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sys/netinet6/in6_pcb.c
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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, M_NODOM) != 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, 468 INPLOOKUP_WILDCARD); 469 if (error) 470 return (error); 471 } 472 inp->in6p_laddr = laddr6.sin6_addr; 473 } 474 inp->in6p_faddr = sin6->sin6_addr; 475 inp->inp_fport = sin6->sin6_port; 476 /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 477 inp->inp_flow &= ~IPV6_FLOWLABEL_MASK; 478 if (inp->inp_flags & IN6P_AUTOFLOWLABEL) 479 inp->inp_flow |= 480 (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK); 481 482 if (rehash) { 483 in_pcbrehash_mbuf(inp, m); 484 } else { 485 in_pcbinshash_mbuf(inp, m); 486 } 487 488 return (0); 489 } 490 491 int 492 in6_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred) 493 { 494 495 return (in6_pcbconnect_mbuf(inp, nam, cred, NULL, true)); 496 } 497 498 void 499 in6_pcbdisconnect(struct inpcb *inp) 500 { 501 502 INP_WLOCK_ASSERT(inp); 503 INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo); 504 505 bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr)); 506 inp->inp_fport = 0; 507 /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 508 inp->inp_flow &= ~IPV6_FLOWLABEL_MASK; 509 in_pcbrehash(inp); 510 } 511 512 struct sockaddr * 513 in6_sockaddr(in_port_t port, struct in6_addr *addr_p) 514 { 515 struct sockaddr_in6 *sin6; 516 517 sin6 = malloc(sizeof *sin6, M_SONAME, M_WAITOK); 518 bzero(sin6, sizeof *sin6); 519 sin6->sin6_family = AF_INET6; 520 sin6->sin6_len = sizeof(*sin6); 521 sin6->sin6_port = port; 522 sin6->sin6_addr = *addr_p; 523 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */ 524 525 return (struct sockaddr *)sin6; 526 } 527 528 struct sockaddr * 529 in6_v4mapsin6_sockaddr(in_port_t port, struct in_addr *addr_p) 530 { 531 struct sockaddr_in sin; 532 struct sockaddr_in6 *sin6_p; 533 534 bzero(&sin, sizeof sin); 535 sin.sin_family = AF_INET; 536 sin.sin_len = sizeof(sin); 537 sin.sin_port = port; 538 sin.sin_addr = *addr_p; 539 540 sin6_p = malloc(sizeof *sin6_p, M_SONAME, 541 M_WAITOK); 542 in6_sin_2_v4mapsin6(&sin, sin6_p); 543 544 return (struct sockaddr *)sin6_p; 545 } 546 547 int 548 in6_getsockaddr(struct socket *so, struct sockaddr **nam) 549 { 550 struct inpcb *inp; 551 struct in6_addr addr; 552 in_port_t port; 553 554 inp = sotoinpcb(so); 555 KASSERT(inp != NULL, ("in6_getsockaddr: inp == NULL")); 556 557 INP_RLOCK(inp); 558 port = inp->inp_lport; 559 addr = inp->in6p_laddr; 560 INP_RUNLOCK(inp); 561 562 *nam = in6_sockaddr(port, &addr); 563 return 0; 564 } 565 566 int 567 in6_getpeeraddr(struct socket *so, struct sockaddr **nam) 568 { 569 struct inpcb *inp; 570 struct in6_addr addr; 571 in_port_t port; 572 573 inp = sotoinpcb(so); 574 KASSERT(inp != NULL, ("in6_getpeeraddr: inp == NULL")); 575 576 INP_RLOCK(inp); 577 port = inp->inp_fport; 578 addr = inp->in6p_faddr; 579 INP_RUNLOCK(inp); 580 581 *nam = in6_sockaddr(port, &addr); 582 return 0; 583 } 584 585 int 586 in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam) 587 { 588 struct inpcb *inp; 589 int error; 590 591 inp = sotoinpcb(so); 592 KASSERT(inp != NULL, ("in6_mapped_sockaddr: inp == NULL")); 593 594 #ifdef INET 595 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) { 596 error = in_getsockaddr(so, nam); 597 if (error == 0) 598 