libcli/smb: make use of samba_tevent_context_init()
[Samba/gebeck_regimport.git] / libcli / smb / smbXcli_base.c
blob4c60a05693322d1e42947037cc25b399adcd71ee
1 /*
2 Unix SMB/CIFS implementation.
3 Infrastructure for async SMB client requests
4 Copyright (C) Volker Lendecke 2008
5 Copyright (C) Stefan Metzmacher 2011
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/>.
21 #include "includes.h"
22 #include "system/network.h"
23 #include "../lib/async_req/async_sock.h"
24 #include "../lib/util/tevent_ntstatus.h"
25 #include "../lib/util/tevent_unix.h"
26 #include "lib/util/util_net.h"
27 #include "lib/util/dlinklist.h"
28 #include "../libcli/smb/smb_common.h"
29 #include "../libcli/smb/smb_seal.h"
30 #include "../libcli/smb/smb_signing.h"
31 #include "../libcli/smb/read_smb.h"
32 #include "smbXcli_base.h"
33 #include "librpc/ndr/libndr.h"
35 struct smbXcli_conn;
36 struct smbXcli_req;
37 struct smbXcli_session;
38 struct smbXcli_tcon;
40 struct smbXcli_conn {
41 int read_fd;
42 int write_fd;
43 struct sockaddr_storage local_ss;
44 struct sockaddr_storage remote_ss;
45 const char *remote_name;
47 struct tevent_queue *outgoing;
48 struct tevent_req **pending;
49 struct tevent_req *read_smb_req;
51 enum protocol_types protocol;
52 bool allow_signing;
53 bool desire_signing;
54 bool mandatory_signing;
57 * The incoming dispatch function should return:
58 * - NT_STATUS_RETRY, if more incoming PDUs are expected.
59 * - NT_STATUS_OK, if no more processing is desired, e.g.
60 * the dispatch function called
61 * tevent_req_done().
62 * - All other return values disconnect the connection.
64 NTSTATUS (*dispatch_incoming)(struct smbXcli_conn *conn,
65 TALLOC_CTX *tmp_mem,
66 uint8_t *inbuf);
68 struct {
69 struct {
70 uint32_t capabilities;
71 uint32_t max_xmit;
72 } client;
74 struct {
75 uint32_t capabilities;
76 uint32_t max_xmit;
77 uint16_t max_mux;
78 uint16_t security_mode;
79 bool readbraw;
80 bool writebraw;
81 bool lockread;
82 bool writeunlock;
83 uint32_t session_key;
84 struct GUID guid;
85 DATA_BLOB gss_blob;
86 uint8_t challenge[8];
87 const char *workgroup;
88 const char *name;
89 int time_zone;
90 NTTIME system_time;
91 } server;
93 uint32_t capabilities;
94 uint32_t max_xmit;
96 uint16_t mid;
98 struct smb_signing_state *signing;
99 struct smb_trans_enc_state *trans_enc;
101 struct tevent_req *read_braw_req;
102 } smb1;
104 struct {
105 struct {
106 uint32_t capabilities;
107 uint16_t security_mode;
108 struct GUID guid;
109 } client;
111 struct {
112 uint32_t capabilities;
113 uint16_t security_mode;
114 struct GUID guid;
115 uint32_t max_trans_size;
116 uint32_t max_read_size;
117 uint32_t max_write_size;
118 NTTIME system_time;
119 NTTIME start_time;
120 DATA_BLOB gss_blob;
121 } server;
123 uint64_t mid;
124 uint16_t cur_credits;
125 uint16_t max_credits;
126 } smb2;
128 struct smbXcli_session *sessions;
131 struct smb2cli_session {
132 uint64_t session_id;
133 uint16_t session_flags;
134 DATA_BLOB application_key;
135 DATA_BLOB signing_key;
136 bool should_sign;
137 bool should_encrypt;
138 DATA_BLOB encryption_key;
139 DATA_BLOB decryption_key;
140 uint64_t nonce_high;
141 uint64_t nonce_low;
142 uint16_t channel_sequence;
145 struct smbXcli_session {
146 struct smbXcli_session *prev, *next;
147 struct smbXcli_conn *conn;
149 struct {
150 uint16_t session_id;
151 DATA_BLOB application_key;
152 bool protected_key;
153 } smb1;
155 struct smb2cli_session *smb2;
157 struct {
158 DATA_BLOB signing_key;
159 } smb2_channel;
162 * this should be a short term hack
163 * until the upper layers have implemented
164 * re-authentication.
166 bool disconnect_expired;
169 struct smbXcli_tcon {
170 struct {
171 uint16_t tcon_id;
172 uint16_t optional_support;
173 uint32_t maximal_access;
174 uint32_t guest_maximal_access;
175 char *service;
176 char *fs_type;
177 } smb1;
179 struct {
180 uint32_t tcon_id;
181 uint8_t type;
182 uint32_t flags;
183 uint32_t capabilities;
184 uint32_t maximal_access;
185 bool should_encrypt;
186 } smb2;
189 struct smbXcli_req_state {
190 struct tevent_context *ev;
191 struct smbXcli_conn *conn;
192 struct smbXcli_session *session; /* maybe NULL */
193 struct smbXcli_tcon *tcon; /* maybe NULL */
195 uint8_t length_hdr[4];
197 bool one_way;
199 uint8_t *inbuf;
201 struct {
202 /* Space for the header including the wct */
203 uint8_t hdr[HDR_VWV];
206 * For normal requests, smb1cli_req_send chooses a mid.
207 * SecondaryV trans requests need to use the mid of the primary
208 * request, so we need a place to store it.
209 * Assume it is set if != 0.
211 uint16_t mid;
213 uint16_t *vwv;
214 uint8_t bytecount_buf[2];
216 #define MAX_SMB_IOV 10
217 /* length_hdr, hdr, words, byte_count, buffers */
218 struct iovec iov[1 + 3 + MAX_SMB_IOV];
219 int iov_count;
221 bool one_way_seqnum;
222 uint32_t seqnum;
223 struct tevent_req **chained_requests;
225 uint8_t recv_cmd;
226 NTSTATUS recv_status;
227 /* always an array of 3 talloc elements */
228 struct iovec *recv_iov;
229 } smb1;
231 struct {
232 const uint8_t *fixed;
233 uint16_t fixed_len;
234 const uint8_t *dyn;
235 uint32_t dyn_len;
237 uint8_t transform[SMB2_TF_HDR_SIZE];
238 uint8_t hdr[SMB2_HDR_BODY];
239 uint8_t pad[7]; /* padding space for compounding */
242 * always an array of 3 talloc elements
243 * (without a SMB2_TRANSFORM header!)
245 * HDR, BODY, DYN
247 struct iovec *recv_iov;
249 uint16_t credit_charge;
251 bool should_sign;
252 bool should_encrypt;
253 uint64_t encryption_session_id;
255 bool signing_skipped;
256 bool notify_async;
257 bool got_async;
258 } smb2;
261 static int smbXcli_conn_destructor(struct smbXcli_conn *conn)
264 * NT_STATUS_OK, means we do not notify the callers
266 smbXcli_conn_disconnect(conn, NT_STATUS_OK);
268 while (conn->sessions) {
269 conn->sessions->conn = NULL;
270 DLIST_REMOVE(conn->sessions, conn->sessions);
273 if (conn->smb1.trans_enc) {
274 TALLOC_FREE(conn->smb1.trans_enc);
277 return 0;
280 struct smbXcli_conn *smbXcli_conn_create(TALLOC_CTX *mem_ctx,
281 int fd,
282 const char *remote_name,
283 enum smb_signing_setting signing_state,
284 uint32_t smb1_capabilities,
285 struct GUID *client_guid,
286 uint32_t smb2_capabilities)
288 struct smbXcli_conn *conn = NULL;
289 void *ss = NULL;
290 struct sockaddr *sa = NULL;
291 socklen_t sa_length;
292 int ret;
294 conn = talloc_zero(mem_ctx, struct smbXcli_conn);
295 if (!conn) {
296 return NULL;
299 conn->read_fd = fd;
300 conn->write_fd = dup(fd);
301 if (conn->write_fd == -1) {
302 goto error;
305 conn->remote_name = talloc_strdup(conn, remote_name);
306 if (conn->remote_name == NULL) {
307 goto error;
311 ss = (void *)&conn->local_ss;
312 sa = (struct sockaddr *)ss;
313 sa_length = sizeof(conn->local_ss);
314 ret = getsockname(fd, sa, &sa_length);
315 if (ret == -1) {
316 goto error;
318 ss = (void *)&conn->remote_ss;
319 sa = (struct sockaddr *)ss;
320 sa_length = sizeof(conn->remote_ss);
321 ret = getpeername(fd, sa, &sa_length);
322 if (ret == -1) {
323 goto error;
326 conn->outgoing = tevent_queue_create(conn, "smbXcli_outgoing");
327 if (conn->outgoing == NULL) {
328 goto error;
330 conn->pending = NULL;
332 conn->protocol = PROTOCOL_NONE;
334 switch (signing_state) {
335 case SMB_SIGNING_OFF:
336 /* never */
337 conn->allow_signing = false;
338 conn->desire_signing = false;
339 conn->mandatory_signing = false;
340 break;
341 case SMB_SIGNING_DEFAULT:
342 case SMB_SIGNING_IF_REQUIRED:
343 /* if the server requires it */
344 conn->allow_signing = true;
345 conn->desire_signing = false;
346 conn->mandatory_signing = false;
347 break;
348 case SMB_SIGNING_REQUIRED:
349 /* always */
350 conn->allow_signing = true;
351 conn->desire_signing = true;
352 conn->mandatory_signing = true;
353 break;
356 conn->smb1.client.capabilities = smb1_capabilities;
357 conn->smb1.client.max_xmit = UINT16_MAX;
359 conn->smb1.capabilities = conn->smb1.client.capabilities;
360 conn->smb1.max_xmit = 1024;
362 conn->smb1.mid = 1;
364 /* initialise signing */
365 conn->smb1.signing = smb_signing_init(conn,
366 conn->allow_signing,
367 conn->desire_signing,
368 conn->mandatory_signing);
369 if (!conn->smb1.signing) {
370 goto error;
373 conn->smb2.client.security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
374 if (conn->mandatory_signing) {
375 conn->smb2.client.security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
377 if (client_guid) {
378 conn->smb2.client.guid = *client_guid;
380 conn->smb2.client.capabilities = smb2_capabilities;
382 conn->smb2.cur_credits = 1;
383 conn->smb2.max_credits = 0;
385 talloc_set_destructor(conn, smbXcli_conn_destructor);
386 return conn;
388 error:
389 if (conn->write_fd != -1) {
390 close(conn->write_fd);
392 TALLOC_FREE(conn);
393 return NULL;
396 bool smbXcli_conn_is_connected(struct smbXcli_conn *conn)
398 if (conn == NULL) {
399 return false;
402 if (conn->read_fd == -1) {
403 return false;
406 return true;
409 enum protocol_types smbXcli_conn_protocol(struct smbXcli_conn *conn)
411 return conn->protocol;
414 bool smbXcli_conn_use_unicode(struct smbXcli_conn *conn)
416 if (conn->protocol >= PROTOCOL_SMB2_02) {
417 return true;
420 if (conn->smb1.capabilities & CAP_UNICODE) {
421 return true;
424 return false;
427 void smbXcli_conn_set_sockopt(struct smbXcli_conn *conn, const char *options)
429 set_socket_options(conn->read_fd, options);
432 const struct sockaddr_storage *smbXcli_conn_local_sockaddr(struct smbXcli_conn *conn)
434 return &conn->local_ss;
437 const struct sockaddr_storage *smbXcli_conn_remote_sockaddr(struct smbXcli_conn *conn)
439 return &conn->remote_ss;
442 const char *smbXcli_conn_remote_name(struct smbXcli_conn *conn)
444 return conn->remote_name;
447 uint16_t smbXcli_conn_max_requests(struct smbXcli_conn *conn)
449 if (conn->protocol >= PROTOCOL_SMB2_02) {
451 * TODO...
