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 1.27 2007/02/21 15:46:48 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/wait.h>
  48 #include <sys/unistd.h>
  49
  50 #include <machine/stdarg.h>
  51
  52 #include <sys/iconv.h>
  53
  54 #include "smb.h"
  55 #include "smb_conn.h"
  56 #include "smb_rq.h"
  57 #include "smb_subr.h"
  58
  59 MALLOC_DEFINE(M_SMBDATA, "SMBDATA", "Misc netsmb data");
  60 MALLOC_DEFINE(M_SMBSTR, "SMBSTR", "netsmb string data");
  61 MALLOC_DEFINE(M_SMBTEMP, "SMBTEMP", "Temp netsmb data");
  62
  63 smb_unichar smb_unieol = 0;
  64
  65 void
  66 smb_makescred(struct smb_cred *scred, struct thread *td, struct ucred *cred)
  67 {
  68         scred->scr_td = td;
  69         if (td && td->td_proc) {
  70                 scred->scr_cred = cred ? cred : td->td_proc->p_ucred;
  71         } else {
  72                 scred->scr_cred = cred ? cred : NULL;
  73         }
  74 }
  75
  76 int
  77 smb_proc_intr(struct thread *td)
  78 {
  79         sigset_t tmpset;
  80         struct proc *p;
  81         struct lwp *lp;
  82
  83         if (td == NULL || (p = td->td_proc) == NULL)
  84                 return 0;
  85         lp = td->td_lwp;
  86         tmpset = lwp_sigpend(lp);
  87         SIGSETNAND(tmpset, lp->lwp_sigmask);
  88         SIGSETNAND(tmpset, p->p_sigignore);
  89         if (SIGNOTEMPTY(tmpset) && SMB_SIGMASK(tmpset))
  90                 return EINTR;
  91         return 0;
  92 }
  93
  94 char *
  95 smb_strdup(const char *s)
  96 {
  97         char *p;
  98         int len;
  99
 100         len = s ? strlen(s) + 1 : 1;
 101         p = kmalloc(len, M_SMBSTR, M_WAITOK);
 102         if (s)
 103                 bcopy(s, p, len);
 104         else
 105                 *p = 0;
 106         return p;
 107 }
 108
 109 /*
 110  * duplicate string from a user space.
 111  */
 112 char *
 113 smb_strdupin(char *s, int maxlen)
 114 {
 115         char *p, bt;
 116         int len = 0;
 117
 118         for (p = s; ;p++) {
 119                 if (copyin(p, &bt, 1))
 120                         return NULL;
 121                 len++;
 122                 if (maxlen && len > maxlen)
 123                         return NULL;
 124                 if (bt == 0)
 125                         break;
 126         }
 127         p = kmalloc(len, M_SMBSTR, M_WAITOK);
 128         copyin(s, p, len);
 129         return p;
 130 }
 131
 132 /*
 133  * duplicate memory block from a user space.
 134  */
 135 void *
 136 smb_memdupin(void *umem, int len)
 137 {
 138         char *p;
 139
 140         if (len > 8 * 1024)
 141                 return NULL;
 142         p = kmalloc(len, M_SMBSTR, M_WAITOK);
 143         if (copyin(umem, p, len) == 0)
 144                 return p;
 145         kfree(p, M_SMBSTR);
 146         return NULL;
 147 }
 148
 149 /*
 150  * duplicate memory block in the kernel space.
