in6_pcb.c revision 1.120
1/* $OpenBSD: in6_pcb.c,v 1.120 2022/08/22 10:37:27 bluhm Exp $ */ 2 3/* 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32/* 33 * @(#)COPYRIGHT 1.1 (NRL) 17 January 1995 34 * 35 * NRL grants permission for redistribution and use in source and binary 36 * forms, with or without modification, of the software and documentation 37 * created at NRL provided that the following conditions are met: 38 * 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. All advertising materials mentioning features or use of this software 45 * must display the following acknowledgements: 46 * This product includes software developed by the University of 47 * California, Berkeley and its contributors. 48 * This product includes software developed at the Information 49 * Technology Division, US Naval Research Laboratory. 50 * 4. Neither the name of the NRL nor the names of its contributors 51 * may be used to endorse or promote products derived from this software 52 * without specific prior written permission. 53 * 54 * THE SOFTWARE PROVIDED BY NRL IS PROVIDED BY NRL AND CONTRIBUTORS ``AS 55 * IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 56 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 57 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL NRL OR 58 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 59 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 60 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 61 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 62 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 63 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 64 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 65 * 66 * The views and conclusions contained in the software and documentation 67 * are those of the authors and should not be interpreted as representing 68 * official policies, either expressed or implied, of the US Naval 69 * Research Laboratory (NRL). 70 */ 71 72/* 73 * Copyright (c) 1982, 1986, 1990, 1993, 1995 74 * Regents of the University of California. All rights reserved. 75 * 76 * Redistribution and use in source and binary forms, with or without 77 * modification, are permitted provided that the following conditions 78 * are met: 79 * 1. Redistributions of source code must retain the above copyright 80 * notice, this list of conditions and the following disclaimer. 81 * 2. Redistributions in binary form must reproduce the above copyright 82 * notice, this list of conditions and the following disclaimer in the 83 * documentation and/or other materials provided with the distribution. 84 * 3. Neither the name of the University nor the names of its contributors 85 * may be used to endorse or promote products derived from this software 86 * without specific prior written permission. 87 * 88 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 89 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 90 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 91 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 92 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 93 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 94 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 95 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 96 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 97 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 98 * SUCH DAMAGE. 