1 /* $FreeBSD: src/sys/netinet6/udp6_usrreq.c,v 1.6.2.13 2003/01/24 05:11:35 sam Exp $ */ 2 /* $DragonFly: src/sys/netinet6/udp6_usrreq.c,v 1.26 2007/04/22 01:13:14 dillon Exp $ */ 3 /* $KAME: udp6_usrreq.c,v 1.27 2001/05/21 05:45:10 jinmei Exp $ */ 4 5 /* 6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the project nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 /* 35 * Copyright (c) 1982, 1986, 1989, 1993 36 * The Regents of the University of California. All rights reserved. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 1. Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * 2. Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in the 45 * documentation and/or other materials provided with the distribution. 46 * 3. All advertising materials mentioning features or use of this software 47 * must display the following acknowledgement: 48 * This product includes software developed by the University of 49 * California, Berkeley and its contributors. 50 * 4. 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 * @(#)udp_var.h 8.1 (Berkeley) 6/10/93 67 */ 68 69 #include "opt_inet.h" 70 #include "opt_inet6.h" 71 #include "opt_ipsec.h" 72 73 #include <sys/param.h> 74 #include <sys/kernel.h> 75 #include <sys/mbuf.h> 76 #include <sys/protosw.h> 77 #include <sys/socket.h> 78 #include <sys/socketvar.h> 79 #include <sys/sysctl.h> 80 #include <sys/errno.h> 81 #include <sys/stat.h> 82 #include <sys/systm.h> 83 #include <sys/syslog.h> 84 #include <sys/proc.h> 85 #include <sys/priv.h> 86 87 #include <sys/thread2.h> 88 #include <sys/socketvar2.h> 89 #include <sys/msgport2.h> 90 91 #include <net/if.h> 92 #include <net/route.h> 93 #include <net/if_types.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; 159 160 IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE); 161 162 ip6 = mtod(m, struct ip6_hdr *); 163 164 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 165 /* XXX send icmp6 host/port unreach? */ 166 m_freem(m); 167 return IPPROTO_DONE; 168 } 169 170 udpstat.udps_ipackets++; 171 172 plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6); 173 uh = (struct udphdr *)((caddr_t)ip6 + off); 174 ulen = ntohs((u_short)uh->uh_ulen); 175 176 if (plen != ulen) { 177 udpstat.udps_badlen++; 178 goto bad; 179 } 180 181 /* 182 * Checksum extended UDP header and data. 183 */ 184 if (uh->uh_sum == 0) 185 udpstat.udps_nosum++; 186 else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) { 187 udpstat.udps_badsum++; 188 goto bad; 189 } 190 191 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 192 struct inpcb *last; 193 194 /* 195 * Deliver a multicast datagram to all sockets 196 * for which the local and remote addresses and ports match 197 * those of the incoming datagram. This allows more than 198 * one process to receive multicasts on the same port. 199 * (This really ought to be done for unicast datagrams as 200 * well, but that would cause problems with existing 201 * applications that open both address-specific sockets and 202 * a wildcard socket listening to the same port -- they would 203 * end up receiving duplicates of every unicast datagram. 