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_route.h" 76 #include "opt_rss.h" 77 78 #include <sys/hash.h> 79 #include <sys/param.h> 80 #include <sys/systm.h> 81 #include <sys/malloc.h> 82 #include <sys/mbuf.h> 83 #include <sys/domain.h> 84 #include <sys/protosw.h> 85 #include <sys/socket.h> 86 #include <sys/socketvar.h> 87 #include <sys/sockio.h> 88 #include <sys/errno.h> 89 #include <sys/time.h> 90 #include <sys/priv.h> 91 #include <sys/proc.h> 92 #include <sys/jail.h> 93 94 #include <vm/uma.h> 95 96 #include <net/if.h> 97 #include <net/if_var.h> 98 #include <net/if_llatbl.h> 99 #include <net/if_types.h> 100 #include <net/route.h> 101 #include <net/route/nhop.h> 102 103 #include <netinet/in.h> 104 #include <netinet/in_var.h> 105 #include <netinet/in_systm.h> 106 #include <netinet/tcp_var.h> 107 #include <netinet/ip6.h> 108 #include <netinet/ip_var.h> 109 110 #include <netinet6/ip6_var.h> 111 #include <netinet6/nd6.h> 112 #include <netinet/in_pcb.h> 113 #include <netinet/in_pcb_var.h> 114 #include <netinet6/in6_pcb.h> 115 #include <netinet6/in6_fib.h> 116 #include <netinet6/scope6_var.h> 117 118 int 119 in6_pcbsetport(struct in6_addr *laddr, struct inpcb *inp, struct ucred *cred) 120 { 121 struct socket *so = inp->inp_socket; 122 u_int16_t lport = 0; 123 int error, lookupflags = 0; 124 #ifdef INVARIANTS 125 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 126 #endif 127 128 INP_WLOCK_ASSERT(inp); 129 INP_HASH_WLOCK_ASSERT(pcbinfo); 130 131 error = prison_local_ip6(cred, laddr, 132 ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0)); 133 if (error) 134 return(error); 135 136 /* XXX: this is redundant when called from in6_pcbbind */ 137 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT|SO_REUSEPORT_LB)) == 0) 138 lookupflags = INPLOOKUP_WILDCARD; 139 140 inp->inp_flags |= INP_ANONPORT; 141 142 error = in_pcb_lport(inp, NULL, &lport, cred, lookupflags); 143 if (error != 0) 144 return (error); 145 146 inp->inp_lport = lport; 147 if (in_pcbinshash(inp) != 0) { 148 inp->in6p_laddr = in6addr_any; 149 inp->inp_lport = 0; 150 return (EAGAIN); 151 } 152 153 return (0); 154 } 155 156 int 157 in6_pcbbind(struct inpcb *inp, struct sockaddr *nam, 158 struct ucred *cred) 159 { 160 struct socket *so = inp->inp_socket; 161 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)NULL; 162 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 163 u_short lport = 0; 164 int error, lookupflags = 0; 165 int reuseport = (so->so_options & SO_REUSEPORT); 166 167 /* 168 * XXX: Maybe we could let SO_REUSEPORT_LB set SO_REUSEPORT bit here 169 * so that we don't have to add to the (already messy) code below. 170 */ 171 int reuseport_lb = (so->so_options & SO_REUSEPORT_LB); 172 173 INP_WLOCK_ASSERT(inp); 174 INP_HASH_WLOCK_ASSERT(pcbinfo); 175 176 if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) 177 return (EINVAL); 178 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT|SO_REUSEPORT_LB)) == 0) 179 lookupflags = INPLOOKUP_WILDCARD; 180 if (nam == NULL) { 181 if ((error = prison_local_ip6(cred, &inp->in6p_laddr, 182 ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0) 183 return (error); 184 } else { 185 sin6 = (struct sockaddr_in6 *)nam; 186 KASSERT(sin6->sin6_family == AF_INET6, 187 ("%s: invalid address family for %p", __func__, sin6)); 188 KASSERT(sin6->sin6_len == sizeof(*sin6), 189 ("%s: invalid address length for %p", __func__, sin6)); 190 191 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0) 192 return(error); 193 194 if ((error = prison_local_ip6(cred, &sin6->sin6_addr, 195 ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0))) != 0) 196 return (error); 197 198 lport = sin6->sin6_port; 199 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 200 /* 201 * Treat SO_REUSEADDR as SO_REUSEPORT for multicast; 202 * allow compepte duplication of binding if 203 * SO_REUSEPORT is set, or if SO_REUSEADDR is set 204 * and a multicast address is bound on both 205 * new and duplicated sockets. 