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 67 #include <sys/param.h> 68 #include <sys/kernel.h> 69 #include <sys/mbuf.h> 70 #include <sys/protosw.h> 71 #include <sys/socket.h> 72 #include <sys/socketvar.h> 73 #include <sys/sysctl.h> 74 #include <sys/errno.h> 75 #include <sys/stat.h> 76 #include <sys/systm.h> 77 #include <sys/syslog.h> 78 #include <sys/proc.h> 79 #include <sys/priv.h> 80 81 #include <sys/thread2.h> 82 #include <sys/socketvar2.h> 83 #include <sys/msgport2.h> 84 85 #include <net/if.h> 86 #include <net/route.h> 87 #include <net/if_types.h> 88 #include <net/netisr2.h> 89 90 #include <netinet/in.h> 91 #include <netinet/in_systm.h> 92 #include <netinet/ip.h> 93 #include <netinet/in_pcb.h> 94 #include <netinet/in_var.h> 95 #include <netinet/ip_var.h> 96 #include <netinet/udp.h> 97 #include <netinet/udp_var.h> 98 #include <netinet/ip6.h> 99 #include <netinet6/ip6_var.h> 100 #include <netinet6/in6_pcb.h> 101 #include <netinet/icmp6.h> 102 #include <netinet6/udp6_var.h> 103 #include <netinet6/ip6protosw.h> 104 105 /* 106 * UDP protocol inplementation. 107 * Per RFC 768, August, 1980. 108 */ 109 110 extern struct protosw inetsw[]; 111 static int in6_mcmatch (struct inpcb *, struct in6_addr *, struct ifnet *); 112 113 static int 114 in6_mcmatch(struct inpcb *in6p, struct in6_addr *ia6, struct ifnet *ifp) 115 { 116 struct ip6_moptions *im6o = in6p->in6p_moptions; 117 struct in6_multi_mship *imm; 118 119 if (im6o == NULL) 120 return 0; 121 122 for (imm = im6o->im6o_memberships.lh_first; imm != NULL; 123 imm = imm->i6mm_chain.le_next) { 124 if ((ifp == NULL || 125 imm->i6mm_maddr->in6m_ifp == ifp) && 126 IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr, 127 ia6)) 128 return 1; 129 } 130 return 0; 131 } 132 133 int 134 udp6_input(struct mbuf **mp, int *offp, int proto) 135 { 136 struct mbuf *m = *mp; 137 struct ip6_hdr *ip6; 138 struct udphdr *uh; 139 struct inpcb *in6p; 140 struct mbuf *opts = NULL; 141 int off = *offp; 142 int plen, ulen; 143 struct sockaddr_in6 udp_in6; 144 struct socket *so; 145 struct inpcbinfo *pcbinfo = &udbinfo[0]; 146 147 IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE); 148 149 ip6 = mtod(m, struct ip6_hdr *); 150 151 udp_stat.udps_ipackets++; 152 153 plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6); 154 uh = (struct udphdr *)((caddr_t)ip6 + off); 155 ulen = ntohs((u_short)uh->uh_ulen); 156 157 if (plen != ulen) { 158 udp_stat.udps_badlen++; 159 goto bad; 160 } 161 162 /* 163 * Checksum extended UDP header and data. 164 */ 165 if (uh->uh_sum == 0) 166 udp_stat.udps_nosum++; 167 else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) { 168 udp_stat.udps_badsum++; 169 goto bad; 170 } 171 172 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 173 struct inpcb *last, *marker; 174 175 /* 176 * Deliver a multicast datagram to all sockets 177 * for which the local and remote addresses and ports match 178 * those of the incoming datagram. This allows more than 179 * one process to receive multicasts on the same port. 180 * (This really ought to be done for unicast datagrams as 181 * well, but that would cause problems with existing 182 * applications that open both address-specific sockets and 183 * a wildcard socket listening to the same port -- they would 184 * end up receiving duplicates of every unicast datagram. 