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 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 udpstat.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 udpstat.udps_badlen++; 179 goto bad; 180 } 181 182 /* 183 * Checksum extended UDP header and data. 184 */ 185 if (uh->uh_sum == 0) 186 udpstat.udps_nosum++; 187 else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) { 188 udpstat.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 if (in6p->inp_flags & INP_PLACEMARKER) 238 continue; 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 udpstat.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 udpstat.udps_noport++; 328 udpstat.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 udpstat.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 udpstat.udps_noport++; 382 if (m->m_flags & M_MCAST) { 383 kprintf("UDP6: M_MCAST is set in a unicast packet.\n"); 384 udpstat.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 udpstat.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 in6_pcbdetach(inp); 560 error = 0; 561 } else { 562 error = EINVAL; 563 } 564 lwkt_replymsg(&msg->abort.base.lmsg, error); 565 } 566 567 static void 568 udp6_attach(netmsg_t msg) 569 { 570 struct socket *so = msg->attach.base.nm_so; 571 struct pru_attach_info *ai = msg->attach.nm_ai; 572 struct inpcb *inp; 573 int error; 574 575 inp = so->so_pcb; 576 if (inp != NULL) { 577 error = EINVAL; 578 goto out; 579 } 580 581 if (so->so_snd.ssb_hiwat == 0 || so->so_rcv.ssb_hiwat == 0) { 582 error = soreserve(so, udp_sendspace, udp_recvspace, 583 ai->sb_rlimit); 584 if (error) 585 goto out; 586 } 587 crit_enter(); 588 error = in_pcballoc(so, &udbinfo); 589 crit_exit(); 590 if (error) 591 goto out; 592 sosetport(so, cpu_portfn(0)); 593 inp = (struct inpcb *)so->so_pcb; 594 inp->inp_vflag |= INP_IPV6; 595 if (!ip6_v6only) 596 inp->inp_vflag |= INP_IPV4; 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 inp->inp_vflag &= ~INP_IPV4; 628 inp->inp_vflag |= INP_IPV6; 629 if (!(inp->inp_flags & IN6P_IPV6_V6ONLY)) { 630 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) 631 inp->inp_vflag |= INP_IPV4; 632 else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 633 struct sockaddr_in sin; 634 635 in6_sin6_2_sin(&sin, sin6_p); 636 inp->inp_vflag |= INP_IPV4; 637 inp->inp_vflag &= ~INP_IPV6; 638 crit_enter(); 639 error = in_pcbbind(inp, (struct sockaddr *)&sin, td); 640 crit_exit(); 641 goto out; 642 } 643 } 644 645 crit_enter(); 646 error = in6_pcbbind(inp, nam, td); 647 crit_exit(); 648 if (error == 0) { 649 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) 650 inp->inp_flags |= INP_WASBOUND_NOTANY; 651 in_pcbinswildcardhash(inp); 652 } 653 out: 654 lwkt_replymsg(&msg->bind.base.lmsg, error); 655 } 656 657 static void 658 udp6_connect(netmsg_t msg) 659 { 660 struct socket *so = msg->connect.base.nm_so; 661 struct sockaddr *nam = msg->connect.nm_nam; 662 struct thread *td = msg->connect.nm_td; 663 struct inpcb *inp; 664 int error; 665 666 inp = so->so_pcb; 667 if (inp == NULL) { 668 error = EINVAL; 669 goto out; 670 } 671 672 if (!(inp->inp_flags & IN6P_IPV6_V6ONLY)) { 673 struct sockaddr_in6 *sin6_p; 674 675 sin6_p = (struct sockaddr_in6 *)nam; 676 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 677 struct sockaddr_in sin; 678 679 if (inp->inp_faddr.s_addr != INADDR_ANY) { 680 error = EISCONN; 681 goto out; 682 } 683 in6_sin6_2_sin(&sin, sin6_p); 684 crit_enter(); 685 error = in_pcbconnect(inp, (struct sockaddr *)&sin, td); 686 crit_exit(); 687 if (error == 0) { 688 inp->inp_vflag |= INP_IPV4; 689 inp->inp_vflag &= ~INP_IPV6; 690 soisconnected(so); 691 } 692 goto out; 693 } 694 } 695 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 696 error = EISCONN; 697 goto out; 698 } 699 if (inp->inp_flags & INP_WILDCARD) 700 in_pcbremwildcardhash(inp); 701 if (!prison_remote_ip(td, nam)) { 702 error = EAFNOSUPPORT; /* IPv4 only jail */ 703 goto out; 704 } 705 crit_enter(); 706 error = in6_pcbconnect(inp, nam, td); 707 crit_exit(); 708 if (error == 0) { 709 if (!ip6_v6only) { /* should be non mapped addr */ 710 inp->inp_vflag &= ~INP_IPV4; 711 inp->inp_vflag |= INP_IPV6; 712 } 713 soisconnected(so); 714 } else if (error == EAFNOSUPPORT) { /* connection dissolved */ 715 /* 716 * Follow traditional BSD behavior and retain 717 * the local port binding. But, fix the old misbehavior 718 * of overwriting any previously bound local address. 