29
30#include <sys/param.h>
31#include <sys/systm.h>
32#include <sys/endian.h>
33#include <sys/kernel.h>
34#include <sys/malloc.h>
35#include <sys/module.h>
36#include <sys/proc.h>
37#include <sys/lock.h>
38#include <sys/sysctl.h>
39#include <sys/socket.h>
40#include <sys/socketvar.h>
41#include <sys/mbuf.h>
42
43#include <netsmb/smb.h>
44#include <netsmb/smb_conn.h>
45#include <netsmb/smb_rq.h>
46#include <netsmb/smb_subr.h>
47#include <netsmb/smb_tran.h>
48
49MALLOC_DEFINE(M_SMBRQ, "SMBRQ", "SMB request");
50
51MODULE_DEPEND(netsmb, libmchain, 1, 1, 1);
52
53static int smb_rq_reply(struct smb_rq *rqp);
54static int smb_rq_enqueue(struct smb_rq *rqp);
55static int smb_rq_getenv(struct smb_connobj *layer,
56 struct smb_vc **vcpp, struct smb_share **sspp);
57static int smb_rq_new(struct smb_rq *rqp, u_char cmd);
58static int smb_t2_reply(struct smb_t2rq *t2p);
59
60int
61smb_rq_alloc(struct smb_connobj *layer, u_char cmd, struct smb_cred *scred,
62 struct smb_rq **rqpp)
63{
64 struct smb_rq *rqp;
65 int error;
66
67 rqp = malloc(sizeof(*rqp), M_SMBRQ, M_WAITOK);
68 if (rqp == NULL)
69 return ENOMEM;
70 error = smb_rq_init(rqp, layer, cmd, scred);
71 rqp->sr_flags |= SMBR_ALLOCED;
72 if (error) {
73 smb_rq_done(rqp);
74 return error;
75 }
76 *rqpp = rqp;
77 return 0;
78}
79
80static char tzero[12];
81
82int
83smb_rq_init(struct smb_rq *rqp, struct smb_connobj *layer, u_char cmd,
84 struct smb_cred *scred)
85{
86 int error;
87
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);
91 if (error)
92 return error;
93 error = smb_vc_access(rqp->sr_vc, scred, SMBM_EXEC);
94 if (error)
95 return error;
96 if (rqp->sr_share) {
97 error = smb_share_access(rqp->sr_share, scred, SMBM_EXEC);
98 if (error)
99 return error;
100 }
101 rqp->sr_cred = scred;
102 rqp->sr_mid = smb_vc_nextmid(rqp->sr_vc);
103 return smb_rq_new(rqp, cmd);
104}
105
106static int
107smb_rq_new(struct smb_rq *rqp, u_char cmd)
108{
109 struct smb_vc *vcp = rqp->sr_vc;
110 struct mbchain *mbp = &rqp->sr_rq;
111 int error;
112 u_int16_t flags2;
113
114 rqp->sr_sendcnt = 0;
115 mb_done(mbp);
116 md_done(&rqp->sr_rp);
117 error = mb_init(mbp);
118 if (error)
119 return error;
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 flags2 = vcp->vc_hflags2;
125 if (cmd == SMB_COM_TRANSACTION || cmd == SMB_COM_TRANSACTION_SECONDARY)
126 flags2 &= ~SMB_FLAGS2_UNICODE;
127 if (cmd == SMB_COM_NEGOTIATE)
128 flags2 &= ~SMB_FLAGS2_SECURITY_SIGNATURE;
129 mb_put_uint16le(mbp, flags2);
130 if ((flags2 & SMB_FLAGS2_SECURITY_SIGNATURE) == 0) {
131 mb_put_mem(mbp, tzero, 12, MB_MSYSTEM);
132 rqp->sr_rqsig = NULL;
133 } else {
