sys/netproto/ncp/ncp_mod.c

   1 /*
   2  * Copyright (c) 1999, 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  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *    This product includes software developed by Boris Popov.
  16  * 4. Neither the name of the author nor the names of any co-contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  * $FreeBSD: src/sys/netncp/ncp_mod.c,v 1.2 1999/10/12 10:36:59 bp Exp $
  33  * $DragonFly: src/sys/netproto/ncp/ncp_mod.c,v 1.11 2006/12/22 23:57:54 swildner Exp $
  34  */
  35 #include <sys/param.h>
  36 #include <sys/systm.h>
  37 #include <sys/sysproto.h>
  38 #include <sys/sysent.h>
  39 #include <sys/proc.h>
  40 #include <sys/kernel.h>
  41 #include <sys/sysctl.h>
  42 #include <sys/malloc.h>
  43 #include <sys/uio.h>
  44 #include <sys/msgport.h>
  45
  46 #include "ncp.h"
  47 #include "ncp_conn.h"
  48 #include "ncp_subr.h"
  49 #include "ncp_ncp.h"
  50 #include "ncp_user.h"
  51 #include "ncp_rq.h"
  52 #include "ncp_nls.h"
  53
  54 int ncp_version = NCP_VERSION;
  55
  56 static int ncp_sysent;
  57
  58 SYSCTL_NODE(_net, OID_AUTO, ncp, CTLFLAG_RW, NULL, "NetWare requester");
  59 SYSCTL_INT(_net_ncp, OID_AUTO, sysent, CTLFLAG_RD, &ncp_sysent, 0, "");
  60 SYSCTL_INT(_net_ncp, OID_AUTO, version, CTLFLAG_RD, &ncp_version, 0, "");
  61
  62 static int
  63 ncp_conn_frag_rq(struct ncp_conn *conn, struct thread *td, struct ncp_conn_frag *nfp);
  64
  65 /*
  66  * Attach to NCP server
  67  */
  68 struct sncp_connect_args {
  69         struct sysmsg sysmsg;
  70         struct ncp_conn_args *li;
  71         int *connHandle;
  72 };
  73
  74 /*
  75  * MPALMOSTSAFE
  76  */
  77 static int
  78 sys_sncp_connect(struct sncp_connect_args *uap)
  79 {
  80         struct thread *td = curthread;
  81         int connHandle = 0, error;
  82         struct ncp_conn *conn;
  83         struct ncp_handle *handle;
  84         struct ncp_conn_args li;
  85         struct ucred *cred;
  86
  87         KKASSERT(td->td_proc);
  88         cred = td->td_proc->p_ucred;
  89
  90         checkbad(copyin(uap->li,&li,sizeof(li)));
  91         checkbad(copyout(&connHandle,uap->connHandle,sizeof(connHandle))); /* check before */
  92         li.password = li.user = NULL;
  93
  94         get_mplock();
  95         error = ncp_conn_getattached(&li, td, cred, NCPM_WRITE | NCPM_EXECUTE, &conn);
  96         if (error) {
  97                 error = ncp_connect(&li, td, cred, &conn);
  98         }
  99         if (!error) {
 100                 error = ncp_conn_gethandle(conn, td, &handle);
 101                 if (error == 0)
 102                         copyout(&handle->nh_id, uap->connHandle, sizeof(uap->connHandle));
 103                 ncp_conn_unlock(conn,td);
 104         }
 105         rel_mplock();
 106 bad:
 107         uap->sysmsg_result = error;
 108         return error;
 109 }
 110
 111 struct sncp_request_args {
 112         struct sysmsg sysmsg;
 113         int connHandle;
 114         int fn;
 115         struct ncp_buf *ncpbuf;
 116 };
 117
 118 static int ncp_conn_handler(struct thread *td, struct sncp_request_args *uap,
 119         struct ncp_conn *conn, struct ncp_handle *handle);
 120
 121 /*
 122  * MPALMOSTSAFE
 123  */
 124 static int
 125 sys_sncp_request(struct sncp_request_args *uap)
 126 {
 127         struct thread *td = curthread;
 128         int error = 0, rqsize;
 129         struct ncp_conn *conn;
 130         struct ncp_handle *handle;
 131         struct ucred *cred;
 132
 133         DECLARE_RQ;
 134
 135         get_mplock();
 136
 137         cred = td->td_proc->p_ucred;
 138
 139         error = ncp_conn_findhandle(uap->connHandle,td,&handle);
 140         if (error)
 141                 goto done;
 142         conn = handle->nh_conn;
 143         if (uap->fn == NCP_CONN) {
 144                 error = ncp_conn_handler(td, uap, conn, handle);
 145                 goto done;
 146         }
 147         error = copyin(&uap->ncpbuf->rqsize, &rqsize, sizeof(int));