in6_sin_2_v4mapsin6_in_sock(nam); 599 } else 600 #endif 601 { 602 /* scope issues will be handled in in6_getsockaddr(). */ 603 error = in6_getsockaddr(so, nam); 604 } 605 606 return error; 607 } 608 609 int 610 in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam) 611 { 612 struct inpcb *inp; 613 int error; 614 615 inp = sotoinpcb(so); 616 KASSERT(inp != NULL, ("in6_mapped_peeraddr: inp == NULL")); 617 618 #ifdef INET 619 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) { 620 error = in_getpeeraddr(so, nam); 621 if (error == 0) 622 in6_sin_2_v4mapsin6_in_sock(nam); 623 } else 624 #endif 625 /* scope issues will be handled in in6_getpeeraddr(). */ 626 error = in6_getpeeraddr(so, nam); 627 628 return error; 629 } 630 631 /* 632 * Pass some notification to all connections of a protocol 633 * associated with address dst. The local address and/or port numbers 634 * may be specified to limit the search. The "usual action" will be 635 * taken, depending on the ctlinput cmd. The caller must filter any 636 * cmds that are uninteresting (e.g., no error in the map). 637 * Call the protocol specific routine (if any) to report 638 * any errors for each matching socket. 639 */ 640 void 641 in6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr *dst, 642 u_int fport_arg, const struct sockaddr *src, u_int lport_arg, 643 int cmd, void *cmdarg, 644 struct inpcb *(*notify)(struct inpcb *, int)) 645 { 646 struct inpcb *inp, *inp_temp; 647 struct sockaddr_in6 sa6_src, *sa6_dst; 648 u_short fport = fport_arg, lport = lport_arg; 649 u_int32_t flowinfo; 650 int errno; 651 652 if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6) 653 return; 654 655 sa6_dst = (struct sockaddr_in6 *)dst; 656 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr)) 657 return; 658 659 /* 660 * note that src can be NULL when we get notify by local fragmentation. 661 */ 662 sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src; 663 flowinfo = sa6_src.sin6_flowinfo; 664 665 /* 666 * Redirects go to all references to the destination, 667 * and use in6_rtchange to invalidate the route cache. 668 * Dead host indications: also use in6_rtchange to invalidate 669 * the cache, and deliver the error to all the sockets. 670 * Otherwise, if we have knowledge of the local port and address, 671 * deliver only to that socket. 672 */ 673 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 674 fport = 0; 675 lport = 0; 676 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr)); 677 678 if (cmd != PRC_HOSTDEAD) 679 notify = in6_rtchange; 680 } 681 errno = inet6ctlerrmap[cmd]; 682 INP_INFO_WLOCK(pcbinfo); 683 CK_LIST_FOREACH_SAFE(inp, pcbinfo->ipi_listhead, inp_list, inp_temp) { 684 INP_WLOCK(inp); 685 if ((inp->inp_vflag & INP_IPV6) == 0) { 686 INP_WUNLOCK(inp); 687 continue; 688 } 689 690 /* 691 * If the error designates a new path MTU for a destination 692 * and the application (associated with this socket) wanted to 693 * know the value, notify. 694 * XXX: should we avoid to notify the value to TCP sockets? 695 */ 696 if (cmd == PRC_MSGSIZE && cmdarg != NULL) 697 ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst, 698 *(u_int32_t *)cmdarg); 699 700 /* 701 * Detect if we should notify the error. If no source and 702 * destination ports are specifed, but non-zero flowinfo and 703 * local address match, notify the error. This is the case 704 * when the error is delivered with an encrypted buffer 705 * by ESP. Otherwise, just compare addresses and ports 706 * as usual. 