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.
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
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
31 #include <sys/condvar.h>
32 #include <sys/kernel.h>
34 #include <sys/malloc.h>
38 #include <sys/protosw.h>
39 #include <sys/signalvar.h>
40 #include <sys/socket.h>
41 #include <sys/socketvar.h>
43 #include <sys/sysctl.h>
44 #include <sys/systm.h>
48 #include <net/route.h>
50 #include <netinet/in.h>
51 #include <netinet/tcp.h>
53 #include <sys/mchain.h>
55 #include <netsmb/netbios.h>
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>
63 #define M_NBDATA M_PCB
65 static int smb_tcpsndbuf = NB_SNDQ - 1;
66 static int smb_tcprcvbuf = NB_RCVQ - 1;
68 SYSCTL_DECL(_net_smb);
69 SYSCTL_INT(_net_smb, OID_AUTO, tcpsndbuf, CTLFLAG_RW, &smb_tcpsndbuf, 0, "");
70 SYSCTL_INT(_net_smb, OID_AUTO, tcprcvbuf, CTLFLAG_RW, &smb_tcprcvbuf, 0, "");
72 #define nb_sosend(so,m,flags,td) sosend(so, NULL, 0, m, 0, flags, td)
74 static int nbssn_recv(struct nbpcb *nbp, struct mbuf **mpp, int *lenp,
75 u_int8_t *rpcodep, struct thread *td);
76 static int smb_nbst_disconnect(struct smb_vc *vcp, struct thread *td);
79 nb_setsockopt_int(struct socket *so, int level, int name, int val)
83 bzero(&sopt, sizeof(sopt));
84 sopt.sopt_level = level;
85 sopt.sopt_name = name;
87 sopt.sopt_valsize = sizeof(val);
88 return sosetopt(so, &sopt);
92 nb_intr(struct nbpcb *nbp, struct proc *p)
98 nb_upcall(struct socket *so, void *arg, int waitflag)
100 struct nbpcb *nbp = arg;
102 if (arg == NULL || nbp->nbp_selectid == NULL)
104 wakeup(nbp->nbp_selectid);
109 nb_sethdr(struct mbuf *m, u_int8_t type, u_int32_t len)
111 u_int32_t *p = mtod(m, u_int32_t *);
113 *p = htonl((len & 0x1FFFF) | (type << 24));
118 nb_put_name(struct mbchain *mbp, struct sockaddr_nb *snb)
126 NBDEBUG("[%s]\n", cp);
129 error = mb_put_mem(mbp, cp, seglen, MB_MSYSTEM);
140 nb_connect_in(struct nbpcb *nbp, struct sockaddr_in *to, struct thread *td)
145 error = socreate(AF_INET, &so, SOCK_STREAM, IPPROTO_TCP,
150 SOCKBUF_LOCK(&so->so_rcv);
151 soupcall_set(so, SO_RCV, nb_upcall, nbp);
152 SOCKBUF_UNLOCK(&so->so_rcv);
153 so->so_rcv.sb_timeo = (5 * hz);
154 so->so_snd.sb_timeo = (5 * hz);
155 error = soreserve(so, nbp->nbp_sndbuf, nbp->nbp_rcvbuf);
158 nb_setsockopt_int(so, SOL_SOCKET, SO_KEEPALIVE, 1);
159 nb_setsockopt_int(so, IPPROTO_TCP, TCP_NODELAY, 1);
160 SOCKBUF_LOCK(&so->so_rcv);
161 so->so_rcv.sb_flags &= ~SB_NOINTR;
162 SOCKBUF_UNLOCK(&so->so_rcv);
163 SOCKBUF_LOCK(&so->so_snd);
164 so->so_snd.sb_flags &= ~SB_NOINTR;
165 SOCKBUF_UNLOCK(&so->so_snd);
166 error = soconnect(so, (struct sockaddr*)to, td);
170 while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) {
171 tsleep(&so->so_timeo, PSOCK, "nbcon", 2 * hz);
172 if ((so->so_state & SS_ISCONNECTING) && so->so_error == 0 &&
173 (error = nb_intr(nbp, td->td_proc)) != 0) {
174 so->so_state &= ~SS_ISCONNECTING;
180 error = so->so_error;
188 smb_nbst_disconnect(nbp->nbp_vc, td);
193 nbssn_rq_request(struct nbpcb *nbp, struct thread *td)
199 struct sockaddr_in sin;
204 mbp = malloc(sizeof(struct mbchain), M_NBDATA, M_WAITOK);
205 mdp = malloc(sizeof(struct mbchain), M_NBDATA, M_WAITOK);
206 error = mb_init(mbp);
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);
218 nbp->nbp_state = NBST_RQSENT;
227 TIMESPEC_TO_TIMEVAL(&tv, &nbp->nbp_timo);
228 error = selsocket(nbp->nbp_tso, POLLIN, &tv, td);
229 if (error == EWOULDBLOCK) { /* Timeout */
230 NBDEBUG("initial request timeout\n");
234 if (error) { /* restart or interrupt */
238 error = nbssn_recv(nbp, &m0, &rplen, &rpcode, td);
240 NBDEBUG("recv() error %d\n", error);
245 * Process NETBIOS reply
251 if (rpcode == NB_SSN_POSRESP) {
252 nbp->nbp_state = NBST_SESSION;
253 nbp->nbp_flags |= NBF_CONNECTED;
256 if (rpcode != NB_SSN_RTGRESP) {
