udp_usrreq.c revision 1.66.4.6
1 /* $NetBSD: udp_usrreq.c,v 1.66.4.6 2004/04/12 04:58:25 jmc 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 #include "opt_ipkdb.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/domain.h> 81 82 #include <vm/vm.h> 83 #include <sys/sysctl.h> 84 85 #include <net/if.h> 86 #include <net/route.h> 87 88 #include <netinet/in.h> 89 #include <netinet/in_systm.h> 90 #include <netinet/in_var.h> 91 #include <netinet/ip.h> 92 #include <netinet/in_pcb.h> 93 #include <netinet/ip_var.h> 94 #include <netinet/ip_icmp.h> 95 #include <netinet/udp.h> 96 #include <netinet/udp_var.h> 97 98 #ifdef INET6 99 #include <netinet/ip6.h> 100 #include <netinet/icmp6.h> 101 #include <netinet6/ip6_var.h> 102 #include <netinet6/in6_pcb.h> 103 #include <netinet6/udp6_var.h> 104 #endif 105 106 #ifdef PULLDOWN_TEST 107 #ifndef INET6 108 /* always need ip6.h for IP6_EXTHDR_GET */ 109 #include <netinet/ip6.h> 110 #endif 111 #endif 112 113 #include "faith.h" 114 #if defined(NFAITH) && NFAITH > 0 115 #include <net/if_faith.h> 116 #endif 117 118 #include <machine/stdarg.h> 119 120 #ifdef IPSEC 121 #include <netinet6/ipsec.h> 122 #include <netkey/key.h> 123 #include <netkey/key_debug.h> 124 #endif /*IPSEC*/ 125 126 #ifdef IPKDB 127 #include <ipkdb/ipkdb.h> 128 #endif 129 130 /* 131 * UDP protocol implementation. 132 * Per RFC 768, August, 1980. 133 */ 134 #ifndef COMPAT_42 135 int udpcksum = 1; 136 #else 137 int udpcksum = 0; /* XXX */ 138 #endif 139 140 static void udp4_sendup __P((struct mbuf *, int, struct sockaddr *, 141 struct socket *)); 142 static int udp4_realinput __P((struct sockaddr_in *, struct sockaddr_in *, 143 struct mbuf *, int)); 144 #ifdef INET6 145 static void udp6_sendup __P((struct mbuf *, int, struct sockaddr *, 146 struct socket *)); 147 static int in6_mcmatch __P((struct in6pcb *, struct in6_addr *, 148 struct ifnet *)); 149 static int udp6_realinput __P((int, struct sockaddr_in6 *, 150 struct sockaddr_in6 *, struct mbuf *, int)); 151 #endif 152 static void udp_notify __P((struct inpcb *, int)); 153 154 #ifndef UDBHASHSIZE 155 #define UDBHASHSIZE 128 156 #endif 157 int udbhashsize = UDBHASHSIZE; 158 159 void 160 udp_init() 161 { 162 163 in_pcbinit(&udbtable, udbhashsize, udbhashsize); 164 } 165 166 #ifndef UDP6 167 void 168 #if __STDC__ 169 udp_input(struct mbuf *m, ...) 170 #else 171 udp_input(m, va_alist) 172 struct mbuf *m; 173 va_dcl 174 #endif 175 { 176 va_list ap; 177 struct sockaddr_in src, dst; 178 struct ip *ip; 179 struct udphdr *uh; 180 int iphlen, proto; 181 int len; 182 int n; 183 184 va_start(ap, m); 185 iphlen = va_arg(ap, int); 186 proto = va_arg(ap, int); 187 va_end(ap); 188 189 udpstat.udps_ipackets++; 190 191 #ifndef PULLDOWN_TEST 192 /* 193 * Strip IP options, if any; should skip this, 194 * make available to user, and use on returned packets, 195 * but we don't yet have a way to check the checksum 196 * with options still present. 197 */ 198 if (iphlen > sizeof (struct ip)) { 199 ip_stripoptions(m, (struct mbuf *)0); 200 iphlen = sizeof(struct ip); 201 } 202 #else 203 /* 204 * we may enable the above code if we save and pass IPv4 options 205 * to the userland. 206 */ 207 #endif 208 209 /* 210 * Get IP and UDP header together in first mbuf. 211 */ 212 ip = mtod(m, struct ip *); 213 #ifndef PULLDOWN_TEST 214 if (m->m_len < iphlen + sizeof(struct udphdr)) { 215 if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) { 216 udpstat.udps_hdrops++; 217 return; 218 } 219 ip = mtod(m, struct ip *); 220 } 221 uh = (struct udphdr *)((caddr_t)ip + iphlen); 222 #else 223 IP6_EXTHDR_GET(uh, struct udphdr *, m, iphlen, sizeof(struct udphdr)); 224 if (uh == NULL) { 225 udpstat.udps_hdrops++; 226 return; 227 } 228 #endif 229 230 /* destination port of 0 is illegal, based on RFC768. */ 231 if (uh->uh_dport == 0) 232 goto bad; 233 234 /* 235 * Make mbuf data length reflect UDP length. 