1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * Copyright (c) 2010-2011 Juniper Networks, Inc. 6 * All rights reserved. 7 * 8 * Portions of this software were developed by Robert N. M. Watson under 9 * contract to Juniper Networks, Inc. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the project nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * $KAME: in6_pcb.c,v 1.31 2001/05/21 05:45:10 jinmei Exp $ 36 */ 37 38 /*- 39 * Copyright (c) 1982, 1986, 1991, 1993 40 * The Regents of the University of California. All rights reserved. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. Neither the name of the University 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 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 57 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 64 * SUCH DAMAGE. 65 * 66 * @(#)in_pcb.c 8.2 (Berkeley) 1/4/94 67 */ 68 69 #include <sys/cdefs.h> 70 __FBSDID("$FreeBSD$"); 71 72 #include "opt_inet.h" 73 #include "opt_inet6.h" 74 #include "opt_ipsec.h" 75 #include "opt_pcbgroup.h" 76 #include "opt_rss.h" 77 78 #include <sys/param.h> 79 #include <sys/systm.h> 80 #include <sys/malloc.h> 81 #include <sys/mbuf.h> 82 #include <sys/domain.h> 83 #include <sys/protosw.h> 84 #include <sys/socket.h> 85 #include <sys/socketvar.h> 86 #include <sys/sockio.h> 87 #include <sys/errno.h> 88 #include <sys/time.h> 89 #include <sys/priv.h> 90 #include <sys/proc.h> 91 #include <sys/jail.h> 92 93 #include <vm/uma.h> 94 95 #include <net/if.h> 96 #include <net/if_var.h> 97 #include <net/if_llatbl.h> 98 #include <net/if_types.h> 99 #include <net/route.h> 100 101 #include <netinet/in.h> 102 #include <netinet/in_var.h> 103 #include <netinet/in_systm.h> 104 #include <netinet/tcp_var.h> 105 #include <netinet/ip6.h> 106 #include <netinet/ip_var.h> 107 108 #include <netinet6/ip6_var.h> 109 #include <netinet6/nd6.h> 110 #include <netinet/in_pcb.h> 111 #include <netinet6/in6_pcb.h> 112 #include <netinet6/scope6_var.h> 113 114 static struct inpcb *in6_pcblookup_hash_locked(struct inpcbinfo *, 115 struct in6_addr *, u_int, struct in6_addr *, u_int, int, struct ifnet *); 116 117 int 118 in6_pcbbind(struct inpcb *inp, struct sockaddr *nam, 119 struct ucred *cred) 120 { 121 struct socket *so = inp->inp_socket; 122 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL; 123 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 124 u_short lport = 0; 125 int error, lookupflags = 0; 126 int reuseport = (so->so_options & SO_REUSEPORT); 127 128 /* 129 * XXX: Maybe we could let SO_REUSEPORT_LB set SO_REUSEPORT bit here 130 * so that we don't have to add to the (already messy) code below. 131 */ 132 int reuseport_lb = (so->so_options & SO_REUSEPORT_LB); 133 134 INP_WLOCK_ASSERT(inp); 135 INP_HASH_WLOCK_ASSERT(pcbinfo); 136 137 if (CK_STAILQ_EMPTY(&V_in6_ifaddrhead)) /* XXX broken! */ 138 return (EADDRNOTAVAIL); 139 if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) 140 return (EINVAL); 141 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT|SO_REUSEPORT_LB)) == 0) 142 lookupflags = INPLOOKUP_WILDCARD; 143 if (nam == NULL) { 144 if ((error = prison_local_ip6(cred, &inp->in6p_laddr, 145 ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0) 146 return (error); 147 } else { 148 sin6 = (struct sockaddr_in6 *)nam; 149 if (nam->sa_len != sizeof(*sin6)) 150 return (EINVAL); 151 /* 152 * family check. 153 */ 154 if (nam->sa_family != AF_INET6) 155 return (EAFNOSUPPORT); 156 157 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0) 158 return(error); 159 160 if ((error = prison_local_ip6(cred, &sin6->sin6_addr, 161 ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0) 162 return (error); 163 164 lport = sin6->sin6_port; 165 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 166 /* 167 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 168 * allow compepte duplication of binding if 169 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 170 * and a multicast address is bound on both 171 * new and duplicated sockets. 172 */ 173 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) != 0) 174 reuseport = SO_REUSEADDR|SO_REUSEPORT; 175 /* 176 * XXX: How to deal with SO_REUSEPORT_LB here? 177 * Treat same as SO_REUSEPORT for now. 178 */ 179 if ((so->so_options & 180 (SO_REUSEADDR|SO_REUSEPORT_LB)) != 0) 181 reuseport_lb = SO_REUSEADDR|SO_REUSEPORT_LB; 182 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 183 struct epoch_tracker et; 184 struct ifaddr *ifa; 185 186 sin6->sin6_port = 0; /* yech... */ 187 NET_EPOCH_ENTER(et); 188 if ((ifa = ifa_ifwithaddr((struct sockaddr *)sin6)) == 189 NULL && 190 (inp->inp_flags & INP_BINDANY) == 0) { 191 NET_EPOCH_EXIT(et); 192 return (EADDRNOTAVAIL); 193 } 194 195 /* 196 * XXX: bind to an anycast address might accidentally 197 * cause sending a packet with anycast source address. 