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/>.
23 * Read an smb packet asynchronously, discard keepalives
26 struct read_smb_state {
27 struct tevent_context *ev;
32 static ssize_t read_smb_more(uint8_t *buf, size_t buflen, void *private_data);
33 static void read_smb_done(struct tevent_req *subreq);
35 static struct tevent_req *read_smb_send(TALLOC_CTX *mem_ctx,
36 struct tevent_context *ev,
39 struct tevent_req *result, *subreq;
40 struct read_smb_state *state;
42 result = tevent_req_create(mem_ctx, &state, struct read_smb_state);
49 subreq = read_packet_send(state, ev, fd, 4, read_smb_more, NULL);
53 tevent_req_set_callback(subreq, read_smb_done, result);
60 static ssize_t read_smb_more(uint8_t *buf, size_t buflen, void *private_data)
63 return 0; /* We've been here, we're done */
65 return smb_len_large(buf);
68 static void read_smb_done(struct tevent_req *subreq)
70 struct tevent_req *req = tevent_req_callback_data(
71 subreq, struct tevent_req);
72 struct read_smb_state *state = tevent_req_data(
73 req, struct read_smb_state);
77 len = read_packet_recv(subreq, state, &state->buf, &err);
80 tevent_req_error(req, err);
84 if (CVAL(state->buf, 0) == SMBkeepalive) {
85 subreq = read_packet_send(state, state->ev, state->fd, 4,
87 if (tevent_req_nomem(subreq, req)) {
90 tevent_req_set_callback(subreq, read_smb_done, req);
96 static ssize_t read_smb_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
97 uint8_t **pbuf, int *perrno)
99 struct read_smb_state *state = tevent_req_data(
100 req, struct read_smb_state);
102 if (tevent_req_is_unix_error(req, perrno)) {
105 *pbuf = talloc_move(mem_ctx, &state->buf);
106 return talloc_get_size(*pbuf);
110 * Fetch an error out of a NBT packet
111 * @param[in] buf The SMB packet
112 * @retval The error, converted to NTSTATUS
115 NTSTATUS cli_pull_error(char *buf)
117 uint32_t flags2 = SVAL(buf, smb_flg2);
119 if (flags2 & FLAGS2_32_BIT_ERROR_CODES) {
120 return NT_STATUS(IVAL(buf, smb_rcls));
123 /* if the client uses dos errors, but there is no error,
124 we should return no error here, otherwise it looks
125 like an unknown bad NT_STATUS. jmcd */
126 if (CVAL(buf, smb_rcls) == 0)
129 return NT_STATUS_DOS(CVAL(buf, smb_rcls), SVAL(buf,smb_err));
133 * Compatibility helper for the sync APIs: Fake NTSTATUS in cli->inbuf
134 * @param[in] cli The client connection that just received an error
135 * @param[in] status The error to set on "cli"
138 void cli_set_error(struct cli_state *cli, NTSTATUS status)
140 uint32_t flags2 = SVAL(cli->inbuf, smb_flg2);
142 if (NT_STATUS_IS_DOS(status)) {
143 SSVAL(cli->inbuf, smb_flg2,
144 flags2 & ~FLAGS2_32_BIT_ERROR_CODES);
145 SCVAL(cli->inbuf, smb_rcls, NT_STATUS_DOS_CLASS(status));
146 SSVAL(cli->inbuf, smb_err, NT_STATUS_DOS_CODE(status));
150 SSVAL(cli->inbuf, smb_flg2, flags2 | FLAGS2_32_BIT_ERROR_CODES);
151 SIVAL(cli->inbuf, smb_rcls, NT_STATUS_V(status));
156 * Figure out if there is an andx command behind the current one
157 * @param[in] buf The smb buffer to look at
158 * @param[in] ofs The offset to the wct field that is followed by the cmd
159 * @retval Is there a command following?