236 * If not enough data to reflect UDP length, drop. 237 */ 238 len = ntohs((u_int16_t)uh->uh_ulen); 239 if (ip->ip_len != iphlen + len) { 240 if (ip->ip_len < iphlen + len || len < sizeof(struct udphdr)) { 241 udpstat.udps_badlen++; 242 goto bad; 243 } 244 m_adj(m, iphlen + len - ip->ip_len); 245 } 246 247 /* 248 * Checksum extended UDP header and data. 249 */ 250 if (uh->uh_sum) { 251 if (in4_cksum(m, IPPROTO_UDP, iphlen, len) != 0) { 252 udpstat.udps_badsum++; 253 m_freem(m); 254 return; 255 } 256 } 257 258 /* construct source and dst sockaddrs. */ 259 bzero(&src, sizeof(src)); 260 src.sin_family = AF_INET; 261 src.sin_len = sizeof(struct sockaddr_in); 262 bcopy(&ip->ip_src, &src.sin_addr, sizeof(src.sin_addr)); 263 src.sin_port = uh->uh_sport; 264 bzero(&dst, sizeof(dst)); 265 dst.sin_family = AF_INET; 266 dst.sin_len = sizeof(struct sockaddr_in); 267 bcopy(&ip->ip_dst, &dst.sin_addr, sizeof(dst.sin_addr)); 268 dst.sin_port = uh->uh_dport; 269 270 n = udp4_realinput(&src, &dst, m, iphlen); 271 #ifdef INET6 272 if (IN_MULTICAST(ip->ip_dst.s_addr) || n == 0) { 273 struct sockaddr_in6 src6, dst6; 274 275 bzero(&src6, sizeof(src6)); 276 src6.sin6_family = AF_INET6; 277 src6.sin6_len = sizeof(struct sockaddr_in6); 278 src6.sin6_addr.s6_addr[10] = src6.sin6_addr.s6_addr[11] = 0xff; 279 bcopy(&ip->ip_src, &src6.sin6_addr.s6_addr[12], 280 sizeof(ip->ip_src)); 281 src6.sin6_port = uh->uh_sport; 282 bzero(&dst6, sizeof(dst6)); 283 dst6.sin6_family = AF_INET6; 284 dst6.sin6_len = sizeof(struct sockaddr_in6); 285 dst6.sin6_addr.s6_addr[10] = dst6.sin6_addr.s6_addr[11] = 0xff; 286 bcopy(&ip->ip_dst, &dst6.sin6_addr.s6_addr[12], 287 sizeof(ip->ip_dst)); 288 dst6.sin6_port = uh->uh_dport; 289 290 n += udp6_realinput(AF_INET, &src6, &dst6, m, iphlen); 291 } 292 #endif 293 294 if (n == 0) { 295 if (m->m_flags & (M_BCAST | M_MCAST)) { 296 udpstat.udps_noportbcast++; 297 goto bad; 298 } 299 udpstat.udps_noport++; 300 #ifdef IPKDB 301 if (checkipkdb(&ip->ip_src, uh->uh_sport, uh->uh_dport, 302 m, iphlen + sizeof(struct udphdr), 303 m->m_pkthdr.len - iphlen - sizeof(struct udphdr))) { 304 /* 305 * It was a debugger connect packet, 306 * just drop it now 307 */ 308 goto bad; 309 } 310 #endif 311 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0); 312 m = NULL; 313 } 314 315 bad: 316 if (m) 317 m_freem(m); 318 } 319 320 #ifdef INET6 321 int 322 udp6_input(mp, offp, proto) 323 struct mbuf **mp; 324 int *offp, proto; 325 { 326 struct mbuf *m = *mp; 327 int off = *offp; 328 struct sockaddr_in6 src, dst; 329 struct ip6_hdr *ip6; 330 struct udphdr *uh; 331 u_int32_t plen, ulen; 332 333 #ifndef PULLDOWN_TEST 334 IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE); 335 #endif 336 ip6 = mtod(m, struct ip6_hdr *); 337 338 #if defined(NFAITH) && 0 < NFAITH 339 if (faithprefix(&ip6->ip6_dst)) { 340 /* send icmp6 host unreach? */ 341 m_freem(m); 342 return IPPROTO_DONE; 343 } 344 #endif 345 346 udp6stat.udp6s_ipackets++; 347 348 /* check for jumbogram is done in ip6_input. we can trust pkthdr.len */ 349 plen = m->m_pkthdr.len - off; 350 #ifndef PULLDOWN_TEST 351 uh = (struct udphdr *)((caddr_t)ip6 + off); 352 #else 353 IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(struct udphdr)); 354 if (uh == NULL) { 355 ip6stat.ip6s_tooshort++; 356 return IPPROTO_DONE; 357 } 358 #endif 359 ulen = ntohs((u_short)uh->uh_ulen); 360 if (ulen == 0 && plen > 0xffff) 361 ulen = plen; 362 363 if (plen != ulen) { 364 udp6stat.udp6s_badlen++; 365 goto bad; 366 } 367 368 /* destination port of 0 is illegal, based on RFC768. */ 369 if (uh->uh_dport == 0) 370 goto bad; 371 372 /* Be proactive about malicious use of IPv4 mapped address */ 373 if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || 374 IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { 375 /* XXX stat */ 376 goto bad; 377 } 378 379 /* 380 * Checksum extended UDP header and data. 381 */ 382 if (uh->uh_sum == 0) { 383 udp6stat.udp6s_nosum++; 384 goto bad; 385 } 386 if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) { 387 udp6stat.udp6s_badsum++; 388 goto bad; 389 } 390 391 /* 392 * Construct source and dst sockaddrs. 393 * Note that ifindex (s6_addr16[1]) is already filled. 394 */ 395 bzero(&src, sizeof(src)); 396 src.sin6_family = AF_INET6; 397 src.sin6_len = sizeof(struct sockaddr_in6); 398 bcopy(&ip6->ip6_src, &src.sin6_addr, sizeof(src.sin6_addr)); 399 if (IN6_IS_SCOPE_LINKLOCAL(&src.sin6_addr)) 400 src.sin6_addr.s6_addr16[1] = 0; 401 if (m->m_pkthdr.rcvif) { 402 if (IN6_IS_SCOPE_LINKLOCAL(&src.sin6_addr)) 403 src.sin6_scope_id = m->m_pkthdr.rcvif->if_index; 404 else 405 src.sin6_scope_id = 0; 406 } 407 src.sin6_port = uh->uh_sport; 408 bzero(&dst, sizeof(dst)); 409 dst.sin6_family = AF_INET6; 410 dst.sin6_len = sizeof(struct sockaddr_in6); 411 bcopy(&ip6->ip6_dst, &dst.sin6_addr, sizeof(dst.sin6_addr)); 412 if (IN6_IS_SCOPE_LINKLOCAL(&dst.sin6_addr)) 413 dst.sin6_addr.s6_addr16[1] = 0; 414 if (m->m_pkthdr.rcvif) { 415 if (IN6_IS_SCOPE_LINKLOCAL(&dst.sin6_addr)) 416 dst.sin6_scope_id = m->m_pkthdr.rcvif->if_index; 417 else 418 dst.sin6_scope_id = 0; 419 } 420 dst.sin6_port = uh->uh_dport; 421 422 if (udp6_realinput(AF_INET6, &src, &dst, m, off) == 0) { 423 if (m->m_flags & M_MCAST) { 424 udp6stat.udp6s_noportmcast++; 425 goto bad; 426 } 427 udp6stat.udp6s_noport++; 428 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0); 429 m = NULL; 430 } 431 432 bad: 433 if (m) 434 m_freem(m); 435 return IPPROTO_DONE; 436 } 437 #endif 438 439 static void 440 udp4_sendup(m, off, src, so) 441 struct mbuf *m; 442 int off; /* offset of data portion */ 443 struct sockaddr *src; 444 struct socket *so; 445 { 446 struct mbuf *opts = NULL; 447 struct mbuf *n; 448 struct inpcb *inp = NULL; 449 #ifdef INET6 450 struct in6pcb *in6p = NULL; 451 #endif 452 453 if (!so) 454 return; 455 switch (so->so_proto->pr_domain->dom_family) { 456 case AF_INET: 457 inp = sotoinpcb(so); 458 break; 459 #ifdef INET6 460 case AF_INET6: 461 in6p = sotoin6pcb(so); 462 break; 463 #endif 464 default: 465 return; 466 } 467 468 #ifdef IPSEC 469 /* check AH/ESP integrity. */ 470 if (so != NULL && ipsec4_in_reject_so(m, so)) { 471 ipsecstat.in_polvio++; 472 return; 473 } 474 #endif /*IPSEC*/ 475 476 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { 477 if (inp && (inp->inp_flags & INP_CONTROLOPTS 478 || so->so_options & SO_TIMESTAMP)) { 479 struct ip *ip = mtod(n, struct ip *); 480 ip_savecontrol(inp, &opts, ip, n); 481 } 482 483 m_adj(n, off); 484 if (sbappendaddr(&so->so_rcv, src, n, 485 opts) == 0) { 486 m_freem(n); 487 if (opts) 488 m_freem(opts); 489 } else 490 sorwakeup(so); 491 } 492 } 493 494 #ifdef INET6 495 static void 496 udp6_sendup(m, off, src, so) 497 struct mbuf *m; 498 int off; /* offset of data portion */ 499 struct sockaddr *src; 500 struct socket *so; 501 { 502 struct mbuf *opts = NULL; 503 struct mbuf *n; 504 struct in6pcb *in6p = NULL; 505 506 if (!so) 507 return; 508 if (so->so_proto->pr_domain->dom_family != AF_INET6) 509 return; 510 in6p = sotoin6pcb(so); 511 512 #ifdef IPSEC 513 /* check AH/ESP integrity. */ 514 if (so != NULL && ipsec6_in_reject_so(m, so)) { 515 ipsec6stat.in_polvio++; 516 return; 517 } 518 #endif /*IPSEC*/ 519 520 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { 521 if (in6p && (in6p->in6p_flags & IN6P_CONTROLOPTS 522 || in6p->in6p_socket->so_options & SO_TIMESTAMP)) { 523 struct ip6_hdr *ip6 = mtod(n, struct ip6_hdr *); 524 ip6_savecontrol(in6p, &opts, ip6, n); 525 } 526 527 m_adj(n, off); 528 if (sbappendaddr(&so->so_rcv, src, n, opts) == 0) { 529 m_freem(n); 530 if (opts) 531 m_freem(opts); 532 udp6stat.udp6s_fullsock++; 533 } else 534 sorwakeup(so); 535 } 536 } 537 #endif 538 539 static int 540 udp4_realinput(src, dst, m, off) 541 struct sockaddr_in *src; 542 struct sockaddr_in *dst; 543 struct mbuf *m; 544 int off; /* offset of udphdr */ 545 { 546 u_int16_t *sport, *dport; 547 int rcvcnt; 548 struct in_addr *src4, *dst4; 549 struct inpcb *inp; 550 551 rcvcnt = 0; 552 off += sizeof(struct udphdr); /* now, offset of payload */ 553 554 if (src->sin_family != AF_INET || dst->sin_family != AF_INET) 555 goto bad; 556 557 src4 = &src->sin_addr; 558 sport = &src->sin_port; 559 dst4 = &dst->sin_addr; 560 dport = &dst->sin_port; 561 562 if (IN_MULTICAST(dst4->s_addr) || 563 in_broadcast(*dst4, m->m_pkthdr.rcvif)) { 564 struct inpcb *last; 565 /* 566 * Deliver a multicast or broadcast datagram to *all* sockets 567 * for which the local and remote addresses and ports match 568 * those of the incoming datagram. This allows more than 569 * one process to receive multi/broadcasts on the same port. 570 * (This really ought to be done for unicast datagrams as 571 * well, but that would cause problems with existing 572 * applications that open both address-specific sockets and 573 * a wildcard socket listening to the same port -- they would 574 * end up receiving duplicates of every unicast datagram. 575 * Those applications open the multiple sockets to overcome an 576 * inadequacy of the UDP socket interface, but for backwards 577 * compatibility we avoid the problem here rather than 578 * fixing the interface. Maybe 4.5BSD will remedy this?) 579 */ 580 581 /* 582 * KAME note: usually we drop udpiphdr from mbuf here. 583 * we need udpiphdr for iPsec processing so we do that later. 584 */ 585 /* 586 * Locate pcb(s) for datagram. 