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 talloc_set_destructor(req, NULL);
137 if (num_pending == 1) {
139 * The pending read_smb tevent_req is a child of
140 * cli->pending. So if nothing is pending anymore, we need to
141 * delete the socket read fde.
143 TALLOC_FREE(cli->conn.pending);
144 cli->conn.read_smb_req = NULL;
148 for (i=0; i<num_pending; i++) {
149 if (req == cli->conn.pending[i]) {
153 if (i == num_pending) {
155 * Something's seriously broken. Just returning here is the
156 * right thing nevertheless, the point of this routine is to
157 * remove ourselves from cli->conn.pending.
163 * Remove ourselves from the cli->conn.pending array
165 for (; i < (num_pending - 1); i++) {
166 cli->conn.pending[i] = cli->conn.pending[i+1];
170 * No NULL check here, we're shrinking by sizeof(void *), and
171 * talloc_realloc just adjusts the size for this.
173 cli->conn.pending = talloc_realloc(NULL, cli->conn.pending,
179 static int cli_smb_req_destructor(struct tevent_req *req)
181 struct cli_smb_state *state = tevent_req_data(
182 req, struct cli_smb_state);
184 * Make sure we really remove it from
185 * the pending array on destruction.
188 cli_smb_req_unset_pending(req);
192 static bool cli_state_receive_next(struct cli_state *cli);
193 static void cli_state_notify_pending(struct cli_state *cli, NTSTATUS status);
195 bool cli_smb_req_set_pending(struct tevent_req *req)
197 struct cli_smb_state *state = tevent_req_data(
198 req, struct cli_smb_state);
199 struct cli_state *cli;
200 struct tevent_req **pending;
204 num_pending = talloc_array_length(cli->conn.pending);
206 pending = talloc_realloc(cli, cli->conn.pending, struct tevent_req *,
208 if (pending == NULL) {
211 pending[num_pending] = req;
212 cli->conn.pending = pending;
213 talloc_set_destructor(req, cli_smb_req_destructor);
215 if (!cli_state_receive_next(cli)) {
217 * the caller should notify the current request
219 * And all other pending requests get notified
220 * by cli_state_notify_pending().
222 cli_smb_req_unset_pending(req);
223 cli_state_notify_pending(cli, NT_STATUS_NO_MEMORY);
230 static void cli_smb_received(struct tevent_req *subreq);
231 static NTSTATUS cli_state_dispatch_smb1(struct cli_state *cli,
235 static bool cli_state_receive_next(struct cli_state *cli)
237 size_t num_pending = talloc_array_length(cli->conn.pending);
238 struct tevent_req *req;
239 struct cli_smb_state *state;
241 if (cli->conn.read_smb_req != NULL) {
245 if (num_pending == 0) {
249 req = cli->conn.pending[0];
250 state = tevent_req_data(req, struct cli_smb_state);
252 cli->conn.dispatch_incoming = cli_state_dispatch_smb1;
255 * We're the first ones, add the read_smb request that waits for the
256 * answer from the server
258 cli->conn.read_smb_req = read_smb_send(cli->conn.pending, state->ev,
260 if (cli->conn.read_smb_req == NULL) {
263 tevent_req_set_callback(cli->conn.read_smb_req, cli_smb_received, cli);
267 static void cli_state_notify_pending(struct cli_state *cli, NTSTATUS status)
269 cli_state_disconnect(cli);
272 * Cancel all pending requests. We do not do a for-loop walking
273 * cli->conn.pending because that array changes in
274 * cli_smb_req_destructor().
276 while (talloc_array_length(cli->conn.pending) > 0) {
277 struct tevent_req *req;
278 struct cli_smb_state *state;
280 req = cli->conn.pending[0];
281 state = tevent_req_data(req, struct cli_smb_state);
283 cli_smb_req_unset_pending(req);
286 * we need to defer the callback, because we may notify more
289 tevent_req_defer_callback(req, state->ev);
290 tevent_req_nterror(req, status);
295 * Fetch a smb request's mid. Only valid after the request has been sent by
296 * cli_smb_req_send().