198 * We should allow to bind to a deprecated address, since 199 * the application dares to use it. 200 */ 201 if (ifa != NULL && 202 ((struct in6_ifaddr *)ifa)->ia6_flags & 203 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) { 204 NET_EPOCH_EXIT(et); 205 return (EADDRNOTAVAIL); 206 } 207 NET_EPOCH_EXIT(et); 208 } 209 if (lport) { 210 struct inpcb *t; 211 struct tcptw *tw; 212 213 /* GROSS */ 214 if (ntohs(lport) <= V_ipport_reservedhigh && 215 ntohs(lport) >= V_ipport_reservedlow && 216 priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT)) 217 return (EACCES); 218 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) && 219 priv_check_cred(inp->inp_cred, PRIV_NETINET_REUSEPORT) != 0) { 220 t = in6_pcblookup_local(pcbinfo, 221 &sin6->sin6_addr, lport, 222 INPLOOKUP_WILDCARD, cred); 223 if (t && 224 ((inp->inp_flags2 & INP_BINDMULTI) == 0) && 225 ((t->inp_flags & INP_TIMEWAIT) == 0) && 226 (so->so_type != SOCK_STREAM || 227 IN6_IS_ADDR_UNSPECIFIED(&t->in6p_faddr)) && 228 (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 229 !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) || 230 (t->inp_flags2 & INP_REUSEPORT) || 231 (t->inp_flags2 & INP_REUSEPORT_LB) == 0) && 232 (inp->inp_cred->cr_uid != 233 t->inp_cred->cr_uid)) 234 return (EADDRINUSE); 235 236 /* 237 * If the socket is a BINDMULTI socket, then 238 * the credentials need to match and the 239 * original socket also has to have been bound 240 * with BINDMULTI. 241 */ 242 if (t && (! in_pcbbind_check_bindmulti(inp, t))) 243 return (EADDRINUSE); 244 245 #ifdef INET 246 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 && 247 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 248 struct sockaddr_in sin; 249 250 in6_sin6_2_sin(&sin, sin6); 251 t = in_pcblookup_local(pcbinfo, 252 sin.sin_addr, lport, 253 INPLOOKUP_WILDCARD, cred); 254 if (t && 255 ((inp->inp_flags2 & INP_BINDMULTI) == 0) && 256 ((t->inp_flags & 257 INP_TIMEWAIT) == 0) && 258 (so->so_type != SOCK_STREAM || 259 ntohl(t->inp_faddr.s_addr) == 260 INADDR_ANY) && 261 (inp->inp_cred->cr_uid != 262 t->inp_cred->cr_uid)) 263 return (EADDRINUSE); 264 265 if (t && (! in_pcbbind_check_bindmulti(inp, t))) 266 return (EADDRINUSE); 267 } 268 #endif 269 } 270 t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr, 271 lport, lookupflags, cred); 272 if (t && (t->inp_flags & INP_TIMEWAIT)) { 273 /* 274 * XXXRW: If an incpb has had its timewait 275 * state recycled, we treat the address as 276 * being in use (for now). This is better 277 * than a panic, but not desirable. 278 */ 279 tw = intotw(t); 280 if (tw == NULL || 281 ((reuseport & tw->tw_so_options) == 0 && 282 (reuseport_lb & tw->tw_so_options) == 0)) 283 return (EADDRINUSE); 284 } else if (t && (reuseport & inp_so_options(t)) == 0 && 285 (reuseport_lb & inp_so_options(t)) == 0) { 286 return (EADDRINUSE); 287 } 288 #ifdef INET 289 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 && 290 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 291 struct sockaddr_in sin; 292 293 in6_sin6_2_sin(&sin, sin6); 294 t = in_pcblookup_local(pcbinfo, sin.sin_addr, 295 lport, lookupflags, cred); 296 if (t && t->inp_flags & INP_TIMEWAIT) { 297 tw = intotw(t); 298 if (tw == NULL) 299 return (EADDRINUSE); 300 if ((reuseport & tw->tw_so_options) == 0 301 && (reuseport_lb & tw->tw_so_options) == 0 302 && (ntohl(t->inp_laddr.s_addr) != 303 INADDR_ANY || ((inp->inp_vflag & 304 INP_IPV6PROTO) == 305 (t->inp_vflag & INP_IPV6PROTO)))) 306 return (EADDRINUSE); 307 } else if (t && 308 (reuseport & inp_so_options(t)) == 0 && 309 (reuseport_lb & inp_so_options(t)) == 0 && 310 (ntohl(t->inp_laddr.s_addr) != INADDR_ANY || 311 (t->inp_vflag & INP_IPV6PROTO) != 0)) { 312 return (EADDRINUSE); 313 } 314 } 315 #endif 316 } 317 inp->in6p_laddr = sin6->sin6_addr; 318 } 319 if (lport == 0) { 320 if ((error = in6_pcbsetport(&inp->in6p_laddr, inp, cred)) != 0) { 321 /* Undo an address bind that may have occurred. */ 322 inp->in6p_laddr = in6addr_any; 323 return (error); 324 } 325 } else { 326 inp->inp_lport = lport; 327 if (in_pcbinshash(inp) != 0) { 328 inp->in6p_laddr = in6addr_any; 329 inp->inp_lport = 0; 330 return (EAGAIN); 331 } 332 } 333 return (0); 334 } 335 336 /* 337 * Transform old in6_pcbconnect() into an inner subroutine for new 338 * in6_pcbconnect(): Do some validity-checking on the remote 339 * address (in mbuf 'nam') and then determine local host address 340 * (i.e., which interface) to use to access that remote host. 341 * 342 * This preserves definition of in6_pcbconnect(), while supporting a 343 * slightly different version for T/TCP. (This is more than 344 * a bit of a kludge, but cleaning up the internal interfaces would 345 * have forced minor changes in every protocol). 