udp6_usrreq.c revision 1.5
1 /* $NetBSD: udp6_usrreq.c,v 1.5 1999/07/09 22:57:30 thorpej Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1982, 1986, 1989, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. All advertising materials mentioning features or use of this software 45 * must display the following acknowledgement: 46 * This product includes software developed by the University of 47 * California, Berkeley and its contributors. 48 * 4. Neither the name of the University nor the names of its contributors 49 * may be used to endorse or promote products derived from this software 50 * without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 * 64 * @(#)udp_var.h 8.1 (Berkeley) 6/10/93 65 */ 66 67 #include "opt_ipsec.h" 68 69 #include <sys/param.h> 70 #include <sys/malloc.h> 71 #include <sys/mbuf.h> 72 #include <sys/protosw.h> 73 #include <sys/socket.h> 74 #include <sys/socketvar.h> 75 #include <sys/errno.h> 76 #include <sys/stat.h> 77 #include <sys/systm.h> 78 #ifdef __NetBSD__ 79 #include <sys/proc.h> 80 #endif 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 <netinet6/in6_systm.h> 89 #include <netinet6/ip6.h> 90 #include <netinet6/in6_pcb.h> 91 #include <netinet6/ip6_var.h> 92 #include <netinet6/icmp6.h> 93 #include <netinet6/udp6.h> 94 #include <netinet6/udp6_var.h> 95 96 #ifdef IPSEC 97 #include <netinet6/ipsec.h> 98 #endif /*IPSEC*/ 99 100 #include "faith.h" 101 102 /* 103 * UDP protocol inplementation. 104 * Per RFC 768, August, 1980. 105 */ 106 107 struct in6pcb *udp6_last_in6pcb = &udb6; 108 109 static int in6_mcmatch __P((struct in6pcb *, struct in6_addr *, struct ifnet *)); 110 static void udp6_detach __P((struct in6pcb *)); 111 static void udp6_notify __P((struct in6pcb *, int)); 112 113 void 114 udp6_init() 115 { 116 udb6.in6p_next = udb6.in6p_prev = &udb6; 117 } 118 119 static int 120 in6_mcmatch(in6p, ia6, ifp) 121 struct in6pcb *in6p; 122 register struct in6_addr *ia6; 123 struct ifnet *ifp; 124 { 125 struct ip6_moptions *im6o = in6p->in6p_moptions; 126 struct in6_multi_mship *imm; 127 128 if (im6o == NULL) 129 return 0; 130 131 for (imm = im6o->im6o_memberships.lh_first; imm != NULL; 132 imm = imm->i6mm_chain.le_next) { 133 if ((ifp == NULL || 134 imm->i6mm_maddr->in6m_ifp == ifp) && 135 IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr, 136 ia6)) 137 return 1; 138 } 139 return 0; 140 } 141 142 int 143 udp6_input(mp, offp, proto) 144 struct mbuf **mp; 145 int *offp, proto; 146 { 147 struct mbuf *m = *mp; 148 register struct ip6_hdr *ip6; 149 register struct udphdr *uh; 150 register struct in6pcb *in6p; 151 struct mbuf *opts = 0; 152 int off = *offp; 153 int plen, ulen; 154 struct sockaddr_in6 udp_in6; 155 156 #if defined(NFAITH) && 0 < NFAITH 157 if (m->m_pkthdr.rcvif) { 158 if (m->m_pkthdr.rcvif->if_type == IFT_FAITH) { 159 /* send icmp6 host unreach? */ 160 m_freem(m); 161 return IPPROTO_DONE; 162 } 163 } 164 #endif 165 udp6stat.udp6s_ipackets++; 166 167 IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE); 168 169 ip6 = mtod(m, struct ip6_hdr *); 170 plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6); 