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->pending);
103 if ((result == 0) || (result == 0xffff)) {
107 for (i=0; i<num_pending; i++) {
108 if (result == cli_smb_req_mid(cli->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->pending);
127 if (state->mid != 0) {
129 * This is a [nt]trans[2] request which waits
130 * for more than one reply.
135 if (num_pending == 1) {
137 * The pending read_smb tevent_req is a child of
138 * cli->pending. So if nothing is pending anymore, we need to
139 * delete the socket read fde.
141 TALLOC_FREE(cli->pending);
145 for (i=0; i<num_pending; i++) {
146 if (req == cli->pending[i]) {
150 if (i == num_pending) {
152 * Something's seriously broken. Just returning here is the
153 * right thing nevertheless, the point of this routine is to
154 * remove ourselves from cli->pending.
160 * Remove ourselves from the cli->pending array
162 cli->pending[i] = cli->pending[num_pending-1];
165 * No NULL check here, we're shrinking by sizeof(void *), and
166 * talloc_realloc just adjusts the size for this.
168 cli->pending = talloc_realloc(NULL, cli->pending, struct tevent_req *,
173 static int cli_smb_req_destructor(struct tevent_req *req)
175 struct cli_smb_state *state = tevent_req_data(
176 req, struct cli_smb_state);
178 * Make sure we really remove it from
179 * the pending array on destruction.
182 cli_smb_req_unset_pending(req);
186 static void cli_smb_received(struct tevent_req *subreq);
188 bool cli_smb_req_set_pending(struct tevent_req *req)
190 struct cli_smb_state *state = tevent_req_data(
191 req, struct cli_smb_state);
192 struct cli_state *cli;
193 struct tevent_req **pending;
195 struct tevent_req *subreq;
198 num_pending = talloc_array_length(cli->pending);
200 pending = talloc_realloc(cli, cli->pending, struct tevent_req *,
202 if (pending == NULL) {
205 pending[num_pending] = req;
206 cli->pending = pending;
207 talloc_set_destructor(req, cli_smb_req_destructor);
209 if (num_pending > 0) {
214 * We're the first ones, add the read_smb request that waits for the
215 * answer from the server
217 subreq = read_smb_send(cli->pending, state->ev, cli->fd);
218 if (subreq == NULL) {
219 cli_smb_req_unset_pending(req);
222 tevent_req_set_callback(subreq, cli_smb_received, cli);
227 * Fetch a smb request's mid. Only valid after the request has been sent by
228 * cli_smb_req_send().
230 uint16_t cli_smb_req_mid(struct tevent_req *req)
232 struct cli_smb_state *state = tevent_req_data(
233 req, struct cli_smb_state);
234 return SVAL(state->header, smb_mid);
237 void cli_smb_req_set_mid(struct tevent_req *req, uint16_t mid)
239 struct cli_smb_state *state = tevent_req_data(
240 req, struct cli_smb_state);
244 uint32_t cli_smb_req_seqnum(struct tevent_req *req)
246 struct cli_smb_state *state = tevent_req_data(
247 req, struct cli_smb_state);
248 return state->seqnum;
251 void cli_smb_req_set_seqnum(struct tevent_req *req, uint32_t seqnum)
253 struct cli_smb_state *state = tevent_req_data(
254 req, struct cli_smb_state);
255 state->seqnum = seqnum;
258 static size_t iov_len(const struct iovec *iov, int count)
262 for (i=0; i<count; i++) {
263 result += iov[i].iov_len;
268 static uint8_t *iov_concat(TALLOC_CTX *mem_ctx, const struct iovec *iov,
