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_route.h" 77 #include "opt_rss.h" 78 79 #include <sys/param.h> 80 #include <sys/systm.h> 81 #include <sys/malloc.h> 82 #include <sys/mbuf.h> 83 #include <sys/domain.h> 84 #include <sys/protosw.h> 85 #include <sys/socket.h> 86 #include <sys/socketvar.h> 87 #include <sys/sockio.h> 88 #include <sys/errno.h> 89 #include <sys/time.h> 90 #include <sys/priv.h> 91 #include <sys/proc.h> 92 #include <sys/jail.h> 93 94 #include <vm/uma.h> 95 96 #include <net/if.h> 97 #include <net/if_var.h> 98 #include <net/if_llatbl.h> 99 #include <net/if_types.h> 100 #include <net/route.h> 101 #include <net/route/nhop.h> 102 103 #include <netinet/in.h> 104 #include <netinet/in_var.h> 105 #include <netinet/in_systm.h> 106 #include <netinet/tcp_var.h> 107 #include <netinet/ip6.h> 108 #include <netinet/ip_var.h> 109 110 #include <netinet6/ip6_var.h> 111 #include <netinet6/nd6.h> 112 #include <netinet/in_pcb.h> 113 #include <netinet6/in6_pcb.h> 114 #include <netinet6/in6_fib.h> 115 #include <netinet6/scope6_var.h> 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 sockaddr_in6 laddr6; 419 int error; 420 421 bzero(&laddr6, sizeof(laddr6)); 422 laddr6.sin6_family = AF_INET6; 423 424 INP_WLOCK_ASSERT(inp); 425 INP_HASH_WLOCK_ASSERT(pcbinfo); 426 427 #ifdef ROUTE_MPATH 428 if (CALC_FLOWID_OUTBOUND) { 429 uint32_t hash_type, hash_val; 430 431 hash_val = fib6_calc_software_hash(&inp->in6p_laddr, 432 &sin6->sin6_addr, 0, sin6->sin6_port, 433 inp->inp_socket->so_proto->pr_protocol, &hash_type); 434 inp->inp_flowid = hash_val; 435 inp->inp_flowtype = hash_type; 436 } 437 #endif 438 /* 439 * Call inner routine, to assign local interface address. 440 * in6_pcbladdr() may automatically fill in sin6_scope_id. 441 */ 442 if ((error = in6_pcbladdr(inp, nam, &laddr6.sin6_addr)) != 0) 443 return (error); 444 445 if (in6_pcblookup_hash_locked(pcbinfo, &sin6->sin6_addr, 446 sin6->sin6_port, 447 IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) 448 ? &laddr6.sin6_addr : &inp->in6p_laddr, 449 inp->inp_lport, 0, NULL) != NULL) { 450 return (EADDRINUSE); 451 } 452 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 453 if (inp->inp_lport == 0) { 454 /* 455 * rehash was required to be true in the past for 456 * this case; retain that convention. However, 457 * we now call in_pcb_lport_dest rather than 458 * in6_pcbbind; the former does not insert into 459 * the hash table, the latter does. Change rehash 460 * to false to do the in_pcbinshash below. 461 */ 462 KASSERT(rehash == true, 463 ("Rehashing required for unbound inps")); 464 rehash = false; 465 error = in_pcb_lport_dest(inp, 466 (struct sockaddr *) &laddr6, &inp->inp_lport, 467 (struct sockaddr *) sin6, sin6->sin6_port, cred, 0); 468 if (error) 469 return (error); 470 } 471 inp->in6p_laddr = laddr6.sin6_addr; 472 } 473 inp->in6p_faddr = sin6->sin6_addr; 474 inp->inp_fport = sin6->sin6_port; 475 /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 476 inp->inp_flow &= ~IPV6_FLOWLABEL_MASK; 477 if (inp->inp_flags & IN6P_AUTOFLOWLABEL) 478 inp->inp_flow |= 479 (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK); 480 481 if (rehash) { 482 in_pcbrehash_mbuf(inp, m); 483 } else { 484 in_pcbinshash_mbuf(inp, m); 485 } 486 487 return (0); 488 } 489 490 int 491 in6_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred) 492 { 493 494 return (in6_pcbconnect_mbuf(inp, nam, cred, NULL, true)); 495 } 496 497 void 498 in6_pcbdisconnect(struct inpcb *inp) 499 { 500 501 INP_WLOCK_ASSERT(inp); 502 INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo); 503 504 bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr)); 