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 if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 163 /* XXX send icmp6 host/port unreach? */ 164 m_freem(m); 165 return IPPROTO_DONE; 166 } 167 168 udp_stat.udps_ipackets++; 169 170 plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6); 171 uh = (struct udphdr *)((caddr_t)ip6 + off); 172 ulen = ntohs((u_short)uh->uh_ulen); 173 174 if (plen != ulen) { 175 udp_stat.udps_badlen++; 176 goto bad; 177 } 178 179 /* 180 * Checksum extended UDP header and data. 181 */ 182 if (uh->uh_sum == 0) 183 udp_stat.udps_nosum++; 184 else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) { 185 udp_stat.udps_badsum++; 186 goto bad; 187 } 188 189 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 190 struct inpcb *last, *marker; 191 192 /* 193 * Deliver a multicast datagram to all sockets 194 * for which the local and remote addresses and ports match 195 * those of the incoming datagram. This allows more than 196 * one process to receive multicasts on the same port. 197 * (This really ought to be done for unicast datagrams as 198 * well, but that would cause problems with existing 199 * applications that open both address-specific sockets and 200 * a wildcard socket listening to the same port -- they would 201 * end up receiving duplicates of every unicast datagram. 202 * Those applications open the multiple sockets to overcome an 203 * inadequacy of the UDP socket interface, but for backwards 204 * compatibility we avoid the problem here rather than 205 * fixing the interface. Maybe 4.5BSD will remedy this?) 206 */ 207 208 /* 209 * In a case that laddr should be set to the link-local 210 * address (this happens in RIPng), the multicast address 211 * specified in the received packet does not match with 212 * laddr. To cure this situation, the matching is relaxed 213 * if the receiving interface is the same as one specified 214 * in the socket and if the destination multicast address 215 * matches one of the multicast groups specified in the socket. 216 */ 217 218 /* 219 * Construct sockaddr format source address. 220 */ 221 init_sin6(&udp_in6, m); /* general init */ 222 udp_in6.sin6_port = uh->uh_sport; 223 /* 224 * KAME note: traditionally we dropped udpiphdr from mbuf here. 225 * We need udphdr for IPsec processing so we do that later. 226 */ 227 228 /* 229 * Locate pcb(s) for datagram. 230 * (Algorithm copied from raw_intr().) 231 */ 232 last = NULL; 233 234 marker = in_pcbmarker(mycpuid); 235 236 GET_PCBINFO_TOKEN(pcbinfo); 237 238 LIST_INSERT_HEAD(&pcbinfo->pcblisthead, marker, inp_list); 239 while ((in6p = LIST_NEXT(marker, inp_list)) != NULL) { 240 LIST_REMOVE(marker, inp_list); 241 LIST_INSERT_AFTER(in6p, marker, inp_list); 242 243 if (in6p->inp_flags & INP_PLACEMARKER) 244 continue; 245 if (!