204 * Those applications open the multiple sockets to overcome an 205 * inadequacy of the UDP socket interface, but for backwards 206 * compatibility we avoid the problem here rather than 207 * fixing the interface. Maybe 4.5BSD will remedy this?) 208 */ 209 210 /* 211 * In a case that laddr should be set to the link-local 212 * address (this happens in RIPng), the multicast address 213 * specified in the received packet does not match with 214 * laddr. To cure this situation, the matching is relaxed 215 * if the receiving interface is the same as one specified 216 * in the socket and if the destination multicast address 217 * matches one of the multicast groups specified in the socket. 218 */ 219 220 /* 221 * Construct sockaddr format source address. 222 */ 223 init_sin6(&udp_in6, m); /* general init */ 224 udp_in6.sin6_port = uh->uh_sport; 225 /* 226 * KAME note: traditionally we dropped udpiphdr from mbuf here. 227 * We need udphdr for IPsec processing so we do that later. 228 */ 229 230 /* 231 * Locate pcb(s) for datagram. 232 * (Algorithm copied from raw_intr().) 233 */ 234 last = NULL; 235 LIST_FOREACH(in6p, &udbinfo.pcblisthead, inp_list) { 236 if (in6p->inp_flags & INP_PLACEMARKER) 237 continue; 238 if (!(in6p->inp_vflag & INP_IPV6)) 239 continue; 240 if (in6p->in6p_lport != uh->uh_dport) 241 continue; 242 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { 243 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, 244 &ip6->ip6_dst) && 245 !in6_mcmatch(in6p, &ip6->ip6_dst, 246 m->m_pkthdr.rcvif)) 247 continue; 248 } 249 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 250 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, 251 &ip6->ip6_src) || 252 in6p->in6p_fport != uh->uh_sport) 253 continue; 254 } 255 256 if (last != NULL) { 257 struct mbuf *n; 258 259 #ifdef IPSEC 260 /* 261 * Check AH/ESP integrity. 262 */ 263 if (ipsec6_in_reject_so(m, last->inp_socket)) 264 ipsec6stat.in_polvio++; 265 /* do not inject data into pcb */ 266 else 267 #endif /* IPSEC */ 268 #ifdef FAST_IPSEC 269 /* 270 * Check AH/ESP integrity. 271 */ 272 if (ipsec6_in_reject(m, last)) 273 ; 274 else 275 #endif /* FAST_IPSEC */ 276 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { 277 /* 278 * KAME NOTE: do not 279 * m_copy(m, offset, ...) above. 280 * ssb_appendaddr() expects M_PKTHDR, 281 * and m_copy() will copy M_PKTHDR 282 * only if offset is 0. 283 */ 284 if (last->in6p_flags & IN6P_CONTROLOPTS 285 || last->in6p_socket->so_options & SO_TIMESTAMP) 286 ip6_savecontrol(last, &opts, 287 ip6, n); 288 289 m_adj(n, off + sizeof(struct udphdr)); 290 if (ssb_appendaddr(&last->in6p_socket->so_rcv, 291 (struct sockaddr *)&udp_in6, 292 n, opts) == 0) { 293 m_freem(n); 294 if (opts) 295 m_freem(opts); 296 udpstat.udps_fullsock++; 297 } else 298 sorwakeup(last->in6p_socket); 299 opts = NULL; 300 } 301 } 302 last = in6p; 303 /* 304 * Don't look for additional matches if this one does 305 * not have either the SO_REUSEPORT or SO_REUSEADDR 306 * socket options set. This heuristic avoids searching 307 * through all pcbs in the common case of a non-shared 308 * port. It assumes that an application will never 309 * clear these options after setting them. 310 */ 311 if ((last->in6p_socket->so_options & 312 (SO_REUSEPORT | SO_REUSEADDR)) == 0) 313 break; 314 } 315 316 if (last == NULL) { 317 /* 318 * No matching pcb found; discard datagram. 319 * (No need to send an ICMP Port Unreachable 320 * for a broadcast or multicast datgram.) 