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  * 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: stable/12/sys/netsmb/smb_usr.c 326272 2017-11-27 15:23:17Z pfg $");
   31 
   32 #include <sys/param.h>
   33 #include <sys/malloc.h>
   34 #include <sys/kernel.h>
   35 #include <sys/systm.h>
   36 #include <sys/conf.h>
   37 #include <sys/proc.h>
   38 #include <sys/fcntl.h>
   39 #include <sys/socket.h>
   40 #include <sys/socketvar.h>
   41 #include <sys/sysctl.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 #include <netsmb/smb_dev.h>
   51 
   52 /*
   53  * helpers for nsmb device. Can be moved to the smb_dev.c file.
   54  */
   55 static void smb_usr_vcspec_free(struct smb_vcspec *spec);
   56 
   57 static int
   58 smb_usr_vc2spec(struct smbioc_ossn *dp, struct smb_vcspec *spec)
   59 {
   60         int flags = 0;
   61 
   62         bzero(spec, sizeof(*spec));
   63 
   64 #ifdef NETSMB_NO_ANON_USER
   65         if (dp->ioc_user[0] == 0)
   66                 return EINVAL;
   67 #endif
   68 
   69         if (dp->ioc_server == NULL)
   70                 return EINVAL;
   71         if (dp->ioc_localcs[0] == 0) {
   72                 SMBERROR("no local charset ?\n");
   73                 return EINVAL;
   74         }
   75 
   76         spec->sap = smb_memdupin(dp->ioc_server, dp->ioc_svlen);
   77         if (spec->sap == NULL)
   78                 return ENOMEM;
   79         if (dp->ioc_local) {
   80                 spec->lap = smb_memdupin(dp->ioc_local, dp->ioc_lolen);
   81                 if (spec->lap == NULL) {
   82                         smb_usr_vcspec_free(spec);
   83                         return ENOMEM;
   84                 }
   85         }
   86         spec->srvname = dp->ioc_srvname;
   87         spec->pass = dp->ioc_password;
   88         spec->domain = dp->ioc_workgroup;
   89         spec->username = dp->ioc_user;
   90         spec->mode = dp->ioc_mode;
   91         spec->rights = dp->ioc_rights;
   92         spec->owner = dp->ioc_owner;
   93         spec->group = dp->ioc_group;
   94         spec->localcs = dp->ioc_localcs;
   95         spec->servercs = dp->ioc_servercs;
   96         if (dp->ioc_opt & SMBVOPT_PRIVATE)
   97                 flags |= SMBV_PRIVATE;
   98         if (dp->ioc_opt & SMBVOPT_SINGLESHARE)
   99                 flags |= SMBV_PRIVATE | SMBV_SINGLESHARE;
  100         spec->flags = flags;
  101         return 0;
  102 }
  103 
  104 static void
  105 smb_usr_vcspec_free(struct smb_vcspec *spec)
  106 {
  107         if (spec->sap)
  108                 smb_memfree(spec->sap);
  109         if (spec->lap)
  110                 smb_memfree(spec->lap);
  111 }
  112 
  113 static int
  114 smb_usr_share2spec(struct smbioc_oshare *dp, struct smb_sharespec *spec)
  115 {
  116         bzero(spec, sizeof(*spec));
  117         spec->mode = dp->ioc_mode;
  118         spec->rights = dp->ioc_rights;
  119         spec->owner = dp->ioc_owner;
  120         spec->group = dp->ioc_group;
  121         spec->name = dp->ioc_share;
  122         spec->stype = dp->ioc_stype;
  123         spec->pass = dp->ioc_password;
  124         return 0;
  125 }
  126 
  127 int
  128 smb_usr_lookup(struct smbioc_lookup *dp, struct smb_cred *scred,
  129         struct smb_vc **vcpp, struct smb_share **sspp)
  130 {
  131         struct smb_vc *vcp = NULL;
  132         struct smb_vcspec vspec;                        /* XXX */
  133         struct smb_sharespec sspec, *sspecp = NULL;     /* XXX */
  134         int error;
  135 
  136         if (dp->ioc_level < SMBL_VC || dp->ioc_level > SMBL_SHARE)
  137                 return EINVAL;
  138         error = smb_usr_vc2spec(&dp->ioc_ssn, &vspec);
  139         if (error)
  140                 return error;
  141         if (dp->ioc_flags & SMBLK_CREATE)
  142                 vspec.flags |= SMBV_CREATE;
  143 
  144         if (dp->ioc_level >= SMBL_SHARE) {
  145                 error = smb_usr_share2spec(&dp->ioc_sh, &sspec);
  146                 if (error)
  147                         goto out;
  148                 sspecp = &sspec;
  149         }
  150         error = smb_sm_lookup(&vspec, sspecp, scred, &vcp);
  151         if (error == 0) {
  152                 *vcpp = vcp;
  153                 *sspp = vspec.ssp;
  154         }
  155 out:
  156         smb_usr_vcspec_free(&vspec);
  157         return error;
  158 }
  159 
  160 /*
  161  * Connect to the resource specified by smbioc_ossn structure.
