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. Neither the name of the University nor the names of its contributors 46 * may be used to endorse or promote products derived from this software 47 * without specific prior written permission. 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 59 * SUCH DAMAGE. 60 * 61 * @(#)udp_var.h 8.1 (Berkeley) 6/10/93 62 */ 63 64 #include "opt_inet.h" 65 #include "opt_inet6.h" 66 #include "opt_ipsec.h" 67 68 #include <sys/param.h> 69 #include <sys/kernel.h> 70 #include <sys/mbuf.h> 71 #include <sys/protosw.h> 72 #include <sys/socket.h> 73 #include <sys/socketvar.h> 74 #include <sys/sysctl.h> 75 #include <sys/errno.h> 76 #include <sys/stat.h> 77 #include <sys/systm.h> 78 #include <sys/syslog.h> 79 #include <sys/proc.h> 80 #include <sys/priv.h> 81 82 #include <sys/thread2.h> 83 #include <sys/socketvar2.h> 84 #include <sys/msgport2.h> 85 86 #include <net/if.h> 87 #include <net/route.h> 88 #include <net/if_types.h> 89 #include <net/netisr2.h> 90 91 #include <netinet/in.h> 92 #include <netinet/in_systm.h> 93 #include <netinet/ip.h> 94 #include <netinet/in_pcb.h> 95 #include <netinet/in_var.h> 96 #include <netinet/ip_var.h> 97 #include <netinet/udp.h> 98 #include <netinet/udp_var.h> 99 #include <netinet/ip6.h> 100 #include <netinet6/ip6_var.h> 101 #include <netinet6/in6_pcb.h> 102 #include <netinet/icmp6.h> 103 #include <netinet6/udp6_var.h> 104 #include <netinet6/ip6protosw.h> 105 106 #ifdef IPSEC 107 #include <netinet6/ipsec.h> 108 #include <netinet6/ipsec6.h> 109 #endif /* IPSEC */ 110 111 #ifdef FAST_IPSEC 112 #include <netproto/ipsec/ipsec.h> 113 #include <netproto/ipsec/ipsec6.h> 114 #endif /* FAST_IPSEC */ 115 116 /* 117 * UDP protocol inplementation. 118 * Per RFC 768, August, 1980. 119 */ 120 121 extern struct protosw inetsw[]; 122 static int in6_mcmatch (struct inpcb *, struct in6_addr *, struct ifnet *); 123 124 static int 125 in6_mcmatch(struct inpcb *in6p, struct in6_addr *ia6, struct ifnet *ifp) 126 { 127 struct ip6_moptions *im6o = in6p->in6p_moptions; 128 struct in6_multi_mship *imm; 129 130 if (im6o == NULL) 131 return 0; 132 133 for (imm = im6o->im6o_memberships.lh_first; imm != NULL; 134 imm = imm->i6mm_chain.le_next) { 135 if ((ifp == NULL || 136 imm->i6mm_maddr->in6m_ifp == ifp) && 137 IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr, 138 ia6)) 139 return 1; 140 } 141 return 0; 142 } 143 144 int 145 udp6_input(struct mbuf **mp, int *offp, int proto) 146 { 147 struct mbuf *m = *mp; 148 struct ip6_hdr *ip6; 149 struct udphdr *uh; 150 struct inpcb *in6p; 151 struct mbuf *opts = NULL; 152 int off = *offp; 153 int plen, ulen; 154 struct sockaddr_in6 udp_in6; 155 struct socket *so; 156 struct inpcbinfo *pcbinfo = &udbinfo[0]; 157 158 IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE); 159 160 ip6 = mtod(m, struct ip6_hdr *); 161 162 udp_stat.udps_ipackets++; 163 164 plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6); 165 uh = (struct udphdr *)((caddr_t)ip6 + off); 166 ulen = ntohs((u_short)uh->uh_ulen); 167 168 if (plen != ulen) { 169 udp_stat.udps_badlen++; 170 goto bad; 171 } 172 173 /* 174 * Checksum extended UDP header and data. 175 */ 176 if (uh->uh_sum == 0) 177 udp_stat.udps_nosum++; 178 else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) { 179 udp_stat.udps_badsum++; 180 goto bad; 181 } 182 183 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 184 struct inpcb *last, *marker; 185 186 /* 187 * Deliver a multicast datagram to all sockets 188 * for which the local and remote addresses and ports match 189 * those of the incoming datagram. This allows more than 190 * one process to receive multicasts on the same port. 191 * (This really ought to be done for unicast datagrams as 192 * well, but that would cause problems with existing 193 * applications that open both address-specific sockets and 194 * a wildcard socket listening to the same port -- they would 195 * end up receiving duplicates of every unicast datagram. 196 * Those applications open the multiple sockets to overcome an 197 * inadequacy of the UDP socket interface, but for backwards 198 * compatibility we avoid the problem here rather than 199 * fixing the interface. Maybe 4.5BSD will remedy this?) 200 */ 201 202 /* 203 * In a case that laddr should be set to the link-local 204 * address (this happens in RIPng), the multicast address 205 * specified in the received packet does not match with 206 * laddr. To cure this situation, the matching is relaxed 207 * if the receiving interface is the same as one specified 208 * in the socket and if the destination multicast address 209 * matches one of the multicast groups specified in the socket. 210 */ 211 212 /* 213 * Construct sockaddr format source address. 214 */ 215 init_sin6(&udp_in6, m); /* general init */ 216 udp_in6.sin6_port = uh->uh_sport; 217 /* 218 * KAME note: traditionally we dropped udpiphdr from mbuf here. 219 * We need udphdr for IPsec processing so we do that later. 220 */ 221 222 /* 223 * Locate pcb(s) for datagram. 224 * (Algorithm copied from raw_intr().) 225 */ 226 last = NULL; 227 228 marker = in_pcbmarker(); 229 230 GET_PCBINFO_TOKEN(pcbinfo); 231 232 LIST_INSERT_HEAD(&pcbinfo->pcblisthead, marker, inp_list); 233 while ((in6p = LIST_NEXT(marker, inp_list)) != NULL) { 234 LIST_REMOVE(marker, inp_list); 235 LIST_INSERT_AFTER(in6p, marker, inp_list); 236 237 if (in6p->inp_flags & INP_PLACEMARKER) 238 continue; 239 if (!INP_ISIPV6(in6p)) 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 LIST_REMOVE(marker, inp_list); 321 322 REL_PCBINFO_TOKEN(pcbinfo); 323 324 if (last == NULL) { 325 /* 326 * No matching pcb found; discard datagram. 327 * (No need to send an ICMP Port Unreachable 328 * for a broadcast or multicast datgram.) 329 */ 330 udp_stat.udps_noport++; 331 udp_stat.udps_noportmcast++; 332 goto bad; 333 } 334 #ifdef IPSEC 335 /* 336 * Check AH/ESP integrity. 337 */ 338 if (ipsec6_in_reject_so(m, last->inp_socket)) { 339 ipsec6stat.in_polvio++; 340 goto bad; 341 } 342 #endif /* IPSEC */ 343 #ifdef FAST_IPSEC 344 /* 345 * Check AH/ESP integrity. 346 */ 347 if (ipsec6_in_reject(m, last)) { 348 goto bad; 349 } 350 #endif /* FAST_IPSEC */ 351 if (last->in6p_flags & IN6P_CONTROLOPTS 352 || last->in6p_socket->so_options & SO_TIMESTAMP) 353 ip6_savecontrol(last, &opts, ip6, m); 354 355 m_adj(m, off + sizeof(struct udphdr)); 356 so = last->in6p_socket; 357 lwkt_gettoken(&so->so_rcv.ssb_token); 358 if (ssb_appendaddr(&so->so_rcv, (struct sockaddr *)&udp_in6, 359 m, opts) == 0) { 360 udp_stat.udps_fullsock++; 361 lwkt_reltoken(&so->so_rcv.ssb_token); 362 goto bad; 363 } 364 sorwakeup(so); 365 lwkt_reltoken(&so->so_rcv.ssb_token); 366 return IPPROTO_DONE; 367 } 368 /* 369 * Locate pcb for datagram. 