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 $
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/kernel.h>
37 #include <sys/malloc.h>
40 #include <sys/sysctl.h>
41 #include <sys/socket.h>
42 #include <sys/socketvar.h>
51 MALLOC_DEFINE(M_SMBRQ, "SMBRQ", "SMB request");
53 MODULE_DEPEND(netsmb, libmchain, 1, 1, 1);
55 static int smb_rq_reply(struct smb_rq *rqp);
56 static int smb_rq_enqueue(struct smb_rq *rqp);
57 static int smb_rq_getenv(struct smb_connobj *layer,
58 struct smb_vc **vcpp, struct smb_share **sspp);
59 static int smb_rq_new(struct smb_rq *rqp, u_char cmd);
60 static int smb_t2_reply(struct smb_t2rq *t2p);
63 smb_rq_alloc(struct smb_connobj *layer, u_char cmd, struct smb_cred *scred,
69 rqp = kmalloc(sizeof(*rqp), M_SMBRQ, M_WAITOK);
70 error = smb_rq_init(rqp, layer, cmd, scred);
71 rqp->sr_flags |= SMBR_ALLOCED;
80 static char tzero[12];
83 smb_rq_init(struct smb_rq *rqp, struct smb_connobj *layer, u_char cmd,
84 struct smb_cred *scred)
88 bzero(rqp, sizeof(*rqp));
89 smb_sl_init(&rqp->sr_slock, "srslock");
90 error = smb_rq_getenv(layer, &rqp->sr_vc, &rqp->sr_share);
93 error = smb_vc_access(rqp->sr_vc, scred, SMBM_EXEC);
97 error = smb_share_access(rqp->sr_share, scred, SMBM_EXEC);
101 rqp->sr_cred = scred;
102 rqp->sr_mid = smb_vc_nextmid(rqp->sr_vc);
103 return smb_rq_new(rqp, cmd);
107 smb_rq_new(struct smb_rq *rqp, u_char cmd)
109 struct smb_vc *vcp = rqp->sr_vc;
110 struct mbchain *mbp = &rqp->sr_rq;
115 md_done(&rqp->sr_rp);
116 error = mb_init(mbp);
119 mb_put_mem(mbp, SMB_SIGNATURE, SMB_SIGLEN, MB_MSYSTEM);
120 mb_put_uint8(mbp, cmd);
121 mb_put_uint32le(mbp, 0); /* DosError */
122 mb_put_uint8(mbp, vcp->vc_hflags);
123 mb_put_uint16le(mbp, vcp->vc_hflags2);
124 mb_put_mem(mbp, tzero, 12, MB_MSYSTEM);
125 rqp->sr_rqtid = (u_int16_t*)mb_reserve(mbp, sizeof(u_int16_t));
126 mb_put_uint16le(mbp, 1 /*scred->sc_p->p_pid & 0xffff*/);
127 rqp->sr_rquid = (u_int16_t*)mb_reserve(mbp, sizeof(u_int16_t));
128 mb_put_uint16le(mbp, rqp->sr_mid);
133 smb_rq_done(struct smb_rq *rqp)
135 mb_done(&rqp->sr_rq);
136 md_done(&rqp->sr_rp);
137 smb_sl_destroy(&rqp->sr_slock);
138 if (rqp->sr_flags & SMBR_ALLOCED)
143 * Simple request-reply exchange
146 smb_rq_simple(struct smb_rq *rqp)
148 struct smb_vc *vcp = rqp->sr_vc;
149 int error = EINVAL, i;
151 for (i = 0; i < SMB_MAXRCN; i++) {
152 rqp->sr_flags &= ~SMBR_RESTART;
153 rqp->sr_timo = vcp->vc_timo;
154 rqp->sr_state = SMBRQ_NOTSENT;
155 error = smb_rq_enqueue(rqp);
158 error = smb_rq_reply(rqp);
161 if ((rqp->sr_flags & (SMBR_RESTART | SMBR_NORESTART)) != SMBR_RESTART)
168 smb_rq_enqueue(struct smb_rq *rqp)
170 struct smb_share *ssp = rqp->sr_share;
173 if (ssp == NULL || rqp->sr_cred == &rqp->sr_vc->vc_iod->iod_scred) {
174 return smb_iod_addrq(rqp);
178 if (ssp->ss_flags & SMBS_RECONNECTING) {
179 smb_sleep(&ssp->ss_vcgenid, SMBS_ST_INTERLOCK(ssp),
180 PDROP, "90trcn", hz);
