udp_usrreq.c revision 1.63
1 /* $NetBSD: udp_usrreq.c,v 1.63 2000/03/01 12:49:42 itojun 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, 1988, 1990, 1993, 1995 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_usrreq.c 8.6 (Berkeley) 5/23/95 65 */ 66 67 #include "opt_ipsec.h" 68 69 #include "ipkdb.h" 70 71 #include <sys/param.h> 72 #include <sys/malloc.h> 73 #include <sys/mbuf.h> 74 #include <sys/protosw.h> 75 #include <sys/socket.h> 76 #include <sys/socketvar.h> 77 #include <sys/errno.h> 78 #include <sys/stat.h> 79 #include <sys/systm.h> 80 #include <sys/proc.h> 81 #include <sys/domain.h> 82 83 #include <vm/vm.h> 84 #include <sys/sysctl.h> 85 86 #include <net/if.h> 87 #include <net/route.h> 88 89 #include <netinet/in.h> 90 #include <netinet/in_systm.h> 91 #include <netinet/in_var.h> 92 #include <netinet/ip.h> 93 #include <netinet/in_pcb.h> 94 #include <netinet/ip_var.h> 95 #include <netinet/ip_icmp.h> 96 #include <netinet/udp.h> 97 #include <netinet/udp_var.h> 98 99 #ifdef INET6 100 #include <netinet/ip6.h> 101 #include <netinet/icmp6.h> 102 #include <netinet6/ip6_var.h> 103 #include <netinet6/in6_pcb.h> 104 #include <netinet6/udp6_var.h> 105 #endif 106 107 #ifdef PULLDOWN_TEST 108 #ifndef INET6 109 /* always need ip6.h for IP6_EXTHDR_GET */ 110 #include <netinet/ip6.h> 111 #endif 112 #endif 113 114 #include <machine/stdarg.h> 115 116 #ifdef IPSEC 117 #include <netinet6/ipsec.h> 118 #include <netkey/key.h> 119 #include <netkey/key_debug.h> 120 #endif /*IPSEC*/ 121 122 /* 123 * UDP protocol implementation. 124 * Per RFC 768, August, 1980. 125 */ 126 #ifndef COMPAT_42 127 int udpcksum = 1; 128 #else 129 int udpcksum = 0; /* XXX */ 130 #endif 131 132 static void udp4_sendup __P((struct mbuf *, int, struct sockaddr *, 133 struct socket *)); 134 static int udp4_realinput __P((struct sockaddr_in *, struct sockaddr_in *, 135 struct mbuf *, int)); 136 #ifdef INET6 137 static void udp6_sendup __P((struct mbuf *, int, struct sockaddr *, 138 struct socket *)); 139 static int in6_mcmatch __P((struct in6pcb *, struct in6_addr *, 140 struct ifnet *)); 141 static int udp6_realinput __P((int, struct sockaddr_in6 *, 142 struct sockaddr_in6 *, struct mbuf *, int)); 143 #endif 144 static void udp_notify __P((struct inpcb *, int)); 145 146 #ifndef UDBHASHSIZE 147 #define UDBHASHSIZE 128 148 #endif 149 int udbhashsize = UDBHASHSIZE; 150 151 void 152 udp_init() 153 { 154 155 in_pcbinit(&udbtable, udbhashsize, udbhashsize); 156 } 157 158 #ifndef UDP6 159 void 160 #if __STDC__ 161 udp_input(struct mbuf *m, ...) 162 #else 163 udp_input(m, va_alist) 164 struct mbuf *m; 165 va_dcl 166 #endif 167 { 168 va_list ap; 169 struct sockaddr_in src, dst; 170 struct ip *ip; 171 struct udphdr *uh; 172 int iphlen, proto; 173 int len; 174 int n; 175 176 va_start(ap, m); 177 iphlen = va_arg(ap, int); 178 proto = va_arg(ap, int); 179 va_end(ap); 180 181 udpstat.udps_ipackets++; 182 183 #ifndef PULLDOWN_TEST 184 /* 185 * Strip IP options, if any; should skip this, 186 * make available to user, and use on returned packets, 187 * but we don't yet have a way to check the checksum 188 * with options still present. 189 */ 190 if (iphlen > sizeof (struct ip)) { 191 ip_stripoptions(m, (struct mbuf *)0); 192 iphlen = sizeof(struct ip); 193 } 194 #else 195 /* 196 * we may enable the above code if we save and pass IPv4 options 197 * to the userland. 198 */ 199 #endif 200 201 /* 202 * Get IP and UDP header together in first mbuf. 203 */ 204 ip = mtod(m, struct ip *); 205 #ifndef PULLDOWN_TEST 206 if (m->m_len < iphlen + sizeof(struct udphdr)) { 207 if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) { 208 udpstat.udps_hdrops++; 209 return; 210 } 211 ip = mtod(m, struct ip *); 212 } 213 uh = (struct udphdr *)((caddr_t)ip + iphlen); 214 #else 215 IP6_EXTHDR_GET(uh, struct udphdr *, m, iphlen, sizeof(struct udphdr)); 216 if (uh == NULL) { 217 udpstat.udps_hdrops++; 218 return; 219 } 220 #endif 221 222 /* destination port of 0 is illegal, based on RFC768. */ 223 if (uh->uh_dport == 0) 224 goto bad; 225 226 /* 227 * Make mbuf data length reflect UDP length. 