2 Unix SMB/CIFS implementation.
3 Infrastructure for async SMB client requests
4 Copyright (C) Volker Lendecke 2008
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
21 #include "libsmb/libsmb.h"
22 #include "../lib/async_req/async_sock.h"
23 #include "../lib/util/tevent_ntstatus.h"
24 #include "../lib/util/tevent_unix.h"
25 #include "async_smb.h"
26 #include "smb_crypt.h"
27 #include "libsmb/nmblib.h"
30 static NTSTATUS cli_pull_raw_error(const uint8_t *buf)
32 uint32_t flags2 = SVAL(buf, smb_flg2);
34 if (flags2 & FLAGS2_32_BIT_ERROR_CODES) {
35 return NT_STATUS(IVAL(buf, smb_rcls));
38 return NT_STATUS_DOS(CVAL(buf, smb_rcls), SVAL(buf,smb_err));
42 * Figure out if there is an andx command behind the current one
43 * @param[in] buf The smb buffer to look at
44 * @param[in] ofs The offset to the wct field that is followed by the cmd
45 * @retval Is there a command following?
48 static bool have_andx_command(const char *buf, uint16_t ofs)
51 size_t buflen = talloc_get_size(buf);
53 if ((ofs == buflen-1) || (ofs == buflen)) {
60 * Not enough space for the command and a following pointer
64 return (CVAL(buf, ofs+1) != 0xff);
69 struct cli_smb_state {
70 struct tevent_context *ev;
71 struct cli_state *cli;
72 uint8_t header[smb_wct+1]; /* Space for the header including the wct */
75 * For normal requests, cli_smb_req_send chooses a mid. Secondary
76 * trans requests need to use the mid of the primary request, so we
77 * need a place to store it. Assume it's set if != 0.
82 uint8_t bytecount_buf[2];
84 struct iovec iov[MAX_SMB_IOV+3];
91 struct tevent_req **chained_requests;
94 static uint16_t cli_alloc_mid(struct cli_state *cli)
96 int num_pending = talloc_array_length(cli->conn.pending);
102 result = cli->smb1.mid++;
103 if ((result == 0) || (result == 0xffff)) {
107 for (i=0; i<num_pending; i++) {
108 if (result == cli_smb_req_mid(cli->conn.pending[i])) {
113 if (i == num_pending) {
119 void cli_smb_req_unset_pending(struct tevent_req *req)
121 struct cli_smb_state *state = tevent_req_data(
122 req, struct cli_smb_state);
123 struct cli_state *cli = state->cli;
124 int num_pending = talloc_array_length(cli->conn.pending);
127 if (state->mid != 0) {
129 * This is a [nt]trans[2] request which waits
130 * for more than one reply.
135 talloc_set_destructor(req, NULL);
137 if (num_pending == 1) {
139 * The pending read_smb tevent_req is a child of
140 * cli->pending. So if nothing is pending anymore, we need to
141 * delete the socket read fde.
143 TALLOC_FREE(cli->conn.pending);
144 cli->conn.read_smb_req = NULL;
148 for (i=0; i<num_pending; i++) {
149 if (req == cli->conn.pending[i]) {
153 if (i == num_pending) {
155 * Something's seriously broken. Just returning here is the
156 * right thing nevertheless, the point of this routine is to
157 * remove ourselves from cli->conn.pending.
163 * Remove ourselves from the cli->conn.pending array
165 cli->conn.pending[i] = cli->conn.pending[num_pending-1];
168 * No NULL check here, we're shrinking by sizeof(void *), and
169 * talloc_realloc just adjusts the size for this.
171 cli->conn.pending = talloc_realloc(NULL, cli->conn.pending,
177 static int cli_smb_req_destructor(struct tevent_req *req)
179 struct cli_smb_state *state = tevent_req_data(
180 req, struct cli_smb_state);
182 * Make sure we really remove it from
183 * the pending array on destruction.
