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  */
  34 #include <sys/param.h>
  35 #include <sys/systm.h>
  36 #include <sys/endian.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 <sys/signal2.h>
  51 #include <sys/mplock2.h>
  52
  53 #include <machine/stdarg.h>
  54
  55 #include <sys/iconv.h>
  56
  57 #include "smb.h"
  58 #include "smb_conn.h"
  59 #include "smb_rq.h"
  60 #include "smb_subr.h"
  61
  62 MALLOC_DEFINE(M_SMBSTR, "SMBSTR", "netsmb string data");
  63 MALLOC_DEFINE(M_SMBTEMP, "SMBTEMP", "Temp netsmb data");
  64
  65 smb_unichar smb_unieol = 0;
  66
  67 void
  68 smb_makescred(struct smb_cred *scred, struct thread *td, struct ucred *cred)
  69 {
  70         scred->scr_td = td;
  71         if (td && td->td_proc) {
  72                 scred->scr_cred = cred ? cred : td->td_proc->p_ucred;
  73         } else {
  74                 scred->scr_cred = cred ? cred : NULL;
  75         }
  76 }
  77
  78 int
  79 smb_proc_intr(struct thread *td)
  80 {
  81         sigset_t tmpset;
  82         struct proc *p;
  83         struct lwp *lp;
  84
  85         if (td == NULL || (p = td->td_proc) == NULL)
  86                 return 0;
  87         lp = td->td_lwp;
  88         tmpset = lwp_sigpend(lp);
  89         SIGSETNAND(tmpset, lp->lwp_sigmask);
  90         SIGSETNAND(tmpset, p->p_sigignore);
  91         if (SIGNOTEMPTY(tmpset) && SMB_SIGMASK(tmpset))
  92                 return EINTR;
  93         return 0;
  94 }
  95
  96 char *
  97 smb_strdup(const char *s)
  98 {
  99         char *p;
 100         int len;
 101
 102         len = s ? strlen(s) + 1 : 1;
 103         p = kmalloc(len, M_SMBSTR, M_WAITOK);
 104         if (s)
 105                 bcopy(s, p, len);
 106         else
 107                 *p = 0;
 108         return p;
 109 }
 110
 111 /*
 112  * duplicate string from a user space.
 113  */
 114 char *
 115 smb_strdupin(char *s, int maxlen)
 116 {
 117         char *p, bt;
 118         int len = 0;
 119
 120         for (p = s; ;p++) {
 121                 if (copyin(p, &bt, 1))
 122                         return NULL;
 123                 len++;
 124                 if (maxlen && len > maxlen)
 125                         return NULL;
 126                 if (bt == 0)
 127                         break;
 128         }
 129         p = kmalloc(len, M_SMBSTR, M_WAITOK);
 130         copyin(s, p, len);
 131         return p;
 132 }
 133
 134 /*
 135  * duplicate memory block from a user space.
 136  */
 137 void *
 138 smb_memdupin(void *umem, int len)
 139 {
 140         char *p;
 141
 142         if (len > 8 * 1024)
 143                 return NULL;
 144         p = kmalloc(len, M_SMBSTR, M_WAITOK);
 145         if (copyin(umem, p, len) == 0)
 146                 return p;
 147         kfree(p, M_SMBSTR);
 148         return NULL;
 149 }
 150
 151 /*
 152  * duplicate memory block in the kernel space.
