2 * Copyright (c) 2000-2001 Boris Popov
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
36 #include <sys/param.h>
37 #include <sys/condvar.h>
38 #include <sys/kernel.h>
40 #include <sys/malloc.h>
44 #include <sys/protosw.h>
45 #include <sys/signalvar.h>
46 #include <sys/socket.h>
47 #include <sys/socketvar.h>
49 #include <sys/sysctl.h>
50 #include <sys/systm.h>
54 #include <net/route.h>
56 #include <netinet/in.h>
57 #include <netinet/tcp.h>
59 #include <sys/mchain.h>
61 #include <netsmb/netbios.h>
63 #include <netsmb/smb.h>
64 #include <netsmb/smb_conn.h>
65 #include <netsmb/smb_tran.h>
66 #include <netsmb/smb_trantcp.h>
67 #include <netsmb/smb_subr.h>
69 #define M_NBDATA M_PCB
71 static int smb_tcpsndbuf = NB_SNDQ - 1;
72 static int smb_tcprcvbuf = NB_RCVQ - 1;
74 SYSCTL_DECL(_net_smb);
75 SYSCTL_INT(_net_smb, OID_AUTO, tcpsndbuf, CTLFLAG_RW, &smb_tcpsndbuf, 0, "");
76 SYSCTL_INT(_net_smb, OID_AUTO, tcprcvbuf, CTLFLAG_RW, &smb_tcprcvbuf, 0, "");
78 #define nb_sosend(so,m,flags,td) sosend(so, NULL, 0, m, 0, flags, td)
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);
85 nb_setsockopt_int(struct socket *so, int level, int name, int val)
89 bzero(&sopt, sizeof(sopt));
90 sopt.sopt_level = level;
91 sopt.sopt_name = name;
93 sopt.sopt_valsize = sizeof(val);
94 return sosetopt(so, &sopt);
98 nbssn_rselect(struct nbpcb *nbp, struct timeval *tv, int events,
101 struct timeval atv, rtv, ttv;
102 int ncoll, timo, error, revents;
106 if (itimerfix(&atv)) {
108 goto done_noproclock;
110 getmicrouptime(&rtv);
111 timevaladd(&atv, &rtv);
119 td->td_flags |= TDF_SELECT;
121 mtx_unlock(&sellock);
123 /* XXX: Should be done when the thread is initialized. */
124 TAILQ_INIT(&td->td_selq);
125 revents = sopoll(nbp->nbp_tso, events, NULL, td);
132 getmicrouptime(&rtv);
133 if (timevalcmp(&rtv, &atv, >=)) {
138 timevalsub(&ttv, &rtv);
142 * An event of our interest may occur during locking a process.
143 * In order to avoid missing the event that occurred during locking
144 * the process, test P_SELECT and rescan file descriptors if
148 if ((td->td_flags & TDF_SELECT) == 0 || nselcoll != ncoll) {
155 error = cv_timedwait(&selwait, &sellock, timo);
157 cv_wait(&selwait, &sellock);
162 clear_selinfo_list(td);
165 td->td_flags &= ~TDF_SELECT;
167 mtx_unlock(&sellock);
170 if (error == ERESTART)
176 nb_intr(struct nbpcb *nbp, struct proc *p)
182 nb_upcall(struct socket *so, void *arg, int waitflag)
184 struct nbpcb *nbp = arg;
186 if (arg == NULL || nbp->nbp_selectid == NULL)
188 wakeup(nbp->nbp_selectid);
192 nb_sethdr(struct mbuf *m, u_int8_t type, u_int32_t len)
194 u_int32_t *p = mtod(m, u_int32_t *);
196 *p = htonl((len & 0x1FFFF) | (type << 24));
201 nb_put_name(struct mbchain *mbp, struct sockaddr_nb *snb)
209 NBDEBUG("[%s]\n", cp);
212 error = mb_put_mem(mbp, cp, seglen, MB_MSYSTEM);
223 nb_connect_in(struct nbpcb *nbp, struct sockaddr_in *to, struct thread *td)
228 error = socreate(AF_INET, &so, SOCK_STREAM, IPPROTO_TCP,
233 so->so_upcallarg = (caddr_t)nbp;
234 so->so_upcall = nb_upcall;
