2 Unix SMB/CIFS implementation.
5 Copyright (C) Stefan Metzmacher 2009
6 Copyright (C) Jeremy Allison 2010
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 #include "smbd/smbd.h"
24 #include "smbd/globals.h"
25 #include "../libcli/smb/smb_common.h"
26 #include "../auth/gensec/gensec.h"
28 #include "../lib/tsocket/tsocket.h"
29 #include "../libcli/security/security.h"
30 #include "../lib/util/tevent_ntstatus.h"
32 static struct tevent_req *smbd_smb2_session_setup_send(TALLOC_CTX *mem_ctx,
33 struct tevent_context *ev,
34 struct smbd_smb2_request *smb2req,
35 uint64_t in_session_id,
37 uint8_t in_security_mode,
38 uint64_t in_previous_session_id,
39 DATA_BLOB in_security_buffer);
40 static NTSTATUS smbd_smb2_session_setup_recv(struct tevent_req *req,
41 uint16_t *out_session_flags,
43 DATA_BLOB *out_security_buffer,
44 uint64_t *out_session_id);
46 static void smbd_smb2_request_sesssetup_done(struct tevent_req *subreq);
48 NTSTATUS smbd_smb2_request_process_sesssetup(struct smbd_smb2_request *smb2req)
51 const uint8_t *inbody;
52 uint64_t in_session_id;
54 uint8_t in_security_mode;
55 uint64_t in_previous_session_id;
56 uint16_t in_security_offset;
57 uint16_t in_security_length;
58 DATA_BLOB in_security_buffer;
60 struct tevent_req *subreq;
62 status = smbd_smb2_request_verify_sizes(smb2req, 0x19);
63 if (!NT_STATUS_IS_OK(status)) {
64 return smbd_smb2_request_error(smb2req, status);
66 inhdr = SMBD_SMB2_IN_HDR_PTR(smb2req);
67 inbody = SMBD_SMB2_IN_BODY_PTR(smb2req);
69 in_session_id = BVAL(inhdr, SMB2_HDR_SESSION_ID);
71 in_flags = CVAL(inbody, 0x02);
72 in_security_mode = CVAL(inbody, 0x03);
73 /* Capabilities = IVAL(inbody, 0x04) */
74 /* Channel = IVAL(inbody, 0x08) */
75 in_security_offset = SVAL(inbody, 0x0C);
76 in_security_length = SVAL(inbody, 0x0E);
77 in_previous_session_id = BVAL(inbody, 0x10);
79 if (in_security_offset != (SMB2_HDR_BODY + SMBD_SMB2_IN_BODY_LEN(smb2req))) {
80 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
83 if (in_security_length > SMBD_SMB2_IN_DYN_LEN(smb2req)) {
84 return smbd_smb2_request_error(smb2req, NT_STATUS_INVALID_PARAMETER);
87 in_security_buffer.data = SMBD_SMB2_IN_DYN_PTR(smb2req);
88 in_security_buffer.length = in_security_length;
90 subreq = smbd_smb2_session_setup_send(smb2req,
91 smb2req->sconn->ev_ctx,
96 in_previous_session_id,
99 return smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
101 tevent_req_set_callback(subreq, smbd_smb2_request_sesssetup_done, smb2req);
103 return smbd_smb2_request_pending_queue(smb2req, subreq, 500);
106 static void smbd_smb2_request_sesssetup_done(struct tevent_req *subreq)
108 struct smbd_smb2_request *smb2req =
109 tevent_req_callback_data(subreq,
110 struct smbd_smb2_request);
114 uint16_t out_session_flags = 0;
115 uint64_t out_session_id = 0;
116 uint16_t out_security_offset;
117 DATA_BLOB out_security_buffer = data_blob_null;
119 NTSTATUS error; /* transport error */
121 status = smbd_smb2_session_setup_recv(subreq,
124 &out_security_buffer,
127 if (!NT_STATUS_IS_OK(status) &&
128 !NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
129 status = nt_status_squash(status);
130 error = smbd_smb2_request_error(smb2req, status);
131 if (!NT_STATUS_IS_OK(error)) {
132 smbd_server_connection_terminate(smb2req->xconn,
139 out_security_offset = SMB2_HDR_BODY + 0x08;
141 outhdr = SMBD_SMB2_OUT_HDR_PTR(smb2req);
143 outbody = smbd_smb2_generate_outbody(smb2req, 0x08);
144 if (outbody.data == NULL) {
145 error = smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
146 if (!NT_STATUS_IS_OK(error)) {
147 smbd_server_connection_terminate(smb2req->xconn,
154 SBVAL(outhdr, SMB2_HDR_SESSION_ID, out_session_id);