505 inp->inp_fport = 0; 506 /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 507 inp->inp_flow &= ~IPV6_FLOWLABEL_MASK; 508 in_pcbrehash(inp); 509 } 510 511 struct sockaddr * 512 in6_sockaddr(in_port_t port, struct in6_addr *addr_p) 513 { 514 struct sockaddr_in6 *sin6; 515 516 sin6 = malloc(sizeof *sin6, M_SONAME, M_WAITOK); 517 bzero(sin6, sizeof *sin6); 518 sin6->sin6_family = AF_INET6; 519 sin6->sin6_len = sizeof(*sin6); 520 sin6->sin6_port = port; 521 sin6->sin6_addr = *addr_p; 522 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */ 523 524 return (struct sockaddr *)sin6; 525 } 526 527 struct sockaddr * 528 in6_v4mapsin6_sockaddr(in_port_t port, struct in_addr *addr_p) 529 { 530 struct sockaddr_in sin; 531 struct sockaddr_in6 *sin6_p; 532 533 bzero(&sin, sizeof sin); 534 sin.sin_family = AF_INET; 535 sin.sin_len = sizeof(sin); 536 sin.sin_port = port; 537 sin.sin_addr = *addr_p; 538 539 sin6_p = malloc(sizeof *sin6_p, M_SONAME, 540 M_WAITOK); 541 in6_sin_2_v4mapsin6(&sin, sin6_p); 542 543 return (struct sockaddr *)sin6_p; 544 } 545 546 int 547 in6_getsockaddr(struct socket *so, struct sockaddr **nam) 548 { 549 struct inpcb *inp; 550 struct in6_addr addr; 551 in_port_t port; 552 553 inp = sotoinpcb(so); 554 KASSERT(inp != NULL, ("in6_getsockaddr: inp == NULL")); 555 556 INP_RLOCK(inp); 557 port = inp->inp_lport; 558 addr = inp->in6p_laddr; 559 INP_RUNLOCK(inp); 560 561 *nam = in6_sockaddr(port, &addr); 562 return 0; 563 } 564 565 int 566 in6_getpeeraddr(struct socket *so, struct sockaddr **nam) 567 { 568 struct inpcb *inp; 569 struct in6_addr addr; 570 in_port_t port; 571 572 inp = sotoinpcb(so); 573 KASSERT(inp != NULL, ("in6_getpeeraddr: inp == NULL")); 574 575 INP_RLOCK(inp); 576 port = inp->inp_fport; 577 addr = inp->in6p_faddr; 578 INP_RUNLOCK(inp); 579 580 *nam = in6_sockaddr(port, &addr); 581 return 0; 582 } 583 584 int 585 in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam) 586 { 587 struct inpcb *inp; 588 int error; 589 590 inp = sotoinpcb(so); 591 KASSERT(inp != NULL, ("in6_mapped_sockaddr: inp == NULL")); 592 593 #ifdef INET 594 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) { 595 error = in_getsockaddr(so, nam); 596 if (error == 0) 597 in6_sin_2_v4mapsin6_in_sock(nam); 598 } else 599 #endif 600 { 601 /* scope issues will be handled in in6_getsockaddr(). */ 602 error = in6_getsockaddr(so, nam); 603 } 604 605 return error; 606 } 607 608 int 609 in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam) 610 { 611 struct inpcb *inp; 612 int error; 613 614 inp = sotoinpcb(so); 615 KASSERT(inp != NULL, ("in6_mapped_peeraddr: inp == NULL")); 616 617 #ifdef INET 618 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) { 619 error = in_getpeeraddr(so, nam); 620 if (error == 0) 621 in6_sin_2_v4mapsin6_in_sock(nam); 622 } else 623 #endif 624 /* scope issues will be handled in in6_getpeeraddr(). */ 625 error = in6_getpeeraddr(so, nam); 626 627 return error; 628 } 629 630 /* 631 * Pass some notification to all connections of a protocol 632 * associated with address dst. The local address and/or port numbers 633 * may be specified to limit the search. The "usual action" will be 634 * taken, depending on the ctlinput cmd. The caller must filter any 635 * cmds that are uninteresting (e.g., no error in the map). 636 * Call the protocol specific routine (if any) to report 637 * any errors for each matching socket. 