1 /* $FreeBSD: src/sys/netinet6/udp6_usrreq.c,v 1.6.2.13 2003/01/24 05:11:35 sam Exp $ */ 2 /* $KAME: udp6_usrreq.c,v 1.27 2001/05/21 05:45:10 jinmei Exp $ */ 3 4 /* 5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the project nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 /* 34 * Copyright (c) 1982, 1986, 1989, 1993 35 * The Regents of the University of California. All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. All advertising materials mentioning features or use of this software 46 * must display the following acknowledgement: 47 * This product includes software developed by the University of 48 * California, Berkeley and its contributors. 49 * 4. Neither the name of the University nor the names of its contributors 50 * may be used to endorse or promote products derived from this software 51 * without specific prior written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 63 * SUCH DAMAGE. 64 * 65 * @(#)udp_var.h 8.1 (Berkeley) 6/10/93 66 */ 67 68 #include "opt_inet.h" 69 #include "opt_inet6.h" 70 #include "opt_ipsec.h" 71 72 #include <sys/param.h> 73 #include <sys/kernel.h> 74 #include <sys/mbuf.h> 75 #include <sys/protosw.h> 76 #include <sys/socket.h> 77 #include <sys/socketvar.h> 78 #include <sys/sysctl.h> 79 #include <sys/errno.h> 80 #include <sys/stat.h> 81 #include <sys/systm.h> 82 #include <sys/syslog.h> 83 #include <sys/proc.h> 84 #include <sys/priv.h> 85 86 #include <sys/thread2.h> 87 #include <sys/socketvar2.h> 88 #include <sys/msgport2.h> 89 90 #include <net/if.h> 91 #include <net/route.h> 92 #include <net/if_types.h> 93 #include <net/netisr2.h> 94 95 #include <netinet/in.h> 96 #include <netinet/in_systm.h> 97 #include <netinet/ip.h> 98 #include <netinet/in_pcb.h> 99 #include <netinet/in_var.h> 100 #include <netinet/ip_var.h> 101 #include <netinet/udp.h> 102 #include <netinet/udp_var.h> 103 #include <netinet/ip6.h> 104 #include <netinet6/ip6_var.h> 105 #include <netinet6/in6_pcb.h> 106 #include <netinet/icmp6.h> 107 #include <netinet6/udp6_var.h> 108 #include <netinet6/ip6protosw.h> 109 110 #ifdef IPSEC 111 #include <netinet6/ipsec.h> 112 #include <netinet6/ipsec6.h> 113 #endif /* IPSEC */ 114 115 #ifdef FAST_IPSEC 116 #include <netproto/ipsec/ipsec.h> 117 #include <netproto/ipsec/ipsec6.h> 118 #endif /* FAST_IPSEC */ 119 120 /* 121 * UDP protocol inplementation. 122 * Per RFC 768, August, 1980. 123 */ 124 125 extern struct protosw inetsw[]; 126 static int in6_mcmatch (struct inpcb *, struct in6_addr *, struct ifnet *); 127 128 static int 129 in6_mcmatch(struct inpcb *in6p, struct in6_addr *ia6, struct ifnet *ifp) 130 { 131 struct ip6_moptions *im6o = in6p->in6p_moptions; 132 struct in6_multi_mship *imm; 133 134 if (im6o == NULL) 135 return 0; 136 137 for (imm = im6o->im6o_memberships.lh_first; imm != NULL; 138 imm = imm->i6mm_chain.le_next) { 139 if ((ifp == NULL || 140 imm->i6mm_maddr->in6m_ifp == ifp) && 141 IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr, 142 ia6)) 143 return 1; 144 } 145 return 0; 146 } 147 148 int 149 udp6_input(struct mbuf **mp, int *offp, int proto) 150 { 151 struct mbuf *m = *mp; 152 struct ip6_hdr *ip6; 153 