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
32 * $FreeBSD: src/sys/netsmb/smb_rq.c,v 1.1.2.2 2002/04/23 03:45:01 bp Exp $
33 * $DragonFly: src/sys/netproto/smb/smb_rq.c,v 1.4 2003/07/06 21:23:53 dillon Exp $
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/kernel.h>
38 #include <sys/malloc.h>
41 #include <sys/sysctl.h>
42 #include <sys/socket.h>
43 #include <sys/socketvar.h>
46 #include <netsmb/smb.h>
47 #include <netsmb/smb_conn.h>
48 #include <netsmb/smb_rq.h>
49 #include <netsmb/smb_subr.h>
50 #include <netsmb/smb_tran.h>
52 MALLOC_DEFINE(M_SMBRQ, "SMBRQ", "SMB request");
54 MODULE_DEPEND(netsmb, libmchain, 1, 1, 1);
56 static int smb_rq_reply(struct smb_rq *rqp);
57 static int smb_rq_enqueue(struct smb_rq *rqp);
58 static int smb_rq_getenv(struct smb_connobj *layer,
59 struct smb_vc **vcpp, struct smb_share **sspp);
60 static int smb_rq_new(struct smb_rq *rqp, u_char cmd);
61 static int smb_t2_reply(struct smb_t2rq *t2p);
64 smb_rq_alloc(struct smb_connobj *layer, u_char cmd, struct smb_cred *scred,
70 MALLOC(rqp, struct smb_rq *, sizeof(*rqp), M_SMBRQ, M_WAITOK);
73 error = smb_rq_init(rqp, layer, cmd, scred);
74 rqp->sr_flags |= SMBR_ALLOCED;
83 static char tzero[12];
86 smb_rq_init(struct smb_rq *rqp, struct smb_connobj *layer, u_char cmd,
87 struct smb_cred *scred)
91 bzero(rqp, sizeof(*rqp));
92 smb_sl_init(&rqp->sr_slock, "srslock");
93 error = smb_rq_getenv(layer, &rqp->sr_vc, &rqp->sr_share);
96 error = smb_vc_access(rqp->sr_vc, scred, SMBM_EXEC);
100 error = smb_share_access(rqp->sr_share, scred, SMBM_EXEC);
104 rqp->sr_cred = scred;
105 rqp->sr_mid = smb_vc_nextmid(rqp->sr_vc);
106 return smb_rq_new(rqp, cmd);
110 smb_rq_new(struct smb_rq *rqp, u_char cmd)
112 struct smb_vc *vcp = rqp->sr_vc;
113 struct mbchain *mbp = &rqp->sr_rq;
118 md_done(&rqp->sr_rp);
119 error = mb_init(mbp);
122 mb_put_mem(mbp, SMB_SIGNATURE, SMB_SIGLEN, MB_MSYSTEM);
123 mb_put_uint8(mbp, cmd);
124 mb_put_uint32le(mbp, 0); /* DosError */
125 mb_put_uint8(mbp, vcp->vc_hflags);
126 mb_put_uint16le(mbp, vcp->vc_hflags2);
127 mb_put_mem(mbp, tzero, 12, MB_MSYSTEM);
128 rqp->sr_rqtid = (u_int16_t*)mb_reserve(mbp, sizeof(u_int16_t));
129 mb_put_uint16le(mbp, 1 /*scred->sc_p->p_pid & 0xffff*/);
130 rqp->sr_rquid = (u_int16_t*)mb_reserve(mbp, sizeof(u_int16_t));
131 mb_put_uint16le(mbp, rqp->sr_mid);
136 smb_rq_done(struct smb_rq *rqp)
138 mb_done(&rqp->sr_rq);
139 md_done(&rqp->sr_rp);
140 smb_sl_destroy(&rqp->sr_slock);
141 if (rqp->sr_flags & SMBR_ALLOCED)
146 * Simple request-reply exchange
149 smb_rq_simple(struct smb_rq *rqp)
151 struct smb_vc *vcp = rqp->sr_vc;
