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/9.2/sys/netsmb/smb_usr.c 206361 2010-04-07 16:50:38Z joel $");
   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;
  131         struct smb_sharespec sspec, *sspecp = NULL;
  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 occured 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 rq, *rqp = &rq;
  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         error = smb_rq_init(rqp, SSTOCP(ssp), dp->ioc_cmd, scred);
  235         if (error)
  236                 return error;
  237         mbp = &rqp->sr_rq;
  238         smb_rq_wstart(rqp);
  239         error = mb_put_mem(mbp, dp->ioc_twords, dp->ioc_twc * 2, MB_MUSER);
  240         if (error)
  241                 goto bad;
  242         smb_rq_wend(rqp);
  243         smb_rq_bstart(rqp);
  244         error = mb_put_mem(mbp, dp->ioc_tbytes, dp->ioc_tbc, MB_MUSER);
  245         if (error)
  246                 goto bad;
  247         smb_rq_bend(rqp);
  248         error = smb_rq_simple(rqp);
  249         if (error)
  250                 goto bad;
  251         mdp = &rqp->sr_rp;
  252         md_get_uint8(mdp, &wc);
  253         dp->ioc_rwc = wc;
  254         wc *= 2;
  255         if (wc > dp->ioc_rpbufsz) {
  256                 error = EBADRPC;
  257                 goto bad;
  258         }
  259         error = md_get_mem(mdp, dp->ioc_rpbuf, wc, MB_MUSER);
  260         if (error)
  261                 goto bad;
  262         md_get_uint16le(mdp, &bc);
  263         if ((wc + bc) > dp->ioc_rpbufsz) {
  264                 error = EBADRPC;
  265                 goto bad;
  266         }
  267         dp->ioc_rbc = bc;
  268         error = md_get_mem(mdp, dp->ioc_rpbuf + wc, bc, MB_MUSER);
  269 bad:
  270         dp->ioc_errclass = rqp->sr_errclass;
  271         dp->ioc_serror = rqp->sr_serror;
  272         dp->ioc_error = rqp->sr_error;
  273         smb_rq_done(rqp);
  274         return error;
  275 
  276 }
  277 
  278 static int
  279 smb_cpdatain(struct mbchain *mbp, int len, caddr_t data)
  280 {
  281         int error;
  282 
  283         if (len == 0)
  284                 return 0;
  285         error = mb_init(mbp);
  286         if (error)
  287                 return error;
  288         return mb_put_mem(mbp, data, len, MB_MUSER);
  289 }
  290 
  291 int
  292 smb_usr_t2request(struct smb_share *ssp, struct smbioc_t2rq *dp,
  293         struct smb_cred *scred)
  294 {
  295         struct smb_t2rq t2, *t2p = &t2;
  296         struct mdchain *mdp;
  297         int error, len;
  298 
  299         if (dp->ioc_setupcnt > 3)
  300                 return EINVAL;
  301         error = smb_t2_init(t2p, SSTOCP(ssp), dp->ioc_setup[0], scred);
  302         if (error)
  303                 return error;
  304         len = t2p->t2_setupcount = dp->ioc_setupcnt;
  305         if (len > 1)
  306                 t2p->t2_setupdata = dp->ioc_setup; 
  307         if (dp->ioc_name) {
  308                 t2p->t_name = smb_strdupin(dp->ioc_name, 128);
  309                 if (t2p->t_name == NULL) {
  310                         error = ENOMEM;
  311                         goto bad;
  312                 }
  313         }
  314         t2p->t2_maxscount = 0;
  315         t2p->t2_maxpcount = dp->ioc_rparamcnt;
  316         t2p->t2_maxdcount = dp->ioc_rdatacnt;
  317         error = smb_cpdatain(&t2p->t2_tparam, dp->ioc_tparamcnt, dp->ioc_tparam);
  318         if (error)
  319                 goto bad;
  320         error = smb_cpdatain(&t2p->t2_tdata, dp->ioc_tdatacnt, dp->ioc_tdata);
  321         if (error)
  322                 goto bad;
  323         error = smb_t2_request(t2p);
  324         if (error)
  325                 goto bad;
  326         mdp = &t2p->t2_rparam;
  327         if (mdp->md_top) {
  328                 len = m_fixhdr(mdp->md_top);
  329                 if (len > dp->ioc_rparamcnt) {
  330                         error = EMSGSIZE;
  331                         goto bad;
  332                 }
  333                 dp->ioc_rparamcnt = len;
  334                 error = md_get_mem(mdp, dp->ioc_rparam, len, MB_MUSER);
  335                 if (error)
  336                         goto bad;
  337         } else
  338                 dp->ioc_rparamcnt = 0;
  339         mdp = &t2p->t2_rdata;
  340         if (mdp->md_top) {
  341                 len = m_fixhdr(mdp->md_top);
  342                 if (len > dp->ioc_rdatacnt) {
  343                         error = EMSGSIZE;
  344                         goto bad;
  345                 }
  346                 dp->ioc_rdatacnt = len;
  347                 error = md_get_mem(mdp, dp->ioc_rdata, len, MB_MUSER);
  348         } else
  349                 dp->ioc_rdatacnt = 0;
  350 bad:
  351         if (t2p->t_name)
  352                 smb_strfree(t2p->t_name);
  353         smb_t2_done(t2p);
  354         return error;
  355 }

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