186 cli_smb_req_unset_pending(req);
190 static bool cli_state_receive_next(struct cli_state *cli);
191 static void cli_state_notify_pending(struct cli_state *cli, NTSTATUS status);
193 bool cli_smb_req_set_pending(struct tevent_req *req)
195 struct cli_smb_state *state = tevent_req_data(
196 req, struct cli_smb_state);
197 struct cli_state *cli;
198 struct tevent_req **pending;
202 num_pending = talloc_array_length(cli->conn.pending);
204 pending = talloc_realloc(cli, cli->conn.pending, struct tevent_req *,
206 if (pending == NULL) {
209 pending[num_pending] = req;
210 cli->conn.pending = pending;
211 talloc_set_destructor(req, cli_smb_req_destructor);
213 if (!cli_state_receive_next(cli)) {
215 * the caller should notify the current request
217 * And all other pending requests get notified
218 * by cli_state_notify_pending().
220 cli_smb_req_unset_pending(req);
221 cli_state_notify_pending(cli, NT_STATUS_NO_MEMORY);
228 static void cli_smb_received(struct tevent_req *subreq);
230 static bool cli_state_receive_next(struct cli_state *cli)
232 size_t num_pending = talloc_array_length(cli->conn.pending);
233 struct tevent_req *req;
234 struct cli_smb_state *state;
236 if (cli->conn.read_smb_req != NULL) {
240 if (num_pending == 0) {
244 req = cli->conn.pending[0];
245 state = tevent_req_data(req, struct cli_smb_state);
248 * We're the first ones, add the read_smb request that waits for the
249 * answer from the server
251 cli->conn.read_smb_req = read_smb_send(cli->conn.pending, state->ev,
253 if (cli->conn.read_smb_req == NULL) {
256 tevent_req_set_callback(cli->conn.read_smb_req, cli_smb_received, cli);
260 static void cli_state_notify_pending(struct cli_state *cli, NTSTATUS status)
262 cli_state_disconnect(cli);
265 * Cancel all pending requests. We do not do a for-loop walking
266 * cli->conn.pending because that array changes in
267 * cli_smb_req_destructor().
269 while (talloc_array_length(cli->conn.pending) > 0) {
270 struct tevent_req *req;
271 struct cli_smb_state *state;
273 req = cli->conn.pending[0];
274 state = tevent_req_data(req, struct cli_smb_state);
276 cli_smb_req_unset_pending(req);
279 * we need to defer the callback, because we may notify more
282 tevent_req_defer_callback(req, state->ev);
283 tevent_req_nterror(req, status);
288 * Fetch a smb request's mid. Only valid after the request has been sent by
289 * cli_smb_req_send().
291 uint16_t cli_smb_req_mid(struct tevent_req *req)
293 struct cli_smb_state *state = tevent_req_data(
294 req, struct cli_smb_state);
295 return SVAL(state->header, smb_mid);
298 void cli_smb_req_set_mid(struct tevent_req *req, uint16_t mid)
300 struct cli_smb_state *state = tevent_req_data(
301 req, struct cli_smb_state);
305 uint32_t cli_smb_req_seqnum(struct tevent_req *req)
307 struct cli_smb_state *state = tevent_req_data(
308 req, struct cli_smb_state);
309 return state->seqnum;
312 void cli_smb_req_set_seqnum(struct tevent_req *req, uint32_t seqnum)
314 struct cli_smb_state *state = tevent_req_data(
315 req, struct cli_smb_state);
316 state->seqnum = seqnum;
319 static size_t iov_len(const struct iovec *iov, int count)
323 for (i=0; i<count; i++) {
324 result += iov[i].iov_len;
329 static uint8_t *iov_concat(TALLOC_CTX *mem_ctx, const struct iovec *iov,
332 size_t len = iov_len(iov, count);
337 buf = talloc_array(mem_ctx, uint8_t, len);
342 for (i=0; i<count; i++) {
343 memcpy(buf+copied, iov[i].iov_base, iov[i].iov_len);
