smb_subr.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2000-2001 Boris Popov
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  */
   28 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD: releng/12.0/sys/netsmb/smb_subr.c 326272 2017-11-27 15:23:17Z pfg $");
   31 
   32 #include <sys/param.h>
   33 #include <sys/systm.h>
   34 #include <sys/endian.h>
   35 #include <sys/kernel.h>
   36 #include <sys/malloc.h>
   37 #include <sys/proc.h>
   38 #include <sys/lock.h>
   39 #include <sys/sysctl.h>
   40 #include <sys/socket.h>
   41 #include <sys/signalvar.h>
   42 #include <sys/mbuf.h>
   43 
   44 #include <sys/iconv.h>
   45 
   46 #include <netsmb/smb.h>
   47 #include <netsmb/smb_conn.h>
   48 #include <netsmb/smb_rq.h>
   49 #include <netsmb/smb_subr.h>
   50 
   51 static MALLOC_DEFINE(M_SMBDATA, "SMBDATA", "Misc netsmb data");
   52 static MALLOC_DEFINE(M_SMBSTR, "SMBSTR", "netsmb string data");
   53 MALLOC_DEFINE(M_SMBTEMP, "SMBTEMP", "Temp netsmb data");
   54 
   55 smb_unichar smb_unieol = 0;
   56 
   57 void
   58 smb_makescred(struct smb_cred *scred, struct thread *td, struct ucred *cred)
   59 {
   60         if (td) {
   61                 scred->scr_td = td;
   62                 scred->scr_cred = cred ? cred : td->td_ucred;
   63         } else {
   64                 scred->scr_td = NULL;
   65                 scred->scr_cred = cred ? cred : NULL;
   66         }
   67 }
   68 
   69 int
   70 smb_td_intr(struct thread *td)
   71 {
   72         struct proc *p;
   73         sigset_t tmpset;
   74 
   75         if (td == NULL)
   76                 return 0;
   77 
   78         p = td->td_proc;
   79         PROC_LOCK(p);
   80         tmpset = p->p_siglist;
   81         SIGSETOR(tmpset, td->td_siglist);
   82         SIGSETNAND(tmpset, td->td_sigmask);
   83         mtx_lock(&p->p_sigacts->ps_mtx);
   84         SIGSETNAND(tmpset, p->p_sigacts->ps_sigignore);
   85         mtx_unlock(&p->p_sigacts->ps_mtx);
   86         if (SIGNOTEMPTY(td->td_siglist) && SMB_SIGMASK(tmpset)) {
   87                 PROC_UNLOCK(p);
   88                 return EINTR;
   89         }
   90         PROC_UNLOCK(p);
   91         return 0;
   92 }
   93 
   94 char *
   95 smb_strdup(const char *s)
   96 {
   97         char *p;
   98         size_t 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, size_t maxlen)
  114 {
  115         char *p;
  116         int error;
  117 
  118         p = malloc(maxlen + 1, M_SMBSTR, M_WAITOK);
  119         error = copyinstr(s, p, maxlen + 1, NULL);
  120         if (error) {
  121                 free(p, M_SMBSTR);
  122                 return (NULL);
  123         }
  124         return p;
  125 }
  126 
  127 /*
  128  * duplicate memory block from a user space.
  129  */
  130 void *
  131 smb_memdupin(void *umem, size_t len)
  132 {
  133         char *p;
  134 
  135         if (len > 8 * 1024)
  136                 return NULL;
  137         p = malloc(len, M_SMBSTR, M_WAITOK);
  138         if (copyin(umem, p, len) == 0)
  139                 return p;
  140         free(p, M_SMBSTR);
  141         return NULL;
  142 }
  143 
  144 /*
  145  * duplicate memory block in the kernel space.
  146  */
  147 void *
  148 smb_memdup(const void *umem, int len)
  149 {
  150         char *p;
  151 
  152         if (len > 8 * 1024)
  153                 return NULL;
  154         p = malloc(len, M_SMBSTR, M_WAITOK);
  155         if (p == NULL)
  156                 return NULL;
  157         bcopy(umem, p, len);
  158         return p;
  159 }
  160 
  161 void
  162 smb_strfree(char *s)
  163 {
  164         free(s, M_SMBSTR);
  165 }
  166 
  167 void
  168 smb_memfree(void *s)
  169 {
  170         free(s, M_SMBSTR);
  171 }
  172 
  173 void *
  174 smb_zmalloc(size_t size, struct malloc_type *type, int flags)
  175 {
  176 
  177         return malloc(size, type, flags | M_ZERO);
  178 }
  179 
  180 void
  181 smb_strtouni(u_int16_t *dst, const char *src)
  182 {
  183         while (*src) {
  184                 *dst++ = htole16(*src++);
  185         }
  186         *dst = 0;
  187 }
  188 
  189 #ifdef SMB_SOCKETDATA_DEBUG
  190 void
  191 m_dumpm(struct mbuf *m) {
  192         char *p;
  193         size_t len;
  194         printf("d=");
  195         while(m) {
  196                 p=mtod(m,char *);
  197                 len=m->m_len;
  198                 printf("(%zu)",len);
  199                 while(len--){
  200                         printf("%02x ",((int)*(p++)) & 0xff);
  201                 }
  202                 m=m->m_next;
  203         }
  204         printf("\n");
  205 }
  206 #endif
  207 
  208 int
  209 smb_maperror(int eclass, int eno)
  210 {
  211         if (eclass == 0 && eno == 0)
  212                 return 0;
  213         switch (eclass) {
  214             case ERRDOS:
  215                 switch (eno) {
  216                     case ERRbadfunc:
  217                     case ERRbadmcb:
  218                     case ERRbadenv:
  219                     case ERRbadformat:
  220                     case ERRrmuns:
  221                         return EINVAL;
  222                     case ERRbadfile:
  223                     case ERRbadpath:
  224                     case ERRremcd:
  225                     case 66:            /* nt returns it when share not available */
  226                     case 67:            /* observed from nt4sp6 when sharename wrong */
  227                         return ENOENT;
  228                     case ERRnofids:
