Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/netsmb/smb_rq.c
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1 /* 2 * Copyright (c) 2000-2001, Boris Popov 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 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. 19 * 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 30 * SUCH DAMAGE. 31 * 32 * $FreeBSD: releng/5.1/sys/netsmb/smb_rq.c 112888 2003-03-31 22:49:17Z jeff $ 33 */ 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/endian.h> 37 #include <sys/kernel.h> 38 #include <sys/malloc.h> 39 #include <sys/proc.h> 40 #include <sys/lock.h> 41 #include <sys/sysctl.h> 42 #include <sys/socket.h> 43 #include <sys/socketvar.h> 44 #include <sys/mbuf.h> 45 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> 51 52 MALLOC_DEFINE(M_SMBRQ, "SMBRQ", "SMB request"); 53 54 MODULE_DEPEND(netsmb, libmchain, 1, 1, 1); 55 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); 62 63 int 64 smb_rq_alloc(struct smb_connobj *layer, u_char cmd, struct smb_cred *scred, 65 struct smb_rq **rqpp) 66 { 67 struct smb_rq *rqp; 68 int error; 69 70 MALLOC(rqp, struct smb_rq *, sizeof(*rqp), M_SMBRQ, M_WAITOK); 71 if (rqp == NULL) 72 return ENOMEM; 73 error = smb_rq_init(rqp, layer, cmd, scred); 74 rqp->sr_flags |= SMBR_ALLOCED; 75 if (error) { 76 smb_rq_done(rqp); 77 return error; 78 } 79 *rqpp = rqp; 80 return 0; 81 } 82 83 static char tzero[12]; 84 85 int 86 smb_rq_init(struct smb_rq *rqp, struct smb_connobj *layer, u_char cmd, 87 struct smb_cred *scred) 88 { 89 int error; 90 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); 94 if (error) 95 return error; 96 error = smb_vc_access(rqp->sr_vc, scred, SMBM_EXEC); 97 if (error) 98 return error; 99 if (rqp->sr_share) { 100 error = smb_share_access(rqp->sr_share, scred, SMBM_EXEC); 101 if (error) 102 return error; 103 } 104 rqp->sr_cred = scred; 105 rqp->sr_mid = smb_vc_nextmid(rqp->sr_vc); 106 return smb_rq_new(rqp, cmd); 107 } 108 109 static int 110 smb_rq_new(struct smb_rq *rqp, u_char cmd) 111 { 112 struct smb_vc *vcp = rqp->sr_vc; 113 struct mbchain *mbp = &rqp->sr_rq; 114 int error; 115 116 rqp->sr_sendcnt = 0; 117 mb_done(mbp); 118 md_done(&rqp->sr_rp); 119 error = mb_init(mbp); 120 if (error) 121 return error; 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 if (cmd == SMB_COM_TRANSACTION || cmd == SMB_COM_TRANSACTION_SECONDARY) 127 mb_put_uint16le(mbp, (vcp->vc_hflags2 & ~SMB_FLAGS2_UNICODE)); 128 else 129 mb_put_uint16le(mbp, vcp->vc_hflags2); 130 mb_put_mem(mbp, tzero, 12, MB_MSYSTEM); 131 rqp->sr_rqtid = (u_int16_t*)mb_reserve(mbp, sizeof(u_int16_t)); 132 mb_put_uint16le(mbp, 1 /*scred->sc_p->p_pid & 0xffff*/); 133 rqp->sr_rquid = (u_int16_t*)mb_reserve(mbp, sizeof(u_int16_t)); 134 mb_put_uint16le(mbp, rqp->sr_mid); 135 return 0; 136 } 137 138 void 139 smb_rq_done(struct smb_rq *rqp) 140 { 141 mb_done(&rqp->sr_rq); 142 md_done(&rqp->sr_rp); 143 smb_sl_destroy(&rqp->sr_slock); 144 if (rqp->sr_flags & SMBR_ALLOCED) 145 free(rqp, M_SMBRQ); 146 } 147 148 /* 149 * Simple request-reply exchange 150 */ 151 int 152 smb_rq_simple(struct smb_rq *rqp) 153 { 154 struct smb_vc *vcp = rqp->sr_vc; 155 int error = EINVAL, i; 156 157 for (i = 0; i < SMB_MAXRCN; i++) { 158 rqp->sr_flags &= ~SMBR_RESTART; 159 rqp->sr_timo = vcp->vc_timo; 160 rqp->sr_state = SMBRQ_NOTSENT; 161 error = smb_rq_enqueue(rqp); 162 if (error) 163 return error; 164 error = smb_rq_reply(rqp); 165 if (error == 0) 166 break; 167 if ((rqp->sr_flags & (SMBR_RESTART | SMBR_NORESTART)) != SMBR_RESTART) 168 break; 169 } 170 return error; 171 } 172 173 static int 174 smb_rq_enqueue(struct smb_rq *rqp) 175 { 176 struct smb_share *ssp = rqp->sr_share; 177 int error; 178 179 if (ssp == NULL || rqp->sr_cred == &rqp->sr_vc->vc_iod->iod_scred) { 180 return smb_iod_addrq(rqp); 181 } 182 for (;;) { 183 SMBS_ST_LOCK(ssp); 184 if (ssp->ss_flags & SMBS_RECONNECTING) { 185 msleep(&ssp->ss_vcgenid, SMBS_ST_LOCKPTR(ssp), 186 PWAIT | PDROP, "90trcn", hz); 187 if (smb_td_intr(rqp->sr_cred->scr_td)) 188 return EINTR; 189 continue; 190 } 191 if (smb_share_valid(ssp) || (ssp->ss_flags & SMBS_CONNECTED) == 0) { 192 SMBS_ST_UNLOCK(ssp); 193 } else { 194 SMBS_ST_UNLOCK(ssp); 195 error = smb_iod_request(rqp->sr_vc->vc_iod, 196 SMBIOD_EV_TREECONNECT | SMBIOD_EV_SYNC, ssp); 197 if (error) 198 return error; 199 } 200 error = smb_iod_addrq(rqp); 201 if (error != EXDEV) 202 break; 203 } 204 return error; 205 } 206 207 void 208 smb_rq_wstart(struct smb_rq *rqp) 209 { 210 rqp->sr_wcount = mb_reserve(&rqp->sr_rq, sizeof(u_int8_t)); 211 rqp->sr_rq.mb_count = 0; 212 } 213 214 void 215 smb_rq_wend(struct smb_rq *rqp) 216 { 217 if (rqp->sr_wcount == NULL) { 218 SMBERROR("no wcount\n"); /* actually panic */ 219 return; 220 } 221 if (rqp->sr_rq.mb_count & 1) 222 SMBERROR("odd word count\n"); 223 *rqp->sr_wcount = rqp->sr_rq.mb_count / 2; 224 } 225 226 void 227 smb_rq_bstart(struct smb_rq *rqp) 228 { 229 rqp->sr_bcount = (u_short*)mb_reserve(&rqp->sr_rq, sizeof(u_short)); 230 rqp->sr_rq.mb_count = 0; 231 } 232 233 void 234 smb_rq_bend(struct smb_rq *rqp) 235 { 236 int bcnt; 237 238 if (rqp->sr_bcount == NULL) { 239 SMBERROR("no bcount\n"); /* actually panic */ 240 return; 241 } 242 bcnt = rqp->sr_rq.mb_count; 243 if (bcnt > 0xffff) 244 SMBERROR("byte count too large (%d)\n", bcnt); 245 *rqp->sr_bcount = htole16(bcnt); 246 } 247 248 int 249 smb_rq_intr(struct smb_rq *rqp) 