99 * 100 */ 101 102#include "pf.h" 103#include "stoeplitz.h" 104 105#include <sys/param.h> 106#include <sys/systm.h> 107#include <sys/mbuf.h> 108#include <sys/protosw.h> 109#include <sys/socket.h> 110#include <sys/socketvar.h> 111 112#include <net/if.h> 113#include <net/if_var.h> 114#include <net/pfvar.h> 115 116#include <netinet/in.h> 117#include <netinet/ip.h> 118#include <netinet/ip_var.h> 119#include <netinet/in_pcb.h> 120 121#include <netinet6/in6_var.h> 122 123#if NSTOEPLITZ > 0 124#include <net/toeplitz.h> 125#endif 126 127const struct in6_addr zeroin6_addr; 128 129struct inpcbhead * 130in6_pcbhash(struct inpcbtable *table, int rdom, 131 const struct in6_addr *faddr, u_short fport, 132 const struct in6_addr *laddr, u_short lport) 133{ 134 SIPHASH_CTX ctx; 135 u_int32_t nrdom = htonl(rdom); 136 137 SipHash24_Init(&ctx, &table->inpt_key); 138 SipHash24_Update(&ctx, &nrdom, sizeof(nrdom)); 139 SipHash24_Update(&ctx, faddr, sizeof(*faddr)); 140 SipHash24_Update(&ctx, &fport, sizeof(fport)); 141 SipHash24_Update(&ctx, laddr, sizeof(*laddr)); 142 SipHash24_Update(&ctx, &lport, sizeof(lport)); 143 144 return (&table->inpt_hashtbl[SipHash24_End(&ctx) & table->inpt_mask]); 145} 146 147int 148in6_pcbaddrisavail(struct inpcb *inp, struct sockaddr_in6 *sin6, int wild, 149 struct proc *p) 150{ 151 struct socket *so = inp->inp_socket; 152 struct inpcbtable *table = inp->inp_table; 153 u_short lport = sin6->sin6_port; 154 int reuseport = (so->so_options & SO_REUSEPORT); 155 156 wild |= INPLOOKUP_IPV6; 157 /* KAME hack: embed scopeid */ 158 if (in6_embedscope(&sin6->sin6_addr, sin6, inp) != 0) 159 return (EINVAL); 160 /* this must be cleared for ifa_ifwithaddr() */ 161 sin6->sin6_scope_id = 0; 162 /* reject IPv4 mapped address, we have no support for it */ 163 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) 164 return (EADDRNOTAVAIL); 165 166 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 167 /* 168 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 169 * allow complete duplication of binding if 170 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 171 * and a multicast address is bound on both 172 * new and duplicated sockets. 173 */ 174 if (so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) 175 reuseport = SO_REUSEADDR | SO_REUSEPORT; 176 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 177 struct ifaddr *ifa = NULL; 178 179 sin6->sin6_port = 0; /* 180 * Yechhhh, because of upcoming 181 * call to ifa_ifwithaddr(), which 182 * does bcmp's over the PORTS as 183 * well. (What about flow?) 184 */ 185 sin6->sin6_flowinfo = 0; 186 if (!(so->so_options & SO_BINDANY) && 187 (ifa = ifa_ifwithaddr(sin6tosa(sin6), 188 inp->inp_rtableid)) == NULL) 189 return (EADDRNOTAVAIL); 190 sin6->sin6_port = lport; 191 192 /* 193 * bind to an anycast address might accidentally 194 * cause sending a packet with an anycast source 195 * address, so we forbid it. 196 * 197 * We should allow to bind to a deprecated address, 198 * since the application dare to use it. 199 * But, can we assume that they are careful enough 200 * to check if the address is deprecated or not? 201 * Maybe, as a safeguard, we should have a setsockopt 202 * flag to control the bind(2) behavior against 203 * deprecated addresses (default: forbid bind(2)). 204 */ 205 if (ifa && ifatoia6(ifa)->ia6_flags & (IN6_IFF_ANYCAST| 206 IN6_IFF_TENTATIVE|IN6_IFF_DUPLICATED|IN6_IFF_DETACHED)) 207 return (EADDRNOTAVAIL); 208 } 209 if (lport) { 210 struct inpcb *t; 211 int error = 0; 212 213 if (so->so_euid && !