638 */ 639 void 640 in6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr *dst, 641 u_int fport_arg, const struct sockaddr *src, u_int lport_arg, 642 int cmd, void *cmdarg, 643 struct inpcb *(*notify)(struct inpcb *, int)) 644 { 645 struct inpcb *inp, *inp_temp; 646 struct sockaddr_in6 sa6_src, *sa6_dst; 647 u_short fport = fport_arg, lport = lport_arg; 648 u_int32_t flowinfo; 649 int errno; 650 651 if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6) 652 return; 653 654 sa6_dst = (struct sockaddr_in6 *)dst; 655 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr)) 656 return; 657 658 /* 659 * note that src can be NULL when we get notify by local fragmentation. 660 */ 661 sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src; 662 flowinfo = sa6_src.sin6_flowinfo; 663 664 /* 665 * Redirects go to all references to the destination, 666 * and use in6_rtchange to invalidate the route cache. 667 * Dead host indications: also use in6_rtchange to invalidate 668 * the cache, and deliver the error to all the sockets. 669 * Otherwise, if we have knowledge of the local port and address, 670 * deliver only to that socket. 671 */ 672 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 673 fport = 0; 674 lport = 0; 675 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr)); 676 677 if (cmd != PRC_HOSTDEAD) 678 notify = in6_rtchange; 679 } 680 errno = inet6ctlerrmap[cmd]; 681 INP_INFO_WLOCK(pcbinfo); 682 CK_LIST_FOREACH_SAFE(inp, pcbinfo->ipi_listhead, inp_list, inp_temp) { 683 INP_WLOCK(inp); 684 if ((inp->inp_vflag & INP_IPV6) == 0) { 685 INP_WUNLOCK(inp); 686 continue; 687 } 688 689 /* 690 * If the error designates a new path MTU for a destination 691 * and the application (associated with this socket) wanted to 692 * know the value, notify. 693 * XXX: should we avoid to notify the value to TCP sockets? 694 */ 695 if (cmd == PRC_MSGSIZE && cmdarg != NULL) 696 ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst, 697 *(u_int32_t *)cmdarg); 698 699 /* 700 * Detect if we should notify the error. If no source and 701 * destination ports are specifed, but non-zero flowinfo and 702 * local address match, notify the error. This is the case 703 * when the error is delivered with an encrypted buffer 704 * by ESP. Otherwise, just compare addresses and ports 705 * as usual. 706 */ 707 if (lport == 0 && fport == 0 && flowinfo && 708 inp->inp_socket != NULL && 709 flowinfo == (inp->inp_flow & IPV6_FLOWLABEL_MASK) && 710 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr)) 711 goto do_notify; 712 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, 713 &sa6_dst->sin6_addr) || 714 inp->inp_socket == 0 || 715 (lport && inp->inp_lport != lport) || 716 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) && 717 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 718 &sa6_src.sin6_addr)) || 719 (fport && inp->inp_fport != fport)) { 720 INP_WUNLOCK(inp); 721 continue; 722 } 723 724 do_notify: 725 if (notify) { 726 if ((*notify)(inp, errno)) 727 INP_WUNLOCK(inp); 728 } else 729 INP_WUNLOCK(inp); 730 } 731 INP_INFO_WUNLOCK(pcbinfo); 732 } 733 734 /* 735 * Lookup a PCB based on the local address and port. Caller must hold the 736 * hash lock. No inpcb locks or references are acquired. 737 */ 738 struct inpcb * 739 in6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr, 740 u_short lport, int lookupflags, struct ucred *cred) 741 { 742 struct inpcb *inp; 743 int matchwild = 3, wildcard; 744 745 KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0, 746 ("%s: invalid lookup flags %d", __func__, lookupflags)); 747 748 INP_HASH_LOCK_ASSERT(pcbinfo); 749 750 if ((lookupflags & INPLOOKUP_WILDCARD) == 0) { 751 struct inpcbhead *head; 752 /* 753 * Look for an unconnected (wildcard foreign addr) PCB that 754 * matches the local address and port we're looking for. 755 */ 756 head = &pcbinfo->ipi_hashbase[INP_PCBHASH( 757 INP6_PCBHASHKEY(&in6addr_any), lport, 0, 758 pcbinfo->ipi_hashmask)]; 759 CK_LIST_FOREACH(inp, head, inp_hash) { 760 /* XXX inp locking */ 761 if ((inp->inp_vflag & INP_IPV6) == 0) 762 continue; 763 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 764 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 765 inp->inp_lport == lport) { 766 /* Found. */ 767 if (cred == NULL || 768 prison_equal_ip6(cred->cr_prison, 769 inp->inp_cred->cr_prison)) 770 return (inp); 771 } 772 } 773 /* 774 * Not found. 