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) 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 error = in6_pcbbind(inp, (struct sockaddr *)0, cred); 441 if (error) 442 return (error); 443 } 444 inp->in6p_laddr = addr6; 445 } 446 inp->in6p_faddr = sin6->sin6_addr; 447 inp->inp_fport = sin6->sin6_port; 448 /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 449 inp->inp_flow &= ~IPV6_FLOWLABEL_MASK; 450 if (inp->inp_flags & IN6P_AUTOFLOWLABEL) 451 inp->inp_flow |= 452 (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK); 453 454 in_pcbrehash_mbuf(inp, m); 455 456 return (0); 457 } 458 459 int 460 in6_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred) 461 { 462 463 return (in6_pcbconnect_mbuf(inp, nam, cred, NULL)); 464 } 465 466 void 467 in6_pcbdisconnect(struct inpcb *inp) 468 { 469 470 INP_WLOCK_ASSERT(inp); 471 INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo); 472 473 bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr)); 474 inp->inp_fport = 0; 475 /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 476 inp->inp_flow &= ~IPV6_FLOWLABEL_MASK; 477 in_pcbrehash(inp); 478 } 479 480 struct sockaddr * 481 in6_sockaddr(in_port_t port, struct in6_addr *addr_p) 482 { 483 struct sockaddr_in6 *sin6; 484 485 sin6 = malloc(sizeof *sin6, M_SONAME, M_WAITOK); 486 bzero(sin6, sizeof *sin6); 487 sin6->sin6_family = AF_INET6; 488 sin6->sin6_len = sizeof(*sin6); 489 sin6->sin6_port = port; 490 sin6->sin6_addr = *addr_p; 491 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */ 492 493 return (struct sockaddr *)sin6; 494 } 495 496 struct sockaddr * 497 in6_v4mapsin6_sockaddr(in_port_t port, struct in_addr *addr_p) 498 { 499 struct sockaddr_in sin; 500 struct sockaddr_in6 *sin6_p; 501 502 bzero(&sin, sizeof sin); 503 sin.sin_family = AF_INET; 504 sin.sin_len = sizeof(sin); 505 sin.sin_port = port; 506 sin.sin_addr = *addr_p; 507 508 sin6_p = malloc(sizeof *sin6_p, M_SONAME, 509 M_WAITOK); 510 in6_sin_2_v4mapsin6(&sin, sin6_p); 511 512 return (struct sockaddr *)sin6_p; 513 } 514 515 int 516 in6_getsockaddr(struct socket *so, struct sockaddr **nam) 517 { 518 struct inpcb *inp; 519 struct in6_addr addr; 520 in_port_t port; 521 522 inp = sotoinpcb(so); 523 KASSERT(inp != NULL, ("in6_getsockaddr: inp == NULL")); 524 525 INP_RLOCK(inp); 526 port = inp->inp_lport; 527 addr = inp->in6p_laddr; 528 INP_RUNLOCK(inp); 529 530 *nam = in6_sockaddr(port, &addr); 531 return 0; 532 } 533 534 int 535 in6_getpeeraddr(struct socket *so, struct sockaddr **nam) 536 { 537 struct inpcb *inp; 538 struct in6_addr addr; 539 in_port_t port; 540 541 inp = sotoinpcb(so); 542 KASSERT(inp != NULL, ("in6_getpeeraddr: inp == NULL")); 543 544 INP_RLOCK(inp); 545 port = inp->inp_fport; 546 addr = inp->in6p_faddr; 547 INP_RUNLOCK(inp); 548 549 *nam = in6_sockaddr(port, &addr); 550 return 0; 551 } 552 553 int 554 in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam) 555 { 556 struct inpcb *inp; 557 int error; 558 559 inp = sotoinpcb(so); 560 KASSERT(inp != NULL, ("in6_mapped_sockaddr: inp == NULL")); 561 562 #ifdef INET 563 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) { 564 error = in_getsockaddr(so, nam); 565 if (error == 0) 566 in6_sin_2_v4mapsin6_in_sock(nam); 567 } else 568 #endif 569 { 570 /* scope issues will be handled in in6_getsockaddr(). */ 