x09);
60 if (!NT_STATUS_IS_OK(status)) {
61 return smbd_smb2_request_error(req, status);
63 inbody = SMBD_SMB2_IN_BODY_PTR(req);
65 in_path_offset = SVAL(inbody, 0x04);
66 in_path_length = SVAL(inbody, 0x06);
68 if (in_path_offset != (SMB2_HDR_BODY + SMBD_SMB2_IN_BODY_LEN(req))) {
69 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
72 if (in_path_length > SMBD_SMB2_IN_DYN_LEN(req)) {
73 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
76 in_path_buffer.data = SMBD_SMB2_IN_DYN_PTR(req);
77 in_path_buffer.length = in_path_length;
79 ok = convert_string_talloc(req, CH_UTF16, CH_UNIX,
81 in_path_buffer.length,
83 &in_path_string_size);
85 return smbd_smb2_request_error(req, NT_STATUS_ILLEGAL_CHARACTER);
88 if (in_path_buffer.length == 0) {
89 in_path_string_size = 0;
92 if (strlen(in_path_string) != in_path_string_size) {
93 return smbd_smb2_request_error(req, NT_STATUS_BAD_NETWORK_NAME);
96 subreq = smbd_smb2_tree_connect_send(req,
100 if (subreq == NULL) {
101 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
103 tevent_req_set_callback(subreq, smbd_smb2_request_tcon_done, req);
105 return smbd_smb2_request_pending_queue(req, subreq, 500);
108 static void smbd_smb2_request_tcon_done(struct tevent_req *subreq)
110 struct smbd_smb2_request *req =
111 tevent_req_callback_data(subreq,
112 struct smbd_smb2_request);
115 uint8_t out_share_type = 0;
116 uint32_t out_share_flags = 0;
117 uint32_t out_capabilities = 0;
118 uint32_t out_maximal_access = 0;
119 uint32_t out_tree_id = 0;
120 bool disconnect = false;
124 status = smbd_smb2_tree_connect_recv(subreq,
132 if (!NT_STATUS_IS_OK(status)) {
134 smbd_server_connection_terminate(req->xconn,
138 error = smbd_smb2_request_error(req, status);
139 if (!NT_STATUS_IS_OK(error)) {
140 smbd_server_connection_terminate(req->xconn,
147 outhdr = SMBD_SMB2_OUT_HDR_PTR(req);
149 outbody = smbd_smb2_generate_outbody(req, 0x10);
150 if (outbody.data == NULL) {
151 error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
152 if (!NT_STATUS_IS_OK(error)) {
153 smbd_server_connection_terminate(req->xconn,
160 SIVAL(outhdr, SMB2_HDR_TID, out_tree_id);
162 SSVAL(outbody.data, 0x00, 0x10); /* struct size */
163 SCVAL(outbody.data, 0x02,
164 out_share_type); /* share type */
165 SCVAL(outbody.data, 0x03, 0); /* reserved */
166 SIVAL(outbody.data, 0x04,
167 out_share_flags); /* share flags */
168 SIVAL(outbody.data, 0x08,
169 out_capabilities); /* capabilities */
170 SIVAL(outbody.data, 0x0C,
171 out_maximal_access); /* maximal access */
173 error = smbd_smb2_request_done(req, outbody, NULL);
174 if (!NT_STATUS_IS_OK(error)) {
175 smbd_server_connection_terminate(req->xconn,
181 static NTSTATUS smbd_smb2_tree_connect(struct smbd_smb2_request *req,
183 uint8_t *out_share_type,
184 uint32_t *out_share_flags,
185 uint32_t *out_capabilities,
186 uint32_t *out_maximal_access,
187 uint32_t *out_tree_id,
190 struct smbXsrv_connection *conn = req->xconn;
191 const char *share = in_path;
192 char *service = NULL;
194 struct smbXsrv_tcon *tcon;
195 NTTIME now = timeval_to_nttime(&req->request_time);
196 connection_struct *compat_conn = NULL;
197 struct user_struct *compat_vuser = req->session->compat;
199 bool encryption_desired = req->session->global->encryption_flags & SMBXSRV_ENCRYPTION_DESIRED;
200 bool encryption_required = req->session->global->encryption_flags & SMBXSRV_ENCRYPTION_REQUIRED;
201 bool guest_session = false;
202 bool require_signed_tcon = false;
206 if (strncmp(share, "\\\\", 2) == 0) {
