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"
31 * Fetch an error out of a NBT packet
32 * @param[in] buf The SMB packet
33 * @retval The error, converted to NTSTATUS
36 NTSTATUS cli_pull_error(char *buf)
38 uint32_t flags2 = SVAL(buf, smb_flg2);
40 if (flags2 & FLAGS2_32_BIT_ERROR_CODES) {
41 return NT_STATUS(IVAL(buf, smb_rcls));
44 return dos_to_ntstatus(CVAL(buf, smb_rcls), SVAL(buf,smb_err));
48 * Compatibility helper for the sync APIs: Fake NTSTATUS in cli->inbuf
49 * @param[in] cli The client connection that just received an error
50 * @param[in] status The error to set on "cli"
53 void cli_set_error(struct cli_state *cli, NTSTATUS status)
55 uint32_t flags2 = SVAL(cli->inbuf, smb_flg2);
57 if (NT_STATUS_IS_DOS(status)) {
58 SSVAL(cli->inbuf, smb_flg2,
59 flags2 & ~FLAGS2_32_BIT_ERROR_CODES);
60 SCVAL(cli->inbuf, smb_rcls, NT_STATUS_DOS_CLASS(status));
61 SSVAL(cli->inbuf, smb_err, NT_STATUS_DOS_CODE(status));
65 SSVAL(cli->inbuf, smb_flg2, flags2 | FLAGS2_32_BIT_ERROR_CODES);
66 SIVAL(cli->inbuf, smb_rcls, NT_STATUS_V(status));
71 * Figure out if there is an andx command behind the current one
72 * @param[in] buf The smb buffer to look at
73 * @param[in] ofs The offset to the wct field that is followed by the cmd
74 * @retval Is there a command following?
77 static bool have_andx_command(const char *buf, uint16_t ofs)
80 size_t buflen = talloc_get_size(buf);
82 if ((ofs == buflen-1) || (ofs == buflen)) {
89 * Not enough space for the command and a following pointer
93 return (CVAL(buf, ofs+1) != 0xff);
98 struct cli_smb_state {
99 struct tevent_context *ev;
100 struct cli_state *cli;
101 uint8_t header[smb_wct+1]; /* Space for the header including the wct */
104 * For normal requests, cli_smb_req_send chooses a mid. Secondary
105 * trans requests need to use the mid of the primary request, so we
106 * need a place to store it. Assume it's set if != 0.
111 uint8_t bytecount_buf[2];
113 struct iovec iov[MAX_SMB_IOV+3];
120 struct tevent_req **chained_requests;
123 static uint16_t cli_alloc_mid(struct cli_state *cli)
125 int num_pending = talloc_array_length(cli->pending);
132 if ((result == 0) || (result == 0xffff)) {
136 for (i=0; i<num_pending; i++) {
137 if (result == cli_smb_req_mid(cli->pending[i])) {
142 if (i == num_pending) {
148 void cli_smb_req_unset_pending(struct tevent_req *req)
150 struct cli_smb_state *state = tevent_req_data(
151 req, struct cli_smb_state);
152 struct cli_state *cli = state->cli;
153 int num_pending = talloc_array_length(cli->pending);
156 if (num_pending == 1) {
158 * The pending read_smb tevent_req is a child of
159 * cli->pending. So if nothing is pending anymore, we need to
160 * delete the socket read fde.
162 TALLOC_FREE(cli->pending);
166 for (i=0; i<num_pending; i++) {
167 if (req == cli->pending[i]) {
171 if (i == num_pending) {
173 * Something's seriously broken. Just returning here is the
174 * right thing nevertheless, the point of this routine is to
175 * remove ourselves from cli->pending.
181 * Remove ourselves from the cli->pending array
183 cli->pending[i] = cli->pending[num_pending-1];
186 * No NULL check here, we're shrinking by sizeof(void *), and
187 * talloc_realloc just adjusts the size for this.
