1 /* $NetBSD: udp_usrreq.c,v 1.230 2017/01/24 07:09:24 ozaki-r 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 1.230 2017/01/24 07:09:24 ozaki-r Exp $"); 70 71 #ifdef _KERNEL_OPT 72 #include "opt_inet.h" 73 #include "opt_compat_netbsd.h" 74 #include "opt_ipsec.h" 75 #include "opt_inet_csum.h" 76 #include "opt_ipkdb.h" 77 #include "opt_mbuftrace.h" 78 #include "opt_net_mpsafe.h" 79 #endif 80 81 #include <sys/param.h> 82 #include <sys/mbuf.h> 83 #include <sys/once.h> 84 #include <sys/protosw.h> 85 #include <sys/socket.h> 86 #include <sys/socketvar.h> 87 #include <sys/systm.h> 88 #include <sys/proc.h> 89 #include <sys/domain.h> 90 #include <sys/sysctl.h> 91 92 #include <net/if.h> 93 94 #include <netinet/in.h> 95 #include <netinet/in_systm.h> 96 #include <netinet/in_var.h> 97 #include <netinet/ip.h> 98 #include <netinet/in_pcb.h> 99 #include <netinet/ip_var.h> 100 #include <netinet/ip_icmp.h> 101 #include <netinet/udp.h> 102 #include <netinet/udp_var.h> 103 #include <netinet/udp_private.h> 104 105 #ifdef INET6 106 #include <netinet/ip6.h> 107 #include <netinet/icmp6.h> 108 #include <netinet6/ip6_var.h> 109 #include <netinet6/ip6_private.h> 110 #include <netinet6/in6_pcb.h> 111 #include <netinet6/udp6_var.h> 112 #include <netinet6/udp6_private.h> 113 #endif 114 115 #ifndef INET6 116 /* always need ip6.h for IP6_EXTHDR_GET */ 117 #include <netinet/ip6.h> 118 #endif 119 120 #ifdef IPSEC 121 #include <netipsec/ipsec.h> 122 #include <netipsec/ipsec_var.h> 123 #include <netipsec/ipsec_private.h> 124 #include <netipsec/esp.h> 125 #ifdef INET6 126 #include <netipsec/ipsec6.h> 127 #endif 128 #endif /* IPSEC */ 129 130 #ifdef COMPAT_50 131 #include <compat/sys/socket.h> 132 #endif 133 134 #ifdef IPKDB 135 #include <ipkdb/ipkdb.h> 136 #endif 137 138 int udpcksum = 1; 139 int udp_do_loopback_cksum = 0; 140 141 struct inpcbtable udbtable; 142 143 percpu_t *udpstat_percpu; 144 145 #ifdef INET 146 #ifdef IPSEC 147 static int udp4_espinudp (struct mbuf **, int, struct sockaddr *, 148 struct socket *); 149 #endif 150 static void udp4_sendup (struct mbuf *, int, struct sockaddr *, 151 struct socket *); 152 static int udp4_realinput (struct sockaddr_in *, struct sockaddr_in *, 153 struct mbuf **, int); 154 static int udp4_input_checksum(struct mbuf *, const struct udphdr *, int, int); 155 #endif 156 #ifdef INET 157 static void udp_notify (struct inpcb *, int); 158 #endif 159 160 #ifndef UDBHASHSIZE 161 #define UDBHASHSIZE 128 162 #endif 163 int udbhashsize = UDBHASHSIZE; 164 165 /* 166 * For send - really max datagram size; for receive - 40 1K datagrams. 167 */ 168 static int udp_sendspace = 9216; 169 static int udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in)); 170 171 #ifdef MBUFTRACE 172 struct mowner udp_mowner = MOWNER_INIT("udp", ""); 173 struct mowner udp_rx_mowner = MOWNER_INIT("udp", "rx"); 174 struct mowner udp_tx_mowner = MOWNER_INIT("udp", "tx"); 175 #endif 176 177 #ifdef UDP_CSUM_COUNTERS 178 #include <sys/device.h> 179 180 #if defined(INET) 181 struct evcnt udp_hwcsum_bad = EVCNT_INITIALIZER(EVCNT_TYPE_MISC, 182 