171 uh = (struct udphdr *)((caddr_t)ip6 + off); 172 ulen = ntohs((u_short)uh->uh_ulen); 173 174 if (plen != ulen) { 175 udp6stat.udp6s_badlen++; 176 goto bad; 177 } 178 179 /* 180 * Checksum extended UDP header and data. 181 */ 182 if (uh->uh_sum == 0) 183 udp6stat.udp6s_nosum++; 184 else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) { 185 udp6stat.udp6s_badsum++; 186 goto bad; 187 } 188 189 if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 190 struct in6pcb *last; 191 192 /* 193 * Deliver a multicast datagram to all sockets 194 * for which the local and remote addresses and ports match 195 * those of the incoming datagram. This allows more than 196 * one process to receive multicasts on the same port. 197 * (This really ought to be done for unicast datagrams as 198 * well, but that would cause problems with existing 199 * applications that open both address-specific sockets and 200 * a wildcard socket listening to the same port -- they would 201 * end up receiving duplicates of every unicast datagram. 202 * Those applications open the multiple sockets to overcome an 203 * inadequacy of the UDP socket interface, but for backwards 204 * compatibility we avoid the problem here rather than 205 * fixing the interface. Maybe 4.5BSD will remedy this?) 206 */ 207 208 /* 209 * In a case that laddr should be set to the link-local 210 * address (this happens in RIPng), the multicast address 211 * specified in the received packet does not match with 212 * laddr. To cure this situation, the matching is relaxed 213 * if the receiving interface is the same as one specified 214 * in the socket and if the destination multicast address 215 * matches one of the multicast groups specified in the socket. 216 */ 217 218 /* 219 * Construct sockaddr format source address. 220 */ 221 bzero(&udp_in6, sizeof(udp_in6)); 222 udp_in6.sin6_len = sizeof(struct sockaddr_in6); 223 udp_in6.sin6_family = AF_INET6; 224 udp_in6.sin6_port = uh->uh_sport; 225 udp_in6.sin6_addr = ip6->ip6_src; 226 if (IN6_IS_SCOPE_LINKLOCAL(&udp_in6.sin6_addr)) 227 udp_in6.sin6_addr.s6_addr16[1] = 0; 228 if (m->m_pkthdr.rcvif) { 229 if (IN6_IS_SCOPE_LINKLOCAL(&udp_in6.sin6_addr)) { 230 udp_in6.sin6_scope_id = 231 m->m_pkthdr.rcvif->if_index; 232 } else 233 udp_in6.sin6_scope_id = 0; 234 } else 235 udp_in6.sin6_scope_id = 0; 236 /* 237 * KAME note: usually we drop udphdr from mbuf here. 238 * We need udphdr for IPsec processing so we do that later. 239 */ 240 241 /* 242 * Locate pcb(s) for datagram. 243 * (Algorithm copied from raw_intr().) 244 */ 245 last = NULL; 246 for (in6p = udb6.in6p_next; 247 in6p != &udb6; 248 in6p = in6p->in6p_next) { 249 if (in6p->in6p_lport != uh->uh_dport) 250 continue; 251 if (!IN6_IS_ADDR_ANY(&in6p->in6p_laddr)) { 252 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, 253 &ip6->ip6_dst) && 254 !in6_mcmatch(in6p, &ip6->ip6_dst, 255 m->m_pkthdr.rcvif)) 256 continue; 257 } 258 if (!IN6_IS_ADDR_ANY(&in6p->in6p_faddr)) { 259 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, 260 &ip6->ip6_src) || 261 in6p->in6p_fport != uh->uh_sport) 262 continue; 263 } 264 265 if (last != NULL) { 266 struct mbuf *n; 267 268 #ifdef IPSEC 269 /* 270 * Check AH/ESP integrity. 