udp6_usrreq.c revision 1.44
1 /* $NetBSD: udp6_usrreq.c,v 1.44 2001/07/03 08:06:20 itojun Exp $ */ 2 /* $KAME: udp6_usrreq.c,v 1.86 2001/05/27 17:33:00 itojun 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. All advertising materials mentioning features or use of this software 46 * must display the following acknowledgement: 47 * This product includes software developed by the University of 48 * California, Berkeley and its contributors. 49 * 4. Neither the name of the University nor the names of its contributors 50 * may be used to endorse or promote products derived from this software 51 * without specific prior written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 63 * SUCH DAMAGE. 64 * 65 * @(#)udp_var.h 8.1 (Berkeley) 6/10/93 66 */ 67 68 #include "opt_ipsec.h" 69 70 #include <sys/param.h> 71 #include <sys/malloc.h> 72 #include <sys/mbuf.h> 73 #include <sys/protosw.h> 74 #include <sys/socket.h> 75 #include <sys/socketvar.h> 76 #include <sys/errno.h> 77 #include <sys/stat.h> 78 #include <sys/systm.h> 79 #include <sys/proc.h> 80 #include <sys/syslog.h> 81 82 #include <net/if.h> 83 #include <net/route.h> 84 #include <net/if_types.h> 85 86 #include <netinet/in.h> 87 #include <netinet/in_var.h> 88 #include <netinet/in_systm.h> 89 #include <netinet/ip.h> 90 #include <netinet/ip_var.h> 91 #include <netinet/in_pcb.h> 92 #include <netinet/udp.h> 93 #include <netinet/udp_var.h> 94 #include <netinet/ip6.h> 95 #include <netinet6/ip6_var.h> 96 #include <netinet6/in6_pcb.h> 97 #include <netinet/icmp6.h> 98 #include <netinet6/udp6_var.h> 99 #include <netinet6/ip6protosw.h> 100 101 #ifdef IPSEC 102 #include <netinet6/ipsec.h> 103 #endif /*IPSEC*/ 104 105 #include "faith.h" 106 #if defined(NFAITH) && NFAITH > 0 107 #include <net/if_faith.h> 108 #endif 109 110 /* 111 * UDP protocol inplementation. 112 * Per RFC 768, August, 1980. 113 */ 114 115 struct in6pcb *udp6_last_in6pcb = &udb6; 116 117 #ifdef UDP6 118 static int in6_mcmatch __P((struct in6pcb *, struct in6_addr *, struct ifnet *)); 119 #endif 120 static void udp6_detach __P((struct in6pcb *)); 121 static void udp6_notify __P((struct in6pcb *, int)); 122 123 void 124 udp6_init() 125 { 126 udb6.in6p_next = udb6.in6p_prev = &udb6; 127 } 128 129 #ifdef UDP6 130 static int 131 in6_mcmatch(in6p, ia6, ifp) 132 struct in6pcb *in6p; 133 struct in6_addr *ia6; 134 struct ifnet *ifp; 135 { 136 struct ip6_moptions *im6o = in6p->in6p_moptions; 137 struct in6_multi_mship *imm; 138 139 if (im6o == NULL) 140 return 0; 141 142 for (imm = im6o->im6o_memberships.lh_first; imm != NULL; 143 imm = imm->i6mm_chain.le_next) { 144 if ((ifp == NULL || 145 imm->i6mm_maddr->in6m_ifp == ifp) && 146 IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr, 147 ia6)) 148 return 1; 149 } 150 return 0; 151 } 152 153 int 154 udp6_input(mp, offp, proto) 155 struct mbuf **mp; 156 int *offp, proto; 157 { 158 struct mbuf *m = *mp; 159 struct ip6_hdr *ip6; 160 struct udphdr *uh; 161 struct in6pcb *in6p; 162 struct mbuf *opts = 0; 163 int off = *offp; 164 u_int32_t plen, ulen; 165 struct sockaddr_in6 udp_in6; 166 167 ip6 = mtod(m, struct ip6_hdr *); 168 169 #if defined(NFAITH) && 0 < NFAITH 170 if (faithprefix(&ip6->ip6_dst)) { 171 /* send icmp6 host unreach? */ 172 m_freem(m); 