| 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 | |
| 61 | MALLOC_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 | */ |
| 93 | static 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 | */ |
| 101 | static 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 | */ |
| 110 | static u_long lasttime; |
| 111 | static u_long lastday; |
| 112 | static u_short lastddate; |
| 113 | static u_short lastdtime; |
| 114 | |
| 115 | void |
| 116 | smb_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 | |
| 122 | void |
| 123 | smb_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 | */ |
| 132 | static const int64_t DIFF1970TO1601 = 11644473600ULL; |
| 133 | |
| 134 | /* |
| 135 | * Time from server comes as UTC, so no need to use tz |
| 136 | */ |
| 137 | void |
| 138 | smb_time_NT2local(int64_t nsec, int tzoff, struct timespec *tsp) |
| 139 | { |
| 140 | smb_time_server2local(nsec / 10000000 - DIFF1970TO1601, 0, tsp); |
| 141 | } |
| 142 | |
| 143 | void |
| 144 | smb_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 | |
| 152 | void |
| 153 | smb_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 | |
| 216 | static u_short lastdosdate; |
| 217 | static u_long lastseconds; |
| 218 | |
| 219 | void |
| 220 | smb_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 | |
| 264 | static int |
| 265 | smb_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 | |
| 295 | int |
| 296 | smbfs_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 | |
| 321 | int |
| 322 | smbfs_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 | |