The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/netsmb/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/malloc.h>
   41 #include <sys/proc.h>
   42 #include <sys/lock.h>
   43 #include <sys/sysctl.h>
   44 #include <sys/socket.h>
   45 #include <sys/signalvar.h>
   46 #include <sys/mbuf.h>
   47 
   48 #include <sys/iconv.h>
   49 
   50 #include <netsmb/smb.h>
   51 #include <netsmb/smb_conn.h>
   52 #include <netsmb/smb_rq.h>
   53 #include <netsmb/smb_subr.h>
   54 
   55 MALLOC_DEFINE(M_SMBDATA, "SMBDATA", "Misc netsmb data");
   56 MALLOC_DEFINE(M_SMBSTR, "SMBSTR", "netsmb string data");
   57 MALLOC_DEFINE(M_SMBTEMP, "SMBTEMP", "Temp netsmb data");
   58 
   59 smb_unichar smb_unieol = 0;
   60 
   61 void
   62 smb_makescred(struct smb_cred *scred, struct thread *td, struct ucred *cred)
   63 {
   64         if (td) {
   65                 scred->scr_td = td;
   66                 scred->scr_cred = cred ? cred : td->td_ucred;
   67         } else {
   68                 scred->scr_td = NULL;
   69                 scred->scr_cred = cred ? cred : NULL;
   70         }
   71 }
   72 
   73 int
   74 smb_td_intr(struct thread *td)
   75 {
   76         struct proc *p;
   77         sigset_t tmpset;
   78 
   79         if (td == NULL)
   80                 return 0;
   81 
   82         p = td->td_proc;
   83         PROC_LOCK(p);
   84         tmpset = p->p_siglist;
   85         SIGSETOR(tmpset, td->td_siglist);
   86         SIGSETNAND(tmpset, td->td_sigmask);
   87         mtx_lock(&p->p_sigacts->ps_mtx);
   88         SIGSETNAND(tmpset, p->p_sigacts->ps_sigignore);
   89         mtx_unlock(&p->p_sigacts->ps_mtx);
   90         if (SIGNOTEMPTY(td->td_siglist) && SMB_SIGMASK(tmpset)) {
   91                 PROC_UNLOCK(p);
   92                 return EINTR;
   93         }
   94         PROC_UNLOCK(p);
   95         return 0;
   96 }
   97 
   98 char *
   99 smb_strdup(const char *s)
  100 {
  101         char *p;
  102         int len;
  103 
  104         len = s ? strlen(s) + 1 : 1;
  105         p = malloc(len, M_SMBSTR, M_WAITOK);
  106         if (s)
  107                 bcopy(s, p, len);
  108         else
  109                 *p = 0;
  110         return p;
  111 }
  112 
  113 /*
  114  * duplicate string from a user space.
  115  */
  116 char *
  117 smb_strdupin(char *s, int maxlen)
  118 {
  119         char *p, bt;
  120         int error, len = 0;
  121 
  122         for (p = s; ;p++) {
  123                 if (copyin(p, &bt, 1))
  124                         return NULL;
  125                 len++;
  126                 if (maxlen && len > maxlen)
  127                         return NULL;
  128                 if (bt == 0)
  129                         break;
  130         }
  131         p = malloc(len, M_SMBSTR, M_WAITOK);
  132         error = copyin(s, p, len);
  133         if (error) {
  134                 free(p, M_SMBSTR);
  135                 return (NULL);
  136         }
  137         return p;
  138 }
  139 
  140 /*
  141  * duplicate memory block from a user space.
  142  */
  143 void *
  144 smb_memdupin(void *umem, int len)
  145 {
  146         char *p;
  147 
  148         if (len > 8 * 1024)
  149                 return NULL;
  150         p = malloc(len, M_SMBSTR, M_WAITOK);
  151         if (copyin(umem, p, len) == 0)
  152                 return p;
  153         free(p, M_SMBSTR);
  154         return NULL;
  155 }
  156 
  157 /*
  158  * duplicate memory block in the kernel space.
  159  */
  160 void *
  161 smb_memdup(const void *umem, int len)
  162 {
  163         char *p;
  164 
  165         if (len > 8 * 1024)
  166                 return NULL;
  167         p = malloc(len, M_SMBSTR, M_WAITOK);
  168         if (p == NULL)
  169                 return NULL;
  170         bcopy(umem, p, len);
  171         return p;
  172 }
  173 
  174 void
  175 smb_strfree(char *s)
  176 {
  177         free(s, M_SMBSTR);
  178 }
  179 
  180 void
  181 smb_memfree(void *s)
  182 {
  183         free(s, M_SMBSTR);
  184 }
  185 
  186 void *
  187 smb_zmalloc(unsigned long size, struct malloc_type *type, int flags)
  188 {
  189 
  190         return malloc(size, type, flags | M_ZERO);
  191 }
  192 
  193 void
  194 smb_strtouni(u_int16_t *dst, const char *src)
  195 {
  196         while (*src) {
  197                 *dst++ = htole16(*src++);
  198         }
  199         *dst = 0;
  200 }
  201 
  202 #ifdef SMB_SOCKETDATA_DEBUG
  203 void
  204 m_dumpm(struct mbuf *m) {
  205         char *p;
  206         int len;
  207         printf("d=");
  208         while(m) {
  209                 p=mtod(m,char *);
  210                 len=m->m_len;
  211                 printf("(%d)",len);
  212                 while(len--){
  213                         printf("%02x ",((int)*(p++)) & 0xff);
  214                 }
  215                 m=m->m_next;
  216         };
  217         printf("\n");
  218 }
  219 #endif
  220 
  221 int
  222 smb_maperror(int eclass, int eno)
  223 {
  224         if (eclass == 0 && eno == 0)
  225                 return 0;
  226         switch (eclass) {
  227             case ERRDOS:
  228                 switch (eno) {
  229                     case ERRbadfunc:
  230                     case ERRbadmcb:
  231                     case ERRbadenv:
  232                     case ERRbadformat:
  233                     case ERRrmuns:
  234                         return EINVAL;
  235                     case ERRbadfile:
  236                     case ERRbadpath:
  237                     case ERRremcd:
  238                     case 66:            /* nt returns it when share not available */
  239                     case 67:            /* observed from nt4sp6 when sharename wrong */
  240                         return ENOENT;