571 error = in6_getsockaddr(so, nam); 572 } 573 574 return error; 575 } 576 577 int 578 in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam) 579 { 580 struct inpcb *inp; 581 int error; 582 583 inp = sotoinpcb(so); 584 KASSERT(inp != NULL, ("in6_mapped_peeraddr: inp == NULL")); 585 586 #ifdef INET 587 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) { 588 error = in_getpeeraddr(so, nam); 589 if (error == 0) 590 in6_sin_2_v4mapsin6_in_sock(nam); 591 } else 592 #endif 593 /* scope issues will be handled in in6_getpeeraddr(). */ 594 error = in6_getpeeraddr(so, nam); 595 596 return error; 597 } 598 599 /* 600 * Pass some notification to all connections of a protocol 601 * associated with address dst. The local address and/or port numbers 602 * may be specified to limit the search. The "usual action" will be 603 * taken, depending on the ctlinput cmd. The caller must filter any 604 * cmds that are uninteresting (e.g., no error in the map). 605 * Call the protocol specific routine (if any) to report 606 * any errors for each matching socket. 607 */ 608 void 609 in6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr *dst, 610 u_int fport_arg, const struct sockaddr *src, u_int lport_arg, 611 int cmd, void *cmdarg, 612 struct inpcb *(*notify)(struct inpcb *, int)) 613 { 614 struct inpcb *inp, *inp_temp; 615 struct sockaddr_in6 sa6_src, *sa6_dst; 616 u_short fport = fport_arg, lport = lport_arg; 617 u_int32_t flowinfo; 618 int errno; 619 620 if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6) 621 return; 622 623 sa6_dst = (struct sockaddr_in6 *)dst; 624 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr)) 625 return; 626 627 /* 628 * note that src can be NULL when we get notify by local fragmentation. 629 */ 630 sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src; 631 flowinfo = sa6_src.sin6_flowinfo; 632 633 /* 634 * Redirects go to all references to the destination, 635 * and use in6_rtchange to invalidate the route cache. 636 * Dead host indications: also use in6_rtchange to invalidate 637 * the cache, and deliver the error to all the sockets. 638 * Otherwise, if we have knowledge of the local port and address, 639 * deliver only to that socket. 640 */ 641 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 642 fport = 0; 643 lport = 0; 644 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr)); 645 646 if (cmd != PRC_HOSTDEAD) 647 notify = in6_rtchange; 648 } 649 errno = inet6ctlerrmap[cmd]; 650 INP_INFO_WLOCK(pcbinfo); 651 CK_LIST_FOREACH_SAFE(inp, pcbinfo->ipi_listhead, inp_list, inp_temp) { 652 INP_WLOCK(inp); 653 if ((inp->inp_vflag & INP_IPV6) == 0) { 654 INP_WUNLOCK(inp); 655 continue; 656 } 657 658 /* 659 * If the error designates a new path MTU for a destination 660 * and the application (associated with this socket) wanted to 661 * know the value, notify. 662 * XXX: should we avoid to notify the value to TCP sockets? 663 */ 664 if (cmd == PRC_MSGSIZE && cmdarg != NULL) 665 ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst, 666 *(u_int32_t *)cmdarg); 667 668 /* 669 * Detect if we should notify the error. If no source and 670 * destination ports are specifed, but non-zero flowinfo and 671 * local address match, notify the error. This is the case 672 * when the error is delivered with an encrypted buffer 673 * by ESP. Otherwise, just compare addresses and ports 674 * as usual. 