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/malloc.h> /* for M_NOWAIT, XXX legacy m_copy() */ 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/caps.h> 81 #include <sys/jail.h> 82 83 #include <sys/thread2.h> 84 #include <sys/socketvar2.h> 85 #include <sys/msgport2.h> 86 87 #include <net/if.h> 88 #include <net/route.h> 89 #include <net/if_types.h> 90 #include <net/netisr2.h> 91 92 #include <netinet/in.h> 93 #include <netinet/in_systm.h> 94 #include <netinet/ip.h> 95 #include <netinet/in_pcb.h> 96 #include <netinet/in_var.h> 97 #include <netinet/ip_var.h> 98 #include <netinet/udp.h> 99 #include <netinet/udp_var.h> 100 #include <netinet/ip6.h> 101 #include <netinet6/ip6_var.h> 102 #include <netinet6/in6_pcb.h> 103 #include <netinet/icmp6.h> 104 #include <netinet6/udp6_var.h> 105 #include <netinet6/ip6protosw.h> 106 107 /* 108 * UDP protocol inplementation. 109 * Per RFC 768, August, 1980. 110 */ 111 112 extern struct protosw inetsw[]; 113 static int in6_mcmatch (struct inpcb *, struct in6_addr *, struct ifnet *); 114 115 static int 116 in6_mcmatch(struct inpcb *in6p, struct in6_addr *ia6, struct ifnet *ifp) 117 { 118 struct ip6_moptions *im6o = in6p->in6p_moptions; 119 struct in6_multi_mship *imm; 120 121 if (im6o == NULL) 122 return 0; 123 124 for (imm = im6o->im6o_memberships.lh_first; imm != NULL; 125 imm = imm->i6mm_chain.le_next) { 126 if ((ifp == NULL || 127 imm->i6mm_maddr->in6m_ifp == ifp) && 128 IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr, 129 ia6)) 130 return 1; 131 } 132 return 0; 133 } 134 135 int 136 udp6_input(struct mbuf **mp, int *offp, int proto) 137 { 138 struct mbuf *m = *mp; 139 struct ip6_hdr *ip6; 140 struct udphdr *uh; 141 struct inpcb *in6p; 142 struct mbuf *opts = NULL; 143 int off = *offp; 144 int plen, ulen; 145 struct sockaddr_in6 udp_in6; 146 struct socket *so; 147 struct inpcbinfo *pcbinfo = &udbinfo[0]; 148 149 IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE); 150 151 ip6 = mtod(m, struct ip6_hdr *); 152 153 udp_stat.udps_ipackets++; 154 155 plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6); 156 uh = (struct udphdr *)((caddr_t)ip6 + off); 157 ulen = ntohs((u_short)uh->uh_ulen); 158 159 if (plen != ulen) { 160 udp_stat.udps_badlen++; 161 goto bad; 162 } 163 164 /* 165 * Checksum extended UDP header and data. 166 */ 167 if (uh->uh_sum == 0) 168 udp_stat.udps_nosum++; 169 else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) { 170 udp_stat.udps_badsum++; 171 goto bad; 172 } 173 174 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 175 struct inpcb *last, *marker; 176 177 /* 178 * Deliver a multicast datagram to all sockets 179 * for which the local and remote addresses and ports match 180 * those of the incoming datagram. This allows more than 181 * one process to receive multicasts on the same port. 182 * (This really ought to be done for unicast datagrams as 183 * well, but that would cause problems with existing 184 * applications that open both address-specific sockets and 185 * a wildcard socket listening to the same port -- they would 186 * end up receiving duplicates of every unicast datagram. 