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 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29
30 #include <sys/param.h>
31 #include <sys/condvar.h>
32 #include <sys/kernel.h>
33 #include <sys/lock.h>
34 #include <sys/malloc.h>
35 #include <sys/mbuf.h>
36 #include <sys/poll.h>
37 #include <sys/proc.h>
38 #include <sys/protosw.h>
39 #include <sys/signalvar.h>
40 #include <sys/socket.h>
41 #include <sys/socketvar.h>
42 #include <sys/sx.h>
43 #include <sys/sysctl.h>
44 #include <sys/systm.h>
45 #include <sys/uio.h>
46
47 #include <net/if.h>
48 #include <net/route.h>
49 #include <net/vnet.h>
50
51 #include <netinet/in.h>
52 #include <netinet/tcp.h>
53
54 #include <sys/mchain.h>
55
56 #include <netsmb/netbios.h>
57
58 #include <netsmb/smb.h>
59 #include <netsmb/smb_conn.h>
60 #include <netsmb/smb_tran.h>
61 #include <netsmb/smb_trantcp.h>
62 #include <netsmb/smb_subr.h>
63
64 #define M_NBDATA M_PCB
65
66 static int smb_tcpsndbuf = NB_SNDQ - 1;
67 static int smb_tcprcvbuf = NB_RCVQ - 1;
68
69 SYSCTL_DECL(_net_smb);
70 SYSCTL_INT(_net_smb, OID_AUTO, tcpsndbuf, CTLFLAG_RW, &smb_tcpsndbuf, 0, "");
71 SYSCTL_INT(_net_smb, OID_AUTO, tcprcvbuf, CTLFLAG_RW, &smb_tcprcvbuf, 0, "");
72
73 #define nb_sosend(so,m,flags,td) sosend(so, NULL, 0, m, 0, flags, td)
74
75 static int nbssn_recv(struct nbpcb *nbp, struct mbuf **mpp, int *lenp,
76 u_int8_t *rpcodep, struct thread *td);
77 static int smb_nbst_disconnect(struct smb_vc *vcp, struct thread *td);
78
79 static int
80 nb_setsockopt_int(struct socket *so, int level, int name, int val)
81 {
82 struct sockopt sopt;
83 int error;
84
85 bzero(&sopt, sizeof(sopt));
86 sopt.sopt_level = level;
87 sopt.sopt_name = name;
88 sopt.sopt_val = &val;
89 sopt.sopt_valsize = sizeof(val);
90 CURVNET_SET(so->so_vnet);
91 error = sosetopt(so, &sopt);
92 CURVNET_RESTORE();
93 return error;
94 }
95
96 static int
97 nb_intr(struct nbpcb *nbp, struct proc *p)
98 {
99 return 0;
100 }
101
102 static int
103 nb_upcall(struct socket *so, void *arg, int waitflag)
104 {
105 struct nbpcb *nbp = arg;
106
107 if (arg == NULL || nbp->nbp_selectid == NULL)
108 return (SU_OK);
109 wakeup(nbp->nbp_selectid);
110 return (SU_OK);
111 }
112
113 static int
114 nb_sethdr(struct mbuf *m, u_int8_t type, u_int32_t len)
115 {
116 u_int32_t *p = mtod(m, u_int32_t *);
117
118 *p = htonl((len & 0x1FFFF) | (type << 24));
119 return 0;
120 }
121
122 static int
123 nb_put_name(struct mbchain *mbp, struct sockaddr_nb *snb)
124 {
125 int error;
126 u_char seglen, *cp;
127
128 cp = snb->snb_name;
129 if (*cp == 0)
130 return EINVAL;
131 NBDEBUG("[%s]\n", cp);
132 for (;;) {
133 seglen = (*cp) + 1;
134 error = mb_put_mem(mbp, cp, seglen, MB_MSYSTEM);
135 if (error)
136 return error;
137 if (seglen == 1)
138 break;
