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 INP_WLOCK_ASSERT(inp); 129 INP_HASH_WLOCK_ASSERT(pcbinfo); 130 131 if (CK_STAILQ_EMPTY(&V_in6_ifaddrhead)) /* XXX broken! */ 132 return (EADDRNOTAVAIL); 133 if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) 134 return (EINVAL); 135 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) == 0) 136 lookupflags = INPLOOKUP_WILDCARD; 137 if (nam == NULL) { 138 if ((error = prison_local_ip6(cred, &inp->in6p_laddr, 139 ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0) 140 return (error); 141 } else { 142 sin6 = (struct sockaddr_in6 *)nam; 143 if (nam->sa_len != sizeof(*sin6)) 144 return (EINVAL); 145 /* 146 * family check. 147 */ 148 if (nam->sa_family != AF_INET6) 149 return (EAFNOSUPPORT); 150 151 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0) 152 return(error); 153 154 if ((error = prison_local_ip6(cred, &sin6->sin6_addr, 155 ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0) 156 return (error); 157 158 lport = sin6->sin6_port; 159 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 160 /* 161 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 162 * allow compepte duplication of binding if 163 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 164 * and a multicast address is bound on both 165 * new and duplicated sockets. 166 */ 167 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) != 0) 168 reuseport = SO_REUSEADDR|SO_REUSEPORT; 169 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 170 struct ifaddr *ifa; 171 172 sin6->sin6_port = 0; /* yech... */ 173 NET_EPOCH_ENTER(); 174 if ((ifa = ifa_ifwithaddr((struct sockaddr *)sin6)) == 175 NULL && 176 (inp->inp_flags & INP_BINDANY) == 0) { 177 NET_EPOCH_EXIT(); 178 return (EADDRNOTAVAIL); 179 } 180 181 /* 182 * XXX: bind to an anycast address might accidentally 183 * cause sending a packet with anycast source address. 184 * We should allow to bind to a deprecated address, since 185 * the application dares to use it. 186 */ 187 if (ifa != NULL && 188 ((struct in6_ifaddr *)ifa)->ia6_flags & 189 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) { 190 NET_EPOCH_EXIT(); 191 return (EADDRNOTAVAIL); 192 } 193 NET_EPOCH_EXIT(); 194 } 195 if (lport) { 196 struct inpcb *t; 197 struct tcptw *tw; 198 199 /* GROSS */ 200 if (ntohs(lport) <= V_ipport_reservedhigh && 201 ntohs(lport) >= V_ipport_reservedlow && 202 priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 203 0)) 204 return (EACCES); 205 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) && 206 priv_check_cred(inp->inp_cred, 207 PRIV_NETINET_REUSEPORT, 0) != 0) { 208 t = in6_pcblookup_local(pcbinfo, 209 &sin6->sin6_addr, lport, 210 INPLOOKUP_WILDCARD, cred); 211 if (t && 212 ((inp->inp_flags2 & INP_BINDMULTI) == 0) && 213 ((t->inp_flags & INP_TIMEWAIT) == 0) && 214 (so->so_type != SOCK_STREAM || 215 IN6_IS_ADDR_UNSPECIFIED(&t->in6p_faddr)) && 216 (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 217 !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) || 218 (t->inp_flags2 & INP_REUSEPORT) == 0) && 219 (inp->inp_cred->cr_uid != 220 t->inp_cred->cr_uid)) 221 return (EADDRINUSE); 222 223 /* 224 * If the socket is a BINDMULTI socket, then 225 * the credentials need to match and the 226 * original socket also has to have been bound 227 * with BINDMULTI. 228 */ 229 if (t && (! in_pcbbind_check_bindmulti(inp, t))) 230 return (EADDRINUSE); 231 232 #ifdef INET 233 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 && 234 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 235 struct sockaddr_in sin; 236 237 in6_sin6_2_sin(&sin, sin6); 238 t = in_pcblookup_local(pcbinfo, 239 sin.sin_addr, lport, 240 INPLOOKUP_WILDCARD, cred); 241 if (t && 242 ((inp->inp_flags2 & INP_BINDMULTI) == 0) && 243 ((t->inp_flags & 244 INP_TIMEWAIT) == 0) && 245 (so->so_type != SOCK_STREAM || 246 ntohl(t->inp_faddr.s_addr) == 247 INADDR_ANY) && 248 (inp->inp_cred->cr_uid != 249 t->inp_cred->cr_uid)) 250 return (EADDRINUSE); 251 252 if (t && (! in_pcbbind_check_bindmulti(inp, t))) 253 return (EADDRINUSE); 254 } 255 #endif 256 } 257 t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr, 258 lport, lookupflags, cred); 259 if (t && (t->inp_flags & INP_TIMEWAIT)) { 260 /* 261 * XXXRW: If an incpb has had its timewait 262 * state recycled, we treat the address as 263 * being in use (for now). This is better 264 * than a panic, but not desirable. 