321 */ 322 udpstat.udps_noport++; 323 udpstat.udps_noportmcast++; 324 goto bad; 325 } 326 #ifdef IPSEC 327 /* 328 * Check AH/ESP integrity. 329 */ 330 if (ipsec6_in_reject_so(m, last->inp_socket)) { 331 ipsec6stat.in_polvio++; 332 goto bad; 333 } 334 #endif /* IPSEC */ 335 #ifdef FAST_IPSEC 336 /* 337 * Check AH/ESP integrity. 338 */ 339 if (ipsec6_in_reject(m, last)) { 340 goto bad; 341 } 342 #endif /* FAST_IPSEC */ 343 if (last->in6p_flags & IN6P_CONTROLOPTS 344 || last->in6p_socket->so_options & SO_TIMESTAMP) 345 ip6_savecontrol(last, &opts, ip6, m); 346 347 m_adj(m, off + sizeof(struct udphdr)); 348 if (ssb_appendaddr(&last->in6p_socket->so_rcv, 349 (struct sockaddr *)&udp_in6, 350 m, opts) == 0) { 351 udpstat.udps_fullsock++; 352 goto bad; 353 } 354 sorwakeup(last->in6p_socket); 355 return IPPROTO_DONE; 356 } 357 /* 358 * Locate pcb for datagram. 359 */ 360 in6p = in6_pcblookup_hash(&udbinfo, &ip6->ip6_src, uh->uh_sport, 361 &ip6->ip6_dst, uh->uh_dport, 1, 362 m->m_pkthdr.rcvif); 363 if (in6p == NULL) { 364 if (log_in_vain) { 365 char buf[INET6_ADDRSTRLEN]; 366 367 strcpy(buf, ip6_sprintf(&ip6->ip6_dst)); 368 log(LOG_INFO, 369 "Connection attempt to UDP [%s]:%d from [%s]:%d\n", 370 buf, ntohs(uh->uh_dport), 371 ip6_sprintf(&ip6->ip6_src), ntohs(uh->uh_sport)); 372 } 373 udpstat.udps_noport++; 374 if (m->m_flags & M_MCAST) { 375 kprintf("UDP6: M_MCAST is set in a unicast packet.\n"); 376 udpstat.udps_noportmcast++; 377 goto bad; 378 } 379 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0); 380 return IPPROTO_DONE; 381 } 382 #ifdef IPSEC 383 /* 384 * Check AH/ESP integrity. 385 */ 386 if (ipsec6_in_reject_so(m, in6p->in6p_socket)) { 387 ipsec6stat.in_polvio++; 388 goto bad; 389 } 390 #endif /* IPSEC */ 391 #ifdef FAST_IPSEC 392 /* 393 * Check AH/ESP integrity. 394 */ 395 if (ipsec6_in_reject(m, in6p)) { 396 goto bad; 397 } 398 #endif /* FAST_IPSEC */ 399 400 /* 401 * Construct sockaddr format source address. 402 * Stuff source address and datagram in user buffer. 403 */ 404 init_sin6(&udp_in6, m); /* general init */ 405 udp_in6.sin6_port = uh->uh_sport; 406 if (in6p->in6p_flags & IN6P_CONTROLOPTS 407 || in6p->in6p_socket->so_options & SO_TIMESTAMP) 408 ip6_savecontrol(in6p, &opts, ip6, m); 409 m_adj(m, off + sizeof(struct udphdr)); 410 if (ssb_appendaddr(&in6p->in6p_socket->so_rcv, 411 (struct sockaddr *)&udp_in6, 412 m, opts) == 0) { 413 udpstat.udps_fullsock++; 414 goto bad; 415 } 416 sorwakeup(in6p->in6p_socket); 417 return IPPROTO_DONE; 418 bad: 419 if (m) 420 m_freem(m); 421 if (opts) 422 m_freem(opts); 423 return IPPROTO_DONE; 424 } 425 426 void 427 udp6_ctlinput(netmsg_t msg) 428 { 429 int cmd = msg->ctlinput.nm_cmd; 430 struct sockaddr *sa = msg->ctlinput.nm_arg; 431 void *d = msg->ctlinput.nm_extra; 432 struct udphdr uh; 433 struct ip6_hdr *ip6; 434 struct mbuf *m; 435 int off = 0; 436 struct ip6ctlparam *ip6cp = NULL; 437 const struct sockaddr_in6 *sa6_src = NULL; 438 void (*notify) (struct inpcb *, int) = udp_notify; 439 struct udp_portonly { 440 u_int16_t uh_sport; 441 u_int16_t uh_dport; 442 } *uhp; 443 444 if (sa->sa_family != AF_INET6 || 445 sa->sa_len != sizeof(struct sockaddr_in6)) 446 goto out; 447 448 if ((unsigned)cmd >= PRC_NCMDS) 449 goto out; 450 if (PRC_IS_REDIRECT(cmd)) 451 notify = in6_rtchange, d = NULL; 452 else if (cmd == PRC_HOSTDEAD) 453 d = NULL; 454 else if (inet6ctlerrmap[cmd] == 0) 455 goto out; 456 457 /* if the parameter is from icmp6, decode it. */ 458 if (d != NULL) { 459 ip6cp = (struct ip6ctlparam *)d; 460 m = ip6cp->ip6c_m; 461 ip6 = ip6cp->ip6c_ip6; 462 off = ip6cp->ip6c_off; 463 sa6_src = ip6cp->ip6c_src; 464 } else { 465 m = NULL; 466 ip6 = NULL; 467 sa6_src = &sa6_any; 468 } 469 470 if (ip6) { 471 /* 472 * XXX: We assume that when IPV6 is non NULL, 473 * M and OFF are valid. 474 */ 475 476 /* check if we can safely examine src and dst ports */ 477 if (m->m_pkthdr.len < off + sizeof(*uhp)) 478 return; 479 480 bzero(&uh, sizeof(uh)); 481 m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh); 482 483 in6_pcbnotify(&udbinfo.pcblisthead, sa, uh.uh_dport, 484 (struct sockaddr *)ip6cp->ip6c_src, uh.uh_sport, 485 cmd, 0, notify); 486 } else { 487 in6_pcbnotify(&udbinfo.pcblisthead, sa, 0, 488 (const struct sockaddr *)sa6_src, 0, 489 cmd, 0, notify); 490 } 491 out: 492 lwkt_replymsg(&msg->ctlinput.base.lmsg, 0); 493 } 494 495 static int 496 udp6_getcred(SYSCTL_HANDLER_ARGS) 497 { 498 struct sockaddr_in6 addrs[2]; 499 struct inpcb *inp; 500 int error; 501 502 error = priv_check(req->td, PRIV_ROOT); 503 if (error) 504 return (error); 505 506 if (req->newlen != sizeof(addrs)) 507 return (EINVAL); 508 if (req->oldlen != sizeof(struct ucred)) 509 return (EINVAL); 510 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 511 if (error) 512 return (error); 513 crit_enter(); 514 inp = in6_pcblookup_hash(&udbinfo, &addrs[1].sin6_addr, 515 addrs[1].sin6_port, 516 &addrs[0].sin6_addr, addrs[0].sin6_port, 517 1, NULL); 518 if (!inp || !inp->inp_socket) { 519 error = ENOENT; 520 goto out; 521 } 522 error = SYSCTL_OUT(req, inp->inp_socket->so_cred, 523 sizeof(struct ucred)); 524 525 out: 526 crit_exit(); 527 return (error); 528 } 529 530 SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW, 531 0, 0, 532 udp6_getcred, "S,ucred", "Get the ucred of a UDP6 connection"); 533 534 /* 535 * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort() 536 * will sofree() it when we return. 537 */ 538 static void 539 udp6_abort(netmsg_t msg) 540 { 541 struct socket *so = msg->abort.base.nm_so; 542 struct inpcb *inp; 543 int error; 544 545 inp = so->so_pcb; 546 if (inp) { 547 soisdisconnected(so); 548 in6_pcbdetach(inp); 549 error = 0; 550 } else { 551 error = EINVAL; 552 } 553 lwkt_replymsg(&msg->abort.base.lmsg, error); 554 } 555 556 static void 557 udp6_attach(netmsg_t msg) 558 { 559 struct socket *so = msg->attach.base.nm_so; 560 struct pru_attach_info *ai = msg->attach.nm_ai; 561 struct inpcb *inp; 562 int error; 563 564 inp = so->so_pcb; 565 if (inp != NULL) { 566 error = EINVAL; 567 goto out; 568 } 569 570 if (so->so_snd.ssb_hiwat == 0 || so->so_rcv.ssb_hiwat == 0) { 571 error = soreserve(so, udp_sendspace, udp_recvspace, 572 ai->sb_rlimit); 573 if (error) 574 goto out; 575 } 576 crit_enter(); 577 error = in_pcballoc(so, &udbinfo); 578 crit_exit(); 579 if (error) 580 goto out; 581 sosetport(so, cpu_portfn(0)); 582 inp = (struct inpcb *)so->so_pcb; 583 inp->inp_vflag |= INP_IPV6; 584 if (!ip6_v6only) 585 inp->inp_vflag |= INP_IPV4; 586 inp->in6p_hops = -1; /* use kernel default */ 587 inp->in6p_cksum = -1; /* just to be sure */ 588 /* 589 * XXX: ugly!! 590 * IPv4 TTL initialization is necessary for an IPv6 socket as well, 591 * because the socket may be bound to an IPv6 wildcard address, 592 * which may match an IPv4-mapped IPv6 address. 