| 1 | /*
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| 2 | Unix SMB/CIFS implementation.
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| 3 |
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| 4 | SMB2 client notify calls
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| 5 |
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| 6 | Copyright (C) Stefan Metzmacher 2006
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| 7 |
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| 8 | This program is free software; you can redistribute it and/or modify
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| 9 | it under the terms of the GNU General Public License as published by
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| 10 | the Free Software Foundation; either version 3 of the License, or
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| 11 | (at your option) any later version.
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| 12 |
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| 13 | This program is distributed in the hope that it will be useful,
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| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 16 | GNU General Public License for more details.
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| 17 |
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| 18 | You should have received a copy of the GNU General Public License
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| 19 | along with this program. If not, see <http://www.gnu.org/licenses/>.
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| 20 | */
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| 21 |
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| 22 | #include "includes.h"
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| 23 | #include "libcli/raw/libcliraw.h"
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| 24 | #include "libcli/smb2/smb2.h"
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| 25 | #include "libcli/smb2/smb2_calls.h"
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| 26 |
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| 27 | /*
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| 28 | send a cancel request
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| 29 | */
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| 30 | NTSTATUS smb2_cancel(struct smb2_request *r)
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| 31 | {
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| 32 | NTSTATUS status;
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| 33 | struct smb2_request *c;
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| 34 | uint32_t old_timeout;
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| 35 | uint64_t old_seqnum;
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| 36 |
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| 37 | /*
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| 38 | * if we don't get a pending id yet, we just
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| 39 | * mark the request for pending, so that we directly
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| 40 | * send the cancel after getting the pending id
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| 41 | */
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| 42 | if (!r->cancel.can_cancel) {
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| 43 | r->cancel.do_cancel++;
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| 44 | return NT_STATUS_OK;
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| 45 | }
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| 46 |
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| 47 | /* we don't want a seqmun for a SMB2 Cancel */
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| 48 | old_seqnum = r->transport->seqnum;
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| 49 | c = smb2_request_init(r->transport, SMB2_OP_CANCEL, 0x04, false, 0);
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| 50 | r->transport->seqnum = old_seqnum;
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| 51 | NT_STATUS_HAVE_NO_MEMORY(c);
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| 52 | c->seqnum = 0;
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| 53 |
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| 54 | SIVAL(c->out.hdr, SMB2_HDR_FLAGS, 0x00000002);
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| 55 | SSVAL(c->out.hdr, SMB2_HDR_CREDIT, 0x0030);
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| 56 | SIVAL(c->out.hdr, SMB2_HDR_PID, r->cancel.pending_id);
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| 57 | SBVAL(c->out.hdr, SMB2_HDR_MESSAGE_ID, c->seqnum);
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| 58 | if (r->session) {
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| 59 | SBVAL(c->out.hdr, SMB2_HDR_SESSION_ID, r->session->uid);
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| 60 | }
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| 61 |
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| 62 | SSVAL(c->out.body, 0x02, 0);
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| 63 |
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| 64 | old_timeout = c->transport->options.request_timeout;
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| 65 | c->transport->options.request_timeout = 0;
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| 66 | smb2_transport_send(c);
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| 67 | c->transport->options.request_timeout = old_timeout;
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| 68 |
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| 69 | if (c->state == SMB2_REQUEST_ERROR) {
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| 70 | status = c->status;
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| 71 | } else {
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| 72 | status = NT_STATUS_OK;
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| 73 | }
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| 74 |
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| 75 | talloc_free(c);
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| 76 | return status;
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| 77 | }
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