Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/netinet6/in6_pcb.c
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1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * Copyright (c) 2010-2011 Juniper Networks, Inc. 6 * All rights reserved. 7 * 8 * Portions of this software were developed by Robert N. M. Watson under 9 * contract to Juniper Networks, Inc. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the project nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * $KAME: in6_pcb.c,v 1.31 2001/05/21 05:45:10 jinmei Exp $ 36 */ 37 38 /*- 39 * Copyright (c) 1982, 1986, 1991, 1993 40 * The Regents of the University of California. All rights reserved. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. Neither the name of the University nor the names of its contributors 51 * may be used to endorse or promote products derived from this software 52 * without specific prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 57 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 64 * SUCH DAMAGE. 65 * 66 * @(#)in_pcb.c 8.2 (Berkeley) 1/4/94 67 */ 68 69 #include <sys/cdefs.h> 70 __FBSDID("$FreeBSD$"); 71 72 #include "opt_inet.h" 73 #include "opt_inet6.h" 74 #include "opt_ipsec.h" 75 #include "opt_pcbgroup.h" 76 #include "opt_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 int 115 in6_pcbbind(struct inpcb *inp, struct sockaddr *nam, 116 struct ucred *cred) 117 { 118 struct socket *so = inp->inp_socket; 119 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL; 120 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 121 u_short lport = 0; 122 int error, lookupflags = 0; 123 int reuseport = (so->so_options & SO_REUSEPORT); 124 125 /* 126 * XXX: Maybe we could let SO_REUSEPORT_LB set SO_REUSEPORT bit here 127 * so that we don't have to add to the (already messy) code below. 128 */ 129 int reuseport_lb = (so->so_options & SO_REUSEPORT_LB); 130 131 INP_WLOCK_ASSERT(inp); 132 INP_HASH_WLOCK_ASSERT(pcbinfo); 133 134 if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) 135 return (EINVAL); 136 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT|SO_REUSEPORT_LB)) == 0) 137 lookupflags = INPLOOKUP_WILDCARD; 138 if (nam == NULL) { 139 if ((error = prison_local_ip6(cred, &inp->in6p_laddr, 140 ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0) 141 return (error); 142 } else { 143 sin6 = (struct sockaddr_in6 *)nam; 144 if (nam->sa_len != sizeof(*sin6)) 145 return (EINVAL); 146 /* 147 * family check. 148 */ 149 if (nam->sa_family != AF_INET6) 150 return (EAFNOSUPPORT); 151 152 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0) 153 return(error); 154 155 if ((error = prison_local_ip6(cred, &sin6->sin6_addr, 156 ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0) 157 return (error); 158 159 lport = sin6->sin6_port; 160 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 161 /* 162 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 163 * allow compepte duplication of binding if 164 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 165 * and a multicast address is bound on both 166 * new and duplicated sockets. 167 */ 168 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) != 0) 169 reuseport = SO_REUSEADDR|SO_REUSEPORT; 170 /* 171 * XXX: How to deal with SO_REUSEPORT_LB here? 172 * Treat same as SO_REUSEPORT for now. 173 */ 174 if ((so->so_options & 175 (SO_REUSEADDR|SO_REUSEPORT_LB)) != 0) 176 reuseport_lb = SO_REUSEADDR|SO_REUSEPORT_LB; 177 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 178 struct ifaddr *ifa; 179 180 sin6->sin6_port = 0; /* yech... */ 181 NET_EPOCH_ENTER(); 182 if ((ifa = ifa_ifwithaddr((struct sockaddr *)sin6)) == 183 NULL && 184 (inp->inp_flags & INP_BINDANY) == 0) { 185 NET_EPOCH_EXIT(); 186 return (EADDRNOTAVAIL); 187 } 188 189 /* 190 * XXX: bind to an anycast address might accidentally 191 * cause sending a packet with anycast source address. 192 * We should allow to bind to a deprecated address, since 193 * the application dares to use it. 194 */ 195 if (ifa != NULL && 196 ((struct in6_ifaddr *)ifa)->ia6_flags & 197 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) { 198 NET_EPOCH_EXIT(); 199 return (EADDRNOTAVAIL); 200 } 201 NET_EPOCH_EXIT(); 202 } 203 if (lport) { 204 struct inpcb *t; 205 struct tcptw *tw; 206 207 /* GROSS */ 208 if (ntohs(lport) <= V_ipport_reservedhigh && 209 ntohs(lport) >= V_ipport_reservedlow && 210 priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT, 211 0)) 212 return (EACCES); 213 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) && 214 priv_check_cred(inp->inp_cred, 215 PRIV_NETINET_REUSEPORT, 0) != 0) { 216 t = in6_pcblookup_local(pcbinfo, 217 &sin6->sin6_addr, lport, 218 INPLOOKUP_WILDCARD, cred); 219 if (t && 220 ((inp->inp_flags2 & INP_BINDMULTI) == 0) && 221 ((t->inp_flags & INP_TIMEWAIT) == 0) && 222 (so->so_type != SOCK_STREAM || 223 IN6_IS_ADDR_UNSPECIFIED(&t->in6p_faddr)) && 224 (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 225 !