228 * If not enough data to reflect UDP length, drop. 229 */ 230 len = ntohs((u_int16_t)uh->uh_ulen); 231 if (ip->ip_len != iphlen + len) { 232 if (ip->ip_len < iphlen + len) { 233 udpstat.udps_badlen++; 234 goto bad; 235 } 236 m_adj(m, iphlen + len - ip->ip_len); 237 } 238 239 /* 240 * Checksum extended UDP header and data. 241 */ 242 if (uh->uh_sum) { 243 if (in4_cksum(m, IPPROTO_UDP, iphlen, len) != 0) { 244 udpstat.udps_badsum++; 245 m_freem(m); 246 return; 247 } 248 } 249 250 /* construct source and dst sockaddrs. */ 251 bzero(&src, sizeof(src)); 252 src.sin_family = AF_INET; 253 src.sin_len = sizeof(struct sockaddr_in); 254 bcopy(&ip->ip_src, &src.sin_addr, sizeof(src.sin_addr)); 255 src.sin_port = uh->uh_sport; 256 bzero(&dst, sizeof(dst)); 257 dst.sin_family = AF_INET; 258 dst.sin_len = sizeof(struct sockaddr_in); 259 bcopy(&ip->ip_dst, &dst.sin_addr, sizeof(dst.sin_addr)); 260 dst.sin_port = uh->uh_dport; 261 262 n = udp4_realinput(&src, &dst, m, iphlen); 263 #ifdef INET6 264 if (IN_MULTICAST(ip->ip_dst.s_addr) || n == 0) { 265 struct sockaddr_in6 src6, dst6; 266 267 bzero(&src6, sizeof(src6)); 268 src6.sin6_family = AF_INET6; 269 src6.sin6_len = sizeof(struct sockaddr_in6); 270 src6.sin6_addr.s6_addr[10] = src6.sin6_addr.s6_addr[11] = 0xff; 271 bcopy(&ip->ip_src, &src6.sin6_addr.s6_addr[12], 272 sizeof(ip->ip_src)); 273 src6.sin6_port = uh->uh_sport; 274 bzero(&dst6, sizeof(dst6)); 275 dst6.sin6_family = AF_INET6; 276 dst6.sin6_len = sizeof(struct sockaddr_in6); 277 dst6.sin6_addr.s6_addr[10] = dst6.sin6_addr.s6_addr[11] = 0xff; 278 bcopy(&ip->ip_dst, &dst6.sin6_addr.s6_addr[12], 279 sizeof(ip->ip_dst)); 280 dst6.sin6_port = uh->uh_dport; 281 282 n += udp6_realinput(AF_INET, &src6, &dst6, m, iphlen); 283 } 284 #endif 285 286 if (n == 0) { 287 if (m->m_flags & (M_BCAST | M_MCAST)) { 288 udpstat.udps_noportbcast++; 289 goto bad; 290 } 291 udpstat.udps_noport++; 292 #if NIPKDB > 0 293 if (checkipkdb(&ip->ip_src, uh->uh_sport, uh->uh_dport, 294 m, iphlen + sizeof(struct udphdr), 295 m->m_pkthdr.len - iphlen - sizeof(struct udphdr))) { 296 /* 297 * It was a debugger connect packet, 298 * just drop it now 299 */ 300 goto bad; 301 } 302 #endif 303 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0); 304 m = NULL; 305 } 306 307 bad: 308 if (m) 309 m_freem(m); 310 } 311 312 #ifdef INET6 313 int 314 udp6_input(mp, offp, proto) 315 struct mbuf **mp; 316 int *offp, proto; 317 { 318 struct mbuf *m = *mp; 319 int off = *offp; 320 struct sockaddr_in6 src, dst; 321 struct ip6_hdr *ip6; 322 struct udphdr *uh; 323 u_int32_t plen, ulen; 324 325 #if defined(NFAITH) && 0 < NFAITH 326 if (m->m_pkthdr.rcvif) { 327 if (m->m_pkthdr.rcvif->if_type == IFT_FAITH) { 328 /* send icmp6 host unreach? */ 329 m_freem(m); 330 return IPPROTO_DONE; 331 } 332 } 333 #endif 334 335 udp6stat.udp6s_ipackets++; 336 337 #ifndef PULLDOWN_TEST 338 IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE); 339 #endif 340 341 ip6 = mtod(m, struct ip6_hdr *); 342 /* check for jumbogram is done in ip6_input. we can trust pkthdr.len */ 343 plen = m->m_pkthdr.len - off; 344 #ifndef PULLDOWN_TEST 345 uh = (struct udphdr *)((caddr_t)ip6 + off); 346 #else 347 IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(struct udphdr)); 348 if (uh == NULL) { 349 ip6stat.ip6s_tooshort++; 350 return IPPROTO_DONE; 351 } 352 #endif 353 ulen = ntohs((u_short)uh->uh_ulen); 354 if (ulen == 0 && plen > 0xffff) 355 ulen = plen; 356 357 if (plen != ulen) { 358 udp6stat.udp6s_badlen++; 359 goto bad; 360 } 361 362 /* destination port of 0 is illegal, based on RFC768. */ 363 if (uh->uh_dport == 0) 364 goto bad; 365 366 /* Be proactive about malicious use of IPv4 mapped address */ 367 if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || 368 IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { 369 /* XXX stat */ 370 goto bad; 371 } 372 373 /* 374 * Checksum extended UDP header and data. 375 */ 376 if (uh->uh_sum == 0) 377 udp6stat.udp6s_nosum++; 378 else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) { 379 udp6stat.udp6s_badsum++; 380 goto bad; 381 } 382 383 /* 384 * Construct source and dst sockaddrs. 385 * Note that ifindex (s6_addr16[1]) is already filled. 386 */ 387 bzero(&src, sizeof(src)); 388 src.sin6_family = AF_INET6; 389 src.sin6_len = sizeof(struct sockaddr_in6); 390 bcopy(&ip6->ip6_src, &src.sin6_addr, sizeof(src.sin6_addr)); 391 if (IN6_IS_SCOPE_LINKLOCAL(&src.sin6_addr)) 392 src.sin6_addr.s6_addr16[1] = 0; 393 if (m->m_pkthdr.rcvif) { 394 if (IN6_IS_SCOPE_LINKLOCAL(&src.sin6_addr)) 395 src.sin6_scope_id = m->m_pkthdr.rcvif->if_index; 396 else 397 src.sin6_scope_id = 0; 398 } 399 src.sin6_port = uh->uh_sport; 400 bzero(&dst, sizeof(dst)); 401 dst.sin6_family = AF_INET6; 402 dst.sin6_len = sizeof(struct sockaddr_in6); 403 bcopy(&ip6->ip6_dst, &dst.sin6_addr, sizeof(dst.sin6_addr)); 404 if (IN6_IS_SCOPE_LINKLOCAL(&dst.sin6_addr)) 405 dst.sin6_addr.s6_addr16[1] = 0; 406 if (m->m_pkthdr.rcvif) { 407 if (IN6_IS_SCOPE_LINKLOCAL(&dst.sin6_addr)) 408 dst.sin6_scope_id = m->m_pkthdr.rcvif->if_index; 409 else 410 dst.sin6_scope_id = 0; 411 } 412 dst.sin6_port = uh->uh_dport; 413 414 if (udp6_realinput(AF_INET6, &src, &dst, m, off) == 0) { 415 if (m->m_flags & M_MCAST) { 416 udp6stat.udp6s_noportmcast++; 417 goto bad; 418 } 419 udp6stat.udp6s_noport++; 420 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0); 421 m = NULL; 422 } 423 424 bad: 425 if (m) 426 m_freem(m); 427 return IPPROTO_DONE; 428 } 429 #endif 430 431 static void 432 udp4_sendup(m, off, src, so) 433 struct mbuf *m; 434 int off; /* offset of data portion */ 435 struct sockaddr *src; 436 struct socket *so; 437 { 438 struct mbuf *opts = NULL; 439 struct mbuf *n; 440 struct inpcb *inp = NULL; 441 #ifdef INET6 442 struct in6pcb *in6p = NULL; 443 #endif 444 445 if (!so) 446 return; 447 switch (so->so_proto->pr_domain->dom_family) { 448 case AF_INET: 449 inp = sotoinpcb(so); 450 break; 451 #ifdef INET6 452 case AF_INET6: 453 in6p = sotoin6pcb(so); 454 break; 455 #endif 456 default: 457 return; 458 } 459 460 #ifdef IPSEC 461 /* check AH/ESP integrity. */ 462 if (so != NULL && ipsec4_in_reject_so(m, so)) { 463 ipsecstat.in_polvio++; 464 return; 465 } 466 #endif /*IPSEC*/ 467 468 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { 469 if (inp && (inp->inp_flags & INP_CONTROLOPTS 470 || so->so_options & SO_TIMESTAMP)) { 471 struct ip *ip = mtod(n, struct ip *); 472 ip_savecontrol(inp, &opts, ip, n); 473 } 474 475 m_adj(n, off); 476 if (sbappendaddr(&so->so_rcv, src, n, 477 opts) == 0) { 478 m_freem(n); 479 if (opts) 480 m_freem(opts); 481 } else 482 sorwakeup(so); 483 } 484 } 485 486 #ifdef INET6 487 static void 488 udp6_sendup(m, off, src, so) 489 struct mbuf *m; 490 int off; /* offset of data portion */ 491 struct sockaddr *src; 492 struct socket *so; 493 { 494 struct mbuf *opts = NULL; 495 struct mbuf *n; 496 struct in6pcb *in6p = NULL; 497 498 if (!so) 499 return; 500 if (so->so_proto->pr_domain->dom_family != AF_INET6) 501 return; 502 in6p = sotoin6pcb(so); 503 504 #ifdef IPSEC 505 /* check AH/ESP integrity. */ 506 if (so != NULL && ipsec6_in_reject_so(m, so)) { 507 ipsec6stat.in_polvio++; 508 return; 509 } 510 #endif /*IPSEC*/ 511 512 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { 513 if (in6p && (in6p->in6p_flags & IN6P_CONTROLOPTS 514 || in6p->in6p_socket->so_options & SO_TIMESTAMP)) { 515 struct ip6_hdr *ip6 = mtod(n, struct ip6_hdr *); 516 ip6_savecontrol(in6p, &opts, ip6, n); 517 } 518 519 m_adj(n, off); 520 if (sbappendaddr(&so->so_rcv, src, n, opts) == 0) { 521 m_freem(n); 522 if (opts) 523 m_freem(opts); 524 udp6stat.udp6s_fullsock++; 525 } else 526 sorwakeup(so); 527 } 528 } 529 #endif 530 531 static int 532 udp4_realinput(src, dst, m, off) 533 struct sockaddr_in *src; 534 struct sockaddr_in *dst; 535 struct mbuf *m; 536 int off; /* offset of udphdr */ 537 { 538 u_int16_t *sport, *dport; 539 int rcvcnt; 540 struct in_addr *src4, *dst4; 541 struct inpcb *inp; 542 543 rcvcnt = 0; 544 off += sizeof(struct udphdr); /* now, offset of payload */ 545 546 if (src->sin_family != AF_INET || dst->sin_family != AF_INET) 547 goto bad; 548 549 src4 = &src->sin_addr; 550 sport = &src->sin_port; 551 dst4 = &dst->sin_addr; 552 dport = &dst->sin_port; 553 554 if (IN_MULTICAST(src4->s_addr) || 555 in_broadcast(*dst4, m->m_pkthdr.rcvif)) { 556 struct inpcb *last; 557 /* 558 * Deliver a multicast or broadcast datagram to *all* sockets 559 * for which the local and remote addresses and ports match 560 * those of the incoming datagram. This allows more than 561 * one process to receive multi/broadcasts on the same port. 562 * (This really ought to be done for unicast datagrams as 563 * well, but that would cause problems with existing 564 * applications that open both address-specific sockets and 565 * a wildcard socket listening to the same port -- they would 566 * end up receiving duplicates of every unicast datagram. 567 * Those applications open the multiple sockets to overcome an 568 * inadequacy of the UDP socket interface, but for backwards 569 * compatibility we avoid the problem here rather than 570 * fixing the interface. Maybe 4.5BSD will remedy this?) 571 */ 572 573 /* 574 * KAME note: usually we drop udpiphdr from mbuf here. 575 * we need udpiphdr for iPsec processing so we do that later. 576 */ 577 /* 578 * Locate pcb(s) for datagram. 