185 * Those applications open the multiple sockets to overcome an 186 * inadequacy of the UDP socket interface, but for backwards 187 * compatibility we avoid the problem here rather than 188 * fixing the interface. Maybe 4.5BSD will remedy this?) 189 */ 190 191 /* 192 * In a case that laddr should be set to the link-local 193 * address (this happens in RIPng), the multicast address 194 * specified in the received packet does not match with 195 * laddr. To cure this situation, the matching is relaxed 196 * if the receiving interface is the same as one specified 197 * in the socket and if the destination multicast address 198 * matches one of the multicast groups specified in the socket. 199 */ 200 201 /* 202 * Construct sockaddr format source address. 203 */ 204 init_sin6(&udp_in6, m); /* general init */ 205 udp_in6.sin6_port = uh->uh_sport; 206 /* 207 * KAME note: traditionally we dropped udpiphdr from mbuf here. 208 */ 209 210 /* 211 * Locate pcb(s) for datagram. 212 * (Algorithm copied from raw_intr().) 213 */ 214 last = NULL; 215 216 marker = in_pcbmarker(); 217 218 GET_PCBINFO_TOKEN(pcbinfo); 219 220 LIST_INSERT_HEAD(&pcbinfo->pcblisthead, marker, inp_list); 221 while ((in6p = LIST_NEXT(marker, inp_list)) != NULL) { 222 LIST_REMOVE(marker, inp_list); 223 LIST_INSERT_AFTER(in6p, marker, inp_list); 224 225 if (in6p->inp_flags & INP_PLACEMARKER) 226 continue; 227 if (!INP_ISIPV6(in6p)) 228 continue; 229 if (in6p->in6p_lport != uh->uh_dport) 230 continue; 231 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { 232 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, 233 &ip6->ip6_dst) && 234 !in6_mcmatch(in6p, &ip6->ip6_dst, 235 m->m_pkthdr.rcvif)) 236 continue; 237 } 238 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 239 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, 240 &ip6->ip6_src) || 241 in6p->in6p_fport != uh->uh_sport) 242 continue; 243 } 244 245 if (last != NULL) { 246 struct mbuf *n; 247 248 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { 249 /* 250 * KAME NOTE: do not 251 * m_copy(m, offset, ...) above. 252 * ssb_appendaddr() expects M_PKTHDR, 253 * and m_copy() will copy M_PKTHDR 254 * only if offset is 0. 255 */ 256 so = last->in6p_socket; 257 if ((last->in6p_flags & IN6P_CONTROLOPTS) || 258 (so->so_options & SO_TIMESTAMP)) { 259 ip6_savecontrol(last, &opts, 260 ip6, n); 261 } 262 m_adj(n, off + sizeof(struct udphdr)); 263 lwkt_gettoken(&so->so_rcv.ssb_token); 264 if (ssb_appendaddr(&so->so_rcv, 265 (struct sockaddr *)&udp_in6, 266 n, opts) == 0) { 267 m_freem(n); 268 if (opts) 269 m_freem(opts); 270 udp_stat.udps_fullsock++; 271 } else { 272 sorwakeup(so); 273 } 274 lwkt_reltoken(&so->so_rcv.ssb_token); 275 opts = NULL; 276 } 277 } 278 last = in6p; 279 /* 280 * Don't look for additional matches if this one does 281 * not have either the SO_REUSEPORT or SO_REUSEADDR 282 * socket options set. This heuristic avoids searching 283 * through all pcbs in the common case of a non-shared 284 * port. It assumes that an application will never 285 * clear these options after setting them. 286 */ 287 if ((last->in6p_socket->so_options & 288 (SO_REUSEPORT | SO_REUSEADDR)) == 0) 289 break; 290 } 291 LIST_REMOVE(marker, inp_list); 292 293 REL_PCBINFO_TOKEN(pcbinfo); 294 295 if (last == NULL) { 296 /* 297 * No matching pcb found; discard datagram. 298 * (No need to send an ICMP Port Unreachable 299 * for a broadcast or multicast datgram.) 