udp_usrreq.c revision 1.68
1 /* $NetBSD: udp_usrreq.c,v 1.68 2000/07/06 12:51:40 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 #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 <uvm/uvm_extern.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 <machine/stdarg.h> 114 115 #ifdef IPSEC 116 #include <netinet6/ipsec.h> 117 #include <netkey/key.h> 118 #endif /*IPSEC*/ 119 120 #ifdef IPKDB 121 #include <ipkdb/ipkdb.h> 122 #endif 123 124 /* 125 * UDP protocol implementation. 126 * Per RFC 768, August, 1980. 127 */ 128 #ifndef COMPAT_42 129 int udpcksum = 1; 130 #else 131 int udpcksum = 0; /* XXX */ 132 #endif 133 134 static void udp4_sendup __P((struct mbuf *, int, struct sockaddr *, 135 struct socket *)); 136 static int udp4_realinput __P((struct sockaddr_in *, struct sockaddr_in *, 137 struct mbuf *, int)); 138 #ifdef INET6 139 static void udp6_sendup __P((struct mbuf *, int, struct sockaddr *, 140 struct socket *)); 141 static int in6_mcmatch __P((struct in6pcb *, struct in6_addr *, 142 struct ifnet *)); 143 static int udp6_realinput __P((int, struct sockaddr_in6 *, 144 struct sockaddr_in6 *, struct mbuf *, int)); 145 #endif 146 static void udp_notify __P((struct inpcb *, int)); 147 148 #ifndef UDBHASHSIZE 149 #define UDBHASHSIZE 128 150 #endif 151 int udbhashsize = UDBHASHSIZE; 152 153 void 154 udp_init() 155 { 156 157 in_pcbinit(&udbtable, udbhashsize, udbhashsize); 158 } 159 160 #ifndef UDP6 161 void 162 #if __STDC__ 163 udp_input(struct mbuf *m, ...) 164 #else 165 udp_input(m, va_alist) 166 struct mbuf *m; 167 va_dcl 168 #endif 169 { 170 va_list ap; 171 struct sockaddr_in src, dst; 172 struct ip *ip; 173 struct udphdr *uh; 174 int iphlen, proto; 175 int len; 176 int n; 177 178 va_start(ap, m); 179 iphlen = va_arg(ap, int); 180 proto = va_arg(ap, int); 181 va_end(ap); 182 183 udpstat.udps_ipackets++; 184 185 #ifndef PULLDOWN_TEST 186 /* 187 * Strip IP options, if any; should skip this, 188 * make available to user, and use on returned packets, 189 * but we don't yet have a way to check the checksum 190 * with options still present. 191 */ 192 if (iphlen > sizeof (struct ip)) { 193 ip_stripoptions(m, (struct mbuf *)0); 194 iphlen = sizeof(struct ip); 195 } 196 #else 197 /* 198 * we may enable the above code if we save and pass IPv4 options 199 * to the userland. 200 */ 201 #endif 202 203 /* 204 * Get IP and UDP header together in first mbuf. 205 */ 206 ip = mtod(m, struct ip *); 207 #ifndef PULLDOWN_TEST 208 if (m->m_len < iphlen + sizeof(struct udphdr)) { 209 if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) { 210 udpstat.udps_hdrops++; 211 return; 212 } 213 ip = mtod(m, struct ip *); 214 } 215 uh = (struct udphdr *)((caddr_t)ip + iphlen); 216 #else 217 IP6_EXTHDR_GET(uh, struct udphdr *, m, iphlen, sizeof(struct udphdr)); 218 if (uh == NULL) { 219 udpstat.udps_hdrops++; 220 return; 221 } 222 #endif 223 224 /* destination port of 0 is illegal, based on RFC768. */ 225 if (uh->uh_dport == 0) 226 goto bad; 227 228 /* 229 * Make mbuf data length reflect UDP length. 230 * If not enough data to reflect UDP length, drop. 231 */ 232 len = ntohs((u_int16_t)uh->uh_ulen); 233 if (ip->ip_len != iphlen + len) { 234 if (ip->ip_len < iphlen + len) { 235 udpstat.udps_badlen++; 236 goto bad; 237 } 238 m_adj(m, iphlen + len - ip->ip_len); 239 } 240 241 /* 242 * Checksum extended UDP header and data. 243 */ 244 if (uh->uh_sum) { 245 if (in4_cksum(m, IPPROTO_UDP, iphlen, len) != 0) { 246 udpstat.udps_badsum++; 247 m_freem(m); 248 return; 249 } 250 } 251 252 /* construct source and dst sockaddrs. */ 253 bzero(&src, sizeof(src)); 254 src.sin_family = AF_INET; 255 src.sin_len = sizeof(struct sockaddr_in); 256 bcopy(&ip->ip_src, &src.sin_addr, sizeof(src.sin_addr)); 257 src.sin_port = uh->uh_sport; 258 bzero(&dst, sizeof(dst)); 259 dst.sin_family = AF_INET; 260 dst.sin_len = sizeof(struct sockaddr_in); 261 bcopy(&ip->ip_dst, &dst.sin_addr, sizeof(dst.sin_addr)); 262 dst.sin_port = uh->uh_dport; 263 264 n = udp4_realinput(&src, &dst, m, iphlen); 265 #ifdef INET6 266 if (IN_MULTICAST(ip->ip_dst.s_addr) || n == 0) { 267 struct sockaddr_in6 src6, dst6; 268 269 bzero(&src6, sizeof(src6)); 270 src6.sin6_family = AF_INET6; 271 src6.sin6_len = sizeof(struct sockaddr_in6); 272 src6.sin6_addr.s6_addr[10] = src6.sin6_addr.s6_addr[11] = 0xff; 273 bcopy(&ip->ip_src, &src6.sin6_addr.s6_addr[12], 274 sizeof(ip->ip_src)); 275 src6.sin6_port = uh->uh_sport; 276 bzero(&dst6, sizeof(dst6)); 277 dst6.sin6_family = AF_INET6; 278 dst6.sin6_len = sizeof(struct sockaddr_in6); 279 dst6.sin6_addr.s6_addr[10] = dst6.sin6_addr.s6_addr[11] = 0xff; 280 bcopy(&ip->ip_dst, &dst6.sin6_addr.s6_addr[12], 281 sizeof(ip->ip_dst)); 282 dst6.sin6_port = uh->uh_dport; 283 284 n += udp6_realinput(AF_INET, &src6, &dst6, m, iphlen); 285 } 286 #endif 287 288 if (n == 0) { 289 if (m->m_flags & (M_BCAST | M_MCAST)) { 290 udpstat.udps_noportbcast++; 291 goto bad; 292 } 293 udpstat.udps_noport++; 294 #ifdef IPKDB 295 if (checkipkdb(&ip->ip_src, uh->uh_sport, uh->uh_dport, 296 m, iphlen + sizeof(struct udphdr), 297 m->m_pkthdr.len - iphlen - sizeof(struct udphdr))) { 298 /* 299 * It was a debugger connect packet, 300 * just drop it now 301 */ 302 goto bad; 303 } 304 #endif 305 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0); 306 m = NULL; 307 } 308 309 bad: 310 if (m) 311 m_freem(m); 312 } 313 314 #ifdef INET6 315 int 316 udp6_input(mp, offp, proto) 317 struct mbuf **mp; 318 int *offp, proto; 319 { 320 struct mbuf *m = *mp; 321 int off = *offp; 322 struct sockaddr_in6 src, dst; 323 struct ip6_hdr *ip6; 324 struct udphdr *uh; 325 u_int32_t plen, ulen; 326 327 #if defined(NFAITH) && 0 < NFAITH 328 if (m->m_pkthdr.rcvif) { 329 if (m->m_pkthdr.rcvif->if_type == IFT_FAITH) { 330 /* send icmp6 host unreach? */ 331 m_freem(m); 332 return IPPROTO_DONE; 333 } 334 } 335 #endif 336 337 udp6stat.udp6s_ipackets++; 338 339 #ifndef PULLDOWN_TEST 340 IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE); 341 #endif 342 343 ip6 = mtod(m, struct ip6_hdr *); 344 /* check for jumbogram is done in ip6_input. we can trust pkthdr.len */ 345 plen = m->m_pkthdr.len - off; 346 #ifndef PULLDOWN_TEST 347 uh = (struct udphdr *)((caddr_t)ip6 + off); 348 #else 349 IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(struct udphdr)); 350 if (uh == NULL) { 351 ip6stat.ip6s_tooshort++; 352 return IPPROTO_DONE; 353 } 354 #endif 355 ulen = ntohs((u_short)uh->uh_ulen); 356 if (ulen == 0 && plen > 0xffff) 357 ulen = plen; 358 359 if (plen != ulen) { 360 udp6stat.udp6s_badlen++; 361 goto bad; 362 } 363 364 /* destination port of 0 is illegal, based on RFC768. */ 365 if (uh->uh_dport == 0) 366 goto bad; 367 368 /* Be proactive about malicious use of IPv4 mapped address */ 369 if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || 370 IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { 371 /* XXX stat */ 372 goto bad; 373 } 374 375 /* 376 * Checksum extended UDP header and data. 377 */ 378 if (uh->uh_sum == 0) 379 udp6stat.udp6s_nosum++; 380 else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) { 381 udp6stat.udp6s_badsum++; 382 goto bad; 383 } 384 385 /* 386 * Construct source and dst sockaddrs. 387 * Note that ifindex (s6_addr16[1]) is already filled. 388 */ 389 bzero(&src, sizeof(src)); 390 src.sin6_family = AF_INET6; 391 src.sin6_len = sizeof(struct sockaddr_in6); 392 bcopy(&ip6->ip6_src, &src.sin6_addr, sizeof(src.sin6_addr)); 393 if (IN6_IS_SCOPE_LINKLOCAL(&src.sin6_addr)) 394 src.sin6_addr.s6_addr16[1] = 0; 395 if (m->m_pkthdr.rcvif) { 396 if (IN6_IS_SCOPE_LINKLOCAL(&src.sin6_addr)) 397 src.sin6_scope_id = m->m_pkthdr.rcvif->if_index; 398 else 399 src.sin6_scope_id = 0; 400 } 401 src.sin6_port = uh->uh_sport; 402 bzero(&dst, sizeof(dst)); 403 dst.sin6_family = AF_INET6; 404 dst.sin6_len = sizeof(struct sockaddr_in6); 405 bcopy(&ip6->ip6_dst, &dst.sin6_addr, sizeof(dst.sin6_addr)); 406 if (IN6_IS_SCOPE_LINKLOCAL(&dst.sin6_addr)) 407 dst.sin6_addr.s6_addr16[1] = 0; 408 if (m->m_pkthdr.rcvif) { 409 if (IN6_IS_SCOPE_LINKLOCAL(&dst.sin6_addr)) 410 dst.sin6_scope_id = m->m_pkthdr.rcvif->if_index; 411 else 412 dst.sin6_scope_id = 0; 413 } 414 dst.sin6_port = uh->uh_dport; 415 416 if (udp6_realinput(AF_INET6, &src, &dst, m, off) == 0) { 417 if (m->m_flags & M_MCAST) { 418 udp6stat.udp6s_noportmcast++; 419 goto bad; 420 } 421 udp6stat.udp6s_noport++; 422 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0); 423 m = NULL; 424 } 425 426 bad: 427 if (m) 428 m_freem(m); 429 return IPPROTO_DONE; 430 } 431 #endif 432 433 static void 434 udp4_sendup(m, off, src, so) 435 struct mbuf *m; 436 int off; /* offset of data portion */ 437 struct sockaddr *src; 438 struct socket *so; 439 { 440 struct mbuf *opts = NULL; 441 struct mbuf *n; 442 struct inpcb *inp = NULL; 443 #ifdef INET6 444 struct in6pcb *in6p = NULL; 