xref: /dragonfly/sys/netproto/smb/smb_trantcp.c (revision e1acdbad) 
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 1.11 2004/06/06 19:16:14 dillon 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/sysctl.h>
49 
50 #include <net/if.h>
51 #include <net/route.h>
52 
53 #include <netinet/in.h>
54 #include <netinet/tcp.h>
55 
56 #include <sys/mchain.h>
57 
58 #include "netbios.h"
59 
60 #include "smb.h"
61 #include "smb_conn.h"
62 #include "smb_tran.h"
63 #include "smb_trantcp.h"
64 #include "smb_subr.h"
65 
66 #define M_NBDATA	M_PCB
67 
68 static int smb_tcpsndbuf = 10 * 1024;
69 static int smb_tcprcvbuf = 10 * 1024;
70 
71 SYSCTL_DECL(_net_smb);
72 SYSCTL_INT(_net_smb, OID_AUTO, tcpsndbuf, CTLFLAG_RW, &smb_tcpsndbuf, 0, "");
73 SYSCTL_INT(_net_smb, OID_AUTO, tcprcvbuf, CTLFLAG_RW, &smb_tcprcvbuf, 0, "");
74 
75 #define nb_sosend(so,m,flags,p)					\
76     so_pru_sosend(so, NULL, NULL, m, NULL, flags, td)
77 
78 static int  nbssn_recv(struct nbpcb *nbp, struct mbuf **mpp, int *lenp,
79 	u_int8_t *rpcodep, struct thread *td);
80 static int  smb_nbst_disconnect(struct smb_vc *vcp, struct thread *td);
81 
82 static int
83 nb_setsockopt_int(struct socket *so, int level, int name, int val)
84 {
85 	struct sockopt sopt;
86 
87 	bzero(&sopt, sizeof(sopt));
88 	sopt.sopt_level = level;
89 	sopt.sopt_name = name;
90 	sopt.sopt_val = &val;
91 	sopt.sopt_valsize = sizeof(val);
92 	return sosetopt(so, &sopt);
93 }
94 
95 static __inline int
96 nb_poll(struct nbpcb *nbp, int events, struct thread *td)
97 {
98 	return so_pru_sopoll(nbp->nbp_tso, events, NULL, td);
99 }
100 
101 static int
102 nbssn_rselect(struct nbpcb *nbp, struct timeval *tv, int events, struct thread *td)
103 {
104 	struct proc *p = td->td_proc;
105 	struct timeval atv, rtv, ttv;
106 	int s, timo, error;
107 
108 	if (tv) {
109 		atv = *tv;
110 		if (itimerfix(&atv)) {
111 			error = EINVAL;
112 			goto done;
113 		}
114 		getmicrouptime(&rtv);
115 		timevaladd(&atv, &rtv);
116 	}
117 	timo = 0;
118 	KKASSERT(p);
119 retry:
120 	p->p_flag |= P_SELECT;
121 	error = nb_poll(nbp, events, td);
122 	if (error) {
123 		error = 0;
124 		goto done;
125 	}
126 	if (tv) {
127 		getmicrouptime(&rtv);
128 		if (timevalcmp(&rtv, &atv, >=))
129 			goto done;
130 		ttv = atv;
131 		timevalsub(&ttv, &rtv);
132 		timo = tvtohz_high(&ttv);
133 	}
134 	s = splhigh();
135 	if ((p->p_flag & P_SELECT) == 0) {
136 		splx(s);
137 		goto retry;
138 	}
139 	p->p_flag &= ~P_SELECT;
140 	error = tsleep((caddr_t)&selwait, 0, "nbsel", timo);
141 	splx(s);
142 done:
143 	p->p_flag &= ~P_SELECT;
144 	if (error == ERESTART)
145 		return 0;
146 	return error;
147 }
148 
149 static int
150 nb_intr(struct nbpcb *nbp, struct thread *td)
151 {
152 	return 0;
153 }
154 
155 static void
156 nb_upcall(struct socket *so, void *arg, int waitflag)
157 {
158 	struct nbpcb *nbp = arg;
159 
160 	if (arg == NULL || nbp->nbp_selectid == NULL)
161 		return;
162 	wakeup(nbp->nbp_selectid);
163 }
164 
165 static int
166 nb_sethdr(struct mbuf *m, u_int8_t type, u_int32_t len)
167 {
168 	u_int32_t *p = mtod(m, u_int32_t *);
169 
170 	*p = htonl((len & 0x1FFFF) | (type << 24));