235 SOCKBUF_LOCK(&so->so_rcv);
236 so->so_rcv.sb_flags |= SB_UPCALL;
237 SOCKBUF_UNLOCK(&so->so_rcv);
238 so->so_rcv.sb_timeo = (5 * hz);
239 so->so_snd.sb_timeo = (5 * hz);
240 error = soreserve(so, nbp->nbp_sndbuf, nbp->nbp_rcvbuf);
243 nb_setsockopt_int(so, SOL_SOCKET, SO_KEEPALIVE, 1);
244 nb_setsockopt_int(so, IPPROTO_TCP, TCP_NODELAY, 1);
245 SOCKBUF_LOCK(&so->so_rcv);
246 so->so_rcv.sb_flags &= ~SB_NOINTR;
247 SOCKBUF_UNLOCK(&so->so_rcv);
248 SOCKBUF_LOCK(&so->so_snd);
249 so->so_snd.sb_flags &= ~SB_NOINTR;
250 SOCKBUF_UNLOCK(&so->so_snd);
251 error = soconnect(so, (struct sockaddr*)to, td);
255 while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) {
256 tsleep(&so->so_timeo, PSOCK, "nbcon", 2 * hz);
257 if ((so->so_state & SS_ISCONNECTING) && so->so_error == 0 &&
258 (error = nb_intr(nbp, td->td_proc)) != 0) {
259 so->so_state &= ~SS_ISCONNECTING;
265 error = so->so_error;
273 smb_nbst_disconnect(nbp->nbp_vc, td);
278 nbssn_rq_request(struct nbpcb *nbp, struct thread *td)
280 struct mbchain mb, *mbp = &mb;
281 struct mdchain md, *mdp = &md;
284 struct sockaddr_in sin;
289 error = mb_init(mbp);
292 mb_put_uint32le(mbp, 0);
293 nb_put_name(mbp, nbp->nbp_paddr);
294 nb_put_name(mbp, nbp->nbp_laddr);
295 nb_sethdr(mbp->mb_top, NB_SSN_REQUEST, mb_fixhdr(mbp) - 4);
296 error = nb_sosend(nbp->nbp_tso, mbp->mb_top, 0, td);
298 nbp->nbp_state = NBST_RQSENT;
304 TIMESPEC_TO_TIMEVAL(&tv, &nbp->nbp_timo);
305 error = nbssn_rselect(nbp, &tv, POLLIN, td);
306 if (error == EWOULDBLOCK) { /* Timeout */
307 NBDEBUG("initial request timeout\n");
310 if (error) /* restart or interrupt */
312 error = nbssn_recv(nbp, &m0, &rplen, &rpcode, td);
314 NBDEBUG("recv() error %d\n", error);
318 * Process NETBIOS reply
324 if (rpcode == NB_SSN_POSRESP) {
325 nbp->nbp_state = NBST_SESSION;
326 nbp->nbp_flags |= NBF_CONNECTED;
329 if (rpcode != NB_SSN_RTGRESP) {
330 error = ECONNABORTED;
334 error = ECONNABORTED;
337 md_get_mem(mdp, (caddr_t)&sin.sin_addr, 4, MB_MSYSTEM);
338 md_get_uint16(mdp, &port);
340 nbp->nbp_state = NBST_RETARGET;
341 smb_nbst_disconnect(nbp->nbp_vc, td);
342 error = nb_connect_in(nbp, &sin, td);
344 error = nbssn_rq_request(nbp, td);
346 smb_nbst_disconnect(nbp->nbp_vc, td);
356 nbssn_recvhdr(struct nbpcb *nbp, int *lenp,
357 u_int8_t *rpcodep, int flags, struct thread *td)
359 struct socket *so = nbp->nbp_tso;
365 aio.iov_base = (caddr_t)&len;
366 aio.iov_len = sizeof(len);
369 auio.uio_segflg = UIO_SYSSPACE;
370 auio.uio_rw = UIO_READ;
372 auio.uio_resid = sizeof(len);
374 error = soreceive(so, (struct sockaddr **)NULL, &auio,
375 (struct mbuf **)NULL, (struct mbuf **)NULL, &flags);
378 if (auio.uio_resid > 0) {
379 SMBSDEBUG("short reply\n");
383 *rpcodep = (len >> 24) & 0xFF;
385 if (len > SMB_MAXPKTLEN) {
386 SMBERROR("packet too long (%d)\n", len);
394 nbssn_recv(struct nbpcb *nbp, struct mbuf **mpp, int *lenp,
395 u_int8_t *rpcodep, struct thread *td)
397 struct socket *so = nbp->nbp_tso;
399 struct mbuf *m, *tm, *im;
412 * Poll for a response header.