265 */ 266 tw = intotw(t); 267 if (tw == NULL || 268 (reuseport & tw->tw_so_options) == 0) 269 return (EADDRINUSE); 270 } else if (t && (reuseport & inp_so_options(t)) == 0) { 271 return (EADDRINUSE); 272 } 273 #ifdef INET 274 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 && 275 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 276 struct sockaddr_in sin; 277 278 in6_sin6_2_sin(&sin, sin6); 279 t = in_pcblookup_local(pcbinfo, sin.sin_addr, 280 lport, lookupflags, cred); 281 if (t && t->inp_flags & INP_TIMEWAIT) { 282 tw = intotw(t); 283 if (tw == NULL) 284 return (EADDRINUSE); 285 if ((reuseport & tw->tw_so_options) == 0 286 && (ntohl(t->inp_laddr.s_addr) != 287 INADDR_ANY || ((inp->inp_vflag & 288 INP_IPV6PROTO) == 289 (t->inp_vflag & INP_IPV6PROTO)))) 290 return (EADDRINUSE); 291 } else if (t && 292 (reuseport & inp_so_options(t)) == 0 && 293 (ntohl(t->inp_laddr.s_addr) != INADDR_ANY || 294 (t->inp_vflag & INP_IPV6PROTO) != 0)) 295 return (EADDRINUSE); 296 } 297 #endif 298 } 299 inp->in6p_laddr = sin6->sin6_addr; 300 } 301 if (lport == 0) { 302 if ((error = in6_pcbsetport(&inp->in6p_laddr, inp, cred)) != 0) { 303 /* Undo an address bind that may have occurred. */ 304 inp->in6p_laddr = in6addr_any; 305 return (error); 306 } 307 } else { 308 inp->inp_lport = lport; 309 if (in_pcbinshash(inp) != 0) { 310 inp->in6p_laddr = in6addr_any; 311 inp->inp_lport = 0; 312 return (EAGAIN); 313 } 314 } 315 return (0); 316 } 317 318 /* 319 * Transform old in6_pcbconnect() into an inner subroutine for new 320 * in6_pcbconnect(): Do some validity-checking on the remote 321 * address (in mbuf 'nam') and then determine local host address 322 * (i.e., which interface) to use to access that remote host. 323 * 324 * This preserves definition of in6_pcbconnect(), while supporting a 325 * slightly different version for T/TCP. (This is more than 326 * a bit of a kludge, but cleaning up the internal interfaces would 327 * have forced minor changes in every protocol). 328 */ 329 static int 330 in6_pcbladdr(struct inpcb *inp, struct sockaddr *nam, 331 struct in6_addr *plocal_addr6) 332 { 333 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 334 int error = 0; 335 int scope_ambiguous = 0; 336 struct in6_addr in6a; 337 338 INP_WLOCK_ASSERT(inp); 339 INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo); /* XXXRW: why? */ 340 341 if (nam->sa_len != sizeof (*sin6)) 342 return (EINVAL); 343 if (sin6->sin6_family != AF_INET6) 344 return (EAFNOSUPPORT); 345 if (sin6->sin6_port == 0) 346 return (EADDRNOTAVAIL); 347 348 if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone) 349 scope_ambiguous = 1; 350 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0) 351 return(error); 352 353 if (!CK_STAILQ_EMPTY(&V_in6_ifaddrhead)) { 354 /* 355 * If the destination address is UNSPECIFIED addr, 356 * use the loopback addr, e.g ::1. 357 */ 358 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 359 sin6->sin6_addr = in6addr_loopback; 360 } 361 if ((error = prison_remote_ip6(inp->inp_cred, &sin6->sin6_addr)) != 0) 362 return (error); 363 364 error = in6_selectsrc_socket(sin6, inp->in6p_outputopts, 365 inp, inp->inp_cred, scope_ambiguous, &in6a, NULL); 366 if (error) 367 return (error); 368 369 /* 370 * Do not update this earlier, in case we return with an error. 371 * 372 * XXX: this in6_selectsrc_socket result might replace the bound local 373 * address with the address specified by setsockopt(IPV6_PKTINFO). 374 * Is it the intended behavior? 375 */ 376 *plocal_addr6 = in6a; 377 378 /* 379 * Don't do pcblookup call here; return interface in 380 * plocal_addr6 381 * and exit to caller, that will do the lookup. 382 */ 383 384 return (0); 385 } 386 387 /* 388 * Outer subroutine: 389 * Connect from a socket to a specified address. 390 * Both address and port must be specified in argument sin. 391 * If don't have a local address for this socket yet, 392 * then pick one. 393 */ 394 int 395 in6_pcbconnect_mbuf(struct inpcb *inp, struct sockaddr *nam, 396 struct ucred *cred, struct mbuf *m) 397 { 398 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 399 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 400 struct in6_addr addr6; 401 int error; 402 403 INP_WLOCK_ASSERT(inp); 404 INP_HASH_WLOCK_ASSERT(pcbinfo); 405 406 /* 407 * Call inner routine, to assign local interface address. 