171 	return 0;
172 }
173 
174 static int
175 nb_put_name(struct mbchain *mbp, struct sockaddr_nb *snb)
176 {
177 	int error;
178 	u_char seglen, *cp;
179 
180 	cp = snb->snb_name;
181 	if (*cp == 0)
182 		return EINVAL;
183 	NBDEBUG("[%s]\n", cp);
184 	for (;;) {
185 		seglen = (*cp) + 1;
186 		error = mb_put_mem(mbp, cp, seglen, MB_MSYSTEM);
187 		if (error)
188 			return error;
189 		if (seglen == 1)
190 			break;
191 		cp += seglen;
192 	}
193 	return 0;
194 }
195 
196 static int
197 nb_connect_in(struct nbpcb *nbp, struct sockaddr_in *to, struct thread *td)
198 {
199 	struct socket *so;
200 	int error, s;
201 
202 	error = socreate(AF_INET, &so, SOCK_STREAM, IPPROTO_TCP, td);
203 	if (error)
204 		return error;
205 	nbp->nbp_tso = so;
206 	so->so_upcallarg = (caddr_t)nbp;
207 	so->so_upcall = nb_upcall;
208 	so->so_rcv.sb_flags |= SB_UPCALL;
209 	so->so_rcv.sb_timeo = (5 * hz);
210 	so->so_snd.sb_timeo = (5 * hz);
211 	error = soreserve(so, nbp->nbp_sndbuf, nbp->nbp_rcvbuf,
212 			  &td->td_proc->p_rlimit[RLIMIT_SBSIZE]);
213 	if (error)
214 		goto bad;
215 	nb_setsockopt_int(so, SOL_SOCKET, SO_KEEPALIVE, 1);
216 	nb_setsockopt_int(so, IPPROTO_TCP, TCP_NODELAY, 1);
217 	so->so_rcv.sb_flags &= ~SB_NOINTR;
218 	so->so_snd.sb_flags &= ~SB_NOINTR;
219 	error = soconnect(so, (struct sockaddr*)to, td);
220 	if (error)
221 		goto bad;
222 	s = splnet();
223 	while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) {
224 		tsleep(&so->so_timeo, 0, "nbcon", 2 * hz);
225 		if ((so->so_state & SS_ISCONNECTING) && so->so_error == 0 &&
226 			(error = nb_intr(nbp, td)) != 0) {
227 			so->so_state &= ~SS_ISCONNECTING;
228 			splx(s);
229 			goto bad;
230 		}
231 	}
232 	if (so->so_error) {
233 		error = so->so_error;
234 		so->so_error = 0;
235 		splx(s);
236 		goto bad;
237 	}
238 	splx(s);
239 	return 0;
240 bad:
241 	smb_nbst_disconnect(nbp->nbp_vc, td);
242 	return error;
243 }
244 
245 static int
246 nbssn_rq_request(struct nbpcb *nbp, struct thread *td)
247 {
248 	struct mbchain mb, *mbp = &mb;
249 	struct mdchain md, *mdp = &md;
250 	struct mbuf *m0;
251 	struct timeval tv;
252 	struct sockaddr_in sin;
253 	u_short port;
254 	u_int8_t rpcode;
255 	int error, rplen;
256 
257 	error = mb_init(mbp);
258 	if (error)
259 		return error;
260 	mb_put_uint32le(mbp, 0);
261 	nb_put_name(mbp, nbp->nbp_paddr);
262 	nb_put_name(mbp, nbp->nbp_laddr);
263 	nb_sethdr(mbp->mb_top, NB_SSN_REQUEST, mb_fixhdr(mbp) - 4);
264 	error = nb_sosend(nbp->nbp_tso, mbp->mb_top, 0, td);
265 	if (!error) {
266 		nbp->nbp_state = NBST_RQSENT;
267 	}
268 	mb_detach(mbp);
269 	mb_done(mbp);
270 	if (error)
271 		return error;
272 	TIMESPEC_TO_TIMEVAL(&tv, &nbp->nbp_timo);
273 	error = nbssn_rselect(nbp, &tv, POLLIN, td);
274 	if (error == EWOULDBLOCK) {	/* Timeout */
275 		NBDEBUG("initial request timeout\n");
276 		return ETIMEDOUT;
277 	}
278 	if (error)			/* restart or interrupt */
279 		return error;
280 	error = nbssn_recv(nbp, &m0, &rplen, &rpcode, td);
281 	if (error) {
282 		NBDEBUG("recv() error %d\n", error);
283 		return error;
284 	}
285 	/*
286 	 * Process NETBIOS reply
287 	 */
