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];
205 struct tevent_req **chained_requests;
208 static uint16_t cli_alloc_mid(struct cli_state *cli)
210 int num_pending = talloc_array_length(cli->pending);
217 if ((result == 0) || (result == 0xffff)) {
221 for (i=0; i<num_pending; i++) {
222 if (result == cli_smb_req_mid(cli->pending[i])) {
227 if (i == num_pending) {
233 void cli_smb_req_unset_pending(struct tevent_req *req)
235 struct cli_smb_state *state = tevent_req_data(
236 req, struct cli_smb_state);
237 struct cli_state *cli = state->cli;
238 int num_pending = talloc_array_length(cli->pending);
241 if (num_pending == 1) {
243 * The pending read_smb tevent_req is a child of
244 * cli->pending. So if nothing is pending anymore, we need to
245 * delete the socket read fde.
247 TALLOC_FREE(cli->pending);
251 for (i=0; i<num_pending; i++) {
252 if (req == cli->pending[i]) {
256 if (i == num_pending) {
258 * Something's seriously broken. Just returning here is the
259 * right thing nevertheless, the point of this routine is to
260 * remove ourselves from cli->pending.
266 * Remove ourselves from the cli->pending array
268 if (num_pending > 1) {
269 cli->pending[i] = cli->pending[num_pending-1];
273 * No NULL check here, we're shrinking by sizeof(void *), and
274 * talloc_realloc just adjusts the size for this.
276 cli->pending = talloc_realloc(NULL, cli->pending, struct tevent_req *,
281 static int cli_smb_req_destructor(struct tevent_req *req)
283 cli_smb_req_unset_pending(req);
287 static void cli_smb_received(struct tevent_req *subreq);
289 bool cli_smb_req_set_pending(struct tevent_req *req)
291 struct cli_smb_state *state = tevent_req_data(
292 req, struct cli_smb_state);
293 struct cli_state *cli;
294 struct tevent_req **pending;
296 struct tevent_req *subreq;
299 num_pending = talloc_array_length(cli->pending);
301 pending = talloc_realloc(cli, cli->pending, struct tevent_req *,
303 if (pending == NULL) {
306 pending[num_pending] = req;
307 cli->pending = pending;
308 talloc_set_destructor(req, cli_smb_req_destructor);
310 if (num_pending > 0) {
315 * We're the first ones, add the read_smb request that waits for the
316 * answer from the server
318 subreq = read_smb_send(cli->pending, state->ev, cli->fd);
319 if (subreq == NULL) {
320 cli_smb_req_unset_pending(req);
323 tevent_req_set_callback(subreq, cli_smb_received, cli);
328 * Fetch a smb request's mid. Only valid after the request has been sent by
329 * cli_smb_req_send().
331 uint16_t cli_smb_req_mid(struct tevent_req *req)
333 struct cli_smb_state *state = tevent_req_data(
334 req, struct cli_smb_state);
335 return SVAL(state->header, smb_mid);
338 void cli_smb_req_set_mid(struct tevent_req *req, uint16_t mid)
340 struct cli_smb_state *state = tevent_req_data(
341 req, struct cli_smb_state);
345 static size_t iov_len(const struct iovec *iov, int count)
349 for (i=0; i<count; i++) {
350 result += iov[i].iov_len;
355 static uint8_t *iov_concat(TALLOC_CTX *mem_ctx, const struct iovec *iov,
358 size_t len = iov_len(iov, count);
363 buf = talloc_array(mem_ctx, uint8_t, len);
368 for (i=0; i<count; i++) {