134 mb_put_uint16le(mbp, 0 /*scred->sc_p->p_pid >> 16*/);
135 rqp->sr_rqsig = (u_int8_t *)mb_reserve(mbp, 8);
136 mb_put_uint16le(mbp, 0);
137 }
138 rqp->sr_rqtid = mb_reserve(mbp, sizeof(u_int16_t));
139 mb_put_uint16le(mbp, 1 /*scred->sc_p->p_pid & 0xffff*/);
140 rqp->sr_rquid = mb_reserve(mbp, sizeof(u_int16_t));
141 mb_put_uint16le(mbp, rqp->sr_mid);
142 return 0;
143}
144
145void
146smb_rq_done(struct smb_rq *rqp)
147{
148 mb_done(&rqp->sr_rq);
149 md_done(&rqp->sr_rp);
150 smb_sl_destroy(&rqp->sr_slock);
151 if (rqp->sr_flags & SMBR_ALLOCED)
152 free(rqp, M_SMBRQ);
153}
154
155/*
156 * Simple request-reply exchange
157 */
158int
159smb_rq_simple(struct smb_rq *rqp)
160{
161 struct smb_vc *vcp = rqp->sr_vc;
162 int error = EINVAL, i;
163
164 for (i = 0; i < SMB_MAXRCN; i++) {
165 rqp->sr_flags &= ~SMBR_RESTART;
166 rqp->sr_timo = vcp->vc_timo;
167 rqp->sr_state = SMBRQ_NOTSENT;
168 error = smb_rq_enqueue(rqp);
169 if (error)
170 return error;
171 error = smb_rq_reply(rqp);
172 if (error == 0)
173 break;
174 if ((rqp->sr_flags & (SMBR_RESTART | SMBR_NORESTART)) != SMBR_RESTART)
175 break;
176 }
177 return error;
178}
179
180static int
181smb_rq_enqueue(struct smb_rq *rqp)
182{
183 struct smb_share *ssp = rqp->sr_share;
184 int error;
185
186 if (ssp == NULL || rqp->sr_cred == &rqp->sr_vc->vc_iod->iod_scred) {
187 return smb_iod_addrq(rqp);
188 }
189 for (;;) {
190 SMBS_ST_LOCK(ssp);
191 if (ssp->ss_flags & SMBS_RECONNECTING) {
192 msleep(&ssp->ss_vcgenid, SMBS_ST_LOCKPTR(ssp),
193 PWAIT | PDROP, "90trcn", hz);
194 if (smb_td_intr(rqp->sr_cred->scr_td))
195 return EINTR;
196 continue;
197 }
198 if (smb_share_valid(ssp) || (ssp->ss_flags & SMBS_CONNECTED) == 0) {
199 SMBS_ST_UNLOCK(ssp);
200 } else {
201 SMBS_ST_UNLOCK(ssp);
202 error = smb_iod_request(rqp->sr_vc->vc_iod,
203 SMBIOD_EV_TREECONNECT | SMBIOD_EV_SYNC, ssp);
204 if (error)
205 return error;
206 }
207 error = smb_iod_addrq(rqp);
208 if (error != EXDEV)
209 break;
210 }
211 return error;
212}
213
214void
215smb_rq_wstart(struct smb_rq *rqp)
216{
217 rqp->sr_wcount = mb_reserve(&rqp->sr_rq, sizeof(u_int8_t));
218 rqp->sr_rq.mb_count = 0;
219}
220
221void
222smb_rq_wend(struct smb_rq *rqp)
223{
224 if (rqp->sr_wcount == NULL) {
225 SMBERROR("no wcount\n"); /* actually panic */
226 return;
227 }
228 if (rqp->sr_rq.mb_count & 1)
229 SMBERROR("odd word count\n");
230 *rqp->sr_wcount = rqp->sr_rq.mb_count / 2;
231}
232
233void
234smb_rq_bstart(struct smb_rq *rqp)
235{
236 rqp->sr_bcount = mb_reserve(&rqp->sr_rq, sizeof(u_short));
237 rqp->sr_rq.mb_count = 0;
238}
239
240void
241smb_rq_bend(struct smb_rq *rqp)
242{
243 int bcnt;
244
245 if (rqp->sr_bcount == NULL) {
