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sys/netinet6/in6_pcb.c
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1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * Copyright (c) 2010-2011 Juniper Networks, Inc. 6 * All rights reserved. 7 * 8 * Portions of this software were developed by Robert N. M. Watson under 9 * contract to Juniper Networks, Inc. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the project nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * $KAME: in6_pcb.c,v 1.31 2001/05/21 05:45:10 jinmei Exp $ 36 */ 37 38 /*- 39 * Copyright (c) 1982, 1986, 1991, 1993 40 * The Regents of the University of California. All rights reserved. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. Neither the name of the University nor the names of its contributors 51 * may be used to endorse or promote products derived from this software 52 * without specific prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 57 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 64 * SUCH DAMAGE. 65 * 66 * @(#)in_pcb.c 8.2 (Berkeley) 1/4/94 67 */ 68 69 #include <sys/cdefs.h> 70 __FBSDID("$FreeBSD: releng/12.0/sys/netinet6/in6_pcb.c 338969 2018-09-27 15:32:37Z bz $"); 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 if (__predict_false(in6p->inp_flags2 & INP_FREED)) { 813 INP_WUNLOCK(in6p); 814 continue; 815 } 816 im6o = in6p->in6p_moptions; 817 if ((in6p->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 gap = 0; 829 for (i = 0; i < im6o->im6o_num_memberships; i++) { 830 if (im6o->im6o_membership[i]->in6m_ifp == 831 ifp) { 832 in6_leavegroup(im6o->im6o_membership[i], NULL); 833 gap++; 834 } else if (gap != 0) { 835 im6o->im6o_membership[i - gap] = 836 im6o->im6o_membership[i]; 837 } 838 } 839 im6o->im6o_num_memberships -= gap; 840 } 841 INP_WUNLOCK(in6p); 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 = NULL; 877 const struct inpcblbgrouphead *hdr; 878 struct inpcblbgroup *grp; 879 struct inpcblbgroup *grp_local_wild; 880 uint32_t idx; 881 882 INP_HASH_LOCK_ASSERT(pcbinfo); 883 884 hdr = &pcbinfo->ipi_lbgrouphashbase[INP_PCBLBGROUP_PORTHASH( 885 lport, pcbinfo->ipi_lbgrouphashmask)]; 886 887 /* 888 * Order of socket selection: 889 * 1. non-wild. 890 * 2. wild (if lookupflags contains INPLOOKUP_WILDCARD). 891 * 892 * NOTE: 893 * - Load balanced group does not contain jailed sockets. 894 * - Load balanced does not contain IPv4 mapped INET6 wild sockets. 895 */ 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 idx = 0; 903 int pkt_hash = INP_PCBLBGROUP_PKTHASH( 904 INP6_PCBHASHKEY(faddr), lport, fport); 905 906 idx = pkt_hash % grp->il_inpcnt; 907 908 if (IN6_ARE_ADDR_EQUAL(&grp->il6_laddr, laddr)) { 909 return (grp->il_inp[idx]); 910 } else { 911 if (IN6_IS_ADDR_UNSPECIFIED(&grp->il6_laddr) && 912 (lookupflags & INPLOOKUP_WILDCARD)) { 913 local_wild = grp->il_inp[idx]; 914 grp_local_wild = grp; 915 } 916 } 917 } 918 } 919 if (local_wild != NULL) { 920 return (local_wild); 921 } 922 return (NULL); 923 } 924 925 #ifdef PCBGROUP 926 /* 927 * Lookup PCB in hash list, using pcbgroup tables. 