NULL, "udp", "hwcsum bad"); 183 struct evcnt udp_hwcsum_ok = EVCNT_INITIALIZER(EVCNT_TYPE_MISC, 184 NULL, "udp", "hwcsum ok"); 185 struct evcnt udp_hwcsum_data = EVCNT_INITIALIZER(EVCNT_TYPE_MISC, 186 NULL, "udp", "hwcsum data"); 187 struct evcnt udp_swcsum = EVCNT_INITIALIZER(EVCNT_TYPE_MISC, 188 NULL, "udp", "swcsum"); 189 190 EVCNT_ATTACH_STATIC(udp_hwcsum_bad); 191 EVCNT_ATTACH_STATIC(udp_hwcsum_ok); 192 EVCNT_ATTACH_STATIC(udp_hwcsum_data); 193 EVCNT_ATTACH_STATIC(udp_swcsum); 194 #endif /* defined(INET) */ 195 196 #define UDP_CSUM_COUNTER_INCR(ev) (ev)->ev_count++ 197 #else 198 #define UDP_CSUM_COUNTER_INCR(ev) /* nothing */ 199 #endif /* UDP_CSUM_COUNTERS */ 200 201 static void sysctl_net_inet_udp_setup(struct sysctllog **); 202 203 static int 204 do_udpinit(void) 205 { 206 207 in_pcbinit(&udbtable, udbhashsize, udbhashsize); 208 udpstat_percpu = percpu_alloc(sizeof(uint64_t) * UDP_NSTATS); 209 210 MOWNER_ATTACH(&udp_tx_mowner); 211 MOWNER_ATTACH(&udp_rx_mowner); 212 MOWNER_ATTACH(&udp_mowner); 213 214 return 0; 215 } 216 217 void 218 udp_init_common(void) 219 { 220 static ONCE_DECL(doudpinit); 221 222 RUN_ONCE(&doudpinit, do_udpinit); 223 } 224 225 void 226 udp_init(void) 227 { 228 229 sysctl_net_inet_udp_setup(NULL); 230 231 udp_init_common(); 232 } 233 234 /* 235 * Checksum extended UDP header and data. 236 */ 237 238 int 239 udp_input_checksum(int af, struct mbuf *m, const struct udphdr *uh, 240 int iphlen, int len) 241 { 242 243 switch (af) { 244 #ifdef INET 245 case AF_INET: 246 return udp4_input_checksum(m, uh, iphlen, len); 247 #endif 248 #ifdef INET6 249 case AF_INET6: 250 return udp6_input_checksum(m, uh, iphlen, len); 251 #endif 252 } 253 #ifdef DIAGNOSTIC 254 panic("udp_input_checksum: unknown af %d", af); 255 #endif 256 /* NOTREACHED */ 257 return -1; 258 } 259 260 #ifdef INET 261 262 /* 263 * Checksum extended UDP header and data. 264 */ 265 266 static int 267 udp4_input_checksum(struct mbuf *m, const struct udphdr *uh, 268 int iphlen, int len) 269 { 270 271 /* 272 * XXX it's better to record and check if this mbuf is 273 * already checked. 274 */ 275 276 if (uh->uh_sum == 0) 277 return 0; 278 279 switch (m->m_pkthdr.csum_flags & 280 ((m_get_rcvif_NOMPSAFE(m)->if_csum_flags_rx & M_CSUM_UDPv4) | 281 M_CSUM_TCP_UDP_BAD | M_CSUM_DATA)) { 282 case M_CSUM_UDPv4|M_CSUM_TCP_UDP_BAD: 283 UDP_CSUM_COUNTER_INCR(&udp_hwcsum_bad); 284 goto badcsum; 285 286 case M_CSUM_UDPv4|M_CSUM_DATA: { 287 u_int32_t hw_csum = m->m_pkthdr.csum_data; 288 289 UDP_CSUM_COUNTER_INCR(&udp_hwcsum_data); 290 if (m->m_pkthdr.csum_flags & M_CSUM_NO_PSEUDOHDR) { 291 const struct ip *ip = 292 mtod(m, const struct ip *); 293 294 hw_csum = in_cksum_phdr(ip->ip_src.s_addr, 295 ip->ip_dst.s_addr, 296 htons(hw_csum + len + IPPROTO_UDP)); 297 } 298 if ((hw_csum ^ 0xffff) != 0) 299 goto badcsum; 300 break; 301 } 302 303 case M_CSUM_UDPv4: 304 /* Checksum was okay. */ 305 UDP_CSUM_COUNTER_INCR(&udp_hwcsum_ok); 306 break; 307 308 default: 309 /* 310 * Need to compute it ourselves. Maybe skip checksum 311 * on loopback interfaces. 312 */ 313 if (__predict_true(!