369 memcpy(buf+copied, iov[i].iov_base, iov[i].iov_len);
370 copied += iov[i].iov_len;
375 struct tevent_req *cli_smb_req_create(TALLOC_CTX *mem_ctx,
376 struct event_context *ev,
377 struct cli_state *cli,
379 uint8_t additional_flags,
380 uint8_t wct, uint16_t *vwv,
382 struct iovec *bytes_iov)
384 struct tevent_req *result;
385 struct cli_smb_state *state;
386 struct timeval endtime;
388 if (iov_count > MAX_SMB_IOV) {
390 * Should not happen :-)
395 result = tevent_req_create(mem_ctx, &state, struct cli_smb_state);
396 if (result == NULL) {
401 state->mid = 0; /* Set to auto-choose in cli_smb_req_send */
402 state->chain_num = 0;
403 state->chained_requests = NULL;
405 cli_setup_packet_buf(cli, (char *)state->header);
406 SCVAL(state->header, smb_com, smb_command);
407 SSVAL(state->header, smb_tid, cli->cnum);
408 SCVAL(state->header, smb_wct, wct);
412 SSVAL(state->bytecount_buf, 0, iov_len(bytes_iov, iov_count));
414 state->iov[0].iov_base = (void *)state->header;
415 state->iov[0].iov_len = sizeof(state->header);
416 state->iov[1].iov_base = (void *)state->vwv;
417 state->iov[1].iov_len = wct * sizeof(uint16_t);
418 state->iov[2].iov_base = (void *)state->bytecount_buf;
419 state->iov[2].iov_len = sizeof(uint16_t);
421 if (iov_count != 0) {
422 memcpy(&state->iov[3], bytes_iov,
423 iov_count * sizeof(*bytes_iov));
425 state->iov_count = iov_count + 3;
428 endtime = timeval_current_ofs(0, cli->timeout * 1000);
429 if (!tevent_req_set_endtime(result, ev, endtime)) {
430 tevent_req_nomem(NULL, result);
436 static NTSTATUS cli_signv(struct cli_state *cli, struct iovec *iov, int count,
442 * Obvious optimization: Make cli_calculate_sign_mac work with struct
443 * iovec directly. MD5Update would do that just fine.
446 if ((count <= 0) || (iov[0].iov_len < smb_wct)) {
447 return NT_STATUS_INVALID_PARAMETER;
450 buf = iov_concat(talloc_tos(), iov, count);
452 return NT_STATUS_NO_MEMORY;
455 cli_calculate_sign_mac(cli, (char *)buf, seqnum);
456 memcpy(iov[0].iov_base, buf, iov[0].iov_len);
462 static void cli_smb_sent(struct tevent_req *subreq);
464 static NTSTATUS cli_smb_req_iov_send(struct tevent_req *req,
465 struct cli_smb_state *state,
466 struct iovec *iov, int iov_count)
468 struct tevent_req *subreq;
471 if (state->cli->fd == -1) {
472 return NT_STATUS_CONNECTION_INVALID;
475 if (iov[0].iov_len < smb_wct) {
476 return NT_STATUS_INVALID_PARAMETER;
479 if (state->mid != 0) {
480 SSVAL(iov[0].iov_base, smb_mid, state->mid);
482 uint16_t mid = cli_alloc_mid(state->cli);
483 SSVAL(iov[0].iov_base, smb_mid, mid);
486 smb_setlen((char *)iov[0].iov_base, iov_len(iov, iov_count) - 4);
488 status = cli_signv(state->cli, iov, iov_count, &state->seqnum);
490 if (!NT_STATUS_IS_OK(status)) {
494 if (cli_encryption_on(state->cli)) {
497 buf = (char *)iov_concat(talloc_tos(), iov, iov_count);
499 return NT_STATUS_NO_MEMORY;
501 status = cli_encrypt_message(state->cli, (char *)buf,
504 if (!NT_STATUS_IS_OK(status)) {
505 DEBUG(0, ("Error in encrypting client message: %s\n",
509 buf = (char *)talloc_memdup(state, enc_buf,
513 return NT_STATUS_NO_MEMORY;
515 iov[0].iov_base = (void *)buf;
516 iov[0].iov_len = talloc_get_size(buf);
