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 ifaddr *ifa; 184 185 sin6->sin6_port = 0; /* yech... */ 186 NET_EPOCH_ENTER(); 187 if ((ifa = ifa_ifwithaddr((struct sockaddr *)sin6)) == 188 NULL && 189 (inp->inp_flags & INP_BINDANY) == 0) { 190 NET_EPOCH_EXIT(); 191 return (EADDRNOTAVAIL); 192 } 193 194 /* 195 * XXX: bind to an anycast address might accidentally 196 * cause sending a packet with anycast source address. 197 * We should allow to bind to a deprecated address, since 198 * the application dares to use it. 199 */ 200 if (ifa != NULL && 201 ((struct in6_ifaddr *)ifa)->ia6_flags & 202 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) { 203 NET_EPOCH_EXIT(); 204 return (EADDRNOTAVAIL); 205 } 206 NET_EPOCH_EXIT(); 207 } 208 if (lport) { 209 struct inpcb *t; 210 struct tcptw *tw; 211 212 /* GROSS */ 213 if (ntohs(lport) <= V_ipport_reservedhigh && 214 ntohs(lport) >= V_ipport_reservedlow && 215 priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 216 0)) 217 return (EACCES); 218 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) && 219 priv_check_cred(inp->inp_cred, 220 PRIV_NETINET_REUSEPORT, 0) != 0) { 221 t = in6_pcblookup_local(pcbinfo, 222 &sin6->sin6_addr, lport, 223 INPLOOKUP_WILDCARD, cred); 224 if (t && 225 ((inp->inp_flags2 & INP_BINDMULTI) == 0) && 226 ((t->inp_flags & INP_TIMEWAIT) == 0) && 227 (so->so_type != SOCK_STREAM || 228 IN6_IS_ADDR_UNSPECIFIED(&t->in6p_faddr)) && 229 (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 230 !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) || 231 (t->inp_flags2 & INP_REUSEPORT) || 232 (t->inp_flags2 & INP_REUSEPORT_LB) == 0) && 233 (inp->inp_cred->cr_uid != 234 t->inp_cred->cr_uid)) 235 return (EADDRINUSE); 236 237 /* 238 * If the socket is a BINDMULTI socket, then 239 * the credentials need to match and the 240 * original socket also has to have been bound 241 * with BINDMULTI. 242 */ 243 if (t && (! in_pcbbind_check_bindmulti(inp, t))) 244 return (EADDRINUSE); 245 246 #ifdef INET 247 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 && 248 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 249 struct sockaddr_in sin; 250 251 in6_sin6_2_sin(&sin, sin6); 252 t = in_pcblookup_local(pcbinfo, 253 sin.sin_addr, lport, 254 INPLOOKUP_WILDCARD, cred); 255 if (t && 256 ((inp->inp_flags2 & INP_BINDMULTI) == 0) && 257 ((t->inp_flags & 258 INP_TIMEWAIT) == 0) && 259 (so->so_type != SOCK_STREAM || 260 ntohl(t->inp_faddr.s_addr) == 261 INADDR_ANY) && 262 (inp->inp_cred->cr_uid != 263 t->inp_cred->cr_uid)) 264 return (EADDRINUSE); 265 266 if (t && (! in_pcbbind_check_bindmulti(inp, t))) 267 return (EADDRINUSE); 268 } 269 #endif 270 } 271 t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr, 272 lport, lookupflags, cred); 273 if (t && (t->inp_flags & INP_TIMEWAIT)) { 274 /* 275 * XXXRW: If an incpb has had its timewait 276 * state recycled, we treat the address as 277 * being in use (for now). This is better 278 * than a panic, but not desirable. 279 */ 280 tw = intotw(t); 281 if (tw == NULL || 282 ((reuseport & tw->tw_so_options) == 0 && 283 (reuseport_lb & tw->tw_so_options) == 0)) 284 return (EADDRINUSE); 285 } else if (t && (reuseport & inp_so_options(t)) == 0 && 286 (reuseport_lb & inp_so_options(t)) == 0) { 287 return (EADDRINUSE); 288 } 289 #ifdef INET 290 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 && 291 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 292 struct sockaddr_in sin; 293 294 in6_sin6_2_sin(&sin, sin6); 295 t = in_pcblookup_local(pcbinfo, sin.sin_addr, 296 lport, lookupflags, cred); 297 if (t && t->inp_flags & INP_TIMEWAIT) { 298 tw = intotw(t); 299 if (tw == NULL) 300 return (EADDRINUSE); 301 if ((reuseport & tw->tw_so_options) == 0 302 && (reuseport_lb & tw->tw_so_options) == 0 303 && (ntohl(t->inp_laddr.s_addr) != 304 INADDR_ANY || ((inp->inp_vflag & 305 INP_IPV6PROTO) == 306 (t->inp_vflag & INP_IPV6PROTO)))) 307 return (EADDRINUSE); 308 } else if (t && 309 (reuseport & inp_so_options(t)) == 0 && 310 (reuseport_lb & inp_so_options(t)) == 0 && 311 (ntohl(t->inp_laddr.s_addr) != INADDR_ANY || 312 (t->inp_vflag & INP_IPV6PROTO) != 0)) { 313 return (EADDRINUSE); 314 } 315 } 316 #endif 317 } 318 inp->in6p_laddr = sin6->sin6_addr; 319 } 320 if (lport == 0) { 321 if ((error = in6_pcbsetport(&inp->in6p_laddr, inp, cred)) != 0) { 322 /* Undo an address