173 return IPPROTO_DONE; 174 } 175 #endif 176 177 udp6stat.udp6s_ipackets++; 178 179 /* check for jumbogram is done in ip6_input. we can trust pkthdr.len */ 180 plen = m->m_pkthdr.len - off; 181 #ifndef PULLDOWN_TEST 182 IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE); 183 uh = (struct udphdr *)((caddr_t)ip6 + off); 184 #else 185 IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(struct udphdr)); 186 if (uh == NULL) { 187 udp6stat.udp6s_hdrops++; 188 return IPPROTO_DONE; 189 } 190 #endif 191 ulen = ntohs((u_short)uh->uh_ulen); 192 /* 193 * RFC2675 section 4: jumbograms will have 0 in the UDP header field, 194 * iff payload length > 0xffff. 195 */ 196 if (ulen == 0 && plen > 0xffff) 197 ulen = plen; 198 199 if (plen != ulen) { 200 udp6stat.udp6s_badlen++; 201 goto bad; 202 } 203 204 /* destination port of 0 is illegal, based on RFC768. */ 205 if (uh->uh_dport == 0) 206 goto bad; 207 208 /* Be proactive about malicious use of IPv4 mapped address */ 209 if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || 210 IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { 211 /* XXX stat */ 212 goto bad; 213 } 214 215 /* 216 * Checksum extended UDP header and data. 217 */ 218 if (uh->uh_sum == 0) 219 udp6stat.udp6s_nosum++; 220 else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) { 221 udp6stat.udp6s_badsum++; 222 goto bad; 223 } 224 225 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 226 struct in6pcb *last; 227 228 /* 229 * Deliver a multicast datagram to all sockets 230 * for which the local and remote addresses and ports match 231 * those of the incoming datagram. This allows more than 232 * one process to receive multicasts on the same port. 233 * (This really ought to be done for unicast datagrams as 234 * well, but that would cause problems with existing 235 * applications that open both address-specific sockets and 236 * a wildcard socket listening to the same port -- they would 237 * end up receiving duplicates of every unicast datagram. 238 * Those applications open the multiple sockets to overcome an 239 * inadequacy of the UDP socket interface, but for backwards 240 * compatibility we avoid the problem here rather than 241 * fixing the interface. Maybe 4.5BSD will remedy this?) 242 */ 243 244 /* 245 * In a case that laddr should be set to the link-local 246 * address (this happens in RIPng), the multicast address 247 * specified in the received packet does not match with 248 * laddr. To cure this situation, the matching is relaxed 249 * if the receiving interface is the same as one specified 250 * in the socket and if the destination multicast address 251 * matches one of the multicast groups specified in the socket. 252 */ 253 254 /* 255 * Construct sockaddr format source address. 256 */ 257 bzero(&udp_in6, sizeof(udp_in6)); 258 udp_in6.sin6_len = sizeof(struct sockaddr_in6); 259 udp_in6.sin6_family = AF_INET6; 260 udp_in6.sin6_port = uh->uh_sport; 261 #if 0 /*XXX inbound flowinfo */ 262 udp_in6.sin6_flowinfo = ip6->ip6_flow & IPV6_FLOWINFO_MASK; 263 #endif 264 /* KAME hack: recover scopeid */ 265 (void)in6_recoverscope(&udp_in6, &ip6->ip6_src, 266 m->m_pkthdr.rcvif); 267 268 /* 269 * KAME note: usually we drop udphdr from mbuf here. 270 * We need udphdr for IPsec processing so we do that later. 