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 "../lib/async_req/async_sock.h"
22 #include "async_smb.h"
23 #include "smb_crypt.h"
26 * Read an smb packet asynchronously, discard keepalives
29 struct read_smb_state {
30 struct tevent_context *ev;
35 static ssize_t read_smb_more(uint8_t *buf, size_t buflen, void *private_data);
36 static void read_smb_done(struct tevent_req *subreq);
38 static struct tevent_req *read_smb_send(TALLOC_CTX *mem_ctx,
39 struct tevent_context *ev,
42 struct tevent_req *result, *subreq;
43 struct read_smb_state *state;
45 result = tevent_req_create(mem_ctx, &state, struct read_smb_state);
52 subreq = read_packet_send(state, ev, fd, 4, read_smb_more, NULL);
56 tevent_req_set_callback(subreq, read_smb_done, result);
63 static ssize_t read_smb_more(uint8_t *buf, size_t buflen, void *private_data)
66 return 0; /* We've been here, we're done */
68 return smb_len_large(buf);
71 static void read_smb_done(struct tevent_req *subreq)
73 struct tevent_req *req = tevent_req_callback_data(
74 subreq, struct tevent_req);
75 struct read_smb_state *state = tevent_req_data(
76 req, struct read_smb_state);
80 len = read_packet_recv(subreq, state, &state->buf, &err);
83 tevent_req_error(req, err);
87 if (CVAL(state->buf, 0) == SMBkeepalive) {
88 subreq = read_packet_send(state, state->ev, state->fd, 4,
90 if (tevent_req_nomem(subreq, req)) {
93 tevent_req_set_callback(subreq, read_smb_done, req);
99 static ssize_t read_smb_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
100 uint8_t **pbuf, int *perrno)
102 struct read_smb_state *state = tevent_req_data(
103 req, struct read_smb_state);
105 if (tevent_req_is_unix_error(req, perrno)) {
108 *pbuf = talloc_move(mem_ctx, &state->buf);
109 return talloc_get_size(*pbuf);
113 * Fetch an error out of a NBT packet
114 * @param[in] buf The SMB packet
115 * @retval The error, converted to NTSTATUS
118 NTSTATUS cli_pull_error(char *buf)
120 uint32_t flags2 = SVAL(buf, smb_flg2);
122 if (flags2 & FLAGS2_32_BIT_ERROR_CODES) {
123 return NT_STATUS(IVAL(buf, smb_rcls));
126 return dos_to_ntstatus(CVAL(buf, smb_rcls), SVAL(buf,smb_err));
130 * Compatibility helper for the sync APIs: Fake NTSTATUS in cli->inbuf
131 * @param[in] cli The client connection that just received an error
132 * @param[in] status The error to set on "cli"
135 void cli_set_error(struct cli_state *cli, NTSTATUS status)
137 uint32_t flags2 = SVAL(cli->inbuf, smb_flg2);
139 if (NT_STATUS_IS_DOS(status)) {
140 SSVAL(cli->inbuf, smb_flg2,
141 flags2 & ~FLAGS2_32_BIT_ERROR_CODES);
142 SCVAL(cli->inbuf, smb_rcls, NT_STATUS_DOS_CLASS(status));
143 SSVAL(cli->inbuf, smb_err, NT_STATUS_DOS_CODE(status));
147 SSVAL(cli->inbuf, smb_flg2, flags2 | FLAGS2_32_BIT_ERROR_CODES);
148 SIVAL(cli->inbuf, smb_rcls, NT_STATUS_V(status));
153 * Figure out if there is an andx command behind the current one
154 * @param[in] buf The smb buffer to look at
155 * @param[in] ofs The offset to the wct field that is followed by the cmd
156 * @retval Is there a command following?