156 SSVAL(outbody.data, 0x00, 0x08 + 1); /* struct size */
157 SSVAL(outbody.data, 0x02,
158 out_session_flags); /* session flags */
159 SSVAL(outbody.data, 0x04,
160 out_security_offset); /* security buffer offset */
161 SSVAL(outbody.data, 0x06,
162 out_security_buffer.length); /* security buffer length */
164 outdyn = out_security_buffer;
166 error = smbd_smb2_request_done_ex(smb2req, status, outbody, &outdyn,
168 if (!NT_STATUS_IS_OK(error)) {
169 smbd_server_connection_terminate(smb2req->xconn,
175 static NTSTATUS smbd_smb2_auth_generic_return(struct smbXsrv_session *session,
176 struct smbd_smb2_request *smb2req,
177 uint8_t in_security_mode,
178 struct auth_session_info *session_info,
179 uint16_t *out_session_flags,
180 uint64_t *out_session_id)
184 uint8_t session_key[16];
185 struct smbXsrv_session *x = session;
186 struct smbXsrv_connection *xconn = smb2req->xconn;
188 if ((in_security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) ||
189 lp_server_signing() == SMB_SIGNING_REQUIRED) {
190 x->global->signing_required = true;
193 if (lp_smb_encrypt(-1) == SMB_SIGNING_REQUIRED) {
194 x->global->encryption_required = true;
197 if (security_session_user_level(session_info, NULL) < SECURITY_USER) {
198 /* we map anonymous to guest internally */
199 *out_session_flags |= SMB2_SESSION_FLAG_IS_GUEST;
200 *out_session_flags |= SMB2_SESSION_FLAG_IS_NULL;
201 /* force no signing */
202 x->global->signing_required = false;
206 if (guest && x->global->encryption_required) {
207 DEBUG(1,("reject guest session as encryption is required\n"));
208 return NT_STATUS_ACCESS_DENIED;
211 if (!(xconn->smb2.server.capabilities & SMB2_CAP_ENCRYPTION)) {
212 if (x->global->encryption_required) {
213 DEBUG(1,("reject session with dialect[0x%04X] "
214 "as encryption is required\n",
215 xconn->smb2.server.dialect));
216 return NT_STATUS_ACCESS_DENIED;
220 if (x->global->encryption_required) {
221 *out_session_flags |= SMB2_SESSION_FLAG_ENCRYPT_DATA;
224 ZERO_STRUCT(session_key);
225 memcpy(session_key, session_info->session_key.data,
226 MIN(session_info->session_key.length, sizeof(session_key)));
228 x->global->signing_key = data_blob_talloc(x->global,
230 sizeof(session_key));
231 if (x->global->signing_key.data == NULL) {
232 ZERO_STRUCT(session_key);
233 return NT_STATUS_NO_MEMORY;
236 if (xconn->protocol >= PROTOCOL_SMB2_24) {
237 const DATA_BLOB label = data_blob_string_const_null("SMB2AESCMAC");
238 const DATA_BLOB context = data_blob_string_const_null("SmbSign");
240 smb2_key_derivation(session_key, sizeof(session_key),
241 label.data, label.length,
242 context.data, context.length,
243 x->global->signing_key.data);
246 if (xconn->protocol >= PROTOCOL_SMB2_24) {
247 const DATA_BLOB label = data_blob_string_const_null("SMB2AESCCM");
248 const DATA_BLOB context = data_blob_string_const_null("ServerIn ");
250 x->global->decryption_key = data_blob_talloc(x->global,
252 sizeof(session_key));
253 if (x->global->decryption_key.data == NULL) {
254 ZERO_STRUCT(session_key);
255 return NT_STATUS_NO_MEMORY;
258 smb2_key_derivation(session_key, sizeof(session_key),
259 label.data, label.length,
260 context.data, context.length,
261 x->global->decryption_key.data);
264 if (xconn->protocol >= PROTOCOL_SMB2_24) {
265 const DATA_BLOB label = data_blob_string_const_null("SMB2AESCCM");
266 const DATA_BLOB context = data_blob_string_const_null("ServerOut");
268 x->global->encryption_key = data_blob_talloc(x->global,
270 sizeof(session_key));
271 if (x->global->encryption_key.data == NULL) {
272 ZERO_STRUCT(session_key);
273 return NT_STATUS_NO_MEMORY;
276 smb2_key_derivation(session_key, sizeof(session_key),
277 label.data, label.length,
278 context.data, context.length,