271 size_t len = iov_len(iov, count);
276 buf = talloc_array(mem_ctx, uint8_t, len);
281 for (i=0; i<count; i++) {
282 memcpy(buf+copied, iov[i].iov_base, iov[i].iov_len);
283 copied += iov[i].iov_len;
288 struct tevent_req *cli_smb_req_create(TALLOC_CTX *mem_ctx,
289 struct event_context *ev,
290 struct cli_state *cli,
292 uint8_t additional_flags,
293 uint8_t wct, uint16_t *vwv,
295 struct iovec *bytes_iov)
297 struct tevent_req *result;
298 struct cli_smb_state *state;
299 struct timeval endtime;
301 if (iov_count > MAX_SMB_IOV) {
303 * Should not happen :-)
308 result = tevent_req_create(mem_ctx, &state, struct cli_smb_state);
309 if (result == NULL) {
314 state->mid = 0; /* Set to auto-choose in cli_smb_req_send */
315 state->chain_num = 0;
316 state->chained_requests = NULL;
318 cli_setup_packet_buf(cli, (char *)state->header);
319 SCVAL(state->header, smb_com, smb_command);
320 SSVAL(state->header, smb_tid, cli->cnum);
321 SCVAL(state->header, smb_wct, wct);
325 SSVAL(state->bytecount_buf, 0, iov_len(bytes_iov, iov_count));
327 state->iov[0].iov_base = (void *)state->header;
328 state->iov[0].iov_len = sizeof(state->header);
329 state->iov[1].iov_base = (void *)state->vwv;
330 state->iov[1].iov_len = wct * sizeof(uint16_t);
331 state->iov[2].iov_base = (void *)state->bytecount_buf;
332 state->iov[2].iov_len = sizeof(uint16_t);
334 if (iov_count != 0) {
335 memcpy(&state->iov[3], bytes_iov,
336 iov_count * sizeof(*bytes_iov));
338 state->iov_count = iov_count + 3;
341 endtime = timeval_current_ofs_msec(cli->timeout);
342 if (!tevent_req_set_endtime(result, ev, endtime)) {
343 tevent_req_oom(result);
349 static NTSTATUS cli_signv(struct cli_state *cli, struct iovec *iov, int count,
355 * Obvious optimization: Make cli_calculate_sign_mac work with struct
356 * iovec directly. MD5Update would do that just fine.
359 if ((count <= 0) || (iov[0].iov_len < smb_wct)) {
360 return NT_STATUS_INVALID_PARAMETER;
363 buf = iov_concat(talloc_tos(), iov, count);
365 return NT_STATUS_NO_MEMORY;
368 cli_calculate_sign_mac(cli, (char *)buf, seqnum);
369 memcpy(iov[0].iov_base, buf, iov[0].iov_len);
375 static void cli_smb_sent(struct tevent_req *subreq);
377 static NTSTATUS cli_smb_req_iov_send(struct tevent_req *req,
378 struct cli_smb_state *state,
379 struct iovec *iov, int iov_count)
381 struct tevent_req *subreq;
384 if (state->cli->fd == -1) {
385 return NT_STATUS_CONNECTION_INVALID;
388 if (iov[0].iov_len < smb_wct) {
389 return NT_STATUS_INVALID_PARAMETER;
392 if (state->mid != 0) {
393 SSVAL(iov[0].iov_base, smb_mid, state->mid);
395 uint16_t mid = cli_alloc_mid(state->cli);
396 SSVAL(iov[0].iov_base, smb_mid, mid);
399 smb_setlen((char *)iov[0].iov_base, iov_len(iov, iov_count) - 4);
401 status = cli_signv(state->cli, iov, iov_count, &state->seqnum);
403 if (!NT_STATUS_IS_OK(status)) {
407 if (cli_encryption_on(state->cli)) {
410 buf = (char *)iov_concat(talloc_tos(), iov, iov_count);
412 return NT_STATUS_NO_MEMORY;
414 status = common_encrypt_buffer(state->cli->trans_enc_state,
415 (char *)buf, &enc_buf);
417 if (!NT_STATUS_IS_OK(status)) {
418 DEBUG(0, ("Error in encrypting client message: %s\n",
422 buf = (char *)talloc_memdup(state, enc_buf,