370 */ 371 in6p = in6_pcblookup_hash(pcbinfo, &ip6->ip6_src, uh->uh_sport, 372 &ip6->ip6_dst, uh->uh_dport, 1, 373 m->m_pkthdr.rcvif); 374 if (in6p == NULL) { 375 if (log_in_vain) { 376 char buf[INET6_ADDRSTRLEN]; 377 378 strcpy(buf, ip6_sprintf(&ip6->ip6_dst)); 379 log(LOG_INFO, 380 "Connection attempt to UDP [%s]:%d from [%s]:%d\n", 381 buf, ntohs(uh->uh_dport), 382 ip6_sprintf(&ip6->ip6_src), ntohs(uh->uh_sport)); 383 } 384 udp_stat.udps_noport++; 385 if (m->m_flags & M_MCAST) { 386 kprintf("UDP6: M_MCAST is set in a unicast packet.\n"); 387 udp_stat.udps_noportmcast++; 388 goto bad; 389 } 390 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0); 391 return IPPROTO_DONE; 392 } 393 #ifdef IPSEC 394 /* 395 * Check AH/ESP integrity. 396 */ 397 if (ipsec6_in_reject_so(m, in6p->in6p_socket)) { 398 ipsec6stat.in_polvio++; 399 goto bad; 400 } 401 #endif /* IPSEC */ 402 #ifdef FAST_IPSEC 403 /* 404 * Check AH/ESP integrity. 405 */ 406 if (ipsec6_in_reject(m, in6p)) { 407 goto bad; 408 } 409 #endif /* FAST_IPSEC */ 410 411 /* 412 * Construct sockaddr format source address. 413 * Stuff source address and datagram in user buffer. 414 */ 415 init_sin6(&udp_in6, m); /* general init */ 416 udp_in6.sin6_port = uh->uh_sport; 417 if (in6p->in6p_flags & IN6P_CONTROLOPTS 418 || in6p->in6p_socket->so_options & SO_TIMESTAMP) 419 ip6_savecontrol(in6p, &opts, ip6, m); 420 m_adj(m, off + sizeof(struct udphdr)); 421 so = in6p->in6p_socket; 422 lwkt_gettoken(&so->so_rcv.ssb_token); 423 if (ssb_appendaddr(&so->so_rcv, (struct sockaddr *)&udp_in6, 424 m, opts) == 0) { 425 udp_stat.udps_fullsock++; 426 lwkt_reltoken(&so->so_rcv.ssb_token); 427 goto bad; 428 } 429 sorwakeup(so); 430 lwkt_reltoken(&so->so_rcv.ssb_token); 431 return IPPROTO_DONE; 432 bad: 433 if (m) 434 m_freem(m); 435 if (opts) 436 m_freem(opts); 437 return IPPROTO_DONE; 438 } 439 440 void 441 udp6_ctlinput(netmsg_t msg) 442 { 443 int cmd = msg->ctlinput.nm_cmd; 444 struct sockaddr *sa = msg->ctlinput.nm_arg; 445 void *d = msg->ctlinput.nm_extra; 446 struct udphdr uh; 447 struct ip6_hdr *ip6; 448 struct mbuf *m; 449 int off = 0; 450 struct ip6ctlparam *ip6cp = NULL; 451 const struct sockaddr_in6 *sa6_src = NULL; 452 inp_notify_t notify = udp_notify; 453 struct udp_portonly { 454 u_int16_t uh_sport; 455 u_int16_t uh_dport; 456 } *uhp; 457 458 if (sa->sa_family != AF_INET6 || 459 sa->sa_len != sizeof(struct sockaddr_in6)) 460 goto out; 461 462 if ((unsigned)cmd >= PRC_NCMDS) 463 goto out; 464 if (PRC_IS_REDIRECT(cmd)) 465 notify = in6_rtchange, d = NULL; 466 else if (cmd == PRC_HOSTDEAD) 467 d = NULL; 468 else if (inet6ctlerrmap[cmd] == 0) 469 goto out; 470 471 /* if the parameter is from icmp6, decode it. */ 472 if (d != NULL) { 473 ip6cp = (struct ip6ctlparam *)d; 474 m = ip6cp->ip6c_m; 475 ip6 = ip6cp->ip6c_ip6; 476 off = ip6cp->ip6c_off; 477 sa6_src = ip6cp->ip6c_src; 478 } else { 479 m = NULL; 480 ip6 = NULL; 481 sa6_src = &sa6_any; 482 } 483 484 if (ip6) { 485 /* 486 * XXX: We assume that when IPV6 is non NULL, 487 * M and OFF are valid. 488 */ 489 490 /* check if we can safely examine src and dst ports */ 491 if (m->m_pkthdr.len < off + sizeof(*uhp)) 492 return; 493 494 bzero(&uh, sizeof(uh)); 495 m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh); 496 497 in6_pcbnotify(&udbinfo[0], sa, uh.uh_dport, 498 (struct sockaddr *)ip6cp->ip6c_src, uh.uh_sport, 499 cmd, 0, notify); 500 } else { 501 in6_pcbnotify(&udbinfo[0], sa, 0, 502 (const struct sockaddr *)sa6_src, 0, 503 cmd, 0, notify); 504 } 505 out: 506 lwkt_replymsg(&msg->ctlinput.base.lmsg, 0); 507 } 508 509 static int 510 