298 uint16_t cli_smb_req_mid(struct tevent_req *req)
300 struct cli_smb_state *state = tevent_req_data(
301 req, struct cli_smb_state);
302 return SVAL(state->header, smb_mid);
305 void cli_smb_req_set_mid(struct tevent_req *req, uint16_t mid)
307 struct cli_smb_state *state = tevent_req_data(
308 req, struct cli_smb_state);
312 uint32_t cli_smb_req_seqnum(struct tevent_req *req)
314 struct cli_smb_state *state = tevent_req_data(
315 req, struct cli_smb_state);
316 return state->seqnum;
319 void cli_smb_req_set_seqnum(struct tevent_req *req, uint32_t seqnum)
321 struct cli_smb_state *state = tevent_req_data(
322 req, struct cli_smb_state);
323 state->seqnum = seqnum;
326 static size_t iov_len(const struct iovec *iov, int count)
330 for (i=0; i<count; i++) {
331 result += iov[i].iov_len;
336 static uint8_t *iov_concat(TALLOC_CTX *mem_ctx, const struct iovec *iov,
339 size_t len = iov_len(iov, count);
344 buf = talloc_array(mem_ctx, uint8_t, len);
349 for (i=0; i<count; i++) {
350 memcpy(buf+copied, iov[i].iov_base, iov[i].iov_len);
351 copied += iov[i].iov_len;
356 struct tevent_req *cli_smb_req_create(TALLOC_CTX *mem_ctx,
357 struct event_context *ev,
358 struct cli_state *cli,
360 uint8_t additional_flags,
361 uint8_t wct, uint16_t *vwv,
363 struct iovec *bytes_iov)
365 struct tevent_req *result;
366 struct cli_smb_state *state;
367 struct timeval endtime;
369 if (iov_count > MAX_SMB_IOV) {
371 * Should not happen :-)
376 result = tevent_req_create(mem_ctx, &state, struct cli_smb_state);
377 if (result == NULL) {
382 state->mid = 0; /* Set to auto-choose in cli_smb_req_send */
383 state->chain_num = 0;
384 state->chained_requests = NULL;
386 cli_setup_packet_buf(cli, (char *)state->header);
387 SCVAL(state->header, smb_com, smb_command);
388 SSVAL(state->header, smb_tid, cli->smb1.tid);
389 SCVAL(state->header, smb_wct, wct);
393 SSVAL(state->bytecount_buf, 0, iov_len(bytes_iov, iov_count));
395 state->iov[0].iov_base = (void *)state->header;
396 state->iov[0].iov_len = sizeof(state->header);
397 state->iov[1].iov_base = (void *)state->vwv;
398 state->iov[1].iov_len = wct * sizeof(uint16_t);
399 state->iov[2].iov_base = (void *)state->bytecount_buf;
400 state->iov[2].iov_len = sizeof(uint16_t);
402 if (iov_count != 0) {
403 memcpy(&state->iov[3], bytes_iov,
404 iov_count * sizeof(*bytes_iov));
406 state->iov_count = iov_count + 3;
409 endtime = timeval_current_ofs_msec(cli->timeout);
410 if (!tevent_req_set_endtime(result, ev, endtime)) {
411 tevent_req_oom(result);
417 static NTSTATUS cli_signv(struct cli_state *cli, struct iovec *iov, int count,
423 * Obvious optimization: Make cli_calculate_sign_mac work with struct
424 * iovec directly. MD5Update would do that just fine.