519 subreq = writev_send(state, state->ev, state->cli->outgoing,
520 state->cli->fd, false, iov, iov_count);
521 if (subreq == NULL) {
522 return NT_STATUS_NO_MEMORY;
524 tevent_req_set_callback(subreq, cli_smb_sent, req);
528 NTSTATUS cli_smb_req_send(struct tevent_req *req)
530 struct cli_smb_state *state = tevent_req_data(
531 req, struct cli_smb_state);
533 return cli_smb_req_iov_send(req, state, state->iov, state->iov_count);
536 struct tevent_req *cli_smb_send(TALLOC_CTX *mem_ctx,
537 struct event_context *ev,
538 struct cli_state *cli,
540 uint8_t additional_flags,
541 uint8_t wct, uint16_t *vwv,
543 const uint8_t *bytes)
545 struct tevent_req *req;
549 iov.iov_base = CONST_DISCARD(void *, bytes);
550 iov.iov_len = num_bytes;
552 req = cli_smb_req_create(mem_ctx, ev, cli, smb_command,
553 additional_flags, wct, vwv, 1, &iov);
558 status = cli_smb_req_send(req);
559 if (!NT_STATUS_IS_OK(status)) {
560 tevent_req_nterror(req, status);
561 return tevent_req_post(req, ev);
566 static void cli_smb_sent(struct tevent_req *subreq)
568 struct tevent_req *req = tevent_req_callback_data(
569 subreq, struct tevent_req);
570 struct cli_smb_state *state = tevent_req_data(
571 req, struct cli_smb_state);
575 nwritten = writev_recv(subreq, &err);
577 if (nwritten == -1) {
578 if (state->cli->fd != -1) {
579 close(state->cli->fd);
582 tevent_req_nterror(req, map_nt_error_from_unix(err));
586 switch (CVAL(state->header, smb_com)) {
592 tevent_req_done(req);
595 if ((CVAL(state->header, smb_wct) == 8) &&
596 (CVAL(state->vwv+3, 0) == LOCKING_ANDX_OPLOCK_RELEASE)) {
598 tevent_req_done(req);
603 if (!cli_smb_req_set_pending(req)) {
604 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
609 static void cli_smb_received(struct tevent_req *subreq)
611 struct cli_state *cli = tevent_req_callback_data(
612 subreq, struct cli_state);
613 struct tevent_req *req;
614 struct cli_smb_state *state;
623 received = read_smb_recv(subreq, talloc_tos(), &inbuf, &err);
625 if (received == -1) {
630 status = map_nt_error_from_unix(err);
634 if ((IVAL(inbuf, 4) != 0x424d53ff) /* 0xFF"SMB" */
635 && (SVAL(inbuf, 4) != 0x45ff)) /* 0xFF"E" */ {
636 DEBUG(10, ("Got non-SMB PDU\n"));
637 status = NT_STATUS_INVALID_NETWORK_RESPONSE;
641 if (cli_encryption_on(cli) && (CVAL(inbuf, 0) == 0)) {
642 uint16_t enc_ctx_num;
644 status = get_enc_ctx_num(inbuf, &enc_ctx_num);
645 if (!NT_STATUS_IS_OK(status)) {
646 DEBUG(10, ("get_enc_ctx_num returned %s\n",
651 if (enc_ctx_num != cli->trans_enc_state->enc_ctx_num) {
652 DEBUG(10, ("wrong enc_ctx %d, expected %d\n",
654 cli->trans_enc_state->enc_ctx_num));
655 status = NT_STATUS_INVALID_HANDLE;
659 status = common_decrypt_buffer(cli->trans_enc_state,
661 if (!NT_STATUS_IS_OK(status)) {
662 DEBUG(10, ("common_decrypt_buffer returned %s\n",
668 mid = SVAL(inbuf, smb_mid);
669 num_pending = talloc_array_length(cli->pending);
671 for (i=0; i<num_pending; i++) {
672 if (mid == cli_smb_req_mid(cli->pending[i])) {
676 if (i == num_pending) {
677 /* Dump unexpected reply */
682 oplock_break = false;
686 * Paranoia checks that this is really an oplock break request.