246 SMBERROR("no bcount\n"); /* actually panic */
247 return;
248 }
249 bcnt = rqp->sr_rq.mb_count;
250 if (bcnt > 0xffff)
251 SMBERROR("byte count too large (%d)\n", bcnt);
252 le16enc(rqp->sr_bcount, bcnt);
253}
254
255int
256smb_rq_intr(struct smb_rq *rqp)
257{
258 if (rqp->sr_flags & SMBR_INTR)
259 return EINTR;
260 return smb_td_intr(rqp->sr_cred->scr_td);
261}
262
263int
264smb_rq_getrequest(struct smb_rq *rqp, struct mbchain **mbpp)
265{
266 *mbpp = &rqp->sr_rq;
267 return 0;
268}
269
270int
271smb_rq_getreply(struct smb_rq *rqp, struct mdchain **mbpp)
272{
273 *mbpp = &rqp->sr_rp;
274 return 0;
275}
276
277static int
278smb_rq_getenv(struct smb_connobj *layer,
279 struct smb_vc **vcpp, struct smb_share **sspp)
280{
281 struct smb_vc *vcp = NULL;
282 struct smb_share *ssp = NULL;
283 struct smb_connobj *cp;
284 int error = 0;
285
286 switch (layer->co_level) {
287 case SMBL_VC:
288 vcp = CPTOVC(layer);
289 if (layer->co_parent == NULL) {
290 SMBERROR("zombie VC %s\n", vcp->vc_srvname);
291 error = EINVAL;
292 break;
293 }
294 break;
295 case SMBL_SHARE:
296 ssp = CPTOSS(layer);
297 cp = layer->co_parent;
298 if (cp == NULL) {
299 SMBERROR("zombie share %s\n", ssp->ss_name);
300 error = EINVAL;
301 break;
302 }
303 error = smb_rq_getenv(cp, &vcp, NULL);
304 if (error)
305 break;
306 break;
307 default:
308 SMBERROR("invalid layer %d passed\n", layer->co_level);
309 error = EINVAL;
310 }
311 if (vcpp)
312 *vcpp = vcp;
313 if (sspp)
314 *sspp = ssp;
315 return error;
316}
317
318/*
319 * Wait for reply on the request
320 */
321static int
322smb_rq_reply(struct smb_rq *rqp)
323{
324 struct mdchain *mdp = &rqp->sr_rp;
325 u_int32_t tdw;
326 u_int8_t tb;
327 int error, rperror = 0;
328
329 error = smb_iod_waitrq(rqp);
330 if (error)
331 return error;
332 error = md_get_uint32(mdp, &tdw);
333 if (error)
334 return error;
335 error = md_get_uint8(mdp, &tb);
336 if (rqp->sr_vc->vc_hflags2 & SMB_FLAGS2_ERR_STATUS) {
337 error = md_get_uint32le(mdp, &rqp->sr_error);
338 } else {
339 error = md_get_uint8(mdp, &rqp->sr_errclass);
340 error = md_get_uint8(mdp, &tb);
341 error = md_get_uint16le(mdp, &rqp->sr_serror);
342 if (!error)
343 rperror = smb_maperror(rqp->sr_errclass, rqp->sr_serror);
344 }
345 error = md_get_uint8(mdp, &rqp->sr_rpflags);
346 error = md_get_uint16le(mdp, &rqp->sr_rpflags2);
347
348 error = md_get_uint32(mdp, &tdw);
349 error = md_get_uint32(mdp, &tdw);
350 error = md_get_uint32(mdp, &tdw);
351
352 error = md_get_uint16le(mdp, &rqp->sr_rptid);
353 error = md_get_uint16le(mdp, &rqp->sr_rppid);
354 error = md_get_uint16le(mdp, &rqp->sr_rpuid);
355 error = md_get_uint16le(mdp, &rqp->sr_rpmid);