579 */ 580 for (inp = udbtable.inpt_queue.cqh_first; 581 inp != (struct inpcb *)&udbtable.inpt_queue; 582 inp = inp->inp_queue.cqe_next) { 583 if (inp->inp_lport != *dport) 584 continue; 585 if (!in_nullhost(inp->inp_laddr)) { 586 if (!in_hosteq(inp->inp_laddr, *dst4)) 587 continue; 588 } 589 if (!in_nullhost(inp->inp_faddr)) { 590 if (!in_hosteq(inp->inp_faddr, *src4) || 591 inp->inp_fport != *sport) 592 continue; 593 } 594 595 last = inp; 596 udp4_sendup(m, off, (struct sockaddr *)src, 597 inp->inp_socket); 598 rcvcnt++; 599 600 /* 601 * Don't look for additional matches if this one does 602 * not have either the SO_REUSEPORT or SO_REUSEADDR 603 * socket options set. This heuristic avoids searching 604 * through all pcbs in the common case of a non-shared 605 * port. It assumes that an application will never 606 * clear these options after setting them. 607 */ 608 if ((inp->inp_socket->so_options & 609 (SO_REUSEPORT|SO_REUSEADDR)) == 0) 610 break; 611 } 612 613 #if 0 614 if (last == NULL) { 615 /* 616 * No matching pcb found; discard datagram. 617 * (No need to send an ICMP Port Unreachable 618 * for a broadcast or multicast datgram.) 619 */ 620 udpstat.udps_noportbcast++; 621 goto bad; 622 } 623 #endif 624 } else { 625 /* 626 * Locate pcb for datagram. 627 */ 628 inp = in_pcblookup_connect(&udbtable, *src4, *sport, *dst4, *dport); 629 if (inp == 0) { 630 ++udpstat.udps_pcbhashmiss; 631 inp = in_pcblookup_bind(&udbtable, *dst4, *dport); 632 if (inp == 0) { 633 #if 0 634 struct mbuf *n; 635 636 if (m->m_flags & (M_BCAST | M_MCAST)) { 637 udpstat.udps_noportbcast++; 638 goto bad; 639 } 640 udpstat.udps_noport++; 641 #if NIPKDB > 0 642 if (checkipkdb(src4, *sport, *dport, m, off, 643 m->m_pkthdr.len - off)) { 644 /* 645 * It was a debugger connect packet, 646 * just drop it now 647 */ 648 goto bad; 649 } 650 #endif 651 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { 652 icmp_error(n, ICMP_UNREACH, 653 ICMP_UNREACH_PORT, 0, 0); 654 } 655 #endif 656 return rcvcnt; 657 } 658 } 659 660 udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket); 661 rcvcnt++; 662 } 663 664 bad: 665 return rcvcnt; 666 } 667 668 #ifdef INET6 669 static int 670 in6_mcmatch(in6p, ia6, ifp) 671 struct in6pcb *in6p; 672 register struct in6_addr *ia6; 673 struct ifnet *ifp; 674 { 675 struct ip6_moptions *im6o = in6p->in6p_moptions; 676 struct in6_multi_mship *imm; 677 678 if (im6o == NULL) 679 return 0; 680 681 for (imm = im6o->im6o_memberships.lh_first; imm != NULL; 682 imm = imm->i6mm_chain.le_next) { 683 if ((ifp == NULL || 684 imm->i6mm_maddr->in6m_ifp == ifp) && 685 IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr, 686 ia6)) 687 return 1; 688 } 689 return 0; 690 } 691 692 static int 693 udp6_realinput(af, src, dst, m, off) 694 int af; /* af on packet */ 695 struct sockaddr_in6 *src; 696 struct sockaddr_in6 *dst; 697 struct mbuf *m; 698 int off; /* offset of udphdr */ 699 { 700 u_int16_t *sport, *dport; 701 int rcvcnt; 702 struct in6_addr *src6, *dst6; 703 struct in_addr *src4; 704 struct in6pcb *in6p; 705 706 rcvcnt = 0; 707 off += sizeof(struct udphdr); /* now, offset of payload */ 708 709 if (af != AF_INET && af != AF_INET6) 710 goto bad; 711 if (src->sin6_family != AF_INET6 || dst->sin6_family != AF_INET6) 712 goto bad; 713 714 src6 = &src->sin6_addr; 715 sport = &src->sin6_port; 716 dst6 = &dst->sin6_addr; 717 dport = &dst->sin6_port; 718 src4 = (struct in_addr *)&src->sin6_addr.s6_addr32[12]; 719 720 if (IN6_IS_ADDR_MULTICAST(dst6) 721 || (af == AF_INET && IN_MULTICAST(src4->s_addr))) { 722 struct in6pcb *last; 723 /* 724 * Deliver a multicast or broadcast datagram to *all* sockets 725 * for which the local and remote addresses and ports match 726 * those of the incoming datagram. This allows more than 727 * one process to receive multi/broadcasts on the same port. 728 * (This really ought to be done for unicast datagrams as 729 * well, but that would cause problems with existing 730 * applications that open both address-specific sockets and 731 * a wildcard socket listening to the same port -- they would 732 * end up receiving duplicates of every unicast datagram. 733 * Those applications open the multiple sockets to overcome an 734 * inadequacy of the UDP socket interface, but for backwards 735 * compatibility we avoid the problem here rather than 736 * fixing the interface. Maybe 4.5BSD will remedy this?) 737 */ 738 739 /* 740 * KAME note: usually we drop udpiphdr from mbuf here. 741 * we need udpiphdr for iPsec processing so we do that later. 742 */ 743 /* 744 * Locate pcb(s) for datagram. 