  162  * It may either find an existing connection or try to establish a new one.
  163  * If no errors occurred smb_vc returned locked and referenced.
  164  */
  165 int
  166 smb_usr_opensession(struct smbioc_ossn *dp, struct smb_cred *scred,
  167         struct smb_vc **vcpp)
  168 {
  169         struct smb_vc *vcp = NULL;
  170         struct smb_vcspec vspec;
  171         int error;
  172 
  173         error = smb_usr_vc2spec(dp, &vspec);
  174         if (error)
  175                 return error;
  176         if (dp->ioc_opt & SMBVOPT_CREATE)
  177                 vspec.flags |= SMBV_CREATE;
  178 
  179         error = smb_sm_lookup(&vspec, NULL, scred, &vcp);
  180         smb_usr_vcspec_free(&vspec);
  181         return error;
  182 }
  183 
  184 int
  185 smb_usr_openshare(struct smb_vc *vcp, struct smbioc_oshare *dp,
  186         struct smb_cred *scred, struct smb_share **sspp)
  187 {
  188         struct smb_share *ssp;
  189         struct smb_sharespec shspec;
  190         int error;
  191 
  192         error = smb_usr_share2spec(dp, &shspec);
  193         if (error)
  194                 return error;
  195         error = smb_vc_lookupshare(vcp, &shspec, scred, &ssp);
  196         if (error == 0) {
  197                 *sspp = ssp;
  198                 return 0;
  199         }
  200         if ((dp->ioc_opt & SMBSOPT_CREATE) == 0)
  201                 return error;
  202         error = smb_share_create(vcp, &shspec, scred, &ssp);
  203         if (error)
  204                 return error;
  205         error = smb_smb_treeconnect(ssp, scred);
  206         if (error) {
  207                 smb_share_put(ssp, scred);
  208         } else
  209                 *sspp = ssp;
  210         return error;
  211 }
  212 
  213 int
  214 smb_usr_simplerequest(struct smb_share *ssp, struct smbioc_rq *dp,
  215         struct smb_cred *scred)
  216 {
  217         struct smb_rq *rqp;
  218         struct mbchain *mbp;
  219         struct mdchain *mdp;
  220         u_int8_t wc;
  221         u_int16_t bc;
  222         int error;
  223 
  224         switch (dp->ioc_cmd) {
  225             case SMB_COM_TRANSACTION2:
  226             case SMB_COM_TRANSACTION2_SECONDARY:
  227             case SMB_COM_CLOSE_AND_TREE_DISC:
  228             case SMB_COM_TREE_CONNECT:
  229             case SMB_COM_TREE_DISCONNECT:
  230             case SMB_COM_NEGOTIATE:
  231             case SMB_COM_SESSION_SETUP_ANDX:
  232             case SMB_COM_LOGOFF_ANDX:
  233             case SMB_COM_TREE_CONNECT_ANDX:
  234                 return EPERM;
  235         }
  236         rqp = malloc(sizeof(struct smb_rq), M_SMBTEMP, M_WAITOK);
  237         error = smb_rq_init(rqp, SSTOCP(ssp), dp->ioc_cmd, scred);
  238         if (error) {
  239                 free(rqp, M_SMBTEMP);
  240                 return error;
  241         }
  242         mbp = &rqp->sr_rq;
  243         smb_rq_wstart(rqp);
  244         error = mb_put_mem(mbp, dp->ioc_twords, dp->ioc_twc * 2, MB_MUSER);
  245         if (error)
  246                 goto bad;
  247         smb_rq_wend(rqp);
  248         smb_rq_bstart(rqp);
  249         error = mb_put_mem(mbp, dp->ioc_tbytes, dp->ioc_tbc, MB_MUSER);
  250         if (error)
  251                 goto bad;
  252         smb_rq_bend(rqp);
  253         error = smb_rq_simple(rqp);
  254         if (error)
  255                 goto bad;
  256         mdp = &rqp->sr_rp;
  257         md_get_uint8(mdp, &wc);
  258         dp->ioc_rwc = wc;
  259         wc *= 2;
  260         if (wc > dp->ioc_rpbufsz) {
  261                 error = EBADRPC;
  262                 goto bad;
  263         }
  264         error = md_get_mem(mdp, dp->ioc_rpbuf, wc, MB_MUSER);