279 x->global->encryption_key.data);
281 generate_random_buffer((uint8_t *)&x->nonce_high, sizeof(x->nonce_high));
285 x->global->application_key = data_blob_dup_talloc(x->global,
286 x->global->signing_key);
287 if (x->global->application_key.data == NULL) {
288 ZERO_STRUCT(session_key);
289 return NT_STATUS_NO_MEMORY;
292 if (xconn->protocol >= PROTOCOL_SMB2_24) {
293 const DATA_BLOB label = data_blob_string_const_null("SMB2APP");
294 const DATA_BLOB context = data_blob_string_const_null("SmbRpc");
296 smb2_key_derivation(session_key, sizeof(session_key),
297 label.data, label.length,
298 context.data, context.length,
299 x->global->application_key.data);
301 ZERO_STRUCT(session_key);
303 x->global->channels[0].signing_key = data_blob_dup_talloc(x->global->channels,
304 x->global->signing_key);
305 if (x->global->channels[0].signing_key.data == NULL) {
306 return NT_STATUS_NO_MEMORY;
309 data_blob_clear_free(&session_info->session_key);
310 session_info->session_key = data_blob_dup_talloc(session_info,
311 x->global->application_key);
312 if (session_info->session_key.data == NULL) {
313 return NT_STATUS_NO_MEMORY;
316 session->compat = talloc_zero(session, struct user_struct);
317 if (session->compat == NULL) {
318 return NT_STATUS_NO_MEMORY;
320 session->compat->session = session;
321 session->compat->homes_snum = -1;
322 session->compat->session_info = session_info;
323 session->compat->session_keystr = NULL;
324 session->compat->vuid = session->global->session_wire_id;
325 DLIST_ADD(smb2req->sconn->users, session->compat);
326 smb2req->sconn->num_users++;
328 if (security_session_user_level(session_info, NULL) >= SECURITY_USER) {
329 session->compat->homes_snum =
330 register_homes_share(session_info->unix_info->unix_name);
333 set_current_user_info(session_info->unix_info->sanitized_username,
334 session_info->unix_info->unix_name,
335 session_info->info->domain_name);
337 reload_services(smb2req->sconn, conn_snum_used, true);
339 session->status = NT_STATUS_OK;
340 session->global->auth_session_info = session_info;
341 session->global->auth_session_info_seqnum += 1;
342 session->global->channels[0].auth_session_info_seqnum =
343 session->global->auth_session_info_seqnum;
344 session->global->auth_time = timeval_to_nttime(&smb2req->request_time);
345 session->global->expiration_time = gensec_expire_time(session->gensec);
347 if (!session_claim(session)) {
348 DEBUG(1, ("smb2: Failed to claim session "
350 (unsigned long long)session->compat->vuid));
351 return NT_STATUS_LOGON_FAILURE;
354 status = smbXsrv_session_update(session);
355 if (!NT_STATUS_IS_OK(status)) {
356 DEBUG(0, ("smb2: Failed to update session for vuid=%llu - %s\n",
357 (unsigned long long)session->compat->vuid,
359 return NT_STATUS_LOGON_FAILURE;
363 * we attach the session to the request
364 * so that the response can be signed
366 smb2req->session = session;
368 smb2req->do_signing = true;
371 global_client_caps |= (CAP_LEVEL_II_OPLOCKS|CAP_STATUS32);
373 *out_session_id = session->global->session_wire_id;
378 static NTSTATUS smbd_smb2_reauth_generic_return(struct smbXsrv_session *session,
379 struct smbd_smb2_request *smb2req,
380 struct auth_session_info *session_info,
381 uint16_t *out_session_flags,
382 uint64_t *out_session_id)
385 struct smbXsrv_session *x = session;
386 struct smbXsrv_connection *xconn = smb2req->xconn;
388 data_blob_clear_free(&session_info->session_key);
389 session_info->session_key = data_blob_dup_talloc(session_info,
390 x->global->application_key);
391 if (session_info->session_key.data == NULL) {
392 return NT_STATUS_NO_MEMORY;
395 session->compat->session_info = session_info;
396 session->compat->vuid = session->global->session_wire_id;