struct udphdr *uh; 154 struct inpcb *in6p; 155 struct mbuf *opts = NULL; 156 int off = *offp; 157 int plen, ulen; 158 struct sockaddr_in6 udp_in6; 159 struct socket *so; 160 161 IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE); 162 163 ip6 = mtod(m, struct ip6_hdr *); 164 165 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 166 /* XXX send icmp6 host/port unreach? */ 167 m_freem(m); 168 return IPPROTO_DONE; 169 } 170 171 udp_stat.udps_ipackets++; 172 173 plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6); 174 uh = (struct udphdr *)((caddr_t)ip6 + off); 175 ulen = ntohs((u_short)uh->uh_ulen); 176 177 if (plen != ulen) { 178 udp_stat.udps_badlen++; 179 goto bad; 180 } 181 182 /* 183 * Checksum extended UDP header and data. 184 */ 185 if (uh->uh_sum == 0) 186 udp_stat.udps_nosum++; 187 else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) { 188 udp_stat.udps_badsum++; 189 goto bad; 190 } 191 192 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 193 struct inpcb *last; 194 195 /* 196 * Deliver a multicast datagram to all sockets 197 * for which the local and remote addresses and ports match 198 * those of the incoming datagram. This allows more than 199 * one process to receive multicasts on the same port. 200 * (This really ought to be done for unicast datagrams as 201 * well, but that would cause problems with existing 202 * applications that open both address-specific sockets and 203 * a wildcard socket listening to the same port -- they would 204 * end up receiving duplicates of every unicast datagram. 205 * Those applications open the multiple sockets to overcome an 206 * inadequacy of the UDP socket interface, but for backwards 207 * compatibility we avoid the problem here rather than 208 * fixing the interface. Maybe 4.5BSD will remedy this?) 209 */ 210 211 /* 212 * In a case that laddr should be set to the link-local 213 * address (this happens in RIPng), the multicast address 214 * specified in the received packet does not match with 215 * laddr. To cure this situation, the matching is relaxed 216 * if the receiving interface is the same as one specified 217 * in the socket and if the destination multicast address 218 * matches one of the multicast groups specified in the socket. 219 */ 220 221 /* 222 * Construct sockaddr format source address. 223 */ 224 init_sin6(&udp_in6, m); /* general init */ 225 udp_in6.sin6_port = uh->uh_sport; 226 /* 227 * KAME note: traditionally we dropped udpiphdr from mbuf here. 228 * We need udphdr for IPsec processing so we do that later. 229 */ 230 231 /* 232 * Locate pcb(s) for datagram. 233 * (Algorithm copied from raw_intr().) 234 */ 235 last = NULL; 236 LIST_FOREACH(in6p, &udbinfo.pcblisthead, inp_list) { 237 KKASSERT((in6p->inp_flags & INP_PLACEMARKER) == 0); 238 239 if (!(in6p->inp_vflag & INP_IPV6)) 240 continue; 241 if (in6p->in6p_lport != uh->uh_dport) 242 continue; 243 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { 244 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, 245 &ip6->ip6_dst) && 246 !in6_mcmatch(in6p, &ip6->ip6_dst, 247 m->m_pkthdr.rcvif)) 248 continue; 249 } 250 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 251 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, 252 &ip6->ip6_src) || 253 in6p->in6p_fport != uh->uh_sport) 254 continue; 255 } 256 257 if (last != NULL) { 258 struct mbuf *n; 259 260 #ifdef IPSEC 261 /* 262 * Check AH/ESP integrity. 