summaryrefslogtreecommitdiff
path: root/libcli/smb/smb2_lease.c
blob: 10beacac25ac69a09dbf5550acb761ad934619c5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
/*
   Unix SMB/CIFS implementation.

   SMB2 Lease context handling

   Copyright (C) Stefan Metzmacher 2012
   Copyright (C) Volker Lendecke 2013

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "includes.h"
#include "../libcli/smb/smb_common.h"

ssize_t smb2_lease_pull(uint8_t *buf, size_t len, struct smb2_lease *lease)
{
	int version;

	switch (len) {
	case 32:
		version = 1;
		break;
	case 52:
		version = 2;
		break;
	default:
		return -1;
	}

	memcpy(&lease->lease_key, buf, 16);
	lease->lease_state = IVAL(buf, 16);
	lease->lease_flags = IVAL(buf, 20);
	lease->lease_duration = BVAL(buf, 24);

	switch (version) {
	case 1:
		memcpy(&lease->parent_lease_key, buf+32, 16);
		lease->lease_epoch = SVAL(buf, 48);
		break;
	case 2:
		ZERO_STRUCT(lease->parent_lease_key);
		lease->lease_epoch = 0;
		break;
	}

	return len;
}

bool smb2_lease_push(const struct smb2_lease *lease, uint8_t *buf, size_t len)
{
	int version;

	switch (len) {
	case 32:
		version = 1;
		break;
	case 52:
		version = 2;
		break;
	default:
		return false;
	}

	memcpy(&buf[0], &lease->lease_key, 16);
	SIVAL(buf, 16, lease->lease_state);
	SIVAL(buf, 20, lease->lease_flags);
	SBVAL(buf, 24, lease->lease_duration);

	if (version == 2) {
		memcpy(&buf[32], &lease->parent_lease_key, 16);
		SIVAL(buf, 48, lease->lease_epoch);
	}

	return true;
}