257 error = ECONNABORTED;
261 error = ECONNABORTED;
264 md_get_mem(mdp, (caddr_t)&sin.sin_addr, 4, MB_MSYSTEM);
265 md_get_uint16(mdp, &port);
267 nbp->nbp_state = NBST_RETARGET;
268 smb_nbst_disconnect(nbp->nbp_vc, td);
269 error = nb_connect_in(nbp, &sin, td);
271 error = nbssn_rq_request(nbp, td);
273 smb_nbst_disconnect(nbp->nbp_vc, td);
284 nbssn_recvhdr(struct nbpcb *nbp, int *lenp,
285 u_int8_t *rpcodep, int flags, struct thread *td)
287 struct socket *so = nbp->nbp_tso;
293 aio.iov_base = (caddr_t)&len;
294 aio.iov_len = sizeof(len);
297 auio.uio_segflg = UIO_SYSSPACE;
298 auio.uio_rw = UIO_READ;
300 auio.uio_resid = sizeof(len);
302 error = soreceive(so, (struct sockaddr **)NULL, &auio,
303 (struct mbuf **)NULL, (struct mbuf **)NULL, &flags);
306 if (auio.uio_resid > 0) {
307 SMBSDEBUG("short reply\n");
311 *rpcodep = (len >> 24) & 0xFF;
313 if (len > SMB_MAXPKTLEN) {
314 SMBERROR("packet too long (%d)\n", len);
322 nbssn_recv(struct nbpcb *nbp, struct mbuf **mpp, int *lenp,
323 u_int8_t *rpcodep, struct thread *td)
325 struct socket *so = nbp->nbp_tso;
327 struct mbuf *m, *tm, *im;
340 * Poll for a response header.
341 * If we don't have one waiting, return.
345 error = nbssn_recvhdr(nbp, &len, &rpcode, MSG_DONTWAIT, td);
346 if ((so->so_state & (SS_ISDISCONNECTING | SS_ISDISCONNECTED)) ||
347 (so->so_rcv.sb_state & SBS_CANTRCVMORE)) {
348 nbp->nbp_state = NBST_CLOSED;
349 NBDEBUG("session closed by peer\n");
354 if (len == 0 && nbp->nbp_state != NBST_SESSION)
356 /* no data, try again */
357 if (rpcode == NB_SSN_KEEPALIVE)
361 * Loop, blocking, for data following the response header.
363 * Note that we can't simply block here with MSG_WAITALL for the
364 * entire response size, as it may be larger than the TCP
365 * slow-start window that the sender employs. This will result
366 * in the sender stalling until the delayed ACK is sent, then
367 * resuming slow-start, resulting in very poor performance.
369 * Instead, we never request more than NB_SORECEIVE_CHUNK
370 * bytes at a time, resulting in an ack being pushed by
371 * the TCP code at the completion of each call.
376 rcvflg = MSG_WAITALL;
377 bzero(&auio, sizeof(auio));
378 auio.uio_resid = min(resid, NB_SORECEIVE_CHUNK);
380 resid -= auio.uio_resid;
382 * Spin until we have collected everything in
386 rcvflg = MSG_WAITALL;
387 error = soreceive(so, (struct sockaddr **)NULL,
388 &auio, &tm, (struct mbuf **)NULL, &rcvflg);
389 } while (error == EWOULDBLOCK || error == EINTR ||
393 /* short return guarantees unhappiness */
394 if (auio.uio_resid > 0) {
395 SMBERROR("packet is shorter than expected\n");
399 /* append received chunk to previous chunk(s) */
404 * Just glue the new chain on the end.
405 * Consumer will pullup as required.
407 for (im = m; im->m_next != NULL; im = im->m_next)
412 /* got a session/message packet? */
413 if (nbp->nbp_state == NBST_SESSION &&
414 rpcode == NB_SSN_MESSAGE)
416 /* drop packet and try for another */
417 NBDEBUG("non-session packet %x\n", rpcode);
440 * SMB transport interface
443 smb_nbst_create(struct smb_vc *vcp, struct thread *td)
447 nbp = malloc(sizeof *nbp, M_NBDATA, M_WAITOK);
448 bzero(nbp, sizeof *nbp);
449 nbp->nbp_timo.tv_sec = 15; /* XXX: sysctl ? */
450 nbp->nbp_state = NBST_CLOSED;
452 nbp->nbp_sndbuf = smb_tcpsndbuf;
453 nbp->nbp_rcvbuf = smb_tcprcvbuf;
459 smb_nbst_done(struct smb_vc *vcp, struct thread *td)
461 struct nbpcb *nbp = vcp->vc_tdata;
465 smb_nbst_disconnect(vcp, td);
467 free(nbp->nbp_laddr, M_SONAME);
469 free(nbp->nbp_paddr, M_SONAME);
475 smb_nbst_bind(struct smb_vc *vcp, struct sockaddr *sap, struct thread *td)
477 struct nbpcb *nbp = vcp->vc_tdata;
478 struct sockaddr_nb *snb;
484 if (nbp->nbp_flags & NBF_LOCADDR)
487 * It is possible to create NETBIOS name in the kernel,
488 * but nothing prevents us to do it in the user space.