181 if (smb_proc_intr(rqp->sr_cred->scr_td))
185 if (smb_share_valid(ssp) || (ssp->ss_flags & SMBS_CONNECTED) == 0) {
189 error = smb_iod_request(rqp->sr_vc->vc_iod,
190 SMBIOD_EV_TREECONNECT | SMBIOD_EV_SYNC, ssp);
194 error = smb_iod_addrq(rqp);
202 smb_rq_wstart(struct smb_rq *rqp)
204 rqp->sr_wcount = mb_reserve(&rqp->sr_rq, sizeof(u_int8_t));
205 rqp->sr_rq.mb_count = 0;
209 smb_rq_wend(struct smb_rq *rqp)
211 if (rqp->sr_wcount == NULL) {
212 SMBERROR("no wcount\n"); /* actually panic */
215 if (rqp->sr_rq.mb_count & 1)
216 SMBERROR("odd word count\n");
217 *rqp->sr_wcount = rqp->sr_rq.mb_count / 2;
221 smb_rq_bstart(struct smb_rq *rqp)
223 rqp->sr_bcount = (u_short*)mb_reserve(&rqp->sr_rq, sizeof(u_short));
224 rqp->sr_rq.mb_count = 0;
228 smb_rq_bend(struct smb_rq *rqp)
232 if (rqp->sr_bcount == NULL) {
233 SMBERROR("no bcount\n"); /* actually panic */
236 bcnt = rqp->sr_rq.mb_count;
238 SMBERROR("byte count too large (%d)\n", bcnt);
239 *rqp->sr_bcount = bcnt;
243 smb_rq_intr(struct smb_rq *rqp)
245 struct thread *td = rqp->sr_cred->scr_td;
247 if (rqp->sr_flags & SMBR_INTR)
249 return smb_proc_intr(td);
253 smb_rq_getrequest(struct smb_rq *rqp, struct mbchain **mbpp)
260 smb_rq_getreply(struct smb_rq *rqp, struct mdchain **mbpp)
267 smb_rq_getenv(struct smb_connobj *layer,
268 struct smb_vc **vcpp, struct smb_share **sspp)
270 struct smb_vc *vcp = NULL;
271 struct smb_share *ssp = NULL;
272 struct smb_connobj *cp;
275 switch (layer->co_level) {
278 if (layer->co_parent == NULL) {
279 SMBERROR("zombie VC %s\n", vcp->vc_srvname);
286 cp = layer->co_parent;
288 SMBERROR("zombie share %s\n", ssp->ss_name);
292 error = smb_rq_getenv(cp, &vcp, NULL);
297 SMBERROR("invalid layer %d passed\n", layer->co_level);
308 * Wait for reply on the request
311 smb_rq_reply(struct smb_rq *rqp)
313 struct mdchain *mdp = &rqp->sr_rp;
316 int error, rperror = 0;
318 error = smb_iod_waitrq(rqp);
321 error = md_get_uint32(mdp, &tdw);
324 error = md_get_uint8(mdp, &tb);
325 if (rqp->sr_vc->vc_hflags2 & SMB_FLAGS2_ERR_STATUS) {
326 error = md_get_uint32le(mdp, &rqp->sr_error);
328 error = md_get_uint8(mdp, &rqp->sr_errclass);
329 error = md_get_uint8(mdp, &tb);
330 error = md_get_uint16le(mdp, &rqp->sr_serror);
332 rperror = smb_maperror(rqp->sr_errclass, rqp->sr_serror);
334 error = md_get_uint8(mdp, &rqp->sr_rpflags);
335 error = md_get_uint16le(mdp, &rqp->sr_rpflags2);
337 error = md_get_uint32(mdp, &tdw);
338 error = md_get_uint32(mdp, &tdw);
339 error = md_get_uint32(mdp, &tdw);
341 error = md_get_uint16le(mdp, &rqp->sr_rptid);
342 error = md_get_uint16le(mdp, &rqp->sr_rppid);
343 error = md_get_uint16le(mdp, &rqp->sr_rpuid);
344 error = md_get_uint16le(mdp, &rqp->sr_rpmid);
346 SMBSDEBUG("M:%04x, P:%04x, U:%04x, T:%04x, E: %d:%d\n",
347 rqp->sr_rpmid, rqp->sr_rppid, rqp->sr_rpuid, rqp->sr_rptid,
348 rqp->sr_errclass, rqp->sr_serror);
349 return error ? error : rperror;
