1/* $NetBSD: smbfs_subr.c,v 1.19 2014/11/17 02:23:33 christos Exp $ */
2
3/*
4 * Copyright (c) 2000-2001, Boris Popov
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by Boris Popov.
18 * 4. Neither the name of the author nor the names of any co-contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * FreeBSD: src/sys/fs/smbfs/smbfs_subr.c,v 1.1 2001/04/10 07:59:05 bp Exp
35 */
36
37#include <sys/cdefs.h>
38__KERNEL_RCSID(0, "$NetBSD: smbfs_subr.c,v 1.19 2014/11/17 02:23:33 christos Exp $");
39
40#include <sys/param.h>
41#include <sys/systm.h>
42#include <sys/kernel.h>
43#include <sys/malloc.h>
44#include <sys/mount.h>
45#include <sys/time.h>
46#include <sys/vnode.h>
47#include <sys/sysctl.h>
48#include <sys/clock.h>
49#include <netsmb/iconv.h>
50
51#include <netsmb/smb.h>
52#include <netsmb/smb_conn.h>
53#include <netsmb/smb_subr.h>
54#include <netsmb/smb_rq.h>
55#include <netsmb/smb_dev.h>
56
57#include <fs/smbfs/smbfs.h>
58#include <fs/smbfs/smbfs_node.h>
59#include <fs/smbfs/smbfs_subr.h>
60
61MALLOC_JUSTDEFINE(M_SMBFSDATA, "SMBFS data", "SMBFS private data");
62
63/*
64 * Time & date conversion routines taken from msdosfs. Although leap
65 * year calculation is bogus, it's sufficient before 2100 :)
66 */
67/*
68 * This is the format of the contents of the deTime field in the direntry
69 * structure.
70 * We don't use bitfields because we don't know how compilers for
71 * arbitrary machines will lay them out.
72 */
73#define DT_2SECONDS_MASK 0x1F /* seconds divided by 2 */
74#define DT_2SECONDS_SHIFT 0
75#define DT_MINUTES_MASK 0x7E0 /* minutes */
76#define DT_MINUTES_SHIFT 5
77#define DT_HOURS_MASK 0xF800 /* hours */
78#define DT_HOURS_SHIFT 11
79
80/*
81 * This is the format of the contents of the deDate field in the direntry
82 * structure.
83 */
84#define DD_DAY_MASK 0x1F /* day of month */
85#define DD_DAY_SHIFT 0
86#define DD_MONTH_MASK 0x1E0 /* month */
87#define DD_MONTH_SHIFT 5
88#define DD_YEAR_MASK 0xFE00 /* year - 1980 */
89#define DD_YEAR_SHIFT 9
90/*
91 * Total number of days that have passed for each month in a regular year.
92 */
93static const u_short regyear[] = {
94 31, 59, 90, 120, 151, 181,
95 212, 243, 273, 304, 334, 365
96};
97
98/*
99 * Total number of days that have passed for each month in a leap year.
100 */
101static const u_short leapyear[] = {
102 31, 60, 91, 121, 152, 182,
103 213, 244, 274, 305, 335, 366
104};
105
106/*
107 * Variables used to remember parts of the last time conversion. Maybe we
108 * can avoid a full conversion.