346 */ 347 static int 348 in6_pcbladdr(struct inpcb *inp, struct sockaddr *nam, 349 struct in6_addr *plocal_addr6) 350 { 351 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 352 int error = 0; 353 int scope_ambiguous = 0; 354 struct in6_addr in6a; 355 356 INP_WLOCK_ASSERT(inp); 357 INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo); /* XXXRW: why? */ 358 359 if (nam->sa_len != sizeof (*sin6)) 360 return (EINVAL); 361 if (sin6->sin6_family != AF_INET6) 362 return (EAFNOSUPPORT); 363 if (sin6->sin6_port == 0) 364 return (EADDRNOTAVAIL); 365 366 if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone) 367 scope_ambiguous = 1; 368 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0) 369 return(error); 370 371 if (!CK_STAILQ_EMPTY(&V_in6_ifaddrhead)) { 372 /* 373 * If the destination address is UNSPECIFIED addr, 374 * use the loopback addr, e.g ::1. 375 */ 376 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 377 sin6->sin6_addr = in6addr_loopback; 378 } 379 if ((error = prison_remote_ip6(inp->inp_cred, &sin6->sin6_addr)) != 0) 380 return (error); 381 382 error = in6_selectsrc_socket(sin6, inp->in6p_outputopts, 383 inp, inp->inp_cred, scope_ambiguous, &in6a, NULL); 384 if (error) 385 return (error); 386 387 /* 388 * Do not update this earlier, in case we return with an error. 389 * 390 * XXX: this in6_selectsrc_socket result might replace the bound local 391 * address with the address specified by setsockopt(IPV6_PKTINFO). 392 * Is it the intended behavior? 393 */ 394 *plocal_addr6 = in6a; 395 396 /* 397 * Don't do pcblookup call here; return interface in 398 * plocal_addr6 399 * and exit to caller, that will do the lookup. 400 */ 401 402 return (0); 403 } 404 405 /* 406 * Outer subroutine: 407 * Connect from a socket to a specified address. 408 * Both address and port must be specified in argument sin. 409 * If don't have a local address for this socket yet, 410 * then pick one. 411 */ 412 int 413 in6_pcbconnect_mbuf(struct inpcb *inp, struct sockaddr *nam, 414 struct ucred *cred, struct mbuf *m, bool rehash) 415 { 416 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 417 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 418 struct in6_addr addr6; 419 int error; 420 421 INP_WLOCK_ASSERT(inp); 422 INP_HASH_WLOCK_ASSERT(pcbinfo); 423 424 /* 425 * Call inner routine, to assign local interface address. 426 * in6_pcbladdr() may automatically fill in sin6_scope_id. 427 */ 428 if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0) 429 return (error); 430 431 if (in6_pcblookup_hash_locked(pcbinfo, &sin6->sin6_addr, 432 sin6->sin6_port, 433 IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) 434 ? &addr6 : &inp->in6p_laddr, 435 inp->inp_lport, 0, NULL) != NULL) { 436 return (EADDRINUSE); 437 } 438 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 439 if (inp->inp_lport == 0) { 440 KASSERT(rehash == true, 441 ("Rehashing required for unbound inps")); 442 error = in6_pcbbind(inp, (struct sockaddr *)0, cred); 443 if (error) 444 return (error); 445 } 446 inp->in6p_laddr = addr6; 447 } 448 inp->in6p_faddr = sin6->sin6_addr; 449 inp->inp_fport = sin6->sin6_port; 450 /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 451 inp->inp_flow &= ~IPV6_FLOWLABEL_MASK; 452 if (inp->inp_flags & IN6P_AUTOFLOWLABEL) 453 inp->inp_flow |= 454 (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK); 455 456 if (rehash) { 457 in_pcbrehash_mbuf(inp, m); 458 } else { 459 in_pcbinshash_mbuf(inp, m); 460 } 461 462 return (0); 463 } 464 465 int 466 in6_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred) 467 { 468 469 return (in6_pcbconnect_mbuf(inp, nam, cred, NULL, true)); 470 } 471 472 void 473 in6_pcbdisconnect(struct inpcb *inp) 474 { 475 476 INP_WLOCK_ASSERT(inp); 477 INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo); 478 479 bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr)); 480 inp->inp_fport = 0; 481 /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 482 inp->inp_flow &= ~IPV6_FLOWLABEL_MASK; 483 in_pcbrehash(inp); 484 } 485 486 struct sockaddr * 487 in6_sockaddr(in_port_t port, struct in6_addr *addr_p) 488 { 489 struct sockaddr_in6 *sin6; 490 491 sin6 = malloc(sizeof *sin6, M_SONAME, M_WAITOK); 492 bzero(sin6, sizeof *sin6); 493 sin6->sin6_family = AF_INET6; 494 sin6->sin6_len = sizeof(*sin6); 495 sin6->sin6_port = port; 496 sin6->sin6_addr = *addr_p; 497 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */ 498 499 return (struct sockaddr *)sin6; 500 } 501 502 struct sockaddr * 503 in6_v4mapsin6_sockaddr(in_port_t port, struct in_addr *addr_p) 504 { 505 struct sockaddr_in sin; 506 struct sockaddr_in6 *sin6_p; 507 508 bzero(&sin, sizeof sin); 509 sin.sin_family = AF_INET; 510 sin.sin_len = sizeof(sin); 511 sin.sin_port = port; 512 sin.sin_addr = *addr_p; 513 514 sin6_p = malloc(sizeof *sin6_p, M_SONAME, 515 M_WAITOK); 516 in6_sin_2_v4mapsin6(&sin, sin6_p); 517 518 return (struct sockaddr *)sin6_p; 519 } 520 521 int 522 in6_getsockaddr(struct socket *so, struct sockaddr **nam) 523 { 524 struct