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 #include <sys/jail.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 /* 107 * UDP protocol inplementation. 108 * Per RFC 768, August, 1980. 109 */ 110 111 extern struct protosw inetsw[]; 112 static int in6_mcmatch (struct inpcb *, struct in6_addr *, struct ifnet *); 113 114 static int 115 in6_mcmatch(struct inpcb *in6p, struct in6_addr *ia6, struct ifnet *ifp) 116 { 117 struct ip6_moptions *im6o = in6p->in6p_moptions; 118 struct in6_multi_mship *imm; 119 120 if (im6o == NULL) 121 return 0; 122 123 for (imm = im6o->im6o_memberships.lh_first; imm != NULL; 124 imm = imm->i6mm_chain.le_next) { 125 if ((ifp == NULL || 126 imm->i6mm_maddr->in6m_ifp == ifp) && 127 IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr, 128 ia6)) 129 return 1; 130 } 131 return 0; 132 } 133 134 int 135 udp6_input(struct mbuf **mp, int *offp, int proto) 136 { 137 struct mbuf *m = *mp; 138 struct ip6_hdr *ip6; 139 struct udphdr *uh; 140 struct inpcb *in6p; 141 struct mbuf *opts = NULL; 142 int off = *offp; 143 int plen, ulen; 144 struct sockaddr_in6 udp_in6; 145 struct socket *so; 146 struct inpcbinfo *pcbinfo = &udbinfo[0]; 147 148 IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE); 149 150 ip6 = mtod(m, struct ip6_hdr *); 151 152 udp_stat.udps_ipackets++; 153 154 plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6); 155 uh = (struct udphdr *)((caddr_t)ip6 + off); 156 ulen = ntohs((u_short)uh->uh_ulen); 157 158 if (plen != ulen) { 159 udp_stat.udps_badlen++; 160 goto bad; 161 } 162 163 /* 164 * Checksum extended UDP header and data. 165 */ 166 if (uh->uh_sum == 0) 167 udp_stat.udps_nosum++; 168 else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) { 169 udp_stat.udps_badsum++; 170 goto bad; 171 } 172 173 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 174 struct inpcb *last, *marker; 175 176 /* 177 * Deliver a multicast datagram to all sockets 178 * for which the local and remote addresses and ports match 179 * those of the incoming datagram. This allows more than 180 * one process to receive multicasts on the same port. 181 * (This really ought to be done for unicast datagrams as 182 * well, but that would cause problems with existing 183 * applications that open both address-specific sockets and 184 * a wildcard socket listening to the same port -- they would 185 * end up receiving duplicates of every unicast datagram. 186 * Those applications open the multiple sockets to overcome an 187 * inadequacy of the UDP socket interface, but for backwards 188 * compatibility we avoid the problem here rather than 189 * fixing the interface. Maybe 4.5BSD will remedy this?) 190 */ 191 192 /* 193 * In a case that laddr should be set to the link-local 194 * address (this happens in RIPng), the multicast address 195 * specified in the received packet does not match with 196 * laddr. To cure this situation, the matching is relaxed 197 * if the receiving interface is the same as one specified 198 * in the socket and if the destination multicast address 199 * matches one of the multicast groups specified in the socket. 200 */ 201 202 /* 203 * Construct sockaddr format source address. 204 */ 205 init_sin6(&udp_in6, m); /* general init */ 206 udp_in6.sin6_port = uh->uh_sport; 207 /* 208 * KAME note: traditionally we dropped udpiphdr from mbuf here. 209 */ 210 211 /* 212 * Locate pcb(s) for datagram. 