sys/netproto/smb/smb_subr.c

   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/netsmb/smb_subr.c,v 1.1.2.2 2001/09/03 08:55:11 bp Exp $
  33  * $DragonFly: src/sys/netproto/smb/smb_subr.c,v 1.30 2008/01/06 16:55:53 swildner Exp $
  34  */
  35 #include <sys/param.h>
  36 #include <sys/systm.h>
  37 #include <sys/kernel.h>
  38 #include <sys/kthread.h>
  39 #include <sys/malloc.h>
  40 #include <sys/mbuf.h>
  41 #include <sys/proc.h>
  42 #include <sys/lock.h>
  43 #include <sys/resourcevar.h>
  44 #include <sys/sysctl.h>
  45 #include <sys/socket.h>
  46 #include <sys/signalvar.h>
  47 #include <sys/signal2.h>
  48 #include <sys/wait.h>
  49 #include <sys/unistd.h>
  50
  51 #include <machine/stdarg.h>
  52
  53 #include <sys/iconv.h>
  54
  55 #include "smb.h"
  56 #include "smb_conn.h"
  57 #include "smb_rq.h"
  58 #include "smb_subr.h"
  59
  60 MALLOC_DEFINE(M_SMBDATA, "SMBDATA", "Misc netsmb data");
  61 MALLOC_DEFINE(M_SMBSTR, "SMBSTR", "netsmb string data");
  62 MALLOC_DEFINE(M_SMBTEMP, "SMBTEMP", "Temp netsmb data");
  63
  64 smb_unichar smb_unieol = 0;
  65
  66 void
  67 smb_makescred(struct smb_cred *scred, struct thread *td, struct ucred *cred)
  68 {
  69         scred->scr_td = td;
  70         if (td && td->td_proc) {
  71                 scred->scr_cred = cred ? cred : td->td_proc->p_ucred;
  72         } else {
  73                 scred->scr_cred = cred ? cred : NULL;
  74         }
  75 }
  76
  77 int
  78 smb_proc_intr(struct thread *td)
  79 {
  80         sigset_t tmpset;
  81         struct proc *p;
  82         struct lwp *lp;
  83
  84         if (td == NULL || (p = td->td_proc) == NULL)
  85                 return 0;
  86         lp = td->td_lwp;
  87         tmpset = lwp_sigpend(lp);
  88         SIGSETNAND(tmpset, lp->lwp_sigmask);
  89         SIGSETNAND(tmpset, p->p_sigignore);
  90         if (SIGNOTEMPTY(tmpset) && SMB_SIGMASK(tmpset))
  91                 return EINTR;
  92         return 0;
  93 }
  94
  95 char *
  96 smb_strdup(const char *s)
  97 {
  98         char *p;
  99         int len;
 100
 101         len = s ? strlen(s) + 1 : 1;
 102         p = kmalloc(len, M_SMBSTR, M_WAITOK);
 103         if (s)
 104                 bcopy(s, p, len);
 105         else
 106                 *p = 0;
 107         return p;
 108 }
 109
 110 /*
 111  * duplicate string from a user space.
 112  */
 113 char *
 114 smb_strdupin(char *s, int maxlen)
 115 {
 116         char *p, bt;
 117         int len = 0;
 118
 119         for (p = s; ;p++) {
 120                 if (copyin(p, &bt, 1))
 121                         return NULL;
 122                 len++;
 123                 if (maxlen && len > maxlen)
 124                         return NULL;
 125                 if (bt == 0)
 126                         break;
 127         }
 128         p = kmalloc(len, M_SMBSTR, M_WAITOK);
 129         copyin(s, p, len);
 130         return p;
 131 }
 132
 133 /*
 134  * duplicate memory block from a user space.
 135  */
 136 void *
 137 smb_memdupin(void *umem, int len)
 138 {
 139         char *p;
 140
 141         if (len > 8 * 1024)
 142                 return NULL;
 143         p = kmalloc(len, M_SMBSTR, M_WAITOK);
 144         if (copyin(umem, p, len) == 0)
 145                 return p;
 146         kfree(p, M_SMBSTR);
 147         return NULL;
 148 }
 149
 150 /*
 151  * duplicate memory block in the kernel space.