300 */ 301 udp_stat.udps_noport++; 302 udp_stat.udps_noportmcast++; 303 goto bad; 304 } 305 if (last->in6p_flags & IN6P_CONTROLOPTS 306 || last->in6p_socket->so_options & SO_TIMESTAMP) 307 ip6_savecontrol(last, &opts, ip6, m); 308 309 m_adj(m, off + sizeof(struct udphdr)); 310 so = last->in6p_socket; 311 lwkt_gettoken(&so->so_rcv.ssb_token); 312 if (ssb_appendaddr(&so->so_rcv, (struct sockaddr *)&udp_in6, 313 m, opts) == 0) { 314 udp_stat.udps_fullsock++; 315 lwkt_reltoken(&so->so_rcv.ssb_token); 316 goto bad; 317 } 318 sorwakeup(so); 319 lwkt_reltoken(&so->so_rcv.ssb_token); 320 return IPPROTO_DONE; 321 } 322 /* 323 * Locate pcb for datagram. 324 */ 325 in6p = in6_pcblookup_hash(pcbinfo, &ip6->ip6_src, uh->uh_sport, 326 &ip6->ip6_dst, uh->uh_dport, 1, 327 m->m_pkthdr.rcvif); 328 if (in6p == NULL) { 329 if (log_in_vain) { 330 char buf[INET6_ADDRSTRLEN]; 331 332 strcpy(buf, ip6_sprintf(&ip6->ip6_dst)); 333 log(LOG_INFO, 334 "Connection attempt to UDP [%s]:%d from [%s]:%d\n", 335 buf, ntohs(uh->uh_dport), 336 ip6_sprintf(&ip6->ip6_src), ntohs(uh->uh_sport)); 337 } 338 udp_stat.udps_noport++; 339 if (m->m_flags & M_MCAST) { 340 kprintf("UDP6: M_MCAST is set in a unicast packet.\n"); 341 udp_stat.udps_noportmcast++; 342 goto bad; 343 } 344 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0); 345 return IPPROTO_DONE; 346 } 347 348 /* 349 * Construct sockaddr format source address. 350 * Stuff source address and datagram in user buffer. 351 */ 352 init_sin6(&udp_in6, m); /* general init */ 353 udp_in6.sin6_port = uh->uh_sport; 354 if (in6p->in6p_flags & IN6P_CONTROLOPTS 355 || in6p->in6p_socket->so_options & SO_TIMESTAMP) 356 ip6_savecontrol(in6p, &opts, ip6, m); 357 m_adj(m, off + sizeof(struct udphdr)); 358 so = in6p->in6p_socket; 359 lwkt_gettoken(&so->so_rcv.ssb_token); 360 if (ssb_appendaddr(&so->so_rcv, (struct sockaddr *)&udp_in6, 361 m, opts) == 0) { 362 udp_stat.udps_fullsock++; 363 lwkt_reltoken(&so->so_rcv.ssb_token); 364 goto bad; 365 } 366 sorwakeup(so); 367 lwkt_reltoken(&so->so_rcv.ssb_token); 368 return IPPROTO_DONE; 369 bad: 370 if (m) 371 m_freem(m); 372 if (opts) 373 m_freem(opts); 374 return IPPROTO_DONE; 375 } 376 377 void 378 udp6_ctlinput(netmsg_t msg) 379 { 380 int cmd = msg->ctlinput.nm_cmd; 381 struct sockaddr *sa = msg->ctlinput.nm_arg; 382 void *d = msg->ctlinput.nm_extra; 383 struct udphdr uh; 384 struct ip6_hdr *ip6; 385 struct mbuf *m; 386 int off = 0; 387 struct ip6ctlparam *ip6cp = NULL; 388 const struct sockaddr_in6 *sa6_src = NULL; 389 inp_notify_t notify = udp_notify; 390 struct udp_portonly { 391 u_int16_t uh_sport; 392 u_int16_t uh_dport; 393 } *uhp; 394 395 if (sa->sa_family != AF_INET6 || 396 sa->sa_len != sizeof(struct sockaddr_in6)) 397 goto out; 398 399 if ((unsigned)cmd >= PRC_NCMDS) 400 goto out; 401 if (PRC_IS_REDIRECT(cmd)) 402 notify = in6_rtchange, d = NULL; 403 else if (cmd == PRC_HOSTDEAD) 404 d = NULL; 405 else if (inet6ctlerrmap[cmd] == 0) 406 goto out; 407 408 /* if the parameter is from icmp6, decode it. */ 409 if (d != NULL) { 410 ip6cp = (struct ip6ctlparam *)d; 411 m = ip6cp->ip6c_m; 412 ip6 = ip6cp->ip6c_ip6; 413 off = ip6cp->ip6c_off; 414 sa6_src = ip6cp->ip6c_src; 415 } else { 416 m = NULL; 417 ip6 = NULL; 418 sa6_src = &sa6_any; 419 } 420 421 if (ip6) { 422 /* 423 * XXX: We assume that when IPV6 is non NULL, 424 * M and OFF are valid. 