353 #define ALIGN4(a) (((a) + 3) & ~3)
356 * TRANS2 request implementation
359 smb_t2_alloc(struct smb_connobj *layer, u_short setup, struct smb_cred *scred,
360 struct smb_t2rq **t2pp)
362 struct smb_t2rq *t2p;
365 t2p = kmalloc(sizeof(*t2p), M_SMBRQ, M_WAITOK);
366 error = smb_t2_init(t2p, layer, setup, scred);
367 t2p->t2_flags |= SMBT2_ALLOCED;
377 smb_t2_init(struct smb_t2rq *t2p, struct smb_connobj *source, u_short setup,
378 struct smb_cred *scred)
382 bzero(t2p, sizeof(*t2p));
383 t2p->t2_source = source;
384 t2p->t2_setupcount = 1;
385 t2p->t2_setupdata = t2p->t2_setup;
386 t2p->t2_setup[0] = setup;
387 t2p->t2_fid = 0xffff;
388 t2p->t2_cred = scred;
389 error = smb_rq_getenv(source, &t2p->t2_vc, NULL);
396 smb_t2_done(struct smb_t2rq *t2p)
398 mb_done(&t2p->t2_tparam);
399 mb_done(&t2p->t2_tdata);
400 md_done(&t2p->t2_rparam);
401 md_done(&t2p->t2_rdata);
402 if (t2p->t2_flags & SMBT2_ALLOCED)
407 smb_t2_placedata(struct mbuf *mtop, u_int16_t offset, u_int16_t count,
413 m0 = m_split(mtop, offset, MB_WAIT);
416 for(len = 0, m = m0; m->m_next; m = m->m_next)
419 m->m_len -= len - count;
420 if (mdp->md_top == NULL) {
423 m_cat(mdp->md_top, m0);
428 smb_t2_reply(struct smb_t2rq *t2p)
431 struct smb_rq *rqp = t2p->t2_rq;
432 int error, totpgot, totdgot;
433 u_int16_t totpcount, totdcount, pcount, poff, doff, pdisp, ddisp;
434 u_int16_t tmp, bc, dcount;
437 error = smb_rq_reply(rqp);
440 if ((t2p->t2_flags & SMBT2_ALLSENT) == 0) {
442 * this is an interim response, ignore it.
445 md_next_record(&rqp->sr_rp);
450 * Now we have to get all subsequent responses. The CIFS specification
451 * says that they can be disordered which is weird.
454 totpgot = totdgot = 0;
455 totpcount = totdcount = 0xffff;
458 m_dumpm(mdp->md_top);
459 if ((error = md_get_uint8(mdp, &wc)) != 0)
465 if ((error = md_get_uint16le(mdp, &tmp)) != 0)
469 md_get_uint16le(mdp, &tmp);
472 if ((error = md_get_uint16le(mdp, &tmp)) != 0 || /* reserved */
473 (error = md_get_uint16le(mdp, &pcount)) != 0 ||
474 (error = md_get_uint16le(mdp, &poff)) != 0 ||
475 (error = md_get_uint16le(mdp, &pdisp)) != 0)
477 if (pcount != 0 && pdisp != totpgot) {
478 SMBERROR("Can't handle disordered parameters %d:%d\n",
483 if ((error = md_get_uint16le(mdp, &dcount)) != 0 ||
484 (error = md_get_uint16le(mdp, &doff)) != 0 ||
485 (error = md_get_uint16le(mdp, &ddisp)) != 0)
487 if (dcount != 0 && ddisp != totdgot) {
488 SMBERROR("Can't handle disordered data\n");
492 md_get_uint8(mdp, &wc);
493 md_get_uint8(mdp, NULL);
496 md_get_uint16(mdp, NULL);
497 if ((error = md_get_uint16le(mdp, &bc)) != 0)
499 /* tmp = SMB_HDRLEN + 1 + 10 * 2 + 2 * wc + 2;*/
501 error = smb_t2_placedata(mdp->md_top, doff, dcount,
507 error = smb_t2_placedata(mdp->md_top, poff, pcount,
514 if (totpgot >= totpcount && totdgot >= totdcount) {
516 t2p->t2_flags |= SMBT2_ALLRECV;
520 * We're done with this reply, look for the next one.