159 static bool have_andx_command(const char *buf, uint16_t ofs)
162 size_t buflen = talloc_get_size(buf);
164 if ((ofs == buflen-1) || (ofs == buflen)) {
168 wct = CVAL(buf, ofs);
171 * Not enough space for the command and a following pointer
175 return (CVAL(buf, ofs+1) != 0xff);
178 #define MAX_SMB_IOV 5
180 struct cli_smb_state {
181 struct tevent_context *ev;
182 struct cli_state *cli;
183 uint8_t header[smb_wct+1]; /* Space for the header including the wct */
186 * For normal requests, cli_smb_req_send chooses a mid. Secondary
187 * trans requests need to use the mid of the primary request, so we
188 * need a place to store it. Assume it's set if != 0.
193 uint8_t bytecount_buf[2];
195 struct iovec iov[MAX_SMB_IOV+3];
202 struct tevent_req **chained_requests;
205 static uint16_t cli_alloc_mid(struct cli_state *cli)
207 int num_pending = talloc_array_length(cli->pending);
214 if ((result == 0) || (result == 0xffff)) {
218 for (i=0; i<num_pending; i++) {
219 if (result == cli_smb_req_mid(cli->pending[i])) {
224 if (i == num_pending) {
230 void cli_smb_req_unset_pending(struct tevent_req *req)
232 struct cli_smb_state *state = tevent_req_data(
233 req, struct cli_smb_state);
234 struct cli_state *cli = state->cli;
235 int num_pending = talloc_array_length(cli->pending);
238 if (num_pending == 1) {
240 * The pending read_smb tevent_req is a child of
241 * cli->pending. So if nothing is pending anymore, we need to
242 * delete the socket read fde.
244 TALLOC_FREE(cli->pending);
248 for (i=0; i<num_pending; i++) {
249 if (req == cli->pending[i]) {
253 if (i == num_pending) {
255 * Something's seriously broken. Just returning here is the
256 * right thing nevertheless, the point of this routine is to
257 * remove ourselves from cli->pending.
263 * Remove ourselves from the cli->pending array
265 if (num_pending > 1) {
266 cli->pending[i] = cli->pending[num_pending-1];
270 * No NULL check here, we're shrinking by sizeof(void *), and
271 * talloc_realloc just adjusts the size for this.
273 cli->pending = talloc_realloc(NULL, cli->pending, struct tevent_req *,
278 static int cli_smb_req_destructor(struct tevent_req *req)
280 cli_smb_req_unset_pending(req);
284 static void cli_smb_received(struct tevent_req *subreq);
286 bool cli_smb_req_set_pending(struct tevent_req *req)
288 struct cli_smb_state *state = tevent_req_data(
289 req, struct cli_smb_state);
290 struct cli_state *cli;
291 struct tevent_req **pending;
293 struct tevent_req *subreq;
296 num_pending = talloc_array_length(cli->pending);
298 pending = talloc_realloc(cli, cli->pending, struct tevent_req *,
300 if (pending == NULL) {
303 pending[num_pending] = req;
304 cli->pending = pending;
305 talloc_set_destructor(req, cli_smb_req_destructor);
307 if (num_pending > 0) {
312 * We're the first ones, add the read_smb request that waits for the
313 * answer from the server
315 subreq = read_smb_send(cli->pending, state->ev, cli->fd);
316 if (subreq == NULL) {
317 cli_smb_req_unset_pending(req);
320 tevent_req_set_callback(subreq, cli_smb_received, cli);
325 * Fetch a smb request's mid. Only valid after the request has been sent by
326 * cli_smb_req_send().