398 session->compat->homes_snum =
399 register_homes_share(session_info->unix_info->unix_name);
401 set_current_user_info(session_info->unix_info->sanitized_username,
402 session_info->unix_info->unix_name,
403 session_info->info->domain_name);
405 reload_services(smb2req->sconn, conn_snum_used, true);
407 session->status = NT_STATUS_OK;
408 TALLOC_FREE(session->global->auth_session_info);
409 session->global->auth_session_info = session_info;
410 session->global->auth_session_info_seqnum += 1;
411 session->global->channels[0].auth_session_info_seqnum =
412 session->global->auth_session_info_seqnum;
413 session->global->auth_time = timeval_to_nttime(&smb2req->request_time);
414 session->global->expiration_time = gensec_expire_time(session->gensec);
416 status = smbXsrv_session_update(session);
417 if (!NT_STATUS_IS_OK(status)) {
418 DEBUG(0, ("smb2: Failed to update session for vuid=%llu - %s\n",
419 (unsigned long long)session->compat->vuid,
421 return NT_STATUS_LOGON_FAILURE;
424 conn_clear_vuid_caches(xconn->sconn, session->compat->vuid);
426 *out_session_id = session->global->session_wire_id;
431 struct smbd_smb2_session_setup_state {
432 struct tevent_context *ev;
433 struct smbd_smb2_request *smb2req;
434 uint64_t in_session_id;
436 uint8_t in_security_mode;
437 uint64_t in_previous_session_id;
438 DATA_BLOB in_security_buffer;
439 struct smbXsrv_session *session;
440 struct auth_session_info *session_info;
441 uint16_t out_session_flags;
442 DATA_BLOB out_security_buffer;
443 uint64_t out_session_id;
444 /* The following pointer is owned by state->session. */
445 struct smbd_smb2_session_setup_state **pp_self_ref;
448 static int pp_self_ref_destructor(struct smbd_smb2_session_setup_state **pp_state)
450 (*pp_state)->session = NULL;
452 * To make things clearer, ensure the pp_self_ref
453 * pointer is nulled out. We're never going to
456 (*pp_state)->pp_self_ref = NULL;
460 static int smbd_smb2_session_setup_state_destructor(struct smbd_smb2_session_setup_state *state)
462 struct smbXsrv_connection *xconn;
463 struct smbd_smb2_request *preq;
466 * If state->session is not NULL,
467 * we move the session from the session table to the request on failure
468 * so that the error response can be correctly signed, but the session
469 * is then really deleted when the request is done.
472 if (state->session == NULL) {
476 state->session->status = NT_STATUS_USER_SESSION_DELETED;
477 state->smb2req->session = talloc_move(state->smb2req, &state->session);
480 * We own the session now - we don't need the
481 * tag talloced on session that keeps track of session independently.
483 TALLOC_FREE(state->pp_self_ref);
486 * We've made this session owned by the current request.
487 * Ensure that any outstanding requests don't also refer
490 xconn = state->smb2req->xconn;
492 for (preq = xconn->smb2.requests; preq != NULL; preq = preq->next) {
493 if (preq == state->smb2req) {
496 if (preq->session == state->smb2req->session) {
497 preq->session = NULL;
499 * If we no longer have a session we can't
500 * sign or encrypt replies.
502 preq->do_signing = false;
503 preq->do_encryption = false;
510 static void smbd_smb2_session_setup_gensec_done(struct tevent_req *subreq);
511 static void smbd_smb2_session_setup_previous_done(struct tevent_req *subreq);
512 static void smbd_smb2_session_setup_auth_return(struct tevent_req *req);
514 /************************************************************************
515 We have to tag the state->session pointer with memory talloc'ed
516 on it to ensure it gets NULL'ed out if the underlying struct smbXsrv_session
517 is deleted by shutdown whilst this request is in flight.