745 */ 746 for (in6p = udb6.in6p_next; in6p != &udb6; 747 in6p = in6p->in6p_next) { 748 if (in6p->in6p_lport != *dport) 749 continue; 750 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { 751 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, dst6) 752 && !in6_mcmatch(in6p, dst6, m->m_pkthdr.rcvif)) 753 continue; 754 } 755 #ifndef INET6_BINDV6ONLY 756 else { 757 if (IN6_IS_ADDR_V4MAPPED(dst6) 758 && (in6p->in6p_flags & IN6P_BINDV6ONLY)) 759 continue; 760 } 761 #endif 762 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 763 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, src6) 764 || in6p->in6p_fport != *sport) 765 continue; 766 } 767 #ifndef INET6_BINDV6ONLY 768 else { 769 if (IN6_IS_ADDR_V4MAPPED(src6) 770 && (in6p->in6p_flags & IN6P_BINDV6ONLY)) 771 continue; 772 } 773 #endif 774 775 last = in6p; 776 udp6_sendup(m, off, (struct sockaddr *)src, 777 in6p->in6p_socket); 778 rcvcnt++; 779 780 /* 781 * Don't look for additional matches if this one does 782 * not have either the SO_REUSEPORT or SO_REUSEADDR 783 * socket options set. This heuristic avoids searching 784 * through all pcbs in the common case of a non-shared 785 * port. It assumes that an application will never 786 * clear these options after setting them. 787 */ 788 if ((in6p->in6p_socket->so_options & 789 (SO_REUSEPORT|SO_REUSEADDR)) == 0) 790 break; 791 } 792 793 #if 0 794 if (last == NULL) { 795 /* 796 * No matching pcb found; discard datagram. 797 * (No need to send an ICMP Port Unreachable 798 * for a broadcast or multicast datgram.) 799 */ 800 switch (af) { 801 case AF_INET: 802 udpstat.udps_noportbcast++; 803 break; 804 case AF_INET6: 805 udp6stat.udp6s_noportmcast++; 806 break; 807 } 808 goto bad; 809 } 810 #endif 811 } else { 812 /* 813 * Locate pcb for datagram. 814 */ 815 in6p = in6_pcblookup_connect(&udb6, src6, *sport, 816 dst6, *dport, 0); 817 if (in6p == 0) { 818 ++udpstat.udps_pcbhashmiss; 819 in6p = in6_pcblookup_bind(&udb6, dst6, *dport, 0); 820 if (in6p == 0) { 821 #if 0 822 struct mbuf *n; 823 n = m_copy(m, 0, M_COPYALL); 824 switch (af) { 825 case AF_INET: 826 if (m->m_flags & (M_BCAST | M_MCAST)) { 827 udpstat.udps_noportbcast++; 828 goto bad; 829 } 830 udpstat.udps_noport++; 831 if (n != NULL) 832 icmp_error(n, ICMP_UNREACH, 833 ICMP_UNREACH_PORT, 0, 0); 834 break; 835 case AF_INET6: 836 if (m->m_flags & M_MCAST) { 837 udp6stat.udp6s_noportmcast++; 838 goto bad; 839 } 840 udp6stat.udp6s_noport++; 841 if (n != NULL) 842 icmp6_error(n, ICMP6_DST_UNREACH, 843 ICMP6_DST_UNREACH_NOPORT, 0); 844 break; 845 } 846 #endif 847 848 return rcvcnt; 849 } 850 } 851 852 udp6_sendup(m, off, (struct sockaddr *)src, in6p->in6p_socket); 853 rcvcnt++; 854 } 855 856 bad: 857 return rcvcnt; 858 } 859 #endif 860 861 #else /*UDP6*/ 862 863 void 864 #if __STDC__ 865 udp_input(struct mbuf *m, ...) 866 #else 867 udp_input(m, va_alist) 868 struct mbuf *m; 869 va_dcl 870 #endif 871 { 872 int proto; 873 register struct ip *ip; 874 register struct udphdr *uh; 875 register struct inpcb *inp; 876 struct mbuf *opts = 0; 877 int len; 878 struct ip save_ip; 879 int iphlen; 880 va_list ap; 881 struct sockaddr_in udpsrc; 882 struct sockaddr *sa; 883 884 va_start(ap, m); 885 iphlen = va_arg(ap, int); 886 proto = va_arg(ap, int); 887 va_end(ap); 888 889 udpstat.udps_ipackets++; 890 891 /* 892 * Strip IP options, if any; should skip this, 893 * make available to user, and use on returned packets, 894 * but we don't yet have a way to check the checksum 895 * with options still present. 896 */ 897 if (iphlen > sizeof (struct ip)) { 898 ip_stripoptions(m, (struct mbuf *)0); 899 iphlen = sizeof(struct ip); 900 } 901 902 /* 903 * Get IP and UDP header together in first mbuf. 904 */ 905 ip = mtod(m, struct ip *); 906 if (m->m_len < iphlen + sizeof(struct udphdr)) { 907 if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) { 908 udpstat.udps_hdrops++; 909 return; 910 } 911 ip = mtod(m, struct ip *); 912 } 913 uh = (struct udphdr *)((caddr_t)ip + iphlen); 914 915 /* destination port of 0 is illegal, based on RFC768. */ 916 if (uh->uh_dport == 0) 917 goto bad; 918 919 /* 920 * Make mbuf data length reflect UDP length. 921 * If not enough data to reflect UDP length, drop. 922 */ 923 len = ntohs((u_int16_t)uh->uh_ulen); 924 if (ip->ip_len != iphlen + len) { 925 if (ip->ip_len < iphlen + len) { 926 udpstat.udps_badlen++; 927 goto bad; 928 } 929 m_adj(m, iphlen + len - ip->ip_len); 930 } 931 /* 932 * Save a copy of the IP header in case we want restore it 933 * for sending an ICMP error message in response. 