1 /* $NetBSD: udp_usrreq.c,v 1.246 2018/03/19 16:26:25 roy 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. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95 61 */ 62 63 /* 64 * UDP protocol implementation. 65 * Per RFC 768, August, 1980. 66 */ 67 68 #include <sys/cdefs.h> 69 __KERNEL_RCSID(0, "$NetBSD: udp_usrreq.c,v 1.246 2018/03/19 16:26:25 roy Exp $"); 70 71 #ifdef _KERNEL_OPT 72 #include "opt_inet.h" 73 #include "opt_ipsec.h" 74 #include "opt_inet_csum.h" 75 #include "opt_ipkdb.h" 76 #include "opt_mbuftrace.h" 77 #include "opt_net_mpsafe.h" 78 #endif 79 80 #include <sys/param.h> 81 #include <sys/mbuf.h> 82 #include <sys/once.h> 83 #include <sys/protosw.h> 84 #include <sys/socket.h> 85 #include <sys/socketvar.h> 86 #include <sys/systm.h> 87 #include <sys/proc.h> 88 #include <sys/domain.h> 89 #include <sys/sysctl.h> 90 91 #include <net/if.h> 92 93 #include <netinet/in.h> 94 #include <netinet/in_systm.h> 95 #include <netinet/in_var.h> 96 #include <netinet/ip.h> 97 #include <netinet/in_pcb.h> 98 #include <netinet/ip_var.h> 99 #include <netinet/ip_icmp.h> 100 #include <netinet/udp.h> 101 #include <netinet/udp_var.h> 102 #include <netinet/udp_private.h> 103 104 #ifdef INET6 105 #include <netinet/ip6.h> 106 #include <netinet/icmp6.h> 107 #include <netinet6/ip6_var.h> 108 #include <netinet6/ip6_private.h> 109 #include <netinet6/in6_pcb.h> 110 #include <netinet6/udp6_var.h> 111 #include <netinet6/udp6_private.h> 112 #endif 113 114 #ifndef INET6 115 /* always need ip6.h for IP6_EXTHDR_GET */ 116 #include <netinet/ip6.h> 117 #endif 118 119 #ifdef IPSEC 120 #include <netipsec/ipsec.h> 121 #include <netipsec/ipsec_var.h> 122 #include <netipsec/esp.h> 123 #ifdef INET6 124 #include <netipsec/ipsec6.h> 125 #endif 126 #endif 127 128 #ifdef IPKDB 129 #include <ipkdb/ipkdb.h> 130 #endif 131 132 int udpcksum = 1; 133 int udp_do_loopback_cksum = 0; 134 135 struct inpcbtable udbtable; 136 137 percpu_t *udpstat_percpu; 138 139 #ifdef INET 140 #ifdef IPSEC 141 static int udp4_espinudp(struct mbuf **, int, struct sockaddr *, 142 struct socket *); 143 #endif 144 static void udp4_sendup(struct mbuf *, int, struct sockaddr *, 145 struct socket *); 146 static int udp4_realinput(struct sockaddr_in *, struct sockaddr_in *, 147 struct mbuf **, int); 148 static int udp4_input_checksum(struct mbuf *, const struct udphdr *, int, int); 149 #endif 150 #ifdef INET 151 static void udp_notify (struct inpcb *, int); 152 #endif 153 154 #ifndef UDBHASHSIZE 155 #define UDBHASHSIZE 128 156 #endif 157 int udbhashsize = UDBHASHSIZE; 158 159 /* 160 * For send - really max datagram size; for receive - 40 1K datagrams. 161 */ 162 static int udp_sendspace = 9216; 163 static int udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in)); 164 165 #ifdef MBUFTRACE 166 struct mowner udp_mowner = MOWNER_INIT("udp", ""); 167 struct mowner udp_rx_mowner = MOWNER_INIT("udp", "rx"); 168 struct mowner udp_tx_mowner = MOWNER_INIT("udp", "tx"); 169 #endif 170 171 #ifdef UDP_CSUM_COUNTERS 172 #include <sys/device.h> 173 174 #if defined(INET) 175 struct evcnt udp_hwcsum_bad = EVCNT_INITIALIZER(EVCNT_TYPE_MISC, 176 NULL, "udp", "hwcsum bad"); 177 struct evcnt udp_hwcsum_ok = EVCNT_INITIALIZER(EVCNT_TYPE_MISC, 178 NULL, "udp", "hwcsum ok"); 179 struct evcnt udp_hwcsum_data = EVCNT_INITIALIZER(EVCNT_TYPE_MISC, 180 NULL, "udp", "hwcsum data"); 181 struct evcnt udp_swcsum = EVCNT_INITIALIZER(EVCNT_TYPE_MISC, 182 NULL, "udp", "swcsum"); 183 184 EVCNT_ATTACH_STATIC(udp_hwcsum_bad); 185 EVCNT_ATTACH_STATIC(udp_hwcsum_ok); 186 EVCNT_ATTACH_STATIC(udp_hwcsum_data); 187 EVCNT_ATTACH_STATIC(udp_swcsum); 188 #endif /* defined(INET) */ 189 190 #define UDP_CSUM_COUNTER_INCR(ev) (ev)->ev_count++ 191 #else 192 #define UDP_CSUM_COUNTER_INCR(ev) /* nothing */ 193 #endif /* UDP_CSUM_COUNTERS */ 194 195 static void sysctl_net_inet_udp_setup(struct sysctllog **); 196 197 static int 198 do_udpinit(void) 199 { 200 201 in_pcbinit(&udbtable, udbhashsize, udbhashsize); 202 udpstat_percpu = percpu_alloc(sizeof(uint64_t) * UDP_NSTATS); 203 204 MOWNER_ATTACH(&udp_tx_mowner); 205 MOWNER_ATTACH(&udp_rx_mowner); 206 MOWNER_ATTACH(&udp_mowner); 207 208 return 0; 209 } 210 211 void 212 udp_init_common(void) 213 { 