sys/netproto/smb/smb_trantcp.c

   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  * 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/netsmb/smb_trantcp.c,v 1.3.2.1 2001/05/22 08:32:34 bp Exp $
  33  * $DragonFly: src/sys/netproto/smb/smb_trantcp.c,v 1.21 2008/01/05 14:02:40 swildner Exp $
  34  */
  35 #include <sys/param.h>
  36 #include <sys/systm.h>
  37 #include <sys/kernel.h>
  38 #include <sys/malloc.h>
  39 #include <sys/mbuf.h>
  40 #include <sys/proc.h>
  41 #include <sys/protosw.h>
  42 #include <sys/resourcevar.h>
  43 #include <sys/socket.h>
  44 #include <sys/socketvar.h>
  45 #include <sys/socketops.h>
  46 #include <sys/poll.h>
  47 #include <sys/uio.h>
  48 #include <sys/fcntl.h>
  49 #include <sys/sysctl.h>
  50 #include <sys/thread2.h>
  51
  52 #include <net/if.h>
  53 #include <net/route.h>
  54
  55 #include <netinet/in.h>
  56 #include <netinet/tcp.h>
  57
  58 #include <sys/mchain.h>
  59
  60 #include "netbios.h"
  61
  62 #include "smb.h"
  63 #include "smb_conn.h"
  64 #include "smb_tran.h"
  65 #include "smb_trantcp.h"
  66 #include "smb_subr.h"
  67
  68 #define M_NBDATA        M_PCB
  69
  70 static int smb_tcpsndbuf = 10 * 1024;
  71 static int smb_tcprcvbuf = 10 * 1024;
  72
  73 SYSCTL_DECL(_net_smb);
  74 SYSCTL_INT(_net_smb, OID_AUTO, tcpsndbuf, CTLFLAG_RW, &smb_tcpsndbuf, 0, "");
  75 SYSCTL_INT(_net_smb, OID_AUTO, tcprcvbuf, CTLFLAG_RW, &smb_tcprcvbuf, 0, "");
  76
  77 #define nb_sosend(so,m,flags,p)                                 \
  78     so_pru_sosend(so, NULL, NULL, m, NULL, flags, td)
  79
  80 static int  nbssn_recv(struct nbpcb *nbp, struct mbuf **mpp, int *lenp,
  81         u_int8_t *rpcodep, struct thread *td);
  82 static int  smb_nbst_disconnect(struct smb_vc *vcp, struct thread *td);
  83
  84 static int
  85 nb_setsockopt_int(struct socket *so, int level, int name, int val)
  86 {
  87         struct sockopt sopt;
  88
  89         bzero(&sopt, sizeof(sopt));
  90         sopt.sopt_level = level;
  91         sopt.sopt_name = name;
  92         sopt.sopt_val = &val;
  93         sopt.sopt_valsize = sizeof(val);
  94         return sosetopt(so, &sopt);
  95 }
  96
  97 static __inline int
  98 nb_poll(struct nbpcb *nbp, int events, struct thread *td)
  99 {
 100         return so_pru_sopoll(nbp->nbp_tso, events, NULL);
 101 }
 102
 103 static int
 104 nbssn_rselect(struct nbpcb *nbp, struct timeval *tv, int events, struct thread *td)
 105 {
 106         struct lwp *lp = td->td_lwp;
 107         struct timeval atv, rtv, ttv;
 108         int timo, error;
 109
 110         if (tv) {
 111                 atv = *tv;
 112                 if (itimerfix(&atv)) {
 113                         error = EINVAL;
 114                         goto done;
 115                 }
 116                 getmicrouptime(&rtv);
 117                 timevaladd(&atv, &rtv);
 118         }
 119         timo = 0;
 120         KKASSERT(lp);
 121 retry:
 122         lp->lwp_flag |= LWP_SELECT;
 123         error = nb_poll(nbp, events, td);
 124         if (error) {
 125                 error = 0;
 126                 goto done;
 127         }
 128         if (tv) {
