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 1.11 2008/01/06 16:55:53 swildner 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>
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);
71 error = smb_rq_init(rqp, layer, cmd, scred);
72 rqp->sr_flags |= SMBR_ALLOCED;
81 static char tzero[12];
84 smb_rq_init(struct smb_rq *rqp, struct smb_connobj *layer, u_char cmd,
85 struct smb_cred *scred)
89 bzero(rqp, sizeof(*rqp));
90 smb_sl_init(&rqp->sr_slock, "srslock");
91 error = smb_rq_getenv(layer, &rqp->sr_vc, &rqp->sr_share);
94 error = smb_vc_access(rqp->sr_vc, scred, SMBM_EXEC);
98 error = smb_share_access(rqp->sr_share, scred, SMBM_EXEC);
102 rqp->sr_cred = scred;
103 rqp->sr_mid = smb_vc_nextmid(rqp->sr_vc);
104 return smb_rq_new(rqp, cmd);
108 smb_rq_new(struct smb_rq *rqp, u_char cmd)
110 struct smb_vc *vcp = rqp->sr_vc;
111 struct mbchain *mbp = &rqp->sr_rq;
116 md_done(&rqp->sr_rp);
117 error = mb_init(mbp);
120 mb_put_mem(mbp, SMB_SIGNATURE, SMB_SIGLEN, MB_MSYSTEM);
121 mb_put_uint8(mbp, cmd);
122 mb_put_uint32le(mbp, 0); /* DosError */
123 mb_put_uint8(mbp, vcp->vc_hflags);
124 mb_put_uint16le(mbp, vcp->vc_hflags2);
125 mb_put_mem(mbp, tzero, 12, MB_MSYSTEM);
126 rqp->sr_rqtid = (u_int16_t*)mb_reserve(mbp, sizeof(u_int16_t));
127 mb_put_uint16le(mbp, 1 /*scred->sc_p->p_pid & 0xffff*/);
128 rqp->sr_rquid = (u_int16_t*)mb_reserve(mbp, sizeof(u_int16_t));
129 mb_put_uint16le(mbp, rqp->sr_mid);
134 smb_rq_done(struct smb_rq *rqp)
136 mb_done(&rqp->sr_rq);
137 md_done(&rqp->sr_rp);
138 smb_sl_destroy(&rqp->sr_slock);
139 if (rqp->sr_flags & SMBR_ALLOCED)
144 * Simple request-reply exchange
147 smb_rq_simple(struct smb_rq *rqp)
149 struct smb_vc *vcp = rqp->sr_vc;
150 int error = EINVAL, i;
152 for (i = 0; i < SMB_MAXRCN; i++) {
153 rqp->sr_flags &= ~SMBR_RESTART;
154 rqp->sr_timo = vcp->vc_timo;
155 rqp->sr_state = SMBRQ_NOTSENT;
156 error = smb_rq_enqueue(rqp);
159 error = smb_rq_reply(rqp);
162 if ((rqp->sr_flags & (SMBR_RESTART | SMBR_NORESTART)) != SMBR_RESTART)
169 smb_rq_enqueue(struct smb_rq *rqp)
171 struct smb_share *ssp = rqp->sr_share;
174 if (ssp == NULL || rqp->sr_cred == &rqp->sr_vc->vc_iod->iod_scred) {
175 return smb_iod_addrq(rqp);
179 if (ssp->ss_flags & SMBS_RECONNECTING) {
180 smb_sleep(&ssp->ss_vcgenid, SMBS_ST_INTERLOCK(ssp),
181 PDROP, "90trcn", hz);
182 if (smb_proc_intr(rqp->sr_cred->scr_td))
186 if (smb_share_valid(ssp) || (ssp->ss_flags & SMBS_CONNECTED) == 0) {
190 error = smb_iod_request(rqp->sr_vc->vc_iod,
191 SMBIOD_EV_TREECONNECT | SMBIOD_EV_SYNC, ssp);
195 error = smb_iod_addrq(rqp);
203 smb_rq_wstart(struct smb_rq *rqp)
205 rqp->sr_wcount = mb_reserve(&rqp->sr_rq, sizeof(u_int8_t));
206 rqp->sr_rq.mb_count = 0;