775 */ 776 return (NULL); 777 } else { 778 struct inpcbporthead *porthash; 779 struct inpcbport *phd; 780 struct inpcb *match = NULL; 781 /* 782 * Best fit PCB lookup. 783 * 784 * First see if this local port is in use by looking on the 785 * port hash list. 786 */ 787 porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport, 788 pcbinfo->ipi_porthashmask)]; 789 CK_LIST_FOREACH(phd, porthash, phd_hash) { 790 if (phd->phd_port == lport) 791 break; 792 } 793 if (phd != NULL) { 794 /* 795 * Port is in use by one or more PCBs. Look for best 796 * fit. 797 */ 798 CK_LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) { 799 wildcard = 0; 800 if (cred != NULL && 801 !prison_equal_ip6(cred->cr_prison, 802 inp->inp_cred->cr_prison)) 803 continue; 804 /* XXX inp locking */ 805 if ((inp->inp_vflag & INP_IPV6) == 0) 806 continue; 807 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 808 wildcard++; 809 if (!IN6_IS_ADDR_UNSPECIFIED( 810 &inp->in6p_laddr)) { 811 if (IN6_IS_ADDR_UNSPECIFIED(laddr)) 812 wildcard++; 813 else if (!IN6_ARE_ADDR_EQUAL( 814 &inp->in6p_laddr, laddr)) 815 continue; 816 } else { 817 if (!IN6_IS_ADDR_UNSPECIFIED(laddr)) 818 wildcard++; 819 } 820 if (wildcard < matchwild) { 821 match = inp; 822 matchwild = wildcard; 823 if (matchwild == 0) 824 break; 825 } 826 } 827 } 828 return (match); 829 } 830 } 831 832 void 833 in6_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp) 834 { 835 struct inpcb *inp; 836 struct in6_multi *inm; 837 struct in6_mfilter *imf; 838 struct ip6_moptions *im6o; 839 840 INP_INFO_WLOCK(pcbinfo); 841 CK_LIST_FOREACH(inp, pcbinfo->ipi_listhead, inp_list) { 842 INP_WLOCK(inp); 843 if (__predict_false(inp->inp_flags2 & INP_FREED)) { 844 INP_WUNLOCK(inp); 845 continue; 846 } 847 im6o = inp->in6p_moptions; 848 if ((inp->inp_vflag & INP_IPV6) && im6o != NULL) { 849 /* 850 * Unselect the outgoing ifp for multicast if it 851 * is being detached. 852 */ 853 if (im6o->im6o_multicast_ifp == ifp) 854 im6o->im6o_multicast_ifp = NULL; 855 /* 856 * Drop multicast group membership if we joined 857 * through the interface being detached. 858 */ 859 restart: 860 IP6_MFILTER_FOREACH(imf, &im6o->im6o_head) { 861 if ((inm = imf->im6f_in6m) == NULL) 862 continue; 863 if (inm->in6m_ifp != ifp) 864 continue; 865 ip6_mfilter_remove(&im6o->im6o_head, imf); 866 IN6_MULTI_LOCK_ASSERT(); 867 in6_leavegroup_locked(inm, NULL); 868 ip6_mfilter_free(imf); 869 goto restart; 870 } 871 } 872 INP_WUNLOCK(inp); 873 } 874 INP_INFO_WUNLOCK(pcbinfo); 875 } 876 877 /* 878 * Check for alternatives when higher level complains 879 * about service problems. For now, invalidate cached 880 * routing information. If the route was created dynamically 881 * (by a redirect), time to try a default gateway again. 