 129                 getmicrouptime(&rtv);
 130                 if (timevalcmp(&rtv, &atv, >=))
 131                         goto done;
 132                 ttv = atv;
 133                 timevalsub(&ttv, &rtv);
 134                 timo = tvtohz_high(&ttv);
 135         }
 136         crit_enter();
 137         if ((lp->lwp_flag & LWP_SELECT) == 0) {
 138                 crit_exit();
 139                 goto retry;
 140         }
 141         lp->lwp_flag &= ~LWP_SELECT;
 142         error = tsleep((caddr_t)&selwait, 0, "nbsel", timo);
 143         crit_exit();
 144 done:
 145         lp->lwp_flag &= ~LWP_SELECT;
 146         if (error == ERESTART)
 147                 return 0;
 148         return error;
 149 }
 150
 151 static int
 152 nb_intr(struct nbpcb *nbp, struct thread *td)
 153 {
 154         return 0;
 155 }
 156
 157 static void
 158 nb_upcall(struct socket *so, void *arg, int waitflag)
 159 {
 160         struct nbpcb *nbp = arg;
 161
 162         if (arg == NULL || nbp->nbp_selectid == NULL)
 163                 return;
 164         wakeup(nbp->nbp_selectid);
 165 }
 166
 167 static int
 168 nb_sethdr(struct mbuf *m, u_int8_t type, u_int32_t len)
 169 {
 170         u_int32_t *p = mtod(m, u_int32_t *);
 171
 172         *p = htonl((len & 0x1FFFF) | (type << 24));
 173         return 0;
 174 }
 175
 176 static int
 177 nb_put_name(struct mbchain *mbp, struct sockaddr_nb *snb)
 178 {
 179         int error;
 180         u_char seglen, *cp;
 181
 182         cp = snb->snb_name;
 183         if (*cp == 0)
 184                 return EINVAL;
 185         NBDEBUG("[%s]\n", cp);
 186         for (;;) {
 187                 seglen = (*cp) + 1;
 188                 error = mb_put_mem(mbp, cp, seglen, MB_MSYSTEM);
 189                 if (error)
 190                         return error;
 191                 if (seglen == 1)
 192                         break;
 193                 cp += seglen;
 194         }
 195         return 0;
 196 }
 197
 198 static int
 199 nb_connect_in(struct nbpcb *nbp, struct sockaddr_in *to, struct thread *td)
 200 {
 201         struct socket *so;
 202         int error;
 203
 204         error = socreate(AF_INET, &so, SOCK_STREAM, IPPROTO_TCP, td);
 205         if (error)
 206                 return error;
 207         nbp->nbp_tso = so;
 208         so->so_upcallarg = (caddr_t)nbp;
 209         so->so_upcall = nb_upcall;
 210         so->so_rcv.ssb_flags |= SSB_UPCALL;
 211         so->so_rcv.ssb_timeo = (5 * hz);
 212         so->so_snd.ssb_timeo = (5 * hz);
 213         error = soreserve(so, nbp->nbp_sndbuf, nbp->nbp_rcvbuf,
 214                           &td->td_proc->p_rlimit[RLIMIT_SBSIZE]);
 215         if (error)
 216                 goto bad;
 217         nb_setsockopt_int(so, SOL_SOCKET, SO_KEEPALIVE, 1);
 218         nb_setsockopt_int(so, IPPROTO_TCP, TCP_NODELAY, 1);
 219         so->so_rcv.ssb_flags &= ~SSB_NOINTR;
 220         so->so_snd.ssb_flags &= ~SSB_NOINTR;
 221         error = soconnect(so, (struct sockaddr*)to, td);
 222
 223         /*
 224          * If signals are allowed nbssn_recv() can wind up in a hard loop
 225          * on EWOULDBLOCK.
