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 static int
  75 sncp_connect(struct sncp_connect_args *uap)
  76 {
  77         struct thread *td = curthread;
  78         int connHandle = 0, error;
  79         struct ncp_conn *conn;
  80         struct ncp_handle *handle;
  81         struct ncp_conn_args li;
  82         struct ucred *cred;
  83
  84         KKASSERT(td->td_proc);
  85         cred = td->td_proc->p_ucred;
  86
  87         checkbad(copyin(uap->li,&li,sizeof(li)));
  88         checkbad(copyout(&connHandle,uap->connHandle,sizeof(connHandle))); /* check before */
  89         li.password = li.user = NULL;
  90         error = ncp_conn_getattached(&li, td, cred, NCPM_WRITE | NCPM_EXECUTE, &conn);
  91         if (error) {
  92                 error = ncp_connect(&li, td, cred, &conn);
  93         }
  94         if (!error) {
  95                 error = ncp_conn_gethandle(conn, td, &handle);
  96                 copyout(&handle->nh_id, uap->connHandle, sizeof(uap->connHandle));
  97                 ncp_conn_unlock(conn,td);
  98         }
  99 bad:
 100         uap->sysmsg_result = error;
 101         return error;
 102 }
 103
 104 struct sncp_request_args {
 105         struct sysmsg sysmsg;
 106         int connHandle;
 107         int fn;
 108         struct ncp_buf *ncpbuf;
 109 };
 110
 111 static int ncp_conn_handler(struct thread *td, struct sncp_request_args *uap,
 112         struct ncp_conn *conn, struct ncp_handle *handle);
 113
 114 static int
 115 sncp_request(struct sncp_request_args *uap)
 116 {
 117         struct thread *td = curthread;
 118         int error = 0, rqsize;
 119         struct ncp_conn *conn;
 120         struct ncp_handle *handle;
 121         struct ucred *cred;
 122
 123         DECLARE_RQ;
 124
 125         KKASSERT(td->td_proc);
 126         cred = td->td_proc->p_ucred;
 127
 128         error = ncp_conn_findhandle(uap->connHandle,td,&handle);
 129         if (error) return error;
 130         conn = handle->nh_conn;
 131         if (uap->fn == NCP_CONN)
 132                 return ncp_conn_handler(td, uap, conn, handle);
 133         error = copyin(&uap->ncpbuf->rqsize, &rqsize, sizeof(int));
 134         if (error) return(error);
 135         error = ncp_conn_lock(conn,td,cred,NCPM_EXECUTE);
 136         if (error) return(error);
 137         ncp_rq_head(rqp,NCP_REQUEST,uap->fn,td,cred);
 138         if (rqsize)
 139                 error = ncp_rq_usermem(rqp,(caddr_t)uap->ncpbuf->packet, rqsize);
 140         if (!error) {
 141                 error = ncp_request(conn, rqp);
 142                 if (error == 0 && rqp->rpsize)
 143                         ncp_rp_usermem(rqp, (caddr_t)uap->ncpbuf->packet,
 144                                 rqp->rpsize);
 145                 copyout(&rqp->cs, &uap->ncpbuf->cs, sizeof(rqp->cs));
 146                 copyout(&rqp->cc, &uap->ncpbuf->cc, sizeof(rqp->cc));
 147                 copyout(&rqp->rpsize, &uap->ncpbuf->rpsize, sizeof(rqp->rpsize));
 148         }
 149         ncp_rq_done(rqp);
 150         ncp_conn_unlock(conn,td);
 151         return error;
 152 }
 153
 154 static int
 155 ncp_conn_handler(struct thread *td, struct sncp_request_args *uap,
 156         struct ncp_conn *conn, struct ncp_handle *hp)
 157 {
 158         int error=0, rqsize, subfn;
 159         struct ucred *cred;
 160
 161         char *pdata;
 162
 163         KKASSERT(td->td_proc);
 164         cred = td->td_proc->p_ucred;
 165
 166         error = copyin(&uap->ncpbuf->rqsize, &rqsize, sizeof(int));
 167         if (error) return(error);
 168         error = 0;
 169         pdata = uap->ncpbuf->packet;
 170         subfn = *(pdata++) & 0xff;
 171         rqsize--;
 172         switch (subfn) {
 173             case NCP_CONN_READ: case NCP_CONN_WRITE: {
 174                 struct ncp_rw rwrq;
 175                 struct uio auio;
 176                 struct iovec iov;
 177
 178                 if (rqsize != sizeof(rwrq)) return (EBADRPC);
 179                 error = copyin(pdata,&rwrq,rqsize);
 180                 if (error) return (error);
 181                 iov.iov_base = rwrq.nrw_base;
 182                 iov.iov_len = rwrq.nrw_cnt;
 183                 auio.uio_iov = &iov;
 184                 auio.uio_iovcnt = 1;
 185                 auio.uio_offset = rwrq.nrw_offset;
 186                 auio.uio_resid = rwrq.nrw_cnt;
 187                 auio.uio_segflg = UIO_USERSPACE;
 188                 auio.uio_rw = (subfn == NCP_CONN_READ) ? UIO_READ : UIO_WRITE;
 189                 auio.uio_td = td;
 190                 error = ncp_conn_lock(conn,td,cred,NCPM_EXECUTE);
 191                 if (error) return(error);
