udp_usrreq.c revision 1.59
1 /* $NetBSD: udp_usrreq.c,v 1.59 2000/02/01 22:52:10 thorpej Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1982, 1986, 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 #ifndef PULLDOWN_TEST 244 struct ip save_ip; 245 246 /* 247 * Save a copy of the IP header in case we want restore it 248 * for sending an ICMP error message in response. 249 */ 250 save_ip = *ip; 251 252 bzero(((struct ipovly *)ip)->ih_x1, 253 sizeof ((struct ipovly *)ip)->ih_x1); 254 ((struct ipovly *)ip)->ih_len = uh->uh_ulen; 255 if (in_cksum(m, len + sizeof (struct ip)) != 0) { 256 udpstat.udps_badsum++; 257 m_freem(m); 258 return; 259 } 260 261 *ip = save_ip; 262 #else 263 if (in4_cksum(m, IPPROTO_UDP, iphlen, len) != 0) { 264 udpstat.udps_badsum++; 265 m_freem(m); 266 return; 267 } 268 #endif 269 } 270 271 /* construct source and dst sockaddrs. */ 272 bzero(&src, sizeof(src)); 273 src.sin_family = AF_INET; 274 src.sin_len = sizeof(struct sockaddr_in); 275 bcopy(&ip->ip_src, &src.sin_addr, sizeof(src.sin_addr)); 276 src.sin_port = uh->uh_sport; 277 bzero(&dst, sizeof(dst)); 278 dst.sin_family = AF_INET; 279 dst.sin_len = sizeof(struct sockaddr_in); 280 bcopy(&ip->ip_dst, &dst.sin_addr, sizeof(dst.sin_addr)); 281 dst.sin_port = uh->uh_dport; 282 283 n = udp4_realinput(&src, &dst, m, iphlen); 284 #ifdef INET6 285 if (IN_MULTICAST(ip->ip_dst.s_addr) || n == 0) { 286 struct sockaddr_in6 src6, dst6; 287 288 bzero(&src6, sizeof(src6)); 289 src6.sin6_family = AF_INET6; 290 src6.sin6_len = sizeof(struct sockaddr_in6); 291 src6.sin6_addr.s6_addr[10] = src6.sin6_addr.s6_addr[11] = 0xff; 292 bcopy(&ip->ip_src, &src6.sin6_addr.s6_addr[12], 293 sizeof(ip->ip_src)); 294 src6.sin6_port = uh->uh_sport; 295 bzero(&dst6, sizeof(dst6)); 296 dst6.sin6_family = AF_INET6; 297 dst6.sin6_len = sizeof(struct sockaddr_in6); 298 dst6.sin6_addr.s6_addr[10] = dst6.sin6_addr.s6_addr[11] = 0xff; 299 bcopy(&ip->ip_dst, &dst6.sin6_addr.s6_addr[12], 300 sizeof(ip->ip_dst)); 301 dst6.sin6_port = uh->uh_dport; 302 303 n += udp6_realinput(AF_INET, &src6, &dst6, m, iphlen); 304 } 305 #endif 306 307 if (n == 0) { 308 udpstat.udps_noport++; 309 if (m->m_flags & (M_BCAST | M_MCAST)) { 310 udpstat.udps_noportbcast++; 311 goto bad; 312 } 313 #if NIPKDB > 0 314 if (checkipkdb(&ip->ip_src, uh->uh_sport, uh->uh_dport, 315 m, iphlen + sizeof(struct udphdr), 316 m->m_pkthdr.len - iphlen - sizeof(struct udphdr))) { 317 /* 318 * It was a debugger connect packet, 319 * just drop it now 320 */ 321 goto bad; 322 } 323 #endif 324 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0); 325 m = NULL; 326 } 327 328 bad: 329 if (m) 330 m_freem(m); 331 } 332 333 #ifdef INET6 334 int 335 udp6_input(mp, offp, proto) 336 struct mbuf **mp; 337 int *offp, proto; 338 { 339 struct mbuf *m = *mp; 340 int off = *offp; 341 struct sockaddr_in6 src, dst; 342 struct ip6_hdr *ip6; 343 struct udphdr *uh; 344 u_int32_t plen, ulen; 345 346 #if defined(NFAITH) && 0 < NFAITH 347 if (m->m_pkthdr.rcvif) { 348 if (m->m_pkthdr.rcvif->if_type == IFT_FAITH) { 349 /* send icmp6 host unreach? */ 350 m_freem(m); 351 return IPPROTO_DONE; 352 } 353 } 354 #endif 355 356 udp6stat.udp6s_ipackets++; 357 358 #ifndef PULLDOWN_TEST 359 IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE); 360 #endif 361 362 ip6 = mtod(m, struct ip6_hdr *); 363 /* check for jumbogram is done in ip6_input. we can trust pkthdr.len */ 364 plen = m->m_pkthdr.len - off; 365 #ifndef PULLDOWN_TEST 366 uh = (struct udphdr *)((caddr_t)ip6 + off); 367 #else 368 IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(struct udphdr)); 369 if (uh == NULL) { 370 ip6stat.ip6s_tooshort++; 371 return IPPROTO_DONE; 372 } 373 #endif 374 ulen = ntohs((u_short)uh->uh_ulen); 375 if (ulen == 0 && plen > 0xffff) 376 ulen = plen; 377 378 if (plen != ulen) { 379 udp6stat.udp6s_badlen++; 380 goto bad; 381 } 382 383 /* destination port of 0 is illegal, based on RFC768. */ 384 if (uh->uh_dport == 0) 385 goto bad; 386 387 /* Be proactive about malicious use of IPv4 mapped address */ 388 if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || 389 IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { 390 /* XXX stat */ 391 goto bad; 392 } 393 394 /* 395 * Checksum extended UDP header and data. 396 */ 397 if (uh->uh_sum == 0) 398 udp6stat.udp6s_nosum++; 399 else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) { 400 udp6stat.udp6s_badsum++; 401 goto bad; 402 } 403 404 /* 405 * Construct source and dst sockaddrs. 