263 */ 264 if (ipsec6_in_reject_so(m, last->inp_socket)) 265 ipsec6stat.in_polvio++; 266 /* do not inject data into pcb */ 267 else 268 #endif /* IPSEC */ 269 #ifdef FAST_IPSEC 270 /* 271 * Check AH/ESP integrity. 272 */ 273 if (ipsec6_in_reject(m, last)) 274 ; 275 else 276 #endif /* FAST_IPSEC */ 277 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { 278 /* 279 * KAME NOTE: do not 280 * m_copy(m, offset, ...) above. 281 * ssb_appendaddr() expects M_PKTHDR, 282 * and m_copy() will copy M_PKTHDR 283 * only if offset is 0. 284 */ 285 so = last->in6p_socket; 286 if ((last->in6p_flags & IN6P_CONTROLOPTS) || 287 (so->so_options & SO_TIMESTAMP)) { 288 ip6_savecontrol(last, &opts, 289 ip6, n); 290 } 291 m_adj(n, off + sizeof(struct udphdr)); 292 lwkt_gettoken(&so->so_rcv.ssb_token); 293 if (ssb_appendaddr(&so->so_rcv, 294 (struct sockaddr *)&udp_in6, 295 n, opts) == 0) { 296 m_freem(n); 297 if (opts) 298 m_freem(opts); 299 udp_stat.udps_fullsock++; 300 } else { 301 sorwakeup(so); 302 } 303 lwkt_reltoken(&so->so_rcv.ssb_token); 304 opts = NULL; 305 } 306 } 307 last = in6p; 308 /* 309 * Don't look for additional matches if this one does 310 * not have either the SO_REUSEPORT or SO_REUSEADDR 311 * socket options set. This heuristic avoids searching 312 * through all pcbs in the common case of a non-shared 313 * port. It assumes that an application will never 314 * clear these options after setting them. 315 */ 316 if ((last->in6p_socket->so_options & 317 (SO_REUSEPORT | SO_REUSEADDR)) == 0) 318 break; 319 } 320 321 if (last == NULL) { 322 /* 323 * No matching pcb found; discard datagram. 324 * (No need to send an ICMP Port Unreachable 325 * for a broadcast or multicast datgram.) 326 */ 327 udp_stat.udps_noport++; 328 udp_stat.udps_noportmcast++; 329 goto bad; 330 } 331 #ifdef IPSEC 332 /* 333 * Check AH/ESP integrity. 334 */ 335 if (ipsec6_in_reject_so(m, last->inp_socket)) { 336 ipsec6stat.in_polvio++; 337 goto bad; 338 } 339 #endif /* IPSEC */ 340 #ifdef FAST_IPSEC 341 /* 342 * Check AH/ESP integrity. 343 */ 344 if (ipsec6_in_reject(m, last)) { 345 goto bad; 346 } 347 #endif /* FAST_IPSEC */ 348 if (last->in6p_flags & IN6P_CONTROLOPTS 349 || last->in6p_socket->so_options & SO_TIMESTAMP) 350 ip6_savecontrol(last, &opts, ip6, m); 351 352 m_adj(m, off + sizeof(struct udphdr)); 353 so = last->in6p_socket; 354 lwkt_gettoken(&so->so_rcv.ssb_token); 355 if (ssb_appendaddr(&so->so_rcv, (struct sockaddr *)&udp_in6, 356 m, opts) == 0) { 357 udp_stat.udps_fullsock++; 358 lwkt_reltoken(&so->so_rcv.ssb_token); 359 goto bad; 360 } 361 sorwakeup(so); 362 lwkt_reltoken(&so->so_rcv.ssb_token); 363 return IPPROTO_DONE; 364 } 365 /* 366 * Locate pcb for datagram. 