882 */ 883 void 884 in6_losing(struct inpcb *inp) 885 { 886 887 RO_INVALIDATE_CACHE(&inp->inp_route6); 888 } 889 890 /* 891 * After a routing change, flush old routing 892 * and allocate a (hopefully) better one. 893 */ 894 struct inpcb * 895 in6_rtchange(struct inpcb *inp, int errno __unused) 896 { 897 898 RO_INVALIDATE_CACHE(&inp->inp_route6); 899 return inp; 900 } 901 902 static struct inpcb * 903 in6_pcblookup_lbgroup(const struct inpcbinfo *pcbinfo, 904 const struct in6_addr *laddr, uint16_t lport, const struct in6_addr *faddr, 905 uint16_t fport, int lookupflags) 906 { 907 struct inpcb *local_wild; 908 const struct inpcblbgrouphead *hdr; 909 struct inpcblbgroup *grp; 910 uint32_t idx; 911 912 INP_HASH_LOCK_ASSERT(pcbinfo); 913 914 hdr = &pcbinfo->ipi_lbgrouphashbase[ 915 INP_PCBPORTHASH(lport, pcbinfo->ipi_lbgrouphashmask)]; 916 917 /* 918 * Order of socket selection: 919 * 1. non-wild. 920 * 2. wild (if lookupflags contains INPLOOKUP_WILDCARD). 921 * 922 * NOTE: 923 * - Load balanced group does not contain jailed sockets. 924 * - Load balanced does not contain IPv4 mapped INET6 wild sockets. 925 */ 926 local_wild = NULL; 927 CK_LIST_FOREACH(grp, hdr, il_list) { 928 #ifdef INET 929 if (!(grp->il_vflag & INP_IPV6)) 930 continue; 931 #endif 932 if (grp->il_lport != lport) 933 continue; 934 935 idx = INP_PCBLBGROUP_PKTHASH(INP6_PCBHASHKEY(faddr), lport, 936 fport) % grp->il_inpcnt; 937 if (IN6_ARE_ADDR_EQUAL(&grp->il6_laddr, laddr)) 938 return (grp->il_inp[idx]); 939 if (IN6_IS_ADDR_UNSPECIFIED(&grp->il6_laddr) && 940 (lookupflags & INPLOOKUP_WILDCARD) != 0) 941 local_wild = grp->il_inp[idx]; 942 } 943 return (local_wild); 944 } 945 946 #ifdef PCBGROUP 947 /* 948 * Lookup PCB in hash list, using pcbgroup tables. 949 */ 950 static struct inpcb * 951 in6_pcblookup_group(struct inpcbinfo *pcbinfo, struct inpcbgroup *pcbgroup, 952 struct in6_addr *faddr, u_int fport_arg, struct in6_addr *laddr, 953 u_int lport_arg, int lookupflags, struct ifnet *ifp) 954 { 955 struct inpcbhead *head; 956 struct inpcb *inp, *tmpinp; 957 u_short fport = fport_arg, lport = lport_arg; 958 bool locked; 959 960 /* 961 * First look for an exact match. 962 */ 963 tmpinp = NULL; 964 INP_GROUP_LOCK(pcbgroup); 965 head = &pcbgroup->ipg_hashbase[INP_PCBHASH( 966 INP6_PCBHASHKEY(faddr), lport, fport, pcbgroup->ipg_hashmask)]; 967 CK_LIST_FOREACH(inp, head, inp_pcbgrouphash) { 968 /* XXX inp locking */ 969 if ((inp->inp_vflag & INP_IPV6) == 0) 970 continue; 971 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) && 972 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 973 inp->inp_fport == fport && 974 inp->inp_lport == lport) { 975 /* 976 * XXX We should be able to directly return 977 * the inp here, without any checks. 978 * Well unless both bound with SO_REUSEPORT? 979 */ 980 if (prison_flag(inp->inp_cred, PR_IP6)) 981 goto found; 982 if (tmpinp == NULL) 983 tmpinp = inp; 984 } 985 } 986 if (tmpinp != NULL) { 987 inp = tmpinp; 988 goto found; 989 } 990 991 /* 992 * Then look for a wildcard match in the pcbgroup. 993 */ 994 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) { 995 struct inpcb *local_wild = NULL, *local_exact = NULL; 996 struct inpcb *jail_wild = NULL; 997 int injail; 998 999 /* 1000 * Order of socket selection - we always prefer jails. 1001 * 1. jailed, non-wild. 1002 * 2. jailed, wild. 1003 * 3. non-jailed, non-wild. 1004 * 4. non-jailed, wild. 1005 */ 1006 head = &pcbgroup->ipg_hashbase[ 1007 INP_PCBHASH(INADDR_ANY, lport, 0, pcbgroup->ipg_hashmask)]; 1008 CK_LIST_FOREACH(inp, head, inp_pcbgrouphash) { 1009 /* XXX inp locking */ 1010 if ((inp->inp_vflag & INP_IPV6) == 0) 1011 continue; 1012 1013 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 1014 inp->inp_lport != lport) { 1015 continue; 1016 } 1017 1018 injail = prison_flag(inp->inp_cred, PR_IP6); 1019 if (injail) { 1020 if (prison_check_ip6(inp->inp_cred, 1021 laddr) != 0) 1022 continue; 1023 } else { 1024 if (local_exact != NULL) 1025 continue; 1026 } 1027 1028 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) { 1029 if (injail) 1030 goto found; 1031 else 1032 local_exact = inp; 1033 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 1034 if (injail) 1035 jail_wild = inp; 1036 else 1037 local_wild = inp; 1038 } 1039 } /* LIST_FOREACH */ 1040 1041 inp = jail_wild; 1042 if (inp == NULL) 1043 inp = jail_wild; 1044 if (inp == NULL) 1045 inp = local_exact; 1046 if (inp == NULL) 1047 inp = local_wild; 1048 if (inp != NULL) 1049 goto found; 1050 } 1051 1052 /* 1053 * Then look for a wildcard match, if requested. 