425 */ 426 427 /* check if we can safely examine src and dst ports */ 428 if (m->m_pkthdr.len < off + sizeof(*uhp)) 429 return; 430 431 bzero(&uh, sizeof(uh)); 432 m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh); 433 434 in6_pcbnotify(&udbinfo[0], sa, uh.uh_dport, 435 (struct sockaddr *)ip6cp->ip6c_src, uh.uh_sport, 436 cmd, 0, notify); 437 } else { 438 in6_pcbnotify(&udbinfo[0], sa, 0, 439 (const struct sockaddr *)sa6_src, 0, 440 cmd, 0, notify); 441 } 442 out: 443 lwkt_replymsg(&msg->ctlinput.base.lmsg, 0); 444 } 445 446 static int 447 udp6_getcred(SYSCTL_HANDLER_ARGS) 448 { 449 struct sockaddr_in6 addrs[2]; 450 struct inpcb *inp; 451 int error; 452 453 error = priv_check(req->td, PRIV_ROOT); 454 if (error) 455 return (error); 456 457 if (req->newlen != sizeof(addrs)) 458 return (EINVAL); 459 if (req->oldlen != sizeof(struct ucred)) 460 return (EINVAL); 461 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 462 if (error) 463 return (error); 464 crit_enter(); 465 inp = in6_pcblookup_hash(&udbinfo[0], &addrs[1].sin6_addr, 466 addrs[1].sin6_port, 467 &addrs[0].sin6_addr, addrs[0].sin6_port, 468 1, NULL); 469 if (!inp || !inp->inp_socket) { 470 error = ENOENT; 471 goto out; 472 } 473 error = SYSCTL_OUT(req, inp->inp_socket->so_cred, 474 sizeof(struct ucred)); 475 476 out: 477 crit_exit(); 478 return (error); 479 } 480 481 SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW, 482 0, 0, 483 udp6_getcred, "S,ucred", "Get the ucred of a UDP6 connection"); 484 485 /* 486 * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort() 487 * will sofree() it when we return. 488 */ 489 static void 490 udp6_abort(netmsg_t msg) 491 { 492 struct socket *so = msg->abort.base.nm_so; 493 struct inpcb *inp; 494 int error; 495 496 inp = so->so_pcb; 497 if (inp) { 498 soisdisconnected(so); 499 500 in6_pcbdetach(inp); 501 error = 0; 502 } else { 503 error = EINVAL; 504 } 505 lwkt_replymsg(&msg->abort.base.lmsg, error); 506 } 507 508 static void 509 udp6_attach(netmsg_t msg) 510 { 511 struct socket *so = msg->attach.base.nm_so; 512 struct pru_attach_info *ai = msg->attach.nm_ai; 513 struct inpcb *inp; 514 int error; 515 516 inp = so->so_pcb; 517 if (inp != NULL) { 518 error = EINVAL; 519 goto out; 520 } 521 522 if (so->so_snd.ssb_hiwat == 0 || so->so_rcv.ssb_hiwat == 0) { 523 error = soreserve(so, udp_sendspace, udp_recvspace, 524 ai->sb_rlimit); 525 if (error) 526 goto out; 527 } 528 529 error = in_pcballoc(so, &udbinfo[0]); 530 if (error) 531 goto out; 532 533 inp = (struct inpcb *)so->so_pcb; 534 inp->in6p_hops = -1; /* use kernel default */ 535 inp->in6p_cksum = -1; /* just to be sure */ 536 /* 537 * XXX: ugly!! 538 * IPv4 TTL initialization is necessary for an IPv6 socket as well, 539 * because the socket may be bound to an IPv6 wildcard address, 540 * which may match an IPv4-mapped IPv6 address. 541 */ 542 inp->inp_ip_ttl = ip_defttl; 543 error = 0; 544 out: 545 lwkt_replymsg(&msg->attach.base.lmsg, error); 546 } 547 548 static void 549 udp6_bind(netmsg_t msg) 550 { 551 struct socket *so =msg->bind.base.nm_so; 552 struct sockaddr *nam = msg->bind.nm_nam; 553 struct thread *td = msg->bind.nm_td; 554 struct sockaddr_in6 *sin6_p = (struct sockaddr_in6 *)nam; 555 struct inpcb *inp; 556 int error; 557 558 inp = so->so_pcb; 559 if (inp == NULL) { 560 error = EINVAL; 561 goto out; 562 } 563 564 error = in6_pcbbind(inp, nam, td); 565 if (error == 0) { 566 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) 567 inp->inp_flags |= INP_WASBOUND_NOTANY; 568 in_pcbinswildcardhash(inp); 569 } 570 out: 571 lwkt_replymsg(&msg->bind.base.lmsg, error); 572 } 573 574 static void 575 udp6_connect(netmsg_t msg) 576 { 577 struct socket *so = msg->connect.base.nm_so; 578 struct sockaddr *nam = msg->connect.nm_nam; 579 struct thread *td = msg->connect.nm_td; 580 struct sockaddr_in6 *sin6_p; 581 struct inpcb *inp; 582 int