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 214 t = in_pcblookup_local(table, &sin6->sin6_addr, lport, 215 INPLOOKUP_WILDCARD | INPLOOKUP_IPV6, 216 inp->inp_rtableid); 217 if (t && (so->so_euid != t->inp_socket->so_euid)) 218 error = EADDRINUSE; 219 in_pcbunref(t); 220 if (error) 221 return (error); 222 } 223 t = in_pcblookup_local(table, &sin6->sin6_addr, lport, 224 wild, inp->inp_rtableid); 225 if (t && (reuseport & t->inp_socket->so_options) == 0) 226 error = EADDRINUSE; 227 in_pcbunref(t); 228 if (error) 229 return (error); 230 } 231 return (0); 232} 233 234/* 235 * Connect from a socket to a specified address. 236 * Both address and port must be specified in argument sin6. 237 * Eventually, flow labels will have to be dealt with here, as well. 238 * 239 * If don't have a local address for this socket yet, 240 * then pick one. 241 */ 242int 243in6_pcbconnect(struct inpcb *inp, struct mbuf *nam) 244{ 245 struct in6_addr *in6a = NULL; 246 struct sockaddr_in6 *sin6; 247 struct inpcb *t; 248 int error; 249 struct sockaddr_in6 tmp; 250 251 KASSERT(inp->inp_flags & INP_IPV6); 252 253 if ((error = in6_nam2sin6(nam, &sin6))) 254 return (error); 255 if (sin6->sin6_port == 0) 256 return (EADDRNOTAVAIL); 257 /* reject IPv4 mapped address, we have no support for it */ 258 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) 259 return (EADDRNOTAVAIL); 260 261 /* protect *sin6 from overwrites */ 262 tmp = *sin6; 263 sin6 = &tmp; 264 265 /* KAME hack: embed scopeid */ 266 if (in6_embedscope(&sin6->sin6_addr, sin6, inp) != 0) 267 return EINVAL; 268 /* this must be cleared for ifa_ifwithaddr() */ 269 sin6->sin6_scope_id = 0; 270 271 /* Source address selection. */ 272 /* 273 * XXX: in6_selectsrc might replace the bound local address 274 * with the address specified by setsockopt(IPV6_PKTINFO). 275 * Is it the intended behavior? 276 */ 277 error = in6_pcbselsrc(&in6a, sin6, inp, inp->inp_outputopts6); 278 if (error) 279 return (error); 280 281 inp->inp_ipv6.ip6_hlim = (u_int8_t)in6_selecthlim(inp); 282 283 t = in6_pcbhashlookup(inp->inp_table, &sin6->sin6_addr, sin6->sin6_port, 284 IN6_IS_ADDR_UNSPECIFIED(&inp->inp_laddr6) ? in6a : &inp->inp_laddr6, 285 inp->inp_lport, inp->inp_rtableid); 286 if (t != NULL) { 287 in_pcbunref(t); 288 return (EADDRINUSE); 289 } 290 291 KASSERT(IN6_IS_ADDR_UNSPECIFIED(&inp->inp_laddr6) || inp->inp_lport); 292 293 if (IN6_IS_ADDR_UNSPECIFIED(&inp->inp_laddr6)) { 294 if (inp->inp_lport == 0) { 295 error = in_pcbbind(inp, NULL, curproc); 296 if (error) 297 return (error); 298 t = in6_pcbhashlookup(inp->inp_table, &sin6->sin6_addr, 299 sin6->sin6_port, in6a, inp->inp_lport, 300 inp->inp_rtableid); 301 if (t != NULL) { 302 inp->inp_lport = 0; 303 in_pcbunref(t); 304 return (EADDRINUSE); 305 } 306 } 307 inp->inp_laddr6 = *in6a; 308 } 309 inp->inp_faddr6 = sin6->sin6_addr; 310 inp->inp_fport = sin6->sin6_port; 311 inp->inp_flowinfo &= ~IPV6_FLOWLABEL_MASK; 312 if (ip6_auto_flowlabel) 313 inp->inp_flowinfo |= 314 (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK); 315#if NSTOEPLITZ > 0 316 inp->inp_flowid = stoeplitz_ip6port(&inp->inp_faddr6, 317 &inp->inp_laddr6, inp->inp_fport, inp->inp_lport); 318#endif 319 in_pcbrehash(inp); 320 return (0); 321} 322 323/* 324 * Get the local address/port, and put it in a sockaddr_in6. 