406 * Note that ifindex (s6_addr16[1]) is already filled. 407 */ 408 bzero(&src, sizeof(src)); 409 src.sin6_family = AF_INET6; 410 src.sin6_len = sizeof(struct sockaddr_in6); 411 bcopy(&ip6->ip6_src, &src.sin6_addr, sizeof(src.sin6_addr)); 412 if (IN6_IS_SCOPE_LINKLOCAL(&src.sin6_addr)) 413 src.sin6_addr.s6_addr16[1] = 0; 414 if (m->m_pkthdr.rcvif) { 415 if (IN6_IS_SCOPE_LINKLOCAL(&src.sin6_addr)) 416 src.sin6_scope_id = m->m_pkthdr.rcvif->if_index; 417 else 418 src.sin6_scope_id = 0; 419 } 420 src.sin6_port = uh->uh_sport; 421 bzero(&dst, sizeof(dst)); 422 dst.sin6_family = AF_INET6; 423 dst.sin6_len = sizeof(struct sockaddr_in6); 424 bcopy(&ip6->ip6_dst, &dst.sin6_addr, sizeof(dst.sin6_addr)); 425 if (IN6_IS_SCOPE_LINKLOCAL(&dst.sin6_addr)) 426 dst.sin6_addr.s6_addr16[1] = 0; 427 if (m->m_pkthdr.rcvif) { 428 if (IN6_IS_SCOPE_LINKLOCAL(&dst.sin6_addr)) 429 dst.sin6_scope_id = m->m_pkthdr.rcvif->if_index; 430 else 431 dst.sin6_scope_id = 0; 432 } 433 dst.sin6_port = uh->uh_dport; 434 435 if (udp6_realinput(AF_INET6, &src, &dst, m, off) == 0) { 436 udp6stat.udp6s_noport++; 437 if (m->m_flags & M_MCAST) { 438 udp6stat.udp6s_noportmcast++; 439 goto bad; 440 } 441 icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0); 442 m = NULL; 443 } 444 445 bad: 446 if (m) 447 m_freem(m); 448 return IPPROTO_DONE; 449 } 450 #endif 451 452 static void 453 udp4_sendup(m, off, src, so) 454 struct mbuf *m; 455 int off; /* offset of data portion */ 456 struct sockaddr *src; 457 struct socket *so; 458 { 459 struct mbuf *opts = NULL; 460 struct mbuf *n; 461 struct inpcb *inp = NULL; 462 #ifdef INET6 463 struct in6pcb *in6p = NULL; 464 #endif 465 466 if (!so) 467 return; 468 switch (so->so_proto->pr_domain->dom_family) { 469 case AF_INET: 470 inp = sotoinpcb(so); 471 break; 472 #ifdef INET6 473 case AF_INET6: 474 in6p = sotoin6pcb(so); 475 break; 476 #endif 477 default: 478 return; 479 } 480 481 #ifdef IPSEC 482 /* check AH/ESP integrity. */ 483 if (so != NULL && ipsec4_in_reject_so(m, so)) { 484 ipsecstat.in_polvio++; 485 return; 486 } 487 #endif /*IPSEC*/ 488 489 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { 490 if (inp && (inp->inp_flags & INP_CONTROLOPTS 491 || so->so_options & SO_TIMESTAMP)) { 492 struct ip *ip = mtod(n, struct ip *); 493 ip_savecontrol(inp, &opts, ip, n); 494 } 495 496 m_adj(n, off); 497 if (sbappendaddr(&so->so_rcv, src, n, 498 opts) == 0) { 499 m_freem(n); 500 if (opts) 501 m_freem(opts); 502 } else 503 sorwakeup(so); 504 } 505 } 506 507 #ifdef INET6 508 static void 509 udp6_sendup(m, off, src, so) 510 struct mbuf *m; 511 int off; /* offset of data portion */ 512 struct sockaddr *src; 513 struct socket *so; 514 { 515 struct mbuf *opts = NULL; 516 struct mbuf *n; 517 struct in6pcb *in6p = NULL; 518 519 if (!so) 520 return; 521 if (so->so_proto->pr_domain->dom_family != AF_INET6) 522 return; 523 in6p = sotoin6pcb(so); 524 525 #ifdef IPSEC 526 /* check AH/ESP integrity. */ 527 if (so != NULL && ipsec6_in_reject_so(m, so)) { 528 ipsec6stat.in_polvio++; 529 return; 530 } 531 #endif /*IPSEC*/ 532 533 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { 534 if (in6p && (in6p->in6p_flags & IN6P_CONTROLOPTS 535 || in6p->in6p_socket->so_options & SO_TIMESTAMP)) { 536 struct ip6_hdr *ip6 = mtod(n, struct ip6_hdr *); 537 ip6_savecontrol(in6p, &opts, ip6, n); 538 } 539 540 m_adj(n, off); 541 if (sbappendaddr(&so->so_rcv, src, n, opts) == 0) { 542 m_freem(n); 543 if (opts) 544 m_freem(opts); 545 udp6stat.udp6s_fullsock++; 546 } else 547 sorwakeup(so); 548 } 549 } 550 #endif 551 552 static int 553 udp4_realinput(src, dst, m, off) 554 struct sockaddr_in *src; 555 struct sockaddr_in *dst; 556 struct mbuf *m; 557 int off; /* offset of udphdr */ 558 { 559 