453 return 1;
456 return conn->smb1.server.max_mux;
459 NTTIME smbXcli_conn_server_system_time(struct smbXcli_conn *conn)
461 if (conn->protocol >= PROTOCOL_SMB2_02) {
462 return conn->smb2.server.system_time;
465 return conn->smb1.server.system_time;
468 const DATA_BLOB *smbXcli_conn_server_gss_blob(struct smbXcli_conn *conn)
470 if (conn->protocol >= PROTOCOL_SMB2_02) {
471 return &conn->smb2.server.gss_blob;
474 return &conn->smb1.server.gss_blob;
477 const struct GUID *smbXcli_conn_server_guid(struct smbXcli_conn *conn)
479 if (conn->protocol >= PROTOCOL_SMB2_02) {
480 return &conn->smb2.server.guid;
483 return &conn->smb1.server.guid;
486 struct smbXcli_conn_samba_suicide_state {
487 struct smbXcli_conn *conn;
488 struct iovec iov;
489 uint8_t buf[9];
492 static void smbXcli_conn_samba_suicide_done(struct tevent_req *subreq);
494 struct tevent_req *smbXcli_conn_samba_suicide_send(TALLOC_CTX *mem_ctx,
495 struct tevent_context *ev,
496 struct smbXcli_conn *conn,
497 uint8_t exitcode)
499 struct tevent_req *req, *subreq;
500 struct smbXcli_conn_samba_suicide_state *state;
502 req = tevent_req_create(mem_ctx, &state,
503 struct smbXcli_conn_samba_suicide_state);
504 if (req == NULL) {
505 return NULL;
507 state->conn = conn;
508 SIVAL(state->buf, 4, 0x74697865);
509 SCVAL(state->buf, 8, exitcode);
510 _smb_setlen_nbt(state->buf, sizeof(state->buf)-4);
512 state->iov.iov_base = state->buf;
513 state->iov.iov_len = sizeof(state->buf);
515 subreq = writev_send(state, ev, conn->outgoing, conn->write_fd,
516 false, &state->iov, 1);
517 if (tevent_req_nomem(subreq, req)) {
518 return tevent_req_post(req, ev);
520 tevent_req_set_callback(subreq, smbXcli_conn_samba_suicide_done, req);
521 return req;
524 static void smbXcli_conn_samba_suicide_done(struct tevent_req *subreq)
526 struct tevent_req *req = tevent_req_callback_data(
527 subreq, struct tevent_req);
528 struct smbXcli_conn_samba_suicide_state *state = tevent_req_data(
529 req, struct smbXcli_conn_samba_suicide_state);
530 ssize_t nwritten;
531 int err;
533 nwritten = writev_recv(subreq, &err);
534 TALLOC_FREE(subreq);
535 if (nwritten == -1) {
536 NTSTATUS status = map_nt_error_from_unix_common(err);
537 smbXcli_conn_disconnect(state->conn, status);
538 return;
540 tevent_req_done(req);
543 NTSTATUS smbXcli_conn_samba_suicide_recv(struct tevent_req *req)
545 return tevent_req_simple_recv_ntstatus(req);
548 NTSTATUS smbXcli_conn_samba_suicide(struct smbXcli_conn *conn,
549 uint8_t exitcode)
551 TALLOC_CTX *frame = talloc_stackframe();
552 struct tevent_context *ev;
553 struct tevent_req *req;
554 NTSTATUS status = NT_STATUS_NO_MEMORY;
555 bool ok;
557 if (smbXcli_conn_has_async_calls(conn)) {
559 * Can't use sync call while an async call is in flight
561 status = NT_STATUS_INVALID_PARAMETER_MIX;
562 goto fail;
564 ev = samba_tevent_context_init(frame);
565 if (ev == NULL) {
566 goto fail;
568 req = smbXcli_conn_samba_suicide_send(frame, ev, conn, exitcode);
569 if (req == NULL) {
570 goto fail;
572 ok = tevent_req_poll(req, ev);
573 if (!ok) {
574 status = map_nt_error_from_unix_common(errno);
575 goto fail;
577 status = smbXcli_conn_samba_suicide_recv(req);
578 fail:
579 TALLOC_FREE(frame);
580 return status;
583 uint32_t smb1cli_conn_capabilities(struct smbXcli_conn *conn)
585 return conn->smb1.capabilities;
588 uint32_t smb1cli_conn_max_xmit(struct smbXcli_conn *conn)
590 return conn->smb1.max_xmit;
593 uint32_t smb1cli_conn_server_session_key(struct smbXcli_conn *conn)
595 return conn->smb1.server.session_key;
598 const uint8_t *smb1cli_conn_server_challenge(struct smbXcli_conn *conn)
600 return conn->smb1.server.challenge;
603 uint16_t smb1cli_conn_server_security_mode(struct smbXcli_conn *conn)
605 return conn->smb1.server.security_mode;
608 bool smb1cli_conn_server_readbraw(struct smbXcli_conn *conn)
610 return conn->smb1.server.readbraw;
613 bool smb1cli_conn_server_writebraw(struct smbXcli_conn *conn)
615 return conn->smb1.server.writebraw;
618 bool smb1cli_conn_server_lockread(struct smbXcli_conn *conn)
620 return conn->smb1.server.lockread;
623 bool smb1cli_conn_server_writeunlock(struct smbXcli_conn *conn)
625 return conn->smb1.server.writeunlock;
628 int smb1cli_conn_server_time_zone(struct smbXcli_conn *conn)
630 return conn->smb1.server.time_zone;
633 bool smb1cli_conn_activate_signing(struct smbXcli_conn *conn,
634 const DATA_BLOB user_session_key,
635 const DATA_BLOB response)
637 return smb_signing_activate(conn->smb1.signing,
638 user_session_key,
639 response);
642 bool smb1cli_conn_check_signing(struct smbXcli_conn *conn,
643 const uint8_t *buf, uint32_t seqnum)
645 const uint8_t *hdr = buf + NBT_HDR_SIZE;
646 size_t len = smb_len_nbt(buf);
648 return smb_signing_check_pdu(conn->smb1.signing, hdr, len, seqnum);
651 bool smb1cli_conn_signing_is_active(struct smbXcli_conn *conn)
653 return smb_signing_is_active(conn->smb1.signing);
656 void smb1cli_conn_set_encryption(struct smbXcli_conn *conn,
657 struct smb_trans_enc_state *es)
659 /* Replace the old state, if any. */
660 if (conn->smb1.trans_enc) {
661 TALLOC_FREE(conn->smb1.trans_enc);
663 conn->smb1.trans_enc = es;
666 bool smb1cli_conn_encryption_on(struct smbXcli_conn *conn)
668 return common_encryption_on(conn->smb1.trans_enc);
672 static NTSTATUS smb1cli_pull_raw_error(const uint8_t *hdr)
674 uint32_t flags2 = SVAL(hdr, HDR_FLG2);
675 NTSTATUS status = NT_STATUS(IVAL(hdr, HDR_RCLS));
677 if (NT_STATUS_IS_OK(status)) {
678 return NT_STATUS_OK;
681 if (flags2 & FLAGS2_32_BIT_ERROR_CODES) {
682 return status;
685 return NT_STATUS_DOS(CVAL(hdr, HDR_RCLS), SVAL(hdr, HDR_ERR));
689 * Is the SMB command able to hold an AND_X successor
690 * @param[in] cmd The SMB command in question
691 * @retval Can we add a chained request after "cmd"?
693 bool smb1cli_is_andx_req(uint8_t cmd)
695 switch (cmd) {
696 case SMBtconX:
697 case SMBlockingX:
698 case SMBopenX:
699 case SMBreadX:
700 case SMBwriteX:
701 case SMBsesssetupX:
702 case SMBulogoffX:
703 case SMBntcreateX:
704 return true;
705 break;
706 default:
707 break;
710 return false;
713 static uint16_t smb1cli_alloc_mid(struct smbXcli_conn *conn)
715 size_t num_pending = talloc_array_length(conn->pending);
716 uint16_t result;
718 while (true) {
719 size_t i;
721 result = conn->smb1.mid++;
722 if ((result == 0) || (result == 0xffff)) {
723 continue;
726 for (i=0; i<num_pending; i++) {
727 if (result == smb1cli_req_mid(conn->pending[i])) {
728 break;
732 if (i == num_pending) {
733 return result;
738 void smbXcli_req_unset_pending(struct tevent_req *req)
740 struct smbXcli_req_state *state =
741 tevent_req_data(req,
742 struct smbXcli_req_state);
743 struct smbXcli_conn *conn = state->conn;
744 size_t num_pending = talloc_array_length(conn->pending);
745 size_t i;
747 if (state->smb1.mid != 0) {
749 * This is a [nt]trans[2] request which waits
750 * for more than one reply.
752 return;
755 talloc_set_destructor(req, NULL);
757 if (num_pending == 1) {
759 * The pending read_smb tevent_req is a child of
760 * conn->pending. So if nothing is pending anymore, we need to
761 * delete the socket read fde.
763 TALLOC_FREE(conn->pending);
764 conn->read_smb_req = NULL;
765 return;
768 for (i=0; i<num_pending; i++) {
769 if (req == conn->pending[i]) {
770 break;
773 if (i == num_pending) {
775 * Something's seriously broken. Just returning here is the
776 * right thing nevertheless, the point of this routine is to
777 * remove ourselves from conn->pending.
779 return;
783 * Remove ourselves from the conn->pending array
785 for (; i < (num_pending - 1); i++) {
786 conn->pending[i] = conn->pending[i+1];
790 * No NULL check here, we're shrinking by sizeof(void *), and
791 * talloc_realloc just adjusts the size for this.
793 conn->pending = talloc_realloc(NULL, conn->pending, struct tevent_req *,
794 num_pending - 1);
795 return;
798 static int smbXcli_req_destructor(struct tevent_req *req)
800 struct smbXcli_req_state *state =
801 tevent_req_data(req,
802 struct smbXcli_req_state);
805 * Make sure we really remove it from
806 * the pending array on destruction.
808 state->smb1.mid = 0;
809 smbXcli_req_unset_pending(req);
810 return 0;
813 static bool smb1cli_req_cancel(struct tevent_req *req);
814 static bool smb2cli_req_cancel(struct tevent_req *req);
816 static bool smbXcli_req_cancel(struct tevent_req *req)
818 struct smbXcli_req_state *state =
819 tevent_req_data(req,
820 struct smbXcli_req_state);
822 if (!smbXcli_conn_is_connected(state->conn)) {
823 return false;
826 if (state->conn->protocol == PROTOCOL_NONE) {
827 return false;
830 if (state->conn->protocol >= PROTOCOL_SMB2_02) {
831 return smb2cli_req_cancel(req);
834 return smb1cli_req_cancel(req);
837 static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn);
839 bool smbXcli_req_set_pending(struct tevent_req *req)
841 struct smbXcli_req_state *state =
842 tevent_req_data(req,
843 struct smbXcli_req_state);
844 struct smbXcli_conn *conn;
845 struct tevent_req **pending;
846 size_t num_pending;
848 conn = state->conn;
850 if (!smbXcli_conn_is_connected(conn)) {
851 return false;
854 num_pending = talloc_array_length(conn->pending);
856 pending = talloc_realloc(conn, conn->pending, struct tevent_req *,
857 num_pending+1);
858 if (pending == NULL) {
859 return false;
861 pending[num_pending] = req;
862 conn->pending = pending;
863 talloc_set_destructor(req, smbXcli_req_destructor);
864 tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
866 if (!smbXcli_conn_receive_next(conn)) {
868 * the caller should notify the current request
870 * And all other pending requests get notified
871 * by smbXcli_conn_disconnect().
873 smbXcli_req_unset_pending(req);
874 smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
875 return false;
878 return true;
881 static void smbXcli_conn_received(struct tevent_req *subreq);
883 static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn)
885 size_t num_pending = talloc_array_length(conn->pending);
886 struct tevent_req *req;
887 struct smbXcli_req_state *state;
889 if (conn->read_smb_req != NULL) {
890 return true;
893 if (num_pending == 0) {
894 if (conn->smb2.mid < UINT64_MAX) {
895 /* no more pending requests, so we are done for now */
896 return true;
900 * If there are no more SMB2 requests possible,
901 * because we are out of message ids,
902 * we need to disconnect.
904 smbXcli_conn_disconnect(conn, NT_STATUS_CONNECTION_ABORTED);
905 return true;
908 req = conn->pending[0];
909 state = tevent_req_data(req, struct smbXcli_req_state);
912 * We're the first ones, add the read_smb request that waits for the
913 * answer from the server
915 conn->read_smb_req = read_smb_send(conn->pending,
916 state->ev,
917 conn->read_fd);
918 if (conn->read_smb_req == NULL) {
919 return false;
921 tevent_req_set_callback(conn->read_smb_req, smbXcli_conn_received, conn);
922 return true;
925 void smbXcli_conn_disconnect(struct smbXcli_conn *conn, NTSTATUS status)
927 struct smbXcli_session *session;
929 tevent_queue_stop(conn->outgoing);
931 if (conn->read_fd != -1) {
932 close(conn->read_fd);
934 if (conn->write_fd != -1) {
935 close(conn->write_fd);
937 conn->read_fd = -1;
938 conn->write_fd = -1;
940 session = conn->sessions;
941 if (talloc_array_length(conn->pending) == 0) {
943 * if we do not have pending requests
944 * there is no need to update the channel_sequence
946 session = NULL;
948 for (; session; session = session->next) {
949 smb2cli_session_increment_channel_sequence(session);
953 * Cancel all pending requests. We do not do a for-loop walking
954 * conn->pending because that array changes in
955 * smbXcli_req_unset_pending.
957 while (talloc_array_length(conn->pending) > 0) {
958 struct tevent_req *req;
959 struct smbXcli_req_state *state;
960 struct tevent_req **chain;
961 size_t num_chained;
962 size_t i;
964 req = conn->pending[0];
965 state = tevent_req_data(req, struct smbXcli_req_state);
967 if (state->smb1.chained_requests == NULL) {
969 * We're dead. No point waiting for trans2
970 * replies.
972 state->smb1.mid = 0;
974 smbXcli_req_unset_pending(req);
976 if (NT_STATUS_IS_OK(status)) {
977 /* do not notify the callers */
978 continue;
982 * we need to defer the callback, because we may notify
983 * more then one caller.
985 tevent_req_defer_callback(req, state->ev);
986 tevent_req_nterror(req, status);
987 continue;
990 chain = talloc_move(conn, &state->smb1.chained_requests);
991 num_chained = talloc_array_length(chain);
993 for (i=0; i<num_chained; i++) {
994 req = chain[i];
995 state = tevent_req_data(req, struct smbXcli_req_state);
998 * We're dead. No point waiting for trans2
999 * replies.
1001 state->smb1.mid = 0;
1003 smbXcli_req_unset_pending(req);
1005 if (NT_STATUS_IS_OK(status)) {
1006 /* do not notify the callers */
1007 continue;
1011 * we need to defer the callback, because we may notify
1012 * more than one caller.
1014 tevent_req_defer_callback(req, state->ev);
1015 tevent_req_nterror(req, status);
1017 TALLOC_FREE(chain);
1022 * Fetch a smb request's mid. Only valid after the request has been sent by
1023 * smb1cli_req_send().