189 cli->pending = talloc_realloc(NULL, cli->pending, struct tevent_req *,
194 static int cli_smb_req_destructor(struct tevent_req *req)
196 cli_smb_req_unset_pending(req);
200 static void cli_smb_received(struct tevent_req *subreq);
202 bool cli_smb_req_set_pending(struct tevent_req *req)
204 struct cli_smb_state *state = tevent_req_data(
205 req, struct cli_smb_state);
206 struct cli_state *cli;
207 struct tevent_req **pending;
209 struct tevent_req *subreq;
212 num_pending = talloc_array_length(cli->pending);
214 pending = talloc_realloc(cli, cli->pending, struct tevent_req *,
216 if (pending == NULL) {
219 pending[num_pending] = req;
220 cli->pending = pending;
221 talloc_set_destructor(req, cli_smb_req_destructor);
223 if (num_pending > 0) {
228 * We're the first ones, add the read_smb request that waits for the
229 * answer from the server
231 subreq = read_smb_send(cli->pending, state->ev, cli->fd);
232 if (subreq == NULL) {
233 cli_smb_req_unset_pending(req);
236 tevent_req_set_callback(subreq, cli_smb_received, cli);
241 * Fetch a smb request's mid. Only valid after the request has been sent by
242 * cli_smb_req_send().
244 uint16_t cli_smb_req_mid(struct tevent_req *req)
246 struct cli_smb_state *state = tevent_req_data(
247 req, struct cli_smb_state);
248 return SVAL(state->header, smb_mid);
251 void cli_smb_req_set_mid(struct tevent_req *req, uint16_t mid)
253 struct cli_smb_state *state = tevent_req_data(
254 req, struct cli_smb_state);
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_nomem(NULL, 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_destructor(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_destructor(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 status = cli_pull_error((char *)state->inbuf);
757 cli_set_error(state->cli, status);
759 if (!have_andx_command((char *)state->inbuf, wct_ofs)) {
761 if ((cmd == SMBsesssetupX)
763 status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
765 * NT_STATUS_MORE_PROCESSING_REQUIRED is a
766 * valid return code for session setup
771 if (NT_STATUS_IS_ERR(status)) {
773 * The last command takes the error code. All
774 * further commands down the requested chain
775 * will get a NT_STATUS_REQUEST_ABORTED.
783 wct = CVAL(state->inbuf, wct_ofs);
784 bytes_offset = wct_ofs + 1 + wct * sizeof(uint16_t);
785 num_bytes = SVAL(state->inbuf, bytes_offset);
788 return NT_STATUS_INVALID_NETWORK_RESPONSE;
792 * wct_ofs is a 16-bit value plus 4, wct is a 8-bit value, num_bytes
793 * is a 16-bit value. So bytes_offset being size_t should be far from
796 if ((bytes_offset + 2 > talloc_get_size(state->inbuf))
797 || (bytes_offset > 0xffff)) {
798 return NT_STATUS_INVALID_NETWORK_RESPONSE;
805 *pvwv = (uint16_t *)(state->inbuf + wct_ofs + 1);
807 if (pnum_bytes != NULL) {
808 *pnum_bytes = num_bytes;
810 if (pbytes != NULL) {
811 *pbytes = (uint8_t *)state->inbuf + bytes_offset + 2;
813 if ((mem_ctx != NULL) && (pinbuf != NULL)) {
814 if (state->chain_num == state->chain_length-1) {
815 *pinbuf = talloc_move(mem_ctx, &state->inbuf);
817 *pinbuf = state->inbuf;
824 size_t cli_smb_wct_ofs(struct tevent_req **reqs, int num_reqs)
829 wct_ofs = smb_wct - 4;
831 for (i=0; i<num_reqs; i++) {
832 struct cli_smb_state *state;
833 state = tevent_req_data(reqs[i], struct cli_smb_state);
834 wct_ofs += iov_len(state->iov+1, state->iov_count-1);
835 wct_ofs = (wct_ofs + 3) & ~3;