u_int16_t *sport, *dport; 560 int rcvcnt; 561 struct in_addr *src4, *dst4; 562 struct inpcb *inp; 563 564 rcvcnt = 0; 565 off += sizeof(struct udphdr); /* now, offset of payload */ 566 567 if (src->sin_family != AF_INET || dst->sin_family != AF_INET) 568 goto bad; 569 570 src4 = &src->sin_addr; 571 sport = &src->sin_port; 572 dst4 = &dst->sin_addr; 573 dport = &dst->sin_port; 574 575 if (IN_MULTICAST(src4->s_addr) || 576 in_broadcast(*dst4, m->m_pkthdr.rcvif)) { 577 struct inpcb *last; 578 /* 579 * Deliver a multicast or broadcast datagram to *all* sockets 580 * for which the local and remote addresses and ports match 581 * those of the incoming datagram. This allows more than 582 * one process to receive multi/broadcasts on the same port. 583 * (This really ought to be done for unicast datagrams as 584 * well, but that would cause problems with existing 585 * applications that open both address-specific sockets and 586 * a wildcard socket listening to the same port -- they would 587 * end up receiving duplicates of every unicast datagram. 588 * Those applications open the multiple sockets to overcome an 589 * inadequacy of the UDP socket interface, but for backwards 590 * compatibility we avoid the problem here rather than 591 * fixing the interface. Maybe 4.5BSD will remedy this?) 592 */ 593 594 /* 595 * KAME note: usually we drop udpiphdr from mbuf here. 596 * we need udpiphdr for iPsec processing so we do that later. 597 */ 598 /* 599 * Locate pcb(s) for datagram. 600 */ 601 for (inp = udbtable.inpt_queue.cqh_first; 602 inp != (struct inpcb *)&udbtable.inpt_queue; 603 inp = inp->inp_queue.cqe_next) { 604 if (inp->inp_lport != *dport) 605 continue; 606 if (!in_nullhost(inp->inp_laddr)) { 607 if (!in_hosteq(inp->inp_laddr, *dst4)) 608 continue; 609 } 610 if (!in_nullhost(inp->inp_faddr)) { 611 if (!in_hosteq(inp->inp_faddr, *src4) || 612 inp->inp_fport != *sport) 613 continue; 614 } 615 616 last = inp; 617 udp4_sendup(m, off, (struct sockaddr *)src, 618 inp->inp_socket); 619 rcvcnt++; 620 621 /* 622 * Don't look for additional matches if this one does 623 * not have either the SO_REUSEPORT or SO_REUSEADDR 624 * socket options set. This heuristic avoids searching 625 * through all pcbs in the common case of a non-shared 626 * port. It assumes that an application will never 627 * clear these options after setting them. 628 */ 629 if ((inp->inp_socket->so_options & 630 (SO_REUSEPORT|SO_REUSEADDR)) == 0) 631 break; 632 } 633 634 #if 0 635 if (last == NULL) { 636 /* 637 * No matching pcb found; discard datagram. 638 * (No need to send an ICMP Port Unreachable 639 * for a broadcast or multicast datgram.) 640 */ 641 udpstat.udps_noport++; 642 udpstat.udps_noportbcast++; 643 goto bad; 644 } 645 #endif 646 } else { 647 /* 648 * Locate pcb for datagram. 649 */ 650 inp = in_pcblookup_connect(&udbtable, *src4, *sport, *dst4, *dport); 651 if (inp == 0) { 652 ++udpstat.udps_pcbhashmiss; 653 inp = in_pcblookup_bind(&udbtable, *dst4, *dport); 654 if (inp == 0) { 655 #if 0 656 struct mbuf *n; 657 658 udpstat.udps_noport++; 659 if (m->m_flags & (M_BCAST | M_MCAST)) { 660 udpstat.udps_noportbcast++; 661 goto bad; 662 } 663 #if NIPKDB > 0 664 if (checkipkdb(src4, *sport, *dport, m, off, 665 m->m_pkthdr.len - off)) { 666 /* 667 * It was a debugger connect packet, 668 * just drop it now 669 */ 670 goto bad; 671 } 672 #endif 673 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { 674 icmp_error(n, ICMP_UNREACH, 675 ICMP_UNREACH_PORT, 0, 0); 676 } 677 #endif 678 return rcvcnt; 679 } 680 } 681 682 udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket); 683 rcvcnt++; 684 } 685 686 bad: 687 return rcvcnt; 688 } 689 690 #ifdef INET6 691 static int 692 in6_mcmatch(in6p, ia6, ifp) 693 struct in6pcb *in6p; 694 register struct in6_addr *ia6; 695 struct ifnet *ifp; 696 { 697 struct ip6_moptions *im6o = in6p->in6p_moptions; 698 struct in6_multi_mship *imm; 699 700 if (im6o == NULL) 701 return 0; 702 703 for (imm = im6o->im6o_memberships.lh_first; imm != NULL; 704 imm = imm->i6mm_chain.le_next) { 705 if ((ifp == NULL || 706 imm->i6mm_maddr->in6m_ifp == ifp) && 707 IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr, 708 ia6)) 709 return 1; 710 } 711 return 0; 712 } 713 714 static int 715 udp6_realinput(af, src, dst, m, off) 716 int af; /* af on packet */ 717 struct sockaddr_in6 *src; 718 struct sockaddr_in6 *dst; 719 struct mbuf *m; 720 int off; /* offset of udphdr */ 721 { 722 u_int16_t *sport, *dport; 723 int rcvcnt; 724 struct in6_addr *src6, *dst6; 725 struct in_addr *src4; 726 struct in6pcb *in6p; 727 728 rcvcnt = 0; 729 off += sizeof(struct udphdr); /* now, offset of payload */ 730 731 if (af != AF_INET && af != AF_INET6) 732 goto bad; 733 if (src->sin6_family != AF_INET6 || dst->sin6_family != AF_INET6) 734 goto bad; 735 736 src6 = &src->sin6_addr; 737 sport = &src->sin6_port; 738 dst6 = &dst->sin6_addr; 739 dport = &dst->sin6_port; 740 src4 = (struct in_addr *)&src->sin6_addr.s6_addr32[12]; 741 742 if (IN6_IS_ADDR_MULTICAST(dst6) 743 || (af == AF_INET && IN_MULTICAST(src4->s_addr))) { 744 struct in6pcb *last; 745 /* 746 * Deliver a multicast or broadcast datagram to *all* sockets 747 * for which the local and remote addresses and ports match 748 * those of the incoming datagram. This allows more than 749 * one process to receive multi/broadcasts on the same port. 750 * (This really ought to be done for unicast datagrams as 751 * well, but that would cause problems with existing 752 * applications that open both address-specific sockets and 753 * a wildcard socket listening to the same port -- they would 754 * end up receiving duplicates of every unicast datagram. 755 * Those applications open the multiple sockets to overcome an 756 * inadequacy of the UDP socket interface, but for backwards 757 * compatibility we avoid the problem here rather than 758 * fixing the interface. Maybe 4.5BSD will remedy this?) 759 */ 760 761 /* 762 * KAME note: usually we drop udpiphdr from mbuf here. 763 * we need udpiphdr for iPsec processing so we do that later. 764 */ 765 /* 766 * Locate pcb(s) for datagram. 767 */ 768 for (in6p = udb6.in6p_next; in6p != &udb6; 769 in6p = in6p->in6p_next) { 770 if (in6p->in6p_lport != *dport) 771 continue; 772 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { 773 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, dst6) 774 && !in6_mcmatch(in6p, dst6, m->m_pkthdr.rcvif)) 775 continue; 776 } 777 #ifndef INET6_BINDV6ONLY 778 else { 779 if (IN6_IS_ADDR_V4MAPPED(dst6) 780 && (in6p->in6p_flags & IN6P_BINDV6ONLY)) 781 continue; 782 } 783 #endif 784 if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 785 if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, src6) 786 || in6p->in6p_fport != *sport) 787 continue; 788 } 789 #ifndef INET6_BINDV6ONLY 790 else { 791 if (IN6_IS_ADDR_V4MAPPED(src6) 792 && (in6p->in6p_flags & IN6P_BINDV6ONLY)) 793 continue; 794 } 795 #endif 796 797 last = in6p; 798 udp6_sendup(m, off, (struct sockaddr *)src, 799 in6p->in6p_socket); 800 rcvcnt++; 801 802 /* 803 * Don't look for additional matches if this one does 804 * not have either the SO_REUSEPORT or SO_REUSEADDR 805 * socket options set. This heuristic avoids searching 806 * through all pcbs in the common case of a non-shared 807 * port. It assumes that an application will never 808 * clear these options after setting them. 809 */ 810 if ((in6p->in6p_socket->so_options & 811 (SO_REUSEPORT|SO_REUSEADDR)) == 0) 812 break; 813 } 814 815 #if 0 816 if (last == NULL) { 817 /* 818 * No matching pcb found; discard datagram. 819 * (No need to send an ICMP Port Unreachable 820 * for a broadcast or multicast datgram.) 821 */ 822 switch (af) { 823 case AF_INET: 824 udpstat.udps_noport++; 825 udpstat.udps_noportbcast++; 826 break; 827 case AF_INET6: 828 udp6stat.udp6s_noport++; 829 udp6stat.udp6s_noportmcast++; 830 break; 831 } 832 goto bad; 833 } 834 #endif 835 } else { 836 /* 837 * Locate pcb for datagram. 