426 return NT_STATUS_NO_MEMORY;
428 iov[0].iov_base = (void *)buf;
429 iov[0].iov_len = talloc_get_size(buf);
432 subreq = writev_send(state, state->ev, state->cli->outgoing,
433 state->cli->fd, false, iov, iov_count);
434 if (subreq == NULL) {
435 return NT_STATUS_NO_MEMORY;
437 tevent_req_set_callback(subreq, cli_smb_sent, req);
441 NTSTATUS cli_smb_req_send(struct tevent_req *req)
443 struct cli_smb_state *state = tevent_req_data(
444 req, struct cli_smb_state);
446 return cli_smb_req_iov_send(req, state, state->iov, state->iov_count);
449 struct tevent_req *cli_smb_send(TALLOC_CTX *mem_ctx,
450 struct event_context *ev,
451 struct cli_state *cli,
453 uint8_t additional_flags,
454 uint8_t wct, uint16_t *vwv,
456 const uint8_t *bytes)
458 struct tevent_req *req;
462 iov.iov_base = discard_const_p(void, bytes);
463 iov.iov_len = num_bytes;
465 req = cli_smb_req_create(mem_ctx, ev, cli, smb_command,
466 additional_flags, wct, vwv, 1, &iov);
471 status = cli_smb_req_send(req);
472 if (!NT_STATUS_IS_OK(status)) {
473 tevent_req_nterror(req, status);
474 return tevent_req_post(req, ev);
479 static void cli_smb_sent(struct tevent_req *subreq)
481 struct tevent_req *req = tevent_req_callback_data(
482 subreq, struct tevent_req);
483 struct cli_smb_state *state = tevent_req_data(
484 req, struct cli_smb_state);
488 nwritten = writev_recv(subreq, &err);
490 if (nwritten == -1) {
491 if (state->cli->fd != -1) {
492 close(state->cli->fd);
495 tevent_req_nterror(req, map_nt_error_from_unix(err));
499 switch (CVAL(state->header, smb_com)) {
505 tevent_req_done(req);
508 if ((CVAL(state->header, smb_wct) == 8) &&
509 (CVAL(state->vwv+3, 0) == LOCKING_ANDX_OPLOCK_RELEASE)) {
511 tevent_req_done(req);
516 if (!cli_smb_req_set_pending(req)) {
517 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
522 static void cli_smb_received(struct tevent_req *subreq)
524 struct cli_state *cli = tevent_req_callback_data(
525 subreq, struct cli_state);
526 struct tevent_req *req;
527 struct cli_smb_state *state;
536 received = read_smb_recv(subreq, talloc_tos(), &inbuf, &err);
538 if (received == -1) {
543 status = map_nt_error_from_unix(err);
547 if ((IVAL(inbuf, 4) != 0x424d53ff) /* 0xFF"SMB" */
548 && (SVAL(inbuf, 4) != 0x45ff)) /* 0xFF"E" */ {
549 DEBUG(10, ("Got non-SMB PDU\n"));
550 status = NT_STATUS_INVALID_NETWORK_RESPONSE;
554 if (cli_encryption_on(cli) && (CVAL(inbuf, 0) == 0)) {
555 uint16_t enc_ctx_num;
557 status = get_enc_ctx_num(inbuf, &enc_ctx_num);
558 if (!NT_STATUS_IS_OK(status)) {
559 DEBUG(10, ("get_enc_ctx_num returned %s\n",
564 if (enc_ctx_num != cli->trans_enc_state->enc_ctx_num) {
565 DEBUG(10, ("wrong enc_ctx %d, expected %d\n",
567 cli->trans_enc_state->enc_ctx_num));
568 status = NT_STATUS_INVALID_HANDLE;
572 status = common_decrypt_buffer(cli->trans_enc_state,
574 if (!NT_STATUS_IS_OK(status)) {
575 DEBUG(10, ("common_decrypt_buffer returned %s\n",
581 mid = SVAL(inbuf, smb_mid);
582 num_pending = talloc_array_length(cli->pending);
584 for (i=0; i<num_pending; i++) {
585 if (mid == cli_smb_req_mid(cli->pending[i])) {
589 if (i == num_pending) {
590 /* Dump unexpected reply */
595 oplock_break = false;
599 * Paranoia checks that this is really an oplock break request.