152 int error = EINVAL, i;
154 for (i = 0; i < SMB_MAXRCN; i++) {
155 rqp->sr_flags &= ~SMBR_RESTART;
156 rqp->sr_timo = vcp->vc_timo;
157 rqp->sr_state = SMBRQ_NOTSENT;
158 error = smb_rq_enqueue(rqp);
161 error = smb_rq_reply(rqp);
164 if ((rqp->sr_flags & (SMBR_RESTART | SMBR_NORESTART)) != SMBR_RESTART)
171 smb_rq_enqueue(struct smb_rq *rqp)
173 struct smb_share *ssp = rqp->sr_share;
176 if (ssp == NULL || rqp->sr_cred == &rqp->sr_vc->vc_iod->iod_scred) {
177 return smb_iod_addrq(rqp);
181 if (ssp->ss_flags & SMBS_RECONNECTING) {
182 smb_sleep(&ssp->ss_vcgenid, SMBS_ST_LOCKPTR(ssp),
183 PWAIT | PDROP, "90trcn", hz);
184 if (smb_proc_intr(rqp->sr_cred->scr_td))
188 if (smb_share_valid(ssp) || (ssp->ss_flags & SMBS_CONNECTED) == 0) {
192 error = smb_iod_request(rqp->sr_vc->vc_iod,
193 SMBIOD_EV_TREECONNECT | SMBIOD_EV_SYNC, ssp);
197 error = smb_iod_addrq(rqp);
205 smb_rq_wstart(struct smb_rq *rqp)
207 rqp->sr_wcount = mb_reserve(&rqp->sr_rq, sizeof(u_int8_t));
208 rqp->sr_rq.mb_count = 0;
212 smb_rq_wend(struct smb_rq *rqp)
214 if (rqp->sr_wcount == NULL) {
215 SMBERROR("no wcount\n"); /* actually panic */
218 if (rqp->sr_rq.mb_count & 1)
219 SMBERROR("odd word count\n");
220 *rqp->sr_wcount = rqp->sr_rq.mb_count / 2;
224 smb_rq_bstart(struct smb_rq *rqp)
226 rqp->sr_bcount = (u_short*)mb_reserve(&rqp->sr_rq, sizeof(u_short));
227 rqp->sr_rq.mb_count = 0;
231 smb_rq_bend(struct smb_rq *rqp)
235 if (rqp->sr_bcount == NULL) {
236 SMBERROR("no bcount\n"); /* actually panic */
239 bcnt = rqp->sr_rq.mb_count;
241 SMBERROR("byte count too large (%d)\n", bcnt);
242 *rqp->sr_bcount = bcnt;
246 smb_rq_intr(struct smb_rq *rqp)
248 struct thread *td = rqp->sr_cred->scr_td;
250 if (rqp->sr_flags & SMBR_INTR)
252 return smb_proc_intr(td);
256 smb_rq_getrequest(struct smb_rq *rqp, struct mbchain **mbpp)
263 smb_rq_getreply(struct smb_rq *rqp, struct mdchain **mbpp)
270 smb_rq_getenv(struct smb_connobj *layer,
271 struct smb_vc **vcpp, struct smb_share **sspp)
273 struct smb_vc *vcp = NULL;
274 struct smb_share *ssp = NULL;
275 struct smb_connobj *cp;
278 switch (layer->co_level) {
281 if (layer->co_parent == NULL) {
282 SMBERROR("zombie VC %s\n", vcp->vc_srvname);
289 cp = layer->co_parent;
291 SMBERROR("zombie share %s\n", ssp->ss_name);
295 error = smb_rq_getenv(cp, &vcp, NULL);
300 SMBERROR("invalid layer %d passed\n", layer->co_level);
311 * Wait for reply on the request
314 smb_rq_reply(struct smb_rq *rqp)
316 struct mdchain *mdp = &rqp->sr_rp;
319 int error, rperror = 0;
321 error = smb_iod_waitrq(rqp);
324 error = md_get_uint32(mdp, &tdw);
327 error = md_get_uint8(mdp, &tb);