445 #endif 446 447 if (!so) 448 return; 449 switch (so->so_proto->pr_domain->dom_family) { 450 case AF_INET: 451 inp = sotoinpcb(so); 452 break; 453 #ifdef INET6 454 case AF_INET6: 455 in6p = sotoin6pcb(so); 456 break; 457 #endif 458 default: 459 return; 460 } 461 462 #ifdef IPSEC 463 /* check AH/ESP integrity. */ 464 if (so != NULL && ipsec4_in_reject_so(m, so)) { 465 ipsecstat.in_polvio++; 466 return; 467 } 468 #endif /*IPSEC*/ 469 470 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { 471 if (inp && (inp->inp_flags & INP_CONTROLOPTS 472 || so->so_options & SO_TIMESTAMP)) { 473 struct ip *ip = mtod(n, struct ip *); 474 ip_savecontrol(inp, &opts, ip, n); 475 } 476 477 m_adj(n, off); 478 if (sbappendaddr(&so->so_rcv, src, n, 479 opts) == 0) { 480 m_freem(n); 481 if (opts) 482 m_freem(opts); 483 } else 484 sorwakeup(so); 485 } 486 } 487 488 #ifdef INET6 489 static void 490 udp6_sendup(m, off, src, so) 491 struct mbuf *m; 492 int off; /* offset of data portion */ 493 struct sockaddr *src; 494 struct socket *so; 495 { 496 struct mbuf *opts = NULL; 497 struct mbuf *n; 498 struct in6pcb *in6p = NULL; 499 500 if (!so) 501 return; 502 if (so->so_proto->pr_domain->dom_family != AF_INET6) 503 return; 504 in6p = sotoin6pcb(so); 505 506 #ifdef IPSEC 507 /* check AH/ESP integrity. */ 508 if (so != NULL && ipsec6_in_reject_so(m, so)) { 509 ipsec6stat.in_polvio++; 510 return; 511 } 512 #endif /*IPSEC*/ 513 514 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { 515 if (in6p && (in6p->in6p_flags & IN6P_CONTROLOPTS 516 || in6p->in6p_socket->so_options & SO_TIMESTAMP)) { 517 struct ip6_hdr *ip6 = mtod(n, struct ip6_hdr *); 518 ip6_savecontrol(in6p, &opts, ip6, n); 519 } 520 521 m_adj(n, off); 522 if (sbappendaddr(&so->so_rcv, src, n, opts) == 0) { 523 m_freem(n); 524 if (opts) 525 m_freem(opts); 526 udp6stat.udp6s_fullsock++; 527 } else 528 sorwakeup(so); 529 } 530 } 531 #endif 532 533 static int 534 udp4_realinput(src, dst, m, off) 535 struct sockaddr_in *src; 536 struct sockaddr_in *dst; 537 struct mbuf *m; 538 int off; /* offset of udphdr */ 539 { 540 u_int16_t *sport, *dport; 541 int rcvcnt; 542 struct in_addr *src4, *dst4; 543 struct inpcb *inp; 544 545 rcvcnt = 0; 546 off += sizeof(struct udphdr); /* now, offset of payload */ 547 548 if (src->sin_family != AF_INET || dst->sin_family != AF_INET) 549 goto bad; 550 551 src4 = &src->sin_addr; 552 sport = &src->sin_port; 553 dst4 = &dst->sin_addr; 554 dport = &dst->sin_port; 555 556 if (IN_MULTICAST(src4->s_addr) || 557 in_broadcast(*dst4, m->m_pkthdr.rcvif)) { 558 struct inpcb *last; 559 /* 560 * Deliver a multicast or broadcast datagram to *all* sockets 561 * for which the local and remote addresses and ports match 562 * those of the incoming datagram. This allows more than 563 * one process to receive multi/broadcasts on the same port. 564 * (This really ought to be done for unicast datagrams as 565 * well, but that would cause problems with existing 566 * applications that open both address-specific sockets and 567 * a wildcard socket listening to the same port -- they would 568 * end up receiving duplicates of every unicast datagram. 569 * Those applications open the multiple sockets to overcome an 570 * inadequacy of the UDP socket interface, but for backwards 571 * compatibility we avoid the problem here rather than 572 * fixing the interface. Maybe 4.5BSD will remedy this?) 573 */ 574 575 /* 576 * KAME note: usually we drop udpiphdr from mbuf here. 577 * we need udpiphdr for iPsec processing so we do that later. 578 */ 579 /* 580 * Locate pcb(s) for datagram. 581 */ 582 for (inp = udbtable.inpt_queue.cqh_first; 583 inp != (struct inpcb *)&udbtable.inpt_queue; 584 inp = inp->inp_queue.cqe_next) { 585 if (inp->inp_lport != *dport) 586 continue; 587 if (!in_nullhost(inp->inp_laddr)) { 588 if (!in_hosteq(inp->inp_laddr, *dst4)) 589 continue; 590 } 591 if (!in_nullhost(inp->inp_faddr)) { 592 if (!in_hosteq(inp->inp_faddr, *src4) || 593 inp->inp_fport != *sport) 594 continue; 595 } 596 597 last = inp; 598 udp4_sendup(m, off, (struct sockaddr *)src, 599 inp->inp_socket); 600 rcvcnt++; 601 602 /* 603 * Don't look for additional matches if this one does 604 * not have either the SO_REUSEPORT or SO_REUSEADDR 605 * socket options set. This heuristic avoids searching 606 * through all pcbs in the common case of a non-shared 607 * port. It assumes that an application will never 608 * clear these options after setting them. 609 */ 610 if ((inp->inp_socket->so_options & 611 (SO_REUSEPORT|SO_REUSEADDR)) == 0) 612 break; 613 } 614 615 #if 0 616 if (last == NULL) { 617 /* 618 * No matching pcb found; discard datagram. 