214 static ONCE_DECL(doudpinit); 215 216 RUN_ONCE(&doudpinit, do_udpinit); 217 } 218 219 void 220 udp_init(void) 221 { 222 223 sysctl_net_inet_udp_setup(NULL); 224 225 udp_init_common(); 226 } 227 228 /* 229 * Checksum extended UDP header and data. 230 */ 231 int 232 udp_input_checksum(int af, struct mbuf *m, const struct udphdr *uh, 233 int iphlen, int len) 234 { 235 236 switch (af) { 237 #ifdef INET 238 case AF_INET: 239 return udp4_input_checksum(m, uh, iphlen, len); 240 #endif 241 #ifdef INET6 242 case AF_INET6: 243 return udp6_input_checksum(m, uh, iphlen, len); 244 #endif 245 } 246 #ifdef DIAGNOSTIC 247 panic("udp_input_checksum: unknown af %d", af); 248 #endif 249 /* NOTREACHED */ 250 return -1; 251 } 252 253 #ifdef INET 254 255 /* 256 * Checksum extended UDP header and data. 257 */ 258 static int 259 udp4_input_checksum(struct mbuf *m, const struct udphdr *uh, 260 int iphlen, int len) 261 { 262 263 /* 264 * XXX it's better to record and check if this mbuf is 265 * already checked. 266 */ 267 268 if (uh->uh_sum == 0) 269 return 0; 270 271 switch (m->m_pkthdr.csum_flags & 272 ((m_get_rcvif_NOMPSAFE(m)->if_csum_flags_rx & M_CSUM_UDPv4) | 273 M_CSUM_TCP_UDP_BAD | M_CSUM_DATA)) { 274 case M_CSUM_UDPv4|M_CSUM_TCP_UDP_BAD: 275 UDP_CSUM_COUNTER_INCR(&udp_hwcsum_bad); 276 goto badcsum; 277 278 case M_CSUM_UDPv4|M_CSUM_DATA: { 279 u_int32_t hw_csum = m->m_pkthdr.csum_data; 280 281 UDP_CSUM_COUNTER_INCR(&udp_hwcsum_data); 282 if (m->m_pkthdr.csum_flags & M_CSUM_NO_PSEUDOHDR) { 283 const struct ip *ip = 284 mtod(m, const struct ip *); 285 286 hw_csum = in_cksum_phdr(ip->ip_src.s_addr, 287 ip->ip_dst.s_addr, 288 htons(hw_csum + len + IPPROTO_UDP)); 289 } 290 if ((hw_csum ^ 0xffff) != 0) 291 goto badcsum; 292 break; 293 } 294 295 case M_CSUM_UDPv4: 296 /* Checksum was okay. */ 297 UDP_CSUM_COUNTER_INCR(&udp_hwcsum_ok); 298 break; 299 300 default: 301 /* 302 * Need to compute it ourselves. Maybe skip checksum 303 * on loopback interfaces. 304 */ 305 if (__predict_true(!(m_get_rcvif_NOMPSAFE(m)->if_flags & 306 IFF_LOOPBACK) || 307 udp_do_loopback_cksum)) { 308 UDP_CSUM_COUNTER_INCR(&udp_swcsum); 309 if (in4_cksum(m, IPPROTO_UDP, iphlen, len) != 0) 310 goto badcsum; 311 } 312 break; 313 } 314 315 return 0; 316 317 badcsum: 318 UDP_STATINC(UDP_STAT_BADSUM); 319 return -1; 320 } 321 322 void 323 udp_input(struct mbuf *m, ...) 324 { 325 va_list ap; 326 struct sockaddr_in src, dst; 327 struct ip *ip; 328 struct udphdr *uh; 329 int iphlen; 330 int len; 331 int n; 332 u_int16_t ip_len; 333 334 va_start(ap, m); 335 iphlen = va_arg(ap, int); 336 (void)va_arg(ap, int); /* ignore value, advance ap */ 337 va_end(ap); 338 339 MCLAIM(m, &udp_rx_mowner); 340 UDP_STATINC(UDP_STAT_IPACKETS); 341 342 /* 343 * Get IP and UDP header together in first mbuf. 344 */ 345 ip = mtod(m, struct ip *); 346 IP6_EXTHDR_GET(uh, struct udphdr *, m, iphlen, sizeof(struct udphdr)); 347 if (uh == NULL) { 348 UDP_STATINC(UDP_STAT_HDROPS); 349 return; 350 } 351 352 /* 353 * Enforce alignment requirements that are violated in 354 * some cases, see kern/50766 for details. 355 */ 356 if (UDP_HDR_ALIGNED_P(uh) == 0) { 357 m = m_copyup(m, iphlen + sizeof(struct udphdr), 0); 358 if (m == NULL) { 359 UDP_STATINC(UDP_STAT_HDROPS); 360 return; 361 } 362 ip = mtod(m, struct ip *); 363 uh = (struct udphdr *)(mtod(m, char *) + iphlen); 364 } 365 KASSERT(UDP_HDR_ALIGNED_P(uh)); 366 367 /* destination port of 0 is illegal, based on RFC768. */ 368 if (uh->uh_dport == 0) 369 goto bad; 370 371 /* 372 * Make mbuf data length reflect UDP length. 373 * If not enough data to reflect UDP length, drop. 374 */ 375 ip_len = ntohs(ip->ip_len); 376 len = ntohs((u_int16_t)uh->uh_ulen); 377 if (ip_len != iphlen + len) { 378 if (ip_len < iphlen + len || len < sizeof(struct udphdr)) { 379 UDP_STATINC(UDP_STAT_BADLEN); 380 goto bad; 381 } 382 m_adj(m, iphlen + len - ip_len); 383 } 384 385 /* 386 * Checksum extended UDP header and data. 387 */ 388 if (udp4_input_checksum(m, uh, iphlen, len)) 389 goto badcsum; 390 391 /* construct source and dst sockaddrs. */ 392 sockaddr_in_init(&src, &ip->ip_src, uh->uh_sport); 393 sockaddr_in_init(&dst, &ip->ip_dst, uh->uh_dport); 394 395 if ((n = udp4_realinput(&src, &dst, &m, iphlen)) == -1) { 396 UDP_STATINC(UDP_STAT_HDROPS); 397 return; 398 } 399 if (m == NULL) { 400 /* 401 * packet has been processed by ESP stuff - 402 * e.g. dropped NAT-T-keep-alive-packet ... 