838 */ 839 in6p = in6_pcblookup_connect(&udb6, src6, *sport, 840 dst6, *dport, 0); 841 if (in6p == 0) { 842 ++udpstat.udps_pcbhashmiss; 843 in6p = in6_pcblookup_bind(&udb6, dst6, *dport, 0); 844 if (in6p == 0) { 845 #if 0 846 struct mbuf *n; 847 n = m_copy(m, 0, M_COPYALL); 848 switch (af) { 849 case AF_INET: 850 udpstat.udps_noport++; 851 if (m->m_flags & (M_BCAST | M_MCAST)) { 852 udpstat.udps_noportbcast++; 853 goto bad; 854 } 855 if (n != NULL) 856 icmp_error(n, ICMP_UNREACH, 857 ICMP_UNREACH_PORT, 0, 0); 858 break; 859 case AF_INET6: 860 udp6stat.udp6s_noport++; 861 if (m->m_flags & M_MCAST) { 862 udp6stat.udp6s_noportmcast++; 863 goto bad; 864 } 865 if (n != NULL) 866 icmp6_error(n, ICMP6_DST_UNREACH, 867 ICMP6_DST_UNREACH_NOPORT, 0); 868 break; 869 } 870 #endif 871 872 return rcvcnt; 873 } 874 } 875 876 udp6_sendup(m, off, (struct sockaddr *)src, in6p->in6p_socket); 877 rcvcnt++; 878 } 879 880 bad: 881 return rcvcnt; 882 } 883 #endif 884 885 #else /*UDP6*/ 886 887 void 888 #if __STDC__ 889 udp_input(struct mbuf *m, ...) 890 #else 891 udp_input(m, va_alist) 892 struct mbuf *m; 893 va_dcl 894 #endif 895 { 896 int proto; 897 register struct ip *ip; 898 register struct udphdr *uh; 899 register struct inpcb *inp; 900 struct mbuf *opts = 0; 901 int len; 902 struct ip save_ip; 903 int iphlen; 904 va_list ap; 905 struct sockaddr_in udpsrc; 906 struct sockaddr *sa; 907 908 va_start(ap, m); 909 iphlen = va_arg(ap, int); 910 proto = va_arg(ap, int); 911 va_end(ap); 912 913 udpstat.udps_ipackets++; 914 915 /* 916 * Strip IP options, if any; should skip this, 917 * make available to user, and use on returned packets, 918 * but we don't yet have a way to check the checksum 919 * with options still present. 920 */ 921 if (iphlen > sizeof (struct ip)) { 922 ip_stripoptions(m, (struct mbuf *)0); 923 iphlen = sizeof(struct ip); 924 } 925 926 /* 927 * Get IP and UDP header together in first mbuf. 928 */ 929 ip = mtod(m, struct ip *); 930 if (m->m_len < iphlen + sizeof(struct udphdr)) { 931 if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) { 932 udpstat.udps_hdrops++; 933 return; 934 } 935 ip = mtod(m, struct ip *); 936 } 937 uh = (struct udphdr *)((caddr_t)ip + iphlen); 938 939 /* destination port of 0 is illegal, based on RFC768. */ 940 if (uh->uh_dport == 0) 941 goto bad; 942 943 /* 944 * Make mbuf data length reflect UDP length. 945 * If not enough data to reflect UDP length, drop. 946 */ 947 len = ntohs((u_int16_t)uh->uh_ulen); 948 if (ip->ip_len != iphlen + len) { 949 if (ip->ip_len < iphlen + len) { 950 udpstat.udps_badlen++; 951 goto bad; 952 } 953 m_adj(m, iphlen + len - ip->ip_len); 954 } 955 /* 956 * Save a copy of the IP header in case we want restore it 957 * for sending an ICMP error message in response. 958 */ 959 save_ip = *ip; 960 961 /* 962 * Checksum extended UDP header and data. 963 */ 964 if (uh->uh_sum) { 965 bzero(((struct ipovly *)ip)->ih_x1, 966 sizeof ((struct ipovly *)ip)->ih_x1); 967 ((struct ipovly *)ip)->ih_len = uh->uh_ulen; 968 if (in_cksum(m, len + sizeof (struct ip)) != 0) { 969 udpstat.udps_badsum++; 970 m_freem(m); 971 return; 972 } 973 } 974 975 /* 976 * Construct sockaddr format source address. 977 */ 978 udpsrc.sin_family = AF_INET; 979 udpsrc.sin_len = sizeof(struct sockaddr_in); 980 udpsrc.sin_addr = ip->ip_src; 981 udpsrc.sin_port = uh->uh_sport; 982 bzero((caddr_t)udpsrc.sin_zero, sizeof(udpsrc.sin_zero)); 983 984 if (IN_MULTICAST(ip->ip_dst.s_addr) || 985 in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) { 986 struct inpcb *last; 987 /* 988 * Deliver a multicast or broadcast datagram to *all* sockets 989 * for which the local and remote addresses and ports match 990 * those of the incoming datagram. This allows more than 991 * one process to receive multi/broadcasts on the same port. 992 * (This really ought to be done for unicast datagrams as 993 * well, but that would cause problems with existing 994 * applications that open both address-specific sockets and 995 * a wildcard socket listening to the same port -- they would 996 * end up receiving duplicates of every unicast datagram. 997 * Those applications open the multiple sockets to overcome an 998 * inadequacy of the UDP socket interface, but for backwards 999 * compatibility we avoid the problem here rather than 1000 * fixing the interface. Maybe 4.5BSD will remedy this?) 1001 */ 1002 1003 iphlen += sizeof(struct udphdr); 1004 /* 1005 * KAME note: usually we drop udpiphdr from mbuf here. 1006 * we need udpiphdr for iPsec processing so we do that later. 