325 * This services the getsockname(2) call. 326 */ 327void 328in6_setsockaddr(struct inpcb *inp, struct mbuf *nam) 329{ 330 struct sockaddr_in6 *sin6; 331 332 nam->m_len = sizeof(struct sockaddr_in6); 333 sin6 = mtod(nam,struct sockaddr_in6 *); 334 335 bzero ((caddr_t)sin6,sizeof(struct sockaddr_in6)); 336 sin6->sin6_family = AF_INET6; 337 sin6->sin6_len = sizeof(struct sockaddr_in6); 338 sin6->sin6_port = inp->inp_lport; 339 sin6->sin6_addr = inp->inp_laddr6; 340 /* KAME hack: recover scopeid */ 341 in6_recoverscope(sin6, &inp->inp_laddr6); 342} 343 344/* 345 * Get the foreign address/port, and put it in a sockaddr_in6. 346 * This services the getpeername(2) call. 347 */ 348void 349in6_setpeeraddr(struct inpcb *inp, struct mbuf *nam) 350{ 351 struct sockaddr_in6 *sin6; 352 353 nam->m_len = sizeof(struct sockaddr_in6); 354 sin6 = mtod(nam,struct sockaddr_in6 *); 355 356 bzero ((caddr_t)sin6,sizeof(struct sockaddr_in6)); 357 sin6->sin6_family = AF_INET6; 358 sin6->sin6_len = sizeof(struct sockaddr_in6); 359 sin6->sin6_port = inp->inp_fport; 360 sin6->sin6_addr = inp->inp_faddr6; 361 /* KAME hack: recover scopeid */ 362 in6_recoverscope(sin6, &inp->inp_faddr6); 363} 364 365/* 366 * Pass some notification to all connections of a protocol 367 * associated with address dst. The local address and/or port numbers 368 * may be specified to limit the search. The "usual action" will be 369 * taken, depending on the ctlinput cmd. The caller must filter any 370 * cmds that are uninteresting (e.g., no error in the map). 371 * Call the protocol specific routine (if any) to report 372 * any errors for each matching socket. 373 * 374 * Also perform input-side security policy check 375 * once PCB to be notified has been located. 376 */ 377void 378in6_pcbnotify(struct inpcbtable *table, struct sockaddr_in6 *dst, 379 uint fport_arg, const struct sockaddr_in6 *src, uint lport_arg, 380 u_int rtable, int cmd, void *cmdarg, void (*notify)(struct inpcb *, int)) 381{ 382 SIMPLEQ_HEAD(, inpcb) inpcblist; 383 struct inpcb *inp; 384 u_short fport = fport_arg, lport = lport_arg; 385 struct sockaddr_in6 sa6_src; 386 int errno; 387 u_int32_t flowinfo; 388 u_int rdomain; 389 390 if ((unsigned)cmd >= PRC_NCMDS) 391 return; 392 393 if (IN6_IS_ADDR_UNSPECIFIED(&dst->sin6_addr)) 394 return; 395 if (IN6_IS_ADDR_V4MAPPED(&dst->sin6_addr)) { 396#ifdef DIAGNOSTIC 397 printf("%s: Huh? Thought we never got " 398 "called with mapped!\n", __func__); 399#endif 400 return; 401 } 402 403 /* 404 * note that src can be NULL when we get notify by local fragmentation. 405 */ 406 sa6_src = (src == NULL) ? sa6_any : *src; 407 flowinfo = sa6_src.sin6_flowinfo; 408 409 /* 410 * Redirects go to all references to the destination, 411 * and use in_rtchange to invalidate the route cache. 412 * Dead host indications: also use in_rtchange to invalidate 413 * the cache, and deliver the error to all the sockets. 414 * Otherwise, if we have knowledge of the local port and address, 415 * deliver only to that socket. 416 */ 417 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 418 fport = 0; 419 lport = 0; 420 sa6_src.sin6_addr = in6addr_any; 421 422 if (cmd != PRC_HOSTDEAD) 423 notify = in_rtchange; 424 } 425 errno = inet6ctlerrmap[cmd]; 426 if (notify == NULL) 427 return; 428 429 SIMPLEQ_INIT(&inpcblist); 430 rdomain = rtable_l2(rtable); 431 rw_enter_write(&table->inpt_notify); 432 mtx_enter(&table->inpt_mtx); 433 TAILQ_FOREACH(inp, &table->inpt_queue, inp_queue) { 434 if ((inp->inp_flags & INP_IPV6) == 0) 435 continue; 436 437 /* 438 * Under the following condition, notify of redirects 439 * to the pcb, without making address matches against inpcb. 