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 soroverflow(so); 273 } else { 274 sorwakeup(so); 275 } 276 lwkt_reltoken(&so->so_rcv.ssb_token); 277 opts = NULL; 278 } 279 } 280 last = in6p; 281 /* 282 * Don't look for additional matches if this one does 283 * not have either the SO_REUSEPORT or SO_REUSEADDR 284 * socket options set. This heuristic avoids searching 285 * through all pcbs in the common case of a non-shared 286 * port. It assumes that an application will never 287 * clear these options after setting them. 288 */ 289 if ((last->in6p_socket->so_options & 290 (SO_REUSEPORT | SO_REUSEADDR)) == 0) 291 break; 292 } 293 LIST_REMOVE(marker, inp_list); 294 295 REL_PCBINFO_TOKEN(pcbinfo); 296 297 if (last == NULL) { 298 /* 299 * No matching pcb found; discard datagram. 300 * (No need to send an ICMP Port Unreachable 301 * for a broadcast or multicast datgram.) 302 */ 303 udp_stat.udps_noport++; 304 udp_stat.udps_noportmcast++; 305 goto bad; 306 } 307 if (last->in6p_flags & IN6P_CONTROLOPTS 308 || last->in6p_socket->so_options & SO_TIMESTAMP) 309 ip6_savecontrol(last, &opts, ip6, m); 310 311 m_adj(m, off + sizeof(struct udphdr)); 312 so = last->in6p_socket; 313 lwkt_gettoken(&so->so_rcv.ssb_token); 314 if (ssb_appendaddr(&so->so_rcv, (struct sockaddr *)&udp_in6, 315 m, opts) == 0) { 316 udp_stat.udps_fullsock++; 317 soroverflow(so); 318 lwkt_reltoken(&so->so_rcv.ssb_token); 319 goto bad; 320 } 321 sorwakeup(so); 322 lwkt_reltoken(&so->so_rcv.ssb_token); 323 return IPPROTO_DONE; 324 } 325 /* 326 * Locate pcb for datagram. 327 */ 328 in6p = in6_pcblookup_hash(pcbinfo, &ip6->ip6_src, uh->uh_sport, 329 &ip6->ip6_dst, uh->uh_dport, 1, 330 m->m_pkthdr.rcvif); 331 if (in6p == NULL) { 332 if (log_in_vain) { 333 char buf[INET6_ADDRSTRLEN]; 334 335 strcpy(buf, ip6_sprintf(&ip6->ip6_dst)); 336 log(LOG_INFO, 337 "Connection attempt to UDP [%s]:%d from [%s]:%d\n", 338 buf, ntohs(uh->uh_dport), 339 ip6_sprintf(&ip6->ip6_src), ntohs(uh->uh_sport)); 340 } 341 udp_stat.udps_noport++; 342 if (m->m_flags & M_MCAST) { 343 kprintf("UDP6: M_MCAST is set in a unicast packet.\n"); 344 udp_stat.udps_noportmcast++; 345 goto bad; 346 } 347 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0); 348 return IPPROTO_DONE; 349 } 350 351 /* 352 * Construct sockaddr format source address. 353 * Stuff source address and datagram in user buffer. 354 */ 355 init_sin6(&udp_in6, m); /* general init */ 356 udp_in6.sin6_port = uh->uh_sport; 357 if (in6p->in6p_flags & IN6P_CONTROLOPTS 358 || in6p->in6p_socket->so_options & SO_TIMESTAMP) 359 ip6_savecontrol(in6p, &opts, ip6, m); 360 m_adj(m, off + sizeof(struct udphdr)); 361 so = in6p->in6p_socket; 362 lwkt_gettoken(&so->so_rcv.ssb_token); 363 if (ssb_appendaddr(&so->so_rcv, (struct sockaddr *)&udp_in6, 364 m, opts) == 0) { 365 udp_stat.udps_fullsock++; 366 soroverflow(so); 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 bad: 374 