367 */ 368 in6p = in6_pcblookup_hash(&udbinfo, &ip6->ip6_src, uh->uh_sport, 369 &ip6->ip6_dst, uh->uh_dport, 1, 370 m->m_pkthdr.rcvif); 371 if (in6p == NULL) { 372 if (log_in_vain) { 373 char buf[INET6_ADDRSTRLEN]; 374 375 strcpy(buf, ip6_sprintf(&ip6->ip6_dst)); 376 log(LOG_INFO, 377 "Connection attempt to UDP [%s]:%d from [%s]:%d\n", 378 buf, ntohs(uh->uh_dport), 379 ip6_sprintf(&ip6->ip6_src), ntohs(uh->uh_sport)); 380 } 381 udp_stat.udps_noport++; 382 if (m->m_flags & M_MCAST) { 383 kprintf("UDP6: M_MCAST is set in a unicast packet.\n"); 384 udp_stat.udps_noportmcast++; 385 goto bad; 386 } 387 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0); 388 return IPPROTO_DONE; 389 } 390 #ifdef IPSEC 391 /* 392 * Check AH/ESP integrity. 393 */ 394 if (ipsec6_in_reject_so(m, in6p->in6p_socket)) { 395 ipsec6stat.in_polvio++; 396 goto bad; 397 } 398 #endif /* IPSEC */ 399 #ifdef FAST_IPSEC 400 /* 401 * Check AH/ESP integrity. 402 */ 403 if (ipsec6_in_reject(m, in6p)) { 404 goto bad; 405 } 406 #endif /* FAST_IPSEC */ 407 408 /* 409 * Construct sockaddr format source address. 410 * Stuff source address and datagram in user buffer. 411 */ 412 init_sin6(&udp_in6, m); /* general init */ 413 udp_in6.sin6_port = uh->uh_sport; 414 if (in6p->in6p_flags & IN6P_CONTROLOPTS 415 || in6p->in6p_socket->so_options & SO_TIMESTAMP) 416 ip6_savecontrol(in6p, &opts, ip6, m); 417 m_adj(m, off + sizeof(struct udphdr)); 418 so = in6p->in6p_socket; 419 lwkt_gettoken(&so->so_rcv.ssb_token); 420 if (ssb_appendaddr(&so->so_rcv, (struct sockaddr *)&udp_in6, 421 m, opts) == 0) { 422 udp_stat.udps_fullsock++; 423 lwkt_reltoken(&so->so_rcv.ssb_token); 424 goto bad; 425 } 426 sorwakeup(so); 427 lwkt_reltoken(&so->so_rcv.ssb_token); 428 return IPPROTO_DONE; 429 bad: 430 if (m) 431 m_freem(m); 432 if (opts) 433 m_freem(opts); 434 return IPPROTO_DONE; 435 } 436 437 void 438 udp6_ctlinput(netmsg_t msg) 439 { 440 int cmd = msg->ctlinput.nm_cmd; 441 struct sockaddr *sa = msg->ctlinput.nm_arg; 442 void *d = msg->ctlinput.nm_extra; 443 struct udphdr uh; 444 struct ip6_hdr *ip6; 445 struct mbuf *m; 446 int off = 0; 447 struct ip6ctlparam *ip6cp = NULL; 448 const struct sockaddr_in6 *sa6_src = NULL; 449 void (*notify) (struct inpcb *, int) = udp_notify; 450 struct udp_portonly { 451 u_int16_t uh_sport; 452 u_int16_t uh_dport; 453 } *uhp; 454 455 if (sa->sa_family != AF_INET6 || 456 sa->sa_len != sizeof(struct sockaddr_in6)) 457 goto out; 458 459 if ((unsigned)cmd >= PRC_NCMDS) 460 goto out; 461 if (PRC_IS_REDIRECT(cmd)) 462 notify = in6_rtchange, d = NULL; 463 else if (cmd == PRC_HOSTDEAD) 464 d = NULL; 465 else if (inet6ctlerrmap[cmd] == 0) 466 goto out; 467 468 /* if the parameter is from icmp6, decode it. */ 469 if (d != NULL) { 470 ip6cp = (struct ip6ctlparam *)d; 471 m = ip6cp->ip6c_m; 472 ip6 = ip6cp->ip6c_ip6; 473 off = ip6cp->ip6c_off; 474 sa6_src = ip6cp->ip6c_src; 475 } else { 476 m = NULL; 477 ip6 = NULL; 478 sa6_src = &sa6_any; 479 } 480 481 if (ip6) { 482 /* 483 * XXX: We assume that when IPV6 is non NULL, 484 * M and OFF are valid. 