1054 */ 1055 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) { 1056 struct inpcb *local_wild = NULL, *local_exact = NULL; 1057 struct inpcb *jail_wild = NULL; 1058 int injail; 1059 1060 /* 1061 * Order of socket selection - we always prefer jails. 1062 * 1. jailed, non-wild. 1063 * 2. jailed, wild. 1064 * 3. non-jailed, non-wild. 1065 * 4. non-jailed, wild. 1066 */ 1067 head = &pcbinfo->ipi_wildbase[INP_PCBHASH( 1068 INP6_PCBHASHKEY(&in6addr_any), lport, 0, 1069 pcbinfo->ipi_wildmask)]; 1070 CK_LIST_FOREACH(inp, head, inp_pcbgroup_wild) { 1071 /* XXX inp locking */ 1072 if ((inp->inp_vflag & INP_IPV6) == 0) 1073 continue; 1074 1075 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 1076 inp->inp_lport != lport) { 1077 continue; 1078 } 1079 1080 injail = prison_flag(inp->inp_cred, PR_IP6); 1081 if (injail) { 1082 if (prison_check_ip6(inp->inp_cred, 1083 laddr) != 0) 1084 continue; 1085 } else { 1086 if (local_exact != NULL) 1087 continue; 1088 } 1089 1090 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) { 1091 if (injail) 1092 goto found; 1093 else 1094 local_exact = inp; 1095 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 1096 if (injail) 1097 jail_wild = inp; 1098 else 1099 local_wild = inp; 1100 } 1101 } /* LIST_FOREACH */ 1102 1103 inp = jail_wild; 1104 if (inp == NULL) 1105 inp = jail_wild; 1106 if (inp == NULL) 1107 inp = local_exact; 1108 if (inp == NULL) 1109 inp = local_wild; 1110 if (inp != NULL) 1111 goto found; 1112 } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */ 1113 INP_GROUP_UNLOCK(pcbgroup); 1114 return (NULL); 1115 1116 found: 1117 if (lookupflags & INPLOOKUP_WLOCKPCB) 1118 locked = INP_TRY_WLOCK(inp); 1119 else if (lookupflags & INPLOOKUP_RLOCKPCB) 1120 locked = INP_TRY_RLOCK(inp); 1121 else 1122 panic("%s: locking buf", __func__); 1123 if (!locked) 1124 in_pcbref(inp); 1125 INP_GROUP_UNLOCK(pcbgroup); 1126 if (!locked) { 1127 if (lookupflags & INPLOOKUP_WLOCKPCB) { 1128 INP_WLOCK(inp); 1129 if (in_pcbrele_wlocked(inp)) 1130 return (NULL); 1131 } else { 1132 INP_RLOCK(inp); 1133 if (in_pcbrele_rlocked(inp)) 1134 return (NULL); 1135 } 1136 } 1137 #ifdef INVARIANTS 1138 if (lookupflags & INPLOOKUP_WLOCKPCB) 1139 INP_WLOCK_ASSERT(inp); 1140 else 1141 INP_RLOCK_ASSERT(inp); 1142 #endif 1143 return (inp); 1144 } 1145 #endif /* PCBGROUP */ 1146 1147 /* 1148 * Lookup PCB in hash list. Used in in_pcb.c as well as here. 1149 */ 1150 struct inpcb * 1151 in6_pcblookup_hash_locked(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, 1152 u_int fport_arg, struct in6_addr *laddr, u_int lport_arg, 1153 int lookupflags, struct ifnet *ifp) 1154 { 1155 struct inpcbhead *head; 1156 struct inpcb *inp, *tmpinp; 1157 u_short fport = fport_arg, lport = lport_arg; 1158 1159 KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0, 1160 ("%s: invalid lookup flags %d", __func__, lookupflags)); 1161 1162 INP_HASH_LOCK_ASSERT(pcbinfo); 1163 1164 /* 1165 * First look for an exact match. 