928 */ 929 static struct inpcb * 930 in6_pcblookup_group(struct inpcbinfo *pcbinfo, struct inpcbgroup *pcbgroup, 931 struct in6_addr *faddr, u_int fport_arg, struct in6_addr *laddr, 932 u_int lport_arg, int lookupflags, struct ifnet *ifp) 933 { 934 struct inpcbhead *head; 935 struct inpcb *inp, *tmpinp; 936 u_short fport = fport_arg, lport = lport_arg; 937 bool locked; 938 939 /* 940 * First look for an exact match. 941 */ 942 tmpinp = NULL; 943 INP_GROUP_LOCK(pcbgroup); 944 head = &pcbgroup->ipg_hashbase[INP_PCBHASH( 945 INP6_PCBHASHKEY(faddr), lport, fport, pcbgroup->ipg_hashmask)]; 946 CK_LIST_FOREACH(inp, head, inp_pcbgrouphash) { 947 /* XXX inp locking */ 948 if ((inp->inp_vflag & INP_IPV6) == 0) 949 continue; 950 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) && 951 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 952 inp->inp_fport == fport && 953 inp->inp_lport == lport) { 954 /* 955 * XXX We should be able to directly return 956 * the inp here, without any checks. 957 * Well unless both bound with SO_REUSEPORT? 958 */ 959 if (prison_flag(inp->inp_cred, PR_IP6)) 960 goto found; 961 if (tmpinp == NULL) 962 tmpinp = inp; 963 } 964 } 965 if (tmpinp != NULL) { 966 inp = tmpinp; 967 goto found; 968 } 969 970 /* 971 * Then look for a wildcard match in the pcbgroup. 972 */ 973 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) { 974 struct inpcb *local_wild = NULL, *local_exact = NULL; 975 struct inpcb *jail_wild = NULL; 976 int injail; 977 978 /* 979 * Order of socket selection - we always prefer jails. 980 * 1. jailed, non-wild. 981 * 2. jailed, wild. 982 * 3. non-jailed, non-wild. 983 * 4. non-jailed, wild. 984 */ 985 head = &pcbgroup->ipg_hashbase[ 986 INP_PCBHASH(INADDR_ANY, lport, 0, pcbgroup->ipg_hashmask)]; 987 CK_LIST_FOREACH(inp, head, inp_pcbgrouphash) { 988 /* XXX inp locking */ 989 if ((inp->inp_vflag & INP_IPV6) == 0) 990 continue; 991 992 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 993 inp->inp_lport != lport) { 994 continue; 995 } 996 997 injail = prison_flag(inp->inp_cred, PR_IP6); 998 if (injail) { 999 if (prison_check_ip6(inp->inp_cred, 1000 laddr) != 0) 1001 continue; 1002 } else { 1003 if (local_exact != NULL) 1004 continue; 1005 } 1006 1007 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) { 1008 if (injail) 1009 goto found; 1010 else 1011 local_exact = inp; 1012 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 1013 if (injail) 1014 jail_wild = inp; 1015 else 1016 local_wild = inp; 1017 } 1018 } /* LIST_FOREACH */ 1019 1020 inp = jail_wild; 1021 if (inp == NULL) 1022 inp = jail_wild; 1023 if (inp == NULL) 1024 inp = local_exact; 1025 if (inp == NULL) 1026 inp = local_wild; 1027 if (inp != NULL) 1028 goto found; 1029 } 1030 1031 /* 1032 * Then look for a wildcard match, if requested. 1033 */ 1034 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) { 1035 struct inpcb *local_wild = NULL, *local_exact = NULL; 1036 struct inpcb *jail_wild = NULL; 1037 int injail; 1038 1039 /* 1040 * Order of socket selection - we always prefer jails. 