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 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->conn.pending);
142 cli->conn.read_smb_req = NULL;
146 for (i=0; i<num_pending; i++) {
147 if (req == cli->conn.pending[i]) {
151 if (i == num_pending) {
153 * Something's seriously broken. Just returning here is the
154 * right thing nevertheless, the point of this routine is to
155 * remove ourselves from cli->conn.pending.
161 * Remove ourselves from the cli->conn.pending array
163 cli->conn.pending[i] = cli->conn.pending[num_pending-1];
166 * No NULL check here, we're shrinking by sizeof(void *), and
167 * talloc_realloc just adjusts the size for this.
169 cli->conn.pending = talloc_realloc(NULL, cli->conn.pending,
175 static int cli_smb_req_destructor(struct tevent_req *req)
177 struct cli_smb_state *state = tevent_req_data(
178 req, struct cli_smb_state);
180 * Make sure we really remove it from
181 * the pending array on destruction.
184 cli_smb_req_unset_pending(req);
188 static void cli_smb_received(struct tevent_req *subreq);
190 bool cli_smb_req_set_pending(struct tevent_req *req)
192 struct cli_smb_state *state = tevent_req_data(
193 req, struct cli_smb_state);
194 struct cli_state *cli;
195 struct tevent_req **pending;
199 num_pending = talloc_array_length(cli->conn.pending);
201 pending = talloc_realloc(cli, cli->conn.pending, struct tevent_req *,
203 if (pending == NULL) {
206 pending[num_pending] = req;
207 cli->conn.pending = pending;
208 talloc_set_destructor(req, cli_smb_req_destructor);
210 if (cli->conn.read_smb_req != NULL) {
215 * We're the first ones, add the read_smb request that waits for the
216 * answer from the server
218 cli->conn.read_smb_req = read_smb_send(cli->conn.pending, state->ev,
220 if (cli->conn.read_smb_req == NULL) {
221 cli_smb_req_unset_pending(req);
224 tevent_req_set_callback(cli->conn.read_smb_req, cli_smb_received, cli);
229 * Fetch a smb request's mid. Only valid after the request has been sent by
230 * cli_smb_req_send().
232 uint16_t cli_smb_req_mid(struct tevent_req *req)
234 struct cli_smb_state *state = tevent_req_data(
235 req, struct cli_smb_state);
236 return SVAL(state->header, smb_mid);
239 void cli_smb_req_set_mid(struct tevent_req *req, uint16_t mid)
241 struct cli_smb_state *state = tevent_req_data(
242 req, struct cli_smb_state);
246 uint32_t cli_smb_req_seqnum(struct tevent_req *req)
248 struct cli_smb_state *state = tevent_req_data(
249 req, struct cli_smb_state);
250 return state->seqnum;
253 void cli_smb_req_set_seqnum(struct tevent_req *req, uint32_t seqnum)
255 struct cli_smb_state *state = tevent_req_data(
256 req, struct cli_smb_state);
257 state->seqnum = seqnum;
260 static size_t iov_len(const struct iovec *iov, int count)
264 for (i=0; i<count; i++) {
265 result += iov[i].iov_len;
270 static uint8_t *iov_concat(TALLOC_CTX *mem_ctx, const struct iovec *iov,
273 size_t len = iov_len(iov, count);
278 buf = talloc_array(mem_ctx, uint8_t, len);
283 for (i=0; i<count; i++) {
284 memcpy(buf+copied, iov[i].iov_base, iov[i].iov_len);
285 copied += iov[i].iov_len;
290 struct tevent_req *cli_smb_req_create(TALLOC_CTX *mem_ctx,
291 struct event_context *ev,
292 struct cli_state *cli,
294 uint8_t additional_flags,
295 uint8_t wct, uint16_t *vwv,
297 struct iovec *bytes_iov)
299 struct tevent_req *result;
300 struct cli_smb_state *state;
301 struct timeval endtime;
303 if (iov_count > MAX_SMB_IOV) {
305 * Should not happen :-)
310 result = tevent_req_create(mem_ctx, &state, struct cli_smb_state);
311 if (result == NULL) {
316 state->mid = 0; /* Set to auto-choose in cli_smb_req_send */
317 state->chain_num = 0;
318 state->chained_requests = NULL;
320 cli_setup_packet_buf(cli, (char *)state->header);
321 SCVAL(state->header, smb_com, smb_command);
322 SSVAL(state->header, smb_tid, cli->smb1.tid);
323 SCVAL(state->header, smb_wct, wct);
327 SSVAL(state->bytecount_buf, 0, iov_len(bytes_iov, iov_count));
329 state->iov[0].iov_base = (void *)state->header;
330 state->iov[0].iov_len = sizeof(state->header);
331 state->iov[1].iov_base = (void *)state->vwv;
332 state->iov[1].iov_len = wct * sizeof(uint16_t);
333 state->iov[2].iov_base = (void *)state->bytecount_buf;
334 state->iov[2].iov_len = sizeof(uint16_t);
336 if (iov_count != 0) {
337 memcpy(&state->iov[3], bytes_iov,
338 iov_count * sizeof(*bytes_iov));
340 state->iov_count = iov_count + 3;
343 endtime = timeval_current_ofs_msec(cli->timeout);
344 if (!tevent_req_set_endtime(result, ev, endtime)) {
345 tevent_req_oom(result);
351 static NTSTATUS cli_signv(struct cli_state *cli, struct iovec *iov, int count,
357 * Obvious optimization: Make cli_calculate_sign_mac work with struct
358 * iovec directly. MD5Update would do that just fine.