328 if (rqp->sr_vc->vc_hflags2 & SMB_FLAGS2_ERR_STATUS) {
329 error = md_get_uint32le(mdp, &rqp->sr_error);
331 error = md_get_uint8(mdp, &rqp->sr_errclass);
332 error = md_get_uint8(mdp, &tb);
333 error = md_get_uint16le(mdp, &rqp->sr_serror);
335 rperror = smb_maperror(rqp->sr_errclass, rqp->sr_serror);
337 error = md_get_uint8(mdp, &rqp->sr_rpflags);
338 error = md_get_uint16le(mdp, &rqp->sr_rpflags2);
340 error = md_get_uint32(mdp, &tdw);
341 error = md_get_uint32(mdp, &tdw);
342 error = md_get_uint32(mdp, &tdw);
344 error = md_get_uint16le(mdp, &rqp->sr_rptid);
345 error = md_get_uint16le(mdp, &rqp->sr_rppid);
346 error = md_get_uint16le(mdp, &rqp->sr_rpuid);
347 error = md_get_uint16le(mdp, &rqp->sr_rpmid);
349 SMBSDEBUG("M:%04x, P:%04x, U:%04x, T:%04x, E: %d:%d\n",
350 rqp->sr_rpmid, rqp->sr_rppid, rqp->sr_rpuid, rqp->sr_rptid,
351 rqp->sr_errclass, rqp->sr_serror);
352 return error ? error : rperror;
356 #define ALIGN4(a) (((a) + 3) & ~3)
359 * TRANS2 request implementation
362 smb_t2_alloc(struct smb_connobj *layer, u_short setup, struct smb_cred *scred,
363 struct smb_t2rq **t2pp)
365 struct smb_t2rq *t2p;
368 MALLOC(t2p, struct smb_t2rq *, sizeof(*t2p), M_SMBRQ, M_WAITOK);
371 error = smb_t2_init(t2p, layer, setup, scred);
372 t2p->t2_flags |= SMBT2_ALLOCED;
382 smb_t2_init(struct smb_t2rq *t2p, struct smb_connobj *source, u_short setup,
383 struct smb_cred *scred)
387 bzero(t2p, sizeof(*t2p));
388 t2p->t2_source = source;
389 t2p->t2_setupcount = 1;
390 t2p->t2_setupdata = t2p->t2_setup;
391 t2p->t2_setup[0] = setup;
392 t2p->t2_fid = 0xffff;
393 t2p->t2_cred = scred;
394 error = smb_rq_getenv(source, &t2p->t2_vc, NULL);
401 smb_t2_done(struct smb_t2rq *t2p)
403 mb_done(&t2p->t2_tparam);
404 mb_done(&t2p->t2_tdata);
405 md_done(&t2p->t2_rparam);
406 md_done(&t2p->t2_rdata);
407 if (t2p->t2_flags & SMBT2_ALLOCED)
412 smb_t2_placedata(struct mbuf *mtop, u_int16_t offset, u_int16_t count,
418 m0 = m_split(mtop, offset, M_WAIT);
421 for(len = 0, m = m0; m->m_next; m = m->m_next)
424 m->m_len -= len - count;
425 if (mdp->md_top == NULL) {
428 m_cat(mdp->md_top, m0);
433 smb_t2_reply(struct smb_t2rq *t2p)
436 struct smb_rq *rqp = t2p->t2_rq;
437 int error, totpgot, totdgot;
438 u_int16_t totpcount, totdcount, pcount, poff, doff, pdisp, ddisp;
439 u_int16_t tmp, bc, dcount;
442 error = smb_rq_reply(rqp);
445 if ((t2p->t2_flags & SMBT2_ALLSENT) == 0) {
447 * this is an interim response, ignore it.
450 md_next_record(&rqp->sr_rp);
455 * Now we have to get all subsequent responses. The CIFS specification
456 * says that they can be disordered which is weird.