139 cp += seglen;
140 }
141 return 0;
142 }
143
144 static int
145 nb_connect_in(struct nbpcb *nbp, struct sockaddr_in *to, struct thread *td)
146 {
147 struct socket *so;
148 int error, s;
149
150 error = socreate(AF_INET, &so, SOCK_STREAM, IPPROTO_TCP,
151 td->td_ucred, td);
152 if (error)
153 return error;
154 nbp->nbp_tso = so;
155 SOCKBUF_LOCK(&so->so_rcv);
156 soupcall_set(so, SO_RCV, nb_upcall, nbp);
157 SOCKBUF_UNLOCK(&so->so_rcv);
158 so->so_rcv.sb_timeo = (5 * hz);
159 so->so_snd.sb_timeo = (5 * hz);
160 error = soreserve(so, nbp->nbp_sndbuf, nbp->nbp_rcvbuf);
161 if (error)
162 goto bad;
163 nb_setsockopt_int(so, SOL_SOCKET, SO_KEEPALIVE, 1);
164 nb_setsockopt_int(so, IPPROTO_TCP, TCP_NODELAY, 1);
165 SOCKBUF_LOCK(&so->so_rcv);
166 so->so_rcv.sb_flags &= ~SB_NOINTR;
167 SOCKBUF_UNLOCK(&so->so_rcv);
168 SOCKBUF_LOCK(&so->so_snd);
169 so->so_snd.sb_flags &= ~SB_NOINTR;
170 SOCKBUF_UNLOCK(&so->so_snd);
171 error = soconnect(so, (struct sockaddr*)to, td);
172 if (error)
173 goto bad;
174 s = splnet();
175 while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) {
176 tsleep(&so->so_timeo, PSOCK, "nbcon", 2 * hz);
177 if ((so->so_state & SS_ISCONNECTING) && so->so_error == 0 &&
178 (error = nb_intr(nbp, td->td_proc)) != 0) {
179 so->so_state &= ~SS_ISCONNECTING;
180 splx(s);
181 goto bad;
182 }
183 }
184 if (so->so_error) {
185 error = so->so_error;
186 so->so_error = 0;
187 splx(s);
188 goto bad;
189 }
190 splx(s);
191 return 0;
192 bad:
193 smb_nbst_disconnect(nbp->nbp_vc, td);
194 return error;
195 }
196
197 static int
198 nbssn_rq_request(struct nbpcb *nbp, struct thread *td)
199 {
200 struct mbchain mb, *mbp = &mb;
201 struct mdchain md, *mdp = &md;
202 struct mbuf *m0;
203 struct timeval tv;
204 struct sockaddr_in sin;
205 u_short port;
206 u_int8_t rpcode;
207 int error, rplen;
208
209 error = mb_init(mbp);
210 if (error)
211 return error;
212 mb_put_uint32le(mbp, 0);
213 nb_put_name(mbp, nbp->nbp_paddr);
214 nb_put_name(mbp, nbp->nbp_laddr);
215 nb_sethdr(mbp->mb_top, NB_SSN_REQUEST, mb_fixhdr(mbp) - 4);
216 error = nb_sosend(nbp->nbp_tso, mbp->mb_top, 0, td);
217 if (!error) {
218 nbp->nbp_state = NBST_RQSENT;
219 }
220 mb_detach(mbp);
221 mb_done(mbp);
222 if (error)
223 return error;
224 TIMESPEC_TO_TIMEVAL(&tv, &nbp->nbp_timo);
225 error = selsocket(nbp->nbp_tso, POLLIN, &tv, td);
226 if (error == EWOULDBLOCK) { /* Timeout */
227 NBDEBUG("initial request timeout\n");
228 return ETIMEDOUT;
229 }
230 if (error) /* restart or interrupt */
231 return error;
232 error = nbssn_recv(nbp, &m0, &rplen, &rpcode, td);
233 if (error) {
234 NBDEBUG("recv() error %d\n", error);
235 return error;
236 }
237 /*
238 * Process NETBIOS reply
239 */
240 if (m0)
241 md_initm(mdp, m0);
242 error = 0;
243 do {