bind that may have occurred. */ 323 inp->in6p_laddr = in6addr_any; 324 return (error); 325 } 326 } else { 327 inp->inp_lport = lport; 328 if (in_pcbinshash(inp) != 0) { 329 inp->in6p_laddr = in6addr_any; 330 inp->inp_lport = 0; 331 return (EAGAIN); 332 } 333 } 334 return (0); 335 } 336 337 /* 338 * Transform old in6_pcbconnect() into an inner subroutine for new 339 * in6_pcbconnect(): Do some validity-checking on the remote 340 * address (in mbuf 'nam') and then determine local host address 341 * (i.e., which interface) to use to access that remote host. 342 * 343 * This preserves definition of in6_pcbconnect(), while supporting a 344 * slightly different version for T/TCP. (This is more than 345 * a bit of a kludge, but cleaning up the internal interfaces would 346 * have forced minor changes in every protocol). 347 */ 348 static int 349 in6_pcbladdr(struct inpcb *inp, struct sockaddr *nam, 350 struct in6_addr *plocal_addr6) 351 { 352 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 353 int error = 0; 354 int scope_ambiguous = 0; 355 struct in6_addr in6a; 356 357 INP_WLOCK_ASSERT(inp); 358 INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo); /* XXXRW: why? */ 359 360 if (nam->sa_len != sizeof (*sin6)) 361 return (EINVAL); 362 if (sin6->sin6_family != AF_INET6) 363 return (EAFNOSUPPORT); 364 if (sin6->sin6_port == 0) 365 return (EADDRNOTAVAIL); 366 367 if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone) 368 scope_ambiguous = 1; 369 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0) 370 return(error); 371 372 if (!CK_STAILQ_EMPTY(&V_in6_ifaddrhead)) { 373 /* 374 * If the destination address is UNSPECIFIED addr, 375 * use the loopback addr, e.g ::1. 376 */ 377 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 378 sin6->sin6_addr = in6addr_loopback; 379 } 380 if ((error = prison_remote_ip6(inp->inp_cred, &sin6->sin6_addr)) != 0) 381 return (error); 382 383 error = in6_selectsrc_socket(sin6, inp->in6p_outputopts, 384 inp, inp->inp_cred, scope_ambiguous, &in6a, NULL); 385 if (error) 386 return (error); 387 388 /* 389 * Do not update this earlier, in case we return with an error. 390 * 391 * XXX: this in6_selectsrc_socket result might replace the bound local 392 * address with the address specified by setsockopt(IPV6_PKTINFO). 393 * Is it the intended behavior? 394 */ 395 *plocal_addr6 = in6a; 396 397 /* 398 * Don't do pcblookup call here; return interface in 399 * plocal_addr6 400 * and exit to caller, that will do the lookup. 401 */ 402 403 return (0); 404 } 405 406 /* 407 * Outer subroutine: 408 * Connect from a socket to a specified address. 409 * Both address and port must be specified in argument sin. 410 * If don't have a local address for this socket yet, 411 * then pick one. 412 */ 413 int 414 in6_pcbconnect_mbuf(struct inpcb *inp, struct sockaddr *nam, 415 struct ucred *cred, struct mbuf *m) 416 { 417 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 418 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 419 struct in6_addr addr6; 420 int error; 421 422 INP_WLOCK_ASSERT(inp); 423 INP_HASH_WLOCK_ASSERT(pcbinfo); 424 425 /* 426 * Call inner routine, to assign local interface address. 427 * in6_pcbladdr() may automatically fill in sin6_scope_id. 428 */ 429 if ((error = in6_pcbladdr(inp, nam, &addr6)) != 0) 430 return (error); 431 432 if (in6_pcblookup_hash_locked(pcbinfo, &sin6->sin6_addr, 433 sin6->sin6_port, 434 IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) 435 ? &addr6 : &inp->in6p_laddr, 436 inp->inp_lport, 0, NULL) != NULL) { 437 return (EADDRINUSE); 438 } 439 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 440 if (inp->inp_lport == 0) { 441 error = in6_pcbbind(inp, (struct sockaddr *)0, cred); 442 if (error) 443 return (error); 444 } 445 inp->in6p_laddr = addr6; 446 } 447 inp->in6p_faddr = sin6->sin6_addr; 448 inp->inp_fport = sin6->sin6_port; 449 /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 450 inp->inp_flow &= ~IPV6_FLOWLABEL_MASK; 451 if (inp->inp_flags & IN6P_AUTOFLOWLABEL) 452 inp->inp_flow |= 453 (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK); 454 455 in_pcbrehash_mbuf(inp, m); 456 457 return (0); 458 } 459 460 int 461 in6_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred) 462 { 463 464 return (in6_pcbconnect_mbuf(inp, nam, cred, NULL)); 465 } 466 467 void 468 