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) || 226 (t->inp_flags2 & INP_REUSEPORT) || 227 (t->inp_flags2 & INP_REUSEPORT_LB) == 0) && 228 (inp->inp_cred->cr_uid != 229 t->inp_cred->cr_uid)) 230 return (EADDRINUSE); 231 232 /* 233 * If the socket is a BINDMULTI socket, then 234 * the credentials need to match and the 235 * original socket also has to have been bound 236 * with BINDMULTI. 237 */ 238 if (t && (! in_pcbbind_check_bindmulti(inp, t))) 239 return (EADDRINUSE); 240 241 #ifdef INET 242 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 && 243 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 244 struct sockaddr_in sin; 245 246 in6_sin6_2_sin(&sin, sin6); 247 t = in_pcblookup_local(pcbinfo, 248 sin.sin_addr, lport, 249 INPLOOKUP_WILDCARD, cred); 250 if (t && 251 ((inp->inp_flags2 & INP_BINDMULTI) == 0) && 252 ((t->inp_flags & 253 INP_TIMEWAIT) == 0) && 254 (so->so_type != SOCK_STREAM || 255 ntohl(t->inp_faddr.s_addr) == 256 INADDR_ANY) && 257 (inp->inp_cred->cr_uid != 258 t->inp_cred->cr_uid)) 259 return (EADDRINUSE); 260 261 if (t && (! in_pcbbind_check_bindmulti(inp, t))) 262 return (EADDRINUSE); 263 } 264 #endif 265 } 266 t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr, 267 lport, lookupflags, cred); 268 if (t && (t->inp_flags & INP_TIMEWAIT)) { 269 /* 270 * XXXRW: If an incpb has had its timewait 271 * state recycled, we treat the address as 272 * being in use (for now). This is better 273 * than a panic, but not desirable. 274 */ 275 tw = intotw(t); 276 if (tw == NULL || 277 ((reuseport & tw->tw_so_options) == 0 && 278 (reuseport_lb & tw->tw_so_options) == 0)) 279 return (EADDRINUSE); 280 } else if (t && (reuseport & inp_so_options(t)) == 0 && 281 (reuseport_lb & inp_so_options(t)) == 0) { 282 return (EADDRINUSE); 283 } 284 #ifdef INET 285 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 && 286 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 287 struct sockaddr_in sin; 288 289 in6_sin6_2_sin(&sin, sin6); 290 t = in_pcblookup_local(pcbinfo, sin.sin_addr, 291 lport, lookupflags, cred); 292 if (t && t->inp_flags & INP_TIMEWAIT) { 293 tw = intotw(t); 294 if (tw == NULL) 295 return (EADDRINUSE); 296 if ((reuseport & tw->tw_so_options) == 0 297 && (reuseport_lb & tw->tw_so_options) == 0 298 && (ntohl(t->inp_laddr.s_addr) != 299 INADDR_ANY || ((inp->inp_vflag & 300 INP_IPV6PROTO) == 301 (t->inp_vflag & INP_IPV6PROTO)))) 302 return (EADDRINUSE); 303 } else if (t && 304 (reuseport & inp_so_options(t)) == 0 && 305 (reuseport_lb & inp_so_options(t)) == 0 && 306 (ntohl(t->inp_laddr.s_addr) != INADDR_ANY || 307 (t->inp_vflag & INP_IPV6PROTO) != 0)) { 308 return (EADDRINUSE); 309 } 310 } 311 #endif 312 } 313 inp->in6p_laddr = sin6->sin6_addr; 314 } 315 if (lport == 0) { 316 if ((error = in6_pcbsetport(&inp->in6p_laddr, inp, cred)) != 0) { 317 /* Undo an address bind that may have occurred. */ 318 inp->in6p_laddr = in6addr_any; 319 return (error); 320 } 321 } else { 322 inp->inp_lport = lport; 323 if (in_pcbinshash(inp) != 0) { 324 inp->in6p_laddr = in6addr_any; 325 inp->inp_lport = 0; 326 return (EAGAIN); 327 } 328 } 329 return (0); 330 } 331 332 /* 333 * Transform old in6_pcbconnect() into an inner subroutine for new 334 * in6_pcbconnect(): Do some validity-checking on the remote 335 * address (in mbuf 'nam') and then determine local host address 336 * (i.e., which interface) to use to access that remote host. 337 * 338 * This preserves definition of in6_pcbconnect(), while supporting a 339 * slightly different version for T/TCP. (This is more than 340 * a bit of a kludge, but cleaning up the internal interfaces would 341 * have forced minor changes in every protocol). 342 */ 343 static int 344 in6_pcbladdr(struct inpcb *inp, struct sockaddr *nam, 345 struct in6_addr *plocal_addr6) 346 { 347 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 348 int error = 0; 349 int scope_ambiguous = 0; 350 struct in6_addr in6a; 351 352 INP_WLOCK_ASSERT(inp); 353 INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo); /* XXXRW: why? */ 354 355 if (nam->sa_len != sizeof (*sin6)) 356 return (EINVAL); 357 if (sin6->sin6_family != AF_INET6) 358 return (EAFNOSUPPORT); 359 if (sin6->sin6_port == 0) 360 return (EADDRNOTAVAIL); 361 362 if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone) 363 scope_ambiguous = 1; 364 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0) 365 return(error); 366 367 if (!CK_STAILQ_EMPTY(&V_in6_ifaddrhead)) { 368 /* 369 * If the destination address is UNSPECIFIED addr, 370 * use the loopback addr, e.g ::1. 