Initial import from FreeBSD RELENG_4:
[dragonfly.git] / sys / netproto / smb / smb_trantcp.c
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MD
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 */
34#include <sys/param.h>
35#include <sys/systm.h>
36#include <sys/kernel.h>
37#include <sys/malloc.h>
38#include <sys/mbuf.h>
39#include <sys/proc.h>
40#include <sys/protosw.h>
41#include <sys/socket.h>
42#include <sys/socketvar.h>
43#include <sys/poll.h>
44#include <sys/uio.h>
45#include <sys/sysctl.h>
46
47#include <net/if.h>
48#include <net/route.h>
49
50#include <netinet/in.h>
51#include <netinet/tcp.h>
52
53#include <sys/mchain.h>
54
55#include <netsmb/netbios.h>
56
57#include <netsmb/smb.h>
58#include <netsmb/smb_conn.h>
59#include <netsmb/smb_tran.h>
60#include <netsmb/smb_trantcp.h>
61#include <netsmb/smb_subr.h>
62
63#define M_NBDATA M_PCB
64
65static int smb_tcpsndbuf = 10 * 1024;
66static int smb_tcprcvbuf = 10 * 1024;
67
68SYSCTL_DECL(_net_smb);
69SYSCTL_INT(_net_smb, OID_AUTO, tcpsndbuf, CTLFLAG_RW, &smb_tcpsndbuf, 0, "");
70SYSCTL_INT(_net_smb, OID_AUTO, tcprcvbuf, CTLFLAG_RW, &smb_tcprcvbuf, 0, "");
71
72#define nb_sosend(so,m,flags,p) (so)->so_proto->pr_usrreqs->pru_sosend( \
73 so, NULL, 0, m, 0, flags, p)
74
75static int nbssn_recv(struct nbpcb *nbp, struct mbuf **mpp, int *lenp,
76 u_int8_t *rpcodep, struct proc *p);
77static int smb_nbst_disconnect(struct smb_vc *vcp, struct proc *p);
78
79static int
80nb_setsockopt_int(struct socket *so, int level, int name, int val)
81{
82 struct sockopt sopt;
83
84 bzero(&sopt, sizeof(sopt));
85 sopt.sopt_level = level;
86 sopt.sopt_name = name;
87 sopt.sopt_val = &val;
88 sopt.sopt_valsize = sizeof(val);
89 return sosetopt(so, &sopt);
90}
91
92static __inline int
93nb_poll(struct nbpcb *nbp, int events, struct proc *p)
94{
95 return nbp->nbp_tso->so_proto->pr_usrreqs->pru_sopoll(nbp->nbp_tso,
96 events, NULL, p);
97}
98
99static int
100nbssn_rselect(struct nbpcb *nbp, struct timeval *tv, int events, struct proc *p)
101{
102 struct timeval atv, rtv, ttv;
103 int s, timo, error;
104
105 if (tv) {
106 atv = *tv;
107 if (itimerfix(&atv)) {
108 error = EINVAL;
109 goto done;
110 }
111 getmicrouptime(&rtv);
112 timevaladd(&atv, &rtv);
113 }
114 timo = 0;
115retry:
116 p->p_flag |= P_SELECT;
117 error = nb_poll(nbp, events, p);
118 if (error) {
119 error = 0;
120 goto done;
121 }
122 if (tv) {
123 getmicrouptime(&rtv);
124 if (timevalcmp(&rtv, &atv, >=))
125 goto done;
126 ttv = atv;
127 timevalsub(&ttv, &rtv);
128 timo = tvtohz(&ttv);
129 }
130 s = splhigh();
131 if ((p->p_flag & P_SELECT) == 0) {
132 splx(s);
133 goto retry;
134 }
135 p->p_flag &= ~P_SELECT;
136 error = tsleep((caddr_t)&selwait, PSOCK, "nbsel", timo);
137 splx(s);
138done:
139 p->p_flag &= ~P_SELECT;
140 if (error == ERESTART)
141 return 0;
142 return error;
143}
144
145static int
146nb_intr(struct nbpcb *nbp, struct proc *p)
147{
148 return 0;
149}
150
151static void
152nb_upcall(struct socket *so, void *arg, int waitflag)
153{
154 struct nbpcb *nbp = arg;