in6_pcbdisconnect(struct inpcb *inp) 469 { 470 471 INP_WLOCK_ASSERT(inp); 472 INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo); 473 474 bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr)); 475 inp->inp_fport = 0; 476 /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 477 inp->inp_flow &= ~IPV6_FLOWLABEL_MASK; 478 in_pcbrehash(inp); 479 } 480 481 struct sockaddr * 482 in6_sockaddr(in_port_t port, struct in6_addr *addr_p) 483 { 484 struct sockaddr_in6 *sin6; 485 486 sin6 = malloc(sizeof *sin6, M_SONAME, M_WAITOK); 487 bzero(sin6, sizeof *sin6); 488 sin6->sin6_family = AF_INET6; 489 sin6->sin6_len = sizeof(*sin6); 490 sin6->sin6_port = port; 491 sin6->sin6_addr = *addr_p; 492 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */ 493 494 return (struct sockaddr *)sin6; 495 } 496 497 struct sockaddr * 498 in6_v4mapsin6_sockaddr(in_port_t port, struct in_addr *addr_p) 499 { 500 struct sockaddr_in sin; 501 struct sockaddr_in6 *sin6_p; 502 503 bzero(&sin, sizeof sin); 504 sin.sin_family = AF_INET; 505 sin.sin_len = sizeof(sin); 506 sin.sin_port = port; 507 sin.sin_addr = *addr_p; 508 509 sin6_p = malloc(sizeof *sin6_p, M_SONAME, 510 M_WAITOK); 511 in6_sin_2_v4mapsin6(&sin, sin6_p); 512 513 return (struct sockaddr *)sin6_p; 514 } 515 516 int 517 in6_getsockaddr(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_getsockaddr: inp == NULL")); 525 526 INP_RLOCK(inp); 527 port = inp->inp_lport; 528 addr = inp->in6p_laddr; 529 INP_RUNLOCK(inp); 530 531 *nam = in6_sockaddr(port, &addr); 532 return 0; 533 } 534 535 int 536 in6_getpeeraddr(struct socket *so, struct sockaddr **nam) 537 { 538 struct inpcb *inp; 539 struct in6_addr addr; 540 in_port_t port; 541 542 inp = sotoinpcb(so); 543 KASSERT(inp != NULL, ("in6_getpeeraddr: inp == NULL")); 544 545 INP_RLOCK(inp); 546 port = inp->inp_fport; 547 addr = inp->in6p_faddr; 548 INP_RUNLOCK(inp); 549 550 *nam = in6_sockaddr(port, &addr); 551 return 0; 552 } 553 554 int 555 in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam) 556 { 557 struct inpcb *inp; 558 int error; 559 560 inp = sotoinpcb(so); 561 KASSERT(inp != NULL, ("in6_mapped_sockaddr: inp == NULL")); 562 563 #ifdef INET 564 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) { 565 error = in_getsockaddr(so, nam); 566 if (error == 0) 567 in6_sin_2_v4mapsin6_in_sock(nam); 568 } else 569 #endif 570 { 571 /* scope issues will be handled in in6_getsockaddr(). */ 572 error = in6_getsockaddr(so, nam); 573 } 574 575 return error; 576 } 577 578 int 579 in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam) 580 { 581 struct inpcb *inp; 582 int error; 583 584 inp = sotoinpcb(so); 585 KASSERT(inp != NULL, ("in6_mapped_peeraddr: inp == NULL")); 586 587 #ifdef INET 588 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) { 589 error = in_getpeeraddr(so, nam); 590 if (error == 0) 591 in6_sin_2_v4mapsin6_in_sock(nam); 592 } else 593 #endif 594 /* scope issues will be handled in in6_getpeeraddr(). */ 595 error = in6_getpeeraddr(so, nam); 596 597 return error; 598 } 599 600 /* 601 * Pass some notification to all connections of a protocol 602 * associated with address dst. The local address and/or port numbers 603 * may be specified to limit the search. The "usual action" will be 604 * taken, depending on the ctlinput cmd. The caller must filter any 605 * cmds that are uninteresting (e.g., no error in the map). 606 * Call the protocol specific routine (if any) to report 607 * any errors for each matching socket. 608 */ 609 void 610 in6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr *dst, 611 u_int fport_arg, const struct sockaddr *src, u_int lport_arg, 612 int cmd, void *cmdarg, 613 struct inpcb *(*notify)(struct inpcb *, int)) 614 { 615 struct inpcb *inp, *inp_temp; 616 struct sockaddr_in6 sa6_src, *sa6_dst; 617 u_short fport = fport_arg, lport = lport_arg; 618 u_int32_t flowinfo; 619 int errno; 620 621 if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6) 622 return; 623 624 sa6_dst = (struct sockaddr_in6 *)dst; 625 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr)) 626 return; 627 628 /* 629 * note that src can be NULL when we get notify by local fragmentation. 630 */ 631 sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src; 632 flowinfo = sa6_src.sin6_flowinfo; 633 634 /* 635 * Redirects go to all references to the destination, 636 * and use in6_rtchange to invalidate the route cache. 