493 if (slen < NB_MINSALEN)
495 snb = (struct sockaddr_nb*)sodupsockaddr(sap, M_WAITOK);
500 nbp->nbp_laddr = snb;
501 nbp->nbp_flags |= NBF_LOCADDR;
508 smb_nbst_connect(struct smb_vc *vcp, struct sockaddr *sap, struct thread *td)
510 struct nbpcb *nbp = vcp->vc_tdata;
511 struct sockaddr_in sin;
512 struct sockaddr_nb *snb;
513 struct timespec ts1, ts2;
517 if (nbp->nbp_tso != NULL)
519 if (nbp->nbp_laddr == NULL)
522 if (slen < NB_MINSALEN)
524 if (nbp->nbp_paddr) {
525 free(nbp->nbp_paddr, M_SONAME);
526 nbp->nbp_paddr = NULL;
528 snb = (struct sockaddr_nb*)sodupsockaddr(sap, M_WAITOK);
531 nbp->nbp_paddr = snb;
532 sin = snb->snb_addrin;
534 error = nb_connect_in(nbp, &sin, td);
538 timespecsub(&ts2, &ts1);
539 if (ts2.tv_sec == 0) {
544 timespecadd(&nbp->nbp_timo, &ts2);
545 timespecadd(&nbp->nbp_timo, &ts2);
546 timespecadd(&nbp->nbp_timo, &ts2); /* * 4 */
547 error = nbssn_rq_request(nbp, td);
549 smb_nbst_disconnect(vcp, td);
554 smb_nbst_disconnect(struct smb_vc *vcp, struct thread *td)
556 struct nbpcb *nbp = vcp->vc_tdata;
559 if (nbp == NULL || nbp->nbp_tso == NULL)
561 if ((so = nbp->nbp_tso) != NULL) {
562 nbp->nbp_flags &= ~NBF_CONNECTED;
563 nbp->nbp_tso = (struct socket *)NULL;
567 if (nbp->nbp_state != NBST_RETARGET) {
568 nbp->nbp_state = NBST_CLOSED;
574 smb_nbst_send(struct smb_vc *vcp, struct mbuf *m0, struct thread *td)
576 struct nbpcb *nbp = vcp->vc_tdata;
579 if (nbp->nbp_state != NBST_SESSION) {
583 M_PREPEND(m0, 4, M_WAIT);
584 nb_sethdr(m0, NB_SSN_MESSAGE, m_fixhdr(m0) - 4);
585 error = nb_sosend(nbp->nbp_tso, m0, 0, td);
595 smb_nbst_recv(struct smb_vc *vcp, struct mbuf **mpp, struct thread *td)
597 struct nbpcb *nbp = vcp->vc_tdata;
601 nbp->nbp_flags |= NBF_RECVLOCK;
602 error = nbssn_recv(nbp, mpp, &rplen, &rpcode, td);
603 nbp->nbp_flags &= ~NBF_RECVLOCK;
608 smb_nbst_timo(struct smb_vc *vcp)
614 smb_nbst_intr(struct smb_vc *vcp)
616 struct nbpcb *nbp = vcp->vc_tdata;
618 if (nbp == NULL || nbp->nbp_tso == NULL)
620 sorwakeup(nbp->nbp_tso);
621 sowwakeup(nbp->nbp_tso);
625 smb_nbst_getparam(struct smb_vc *vcp, int param, void *data)
627 struct nbpcb *nbp = vcp->vc_tdata;
631 *(int*)data = nbp->nbp_sndbuf;
634 *(int*)data = nbp->nbp_rcvbuf;
637 *(struct timespec*)data = nbp->nbp_timo;
646 smb_nbst_setparam(struct smb_vc *vcp, int param, void *data)
648 struct nbpcb *nbp = vcp->vc_tdata;
652 nbp->nbp_selectid = data;
661 * Check for fatal errors
664 smb_nbst_fatal(struct smb_vc *vcp, int error)
676 struct smb_tran_desc smb_tran_nbtcp_desc = {
678 smb_nbst_create, smb_nbst_done,
679 smb_nbst_bind, smb_nbst_connect, smb_nbst_disconnect,
680 smb_nbst_send, smb_nbst_recv,
681 smb_nbst_timo, smb_nbst_intr,
682 smb_nbst_getparam, smb_nbst_setparam,