485 */ 486 487 /* check if we can safely examine src and dst ports */ 488 if (m->m_pkthdr.len < off + sizeof(*uhp)) 489 return; 490 491 bzero(&uh, sizeof(uh)); 492 m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh); 493 494 in6_pcbnotify(&udbinfo.pcblisthead, sa, uh.uh_dport, 495 (struct sockaddr *)ip6cp->ip6c_src, uh.uh_sport, 496 cmd, 0, notify); 497 } else { 498 in6_pcbnotify(&udbinfo.pcblisthead, sa, 0, 499 (const struct sockaddr *)sa6_src, 0, 500 cmd, 0, notify); 501 } 502 out: 503 lwkt_replymsg(&msg->ctlinput.base.lmsg, 0); 504 } 505 506 static int 507 udp6_getcred(SYSCTL_HANDLER_ARGS) 508 { 509 struct sockaddr_in6 addrs[2]; 510 struct inpcb *inp; 511 int error; 512 513 error = priv_check(req->td, PRIV_ROOT); 514 if (error) 515 return (error); 516 517 if (req->newlen != sizeof(addrs)) 518 return (EINVAL); 519 if (req->oldlen != sizeof(struct ucred)) 520 return (EINVAL); 521 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 522 if (error) 523 return (error); 524 crit_enter(); 525 inp = in6_pcblookup_hash(&udbinfo, &addrs[1].sin6_addr, 526 addrs[1].sin6_port, 527 &addrs[0].sin6_addr, addrs[0].sin6_port, 528 1, NULL); 529 if (!inp || !inp->inp_socket) { 530 error = ENOENT; 531 goto out; 532 } 533 error = SYSCTL_OUT(req, inp->inp_socket->so_cred, 534 sizeof(struct ucred)); 535 536 out: 537 crit_exit(); 538 return (error); 539 } 540 541 SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW, 542 0, 0, 543 udp6_getcred, "S,ucred", "Get the ucred of a UDP6 connection"); 544 545 /* 546 * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort() 547 * will sofree() it when we return. 548 */ 549 static void 550 udp6_abort(netmsg_t msg) 551 { 552 struct socket *so = msg->abort.base.nm_so; 553 struct inpcb *inp; 554 int error; 555 556 inp = so->so_pcb; 557 if (inp) { 558 soisdisconnected(so); 559 560 udbinfo_barrier_set(); 561 in6_pcbdetach(inp); 562 udbinfo_barrier_rem(); 563 error = 0; 564 } else { 565 error = EINVAL; 566 } 567 lwkt_replymsg(&msg->abort.base.lmsg, error); 568 } 569 570 static void 571 udp6_attach(netmsg_t msg) 572 { 573 struct socket *so = msg->attach.base.nm_so; 574 struct pru_attach_info *ai = msg->attach.nm_ai; 575 struct inpcb *inp; 576 int error; 577 578 inp = so->so_pcb; 579 if (inp != NULL) { 580 error = EINVAL; 581 goto out; 582 } 583 584 if (so->so_snd.ssb_hiwat == 0 || so->so_rcv.ssb_hiwat == 0) { 585 error = soreserve(so, udp_sendspace, udp_recvspace, 586 ai->sb_rlimit); 587 if (error) 588 goto out; 589 } 590 591 udbinfo_barrier_set(); 592 error = in_pcballoc(so, &udbinfo); 593 udbinfo_barrier_rem(); 594 595 if (error) 596 goto out; 597 598 sosetport(so, netisr_cpuport(0)); 599 inp = (struct inpcb *)so->so_pcb; 600 inp->inp_vflag |= INP_IPV6; 601 if (!ip6_v6only) 602 inp->inp_vflag |= INP_IPV4; 603 inp->in6p_hops = -1; /* use kernel default */ 604 inp->in6p_cksum = -1; /* just to be sure */ 605 /* 606 * XXX: ugly!! 607 * IPv4 TTL initialization is necessary for an IPv6 socket as well, 608 * because the socket may be bound to an IPv6 wildcard address, 609 * which may match an IPv4-mapped IPv6 address. 610 */ 611 inp->inp_ip_ttl = ip_defttl; 612 error = 0; 613 out: 614 lwkt_replymsg(&msg->attach.base.lmsg, error); 615 } 616 617 static void 618 udp6_bind(netmsg_t msg) 619 { 620 struct socket *so =msg->bind.base.nm_so; 621 struct sockaddr *nam = msg->bind.nm_nam; 622 struct thread *td = msg->bind.nm_td; 623 struct sockaddr_in6 *sin6_p = (struct sockaddr_in6 *)nam; 624 struct inpcb *inp; 625 int error; 626 627 inp = so->so_pcb; 628 if (inp == NULL) { 629 error = EINVAL; 630 goto out; 631 } 632 633 inp->inp_vflag &= ~INP_IPV4; 634 inp->inp_vflag |= INP_IPV6; 635 if (!