155
156 if (arg == NULL || nbp->nbp_selectid == NULL)
157 return;
158 wakeup(nbp->nbp_selectid);
159}
160
161static int
162nb_sethdr(struct mbuf *m, u_int8_t type, u_int32_t len)
163{
164 u_int32_t *p = mtod(m, u_int32_t *);
165
166 *p = htonl((len & 0x1FFFF) | (type << 24));
167 return 0;
168}
169
170static int
171nb_put_name(struct mbchain *mbp, struct sockaddr_nb *snb)
172{
173 int error;
174 u_char seglen, *cp;
175
176 cp = snb->snb_name;
177 if (*cp == 0)
178 return EINVAL;
179 NBDEBUG("[%s]\n", cp);
180 for (;;) {
181 seglen = (*cp) + 1;
182 error = mb_put_mem(mbp, cp, seglen, MB_MSYSTEM);
183 if (error)
184 return error;
185 if (seglen == 1)
186 break;
187 cp += seglen;
188 }
189 return 0;
190}
191
192static int
193nb_connect_in(struct nbpcb *nbp, struct sockaddr_in *to, struct proc *p)
194{
195 struct socket *so;
196 int error, s;
197
198 error = socreate(AF_INET, &so, SOCK_STREAM, IPPROTO_TCP, p);
199 if (error)
200 return error;
201 nbp->nbp_tso = so;
202 so->so_upcallarg = (caddr_t)nbp;
203 so->so_upcall = nb_upcall;
204 so->so_rcv.sb_flags |= SB_UPCALL;
205 so->so_rcv.sb_timeo = (5 * hz);
206 so->so_snd.sb_timeo = (5 * hz);
207 error = soreserve(so, nbp->nbp_sndbuf, nbp->nbp_rcvbuf);
208 if (error)
209 goto bad;
210 nb_setsockopt_int(so, SOL_SOCKET, SO_KEEPALIVE, 1);
211 nb_setsockopt_int(so, IPPROTO_TCP, TCP_NODELAY, 1);
212 so->so_rcv.sb_flags &= ~SB_NOINTR;
213 so->so_snd.sb_flags &= ~SB_NOINTR;
214 error = soconnect(so, (struct sockaddr*)to, p);
215 if (error)
216 goto bad;
217 s = splnet();
218 while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) {
219 tsleep(&so->so_timeo, PSOCK, "nbcon", 2 * hz);
220 if ((so->so_state & SS_ISCONNECTING) && so->so_error == 0 &&
221 (error = nb_intr(nbp, p)) != 0) {
222 so->so_state &= ~SS_ISCONNECTING;
223 splx(s);
224 goto bad;
225 }
226 }
227 if (so->so_error) {
228 error = so->so_error;
229 so->so_error = 0;
230 splx(s);
231 goto bad;
232 }
233 splx(s);
234 return 0;
235bad:
236 smb_nbst_disconnect(nbp->nbp_vc, p);
237 return error;
238}
239
240static int
241nbssn_rq_request(struct nbpcb *nbp, struct proc *p)
242{
243 struct mbchain mb, *mbp = &mb;
244 struct mdchain md, *mdp = &md;
245 struct mbuf *m0;
246 struct timeval tv;
247 struct sockaddr_in sin;
248 u_short port;
249 u_int8_t rpcode;
250 int error, rplen;
251
252 error = mb_init(mbp);
253 if (error)
254 return error;
255 mb_put_uint32le(mbp, 0);
256 nb_put_name(mbp, nbp->nbp_paddr);
257 nb_put_name(mbp, nbp->nbp_laddr);
258 nb_sethdr(mbp->mb_top, NB_SSN_REQUEST, mb_fixhdr(mbp) - 4);
259 error = nb_sosend(nbp->nbp_tso, mbp->mb_top, 0, p);
260 if (!error) {
261 nbp->nbp_state = NBST_RQSENT;
262 }
263 mb_detach(mbp);
264 mb_done(mbp);
265 if (error)
266 return error;
267 TIMESPEC_TO_TIMEVAL(&tv, &nbp->nbp_timo);
268 error = nbssn_rselect(nbp, &tv, POLLIN, p);
269 if (error == EWOULDBLOCK) { /* Timeout */
270 NBDEBUG("initial request timeout\n");
271 return ETIMEDOUT;
272 }
273 if (error) /* restart or interrupt */
274 return error;