1025 uint16_t smb1cli_req_mid(struct tevent_req *req)
1027 struct smbXcli_req_state *state =
1028 tevent_req_data(req,
1029 struct smbXcli_req_state);
1031 if (state->smb1.mid != 0) {
1032 return state->smb1.mid;
1035 return SVAL(state->smb1.hdr, HDR_MID);
1038 void smb1cli_req_set_mid(struct tevent_req *req, uint16_t mid)
1040 struct smbXcli_req_state *state =
1041 tevent_req_data(req,
1042 struct smbXcli_req_state);
1044 state->smb1.mid = mid;
1047 uint32_t smb1cli_req_seqnum(struct tevent_req *req)
1049 struct smbXcli_req_state *state =
1050 tevent_req_data(req,
1051 struct smbXcli_req_state);
1053 return state->smb1.seqnum;
1056 void smb1cli_req_set_seqnum(struct tevent_req *req, uint32_t seqnum)
1058 struct smbXcli_req_state *state =
1059 tevent_req_data(req,
1060 struct smbXcli_req_state);
1062 state->smb1.seqnum = seqnum;
1065 static size_t smbXcli_iov_len(const struct iovec *iov, int count)
1067 size_t result = 0;
1068 int i;
1069 for (i=0; i<count; i++) {
1070 result += iov[i].iov_len;
1072 return result;
1075 static uint8_t *smbXcli_iov_concat(TALLOC_CTX *mem_ctx,
1076 const struct iovec *iov,
1077 int count)
1079 size_t len = smbXcli_iov_len(iov, count);
1080 size_t copied;
1081 uint8_t *buf;
1082 int i;
1084 buf = talloc_array(mem_ctx, uint8_t, len);
1085 if (buf == NULL) {
1086 return NULL;
1088 copied = 0;
1089 for (i=0; i<count; i++) {
1090 memcpy(buf+copied, iov[i].iov_base, iov[i].iov_len);
1091 copied += iov[i].iov_len;
1093 return buf;
1096 static void smb1cli_req_flags(enum protocol_types protocol,
1097 uint32_t smb1_capabilities,
1098 uint8_t smb_command,
1099 uint8_t additional_flags,
1100 uint8_t clear_flags,
1101 uint8_t *_flags,
1102 uint16_t additional_flags2,
1103 uint16_t clear_flags2,
1104 uint16_t *_flags2)
1106 uint8_t flags = 0;
1107 uint16_t flags2 = 0;
1109 if (protocol >= PROTOCOL_LANMAN1) {
1110 flags |= FLAG_CASELESS_PATHNAMES;
1111 flags |= FLAG_CANONICAL_PATHNAMES;
1114 if (protocol >= PROTOCOL_LANMAN2) {
1115 flags2 |= FLAGS2_LONG_PATH_COMPONENTS;
1116 flags2 |= FLAGS2_EXTENDED_ATTRIBUTES;
1119 if (protocol >= PROTOCOL_NT1) {
1120 flags2 |= FLAGS2_IS_LONG_NAME;
1122 if (smb1_capabilities & CAP_UNICODE) {
1123 flags2 |= FLAGS2_UNICODE_STRINGS;
1125 if (smb1_capabilities & CAP_STATUS32) {
1126 flags2 |= FLAGS2_32_BIT_ERROR_CODES;
1128 if (smb1_capabilities & CAP_EXTENDED_SECURITY) {
1129 flags2 |= FLAGS2_EXTENDED_SECURITY;
1133 flags |= additional_flags;
1134 flags &= ~clear_flags;
1135 flags2 |= additional_flags2;
1136 flags2 &= ~clear_flags2;
1138 *_flags = flags;
1139 *_flags2 = flags2;
1142 static void smb1cli_req_cancel_done(struct tevent_req *subreq);
1144 static bool smb1cli_req_cancel(struct tevent_req *req)
1146 struct smbXcli_req_state *state =
1147 tevent_req_data(req,
1148 struct smbXcli_req_state);
1149 uint8_t flags;
1150 uint16_t flags2;
1151 uint32_t pid;
1152 uint16_t mid;
1153 struct tevent_req *subreq;
1154 NTSTATUS status;
1156 flags = CVAL(state->smb1.hdr, HDR_FLG);
1157 flags2 = SVAL(state->smb1.hdr, HDR_FLG2);
1158 pid = SVAL(state->smb1.hdr, HDR_PID);
1159 pid |= SVAL(state->smb1.hdr, HDR_PIDHIGH)<<16;
1160 mid = SVAL(state->smb1.hdr, HDR_MID);
1162 subreq = smb1cli_req_create(state, state->ev,
1163 state->conn,
1164 SMBntcancel,
1165 flags, 0,
1166 flags2, 0,
1167 0, /* timeout */
1168 pid,
1169 state->tcon,
1170 state->session,
1171 0, NULL, /* vwv */
1172 0, NULL); /* bytes */
1173 if (subreq == NULL) {
1174 return false;
1176 smb1cli_req_set_mid(subreq, mid);
1178 status = smb1cli_req_chain_submit(&subreq, 1);
1179 if (!NT_STATUS_IS_OK(status)) {
1180 TALLOC_FREE(subreq);
1181 return false;
1183 smb1cli_req_set_mid(subreq, 0);
1185 tevent_req_set_callback(subreq, smb1cli_req_cancel_done, NULL);
1187 return true;
1190 static void smb1cli_req_cancel_done(struct tevent_req *subreq)
1192 /* we do not care about the result */
1193 TALLOC_FREE(subreq);
1196 struct tevent_req *smb1cli_req_create(TALLOC_CTX *mem_ctx,
1197 struct tevent_context *ev,
1198 struct smbXcli_conn *conn,
1199 uint8_t smb_command,
1200 uint8_t additional_flags,
1201 uint8_t clear_flags,
1202 uint16_t additional_flags2,
1203 uint16_t clear_flags2,
1204 uint32_t timeout_msec,
1205 uint32_t pid,
1206 struct smbXcli_tcon *tcon,
1207 struct smbXcli_session *session,
1208 uint8_t wct, uint16_t *vwv,
1209 int iov_count,
1210 struct iovec *bytes_iov)
1212 struct tevent_req *req;
1213 struct smbXcli_req_state *state;
1214 uint8_t flags = 0;
1215 uint16_t flags2 = 0;
1216 uint16_t uid = 0;
1217 uint16_t tid = 0;
1219 if (iov_count > MAX_SMB_IOV) {
1221 * Should not happen :-)
1223 return NULL;
1226 req = tevent_req_create(mem_ctx, &state,
1227 struct smbXcli_req_state);
1228 if (req == NULL) {
1229 return NULL;
1231 state->ev = ev;
1232 state->conn = conn;
1233 state->session = session;
1234 state->tcon = tcon;
1236 if (session) {
1237 uid = session->smb1.session_id;
1240 if (tcon) {
1241 tid = tcon->smb1.tcon_id;
1244 state->smb1.recv_cmd = 0xFF;
1245 state->smb1.recv_status = NT_STATUS_INTERNAL_ERROR;
1246 state->smb1.recv_iov = talloc_zero_array(state, struct iovec, 3);
1247 if (state->smb1.recv_iov == NULL) {
1248 TALLOC_FREE(req);
1249 return NULL;
1252 smb1cli_req_flags(conn->protocol,
1253 conn->smb1.capabilities,
1254 smb_command,
1255 additional_flags,
1256 clear_flags,
1257 &flags,
1258 additional_flags2,
1259 clear_flags2,
1260 &flags2);
1262 SIVAL(state->smb1.hdr, 0, SMB_MAGIC);
1263 SCVAL(state->smb1.hdr, HDR_COM, smb_command);
1264 SIVAL(state->smb1.hdr, HDR_RCLS, NT_STATUS_V(NT_STATUS_OK));
1265 SCVAL(state->smb1.hdr, HDR_FLG, flags);
1266 SSVAL(state->smb1.hdr, HDR_FLG2, flags2);
1267 SSVAL(state->smb1.hdr, HDR_PIDHIGH, pid >> 16);
1268 SSVAL(state->smb1.hdr, HDR_TID, tid);
1269 SSVAL(state->smb1.hdr, HDR_PID, pid);
1270 SSVAL(state->smb1.hdr, HDR_UID, uid);
1271 SSVAL(state->smb1.hdr, HDR_MID, 0); /* this comes later */
1272 SCVAL(state->smb1.hdr, HDR_WCT, wct);
1274 state->smb1.vwv = vwv;
1276 SSVAL(state->smb1.bytecount_buf, 0, smbXcli_iov_len(bytes_iov, iov_count));
1278 state->smb1.iov[0].iov_base = (void *)state->length_hdr;
1279 state->smb1.iov[0].iov_len = sizeof(state->length_hdr);
1280 state->smb1.iov[1].iov_base = (void *)state->smb1.hdr;
1281 state->smb1.iov[1].iov_len = sizeof(state->smb1.hdr);
1282 state->smb1.iov[2].iov_base = (void *)state->smb1.vwv;
1283 state->smb1.iov[2].iov_len = wct * sizeof(uint16_t);
1284 state->smb1.iov[3].iov_base = (void *)state->smb1.bytecount_buf;
1285 state->smb1.iov[3].iov_len = sizeof(uint16_t);
1287 if (iov_count != 0) {
1288 memcpy(&state->smb1.iov[4], bytes_iov,
1289 iov_count * sizeof(*bytes_iov));
1291 state->smb1.iov_count = iov_count + 4;
1293 if (timeout_msec > 0) {
1294 struct timeval endtime;
1296 endtime = timeval_current_ofs_msec(timeout_msec);
1297 if (!tevent_req_set_endtime(req, ev, endtime)) {
1298 return req;
1302 switch (smb_command) {
1303 case SMBtranss:
1304 case SMBtranss2:
1305 case SMBnttranss:
1306 state->one_way = true;
1307 break;
1308 case SMBntcancel:
1309 state->one_way = true;
1310 state->smb1.one_way_seqnum = true;
1311 break;
1312 case SMBlockingX:
1313 if ((wct == 8) &&
1314 (CVAL(vwv+3, 0) == LOCKING_ANDX_OPLOCK_RELEASE)) {
1315 state->one_way = true;
1317 break;
1320 return req;
1323 static NTSTATUS smb1cli_conn_signv(struct smbXcli_conn *conn,
1324 struct iovec *iov, int iov_count,
1325 uint32_t *seqnum,
1326 bool one_way_seqnum)
1328 TALLOC_CTX *frame = NULL;
1329 uint8_t *buf;
1332 * Obvious optimization: Make cli_calculate_sign_mac work with struct
1333 * iovec directly. MD5Update would do that just fine.
1336 if (iov_count < 4) {
1337 return NT_STATUS_INVALID_PARAMETER_MIX;
1339 if (iov[0].iov_len != NBT_HDR_SIZE) {
1340 return NT_STATUS_INVALID_PARAMETER_MIX;
1342 if (iov[1].iov_len != (MIN_SMB_SIZE-sizeof(uint16_t))) {
1343 return NT_STATUS_INVALID_PARAMETER_MIX;
1345 if (iov[2].iov_len > (0xFF * sizeof(uint16_t))) {
1346 return NT_STATUS_INVALID_PARAMETER_MIX;
1348 if (iov[3].iov_len != sizeof(uint16_t)) {
1349 return NT_STATUS_INVALID_PARAMETER_MIX;
1352 frame = talloc_stackframe();
1354 buf = smbXcli_iov_concat(frame, &iov[1], iov_count - 1);
1355 if (buf == NULL) {
1356 return NT_STATUS_NO_MEMORY;
1359 *seqnum = smb_signing_next_seqnum(conn->smb1.signing,
1360 one_way_seqnum);
1361 smb_signing_sign_pdu(conn->smb1.signing,
1362 buf, talloc_get_size(buf),
1363 *seqnum);
1364 memcpy(iov[1].iov_base, buf, iov[1].iov_len);
1366 TALLOC_FREE(frame);
1367 return NT_STATUS_OK;
1370 static void smb1cli_req_writev_done(struct tevent_req *subreq);
1371 static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
1372 TALLOC_CTX *tmp_mem,
1373 uint8_t *inbuf);
1375 static NTSTATUS smb1cli_req_writev_submit(struct tevent_req *req,
1376 struct smbXcli_req_state *state,
1377 struct iovec *iov, int iov_count)
1379 struct tevent_req *subreq;
1380 NTSTATUS status;
1381 uint8_t cmd;
1382 uint16_t mid;
1384 if (!smbXcli_conn_is_connected(state->conn)) {
1385 return NT_STATUS_CONNECTION_DISCONNECTED;
1388 if (state->conn->protocol > PROTOCOL_NT1) {
1389 return NT_STATUS_REVISION_MISMATCH;
1392 if (iov_count < 4) {
1393 return NT_STATUS_INVALID_PARAMETER_MIX;
1395 if (iov[0].iov_len != NBT_HDR_SIZE) {
1396 return NT_STATUS_INVALID_PARAMETER_MIX;
1398 if (iov[1].iov_len != (MIN_SMB_SIZE-sizeof(uint16_t))) {
1399 return NT_STATUS_INVALID_PARAMETER_MIX;
1401 if (iov[2].iov_len > (0xFF * sizeof(uint16_t))) {
1402 return NT_STATUS_INVALID_PARAMETER_MIX;
1404 if (iov[3].iov_len != sizeof(uint16_t)) {
1405 return NT_STATUS_INVALID_PARAMETER_MIX;
1408 cmd = CVAL(iov[1].iov_base, HDR_COM);
1409 if (cmd == SMBreadBraw) {
1410 if (smbXcli_conn_has_async_calls(state->conn)) {
1411 return NT_STATUS_INVALID_PARAMETER_MIX;
1413 state->conn->smb1.read_braw_req = req;
1416 if (state->smb1.mid != 0) {
1417 mid = state->smb1.mid;
1418 } else {
1419 mid = smb1cli_alloc_mid(state->conn);
1421 SSVAL(iov[1].iov_base, HDR_MID, mid);
1423 _smb_setlen_nbt(iov[0].iov_base, smbXcli_iov_len(&iov[1], iov_count-1));
1425 status = smb1cli_conn_signv(state->conn, iov, iov_count,
1426 &state->smb1.seqnum,
1427 state->smb1.one_way_seqnum);
1429 if (!NT_STATUS_IS_OK(status)) {
1430 return status;
1434 * If we supported multiple encrytion contexts
1435 * here we'd look up based on tid.