 152  */
 153 void *
 154 smb_memdup(const void *umem, int len)
 155 {
 156         char *p;
 157
 158         if (len > 8 * 1024)
 159                 return NULL;
 160         p = kmalloc(len, M_SMBSTR, M_WAITOK);
 161         bcopy(umem, p, len);
 162         return p;
 163 }
 164
 165 void
 166 smb_strfree(char *s)
 167 {
 168         kfree(s, M_SMBSTR);
 169 }
 170
 171 void
 172 smb_memfree(void *s)
 173 {
 174         kfree(s, M_SMBSTR);
 175 }
 176
 177 void *
 178 smb_zmalloc(unsigned long size, struct malloc_type *type, int flags)
 179 {
 180
 181         return kmalloc(size, type, flags | M_ZERO);
 182 }
 183
 184 void
 185 smb_strtouni(u_int16_t *dst, const char *src)
 186 {
 187         while (*src) {
 188                 *dst++ = htoles(*src++);
 189         }
 190         *dst = 0;
 191 }
 192
 193 #ifdef SMB_SOCKETDATA_DEBUG
 194 void
 195 m_dumpm(struct mbuf *m) {
 196         char *p;
 197         int len;
 198         kprintf("d=");
 199         while(m) {
 200                 p=mtod(m,char *);
 201                 len=m->m_len;
 202                 kprintf("(%d)",len);
 203                 while(len--){
 204                         kprintf("%02x ",((int)*(p++)) & 0xff);
 205                 }
 206                 m=m->m_next;
 207         };
 208         kprintf("\n");
 209 }
 210 #endif
 211
 212 int
 213 smb_maperror(int eclass, int eno)
 214 {
 215         if (eclass == 0 && eno == 0)
 216                 return 0;
 217         switch (eclass) {
 218             case ERRDOS:
 219                 switch (eno) {
 220                     case ERRbadfunc:
 221                     case ERRbadmcb:
 222                     case ERRbadenv:
 223                     case ERRbadformat:
 224                     case ERRrmuns:
 225                         return EINVAL;
 226                     case ERRbadfile:
 227                     case ERRbadpath:
 228                     case ERRremcd:
 229                     case 66:            /* nt returns it when share not available */
 230                     case 67:            /* observed from nt4sp6 when sharename wrong */
 231                         return ENOENT;
 232                     case ERRnofids:
 233                         return EMFILE;
 234                     case ERRnoaccess:
 235                     case ERRbadshare:
 236                         return EACCES;
 237                     case ERRbadfid:
 238                         return EBADF;
 239                     case ERRnomem:
 240                         return ENOMEM;  /* actually remote no mem... */
 241                     case ERRbadmem:
 242                         return EFAULT;
 243                     case ERRbadaccess:
 244                         return EACCES;
 245                     case ERRbaddata:
 246                         return E2BIG;
 247                     case ERRbaddrive:
 248                     case ERRnotready:   /* nt */
 249                         return ENXIO;
 250                     case ERRdiffdevice:
 251                         return EXDEV;
 252                     case ERRnofiles:
 253                         return 0;       /* eeof ? */
 254                         return ETXTBSY;
 255                     case ERRlock:
 256                         return EDEADLK;
 257                     case ERRfilexists:
 258                         return EEXIST;
 259                     case 123:           /* dunno what is it, but samba maps as noent */
 260                         return ENOENT;
 261                     case 145:           /* samba */
 262                         return ENOTEMPTY;
 263                     case 183:
 264                         return EEXIST;
 265                 }
 266                 break;
 267             case ERRSRV:
 268                 switch (eno) {
 269                     case ERRerror:
 270                         return EINVAL;
 271                     case ERRbadpw:
 272                         return EAUTH;
 273                     case ERRaccess:
 274                         return EACCES;
 275                     case ERRinvnid:
 276                         return ENETRESET;
 277                     case ERRinvnetname:
 278                         SMBERROR("NetBIOS name is invalid\n");
 279                         return EAUTH;
 280                     case 3:             /* reserved and returned */
 281                         return EIO;
 282                     case 2239:          /* NT: account exists but disabled */
 283                         return EPERM;
 284                 }
 285                 break;
 286             case ERRHRD:
 287                 switch (eno) {
