1 /*- 2 * Copyright (C) 1997-2003 3 * Sony Computer Science Laboratories Inc. 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 * 14 * THIS SOFTWARE IS PROVIDED BY SONY CSL AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL SONY CSL OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $KAME: altq_subr.c,v 1.21 2003/11/06 06:32:53 kjc Exp $ 27 * $FreeBSD$ 28 */ 29 30 #include "opt_altq.h" 31 #include "opt_inet.h" 32 #include "opt_inet6.h" 33 34 #include <sys/param.h> 35 #include <sys/malloc.h> 36 #include <sys/mbuf.h> 37 #include <sys/systm.h> 38 #include <sys/proc.h> 39 #include <sys/socket.h> 40 #include <sys/socketvar.h> 41 #include <sys/kernel.h> 42 #include <sys/errno.h> 43 #include <sys/syslog.h> 44 #include <sys/sysctl.h> 45 #include <sys/queue.h> 46 47 #include <net/if.h> 48 #include <net/if_var.h> 49 #include <net/if_dl.h> 50 #include <net/if_types.h> 51 #include <net/vnet.h> 52 53 #include <netinet/in.h> 54 #include <netinet/in_systm.h> 55 #include <netinet/ip.h> 56 #ifdef INET6 57 #include <netinet/ip6.h> 58 #endif 59 #include <netinet/tcp.h> 60 #include <netinet/udp.h> 61 62 #include <netpfil/pf/pf.h> 63 #include <netpfil/pf/pf_altq.h> 64 #include <net/altq/altq.h> 65 #ifdef ALTQ3_COMPAT 66 #include <net/altq/altq_conf.h> 67 #endif 68 69 /* machine dependent clock related includes */ 70 #include <sys/bus.h> 71 #include <sys/cpu.h> 72 #include <sys/eventhandler.h> 73 #include <machine/clock.h> 74 #if defined(__amd64__) || defined(__i386__) 75 #include <machine/cpufunc.h> /* for pentium tsc */ 76 #include <machine/specialreg.h> /* for CPUID_TSC */ 77 #include <machine/md_var.h> /* for cpu_feature */ 78 #endif /* __amd64 || __i386__ */ 79 80 /* 81 * internal function prototypes 82 */ 83 static void tbr_timeout(void *); 84 int (*altq_input)(struct mbuf *, int) = NULL; 85 static struct mbuf *tbr_dequeue(struct ifaltq *, int); 86 static int tbr_timer = 0; /* token bucket regulator timer */ 87 #if !defined(__FreeBSD__) || (__FreeBSD_version < 600000) 88 static struct callout tbr_callout = CALLOUT_INITIALIZER; 89 #else 90 static struct callout tbr_callout; 91 #endif 92 93 #ifdef ALTQ3_CLFIER_COMPAT 94 static int extract_ports4(struct mbuf *, struct ip *, struct flowinfo_in *); 95 #ifdef INET6 96 static int extract_ports6(struct mbuf *, struct ip6_hdr *, 97 struct flowinfo_in6 *); 98 #endif 99 static int apply_filter4(u_int32_t, struct flow_filter *, 100 struct flowinfo_in *); 101 static int apply_ppfilter4(u_int32_t, struct flow_filter *, 102 struct flowinfo_in *); 103 #ifdef INET6 104 static int apply_filter6(u_int32_t, struct flow_filter6 *, 105 struct flowinfo_in6 *); 106 #endif 107 static int apply_tosfilter4(u_int32_t, struct flow_filter *, 108 struct flowinfo_in *); 109 static u_long get_filt_handle(struct acc_classifier *, int); 110 static struct acc_filter *filth_to_filtp(struct acc_classifier *, u_long); 111 static u_int32_t filt2fibmask(struct flow_filter *); 112 113 static void ip4f_cache(struct ip *, struct flowinfo_in *); 114 static int ip4f_lookup(struct ip *, struct flowinfo_in *); 115 static int ip4f_init(void); 116 static struct ip4_frag *ip4f_alloc(void); 117 static void ip4f_free(struct ip4_frag *); 118 #endif /* ALTQ3_CLFIER_COMPAT */ 119 120 /* 121 * alternate queueing support routines 122 */ 123 124 /* look up the queue state by the interface name and the queueing type. */ 125 void * 126 altq_lookup(name, type) 127 char *name; 128 int type; 129 { 130 struct ifnet *ifp; 131 132 if ((ifp = ifunit(name)) != NULL) { 133 /* read if_snd unlocked */ 134 if (type != ALTQT_NONE && ifp->if_snd.altq_type == type) 135 return (ifp->if_snd.altq_disc); 136 } 137 138 return NULL; 139 } 140 141 int 142 altq_attach(ifq, type, discipline, enqueue, dequeue, request, clfier, classify) 143 struct ifaltq *ifq; 144 int type; 145 void *discipline; 146 int (*enqueue)(struct ifaltq *, struct mbuf *, struct altq_pktattr *); 147 struct mbuf *(*dequeue)(struct ifaltq *, int); 148 int (*request)(struct ifaltq *, int, void *); 149 void *clfier; 150 void *(*classify)(void *, struct mbuf *, int); 151 { 152 IFQ_LOCK(ifq); 153 if (!ALTQ_IS_READY(ifq)) { 154 IFQ_UNLOCK(ifq); 155 return ENXIO; 156 } 157 158 #ifdef ALTQ3_COMPAT 159 /* 160 * pfaltq can override the existing discipline, but altq3 cannot. 161 * check these if clfier is not NULL (which implies altq3). 162 */ 163 if (clfier != NULL) { 164 if (ALTQ_IS_ENABLED(ifq)) { 165 IFQ_UNLOCK(ifq); 166 return EBUSY; 167 } 168 if (ALTQ_IS_ATTACHED(ifq)) { 169 IFQ_UNLOCK(ifq); 170 return EEXIST; 171 } 172 } 173 #endif 174 ifq->altq_type = type; 175 ifq->altq_disc = discipline; 176 ifq->altq_enqueue = enqueue; 177 ifq->altq_dequeue = dequeue; 178 ifq->altq_request = request; 179 ifq->altq_clfier = clfier; 180 ifq->altq_classify = classify; 181 ifq->altq_flags &= (ALTQF_CANTCHANGE|ALTQF_ENABLED); 182 #ifdef ALTQ3_COMPAT 183 #ifdef ALTQ_KLD 184 altq_module_incref(type); 185 #endif 186 #endif 187 IFQ_UNLOCK(ifq); 188 return 0; 189 } 190 191 int 192 altq_detach(ifq) 193 struct ifaltq *ifq; 194 { 195 IFQ_LOCK(ifq); 196 197 if (!ALTQ_IS_READY(ifq)) { 198 IFQ_UNLOCK(ifq); 199 return ENXIO; 200 } 201 if (ALTQ_IS_ENABLED(ifq)) { 202 IFQ_UNLOCK(ifq); 203 return EBUSY; 204 } 205 if (!ALTQ_IS_ATTACHED(ifq)) { 206 IFQ_UNLOCK(ifq); 207 return (0); 208 } 209 #ifdef ALTQ3_COMPAT 210 #ifdef ALTQ_KLD 211 altq_module_declref(ifq->altq_type); 212 #endif 213 #endif 214 215 ifq->altq_type = ALTQT_NONE; 216 ifq->altq_disc = NULL; 217 ifq->altq_enqueue = NULL; 218 ifq->altq_dequeue = NULL; 219 ifq->altq_request = NULL; 220 ifq->altq_clfier = NULL; 221 ifq->altq_classify = NULL; 222 ifq->altq_flags &= ALTQF_CANTCHANGE; 223 224 IFQ_UNLOCK(ifq); 225 return 0; 226 } 227 228 int 229 altq_enable(ifq) 230 struct ifaltq *ifq; 231 { 232 int s; 233 234 IFQ_LOCK(ifq); 235 236 if (!ALTQ_IS_READY(ifq)) { 237 IFQ_UNLOCK(ifq); 238 return ENXIO; 239 } 240 if (ALTQ_IS_ENABLED(ifq)) { 241 IFQ_UNLOCK(ifq); 242 return 0; 243 } 244 245 s = splnet(); 246 IFQ_PURGE_NOLOCK(ifq); 247 ASSERT(ifq->ifq_len == 0); 248 ifq->ifq_drv_maxlen = 0; /* disable bulk dequeue */ 249 ifq->altq_flags |= ALTQF_ENABLED; 250 if (ifq->altq_clfier != NULL) 251 ifq->altq_flags |= ALTQF_CLASSIFY; 252 splx(s); 253 254 IFQ_UNLOCK(ifq); 255 return 0; 256 } 257 258 int 259 altq_disable(ifq) 260 struct ifaltq *ifq; 261 { 262 int s; 263 264 IFQ_LOCK(ifq); 265 if (!ALTQ_IS_ENABLED(ifq)) { 266 IFQ_UNLOCK(ifq); 267 return 0; 268 } 269 270 s = splnet(); 271 IFQ_PURGE_NOLOCK(ifq); 272 ASSERT(ifq->ifq_len == 0); 273 ifq->altq_flags &= ~(ALTQF_ENABLED|ALTQF_CLASSIFY); 274 splx(s); 275 276 IFQ_UNLOCK(ifq); 277 return 0; 278 } 279 280 #ifdef ALTQ_DEBUG 281 void 282 altq_assert(file, line, failedexpr) 283 const char *file, *failedexpr; 284 int line; 285 { 286 (void)printf("altq assertion \"%s\" failed: file \"%s\", line %d\n", 287 failedexpr, file, line); 288 panic("altq assertion"); 289 /* NOTREACHED */ 290 } 291 #endif 292 293 /* 294 * internal representation of token bucket parameters 295 * rate: byte_per_unittime << 32 296 * (((bits_per_sec) / 8) << 32) / machclk_freq 297 * depth: byte << 32 298 * 299 */ 300 #define TBR_SHIFT 32 301 #define TBR_SCALE(x) ((int64_t)(x) << TBR_SHIFT) 302 #define TBR_UNSCALE(x) ((x) >> TBR_SHIFT) 303 304 static struct mbuf * 305 tbr_dequeue(ifq, op) 306 struct ifaltq *ifq; 307 int op; 308 { 309 struct tb_regulator *tbr; 310 struct mbuf *m; 311 int64_t interval; 312 u_int64_t now; 313 314 IFQ_LOCK_ASSERT(ifq); 315 tbr = ifq->altq_tbr; 316 if (op == ALTDQ_REMOVE && tbr->tbr_lastop == ALTDQ_POLL) { 317 /* if this is a remove after poll, bypass tbr check */ 318 } else { 319 /* update token only when it is negative */ 320 if (tbr->tbr_token <= 0) { 321 now = read_machclk(); 322 interval = now - tbr->tbr_last; 323 if (interval >= tbr->tbr_filluptime) 324 tbr->tbr_token = tbr->tbr_depth; 325 else { 326 tbr->tbr_token += interval * tbr->tbr_rate; 327 if (tbr->tbr_token > tbr->tbr_depth) 328 tbr->tbr_token = tbr->tbr_depth; 329 } 330 tbr->tbr_last = now; 331 } 332 /* if token is still negative, don't allow dequeue */ 333 if (tbr->tbr_token <= 0) 334 return (NULL); 335 } 336 337 if (ALTQ_IS_ENABLED(ifq)) 338 m = (*ifq->altq_dequeue)(ifq, op); 339 else { 340 if (op == ALTDQ_POLL) 341 _IF_POLL(ifq, m); 342 else 343 _IF_DEQUEUE(ifq, m); 344 } 345 346 if (m != NULL && op == ALTDQ_REMOVE) 347 tbr->tbr_token -= TBR_SCALE(m_pktlen(m)); 348 tbr->tbr_lastop = op; 349 return (m); 350 } 351 352 /* 353 * set a token bucket regulator. 354 * if the specified rate is zero, the token bucket regulator is deleted. 355 */ 356 int 357 tbr_set(ifq, profile) 358 struct ifaltq *ifq; 359 struct tb_profile *profile; 360 { 361 struct tb_regulator *tbr, *otbr; 362 363 if (tbr_dequeue_ptr == NULL) 364 tbr_dequeue_ptr = tbr_dequeue; 365 366 if (machclk_freq == 0) 367 init_machclk(); 368 if (machclk_freq == 0) { 369 printf("tbr_set: no cpu clock available!\n"); 370 return (ENXIO); 371 } 372 373 IFQ_LOCK(ifq); 374 if (profile->rate == 0) { 375 /* delete this tbr */ 376 if ((tbr = ifq->altq_tbr) == NULL) { 377 IFQ_UNLOCK(ifq); 378 return (ENOENT); 379 } 380 ifq->altq_tbr = NULL; 381 free(tbr, M_DEVBUF); 382 IFQ_UNLOCK(ifq); 383 return (0); 384 } 385 386 tbr = malloc(sizeof(struct tb_regulator), M_DEVBUF, M_NOWAIT | M_ZERO); 387 if (tbr == NULL) { 388 IFQ_UNLOCK(ifq); 389 return (ENOMEM); 390 } 391 392 tbr->tbr_rate = TBR_SCALE(profile->rate / 8) / machclk_freq; 393 tbr->tbr_depth = TBR_SCALE(profile->depth); 394 if (tbr->tbr_rate > 0) 395 tbr->tbr_filluptime = tbr->tbr_depth / tbr->tbr_rate; 396 else 397 tbr->tbr_filluptime = 0xffffffffffffffffLL; 398 tbr->tbr_token = tbr->tbr_depth; 399 tbr->tbr_last = read_machclk(); 400 tbr->tbr_lastop = ALTDQ_REMOVE; 401 402 otbr = ifq->altq_tbr; 403 ifq->altq_tbr = tbr; /* set the new tbr */ 404 405 if (otbr != NULL) 406 free(otbr, M_DEVBUF); 407 else { 408 if (tbr_timer == 0) { 409 CALLOUT_RESET(&tbr_callout, 1, tbr_timeout, (void *)0); 410 tbr_timer = 1; 411 } 412 } 413 IFQ_UNLOCK(ifq); 414 return (0); 415 } 416 417 /* 418 * tbr_timeout goes through the interface list, and kicks the drivers 419 * if necessary. 420 * 421 * MPSAFE 422 */ 423 static void 424 tbr_timeout(arg) 425 void *arg; 426 { 427 VNET_ITERATOR_DECL(vnet_iter); 428 struct ifnet *ifp; 429 int active, s; 430 431 active = 0; 432 s = splnet(); 433 IFNET_RLOCK_NOSLEEP(); 434 VNET_LIST_RLOCK_NOSLEEP(); 435 VNET_FOREACH(vnet_iter) { 436 CURVNET_SET(vnet_iter); 437 for (ifp = TAILQ_FIRST(&V_ifnet); ifp; 438 ifp = TAILQ_NEXT(ifp, if_list)) { 439 /* read from if_snd unlocked */ 440 if (!TBR_IS_ENABLED(&ifp->if_snd)) 441 continue; 442 active++; 443 if (!IFQ_IS_EMPTY(&ifp->if_snd) && 444 ifp->if_start != NULL) 445 (*ifp->if_start)(ifp); 446 } 447 CURVNET_RESTORE(); 448 } 449 VNET_LIST_RUNLOCK_NOSLEEP(); 450 IFNET_RUNLOCK_NOSLEEP(); 451 splx(s); 452 if (active > 0) 453 CALLOUT_RESET(&tbr_callout, 1, tbr_timeout, (void *)0); 454 else 455 tbr_timer = 0; /* don't need tbr_timer anymore */ 456 } 457 458 /* 459 * get token bucket regulator profile 460 */ 461 int 462 tbr_get(ifq, profile) 463 struct ifaltq *ifq; 464 struct tb_profile *profile; 465 { 466 struct tb_regulator *tbr; 467 468 IFQ_LOCK(ifq); 469 if ((tbr = ifq->altq_tbr) == NULL) { 470 profile->rate = 0; 471 profile->depth = 0; 472 } else { 473 profile->rate = 474 (u_int)TBR_UNSCALE(tbr->tbr_rate * 8 * machclk_freq); 475 profile->depth = (u_int)TBR_UNSCALE(tbr->tbr_depth); 476 } 477 IFQ_UNLOCK(ifq); 478 return (0); 479 } 480 481 /* 482 * attach a discipline to the interface. if one already exists, it is 483 * overridden. 484 * Locking is done in the discipline specific attach functions. Basically 485 * they call back to altq_attach which takes care of the attach and locking. 486 */ 487 int 488 altq_pfattach(struct pf_altq *a) 489 { 490 int error = 0; 491 492 switch (a->scheduler) { 493 case ALTQT_NONE: 494 break; 495 #ifdef ALTQ_CBQ 496 case ALTQT_CBQ: 497 error = cbq_pfattach(a); 498 break; 499 #endif 500 #ifdef ALTQ_PRIQ 501 case ALTQT_PRIQ: 502 error = priq_pfattach(a); 503 break; 504 #endif 505 #ifdef ALTQ_HFSC 506 case ALTQT_HFSC: 507 error = hfsc_pfattach(a); 508 break; 509 #endif 510 #ifdef ALTQ_FAIRQ 511 case ALTQT_FAIRQ: 512 error = fairq_pfattach(a); 513 break; 514 #endif 515 #ifdef ALTQ_CODEL 516 case ALTQT_CODEL: 517 error = codel_pfattach(a); 518 break; 519 #endif 520 default: 521 error = ENXIO; 522 } 523 524 return (error); 525 } 526 527 /* 528 * detach a discipline from the interface. 