707 */ 708 if (lport == 0 && fport == 0 && flowinfo && 709 inp->inp_socket != NULL && 710 flowinfo == (inp->inp_flow & IPV6_FLOWLABEL_MASK) && 711 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr)) 712 goto do_notify; 713 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, 714 &sa6_dst->sin6_addr) || 715 inp->inp_socket == 0 || 716 (lport && inp->inp_lport != lport) || 717 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) && 718 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 719 &sa6_src.sin6_addr)) || 720 (fport && inp->inp_fport != fport)) { 721 INP_WUNLOCK(inp); 722 continue; 723 } 724 725 do_notify: 726 if (notify) { 727 if ((*notify)(inp, errno)) 728 INP_WUNLOCK(inp); 729 } else 730 INP_WUNLOCK(inp); 731 } 732 INP_INFO_WUNLOCK(pcbinfo); 733 } 734 735 /* 736 * Lookup a PCB based on the local address and port. Caller must hold the 737 * hash lock. No inpcb locks or references are acquired. 738 */ 739 struct inpcb * 740 in6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr, 741 u_short lport, int lookupflags, struct ucred *cred) 742 { 743 struct inpcb *inp; 744 int matchwild = 3, wildcard; 745 746 KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0, 747 ("%s: invalid lookup flags %d", __func__, lookupflags)); 748 749 INP_HASH_LOCK_ASSERT(pcbinfo); 750 751 if ((lookupflags & INPLOOKUP_WILDCARD) == 0) { 752 struct inpcbhead *head; 753 /* 754 * Look for an unconnected (wildcard foreign addr) PCB that 755 * matches the local address and port we're looking for. 756 */ 757 head = &pcbinfo->ipi_hashbase[INP_PCBHASH( 758 INP6_PCBHASHKEY(&in6addr_any), lport, 0, 759 pcbinfo->ipi_hashmask)]; 760 CK_LIST_FOREACH(inp, head, inp_hash) { 761 /* XXX inp locking */ 762 if ((inp->inp_vflag & INP_IPV6) == 0) 763 continue; 764 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 765 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 766 inp->inp_lport == lport) { 767 /* Found. */ 768 if (cred == NULL || 769 prison_equal_ip6(cred->cr_prison, 770 inp->inp_cred->cr_prison)) 771 return (inp); 772 } 773 } 774 /* 775 * Not found. 776 */ 777 return (NULL); 778 } else { 779 struct inpcbporthead *porthash; 780 struct inpcbport *phd; 781 struct inpcb *match = NULL; 782 /* 783 * Best fit PCB lookup. 784 * 785 * First see if this local port is in use by looking on the 786 * port hash list. 787 */ 788 porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport, 789 pcbinfo->ipi_porthashmask)]; 790 CK_LIST_FOREACH(phd, porthash, phd_hash) { 791 if (phd->phd_port == lport) 792 break; 793 } 794 if (phd != NULL) { 795 /* 796 * Port is in use by one or more PCBs. Look for best 797 * fit. 798 */ 799 CK_LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) { 800 wildcard = 0; 801 if (cred != NULL && 802 !prison_equal_ip6(cred->cr_prison, 803 inp->inp_cred->cr_prison)) 804 continue; 805 /* XXX inp locking */ 806 if ((inp->inp_vflag & INP_IPV6) == 0) 807 continue; 808 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 809 wildcard++; 810 if (!IN6_IS_ADDR_UNSPECIFIED( 811 &inp->in6p_laddr)) { 812 if (IN6_IS_ADDR_UNSPECIFIED(laddr)) 813 wildcard++; 814 else if (!IN6_ARE_ADDR_EQUAL( 815 &inp->in6p_laddr, laddr)) 816 continue; 817 } else { 818 if (!IN6_IS_ADDR_UNSPECIFIED(laddr)) 819 wildcard++; 820 } 821 if (wildcard < matchwild) { 822 match = inp; 823 matchwild = wildcard; 824 if (matchwild == 0) 825 break; 826 } 827 } 828 } 829 return (match); 830 } 831 } 832 833 void 834 in6_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp) 835 { 836 struct inpcb *inp; 837 struct in6_multi *inm; 838 struct in6_mfilter *imf; 839 struct ip6_moptions *im6o; 840 841 INP_INFO_WLOCK(pcbinfo); 842 CK_LIST_FOREACH(inp, pcbinfo->ipi_listhead, inp_list) { 843 INP_WLOCK(inp); 844 if (__predict_false(inp->inp_flags2 & INP_FREED)) { 845 INP_WUNLOCK(inp); 846 continue; 847 } 848 im6o = inp->in6p_moptions; 849 if ((inp->inp_vflag & INP_IPV6) && im6o != NULL) { 850 /* 851 * Unselect the outgoing ifp for multicast if it 852 * is being detached. 853 */ 854 if (im6o->im6o_multicast_ifp == ifp) 855 im6o->im6o_multicast_ifp = NULL; 856 /* 857 * Drop multicast group membership if we joined 858 * through the interface being detached. 859 */ 860 restart: 861 IP6_MFILTER_FOREACH(imf, &im6o->im6o_head) { 862 if ((inm = imf->im6f_in6m) == NULL) 863 continue; 864 if (inm->in6m_ifp != ifp) 865 continue; 866 ip6_mfilter_remove(&im6o->im6o_head, imf); 867 IN6_MULTI_LOCK_ASSERT(); 868 in6_leavegroup_locked(inm, NULL); 869 ip6_mfilter_free(imf); 870 goto restart; 871 } 872 } 873 INP_WUNLOCK(inp); 874 } 875 INP_INFO_WUNLOCK(pcbinfo); 876 } 877 878 /* 879 * Check for alternatives when higher level complains 880 * about service problems. For now, invalidate cached 881 * routing information. If the route was created dynamically 882 * (by a redirect), time to try a default gateway again. 883 */ 884 void 885 in6_losing(struct inpcb *inp) 886 { 887 888 RO_INVALIDATE_CACHE(&inp->inp_route6); 889 } 890 891 /* 892 * After a routing change, flush old routing 893 * and allocate a (hopefully) better one. 894 */ 895 struct inpcb * 896 in6_rtchange(struct inpcb *inp, int errno __unused) 897 { 898 899 RO_INVALIDATE_CACHE(&inp->inp_route6); 900 return inp; 901 } 902 903 static struct inpcb * 904 in6_pcblookup_lbgroup(const struct inpcbinfo *pcbinfo, 905 const struct in6_addr *laddr, uint16_t lport, const struct in6_addr *faddr, 906 uint16_t fport, int lookupflags, uint8_t numa_domain) 907 { 908 struct inpcb *local_wild, *numa_wild; 909 const struct inpcblbgrouphead *hdr; 910 struct inpcblbgroup *grp; 911 uint32_t idx; 912 913 INP_HASH_LOCK_ASSERT(pcbinfo); 914 915 hdr = &pcbinfo->ipi_lbgrouphashbase[ 916 INP_PCBPORTHASH(lport, pcbinfo->ipi_lbgrouphashmask)]; 917 918 /* 919 * Order of socket selection: 920 * 1. non-wild. 921 * 2. wild (if lookupflags contains INPLOOKUP_WILDCARD). 922 * 923 * NOTE: 924 * - Load balanced group does not contain jailed sockets. 925 * - Load balanced does not contain IPv4 mapped INET6 wild sockets. 926 */ 927 local_wild = NULL; 928 numa_wild = NULL; 929 CK_LIST_FOREACH(grp, hdr, il_list) { 930 #ifdef INET 931 if (!(grp->il_vflag & INP_IPV6)) 932 continue; 933 #endif 934 if (grp->il_lport != lport) 935 continue; 936 937 idx = INP_PCBLBGROUP_PKTHASH(INP6_PCBHASHKEY(faddr), lport, 938 fport) % grp->il_inpcnt; 939 if (IN6_ARE_ADDR_EQUAL(&grp->il6_laddr, laddr)) { 940 if (numa_domain == M_NODOM || 941 grp->il_numa_domain == numa_domain) { 942 return (grp->il_inp[idx]); 943 } 944 else 945 numa_wild = grp->il_inp[idx]; 946 } 947 if (IN6_IS_ADDR_UNSPECIFIED(&grp->il6_laddr) && 948 (lookupflags & INPLOOKUP_WILDCARD) != 0 && 949 (local_wild == NULL || numa_domain == M_NODOM || 950 grp->il_numa_domain == numa_domain)) { 951 local_wild = grp->il_inp[idx]; 952 } 953 } 954 if (numa_wild != NULL) 955 return (numa_wild); 956 return (local_wild); 957 } 958 959 #ifdef PCBGROUP 960 /* 961 * Lookup PCB in hash list, using pcbgroup tables. 