 288                     case ERRnowrite:
 289                         return EROFS;
 290                     case ERRbadunit:
 291                         return ENODEV;
 292                     case ERRnotready:
 293                     case ERRbadcmd:
 294                     case ERRdata:
 295                         return EIO;
 296                     case ERRbadreq:
 297                         return EBADRPC;
 298                     case ERRbadshare:
 299                         return ETXTBSY;
 300                     case ERRlock:
 301                         return EDEADLK;
 302                 }
 303                 break;
 304         }
 305         SMBERROR("Unmapped error %d:%d\n", eclass, eno);
 306         return EBADRPC;
 307 }
 308
 309 static int
 310 smb_copy_iconv(struct mbchain *mbp, c_caddr_t src, caddr_t dst, int len)
 311 {
 312         int outlen = len;
 313
 314         return iconv_conv((struct iconv_drv*)mbp->mb_udata, &src, &len, &dst, &outlen);
 315 }
 316
 317 int
 318 smb_put_dmem(struct mbchain *mbp, struct smb_vc *vcp, const char *src,
 319         int size, int caseopt)
 320 {
 321         struct iconv_drv *dp = vcp->vc_toserver;
 322
 323         if (size == 0)
 324                 return 0;
 325         if (dp == NULL) {
 326                 return mb_put_mem(mbp, src, size, MB_MSYSTEM);
 327         }
 328         mbp->mb_copy = smb_copy_iconv;
 329         mbp->mb_udata = dp;
 330         return mb_put_mem(mbp, src, size, MB_MCUSTOM);
 331 }
 332
 333 int
 334 smb_put_dstring(struct mbchain *mbp, struct smb_vc *vcp, const char *src,
 335         int caseopt)
 336 {
 337         int error;
 338
 339         error = smb_put_dmem(mbp, vcp, src, strlen(src), caseopt);
 340         if (error)
 341                 return error;
 342         return mb_put_uint8(mbp, 0);
 343 }
 344
 345 int
 346 smb_put_asunistring(struct smb_rq *rqp, const char *src)
 347 {
 348         struct mbchain *mbp = &rqp->sr_rq;
 349         struct iconv_drv *dp = rqp->sr_vc->vc_toserver;
 350         u_char c;
 351         int error;
 352
 353         while (*src) {
 354                 iconv_convmem(dp, &c, src++, 1);
 355                 error = mb_put_uint16le(mbp, c);
 356                 if (error)
 357                         return error;
 358         }
 359         return mb_put_uint16le(mbp, 0);
 360 }
 361
 362 /*
 363  * Create a kernel process/thread/whatever.  It shares it's address space
 364  * with proc0 - ie: kernel only.
 365  *
 366  * XXX only the SMB protocol uses this, we should convert this mess to a
 367  * pure thread when possible.
 368  */
 369 int
 370 kthread_create2(void (*func)(void *), void *arg,
 371     struct proc **newpp, int flags, const char *fmt, ...)
 372 {
 373         int error;
 374         __va_list ap;
 375         struct proc *p2;
 376         struct lwp *lp2;
 377
 378         error = fork1(&lwp0, RFMEM | RFFDG | RFPROC | flags, &p2);
 379         if (error)
 380                 return error;
 381
 382         /* save a global descriptor, if desired */
 383         if (newpp != NULL)
 384                 *newpp = p2;
 385
 386         /* this is a non-swapped system process */
 387         p2->p_flag |= P_SYSTEM;
 388         p2->p_sigacts->ps_flag |= PS_NOCLDWAIT;
 389
 390         lp2 = ONLY_LWP_IN_PROC(p2);
 391
 392         /* set up arg0 for 'ps', et al */
 393         __va_start(ap, fmt);
 394         kvsnprintf(p2->p_comm, sizeof(p2->p_comm), fmt, ap);
 395         __va_end(ap);
 396
 397         /* call the processes' main()... */
 398         cpu_set_fork_handler(lp2, (void (*)(void *))func, arg);
 399         start_forked_proc(&lwp0, p2);
 400
 401         return 0;
 402 }
 403
 404 void
 405 kthread_exit2(void)
 406 {
 407         exit1(0);
 408 }
 409
 410 /*
 411  * smb_sleep() icky compat routine.  Leave the token held through the tsleep
 412  * to interlock against the sleep.  Remember that the token could be lost
 413  * since we blocked, so reget or release as appropriate.
 414  */
 415 int
 416 smb_sleep(void *chan, struct smb_slock *sl, int slpflags, const char *wmesg, int timo)
 417 {
 418         int error;
 419
 420         if (sl) {
 421                 crit_enter();
 422                 tsleep_interlock(chan);
 423                 smb_sl_unlock(sl);
 424                 error = tsleep(chan, slpflags, wmesg, timo);
 425                 if ((slpflags & PDROP) == 0)
 426                         smb_sl_lock(sl);
 427                 crit_exit();
 428         } else {
 429                 error = tsleep(chan, slpflags, wmesg, timo);
 430         }
 431         return error;
 432 }
 433