1437 if (common_encryption_on(state->conn->smb1.trans_enc)) {
1438 char *buf, *enc_buf;
1440 buf = (char *)smbXcli_iov_concat(talloc_tos(), iov, iov_count);
1441 if (buf == NULL) {
1442 return NT_STATUS_NO_MEMORY;
1444 status = common_encrypt_buffer(state->conn->smb1.trans_enc,
1445 (char *)buf, &enc_buf);
1446 TALLOC_FREE(buf);
1447 if (!NT_STATUS_IS_OK(status)) {
1448 DEBUG(0, ("Error in encrypting client message: %s\n",
1449 nt_errstr(status)));
1450 return status;
1452 buf = (char *)talloc_memdup(state, enc_buf,
1453 smb_len_nbt(enc_buf)+4);
1454 SAFE_FREE(enc_buf);
1455 if (buf == NULL) {
1456 return NT_STATUS_NO_MEMORY;
1458 iov[0].iov_base = (void *)buf;
1459 iov[0].iov_len = talloc_get_size(buf);
1460 iov_count = 1;
1463 if (state->conn->dispatch_incoming == NULL) {
1464 state->conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
1467 tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
1469 subreq = writev_send(state, state->ev, state->conn->outgoing,
1470 state->conn->write_fd, false, iov, iov_count);
1471 if (subreq == NULL) {
1472 return NT_STATUS_NO_MEMORY;
1474 tevent_req_set_callback(subreq, smb1cli_req_writev_done, req);
1475 return NT_STATUS_OK;
1478 struct tevent_req *smb1cli_req_send(TALLOC_CTX *mem_ctx,
1479 struct tevent_context *ev,
1480 struct smbXcli_conn *conn,
1481 uint8_t smb_command,
1482 uint8_t additional_flags,
1483 uint8_t clear_flags,
1484 uint16_t additional_flags2,
1485 uint16_t clear_flags2,
1486 uint32_t timeout_msec,
1487 uint32_t pid,
1488 struct smbXcli_tcon *tcon,
1489 struct smbXcli_session *session,
1490 uint8_t wct, uint16_t *vwv,
1491 uint32_t num_bytes,
1492 const uint8_t *bytes)
1494 struct tevent_req *req;
1495 struct iovec iov;
1496 NTSTATUS status;
1498 iov.iov_base = discard_const_p(void, bytes);
1499 iov.iov_len = num_bytes;
1501 req = smb1cli_req_create(mem_ctx, ev, conn, smb_command,
1502 additional_flags, clear_flags,
1503 additional_flags2, clear_flags2,
1504 timeout_msec,
1505 pid, tcon, session,
1506 wct, vwv, 1, &iov);
1507 if (req == NULL) {
1508 return NULL;
1510 if (!tevent_req_is_in_progress(req)) {
1511 return tevent_req_post(req, ev);
1513 status = smb1cli_req_chain_submit(&req, 1);
1514 if (tevent_req_nterror(req, status)) {
1515 return tevent_req_post(req, ev);
1517 return req;
1520 static void smb1cli_req_writev_done(struct tevent_req *subreq)
1522 struct tevent_req *req =
1523 tevent_req_callback_data(subreq,
1524 struct tevent_req);
1525 struct smbXcli_req_state *state =
1526 tevent_req_data(req,
1527 struct smbXcli_req_state);
1528 ssize_t nwritten;
1529 int err;
1531 nwritten = writev_recv(subreq, &err);
1532 TALLOC_FREE(subreq);
1533 if (nwritten == -1) {
1534 NTSTATUS status = map_nt_error_from_unix_common(err);
1535 smbXcli_conn_disconnect(state->conn, status);
1536 return;
1539 if (state->one_way) {
1540 state->inbuf = NULL;
1541 tevent_req_done(req);
1542 return;
1545 if (!smbXcli_req_set_pending(req)) {
1546 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
1547 return;
1551 static void smbXcli_conn_received(struct tevent_req *subreq)
1553 struct smbXcli_conn *conn =
1554 tevent_req_callback_data(subreq,
1555 struct smbXcli_conn);
1556 TALLOC_CTX *frame = talloc_stackframe();
1557 NTSTATUS status;
1558 uint8_t *inbuf;
1559 ssize_t received;
1560 int err;
1562 if (subreq != conn->read_smb_req) {
1563 DEBUG(1, ("Internal error: cli_smb_received called with "
1564 "unexpected subreq\n"));
1565 status = NT_STATUS_INTERNAL_ERROR;
1566 smbXcli_conn_disconnect(conn, status);
1567 TALLOC_FREE(frame);
1568 return;
1570 conn->read_smb_req = NULL;
1572 received = read_smb_recv(subreq, frame, &inbuf, &err);
1573 TALLOC_FREE(subreq);
1574 if (received == -1) {
1575 status = map_nt_error_from_unix_common(err);
1576 smbXcli_conn_disconnect(conn, status);
1577 TALLOC_FREE(frame);
1578 return;
1581 status = conn->dispatch_incoming(conn, frame, inbuf);
1582 TALLOC_FREE(frame);
1583 if (NT_STATUS_IS_OK(status)) {
1585 * We should not do any more processing
1586 * as the dispatch function called
1587 * tevent_req_done().
1589 return;
1590 } else if (!NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
1592 * We got an error, so notify all pending requests
1594 smbXcli_conn_disconnect(conn, status);
1595 return;
1599 * We got NT_STATUS_RETRY, so we may ask for a
1600 * next incoming pdu.
1602 if (!smbXcli_conn_receive_next(conn)) {
1603 smbXcli_conn_disconnect(conn, NT_STATUS_NO_MEMORY);
1607 static NTSTATUS smb1cli_inbuf_parse_chain(uint8_t *buf, TALLOC_CTX *mem_ctx,
1608 struct iovec **piov, int *pnum_iov)
1610 struct iovec *iov;
1611 int num_iov;
1612 size_t buflen;
1613 size_t taken;
1614 size_t remaining;
1615 uint8_t *hdr;
1616 uint8_t cmd;
1617 uint32_t wct_ofs;
1618 NTSTATUS status;
1619 size_t min_size = MIN_SMB_SIZE;
1621 buflen = smb_len_nbt(buf);
1622 taken = 0;
1624 hdr = buf + NBT_HDR_SIZE;
1626 status = smb1cli_pull_raw_error(hdr);
1627 if (NT_STATUS_IS_ERR(status)) {
1629 * This is an ugly hack to support OS/2
1630 * which skips the byte_count in the DATA block
1631 * on some error responses.
1633 * See bug #9096
1635 min_size -= sizeof(uint16_t);
1638 if (buflen < min_size) {
1639 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1643 * This returns iovec elements in the following order:
1645 * - SMB header
1647 * - Parameter Block
1648 * - Data Block
1650 * - Parameter Block
1651 * - Data Block
1653 * - Parameter Block
1654 * - Data Block
1656 num_iov = 1;
1658 iov = talloc_array(mem_ctx, struct iovec, num_iov);
1659 if (iov == NULL) {
1660 return NT_STATUS_NO_MEMORY;
1662 iov[0].iov_base = hdr;
1663 iov[0].iov_len = HDR_WCT;
1664 taken += HDR_WCT;
1666 cmd = CVAL(hdr, HDR_COM);
1667 wct_ofs = HDR_WCT;
1669 while (true) {
1670 size_t len = buflen - taken;
1671 struct iovec *cur;
1672 struct iovec *iov_tmp;
1673 uint8_t wct;
1674 uint32_t bcc_ofs;
1675 uint16_t bcc;
1676 size_t needed;
1679 * we need at least WCT
1681 needed = sizeof(uint8_t);
1682 if (len < needed) {
1683 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1684 __location__, (int)len, (int)needed));
1685 goto inval;
1689 * Now we check if the specified words are there
1691 wct = CVAL(hdr, wct_ofs);
1692 needed += wct * sizeof(uint16_t);
1693 if (len < needed) {
1694 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1695 __location__, (int)len, (int)needed));
1696 goto inval;
1699 if ((num_iov == 1) &&
1700 (len == needed) &&
1701 NT_STATUS_IS_ERR(status))
1704 * This is an ugly hack to support OS/2
1705 * which skips the byte_count in the DATA block
1706 * on some error responses.
1708 * See bug #9096
1710 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
1711 num_iov + 2);
1712 if (iov_tmp == NULL) {
1713 TALLOC_FREE(iov);
1714 return NT_STATUS_NO_MEMORY;
1716 iov = iov_tmp;
1717 cur = &iov[num_iov];
1718 num_iov += 2;
1720 cur[0].iov_len = 0;
1721 cur[0].iov_base = hdr + (wct_ofs + sizeof(uint8_t));
1722 cur[1].iov_len = 0;
1723 cur[1].iov_base = cur[0].iov_base;
1725 taken += needed;
1726 break;
1730 * we need at least BCC
1732 needed += sizeof(uint16_t);
1733 if (len < needed) {
1734 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1735 __location__, (int)len, (int)needed));
1736 goto inval;
1740 * Now we check if the specified bytes are there
1742 bcc_ofs = wct_ofs + sizeof(uint8_t) + wct * sizeof(uint16_t);
1743 bcc = SVAL(hdr, bcc_ofs);
1744 needed += bcc * sizeof(uint8_t);
1745 if (len < needed) {
1746 DEBUG(10, ("%s: %d bytes left, expected at least %d\n",
1747 __location__, (int)len, (int)needed));
1748 goto inval;
1752 * we allocate 2 iovec structures for words and bytes
1754 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
1755 num_iov + 2);
1756 if (iov_tmp == NULL) {
1757 TALLOC_FREE(iov);
1758 return NT_STATUS_NO_MEMORY;
1760 iov = iov_tmp;
1761 cur = &iov[num_iov];
1762 num_iov += 2;
1764 cur[0].iov_len = wct * sizeof(uint16_t);
1765 cur[0].iov_base = hdr + (wct_ofs + sizeof(uint8_t));
1766 cur[1].iov_len = bcc * sizeof(uint8_t);
1767 cur[1].iov_base = hdr + (bcc_ofs + sizeof(uint16_t));
1769 taken += needed;
1771 if (!smb1cli_is_andx_req(cmd)) {
1773 * If the current command does not have AndX chanining
1774 * we are done.
1776 break;
1779 if (wct == 0 && bcc == 0) {
1781 * An empty response also ends the chain,
1782 * most likely with an error.
1784 break;
1787 if (wct < 2) {
1788 DEBUG(10, ("%s: wct[%d] < 2 for cmd[0x%02X]\n",
1789 __location__, (int)wct, (int)cmd));
1790 goto inval;
1792 cmd = CVAL(cur[0].iov_base, 0);
1793 if (cmd == 0xFF) {
1795 * If it is the end of the chain we are also done.
1797 break;
1799 wct_ofs = SVAL(cur[0].iov_base, 2);
1801 if (wct_ofs < taken) {
1802 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1804 if (wct_ofs > buflen) {
1805 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1809 * we consumed everything up to the start of the next
1810 * parameter block.
1812 taken = wct_ofs;
1815 remaining = buflen - taken;
1817 if (remaining > 0 && num_iov >= 3) {
1819 * The last DATA block gets the remaining
1820 * bytes, this is needed to support
1821 * CAP_LARGE_WRITEX and CAP_LARGE_READX.
1823 iov[num_iov-1].iov_len += remaining;
1826 *piov = iov;
1827 *pnum_iov = num_iov;
1828 return NT_STATUS_OK;
1830 inval:
1831 TALLOC_FREE(iov);
1832 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1835 static NTSTATUS smb1cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
1836 TALLOC_CTX *tmp_mem,
1837 uint8_t *inbuf)
1839 struct tevent_req *req;
1840 struct smbXcli_req_state *state;
1841 NTSTATUS status;
1842 size_t num_pending;
1843 size_t i;
1844 uint8_t cmd;
1845 uint16_t mid;
1846 bool oplock_break;
1847 uint8_t *inhdr = inbuf + NBT_HDR_SIZE;
1848 size_t len = smb_len_nbt(inbuf);
1849 struct iovec *iov = NULL;
1850 int num_iov = 0;
1851 struct tevent_req **chain = NULL;
1852 size_t num_chained = 0;
1853 size_t num_responses = 0;
1855 if (conn->smb1.read_braw_req != NULL) {
1856 req = conn->smb1.read_braw_req;
1857 conn->smb1.read_braw_req = NULL;
1858 state = tevent_req_data(req, struct smbXcli_req_state);
1860 smbXcli_req_unset_pending(req);
1862 if (state->smb1.recv_iov == NULL) {
1864 * For requests with more than
1865 * one response, we have to readd the
1866 * recv_iov array.
1868 state->smb1.recv_iov = talloc_zero_array(state,
1869 struct iovec,
1871 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
1872 return NT_STATUS_OK;
1876 state->smb1.recv_iov[0].iov_base = (void *)(inhdr);
1877 state->smb1.recv_iov[0].iov_len = len;
1878 ZERO_STRUCT(state->smb1.recv_iov[1]);
1879 ZERO_STRUCT(state->smb1.recv_iov[2]);
1881 state->smb1.recv_cmd = SMBreadBraw;
1882 state->smb1.recv_status = NT_STATUS_OK;
1883 state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
1885 tevent_req_done(req);
1886 return NT_STATUS_OK;
1889 if ((IVAL(inhdr, 0) != SMB_MAGIC) /* 0xFF"SMB" */
1890 && (SVAL(inhdr, 0) != 0x45ff)) /* 0xFF"E" */ {
1891 DEBUG(10, ("Got non-SMB PDU\n"));
1892 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1896 * If we supported multiple encrytion contexts
1897 * here we'd look up based on tid.