344 copied += iov[i].iov_len;
349 struct tevent_req *cli_smb_req_create(TALLOC_CTX *mem_ctx,
350 struct event_context *ev,
351 struct cli_state *cli,
353 uint8_t additional_flags,
354 uint8_t wct, uint16_t *vwv,
356 struct iovec *bytes_iov)
358 struct tevent_req *result;
359 struct cli_smb_state *state;
360 struct timeval endtime;
362 if (iov_count > MAX_SMB_IOV) {
364 * Should not happen :-)
369 result = tevent_req_create(mem_ctx, &state, struct cli_smb_state);
370 if (result == NULL) {
375 state->mid = 0; /* Set to auto-choose in cli_smb_req_send */
376 state->chain_num = 0;
377 state->chained_requests = NULL;
379 cli_setup_packet_buf(cli, (char *)state->header);
380 SCVAL(state->header, smb_com, smb_command);
381 SSVAL(state->header, smb_tid, cli->smb1.tid);
382 SCVAL(state->header, smb_wct, wct);
386 SSVAL(state->bytecount_buf, 0, iov_len(bytes_iov, iov_count));
388 state->iov[0].iov_base = (void *)state->header;
389 state->iov[0].iov_len = sizeof(state->header);
390 state->iov[1].iov_base = (void *)state->vwv;
391 state->iov[1].iov_len = wct * sizeof(uint16_t);
392 state->iov[2].iov_base = (void *)state->bytecount_buf;
393 state->iov[2].iov_len = sizeof(uint16_t);
395 if (iov_count != 0) {
396 memcpy(&state->iov[3], bytes_iov,
397 iov_count * sizeof(*bytes_iov));
399 state->iov_count = iov_count + 3;
402 endtime = timeval_current_ofs_msec(cli->timeout);
403 if (!tevent_req_set_endtime(result, ev, endtime)) {
404 tevent_req_oom(result);
410 static NTSTATUS cli_signv(struct cli_state *cli, struct iovec *iov, int count,
416 * Obvious optimization: Make cli_calculate_sign_mac work with struct
417 * iovec directly. MD5Update would do that just fine.
420 if ((count <= 0) || (iov[0].iov_len < smb_wct)) {
421 return NT_STATUS_INVALID_PARAMETER;
424 buf = iov_concat(talloc_tos(), iov, count);
426 return NT_STATUS_NO_MEMORY;
429 cli_calculate_sign_mac(cli, (char *)buf, seqnum);
430 memcpy(iov[0].iov_base, buf, iov[0].iov_len);
436 static void cli_smb_sent(struct tevent_req *subreq);
438 static NTSTATUS cli_smb_req_iov_send(struct tevent_req *req,
439 struct cli_smb_state *state,
440 struct iovec *iov, int iov_count)
442 struct tevent_req *subreq;
445 if (!cli_state_is_connected(state->cli)) {
446 return NT_STATUS_CONNECTION_INVALID;
449 if (iov[0].iov_len < smb_wct) {
450 return NT_STATUS_INVALID_PARAMETER;
453 if (state->mid != 0) {
454 SSVAL(iov[0].iov_base, smb_mid, state->mid);
456 uint16_t mid = cli_alloc_mid(state->cli);
457 SSVAL(iov[0].iov_base, smb_mid, mid);
460 smb_setlen((char *)iov[0].iov_base, iov_len(iov, iov_count) - 4);
462 status = cli_signv(state->cli, iov, iov_count, &state->seqnum);
464 if (!NT_STATUS_IS_OK(status)) {
468 if (cli_encryption_on(state->cli)) {
471 buf = (char *)iov_concat(talloc_tos(), iov, iov_count);
473 return NT_STATUS_NO_MEMORY;
475 status = common_encrypt_buffer(state->cli->trans_enc_state,
476 (char *)buf, &enc_buf);
478 if (!NT_STATUS_IS_OK(status)) {
479 DEBUG(0, ("Error in encrypting client message: %s\n",
483 buf = (char *)talloc_memdup(state, enc_buf,
487 return NT_STATUS_NO_MEMORY;
489 iov[0].iov_base = (void *)buf;
490 iov[0].iov_len = talloc_get_size(buf);
493 subreq = writev_send(state, state->ev, state->cli->conn.outgoing,
494 state->cli->conn.fd, false, iov, iov_count);
495 if (subreq == NULL) {
496 return NT_STATUS_NO_MEMORY;
498 tevent_req_set_callback(subreq, cli_smb_sent, req);