275 error = nbssn_recv(nbp, &m0, &rplen, &rpcode, p);
276 if (error) {
277 NBDEBUG("recv() error %d\n", error);
278 return error;
279 }
280 /*
281 * Process NETBIOS reply
282 */
283 if (m0)
284 md_initm(mdp, m0);
285 error = 0;
286 do {
287 if (rpcode == NB_SSN_POSRESP) {
288 nbp->nbp_state = NBST_SESSION;
289 nbp->nbp_flags |= NBF_CONNECTED;
290 break;
291 }
292 if (rpcode != NB_SSN_RTGRESP) {
293 error = ECONNABORTED;
294 break;
295 }
296 if (rplen != 6) {
297 error = ECONNABORTED;
298 break;
299 }
300 md_get_mem(mdp, (caddr_t)&sin.sin_addr, 4, MB_MSYSTEM);
301 md_get_uint16(mdp, &port);
302 sin.sin_port = port;
303 nbp->nbp_state = NBST_RETARGET;
304 smb_nbst_disconnect(nbp->nbp_vc, p);
305 error = nb_connect_in(nbp, &sin, p);
306 if (!error)
307 error = nbssn_rq_request(nbp, p);
308 if (error) {
309 smb_nbst_disconnect(nbp->nbp_vc, p);
310 break;
311 }
312 } while(0);
313 if (m0)
314 md_done(mdp);
315 return error;
316}
317
318static int
319nbssn_recvhdr(struct nbpcb *nbp, int *lenp,
320 u_int8_t *rpcodep, int flags, struct proc *p)
321{
322 struct socket *so = nbp->nbp_tso;
323 struct uio auio;
324 struct iovec aio;
325 u_int32_t len;
326 int error;
327
328 aio.iov_base = (caddr_t)&len;
329 aio.iov_len = sizeof(len);
330 auio.uio_iov = &aio;
331 auio.uio_iovcnt = 1;
332 auio.uio_segflg = UIO_SYSSPACE;
333 auio.uio_rw = UIO_READ;
334 auio.uio_offset = 0;
335 auio.uio_resid = sizeof(len);
336 auio.uio_procp = p;
337 error = so->so_proto->pr_usrreqs->pru_soreceive
338 (so, (struct sockaddr **)NULL, &auio,
339 (struct mbuf **)NULL, (struct mbuf **)NULL, &flags);
340 if (error)
341 return error;
342 if (auio.uio_resid > 0) {
343 SMBSDEBUG("short reply\n");
344 return EPIPE;
345 }
346 len = ntohl(len);
347 *rpcodep = (len >> 24) & 0xFF;
348 len &= 0x1ffff;
349 if (len > SMB_MAXPKTLEN) {
350 SMBERROR("packet too long (%d)\n", len);
351 return EFBIG;
352 }
353 *lenp = len;
354 return 0;
355}
356
357static int
358nbssn_recv(struct nbpcb *nbp, struct mbuf **mpp, int *lenp,
359 u_int8_t *rpcodep, struct proc *p)
360{
361 struct socket *so = nbp->nbp_tso;
362 struct uio auio;
363 struct mbuf *m;
364 u_int8_t rpcode;
365 int len;
366 int error, rcvflg;
367
368 if (so == NULL)
369 return ENOTCONN;
370
371 if (mpp)
372 *mpp = NULL;
373 for(;;) {
374 m = NULL;
375 error = nbssn_recvhdr(nbp, &len, &rpcode, MSG_DONTWAIT, p);
376 if (so->so_state &
377 (SS_ISDISCONNECTING | SS_ISDISCONNECTED | SS_CANTRCVMORE)) {
378 nbp->nbp_state = NBST_CLOSED;
379 NBDEBUG("session closed by peer\n");
380 return ECONNRESET;
381 }
382 if (error)
383 return error;
384 if (len == 0 && nbp->nbp_state != NBST_SESSION)
385 break;
386 if (rpcode == NB_SSN_KEEPALIVE)
387 continue;
388 bzero(&auio, sizeof(auio));
389 auio.uio_resid = len;
390 auio.uio_procp = p;
391 do {
392 rcvflg = MSG_WAITALL;
393 error = so->so_proto->pr_usrreqs->pru_soreceive
394 (so, (struct sockaddr **)NULL,
395 &auio, &m, (struct mbuf **)NULL, &rcvflg);
396 } while (error == EWOULDBLOCK || error == EINTR ||
397 error == ERESTART);
398 if (error)