619 * (No need to send an ICMP Port Unreachable 620 * for a broadcast or multicast datgram.) 621 */ 622 udpstat.udps_noportbcast++; 623 goto bad; 624 } 625 #endif 626 } else { 627 /* 628 * Locate pcb for datagram. 629 */ 630 inp = in_pcblookup_connect(&udbtable, *src4, *sport, *dst4, *dport); 631 if (inp == 0) { 632 ++udpstat.udps_pcbhashmiss; 633 inp = in_pcblookup_bind(&udbtable, *dst4, *dport); 634 if (inp == 0) { 635 #if 0 636 struct mbuf *n; 637 638 if (m->m_flags & (M_BCAST | M_MCAST)) { 639 udpstat.udps_noportbcast++; 640 goto bad; 641 } 642 udpstat.udps_noport++; 643 #ifdef IPKDB 644 if (checkipkdb(src4, *sport, *dport, m, off, 645 m->m_pkthdr.len - off)) { 646 /* 647 * It was a debugger connect packet, 648 * just drop it now 649 */ 650 goto bad; 651 } 652 #endif 653 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { 654 icmp_error(n, ICMP_UNREACH, 655 ICMP_UNREACH_PORT, 0, 0); 656 } 657 #endif 658 return rcvcnt; 659 } 660 } 661 662 udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket); 663 rcvcnt++; 664 } 665 666 bad: 667 return rcvcnt; 668 } 669 670 #ifdef INET6 671 static int 672 in6_mcmatch(in6p, ia6, ifp) 673 struct in6pcb *in6p; 674 struct in6_addr *ia6; 675 struct ifnet *ifp; 676 { 677 struct ip6_moptions *im6o = in6p->in6p_moptions; 678 struct in6_multi_mship *imm; 679 680 if (im6o == NULL) 681 return 0; 682 683 for (imm = im6o->im6o_memberships.lh_first; imm != NULL; 684 imm = imm->i6mm_chain.le_next) { 685 if ((ifp == NULL || 686 imm->i6mm_maddr->in6m_ifp == ifp) && 687 IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr, 688 ia6)) 689 return 1; 690 } 691 return 0; 692 } 693 694 static int 695 udp6_realinput(af, src, dst, m, off) 696 int af; /* af on packet */ 697 struct sockaddr_in6 *src; 698 struct sockaddr_in6 *dst; 699 struct mbuf *m; 700 int off; /* offset of udphdr */ 701 { 702 u_int16_t *sport, *dport; 703 int rcvcnt; 704 struct in6_addr *src6, *dst6; 705 struct in_addr *src4; 706 struct in6pcb *in6p; 707 708 rcvcnt = 0; 709 off += sizeof(struct udphdr); /* now, offset of payload */ 710 711 if (af != AF_INET && af != AF_INET6) 712 goto bad; 713 if (src->sin6_family != AF_INET6 || dst->sin6_family != AF_INET6) 714 goto bad; 715 716 src6 = &src->sin6_addr; 717 sport = &src->sin6_port; 718 dst6 = &dst->sin6_addr; 719 dport = &dst->sin6_port; 720 src4 = (struct in_addr *)&src->sin6_addr.s6_addr32[12]; 721 722 if (IN6_IS_ADDR_MULTICAST(dst6) 723 || (af == AF_INET && IN_MULTICAST(src4->s_addr))) { 724 struct in6pcb *last; 725 /* 726 * Deliver a multicast or broadcast datagram to *all* sockets 727 * for which the local and remote addresses and ports match 728 * those of the incoming datagram. This allows more than 729 * one process to receive multi/broadcasts on the same port. 730 * (This really ought to be done for unicast datagrams as 731 * well, but that would cause problems with existing 732 * applications that open both address-specific sockets and 733 * a wildcard socket listening to the same port -- they would 734 * end up receiving duplicates of every unicast datagram. 735 * Those applications open the multiple sockets to overcome an 736 * inadequacy of the UDP socket interface, but for backwards 737 * compatibility we avoid the problem here rather than 738 * fixing the interface. Maybe 4.5BSD will remedy this?) 739 */ 740 741 /* 742 * KAME note: usually we drop udpiphdr from mbuf here. 743 * we need udpiphdr for iPsec processing so we do that later. 744 */ 745 /* 746 * Locate pcb(s) for datagram. 747 */ 748 for (in6p = udb6.in6p_next; in6p != &udb6; 749 in6p = in6p->in6p_next) { 750 if (in6p->in6p_lport != *dport) 751 continue; 752 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { 753 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, dst6) 754 && !in6_mcmatch(in6p, dst6, m->m_pkthdr.rcvif)) 755 continue; 756 } 757 #ifndef INET6_BINDV6ONLY 758 else { 759 if (IN6_IS_ADDR_V4MAPPED(dst6) 760 && (in6p->in6p_flags & IN6P_BINDV6ONLY)) 761 continue; 762 } 763 #endif 764 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 765 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, src6) 766 || in6p->in6p_fport != *sport) 767 continue; 768 } 769 #ifndef INET6_BINDV6ONLY 770 else { 771 if (IN6_IS_ADDR_V4MAPPED(src6) 772 && (in6p->in6p_flags & IN6P_BINDV6ONLY)) 773 continue; 774 } 775 #endif 776 777 last = in6p; 778 udp6_sendup(m, off, (struct sockaddr *)src, 779 in6p->in6p_socket); 780 rcvcnt++; 781 782 /* 783 * Don't look for additional matches if this one does 784 * not have either the SO_REUSEPORT or SO_REUSEADDR 785 * socket options set. This heuristic avoids searching 786 * through all pcbs in the common case of a non-shared 787 * port. It assumes that an application will never 788 * clear these options after setting them. 789 */ 790 if ((in6p->in6p_socket->so_options & 791 (SO_REUSEPORT|SO_REUSEADDR)) == 0) 792 break; 793 } 794 795 #if 0 796 if (last == NULL) { 797 /* 798 * No matching pcb found; discard datagram. 799 * (No need to send an ICMP Port Unreachable 800 * for a broadcast or multicast datgram.) 801 */ 802 switch (af) { 803 case AF_INET: 804 udpstat.udps_noportbcast++; 805 break; 806 case AF_INET6: 807 udp6stat.udp6s_noportmcast++; 808 break; 809 } 810 goto bad; 811 } 812 #endif 813 } else { 814 /* 815 * Locate pcb for datagram. 816 */ 817 in6p = in6_pcblookup_connect(&udb6, src6, *sport, 818 dst6, *dport, 0); 819 if (in6p == 0) { 820 ++udpstat.udps_pcbhashmiss; 821 in6p = in6_pcblookup_bind(&udb6, dst6, *dport, 0); 822 if (in6p == 0) { 823 #if 0 824 struct mbuf *n; 825 n = m_copy(m, 0, M_COPYALL); 826 switch (af) { 827 case AF_INET: 828 if (m->m_flags & (M_BCAST | M_MCAST)) { 829 udpstat.udps_noportbcast++; 830 goto bad; 831 } 832 udpstat.udps_noport++; 833 if (n != NULL) 834 icmp_error(n, ICMP_UNREACH, 835 ICMP_UNREACH_PORT, 0, 0); 836 break; 837 case AF_INET6: 838 if (m->m_flags & M_MCAST) { 839 udp6stat.udp6s_noportmcast++; 840 goto bad; 841 } 842 udp6stat.udp6s_noport++; 843 if (n != NULL) 844 icmp6_error(n, ICMP6_DST_UNREACH, 845 ICMP6_DST_UNREACH_NOPORT, 0); 846 break; 847 } 848 #endif 849 850 return rcvcnt; 851 } 852 } 853 854 udp6_sendup(m, off, (struct sockaddr *)src, in6p->in6p_socket); 855 rcvcnt++; 856 } 857 858 bad: 859 return rcvcnt; 860 } 861 #endif 862 863 #else /*UDP6*/ 864 865 void 866 #if __STDC__ 867 udp_input(struct mbuf *m, ...) 868 #else 869 udp_input(m, va_alist) 870 struct mbuf *m; 871 va_dcl 872 #endif 873 { 874 int proto; 875 struct ip *ip; 876 struct udphdr *uh; 877 struct inpcb *inp; 878 struct mbuf *opts = 0; 879 int len; 880 struct ip save_ip; 881 int iphlen; 882 va_list ap; 883 struct sockaddr_in udpsrc; 884 struct sockaddr *sa; 885 886 va_start(ap, m); 887 iphlen = va_arg(ap, int); 888 proto = va_arg(ap, int); 889 va_end(ap); 890 891 udpstat.udps_ipackets++; 892 893 /* 894 * Strip IP options, if any; should skip this, 895 * make available to user, and use on returned packets, 896 * but we don't yet have a way to check the checksum 897 * with options still present. 898 */ 899 if (iphlen > sizeof (struct ip)) { 900 ip_stripoptions(m, (struct mbuf *)0); 901 iphlen = sizeof(struct ip); 902 } 903 904 /* 905 * Get IP and UDP header together in first mbuf. 906 */ 907 ip = mtod(m, struct ip *); 908 if (m->m_len < iphlen + sizeof(struct udphdr)) { 909 if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) { 910 udpstat.udps_hdrops++; 911 return; 912 } 913 ip = mtod(m, struct ip *); 914 } 915 uh = (struct udphdr *)((caddr_t)ip + iphlen); 916 917 /* destination port of 0 is illegal, based on RFC768. */ 918 if (uh->uh_dport == 0) 919 goto bad; 920 921 /* 922 * Make mbuf data length reflect UDP length. 923 * If not enough data to reflect UDP length, drop. 924 */ 925 len = ntohs((u_int16_t)uh->uh_ulen); 926 if (ip->ip_len != iphlen + len) { 927 if (ip->ip_len < iphlen + len) { 928 udpstat.udps_badlen++; 929 goto bad; 930 } 931 m_adj(m, iphlen + len - ip->ip_len); 932 } 933 /* 934 * Save a copy of the IP header in case we want restore it 935 * for sending an ICMP error message in response. 936 */ 937 save_ip = *ip; 938 939 /* 940 * Checksum extended UDP header and data. 941 */ 942 if (uh->uh_sum) { 943 bzero(((struct ipovly *)ip)->ih_x1, 944 sizeof ((struct ipovly *)ip)->ih_x1); 945 ((struct ipovly *)ip)->ih_len = uh->uh_ulen; 946 if (in_cksum(m, len + sizeof (struct ip)) != 0) { 947 udpstat.udps_badsum++; 948 m_freem(m); 949 return; 950 } 951 } 952 953 /* 954 * Construct sockaddr format source address. 