427 if ((count <= 0) || (iov[0].iov_len < smb_wct)) {
428 return NT_STATUS_INVALID_PARAMETER;
431 buf = iov_concat(talloc_tos(), iov, count);
433 return NT_STATUS_NO_MEMORY;
436 cli_calculate_sign_mac(cli, (char *)buf, seqnum);
437 memcpy(iov[0].iov_base, buf, iov[0].iov_len);
443 static void cli_smb_sent(struct tevent_req *subreq);
445 static NTSTATUS cli_smb_req_iov_send(struct tevent_req *req,
446 struct cli_smb_state *state,
447 struct iovec *iov, int iov_count)
449 struct tevent_req *subreq;
452 if (!cli_state_is_connected(state->cli)) {
453 return NT_STATUS_CONNECTION_INVALID;
456 if (iov[0].iov_len < smb_wct) {
457 return NT_STATUS_INVALID_PARAMETER;
460 if (state->mid != 0) {
461 SSVAL(iov[0].iov_base, smb_mid, state->mid);
463 uint16_t mid = cli_alloc_mid(state->cli);
464 SSVAL(iov[0].iov_base, smb_mid, mid);
467 smb_setlen((char *)iov[0].iov_base, iov_len(iov, iov_count) - 4);
469 status = cli_signv(state->cli, iov, iov_count, &state->seqnum);
471 if (!NT_STATUS_IS_OK(status)) {
475 if (cli_encryption_on(state->cli)) {
478 buf = (char *)iov_concat(talloc_tos(), iov, iov_count);
480 return NT_STATUS_NO_MEMORY;
482 status = common_encrypt_buffer(state->cli->trans_enc_state,
483 (char *)buf, &enc_buf);
485 if (!NT_STATUS_IS_OK(status)) {
486 DEBUG(0, ("Error in encrypting client message: %s\n",
490 buf = (char *)talloc_memdup(state, enc_buf,
494 return NT_STATUS_NO_MEMORY;
496 iov[0].iov_base = (void *)buf;
497 iov[0].iov_len = talloc_get_size(buf);
500 subreq = writev_send(state, state->ev, state->cli->conn.outgoing,
501 state->cli->conn.fd, false, iov, iov_count);
502 if (subreq == NULL) {
503 return NT_STATUS_NO_MEMORY;
505 tevent_req_set_callback(subreq, cli_smb_sent, req);
509 NTSTATUS cli_smb_req_send(struct tevent_req *req)
511 struct cli_smb_state *state = tevent_req_data(
512 req, struct cli_smb_state);
514 return cli_smb_req_iov_send(req, state, state->iov, state->iov_count);
517 struct tevent_req *cli_smb_send(TALLOC_CTX *mem_ctx,
518 struct event_context *ev,
519 struct cli_state *cli,
521 uint8_t additional_flags,
522 uint8_t wct, uint16_t *vwv,
524 const uint8_t *bytes)
526 struct tevent_req *req;
530 iov.iov_base = discard_const_p(void, bytes);
531 iov.iov_len = num_bytes;
533 req = cli_smb_req_create(mem_ctx, ev, cli, smb_command,
534 additional_flags, wct, vwv, 1, &iov);
539 status = cli_smb_req_send(req);
540 if (!NT_STATUS_IS_OK(status)) {
541 tevent_req_nterror(req, status);
542 return tevent_req_post(req, ev);
547 static void cli_smb_sent(struct tevent_req *subreq)
549 struct tevent_req *req = tevent_req_callback_data(
550 subreq, struct tevent_req);
551 struct cli_smb_state *state = tevent_req_data(
552 req, struct cli_smb_state);
556 nwritten = writev_recv(subreq, &err);
558 if (nwritten == -1) {
559 NTSTATUS status = map_nt_error_from_unix(err);
560 cli_state_notify_pending(state->cli, status);
564 switch (CVAL(state->header, smb_com)) {
570 tevent_req_done(req);
573 if ((CVAL(state->header, smb_wct) == 8) &&
574 (CVAL(state->vwv+3, 0) == LOCKING_ANDX_OPLOCK_RELEASE)) {
576 tevent_req_done(req);
581 if (!cli_smb_req_set_pending(req)) {
582 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
587 static void cli_smb_received(struct tevent_req *subreq)
