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: src/sys/netsmb/smb_trantcp.c,v 1.3.2.1 2001/05/22 08:32:34 bp Exp $ 33 * $DragonFly: src/sys/netproto/smb/smb_trantcp.c,v 1.21 2008/01/05 14:02:40 swildner Exp $ 34 */ 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/malloc.h> 39 #include <sys/mbuf.h> 40 #include <sys/proc.h> 41 #include <sys/protosw.h> 42 #include <sys/resourcevar.h> 43 #include <sys/socket.h> 44 #include <sys/socketvar.h> 45 #include <sys/socketops.h> 46 #include <sys/poll.h> 47 #include <sys/uio.h> 48 #include <sys/fcntl.h> 49 #include <sys/sysctl.h> 50 #include <sys/thread2.h> 51 52 #include <net/if.h> 53 #include <net/route.h> 54 55 #include <netinet/in.h> 56 #include <netinet/tcp.h> 57 58 #include <sys/mchain.h> 59 60 #include "netbios.h" 61 62 #include "smb.h" 63 #include "smb_conn.h" 64 #include "smb_tran.h" 65 #include "smb_trantcp.h" 66 #include "smb_subr.h" 67 68 #define M_NBDATA M_PCB 69 70 static int smb_tcpsndbuf = 10 * 1024; 71 static int smb_tcprcvbuf = 10 * 1024; 72 73 SYSCTL_DECL(_net_smb); 74 SYSCTL_INT(_net_smb, OID_AUTO, tcpsndbuf, CTLFLAG_RW, &smb_tcpsndbuf, 0, ""); 75 SYSCTL_INT(_net_smb, OID_AUTO, tcprcvbuf, CTLFLAG_RW, &smb_tcprcvbuf, 0, ""); 76 77 #define nb_sosend(so,m,flags,p) \ 78 so_pru_sosend(so, NULL, NULL, m, NULL, flags, td) 79 80 static int nbssn_recv(struct nbpcb *nbp, struct mbuf **mpp, int *lenp, 81 u_int8_t *rpcodep, struct thread *td); 82 static int smb_nbst_disconnect(struct smb_vc *vcp, struct thread *td); 83 84 static int 85 nb_setsockopt_int(struct socket *so, int level, int name, int val) 86 { 87 struct sockopt sopt; 88 89 bzero(&sopt, sizeof(sopt)); 90 sopt.sopt_level = level; 91 sopt.sopt_name = name; 92 sopt.sopt_val = &val; 93 sopt.sopt_valsize = sizeof(val); 94 return sosetopt(so, &sopt); 95 } 96 97 static __inline int 98 nb_poll(struct nbpcb *nbp, int events, struct thread *td) 99 { 100 return so_pru_sopoll(nbp->nbp_tso, events, NULL); 101 } 102 103 static int 104 nbssn_rselect(struct nbpcb *nbp, struct timeval *tv, int events, struct thread *td) 105 { 106 struct lwp *lp = td->td_lwp; 107 struct timeval atv, rtv, ttv; 108 int timo, error; 109 110 if (tv) { 111 atv = *tv; 112 if (itimerfix(&atv)) { 113 error = EINVAL; 114 goto done; 115 } 116 getmicrouptime(&rtv); 117 timevaladd(&atv, &rtv); 118 } 119 timo = 0; 120 KKASSERT(lp); 121 retry: 122 lp->lwp_flag |= LWP_SELECT; 123 error = nb_poll(nbp, events, td); 124 if (error) { 125 error = 0; 126 goto done; 127 } 128 if (tv) { 129 getmicrouptime(&rtv); 130 if (timevalcmp(&rtv, &atv, >=)) 131 goto done; 132 ttv = atv; 133 timevalsub(&ttv, &rtv); 134 timo = tvtohz_high(&ttv); 135 } 136 crit_enter(); 137 if ((lp->lwp_flag & LWP_SELECT) == 0) { 138 crit_exit(); 139 goto retry; 140 } 141 lp->lwp_flag &= ~LWP_SELECT; 142 error = tsleep((caddr_t)&selwait, 0, "nbsel", timo); 143 crit_exit(); 144 done: 145 lp->lwp_flag &= ~LWP_SELECT; 146 if (error == ERESTART) 147 return 0; 148 return error; 149 } 150 151 static int 152 nb_intr(struct nbpcb *nbp, struct thread *td) 153 { 154 return 0; 155 } 156 157 static void 158 nb_upcall(struct