244 if (rpcode == NB_SSN_POSRESP) {
245 nbp->nbp_state = NBST_SESSION;
246 nbp->nbp_flags |= NBF_CONNECTED;
247 break;
248 }
249 if (rpcode != NB_SSN_RTGRESP) {
250 error = ECONNABORTED;
251 break;
252 }
253 if (rplen != 6) {
254 error = ECONNABORTED;
255 break;
256 }
257 md_get_mem(mdp, (caddr_t)&sin.sin_addr, 4, MB_MSYSTEM);
258 md_get_uint16(mdp, &port);
259 sin.sin_port = port;
260 nbp->nbp_state = NBST_RETARGET;
261 smb_nbst_disconnect(nbp->nbp_vc, td);
262 error = nb_connect_in(nbp, &sin, td);
263 if (!error)
264 error = nbssn_rq_request(nbp, td);
265 if (error) {
266 smb_nbst_disconnect(nbp->nbp_vc, td);
267 break;
268 }
269 } while(0);
270 if (m0)
271 md_done(mdp);
272 return error;
273 }
274
275 static int
276 nbssn_recvhdr(struct nbpcb *nbp, int *lenp,
277 u_int8_t *rpcodep, int flags, struct thread *td)
278 {
279 struct socket *so = nbp->nbp_tso;
280 struct uio auio;
281 struct iovec aio;
282 u_int32_t len;
283 int error;
284
285 aio.iov_base = (caddr_t)&len;
286 aio.iov_len = sizeof(len);
287 auio.uio_iov = &aio;
288 auio.uio_iovcnt = 1;
289 auio.uio_segflg = UIO_SYSSPACE;
290 auio.uio_rw = UIO_READ;
291 auio.uio_offset = 0;
292 auio.uio_resid = sizeof(len);
293 auio.uio_td = td;
294 CURVNET_SET(so->so_vnet);
295 error = soreceive(so, (struct sockaddr **)NULL, &auio,
296 (struct mbuf **)NULL, (struct mbuf **)NULL, &flags);
297 CURVNET_RESTORE();
298 if (error)
299 return error;
300 if (auio.uio_resid > 0) {
301 SMBSDEBUG("short reply\n");
302 return EPIPE;
303 }
304 len = ntohl(len);
305 *rpcodep = (len >> 24) & 0xFF;
306 len &= 0x1ffff;
307 if (len > SMB_MAXPKTLEN) {
308 SMBERROR("packet too long (%d)\n", len);
309 return EFBIG;
310 }
311 *lenp = len;
312 return 0;
313 }
314
315 static int
316 nbssn_recv(struct nbpcb *nbp, struct mbuf **mpp, int *lenp,
317 u_int8_t *rpcodep, struct thread *td)
318 {
319 struct socket *so = nbp->nbp_tso;
320 struct uio auio;
321 struct mbuf *m, *tm, *im;
322 u_int8_t rpcode;
323 int len, resid;
324 int error, rcvflg;
325
326 if (so == NULL)
327 return ENOTCONN;
328
329 if (mpp)
330 *mpp = NULL;
331 m = NULL;
332 for(;;) {
333 /*
334 * Poll for a response header.
335 * If we don't have one waiting, return.
336 */
337 len = 0;
338 rpcode = 0;
339 error = nbssn_recvhdr(nbp, &len, &rpcode, MSG_DONTWAIT, td);
340 if ((so->so_state & (SS_ISDISCONNECTING | SS_ISDISCONNECTED)) ||
341 (so->so_rcv.sb_state & SBS_CANTRCVMORE)) {
342 nbp->nbp_state = NBST_CLOSED;
343 NBDEBUG("session closed by peer\n");
344 return ECONNRESET;
345 }
346 if (error)
347 return error;
348 if (len == 0 && nbp->nbp_state != NBST_SESSION)
349 break;
350 /* no data, try again */
351 if (rpcode == NB_SSN_KEEPALIVE)
352 continue;
353
354 /*
355 * Loop, blocking, for data following the response header.