271 */ 272 273 /* 274 * Locate pcb(s) for datagram. 275 * (Algorithm copied from raw_intr().) 276 */ 277 last = NULL; 278 for (in6p = udb6.in6p_next; 279 in6p != &udb6; 280 in6p = in6p->in6p_next) { 281 if (in6p->in6p_lport != uh->uh_dport) 282 continue; 283 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { 284 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, 285 &ip6->ip6_dst) && 286 !in6_mcmatch(in6p, &ip6->ip6_dst, 287 m->m_pkthdr.rcvif)) 288 continue; 289 } 290 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 291 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, 292 &ip6->ip6_src) || 293 in6p->in6p_fport != uh->uh_sport) 294 continue; 295 } 296 297 if (last != NULL) { 298 struct mbuf *n; 299 300 #ifdef IPSEC 301 /* 302 * Check AH/ESP integrity. 303 */ 304 if (ipsec6_in_reject(m, last)) { 305 ipsec6stat.in_polvio++; 306 /* do not inject data into pcb */ 307 } else 308 #endif /*IPSEC*/ 309 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { 310 /* 311 * KAME NOTE: do not 312 * m_copy(m, offset, ...) above. 313 * sbappendaddr() expects M_PKTHDR, 314 * and m_copy() will copy M_PKTHDR 315 * only if offset is 0. 316 */ 317 if (last->in6p_flags & IN6P_CONTROLOPTS 318 || last->in6p_socket->so_options & SO_TIMESTAMP) { 319 ip6_savecontrol(last, &opts, 320 ip6, n); 321 } 322 323 m_adj(n, off + sizeof(struct udphdr)); 324 if (sbappendaddr(&last->in6p_socket->so_rcv, 325 (struct sockaddr *)&udp_in6, 326 n, opts) == 0) { 327 m_freem(n); 328 if (opts) 329 m_freem(opts); 330 udp6stat.udp6s_fullsock++; 331 } else 332 sorwakeup(last->in6p_socket); 333 opts = 0; 334 } 335 } 336 last = in6p; 337 /* 338 * Don't look for additional matches if this one does 339 * not have either the SO_REUSEPORT or SO_REUSEADDR 340 * socket options set. This heuristic avoids searching 341 * through all pcbs in the common case of a non-shared 342 * port. It assumes that an application will never 343 * clear these options after setting them. 344 */ 345 if ((last->in6p_socket->so_options & 346 (SO_REUSEPORT|SO_REUSEADDR)) == 0) 347 break; 348 } 349 350 if (last == NULL) { 351 /* 352 * No matching pcb found; discard datagram. 353 * (No need to send an ICMP Port Unreachable 354 * for a broadcast or multicast datgram.) 355 */ 356 udp6stat.udp6s_noport++; 357 udp6stat.udp6s_noportmcast++; 358 goto bad; 359 } 360 #ifdef IPSEC 361 /* 362 * Check AH/ESP integrity. 363 */ 364 if (last != NULL && ipsec6_in_reject(m, last)) { 365 ipsec6stat.in_polvio++; 366 goto bad; 367 } 368 #endif /*IPSEC*/ 369 if (last->in6p_flags & IN6P_CONTROLOPTS 370 || last->in6p_socket->so_options & SO_TIMESTAMP) { 371 ip6_savecontrol(last, &opts, ip6, m); 372 } 373 374 m_adj(m, off + sizeof(struct udphdr)); 375 if (sbappendaddr(&last->in6p_socket->so_rcv, 376 (struct sockaddr *)&udp_in6, 377 m, opts) == 0) { 378 udp6stat.udp6s_fullsock++; 379 goto bad; 380 } 381 sorwakeup(last->in6p_socket); 382 return IPPROTO_DONE; 383 } 384 /* 385 * Locate pcb for datagram. 