1007 */ 1008 /* 1009 * Locate pcb(s) for datagram. 1010 * (Algorithm copied from raw_intr().) 1011 */ 1012 last = NULL; 1013 for (inp = udbtable.inpt_queue.cqh_first; 1014 inp != (struct inpcb *)&udbtable.inpt_queue; 1015 inp = inp->inp_queue.cqe_next) { 1016 if (inp->inp_lport != uh->uh_dport) 1017 continue; 1018 if (!in_nullhost(inp->inp_laddr)) { 1019 if (!in_hosteq(inp->inp_laddr, ip->ip_dst)) 1020 continue; 1021 } 1022 if (!in_nullhost(inp->inp_faddr)) { 1023 if (!in_hosteq(inp->inp_faddr, ip->ip_src) || 1024 inp->inp_fport != uh->uh_sport) 1025 continue; 1026 } 1027 1028 if (last != NULL) { 1029 struct mbuf *n; 1030 1031 #ifdef IPSEC 1032 /* check AH/ESP integrity. */ 1033 if (last != NULL && ipsec4_in_reject(m, last)) { 1034 ipsecstat.in_polvio++; 1035 /* do not inject data to pcb */ 1036 } else 1037 #endif /*IPSEC*/ 1038 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { 1039 if (last->inp_flags & INP_CONTROLOPTS 1040 || last->inp_socket->so_options & 1041 SO_TIMESTAMP) { 1042 ip_savecontrol(last, &opts, 1043 ip, n); 1044 } 1045 m_adj(n, iphlen); 1046 sa = (struct sockaddr *)&udpsrc; 1047 if (sbappendaddr( 1048 &last->inp_socket->so_rcv, 1049 sa, n, opts) == 0) { 1050 m_freem(n); 1051 if (opts) 1052 m_freem(opts); 1053 } else 1054 sorwakeup(last->inp_socket); 1055 opts = 0; 1056 } 1057 } 1058 last = inp; 1059 /* 1060 * Don't look for additional matches if this one does 1061 * not have either the SO_REUSEPORT or SO_REUSEADDR 1062 * socket options set. This heuristic avoids searching 1063 * through all pcbs in the common case of a non-shared 1064 * port. It * assumes that an application will never 1065 * clear these options after setting them. 1066 */ 1067 if ((last->inp_socket->so_options & 1068 (SO_REUSEPORT|SO_REUSEADDR)) == 0) 1069 break; 1070 } 1071 1072 if (last == NULL) { 1073 /* 1074 * No matching pcb found; discard datagram. 1075 * (No need to send an ICMP Port Unreachable 1076 * for a broadcast or multicast datgram.) 1077 */ 1078 udpstat.udps_noport++; 1079 udpstat.udps_noportbcast++; 1080 goto bad; 1081 } 1082 #ifdef IPSEC 1083 /* check AH/ESP integrity. */ 1084 if (last != NULL && ipsec4_in_reject(m, last)) { 1085 ipsecstat.in_polvio++; 1086 goto bad; 1087 } 1088 #endif /*IPSEC*/ 1089 if (last->inp_flags & INP_CONTROLOPTS || 1090 last->inp_socket->so_options & SO_TIMESTAMP) 1091 ip_savecontrol(last, &opts, ip, m); 1092 m->m_len -= iphlen; 1093 m->m_pkthdr.len -= iphlen; 1094 m->m_data += iphlen; 1095 sa = (struct sockaddr *)&udpsrc; 1096 if (sbappendaddr(&last->inp_socket->so_rcv, sa, m, opts) == 0) { 1097 udpstat.udps_fullsock++; 1098 goto bad; 1099 } 1100 sorwakeup(last->inp_socket); 1101 return; 1102 } 1103 /* 1104 * Locate pcb for datagram. 1105 */ 1106 inp = in_pcblookup_connect(&udbtable, ip->ip_src, uh->uh_sport, 1107 ip->ip_dst, uh->uh_dport); 1108 if (inp == 0) { 1109 ++udpstat.udps_pcbhashmiss; 1110 inp = in_pcblookup_bind(&udbtable, ip->ip_dst, uh->uh_dport); 1111 if (inp == 0) { 1112 udpstat.udps_noport++; 1113 if (m->m_flags & (M_BCAST | M_MCAST)) { 1114 udpstat.udps_noportbcast++; 1115 goto bad; 1116 } 1117 *ip = save_ip; 1118 #if NIPKDB > 0 1119 if (checkipkdb(&ip->ip_src, 1120 uh->uh_sport, 1121 uh->uh_dport, 1122 m, 1123 iphlen + sizeof(struct udphdr), 1124 len - sizeof(struct udphdr))) 1125 /* It was a debugger connect packet, just drop it now */ 1126 goto bad; 1127 #endif 1128 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0); 1129 return; 1130 } 1131 } 1132 #ifdef IPSEC 1133 if (inp != NULL && ipsec4_in_reject(m, inp)) { 1134 ipsecstat.in_polvio++; 1135 goto bad; 1136 } 1137 #endif /*IPSEC*/ 1138 1139 /* 1140 * Stuff source address and datagram in user buffer. 