 148         if (error)
 149                 goto done;
 150         error = ncp_conn_lock(conn,td,cred,NCPM_EXECUTE);
 151         if (error)
 152                 goto done;
 153         ncp_rq_head(rqp,NCP_REQUEST,uap->fn,td,cred);
 154         if (rqsize)
 155                 error = ncp_rq_usermem(rqp,(caddr_t)uap->ncpbuf->packet, rqsize);
 156         if (!error) {
 157                 error = ncp_request(conn, rqp);
 158                 if (error == 0 && rqp->rpsize)
 159                         ncp_rp_usermem(rqp, (caddr_t)uap->ncpbuf->packet,
 160                                 rqp->rpsize);
 161                 copyout(&rqp->cs, &uap->ncpbuf->cs, sizeof(rqp->cs));
 162                 copyout(&rqp->cc, &uap->ncpbuf->cc, sizeof(rqp->cc));
 163                 copyout(&rqp->rpsize, &uap->ncpbuf->rpsize, sizeof(rqp->rpsize));
 164         }
 165         ncp_rq_done(rqp);
 166         ncp_conn_unlock(conn,td);
 167 done:
 168         rel_mplock();
 169         return error;
 170 }
 171
 172 static int
 173 ncp_conn_handler(struct thread *td, struct sncp_request_args *uap,
 174         struct ncp_conn *conn, struct ncp_handle *hp)
 175 {
 176         int error=0, rqsize, subfn;
 177         struct ucred *cred;
 178
 179         char *pdata;
 180
 181         KKASSERT(td->td_proc);
 182         cred = td->td_proc->p_ucred;
 183
 184         error = copyin(&uap->ncpbuf->rqsize, &rqsize, sizeof(int));
 185         if (error) return(error);
 186         error = 0;
 187         pdata = uap->ncpbuf->packet;
 188         subfn = *(pdata++) & 0xff;
 189         rqsize--;
 190         switch (subfn) {
 191             case NCP_CONN_READ: case NCP_CONN_WRITE: {
 192                 struct ncp_rw rwrq;
 193                 struct uio auio;
 194                 struct iovec iov;
 195
 196                 if (rqsize != sizeof(rwrq)) return (EBADRPC);
 197                 error = copyin(pdata,&rwrq,rqsize);
 198                 if (error) return (error);
 199                 iov.iov_base = rwrq.nrw_base;
 200                 iov.iov_len = rwrq.nrw_cnt;
 201                 auio.uio_iov = &iov;
 202                 auio.uio_iovcnt = 1;
 203                 auio.uio_offset = rwrq.nrw_offset;
 204                 auio.uio_resid = rwrq.nrw_cnt;
 205                 auio.uio_segflg = UIO_USERSPACE;
 206                 auio.uio_rw = (subfn == NCP_CONN_READ) ? UIO_READ : UIO_WRITE;
 207                 auio.uio_td = td;
 208                 error = ncp_conn_lock(conn,td,cred,NCPM_EXECUTE);
 209                 if (error) return(error);
 210                 if (subfn == NCP_CONN_READ)
 211                         error = ncp_read(conn, &rwrq.nrw_fh, &auio, cred);
 212                 else
 213                         error = ncp_write(conn, &rwrq.nrw_fh, &auio, cred);
 214                 rwrq.nrw_cnt -= auio.uio_resid;
 215                 ncp_conn_unlock(conn,td);
 216                 uap->sysmsg_result = rwrq.nrw_cnt;
 217                 break;
 218             } /* case int_read/write */
 219             case NCP_CONN_SETFLAGS: {
 220                 u_int16_t mask, flags;
 221
 222                 error = copyin(pdata,&mask, sizeof(mask));
 223                 if (error) return error;
 224                 pdata += sizeof(mask);
 225                 error = copyin(pdata,&flags,sizeof(flags));
 226                 if (error) return error;
 227                 error = ncp_conn_lock(conn,td,cred,NCPM_WRITE);
 228                 if (error) return error;
 229                 if (mask & NCPFL_PERMANENT) {
 230                         conn->flags &= ~NCPFL_PERMANENT;
 231                         conn->flags |= (flags & NCPFL_PERMANENT);
 232                 }
 233                 if (mask & NCPFL_PRIMARY) {
 234                         error = ncp_conn_setprimary(conn, flags & NCPFL_PRIMARY);
 235                         if (error) {
 236                                 ncp_conn_unlock(conn,td);
 237                                 break;