(in6p->inp_vflag & INP_IPV6)) 246 continue; 247 if (in6p->in6p_lport != uh->uh_dport) 248 continue; 249 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { 250 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, 251 &ip6->ip6_dst) && 252 !in6_mcmatch(in6p, &ip6->ip6_dst, 253 m->m_pkthdr.rcvif)) 254 continue; 255 } 256 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 257 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, 258 &ip6->ip6_src) || 259 in6p->in6p_fport != uh->uh_sport) 260 continue; 261 } 262 263 if (last != NULL) { 264 struct mbuf *n; 265 266 #ifdef IPSEC 267 /* 268 * Check AH/ESP integrity. 269 */ 270 if (ipsec6_in_reject_so(m, last->inp_socket)) 271 ipsec6stat.in_polvio++; 272 /* do not inject data into pcb */ 273 else 274 #endif /* IPSEC */ 275 #ifdef FAST_IPSEC 276 /* 277 * Check AH/ESP integrity. 278 */ 279 if (ipsec6_in_reject(m, last)) 280 ; 281 else 282 #endif /* FAST_IPSEC */ 283 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { 284 /* 285 * KAME NOTE: do not 286 * m_copy(m, offset, ...) above. 287 * ssb_appendaddr() expects M_PKTHDR, 288 * and m_copy() will copy M_PKTHDR 289 * only if offset is 0. 290 */ 291 so = last->in6p_socket; 292 if ((last->in6p_flags & IN6P_CONTROLOPTS) || 293 (so->so_options & SO_TIMESTAMP)) { 294 ip6_savecontrol(last, &opts, 295 ip6, n); 296 } 297 m_adj(n, off + sizeof(struct udphdr)); 298 lwkt_gettoken(&so->so_rcv.ssb_token); 299 if (ssb_appendaddr(&so->so_rcv, 300 (struct sockaddr *)&udp_in6, 301 n, opts) == 0) { 302 m_freem(n); 303 if (opts) 304 m_freem(opts); 305 udp_stat.udps_fullsock++; 306 } else { 307 sorwakeup(so); 308 } 309 lwkt_reltoken(&so->so_rcv.ssb_token); 310 opts = NULL; 311 } 312 } 313 last = in6p; 314 /* 315 * Don't look for additional matches if this one does 316 * not have either the SO_REUSEPORT or SO_REUSEADDR 317 * socket options set. This heuristic avoids searching 318 * through all pcbs in the common case of a non-shared 319 * port. It assumes that an application will never 320 * clear these options after setting them. 321 */ 322 if ((last->in6p_socket->so_options & 323 (SO_REUSEPORT | SO_REUSEADDR)) == 0) 324 break; 325 } 326 LIST_REMOVE(marker, inp_list); 327 328 REL_PCBINFO_TOKEN(pcbinfo); 329 330 if (last == NULL) { 331 /* 332 * No matching pcb found; discard datagram. 333 * (No need to send an ICMP Port Unreachable 334 * for a broadcast or multicast datgram.) 335 */ 336 udp_stat.udps_noport++; 337 udp_stat.udps_noportmcast++; 338 goto bad; 339 } 340 #ifdef IPSEC 341 /* 342 * Check AH/ESP integrity. 343 */ 344 if (ipsec6_in_reject_so(m, last->inp_socket)) { 345 ipsec6stat.in_polvio++; 346 goto bad; 347 } 348 #endif /* IPSEC */ 349 #ifdef FAST_IPSEC 350 /* 351 * Check AH/ESP integrity. 352 */ 353 if (ipsec6_in_reject(m, last)) { 354 goto bad; 355 } 356 #endif /* FAST_IPSEC */ 357 if (last->in6p_flags & IN6P_CONTROLOPTS 358 || last->in6p_socket->so_options & SO_TIMESTAMP) 359 ip6_savecontrol(last, &opts, ip6, m); 360 361 m_adj(m, off + sizeof(struct udphdr)); 362 so = last->in6p_socket; 363 lwkt_gettoken(&so->so_rcv.ssb_token); 364 if (ssb_appendaddr(&so->so_rcv, (struct sockaddr *)&udp_in6, 365 m, opts) == 0) { 366 udp_stat.udps_fullsock++; 367 lwkt_reltoken(&so->so_rcv.ssb_token); 368 goto bad; 369 } 370 sorwakeup(so); 371 lwkt_reltoken(&so->so_rcv.ssb_token); 372 return IPPROTO_DONE; 373 } 374 /* 375 * Locate pcb for datagram. 