587 */ 588 for (inp = udbtable.inpt_queue.cqh_first; 589 inp != (struct inpcb *)&udbtable.inpt_queue; 590 inp = inp->inp_queue.cqe_next) { 591 if (inp->inp_lport != *dport) 592 continue; 593 if (!in_nullhost(inp->inp_laddr)) { 594 if (!in_hosteq(inp->inp_laddr, *dst4)) 595 continue; 596 } 597 if (!in_nullhost(inp->inp_faddr)) { 598 if (!in_hosteq(inp->inp_faddr, *src4) || 599 inp->inp_fport != *sport) 600 continue; 601 } 602 603 last = inp; 604 udp4_sendup(m, off, (struct sockaddr *)src, 605 inp->inp_socket); 606 rcvcnt++; 607 608 /* 609 * Don't look for additional matches if this one does 610 * not have either the SO_REUSEPORT or SO_REUSEADDR 611 * socket options set. This heuristic avoids searching 612 * through all pcbs in the common case of a non-shared 613 * port. It assumes that an application will never 614 * clear these options after setting them. 615 */ 616 if ((inp->inp_socket->so_options & 617 (SO_REUSEPORT|SO_REUSEADDR)) == 0) 618 break; 619 } 620 621 #if 0 622 if (last == NULL) { 623 /* 624 * No matching pcb found; discard datagram. 625 * (No need to send an ICMP Port Unreachable 626 * for a broadcast or multicast datgram.) 627 */ 628 udpstat.udps_noportbcast++; 629 goto bad; 630 } 631 #endif 632 } else { 633 /* 634 * Locate pcb for datagram. 635 */ 636 inp = in_pcblookup_connect(&udbtable, *src4, *sport, *dst4, *dport); 637 if (inp == 0) { 638 ++udpstat.udps_pcbhashmiss; 639 inp = in_pcblookup_bind(&udbtable, *dst4, *dport); 640 if (inp == 0) { 641 #if 0 642 struct mbuf *n; 643 644 if (m->m_flags & (M_BCAST | M_MCAST)) { 645 udpstat.udps_noportbcast++; 646 goto bad; 647 } 648 udpstat.udps_noport++; 649 #ifdef IPKDB 650 if (checkipkdb(src4, *sport, *dport, m, off, 651 m->m_pkthdr.len - off)) { 652 /* 653 * It was a debugger connect packet, 654 * just drop it now 655 */ 656 goto bad; 657 } 658 #endif 659 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { 660 icmp_error(n, ICMP_UNREACH, 661 ICMP_UNREACH_PORT, 0, 0); 662 } 663 #endif 664 return rcvcnt; 665 } 666 } 667 668 udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket); 669 rcvcnt++; 670 } 671 672 bad: 673 return rcvcnt; 674 } 675 676 #ifdef INET6 677 static int 678 in6_mcmatch(in6p, ia6, ifp) 679 struct in6pcb *in6p; 680 struct in6_addr *ia6; 681 struct ifnet *ifp; 682 { 683 struct ip6_moptions *im6o = in6p->in6p_moptions; 684 struct in6_multi_mship *imm; 685 686 if (im6o == NULL) 687 return 0; 688 689 for (imm = im6o->im6o_memberships.lh_first; imm != NULL; 690 imm = imm->i6mm_chain.le_next) { 691 if ((ifp == NULL || 692 imm->i6mm_maddr->in6m_ifp == ifp) && 693 IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr, 694 ia6)) 695 return 1; 696 } 697 return 0; 698 } 699 700 static int 701 udp6_realinput(af, src, dst, m, off) 702 int af; /* af on packet */ 703 struct sockaddr_in6 *src; 704 struct sockaddr_in6 *dst; 705 struct mbuf *m; 706 int off; /* offset of udphdr */ 707 { 708 u_int16_t *sport, *dport; 709 int rcvcnt; 710 struct in6_addr *src6, *dst6; 711 struct in_addr *dst4; 712 struct in6pcb *in6p; 713 714 rcvcnt = 0; 715 off += sizeof(struct udphdr); /* now, offset of payload */ 716 717 if (af != AF_INET && af != AF_INET6) 718 goto bad; 719 if (src->sin6_family != AF_INET6 || dst->sin6_family != AF_INET6) 720 goto bad; 721 722 src6 = &src->sin6_addr; 723 sport = &src->sin6_port; 724 dst6 = &dst->sin6_addr; 725 dport = &dst->sin6_port; 726 dst4 = (struct in_addr *)&dst->sin6_addr.s6_addr32[12]; 727 728 if (IN6_IS_ADDR_MULTICAST(dst6) 729 || (af == AF_INET && IN_MULTICAST(dst4->s_addr))) { 730 struct in6pcb *last; 731 /* 732 * Deliver a multicast or broadcast datagram to *all* sockets 733 * for which the local and remote addresses and ports match 734 * those of the incoming datagram. This allows more than 735 * one process to receive multi/broadcasts on the same port. 736 * (This really ought to be done for unicast datagrams as 737 * well, but that would cause problems with existing 738 * applications that open both address-specific sockets and 739 * a wildcard socket listening to the same port -- they would 740 * end up receiving duplicates of every unicast datagram. 741 * Those applications open the multiple sockets to overcome an 742 * inadequacy of the UDP socket interface, but for backwards 743 * compatibility we avoid the problem here rather than 744 * fixing the interface. Maybe 4.5BSD will remedy this?) 745 */ 746 747 /* 748 * KAME note: usually we drop udpiphdr from mbuf here. 749 * we need udpiphdr for iPsec processing so we do that later. 750 */ 751 /* 752 * Locate pcb(s) for datagram. 