593 */ 594 inp->inp_ip_ttl = ip_defttl; 595 error = 0; 596 out: 597 lwkt_replymsg(&msg->attach.base.lmsg, error); 598 } 599 600 static void 601 udp6_bind(netmsg_t msg) 602 { 603 struct socket *so =msg->bind.base.nm_so; 604 struct sockaddr *nam = msg->bind.nm_nam; 605 struct thread *td = msg->bind.nm_td; 606 struct sockaddr_in6 *sin6_p = (struct sockaddr_in6 *)nam; 607 struct inpcb *inp; 608 int error; 609 610 inp = so->so_pcb; 611 if (inp == NULL) { 612 error = EINVAL; 613 goto out; 614 } 615 616 inp->inp_vflag &= ~INP_IPV4; 617 inp->inp_vflag |= INP_IPV6; 618 if (!(inp->inp_flags & IN6P_IPV6_V6ONLY)) { 619 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) 620 inp->inp_vflag |= INP_IPV4; 621 else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 622 struct sockaddr_in sin; 623 624 in6_sin6_2_sin(&sin, sin6_p); 625 inp->inp_vflag |= INP_IPV4; 626 inp->inp_vflag &= ~INP_IPV6; 627 crit_enter(); 628 error = in_pcbbind(inp, (struct sockaddr *)&sin, td); 629 crit_exit(); 630 goto out; 631 } 632 } 633 634 crit_enter(); 635 error = in6_pcbbind(inp, nam, td); 636 crit_exit(); 637 if (error == 0) { 638 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) 639 inp->inp_flags |= INP_WASBOUND_NOTANY; 640 in_pcbinswildcardhash(inp); 641 } 642 out: 643 lwkt_replymsg(&msg->bind.base.lmsg, error); 644 } 645 646 static void 647 udp6_connect(netmsg_t msg) 648 { 649 struct socket *so = msg->connect.base.nm_so; 650 struct sockaddr *nam = msg->connect.nm_nam; 651 struct thread *td = msg->connect.nm_td; 652 struct inpcb *inp; 653 int error; 654 655 inp = so->so_pcb; 656 if (inp == NULL) { 657 error = EINVAL; 658 goto out; 659 } 660 661 if (!(inp->inp_flags & IN6P_IPV6_V6ONLY)) { 662 struct sockaddr_in6 *sin6_p; 663 664 sin6_p = (struct sockaddr_in6 *)nam; 665 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 666 struct sockaddr_in sin; 667 668 if (inp->inp_faddr.s_addr != INADDR_ANY) { 669 error = EISCONN; 670 goto out; 671 } 672 in6_sin6_2_sin(&sin, sin6_p); 673 crit_enter(); 674 error = in_pcbconnect(inp, (struct sockaddr *)&sin, td); 675 crit_exit(); 676 if (error == 0) { 677 inp->inp_vflag |= INP_IPV4; 678 inp->inp_vflag &= ~INP_IPV6; 679 soisconnected(so); 680 } 681 goto out; 682 } 683 } 684 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 685 error = EISCONN; 686 goto out; 687 } 688 if (inp->inp_flags & INP_WILDCARD) 689 in_pcbremwildcardhash(inp); 690 if (!prison_remote_ip(td, nam)) { 691 error = EAFNOSUPPORT; /* IPv4 only jail */ 692 goto out; 693 } 694 crit_enter(); 695 error = in6_pcbconnect(inp, nam, td); 696 crit_exit(); 697 if (error == 0) { 698 if (!ip6_v6only) { /* should be non mapped addr */ 699 inp->inp_vflag &= ~INP_IPV4; 700 inp->inp_vflag |= INP_IPV6; 701 } 702 soisconnected(so); 703 } else if (error == EAFNOSUPPORT) { /* connection dissolved */ 704 /* 705 * Follow traditional BSD behavior and retain 706 * the local port binding. But, fix the old misbehavior 707 * of overwriting any previously bound local address. 708 */ 709 if (!