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_usr.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/11.2/sys/netsmb/smb_usr.c 298995 2016-05-03 18:05:43Z pfg $");
   29 
   30 #include <sys/param.h>
   31 #include <sys/malloc.h>
   32 #include <sys/kernel.h>
   33 #include <sys/systm.h>
   34 #include <sys/conf.h>
   35 #include <sys/proc.h>
   36 #include <sys/fcntl.h>
   37 #include <sys/socket.h>
   38 #include <sys/socketvar.h>
   39 #include <sys/sysctl.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 #include <netsmb/smb_dev.h>
   49 
   50 /*
   51  * helpers for nsmb device. Can be moved to the smb_dev.c file.
   52  */
   53 static void smb_usr_vcspec_free(struct smb_vcspec *spec);
   54 
   55 static int
   56 smb_usr_vc2spec(struct smbioc_ossn *dp, struct smb_vcspec *spec)
   57 {
   58         int flags = 0;
   59 
   60         bzero(spec, sizeof(*spec));
   61 
   62 #ifdef NETSMB_NO_ANON_USER
   63         if (dp->ioc_user[0] == 0)
   64                 return EINVAL;
   65 #endif
   66 
   67         if (dp->ioc_server == NULL)
   68                 return EINVAL;
   69         if (dp->ioc_localcs[0] == 0) {
   70                 SMBERROR("no local charset ?\n");
   71                 return EINVAL;
   72         }
   73 
   74         spec->sap = smb_memdupin(dp->ioc_server, dp->ioc_svlen);
   75         if (spec->sap == NULL)
   76                 return ENOMEM;
   77         if (dp->ioc_local) {
   78                 spec->lap = smb_memdupin(dp->ioc_local, dp->ioc_lolen);
   79                 if (spec->lap == NULL) {
   80                         smb_usr_vcspec_free(spec);
   81                         return ENOMEM;
   82                 }
   83         }
   84         spec->srvname = dp->ioc_srvname;
   85         spec->pass = dp->ioc_password;
   86         spec->domain = dp->ioc_workgroup;
   87         spec->username = dp->ioc_user;
   88         spec->mode = dp->ioc_mode;
   89         spec->rights = dp->ioc_rights;
   90         spec->owner = dp->ioc_owner;
   91         spec->group = dp->ioc_group;
   92         spec->localcs = dp->ioc_localcs;
   93         spec->servercs = dp->ioc_servercs;
   94         if (dp->ioc_opt & SMBVOPT_PRIVATE)
   95                 flags |= SMBV_PRIVATE;
   96         if (dp->ioc_opt & SMBVOPT_SINGLESHARE)
   97                 flags |= SMBV_PRIVATE | SMBV_SINGLESHARE;
   98         spec->flags = flags;
   99         return 0;
  100 }
  101 
  102 static void
  103 smb_usr_vcspec_free(struct smb_vcspec *spec)
  104 {
  105         if (spec->sap)
  106                 smb_memfree(spec->sap);
  107         if (spec->lap)
  108                 smb_memfree(spec->lap);
  109 }
  110 
  111 static int
  112 smb_usr_share2spec(struct smbioc_oshare *dp, struct smb_sharespec *spec)
  113 {
  114         bzero(spec, sizeof(*spec));
  115         spec->mode = dp->ioc_mode;
  116         spec->rights = dp->ioc_rights;
  117         spec->owner = dp->ioc_owner;
  118         spec->group = dp->ioc_group;
  119         spec->name = dp->ioc_share;
  120         spec->stype = dp->ioc_stype;
  121         spec->pass = dp->ioc_password;
  122         return 0;
  123 }
  124 
  125 int
  126 smb_usr_lookup(struct smbioc_lookup *dp, struct smb_cred *scred,
  127         struct smb_vc **vcpp, struct smb_share **sspp)
  128 {
  129         struct smb_vc *vcp = NULL;
  130         struct smb_vcspec vspec;                        /* XXX */
  131         struct smb_sharespec sspec, *sspecp = NULL;     /* XXX */
  132         int error;
  133 
  134         if (dp->ioc_level < SMBL_VC || dp->ioc_level > SMBL_SHARE)
  135                 return EINVAL;
  136         error = smb_usr_vc2spec(&dp->ioc_ssn, &vspec);
  137         if (error)
  138                 return error;
  139         if (dp->ioc_flags & SMBLK_CREATE)
  140                 vspec.flags |= SMBV_CREATE;
  141 
  142         if (dp->ioc_level >= SMBL_SHARE) {
  143                 error = smb_usr_share2spec(&dp->ioc_sh, &sspec);
  144                 if (error)
  145                         goto out;
  146                 sspecp = &sspec;
  147         }
  148         error = smb_sm_lookup(&vspec, sspecp, scred, &vcp);
  149         if (error == 0) {
  150                 *vcpp = vcp;
  151                 *sspp = vspec.ssp;
  152         }
  153 out:
  154         smb_usr_vcspec_free(&vspec);
  155         return error;
  156 }
  157 
  158 /*
  159  * Connect to the resource specified by smbioc_ossn structure.