109 */
110static u_long lasttime;
111static u_long lastday;
112static u_short lastddate;
113static u_short lastdtime;
114
115void
116smb_time_local2server(struct timespec *tsp, int tzoff, u_long *seconds)
117{
118 *seconds = tsp->tv_sec - tzoff * 60 /*- tz.tz_minuteswest * 60 -
119 (wall_cmos_clock ? adjkerntz : 0)*/;
120}
121
122void
123smb_time_server2local(u_long seconds, int tzoff, struct timespec *tsp)
124{
125 tsp->tv_sec = seconds + tzoff * 60;
126 /*+ tz.tz_minuteswest * 60 + (wall_cmos_clock ? adjkerntz : 0)*/;
127}
128
129/*
130 * Number of seconds between 1970 and 1601 year
131 */
132static const int64_t DIFF1970TO1601 = 11644473600ULL;
133
134/*
135 * Time from server comes as UTC, so no need to use tz
136 */
137void
138smb_time_NT2local(int64_t nsec, int tzoff, struct timespec *tsp)
139{
140 smb_time_server2local(nsec / 10000000 - DIFF1970TO1601, 0, tsp);
141}
142
143void
144smb_time_local2NT(struct timespec *tsp, int tzoff, int64_t *nsec)
145{
146 u_long seconds;
147
148 smb_time_local2server(tsp, 0, &seconds);
149 *nsec = ((int64_t)seconds + DIFF1970TO1601) * (int64_t)10000000;
150}
151
152void
153smb_time_unix2dos(struct timespec *tsp, int tzoff, u_int16_t *ddp,
154 u_int16_t *dtp, u_int8_t *dhp)
155{
156 u_long t, days, year, month, inc;
157 const u_short *months;
158
159 /*
160 * If the time from the last conversion is the same as now, then
161 * skip the computations and use the saved result.
162 */
163 smb_time_local2server(tsp, tzoff, &t);
164 t &= ~1;
165 if (lasttime != t) {
166 lasttime = t;
167 lastdtime = (((t / 2) % 30) << DT_2SECONDS_SHIFT)
168 + (((t / 60) % 60) << DT_MINUTES_SHIFT)
169 + (((t / 3600) % 24) << DT_HOURS_SHIFT);
170
171 /*
172 * If the number of days since 1970 is the same as the last
173 * time we did the computation then skip all this leap year
174 * and month stuff.
175 */
176 days = t / (24 * 60 * 60);
177 if (days != lastday) {
178 lastday = days;
179 for (year = 1970;; year++) {
180 inc = days_per_year(year);
181 if (days < inc)
182 break;
183 days -= inc;
184 }
185 months = is_leap_year(year) ? leapyear : regyear;
186 for (month = 0; days >= months[month]; month++)
187 ;
188 if (month > 0)
189 days -= months[month - 1];
190 lastddate = ((days + 1) << DD_DAY_SHIFT)
191 + ((month + 1) << DD_MONTH_SHIFT);
192 /*
193 * Remember dos's idea of time is relative to 1980.
194 * unix's is relative to 1970. If somehow we get a
195 * time before 1980 then don't give totally crazy
196 * results.
197 */
198 if (year > 1980)
199 lastddate += (year - 1980) << DD_YEAR_SHIFT;
200 }
201 }
202 if (dtp)
203 *dtp = lastdtime;
204 if (dhp)
205 *dhp = (tsp->tv_sec & 1) * 100 + tsp->tv_nsec / 10000000;
206
207 *ddp = lastddate;
208}
209
210/*
211 * The number of seconds between Jan 1, 1970 and Jan 1, 1980. In that
212 * interval there were 8 regular years and 2 leap years.
213 */
214#define SECONDSTO1980 (((8 * 365) + (2 * 366)) * (24 * 60 * 60))
215
216static u_short lastdosdate;
217static u_long lastseconds;
218
219void
220smb_dos2unixtime(u_int dd, u_int dt, u_int dh, int tzoff,
221 struct timespec *tsp)
222{
223 u_long seconds;
224 u_long month;
225 u_long year;
226 u_long days;
227 const u_short *months;
228
229 if (dd == 0) {
230 tsp->tv_sec = 0;
231 tsp->tv_nsec = 0;
232 return;
233 }
234 seconds = (((dt & DT_2SECONDS_MASK) >> DT_2SECONDS_SHIFT) << 1)
235 + ((dt & DT_MINUTES_MASK) >> DT_MINUTES_SHIFT) * 60
236 + ((dt & DT_HOURS_MASK) >> DT_HOURS_SHIFT) * 3600
237 + dh / 100;
238 /*
239 * If the year, month, and day from the last conversion are the
240 * same then use the saved value.
