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 1.28 2007/02/25 23:17:13 corecode 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         if (p == NULL)
 162                 return NULL;
 163         bcopy(umem, p, len);
 164         return p;
 165 }
 166
 167 void
 168 smb_strfree(char *s)
 169 {
 170         kfree(s, M_SMBSTR);
 171 }
 172
 173 void
 174 smb_memfree(void *s)
 175 {
 176         kfree(s, M_SMBSTR);
 177 }
 178
 179 void *
 180 smb_zmalloc(unsigned long size, struct malloc_type *type, int flags)
 181 {
 182
 183         return kmalloc(size, type, flags | M_ZERO);
 184 }
 185
 186 void
 187 smb_strtouni(u_int16_t *dst, const char *src)
 188 {
 189         while (*src) {
 190                 *dst++ = htoles(*src++);
 191         }
 192         *dst = 0;
 193 }
 194
 195 #ifdef SMB_SOCKETDATA_DEBUG
 196 void
 197 m_dumpm(struct mbuf *m) {
 198         char *p;
 199         int len;
 200         kprintf("d=");
 201         while(m) {
 202                 p=mtod(m,char *);
 203                 len=m->m_len;
 204                 kprintf("(%d)",len);
 205                 while(len--){
 206                         kprintf("%02x ",((int)*(p++)) & 0xff);
 207                 }
 208                 m=m->m_next;
 209         };
 210         kprintf("\n");
 211 }
 212 #endif
 213
 214 int
 215 smb_maperror(int eclass, int eno)
 216 {
 217         if (eclass == 0 && eno == 0)
 218                 return 0;
 219         switch (eclass) {
 220             case ERRDOS:
 221                 switch (eno) {
 222                     case ERRbadfunc:
 223                     case ERRbadmcb:
 224                     case ERRbadenv:
 225                     case ERRbadformat:
 226                     case ERRrmuns:
 227                         return EINVAL;
 228                     case ERRbadfile:
 229                     case ERRbadpath:
 230                     case ERRremcd:
 231                     case 66:            /* nt returns it when share not available */
 232                     case 67:            /* observed from nt4sp6 when sharename wrong */
 233                         return ENOENT;
 234                     case ERRnofids:
 235                         return EMFILE;
 236                     case ERRnoaccess:
 237                     case ERRbadshare:
 238                         return EACCES;
 239                     case ERRbadfid:
 240                         return EBADF;
 241                     case ERRnomem:
 242                         return ENOMEM;  /* actually remote no mem... */
 243                     case ERRbadmem:
 244                         return EFAULT;
 245                     case ERRbadaccess:
 246                         return EACCES;
 247                     case ERRbaddata:
 248                         return E2BIG;
 249                     case ERRbaddrive:
 250                     case ERRnotready:   /* nt */
 251                         return ENXIO;
 252                     case ERRdiffdevice:
 253                         return EXDEV;
 254                     case ERRnofiles:
 255                         return 0;       /* eeof ? */
 256                         return ETXTBSY;
 257                     case ERRlock:
 258                         return EDEADLK;
 259                     case ERRfilexists:
 260                         return EEXIST;
 261                     case 123:           /* dunno what is it, but samba maps as noent */
 262                         return ENOENT;
 263                     case 145:           /* samba */
 264                         return ENOTEMPTY;
 265                     case 183:
 266                         return EEXIST;
 267                 }
 268                 break;
 269             case ERRSRV:
 270                 switch (eno) {
 271                     case ERRerror:
 272                         return EINVAL;
 273                     case ERRbadpw:
 274                         return EAUTH;
 275                     case ERRaccess:
 276                         return EACCES;
 277                     case ERRinvnid:
 278                         return ENETRESET;
 279                     case ERRinvnetname:
 280                         SMBERROR("NetBIOS name is invalid\n");
 281                         return EAUTH;
 282                     case 3:             /* reserved and returned */
 283                         return EIO;
 284                     case 2239:          /* NT: account exists but disabled */
 285                         return EPERM;
 286                 }
 287                 break;
 288             case ERRHRD:
 289                 switch (eno) {