if (m) 375 m_freem(m); 376 if (opts) 377 m_freem(opts); 378 return IPPROTO_DONE; 379 } 380 381 void 382 udp6_ctlinput(netmsg_t msg) 383 { 384 int cmd = msg->ctlinput.nm_cmd; 385 struct sockaddr *sa = msg->ctlinput.nm_arg; 386 void *d = msg->ctlinput.nm_extra; 387 struct udphdr uh; 388 struct ip6_hdr *ip6; 389 struct mbuf *m; 390 int off = 0; 391 struct ip6ctlparam *ip6cp = NULL; 392 const struct sockaddr_in6 *sa6_src = NULL; 393 inp_notify_t notify = udp_notify; 394 struct udp_portonly { 395 u_int16_t uh_sport; 396 u_int16_t uh_dport; 397 } *uhp; 398 399 if (sa->sa_family != AF_INET6 || 400 sa->sa_len != sizeof(struct sockaddr_in6)) 401 goto out; 402 403 if ((unsigned)cmd >= PRC_NCMDS) 404 goto out; 405 if (PRC_IS_REDIRECT(cmd)) 406 notify = in6_rtchange, d = NULL; 407 else if (cmd == PRC_HOSTDEAD) 408 d = NULL; 409 else if (inet6ctlerrmap[cmd] == 0) 410 goto out; 411 412 /* if the parameter is from icmp6, decode it. */ 413 if (d != NULL) { 414 ip6cp = (struct ip6ctlparam *)d; 415 m = ip6cp->ip6c_m; 416 ip6 = ip6cp->ip6c_ip6; 417 off = ip6cp->ip6c_off; 418 sa6_src = ip6cp->ip6c_src; 419 } else { 420 m = NULL; 421 ip6 = NULL; 422 sa6_src = &sa6_any; 423 } 424 425 if (ip6) { 426 /* 427 * XXX: We assume that when IPV6 is non NULL, 428 * M and OFF are valid. 429 */ 430 431 /* check if we can safely examine src and dst ports */ 432 if (m->m_pkthdr.len < off + sizeof(*uhp)) 433 return; 434 435 bzero(&uh, sizeof(uh)); 436 m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh); 437 438 in6_pcbnotify(&udbinfo[0], sa, uh.uh_dport, 439 (struct sockaddr *)ip6cp->ip6c_src, uh.uh_sport, 440 cmd, 0, notify); 441 } else { 442 in6_pcbnotify(&udbinfo[0], sa, 0, 443 (const struct sockaddr *)sa6_src, 0, 444 cmd, 0, notify); 445 } 446 out: 447 lwkt_replymsg(&msg->ctlinput.base.lmsg, 0); 448 } 449 450 static int 451 udp6_getcred(SYSCTL_HANDLER_ARGS) 452 { 453 struct sockaddr_in6 addrs[2]; 454 struct inpcb *inp; 455 int error; 456 457 error = priv_check(req->td, PRIV_ROOT); 458 if (error) 459 return (error); 460 461 if (req->newlen != sizeof(addrs)) 462 return (EINVAL); 463 if (req->oldlen != sizeof(struct ucred)) 464 return (EINVAL); 465 error = SYSCTL_IN(req, addrs, sizeof(addrs)); 466 if (error) 467 return (error); 468 crit_enter(); 469 inp = in6_pcblookup_hash(&udbinfo[0], &addrs[1].sin6_addr, 470 addrs[1].sin6_port, 471 &addrs[0].sin6_addr, addrs[0].sin6_port, 472 1, NULL); 473 if (!inp || !inp->inp_socket) { 474 error = ENOENT; 475 goto out; 476 } 477 error = SYSCTL_OUT(req, inp->inp_socket->so_cred, 478 sizeof(struct ucred)); 479 480 out: 481 crit_exit(); 482 return (error); 483 } 484 485 SYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW, 486 0, 0, 487 udp6_getcred, "S,ucred", "Get the ucred of a UDP6 connection"); 488 489 /* 490 * NOTE: (so) is referenced from soabort*() and netmsg_pru_abort() 491 * will sofree() it when we return. 