376 */ 377 in6p = in6_pcblookup_hash(pcbinfo, &ip6->ip6_src, uh->uh_sport, 378 &ip6->ip6_dst, uh->uh_dport, 1, 379 m->m_pkthdr.rcvif); 380 if (in6p == NULL) { 381 if (log_in_vain) { 382 char buf[INET6_ADDRSTRLEN]; 383 384 strcpy(buf, ip6_sprintf(&ip6->ip6_dst)); 385 log(LOG_INFO, 386 "Connection attempt to UDP [%s]:%d from [%s]:%d\n", 387 buf, ntohs(uh->uh_dport), 388 ip6_sprintf(&ip6->ip6_src), ntohs(uh->uh_sport)); 389 } 390 udp_stat.udps_noport++; 391 if (m->m_flags & M_MCAST) { 392 kprintf("UDP6: M_MCAST is set in a unicast packet.\n"); 393 udp_stat.udps_noportmcast++; 394 goto bad; 395 } 396 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0); 397 return IPPROTO_DONE; 398 } 399 #ifdef IPSEC 400 /* 401 * Check AH/ESP integrity. 402 */ 403 if (ipsec6_in_reject_so(m, in6p->in6p_socket)) { 404 ipsec6stat.in_polvio++; 405 goto bad; 406 } 407 #endif /* IPSEC */ 408 #ifdef FAST_IPSEC 409 /* 410 * Check AH/ESP integrity. 411 */ 412 if (ipsec6_in_reject(m, in6p)) { 413 goto bad; 414 } 415 #endif /* FAST_IPSEC */ 416 417 /* 418 * Construct sockaddr format source address. 419 * Stuff source address and datagram in user buffer. 420 */ 421 init_sin6(&udp_in6, m); /* general init */ 422 udp_in6.sin6_port = uh->uh_sport; 423 if (in6p->in6p_flags & IN6P_CONTROLOPTS 424 || in6p->in6p_socket->so_options & SO_TIMESTAMP) 425 ip6_savecontrol(in6p, &opts, ip6, m); 426 m_adj(m, off + sizeof(struct udphdr)); 427 so = in6p->in6p_socket; 428 lwkt_gettoken(&so->so_rcv.ssb_token); 429 if (ssb_appendaddr(&so->so_rcv, (struct sockaddr *)&udp_in6, 430 m, opts) == 0) { 431 udp_stat.udps_fullsock++; 432 lwkt_reltoken(&so->so_rcv.ssb_token); 433 goto bad; 434 } 435 sorwakeup(so); 436 lwkt_reltoken(&so->so_rcv.ssb_token); 437 return IPPROTO_DONE; 438 bad: 439 if (m) 440 m_freem(m); 441 if (opts) 442 m_freem(opts); 443 return IPPROTO_DONE; 444 } 445 446 void 447 udp6_ctlinput(netmsg_t msg) 448 { 449 int cmd = msg->ctlinput.nm_cmd; 450 struct sockaddr *sa = msg->ctlinput.nm_arg; 451 void *d = msg->ctlinput.nm_extra; 452 struct udphdr uh; 453 struct ip6_hdr *ip6; 454 struct mbuf *m; 455 int off = 0; 456 struct ip6ctlparam *ip6cp = NULL; 457 const struct sockaddr_in6 *sa6_src = NULL; 458 void (*notify) (struct inpcb *, int) = udp_notify; 459 struct udp_portonly { 460 u_int16_t uh_sport; 461 u_int16_t uh_dport; 462 } *uhp; 463 464 if (sa->sa_family != AF_INET6 || 465 sa->sa_len != sizeof(struct sockaddr_in6)) 466 goto out; 467 468 if ((unsigned)cmd >= PRC_NCMDS) 469 goto out; 470 if (PRC_IS_REDIRECT(cmd)) 471 notify = in6_rtchange, d = NULL; 472 else if (cmd == PRC_HOSTDEAD) 473 d = NULL; 474 else if (inet6ctlerrmap[cmd] == 0) 475 goto out; 476 477 /* if the parameter is from icmp6, decode it. */ 478 if (d != NULL) { 479 ip6cp = (struct ip6ctlparam *)d; 480 m = ip6cp->ip6c_m; 481 ip6 = ip6cp->ip6c_ip6; 482 off = ip6cp->ip6c_off; 483 sa6_src = ip6cp->ip6c_src; 484 } else { 485 m = NULL; 486 ip6 = NULL; 487 sa6_src = &sa6_any; 488 } 489 490 if (ip6) { 491 /* 492 * XXX: We assume that when IPV6 is non NULL, 493 * M and OFF are valid. 