 290                     case ERRnowrite:
 291                         return EROFS;
 292                     case ERRbadunit:
 293                         return ENODEV;
 294                     case ERRnotready:
 295                     case ERRbadcmd:
 296                     case ERRdata:
 297                         return EIO;
 298                     case ERRbadreq:
 299                         return EBADRPC;
 300                     case ERRbadshare:
 301                         return ETXTBSY;
 302                     case ERRlock:
 303                         return EDEADLK;
 304                 }
 305                 break;
 306         }
 307         SMBERROR("Unmapped error %d:%d\n", eclass, eno);
 308         return EBADRPC;
 309 }
 310
 311 static int
 312 smb_copy_iconv(struct mbchain *mbp, c_caddr_t src, caddr_t dst, int len)
 313 {
 314         int outlen = len;
 315
 316         return iconv_conv((struct iconv_drv*)mbp->mb_udata, &src, &len, &dst, &outlen);
 317 }
 318
 319 int
 320 smb_put_dmem(struct mbchain *mbp, struct smb_vc *vcp, const char *src,
 321         int size, int caseopt)
 322 {
 323         struct iconv_drv *dp = vcp->vc_toserver;
 324
 325         if (size == 0)
 326                 return 0;
 327         if (dp == NULL) {
 328                 return mb_put_mem(mbp, src, size, MB_MSYSTEM);
 329         }
 330         mbp->mb_copy = smb_copy_iconv;
 331         mbp->mb_udata = dp;
 332         return mb_put_mem(mbp, src, size, MB_MCUSTOM);
 333 }
 334
 335 int
 336 smb_put_dstring(struct mbchain *mbp, struct smb_vc *vcp, const char *src,
 337         int caseopt)
 338 {
 339         int error;
 340
 341         error = smb_put_dmem(mbp, vcp, src, strlen(src), caseopt);
 342         if (error)
 343                 return error;
 344         return mb_put_uint8(mbp, 0);
 345 }
 346
 347 int
 348 smb_put_asunistring(struct smb_rq *rqp, const char *src)
 349 {
 350         struct mbchain *mbp = &rqp->sr_rq;
 351         struct iconv_drv *dp = rqp->sr_vc->vc_toserver;
 352         u_char c;
 353         int error;
 354
 355         while (*src) {
 356                 iconv_convmem(dp, &c, src++, 1);
 357                 error = mb_put_uint16le(mbp, c);
 358                 if (error)
 359                         return error;
 360         }
 361         return mb_put_uint16le(mbp, 0);
 362 }
 363
 364 /*
 365  * Create a kernel process/thread/whatever.  It shares it's address space
 366  * with proc0 - ie: kernel only.
 367  *
 368  * XXX only the SMB protocol uses this, we should convert this mess to a
 369  * pure thread when possible.
 370  */
 371 int
 372 kthread_create2(void (*func)(void *), void *arg,
 373     struct proc **newpp, int flags, const char *fmt, ...)
 374 {
 375         int error;
 376         __va_list ap;
 377         struct proc *p2;
 378         struct lwp *lp2;
 379
 380         error = fork1(&lwp0, RFMEM | RFFDG | RFPROC | flags, &p2);
 381         if (error)
 382                 return error;
 383
 384         /* save a global descriptor, if desired */
 385         if (newpp != NULL)
 386                 *newpp = p2;
 387
 388         /* this is a non-swapped system process */
 389         p2->p_flag |= P_SYSTEM;
 390         p2->p_sigacts->ps_flag |= PS_NOCLDWAIT;
 391
 392         lp2 = ONLY_LWP_IN_PROC(p2);
 393
 394         /* set up arg0 for 'ps', et al */
 395         __va_start(ap, fmt);
 396         kvsnprintf(p2->p_comm, sizeof(p2->p_comm), fmt, ap);
 397         __va_end(ap);
 398
 399         /* call the processes' main()... */
 400         cpu_set_fork_handler(lp2, func, arg);
 401         start_forked_proc(&lwp0, p2);
 402
 403         return 0;
 404 }
 405
 406 void
 407 kthread_exit2(void)
 408 {
 409         exit1(0);
 410 }
 411
 412 /*
 413  * smb_sleep() icky compat routine.  Leave the token held through the tsleep
 414  * to interlock against the sleep.  Remember that the token could be lost
 415  * since we blocked, so reget or release as appropriate.
 416  */
 417 int
 418 smb_sleep(void *chan, struct smb_slock *sl, int slpflags, const char *wmesg, int timo)
 419 {
 420         int error;
 421
 422         if (sl) {
 423                 crit_enter();
 424                 tsleep_interlock(chan);
 425                 smb_sl_unlock(sl);
 426                 error = tsleep(chan, slpflags, wmesg, timo);
 427                 if ((slpflags & PDROP) == 0)
 428                         smb_sl_lock(sl);
 429                 crit_exit();
 430         } else {
 431                 error = tsleep(chan, slpflags, wmesg, timo);
 432         }
 433         return error;
 434 }
 435