socket *so, void *arg, int waitflag) 159 { 160 struct nbpcb *nbp = arg; 161 162 if (arg == NULL || nbp->nbp_selectid == NULL) 163 return; 164 wakeup(nbp->nbp_selectid); 165 } 166 167 static int 168 nb_sethdr(struct mbuf *m, u_int8_t type, u_int32_t len) 169 { 170 u_int32_t *p = mtod(m, u_int32_t *); 171 172 *p = htonl((len & 0x1FFFF) | (type << 24)); 173 return 0; 174 } 175 176 static int 177 nb_put_name(struct mbchain *mbp, struct sockaddr_nb *snb) 178 { 179 int error; 180 u_char seglen, *cp; 181 182 cp = snb->snb_name; 183 if (*cp == 0) 184 return EINVAL; 185 NBDEBUG("[%s]\n", cp); 186 for (;;) { 187 seglen = (*cp) + 1; 188 error = mb_put_mem(mbp, cp, seglen, MB_MSYSTEM); 189 if (error) 190 return error; 191 if (seglen == 1) 192 break; 193 cp += seglen; 194 } 195 return 0; 196 } 197 198 static int 199 nb_connect_in(struct nbpcb *nbp, struct sockaddr_in *to, struct thread *td) 200 { 201 struct socket *so; 202 int error; 203 204 error = socreate(AF_INET, &so, SOCK_STREAM, IPPROTO_TCP, td); 205 if (error) 206 return error; 207 nbp->nbp_tso = so; 208 so->so_upcallarg = (caddr_t)nbp; 209 so->so_upcall = nb_upcall; 210 so->so_rcv.ssb_flags |= SSB_UPCALL; 211 so->so_rcv.ssb_timeo = (5 * hz); 212 so->so_snd.ssb_timeo = (5 * hz); 213 error = soreserve(so, nbp->nbp_sndbuf, nbp->nbp_rcvbuf, 214 &td->td_proc->p_rlimit[RLIMIT_SBSIZE]); 215 if (error) 216 goto bad; 217 nb_setsockopt_int(so, SOL_SOCKET, SO_KEEPALIVE, 1); 218 nb_setsockopt_int(so, IPPROTO_TCP, TCP_NODELAY, 1); 219 so->so_rcv.ssb_flags &= ~SSB_NOINTR; 220 so->so_snd.ssb_flags &= ~SSB_NOINTR; 221 error = soconnect(so, (struct sockaddr*)to, td); 222 223 /* 224 * If signals are allowed nbssn_recv() can wind up in a hard loop 225 * on EWOULDBLOCK. 226 */ 227 so->so_rcv.ssb_flags |= SSB_NOINTR; 228 so->so_snd.ssb_flags |= SSB_NOINTR; 229 if (error) 230 goto bad; 231 crit_enter(); 232 while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) { 233 tsleep(&so->so_timeo, 0, "nbcon", 2 * hz); 234 if ((so->so_state & SS_ISCONNECTING) && so->so_error == 0 && 235 (error = nb_intr(nbp, td)) != 0) { 236 so->so_state &= ~SS_ISCONNECTING; 237 crit_exit(); 238 goto bad; 239 } 240 } 241 if (so->so_error) { 242 error = so->so_error; 243 so->so_error = 0; 244 crit_exit(); 245 goto bad; 246 } 247 crit_exit(); 248 return 0; 249 bad: 250 smb_nbst_disconnect(nbp->nbp_vc, td); 251 return error; 252 } 253 254 static int 255 nbssn_rq_request(struct nbpcb *nbp, struct thread *td) 256 { 257 struct mbchain mb, *mbp = &mb; 258 struct mdchain md, *mdp = &md; 259 struct mbuf *m0; 260 struct timeval tv; 261 struct sockaddr_in sin; 262 u_short port; 263 u_int8_t rpcode; 264 int error, rplen; 265 266 error = mb_init(mbp); 267 if (error) 268 return error; 269 mb_put_uint32le(mbp, 0); 270 nb_put_name(mbp, nbp->nbp_paddr); 271 nb_put_name(mbp, nbp->nbp_laddr); 272 nb_sethdr(mbp->mb_top, NB_SSN_REQUEST, mb_fixhdr(mbp) - 4); 273 error = nb_sosend(nbp->nbp_tso, mbp->mb_top, 0, td); 274 if (!error) { 275 nbp->nbp_state = NBST_RQSENT; 276 } 277 mb_detach(mbp); 278 mb_done(mbp); 279 if (error) 280 return error; 281 