207 const char *p = strchr(share+2, '\\');
213 DEBUG(10,("smbd_smb2_tree_connect: path[%s] share[%s]\n",
216 if (security_session_user_level(compat_vuser->session_info, NULL) < SECURITY_USER) {
217 guest_session = true;
220 if (conn->protocol >= PROTOCOL_SMB3_11 && !guest_session) {
221 require_signed_tcon = true;
224 if (require_signed_tcon && !req->do_encryption && !req->do_signing) {
225 DEBUG(1, ("smbd_smb2_tree_connect: reject request to share "
226 "[%s] as '%s\\%s' without encryption or signing. "
229 req->session->global->auth_session_info->info->domain_name,
230 req->session->global->auth_session_info->info->account_name));
232 return NT_STATUS_ACCESS_DENIED;
235 service = talloc_strdup(talloc_tos(), share);
237 return NT_STATUS_NO_MEMORY;
240 if (!strlower_m(service)) {
241 DEBUG(2, ("strlower_m %s failed\n", service));
242 return NT_STATUS_INVALID_PARAMETER;
245 /* TODO: do more things... */
246 if (strequal(service,HOMES_NAME)) {
247 if (compat_vuser->homes_snum == -1) {
248 DEBUG(2, ("[homes] share not available for "
249 "user %s because it was not found "
250 "or created at session setup "
252 compat_vuser->session_info->unix_info->unix_name));
253 return NT_STATUS_BAD_NETWORK_NAME;
255 snum = compat_vuser->homes_snum;
256 } else if ((compat_vuser->homes_snum != -1)
258 lp_servicename(talloc_tos(), compat_vuser->homes_snum))) {
259 snum = compat_vuser->homes_snum;
261 snum = find_service(talloc_tos(), service, &service);
263 return NT_STATUS_NO_MEMORY;
268 DEBUG(3,("smbd_smb2_tree_connect: couldn't find service %s\n",
270 return NT_STATUS_BAD_NETWORK_NAME;
273 /* Handle non-DFS clients attempting connections to msdfs proxy */
274 if (lp_host_msdfs()) {
275 char *proxy = lp_msdfs_proxy(talloc_tos(), snum);
277 if ((proxy != NULL) && (*proxy != '\0')) {
278 DBG_NOTICE("refusing connection to dfs proxy share "
279 "'%s' (pointing to %s)\n",
283 return NT_STATUS_BAD_NETWORK_NAME;
288 if ((lp_smb_encrypt(snum) >= SMB_SIGNING_DESIRED) &&
289 (conn->smb2.server.cipher != 0))
291 encryption_desired = true;
294 if (lp_smb_encrypt(snum) == SMB_SIGNING_REQUIRED) {
295 encryption_desired = true;
296 encryption_required = true;
299 if (guest_session && encryption_required) {
300 DEBUG(1,("reject guest as encryption is required for service %s\n",
302 return NT_STATUS_ACCESS_DENIED;
305 if (conn->smb2.server.cipher == 0) {
306 if (encryption_required) {
307 DEBUG(1,("reject tcon with dialect[0x%04X] "
308 "as encryption is required for service %s\n",
309 conn->smb2.server.dialect, service));
310 return NT_STATUS_ACCESS_DENIED;
314 /* create a new tcon as child of the session */
315 status = smb2srv_tcon_create(req->session, now, &tcon);
316 if (!NT_STATUS_IS_OK(status)) {
320 if (encryption_desired) {
321 tcon->global->encryption_flags |= SMBXSRV_ENCRYPTION_DESIRED;
323 if (encryption_required) {
324 tcon->global->encryption_flags |= SMBXSRV_ENCRYPTION_REQUIRED;
327 compat_conn = make_connection_smb2(req,
329 req->session->compat,
332 if (compat_conn == NULL) {
337 tcon->global->share_name = lp_servicename(tcon->global,
339 if (tcon->global->share_name == NULL) {
340 conn_free(compat_conn);
342 return NT_STATUS_NO_MEMORY;
344 tcon->global->session_global_id =
345 req->session->global->session_global_id;
347 tcon->compat = talloc_move(tcon, &compat_conn);
349 tcon->status = NT_STATUS_OK;
351 status = smbXsrv_tcon_update(tcon);
352 if (!NT_STATUS_IS_OK(status)) {
357 if (IS_PRINT(tcon->compat)) {
358 *out_share_type = SMB2_SHARE_TYPE_PRINT;