206 */ 207 if ((so->so_options & (SO_REUSEADDR|SO_REUSEPORT)) != 0) 208 reuseport = SO_REUSEADDR|SO_REUSEPORT; 209 /* 210 * XXX: How to deal with SO_REUSEPORT_LB here? 211 * Treat same as SO_REUSEPORT for now. 212 */ 213 if ((so->so_options & 214 (SO_REUSEADDR|SO_REUSEPORT_LB)) != 0) 215 reuseport_lb = SO_REUSEADDR|SO_REUSEPORT_LB; 216 } else if (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 217 struct epoch_tracker et; 218 struct ifaddr *ifa; 219 220 sin6->sin6_port = 0; /* yech... */ 221 NET_EPOCH_ENTER(et); 222 if ((ifa = ifa_ifwithaddr((struct sockaddr *)sin6)) == 223 NULL && 224 (inp->inp_flags & INP_BINDANY) == 0) { 225 NET_EPOCH_EXIT(et); 226 return (EADDRNOTAVAIL); 227 } 228 229 /* 230 * XXX: bind to an anycast address might accidentally 231 * cause sending a packet with anycast source address. 232 * We should allow to bind to a deprecated address, since 233 * the application dares to use it. 234 */ 235 if (ifa != NULL && 236 ((struct in6_ifaddr *)ifa)->ia6_flags & 237 (IN6_IFF_ANYCAST|IN6_IFF_NOTREADY|IN6_IFF_DETACHED)) { 238 NET_EPOCH_EXIT(et); 239 return (EADDRNOTAVAIL); 240 } 241 NET_EPOCH_EXIT(et); 242 } 243 if (lport) { 244 struct inpcb *t; 245 struct tcptw *tw; 246 247 /* GROSS */ 248 if (ntohs(lport) <= V_ipport_reservedhigh && 249 ntohs(lport) >= V_ipport_reservedlow && 250 priv_check_cred(cred, PRIV_NETINET_RESERVEDPORT)) 251 return (EACCES); 252 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr) && 253 priv_check_cred(inp->inp_cred, PRIV_NETINET_REUSEPORT) != 0) { 254 t = in6_pcblookup_local(pcbinfo, 255 &sin6->sin6_addr, lport, 256 INPLOOKUP_WILDCARD, cred); 257 if (t && 258 ((inp->inp_flags2 & INP_BINDMULTI) == 0) && 259 ((t->inp_flags & INP_TIMEWAIT) == 0) && 260 (so->so_type != SOCK_STREAM || 261 IN6_IS_ADDR_UNSPECIFIED(&t->in6p_faddr)) && 262 (!IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) || 263 !IN6_IS_ADDR_UNSPECIFIED(&t->in6p_laddr) || 264 (t->inp_flags2 & INP_REUSEPORT) || 265 (t->inp_flags2 & INP_REUSEPORT_LB) == 0) && 266 (inp->inp_cred->cr_uid != 267 t->inp_cred->cr_uid)) 268 return (EADDRINUSE); 269 270 /* 271 * If the socket is a BINDMULTI socket, then 272 * the credentials need to match and the 273 * original socket also has to have been bound 274 * with BINDMULTI. 275 */ 276 if (t && (! in_pcbbind_check_bindmulti(inp, t))) 277 return (EADDRINUSE); 278 279 #ifdef INET 280 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 && 281 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 282 struct sockaddr_in sin; 283 284 in6_sin6_2_sin(&sin, sin6); 285 t = in_pcblookup_local(pcbinfo, 286 sin.sin_addr, lport, 287 INPLOOKUP_WILDCARD, cred); 288 if (t && 289 ((inp->inp_flags2 & INP_BINDMULTI) == 0) && 290 ((t->inp_flags & 291 INP_TIMEWAIT) == 0) && 292 (so->so_type != SOCK_STREAM || 293 ntohl(t->inp_faddr.s_addr) == 294 INADDR_ANY) && 295 (inp->inp_cred->cr_uid != 296 t->inp_cred->cr_uid)) 297 return (EADDRINUSE); 298 299 if (t && (! in_pcbbind_check_bindmulti(inp, t))) 300 return (EADDRINUSE); 301 } 302 #endif 303 } 304 t = in6_pcblookup_local(pcbinfo, &sin6->sin6_addr, 305 lport, lookupflags, cred); 306 if (t && (t->inp_flags & INP_TIMEWAIT)) { 307 /* 308 * XXXRW: If an incpb has had its timewait 309 * state recycled, we treat the address as 310 * being in use (for now). This is better 311 * than a panic, but not desirable. 312 */ 313 tw = intotw(t); 314 if (tw == NULL || 315 ((reuseport & tw->tw_so_options) == 0 && 316 (reuseport_lb & tw->tw_so_options) == 0)) 317 return (EADDRINUSE); 318 } else if (t && (reuseport & inp_so_options(t)) == 0 && 319 (reuseport_lb & inp_so_options(t)) == 0) { 320 return (EADDRINUSE); 321 } 322 #ifdef INET 323 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0 && 324 IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 325 struct sockaddr_in sin; 326 327 in6_sin6_2_sin(&sin, sin6); 328 t = in_pcblookup_local(pcbinfo, sin.sin_addr, 329 lport, lookupflags, cred); 330 if (t && t->inp_flags & INP_TIMEWAIT) { 331 tw = intotw(t); 332 if (tw == NULL) 333 return (EADDRINUSE); 334 if ((reuseport & tw->tw_so_options) == 0 335 && (reuseport_lb & tw->tw_so_options) == 0 336 && (ntohl(t->inp_laddr.s_addr) != 337 INADDR_ANY || ((inp->inp_vflag & 338 INP_IPV6PROTO) == 339 (t->inp_vflag & INP_IPV6PROTO)))) 340 return (EADDRINUSE); 341 } else if (t && 342 (reuseport & inp_so_options(t)) == 0 && 343 (reuseport_lb & inp_so_options(t)) == 0 && 344 (ntohl(t->inp_laddr.s_addr) != INADDR_ANY || 345 (t->inp_vflag & INP_IPV6PROTO) != 0)) { 346 return (EADDRINUSE); 347 } 348 } 349 #endif 350 } 351 inp->in6p_laddr = sin6->sin6_addr; 352 } 353 if (lport == 0) { 354 if ((error = in6_pcbsetport(&inp->in6p_laddr, inp, cred)) != 0) { 355 /* Undo an address bind that may have occurred. */ 356 inp->in6p_laddr = in6addr_any; 357 return (error); 358 } 359 } else { 360 inp->inp_lport = lport; 361 if (in_pcbinshash(inp) != 0) { 362 inp->in6p_laddr = in6addr_any; 363 inp->inp_lport = 0; 364 return (EAGAIN); 365 } 366 } 367 return (0); 368 } 369 370 /* 371 * Transform old in6_pcbconnect() into an inner subroutine for new 372 * in6_pcbconnect(): Do some validity-checking on the remote 373 * address (in mbuf 'nam') and then determine local host address 374 * (i.e., which interface) to use to access that remote host. 375 * 376 * This preserves definition of in6_pcbconnect(), while supporting a 377 * slightly different version for T/TCP. (This is more than 378 * a bit of a kludge, but cleaning up the internal interfaces would 379 * have forced minor changes in every protocol). 380 */ 381 static int 382 in6_pcbladdr(struct inpcb *inp, struct sockaddr_in6 *sin6, 383 struct in6_addr *plocal_addr6) 384 { 385 int error = 0; 386 int scope_ambiguous = 0; 387 struct in6_addr in6a; 388 struct epoch_tracker et; 389 390 INP_WLOCK_ASSERT(inp); 391 INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo); /* XXXRW: why? */ 392 393 if (sin6->sin6_port == 0) 394 return (EADDRNOTAVAIL); 395 396 if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone) 397 scope_ambiguous = 1; 398 if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0) 399 return(error); 400 401 if (!CK_STAILQ_EMPTY(&V_in6_ifaddrhead)) { 402 /* 403 * If the destination address is UNSPECIFIED addr, 404 * use the loopback addr, e.g ::1. 405 */ 406 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 407 sin6->sin6_addr = in6addr_loopback; 408 } 409 if ((error = prison_remote_ip6(inp->inp_cred, &sin6->sin6_addr)) != 0) 410 return (error); 411 412 NET_EPOCH_ENTER(et); 413 error = in6_selectsrc_socket(sin6, inp->in6p_outputopts, 414 inp, inp->inp_cred, scope_ambiguous, &in6a, NULL); 415 NET_EPOCH_EXIT(et); 416 if (error) 417 return (error); 418 419 /* 420 * Do not update this earlier, in case we return with an error. 421 * 422 * XXX: this in6_selectsrc_socket result might replace the bound local 423 * address with the address specified by setsockopt(IPV6_PKTINFO). 424 * Is it the intended behavior? 425 */ 426 *plocal_addr6 = in6a; 427 428 /* 429 * Don't do pcblookup call here; return interface in 430 * plocal_addr6 431 * and exit to caller, that will do the lookup. 432 */ 433 434 return (0); 435 } 436 437 /* 438 * Outer subroutine: 439 * Connect from a socket to a specified address. 440 * Both address and port must be specified in argument sin. 441 * If don't have a local address for this socket yet, 442 * then pick one. 443 */ 444 int 445 in6_pcbconnect_mbuf(struct inpcb *inp, struct sockaddr *nam, 446 struct ucred *cred, struct mbuf *m, bool rehash) 447 { 448 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo; 449 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; 450 struct sockaddr_in6 laddr6; 451 int error; 452 453 KASSERT(sin6->sin6_family == AF_INET6, 454 ("%s: invalid address family for %p", __func__, sin6)); 455 KASSERT(sin6->sin6_len == sizeof(*sin6), 456 ("%s: invalid address length for %p", __func__, sin6)); 457 458 bzero(&laddr6, sizeof(laddr6)); 459 laddr6.sin6_family = AF_INET6; 460 461 INP_WLOCK_ASSERT(inp); 462 INP_HASH_WLOCK_ASSERT(pcbinfo); 463 464 #ifdef ROUTE_MPATH 465 if (CALC_FLOWID_OUTBOUND) { 466 uint32_t hash_type, hash_val; 467 468 hash_val = fib6_calc_software_hash(&inp->in6p_laddr, 469 &sin6->sin6_addr, 0, sin6->sin6_port, 470 inp->inp_socket->so_proto->pr_protocol, &hash_type); 471 inp->inp_flowid = hash_val; 472 inp->inp_flowtype = hash_type; 473 } 474 #endif 475 /* 476 * Call inner routine, to assign local interface address. 