371 */ 372 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 373 sin6->sin6_addr = in6addr_loopback; 374 } 375 if ((error = prison_remote_ip6(inp->inp_cred, &sin6->sin6_addr)) != 0) 376 return (error); 377 378 error = in6_selectsrc_socket(sin6, inp->in6p_outputopts, 379 inp, inp->inp_cred, scope_ambiguous, &in6a, NULL); 380 if (error) 381 return (error); 382 383 /* 384 * Do not update this earlier, in case we return with an error. 385 * 386 * XXX: this in6_selectsrc_socket result might replace the bound local 387 * address with the address specified by setsockopt(IPV6_PKTINFO). 388 * Is it the intended behavior? 389 */ 390 *plocal_addr6 = in6a; 391 392 /* 393 * Don't do pcblookup call here; return interface in 394 * plocal_addr6 395 * and exit to caller, that will do the lookup. 396 */ 397 398 return (0); 399 } 400 401 /* 402 * Outer subroutine: 403 * Connect from a socket to a specified address. 404 * Both address and port must be specified in argument sin. 405 * If don't have a local address for this socket yet, 406 * then pick one. 407 */ 408 int 409 in6_pcbconnect_mbuf(struct inpcb *inp, struct sockaddr *nam, 410 struct ucred *cred, struct mbuf *m, bool rehash) 411 { 412 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 413 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 414 struct sockaddr_in6 laddr6; 415 int error; 416 417 bzero(&laddr6, sizeof(laddr6)); 418 laddr6.sin6_family = AF_INET6; 419 420 INP_WLOCK_ASSERT(inp); 421 INP_HASH_WLOCK_ASSERT(pcbinfo); 422 423 /* 424 * Call inner routine, to assign local interface address. 425 * in6_pcbladdr() may automatically fill in sin6_scope_id. 426 */ 427 if ((error = in6_pcbladdr(inp, nam, &laddr6.sin6_addr)) != 0) 428 return (error); 429 430 if (in6_pcblookup_hash_locked(pcbinfo, &sin6->sin6_addr, 431 sin6->sin6_port, 432 IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) 433 ? &laddr6.sin6_addr : &inp->in6p_laddr, 434 inp->inp_lport, 0, NULL) != NULL) { 435 return (EADDRINUSE); 436 } 437 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 438 if (inp->inp_lport == 0) { 439 KASSERT(rehash == true, 440 ("Rehashing required for unbound inps")); 441 rehash = false; 442 error = in_pcb_lport_dest(inp, 443 (struct sockaddr *) &laddr6, &inp->inp_lport, 444 (struct sockaddr *) sin6, sin6->sin6_port, cred, 0); 445 if (error) 446 return (error); 447 } 448 inp->in6p_laddr = laddr6.sin6_addr; 449 } 450 inp->in6p_faddr = sin6->sin6_addr; 451 inp->inp_fport = sin6->sin6_port; 452 /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 453 inp->inp_flow &= ~IPV6_FLOWLABEL_MASK; 454 if (inp->inp_flags & IN6P_AUTOFLOWLABEL) 455 inp->inp_flow |= 456 (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK); 457 458 if (rehash) { 459 in_pcbrehash_mbuf(inp, m); 460 } else { 461 in_pcbinshash_mbuf(inp, m); 462 } 463 464 return (0); 465 } 466 467 int 468 in6_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred) 469 { 470 471 return (in6_pcbconnect_mbuf(inp, nam, cred, NULL, true)); 472 } 473 474 void 475 in6_pcbdisconnect(struct inpcb *inp) 476 { 477 478 INP_WLOCK_ASSERT(inp); 479 INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo); 480 481 bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr)); 482 inp->inp_fport = 0; 483 /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 484 inp->inp_flow &= ~IPV6_FLOWLABEL_MASK; 485 in_pcbrehash(inp); 486 } 487 488 struct sockaddr * 489 in6_sockaddr(in_port_t port, struct in6_addr *addr_p) 490 { 491 struct sockaddr_in6 *sin6; 492 493 sin6 = malloc(sizeof *sin6, M_SONAME, M_WAITOK); 494 bzero(sin6, sizeof *sin6); 495 sin6->sin6_family = AF_INET6; 496 sin6->sin6_len = sizeof(*sin6); 497 sin6->sin6_port = port; 498 sin6->sin6_addr = *addr_p; 499 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */ 500 501 return (struct sockaddr *)sin6; 502 } 503 504 struct sockaddr * 505 in6_v4mapsin6_sockaddr(in_port_t port, struct in_addr *addr_p) 506 { 507 struct sockaddr_in sin; 508 struct sockaddr_in6 *sin6_p; 509 510 bzero(&sin, sizeof sin); 511 sin.sin_family = AF_INET; 512 sin.sin_len = sizeof(sin); 513 sin.sin_port = port; 514 sin.sin_addr = *addr_p; 515 516 sin6_p = malloc(sizeof *sin6_p, M_SONAME, 517 M_WAITOK); 518 in6_sin_2_v4mapsin6(&sin, sin6_p); 519 520 return (struct sockaddr *)sin6_p; 521 } 522 523 int 524 in6_getsockaddr(struct socket *so, struct sockaddr **nam) 525 { 526 struct inpcb *inp; 527 struct in6_addr addr; 528 in_port_t port; 529 530 inp = sotoinpcb(so); 531 KASSERT(inp != NULL, ("in6_getsockaddr: inp == NULL")); 532 533 INP_RLOCK(inp); 534 port = inp->inp_lport; 535 addr = inp->in6p_laddr; 536 INP_RUNLOCK(inp); 537 538 *nam = in6_sockaddr(port, &addr); 539 return 0; 540 } 541 542 int 543 in6_getpeeraddr(struct socket *so, struct sockaddr **nam) 544 { 545 struct inpcb *inp; 546 struct in6_addr addr; 547 in_port_t port; 548 549 inp = sotoinpcb(so); 550 KASSERT(inp != NULL, ("in6_getpeeraddr: inp == NULL")); 551 552 INP_RLOCK(inp); 553 port = inp->inp_fport; 554 addr = inp->in6p_faddr; 555 INP_RUNLOCK(inp); 556 557 *nam = in6_sockaddr(port, &addr); 558 return 0; 559 } 560 561 int 562 in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam) 563 { 564 struct inpcb *inp; 565 int error; 566 567 inp = sotoinpcb(so); 568 KASSERT(inp != NULL, ("in6_mapped_sockaddr: inp == NULL")); 569 570 #ifdef INET 571 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) { 572 error = in_getsockaddr(so, nam); 573 if (error == 0) 574 in6_sin_2_v4mapsin6_in_sock(nam); 575 } else 576 #endif 577 { 578 /* scope issues will be handled in in6_getsockaddr(). */ 579 error = in6_getsockaddr(so, nam); 580 } 581 582 return error; 583 } 584 585 int 586 in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam) 587 { 588 struct inpcb *inp; 589 int error; 590 591 inp = sotoinpcb(so); 592 KASSERT(inp != NULL, ("in6_mapped_peeraddr: inp == NULL")); 593 594 #ifdef INET 595 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) { 596 error = in_getpeeraddr(so, nam); 597 if (error == 0) 598 in6_sin_2_v4mapsin6_in_sock(nam); 599 } else 600 #endif 601 /* scope issues will be handled in in6_getpeeraddr(). */ 602 error = in6_getpeeraddr(so, nam); 603 604 return error; 605 } 606 607 /* 608 * Pass some notification to all connections of a protocol 609 * associated with address dst. The local address and/or port numbers 610 * may be specified to limit the search. The "usual action" will be 611 * taken, depending on the ctlinput cmd. The caller must filter any 612 * cmds that are uninteresting (e.g., no error in the map). 613 * Call the protocol specific routine (if any) to report 614 * any errors for each matching socket. 615 */ 616 void 617 in6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr *dst, 618 u_int fport_arg, const struct sockaddr *src, u_int lport_arg, 619 int cmd, void *cmdarg, 620 struct inpcb *(*notify)(struct inpcb *, int)) 621 { 622 struct inpcb *inp, *inp_temp; 623 struct sockaddr_in6 sa6_src, *sa6_dst; 624 u_short fport = fport_arg, lport = lport_arg; 625 u_int32_t flowinfo; 626 int errno; 627 628 if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6) 629 return; 630 631 sa6_dst = (struct sockaddr_in6 *)dst; 632 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr)) 633 return; 634 635 /* 636 * note that src can be NULL when we get notify by local fragmentation. 637 */ 638 sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src; 639 flowinfo = sa6_src.sin6_flowinfo; 640 641 /* 642 * Redirects go to all references to the destination, 643 * and use in6_rtchange to invalidate the route cache. 644 * Dead host indications: also use in6_rtchange to invalidate 645 * the cache, and deliver the error to all the sockets. 646 * Otherwise, if we have knowledge of the local port and address, 647 * deliver only to that socket. 648 */ 649 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 650 fport = 0; 651 lport = 0; 652 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr)); 653 654 if (cmd != PRC_HOSTDEAD) 655 notify = in6_rtchange; 656 } 657 errno = inet6ctlerrmap[cmd]; 658 INP_INFO_WLOCK(pcbinfo); 659 CK_LIST_FOREACH_SAFE(inp, pcbinfo->ipi_listhead, inp_list, inp_temp) { 660 INP_WLOCK(inp); 661 if ((inp->inp_vflag & INP_IPV6) == 0) { 662 INP_WUNLOCK(inp); 663 continue; 664 } 665 666 /* 667 * If the error designates a new path MTU for a destination 668 * and the application (associated with this socket) wanted to 669 * know the value, notify. 670 * XXX: should we avoid to notify the value to TCP sockets? 671 */ 672 if (cmd == PRC_MSGSIZE && cmdarg != NULL) 673 ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst, 674 *(u_int32_t *)cmdarg); 675 676 /* 677 * Detect if we should notify the error. If no source and 678 * destination ports are specifed, but non-zero flowinfo and 679 * local address match, notify the error. This is the case 680 * when the error is delivered with an encrypted buffer 681 * by ESP. Otherwise, just compare addresses and ports 682 * as usual. 683 */ 684 if (lport == 0 && fport == 0 && flowinfo && 685 inp->inp_socket != NULL && 686 flowinfo == (inp->inp_flow & IPV6_FLOWLABEL_MASK) && 687 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr)) 688 goto do_notify; 689 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, 690 &sa6_dst->sin6_addr) || 691 inp->inp_socket == 0 || 692 (lport && inp->inp_lport != lport) || 693 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) && 694 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 695 &sa6_src.sin6_addr)) || 696 (fport && inp->inp_fport != fport)) { 697 INP_WUNLOCK(inp); 698 continue; 699 } 700 701 do_notify: 702 if (notify) { 703 if ((*notify)(inp, errno)) 704 INP_WUNLOCK(inp); 705 } else 706 INP_WUNLOCK(inp); 707 } 708 INP_INFO_WUNLOCK(pcbinfo); 709 } 710 711 /* 712 * Lookup a PCB based on the local address and port. Caller must hold the 713 * hash lock. No inpcb locks or references are acquired. 