492 */ 493 static void 494 udp6_abort(netmsg_t msg) 495 { 496 struct socket *so = msg->abort.base.nm_so; 497 struct inpcb *inp; 498 int error; 499 500 inp = so->so_pcb; 501 if (inp) { 502 soisdisconnected(so); 503 504 in6_pcbdetach(inp); 505 error = 0; 506 } else { 507 error = EINVAL; 508 } 509 lwkt_replymsg(&msg->abort.base.lmsg, error); 510 } 511 512 static void 513 udp6_attach(netmsg_t msg) 514 { 515 struct socket *so = msg->attach.base.nm_so; 516 struct pru_attach_info *ai = msg->attach.nm_ai; 517 struct inpcb *inp; 518 int error; 519 520 inp = so->so_pcb; 521 if (inp != NULL) { 522 error = EINVAL; 523 goto out; 524 } 525 526 if (so->so_snd.ssb_hiwat == 0 || so->so_rcv.ssb_hiwat == 0) { 527 error = soreserve(so, udp_sendspace, udp_recvspace, 528 ai->sb_rlimit); 529 if (error) 530 goto out; 531 } 532 533 error = in_pcballoc(so, &udbinfo[0]); 534 if (error) 535 goto out; 536 537 inp = (struct inpcb *)so->so_pcb; 538 inp->in6p_hops = -1; /* use kernel default */ 539 inp->in6p_cksum = -1; /* just to be sure */ 540 /* 541 * XXX: ugly!! 542 * IPv4 TTL initialization is necessary for an IPv6 socket as well, 543 * because the socket may be bound to an IPv6 wildcard address, 544 * which may match an IPv4-mapped IPv6 address. 545 */ 546 inp->inp_ip_ttl = ip_defttl; 547 error = 0; 548 out: 549 lwkt_replymsg(&msg->attach.base.lmsg, error); 550 } 551 552 static void 553 udp6_bind(netmsg_t msg) 554 { 555 struct socket *so =msg->bind.base.nm_so; 556 struct sockaddr *nam = msg->bind.nm_nam; 557 struct thread *td = msg->bind.nm_td; 558 struct sockaddr_in6 *sin6_p = (struct sockaddr_in6 *)nam; 559 struct inpcb *inp; 560 int error; 561 562 inp = so->so_pcb; 563 if (inp == NULL) { 564 error = EINVAL; 565 goto out; 566 } 567 568 error = in6_pcbbind(inp, nam, td); 569 if (error == 0) { 570 if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) 571 inp->inp_flags |= INP_WASBOUND_NOTANY; 572 in_pcbinswildcardhash(inp); 573 } 574 out: 575 lwkt_replymsg(&msg->bind.base.lmsg, error); 576 } 577 578 static void 579 udp6_connect(netmsg_t msg) 580 { 581 struct socket *so = msg->connect.base.nm_so; 582 struct sockaddr *nam = msg->connect.nm_nam; 583 struct thread *td = msg->connect.nm_td; 584 struct sockaddr_in6 *sin6_p; 585 struct inpcb *inp; 586 int error; 587 588 inp = so->so_pcb; 589 if (inp == NULL) { 590 error = EINVAL; 591 goto out; 592 } 593 594 sin6_p = (struct sockaddr_in6 *)nam; 595 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 596 error = EADDRNOTAVAIL; 597 goto out; 598 } 599 600 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 601 error = EISCONN; 602 goto out; 603 } 604 if (inp->inp_flags & INP_WILDCARD) 605 in_pcbremwildcardhash(inp); 606 if (!prison_remote_ip(td, nam)) { 607 error = EAFNOSUPPORT; /* IPv4 only jail */ 608 goto out; 609 } 610 error = in6_pcbconnect(inp, nam, td); 611 if (error == 0) { 612 soisconnected(so); 613 } else if (error == EAFNOSUPPORT) { /* connection dissolved */ 614 /* 615 * Follow traditional BSD behavior and retain 616 * the local port binding. But, fix the old misbehavior 617 * of overwriting any previously bound local address. 