 226          */
 227         so->so_rcv.ssb_flags |= SSB_NOINTR;
 228         so->so_snd.ssb_flags |= SSB_NOINTR;
 229         if (error)
 230                 goto bad;
 231         crit_enter();
 232         while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) {
 233                 tsleep(&so->so_timeo, 0, "nbcon", 2 * hz);
 234                 if ((so->so_state & SS_ISCONNECTING) && so->so_error == 0 &&
 235                         (error = nb_intr(nbp, td)) != 0) {
 236                         so->so_state &= ~SS_ISCONNECTING;
 237                         crit_exit();
 238                         goto bad;
 239                 }
 240         }
 241         if (so->so_error) {
 242                 error = so->so_error;
 243                 so->so_error = 0;
 244                 crit_exit();
 245                 goto bad;
 246         }
 247         crit_exit();
 248         return 0;
 249 bad:
 250         smb_nbst_disconnect(nbp->nbp_vc, td);
 251         return error;
 252 }
 253
 254 static int
 255 nbssn_rq_request(struct nbpcb *nbp, struct thread *td)
 256 {
 257         struct mbchain mb, *mbp = &mb;
 258         struct mdchain md, *mdp = &md;
 259         struct mbuf *m0;
 260         struct timeval tv;
 261         struct sockaddr_in sin;
 262         u_short port;
 263         u_int8_t rpcode;
 264         int error, rplen;
 265
 266         error = mb_init(mbp);
 267         if (error)
 268                 return error;
 269         mb_put_uint32le(mbp, 0);
 270         nb_put_name(mbp, nbp->nbp_paddr);
 271         nb_put_name(mbp, nbp->nbp_laddr);
 272         nb_sethdr(mbp->mb_top, NB_SSN_REQUEST, mb_fixhdr(mbp) - 4);
 273         error = nb_sosend(nbp->nbp_tso, mbp->mb_top, 0, td);
 274         if (!error) {
 275                 nbp->nbp_state = NBST_RQSENT;
 276         }
 277         mb_detach(mbp);
 278         mb_done(mbp);
 279         if (error)
 280                 return error;
 281         TIMESPEC_TO_TIMEVAL(&tv, &nbp->nbp_timo);
 282         error = nbssn_rselect(nbp, &tv, POLLIN, td);
 283         if (error == EWOULDBLOCK) {     /* Timeout */
 284                 NBDEBUG("initial request timeout\n");
 285                 return ETIMEDOUT;
 286         }
 287         if (error)                      /* restart or interrupt */
 288                 return error;
 289         error = nbssn_recv(nbp, &m0, &rplen, &rpcode, td);
 290         if (error) {
 291                 NBDEBUG("recv() error %d\n", error);
 292                 return error;
 293         }
 294         /*
 295          * Process NETBIOS reply
 296          */
 297         if (m0)
 298                 md_initm(mdp, m0);
 299         error = 0;
 300         do {
 301                 if (rpcode == NB_SSN_POSRESP) {
 302                         nbp->nbp_state = NBST_SESSION;
 303                         nbp->nbp_flags |= NBF_CONNECTED;
 304                         break;
 305                 }
 306                 if (rpcode != NB_SSN_RTGRESP) {
 307                         error = ECONNABORTED;
 308                         break;
 309                 }
 310                 if (rplen != 6) {
 311                         error = ECONNABORTED;
 312                         break;
 313                 }
 314                 md_get_mem(mdp, (caddr_t)&sin.sin_addr, 4, MB_MSYSTEM);
 315                 md_get_uint16(mdp, &port);
 316                 sin.sin_port = port;
 317                 nbp->nbp_state = NBST_RETARGET;
 318                 smb_nbst_disconnect(nbp->nbp_vc, td);
 319                 error = nb_connect_in(nbp, &sin, td);
 320                 if (!error)
 321                         error = nbssn_rq_request(nbp, td);
 322                 if (error) {
 323                         smb_nbst_disconnect(nbp->nbp_vc, td);
 324                         break;
 325                 }
 326         } while(0);
 327         if (m0)
 328                 md_done(mdp);
 329         return error;
 330 }
 331
 332 static int
 333 nbssn_recvhdr(struct nbpcb *nbp, int *lenp,
 334         u_int8_t *rpcodep, int flags, struct thread *td)
 335 {
 336         struct socket *so = nbp->nbp_tso;
 337         struct uio auio;
 338         struct iovec aio;
 339         u_int32_t len;
 340         int error;
 341
 342         aio.iov_base = (caddr_t)&len;
 343         aio.iov_len = sizeof(len);
 344         auio.uio_iov = &aio;
 345         auio.uio_iovcnt = 1;
 346         auio.uio_segflg = UIO_SYSSPACE;
 347         auio.uio_rw = UIO_READ;
 348         auio.uio_offset = 0;
 349         auio.uio_resid = sizeof(len);
 350         auio.uio_td = td;
 351         error = so_pru_soreceive(so, NULL, &auio, NULL, NULL, &flags);
 352         if (error)