288 	if (m0)
289 		md_initm(mdp, m0);
290 	error = 0;
291 	do {
292 		if (rpcode == NB_SSN_POSRESP) {
293 			nbp->nbp_state = NBST_SESSION;
294 			nbp->nbp_flags |= NBF_CONNECTED;
295 			break;
296 		}
297 		if (rpcode != NB_SSN_RTGRESP) {
298 			error = ECONNABORTED;
299 			break;
300 		}
301 		if (rplen != 6) {
302 			error = ECONNABORTED;
303 			break;
304 		}
305 		md_get_mem(mdp, (caddr_t)&sin.sin_addr, 4, MB_MSYSTEM);
306 		md_get_uint16(mdp, &port);
307 		sin.sin_port = port;
308 		nbp->nbp_state = NBST_RETARGET;
309 		smb_nbst_disconnect(nbp->nbp_vc, td);
310 		error = nb_connect_in(nbp, &sin, td);
311 		if (!error)
312 			error = nbssn_rq_request(nbp, td);
313 		if (error) {
314 			smb_nbst_disconnect(nbp->nbp_vc, td);
315 			break;
316 		}
317 	} while(0);
318 	if (m0)
319 		md_done(mdp);
320 	return error;
321 }
322 
323 static int
324 nbssn_recvhdr(struct nbpcb *nbp, int *lenp,
325 	u_int8_t *rpcodep, int flags, struct thread *td)
326 {
327 	struct socket *so = nbp->nbp_tso;
328 	struct uio auio;
329 	struct iovec aio;
330 	u_int32_t len;
331 	int error;
332 
333 	aio.iov_base = (caddr_t)&len;
334 	aio.iov_len = sizeof(len);
335 	auio.uio_iov = &aio;
336 	auio.uio_iovcnt = 1;
337 	auio.uio_segflg = UIO_SYSSPACE;
338 	auio.uio_rw = UIO_READ;
339 	auio.uio_offset = 0;
340 	auio.uio_resid = sizeof(len);
341 	auio.uio_td = td;
342 	error = so_pru_soreceive(so, NULL, &auio, NULL, NULL, &flags);
343 	if (error)
344 		return error;
345 	if (auio.uio_resid > 0) {
346 		SMBSDEBUG("short reply\n");
347 		return EPIPE;
348 	}
349 	len = ntohl(len);
350 	*rpcodep = (len >> 24) & 0xFF;
351 	len &= 0x1ffff;
352 	if (len > SMB_MAXPKTLEN) {
353 		SMBERROR("packet too long (%d)\n", len);
354 		return EFBIG;
355 	}
356 	*lenp = len;
357 	return 0;
358 }
359 
360 static int
361 nbssn_recv(struct nbpcb *nbp, struct mbuf **mpp, int *lenp,
362 	u_int8_t *rpcodep, struct thread *td)
363 {
364 	struct socket *so = nbp->nbp_tso;
365 	struct uio auio;
366 	struct mbuf *m;
367 	u_int8_t rpcode;
368 	int len;
369 	int error, rcvflg;
370 
371 	if (so == NULL)
372 		return ENOTCONN;
373 
374 	if (mpp)
375 		*mpp = NULL;
376 	for(;;) {
377 		m = NULL;
378 		error = nbssn_recvhdr(nbp, &len, &rpcode, MSG_DONTWAIT, td);
379 		if (so->so_state &
380 		    (SS_ISDISCONNECTING | SS_ISDISCONNECTED | SS_CANTRCVMORE)) {
381 			nbp->nbp_state = NBST_CLOSED;
382 			NBDEBUG("session closed by peer\n");
383 			return ECONNRESET;
384 		}
385 		if (error)
386 			return error;
387 		if (len == 0 && nbp->nbp_state != NBST_SESSION)
388 			break;
389 		if (rpcode == NB_SSN_KEEPALIVE)
390 			continue;
391 		bzero(&auio, sizeof(auio));
392 		auio.uio_resid = len;
393 		auio.uio_td = td;
394 		do {
395 			rcvflg = MSG_WAITALL;
396 			error = so_pru_soreceive(so, NULL, &auio, &m, NULL,
397 			    &rcvflg);
398 		} while (error == EWOULDBLOCK || error == EINTR ||
399 				 error == ERESTART);
400 		if (error)
401 			break;
402 		if (auio.uio_resid > 0) {
403 			SMBERROR("packet is shorter than expected\n");
404 			error = EPIPE;
405 			break;
406 		}
407 		if (nbp->nbp_state == NBST_SESSION &&
408 		    rpcode == NB_SSN_MESSAGE)