250 { 251 if (rqp->sr_flags & SMBR_INTR) 252 return EINTR; 253 return smb_td_intr(rqp->sr_cred->scr_td); 254 } 255 256 int 257 smb_rq_getrequest(struct smb_rq *rqp, struct mbchain **mbpp) 258 { 259 *mbpp = &rqp->sr_rq; 260 return 0; 261 } 262 263 int 264 smb_rq_getreply(struct smb_rq *rqp, struct mdchain **mbpp) 265 { 266 *mbpp = &rqp->sr_rp; 267 return 0; 268 } 269 270 static int 271 smb_rq_getenv(struct smb_connobj *layer, 272 struct smb_vc **vcpp, struct smb_share **sspp) 273 { 274 struct smb_vc *vcp = NULL; 275 struct smb_share *ssp = NULL; 276 struct smb_connobj *cp; 277 int error = 0; 278 279 switch (layer->co_level) { 280 case SMBL_VC: 281 vcp = CPTOVC(layer); 282 if (layer->co_parent == NULL) { 283 SMBERROR("zombie VC %s\n", vcp->vc_srvname); 284 error = EINVAL; 285 break; 286 } 287 break; 288 case SMBL_SHARE: 289 ssp = CPTOSS(layer); 290 cp = layer->co_parent; 291 if (cp == NULL) { 292 SMBERROR("zombie share %s\n", ssp->ss_name); 293 error = EINVAL; 294 break; 295 } 296 error = smb_rq_getenv(cp, &vcp, NULL); 297 if (error) 298 break; 299 break; 300 default: 301 SMBERROR("invalid layer %d passed\n", layer->co_level); 302 error = EINVAL; 303 } 304 if (vcpp) 305 *vcpp = vcp; 306 if (sspp) 307 *sspp = ssp; 308 return error; 309 } 310 311 /* 312 * Wait for reply on the request 313 */ 314 static int 315 smb_rq_reply(struct smb_rq *rqp) 316 { 317 struct mdchain *mdp = &rqp->sr_rp; 318 u_int32_t tdw; 319 u_int8_t tb; 320 int error, rperror = 0; 321 322 error = smb_iod_waitrq(rqp); 323 if (error) 324 return error; 325 error = md_get_uint32(mdp, &tdw); 326 if (error) 327 return error; 328 error = md_get_uint8(mdp, &tb); 329 if (rqp->sr_vc->vc_hflags2 & SMB_FLAGS2_ERR_STATUS) { 330 error = md_get_uint32le(mdp, &rqp->sr_error); 331 } else { 332 error = md_get_uint8(mdp, &rqp->sr_errclass); 333 error = md_get_uint8(mdp, &tb); 334 error = md_get_uint16le(mdp, &rqp->sr_serror); 335 if (!error) 336 rperror = smb_maperror(rqp->sr_errclass, rqp->sr_serror); 337 } 338 error = md_get_uint8(mdp, &rqp->sr_rpflags); 339 error = md_get_uint16le(mdp, &rqp->sr_rpflags2); 340 341 error = md_get_uint32(mdp, &tdw); 342 error = md_get_uint32(mdp, &tdw); 343 error = md_get_uint32(mdp, &tdw); 344 345 error = md_get_uint16le(mdp, &rqp->sr_rptid); 346 error = md_get_uint16le(mdp, &rqp->sr_rppid); 347 error = md_get_uint16le(mdp, &rqp->sr_rpuid); 348 error = md_get_uint16le(mdp, &rqp->sr_rpmid); 349 350 SMBSDEBUG("M:%04x, P:%04x, U:%04x, T:%04x, E: %d:%d\n", 351 rqp->sr_rpmid, rqp->sr_rppid, rqp->sr_rpuid, rqp->sr_rptid, 352 rqp->sr_errclass, rqp->sr_serror); 353 return error ? error : rperror; 354 } 355 356 357 #define ALIGN4(a) (((a) + 3) & ~3) 358 359 /* 360 * TRANS2 