error; 583 584 inp = so->so_pcb; 585 if (inp == NULL) { 586 error = EINVAL; 587 goto out; 588 } 589 590 sin6_p = (struct sockaddr_in6 *)nam; 591 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 592 error = EADDRNOTAVAIL; 593 goto out; 594 } 595 596 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 597 error = EISCONN; 598 goto out; 599 } 600 if (inp->inp_flags & INP_WILDCARD) 601 in_pcbremwildcardhash(inp); 602 if (!prison_remote_ip(td, nam)) { 603 error = EAFNOSUPPORT; /* IPv4 only jail */ 604 goto out; 605 } 606 error = in6_pcbconnect(inp, nam, td); 607 if (error == 0) { 608 soisconnected(so); 609 } else if (error == EAFNOSUPPORT) { /* connection dissolved */ 610 /* 611 * Follow traditional BSD behavior and retain 612 * the local port binding. But, fix the old misbehavior 613 * of overwriting any previously bound local address. 614 */ 615 if (!(inp->inp_flags & INP_WASBOUND_NOTANY)) 616 inp->in6p_laddr = kin6addr_any; 617 in_pcbinswildcardhash(inp); 618 } 619 out: 620 lwkt_replymsg(&msg->connect.base.lmsg, error); 621 } 622 623 static void 624 udp6_detach(netmsg_t msg) 625 { 626 struct socket *so = msg->detach.base.nm_so; 627 struct inpcb *inp; 628 int error; 629 630 inp = so->so_pcb; 631 if (inp) { 632 in6_pcbdetach(inp); 633 error = 0; 634 } else { 635 error = EINVAL; 636 } 637 lwkt_replymsg(&msg->detach.base.lmsg, error); 638 } 639 640 static void 641 udp6_disconnect(netmsg_t msg) 642 { 643 struct socket *so = msg->disconnect.base.nm_so; 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 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 654 error = ENOTCONN; 655 } else { 656 in6_pcbdisconnect(inp); 657 soclrstate(so, SS_ISCONNECTED); /* XXX */ 658 error = 0; 659 } 660 out: 661 lwkt_replymsg(&msg->disconnect.base.lmsg, error); 662 } 663 664 static void 665 udp6_send(netmsg_t msg) 666 { 667 struct socket *so = msg->send.base.nm_so; 668 struct mbuf *m = msg->send.nm_m; 669 struct sockaddr *addr = msg->send.nm_addr; 670 struct mbuf *control = msg->send.nm_control; 671 struct thread *td = msg->send.nm_td; 672 struct inpcb *inp; 673 int error = 0; 674 675 inp = so->so_pcb; 676 if (inp == NULL) { 677 error = EINVAL; 678 goto bad; 679 } 680 681 if (addr) { 682 struct sockaddr_in6 *sin6; 683 684 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 685 error = EINVAL; 686 goto bad; 687 } 688 if (addr->sa_family != AF_INET6) { 689 error = EAFNOSUPPORT; 690 goto bad; 691 } 692 693 sin6 = (struct sockaddr_in6 *)addr; 694 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 695 error = EADDRNOTAVAIL; 696 goto bad; 697 } 698 } 699 700 error = udp6_output(inp, m, addr, control, td); 701 lwkt_replymsg(&msg->send.base.lmsg, error); 702 return; 703 bad: 704 m_freem(m); 705 lwkt_replymsg(&msg->send.base.lmsg, error); 706 } 707 708 struct pr_usrreqs udp6_usrreqs = { 709 .pru_abort = udp6_abort, 710 .pru_accept = pr_generic_notsupp, 711 .pru_attach = udp6_attach, 712 .pru_bind = udp6_bind, 713 .pru_connect = udp6_connect, 714 .pru_connect2 = pr_generic_notsupp, 715 .pru_control = in6_control_dispatch, 716 .pru_detach = udp6_detach, 717 .pru_disconnect = udp6_disconnect, 718 .pru_listen = pr_generic_notsupp, 719 .pru_peeraddr = in6_setpeeraddr_dispatch, 720 .pru_rcvd = pr_generic_notsupp, 721 .pru_rcvoob = pr_generic_notsupp, 722 .pru_send = udp6_send, 723 .pru_sense = pru_sense_null, 724 .pru_shutdown = udp_shutdown, 725 .pru_sockaddr = in6_setsockaddr_dispatch, 726 .pru_sosend = sosend, 727 .pru_soreceive = soreceive 728 }; 729 730