409 			break;
410 		NBDEBUG("non-session packet %x\n", rpcode);
411 		if (m)
412 			m_freem(m);
413 	}
414 	if (error) {
415 		if (m)
416 			m_freem(m);
417 		return error;
418 	}
419 	if (mpp)
420 		*mpp = m;
421 	else
422 		m_freem(m);
423 	*lenp = len;
424 	*rpcodep = rpcode;
425 	return 0;
426 }
427 
428 /*
429  * SMB transport interface
430  */
431 static int
432 smb_nbst_create(struct smb_vc *vcp, struct thread *td)
433 {
434 	struct nbpcb *nbp;
435 
436 	MALLOC(nbp, struct nbpcb *, sizeof *nbp, M_NBDATA, M_WAITOK);
437 	bzero(nbp, sizeof *nbp);
438 	nbp->nbp_timo.tv_sec = 15;	/* XXX: sysctl ? */
439 	nbp->nbp_state = NBST_CLOSED;
440 	nbp->nbp_vc = vcp;
441 	nbp->nbp_sndbuf = smb_tcpsndbuf;
442 	nbp->nbp_rcvbuf = smb_tcprcvbuf;
443 	vcp->vc_tdata = nbp;
444 	return 0;
445 }
446 
447 static int
448 smb_nbst_done(struct smb_vc *vcp, struct thread *td)
449 {
450 	struct nbpcb *nbp = vcp->vc_tdata;
451 
452 	if (nbp == NULL)
453 		return ENOTCONN;
454 	smb_nbst_disconnect(vcp, td);
455 	if (nbp->nbp_laddr)
456 		free(nbp->nbp_laddr, M_SONAME);
457 	if (nbp->nbp_paddr)
458 		free(nbp->nbp_paddr, M_SONAME);
459 	free(nbp, M_NBDATA);
460 	return 0;
461 }
462 
463 static int
464 smb_nbst_bind(struct smb_vc *vcp, struct sockaddr *sap, struct thread *td)
465 {
466 	struct nbpcb *nbp = vcp->vc_tdata;
467 	struct sockaddr_nb *snb;
468 	int error, slen;
469 
470 	NBDEBUG("\n");
471 	error = EINVAL;
472 	do {
473 		if (nbp->nbp_flags & NBF_LOCADDR)
474 			break;
475 		/*
476 		 * It is possible to create NETBIOS name in the kernel,
477 		 * but nothing prevents us to do it in the user space.
478 		 */
479 		if (sap == NULL)
480 			break;
481 		slen = sap->sa_len;
482 		if (slen < NB_MINSALEN)
483 			break;
484 		snb = (struct sockaddr_nb*)dup_sockaddr(sap);
485 		if (snb == NULL) {
486 			error = ENOMEM;
487 			break;
488 		}
489 		nbp->nbp_laddr = snb;
490 		nbp->nbp_flags |= NBF_LOCADDR;
491 		error = 0;
492 	} while(0);
493 	return error;
494 }
495 
496 static int
497 smb_nbst_connect(struct smb_vc *vcp, struct sockaddr *sap, struct thread *td)
498 {
499 	struct nbpcb *nbp = vcp->vc_tdata;
500 	struct sockaddr_in sin;
501 	struct sockaddr_nb *snb;
502 	struct timespec ts1, ts2;
503 	int error, slen;
504 
505 	NBDEBUG("\n");
506 	if (nbp->nbp_tso != NULL)
507 		return EISCONN;
508 	if (nbp->nbp_laddr == NULL)
509 		return EINVAL;
510 	slen = sap->sa_len;
511 	if (slen < NB_MINSALEN)
512 		return EINVAL;
513 	if (nbp->nbp_paddr) {
514 		free(nbp->nbp_paddr, M_SONAME);
515 		nbp->nbp_paddr = NULL;
516 	}
517 	snb = (struct sockaddr_nb*)dup_sockaddr(sap);
518 	if (snb == NULL)
519 		return ENOMEM;
520 	nbp->nbp_paddr = snb;
521 	sin = snb->snb_addrin;
522 	getnanotime(&ts1);
523 	error = nb_connect_in(nbp, &sin, td);
524 	if (error)
525 		return error;
526 	getnanotime(&ts2);
527 	timespecsub(&ts2, &ts1);
528 	if (ts2.tv_sec == 0 && ts2.tv_sec == 0)
529 		ts2.tv_sec = 1;
530 	nbp->nbp_timo = ts2;
531 	timespecadd(&nbp->nbp_timo, &ts2);
532 	timespecadd(&nbp->nbp_timo, &ts2);
533 	timespecadd(&nbp->nbp_timo, &ts2);	/*  * 4 */
534 	error = nbssn_rq_request(nbp, td);