162 static bool have_andx_command(const char *buf, uint16_t ofs)
165 size_t buflen = talloc_get_size(buf);
167 if ((ofs == buflen-1) || (ofs == buflen)) {
171 wct = CVAL(buf, ofs);
174 * Not enough space for the command and a following pointer
178 return (CVAL(buf, ofs+1) != 0xff);
181 #define MAX_SMB_IOV 5
183 struct cli_smb_state {
184 struct tevent_context *ev;
185 struct cli_state *cli;
186 uint8_t header[smb_wct+1]; /* Space for the header including the wct */
189 * For normal requests, cli_smb_req_send chooses a mid. Secondary
190 * trans requests need to use the mid of the primary request, so we
191 * need a place to store it. Assume it's set if != 0.
196 uint8_t bytecount_buf[2];
198 struct iovec iov[MAX_SMB_IOV+3];
204 struct tevent_req **chained_requests;
207 static uint16_t cli_alloc_mid(struct cli_state *cli)
209 int num_pending = talloc_array_length(cli->pending);
216 if ((result == 0) || (result == 0xffff)) {
220 for (i=0; i<num_pending; i++) {
221 if (result == cli_smb_req_mid(cli->pending[i])) {
226 if (i == num_pending) {
232 void cli_smb_req_unset_pending(struct tevent_req *req)
234 struct cli_smb_state *state = tevent_req_data(
235 req, struct cli_smb_state);
236 struct cli_state *cli = state->cli;
237 int num_pending = talloc_array_length(cli->pending);
240 if (num_pending == 1) {
242 * The pending read_smb tevent_req is a child of
243 * cli->pending. So if nothing is pending anymore, we need to
244 * delete the socket read fde.
246 TALLOC_FREE(cli->pending);
250 for (i=0; i<num_pending; i++) {
251 if (req == cli->pending[i]) {
255 if (i == num_pending) {
257 * Something's seriously broken. Just returning here is the
258 * right thing nevertheless, the point of this routine is to
259 * remove ourselves from cli->pending.
265 * Remove ourselves from the cli->pending array
267 if (num_pending > 1) {
268 cli->pending[i] = cli->pending[num_pending-1];
272 * No NULL check here, we're shrinking by sizeof(void *), and
273 * talloc_realloc just adjusts the size for this.
275 cli->pending = talloc_realloc(NULL, cli->pending, struct tevent_req *,
280 static int cli_smb_req_destructor(struct tevent_req *req)
282 cli_smb_req_unset_pending(req);
286 static void cli_smb_received(struct tevent_req *subreq);
288 bool cli_smb_req_set_pending(struct tevent_req *req)
290 struct cli_smb_state *state = tevent_req_data(
291 req, struct cli_smb_state);
292 struct cli_state *cli;
293 struct tevent_req **pending;
295 struct tevent_req *subreq;
298 num_pending = talloc_array_length(cli->pending);
300 pending = talloc_realloc(cli, cli->pending, struct tevent_req *,
302 if (pending == NULL) {
305 pending[num_pending] = req;
306 cli->pending = pending;
307 talloc_set_destructor(req, cli_smb_req_destructor);
309 if (num_pending > 0) {
314 * We're the first ones, add the read_smb request that waits for the
315 * answer from the server
317 subreq = read_smb_send(cli->pending, state->ev, cli->fd);
318 if (subreq == NULL) {
319 cli_smb_req_unset_pending(req);
322 tevent_req_set_callback(subreq, cli_smb_received, cli);
327 * Fetch a smb request's mid. Only valid after the request has been sent by
328 * cli_smb_req_send().