1041 * 1. jailed, non-wild. 1042 * 2. jailed, wild. 1043 * 3. non-jailed, non-wild. 1044 * 4. non-jailed, wild. 1045 */ 1046 head = &pcbinfo->ipi_wildbase[INP_PCBHASH( 1047 INP6_PCBHASHKEY(&in6addr_any), lport, 0, 1048 pcbinfo->ipi_wildmask)]; 1049 CK_LIST_FOREACH(inp, head, inp_pcbgroup_wild) { 1050 /* XXX inp locking */ 1051 if ((inp->inp_vflag & INP_IPV6) == 0) 1052 continue; 1053 1054 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 1055 inp->inp_lport != lport) { 1056 continue; 1057 } 1058 1059 injail = prison_flag(inp->inp_cred, PR_IP6); 1060 if (injail) { 1061 if (prison_check_ip6(inp->inp_cred, 1062 laddr) != 0) 1063 continue; 1064 } else { 1065 if (local_exact != NULL) 1066 continue; 1067 } 1068 1069 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) { 1070 if (injail) 1071 goto found; 1072 else 1073 local_exact = inp; 1074 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 1075 if (injail) 1076 jail_wild = inp; 1077 else 1078 local_wild = inp; 1079 } 1080 } /* LIST_FOREACH */ 1081 1082 inp = jail_wild; 1083 if (inp == NULL) 1084 inp = jail_wild; 1085 if (inp == NULL) 1086 inp = local_exact; 1087 if (inp == NULL) 1088 inp = local_wild; 1089 if (inp != NULL) 1090 goto found; 1091 } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */ 1092 INP_GROUP_UNLOCK(pcbgroup); 1093 return (NULL); 1094 1095 found: 1096 if (lookupflags & INPLOOKUP_WLOCKPCB) 1097 locked = INP_TRY_WLOCK(inp); 1098 else if (lookupflags & INPLOOKUP_RLOCKPCB) 1099 locked = INP_TRY_RLOCK(inp); 1100 else 1101 panic("%s: locking buf", __func__); 1102 if (!locked) 1103 in_pcbref(inp); 1104 INP_GROUP_UNLOCK(pcbgroup); 1105 if (!locked) { 1106 if (lookupflags & INPLOOKUP_WLOCKPCB) { 1107 INP_WLOCK(inp); 1108 if (in_pcbrele_wlocked(inp)) 1109 return (NULL); 1110 } else { 1111 INP_RLOCK(inp); 1112 if (in_pcbrele_rlocked(inp)) 1113 return (NULL); 1114 } 1115 } 1116 #ifdef INVARIANTS 1117 if (lookupflags & INPLOOKUP_WLOCKPCB) 1118 INP_WLOCK_ASSERT(inp); 1119 else 1120 INP_RLOCK_ASSERT(inp); 1121 #endif 1122 return (inp); 1123 } 1124 #endif /* PCBGROUP */ 1125 1126 /* 1127 * Lookup PCB in hash list. 1128 */ 1129 static struct inpcb * 1130 in6_pcblookup_hash_locked(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, 1131 u_int fport_arg, struct in6_addr *laddr, u_int lport_arg, 1132 int lookupflags, struct ifnet *ifp) 1133 { 1134 struct inpcbhead *head; 1135 struct inpcb *inp, *tmpinp; 1136 u_short fport = fport_arg, lport = lport_arg; 1137 1138 KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0, 1139 ("%s: invalid lookup flags %d", __func__, lookupflags)); 1140 1141 INP_HASH_LOCK_ASSERT(pcbinfo); 1142 1143 /* 1144 * First look for an exact match. 1145 */ 1146 tmpinp = NULL; 1147 head = &pcbinfo->ipi_hashbase[INP_PCBHASH( 1148 INP6_PCBHASHKEY(faddr), lport, fport, pcbinfo->ipi_hashmask)]; 1149 CK_LIST_FOREACH(inp, head, inp_hash) { 1150 /* XXX inp locking */ 1151 if ((inp->inp_vflag & INP_IPV6) == 0) 1152 continue; 1153 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) && 1154 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 1155 inp->inp_fport == fport && 1156 inp->inp_lport == lport) { 1157 /* 1158 * XXX We should be able to directly return 1159 * the inp here, without any checks. 1160 * Well unless both bound with SO_REUSEPORT? 1161 */ 1162 if (prison_flag(inp->inp_cred, PR_IP6)) 1163 return (inp); 1164 if (tmpinp == NULL) 1165 tmpinp = inp; 1166 } 1167 } 1168 if (tmpinp != NULL) 1169 return (tmpinp); 1170 1171 /* 1172 * Then look in lb group (for wildcard match). 1173 */ 1174 if (pcbinfo->ipi_lbgrouphashbase != NULL && 1175 (lookupflags & INPLOOKUP_WILDCARD)) { 1176 inp = in6_pcblookup_lbgroup(pcbinfo, laddr, lport, faddr, 1177 fport, lookupflags); 1178 if (inp != NULL) { 1179 return (inp); 1180 } 1181 } 1182 1183 /* 1184 * Then look for a wildcard match, if requested. 