  229                         return EMFILE;
  230                     case ERRnoaccess:
  231                     case ERRbadshare:
  232                         return EACCES;
  233                     case ERRbadfid:
  234                         return EBADF;
  235                     case ERRnomem:
  236                         return ENOMEM;  /* actually remote no mem... */
  237                     case ERRbadmem:
  238                         return EFAULT;
  239                     case ERRbadaccess:
  240                         return EACCES;
  241                     case ERRbaddata:
  242                         return E2BIG;
  243                     case ERRbaddrive:
  244                     case ERRnotready:   /* nt */
  245                         return ENXIO;
  246                     case ERRdiffdevice:
  247                         return EXDEV;
  248                     case ERRnofiles:
  249                         return 0;       /* eeof ? */
  250                         return ETXTBSY;
  251                     case ERRlock:
  252                         return EDEADLK;
  253                     case ERRfilexists:
  254                         return EEXIST;
  255                     case 123:           /* dunno what is it, but samba maps as noent */
  256                         return ENOENT;
  257                     case 145:           /* samba */
  258                         return ENOTEMPTY;
  259                     case ERRnotlocked:
  260                         return 0;       /* file become unlocked */
  261                     case 183:
  262                         return EEXIST;
  263                     case ERRquota:
  264                         return EDQUOT;
  265                 }
  266                 break;
  267             case ERRSRV:
  268                 switch (eno) {
  269                     case ERRerror:
  270                         return EINVAL;
  271                     case ERRbadpw:
  272                     case ERRpasswordExpired:
  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 ERRaccountExpired:
  284                     case ERRbadClient:
  285                     case ERRbadLogonTime:
  286                         return EPERM;
  287                     case ERRnosupport:
  288                         return EBADRPC;
  289                 }
  290                 break;
  291             case ERRHRD:
  292                 switch (eno) {
  293                     case ERRnowrite:
  294                         return EROFS;
  295                     case ERRbadunit:
  296                         return ENODEV;
  297                     case ERRnotready:
  298                     case ERRbadcmd:
  299                     case ERRdata:
  300                         return EIO;
  301                     case ERRbadreq:
  302                         return EBADRPC;
  303                     case ERRbadshare:
  304                         return ETXTBSY;
  305                     case ERRlock:
  306                         return EDEADLK;
  307                 }
  308                 break;
  309         }
  310         SMBERROR("Unmapped error %d:%d\n", eclass, eno);
  311         return EBADRPC;
  312 }
  313 
  314 static int
  315 smb_copy_iconv(struct mbchain *mbp, c_caddr_t src, caddr_t dst,
  316     size_t *srclen, size_t *dstlen)
  317 {
  318         int error;
  319         size_t inlen = *srclen, outlen = *dstlen;
  320 
  321         error = iconv_conv((struct iconv_drv*)mbp->mb_udata, &src, &inlen,
  322             &dst, &outlen);
  323         if (inlen != *srclen || outlen != *dstlen) {
  324                 *srclen -= inlen;
  325                 *dstlen -= outlen;
  326                 return 0;
  327         } else
  328                 return error;
  329 }
  330 
  331 int
  332 smb_put_dmem(struct mbchain *mbp, struct smb_vc *vcp, const char *src,
  333         size_t size, int caseopt)
  334 {
  335         struct iconv_drv *dp = vcp->vc_toserver;
  336 
  337         if (size == 0)
  338                 return 0;
  339         if (dp == NULL) {
  340                 return mb_put_mem(mbp, src, size, MB_MSYSTEM);
  341         }
  342         mbp->mb_copy = smb_copy_iconv;
  343         mbp->mb_udata = dp;
  344         if (SMB_UNICODE_STRINGS(vcp))
  345                 mb_put_padbyte(mbp);
  346         return mb_put_mem(mbp, src, size, MB_MCUSTOM);
  347 }
  348 
  349 int
  350 smb_put_dstring(struct mbchain *mbp, struct smb_vc *vcp, const char *src,
  351         int caseopt)
  352 {
  353         int error;
  354 
  355         error = smb_put_dmem(mbp, vcp, src, strlen(src), caseopt);
  356         if (error)
  357                 return error;
  358         if (SMB_UNICODE_STRINGS(vcp))
  359                 return mb_put_uint16le(mbp, 0);
  360         return mb_put_uint8(mbp, 0);
  361 }
  362 
  363 int
  364 smb_put_asunistring(struct smb_rq *rqp, const char *src)
  365 {
  366         struct mbchain *mbp = &rqp->sr_rq;
  367         struct iconv_drv *dp = rqp->sr_vc->vc_toserver;
  368         u_char c;
  369         int error;
  370 
  371         while (*src) {
  372                 iconv_convmem(dp, &c, src++, 1);
  373                 error = mb_put_uint16le(mbp, c);
  374                 if (error)
  375                         return error;
  376         }
  377         return mb_put_uint16le(mbp, 0);
  378 }
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FreeBSD/Linux Kernel Cross Reference sys/netsmb/smb_subr.c

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