inpcb *inp; 525 struct in6_addr addr; 526 in_port_t port; 527 528 inp = sotoinpcb(so); 529 KASSERT(inp != NULL, ("in6_getsockaddr: inp == NULL")); 530 531 INP_RLOCK(inp); 532 port = inp->inp_lport; 533 addr = inp->in6p_laddr; 534 INP_RUNLOCK(inp); 535 536 *nam = in6_sockaddr(port, &addr); 537 return 0; 538 } 539 540 int 541 in6_getpeeraddr(struct socket *so, struct sockaddr **nam) 542 { 543 struct inpcb *inp; 544 struct in6_addr addr; 545 in_port_t port; 546 547 inp = sotoinpcb(so); 548 KASSERT(inp != NULL, ("in6_getpeeraddr: inp == NULL")); 549 550 INP_RLOCK(inp); 551 port = inp->inp_fport; 552 addr = inp->in6p_faddr; 553 INP_RUNLOCK(inp); 554 555 *nam = in6_sockaddr(port, &addr); 556 return 0; 557 } 558 559 int 560 in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam) 561 { 562 struct inpcb *inp; 563 int error; 564 565 inp = sotoinpcb(so); 566 KASSERT(inp != NULL, ("in6_mapped_sockaddr: inp == NULL")); 567 568 #ifdef INET 569 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) { 570 error = in_getsockaddr(so, nam); 571 if (error == 0) 572 in6_sin_2_v4mapsin6_in_sock(nam); 573 } else 574 #endif 575 { 576 /* scope issues will be handled in in6_getsockaddr(). */ 577 error = in6_getsockaddr(so, nam); 578 } 579 580 return error; 581 } 582 583 int 584 in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam) 585 { 586 struct inpcb *inp; 587 int error; 588 589 inp = sotoinpcb(so); 590 KASSERT(inp != NULL, ("in6_mapped_peeraddr: inp == NULL")); 591 592 #ifdef INET 593 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) { 594 error = in_getpeeraddr(so, nam); 595 if (error == 0) 596 in6_sin_2_v4mapsin6_in_sock(nam); 597 } else 598 #endif 599 /* scope issues will be handled in in6_getpeeraddr(). */ 600 error = in6_getpeeraddr(so, nam); 601 602 return error; 603 } 604 605 /* 606 * Pass some notification to all connections of a protocol 607 * associated with address dst. The local address and/or port numbers 608 * may be specified to limit the search. The "usual action" will be 609 * taken, depending on the ctlinput cmd. The caller must filter any 610 * cmds that are uninteresting (e.g., no error in the map). 611 * Call the protocol specific routine (if any) to report 612 * any errors for each matching socket. 613 */ 614 void 615 in6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr *dst, 616 u_int fport_arg, const struct sockaddr *src, u_int lport_arg, 617 int cmd, void *cmdarg, 618 struct inpcb *(*notify)(struct inpcb *, int)) 619 { 620 struct inpcb *inp, *inp_temp; 621 struct sockaddr_in6 sa6_src, *sa6_dst; 622 u_short fport = fport_arg, lport = lport_arg; 623 u_int32_t flowinfo; 624 int errno; 625 626 if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6) 627 return; 628 629 sa6_dst = (struct sockaddr_in6 *)dst; 630 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr)) 631 return; 632 633 /* 634 * note that src can be NULL when we get notify by local fragmentation. 635 */ 636 sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src; 637 flowinfo = sa6_src.sin6_flowinfo; 638 639 /* 640 * Redirects go to all references to the destination, 641 * and use in6_rtchange to invalidate the route cache. 642 * Dead host indications: also use in6_rtchange to invalidate 643 * the cache, and deliver the error to all the sockets. 644 * Otherwise, if we have knowledge of the local port and address, 645 * deliver only to that socket. 646 */ 647 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 648 fport = 0; 649 lport = 0; 650 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr)); 651 652 if (cmd != PRC_HOSTDEAD) 653 notify = in6_rtchange; 654 } 655 errno = inet6ctlerrmap[cmd]; 656 INP_INFO_WLOCK(pcbinfo); 657 CK_LIST_FOREACH_SAFE(inp, pcbinfo->ipi_listhead, inp_list, inp_temp) { 658 INP_WLOCK(inp); 659 if ((inp->inp_vflag & INP_IPV6) == 0) { 660 INP_WUNLOCK(inp); 661 continue; 662 } 663 664 /* 665 * If the error designates a new path MTU for a destination 666 * and the application (associated with this socket) wanted to 667 * know the value, notify. 668 * XXX: should we avoid to notify the value to TCP sockets? 669 */ 670 if (cmd == PRC_MSGSIZE && cmdarg != NULL) 671 ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst, 672 *(u_int32_t *)cmdarg); 673 674 /* 675 * Detect if we should notify the error. If no source and 676 * destination ports are specifed, but non-zero flowinfo and 677 * local address match, notify the error. This is the case 678 * when the error is delivered with an encrypted buffer 679 * by ESP. Otherwise, just compare addresses and ports 680 * as usual. 