955 */ 956 udpsrc.sin_family = AF_INET; 957 udpsrc.sin_len = sizeof(struct sockaddr_in); 958 udpsrc.sin_addr = ip->ip_src; 959 udpsrc.sin_port = uh->uh_sport; 960 bzero((caddr_t)udpsrc.sin_zero, sizeof(udpsrc.sin_zero)); 961 962 if (IN_MULTICAST(ip->ip_dst.s_addr) || 963 in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) { 964 struct inpcb *last; 965 /* 966 * Deliver a multicast or broadcast datagram to *all* sockets 967 * for which the local and remote addresses and ports match 968 * those of the incoming datagram. This allows more than 969 * one process to receive multi/broadcasts on the same port. 970 * (This really ought to be done for unicast datagrams as 971 * well, but that would cause problems with existing 972 * applications that open both address-specific sockets and 973 * a wildcard socket listening to the same port -- they would 974 * end up receiving duplicates of every unicast datagram. 975 * Those applications open the multiple sockets to overcome an 976 * inadequacy of the UDP socket interface, but for backwards 977 * compatibility we avoid the problem here rather than 978 * fixing the interface. Maybe 4.5BSD will remedy this?) 979 */ 980 981 iphlen += sizeof(struct udphdr); 982 /* 983 * KAME note: usually we drop udpiphdr from mbuf here. 984 * we need udpiphdr for iPsec processing so we do that later. 985 */ 986 /* 987 * Locate pcb(s) for datagram. 988 * (Algorithm copied from raw_intr().) 989 */ 990 last = NULL; 991 for (inp = udbtable.inpt_queue.cqh_first; 992 inp != (struct inpcb *)&udbtable.inpt_queue; 993 inp = inp->inp_queue.cqe_next) { 994 if (inp->inp_lport != uh->uh_dport) 995 continue; 996 if (!in_nullhost(inp->inp_laddr)) { 997 if (!in_hosteq(inp->inp_laddr, ip->ip_dst)) 998 continue; 999 } 1000 if (!in_nullhost(inp->inp_faddr)) { 1001 if (!in_hosteq(inp->inp_faddr, ip->ip_src) || 1002 inp->inp_fport != uh->uh_sport) 1003 continue; 1004 } 1005 1006 if (last != NULL) { 1007 struct mbuf *n; 1008 1009 #ifdef IPSEC 1010 /* check AH/ESP integrity. */ 1011 if (last != NULL && ipsec4_in_reject(m, last)) { 1012 ipsecstat.in_polvio++; 1013 /* do not inject data to pcb */ 1014 } else 1015 #endif /*IPSEC*/ 1016 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { 1017 if (last->inp_flags & INP_CONTROLOPTS 1018 || last->inp_socket->so_options & 1019 SO_TIMESTAMP) { 1020 ip_savecontrol(last, &opts, 1021 ip, n); 1022 } 1023 m_adj(n, iphlen); 1024 sa = (struct sockaddr *)&udpsrc; 1025 if (sbappendaddr( 1026 &last->inp_socket->so_rcv, 1027 sa, n, opts) == 0) { 1028 m_freem(n); 1029 if (opts) 1030 m_freem(opts); 1031 } else 1032 sorwakeup(last->inp_socket); 1033 opts = 0; 1034 } 1035 } 1036 last = inp; 1037 /* 1038 * Don't look for additional matches if this one does 1039 * not have either the SO_REUSEPORT or SO_REUSEADDR 1040 * socket options set. This heuristic avoids searching 1041 * through all pcbs in the common case of a non-shared 1042 * port. It * assumes that an application will never 1043 * clear these options after setting them. 1044 */ 1045 if ((last->inp_socket->so_options & 1046 (SO_REUSEPORT|SO_REUSEADDR)) == 0) 1047 break; 1048 } 1049 1050 if (last == NULL) { 1051 /* 1052 * No matching pcb found; discard datagram. 1053 * (No need to send an ICMP Port Unreachable 1054 * for a broadcast or multicast datgram.) 1055 */ 1056 udpstat.udps_noportbcast++; 1057 goto bad; 1058 } 1059 #ifdef IPSEC 1060 /* check AH/ESP integrity. */ 1061 if (last != NULL && ipsec4_in_reject(m, last)) { 1062 ipsecstat.in_polvio++; 1063 goto bad; 1064 } 1065 #endif /*IPSEC*/ 1066 if (last->inp_flags & INP_CONTROLOPTS || 1067 last->inp_socket->so_options & SO_TIMESTAMP) 1068 ip_savecontrol(last, &opts, ip, m); 1069 m->m_len -= iphlen; 1070 m->m_pkthdr.len -= iphlen; 1071 m->m_data += iphlen; 1072 sa = (struct sockaddr *)&udpsrc; 1073 if (sbappendaddr(&last->inp_socket->so_rcv, sa, m, opts) == 0) { 1074 udpstat.udps_fullsock++; 1075 goto bad; 1076 } 1077 sorwakeup(last->inp_socket); 1078 return; 1079 } 1080 /* 1081 * Locate pcb for datagram. 1082 */ 1083 inp = in_pcblookup_connect(&udbtable, ip->ip_src, uh->uh_sport, 1084 ip->ip_dst, uh->uh_dport); 1085 if (inp == 0) { 1086 ++udpstat.udps_pcbhashmiss; 1087 inp = in_pcblookup_bind(&udbtable, ip->ip_dst, uh->uh_dport); 1088 if (inp == 0) { 1089 if (m->m_flags & (M_BCAST | M_MCAST)) { 1090 udpstat.udps_noportbcast++; 1091 goto bad; 1092 } 1093 udpstat.udps_noport++; 1094 *ip = save_ip; 1095 #ifdef IPKDB 1096 if (checkipkdb(&ip->ip_src, 1097 uh->uh_sport, 1098 uh->uh_dport, 1099 m, 1100 iphlen + sizeof(struct udphdr), 1101 len - sizeof(struct udphdr))) 1102 /* It was a debugger connect packet, just drop it now */ 1103 goto bad; 1104 #endif 1105 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0); 1106 return; 1107 } 1108 } 1109 #ifdef IPSEC 1110 if (inp != NULL && ipsec4_in_reject(m, inp)) { 1111 ipsecstat.in_polvio++; 1112 goto bad; 1113 } 1114 #endif /*IPSEC*/ 1115 1116 /* 1117 * Stuff source address and datagram in user buffer. 