589 struct cli_state *cli = tevent_req_callback_data(
590 subreq, struct cli_state);
591 TALLOC_CTX *frame = talloc_stackframe();
597 if (subreq != cli->conn.read_smb_req) {
598 DEBUG(1, ("Internal error: cli_smb_received called with "
599 "unexpected subreq\n"));
600 status = NT_STATUS_INTERNAL_ERROR;
601 cli_state_notify_pending(cli, status);
606 received = read_smb_recv(subreq, frame, &inbuf, &err);
608 cli->conn.read_smb_req = NULL;
609 if (received == -1) {
610 status = map_nt_error_from_unix(err);
611 cli_state_notify_pending(cli, status);
616 status = cli->conn.dispatch_incoming(cli, frame, inbuf);
618 if (NT_STATUS_IS_OK(status)) {
620 * We should not do any more processing
621 * as the dispatch function called
625 } else if (!NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
627 * We got an error, so notify all pending requests
629 cli_state_notify_pending(cli, status);
634 * We got NT_STATUS_RETRY, so we may ask for a
637 if (!cli_state_receive_next(cli)) {
638 cli_state_notify_pending(cli, NT_STATUS_NO_MEMORY);
642 static NTSTATUS cli_state_dispatch_smb1(struct cli_state *cli,
646 struct tevent_req *req;
647 struct cli_smb_state *state;
654 if ((IVAL(inbuf, 4) != 0x424d53ff) /* 0xFF"SMB" */
655 && (SVAL(inbuf, 4) != 0x45ff)) /* 0xFF"E" */ {
656 DEBUG(10, ("Got non-SMB PDU\n"));
657 return NT_STATUS_INVALID_NETWORK_RESPONSE;
660 if (cli_encryption_on(cli) && (CVAL(inbuf, 0) == 0)) {
661 uint16_t enc_ctx_num;
663 status = get_enc_ctx_num(inbuf, &enc_ctx_num);
664 if (!NT_STATUS_IS_OK(status)) {
665 DEBUG(10, ("get_enc_ctx_num returned %s\n",
670 if (enc_ctx_num != cli->trans_enc_state->enc_ctx_num) {
671 DEBUG(10, ("wrong enc_ctx %d, expected %d\n",
673 cli->trans_enc_state->enc_ctx_num));
674 return NT_STATUS_INVALID_HANDLE;
677 status = common_decrypt_buffer(cli->trans_enc_state,
679 if (!NT_STATUS_IS_OK(status)) {
680 DEBUG(10, ("common_decrypt_buffer returned %s\n",
686 mid = SVAL(inbuf, smb_mid);
687 num_pending = talloc_array_length(cli->conn.pending);
689 for (i=0; i<num_pending; i++) {
690 if (mid == cli_smb_req_mid(cli->conn.pending[i])) {
694 if (i == num_pending) {
695 /* Dump unexpected reply */
696 return NT_STATUS_RETRY;
699 oplock_break = false;
703 * Paranoia checks that this is really an oplock break request.
705 oplock_break = (smb_len(inbuf) == 51); /* hdr + 8 words */
706 oplock_break &= ((CVAL(inbuf, smb_flg) & FLAG_REPLY) == 0);
707 oplock_break &= (CVAL(inbuf, smb_com) == SMBlockingX);
708 oplock_break &= (SVAL(inbuf, smb_vwv6) == 0);
709 oplock_break &= (SVAL(inbuf, smb_vwv7) == 0);
712 /* Dump unexpected reply */
713 return NT_STATUS_RETRY;
717 req = cli->conn.pending[i];
718 state = tevent_req_data(req, struct cli_smb_state);
720 if (!oplock_break /* oplock breaks are not signed */
721 && !cli_check_sign_mac(cli, (char *)inbuf, state->seqnum+1)) {
722 DEBUG(10, ("cli_check_sign_mac failed\n"));
723 return NT_STATUS_ACCESS_DENIED;
726 if (state->chained_requests != NULL) {
727 struct tevent_req **chain = talloc_move(frame,
728 &state->chained_requests);
729 int num_chained = talloc_array_length(chain);
732 * We steal the inbuf to the chain,
733 * so that it will stay until all
734 * requests of the chain are finished.