request implementation 361 */ 362 int 363 smb_t2_alloc(struct smb_connobj *layer, u_short setup, struct smb_cred *scred, 364 struct smb_t2rq **t2pp) 365 { 366 struct smb_t2rq *t2p; 367 int error; 368 369 MALLOC(t2p, struct smb_t2rq *, sizeof(*t2p), M_SMBRQ, M_WAITOK); 370 if (t2p == NULL) 371 return ENOMEM; 372 error = smb_t2_init(t2p, layer, setup, scred); 373 t2p->t2_flags |= SMBT2_ALLOCED; 374 if (error) { 375 smb_t2_done(t2p); 376 return error; 377 } 378 *t2pp = t2p; 379 return 0; 380 } 381 382 int 383 smb_t2_init(struct smb_t2rq *t2p, struct smb_connobj *source, u_short setup, 384 struct smb_cred *scred) 385 { 386 int error; 387 388 bzero(t2p, sizeof(*t2p)); 389 t2p->t2_source = source; 390 t2p->t2_setupcount = 1; 391 t2p->t2_setupdata = t2p->t2_setup; 392 t2p->t2_setup[0] = setup; 393 t2p->t2_fid = 0xffff; 394 t2p->t2_cred = scred; 395 error = smb_rq_getenv(source, &t2p->t2_vc, NULL); 396 if (error) 397 return error; 398 return 0; 399 } 400 401 void 402 smb_t2_done(struct smb_t2rq *t2p) 403 { 404 mb_done(&t2p->t2_tparam); 405 mb_done(&t2p->t2_tdata); 406 md_done(&t2p->t2_rparam); 407 md_done(&t2p->t2_rdata); 408 if (t2p->t2_flags & SMBT2_ALLOCED) 409 free(t2p, M_SMBRQ); 410 } 411 412 static int 413 smb_t2_placedata(struct mbuf *mtop, u_int16_t offset, u_int16_t count, 414 struct mdchain *mdp) 415 { 416 struct mbuf *m, *m0; 417 int len; 418 419 m0 = m_split(mtop, offset, M_TRYWAIT); 420 if (m0 == NULL) 421 return EBADRPC; 422 len = m_length(m0, &m); 423 m->m_len -= len - count; 424 if (mdp->md_top == NULL) { 425 md_initm(mdp, m0); 426 } else 427 m_cat(mdp->md_top, m0); 428 return 0; 429 } 430 431 static int 432 smb_t2_reply(struct smb_t2rq *t2p) 433 { 434 struct mdchain *mdp; 435 struct smb_rq *rqp = t2p->t2_rq; 436 int error, totpgot, totdgot; 437 u_int16_t totpcount, totdcount, pcount, poff, doff, pdisp, ddisp; 438 u_int16_t tmp, bc, dcount; 439 u_int8_t wc; 440 441 error = smb_rq_reply(rqp); 442 if (error) 443 return error; 444 if ((t2p->t2_flags & SMBT2_ALLSENT) == 0) { 445 /* 446 * this is an interim response, ignore it. 447 */ 448 SMBRQ_SLOCK(rqp); 449 md_next_record(&rqp->sr_rp); 450 SMBRQ_SUNLOCK(rqp); 451 return 0; 452 } 453 /* 454 * Now we have to get all subsequent responses. The CIFS specification 455 * says that they can be disordered which is weird. 