413 * If we don't have one waiting, return.
417 error = nbssn_recvhdr(nbp, &len, &rpcode, MSG_DONTWAIT, td);
418 if ((so->so_state & (SS_ISDISCONNECTING | SS_ISDISCONNECTED)) ||
419 (so->so_rcv.sb_state & SBS_CANTRCVMORE)) {
420 nbp->nbp_state = NBST_CLOSED;
421 NBDEBUG("session closed by peer\n");
426 if (len == 0 && nbp->nbp_state != NBST_SESSION)
428 /* no data, try again */
429 if (rpcode == NB_SSN_KEEPALIVE)
433 * Loop, blocking, for data following the response header.
435 * Note that we can't simply block here with MSG_WAITALL for the
436 * entire response size, as it may be larger than the TCP
437 * slow-start window that the sender employs. This will result
438 * in the sender stalling until the delayed ACK is sent, then
439 * resuming slow-start, resulting in very poor performance.
441 * Instead, we never request more than NB_SORECEIVE_CHUNK
442 * bytes at a time, resulting in an ack being pushed by
443 * the TCP code at the completion of each call.
448 rcvflg = MSG_WAITALL;
449 bzero(&auio, sizeof(auio));
450 auio.uio_resid = min(resid, NB_SORECEIVE_CHUNK);
452 resid -= auio.uio_resid;
454 * Spin until we have collected everything in
458 rcvflg = MSG_WAITALL;
459 error = soreceive(so, (struct sockaddr **)NULL,
460 &auio, &tm, (struct mbuf **)NULL, &rcvflg);
461 } while (error == EWOULDBLOCK || error == EINTR ||
465 /* short return guarantees unhappiness */
466 if (auio.uio_resid > 0) {
467 SMBERROR("packet is shorter than expected\n");
471 /* append received chunk to previous chunk(s) */
476 * Just glue the new chain on the end.
477 * Consumer will pullup as required.
479 for (im = m; im->m_next != NULL; im = im->m_next)
484 /* got a session/message packet? */
485 if (nbp->nbp_state == NBST_SESSION &&
486 rpcode == NB_SSN_MESSAGE)
488 /* drop packet and try for another */
489 NBDEBUG("non-session packet %x\n", rpcode);
512 * SMB transport interface
515 smb_nbst_create(struct smb_vc *vcp, struct thread *td)
519 MALLOC(nbp, struct nbpcb *, sizeof *nbp, M_NBDATA, M_WAITOK);
520 bzero(nbp, sizeof *nbp);
521 nbp->nbp_timo.tv_sec = 15; /* XXX: sysctl ? */
522 nbp->nbp_state = NBST_CLOSED;
524 nbp->nbp_sndbuf = smb_tcpsndbuf;
525 nbp->nbp_rcvbuf = smb_tcprcvbuf;
531 smb_nbst_done(struct smb_vc *vcp, struct thread *td)
533 struct nbpcb *nbp = vcp->vc_tdata;
537 smb_nbst_disconnect(vcp, td);
539 free(nbp->nbp_laddr, M_SONAME);
541 free(nbp->nbp_paddr, M_SONAME);
547 smb_nbst_bind(struct smb_vc *vcp, struct sockaddr *sap, struct thread *td)
549 struct nbpcb *nbp = vcp->vc_tdata;
550 struct sockaddr_nb *snb;
556 if (nbp->nbp_flags & NBF_LOCADDR)
559 * It is possible to create NETBIOS name in the kernel,
560 * but nothing prevents us to do it in the user space.