 353                 return error;
 354         if (auio.uio_resid > 0) {
 355                 SMBSDEBUG("short reply\n");
 356                 return EPIPE;
 357         }
 358         len = ntohl(len);
 359         *rpcodep = (len >> 24) & 0xFF;
 360         len &= 0x1ffff;
 361         if (len > SMB_MAXPKTLEN) {
 362                 SMBERROR("packet too long (%d)\n", len);
 363                 return EFBIG;
 364         }
 365         *lenp = len;
 366         return 0;
 367 }
 368
 369 static int
 370 nbssn_recv(struct nbpcb *nbp, struct mbuf **mpp, int *lenp,
 371         u_int8_t *rpcodep, struct thread *td)
 372 {
 373         struct socket *so = nbp->nbp_tso;
 374         struct sockbuf sio;
 375         int error, rcvflg;
 376         int savelen = 0;
 377         u_int8_t rpcode = 0;
 378
 379         if (so == NULL)
 380                 return ENOTCONN;
 381
 382         sbinit(&sio, 0);
 383         if (mpp)
 384                 *mpp = NULL;
 385
 386         for(;;) {
 387                 error = nbssn_recvhdr(nbp, &savelen, &rpcode, MSG_DONTWAIT, td);
 388                 if (so->so_state &
 389                     (SS_ISDISCONNECTING | SS_ISDISCONNECTED | SS_CANTRCVMORE)) {
 390                         nbp->nbp_state = NBST_CLOSED;
 391                         NBDEBUG("session closed by peer\n");
 392                         error = ECONNRESET;
 393                         break;
 394                 }
 395                 if (error)
 396                         break;
 397                 if (savelen == 0 && nbp->nbp_state != NBST_SESSION)
 398                         break;
 399                 if (rpcode == NB_SSN_KEEPALIVE)
 400                         continue;
 401                 do {
 402                         sbinit(&sio, savelen);
 403                         rcvflg = MSG_WAITALL;
 404                         error = so_pru_soreceive(so, NULL, NULL, &sio,
 405                                                  NULL, &rcvflg);
 406                 } while (error == EWOULDBLOCK || error == EINTR ||
 407                                  error == ERESTART);
 408                 if (error)
 409                         break;
 410                 if (sio.sb_cc != savelen) {
 411                         SMBERROR("packet is shorter than expected\n");
 412                         error = EPIPE;
 413                         m_freem(sio.sb_mb);
 414                         break;
 415                 }
 416                 if (nbp->nbp_state == NBST_SESSION && rpcode == NB_SSN_MESSAGE)
 417                         break;
 418                 NBDEBUG("non-session packet %x\n", rpcode);
 419                 m_freem(sio.sb_mb);
 420                 sio.sb_mb = NULL;
 421                 sio.sb_cc = 0;
 422         }
 423         if (error == 0) {
 424                 if (mpp)
 425                         *mpp = sio.sb_mb;
 426                 else
 427                         m_freem(sio.sb_mb);
 428                 *lenp = sio.sb_cc;
 429                 *rpcodep = rpcode;
 430         }
 431         return (error);
 432 }
 433
 434 /*
 435  * SMB transport interface
 436  */
 437 static int
 438 smb_nbst_create(struct smb_vc *vcp, struct thread *td)
 439 {
 440         struct nbpcb *nbp;
 441
 442         MALLOC(nbp, struct nbpcb *, sizeof *nbp, M_NBDATA, M_WAITOK | M_ZERO);
 443         nbp->nbp_timo.tv_sec = 15;      /* XXX: sysctl ? */
 444         nbp->nbp_state = NBST_CLOSED;
 445         nbp->nbp_vc = vcp;
 446         nbp->nbp_sndbuf = smb_tcpsndbuf;
 447         nbp->nbp_rcvbuf = smb_tcprcvbuf;
 448         vcp->vc_tdata = nbp;
 449         return 0;
 450 }
 451
 452 static int
 453 smb_nbst_done(struct smb_vc *vcp, struct thread *td)
 454 {
 455         struct nbpcb *nbp = vcp->vc_tdata;
 456
 457         if (nbp == NULL)
 458                 return ENOTCONN;
 459         smb_nbst_disconnect(vcp, td);
 460         if (nbp->nbp_laddr)
 461                 kfree(nbp->nbp_laddr, M_SONAME);
 462         if (nbp->nbp_paddr)
 463                 kfree(nbp->nbp_paddr, M_SONAME);
 464         kfree(nbp, M_NBDATA);
 465         return 0;
 466 }
 467
 468 static int
 469 smb_nbst_bind(struct smb_vc *vcp, struct sockaddr *sap, struct thread *td)
 470 {
 471         struct nbpcb *nbp = vcp->vc_tdata;
 472         struct sockaddr_nb *snb;
 473         int error, slen;
 474
 475         NBDEBUG("\n");
 476         error = EINVAL;
 477         do {
 478                 if (nbp->nbp_flags & NBF_LOCADDR)
 479                         break;
 480                 /*
 481                  * It is possible to create NETBIOS name in the kernel,
 482                  * but nothing prevents us to do it in the user space.
