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 * $FreeBSD: src/sys/fs/smbfs/smbfs_subr.c,v 1.1.2.2 2003/01/17 08:20:26 tjr Exp $ 33 */ 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/kernel.h> 37 #include <sys/malloc.h> 38 #include <machine/clock.h> 39 #include <sys/time.h> 40 #include <sys/vnode.h> 41 #include <sys/sysctl.h> 42 #include <sys/iconv.h> 43 44 #include <netsmb/smb.h> 45 #include <netsmb/smb_conn.h> 46 #include <netsmb/smb_subr.h> 47 #include <netsmb/smb_rq.h> 48 #include <netsmb/smb_dev.h> 49 50 #include <fs/smbfs/smbfs.h> 51 #include <fs/smbfs/smbfs_node.h> 52 #include <fs/smbfs/smbfs_subr.h> 53 54 MALLOC_DEFINE(M_SMBFSDATA, "SMBFS data", "SMBFS private data"); 55 56 /* 57 * Time & date conversion routines taken from msdosfs. Although leap 58 * year calculation is bogus, it's sufficient before 2100 :) 59 */ 60 /* 61 * This is the format of the contents of the deTime field in the direntry 62 * structure. 63 * We don't use bitfields because we don't know how compilers for 64 * arbitrary machines will lay them out. 65 */ 66 #define DT_2SECONDS_MASK 0x1F /* seconds divided by 2 */ 67 #define DT_2SECONDS_SHIFT 0 68 #define DT_MINUTES_MASK 0x7E0 /* minutes */ 69 #define DT_MINUTES_SHIFT 5 70 #define DT_HOURS_MASK 0xF800 /* hours */ 71 #define DT_HOURS_SHIFT 11 72 73 /* 74 * This is the format of the contents of the deDate field in the direntry 75 * structure. 76 */ 77 #define DD_DAY_MASK 0x1F /* day of month */ 78 #define DD_DAY_SHIFT 0 79 #define DD_MONTH_MASK 0x1E0 /* month */ 80 #define DD_MONTH_SHIFT 5 81 #define DD_YEAR_MASK 0xFE00 /* year - 1980 */ 82 #define DD_YEAR_SHIFT 9 83 /* 84 * Total number of days that have passed for each month in a regular year. 85 */ 86 static u_short regyear[] = { 87 31, 59, 90, 120, 151, 181, 88 212, 243, 273, 304, 334, 365 89 }; 90 91 /* 92 * Total number of days that have passed for each month in a leap year. 93 */ 94 static u_short leapyear[] = { 95 31, 60, 91, 121, 152, 182, 96 213, 244, 274, 305, 335, 366 97 }; 98 99 /* 100 * Variables used to remember parts of the last time conversion. Maybe we 101 * can avoid a full conversion. 102 */ 103 static u_long lasttime; 104 static u_long lastday; 105 static u_short lastddate; 106 static u_short lastdtime; 107 108 void 109 smb_time_local2server(struct timespec *tsp, int tzoff, u_long *seconds) 110 { 111 *seconds = tsp->tv_sec - tzoff * 60 /*- tz.tz_minuteswest * 60 - 112 (wall_cmos_clock ? adjkerntz : 0)*/; 113 } 114 115 void 116 smb_time_server2local(u_long seconds, int tzoff, struct timespec *tsp) 117 { 118 tsp->tv_sec = seconds + tzoff * 60; 119 /*+ tz.tz_minuteswest * 60 + (wall_cmos_clock ? adjkerntz : 0)*/; 120 } 121 122 /* 123 * Number of seconds between 1970 and 1601 year 124 */ 125 int64_t DIFF1970TO1601 = 11644473600ULL; 126 127 /* 128 * Time from server comes as UTC, so no need to use tz 129 */ 130 void 131 smb_time_NT2local(int64_t nsec, int tzoff, struct timespec *tsp) 132 { 133 smb_time_server2local(nsec / 10000000 - DIFF1970TO1601, 0, tsp); 134 } 135 136 void 137 smb_time_local2NT(struct timespec *tsp, int tzoff, int64_t *nsec) 138 { 139 u_long seconds; 140 141 smb_time_local2server(tsp, 0, &seconds); 142 *nsec = (((int64_t)(seconds) & ~1) + DIFF1970TO1601) * (int64_t)10000000; 143 } 144 145 void 146 smb_time_unix2dos(struct timespec *tsp, int tzoff, u_int16_t *ddp, 147 u_int16_t *dtp, u_int8_t *dhp) 148 { 149 u_long t, days, year, month, inc; 150 u_short *months; 151 152 /* 153 * If the time from the last conversion is the same as now, then 154 * skip the computations and use the saved result. 155 */ 156 smb_time_local2server(tsp, tzoff, &t); 157 t &= ~1; 158 if (lasttime != t) { 159 lasttime = t; 160 lastdtime = (((t / 2) % 30) << DT_2SECONDS_SHIFT) 161 + (((t / 60) % 60) << DT_MINUTES_SHIFT) 162 + (((t / 3600) % 24) << DT_HOURS_SHIFT); 163 164 /* 165 * If the number of days since 1970 is the same as the last 166 * time we did the computation then skip all this leap year 167 * and month stuff. 168 */ 169 days = t / (24 * 60 * 60); 170 if (days != lastday) { 171 lastday = days; 172 for (year = 1970;; year++) { 173 inc = year & 0x03 ? 