494 */ 495 496 /* check if we can safely examine src and dst ports */ 497 if (m->m_pkthdr.len < off + sizeof(*uhp)) 498 return; 499 500 bzero(&uh, sizeof(uh)); 501 m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh); 502 503 in6_pcbnotify(&udbinfo[0], sa, uh.uh_dport, 504 (struct sockaddr *)ip6cp->ip6c_src, uh.uh_sport, 505 cmd, 0, notify); 506 } else { 507 in6_pcbnotify(&udbinfo[0], sa, 0, 508 (const struct sockaddr *)sa6_src, 0, 509 cmd, 0, notify); 510 } 511 out: 512 lwkt_replymsg(&msg->ctlinput.base.lmsg, 0); 513 } 514 515 static int 516 udp6_getcred(SYSCTL_HANDLER_ARGS) 517 { 518 struct sockaddr_in6 addrs[2]; 519 struct inpcb *inp; 520 int error; 521 522 error = priv_check(req->td, PRIV_ROOT); 523 if (error) 524 return (error); 525 526 if (req->newlen != sizeof(addrs)) 527 return (EINVAL); 528 if (req->oldlen != sizeof(struct ucred)) 529 return (EINVAL); 530 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 531 if (error) 532 return (error); 533 crit_enter(); 534 inp = in6_pcblookup_hash(&udbinfo[0], &addrs[1].sin6_addr, 535 addrs[1].sin6_port, 536 &addrs[0].sin6_addr, addrs[0].sin6_port, 537 1, NULL); 538 if (!inp || !inp->inp_socket) { 539 error = ENOENT; 540 goto out; 541 } 542 error = SYSCTL_OUT(req, inp->inp_socket->so_cred, 543 sizeof(struct ucred)); 544 545 out: 546 crit_exit(); 547 return (error); 548 } 549 550 SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW, 551 0, 0, 552 udp6_getcred, "S,ucred", "Get the ucred of a UDP6 connection"); 553 554 /* 555 * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort() 556 * will sofree() it when we return. 557 */ 558 static void 559 udp6_abort(netmsg_t msg) 560 { 561 struct socket *so = msg->abort.base.nm_so; 562 struct inpcb *inp; 563 int error; 564 565 inp = so->so_pcb; 566 if (inp) { 567 soisdisconnected(so); 568 569 in6_pcbdetach(inp); 570 error = 0; 571 } else { 572 error = EINVAL; 573 } 574 lwkt_replymsg(&msg->abort.base.lmsg, error); 575 } 576 577 static void 578 udp6_attach(netmsg_t msg) 579 { 580 struct socket *so = msg->attach.base.nm_so; 581 struct pru_attach_info *ai = msg->attach.nm_ai; 582 struct inpcb *inp; 583 int error; 584 585 inp = so->so_pcb; 586 if (inp != NULL) { 587 error = EINVAL; 588 goto out; 589 } 590 591 if (so->so_snd.ssb_hiwat == 0 || so->so_rcv.ssb_hiwat == 0) { 592 error = soreserve(so, udp_sendspace, udp_recvspace, 593 ai->sb_rlimit); 594 if (error) 595 goto out; 596 } 597 598 error = in_pcballoc(so, &udbinfo[0]); 599 if (error) 600 goto out; 601 602 inp = (struct inpcb *)so->so_pcb; 603 inp->inp_vflag |= INP_IPV6; 604 if (!ip6_v6only) 605 inp->inp_vflag |= INP_IPV4; 606 inp->in6p_hops = -1; /* use kernel default */ 607 inp->in6p_cksum = -1; /* just to be sure */ 608 /* 609 * XXX: ugly!! 610 * IPv4 TTL initialization is necessary for an IPv6 socket as well, 611 * because the socket may be bound to an IPv6 wildcard address, 612 * which may match an IPv4-mapped IPv6 address. 