403 */ 404 return; 405 } 406 407 ip = mtod(m, struct ip *); 408 IP6_EXTHDR_GET(uh, struct udphdr *, m, iphlen, sizeof(struct udphdr)); 409 if (uh == NULL) { 410 UDP_STATINC(UDP_STAT_HDROPS); 411 return; 412 } 413 /* XXX Re-enforce alignment? */ 414 415 #ifdef INET6 416 if (IN_MULTICAST(ip->ip_dst.s_addr) || n == 0) { 417 struct sockaddr_in6 src6, dst6; 418 419 memset(&src6, 0, sizeof(src6)); 420 src6.sin6_family = AF_INET6; 421 src6.sin6_len = sizeof(struct sockaddr_in6); 422 in6_in_2_v4mapin6(&ip->ip_src, &src6.sin6_addr); 423 src6.sin6_port = uh->uh_sport; 424 memset(&dst6, 0, sizeof(dst6)); 425 dst6.sin6_family = AF_INET6; 426 dst6.sin6_len = sizeof(struct sockaddr_in6); 427 in6_in_2_v4mapin6(&ip->ip_dst, &dst6.sin6_addr); 428 dst6.sin6_port = uh->uh_dport; 429 430 n += udp6_realinput(AF_INET, &src6, &dst6, m, iphlen); 431 } 432 #endif 433 434 if (n == 0) { 435 if (m->m_flags & (M_BCAST | M_MCAST)) { 436 UDP_STATINC(UDP_STAT_NOPORTBCAST); 437 goto bad; 438 } 439 UDP_STATINC(UDP_STAT_NOPORT); 440 #ifdef IPKDB 441 if (checkipkdb(&ip->ip_src, uh->uh_sport, uh->uh_dport, 442 m, iphlen + sizeof(struct udphdr), 443 m->m_pkthdr.len - iphlen - sizeof(struct udphdr))) { 444 /* 445 * It was a debugger connect packet, 446 * just drop it now 447 */ 448 goto bad; 449 } 450 #endif 451 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0); 452 m = NULL; 453 } 454 455 bad: 456 if (m) 457 m_freem(m); 458 return; 459 460 badcsum: 461 m_freem(m); 462 } 463 #endif 464 465 #ifdef INET 466 static void 467 udp4_sendup(struct mbuf *m, int off /* offset of data portion */, 468 struct sockaddr *src, struct socket *so) 469 { 470 struct mbuf *opts = NULL; 471 struct mbuf *n; 472 struct inpcb *inp; 473 474 KASSERT(so != NULL); 475 KASSERT(so->so_proto->pr_domain->dom_family == AF_INET); 476 inp = sotoinpcb(so); 477 KASSERT(inp != NULL); 478 479 #if defined(IPSEC) 480 /* check AH/ESP integrity. */ 481 if (ipsec_used && ipsec_in_reject(m, inp)) { 482 if ((n = m_copypacket(m, M_DONTWAIT)) != NULL) 483 icmp_error(n, ICMP_UNREACH, ICMP_UNREACH_ADMIN_PROHIBIT, 484 0, 0); 485 return; 486 } 487 #endif 488 489 if ((n = m_copypacket(m, M_DONTWAIT)) != NULL) { 490 if (inp->inp_flags & INP_CONTROLOPTS || 491 SOOPT_TIMESTAMP(so->so_options)) { 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, opts) == 0) { 498 m_freem(n); 499 if (opts) 500 m_freem(opts); 501 UDP_STATINC(UDP_STAT_FULLSOCK); 502 soroverflow(so); 503 } else 504 sorwakeup(so); 505 } 506 } 507 #endif 508 509 #ifdef INET 510 static int 511 udp4_realinput(struct sockaddr_in *src, struct sockaddr_in *dst, 512 struct mbuf **mp, int off /* offset of udphdr */) 513 { 514 u_int16_t *sport, *dport; 515 int rcvcnt; 516 struct in_addr *src4, *dst4; 517 struct inpcb_hdr *inph; 518 struct inpcb *inp; 519 struct mbuf *m = *mp; 520 521 rcvcnt = 0; 522 off += sizeof(struct udphdr); /* now, offset of payload */ 523 524 if (src->sin_family != AF_INET || dst->sin_family != AF_INET) 525 goto bad; 526 527 src4 = &src->sin_addr; 528 sport = &src->sin_port; 529 dst4 = &dst->sin_addr; 530 dport = &dst->sin_port; 531 532 if (IN_MULTICAST(dst4->s_addr) || 533 in_broadcast(*dst4, m_get_rcvif_NOMPSAFE(m))) { 534 /* 535 * Deliver a multicast or broadcast datagram to *all* sockets 536 * for which the local and remote addresses and ports match 537 * those of the incoming datagram. This allows more than 538 * one process to receive multi/broadcasts on the same port. 539 * (This really ought to be done for unicast datagrams as 540 * well, but that would cause problems with existing 541 * applications that open both address-specific sockets and 542 * a wildcard socket listening to the same port -- they would 543 * end up receiving duplicates of every unicast datagram. 544 * Those applications open the multiple sockets to overcome an 545 * inadequacy of the UDP socket interface, but for backwards 546 * compatibility we avoid the problem here rather than 547 * fixing the interface. Maybe 4.5BSD will remedy this?) 548 */ 549 550 /* 551 * KAME note: traditionally we dropped udpiphdr from mbuf here. 552 * we need udpiphdr for IPsec processing so we do that later. 