365 : 366; 174 if (days < inc) 175 break; 176 days -= inc; 177 } 178 months = year & 0x03 ? regyear : leapyear; 179 for (month = 0; days >= months[month]; month++) 180 ; 181 if (month > 0) 182 days -= months[month - 1]; 183 lastddate = ((days + 1) << DD_DAY_SHIFT) 184 + ((month + 1) << DD_MONTH_SHIFT); 185 /* 186 * Remember dos's idea of time is relative to 1980. 187 * unix's is relative to 1970. If somehow we get a 188 * time before 1980 then don't give totally crazy 189 * results. 190 */ 191 if (year > 1980) 192 lastddate += (year - 1980) << DD_YEAR_SHIFT; 193 } 194 } 195 if (dtp) 196 *dtp = lastdtime; 197 if (dhp) 198 *dhp = (tsp->tv_sec & 1) * 100 + tsp->tv_nsec / 10000000; 199 200 *ddp = lastddate; 201 } 202 203 /* 204 * The number of seconds between Jan 1, 1970 and Jan 1, 1980. In that 205 * interval there were 8 regular years and 2 leap years. 206 */ 207 #define SECONDSTO1980 (((8 * 365) + (2 * 366)) * (24 * 60 * 60)) 208 209 static u_short lastdosdate; 210 static u_long lastseconds; 211 212 void 213 smb_dos2unixtime(u_int dd, u_int dt, u_int dh, int tzoff, 214 struct timespec *tsp) 215 { 216 u_long seconds; 217 u_long month; 218 u_long year; 219 u_long days; 220 u_short *months; 221 222 if (dd == 0) { 223 tsp->tv_sec = 0; 224 tsp->tv_nsec = 0; 225 return; 226 } 227 seconds = (((dt & DT_2SECONDS_MASK) >> DT_2SECONDS_SHIFT) << 1) 228 + ((dt & DT_MINUTES_MASK) >> DT_MINUTES_SHIFT) * 60 229 + ((dt & DT_HOURS_MASK) >> DT_HOURS_SHIFT) * 3600 230 + dh / 100; 231 /* 232 * If the year, month, and day from the last conversion are the 233 * same then use the saved value. 234 */ 235 if (lastdosdate != dd) { 236 lastdosdate = dd; 237 days = 0; 238 year = (dd & DD_YEAR_MASK) >> DD_YEAR_SHIFT; 239 days = year * 365; 240 days += year / 4 + 1; /* add in leap days */ 241 if ((year & 0x03) == 0) 242 days--; /* if year is a leap year */ 243 months = year & 0x03 ? regyear : leapyear; 244 month = (dd & DD_MONTH_MASK) >> DD_MONTH_SHIFT; 245 if (month < 1 || month > 12) { 246 month = 1; 247 } 248 if (month > 1) 249 days += months[month - 2]; 250 days += ((dd & DD_DAY_MASK) >> DD_DAY_SHIFT) - 1; 251 lastseconds = (days * 24 * 60 * 60) + SECONDSTO1980; 252 } 253 smb_time_server2local(seconds + lastseconds, tzoff, tsp); 254 tsp->tv_nsec = (dh % 100) * 10000000; 255 } 256 257 static int 258 smb_fphelp(struct mbchain *mbp, struct smb_vc *vcp, struct smbnode *np, 259 int caseopt) 260 { 261 struct smbmount *smp= np->n_mount; 262 struct smbnode **npp = smp->sm_npstack; 263 int i, error = 0; 264 265 /* simple_lock(&smp->sm_npslock);*/ 266 i = 0; 267 while (np->n_parent) { 268 if (i++ == SMBFS_MAXPATHCOMP) { 269 /* simple_unlock(&smp->sm_npslock);*/ 270 return ENAMETOOLONG; 271 } 272 *npp++ = np; 273 np = VTOSMB(np->n_parent); 274 } 275 /* if (i == 0) 276 return smb_put_dmem(mbp, vcp, "\\", 2, caseopt);*/ 277 while (i--) { 278 np = *--npp; 279 error = mb_put_uint8(mbp, '\\'); 280 if (error) 281 break; 282 error = smb_put_dmem(mbp, vcp, np->n_name, np->n_nmlen, caseopt); 283 if (error) 284 break; 285 } 286 /* simple_unlock(&smp->sm_npslock);*/ 287 return error; 288 } 289 290 int 291 smbfs_fullpath(struct mbchain *mbp, struct smb_vc *vcp, struct smbnode *dnp, 292 const char *name, int nmlen) 293 { 294 int caseopt = SMB_CS_NONE; 295 int error; 296 297 if (SMB_DIALECT(vcp) < SMB_DIALECT_LANMAN1_0) 298 caseopt |= SMB_CS_UPPER; 299 if (dnp != NULL) { 300 error = smb_fphelp(mbp, vcp, dnp, caseopt); 301 if (error) 302 return error; 303 } 304 if (name) { 305 error = mb_put_uint8(mbp, '\\'); 306 if (error) 307 return error; 308 error = smb_put_dmem(mbp, vcp, name, nmlen, caseopt); 309 if (error) 310 return error; 311 } 312 error = mb_put_uint8(mbp, 0); 313 return error; 314 } 315 316 int 317 smbfs_fname_tolocal(struct smb_vc *vcp, char *name, int nmlen, int caseopt) 318 { 319 /* if (caseopt & SMB_CS_UPPER) 320 iconv_convmem(vcp->vc_toupper, name, name, nmlen); 321 else if (caseopt & SMB_CS_LOWER) 322 iconv_convmem(vcp->vc_tolower, name, name, nmlen);*/ 323 if (vcp->vc_tolocal) 324 iconv_convmem(vcp->vc_tolocal, name, name, nmlen); 325 return 0; 326 } 327