210 smb_rq_wend(struct smb_rq *rqp)
212 if (rqp->sr_wcount == NULL) {
213 SMBERROR("no wcount\n"); /* actually panic */
216 if (rqp->sr_rq.mb_count & 1)
217 SMBERROR("odd word count\n");
218 *rqp->sr_wcount = rqp->sr_rq.mb_count / 2;
222 smb_rq_bstart(struct smb_rq *rqp)
224 rqp->sr_bcount = (u_short*)mb_reserve(&rqp->sr_rq, sizeof(u_short));
225 rqp->sr_rq.mb_count = 0;
229 smb_rq_bend(struct smb_rq *rqp)
233 if (rqp->sr_bcount == NULL) {
234 SMBERROR("no bcount\n"); /* actually panic */
237 bcnt = rqp->sr_rq.mb_count;
239 SMBERROR("byte count too large (%d)\n", bcnt);
240 *rqp->sr_bcount = bcnt;
244 smb_rq_intr(struct smb_rq *rqp)
246 struct thread *td = rqp->sr_cred->scr_td;
248 if (rqp->sr_flags & SMBR_INTR)
250 return smb_proc_intr(td);
254 smb_rq_getrequest(struct smb_rq *rqp, struct mbchain **mbpp)
261 smb_rq_getreply(struct smb_rq *rqp, struct mdchain **mbpp)
268 smb_rq_getenv(struct smb_connobj *layer,
269 struct smb_vc **vcpp, struct smb_share **sspp)
271 struct smb_vc *vcp = NULL;
272 struct smb_share *ssp = NULL;
273 struct smb_connobj *cp;
276 switch (layer->co_level) {
279 if (layer->co_parent == NULL) {
280 SMBERROR("zombie VC %s\n", vcp->vc_srvname);
287 cp = layer->co_parent;
289 SMBERROR("zombie share %s\n", ssp->ss_name);
293 error = smb_rq_getenv(cp, &vcp, NULL);
298 SMBERROR("invalid layer %d passed\n", layer->co_level);
309 * Wait for reply on the request
312 smb_rq_reply(struct smb_rq *rqp)
314 struct mdchain *mdp = &rqp->sr_rp;
317 int error, rperror = 0;
319 error = smb_iod_waitrq(rqp);
322 error = md_get_uint32(mdp, &tdw);
325 error = md_get_uint8(mdp, &tb);
326 if (rqp->sr_vc->vc_hflags2 & SMB_FLAGS2_ERR_STATUS) {
327 error = md_get_uint32le(mdp, &rqp->sr_error);
329 error = md_get_uint8(mdp, &rqp->sr_errclass);
330 error = md_get_uint8(mdp, &tb);
331 error = md_get_uint16le(mdp, &rqp->sr_serror);
333 rperror = smb_maperror(rqp->sr_errclass, rqp->sr_serror);
335 error = md_get_uint8(mdp, &rqp->sr_rpflags);
336 error = md_get_uint16le(mdp, &rqp->sr_rpflags2);
338 error = md_get_uint32(mdp, &tdw);
339 error = md_get_uint32(mdp, &tdw);
340 error = md_get_uint32(mdp, &tdw);
342 error = md_get_uint16le(mdp, &rqp->sr_rptid);
343 error = md_get_uint16le(mdp, &rqp->sr_rppid);
344 error = md_get_uint16le(mdp, &rqp->sr_rpuid);
345 error = md_get_uint16le(mdp, &rqp->sr_rpmid);
347 SMBSDEBUG("M:%04x, P:%04x, U:%04x, T:%04x, E: %d:%d\n",
348 rqp->sr_rpmid, rqp->sr_rppid, rqp->sr_rpuid, rqp->sr_rptid,
349 rqp->sr_errclass, rqp->sr_serror);
350 return error ? error : rperror;
354 #define ALIGN4(a) (((a) + 3) & ~3)
357 * TRANS2 request implementation
360 smb_t2_alloc(struct smb_connobj *layer, u_short setup, struct smb_cred *scred,
361 struct smb_t2rq **t2pp)
363 struct smb_t2rq *t2p;