187 * Those applications open the multiple sockets to overcome an 188 * inadequacy of the UDP socket interface, but for backwards 189 * compatibility we avoid the problem here rather than 190 * fixing the interface. Maybe 4.5BSD will remedy this?) 191 */ 192 193 /* 194 * In a case that laddr should be set to the link-local 195 * address (this happens in RIPng), the multicast address 196 * specified in the received packet does not match with 197 * laddr. To cure this situation, the matching is relaxed 198 * if the receiving interface is the same as one specified 199 * in the socket and if the destination multicast address 200 * matches one of the multicast groups specified in the socket. 201 */ 202 203 /* 204 * Construct sockaddr format source address. 205 */ 206 init_sin6(&udp_in6, m); /* general init */ 207 udp_in6.sin6_port = uh->uh_sport; 208 /* 209 * KAME note: traditionally we dropped udpiphdr from mbuf here. 210 */ 211 212 /* 213 * Locate pcb(s) for datagram. 214 * (Algorithm copied from raw_intr().) 215 */ 216 last = NULL; 217 218 marker = in_pcbmarker(); 219 220 GET_PCBINFO_TOKEN(pcbinfo); 221 222 LIST_INSERT_HEAD(&pcbinfo->pcblisthead, marker, inp_list); 223 while ((in6p = LIST_NEXT(marker, inp_list)) != NULL) { 224 LIST_REMOVE(marker, inp_list); 225 LIST_INSERT_AFTER(in6p, marker, inp_list); 226 227 if (in6p->inp_flags & INP_PLACEMARKER) 228 continue; 229 if (!INP_ISIPV6(in6p)) 230 continue; 231 if (in6p->in6p_lport != uh->uh_dport) 232 continue; 233 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { 234 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, 235 &ip6->ip6_dst) && 236 !in6_mcmatch(in6p, &ip6->ip6_dst, 237 m->m_pkthdr.rcvif)) 238 continue; 239 } 240 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 241 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, 242 &ip6->ip6_src) || 243 in6p->in6p_fport != uh->uh_sport) 244 continue; 245 } 246 247 if (last != NULL) { 248 struct mbuf *n; 249 250 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { 251 /* 252 * KAME NOTE: do not 253 * m_copy(m, offset, ...) above. 254 * ssb_appendaddr() expects M_PKTHDR, 255 * and m_copy() will copy M_PKTHDR 256 * only if offset is 0. 257 */ 258 so = last->in6p_socket; 259 if ((last->in6p_flags & IN6P_CONTROLOPTS) || 260 (so->so_options & SO_TIMESTAMP)) { 261 ip6_savecontrol(last, &opts, 262 ip6, n); 263 } 264 m_adj(n, off + sizeof(struct udphdr)); 265 lwkt_gettoken(&so->so_rcv.ssb_token); 266 if (ssb_appendaddr(&so->so_rcv, 267 (struct sockaddr *)&udp_in6, 268 n, opts) == 0) { 269 m_freem(n); 270 if (opts) 271 m_freem(opts); 272 udp_stat.udps_fullsock++; 273 soroverflow(so); 274 } else { 275 sorwakeup(so); 276 } 277 lwkt_reltoken(&so->so_rcv.ssb_token); 278 opts = NULL; 279 } 280 } 281 last = in6p; 282 /* 283 * Don't look for additional matches if this one does 284 * not have either the SO_REUSEPORT or SO_REUSEADDR 285 * socket options set. This heuristic avoids searching 286 * through all pcbs in the common case of a non-shared 287 * port. It assumes that an application will never 288 * clear these options after setting them. 289 */ 290 if ((last->in6p_socket->so_options & 291 (SO_REUSEPORT | SO_REUSEADDR)) == 0) 292 break; 293 } 294 LIST_REMOVE(marker, inp_list); 295 296 REL_PCBINFO_TOKEN(pcbinfo); 297 298 if (last == NULL) { 299 /* 300 * No matching pcb found; discard datagram. 301 * (No need to send an ICMP Port Unreachable 302 * for a broadcast or multicast datgram.) 