736 * Each requests in the chain will
737 * hold a talloc reference to the chain.
738 * This way we do not expose the talloc_reference()
739 * behavior to the callers.
741 talloc_steal(chain, inbuf);
743 for (i=0; i<num_chained; i++) {
744 struct tevent_req **ref;
747 state = tevent_req_data(req, struct cli_smb_state);
749 cli_smb_req_unset_pending(req);
752 * as we finish multiple requests here
753 * we need to defer the callbacks as
754 * they could destroy our current stack state.
756 tevent_req_defer_callback(req, state->ev);
758 ref = talloc_reference(state, chain);
759 if (tevent_req_nomem(ref, req)) {
763 state->inbuf = inbuf;
764 state->chain_num = i;
765 state->chain_length = num_chained;
767 tevent_req_done(req);
770 return NT_STATUS_RETRY;
773 cli_smb_req_unset_pending(req);
775 state->inbuf = talloc_move(state, &inbuf);
776 state->chain_num = 0;
777 state->chain_length = 1;
779 if (talloc_array_length(cli->conn.pending) == 0) {
780 tevent_req_done(req);
784 tevent_req_defer_callback(req, state->ev);
785 tevent_req_done(req);
786 return NT_STATUS_RETRY;
789 NTSTATUS cli_smb_recv(struct tevent_req *req,
790 TALLOC_CTX *mem_ctx, uint8_t **pinbuf,
791 uint8_t min_wct, uint8_t *pwct, uint16_t **pvwv,
792 uint32_t *pnum_bytes, uint8_t **pbytes)
794 struct cli_smb_state *state = tevent_req_data(
795 req, struct cli_smb_state);
796 NTSTATUS status = NT_STATUS_OK;
799 size_t wct_ofs, bytes_offset;
802 if (tevent_req_is_nterror(req, &status)) {
806 if (state->inbuf == NULL) {
808 return NT_STATUS_INVALID_NETWORK_RESPONSE;
825 /* This was a request without a reply */
830 cmd = CVAL(state->inbuf, smb_com);
832 for (i=0; i<state->chain_num; i++) {
833 if (i < state->chain_num-1) {
835 return NT_STATUS_REQUEST_ABORTED;
837 if (!is_andx_req(cmd)) {
838 return NT_STATUS_INVALID_NETWORK_RESPONSE;
842 if (!have_andx_command((char *)state->inbuf, wct_ofs)) {
844 * This request was not completed because a previous
845 * request in the chain had received an error.
847 return NT_STATUS_REQUEST_ABORTED;
850 wct_ofs = SVAL(state->inbuf, wct_ofs + 3);
853 * Skip the all-present length field. No overflow, we've just
854 * put a 16-bit value into a size_t.
858 if (wct_ofs+2 > talloc_get_size(state->inbuf)) {
859 return NT_STATUS_INVALID_NETWORK_RESPONSE;
862 cmd = CVAL(state->inbuf, wct_ofs + 1);
865 state->cli->raw_status = cli_pull_raw_error(state->inbuf);
866 if (NT_STATUS_IS_DOS(state->cli->raw_status)) {
867 uint8_t eclass = NT_STATUS_DOS_CLASS(state->cli->raw_status);
868 uint16_t ecode = NT_STATUS_DOS_CODE(state->cli->raw_status);
870 * TODO: is it really a good idea to do a mapping here?
872 * The old cli_pull_error() also does it, so I do not change
875 status = dos_to_ntstatus(eclass, ecode);
877 status = state->cli->raw_status;
880 if (!have_andx_command((char *)state->inbuf, wct_ofs)) {
882 if ((cmd == SMBsesssetupX)
884 status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
886 * NT_STATUS_MORE_PROCESSING_REQUIRED is a
887 * valid return code for session setup
892 if (NT_STATUS_IS_ERR(status)) {
894 * The last command takes the error code. All
895 * further commands down the requested chain
896 * will get a NT_STATUS_REQUEST_ABORTED.