386 */ 387 in6p = udp6_last_in6pcb; 388 if (in6p->in6p_lport != uh->uh_dport || 389 in6p->in6p_fport != uh->uh_sport || 390 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src) || 391 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) { 392 in6p = in6_pcblookup(&udb6, 393 &ip6->ip6_src, uh->uh_sport, 394 &ip6->ip6_dst, uh->uh_dport, 395 IN6PLOOKUP_WILDCARD); 396 if (in6p) 397 udp6_last_in6pcb = in6p; 398 udp6stat.udp6ps_pcbcachemiss++; 399 } 400 if (in6p == 0) { 401 udp6stat.udp6s_noport++; 402 if (m->m_flags & M_MCAST) { 403 udp6stat.udp6s_noportmcast++; 404 goto bad; 405 } 406 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0); 407 return IPPROTO_DONE; 408 } 409 #ifdef IPSEC 410 /* 411 * Check AH/ESP integrity. 412 */ 413 if (in6p != NULL && ipsec6_in_reject(m, in6p)) { 414 ipsec6stat.in_polvio++; 415 goto bad; 416 } 417 #endif /*IPSEC*/ 418 419 /* 420 * Construct sockaddr format source address. 421 * Stuff source address and datagram in user buffer. 422 */ 423 bzero(&udp_in6, sizeof(udp_in6)); 424 udp_in6.sin6_len = sizeof(struct sockaddr_in6); 425 udp_in6.sin6_family = AF_INET6; 426 udp_in6.sin6_port = uh->uh_sport; 427 /* KAME hack: recover scopeid */ 428 (void)in6_recoverscope(&udp_in6, &ip6->ip6_src, m->m_pkthdr.rcvif); 429 if (in6p->in6p_flags & IN6P_CONTROLOPTS 430 || in6p->in6p_socket->so_options & SO_TIMESTAMP) { 431 ip6_savecontrol(in6p, &opts, ip6, m); 432 } 433 434 m_adj(m, off + sizeof(struct udphdr)); 435 if (sbappendaddr(&in6p->in6p_socket->so_rcv, 436 (struct sockaddr *)&udp_in6, 437 m, opts) == 0) { 438 udp6stat.udp6s_fullsock++; 439 goto bad; 440 } 441 sorwakeup(in6p->in6p_socket); 442 return IPPROTO_DONE; 443 bad: 444 if (m) 445 m_freem(m); 446 if (opts) 447 m_freem(opts); 448 return IPPROTO_DONE; 449 } 450 #endif 451 452 /* 453 * Notify a udp user of an asynchronous error; 454 * just wake up so that he can collect error status. 455 */ 456 static void 457 udp6_notify(in6p, errno) 458 struct in6pcb *in6p; 459 int errno; 460 { 461 in6p->in6p_socket->so_error = errno; 462 sorwakeup(in6p->in6p_socket); 463 sowwakeup(in6p->in6p_socket); 464 } 465 466 void 467 udp6_ctlinput(cmd, sa, d) 468 int cmd; 469 struct sockaddr *sa; 470 void *d; 471 { 472 struct udphdr uh; 473 struct ip6_hdr *ip6; 474 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa; 475 struct mbuf *m; 476 int off; 477 void *cmdarg; 478 struct ip6ctlparam *ip6cp = NULL; 479 const struct sockaddr_in6 *sa6_src = NULL; 480 void (*notify) __P((struct in6pcb *, int)) = udp6_notify; 481 struct udp_portonly { 482 u_int16_t uh_sport; 483 u_int16_t uh_dport; 484 } *uhp; 485 486 if (sa->sa_family != AF_INET6 || 487 sa->sa_len != sizeof(struct sockaddr_in6)) 488 return; 489 490 if ((unsigned)cmd >= PRC_NCMDS) 491 return; 492 if (PRC_IS_REDIRECT(cmd)) 493 notify = in6_rtchange, d = NULL; 494 else if (cmd == PRC_HOSTDEAD) 495 d = NULL; 496 else if (cmd == PRC_MSGSIZE) 497 ; /* special code is present, see below */ 498 else if (inet6ctlerrmap[cmd] == 0) 499 return; 500 501 /* if the parameter is from icmp6, decode it. */ 502 if (d != NULL) { 503 ip6cp = (struct ip6ctlparam *)d; 504 m = ip6cp->ip6c_m; 505 ip6 = ip6cp->ip6c_ip6; 506 off = ip6cp->ip6c_off; 507 cmdarg = ip6cp->ip6c_cmdarg; 508 sa6_src = ip6cp->ip6c_src; 509 } else { 510 m = NULL; 511 ip6 = NULL; 512 cmdarg = NULL; 513 sa6_src = &sa6_any; 514 } 515 516 if (ip6) { 517 /* 518 * XXX: We assume that when IPV6 is non NULL, 519 * M and OFF are valid. 