 151  */
 152 void *
 153 smb_memdup(const void *umem, int len)
 154 {
 155         char *p;
 156
 157         if (len > 8 * 1024)
 158                 return NULL;
 159         p = kmalloc(len, M_SMBSTR, M_WAITOK);
 160         if (p == NULL)
 161                 return NULL;
 162         bcopy(umem, p, len);
 163         return p;
 164 }
 165
 166 void
 167 smb_strfree(char *s)
 168 {
 169         kfree(s, M_SMBSTR);
 170 }
 171
 172 void
 173 smb_memfree(void *s)
 174 {
 175         kfree(s, M_SMBSTR);
 176 }
 177
 178 void *
 179 smb_zmalloc(unsigned long size, struct malloc_type *type, int flags)
 180 {
 181
 182         return kmalloc(size, type, flags | M_ZERO);
 183 }
 184
 185 void
 186 smb_strtouni(u_int16_t *dst, const char *src)
 187 {
 188         while (*src) {
 189                 *dst++ = htoles(*src++);
 190         }
 191         *dst = 0;
 192 }
 193
 194 #ifdef SMB_SOCKETDATA_DEBUG
 195 void
 196 m_dumpm(struct mbuf *m) {
 197         char *p;
 198         int len;
 199         kprintf("d=");
 200         while(m) {
 201                 p=mtod(m,char *);
 202                 len=m->m_len;
 203                 kprintf("(%d)",len);
 204                 while(len--){
 205                         kprintf("%02x ",((int)*(p++)) & 0xff);
 206                 }
 207                 m=m->m_next;
 208         };
 209         kprintf("\n");
 210 }
 211 #endif
 212
 213 int
 214 smb_maperror(int eclass, int eno)
 215 {
 216         if (eclass == 0 && eno == 0)
 217                 return 0;
 218         switch (eclass) {
 219             case ERRDOS:
 220                 switch (eno) {
 221                     case ERRbadfunc:
 222                     case ERRbadmcb:
 223                     case ERRbadenv:
 224                     case ERRbadformat:
 225                     case ERRrmuns:
 226                         return EINVAL;
 227                     case ERRbadfile:
 228                     case ERRbadpath:
 229                     case ERRremcd:
 230                     case 66:            /* nt returns it when share not available */
 231                     case 67:            /* observed from nt4sp6 when sharename wrong */
 232                         return ENOENT;
 233                     case ERRnofids:
 234                         return EMFILE;
 235                     case ERRnoaccess:
 236                     case ERRbadshare:
 237                         return EACCES;
 238                     case ERRbadfid:
 239                         return EBADF;
 240                     case ERRnomem:
 241                         return ENOMEM;  /* actually remote no mem... */
 242                     case ERRbadmem:
 243                         return EFAULT;
 244                     case ERRbadaccess:
 245                         return EACCES;
 246                     case ERRbaddata:
 247                         return E2BIG;
 248                     case ERRbaddrive:
 249                     case ERRnotready:   /* nt */
 250                         return ENXIO;
 251                     case ERRdiffdevice:
 252                         return EXDEV;
 253                     case ERRnofiles:
 254                         return 0;       /* eeof ? */
 255                         return ETXTBSY;
 256                     case ERRlock:
 257                         return EDEADLK;
 258                     case ERRfilexists:
 259                         return EEXIST;
 260                     case 123:           /* dunno what is it, but samba maps as noent */
 261                         return ENOENT;
 262                     case 145:           /* samba */
 263                         return ENOTEMPTY;
 264                     case 183:
 265                         return EEXIST;
 266                 }
 267                 break;
 268             case ERRSRV:
 269                 switch (eno) {
 270                     case ERRerror:
 271                         return EINVAL;
 272                     case ERRbadpw:
 273                         return EAUTH;
 274                     case ERRaccess:
 275                         return EACCES;
 276                     case ERRinvnid:
 277                         return ENETRESET;
 278                     case ERRinvnetname:
 279                         SMBERROR("NetBIOS name is invalid\n");
 280                         return EAUTH;
 281                     case 3:             /* reserved and returned */
 282                         return EIO;
 283                     case 2239:          /* NT: account exists but disabled */
 284                         return EPERM;
 285                 }
 286                 break;