962 */ 963 static struct inpcb * 964 in6_pcblookup_group(struct inpcbinfo *pcbinfo, struct inpcbgroup *pcbgroup, 965 struct in6_addr *faddr, u_int fport_arg, struct in6_addr *laddr, 966 u_int lport_arg, int lookupflags, struct ifnet *ifp) 967 { 968 struct inpcbhead *head; 969 struct inpcb *inp, *tmpinp; 970 u_short fport = fport_arg, lport = lport_arg; 971 bool locked; 972 973 /* 974 * First look for an exact match. 975 */ 976 tmpinp = NULL; 977 INP_GROUP_LOCK(pcbgroup); 978 head = &pcbgroup->ipg_hashbase[INP_PCBHASH( 979 INP6_PCBHASHKEY(faddr), lport, fport, pcbgroup->ipg_hashmask)]; 980 CK_LIST_FOREACH(inp, head, inp_pcbgrouphash) { 981 /* XXX inp locking */ 982 if ((inp->inp_vflag & INP_IPV6) == 0) 983 continue; 984 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) && 985 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 986 inp->inp_fport == fport && 987 inp->inp_lport == lport) { 988 /* 989 * XXX We should be able to directly return 990 * the inp here, without any checks. 991 * Well unless both bound with SO_REUSEPORT? 992 */ 993 if (prison_flag(inp->inp_cred, PR_IP6)) 994 goto found; 995 if (tmpinp == NULL) 996 tmpinp = inp; 997 } 998 } 999 if (tmpinp != NULL) { 1000 inp = tmpinp; 1001 goto found; 1002 } 1003 1004 /* 1005 * Then look for a wildcard match in the pcbgroup. 1006 */ 1007 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) { 1008 struct inpcb *local_wild = NULL, *local_exact = NULL; 1009 struct inpcb *jail_wild = NULL; 1010 int injail; 1011 1012 /* 1013 * Order of socket selection - we always prefer jails. 1014 * 1. jailed, non-wild. 1015 * 2. jailed, wild. 1016 * 3. non-jailed, non-wild. 1017 * 4. non-jailed, wild. 1018 */ 1019 head = &pcbgroup->ipg_hashbase[ 1020 INP_PCBHASH(INADDR_ANY, lport, 0, pcbgroup->ipg_hashmask)]; 1021 CK_LIST_FOREACH(inp, head, inp_pcbgrouphash) { 1022 /* XXX inp locking */ 1023 if ((inp->inp_vflag & INP_IPV6) == 0) 1024 continue; 1025 1026 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 1027 inp->inp_lport != lport) { 1028 continue; 1029 } 1030 1031 injail = prison_flag(inp->inp_cred, PR_IP6); 1032 if (injail) { 1033 if (prison_check_ip6(inp->inp_cred, 1034 laddr) != 0) 1035 continue; 1036 } else { 1037 if (local_exact != NULL) 1038 continue; 1039 } 1040 1041 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) { 1042 if (injail) 1043 goto found; 1044 else 1045 local_exact = inp; 1046 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 1047 if (injail) 1048 jail_wild = inp; 1049 else 1050 local_wild = inp; 1051 } 1052 } /* LIST_FOREACH */ 1053 1054 inp = jail_wild; 1055 if (inp == NULL) 1056 inp = jail_wild; 1057 if (inp == NULL) 1058 inp = local_exact; 1059 if (inp == NULL) 1060 inp = local_wild; 1061 if (inp != NULL) 1062 goto found; 1063 } 1064 1065 /* 1066 * Then look for a wildcard match, if requested. 1067 */ 1068 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) { 1069 struct inpcb *local_wild = NULL, *local_exact = NULL; 1070 struct inpcb *jail_wild = NULL; 1071 int injail; 1072 1073 /* 1074 * Order of socket selection - we always prefer jails. 