356 *
357 * Note that we can't simply block here with MSG_WAITALL for the
358 * entire response size, as it may be larger than the TCP
359 * slow-start window that the sender employs. This will result
360 * in the sender stalling until the delayed ACK is sent, then
361 * resuming slow-start, resulting in very poor performance.
362 *
363 * Instead, we never request more than NB_SORECEIVE_CHUNK
364 * bytes at a time, resulting in an ack being pushed by
365 * the TCP code at the completion of each call.
366 */
367 resid = len;
368 while (resid > 0) {
369 tm = NULL;
370 rcvflg = MSG_WAITALL;
371 bzero(&auio, sizeof(auio));
372 auio.uio_resid = min(resid, NB_SORECEIVE_CHUNK);
373 auio.uio_td = td;
374 resid -= auio.uio_resid;
375 /*
376 * Spin until we have collected everything in
377 * this chunk.
378 */
379 do {
380 rcvflg = MSG_WAITALL;
381 CURVNET_SET(so->so_vnet);
382 error = soreceive(so, (struct sockaddr **)NULL,
383 &auio, &tm, (struct mbuf **)NULL, &rcvflg);
384 CURVNET_RESTORE();
385 } while (error == EWOULDBLOCK || error == EINTR ||
386 error == ERESTART);
387 if (error)
388 goto out;
389 /* short return guarantees unhappiness */
390 if (auio.uio_resid > 0) {
391 SMBERROR("packet is shorter than expected\n");
392 error = EPIPE;
393 goto out;
394 }
395 /* append received chunk to previous chunk(s) */
396 if (m == NULL) {
397 m = tm;
398 } else {
399 /*
400 * Just glue the new chain on the end.
401 * Consumer will pullup as required.
402 */
403 for (im = m; im->m_next != NULL; im = im->m_next)
404 ;
405 im->m_next = tm;
406 }
407 }
408 /* got a session/message packet? */
409 if (nbp->nbp_state == NBST_SESSION &&
410 rpcode == NB_SSN_MESSAGE)
411 break;
412 /* drop packet and try for another */
413 NBDEBUG("non-session packet %x\n", rpcode);
414 if (m) {
415 m_freem(m);
416 m = NULL;
417 }
418 }
419
420 out:
421 if (error) {
422 if (m)
423 m_freem(m);
424 return error;
425 }
426 if (mpp)
427 *mpp = m;
428 else
429 m_freem(m);
430 *lenp = len;
431 *rpcodep = rpcode;
432 return 0;
433 }
434
435 /*
436 * SMB transport interface
437 */
438 static int
439 smb_nbst_create(struct smb_vc *vcp, struct thread *td)
440 {
441 struct nbpcb *nbp;
442
443 nbp = malloc(sizeof *nbp, M_NBDATA, M_WAITOK);
444 bzero(nbp, sizeof *nbp);
445 nbp->nbp_timo.tv_sec = 15; /* XXX: sysctl ? */
446 nbp->nbp_state = NBST_CLOSED;
447 nbp->nbp_vc = vcp;
448 nbp->nbp_sndbuf = smb_tcpsndbuf;
449 nbp->nbp_rcvbuf = smb_tcprcvbuf;
450 vcp->vc_tdata = nbp;
451 return 0;
452 }
453
454 static int
455 smb_nbst_done(struct smb_vc *vcp, struct thread *td)
456 {
457 struct nbpcb *nbp = vcp->vc_tdata;
458
459 if (nbp == NULL)
460 return ENOTCONN;
461 smb_nbst_disconnect(vcp, td);
462 if (nbp->nbp_laddr)
463 free(nbp->nbp_laddr, M_SONAME);
464 if (nbp->nbp_paddr)
465 free(nbp->nbp_paddr, M_SONAME);
466 free(nbp, M_NBDATA);
467 return 0;
468 }
469
470 static int
471 smb_nbst_bind(struct smb_vc *vcp, struct sockaddr *sap, struct thread *td)
472 {
473 struct nbpcb *nbp = vcp->vc_tdata;
474 struct sockaddr_nb *snb;
475 int error, slen;
476
477 NBDEBUG("\n");
478 error = EINVAL;
479 do {
480 if (nbp->nbp_flags & NBF_LOCADDR)
481 break;
482 /*
483 * It is possible to create NETBIOS name in the kernel,
484 * but nothing prevents us to do it in the user space.