213 * (Algorithm copied from raw_intr().) 214 */ 215 last = NULL; 216 217 marker = in_pcbmarker(); 218 219 GET_PCBINFO_TOKEN(pcbinfo); 220 221 LIST_INSERT_HEAD(&pcbinfo->pcblisthead, marker, inp_list); 222 while ((in6p = LIST_NEXT(marker, inp_list)) != NULL) { 223 LIST_REMOVE(marker, inp_list); 224 LIST_INSERT_AFTER(in6p, marker, inp_list); 225 226 if (in6p->inp_flags & INP_PLACEMARKER) 227 continue; 228 if (!INP_ISIPV6(in6p)) 229 continue; 230 if (in6p->in6p_lport != uh->uh_dport) 231 continue; 232 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { 233 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, 234 &ip6->ip6_dst) && 235 !in6_mcmatch(in6p, &ip6->ip6_dst, 236 m->m_pkthdr.rcvif)) 237 continue; 238 } 239 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 240 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, 241 &ip6->ip6_src) || 242 in6p->in6p_fport != uh->uh_sport) 243 continue; 244 } 245 246 if (last != NULL) { 247 struct mbuf *n; 248 249 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { 250 /* 251 * KAME NOTE: do not 252 * m_copy(m, offset, ...) above. 253 * ssb_appendaddr() expects M_PKTHDR, 254 * and m_copy() will copy M_PKTHDR 255 * only if offset is 0. 256 */ 257 so = last->in6p_socket; 258 if ((last->in6p_flags & IN6P_CONTROLOPTS) || 259 (so->so_options & SO_TIMESTAMP)) { 260 ip6_savecontrol(last, &opts, 261 ip6, n); 262 } 263 m_adj(n, off + sizeof(struct udphdr)); 264 lwkt_gettoken(&so->so_rcv.ssb_token); 265 if (ssb_appendaddr(&so->so_rcv, 266 (struct sockaddr *)&udp_in6, 267 n, opts) == 0) { 268 m_freem(n); 269 if (opts) 270 m_freem(opts); 271 udp_stat.udps_fullsock++; 272 } else { 273 sorwakeup(so); 274 } 275 lwkt_reltoken(&so->so_rcv.ssb_token); 276 opts = NULL; 277 } 278 } 279 last = in6p; 280 /* 281 * Don't look for additional matches if this one does 282 * not have either the SO_REUSEPORT or SO_REUSEADDR 283 * socket options set. This heuristic avoids searching 284 * through all pcbs in the common case of a non-shared 285 * port. It assumes that an application will never 286 * clear these options after setting them. 287 */ 288 if ((last->in6p_socket->so_options & 289 (SO_REUSEPORT | SO_REUSEADDR)) == 0) 290 break; 291 } 292 LIST_REMOVE(marker, inp_list); 293 294 REL_PCBINFO_TOKEN(pcbinfo); 295 296 if (last == NULL) { 297 /* 298 * No matching pcb found; discard datagram. 299 * (No need to send an ICMP Port Unreachable 300 * for a broadcast or multicast datgram.) 301 */ 302 udp_stat.udps_noport++; 303 udp_stat.udps_noportmcast++; 304 goto bad; 305 } 306 if (last->in6p_flags & IN6P_CONTROLOPTS 307 || last->in6p_socket->so_options & SO_TIMESTAMP) 308 ip6_savecontrol(last, &opts, ip6, m); 309 310 m_adj(m, off + sizeof(struct udphdr)); 311 so = last->in6p_socket; 312 lwkt_gettoken(&so->so_rcv.ssb_token); 313 if (ssb_appendaddr(&so->so_rcv, (struct sockaddr *)&udp_in6, 314 m, opts) == 0) { 315 udp_stat.udps_fullsock++; 316 lwkt_reltoken(&so->so_rcv.ssb_token); 317 goto bad; 318 } 319 sorwakeup(so); 320 lwkt_reltoken(&so->so_rcv.ssb_token); 321 return IPPROTO_DONE; 322 } 323 /* 324 * Locate pcb for datagram. 325 */ 326 in6p = in6_pcblookup_hash(pcbinfo, &ip6->ip6_src, uh->uh_sport, 327 &ip6->ip6_dst, uh->uh_dport, 1, 328 m->m_pkthdr.rcvif); 329 if (in6p == NULL) { 330 if (log_in_vain) { 331 char buf[INET6_ADDRSTRLEN]; 332 333 strcpy(buf, ip6_sprintf(&ip6->ip6_dst)); 334 log(LOG_INFO, 335 "Connection attempt to UDP [%s]:%d from [%s]:%d\n", 336 buf, ntohs(uh->uh_dport), 337 ip6_sprintf(&ip6->ip6_src), ntohs(uh->uh_sport)); 338 } 339 udp_stat.udps_noport++; 340 if (m->m_flags & M_MCAST) { 341 kprintf("UDP6: M_MCAST is set in a unicast packet.