675 */ 676 if (lport == 0 && fport == 0 && flowinfo && 677 inp->inp_socket != NULL && 678 flowinfo == (inp->inp_flow & IPV6_FLOWLABEL_MASK) && 679 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr)) 680 goto do_notify; 681 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, 682 &sa6_dst->sin6_addr) || 683 inp->inp_socket == 0 || 684 (lport && inp->inp_lport != lport) || 685 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) && 686 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 687 &sa6_src.sin6_addr)) || 688 (fport && inp->inp_fport != fport)) { 689 INP_WUNLOCK(inp); 690 continue; 691 } 692 693 do_notify: 694 if (notify) { 695 if ((*notify)(inp, errno)) 696 INP_WUNLOCK(inp); 697 } else 698 INP_WUNLOCK(inp); 699 } 700 INP_INFO_WUNLOCK(pcbinfo); 701 } 702 703 /* 704 * Lookup a PCB based on the local address and port. Caller must hold the 705 * hash lock. No inpcb locks or references are acquired. 706 */ 707 struct inpcb * 708 in6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr, 709 u_short lport, int lookupflags, struct ucred *cred) 710 { 711 struct inpcb *inp; 712 int matchwild = 3, wildcard; 713 714 KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0, 715 ("%s: invalid lookup flags %d", __func__, lookupflags)); 716 717 INP_HASH_WLOCK_ASSERT(pcbinfo); 718 719 if ((lookupflags & INPLOOKUP_WILDCARD) == 0) { 720 struct inpcbhead *head; 721 /* 722 * Look for an unconnected (wildcard foreign addr) PCB that 723 * matches the local address and port we're looking for. 724 */ 725 head = &pcbinfo->ipi_hashbase[INP_PCBHASH( 726 INP6_PCBHASHKEY(&in6addr_any), lport, 0, 727 pcbinfo->ipi_hashmask)]; 728 CK_LIST_FOREACH(inp, head, inp_hash) { 729 /* XXX inp locking */ 730 if ((inp->inp_vflag & INP_IPV6) == 0) 731 continue; 732 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 733 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 734 inp->inp_lport == lport) { 735 /* Found. */ 736 if (cred == NULL || 737 prison_equal_ip6(cred->cr_prison, 738 inp->inp_cred->cr_prison)) 739 return (inp); 740 } 741 } 742 /* 743 * Not found. 744 */ 745 return (NULL); 746 } else { 747 struct inpcbporthead *porthash; 748 struct inpcbport *phd; 749 struct inpcb *match = NULL; 750 /* 751 * Best fit PCB lookup. 752 * 753 * First see if this local port is in use by looking on the 754 * port hash list. 755 */ 756 porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport, 757 pcbinfo->ipi_porthashmask)]; 758 CK_LIST_FOREACH(phd, porthash, phd_hash) { 759 if (phd->phd_port == lport) 760 break; 761 } 762 if (phd != NULL) { 763 /* 764 * Port is in use by one or more PCBs. Look for best 765 * fit. 766 */ 767 CK_LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) { 768 wildcard = 0; 769 if (cred != NULL && 770 !prison_equal_ip6(cred->cr_prison, 771 inp->inp_cred->cr_prison)) 772 continue; 773 /* XXX inp locking */ 774 if ((inp->inp_vflag & INP_IPV6) == 0) 775 continue; 776 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 777 wildcard++; 778 if (!IN6_IS_ADDR_UNSPECIFIED( 779 &inp->in6p_laddr)) { 780 if (IN6_IS_ADDR_UNSPECIFIED(laddr)) 781 wildcard++; 782 else if (!IN6_ARE_ADDR_EQUAL( 783 &inp->in6p_laddr, laddr)) 784 continue; 785 } else { 786 if (!IN6_IS_ADDR_UNSPECIFIED(laddr)) 