477 * in6_pcbladdr() may automatically fill in sin6_scope_id. 478 */ 479 if ((error = in6_pcbladdr(inp, sin6, &laddr6.sin6_addr)) != 0) 480 return (error); 481 482 if (in6_pcblookup_hash_locked(pcbinfo, &sin6->sin6_addr, 483 sin6->sin6_port, 484 IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) 485 ? &laddr6.sin6_addr : &inp->in6p_laddr, 486 inp->inp_lport, 0, NULL, M_NODOM) != NULL) { 487 return (EADDRINUSE); 488 } 489 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 490 if (inp->inp_lport == 0) { 491 /* 492 * rehash was required to be true in the past for 493 * this case; retain that convention. However, 494 * we now call in_pcb_lport_dest rather than 495 * in6_pcbbind; the former does not insert into 496 * the hash table, the latter does. Change rehash 497 * to false to do the in_pcbinshash below. 498 */ 499 KASSERT(rehash == true, 500 ("Rehashing required for unbound inps")); 501 rehash = false; 502 error = in_pcb_lport_dest(inp, 503 (struct sockaddr *) &laddr6, &inp->inp_lport, 504 (struct sockaddr *) sin6, sin6->sin6_port, cred, 505 INPLOOKUP_WILDCARD); 506 if (error) 507 return (error); 508 } 509 inp->in6p_laddr = laddr6.sin6_addr; 510 } 511 inp->in6p_faddr = sin6->sin6_addr; 512 inp->inp_fport = sin6->sin6_port; 513 /* update flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 514 inp->inp_flow &= ~IPV6_FLOWLABEL_MASK; 515 if (inp->inp_flags & IN6P_AUTOFLOWLABEL) 516 inp->inp_flow |= 517 (htonl(ip6_randomflowlabel()) & IPV6_FLOWLABEL_MASK); 518 519 if (rehash) { 520 in_pcbrehash(inp); 521 } else { 522 in_pcbinshash(inp); 523 } 524 525 return (0); 526 } 527 528 int 529 in6_pcbconnect(struct inpcb *inp, struct sockaddr *nam, struct ucred *cred) 530 { 531 532 return (in6_pcbconnect_mbuf(inp, nam, cred, NULL, true)); 533 } 534 535 void 536 in6_pcbdisconnect(struct inpcb *inp) 537 { 538 539 INP_WLOCK_ASSERT(inp); 540 INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo); 541 542 bzero((caddr_t)&inp->in6p_faddr, sizeof(inp->in6p_faddr)); 543 inp->inp_fport = 0; 544 /* clear flowinfo - draft-itojun-ipv6-flowlabel-api-00 */ 545 inp->inp_flow &= ~IPV6_FLOWLABEL_MASK; 546 in_pcbrehash(inp); 547 } 548 549 struct sockaddr * 550 in6_sockaddr(in_port_t port, struct in6_addr *addr_p) 551 { 552 struct sockaddr_in6 *sin6; 553 554 sin6 = malloc(sizeof *sin6, M_SONAME, M_WAITOK); 555 bzero(sin6, sizeof *sin6); 556 sin6->sin6_family = AF_INET6; 557 sin6->sin6_len = sizeof(*sin6); 558 sin6->sin6_port = port; 559 sin6->sin6_addr = *addr_p; 560 (void)sa6_recoverscope(sin6); /* XXX: should catch errors */ 561 562 return (struct sockaddr *)sin6; 563 } 564 565 struct sockaddr * 566 in6_v4mapsin6_sockaddr(in_port_t port, struct in_addr *addr_p) 567 { 568 struct sockaddr_in sin; 569 struct sockaddr_in6 *sin6_p; 570 571 bzero(&sin, sizeof sin); 572 sin.sin_family = AF_INET; 573 sin.sin_len = sizeof(sin); 574 sin.sin_port = port; 575 sin.sin_addr = *addr_p; 576 577 sin6_p = malloc(sizeof *sin6_p, M_SONAME, 578 M_WAITOK); 579 in6_sin_2_v4mapsin6(&sin, sin6_p); 580 581 return (struct sockaddr *)sin6_p; 582 } 583 584 int 585 in6_getsockaddr(struct socket *so, struct sockaddr **nam) 586 { 587 struct inpcb *inp; 588 struct in6_addr addr; 589 in_port_t port; 590 591 inp = sotoinpcb(so); 592 KASSERT(inp != NULL, ("in6_getsockaddr: inp == NULL")); 593 594 INP_RLOCK(inp); 595 port = inp->inp_lport; 596 addr = inp->in6p_laddr; 597 INP_RUNLOCK(inp); 598 599 *nam = in6_sockaddr(port, &addr); 600 return 0; 601 } 602 603 int 604 in6_getpeeraddr(struct socket *so, struct sockaddr **nam) 605 { 606 struct inpcb *inp; 607 struct in6_addr addr; 608 in_port_t port; 609 610 inp = sotoinpcb(so); 611 KASSERT(inp != NULL, ("in6_getpeeraddr: inp == NULL")); 612 613 INP_RLOCK(inp); 614 port = inp->inp_fport; 615 addr = inp->in6p_faddr; 616 INP_RUNLOCK(inp); 617 618 *nam = in6_sockaddr(port, &addr); 619 return 0; 620 } 621 622 int 623 in6_mapped_sockaddr(struct socket *so, struct sockaddr **nam) 624 { 625 struct inpcb *inp; 626 int error; 627 628 inp = sotoinpcb(so); 629 KASSERT(inp != NULL, ("in6_mapped_sockaddr: inp == NULL")); 630 631 #ifdef INET 632 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) { 633 error = in_getsockaddr(so, nam); 634 if (error == 0) 635 in6_sin_2_v4mapsin6_in_sock(nam); 636 } else 637 #endif 638 { 639 /* scope issues will be handled in in6_getsockaddr(). */ 640 error = in6_getsockaddr(so, nam); 641 } 642 643 return error; 644 } 645 646 int 647 in6_mapped_peeraddr(struct socket *so, struct sockaddr **nam) 648 { 649 struct inpcb *inp; 650 int error; 651 652 inp = sotoinpcb(so); 653 KASSERT(inp != NULL, ("in6_mapped_peeraddr: inp == NULL")); 654 655 #ifdef INET 656 if ((inp->inp_vflag & (INP_IPV4 | INP_IPV6)) == INP_IPV4) { 657 error = in_getpeeraddr(so, nam); 658 if (error == 0) 659 in6_sin_2_v4mapsin6_in_sock(nam); 660 } else 661 #endif 662 /* scope issues will be handled in in6_getpeeraddr(). */ 663 error = in6_getpeeraddr(so, nam); 664 665 return error; 666 } 667 668 /* 669 * Pass some notification to all connections of a protocol 670 * associated with address dst. The local address and/or port numbers 671 * may be specified to limit the search. The "usual action" will be 672 * taken, depending on the ctlinput cmd. The caller must filter any 673 * cmds that are uninteresting (e.g., no error in the map). 674 * Call the protocol specific routine (if any) to report 675 * any errors for each matching socket. 676 */ 677 static bool 678 inp_match6(const struct inpcb *inp, void *v __unused) 679 { 680 681 return ((inp->inp_vflag & INP_IPV6) != 0); 682 } 683 void 684 in6_pcbnotify(struct inpcbinfo *pcbinfo, struct sockaddr *dst, 685 u_int fport_arg, const struct sockaddr *src, u_int lport_arg, 686 int cmd, void *cmdarg, 687 struct inpcb *(*notify)(struct inpcb *, int)) 688 { 689 struct inpcb_iterator inpi = INP_ITERATOR(pcbinfo, INPLOOKUP_WLOCKPCB, 690 inp_match6, NULL); 691 struct inpcb *inp; 692 struct sockaddr_in6 sa6_src, *sa6_dst; 693 u_short fport = fport_arg, lport = lport_arg; 694 u_int32_t flowinfo; 695 int errno; 696 697 if ((unsigned)cmd >= PRC_NCMDS || dst->sa_family != AF_INET6) 698 return; 699 700 sa6_dst = (struct sockaddr_in6 *)dst; 701 if (IN6_IS_ADDR_UNSPECIFIED(&sa6_dst->sin6_addr)) 702 return; 703 704 /* 705 * note that src can be NULL when we get notify by local fragmentation. 706 */ 707 sa6_src = (src == NULL) ? sa6_any : *(const struct sockaddr_in6 *)src; 708 flowinfo = sa6_src.sin6_flowinfo; 709 710 /* 711 * Redirects go to all references to the destination, 712 * and use in6_rtchange to invalidate the route cache. 713 * Dead host indications: also use in6_rtchange to invalidate 714 * the cache, and deliver the error to all the sockets. 715 * Otherwise, if we have knowledge of the local port and address, 716 * deliver only to that socket. 717 */ 718 if (PRC_IS_REDIRECT(cmd) || cmd == PRC_HOSTDEAD) { 719 fport = 0; 720 lport = 0; 721 bzero((caddr_t)&sa6_src.sin6_addr, sizeof(sa6_src.sin6_addr)); 722 723 if (cmd != PRC_HOSTDEAD) 724 notify = in6_rtchange; 725 } 726 errno = inet6ctlerrmap[cmd]; 727 while ((inp = inp_next(&inpi)) != NULL) { 728 INP_WLOCK_ASSERT(inp); 729 /* 730 * If the error designates a new path MTU for a destination 731 * and the application (associated with this socket) wanted to 732 * know the value, notify. 733 * XXX: should we avoid to notify the value to TCP sockets? 734 */ 735 if (cmd == PRC_MSGSIZE && cmdarg != NULL) 736 ip6_notify_pmtu(inp, (struct sockaddr_in6 *)dst, 737 *(u_int32_t *)cmdarg); 738 739 /* 740 * Detect if we should notify the error. If no source and 741 * destination ports are specified, but non-zero flowinfo and 742 * local address match, notify the error. This is the case 743 * when the error is delivered with an encrypted buffer 744 * by ESP. Otherwise, just compare addresses and ports 745 * as usual. 746 */ 747 if (lport == 0 && fport == 0 && flowinfo && 748 inp->inp_socket != NULL && 749 flowinfo == (inp->inp_flow & IPV6_FLOWLABEL_MASK) && 750 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &sa6_src.sin6_addr)) 751 goto do_notify; 752 else if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, 753 &sa6_dst->sin6_addr) || 754 inp->inp_socket == 0 || 755 (lport && inp->inp_lport != lport) || 756 (!IN6_IS_ADDR_UNSPECIFIED(&sa6_src.sin6_addr) && 757 !