753 */ 754 for (in6p = udb6.in6p_next; in6p != &udb6; 755 in6p = in6p->in6p_next) { 756 if (in6p->in6p_lport != *dport) 757 continue; 758 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { 759 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, dst6) 760 && !in6_mcmatch(in6p, dst6, m->m_pkthdr.rcvif)) 761 continue; 762 } 763 #ifndef INET6_BINDV6ONLY 764 else { 765 if (IN6_IS_ADDR_V4MAPPED(dst6) 766 && (in6p->in6p_flags & IN6P_BINDV6ONLY)) 767 continue; 768 } 769 #endif 770 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 771 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, src6) 772 || in6p->in6p_fport != *sport) 773 continue; 774 } 775 #ifndef INET6_BINDV6ONLY 776 else { 777 if (IN6_IS_ADDR_V4MAPPED(src6) 778 && (in6p->in6p_flags & IN6P_BINDV6ONLY)) 779 continue; 780 } 781 #endif 782 783 last = in6p; 784 udp6_sendup(m, off, (struct sockaddr *)src, 785 in6p->in6p_socket); 786 rcvcnt++; 787 788 /* 789 * Don't look for additional matches if this one does 790 * not have either the SO_REUSEPORT or SO_REUSEADDR 791 * socket options set. This heuristic avoids searching 792 * through all pcbs in the common case of a non-shared 793 * port. It assumes that an application will never 794 * clear these options after setting them. 795 */ 796 if ((in6p->in6p_socket->so_options & 797 (SO_REUSEPORT|SO_REUSEADDR)) == 0) 798 break; 799 } 800 801 #if 0 802 if (last == NULL) { 803 /* 804 * No matching pcb found; discard datagram. 805 * (No need to send an ICMP Port Unreachable 806 * for a broadcast or multicast datgram.) 807 */ 808 switch (af) { 809 case AF_INET: 810 udpstat.udps_noportbcast++; 811 break; 812 case AF_INET6: 813 udp6stat.udp6s_noportmcast++; 814 break; 815 } 816 goto bad; 817 } 818 #endif 819 } else { 820 /* 821 * Locate pcb for datagram. 822 */ 823 in6p = in6_pcblookup_connect(&udb6, src6, *sport, 824 dst6, *dport, 0); 825 if (in6p == 0) { 826 ++udpstat.udps_pcbhashmiss; 827 in6p = in6_pcblookup_bind(&udb6, dst6, *dport, 0); 828 if (in6p == 0) { 829 #if 0 830 struct mbuf *n; 831 n = m_copy(m, 0, M_COPYALL); 832 switch (af) { 833 case AF_INET: 834 if (m->m_flags & (M_BCAST | M_MCAST)) { 835 udpstat.udps_noportbcast++; 836 goto bad; 837 } 838 udpstat.udps_noport++; 839 if (n != NULL) 840 icmp_error(n, ICMP_UNREACH, 841 ICMP_UNREACH_PORT, 0, 0); 842 break; 843 case AF_INET6: 844 if (m->m_flags & M_MCAST) { 845 udp6stat.udp6s_noportmcast++; 846 goto bad; 847 } 848 udp6stat.udp6s_noport++; 849 if (n != NULL) 850 icmp6_error(n, ICMP6_DST_UNREACH, 851 ICMP6_DST_UNREACH_NOPORT, 0); 852 break; 853 } 854 #endif 855 856 return rcvcnt; 857 } 858 } 859 860 udp6_sendup(m, off, (struct sockaddr *)src, in6p->in6p_socket); 861 rcvcnt++; 862 } 863 864 bad: 865 return rcvcnt; 866 } 867 #endif 868 869 #else /*UDP6*/ 870 871 void 872 #if __STDC__ 873 udp_input(struct mbuf *m, ...) 874 #else 875 udp_input(m, va_alist) 876 struct mbuf *m; 877 va_dcl 878 #endif 879 { 880 int proto; 881 struct ip *ip; 882 struct udphdr *uh; 883 struct inpcb *inp; 884 struct mbuf *opts = 0; 885 int len; 886 struct ip save_ip; 887 int iphlen; 888 va_list ap; 889 struct sockaddr_in udpsrc; 890 struct sockaddr *sa; 891 892 va_start(ap, m); 893 iphlen = va_arg(ap, int); 894 proto = va_arg(ap, int); 895 va_end(ap); 896 897 udpstat.udps_ipackets++; 898 899 /* 900 * Strip IP options, if any; should skip this, 901 * make available to user, and use on returned packets, 902 * but we don't yet have a way to check the checksum 903 * with options still present. 904 */ 905 if (iphlen > sizeof (struct ip)) { 906 ip_stripoptions(m, (struct mbuf *)0); 907 iphlen = sizeof(struct ip); 908 } 909 910 /* 911 * Get IP and UDP header together in first mbuf. 912 */ 913 ip = mtod(m, struct ip *); 914 if (m->m_len < iphlen + sizeof(struct udphdr)) { 915 if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) { 916 udpstat.udps_hdrops++; 917 return; 918 } 919 ip = mtod(m, struct ip *); 920 } 921 uh = (struct udphdr *)((caddr_t)ip + iphlen); 922 923 /* destination port of 0 is illegal, based on RFC768. */ 924 if (uh->uh_dport == 0) 925 goto bad; 926 927 /* 928 * Make mbuf data length reflect UDP length. 929 * If not enough data to reflect UDP length, drop. 930 */ 931 len = ntohs((u_int16_t)uh->uh_ulen); 932 if (ip->ip_len != iphlen + len) { 933 if (ip->ip_len < iphlen + len || len < sizeof(struct udphdr)) { 934 udpstat.udps_badlen++; 935 goto bad; 936 } 937 m_adj(m, iphlen + len - ip->ip_len); 938 } 939 /* 940 * Save a copy of the IP header in case we want restore it 941 * for sending an ICMP error message in response. 942 */ 943 save_ip = *ip; 944 945 /* 946 * Checksum extended UDP header and data. 947 */ 948 if (uh->uh_sum) { 949 bzero(((struct ipovly *)ip)->ih_x1, 950 sizeof ((struct ipovly *)ip)->ih_x1); 951 ((struct ipovly *)ip)->ih_len = uh->uh_ulen; 952 if (in_cksum(m, len + sizeof (struct ip)) != 0) { 953 udpstat.udps_badsum++; 954 m_freem(m); 955 return; 956 } 957 } 958 959 /* 960 * Construct sockaddr format source address. 