523 md_next_record(&rqp->sr_rp);
525 error = smb_rq_reply(rqp);
533 * Perform a full round of TRANS2 request
536 smb_t2_request_int(struct smb_t2rq *t2p)
538 struct smb_vc *vcp = t2p->t2_vc;
539 struct smb_cred *scred = t2p->t2_cred;
541 struct mdchain *mdp, mbparam, mbdata;
544 int totpcount, leftpcount, totdcount, leftdcount, len, txmax, i;
545 int error, doff, poff, txdcount, txpcount, nmlen;
547 m = t2p->t2_tparam.mb_top;
549 md_initm(&mbparam, m); /* do not free it! */
550 totpcount = m_fixhdr(m);
551 if (totpcount > 0xffff) /* maxvalue for u_short */
555 m = t2p->t2_tdata.mb_top;
557 md_initm(&mbdata, m); /* do not free it! */
558 totdcount = m_fixhdr(m);
559 if (totdcount > 0xffff)
563 leftdcount = totdcount;
564 leftpcount = totpcount;
565 txmax = vcp->vc_txmax;
566 error = smb_rq_alloc(t2p->t2_source, t2p->t_name ?
567 SMB_COM_TRANSACTION : SMB_COM_TRANSACTION2, scred, &rqp);
570 rqp->sr_flags |= SMBR_MULTIPACKET;
574 mb_put_uint16le(mbp, totpcount);
575 mb_put_uint16le(mbp, totdcount);
576 mb_put_uint16le(mbp, t2p->t2_maxpcount);
577 mb_put_uint16le(mbp, t2p->t2_maxdcount);
578 mb_put_uint8(mbp, t2p->t2_maxscount);
579 mb_put_uint8(mbp, 0); /* reserved */
580 mb_put_uint16le(mbp, 0); /* flags */
581 mb_put_uint32le(mbp, 0); /* Timeout */
582 mb_put_uint16le(mbp, 0); /* reserved 2 */
583 len = mb_fixhdr(mbp);
585 * now we have known packet size as
586 * ALIGN4(len + 5 * 2 + setupcount * 2 + 2 + strlen(name) + 1),
587 * and need to decide which parts should go into the first request
589 nmlen = t2p->t_name ? strlen(t2p->t_name) : 0;
590 len = ALIGN4(len + 5 * 2 + t2p->t2_setupcount * 2 + 2 + nmlen + 1);
591 if (len + leftpcount > txmax) {
592 txpcount = min(leftpcount, txmax - len);
597 txpcount = leftpcount;
598 poff = txpcount ? len : 0;
599 len = ALIGN4(len + txpcount);
600 txdcount = min(leftdcount, txmax - len);
601 doff = txdcount ? len : 0;
603 leftpcount -= txpcount;
604 leftdcount -= txdcount;
605 mb_put_uint16le(mbp, txpcount);
606 mb_put_uint16le(mbp, poff);
607 mb_put_uint16le(mbp, txdcount);
608 mb_put_uint16le(mbp, doff);
609 mb_put_uint8(mbp, t2p->t2_setupcount);
610 mb_put_uint8(mbp, 0);
611 for (i = 0; i < t2p->t2_setupcount; i++)
612 mb_put_uint16le(mbp, t2p->t2_setupdata[i]);
617 mb_put_mem(mbp, t2p->t_name, nmlen, MB_MSYSTEM);
618 mb_put_uint8(mbp, 0); /* terminating zero */
619 len = mb_fixhdr(mbp);
621 mb_put_mem(mbp, NULL, ALIGN4(len) - len, MB_MZERO);
622 error = md_get_mbuf(&mbparam, txpcount, &m);
623 SMBSDEBUG("%d:%d:%d\n", error, txpcount, txmax);
628 len = mb_fixhdr(mbp);
630 mb_put_mem(mbp, NULL, ALIGN4(len) - len, MB_MZERO);
631 error = md_get_mbuf(&mbdata, txdcount, &m);
636 smb_rq_bend(rqp); /* incredible, but thats it... */
637 error = smb_rq_enqueue(rqp);
640 if (leftpcount == 0 && leftdcount == 0)
641 t2p->t2_flags |= SMBT2_ALLSENT;
642 error = smb_t2_reply(t2p);
645 while (leftpcount || leftdcount) {
646 error = smb_rq_new(rqp, t2p->t_name ?