 192                 if (subfn == NCP_CONN_READ)
 193                         error = ncp_read(conn, &rwrq.nrw_fh, &auio, cred);
 194                 else
 195                         error = ncp_write(conn, &rwrq.nrw_fh, &auio, cred);
 196                 rwrq.nrw_cnt -= auio.uio_resid;
 197                 ncp_conn_unlock(conn,td);
 198                 uap->sysmsg_result = rwrq.nrw_cnt;
 199                 break;
 200             } /* case int_read/write */
 201             case NCP_CONN_SETFLAGS: {
 202                 u_int16_t mask, flags;
 203
 204                 error = copyin(pdata,&mask, sizeof(mask));
 205                 if (error) return error;
 206                 pdata += sizeof(mask);
 207                 error = copyin(pdata,&flags,sizeof(flags));
 208                 if (error) return error;
 209                 error = ncp_conn_lock(conn,td,cred,NCPM_WRITE);
 210                 if (error) return error;
 211                 if (mask & NCPFL_PERMANENT) {
 212                         conn->flags &= ~NCPFL_PERMANENT;
 213                         conn->flags |= (flags & NCPFL_PERMANENT);
 214                 }
 215                 if (mask & NCPFL_PRIMARY) {
 216                         error = ncp_conn_setprimary(conn, flags & NCPFL_PRIMARY);
 217                         if (error) {
 218                                 ncp_conn_unlock(conn,td);
 219                                 break;
 220                         }
 221                 }
 222                 ncp_conn_unlock(conn,td);
 223                 break;
 224             }
 225             case NCP_CONN_LOGIN: {
 226                 struct ncp_conn_login la;
 227
 228                 if (rqsize != sizeof(la)) return (EBADRPC);
 229                 if ((error = copyin(pdata,&la,rqsize)) != 0) break;
 230                 error = ncp_conn_lock(conn, td, cred, NCPM_EXECUTE | NCPM_WRITE);
 231                 if (error) return error;
 232                 error = ncp_login(conn, la.username, la.objtype, la.password, td, cred);
 233                 ncp_conn_unlock(conn, td);
 234                 uap->sysmsg_result = error;
 235                 break;
 236             }
 237             case NCP_CONN_GETINFO: {
 238                 struct ncp_conn_stat ncs;
 239                 int len = sizeof(ncs);
 240
 241                 error = ncp_conn_lock(conn, td, cred, NCPM_READ);
 242                 if (error) return error;
 243                 ncp_conn_getinfo(conn, &ncs);
 244                 copyout(&len, &uap->ncpbuf->rpsize, sizeof(int));
 245                 error = copyout(&ncs, &uap->ncpbuf->packet, len);
 246                 ncp_conn_unlock(conn, td);
 247                 break;
 248             }
 249             case NCP_CONN_GETUSER: {
 250                 int len;
 251
 252                 error = ncp_conn_lock(conn, td, cred, NCPM_READ);
 253                 if (error) return error;
 254                 len = (conn->li.user) ? strlen(conn->li.user) + 1 : 0;
 255                 copyout(&len, &uap->ncpbuf->rpsize, sizeof(int));
 256                 if (len) {
 257                         error = copyout(conn->li.user, &uap->ncpbuf->packet, len);
 258                 }
 259                 ncp_conn_unlock(conn, td);
 260                 break;
 261             }
 262             case NCP_CONN_CONN2REF: {
 263                 int len = sizeof(int);
 264
 265                 error = ncp_conn_lock(conn, td, cred, NCPM_READ);
 266                 if (error) return error;
 267                 copyout(&len, &uap->ncpbuf->rpsize, sizeof(int));
 268                 if (len) {
 269                         error = copyout(&conn->nc_id, &uap->ncpbuf->packet, len);
 270                 }
 271                 ncp_conn_unlock(conn, td);
 272                 break;
 273             }
 274             case NCP_CONN_FRAG: {
 275                 struct ncp_conn_frag nf;
 276
 277                 if (rqsize != sizeof(nf)) return (EBADRPC);
 278                 if ((error = copyin(pdata, &nf, rqsize)) != 0) break;
 279                 error = ncp_conn_lock(conn, td, cred, NCPM_EXECUTE);
 280                 if (error) return error;
 281                 error = ncp_conn_frag_rq(conn, td, &nf);
 282                 ncp_conn_unlock(conn, td);
 283                 copyout(&nf, &pdata, sizeof(nf));
 284                 uap->sysmsg_result = error;
 285                 break;
 286             }
 287             case NCP_CONN_DUP: {
 288                 struct ncp_handle *newhp;
 289                 int len = sizeof(NWCONN_HANDLE);
 290
 291                 error = ncp_conn_lock(conn, td, cred, NCPM_READ);