688 oplock_break = (smb_len(inbuf) == 51); /* hdr + 8 words */
689 oplock_break &= ((CVAL(inbuf, smb_flg) & FLAG_REPLY) == 0);
690 oplock_break &= (CVAL(inbuf, smb_com) == SMBlockingX);
691 oplock_break &= (SVAL(inbuf, smb_vwv6) == 0);
692 oplock_break &= (SVAL(inbuf, smb_vwv7) == 0);
695 /* Dump unexpected reply */
701 req = cli->pending[i];
702 state = tevent_req_data(req, struct cli_smb_state);
704 if (!oplock_break /* oplock breaks are not signed */
705 && !cli_check_sign_mac(cli, (char *)inbuf, state->seqnum+1)) {
706 DEBUG(10, ("cli_check_sign_mac failed\n"));
708 status = NT_STATUS_ACCESS_DENIED;
712 if (state->chained_requests == NULL) {
713 state->inbuf = talloc_move(state, &inbuf);
714 talloc_set_destructor(req, NULL);
715 cli_smb_req_destructor(req);
716 state->chain_num = 0;
717 state->chain_length = 1;
718 tevent_req_done(req);
720 struct tevent_req **chain = talloc_move(
721 talloc_tos(), &state->chained_requests);
722 int num_chained = talloc_array_length(chain);
724 for (i=0; i<num_chained; i++) {
725 state = tevent_req_data(chain[i], struct
727 state->inbuf = inbuf;
728 state->chain_num = i;
729 state->chain_length = num_chained;
730 tevent_req_done(chain[i]);
736 if (talloc_array_length(cli->pending) > 0) {
738 * Set up another read request for the other pending cli_smb
741 state = tevent_req_data(cli->pending[0], struct cli_smb_state);
742 subreq = read_smb_send(cli->pending, state->ev, cli->fd);
743 if (subreq == NULL) {
744 status = NT_STATUS_NO_MEMORY;
747 tevent_req_set_callback(subreq, cli_smb_received, cli);
752 * Cancel all pending requests. We don't do a for-loop walking
753 * cli->pending because that array changes in
754 * cli_smb_req_destructor().
756 while (talloc_array_length(cli->pending) > 0) {
757 req = cli->pending[0];
758 talloc_set_destructor(req, NULL);
759 cli_smb_req_destructor(req);
760 tevent_req_nterror(req, status);
764 NTSTATUS cli_smb_recv(struct tevent_req *req,
765 TALLOC_CTX *mem_ctx, uint8_t **pinbuf,
766 uint8_t min_wct, uint8_t *pwct, uint16_t **pvwv,
767 uint32_t *pnum_bytes, uint8_t **pbytes)
769 struct cli_smb_state *state = tevent_req_data(
770 req, struct cli_smb_state);
771 NTSTATUS status = NT_STATUS_OK;
774 size_t wct_ofs, bytes_offset;
777 if (tevent_req_is_nterror(req, &status)) {
781 if (state->inbuf == NULL) {
782 /* This was a request without a reply */
787 cmd = CVAL(state->inbuf, smb_com);
789 for (i=0; i<state->chain_num; i++) {
790 if (i < state->chain_num-1) {
792 return NT_STATUS_REQUEST_ABORTED;
794 if (!is_andx_req(cmd)) {
795 return NT_STATUS_INVALID_NETWORK_RESPONSE;
799 if (!have_andx_command((char *)state->inbuf, wct_ofs)) {
801 * This request was not completed because a previous
802 * request in the chain had received an error.
804 return NT_STATUS_REQUEST_ABORTED;
807 wct_ofs = SVAL(state->inbuf, wct_ofs + 3);
810 * Skip the all-present length field. No overflow, we've just
811 * put a 16-bit value into a size_t.
815 if (wct_ofs+2 > talloc_get_size(state->inbuf)) {
816 return NT_STATUS_INVALID_NETWORK_RESPONSE;
819 cmd = CVAL(state->inbuf, wct_ofs + 1);
822 status = cli_pull_error((char *)state->inbuf);
824 if (!have_andx_command((char *)state->inbuf, wct_ofs)) {
826 if ((cmd == SMBsesssetupX)
828 status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
830 * NT_STATUS_MORE_PROCESSING_REQUIRED is a
831 * valid return code for session setup
836 if (NT_STATUS_IS_ERR(status)) {
838 * The last command takes the error code. All
839 * further commands down the requested chain
840 * will get a NT_STATUS_REQUEST_ABORTED.