udp6_getcred(SYSCTL_HANDLER_ARGS) 511 { 512 struct sockaddr_in6 addrs[2]; 513 struct inpcb *inp; 514 int error; 515 516 error = priv_check(req->td, PRIV_ROOT); 517 if (error) 518 return (error); 519 520 if (req->newlen != sizeof(addrs)) 521 return (EINVAL); 522 if (req->oldlen != sizeof(struct ucred)) 523 return (EINVAL); 524 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 525 if (error) 526 return (error); 527 crit_enter(); 528 inp = in6_pcblookup_hash(&udbinfo[0], &addrs[1].sin6_addr, 529 addrs[1].sin6_port, 530 &addrs[0].sin6_addr, addrs[0].sin6_port, 531 1, NULL); 532 if (!inp || !inp->inp_socket) { 533 error = ENOENT; 534 goto out; 535 } 536 error = SYSCTL_OUT(req, inp->inp_socket->so_cred, 537 sizeof(struct ucred)); 538 539 out: 540 crit_exit(); 541 return (error); 542 } 543 544 SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW, 545 0, 0, 546 udp6_getcred, "S,ucred", "Get the ucred of a UDP6 connection"); 547 548 /* 549 * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort() 550 * will sofree() it when we return. 551 */ 552 static void 553 udp6_abort(netmsg_t msg) 554 { 555 struct socket *so = msg->abort.base.nm_so; 556 struct inpcb *inp; 557 int error; 558 559 inp = so->so_pcb; 560 if (inp) { 561 soisdisconnected(so); 562 563 in6_pcbdetach(inp); 564 error = 0; 565 } else { 566 error = EINVAL; 567 } 568 lwkt_replymsg(&msg->abort.base.lmsg, error); 569 } 570 571 static void 572 udp6_attach(netmsg_t msg) 573 { 574 struct socket *so = msg->attach.base.nm_so; 575 struct pru_attach_info *ai = msg->attach.nm_ai; 576 struct inpcb *inp; 577 int error; 578 579 inp = so->so_pcb; 580 if (inp != NULL) { 581 error = EINVAL; 582 goto out; 583 } 584 585 if (so->so_snd.ssb_hiwat == 0 || so->so_rcv.ssb_hiwat == 0) { 586 error = soreserve(so, udp_sendspace, udp_recvspace, 587 ai->sb_rlimit); 588 if (error) 589 goto out; 590 } 591 592 error = in_pcballoc(so, &udbinfo[0]); 593 if (error) 594 goto out; 595 596 inp = (struct inpcb *)so->so_pcb; 597 inp->in6p_hops = -1; /* use kernel default */ 598 inp->in6p_cksum = -1; /* just to be sure */ 599 /* 600 * XXX: ugly!! 601 * IPv4 TTL initialization is necessary for an IPv6 socket as well, 602 * because the socket may be bound to an IPv6 wildcard address, 603 * which may match an IPv4-mapped IPv6 address. 604 */ 605 inp->inp_ip_ttl = ip_defttl; 606 error = 0; 607 out: 608 lwkt_replymsg(&msg->attach.base.lmsg, error); 609 } 610 611 static void 612 udp6_bind(netmsg_t msg) 613 { 614 struct socket *so =msg->bind.base.nm_so; 615 struct sockaddr *nam = msg->bind.nm_nam; 616 struct thread *td = msg->bind.nm_td; 617 struct sockaddr_in6 *sin6_p = (struct sockaddr_in6 *)nam; 618 struct inpcb *inp; 619 int error; 620 621 inp = so->so_pcb; 622 if (inp == NULL) { 623 error = EINVAL; 624 goto out; 625 } 626 627 error = in6_pcbbind(inp, nam, td); 628 if (error == 0) { 629 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) 630 inp->inp_flags |= INP_WASBOUND_NOTANY; 631 in_pcbinswildcardhash(inp); 632 } 633 out: 634 lwkt_replymsg(&msg->bind.base.lmsg, error); 635 } 636 637 static void 638 udp6_connect(netmsg_t msg) 639 { 640 struct socket *so = msg->connect.base.nm_so; 641 struct sockaddr *nam = msg->connect.nm_nam; 642 struct thread *td = msg->connect.nm_td; 643 struct sockaddr_in6 *sin6_p; 644 struct inpcb *inp; 645 int error; 646 647 inp = so->so_pcb; 648 if (inp == NULL) { 649 error = EINVAL; 650 goto out; 651 } 652 653 sin6_p = (struct sockaddr_in6 *)nam; 654 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 655 error = EADDRNOTAVAIL; 656 goto out; 657 } 658 659 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 660 error = EISCONN; 661 goto out; 662 } 663 if (inp->inp_flags & INP_WILDCARD) 664 in_pcbremwildcardhash(inp); 665 if (!prison_remote_ip(td, nam)) { 666 error = EAFNOSUPPORT; /* IPv4 only jail */ 667 goto out; 668 } 669 error = in6_pcbconnect(inp, nam, td); 670 if (error == 0) { 671 soisconnected(so); 672 } else if (error == EAFNOSUPPORT) { /* connection dissolved */ 673 /* 674 * Follow traditional BSD behavior and retain 675 * the local port binding. But, fix the old misbehavior 676 * of overwriting any previously bound local address. 677 */ 678 if (!(inp->inp_flags & INP_WASBOUND_NOTANY)) 679 inp->in6p_laddr = kin6addr_any; 680 in_pcbinswildcardhash(inp); 681 } 682 out: 683 lwkt_replymsg(&msg->connect.base.lmsg, error); 684 } 685 686 static void 687 udp6_detach(netmsg_t msg) 688 { 689 struct socket *so = msg->detach.base.nm_so; 690 struct inpcb *inp; 691 int error; 692 693 inp = so->so_pcb; 694 if (inp) { 695 in6_pcbdetach(inp); 696 error = 0; 697 } else { 698 error = EINVAL; 699 } 700 lwkt_replymsg(&msg->detach.base.lmsg, error); 701 } 702 703 static void 704 udp6_disconnect(netmsg_t msg) 705 { 706 struct socket *so = msg->disconnect.base.nm_so; 707 struct inpcb *inp; 708 int error; 709 710 inp = so->so_pcb; 711 if (inp == NULL) { 712 error = EINVAL; 713 goto out; 714 } 715 716 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 717 error = ENOTCONN; 718 } else { 719 in6_pcbdisconnect(inp); 720 soclrstate(so, SS_ISCONNECTED); /* XXX */ 721 error = 0; 722 } 723 out: 724 lwkt_replymsg(&msg->disconnect.base.lmsg, error); 725 } 726 727 static void 728 udp6_send(netmsg_t msg) 729 { 730 struct socket *so = msg->send.base.nm_so; 731 struct mbuf *m = msg->send.nm_m; 732 struct sockaddr *addr = msg->send.nm_addr; 733 struct mbuf *control = msg->send.nm_control; 734 struct thread *td = msg->send.nm_td; 735 struct inpcb *inp; 736 int error = 0; 737 738 inp = so->so_pcb; 739 if (inp == NULL) { 740 error = EINVAL; 741 goto bad; 742 } 743 744 if (addr) { 745 struct sockaddr_in6 *sin6; 746 747 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 748 error = EINVAL; 749 goto bad; 750 } 751 if (addr->sa_family != AF_INET6) { 752 error = EAFNOSUPPORT; 753 goto bad; 754 } 755 756 sin6 = (struct sockaddr_in6 *)addr; 757 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 758 error = EADDRNOTAVAIL; 759 goto bad; 760 } 761 } 762 763 error = udp6_output(inp, m, addr, control, td); 764 lwkt_replymsg(&msg->send.base.lmsg, error); 765 return; 766 bad: 767 m_freem(m); 768 lwkt_replymsg(&msg->send.base.lmsg, error); 769 } 770 771 struct pr_usrreqs udp6_usrreqs = { 772 .pru_abort = udp6_abort, 773 .pru_accept = pr_generic_notsupp, 774 .pru_attach = udp6_attach, 775 .pru_bind = udp6_bind, 776 .pru_connect = udp6_connect, 777 .pru_connect2 = pr_generic_notsupp, 778 .pru_control = in6_control_dispatch, 779 .pru_detach = udp6_detach, 780 .pru_disconnect = udp6_disconnect, 781 .pru_listen = pr_generic_notsupp, 782 .pru_peeraddr = in6_setpeeraddr_dispatch, 783 .pru_rcvd = pr_generic_notsupp, 784 .pru_rcvoob = pr_generic_notsupp, 785 .pru_send = udp6_send, 786 .pru_sense = pru_sense_null, 787 .pru_shutdown = udp_shutdown, 788 .pru_sockaddr = in6_setsockaddr_dispatch, 789 .pru_sosend = sosend, 790 .pru_soreceive = soreceive 791 }; 792 793