714 */ 715 struct inpcb * 716 in6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr, 717 u_short lport, int lookupflags, struct ucred *cred) 718 { 719 struct inpcb *inp; 720 int matchwild = 3, wildcard; 721 722 KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0, 723 ("%s: invalid lookup flags %d", __func__, lookupflags)); 724 725 INP_HASH_WLOCK_ASSERT(pcbinfo); 726 727 if ((lookupflags & INPLOOKUP_WILDCARD) == 0) { 728 struct inpcbhead *head; 729 /* 730 * Look for an unconnected (wildcard foreign addr) PCB that 731 * matches the local address and port we're looking for. 732 */ 733 head = &pcbinfo->ipi_hashbase[INP_PCBHASH( 734 INP6_PCBHASHKEY(&in6addr_any), lport, 0, 735 pcbinfo->ipi_hashmask)]; 736 CK_LIST_FOREACH(inp, head, inp_hash) { 737 /* XXX inp locking */ 738 if ((inp->inp_vflag & INP_IPV6) == 0) 739 continue; 740 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 741 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 742 inp->inp_lport == lport) { 743 /* Found. */ 744 if (cred == NULL || 745 prison_equal_ip6(cred->cr_prison, 746 inp->inp_cred->cr_prison)) 747 return (inp); 748 } 749 } 750 /* 751 * Not found. 752 */ 753 return (NULL); 754 } else { 755 struct inpcbporthead *porthash; 756 struct inpcbport *phd; 757 struct inpcb *match = NULL; 758 /* 759 * Best fit PCB lookup. 760 * 761 * First see if this local port is in use by looking on the 762 * port hash list. 763 */ 764 porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport, 765 pcbinfo->ipi_porthashmask)]; 766 CK_LIST_FOREACH(phd, porthash, phd_hash) { 767 if (phd->phd_port == lport) 768 break; 769 } 770 if (phd != NULL) { 771 /* 772 * Port is in use by one or more PCBs. Look for best 773 * fit. 774 */ 775 CK_LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) { 776 wildcard = 0; 777 if (cred != NULL && 778 !prison_equal_ip6(cred->cr_prison, 779 inp->inp_cred->cr_prison)) 780 continue; 781 /* XXX inp locking */ 782 if ((inp->inp_vflag & INP_IPV6) == 0) 783 continue; 784 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 785 wildcard++; 786 if (!IN6_IS_ADDR_UNSPECIFIED( 787 &inp->in6p_laddr)) { 788 if (IN6_IS_ADDR_UNSPECIFIED(laddr)) 789 wildcard++; 790 else if (!IN6_ARE_ADDR_EQUAL( 791 &inp->in6p_laddr, laddr)) 792 continue; 793 } else { 794 if (!IN6_IS_ADDR_UNSPECIFIED(laddr)) 795 wildcard++; 796 } 797 if (wildcard < matchwild) { 798 match = inp; 799 matchwild = wildcard; 800 if (matchwild == 0) 801 break; 802 } 803 } 804 } 805 return (match); 806 } 807 } 808 809 void 810 in6_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp) 811 { 812 struct inpcb *inp; 813 struct in6_multi *inm; 814 struct in6_mfilter *imf; 815 struct ip6_moptions *im6o; 816 817 INP_INFO_WLOCK(pcbinfo); 818 CK_LIST_FOREACH(inp, pcbinfo->ipi_listhead, inp_list) { 819 INP_WLOCK(inp); 820 if (__predict_false(inp->inp_flags2 & INP_FREED)) { 821 INP_WUNLOCK(inp); 822 continue; 823 } 824 im6o = inp->in6p_moptions; 825 if ((inp->inp_vflag & INP_IPV6) && im6o != NULL) { 826 /* 827 * Unselect the outgoing ifp for multicast if it 828 * is being detached. 829 */ 830 if (im6o->im6o_multicast_ifp == ifp) 831 im6o->im6o_multicast_ifp = NULL; 832 /* 833 * Drop multicast group membership if we joined 834 * through the interface being detached. 835 */ 836 restart: 837 IP6_MFILTER_FOREACH(imf, &im6o->im6o_head) { 838 if ((inm = imf->im6f_in6m) == NULL) 839 continue; 840 if (inm->in6m_ifp != ifp) 841 continue; 842 ip6_mfilter_remove(&im6o->im6o_head, imf); 843 IN6_MULTI_LOCK_ASSERT(); 844 in6_leavegroup_locked(inm, NULL); 845 ip6_mfilter_free(imf); 846 goto restart; 847 } 848 } 849 INP_WUNLOCK(inp); 850 } 851 INP_INFO_WUNLOCK(pcbinfo); 852 } 853 854 /* 855 * Check for alternatives when higher level complains 856 * about service problems. For now, invalidate cached 857 * routing information. If the route was created dynamically 858 * (by a redirect), time to try a default gateway again. 859 */ 860 void 861 in6_losing(struct inpcb *inp) 862 { 863 864 RO_INVALIDATE_CACHE(&inp->inp_route6); 865 } 866 867 /* 868 * After a routing change, flush old routing 869 * and allocate a (hopefully) better one. 870 */ 871 struct inpcb * 872 in6_rtchange(struct inpcb *inp, int errno __unused) 873 { 874 875 RO_INVALIDATE_CACHE(&inp->inp_route6); 876 return inp; 877 } 878 879 static struct inpcb * 880 in6_pcblookup_lbgroup(const struct inpcbinfo *pcbinfo, 881 const struct in6_addr *laddr, uint16_t lport, const struct in6_addr *faddr, 882 uint16_t fport, int lookupflags) 883 { 884 struct inpcb *local_wild; 885 const struct inpcblbgrouphead *hdr; 886 struct inpcblbgroup *grp; 887 uint32_t idx; 888 889 INP_HASH_LOCK_ASSERT(pcbinfo); 890 891 hdr = &pcbinfo->ipi_lbgrouphashbase[ 892 INP_PCBPORTHASH(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 local_wild = NULL; 904 CK_LIST_FOREACH(grp, hdr, il_list) { 905 #ifdef INET 906 if (!