1166 */ 1167 tmpinp = NULL; 1168 head = &pcbinfo->ipi_hashbase[INP_PCBHASH( 1169 INP6_PCBHASHKEY(faddr), lport, fport, pcbinfo->ipi_hashmask)]; 1170 CK_LIST_FOREACH(inp, head, inp_hash) { 1171 /* XXX inp locking */ 1172 if ((inp->inp_vflag & INP_IPV6) == 0) 1173 continue; 1174 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) && 1175 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 1176 inp->inp_fport == fport && 1177 inp->inp_lport == lport) { 1178 /* 1179 * XXX We should be able to directly return 1180 * the inp here, without any checks. 1181 * Well unless both bound with SO_REUSEPORT? 1182 */ 1183 if (prison_flag(inp->inp_cred, PR_IP6)) 1184 return (inp); 1185 if (tmpinp == NULL) 1186 tmpinp = inp; 1187 } 1188 } 1189 if (tmpinp != NULL) 1190 return (tmpinp); 1191 1192 /* 1193 * Then look in lb group (for wildcard match). 1194 */ 1195 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) { 1196 inp = in6_pcblookup_lbgroup(pcbinfo, laddr, lport, faddr, 1197 fport, lookupflags); 1198 if (inp != NULL) 1199 return (inp); 1200 } 1201 1202 /* 1203 * Then look for a wildcard match, if requested. 1204 */ 1205 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) { 1206 struct inpcb *local_wild = NULL, *local_exact = NULL; 1207 struct inpcb *jail_wild = NULL; 1208 int injail; 1209 1210 /* 1211 * Order of socket selection - we always prefer jails. 1212 * 1. jailed, non-wild. 1213 * 2. jailed, wild. 1214 * 3. non-jailed, non-wild. 1215 * 4. non-jailed, wild. 1216 */ 1217 head = &pcbinfo->ipi_hashbase[INP_PCBHASH( 1218 INP6_PCBHASHKEY(&in6addr_any), lport, 0, 1219 pcbinfo->ipi_hashmask)]; 1220 CK_LIST_FOREACH(inp, head, inp_hash) { 1221 /* XXX inp locking */ 1222 if ((inp->inp_vflag & INP_IPV6) == 0) 1223 continue; 1224 1225 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 1226 inp->inp_lport != lport) { 1227 continue; 1228 } 1229 1230 injail = prison_flag(inp->inp_cred, PR_IP6); 1231 if (injail) { 1232 if (prison_check_ip6(inp->inp_cred, 1233 laddr) != 0) 1234 continue; 1235 } else { 1236 if (local_exact != NULL) 1237 continue; 1238 } 1239 1240 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) { 1241 if (injail) 1242 return (inp); 1243 else 1244 local_exact = inp; 1245 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 1246 if (injail) 1247 jail_wild = inp; 1248 else 1249 local_wild = inp; 1250 } 1251 } /* LIST_FOREACH */ 1252 1253 if (jail_wild != NULL) 1254 return (jail_wild); 1255 if (local_exact != NULL) 1256 return (local_exact); 1257 if (local_wild != NULL) 1258 return (local_wild); 1259 } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */ 1260 1261 /* 1262 * Not found. 1263 */ 1264 return (NULL); 1265 } 1266 1267 /* 1268 * Lookup PCB in hash list, using pcbinfo tables. This variation locks the 1269 * hash list lock, and will return the inpcb locked (i.e., requires 1270 * INPLOOKUP_LOCKPCB). 1271 */ 1272 static struct inpcb * 1273 in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, 1274 u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags, 1275 struct ifnet *ifp) 1276 { 1277 struct inpcb *inp; 1278 1279 inp = in6_pcblookup_hash_locked(pcbinfo, faddr, fport, laddr, lport, 1280 (lookupflags & ~(INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)), ifp); 1281 if (inp != NULL) { 1282 if (lookupflags & INPLOOKUP_WLOCKPCB) { 1283 INP_WLOCK(inp); 1284 if (__predict_false(inp->inp_flags2 & INP_FREED)) { 1285 INP_WUNLOCK(inp); 1286 inp = NULL; 1287 } 1288 } else if (lookupflags & INPLOOKUP_RLOCKPCB) { 1289 INP_RLOCK(inp); 1290 if (__predict_false(inp->inp_flags2 & INP_FREED)) { 1291 INP_RUNLOCK(inp); 1292 inp = NULL; 1293 } 1294 } else 1295 panic("%s: locking bug", __func__); 1296 #ifdef INVARIANTS 1297 if (inp != NULL) { 1298 if (lookupflags & INPLOOKUP_WLOCKPCB) 1299 INP_WLOCK_ASSERT(inp); 1300 else 1301 INP_RLOCK_ASSERT(inp); 1302 } 1303 #endif 1304 } 1305 return (inp); 1306 } 1307 1308 /* 1309 * Public inpcb lookup routines, accepting a 4-tuple, and optionally, an mbuf 1310 * from which a pre-calculated hash value may be extracted. 