553 */ 554 /* 555 * Locate pcb(s) for datagram. 556 */ 557 TAILQ_FOREACH(inph, &udbtable.inpt_queue, inph_queue) { 558 inp = (struct inpcb *)inph; 559 if (inp->inp_af != AF_INET) 560 continue; 561 562 if (inp->inp_lport != *dport) 563 continue; 564 if (!in_nullhost(inp->inp_laddr)) { 565 if (!in_hosteq(inp->inp_laddr, *dst4)) 566 continue; 567 } 568 if (!in_nullhost(inp->inp_faddr)) { 569 if (!in_hosteq(inp->inp_faddr, *src4) || 570 inp->inp_fport != *sport) 571 continue; 572 } 573 574 udp4_sendup(m, off, (struct sockaddr *)src, 575 inp->inp_socket); 576 rcvcnt++; 577 578 /* 579 * Don't look for additional matches if this one does 580 * not have either the SO_REUSEPORT or SO_REUSEADDR 581 * socket options set. This heuristic avoids searching 582 * through all pcbs in the common case of a non-shared 583 * port. It assumes that an application will never 584 * clear these options after setting them. 585 */ 586 if ((inp->inp_socket->so_options & 587 (SO_REUSEPORT|SO_REUSEADDR)) == 0) 588 break; 589 } 590 } else { 591 /* 592 * Locate pcb for datagram. 593 */ 594 inp = in_pcblookup_connect(&udbtable, *src4, *sport, *dst4, 595 *dport, 0); 596 if (inp == 0) { 597 UDP_STATINC(UDP_STAT_PCBHASHMISS); 598 inp = in_pcblookup_bind(&udbtable, *dst4, *dport); 599 if (inp == 0) 600 return rcvcnt; 601 } 602 603 #ifdef IPSEC 604 /* Handle ESP over UDP */ 605 if (inp->inp_flags & INP_ESPINUDP_ALL) { 606 struct sockaddr *sa = (struct sockaddr *)src; 607 608 switch (udp4_espinudp(mp, off, sa, inp->inp_socket)) { 609 case -1: /* Error, m was freed */ 610 rcvcnt = -1; 611 goto bad; 612 613 case 1: /* ESP over UDP */ 614 rcvcnt++; 615 goto bad; 616 617 case 0: /* plain UDP */ 618 default: /* Unexpected */ 619 /* 620 * Normal UDP processing will take place, 621 * m may have changed. 622 */ 623 m = *mp; 624 break; 625 } 626 } 627 #endif 628 629 /* 630 * Check the minimum TTL for socket. 631 */ 632 if (mtod(m, struct ip *)->ip_ttl < inp->inp_ip_minttl) 633 goto bad; 634 635 udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket); 636 rcvcnt++; 637 } 638 639 bad: 640 return rcvcnt; 641 } 642 #endif 643 644 #ifdef INET 645 /* 646 * Notify a udp user of an asynchronous error; 647 * just wake up so that he can collect error status. 648 */ 649 static void 650 udp_notify(struct inpcb *inp, int errno) 651 { 652 inp->inp_socket->so_error = errno; 653 sorwakeup(inp->inp_socket); 654 sowwakeup(inp->inp_socket); 655 } 656 657 void * 658 udp_ctlinput(int cmd, const struct sockaddr *sa, void *v) 659 { 660 struct ip *ip = v; 661 struct udphdr *uh; 662 void (*notify)(struct inpcb *, int) = udp_notify; 663 int errno; 664 665 if (sa->sa_family != AF_INET || 666 sa->sa_len != sizeof(struct sockaddr_in)) 667 return NULL; 668 if ((unsigned)cmd >= PRC_NCMDS) 669 return NULL; 670 671 errno = inetctlerrmap[cmd]; 672 if (PRC_IS_REDIRECT(cmd)) { 673 notify = in_rtchange; 674 ip = NULL; 675 } else if (cmd == PRC_HOSTDEAD) { 676 ip = NULL; 677 } else if (errno == 0) { 678 return NULL; 679 } 680 681 if (ip) { 682 uh = (struct udphdr *)((char *)ip + (ip->ip_hl << 2)); 683 in_pcbnotify(&udbtable, satocsin(sa)->sin_addr, uh->uh_dport, 684 ip->ip_src, uh->uh_sport, errno, notify); 685 /* XXX mapped address case */ 686 } else { 687 in_pcbnotifyall(&udbtable, satocsin(sa)->sin_addr, errno, 688 notify); 689 } 690 691 return NULL; 692 } 693 694 int 695 udp_ctloutput(int op, struct socket *so, struct sockopt *sopt) 696 { 697 int s; 698 int error = 0; 699 struct inpcb *inp; 700 int family; 701 int optval; 702 703 family = so->so_proto->pr_domain->dom_family; 704 705 s = splsoftnet(); 706 switch (family) { 707 #ifdef INET 708 case PF_INET: 709 if (sopt->sopt_level != IPPROTO_UDP) { 710 error = ip_ctloutput(op, so, sopt); 711 goto end; 712 } 713 break; 714 #endif 715 #ifdef INET6 716 case PF_INET6: 717 if (sopt->sopt_level != IPPROTO_UDP) { 718 error = ip6_ctloutput(op, so, sopt); 719 goto end; 720 } 721 break; 722 #endif 723 default: 724 error = EAFNOSUPPORT; 725 goto end; 726 } 727 728 729 switch (op) { 730 case PRCO_SETOPT: 731 inp = sotoinpcb(so); 732 733 switch (sopt->sopt_name) { 