361 if ((count <= 0) || (iov[0].iov_len < smb_wct)) {
362 return NT_STATUS_INVALID_PARAMETER;
365 buf = iov_concat(talloc_tos(), iov, count);
367 return NT_STATUS_NO_MEMORY;
370 cli_calculate_sign_mac(cli, (char *)buf, seqnum);
371 memcpy(iov[0].iov_base, buf, iov[0].iov_len);
377 static void cli_smb_sent(struct tevent_req *subreq);
379 static NTSTATUS cli_smb_req_iov_send(struct tevent_req *req,
380 struct cli_smb_state *state,
381 struct iovec *iov, int iov_count)
383 struct tevent_req *subreq;
386 if (!cli_state_is_connected(state->cli)) {
387 return NT_STATUS_CONNECTION_INVALID;
390 if (iov[0].iov_len < smb_wct) {
391 return NT_STATUS_INVALID_PARAMETER;
394 if (state->mid != 0) {
395 SSVAL(iov[0].iov_base, smb_mid, state->mid);
397 uint16_t mid = cli_alloc_mid(state->cli);
398 SSVAL(iov[0].iov_base, smb_mid, mid);
401 smb_setlen((char *)iov[0].iov_base, iov_len(iov, iov_count) - 4);
403 status = cli_signv(state->cli, iov, iov_count, &state->seqnum);
405 if (!NT_STATUS_IS_OK(status)) {
409 if (cli_encryption_on(state->cli)) {
412 buf = (char *)iov_concat(talloc_tos(), iov, iov_count);
414 return NT_STATUS_NO_MEMORY;
416 status = common_encrypt_buffer(state->cli->trans_enc_state,
417 (char *)buf, &enc_buf);
419 if (!NT_STATUS_IS_OK(status)) {
420 DEBUG(0, ("Error in encrypting client message: %s\n",
424 buf = (char *)talloc_memdup(state, enc_buf,
428 return NT_STATUS_NO_MEMORY;
430 iov[0].iov_base = (void *)buf;
431 iov[0].iov_len = talloc_get_size(buf);
434 subreq = writev_send(state, state->ev, state->cli->conn.outgoing,
435 state->cli->conn.fd, false, iov, iov_count);
436 if (subreq == NULL) {
437 return NT_STATUS_NO_MEMORY;
439 tevent_req_set_callback(subreq, cli_smb_sent, req);
443 NTSTATUS cli_smb_req_send(struct tevent_req *req)
445 struct cli_smb_state *state = tevent_req_data(
446 req, struct cli_smb_state);
448 return cli_smb_req_iov_send(req, state, state->iov, state->iov_count);
451 struct tevent_req *cli_smb_send(TALLOC_CTX *mem_ctx,
452 struct event_context *ev,
453 struct cli_state *cli,
455 uint8_t additional_flags,
456 uint8_t wct, uint16_t *vwv,
458 const uint8_t *bytes)
460 struct tevent_req *req;
464 iov.iov_base = discard_const_p(void, bytes);
465 iov.iov_len = num_bytes;
467 req = cli_smb_req_create(mem_ctx, ev, cli, smb_command,
468 additional_flags, wct, vwv, 1, &iov);
473 status = cli_smb_req_send(req);
474 if (!NT_STATUS_IS_OK(status)) {
475 tevent_req_nterror(req, status);
476 return tevent_req_post(req, ev);
481 static void cli_smb_sent(struct tevent_req *subreq)
483 struct tevent_req *req = tevent_req_callback_data(
484 subreq, struct tevent_req);
485 struct cli_smb_state *state = tevent_req_data(
486 req, struct cli_smb_state);
490 nwritten = writev_recv(subreq, &err);
492 if (nwritten == -1) {
493 cli_state_disconnect(state->cli);
494 tevent_req_nterror(req, map_nt_error_from_unix(err));
498 switch (CVAL(state->header, smb_com)) {
504 tevent_req_done(req);
507 if ((CVAL(state->header, smb_wct) == 8) &&
508 (CVAL(state->vwv+3, 0) == LOCKING_ANDX_OPLOCK_RELEASE)) {
510 tevent_req_done(req);
515 if (!cli_smb_req_set_pending(req)) {
516 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
521 static void cli_smb_received(struct tevent_req *subreq)
523 struct cli_state *cli = tevent_req_callback_data(
524 subreq, struct cli_state);
525 struct tevent_req *req;