356
357 if (error == 0 &&
358 (rqp->sr_vc->vc_hflags2 & SMB_FLAGS2_SECURITY_SIGNATURE))
359 error = smb_rq_verify(rqp);
360
361 SMBSDEBUG("M:%04x, P:%04x, U:%04x, T:%04x, E: %d:%d\n",
362 rqp->sr_rpmid, rqp->sr_rppid, rqp->sr_rpuid, rqp->sr_rptid,
363 rqp->sr_errclass, rqp->sr_serror);
364 return error ? error : rperror;
365}
366
367
368#define ALIGN4(a) (((a) + 3) & ~3)
369
370/*
371 * TRANS2 request implementation
372 */
373int
374smb_t2_alloc(struct smb_connobj *layer, u_short setup, struct smb_cred *scred,
375 struct smb_t2rq **t2pp)
376{
377 struct smb_t2rq *t2p;
378 int error;
379
380 t2p = malloc(sizeof(*t2p), M_SMBRQ, M_WAITOK);
381 if (t2p == NULL)
382 return ENOMEM;
383 error = smb_t2_init(t2p, layer, setup, scred);
384 t2p->t2_flags |= SMBT2_ALLOCED;
385 if (error) {
386 smb_t2_done(t2p);
387 return error;
388 }
389 *t2pp = t2p;
390 return 0;
391}
392
393int
394smb_t2_init(struct smb_t2rq *t2p, struct smb_connobj *source, u_short setup,
395 struct smb_cred *scred)
396{
397 int error;
398
399 bzero(t2p, sizeof(*t2p));
400 t2p->t2_source = source;
401 t2p->t2_setupcount = 1;
402 t2p->t2_setupdata = t2p->t2_setup;
403 t2p->t2_setup[0] = setup;
404 t2p->t2_fid = 0xffff;
405 t2p->t2_cred = scred;
406 error = smb_rq_getenv(source, &t2p->t2_vc, NULL);
407 if (error)
408 return error;
409 return 0;
410}
411
412void
413smb_t2_done(struct smb_t2rq *t2p)
414{
415 mb_done(&t2p->t2_tparam);
416 mb_done(&t2p->t2_tdata);
417 md_done(&t2p->t2_rparam);
418 md_done(&t2p->t2_rdata);
419 if (t2p->t2_flags & SMBT2_ALLOCED)
420 free(t2p, M_SMBRQ);
421}
422
423static int
424smb_t2_placedata(struct mbuf *mtop, u_int16_t offset, u_int16_t count,
425 struct mdchain *mdp)
426{
427 struct mbuf *m, *m0;
428 int len;
429
430 m0 = m_split(mtop, offset, M_WAIT);
431 len = m_length(m0, &m);
432 m->m_len -= len - count;
433 if (mdp->md_top == NULL) {
434 md_initm(mdp, m0);
435 } else
436 m_cat(mdp->md_top, m0);
437 return 0;
438}
439
440static int
441smb_t2_reply(struct smb_t2rq *t2p)
442{
443 struct mdchain *mdp;
444 struct smb_rq *rqp = t2p->t2_rq;
445 int error, totpgot, totdgot;
446 u_int16_t totpcount, totdcount, pcount, poff, doff, pdisp, ddisp;
447 u_int16_t tmp, bc, dcount;
448 u_int8_t wc;
449
450 error = smb_rq_reply(rqp);
451 if (error)
452 return error;
453 if ((t2p->t2_flags & SMBT2_ALLSENT) == 0) {
454 /*
455 * this is an interim response, ignore it.
456 */
457 SMBRQ_SLOCK(rqp);
458 md_next_record(&rqp->sr_rp);
459 SMBRQ_SUNLOCK(rqp);
460 return 0;
461 }
462 /*
463 * Now we have to get all subsequent responses. The CIFS specification
464 * says that they can be disordered which is weird.