  160  * It may either find an existing connection or try to establish a new one.
  161  * If no errors occurred smb_vc returned locked and referenced.
  162  */
  163 int
  164 smb_usr_opensession(struct smbioc_ossn *dp, struct smb_cred *scred,
  165         struct smb_vc **vcpp)
  166 {
  167         struct smb_vc *vcp = NULL;
  168         struct smb_vcspec vspec;
  169         int error;
  170 
  171         error = smb_usr_vc2spec(dp, &vspec);
  172         if (error)
  173                 return error;
  174         if (dp->ioc_opt & SMBVOPT_CREATE)
  175                 vspec.flags |= SMBV_CREATE;
  176 
  177         error = smb_sm_lookup(&vspec, NULL, scred, &vcp);
  178         smb_usr_vcspec_free(&vspec);
  179         return error;
  180 }
  181 
  182 int
  183 smb_usr_openshare(struct smb_vc *vcp, struct smbioc_oshare *dp,
  184         struct smb_cred *scred, struct smb_share **sspp)
  185 {
  186         struct smb_share *ssp;
  187         struct smb_sharespec shspec;
  188         int error;
  189 
  190         error = smb_usr_share2spec(dp, &shspec);
  191         if (error)
  192                 return error;
  193         error = smb_vc_lookupshare(vcp, &shspec, scred, &ssp);
  194         if (error == 0) {
  195                 *sspp = ssp;
  196                 return 0;
  197         }
  198         if ((dp->ioc_opt & SMBSOPT_CREATE) == 0)
  199                 return error;
  200         error = smb_share_create(vcp, &shspec, scred, &ssp);
  201         if (error)
  202                 return error;
  203         error = smb_smb_treeconnect(ssp, scred);
  204         if (error) {
  205                 smb_share_put(ssp, scred);
  206         } else
  207                 *sspp = ssp;
  208         return error;
  209 }
  210 
  211 int
  212 smb_usr_simplerequest(struct smb_share *ssp, struct smbioc_rq *dp,
  213         struct smb_cred *scred)
  214 {
  215         struct smb_rq *rqp;
  216         struct mbchain *mbp;
  217         struct mdchain *mdp;
  218         u_int8_t wc;
  219         u_int16_t bc;
  220         int error;
  221 
  222         switch (dp->ioc_cmd) {
  223             case SMB_COM_TRANSACTION2:
  224             case SMB_COM_TRANSACTION2_SECONDARY:
  225             case SMB_COM_CLOSE_AND_TREE_DISC:
  226             case SMB_COM_TREE_CONNECT:
  227             case SMB_COM_TREE_DISCONNECT:
  228             case SMB_COM_NEGOTIATE:
  229             case SMB_COM_SESSION_SETUP_ANDX:
  230             case SMB_COM_LOGOFF_ANDX:
  231             case SMB_COM_TREE_CONNECT_ANDX:
  232                 return EPERM;
  233         }
  234         rqp = malloc(sizeof(struct smb_rq), M_SMBTEMP, M_WAITOK);
  235         error = smb_rq_init(rqp, SSTOCP(ssp), dp->ioc_cmd, scred);
  236         if (error) {
  237                 free(rqp, M_SMBTEMP);
  238                 return error;
  239         }
  240         mbp = &rqp->sr_rq;
  241         smb_rq_wstart(rqp);
  242         error = mb_put_mem(mbp, dp->ioc_twords, dp->ioc_twc * 2, MB_MUSER);
  243         if (error)
  244                 goto bad;
  245         smb_rq_wend(rqp);
  246         smb_rq_bstart(rqp);
  247         error = mb_put_mem(mbp, dp->ioc_tbytes, dp->ioc_tbc, MB_MUSER);
  248         if (error)
  249                 goto bad;
  250         smb_rq_bend(rqp);
  251         error = smb_rq_simple(rqp);
  252         if (error)
  253                 goto bad;
  254         mdp = &rqp->sr_rp;
  255         md_get_uint8(mdp, &wc);
  256         dp->ioc_rwc = wc;
  257         wc *= 2;
  258         if (wc > dp->ioc_rpbufsz) {
  259                 error = EBADRPC;
  260                 goto bad;
  261         }
  262         error = md_get_mem(mdp, dp->ioc_rpbuf, wc, MB_MUSER);