(grp->il_vflag & INP_IPV6)) 907 continue; 908 #endif 909 if (grp->il_lport != lport) 910 continue; 911 912 idx = INP_PCBLBGROUP_PKTHASH(INP6_PCBHASHKEY(faddr), lport, 913 fport) % grp->il_inpcnt; 914 if (IN6_ARE_ADDR_EQUAL(&grp->il6_laddr, laddr)) 915 return (grp->il_inp[idx]); 916 if (IN6_IS_ADDR_UNSPECIFIED(&grp->il6_laddr) && 917 (lookupflags & INPLOOKUP_WILDCARD) != 0) 918 local_wild = grp->il_inp[idx]; 919 } 920 return (local_wild); 921 } 922 923 #ifdef PCBGROUP 924 /* 925 * Lookup PCB in hash list, using pcbgroup tables. 926 */ 927 static struct inpcb * 928 in6_pcblookup_group(struct inpcbinfo *pcbinfo, struct inpcbgroup *pcbgroup, 929 struct in6_addr *faddr, u_int fport_arg, struct in6_addr *laddr, 930 u_int lport_arg, int lookupflags, struct ifnet *ifp) 931 { 932 struct inpcbhead *head; 933 struct inpcb *inp, *tmpinp; 934 u_short fport = fport_arg, lport = lport_arg; 935 bool locked; 936 937 /* 938 * First look for an exact match. 939 */ 940 tmpinp = NULL; 941 INP_GROUP_LOCK(pcbgroup); 942 head = &pcbgroup->ipg_hashbase[INP_PCBHASH( 943 INP6_PCBHASHKEY(faddr), lport, fport, pcbgroup->ipg_hashmask)]; 944 CK_LIST_FOREACH(inp, head, inp_pcbgrouphash) { 945 /* XXX inp locking */ 946 if ((inp->inp_vflag & INP_IPV6) == 0) 947 continue; 948 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) && 949 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 950 inp->inp_fport == fport && 951 inp->inp_lport == lport) { 952 /* 953 * XXX We should be able to directly return 954 * the inp here, without any checks. 955 * Well unless both bound with SO_REUSEPORT? 956 */ 957 if (prison_flag(inp->inp_cred, PR_IP6)) 958 goto found; 959 if (tmpinp == NULL) 960 tmpinp = inp; 961 } 962 } 963 if (tmpinp != NULL) { 964 inp = tmpinp; 965 goto found; 966 } 967 968 /* 969 * Then look for a wildcard match in the pcbgroup. 970 */ 971 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) { 972 struct inpcb *local_wild = NULL, *local_exact = NULL; 973 struct inpcb *jail_wild = NULL; 974 int injail; 975 976 /* 977 * Order of socket selection - we always prefer jails. 978 * 1. jailed, non-wild. 979 * 2. jailed, wild. 980 * 3. non-jailed, non-wild. 981 * 4. non-jailed, wild. 982 */ 983 head = &pcbgroup->ipg_hashbase[ 984 INP_PCBHASH(INADDR_ANY, lport, 0, pcbgroup->ipg_hashmask)]; 985 CK_LIST_FOREACH(inp, head, inp_pcbgrouphash) { 986 /* XXX inp locking */ 987 if ((inp->inp_vflag & INP_IPV6) == 0) 988 continue; 989 990 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 991 inp->inp_lport != lport) { 992 continue; 993 } 994 995 injail = prison_flag(inp->inp_cred, PR_IP6); 996 if (injail) { 997 if (prison_check_ip6(inp->inp_cred, 998 laddr) != 0) 999 continue; 1000 } else { 1001 if (local_exact != NULL) 1002 continue; 1003 } 1004 1005 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) { 1006 if (injail) 1007 goto found; 1008 else 1009 local_exact = inp; 1010 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 1011 if (injail) 1012 jail_wild = inp; 1013 else 1014 local_wild = inp; 1015 } 1016 } /* LIST_FOREACH */ 1017 1018 inp = jail_wild; 1019 if (inp == NULL) 1020 inp = jail_wild; 1021 if (inp == NULL) 1022 inp = local_exact; 1023 if (inp == NULL) 1024 inp = local_wild; 1025 if (inp != NULL) 1026 goto found; 1027 } 1028 1029 /* 1030 * Then look for a wildcard match, if requested. 1031 */ 1032 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) { 1033 struct inpcb *local_wild = NULL, *local_exact = NULL; 1034 struct inpcb *jail_wild = NULL; 1035 int injail; 1036 1037 /* 1038 * Order of socket selection - we always prefer jails. 1039 * 1. jailed, non-wild. 1040 * 2. jailed, wild. 1041 * 3. non-jailed, non-wild. 1042 * 4. non-jailed, wild. 1043 */ 1044 head = &pcbinfo->ipi_wildbase[INP_PCBHASH( 1045 INP6_PCBHASHKEY(&in6addr_any), lport, 0, 1046 pcbinfo->ipi_wildmask)]; 1047 CK_LIST_FOREACH(inp, head, inp_pcbgroup_wild) { 1048 /* XXX inp locking */ 1049 if ((inp->inp_vflag & INP_IPV6) == 0) 1050 continue; 1051 1052 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 1053 inp->inp_lport != lport) { 1054 continue; 1055 } 1056 1057 injail = prison_flag(inp->inp_cred, PR_IP6); 1058 if (injail) { 1059 if (prison_check_ip6(inp->inp_cred, 1060 laddr) != 0) 1061 continue; 1062 } else { 1063 if (local_exact != NULL) 1064 continue; 1065 } 1066 1067 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) { 