465 * TODO: timo
466 */
467 totpgot = totdgot = 0;
468 totpcount = totdcount = 0xffff;
469 mdp = &rqp->sr_rp;
470 for (;;) {
471 m_dumpm(mdp->md_top);
472 if ((error = md_get_uint8(mdp, &wc)) != 0)
473 break;
474 if (wc < 10) {
475 error = ENOENT;
476 break;
477 }
478 if ((error = md_get_uint16le(mdp, &tmp)) != 0)
479 break;
480 if (totpcount > tmp)
481 totpcount = tmp;
482 md_get_uint16le(mdp, &tmp);
483 if (totdcount > tmp)
484 totdcount = tmp;
485 if ((error = md_get_uint16le(mdp, &tmp)) != 0 || /* reserved */
486 (error = md_get_uint16le(mdp, &pcount)) != 0 ||
487 (error = md_get_uint16le(mdp, &poff)) != 0 ||
488 (error = md_get_uint16le(mdp, &pdisp)) != 0)
489 break;
490 if (pcount != 0 && pdisp != totpgot) {
491 SMBERROR("Can't handle disordered parameters %d:%d\n",
492 pdisp, totpgot);
493 error = EINVAL;
494 break;
495 }
496 if ((error = md_get_uint16le(mdp, &dcount)) != 0 ||
497 (error = md_get_uint16le(mdp, &doff)) != 0 ||
498 (error = md_get_uint16le(mdp, &ddisp)) != 0)
499 break;
500 if (dcount != 0 && ddisp != totdgot) {
501 SMBERROR("Can't handle disordered data\n");
502 error = EINVAL;
503 break;
504 }
505 md_get_uint8(mdp, &wc);
506 md_get_uint8(mdp, NULL);
507 tmp = wc;
508 while (tmp--)
509 md_get_uint16(mdp, NULL);
510 if ((error = md_get_uint16le(mdp, &bc)) != 0)
511 break;
512/* tmp = SMB_HDRLEN + 1 + 10 * 2 + 2 * wc + 2;*/
513 if (dcount) {
514 error = smb_t2_placedata(mdp->md_top, doff, dcount,
515 &t2p->t2_rdata);
516 if (error)
517 break;
518 }
519 if (pcount) {
520 error = smb_t2_placedata(mdp->md_top, poff, pcount,
521 &t2p->t2_rparam);
522 if (error)
523 break;
524 }
525 totpgot += pcount;
526 totdgot += dcount;
527 if (totpgot >= totpcount && totdgot >= totdcount) {
528 error = 0;
529 t2p->t2_flags |= SMBT2_ALLRECV;
530 break;
531 }
532 /*
533 * We're done with this reply, look for the next one.
534 */
535 SMBRQ_SLOCK(rqp);
536 md_next_record(&rqp->sr_rp);
537 SMBRQ_SUNLOCK(rqp);
538 error = smb_rq_reply(rqp);
539 if (error)
540 break;
541 }
542 return error;
543}
544
545/*
546 * Perform a full round of TRANS2 request
547 */
548static int
549smb_t2_request_int(struct smb_t2rq *t2p)
550{
551 struct smb_vc *vcp = t2p->t2_vc;
552 struct smb_cred *scred = t2p->t2_cred;
553 struct mbchain *mbp;
554 struct mdchain *mdp, mbparam, mbdata;
555 struct mbuf *m;
556 struct smb_rq *rqp;
557 int totpcount, leftpcount, totdcount, leftdcount, len, txmax, i;
558 int error, doff, poff, txdcount, txpcount, nmlen;
559
560 m = t2p->t2_tparam.mb_top;
561 if (m) {
562 md_initm(&mbparam, m); /* do not free it! */
563 totpcount = m_fixhdr(m);
564 if (totpcount > 0xffff) /* maxvalue for u_short */
565 return EINVAL;
566 } else
567 totpcount = 0;
568 m = t2p->t2_tdata.mb_top;
569 if (m) {
570 md_initm(&mbdata, m); /* do not free it! */
571 totdcount = m_fixhdr(m);
572 if (totdcount > 0xffff)
573 return EINVAL;
574 } else
575 totdcount = 0;
576 leftdcount = totdcount;
577 leftpcount = totpcount;
578 txmax = vcp->vc_txmax;
579 error = smb_rq_alloc(t2p->t2_source, t2p->t_name ?