637 * Dead host indications: also use in6_rtchange to invalidate 638 * the cache, and deliver the error to all the sockets. 639 * Otherwise, if we have knowledge of the local port and address, 640 * deliver only to that socket. 641 */ 642 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 643 fport = 0; 644 lport = 0; 645 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr)); 646 647 if (cmd != PRC_HOSTDEAD) 648 notify = in6_rtchange; 649 } 650 errno = inet6ctlerrmap[cmd]; 651 INP_INFO_WLOCK(pcbinfo); 652 CK_LIST_FOREACH_SAFE(inp, pcbinfo->ipi_listhead, inp_list, inp_temp) { 653 INP_WLOCK(inp); 654 if ((inp->inp_vflag & INP_IPV6) == 0) { 655 INP_WUNLOCK(inp); 656 continue; 657 } 658 659 /* 660 * If the error designates a new path MTU for a destination 661 * and the application (associated with this socket) wanted to 662 * know the value, notify. 663 * XXX: should we avoid to notify the value to TCP sockets? 664 */ 665 if (cmd == PRC_MSGSIZE && cmdarg != NULL) 666 ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst, 667 *(u_int32_t *)cmdarg); 668 669 /* 670 * Detect if we should notify the error. If no source and 671 * destination ports are specifed, but non-zero flowinfo and 672 * local address match, notify the error. This is the case 673 * when the error is delivered with an encrypted buffer 674 * by ESP. Otherwise, just compare addresses and ports 675 * as usual. 676 */ 677 if (lport == 0 && fport == 0 && flowinfo && 678 inp->inp_socket != NULL && 679 flowinfo == (inp->inp_flow & IPV6_FLOWLABEL_MASK) && 680 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr)) 681 goto do_notify; 682 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, 683 &sa6_dst->sin6_addr) || 684 inp->inp_socket == 0 || 685 (lport && inp->inp_lport != lport) || 686 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) && 687 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 688 &sa6_src.sin6_addr)) || 689 (fport && inp->inp_fport != fport)) { 690 INP_WUNLOCK(inp); 691 continue; 692 } 693 694 do_notify: 695 if (notify) { 696 if ((*notify)(inp, errno)) 697 INP_WUNLOCK(inp); 698 } else 699 INP_WUNLOCK(inp); 700 } 701 INP_INFO_WUNLOCK(pcbinfo); 702 } 703 704 /* 705 * Lookup a PCB based on the local address and port. Caller must hold the 706 * hash lock. No inpcb locks or references are acquired. 707 */ 708 struct inpcb * 709 in6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr, 710 u_short lport, int lookupflags, struct ucred *cred) 711 { 712 struct inpcb *inp; 713 int matchwild = 3, wildcard; 714 715 KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0, 716 ("%s: invalid lookup flags %d", __func__, lookupflags)); 717 718 INP_HASH_WLOCK_ASSERT(pcbinfo); 719 720 if ((lookupflags & INPLOOKUP_WILDCARD) == 0) { 721 struct inpcbhead *head; 722 /* 723 * Look for an unconnected (wildcard foreign addr) PCB that 724 * matches the local address and port we're looking for. 725 */ 726 head = &pcbinfo->ipi_hashbase[INP_PCBHASH( 727 INP6_PCBHASHKEY(&in6addr_any), lport, 0, 728 pcbinfo->ipi_hashmask)]; 729 CK_LIST_FOREACH(inp, head, inp_hash) { 730 /* XXX inp locking */ 731 if ((inp->inp_vflag & INP_IPV6) == 0) 732 continue; 733 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 734 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 735 inp->inp_lport == lport) { 736 /* Found. */ 737 if (cred == NULL || 738 prison_equal_ip6(cred->cr_prison, 739 inp->inp_cred->cr_prison)) 740 return (inp); 741 } 742 } 743 /* 744 * Not found. 745 */ 746 return (NULL); 747 } else { 748 struct inpcbporthead *porthash; 749 struct inpcbport *phd; 750 struct inpcb *match = NULL; 751 /* 752 * Best fit PCB lookup. 753 * 754 * First see if this local port is in use by looking on the 755 * port hash list. 756 */ 757 porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport, 758 pcbinfo->ipi_porthashmask)]; 759 CK_LIST_FOREACH(phd, porthash, phd_hash) { 760 if (phd->phd_port == lport) 761 break; 762 } 763 if (phd != NULL) { 764 /* 765 * Port is in use by one or more PCBs. Look for best 766 * fit. 767 */ 768 CK_LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) { 769 wildcard = 0; 770 if (cred != NULL && 771 !prison_equal_ip6(cred->cr_prison, 772 inp->inp_cred->cr_prison)) 773 continue; 774 /* XXX inp locking */ 775 if ((inp->inp_vflag & INP_IPV6) == 