681 */ 682 if (lport == 0 && fport == 0 && flowinfo && 683 inp->inp_socket != NULL && 684 flowinfo == (inp->inp_flow & IPV6_FLOWLABEL_MASK) && 685 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr)) 686 goto do_notify; 687 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, 688 &sa6_dst->sin6_addr) || 689 inp->inp_socket == 0 || 690 (lport && inp->inp_lport != lport) || 691 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) && 692 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 693 &sa6_src.sin6_addr)) || 694 (fport && inp->inp_fport != fport)) { 695 INP_WUNLOCK(inp); 696 continue; 697 } 698 699 do_notify: 700 if (notify) { 701 if ((*notify)(inp, errno)) 702 INP_WUNLOCK(inp); 703 } else 704 INP_WUNLOCK(inp); 705 } 706 INP_INFO_WUNLOCK(pcbinfo); 707 } 708 709 /* 710 * Lookup a PCB based on the local address and port. Caller must hold the 711 * hash lock. No inpcb locks or references are acquired. 712 */ 713 struct inpcb * 714 in6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr, 715 u_short lport, int lookupflags, struct ucred *cred) 716 { 717 struct inpcb *inp; 718 int matchwild = 3, wildcard; 719 720 KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0, 721 ("%s: invalid lookup flags %d", __func__, lookupflags)); 722 723 INP_HASH_LOCK_ASSERT(pcbinfo); 724 725 if ((lookupflags & INPLOOKUP_WILDCARD) == 0) { 726 struct inpcbhead *head; 727 /* 728 * Look for an unconnected (wildcard foreign addr) PCB that 729 * matches the local address and port we're looking for. 730 */ 731 head = &pcbinfo->ipi_hashbase[INP_PCBHASH( 732 INP6_PCBHASHKEY(&in6addr_any), lport, 0, 733 pcbinfo->ipi_hashmask)]; 734 CK_LIST_FOREACH(inp, head, inp_hash) { 735 /* XXX inp locking */ 736 if ((inp->inp_vflag & INP_IPV6) == 0) 737 continue; 738 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 739 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 740 inp->inp_lport == lport) { 741 /* Found. */ 742 if (cred == NULL || 743 prison_equal_ip6(cred->cr_prison, 744 inp->inp_cred->cr_prison)) 745 return (inp); 746 } 747 } 748 /* 749 * Not found. 750 */ 751 return (NULL); 752 } else { 753 struct inpcbporthead *porthash; 754 struct inpcbport *phd; 755 struct inpcb *match = NULL; 756 /* 757 * Best fit PCB lookup. 758 * 759 * First see if this local port is in use by looking on the 760 * port hash list. 761 */ 762 porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport, 763 pcbinfo->ipi_porthashmask)]; 764 CK_LIST_FOREACH(phd, porthash, phd_hash) { 765 if (phd->phd_port == lport) 766 break; 767 } 768 if (phd != NULL) { 769 /* 770 * Port is in use by one or more PCBs. Look for best 771 * fit. 772 */ 773 CK_LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) { 774 wildcard = 0; 775 if (cred != NULL && 776 !prison_equal_ip6(cred->cr_prison, 777 inp->inp_cred->cr_prison)) 778 continue; 779 /* XXX inp locking */ 780 if ((inp->inp_vflag & INP_IPV6) == 0) 781 continue; 782 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 783 wildcard++; 784 if (!IN6_IS_ADDR_UNSPECIFIED( 785 &inp->in6p_laddr)) { 786 if (IN6_IS_ADDR_UNSPECIFIED(laddr)) 787 wildcard++; 788 else if (!IN6_ARE_ADDR_EQUAL( 789 &inp->in6p_laddr, laddr)) 790 continue; 791 } else { 792 if (!IN6_IS_ADDR_UNSPECIFIED(laddr)) 793 wildcard++; 794 } 795 if (wildcard < matchwild) { 796 match = inp; 797 matchwild = wildcard; 798 if (matchwild == 0) 799 break; 800 } 801 } 802 } 803 return (match); 804 } 805 } 806 807 void 808 in6_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp) 809 { 810 struct inpcb *inp; 811 struct in6_multi *inm; 812 struct in6_mfilter *imf; 813 struct ip6_moptions *im6o; 814 815 INP_INFO_WLOCK(pcbinfo); 816 CK_LIST_FOREACH(inp, pcbinfo->ipi_listhead, inp_list) { 817 INP_WLOCK(inp); 818 if (__predict_false(inp->inp_flags2 & INP_FREED)) { 819 INP_WUNLOCK(inp); 820 continue; 821 } 822 im6o = inp->in6p_moptions; 823 if ((inp->inp_vflag & INP_IPV6) && im6o != NULL) { 824 /* 825 * Unselect the outgoing ifp for multicast if it 826 * is being detached. 827 */ 828 if (im6o->im6o_multicast_ifp == ifp) 829 im6o->im6o_multicast_ifp = NULL; 830 /* 831 * Drop multicast group membership if we joined 832 * through the interface being detached. 833 */ 834 restart: 835 IP6_MFILTER_FOREACH(imf, &im6o->im6o_head) { 836 if ((inm = imf->im6f_in6m) == NULL) 837 continue; 838 if (inm->in6m_ifp != ifp) 839 continue; 840 ip6_mfilter_remove(&im6o->im6o_head, imf); 841 IN6_MULTI_LOCK_ASSERT(); 842 in6_leavegroup_locked(inm, NULL); 843 ip6_mfilter_free(imf); 844 goto restart; 845 } 846 } 847 INP_WUNLOCK(inp); 848 } 849 INP_INFO_WUNLOCK(pcbinfo); 850 } 851 852 /* 853 * Check for alternatives when higher level complains 854 * about service problems. For now, invalidate cached 855 * routing information. If the route was created dynamically 856 * (by a redirect), time to try a default gateway again. 