1311 * 1312 * Possibly more of this logic should be in in6_pcbgroup.c. 1313 */ 1314 struct inpcb * 1315 in6_pcblookup(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, u_int fport, 1316 struct in6_addr *laddr, u_int lport, int lookupflags, struct ifnet *ifp) 1317 { 1318 #if defined(PCBGROUP) && !defined(RSS) 1319 struct inpcbgroup *pcbgroup; 1320 #endif 1321 1322 KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0, 1323 ("%s: invalid lookup flags %d", __func__, lookupflags)); 1324 KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0, 1325 ("%s: LOCKPCB not set", __func__)); 1326 1327 /* 1328 * When not using RSS, use connection groups in preference to the 1329 * reservation table when looking up 4-tuples. When using RSS, just 1330 * use the reservation table, due to the cost of the Toeplitz hash 1331 * in software. 1332 * 1333 * XXXRW: This policy belongs in the pcbgroup code, as in principle 1334 * we could be doing RSS with a non-Toeplitz hash that is affordable 1335 * in software. 1336 */ 1337 #if defined(PCBGROUP) && !defined(RSS) 1338 if (in_pcbgroup_enabled(pcbinfo)) { 1339 pcbgroup = in6_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr, 1340 fport); 1341 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, fport, 1342 laddr, lport, lookupflags, ifp)); 1343 } 1344 #endif 1345 return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport, 1346 lookupflags, ifp)); 1347 } 1348 1349 struct inpcb * 1350 in6_pcblookup_mbuf(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, 1351 u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags, 1352 struct ifnet *ifp, struct mbuf *m) 1353 { 1354 #ifdef PCBGROUP 1355 struct inpcbgroup *pcbgroup; 1356 #endif 1357 1358 KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0, 1359 ("%s: invalid lookup flags %d", __func__, lookupflags)); 1360 KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0, 1361 ("%s: LOCKPCB not set", __func__)); 1362 1363 #ifdef PCBGROUP 1364 /* 1365 * If we can use a hardware-generated hash to look up the connection 1366 * group, use that connection group to find the inpcb. Otherwise 1367 * fall back on a software hash -- or the reservation table if we're 1368 * using RSS. 1369 * 1370 * XXXRW: As above, that policy belongs in the pcbgroup code. 1371 */ 1372 if (in_pcbgroup_enabled(pcbinfo) && 1373 M_HASHTYPE_TEST(m, M_HASHTYPE_NONE) == 0) { 1374 pcbgroup = in6_pcbgroup_byhash(pcbinfo, M_HASHTYPE_GET(m), 1375 m->m_pkthdr.flowid); 1376 if (pcbgroup != NULL) 1377 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, 1378 fport, laddr, lport, lookupflags, ifp)); 1379 #ifndef RSS 1380 pcbgroup = in6_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr, 1381 fport); 1382 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, fport, 1383 laddr, lport, lookupflags, ifp)); 1384 #endif 1385 } 1386 #endif 1387 return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport, 1388 lookupflags, ifp)); 1389 } 1390 1391 void 1392 init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m, int srcordst) 1393 { 1394 struct ip6_hdr *ip; 1395 1396 ip = mtod(m, struct ip6_hdr *); 1397 bzero(sin6, sizeof(*sin6)); 1398 sin6->sin6_len = sizeof(*sin6); 1399 sin6->sin6_family = AF_INET6; 1400 sin6->sin6_addr = srcordst ? ip->ip6_dst : ip->ip6_src; 1401 1402 (void)sa6_recoverscope(sin6); /* XXX: should catch errors... */ 1403 1404 return; 1405 } 1406