1 /* $OpenBSD: in6_pcb.c,v 1.117 2022/04/14 14:10:22 claudio 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 126 127 const struct in6_addr zeroin6_addr; 128 129 struct inpcbhead * 130 in6_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 } 146 147 int 148 in6_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; 211 212 if (so->so_euid && !IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 213 t = in_pcblookup_local(table, &sin6->sin6_addr, lport, 214 INPLOOKUP_WILDCARD | INPLOOKUP_IPV6, 215 inp->inp_rtableid); 216 if (t && (so->so_euid != t->inp_socket->so_euid)) 217 return (EADDRINUSE); 218 } 219 t = in_pcblookup_local(table, &sin6->sin6_addr, lport, 220 wild, inp->inp_rtableid); 221 if (t && (reuseport & t->inp_socket->so_options) == 0) 222 return (EADDRINUSE); 223 } 224 return (0); 225 } 226 227 /* 228 * Connect from a socket to a specified address. 229 * Both address and port must be specified in argument sin6. 230 * Eventually, flow labels will have to be dealt with here, as well. 231 * 232 * If don't have a local address for this socket yet, 233 * then pick one. 234 */ 235 int 236 in6_pcbconnect(struct inpcb *inp, struct mbuf *nam) 237 { 238 struct in6_addr *in6a = NULL; 239 struct sockaddr_in6 *sin6; 240 int error; 241 struct sockaddr_in6 tmp; 242 243 KASSERT(inp->inp_flags & INP_IPV6); 244 245 if ((error = in6_nam2sin6(nam, &sin6))) 246 return (error); 247 if (sin6->sin6_port == 0) 248 return (EADDRNOTAVAIL); 249 /* reject IPv4 mapped address, we have no support for it */ 250 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) 251 return (EADDRNOTAVAIL); 252 253 /* protect *sin6 from overwrites */ 254 tmp = *sin6; 255 sin6 = &tmp; 256 257 /* KAME hack: embed scopeid */ 258 if (in6_embedscope(&sin6->sin6_addr, sin6, inp) != 0) 259 return EINVAL; 260 /* this must be cleared for ifa_ifwithaddr() */ 261 sin6->sin6_scope_id = 0; 262 263 /* Source address selection. */ 264 /* 265 * XXX: in6_selectsrc might replace the bound local address 266 * with the address specified by setsockopt(IPV6_PKTINFO). 267 * Is it the intended behavior? 268 */ 269 error = in6_pcbselsrc(&in6a, sin6, inp, inp->inp_outputopts6); 270 if (error) 271 return (error); 272 273 inp->inp_ipv6.ip6_hlim = (u_int8_t)in6_selecthlim(inp); 274 275 if (in6_pcbhashlookup(inp->inp_table, &sin6->sin6_addr, sin6->sin6_port, 276 IN6_IS_ADDR_UNSPECIFIED(&inp->inp_laddr6) ? in6a : &inp->inp_laddr6, 277 inp->inp_lport, inp->inp_rtableid) != NULL) { 278 return (EADDRINUSE); 279 } 280 281 KASSERT(IN6_IS_ADDR_UNSPECIFIED(&inp->inp_laddr6) || inp->inp_lport); 282 283 if (IN6_IS_ADDR_UNSPECIFIED(&inp->inp_laddr6)) { 284 if (inp->inp_lport == 0) { 285 error = in_pcbbind(inp, NULL, curproc); 286 if (error) 287 return (error); 288 if (in6_pcbhashlookup(inp->inp_table, &sin6->sin6_addr, 289 sin6->sin6_port, in6a, inp->inp_lport, 290 inp->inp_rtableid) != NULL) { 291 inp->inp_lport = 0; 292 return (EADDRINUSE); 293 } 294 } 295 inp->inp_laddr6 = *in6a; 296 } 297 inp->inp_faddr6 = sin6->sin6_addr; 298 inp->inp_fport = sin6->sin6_port; 299 inp->inp_flowinfo &= ~IPV6_FLOWLABEL_MASK; 300 if (ip6_auto_flowlabel) 301 inp->inp_flowinfo |= 302 (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK); 303 #if NSTOEPLITZ > 0 304 inp->inp_flowid = stoeplitz_ip6port(&inp->inp_faddr6, 305 &inp->inp_laddr6, inp->inp_fport, inp->inp_lport); 306 #endif 307 in_pcbrehash(inp); 308 return (0); 309 } 310 311 /* 312 * Get the local address/port, and put it in a sockaddr_in6. 