613 */ 614 inp->inp_ip_ttl = ip_defttl; 615 error = 0; 616 out: 617 lwkt_replymsg(&msg->attach.base.lmsg, error); 618 } 619 620 static void 621 udp6_bind(netmsg_t msg) 622 { 623 struct socket *so =msg->bind.base.nm_so; 624 struct sockaddr *nam = msg->bind.nm_nam; 625 struct thread *td = msg->bind.nm_td; 626 struct sockaddr_in6 *sin6_p = (struct sockaddr_in6 *)nam; 627 struct inpcb *inp; 628 int error; 629 630 inp = so->so_pcb; 631 if (inp == NULL) { 632 error = EINVAL; 633 goto out; 634 } 635 636 inp->inp_vflag &= ~INP_IPV4; 637 inp->inp_vflag |= INP_IPV6; 638 if (!(inp->inp_flags & IN6P_IPV6_V6ONLY)) { 639 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) 640 inp->inp_vflag |= INP_IPV4; 641 else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 642 struct sockaddr_in sin; 643 644 in6_sin6_2_sin(&sin, sin6_p); 645 inp->inp_vflag |= INP_IPV4; 646 inp->inp_vflag &= ~INP_IPV6; 647 crit_enter(); 648 error = in_pcbbind(inp, (struct sockaddr *)&sin, td); 649 crit_exit(); 650 goto out; 651 } 652 } 653 654 crit_enter(); 655 error = in6_pcbbind(inp, nam, td); 656 crit_exit(); 657 if (error == 0) { 658 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) 659 inp->inp_flags |= INP_WASBOUND_NOTANY; 660 in_pcbinswildcardhash(inp); 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 inp = so->so_pcb; 676 if (inp == NULL) { 677 error = EINVAL; 678 goto out; 679 } 680 681 if (!(inp->inp_flags & IN6P_IPV6_V6ONLY)) { 682 struct sockaddr_in6 *sin6_p; 683 684 sin6_p = (struct sockaddr_in6 *)nam; 685 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 686 struct sockaddr_in sin; 687 688 if (inp->inp_faddr.s_addr != INADDR_ANY) { 689 error = EISCONN; 690 goto out; 691 } 692 in6_sin6_2_sin(&sin, sin6_p); 693 crit_enter(); 694 if (inp->inp_flags & INP_WILDCARD) 695 in_pcbremwildcardhash(inp); 696 error = in_pcbconnect(inp, (struct sockaddr *)&sin, td); 697 crit_exit(); 698 if (error == 0) { 699 inp->inp_vflag |= INP_IPV4; 700 inp->inp_vflag &= ~INP_IPV6; 701 soisconnected(so); 702 } 703 goto out; 704 } 705 } 706 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 707 error = EISCONN; 708 goto out; 709 } 710 if (inp->inp_flags & INP_WILDCARD) 711 in_pcbremwildcardhash(inp); 712 if (!prison_remote_ip(td, nam)) { 713 error = EAFNOSUPPORT; /* IPv4 only jail */ 714 goto out; 715 } 716 crit_enter(); 717 error = in6_pcbconnect(inp, nam, td); 718 crit_exit(); 719 if (error == 0) { 720 if (!ip6_v6only) { /* should be non mapped addr */ 721 inp->inp_vflag &= ~INP_IPV4; 722 inp->inp_vflag |= INP_IPV6; 723 } 724 soisconnected(so); 725 } else if (error == EAFNOSUPPORT) { /* connection dissolved */ 726 /* 727 * Follow traditional BSD behavior and retain 728 * the local port binding. But, fix the old misbehavior 729 * of overwriting any previously bound local address. 730 */ 731 if (!