 483                  */
 484                 if (sap == NULL)
 485                         break;
 486                 slen = sap->sa_len;
 487                 if (slen < NB_MINSALEN)
 488                         break;
 489                 snb = (struct sockaddr_nb*)dup_sockaddr(sap);
 490                 if (snb == NULL) {
 491                         error = ENOMEM;
 492                         break;
 493                 }
 494                 nbp->nbp_laddr = snb;
 495                 nbp->nbp_flags |= NBF_LOCADDR;
 496                 error = 0;
 497         } while(0);
 498         return error;
 499 }
 500
 501 static int
 502 smb_nbst_connect(struct smb_vc *vcp, struct sockaddr *sap, struct thread *td)
 503 {
 504         struct nbpcb *nbp = vcp->vc_tdata;
 505         struct sockaddr_in sin;
 506         struct sockaddr_nb *snb;
 507         struct timespec ts1, ts2;
 508         int error, slen;
 509
 510         NBDEBUG("\n");
 511         if (nbp->nbp_tso != NULL)
 512                 return EISCONN;
 513         if (nbp->nbp_laddr == NULL)
 514                 return EINVAL;
 515         slen = sap->sa_len;
 516         if (slen < NB_MINSALEN)
 517                 return EINVAL;
 518         if (nbp->nbp_paddr) {
 519                 kfree(nbp->nbp_paddr, M_SONAME);
 520                 nbp->nbp_paddr = NULL;
 521         }
 522         snb = (struct sockaddr_nb*)dup_sockaddr(sap);
 523         if (snb == NULL)
 524                 return ENOMEM;
 525         nbp->nbp_paddr = snb;
 526         sin = snb->snb_addrin;
 527         getnanotime(&ts1);
 528         error = nb_connect_in(nbp, &sin, td);
 529         if (error)
 530                 return error;
 531         getnanotime(&ts2);
 532         timespecsub(&ts2, &ts1);
 533         if (ts2.tv_sec == 0 && ts2.tv_sec == 0)
 534                 ts2.tv_sec = 1;
 535         nbp->nbp_timo = ts2;
 536         timespecadd(&nbp->nbp_timo, &ts2);
 537         timespecadd(&nbp->nbp_timo, &ts2);
 538         timespecadd(&nbp->nbp_timo, &ts2);      /*  * 4 */
 539         error = nbssn_rq_request(nbp, td);
 540         if (error)
 541                 smb_nbst_disconnect(vcp, td);
 542         return error;
 543 }
 544
 545 static int
 546 smb_nbst_disconnect(struct smb_vc *vcp, struct thread *td)
 547 {
 548         struct nbpcb *nbp = vcp->vc_tdata;
 549         struct socket *so;
 550
 551         if (nbp == NULL || nbp->nbp_tso == NULL)
 552                 return ENOTCONN;
 553         if ((so = nbp->nbp_tso) != NULL) {
 554                 nbp->nbp_flags &= ~NBF_CONNECTED;
 555                 nbp->nbp_tso = NULL;
 556                 soshutdown(so, SHUT_RDWR);
 557                 soclose(so, FNONBLOCK);
 558         }
 559         if (nbp->nbp_state != NBST_RETARGET) {
 560                 nbp->nbp_state = NBST_CLOSED;
 561         }
 562         return 0;
 563 }
 564
 565 static int
 566 smb_nbst_send(struct smb_vc *vcp, struct mbuf *m0, struct thread *td)
 567 {
 568         struct nbpcb *nbp = vcp->vc_tdata;
 569         int error;