1075 * 1. jailed, non-wild. 1076 * 2. jailed, wild. 1077 * 3. non-jailed, non-wild. 1078 * 4. non-jailed, wild. 1079 */ 1080 head = &pcbinfo->ipi_wildbase[INP_PCBHASH( 1081 INP6_PCBHASHKEY(&in6addr_any), lport, 0, 1082 pcbinfo->ipi_wildmask)]; 1083 CK_LIST_FOREACH(inp, head, inp_pcbgroup_wild) { 1084 /* XXX inp locking */ 1085 if ((inp->inp_vflag & INP_IPV6) == 0) 1086 continue; 1087 1088 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 1089 inp->inp_lport != lport) { 1090 continue; 1091 } 1092 1093 injail = prison_flag(inp->inp_cred, PR_IP6); 1094 if (injail) { 1095 if (prison_check_ip6(inp->inp_cred, 1096 laddr) != 0) 1097 continue; 1098 } else { 1099 if (local_exact != NULL) 1100 continue; 1101 } 1102 1103 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) { 1104 if (injail) 1105 goto found; 1106 else 1107 local_exact = inp; 1108 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 1109 if (injail) 1110 jail_wild = inp; 1111 else 1112 local_wild = inp; 1113 } 1114 } /* LIST_FOREACH */ 1115 1116 inp = jail_wild; 1117 if (inp == NULL) 1118 inp = jail_wild; 1119 if (inp == NULL) 1120 inp = local_exact; 1121 if (inp == NULL) 1122 inp = local_wild; 1123 if (inp != NULL) 1124 goto found; 1125 } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */ 1126 INP_GROUP_UNLOCK(pcbgroup); 1127 return (NULL); 1128 1129 found: 1130 if (lookupflags & INPLOOKUP_WLOCKPCB) 1131 locked = INP_TRY_WLOCK(inp); 1132 else if (lookupflags & INPLOOKUP_RLOCKPCB) 1133 locked = INP_TRY_RLOCK(inp); 1134 else 1135 panic("%s: locking buf", __func__); 1136 if (!locked) 1137 in_pcbref(inp); 1138 INP_GROUP_UNLOCK(pcbgroup); 1139 if (!locked) { 1140 if (lookupflags & INPLOOKUP_WLOCKPCB) { 1141 INP_WLOCK(inp); 1142 if (in_pcbrele_wlocked(inp)) 1143 return (NULL); 1144 } else { 1145 INP_RLOCK(inp); 1146 if (in_pcbrele_rlocked(inp)) 1147 return (NULL); 1148 } 1149 } 1150 #ifdef INVARIANTS 1151 if (lookupflags & INPLOOKUP_WLOCKPCB) 1152 INP_WLOCK_ASSERT(inp); 1153 else 1154 INP_RLOCK_ASSERT(inp); 1155 #endif 1156 return (inp); 1157 } 1158 #endif /* PCBGROUP */ 1159 1160 /* 1161 * Lookup PCB in hash list. Used in in_pcb.c as well as here. 1162 */ 1163 struct inpcb * 1164 in6_pcblookup_hash_locked(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, 1165 u_int fport_arg, struct in6_addr *laddr, u_int lport_arg, 1166 int lookupflags, struct ifnet *ifp, uint8_t numa_domain) 1167 { 1168 struct inpcbhead *head; 1169 struct inpcb *inp, *tmpinp; 1170 u_short fport = fport_arg, lport = lport_arg; 1171 1172 KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0, 1173 ("%s: invalid lookup flags %d", __func__, lookupflags)); 1174 1175 INP_HASH_LOCK_ASSERT(pcbinfo); 1176 1177 /* 1178 * First look for an exact match. 1179 */ 1180 tmpinp = NULL; 1181 head = &pcbinfo->ipi_hashbase[INP_PCBHASH( 1182 INP6_PCBHASHKEY(faddr), lport, fport, pcbinfo->ipi_hashmask)]; 1183 CK_LIST_FOREACH(inp, head, inp_hash) { 1184 /* XXX inp locking */ 1185 if ((inp->inp_vflag & INP_IPV6) == 0) 1186 continue; 1187 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) && 1188 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 1189 inp->inp_fport == fport && 1190 inp->inp_lport == lport) { 1191 /* 1192 * XXX We should be able to directly return 1193 * the inp here, without any checks. 1194 * Well unless both bound with SO_REUSEPORT? 1195 */ 1196 if (prison_flag(inp->inp_cred, PR_IP6)) 1197 return (inp); 1198 if (tmpinp == NULL) 1199 tmpinp = inp; 1200 } 1201 } 1202 if (tmpinp != NULL) 1203 return (tmpinp); 1204 1205 /* 1206 * Then look in lb group (for wildcard match). 