399 break;
400 if (auio.uio_resid > 0) {
401 SMBERROR("packet is shorter than expected\n");
402 error = EPIPE;
403 break;
404 }
405 if (nbp->nbp_state == NBST_SESSION &&
406 rpcode == NB_SSN_MESSAGE)
407 break;
408 NBDEBUG("non-session packet %x\n", rpcode);
409 if (m)
410 m_freem(m);
411 }
412 if (error) {
413 if (m)
414 m_freem(m);
415 return error;
416 }
417 if (mpp)
418 *mpp = m;
419 else
420 m_freem(m);
421 *lenp = len;
422 *rpcodep = rpcode;
423 return 0;
424}
425
426/*
427 * SMB transport interface
428 */
429static int
430smb_nbst_create(struct smb_vc *vcp, struct proc *p)
431{
432 struct nbpcb *nbp;
433
434 MALLOC(nbp, struct nbpcb *, sizeof *nbp, M_NBDATA, M_WAITOK);
435 bzero(nbp, sizeof *nbp);
436 nbp->nbp_timo.tv_sec = 15; /* XXX: sysctl ? */
437 nbp->nbp_state = NBST_CLOSED;
438 nbp->nbp_vc = vcp;
439 nbp->nbp_sndbuf = smb_tcpsndbuf;
440 nbp->nbp_rcvbuf = smb_tcprcvbuf;
441 vcp->vc_tdata = nbp;
442 return 0;
443}
444
445static int
446smb_nbst_done(struct smb_vc *vcp, struct proc *p)
447{
448 struct nbpcb *nbp = vcp->vc_tdata;
449
450 if (nbp == NULL)
451 return ENOTCONN;
452 smb_nbst_disconnect(vcp, p);
453 if (nbp->nbp_laddr)
454 free(nbp->nbp_laddr, M_SONAME);
455 if (nbp->nbp_paddr)
456 free(nbp->nbp_paddr, M_SONAME);
457 free(nbp, M_NBDATA);
458 return 0;
459}
460
461static int
462smb_nbst_bind(struct smb_vc *vcp, struct sockaddr *sap, struct proc *p)
463{
464 struct nbpcb *nbp = vcp->vc_tdata;
465 struct sockaddr_nb *snb;
466 int error, slen;
467
468 NBDEBUG("\n");
469 error = EINVAL;
470 do {
471 if (nbp->nbp_flags & NBF_LOCADDR)
472 break;
473 /*
474 * It is possible to create NETBIOS name in the kernel,
475 * but nothing prevents us to do it in the user space.
476 */
477 if (sap == NULL)
478 break;
479 slen = sap->sa_len;
480 if (slen < NB_MINSALEN)
481 break;
482 snb = (struct sockaddr_nb*)dup_sockaddr(sap, 1);
483 if (snb == NULL) {
484 error = ENOMEM;
485 break;
486 }
487 nbp->nbp_laddr = snb;
488 nbp->nbp_flags |= NBF_LOCADDR;
489 error = 0;
490 } while(0);
491 return error;
492}
493
494static int
495smb_nbst_connect(struct smb_vc *vcp, struct sockaddr *sap, struct proc *p)
496{
497 struct nbpcb *nbp = vcp->vc_tdata;
498 struct sockaddr_in sin;
499 struct sockaddr_nb *snb;
500 struct timespec ts1, ts2;
501 int error, slen;
502
503 NBDEBUG("\n");
504 if (nbp->nbp_tso != NULL)
505 return EISCONN;
506 if (nbp->nbp_laddr == NULL)
507 return EINVAL;
508 slen = sap->sa_len;
509 if (slen < NB_MINSALEN)
510 return EINVAL;
511 if (nbp->nbp_paddr) {
512 free(nbp->nbp_paddr, M_SONAME);
513 nbp->nbp_paddr = NULL;
514 }
515 snb = (struct sockaddr_nb*)dup_sockaddr(sap, 1);
516 if (snb == NULL)
517 return ENOMEM;
518 nbp->nbp_paddr = snb;
519 sin = snb->snb_addrin;
520 getnanotime(&ts1);
521 error = nb_connect_in(nbp, &sin, p);
522 if (error)
523 return error;
524 getnanotime(&ts2);
525 timespecsub(&ts2, &ts1);
526 if (ts2.tv_sec == 0 && ts2.tv_sec == 0)
527 ts2.tv_sec = 1;
528 nbp->nbp_timo = ts2;
529 timespecadd(&nbp->nbp_timo, &ts2);
