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 1.2 2003/06/17 04:28:54 dillon 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/socket.h> 43 #include <sys/socketvar.h> 44 #include <sys/poll.h> 45 #include <sys/uio.h> 46 #include <sys/sysctl.h> 47 48 #include <net/if.h> 49 #include <net/route.h> 50 51 #include <netinet/in.h> 52 #include <netinet/tcp.h> 53 54 #include <sys/mchain.h> 55 56 #include <netsmb/netbios.h> 57 58 #include <netsmb/smb.h> 59 #include <netsmb/smb_conn.h> 60 #include <netsmb/smb_tran.h> 61 #include <netsmb/smb_trantcp.h> 62 #include <netsmb/smb_subr.h> 63 64 #define M_NBDATA M_PCB 65 66 static int smb_tcpsndbuf = 10 * 1024; 67 static int smb_tcprcvbuf = 10 * 1024; 68 69 SYSCTL_DECL(_net_smb); 70 SYSCTL_INT(_net_smb, OID_AUTO, tcpsndbuf, CTLFLAG_RW, &smb_tcpsndbuf, 0, ""); 71 SYSCTL_INT(_net_smb, OID_AUTO, tcprcvbuf, CTLFLAG_RW, &smb_tcprcvbuf, 0, ""); 72 73 #define nb_sosend(so,m,flags,p) (so)->so_proto->pr_usrreqs->pru_sosend( \ 74 so, NULL, 0, m, 0, flags, p) 75 76 static int nbssn_recv(struct nbpcb *nbp, struct mbuf **mpp, int *lenp, 77 u_int8_t *rpcodep, struct proc *p); 78 static int smb_nbst_disconnect(struct smb_vc *vcp, struct proc *p); 79 80 static int 81 nb_setsockopt_int(struct socket *so, int level, int name, int val) 82 { 83 struct sockopt sopt; 84 85 bzero(&sopt, sizeof(sopt)); 86 sopt.sopt_level = level; 87 sopt.sopt_name = name; 88 sopt.sopt_val = &val; 89 sopt.sopt_valsize = sizeof(val); 90 return sosetopt(so, &sopt); 91 } 92 93 static __inline int 94 nb_poll(struct nbpcb *nbp, int events, struct proc *p) 95 { 96 return nbp->nbp_tso->so_proto->pr_usrreqs->pru_sopoll(nbp->nbp_tso, 97 events, NULL, p); 98 } 99 100 static int 101 nbssn_rselect(struct nbpcb *nbp, struct timeval *tv, int events, struct proc *p) 102 { 103 struct timeval atv, rtv, ttv; 104 int s, timo, error; 105 106 if (tv) { 107 atv = *tv; 108 if (itimerfix(&atv)) { 109 error = EINVAL; 110 goto done; 111 } 112 getmicrouptime(&rtv); 113 timevaladd(&atv, &rtv); 114 } 115 timo = 0; 116 retry: 117 p->p_flag |= P_SELECT; 118 error = nb_poll(nbp, events, p); 119 if (error) { 120 error = 0; 121 goto done; 122 } 123 if (tv) { 124 getmicrouptime(&rtv); 125 if (timevalcmp(&rtv, &atv, >=)) 126 goto done; 127 ttv = atv; 128 timevalsub(&ttv, &rtv); 129 timo = tvtohz(&ttv); 130 } 131 s = splhigh(); 132 if ((p->p_flag & P_SELECT) == 0) { 133 splx(s); 134 goto retry; 135 } 136 p->p_flag &= ~P_SELECT; 137 error = tsleep((caddr_t)&selwait, PSOCK, "nbsel", timo); 138 splx(s); 139 done: 140 p->p_flag &= ~P_SELECT; 141 if (error == ERESTART) 142 return 0; 143 return error; 144 } 145 146 static int 147 nb_intr(struct nbpcb *nbp, struct proc *p) 148 { 149 return 0; 150 } 151 152 static void 153 nb_upcall(struct socket *so, void *arg, int waitflag) 154 { 155 struct nbpcb *nbp = arg; 156 157 if (arg == NULL || nbp->nbp_selectid == NULL) 158 return; 159 wakeup(nbp->nbp_selectid); 160 } 161 162 static int 163 nb_sethdr(struct mbuf *m, u_int8_t type, u_int32_t