529 * it is possible that the discipline was already overridden by another 530 * discipline. 531 */ 532 int 533 altq_pfdetach(struct pf_altq *a) 534 { 535 struct ifnet *ifp; 536 int s, error = 0; 537 538 if ((ifp = ifunit(a->ifname)) == NULL) 539 return (EINVAL); 540 541 /* if this discipline is no longer referenced, just return */ 542 /* read unlocked from if_snd */ 543 if (a->altq_disc == NULL || a->altq_disc != ifp->if_snd.altq_disc) 544 return (0); 545 546 s = splnet(); 547 /* read unlocked from if_snd, _disable and _detach take care */ 548 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 549 error = altq_disable(&ifp->if_snd); 550 if (error == 0) 551 error = altq_detach(&ifp->if_snd); 552 splx(s); 553 554 return (error); 555 } 556 557 /* 558 * add a discipline or a queue 559 * Locking is done in the discipline specific functions with regards to 560 * malloc with WAITOK, also it is not yet clear which lock to use. 561 */ 562 int 563 altq_add(struct pf_altq *a) 564 { 565 int error = 0; 566 567 if (a->qname[0] != 0) 568 return (altq_add_queue(a)); 569 570 if (machclk_freq == 0) 571 init_machclk(); 572 if (machclk_freq == 0) 573 panic("altq_add: no cpu clock"); 574 575 switch (a->scheduler) { 576 #ifdef ALTQ_CBQ 577 case ALTQT_CBQ: 578 error = cbq_add_altq(a); 579 break; 580 #endif 581 #ifdef ALTQ_PRIQ 582 case ALTQT_PRIQ: 583 error = priq_add_altq(a); 584 break; 585 #endif 586 #ifdef ALTQ_HFSC 587 case ALTQT_HFSC: 588 error = hfsc_add_altq(a); 589 break; 590 #endif 591 #ifdef ALTQ_FAIRQ 592 case ALTQT_FAIRQ: 593 error = fairq_add_altq(a); 594 break; 595 #endif 596 #ifdef ALTQ_CODEL 597 case ALTQT_CODEL: 598 error = codel_add_altq(a); 599 break; 600 #endif 601 default: 602 error = ENXIO; 603 } 604 605 return (error); 606 } 607 608 /* 609 * remove a discipline or a queue 610 * It is yet unclear what lock to use to protect this operation, the 611 * discipline specific functions will determine and grab it 612 */ 613 int 614 altq_remove(struct pf_altq *a) 615 { 616 int error = 0; 617 618 if (a->qname[0] != 0) 619 return (altq_remove_queue(a)); 620 621 switch (a->scheduler) { 622 #ifdef ALTQ_CBQ 623 case ALTQT_CBQ: 624 error = cbq_remove_altq(a); 625 break; 626 #endif 627 #ifdef ALTQ_PRIQ 628 case ALTQT_PRIQ: 629 error = priq_remove_altq(a); 630 break; 631 #endif 632 #ifdef ALTQ_HFSC 633 case ALTQT_HFSC: 634 error = hfsc_remove_altq(a); 635 break; 636 #endif 637 #ifdef ALTQ_FAIRQ 638 case ALTQT_FAIRQ: 639 error = fairq_remove_altq(a); 640 break; 641 #endif 642 #ifdef ALTQ_CODEL 643 case ALTQT_CODEL: 644 error = codel_remove_altq(a); 645 break; 646 #endif 647 default: 648 error = ENXIO; 649 } 650 651 return (error); 652 } 653 654 /* 655 * add a queue to the discipline 656 * It is yet unclear what lock to use to protect this operation, the 657 * discipline specific functions will determine and grab it 658 */ 659 int 660 altq_add_queue(struct pf_altq *a) 661 { 662 int error = 0; 663 664 switch (a->scheduler) { 665 #ifdef ALTQ_CBQ 666 case ALTQT_CBQ: 667 error = cbq_add_queue(a); 668 break; 669 #endif 670 #ifdef ALTQ_PRIQ 671 case ALTQT_PRIQ: 672 error = priq_add_queue(a); 673 break; 674 #endif 675 #ifdef ALTQ_HFSC 676 case ALTQT_HFSC: 677 error = hfsc_add_queue(a); 678 break; 679 #endif 680 #ifdef ALTQ_FAIRQ 681 case ALTQT_FAIRQ: 682 error = fairq_add_queue(a); 683 break; 684 #endif 685 default: 686 error = ENXIO; 687 } 688 689 return (error); 690 } 691 692 /* 693 * remove a queue from the discipline 694 * It is yet unclear what lock to use to protect this operation, the 695 * discipline specific functions will determine and grab it 696 */ 697 int 698 altq_remove_queue(struct pf_altq *a) 699 { 700 int error = 0; 701 702 switch (a->scheduler) { 703 #ifdef ALTQ_CBQ 704 case ALTQT_CBQ: 705 error = cbq_remove_queue(a); 706 break; 707 #endif 708 #ifdef ALTQ_PRIQ 709 case ALTQT_PRIQ: 710 error = priq_remove_queue(a); 711 break; 712 #endif 713 #ifdef ALTQ_HFSC 714 case ALTQT_HFSC: 715 error = hfsc_remove_queue(a); 716 break; 717 #endif 718 #ifdef ALTQ_FAIRQ 719 case ALTQT_FAIRQ: 720 error = fairq_remove_queue(a); 721 break; 722 #endif 723 default: 724 error = ENXIO; 725 } 726 727 return (error); 728 } 729 730 /* 731 * get queue statistics 732 * Locking is done in the discipline specific functions with regards to 733 * copyout operations, also it is not yet clear which lock to use. 734 */ 735 int 736 altq_getqstats(struct pf_altq *a, void *ubuf, int *nbytes) 737 { 738 int error = 0; 739 740 switch (a->scheduler) { 741 #ifdef ALTQ_CBQ 742 case ALTQT_CBQ: 743 error = cbq_getqstats(a, ubuf, nbytes); 744 break; 745 #endif 746 #ifdef ALTQ_PRIQ 747 case ALTQT_PRIQ: 748 error = priq_getqstats(a, ubuf, nbytes); 749 break; 750 #endif 751 #ifdef ALTQ_HFSC 752 case ALTQT_HFSC: 753 error = hfsc_getqstats(a, ubuf, nbytes); 754 break; 755 #endif 756 #ifdef ALTQ_FAIRQ 757 case ALTQT_FAIRQ: 758 error = fairq_getqstats(a, ubuf, nbytes); 759 break; 760 #endif 761 #ifdef ALTQ_CODEL 762 case ALTQT_CODEL: 763 error = codel_getqstats(a, ubuf, nbytes); 764 break; 765 #endif 766 default: 767 error = ENXIO; 768 } 769 770 return (error); 771 } 772 773 /* 774 * read and write diffserv field in IPv4 or IPv6 header 775 */ 776 u_int8_t 777 read_dsfield(m, pktattr) 778 struct mbuf *m; 779 struct altq_pktattr *pktattr; 780 { 781 struct mbuf *m0; 782 u_int8_t ds_field = 0; 783 784 if (pktattr == NULL || 785 (pktattr->pattr_af != AF_INET && pktattr->pattr_af != AF_INET6)) 786 return ((u_int8_t)0); 787 788 /* verify that pattr_hdr is within the mbuf data */ 789 for (m0 = m; m0 != NULL; m0 = m0->m_next) 790 if ((pktattr->pattr_hdr >= m0->m_data) && 791 (pktattr->pattr_hdr < m0->m_data + m0->m_len)) 792 break; 793 if (m0 == NULL) { 794 /* ick, pattr_hdr is stale */ 795 pktattr->pattr_af = AF_UNSPEC; 796 #ifdef ALTQ_DEBUG 797 printf("read_dsfield: can't locate header!