smb_subr.c

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    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 
   33 #include <sys/cdefs.h>
   34 __FBSDID("$FreeBSD$");
   35 
   36 #include <sys/param.h>
   37 #include <sys/systm.h>
   38 #include <sys/endian.h>
   39 #include <sys/kernel.h>
   40 #include <sys/kthread.h>
   41 #include <sys/malloc.h>
   42 #include <sys/mbuf.h>
   43 #include <sys/proc.h>
   44 #include <sys/lock.h>
   45 #include <sys/resourcevar.h>
   46 #include <sys/sysctl.h>
   47 #include <sys/socket.h>
   48 #include <sys/signalvar.h>
   49 #include <sys/wait.h>
   50 #include <sys/unistd.h>
   51 
   52 #include <machine/stdarg.h>
   53 
   54 #include <sys/iconv.h>
   55 
   56 #include <netsmb/smb.h>
   57 #include <netsmb/smb_conn.h>
   58 #include <netsmb/smb_rq.h>
   59 #include <netsmb/smb_subr.h>
   60 
   61 MALLOC_DEFINE(M_SMBDATA, "SMBDATA", "Misc netsmb data");
   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 proc *p, struct ucred *cred)
   69 {
   70         if (p) {
   71                 scred->scr_p = p;
   72                 scred->scr_cred = cred ? cred : p->p_ucred;
   73         } else {
   74                 scred->scr_p = NULL;
   75                 scred->scr_cred = cred ? cred : NULL;
   76         }
   77 }
   78 
   79 int
   80 smb_proc_intr(struct proc *p)
   81 {
   82         sigset_t tmpset;
   83 
   84         if (p == NULL)
   85                 return 0;
   86         tmpset = p->p_siglist;
   87         SIGSETNAND(tmpset, p->p_sigmask);
   88         SIGSETNAND(tmpset, p->p_sigignore);
   89         if (SIGNOTEMPTY(p->p_siglist) && 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 = malloc(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 = malloc(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 = malloc(len, M_SMBSTR, M_WAITOK);
  143         if (copyin(umem, p, len) == 0)
  144                 return p;
  145         free(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 = malloc(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         free(s, M_SMBSTR);
  170 }
  171 
  172 void
  173 smb_memfree(void *s)
  174 {
  175         free(s, M_SMBSTR);
  176 }
  177 
  178 void *
  179 smb_zmalloc(unsigned long size, struct malloc_type *type, int flags)
  180 {
  181 
  182         return malloc(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         printf("d=");
  200         while(m) {
  201                 p=mtod(m,char *);
  202                 len=m->m_len;
  203                 printf("(%d)",len);
  204                 while(len--){
  205                         printf("%02x ",((int)*(p++)) & 0xff);
  206                 }
  207                 m=m->m_next;
  208         };
  209         printf("\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                     case ERRquota:
  267                         return EDQUOT;
  268                 }
  269                 break;
  270             case ERRSRV:
  271                 switch (eno) {
  272                     case ERRerror:
  273                         return EINVAL;
  274                     case ERRbadpw:
  275                     case ERRpasswordExpired:
  276                         return EAUTH;
  277                     case ERRaccess:
  278                         return EACCES;
  279                     case ERRinvnid:
  280                         return ENETRESET;
  281                     case ERRinvnetname:
  282                         SMBERROR("NetBIOS name is invalid\n");
  283                         return EAUTH;
  284                     case 3:             /* reserved and returned */
  285                         return EIO;
  286                     case ERRaccountExpired:
  287                     case ERRbadClient:
  288                     case ERRbadLogonTime:
  289                         return EPERM;
  290                     case ERRnosupport:
  291                         return EBADRPC;
  292                 }
  293                 break;
  294             case ERRHRD:
  295                 switch (eno) {
  296                     case ERRnowrite:
  297                         return EROFS;
  298                     case ERRbadunit:
  299                         return ENODEV;
  300                     case ERRnotready:
  301                     case ERRbadcmd:
  302                     case ERRdata:
  303                         return EIO;
  304                     case ERRbadreq:
  305                         return EBADRPC;
  306                     case ERRbadshare:
