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