(m_get_rcvif_NOMPSAFE(m)->if_flags & 314 IFF_LOOPBACK) || 315 udp_do_loopback_cksum)) { 316 UDP_CSUM_COUNTER_INCR(&udp_swcsum); 317 if (in4_cksum(m, IPPROTO_UDP, iphlen, len) != 0) 318 goto badcsum; 319 } 320 break; 321 } 322 323 return 0; 324 325 badcsum: 326 UDP_STATINC(UDP_STAT_BADSUM); 327 return -1; 328 } 329 330 void 331 udp_input(struct mbuf *m, ...) 332 { 333 va_list ap; 334 struct sockaddr_in src, dst; 335 struct ip *ip; 336 struct udphdr *uh; 337 int iphlen; 338 int len; 339 int n; 340 u_int16_t ip_len; 341 342 va_start(ap, m); 343 iphlen = va_arg(ap, int); 344 (void)va_arg(ap, int); /* ignore value, advance ap */ 345 va_end(ap); 346 347 MCLAIM(m, &udp_rx_mowner); 348 UDP_STATINC(UDP_STAT_IPACKETS); 349 350 /* 351 * Get IP and UDP header together in first mbuf. 352 */ 353 ip = mtod(m, struct ip *); 354 IP6_EXTHDR_GET(uh, struct udphdr *, m, iphlen, sizeof(struct udphdr)); 355 if (uh == NULL) { 356 UDP_STATINC(UDP_STAT_HDROPS); 357 return; 358 } 359 /* 360 * Enforce alignment requirements that are violated in 361 * some cases, see kern/50766 for details. 362 */ 363 if (UDP_HDR_ALIGNED_P(uh) == 0) { 364 m = m_copyup(m, iphlen + sizeof(struct udphdr), 0); 365 if (m == NULL) { 366 UDP_STATINC(UDP_STAT_HDROPS); 367 return; 368 } 369 ip = mtod(m, struct ip *); 370 uh = (struct udphdr *)(mtod(m, char *) + iphlen); 371 } 372 KASSERT(UDP_HDR_ALIGNED_P(uh)); 373 374 /* destination port of 0 is illegal, based on RFC768. */ 375 if (uh->uh_dport == 0) 376 goto bad; 377 378 /* 379 * Make mbuf data length reflect UDP length. 380 * If not enough data to reflect UDP length, drop. 381 */ 382 ip_len = ntohs(ip->ip_len); 383 len = ntohs((u_int16_t)uh->uh_ulen); 384 if (ip_len != iphlen + len) { 385 if (ip_len < iphlen + len || len < sizeof(struct udphdr)) { 386 UDP_STATINC(UDP_STAT_BADLEN); 387 goto bad; 388 } 389 m_adj(m, iphlen + len - ip_len); 390 } 391 392 /* 393 * Checksum extended UDP header and data. 394 */ 395 if (udp4_input_checksum(m, uh, iphlen, len)) 396 goto badcsum; 397 398 /* construct source and dst sockaddrs. */ 399 sockaddr_in_init(&src, &ip->ip_src, uh->uh_sport); 400 sockaddr_in_init(&dst, &ip->ip_dst, uh->uh_dport); 401 402 if ((n = udp4_realinput(&src, &dst, &m, iphlen)) == -1) { 403 UDP_STATINC(UDP_STAT_HDROPS); 404 return; 405 } 406 if (m == NULL) { 407 /* 408 * packet has been processed by ESP stuff - 409 * e.g. dropped NAT-T-keep-alive-packet ... 410 */ 411 return; 412 } 413 ip = mtod(m, struct ip *); 414 #ifdef INET6 415 if (IN_MULTICAST(ip->ip_dst.s_addr) || n == 0) { 416 struct sockaddr_in6 src6, dst6; 417 418 memset(&src6, 0, sizeof(src6)); 419 src6.sin6_family = AF_INET6; 420 src6.sin6_len = sizeof(struct sockaddr_in6); 421 in6_in_2_v4mapin6(&ip->ip_src, &src6.sin6_addr); 422 src6.sin6_port = uh->uh_sport; 423 memset(&dst6, 0, sizeof(dst6)); 424 dst6.sin6_family = AF_INET6; 425 dst6.sin6_len = sizeof(struct sockaddr_in6); 426 in6_in_2_v4mapin6(&ip->ip_dst, &dst6.sin6_addr); 427 dst6.sin6_port = uh->uh_dport; 428 429 n += udp6_realinput(AF_INET, &src6, &dst6, m, iphlen); 430 } 431 #endif 432 433 if (n == 0) { 434 if (m->m_flags & (M_BCAST | M_MCAST)) { 435 UDP_STATINC(UDP_STAT_NOPORTBCAST); 436 goto bad; 437 } 438 UDP_STATINC(UDP_STAT_NOPORT); 439 #ifdef IPKDB 440 if (checkipkdb(&ip->ip_src, uh->uh_sport, uh->uh_dport, 441 m, iphlen + sizeof(struct udphdr), 442 m->m_pkthdr.len - iphlen - sizeof(struct udphdr))) { 443 /* 444 * It was a debugger connect packet, 445 * just drop it now 446 */ 447 goto bad; 448 } 449 #endif 450 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0); 451 m = NULL; 452 } 453 454 bad: 455 if (m) 456 m_freem(m); 457 return; 458 459 badcsum: 460 m_freem(m); 461 } 462 #endif 463 464 #ifdef INET 465 static void 466 udp4_sendup(struct mbuf *m, int off /* offset of data portion */, 467 struct sockaddr *src, struct socket *so) 468 { 469 struct mbuf *opts = NULL; 470 struct mbuf *n; 471 struct inpcb *inp = NULL; 472 473 if (!so) 474 return; 475 switch (so->so_proto->pr_domain->dom_family) { 476 case AF_INET: 477 inp = sotoinpcb(so); 478 break; 479 #ifdef INET6 480 case AF_INET6: 481 break; 482 #endif 483 default: 484 return; 485 } 486 487 #if defined(IPSEC) 488 /* check AH/ESP integrity. */ 489 if (ipsec_used && so != NULL && ipsec4_in_reject_so(m, so)) { 490 IPSEC_STATINC(IPSEC_STAT_IN_POLVIO); 491 if ((n = m_copypacket(m, M_DONTWAIT)) != NULL) 492 icmp_error(n, ICMP_UNREACH, ICMP_UNREACH_ADMIN_PROHIBIT, 493 0, 0); 494 return; 495 } 496 #endif /*IPSEC*/ 497 498 if ((n = m_copypacket(m, M_DONTWAIT)) != NULL) { 499 if (inp && (inp->inp_flags & INP_CONTROLOPTS 500 #ifdef SO_OTIMESTAMP 501 || so->so_options & SO_OTIMESTAMP 502 #endif 503 || so->so_options & SO_TIMESTAMP)) { 504 struct ip *ip = mtod(n, struct ip *); 505 ip_savecontrol(inp, &opts, ip, n); 506 } 507 508 m_adj(n, off); 509 if (sbappendaddr(&so->so_rcv, src, n, 510 opts) == 0) { 511 m_freem(n); 512 if (opts) 513 m_freem(opts); 514 so->so_rcv.sb_overflowed++; 515 UDP_STATINC(UDP_STAT_FULLSOCK); 516 } else 517 sorwakeup(so); 518 } 519 } 520 #endif 521 522 #ifdef INET 523 static int 524 udp4_realinput(struct sockaddr_in *src, struct sockaddr_in *dst, 525 struct mbuf **mp, int off /* offset of udphdr */) 526 { 527 u_int16_t *sport, *dport; 528 int rcvcnt; 529 struct in_addr *src4, *dst4; 530 struct inpcb_hdr *inph; 531 struct inpcb *inp; 532 struct mbuf *m = *mp; 533 534 rcvcnt = 0; 535 off += sizeof(struct udphdr); /* now, offset of payload */ 536 537 if (src->sin_family != AF_INET || dst->sin_family != AF_INET) 538 goto bad; 539 540 src4 = &src->sin_addr; 541 sport = &src->sin_port; 542 dst4 = &dst->sin_addr; 543 dport = &dst->sin_port; 544 545 if (IN_MULTICAST(dst4->s_addr) || 546 in_broadcast(*dst4, m_get_rcvif_NOMPSAFE(m))) { 547 /* 548 * Deliver a multicast or broadcast datagram to *all* sockets 549 * for which the local and remote addresses and ports match 550 * those of the incoming datagram. This allows more than 551 * one process to receive multi/broadcasts on the same port. 552 * (This really ought to be done for unicast datagrams as 553 * well, but that would cause problems with existing 554 * applications that open both address-specific sockets and 555 * a wildcard socket listening to the same port -- they would 556 * end up receiving duplicates of every unicast datagram. 