1899 if (common_encryption_on(conn->smb1.trans_enc)
1900 && (CVAL(inbuf, 0) == 0)) {
1901 uint16_t enc_ctx_num;
1903 status = get_enc_ctx_num(inbuf, &enc_ctx_num);
1904 if (!NT_STATUS_IS_OK(status)) {
1905 DEBUG(10, ("get_enc_ctx_num returned %s\n",
1906 nt_errstr(status)));
1907 return status;
1910 if (enc_ctx_num != conn->smb1.trans_enc->enc_ctx_num) {
1911 DEBUG(10, ("wrong enc_ctx %d, expected %d\n",
1912 enc_ctx_num,
1913 conn->smb1.trans_enc->enc_ctx_num));
1914 return NT_STATUS_INVALID_HANDLE;
1917 status = common_decrypt_buffer(conn->smb1.trans_enc,
1918 (char *)inbuf);
1919 if (!NT_STATUS_IS_OK(status)) {
1920 DEBUG(10, ("common_decrypt_buffer returned %s\n",
1921 nt_errstr(status)));
1922 return status;
1924 inhdr = inbuf + NBT_HDR_SIZE;
1925 len = smb_len_nbt(inbuf);
1928 mid = SVAL(inhdr, HDR_MID);
1929 num_pending = talloc_array_length(conn->pending);
1931 for (i=0; i<num_pending; i++) {
1932 if (mid == smb1cli_req_mid(conn->pending[i])) {
1933 break;
1936 if (i == num_pending) {
1937 /* Dump unexpected reply */
1938 return NT_STATUS_RETRY;
1941 oplock_break = false;
1943 if (mid == 0xffff) {
1945 * Paranoia checks that this is really an oplock break request.
1947 oplock_break = (len == 51); /* hdr + 8 words */
1948 oplock_break &= ((CVAL(inhdr, HDR_FLG) & FLAG_REPLY) == 0);
1949 oplock_break &= (CVAL(inhdr, HDR_COM) == SMBlockingX);
1950 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(6)) == 0);
1951 oplock_break &= (SVAL(inhdr, HDR_VWV+VWV(7)) == 0);
1953 if (!oplock_break) {
1954 /* Dump unexpected reply */
1955 return NT_STATUS_RETRY;
1959 req = conn->pending[i];
1960 state = tevent_req_data(req, struct smbXcli_req_state);
1962 if (!oplock_break /* oplock breaks are not signed */
1963 && !smb_signing_check_pdu(conn->smb1.signing,
1964 inhdr, len, state->smb1.seqnum+1)) {
1965 DEBUG(10, ("cli_check_sign_mac failed\n"));
1966 return NT_STATUS_ACCESS_DENIED;
1969 status = smb1cli_inbuf_parse_chain(inbuf, tmp_mem,
1970 &iov, &num_iov);
1971 if (!NT_STATUS_IS_OK(status)) {
1972 DEBUG(10,("smb1cli_inbuf_parse_chain - %s\n",
1973 nt_errstr(status)));
1974 return status;
1977 cmd = CVAL(inhdr, HDR_COM);
1978 status = smb1cli_pull_raw_error(inhdr);
1980 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED) &&
1981 (state->session != NULL) && state->session->disconnect_expired)
1984 * this should be a short term hack
1985 * until the upper layers have implemented
1986 * re-authentication.
1988 return status;
1991 if (state->smb1.chained_requests == NULL) {
1992 if (num_iov != 3) {
1993 return NT_STATUS_INVALID_NETWORK_RESPONSE;
1996 smbXcli_req_unset_pending(req);
1998 if (state->smb1.recv_iov == NULL) {
2000 * For requests with more than
2001 * one response, we have to readd the
2002 * recv_iov array.
2004 state->smb1.recv_iov = talloc_zero_array(state,
2005 struct iovec,
2007 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
2008 return NT_STATUS_OK;
2012 state->smb1.recv_cmd = cmd;
2013 state->smb1.recv_status = status;
2014 state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
2016 state->smb1.recv_iov[0] = iov[0];
2017 state->smb1.recv_iov[1] = iov[1];
2018 state->smb1.recv_iov[2] = iov[2];
2020 if (talloc_array_length(conn->pending) == 0) {
2021 tevent_req_done(req);
2022 return NT_STATUS_OK;
2025 tevent_req_defer_callback(req, state->ev);
2026 tevent_req_done(req);
2027 return NT_STATUS_RETRY;
2030 chain = talloc_move(tmp_mem, &state->smb1.chained_requests);
2031 num_chained = talloc_array_length(chain);
2032 num_responses = (num_iov - 1)/2;
2034 if (num_responses > num_chained) {
2035 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2038 for (i=0; i<num_chained; i++) {
2039 size_t iov_idx = 1 + (i*2);
2040 struct iovec *cur = &iov[iov_idx];
2041 uint8_t *inbuf_ref;
2043 req = chain[i];
2044 state = tevent_req_data(req, struct smbXcli_req_state);
2046 smbXcli_req_unset_pending(req);
2049 * as we finish multiple requests here
2050 * we need to defer the callbacks as
2051 * they could destroy our current stack state.
2053 tevent_req_defer_callback(req, state->ev);
2055 if (i >= num_responses) {
2056 tevent_req_nterror(req, NT_STATUS_REQUEST_ABORTED);
2057 continue;
2060 if (state->smb1.recv_iov == NULL) {
2062 * For requests with more than
2063 * one response, we have to readd the
2064 * recv_iov array.
2066 state->smb1.recv_iov = talloc_zero_array(state,
2067 struct iovec,
2069 if (tevent_req_nomem(state->smb1.recv_iov, req)) {
2070 continue;
2074 state->smb1.recv_cmd = cmd;
2076 if (i == (num_responses - 1)) {
2078 * The last request in the chain gets the status
2080 state->smb1.recv_status = status;
2081 } else {
2082 cmd = CVAL(cur[0].iov_base, 0);
2083 state->smb1.recv_status = NT_STATUS_OK;
2086 state->inbuf = inbuf;
2089 * Note: here we use talloc_reference() in a way
2090 * that does not expose it to the caller.
2092 inbuf_ref = talloc_reference(state->smb1.recv_iov, inbuf);
2093 if (tevent_req_nomem(inbuf_ref, req)) {
2094 continue;
2097 /* copy the related buffers */
2098 state->smb1.recv_iov[0] = iov[0];
2099 state->smb1.recv_iov[1] = cur[0];
2100 state->smb1.recv_iov[2] = cur[1];
2102 tevent_req_done(req);
2105 return NT_STATUS_RETRY;
2108 NTSTATUS smb1cli_req_recv(struct tevent_req *req,
2109 TALLOC_CTX *mem_ctx,
2110 struct iovec **piov,
2111 uint8_t **phdr,
2112 uint8_t *pwct,
2113 uint16_t **pvwv,
2114 uint32_t *pvwv_offset,
2115 uint32_t *pnum_bytes,
2116 uint8_t **pbytes,
2117 uint32_t *pbytes_offset,
2118 uint8_t **pinbuf,
2119 const struct smb1cli_req_expected_response *expected,
2120 size_t num_expected)
2122 struct smbXcli_req_state *state =
2123 tevent_req_data(req,
2124 struct smbXcli_req_state);
2125 NTSTATUS status = NT_STATUS_OK;
2126 struct iovec *recv_iov = NULL;
2127 uint8_t *hdr = NULL;
2128 uint8_t wct = 0;
2129 uint32_t vwv_offset = 0;
2130 uint16_t *vwv = NULL;
2131 uint32_t num_bytes = 0;
2132 uint32_t bytes_offset = 0;
2133 uint8_t *bytes = NULL;
2134 size_t i;
2135 bool found_status = false;
2136 bool found_size = false;
2138 if (piov != NULL) {
2139 *piov = NULL;
2141 if (phdr != NULL) {
2142 *phdr = 0;
2144 if (pwct != NULL) {
2145 *pwct = 0;
2147 if (pvwv != NULL) {
2148 *pvwv = NULL;
2150 if (pvwv_offset != NULL) {
2151 *pvwv_offset = 0;
2153 if (pnum_bytes != NULL) {
2154 *pnum_bytes = 0;
2156 if (pbytes != NULL) {
2157 *pbytes = NULL;
2159 if (pbytes_offset != NULL) {
2160 *pbytes_offset = 0;
2162 if (pinbuf != NULL) {
2163 *pinbuf = NULL;
2166 if (state->inbuf != NULL) {
2167 recv_iov = state->smb1.recv_iov;
2168 state->smb1.recv_iov = NULL;
2169 if (state->smb1.recv_cmd != SMBreadBraw) {
2170 hdr = (uint8_t *)recv_iov[0].iov_base;
2171 wct = recv_iov[1].iov_len/2;
2172 vwv = (uint16_t *)recv_iov[1].iov_base;
2173 vwv_offset = PTR_DIFF(vwv, hdr);
2174 num_bytes = recv_iov[2].iov_len;
2175 bytes = (uint8_t *)recv_iov[2].iov_base;
2176 bytes_offset = PTR_DIFF(bytes, hdr);
2180 if (tevent_req_is_nterror(req, &status)) {
2181 for (i=0; i < num_expected; i++) {
2182 if (NT_STATUS_EQUAL(status, expected[i].status)) {
2183 found_status = true;
2184 break;
2188 if (found_status) {
2189 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
2192 return status;
2195 if (num_expected == 0) {
2196 found_status = true;
2197 found_size = true;
2200 status = state->smb1.recv_status;
2202 for (i=0; i < num_expected; i++) {
2203 if (!NT_STATUS_EQUAL(status, expected[i].status)) {
2204 continue;
2207 found_status = true;
2208 if (expected[i].wct == 0) {
2209 found_size = true;
2210 break;
2213 if (expected[i].wct == wct) {
2214 found_size = true;
2215 break;
2219 if (!found_status) {
2220 return status;
2223 if (!found_size) {
2224 return NT_STATUS_INVALID_NETWORK_RESPONSE;
2227 if (piov != NULL) {
2228 *piov = talloc_move(mem_ctx, &recv_iov);
2231 if (phdr != NULL) {
2232 *phdr = hdr;
2234 if (pwct != NULL) {
2235 *pwct = wct;
2237 if (pvwv != NULL) {
2238 *pvwv = vwv;
2240 if (pvwv_offset != NULL) {
2241 *pvwv_offset = vwv_offset;
2243 if (pnum_bytes != NULL) {
2244 *pnum_bytes = num_bytes;
2246 if (pbytes != NULL) {
2247 *pbytes = bytes;
2249 if (pbytes_offset != NULL) {
2250 *pbytes_offset = bytes_offset;
2252 if (pinbuf != NULL) {
2253 *pinbuf = state->inbuf;
2256 return status;
2259 size_t smb1cli_req_wct_ofs(struct tevent_req **reqs, int num_reqs)
2261 size_t wct_ofs;
2262 int i;
2264 wct_ofs = HDR_WCT;
2266 for (i=0; i<num_reqs; i++) {
2267 struct smbXcli_req_state *state;
2268 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2269 wct_ofs += smbXcli_iov_len(state->smb1.iov+2,
2270 state->smb1.iov_count-2);
2271 wct_ofs = (wct_ofs + 3) & ~3;
2273 return wct_ofs;
2276 NTSTATUS smb1cli_req_chain_submit(struct tevent_req **reqs, int num_reqs)
2278 struct smbXcli_req_state *first_state =
2279 tevent_req_data(reqs[0],
2280 struct smbXcli_req_state);
2281 struct smbXcli_req_state *state;
2282 size_t wct_offset;
2283 size_t chain_padding = 0;
2284 int i, iovlen;
2285 struct iovec *iov = NULL;
2286 struct iovec *this_iov;
2287 NTSTATUS status;
2288 size_t nbt_len;
2290 if (num_reqs == 1) {
2291 return smb1cli_req_writev_submit(reqs[0], first_state,
2292 first_state->smb1.iov,
2293 first_state->smb1.iov_count);
2296 iovlen = 0;
2297 for (i=0; i<num_reqs; i++) {
2298 if (!tevent_req_is_in_progress(reqs[i])) {
2299 return NT_STATUS_INTERNAL_ERROR;
2302 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2304 if (state->smb1.iov_count < 4) {
2305 return NT_STATUS_INVALID_PARAMETER_MIX;
2308 if (i == 0) {
2310 * The NBT and SMB header
2312 iovlen += 2;
2313 } else {
2315 * Chain padding
2317 iovlen += 1;
2321 * words and bytes
2323 iovlen += state->smb1.iov_count - 2;
2326 iov = talloc_zero_array(first_state, struct iovec, iovlen);
2327 if (iov == NULL) {
2328 return NT_STATUS_NO_MEMORY;
2331 first_state->smb1.chained_requests = (struct tevent_req **)talloc_memdup(
2332 first_state, reqs, sizeof(*reqs) * num_reqs);
2333 if (first_state->smb1.chained_requests == NULL) {
2334 TALLOC_FREE(iov);
2335 return NT_STATUS_NO_MEMORY;
2338 wct_offset = HDR_WCT;
2339 this_iov = iov;
2341 for (i=0; i<num_reqs; i++) {
2342 size_t next_padding = 0;
2343 uint16_t *vwv;
2345 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2347 if (i < num_reqs-1) {
2348 if (!smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))
2349 || CVAL(state->smb1.hdr, HDR_WCT) < 2) {
2350 TALLOC_FREE(iov);
2351 TALLOC_FREE(first_state->smb1.chained_requests);
2352 return NT_STATUS_INVALID_PARAMETER_MIX;
2356 wct_offset += smbXcli_iov_len(state->smb1.iov+2,
2357 state->smb1.iov_count-2) + 1;
2358 if ((wct_offset % 4) != 0) {
2359 next_padding = 4 - (wct_offset % 4);
2361 wct_offset += next_padding;
2362 vwv = state->smb1.vwv;
2364 if (i < num_reqs-1) {
2365 struct smbXcli_req_state *next_state =
2366 tevent_req_data(reqs[i+1],
2367 struct smbXcli_req_state);
2368 SCVAL(vwv+0, 0, CVAL(next_state->smb1.hdr, HDR_COM));
2369 SCVAL(vwv+0, 1, 0);
2370 SSVAL(vwv+1, 0, wct_offset);
2371 } else if (smb1cli_is_andx_req(CVAL(state->smb1.hdr, HDR_COM))) {
2372 /* properly end the chain */
2373 SCVAL(vwv+0, 0, 0xff);
2374 SCVAL(vwv+0, 1, 0xff);
2375 SSVAL(vwv+1, 0, 0);
2378 if (i == 0) {
2380 * The NBT and SMB header
2382 this_iov[0] = state->smb1.iov[0];
2383 this_iov[1] = state->smb1.iov[1];
2384 this_iov += 2;
2385 } else {
2387 * This one is a bit subtle. We have to add
2388 * chain_padding bytes between the requests, and we
2389 * have to also include the wct field of the
2390 * subsequent requests. We use the subsequent header
2391 * for the padding, it contains the wct field in its
2392 * last byte.