934 */ 935 save_ip = *ip; 936 937 /* 938 * Checksum extended UDP header and data. 939 */ 940 if (uh->uh_sum) { 941 bzero(((struct ipovly *)ip)->ih_x1, 942 sizeof ((struct ipovly *)ip)->ih_x1); 943 ((struct ipovly *)ip)->ih_len = uh->uh_ulen; 944 if (in_cksum(m, len + sizeof (struct ip)) != 0) { 945 udpstat.udps_badsum++; 946 m_freem(m); 947 return; 948 } 949 } 950 951 /* 952 * Construct sockaddr format source address. 953 */ 954 udpsrc.sin_family = AF_INET; 955 udpsrc.sin_len = sizeof(struct sockaddr_in); 956 udpsrc.sin_addr = ip->ip_src; 957 udpsrc.sin_port = uh->uh_sport; 958 bzero((caddr_t)udpsrc.sin_zero, sizeof(udpsrc.sin_zero)); 959 960 if (IN_MULTICAST(ip->ip_dst.s_addr) || 961 in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) { 962 struct inpcb *last; 963 /* 964 * Deliver a multicast or broadcast datagram to *all* sockets 965 * for which the local and remote addresses and ports match 966 * those of the incoming datagram. This allows more than 967 * one process to receive multi/broadcasts on the same port. 968 * (This really ought to be done for unicast datagrams as 969 * well, but that would cause problems with existing 970 * applications that open both address-specific sockets and 971 * a wildcard socket listening to the same port -- they would 972 * end up receiving duplicates of every unicast datagram. 973 * Those applications open the multiple sockets to overcome an 974 * inadequacy of the UDP socket interface, but for backwards 975 * compatibility we avoid the problem here rather than 976 * fixing the interface. Maybe 4.5BSD will remedy this?) 977 */ 978 979 iphlen += sizeof(struct udphdr); 980 /* 981 * KAME note: usually we drop udpiphdr from mbuf here. 982 * we need udpiphdr for iPsec processing so we do that later. 983 */ 984 /* 985 * Locate pcb(s) for datagram. 986 * (Algorithm copied from raw_intr().) 987 */ 988 last = NULL; 989 for (inp = udbtable.inpt_queue.cqh_first; 990 inp != (struct inpcb *)&udbtable.inpt_queue; 991 inp = inp->inp_queue.cqe_next) { 992 if (inp->inp_lport != uh->uh_dport) 993 continue; 994 if (!in_nullhost(inp->inp_laddr)) { 995 if (!in_hosteq(inp->inp_laddr, ip->ip_dst)) 996 continue; 997 } 998 if (!in_nullhost(inp->inp_faddr)) { 999 if (!in_hosteq(inp->inp_faddr, ip->ip_src) || 1000 inp->inp_fport != uh->uh_sport) 1001 continue; 1002 } 1003 1004 if (last != NULL) { 1005 struct mbuf *n; 1006 1007 #ifdef IPSEC 1008 /* check AH/ESP integrity. */ 1009 if (last != NULL && ipsec4_in_reject(m, last)) { 1010 ipsecstat.in_polvio++; 1011 /* do not inject data to pcb */ 1012 } else 1013 #endif /*IPSEC*/ 1014 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { 1015 if (last->inp_flags & INP_CONTROLOPTS 1016 || last->inp_socket->so_options & 1017 SO_TIMESTAMP) { 1018 ip_savecontrol(last, &opts, 1019 ip, n); 1020 } 1021 m_adj(n, iphlen); 1022 sa = (struct sockaddr *)&udpsrc; 1023 if (sbappendaddr( 1024 &last->inp_socket->so_rcv, 1025 sa, n, opts) == 0) { 1026 m_freem(n); 1027 if (opts) 1028 m_freem(opts); 1029 } else 1030 sorwakeup(last->inp_socket); 1031 opts = 0; 1032 } 1033 } 1034 last = inp; 1035 /* 1036 * Don't look for additional matches if this one does 1037 * not have either the SO_REUSEPORT or SO_REUSEADDR 1038 * socket options set. This heuristic avoids searching 1039 * through all pcbs in the common case of a non-shared 1040 * port. It * assumes that an application will never 1041 * clear these options after setting them. 1042 */ 1043 if ((last->inp_socket->so_options & 1044 (SO_REUSEPORT|SO_REUSEADDR)) == 0) 1045 break; 1046 } 1047 1048 if (last == NULL) { 1049 /* 1050 * No matching pcb found; discard datagram. 1051 * (No need to send an ICMP Port Unreachable 1052 * for a broadcast or multicast datgram.) 1053 */ 1054 udpstat.udps_noportbcast++; 1055 goto bad; 1056 } 1057 #ifdef IPSEC 1058 /* check AH/ESP integrity. */ 1059 if (last != NULL && ipsec4_in_reject(m, last)) { 1060 ipsecstat.in_polvio++; 1061 goto bad; 1062 } 1063 #endif /*IPSEC*/ 1064 if (last->inp_flags & INP_CONTROLOPTS || 1065 last->inp_socket->so_options & SO_TIMESTAMP) 1066 ip_savecontrol(last, &opts, ip, m); 1067 m->m_len -= iphlen; 1068 m->m_pkthdr.len -= iphlen; 1069 m->m_data += iphlen; 1070 sa = (struct sockaddr *)&udpsrc; 1071 if (sbappendaddr(&last->inp_socket->so_rcv, sa, m, opts) == 0) { 1072 udpstat.udps_fullsock++; 1073 goto bad; 1074 } 1075 sorwakeup(last->inp_socket); 1076 return; 1077 } 1078 /* 1079 * Locate pcb for datagram. 