1 /*
2 * Copyright (c) 2000-2001, Boris Popov
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by Boris Popov.
16 * 4. Neither the name of the author nor the names of any co-contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * $Id: smbfs_subr.c,v 1.18 2005/02/02 00:22:23 lindak Exp $
33 */
34
35 /*
36 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
37 * Use is subject to license terms.
38 *
39 * Copyright 2018 Nexenta Systems, Inc. All rights reserved.
40 */
41
42 /*
43 * Time conversion functions (to/from DOS, NT times)
44 * From BSD/Darwin smbfs_subr.c
45 */
46
47 #include <sys/param.h>
48 #include <sys/systm.h>
49 #include <sys/time.h>
50 #include <sys/vnode.h>
51 #include <sys/sunddi.h>
52
53 #include <netsmb/smb_osdep.h>
54
55 #include <netsmb/smb.h>
56 #include <netsmb/smb_conn.h>
57 #include <netsmb/smb_subr.h>
58
59 /*
60 * Number of seconds between 1970 and 1601 year
61 * (134774 days)
62 */
63 const uint64_t DIFF1970TO1601 = 11644473600ULL;
64 const uint32_t TEN_MIL = 10000000UL;
65
66 /*
67 * Convert NT time (tenths of microseconds since 1601)
68 * to Unix seconds+nanoseconds since 1970. Any time
69 * earlier than 1970 is converted to Unix time zero.
70 * Both are GMT-based (no time zone adjustments).
71 */
72 void
73 smb_time_NT2local(uint64_t nt_time, struct timespec *tsp)
74 {
75 uint64_t nt_sec; /* seconds */
76 uint64_t nt_tus; /* tenths of uSec. */
77
78 /* Optimize time zero. */
79 if (nt_time == 0) {
80 tsp->tv_sec = 0;
81 tsp->tv_nsec = 0;
82 return;
83 }
84
85 nt_sec = nt_time / TEN_MIL;
86 nt_tus = nt_time % TEN_MIL;
87
88 if (nt_sec <= DIFF1970TO1601) {
89 tsp->tv_sec = 0;
90 tsp->tv_nsec = 0;
91 return;
92 }
93 tsp->tv_sec = nt_sec - DIFF1970TO1601;
94 tsp->tv_nsec = nt_tus * 100;
95 }
96
97 /*
98 * Convert Unix time (seconds+nanoseconds since 1970)
99 * to NT time (tenths of microseconds since 1601).
100 * Exception: Convert time zero (really any time in
101 * the first second of 1970) to NT time zero.
102 * Both are GMT-based (no time zone adjustments).
103 */
104 void
105 smb_time_local2NT(struct timespec *tsp, uint64_t *nt_time)
106 {
107 uint64_t nt_sec; /* seconds */
108 uint64_t nt_tus; /* tenths of uSec. */
109
110 if (tsp->tv_sec == 0) {
111 *nt_time = 0;
112 return;
113 }
114
115 nt_sec = tsp->tv_sec + DIFF1970TO1601;
116 nt_tus = tsp->tv_nsec / 100;
117
118 *nt_time = (uint64_t)nt_sec * TEN_MIL + nt_tus;
119 }
120
121 /*
122 * Time zone conversion stuff, only used in old dialects.
123 * Don't adjust time zero for either conversion.
124 */
125 void
126 smb_time_local2server(struct timespec *tsp, int tzoff, long *seconds)
127 {
128 if (tsp->tv_sec <= (tzoff * 60))
129 *seconds = 0;
130 else
131 *seconds = tsp->tv_sec - (tzoff * 60);
132 }
133
134 void
135 smb_time_server2local(ulong_t seconds, int tzoff, struct timespec *tsp)
136 {
137 if (seconds == 0)
138 tsp->tv_sec = 0;
139 else
140 tsp->tv_sec = seconds + tzoff * 60;
141 tsp->tv_nsec = 0;
142 }