1207 */ 1208 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) { 1209 inp = in6_pcblookup_lbgroup(pcbinfo, laddr, lport, faddr, 1210 fport, lookupflags, numa_domain); 1211 if (inp != NULL) 1212 return (inp); 1213 } 1214 1215 /* 1216 * Then look for a wildcard match, if requested. 1217 */ 1218 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) { 1219 struct inpcb *local_wild = NULL, *local_exact = NULL; 1220 struct inpcb *jail_wild = NULL; 1221 int injail; 1222 1223 /* 1224 * Order of socket selection - we always prefer jails. 1225 * 1. jailed, non-wild. 1226 * 2. jailed, wild. 1227 * 3. non-jailed, non-wild. 1228 * 4. non-jailed, wild. 1229 */ 1230 head = &pcbinfo->ipi_hashbase[INP_PCBHASH( 1231 INP6_PCBHASHKEY(&in6addr_any), lport, 0, 1232 pcbinfo->ipi_hashmask)]; 1233 CK_LIST_FOREACH(inp, head, inp_hash) { 1234 /* XXX inp locking */ 1235 if ((inp->inp_vflag & INP_IPV6) == 0) 1236 continue; 1237 1238 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 1239 inp->inp_lport != lport) { 1240 continue; 1241 } 1242 1243 injail = prison_flag(inp->inp_cred, PR_IP6); 1244 if (injail) { 1245 if (prison_check_ip6(inp->inp_cred, 1246 laddr) != 0) 1247 continue; 1248 } else { 1249 if (local_exact != NULL) 1250 continue; 1251 } 1252 1253 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) { 1254 if (injail) 1255 return (inp); 1256 else 1257 local_exact = inp; 1258 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 1259 if (injail) 1260 jail_wild = inp; 1261 else 1262 local_wild = inp; 1263 } 1264 } /* LIST_FOREACH */ 1265 1266 if (jail_wild != NULL) 1267 return (jail_wild); 1268 if (local_exact != NULL) 1269 return (local_exact); 1270 if (local_wild != NULL) 1271 return (local_wild); 1272 } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */ 1273 1274 /* 1275 * Not found. 1276 */ 1277 return (NULL); 1278 } 1279 1280 /* 1281 * Lookup PCB in hash list, using pcbinfo tables. This variation locks the 1282 * hash list lock, and will return the inpcb locked (i.e., requires 1283 * INPLOOKUP_LOCKPCB). 1284 */ 1285 static struct inpcb * 1286 in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, 1287 u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags, 1288 struct ifnet *ifp, uint8_t numa_domain) 1289 { 1290 struct inpcb *inp; 1291 1292 inp = in6_pcblookup_hash_locked(pcbinfo, faddr, fport, laddr, lport, 1293 (lookupflags & ~(INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)), ifp, 1294 numa_domain); 1295 if (inp != NULL) { 1296 if (lookupflags & INPLOOKUP_WLOCKPCB) { 1297 INP_WLOCK(inp); 1298 if (__predict_false(inp->inp_flags2 & INP_FREED)) { 1299 INP_WUNLOCK(inp); 1300 inp = NULL; 1301 } 1302 } else if (lookupflags & INPLOOKUP_RLOCKPCB) { 1303 INP_RLOCK(inp); 1304 if (__predict_false(inp->inp_flags2 & INP_FREED)) { 1305 INP_RUNLOCK(inp); 1306 inp = NULL; 1307 } 1308 } else 1309 panic("%s: locking bug", __func__); 1310 #ifdef INVARIANTS 1311 if (inp != NULL) { 1312 if (lookupflags & INPLOOKUP_WLOCKPCB) 1313 INP_WLOCK_ASSERT(inp); 1314 else 1315 INP_RLOCK_ASSERT(inp); 1316 } 1317 #endif 1318 } 1319 return (inp); 1320 } 1321 1322 /* 1323 * Public inpcb lookup routines, accepting a 4-tuple, and optionally, an mbuf 1324 * from which a pre-calculated hash value may be extracted. 