502 NTSTATUS cli_smb_req_send(struct tevent_req *req)
504 struct cli_smb_state *state = tevent_req_data(
505 req, struct cli_smb_state);
507 return cli_smb_req_iov_send(req, state, state->iov, state->iov_count);
510 struct tevent_req *cli_smb_send(TALLOC_CTX *mem_ctx,
511 struct event_context *ev,
512 struct cli_state *cli,
514 uint8_t additional_flags,
515 uint8_t wct, uint16_t *vwv,
517 const uint8_t *bytes)
519 struct tevent_req *req;
523 iov.iov_base = discard_const_p(void, bytes);
524 iov.iov_len = num_bytes;
526 req = cli_smb_req_create(mem_ctx, ev, cli, smb_command,
527 additional_flags, wct, vwv, 1, &iov);
532 status = cli_smb_req_send(req);
533 if (!NT_STATUS_IS_OK(status)) {
534 tevent_req_nterror(req, status);
535 return tevent_req_post(req, ev);
540 static void cli_smb_sent(struct tevent_req *subreq)
542 struct tevent_req *req = tevent_req_callback_data(
543 subreq, struct tevent_req);
544 struct cli_smb_state *state = tevent_req_data(
545 req, struct cli_smb_state);
549 nwritten = writev_recv(subreq, &err);
551 if (nwritten == -1) {
552 NTSTATUS status = map_nt_error_from_unix(err);
553 cli_state_notify_pending(state->cli, status);
557 switch (CVAL(state->header, smb_com)) {
563 tevent_req_done(req);
566 if ((CVAL(state->header, smb_wct) == 8) &&
567 (CVAL(state->vwv+3, 0) == LOCKING_ANDX_OPLOCK_RELEASE)) {
569 tevent_req_done(req);
574 if (!cli_smb_req_set_pending(req)) {
575 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
580 static void cli_smb_received(struct tevent_req *subreq)
582 struct cli_state *cli = tevent_req_callback_data(
583 subreq, struct cli_state);
584 TALLOC_CTX *frame = talloc_stackframe();
585 struct tevent_req *req;
586 struct cli_smb_state *state;
595 if (subreq != cli->conn.read_smb_req) {
596 DEBUG(1, ("Internal error: cli_smb_received called with "
597 "unexpected subreq\n"));
598 status = NT_STATUS_INTERNAL_ERROR;
599 cli_state_notify_pending(cli, status);
603 received = read_smb_recv(subreq, frame, &inbuf, &err);
605 cli->conn.read_smb_req = NULL;
606 if (received == -1) {
607 status = map_nt_error_from_unix(err);
608 cli_state_notify_pending(cli, status);
613 if ((IVAL(inbuf, 4) != 0x424d53ff) /* 0xFF"SMB" */
614 && (SVAL(inbuf, 4) != 0x45ff)) /* 0xFF"E" */ {
615 DEBUG(10, ("Got non-SMB PDU\n"));
616 status = NT_STATUS_INVALID_NETWORK_RESPONSE;
617 cli_state_notify_pending(cli, status);
622 if (cli_encryption_on(cli) && (CVAL(inbuf, 0) == 0)) {
623 uint16_t enc_ctx_num;
625 status = get_enc_ctx_num(inbuf, &enc_ctx_num);
626 if (!NT_STATUS_IS_OK(status)) {
627 DEBUG(10, ("get_enc_ctx_num returned %s\n",
629 cli_state_notify_pending(cli, status);
634 if (enc_ctx_num != cli->trans_enc_state->enc_ctx_num) {
635 DEBUG(10, ("wrong enc_ctx %d, expected %d\n",
637 cli->trans_enc_state->enc_ctx_num));
638 status = NT_STATUS_INVALID_HANDLE;
639 cli_state_notify_pending(cli, status);
644 status = common_decrypt_buffer(cli->trans_enc_state,
646 if (!NT_STATUS_IS_OK(status)) {
647 DEBUG(10, ("common_decrypt_buffer returned %s\n",
649 cli_state_notify_pending(cli, status);
655 mid = SVAL(inbuf, smb_mid);
656 num_pending = talloc_array_length(cli->conn.pending);
658 for (i=0; i<num_pending; i++) {
659 if (mid == cli_smb_req_mid(cli->conn.pending[i])) {
663 if (i == num_pending) {
664 /* Dump unexpected reply */
668 oplock_break = false;
672 * Paranoia checks that this is really an oplock break request.