len) 164 { 165 u_int32_t *p = mtod(m, u_int32_t *); 166 167 *p = htonl((len & 0x1FFFF) | (type << 24)); 168 return 0; 169 } 170 171 static int 172 nb_put_name(struct mbchain *mbp, struct sockaddr_nb *snb) 173 { 174 int error; 175 u_char seglen, *cp; 176 177 cp = snb->snb_name; 178 if (*cp == 0) 179 return EINVAL; 180 NBDEBUG("[%s]\n", cp); 181 for (;;) { 182 seglen = (*cp) + 1; 183 error = mb_put_mem(mbp, cp, seglen, MB_MSYSTEM); 184 if (error) 185 return error; 186 if (seglen == 1) 187 break; 188 cp += seglen; 189 } 190 return 0; 191 } 192 193 static int 194 nb_connect_in(struct nbpcb *nbp, struct sockaddr_in *to, struct proc *p) 195 { 196 struct socket *so; 197 int error, s; 198 199 error = socreate(AF_INET, &so, SOCK_STREAM, IPPROTO_TCP, p); 200 if (error) 201 return error; 202 nbp->nbp_tso = so; 203 so->so_upcallarg = (caddr_t)nbp; 204 so->so_upcall = nb_upcall; 205 so->so_rcv.sb_flags |= SB_UPCALL; 206 so->so_rcv.sb_timeo = (5 * hz); 207 so->so_snd.sb_timeo = (5 * hz); 208 error = soreserve(so, nbp->nbp_sndbuf, nbp->nbp_rcvbuf); 209 if (error) 210 goto bad; 211 nb_setsockopt_int(so, SOL_SOCKET, SO_KEEPALIVE, 1); 212 nb_setsockopt_int(so, IPPROTO_TCP, TCP_NODELAY, 1); 213 so->so_rcv.sb_flags &= ~SB_NOINTR; 214 so->so_snd.sb_flags &= ~SB_NOINTR; 215 error = soconnect(so, (struct sockaddr*)to, p); 216 if (error) 217 goto bad; 218 s = splnet(); 219 while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) { 220 tsleep(&so->so_timeo, PSOCK, "nbcon", 2 * hz); 221 if ((so->so_state & SS_ISCONNECTING) && so->so_error == 0 && 222 (error = nb_intr(nbp, p)) != 0) { 223 so->so_state &= ~SS_ISCONNECTING; 224 splx(s); 225 goto bad; 226 } 227 } 228 if (so->so_error) { 229 error = so->so_error; 230 so->so_error = 0; 231 splx(s); 232 goto bad; 233 } 234 splx(s); 235 return 0; 236 bad: 237 smb_nbst_disconnect(nbp->nbp_vc, p); 238 return error; 239 } 240 241 static int 242 nbssn_rq_request(struct nbpcb *nbp, struct proc *p) 243 { 244 struct mbchain mb, *mbp = &mb; 245 struct mdchain md, *mdp = &md; 246 struct mbuf *m0; 247 struct timeval tv; 248 struct sockaddr_in sin; 249 u_short port; 250 u_int8_t rpcode; 251 int error, rplen; 252 253 error = mb_init(mbp); 254 if (error) 255 return error; 256 mb_put_uint32le(mbp, 0); 257 nb_put_name(mbp, nbp->nbp_paddr); 258 nb_put_name(mbp, nbp->nbp_laddr); 259 nb_sethdr(mbp->mb_top, NB_SSN_REQUEST, mb_fixhdr(mbp) - 4); 260 error = nb_sosend(nbp->nbp_tso, mbp->mb_top, 0, p); 261 if (!error) { 262 nbp->nbp_state = NBST_RQSENT; 263 } 264 mb_detach(mbp); 265 mb_done(mbp); 266 if (error) 267 return error; 268 TIMESPEC_TO_TIMEVAL(&tv, &nbp->nbp_timo); 269 error = nbssn_rselect(nbp, &tv, POLLIN, p); 270 if (error == EWOULDBLOCK) { /* Timeout */ 271 NBDEBUG("initial request timeout\n"); 272 return ETIMEDOUT; 273 } 274 if (error) /* restart or interrupt */ 275 return error; 276 error = nbssn_recv(nbp, &m0, &rplen, &rpcode, p); 277 if (error) { 278 NBDEBUG("recv() error %d\n", error); 279 return error; 280 } 281 /* 282 * Process