1185 */ 1186 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) { 1187 struct inpcb *local_wild = NULL, *local_exact = NULL; 1188 struct inpcb *jail_wild = NULL; 1189 int injail; 1190 1191 /* 1192 * Order of socket selection - we always prefer jails. 1193 * 1. jailed, non-wild. 1194 * 2. jailed, wild. 1195 * 3. non-jailed, non-wild. 1196 * 4. non-jailed, wild. 1197 */ 1198 head = &pcbinfo->ipi_hashbase[INP_PCBHASH( 1199 INP6_PCBHASHKEY(&in6addr_any), lport, 0, 1200 pcbinfo->ipi_hashmask)]; 1201 CK_LIST_FOREACH(inp, head, inp_hash) { 1202 /* XXX inp locking */ 1203 if ((inp->inp_vflag & INP_IPV6) == 0) 1204 continue; 1205 1206 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 1207 inp->inp_lport != lport) { 1208 continue; 1209 } 1210 1211 injail = prison_flag(inp->inp_cred, PR_IP6); 1212 if (injail) { 1213 if (prison_check_ip6(inp->inp_cred, 1214 laddr) != 0) 1215 continue; 1216 } else { 1217 if (local_exact != NULL) 1218 continue; 1219 } 1220 1221 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) { 1222 if (injail) 1223 return (inp); 1224 else 1225 local_exact = inp; 1226 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 1227 if (injail) 1228 jail_wild = inp; 1229 else 1230 local_wild = inp; 1231 } 1232 } /* LIST_FOREACH */ 1233 1234 if (jail_wild != NULL) 1235 return (jail_wild); 1236 if (local_exact != NULL) 1237 return (local_exact); 1238 if (local_wild != NULL) 1239 return (local_wild); 1240 } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */ 1241 1242 /* 1243 * Not found. 1244 */ 1245 return (NULL); 1246 } 1247 1248 /* 1249 * Lookup PCB in hash list, using pcbinfo tables. This variation locks the 1250 * hash list lock, and will return the inpcb locked (i.e., requires 1251 * INPLOOKUP_LOCKPCB). 1252 */ 1253 static struct inpcb * 1254 in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, 1255 u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags, 1256 struct ifnet *ifp) 1257 { 1258 struct inpcb *inp; 1259 1260 INP_HASH_RLOCK(pcbinfo); 1261 inp = in6_pcblookup_hash_locked(pcbinfo, faddr, fport, laddr, lport, 1262 (lookupflags & ~(INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)), ifp); 1263 if (inp != NULL) { 1264 if (lookupflags & INPLOOKUP_WLOCKPCB) { 1265 INP_WLOCK(inp); 1266 if (__predict_false(inp->inp_flags2 & INP_FREED)) { 1267 INP_WUNLOCK(inp); 1268 inp = NULL; 1269 } 1270 } else if (lookupflags & INPLOOKUP_RLOCKPCB) { 1271 INP_RLOCK(inp); 1272 if (__predict_false(inp->inp_flags2 & INP_FREED)) { 1273 INP_RUNLOCK(inp); 1274 inp = NULL; 1275 } 1276 } else 1277 panic("%s: locking bug", __func__); 1278 #ifdef INVARIANTS 1279 if (inp != NULL) { 1280 if (lookupflags & INPLOOKUP_WLOCKPCB) 1281 INP_WLOCK_ASSERT(inp); 1282 else 1283 INP_RLOCK_ASSERT(inp); 1284 } 1285 #endif 1286 } 1287 INP_HASH_RUNLOCK(pcbinfo); 1288 return (inp); 1289 } 1290 1291 /* 1292 * Public inpcb lookup routines, accepting a 4-tuple, and optionally, an mbuf 1293 * from which a pre-calculated hash value may be extracted. 