TIMESPEC_TO_TIMEVAL(&tv, &nbp->nbp_timo); 282 error = nbssn_rselect(nbp, &tv, POLLIN, td); 283 if (error == EWOULDBLOCK) { /* Timeout */ 284 NBDEBUG("initial request timeout\n"); 285 return ETIMEDOUT; 286 } 287 if (error) /* restart or interrupt */ 288 return error; 289 error = nbssn_recv(nbp, &m0, &rplen, &rpcode, td); 290 if (error) { 291 NBDEBUG("recv() error %d\n", error); 292 return error; 293 } 294 /* 295 * Process NETBIOS reply 296 */ 297 if (m0) 298 md_initm(mdp, m0); 299 error = 0; 300 do { 301 if (rpcode == NB_SSN_POSRESP) { 302 nbp->nbp_state = NBST_SESSION; 303 nbp->nbp_flags |= NBF_CONNECTED; 304 break; 305 } 306 if (rpcode != NB_SSN_RTGRESP) { 307 error = ECONNABORTED; 308 break; 309 } 310 if (rplen != 6) { 311 error = ECONNABORTED; 312 break; 313 } 314 md_get_mem(mdp, (caddr_t)&sin.sin_addr, 4, MB_MSYSTEM); 315 md_get_uint16(mdp, &port); 316 sin.sin_port = port; 317 nbp->nbp_state = NBST_RETARGET; 318 smb_nbst_disconnect(nbp->nbp_vc, td); 319 error = nb_connect_in(nbp, &sin, td); 320 if (!error) 321 error = nbssn_rq_request(nbp, td); 322 if (error) { 323 smb_nbst_disconnect(nbp->nbp_vc, td); 324 break; 325 } 326 } while(0); 327 if (m0) 328 md_done(mdp); 329 return error; 330 } 331 332 static int 333 nbssn_recvhdr(struct nbpcb *nbp, int *lenp, 334 u_int8_t *rpcodep, int flags, struct thread *td) 335 { 336 struct socket *so = nbp->nbp_tso; 337 struct uio auio; 338 struct iovec aio; 339 u_int32_t len; 340 int error; 341 342 aio.iov_base = (caddr_t)&len; 343 aio.iov_len = sizeof(len); 344 auio.uio_iov = &aio; 345 auio.uio_iovcnt = 1; 346 auio.uio_segflg = UIO_SYSSPACE; 347 auio.uio_rw = UIO_READ; 348 auio.uio_offset = 0; 349 auio.uio_resid = sizeof(len); 350 auio.uio_td = td; 351 error = so_pru_soreceive(so, NULL, &auio, NULL, NULL, &flags); 352 if (error) 353 return error; 354 if (auio.uio_resid > 0) { 355 SMBSDEBUG("short reply\n"); 356 return EPIPE; 357 } 358 len = ntohl(len); 359 *rpcodep = (len >> 24) & 0xFF; 360 len &= 0x1ffff; 361 if (len > SMB_MAXPKTLEN) { 362 SMBERROR("packet too long (%d)\n", len); 363 return EFBIG; 364 } 365 *lenp = len; 366 return 0; 367 } 368 369 static int 370 nbssn_recv(struct nbpcb *nbp, struct mbuf **mpp, int *lenp, 371 u_int8_t *rpcodep, struct thread *td) 372 { 373 struct socket *so = nbp->nbp_tso; 374 struct sockbuf sio; 375 u_int8_t rpcode; 376 int error, rcvflg, savelen; 377 378 if (so == NULL) 379 return ENOTCONN; 380 381 sbinit(&sio, 0); 382 if (mpp) 383 *mpp = NULL; 384 385 for(;;) { 386 error = nbssn_recvhdr(nbp, &savelen, &rpcode, MSG_DONTWAIT, td); 387 if (so->so_state & 388 (SS_ISDISCONNECTING | SS_ISDISCONNECTED | SS_CANTRCVMORE)) { 389 nbp->nbp_state = NBST_CLOSED; 390 NBDEBUG("session closed by peer\n"); 391 error = ECONNRESET; 392 break; 393 } 394 if (error) 395 break; 396 if (savelen == 0 && nbp->nbp_state != NBST_SESSION) 397 break; 398 if (rpcode == NB_SSN_KEEPALIVE) 399 continue; 400 do { 401 sbinit(&sio, savelen); 402 rcvflg = MSG_WAITALL; 403 error = so_pru_soreceive(so, NULL, NULL, &sio, 404 NULL, &rcvflg); 405 } while (error == EWOULDBLOCK || error == EINTR || 406 error == ERESTART); 