2394 this_iov[0].iov_len = chain_padding+1;
2395 this_iov[0].iov_base = (void *)&state->smb1.hdr[
2396 sizeof(state->smb1.hdr) - this_iov[0].iov_len];
2397 memset(this_iov[0].iov_base, 0, this_iov[0].iov_len-1);
2398 this_iov += 1;
2402 * copy the words and bytes
2404 memcpy(this_iov, state->smb1.iov+2,
2405 sizeof(struct iovec) * (state->smb1.iov_count-2));
2406 this_iov += state->smb1.iov_count - 2;
2407 chain_padding = next_padding;
2410 nbt_len = smbXcli_iov_len(&iov[1], iovlen-1);
2411 if (nbt_len > first_state->conn->smb1.max_xmit) {
2412 TALLOC_FREE(iov);
2413 TALLOC_FREE(first_state->smb1.chained_requests);
2414 return NT_STATUS_INVALID_PARAMETER_MIX;
2417 status = smb1cli_req_writev_submit(reqs[0], first_state, iov, iovlen);
2418 if (!NT_STATUS_IS_OK(status)) {
2419 TALLOC_FREE(iov);
2420 TALLOC_FREE(first_state->smb1.chained_requests);
2421 return status;
2424 return NT_STATUS_OK;
2427 bool smbXcli_conn_has_async_calls(struct smbXcli_conn *conn)
2429 return ((tevent_queue_length(conn->outgoing) != 0)
2430 || (talloc_array_length(conn->pending) != 0));
2433 uint32_t smb2cli_conn_server_capabilities(struct smbXcli_conn *conn)
2435 return conn->smb2.server.capabilities;
2438 uint16_t smb2cli_conn_server_security_mode(struct smbXcli_conn *conn)
2440 return conn->smb2.server.security_mode;
2443 uint32_t smb2cli_conn_max_trans_size(struct smbXcli_conn *conn)
2445 return conn->smb2.server.max_trans_size;
2448 uint32_t smb2cli_conn_max_read_size(struct smbXcli_conn *conn)
2450 return conn->smb2.server.max_read_size;
2453 uint32_t smb2cli_conn_max_write_size(struct smbXcli_conn *conn)
2455 return conn->smb2.server.max_write_size;
2458 void smb2cli_conn_set_max_credits(struct smbXcli_conn *conn,
2459 uint16_t max_credits)
2461 conn->smb2.max_credits = max_credits;
2464 static void smb2cli_req_cancel_done(struct tevent_req *subreq);
2466 static bool smb2cli_req_cancel(struct tevent_req *req)
2468 struct smbXcli_req_state *state =
2469 tevent_req_data(req,
2470 struct smbXcli_req_state);
2471 uint32_t flags = IVAL(state->smb2.hdr, SMB2_HDR_FLAGS);
2472 uint64_t mid = BVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID);
2473 uint64_t aid = BVAL(state->smb2.hdr, SMB2_HDR_ASYNC_ID);
2474 struct smbXcli_tcon *tcon = state->tcon;
2475 struct smbXcli_session *session = state->session;
2476 uint8_t *fixed = state->smb2.pad;
2477 uint16_t fixed_len = 4;
2478 struct tevent_req *subreq;
2479 struct smbXcli_req_state *substate;
2480 NTSTATUS status;
2482 SSVAL(fixed, 0, 0x04);
2483 SSVAL(fixed, 2, 0);
2485 subreq = smb2cli_req_create(state, state->ev,
2486 state->conn,
2487 SMB2_OP_CANCEL,
2488 flags, 0,
2489 0, /* timeout */
2490 tcon, session,
2491 fixed, fixed_len,
2492 NULL, 0);
2493 if (subreq == NULL) {
2494 return false;
2496 substate = tevent_req_data(subreq, struct smbXcli_req_state);
2499 * clear everything but the SMB2_HDR_FLAG_ASYNC flag
2500 * e.g. if SMB2_HDR_FLAG_CHAINED is set we get INVALID_PARAMETER back
2502 flags &= SMB2_HDR_FLAG_ASYNC;
2504 if (flags & SMB2_HDR_FLAG_ASYNC) {
2505 mid = 0;
2508 SIVAL(substate->smb2.hdr, SMB2_HDR_FLAGS, flags);
2509 SBVAL(substate->smb2.hdr, SMB2_HDR_MESSAGE_ID, mid);
2510 SBVAL(substate->smb2.hdr, SMB2_HDR_ASYNC_ID, aid);
2512 status = smb2cli_req_compound_submit(&subreq, 1);
2513 if (!NT_STATUS_IS_OK(status)) {
2514 TALLOC_FREE(subreq);
2515 return false;
2518 tevent_req_set_callback(subreq, smb2cli_req_cancel_done, NULL);
2520 return true;
2523 static void smb2cli_req_cancel_done(struct tevent_req *subreq)
2525 /* we do not care about the result */
2526 TALLOC_FREE(subreq);
2529 struct tevent_req *smb2cli_req_create(TALLOC_CTX *mem_ctx,
2530 struct tevent_context *ev,
2531 struct smbXcli_conn *conn,
2532 uint16_t cmd,
2533 uint32_t additional_flags,
2534 uint32_t clear_flags,
2535 uint32_t timeout_msec,
2536 struct smbXcli_tcon *tcon,
2537 struct smbXcli_session *session,
2538 const uint8_t *fixed,
2539 uint16_t fixed_len,
2540 const uint8_t *dyn,
2541 uint32_t dyn_len)
2543 struct tevent_req *req;
2544 struct smbXcli_req_state *state;
2545 uint32_t flags = 0;
2546 uint32_t tid = 0;
2547 uint64_t uid = 0;
2548 bool use_channel_sequence = false;
2549 uint16_t channel_sequence = 0;
2551 req = tevent_req_create(mem_ctx, &state,
2552 struct smbXcli_req_state);
2553 if (req == NULL) {
2554 return NULL;
2557 state->ev = ev;
2558 state->conn = conn;
2559 state->session = session;
2560 state->tcon = tcon;
2562 if (conn->smb2.server.capabilities & SMB2_CAP_PERSISTENT_HANDLES) {
2563 use_channel_sequence = true;
2564 } else if (conn->smb2.server.capabilities & SMB2_CAP_MULTI_CHANNEL) {
2565 use_channel_sequence = true;
2568 if (session) {
2569 uid = session->smb2->session_id;
2571 if (use_channel_sequence) {
2572 channel_sequence = session->smb2->channel_sequence;
2575 state->smb2.should_sign = session->smb2->should_sign;
2576 state->smb2.should_encrypt = session->smb2->should_encrypt;
2578 if (cmd == SMB2_OP_SESSSETUP &&
2579 session->smb2->signing_key.length != 0) {
2580 state->smb2.should_sign = true;
2583 if (cmd == SMB2_OP_SESSSETUP &&
2584 session->smb2_channel.signing_key.length == 0) {
2585 state->smb2.should_encrypt = false;
2589 if (tcon) {
2590 tid = tcon->smb2.tcon_id;
2592 if (tcon->smb2.should_encrypt) {
2593 state->smb2.should_encrypt = true;
2597 if (state->smb2.should_encrypt) {
2598 state->smb2.should_sign = false;
2601 state->smb2.recv_iov = talloc_zero_array(state, struct iovec, 3);
2602 if (state->smb2.recv_iov == NULL) {
2603 TALLOC_FREE(req);
2604 return NULL;
2607 flags |= additional_flags;
2608 flags &= ~clear_flags;
2610 state->smb2.fixed = fixed;
2611 state->smb2.fixed_len = fixed_len;
2612 state->smb2.dyn = dyn;
2613 state->smb2.dyn_len = dyn_len;
2615 if (state->smb2.should_encrypt) {
2616 SIVAL(state->smb2.transform, SMB2_TF_PROTOCOL_ID, SMB2_TF_MAGIC);
2617 SBVAL(state->smb2.transform, SMB2_TF_SESSION_ID, uid);
2620 SIVAL(state->smb2.hdr, SMB2_HDR_PROTOCOL_ID, SMB2_MAGIC);
2621 SSVAL(state->smb2.hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
2622 SSVAL(state->smb2.hdr, SMB2_HDR_OPCODE, cmd);
2623 SSVAL(state->smb2.hdr, SMB2_HDR_CHANNEL_SEQUENCE, channel_sequence);
2624 SIVAL(state->smb2.hdr, SMB2_HDR_FLAGS, flags);
2625 SIVAL(state->smb2.hdr, SMB2_HDR_PID, 0); /* reserved */
2626 SIVAL(state->smb2.hdr, SMB2_HDR_TID, tid);
2627 SBVAL(state->smb2.hdr, SMB2_HDR_SESSION_ID, uid);
2629 switch (cmd) {
2630 case SMB2_OP_CANCEL:
2631 state->one_way = true;
2632 break;
2633 case SMB2_OP_BREAK:
2635 * If this is a dummy request, it will have
2636 * UINT64_MAX as message id.
2637 * If we send on break acknowledgement,
2638 * this gets overwritten later.
2640 SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, UINT64_MAX);
2641 break;
2644 if (timeout_msec > 0) {
2645 struct timeval endtime;
2647 endtime = timeval_current_ofs_msec(timeout_msec);
2648 if (!tevent_req_set_endtime(req, ev, endtime)) {
2649 return req;
2653 return req;
2656 void smb2cli_req_set_notify_async(struct tevent_req *req)
2658 struct smbXcli_req_state *state =
2659 tevent_req_data(req,
2660 struct smbXcli_req_state);
2662 state->smb2.notify_async = true;
2665 static void smb2cli_req_writev_done(struct tevent_req *subreq);
2666 static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
2667 TALLOC_CTX *tmp_mem,
2668 uint8_t *inbuf);
2670 NTSTATUS smb2cli_req_compound_submit(struct tevent_req **reqs,
2671 int num_reqs)
2673 struct smbXcli_req_state *state;
2674 struct tevent_req *subreq;
2675 struct iovec *iov;
2676 int i, num_iov, nbt_len;
2677 int tf_iov = -1;
2678 const DATA_BLOB *encryption_key = NULL;
2679 uint64_t encryption_session_id = 0;
2682 * 1 for the nbt length, optional TRANSFORM
2683 * per request: HDR, fixed, dyn, padding
2684 * -1 because the last one does not need padding
2687 iov = talloc_array(reqs[0], struct iovec, 1 + 1 + 4*num_reqs - 1);
2688 if (iov == NULL) {
2689 return NT_STATUS_NO_MEMORY;
2692 num_iov = 1;
2693 nbt_len = 0;
2696 * the session of the first request that requires encryption
2697 * specifies the encryption key.
2699 for (i=0; i<num_reqs; i++) {
2700 if (!tevent_req_is_in_progress(reqs[i])) {
2701 return NT_STATUS_INTERNAL_ERROR;
2704 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2706 if (!smbXcli_conn_is_connected(state->conn)) {
2707 return NT_STATUS_CONNECTION_DISCONNECTED;
2710 if ((state->conn->protocol != PROTOCOL_NONE) &&
2711 (state->conn->protocol < PROTOCOL_SMB2_02)) {
2712 return NT_STATUS_REVISION_MISMATCH;
2715 if (state->session == NULL) {
2716 continue;
2719 if (!state->smb2.should_encrypt) {
2720 continue;
2723 encryption_key = &state->session->smb2->encryption_key;
2724 if (encryption_key->length == 0) {
2725 return NT_STATUS_INVALID_PARAMETER_MIX;
2728 encryption_session_id = state->session->smb2->session_id;
2730 tf_iov = num_iov;
2731 iov[num_iov].iov_base = state->smb2.transform;
2732 iov[num_iov].iov_len = sizeof(state->smb2.transform);
2733 num_iov += 1;
2735 SBVAL(state->smb2.transform, SMB2_TF_PROTOCOL_ID, SMB2_TF_MAGIC);
2736 SBVAL(state->smb2.transform, SMB2_TF_NONCE,
2737 state->session->smb2->nonce_low);
2738 SBVAL(state->smb2.transform, SMB2_TF_NONCE+8,
2739 state->session->smb2->nonce_high);
2740 SBVAL(state->smb2.transform, SMB2_TF_SESSION_ID,
2741 encryption_session_id);
2743 state->session->smb2->nonce_low += 1;
2744 if (state->session->smb2->nonce_low == 0) {
2745 state->session->smb2->nonce_high += 1;
2746 state->session->smb2->nonce_low += 1;
2749 nbt_len += SMB2_TF_HDR_SIZE;
2750 break;
2753 for (i=0; i<num_reqs; i++) {
2754 int hdr_iov;
2755 size_t reqlen;
2756 bool ret;
2757 uint16_t opcode;
2758 uint64_t avail;
2759 uint16_t charge;
2760 uint16_t credits;
2761 uint64_t mid;
2762 const DATA_BLOB *signing_key = NULL;
2764 if (!tevent_req_is_in_progress(reqs[i])) {
2765 return NT_STATUS_INTERNAL_ERROR;
2768 state = tevent_req_data(reqs[i], struct smbXcli_req_state);
2770 if (!smbXcli_conn_is_connected(state->conn)) {
2771 return NT_STATUS_CONNECTION_DISCONNECTED;
2774 if ((state->conn->protocol != PROTOCOL_NONE) &&
2775 (state->conn->protocol < PROTOCOL_SMB2_02)) {
2776 return NT_STATUS_REVISION_MISMATCH;
2779 opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
2780 if (opcode == SMB2_OP_CANCEL) {
2781 goto skip_credits;
2784 avail = UINT64_MAX - state->conn->smb2.mid;
2785 if (avail < 1) {
2786 return NT_STATUS_CONNECTION_ABORTED;
2789 if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
2790 charge = (MAX(state->smb2.dyn_len, 1) - 1)/ 65536 + 1;
2791 } else {
2792 charge = 1;
2795 charge = MAX(state->smb2.credit_charge, charge);
2797 avail = MIN(avail, state->conn->smb2.cur_credits);
2798 if (avail < charge) {
2799 return NT_STATUS_INTERNAL_ERROR;
2802 credits = 0;
2803 if (state->conn->smb2.max_credits > state->conn->smb2.cur_credits) {
2804 credits = state->conn->smb2.max_credits -
2805 state->conn->smb2.cur_credits;
2807 if (state->conn->smb2.max_credits >= state->conn->smb2.cur_credits) {
2808 credits += 1;
2811 mid = state->conn->smb2.mid;
2812 state->conn->smb2.mid += charge;
2813 state->conn->smb2.cur_credits -= charge;
2815 if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
2816 SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT_CHARGE, charge);
2818 SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT, credits);
2819 SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, mid);
2821 skip_credits:
2822 if (state->session && encryption_key == NULL) {
2824 * We prefer the channel signing key if it is
2825 * already there.