857 */ 858 void 859 in6_losing(struct inpcb *inp) 860 { 861 862 RO_INVALIDATE_CACHE(&inp->inp_route6); 863 } 864 865 /* 866 * After a routing change, flush old routing 867 * and allocate a (hopefully) better one. 868 */ 869 struct inpcb * 870 in6_rtchange(struct inpcb *inp, int errno __unused) 871 { 872 873 RO_INVALIDATE_CACHE(&inp->inp_route6); 874 return inp; 875 } 876 877 static struct inpcb * 878 in6_pcblookup_lbgroup(const struct inpcbinfo *pcbinfo, 879 const struct in6_addr *laddr, uint16_t lport, const struct in6_addr *faddr, 880 uint16_t fport, int lookupflags) 881 { 882 struct inpcb *local_wild; 883 const struct inpcblbgrouphead *hdr; 884 struct inpcblbgroup *grp; 885 uint32_t idx; 886 887 INP_HASH_LOCK_ASSERT(pcbinfo); 888 889 hdr = &pcbinfo->ipi_lbgrouphashbase[ 890 INP_PCBPORTHASH(lport, pcbinfo->ipi_lbgrouphashmask)]; 891 892 /* 893 * Order of socket selection: 894 * 1. non-wild. 895 * 2. wild (if lookupflags contains INPLOOKUP_WILDCARD). 896 * 897 * NOTE: 898 * - Load balanced group does not contain jailed sockets. 899 * - Load balanced does not contain IPv4 mapped INET6 wild sockets. 900 */ 901 local_wild = NULL; 902 CK_LIST_FOREACH(grp, hdr, il_list) { 903 #ifdef INET 904 if (!(grp->il_vflag & INP_IPV6)) 905 continue; 906 #endif 907 if (grp->il_lport != lport) 908 continue; 909 910 idx = INP_PCBLBGROUP_PKTHASH(INP6_PCBHASHKEY(faddr), lport, 911 fport) % grp->il_inpcnt; 912 if (IN6_ARE_ADDR_EQUAL(&grp->il6_laddr, laddr)) 913 return (grp->il_inp[idx]); 914 if (IN6_IS_ADDR_UNSPECIFIED(&grp->il6_laddr) && 915 (lookupflags & INPLOOKUP_WILDCARD) != 0) 916 local_wild = grp->il_inp[idx]; 917 } 918 return (local_wild); 919 } 920 921 #ifdef PCBGROUP 922 /* 923 * Lookup PCB in hash list, using pcbgroup tables. 924 */ 925 static struct inpcb * 926 in6_pcblookup_group(struct inpcbinfo *pcbinfo, struct inpcbgroup *pcbgroup, 927 struct in6_addr *faddr, u_int fport_arg, struct in6_addr *laddr, 928 u_int lport_arg, int lookupflags, struct ifnet *ifp) 929 { 930 struct inpcbhead *head; 931 struct inpcb *inp, *tmpinp; 932 u_short fport = fport_arg, lport = lport_arg; 933 bool locked; 934 935 /* 936 * First look for an exact match. 937 */ 938 tmpinp = NULL; 939 INP_GROUP_LOCK(pcbgroup); 940 head = &pcbgroup->ipg_hashbase[INP_PCBHASH( 941 INP6_PCBHASHKEY(faddr), lport, fport, pcbgroup->ipg_hashmask)]; 942 CK_LIST_FOREACH(inp, head, inp_pcbgrouphash) { 943 /* XXX inp locking */ 944 if ((inp->inp_vflag & INP_IPV6) == 0) 945 continue; 946 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) && 947 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 948 inp->inp_fport == fport && 949 inp->inp_lport == lport) { 950 /* 951 * XXX We should be able to directly return 952 * the inp here, without any checks. 953 * Well unless both bound with SO_REUSEPORT? 954 */ 955 if (prison_flag(inp->inp_cred, PR_IP6)) 956 goto found; 957 if (tmpinp == NULL) 958 tmpinp = inp; 959 } 960 } 961 if (tmpinp != NULL) { 962 inp = tmpinp; 963 goto found; 964 } 965 966 /* 967 * Then look for a wildcard match in the pcbgroup. 968 */ 969 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) { 970 struct inpcb *local_wild = NULL, *local_exact = NULL; 971 struct inpcb *jail_wild = NULL; 972 int injail; 973 974 /* 975 * Order of socket selection - we always prefer jails. 976 * 1. jailed, non-wild. 977 * 2. jailed, wild. 978 * 3. non-jailed, non-wild. 979 * 4. non-jailed, wild. 980 */ 981 head = &pcbgroup->ipg_hashbase[ 982 INP_PCBHASH(INADDR_ANY, lport, 0, pcbgroup->ipg_hashmask)]; 983 CK_LIST_FOREACH(inp, head, inp_pcbgrouphash) { 984 /* XXX inp locking */ 985 if ((inp->inp_vflag & INP_IPV6) == 0) 986 continue; 987 988 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 989 inp->inp_lport != lport) { 990 continue; 991 } 992 993 injail = prison_flag(inp->inp_cred, PR_IP6); 994 if (injail) { 995 if (prison_check_ip6(inp->inp_cred, 996 laddr) != 0) 997 continue; 998 } else { 999 if (local_exact != NULL) 1000 continue; 1001 } 1002 1003 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) { 1004 if (injail) 1005 goto found; 1006 else 1007 local_exact = inp; 1008 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 1009 if (injail) 1010 jail_wild = inp; 1011 else 1012 local_wild = inp; 1013 } 1014 } /* LIST_FOREACH */ 1015 1016 inp = jail_wild; 1017 if (inp == NULL) 1018 inp = jail_wild; 1019 if (inp == NULL) 1020 inp = local_exact; 1021 if (inp == NULL) 1022 inp = local_wild; 1023 if (inp != NULL) 1024 goto found; 1025 } 1026 1027 /* 1028 * Then look for a wildcard match, if requested. 1029 */ 1030 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) { 1031 struct inpcb *local_wild = NULL, *local_exact = NULL; 1032 struct inpcb *jail_wild = NULL; 1033 int injail; 1034 1035 /* 1036 * Order of socket selection - we always prefer jails. 