408 * in6_pcbladdr() may automatically fill in sin6_scope_id. 409 */ 410 if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0) 411 return (error); 412 413 if (in6_pcblookup_hash_locked(pcbinfo, &sin6->sin6_addr, 414 sin6->sin6_port, 415 IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) 416 ? &addr6 : &inp->in6p_laddr, 417 inp->inp_lport, 0, NULL) != NULL) { 418 return (EADDRINUSE); 419 } 420 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 421 if (inp->inp_lport == 0) { 422 error = in6_pcbbind(inp, (struct sockaddr *)0, cred); 423 if (error) 424 return (error); 425 } 426 inp->in6p_laddr = addr6; 427 } 428 inp->in6p_faddr = sin6->sin6_addr; 429 inp->inp_fport = sin6->sin6_port; 430 /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 431 inp->inp_flow &= ~IPV6_FLOWLABEL_MASK; 432 if (inp->inp_flags & IN6P_AUTOFLOWLABEL) 433 inp->inp_flow |= 434 (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK); 435 436 in_pcbrehash_mbuf(inp, m); 437 438 return (0); 439 } 440 441 int 442 in6_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred) 443 { 444 445 return (in6_pcbconnect_mbuf(inp, nam, cred, NULL)); 446 } 447 448 void 449 in6_pcbdisconnect(struct inpcb *inp) 450 { 451 452 INP_WLOCK_ASSERT(inp); 453 INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo); 454 455 bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr)); 456 inp->inp_fport = 0; 457 /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 458 inp->inp_flow &= ~IPV6_FLOWLABEL_MASK; 459 in_pcbrehash(inp); 460 } 461 462 struct sockaddr * 463 in6_sockaddr(in_port_t port, struct in6_addr *addr_p) 464 { 465 struct sockaddr_in6 *sin6; 466 467 sin6 = malloc(sizeof *sin6, M_SONAME, M_WAITOK); 468 bzero(sin6, sizeof *sin6); 469 sin6->sin6_family = AF_INET6; 470 sin6->sin6_len = sizeof(*sin6); 471 sin6->sin6_port = port; 472 sin6->sin6_addr = *addr_p; 473 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */ 474 475 return (struct sockaddr *)sin6; 476 } 477 478 struct sockaddr * 479 in6_v4mapsin6_sockaddr(in_port_t port, struct in_addr *addr_p) 480 { 481 struct sockaddr_in sin; 482 struct sockaddr_in6 *sin6_p; 483 484 bzero(&sin, sizeof sin); 485 sin.sin_family = AF_INET; 486 sin.sin_len = sizeof(sin); 487 sin.sin_port = port; 488 sin.sin_addr = *addr_p; 489 490 sin6_p = malloc(sizeof *sin6_p, M_SONAME, 491 M_WAITOK); 492 in6_sin_2_v4mapsin6(&sin, sin6_p); 493 494 return (struct sockaddr *)sin6_p; 495 } 496 497 int 498 in6_getsockaddr(struct socket *so, struct sockaddr **nam) 499 { 500 struct inpcb *inp; 501 struct in6_addr addr; 502 in_port_t port; 503 504 inp = sotoinpcb(so); 505 KASSERT(inp != NULL, ("in6_getsockaddr: inp == NULL")); 506 507 INP_RLOCK(inp); 508 port = inp->inp_lport; 509 addr = inp->in6p_laddr; 510 INP_RUNLOCK(inp); 511 512 *nam = in6_sockaddr(port, &addr); 513 return 0; 514 } 515 516 int 517 in6_getpeeraddr(struct socket *so, struct sockaddr **nam) 518 { 519 struct inpcb *inp; 520 struct in6_addr addr; 521 in_port_t port; 522 523 inp = sotoinpcb(so); 524 KASSERT(inp != NULL, ("in6_getpeeraddr: inp == NULL")); 525 526 INP_RLOCK(inp); 527 port = inp->inp_fport; 528 addr = inp->in6p_faddr; 529 INP_RUNLOCK(inp); 530 531 *nam = in6_sockaddr(port, &addr); 532 return 0; 533 } 534 535 int 536 in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam) 537 { 538 struct inpcb *inp; 539 int error; 540 541 inp = sotoinpcb(so); 542 KASSERT(inp != NULL, ("in6_mapped_sockaddr: inp == NULL")); 543 544 #ifdef INET 545 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) { 546 error = in_getsockaddr(so, nam); 547 if (error == 0) 548 in6_sin_2_v4mapsin6_in_sock(nam); 549 } else 550 #endif 551 { 552 /* scope issues will be handled in in6_getsockaddr(). */ 553 error = in6_getsockaddr(so, nam); 554 } 555 556 return error; 557 } 558 559 int 560 in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam) 561 { 562 struct inpcb *inp; 563 int error; 564 565 inp = sotoinpcb(so); 566 KASSERT(inp != NULL, ("in6_mapped_peeraddr: inp == NULL")); 567 568 #ifdef INET 569 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) { 570 error = in_getpeeraddr(so, nam); 571 if (error == 0) 572 in6_sin_2_v4mapsin6_in_sock(nam); 573 } else 574 #endif 575 /* scope issues will be handled in in6_getpeeraddr(). */ 576 error = in6_getpeeraddr(so, nam); 577 578 return error; 579 } 580 581 /* 582 * Pass some notification to all connections of a protocol 583 * associated with address dst. The local address and/or port numbers 584 * may be specified to limit the search. The "usual action" will be 585 * taken, depending on the ctlinput cmd. The caller must filter any 586 * cmds that are uninteresting (e.g., no error in the map). 