\n"); 798 #endif 799 return ((u_int8_t)0); 800 } 801 802 if (pktattr->pattr_af == AF_INET) { 803 struct ip *ip = (struct ip *)pktattr->pattr_hdr; 804 805 if (ip->ip_v != 4) 806 return ((u_int8_t)0); /* version mismatch! */ 807 ds_field = ip->ip_tos; 808 } 809 #ifdef INET6 810 else if (pktattr->pattr_af == AF_INET6) { 811 struct ip6_hdr *ip6 = (struct ip6_hdr *)pktattr->pattr_hdr; 812 u_int32_t flowlabel; 813 814 flowlabel = ntohl(ip6->ip6_flow); 815 if ((flowlabel >> 28) != 6) 816 return ((u_int8_t)0); /* version mismatch! */ 817 ds_field = (flowlabel >> 20) & 0xff; 818 } 819 #endif 820 return (ds_field); 821 } 822 823 void 824 write_dsfield(struct mbuf *m, struct altq_pktattr *pktattr, u_int8_t dsfield) 825 { 826 struct mbuf *m0; 827 828 if (pktattr == NULL || 829 (pktattr->pattr_af != AF_INET && pktattr->pattr_af != AF_INET6)) 830 return; 831 832 /* verify that pattr_hdr is within the mbuf data */ 833 for (m0 = m; m0 != NULL; m0 = m0->m_next) 834 if ((pktattr->pattr_hdr >= m0->m_data) && 835 (pktattr->pattr_hdr < m0->m_data + m0->m_len)) 836 break; 837 if (m0 == NULL) { 838 /* ick, pattr_hdr is stale */ 839 pktattr->pattr_af = AF_UNSPEC; 840 #ifdef ALTQ_DEBUG 841 printf("write_dsfield: can't locate header!\n"); 842 #endif 843 return; 844 } 845 846 if (pktattr->pattr_af == AF_INET) { 847 struct ip *ip = (struct ip *)pktattr->pattr_hdr; 848 u_int8_t old; 849 int32_t sum; 850 851 if (ip->ip_v != 4) 852 return; /* version mismatch! */ 853 old = ip->ip_tos; 854 dsfield |= old & 3; /* leave CU bits */ 855 if (old == dsfield) 856 return; 857 ip->ip_tos = dsfield; 858 /* 859 * update checksum (from RFC1624) 860 * HC' = ~(~HC + ~m + m') 861 */ 862 sum = ~ntohs(ip->ip_sum) & 0xffff; 863 sum += 0xff00 + (~old & 0xff) + dsfield; 864 sum = (sum >> 16) + (sum & 0xffff); 865 sum += (sum >> 16); /* add carry */ 866 867 ip->ip_sum = htons(~sum & 0xffff); 868 } 869 #ifdef INET6 870 else if (pktattr->pattr_af == AF_INET6) { 871 struct ip6_hdr *ip6 = (struct ip6_hdr *)pktattr->pattr_hdr; 872 u_int32_t flowlabel; 873 874 flowlabel = ntohl(ip6->ip6_flow); 875 if ((flowlabel >> 28) != 6) 876 return; /* version mismatch! */ 877 flowlabel = (flowlabel & 0xf03fffff) | (dsfield << 20); 878 ip6->ip6_flow = htonl(flowlabel); 879 } 880 #endif 881 return; 882 } 883 884 885 /* 886 * high resolution clock support taking advantage of a machine dependent 887 * high resolution time counter (e.g., timestamp counter of intel pentium). 888 * we assume 889 * - 64-bit-long monotonically-increasing counter 890 * - frequency range is 100M-4GHz (CPU speed) 891 */ 892 /* if pcc is not available or disabled, emulate 256MHz using microtime() */ 893 #define MACHCLK_SHIFT 8 894 895 int machclk_usepcc; 896 u_int32_t machclk_freq; 897 u_int32_t machclk_per_tick; 898 899 #if defined(__i386__) && defined(__NetBSD__) 900 extern u_int64_t cpu_tsc_freq; 901 #endif 902 903 #if (__FreeBSD_version >= 700035) 904 /* Update TSC freq with the value indicated by the caller. */ 905 static void 906 tsc_freq_changed(void *arg, const struct cf_level *level, int status) 907 { 908 /* If there was an error during the transition, don't do anything. */ 909 if (status != 0) 910 return; 911 912 #if (__FreeBSD_version >= 701102) && (defined(__amd64__) || defined(__i386__)) 913 /* If TSC is P-state invariant, don't do anything. */ 914 if (tsc_is_invariant) 915 return; 916 #endif 917 918 /* Total setting for this level gives the new frequency in MHz. */ 919 init_machclk(); 920 } 921 EVENTHANDLER_DEFINE(cpufreq_post_change, tsc_freq_changed, NULL, 922 EVENTHANDLER_PRI_LAST); 923 #endif /* __FreeBSD_version >= 700035 */ 924 925 static void 926 init_machclk_setup(void) 927 { 928 #if (__FreeBSD_version >= 600000) 929 callout_init(&tbr_callout, 0); 930 #endif 931 932 machclk_usepcc = 1; 933 934 #if (!defined(__amd64__) && !defined(__i386__)) || defined(ALTQ_NOPCC) 935 machclk_usepcc = 0; 936 #endif 937 #if defined(__FreeBSD__) && defined(SMP) 938 machclk_usepcc = 0; 939 #endif 940 #if defined(__NetBSD__) && defined(MULTIPROCESSOR) 941 machclk_usepcc = 0; 942 #endif 943 #if defined(__amd64__) || defined(__i386__) 944 /* check if TSC is available */ 945 if ((cpu_feature & CPUID_TSC) == 0 || 946 atomic_load_acq_64(&tsc_freq) == 0) 947 machclk_usepcc = 0; 948 #endif 949 } 950 951 void 952 init_machclk(void) 953 { 954 static int called; 955 956 /* Call one-time initialization function. */ 957 if (!called) { 958 init_machclk_setup(); 959 called = 1; 960 } 961 962 if (machclk_usepcc == 0) { 963 /* emulate 256MHz using microtime() */ 964 machclk_freq = 1000000 << MACHCLK_SHIFT; 965 machclk_per_tick = machclk_freq / hz; 966 #ifdef ALTQ_DEBUG 967 printf("altq: emulate %uHz cpu clock\n", machclk_freq); 968 #endif 969 return; 970 } 971 972 /* 973 * if the clock frequency (of Pentium TSC or Alpha PCC) is 974 * accessible, just use it. 975 */ 976 #if defined(__amd64__) || defined(__i386__) 977 machclk_freq = atomic_load_acq_64(&tsc_freq); 978 #endif 979 980 /* 981 * if we don't know the clock frequency, measure it. 982 */ 983 if (machclk_freq == 0) { 984 static int wait; 985 struct timeval tv_start, tv_end; 986 u_int64_t start, end, diff; 987 int timo; 988 989 microtime(&tv_start); 990 start = read_machclk(); 991 timo = hz; /* 1 sec */ 992 (void)tsleep(&wait, PWAIT | PCATCH, "init_machclk", timo); 993 microtime(&tv_end); 994 end = read_machclk(); 995 diff = (u_int64_t)(tv_end.tv_sec - tv_start.tv_sec) * 1000000 996 + tv_end.tv_usec - tv_start.tv_usec; 997 if (diff != 0) 998 machclk_freq = (u_int)((end - start) * 1000000 / diff); 999 } 1000 1001 machclk_per_tick = machclk_freq / hz; 1002 1003 #ifdef ALTQ_DEBUG 1004 printf("altq: CPU clock: %uHz\n", machclk_freq); 1005 #endif 1006 } 1007 1008 #if defined(__OpenBSD__) && defined(__i386__) 1009 static __inline u_int64_t 1010 rdtsc(void) 1011 { 1012 u_int64_t rv; 1013 __asm __volatile(".byte 0x0f, 0x31" : "=A" (rv)); 1014 return (rv); 1015 } 1016 #endif /* __OpenBSD__ && __i386__ */ 1017 1018 u_int64_t 1019 read_machclk(void) 1020 { 1021 u_int64_t val; 1022 1023 if (machclk_usepcc) { 1024 #if defined(__amd64__) || defined(__i386__) 1025 val = rdtsc(); 1026 #else 1027 panic("read_machclk"); 1028 #endif 1029 } else { 1030 struct timeval tv; 1031 1032 microtime(&tv); 1033 val = (((u_int64_t)(tv.tv_sec - boottime.tv_sec) * 1000000 1034 + tv.tv_usec) << MACHCLK_SHIFT); 1035 } 1036 return (val); 1037 } 1038 1039 #ifdef ALTQ3_CLFIER_COMPAT 1040 1041 #ifndef IPPROTO_ESP 1042 #define IPPROTO_ESP 50 /* encapsulating security payload */ 1043 #endif 1044 #ifndef IPPROTO_AH 1045 #define IPPROTO_AH 51 /* authentication header */ 1046 #endif 1047 1048 /* 1049 * extract flow information from a given packet. 