1037 * 1. jailed, non-wild. 1038 * 2. jailed, wild. 1039 * 3. non-jailed, non-wild. 1040 * 4. non-jailed, wild. 1041 */ 1042 head = &pcbinfo->ipi_wildbase[INP_PCBHASH( 1043 INP6_PCBHASHKEY(&in6addr_any), lport, 0, 1044 pcbinfo->ipi_wildmask)]; 1045 CK_LIST_FOREACH(inp, head, inp_pcbgroup_wild) { 1046 /* XXX inp locking */ 1047 if ((inp->inp_vflag & INP_IPV6) == 0) 1048 continue; 1049 1050 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 1051 inp->inp_lport != lport) { 1052 continue; 1053 } 1054 1055 injail = prison_flag(inp->inp_cred, PR_IP6); 1056 if (injail) { 1057 if (prison_check_ip6(inp->inp_cred, 1058 laddr) != 0) 1059 continue; 1060 } else { 1061 if (local_exact != NULL) 1062 continue; 1063 } 1064 1065 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) { 1066 if (injail) 1067 goto found; 1068 else 1069 local_exact = inp; 1070 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 1071 if (injail) 1072 jail_wild = inp; 1073 else 1074 local_wild = inp; 1075 } 1076 } /* LIST_FOREACH */ 1077 1078 inp = jail_wild; 1079 if (inp == NULL) 1080 inp = jail_wild; 1081 if (inp == NULL) 1082 inp = local_exact; 1083 if (inp == NULL) 1084 inp = local_wild; 1085 if (inp != NULL) 1086 goto found; 1087 } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */ 1088 INP_GROUP_UNLOCK(pcbgroup); 1089 return (NULL); 1090 1091 found: 1092 if (lookupflags & INPLOOKUP_WLOCKPCB) 1093 locked = INP_TRY_WLOCK(inp); 1094 else if (lookupflags & INPLOOKUP_RLOCKPCB) 1095 locked = INP_TRY_RLOCK(inp); 1096 else 1097 panic("%s: locking buf", __func__); 1098 if (!locked) 1099 in_pcbref(inp); 1100 INP_GROUP_UNLOCK(pcbgroup); 1101 if (!locked) { 1102 if (lookupflags & INPLOOKUP_WLOCKPCB) { 1103 INP_WLOCK(inp); 1104 if (in_pcbrele_wlocked(inp)) 1105 return (NULL); 1106 } else { 1107 INP_RLOCK(inp); 1108 if (in_pcbrele_rlocked(inp)) 1109 return (NULL); 1110 } 1111 } 1112 #ifdef INVARIANTS 1113 if (lookupflags & INPLOOKUP_WLOCKPCB) 1114 INP_WLOCK_ASSERT(inp); 1115 else 1116 INP_RLOCK_ASSERT(inp); 1117 #endif 1118 return (inp); 1119 } 1120 #endif /* PCBGROUP */ 1121 1122 /* 1123 * Lookup PCB in hash list. 1124 */ 1125 static struct inpcb * 1126 in6_pcblookup_hash_locked(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, 1127 u_int fport_arg, struct in6_addr *laddr, u_int lport_arg, 1128 int lookupflags, struct ifnet *ifp) 1129 { 1130 struct inpcbhead *head; 1131 struct inpcb *inp, *tmpinp; 1132 u_short fport = fport_arg, lport = lport_arg; 1133 1134 KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0, 1135 ("%s: invalid lookup flags %d", __func__, lookupflags)); 1136 1137 INP_HASH_LOCK_ASSERT(pcbinfo); 1138 1139 /* 1140 * First look for an exact match. 1141 */ 1142 tmpinp = NULL; 1143 head = &pcbinfo->ipi_hashbase[INP_PCBHASH( 1144 INP6_PCBHASHKEY(faddr), lport, fport, pcbinfo->ipi_hashmask)]; 1145 CK_LIST_FOREACH(inp, head, inp_hash) { 1146 /* XXX inp locking */ 1147 if ((inp->inp_vflag & INP_IPV6) == 0) 1148 continue; 1149 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) && 1150 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 1151 inp->inp_fport == fport && 1152 inp->inp_lport == lport) { 1153 /* 1154 * XXX We should be able to directly return 1155 * the inp here, without any checks. 1156 * Well unless both bound with SO_REUSEPORT? 1157 */ 1158 if (prison_flag(inp->inp_cred, PR_IP6)) 1159 return (inp); 1160 if (tmpinp == NULL) 1161 tmpinp = inp; 1162 } 1163 } 1164 if (tmpinp != NULL) 1165 return (tmpinp); 1166 1167 /* 1168 * Then look in lb group (for wildcard match). 1169 */ 1170 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) { 1171 inp = in6_pcblookup_lbgroup(pcbinfo, laddr, lport, faddr, 1172 fport, lookupflags); 1173 if (inp != NULL) 1174 return (inp); 1175 } 1176 1177 /* 1178 * Then look for a wildcard match, if requested. 1179 */ 1180 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) { 1181 struct inpcb *local_wild = NULL, *local_exact = NULL; 1182 struct inpcb *jail_wild = NULL; 1183 int injail; 1184 1185 /* 1186 * Order of socket selection - we always prefer jails. 1187 * 1. jailed, non-wild. 1188 * 2. jailed, wild. 1189 * 3. non-jailed, non-wild. 1190 * 4. non-jailed, wild. 1191 */ 1192 head = &pcbinfo->ipi_hashbase[INP_PCBHASH( 1193 INP6_PCBHASHKEY(&in6addr_any), lport, 0, 1194 pcbinfo->ipi_hashmask)]; 1195 CK_LIST_FOREACH(inp, head, inp_hash) { 1196 /* XXX inp locking */ 1197 if ((inp->inp_vflag & INP_IPV6) == 0) 1198 continue; 1199 1200 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 1201 inp->inp_lport != lport) { 1202 continue; 1203 } 1204 1205 injail = prison_flag(inp->inp_cred, PR_IP6); 1206 if (injail) { 1207 if (prison_check_ip6(inp->inp_cred, 1208 laddr) != 0) 1209 continue; 1210 } else { 1211 if (local_exact != NULL) 1212 continue; 1213 } 1214 1215 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) { 1216 if (injail) 1217 return (inp); 1218 else 1219 local_exact = inp; 1220 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 1221 if (injail) 1222 jail_wild = inp; 1223 else 1224 local_wild = inp; 1225 } 1226 } /* LIST_FOREACH */ 1227 1228 if (jail_wild != NULL) 1229 return (jail_wild); 1230 if (local_exact != NULL) 1231 return (local_exact); 1232 if (local_wild != NULL) 1233 return (local_wild); 1234 } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */ 1235 1236 /* 1237 * Not found. 