459 totpgot = totdgot = 0;
460 totpcount = totdcount = 0xffff;
463 m_dumpm(mdp->md_top);
464 if ((error = md_get_uint8(mdp, &wc)) != 0)
470 if ((error = md_get_uint16le(mdp, &tmp)) != 0)
474 md_get_uint16le(mdp, &tmp);
477 if ((error = md_get_uint16le(mdp, &tmp)) != 0 || /* reserved */
478 (error = md_get_uint16le(mdp, &pcount)) != 0 ||
479 (error = md_get_uint16le(mdp, &poff)) != 0 ||
480 (error = md_get_uint16le(mdp, &pdisp)) != 0)
482 if (pcount != 0 && pdisp != totpgot) {
483 SMBERROR("Can't handle disordered parameters %d:%d\n",
488 if ((error = md_get_uint16le(mdp, &dcount)) != 0 ||
489 (error = md_get_uint16le(mdp, &doff)) != 0 ||
490 (error = md_get_uint16le(mdp, &ddisp)) != 0)
492 if (dcount != 0 && ddisp != totdgot) {
493 SMBERROR("Can't handle disordered data\n");
497 md_get_uint8(mdp, &wc);
498 md_get_uint8(mdp, NULL);
501 md_get_uint16(mdp, NULL);
502 if ((error = md_get_uint16le(mdp, &bc)) != 0)
504 /* tmp = SMB_HDRLEN + 1 + 10 * 2 + 2 * wc + 2;*/
506 error = smb_t2_placedata(mdp->md_top, doff, dcount,
512 error = smb_t2_placedata(mdp->md_top, poff, pcount,
519 if (totpgot >= totpcount && totdgot >= totdcount) {
521 t2p->t2_flags |= SMBT2_ALLRECV;
525 * We're done with this reply, look for the next one.
528 md_next_record(&rqp->sr_rp);
530 error = smb_rq_reply(rqp);
538 * Perform a full round of TRANS2 request
541 smb_t2_request_int(struct smb_t2rq *t2p)
543 struct smb_vc *vcp = t2p->t2_vc;
544 struct smb_cred *scred = t2p->t2_cred;
546 struct mdchain *mdp, mbparam, mbdata;
549 int totpcount, leftpcount, totdcount, leftdcount, len, txmax, i;
550 int error, doff, poff, txdcount, txpcount, nmlen;
552 m = t2p->t2_tparam.mb_top;
554 md_initm(&mbparam, m); /* do not free it! */
555 totpcount = m_fixhdr(m);
556 if (totpcount > 0xffff) /* maxvalue for u_short */
560 m = t2p->t2_tdata.mb_top;
562 md_initm(&mbdata, m); /* do not free it! */
563 totdcount = m_fixhdr(m);
564 if (totdcount > 0xffff)
568 leftdcount = totdcount;
569 leftpcount = totpcount;
570 txmax = vcp->vc_txmax;
571 error = smb_rq_alloc(t2p->t2_source, t2p->t_name ?
572 SMB_COM_TRANSACTION : SMB_COM_TRANSACTION2, scred, &rqp);
575 rqp->sr_flags |= SMBR_MULTIPACKET;
579 mb_put_uint16le(mbp, totpcount);
580 mb_put_uint16le(mbp, totdcount);
581 mb_put_uint16le(mbp, t2p->t2_maxpcount);
582 mb_put_uint16le(mbp, t2p->t2_maxdcount);
583 mb_put_uint8(mbp, t2p->t2_maxscount);
584 mb_put_uint8(mbp, 0); /* reserved */
585 mb_put_uint16le(mbp, 0); /* flags */
586 mb_put_uint32le(mbp, 0); /* Timeout */
587 mb_put_uint16le(mbp, 0); /* reserved 2 */
588 len = mb_fixhdr(mbp);
590 * now we have known packet size as
591 * ALIGN4(len + 5 * 2 + setupcount * 2 + 2 + strlen(name) + 1),
592 * and need to decide which parts should go into the first request
594 nmlen = t2p->t_name ? strlen(t2p->t_name) : 0;
595 len = ALIGN4(len + 5 * 2 + t2p->t2_setupcount * 2 + 2 + nmlen + 1);
596 if (len + leftpcount > txmax) {
597 txpcount = min(leftpcount, txmax - len);
602 txpcount = leftpcount;
603 poff = txpcount ? len : 0;
604 len = ALIGN4(len + txpcount);
605 txdcount = min(leftdcount, txmax - len);
606 doff = txdcount ? len : 0;
608 leftpcount -= txpcount;
609 leftdcount -= txdcount;
610 mb_put_uint16le(mbp, txpcount);
611 mb_put_uint16le(mbp, poff);
612 mb_put_uint16le(mbp, txdcount);
613 mb_put_uint16le(mbp, doff);
614 mb_put_uint8(mbp, t2p->t2_setupcount);
615 mb_put_uint8(mbp, 0);
616 for (i = 0; i < t2p->t2_setupcount; i++)
617 mb_put_uint16le(mbp, t2p->t2_setupdata[i]);
622 mb_put_mem(mbp, t2p->t_name, nmlen, MB_MSYSTEM);
623 mb_put_uint8(mbp, 0); /* terminating zero */
624 len = mb_fixhdr(mbp);
626 mb_put_mem(mbp, NULL, ALIGN4(len) - len, MB_MZERO);
627 error = md_get_mbuf(&mbparam, txpcount, &m);
628 SMBSDEBUG("%d:%d:%d\n", error, txpcount, txmax);
633 len = mb_fixhdr(mbp);
635 mb_put_mem(mbp, NULL, ALIGN4(len) - len, MB_MZERO);
636 error = md_get_mbuf(&mbdata, txdcount, &m);
641 smb_rq_bend(rqp); /* incredible, but thats it... */
642 error = smb_rq_enqueue(rqp);
645 if (leftpcount == 0 && leftdcount == 0)
646 t2p->t2_flags |= SMBT2_ALLSENT;
647 error = smb_t2_reply(t2p);
650 while (leftpcount || leftdcount) {
651 error = smb_rq_new(rqp, t2p->t_name ?