1050 * filt_mask shows flowinfo fields required. 1051 * we assume the ip header is in one mbuf, and addresses and ports are 1052 * in network byte order. 1053 */ 1054 int 1055 altq_extractflow(m, af, flow, filt_bmask) 1056 struct mbuf *m; 1057 int af; 1058 struct flowinfo *flow; 1059 u_int32_t filt_bmask; 1060 { 1061 1062 switch (af) { 1063 case PF_INET: { 1064 struct flowinfo_in *fin; 1065 struct ip *ip; 1066 1067 ip = mtod(m, struct ip *); 1068 1069 if (ip->ip_v != 4) 1070 break; 1071 1072 fin = (struct flowinfo_in *)flow; 1073 fin->fi_len = sizeof(struct flowinfo_in); 1074 fin->fi_family = AF_INET; 1075 1076 fin->fi_proto = ip->ip_p; 1077 fin->fi_tos = ip->ip_tos; 1078 1079 fin->fi_src.s_addr = ip->ip_src.s_addr; 1080 fin->fi_dst.s_addr = ip->ip_dst.s_addr; 1081 1082 if (filt_bmask & FIMB4_PORTS) 1083 /* if port info is required, extract port numbers */ 1084 extract_ports4(m, ip, fin); 1085 else { 1086 fin->fi_sport = 0; 1087 fin->fi_dport = 0; 1088 fin->fi_gpi = 0; 1089 } 1090 return (1); 1091 } 1092 1093 #ifdef INET6 1094 case PF_INET6: { 1095 struct flowinfo_in6 *fin6; 1096 struct ip6_hdr *ip6; 1097 1098 ip6 = mtod(m, struct ip6_hdr *); 1099 /* should we check the ip version? */ 1100 1101 fin6 = (struct flowinfo_in6 *)flow; 1102 fin6->fi6_len = sizeof(struct flowinfo_in6); 1103 fin6->fi6_family = AF_INET6; 1104 1105 fin6->fi6_proto = ip6->ip6_nxt; 1106 fin6->fi6_tclass = (ntohl(ip6->ip6_flow) >> 20) & 0xff; 1107 1108 fin6->fi6_flowlabel = ip6->ip6_flow & htonl(0x000fffff); 1109 fin6->fi6_src = ip6->ip6_src; 1110 fin6->fi6_dst = ip6->ip6_dst; 1111 1112 if ((filt_bmask & FIMB6_PORTS) || 1113 ((filt_bmask & FIMB6_PROTO) 1114 && ip6->ip6_nxt > IPPROTO_IPV6)) 1115 /* 1116 * if port info is required, or proto is required 1117 * but there are option headers, extract port 1118 * and protocol numbers. 1119 */ 1120 extract_ports6(m, ip6, fin6); 1121 else { 1122 fin6->fi6_sport = 0; 1123 fin6->fi6_dport = 0; 1124 fin6->fi6_gpi = 0; 1125 } 1126 return (1); 1127 } 1128 #endif /* INET6 */ 1129 1130 default: 1131 break; 1132 } 1133 1134 /* failed */ 1135 flow->fi_len = sizeof(struct flowinfo); 1136 flow->fi_family = AF_UNSPEC; 1137 return (0); 1138 } 1139 1140 /* 1141 * helper routine to extract port numbers 1142 */ 1143 /* structure for ipsec and ipv6 option header template */ 1144 struct _opt6 { 1145 u_int8_t opt6_nxt; /* next header */ 1146 u_int8_t opt6_hlen; /* header extension length */ 1147 u_int16_t _pad; 1148 u_int32_t ah_spi; /* security parameter index 1149 for authentication header */ 1150 }; 1151 1152 /* 1153 * extract port numbers from a ipv4 packet. 1154 */ 1155 static int 1156 extract_ports4(m, ip, fin) 1157 struct mbuf *m; 1158 struct ip *ip; 1159 struct flowinfo_in *fin; 1160 { 1161 struct mbuf *m0; 1162 u_short ip_off; 1163 u_int8_t proto; 1164 int off; 1165 1166 fin->fi_sport = 0; 1167 fin->fi_dport = 0; 1168 fin->fi_gpi = 0; 1169 1170 ip_off = ntohs(ip->ip_off); 1171 /* if it is a fragment, try cached fragment info */ 1172 if (ip_off & IP_OFFMASK) { 1173 ip4f_lookup(ip, fin); 1174 return (1); 1175 } 1176 1177 /* locate the mbuf containing the protocol header */ 1178 for (m0 = m; m0 != NULL; m0 = m0->m_next) 1179 if (((caddr_t)ip >= m0->m_data) && 1180 ((caddr_t)ip < m0->m_data + m0->m_len)) 1181 break; 1182 if (m0 == NULL) { 1183 #ifdef ALTQ_DEBUG 1184 printf("extract_ports4: can't locate header! ip=%p\n", ip); 1185 #endif 1186 return (0); 1187 } 1188 off = ((caddr_t)ip - m0->m_data) + (ip->ip_hl << 2); 1189 proto = ip->ip_p; 1190 1191 #ifdef ALTQ_IPSEC 1192 again: 1193 #endif 1194 while (off >= m0->m_len) { 1195 off -= m0->m_len; 1196 m0 = m0->m_next; 1197 if (m0 == NULL) 1198 return (0); /* bogus ip_hl! */ 1199 } 1200 if (m0->m_len < off + 4) 1201 return (0); 1202 1203 switch (proto) { 1204 case IPPROTO_TCP: 1205 case IPPROTO_UDP: { 1206 struct udphdr *udp; 1207 1208 udp = (struct udphdr *)(mtod(m0, caddr_t) + off); 1209 fin->fi_sport = udp->uh_sport; 1210 fin->fi_dport = udp->uh_dport; 1211 fin->fi_proto = proto; 1212 } 1213 break; 1214 1215 #ifdef ALTQ_IPSEC 1216 case IPPROTO_ESP: 1217 if (fin->fi_gpi == 0){ 1218 u_int32_t *gpi; 1219 1220 gpi = (u_int32_t *)(mtod(m0, caddr_t) + off); 1221 fin->fi_gpi = *gpi; 1222 } 1223 fin->fi_proto = proto; 1224 break; 1225 1226 case IPPROTO_AH: { 1227 /* get next header and header length */ 1228 struct _opt6 *opt6; 1229 1230 opt6 = (struct _opt6 *)(mtod(m0, caddr_t) + off); 1231 proto = opt6->opt6_nxt; 1232 off += 8 + (opt6->opt6_hlen * 4); 1233 if (fin->fi_gpi == 0 && m0->m_len >= off + 8) 1234 fin->fi_gpi = opt6->ah_spi; 1235 } 1236 /* goto the next header */ 1237 goto again; 1238 #endif /* ALTQ_IPSEC */ 1239 1240 default: 1241 fin->fi_proto = proto; 1242 return (0); 1243 } 1244 1245 /* if this is a first fragment, cache it. */ 1246 if (ip_off & IP_MF) 1247 ip4f_cache(ip, fin); 1248 1249 return (1); 1250 } 1251 1252 #ifdef INET6 1253 static int 1254 extract_ports6(m, ip6, fin6) 1255 struct mbuf *m; 1256 struct ip6_hdr *ip6; 1257 struct flowinfo_in6 *fin6; 1258 { 1259 struct mbuf *m0; 1260 int off; 1261 u_int8_t proto; 1262 1263 fin6->fi6_gpi = 0; 1264 fin6->fi6_sport = 0; 1265 fin6->fi6_dport = 0; 1266 1267 /* locate the mbuf containing the protocol header */ 1268 for (m0 = m; m0 != NULL; m0 = m0->m_next) 1269 if (((caddr_t)ip6 >= m0->m_data) && 1270 ((caddr_t)ip6 < m0->m_data + m0->m_len)) 1271 break; 1272 if (m0 == NULL) { 1273 #ifdef ALTQ_DEBUG 1274 printf("extract_ports6: can't locate header! ip6=%p\n", ip6); 1275 #endif 1276 return (0); 1277 } 1278 off = ((caddr_t)ip6 - m0->m_data) + sizeof(struct ip6_hdr); 1279 1280 proto = ip6->ip6_nxt; 1281 do { 1282 while (off >= m0->m_len) { 1283 off -= m0->m_len; 1284 m0 = m0->m_next; 1285 if (m0 == NULL) 1286 return (0); 1287 } 1288 if (m0->m_len < off + 4) 1289 return (0); 1290 1291 switch (proto) { 1292 case IPPROTO_TCP: 1293 case IPPROTO_UDP: { 1294 struct udphdr *udp; 