587 * Call the protocol specific routine (if any) to report 588 * any errors for each matching socket. 589 */ 590 void 591 in6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr *dst, 592 u_int fport_arg, const struct sockaddr *src, u_int lport_arg, 593 int cmd, void *cmdarg, 594 struct inpcb *(*notify)(struct inpcb *, int)) 595 { 596 struct inpcb *inp, *inp_temp; 597 struct sockaddr_in6 sa6_src, *sa6_dst; 598 u_short fport = fport_arg, lport = lport_arg; 599 u_int32_t flowinfo; 600 int errno; 601 602 if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6) 603 return; 604 605 sa6_dst = (struct sockaddr_in6 *)dst; 606 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr)) 607 return; 608 609 /* 610 * note that src can be NULL when we get notify by local fragmentation. 611 */ 612 sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src; 613 flowinfo = sa6_src.sin6_flowinfo; 614 615 /* 616 * Redirects go to all references to the destination, 617 * and use in6_rtchange to invalidate the route cache. 618 * Dead host indications: also use in6_rtchange to invalidate 619 * the cache, and deliver the error to all the sockets. 620 * Otherwise, if we have knowledge of the local port and address, 621 * deliver only to that socket. 622 */ 623 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 624 fport = 0; 625 lport = 0; 626 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr)); 627 628 if (cmd != PRC_HOSTDEAD) 629 notify = in6_rtchange; 630 } 631 errno = inet6ctlerrmap[cmd]; 632 INP_INFO_WLOCK(pcbinfo); 633 LIST_FOREACH_SAFE(inp, pcbinfo->ipi_listhead, inp_list, inp_temp) { 634 INP_WLOCK(inp); 635 if ((inp->inp_vflag & INP_IPV6) == 0) { 636 INP_WUNLOCK(inp); 637 continue; 638 } 639 640 /* 641 * If the error designates a new path MTU for a destination 642 * and the application (associated with this socket) wanted to 643 * know the value, notify. 644 * XXX: should we avoid to notify the value to TCP sockets? 645 */ 646 if (cmd == PRC_MSGSIZE && cmdarg != NULL) 647 ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst, 648 *(u_int32_t *)cmdarg); 649 650 /* 651 * Detect if we should notify the error. If no source and 652 * destination ports are specifed, but non-zero flowinfo and 653 * local address match, notify the error. This is the case 654 * when the error is delivered with an encrypted buffer 655 * by ESP. Otherwise, just compare addresses and ports 656 * as usual. 657 */ 658 if (lport == 0 && fport == 0 && flowinfo && 659 inp->inp_socket != NULL && 660 flowinfo == (inp->inp_flow & IPV6_FLOWLABEL_MASK) && 661 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr)) 662 goto do_notify; 663 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, 664 &sa6_dst->sin6_addr) || 665 inp->inp_socket == 0 || 666 (lport && inp->inp_lport != lport) || 667 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) && 668 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 669 &sa6_src.sin6_addr)) || 670 (fport && inp->inp_fport != fport)) { 671 INP_WUNLOCK(inp); 672 continue; 673 } 674 675 do_notify: 676 if (notify) { 677 if ((*notify)(inp, errno)) 678 INP_WUNLOCK(inp); 679 } else 680 INP_WUNLOCK(inp); 681 } 682 INP_INFO_WUNLOCK(pcbinfo); 683 } 684 685 /* 686 * Lookup a PCB based on the local address and port. Caller must hold the 687 * hash lock. No inpcb locks or references are acquired. 