271 */ 272 if (last != NULL && ipsec6_in_reject(m, last)) { 273 ipsec6stat.in_polvio++; 274 /* do not inject data into pcb */ 275 } else 276 #endif /*IPSEC*/ 277 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { 278 /* 279 * KAME NOTE: do not 280 * m_copy(m, offset, ...) above. 281 * sbappendaddr() expects M_PKTHDR, 282 * and m_copy() will copy M_PKTHDR 283 * only if offset is 0. 284 */ 285 if (last->in6p_flags & IN6P_CONTROLOPTS) { 286 ip6_savecontrol(last, &opts, 287 ip6, n); 288 } 289 290 m_adj(m, off + sizeof(struct udphdr)); 291 if (sbappendaddr(&last->in6p_socket->so_rcv, 292 (struct sockaddr *)&udp_in6, 293 n, opts) == 0) { 294 m_freem(n); 295 if (opts) 296 m_freem(opts); 297 udp6stat.udp6s_fullsock++; 298 } else 299 sorwakeup(last->in6p_socket); 300 opts = 0; 301 } 302 } 303 last = in6p; 304 /* 305 * Don't look for additional matches if this one does 306 * not have either the SO_REUSEPORT or SO_REUSEADDR 307 * socket options set. This heuristic avoids searching 308 * through all pcbs in the common case of a non-shared 309 * port. It assumes that an application will never 310 * clear these options after setting them. 311 */ 312 if ((last->in6p_socket->so_options & 313 (SO_REUSEPORT|SO_REUSEADDR)) == 0) 314 break; 315 } 316 317 if (last == NULL) { 318 /* 319 * No matching pcb found; discard datagram. 320 * (No need to send an ICMP Port Unreachable 321 * for a broadcast or multicast datgram.) 322 */ 323 udp6stat.udp6s_noport++; 324 udp6stat.udp6s_noportmcast++; 325 goto bad; 326 } 327 #ifdef IPSEC 328 /* 329 * Check AH/ESP integrity. 330 */ 331 if (last != NULL && ipsec6_in_reject(m, last)) { 332 ipsec6stat.in_polvio++; 333 goto bad; 334 } 335 #endif /*IPSEC*/ 336 if (last->in6p_flags & IN6P_CONTROLOPTS) 337 ip6_savecontrol(last, &opts, ip6, m); 338 339 m_adj(m, off + sizeof(struct udphdr)); 340 if (sbappendaddr(&last->in6p_socket->so_rcv, 341 (struct sockaddr *)&udp_in6, 342 m, opts) == 0) { 343 udp6stat.udp6s_fullsock++; 344 goto bad; 345 } 346 sorwakeup(last->in6p_socket); 347 return IPPROTO_DONE; 348 } 349 /* 350 * Locate pcb for datagram. 351 */ 352 in6p = udp6_last_in6pcb; 353 if (in6p->in6p_lport != uh->uh_dport || 354 in6p->in6p_fport != uh->uh_sport || 355 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, &ip6->ip6_src) || 356 !IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &ip6->ip6_dst)) { 357 in6p = in6_pcblookup(&udb6, 358 &ip6->ip6_src, uh->uh_sport, 359 &ip6->ip6_dst, uh->uh_dport, 360 IN6PLOOKUP_WILDCARD); 361 if (in6p) 362 udp6_last_in6pcb = in6p; 363 udp6stat.udp6ps_pcbcachemiss++; 364 } 365 if (in6p == 0) { 366 udp6stat.udp6s_noport++; 367 if (m->m_flags & M_MCAST) { 368 printf("UDP6: M_MCAST is set in a unicast packet.\n"); 369 udp6stat.udp6s_noportmcast++; 370 goto bad; 371 } 372 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0); 373 return IPPROTO_DONE; 374 } 375 #ifdef IPSEC 376 /* 377 * Check AH/ESP integrity. 378 */ 379 if (in6p != NULL && ipsec6_in_reject(m, in6p)) { 380 ipsec6stat.in_polvio++; 381 goto bad; 382 } 383 #endif /*IPSEC*/ 384 385 /* 386 * Construct sockaddr format source address. 