2827 if (state->smb2.should_sign) {
2828 signing_key = &state->session->smb2_channel.signing_key;
2832 * If it is a channel binding, we already have the main
2833 * signing key and try that one.
2835 if (signing_key && signing_key->length == 0) {
2836 signing_key = &state->session->smb2->signing_key;
2840 * If we do not have any session key yet, we skip the
2841 * signing of SMB2_OP_SESSSETUP requests.
2843 if (signing_key && signing_key->length == 0) {
2844 signing_key = NULL;
2848 hdr_iov = num_iov;
2849 iov[num_iov].iov_base = state->smb2.hdr;
2850 iov[num_iov].iov_len = sizeof(state->smb2.hdr);
2851 num_iov += 1;
2853 iov[num_iov].iov_base = discard_const(state->smb2.fixed);
2854 iov[num_iov].iov_len = state->smb2.fixed_len;
2855 num_iov += 1;
2857 if (state->smb2.dyn != NULL) {
2858 iov[num_iov].iov_base = discard_const(state->smb2.dyn);
2859 iov[num_iov].iov_len = state->smb2.dyn_len;
2860 num_iov += 1;
2863 reqlen = sizeof(state->smb2.hdr);
2864 reqlen += state->smb2.fixed_len;
2865 reqlen += state->smb2.dyn_len;
2867 if (i < num_reqs-1) {
2868 if ((reqlen % 8) > 0) {
2869 uint8_t pad = 8 - (reqlen % 8);
2870 iov[num_iov].iov_base = state->smb2.pad;
2871 iov[num_iov].iov_len = pad;
2872 num_iov += 1;
2873 reqlen += pad;
2875 SIVAL(state->smb2.hdr, SMB2_HDR_NEXT_COMMAND, reqlen);
2878 state->smb2.encryption_session_id = encryption_session_id;
2880 if (signing_key != NULL) {
2881 NTSTATUS status;
2883 status = smb2_signing_sign_pdu(*signing_key,
2884 state->session->conn->protocol,
2885 &iov[hdr_iov], num_iov - hdr_iov);
2886 if (!NT_STATUS_IS_OK(status)) {
2887 return status;
2891 nbt_len += reqlen;
2893 ret = smbXcli_req_set_pending(reqs[i]);
2894 if (!ret) {
2895 return NT_STATUS_NO_MEMORY;
2899 state = tevent_req_data(reqs[0], struct smbXcli_req_state);
2900 _smb_setlen_tcp(state->length_hdr, nbt_len);
2901 iov[0].iov_base = state->length_hdr;
2902 iov[0].iov_len = sizeof(state->length_hdr);
2904 if (encryption_key != NULL) {
2905 NTSTATUS status;
2906 size_t buflen = nbt_len - SMB2_TF_HDR_SIZE;
2907 uint8_t *buf;
2908 int vi;
2910 buf = talloc_array(iov, uint8_t, buflen);
2911 if (buf == NULL) {
2912 return NT_STATUS_NO_MEMORY;
2916 * We copy the buffers before encrypting them,
2917 * this is at least currently needed for the
2918 * to keep state->smb2.hdr.
2920 * Also the callers may expect there buffers
2921 * to be const.
2923 for (vi = tf_iov + 1; vi < num_iov; vi++) {
2924 struct iovec *v = &iov[vi];
2925 const uint8_t *o = (const uint8_t *)v->iov_base;
2927 memcpy(buf, o, v->iov_len);
2928 v->iov_base = (void *)buf;
2929 buf += v->iov_len;
2932 status = smb2_signing_encrypt_pdu(*encryption_key,
2933 state->conn->protocol,
2934 &iov[tf_iov], num_iov - tf_iov);
2935 if (!NT_STATUS_IS_OK(status)) {
2936 return status;
2940 if (state->conn->dispatch_incoming == NULL) {
2941 state->conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
2944 subreq = writev_send(state, state->ev, state->conn->outgoing,
2945 state->conn->write_fd, false, iov, num_iov);
2946 if (subreq == NULL) {
2947 return NT_STATUS_NO_MEMORY;
2949 tevent_req_set_callback(subreq, smb2cli_req_writev_done, reqs[0]);
2950 return NT_STATUS_OK;
2953 void smb2cli_req_set_credit_charge(struct tevent_req *req, uint16_t charge)
2955 struct smbXcli_req_state *state =
2956 tevent_req_data(req,
2957 struct smbXcli_req_state);
2959 state->smb2.credit_charge = charge;
2962 struct tevent_req *smb2cli_req_send(TALLOC_CTX *mem_ctx,
2963 struct tevent_context *ev,
2964 struct smbXcli_conn *conn,
2965 uint16_t cmd,
2966 uint32_t additional_flags,
2967 uint32_t clear_flags,
2968 uint32_t timeout_msec,
2969 struct smbXcli_tcon *tcon,
2970 struct smbXcli_session *session,
2971 const uint8_t *fixed,
2972 uint16_t fixed_len,
2973 const uint8_t *dyn,
2974 uint32_t dyn_len)
2976 struct tevent_req *req;
2977 NTSTATUS status;
2979 req = smb2cli_req_create(mem_ctx, ev, conn, cmd,
2980 additional_flags, clear_flags,
2981 timeout_msec,
2982 tcon, session,
2983 fixed, fixed_len, dyn, dyn_len);
2984 if (req == NULL) {
2985 return NULL;
2987 if (!tevent_req_is_in_progress(req)) {
2988 return tevent_req_post(req, ev);
2990 status = smb2cli_req_compound_submit(&req, 1);
2991 if (tevent_req_nterror(req, status)) {
2992 return tevent_req_post(req, ev);
2994 return req;
2997 static void smb2cli_req_writev_done(struct tevent_req *subreq)
2999 struct tevent_req *req =
3000 tevent_req_callback_data(subreq,
3001 struct tevent_req);
3002 struct smbXcli_req_state *state =
3003 tevent_req_data(req,
3004 struct smbXcli_req_state);
3005 ssize_t nwritten;
3006 int err;
3008 nwritten = writev_recv(subreq, &err);
3009 TALLOC_FREE(subreq);
3010 if (nwritten == -1) {
3011 /* here, we need to notify all pending requests */
3012 NTSTATUS status = map_nt_error_from_unix_common(err);
3013 smbXcli_conn_disconnect(state->conn, status);
3014 return;
3018 static NTSTATUS smb2cli_inbuf_parse_compound(struct smbXcli_conn *conn,
3019 uint8_t *buf,
3020 size_t buflen,
3021 TALLOC_CTX *mem_ctx,
3022 struct iovec **piov, int *pnum_iov)
3024 struct iovec *iov;
3025 int num_iov = 0;
3026 size_t taken = 0;
3027 uint8_t *first_hdr = buf;
3028 size_t verified_buflen = 0;
3029 uint8_t *tf = NULL;
3030 size_t tf_len = 0;
3032 iov = talloc_array(mem_ctx, struct iovec, num_iov);
3033 if (iov == NULL) {
3034 return NT_STATUS_NO_MEMORY;
3037 while (taken < buflen) {
3038 size_t len = buflen - taken;
3039 uint8_t *hdr = first_hdr + taken;
3040 struct iovec *cur;
3041 size_t full_size;
3042 size_t next_command_ofs;
3043 uint16_t body_size;
3044 struct iovec *iov_tmp;
3046 if (verified_buflen > taken) {
3047 len = verified_buflen - taken;
3048 } else {
3049 tf = NULL;
3050 tf_len = 0;
3053 if (len < 4) {
3054 DEBUG(10, ("%d bytes left, expected at least %d\n",
3055 (int)len, 4));
3056 goto inval;
3058 if (IVAL(hdr, 0) == SMB2_TF_MAGIC) {
3059 struct smbXcli_session *s;
3060 uint64_t uid;
3061 struct iovec tf_iov[2];
3062 size_t enc_len;
3063 NTSTATUS status;
3065 if (len < SMB2_TF_HDR_SIZE) {
3066 DEBUG(10, ("%d bytes left, expected at least %d\n",
3067 (int)len, SMB2_TF_HDR_SIZE));
3068 goto inval;
3070 tf = hdr;
3071 tf_len = SMB2_TF_HDR_SIZE;
3072 taken += tf_len;
3074 hdr = first_hdr + taken;
3075 enc_len = IVAL(tf, SMB2_TF_MSG_SIZE);
3076 uid = BVAL(tf, SMB2_TF_SESSION_ID);
3078 if (len < SMB2_TF_HDR_SIZE + enc_len) {
3079 DEBUG(10, ("%d bytes left, expected at least %d\n",
3080 (int)len,
3081 (int)(SMB2_TF_HDR_SIZE + enc_len)));
3082 goto inval;
3085 s = conn->sessions;
3086 for (; s; s = s->next) {
3087 if (s->smb2->session_id != uid) {
3088 continue;
3090 break;
3093 if (s == NULL) {
3094 DEBUG(10, ("unknown session_id %llu\n",
3095 (unsigned long long)uid));
3096 goto inval;
3099 tf_iov[0].iov_base = (void *)tf;
3100 tf_iov[0].iov_len = tf_len;
3101 tf_iov[1].iov_base = (void *)hdr;
3102 tf_iov[1].iov_len = enc_len;
3104 status = smb2_signing_decrypt_pdu(s->smb2->decryption_key,
3105 conn->protocol,
3106 tf_iov, 2);
3107 if (!NT_STATUS_IS_OK(status)) {
3108 TALLOC_FREE(iov);
3109 return status;
3112 verified_buflen = taken + enc_len;
3113 len = enc_len;
3117 * We need the header plus the body length field
3120 if (len < SMB2_HDR_BODY + 2) {
3121 DEBUG(10, ("%d bytes left, expected at least %d\n",
3122 (int)len, SMB2_HDR_BODY));
3123 goto inval;
3125 if (IVAL(hdr, 0) != SMB2_MAGIC) {
3126 DEBUG(10, ("Got non-SMB2 PDU: %x\n",
3127 IVAL(hdr, 0)));
3128 goto inval;
3130 if (SVAL(hdr, 4) != SMB2_HDR_BODY) {
3131 DEBUG(10, ("Got HDR len %d, expected %d\n",
3132 SVAL(hdr, 4), SMB2_HDR_BODY));
3133 goto inval;
3136 full_size = len;
3137 next_command_ofs = IVAL(hdr, SMB2_HDR_NEXT_COMMAND);
3138 body_size = SVAL(hdr, SMB2_HDR_BODY);
3140 if (next_command_ofs != 0) {
3141 if (next_command_ofs < (SMB2_HDR_BODY + 2)) {
3142 goto inval;
3144 if (next_command_ofs > full_size) {
3145 goto inval;
3147 full_size = next_command_ofs;
3149 if (body_size < 2) {
3150 goto inval;
3152 body_size &= 0xfffe;
3154 if (body_size > (full_size - SMB2_HDR_BODY)) {
3155 goto inval;
3158 iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
3159 num_iov + 4);
3160 if (iov_tmp == NULL) {
3161 TALLOC_FREE(iov);
3162 return NT_STATUS_NO_MEMORY;
3164 iov = iov_tmp;
3165 cur = &iov[num_iov];
3166 num_iov += 4;
3168 cur[0].iov_base = tf;
3169 cur[0].iov_len = tf_len;
3170 cur[1].iov_base = hdr;
3171 cur[1].iov_len = SMB2_HDR_BODY;
3172 cur[2].iov_base = hdr + SMB2_HDR_BODY;
3173 cur[2].iov_len = body_size;
3174 cur[3].iov_base = hdr + SMB2_HDR_BODY + body_size;
3175 cur[3].iov_len = full_size - (SMB2_HDR_BODY + body_size);
3177 taken += full_size;
3180 *piov = iov;
3181 *pnum_iov = num_iov;
3182 return NT_STATUS_OK;
3184 inval:
3185 TALLOC_FREE(iov);
3186 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3189 static struct tevent_req *smb2cli_conn_find_pending(struct smbXcli_conn *conn,
3190 uint64_t mid)
3192 size_t num_pending = talloc_array_length(conn->pending);
3193 size_t i;
3195 for (i=0; i<num_pending; i++) {
3196 struct tevent_req *req = conn->pending[i];
3197 struct smbXcli_req_state *state =
3198 tevent_req_data(req,
3199 struct smbXcli_req_state);
3201 if (mid == BVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID)) {
3202 return req;
3205 return NULL;
3208 static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
3209 TALLOC_CTX *tmp_mem,
3210 uint8_t *inbuf)
3212 struct tevent_req *req;
3213 struct smbXcli_req_state *state = NULL;
3214 struct iovec *iov;
3215 int i, num_iov;
3216 NTSTATUS status;
3217 bool defer = true;
3218 struct smbXcli_session *last_session = NULL;
3219 size_t inbuf_len = smb_len_tcp(inbuf);
3221 status = smb2cli_inbuf_parse_compound(conn,
3222 inbuf + NBT_HDR_SIZE,
3223 inbuf_len,
3224 tmp_mem,
3225 &iov, &num_iov);
3226 if (!NT_STATUS_IS_OK(status)) {
3227 return status;
3230 for (i=0; i<num_iov; i+=4) {
3231 uint8_t *inbuf_ref = NULL;
3232 struct iovec *cur = &iov[i];
3233 uint8_t *inhdr = (uint8_t *)cur[1].iov_base;
3234 uint16_t opcode = SVAL(inhdr, SMB2_HDR_OPCODE);
3235 uint32_t flags = IVAL(inhdr, SMB2_HDR_FLAGS);
3236 uint64_t mid = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
3237 uint16_t req_opcode;
3238 uint32_t req_flags;
3239 uint16_t credits = SVAL(inhdr, SMB2_HDR_CREDIT);
3240 uint32_t new_credits;
3241 struct smbXcli_session *session = NULL;
3242 const DATA_BLOB *signing_key = NULL;
3243 bool was_encrypted = false;
3245 new_credits = conn->smb2.cur_credits;
3246 new_credits += credits;
3247 if (new_credits > UINT16_MAX) {
3248 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3250 conn->smb2.cur_credits += credits;
3252 req = smb2cli_conn_find_pending(conn, mid);
3253 if (req == NULL) {
3254 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3256 state = tevent_req_data(req, struct smbXcli_req_state);
3258 state->smb2.got_async = false;
3260 req_opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
3261 if (opcode != req_opcode) {
3262 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3264 req_flags = SVAL(state->smb2.hdr, SMB2_HDR_FLAGS);
3266 if (!(flags & SMB2_HDR_FLAG_REDIRECT)) {
3267 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3270 status = NT_STATUS(IVAL(inhdr, SMB2_HDR_STATUS));
3271 if ((flags & SMB2_HDR_FLAG_ASYNC) &&
3272 NT_STATUS_EQUAL(status, STATUS_PENDING)) {
3273 uint64_t async_id = BVAL(inhdr, SMB2_HDR_ASYNC_ID);
3276 * async interim responses are not signed,
3277 * even if the SMB2_HDR_FLAG_SIGNED flag
3278 * is set.