440 * - redirect notification is arrived. 441 * - the inpcb is unconnected. 442 * - the inpcb is caching !RTF_HOST routing entry. 443 * - the ICMPv6 notification is from the gateway cached in the 444 * inpcb. i.e. ICMPv6 notification is from nexthop gateway 445 * the inpcb used very recently. 446 * 447 * This is to improve interaction between netbsd/openbsd 448 * redirect handling code, and inpcb route cache code. 449 * without the clause, !RTF_HOST routing entry (which carries 450 * gateway used by inpcb right before the ICMPv6 redirect) 451 * will be cached forever in unconnected inpcb. 452 * 453 * There still is a question regarding to what is TRT: 454 * - On bsdi/freebsd, RTF_HOST (cloned) routing entry will be 455 * generated on packet output. inpcb will always cache 456 * RTF_HOST routing entry so there's no need for the clause 457 * (ICMPv6 redirect will update RTF_HOST routing entry, 458 * and inpcb is caching it already). 459 * However, bsdi/freebsd are vulnerable to local DoS attacks 460 * due to the cloned routing entries. 461 * - Specwise, "destination cache" is mentioned in RFC2461. 462 * Jinmei says that it implies bsdi/freebsd behavior, itojun 463 * is not really convinced. 464 * - Having hiwat/lowat on # of cloned host route (redirect/ 465 * pmtud) may be a good idea. netbsd/openbsd has it. see 466 * icmp6_mtudisc_update(). 467 */ 468 if ((PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) && 469 IN6_IS_ADDR_UNSPECIFIED(&inp->inp_laddr6) && 470 inp->inp_route.ro_rt && 471 !(inp->inp_route.ro_rt->rt_flags & RTF_HOST)) { 472 struct sockaddr_in6 *dst6; 473 474 dst6 = satosin6(&inp->inp_route.ro_dst); 475 if (IN6_ARE_ADDR_EQUAL(&dst6->sin6_addr, 476 &dst->sin6_addr)) 477 goto do_notify; 478 } 479 480 /* 481 * Detect if we should notify the error. If no source and 482 * destination ports are specified, but non-zero flowinfo and 483 * local address match, notify the error. This is the case 484 * when the error is delivered with an encrypted buffer 485 * by ESP. Otherwise, just compare addresses and ports 486 * as usual. 487 */ 488 if (lport == 0 && fport == 0 && flowinfo && 489 inp->inp_socket != NULL && 490 flowinfo == (inp->inp_flowinfo & IPV6_FLOWLABEL_MASK) && 491 IN6_ARE_ADDR_EQUAL(&inp->inp_laddr6, &sa6_src.sin6_addr)) 492 goto do_notify; 493 else if (!IN6_ARE_ADDR_EQUAL(&inp->inp_faddr6, 494 &dst->sin6_addr) || 495 rtable_l2(inp->inp_rtableid) != rdomain || 496 inp->inp_socket == NULL || 497 (lport && inp->inp_lport != lport) || 498 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) && 499 !IN6_ARE_ADDR_EQUAL(&inp->inp_laddr6, 500 &sa6_src.sin6_addr)) || 501 (fport && inp->inp_fport != fport)) { 502 continue; 503 } 504 do_notify: 505 in_pcbref(inp); 506 SIMPLEQ_INSERT_TAIL(&inpcblist, inp, inp_notify); 507 } 508 mtx_leave(&table->inpt_mtx); 509 510 while ((inp = SIMPLEQ_FIRST(&inpcblist)) != NULL) { 511 SIMPLEQ_REMOVE_HEAD(&inpcblist, inp_notify); 512 (*notify)(inp, errno); 513 in_pcbunref(inp); 514 } 515 rw_exit_write(&table->inpt_notify); 516} 517 518struct inpcb * 519in6_pcbhashlookup(struct inpcbtable *table, const struct in6_addr *faddr, 520 u_int fport_arg, const struct in6_addr *laddr, u_int lport_arg, 521 u_int rtable) 522{ 523 struct inpcbhead *head; 524 struct inpcb *inp; 525 u_int16_t fport = fport_arg, lport = lport_arg; 526 u_int rdomain; 527 528 rdomain = rtable_l2(rtable); 529 mtx_enter(&table->inpt_mtx); 530 head = in6_pcbhash(table, rdomain, faddr, fport, laddr, lport); 531 LIST_FOREACH(inp, head, inp_hash) { 532 if (!