734 case UDP_ENCAP: 735 error = sockopt_getint(sopt, &optval); 736 if (error) 737 break; 738 739 switch(optval) { 740 case 0: 741 inp->inp_flags &= ~INP_ESPINUDP_ALL; 742 break; 743 744 case UDP_ENCAP_ESPINUDP: 745 inp->inp_flags &= ~INP_ESPINUDP_ALL; 746 inp->inp_flags |= INP_ESPINUDP; 747 break; 748 749 case UDP_ENCAP_ESPINUDP_NON_IKE: 750 inp->inp_flags &= ~INP_ESPINUDP_ALL; 751 inp->inp_flags |= INP_ESPINUDP_NON_IKE; 752 break; 753 default: 754 error = EINVAL; 755 break; 756 } 757 break; 758 759 default: 760 error = ENOPROTOOPT; 761 break; 762 } 763 break; 764 765 default: 766 error = EINVAL; 767 break; 768 } 769 770 end: 771 splx(s); 772 return error; 773 } 774 775 int 776 udp_output(struct mbuf *m, struct inpcb *inp, struct mbuf *control, 777 struct lwp *l) 778 { 779 struct udpiphdr *ui; 780 struct route *ro; 781 struct ip_pktopts pktopts; 782 kauth_cred_t cred; 783 int len = m->m_pkthdr.len; 784 int error, flags = 0; 785 786 MCLAIM(m, &udp_tx_mowner); 787 788 /* 789 * Calculate data length and get a mbuf 790 * for UDP and IP headers. 791 */ 792 M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT); 793 if (m == NULL) { 794 error = ENOBUFS; 795 goto release; 796 } 797 798 /* 799 * Compute the packet length of the IP header, and 800 * punt if the length looks bogus. 801 */ 802 if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) { 803 error = EMSGSIZE; 804 goto release; 805 } 806 807 if (l == NULL) 808 cred = NULL; 809 else 810 cred = l->l_cred; 811 812 /* Setup IP outgoing packet options */ 813 memset(&pktopts, 0, sizeof(pktopts)); 814 error = ip_setpktopts(control, &pktopts, &flags, inp, cred); 815 if (error != 0) 816 goto release; 817 818 if (control != NULL) { 819 m_freem(control); 820 control = NULL; 821 } 822 823 /* 824 * Fill in mbuf with extended UDP header 825 * and addresses and length put into network format. 826 */ 827 ui = mtod(m, struct udpiphdr *); 828 ui->ui_pr = IPPROTO_UDP; 829 ui->ui_src = pktopts.ippo_laddr.sin_addr; 830 ui->ui_dst = inp->inp_faddr; 831 ui->ui_sport = inp->inp_lport; 832 ui->ui_dport = inp->inp_fport; 833 ui->ui_ulen = htons((u_int16_t)len + sizeof(struct udphdr)); 834 835 ro = &inp->inp_route; 836 837 /* 838 * Set up checksum and output datagram. 839 */ 840 if (udpcksum) { 841 /* 842 * XXX Cache pseudo-header checksum part for 843 * XXX "connected" UDP sockets. 844 */ 845 ui->ui_sum = in_cksum_phdr(ui->ui_src.s_addr, 846 ui->ui_dst.s_addr, htons((u_int16_t)len + 847 sizeof(struct udphdr) + IPPROTO_UDP)); 848 m->m_pkthdr.csum_flags = M_CSUM_UDPv4; 849 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum); 850 } else 851 ui->ui_sum = 0; 852 853 ((struct ip *)ui)->ip_len = htons(sizeof(struct udpiphdr) + len); 854 ((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */ 855 ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */ 856 UDP_STATINC(UDP_STAT_OPACKETS); 857 858 flags |= inp->inp_socket->so_options & (SO_DONTROUTE|SO_BROADCAST); 859 return ip_output(m, inp->inp_options, ro, flags, pktopts.ippo_imo, inp); 860 861 release: 862 if (control != NULL) 863 m_freem(control); 864 m_freem(m); 865 return error; 866 } 867 868 static int 869 udp_attach(struct socket *so, int proto) 870 { 871 struct inpcb *inp; 872 int error; 873 874 KASSERT(sotoinpcb(so) == NULL); 875 876 /* Assign the lock (must happen even if we will error out). */ 877 sosetlock(so); 878 879 #ifdef MBUFTRACE 880 so->so_mowner = &udp_mowner; 881 so->so_rcv.sb_mowner = &udp_rx_mowner; 882 so->so_snd.sb_mowner = &udp_tx_mowner; 883 #endif 884 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 885 error = soreserve(so, udp_sendspace, udp_recvspace); 886 if (error) { 887 return error; 888 } 889 } 890 891 error = in_pcballoc(so, &udbtable); 892 if (error) { 893 return error; 894 } 895 inp = sotoinpcb(so); 896 inp->inp_ip.ip_ttl = ip_defttl; 897 KASSERT(solocked(so)); 898 899 return error; 900 } 901 902 static void 903 udp_detach(struct socket *so) 904 { 905 struct inpcb *inp; 906 907 KASSERT(solocked(so)); 908 inp = sotoinpcb(so); 909 KASSERT(inp != NULL); 910 in_pcbdetach(inp); 911 } 912 913 static int 914 udp_accept(struct socket *so, struct sockaddr *nam) 915 { 916 KASSERT(solocked(so)); 917 918 panic("udp_accept"); 