787 wildcard++; 788 } 789 if (wildcard < matchwild) { 790 match = inp; 791 matchwild = wildcard; 792 if (matchwild == 0) 793 break; 794 } 795 } 796 } 797 return (match); 798 } 799 } 800 801 void 802 in6_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp) 803 { 804 struct inpcb *inp; 805 struct in6_multi *inm; 806 struct in6_mfilter *imf; 807 struct ip6_moptions *im6o; 808 809 INP_INFO_WLOCK(pcbinfo); 810 CK_LIST_FOREACH(inp, pcbinfo->ipi_listhead, inp_list) { 811 INP_WLOCK(inp); 812 if (__predict_false(inp->inp_flags2 & INP_FREED)) { 813 INP_WUNLOCK(inp); 814 continue; 815 } 816 im6o = inp->in6p_moptions; 817 if ((inp->inp_vflag & INP_IPV6) && im6o != NULL) { 818 /* 819 * Unselect the outgoing ifp for multicast if it 820 * is being detached. 821 */ 822 if (im6o->im6o_multicast_ifp == ifp) 823 im6o->im6o_multicast_ifp = NULL; 824 /* 825 * Drop multicast group membership if we joined 826 * through the interface being detached. 827 */ 828 restart: 829 IP6_MFILTER_FOREACH(imf, &im6o->im6o_head) { 830 if ((inm = imf->im6f_in6m) == NULL) 831 continue; 832 if (inm->in6m_ifp != ifp) 833 continue; 834 ip6_mfilter_remove(&im6o->im6o_head, imf); 835 IN6_MULTI_LOCK_ASSERT(); 836 in6_leavegroup_locked(inm, NULL); 837 ip6_mfilter_free(imf); 838 goto restart; 839 } 840 } 841 INP_WUNLOCK(inp); 842 } 843 INP_INFO_WUNLOCK(pcbinfo); 844 } 845 846 /* 847 * Check for alternatives when higher level complains 848 * about service problems. For now, invalidate cached 849 * routing information. If the route was created dynamically 850 * (by a redirect), time to try a default gateway again. 851 */ 852 void 853 in6_losing(struct inpcb *inp) 854 { 855 856 RO_INVALIDATE_CACHE(&inp->inp_route6); 857 } 858 859 /* 860 * After a routing change, flush old routing 861 * and allocate a (hopefully) better one. 862 */ 863 struct inpcb * 864 in6_rtchange(struct inpcb *inp, int errno __unused) 865 { 866 867 RO_INVALIDATE_CACHE(&inp->inp_route6); 868 return inp; 869 } 870 871 static struct inpcb * 872 in6_pcblookup_lbgroup(const struct inpcbinfo *pcbinfo, 873 const struct in6_addr *laddr, uint16_t lport, const struct in6_addr *faddr, 874 uint16_t fport, int lookupflags) 875 { 876 struct inpcb *local_wild; 877 const struct inpcblbgrouphead *hdr; 878 struct inpcblbgroup *grp; 879 uint32_t idx; 880 881 INP_HASH_LOCK_ASSERT(pcbinfo); 882 883 hdr = &pcbinfo->ipi_lbgrouphashbase[ 884 INP_PCBPORTHASH(lport, pcbinfo->ipi_lbgrouphashmask)]; 885 886 /* 887 * Order of socket selection: 888 * 1. non-wild. 889 * 2. wild (if lookupflags contains INPLOOKUP_WILDCARD). 890 * 891 * NOTE: 892 * - Load balanced group does not contain jailed sockets. 893 * - Load balanced does not contain IPv4 mapped INET6 wild sockets. 894 */ 895 local_wild = NULL; 896 CK_LIST_FOREACH(grp, hdr, il_list) { 897 #ifdef INET 898 if (!(grp->il_vflag & INP_IPV6)) 899 continue; 900 #endif 901 if (grp->il_lport != lport) 902 continue; 903 904 idx = INP_PCBLBGROUP_PKTHASH(INP6_PCBHASHKEY(faddr), lport, 905 fport) % grp->il_inpcnt; 906 if (IN6_ARE_ADDR_EQUAL(&grp->il6_laddr, laddr)) 907 return (grp->il_inp[idx]); 908 if (IN6_IS_ADDR_UNSPECIFIED(&grp->il6_laddr) && 909 (lookupflags & INPLOOKUP_WILDCARD) != 0) 910 local_wild = grp->il_inp[idx]; 911 } 912 return (local_wild); 913 } 914 915 #ifdef PCBGROUP 916 /* 917 * Lookup PCB in hash list, using pcbgroup tables. 