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  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  */
   26 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD: releng/9.2/sys/netsmb/smb_subr.c 249132 2013-04-05 08:22:11Z mav $");
   29 
   30 #include <sys/param.h>
   31 #include <sys/systm.h>
   32 #include <sys/endian.h>
   33 #include <sys/kernel.h>
   34 #include <sys/malloc.h>
   35 #include <sys/proc.h>
   36 #include <sys/lock.h>
   37 #include <sys/sysctl.h>
   38 #include <sys/socket.h>
   39 #include <sys/signalvar.h>
   40 #include <sys/mbuf.h>
   41 
   42 #include <sys/iconv.h>
   43 
   44 #include <netsmb/smb.h>
   45 #include <netsmb/smb_conn.h>
   46 #include <netsmb/smb_rq.h>
   47 #include <netsmb/smb_subr.h>
   48 
   49 static MALLOC_DEFINE(M_SMBDATA, "SMBDATA", "Misc netsmb data");
   50 static MALLOC_DEFINE(M_SMBSTR, "SMBSTR", "netsmb string data");
   51 MALLOC_DEFINE(M_SMBTEMP, "SMBTEMP", "Temp netsmb data");
   52 
   53 smb_unichar smb_unieol = 0;
   54 
   55 void
   56 smb_makescred(struct smb_cred *scred, struct thread *td, struct ucred *cred)
   57 {
   58         if (td) {
   59                 scred->scr_td = td;
   60                 scred->scr_cred = cred ? cred : td->td_ucred;
   61         } else {
   62                 scred->scr_td = NULL;
   63                 scred->scr_cred = cred ? cred : NULL;
   64         }
   65 }
   66 
   67 int
   68 smb_td_intr(struct thread *td)
   69 {
   70         struct proc *p;
   71         sigset_t tmpset;
   72 
   73         if (td == NULL)
   74                 return 0;
   75 
   76         p = td->td_proc;
   77         PROC_LOCK(p);
   78         tmpset = p->p_siglist;
   79         SIGSETOR(tmpset, td->td_siglist);
   80         SIGSETNAND(tmpset, td->td_sigmask);
   81         mtx_lock(&p->p_sigacts->ps_mtx);
   82         SIGSETNAND(tmpset, p->p_sigacts->ps_sigignore);
   83         mtx_unlock(&p->p_sigacts->ps_mtx);
   84         if (SIGNOTEMPTY(td->td_siglist) && SMB_SIGMASK(tmpset)) {
   85                 PROC_UNLOCK(p);
   86                 return EINTR;
   87         }
   88         PROC_UNLOCK(p);
   89         return 0;
   90 }
   91 
   92 char *
   93 smb_strdup(const char *s)
   94 {
   95         char *p;
   96         size_t len;
   97 
   98         len = s ? strlen(s) + 1 : 1;
   99         p = malloc(len, M_SMBSTR, M_WAITOK);
  100         if (s)
  101                 bcopy(s, p, len);
  102         else
  103                 *p = 0;
  104         return p;
  105 }
  106 
  107 /*
  108  * duplicate string from a user space.
  109  */
  110 char *
  111 smb_strdupin(char *s, size_t maxlen)
  112 {
  113         char *p, bt;
  114         int error;
  115         size_t len;
  116 
  117         len = 0;
  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         error = copyin(s, p, len);
  129         if (error) {
  130                 free(p, M_SMBSTR);
  131                 return (NULL);
  132         }
  133         return p;
  134 }
  135 
  136 /*
  137  * duplicate memory block from a user space.
  138  */
  139 void *
  140 smb_memdupin(void *umem, size_t len)
  141 {
  142         char *p;
  143 
  144         if (len > 8 * 1024)
  145                 return NULL;
  146         p = malloc(len, M_SMBSTR, M_WAITOK);
  147         if (copyin(umem, p, len) == 0)
  148                 return p;
  149         free(p, M_SMBSTR);
  150         return NULL;
  151 }
  152 
  153 /*
  154  * duplicate memory block in the kernel space.