313 * This services the getsockname(2) call. 314 */ 315 void 316 in6_setsockaddr(struct inpcb *inp, struct mbuf *nam) 317 { 318 struct sockaddr_in6 *sin6; 319 320 nam->m_len = sizeof(struct sockaddr_in6); 321 sin6 = mtod(nam,struct sockaddr_in6 *); 322 323 bzero ((caddr_t)sin6,sizeof(struct sockaddr_in6)); 324 sin6->sin6_family = AF_INET6; 325 sin6->sin6_len = sizeof(struct sockaddr_in6); 326 sin6->sin6_port = inp->inp_lport; 327 sin6->sin6_addr = inp->inp_laddr6; 328 /* KAME hack: recover scopeid */ 329 in6_recoverscope(sin6, &inp->inp_laddr6); 330 } 331 332 /* 333 * Get the foreign address/port, and put it in a sockaddr_in6. 334 * This services the getpeername(2) call. 335 */ 336 void 337 in6_setpeeraddr(struct inpcb *inp, struct mbuf *nam) 338 { 339 struct sockaddr_in6 *sin6; 340 341 nam->m_len = sizeof(struct sockaddr_in6); 342 sin6 = mtod(nam,struct sockaddr_in6 *); 343 344 bzero ((caddr_t)sin6,sizeof(struct sockaddr_in6)); 345 sin6->sin6_family = AF_INET6; 346 sin6->sin6_len = sizeof(struct sockaddr_in6); 347 sin6->sin6_port = inp->inp_fport; 348 sin6->sin6_addr = inp->inp_faddr6; 349 /* KAME hack: recover scopeid */ 350 in6_recoverscope(sin6, &inp->inp_faddr6); 351 } 352 353 /* 354 * Pass some notification to all connections of a protocol 355 * associated with address dst. The local address and/or port numbers 356 * may be specified to limit the search. The "usual action" will be 357 * taken, depending on the ctlinput cmd. The caller must filter any 358 * cmds that are uninteresting (e.g., no error in the map). 359 * Call the protocol specific routine (if any) to report 360 * any errors for each matching socket. 361 * 362 * Also perform input-side security policy check 363 * once PCB to be notified has been located. 364 */ 365 void 366 in6_pcbnotify(struct inpcbtable *table, struct sockaddr_in6 *dst, 367 uint fport_arg, const struct sockaddr_in6 *src, uint lport_arg, 368 u_int rtable, int cmd, void *cmdarg, void (*notify)(struct inpcb *, int)) 369 { 370 SIMPLEQ_HEAD(, inpcb) inpcblist; 371 struct inpcb *inp; 372 u_short fport = fport_arg, lport = lport_arg; 373 struct sockaddr_in6 sa6_src; 374 int errno; 375 u_int32_t flowinfo; 376 u_int rdomain; 377 378 NET_ASSERT_WLOCKED(); 379 380 if ((unsigned)cmd >= PRC_NCMDS) 381 return; 382 383 if (IN6_IS_ADDR_UNSPECIFIED(&dst->sin6_addr)) 384 return; 385 if (IN6_IS_ADDR_V4MAPPED(&dst->sin6_addr)) { 386 #ifdef DIAGNOSTIC 387 printf("%s: Huh? Thought we never got " 388 "called with mapped!\n", __func__); 389 #endif 390 return; 391 } 392 393 /* 394 * note that src can be NULL when we get notify by local fragmentation. 395 */ 396 sa6_src = (src == NULL) ? sa6_any : *src; 397 flowinfo = sa6_src.sin6_flowinfo; 398 399 /* 400 * Redirects go to all references to the destination, 401 * and use in_rtchange to invalidate the route cache. 402 * Dead host indications: also use in_rtchange to invalidate 403 * the cache, and deliver the error to all the sockets. 404 * Otherwise, if we have knowledge of the local port and address, 405 * deliver only to that socket. 406 */ 407 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 408 fport = 0; 409 lport = 0; 410 sa6_src.sin6_addr = in6addr_any; 411 412 if (cmd != PRC_HOSTDEAD) 413 notify = in_rtchange; 414 } 415 errno = inet6ctlerrmap[cmd]; 416 if (notify == NULL) 417 return; 418 419 SIMPLEQ_INIT(&inpcblist); 420 rdomain = rtable_l2(rtable); 421 mtx_enter(&table->inpt_mtx); 422 TAILQ_FOREACH(inp, &table->inpt_queue, inp_queue) { 423 if ((inp->inp_flags & INP_IPV6) == 0) 424 continue; 425 426 /* 427 * Under the following condition, notify of redirects 428 * to the pcb, without making address matches against inpcb. 