535 	if (error)
536 		smb_nbst_disconnect(vcp, td);
537 	return error;
538 }
539 
540 static int
541 smb_nbst_disconnect(struct smb_vc *vcp, struct thread *td)
542 {
543 	struct nbpcb *nbp = vcp->vc_tdata;
544 	struct socket *so;
545 
546 	if (nbp == NULL || nbp->nbp_tso == NULL)
547 		return ENOTCONN;
548 	if ((so = nbp->nbp_tso) != NULL) {
549 		nbp->nbp_flags &= ~NBF_CONNECTED;
550 		nbp->nbp_tso = (struct socket *)NULL;
551 		soshutdown(so, 2);
552 		soclose(so);
553 	}
554 	if (nbp->nbp_state != NBST_RETARGET) {
555 		nbp->nbp_state = NBST_CLOSED;
556 	}
557 	return 0;
558 }
559 
560 static int
561 smb_nbst_send(struct smb_vc *vcp, struct mbuf *m0, struct thread *td)
562 {
563 	struct nbpcb *nbp = vcp->vc_tdata;
564 	int error;
565 
566 	if (nbp->nbp_state != NBST_SESSION) {
567 		error = ENOTCONN;
568 		goto abort;
569 	}
570 	M_PREPEND(m0, 4, MB_TRYWAIT);
571 	if (m0 == NULL)
572 		return ENOBUFS;
573 	nb_sethdr(m0, NB_SSN_MESSAGE, m_fixhdr(m0) - 4);
574 	error = nb_sosend(nbp->nbp_tso, m0, 0, td);
575 	return error;
576 abort:
577 	if (m0)
578 		m_freem(m0);
579 	return error;
580 }
581 
582 
583 static int
584 smb_nbst_recv(struct smb_vc *vcp, struct mbuf **mpp, struct thread *td)
585 {
586 	struct nbpcb *nbp = vcp->vc_tdata;
587 	u_int8_t rpcode;
588 	int error, rplen;
589 
590 	nbp->nbp_flags |= NBF_RECVLOCK;
591 	error = nbssn_recv(nbp, mpp, &rplen, &rpcode, td);
592 	nbp->nbp_flags &= ~NBF_RECVLOCK;
593 	return error;
594 }
595 
596 static void
597 smb_nbst_timo(struct smb_vc *vcp)
598 {
599 	return;
600 }
601 
602 static void
603 smb_nbst_intr(struct smb_vc *vcp)
604 {
605 	struct nbpcb *nbp = vcp->vc_tdata;
606 
607 	if (nbp == NULL || nbp->nbp_tso == NULL)
608 		return;
609 	sorwakeup(nbp->nbp_tso);
610 	sowwakeup(nbp->nbp_tso);
611 }
612 
613 static int
614 smb_nbst_getparam(struct smb_vc *vcp, int param, void *data)
615 {
616 	struct nbpcb *nbp = vcp->vc_tdata;
617 
618 	switch (param) {
619 	    case SMBTP_SNDSZ:
620 		*(int*)data = nbp->nbp_sndbuf;
621 		break;
622 	    case SMBTP_RCVSZ:
623 		*(int*)data = nbp->nbp_rcvbuf;
624 		break;
625 	    case SMBTP_TIMEOUT:
626 		*(struct timespec*)data = nbp->nbp_timo;
627 		break;
628 	    default:
629 		return EINVAL;
630 	}
631 	return 0;
632 }
633 
634 static int
635 smb_nbst_setparam(struct smb_vc *vcp, int param, void *data)
636 {
637 	struct nbpcb *nbp = vcp->vc_tdata;
638 
639 	switch (param) {
640 	    case SMBTP_SELECTID:
641 		nbp->nbp_selectid = data;
642 		break;
643 	    default:
644 		return EINVAL;
645 	}
646 	return 0;
647 }
648 
649 /*
650  * Check for fatal errors
651  */
652 static int
653 smb_nbst_fatal(struct smb_vc *vcp, int error)
654 {
655 	switch (error) {
656 	    case ENOTCONN:
657 	    case ENETRESET:
658 	    case ECONNABORTED:
659 		return 1;
660 	}
661 	return 0;
662 }
663 
664 
665 struct smb_tran_desc smb_tran_nbtcp_desc = {
666 	SMBT_NBTCP,
667 	smb_nbst_create, smb_nbst_done,
668 	smb_nbst_bind, smb_nbst_connect, smb_nbst_disconnect,
669 	smb_nbst_send, smb_nbst_recv,
670 	smb_nbst_timo, smb_nbst_intr,
671 	smb_nbst_getparam, smb_nbst_setparam,
672 	smb_nbst_fatal
673 };
674 
675