904 wct = CVAL(state->inbuf, wct_ofs);
905 bytes_offset = wct_ofs + 1 + wct * sizeof(uint16_t);
906 num_bytes = SVAL(state->inbuf, bytes_offset);
909 return NT_STATUS_INVALID_NETWORK_RESPONSE;
913 * wct_ofs is a 16-bit value plus 4, wct is a 8-bit value, num_bytes
914 * is a 16-bit value. So bytes_offset being size_t should be far from
917 if ((bytes_offset + 2 > talloc_get_size(state->inbuf))
918 || (bytes_offset > 0xffff)) {
919 return NT_STATUS_INVALID_NETWORK_RESPONSE;
926 *pvwv = (uint16_t *)(state->inbuf + wct_ofs + 1);
928 if (pnum_bytes != NULL) {
929 *pnum_bytes = num_bytes;
931 if (pbytes != NULL) {
932 *pbytes = (uint8_t *)state->inbuf + bytes_offset + 2;
934 if ((mem_ctx != NULL) && (pinbuf != NULL)) {
935 if (state->chain_num == state->chain_length-1) {
936 *pinbuf = talloc_move(mem_ctx, &state->inbuf);
938 *pinbuf = state->inbuf;
945 size_t cli_smb_wct_ofs(struct tevent_req **reqs, int num_reqs)
950 wct_ofs = smb_wct - 4;
952 for (i=0; i<num_reqs; i++) {
953 struct cli_smb_state *state;
954 state = tevent_req_data(reqs[i], struct cli_smb_state);
955 wct_ofs += iov_len(state->iov+1, state->iov_count-1);
956 wct_ofs = (wct_ofs + 3) & ~3;
961 NTSTATUS cli_smb_chain_send(struct tevent_req **reqs, int num_reqs)
963 struct cli_smb_state *first_state = tevent_req_data(
964 reqs[0], struct cli_smb_state);
965 struct cli_smb_state *last_state = tevent_req_data(
966 reqs[num_reqs-1], struct cli_smb_state);
967 struct cli_smb_state *state;
969 size_t chain_padding = 0;
971 struct iovec *iov = NULL;
972 struct iovec *this_iov;
976 for (i=0; i<num_reqs; i++) {
977 state = tevent_req_data(reqs[i], struct cli_smb_state);
978 iovlen += state->iov_count;
981 iov = talloc_array(last_state, struct iovec, iovlen);
983 return NT_STATUS_NO_MEMORY;
986 first_state->chained_requests = (struct tevent_req **)talloc_memdup(
987 last_state, reqs, sizeof(*reqs) * num_reqs);
988 if (first_state->chained_requests == NULL) {
990 return NT_STATUS_NO_MEMORY;
993 wct_offset = smb_wct - 4;
996 for (i=0; i<num_reqs; i++) {
997 size_t next_padding = 0;
1000 state = tevent_req_data(reqs[i], struct cli_smb_state);
1002 if (i < num_reqs-1) {
1003 if (!is_andx_req(CVAL(state->header, smb_com))
1004 || CVAL(state->header, smb_wct) < 2) {
1006 TALLOC_FREE(first_state->chained_requests);
1007 return NT_STATUS_INVALID_PARAMETER;
1011 wct_offset += iov_len(state->iov+1, state->iov_count-1) + 1;
1012 if ((wct_offset % 4) != 0) {
1013 next_padding = 4 - (wct_offset % 4);
1015 wct_offset += next_padding;
1018 if (i < num_reqs-1) {
1019 struct cli_smb_state *next_state = tevent_req_data(
1020 reqs[i+1], struct cli_smb_state);
1021 SCVAL(vwv+0, 0, CVAL(next_state->header, smb_com));
1023 SSVAL(vwv+1, 0, wct_offset);
1024 } else if (is_andx_req(CVAL(state->header, smb_com))) {
1025 /* properly end the chain */
1026 SCVAL(vwv+0, 0, 0xff);
1027 SCVAL(vwv+0, 1, 0xff);
1032 this_iov[0] = state->iov[0];
1035 * This one is a bit subtle. We have to add
1036 * chain_padding bytes between the requests, and we