 292                 if (error) break;
 293                 copyout(&len, &uap->ncpbuf->rpsize, len);
 294                 error = ncp_conn_gethandle(conn, td, &newhp);
 295                 if (!error)
 296                         error = copyout(&newhp->nh_id, uap->ncpbuf->packet, len);
 297                 ncp_conn_unlock(conn,td);
 298                 break;
 299             }
 300             case NCP_CONN_CONNCLOSE: {
 301                 error = ncp_conn_lock(conn, td, cred, NCPM_EXECUTE);
 302                 if (error) break;
 303                 ncp_conn_puthandle(hp, td, 0);
 304                 error = ncp_disconnect(conn);
 305                 if (error)
 306                         ncp_conn_unlock(conn, td);
 307                 break;
 308             }
 309             default:
 310                     error = EOPNOTSUPP;
 311         }
 312         return error;
 313 }
 314
 315 struct sncp_conn_scan_args {
 316         struct sysmsg sysmsg;
 317         struct ncp_conn_args *li;
 318         int *connHandle;
 319 };
 320
 321 static int
 322 sncp_conn_scan(struct thread *td, struct sncp_conn_scan_args *uap)
 323 {
 324         int connHandle = 0, error;
 325         struct ncp_conn_args li, *lip;
 326         struct ncp_conn *conn;
 327         struct ncp_handle *hp;
 328         char *user = NULL, *password = NULL;
 329         struct ucred *cred;
 330
 331         KKASSERT(td->td_proc);
 332         cred = td->td_proc->p_ucred;
 333
 334         if (uap->li) {
 335                 if (copyin(uap->li,&li,sizeof(li))) return EFAULT;
 336                 lip = &li;
 337         } else {
 338                 lip = NULL;
 339         }
 340
 341         if (lip != NULL) {
 342                 lip->server[sizeof(lip->server)-1]=0; /* just to make sure */
 343                 ncp_str_upper(lip->server);
 344                 if (lip->user) {
 345                         user = ncp_str_dup(lip->user);
 346                         if (user == NULL) return EINVAL;
 347                         ncp_str_upper(user);
 348                 }
 349                 if (lip->password) {
 350                         password = ncp_str_dup(lip->password);
 351                         if (password == NULL) {
 352                                 if (user)
 353                                         kfree(user, M_NCPDATA);
 354                                 return EINVAL;
 355                         }
 356                         ncp_str_upper(password);
 357                 }
 358                 lip->user = user;
 359                 lip->password = password;
 360         }
 361         error = ncp_conn_getbyli(lip,td,cred,NCPM_EXECUTE,&conn);
 362         if (!error) {           /* already have this login */
 363                 ncp_conn_gethandle(conn, td, &hp);
 364                 connHandle = hp->nh_id;
 365                 ncp_conn_unlock(conn,td);
 366                 copyout(&connHandle,uap->connHandle,sizeof(connHandle));
 367         }
 368         if (user) kfree(user, M_NCPDATA);
 369         if (password) kfree(password, M_NCPDATA);
 370         uap->sysmsg_result = error;
 371         return error;
 372
 373 }
 374
 375 int
 376 ncp_conn_frag_rq(struct ncp_conn *conn, struct thread *td, struct ncp_conn_frag *nfp){
 377         int error = 0, i, rpsize;
 378         u_int32_t fsize;
 379         NW_FRAGMENT *fp;
 380         struct ucred *cred;
 381         DECLARE_RQ;
 382
 383         KKASSERT(td->td_proc);
 384         cred = td->td_proc->p_ucred;
 385
 386         ncp_rq_head(rqp,NCP_REQUEST,nfp->fn,td,cred);
 387         if (nfp->rqfcnt) {
 388                 for(fp = nfp->rqf, i = 0; i < nfp->rqfcnt; i++, fp++) {
 389                         checkbad(ncp_rq_usermem(rqp,(caddr_t)fp->fragAddress, fp->fragSize));
 390                 }
 391         }
 392         checkbad(ncp_request(conn, rqp));
 393         rpsize = rqp->rpsize;
 394         if (rpsize && nfp->rpfcnt) {
 395                 for(fp = nfp->rpf, i = 0; i < nfp->rpfcnt; i++, fp++) {
 396                         checkbad(copyin(&fp->fragSize, &fsize, sizeof (fsize)));
 397                         fsize = min(fsize, rpsize);
 398                         checkbad(ncp_rp_usermem(rqp,(caddr_t)fp->fragAddress, fsize));
 399                         rpsize -= fsize;
 400                         checkbad(copyout(&fsize, &fp->fragSize, sizeof (fsize)));
 401                 }
 402         }
 403         nfp->cs = rqp->cs;
 404         nfp->cc = rqp->cc;
 405         NCP_RQ_EXIT;
 406         return error;
 407 }
 408
 409 /*
 410  * Internal functions, here should be all calls that do not require connection.