387 * Stuff source address and datagram in user buffer. 388 */ 389 bzero(&udp_in6, sizeof(udp_in6)); 390 udp_in6.sin6_len = sizeof(struct sockaddr_in6); 391 udp_in6.sin6_family = AF_INET6; 392 udp_in6.sin6_port = uh->uh_sport; 393 udp_in6.sin6_addr = ip6->ip6_src; 394 if (IN6_IS_SCOPE_LINKLOCAL(&udp_in6.sin6_addr)) 395 udp_in6.sin6_addr.s6_addr16[1] = 0; 396 if (m->m_pkthdr.rcvif) { 397 if (IN6_IS_SCOPE_LINKLOCAL(&udp_in6.sin6_addr)) 398 udp_in6.sin6_scope_id = m->m_pkthdr.rcvif->if_index; 399 else 400 udp_in6.sin6_scope_id = 0; 401 } else 402 udp_in6.sin6_scope_id = 0; 403 if (in6p->in6p_flags & IN6P_CONTROLOPTS) 404 ip6_savecontrol(in6p, &opts, ip6, m); 405 406 m_adj(m, off + sizeof(struct udphdr)); 407 if (sbappendaddr(&in6p->in6p_socket->so_rcv, 408 (struct sockaddr *)&udp_in6, 409 m, opts) == 0) { 410 udp6stat.udp6s_fullsock++; 411 goto bad; 412 } 413 sorwakeup(in6p->in6p_socket); 414 return IPPROTO_DONE; 415 bad: 416 if (m) 417 m_freem(m); 418 if (opts) 419 m_freem(opts); 420 return IPPROTO_DONE; 421 } 422 423 /* 424 * Notify a udp user of an asynchronous error; 425 * just wake up so tat he can collect error status. 426 */ 427 static void 428 udp6_notify(in6p, errno) 429 register struct in6pcb *in6p; 430 int errno; 431 { 432 in6p->in6p_socket->so_error = errno; 433 sorwakeup(in6p->in6p_socket); 434 sowwakeup(in6p->in6p_socket); 435 } 436 437 void 438 udp6_ctlinput(cmd, sa, ip6, m, off) 439 int cmd; 440 struct sockaddr *sa; 441 register struct ip6_hdr *ip6; 442 struct mbuf *m; 443 int off; 444 { 445 register struct udphdr *uhp; 446 struct udphdr uh; 447 448 #if 0 449 if (cmd == PRC_IFNEWADDR) 450 in6_mrejoin(&udb6); 451 else 452 #endif 453 if (!PRC_IS_REDIRECT(cmd) && 454 ((unsigned)cmd >= PRC_NCMDS || inet6ctlerrmap[cmd] == 0)) 455 return; 456 if (ip6) { 457 /* 458 * XXX: We assume that when IPV6 is non NULL, 459 * M and OFF are valid. 460 */ 461 if (m->m_len < off + sizeof(uh)) { 462 /* 463 * this should be rare case, 464 * so we compromise on this copy... 465 */ 466 m_copydata(m, off, sizeof(uh), (caddr_t)&uh); 467 uhp = &uh; 468 } else 469 uhp = (struct udphdr *)(mtod(m, caddr_t) + off); 470 (void) in6_pcbnotify(&udb6, sa, uhp->uh_dport, &ip6->ip6_src, 471 uhp->uh_sport, cmd, udp6_notify); 472 } else { 473 (void) in6_pcbnotify(&udb6, sa, 0, &zeroin6_addr, 0, cmd, 474 udp6_notify); 475 } 476 } 477 478 int 479 udp6_output(in6p, m, addr6, control) 480 register struct in6pcb *in6p; 481 register struct mbuf *m; 482 struct mbuf *addr6, *control; 483 { 484 register int ulen = m->m_pkthdr.len; 485 int plen = sizeof(struct udphdr) + ulen; 486 struct ip6_hdr *ip6; 487 struct udphdr *udp6; 488 struct in6_addr laddr6; 489 int s = 0, error = 0; 490 struct ip6_pktopts opt, *stickyopt = in6p->in6p_outputopts; 491 int priv = 0; 492 struct proc *p = curproc; /* XXX */ 493 494 if (p && !suser(p->p_ucred, &p->p_acflag)) 495 priv = 1; 496 if (control) { 497 if ((error = ip6_setpktoptions(control, &opt, priv)) != 0) 498 goto release; 499 in6p->in6p_outputopts = &opt; 500 } 501 502 if (addr6) { 503 laddr6 = in6p->in6p_laddr; 504 if (!IN6_IS_ADDR_ANY(&in6p->in6p_faddr)) { 505 error = EISCONN; 506 goto release; 507 } 508 /* 509 * Must block input while temporarily connected. 