1037 * have to also include the wct field of the
1038 * subsequent requests. We use the subsequent header
1039 * for the padding, it contains the wct field in its
1042 this_iov[0].iov_len = chain_padding+1;
1043 this_iov[0].iov_base = (void *)&state->header[
1044 sizeof(state->header) - this_iov[0].iov_len];
1045 memset(this_iov[0].iov_base, 0, this_iov[0].iov_len-1);
1047 memcpy(this_iov+1, state->iov+1,
1048 sizeof(struct iovec) * (state->iov_count-1));
1049 this_iov += state->iov_count;
1050 chain_padding = next_padding;
1053 status = cli_smb_req_iov_send(reqs[0], last_state, iov, iovlen);
1054 if (!NT_STATUS_IS_OK(status)) {
1056 TALLOC_FREE(first_state->chained_requests);
1060 return NT_STATUS_OK;
1063 bool cli_has_async_calls(struct cli_state *cli)
1065 return ((tevent_queue_length(cli->conn.outgoing) != 0)
1066 || (talloc_array_length(cli->conn.pending) != 0));
1069 struct cli_smb_oplock_break_waiter_state {
1074 static void cli_smb_oplock_break_waiter_done(struct tevent_req *subreq);
1076 struct tevent_req *cli_smb_oplock_break_waiter_send(TALLOC_CTX *mem_ctx,
1077 struct event_context *ev,
1078 struct cli_state *cli)
1080 struct tevent_req *req, *subreq;
1081 struct cli_smb_oplock_break_waiter_state *state;
1082 struct cli_smb_state *smb_state;
1084 req = tevent_req_create(mem_ctx, &state,
1085 struct cli_smb_oplock_break_waiter_state);
1091 * Create a fake SMB request that we will never send out. This is only
1092 * used to be set into the pending queue with the right mid.
1094 subreq = cli_smb_req_create(mem_ctx, ev, cli, 0, 0, 0, NULL, 0, NULL);
1095 if (tevent_req_nomem(subreq, req)) {
1096 return tevent_req_post(req, ev);
1098 smb_state = tevent_req_data(subreq, struct cli_smb_state);
1099 SSVAL(smb_state->header, smb_mid, 0xffff);
1101 if (!cli_smb_req_set_pending(subreq)) {
1102 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
1103 return tevent_req_post(req, ev);
1105 tevent_req_set_callback(subreq, cli_smb_oplock_break_waiter_done, req);
1109 static void cli_smb_oplock_break_waiter_done(struct tevent_req *subreq)
1111 struct tevent_req *req = tevent_req_callback_data(
1112 subreq, struct tevent_req);
1113 struct cli_smb_oplock_break_waiter_state *state = tevent_req_data(
1114 req, struct cli_smb_oplock_break_waiter_state);
1122 status = cli_smb_recv(subreq, state, &inbuf, 8, &wct, &vwv,
1123 &num_bytes, &bytes);
1124 TALLOC_FREE(subreq);
1125 if (!NT_STATUS_IS_OK(status)) {
1126 tevent_req_nterror(req, status);
1129 state->fnum = SVAL(vwv+2, 0);
1130 state->level = CVAL(vwv+3, 1);
1131 tevent_req_done(req);
1134 NTSTATUS cli_smb_oplock_break_waiter_recv(struct tevent_req *req,
1138 struct cli_smb_oplock_break_waiter_state *state = tevent_req_data(
1139 req, struct cli_smb_oplock_break_waiter_state);
1142 if (tevent_req_is_nterror(req, &status)) {
1145 *pfnum = state->fnum;
1146 *plevel = state->level;
1147 return NT_STATUS_OK;
1151 struct cli_session_request_state {
1152 struct tevent_context *ev;
1155 struct iovec iov[3];
1156 uint8_t nb_session_response;