601 oplock_break = (smb_len(inbuf) == 51); /* hdr + 8 words */
602 oplock_break &= ((CVAL(inbuf, smb_flg) & FLAG_REPLY) == 0);
603 oplock_break &= (CVAL(inbuf, smb_com) == SMBlockingX);
604 oplock_break &= (SVAL(inbuf, smb_vwv6) == 0);
605 oplock_break &= (SVAL(inbuf, smb_vwv7) == 0);
608 /* Dump unexpected reply */
614 req = cli->pending[i];
615 state = tevent_req_data(req, struct cli_smb_state);
617 if (!oplock_break /* oplock breaks are not signed */
618 && !cli_check_sign_mac(cli, (char *)inbuf, state->seqnum+1)) {
619 DEBUG(10, ("cli_check_sign_mac failed\n"));
621 status = NT_STATUS_ACCESS_DENIED;
627 if (state->chained_requests == NULL) {
628 state->inbuf = talloc_move(state, &inbuf);
629 talloc_set_destructor(req, NULL);
630 cli_smb_req_unset_pending(req);
631 state->chain_num = 0;
632 state->chain_length = 1;
633 tevent_req_done(req);
635 struct tevent_req **chain = talloc_move(
636 talloc_tos(), &state->chained_requests);
637 int num_chained = talloc_array_length(chain);
639 for (i=0; i<num_chained; i++) {
640 state = tevent_req_data(chain[i], struct
642 state->inbuf = inbuf;
643 state->chain_num = i;
644 state->chain_length = num_chained;
645 tevent_req_done(chain[i]);
651 if (talloc_array_length(cli->pending) > 0) {
653 * Set up another read request for the other pending cli_smb
656 state = tevent_req_data(cli->pending[0], struct cli_smb_state);
657 subreq = read_smb_send(cli->pending, state->ev, cli->fd);
658 if (subreq == NULL) {
659 status = NT_STATUS_NO_MEMORY;
662 tevent_req_set_callback(subreq, cli_smb_received, cli);
667 * Cancel all pending requests. We don't do a for-loop walking
668 * cli->pending because that array changes in
669 * cli_smb_req_destructor().
671 while (talloc_array_length(cli->pending) > 0) {
672 req = cli->pending[0];
673 talloc_set_destructor(req, NULL);
674 cli_smb_req_unset_pending(req);
675 tevent_req_nterror(req, status);
679 NTSTATUS cli_smb_recv(struct tevent_req *req,
680 TALLOC_CTX *mem_ctx, uint8_t **pinbuf,
681 uint8_t min_wct, uint8_t *pwct, uint16_t **pvwv,
682 uint32_t *pnum_bytes, uint8_t **pbytes)
684 struct cli_smb_state *state = tevent_req_data(
685 req, struct cli_smb_state);
686 NTSTATUS status = NT_STATUS_OK;
689 size_t wct_ofs, bytes_offset;
692 if (tevent_req_is_nterror(req, &status)) {
696 if (state->inbuf == NULL) {
698 return NT_STATUS_INVALID_NETWORK_RESPONSE;
715 /* This was a request without a reply */
720 cmd = CVAL(state->inbuf, smb_com);
722 for (i=0; i<state->chain_num; i++) {
723 if (i < state->chain_num-1) {
725 return NT_STATUS_REQUEST_ABORTED;
727 if (!is_andx_req(cmd)) {
728 return NT_STATUS_INVALID_NETWORK_RESPONSE;
732 if (!have_andx_command((char *)state->inbuf, wct_ofs)) {
734 * This request was not completed because a previous
735 * request in the chain had received an error.
737 return NT_STATUS_REQUEST_ABORTED;
740 wct_ofs = SVAL(state->inbuf, wct_ofs + 3);
743 * Skip the all-present length field. No overflow, we've just
744 * put a 16-bit value into a size_t.
748 if (wct_ofs+2 > talloc_get_size(state->inbuf)) {
749 return NT_STATUS_INVALID_NETWORK_RESPONSE;
752 cmd = CVAL(state->inbuf, wct_ofs + 1);
755 state->cli->raw_status = cli_pull_raw_error(state->inbuf);
756 if (NT_STATUS_IS_DOS(state->cli->raw_status)) {
757 uint8_t eclass = NT_STATUS_DOS_CLASS(state->cli->raw_status);
758 uint16_t ecode = NT_STATUS_DOS_CODE(state->cli->raw_status);
760 * TODO: is it really a good idea to do a mapping here?