NETBIOS reply 283 */ 284 if (m0) 285 md_initm(mdp, m0); 286 error = 0; 287 do { 288 if (rpcode == NB_SSN_POSRESP) { 289 nbp->nbp_state = NBST_SESSION; 290 nbp->nbp_flags |= NBF_CONNECTED; 291 break; 292 } 293 if (rpcode != NB_SSN_RTGRESP) { 294 error = ECONNABORTED; 295 break; 296 } 297 if (rplen != 6) { 298 error = ECONNABORTED; 299 break; 300 } 301 md_get_mem(mdp, (caddr_t)&sin.sin_addr, 4, MB_MSYSTEM); 302 md_get_uint16(mdp, &port); 303 sin.sin_port = port; 304 nbp->nbp_state = NBST_RETARGET; 305 smb_nbst_disconnect(nbp->nbp_vc, p); 306 error = nb_connect_in(nbp, &sin, p); 307 if (!error) 308 error = nbssn_rq_request(nbp, p); 309 if (error) { 310 smb_nbst_disconnect(nbp->nbp_vc, p); 311 break; 312 } 313 } while(0); 314 if (m0) 315 md_done(mdp); 316 return error; 317 } 318 319 static int 320 nbssn_recvhdr(struct nbpcb *nbp, int *lenp, 321 u_int8_t *rpcodep, int flags, struct proc *p) 322 { 323 struct socket *so = nbp->nbp_tso; 324 struct uio auio; 325 struct iovec aio; 326 u_int32_t len; 327 int error; 328 329 aio.iov_base = (caddr_t)&len; 330 aio.iov_len = sizeof(len); 331 auio.uio_iov = &aio; 332 auio.uio_iovcnt = 1; 333 auio.uio_segflg = UIO_SYSSPACE; 334 auio.uio_rw = UIO_READ; 335 auio.uio_offset = 0; 336 auio.uio_resid = sizeof(len); 337 auio.uio_procp = p; 338 error = so->so_proto->pr_usrreqs->pru_soreceive 339 (so, (struct sockaddr **)NULL, &auio, 340 (struct mbuf **)NULL, (struct mbuf **)NULL, &flags); 341 if (error) 342 return error; 343 if (auio.uio_resid > 0) { 344 SMBSDEBUG("short reply\n"); 345 return EPIPE; 346 } 347 len = ntohl(len); 348 *rpcodep = (len >> 24) & 0xFF; 349 len &= 0x1ffff; 350 if (len > SMB_MAXPKTLEN) { 351 SMBERROR("packet too long (%d)\n", len); 352 return EFBIG; 353 } 354 *lenp = len; 355 return 0; 356 } 357 358 static int 359 nbssn_recv(struct nbpcb *nbp, struct mbuf **mpp, int *lenp, 360 u_int8_t *rpcodep, struct proc *p) 361 { 362 struct socket *so = nbp->nbp_tso; 363 struct uio auio; 364 struct mbuf *m; 365 u_int8_t rpcode; 366 int len; 367 int error, rcvflg; 368 369 if (so == NULL) 370 return ENOTCONN; 371 372 if (mpp) 373 *mpp = NULL; 374 for(;;) { 375 m = NULL; 376 error = nbssn_recvhdr(nbp, &len, &rpcode, MSG_DONTWAIT, p); 377 if (so->so_state & 378 (SS_ISDISCONNECTING | SS_ISDISCONNECTED | SS_CANTRCVMORE)) { 379 nbp->nbp_state = NBST_CLOSED; 380 NBDEBUG("session closed by peer\n"); 381 return ECONNRESET; 382 } 383 if (error) 384 return error; 385 if (len == 0 && nbp->nbp_state != NBST_SESSION) 386 break; 387 if (rpcode == NB_SSN_KEEPALIVE) 388 continue; 389 bzero(&auio, sizeof(auio)); 390 auio.uio_resid = len; 391 auio.uio_procp = p; 392 do { 393 rcvflg = MSG_WAITALL; 394 error = so->so_proto->pr_usrreqs->pru_soreceive 395 (so, (struct sockaddr **)NULL, 396 &auio, &m, (struct mbuf **)NULL, &rcvflg); 397 } while (error == EWOULDBLOCK || error == EINTR || 398 error == ERESTART); 399 if (error) 400 break; 401 if (auio.uio_resid > 0) { 402 SMBERROR("packet is shorter than expected\n"); 403 error = EPIPE; 