580 SMB_COM_TRANSACTION : SMB_COM_TRANSACTION2, scred, &rqp);
581 if (error)
582 return error;
583 rqp->sr_flags |= SMBR_MULTIPACKET;
584 t2p->t2_rq = rqp;
585 rqp->sr_t2 = t2p;
586 mbp = &rqp->sr_rq;
587 smb_rq_wstart(rqp);
588 mb_put_uint16le(mbp, totpcount);
589 mb_put_uint16le(mbp, totdcount);
590 mb_put_uint16le(mbp, t2p->t2_maxpcount);
591 mb_put_uint16le(mbp, t2p->t2_maxdcount);
592 mb_put_uint8(mbp, t2p->t2_maxscount);
593 mb_put_uint8(mbp, 0); /* reserved */
594 mb_put_uint16le(mbp, 0); /* flags */
595 mb_put_uint32le(mbp, 0); /* Timeout */
596 mb_put_uint16le(mbp, 0); /* reserved 2 */
597 len = mb_fixhdr(mbp);
598 /*
599 * now we have known packet size as
600 * ALIGN4(len + 5 * 2 + setupcount * 2 + 2 + strlen(name) + 1),
601 * and need to decide which parts should go into the first request
602 */
603 nmlen = t2p->t_name ? strlen(t2p->t_name) : 0;
604 len = ALIGN4(len + 5 * 2 + t2p->t2_setupcount * 2 + 2 + nmlen + 1);
605 if (len + leftpcount > txmax) {
606 txpcount = min(leftpcount, txmax - len);
607 poff = len;
608 txdcount = 0;
609 doff = 0;
610 } else {
611 txpcount = leftpcount;
612 poff = txpcount ? len : 0;
613 len = ALIGN4(len + txpcount);
614 txdcount = min(leftdcount, txmax - len);
615 doff = txdcount ? len : 0;
616 }
617 leftpcount -= txpcount;
618 leftdcount -= txdcount;
619 mb_put_uint16le(mbp, txpcount);
620 mb_put_uint16le(mbp, poff);
621 mb_put_uint16le(mbp, txdcount);
622 mb_put_uint16le(mbp, doff);
623 mb_put_uint8(mbp, t2p->t2_setupcount);
624 mb_put_uint8(mbp, 0);
625 for (i = 0; i < t2p->t2_setupcount; i++)
626 mb_put_uint16le(mbp, t2p->t2_setupdata[i]);
627 smb_rq_wend(rqp);
628 smb_rq_bstart(rqp);
629 /* TDUNICODE */
630 if (t2p->t_name)
631 mb_put_mem(mbp, t2p->t_name, nmlen, MB_MSYSTEM);
632 mb_put_uint8(mbp, 0); /* terminating zero */
633 len = mb_fixhdr(mbp);
634 if (txpcount) {
635 mb_put_mem(mbp, NULL, ALIGN4(len) - len, MB_MZERO);
636 error = md_get_mbuf(&mbparam, txpcount, &m);
637 SMBSDEBUG("%d:%d:%d\n", error, txpcount, txmax);
638 if (error)
639 goto freerq;
640 mb_put_mbuf(mbp, m);
641 }
642 len = mb_fixhdr(mbp);
643 if (txdcount) {
644 mb_put_mem(mbp, NULL, ALIGN4(len) - len, MB_MZERO);
645 error = md_get_mbuf(&mbdata, txdcount, &m);
646 if (error)
647 goto freerq;
648 mb_put_mbuf(mbp, m);
649 }
650 smb_rq_bend(rqp); /* incredible, but thats it... */
651 error = smb_rq_enqueue(rqp);
652 if (error)
653 goto freerq;
654 if (leftpcount == 0 && leftdcount == 0)
655 t2p->t2_flags |= SMBT2_ALLSENT;
656 error = smb_t2_reply(t2p);
657 if (error)
658 goto bad;
659 while (leftpcount || leftdcount) {
660 t2p->t2_flags |= SMBT2_SECONDARY;
661 error = smb_rq_new(rqp, t2p->t_name ?