 238                         }
 239                 }
 240                 ncp_conn_unlock(conn,td);
 241                 break;
 242             }
 243             case NCP_CONN_LOGIN: {
 244                 struct ncp_conn_login la;
 245
 246                 if (rqsize != sizeof(la)) return (EBADRPC);
 247                 if ((error = copyin(pdata,&la,rqsize)) != 0) break;
 248                 error = ncp_conn_lock(conn, td, cred, NCPM_EXECUTE | NCPM_WRITE);
 249                 if (error) return error;
 250                 error = ncp_login(conn, la.username, la.objtype, la.password, td, cred);
 251                 ncp_conn_unlock(conn, td);
 252                 uap->sysmsg_result = error;
 253                 break;
 254             }
 255             case NCP_CONN_GETINFO: {
 256                 struct ncp_conn_stat ncs;
 257                 int len = sizeof(ncs);
 258
 259                 error = ncp_conn_lock(conn, td, cred, NCPM_READ);
 260                 if (error) return error;
 261                 ncp_conn_getinfo(conn, &ncs);
 262                 copyout(&len, &uap->ncpbuf->rpsize, sizeof(int));
 263                 error = copyout(&ncs, &uap->ncpbuf->packet, len);
 264                 ncp_conn_unlock(conn, td);
 265                 break;
 266             }
 267             case NCP_CONN_GETUSER: {
 268                 int len;
 269
 270                 error = ncp_conn_lock(conn, td, cred, NCPM_READ);
 271                 if (error) return error;
 272                 len = (conn->li.user) ? strlen(conn->li.user) + 1 : 0;
 273                 copyout(&len, &uap->ncpbuf->rpsize, sizeof(int));
 274                 if (len) {
 275                         error = copyout(conn->li.user, &uap->ncpbuf->packet, len);
 276                 }
 277                 ncp_conn_unlock(conn, td);
 278                 break;
 279             }
 280             case NCP_CONN_CONN2REF: {
 281                 int len = sizeof(int);
 282
 283                 error = ncp_conn_lock(conn, td, cred, NCPM_READ);
 284                 if (error) return error;
 285                 copyout(&len, &uap->ncpbuf->rpsize, sizeof(int));
 286                 if (len) {
 287                         error = copyout(&conn->nc_id, &uap->ncpbuf->packet, len);
 288                 }
 289                 ncp_conn_unlock(conn, td);
 290                 break;
 291             }
 292             case NCP_CONN_FRAG: {
 293                 struct ncp_conn_frag nf;
 294
 295                 if (rqsize != sizeof(nf)) return (EBADRPC);
 296                 if ((error = copyin(pdata, &nf, rqsize)) != 0) break;
 297                 error = ncp_conn_lock(conn, td, cred, NCPM_EXECUTE);
 298                 if (error) return error;
 299                 error = ncp_conn_frag_rq(conn, td, &nf);
 300                 ncp_conn_unlock(conn, td);
 301                 copyout(&nf, &pdata, sizeof(nf));
 302                 uap->sysmsg_result = error;
 303                 break;
 304             }
 305             case NCP_CONN_DUP: {
 306                 struct ncp_handle *newhp;
 307                 int len = sizeof(NWCONN_HANDLE);
 308
 309                 error = ncp_conn_lock(conn, td, cred, NCPM_READ);
 310                 if (error) break;
 311                 copyout(&len, &uap->ncpbuf->rpsize, len);
 312                 error = ncp_conn_gethandle(conn, td, &newhp);
 313                 if (!error)
 314                         error = copyout(&newhp->nh_id, uap->ncpbuf->packet, len);
 315                 ncp_conn_unlock(conn,td);
 316                 break;
 317             }
 318             case NCP_CONN_CONNCLOSE: {
 319                 error = ncp_conn_lock(conn, td, cred, NCPM_EXECUTE);
 320                 if (error) break;
 321                 ncp_conn_puthandle(hp, td, 0);
 322                 error = ncp_disconnect(conn);
 323                 if (error)
 324                         ncp_conn_unlock(conn, td);
 325                 break;