(inp->inp_flags & INP_IPV6)) 533 continue; 534 if (IN6_ARE_ADDR_EQUAL(&inp->inp_faddr6, faddr) && 535 inp->inp_fport == fport && inp->inp_lport == lport && 536 IN6_ARE_ADDR_EQUAL(&inp->inp_laddr6, laddr) && 537 rtable_l2(inp->inp_rtableid) == rdomain) { 538 /* 539 * Move this PCB to the head of hash chain so that 540 * repeated accesses are quicker. This is analogous to 541 * the historic single-entry PCB cache. 542 */ 543 if (inp != LIST_FIRST(head)) { 544 LIST_REMOVE(inp, inp_hash); 545 LIST_INSERT_HEAD(head, inp, inp_hash); 546 } 547 break; 548 } 549 } 550 in_pcbref(inp); 551 mtx_leave(&table->inpt_mtx); 552#ifdef DIAGNOSTIC 553 if (inp == NULL && in_pcbnotifymiss) { 554 printf("%s: faddr= fport=%d laddr= lport=%d rdom=%u\n", 555 __func__, ntohs(fport), ntohs(lport), rdomain); 556 } 557#endif 558 return (inp); 559} 560 561struct inpcb * 562in6_pcblookup_listen(struct inpcbtable *table, struct in6_addr *laddr, 563 u_int lport_arg, struct mbuf *m, u_int rtable) 564{ 565 struct inpcbhead *head; 566 const struct in6_addr *key1, *key2; 567 struct inpcb *inp; 568 u_int16_t lport = lport_arg; 569 u_int rdomain; 570 571 key1 = laddr; 572 key2 = &zeroin6_addr; 573#if NPF > 0 574 if (m && m->m_pkthdr.pf.flags & PF_TAG_DIVERTED) { 575 struct pf_divert *divert; 576 577 divert = pf_find_divert(m); 578 KASSERT(divert != NULL); 579 switch (divert->type) { 580 case PF_DIVERT_TO: 581 key1 = key2 = &divert->addr.v6; 582 lport = divert->port; 583 break; 584 case PF_DIVERT_REPLY: 585 return (NULL); 586 default: 587 panic("%s: unknown divert type %d, mbuf %p, divert %p", 588 __func__, divert->type, m, divert); 589 } 590 } else if (m && m->m_pkthdr.pf.flags & PF_TAG_TRANSLATE_LOCALHOST) { 591 /* 592 * Redirected connections should not be treated the same 593 * as connections directed to ::1 since localhost 594 * can only be accessed from the host itself. 595 */ 596 key1 = &zeroin6_addr; 597 key2 = laddr; 598 } 599#endif 600 601 rdomain = rtable_l2(rtable); 602 mtx_enter(&table->inpt_mtx); 603 head = in6_pcbhash(table, rdomain, &zeroin6_addr, 0, key1, lport); 604 LIST_FOREACH(inp, head, inp_hash) { 605 if (!(inp->inp_flags & INP_IPV6)) 606 continue; 607 if (inp->inp_lport == lport && inp->inp_fport == 0 && 608 IN6_ARE_ADDR_EQUAL(&inp->inp_laddr6, key1) && 609 IN6_IS_ADDR_UNSPECIFIED(&inp->inp_faddr6) && 610 rtable_l2(inp->inp_rtableid) == rdomain) 611 break; 612 } 613 if (inp == NULL && ! IN6_ARE_ADDR_EQUAL(key1, key2)) { 614 head = in6_pcbhash(table, rdomain, 615 &zeroin6_addr, 0, key2, lport); 616 LIST_FOREACH(inp, head, inp_hash) { 617 if (!(inp->inp_flags & INP_IPV6)) 618 continue; 619 if (inp->inp_lport == lport && inp->inp_fport == 0 && 620 IN6_ARE_ADDR_EQUAL(&inp->inp_laddr6, key2) && 621 IN6_IS_ADDR_UNSPECIFIED(&inp->inp_faddr6) && 622 rtable_l2(inp->inp_rtableid) == rdomain) 623 break; 624 } 625 } 626 /* 627 * Move this PCB to the head of hash chain so that 628 * repeated accesses are quicker. This is analogous to 629 * the historic single-entry PCB cache. 630 */ 631 if (inp != NULL && inp != LIST_FIRST(head)) { 632 LIST_REMOVE(inp, inp_hash); 633 LIST_INSERT_HEAD(head, inp, inp_hash); 634 } 635 in_pcbref(inp); 636 mtx_leave(&table->inpt_mtx); 637#ifdef DIAGNOSTIC 638 if (inp == NULL && in_pcbnotifymiss) { 639 printf("%s: laddr= lport=%d rdom=%u\n", 640 __func__, ntohs(lport), rdomain); 641 } 642#endif 643 return (inp); 644} 645