526 struct cli_smb_state *state;
535 if (subreq != cli->conn.read_smb_req) {
536 DEBUG(1, ("Internal error: cli_smb_received called with "
537 "unexpected subreq\n"));
538 status = NT_STATUS_INTERNAL_ERROR;
542 received = read_smb_recv(subreq, talloc_tos(), &inbuf, &err);
544 cli->conn.read_smb_req = NULL;
545 if (received == -1) {
546 cli_state_disconnect(cli);
547 status = map_nt_error_from_unix(err);
551 if ((IVAL(inbuf, 4) != 0x424d53ff) /* 0xFF"SMB" */
552 && (SVAL(inbuf, 4) != 0x45ff)) /* 0xFF"E" */ {
553 DEBUG(10, ("Got non-SMB PDU\n"));
554 status = NT_STATUS_INVALID_NETWORK_RESPONSE;
558 if (cli_encryption_on(cli) && (CVAL(inbuf, 0) == 0)) {
559 uint16_t enc_ctx_num;
561 status = get_enc_ctx_num(inbuf, &enc_ctx_num);
562 if (!NT_STATUS_IS_OK(status)) {
563 DEBUG(10, ("get_enc_ctx_num returned %s\n",
568 if (enc_ctx_num != cli->trans_enc_state->enc_ctx_num) {
569 DEBUG(10, ("wrong enc_ctx %d, expected %d\n",
571 cli->trans_enc_state->enc_ctx_num));
572 status = NT_STATUS_INVALID_HANDLE;
576 status = common_decrypt_buffer(cli->trans_enc_state,
578 if (!NT_STATUS_IS_OK(status)) {
579 DEBUG(10, ("common_decrypt_buffer returned %s\n",
585 mid = SVAL(inbuf, smb_mid);
586 num_pending = talloc_array_length(cli->conn.pending);
588 for (i=0; i<num_pending; i++) {
589 if (mid == cli_smb_req_mid(cli->conn.pending[i])) {
593 if (i == num_pending) {
594 /* Dump unexpected reply */
599 oplock_break = false;
603 * Paranoia checks that this is really an oplock break request.
605 oplock_break = (smb_len(inbuf) == 51); /* hdr + 8 words */
606 oplock_break &= ((CVAL(inbuf, smb_flg) & FLAG_REPLY) == 0);
607 oplock_break &= (CVAL(inbuf, smb_com) == SMBlockingX);
608 oplock_break &= (SVAL(inbuf, smb_vwv6) == 0);
609 oplock_break &= (SVAL(inbuf, smb_vwv7) == 0);
612 /* Dump unexpected reply */
618 req = cli->conn.pending[i];
619 state = tevent_req_data(req, struct cli_smb_state);
621 if (!oplock_break /* oplock breaks are not signed */
622 && !cli_check_sign_mac(cli, (char *)inbuf, state->seqnum+1)) {
623 DEBUG(10, ("cli_check_sign_mac failed\n"));
625 status = NT_STATUS_ACCESS_DENIED;
626 cli_state_disconnect(cli);
630 if (state->chained_requests == NULL) {
631 state->inbuf = talloc_move(state, &inbuf);
632 talloc_set_destructor(req, NULL);
633 cli_smb_req_unset_pending(req);
634 state->chain_num = 0;
635 state->chain_length = 1;
636 tevent_req_done(req);
638 struct tevent_req **chain = talloc_move(
639 talloc_tos(), &state->chained_requests);
640 int num_chained = talloc_array_length(chain);
642 for (i=0; i<num_chained; i++) {
643 state = tevent_req_data(chain[i], struct
645 state->inbuf = inbuf;
646 state->chain_num = i;
647 state->chain_length = num_chained;
648 tevent_req_done(chain[i]);
654 if ((talloc_array_length(cli->conn.pending) > 0) &&
655 (cli->conn.read_smb_req == NULL)) {
657 * Set up another read request for the other pending cli_smb
660 state = tevent_req_data(cli->conn.pending[0],
661 struct cli_smb_state);
662 cli->conn.read_smb_req = read_smb_send(
663 cli->conn.pending, state->ev, cli->conn.fd);
664 if (cli->conn.read_smb_req == NULL) {
665 status = NT_STATUS_NO_MEMORY;
668 tevent_req_set_callback(cli->conn.read_smb_req,
669 cli_smb_received, cli);
674 * Cancel all pending requests. We don't do a for-loop walking
675 * cli->conn.pending because that array changes in
676 * cli_smb_req_destructor().