 326             }
 327             default:
 328                     error = EOPNOTSUPP;
 329         }
 330         return error;
 331 }
 332
 333 struct sncp_conn_scan_args {
 334         struct sysmsg sysmsg;
 335         struct ncp_conn_args *li;
 336         int *connHandle;
 337 };
 338
 339 /*
 340  * MPALMOSTSAFE
 341  */
 342 static int
 343 sys_sncp_conn_scan(struct thread *td, struct sncp_conn_scan_args *uap)
 344 {
 345         int connHandle = 0, error;
 346         struct ncp_conn_args li, *lip;
 347         struct ncp_conn *conn;
 348         struct ncp_handle *hp;
 349         char *user = NULL, *password = NULL;
 350         struct ucred *cred;
 351
 352         KKASSERT(td->td_proc);
 353         cred = td->td_proc->p_ucred;
 354
 355         if (uap->li) {
 356                 if (copyin(uap->li,&li,sizeof(li))) return EFAULT;
 357                 lip = &li;
 358         } else {
 359                 lip = NULL;
 360         }
 361
 362         if (lip != NULL) {
 363                 lip->server[sizeof(lip->server)-1]=0; /* just to make sure */
 364                 ncp_str_upper(lip->server);
 365                 if (lip->user) {
 366                         user = ncp_str_dup(lip->user);
 367                         if (user == NULL) return EINVAL;
 368                         ncp_str_upper(user);
 369                 }
 370                 if (lip->password) {
 371                         password = ncp_str_dup(lip->password);
 372                         if (password == NULL) {
 373                                 if (user)
 374                                         kfree(user, M_NCPDATA);
 375                                 return EINVAL;
 376                         }
 377                         ncp_str_upper(password);
 378                 }
 379                 lip->user = user;
 380                 lip->password = password;
 381         }
 382
 383         get_mplock();
 384         error = ncp_conn_getbyli(lip,td,cred,NCPM_EXECUTE,&conn);
 385         if (!error) {           /* already have this login */
 386                 ncp_conn_gethandle(conn, td, &hp);
 387                 connHandle = hp->nh_id;
 388                 ncp_conn_unlock(conn,td);
 389                 copyout(&connHandle,uap->connHandle,sizeof(connHandle));
 390         }
 391         rel_mplock();
 392         if (user) kfree(user, M_NCPDATA);
 393         if (password) kfree(password, M_NCPDATA);
 394         uap->sysmsg_result = error;
 395         return error;
 396
 397 }
 398
 399 int
 400 ncp_conn_frag_rq(struct ncp_conn *conn, struct thread *td, struct ncp_conn_frag *nfp){
 401         int error = 0, i, rpsize;
 402         u_int32_t fsize;
 403         NW_FRAGMENT *fp;
 404         struct ucred *cred;
 405         DECLARE_RQ;
 406
 407         KKASSERT(td->td_proc);
 408         cred = td->td_proc->p_ucred;
 409
 410         ncp_rq_head(rqp,NCP_REQUEST,nfp->fn,td,cred);
 411         if (nfp->rqfcnt) {
 412                 for(fp = nfp->rqf, i = 0; i < nfp->rqfcnt; i++, fp++) {
 413                         checkbad(ncp_rq_usermem(rqp,(caddr_t)fp->fragAddress, fp->fragSize));
 414                 }
 415         }
 416         checkbad(ncp_request(conn, rqp));
 417         rpsize = rqp->rpsize;
 418         if (rpsize && nfp->rpfcnt) {
 419                 for(fp = nfp->rpf, i = 0; i < nfp->rpfcnt; i++, fp++) {
 420                         checkbad(copyin(&fp->fragSize, &fsize, sizeof (fsize)));
 421                         fsize = min(fsize, rpsize);
 422                         checkbad(ncp_rp_usermem(rqp,(caddr_t)fp->fragAddress, fsize));
 423                         rpsize -= fsize;
 424                         checkbad(copyout(&fsize, &fp->fragSize, sizeof (fsize)));
 425                 }
 426         }
 427         nfp->cs = rqp->cs;
 428         nfp->cc = rqp->cc;
 429         NCP_RQ_EXIT;
 430         return error;
 431 }
 432
 433 /*
 434  * Internal functions, here should be all calls that do not require connection.