1080 */ 1081 inp = in_pcblookup_connect(&udbtable, ip->ip_src, uh->uh_sport, 1082 ip->ip_dst, uh->uh_dport); 1083 if (inp == 0) { 1084 ++udpstat.udps_pcbhashmiss; 1085 inp = in_pcblookup_bind(&udbtable, ip->ip_dst, uh->uh_dport); 1086 if (inp == 0) { 1087 if (m->m_flags & (M_BCAST | M_MCAST)) { 1088 udpstat.udps_noportbcast++; 1089 goto bad; 1090 } 1091 udpstat.udps_noport++; 1092 *ip = save_ip; 1093 #if NIPKDB > 0 1094 if (checkipkdb(&ip->ip_src, 1095 uh->uh_sport, 1096 uh->uh_dport, 1097 m, 1098 iphlen + sizeof(struct udphdr), 1099 len - sizeof(struct udphdr))) 1100 /* It was a debugger connect packet, just drop it now */ 1101 goto bad; 1102 #endif 1103 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0); 1104 return; 1105 } 1106 } 1107 #ifdef IPSEC 1108 if (inp != NULL && ipsec4_in_reject(m, inp)) { 1109 ipsecstat.in_polvio++; 1110 goto bad; 1111 } 1112 #endif /*IPSEC*/ 1113 1114 /* 1115 * Stuff source address and datagram in user buffer. 1116 */ 1117 if (inp->inp_flags & INP_CONTROLOPTS || 1118 inp->inp_socket->so_options & SO_TIMESTAMP) 1119 ip_savecontrol(inp, &opts, ip, m); 1120 iphlen += sizeof(struct udphdr); 1121 m->m_len -= iphlen; 1122 m->m_pkthdr.len -= iphlen; 1123 m->m_data += iphlen; 1124 sa = (struct sockaddr *)&udpsrc; 1125 if (sbappendaddr(&inp->inp_socket->so_rcv, sa, m, opts) == 0) { 1126 udpstat.udps_fullsock++; 1127 goto bad; 1128 } 1129 sorwakeup(inp->inp_socket); 1130 return; 1131 bad: 1132 m_freem(m); 1133 if (opts) 1134 m_freem(opts); 1135 } 1136 #endif /*UDP6*/ 1137 1138 /* 1139 * Notify a udp user of an asynchronous error; 1140 * just wake up so that he can collect error status. 1141 */ 1142 static void 1143 udp_notify(inp, errno) 1144 register struct inpcb *inp; 1145 int errno; 1146 { 1147 1148 inp->inp_socket->so_error = errno; 1149 sorwakeup(inp->inp_socket); 1150 sowwakeup(inp->inp_socket); 1151 } 1152 1153 void * 1154 udp_ctlinput(cmd, sa, v) 1155 int cmd; 1156 struct sockaddr *sa; 1157 void *v; 1158 { 1159 register struct ip *ip = v; 1160 register struct udphdr *uh; 1161 extern int inetctlerrmap[]; 1162 void (*notify) __P((struct inpcb *, int)) = udp_notify; 1163 int errno; 1164 1165 if (sa->sa_family != AF_INET 1166 || sa->sa_len != sizeof(struct sockaddr_in)) 1167 return NULL; 1168 if ((unsigned)cmd >= PRC_NCMDS) 1169 return NULL; 1170 errno = inetctlerrmap[cmd]; 1171 if (PRC_IS_REDIRECT(cmd)) 1172 notify = in_rtchange, ip = 0; 1173 else if (cmd == PRC_HOSTDEAD) 1174 ip = 0; 1175 else if (errno == 0) 1176 return NULL; 1177 if (ip) { 1178 uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2)); 1179 in_pcbnotify(&udbtable, satosin(sa)->sin_addr, uh->uh_dport, 1180 ip->ip_src, uh->uh_sport, errno, notify); 1181 1182 /* XXX mapped address case */ 1183 } else 1184 in_pcbnotifyall(&udbtable, satosin(sa)->sin_addr, errno, 1185 notify); 1186 return NULL; 1187 } 1188 1189 int 1190 #if __STDC__ 1191 udp_output(struct mbuf *m, ...) 1192 #else 1193 udp_output(m, va_alist) 1194 struct mbuf *m; 1195 va_dcl 1196 #endif 1197 { 1198 register struct inpcb *inp; 1199 register struct udpiphdr *ui; 1200 register int len = m->m_pkthdr.len; 1201 int error = 0; 1202 va_list ap; 1203 1204 va_start(ap, m); 1205 inp = va_arg(ap, struct inpcb *); 1206 va_end(ap); 1207 1208 /* 1209 * Calculate data length and get a mbuf 1210 * for UDP and IP headers. 1211 */ 1212 M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT); 1213 if (m == 0) { 1214 error = ENOBUFS; 1215 goto release; 1216 } 1217 1218 /* 1219 * Compute the packet length of the IP header, and 1220 * punt if the length looks bogus. 1221 */ 1222 if ((len + sizeof(struct udpiphdr)) > IP_MAXPACKET) { 1223 error = EMSGSIZE; 1224 goto release; 1225 } 1226 1227 /* 1228 * Fill in mbuf with extended UDP header 1229 * and addresses and length put into network format. 1230 */ 1231 ui = mtod(m, struct udpiphdr *); 1232 bzero(ui->ui_x1, sizeof ui->ui_x1); 1233 ui->ui_pr = IPPROTO_UDP; 1234 ui->ui_len = htons((u_int16_t)len + sizeof (struct udphdr)); 1235 ui->ui_src = inp->inp_laddr; 1236 ui->ui_dst = inp->inp_faddr; 1237 ui->ui_sport = inp->inp_lport; 1238 ui->ui_dport = inp->inp_fport; 1239 ui->ui_ulen = ui->ui_len; 1240 1241 /* 1242 * Stuff checksum and output datagram. 