840 NTSTATUS cli_smb_chain_send(struct tevent_req **reqs, int num_reqs)
842 struct cli_smb_state *first_state = tevent_req_data(
843 reqs[0], struct cli_smb_state);
844 struct cli_smb_state *last_state = tevent_req_data(
845 reqs[num_reqs-1], struct cli_smb_state);
846 struct cli_smb_state *state;
848 size_t chain_padding = 0;
850 struct iovec *iov = NULL;
851 struct iovec *this_iov;
855 for (i=0; i<num_reqs; i++) {
856 state = tevent_req_data(reqs[i], struct cli_smb_state);
857 iovlen += state->iov_count;
860 iov = talloc_array(last_state, struct iovec, iovlen);
862 return NT_STATUS_NO_MEMORY;
865 first_state->chained_requests = (struct tevent_req **)talloc_memdup(
866 last_state, reqs, sizeof(*reqs) * num_reqs);
867 if (first_state->chained_requests == NULL) {
869 return NT_STATUS_NO_MEMORY;
872 wct_offset = smb_wct - 4;
875 for (i=0; i<num_reqs; i++) {
876 size_t next_padding = 0;
879 state = tevent_req_data(reqs[i], struct cli_smb_state);
881 if (i < num_reqs-1) {
882 if (!is_andx_req(CVAL(state->header, smb_com))
883 || CVAL(state->header, smb_wct) < 2) {
885 TALLOC_FREE(first_state->chained_requests);
886 return NT_STATUS_INVALID_PARAMETER;
890 wct_offset += iov_len(state->iov+1, state->iov_count-1) + 1;
891 if ((wct_offset % 4) != 0) {
892 next_padding = 4 - (wct_offset % 4);
894 wct_offset += next_padding;
897 if (i < num_reqs-1) {
898 struct cli_smb_state *next_state = tevent_req_data(
899 reqs[i+1], struct cli_smb_state);
900 SCVAL(vwv+0, 0, CVAL(next_state->header, smb_com));
902 SSVAL(vwv+1, 0, wct_offset);
903 } else if (is_andx_req(CVAL(state->header, smb_com))) {
904 /* properly end the chain */
905 SCVAL(vwv+0, 0, 0xff);
906 SCVAL(vwv+0, 1, 0xff);
911 this_iov[0] = state->iov[0];
914 * This one is a bit subtle. We have to add
915 * chain_padding bytes between the requests, and we
916 * have to also include the wct field of the
917 * subsequent requests. We use the subsequent header
918 * for the padding, it contains the wct field in its
921 this_iov[0].iov_len = chain_padding+1;
922 this_iov[0].iov_base = (void *)&state->header[
923 sizeof(state->header) - this_iov[0].iov_len];
924 memset(this_iov[0].iov_base, 0, this_iov[0].iov_len-1);
926 memcpy(this_iov+1, state->iov+1,
927 sizeof(struct iovec) * (state->iov_count-1));
928 this_iov += state->iov_count;
929 chain_padding = next_padding;
932 status = cli_smb_req_iov_send(reqs[0], last_state, iov, iovlen);
933 if (!NT_STATUS_IS_OK(status)) {
935 TALLOC_FREE(first_state->chained_requests);
942 uint8_t *cli_smb_inbuf(struct tevent_req *req)
944 struct cli_smb_state *state = tevent_req_data(
945 req, struct cli_smb_state);
949 bool cli_has_async_calls(struct cli_state *cli)
951 return ((tevent_queue_length(cli->outgoing) != 0)
952 || (talloc_array_length(cli->pending) != 0));
955 struct cli_smb_oplock_break_waiter_state {
960 static void cli_smb_oplock_break_waiter_done(struct tevent_req *subreq);
962 struct tevent_req *cli_smb_oplock_break_waiter_send(TALLOC_CTX *mem_ctx,
963 struct event_context *ev,
964 struct cli_state *cli)
966 struct tevent_req *req, *subreq;
967 struct cli_smb_oplock_break_waiter_state *state;
968 struct cli_smb_state *smb_state;
970 req = tevent_req_create(mem_ctx, &state,
971 struct cli_smb_oplock_break_waiter_state);
977 * Create a fake SMB request that we will never send out. This is only
978 * used to be set into the pending queue with the right mid.