456 * TODO: timo 457 */ 458 totpgot = totdgot = 0; 459 totpcount = totdcount = 0xffff; 460 mdp = &rqp->sr_rp; 461 for (;;) { 462 m_dumpm(mdp->md_top); 463 if ((error = md_get_uint8(mdp, &wc)) != 0) 464 break; 465 if (wc < 10) { 466 error = ENOENT; 467 break; 468 } 469 if ((error = md_get_uint16le(mdp, &tmp)) != 0) 470 break; 471 if (totpcount > tmp) 472 totpcount = tmp; 473 md_get_uint16le(mdp, &tmp); 474 if (totdcount > tmp) 475 totdcount = tmp; 476 if ((error = md_get_uint16le(mdp, &tmp)) != 0 || /* reserved */ 477 (error = md_get_uint16le(mdp, &pcount)) != 0 || 478 (error = md_get_uint16le(mdp, &poff)) != 0 || 479 (error = md_get_uint16le(mdp, &pdisp)) != 0) 480 break; 481 if (pcount != 0 && pdisp != totpgot) { 482 SMBERROR("Can't handle disordered parameters %d:%d\n", 483 pdisp, totpgot); 484 error = EINVAL; 485 break; 486 } 487 if ((error = md_get_uint16le(mdp, &dcount)) != 0 || 488 (error = md_get_uint16le(mdp, &doff)) != 0 || 489 (error = md_get_uint16le(mdp, &ddisp)) != 0) 490 break; 491 if (dcount != 0 && ddisp != totdgot) { 492 SMBERROR("Can't handle disordered data\n"); 493 error = EINVAL; 494 break; 495 } 496 md_get_uint8(mdp, &wc); 497 md_get_uint8(mdp, NULL); 498 tmp = wc; 499 while (tmp--) 500 md_get_uint16(mdp, NULL); 501 if ((error = md_get_uint16le(mdp, &bc)) != 0) 502 break; 503 /* tmp = SMB_HDRLEN + 1 + 10 * 2 + 2 * wc + 2;*/ 504 if (dcount) { 505 error = smb_t2_placedata(mdp->md_top, doff, dcount, 506 &t2p->t2_rdata); 507 if (error) 508 break; 509 } 510 if (pcount) { 511 error = smb_t2_placedata(mdp->md_top, poff, pcount, 512 &t2p->t2_rparam); 513 if (error) 514 break; 515 } 516 totpgot += pcount; 517 totdgot += dcount; 518 if (totpgot >= totpcount && totdgot >= totdcount) { 519 error = 0; 520 t2p->t2_flags |= SMBT2_ALLRECV; 521 break; 522 } 523 /* 524 * We're done with this reply, look for the next one. 525 */ 526 SMBRQ_SLOCK(rqp); 527 md_next_record(&rqp->sr_rp); 528 SMBRQ_SUNLOCK(rqp); 529 error = smb_rq_reply(rqp); 530 if (error) 531 break; 532 } 533 return error; 534 } 535 536 /* 537 * Perform a full round of TRANS2 request 538 */ 539 static int 540 smb_t2_request_int(struct smb_t2rq *t2p) 541 { 542 struct smb_vc *vcp = t2p->t2_vc; 543 struct smb_cred *scred = t2p->t2_cred; 544 struct mbchain *mbp; 545 struct mdchain *mdp, mbparam, mbdata; 546 struct mbuf *m; 547 struct smb_rq *rqp; 548 int totpcount, leftpcount, totdcount, leftdcount, len, txmax, i; 549 int error, doff, poff, txdcount, txpcount, nmlen; 550 551 m = t2p->t2_tparam.mb_top; 552 if (m) { 553 md_initm(&mbparam, m); /* do not free it! */ 554 totpcount = m_fixhdr(m); 555 if (totpcount > 0xffff) /* maxvalue for u_short */ 556 return EINVAL; 557 } else 558 totpcount = 0; 559 m = t2p->t2_tdata.mb_top; 560 if (m) { 561 md_initm(&mbdata, m); /* do not free it! */ 562 totdcount = m_fixhdr(m); 563 if (totdcount > 0xffff) 564 return EINVAL; 565 } else 566 totdcount = 0; 567 leftdcount = totdcount; 568 leftpcount = totpcount; 569 txmax = vcp->vc_txmax; 570 error = smb_rq_alloc(t2p->t2_source, t2p->t_name ? 