(inp->inp_flags & INP_WASBOUND_NOTANY)) 710 inp->in6p_laddr = kin6addr_any; 711 in_pcbinswildcardhash(inp); 712 } 713 out: 714 lwkt_replymsg(&msg->connect.base.lmsg, error); 715 } 716 717 static void 718 udp6_detach(netmsg_t msg) 719 { 720 struct socket *so = msg->detach.base.nm_so; 721 struct inpcb *inp; 722 int error; 723 724 inp = so->so_pcb; 725 if (inp) { 726 crit_enter(); 727 in6_pcbdetach(inp); 728 crit_exit(); 729 error = 0; 730 } else { 731 error = EINVAL; 732 } 733 lwkt_replymsg(&msg->detach.base.lmsg, error); 734 } 735 736 static void 737 udp6_disconnect(netmsg_t msg) 738 { 739 struct socket *so = msg->disconnect.base.nm_so; 740 struct inpcb *inp; 741 int error; 742 743 inp = so->so_pcb; 744 if (inp == NULL) { 745 error = EINVAL; 746 goto out; 747 } 748 749 if (inp->inp_vflag & INP_IPV4) { 750 const struct pr_usrreqs *pru; 751 752 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs; 753 pru->pru_disconnect(msg); /* XXX on right port? */ 754 return; 755 } 756 757 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 758 error = ENOTCONN; 759 } else { 760 crit_enter(); 761 in6_pcbdisconnect(inp); 762 crit_exit(); 763 soclrstate(so, SS_ISCONNECTED); /* XXX */ 764 error = 0; 765 } 766 out: 767 lwkt_replymsg(&msg->disconnect.base.lmsg, error); 768 } 769 770 static void 771 udp6_send(netmsg_t msg) 772 { 773 struct socket *so = msg->send.base.nm_so; 774 struct mbuf *m = msg->send.nm_m; 775 struct sockaddr *addr = msg->send.nm_addr; 776 struct mbuf *control = msg->send.nm_control; 777 struct thread *td = msg->send.nm_td; 778 struct inpcb *inp; 779 int error = 0; 780 781 inp = so->so_pcb; 782 if (inp == NULL) { 783 error = EINVAL; 784 goto bad; 785 } 786 787 if (addr) { 788 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 789 error = EINVAL; 790 goto bad; 791 } 792 if (addr->sa_family != AF_INET6) { 793 error = EAFNOSUPPORT; 794 goto bad; 795 } 796 } 797 798 if (!ip6_v6only) { 799 int hasv4addr; 800 struct sockaddr_in6 *sin6 = 0; 801 802 if (addr == NULL) 803 hasv4addr = (inp->inp_vflag & INP_IPV4); 804 else { 805 sin6 = (struct sockaddr_in6 *)addr; 806 hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) 807 ? 1 : 0; 808 } 809 if (hasv4addr) { 810 const struct pr_usrreqs *pru; 811 812 if (sin6) 813 in6_sin6_2_sin_in_sock(addr); 814 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs; 815 pru->pru_send(msg); 816 /* msg invalid now */ 817 return; 818 } 819 } 820 821 error = udp6_output(inp, m, addr, control, td); 822 bad: 823 m_freem(m); 824 lwkt_replymsg(&msg->send.base.lmsg, error); 825 } 826 827 struct pr_usrreqs udp6_usrreqs = { 828 .pru_abort = udp6_abort, 829 .pru_accept = pr_generic_notsupp, 830 .pru_attach = udp6_attach, 831 .pru_bind = udp6_bind, 832 .pru_connect = udp6_connect, 833 .pru_connect2 = pr_generic_notsupp, 834 .pru_control = in6_control_dispatch, 835 .pru_detach = udp6_detach, 836 .pru_disconnect = udp6_disconnect, 837 .pru_listen = pr_generic_notsupp, 838 .pru_peeraddr = in6_mapped_peeraddr_dispatch, 839 .pru_rcvd = pr_generic_notsupp, 840 .pru_rcvoob = pr_generic_notsupp, 841 .pru_send = udp6_send, 842 .pru_sense = pru_sense_null, 843 .pru_shutdown = udp_shutdown, 844 .pru_sockaddr = in6_mapped_sockaddr_dispatch, 845 .pru_sosend = sosend, 846 .pru_soreceive = soreceive 847 }; 848 849