618 */ 619 if (!(inp->inp_flags & INP_WASBOUND_NOTANY)) 620 inp->in6p_laddr = kin6addr_any; 621 in_pcbinswildcardhash(inp); 622 } 623 out: 624 lwkt_replymsg(&msg->connect.base.lmsg, error); 625 } 626 627 static void 628 udp6_detach(netmsg_t msg) 629 { 630 struct socket *so = msg->detach.base.nm_so; 631 struct inpcb *inp; 632 int error; 633 634 inp = so->so_pcb; 635 if (inp) { 636 in6_pcbdetach(inp); 637 error = 0; 638 } else { 639 error = EINVAL; 640 } 641 lwkt_replymsg(&msg->detach.base.lmsg, error); 642 } 643 644 static void 645 udp6_disconnect(netmsg_t msg) 646 { 647 struct socket *so = msg->disconnect.base.nm_so; 648 struct inpcb *inp; 649 int error; 650 651 inp = so->so_pcb; 652 if (inp == NULL) { 653 error = EINVAL; 654 goto out; 655 } 656 657 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 658 error = ENOTCONN; 659 } else { 660 in6_pcbdisconnect(inp); 661 soclrstate(so, SS_ISCONNECTED); /* XXX */ 662 error = 0; 663 } 664 out: 665 lwkt_replymsg(&msg->disconnect.base.lmsg, error); 666 } 667 668 static void 669 udp6_send(netmsg_t msg) 670 { 671 struct socket *so = msg->send.base.nm_so; 672 struct mbuf *m = msg->send.nm_m; 673 struct sockaddr *addr = msg->send.nm_addr; 674 struct mbuf *control = msg->send.nm_control; 675 struct thread *td = msg->send.nm_td; 676 struct inpcb *inp; 677 int error = 0; 678 679 inp = so->so_pcb; 680 if (inp == NULL) { 681 error = EINVAL; 682 goto bad; 683 } 684 685 if (addr) { 686 struct sockaddr_in6 *sin6; 687 688 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 689 error = EINVAL; 690 goto bad; 691 } 692 if (addr->sa_family != AF_INET6) { 693 error = EAFNOSUPPORT; 694 goto bad; 695 } 696 697 sin6 = (struct sockaddr_in6 *)addr; 698 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 699 error = EADDRNOTAVAIL; 700 goto bad; 701 } 702 } 703 704 error = udp6_output(inp, m, addr, control, td); 705 lwkt_replymsg(&msg->send.base.lmsg, error); 706 return; 707 bad: 708 m_freem(m); 709 lwkt_replymsg(&msg->send.base.lmsg, error); 710 } 711 712 struct pr_usrreqs udp6_usrreqs = { 713 .pru_abort = udp6_abort, 714 .pru_accept = pr_generic_notsupp, 715 .pru_attach = udp6_attach, 716 .pru_bind = udp6_bind, 717 .pru_connect = udp6_connect, 718 .pru_connect2 = pr_generic_notsupp, 719 .pru_control = in6_control_dispatch, 720 .pru_detach = udp6_detach, 721 .pru_disconnect = udp6_disconnect, 722 .pru_listen = pr_generic_notsupp, 723 .pru_peeraddr = in6_setpeeraddr_dispatch, 724 .pru_rcvd = pr_generic_notsupp, 725 .pru_rcvoob = pr_generic_notsupp, 726 .pru_send = udp6_send, 727 .pru_sense = pru_sense_null, 728 .pru_shutdown = udp_shutdown, 729 .pru_sockaddr = in6_setsockaddr_dispatch, 730 .pru_sosend = sosend, 731 .pru_soreceive = soreceive 732 }; 733 734