571 SMB_COM_TRANSACTION : SMB_COM_TRANSACTION2, scred, &rqp); 572 if (error) 573 return error; 574 rqp->sr_flags |= SMBR_MULTIPACKET; 575 t2p->t2_rq = rqp; 576 mbp = &rqp->sr_rq; 577 smb_rq_wstart(rqp); 578 mb_put_uint16le(mbp, totpcount); 579 mb_put_uint16le(mbp, totdcount); 580 mb_put_uint16le(mbp, t2p->t2_maxpcount); 581 mb_put_uint16le(mbp, t2p->t2_maxdcount); 582 mb_put_uint8(mbp, t2p->t2_maxscount); 583 mb_put_uint8(mbp, 0); /* reserved */ 584 mb_put_uint16le(mbp, 0); /* flags */ 585 mb_put_uint32le(mbp, 0); /* Timeout */ 586 mb_put_uint16le(mbp, 0); /* reserved 2 */ 587 len = mb_fixhdr(mbp); 588 /* 589 * now we have known packet size as 590 * ALIGN4(len + 5 * 2 + setupcount * 2 + 2 + strlen(name) + 1), 591 * and need to decide which parts should go into the first request 592 */ 593 nmlen = t2p->t_name ? strlen(t2p->t_name) : 0; 594 len = ALIGN4(len + 5 * 2 + t2p->t2_setupcount * 2 + 2 + nmlen + 1); 595 if (len + leftpcount > txmax) { 596 txpcount = min(leftpcount, txmax - len); 597 poff = len; 598 txdcount = 0; 599 doff = 0; 600 } else { 601 txpcount = leftpcount; 602 poff = txpcount ? len : 0; 603 len = ALIGN4(len + txpcount); 604 txdcount = min(leftdcount, txmax - len); 605 doff = txdcount ? len : 0; 606 } 607 leftpcount -= txpcount; 608 leftdcount -= txdcount; 609 mb_put_uint16le(mbp, txpcount); 610 mb_put_uint16le(mbp, poff); 611 mb_put_uint16le(mbp, txdcount); 612 mb_put_uint16le(mbp, doff); 613 mb_put_uint8(mbp, t2p->t2_setupcount); 614 mb_put_uint8(mbp, 0); 615 for (i = 0; i < t2p->t2_setupcount; i++) 616 mb_put_uint16le(mbp, t2p->t2_setupdata[i]); 617 smb_rq_wend(rqp); 618 smb_rq_bstart(rqp); 619 /* TDUNICODE */ 620 if (t2p->t_name) 621 mb_put_mem(mbp, t2p->t_name, nmlen, MB_MSYSTEM); 622 mb_put_uint8(mbp, 0); /* terminating zero */ 623 len = mb_fixhdr(mbp); 624 if (txpcount) { 625 mb_put_mem(mbp, NULL, ALIGN4(len) - len, MB_MZERO); 626 error = md_get_mbuf(&mbparam, txpcount, &m); 627 SMBSDEBUG("%d:%d:%d\n", error, txpcount, txmax); 628 if (error) 629 goto freerq; 630 mb_put_mbuf(mbp, m); 631 } 632 len = mb_fixhdr(mbp); 633 if (txdcount) { 634 mb_put_mem(mbp, NULL, ALIGN4(len) - len, MB_MZERO); 635 error = md_get_mbuf(&mbdata, txdcount, &m); 636 if (error) 637 goto freerq; 638 mb_put_mbuf(mbp, m); 639 } 640 smb_rq_bend(rqp); /* incredible, but thats it... */ 641 error = smb_rq_enqueue(rqp); 642 if (error) 643 goto freerq; 644 if (leftpcount == 0 && leftdcount == 0) 645 t2p->t2_flags |= SMBT2_ALLSENT; 646 error = smb_t2_reply(t2p); 647 if (error) 648 goto bad; 649 while (leftpcount || leftdcount) { 650 error = smb_rq_new(rqp, t2p->t_name ? 