0) 776 continue; 777 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 778 wildcard++; 779 if (!IN6_IS_ADDR_UNSPECIFIED( 780 &inp->in6p_laddr)) { 781 if (IN6_IS_ADDR_UNSPECIFIED(laddr)) 782 wildcard++; 783 else if (!IN6_ARE_ADDR_EQUAL( 784 &inp->in6p_laddr, laddr)) 785 continue; 786 } else { 787 if (!IN6_IS_ADDR_UNSPECIFIED(laddr)) 788 wildcard++; 789 } 790 if (wildcard < matchwild) { 791 match = inp; 792 matchwild = wildcard; 793 if (matchwild == 0) 794 break; 795 } 796 } 797 } 798 return (match); 799 } 800 } 801 802 void 803 in6_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp) 804 { 805 struct inpcb *in6p; 806 struct ip6_moptions *im6o; 807 int i, gap; 808 809 INP_INFO_WLOCK(pcbinfo); 810 CK_LIST_FOREACH(in6p, pcbinfo->ipi_listhead, inp_list) { 811 INP_WLOCK(in6p); 812 im6o = in6p->in6p_moptions; 813 if ((in6p->inp_vflag & INP_IPV6) && im6o != NULL) { 814 /* 815 * Unselect the outgoing ifp for multicast if it 816 * is being detached. 817 */ 818 if (im6o->im6o_multicast_ifp == ifp) 819 im6o->im6o_multicast_ifp = NULL; 820 /* 821 * Drop multicast group membership if we joined 822 * through the interface being detached. 823 */ 824 gap = 0; 825 for (i = 0; i < im6o->im6o_num_memberships; i++) { 826 if (im6o->im6o_membership[i]->in6m_ifp == 827 ifp) { 828 in6_leavegroup(im6o->im6o_membership[i], NULL); 829 gap++; 830 } else if (gap != 0) { 831 im6o->im6o_membership[i - gap] = 832 im6o->im6o_membership[i]; 833 } 834 } 835 im6o->im6o_num_memberships -= gap; 836 } 837 INP_WUNLOCK(in6p); 838 } 839 INP_INFO_WUNLOCK(pcbinfo); 840 } 841 842 /* 843 * Check for alternatives when higher level complains 844 * about service problems. For now, invalidate cached 845 * routing information. If the route was created dynamically 846 * (by a redirect), time to try a default gateway again. 847 */ 848 void 849 in6_losing(struct inpcb *in6p) 850 { 851 852 if (in6p->inp_route6.ro_rt) { 853 RTFREE(in6p->inp_route6.ro_rt); 854 in6p->inp_route6.ro_rt = (struct rtentry *)NULL; 855 } 856 if (in6p->inp_route.ro_lle) 857 LLE_FREE(in6p->inp_route.ro_lle); /* zeros ro_lle */ 858 return; 859 } 860 861 /* 862 * After a routing change, flush old routing 863 * and allocate a (hopefully) better one. 864 */ 865 struct inpcb * 866 in6_rtchange(struct inpcb *inp, int errno) 867 { 868 869 if (inp->inp_route6.ro_rt) { 870 RTFREE(inp->inp_route6.ro_rt); 871 inp->inp_route6.ro_rt = (struct rtentry *)NULL; 872 } 873 if (inp->inp_route.ro_lle) 874 LLE_FREE(inp->inp_route.ro_lle); /* zeros ro_lle */ 875 return inp; 876 } 877 878 static struct inpcb * 879 in6_pcblookup_lbgroup(const struct inpcbinfo *pcbinfo, 880 const struct in6_addr *laddr, uint16_t lport, const struct in6_addr *faddr, 881 uint16_t fport, int lookupflags) 882 { 883 struct inpcb *local_wild = NULL; 884 const struct inpcblbgrouphead *hdr; 885 struct inpcblbgroup *grp; 886 struct inpcblbgroup *grp_local_wild; 887 uint32_t idx; 888 889 INP_HASH_LOCK_ASSERT(pcbinfo); 890 891 hdr = &pcbinfo->ipi_lbgrouphashbase[INP_PCBLBGROUP_PORTHASH( 892 lport, pcbinfo->ipi_lbgrouphashmask)]; 893 894 /* 895 * Order of socket selection: 896 * 1. non-wild. 897 * 2. wild (if lookupflags contains INPLOOKUP_WILDCARD). 898 * 899 * NOTE: 900 * - Load balanced group does not contain jailed sockets. 901 * - Load balanced does not contain IPv4 mapped INET6 wild sockets. 902 */ 903 LIST_FOREACH(grp, hdr, il_list) { 904 if (grp->il_lport == lport) { 905 idx = 0; 906 int pkt_hash = INP_PCBLBGROUP_PKTHASH( 907 INP6_PCBHASHKEY(faddr), lport, fport); 908 909 idx = pkt_hash % grp->il_inpcnt; 910 911 if (IN6_ARE_ADDR_EQUAL(&grp->il6_laddr, laddr)) { 912 return (grp->il_inp[idx]); 913 } else { 914 if (IN6_IS_ADDR_UNSPECIFIED(&grp->il6_laddr) && 915 (lookupflags & INPLOOKUP_WILDCARD)) { 916 local_wild = grp->il_inp[idx]; 917 grp_local_wild = grp; 918 } 919 } 920 } 921 } 922 if (local_wild != NULL) { 923 return (local_wild); 924 } 925 return (NULL); 926 } 927 928 #ifdef PCBGROUP 929 /* 930 * Lookup PCB in hash list, using pcbgroup tables. 931 */ 932 static struct inpcb * 933 in6_pcblookup_group(struct inpcbinfo *pcbinfo, struct inpcbgroup *pcbgroup, 934 struct in6_addr *faddr, u_int fport_arg, struct in6_addr *laddr, 935 u_int lport_arg, int lookupflags, struct ifnet *ifp) 936 { 937 struct inpcbhead *head; 938 struct inpcb *inp, *tmpinp; 939 u_short fport = fport_arg, lport = lport_arg; 940 bool locked; 941 942 /* 943 * First look for an exact match. 