328 uint16_t cli_smb_req_mid(struct tevent_req *req)
330 struct cli_smb_state *state = tevent_req_data(
331 req, struct cli_smb_state);
332 return SVAL(state->header, smb_mid);
335 void cli_smb_req_set_mid(struct tevent_req *req, uint16_t mid)
337 struct cli_smb_state *state = tevent_req_data(
338 req, struct cli_smb_state);
342 static size_t iov_len(const struct iovec *iov, int count)
346 for (i=0; i<count; i++) {
347 result += iov[i].iov_len;
352 static uint8_t *iov_concat(TALLOC_CTX *mem_ctx, const struct iovec *iov,
355 size_t len = iov_len(iov, count);
360 buf = talloc_array(mem_ctx, uint8_t, len);
365 for (i=0; i<count; i++) {
366 memcpy(buf+copied, iov[i].iov_base, iov[i].iov_len);
367 copied += iov[i].iov_len;
372 struct tevent_req *cli_smb_req_create(TALLOC_CTX *mem_ctx,
373 struct event_context *ev,
374 struct cli_state *cli,
376 uint8_t additional_flags,
377 uint8_t wct, uint16_t *vwv,
379 struct iovec *bytes_iov)
381 struct tevent_req *result;
382 struct cli_smb_state *state;
383 struct timeval endtime;
385 if (iov_count > MAX_SMB_IOV) {
387 * Should not happen :-)
392 result = tevent_req_create(mem_ctx, &state, struct cli_smb_state);
393 if (result == NULL) {
398 state->mid = 0; /* Set to auto-choose in cli_smb_req_send */
399 state->chain_num = 0;
400 state->chained_requests = NULL;
402 cli_setup_packet_buf(cli, (char *)state->header);
403 SCVAL(state->header, smb_com, smb_command);
404 SSVAL(state->header, smb_tid, cli->cnum);
405 SCVAL(state->header, smb_wct, wct);
409 SSVAL(state->bytecount_buf, 0, iov_len(bytes_iov, iov_count));
411 state->iov[0].iov_base = (void *)state->header;
412 state->iov[0].iov_len = sizeof(state->header);
413 state->iov[1].iov_base = (void *)state->vwv;
414 state->iov[1].iov_len = wct * sizeof(uint16_t);
415 state->iov[2].iov_base = (void *)state->bytecount_buf;
416 state->iov[2].iov_len = sizeof(uint16_t);
418 if (iov_count != 0) {
419 memcpy(&state->iov[3], bytes_iov,
420 iov_count * sizeof(*bytes_iov));
422 state->iov_count = iov_count + 3;
425 endtime = timeval_current_ofs(0, cli->timeout * 1000);
426 if (!tevent_req_set_endtime(result, ev, endtime)) {
427 tevent_req_nomem(NULL, result);
433 static NTSTATUS cli_signv(struct cli_state *cli, struct iovec *iov, int count,
439 * Obvious optimization: Make cli_calculate_sign_mac work with struct
440 * iovec directly. MD5Update would do that just fine.
443 if ((count <= 0) || (iov[0].iov_len < smb_wct)) {
444 return NT_STATUS_INVALID_PARAMETER;
447 buf = iov_concat(talloc_tos(), iov, count);
449 return NT_STATUS_NO_MEMORY;
452 cli_calculate_sign_mac(cli, (char *)buf, seqnum);
453 memcpy(iov[0].iov_base, buf, iov[0].iov_len);
459 static void cli_smb_sent(struct tevent_req *subreq);
461 static NTSTATUS cli_smb_req_iov_send(struct tevent_req *req,
462 struct cli_smb_state *state,
463 struct iovec *iov, int iov_count)
465 struct tevent_req *subreq;
468 if (state->cli->fd == -1) {
469 return NT_STATUS_CONNECTION_INVALID;
472 if (iov[0].iov_len < smb_wct) {
473 return NT_STATUS_INVALID_PARAMETER;
476 if (state->mid != 0) {
477 SSVAL(iov[0].iov_base, smb_mid, state->mid);
479 uint16_t mid = cli_alloc_mid(state->cli);
480 SSVAL(iov[0].iov_base, smb_mid, mid);
483 smb_setlen((char *)iov[0].iov_base, iov_len(iov, iov_count) - 4);
485 status = cli_signv(state->cli, iov, iov_count, &state->seqnum);
487 if (!NT_STATUS_IS_OK(status)) {
491 if (cli_encryption_on(state->cli)) {
494 buf = (char *)iov_concat(talloc_tos(), iov, iov_count);