848 wct = CVAL(state->inbuf, wct_ofs);
849 bytes_offset = wct_ofs + 1 + wct * sizeof(uint16_t);
850 num_bytes = SVAL(state->inbuf, bytes_offset);
853 return NT_STATUS_INVALID_NETWORK_RESPONSE;
857 * wct_ofs is a 16-bit value plus 4, wct is a 8-bit value, num_bytes
858 * is a 16-bit value. So bytes_offset being size_t should be far from
861 if ((bytes_offset + 2 > talloc_get_size(state->inbuf))
862 || (bytes_offset > 0xffff)) {
863 return NT_STATUS_INVALID_NETWORK_RESPONSE;
870 *pvwv = (uint16_t *)(state->inbuf + wct_ofs + 1);
872 if (pnum_bytes != NULL) {
873 *pnum_bytes = num_bytes;
875 if (pbytes != NULL) {
876 *pbytes = (uint8_t *)state->inbuf + bytes_offset + 2;
878 if ((mem_ctx != NULL) && (pinbuf != NULL)) {
879 if (state->chain_num == state->chain_length-1) {
880 *pinbuf = talloc_move(mem_ctx, &state->inbuf);
882 *pinbuf = state->inbuf;
889 size_t cli_smb_wct_ofs(struct tevent_req **reqs, int num_reqs)
894 wct_ofs = smb_wct - 4;
896 for (i=0; i<num_reqs; i++) {
897 struct cli_smb_state *state;
898 state = tevent_req_data(reqs[i], struct cli_smb_state);
899 wct_ofs += iov_len(state->iov+1, state->iov_count-1);
900 wct_ofs = (wct_ofs + 3) & ~3;
905 NTSTATUS cli_smb_chain_send(struct tevent_req **reqs, int num_reqs)
907 struct cli_smb_state *first_state = tevent_req_data(
908 reqs[0], struct cli_smb_state);
909 struct cli_smb_state *last_state = tevent_req_data(
910 reqs[num_reqs-1], struct cli_smb_state);
911 struct cli_smb_state *state;
913 size_t chain_padding = 0;
915 struct iovec *iov = NULL;
916 struct iovec *this_iov;
920 for (i=0; i<num_reqs; i++) {
921 state = tevent_req_data(reqs[i], struct cli_smb_state);
922 iovlen += state->iov_count;
925 iov = talloc_array(last_state, struct iovec, iovlen);
927 return NT_STATUS_NO_MEMORY;
930 first_state->chained_requests = (struct tevent_req **)talloc_memdup(
931 last_state, reqs, sizeof(*reqs) * num_reqs);
932 if (first_state->chained_requests == NULL) {
934 return NT_STATUS_NO_MEMORY;
937 wct_offset = smb_wct - 4;
940 for (i=0; i<num_reqs; i++) {
941 size_t next_padding = 0;
944 state = tevent_req_data(reqs[i], struct cli_smb_state);
946 if (i < num_reqs-1) {
947 if (!is_andx_req(CVAL(state->header, smb_com))
948 || CVAL(state->header, smb_wct) < 2) {
950 TALLOC_FREE(first_state->chained_requests);
951 return NT_STATUS_INVALID_PARAMETER;
955 wct_offset += iov_len(state->iov+1, state->iov_count-1) + 1;
956 if ((wct_offset % 4) != 0) {
957 next_padding = 4 - (wct_offset % 4);
959 wct_offset += next_padding;
962 if (i < num_reqs-1) {
963 struct cli_smb_state *next_state = tevent_req_data(
964 reqs[i+1], struct cli_smb_state);
965 SCVAL(vwv+0, 0, CVAL(next_state->header, smb_com));
967 SSVAL(vwv+1, 0, wct_offset);
968 } else if (is_andx_req(CVAL(state->header, smb_com))) {
969 /* properly end the chain */
970 SCVAL(vwv+0, 0, 0xff);
971 SCVAL(vwv+0, 1, 0xff);
976 this_iov[0] = state->iov[0];
979 * This one is a bit subtle. We have to add
980 * chain_padding bytes between the requests, and we