944 */ 945 tmpinp = NULL; 946 INP_GROUP_LOCK(pcbgroup); 947 head = &pcbgroup->ipg_hashbase[INP_PCBHASH( 948 INP6_PCBHASHKEY(faddr), lport, fport, pcbgroup->ipg_hashmask)]; 949 CK_LIST_FOREACH(inp, head, inp_pcbgrouphash) { 950 /* XXX inp locking */ 951 if ((inp->inp_vflag & INP_IPV6) == 0) 952 continue; 953 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) && 954 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 955 inp->inp_fport == fport && 956 inp->inp_lport == lport) { 957 /* 958 * XXX We should be able to directly return 959 * the inp here, without any checks. 960 * Well unless both bound with SO_REUSEPORT? 961 */ 962 if (prison_flag(inp->inp_cred, PR_IP6)) 963 goto found; 964 if (tmpinp == NULL) 965 tmpinp = inp; 966 } 967 } 968 if (tmpinp != NULL) { 969 inp = tmpinp; 970 goto found; 971 } 972 973 /* 974 * Then look for a wildcard match in the pcbgroup. 975 */ 976 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) { 977 struct inpcb *local_wild = NULL, *local_exact = NULL; 978 struct inpcb *jail_wild = NULL; 979 int injail; 980 981 /* 982 * Order of socket selection - we always prefer jails. 983 * 1. jailed, non-wild. 984 * 2. jailed, wild. 985 * 3. non-jailed, non-wild. 986 * 4. non-jailed, wild. 987 */ 988 head = &pcbgroup->ipg_hashbase[ 989 INP_PCBHASH(INADDR_ANY, lport, 0, pcbgroup->ipg_hashmask)]; 990 CK_LIST_FOREACH(inp, head, inp_pcbgrouphash) { 991 /* XXX inp locking */ 992 if ((inp->inp_vflag & INP_IPV6) == 0) 993 continue; 994 995 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 996 inp->inp_lport != lport) { 997 continue; 998 } 999 1000 injail = prison_flag(inp->inp_cred, PR_IP6); 1001 if (injail) { 1002 if (prison_check_ip6(inp->inp_cred, 1003 laddr) != 0) 1004 continue; 1005 } else { 1006 if (local_exact != NULL) 1007 continue; 1008 } 1009 1010 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) { 1011 if (injail) 1012 goto found; 1013 else 1014 local_exact = inp; 1015 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 1016 if (injail) 1017 jail_wild = inp; 1018 else 1019 local_wild = inp; 1020 } 1021 } /* LIST_FOREACH */ 1022 1023 inp = jail_wild; 1024 if (inp == NULL) 1025 inp = jail_wild; 1026 if (inp == NULL) 1027 inp = local_exact; 1028 if (inp == NULL) 1029 inp = local_wild; 1030 if (inp != NULL) 1031 goto found; 1032 } 1033 1034 /* 1035 * Then look for a wildcard match, if requested. 1036 */ 1037 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) { 1038 struct inpcb *local_wild = NULL, *local_exact = NULL; 1039 struct inpcb *jail_wild = NULL; 1040 int injail; 1041 1042 /* 1043 * Order of socket selection - we always prefer jails. 1044 * 1. jailed, non-wild. 1045 * 2. jailed, wild. 1046 * 3. non-jailed, non-wild. 1047 * 4. non-jailed, wild. 1048 */ 1049 head = &pcbinfo->ipi_wildbase[INP_PCBHASH( 1050 INP6_PCBHASHKEY(&in6addr_any), lport, 0, 1051 pcbinfo->ipi_wildmask)]; 1052 CK_LIST_FOREACH(inp, head, inp_pcbgroup_wild) { 1053 /* XXX inp locking */ 1054 if ((inp->inp_vflag & INP_IPV6) == 0) 1055 continue; 1056 1057 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 1058 inp->inp_lport != lport) { 1059 continue; 1060 } 1061 1062 injail = prison_flag(inp->inp_cred, PR_IP6); 1063 if (injail) { 1064 if (prison_check_ip6(inp->inp_cred, 1065 laddr) != 0) 1066 continue; 1067 } else { 1068 if (local_exact != NULL) 1069 continue; 1070 } 1071 1072 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) { 1073 if (injail) 1074 goto found; 1075 else 1076 local_exact = inp; 1077 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 1078 if (injail) 1079 jail_wild = inp; 1080 else 1081 local_wild = inp; 1082 } 1083 } /* LIST_FOREACH */ 1084 1085 inp = jail_wild; 1086 if (inp == NULL) 1087 inp = jail_wild; 1088 if (inp == NULL) 1089 inp = local_exact; 1090 if (inp == NULL) 1091 inp = local_wild; 1092 if (inp != NULL) 1093 goto found; 1094 } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */ 1095 INP_GROUP_UNLOCK(pcbgroup); 1096 return (NULL); 1097 1098 found: 1099 if (lookupflags & INPLOOKUP_WLOCKPCB) 1100 locked = INP_TRY_WLOCK(inp); 1101 else if (lookupflags & INPLOOKUP_RLOCKPCB) 1102 locked = INP_TRY_RLOCK(inp); 1103 else 1104 panic("%s: locking buf", __func__); 1105 if (!locked) 1106 in_pcbref(inp); 1107 INP_GROUP_UNLOCK(pcbgroup); 1108 