1118 */ 1119 if (inp->inp_flags & INP_CONTROLOPTS || 1120 inp->inp_socket->so_options & SO_TIMESTAMP) 1121 ip_savecontrol(inp, &opts, ip, m); 1122 iphlen += sizeof(struct udphdr); 1123 m->m_len -= iphlen; 1124 m->m_pkthdr.len -= iphlen; 1125 m->m_data += iphlen; 1126 sa = (struct sockaddr *)&udpsrc; 1127 if (sbappendaddr(&inp->inp_socket->so_rcv, sa, m, opts) == 0) { 1128 udpstat.udps_fullsock++; 1129 goto bad; 1130 } 1131 sorwakeup(inp->inp_socket); 1132 return; 1133 bad: 1134 m_freem(m); 1135 if (opts) 1136 m_freem(opts); 1137 } 1138 #endif /*UDP6*/ 1139 1140 /* 1141 * Notify a udp user of an asynchronous error; 1142 * just wake up so that he can collect error status. 1143 */ 1144 static void 1145 udp_notify(inp, errno) 1146 struct inpcb *inp; 1147 int errno; 1148 { 1149 1150 inp->inp_socket->so_error = errno; 1151 sorwakeup(inp->inp_socket); 1152 sowwakeup(inp->inp_socket); 1153 } 1154 1155 void * 1156 udp_ctlinput(cmd, sa, v) 1157 int cmd; 1158 struct sockaddr *sa; 1159 void *v; 1160 { 1161 struct ip *ip = v; 1162 struct udphdr *uh; 1163 void (*notify) __P((struct inpcb *, int)) = udp_notify; 1164 int errno; 1165 1166 if (sa->sa_family != AF_INET 1167 || sa->sa_len != sizeof(struct sockaddr_in)) 1168 return NULL; 1169 if ((unsigned)cmd >= PRC_NCMDS) 1170 return NULL; 1171 errno = inetctlerrmap[cmd]; 1172 if (PRC_IS_REDIRECT(cmd)) 1173 notify = in_rtchange, ip = 0; 1174 else if (cmd == PRC_HOSTDEAD) 1175 ip = 0; 1176 else if (errno == 0) 1177 return NULL; 1178 if (ip) { 1179 uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2)); 1180 in_pcbnotify(&udbtable, satosin(sa)->sin_addr, uh->uh_dport, 1181 ip->ip_src, uh->uh_sport, errno, notify); 1182 1183 /* XXX mapped address case */ 1184 } else 1185 in_pcbnotifyall(&udbtable, satosin(sa)->sin_addr, errno, 1186 notify); 1187 return NULL; 1188 } 1189 1190 int 1191 #if __STDC__ 1192 udp_output(struct mbuf *m, ...) 1193 #else 1194 udp_output(m, va_alist) 1195 struct mbuf *m; 1196 va_dcl 1197 #endif 1198 { 1199 struct inpcb *inp; 1200 struct udpiphdr *ui; 1201 int len = m->m_pkthdr.len; 1202 int error = 0; 1203 va_list ap; 1204 1205 va_start(ap, m); 1206 inp = va_arg(ap, struct inpcb *); 1207 va_end(ap); 1208 1209 /* 1210 * Calculate data length and get a mbuf 1211 * for UDP and IP headers. 1212 */ 1213 M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT); 1214 if (m == 0) { 1215 error = ENOBUFS; 1216 goto release; 1217 } 1218 1219 /* 1220 * Compute the packet length of the IP header, and 1221 * punt if the length looks bogus. 1222 */ 1223 if ((len + sizeof(struct udpiphdr)) > IP_MAXPACKET) { 1224 error = EMSGSIZE; 1225 goto release; 1226 } 1227 1228 /* 1229 * Fill in mbuf with extended UDP header 1230 * and addresses and length put into network format. 1231 */ 1232 ui = mtod(m, struct udpiphdr *); 1233 bzero(ui->ui_x1, sizeof ui->ui_x1); 1234 ui->ui_pr = IPPROTO_UDP; 1235 ui->ui_len = htons((u_int16_t)len + sizeof (struct udphdr)); 1236 ui->ui_src = inp->inp_laddr; 1237 ui->ui_dst = inp->inp_faddr; 1238 ui->ui_sport = inp->inp_lport; 1239 ui->ui_dport = inp->inp_fport; 1240 ui->ui_ulen = ui->ui_len; 1241 1242 /* 1243 * Stuff checksum and output datagram. 1244 */ 1245 ui->ui_sum = 0; 1246 if (udpcksum) { 1247 if ((ui->ui_sum = in_cksum(m, sizeof (struct udpiphdr) + len)) == 0) 1248 ui->ui_sum = 0xffff; 1249 } 1250 ((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len; 1251 ((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */ 1252 ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */ 1253 udpstat.udps_opackets++; 1254 1255 #ifdef IPSEC 1256 ipsec_setsocket(m, inp->inp_socket); 1257 #endif /*IPSEC*/ 1258 1259 return (ip_output(m, inp->inp_options, &inp->inp_route, 1260 inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST), 1261 inp->inp_moptions)); 1262 1263 release: 1264 m_freem(m); 1265 return (error); 1266 } 1267 1268 int udp_sendspace = 9216; /* really max datagram size */ 1269 int udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in)); 