719 */ 720 if (!(inp->inp_flags & INP_WASBOUND_NOTANY)) 721 inp->in6p_laddr = kin6addr_any; 722 in_pcbinswildcardhash(inp); 723 } 724 out: 725 lwkt_replymsg(&msg->connect.base.lmsg, error); 726 } 727 728 static void 729 udp6_detach(netmsg_t msg) 730 { 731 struct socket *so = msg->detach.base.nm_so; 732 struct inpcb *inp; 733 int error; 734 735 inp = so->so_pcb; 736 if (inp) { 737 crit_enter(); 738 in6_pcbdetach(inp); 739 crit_exit(); 740 error = 0; 741 } else { 742 error = EINVAL; 743 } 744 lwkt_replymsg(&msg->detach.base.lmsg, error); 745 } 746 747 static void 748 udp6_disconnect(netmsg_t msg) 749 { 750 struct socket *so = msg->disconnect.base.nm_so; 751 struct inpcb *inp; 752 int error; 753 754 inp = so->so_pcb; 755 if (inp == NULL) { 756 error = EINVAL; 757 goto out; 758 } 759 760 if (inp->inp_vflag & INP_IPV4) { 761 const struct pr_usrreqs *pru; 762 763 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs; 764 pru->pru_disconnect(msg); /* XXX on right port? */ 765 return; 766 } 767 768 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 769 error = ENOTCONN; 770 } else { 771 crit_enter(); 772 in6_pcbdisconnect(inp); 773 crit_exit(); 774 soclrstate(so, SS_ISCONNECTED); /* XXX */ 775 error = 0; 776 } 777 out: 778 lwkt_replymsg(&msg->disconnect.base.lmsg, error); 779 } 780 781 static void 782 udp6_send(netmsg_t msg) 783 { 784 struct socket *so = msg->send.base.nm_so; 785 struct mbuf *m = msg->send.nm_m; 786 struct sockaddr *addr = msg->send.nm_addr; 787 struct mbuf *control = msg->send.nm_control; 788 struct thread *td = msg->send.nm_td; 789 struct inpcb *inp; 790 int error = 0; 791 792 inp = so->so_pcb; 793 if (inp == NULL) { 794 error = EINVAL; 795 goto bad; 796 } 797 798 if (addr) { 799 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 800 error = EINVAL; 801 goto bad; 802 } 803 if (addr->sa_family != AF_INET6) { 804 error = EAFNOSUPPORT; 805 goto bad; 806 } 807 } 808 809 if (!ip6_v6only) { 810 int hasv4addr; 811 struct sockaddr_in6 *sin6 = 0; 812 813 if (addr == NULL) 814 hasv4addr = (inp->inp_vflag & INP_IPV4); 815 else { 816 sin6 = (struct sockaddr_in6 *)addr; 817 hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) 818 ? 1 : 0; 819 } 820 if (hasv4addr) { 821 const struct pr_usrreqs *pru; 822 823 if (sin6) 824 in6_sin6_2_sin_in_sock(addr); 825 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs; 826 pru->pru_send(msg); 827 /* msg invalid now */ 828 return; 829 } 830 } 831 832 error = udp6_output(inp, m, addr, control, td); 833 lwkt_replymsg(&msg->send.base.lmsg, error); 834 return; 835 bad: 836 m_freem(m); 837 lwkt_replymsg(&msg->send.base.lmsg, error); 838 } 839 840 struct pr_usrreqs udp6_usrreqs = { 841 .pru_abort = udp6_abort, 842 .pru_accept = pr_generic_notsupp, 843 .pru_attach = udp6_attach, 844 .pru_bind = udp6_bind, 845 .pru_connect = udp6_connect, 846 .pru_connect2 = pr_generic_notsupp, 847 .pru_control = in6_control_dispatch, 848 .pru_detach = udp6_detach, 849 .pru_disconnect = udp6_disconnect, 850 .pru_listen = pr_generic_notsupp, 851 .pru_peeraddr = in6_mapped_peeraddr_dispatch, 852 .pru_rcvd = pr_generic_notsupp, 853 .pru_rcvoob = pr_generic_notsupp, 854 .pru_send = udp6_send, 855 .pru_sense = pru_sense_null, 856 .pru_shutdown = udp_shutdown, 857 .pru_sockaddr = in6_mapped_sockaddr_dispatch, 858 .pru_sosend = sosend, 859 .pru_soreceive = soreceive 860 }; 861 862