366 MALLOC(t2p, struct smb_t2rq *, sizeof(*t2p), M_SMBRQ, M_WAITOK);
367 error = smb_t2_init(t2p, layer, setup, scred);
368 t2p->t2_flags |= SMBT2_ALLOCED;
378 smb_t2_init(struct smb_t2rq *t2p, struct smb_connobj *source, u_short setup,
379 struct smb_cred *scred)
383 bzero(t2p, sizeof(*t2p));
384 t2p->t2_source = source;
385 t2p->t2_setupcount = 1;
386 t2p->t2_setupdata = t2p->t2_setup;
387 t2p->t2_setup[0] = setup;
388 t2p->t2_fid = 0xffff;
389 t2p->t2_cred = scred;
390 error = smb_rq_getenv(source, &t2p->t2_vc, NULL);
397 smb_t2_done(struct smb_t2rq *t2p)
399 mb_done(&t2p->t2_tparam);
400 mb_done(&t2p->t2_tdata);
401 md_done(&t2p->t2_rparam);
402 md_done(&t2p->t2_rdata);
403 if (t2p->t2_flags & SMBT2_ALLOCED)
408 smb_t2_placedata(struct mbuf *mtop, u_int16_t offset, u_int16_t count,
414 m0 = m_split(mtop, offset, MB_WAIT);
417 for(len = 0, m = m0; m->m_next; m = m->m_next)
420 m->m_len -= len - count;
421 if (mdp->md_top == NULL) {
424 m_cat(mdp->md_top, m0);
429 smb_t2_reply(struct smb_t2rq *t2p)
432 struct smb_rq *rqp = t2p->t2_rq;
433 int error, totpgot, totdgot;
434 u_int16_t totpcount, totdcount, pcount, poff, doff, pdisp, ddisp;
435 u_int16_t tmp, bc, dcount;
438 error = smb_rq_reply(rqp);
441 if ((t2p->t2_flags & SMBT2_ALLSENT) == 0) {
443 * this is an interim response, ignore it.
446 md_next_record(&rqp->sr_rp);
451 * Now we have to get all subsequent responses. The CIFS specification
452 * says that they can be disordered which is weird.
455 totpgot = totdgot = 0;
456 totpcount = totdcount = 0xffff;
459 m_dumpm(mdp->md_top);
460 if ((error = md_get_uint8(mdp, &wc)) != 0)
466 if ((error = md_get_uint16le(mdp, &tmp)) != 0)
470 md_get_uint16le(mdp, &tmp);
473 if ((error = md_get_uint16le(mdp, &tmp)) != 0 || /* reserved */
474 (error = md_get_uint16le(mdp, &pcount)) != 0 ||
475 (error = md_get_uint16le(mdp, &poff)) != 0 ||
476 (error = md_get_uint16le(mdp, &pdisp)) != 0)
478 if (pcount != 0 && pdisp != totpgot) {
479 SMBERROR("Can't handle disordered parameters %d:%d\n",
484 if ((error = md_get_uint16le(mdp, &dcount)) != 0 ||
485 (error = md_get_uint16le(mdp, &doff)) != 0 ||
486 (error = md_get_uint16le(mdp, &ddisp)) != 0)
488 if (dcount != 0 && ddisp != totdgot) {
489 SMBERROR("Can't handle disordered data\n");
493 md_get_uint8(mdp, &wc);
494 md_get_uint8(mdp, NULL);
497 md_get_uint16(mdp, NULL);
498 if ((error = md_get_uint16le(mdp, &bc)) != 0)
500 /* tmp = SMB_HDRLEN + 1 + 10 * 2 + 2 * wc + 2;*/
502 error = smb_t2_placedata(mdp->md_top, doff, dcount,
508 error = smb_t2_placedata(mdp->md_top, poff, pcount,
515 if (totpgot >= totpcount && totdgot >= totdcount) {
517 t2p->t2_flags |= SMBT2_ALLRECV;
521 * We're done with this reply, look for the next one.