678 while (talloc_array_length(cli->conn.pending) > 0) {
679 req = cli->conn.pending[0];
680 talloc_set_destructor(req, NULL);
681 cli_smb_req_unset_pending(req);
682 tevent_req_nterror(req, status);
686 NTSTATUS cli_smb_recv(struct tevent_req *req,
687 TALLOC_CTX *mem_ctx, uint8_t **pinbuf,
688 uint8_t min_wct, uint8_t *pwct, uint16_t **pvwv,
689 uint32_t *pnum_bytes, uint8_t **pbytes)
691 struct cli_smb_state *state = tevent_req_data(
692 req, struct cli_smb_state);
693 NTSTATUS status = NT_STATUS_OK;
696 size_t wct_ofs, bytes_offset;
699 if (tevent_req_is_nterror(req, &status)) {
703 if (state->inbuf == NULL) {
705 return NT_STATUS_INVALID_NETWORK_RESPONSE;
722 /* This was a request without a reply */
727 cmd = CVAL(state->inbuf, smb_com);
729 for (i=0; i<state->chain_num; i++) {
730 if (i < state->chain_num-1) {
732 return NT_STATUS_REQUEST_ABORTED;
734 if (!is_andx_req(cmd)) {
735 return NT_STATUS_INVALID_NETWORK_RESPONSE;
739 if (!have_andx_command((char *)state->inbuf, wct_ofs)) {
741 * This request was not completed because a previous
742 * request in the chain had received an error.
744 return NT_STATUS_REQUEST_ABORTED;
747 wct_ofs = SVAL(state->inbuf, wct_ofs + 3);
750 * Skip the all-present length field. No overflow, we've just
751 * put a 16-bit value into a size_t.
755 if (wct_ofs+2 > talloc_get_size(state->inbuf)) {
756 return NT_STATUS_INVALID_NETWORK_RESPONSE;
759 cmd = CVAL(state->inbuf, wct_ofs + 1);
762 state->cli->raw_status = cli_pull_raw_error(state->inbuf);
763 if (NT_STATUS_IS_DOS(state->cli->raw_status)) {
764 uint8_t eclass = NT_STATUS_DOS_CLASS(state->cli->raw_status);
765 uint16_t ecode = NT_STATUS_DOS_CODE(state->cli->raw_status);
767 * TODO: is it really a good idea to do a mapping here?
769 * The old cli_pull_error() also does it, so I do not change
772 status = dos_to_ntstatus(eclass, ecode);
774 status = state->cli->raw_status;
777 if (!have_andx_command((char *)state->inbuf, wct_ofs)) {
779 if ((cmd == SMBsesssetupX)
781 status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
783 * NT_STATUS_MORE_PROCESSING_REQUIRED is a
784 * valid return code for session setup
789 if (NT_STATUS_IS_ERR(status)) {
791 * The last command takes the error code. All
792 * further commands down the requested chain
793 * will get a NT_STATUS_REQUEST_ABORTED.