(inp->inp_flags & INP_WASBOUND_NOTANY)) 732 inp->in6p_laddr = kin6addr_any; 733 in_pcbinswildcardhash(inp); 734 } 735 out: 736 lwkt_replymsg(&msg->connect.base.lmsg, error); 737 } 738 739 static void 740 udp6_detach(netmsg_t msg) 741 { 742 struct socket *so = msg->detach.base.nm_so; 743 struct inpcb *inp; 744 int error; 745 746 inp = so->so_pcb; 747 if (inp) { 748 in6_pcbdetach(inp); 749 error = 0; 750 } else { 751 error = EINVAL; 752 } 753 lwkt_replymsg(&msg->detach.base.lmsg, error); 754 } 755 756 static void 757 udp6_disconnect(netmsg_t msg) 758 { 759 struct socket *so = msg->disconnect.base.nm_so; 760 struct inpcb *inp; 761 int error; 762 763 inp = so->so_pcb; 764 if (inp == NULL) { 765 error = EINVAL; 766 goto out; 767 } 768 769 if (inp->inp_vflag & INP_IPV4) { 770 const struct pr_usrreqs *pru; 771 772 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs; 773 pru->pru_disconnect(msg); /* XXX on right port? */ 774 return; 775 } 776 777 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 778 error = ENOTCONN; 779 } else { 780 in6_pcbdisconnect(inp); 781 soclrstate(so, SS_ISCONNECTED); /* XXX */ 782 error = 0; 783 } 784 out: 785 lwkt_replymsg(&msg->disconnect.base.lmsg, error); 786 } 787 788 static void 789 udp6_send(netmsg_t msg) 790 { 791 struct socket *so = msg->send.base.nm_so; 792 struct mbuf *m = msg->send.nm_m; 793 struct sockaddr *addr = msg->send.nm_addr; 794 struct mbuf *control = msg->send.nm_control; 795 struct thread *td = msg->send.nm_td; 796 struct inpcb *inp; 797 int error = 0; 798 799 inp = so->so_pcb; 800 if (inp == NULL) { 801 error = EINVAL; 802 goto bad; 803 } 804 805 if (addr) { 806 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 807 error = EINVAL; 808 goto bad; 809 } 810 if (addr->sa_family != AF_INET6) { 811 error = EAFNOSUPPORT; 812 goto bad; 813 } 814 } 815 816 if (!ip6_v6only) { 817 int hasv4addr; 818 struct sockaddr_in6 *sin6 = NULL; 819 820 if (addr == NULL) 821 hasv4addr = (inp->inp_vflag & INP_IPV4); 822 else { 823 sin6 = (struct sockaddr_in6 *)addr; 824 hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) 825 ? 1 : 0; 826 } 827 if (hasv4addr) { 828 const struct pr_usrreqs *pru; 829 830 if (sin6) 831 in6_sin6_2_sin_in_sock(addr); 832 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs; 833 pru->pru_send(msg); 834 /* msg invalid now */ 835 return; 836 } 837 } 838 839 error = udp6_output(inp, m, addr, control, td); 840 lwkt_replymsg(&msg->send.base.lmsg, error); 841 return; 842 bad: 843 m_freem(m); 844 lwkt_replymsg(&msg->send.base.lmsg, error); 845 } 846 847 struct pr_usrreqs udp6_usrreqs = { 848 .pru_abort = udp6_abort, 849 .pru_accept = pr_generic_notsupp, 850 .pru_attach = udp6_attach, 851 .pru_bind = udp6_bind, 852 .pru_connect = udp6_connect, 853 .pru_connect2 = pr_generic_notsupp, 854 .pru_control = in6_control_dispatch, 855 .pru_detach = udp6_detach, 856 .pru_disconnect = udp6_disconnect, 857 .pru_listen = pr_generic_notsupp, 858 .pru_peeraddr = in6_mapped_peeraddr_dispatch, 859 .pru_rcvd = pr_generic_notsupp, 860 .pru_rcvoob = pr_generic_notsupp, 861 .pru_send = udp6_send, 862 .pru_sense = pru_sense_null, 863 .pru_shutdown = udp_shutdown, 864 .pru_sockaddr = in6_mapped_sockaddr_dispatch, 865 .pru_sosend = sosend, 866 .pru_soreceive = soreceive 867 }; 868 869