496 return NT_STATUS_NO_MEMORY;
498 status = cli_encrypt_message(state->cli, (char *)buf,
501 if (!NT_STATUS_IS_OK(status)) {
502 DEBUG(0, ("Error in encrypting client message: %s\n",
506 buf = (char *)talloc_memdup(state, enc_buf,
510 return NT_STATUS_NO_MEMORY;
512 iov[0].iov_base = (void *)buf;
513 iov[0].iov_len = talloc_get_size(buf);
516 subreq = writev_send(state, state->ev, state->cli->outgoing,
517 state->cli->fd, false, iov, iov_count);
518 if (subreq == NULL) {
519 return NT_STATUS_NO_MEMORY;
521 tevent_req_set_callback(subreq, cli_smb_sent, req);
525 NTSTATUS cli_smb_req_send(struct tevent_req *req)
527 struct cli_smb_state *state = tevent_req_data(
528 req, struct cli_smb_state);
530 return cli_smb_req_iov_send(req, state, state->iov, state->iov_count);
533 struct tevent_req *cli_smb_send(TALLOC_CTX *mem_ctx,
534 struct event_context *ev,
535 struct cli_state *cli,
537 uint8_t additional_flags,
538 uint8_t wct, uint16_t *vwv,
540 const uint8_t *bytes)
542 struct tevent_req *req;
546 iov.iov_base = CONST_DISCARD(void *, bytes);
547 iov.iov_len = num_bytes;
549 req = cli_smb_req_create(mem_ctx, ev, cli, smb_command,
550 additional_flags, wct, vwv, 1, &iov);
555 status = cli_smb_req_send(req);
556 if (!NT_STATUS_IS_OK(status)) {
557 tevent_req_nterror(req, status);
558 return tevent_req_post(req, ev);
563 static void cli_smb_sent(struct tevent_req *subreq)
565 struct tevent_req *req = tevent_req_callback_data(
566 subreq, struct tevent_req);
567 struct cli_smb_state *state = tevent_req_data(
568 req, struct cli_smb_state);
572 nwritten = writev_recv(subreq, &err);
574 if (nwritten == -1) {
575 if (state->cli->fd != -1) {
576 close(state->cli->fd);
579 tevent_req_nterror(req, map_nt_error_from_unix(err));
583 switch (CVAL(state->header, smb_com)) {
589 tevent_req_done(req);
592 if ((CVAL(state->header, smb_wct) == 8) &&
593 (CVAL(state->vwv+3, 0) == LOCKING_ANDX_OPLOCK_RELEASE)) {
595 tevent_req_done(req);
600 if (!cli_smb_req_set_pending(req)) {
601 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
606 static void cli_smb_received(struct tevent_req *subreq)
608 struct cli_state *cli = tevent_req_callback_data(
609 subreq, struct cli_state);
610 struct tevent_req *req;
611 struct cli_smb_state *state;
620 received = read_smb_recv(subreq, talloc_tos(), &inbuf, &err);
622 if (received == -1) {
627 status = map_nt_error_from_unix(err);
631 if ((IVAL(inbuf, 4) != 0x424d53ff) /* 0xFF"SMB" */
632 && (SVAL(inbuf, 4) != 0x45ff)) /* 0xFF"E" */ {
633 DEBUG(10, ("Got non-SMB PDU\n"));
634 status = NT_STATUS_INVALID_NETWORK_RESPONSE;
638 if (cli_encryption_on(cli) && (CVAL(inbuf, 0) == 0)) {
639 uint16_t enc_ctx_num;
641 status = get_enc_ctx_num(inbuf, &enc_ctx_num);
642 if (!NT_STATUS_IS_OK(status)) {
643 DEBUG(10, ("get_enc_ctx_num returned %s\n",
648 if (enc_ctx_num != cli->trans_enc_state->enc_ctx_num) {
649 DEBUG(10, ("wrong enc_ctx %d, expected %d\n",
651 cli->trans_enc_state->enc_ctx_num));
652 status = NT_STATUS_INVALID_HANDLE;
656 status = common_decrypt_buffer(cli->trans_enc_state,
658 if (!NT_STATUS_IS_OK(status)) {
659 DEBUG(10, ("common_decrypt_buffer returned %s\n",
665 mid = SVAL(inbuf, smb_mid);
666 num_pending = talloc_array_length(cli->pending);
668 for (i=0; i<num_pending; i++) {
669 if (mid == cli_smb_req_mid(cli->pending[i])) {
673 if (i == num_pending) {
674 /* Dump unexpected reply */
679 oplock_break = false;
683 * Paranoia checks that this is really an oplock break request.