485 */
486 if (sap == NULL)
487 break;
488 slen = sap->sa_len;
489 if (slen < NB_MINSALEN)
490 break;
491 snb = (struct sockaddr_nb*)sodupsockaddr(sap, M_WAITOK);
492 if (snb == NULL) {
493 error = ENOMEM;
494 break;
495 }
496 nbp->nbp_laddr = snb;
497 nbp->nbp_flags |= NBF_LOCADDR;
498 error = 0;
499 } while(0);
500 return error;
501 }
502
503 static int
504 smb_nbst_connect(struct smb_vc *vcp, struct sockaddr *sap, struct thread *td)
505 {
506 struct nbpcb *nbp = vcp->vc_tdata;
507 struct sockaddr_in sin;
508 struct sockaddr_nb *snb;
509 struct timespec ts1, ts2;
510 int error, slen;
511
512 NBDEBUG("\n");
513 if (nbp->nbp_tso != NULL)
514 return EISCONN;
515 if (nbp->nbp_laddr == NULL)
516 return EINVAL;
517 slen = sap->sa_len;
518 if (slen < NB_MINSALEN)
519 return EINVAL;
520 if (nbp->nbp_paddr) {
521 free(nbp->nbp_paddr, M_SONAME);
522 nbp->nbp_paddr = NULL;
523 }
524 snb = (struct sockaddr_nb*)sodupsockaddr(sap, M_WAITOK);
525 if (snb == NULL)
526 return ENOMEM;
527 nbp->nbp_paddr = snb;
528 sin = snb->snb_addrin;
529 getnanotime(&ts1);
530 error = nb_connect_in(nbp, &sin, td);
531 if (error)
532 return error;
533 getnanotime(&ts2);
534 timespecsub(&ts2, &ts1);
535 if (ts2.tv_sec == 0 && ts2.tv_sec == 0)
536 ts2.tv_sec = 1;
537 nbp->nbp_timo = ts2;
538 timespecadd(&nbp->nbp_timo, &ts2);
539 timespecadd(&nbp->nbp_timo, &ts2);
540 timespecadd(&nbp->nbp_timo, &ts2); /* * 4 */
541 error = nbssn_rq_request(nbp, td);
542 if (error)
543 smb_nbst_disconnect(vcp, td);
544 return error;
545 }
546
547 static int
548 smb_nbst_disconnect(struct smb_vc *vcp, struct thread *td)
549 {
550 struct nbpcb *nbp = vcp->vc_tdata;
551 struct socket *so;
552
553 if (nbp == NULL || nbp->nbp_tso == NULL)
554 return ENOTCONN;
555 if ((so = nbp->nbp_tso) != NULL) {
556 nbp->nbp_flags &= ~NBF_CONNECTED;
557 nbp->nbp_tso = (struct socket *)NULL;
558 soshutdown(so, 2);
559 soclose(so);
560 }
561 if (nbp->nbp_state != NBST_RETARGET) {
562 nbp->nbp_state = NBST_CLOSED;
563 }
564 return 0;
565 }
566
567 static int
568 smb_nbst_send(struct smb_vc *vcp, struct mbuf *m0, struct thread *td)
569 {
570 struct nbpcb *nbp = vcp->vc_tdata;
571 int error;
572
573 if (nbp->nbp_state != NBST_SESSION) {
574 error = ENOTCONN;
575 goto abort;
576 }
577 M_PREPEND(m0, 4, M_WAIT);
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
Cache object: f268d141994fb0a4f310f4b4ca30e641
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