524 md_next_record(&rqp->sr_rp);
526 error = smb_rq_reply(rqp);
534 * Perform a full round of TRANS2 request
537 smb_t2_request_int(struct smb_t2rq *t2p)
539 struct smb_vc *vcp = t2p->t2_vc;
540 struct smb_cred *scred = t2p->t2_cred;
542 struct mdchain *mdp, mbparam, mbdata;
545 int totpcount, leftpcount, totdcount, leftdcount, len, txmax, i;
546 int error, doff, poff, txdcount, txpcount, nmlen;
548 m = t2p->t2_tparam.mb_top;
550 md_initm(&mbparam, m); /* do not free it! */
551 totpcount = m_fixhdr(m);
552 if (totpcount > 0xffff) /* maxvalue for u_short */
556 m = t2p->t2_tdata.mb_top;
558 md_initm(&mbdata, m); /* do not free it! */
559 totdcount = m_fixhdr(m);
560 if (totdcount > 0xffff)
564 leftdcount = totdcount;
565 leftpcount = totpcount;
566 txmax = vcp->vc_txmax;
567 error = smb_rq_alloc(t2p->t2_source, t2p->t_name ?
568 SMB_COM_TRANSACTION : SMB_COM_TRANSACTION2, scred, &rqp);
571 rqp->sr_flags |= SMBR_MULTIPACKET;
575 mb_put_uint16le(mbp, totpcount);
576 mb_put_uint16le(mbp, totdcount);
577 mb_put_uint16le(mbp, t2p->t2_maxpcount);
578 mb_put_uint16le(mbp, t2p->t2_maxdcount);
579 mb_put_uint8(mbp, t2p->t2_maxscount);
580 mb_put_uint8(mbp, 0); /* reserved */
581 mb_put_uint16le(mbp, 0); /* flags */
582 mb_put_uint32le(mbp, 0); /* Timeout */
583 mb_put_uint16le(mbp, 0); /* reserved 2 */
584 len = mb_fixhdr(mbp);
586 * now we have known packet size as
587 * ALIGN4(len + 5 * 2 + setupcount * 2 + 2 + strlen(name) + 1),
588 * and need to decide which parts should go into the first request
590 nmlen = t2p->t_name ? strlen(t2p->t_name) : 0;
591 len = ALIGN4(len + 5 * 2 + t2p->t2_setupcount * 2 + 2 + nmlen + 1);
592 if (len + leftpcount > txmax) {
593 txpcount = min(leftpcount, txmax - len);
598 txpcount = leftpcount;
599 poff = txpcount ? len : 0;
600 len = ALIGN4(len + txpcount);
601 txdcount = min(leftdcount, txmax - len);
602 doff = txdcount ? len : 0;
604 leftpcount -= txpcount;
605 leftdcount -= txdcount;
606 mb_put_uint16le(mbp, txpcount);
607 mb_put_uint16le(mbp, poff);
608 mb_put_uint16le(mbp, txdcount);
609 mb_put_uint16le(mbp, doff);
610 mb_put_uint8(mbp, t2p->t2_setupcount);
611 mb_put_uint8(mbp, 0);
612 for (i = 0; i < t2p->t2_setupcount; i++)
613 mb_put_uint16le(mbp, t2p->t2_setupdata[i]);
618 mb_put_mem(mbp, t2p->t_name, nmlen, MB_MSYSTEM);
619 mb_put_uint8(mbp, 0); /* terminating zero */
620 len = mb_fixhdr(mbp);
622 mb_put_mem(mbp, NULL, ALIGN4(len) - len, MB_MZERO);
623 error = md_get_mbuf(&mbparam, txpcount, &m);
624 SMBSDEBUG("%d:%d:%d\n", error, txpcount, txmax);
629 len = mb_fixhdr(mbp);
631 mb_put_mem(mbp, NULL, ALIGN4(len) - len, MB_MZERO);
632 error = md_get_mbuf(&mbdata, txdcount, &m);
637 smb_rq_bend(rqp); /* incredible, but thats it... */
638 error = smb_rq_enqueue(rqp);
641 if (leftpcount == 0 && leftdcount == 0)
642 t2p->t2_flags |= SMBT2_ALLSENT;
643 error = smb_t2_reply(t2p);
646 while (leftpcount || leftdcount) {
647 error = smb_rq_new(rqp, t2p->t_name ?