685 oplock_break = (smb_len(inbuf) == 51); /* hdr + 8 words */
686 oplock_break &= ((CVAL(inbuf, smb_flg) & FLAG_REPLY) == 0);
687 oplock_break &= (CVAL(inbuf, smb_com) == SMBlockingX);
688 oplock_break &= (SVAL(inbuf, smb_vwv6) == 0);
689 oplock_break &= (SVAL(inbuf, smb_vwv7) == 0);
692 /* Dump unexpected reply */
698 req = cli->pending[i];
699 state = tevent_req_data(req, struct cli_smb_state);
701 if (!oplock_break /* oplock breaks are not signed */
702 && !cli_check_sign_mac(cli, (char *)inbuf, state->seqnum+1)) {
703 DEBUG(10, ("cli_check_sign_mac failed\n"));
705 status = NT_STATUS_ACCESS_DENIED;
711 if (state->chained_requests == NULL) {
712 state->inbuf = talloc_move(state, &inbuf);
713 talloc_set_destructor(req, NULL);
714 cli_smb_req_destructor(req);
715 state->chain_num = 0;
716 state->chain_length = 1;
717 tevent_req_done(req);
719 struct tevent_req **chain = talloc_move(
720 talloc_tos(), &state->chained_requests);
721 int num_chained = talloc_array_length(chain);
723 for (i=0; i<num_chained; i++) {
724 state = tevent_req_data(chain[i], struct
726 state->inbuf = inbuf;
727 state->chain_num = i;
728 state->chain_length = num_chained;
729 tevent_req_done(chain[i]);
735 if (talloc_array_length(cli->pending) > 0) {
737 * Set up another read request for the other pending cli_smb
740 state = tevent_req_data(cli->pending[0], struct cli_smb_state);
741 subreq = read_smb_send(cli->pending, state->ev, cli->fd);
742 if (subreq == NULL) {
743 status = NT_STATUS_NO_MEMORY;
746 tevent_req_set_callback(subreq, cli_smb_received, cli);
751 * Cancel all pending requests. We don't do a for-loop walking
752 * cli->pending because that array changes in
753 * cli_smb_req_destructor().
755 while (talloc_array_length(cli->pending) > 0) {
756 req = cli->pending[0];
757 talloc_set_destructor(req, NULL);
758 cli_smb_req_destructor(req);
759 tevent_req_nterror(req, status);
763 NTSTATUS cli_smb_recv(struct tevent_req *req,
764 TALLOC_CTX *mem_ctx, uint8_t **pinbuf,
765 uint8_t min_wct, uint8_t *pwct, uint16_t **pvwv,
766 uint32_t *pnum_bytes, uint8_t **pbytes)
768 struct cli_smb_state *state = tevent_req_data(
769 req, struct cli_smb_state);
770 NTSTATUS status = NT_STATUS_OK;
773 size_t wct_ofs, bytes_offset;
776 if (tevent_req_is_nterror(req, &status)) {
780 if (state->inbuf == NULL) {
781 /* This was a request without a reply */
786 cmd = CVAL(state->inbuf, smb_com);
788 for (i=0; i<state->chain_num; i++) {
789 if (i < state->chain_num-1) {
791 return NT_STATUS_REQUEST_ABORTED;
793 if (!is_andx_req(cmd)) {
794 return NT_STATUS_INVALID_NETWORK_RESPONSE;
798 if (!have_andx_command((char *)state->inbuf, wct_ofs)) {
800 * This request was not completed because a previous
801 * request in the chain had received an error.
803 return NT_STATUS_REQUEST_ABORTED;
806 wct_ofs = SVAL(state->inbuf, wct_ofs + 3);
809 * Skip the all-present length field. No overflow, we've just
810 * put a 16-bit value into a size_t.