762 * The old cli_pull_error() also does it, so I do not change
765 status = dos_to_ntstatus(eclass, ecode);
767 status = state->cli->raw_status;
770 if (!have_andx_command((char *)state->inbuf, wct_ofs)) {
772 if ((cmd == SMBsesssetupX)
774 status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
776 * NT_STATUS_MORE_PROCESSING_REQUIRED is a
777 * valid return code for session setup
782 if (NT_STATUS_IS_ERR(status)) {
784 * The last command takes the error code. All
785 * further commands down the requested chain
786 * will get a NT_STATUS_REQUEST_ABORTED.
794 wct = CVAL(state->inbuf, wct_ofs);
795 bytes_offset = wct_ofs + 1 + wct * sizeof(uint16_t);
796 num_bytes = SVAL(state->inbuf, bytes_offset);
799 return NT_STATUS_INVALID_NETWORK_RESPONSE;
803 * wct_ofs is a 16-bit value plus 4, wct is a 8-bit value, num_bytes
804 * is a 16-bit value. So bytes_offset being size_t should be far from
807 if ((bytes_offset + 2 > talloc_get_size(state->inbuf))
808 || (bytes_offset > 0xffff)) {
809 return NT_STATUS_INVALID_NETWORK_RESPONSE;
816 *pvwv = (uint16_t *)(state->inbuf + wct_ofs + 1);
818 if (pnum_bytes != NULL) {
819 *pnum_bytes = num_bytes;
821 if (pbytes != NULL) {
822 *pbytes = (uint8_t *)state->inbuf + bytes_offset + 2;
824 if ((mem_ctx != NULL) && (pinbuf != NULL)) {
825 if (state->chain_num == state->chain_length-1) {
826 *pinbuf = talloc_move(mem_ctx, &state->inbuf);
828 *pinbuf = state->inbuf;
835 size_t cli_smb_wct_ofs(struct tevent_req **reqs, int num_reqs)
840 wct_ofs = smb_wct - 4;
842 for (i=0; i<num_reqs; i++) {
843 struct cli_smb_state *state;
844 state = tevent_req_data(reqs[i], struct cli_smb_state);
845 wct_ofs += iov_len(state->iov+1, state->iov_count-1);
846 wct_ofs = (wct_ofs + 3) & ~3;
851 NTSTATUS cli_smb_chain_send(struct tevent_req **reqs, int num_reqs)
853 struct cli_smb_state *first_state = tevent_req_data(
854 reqs[0], struct cli_smb_state);
855 struct cli_smb_state *last_state = tevent_req_data(
856 reqs[num_reqs-1], struct cli_smb_state);
857 struct cli_smb_state *state;
859 size_t chain_padding = 0;
861 struct iovec *iov = NULL;
862 struct iovec *this_iov;
866 for (i=0; i<num_reqs; i++) {
867 state = tevent_req_data(reqs[i], struct cli_smb_state);
868 iovlen += state->iov_count;
871 iov = talloc_array(last_state, struct iovec, iovlen);
873 return NT_STATUS_NO_MEMORY;
876 first_state->chained_requests = (struct tevent_req **)talloc_memdup(
877 last_state, reqs, sizeof(*reqs) * num_reqs);
878 if (first_state->chained_requests == NULL) {
880 return NT_STATUS_NO_MEMORY;
883 wct_offset = smb_wct - 4;
886 for (i=0; i<num_reqs; i++) {
887 size_t next_padding = 0;
890 state = tevent_req_data(reqs[i], struct cli_smb_state);
892 if (i < num_reqs-1) {
893 if (!is_andx_req(CVAL(state->header, smb_com))
894 || CVAL(state->header, smb_wct) < 2) {
896 TALLOC_FREE(first_state->chained_requests);
897 return NT_STATUS_INVALID_PARAMETER;
901 wct_offset += iov_len(state->iov+1, state->iov_count-1) + 1;
902 if ((wct_offset % 4) != 0) {
903 next_padding = 4 - (wct_offset % 4);
905 wct_offset += next_padding;
908 if (i < num_reqs-1) {
909 struct cli_smb_state *next_state = tevent_req_data(
910 reqs[i+1], struct cli_smb_state);
911 SCVAL(vwv+0, 0, CVAL(next_state->header, smb_com));