330 uint16_t cli_smb_req_mid(struct tevent_req *req)
332 struct cli_smb_state *state = tevent_req_data(
333 req, struct cli_smb_state);
334 return SVAL(state->header, smb_mid);
337 void cli_smb_req_set_mid(struct tevent_req *req, uint16_t mid)
339 struct cli_smb_state *state = tevent_req_data(
340 req, struct cli_smb_state);
344 static size_t iov_len(const struct iovec *iov, int count)
348 for (i=0; i<count; i++) {
349 result += iov[i].iov_len;
354 static uint8_t *iov_concat(TALLOC_CTX *mem_ctx, const struct iovec *iov,
357 size_t len = iov_len(iov, count);
362 buf = talloc_array(mem_ctx, uint8_t, len);
367 for (i=0; i<count; i++) {
368 memcpy(buf+copied, iov[i].iov_base, iov[i].iov_len);
369 copied += iov[i].iov_len;
374 struct tevent_req *cli_smb_req_create(TALLOC_CTX *mem_ctx,
375 struct event_context *ev,
376 struct cli_state *cli,
378 uint8_t additional_flags,
379 uint8_t wct, uint16_t *vwv,
381 struct iovec *bytes_iov)
383 struct tevent_req *result;
384 struct cli_smb_state *state;
386 if (iov_count > MAX_SMB_IOV) {
388 * Should not happen :-)
393 result = tevent_req_create(mem_ctx, &state, struct cli_smb_state);
394 if (result == NULL) {
399 state->mid = 0; /* Set to auto-choose in cli_smb_req_send */
400 state->chain_num = 0;
401 state->chained_requests = NULL;
403 cli_setup_packet_buf(cli, (char *)state->header);
404 SCVAL(state->header, smb_com, smb_command);
405 SSVAL(state->header, smb_tid, cli->cnum);
406 SCVAL(state->header, smb_wct, wct);
410 SSVAL(state->bytecount_buf, 0, iov_len(bytes_iov, iov_count));
412 state->iov[0].iov_base = (void *)state->header;
413 state->iov[0].iov_len = sizeof(state->header);
414 state->iov[1].iov_base = (void *)state->vwv;
415 state->iov[1].iov_len = wct * sizeof(uint16_t);
416 state->iov[2].iov_base = (void *)state->bytecount_buf;
417 state->iov[2].iov_len = sizeof(uint16_t);
419 if (iov_count != 0) {
420 memcpy(&state->iov[3], bytes_iov,
421 iov_count * sizeof(*bytes_iov));
423 state->iov_count = iov_count + 3;
428 static NTSTATUS cli_signv(struct cli_state *cli, struct iovec *iov, int count,
434 * Obvious optimization: Make cli_calculate_sign_mac work with struct
435 * iovec directly. MD5Update would do that just fine.
438 if ((count <= 0) || (iov[0].iov_len < smb_wct)) {
439 return NT_STATUS_INVALID_PARAMETER;
442 buf = iov_concat(talloc_tos(), iov, count);
444 return NT_STATUS_NO_MEMORY;
447 cli_calculate_sign_mac(cli, (char *)buf, seqnum);
448 memcpy(iov[0].iov_base, buf, iov[0].iov_len);
454 static void cli_smb_sent(struct tevent_req *subreq);
456 static NTSTATUS cli_smb_req_iov_send(struct tevent_req *req,
457 struct cli_smb_state *state,
458 struct iovec *iov, int iov_count)
460 struct tevent_req *subreq;
463 if (state->cli->fd == -1) {
464 return NT_STATUS_CONNECTION_INVALID;
467 if (iov[0].iov_len < smb_wct) {
468 return NT_STATUS_INVALID_PARAMETER;
471 if (state->mid != 0) {
472 SSVAL(iov[0].iov_base, smb_mid, state->mid);
474 SSVAL(iov[0].iov_base, smb_mid, cli_alloc_mid(state->cli));
477 smb_setlen((char *)iov[0].iov_base, iov_len(iov, iov_count) - 4);
479 status = cli_signv(state->cli, iov, iov_count, &state->seqnum);
481 if (!NT_STATUS_IS_OK(status)) {
485 if (cli_encryption_on(state->cli)) {
488 buf = (char *)iov_concat(talloc_tos(), iov, iov_count);
490 return NT_STATUS_NO_MEMORY;
492 status = cli_encrypt_message(state->cli, (char *)buf,
495 if (!NT_STATUS_IS_OK(status)) {