404 break; 405 } 406 if (nbp->nbp_state == NBST_SESSION && 407 rpcode == NB_SSN_MESSAGE) 408 break; 409 NBDEBUG("non-session packet %x\n", rpcode); 410 if (m) 411 m_freem(m); 412 } 413 if (error) { 414 if (m) 415 m_freem(m); 416 return error; 417 } 418 if (mpp) 419 *mpp = m; 420 else 421 m_freem(m); 422 *lenp = len; 423 *rpcodep = rpcode; 424 return 0; 425 } 426 427 /* 428 * SMB transport interface 429 */ 430 static int 431 smb_nbst_create(struct smb_vc *vcp, struct proc *p) 432 { 433 struct nbpcb *nbp; 434 435 MALLOC(nbp, struct nbpcb *, sizeof *nbp, M_NBDATA, M_WAITOK); 436 bzero(nbp, sizeof *nbp); 437 nbp->nbp_timo.tv_sec = 15; /* XXX: sysctl ? */ 438 nbp->nbp_state = NBST_CLOSED; 439 nbp->nbp_vc = vcp; 440 nbp->nbp_sndbuf = smb_tcpsndbuf; 441 nbp->nbp_rcvbuf = smb_tcprcvbuf; 442 vcp->vc_tdata = nbp; 443 return 0; 444 } 445 446 static int 447 smb_nbst_done(struct smb_vc *vcp, struct proc *p) 448 { 449 struct nbpcb *nbp = vcp->vc_tdata; 450 451 if (nbp == NULL) 452 return ENOTCONN; 453 smb_nbst_disconnect(vcp, p); 454 if (nbp->nbp_laddr) 455 free(nbp->nbp_laddr, M_SONAME); 456 if (nbp->nbp_paddr) 457 free(nbp->nbp_paddr, M_SONAME); 458 free(nbp, M_NBDATA); 459 return 0; 460 } 461 462 static int 463 smb_nbst_bind(struct smb_vc *vcp, struct sockaddr *sap, struct proc *p) 464 { 465 struct nbpcb *nbp = vcp->vc_tdata; 466 struct sockaddr_nb *snb; 467 int error, slen; 468 469 NBDEBUG("\n"); 470 error = EINVAL; 471 do { 472 if (nbp->nbp_flags & NBF_LOCADDR) 473 break; 474 /* 475 * It is possible to create NETBIOS name in the kernel, 476 * but nothing prevents us to do it in the user space. 477 */ 478 if (sap == NULL) 479 break; 480 slen = sap->sa_len; 481 if (slen < NB_MINSALEN) 482 break; 483 snb = (struct sockaddr_nb*)dup_sockaddr(sap, 1); 484 if (snb == NULL) { 485 error = ENOMEM; 486 break; 487 } 488 nbp->nbp_laddr = snb; 489 nbp->nbp_flags |= NBF_LOCADDR; 490 error = 0; 491 } while(0); 492 return error; 493 } 494 495 static int 496 smb_nbst_connect(struct smb_vc *vcp, struct sockaddr *sap, struct proc *p) 497 { 498 struct nbpcb *nbp = vcp->vc_tdata; 499 struct sockaddr_in sin; 500 struct sockaddr_nb *snb; 501 struct timespec ts1, ts2; 502 int error, slen; 503 504 NBDEBUG("\n"); 505 if (nbp->nbp_tso != NULL) 506 return EISCONN; 507 if (nbp->nbp_laddr == NULL) 508 return EINVAL; 509 slen = sap->sa_len; 510 if (slen < NB_MINSALEN) 511 return EINVAL; 512 if (nbp->nbp_paddr) { 513 free(nbp->nbp_paddr, M_SONAME); 514 nbp->nbp_paddr = NULL; 515 } 516 snb = (struct sockaddr_nb*)dup_sockaddr(sap, 1); 517 if (snb == NULL) 518 return ENOMEM; 519 nbp->nbp_paddr = snb; 520 sin = snb->snb_addrin; 521 getnanotime(&ts1); 522 error = nb_connect_in(nbp, &sin, p); 523 if (error) 524 return error; 525 getnanotime(&ts2); 526 timespecsub(&ts2, &ts1); 527 if (ts2.tv_sec == 0 && ts2.tv_sec == 0) 528 ts2.tv_sec = 1; 529 nbp->nbp_timo = ts2; 530 timespecadd(&nbp->nbp_timo, &ts2); 531 timespecadd(&nbp->nbp_timo, &ts2); 532 timespecadd(&nbp->nbp_timo, &ts2); /* * 4 */ 533 error = nbssn_rq_request(nbp, p); 534 if (error) 535 smb_nbst_disconnect(vcp, p); 536 return error; 537 } 538 539 static int 540 smb_nbst_disconnect(struct smb_vc *vcp, struct proc *p) 541 { 542 struct nbpcb *nbp = vcp->vc_tdata; 543 struct socket *so; 544 545 if (nbp == NULL || nbp->nbp_tso == NULL) 546 return ENOTCONN; 547 if ((so = nbp->nbp_tso) != NULL) { 548 nbp->nbp_flags &= ~NBF_CONNECTED; 549 nbp->nbp_tso = (struct socket *)NULL; 550 soshutdown(so, 2); 551 soclose(so); 552 } 553 if (nbp->nbp_state != NBST_RETARGET) { 554 nbp->nbp_state = NBST_CLOSED; 555 } 556 return 0; 557 } 558 559 static int 560 smb_nbst_send(struct smb_vc *vcp, struct mbuf *m0, struct proc *p) 561 { 562 struct nbpcb *nbp = vcp->vc_tdata; 563 int error; 564 565 if (nbp->nbp_state != NBST_SESSION) { 566 error = ENOTCONN; 567 goto abort; 568 } 569 M_PREPEND(m0, 4, M_WAITOK); 570 if (m0 == NULL) 571 return ENOBUFS; 572 nb_sethdr(m0, NB_SSN_MESSAGE, m_fixhdr(m0) - 4); 573 error = nb_sosend(nbp->nbp_tso, m0, 0, p); 574 return error; 575 abort: 576 if (m0) 577 m_freem(m0); 578 return error; 579 } 580 581 582 static int 583 smb_nbst_recv(struct smb_vc *vcp, struct mbuf **mpp, struct proc *p) 584 { 585 struct nbpcb *nbp = vcp->vc_tdata; 586 u_int8_t rpcode; 587 int error, rplen; 588 589 nbp->nbp_flags |= NBF_RECVLOCK; 590 error = nbssn_recv(nbp, mpp, &rplen, &rpcode, p); 591 nbp->nbp_flags &= ~NBF_RECVLOCK; 592 return error; 593 } 594 595 static void 596 smb_nbst_timo(struct smb_vc *vcp) 597 { 598 return; 599 } 600 601 static void 602 smb_nbst_intr(struct smb_vc *vcp) 603 { 604 struct nbpcb *nbp = vcp->vc_tdata; 605 606 if (nbp == NULL || nbp->nbp_tso == NULL) 607 return; 608 sorwakeup(nbp->nbp_tso); 609 sowwakeup(nbp->nbp_tso); 610 } 611 612 static int 613 smb_nbst_getparam(struct smb_vc *vcp, int param, void *data) 614 { 615 struct nbpcb *nbp = vcp->vc_tdata; 616 617 switch (param) { 618 case SMBTP_SNDSZ: 619 *(int*)data = nbp->nbp_sndbuf; 620 break; 621 case SMBTP_RCVSZ: 622 *(int*)data = nbp->nbp_rcvbuf; 623 break; 624 case SMBTP_TIMEOUT: 625 *(struct timespec*)data = nbp->nbp_timo; 626 break; 627 default: 628 return EINVAL; 629 } 630 return 0; 631 } 632 633 static int 634 smb_nbst_setparam(struct smb_vc *vcp, int param, void *data) 635 { 636 struct nbpcb *nbp = vcp->vc_tdata; 637 638 switch (param) { 639 case SMBTP_SELECTID: 640 nbp->nbp_selectid = data; 641 break; 642 default: 643 return EINVAL; 644 } 645 return 0; 646 } 647 648 /* 649 * Check for fatal errors 650 */ 651 static int 652 smb_nbst_fatal(struct smb_vc *vcp, int error) 653 { 654 switch (error) { 655 case ENOTCONN: 656 case ENETRESET: 657 case ECONNABORTED: 658 return 1; 659 } 660 return 0; 661 } 662 663 664 struct smb_tran_desc smb_tran_nbtcp_desc = { 665 SMBT_NBTCP, 666 smb_nbst_create, smb_nbst_done, 667 smb_nbst_bind, smb_nbst_connect, smb_nbst_disconnect, 668 smb_nbst_send, smb_nbst_recv, 669 smb_nbst_timo, smb_nbst_intr, 670 smb_nbst_getparam, smb_nbst_setparam, 671 smb_nbst_fatal 672 }; 673 674