429 * - redirect notification is arrived. 430 * - the inpcb is unconnected. 431 * - the inpcb is caching !RTF_HOST routing entry. 432 * - the ICMPv6 notification is from the gateway cached in the 433 * inpcb. i.e. ICMPv6 notification is from nexthop gateway 434 * the inpcb used very recently. 435 * 436 * This is to improve interaction between netbsd/openbsd 437 * redirect handling code, and inpcb route cache code. 438 * without the clause, !RTF_HOST routing entry (which carries 439 * gateway used by inpcb right before the ICMPv6 redirect) 440 * will be cached forever in unconnected inpcb. 441 * 442 * There still is a question regarding to what is TRT: 443 * - On bsdi/freebsd, RTF_HOST (cloned) routing entry will be 444 * generated on packet output. inpcb will always cache 445 * RTF_HOST routing entry so there's no need for the clause 446 * (ICMPv6 redirect will update RTF_HOST routing entry, 447 * and inpcb is caching it already). 448 * However, bsdi/freebsd are vulnerable to local DoS attacks 449 * due to the cloned routing entries. 450 * - Specwise, "destination cache" is mentioned in RFC2461. 451 * Jinmei says that it implies bsdi/freebsd behavior, itojun 452 * is not really convinced. 453 * - Having hiwat/lowat on # of cloned host route (redirect/ 454 * pmtud) may be a good idea. netbsd/openbsd has it. see 455 * icmp6_mtudisc_update(). 456 */ 457 if ((PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) && 458 IN6_IS_ADDR_UNSPECIFIED(&inp->inp_laddr6) && 459 inp->inp_route.ro_rt && 460 !(inp->inp_route.ro_rt->rt_flags & RTF_HOST)) { 461 struct sockaddr_in6 *dst6; 462 463 dst6 = satosin6(&inp->inp_route.ro_dst); 464 if (IN6_ARE_ADDR_EQUAL(&dst6->sin6_addr, 465 &dst->sin6_addr)) 466 goto do_notify; 467 } 468 469 /* 470 * Detect if we should notify the error. If no source and 471 * destination ports are specified, but non-zero flowinfo and 472 * local address match, notify the error. This is the case 473 * when the error is delivered with an encrypted buffer 474 * by ESP. Otherwise, just compare addresses and ports 475 * as usual. 476 */ 477 if (lport == 0 && fport == 0 && flowinfo && 478 inp->inp_socket != NULL && 479 flowinfo == (inp->inp_flowinfo & IPV6_FLOWLABEL_MASK) && 480 IN6_ARE_ADDR_EQUAL(&inp->inp_laddr6, &sa6_src.sin6_addr)) 481 goto do_notify; 482 else if (!IN6_ARE_ADDR_EQUAL(&inp->inp_faddr6, 483 &dst->sin6_addr) || 484 rtable_l2(inp->inp_rtableid) != rdomain || 485 inp->inp_socket == NULL || 486 (lport && inp->inp_lport != lport) || 487 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) && 488 !IN6_ARE_ADDR_EQUAL(&inp->inp_laddr6, 489 &sa6_src.sin6_addr)) || 490 (fport && inp->inp_fport != fport)) { 491 continue; 492 } 493 do_notify: 494 in_pcbref(inp); 495 SIMPLEQ_INSERT_TAIL(&inpcblist, inp, inp_notify); 496 } 497 mtx_leave(&table->inpt_mtx); 498 499 while ((inp = SIMPLEQ_FIRST(&inpcblist)) != NULL) { 500 SIMPLEQ_REMOVE_HEAD(&inpcblist, inp_notify); 501 (*notify)(inp, errno); 502 in_pcbunref(inp); 503 } 504 } 505 506 struct inpcb * 507 in6_pcbhashlookup(struct inpcbtable *table, const struct in6_addr *faddr, 508 u_int fport_arg, const struct in6_addr *laddr, u_int lport_arg, 509 u_int rtable) 510 { 511 struct inpcbhead *head; 512 struct inpcb *inp; 513 u_int16_t fport = fport_arg, lport = lport_arg; 514 u_int rdomain; 515 516 rdomain = rtable_l2(rtable); 517 mtx_enter(&table->inpt_mtx); 518 head = in6_pcbhash(table, rdomain, faddr, fport, laddr, lport); 519 LIST_FOREACH(inp, head, inp_hash) { 520 if (!