407 if (error) 408 break; 409 if (sio.sb_cc != savelen) { 410 SMBERROR("packet is shorter than expected\n"); 411 error = EPIPE; 412 m_freem(sio.sb_mb); 413 break; 414 } 415 if (nbp->nbp_state == NBST_SESSION && rpcode == NB_SSN_MESSAGE) 416 break; 417 NBDEBUG("non-session packet %x\n", rpcode); 418 m_freem(sio.sb_mb); 419 sio.sb_mb = NULL; 420 sio.sb_cc = 0; 421 } 422 if (error == 0) { 423 if (mpp) 424 *mpp = sio.sb_mb; 425 else 426 m_freem(sio.sb_mb); 427 *lenp = sio.sb_cc; 428 *rpcodep = rpcode; 429 } 430 return (error); 431 } 432 433 /* 434 * SMB transport interface 435 */ 436 static int 437 smb_nbst_create(struct smb_vc *vcp, struct thread *td) 438 { 439 struct nbpcb *nbp; 440 441 MALLOC(nbp, struct nbpcb *, sizeof *nbp, M_NBDATA, M_WAITOK | M_ZERO); 442 nbp->nbp_timo.tv_sec = 15; /* XXX: sysctl ? */ 443 nbp->nbp_state = NBST_CLOSED; 444 nbp->nbp_vc = vcp; 445 nbp->nbp_sndbuf = smb_tcpsndbuf; 446 nbp->nbp_rcvbuf = smb_tcprcvbuf; 447 vcp->vc_tdata = nbp; 448 return 0; 449 } 450 451 static int 452 smb_nbst_done(struct smb_vc *vcp, struct thread *td) 453 { 454 struct nbpcb *nbp = vcp->vc_tdata; 455 456 if (nbp == NULL) 457 return ENOTCONN; 458 smb_nbst_disconnect(vcp, td); 459 if (nbp->nbp_laddr) 460 kfree(nbp->nbp_laddr, M_SONAME); 461 if (nbp->nbp_paddr) 462 kfree(nbp->nbp_paddr, M_SONAME); 463 kfree(nbp, M_NBDATA); 464 return 0; 465 } 466 467 static int 468 smb_nbst_bind(struct smb_vc *vcp, struct sockaddr *sap, struct thread *td) 469 { 470 struct nbpcb *nbp = vcp->vc_tdata; 471 struct sockaddr_nb *snb; 472 int error, slen; 473 474 NBDEBUG("\n"); 475 error = EINVAL; 476 do { 477 if (nbp->nbp_flags & NBF_LOCADDR) 478 break; 479 /* 480 * It is possible to create NETBIOS name in the kernel, 481 * but nothing prevents us to do it in the user space. 482 */ 483 if (sap == NULL) 484 break; 485 slen = sap->sa_len; 486 if (slen < NB_MINSALEN) 487 break; 488 snb = (struct sockaddr_nb*)dup_sockaddr(sap); 489 if (snb == NULL) { 490 error = ENOMEM; 491 break; 492 } 493 nbp->nbp_laddr = snb; 494 nbp->nbp_flags |= NBF_LOCADDR; 495 error = 0; 496 } while(0); 497 return error; 498 } 499 500 static int 501 smb_nbst_connect(struct smb_vc *vcp, struct sockaddr *sap, struct thread *td) 502 { 503 struct nbpcb *nbp = vcp->vc_tdata; 504 struct sockaddr_in sin; 505 struct sockaddr_nb *snb; 506 struct timespec ts1, ts2; 507 int error, slen; 508 509 NBDEBUG("\n"); 510 if (nbp->nbp_tso != NULL) 511 return EISCONN; 512 if (nbp->nbp_laddr == NULL) 513 return EINVAL; 514 slen = sap->sa_len; 515 if (slen < NB_MINSALEN) 516 return EINVAL; 517 if (nbp->nbp_paddr) { 518 kfree(nbp->nbp_paddr, M_SONAME); 519 nbp->nbp_paddr = NULL; 520 } 521 snb = (struct sockaddr_nb*)dup_sockaddr(sap); 522 if (snb == NULL) 523 return ENOMEM; 524 nbp->nbp_paddr = snb; 525 sin = snb->snb_addrin; 526 getnanotime(&ts1); 527 error = nb_connect_in(nbp, &sin, td); 528 if (error) 529 return error; 530 getnanotime(&ts2); 531 timespecsub(&ts2, &ts1); 532 if (ts2.tv_sec == 0 && ts2.tv_sec == 0) 533 ts2.tv_sec = 1; 534 nbp->nbp_timo = ts2; 535 timespecadd(&nbp->nbp_timo, &ts2); 536 