496 DEBUG(0, ("Error in encrypting client message: %s\n",
500 buf = (char *)talloc_memdup(state, enc_buf,
504 return NT_STATUS_NO_MEMORY;
506 iov[0].iov_base = (void *)buf;
507 iov[0].iov_len = talloc_get_size(buf);
510 subreq = writev_send(state, state->ev, state->cli->outgoing,
511 state->cli->fd, false, iov, iov_count);
512 if (subreq == NULL) {
513 return NT_STATUS_NO_MEMORY;
515 tevent_req_set_callback(subreq, cli_smb_sent, req);
519 NTSTATUS cli_smb_req_send(struct tevent_req *req)
521 struct cli_smb_state *state = tevent_req_data(
522 req, struct cli_smb_state);
524 return cli_smb_req_iov_send(req, state, state->iov, state->iov_count);
527 struct tevent_req *cli_smb_send(TALLOC_CTX *mem_ctx,
528 struct event_context *ev,
529 struct cli_state *cli,
531 uint8_t additional_flags,
532 uint8_t wct, uint16_t *vwv,
534 const uint8_t *bytes)
536 struct tevent_req *req;
540 iov.iov_base = CONST_DISCARD(void *, bytes);
541 iov.iov_len = num_bytes;
543 req = cli_smb_req_create(mem_ctx, ev, cli, smb_command,
544 additional_flags, wct, vwv, 1, &iov);
549 status = cli_smb_req_send(req);
550 if (!NT_STATUS_IS_OK(status)) {
551 tevent_req_nterror(req, status);
552 return tevent_req_post(req, ev);
557 static void cli_smb_sent(struct tevent_req *subreq)
559 struct tevent_req *req = tevent_req_callback_data(
560 subreq, struct tevent_req);
561 struct cli_smb_state *state = tevent_req_data(
562 req, struct cli_smb_state);
566 nwritten = writev_recv(subreq, &err);
568 if (nwritten == -1) {
569 if (state->cli->fd != -1) {
570 close(state->cli->fd);
573 tevent_req_nterror(req, map_nt_error_from_unix(err));
577 switch (CVAL(state->header, smb_com)) {
583 tevent_req_done(req);
586 if ((CVAL(state->header, smb_wct) == 8) &&
587 (CVAL(state->vwv+3, 0) == LOCKING_ANDX_OPLOCK_RELEASE)) {
589 tevent_req_done(req);
594 if (!cli_smb_req_set_pending(req)) {
595 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
600 static void cli_smb_received(struct tevent_req *subreq)
602 struct cli_state *cli = tevent_req_callback_data(
603 subreq, struct cli_state);
604 struct tevent_req *req;
605 struct cli_smb_state *state;
606 struct tevent_context *ev;
615 received = read_smb_recv(subreq, talloc_tos(), &inbuf, &err);
617 if (received == -1) {
622 status = map_nt_error_from_unix(err);
626 if ((IVAL(inbuf, 4) != 0x424d53ff) /* 0xFF"SMB" */
627 && (SVAL(inbuf, 4) != 0x45ff)) /* 0xFF"E" */ {
628 DEBUG(10, ("Got non-SMB PDU\n"));
629 status = NT_STATUS_INVALID_NETWORK_RESPONSE;
633 if (cli_encryption_on(cli) && (CVAL(inbuf, 0) == 0)) {
634 uint16_t enc_ctx_num;
636 status = get_enc_ctx_num(inbuf, &enc_ctx_num);
637 if (!NT_STATUS_IS_OK(status)) {
638 DEBUG(10, ("get_enc_ctx_num returned %s\n",
643 if (enc_ctx_num != cli->trans_enc_state->enc_ctx_num) {
644 DEBUG(10, ("wrong enc_ctx %d, expected %d\n",
646 cli->trans_enc_state->enc_ctx_num));
647 status = NT_STATUS_INVALID_HANDLE;
651 status = common_decrypt_buffer(cli->trans_enc_state,
653 if (!NT_STATUS_IS_OK(status)) {
654 DEBUG(10, ("common_decrypt_buffer returned %s\n",
660 mid = SVAL(inbuf, smb_mid);
661 num_pending = talloc_array_length(cli->pending);
663 for (i=0; i<num_pending; i++) {
664 if (mid == cli_smb_req_mid(cli->pending[i])) {
668 if (i == num_pending) {
669 /* Dump unexpected reply */
674 oplock_break = false;
678 * Paranoia checks that this is really an oplock break request.