510 */ 511 s = splsoftnet(); 512 error = in6_pcbconnect(in6p, addr6); 513 if (error) { 514 splx(s); 515 goto release; 516 } 517 } else { 518 if (IN6_IS_ADDR_ANY(&in6p->in6p_faddr)) { 519 error = ENOTCONN; 520 goto release; 521 } 522 } 523 /* 524 * Calculate data length and get a mbuf 525 * for UDP and IP6 headers. 526 */ 527 M_PREPEND(m, sizeof(struct ip6_hdr) + sizeof(struct udphdr), M_DONTWAIT); 528 if (m == 0) { 529 error = ENOBUFS; 530 goto release; 531 } 532 533 /* 534 * Stuff checksum and output datagram. 535 */ 536 ip6 = mtod(m, struct ip6_hdr *); 537 ip6->ip6_flow = in6p->in6p_flowinfo & IPV6_FLOWINFO_MASK; 538 ip6->ip6_vfc = IPV6_VERSION; 539 #if 0 /* ip6_plen will be filled in ip6_output. */ 540 ip6->ip6_plen = htons((u_short)plen); 541 #endif 542 ip6->ip6_nxt = IPPROTO_UDP; 543 ip6->ip6_hlim = in6p->in6p_ip6.ip6_hlim; /* XXX */ 544 ip6->ip6_src = in6p->in6p_laddr; 545 ip6->ip6_dst = in6p->in6p_faddr; 546 547 udp6 = (struct udphdr *)(ip6 + 1); 548 udp6->uh_sport = in6p->in6p_lport; 549 udp6->uh_dport = in6p->in6p_fport; 550 udp6->uh_ulen = htons((u_short)plen); 551 udp6->uh_sum = 0; 552 553 if ((udp6->uh_sum = in6_cksum(m, IPPROTO_UDP, 554 sizeof(struct ip6_hdr), plen)) == 0) { 555 udp6->uh_sum = 0xffff; 556 } 557 558 udp6stat.udp6s_opackets++; 559 560 #ifdef IPSEC 561 m->m_pkthdr.rcvif = (struct ifnet *)in6p->in6p_socket; 562 #endif /*IPSEC*/ 563 error = ip6_output(m, in6p->in6p_outputopts, &in6p->in6p_route, 564 0, in6p->in6p_moptions); 565 566 if (addr6) { 567 in6_pcbdisconnect(in6p); 568 in6p->in6p_laddr = laddr6; 569 splx(s); 570 } 571 goto releaseopt; 572 573 release: 574 m_freem(m); 575 576 releaseopt: 577 if (control) { 578 in6p->in6p_outputopts = stickyopt; 579 m_freem(control); 580 } 581 return(error); 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 (in6p == NULL && req != PRU_ATTACH) { 613 error = EINVAL; 614 goto release; 615 } 616 617 switch (req) { 618 case PRU_ATTACH: 619 /* 620 * MAPPED_ADDR implementation spec: 621 * Always attach for IPv6, 622 * and only when necessary for IPv4. 623 */ 624 if (in6p != NULL) { 625 error = EINVAL; 626 break; 627 } 628 s = splsoftnet(); 629 error = in6_pcballoc(so, &udb6); 630 splx(s); 631 if (error) 632 break; 633 error = soreserve(so, udp6_sendspace, udp6_recvspace); 634 if (error) 635 break; 636 in6p = sotoin6pcb(so); 637 in6p->in6p_ip6.ip6_hlim = ip6_defhlim; 638 in6p->in6p_cksum = -1; /* just to be sure */ 639 #ifdef IPSEC 640 error = ipsec_init_policy(&in6p->in6p_sp); 641 #endif /*IPSEC*/ 642 break; 643 644 case PRU_DETACH: 645 udp6_detach(in6p); 646 break; 647 648 case PRU_BIND: 649 s = splsoftnet(); 650 error = in6_pcbbind(in6p, addr6); 651 splx(s); 652 break; 653 654 case PRU_LISTEN: 655 error = EOPNOTSUPP; 656 break; 657 658 case PRU_CONNECT: 659 if (!IN6_IS_ADDR_ANY(&in6p->in6p_faddr)) { 660 error = EISCONN; 661 break; 662 } 663 s = splsoftnet(); 664 error = in6_pcbconnect(in6p, addr6); 665 