918 */ 919 static struct inpcb * 920 in6_pcblookup_group(struct inpcbinfo *pcbinfo, struct inpcbgroup *pcbgroup, 921 struct in6_addr *faddr, u_int fport_arg, struct in6_addr *laddr, 922 u_int lport_arg, int lookupflags, struct ifnet *ifp) 923 { 924 struct inpcbhead *head; 925 struct inpcb *inp, *tmpinp; 926 u_short fport = fport_arg, lport = lport_arg; 927 bool locked; 928 929 /* 930 * First look for an exact match. 931 */ 932 tmpinp = NULL; 933 INP_GROUP_LOCK(pcbgroup); 934 head = &pcbgroup->ipg_hashbase[INP_PCBHASH( 935 INP6_PCBHASHKEY(faddr), lport, fport, pcbgroup->ipg_hashmask)]; 936 CK_LIST_FOREACH(inp, head, inp_pcbgrouphash) { 937 /* XXX inp locking */ 938 if ((inp->inp_vflag & INP_IPV6) == 0) 939 continue; 940 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) && 941 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 942 inp->inp_fport == fport && 943 inp->inp_lport == lport) { 944 /* 945 * XXX We should be able to directly return 946 * the inp here, without any checks. 947 * Well unless both bound with SO_REUSEPORT? 948 */ 949 if (prison_flag(inp->inp_cred, PR_IP6)) 950 goto found; 951 if (tmpinp == NULL) 952 tmpinp = inp; 953 } 954 } 955 if (tmpinp != NULL) { 956 inp = tmpinp; 957 goto found; 958 } 959 960 /* 961 * Then look for a wildcard match in the pcbgroup. 962 */ 963 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) { 964 struct inpcb *local_wild = NULL, *local_exact = NULL; 965 struct inpcb *jail_wild = NULL; 966 int injail; 967 968 /* 969 * Order of socket selection - we always prefer jails. 970 * 1. jailed, non-wild. 971 * 2. jailed, wild. 972 * 3. non-jailed, non-wild. 973 * 4. non-jailed, wild. 974 */ 975 head = &pcbgroup->ipg_hashbase[ 976 INP_PCBHASH(INADDR_ANY, lport, 0, pcbgroup->ipg_hashmask)]; 977 CK_LIST_FOREACH(inp, head, inp_pcbgrouphash) { 978 /* XXX inp locking */ 979 if ((inp->inp_vflag & INP_IPV6) == 0) 980 continue; 981 982 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 983 inp->inp_lport != lport) { 984 continue; 985 } 986 987 injail = prison_flag(inp->inp_cred, PR_IP6); 988 if (injail) { 989 if (prison_check_ip6(inp->inp_cred, 990 laddr) != 0) 991 continue; 992 } else { 993 if (local_exact != NULL) 994 continue; 995 } 996 997 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) { 998 if (injail) 999 goto found; 1000 else 1001 local_exact = inp; 1002 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 1003 if (injail) 1004 jail_wild = inp; 1005 else 1006 local_wild = inp; 1007 } 1008 } /* LIST_FOREACH */ 1009 1010 inp = jail_wild; 1011 if (inp == NULL) 1012 inp = jail_wild; 1013 if (inp == NULL) 1014 inp = local_exact; 1015 if (inp == NULL) 1016 inp = local_wild; 1017 if (inp != NULL) 1018 goto found; 1019 } 1020 1021 /* 1022 * Then look for a wildcard match, if requested. 1023 */ 1024 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) { 1025 struct inpcb *local_wild = NULL, *local_exact = NULL; 1026 struct inpcb *jail_wild = NULL; 1027 int injail; 1028 1029 /* 1030 * Order of socket selection - we always prefer jails. 