if (!locked) { 1109 if (lookupflags & INPLOOKUP_WLOCKPCB) { 1110 INP_WLOCK(inp); 1111 if (in_pcbrele_wlocked(inp)) 1112 return (NULL); 1113 } else { 1114 INP_RLOCK(inp); 1115 if (in_pcbrele_rlocked(inp)) 1116 return (NULL); 1117 } 1118 } 1119 #ifdef INVARIANTS 1120 if (lookupflags & INPLOOKUP_WLOCKPCB) 1121 INP_WLOCK_ASSERT(inp); 1122 else 1123 INP_RLOCK_ASSERT(inp); 1124 #endif 1125 return (inp); 1126 } 1127 #endif /* PCBGROUP */ 1128 1129 /* 1130 * Lookup PCB in hash list. 1131 */ 1132 static struct inpcb * 1133 in6_pcblookup_hash_locked(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, 1134 u_int fport_arg, struct in6_addr *laddr, u_int lport_arg, 1135 int lookupflags, struct ifnet *ifp) 1136 { 1137 struct inpcbhead *head; 1138 struct inpcb *inp, *tmpinp; 1139 u_short fport = fport_arg, lport = lport_arg; 1140 1141 KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0, 1142 ("%s: invalid lookup flags %d", __func__, lookupflags)); 1143 1144 INP_HASH_LOCK_ASSERT(pcbinfo); 1145 1146 /* 1147 * First look for an exact match. 1148 */ 1149 tmpinp = NULL; 1150 head = &pcbinfo->ipi_hashbase[INP_PCBHASH( 1151 INP6_PCBHASHKEY(faddr), lport, fport, pcbinfo->ipi_hashmask)]; 1152 CK_LIST_FOREACH(inp, head, inp_hash) { 1153 /* XXX inp locking */ 1154 if ((inp->inp_vflag & INP_IPV6) == 0) 1155 continue; 1156 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) && 1157 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 1158 inp->inp_fport == fport && 1159 inp->inp_lport == lport) { 1160 /* 1161 * XXX We should be able to directly return 1162 * the inp here, without any checks. 1163 * Well unless both bound with SO_REUSEPORT? 1164 */ 1165 if (prison_flag(inp->inp_cred, PR_IP6)) 1166 return (inp); 1167 if (tmpinp == NULL) 1168 tmpinp = inp; 1169 } 1170 } 1171 if (tmpinp != NULL) 1172 return (tmpinp); 1173 1174 /* 1175 * Then look in lb group (for wildcard match). 1176 */ 1177 if (pcbinfo->ipi_lbgrouphashbase != NULL && 1178 (lookupflags & INPLOOKUP_WILDCARD)) { 1179 inp = in6_pcblookup_lbgroup(pcbinfo, laddr, lport, faddr, 1180 fport, lookupflags); 1181 if (inp != NULL) { 1182 return (inp); 1183 } 1184 } 1185 1186 /* 1187 * Then look for a wildcard match, if requested. 1188 */ 1189 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) { 1190 struct inpcb *local_wild = NULL, *local_exact = NULL; 1191 struct inpcb *jail_wild = NULL; 1192 int injail; 1193 1194 /* 1195 * Order of socket selection - we always prefer jails. 1196 * 1. jailed, non-wild. 1197 * 2. jailed, wild. 1198 * 3. non-jailed, non-wild. 1199 * 4. non-jailed, wild. 1200 */ 1201 head = &pcbinfo->ipi_hashbase[INP_PCBHASH( 1202 INP6_PCBHASHKEY(&in6addr_any), lport, 0, 1203 pcbinfo->ipi_hashmask)]; 1204 CK_LIST_FOREACH(inp, head, inp_hash) { 1205 /* XXX inp locking */ 1206 if ((inp->inp_vflag & INP_IPV6) == 0) 1207 continue; 1208 1209 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 1210 inp->inp_lport != lport) { 1211 continue; 1212 } 1213 1214 injail = prison_flag(inp->inp_cred, PR_IP6); 1215 if (injail) { 1216 if (prison_check_ip6(inp->inp_cred, 1217 laddr) != 0) 1218 continue; 1219 } else { 1220 if (local_exact != NULL) 1221 continue; 1222 } 1223 1224 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) { 1225 if (injail) 1226 return (inp); 1227 else 1228 local_exact = inp; 1229 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 1230 if (injail) 1231 jail_wild = inp; 1232 else 1233 local_wild = inp; 1234 } 1235 } /* LIST_FOREACH */ 1236 1237 if (jail_wild != NULL) 1238 return (jail_wild); 1239 if (local_exact != NULL) 1240 return (local_exact); 1241 if (local_wild != NULL) 1242 return (local_wild); 1243 } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */ 1244 1245 /* 1246 * Not found. 1247 */ 1248 return (NULL); 1249 } 1250 1251 /* 1252 * Lookup PCB in hash list, using pcbinfo tables. This variation locks the 1253 * hash list lock, and will return the inpcb locked (i.e., requires 1254 * INPLOOKUP_LOCKPCB). 