1068 if (injail) 1069 goto found; 1070 else 1071 local_exact = inp; 1072 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 1073 if (injail) 1074 jail_wild = inp; 1075 else 1076 local_wild = inp; 1077 } 1078 } /* LIST_FOREACH */ 1079 1080 inp = jail_wild; 1081 if (inp == NULL) 1082 inp = jail_wild; 1083 if (inp == NULL) 1084 inp = local_exact; 1085 if (inp == NULL) 1086 inp = local_wild; 1087 if (inp != NULL) 1088 goto found; 1089 } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */ 1090 INP_GROUP_UNLOCK(pcbgroup); 1091 return (NULL); 1092 1093 found: 1094 if (lookupflags & INPLOOKUP_WLOCKPCB) 1095 locked = INP_TRY_WLOCK(inp); 1096 else if (lookupflags & INPLOOKUP_RLOCKPCB) 1097 locked = INP_TRY_RLOCK(inp); 1098 else 1099 panic("%s: locking buf", __func__); 1100 if (!locked) 1101 in_pcbref(inp); 1102 INP_GROUP_UNLOCK(pcbgroup); 1103 if (!locked) { 1104 if (lookupflags & INPLOOKUP_WLOCKPCB) { 1105 INP_WLOCK(inp); 1106 if (in_pcbrele_wlocked(inp)) 1107 return (NULL); 1108 } else { 1109 INP_RLOCK(inp); 1110 if (in_pcbrele_rlocked(inp)) 1111 return (NULL); 1112 } 1113 } 1114 #ifdef INVARIANTS 1115 if (lookupflags & INPLOOKUP_WLOCKPCB) 1116 INP_WLOCK_ASSERT(inp); 1117 else 1118 INP_RLOCK_ASSERT(inp); 1119 #endif 1120 return (inp); 1121 } 1122 #endif /* PCBGROUP */ 1123 1124 /* 1125 * Lookup PCB in hash list. Used in in_pcb.c as well as here. 1126 */ 1127 struct inpcb * 1128 in6_pcblookup_hash_locked(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, 1129 u_int fport_arg, struct in6_addr *laddr, u_int lport_arg, 1130 int lookupflags, struct ifnet *ifp) 1131 { 1132 struct inpcbhead *head; 1133 struct inpcb *inp, *tmpinp; 1134 u_short fport = fport_arg, lport = lport_arg; 1135 1136 KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0, 1137 ("%s: invalid lookup flags %d", __func__, lookupflags)); 1138 1139 INP_HASH_LOCK_ASSERT(pcbinfo); 1140 1141 /* 1142 * First look for an exact match. 1143 */ 1144 tmpinp = NULL; 1145 head = &pcbinfo->ipi_hashbase[INP_PCBHASH( 1146 INP6_PCBHASHKEY(faddr), lport, fport, pcbinfo->ipi_hashmask)]; 1147 CK_LIST_FOREACH(inp, head, inp_hash) { 1148 /* XXX inp locking */ 1149 if ((inp->inp_vflag & INP_IPV6) == 0) 1150 continue; 1151 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) && 1152 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 1153 inp->inp_fport == fport && 1154 inp->inp_lport == lport) { 1155 /* 1156 * XXX We should be able to directly return 1157 * the inp here, without any checks. 1158 * Well unless both bound with SO_REUSEPORT? 1159 */ 1160 if (prison_flag(inp->inp_cred, PR_IP6)) 1161 return (inp); 1162 if (tmpinp == NULL) 1163 tmpinp = inp; 1164 } 1165 } 1166 if (tmpinp != NULL) 1167 return (tmpinp); 1168 1169 /* 1170 * Then look in lb group (for wildcard match). 1171 */ 1172 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) { 1173 inp = in6_pcblookup_lbgroup(pcbinfo, laddr, lport, faddr, 1174 fport, lookupflags); 1175 if (inp != NULL) 1176 return (inp); 1177 } 1178 1179 /* 1180 * Then look for a wildcard match, if requested. 1181 */ 1182 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) { 1183 struct inpcb *local_wild = NULL, *local_exact = NULL; 1184 struct inpcb *jail_wild = NULL; 1185 int injail; 1186 1187 /* 1188 * Order of socket selection - we always prefer jails. 1189 * 1. jailed, non-wild. 1190 * 2. jailed, wild. 1191 * 3. non-jailed, non-wild. 1192 * 4. non-jailed, wild. 1193 */ 1194 head = &pcbinfo->ipi_hashbase[INP_PCBHASH( 1195 INP6_PCBHASHKEY(&in6addr_any), lport, 0, 1196 pcbinfo->ipi_hashmask)]; 1197 CK_LIST_FOREACH(inp, head, inp_hash) { 1198 /* XXX inp locking */ 1199 if ((inp->inp_vflag & INP_IPV6) == 0) 1200 continue; 1201 1202 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 1203 inp->inp_lport != lport) { 1204 continue; 1205 } 1206 1207 injail = prison_flag(inp->inp_cred, PR_IP6); 1208 if (injail) { 1209 if (prison_check_ip6(inp->inp_cred, 1210 laddr) != 0) 1211 continue; 1212 } else { 1213 if (local_exact != NULL) 1214 continue; 1215 } 1216 1217 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) { 1218 if (injail) 1219 return (inp); 1220 else 1221 local_exact = inp; 1222 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 1223 if (injail) 1224 jail_wild = inp; 1225 else 1226 local_wild = inp; 1227 } 1228 } /* LIST_FOREACH */ 1229 1230 if (jail_wild != NULL) 1231 return (jail_wild); 1232 if (local_exact != NULL) 1233 return (local_exact); 1234 if (local_wild != NULL) 1235 return (local_wild); 1236 } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */ 1237 1238 /* 1239 * Not found. 1240 */ 1241 return (NULL); 1242 } 1243 1244 /* 1245 * Lookup PCB in hash list, using pcbinfo tables. This variation locks the 1246 * hash list lock, and will return the inpcb locked (i.e., requires 1247 * INPLOOKUP_LOCKPCB). 