1031 * 1. jailed, non-wild. 1032 * 2. jailed, wild. 1033 * 3. non-jailed, non-wild. 1034 * 4. non-jailed, wild. 1035 */ 1036 head = &pcbinfo->ipi_wildbase[INP_PCBHASH( 1037 INP6_PCBHASHKEY(&in6addr_any), lport, 0, 1038 pcbinfo->ipi_wildmask)]; 1039 CK_LIST_FOREACH(inp, head, inp_pcbgroup_wild) { 1040 /* XXX inp locking */ 1041 if ((inp->inp_vflag & INP_IPV6) == 0) 1042 continue; 1043 1044 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 1045 inp->inp_lport != lport) { 1046 continue; 1047 } 1048 1049 injail = prison_flag(inp->inp_cred, PR_IP6); 1050 if (injail) { 1051 if (prison_check_ip6(inp->inp_cred, 1052 laddr) != 0) 1053 continue; 1054 } else { 1055 if (local_exact != NULL) 1056 continue; 1057 } 1058 1059 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) { 1060 if (injail) 1061 goto found; 1062 else 1063 local_exact = inp; 1064 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 1065 if (injail) 1066 jail_wild = inp; 1067 else 1068 local_wild = inp; 1069 } 1070 } /* LIST_FOREACH */ 1071 1072 inp = jail_wild; 1073 if (inp == NULL) 1074 inp = jail_wild; 1075 if (inp == NULL) 1076 inp = local_exact; 1077 if (inp == NULL) 1078 inp = local_wild; 1079 if (inp != NULL) 1080 goto found; 1081 } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */ 1082 INP_GROUP_UNLOCK(pcbgroup); 1083 return (NULL); 1084 1085 found: 1086 if (lookupflags & INPLOOKUP_WLOCKPCB) 1087 locked = INP_TRY_WLOCK(inp); 1088 else if (lookupflags & INPLOOKUP_RLOCKPCB) 1089 locked = INP_TRY_RLOCK(inp); 1090 else 1091 panic("%s: locking buf", __func__); 1092 if (!locked) 1093 in_pcbref(inp); 1094 INP_GROUP_UNLOCK(pcbgroup); 1095 if (!locked) { 1096 if (lookupflags & INPLOOKUP_WLOCKPCB) { 1097 INP_WLOCK(inp); 1098 if (in_pcbrele_wlocked(inp)) 1099 return (NULL); 1100 } else { 1101 INP_RLOCK(inp); 1102 if (in_pcbrele_rlocked(inp)) 1103 return (NULL); 1104 } 1105 } 1106 #ifdef INVARIANTS 1107 if (lookupflags & INPLOOKUP_WLOCKPCB) 1108 INP_WLOCK_ASSERT(inp); 1109 else 1110 INP_RLOCK_ASSERT(inp); 1111 #endif 1112 return (inp); 1113 } 1114 #endif /* PCBGROUP */ 1115 1116 /* 1117 * Lookup PCB in hash list. 1118 */ 1119 static struct inpcb * 1120 in6_pcblookup_hash_locked(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, 1121 u_int fport_arg, struct in6_addr *laddr, u_int lport_arg, 1122 int lookupflags, struct ifnet *ifp) 1123 { 1124 struct inpcbhead *head; 1125 struct inpcb *inp, *tmpinp; 1126 u_short fport = fport_arg, lport = lport_arg; 1127 1128 KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0, 1129 ("%s: invalid lookup flags %d", __func__, lookupflags)); 1130 1131 INP_HASH_LOCK_ASSERT(pcbinfo); 1132 1133 /* 1134 * First look for an exact match. 1135 */ 1136 tmpinp = NULL; 1137 head = &pcbinfo->ipi_hashbase[INP_PCBHASH( 1138 INP6_PCBHASHKEY(faddr), lport, fport, pcbinfo->ipi_hashmask)]; 1139 CK_LIST_FOREACH(inp, head, inp_hash) { 1140 /* XXX inp locking */ 1141 if ((inp->inp_vflag & INP_IPV6) == 0) 1142 continue; 1143 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) && 1144 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 1145 inp->inp_fport == fport && 1146 inp->inp_lport == lport) { 1147 /* 1148 * XXX We should be able to directly return 1149 * the inp here, without any checks. 1150 * Well unless both bound with SO_REUSEPORT? 1151 */ 1152 if (prison_flag(inp->inp_cred, PR_IP6)) 1153 return (inp); 1154 if (tmpinp == NULL) 1155 tmpinp = inp; 1156 } 1157 } 1158 if (tmpinp != NULL) 1159 return (tmpinp); 1160 1161 /* 1162 * Then look in lb group (for wildcard match). 