814 if (wct_ofs+2 > talloc_get_size(state->inbuf)) {
815 return NT_STATUS_INVALID_NETWORK_RESPONSE;
818 cmd = CVAL(state->inbuf, wct_ofs + 1);
821 status = cli_pull_error((char *)state->inbuf);
823 if (!have_andx_command((char *)state->inbuf, wct_ofs)) {
825 if ((cmd == SMBsesssetupX)
827 status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
829 * NT_STATUS_MORE_PROCESSING_REQUIRED is a
830 * valid return code for session setup
835 if (NT_STATUS_IS_ERR(status)) {
837 * The last command takes the error code. All
838 * further commands down the requested chain
839 * will get a NT_STATUS_REQUEST_ABORTED.
847 wct = CVAL(state->inbuf, wct_ofs);
848 bytes_offset = wct_ofs + 1 + wct * sizeof(uint16_t);
849 num_bytes = SVAL(state->inbuf, bytes_offset);
852 return NT_STATUS_INVALID_NETWORK_RESPONSE;
856 * wct_ofs is a 16-bit value plus 4, wct is a 8-bit value, num_bytes
857 * is a 16-bit value. So bytes_offset being size_t should be far from
860 if ((bytes_offset + 2 > talloc_get_size(state->inbuf))
861 || (bytes_offset > 0xffff)) {
862 return NT_STATUS_INVALID_NETWORK_RESPONSE;
869 *pvwv = (uint16_t *)(state->inbuf + wct_ofs + 1);
871 if (pnum_bytes != NULL) {
872 *pnum_bytes = num_bytes;
874 if (pbytes != NULL) {
875 *pbytes = (uint8_t *)state->inbuf + bytes_offset + 2;
877 if ((mem_ctx != NULL) && (pinbuf != NULL)) {
878 if (state->chain_num == state->chain_length-1) {
879 *pinbuf = talloc_move(mem_ctx, &state->inbuf);
881 *pinbuf = state->inbuf;
888 size_t cli_smb_wct_ofs(struct tevent_req **reqs, int num_reqs)
893 wct_ofs = smb_wct - 4;
895 for (i=0; i<num_reqs; i++) {
896 struct cli_smb_state *state;
897 state = tevent_req_data(reqs[i], struct cli_smb_state);
898 wct_ofs += iov_len(state->iov+1, state->iov_count-1);
899 wct_ofs = (wct_ofs + 3) & ~3;
904 NTSTATUS cli_smb_chain_send(struct tevent_req **reqs, int num_reqs)
906 struct cli_smb_state *first_state = tevent_req_data(
907 reqs[0], struct cli_smb_state);
908 struct cli_smb_state *last_state = tevent_req_data(
909 reqs[num_reqs-1], struct cli_smb_state);
910 struct cli_smb_state *state;
912 size_t chain_padding = 0;
914 struct iovec *iov = NULL;
915 struct iovec *this_iov;
919 for (i=0; i<num_reqs; i++) {
920 state = tevent_req_data(reqs[i], struct cli_smb_state);
921 iovlen += state->iov_count;
924 iov = talloc_array(last_state, struct iovec, iovlen);
926 return NT_STATUS_NO_MEMORY;
929 first_state->chained_requests = (struct tevent_req **)talloc_memdup(
930 last_state, reqs, sizeof(*reqs) * num_reqs);
931 if (first_state->chained_requests == NULL) {
933 return NT_STATUS_NO_MEMORY;
936 wct_offset = smb_wct - 4;
939 for (i=0; i<num_reqs; i++) {
940 size_t next_padding = 0;
943 state = tevent_req_data(reqs[i], struct cli_smb_state);
945 if (i < num_reqs-1) {
946 if (!is_andx_req(CVAL(state->header, smb_com))
947 || CVAL(state->header, smb_wct) < 2) {
949 TALLOC_FREE(first_state->chained_requests);
950 return NT_STATUS_INVALID_PARAMETER;
954 wct_offset += iov_len(state->iov+1, state->iov_count-1) + 1;
955 if ((wct_offset % 4) != 0) {
956 next_padding = 4 - (wct_offset % 4);
958 wct_offset += next_padding;
961 if (i < num_reqs-1) {
962 struct cli_smb_state *next_state = tevent_req_data(
963 reqs[i+1], struct cli_smb_state);
964 SCVAL(vwv+0, 0, CVAL(next_state->header, smb_com));