961 */ 962 udpsrc.sin_family = AF_INET; 963 udpsrc.sin_len = sizeof(struct sockaddr_in); 964 udpsrc.sin_addr = ip->ip_src; 965 udpsrc.sin_port = uh->uh_sport; 966 bzero((caddr_t)udpsrc.sin_zero, sizeof(udpsrc.sin_zero)); 967 968 if (IN_MULTICAST(ip->ip_dst.s_addr) || 969 in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) { 970 struct inpcb *last; 971 /* 972 * Deliver a multicast or broadcast datagram to *all* sockets 973 * for which the local and remote addresses and ports match 974 * those of the incoming datagram. This allows more than 975 * one process to receive multi/broadcasts on the same port. 976 * (This really ought to be done for unicast datagrams as 977 * well, but that would cause problems with existing 978 * applications that open both address-specific sockets and 979 * a wildcard socket listening to the same port -- they would 980 * end up receiving duplicates of every unicast datagram. 981 * Those applications open the multiple sockets to overcome an 982 * inadequacy of the UDP socket interface, but for backwards 983 * compatibility we avoid the problem here rather than 984 * fixing the interface. Maybe 4.5BSD will remedy this?) 985 */ 986 987 iphlen += sizeof(struct udphdr); 988 /* 989 * KAME note: usually we drop udpiphdr from mbuf here. 990 * we need udpiphdr for iPsec processing so we do that later. 991 */ 992 /* 993 * Locate pcb(s) for datagram. 994 * (Algorithm copied from raw_intr().) 995 */ 996 last = NULL; 997 for (inp = udbtable.inpt_queue.cqh_first; 998 inp != (struct inpcb *)&udbtable.inpt_queue; 999 inp = inp->inp_queue.cqe_next) { 1000 if (inp->inp_lport != uh->uh_dport) 1001 continue; 1002 if (!in_nullhost(inp->inp_laddr)) { 1003 if (!in_hosteq(inp->inp_laddr, ip->ip_dst)) 1004 continue; 1005 } 1006 if (!in_nullhost(inp->inp_faddr)) { 1007 if (!in_hosteq(inp->inp_faddr, ip->ip_src) || 1008 inp->inp_fport != uh->uh_sport) 1009 continue; 1010 } 1011 1012 if (last != NULL) { 1013 struct mbuf *n; 1014 1015 #ifdef IPSEC 1016 /* check AH/ESP integrity. */ 1017 if (last != NULL && ipsec4_in_reject(m, last)) { 1018 ipsecstat.in_polvio++; 1019 /* do not inject data to pcb */ 1020 } else 1021 #endif /*IPSEC*/ 1022 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { 1023 if (last->inp_flags & INP_CONTROLOPTS 1024 || last->inp_socket->so_options & 1025 SO_TIMESTAMP) { 1026 ip_savecontrol(last, &opts, 1027 ip, n); 1028 } 1029 m_adj(n, iphlen); 1030 sa = (struct sockaddr *)&udpsrc; 1031 if (sbappendaddr( 1032 &last->inp_socket->so_rcv, 1033 sa, n, opts) == 0) { 1034 m_freem(n); 1035 if (opts) 1036 m_freem(opts); 1037 } else 1038 sorwakeup(last->inp_socket); 1039 opts = 0; 1040 } 1041 } 1042 last = inp; 1043 /* 1044 * Don't look for additional matches if this one does 1045 * not have either the SO_REUSEPORT or SO_REUSEADDR 1046 * socket options set. This heuristic avoids searching 1047 * through all pcbs in the common case of a non-shared 1048 * port. It * assumes that an application will never 1049 * clear these options after setting them. 1050 */ 1051 if ((last->inp_socket->so_options & 1052 (SO_REUSEPORT|SO_REUSEADDR)) == 0) 1053 break; 1054 } 1055 1056 if (last == NULL) { 1057 /* 1058 * No matching pcb found; discard datagram. 1059 * (No need to send an ICMP Port Unreachable 1060 * for a broadcast or multicast datgram.) 1061 */ 1062 udpstat.udps_noportbcast++; 1063 goto bad; 1064 } 1065 #ifdef IPSEC 1066 /* check AH/ESP integrity. */ 1067 if (last != NULL && ipsec4_in_reject(m, last)) { 1068 ipsecstat.in_polvio++; 1069 goto bad; 1070 } 1071 #endif /*IPSEC*/ 1072 if (last->inp_flags & INP_CONTROLOPTS || 1073 last->inp_socket->so_options & SO_TIMESTAMP) 1074 ip_savecontrol(last, &opts, ip, m); 1075 m->m_len -= iphlen; 1076 m->m_pkthdr.len -= iphlen; 1077 m->m_data += iphlen; 1078 sa = (struct sockaddr *)&udpsrc; 1079 if (sbappendaddr(&last->inp_socket->so_rcv, sa, m, opts) == 0) { 1080 udpstat.udps_fullsock++; 1081 goto bad; 1082 } 1083 sorwakeup(last->inp_socket); 1084 return; 1085 } 1086 /* 1087 * Locate pcb for datagram. 