674 oplock_break = (smb_len(inbuf) == 51); /* hdr + 8 words */
675 oplock_break &= ((CVAL(inbuf, smb_flg) & FLAG_REPLY) == 0);
676 oplock_break &= (CVAL(inbuf, smb_com) == SMBlockingX);
677 oplock_break &= (SVAL(inbuf, smb_vwv6) == 0);
678 oplock_break &= (SVAL(inbuf, smb_vwv7) == 0);
681 /* Dump unexpected reply */
686 req = cli->conn.pending[i];
687 state = tevent_req_data(req, struct cli_smb_state);
689 if (!oplock_break /* oplock breaks are not signed */
690 && !cli_check_sign_mac(cli, (char *)inbuf, state->seqnum+1)) {
691 DEBUG(10, ("cli_check_sign_mac failed\n"));
692 status = NT_STATUS_ACCESS_DENIED;
693 cli_state_notify_pending(cli, status);
698 if (state->chained_requests == NULL) {
699 state->inbuf = talloc_move(state, &inbuf);
700 cli_smb_req_unset_pending(req);
701 state->chain_num = 0;
702 state->chain_length = 1;
703 tevent_req_done(req);
705 struct tevent_req **chain = talloc_move(frame,
706 &state->chained_requests);
707 int num_chained = talloc_array_length(chain);
709 for (i=0; i<num_chained; i++) {
710 state = tevent_req_data(chain[i], struct
712 state->inbuf = inbuf;
713 state->chain_num = i;
714 state->chain_length = num_chained;
715 cli_smb_req_unset_pending(req);
716 tevent_req_done(chain[i]);
722 if ((talloc_array_length(cli->conn.pending) > 0) &&
723 (cli->conn.read_smb_req == NULL)) {
725 * Set up another read request for the other pending cli_smb
728 state = tevent_req_data(cli->conn.pending[0],
729 struct cli_smb_state);
730 cli->conn.read_smb_req = read_smb_send(
731 cli->conn.pending, state->ev, cli->conn.fd);
732 if (cli->conn.read_smb_req == NULL) {
733 status = NT_STATUS_NO_MEMORY;
734 cli_state_notify_pending(cli, status);
737 tevent_req_set_callback(cli->conn.read_smb_req,
738 cli_smb_received, cli);
742 NTSTATUS cli_smb_recv(struct tevent_req *req,
743 TALLOC_CTX *mem_ctx, uint8_t **pinbuf,
744 uint8_t min_wct, uint8_t *pwct, uint16_t **pvwv,
745 uint32_t *pnum_bytes, uint8_t **pbytes)
747 struct cli_smb_state *state = tevent_req_data(
748 req, struct cli_smb_state);
749 NTSTATUS status = NT_STATUS_OK;
752 size_t wct_ofs, bytes_offset;
755 if (tevent_req_is_nterror(req, &status)) {
759 if (state->inbuf == NULL) {
761 return NT_STATUS_INVALID_NETWORK_RESPONSE;
778 /* This was a request without a reply */
783 cmd = CVAL(state->inbuf, smb_com);
785 for (i=0; i<state->chain_num; i++) {
786 if (i < state->chain_num-1) {
788 return NT_STATUS_REQUEST_ABORTED;
790 if (!is_andx_req(cmd)) {
791 return NT_STATUS_INVALID_NETWORK_RESPONSE;
795 if (!have_andx_command((char *)state->inbuf, wct_ofs)) {
797 * This request was not completed because a previous
798 * request in the chain had received an error.
800 return NT_STATUS_REQUEST_ABORTED;
803 wct_ofs = SVAL(state->inbuf, wct_ofs + 3);
806 * Skip the all-present length field. No overflow, we've just
807 * put a 16-bit value into a size_t.