518 ************************************************************************/
520 static NTSTATUS tag_state_session_ptr(struct smbd_smb2_session_setup_state *state)
522 state->pp_self_ref = talloc_zero(state->session,
523 struct smbd_smb2_session_setup_state *);
524 if (state->pp_self_ref == NULL) {
525 return NT_STATUS_NO_MEMORY;
527 *state->pp_self_ref = state;
528 talloc_set_destructor(state->pp_self_ref, pp_self_ref_destructor);
532 static struct tevent_req *smbd_smb2_session_setup_send(TALLOC_CTX *mem_ctx,
533 struct tevent_context *ev,
534 struct smbd_smb2_request *smb2req,
535 uint64_t in_session_id,
537 uint8_t in_security_mode,
538 uint64_t in_previous_session_id,
539 DATA_BLOB in_security_buffer)
541 struct tevent_req *req;
542 struct smbd_smb2_session_setup_state *state;
544 NTTIME now = timeval_to_nttime(&smb2req->request_time);
545 struct tevent_req *subreq;
547 req = tevent_req_create(mem_ctx, &state,
548 struct smbd_smb2_session_setup_state);
553 state->smb2req = smb2req;
554 state->in_session_id = in_session_id;
555 state->in_flags = in_flags;
556 state->in_security_mode = in_security_mode;
557 state->in_previous_session_id = in_previous_session_id;
558 state->in_security_buffer = in_security_buffer;
560 if (in_flags & SMB2_SESSION_FLAG_BINDING) {
561 if (smb2req->xconn->protocol < PROTOCOL_SMB2_22) {
562 tevent_req_nterror(req, NT_STATUS_REQUEST_NOT_ACCEPTED);
563 return tevent_req_post(req, ev);
567 * We do not support multi channel.
569 tevent_req_nterror(req, NT_STATUS_NOT_SUPPORTED);
570 return tevent_req_post(req, ev);
573 talloc_set_destructor(state, smbd_smb2_session_setup_state_destructor);
575 if (state->in_session_id == 0) {
576 /* create a new session */
577 status = smbXsrv_session_create(state->smb2req->xconn,
578 now, &state->session);
579 if (tevent_req_nterror(req, status)) {
580 return tevent_req_post(req, ev);
583 status = smb2srv_session_lookup(state->smb2req->xconn,
584 state->in_session_id, now,
586 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED)) {
587 status = NT_STATUS_OK;
589 if (NT_STATUS_IS_OK(status)) {
590 state->session->status = NT_STATUS_MORE_PROCESSING_REQUIRED;
591 status = NT_STATUS_MORE_PROCESSING_REQUIRED;
592 TALLOC_FREE(state->session->gensec);
594 if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
595 tevent_req_nterror(req, status);
596 return tevent_req_post(req, ev);
600 status = tag_state_session_ptr(state);
601 if (tevent_req_nterror(req, status)) {
602 return tevent_req_post(req, ev);
605 if (state->session->gensec == NULL) {
606 status = auth_generic_prepare(state->session,
607 state->smb2req->xconn->remote_address,
608 &state->session->gensec);
609 if (tevent_req_nterror(req, status)) {
610 return tevent_req_post(req, ev);
613 gensec_want_feature(state->session->gensec, GENSEC_FEATURE_SESSION_KEY);
614 gensec_want_feature(state->session->gensec, GENSEC_FEATURE_UNIX_TOKEN);
616 status = gensec_start_mech_by_oid(state->session->gensec,
618 if (tevent_req_nterror(req, status)) {
619 return tevent_req_post(req, ev);
624 subreq = gensec_update_send(state, state->ev,
625 state->session->gensec,
626 state->in_security_buffer);
628 if (tevent_req_nomem(subreq, req)) {
629 return tevent_req_post(req, ev);
631 tevent_req_set_callback(subreq, smbd_smb2_session_setup_gensec_done, req);
636 static void smbd_smb2_session_setup_gensec_done(struct tevent_req *subreq)
638 struct tevent_req *req =
639 tevent_req_callback_data(subreq,
641 struct smbd_smb2_session_setup_state *state =
643 struct smbd_smb2_session_setup_state);
647 status = gensec_update_recv(subreq, state,
648 &state->out_security_buffer);
651 if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED) &&