557 * Those applications open the multiple sockets to overcome an 558 * inadequacy of the UDP socket interface, but for backwards 559 * compatibility we avoid the problem here rather than 560 * fixing the interface. Maybe 4.5BSD will remedy this?) 561 */ 562 563 /* 564 * KAME note: traditionally we dropped udpiphdr from mbuf here. 565 * we need udpiphdr for IPsec processing so we do that later. 566 */ 567 /* 568 * Locate pcb(s) for datagram. 569 */ 570 TAILQ_FOREACH(inph, &udbtable.inpt_queue, inph_queue) { 571 inp = (struct inpcb *)inph; 572 if (inp->inp_af != AF_INET) 573 continue; 574 575 if (inp->inp_lport != *dport) 576 continue; 577 if (!in_nullhost(inp->inp_laddr)) { 578 if (!in_hosteq(inp->inp_laddr, *dst4)) 579 continue; 580 } 581 if (!in_nullhost(inp->inp_faddr)) { 582 if (!in_hosteq(inp->inp_faddr, *src4) || 583 inp->inp_fport != *sport) 584 continue; 585 } 586 587 udp4_sendup(m, off, (struct sockaddr *)src, 588 inp->inp_socket); 589 rcvcnt++; 590 591 /* 592 * Don't look for additional matches if this one does 593 * not have either the SO_REUSEPORT or SO_REUSEADDR 594 * socket options set. This heuristic avoids searching 595 * through all pcbs in the common case of a non-shared 596 * port. It assumes that an application will never 597 * clear these options after setting them. 598 */ 599 if ((inp->inp_socket->so_options & 600 (SO_REUSEPORT|SO_REUSEADDR)) == 0) 601 break; 602 } 603 } else { 604 /* 605 * Locate pcb for datagram. 606 */ 607 inp = in_pcblookup_connect(&udbtable, *src4, *sport, *dst4, 608 *dport, 0); 609 if (inp == 0) { 610 UDP_STATINC(UDP_STAT_PCBHASHMISS); 611 inp = in_pcblookup_bind(&udbtable, *dst4, *dport); 612 if (inp == 0) 613 return rcvcnt; 614 } 615 616 #ifdef IPSEC 617 /* Handle ESP over UDP */ 618 if (inp->inp_flags & INP_ESPINUDP_ALL) { 619 struct sockaddr *sa = (struct sockaddr *)src; 620 621 switch(udp4_espinudp(mp, off, sa, inp->inp_socket)) { 622 case -1: /* Error, m was freeed */ 623 rcvcnt = -1; 624 goto bad; 625 break; 626 627 case 1: /* ESP over UDP */ 628 rcvcnt++; 629 goto bad; 630 break; 631 632 case 0: /* plain UDP */ 633 default: /* Unexpected */ 634 /* 635 * Normal UDP processing will take place 636 * m may have changed. 637 */ 638 m = *mp; 639 break; 640 } 641 } 642 #endif 643 644 /* 645 * Check the minimum TTL for socket. 646 */ 647 if (mtod(m, struct ip *)->ip_ttl < inp->inp_ip_minttl) 648 goto bad; 649 650 udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket); 651 rcvcnt++; 652 } 653 654 bad: 655 return rcvcnt; 656 } 657 #endif 658 659 #ifdef INET 660 /* 661 * Notify a udp user of an asynchronous error; 662 * just wake up so that he can collect error status. 