 435  * To simplify possible future movement to cdev, we use IOCTL macros.
 436  * Pretty much of this stolen from ioctl() function.
 437  */
 438 struct sncp_intfn_args {
 439         struct sysmsg sysmsg;
 440         u_long  com;
 441         caddr_t data;
 442 };
 443
 444 /*
 445  * MPSAFE
 446  */
 447 static int
 448 sys_sncp_intfn(struct sncp_intfn_args *uap)
 449 {
 450         return ENOSYS;
 451 }
 452 /*
 453  * define our new system calls
 454  */
 455 static struct sysent newent[] = {
 456         {2,     (sy_call_t*)sys_sncp_conn_scan},
 457         {2,     (sy_call_t*)sys_sncp_connect},
 458         {2,     (sy_call_t*)sys_sncp_intfn},
 459         {3,     (sy_call_t*)sys_sncp_request}
 460 };
 461
 462 #define SC_SIZE sizeof(newent)/sizeof(struct sysent)
 463 /*
 464  * Miscellaneous modules must have their own save areas...
 465  */
 466 static struct sysent    oldent[SC_SIZE];        /* save are for old callslot entry*/
 467
 468 /*
 469  * Number of syscall entries for a.out executables
 470  */
 471 /*#define nsysent SYS_MAXSYSCALL*/
 472 #define nsysent (aout_sysvec.sv_size)
 473
 474
 475 static int
 476 ncp_load(void) {
 477         int i, ff, scnt, err=0;
 478
 479         while(1) {
 480                 /* Search the table looking for an enough number of slots... */
 481                 for (scnt=0, ff = -1, i = 0; i < nsysent; i++) {
 482                         if (sysent[i].sy_call == (sy_call_t *)sys_lkmnosys) {
 483                                 if (ff == -1) {
 484                                     ff = i;
 485                                     scnt = 1;
 486                                 } else {
 487                                     scnt++;
 488                                     if (scnt == SC_SIZE) break;
 489                                 }
 490                         } else {
 491                                 ff = -1;
 492                         }
 493                 }
 494                 /* out of allocable slots?*/
 495                 if(i == nsysent || ff == -1) {
 496                         err = ENFILE;
 497                         break;
 498                 }
 499                 err = ncp_init();
 500                 if (err) break;
 501                 bcopy(&sysent[ff], &oldent, sizeof(struct sysent)*SC_SIZE);
 502                 bcopy(&newent, &sysent[ff], sizeof(struct sysent)*SC_SIZE);
 503                 ncp_sysent = ff;        /* slot in sysent[]*/
 504                 kprintf("ncp_load: [%d-%d]\n",ff,i);
 505                 break;
 506         }
 507
 508         return( err);
 509 }
 510
 511 static int
 512 ncp_unload(void) {
 513         ncp_done();
 514         bcopy(&oldent, &sysent[ncp_sysent], sizeof(struct sysent) * SC_SIZE);
 515         kprintf( "ncp_unload: unloaded\n");
 516         return 0;
 517 }
 518
 519 static int
 520 ncp_mod_handler(module_t mod, int type, void *data)
 521 {
 522         int error;
 523
 524         switch (type) {
 525             case MOD_LOAD:
 526                 error = ncp_load();
 527                 break;
 528             case MOD_UNLOAD:
 529                 error = ncp_unload();
 530                 break;
 531             default:
 532                 error = EINVAL;
 533         }
 534         return error;
 535 }
 536                                                                \
 537 static moduledata_t ncp_mod = {
 538         "ncp",
 539         ncp_mod_handler,
 540         NULL
 541 };
 542 DECLARE_MODULE(ncp, ncp_mod, SI_SUB_PROTO_DOMAIN, SI_ORDER_ANY);