811 if (wct_ofs+2 > talloc_get_size(state->inbuf)) {
812 return NT_STATUS_INVALID_NETWORK_RESPONSE;
815 cmd = CVAL(state->inbuf, wct_ofs + 1);
818 state->cli->raw_status = cli_pull_raw_error(state->inbuf);
819 if (NT_STATUS_IS_DOS(state->cli->raw_status)) {
820 uint8_t eclass = NT_STATUS_DOS_CLASS(state->cli->raw_status);
821 uint16_t ecode = NT_STATUS_DOS_CODE(state->cli->raw_status);
823 * TODO: is it really a good idea to do a mapping here?
825 * The old cli_pull_error() also does it, so I do not change
828 status = dos_to_ntstatus(eclass, ecode);
830 status = state->cli->raw_status;
833 if (!have_andx_command((char *)state->inbuf, wct_ofs)) {
835 if ((cmd == SMBsesssetupX)
837 status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
839 * NT_STATUS_MORE_PROCESSING_REQUIRED is a
840 * valid return code for session setup
845 if (NT_STATUS_IS_ERR(status)) {
847 * The last command takes the error code. All
848 * further commands down the requested chain
849 * will get a NT_STATUS_REQUEST_ABORTED.
857 wct = CVAL(state->inbuf, wct_ofs);
858 bytes_offset = wct_ofs + 1 + wct * sizeof(uint16_t);
859 num_bytes = SVAL(state->inbuf, bytes_offset);
862 return NT_STATUS_INVALID_NETWORK_RESPONSE;
866 * wct_ofs is a 16-bit value plus 4, wct is a 8-bit value, num_bytes
867 * is a 16-bit value. So bytes_offset being size_t should be far from
870 if ((bytes_offset + 2 > talloc_get_size(state->inbuf))
871 || (bytes_offset > 0xffff)) {
872 return NT_STATUS_INVALID_NETWORK_RESPONSE;
879 *pvwv = (uint16_t *)(state->inbuf + wct_ofs + 1);
881 if (pnum_bytes != NULL) {
882 *pnum_bytes = num_bytes;
884 if (pbytes != NULL) {
885 *pbytes = (uint8_t *)state->inbuf + bytes_offset + 2;
887 if ((mem_ctx != NULL) && (pinbuf != NULL)) {
888 if (state->chain_num == state->chain_length-1) {
889 *pinbuf = talloc_move(mem_ctx, &state->inbuf);
891 *pinbuf = state->inbuf;
898 size_t cli_smb_wct_ofs(struct tevent_req **reqs, int num_reqs)
903 wct_ofs = smb_wct - 4;
905 for (i=0; i<num_reqs; i++) {
906 struct cli_smb_state *state;
907 state = tevent_req_data(reqs[i], struct cli_smb_state);
908 wct_ofs += iov_len(state->iov+1, state->iov_count-1);
909 wct_ofs = (wct_ofs + 3) & ~3;
914 NTSTATUS cli_smb_chain_send(struct tevent_req **reqs, int num_reqs)
916 struct cli_smb_state *first_state = tevent_req_data(
917 reqs[0], struct cli_smb_state);
918 struct cli_smb_state *last_state = tevent_req_data(
919 reqs[num_reqs-1], struct cli_smb_state);
920 struct cli_smb_state *state;
922 size_t chain_padding = 0;
924 struct iovec *iov = NULL;
925 struct iovec *this_iov;
929 for (i=0; i<num_reqs; i++) {
930 state = tevent_req_data(reqs[i], struct cli_smb_state);
931 iovlen += state->iov_count;
934 iov = talloc_array(last_state, struct iovec, iovlen);
936 return NT_STATUS_NO_MEMORY;
939 first_state->chained_requests = (struct tevent_req **)talloc_memdup(
940 last_state, reqs, sizeof(*reqs) * num_reqs);
941 if (first_state->chained_requests == NULL) {
943 return NT_STATUS_NO_MEMORY;
946 wct_offset = smb_wct - 4;
949 for (i=0; i<num_reqs; i++) {
950 size_t next_padding = 0;
953 state = tevent_req_data(reqs[i], struct cli_smb_state);
955 if (i < num_reqs-1) {
956 if (!is_andx_req(CVAL(state->header, smb_com))
957 || CVAL(state->header, smb_wct) < 2) {
959 TALLOC_FREE(first_state->chained_requests);
960 return NT_STATUS_INVALID_PARAMETER;