648 SMB_COM_TRANSACTION_SECONDARY : SMB_COM_TRANSACTION2_SECONDARY);
653 mb_put_uint16le(mbp, totpcount);
654 mb_put_uint16le(mbp, totdcount);
655 len = mb_fixhdr(mbp);
657 * now we have known packet size as
658 * ALIGN4(len + 7 * 2 + 2) for T2 request, and -2 for T one,
659 * and need to decide which parts should go into request
661 len = ALIGN4(len + 6 * 2 + 2);
662 if (t2p->t_name == NULL)
664 if (len + leftpcount > txmax) {
665 txpcount = min(leftpcount, txmax - len);
670 txpcount = leftpcount;
671 poff = txpcount ? len : 0;
672 len = ALIGN4(len + txpcount);
673 txdcount = min(leftdcount, txmax - len);
674 doff = txdcount ? len : 0;
676 mb_put_uint16le(mbp, txpcount);
677 mb_put_uint16le(mbp, poff);
678 mb_put_uint16le(mbp, totpcount - leftpcount);
679 mb_put_uint16le(mbp, txdcount);
680 mb_put_uint16le(mbp, doff);
681 mb_put_uint16le(mbp, totdcount - leftdcount);
682 leftpcount -= txpcount;
683 leftdcount -= txdcount;
684 if (t2p->t_name == NULL)
685 mb_put_uint16le(mbp, t2p->t2_fid);
688 mb_put_uint8(mbp, 0); /* name */
689 len = mb_fixhdr(mbp);
691 mb_put_mem(mbp, NULL, ALIGN4(len) - len, MB_MZERO);
692 error = md_get_mbuf(&mbparam, txpcount, &m);
697 len = mb_fixhdr(mbp);
699 mb_put_mem(mbp, NULL, ALIGN4(len) - len, MB_MZERO);
700 error = md_get_mbuf(&mbdata, txdcount, &m);
706 rqp->sr_state = SMBRQ_NOTSENT;
707 error = smb_iod_request(vcp->vc_iod, SMBIOD_EV_NEWRQ, NULL);
710 } /* while left params or data */
711 t2p->t2_flags |= SMBT2_ALLSENT;
712 mdp = &t2p->t2_rdata;
714 m_fixhdr(mdp->md_top);
715 md_initm(mdp, mdp->md_top);
717 mdp = &t2p->t2_rparam;
719 m_fixhdr(mdp->md_top);
720 md_initm(mdp, mdp->md_top);
723 smb_iod_removerq(rqp);
727 if (rqp->sr_flags & SMBR_RESTART)
728 t2p->t2_flags |= SMBT2_RESTART;
729 md_done(&t2p->t2_rparam);
730 md_done(&t2p->t2_rdata);
736 smb_t2_request(struct smb_t2rq *t2p)
738 int error = EINVAL, i;
740 for (i = 0; i < SMB_MAXRCN; i++) {
741 t2p->t2_flags &= ~SMBR_RESTART;
742 error = smb_t2_request_int(t2p);
745 if ((t2p->t2_flags & (SMBT2_RESTART | SMBT2_NORESTART)) != SMBT2_RESTART)