1295 1296 udp = (struct udphdr *)(mtod(m0, caddr_t) + off); 1297 fin6->fi6_sport = udp->uh_sport; 1298 fin6->fi6_dport = udp->uh_dport; 1299 fin6->fi6_proto = proto; 1300 } 1301 return (1); 1302 1303 case IPPROTO_ESP: 1304 if (fin6->fi6_gpi == 0) { 1305 u_int32_t *gpi; 1306 1307 gpi = (u_int32_t *)(mtod(m0, caddr_t) + off); 1308 fin6->fi6_gpi = *gpi; 1309 } 1310 fin6->fi6_proto = proto; 1311 return (1); 1312 1313 case IPPROTO_AH: { 1314 /* get next header and header length */ 1315 struct _opt6 *opt6; 1316 1317 opt6 = (struct _opt6 *)(mtod(m0, caddr_t) + off); 1318 if (fin6->fi6_gpi == 0 && m0->m_len >= off + 8) 1319 fin6->fi6_gpi = opt6->ah_spi; 1320 proto = opt6->opt6_nxt; 1321 off += 8 + (opt6->opt6_hlen * 4); 1322 /* goto the next header */ 1323 break; 1324 } 1325 1326 case IPPROTO_HOPOPTS: 1327 case IPPROTO_ROUTING: 1328 case IPPROTO_DSTOPTS: { 1329 /* get next header and header length */ 1330 struct _opt6 *opt6; 1331 1332 opt6 = (struct _opt6 *)(mtod(m0, caddr_t) + off); 1333 proto = opt6->opt6_nxt; 1334 off += (opt6->opt6_hlen + 1) * 8; 1335 /* goto the next header */ 1336 break; 1337 } 1338 1339 case IPPROTO_FRAGMENT: 1340 /* ipv6 fragmentations are not supported yet */ 1341 default: 1342 fin6->fi6_proto = proto; 1343 return (0); 1344 } 1345 } while (1); 1346 /*NOTREACHED*/ 1347 } 1348 #endif /* INET6 */ 1349 1350 /* 1351 * altq common classifier 1352 */ 1353 int 1354 acc_add_filter(classifier, filter, class, phandle) 1355 struct acc_classifier *classifier; 1356 struct flow_filter *filter; 1357 void *class; 1358 u_long *phandle; 1359 { 1360 struct acc_filter *afp, *prev, *tmp; 1361 int i, s; 1362 1363 #ifdef INET6 1364 if (filter->ff_flow.fi_family != AF_INET && 1365 filter->ff_flow.fi_family != AF_INET6) 1366 return (EINVAL); 1367 #else 1368 if (filter->ff_flow.fi_family != AF_INET) 1369 return (EINVAL); 1370 #endif 1371 1372 afp = malloc(sizeof(struct acc_filter), 1373 M_DEVBUF, M_WAITOK); 1374 if (afp == NULL) 1375 return (ENOMEM); 1376 bzero(afp, sizeof(struct acc_filter)); 1377 1378 afp->f_filter = *filter; 1379 afp->f_class = class; 1380 1381 i = ACC_WILDCARD_INDEX; 1382 if (filter->ff_flow.fi_family == AF_INET) { 1383 struct flow_filter *filter4 = &afp->f_filter; 1384 1385 /* 1386 * if address is 0, it's a wildcard. if address mask 1387 * isn't set, use full mask. 1388 */ 1389 if (filter4->ff_flow.fi_dst.s_addr == 0) 1390 filter4->ff_mask.mask_dst.s_addr = 0; 1391 else if (filter4->ff_mask.mask_dst.s_addr == 0) 1392 filter4->ff_mask.mask_dst.s_addr = 0xffffffff; 1393 if (filter4->ff_flow.fi_src.s_addr == 0) 1394 filter4->ff_mask.mask_src.s_addr = 0; 1395 else if (filter4->ff_mask.mask_src.s_addr == 0) 1396 filter4->ff_mask.mask_src.s_addr = 0xffffffff; 1397 1398 /* clear extra bits in addresses */ 1399 filter4->ff_flow.fi_dst.s_addr &= 1400 filter4->ff_mask.mask_dst.s_addr; 1401 filter4->ff_flow.fi_src.s_addr &= 1402 filter4->ff_mask.mask_src.s_addr; 1403 1404 /* 1405 * if dst address is a wildcard, use hash-entry 1406 * ACC_WILDCARD_INDEX. 1407 */ 1408 if (filter4->ff_mask.mask_dst.s_addr != 0xffffffff) 1409 i = ACC_WILDCARD_INDEX; 1410 else 1411 i = ACC_GET_HASH_INDEX(filter4->ff_flow.fi_dst.s_addr); 1412 } 1413 #ifdef INET6 1414 else if (filter->ff_flow.fi_family == AF_INET6) { 1415 struct flow_filter6 *filter6 = 1416 (struct flow_filter6 *)&afp->f_filter; 1417 #ifndef IN6MASK0 /* taken from kame ipv6 */ 1418 #define IN6MASK0 {{{ 0, 0, 0, 0 }}} 1419 #define IN6MASK128 {{{ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff }}} 1420 const struct in6_addr in6mask0 = IN6MASK0; 1421 const struct in6_addr in6mask128 = IN6MASK128; 1422 #endif 1423 1424 if (IN6_IS_ADDR_UNSPECIFIED(&filter6->ff_flow6.fi6_dst)) 1425 filter6->ff_mask6.mask6_dst = in6mask0; 1426 else if (IN6_IS_ADDR_UNSPECIFIED(&filter6->ff_mask6.mask6_dst)) 1427 filter6->ff_mask6.mask6_dst = in6mask128; 1428 if (IN6_IS_ADDR_UNSPECIFIED(&filter6->ff_flow6.fi6_src)) 1429 filter6->ff_mask6.mask6_src = in6mask0; 1430 else if (IN6_IS_ADDR_UNSPECIFIED(&filter6->ff_mask6.mask6_src)) 1431 filter6->ff_mask6.mask6_src = in6mask128; 1432 1433 /* clear extra bits in addresses */ 1434 for (i = 0; i < 16; i++) 1435 filter6->ff_flow6.fi6_dst.s6_addr[i] &= 1436 filter6->ff_mask6.mask6_dst.s6_addr[i]; 1437 for (i = 0; i < 16; i++) 1438 filter6->ff_flow6.fi6_src.s6_addr[i] &= 1439 filter6->ff_mask6.mask6_src.s6_addr[i]; 1440 1441 if (filter6->ff_flow6.fi6_flowlabel == 0) 1442 i = ACC_WILDCARD_INDEX; 1443 else 1444 i = ACC_GET_HASH_INDEX(filter6->ff_flow6.fi6_flowlabel); 1445 } 1446 #endif /* INET6 */ 1447 1448 afp->f_handle = get_filt_handle(classifier, i); 1449 1450 /* update filter bitmask */ 1451 afp->f_fbmask = filt2fibmask(filter); 1452 classifier->acc_fbmask |= afp->f_fbmask; 1453 1454 /* 1455 * add this filter to the filter list. 1456 * filters are ordered from the highest rule number. 1457 */ 1458 s = splnet(); 1459 prev = NULL; 1460 LIST_FOREACH(tmp, &classifier->acc_filters[i], f_chain) { 1461 if (tmp->f_filter.ff_ruleno > afp->f_filter.ff_ruleno) 1462 prev = tmp; 1463 else 1464 break; 1465 } 1466 if (prev == NULL) 1467 LIST_INSERT_HEAD(&classifier->acc_filters[i], afp, f_chain); 1468 else 1469 LIST_INSERT_AFTER(prev, afp, f_chain); 1470 splx(s); 1471 1472 *phandle = afp->f_handle; 1473 return (0); 1474 } 1475 1476 int 1477 acc_delete_filter(classifier, handle) 1478 struct acc_classifier *classifier; 1479 u_long handle; 1480 { 1481 struct acc_filter *afp; 1482 int s; 1483 1484 if ((afp = filth_to_filtp(classifier, handle)) == NULL) 1485 return (EINVAL); 1486 1487 s = splnet(); 1488 LIST_REMOVE(afp, f_chain); 1489 splx(s); 1490 1491 free(afp, M_DEVBUF); 1492 1493 /* todo: update filt_bmask */ 1494 1495 return (0); 1496 } 1497 1498 /* 1499 * delete filters referencing to the specified class. 1500 * if the all flag is not 0, delete all the filters. 