(inp->inp_flags & IN6P_IPV6_V6ONLY)) { 636 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) 637 inp->inp_vflag |= INP_IPV4; 638 else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 639 struct sockaddr_in sin; 640 641 in6_sin6_2_sin(&sin, sin6_p); 642 inp->inp_vflag |= INP_IPV4; 643 inp->inp_vflag &= ~INP_IPV6; 644 crit_enter(); 645 error = in_pcbbind(inp, (struct sockaddr *)&sin, td); 646 crit_exit(); 647 goto out; 648 } 649 } 650 651 crit_enter(); 652 error = in6_pcbbind(inp, nam, td); 653 crit_exit(); 654 if (error == 0) { 655 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) 656 inp->inp_flags |= INP_WASBOUND_NOTANY; 657 658 udbinfo_barrier_set(); 659 in_pcbinswildcardhash(inp); 660 udbinfo_barrier_rem(); 661 } 662 out: 663 lwkt_replymsg(&msg->bind.base.lmsg, error); 664 } 665 666 static void 667 udp6_connect(netmsg_t msg) 668 { 669 struct socket *so = msg->connect.base.nm_so; 670 struct sockaddr *nam = msg->connect.nm_nam; 671 struct thread *td = msg->connect.nm_td; 672 struct inpcb *inp; 673 int error; 674 675 udbinfo_barrier_set(); 676 677 inp = so->so_pcb; 678 if (inp == NULL) { 679 error = EINVAL; 680 goto out; 681 } 682 683 if (!(inp->inp_flags & IN6P_IPV6_V6ONLY)) { 684 struct sockaddr_in6 *sin6_p; 685 686 sin6_p = (struct sockaddr_in6 *)nam; 687 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 688 struct sockaddr_in sin; 689 690 if (inp->inp_faddr.s_addr != INADDR_ANY) { 691 error = EISCONN; 692 goto out; 693 } 694 in6_sin6_2_sin(&sin, sin6_p); 695 crit_enter(); 696 if (inp->inp_flags & INP_WILDCARD) 697 in_pcbremwildcardhash(inp); 698 error = in_pcbconnect(inp, (struct sockaddr *)&sin, td); 699 crit_exit(); 700 if (error == 0) { 701 inp->inp_vflag |= INP_IPV4; 702 inp->inp_vflag &= ~INP_IPV6; 703 soisconnected(so); 704 } 705 goto out; 706 } 707 } 708 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 709 error = EISCONN; 710 goto out; 711 } 712 if (inp->inp_flags & INP_WILDCARD) 713 in_pcbremwildcardhash(inp); 714 if (!prison_remote_ip(td, nam)) { 715 error = EAFNOSUPPORT; /* IPv4 only jail */ 716 goto out; 717 } 718 crit_enter(); 719 error = in6_pcbconnect(inp, nam, td); 720 crit_exit(); 721 if (error == 0) { 722 if (!ip6_v6only) { /* should be non mapped addr */ 723 inp->inp_vflag &= ~INP_IPV4; 724 inp->inp_vflag |= INP_IPV6; 725 } 726 soisconnected(so); 727 } else if (error == EAFNOSUPPORT) { /* connection dissolved */ 728 /* 729 * Follow traditional BSD behavior and retain 730 * the local port binding. But, fix the old misbehavior 731 * of overwriting any previously bound local address. 732 */ 733 if (!