1270 /* 40 1K datagrams */ 1271 1272 /*ARGSUSED*/ 1273 int 1274 udp_usrreq(so, req, m, nam, control, p) 1275 struct socket *so; 1276 int req; 1277 struct mbuf *m, *nam, *control; 1278 struct proc *p; 1279 { 1280 struct inpcb *inp; 1281 int s; 1282 int error = 0; 1283 1284 if (req == PRU_CONTROL) 1285 return (in_control(so, (long)m, (caddr_t)nam, 1286 (struct ifnet *)control, p)); 1287 1288 if (req == PRU_PURGEIF) { 1289 in_purgeif((struct ifnet *)control); 1290 in_pcbpurgeif(&udbtable, (struct ifnet *)control); 1291 return (0); 1292 } 1293 1294 s = splsoftnet(); 1295 inp = sotoinpcb(so); 1296 #ifdef DIAGNOSTIC 1297 if (req != PRU_SEND && req != PRU_SENDOOB && control) 1298 panic("udp_usrreq: unexpected control mbuf"); 1299 #endif 1300 if (inp == 0 && req != PRU_ATTACH) { 1301 error = EINVAL; 1302 goto release; 1303 } 1304 1305 /* 1306 * Note: need to block udp_input while changing 1307 * the udp pcb queue and/or pcb addresses. 1308 */ 1309 switch (req) { 1310 1311 case PRU_ATTACH: 1312 if (inp != 0) { 1313 error = EISCONN; 1314 break; 1315 } 1316 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 1317 error = soreserve(so, udp_sendspace, udp_recvspace); 1318 if (error) 1319 break; 1320 } 1321 error = in_pcballoc(so, &udbtable); 1322 if (error) 1323 break; 1324 inp = sotoinpcb(so); 1325 inp->inp_ip.ip_ttl = ip_defttl; 1326 #ifdef IPSEC 1327 error = ipsec_init_policy(so, &inp->inp_sp); 1328 if (error != 0) { 1329 in_pcbdetach(inp); 1330 break; 1331 } 1332 #endif /*IPSEC*/ 1333 break; 1334 1335 case PRU_DETACH: 1336 in_pcbdetach(inp); 1337 break; 1338 1339 case PRU_BIND: 1340 error = in_pcbbind(inp, nam, p); 1341 break; 1342 1343 case PRU_LISTEN: 1344 error = EOPNOTSUPP; 1345 break; 1346 1347 case PRU_CONNECT: 1348 error = in_pcbconnect(inp, nam); 1349 if (error) 1350 break; 1351 soisconnected(so); 1352 break; 1353 1354 case PRU_CONNECT2: 1355 error = EOPNOTSUPP; 1356 break; 1357 1358 case PRU_DISCONNECT: 1359 /*soisdisconnected(so);*/ 1360 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 1361 in_pcbdisconnect(inp); 1362 inp->inp_laddr = zeroin_addr; /* XXX */ 1363 in_pcbstate(inp, INP_BOUND); /* XXX */ 1364 break; 1365 1366 case PRU_SHUTDOWN: 1367 socantsendmore(so); 1368 break; 1369 1370 case PRU_RCVD: 1371 error = EOPNOTSUPP; 1372 break; 1373 1374 case PRU_SEND: 1375 if (control && control->m_len) { 1376 m_freem(control); 1377 m_freem(m); 1378 error = EINVAL; 1379 break; 1380 } 1381 { 1382 struct in_addr laddr; /* XXX */ 1383 1384 if (nam) { 1385 laddr = inp->inp_laddr; /* XXX */ 1386 if ((so->so_state & SS_ISCONNECTED) != 0) { 1387 error = EISCONN; 1388 goto die; 1389 } 1390 error = in_pcbconnect(inp, nam); 1391 if (error) { 1392 die: 1393 m_freem(m); 1394 break; 1395 } 1396 } else { 1397 if ((so->so_state & SS_ISCONNECTED) == 0) { 1398 error = ENOTCONN; 1399 goto die; 1400 } 1401 } 1402 error = udp_output(m, inp); 1403 if (nam) { 1404 in_pcbdisconnect(inp); 1405 inp->inp_laddr = laddr; /* XXX */ 1406 in_pcbstate(inp, INP_BOUND); /* XXX */ 1407 } 1408 } 1409 break; 1410 1411 case PRU_SENSE: 1412 /* 1413 * stat: don't bother with a blocksize. 1414 */ 1415 splx(s); 1416 return (0); 1417 1418 case PRU_RCVOOB: 1419 error = EOPNOTSUPP; 1420 break; 1421 1422 case PRU_SENDOOB: 1423 m_freem(control); 1424 m_freem(m); 1425 error = EOPNOTSUPP; 1426 break; 1427 1428 case PRU_SOCKADDR: 1429 in_setsockaddr(inp, nam); 1430 break; 1431 1432 case PRU_PEERADDR: 1433 in_setpeeraddr(inp, nam); 1434 break; 1435 1436 default: 1437 panic("udp_usrreq"); 1438 } 1439 1440 release: 1441 splx(s); 1442 return (error); 1443 } 1444 1445 /* 1446 * Sysctl for udp variables. 1447 */ 1448 int 1449 udp_sysctl(name, namelen, oldp, oldlenp, newp, newlen) 1450 int *name; 1451 u_int namelen; 1452 void *oldp; 1453 size_t *oldlenp; 1454 void *newp; 1455 size_t newlen; 1456 { 1457 /* All sysctl names at this level are terminal. */ 1458 if (namelen != 1) 1459 return (ENOTDIR); 1460 1461 switch (name[0]) { 1462 case UDPCTL_CHECKSUM: 1463 return (sysctl_int(oldp, oldlenp, newp, newlen, &udpcksum)); 1464 case UDPCTL_SENDSPACE: 1465 return (sysctl_int(oldp, oldlenp, newp, newlen, 1466 &udp_sendspace)); 1467 case UDPCTL_RECVSPACE: 1468 return (sysctl_int(oldp, oldlenp, newp, newlen, 1469 &udp_recvspace)); 1470 default: 1471 return (ENOPROTOOPT); 1472 } 1473 /* NOTREACHED */ 1474 } 1475
Indexes created Fri Sep 26 20:09:58 GMT 2025