2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2000-2001 Boris Popov
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
32 #include <sys/param.h>
33 #include <sys/condvar.h>
34 #include <sys/kernel.h>
36 #include <sys/malloc.h>
40 #include <sys/protosw.h>
41 #include <sys/signalvar.h>
42 #include <sys/socket.h>
43 #include <sys/socketvar.h>
45 #include <sys/sysctl.h>
46 #include <sys/systm.h>
50 #include <net/route.h>
53 #include <netinet/in.h>
54 #include <netinet/tcp.h>
56 #include <sys/mchain.h>
58 #include <netsmb/netbios.h>
60 #include <netsmb/smb.h>
61 #include <netsmb/smb_conn.h>
62 #include <netsmb/smb_tran.h>
63 #include <netsmb/smb_trantcp.h>
64 #include <netsmb/smb_subr.h>
66 #define M_NBDATA M_PCB
68 static int smb_tcpsndbuf = NB_SNDQ - 1;
69 static int smb_tcprcvbuf = NB_RCVQ - 1;
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, "");
75 #define nb_sosend(so,m,flags,td) sosend(so, NULL, 0, m, 0, flags, td)
77 static int nbssn_recv(struct nbpcb *nbp, struct mbuf **mpp, int *lenp,
78 u_int8_t *rpcodep, struct thread *td);
79 static int smb_nbst_disconnect(struct smb_vc *vcp, struct thread *td);
82 nb_setsockopt_int(struct socket *so, int level, int name, int val)
87 bzero(&sopt, sizeof(sopt));
88 sopt.sopt_level = level;
89 sopt.sopt_name = name;
91 sopt.sopt_valsize = sizeof(val);
92 CURVNET_SET(so->so_vnet);
93 error = sosetopt(so, &sopt);
99 nb_intr(struct nbpcb *nbp, struct proc *p)
105 nb_upcall(struct socket *so, void *arg, int waitflag)
107 struct nbpcb *nbp = arg;
109 if (arg == NULL || nbp->nbp_selectid == NULL)
111 wakeup(nbp->nbp_selectid);
116 nb_sethdr(struct mbuf *m, u_int8_t type, u_int32_t len)
118 u_int32_t *p = mtod(m, u_int32_t *);
120 *p = htonl((len & 0x1FFFF) | (type << 24));
125 nb_put_name(struct mbchain *mbp, struct sockaddr_nb *snb)
133 NBDEBUG("[%s]\n", cp);
136 error = mb_put_mem(mbp, cp, seglen, MB_MSYSTEM);
147 nb_connect_in(struct nbpcb *nbp, struct sockaddr_in *to, struct thread *td)
152 error = socreate(AF_INET, &so, SOCK_STREAM, IPPROTO_TCP,
157 SOCKBUF_LOCK(&so->so_rcv);
158 soupcall_set(so, SO_RCV, nb_upcall, nbp);
159 SOCKBUF_UNLOCK(&so->so_rcv);
160 so->so_rcv.sb_timeo = (5 * SBT_1S);
161 so->so_snd.sb_timeo = (5 * SBT_1S);
162 error = soreserve(so, nbp->nbp_sndbuf, nbp->nbp_rcvbuf);
165 nb_setsockopt_int(so, SOL_SOCKET, SO_KEEPALIVE, 1);
166 nb_setsockopt_int(so, IPPROTO_TCP, TCP_NODELAY, 1);
167 SOCKBUF_LOCK(&so->so_rcv);
168 so->so_rcv.sb_flags &= ~SB_NOINTR;
169 SOCKBUF_UNLOCK(&so->so_rcv);
170 SOCKBUF_LOCK(&so->so_snd);
171 so->so_snd.sb_flags &= ~SB_NOINTR;
172 SOCKBUF_UNLOCK(&so->so_snd);
173 error = soconnect(so, (struct sockaddr*)to, td);
177 while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) {
178 tsleep(&so->so_timeo, PSOCK, "nbcon", 2 * hz);
179 if ((so->so_state & SS_ISCONNECTING) && so->so_error == 0 &&
180 (error = nb_intr(nbp, td->td_proc)) != 0) {
181 so->so_state &= ~SS_ISCONNECTING;
187 error = so->so_error;
195 smb_nbst_disconnect(nbp->nbp_vc, td);
200 nbssn_rq_request(struct nbpcb *nbp, struct thread *td)
206 struct sockaddr_in sin;
211 mbp = malloc(sizeof(struct mbchain), M_NBDATA, M_WAITOK);
212 mdp = malloc(sizeof(struct mbchain), M_NBDATA, M_WAITOK);
213 error = mb_init(mbp);
219 mb_put_uint32le(mbp, 0);
220 nb_put_name(mbp, nbp->nbp_paddr);
221 nb_put_name(mbp, nbp->nbp_laddr);
222 nb_sethdr(mbp->mb_top, NB_SSN_REQUEST, mb_fixhdr(mbp) - 4);