565 if (slen < NB_MINSALEN)
567 snb = (struct sockaddr_nb*)sodupsockaddr(sap, M_WAITOK);
572 nbp->nbp_laddr = snb;
573 nbp->nbp_flags |= NBF_LOCADDR;
580 smb_nbst_connect(struct smb_vc *vcp, struct sockaddr *sap, struct thread *td)
582 struct nbpcb *nbp = vcp->vc_tdata;
583 struct sockaddr_in sin;
584 struct sockaddr_nb *snb;
585 struct timespec ts1, ts2;
589 if (nbp->nbp_tso != NULL)
591 if (nbp->nbp_laddr == NULL)
594 if (slen < NB_MINSALEN)
596 if (nbp->nbp_paddr) {
597 free(nbp->nbp_paddr, M_SONAME);
598 nbp->nbp_paddr = NULL;
600 snb = (struct sockaddr_nb*)sodupsockaddr(sap, M_WAITOK);
603 nbp->nbp_paddr = snb;
604 sin = snb->snb_addrin;
606 error = nb_connect_in(nbp, &sin, td);
610 timespecsub(&ts2, &ts1);
611 if (ts2.tv_sec == 0 && ts2.tv_sec == 0)
614 timespecadd(&nbp->nbp_timo, &ts2);
615 timespecadd(&nbp->nbp_timo, &ts2);
616 timespecadd(&nbp->nbp_timo, &ts2); /* * 4 */
617 error = nbssn_rq_request(nbp, td);
619 smb_nbst_disconnect(vcp, td);
624 smb_nbst_disconnect(struct smb_vc *vcp, struct thread *td)
626 struct nbpcb *nbp = vcp->vc_tdata;
629 if (nbp == NULL || nbp->nbp_tso == NULL)
631 if ((so = nbp->nbp_tso) != NULL) {
632 nbp->nbp_flags &= ~NBF_CONNECTED;
633 nbp->nbp_tso = (struct socket *)NULL;
637 if (nbp->nbp_state != NBST_RETARGET) {
638 nbp->nbp_state = NBST_CLOSED;
644 smb_nbst_send(struct smb_vc *vcp, struct mbuf *m0, struct thread *td)
646 struct nbpcb *nbp = vcp->vc_tdata;
649 if (nbp->nbp_state != NBST_SESSION) {
653 M_PREPEND(m0, 4, M_TRYWAIT);
656 nb_sethdr(m0, NB_SSN_MESSAGE, m_fixhdr(m0) - 4);
657 error = nb_sosend(nbp->nbp_tso, m0, 0, td);
667 smb_nbst_recv(struct smb_vc *vcp, struct mbuf **mpp, struct thread *td)
669 struct nbpcb *nbp = vcp->vc_tdata;
673 nbp->nbp_flags |= NBF_RECVLOCK;
674 error = nbssn_recv(nbp, mpp, &rplen, &rpcode, td);
675 nbp->nbp_flags &= ~NBF_RECVLOCK;
680 smb_nbst_timo(struct smb_vc *vcp)
686 smb_nbst_intr(struct smb_vc *vcp)
688 struct nbpcb *nbp = vcp->vc_tdata;
690 if (nbp == NULL || nbp->nbp_tso == NULL)
692 sorwakeup(nbp->nbp_tso);
693 sowwakeup(nbp->nbp_tso);
697 smb_nbst_getparam(struct smb_vc *vcp, int param, void *data)
699 struct nbpcb *nbp = vcp->vc_tdata;
703 *(int*)data = nbp->nbp_sndbuf;
706 *(int*)data = nbp->nbp_rcvbuf;
709 *(struct timespec*)data = nbp->nbp_timo;
718 smb_nbst_setparam(struct smb_vc *vcp, int param, void *data)
720 struct nbpcb *nbp = vcp->vc_tdata;
724 nbp->nbp_selectid = data;
733 * Check for fatal errors
736 smb_nbst_fatal(struct smb_vc *vcp, int error)
748 struct smb_tran_desc smb_tran_nbtcp_desc = {
750 smb_nbst_create, smb_nbst_done,
751 smb_nbst_bind, smb_nbst_connect, smb_nbst_disconnect,
752 smb_nbst_send, smb_nbst_recv,
753 smb_nbst_timo, smb_nbst_intr,
754 smb_nbst_getparam, smb_nbst_setparam,