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, 758 &sa6_src.sin6_addr)) || 759 (fport && inp->inp_fport != fport)) { 760 continue; 761 } 762 763 do_notify: 764 if (notify) 765 (*notify)(inp, errno); 766 } 767 } 768 769 /* 770 * Lookup a PCB based on the local address and port. Caller must hold the 771 * hash lock. No inpcb locks or references are acquired. 772 */ 773 struct inpcb * 774 in6_pcblookup_local(struct inpcbinfo *pcbinfo, struct in6_addr *laddr, 775 u_short lport, int lookupflags, struct ucred *cred) 776 { 777 struct inpcb *inp; 778 int matchwild = 3, wildcard; 779 780 KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0, 781 ("%s: invalid lookup flags %d", __func__, lookupflags)); 782 783 INP_HASH_LOCK_ASSERT(pcbinfo); 784 785 if ((lookupflags & INPLOOKUP_WILDCARD) == 0) { 786 struct inpcbhead *head; 787 /* 788 * Look for an unconnected (wildcard foreign addr) PCB that 789 * matches the local address and port we're looking for. 790 */ 791 head = &pcbinfo->ipi_hashbase[INP_PCBHASH_WILD(lport, 792 pcbinfo->ipi_hashmask)]; 793 CK_LIST_FOREACH(inp, head, inp_hash) { 794 /* XXX inp locking */ 795 if ((inp->inp_vflag & INP_IPV6) == 0) 796 continue; 797 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) && 798 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 799 inp->inp_lport == lport) { 800 /* Found. */ 801 if (cred == NULL || 802 prison_equal_ip6(cred->cr_prison, 803 inp->inp_cred->cr_prison)) 804 return (inp); 805 } 806 } 807 /* 808 * Not found. 809 */ 810 return (NULL); 811 } else { 812 struct inpcbporthead *porthash; 813 struct inpcbport *phd; 814 struct inpcb *match = NULL; 815 /* 816 * Best fit PCB lookup. 817 * 818 * First see if this local port is in use by looking on the 819 * port hash list. 820 */ 821 porthash = &pcbinfo->ipi_porthashbase[INP_PCBPORTHASH(lport, 822 pcbinfo->ipi_porthashmask)]; 823 CK_LIST_FOREACH(phd, porthash, phd_hash) { 824 if (phd->phd_port == lport) 825 break; 826 } 827 if (phd != NULL) { 828 /* 829 * Port is in use by one or more PCBs. Look for best 830 * fit. 831 */ 832 CK_LIST_FOREACH(inp, &phd->phd_pcblist, inp_portlist) { 833 wildcard = 0; 834 if (cred != NULL && 835 !prison_equal_ip6(cred->cr_prison, 836 inp->inp_cred->cr_prison)) 837 continue; 838 /* XXX inp locking */ 839 if ((inp->inp_vflag & INP_IPV6) == 0) 840 continue; 841 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) 842 wildcard++; 843 if (!IN6_IS_ADDR_UNSPECIFIED( 844 &inp->in6p_laddr)) { 845 if (IN6_IS_ADDR_UNSPECIFIED(laddr)) 846 wildcard++; 847 else if (!IN6_ARE_ADDR_EQUAL( 848 &inp->in6p_laddr, laddr)) 849 continue; 850 } else { 851 if (!IN6_IS_ADDR_UNSPECIFIED(laddr)) 852 wildcard++; 853 } 854 if (wildcard < matchwild) { 855 match = inp; 856 matchwild = wildcard; 857 if (matchwild == 0) 858 break; 859 } 860 } 861 } 862 return (match); 863 } 864 } 865 866 static bool 867 in6_multi_match(const struct inpcb *inp, void *v __unused) 868 { 869 870 if ((inp->inp_vflag & INP_IPV6) && inp->in6p_moptions != NULL) 871 return (true); 872 else 873 return (false); 874 } 875 876 void 877 in6_pcbpurgeif0(struct inpcbinfo *pcbinfo, struct ifnet *ifp) 878 { 879 struct inpcb_iterator inpi = INP_ITERATOR(pcbinfo, INPLOOKUP_RLOCKPCB, 880 in6_multi_match, NULL); 881 struct inpcb *inp; 882 struct in6_multi *inm; 883 struct in6_mfilter *imf; 884 struct ip6_moptions *im6o; 885 886 IN6_MULTI_LOCK_ASSERT(); 887 888 while ((inp = inp_next(&inpi)) != NULL) { 889 INP_RLOCK_ASSERT(inp); 890 891 im6o = inp->in6p_moptions; 892 /* 893 * Unselect the outgoing ifp for multicast if it 894 * is being detached. 895 */ 896 if (im6o->im6o_multicast_ifp == ifp) 897 im6o->im6o_multicast_ifp = NULL; 898 /* 899 * Drop multicast group membership if we joined 900 * through the interface being detached. 