966 SSVAL(vwv+1, 0, wct_offset);
967 } else if (is_andx_req(CVAL(state->header, smb_com))) {
968 /* properly end the chain */
969 SCVAL(vwv+0, 0, 0xff);
970 SCVAL(vwv+0, 1, 0xff);
975 this_iov[0] = state->iov[0];
978 * This one is a bit subtle. We have to add
979 * chain_padding bytes between the requests, and we
980 * have to also include the wct field of the
981 * subsequent requests. We use the subsequent header
982 * for the padding, it contains the wct field in its
985 this_iov[0].iov_len = chain_padding+1;
986 this_iov[0].iov_base = (void *)&state->header[
987 sizeof(state->header) - this_iov[0].iov_len];
988 memset(this_iov[0].iov_base, 0, this_iov[0].iov_len-1);
990 memcpy(this_iov+1, state->iov+1,
991 sizeof(struct iovec) * (state->iov_count-1));
992 this_iov += state->iov_count;
993 chain_padding = next_padding;
996 status = cli_smb_req_iov_send(reqs[0], last_state, iov, iovlen);
997 if (!NT_STATUS_IS_OK(status)) {
999 TALLOC_FREE(first_state->chained_requests);
1003 return NT_STATUS_OK;
1006 uint8_t *cli_smb_inbuf(struct tevent_req *req)
1008 struct cli_smb_state *state = tevent_req_data(
1009 req, struct cli_smb_state);
1010 return state->inbuf;
1013 bool cli_has_async_calls(struct cli_state *cli)
1015 return ((tevent_queue_length(cli->outgoing) != 0)
1016 || (talloc_array_length(cli->pending) != 0));
1019 struct cli_smb_oplock_break_waiter_state {
1024 static void cli_smb_oplock_break_waiter_done(struct tevent_req *subreq);
1026 struct tevent_req *cli_smb_oplock_break_waiter_send(TALLOC_CTX *mem_ctx,
1027 struct event_context *ev,
1028 struct cli_state *cli)
1030 struct tevent_req *req, *subreq;
1031 struct cli_smb_oplock_break_waiter_state *state;
1032 struct cli_smb_state *smb_state;
1034 req = tevent_req_create(mem_ctx, &state,
1035 struct cli_smb_oplock_break_waiter_state);
1041 * Create a fake SMB request that we will never send out. This is only
1042 * used to be set into the pending queue with the right mid.
1044 subreq = cli_smb_req_create(mem_ctx, ev, cli, 0, 0, 0, NULL, 0, NULL);
1045 if (tevent_req_nomem(subreq, req)) {
1046 return tevent_req_post(req, ev);
1048 smb_state = tevent_req_data(subreq, struct cli_smb_state);
1049 SSVAL(smb_state->header, smb_mid, 0xffff);
1051 if (!cli_smb_req_set_pending(subreq)) {
1052 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
1053 return tevent_req_post(req, ev);
1055 tevent_req_set_callback(subreq, cli_smb_oplock_break_waiter_done, req);
1059 static void cli_smb_oplock_break_waiter_done(struct tevent_req *subreq)
1061 struct tevent_req *req = tevent_req_callback_data(
1062 subreq, struct tevent_req);
1063 struct cli_smb_oplock_break_waiter_state *state = tevent_req_data(
1064 req, struct cli_smb_oplock_break_waiter_state);
1072 status = cli_smb_recv(subreq, state, &inbuf, 8, &wct, &vwv,
1073 &num_bytes, &bytes);
1074 TALLOC_FREE(subreq);
1075 if (!NT_STATUS_IS_OK(status)) {
1076 tevent_req_nterror(req, status);
1079 state->fnum = SVAL(vwv+2, 0);
1080 state->level = CVAL(vwv+3, 1);
1081 tevent_req_done(req);
1084 NTSTATUS cli_smb_oplock_break_waiter_recv(struct tevent_req *req,
1088 struct cli_smb_oplock_break_waiter_state *state = tevent_req_data(
1089 req, struct cli_smb_oplock_break_waiter_state);
1092 if (tevent_req_is_nterror(req, &status)) {