223 error = nb_sosend(nbp->nbp_tso, mbp->mb_top, 0, td);
225 nbp->nbp_state = NBST_RQSENT;
234 TIMESPEC_TO_TIMEVAL(&tv, &nbp->nbp_timo);
235 error = selsocket(nbp->nbp_tso, POLLIN, &tv, td);
236 if (error == EWOULDBLOCK) { /* Timeout */
237 NBDEBUG("initial request timeout\n");
241 if (error) { /* restart or interrupt */
245 error = nbssn_recv(nbp, &m0, &rplen, &rpcode, td);
247 NBDEBUG("recv() error %d\n", error);
252 * Process NETBIOS reply
258 if (rpcode == NB_SSN_POSRESP) {
259 nbp->nbp_state = NBST_SESSION;
260 nbp->nbp_flags |= NBF_CONNECTED;
263 if (rpcode != NB_SSN_RTGRESP) {
264 error = ECONNABORTED;
268 error = ECONNABORTED;
271 md_get_mem(mdp, (caddr_t)&sin.sin_addr, 4, MB_MSYSTEM);
272 md_get_uint16(mdp, &port);
274 nbp->nbp_state = NBST_RETARGET;
275 smb_nbst_disconnect(nbp->nbp_vc, td);
276 error = nb_connect_in(nbp, &sin, td);
278 error = nbssn_rq_request(nbp, td);
280 smb_nbst_disconnect(nbp->nbp_vc, td);
291 nbssn_recvhdr(struct nbpcb *nbp, int *lenp,
292 u_int8_t *rpcodep, int flags, struct thread *td)
294 struct socket *so = nbp->nbp_tso;
300 aio.iov_base = (caddr_t)&len;
301 aio.iov_len = sizeof(len);
304 auio.uio_segflg = UIO_SYSSPACE;
305 auio.uio_rw = UIO_READ;
307 auio.uio_resid = sizeof(len);
309 CURVNET_SET(so->so_vnet);
310 error = soreceive(so, (struct sockaddr **)NULL, &auio,
311 (struct mbuf **)NULL, (struct mbuf **)NULL, &flags);
315 if (auio.uio_resid > 0) {
316 SMBSDEBUG("short reply\n");
320 *rpcodep = (len >> 24) & 0xFF;
322 if (len > SMB_MAXPKTLEN) {
323 SMBERROR("packet too long (%d)\n", len);
331 nbssn_recv(struct nbpcb *nbp, struct mbuf **mpp, int *lenp,
332 u_int8_t *rpcodep, struct thread *td)
334 struct socket *so = nbp->nbp_tso;
336 struct mbuf *m, *tm, *im;
349 * Poll for a response header.
350 * If we don't have one waiting, return.
354 error = nbssn_recvhdr(nbp, &len, &rpcode, MSG_DONTWAIT, td);
355 if ((so->so_state & (SS_ISDISCONNECTING | SS_ISDISCONNECTED)) ||
356 (so->so_rcv.sb_state & SBS_CANTRCVMORE)) {
357 nbp->nbp_state = NBST_CLOSED;
358 NBDEBUG("session closed by peer\n");
363 if (len == 0 && nbp->nbp_state != NBST_SESSION)
365 /* no data, try again */
366 if (rpcode == NB_SSN_KEEPALIVE)
370 * Loop, blocking, for data following the response header.
372 * Note that we can't simply block here with MSG_WAITALL for the
373 * entire response size, as it may be larger than the TCP
374 * slow-start window that the sender employs. This will result
375 * in the sender stalling until the delayed ACK is sent, then
376 * resuming slow-start, resulting in very poor performance.
378 * Instead, we never request more than NB_SORECEIVE_CHUNK
379 * bytes at a time, resulting in an ack being pushed by
380 * the TCP code at the completion of each call.
385 rcvflg = MSG_WAITALL;
386 bzero(&auio, sizeof(auio));
387 auio.uio_resid = min(resid, NB_SORECEIVE_CHUNK);
389 resid -= auio.uio_resid;
391 * Spin until we have collected everything in
395 rcvflg = MSG_WAITALL;
396 CURVNET_SET(so->so_vnet);
397 error = soreceive(so, (struct sockaddr **)NULL,
398 &auio, &tm, (struct mbuf **)NULL, &rcvflg);
400 } while (error == EWOULDBLOCK || error == EINTR ||
404 /* short return guarantees unhappiness */
405 if (auio.uio_resid > 0) {
406 SMBERROR("packet is shorter than expected\n");
410 /* append received chunk to previous chunk(s) */
415 * Just glue the new chain on the end.
416 * Consumer will pullup as required.