688 */ 689 struct inpcb * 690 in6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr, 691 u_short lport, int lookupflags, struct ucred *cred) 692 { 693 struct inpcb *inp; 694 int matchwild = 3, wildcard; 695 696 KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0, 697 ("%s: invalid lookup flags %d", __func__, lookupflags)); 698 699 INP_HASH_WLOCK_ASSERT(pcbinfo); 700 701 if ((lookupflags & INPLOOKUP_WILDCARD) == 0) { 702 struct inpcbhead *head; 703 /* 704 * Look for an unconnected (wildcard foreign addr) PCB that 705 * matches the local address and port we're looking for. 706 */ 707 head = &pcbinfo->ipi_hashbase[INP_PCBHASH( 708 INP6_PCBHASHKEY(&in6addr_any), lport, 0, 709 pcbinfo->ipi_hashmask)]; 710 LIST_FOREACH(inp, head, inp_hash) { 711 /* XXX inp locking */ 712 if ((inp->inp_vflag & INP_IPV6) == 0) 713 continue; 714 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 715 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 716 inp->inp_lport == lport) { 717 /* Found. */ 718 if (cred == NULL || 719 prison_equal_ip6(cred->cr_prison, 720 inp->inp_cred->cr_prison)) 721 return (inp); 722 } 723 } 724 /* 725 * Not found. 726 */ 727 return (NULL); 728 } else { 729 struct inpcbporthead *porthash; 730 struct inpcbport *phd; 731 struct inpcb *match = NULL; 732 /* 733 * Best fit PCB lookup. 734 * 735 * First see if this local port is in use by looking on the 736 * port hash list. 737 */ 738 porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport, 739 pcbinfo->ipi_porthashmask)]; 740 LIST_FOREACH(phd, porthash, phd_hash) { 741 if (phd->phd_port == lport) 742 break; 743 } 744 if (phd != NULL) { 745 /* 746 * Port is in use by one or more PCBs. Look for best 747 * fit. 748 */ 749 LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) { 750 wildcard = 0; 751 if (cred != NULL && 752 !prison_equal_ip6(cred->cr_prison, 753 inp->inp_cred->cr_prison)) 754 continue; 755 /* XXX inp locking */ 756 if ((inp->inp_vflag & INP_IPV6) == 0) 757 continue; 758 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 759 wildcard++; 760 if (!IN6_IS_ADDR_UNSPECIFIED( 761 &inp->in6p_laddr)) { 762 if (IN6_IS_ADDR_UNSPECIFIED(laddr)) 763 wildcard++; 764 else if (!IN6_ARE_ADDR_EQUAL( 765 &inp->in6p_laddr, laddr)) 766 continue; 767 } else { 768 if (!IN6_IS_ADDR_UNSPECIFIED(laddr)) 769 wildcard++; 770 } 771 if (wildcard < matchwild) { 772 match = inp; 773 matchwild = wildcard; 774 if (matchwild == 0) 775 break; 776 } 777 } 778 } 779 return (match); 780 } 781 } 782 783 void 784 in6_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp) 785 { 786 struct inpcb *in6p; 787 struct ip6_moptions *im6o; 788 int i, gap; 789 790 INP_INFO_WLOCK(pcbinfo); 791 LIST_FOREACH(in6p, pcbinfo->ipi_listhead, inp_list) { 792 INP_WLOCK(in6p); 793 im6o = in6p->in6p_moptions; 794 if ((in6p->inp_vflag & INP_IPV6) && im6o != NULL) { 795 /* 796 * Unselect the outgoing ifp for multicast if it 797 * is being detached. 798 */ 799 if (im6o->im6o_multicast_ifp == ifp) 800 im6o->im6o_multicast_ifp = NULL; 801 /* 802 * Drop multicast group membership if we joined 803 * through the interface being detached. 804 */ 805 gap = 0; 806 for (i = 0; i < im6o->im6o_num_memberships; i++) { 807 if (im6o->im6o_membership[i]->in6m_ifp == 808 ifp) { 809 in6_leavegroup(im6o->im6o_membership[i], NULL); 810 gap++; 811 } else if (gap != 0) { 812 im6o->im6o_membership[i - gap] = 813 im6o->im6o_membership[i]; 814 } 815 } 816 im6o->im6o_num_memberships -= gap; 817 } 818 INP_WUNLOCK(in6p); 819 } 820 INP_INFO_WUNLOCK(pcbinfo); 821 } 822 823 /* 824 * Check for alternatives when higher level complains 825 * about service problems. For now, invalidate cached 826 * routing information. If the route was created dynamically 827 * (by a redirect), time to try a default gateway again. 828 */ 829 void 830 in6_losing(struct inpcb *in6p) 831 { 832 833 if (in6p->inp_route6.ro_rt) { 834 RTFREE(in6p->inp_route6.ro_rt); 835 in6p->inp_route6.ro_rt = (struct rtentry *)NULL; 836 } 837 if (in6p->inp_route.ro_lle) 838 LLE_FREE(in6p->inp_route.ro_lle); /* zeros ro_lle */ 839 return; 840 } 841 842 /* 843 * After a routing change, flush old routing 844 * and allocate a (hopefully) better one. 845 */ 846 struct inpcb * 847 in6_rtchange(struct inpcb *inp, int errno) 848 { 849 850 if (inp->inp_route6.ro_rt) { 851 RTFREE(inp->inp_route6.ro_rt); 852 inp->inp_route6.ro_rt = (struct rtentry *)NULL; 853 } 854 if (inp->inp_route.ro_lle) 855 LLE_FREE(inp->inp_route.ro_lle); /* zeros ro_lle */ 856 return inp; 857 } 858 859 #ifdef PCBGROUP 860 /* 861 * Lookup PCB in hash list, using pcbgroup tables. 