663 */ 664 static void 665 udp_notify(struct inpcb *inp, int errno) 666 { 667 inp->inp_socket->so_error = errno; 668 sorwakeup(inp->inp_socket); 669 sowwakeup(inp->inp_socket); 670 } 671 672 void * 673 udp_ctlinput(int cmd, const struct sockaddr *sa, void *v) 674 { 675 struct ip *ip = v; 676 struct udphdr *uh; 677 void (*notify)(struct inpcb *, int) = udp_notify; 678 int errno; 679 680 if (sa->sa_family != AF_INET 681 || sa->sa_len != sizeof(struct sockaddr_in)) 682 return NULL; 683 if ((unsigned)cmd >= PRC_NCMDS) 684 return NULL; 685 errno = inetctlerrmap[cmd]; 686 if (PRC_IS_REDIRECT(cmd)) 687 notify = in_rtchange, ip = 0; 688 else if (cmd == PRC_HOSTDEAD) 689 ip = 0; 690 else if (errno == 0) 691 return NULL; 692 if (ip) { 693 uh = (struct udphdr *)((char *)ip + (ip->ip_hl << 2)); 694 in_pcbnotify(&udbtable, satocsin(sa)->sin_addr, uh->uh_dport, 695 ip->ip_src, uh->uh_sport, errno, notify); 696 697 /* XXX mapped address case */ 698 } else 699 in_pcbnotifyall(&udbtable, satocsin(sa)->sin_addr, errno, 700 notify); 701 return NULL; 702 } 703 704 int 705 udp_ctloutput(int op, struct socket *so, struct sockopt *sopt) 706 { 707 int s; 708 int error = 0; 709 struct inpcb *inp; 710 int family; 711 int optval; 712 713 family = so->so_proto->pr_domain->dom_family; 714 715 s = splsoftnet(); 716 switch (family) { 717 #ifdef INET 718 case PF_INET: 719 if (sopt->sopt_level != IPPROTO_UDP) { 720 error = ip_ctloutput(op, so, sopt); 721 goto end; 722 } 723 break; 724 #endif 725 #ifdef INET6 726 case PF_INET6: 727 if (sopt->sopt_level != IPPROTO_UDP) { 728 error = ip6_ctloutput(op, so, sopt); 729 goto end; 730 } 731 break; 732 #endif 733 default: 734 error = EAFNOSUPPORT; 735 goto end; 736 } 737 738 739 switch (op) { 740 case PRCO_SETOPT: 741 inp = sotoinpcb(so); 742 743 switch (sopt->sopt_name) { 744 case UDP_ENCAP: 745 error = sockopt_getint(sopt, &optval); 746 if (error) 747 break; 748 749 switch(optval) { 750 case 0: 751 inp->inp_flags &= ~INP_ESPINUDP_ALL; 752 break; 753 754 case UDP_ENCAP_ESPINUDP: 755 inp->inp_flags &= ~INP_ESPINUDP_ALL; 756 inp->inp_flags |= INP_ESPINUDP; 757 break; 758 759 case UDP_ENCAP_ESPINUDP_NON_IKE: 760 inp->inp_flags &= ~INP_ESPINUDP_ALL; 761 inp->inp_flags |= INP_ESPINUDP_NON_IKE; 762 break; 763 default: 764 error = EINVAL; 765 break; 766 } 767 break; 768 769 default: 770 error = ENOPROTOOPT; 771 break; 772 } 773 break; 774 775 default: 776 error = EINVAL; 777 break; 778 } 779 780 end: 781 splx(s); 782 return error; 783 } 784 785 786 int 787 udp_output(struct mbuf *m, struct inpcb *inp) 788 { 789 struct udpiphdr *ui; 790 struct route *ro; 791 int len = m->m_pkthdr.len; 792 int error = 0; 793 794 MCLAIM(m, &udp_tx_mowner); 795 796 /* 797 * Calculate data length and get a mbuf 798 * for UDP and IP headers. 799 */ 800 M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT); 801 if (m == 0) { 802 error = ENOBUFS; 803 goto release; 804 } 805 806 /* 807 * Compute the packet length of the IP header, and 808 * punt if the length looks bogus. 809 */ 810 if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) { 811 error = EMSGSIZE; 812 goto release; 813 } 814 815 /* 816 * Fill in mbuf with extended UDP header 817 * and addresses and length put into network format. 