1141 */ 1142 if (inp->inp_flags & INP_CONTROLOPTS || 1143 inp->inp_socket->so_options & SO_TIMESTAMP) 1144 ip_savecontrol(inp, &opts, ip, m); 1145 iphlen += sizeof(struct udphdr); 1146 m->m_len -= iphlen; 1147 m->m_pkthdr.len -= iphlen; 1148 m->m_data += iphlen; 1149 sa = (struct sockaddr *)&udpsrc; 1150 if (sbappendaddr(&inp->inp_socket->so_rcv, sa, m, opts) == 0) { 1151 udpstat.udps_fullsock++; 1152 goto bad; 1153 } 1154 sorwakeup(inp->inp_socket); 1155 return; 1156 bad: 1157 m_freem(m); 1158 if (opts) 1159 m_freem(opts); 1160 } 1161 #endif /*UDP6*/ 1162 1163 /* 1164 * Notify a udp user of an asynchronous error; 1165 * just wake up so that he can collect error status. 1166 */ 1167 static void 1168 udp_notify(inp, errno) 1169 register struct inpcb *inp; 1170 int errno; 1171 { 1172 1173 inp->inp_socket->so_error = errno; 1174 sorwakeup(inp->inp_socket); 1175 sowwakeup(inp->inp_socket); 1176 } 1177 1178 void * 1179 udp_ctlinput(cmd, sa, v) 1180 int cmd; 1181 struct sockaddr *sa; 1182 void *v; 1183 { 1184 register struct ip *ip = v; 1185 register struct udphdr *uh; 1186 extern int inetctlerrmap[]; 1187 void (*notify) __P((struct inpcb *, int)) = udp_notify; 1188 int errno; 1189 1190 if (sa->sa_family != AF_INET 1191 || sa->sa_len != sizeof(struct sockaddr_in)) 1192 return NULL; 1193 if ((unsigned)cmd >= PRC_NCMDS) 1194 return NULL; 1195 errno = inetctlerrmap[cmd]; 1196 if (PRC_IS_REDIRECT(cmd)) 1197 notify = in_rtchange, ip = 0; 1198 else if (cmd == PRC_HOSTDEAD) 1199 ip = 0; 1200 else if (errno == 0) 1201 return NULL; 1202 if (ip) { 1203 uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2)); 1204 in_pcbnotify(&udbtable, satosin(sa)->sin_addr, uh->uh_dport, 1205 ip->ip_src, uh->uh_sport, errno, notify); 1206 1207 /* XXX mapped address case */ 1208 } else 1209 in_pcbnotifyall(&udbtable, satosin(sa)->sin_addr, errno, 1210 notify); 1211 return NULL; 1212 } 1213 1214 int 1215 #if __STDC__ 1216 udp_output(struct mbuf *m, ...) 1217 #else 1218 udp_output(m, va_alist) 1219 struct mbuf *m; 1220 va_dcl 1221 #endif 1222 { 1223 register struct inpcb *inp; 1224 register struct udpiphdr *ui; 1225 register int len = m->m_pkthdr.len; 1226 int error = 0; 1227 va_list ap; 1228 1229 va_start(ap, m); 1230 inp = va_arg(ap, struct inpcb *); 1231 va_end(ap); 1232 1233 /* 1234 * Calculate data length and get a mbuf 1235 * for UDP and IP headers. 1236 */ 1237 M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT); 1238 if (m == 0) { 1239 error = ENOBUFS; 1240 goto release; 1241 } 1242 1243 /* 1244 * Compute the packet length of the IP header, and 1245 * punt if the length looks bogus. 1246 */ 1247 if ((len + sizeof(struct udpiphdr)) > IP_MAXPACKET) { 1248 error = EMSGSIZE; 1249 goto release; 1250 } 1251 1252 /* 1253 * Fill in mbuf with extended UDP header 1254 * and addresses and length put into network format. 1255 */ 1256 ui = mtod(m, struct udpiphdr *); 1257 bzero(ui->ui_x1, sizeof ui->ui_x1); 1258 ui->ui_pr = IPPROTO_UDP; 1259 ui->ui_len = htons((u_int16_t)len + sizeof (struct udphdr)); 1260 ui->ui_src = inp->inp_laddr; 1261 ui->ui_dst = inp->inp_faddr; 1262 ui->ui_sport = inp->inp_lport; 1263 ui->ui_dport = inp->inp_fport; 1264 ui->ui_ulen = ui->ui_len; 1265 1266 /* 1267 * Stuff checksum and output datagram. 1268 */ 1269 ui->ui_sum = 0; 1270 if (udpcksum) { 1271 if ((ui->ui_sum = in_cksum(m, sizeof (struct udpiphdr) + len)) == 0) 1272 ui->ui_sum = 0xffff; 1273 } 1274 ((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len; 1275 ((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */ 1276 ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */ 1277 udpstat.udps_opackets++; 1278 1279 #ifdef IPSEC 1280 m->m_pkthdr.rcvif = (struct ifnet *)inp->inp_socket; 1281 #endif /*IPSEC*/ 1282 1283 return (ip_output(m, inp->inp_options, &inp->inp_route, 1284 inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST), 1285 inp->inp_moptions)); 1286 1287 release: 1288 m_freem(m); 1289 return (error); 1290 } 1291 1292 int udp_sendspace = 9216; /* really max datagram size */ 1293 int udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in)); 1294 /* 40 1K datagrams */ 1295 1296 /*ARGSUSED*/ 1297 int 1298 udp_usrreq(so, req, m, nam, control, p) 1299 struct socket *so; 1300 int req; 1301 struct mbuf *m, *nam, *control; 1302 struct proc *p; 1303 { 1304 register struct inpcb *inp; 1305 int s; 1306 