1243 */ 1244 ui->ui_sum = 0; 1245 if (udpcksum) { 1246 if ((ui->ui_sum = in_cksum(m, sizeof (struct udpiphdr) + len)) == 0) 1247 ui->ui_sum = 0xffff; 1248 } 1249 ((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len; 1250 ((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */ 1251 ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */ 1252 udpstat.udps_opackets++; 1253 1254 #ifdef IPSEC 1255 ipsec_setsocket(m, inp->inp_socket); 1256 #endif /*IPSEC*/ 1257 1258 return (ip_output(m, inp->inp_options, &inp->inp_route, 1259 inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST), 1260 inp->inp_moptions)); 1261 1262 release: 1263 m_freem(m); 1264 return (error); 1265 } 1266 1267 int udp_sendspace = 9216; /* really max datagram size */ 1268 int udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in)); 1269 /* 40 1K datagrams */ 1270 1271 /*ARGSUSED*/ 1272 int 1273 udp_usrreq(so, req, m, nam, control, p) 1274 struct socket *so; 1275 int req; 1276 struct mbuf *m, *nam, *control; 1277 struct proc *p; 1278 { 1279 register struct inpcb *inp; 1280 int s; 1281 register int error = 0; 1282 1283 if (req == PRU_CONTROL) 1284 return (in_control(so, (long)m, (caddr_t)nam, 1285 (struct ifnet *)control, p)); 1286 1287 if (req == PRU_PURGEIF) { 1288 in_purgeif((struct ifnet *)control); 1289 in_pcbpurgeif(&udbtable, (struct ifnet *)control); 1290 return (0); 1291 } 1292 1293 s = splsoftnet(); 1294 inp = sotoinpcb(so); 1295 #ifdef DIAGNOSTIC 1296 if (req != PRU_SEND && req != PRU_SENDOOB && control) 1297 panic("udp_usrreq: unexpected control mbuf"); 1298 #endif 1299 if (inp == 0 && req != PRU_ATTACH) { 1300 error = EINVAL; 1301 goto release; 1302 } 1303 1304 /* 1305 * Note: need to block udp_input while changing 1306 * the udp pcb queue and/or pcb addresses. 1307 */ 1308 switch (req) { 1309 1310 case PRU_ATTACH: 1311 if (inp != 0) { 1312 error = EISCONN; 1313 break; 1314 } 1315 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 1316 error = soreserve(so, udp_sendspace, udp_recvspace); 1317 if (error) 1318 break; 1319 } 1320 error = in_pcballoc(so, &udbtable); 1321 if (error) 1322 break; 1323 inp = sotoinpcb(so); 1324 inp->inp_ip.ip_ttl = ip_defttl; 1325 #ifdef IPSEC 1326 error = ipsec_init_policy(so, &inp->inp_sp); 1327 if (error != 0) { 1328 in_pcbdetach(inp); 1329 break; 1330 } 1331 #endif /*IPSEC*/ 1332 break; 1333 1334 case PRU_DETACH: 1335 in_pcbdetach(inp); 1336 break; 1337 1338 case PRU_BIND: 1339 error = in_pcbbind(inp, nam, p); 1340 break; 1341 1342 case PRU_LISTEN: 1343 error = EOPNOTSUPP; 1344 break; 1345 1346 case PRU_CONNECT: 1347 error = in_pcbconnect(inp, nam); 1348 if (error) 1349 break; 1350 soisconnected(so); 1351 break; 1352 1353 case PRU_CONNECT2: 1354 error = EOPNOTSUPP; 1355 break; 1356 1357 case PRU_DISCONNECT: 1358 /*soisdisconnected(so);*/ 1359 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 1360 in_pcbdisconnect(inp); 1361 inp->inp_laddr = zeroin_addr; /* XXX */ 1362 in_pcbstate(inp, INP_BOUND); /* XXX */ 1363 break; 1364 1365 case PRU_SHUTDOWN: 1366 socantsendmore(so); 1367 break; 1368 1369 case PRU_RCVD: 1370 error = EOPNOTSUPP; 1371 break; 1372 1373 case PRU_SEND: 1374 if (control && control->m_len) { 1375 m_freem(control); 1376 m_freem(m); 1377 error = EINVAL; 1378 break; 1379 } 1380 { 1381 struct in_addr laddr; /* XXX */ 1382 1383 if (nam) { 1384 laddr = inp->inp_laddr; /* XXX */ 1385 if ((so->so_state & SS_ISCONNECTED) != 0) { 1386 error = EISCONN; 1387 goto die; 1388 } 1389 error = in_pcbconnect(inp, nam); 1390 if (error) { 1391 die: 1392 m_freem(m); 1393 break; 1394 } 1395 } else { 1396 if ((so->so_state & SS_ISCONNECTED) == 0) { 1397 error = ENOTCONN; 1398 goto die; 1399 } 1400 } 1401 error = udp_output(m, inp); 1402 if (nam) { 1403 in_pcbdisconnect(inp); 1404 inp->inp_laddr = laddr; /* XXX */ 1405 in_pcbstate(inp, INP_BOUND); /* XXX */ 1406 } 1407 } 1408 break; 1409 1410 case PRU_SENSE: 1411 /* 1412 * stat: don't bother with a blocksize. 1413 */ 1414 splx(s); 1415 return (0); 1416 1417 case PRU_RCVOOB: 1418 error = EOPNOTSUPP; 1419 break; 1420 1421 case PRU_SENDOOB: 1422 m_freem(control); 1423 m_freem(m); 1424 error = EOPNOTSUPP; 1425 break; 1426 1427 case PRU_SOCKADDR: 1428 in_setsockaddr(inp, nam); 1429 break; 1430 1431 case PRU_PEERADDR: 1432 in_setpeeraddr(inp, nam); 1433 break; 1434 1435 default: 1436 panic("udp_usrreq"); 1437 } 1438 1439 release: 1440 splx(s); 1441 return (error); 1442 } 1443 1444 /* 1445 * Sysctl for udp variables. 1446 */ 1447 int 1448 udp_sysctl(name, namelen, oldp, oldlenp, newp, newlen) 1449 int *name; 1450 u_int namelen; 1451 void *oldp; 1452 size_t *oldlenp; 1453 void *newp; 1454 size_t newlen; 1455 { 1456 /* All sysctl names at this level are terminal. */ 1457 if (namelen != 1) 1458 return (ENOTDIR); 1459 1460 switch (name[0]) { 1461 case UDPCTL_CHECKSUM: 1462 return (sysctl_int(oldp, oldlenp, newp, newlen, &udpcksum)); 1463 case UDPCTL_SENDSPACE: 1464 return (sysctl_int(oldp, oldlenp, newp, newlen, 1465 &udp_sendspace)); 1466 case UDPCTL_RECVSPACE: 1467 return (sysctl_int(oldp, oldlenp, newp, newlen, 1468 &udp_recvspace)); 1469 default: 1470 return (ENOPROTOOPT); 1471 } 1472 /* NOTREACHED */ 1473 } 1474
Indexes created Thu Sep 25 08:09:54 GMT 2025