680 oplock_break = (smb_len(inbuf) == 51); /* hdr + 8 words */
681 oplock_break &= ((CVAL(inbuf, smb_flg) & FLAG_REPLY) == 0);
682 oplock_break &= (CVAL(inbuf, smb_com) == SMBlockingX);
683 oplock_break &= (SVAL(inbuf, smb_vwv6) == 0);
684 oplock_break &= (SVAL(inbuf, smb_vwv7) == 0);
687 /* Dump unexpected reply */
693 req = cli->pending[i];
694 state = tevent_req_data(req, struct cli_smb_state);
697 if (!oplock_break /* oplock breaks are not signed */
698 && !cli_check_sign_mac(cli, (char *)inbuf, state->seqnum+1)) {
699 DEBUG(10, ("cli_check_sign_mac failed\n"));
701 status = NT_STATUS_ACCESS_DENIED;
705 if (state->chained_requests == NULL) {
706 state->inbuf = talloc_move(state, &inbuf);
707 talloc_set_destructor(req, NULL);
708 cli_smb_req_destructor(req);
709 tevent_req_done(req);
711 struct tevent_req **chain = talloc_move(
712 talloc_tos(), &state->chained_requests);
713 int num_chained = talloc_array_length(chain);
715 for (i=0; i<num_chained; i++) {
716 state = tevent_req_data(chain[i], struct
718 state->inbuf = inbuf;
719 state->chain_num = i;
720 tevent_req_done(chain[i]);
726 if (talloc_array_length(cli->pending) > 0) {
728 * Set up another read request for the other pending cli_smb
731 state = tevent_req_data(cli->pending[0], struct cli_smb_state);
732 subreq = read_smb_send(cli->pending, state->ev, cli->fd);
733 if (subreq == NULL) {
734 status = NT_STATUS_NO_MEMORY;
737 tevent_req_set_callback(subreq, cli_smb_received, cli);
742 * Cancel all pending requests. We don't do a for-loop walking
743 * cli->pending because that array changes in
744 * cli_smb_req_destructor().
746 while (talloc_array_length(cli->pending) > 0) {
747 req = cli->pending[0];
748 talloc_set_destructor(req, NULL);
749 cli_smb_req_destructor(req);
750 tevent_req_nterror(req, status);
754 NTSTATUS cli_smb_recv(struct tevent_req *req, uint8_t min_wct,
755 uint8_t *pwct, uint16_t **pvwv,
756 uint32_t *pnum_bytes, uint8_t **pbytes)
758 struct cli_smb_state *state = tevent_req_data(
759 req, struct cli_smb_state);
760 NTSTATUS status = NT_STATUS_OK;
763 size_t wct_ofs, bytes_offset;
766 if (tevent_req_is_nterror(req, &status)) {
770 if (state->inbuf == NULL) {
771 /* This was a request without a reply */
776 cmd = CVAL(state->inbuf, smb_com);
778 for (i=0; i<state->chain_num; i++) {
779 if (i < state->chain_num-1) {
781 return NT_STATUS_REQUEST_ABORTED;
783 if (!is_andx_req(cmd)) {
784 return NT_STATUS_INVALID_NETWORK_RESPONSE;
788 if (!have_andx_command((char *)state->inbuf, wct_ofs)) {
790 * This request was not completed because a previous
791 * request in the chain had received an error.
793 return NT_STATUS_REQUEST_ABORTED;
796 wct_ofs = SVAL(state->inbuf, wct_ofs + 3);
799 * Skip the all-present length field. No overflow, we've just
800 * put a 16-bit value into a size_t.