1294 * 1295 * Possibly more of this logic should be in in6_pcbgroup.c. 1296 */ 1297 struct inpcb * 1298 in6_pcblookup(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, u_int fport, 1299 struct in6_addr *laddr, u_int lport, int lookupflags, struct ifnet *ifp) 1300 { 1301 #if defined(PCBGROUP) && !defined(RSS) 1302 struct inpcbgroup *pcbgroup; 1303 #endif 1304 1305 KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0, 1306 ("%s: invalid lookup flags %d", __func__, lookupflags)); 1307 KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0, 1308 ("%s: LOCKPCB not set", __func__)); 1309 1310 /* 1311 * When not using RSS, use connection groups in preference to the 1312 * reservation table when looking up 4-tuples. When using RSS, just 1313 * use the reservation table, due to the cost of the Toeplitz hash 1314 * in software. 1315 * 1316 * XXXRW: This policy belongs in the pcbgroup code, as in principle 1317 * we could be doing RSS with a non-Toeplitz hash that is affordable 1318 * in software. 1319 */ 1320 #if defined(PCBGROUP) && !defined(RSS) 1321 if (in_pcbgroup_enabled(pcbinfo)) { 1322 pcbgroup = in6_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr, 1323 fport); 1324 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, fport, 1325 laddr, lport, lookupflags, ifp)); 1326 } 1327 #endif 1328 return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport, 1329 lookupflags, ifp)); 1330 } 1331 1332 struct inpcb * 1333 in6_pcblookup_mbuf(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, 1334 u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags, 1335 struct ifnet *ifp, struct mbuf *m) 1336 { 1337 #ifdef PCBGROUP 1338 struct inpcbgroup *pcbgroup; 1339 #endif 1340 1341 KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0, 1342 ("%s: invalid lookup flags %d", __func__, lookupflags)); 1343 KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0, 1344 ("%s: LOCKPCB not set", __func__)); 1345 1346 #ifdef PCBGROUP 1347 /* 1348 * If we can use a hardware-generated hash to look up the connection 1349 * group, use that connection group to find the inpcb. Otherwise 1350 * fall back on a software hash -- or the reservation table if we're 1351 * using RSS. 1352 * 1353 * XXXRW: As above, that policy belongs in the pcbgroup code. 1354 */ 1355 if (in_pcbgroup_enabled(pcbinfo) && 1356 M_HASHTYPE_TEST(m, M_HASHTYPE_NONE) == 0) { 1357 pcbgroup = in6_pcbgroup_byhash(pcbinfo, M_HASHTYPE_GET(m), 1358 m->m_pkthdr.flowid); 1359 if (pcbgroup != NULL) 1360 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, 1361 fport, laddr, lport, lookupflags, ifp)); 1362 #ifndef RSS 1363 pcbgroup = in6_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr, 1364 fport); 1365 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, fport, 1366 laddr, lport, lookupflags, ifp)); 1367 #endif 1368 } 1369 #endif 1370 return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport, 1371 lookupflags, ifp)); 1372 } 1373 1374 void 1375 init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m, int srcordst) 1376 { 1377 struct ip6_hdr *ip; 1378 1379 ip = mtod(m, struct ip6_hdr *); 1380 bzero(sin6, sizeof(*sin6)); 1381 sin6->sin6_len = sizeof(*sin6); 1382 sin6->sin6_family = AF_INET6; 1383 sin6->sin6_addr = srcordst ? ip->ip6_dst : ip->ip6_src; 1384 1385 (void)sa6_recoverscope(sin6); /* XXX: should catch errors... */ 1386 1387 return; 1388 }
Cache object: ab7c62ab25db6342277a67cc694a3d40
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