1501 */ 1502 int 1503 acc_discard_filters(classifier, class, all) 1504 struct acc_classifier *classifier; 1505 void *class; 1506 int all; 1507 { 1508 struct acc_filter *afp; 1509 int i, s; 1510 1511 s = splnet(); 1512 for (i = 0; i < ACC_FILTER_TABLESIZE; i++) { 1513 do { 1514 LIST_FOREACH(afp, &classifier->acc_filters[i], f_chain) 1515 if (all || afp->f_class == class) { 1516 LIST_REMOVE(afp, f_chain); 1517 free(afp, M_DEVBUF); 1518 /* start again from the head */ 1519 break; 1520 } 1521 } while (afp != NULL); 1522 } 1523 splx(s); 1524 1525 if (all) 1526 classifier->acc_fbmask = 0; 1527 1528 return (0); 1529 } 1530 1531 void * 1532 acc_classify(clfier, m, af) 1533 void *clfier; 1534 struct mbuf *m; 1535 int af; 1536 { 1537 struct acc_classifier *classifier; 1538 struct flowinfo flow; 1539 struct acc_filter *afp; 1540 int i; 1541 1542 classifier = (struct acc_classifier *)clfier; 1543 altq_extractflow(m, af, &flow, classifier->acc_fbmask); 1544 1545 if (flow.fi_family == AF_INET) { 1546 struct flowinfo_in *fp = (struct flowinfo_in *)&flow; 1547 1548 if ((classifier->acc_fbmask & FIMB4_ALL) == FIMB4_TOS) { 1549 /* only tos is used */ 1550 LIST_FOREACH(afp, 1551 &classifier->acc_filters[ACC_WILDCARD_INDEX], 1552 f_chain) 1553 if (apply_tosfilter4(afp->f_fbmask, 1554 &afp->f_filter, fp)) 1555 /* filter matched */ 1556 return (afp->f_class); 1557 } else if ((classifier->acc_fbmask & 1558 (~(FIMB4_PROTO|FIMB4_SPORT|FIMB4_DPORT) & FIMB4_ALL)) 1559 == 0) { 1560 /* only proto and ports are used */ 1561 LIST_FOREACH(afp, 1562 &classifier->acc_filters[ACC_WILDCARD_INDEX], 1563 f_chain) 1564 if (apply_ppfilter4(afp->f_fbmask, 1565 &afp->f_filter, fp)) 1566 /* filter matched */ 1567 return (afp->f_class); 1568 } else { 1569 /* get the filter hash entry from its dest address */ 1570 i = ACC_GET_HASH_INDEX(fp->fi_dst.s_addr); 1571 do { 1572 /* 1573 * go through this loop twice. first for dst 1574 * hash, second for wildcards. 1575 */ 1576 LIST_FOREACH(afp, &classifier->acc_filters[i], 1577 f_chain) 1578 if (apply_filter4(afp->f_fbmask, 1579 &afp->f_filter, fp)) 1580 /* filter matched */ 1581 return (afp->f_class); 1582 1583 /* 1584 * check again for filters with a dst addr 1585 * wildcard. 1586 * (daddr == 0 || dmask != 0xffffffff). 1587 */ 1588 if (i != ACC_WILDCARD_INDEX) 1589 i = ACC_WILDCARD_INDEX; 1590 else 1591 break; 1592 } while (1); 1593 } 1594 } 1595 #ifdef INET6 1596 else if (flow.fi_family == AF_INET6) { 1597 struct flowinfo_in6 *fp6 = (struct flowinfo_in6 *)&flow; 1598 1599 /* get the filter hash entry from its flow ID */ 1600 if (fp6->fi6_flowlabel != 0) 1601 i = ACC_GET_HASH_INDEX(fp6->fi6_flowlabel); 1602 else 1603 /* flowlable can be zero */ 1604 i = ACC_WILDCARD_INDEX; 1605 1606 /* go through this loop twice. first for flow hash, second 1607 for wildcards. */ 1608 do { 1609 LIST_FOREACH(afp, &classifier->acc_filters[i], f_chain) 1610 if (apply_filter6(afp->f_fbmask, 1611 (struct flow_filter6 *)&afp->f_filter, 1612 fp6)) 1613 /* filter matched */ 1614 return (afp->f_class); 1615 1616 /* 1617 * check again for filters with a wildcard. 1618 */ 1619 if (i != ACC_WILDCARD_INDEX) 1620 i = ACC_WILDCARD_INDEX; 1621 else 1622 break; 1623 } while (1); 1624 } 1625 #endif /* INET6 */ 1626 1627 /* no filter matched */ 1628 return (NULL); 1629 } 1630 1631 static int 1632 apply_filter4(fbmask, filt, pkt) 1633 u_int32_t fbmask; 1634 struct flow_filter *filt; 1635 struct flowinfo_in *pkt; 1636 { 1637 if (filt->ff_flow.fi_family != AF_INET) 1638 return (0); 1639 if ((fbmask & FIMB4_SPORT) && filt->ff_flow.fi_sport != pkt->fi_sport) 1640 return (0); 1641 if ((fbmask & FIMB4_DPORT) && filt->ff_flow.fi_dport != pkt->fi_dport) 1642 return (0); 1643 if ((fbmask & FIMB4_DADDR) && 1644 filt->ff_flow.fi_dst.s_addr != 1645 (pkt->fi_dst.s_addr & filt->ff_mask.mask_dst.s_addr)) 1646 return (0); 1647 if ((fbmask & FIMB4_SADDR) && 1648 filt->ff_flow.fi_src.s_addr != 1649 (pkt->fi_src.s_addr & filt->ff_mask.mask_src.s_addr)) 1650 return (0); 1651 if ((fbmask & FIMB4_PROTO) && filt->ff_flow.fi_proto != pkt->fi_proto) 1652 return (0); 1653 if ((fbmask & FIMB4_TOS) && filt->ff_flow.fi_tos != 1654 (pkt->fi_tos & filt->ff_mask.mask_tos)) 1655 return (0); 1656 if ((fbmask & FIMB4_GPI) && filt->ff_flow.fi_gpi != (pkt->fi_gpi)) 1657 return (0); 1658 /* match */ 1659 return (1); 1660 } 1661 1662 /* 1663 * filter matching function optimized for a common case that checks 1664 * only protocol and port numbers 1665 */ 1666 static int 1667 apply_ppfilter4(fbmask, filt, pkt) 1668 u_int32_t fbmask; 1669 struct flow_filter *filt; 1670 struct flowinfo_in *pkt; 1671 { 1672 if (filt->ff_flow.fi_family != AF_INET) 1673 return (0); 1674 if ((fbmask & FIMB4_SPORT) && filt->ff_flow.fi_sport != pkt->fi_sport) 1675 return (0); 1676 if ((fbmask & FIMB4_DPORT) && filt->ff_flow.fi_dport != pkt->fi_dport) 1677 return (0); 1678 if ((fbmask & FIMB4_PROTO) && filt->ff_flow.fi_proto != pkt->fi_proto) 1679 return (0); 1680 /* match */ 1681 return (1); 1682 } 1683 1684 /* 1685 * filter matching function only for tos field. 1686 */ 1687 static int 1688 apply_tosfilter4(fbmask, filt, pkt) 1689 u_int32_t fbmask; 1690 struct flow_filter *filt; 1691 struct flowinfo_in *pkt; 1692 { 1693 if (filt->ff_flow.fi_family != AF_INET) 1694 return (0); 1695 if ((fbmask & FIMB4_TOS) && filt->ff_flow.fi_tos != 1696 (pkt->fi_tos & filt->ff_mask.mask_tos)) 1697 return (0); 1698 /* match */ 1699 return (1); 1700 } 1701 1702 #ifdef INET6 1703 static int 1704 apply_filter6(fbmask, filt, pkt) 1705 u_int32_t fbmask; 1706 struct flow_filter6 *filt; 1707 struct flowinfo_in6 *pkt; 1708 { 1709 int i; 1710 1711 if (filt->ff_flow6.fi6_family != AF_INET6) 1712 return (0); 1713 if ((fbmask & FIMB6_FLABEL) && 1714 filt->ff_flow6.fi6_flowlabel != pkt->fi6_flowlabel) 1715 return (0); 1716 if ((fbmask & FIMB6_PROTO) && 1717 filt->ff_flow6.fi6_proto != pkt->fi6_proto) 1718 return (0); 1719 if ((fbmask & FIMB6_SPORT) && 1720 filt->ff_flow6.fi6_sport != pkt->fi6_sport) 1721 return (0); 1722 if ((fbmask & FIMB6_DPORT) && 1723 filt->ff_flow6.fi6_dport != pkt->fi6_dport) 1724 return (0); 1725 if (fbmask & FIMB6_SADDR) { 1726 for (i = 0; i < 4; i++) 1727 if (filt->ff_flow6.fi6_src.s6_addr32[i] != 1728 (pkt->fi6_src.s6_addr32[i] & 1729 filt->ff_mask6.mask6_src.s6_addr32[i])) 1730 return (0); 1731 } 1732 if (fbmask & FIMB6_DADDR) { 1733 for (i = 0; i < 4; i++) 1734 if (filt->ff_flow6.fi6_dst.s6_addr32[i] != 1735 (pkt->fi6_dst.s6_addr32[i] & 1736 filt->ff_mask6.mask6_dst.s6_addr32[i])) 1737 return (0); 1738 } 1739 if ((fbmask & FIMB6_TCLASS) && 1740 filt->ff_flow6.fi6_tclass != 1741 (pkt->fi6_tclass & filt->ff_mask6.mask6_tclass)) 1742 return (0); 1743 if ((fbmask & FIMB6_GPI) && 1744 filt->ff_flow6.fi6_gpi != pkt->fi6_gpi) 1745 return (0); 1746 /* match */ 1747 return (1); 1748 } 1749 #endif /* INET6 */ 1750 1751 /* 1752 * filter handle: 1753 * bit 20-28: index to the filter hash table 1754 * bit 0-19: unique id in the hash bucket. 