862 */ 863 static struct inpcb * 864 in6_pcblookup_group(struct inpcbinfo *pcbinfo, struct inpcbgroup *pcbgroup, 865 struct in6_addr *faddr, u_int fport_arg, struct in6_addr *laddr, 866 u_int lport_arg, int lookupflags, struct ifnet *ifp) 867 { 868 struct inpcbhead *head; 869 struct inpcb *inp, *tmpinp; 870 u_short fport = fport_arg, lport = lport_arg; 871 bool locked; 872 873 /* 874 * First look for an exact match. 875 */ 876 tmpinp = NULL; 877 INP_GROUP_LOCK(pcbgroup); 878 head = &pcbgroup->ipg_hashbase[INP_PCBHASH( 879 INP6_PCBHASHKEY(faddr), lport, fport, pcbgroup->ipg_hashmask)]; 880 LIST_FOREACH(inp, head, inp_pcbgrouphash) { 881 /* XXX inp locking */ 882 if ((inp->inp_vflag & INP_IPV6) == 0) 883 continue; 884 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) && 885 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 886 inp->inp_fport == fport && 887 inp->inp_lport == lport) { 888 /* 889 * XXX We should be able to directly return 890 * the inp here, without any checks. 891 * Well unless both bound with SO_REUSEPORT? 892 */ 893 if (prison_flag(inp->inp_cred, PR_IP6)) 894 goto found; 895 if (tmpinp == NULL) 896 tmpinp = inp; 897 } 898 } 899 if (tmpinp != NULL) { 900 inp = tmpinp; 901 goto found; 902 } 903 904 /* 905 * Then look for a wildcard match in the pcbgroup. 906 */ 907 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) { 908 struct inpcb *local_wild = NULL, *local_exact = NULL; 909 struct inpcb *jail_wild = NULL; 910 int injail; 911 912 /* 913 * Order of socket selection - we always prefer jails. 914 * 1. jailed, non-wild. 915 * 2. jailed, wild. 916 * 3. non-jailed, non-wild. 917 * 4. non-jailed, wild. 918 */ 919 head = &pcbgroup->ipg_hashbase[ 920 INP_PCBHASH(INADDR_ANY, lport, 0, pcbgroup->ipg_hashmask)]; 921 LIST_FOREACH(inp, head, inp_pcbgrouphash) { 922 /* XXX inp locking */ 923 if ((inp->inp_vflag & INP_IPV6) == 0) 924 continue; 925 926 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 927 inp->inp_lport != lport) { 928 continue; 929 } 930 931 injail = prison_flag(inp->inp_cred, PR_IP6); 932 if (injail) { 933 if (prison_check_ip6(inp->inp_cred, 934 laddr) != 0) 935 continue; 936 } else { 937 if (local_exact != NULL) 938 continue; 939 } 940 941 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) { 942 if (injail) 943 goto found; 944 else 945 local_exact = inp; 946 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 947 if (injail) 948 jail_wild = inp; 949 else 950 local_wild = inp; 951 } 952 } /* LIST_FOREACH */ 953 954 inp = jail_wild; 955 if (inp == NULL) 956 inp = jail_wild; 957 if (inp == NULL) 958 inp = local_exact; 959 if (inp == NULL) 960 inp = local_wild; 961 if (inp != NULL) 962 goto found; 963 } 964 965 /* 966 * Then look for a wildcard match, if requested. 967 */ 968 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) { 969 struct inpcb *local_wild = NULL, *local_exact = NULL; 970 struct inpcb *jail_wild = NULL; 971 int injail; 972 973 /* 974 * Order of socket selection - we always prefer jails. 975 * 1. jailed, non-wild. 976 * 2. jailed, wild. 977 * 3. non-jailed, non-wild. 978 * 4. non-jailed, wild. 979 */ 980 head = &pcbinfo->ipi_wildbase[INP_PCBHASH( 981 INP6_PCBHASHKEY(&in6addr_any), lport, 0, 982 pcbinfo->ipi_wildmask)]; 983 LIST_FOREACH(inp, head, inp_pcbgroup_wild) { 984 /* XXX inp locking */ 985 if ((inp->inp_vflag & INP_IPV6) == 0) 986 continue; 987 988 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 989 inp->inp_lport != lport) { 990 continue; 991 } 992 993 injail = prison_flag(inp->inp_cred, PR_IP6); 994 if (injail) { 995 if (prison_check_ip6(inp->inp_cred, 996 laddr) != 0) 997 continue; 998 } else { 999 if (local_exact != NULL) 1000 continue; 1001 } 1002 1003 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) { 1004 if (injail) 1005 goto found; 1006 else 1007 local_exact = inp; 1008 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 1009 if (injail) 1010 jail_wild = inp; 1011 else 1012 local_wild = inp; 1013 } 1014 } /* LIST_FOREACH */ 1015 1016 inp = jail_wild; 1017 if (inp == NULL) 1018 inp = jail_wild; 1019 if (inp == NULL) 1020 inp = local_exact; 1021 if (inp == NULL) 1022 inp = local_wild; 1023 if (inp != NULL) 1024 goto found; 1025 } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */ 1026 INP_GROUP_UNLOCK(pcbgroup); 1027 return (NULL); 1028 1029 found: 1030 if (lookupflags & INPLOOKUP_WLOCKPCB) 1031 locked = INP_TRY_WLOCK(inp); 1032 