1163 */ 1164 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) { 1165 inp = in6_pcblookup_lbgroup(pcbinfo, laddr, lport, faddr, 1166 fport, lookupflags); 1167 if (inp != NULL) 1168 return (inp); 1169 } 1170 1171 /* 1172 * Then look for a wildcard match, if requested. 1173 */ 1174 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) { 1175 struct inpcb *local_wild = NULL, *local_exact = NULL; 1176 struct inpcb *jail_wild = NULL; 1177 int injail; 1178 1179 /* 1180 * Order of socket selection - we always prefer jails. 1181 * 1. jailed, non-wild. 1182 * 2. jailed, wild. 1183 * 3. non-jailed, non-wild. 1184 * 4. non-jailed, wild. 1185 */ 1186 head = &pcbinfo->ipi_hashbase[INP_PCBHASH( 1187 INP6_PCBHASHKEY(&in6addr_any), lport, 0, 1188 pcbinfo->ipi_hashmask)]; 1189 CK_LIST_FOREACH(inp, head, inp_hash) { 1190 /* XXX inp locking */ 1191 if ((inp->inp_vflag & INP_IPV6) == 0) 1192 continue; 1193 1194 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 1195 inp->inp_lport != lport) { 1196 continue; 1197 } 1198 1199 injail = prison_flag(inp->inp_cred, PR_IP6); 1200 if (injail) { 1201 if (prison_check_ip6(inp->inp_cred, 1202 laddr) != 0) 1203 continue; 1204 } else { 1205 if (local_exact != NULL) 1206 continue; 1207 } 1208 1209 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) { 1210 if (injail) 1211 return (inp); 1212 else 1213 local_exact = inp; 1214 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 1215 if (injail) 1216 jail_wild = inp; 1217 else 1218 local_wild = inp; 1219 } 1220 } /* LIST_FOREACH */ 1221 1222 if (jail_wild != NULL) 1223 return (jail_wild); 1224 if (local_exact != NULL) 1225 return (local_exact); 1226 if (local_wild != NULL) 1227 return (local_wild); 1228 } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */ 1229 1230 /* 1231 * Not found. 1232 */ 1233 return (NULL); 1234 } 1235 1236 /* 1237 * Lookup PCB in hash list, using pcbinfo tables. This variation locks the 1238 * hash list lock, and will return the inpcb locked (i.e., requires 1239 * INPLOOKUP_LOCKPCB). 1240 */ 1241 static struct inpcb * 1242 in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, 1243 u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags, 1244 struct ifnet *ifp) 1245 { 1246 struct inpcb *inp; 1247 1248 INP_HASH_RLOCK(pcbinfo); 1249 inp = in6_pcblookup_hash_locked(pcbinfo, faddr, fport, laddr, lport, 1250 (lookupflags & ~(INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)), ifp); 1251 if (inp != NULL) { 1252 if (lookupflags & INPLOOKUP_WLOCKPCB) { 1253 INP_WLOCK(inp); 1254 if (__predict_false(inp->inp_flags2 & INP_FREED)) { 1255 INP_WUNLOCK(inp); 1256 inp = NULL; 1257 } 1258 } else if (lookupflags & INPLOOKUP_RLOCKPCB) { 1259 INP_RLOCK(inp); 1260 if (__predict_false(inp->inp_flags2 & INP_FREED)) { 1261 INP_RUNLOCK(inp); 1262 inp = NULL; 1263 } 1264 } else 1265 panic("%s: locking bug", __func__); 1266 #ifdef INVARIANTS 1267 if (inp != NULL) { 1268 if (lookupflags & INPLOOKUP_WLOCKPCB) 1269 INP_WLOCK_ASSERT(inp); 1270 else 1271 INP_RLOCK_ASSERT(inp); 1272 } 1273 #endif 1274 } 1275 INP_HASH_RUNLOCK(pcbinfo); 1276 return (inp); 1277 } 1278 1279 /* 1280 * Public inpcb lookup routines, accepting a 4-tuple, and optionally, an mbuf 1281 * from which a pre-calculated hash value may be extracted. 