1255 */ 1256 static struct inpcb * 1257 in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, 1258 u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags, 1259 struct ifnet *ifp) 1260 { 1261 struct inpcb *inp; 1262 bool locked; 1263 1264 INP_HASH_RLOCK(pcbinfo); 1265 inp = in6_pcblookup_hash_locked(pcbinfo, faddr, fport, laddr, lport, 1266 (lookupflags & ~(INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)), ifp); 1267 if (inp != NULL) { 1268 if (lookupflags & INPLOOKUP_WLOCKPCB) 1269 locked = INP_TRY_WLOCK(inp); 1270 else if (lookupflags & INPLOOKUP_RLOCKPCB) 1271 locked = INP_TRY_RLOCK(inp); 1272 else 1273 panic("%s: locking bug", __func__); 1274 if (!locked) 1275 in_pcbref(inp); 1276 INP_HASH_RUNLOCK(pcbinfo); 1277 if (!locked) { 1278 if (lookupflags & INPLOOKUP_WLOCKPCB) { 1279 INP_WLOCK(inp); 1280 if (in_pcbrele_wlocked(inp)) 1281 return (NULL); 1282 } else { 1283 INP_RLOCK(inp); 1284 if (in_pcbrele_rlocked(inp)) 1285 return (NULL); 1286 } 1287 } 1288 #ifdef INVARIANTS 1289 if (lookupflags & INPLOOKUP_WLOCKPCB) 1290 INP_WLOCK_ASSERT(inp); 1291 else 1292 INP_RLOCK_ASSERT(inp); 1293 #endif 1294 } else 1295 INP_HASH_RUNLOCK(pcbinfo); 1296 return (inp); 1297 } 1298 1299 /* 1300 * Public inpcb lookup routines, accepting a 4-tuple, and optionally, an mbuf 1301 * from which a pre-calculated hash value may be extracted. 1302 * 1303 * Possibly more of this logic should be in in6_pcbgroup.c. 1304 */ 1305 struct inpcb * 1306 in6_pcblookup(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, u_int fport, 1307 struct in6_addr *laddr, u_int lport, int lookupflags, struct ifnet *ifp) 1308 { 1309 #if defined(PCBGROUP) && !defined(RSS) 1310 struct inpcbgroup *pcbgroup; 1311 #endif 1312 1313 KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0, 1314 ("%s: invalid lookup flags %d", __func__, lookupflags)); 1315 KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0, 1316 ("%s: LOCKPCB not set", __func__)); 1317 1318 /* 1319 * When not using RSS, use connection groups in preference to the 1320 * reservation table when looking up 4-tuples. When using RSS, just 1321 * use the reservation table, due to the cost of the Toeplitz hash 1322 * in software. 1323 * 1324 * XXXRW: This policy belongs in the pcbgroup code, as in principle 1325 * we could be doing RSS with a non-Toeplitz hash that is affordable 1326 * in software. 1327 */ 1328 #if defined(PCBGROUP) && !defined(RSS) 1329 if (in_pcbgroup_enabled(pcbinfo)) { 1330 pcbgroup = in6_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr, 1331 fport); 1332 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, fport, 1333 laddr, lport, lookupflags, ifp)); 1334 } 1335 #endif 1336 return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport, 1337 lookupflags, ifp)); 1338 } 1339 1340 struct inpcb * 1341 in6_pcblookup_mbuf(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, 1342 u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags, 1343 struct ifnet *ifp, struct mbuf *m) 1344 { 1345 #ifdef PCBGROUP 1346 struct inpcbgroup *pcbgroup; 1347 #endif 1348 1349 KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0, 1350 ("%s: invalid lookup flags %d", __func__, lookupflags)); 1351 KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0, 1352 ("%s: LOCKPCB not set", __func__)); 1353 1354 #ifdef PCBGROUP 1355 /* 1356 * If we can use a hardware-generated hash to look up the connection 1357 * group, use that connection group to find the inpcb. Otherwise 1358 * fall back on a software hash -- or the reservation table if we're 1359 * using RSS. 1360 * 1361 * XXXRW: As above, that policy belongs in the pcbgroup code. 1362 */ 1363 if (in_pcbgroup_enabled(pcbinfo) && 1364 M_HASHTYPE_TEST(m, M_HASHTYPE_NONE) == 0) { 1365 pcbgroup = in6_pcbgroup_byhash(pcbinfo, M_HASHTYPE_GET(m), 1366 m->m_pkthdr.flowid); 1367 if (pcbgroup != NULL) 1368 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, 1369 fport, laddr, lport, lookupflags, ifp)); 1370 #ifndef RSS 1371 pcbgroup = in6_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr, 1372 fport); 1373 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, fport, 1374 laddr, lport, lookupflags, ifp)); 1375 #endif 1376 } 1377 #endif 1378 return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport, 1379 lookupflags, ifp)); 1380 } 1381 1382 void 1383 init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m, int srcordst) 1384 { 1385 struct ip6_hdr *ip; 1386 1387 ip = mtod(m, struct ip6_hdr *); 1388 bzero(sin6, sizeof(*sin6)); 1389 sin6->sin6_len = sizeof(*sin6); 1390 sin6->sin6_family = AF_INET6; 1391 sin6->sin6_addr = srcordst ? ip->ip6_dst : ip->ip6_src; 1392 1393 (void)sa6_recoverscope(sin6); /* XXX: should catch errors... */ 1394 1395 return; 1396 } 1397