else if (lookupflags & INPLOOKUP_RLOCKPCB) 1033 locked = INP_TRY_RLOCK(inp); 1034 else 1035 panic("%s: locking buf", __func__); 1036 if (!locked) 1037 in_pcbref(inp); 1038 INP_GROUP_UNLOCK(pcbgroup); 1039 if (!locked) { 1040 if (lookupflags & INPLOOKUP_WLOCKPCB) { 1041 INP_WLOCK(inp); 1042 if (in_pcbrele_wlocked(inp)) 1043 return (NULL); 1044 } else { 1045 INP_RLOCK(inp); 1046 if (in_pcbrele_rlocked(inp)) 1047 return (NULL); 1048 } 1049 } 1050 #ifdef INVARIANTS 1051 if (lookupflags & INPLOOKUP_WLOCKPCB) 1052 INP_WLOCK_ASSERT(inp); 1053 else 1054 INP_RLOCK_ASSERT(inp); 1055 #endif 1056 return (inp); 1057 } 1058 #endif /* PCBGROUP */ 1059 1060 /* 1061 * Lookup PCB in hash list. 1062 */ 1063 static struct inpcb * 1064 in6_pcblookup_hash_locked(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, 1065 u_int fport_arg, struct in6_addr *laddr, u_int lport_arg, 1066 int lookupflags, struct ifnet *ifp) 1067 { 1068 struct inpcbhead *head; 1069 struct inpcb *inp, *tmpinp; 1070 u_short fport = fport_arg, lport = lport_arg; 1071 1072 KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0, 1073 ("%s: invalid lookup flags %d", __func__, lookupflags)); 1074 1075 INP_HASH_LOCK_ASSERT(pcbinfo); 1076 1077 /* 1078 * First look for an exact match. 1079 */ 1080 tmpinp = NULL; 1081 head = &pcbinfo->ipi_hashbase[INP_PCBHASH( 1082 INP6_PCBHASHKEY(faddr), lport, fport, pcbinfo->ipi_hashmask)]; 1083 LIST_FOREACH(inp, head, inp_hash) { 1084 /* XXX inp locking */ 1085 if ((inp->inp_vflag & INP_IPV6) == 0) 1086 continue; 1087 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) && 1088 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 1089 inp->inp_fport == fport && 1090 inp->inp_lport == lport) { 1091 /* 1092 * XXX We should be able to directly return 1093 * the inp here, without any checks. 1094 * Well unless both bound with SO_REUSEPORT? 1095 */ 1096 if (prison_flag(inp->inp_cred, PR_IP6)) 1097 return (inp); 1098 if (tmpinp == NULL) 1099 tmpinp = inp; 1100 } 1101 } 1102 if (tmpinp != NULL) 1103 return (tmpinp); 1104 1105 /* 1106 * Then look for a wildcard match, if requested. 1107 */ 1108 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) { 1109 struct inpcb *local_wild = NULL, *local_exact = NULL; 1110 struct inpcb *jail_wild = NULL; 1111 int injail; 1112 1113 /* 1114 * Order of socket selection - we always prefer jails. 1115 * 1. jailed, non-wild. 1116 * 2. jailed, wild. 1117 * 3. non-jailed, non-wild. 1118 * 4. non-jailed, wild. 1119 */ 1120 head = &pcbinfo->ipi_hashbase[INP_PCBHASH( 1121 INP6_PCBHASHKEY(&in6addr_any), lport, 0, 1122 pcbinfo->ipi_hashmask)]; 1123 LIST_FOREACH(inp, head, inp_hash) { 1124 /* XXX inp locking */ 1125 if ((inp->inp_vflag & INP_IPV6) == 0) 1126 continue; 1127 1128 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 1129 inp->inp_lport != lport) { 1130 continue; 1131 } 1132 1133 injail = prison_flag(inp->inp_cred, PR_IP6); 1134 if (injail) { 1135 if (prison_check_ip6(inp->inp_cred, 1136 laddr) != 0) 1137 continue; 1138 } else { 1139 if (local_exact != NULL) 1140 continue; 1141 } 1142 1143 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) { 1144 if (injail) 1145 return (inp); 1146 else 1147 local_exact = inp; 1148 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 1149 if (injail) 1150 jail_wild = inp; 1151 else 1152 local_wild = inp; 1153 } 1154 } /* LIST_FOREACH */ 1155 1156 if (jail_wild != NULL) 1157 return (jail_wild); 1158 if (local_exact != NULL) 1159 return (local_exact); 1160 if (local_wild != NULL) 1161 return (local_wild); 1162 } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */ 1163 1164 /* 1165 * Not found. 1166 */ 1167 return (NULL); 1168 } 1169 1170 /* 1171 * Lookup PCB in hash list, using pcbinfo tables. This variation locks the 1172 * hash list lock, and will return the inpcb locked (i.e., requires 1173 * INPLOOKUP_LOCKPCB). 