3280 req_flags |= SMB2_HDR_FLAG_ASYNC;
3281 SBVAL(state->smb2.hdr, SMB2_HDR_FLAGS, req_flags);
3282 SBVAL(state->smb2.hdr, SMB2_HDR_ASYNC_ID, async_id);
3284 if (state->smb2.notify_async) {
3285 state->smb2.got_async = true;
3286 tevent_req_defer_callback(req, state->ev);
3287 tevent_req_notify_callback(req);
3289 continue;
3292 session = state->session;
3293 if (req_flags & SMB2_HDR_FLAG_CHAINED) {
3294 session = last_session;
3296 last_session = session;
3298 if (state->smb2.should_sign) {
3299 if (!(flags & SMB2_HDR_FLAG_SIGNED)) {
3300 return NT_STATUS_ACCESS_DENIED;
3304 if (flags & SMB2_HDR_FLAG_SIGNED) {
3305 uint64_t uid = BVAL(inhdr, SMB2_HDR_SESSION_ID);
3307 if (session == NULL) {
3308 struct smbXcli_session *s;
3310 s = state->conn->sessions;
3311 for (; s; s = s->next) {
3312 if (s->smb2->session_id != uid) {
3313 continue;
3316 session = s;
3317 break;
3321 if (session == NULL) {
3322 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3325 last_session = session;
3326 signing_key = &session->smb2_channel.signing_key;
3329 if (opcode == SMB2_OP_SESSSETUP) {
3331 * We prefer the channel signing key, if it is
3332 * already there.
3334 * If we do not have a channel signing key yet,
3335 * we try the main signing key, if it is not
3336 * the final response.
3338 if (signing_key && signing_key->length == 0 &&
3339 !NT_STATUS_IS_OK(status)) {
3340 signing_key = &session->smb2->signing_key;
3343 if (signing_key && signing_key->length == 0) {
3345 * If we do not have a session key to
3346 * verify the signature, we defer the
3347 * signing check to the caller.
3349 * The caller gets NT_STATUS_OK, it
3350 * has to call
3351 * smb2cli_session_set_session_key()
3352 * or
3353 * smb2cli_session_set_channel_key()
3354 * which will check the signature
3355 * with the channel signing key.
3357 signing_key = NULL;
3361 if (cur[0].iov_len == SMB2_TF_HDR_SIZE) {
3362 const uint8_t *tf = (const uint8_t *)cur[0].iov_base;
3363 uint64_t uid = BVAL(tf, SMB2_TF_SESSION_ID);
3366 * If the response was encrypted in a SMB2_TRANSFORM
3367 * pdu, which belongs to the correct session,
3368 * we do not need to do signing checks
3370 * It could be the session the response belongs to
3371 * or the session that was used to encrypt the
3372 * SMB2_TRANSFORM request.
3374 if ((session && session->smb2->session_id == uid) ||
3375 (state->smb2.encryption_session_id == uid)) {
3376 signing_key = NULL;
3377 was_encrypted = true;
3381 if (NT_STATUS_EQUAL(status, NT_STATUS_USER_SESSION_DELETED)) {
3383 * if the server returns NT_STATUS_USER_SESSION_DELETED
3384 * the response is not signed and we should
3385 * propagate the NT_STATUS_USER_SESSION_DELETED
3386 * status to the caller.
3388 state->smb2.signing_skipped = true;
3389 signing_key = NULL;
3392 if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
3394 * if the server returns
3395 * NT_STATUS_INVALID_PARAMETER
3396 * the response might not be encrypted.
3398 if (state->smb2.should_encrypt && !was_encrypted) {
3399 state->smb2.signing_skipped = true;
3400 signing_key = NULL;
3404 if (state->smb2.should_encrypt && !was_encrypted) {
3405 if (!state->smb2.signing_skipped) {
3406 return NT_STATUS_ACCESS_DENIED;
3410 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_NAME_DELETED) ||
3411 NT_STATUS_EQUAL(status, NT_STATUS_FILE_CLOSED) ||
3412 NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
3414 * if the server returns
3415 * NT_STATUS_NETWORK_NAME_DELETED
3416 * NT_STATUS_FILE_CLOSED
3417 * NT_STATUS_INVALID_PARAMETER
3418 * the response might not be signed
3419 * as this happens before the signing checks.
3421 * If server echos the signature (or all zeros)
3422 * we should report the status from the server
3423 * to the caller.
3425 if (signing_key) {
3426 int cmp;
3428 cmp = memcmp(inhdr+SMB2_HDR_SIGNATURE,
3429 state->smb2.hdr+SMB2_HDR_SIGNATURE,
3430 16);
3431 if (cmp == 0) {
3432 state->smb2.signing_skipped = true;
3433 signing_key = NULL;
3436 if (signing_key) {
3437 int cmp;
3438 static const uint8_t zeros[16];
3440 cmp = memcmp(inhdr+SMB2_HDR_SIGNATURE,
3441 zeros,
3442 16);
3443 if (cmp == 0) {
3444 state->smb2.signing_skipped = true;
3445 signing_key = NULL;
3450 if (signing_key) {
3451 status = smb2_signing_check_pdu(*signing_key,
3452 state->conn->protocol,
3453 &cur[1], 3);
3454 if (!NT_STATUS_IS_OK(status)) {
3456 * If the signing check fails, we disconnect
3457 * the connection.
3459 return status;
3463 if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED) &&
3464 (session != NULL) && session->disconnect_expired)
3467 * this should be a short term hack
3468 * until the upper layers have implemented
3469 * re-authentication.
3471 return status;
3474 smbXcli_req_unset_pending(req);
3477 * There might be more than one response
3478 * we need to defer the notifications
3480 if ((num_iov == 5) && (talloc_array_length(conn->pending) == 0)) {
3481 defer = false;
3484 if (defer) {
3485 tevent_req_defer_callback(req, state->ev);
3489 * Note: here we use talloc_reference() in a way
3490 * that does not expose it to the caller.
3492 inbuf_ref = talloc_reference(state->smb2.recv_iov, inbuf);
3493 if (tevent_req_nomem(inbuf_ref, req)) {
3494 continue;
3497 /* copy the related buffers */
3498 state->smb2.recv_iov[0] = cur[1];
3499 state->smb2.recv_iov[1] = cur[2];
3500 state->smb2.recv_iov[2] = cur[3];
3502 tevent_req_done(req);
3505 if (defer) {
3506 return NT_STATUS_RETRY;
3509 return NT_STATUS_OK;
3512 NTSTATUS smb2cli_req_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
3513 struct iovec **piov,
3514 const struct smb2cli_req_expected_response *expected,
3515 size_t num_expected)
3517 struct smbXcli_req_state *state =
3518 tevent_req_data(req,
3519 struct smbXcli_req_state);
3520 NTSTATUS status;
3521 size_t body_size;
3522 bool found_status = false;
3523 bool found_size = false;
3524 size_t i;
3526 if (piov != NULL) {
3527 *piov = NULL;
3530 if (state->smb2.got_async) {
3531 return STATUS_PENDING;
3534 if (tevent_req_is_nterror(req, &status)) {
3535 for (i=0; i < num_expected; i++) {
3536 if (NT_STATUS_EQUAL(status, expected[i].status)) {
3537 found_status = true;
3538 break;
3542 if (found_status) {
3543 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
3546 return status;
3549 if (num_expected == 0) {
3550 found_status = true;
3551 found_size = true;
3554 status = NT_STATUS(IVAL(state->smb2.recv_iov[0].iov_base, SMB2_HDR_STATUS));
3555 body_size = SVAL(state->smb2.recv_iov[1].iov_base, 0);
3557 for (i=0; i < num_expected; i++) {
3558 if (!NT_STATUS_EQUAL(status, expected[i].status)) {
3559 continue;
3562 found_status = true;
3563 if (expected[i].body_size == 0) {
3564 found_size = true;
3565 break;
3568 if (expected[i].body_size == body_size) {
3569 found_size = true;
3570 break;
3574 if (!found_status) {
3575 return status;
3578 if (state->smb2.signing_skipped) {
3579 if (num_expected > 0) {
3580 return NT_STATUS_ACCESS_DENIED;
3582 if (!NT_STATUS_IS_ERR(status)) {
3583 return NT_STATUS_ACCESS_DENIED;
3587 if (!found_size) {
3588 return NT_STATUS_INVALID_NETWORK_RESPONSE;
3591 if (piov != NULL) {
3592 *piov = talloc_move(mem_ctx, &state->smb2.recv_iov);
3595 return status;
3598 static const struct {
3599 enum protocol_types proto;
3600 const char *smb1_name;
3601 } smb1cli_prots[] = {
3602 {PROTOCOL_CORE, "PC NETWORK PROGRAM 1.0"},
3603 {PROTOCOL_COREPLUS, "MICROSOFT NETWORKS 1.03"},
3604 {PROTOCOL_LANMAN1, "MICROSOFT NETWORKS 3.0"},
3605 {PROTOCOL_LANMAN1, "LANMAN1.0"},
3606 {PROTOCOL_LANMAN2, "LM1.2X002"},
3607 {PROTOCOL_LANMAN2, "DOS LANMAN2.1"},
3608 {PROTOCOL_LANMAN2, "LANMAN2.1"},
3609 {PROTOCOL_LANMAN2, "Samba"},
3610 {PROTOCOL_NT1, "NT LANMAN 1.0"},
3611 {PROTOCOL_NT1, "NT LM 0.12"},
3612 {PROTOCOL_SMB2_02, "SMB 2.002"},
3613 {PROTOCOL_SMB2_10, "SMB 2.???"},
3616 static const struct {
3617 enum protocol_types proto;
3618 uint16_t smb2_dialect;
3619 } smb2cli_prots[] = {
3620 {PROTOCOL_SMB2_02, SMB2_DIALECT_REVISION_202},
3621 {PROTOCOL_SMB2_10, SMB2_DIALECT_REVISION_210},
3622 {PROTOCOL_SMB2_22, SMB2_DIALECT_REVISION_222},
3623 {PROTOCOL_SMB2_24, SMB2_DIALECT_REVISION_224},
3624 {PROTOCOL_SMB3_00, SMB3_DIALECT_REVISION_300},
3627 struct smbXcli_negprot_state {
3628 struct smbXcli_conn *conn;
3629 struct tevent_context *ev;
3630 uint32_t timeout_msec;
3631 enum protocol_types min_protocol;
3632 enum protocol_types max_protocol;
3634 struct {
3635 uint8_t fixed[36];
3636 uint8_t dyn[ARRAY_SIZE(smb2cli_prots)*2];
3637 } smb2;
3640 static void smbXcli_negprot_invalid_done(struct tevent_req *subreq);
3641 static struct tevent_req *smbXcli_negprot_smb1_subreq(struct smbXcli_negprot_state *state);
3642 static void smbXcli_negprot_smb1_done(struct tevent_req *subreq);
3643 static struct tevent_req *smbXcli_negprot_smb2_subreq(struct smbXcli_negprot_state *state);
3644 static void smbXcli_negprot_smb2_done(struct tevent_req *subreq);
3645 static NTSTATUS smbXcli_negprot_dispatch_incoming(struct smbXcli_conn *conn,
3646 TALLOC_CTX *frame,
3647 uint8_t *inbuf);
3649 struct tevent_req *smbXcli_negprot_send(TALLOC_CTX *mem_ctx,