520 */ 521 522 /* check if we can safely examine src and dst ports */ 523 if (m->m_pkthdr.len < off + sizeof(*uhp)) { 524 if (cmd == PRC_MSGSIZE) 525 icmp6_mtudisc_update((struct ip6ctlparam *)d, 0); 526 return; 527 } 528 529 bzero(&uh, sizeof(uh)); 530 m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh); 531 532 if (cmd == PRC_MSGSIZE) { 533 int valid = 0; 534 535 /* 536 * Check to see if we have a valid UDP socket 537 * corresponding to the address in the ICMPv6 message 538 * payload. 539 */ 540 if (in6_pcblookup_connect(&udb6, &sa6->sin6_addr, 541 uh.uh_dport, (struct in6_addr *)&sa6_src->sin6_addr, 542 uh.uh_sport, 0)) 543 valid++; 544 #if 0 545 /* 546 * As the use of sendto(2) is fairly popular, 547 * we may want to allow non-connected pcb too. 548 * But it could be too weak against attacks... 549 * We should at least check if the local address (= s) 550 * is really ours. 551 */ 552 else if (in6_pcblookup_bind(&udb6, &sa6->sin6_addr, 553 uh.uh_dport, 0)) 554 valid++; 555 #endif 556 557 /* 558 * Depending on the value of "valid" and routing table 559 * size (mtudisc_{hi,lo}wat), we will: 560 * - recalcurate the new MTU and create the 561 * corresponding routing entry, or 562 * - ignore the MTU change notification. 563 */ 564 icmp6_mtudisc_update((struct ip6ctlparam *)d, valid); 565 566 /* 567 * regardless of if we called icmp6_mtudisc_update(), 568 * we need to call in6_pcbnotify(), to notify path 569 * MTU change to the userland (2292bis-02), because 570 * some unconnected sockets may share the same 571 * destination and want to know the path MTU. 572 */ 573 } 574 575 (void) in6_pcbnotify(&udb6, sa, uh.uh_dport, 576 (struct sockaddr *)sa6_src, uh.uh_sport, cmd, cmdarg, 577 notify); 578 } else { 579 (void) in6_pcbnotify(&udb6, sa, 0, (struct sockaddr *)sa6_src, 580 0, cmd, cmdarg, notify); 581 } 582 } 583 584 extern int udp6_sendspace; 585 extern int udp6_recvspace; 586 587 int 588 udp6_usrreq(so, req, m, addr6, control, p) 589 struct socket *so; 590 int req; 591 struct mbuf *m, *addr6, *control; 592 struct proc *p; 593 { 594 struct in6pcb *in6p = sotoin6pcb(so); 595 int error = 0; 596 int s; 597 598 /* 599 * MAPPED_ADDR implementation info: 600 * Mapped addr support for PRU_CONTROL is not necessary. 601 * Because typical user of PRU_CONTROL is such as ifconfig, 602 * and they don't associate any addr to their socket. Then 603 * socket family is only hint about the PRU_CONTROL'ed address 604 * family, especially when getting addrs from kernel. 605 * So AF_INET socket need to be used to control AF_INET addrs, 606 * and AF_INET6 socket for AF_INET6 addrs. 607 */ 608 if (req == PRU_CONTROL) 609 return(in6_control(so, (u_long)m, (caddr_t)addr6, 610 (struct ifnet *)control, p)); 611 612 if (req == PRU_PURGEIF) { 613 in6_pcbpurgeif0(&udb6, (struct ifnet *)control); 614 in6_purgeif((struct ifnet *)control); 615 in6_pcbpurgeif(&udb6, (struct ifnet *)control); 616 return (0); 617 } 618 619 if (in6p == NULL && req != PRU_ATTACH) { 620 error = EINVAL; 621 goto release; 622 } 623 624 switch (req) { 625 case PRU_ATTACH: 626 /* 627 * MAPPED_ADDR implementation spec: 628 * Always attach for IPv6, 629 * and only when necessary for IPv4. 