register int error = 0; 1307 1308 if (req == PRU_CONTROL) 1309 return (in_control(so, (long)m, (caddr_t)nam, 1310 (struct ifnet *)control, p)); 1311 1312 if (req == PRU_PURGEADDR) { 1313 in_purgeaddr((struct ifaddr *)nam, (struct ifnet *)control); 1314 return (0); 1315 } 1316 1317 s = splsoftnet(); 1318 inp = sotoinpcb(so); 1319 #ifdef DIAGNOSTIC 1320 if (req != PRU_SEND && req != PRU_SENDOOB && control) 1321 panic("udp_usrreq: unexpected control mbuf"); 1322 #endif 1323 if (inp == 0 && req != PRU_ATTACH) { 1324 error = EINVAL; 1325 goto release; 1326 } 1327 1328 /* 1329 * Note: need to block udp_input while changing 1330 * the udp pcb queue and/or pcb addresses. 1331 */ 1332 switch (req) { 1333 1334 case PRU_ATTACH: 1335 if (inp != 0) { 1336 error = EISCONN; 1337 break; 1338 } 1339 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 1340 error = soreserve(so, udp_sendspace, udp_recvspace); 1341 if (error) 1342 break; 1343 } 1344 error = in_pcballoc(so, &udbtable); 1345 if (error) 1346 break; 1347 inp = sotoinpcb(so); 1348 inp->inp_ip.ip_ttl = ip_defttl; 1349 #ifdef IPSEC 1350 error = ipsec_init_policy(so, &inp->inp_sp); 1351 if (error != 0) { 1352 in_pcbdetach(inp); 1353 break; 1354 } 1355 #endif /*IPSEC*/ 1356 break; 1357 1358 case PRU_DETACH: 1359 in_pcbdetach(inp); 1360 break; 1361 1362 case PRU_BIND: 1363 error = in_pcbbind(inp, nam, p); 1364 break; 1365 1366 case PRU_LISTEN: 1367 error = EOPNOTSUPP; 1368 break; 1369 1370 case PRU_CONNECT: 1371 error = in_pcbconnect(inp, nam); 1372 if (error) 1373 break; 1374 soisconnected(so); 1375 break; 1376 1377 case PRU_CONNECT2: 1378 error = EOPNOTSUPP; 1379 break; 1380 1381 case PRU_DISCONNECT: 1382 /*soisdisconnected(so);*/ 1383 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 1384 in_pcbdisconnect(inp); 1385 inp->inp_laddr = zeroin_addr; /* XXX */ 1386 in_pcbstate(inp, INP_BOUND); /* XXX */ 1387 break; 1388 1389 case PRU_SHUTDOWN: 1390 socantsendmore(so); 1391 break; 1392 1393 case PRU_RCVD: 1394 error = EOPNOTSUPP; 1395 break; 1396 1397 case PRU_SEND: 1398 if (control && control->m_len) { 1399 m_freem(control); 1400 m_freem(m); 1401 error = EINVAL; 1402 break; 1403 } 1404 { 1405 struct in_addr laddr; /* XXX */ 1406 1407 if (nam) { 1408 laddr = inp->inp_laddr; /* XXX */ 1409 if ((so->so_state & SS_ISCONNECTED) != 0) { 1410 error = EISCONN; 1411 goto die; 1412 } 1413 error = in_pcbconnect(inp, nam); 1414 if (error) { 1415 die: 1416 m_freem(m); 1417 break; 1418 } 1419 } else { 1420 if ((so->so_state & SS_ISCONNECTED) == 0) { 1421 error = ENOTCONN; 1422 goto die; 1423 } 1424 } 1425 error = udp_output(m, inp); 1426 if (nam) { 1427 in_pcbdisconnect(inp); 1428 inp->inp_laddr = laddr; /* XXX */ 1429 in_pcbstate(inp, INP_BOUND); /* XXX */ 1430 } 1431 } 1432 break; 1433 1434 case PRU_SENSE: 1435 /* 1436 * stat: don't bother with a blocksize. 1437 */ 1438 splx(s); 1439 return (0); 1440 1441 case PRU_RCVOOB: 1442 error = EOPNOTSUPP; 1443 break; 1444 1445 case PRU_SENDOOB: 1446 m_freem(control); 1447 m_freem(m); 1448 error = EOPNOTSUPP; 1449 break; 1450 1451 case PRU_SOCKADDR: 1452 in_setsockaddr(inp, nam); 1453 break; 1454 1455 case PRU_PEERADDR: 1456 in_setpeeraddr(inp, nam); 1457 break; 1458 1459 default: 1460 panic("udp_usrreq"); 1461 } 1462 1463 release: 1464 splx(s); 1465 return (error); 1466 } 1467 1468 /* 1469 * Sysctl for udp variables. 1470 */ 1471 int 1472 udp_sysctl(name, namelen, oldp, oldlenp, newp, newlen) 1473 int *name; 1474 u_int namelen; 1475 void *oldp; 1476 size_t *oldlenp; 1477 void *newp; 1478 size_t newlen; 1479 { 1480 /* All sysctl names at this level are terminal. */ 1481 if (namelen != 1) 1482 return (ENOTDIR); 1483 1484 switch (name[0]) { 1485 case UDPCTL_CHECKSUM: 1486 return (sysctl_int(oldp, oldlenp, newp, newlen, &udpcksum)); 1487 case UDPCTL_SENDSPACE: 1488 return (sysctl_int(oldp, oldlenp, newp, newlen, 1489 &udp_sendspace)); 1490 case UDPCTL_RECVSPACE: 1491 return (sysctl_int(oldp, oldlenp, newp, newlen, 1492 &udp_recvspace)); 1493 default: 1494 return (ENOPROTOOPT); 1495 } 1496 /* NOTREACHED */ 1497 } 1498
Indexes created Sun Sep 21 16:09:51 GMT 2025