964 wct_offset += iov_len(state->iov+1, state->iov_count-1) + 1;
965 if ((wct_offset % 4) != 0) {
966 next_padding = 4 - (wct_offset % 4);
968 wct_offset += next_padding;
971 if (i < num_reqs-1) {
972 struct cli_smb_state *next_state = tevent_req_data(
973 reqs[i+1], struct cli_smb_state);
974 SCVAL(vwv+0, 0, CVAL(next_state->header, smb_com));
976 SSVAL(vwv+1, 0, wct_offset);
977 } else if (is_andx_req(CVAL(state->header, smb_com))) {
978 /* properly end the chain */
979 SCVAL(vwv+0, 0, 0xff);
980 SCVAL(vwv+0, 1, 0xff);
985 this_iov[0] = state->iov[0];
988 * This one is a bit subtle. We have to add
989 * chain_padding bytes between the requests, and we
990 * have to also include the wct field of the
991 * subsequent requests. We use the subsequent header
992 * for the padding, it contains the wct field in its
995 this_iov[0].iov_len = chain_padding+1;
996 this_iov[0].iov_base = (void *)&state->header[
997 sizeof(state->header) - this_iov[0].iov_len];
998 memset(this_iov[0].iov_base, 0, this_iov[0].iov_len-1);
1000 memcpy(this_iov+1, state->iov+1,
1001 sizeof(struct iovec) * (state->iov_count-1));
1002 this_iov += state->iov_count;
1003 chain_padding = next_padding;
1006 status = cli_smb_req_iov_send(reqs[0], last_state, iov, iovlen);
1007 if (!NT_STATUS_IS_OK(status)) {
1009 TALLOC_FREE(first_state->chained_requests);
1013 return NT_STATUS_OK;
1016 bool cli_has_async_calls(struct cli_state *cli)
1018 return ((tevent_queue_length(cli->conn.outgoing) != 0)
1019 || (talloc_array_length(cli->conn.pending) != 0));
1022 struct cli_smb_oplock_break_waiter_state {
1027 static void cli_smb_oplock_break_waiter_done(struct tevent_req *subreq);
1029 struct tevent_req *cli_smb_oplock_break_waiter_send(TALLOC_CTX *mem_ctx,
1030 struct event_context *ev,
1031 struct cli_state *cli)
1033 struct tevent_req *req, *subreq;
1034 struct cli_smb_oplock_break_waiter_state *state;
1035 struct cli_smb_state *smb_state;
1037 req = tevent_req_create(mem_ctx, &state,
1038 struct cli_smb_oplock_break_waiter_state);
1044 * Create a fake SMB request that we will never send out. This is only
1045 * used to be set into the pending queue with the right mid.
1047 subreq = cli_smb_req_create(mem_ctx, ev, cli, 0, 0, 0, NULL, 0, NULL);
1048 if (tevent_req_nomem(subreq, req)) {
1049 return tevent_req_post(req, ev);
1051 smb_state = tevent_req_data(subreq, struct cli_smb_state);
1052 SSVAL(smb_state->header, smb_mid, 0xffff);
1054 if (!cli_smb_req_set_pending(subreq)) {
1055 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
1056 return tevent_req_post(req, ev);
1058 tevent_req_set_callback(subreq, cli_smb_oplock_break_waiter_done, req);
1062 static void cli_smb_oplock_break_waiter_done(struct tevent_req *subreq)
1064 struct tevent_req *req = tevent_req_callback_data(
1065 subreq, struct tevent_req);
1066 struct cli_smb_oplock_break_waiter_state *state = tevent_req_data(
1067 req, struct cli_smb_oplock_break_waiter_state);
1075 status = cli_smb_recv(subreq, state, &inbuf, 8, &wct, &vwv,
1076 &num_bytes, &bytes);
1077 TALLOC_FREE(subreq);
1078 if (!NT_STATUS_IS_OK(status)) {
1079 tevent_req_nterror(req, status);
1082 state->fnum = SVAL(vwv+2, 0);
1083 state->level = CVAL(vwv+3, 1);
1084 tevent_req_done(req);
1087 NTSTATUS cli_smb_oplock_break_waiter_recv(struct tevent_req *req,
1091 struct cli_smb_oplock_break_waiter_state *state = tevent_req_data(