 570
 571         if (nbp->nbp_state != NBST_SESSION) {
 572                 error = ENOTCONN;
 573                 goto abort;
 574         }
 575         M_PREPEND(m0, 4, MB_TRYWAIT);
 576         if (m0 == NULL)
 577                 return ENOBUFS;
 578         nb_sethdr(m0, NB_SSN_MESSAGE, m_fixhdr(m0) - 4);
 579         error = nb_sosend(nbp->nbp_tso, m0, 0, td);
 580         return error;
 581 abort:
 582         if (m0)
 583                 m_freem(m0);
 584         return error;
 585 }
 586
 587
 588 static int
 589 smb_nbst_recv(struct smb_vc *vcp, struct mbuf **mpp, struct thread *td)
 590 {
 591         struct nbpcb *nbp = vcp->vc_tdata;
 592         u_int8_t rpcode;
 593         int error, rplen;
 594
 595         nbp->nbp_flags |= NBF_RECVLOCK;
 596         error = nbssn_recv(nbp, mpp, &rplen, &rpcode, td);
 597         nbp->nbp_flags &= ~NBF_RECVLOCK;
 598         return error;
 599 }
 600
 601 static void
 602 smb_nbst_timo(struct smb_vc *vcp)
 603 {
 604         return;
 605 }
 606
 607 static void
 608 smb_nbst_intr(struct smb_vc *vcp)
 609 {
 610         struct nbpcb *nbp = vcp->vc_tdata;
 611
 612         if (nbp == NULL || nbp->nbp_tso == NULL)
 613                 return;
 614         sorwakeup(nbp->nbp_tso);
 615         sowwakeup(nbp->nbp_tso);
 616 }
 617
 618 static int
 619 smb_nbst_getparam(struct smb_vc *vcp, int param, void *data)
 620 {
 621         struct nbpcb *nbp = vcp->vc_tdata;
 622
 623         switch (param) {
 624             case SMBTP_SNDSZ:
 625                 *(int*)data = nbp->nbp_sndbuf;
 626                 break;
 627             case SMBTP_RCVSZ:
 628                 *(int*)data = nbp->nbp_rcvbuf;
 629                 break;
 630             case SMBTP_TIMEOUT:
 631                 *(struct timespec*)data = nbp->nbp_timo;
 632                 break;
 633             default:
 634                 return EINVAL;
 635         }
 636         return 0;
 637 }
 638
 639 static int
 640 smb_nbst_setparam(struct smb_vc *vcp, int param, void *data)
 641 {
 642         struct nbpcb *nbp = vcp->vc_tdata;
 643
 644         switch (param) {
 645             case SMBTP_SELECTID:
 646                 nbp->nbp_selectid = data;
 647                 break;
 648             default:
 649                 return EINVAL;
 650         }
 651         return 0;
 652 }
 653
 654 /*
 655  * Check for fatal errors
 656  */
 657 static int
 658 smb_nbst_fatal(struct smb_vc *vcp, int error)
 659 {
 660         switch (error) {
 661             case ENOTCONN:
 662             case ENETRESET:
 663             case ECONNABORTED:
 664                 return 1;
 665         }
 666         return 0;
 667 }
 668
 669
 670 struct smb_tran_desc smb_tran_nbtcp_desc = {
 671         SMBT_NBTCP,
 672         smb_nbst_create, smb_nbst_done,
 673         smb_nbst_bind, smb_nbst_connect, smb_nbst_disconnect,
 674         smb_nbst_send, smb_nbst_recv,
 675         smb_nbst_timo, smb_nbst_intr,
 676         smb_nbst_getparam, smb_nbst_setparam,
 677         smb_nbst_fatal
 678 };
 679