  241                     case ERRnofids:
  242                         return EMFILE;
  243                     case ERRnoaccess:
  244                     case ERRbadshare:
  245                         return EACCES;
  246                     case ERRbadfid:
  247                         return EBADF;
  248                     case ERRnomem:
  249                         return ENOMEM;  /* actually remote no mem... */
  250                     case ERRbadmem:
  251                         return EFAULT;
  252                     case ERRbadaccess:
  253                         return EACCES;
  254                     case ERRbaddata:
  255                         return E2BIG;
  256                     case ERRbaddrive:
  257                     case ERRnotready:   /* nt */
  258                         return ENXIO;
  259                     case ERRdiffdevice:
  260                         return EXDEV;
  261                     case ERRnofiles:
  262                         return 0;       /* eeof ? */
  263                         return ETXTBSY;
  264                     case ERRlock:
  265                         return EDEADLK;
  266                     case ERRfilexists:
  267                         return EEXIST;
  268                     case 123:           /* dunno what is it, but samba maps as noent */
  269                         return ENOENT;
  270                     case 145:           /* samba */
  271                         return ENOTEMPTY;
  272                     case ERRnotlocked:
  273                         return 0;       /* file become unlocked */
  274                     case 183:
  275                         return EEXIST;
  276                     case ERRquota:
  277                         return EDQUOT;
  278                 }
  279                 break;
  280             case ERRSRV:
  281                 switch (eno) {
  282                     case ERRerror:
  283                         return EINVAL;
  284                     case ERRbadpw:
  285                     case ERRpasswordExpired:
  286                         return EAUTH;
  287                     case ERRaccess:
  288                         return EACCES;
  289                     case ERRinvnid:
  290                         return ENETRESET;
  291                     case ERRinvnetname:
  292                         SMBERROR("NetBIOS name is invalid\n");
  293                         return EAUTH;
  294                     case 3:             /* reserved and returned */
  295                         return EIO;
  296                     case ERRaccountExpired:
  297                     case ERRbadClient:
  298                     case ERRbadLogonTime:
  299                         return EPERM;
  300                     case ERRnosupport:
  301                         return EBADRPC;
  302                 }
  303                 break;
  304             case ERRHRD:
  305                 switch (eno) {
  306                     case ERRnowrite:
  307                         return EROFS;
  308                     case ERRbadunit:
  309                         return ENODEV;
  310                     case ERRnotready:
  311                     case ERRbadcmd:
  312                     case ERRdata:
  313                         return EIO;
  314                     case ERRbadreq:
  315                         return EBADRPC;
  316                     case ERRbadshare:
  317                         return ETXTBSY;
  318                     case ERRlock:
  319                         return EDEADLK;
  320                 }
  321                 break;
  322         }
  323         SMBERROR("Unmapped error %d:%d\n", eclass, eno);
  324         return EBADRPC;
  325 }
  326 
  327 static int
  328 smb_copy_iconv(struct mbchain *mbp, c_caddr_t src, caddr_t dst,
  329     size_t *srclen, size_t *dstlen)
  330 {
  331         int error;
  332         size_t inlen = *srclen, outlen = *dstlen;
  333 
  334         error = iconv_conv((struct iconv_drv*)mbp->mb_udata, &src, &inlen,
  335             &dst, &outlen);
  336         if (inlen != *srclen || outlen != *dstlen) {
  337                 *srclen -= inlen;
  338                 *dstlen -= outlen;
  339                 return 0;
  340         } else
  341                 return error;
  342 }
  343 
  344 int
  345 smb_put_dmem(struct mbchain *mbp, struct smb_vc *vcp, const char *src,
  346         int size, int caseopt)
  347 {
  348         struct iconv_drv *dp = vcp->vc_toserver;
  349 
  350         if (size == 0)
  351                 return 0;
  352         if (dp == NULL) {
  353                 return mb_put_mem(mbp, src, size, MB_MSYSTEM);
  354         }
  355         mbp->mb_copy = smb_copy_iconv;
  356         mbp->mb_udata = dp;
  357         return mb_put_mem(mbp, src, size, MB_MCUSTOM);
  358 }
  359 
  360 int
  361 smb_put_dstring(struct mbchain *mbp, struct smb_vc *vcp, const char *src,
  362         int caseopt)
  363 {
  364         int error;
  365 
  366         error = smb_put_dmem(mbp, vcp, src, strlen(src), caseopt);
  367         if (error)
  368                 return error;
  369         return mb_put_uint8(mbp, 0);
  370 }
  371 
  372 int
  373 smb_put_asunistring(struct smb_rq *rqp, const char *src)
  374 {
  375         struct mbchain *mbp = &rqp->sr_rq;
  376         struct iconv_drv *dp = rqp->sr_vc->vc_toserver;
  377         u_char c;
  378         int error;
  379 
  380         while (*src) {
  381                 iconv_convmem(dp, &c, src++, 1);
  382                 error = mb_put_uint16le(mbp, c);
  383                 if (error)
  384                         return error;
  385         }
  386         return mb_put_uint16le(mbp, 0);
  387 }

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