913 SSVAL(vwv+1, 0, wct_offset);
914 } else if (is_andx_req(CVAL(state->header, smb_com))) {
915 /* properly end the chain */
916 SCVAL(vwv+0, 0, 0xff);
917 SCVAL(vwv+0, 1, 0xff);
922 this_iov[0] = state->iov[0];
925 * This one is a bit subtle. We have to add
926 * chain_padding bytes between the requests, and we
927 * have to also include the wct field of the
928 * subsequent requests. We use the subsequent header
929 * for the padding, it contains the wct field in its
932 this_iov[0].iov_len = chain_padding+1;
933 this_iov[0].iov_base = (void *)&state->header[
934 sizeof(state->header) - this_iov[0].iov_len];
935 memset(this_iov[0].iov_base, 0, this_iov[0].iov_len-1);
937 memcpy(this_iov+1, state->iov+1,
938 sizeof(struct iovec) * (state->iov_count-1));
939 this_iov += state->iov_count;
940 chain_padding = next_padding;
943 status = cli_smb_req_iov_send(reqs[0], last_state, iov, iovlen);
944 if (!NT_STATUS_IS_OK(status)) {
946 TALLOC_FREE(first_state->chained_requests);
953 uint8_t *cli_smb_inbuf(struct tevent_req *req)
955 struct cli_smb_state *state = tevent_req_data(
956 req, struct cli_smb_state);
960 bool cli_has_async_calls(struct cli_state *cli)
962 return ((tevent_queue_length(cli->outgoing) != 0)
963 || (talloc_array_length(cli->pending) != 0));
966 struct cli_smb_oplock_break_waiter_state {
971 static void cli_smb_oplock_break_waiter_done(struct tevent_req *subreq);
973 struct tevent_req *cli_smb_oplock_break_waiter_send(TALLOC_CTX *mem_ctx,
974 struct event_context *ev,
975 struct cli_state *cli)
977 struct tevent_req *req, *subreq;
978 struct cli_smb_oplock_break_waiter_state *state;
979 struct cli_smb_state *smb_state;
981 req = tevent_req_create(mem_ctx, &state,
982 struct cli_smb_oplock_break_waiter_state);
988 * Create a fake SMB request that we will never send out. This is only
989 * used to be set into the pending queue with the right mid.
991 subreq = cli_smb_req_create(mem_ctx, ev, cli, 0, 0, 0, NULL, 0, NULL);
992 if (tevent_req_nomem(subreq, req)) {
993 return tevent_req_post(req, ev);
995 smb_state = tevent_req_data(subreq, struct cli_smb_state);
996 SSVAL(smb_state->header, smb_mid, 0xffff);
998 if (!cli_smb_req_set_pending(subreq)) {
999 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
1000 return tevent_req_post(req, ev);
1002 tevent_req_set_callback(subreq, cli_smb_oplock_break_waiter_done, req);
1006 static void cli_smb_oplock_break_waiter_done(struct tevent_req *subreq)
1008 struct tevent_req *req = tevent_req_callback_data(
1009 subreq, struct tevent_req);
1010 struct cli_smb_oplock_break_waiter_state *state = tevent_req_data(
1011 req, struct cli_smb_oplock_break_waiter_state);
1019 status = cli_smb_recv(subreq, state, &inbuf, 8, &wct, &vwv,
1020 &num_bytes, &bytes);
1021 TALLOC_FREE(subreq);
1022 if (!NT_STATUS_IS_OK(status)) {
1023 tevent_req_nterror(req, status);
1026 state->fnum = SVAL(vwv+2, 0);
1027 state->level = CVAL(vwv+3, 1);
1028 tevent_req_done(req);
1031 NTSTATUS cli_smb_oplock_break_waiter_recv(struct tevent_req *req,
1035 struct cli_smb_oplock_break_waiter_state *state = tevent_req_data(
1036 req, struct cli_smb_oplock_break_waiter_state);
1039 if (tevent_req_is_nterror(req, &status)) {
1042 *pfnum = state->fnum;