 287             case ERRHRD:
 288                 switch (eno) {
 289                     case ERRnowrite:
 290                         return EROFS;
 291                     case ERRbadunit:
 292                         return ENODEV;
 293                     case ERRnotready:
 294                     case ERRbadcmd:
 295                     case ERRdata:
 296                         return EIO;
 297                     case ERRbadreq:
 298                         return EBADRPC;
 299                     case ERRbadshare:
 300                         return ETXTBSY;
 301                     case ERRlock:
 302                         return EDEADLK;
 303                 }
 304                 break;
 305         }
 306         SMBERROR("Unmapped error %d:%d\n", eclass, eno);
 307         return EBADRPC;
 308 }
 309
 310 static int
 311 smb_copy_iconv(struct mbchain *mbp, c_caddr_t src, caddr_t dst, int len)
 312 {
 313         int outlen = len;
 314
 315         return iconv_conv((struct iconv_drv*)mbp->mb_udata, &src, &len, &dst, &outlen);
 316 }
 317
 318 int
 319 smb_put_dmem(struct mbchain *mbp, struct smb_vc *vcp, const char *src,
 320         int size, int caseopt)
 321 {
 322         struct iconv_drv *dp = vcp->vc_toserver;
 323
 324         if (size == 0)
 325                 return 0;
 326         if (dp == NULL) {
 327                 return mb_put_mem(mbp, src, size, MB_MSYSTEM);
 328         }
 329         mbp->mb_copy = smb_copy_iconv;
 330         mbp->mb_udata = dp;
 331         return mb_put_mem(mbp, src, size, MB_MCUSTOM);
 332 }
 333
 334 int
 335 smb_put_dstring(struct mbchain *mbp, struct smb_vc *vcp, const char *src,
 336         int caseopt)
 337 {
 338         int error;
 339
 340         error = smb_put_dmem(mbp, vcp, src, strlen(src), caseopt);
 341         if (error)
 342                 return error;
 343         return mb_put_uint8(mbp, 0);
 344 }
 345
 346 int
 347 smb_put_asunistring(struct smb_rq *rqp, const char *src)
 348 {
 349         struct mbchain *mbp = &rqp->sr_rq;
 350         struct iconv_drv *dp = rqp->sr_vc->vc_toserver;
 351         u_char c;
 352         int error;
 353
 354         while (*src) {
 355                 iconv_convmem(dp, &c, src++, 1);
 356                 error = mb_put_uint16le(mbp, c);
 357                 if (error)
 358                         return error;
 359         }
 360         return mb_put_uint16le(mbp, 0);
 361 }
 362
 363 /*
 364  * Create a kernel process/thread/whatever.  It shares it's address space
 365  * with proc0 - ie: kernel only.
 366  *
 367  * XXX only the SMB protocol uses this, we should convert this mess to a
 368  * pure thread when possible.
 369  */
 370 int
 371 kthread_create2(void (*func)(void *), void *arg,
 372     struct proc **newpp, int flags, const char *fmt, ...)
 373 {
 374         int error;
 375         __va_list ap;
 376         struct proc *p2;
 377         struct lwp *lp2;
 378
 379         error = fork1(&lwp0, RFMEM | RFFDG | RFPROC | flags, &p2);
 380         if (error)
 381                 return error;
 382
 383         /* save a global descriptor, if desired */
 384         if (newpp != NULL)
 385                 *newpp = p2;
 386
 387         /* this is a non-swapped system process */
 388         p2->p_flag |= P_SYSTEM;
 389         p2->p_procsig->ps_flag |= PS_NOCLDWAIT;
 390
 391         lp2 = ONLY_LWP_IN_PROC(p2);
 392
 393         /* set up arg0 for 'ps', et al */
 394         __va_start(ap, fmt);
 395         kvsnprintf(p2->p_comm, sizeof(p2->p_comm), fmt, ap);
 396         __va_end(ap);
 397
 398         /* call the processes' main()... */
 399         cpu_set_fork_handler(lp2, func, arg);
 400         start_forked_proc(&lwp0, p2);
 401
 402         return 0;
 403 }
 404
 405 void
 406 kthread_exit2(void)
 407 {
 408         exit1(0);
 409 }
 410
 411 /*
 412  * smb_sleep() icky compat routine.  Leave the token held through the tsleep
 413  * to interlock against the sleep.  Remember that the token could be lost
 414  * since we blocked, so reget or release as appropriate.
 415  */
 416 int
 417 smb_sleep(void *chan, struct smb_slock *sl, int slpflags, const char *wmesg, int timo)
 418 {
 419         int error;
 420
 421         if (sl) {
 422                 crit_enter();
 423                 tsleep_interlock(chan);
 424                 smb_sl_unlock(sl);
 425                 error = tsleep(chan, slpflags, wmesg, timo);
 426                 if ((slpflags & PDROP) == 0)
 427                         smb_sl_lock(sl);
 428                 crit_exit();
 429         } else {
 430                 error = tsleep(chan, slpflags, wmesg, timo);
 431         }
 432         return error;
 433 }
 434