1282 * 1283 * Possibly more of this logic should be in in6_pcbgroup.c. 1284 */ 1285 struct inpcb * 1286 in6_pcblookup(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, u_int fport, 1287 struct in6_addr *laddr, u_int lport, int lookupflags, struct ifnet *ifp) 1288 { 1289 #if defined(PCBGROUP) && !defined(RSS) 1290 struct inpcbgroup *pcbgroup; 1291 #endif 1292 1293 KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0, 1294 ("%s: invalid lookup flags %d", __func__, lookupflags)); 1295 KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0, 1296 ("%s: LOCKPCB not set", __func__)); 1297 1298 /* 1299 * When not using RSS, use connection groups in preference to the 1300 * reservation table when looking up 4-tuples. When using RSS, just 1301 * use the reservation table, due to the cost of the Toeplitz hash 1302 * in software. 1303 * 1304 * XXXRW: This policy belongs in the pcbgroup code, as in principle 1305 * we could be doing RSS with a non-Toeplitz hash that is affordable 1306 * in software. 1307 */ 1308 #if defined(PCBGROUP) && !defined(RSS) 1309 if (in_pcbgroup_enabled(pcbinfo)) { 1310 pcbgroup = in6_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr, 1311 fport); 1312 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, fport, 1313 laddr, lport, lookupflags, ifp)); 1314 } 1315 #endif 1316 return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport, 1317 lookupflags, ifp)); 1318 } 1319 1320 struct inpcb * 1321 in6_pcblookup_mbuf(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, 1322 u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags, 1323 struct ifnet *ifp, struct mbuf *m) 1324 { 1325 #ifdef PCBGROUP 1326 struct inpcbgroup *pcbgroup; 1327 #endif 1328 1329 KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0, 1330 ("%s: invalid lookup flags %d", __func__, lookupflags)); 1331 KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0, 1332 ("%s: LOCKPCB not set", __func__)); 1333 1334 #ifdef PCBGROUP 1335 /* 1336 * If we can use a hardware-generated hash to look up the connection 1337 * group, use that connection group to find the inpcb. Otherwise 1338 * fall back on a software hash -- or the reservation table if we're 1339 * using RSS. 1340 * 1341 * XXXRW: As above, that policy belongs in the pcbgroup code. 1342 */ 1343 if (in_pcbgroup_enabled(pcbinfo) && 1344 M_HASHTYPE_TEST(m, M_HASHTYPE_NONE) == 0) { 1345 pcbgroup = in6_pcbgroup_byhash(pcbinfo, M_HASHTYPE_GET(m), 1346 m->m_pkthdr.flowid); 1347 if (pcbgroup != NULL) 1348 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, 1349 fport, laddr, lport, lookupflags, ifp)); 1350 #ifndef RSS 1351 pcbgroup = in6_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr, 1352 fport); 1353 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, fport, 1354 laddr, lport, lookupflags, ifp)); 1355 #endif 1356 } 1357 #endif 1358 return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport, 1359 lookupflags, ifp)); 1360 } 1361 1362 void 1363 init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m, int srcordst) 1364 { 1365 struct ip6_hdr *ip; 1366 1367 ip = mtod(m, struct ip6_hdr *); 1368 bzero(sin6, sizeof(*sin6)); 1369 sin6->sin6_len = sizeof(*sin6); 1370 sin6->sin6_family = AF_INET6; 1371 sin6->sin6_addr = srcordst ? ip->ip6_dst : ip->ip6_src; 1372 1373 (void)sa6_recoverscope(sin6); /* XXX: should catch errors... */ 1374 1375 return; 1376 } 1377