241 */
242 if (lastdosdate != dd) {
243 lastdosdate = dd;
244 days = 0;
245 year = (dd & DD_YEAR_MASK) >> DD_YEAR_SHIFT;
246 days = year * 365;
247 days += year / 4 + 1; /* add in leap days */
248 if ((year & 0x03) == 0)
249 days--; /* if year is a leap year */
250 months = year & 0x03 ? regyear : leapyear;
251 month = (dd & DD_MONTH_MASK) >> DD_MONTH_SHIFT;
252 if (month < 1 || month > 12) {
253 month = 1;
254 }
255 if (month > 1)
256 days += months[month - 2];
257 days += ((dd & DD_DAY_MASK) >> DD_DAY_SHIFT) - 1;
258 lastseconds = (days * 24 * 60 * 60) + SECONDSTO1980;
259 }
260 smb_time_server2local(seconds + lastseconds, tzoff, tsp);
261 tsp->tv_nsec = (dh % 100) * 10000000;
262}
263
264static int
265smb_fphelp(struct mbchain *mbp, struct smb_vc *vcp, struct smbnode *np,
266 int caseopt)
267{
268 struct smbmount *smp= np->n_mount;
269 struct smbnode **npp = smp->sm_npstack;
270 int i, error = 0;
271
272/* mutex_enter(&smp->sm_npslock);*/
273 i = 0;
274 while (np->n_parent) {
275 if (i++ == SMBFS_MAXPATHCOMP) {
276/* mutex_exit(&smp->sm_npslock);*/
277 return ENAMETOOLONG;
278 }
279 *npp++ = np;
280 np = VTOSMB(np->n_parent);
281 }
282 while (i--) {
283 np = *--npp;
284 error = mb_put_uint8(mbp, '\\');
285 if (error)
286 break;
287 error = smb_put_dmem(mbp, vcp, np->n_name, np->n_nmlen, caseopt);
288 if (error)
289 break;
290 }
291/* mutex_exit(&smp->sm_npslock);*/
292 return error;
293}
294
295int
296smbfs_fullpath(struct mbchain *mbp, struct smb_vc *vcp, struct smbnode *dnp,
297 const char *name, int nmlen)
298{
299 int caseopt = SMB_CS_NONE;
300 int error;
301
302 if (SMB_DIALECT(vcp) < SMB_DIALECT_LANMAN1_0)
303 caseopt |= SMB_CS_UPPER;
304 if (dnp != NULL) {
305 error = smb_fphelp(mbp, vcp, dnp, caseopt);
306 if (error)
307 return error;
308 }
309 if (name) {
310 error = mb_put_uint8(mbp, '\\');
311 if (error)
312 return error;
313 error = smb_put_dmem(mbp, vcp, name, nmlen, caseopt);
314 if (error)
315 return error;
316 }
317 error = mb_put_uint8(mbp, 0);
318 return error;
319}
320
321int
322smbfs_fname_tolocal(struct smb_vc *vcp, char *name, int *nmlen,
323 int caseopt)
324{
325 int error = 0;
326 size_t ilen, olen;
327 const char *ibuf;
328 char *obuf, *outbuf;
329
330#ifdef notyet
331 if (caseopt & SMB_CS_UPPER)
332 iconv_convmem(vcp->vc_toupper, name, name, nmlen);
333 else if (caseopt & SMB_CS_LOWER)
334 iconv_convmem(vcp->vc_tolower, name, name, nmlen);
335#endif
336 if (vcp->vc_tolocal) {
337 const size_t buflen = SMB_MAXNAMLEN * 2;
338
339 outbuf = malloc(buflen, M_SMBTEMP, M_WAITOK);
340 if (outbuf == NULL)
341 return ENOMEM;
342 ilen = *nmlen;
343 olen = buflen;
344 ibuf = name;
345 obuf = outbuf;
346 error = iconv_conv(vcp->vc_tolocal, &ibuf, &ilen, &obuf, &olen);
347 if (!error) {
348 *nmlen = buflen - olen;
349 memcpy(name, outbuf, *nmlen);
350 }
351 free(outbuf, M_SMBTEMP);
352 }
353 return error;
354}
355