804 if (wct_ofs+2 > talloc_get_size(state->inbuf)) {
805 return NT_STATUS_INVALID_NETWORK_RESPONSE;
808 cmd = CVAL(state->inbuf, wct_ofs + 1);
811 status = cli_pull_error((char *)state->inbuf);
813 if (!have_andx_command((char *)state->inbuf, wct_ofs)
814 && NT_STATUS_IS_ERR(status)) {
816 * The last command takes the error code. All further commands
817 * down the requested chain will get a
818 * NT_STATUS_REQUEST_ABORTED.
823 wct = CVAL(state->inbuf, wct_ofs);
824 bytes_offset = wct_ofs + 1 + wct * sizeof(uint16_t);
825 num_bytes = SVAL(state->inbuf, bytes_offset);
828 return NT_STATUS_INVALID_NETWORK_RESPONSE;
832 * wct_ofs is a 16-bit value plus 4, wct is a 8-bit value, num_bytes
833 * is a 16-bit value. So bytes_offset being size_t should be far from
836 if ((bytes_offset + 2 > talloc_get_size(state->inbuf))
837 || (bytes_offset > 0xffff)) {
838 return NT_STATUS_INVALID_NETWORK_RESPONSE;
845 *pvwv = (uint16_t *)(state->inbuf + wct_ofs + 1);
847 if (pnum_bytes != NULL) {
848 *pnum_bytes = num_bytes;
850 if (pbytes != NULL) {
851 *pbytes = (uint8_t *)state->inbuf + bytes_offset + 2;
857 size_t cli_smb_wct_ofs(struct tevent_req **reqs, int num_reqs)
862 wct_ofs = smb_wct - 4;
864 for (i=0; i<num_reqs; i++) {
865 struct cli_smb_state *state;
866 state = tevent_req_data(reqs[i], struct cli_smb_state);
867 wct_ofs += iov_len(state->iov+1, state->iov_count-1);
868 wct_ofs = (wct_ofs + 3) & ~3;
873 NTSTATUS cli_smb_chain_send(struct tevent_req **reqs, int num_reqs)
875 struct cli_smb_state *first_state = tevent_req_data(
876 reqs[0], struct cli_smb_state);
877 struct cli_smb_state *last_state = tevent_req_data(
878 reqs[num_reqs-1], struct cli_smb_state);
879 struct cli_smb_state *state;
881 size_t chain_padding = 0;
883 struct iovec *iov = NULL;
884 struct iovec *this_iov;
888 for (i=0; i<num_reqs; i++) {
889 state = tevent_req_data(reqs[i], struct cli_smb_state);
890 iovlen += state->iov_count;
893 iov = talloc_array(last_state, struct iovec, iovlen);
895 return NT_STATUS_NO_MEMORY;
898 first_state->chained_requests = (struct tevent_req **)talloc_memdup(
899 last_state, reqs, sizeof(*reqs) * num_reqs);
900 if (first_state->chained_requests == NULL) {
902 return NT_STATUS_NO_MEMORY;
905 wct_offset = smb_wct - 4;
908 for (i=0; i<num_reqs; i++) {
909 size_t next_padding = 0;
912 state = tevent_req_data(reqs[i], struct cli_smb_state);
914 if (i < num_reqs-1) {
915 if (!is_andx_req(CVAL(state->header, smb_com))
916 || CVAL(state->header, smb_wct) < 2) {
918 TALLOC_FREE(first_state->chained_requests);
919 return NT_STATUS_INVALID_PARAMETER;
923 wct_offset += iov_len(state->iov+1, state->iov_count-1) + 1;
924 if ((wct_offset % 4) != 0) {
925 next_padding = 4 - (wct_offset % 4);
927 wct_offset += next_padding;
930 if (i < num_reqs-1) {
931 struct cli_smb_state *next_state = tevent_req_data(
932 reqs[i+1], struct cli_smb_state);
933 SCVAL(vwv+0, 0, CVAL(next_state->header, smb_com));
935 SSVAL(vwv+1, 0, wct_offset);
936 } else if (is_andx_req(CVAL(state->header, smb_com))) {
937 /* properly end the chain */
938 SCVAL(vwv+0, 0, 0xff);
939 SCVAL(vwv+0, 1, 0xff);