1088 */ 1089 inp = in_pcblookup_connect(&udbtable, ip->ip_src, uh->uh_sport, 1090 ip->ip_dst, uh->uh_dport); 1091 if (inp == 0) { 1092 ++udpstat.udps_pcbhashmiss; 1093 inp = in_pcblookup_bind(&udbtable, ip->ip_dst, uh->uh_dport); 1094 if (inp == 0) { 1095 if (m->m_flags & (M_BCAST | M_MCAST)) { 1096 udpstat.udps_noportbcast++; 1097 goto bad; 1098 } 1099 udpstat.udps_noport++; 1100 *ip = save_ip; 1101 #ifdef IPKDB 1102 if (checkipkdb(&ip->ip_src, 1103 uh->uh_sport, 1104 uh->uh_dport, 1105 m, 1106 iphlen + sizeof(struct udphdr), 1107 len - sizeof(struct udphdr))) 1108 /* It was a debugger connect packet, just drop it now */ 1109 goto bad; 1110 #endif 1111 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0); 1112 return; 1113 } 1114 } 1115 #ifdef IPSEC 1116 if (inp != NULL && ipsec4_in_reject(m, inp)) { 1117 ipsecstat.in_polvio++; 1118 goto bad; 1119 } 1120 #endif /*IPSEC*/ 1121 1122 /* 1123 * Stuff source address and datagram in user buffer. 1124 */ 1125 if (inp->inp_flags & INP_CONTROLOPTS || 1126 inp->inp_socket->so_options & SO_TIMESTAMP) 1127 ip_savecontrol(inp, &opts, ip, m); 1128 iphlen += sizeof(struct udphdr); 1129 m->m_len -= iphlen; 1130 m->m_pkthdr.len -= iphlen; 1131 m->m_data += iphlen; 1132 sa = (struct sockaddr *)&udpsrc; 1133 if (sbappendaddr(&inp->inp_socket->so_rcv, sa, m, opts) == 0) { 1134 udpstat.udps_fullsock++; 1135 goto bad; 1136 } 1137 sorwakeup(inp->inp_socket); 1138 return; 1139 bad: 1140 m_freem(m); 1141 if (opts) 1142 m_freem(opts); 1143 } 1144 #endif /*UDP6*/ 1145 1146 /* 1147 * Notify a udp user of an asynchronous error; 1148 * just wake up so that he can collect error status. 1149 */ 1150 static void 1151 udp_notify(inp, errno) 1152 struct inpcb *inp; 1153 int errno; 1154 { 1155 1156 inp->inp_socket->so_error = errno; 1157 sorwakeup(inp->inp_socket); 1158 sowwakeup(inp->inp_socket); 1159 } 1160 1161 void * 1162 udp_ctlinput(cmd, sa, v) 1163 int cmd; 1164 struct sockaddr *sa; 1165 void *v; 1166 { 1167 struct ip *ip = v; 1168 struct udphdr *uh; 1169 void (*notify) __P((struct inpcb *, int)) = udp_notify; 1170 int errno; 1171 1172 if (sa->sa_family != AF_INET 1173 || sa->sa_len != sizeof(struct sockaddr_in)) 1174 return NULL; 1175 if ((unsigned)cmd >= PRC_NCMDS) 1176 return NULL; 1177 errno = inetctlerrmap[cmd]; 1178 if (PRC_IS_REDIRECT(cmd)) 1179 notify = in_rtchange, ip = 0; 1180 else if (cmd == PRC_HOSTDEAD) 1181 ip = 0; 1182 else if (errno == 0) 1183 return NULL; 1184 if (ip) { 1185 uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2)); 1186 in_pcbnotify(&udbtable, satosin(sa)->sin_addr, uh->uh_dport, 1187 ip->ip_src, uh->uh_sport, errno, notify); 1188 1189 /* XXX mapped address case */ 1190 } else 1191 in_pcbnotifyall(&udbtable, satosin(sa)->sin_addr, errno, 1192 notify); 1193 return NULL; 1194 } 1195 1196 int 1197 #if __STDC__ 1198 udp_output(struct mbuf *m, ...) 1199 #else 1200 udp_output(m, va_alist) 1201 struct mbuf *m; 1202 va_dcl 1203 #endif 1204 { 1205 struct inpcb *inp; 1206 struct udpiphdr *ui; 1207 int len = m->m_pkthdr.len; 1208 int error = 0; 1209 va_list ap; 1210 1211 va_start(ap, m); 1212 inp = va_arg(ap, struct inpcb *); 1213 va_end(ap); 1214 1215 /* 1216 * Calculate data length and get a mbuf 1217 * for UDP and IP headers. 1218 */ 1219 M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT); 1220 if (m == 0) { 1221 error = ENOBUFS; 1222 goto release; 1223 } 1224 1225 /* 1226 * Compute the packet length of the IP header, and 1227 * punt if the length looks bogus. 1228 */ 1229 if ((len + sizeof(struct udpiphdr)) > IP_MAXPACKET) { 1230 error = EMSGSIZE; 1231 goto release; 1232 } 1233 1234 /* 1235 * Fill in mbuf with extended UDP header 1236 * and addresses and length put into network format. 1237 */ 1238 ui = mtod(m, struct udpiphdr *); 1239 bzero(ui->ui_x1, sizeof ui->ui_x1); 1240 ui->ui_pr = IPPROTO_UDP; 1241 ui->ui_len = htons((u_int16_t)len + sizeof (struct udphdr)); 1242 ui->ui_src = inp->inp_laddr; 1243 ui->ui_dst = inp->inp_faddr; 1244 ui->ui_sport = inp->inp_lport; 1245 ui->ui_dport = inp->inp_fport; 1246 ui->ui_ulen = ui->ui_len; 1247 1248 /* 1249 * Stuff checksum and output datagram. 1250 */ 1251 ui->ui_sum = 0; 1252 if (udpcksum) { 1253 if ((ui->ui_sum = in_cksum(m, sizeof (struct udpiphdr) + len)) == 0) 1254 ui->ui_sum = 0xffff; 1255 } 1256 ((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len; 1257 ((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */ 1258 ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */ 1259 udpstat.udps_opackets++; 1260 1261 #ifdef IPSEC 1262 if (ipsec_setsocket(m, inp->inp_socket) != 0) { 1263 error = ENOBUFS; 1264 goto release; 1265 } 1266 #endif /*IPSEC*/ 1267 1268 return (ip_output(m, inp->inp_options, &inp->inp_route, 1269 inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST), 1270 inp->inp_moptions)); 1271 1272 release: 1273 m_freem(m); 1274 return (error); 