418 for (im = m; im->m_next != NULL; im = im->m_next)
423 /* got a session/message packet? */
424 if (nbp->nbp_state == NBST_SESSION &&
425 rpcode == NB_SSN_MESSAGE)
427 /* drop packet and try for another */
428 NBDEBUG("non-session packet %x\n", rpcode);
451 * SMB transport interface
454 smb_nbst_create(struct smb_vc *vcp, struct thread *td)
458 nbp = malloc(sizeof *nbp, M_NBDATA, M_WAITOK);
459 bzero(nbp, sizeof *nbp);
460 nbp->nbp_timo.tv_sec = 15; /* XXX: sysctl ? */
461 nbp->nbp_state = NBST_CLOSED;
463 nbp->nbp_sndbuf = smb_tcpsndbuf;
464 nbp->nbp_rcvbuf = smb_tcprcvbuf;
470 smb_nbst_done(struct smb_vc *vcp, struct thread *td)
472 struct nbpcb *nbp = vcp->vc_tdata;
476 smb_nbst_disconnect(vcp, td);
478 free(nbp->nbp_laddr, M_SONAME);
480 free(nbp->nbp_paddr, M_SONAME);
486 smb_nbst_bind(struct smb_vc *vcp, struct sockaddr *sap, struct thread *td)
488 struct nbpcb *nbp = vcp->vc_tdata;
489 struct sockaddr_nb *snb;
495 if (nbp->nbp_flags & NBF_LOCADDR)
498 * It is possible to create NETBIOS name in the kernel,
499 * but nothing prevents us to do it in the user space.
504 if (slen < NB_MINSALEN)
506 snb = (struct sockaddr_nb*)sodupsockaddr(sap, M_WAITOK);
511 nbp->nbp_laddr = snb;
512 nbp->nbp_flags |= NBF_LOCADDR;
519 smb_nbst_connect(struct smb_vc *vcp, struct sockaddr *sap, struct thread *td)
521 struct nbpcb *nbp = vcp->vc_tdata;
522 struct sockaddr_in sin;
523 struct sockaddr_nb *snb;
524 struct timespec ts1, ts2;
528 if (nbp->nbp_tso != NULL)
530 if (nbp->nbp_laddr == NULL)
533 if (slen < NB_MINSALEN)
535 if (nbp->nbp_paddr) {
536 free(nbp->nbp_paddr, M_SONAME);
537 nbp->nbp_paddr = NULL;
539 snb = (struct sockaddr_nb*)sodupsockaddr(sap, M_WAITOK);
542 nbp->nbp_paddr = snb;
543 sin = snb->snb_addrin;
545 error = nb_connect_in(nbp, &sin, td);
549 timespecsub(&ts2, &ts1);
550 if (ts2.tv_sec == 0) {
555 timespecadd(&nbp->nbp_timo, &ts2);
556 timespecadd(&nbp->nbp_timo, &ts2);
557 timespecadd(&nbp->nbp_timo, &ts2); /* * 4 */
558 error = nbssn_rq_request(nbp, td);
560 smb_nbst_disconnect(vcp, td);
565 smb_nbst_disconnect(struct smb_vc *vcp, struct thread *td)
567 struct nbpcb *nbp = vcp->vc_tdata;
570 if (nbp == NULL || nbp->nbp_tso == NULL)
572 if ((so = nbp->nbp_tso) != NULL) {
573 nbp->nbp_flags &= ~NBF_CONNECTED;
574 nbp->nbp_tso = (struct socket *)NULL;
578 if (nbp->nbp_state != NBST_RETARGET) {
579 nbp->nbp_state = NBST_CLOSED;
585 smb_nbst_send(struct smb_vc *vcp, struct mbuf *m0, struct thread *td)
587 struct nbpcb *nbp = vcp->vc_tdata;
590 if (nbp->nbp_state != NBST_SESSION) {
594 M_PREPEND(m0, 4, M_WAITOK);
595 nb_sethdr(m0, NB_SSN_MESSAGE, m_fixhdr(m0) - 4);
596 error = nb_sosend(nbp->nbp_tso, m0, 0, td);
606 smb_nbst_recv(struct smb_vc *vcp, struct mbuf **mpp, struct thread *td)
608 struct nbpcb *nbp = vcp->vc_tdata;
612 nbp->nbp_flags |= NBF_RECVLOCK;
613 error = nbssn_recv(nbp, mpp, &rplen, &rpcode, td);
614 nbp->nbp_flags &= ~NBF_RECVLOCK;
619 smb_nbst_timo(struct smb_vc *vcp)
625 smb_nbst_intr(struct smb_vc *vcp)
627 struct nbpcb *nbp = vcp->vc_tdata;
629 if (nbp == NULL || nbp->nbp_tso == NULL)
631 sorwakeup(nbp->nbp_tso);
632 sowwakeup(nbp->nbp_tso);
636 smb_nbst_getparam(struct smb_vc *vcp, int param, void *data)
638 struct nbpcb *nbp = vcp->vc_tdata;
642 *(int*)data = nbp->nbp_sndbuf;
645 *(int*)data = nbp->nbp_rcvbuf;
648 *(struct timespec*)data = nbp->nbp_timo;
657 smb_nbst_setparam(struct smb_vc *vcp, int param, void *data)
659 struct nbpcb *nbp = vcp->vc_tdata;
663 nbp->nbp_selectid = data;
672 * Check for fatal errors
675 smb_nbst_fatal(struct smb_vc *vcp, int error)
687 struct smb_tran_desc smb_tran_nbtcp_desc = {
689 smb_nbst_create, smb_nbst_done,
690 smb_nbst_bind, smb_nbst_connect, smb_nbst_disconnect,
691 smb_nbst_send, smb_nbst_recv,
692 smb_nbst_timo, smb_nbst_intr,
693 smb_nbst_getparam, smb_nbst_setparam,