  307                         return ETXTBSY;
  308                     case ERRlock:
  309                         return EDEADLK;
  310                 }
  311                 break;
  312         }
  313         SMBERROR("Unmapped error %d:%d\n", eclass, eno);
  314         return EBADRPC;
  315 }
  316 
  317 static int
  318 smb_copy_iconv(struct mbchain *mbp, c_caddr_t src, caddr_t dst, int len)
  319 {
  320         int outlen = len;
  321 
  322         return iconv_conv((struct iconv_drv*)mbp->mb_udata, &src, &len, &dst, &outlen);
  323 }
  324 
  325 int
  326 smb_put_dmem(struct mbchain *mbp, struct smb_vc *vcp, const char *src,
  327         int size, int caseopt)
  328 {
  329         struct iconv_drv *dp = vcp->vc_toserver;
  330 
  331         if (size == 0)
  332                 return 0;
  333         if (dp == NULL) {
  334                 return mb_put_mem(mbp, src, size, MB_MSYSTEM);
  335         }
  336         mbp->mb_copy = smb_copy_iconv;
  337         mbp->mb_udata = dp;
  338         return mb_put_mem(mbp, src, size, MB_MCUSTOM);
  339 }
  340 
  341 int
  342 smb_put_dstring(struct mbchain *mbp, struct smb_vc *vcp, const char *src,
  343         int caseopt)
  344 {
  345         int error;
  346 
  347         error = smb_put_dmem(mbp, vcp, src, strlen(src), caseopt);
  348         if (error)
  349                 return error;
  350         return mb_put_uint8(mbp, 0);
  351 }
  352 
  353 int
  354 smb_put_asunistring(struct smb_rq *rqp, const char *src)
  355 {
  356         struct mbchain *mbp = &rqp->sr_rq;
  357         struct iconv_drv *dp = rqp->sr_vc->vc_toserver;
  358         u_char c;
  359         int error;
  360 
  361         while (*src) {
  362                 iconv_convmem(dp, &c, src++, 1);
  363                 error = mb_put_uint16le(mbp, c);
  364                 if (error)
  365                         return error;
  366         }
  367         return mb_put_uint16le(mbp, 0);
  368 }
  369 
  370 int
  371 smb_checksmp(void)
  372 {
  373         size_t olen, plen;
  374         int name[2];
  375         int ncpu, error;
  376 
  377         name[0] = CTL_HW;
  378         name[1] = HW_NCPU;
  379         olen = sizeof(ncpu);
  380         error = kernel_sysctl(curproc, name, 2, &ncpu, &olen, NULL, 0, &plen);
  381         if (error)
  382                 return error;
  383 #ifndef SMP
  384         if (ncpu > 1) {
  385                 printf("error: module compiled without SMP support\n");
  386                 return EPERM;
  387         }
  388 #else
  389         if (ncpu < 2) {
  390                 printf("warning: only one CPU active on in SMP kernel ?\n");
  391         }
  392 #endif
  393         return 0;
  394 }
  395 
  396 /*
  397  * Create a kernel process/thread/whatever.  It shares it's address space
  398  * with proc0 - ie: kernel only.
  399  */
  400 int
  401 kthread_create2(void (*func)(void *), void *arg,
  402     struct proc **newpp, int flags, const char *fmt, ...)
  403 {
  404         int error;
  405         va_list ap;
  406         struct proc *p2;
  407 
  408         if (!proc0.p_stats || proc0.p_stats->p_start.tv_sec == 0) {
  409                 panic("kthread_create called too soon");
  410         }
  411 
  412         error = fork1(&proc0, RFMEM | RFFDG | RFPROC | flags, &p2);
  413         if (error)
  414                 return error;
  415 
  416         /* save a global descriptor, if desired */
  417         if (newpp != NULL)
  418                 *newpp = p2;
  419 
  420         /* this is a non-swapped system process */
  421         p2->p_flag |= P_INMEM | P_SYSTEM;
  422         p2->p_procsig->ps_flag |= PS_NOCLDWAIT;
  423         PHOLD(p2);
  424 
  425         /* set up arg0 for 'ps', et al */
  426         va_start(ap, fmt);
  427         vsnprintf(p2->p_comm, sizeof(p2->p_comm), fmt, ap);
  428         va_end(ap);
  429 
  430         /* call the processes' main()... */
  431         cpu_set_fork_handler(p2, func, arg);
  432 
  433         return 0;
  434 }
  435 
  436 int
  437 msleep(void *chan, struct simplelock *mtx, int pri, const char *wmesg, int timo)
  438 {
  439         int error;
  440 
  441         if (mtx)
  442                 simple_unlock(mtx);
  443         error = tsleep(chan, pri, wmesg, timo);
  444         if ((pri & PDROP) == 0 && mtx)
  445                 simple_lock(mtx);
  446         return error;
  447 }
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FreeBSD/Linux Kernel Cross Reference sys/netsmb/smb_subr.c

FreeBSD/Linux Kernel Cross Reference
sys/netsmb/smb_subr.c