919 920 return EOPNOTSUPP; 921 } 922 923 static int 924 udp_bind(struct socket *so, struct sockaddr *nam, struct lwp *l) 925 { 926 struct inpcb *inp = sotoinpcb(so); 927 struct sockaddr_in *sin = (struct sockaddr_in *)nam; 928 int error = 0; 929 int s; 930 931 KASSERT(solocked(so)); 932 KASSERT(inp != NULL); 933 KASSERT(nam != NULL); 934 935 s = splsoftnet(); 936 error = in_pcbbind(inp, sin, l); 937 splx(s); 938 939 return error; 940 } 941 942 static int 943 udp_listen(struct socket *so, struct lwp *l) 944 { 945 KASSERT(solocked(so)); 946 947 return EOPNOTSUPP; 948 } 949 950 static int 951 udp_connect(struct socket *so, struct sockaddr *nam, struct lwp *l) 952 { 953 struct inpcb *inp = sotoinpcb(so); 954 int error = 0; 955 int s; 956 957 KASSERT(solocked(so)); 958 KASSERT(inp != NULL); 959 KASSERT(nam != NULL); 960 961 s = splsoftnet(); 962 error = in_pcbconnect(inp, (struct sockaddr_in *)nam, l); 963 if (! error) 964 soisconnected(so); 965 splx(s); 966 return error; 967 } 968 969 static int 970 udp_connect2(struct socket *so, struct socket *so2) 971 { 972 KASSERT(solocked(so)); 973 974 return EOPNOTSUPP; 975 } 976 977 static int 978 udp_disconnect(struct socket *so) 979 { 980 struct inpcb *inp = sotoinpcb(so); 981 int s; 982 983 KASSERT(solocked(so)); 984 KASSERT(inp != NULL); 985 986 s = splsoftnet(); 987 /*soisdisconnected(so);*/ 988 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 989 in_pcbdisconnect(inp); 990 inp->inp_laddr = zeroin_addr; /* XXX */ 991 in_pcbstate(inp, INP_BOUND); /* XXX */ 992 splx(s); 993 994 return 0; 995 } 996 997 static int 998 udp_shutdown(struct socket *so) 999 { 1000 int s; 1001 1002 KASSERT(solocked(so)); 1003 1004 s = splsoftnet(); 1005 socantsendmore(so); 1006 splx(s); 1007 1008 return 0; 1009 } 1010 1011 static int 1012 udp_abort(struct socket *so) 1013 { 1014 KASSERT(solocked(so)); 1015 1016 panic("udp_abort"); 1017 1018 return EOPNOTSUPP; 1019 } 1020 1021 static int 1022 udp_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp) 1023 { 1024 return in_control(so, cmd, nam, ifp); 1025 } 1026 1027 static int 1028 udp_stat(struct socket *so, struct stat *ub) 1029 { 1030 KASSERT(solocked(so)); 1031 1032 /* stat: don't bother with a blocksize. */ 1033 return 0; 1034 } 1035 1036 static int 1037 udp_peeraddr(struct socket *so, struct sockaddr *nam) 1038 { 1039 int s; 1040 1041 KASSERT(solocked(so)); 1042 KASSERT(sotoinpcb(so) != NULL); 1043 KASSERT(nam != NULL); 1044 1045 s = splsoftnet(); 1046 in_setpeeraddr(sotoinpcb(so), (struct sockaddr_in *)nam); 1047 splx(s); 1048 1049 return 0; 1050 } 1051 1052 static int 1053 udp_sockaddr(struct socket *so, struct sockaddr *nam) 1054 { 1055 int s; 1056 1057 KASSERT(solocked(so)); 1058 KASSERT(sotoinpcb(so) != NULL); 1059 KASSERT(nam != NULL); 1060 1061 s = splsoftnet(); 1062 in_setsockaddr(sotoinpcb(so), (struct sockaddr_in *)nam); 1063 splx(s); 1064 1065 return 0; 1066 } 1067 1068 static int 1069 udp_rcvd(struct socket *so, int flags, struct lwp *l) 1070 { 1071 KASSERT(solocked(so)); 1072 1073 return EOPNOTSUPP; 1074 } 1075 1076 static int 1077 udp_recvoob(struct socket *so, struct mbuf *m, int flags) 1078 { 1079 KASSERT(solocked(so)); 1080 1081 return EOPNOTSUPP; 1082 } 1083 1084 static int 1085 udp_send(struct socket *so, struct mbuf *m, struct sockaddr *nam, 1086 struct mbuf *control, struct lwp *l) 1087 { 1088 struct inpcb *inp = sotoinpcb(so); 1089 int error = 0; 1090 struct in_addr laddr; /* XXX */ 1091 int s; 1092 1093 KASSERT(solocked(so)); 1094 KASSERT(inp != NULL); 1095 KASSERT(m != NULL); 1096 1097 memset(&laddr, 0, sizeof laddr); 1098 1099 s = splsoftnet(); 1100 if (nam) { 1101 laddr = inp->inp_laddr; /* XXX */ 1102 if ((so->so_state & SS_ISCONNECTED) != 0) { 1103 error = EISCONN; 1104 goto die; 1105 } 1106 error = in_pcbconnect(inp, (struct sockaddr_in *)nam, l); 1107 if (error) 1108 goto die; 1109 } else { 1110 if ((so->so_state & SS_ISCONNECTED) == 0) { 1111 error = ENOTCONN; 1112 goto die; 1113 } 1114 } 1115 error = udp_output(m, inp, control, l); 1116 m = NULL; 1117 control = NULL; 1118 if (nam) { 1119 in_pcbdisconnect(inp); 1120 inp->inp_laddr = laddr; /* XXX */ 1121 in_pcbstate(inp, INP_BOUND); /* XXX */ 1122 } 1123 die: 1124 if (m != NULL) 1125 m_freem(m); 1126 if (control != NULL) 1127 m_freem(control); 1128 1129 splx(s); 1130 return error; 1131 } 1132 1133 static int 1134 udp_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control) 1135 { 1136 KASSERT(solocked(so)); 1137 1138 m_freem(m); 1139 m_freem(control); 1140 1141 return EOPNOTSUPP; 1142 } 1143 1144 static int 1145 udp_purgeif(struct socket *so, struct ifnet *ifp) 1146 { 1147 int s; 1148 1149 s = splsoftnet(); 1150 mutex_enter(softnet_lock); 1151 in_pcbpurgeif0(&udbtable, ifp); 1152 #ifdef NET_MPSAFE 1153 mutex_exit(softnet_lock); 1154 #endif 1155 in_purgeif(ifp); 1156 #ifdef NET_MPSAFE 1157 mutex_enter(softnet_lock); 1158 #endif 1159 in_pcbpurgeif(&udbtable, ifp); 1160 mutex_exit(softnet_lock); 1161 splx(s); 1162 1163 return 0; 1164 } 1165 1166 static int 1167 sysctl_net_inet_udp_stats(SYSCTLFN_ARGS) 1168 { 1169 1170 return (NETSTAT_SYSCTL(udpstat_percpu, UDP_NSTATS)); 1171 } 1172 1173 /* 1174 * Sysctl for udp variables. 1175 */ 1176 static void 1177 sysctl_net_inet_udp_setup(struct sysctllog **clog) 1178 { 1179 1180 sysctl_createv(clog, 0, NULL, NULL, 1181 CTLFLAG_PERMANENT, 1182 CTLTYPE_NODE, "inet", NULL, 1183 NULL, 0, NULL, 0, 1184 CTL_NET, PF_INET, CTL_EOL); 1185 sysctl_createv(clog, 0, NULL, NULL, 1186 CTLFLAG_PERMANENT, 1187 CTLTYPE_NODE, "udp", 1188 SYSCTL_DESCR("UDPv4 related settings"), 1189 NULL, 0, NULL, 0, 1190 CTL_NET, PF_INET, IPPROTO_UDP, CTL_EOL); 1191 1192 sysctl_createv(clog, 0, NULL, NULL, 1193 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1194 CTLTYPE_INT, "checksum", 1195 SYSCTL_DESCR("Compute UDP checksums"), 1196 NULL, 0, &udpcksum, 0, 1197 CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_CHECKSUM, 1198 CTL_EOL); 1199 sysctl_createv(clog, 0, NULL, NULL, 1200 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1201 CTLTYPE_INT, "sendspace", 1202 SYSCTL_DESCR("Default UDP send buffer size"), 1203 NULL, 0, &udp_sendspace, 0, 1204 CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_SENDSPACE, 1205 CTL_EOL); 1206 sysctl_createv(clog, 0, NULL, NULL, 1207 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1208 CTLTYPE_INT, "recvspace", 1209 SYSCTL_DESCR("Default UDP receive buffer size"), 1210 NULL, 0, &udp_recvspace, 0, 1211 CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_RECVSPACE, 1212 CTL_EOL); 1213 sysctl_createv(clog, 0, NULL, NULL, 1214 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1215 CTLTYPE_INT, "do_loopback_cksum", 1216 SYSCTL_DESCR("Perform UDP checksum on loopback"), 1217 NULL, 0, &udp_do_loopback_cksum, 0, 1218 CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_LOOPBACKCKSUM, 1219 CTL_EOL); 1220 sysctl_createv(clog, 0, NULL, NULL, 1221 CTLFLAG_PERMANENT, 1222 CTLTYPE_STRUCT, "pcblist", 1223 SYSCTL_DESCR("UDP protocol control block list"), 1224 sysctl_inpcblist, 0, &udbtable, 0, 1225 CTL_NET, PF_INET, IPPROTO_UDP, CTL_CREATE, 1226 CTL_EOL); 1227 sysctl_createv(clog, 0, NULL, NULL, 1228 CTLFLAG_PERMANENT, 1229 CTLTYPE_STRUCT, "stats", 1230 SYSCTL_DESCR("UDP statistics"), 1231 sysctl_net_inet_udp_stats, 0, NULL, 0, 1232 CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_STATS, 1233 CTL_EOL); 1234 } 1235 #endif 1236 1237 void 1238 udp_statinc(u_int stat) 1239 { 1240 1241 KASSERT(stat < UDP_NSTATS); 1242 UDP_STATINC(stat); 1243 } 1244 1245 #if defined(INET) && defined(IPSEC) 1246 /* 1247 * Returns: 1248 * 1 if the packet was processed 1249 * 0 if normal UDP processing should take place 1250 * -1 if an error occurred and m was freed 1251 */ 1252 static int 1253 udp4_espinudp(struct mbuf **mp, int off, struct sockaddr *src, 1254 struct socket *so) 1255 { 1256 size_t len; 1257 void *data; 1258 struct inpcb *inp; 1259 size_t skip = 0; 1260 size_t minlen; 1261 size_t iphdrlen; 1262 struct ip *ip; 1263 struct m_tag *tag; 1264 struct udphdr *udphdr; 1265 u_int16_t sport, dport; 1266 struct mbuf *m = *mp; 1267 1268 /* 1269 * Collapse the mbuf chain if the first mbuf is too short 1270 * The longest case is: UDP + non ESP marker + ESP. 1271 */ 1272 minlen = off + sizeof(u_int64_t) + sizeof(struct esp); 1273 if (minlen > m->m_pkthdr.len) 1274 minlen = m->m_pkthdr.len; 1275 1276 if (m->m_len < minlen) { 1277 if ((*mp = m_pullup(m, minlen)) == NULL) { 