303 */ 304 udp_stat.udps_noport++; 305 udp_stat.udps_noportmcast++; 306 goto bad; 307 } 308 if (last->in6p_flags & IN6P_CONTROLOPTS 309 || last->in6p_socket->so_options & SO_TIMESTAMP) 310 ip6_savecontrol(last, &opts, ip6, m); 311 312 m_adj(m, off + sizeof(struct udphdr)); 313 so = last->in6p_socket; 314 lwkt_gettoken(&so->so_rcv.ssb_token); 315 if (ssb_appendaddr(&so->so_rcv, (struct sockaddr *)&udp_in6, 316 m, opts) == 0) { 317 udp_stat.udps_fullsock++; 318 soroverflow(so); 319 lwkt_reltoken(&so->so_rcv.ssb_token); 320 goto bad; 321 } 322 sorwakeup(so); 323 lwkt_reltoken(&so->so_rcv.ssb_token); 324 return IPPROTO_DONE; 325 } 326 /* 327 * Locate pcb for datagram. 328 */ 329 in6p = in6_pcblookup_hash(pcbinfo, &ip6->ip6_src, uh->uh_sport, 330 &ip6->ip6_dst, uh->uh_dport, 1, 331 m->m_pkthdr.rcvif); 332 if (in6p == NULL) { 333 if (log_in_vain) { 334 char buf[INET6_ADDRSTRLEN]; 335 336 strcpy(buf, ip6_sprintf(&ip6->ip6_dst)); 337 log(LOG_INFO, 338 "Connection attempt to UDP [%s]:%d from [%s]:%d\n", 339 buf, ntohs(uh->uh_dport), 340 ip6_sprintf(&ip6->ip6_src), ntohs(uh->uh_sport)); 341 } 342 udp_stat.udps_noport++; 343 if (m->m_flags & M_MCAST) { 344 kprintf("UDP6: M_MCAST is set in a unicast packet.\n"); 345 udp_stat.udps_noportmcast++; 346 goto bad; 347 } 348 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0); 349 return IPPROTO_DONE; 350 } 351 352 /* 353 * Construct sockaddr format source address. 354 * Stuff source address and datagram in user buffer. 355 */ 356 init_sin6(&udp_in6, m); /* general init */ 357 udp_in6.sin6_port = uh->uh_sport; 358 if (in6p->in6p_flags & IN6P_CONTROLOPTS 359 || in6p->in6p_socket->so_options & SO_TIMESTAMP) 360 ip6_savecontrol(in6p, &opts, ip6, m); 361 m_adj(m, off + sizeof(struct udphdr)); 362 so = in6p->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 soroverflow(so); 368 lwkt_reltoken(&so->so_rcv.ssb_token); 369 goto bad; 370 } 371 sorwakeup(so); 372 lwkt_reltoken(&so->so_rcv.ssb_token); 373 return IPPROTO_DONE; 374 bad: 375 if (m) 376 m_freem(m); 377 if (opts) 378 m_freem(opts); 379 return IPPROTO_DONE; 380 } 381 382 void 383 udp6_ctlinput(netmsg_t msg) 384 { 385 int cmd = msg->ctlinput.nm_cmd; 386 struct sockaddr *sa = msg->ctlinput.nm_arg; 387 void *d = msg->ctlinput.nm_extra; 388 struct udphdr uh; 389 struct ip6_hdr *ip6; 390 struct mbuf *m; 391 int off = 0; 392 struct ip6ctlparam *ip6cp = NULL; 393 const struct sockaddr_in6 *sa6_src = NULL; 394 inp_notify_t notify = udp_notify; 395 struct udp_portonly { 396 u_int16_t uh_sport; 397 u_int16_t uh_dport; 398 } *uhp; 399 400 if (sa->sa_family != AF_INET6 || 401 sa->sa_len != sizeof(struct sockaddr_in6)) 402 goto out; 403 404 if ((unsigned)cmd >= PRC_NCMDS) 405 goto out; 406 if (PRC_IS_REDIRECT(cmd)) 407 notify = in6_rtchange, d = NULL; 408 else if (cmd == PRC_HOSTDEAD) 409 d = NULL; 410 else if (inet6ctlerrmap[cmd] == 0) 411 goto out; 412 413 /* if the parameter is from icmp6, decode it. */ 414 if (d != NULL) { 415 ip6cp = (struct ip6ctlparam *)d; 416 m = ip6cp->ip6c_m; 417 ip6 = ip6cp->ip6c_ip6; 418 off = ip6cp->ip6c_off; 419 sa6_src = ip6cp->ip6c_src; 420 } else { 421 m = NULL; 422 ip6 = NULL; 423 sa6_src = &sa6_any; 424 } 425 426 if (ip6) { 427 /* 428 * XXX: We assume that when IPV6 is non NULL, 429 * M and OFF are valid. 