timespecadd(&nbp->nbp_timo, &ts2); 537 timespecadd(&nbp->nbp_timo, &ts2); /* * 4 */ 538 error = nbssn_rq_request(nbp, td); 539 if (error) 540 smb_nbst_disconnect(vcp, td); 541 return error; 542 } 543 544 static int 545 smb_nbst_disconnect(struct smb_vc *vcp, struct thread *td) 546 { 547 struct nbpcb *nbp = vcp->vc_tdata; 548 struct socket *so; 549 550 if (nbp == NULL || nbp->nbp_tso == NULL) 551 return ENOTCONN; 552 if ((so = nbp->nbp_tso) != NULL) { 553 nbp->nbp_flags &= ~NBF_CONNECTED; 554 nbp->nbp_tso = (struct socket *)NULL; 555 soshutdown(so, SHUT_RDWR); 556 soclose(so, FNONBLOCK); 557 } 558 if (nbp->nbp_state != NBST_RETARGET) { 559 nbp->nbp_state = NBST_CLOSED; 560 } 561 return 0; 562 } 563 564 static int 565 smb_nbst_send(struct smb_vc *vcp, struct mbuf *m0, struct thread *td) 566 { 567 struct nbpcb *nbp = vcp->vc_tdata; 568 int error; 569 570 if (nbp->nbp_state != NBST_SESSION) { 571 error = ENOTCONN; 572 goto abort; 573 } 574 M_PREPEND(m0, 4, MB_TRYWAIT); 575 if (m0 == NULL) 576 return ENOBUFS; 577 nb_sethdr(m0, NB_SSN_MESSAGE, m_fixhdr(m0) - 4); 578 error = nb_sosend(nbp->nbp_tso, m0, 0, td); 579 return error; 580 abort: 581 if (m0) 582 m_freem(m0); 583 return error; 584 } 585 586 587 static int 588 smb_nbst_recv(struct smb_vc *vcp, struct mbuf **mpp, struct thread *td) 589 { 590 struct nbpcb *nbp = vcp->vc_tdata; 591 u_int8_t rpcode; 592 int error, rplen; 593 594 nbp->nbp_flags |= NBF_RECVLOCK; 595 error = nbssn_recv(nbp, mpp, &rplen, &rpcode, td); 596 nbp->nbp_flags &= ~NBF_RECVLOCK; 597 return error; 598 } 599 600 static void 601 smb_nbst_timo(struct smb_vc *vcp) 602 { 603 return; 604 } 605 606 static void 607 smb_nbst_intr(struct smb_vc *vcp) 608 { 609 struct nbpcb *nbp = vcp->vc_tdata; 610 611 if (nbp == NULL || nbp->nbp_tso == NULL) 612 return; 613 sorwakeup(nbp->nbp_tso); 614 sowwakeup(nbp->nbp_tso); 615 } 616 617 static int 618 smb_nbst_getparam(struct smb_vc *vcp, int param, void *data) 619 { 620 struct nbpcb *nbp = vcp->vc_tdata; 621 622 switch (param) { 623 case SMBTP_SNDSZ: 624 *(int*)data = nbp->nbp_sndbuf; 625 break; 626 case SMBTP_RCVSZ: 627 *(int*)data = nbp->nbp_rcvbuf; 628 break; 629 case SMBTP_TIMEOUT: 630 *(struct timespec*)data = nbp->nbp_timo; 631 break; 632 default: 633 return EINVAL; 634 } 635 return 0; 636 } 637 638 static int 639 smb_nbst_setparam(struct smb_vc *vcp, int param, void *data) 640 { 641 struct nbpcb *nbp = vcp->vc_tdata; 642 643 switch (param) { 644 case SMBTP_SELECTID: 645 nbp->nbp_selectid = data; 646 break; 647 default: 648 return EINVAL; 649 } 650 return 0; 651 } 652 653 /* 654 * Check for fatal errors 655 */ 656 static int 657 smb_nbst_fatal(struct smb_vc *vcp, int error) 658 { 659 switch (error) { 660 case ENOTCONN: 661 case ENETRESET: 662 case ECONNABORTED: 663 return 1; 664 } 665 return 0; 666 } 667 668 669 struct smb_tran_desc smb_tran_nbtcp_desc = { 670 SMBT_NBTCP, 671 smb_nbst_create, smb_nbst_done, 672 smb_nbst_bind, smb_nbst_connect, smb_nbst_disconnect, 673 smb_nbst_send, smb_nbst_recv, 674 smb_nbst_timo, smb_nbst_intr, 675 smb_nbst_getparam, smb_nbst_setparam, 676 smb_nbst_fatal 677 }; 678 679