1095 *pfnum = state->fnum;
1096 *plevel = state->level;
1097 return NT_STATUS_OK;
1101 struct cli_session_request_state {
1102 struct tevent_context *ev;
1105 struct iovec iov[3];
1106 uint8_t nb_session_response;
1109 static void cli_session_request_sent(struct tevent_req *subreq);
1110 static void cli_session_request_recvd(struct tevent_req *subreq);
1112 struct tevent_req *cli_session_request_send(TALLOC_CTX *mem_ctx,
1113 struct tevent_context *ev,
1115 const struct nmb_name *called,
1116 const struct nmb_name *calling)
1118 struct tevent_req *req, *subreq;
1119 struct cli_session_request_state *state;
1121 req = tevent_req_create(mem_ctx, &state,
1122 struct cli_session_request_state);
1129 state->iov[1].iov_base = name_mangle(
1130 state, called->name, called->name_type);
1131 if (tevent_req_nomem(state->iov[1].iov_base, req)) {
1132 return tevent_req_post(req, ev);
1134 state->iov[1].iov_len = name_len(
1135 (unsigned char *)state->iov[1].iov_base,
1136 talloc_get_size(state->iov[1].iov_base));
1138 state->iov[2].iov_base = name_mangle(
1139 state, calling->name, calling->name_type);
1140 if (tevent_req_nomem(state->iov[2].iov_base, req)) {
1141 return tevent_req_post(req, ev);
1143 state->iov[2].iov_len = name_len(
1144 (unsigned char *)state->iov[2].iov_base,
1145 talloc_get_size(state->iov[2].iov_base));
1147 _smb_setlen(((char *)&state->len_hdr),
1148 state->iov[1].iov_len + state->iov[2].iov_len);
1149 SCVAL((char *)&state->len_hdr, 0, 0x81);
1151 state->iov[0].iov_base = &state->len_hdr;
1152 state->iov[0].iov_len = sizeof(state->len_hdr);
1154 subreq = writev_send(state, ev, NULL, sock, true, state->iov, 3);
1155 if (tevent_req_nomem(subreq, req)) {
1156 return tevent_req_post(req, ev);
1158 tevent_req_set_callback(subreq, cli_session_request_sent, req);
1162 static void cli_session_request_sent(struct tevent_req *subreq)
1164 struct tevent_req *req = tevent_req_callback_data(
1165 subreq, struct tevent_req);
1166 struct cli_session_request_state *state = tevent_req_data(
1167 req, struct cli_session_request_state);
1171 ret = writev_recv(subreq, &err);
1172 TALLOC_FREE(subreq);
1174 tevent_req_error(req, err);
1177 subreq = read_smb_send(state, state->ev, state->sock);
1178 if (tevent_req_nomem(subreq, req)) {
1181 tevent_req_set_callback(subreq, cli_session_request_recvd, req);
1184 static void cli_session_request_recvd(struct tevent_req *subreq)
1186 struct tevent_req *req = tevent_req_callback_data(
1187 subreq, struct tevent_req);
1188 struct cli_session_request_state *state = tevent_req_data(
1189 req, struct cli_session_request_state);
1194 ret = read_smb_recv(subreq, talloc_tos(), &buf, &err);
1195 TALLOC_FREE(subreq);
1202 tevent_req_error(req, err);
1206 * In case of an error there is more information in the data
1207 * portion according to RFC1002. We're not subtle enough to
1208 * respond to the different error conditions, so drop the
1211 state->nb_session_response = CVAL(buf, 0);
1212 tevent_req_done(req);
1215 bool cli_session_request_recv(struct tevent_req *req, int *err, uint8_t *resp)
1217 struct cli_session_request_state *state = tevent_req_data(
1218 req, struct cli_session_request_state);
1220 if (tevent_req_is_unix_error(req, err)) {
1223 *resp = state->nb_session_response;