980 subreq = cli_smb_req_create(mem_ctx, ev, cli, 0, 0, 0, NULL, 0, NULL);
981 if (tevent_req_nomem(subreq, req)) {
982 return tevent_req_post(req, ev);
984 smb_state = tevent_req_data(subreq, struct cli_smb_state);
985 SSVAL(smb_state->header, smb_mid, 0xffff);
987 if (!cli_smb_req_set_pending(subreq)) {
988 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
989 return tevent_req_post(req, ev);
991 tevent_req_set_callback(subreq, cli_smb_oplock_break_waiter_done, req);
995 static void cli_smb_oplock_break_waiter_done(struct tevent_req *subreq)
997 struct tevent_req *req = tevent_req_callback_data(
998 subreq, struct tevent_req);
999 struct cli_smb_oplock_break_waiter_state *state = tevent_req_data(
1000 req, struct cli_smb_oplock_break_waiter_state);
1008 status = cli_smb_recv(subreq, state, &inbuf, 8, &wct, &vwv,
1009 &num_bytes, &bytes);
1010 TALLOC_FREE(subreq);
1011 if (!NT_STATUS_IS_OK(status)) {
1012 tevent_req_nterror(req, status);
1015 state->fnum = SVAL(vwv+2, 0);
1016 state->level = CVAL(vwv+3, 1);
1017 tevent_req_done(req);
1020 NTSTATUS cli_smb_oplock_break_waiter_recv(struct tevent_req *req,
1024 struct cli_smb_oplock_break_waiter_state *state = tevent_req_data(
1025 req, struct cli_smb_oplock_break_waiter_state);
1028 if (tevent_req_is_nterror(req, &status)) {
1031 *pfnum = state->fnum;
1032 *plevel = state->level;
1033 return NT_STATUS_OK;
1037 struct cli_session_request_state {
1038 struct tevent_context *ev;
1041 struct iovec iov[3];
1042 uint8_t nb_session_response;
1045 static void cli_session_request_sent(struct tevent_req *subreq);
1046 static void cli_session_request_recvd(struct tevent_req *subreq);
1048 struct tevent_req *cli_session_request_send(TALLOC_CTX *mem_ctx,
1049 struct tevent_context *ev,
1051 const struct nmb_name *called,
1052 const struct nmb_name *calling)
1054 struct tevent_req *req, *subreq;
1055 struct cli_session_request_state *state;
1057 req = tevent_req_create(mem_ctx, &state,
1058 struct cli_session_request_state);
1065 state->iov[1].iov_base = name_mangle(
1066 state, called->name, called->name_type);
1067 if (tevent_req_nomem(state->iov[1].iov_base, req)) {
1068 return tevent_req_post(req, ev);
1070 state->iov[1].iov_len = name_len(
1071 (unsigned char *)state->iov[1].iov_base,
1072 talloc_get_size(state->iov[1].iov_base));
1074 state->iov[2].iov_base = name_mangle(
1075 state, calling->name, calling->name_type);
1076 if (tevent_req_nomem(state->iov[2].iov_base, req)) {
1077 return tevent_req_post(req, ev);
1079 state->iov[2].iov_len = name_len(
1080 (unsigned char *)state->iov[2].iov_base,
1081 talloc_get_size(state->iov[2].iov_base));
1083 _smb_setlen(((char *)&state->len_hdr),
1084 state->iov[1].iov_len + state->iov[2].iov_len);
1085 SCVAL((char *)&state->len_hdr, 0, 0x81);
1087 state->iov[0].iov_base = &state->len_hdr;
1088 state->iov[0].iov_len = sizeof(state->len_hdr);
1090 subreq = writev_send(state, ev, NULL, sock, true, state->iov, 3);
1091 if (tevent_req_nomem(subreq, req)) {
1092 return tevent_req_post(req, ev);
1094 tevent_req_set_callback(subreq, cli_session_request_sent, req);
1098 static void cli_session_request_sent(struct tevent_req *subreq)
1100 struct tevent_req *req = tevent_req_callback_data(
1101 subreq, struct tevent_req);
1102 struct cli_session_request_state *state = tevent_req_data(
1103 req, struct cli_session_request_state);
1107 ret = writev_recv(subreq, &err);
1108 TALLOC_FREE(subreq);
1110 tevent_req_error(req, err);
1113 subreq = read_smb_send(state, state->ev, state->sock);
1114 if (tevent_req_nomem(subreq, req)) {
1117 tevent_req_set_callback(subreq, cli_session_request_recvd, req);
1120 static void cli_session_request_recvd(struct tevent_req *subreq)
1122 struct tevent_req *req = tevent_req_callback_data(
1123 subreq, struct tevent_req);
1124 struct cli_session_request_state *state = tevent_req_data(
1125 req, struct cli_session_request_state);
1130 ret = read_smb_recv(subreq, talloc_tos(), &buf, &err);
1131 TALLOC_FREE(subreq);
1138 tevent_req_error(req, err);
1142 * In case of an error there is more information in the data
1143 * portion according to RFC1002. We're not subtle enough to
1144 * respond to the different error conditions, so drop the
1147 state->nb_session_response = CVAL(buf, 0);
1148 tevent_req_done(req);
1151 bool cli_session_request_recv(struct tevent_req *req, int *err, uint8_t *resp)
1153 struct cli_session_request_state *state = tevent_req_data(
1154 req, struct cli_session_request_state);
1156 if (tevent_req_is_unix_error(req, err)) {
1159 *resp = state->nb_session_response;