\n"); 342 udp_stat.udps_noportmcast++; 343 goto bad; 344 } 345 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0); 346 return IPPROTO_DONE; 347 } 348 349 /* 350 * Construct sockaddr format source address. 351 * Stuff source address and datagram in user buffer. 352 */ 353 init_sin6(&udp_in6, m); /* general init */ 354 udp_in6.sin6_port = uh->uh_sport; 355 if (in6p->in6p_flags & IN6P_CONTROLOPTS 356 || in6p->in6p_socket->so_options & SO_TIMESTAMP) 357 ip6_savecontrol(in6p, &opts, ip6, m); 358 m_adj(m, off + sizeof(struct udphdr)); 359 so = in6p->in6p_socket; 360 lwkt_gettoken(&so->so_rcv.ssb_token); 361 if (ssb_appendaddr(&so->so_rcv, (struct sockaddr *)&udp_in6, 362 m, opts) == 0) { 363 udp_stat.udps_fullsock++; 364 lwkt_reltoken(&so->so_rcv.ssb_token); 365 goto bad; 366 } 367 sorwakeup(so); 368 lwkt_reltoken(&so->so_rcv.ssb_token); 369 return IPPROTO_DONE; 370 bad: 371 if (m) 372 m_freem(m); 373 if (opts) 374 m_freem(opts); 375 return IPPROTO_DONE; 376 } 377 378 void 379 udp6_ctlinput(netmsg_t msg) 380 { 381 int cmd = msg->ctlinput.nm_cmd; 382 struct sockaddr *sa = msg->ctlinput.nm_arg; 383 void *d = msg->ctlinput.nm_extra; 384 struct udphdr uh; 385 struct ip6_hdr *ip6; 386 struct mbuf *m; 387 int off = 0; 388 struct ip6ctlparam *ip6cp = NULL; 389 const struct sockaddr_in6 *sa6_src = NULL; 390 inp_notify_t notify = udp_notify; 391 struct udp_portonly { 392 u_int16_t uh_sport; 393 u_int16_t uh_dport; 394 } *uhp; 395 396 if (sa->sa_family != AF_INET6 || 397 sa->sa_len != sizeof(struct sockaddr_in6)) 398 goto out; 399 400 if ((unsigned)cmd >= PRC_NCMDS) 401 goto out; 402 if (PRC_IS_REDIRECT(cmd)) 403 notify = in6_rtchange, d = NULL; 404 else if (cmd == PRC_HOSTDEAD) 405 d = NULL; 406 else if (inet6ctlerrmap[cmd] == 0) 407 goto out; 408 409 /* if the parameter is from icmp6, decode it. */ 410 if (d != NULL) { 411 ip6cp = (struct ip6ctlparam *)d; 412 m = ip6cp->ip6c_m; 413 ip6 = ip6cp->ip6c_ip6; 414 off = ip6cp->ip6c_off; 415 sa6_src = ip6cp->ip6c_src; 416 } else { 417 m = NULL; 418 ip6 = NULL; 419 sa6_src = &sa6_any; 420 } 421 422 if (ip6) { 423 /* 424 * XXX: We assume that when IPV6 is non NULL, 425 * M and OFF are valid. 426 */ 427 428 /* check if we can safely examine src and dst ports */ 429 if (m->m_pkthdr.len < off + sizeof(*uhp)) 430 return; 431 432 bzero(&uh, sizeof(uh)); 433 m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh); 434 435 in6_pcbnotify(&udbinfo[0], sa, uh.uh_dport, 436 (struct sockaddr *)ip6cp->ip6c_src, uh.uh_sport, 437 cmd, 0, notify); 438 } else { 439 in6_pcbnotify(&udbinfo[0], sa, 0, 440 (const struct sockaddr *)sa6_src, 0, 441 cmd, 0, notify); 442 } 443 out: 444 lwkt_replymsg(&msg->ctlinput.base.lmsg, 0); 445 } 446 447 static int 448 udp6_getcred(SYSCTL_HANDLER_ARGS) 449 { 450 struct sockaddr_in6 addrs[2]; 451 struct inpcb *inp; 452 int error; 453 454 error = priv_check(req->td, PRIV_ROOT); 455 if (error) 456 return (error); 457 458 if (req->newlen != sizeof(addrs)) 459 return (EINVAL); 460 if (req->oldlen != sizeof(struct ucred)) 461 return (EINVAL); 462 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 463 if (error) 464 return (error); 465 