(inp->inp_flags & INP_IPV6)) 521 continue; 522 if (IN6_ARE_ADDR_EQUAL(&inp->inp_faddr6, faddr) && 523 inp->inp_fport == fport && inp->inp_lport == lport && 524 IN6_ARE_ADDR_EQUAL(&inp->inp_laddr6, laddr) && 525 rtable_l2(inp->inp_rtableid) == rdomain) { 526 /* 527 * Move this PCB to the head of hash chain so that 528 * repeated accesses are quicker. This is analogous to 529 * the historic single-entry PCB cache. 530 */ 531 if (inp != LIST_FIRST(head)) { 532 LIST_REMOVE(inp, inp_hash); 533 LIST_INSERT_HEAD(head, inp, inp_hash); 534 } 535 break; 536 } 537 } 538 mtx_leave(&table->inpt_mtx); 539 #ifdef DIAGNOSTIC 540 if (inp == NULL && in_pcbnotifymiss) { 541 printf("%s: faddr= fport=%d laddr= lport=%d rdom=%u\n", 542 __func__, ntohs(fport), ntohs(lport), rdomain); 543 } 544 #endif 545 return (inp); 546 } 547 548 struct inpcb * 549 in6_pcblookup_listen(struct inpcbtable *table, struct in6_addr *laddr, 550 u_int lport_arg, struct mbuf *m, u_int rtable) 551 { 552 struct inpcbhead *head; 553 const struct in6_addr *key1, *key2; 554 struct inpcb *inp; 555 u_int16_t lport = lport_arg; 556 u_int rdomain; 557 558 key1 = laddr; 559 key2 = &zeroin6_addr; 560 #if NPF > 0 561 if (m && m->m_pkthdr.pf.flags & PF_TAG_DIVERTED) { 562 struct pf_divert *divert; 563 564 divert = pf_find_divert(m); 565 KASSERT(divert != NULL); 566 switch (divert->type) { 567 case PF_DIVERT_TO: 568 key1 = key2 = &divert->addr.v6; 569 lport = divert->port; 570 break; 571 case PF_DIVERT_REPLY: 572 return (NULL); 573 default: 574 panic("%s: unknown divert type %d, mbuf %p, divert %p", 575 __func__, divert->type, m, divert); 576 } 577 } else if (m && m->m_pkthdr.pf.flags & PF_TAG_TRANSLATE_LOCALHOST) { 578 /* 579 * Redirected connections should not be treated the same 580 * as connections directed to ::1 since localhost 581 * can only be accessed from the host itself. 582 */ 583 key1 = &zeroin6_addr; 584 key2 = laddr; 585 } 586 #endif 587 588 rdomain = rtable_l2(rtable); 589 mtx_enter(&table->inpt_mtx); 590 head = in6_pcbhash(table, rdomain, &zeroin6_addr, 0, key1, lport); 591 LIST_FOREACH(inp, head, inp_hash) { 592 if (!(inp->inp_flags & INP_IPV6)) 593 continue; 594 if (inp->inp_lport == lport && inp->inp_fport == 0 && 595 IN6_ARE_ADDR_EQUAL(&inp->inp_laddr6, key1) && 596 IN6_IS_ADDR_UNSPECIFIED(&inp->inp_faddr6) && 597 rtable_l2(inp->inp_rtableid) == rdomain) 598 break; 599 } 600 if (inp == NULL && ! IN6_ARE_ADDR_EQUAL(key1, key2)) { 601 head = in6_pcbhash(table, rdomain, 602 &zeroin6_addr, 0, key2, lport); 603 LIST_FOREACH(inp, head, inp_hash) { 604 if (!(inp->inp_flags & INP_IPV6)) 605 continue; 606 if (inp->inp_lport == lport && inp->inp_fport == 0 && 607 IN6_ARE_ADDR_EQUAL(&inp->inp_laddr6, key2) && 608 IN6_IS_ADDR_UNSPECIFIED(&inp->inp_faddr6) && 609 rtable_l2(inp->inp_rtableid) == rdomain) 610 break; 611 } 612 } 613 /* 614 * Move this PCB to the head of hash chain so that 615 * repeated accesses are quicker. This is analogous to 616 * the historic single-entry PCB cache. 617 */ 618 if (inp != NULL && inp != LIST_FIRST(head)) { 619 LIST_REMOVE(inp, inp_hash); 620 LIST_INSERT_HEAD(head, inp, inp_hash); 621 } 622 mtx_leave(&table->inpt_mtx); 623 #ifdef DIAGNOSTIC 624 if (inp == NULL && in_pcbnotifymiss) { 625 printf("%s: laddr= lport=%d rdom=%u\n", 626 __func__, ntohs(lport), rdomain); 627 } 628 #endif 629 return (inp); 630 } 631