981 * have to also include the wct field of the
982 * subsequent requests. We use the subsequent header
983 * for the padding, it contains the wct field in its
986 this_iov[0].iov_len = chain_padding+1;
987 this_iov[0].iov_base = (void *)&state->header[
988 sizeof(state->header) - this_iov[0].iov_len];
989 memset(this_iov[0].iov_base, 0, this_iov[0].iov_len-1);
991 memcpy(this_iov+1, state->iov+1,
992 sizeof(struct iovec) * (state->iov_count-1));
993 this_iov += state->iov_count;
994 chain_padding = next_padding;
997 status = cli_smb_req_iov_send(reqs[0], last_state, iov, iovlen);
998 if (!NT_STATUS_IS_OK(status)) {
1000 TALLOC_FREE(first_state->chained_requests);
1004 return NT_STATUS_OK;
1007 uint8_t *cli_smb_inbuf(struct tevent_req *req)
1009 struct cli_smb_state *state = tevent_req_data(
1010 req, struct cli_smb_state);
1011 return state->inbuf;
1014 bool cli_has_async_calls(struct cli_state *cli)
1016 return ((tevent_queue_length(cli->outgoing) != 0)
1017 || (talloc_array_length(cli->pending) != 0));
1020 struct cli_smb_oplock_break_waiter_state {
1025 static void cli_smb_oplock_break_waiter_done(struct tevent_req *subreq);
1027 struct tevent_req *cli_smb_oplock_break_waiter_send(TALLOC_CTX *mem_ctx,
1028 struct event_context *ev,
1029 struct cli_state *cli)
1031 struct tevent_req *req, *subreq;
1032 struct cli_smb_oplock_break_waiter_state *state;
1033 struct cli_smb_state *smb_state;
1035 req = tevent_req_create(mem_ctx, &state,
1036 struct cli_smb_oplock_break_waiter_state);
1042 * Create a fake SMB request that we will never send out. This is only
1043 * used to be set into the pending queue with the right mid.
1045 subreq = cli_smb_req_create(mem_ctx, ev, cli, 0, 0, 0, NULL, 0, NULL);
1046 if (tevent_req_nomem(subreq, req)) {
1047 return tevent_req_post(req, ev);
1049 smb_state = tevent_req_data(subreq, struct cli_smb_state);
1050 SSVAL(smb_state->header, smb_mid, 0xffff);
1052 if (!cli_smb_req_set_pending(subreq)) {
1053 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
1054 return tevent_req_post(req, ev);
1056 tevent_req_set_callback(subreq, cli_smb_oplock_break_waiter_done, req);
1060 static void cli_smb_oplock_break_waiter_done(struct tevent_req *subreq)
1062 struct tevent_req *req = tevent_req_callback_data(
1063 subreq, struct tevent_req);
1064 struct cli_smb_oplock_break_waiter_state *state = tevent_req_data(
1065 req, struct cli_smb_oplock_break_waiter_state);
1073 status = cli_smb_recv(subreq, state, &inbuf, 8, &wct, &vwv,
1074 &num_bytes, &bytes);
1075 TALLOC_FREE(subreq);
1076 if (!NT_STATUS_IS_OK(status)) {
1077 tevent_req_nterror(req, status);
1080 state->fnum = SVAL(vwv+2, 0);
1081 state->level = CVAL(vwv+3, 1);
1082 tevent_req_done(req);
1085 NTSTATUS cli_smb_oplock_break_waiter_recv(struct tevent_req *req,
1089 struct cli_smb_oplock_break_waiter_state *state = tevent_req_data(
1090 req, struct cli_smb_oplock_break_waiter_state);
1093 if (tevent_req_is_nterror(req, &status)) {
1096 *pfnum = state->fnum;
1097 *plevel = state->level;
1098 return NT_STATUS_OK;