crit_enter(); 466 inp = in6_pcblookup_hash(&udbinfo[0], &addrs[1].sin6_addr, 467 addrs[1].sin6_port, 468 &addrs[0].sin6_addr, addrs[0].sin6_port, 469 1, NULL); 470 if (!inp || !inp->inp_socket) { 471 error = ENOENT; 472 goto out; 473 } 474 error = SYSCTL_OUT(req, inp->inp_socket->so_cred, 475 sizeof(struct ucred)); 476 477 out: 478 crit_exit(); 479 return (error); 480 } 481 482 SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW, 483 0, 0, 484 udp6_getcred, "S,ucred", "Get the ucred of a UDP6 connection"); 485 486 /* 487 * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort() 488 * will sofree() it when we return. 489 */ 490 static void 491 udp6_abort(netmsg_t msg) 492 { 493 struct socket *so = msg->abort.base.nm_so; 494 struct inpcb *inp; 495 int error; 496 497 inp = so->so_pcb; 498 if (inp) { 499 soisdisconnected(so); 500 501 in6_pcbdetach(inp); 502 error = 0; 503 } else { 504 error = EINVAL; 505 } 506 lwkt_replymsg(&msg->abort.base.lmsg, error); 507 } 508 509 static void 510 udp6_attach(netmsg_t msg) 511 { 512 struct socket *so = msg->attach.base.nm_so; 513 struct pru_attach_info *ai = msg->attach.nm_ai; 514 struct inpcb *inp; 515 int error; 516 517 inp = so->so_pcb; 518 if (inp != NULL) { 519 error = EINVAL; 520 goto out; 521 } 522 523 if (so->so_snd.ssb_hiwat == 0 || so->so_rcv.ssb_hiwat == 0) { 524 error = soreserve(so, udp_sendspace, udp_recvspace, 525 ai->sb_rlimit); 526 if (error) 527 goto out; 528 } 529 530 error = in_pcballoc(so, &udbinfo[0]); 531 if (error) 532 goto out; 533 534 inp = (struct inpcb *)so->so_pcb; 535 inp->in6p_hops = -1; /* use kernel default */ 536 inp->in6p_cksum = -1; /* just to be sure */ 537 /* 538 * XXX: ugly!! 539 * IPv4 TTL initialization is necessary for an IPv6 socket as well, 540 * because the socket may be bound to an IPv6 wildcard address, 541 * which may match an IPv4-mapped IPv6 address. 542 */ 543 inp->inp_ip_ttl = ip_defttl; 544 error = 0; 545 out: 546 lwkt_replymsg(&msg->attach.base.lmsg, error); 547 } 548 549 static void 550 udp6_bind(netmsg_t msg) 551 { 552 struct socket *so =msg->bind.base.nm_so; 553 struct sockaddr *nam = msg->bind.nm_nam; 554 struct thread *td = msg->bind.nm_td; 555 struct sockaddr_in6 *sin6_p = (struct sockaddr_in6 *)nam; 556 struct inpcb *inp; 557 int error; 558 559 inp = so->so_pcb; 560 if (inp == NULL) { 561 error = EINVAL; 562 goto out; 563 } 564 565 error = in6_pcbbind(inp, nam, td); 566 if (error == 0) { 567 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) 568 inp->inp_flags |= INP_WASBOUND_NOTANY; 569 in_pcbinswildcardhash(inp); 570 } 571 out: 572 lwkt_replymsg(&msg->bind.base.lmsg, error); 573 } 574 575 static void 576 udp6_connect(netmsg_t msg) 577 { 578 struct socket *so = msg->connect.base.nm_so; 579 struct sockaddr *nam = msg->connect.nm_nam; 580 struct thread *td = msg->connect.nm_td; 581 struct sockaddr_in6 *sin6_p; 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 sin6_p = (struct sockaddr_in6 *)nam; 592 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 593 error = EADDRNOTAVAIL; 594 goto out; 595 } 596 597 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 598 error = EISCONN; 599 goto out; 600 } 601 if (inp->inp_flags & INP_WILDCARD) 602 in_pcbremwildcardhash(inp); 603 if (!prison_remote_ip(td, nam)) { 604 error = EAFNOSUPPORT; /* IPv4 only jail */ 605 goto out; 606 } 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