1248 */ 1249 static struct inpcb * 1250 in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, 1251 u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags, 1252 struct ifnet *ifp) 1253 { 1254 struct inpcb *inp; 1255 1256 INP_HASH_RLOCK(pcbinfo); 1257 inp = in6_pcblookup_hash_locked(pcbinfo, faddr, fport, laddr, lport, 1258 (lookupflags & ~(INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)), ifp); 1259 if (inp != NULL) { 1260 if (lookupflags & INPLOOKUP_WLOCKPCB) { 1261 INP_WLOCK(inp); 1262 if (__predict_false(inp->inp_flags2 & INP_FREED)) { 1263 INP_WUNLOCK(inp); 1264 inp = NULL; 1265 } 1266 } else if (lookupflags & INPLOOKUP_RLOCKPCB) { 1267 INP_RLOCK(inp); 1268 if (__predict_false(inp->inp_flags2 & INP_FREED)) { 1269 INP_RUNLOCK(inp); 1270 inp = NULL; 1271 } 1272 } else 1273 panic("%s: locking bug", __func__); 1274 #ifdef INVARIANTS 1275 if (inp != NULL) { 1276 if (lookupflags & INPLOOKUP_WLOCKPCB) 1277 INP_WLOCK_ASSERT(inp); 1278 else 1279 INP_RLOCK_ASSERT(inp); 1280 } 1281 #endif 1282 } 1283 INP_HASH_RUNLOCK(pcbinfo); 1284 return (inp); 1285 } 1286 1287 /* 1288 * Public inpcb lookup routines, accepting a 4-tuple, and optionally, an mbuf 1289 * from which a pre-calculated hash value may be extracted. 1290 * 1291 * Possibly more of this logic should be in in6_pcbgroup.c. 1292 */ 1293 struct inpcb * 1294 in6_pcblookup(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, u_int fport, 1295 struct in6_addr *laddr, u_int lport, int lookupflags, struct ifnet *ifp) 1296 { 1297 #if defined(PCBGROUP) && !defined(RSS) 1298 struct inpcbgroup *pcbgroup; 1299 #endif 1300 1301 KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0, 1302 ("%s: invalid lookup flags %d", __func__, lookupflags)); 1303 KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0, 1304 ("%s: LOCKPCB not set", __func__)); 1305 1306 /* 1307 * When not using RSS, use connection groups in preference to the 1308 * reservation table when looking up 4-tuples. When using RSS, just 1309 * use the reservation table, due to the cost of the Toeplitz hash 1310 * in software. 1311 * 1312 * XXXRW: This policy belongs in the pcbgroup code, as in principle 1313 * we could be doing RSS with a non-Toeplitz hash that is affordable 1314 * in software. 1315 */ 1316 #if defined(PCBGROUP) && !defined(RSS) 1317 if (in_pcbgroup_enabled(pcbinfo)) { 1318 pcbgroup = in6_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr, 1319 fport); 1320 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, fport, 1321 laddr, lport, lookupflags, ifp)); 1322 } 1323 #endif 1324 return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport, 1325 lookupflags, ifp)); 1326 } 1327 1328 struct inpcb * 1329 in6_pcblookup_mbuf(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, 1330 u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags, 1331 struct ifnet *ifp, struct mbuf *m) 1332 { 1333 #ifdef PCBGROUP 1334 struct inpcbgroup *pcbgroup; 1335 #endif 1336 1337 KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0, 1338 ("%s: invalid lookup flags %d", __func__, lookupflags)); 1339 KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0, 1340 ("%s: LOCKPCB not set", __func__)); 1341 1342 #ifdef PCBGROUP 1343 /* 1344 * If we can use a hardware-generated hash to look up the connection 1345 * group, use that connection group to find the inpcb. Otherwise 1346 * fall back on a software hash -- or the reservation table if we're 1347 * using RSS. 1348 * 1349 * XXXRW: As above, that policy belongs in the pcbgroup code. 1350 */ 1351 if (in_pcbgroup_enabled(pcbinfo) && 1352 M_HASHTYPE_TEST(m, M_HASHTYPE_NONE) == 0) { 1353 pcbgroup = in6_pcbgroup_byhash(pcbinfo, M_HASHTYPE_GET(m), 1354 m->m_pkthdr.flowid); 1355 if (pcbgroup != NULL) 1356 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, 1357 fport, laddr, lport, lookupflags, ifp)); 1358 #ifndef RSS 1359 pcbgroup = in6_pcbgroup_bytuple(pcbinfo, laddr, lport, faddr, 1360 fport); 1361 return (in6_pcblookup_group(pcbinfo, pcbgroup, faddr, fport, 1362 laddr, lport, lookupflags, ifp)); 1363 #endif 1364 } 1365 #endif 1366 return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport, 1367 lookupflags, ifp)); 1368 } 1369 1370 void 1371 init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m, int srcordst) 1372 { 1373 struct ip6_hdr *ip; 1374 1375 ip = mtod(m, struct ip6_hdr *); 1376 bzero(sin6, sizeof(*sin6)); 1377 sin6->sin6_len = sizeof(*sin6); 1378 sin6->sin6_family = AF_INET6; 1379 sin6->sin6_addr = srcordst ? ip->ip6_dst : ip->ip6_src; 1380 1381 (void)sa6_recoverscope(sin6); /* XXX: should catch errors... */ 1382 1383 return; 1384 }
Cache object: a6b66399b3bdbca572ce793a08f0f3e9
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