1755 */ 1756 static u_long 1757 get_filt_handle(classifier, i) 1758 struct acc_classifier *classifier; 1759 int i; 1760 { 1761 static u_long handle_number = 1; 1762 u_long handle; 1763 struct acc_filter *afp; 1764 1765 while (1) { 1766 handle = handle_number++ & 0x000fffff; 1767 1768 if (LIST_EMPTY(&classifier->acc_filters[i])) 1769 break; 1770 1771 LIST_FOREACH(afp, &classifier->acc_filters[i], f_chain) 1772 if ((afp->f_handle & 0x000fffff) == handle) 1773 break; 1774 if (afp == NULL) 1775 break; 1776 /* this handle is already used, try again */ 1777 } 1778 1779 return ((i << 20) | handle); 1780 } 1781 1782 /* convert filter handle to filter pointer */ 1783 static struct acc_filter * 1784 filth_to_filtp(classifier, handle) 1785 struct acc_classifier *classifier; 1786 u_long handle; 1787 { 1788 struct acc_filter *afp; 1789 int i; 1790 1791 i = ACC_GET_HINDEX(handle); 1792 1793 LIST_FOREACH(afp, &classifier->acc_filters[i], f_chain) 1794 if (afp->f_handle == handle) 1795 return (afp); 1796 1797 return (NULL); 1798 } 1799 1800 /* create flowinfo bitmask */ 1801 static u_int32_t 1802 filt2fibmask(filt) 1803 struct flow_filter *filt; 1804 { 1805 u_int32_t mask = 0; 1806 #ifdef INET6 1807 struct flow_filter6 *filt6; 1808 #endif 1809 1810 switch (filt->ff_flow.fi_family) { 1811 case AF_INET: 1812 if (filt->ff_flow.fi_proto != 0) 1813 mask |= FIMB4_PROTO; 1814 if (filt->ff_flow.fi_tos != 0) 1815 mask |= FIMB4_TOS; 1816 if (filt->ff_flow.fi_dst.s_addr != 0) 1817 mask |= FIMB4_DADDR; 1818 if (filt->ff_flow.fi_src.s_addr != 0) 1819 mask |= FIMB4_SADDR; 1820 if (filt->ff_flow.fi_sport != 0) 1821 mask |= FIMB4_SPORT; 1822 if (filt->ff_flow.fi_dport != 0) 1823 mask |= FIMB4_DPORT; 1824 if (filt->ff_flow.fi_gpi != 0) 1825 mask |= FIMB4_GPI; 1826 break; 1827 #ifdef INET6 1828 case AF_INET6: 1829 filt6 = (struct flow_filter6 *)filt; 1830 1831 if (filt6->ff_flow6.fi6_proto != 0) 1832 mask |= FIMB6_PROTO; 1833 if (filt6->ff_flow6.fi6_tclass != 0) 1834 mask |= FIMB6_TCLASS; 1835 if (!IN6_IS_ADDR_UNSPECIFIED(&filt6->ff_flow6.fi6_dst)) 1836 mask |= FIMB6_DADDR; 1837 if (!IN6_IS_ADDR_UNSPECIFIED(&filt6->ff_flow6.fi6_src)) 1838 mask |= FIMB6_SADDR; 1839 if (filt6->ff_flow6.fi6_sport != 0) 1840 mask |= FIMB6_SPORT; 1841 if (filt6->ff_flow6.fi6_dport != 0) 1842 mask |= FIMB6_DPORT; 1843 if (filt6->ff_flow6.fi6_gpi != 0) 1844 mask |= FIMB6_GPI; 1845 if (filt6->ff_flow6.fi6_flowlabel != 0) 1846 mask |= FIMB6_FLABEL; 1847 break; 1848 #endif /* INET6 */ 1849 } 1850 return (mask); 1851 } 1852 1853 1854 /* 1855 * helper functions to handle IPv4 fragments. 1856 * currently only in-sequence fragments are handled. 1857 * - fragment info is cached in a LRU list. 1858 * - when a first fragment is found, cache its flow info. 1859 * - when a non-first fragment is found, lookup the cache. 1860 */ 1861 1862 struct ip4_frag { 1863 TAILQ_ENTRY(ip4_frag) ip4f_chain; 1864 char ip4f_valid; 1865 u_short ip4f_id; 1866 struct flowinfo_in ip4f_info; 1867 }; 1868 1869 static TAILQ_HEAD(ip4f_list, ip4_frag) ip4f_list; /* IPv4 fragment cache */ 1870 1871 #define IP4F_TABSIZE 16 /* IPv4 fragment cache size */ 1872 1873 1874 static void 1875 ip4f_cache(ip, fin) 1876 struct ip *ip; 1877 struct flowinfo_in *fin; 1878 { 1879 struct ip4_frag *fp; 1880 1881 if (TAILQ_EMPTY(&ip4f_list)) { 1882 /* first time call, allocate fragment cache entries. */ 1883 if (ip4f_init() < 0) 1884 /* allocation failed! */ 1885 return; 1886 } 1887 1888 fp = ip4f_alloc(); 1889 fp->ip4f_id = ip->ip_id; 1890 fp->ip4f_info.fi_proto = ip->ip_p; 1891 fp->ip4f_info.fi_src.s_addr = ip->ip_src.s_addr; 1892 fp->ip4f_info.fi_dst.s_addr = ip->ip_dst.s_addr; 1893 1894 /* save port numbers */ 1895 fp->ip4f_info.fi_sport = fin->fi_sport; 1896 fp->ip4f_info.fi_dport = fin->fi_dport; 1897 fp->ip4f_info.fi_gpi = fin->fi_gpi; 1898 } 1899 1900 static int 1901 ip4f_lookup(ip, fin) 1902 struct ip *ip; 1903 struct flowinfo_in *fin; 1904 { 1905 struct ip4_frag *fp; 1906 1907 for (fp = TAILQ_FIRST(&ip4f_list); fp != NULL && fp->ip4f_valid; 1908 fp = TAILQ_NEXT(fp, ip4f_chain)) 1909 if (ip->ip_id == fp->ip4f_id && 1910 ip->ip_src.s_addr == fp->ip4f_info.fi_src.s_addr && 1911 ip->ip_dst.s_addr == fp->ip4f_info.fi_dst.s_addr && 1912 ip->ip_p == fp->ip4f_info.fi_proto) { 1913 1914 /* found the matching entry */ 1915 fin->fi_sport = fp->ip4f_info.fi_sport; 1916 fin->fi_dport = fp->ip4f_info.fi_dport; 1917 fin->fi_gpi = fp->ip4f_info.fi_gpi; 1918 1919 if ((ntohs(ip->ip_off) & IP_MF) == 0) 1920 /* this is the last fragment, 1921 release the entry. */ 1922 ip4f_free(fp); 1923 1924 return (1); 1925 } 1926 1927 /* no matching entry found */ 1928 return (0); 1929 } 1930 1931 static int 1932 ip4f_init(void) 1933 { 1934 struct ip4_frag *fp; 1935 int i; 1936 1937 TAILQ_INIT(&ip4f_list); 1938 for (i=0; i<IP4F_TABSIZE; i++) { 1939 fp = malloc(sizeof(struct ip4_frag), 1940 M_DEVBUF, M_NOWAIT); 1941 if (fp == NULL) { 1942 printf("ip4f_init: can't alloc %dth entry!\n", i); 1943 if (i == 0) 1944 return (-1); 1945 return (0); 1946 } 1947 fp->ip4f_valid = 0; 1948 TAILQ_INSERT_TAIL(&ip4f_list, fp, ip4f_chain); 1949 } 1950 return (0); 1951 } 1952 1953 static struct ip4_frag * 1954 ip4f_alloc(void) 1955 { 1956 struct ip4_frag *fp; 1957 1958 /* reclaim an entry at the tail, put it at the head */ 1959 fp = TAILQ_LAST(&ip4f_list, ip4f_list); 1960 TAILQ_REMOVE(&ip4f_list, fp, ip4f_chain); 1961 fp->ip4f_valid = 1; 1962 TAILQ_INSERT_HEAD(&ip4f_list, fp, ip4f_chain); 1963 return (fp); 1964 } 1965 1966 static void 1967 ip4f_free(fp) 1968 struct ip4_frag *fp; 1969 { 1970 TAILQ_REMOVE(&ip4f_list, fp, ip4f_chain); 1971 fp->ip4f_valid = 0; 1972 TAILQ_INSERT_TAIL(&ip4f_list, fp, ip4f_chain); 1973 } 1974 1975 #endif /* ALTQ3_CLFIER_COMPAT */ 1976