801 wct = CVAL(state->inbuf, wct_ofs);
802 bytes_offset = wct_ofs + 1 + wct * sizeof(uint16_t);
803 num_bytes = SVAL(state->inbuf, bytes_offset);
806 return NT_STATUS_INVALID_NETWORK_RESPONSE;
810 * wct_ofs is a 16-bit value plus 4, wct is a 8-bit value, num_bytes
811 * is a 16-bit value. So bytes_offset being size_t should be far from
814 if ((bytes_offset + 2 > talloc_get_size(state->inbuf))
815 || (bytes_offset > 0xffff)) {
816 return NT_STATUS_INVALID_NETWORK_RESPONSE;
823 *pvwv = (uint16_t *)(state->inbuf + wct_ofs + 1);
825 if (pnum_bytes != NULL) {
826 *pnum_bytes = num_bytes;
828 if (pbytes != NULL) {
829 *pbytes = (uint8_t *)state->inbuf + bytes_offset + 2;
831 if ((mem_ctx != NULL) && (pinbuf != NULL)) {
832 if (state->chain_num == state->chain_length-1) {
833 *pinbuf = talloc_move(mem_ctx, &state->inbuf);
835 *pinbuf = state->inbuf;
842 size_t cli_smb_wct_ofs(struct tevent_req **reqs, int num_reqs)
847 wct_ofs = smb_wct - 4;
849 for (i=0; i<num_reqs; i++) {
850 struct cli_smb_state *state;
851 state = tevent_req_data(reqs[i], struct cli_smb_state);
852 wct_ofs += iov_len(state->iov+1, state->iov_count-1);
853 wct_ofs = (wct_ofs + 3) & ~3;
858 NTSTATUS cli_smb_chain_send(struct tevent_req **reqs, int num_reqs)
860 struct cli_smb_state *first_state = tevent_req_data(
861 reqs[0], struct cli_smb_state);
862 struct cli_smb_state *last_state = tevent_req_data(
863 reqs[num_reqs-1], struct cli_smb_state);
864 struct cli_smb_state *state;
866 size_t chain_padding = 0;
868 struct iovec *iov = NULL;
869 struct iovec *this_iov;
873 for (i=0; i<num_reqs; i++) {
874 state = tevent_req_data(reqs[i], struct cli_smb_state);
875 iovlen += state->iov_count;
878 iov = talloc_array(last_state, struct iovec, iovlen);
880 return NT_STATUS_NO_MEMORY;
883 first_state->chained_requests = (struct tevent_req **)talloc_memdup(
884 last_state, reqs, sizeof(*reqs) * num_reqs);
885 if (first_state->chained_requests == NULL) {
887 return NT_STATUS_NO_MEMORY;
890 wct_offset = smb_wct - 4;
893 for (i=0; i<num_reqs; i++) {
894 size_t next_padding = 0;
897 state = tevent_req_data(reqs[i], struct cli_smb_state);
899 if (i < num_reqs-1) {
900 if (!is_andx_req(CVAL(state->header, smb_com))
901 || CVAL(state->header, smb_wct) < 2) {
903 TALLOC_FREE(first_state->chained_requests);
904 return NT_STATUS_INVALID_PARAMETER;
908 wct_offset += iov_len(state->iov+1, state->iov_count-1) + 1;
909 if ((wct_offset % 4) != 0) {
910 next_padding = 4 - (wct_offset % 4);
912 wct_offset += next_padding;
915 if (i < num_reqs-1) {
916 struct cli_smb_state *next_state = tevent_req_data(
917 reqs[i+1], struct cli_smb_state);
918 SCVAL(vwv+0, 0, CVAL(next_state->header, smb_com));
920 SSVAL(vwv+1, 0, wct_offset);
921 } else if (is_andx_req(CVAL(state->header, smb_com))) {
922 /* properly end the chain */
923 SCVAL(vwv+0, 0, 0xff);
924 SCVAL(vwv+0, 1, 0xff);
929 this_iov[0] = state->iov[0];
932 * This one is a bit subtle. We have to add
933 * chain_padding bytes between the requests, and we
934 * have to also include the wct field of the
935 * subsequent requests. We use the subsequent header
936 * for the padding, it contains the wct field in its
939 this_iov[0].iov_len = chain_padding+1;
940 this_iov[0].iov_base = (void *)&state->header[
941 sizeof(state->header) - this_iov[0].iov_len];
942 memset(this_iov[0].iov_base, 0, this_iov[0].iov_len-1);
944 memcpy(this_iov+1, state->iov+1,
945 sizeof(struct iovec) * (state->iov_count-1));
946 this_iov += state->iov_count;
947 chain_padding = next_padding;
950 status = cli_smb_req_iov_send(reqs[0], last_state, iov, iovlen);
951 if (!NT_STATUS_IS_OK(status)) {
953 TALLOC_FREE(first_state->chained_requests);
960 bool cli_has_async_calls(struct cli_state *cli)
962 return ((tevent_queue_length(cli->conn.outgoing) != 0)
963 || (talloc_array_length(cli->conn.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;