1092 req, struct cli_smb_oplock_break_waiter_state);
1095 if (tevent_req_is_nterror(req, &status)) {
1098 *pfnum = state->fnum;
1099 *plevel = state->level;
1100 return NT_STATUS_OK;
1104 struct cli_session_request_state {
1105 struct tevent_context *ev;
1108 struct iovec iov[3];
1109 uint8_t nb_session_response;
1112 static void cli_session_request_sent(struct tevent_req *subreq);
1113 static void cli_session_request_recvd(struct tevent_req *subreq);
1115 struct tevent_req *cli_session_request_send(TALLOC_CTX *mem_ctx,
1116 struct tevent_context *ev,
1118 const struct nmb_name *called,
1119 const struct nmb_name *calling)
1121 struct tevent_req *req, *subreq;
1122 struct cli_session_request_state *state;
1124 req = tevent_req_create(mem_ctx, &state,
1125 struct cli_session_request_state);
1132 state->iov[1].iov_base = name_mangle(
1133 state, called->name, called->name_type);
1134 if (tevent_req_nomem(state->iov[1].iov_base, req)) {
1135 return tevent_req_post(req, ev);
1137 state->iov[1].iov_len = name_len(
1138 (unsigned char *)state->iov[1].iov_base,
1139 talloc_get_size(state->iov[1].iov_base));
1141 state->iov[2].iov_base = name_mangle(
1142 state, calling->name, calling->name_type);
1143 if (tevent_req_nomem(state->iov[2].iov_base, req)) {
1144 return tevent_req_post(req, ev);
1146 state->iov[2].iov_len = name_len(
1147 (unsigned char *)state->iov[2].iov_base,
1148 talloc_get_size(state->iov[2].iov_base));
1150 _smb_setlen(((char *)&state->len_hdr),
1151 state->iov[1].iov_len + state->iov[2].iov_len);
1152 SCVAL((char *)&state->len_hdr, 0, 0x81);
1154 state->iov[0].iov_base = &state->len_hdr;
1155 state->iov[0].iov_len = sizeof(state->len_hdr);
1157 subreq = writev_send(state, ev, NULL, sock, true, state->iov, 3);
1158 if (tevent_req_nomem(subreq, req)) {
1159 return tevent_req_post(req, ev);
1161 tevent_req_set_callback(subreq, cli_session_request_sent, req);
1165 static void cli_session_request_sent(struct tevent_req *subreq)
1167 struct tevent_req *req = tevent_req_callback_data(
1168 subreq, struct tevent_req);
1169 struct cli_session_request_state *state = tevent_req_data(
1170 req, struct cli_session_request_state);
1174 ret = writev_recv(subreq, &err);
1175 TALLOC_FREE(subreq);
1177 tevent_req_error(req, err);
1180 subreq = read_smb_send(state, state->ev, state->sock);
1181 if (tevent_req_nomem(subreq, req)) {
1184 tevent_req_set_callback(subreq, cli_session_request_recvd, req);
1187 static void cli_session_request_recvd(struct tevent_req *subreq)
1189 struct tevent_req *req = tevent_req_callback_data(
1190 subreq, struct tevent_req);
1191 struct cli_session_request_state *state = tevent_req_data(
1192 req, struct cli_session_request_state);
1197 ret = read_smb_recv(subreq, talloc_tos(), &buf, &err);
1198 TALLOC_FREE(subreq);
1205 tevent_req_error(req, err);
1209 * In case of an error there is more information in the data
1210 * portion according to RFC1002. We're not subtle enough to
1211 * respond to the different error conditions, so drop the
1214 state->nb_session_response = CVAL(buf, 0);
1215 tevent_req_done(req);
1218 bool cli_session_request_recv(struct tevent_req *req, int *err, uint8_t *resp)
1220 struct cli_session_request_state *state = tevent_req_data(
1221 req, struct cli_session_request_state);
1223 if (tevent_req_is_unix_error(req, err)) {
1226 *resp = state->nb_session_response;