  155  */
  156 void *
  157 smb_memdup(const void *umem, int len)
  158 {
  159         char *p;
  160 
  161         if (len > 8 * 1024)
  162                 return NULL;
  163         p = malloc(len, M_SMBSTR, M_WAITOK);
  164         if (p == NULL)
  165                 return NULL;
  166         bcopy(umem, p, len);
  167         return p;
  168 }
  169 
  170 void
  171 smb_strfree(char *s)
  172 {
  173         free(s, M_SMBSTR);
  174 }
  175 
  176 void
  177 smb_memfree(void *s)
  178 {
  179         free(s, M_SMBSTR);
  180 }
  181 
  182 void *
  183 smb_zmalloc(size_t size, struct malloc_type *type, int flags)
  184 {
  185 
  186         return malloc(size, type, flags | M_ZERO);
  187 }
  188 
  189 void
  190 smb_strtouni(u_int16_t *dst, const char *src)
  191 {
  192         while (*src) {
  193                 *dst++ = htole16(*src++);
  194         }
  195         *dst = 0;
  196 }
  197 
  198 #ifdef SMB_SOCKETDATA_DEBUG
  199 void
  200 m_dumpm(struct mbuf *m) {
  201         char *p;
  202         size_t len;
  203         printf("d=");
  204         while(m) {
  205                 p=mtod(m,char *);
  206                 len=m->m_len;
  207                 printf("(%zu)",len);
  208                 while(len--){
  209                         printf("%02x ",((int)*(p++)) & 0xff);
  210                 }
  211                 m=m->m_next;
  212         };
  213         printf("\n");
  214 }
  215 #endif
  216 
  217 int
  218 smb_maperror(int eclass, int eno)
  219 {
  220         if (eclass == 0 && eno == 0)
  221                 return 0;
  222         switch (eclass) {
  223             case ERRDOS:
  224                 switch (eno) {
  225                     case ERRbadfunc:
  226                     case ERRbadmcb:
  227                     case ERRbadenv:
  228                     case ERRbadformat:
  229                     case ERRrmuns:
  230                         return EINVAL;
  231                     case ERRbadfile:
  232                     case ERRbadpath:
  233                     case ERRremcd:
  234                     case 66:            /* nt returns it when share not available */
  235                     case 67:            /* observed from nt4sp6 when sharename wrong */
  236                         return ENOENT;
  237                     case ERRnofids:
  238                         return EMFILE;
  239                     case ERRnoaccess:
  240                     case ERRbadshare:
  241                         return EACCES;
  242                     case ERRbadfid:
  243                         return EBADF;
  244                     case ERRnomem:
  245                         return ENOMEM;  /* actually remote no mem... */
  246                     case ERRbadmem:
  247                         return EFAULT;
  248                     case ERRbadaccess:
  249                         return EACCES;
  250                     case ERRbaddata:
  251                         return E2BIG;
  252                     case ERRbaddrive:
  253                     case ERRnotready:   /* nt */
  254                         return ENXIO;
  255                     case ERRdiffdevice:
  256                         return EXDEV;
  257                     case ERRnofiles:
  258                         return 0;       /* eeof ? */
  259                         return ETXTBSY;
  260                     case ERRlock:
  261                         return EDEADLK;
  262                     case ERRfilexists:
  263                         return EEXIST;
  264                     case 123:           /* dunno what is it, but samba maps as noent */
  265                         return ENOENT;
  266                     case 145:           /* samba */
  267                         return ENOTEMPTY;
  268                     case ERRnotlocked:
  269                         return 0;       /* file become unlocked */
  270                     case 183:
  271                         return EEXIST;
  272                     case ERRquota:
  273                         return EDQUOT;
  274                 }
  275                 break;
  276             case ERRSRV:
  277                 switch (eno) {
  278                     case ERRerror:
  279                         return EINVAL;
  280                     case ERRbadpw:
  281                     case ERRpasswordExpired:
  282                         return EAUTH;
  283                     case ERRaccess:
  284                         return EACCES;
  285                     case ERRinvnid:
  286                         return ENETRESET;
  287                     case ERRinvnetname:
  288                         SMBERROR("NetBIOS name is invalid\n");
  289                         return EAUTH;
  290                     case 3:             /* reserved and returned */
  291                         return EIO;
  292                     case ERRaccountExpired:
  293                     case ERRbadClient:
  294                     case ERRbadLogonTime:
  295                         return EPERM;
  296                     case ERRnosupport:
  297                         return EBADRPC;
  298                 }
  299                 break;
  300             case ERRHRD:
  301                 switch (eno) {
  302                     case ERRnowrite:
  303                         return EROFS;
  304                     case ERRbadunit:
  305                         return ENODEV;
  306                     case ERRnotready:
  307                     case ERRbadcmd:
  308                     case ERRdata:
  309                         return EIO;
  310                     case ERRbadreq:
  311                         return EBADRPC;
  312                     case ERRbadshare:
  313                         return ETXTBSY;
  314                     case ERRlock:
  315                         return EDEADLK;
  316                 }
  317                 break;
  318         }
  319         SMBERROR("Unmapped error %d:%d\n", eclass, eno);
  320         return EBADRPC;
  321 }
  322 
  323 static int
  324 smb_copy_iconv(struct mbchain *mbp, c_caddr_t src, caddr_t dst,
  325     size_t *srclen, size_t *dstlen)
  326 {
  327         int error;
  328         size_t inlen = *srclen, outlen = *dstlen;
  329 
  330         error = iconv_conv((struct iconv_drv*)mbp->mb_udata, &src, &inlen,
  331             &dst, &outlen);
  332         if (inlen != *srclen || outlen != *dstlen) {
  333                 *srclen -= inlen;
  334                 *dstlen -= outlen;
  335                 return 0;
  336         } else
  337                 return error;
  338 }
  339 
  340 int
  341 smb_put_dmem(struct mbchain *mbp, struct smb_vc *vcp, const char *src,
  342         size_t size, int caseopt)
  343 {
  344         struct iconv_drv *dp = vcp->vc_toserver;
  345 
  346         if (size == 0)
  347                 return 0;
  348         if (dp == NULL) {
  349                 return mb_put_mem(mbp, src, size, MB_MSYSTEM);
  350         }
  351         mbp->mb_copy = smb_copy_iconv;
  352         mbp->mb_udata = dp;
  353         if (SMB_UNICODE_STRINGS(vcp))
  354                 mb_put_padbyte(mbp);
  355         return mb_put_mem(mbp, src, size, MB_MCUSTOM);
  356 }
  357 
  358 int
  359 smb_put_dstring(struct mbchain *mbp, struct smb_vc *vcp, const char *src,
  360         int caseopt)
  361 {
  362         int error;
  363 
  364         error = smb_put_dmem(mbp, vcp, src, strlen(src), caseopt);
  365         if (error)
  366                 return error;
  367         if (SMB_UNICODE_STRINGS(vcp))
  368                 return mb_put_uint16le(mbp, 0);
  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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