1159 static void cli_session_request_sent(struct tevent_req *subreq);
1160 static void cli_session_request_recvd(struct tevent_req *subreq);
1162 struct tevent_req *cli_session_request_send(TALLOC_CTX *mem_ctx,
1163 struct tevent_context *ev,
1165 const struct nmb_name *called,
1166 const struct nmb_name *calling)
1168 struct tevent_req *req, *subreq;
1169 struct cli_session_request_state *state;
1171 req = tevent_req_create(mem_ctx, &state,
1172 struct cli_session_request_state);
1179 state->iov[1].iov_base = name_mangle(
1180 state, called->name, called->name_type);
1181 if (tevent_req_nomem(state->iov[1].iov_base, req)) {
1182 return tevent_req_post(req, ev);
1184 state->iov[1].iov_len = name_len(
1185 (unsigned char *)state->iov[1].iov_base,
1186 talloc_get_size(state->iov[1].iov_base));
1188 state->iov[2].iov_base = name_mangle(
1189 state, calling->name, calling->name_type);
1190 if (tevent_req_nomem(state->iov[2].iov_base, req)) {
1191 return tevent_req_post(req, ev);
1193 state->iov[2].iov_len = name_len(
1194 (unsigned char *)state->iov[2].iov_base,
1195 talloc_get_size(state->iov[2].iov_base));
1197 _smb_setlen(((char *)&state->len_hdr),
1198 state->iov[1].iov_len + state->iov[2].iov_len);
1199 SCVAL((char *)&state->len_hdr, 0, 0x81);
1201 state->iov[0].iov_base = &state->len_hdr;
1202 state->iov[0].iov_len = sizeof(state->len_hdr);
1204 subreq = writev_send(state, ev, NULL, sock, true, state->iov, 3);
1205 if (tevent_req_nomem(subreq, req)) {
1206 return tevent_req_post(req, ev);
1208 tevent_req_set_callback(subreq, cli_session_request_sent, req);
1212 static void cli_session_request_sent(struct tevent_req *subreq)
1214 struct tevent_req *req = tevent_req_callback_data(
1215 subreq, struct tevent_req);
1216 struct cli_session_request_state *state = tevent_req_data(
1217 req, struct cli_session_request_state);
1221 ret = writev_recv(subreq, &err);
1222 TALLOC_FREE(subreq);
1224 tevent_req_error(req, err);
1227 subreq = read_smb_send(state, state->ev, state->sock);
1228 if (tevent_req_nomem(subreq, req)) {
1231 tevent_req_set_callback(subreq, cli_session_request_recvd, req);
1234 static void cli_session_request_recvd(struct tevent_req *subreq)
1236 struct tevent_req *req = tevent_req_callback_data(
1237 subreq, struct tevent_req);
1238 struct cli_session_request_state *state = tevent_req_data(
1239 req, struct cli_session_request_state);
1244 ret = read_smb_recv(subreq, talloc_tos(), &buf, &err);
1245 TALLOC_FREE(subreq);
1252 tevent_req_error(req, err);
1256 * In case of an error there is more information in the data
1257 * portion according to RFC1002. We're not subtle enough to
1258 * respond to the different error conditions, so drop the
1261 state->nb_session_response = CVAL(buf, 0);
1262 tevent_req_done(req);
1265 bool cli_session_request_recv(struct tevent_req *req, int *err, uint8_t *resp)
1267 struct cli_session_request_state *state = tevent_req_data(
1268 req, struct cli_session_request_state);
1270 if (tevent_req_is_unix_error(req, err)) {
1273 *resp = state->nb_session_response;