652 !NT_STATUS_IS_OK(status)) {
653 tevent_req_nterror(req, status);
657 if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
658 state->out_session_id = state->session->global->session_wire_id;
659 /* we want to keep the session */
660 state->session = NULL;
661 TALLOC_FREE(state->pp_self_ref);
662 tevent_req_nterror(req, status);
666 status = gensec_session_info(state->session->gensec,
667 state->session->global,
668 &state->session_info);
669 if (tevent_req_nterror(req, status)) {
673 if ((state->in_previous_session_id != 0) &&
674 (state->session->global->session_wire_id !=
675 state->in_previous_session_id))
677 subreq = smb2srv_session_close_previous_send(state, state->ev,
678 state->smb2req->xconn,
680 state->in_previous_session_id,
681 state->session->global->session_wire_id);
682 if (tevent_req_nomem(subreq, req)) {
685 tevent_req_set_callback(subreq,
686 smbd_smb2_session_setup_previous_done,
691 smbd_smb2_session_setup_auth_return(req);
694 static void smbd_smb2_session_setup_previous_done(struct tevent_req *subreq)
696 struct tevent_req *req =
697 tevent_req_callback_data(subreq,
701 status = smb2srv_session_close_previous_recv(subreq);
703 if (tevent_req_nterror(req, status)) {
707 smbd_smb2_session_setup_auth_return(req);
710 static void smbd_smb2_session_setup_auth_return(struct tevent_req *req)
712 struct smbd_smb2_session_setup_state *state =
714 struct smbd_smb2_session_setup_state);
717 if (state->session->global->auth_session_info != NULL) {
718 status = smbd_smb2_reauth_generic_return(state->session,
721 &state->out_session_flags,
722 &state->out_session_id);
723 if (tevent_req_nterror(req, status)) {
726 /* we want to keep the session */
727 state->session = NULL;
728 TALLOC_FREE(state->pp_self_ref);
729 tevent_req_done(req);
733 status = smbd_smb2_auth_generic_return(state->session,
735 state->in_security_mode,
737 &state->out_session_flags,
738 &state->out_session_id);
739 if (tevent_req_nterror(req, status)) {
743 /* we want to keep the session */
744 state->session = NULL;
745 TALLOC_FREE(state->pp_self_ref);
746 tevent_req_done(req);
750 static NTSTATUS smbd_smb2_session_setup_recv(struct tevent_req *req,
751 uint16_t *out_session_flags,
753 DATA_BLOB *out_security_buffer,
754 uint64_t *out_session_id)
756 struct smbd_smb2_session_setup_state *state =
758 struct smbd_smb2_session_setup_state);
761 if (tevent_req_is_nterror(req, &status)) {
762 if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
763 tevent_req_received(req);
764 return nt_status_squash(status);
767 status = NT_STATUS_OK;
770 *out_session_flags = state->out_session_flags;
771 *out_security_buffer = state->out_security_buffer;
772 *out_session_id = state->out_session_id;
774 talloc_steal(mem_ctx, out_security_buffer->data);
775 tevent_req_received(req);
779 static struct tevent_req *smbd_smb2_logoff_send(TALLOC_CTX *mem_ctx,
780 struct tevent_context *ev,
781 struct smbd_smb2_request *smb2req);
782 static NTSTATUS smbd_smb2_logoff_recv(struct tevent_req *req);
783 static void smbd_smb2_request_logoff_done(struct tevent_req *subreq);
785 NTSTATUS smbd_smb2_request_process_logoff(struct smbd_smb2_request *req)
788 struct tevent_req *subreq = NULL;
790 status = smbd_smb2_request_verify_sizes(req, 0x04);
791 if (!NT_STATUS_IS_OK(status)) {
792 return smbd_smb2_request_error(req, status);
795 subreq = smbd_smb2_logoff_send(req, req->sconn->ev_ctx, req);
796 if (subreq == NULL) {
797 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
799 tevent_req_set_callback(subreq, smbd_smb2_request_logoff_done, req);
802 * Wait a long time before going async on this to allow
803 * requests we're waiting on to finish. Set timeout to 10 secs.