530 timespecadd(&nbp->nbp_timo, &ts2);
531 timespecadd(&nbp->nbp_timo, &ts2); /* * 4 */
532 error = nbssn_rq_request(nbp, p);
533 if (error)
534 smb_nbst_disconnect(vcp, p);
535 return error;
536}
537
538static int
539smb_nbst_disconnect(struct smb_vc *vcp, struct proc *p)
540{
541 struct nbpcb *nbp = vcp->vc_tdata;
542 struct socket *so;
543
544 if (nbp == NULL || nbp->nbp_tso == NULL)
545 return ENOTCONN;
546 if ((so = nbp->nbp_tso) != NULL) {
547 nbp->nbp_flags &= ~NBF_CONNECTED;
548 nbp->nbp_tso = (struct socket *)NULL;
549 soshutdown(so, 2);
550 soclose(so);
551 }
552 if (nbp->nbp_state != NBST_RETARGET) {
553 nbp->nbp_state = NBST_CLOSED;
554 }
555 return 0;
556}
557
558static int
559smb_nbst_send(struct smb_vc *vcp, struct mbuf *m0, struct proc *p)
560{
561 struct nbpcb *nbp = vcp->vc_tdata;
562 int error;
563
564 if (nbp->nbp_state != NBST_SESSION) {
565 error = ENOTCONN;
566 goto abort;
567 }
568 M_PREPEND(m0, 4, M_WAITOK);
569 if (m0 == NULL)
570 return ENOBUFS;
571 nb_sethdr(m0, NB_SSN_MESSAGE, m_fixhdr(m0) - 4);
572 error = nb_sosend(nbp->nbp_tso, m0, 0, p);
573 return error;
574abort:
575 if (m0)
576 m_freem(m0);
577 return error;
578}
579
580
581static int
582smb_nbst_recv(struct smb_vc *vcp, struct mbuf **mpp, struct proc *p)
583{
584 struct nbpcb *nbp = vcp->vc_tdata;
585 u_int8_t rpcode;
586 int error, rplen;
587
588 nbp->nbp_flags |= NBF_RECVLOCK;
589 error = nbssn_recv(nbp, mpp, &rplen, &rpcode, p);
590 nbp->nbp_flags &= ~NBF_RECVLOCK;
591 return error;
592}
593
594static void
595smb_nbst_timo(struct smb_vc *vcp)
596{
597 return;
598}
599
600static void
601smb_nbst_intr(struct smb_vc *vcp)
602{
603 struct nbpcb *nbp = vcp->vc_tdata;
604
605 if (nbp == NULL || nbp->nbp_tso == NULL)
606 return;
607 sorwakeup(nbp->nbp_tso);
608 sowwakeup(nbp->nbp_tso);
609}
610
611static int
612smb_nbst_getparam(struct smb_vc *vcp, int param, void *data)
613{
614 struct nbpcb *nbp = vcp->vc_tdata;
615
616 switch (param) {
617 case SMBTP_SNDSZ:
618 *(int*)data = nbp->nbp_sndbuf;
619 break;
620 case SMBTP_RCVSZ:
621 *(int*)data = nbp->nbp_rcvbuf;
622 break;
623 case SMBTP_TIMEOUT:
624 *(struct timespec*)data = nbp->nbp_timo;
625 break;
626 default:
627 return EINVAL;
628 }
629 return 0;
630}
631
632static int
633smb_nbst_setparam(struct smb_vc *vcp, int param, void *data)
634{
635 struct nbpcb *nbp = vcp->vc_tdata;
636
637 switch (param) {
638 case SMBTP_SELECTID:
639 nbp->nbp_selectid = data;
640 break;
641 default:
642 return EINVAL;
643 }
644 return 0;
645}
646
647/*
648 * Check for fatal errors
649 */
650static int
651smb_nbst_fatal(struct smb_vc *vcp, int error)
652{
653 switch (error) {
654 case ENOTCONN:
655 case ENETRESET:
656 case ECONNABORTED:
657 return 1;
658 }
659 return 0;
660}
661
662
663struct smb_tran_desc smb_tran_nbtcp_desc = {
664 SMBT_NBTCP,
665 smb_nbst_create, smb_nbst_done,
666 smb_nbst_bind, smb_nbst_connect, smb_nbst_disconnect,
667 smb_nbst_send, smb_nbst_recv,
668 smb_nbst_timo, smb_nbst_intr,
669 smb_nbst_getparam, smb_nbst_setparam,
670 smb_nbst_fatal
671};
672