1325 * 1326 * Possibly more of this logic should be in in6_pcbgroup.c. 1327 */ 1328 struct inpcb * 1329 in6_pcblookup(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, u_int fport, 1330 struct in6_addr *laddr, u_int lport, int lookupflags, struct ifnet *ifp) 1331 { 1332 #if defined(PCBGROUP) && !defined(RSS) 1333 struct inpcbgroup *pcbgroup; 1334 #endif 1335 1336 KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0, 1337 ("%s: invalid lookup flags %d", __func__, lookupflags)); 1338 KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0, 1339 ("%s: LOCKPCB not set", __func__)); 1340 1341 /* 1342 * When not using RSS, use connection groups in preference to the 1343 * reservation table when looking up 4-tuples. When using RSS, just 1344 * use the reservation table, due to the cost of the Toeplitz hash 1345 * in software. 1346 * 1347 * XXXRW: This policy belongs in the pcbgroup code, as in principle 1348 * we could be doing RSS with a non-Toeplitz hash that is affordable 1349 * in software. 1350 */ 1351 #if defined(PCBGROUP) && !defined(RSS) 1352 if (in_pcbgroup_enabled(pcbinfo)) { 1353 pcbgroup = in6_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr, 1354 fport); 1355 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, fport, 1356 laddr, lport, lookupflags, ifp)); 1357 } 1358 #endif 1359 return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport, 1360 lookupflags, ifp, M_NODOM)); 1361 } 1362 1363 struct inpcb * 1364 in6_pcblookup_mbuf(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, 1365 u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags, 1366 struct ifnet *ifp, struct mbuf *m) 1367 { 1368 #ifdef PCBGROUP 1369 struct inpcbgroup *pcbgroup; 1370 #endif 1371 1372 KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0, 1373 ("%s: invalid lookup flags %d", __func__, lookupflags)); 1374 KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0, 1375 ("%s: LOCKPCB not set", __func__)); 1376 1377 #ifdef PCBGROUP 1378 /* 1379 * If we can use a hardware-generated hash to look up the connection 1380 * group, use that connection group to find the inpcb. Otherwise 1381 * fall back on a software hash -- or the reservation table if we're 1382 * using RSS. 1383 * 1384 * XXXRW: As above, that policy belongs in the pcbgroup code. 1385 */ 1386 if (in_pcbgroup_enabled(pcbinfo) && 1387 M_HASHTYPE_TEST(m, M_HASHTYPE_NONE) == 0) { 1388 pcbgroup = in6_pcbgroup_byhash(pcbinfo, M_HASHTYPE_GET(m), 1389 m->m_pkthdr.flowid); 1390 if (pcbgroup != NULL) 1391 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, 1392 fport, laddr, lport, lookupflags, ifp)); 1393 #ifndef RSS 1394 pcbgroup = in6_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr, 1395 fport); 1396 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, fport, 1397 laddr, lport, lookupflags, ifp)); 1398 #endif 1399 } 1400 #endif 1401 return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport, 1402 lookupflags, ifp, m->m_pkthdr.numa_domain)); 1403 } 1404 1405 void 1406 init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m, int srcordst) 1407 { 1408 struct ip6_hdr *ip; 1409 1410 ip = mtod(m, struct ip6_hdr *); 1411 bzero(sin6, sizeof(*sin6)); 1412 sin6->sin6_len = sizeof(*sin6); 1413 sin6->sin6_family = AF_INET6; 1414 sin6->sin6_addr = srcordst ? ip->ip6_dst : ip->ip6_src; 1415 1416 (void)sa6_recoverscope(sin6); /* XXX: should catch errors... */ 1417 1418 return; 1419 }
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