805 return smbd_smb2_request_pending_queue(req, subreq, 10000000);
808 static void smbd_smb2_request_logoff_done(struct tevent_req *subreq)
810 struct smbd_smb2_request *smb2req =
811 tevent_req_callback_data(subreq,
812 struct smbd_smb2_request);
817 status = smbd_smb2_logoff_recv(subreq);
819 if (!NT_STATUS_IS_OK(status)) {
820 error = smbd_smb2_request_error(smb2req, status);
821 if (!NT_STATUS_IS_OK(error)) {
822 smbd_server_connection_terminate(smb2req->xconn,
829 outbody = smbd_smb2_generate_outbody(smb2req, 0x04);
830 if (outbody.data == NULL) {
831 error = smbd_smb2_request_error(smb2req, NT_STATUS_NO_MEMORY);
832 if (!NT_STATUS_IS_OK(error)) {
833 smbd_server_connection_terminate(smb2req->xconn,
840 SSVAL(outbody.data, 0x00, 0x04); /* struct size */
841 SSVAL(outbody.data, 0x02, 0); /* reserved */
843 error = smbd_smb2_request_done(smb2req, outbody, NULL);
844 if (!NT_STATUS_IS_OK(error)) {
845 smbd_server_connection_terminate(smb2req->xconn,
851 struct smbd_smb2_logout_state {
852 struct smbd_smb2_request *smb2req;
853 struct tevent_queue *wait_queue;
856 static void smbd_smb2_logoff_wait_done(struct tevent_req *subreq);
858 static struct tevent_req *smbd_smb2_logoff_send(TALLOC_CTX *mem_ctx,
859 struct tevent_context *ev,
860 struct smbd_smb2_request *smb2req)
862 struct tevent_req *req;
863 struct smbd_smb2_logout_state *state;
864 struct tevent_req *subreq;
865 struct smbd_smb2_request *preq;
866 struct smbXsrv_connection *xconn = smb2req->xconn;
868 req = tevent_req_create(mem_ctx, &state,
869 struct smbd_smb2_logout_state);
873 state->smb2req = smb2req;
875 state->wait_queue = tevent_queue_create(state, "logoff_wait_queue");
876 if (tevent_req_nomem(state->wait_queue, req)) {
877 return tevent_req_post(req, ev);
881 * Make sure that no new request will be able to use this session.
883 smb2req->session->status = NT_STATUS_USER_SESSION_DELETED;
885 for (preq = xconn->smb2.requests; preq != NULL; preq = preq->next) {
886 if (preq == smb2req) {
887 /* Can't cancel current request. */
890 if (preq->session != smb2req->session) {
891 /* Request on different session. */
896 * Never cancel anything in a compound
897 * request. Way too hard to deal with
900 if (!preq->compound_related && preq->subreq != NULL) {
901 tevent_req_cancel(preq->subreq);
905 * Now wait until the request is finished.
907 * We don't set a callback, as we just want to block the
908 * wait queue and the talloc_free() of the request will
909 * remove the item from the wait queue.
911 subreq = tevent_queue_wait_send(preq, ev, state->wait_queue);
912 if (tevent_req_nomem(subreq, req)) {
913 return tevent_req_post(req, ev);
918 * Now we add our own waiter to the end of the queue,
919 * this way we get notified when all pending requests are finished
920 * and send to the socket.
922 subreq = tevent_queue_wait_send(state, ev, state->wait_queue);
923 if (tevent_req_nomem(subreq, req)) {
924 return tevent_req_post(req, ev);
926 tevent_req_set_callback(subreq, smbd_smb2_logoff_wait_done, req);
931 static void smbd_smb2_logoff_wait_done(struct tevent_req *subreq)
933 struct tevent_req *req = tevent_req_callback_data(
934 subreq, struct tevent_req);
935 struct smbd_smb2_logout_state *state = tevent_req_data(
936 req, struct smbd_smb2_logout_state);
939 tevent_queue_wait_recv(subreq);
943 * As we've been awoken, we may have changed
944 * uid in the meantime. Ensure we're still
945 * root (SMB2_OP_LOGOFF has .as_root = true).
947 change_to_root_user();
949 status = smbXsrv_session_logoff(state->smb2req->session);
950 if (tevent_req_nterror(req, status)) {
955 * we may need to sign the response, so we need to keep
956 * the session until the response is sent to the wire.
958 talloc_steal(state->smb2req, state->smb2req->session);
960 tevent_req_done(req);
963 static NTSTATUS smbd_smb2_logoff_recv(struct tevent_req *req)
965 return tevent_req_simple_recv_ntstatus(req);