630 */ 631 if (in6p != NULL) { 632 error = EINVAL; 633 break; 634 } 635 s = splsoftnet(); 636 error = in6_pcballoc(so, &udb6); 637 splx(s); 638 if (error) 639 break; 640 error = soreserve(so, udp6_sendspace, udp6_recvspace); 641 if (error) 642 break; 643 in6p = sotoin6pcb(so); 644 in6p->in6p_cksum = -1; /* just to be sure */ 645 #ifdef IPSEC 646 error = ipsec_init_policy(so, &in6p->in6p_sp); 647 if (error != 0) { 648 in6_pcbdetach(in6p); 649 break; 650 } 651 #endif /*IPSEC*/ 652 break; 653 654 case PRU_DETACH: 655 udp6_detach(in6p); 656 break; 657 658 case PRU_BIND: 659 s = splsoftnet(); 660 error = in6_pcbbind(in6p, addr6, p); 661 splx(s); 662 break; 663 664 case PRU_LISTEN: 665 error = EOPNOTSUPP; 666 break; 667 668 case PRU_CONNECT: 669 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 670 error = EISCONN; 671 break; 672 } 673 s = splsoftnet(); 674 error = in6_pcbconnect(in6p, addr6); 675 if (ip6_auto_flowlabel) { 676 in6p->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 677 in6p->in6p_flowinfo |= 678 (htonl(ip6_flow_seq++) & IPV6_FLOWLABEL_MASK); 679 } 680 splx(s); 681 if (error == 0) 682 soisconnected(so); 683 break; 684 685 case PRU_CONNECT2: 686 error = EOPNOTSUPP; 687 break; 688 689 case PRU_ACCEPT: 690 error = EOPNOTSUPP; 691 break; 692 693 case PRU_DISCONNECT: 694 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 695 error = ENOTCONN; 696 break; 697 } 698 s = splsoftnet(); 699 in6_pcbdisconnect(in6p); 700 bzero((caddr_t)&in6p->in6p_laddr, sizeof(in6p->in6p_laddr)); 701 splx(s); 702 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 703 break; 704 705 case PRU_SHUTDOWN: 706 socantsendmore(so); 707 break; 708 709 case PRU_SEND: 710 return(udp6_output(in6p, m, addr6, control, p)); 711 712 case PRU_ABORT: 713 soisdisconnected(so); 714 udp6_detach(in6p); 715 break; 716 717 case PRU_SOCKADDR: 718 in6_setsockaddr(in6p, addr6); 719 break; 720 721 case PRU_PEERADDR: 722 in6_setpeeraddr(in6p, addr6); 723 break; 724 725 case PRU_SENSE: 726 /* 727 * stat: don't bother with a blocksize 728 */ 729 return(0); 730 731 case PRU_SENDOOB: 732 case PRU_FASTTIMO: 733 case PRU_SLOWTIMO: 734 case PRU_PROTORCV: 735 case PRU_PROTOSEND: 736 error = EOPNOTSUPP; 737 break; 738 739 case PRU_RCVD: 740 case PRU_RCVOOB: 741 return(EOPNOTSUPP); /* do not free mbuf's */ 742 743 default: 744 panic("udp6_usrreq"); 745 } 746 747 release: 748 if (control) 749 m_freem(control); 750 if (m) 751 m_freem(m); 752 return(error); 753 } 754 755 static void 756 udp6_detach(in6p) 757 struct in6pcb *in6p; 758 { 759 int s = splsoftnet(); 760 761 if (in6p == udp6_last_in6pcb) 762 udp6_last_in6pcb = &udb6; 763 in6_pcbdetach(in6p); 764 splx(s); 765 } 766 767 #include <uvm/uvm_extern.h> 768 #include <sys/sysctl.h> 769 770 int 771 udp6_sysctl(name, namelen, oldp, oldlenp, newp, newlen) 772 int *name; 773 u_int namelen; 774 void *oldp; 775 size_t *oldlenp; 776 void *newp; 777 size_t newlen; 778 { 779 /* All sysctl names at this level are terminal. */ 780 if (namelen != 1) 781 return ENOTDIR; 782 783 switch (name[0]) { 784 785 case UDP6CTL_SENDSPACE: 786 return sysctl_int(oldp, oldlenp, newp, newlen, 787 &udp6_sendspace); 788 case UDP6CTL_RECVSPACE: 789 return sysctl_int(oldp, oldlenp, newp, newlen, 790 &udp6_recvspace); 791 default: 792 return ENOPROTOOPT; 793 } 794 /* NOTREACHED */ 795 } 796
Indexes created Mon Sep 22 13:09:51 GMT 2025