652 SMB_COM_TRANSACTION_SECONDARY : SMB_COM_TRANSACTION2_SECONDARY);
657 mb_put_uint16le(mbp, totpcount);
658 mb_put_uint16le(mbp, totdcount);
659 len = mb_fixhdr(mbp);
661 * now we have known packet size as
662 * ALIGN4(len + 7 * 2 + 2) for T2 request, and -2 for T one,
663 * and need to decide which parts should go into request
665 len = ALIGN4(len + 6 * 2 + 2);
666 if (t2p->t_name == NULL)
668 if (len + leftpcount > txmax) {
669 txpcount = min(leftpcount, txmax - len);
674 txpcount = leftpcount;
675 poff = txpcount ? len : 0;
676 len = ALIGN4(len + txpcount);
677 txdcount = min(leftdcount, txmax - len);
678 doff = txdcount ? len : 0;
680 mb_put_uint16le(mbp, txpcount);
681 mb_put_uint16le(mbp, poff);
682 mb_put_uint16le(mbp, totpcount - leftpcount);
683 mb_put_uint16le(mbp, txdcount);
684 mb_put_uint16le(mbp, doff);
685 mb_put_uint16le(mbp, totdcount - leftdcount);
686 leftpcount -= txpcount;
687 leftdcount -= txdcount;
688 if (t2p->t_name == NULL)
689 mb_put_uint16le(mbp, t2p->t2_fid);
692 mb_put_uint8(mbp, 0); /* name */
693 len = mb_fixhdr(mbp);
695 mb_put_mem(mbp, NULL, ALIGN4(len) - len, MB_MZERO);
696 error = md_get_mbuf(&mbparam, txpcount, &m);
701 len = mb_fixhdr(mbp);
703 mb_put_mem(mbp, NULL, ALIGN4(len) - len, MB_MZERO);
704 error = md_get_mbuf(&mbdata, txdcount, &m);
710 rqp->sr_state = SMBRQ_NOTSENT;
711 error = smb_iod_request(vcp->vc_iod, SMBIOD_EV_NEWRQ, NULL);
714 } /* while left params or data */
715 t2p->t2_flags |= SMBT2_ALLSENT;
716 mdp = &t2p->t2_rdata;
718 m_fixhdr(mdp->md_top);
719 md_initm(mdp, mdp->md_top);
721 mdp = &t2p->t2_rparam;
723 m_fixhdr(mdp->md_top);
724 md_initm(mdp, mdp->md_top);
727 smb_iod_removerq(rqp);
731 if (rqp->sr_flags & SMBR_RESTART)
732 t2p->t2_flags |= SMBT2_RESTART;
733 md_done(&t2p->t2_rparam);
734 md_done(&t2p->t2_rdata);
740 smb_t2_request(struct smb_t2rq *t2p)
742 int error = EINVAL, i;
744 for (i = 0; i < SMB_MAXRCN; i++) {
745 t2p->t2_flags &= ~SMBR_RESTART;
746 error = smb_t2_request_int(t2p);
749 if ((t2p->t2_flags & (SMBT2_RESTART | SMBT2_NORESTART)) != SMBT2_RESTART)