if (ip6_auto_flowlabel) { 666 in6p->in6p_flowinfo &= ~IPV6_FLOWLABEL_MASK; 667 in6p->in6p_flowinfo |= 668 (htonl(ip6_flow_seq++) & IPV6_FLOWLABEL_MASK); 669 } 670 splx(s); 671 if (error == 0) 672 soisconnected(so); 673 break; 674 675 case PRU_CONNECT2: 676 error = EOPNOTSUPP; 677 break; 678 679 case PRU_ACCEPT: 680 error = EOPNOTSUPP; 681 break; 682 683 case PRU_DISCONNECT: 684 if (IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 685 error = ENOTCONN; 686 break; 687 } 688 s = splsoftnet(); 689 in6_pcbdisconnect(in6p); 690 bzero((caddr_t)&in6p->in6p_laddr, sizeof(in6p->in6p_laddr)); 691 splx(s); 692 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 693 break; 694 695 case PRU_SHUTDOWN: 696 socantsendmore(so); 697 break; 698 699 case PRU_SEND: 700 return(udp6_output(in6p, m, addr6, control)); 701 702 case PRU_ABORT: 703 soisdisconnected(so); 704 udp6_detach(in6p); 705 break; 706 707 case PRU_SOCKADDR: 708 in6_setsockaddr(in6p, addr6); 709 break; 710 711 case PRU_PEERADDR: 712 in6_setpeeraddr(in6p, addr6); 713 break; 714 715 case PRU_SENSE: 716 /* 717 * stat: don't bother with a blocksize 718 */ 719 return(0); 720 721 case PRU_SENDOOB: 722 case PRU_FASTTIMO: 723 case PRU_SLOWTIMO: 724 case PRU_PROTORCV: 725 case PRU_PROTOSEND: 726 error = EOPNOTSUPP; 727 break; 728 729 case PRU_RCVD: 730 case PRU_RCVOOB: 731 return(EOPNOTSUPP); /* do not free mbuf's */ 732 733 default: 734 panic("udp6_usrreq"); 735 } 736 737 release: 738 if (control) { 739 printf("udp control data unexpectedly retained\n"); 740 m_freem(control); 741 } 742 if (m) 743 m_freem(m); 744 return(error); 745 } 746 747 static void 748 udp6_detach(in6p) 749 struct in6pcb *in6p; 750 { 751 int s = splsoftnet(); 752 753 if (in6p == udp6_last_in6pcb) 754 udp6_last_in6pcb = &udb6; 755 in6_pcbdetach(in6p); 756 splx(s); 757 } 758 759 #ifdef __bsdi__ 760 int *udp6_sysvars[] = UDP6CTL_VARS; 761 762 int 763 udp6_sysctl(name, namelen, oldp, oldlenp, newp, newlen) 764 int *name; 765 u_int namelen; 766 void *oldp; 767 size_t *oldlenp; 768 void *newp; 769 size_t newlen; 770 { 771 if (name[0] >= UDP6CTL_MAXID) 772 return (EOPNOTSUPP); 773 switch (name[0]) { 774 case UDP6CTL_STATS: 775 return sysctl_rdtrunc(oldp, oldlenp, newp, &udp6stat, 776 sizeof(udp6stat)); 777 778 default: 779 return (sysctl_int_arr(udp6_sysvars, name, namelen, 780 oldp, oldlenp, newp, newlen)); 781 } 782 } 783 #endif /*__bsdi__*/ 784 785 #ifdef __NetBSD__ 786 #include <vm/vm.h> 787 #include <sys/sysctl.h> 788 789 int 790 udp6_sysctl(name, namelen, oldp, oldlenp, newp, newlen) 791 int *name; 792 u_int namelen; 793 void *oldp; 794 size_t *oldlenp; 795 void *newp; 796 size_t newlen; 797 { 798 /* All sysctl names at this level are terminal. */ 799 if (namelen != 1) 800 return ENOTDIR; 801 802 switch (name[0]) { 803 804 case UDP6CTL_SENDMAX: 805 return sysctl_int(oldp, oldlenp, newp, newlen, 806 &udp6_sendspace); 807 case UDP6CTL_RECVSPACE: 808 return sysctl_int(oldp, oldlenp, newp, newlen, 809 &udp6_recvspace); 810 default: 811 return ENOPROTOOPT; 812 } 813 /* NOTREACHED */ 814 } 815 #endif 816
Indexes created Tue Sep 23 23:09:58 GMT 2025