647 SMB_COM_TRANSACTION_SECONDARY : SMB_COM_TRANSACTION2_SECONDARY);
652 mb_put_uint16le(mbp, totpcount);
653 mb_put_uint16le(mbp, totdcount);
654 len = mb_fixhdr(mbp);
656 * now we have known packet size as
657 * ALIGN4(len + 7 * 2 + 2) for T2 request, and -2 for T one,
658 * and need to decide which parts should go into request
660 len = ALIGN4(len + 6 * 2 + 2);
661 if (t2p->t_name == NULL)
663 if (len + leftpcount > txmax) {
664 txpcount = min(leftpcount, txmax - len);
669 txpcount = leftpcount;
670 poff = txpcount ? len : 0;
671 len = ALIGN4(len + txpcount);
672 txdcount = min(leftdcount, txmax - len);
673 doff = txdcount ? len : 0;
675 mb_put_uint16le(mbp, txpcount);
676 mb_put_uint16le(mbp, poff);
677 mb_put_uint16le(mbp, totpcount - leftpcount);
678 mb_put_uint16le(mbp, txdcount);
679 mb_put_uint16le(mbp, doff);
680 mb_put_uint16le(mbp, totdcount - leftdcount);
681 leftpcount -= txpcount;
682 leftdcount -= txdcount;
683 if (t2p->t_name == NULL)
684 mb_put_uint16le(mbp, t2p->t2_fid);
687 mb_put_uint8(mbp, 0); /* name */
688 len = mb_fixhdr(mbp);
690 mb_put_mem(mbp, NULL, ALIGN4(len) - len, MB_MZERO);
691 error = md_get_mbuf(&mbparam, txpcount, &m);
696 len = mb_fixhdr(mbp);
698 mb_put_mem(mbp, NULL, ALIGN4(len) - len, MB_MZERO);
699 error = md_get_mbuf(&mbdata, txdcount, &m);
705 rqp->sr_state = SMBRQ_NOTSENT;
706 error = smb_iod_request(vcp->vc_iod, SMBIOD_EV_NEWRQ, NULL);
709 } /* while left params or data */
710 t2p->t2_flags |= SMBT2_ALLSENT;
711 mdp = &t2p->t2_rdata;
713 m_fixhdr(mdp->md_top);
714 md_initm(mdp, mdp->md_top);
716 mdp = &t2p->t2_rparam;
718 m_fixhdr(mdp->md_top);
719 md_initm(mdp, mdp->md_top);
722 smb_iod_removerq(rqp);
726 if (rqp->sr_flags & SMBR_RESTART)
727 t2p->t2_flags |= SMBT2_RESTART;
728 md_done(&t2p->t2_rparam);
729 md_done(&t2p->t2_rdata);
735 smb_t2_request(struct smb_t2rq *t2p)
737 int error = EINVAL, i;
739 for (i = 0; i < SMB_MAXRCN; i++) {
740 t2p->t2_flags &= ~SMBR_RESTART;
741 error = smb_t2_request_int(t2p);
744 if ((t2p->t2_flags & (SMBT2_RESTART | SMBT2_NORESTART)) != SMBT2_RESTART)