  263         if (error)
  264                 goto bad;
  265         md_get_uint16le(mdp, &bc);
  266         if ((wc + bc) > dp->ioc_rpbufsz) {
  267                 error = EBADRPC;
  268                 goto bad;
  269         }
  270         dp->ioc_rbc = bc;
  271         error = md_get_mem(mdp, dp->ioc_rpbuf + wc, bc, MB_MUSER);
  272 bad:
  273         dp->ioc_errclass = rqp->sr_errclass;
  274         dp->ioc_serror = rqp->sr_serror;
  275         dp->ioc_error = rqp->sr_error;
  276         smb_rq_done(rqp);
  277         free(rqp, M_SMBTEMP);
  278         return error;
  279 
  280 }
  281 
  282 static int
  283 smb_cpdatain(struct mbchain *mbp, int len, caddr_t data)
  284 {
  285         int error;
  286 
  287         if (len == 0)
  288                 return 0;
  289         error = mb_init(mbp);
  290         if (error)
  291                 return error;
  292         return mb_put_mem(mbp, data, len, MB_MUSER);
  293 }
  294 
  295 int
  296 smb_usr_t2request(struct smb_share *ssp, struct smbioc_t2rq *dp,
  297         struct smb_cred *scred)
  298 {
  299         struct smb_t2rq *t2p;
  300         struct mdchain *mdp;
  301         int error, len;
  302 
  303         if (dp->ioc_setupcnt > 3)
  304                 return EINVAL;
  305         t2p = malloc(sizeof(struct smb_t2rq), M_SMBTEMP, M_WAITOK);
  306         error = smb_t2_init(t2p, SSTOCP(ssp), dp->ioc_setup[0], scred);
  307         if (error) {
  308                 free(t2p, M_SMBTEMP);
  309                 return error;
  310         }
  311         len = t2p->t2_setupcount = dp->ioc_setupcnt;
  312         if (len > 1)
  313                 t2p->t2_setupdata = dp->ioc_setup; 
  314         if (dp->ioc_name) {
  315                 t2p->t_name = smb_strdupin(dp->ioc_name, 128);
  316                 if (t2p->t_name == NULL) {
  317                         error = ENOMEM;
  318                         goto bad;
  319                 }
  320         }
  321         t2p->t2_maxscount = 0;
  322         t2p->t2_maxpcount = dp->ioc_rparamcnt;
  323         t2p->t2_maxdcount = dp->ioc_rdatacnt;
  324         error = smb_cpdatain(&t2p->t2_tparam, dp->ioc_tparamcnt, dp->ioc_tparam);
  325         if (error)
  326                 goto bad;
  327         error = smb_cpdatain(&t2p->t2_tdata, dp->ioc_tdatacnt, dp->ioc_tdata);
  328         if (error)
  329                 goto bad;
  330         error = smb_t2_request(t2p);
  331         if (error)
  332                 goto bad;
  333         mdp = &t2p->t2_rparam;
  334         if (mdp->md_top) {
  335                 len = m_fixhdr(mdp->md_top);
  336                 if (len > dp->ioc_rparamcnt) {
  337                         error = EMSGSIZE;
  338                         goto bad;
  339                 }
  340                 dp->ioc_rparamcnt = len;
  341                 error = md_get_mem(mdp, dp->ioc_rparam, len, MB_MUSER);
  342                 if (error)
  343                         goto bad;
  344         } else
  345                 dp->ioc_rparamcnt = 0;
  346         mdp = &t2p->t2_rdata;
  347         if (mdp->md_top) {
  348                 len = m_fixhdr(mdp->md_top);
  349                 if (len > dp->ioc_rdatacnt) {
  350                         error = EMSGSIZE;
  351                         goto bad;
  352                 }
  353                 dp->ioc_rdatacnt = len;
  354                 error = md_get_mem(mdp, dp->ioc_rdata, len, MB_MUSER);
  355         } else
  356                 dp->ioc_rdatacnt = 0;
  357 bad:
  358         if (t2p->t_name)
  359                 smb_strfree(t2p->t_name);
  360         smb_t2_done(t2p);
  361         free(t2p, M_SMBTEMP);
  362         return error;
  363 }

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