1278 return -1; 1279 } 1280 m = *mp; 1281 } 1282 1283 len = m->m_len - off; 1284 data = mtod(m, char *) + off; 1285 inp = sotoinpcb(so); 1286 1287 /* Ignore keepalive packets */ 1288 if ((len == 1) && (*(unsigned char *)data == 0xff)) { 1289 m_freem(m); 1290 *mp = NULL; /* avoid any further processing by caller ... */ 1291 return 1; 1292 } 1293 1294 /* 1295 * Check that the payload is long enough to hold 1296 * an ESP header and compute the length of encapsulation 1297 * header to remove 1298 */ 1299 if (inp->inp_flags & INP_ESPINUDP) { 1300 u_int32_t *st = (u_int32_t *)data; 1301 1302 if ((len <= sizeof(struct esp)) || (*st == 0)) 1303 return 0; /* Normal UDP processing */ 1304 1305 skip = sizeof(struct udphdr); 1306 } 1307 1308 if (inp->inp_flags & INP_ESPINUDP_NON_IKE) { 1309 u_int32_t *st = (u_int32_t *)data; 1310 1311 if ((len <= sizeof(u_int64_t) + sizeof(struct esp)) || 1312 ((st[0] | st[1]) != 0)) 1313 return 0; /* Normal UDP processing */ 1314 1315 skip = sizeof(struct udphdr) + sizeof(u_int64_t); 1316 } 1317 1318 /* 1319 * Get the UDP ports. They are handled in network 1320 * order everywhere in IPSEC_NAT_T code. 1321 */ 1322 udphdr = (struct udphdr *)((char *)data - skip); 1323 sport = udphdr->uh_sport; 1324 dport = udphdr->uh_dport; 1325 1326 /* 1327 * Remove the UDP header (and possibly the non ESP marker) 1328 * IP header length is iphdrlen 1329 * Before: 1330 * <--- off ---> 1331 * +----+------+-----+ 1332 * | IP | UDP | ESP | 1333 * +----+------+-----+ 1334 * <-skip-> 1335 * After: 1336 * +----+-----+ 1337 * | IP | ESP | 1338 * +----+-----+ 1339 * <-skip-> 1340 */ 1341 iphdrlen = off - sizeof(struct udphdr); 1342 memmove(mtod(m, char *) + skip, mtod(m, void *), iphdrlen); 1343 m_adj(m, skip); 1344 1345 ip = mtod(m, struct ip *); 1346 ip->ip_len = htons(ntohs(ip->ip_len) - skip); 1347 ip->ip_p = IPPROTO_ESP; 1348 1349 /* 1350 * We have modified the packet - it is now ESP, so we should not 1351 * return to UDP processing ... 1352 * 1353 * Add a PACKET_TAG_IPSEC_NAT_T_PORT tag to remember 1354 * the source UDP port. This is required if we want 1355 * to select the right SPD for multiple hosts behind 1356 * same NAT 1357 */ 1358 if ((tag = m_tag_get(PACKET_TAG_IPSEC_NAT_T_PORTS, 1359 sizeof(sport) + sizeof(dport), M_DONTWAIT)) == NULL) { 1360 m_freem(m); 1361 return -1; 1362 } 1363 ((u_int16_t *)(tag + 1))[0] = sport; 1364 ((u_int16_t *)(tag + 1))[1] = dport; 1365 m_tag_prepend(m, tag); 1366 1367 if (ipsec_used) 1368 ipsec4_common_input(m, iphdrlen, IPPROTO_ESP); 1369 else 1370 m_freem(m); 1371 1372 /* We handled it, it shouldn't be handled by UDP */ 1373 *mp = NULL; /* avoid free by caller ... */ 1374 return 1; 1375 } 1376 #endif 1377 1378 PR_WRAP_USRREQS(udp) 1379 #define udp_attach udp_attach_wrapper 1380 #define udp_detach udp_detach_wrapper 1381 #define udp_accept udp_accept_wrapper 1382 #define udp_bind udp_bind_wrapper 1383 #define udp_listen udp_listen_wrapper 1384 #define udp_connect udp_connect_wrapper 1385 #define udp_connect2 udp_connect2_wrapper 1386 #define udp_disconnect udp_disconnect_wrapper 1387 #define udp_shutdown udp_shutdown_wrapper 1388 #define udp_abort udp_abort_wrapper 1389 #define udp_ioctl udp_ioctl_wrapper 1390 #define udp_stat udp_stat_wrapper 1391 #define udp_peeraddr udp_peeraddr_wrapper 1392 #define udp_sockaddr udp_sockaddr_wrapper 1393 #define udp_rcvd udp_rcvd_wrapper 1394 #define udp_recvoob udp_recvoob_wrapper 1395 #define udp_send udp_send_wrapper 1396 #define udp_sendoob udp_sendoob_wrapper 1397 #define udp_purgeif udp_purgeif_wrapper 1398 1399 const struct pr_usrreqs udp_usrreqs = { 1400 .pr_attach = udp_attach, 1401 .pr_detach = udp_detach, 1402 .pr_accept = udp_accept, 1403 .pr_bind = udp_bind, 1404 .pr_listen = udp_listen, 1405 .pr_connect = udp_connect, 1406 .pr_connect2 = udp_connect2, 1407 .pr_disconnect = udp_disconnect, 1408 .pr_shutdown = udp_shutdown, 1409 .pr_abort = udp_abort, 1410 .pr_ioctl = udp_ioctl, 1411 .pr_stat = udp_stat, 1412 .pr_peeraddr = udp_peeraddr, 1413 .pr_sockaddr = udp_sockaddr, 1414 .pr_rcvd = udp_rcvd, 1415 .pr_recvoob = udp_recvoob, 1416 .pr_send = udp_send, 1417 .pr_sendoob = udp_sendoob, 1418 .pr_purgeif = udp_purgeif, 1419 }; 1420