359 } else if (IS_IPC(tcon->compat)) {
360 *out_share_type = SMB2_SHARE_TYPE_PIPE;
362 *out_share_type = SMB2_SHARE_TYPE_DISK;
365 *out_share_flags = 0;
367 if (lp_msdfs_root(SNUM(tcon->compat)) && lp_host_msdfs()) {
368 *out_share_flags |= (SMB2_SHAREFLAG_DFS|SMB2_SHAREFLAG_DFS_ROOT);
369 *out_capabilities = SMB2_SHARE_CAP_DFS;
371 *out_capabilities = 0;
374 switch(lp_csc_policy(SNUM(tcon->compat))) {
375 case CSC_POLICY_MANUAL:
377 case CSC_POLICY_DOCUMENTS:
378 *out_share_flags |= SMB2_SHAREFLAG_AUTO_CACHING;
380 case CSC_POLICY_PROGRAMS:
381 *out_share_flags |= SMB2_SHAREFLAG_VDO_CACHING;
383 case CSC_POLICY_DISABLE:
384 *out_share_flags |= SMB2_SHAREFLAG_NO_CACHING;
390 if (lp_hide_unreadable(SNUM(tcon->compat)) ||
391 lp_hide_unwriteable_files(SNUM(tcon->compat))) {
392 *out_share_flags |= SMB2_SHAREFLAG_ACCESS_BASED_DIRECTORY_ENUM;
395 if (encryption_desired) {
396 *out_share_flags |= SMB2_SHAREFLAG_ENCRYPT_DATA;
399 *out_maximal_access = tcon->compat->share_access;
401 *out_tree_id = tcon->global->tcon_wire_id;
402 req->last_tid = tcon->global->tcon_wire_id;
407 struct smbd_smb2_tree_connect_state {
409 uint8_t out_share_type;
410 uint32_t out_share_flags;
411 uint32_t out_capabilities;
412 uint32_t out_maximal_access;
413 uint32_t out_tree_id;
417 static struct tevent_req *smbd_smb2_tree_connect_send(TALLOC_CTX *mem_ctx,
418 struct tevent_context *ev,
419 struct smbd_smb2_request *smb2req,
422 struct tevent_req *req;
423 struct smbd_smb2_tree_connect_state *state;
426 req = tevent_req_create(mem_ctx, &state,
427 struct smbd_smb2_tree_connect_state);
431 state->in_path = in_path;
433 status = smbd_smb2_tree_connect(smb2req,
435 &state->out_share_type,
436 &state->out_share_flags,
437 &state->out_capabilities,
438 &state->out_maximal_access,
441 if (tevent_req_nterror(req, status)) {
442 return tevent_req_post(req, ev);
445 tevent_req_done(req);
446 return tevent_req_post(req, ev);
449 static NTSTATUS smbd_smb2_tree_connect_recv(struct tevent_req *req,
450 uint8_t *out_share_type,
451 uint32_t *out_share_flags,
452 uint32_t *out_capabilities,
453 uint32_t *out_maximal_access,
454 uint32_t *out_tree_id,
457 struct smbd_smb2_tree_connect_state *state =
459 struct smbd_smb2_tree_connect_state);
462 if (tevent_req_is_nterror(req, &status)) {
463 tevent_req_received(req);
467 *out_share_type = state->out_share_type;
468 *out_share_flags = state->out_share_flags;
469 *out_capabilities = state->out_capabilities;
470 *out_maximal_access = state->out_maximal_access;
471 *out_tree_id = state->out_tree_id;
472 *disconnect = state->disconnect;
474 tevent_req_received(req);
478 static struct tevent_req *smbd_smb2_tdis_send(TALLOC_CTX *mem_ctx,
479 struct tevent_context *ev,
480 struct smbd_smb2_request *smb2req);
481 static NTSTATUS smbd_smb2_tdis_recv(struct tevent_req *req);
482 static void smbd_smb2_request_tdis_done(struct tevent_req *subreq);
484 NTSTATUS smbd_smb2_request_process_tdis(struct smbd_smb2_request *req)
487 struct tevent_req *subreq = NULL;
489 status = smbd_smb2_request_verify_sizes(req, 0x04);
490 if (!NT_STATUS_IS_OK(status)) {
491 return smbd_smb2_request_error(req, status);
494 subreq = smbd_smb2_tdis_send(req, req->sconn->ev_ctx, req);
495 if (subreq == NULL) {
496 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
498 tevent_req_set_callback(subreq, smbd_smb2_request_tdis_done, req);
501 * Wait a long time before going async on this to allow
502 * requests we're waiting on to finish. Set timeout to 10 secs.