  265         if (error)
  266                 goto bad;
  267         md_get_uint16le(mdp, &bc);
  268         if ((wc + bc) > dp->ioc_rpbufsz) {
  269                 error = EBADRPC;
  270                 goto bad;
  271         }
  272         dp->ioc_rbc = bc;
  273         error = md_get_mem(mdp, dp->ioc_rpbuf + wc, bc, MB_MUSER);
  274 bad:
  275         dp->ioc_errclass = rqp->sr_errclass;
  276         dp->ioc_serror = rqp->sr_serror;
  277         dp->ioc_error = rqp->sr_error;
  278         smb_rq_done(rqp);
  279         free(rqp, M_SMBTEMP);
  280         return error;
  281 
  282 }
  283 
  284 static int
  285 smb_cpdatain(struct mbchain *mbp, int len, caddr_t data)
  286 {
  287         int error;
  288 
  289         if (len == 0)
  290                 return 0;
  291         error = mb_init(mbp);
  292         if (error)
  293                 return error;
  294         return mb_put_mem(mbp, data, len, MB_MUSER);
  295 }
  296 
  297 int
  298 smb_usr_t2request(struct smb_share *ssp, struct smbioc_t2rq *dp,
  299         struct smb_cred *scred)
  300 {
  301         struct smb_t2rq *t2p;
  302         struct mdchain *mdp;
  303         int error, len;
  304 
  305         if (dp->ioc_setupcnt > 3)
  306                 return EINVAL;
  307         t2p = malloc(sizeof(struct smb_t2rq), M_SMBTEMP, M_WAITOK);
  308         error = smb_t2_init(t2p, SSTOCP(ssp), dp->ioc_setup[0], scred);
  309         if (error) {
  310                 free(t2p, M_SMBTEMP);
  311                 return error;
  312         }
  313         len = t2p->t2_setupcount = dp->ioc_setupcnt;
  314         if (len > 1)
  315                 t2p->t2_setupdata = dp->ioc_setup; 
  316         if (dp->ioc_name) {
  317                 t2p->t_name = smb_strdupin(dp->ioc_name, 128);
  318                 if (t2p->t_name == NULL) {
  319                         error = ENOMEM;
  320                         goto bad;
  321                 }
  322         }
  323         t2p->t2_maxscount = 0;
  324         t2p->t2_maxpcount = dp->ioc_rparamcnt;
  325         t2p->t2_maxdcount = dp->ioc_rdatacnt;
  326         error = smb_cpdatain(&t2p->t2_tparam, dp->ioc_tparamcnt, dp->ioc_tparam);
  327         if (error)
  328                 goto bad;
  329         error = smb_cpdatain(&t2p->t2_tdata, dp->ioc_tdatacnt, dp->ioc_tdata);
  330         if (error)
  331                 goto bad;
  332         error = smb_t2_request(t2p);
  333         if (error)
  334                 goto bad;
  335         mdp = &t2p->t2_rparam;
  336         if (mdp->md_top) {
  337                 len = m_fixhdr(mdp->md_top);
  338                 if (len > dp->ioc_rparamcnt) {
  339                         error = EMSGSIZE;
  340                         goto bad;
  341                 }
  342                 dp->ioc_rparamcnt = len;
  343                 error = md_get_mem(mdp, dp->ioc_rparam, len, MB_MUSER);
  344                 if (error)
  345                         goto bad;
  346         } else
  347                 dp->ioc_rparamcnt = 0;
  348         mdp = &t2p->t2_rdata;
  349         if (mdp->md_top) {
  350                 len = m_fixhdr(mdp->md_top);
  351                 if (len > dp->ioc_rdatacnt) {
  352                         error = EMSGSIZE;
  353                         goto bad;
  354                 }
  355                 dp->ioc_rdatacnt = len;
  356                 error = md_get_mem(mdp, dp->ioc_rdata, len, MB_MUSER);
  357         } else
  358                 dp->ioc_rdatacnt = 0;
  359 bad:
  360         if (t2p->t_name)
  361                 smb_strfree(t2p->t_name);
  362         smb_t2_done(t2p);
  363         free(t2p, M_SMBTEMP);
  364         return error;
  365 }

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