662 SMB_COM_TRANSACTION_SECONDARY : SMB_COM_TRANSACTION2_SECONDARY);
663 if (error)
664 goto bad;
665 mbp = &rqp->sr_rq;
666 smb_rq_wstart(rqp);
667 mb_put_uint16le(mbp, totpcount);
668 mb_put_uint16le(mbp, totdcount);
669 len = mb_fixhdr(mbp);
670 /*
671 * now we have known packet size as
672 * ALIGN4(len + 7 * 2 + 2) for T2 request, and -2 for T one,
673 * and need to decide which parts should go into request
674 */
675 len = ALIGN4(len + 6 * 2 + 2);
676 if (t2p->t_name == NULL)
677 len += 2;
678 if (len + leftpcount > txmax) {
679 txpcount = min(leftpcount, txmax - len);
680 poff = len;
681 txdcount = 0;
682 doff = 0;
683 } else {
684 txpcount = leftpcount;
685 poff = txpcount ? len : 0;
686 len = ALIGN4(len + txpcount);
687 txdcount = min(leftdcount, txmax - len);
688 doff = txdcount ? len : 0;
689 }
690 mb_put_uint16le(mbp, txpcount);
691 mb_put_uint16le(mbp, poff);
692 mb_put_uint16le(mbp, totpcount - leftpcount);
693 mb_put_uint16le(mbp, txdcount);
694 mb_put_uint16le(mbp, doff);
695 mb_put_uint16le(mbp, totdcount - leftdcount);
696 leftpcount -= txpcount;
697 leftdcount -= txdcount;
698 if (t2p->t_name == NULL)
699 mb_put_uint16le(mbp, t2p->t2_fid);
700 smb_rq_wend(rqp);
701 smb_rq_bstart(rqp);
702 mb_put_uint8(mbp, 0); /* name */
703 len = mb_fixhdr(mbp);
704 if (txpcount) {
705 mb_put_mem(mbp, NULL, ALIGN4(len) - len, MB_MZERO);
706 error = md_get_mbuf(&mbparam, txpcount, &m);
707 if (error)
708 goto bad;
709 mb_put_mbuf(mbp, m);
710 }
711 len = mb_fixhdr(mbp);
712 if (txdcount) {
713 mb_put_mem(mbp, NULL, ALIGN4(len) - len, MB_MZERO);
714 error = md_get_mbuf(&mbdata, txdcount, &m);
715 if (error)
716 goto bad;
717 mb_put_mbuf(mbp, m);
718 }
719 smb_rq_bend(rqp);
720 rqp->sr_state = SMBRQ_NOTSENT;
721 error = smb_iod_request(vcp->vc_iod, SMBIOD_EV_NEWRQ, NULL);
722 if (error)
723 goto bad;
724 } /* while left params or data */
725 t2p->t2_flags |= SMBT2_ALLSENT;
726 mdp = &t2p->t2_rdata;
727 if (mdp->md_top) {
728 m_fixhdr(mdp->md_top);
729 md_initm(mdp, mdp->md_top);
730 }
731 mdp = &t2p->t2_rparam;
732 if (mdp->md_top) {
733 m_fixhdr(mdp->md_top);
734 md_initm(mdp, mdp->md_top);
735 }
736bad:
737 smb_iod_removerq(rqp);
738freerq:
739 smb_rq_done(rqp);
740 if (error) {
741 if (rqp->sr_flags & SMBR_RESTART)
742 t2p->t2_flags |= SMBT2_RESTART;
743 md_done(&t2p->t2_rparam);
744 md_done(&t2p->t2_rdata);
745 }
746 return error;
747}
748
749int
750smb_t2_request(struct smb_t2rq *t2p)
751{
752 int error = EINVAL, i;
753
754 for (i = 0; i < SMB_MAXRCN; i++) {
755 t2p->t2_flags &= ~SMBR_RESTART;
756 error = smb_t2_request_int(t2p);
757 if (error == 0)
758 break;
759 if ((t2p->t2_flags & (SMBT2_RESTART | SMBT2_NORESTART)) != SMBT2_RESTART)
760 break;
761 }
762 return error;
763}
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