1238 */ 1239 return (NULL); 1240 } 1241 1242 /* 1243 * Lookup PCB in hash list, using pcbinfo tables. This variation locks the 1244 * hash list lock, and will return the inpcb locked (i.e., requires 1245 * INPLOOKUP_LOCKPCB). 1246 */ 1247 static struct inpcb * 1248 in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, 1249 u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags, 1250 struct ifnet *ifp) 1251 { 1252 struct inpcb *inp; 1253 1254 inp = in6_pcblookup_hash_locked(pcbinfo, faddr, fport, laddr, lport, 1255 (lookupflags & ~(INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)), ifp); 1256 if (inp != NULL) { 1257 if (lookupflags & INPLOOKUP_WLOCKPCB) { 1258 INP_WLOCK(inp); 1259 if (__predict_false(inp->inp_flags2 & INP_FREED)) { 1260 INP_WUNLOCK(inp); 1261 inp = NULL; 1262 } 1263 } else if (lookupflags & INPLOOKUP_RLOCKPCB) { 1264 INP_RLOCK(inp); 1265 if (__predict_false(inp->inp_flags2 & INP_FREED)) { 1266 INP_RUNLOCK(inp); 1267 inp = NULL; 1268 } 1269 } else 1270 panic("%s: locking bug", __func__); 1271 #ifdef INVARIANTS 1272 if (inp != NULL) { 1273 if (lookupflags & INPLOOKUP_WLOCKPCB) 1274 INP_WLOCK_ASSERT(inp); 1275 else 1276 INP_RLOCK_ASSERT(inp); 1277 } 1278 #endif 1279 } 1280 return (inp); 1281 } 1282 1283 /* 1284 * Public inpcb lookup routines, accepting a 4-tuple, and optionally, an mbuf 1285 * from which a pre-calculated hash value may be extracted. 1286 * 1287 * Possibly more of this logic should be in in6_pcbgroup.c. 1288 */ 1289 struct inpcb * 1290 in6_pcblookup(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, u_int fport, 1291 struct in6_addr *laddr, u_int lport, int lookupflags, struct ifnet *ifp) 1292 { 1293 #if defined(PCBGROUP) && !defined(RSS) 1294 struct inpcbgroup *pcbgroup; 1295 #endif 1296 1297 KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0, 1298 ("%s: invalid lookup flags %d", __func__, lookupflags)); 1299 KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0, 1300 ("%s: LOCKPCB not set", __func__)); 1301 1302 /* 1303 * When not using RSS, use connection groups in preference to the 1304 * reservation table when looking up 4-tuples. When using RSS, just 1305 * use the reservation table, due to the cost of the Toeplitz hash 1306 * in software. 1307 * 1308 * XXXRW: This policy belongs in the pcbgroup code, as in principle 1309 * we could be doing RSS with a non-Toeplitz hash that is affordable 1310 * in software. 1311 */ 1312 #if defined(PCBGROUP) && !defined(RSS) 1313 if (in_pcbgroup_enabled(pcbinfo)) { 1314 pcbgroup = in6_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr, 1315 fport); 1316 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, fport, 1317 laddr, lport, lookupflags, ifp)); 1318 } 1319 #endif 1320 return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport, 1321 lookupflags, ifp)); 1322 } 1323 1324 struct inpcb * 1325 in6_pcblookup_mbuf(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, 1326 u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags, 1327 struct ifnet *ifp, struct mbuf *m) 1328 { 1329 #ifdef PCBGROUP 1330 struct inpcbgroup *pcbgroup; 1331 #endif 1332 1333 KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0, 1334 ("%s: invalid lookup flags %d", __func__, lookupflags)); 1335 KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0, 1336 ("%s: LOCKPCB not set", __func__)); 1337 1338 #ifdef PCBGROUP 1339 /* 1340 * If we can use a hardware-generated hash to look up the connection 1341 * group, use that connection group to find the inpcb. Otherwise 1342 * fall back on a software hash -- or the reservation table if we're 1343 * using RSS. 1344 * 1345 * XXXRW: As above, that policy belongs in the pcbgroup code. 1346 */ 1347 if (in_pcbgroup_enabled(pcbinfo) && 1348 M_HASHTYPE_TEST(m, M_HASHTYPE_NONE) == 0) { 1349 pcbgroup = in6_pcbgroup_byhash(pcbinfo, M_HASHTYPE_GET(m), 1350 m->m_pkthdr.flowid); 1351 if (pcbgroup != NULL) 1352 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, 1353 fport, laddr, lport, lookupflags, ifp)); 1354 #ifndef RSS 1355 pcbgroup = in6_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr, 1356 fport); 1357 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, fport, 1358 laddr, lport, lookupflags, ifp)); 1359 #endif 1360 } 1361 #endif 1362 return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport, 1363 lookupflags, ifp)); 1364 } 1365 1366 void 1367 init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m, int srcordst) 1368 { 1369 struct ip6_hdr *ip; 1370 1371 ip = mtod(m, struct ip6_hdr *); 1372 bzero(sin6, sizeof(*sin6)); 1373 sin6->sin6_len = sizeof(*sin6); 1374 sin6->sin6_family = AF_INET6; 1375 sin6->sin6_addr = srcordst ? ip->ip6_dst : ip->ip6_src; 1376 1377 (void)sa6_recoverscope(sin6); /* XXX: should catch errors... */ 1378 1379 return; 1380 } 1381