651 SMB_COM_TRANSACTION_SECONDARY : SMB_COM_TRANSACTION2_SECONDARY); 652 if (error) 653 goto bad; 654 mbp = &rqp->sr_rq; 655 smb_rq_wstart(rqp); 656 mb_put_uint16le(mbp, totpcount); 657 mb_put_uint16le(mbp, totdcount); 658 len = mb_fixhdr(mbp); 659 /* 660 * now we have known packet size as 661 * ALIGN4(len + 7 * 2 + 2) for T2 request, and -2 for T one, 662 * and need to decide which parts should go into request 663 */ 664 len = ALIGN4(len + 6 * 2 + 2); 665 if (t2p->t_name == NULL) 666 len += 2; 667 if (len + leftpcount > txmax) { 668 txpcount = min(leftpcount, txmax - len); 669 poff = len; 670 txdcount = 0; 671 doff = 0; 672 } else { 673 txpcount = leftpcount; 674 poff = txpcount ? len : 0; 675 len = ALIGN4(len + txpcount); 676 txdcount = min(leftdcount, txmax - len); 677 doff = txdcount ? len : 0; 678 } 679 mb_put_uint16le(mbp, txpcount); 680 mb_put_uint16le(mbp, poff); 681 mb_put_uint16le(mbp, totpcount - leftpcount); 682 mb_put_uint16le(mbp, txdcount); 683 mb_put_uint16le(mbp, doff); 684 mb_put_uint16le(mbp, totdcount - leftdcount); 685 leftpcount -= txpcount; 686 leftdcount -= txdcount; 687 if (t2p->t_name == NULL) 688 mb_put_uint16le(mbp, t2p->t2_fid); 689 smb_rq_wend(rqp); 690 smb_rq_bstart(rqp); 691 mb_put_uint8(mbp, 0); /* name */ 692 len = mb_fixhdr(mbp); 693 if (txpcount) { 694 mb_put_mem(mbp, NULL, ALIGN4(len) - len, MB_MZERO); 695 error = md_get_mbuf(&mbparam, txpcount, &m); 696 if (error) 697 goto bad; 698 mb_put_mbuf(mbp, m); 699 } 700 len = mb_fixhdr(mbp); 701 if (txdcount) { 702 mb_put_mem(mbp, NULL, ALIGN4(len) - len, MB_MZERO); 703 error = md_get_mbuf(&mbdata, txdcount, &m); 704 if (error) 705 goto bad; 706 mb_put_mbuf(mbp, m); 707 } 708 smb_rq_bend(rqp); 709 rqp->sr_state = SMBRQ_NOTSENT; 710 error = smb_iod_request(vcp->vc_iod, SMBIOD_EV_NEWRQ, NULL); 711 if (error) 712 goto bad; 713 } /* while left params or data */ 714 t2p->t2_flags |= SMBT2_ALLSENT; 715 mdp = &t2p->t2_rdata; 716 if (mdp->md_top) { 717 m_fixhdr(mdp->md_top); 718 md_initm(mdp, mdp->md_top); 719 } 720 mdp = &t2p->t2_rparam; 721 if (mdp->md_top) { 722 m_fixhdr(mdp->md_top); 723 md_initm(mdp, mdp->md_top); 724 } 725 bad: 726 smb_iod_removerq(rqp); 727 freerq: 728 smb_rq_done(rqp); 729 if (error) { 730 if (rqp->sr_flags & SMBR_RESTART) 731 t2p->t2_flags |= SMBT2_RESTART; 732 md_done(&t2p->t2_rparam); 733 md_done(&t2p->t2_rdata); 734 } 735 return error; 736 } 737 738 int 739 smb_t2_request(struct smb_t2rq *t2p) 740 { 741 int error = EINVAL, i; 742 743 for (i = 0; i < SMB_MAXRCN; i++) { 744 t2p->t2_flags &= ~SMBR_RESTART; 745 error = smb_t2_request_int(t2p); 746 if (error == 0) 747 break; 748 if ((t2p->t2_flags & (SMBT2_RESTART | SMBT2_NORESTART)) != SMBT2_RESTART) 749 break; 750 } 751 return error; 752 }
Cache object: 8fc67c2fb1368977aa532d7a84e1cda9
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