430 */ 431 432 /* check if we can safely examine src and dst ports */ 433 if (m->m_pkthdr.len < off + sizeof(*uhp)) 434 return; 435 436 bzero(&uh, sizeof(uh)); 437 m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh); 438 439 in6_pcbnotify(&udbinfo[0], sa, uh.uh_dport, 440 (struct sockaddr *)ip6cp->ip6c_src, uh.uh_sport, 441 cmd, 0, notify); 442 } else { 443 in6_pcbnotify(&udbinfo[0], sa, 0, 444 (const struct sockaddr *)sa6_src, 0, 445 cmd, 0, notify); 446 } 447 out: 448 lwkt_replymsg(&msg->ctlinput.base.lmsg, 0); 449 } 450 451 static int 452 udp6_getcred(SYSCTL_HANDLER_ARGS) 453 { 454 struct sockaddr_in6 addrs[2]; 455 struct inpcb *inp; 456 int error; 457 458 error = caps_priv_check_td(req->td, SYSCAP_RESTRICTEDROOT); 459 if (error) 460 return (error); 461 462 if (req->newlen != sizeof(addrs)) 463 return (EINVAL); 464 if (req->oldlen != sizeof(struct ucred)) 465 return (EINVAL); 466 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 467 if (error) 468 return (error); 469 crit_enter(); 470 inp = in6_pcblookup_hash(&udbinfo[0], &addrs[1].sin6_addr, 471 addrs[1].sin6_port, 472 &addrs[0].sin6_addr, addrs[0].sin6_port, 473 1, NULL); 474 if (!inp || !inp->inp_socket) { 475 error = ENOENT; 476 goto out; 477 } 478 error = SYSCTL_OUT(req, inp->inp_socket->so_cred, 479 sizeof(struct ucred)); 480 481 out: 482 crit_exit(); 483 return (error); 484 } 485 486 SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW, 487 0, 0, 488 udp6_getcred, "S,ucred", "Get the ucred of a UDP6 connection"); 489 490 /* 491 * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort() 492 * will sofree() it when we return. 493 */ 494 static void 495 udp6_abort(netmsg_t msg) 496 { 497 struct socket *so = msg->abort.base.nm_so; 498 struct inpcb *inp; 499 int error; 500 501 inp = so->so_pcb; 502 if (inp) { 503 soisdisconnected(so); 504 505 in6_pcbdetach(inp); 506 error = 0; 507 } else { 508 error = EINVAL; 509 } 510 lwkt_replymsg(&msg->abort.base.lmsg, error); 511 } 512 513 static void 514 udp6_attach(netmsg_t msg) 515 { 516 struct socket *so = msg->attach.base.nm_so; 517 struct pru_attach_info *ai = msg->attach.nm_ai; 518 struct inpcb *inp; 519 int error; 520 521 inp = so->so_pcb; 522 if (inp != NULL) { 523 error = EINVAL; 524 goto out; 525 } 526 527 if (so->so_snd.ssb_hiwat == 0 || so->so_rcv.ssb_hiwat == 0) { 528 error = soreserve(so, udp_sendspace, udp_recvspace, 529 ai->sb_rlimit); 530 if (error) 531 goto out; 532 } 533 534 error = in_pcballoc(so, &udbinfo[0]); 535 if (error) 536 goto out; 537 538 inp = (struct inpcb *)so->so_pcb; 539 inp->in6p_hops = -1; /* use kernel default */ 540 inp->in6p_cksum = -1; /* just to be sure */ 541 /* 542 * XXX: ugly!! 543 * IPv4 TTL initialization is necessary for an IPv6 socket as well, 544 * because the socket may be bound to an IPv6 wildcard address, 545 * which may match an IPv4-mapped IPv6 address. 546 */ 547 inp->inp_ip_ttl = ip_defttl; 548 error = 0; 549 out: 550 lwkt_replymsg(&msg->attach.base.lmsg, error); 551 } 552 553 static void 554 udp6_bind(netmsg_t msg) 555 { 556 struct socket *so =msg->bind.base.nm_so; 557 struct sockaddr *nam = msg->bind.nm_nam; 558 struct thread *td = msg->bind.nm_td; 559 struct sockaddr_in6 *sin6_p = (struct sockaddr_in6 *)nam; 560 struct inpcb *inp; 561 int error; 562 563 inp = so->so_pcb; 564 if (inp == NULL) { 565 error = EINVAL; 566 goto out; 567 } 568 569 error = in6_pcbbind(inp, nam, td); 570 if (error == 0) { 571 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) 572 inp->inp_flags |= INP_WASBOUND_NOTANY; 573 in_pcbinswildcardhash(inp); 574 } 575 out: 576 lwkt_replymsg(&msg->bind.base.lmsg, error); 577 } 578 579 static void 580 udp6_connect(netmsg_t msg) 581 { 582 struct socket *so = msg->connect.base.nm_so; 583 struct sockaddr *nam = msg->connect.nm_nam; 584 struct thread *td = msg->connect.nm_td; 585 struct sockaddr_in6 *sin6_p; 586 struct inpcb *inp; 587 int error; 588 589 inp = so->so_pcb; 