 411  * To simplify possible future movement to cdev, we use IOCTL macros.
 412  * Pretty much of this stolen from ioctl() function.
 413  */
 414 struct sncp_intfn_args {
 415         struct sysmsg sysmsg;
 416         u_long  com;
 417         caddr_t data;
 418 };
 419
 420 static int
 421 sncp_intfn(struct sncp_intfn_args *uap)
 422 {
 423         return ENOSYS;
 424 }
 425 /*
 426  * define our new system calls
 427  */
 428 static struct sysent newent[] = {
 429         {2,     (sy_call_t*)sncp_conn_scan},
 430         {2,     (sy_call_t*)sncp_connect},
 431         {2,     (sy_call_t*)sncp_intfn},
 432         {3,     (sy_call_t*)sncp_request}
 433 };
 434
 435 #define SC_SIZE sizeof(newent)/sizeof(struct sysent)
 436 /*
 437  * Miscellaneous modules must have their own save areas...
 438  */
 439 static struct sysent    oldent[SC_SIZE];        /* save are for old callslot entry*/
 440
 441 /*
 442  * Number of syscall entries for a.out executables
 443  */
 444 /*#define nsysent SYS_MAXSYSCALL*/
 445 #define nsysent (aout_sysvec.sv_size)
 446
 447
 448 static int
 449 ncp_load(void) {
 450         int i, ff, scnt, err=0;
 451
 452         while(1) {
 453                 /* Search the table looking for an enough number of slots... */
 454                 for (scnt=0, ff = -1, i = 0; i < nsysent; i++) {
 455                         if (sysent[i].sy_call == (sy_call_t *)sys_lkmnosys) {
 456                                 if (ff == -1) {
 457                                     ff = i;
 458                                     scnt = 1;
 459                                 } else {
 460                                     scnt++;
 461                                     if (scnt == SC_SIZE) break;
 462                                 }
 463                         } else {
 464                                 ff = -1;
 465                         }
 466                 }
 467                 /* out of allocable slots?*/
 468                 if(i == nsysent || ff == -1) {
 469                         err = ENFILE;
 470                         break;
 471                 }
 472                 err = ncp_init();
 473                 if (err) break;
 474                 bcopy(&sysent[ff], &oldent, sizeof(struct sysent)*SC_SIZE);
 475                 bcopy(&newent, &sysent[ff], sizeof(struct sysent)*SC_SIZE);
 476                 ncp_sysent = ff;        /* slot in sysent[]*/
 477                 kprintf("ncp_load: [%d-%d]\n",ff,i);
 478                 break;
 479         }
 480
 481         return( err);
 482 }
 483
 484 static int
 485 ncp_unload(void) {
 486         ncp_done();
 487         bcopy(&oldent, &sysent[ncp_sysent], sizeof(struct sysent) * SC_SIZE);
 488         kprintf( "ncp_unload: unloaded\n");
 489         return 0;
 490 }
 491
 492 static int
 493 ncp_mod_handler(module_t mod, int type, void *data)
 494 {
 495         int error;
 496
 497         switch (type) {
 498             case MOD_LOAD:
 499                 error = ncp_load();
 500                 break;
 501             case MOD_UNLOAD:
 502                 error = ncp_unload();
 503                 break;
 504             default:
 505                 error = EINVAL;
 506         }
 507         return error;
 508 }
 509                                                                \
 510 static moduledata_t ncp_mod = {
 511         "ncp",
 512         ncp_mod_handler,
 513         NULL
 514 };
 515 DECLARE_MODULE(ncp, ncp_mod, SI_SUB_PROTO_DOMAIN, SI_ORDER_ANY);