944 this_iov[0] = state->iov[0];
947 * This one is a bit subtle. We have to add
948 * chain_padding bytes between the requests, and we
949 * have to also include the wct field of the
950 * subsequent requests. We use the subsequent header
951 * for the padding, it contains the wct field in its
954 this_iov[0].iov_len = chain_padding+1;
955 this_iov[0].iov_base = (void *)&state->header[
956 sizeof(state->header) - this_iov[0].iov_len];
957 memset(this_iov[0].iov_base, 0, this_iov[0].iov_len-1);
959 memcpy(this_iov+1, state->iov+1,
960 sizeof(struct iovec) * (state->iov_count-1));
961 this_iov += state->iov_count;
962 chain_padding = next_padding;
965 status = cli_smb_req_iov_send(reqs[0], last_state, iov, iovlen);
966 if (!NT_STATUS_IS_OK(status)) {
968 TALLOC_FREE(first_state->chained_requests);
975 uint8_t *cli_smb_inbuf(struct tevent_req *req)
977 struct cli_smb_state *state = tevent_req_data(
978 req, struct cli_smb_state);
982 bool cli_has_async_calls(struct cli_state *cli)
984 return ((tevent_queue_length(cli->outgoing) != 0)
985 || (talloc_array_length(cli->pending) != 0));
988 struct cli_smb_oplock_break_waiter_state {
993 static void cli_smb_oplock_break_waiter_done(struct tevent_req *subreq);
995 struct tevent_req *cli_smb_oplock_break_waiter_send(TALLOC_CTX *mem_ctx,
996 struct event_context *ev,
997 struct cli_state *cli)
999 struct tevent_req *req, *subreq;
1000 struct cli_smb_oplock_break_waiter_state *state;
1001 struct cli_smb_state *smb_state;
1003 req = tevent_req_create(mem_ctx, &state,
1004 struct cli_smb_oplock_break_waiter_state);
1010 * Create a fake SMB request that we will never send out. This is only
1011 * used to be set into the pending queue with the right mid.
1013 subreq = cli_smb_req_create(mem_ctx, ev, cli, 0, 0, 0, NULL, 0, NULL);
1014 if (tevent_req_nomem(subreq, req)) {
1015 return tevent_req_post(req, ev);
1017 smb_state = tevent_req_data(subreq, struct cli_smb_state);
1018 SSVAL(smb_state->header, smb_mid, 0xffff);
1020 if (!cli_smb_req_set_pending(subreq)) {
1021 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
1022 return tevent_req_post(req, ev);
1024 tevent_req_set_callback(subreq, cli_smb_oplock_break_waiter_done, req);
1028 static void cli_smb_oplock_break_waiter_done(struct tevent_req *subreq)
1030 struct tevent_req *req = tevent_req_callback_data(
1031 subreq, struct tevent_req);
1032 struct cli_smb_oplock_break_waiter_state *state = tevent_req_data(
1033 req, struct cli_smb_oplock_break_waiter_state);
1040 status = cli_smb_recv(subreq, 8, &wct, &vwv, &num_bytes, &bytes);
1041 if (!NT_STATUS_IS_OK(status)) {
1042 TALLOC_FREE(subreq);
1043 tevent_req_nterror(req, status);
1046 state->fnum = SVAL(vwv+2, 0);
1047 state->level = CVAL(vwv+3, 1);
1048 tevent_req_done(req);
1051 NTSTATUS cli_smb_oplock_break_waiter_recv(struct tevent_req *req,
1055 struct cli_smb_oplock_break_waiter_state *state = tevent_req_data(
1056 req, struct cli_smb_oplock_break_waiter_state);
1059 if (tevent_req_is_nterror(req, &status)) {
1062 *pfnum = state->fnum;
1063 *plevel = state->level;
1064 return NT_STATUS_OK;