901 */ 902 restart: 903 IP6_MFILTER_FOREACH(imf, &im6o->im6o_head) { 904 if ((inm = imf->im6f_in6m) == NULL) 905 continue; 906 if (inm->in6m_ifp != ifp) 907 continue; 908 ip6_mfilter_remove(&im6o->im6o_head, imf); 909 in6_leavegroup_locked(inm, NULL); 910 ip6_mfilter_free(imf); 911 goto restart; 912 } 913 } 914 } 915 916 /* 917 * Check for alternatives when higher level complains 918 * about service problems. For now, invalidate cached 919 * routing information. If the route was created dynamically 920 * (by a redirect), time to try a default gateway again. 921 */ 922 void 923 in6_losing(struct inpcb *inp) 924 { 925 926 RO_INVALIDATE_CACHE(&inp->inp_route6); 927 } 928 929 /* 930 * After a routing change, flush old routing 931 * and allocate a (hopefully) better one. 932 */ 933 struct inpcb * 934 in6_rtchange(struct inpcb *inp, int errno __unused) 935 { 936 937 RO_INVALIDATE_CACHE(&inp->inp_route6); 938 return inp; 939 } 940 941 static struct inpcb * 942 in6_pcblookup_lbgroup(const struct inpcbinfo *pcbinfo, 943 const struct in6_addr *laddr, uint16_t lport, const struct in6_addr *faddr, 944 uint16_t fport, int lookupflags, uint8_t numa_domain) 945 { 946 struct inpcb *local_wild, *numa_wild; 947 const struct inpcblbgrouphead *hdr; 948 struct inpcblbgroup *grp; 949 uint32_t idx; 950 951 INP_HASH_LOCK_ASSERT(pcbinfo); 952 953 hdr = &pcbinfo->ipi_lbgrouphashbase[ 954 INP_PCBPORTHASH(lport, pcbinfo->ipi_lbgrouphashmask)]; 955 956 /* 957 * Order of socket selection: 958 * 1. non-wild. 959 * 2. wild (if lookupflags contains INPLOOKUP_WILDCARD). 960 * 961 * NOTE: 962 * - Load balanced group does not contain jailed sockets. 963 * - Load balanced does not contain IPv4 mapped INET6 wild sockets. 964 */ 965 local_wild = NULL; 966 numa_wild = NULL; 967 CK_LIST_FOREACH(grp, hdr, il_list) { 968 #ifdef INET 969 if (!(grp->il_vflag & INP_IPV6)) 970 continue; 971 #endif 972 if (grp->il_lport != lport) 973 continue; 974 975 idx = INP6_PCBLBGROUP_PKTHASH(faddr, lport, fport) % 976 grp->il_inpcnt; 977 if (IN6_ARE_ADDR_EQUAL(&grp->il6_laddr, laddr)) { 978 if (numa_domain == M_NODOM || 979 grp->il_numa_domain == numa_domain) { 980 return (grp->il_inp[idx]); 981 } 982 else 983 numa_wild = grp->il_inp[idx]; 984 } 985 if (IN6_IS_ADDR_UNSPECIFIED(&grp->il6_laddr) && 986 (lookupflags & INPLOOKUP_WILDCARD) != 0 && 987 (local_wild == NULL || numa_domain == M_NODOM || 988 grp->il_numa_domain == numa_domain)) { 989 local_wild = grp->il_inp[idx]; 990 } 991 } 992 if (numa_wild != NULL) 993 return (numa_wild); 994 return (local_wild); 995 } 996 997 /* 998 * Lookup PCB in hash list. Used in in_pcb.c as well as here. 999 */ 1000 struct inpcb * 1001 in6_pcblookup_hash_locked(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, 1002 u_int fport_arg, struct in6_addr *laddr, u_int lport_arg, 1003 int lookupflags, struct ifnet *ifp, uint8_t numa_domain) 1004 { 1005 struct inpcbhead *head; 1006 struct inpcb *inp, *tmpinp; 1007 u_short fport = fport_arg, lport = lport_arg; 1008 1009 KASSERT((lookupflags & ~(INPLOOKUP_WILDCARD)) == 0, 1010 ("%s: invalid lookup flags %d", __func__, lookupflags)); 1011 1012 INP_HASH_LOCK_ASSERT(pcbinfo); 1013 1014 /* 1015 * First look for an exact match. 1016 */ 1017 tmpinp = NULL; 1018 head = &pcbinfo->ipi_hashbase[INP6_PCBHASH(faddr, lport, fport, 1019 pcbinfo->ipi_hashmask)]; 1020 CK_LIST_FOREACH(inp, head, inp_hash) { 1021 /* XXX inp locking */ 1022 if ((inp->inp_vflag & INP_IPV6) == 0) 1023 continue; 1024 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, faddr) && 1025 IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr) && 1026 inp->inp_fport == fport && 1027 inp->inp_lport == lport) { 1028 /* 1029 * XXX We should be able to directly return 1030 * the inp here, without any checks. 1031 * Well unless both bound with SO_REUSEPORT? 1032 */ 1033 if (prison_flag(inp->inp_cred, PR_IP6)) 1034 return (inp); 1035 if (tmpinp == NULL) 1036 tmpinp = inp; 1037 } 1038 } 1039 if (tmpinp != NULL) 1040 return (tmpinp); 1041 1042 /* 1043 * Then look in lb group (for wildcard match). 1044 */ 1045 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) { 1046 inp = in6_pcblookup_lbgroup(pcbinfo, laddr, lport, faddr, 1047 fport, lookupflags, numa_domain); 1048 if (inp != NULL) 1049 return (inp); 1050 } 1051 1052 /* 1053 * Then look for a wildcard match, if requested. 