1174 */ 1175 static struct inpcb * 1176 in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, 1177 u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags, 1178 struct ifnet *ifp) 1179 { 1180 struct inpcb *inp; 1181 bool locked; 1182 1183 INP_HASH_RLOCK(pcbinfo); 1184 inp = in6_pcblookup_hash_locked(pcbinfo, faddr, fport, laddr, lport, 1185 (lookupflags & ~(INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)), ifp); 1186 if (inp != NULL) { 1187 if (lookupflags & INPLOOKUP_WLOCKPCB) 1188 locked = INP_TRY_WLOCK(inp); 1189 else if (lookupflags & INPLOOKUP_RLOCKPCB) 1190 locked = INP_TRY_RLOCK(inp); 1191 else 1192 panic("%s: locking bug", __func__); 1193 if (!locked) 1194 in_pcbref(inp); 1195 INP_HASH_RUNLOCK(pcbinfo); 1196 if (!locked) { 1197 if (lookupflags & INPLOOKUP_WLOCKPCB) { 1198 INP_WLOCK(inp); 1199 if (in_pcbrele_wlocked(inp)) 1200 return (NULL); 1201 } else { 1202 INP_RLOCK(inp); 1203 if (in_pcbrele_rlocked(inp)) 1204 return (NULL); 1205 } 1206 } 1207 #ifdef INVARIANTS 1208 if (lookupflags & INPLOOKUP_WLOCKPCB) 1209 INP_WLOCK_ASSERT(inp); 1210 else 1211 INP_RLOCK_ASSERT(inp); 1212 #endif 1213 } else 1214 INP_HASH_RUNLOCK(pcbinfo); 1215 return (inp); 1216 } 1217 1218 /* 1219 * Public inpcb lookup routines, accepting a 4-tuple, and optionally, an mbuf 1220 * from which a pre-calculated hash value may be extracted. 1221 * 1222 * Possibly more of this logic should be in in6_pcbgroup.c. 1223 */ 1224 struct inpcb * 1225 in6_pcblookup(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, u_int fport, 1226 struct in6_addr *laddr, u_int lport, int lookupflags, struct ifnet *ifp) 1227 { 1228 #if defined(PCBGROUP) && !defined(RSS) 1229 struct inpcbgroup *pcbgroup; 1230 #endif 1231 1232 KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0, 1233 ("%s: invalid lookup flags %d", __func__, lookupflags)); 1234 KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0, 1235 ("%s: LOCKPCB not set", __func__)); 1236 1237 /* 1238 * When not using RSS, use connection groups in preference to the 1239 * reservation table when looking up 4-tuples. When using RSS, just 1240 * use the reservation table, due to the cost of the Toeplitz hash 1241 * in software. 1242 * 1243 * XXXRW: This policy belongs in the pcbgroup code, as in principle 1244 * we could be doing RSS with a non-Toeplitz hash that is affordable 1245 * in software. 1246 */ 1247 #if defined(PCBGROUP) && !defined(RSS) 1248 if (in_pcbgroup_enabled(pcbinfo)) { 1249 pcbgroup = in6_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr, 1250 fport); 1251 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, fport, 1252 laddr, lport, lookupflags, ifp)); 1253 } 1254 #endif 1255 return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport, 1256 lookupflags, ifp)); 1257 } 1258 1259 struct inpcb * 1260 in6_pcblookup_mbuf(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, 1261 u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags, 1262 struct ifnet *ifp, struct mbuf *m) 1263 { 1264 #ifdef PCBGROUP 1265 struct inpcbgroup *pcbgroup; 1266 #endif 1267 1268 KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0, 1269 ("%s: invalid lookup flags %d", __func__, lookupflags)); 1270 KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0, 1271 ("%s: LOCKPCB not set", __func__)); 1272 1273 #ifdef PCBGROUP 1274 /* 1275 * If we can use a hardware-generated hash to look up the connection 1276 * group, use that connection group to find the inpcb. Otherwise 1277 * fall back on a software hash -- or the reservation table if we're 1278 * using RSS. 1279 * 1280 * XXXRW: As above, that policy belongs in the pcbgroup code. 1281 */ 1282 if (in_pcbgroup_enabled(pcbinfo) && 1283 M_HASHTYPE_TEST(m, M_HASHTYPE_NONE) == 0) { 1284 pcbgroup = in6_pcbgroup_byhash(pcbinfo, M_HASHTYPE_GET(m), 1285 m->m_pkthdr.flowid); 1286 if (pcbgroup != NULL) 1287 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, 1288 fport, laddr, lport, lookupflags, ifp)); 1289 #ifndef RSS 1290 pcbgroup = in6_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr, 1291 fport); 1292 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, fport, 1293 laddr, lport, lookupflags, ifp)); 1294 #endif 1295 } 1296 #endif 1297 return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport, 1298 lookupflags, ifp)); 1299 } 1300 1301 void 1302 init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m, int srcordst) 1303 { 1304 struct ip6_hdr *ip; 1305 1306 ip = mtod(m, struct ip6_hdr *); 1307 bzero(sin6, sizeof(*sin6)); 1308 sin6->sin6_len = sizeof(*sin6); 1309 sin6->sin6_family = AF_INET6; 1310 sin6->sin6_addr = srcordst ? ip->ip6_dst : ip->ip6_src; 1311 1312 (void)sa6_recoverscope(sin6); /* XXX: should catch errors... */ 1313 1314 return; 1315 } 1316