504 return smbd_smb2_request_pending_queue(req, subreq, 10000000);
507 static void smbd_smb2_request_tdis_done(struct tevent_req *subreq)
509 struct smbd_smb2_request *smb2req =
510 tevent_req_callback_data(subreq,
511 struct smbd_smb2_request);
516 status = smbd_smb2_tdis_recv(subreq);
518 if (!NT_STATUS_IS_OK(status)) {
519 error = smbd_smb2_request_error(smb2req, status);
520 if (!NT_STATUS_IS_OK(error)) {
521 smbd_server_connection_terminate(smb2req->xconn,
528 outbody = smbd_smb2_generate_outbody(smb2req, 0x04);
529 if (outbody.data == NULL) {
530 error = smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
531 if (!NT_STATUS_IS_OK(error)) {
532 smbd_server_connection_terminate(smb2req->xconn,
539 SSVAL(outbody.data, 0x00, 0x04); /* struct size */
540 SSVAL(outbody.data, 0x02, 0); /* reserved */
542 error = smbd_smb2_request_done(smb2req, outbody, NULL);
543 if (!NT_STATUS_IS_OK(error)) {
544 smbd_server_connection_terminate(smb2req->xconn,
550 struct smbd_smb2_tdis_state {
551 struct smbd_smb2_request *smb2req;
552 struct tevent_queue *wait_queue;
555 static void smbd_smb2_tdis_wait_done(struct tevent_req *subreq);
557 static struct tevent_req *smbd_smb2_tdis_send(TALLOC_CTX *mem_ctx,
558 struct tevent_context *ev,
559 struct smbd_smb2_request *smb2req)
561 struct tevent_req *req;
562 struct smbd_smb2_tdis_state *state;
563 struct tevent_req *subreq;
564 struct smbXsrv_connection *xconn = NULL;
566 req = tevent_req_create(mem_ctx, &state,
567 struct smbd_smb2_tdis_state);
571 state->smb2req = smb2req;
573 state->wait_queue = tevent_queue_create(state, "tdis_wait_queue");
574 if (tevent_req_nomem(state->wait_queue, req)) {
575 return tevent_req_post(req, ev);
579 * Make sure that no new request will be able to use this tcon.
581 smb2req->tcon->status = NT_STATUS_NETWORK_NAME_DELETED;
583 xconn = smb2req->xconn->client->connections;
584 for (; xconn != NULL; xconn = xconn->next) {
585 struct smbd_smb2_request *preq;
587 for (preq = xconn->smb2.requests; preq != NULL; preq = preq->next) {
588 if (preq == smb2req) {
589 /* Can't cancel current request. */
592 if (preq->tcon != smb2req->tcon) {
593 /* Request on different tcon. */
598 * Never cancel anything in a compound
599 * request. Way too hard to deal with
602 if (!preq->compound_related && preq->subreq != NULL) {
603 tevent_req_cancel(preq->subreq);
607 * Now wait until the request is finished.
609 * We don't set a callback, as we just want to block the
610 * wait queue and the talloc_free() of the request will
611 * remove the item from the wait queue.
613 subreq = tevent_queue_wait_send(preq, ev, state->wait_queue);
614 if (tevent_req_nomem(subreq, req)) {
615 return tevent_req_post(req, ev);
621 * Now we add our own waiter to the end of the queue,
622 * this way we get notified when all pending requests are finished
623 * and send to the socket.
625 subreq = tevent_queue_wait_send(state, ev, state->wait_queue);
626 if (tevent_req_nomem(subreq, req)) {
627 return tevent_req_post(req, ev);
629 tevent_req_set_callback(subreq, smbd_smb2_tdis_wait_done, req);
634 static void smbd_smb2_tdis_wait_done(struct tevent_req *subreq)
636 struct tevent_req *req = tevent_req_callback_data(
637 subreq, struct tevent_req);
638 struct smbd_smb2_tdis_state *state = tevent_req_data(
639 req, struct smbd_smb2_tdis_state);
642 tevent_queue_wait_recv(subreq);
646 * As we've been awoken, we may have changed
647 * uid in the meantime. Ensure we're still
648 * root (SMB2_OP_TDIS has .as_root = true).
650 change_to_root_user();
652 status = smbXsrv_tcon_disconnect(state->smb2req->tcon,
653 state->smb2req->tcon->compat->vuid);
654 if (tevent_req_nterror(req, status)) {
658 /* We did tear down the tcon. */
659 TALLOC_FREE(state->smb2req->tcon);
660 tevent_req_done(req);
663 static NTSTATUS smbd_smb2_tdis_recv(struct tevent_req *req)
665 return tevent_req_simple_recv_ntstatus(req);