590 if (inp == NULL) { 591 error = EINVAL; 592 goto out; 593 } 594 595 sin6_p = (struct sockaddr_in6 *)nam; 596 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 597 error = EADDRNOTAVAIL; 598 goto out; 599 } 600 601 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 602 error = EISCONN; 603 goto out; 604 } 605 if (inp->inp_flags & INP_WILDCARD) 606 in_pcbremwildcardhash(inp); 607 error = in6_pcbconnect(inp, nam, td); 608 if (error == 0) { 609 soisconnected(so); 610 } else if (error == EAFNOSUPPORT) { /* connection dissolved */ 611 /* 612 * Follow traditional BSD behavior and retain 613 * the local port binding. But, fix the old misbehavior 614 * of overwriting any previously bound local address. 615 */ 616 if (!(inp->inp_flags & INP_WASBOUND_NOTANY)) 617 inp->in6p_laddr = kin6addr_any; 618 in_pcbinswildcardhash(inp); 619 } 620 out: 621 lwkt_replymsg(&msg->connect.base.lmsg, error); 622 } 623 624 static void 625 udp6_detach(netmsg_t msg) 626 { 627 struct socket *so = msg->detach.base.nm_so; 628 struct inpcb *inp; 629 int error; 630 631 inp = so->so_pcb; 632 if (inp) { 633 in6_pcbdetach(inp); 634 error = 0; 635 } else { 636 error = EINVAL; 637 } 638 lwkt_replymsg(&msg->detach.base.lmsg, error); 639 } 640 641 static void 642 udp6_disconnect(netmsg_t msg) 643 { 644 struct socket *so = msg->disconnect.base.nm_so; 645 struct inpcb *inp; 646 int error; 647 648 inp = so->so_pcb; 649 if (inp == NULL) { 650 error = EINVAL; 651 goto out; 652 } 653 654 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 655 error = ENOTCONN; 656 } else { 657 in6_pcbdisconnect(inp); 658 soclrstate(so, SS_ISCONNECTED); /* XXX */ 659 error = 0; 660 } 661 out: 662 lwkt_replymsg(&msg->disconnect.base.lmsg, error); 663 } 664 665 static void 666 udp6_send(netmsg_t msg) 667 { 668 struct socket *so = msg->send.base.nm_so; 669 struct mbuf *m = msg->send.nm_m; 670 struct sockaddr *addr = msg->send.nm_addr; 671 struct mbuf *control = msg->send.nm_control; 672 struct thread *td = msg->send.nm_td; 673 struct inpcb *inp; 674 int error = 0; 675 676 inp = so->so_pcb; 677 if (inp == NULL) { 678 error = EINVAL; 679 goto bad; 680 } 681 682 if (addr) { 683 struct sockaddr_in6 *sin6; 684 685 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 686 error = EINVAL; 687 goto bad; 688 } 689 if (addr->sa_family != AF_INET6) { 690 error = EAFNOSUPPORT; 691 goto bad; 692 } 693 694 sin6 = (struct sockaddr_in6 *)addr; 695 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 696 error = EADDRNOTAVAIL; 697 goto bad; 698 } 699 } 700 701 error = udp6_output(inp, m, addr, control, td); 702 lwkt_replymsg(&msg->send.base.lmsg, error); 703 return; 704 bad: 705 m_freem(m); 706 lwkt_replymsg(&msg->send.base.lmsg, error); 707 } 708 709 struct pr_usrreqs udp6_usrreqs = { 710 .pru_abort = udp6_abort, 711 .pru_accept = pr_generic_notsupp, 712 .pru_attach = udp6_attach, 713 .pru_bind = udp6_bind, 714 .pru_connect = udp6_connect, 715 .pru_connect2 = pr_generic_notsupp, 716 .pru_control = in6_control_dispatch, 717 .pru_detach = udp6_detach, 718 .pru_disconnect = udp6_disconnect, 719 .pru_listen = pr_generic_notsupp, 720 .pru_peeraddr = in6_setpeeraddr_dispatch, 721 .pru_rcvd = pr_generic_notsupp, 722 .pru_rcvoob = pr_generic_notsupp, 723 .pru_send = udp6_send, 724 .pru_sense = pru_sense_null, 725 .pru_shutdown = udp_shutdown, 726 .pru_sockaddr = in6_setsockaddr_dispatch, 727 .pru_sosend = sosend, 728 .pru_soreceive = soreceive 729 }; 730 731