1043 *plevel = state->level;
1044 return NT_STATUS_OK;
1048 struct cli_session_request_state {
1049 struct tevent_context *ev;
1052 struct iovec iov[3];
1053 uint8_t nb_session_response;
1056 static void cli_session_request_sent(struct tevent_req *subreq);
1057 static void cli_session_request_recvd(struct tevent_req *subreq);
1059 struct tevent_req *cli_session_request_send(TALLOC_CTX *mem_ctx,
1060 struct tevent_context *ev,
1062 const struct nmb_name *called,
1063 const struct nmb_name *calling)
1065 struct tevent_req *req, *subreq;
1066 struct cli_session_request_state *state;
1068 req = tevent_req_create(mem_ctx, &state,
1069 struct cli_session_request_state);
1076 state->iov[1].iov_base = name_mangle(
1077 state, called->name, called->name_type);
1078 if (tevent_req_nomem(state->iov[1].iov_base, req)) {
1079 return tevent_req_post(req, ev);
1081 state->iov[1].iov_len = name_len(
1082 (unsigned char *)state->iov[1].iov_base,
1083 talloc_get_size(state->iov[1].iov_base));
1085 state->iov[2].iov_base = name_mangle(
1086 state, calling->name, calling->name_type);
1087 if (tevent_req_nomem(state->iov[2].iov_base, req)) {
1088 return tevent_req_post(req, ev);
1090 state->iov[2].iov_len = name_len(
1091 (unsigned char *)state->iov[2].iov_base,
1092 talloc_get_size(state->iov[2].iov_base));
1094 _smb_setlen(((char *)&state->len_hdr),
1095 state->iov[1].iov_len + state->iov[2].iov_len);
1096 SCVAL((char *)&state->len_hdr, 0, 0x81);
1098 state->iov[0].iov_base = &state->len_hdr;
1099 state->iov[0].iov_len = sizeof(state->len_hdr);
1101 subreq = writev_send(state, ev, NULL, sock, true, state->iov, 3);
1102 if (tevent_req_nomem(subreq, req)) {
1103 return tevent_req_post(req, ev);
1105 tevent_req_set_callback(subreq, cli_session_request_sent, req);
1109 static void cli_session_request_sent(struct tevent_req *subreq)
1111 struct tevent_req *req = tevent_req_callback_data(
1112 subreq, struct tevent_req);
1113 struct cli_session_request_state *state = tevent_req_data(
1114 req, struct cli_session_request_state);
1118 ret = writev_recv(subreq, &err);
1119 TALLOC_FREE(subreq);
1121 tevent_req_error(req, err);
1124 subreq = read_smb_send(state, state->ev, state->sock);
1125 if (tevent_req_nomem(subreq, req)) {
1128 tevent_req_set_callback(subreq, cli_session_request_recvd, req);
1131 static void cli_session_request_recvd(struct tevent_req *subreq)
1133 struct tevent_req *req = tevent_req_callback_data(
1134 subreq, struct tevent_req);
1135 struct cli_session_request_state *state = tevent_req_data(
1136 req, struct cli_session_request_state);
1141 ret = read_smb_recv(subreq, talloc_tos(), &buf, &err);
1142 TALLOC_FREE(subreq);
1149 tevent_req_error(req, err);
1153 * In case of an error there is more information in the data
1154 * portion according to RFC1002. We're not subtle enough to
1155 * respond to the different error conditions, so drop the
1158 state->nb_session_response = CVAL(buf, 0);
1159 tevent_req_done(req);
1162 bool cli_session_request_recv(struct tevent_req *req, int *err, uint8_t *resp)
1164 struct cli_session_request_state *state = tevent_req_data(
1165 req, struct cli_session_request_state);
1167 if (tevent_req_is_unix_error(req, err)) {
1170 *resp = state->nb_session_response;