(inp->inp_flags & INP_WASBOUND_NOTANY)) 734 inp->in6p_laddr = kin6addr_any; 735 in_pcbinswildcardhash(inp); 736 } 737 out: 738 udbinfo_barrier_rem(); 739 lwkt_replymsg(&msg->connect.base.lmsg, error); 740 } 741 742 static void 743 udp6_detach(netmsg_t msg) 744 { 745 struct socket *so = msg->detach.base.nm_so; 746 struct inpcb *inp; 747 int error; 748 749 inp = so->so_pcb; 750 if (inp) { 751 udbinfo_barrier_set(); 752 in6_pcbdetach(inp); 753 udbinfo_barrier_rem(); 754 error = 0; 755 } else { 756 error = EINVAL; 757 } 758 lwkt_replymsg(&msg->detach.base.lmsg, error); 759 } 760 761 static void 762 udp6_disconnect(netmsg_t msg) 763 { 764 struct socket *so = msg->disconnect.base.nm_so; 765 struct inpcb *inp; 766 int error; 767 768 inp = so->so_pcb; 769 if (inp == NULL) { 770 error = EINVAL; 771 goto out; 772 } 773 774 if (inp->inp_vflag & INP_IPV4) { 775 const struct pr_usrreqs *pru; 776 777 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs; 778 pru->pru_disconnect(msg); /* XXX on right port? */ 779 return; 780 } 781 782 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 783 error = ENOTCONN; 784 } else { 785 udbinfo_barrier_set(); 786 in6_pcbdisconnect(inp); 787 udbinfo_barrier_rem(); 788 soclrstate(so, SS_ISCONNECTED); /* XXX */ 789 error = 0; 790 } 791 out: 792 lwkt_replymsg(&msg->disconnect.base.lmsg, error); 793 } 794 795 static void 796 udp6_send(netmsg_t msg) 797 { 798 struct socket *so = msg->send.base.nm_so; 799 struct mbuf *m = msg->send.nm_m; 800 struct sockaddr *addr = msg->send.nm_addr; 801 struct mbuf *control = msg->send.nm_control; 802 struct thread *td = msg->send.nm_td; 803 struct inpcb *inp; 804 int error = 0; 805 806 inp = so->so_pcb; 807 if (inp == NULL) { 808 error = EINVAL; 809 goto bad; 810 } 811 812 if (addr) { 813 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 814 error = EINVAL; 815 goto bad; 816 } 817 if (addr->sa_family != AF_INET6) { 818 error = EAFNOSUPPORT; 819 goto bad; 820 } 821 } 822 823 if (!ip6_v6only) { 824 int hasv4addr; 825 struct sockaddr_in6 *sin6 = NULL; 826 827 if (addr == NULL) 828 hasv4addr = (inp->inp_vflag & INP_IPV4); 829 else { 830 sin6 = (struct sockaddr_in6 *)addr; 831 hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) 832 ? 1 : 0; 833 } 834 if (hasv4addr) { 835 const struct pr_usrreqs *pru; 836 837 if (sin6) 838 in6_sin6_2_sin_in_sock(addr); 839 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs; 840 pru->pru_send(msg); 841 /* msg invalid now */ 842 return; 843 } 844 } 845 846 error = udp6_output(inp, m, addr, control, td); 847 lwkt_replymsg(&msg->send.base.lmsg, error); 848 return; 849 bad: 850 m_freem(m); 851 lwkt_replymsg(&msg->send.base.lmsg, error); 852 } 853 854 struct pr_usrreqs udp6_usrreqs = { 855 .pru_abort = udp6_abort, 856 .pru_accept = pr_generic_notsupp, 857 .pru_attach = udp6_attach, 858 .pru_bind = udp6_bind, 859 .pru_connect = udp6_connect, 860 .pru_connect2 = pr_generic_notsupp, 861 .pru_control = in6_control_dispatch, 862 .pru_detach = udp6_detach, 863 .pru_disconnect = udp6_disconnect, 864 .pru_listen = pr_generic_notsupp, 865 .pru_peeraddr = in6_mapped_peeraddr_dispatch, 866 .pru_rcvd = pr_generic_notsupp, 867 .pru_rcvoob = pr_generic_notsupp, 868 .pru_send = udp6_send, 869 .pru_sense = pru_sense_null, 870 .pru_shutdown = udp_shutdown, 871 .pru_sockaddr = in6_mapped_sockaddr_dispatch, 872 .pru_sosend = sosend, 873 .pru_soreceive = soreceive 874 }; 875 876