1054 */ 1055 if ((lookupflags & INPLOOKUP_WILDCARD) != 0) { 1056 struct inpcb *local_wild = NULL, *local_exact = NULL; 1057 struct inpcb *jail_wild = NULL; 1058 int injail; 1059 1060 /* 1061 * Order of socket selection - we always prefer jails. 1062 * 1. jailed, non-wild. 1063 * 2. jailed, wild. 1064 * 3. non-jailed, non-wild. 1065 * 4. non-jailed, wild. 1066 */ 1067 head = &pcbinfo->ipi_hashbase[INP_PCBHASH_WILD(lport, 1068 pcbinfo->ipi_hashmask)]; 1069 CK_LIST_FOREACH(inp, head, inp_hash) { 1070 /* XXX inp locking */ 1071 if ((inp->inp_vflag & INP_IPV6) == 0) 1072 continue; 1073 1074 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr) || 1075 inp->inp_lport != lport) { 1076 continue; 1077 } 1078 1079 injail = prison_flag(inp->inp_cred, PR_IP6); 1080 if (injail) { 1081 if (prison_check_ip6_locked( 1082 inp->inp_cred->cr_prison, laddr) != 0) 1083 continue; 1084 } else { 1085 if (local_exact != NULL) 1086 continue; 1087 } 1088 1089 if (IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, laddr)) { 1090 if (injail) 1091 return (inp); 1092 else 1093 local_exact = inp; 1094 } else if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) { 1095 if (injail) 1096 jail_wild = inp; 1097 else 1098 local_wild = inp; 1099 } 1100 } /* LIST_FOREACH */ 1101 1102 if (jail_wild != NULL) 1103 return (jail_wild); 1104 if (local_exact != NULL) 1105 return (local_exact); 1106 if (local_wild != NULL) 1107 return (local_wild); 1108 } /* if ((lookupflags & INPLOOKUP_WILDCARD) != 0) */ 1109 1110 /* 1111 * Not found. 1112 */ 1113 return (NULL); 1114 } 1115 1116 /* 1117 * Lookup PCB in hash list, using pcbinfo tables. This variation locks the 1118 * hash list lock, and will return the inpcb locked (i.e., requires 1119 * INPLOOKUP_LOCKPCB). 1120 */ 1121 static struct inpcb * 1122 in6_pcblookup_hash(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, 1123 u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags, 1124 struct ifnet *ifp, uint8_t numa_domain) 1125 { 1126 struct inpcb *inp; 1127 1128 smr_enter(pcbinfo->ipi_smr); 1129 inp = in6_pcblookup_hash_locked(pcbinfo, faddr, fport, laddr, lport, 1130 lookupflags & INPLOOKUP_WILDCARD, ifp, numa_domain); 1131 if (inp != NULL) { 1132 if (__predict_false(inp_smr_lock(inp, 1133 (lookupflags & INPLOOKUP_LOCKMASK)) == false)) 1134 inp = NULL; 1135 } else 1136 smr_exit(pcbinfo->ipi_smr); 1137 1138 return (inp); 1139 } 1140 1141 /* 1142 * Public inpcb lookup routines, accepting a 4-tuple, and optionally, an mbuf 1143 * from which a pre-calculated hash value may be extracted. 1144 */ 1145 struct inpcb * 1146 in6_pcblookup(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, u_int fport, 1147 struct in6_addr *laddr, u_int lport, int lookupflags, struct ifnet *ifp) 1148 { 1149 1150 KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0, 1151 ("%s: invalid lookup flags %d", __func__, lookupflags)); 1152 KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0, 1153 ("%s: LOCKPCB not set", __func__)); 1154 1155 return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport, 1156 lookupflags, ifp, M_NODOM)); 1157 } 1158 1159 struct inpcb * 1160 in6_pcblookup_mbuf(struct inpcbinfo *pcbinfo, struct in6_addr *faddr, 1161 u_int fport, struct in6_addr *laddr, u_int lport, int lookupflags, 1162 struct ifnet *ifp, struct mbuf *m) 1163 { 1164 1165 KASSERT((lookupflags & ~INPLOOKUP_MASK) == 0, 1166 ("%s: invalid lookup flags %d", __func__, lookupflags)); 1167 KASSERT((lookupflags & (INPLOOKUP_RLOCKPCB | INPLOOKUP_WLOCKPCB)) != 0, 1168 ("%s: LOCKPCB not set", __func__)); 1169 1170 return (in6_pcblookup_hash(pcbinfo, faddr, fport, laddr, lport, 1171 lookupflags, ifp, m->m_pkthdr.numa_domain)); 1172 } 1173 1174 void 1175 init_sin6(struct sockaddr_in6 *sin6, struct mbuf *m, int srcordst) 1176 { 1177 struct ip6_hdr *ip; 1178 1179 ip = mtod(m, struct ip6_hdr *); 1180 bzero(sin6, sizeof(*sin6)); 1181 sin6->sin6_len = sizeof(*sin6); 1182 sin6->sin6_family = AF_INET6; 1183 sin6->sin6_addr = srcordst ? ip->ip6_dst : ip->ip6_src; 1184 1185 (void)sa6_recoverscope(sin6); /* XXX: should catch errors... */ 1186 1187 return; 1188 } 1189