1275 } 1276 1277 int udp_sendspace = 9216; /* really max datagram size */ 1278 int udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in)); 1279 /* 40 1K datagrams */ 1280 1281 /*ARGSUSED*/ 1282 int 1283 udp_usrreq(so, req, m, nam, control, p) 1284 struct socket *so; 1285 int req; 1286 struct mbuf *m, *nam, *control; 1287 struct proc *p; 1288 { 1289 struct inpcb *inp; 1290 int s; 1291 int error = 0; 1292 1293 if (req == PRU_CONTROL) 1294 return (in_control(so, (long)m, (caddr_t)nam, 1295 (struct ifnet *)control, p)); 1296 1297 if (req == PRU_PURGEIF) { 1298 in_purgeif((struct ifnet *)control); 1299 in_pcbpurgeif(&udbtable, (struct ifnet *)control); 1300 return (0); 1301 } 1302 1303 s = splsoftnet(); 1304 inp = sotoinpcb(so); 1305 #ifdef DIAGNOSTIC 1306 if (req != PRU_SEND && req != PRU_SENDOOB && control) 1307 panic("udp_usrreq: unexpected control mbuf"); 1308 #endif 1309 if (inp == 0 && req != PRU_ATTACH) { 1310 error = EINVAL; 1311 goto release; 1312 } 1313 1314 /* 1315 * Note: need to block udp_input while changing 1316 * the udp pcb queue and/or pcb addresses. 1317 */ 1318 switch (req) { 1319 1320 case PRU_ATTACH: 1321 if (inp != 0) { 1322 error = EISCONN; 1323 break; 1324 } 1325 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 1326 error = soreserve(so, udp_sendspace, udp_recvspace); 1327 if (error) 1328 break; 1329 } 1330 error = in_pcballoc(so, &udbtable); 1331 if (error) 1332 break; 1333 inp = sotoinpcb(so); 1334 inp->inp_ip.ip_ttl = ip_defttl; 1335 #ifdef IPSEC 1336 error = ipsec_init_policy(so, &inp->inp_sp); 1337 if (error != 0) { 1338 in_pcbdetach(inp); 1339 break; 1340 } 1341 #endif /*IPSEC*/ 1342 break; 1343 1344 case PRU_DETACH: 1345 in_pcbdetach(inp); 1346 break; 1347 1348 case PRU_BIND: 1349 error = in_pcbbind(inp, nam, p); 1350 break; 1351 1352 case PRU_LISTEN: 1353 error = EOPNOTSUPP; 1354 break; 1355 1356 case PRU_CONNECT: 1357 error = in_pcbconnect(inp, nam); 1358 if (error) 1359 break; 1360 soisconnected(so); 1361 break; 1362 1363 case PRU_CONNECT2: 1364 error = EOPNOTSUPP; 1365 break; 1366 1367 case PRU_DISCONNECT: 1368 /*soisdisconnected(so);*/ 1369 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 1370 in_pcbdisconnect(inp); 1371 inp->inp_laddr = zeroin_addr; /* XXX */ 1372 in_pcbstate(inp, INP_BOUND); /* XXX */ 1373 break; 1374 1375 case PRU_SHUTDOWN: 1376 socantsendmore(so); 1377 break; 1378 1379 case PRU_RCVD: 1380 error = EOPNOTSUPP; 1381 break; 1382 1383 case PRU_SEND: 1384 if (control && control->m_len) { 1385 m_freem(control); 1386 m_freem(m); 1387 error = EINVAL; 1388 break; 1389 } 1390 { 1391 struct in_addr laddr; /* XXX */ 1392 1393 if (nam) { 1394 laddr = inp->inp_laddr; /* XXX */ 1395 if ((so->so_state & SS_ISCONNECTED) != 0) { 1396 error = EISCONN; 1397 goto die; 1398 } 1399 error = in_pcbconnect(inp, nam); 1400 if (error) { 1401 die: 1402 m_freem(m); 1403 break; 1404 } 1405 } else { 1406 if ((so->so_state & SS_ISCONNECTED) == 0) { 1407 error = ENOTCONN; 1408 goto die; 1409 } 1410 } 1411 error = udp_output(m, inp); 1412 if (nam) { 1413 in_pcbdisconnect(inp); 1414 inp->inp_laddr = laddr; /* XXX */ 1415 in_pcbstate(inp, INP_BOUND); /* XXX */ 1416 } 1417 } 1418 break; 1419 1420 case PRU_SENSE: 1421 /* 1422 * stat: don't bother with a blocksize. 1423 */ 1424 splx(s); 1425 return (0); 1426 1427 case PRU_RCVOOB: 1428 error = EOPNOTSUPP; 1429 break; 1430 1431 case PRU_SENDOOB: 1432 m_freem(control); 1433 m_freem(m); 1434 error = EOPNOTSUPP; 1435 break; 1436 1437 case PRU_SOCKADDR: 1438 in_setsockaddr(inp, nam); 1439 break; 1440 1441 case PRU_PEERADDR: 1442 in_setpeeraddr(inp, nam); 1443 break; 1444 1445 default: 1446 panic("udp_usrreq"); 1447 } 1448 1449 release: 1450 splx(s); 1451 return (error); 1452 } 1453 1454 /* 1455 * Sysctl for udp variables. 1456 */ 1457 int 1458 udp_sysctl(name, namelen, oldp, oldlenp, newp, newlen) 1459 int *name; 1460 u_int namelen; 1461 void *oldp; 1462 size_t *oldlenp; 1463 void *newp; 1464 size_t newlen; 1465 { 1466 /* All sysctl names at this level are terminal. */ 1467 if (namelen != 1) 1468 return (ENOTDIR); 1469 1470 switch (name[0]) { 1471 case UDPCTL_CHECKSUM: 1472 return (sysctl_int(oldp, oldlenp, newp, newlen, &udpcksum)); 1473 case UDPCTL_SENDSPACE: 1474 return (sysctl_int(oldp, oldlenp, newp, newlen, 1475 &udp_sendspace)); 1476 case UDPCTL_RECVSPACE: 1477 return (sysctl_int(oldp, oldlenp, newp, newlen, 1478 &udp_recvspace)); 1479 default: 1480 return (ENOPROTOOPT); 1481 } 1482 /* NOTREACHED */ 1483 } 1484
Indexes created Fri Sep 26 20:09:58 GMT 2025