 153  */
 154 void *
 155 smb_memdup(const void *umem, int len)
 156 {
 157         char *p;
 158
 159         if (len > 8 * 1024)
 160                 return NULL;
 161         p = kmalloc(len, M_SMBSTR, M_WAITOK);
 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++ = htole16(*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,
 312     size_t *srclen, size_t *dstlen)
 313 {
 314         int error;
 315         size_t inlen = *srclen, outlen = *dstlen;
 316
 317         error = iconv_conv((struct iconv_drv*)mbp->mb_udata, &src, &inlen,
 318             &dst, &outlen);
 319         if (inlen != *srclen || outlen != *dstlen) {
 320                 *srclen -= inlen;
 321                 *dstlen -= outlen;
 322                 return 0;
 323         } else {
 324                 return error;
 325         }
 326 }
 327
 328 int
 329 smb_put_dmem(struct mbchain *mbp, struct smb_vc *vcp, const char *src,
 330         int size, int caseopt)
 331 {
 332         struct iconv_drv *dp = vcp->vc_toserver;
 333
 334         if (size == 0)
 335                 return 0;
 336         if (dp == NULL) {
 337                 return mb_put_mem(mbp, src, size, MB_MSYSTEM);
 338         }
 339         mbp->mb_copy = smb_copy_iconv;
 340         mbp->mb_udata = dp;
 341         return mb_put_mem(mbp, src, size, MB_MCUSTOM);
 342 }
 343
 344 int
 345 smb_put_dstring(struct mbchain *mbp, struct smb_vc *vcp, const char *src,
 346         int caseopt)
 347 {
 348         int error;
 349
 350         error = smb_put_dmem(mbp, vcp, src, strlen(src), caseopt);
 351         if (error)
 352                 return error;
 353         return mb_put_uint8(mbp, 0);
 354 }
 355
 356 int
 357 smb_put_asunistring(struct smb_rq *rqp, const char *src)
 358 {
 359         struct mbchain *mbp = &rqp->sr_rq;
 360         struct iconv_drv *dp = rqp->sr_vc->vc_toserver;
 361         u_char c;
 362         int error;
 363
 364         while (*src) {
 365                 iconv_convmem(dp, &c, src++, 1);
 366                 error = mb_put_uint16le(mbp, c);
 367                 if (error)
 368                         return error;
 369         }
 370         return mb_put_uint16le(mbp, 0);
 371 }
 372
 373 /*
 374  * Create a kernel process/thread/whatever.  It shares it's address space
 375  * with proc0 - ie: kernel only.
 376  *
 377  * XXX only the SMB protocol uses this, we should convert this mess to a
 378  * pure thread when possible.
 379  */
 380 int
 381 smb_kthread_create(void (*func)(void *), void *arg,
 382                    struct proc **newpp, int flags, const char *fmt, ...)
 383 {
 384         int error;
 385         __va_list ap;
 386         struct proc *p2;
 387         struct lwp *lp2;
 388
 389         error = fork1(&lwp0, RFMEM | RFFDG | RFPROC | flags, &p2);
 390         if (error)
 391                 return error;
 392
 393         /* save a global descriptor, if desired */
 394         if (newpp != NULL)
 395                 *newpp = p2;
 396
 397         /* this is a non-swapped system process */
 398         p2->p_flags |= P_SYSTEM;
 399         p2->p_sigacts->ps_flag |= PS_NOCLDWAIT;
 400
 401         lp2 = ONLY_LWP_IN_PROC(p2);
 402
 403         /* set up arg0 for 'ps', et al */
 404         __va_start(ap, fmt);
 405         kvsnprintf(p2->p_comm, sizeof(p2->p_comm), fmt, ap);
 406         __va_end(ap);
 407
 408         lp2->lwp_thread->td_ucred = crhold(proc0.p_ucred);
 409
 410         /* call the processes' main()... */
 411         cpu_set_fork_handler(lp2,
 412                              (void (*)(void *, struct trapframe *))func, arg);
 413         start_forked_proc(&lwp0, p2);
 414
 415         return 0;
 416 }
 417
 418 void
 419 smb_kthread_exit(void)
 420 {
 421         exit1(0);
 422 }
 423
 424 /*
 425  * smb_sleep() icky compat routine.  Leave the token held through the tsleep
 426  * to interlock against the sleep.  Remember that the token could be lost
 427  * since we blocked, so reget or release as appropriate.
 428  */
 429 int
 430 smb_sleep(void *chan, struct smb_slock *sl, int slpflags, const char *wmesg, int timo)
 431 {
 432         int error;
 433
 434         if (sl) {
 435                 tsleep_interlock(chan, slpflags);
 436                 smb_sl_unlock(sl);
 437                 error = tsleep(chan, slpflags | PINTERLOCKED, wmesg, timo);
 438                 if ((slpflags & PDROP) == 0)
 439                         smb_sl_lock(sl);
 440         } else {
 441                 error = tsleep(chan, slpflags, wmesg, timo);
 442         }
 443         return error;
 444 }
 445