818 */ 819 ui = mtod(m, struct udpiphdr *); 820 ui->ui_pr = IPPROTO_UDP; 821 ui->ui_src = inp->inp_laddr; 822 ui->ui_dst = inp->inp_faddr; 823 ui->ui_sport = inp->inp_lport; 824 ui->ui_dport = inp->inp_fport; 825 ui->ui_ulen = htons((u_int16_t)len + sizeof(struct udphdr)); 826 827 ro = &inp->inp_route; 828 829 /* 830 * Set up checksum and output datagram. 831 */ 832 if (udpcksum) { 833 /* 834 * XXX Cache pseudo-header checksum part for 835 * XXX "connected" UDP sockets. 836 */ 837 ui->ui_sum = in_cksum_phdr(ui->ui_src.s_addr, 838 ui->ui_dst.s_addr, htons((u_int16_t)len + 839 sizeof(struct udphdr) + IPPROTO_UDP)); 840 m->m_pkthdr.csum_flags = M_CSUM_UDPv4; 841 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum); 842 } else 843 ui->ui_sum = 0; 844 ((struct ip *)ui)->ip_len = htons(sizeof (struct udpiphdr) + len); 845 ((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */ 846 ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */ 847 UDP_STATINC(UDP_STAT_OPACKETS); 848 849 return (ip_output(m, inp->inp_options, ro, 850 inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST), 851 inp->inp_moptions, inp->inp_socket)); 852 853 release: 854 m_freem(m); 855 return (error); 856 } 857 858 static int 859 udp_attach(struct socket *so, int proto) 860 { 861 struct inpcb *inp; 862 int error; 863 864 KASSERT(sotoinpcb(so) == NULL); 865 866 /* Assign the lock (must happen even if we will error out). */ 867 sosetlock(so); 868 869 #ifdef MBUFTRACE 870 so->so_mowner = &udp_mowner; 871 so->so_rcv.sb_mowner = &udp_rx_mowner; 872 so->so_snd.sb_mowner = &udp_tx_mowner; 873 #endif 874 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 875 error = soreserve(so, udp_sendspace, udp_recvspace); 876 if (error) { 877 return error; 878 } 879 } 880 881 error = in_pcballoc(so, &udbtable); 882 if (error) { 883 return error; 884 } 885 inp = sotoinpcb(so); 886 inp->inp_ip.ip_ttl = ip_defttl; 887 KASSERT(solocked(so)); 888 889 return error; 890 } 891 892 static void 893 udp_detach(struct socket *so) 894 { 895 struct inpcb *inp; 896 897 KASSERT(solocked(so)); 898 inp = sotoinpcb(so); 899 KASSERT(inp != NULL); 900 in_pcbdetach(inp); 901 } 902 903 static int 904 udp_accept(struct socket *so, struct sockaddr *nam) 905 { 906 KASSERT(solocked(so)); 907 908 panic("udp_accept"); 909 910 return EOPNOTSUPP; 911 } 912 913 static int 914 udp_bind(struct socket *so, struct sockaddr *nam, struct lwp *l) 915 { 916 struct inpcb *inp = sotoinpcb(so); 917 struct sockaddr_in *sin = (struct sockaddr_in *)nam; 918 int error = 0; 919 int s; 920 921 KASSERT(solocked(so)); 922 KASSERT(inp != NULL); 923 KASSERT(nam != NULL); 924 925 s = splsoftnet(); 926 error = in_pcbbind(inp, sin, l); 927 splx(s); 928 929 return error; 930 } 931 932 static int 933 udp_listen(struct socket *so, struct lwp *l) 934 { 935 KASSERT(solocked(so)); 936 937 return EOPNOTSUPP; 938 } 939 940 static int 941 udp_connect(struct socket *so, struct sockaddr *nam, struct lwp *l) 942 { 943 struct inpcb *inp = sotoinpcb(so); 944 int error = 0; 945 int s; 946 947 KASSERT(solocked(so)); 948 KASSERT(inp != NULL); 949 KASSERT(nam != NULL); 950 951 s = splsoftnet(); 952 error = in_pcbconnect(inp, (struct sockaddr_in *)nam, l); 953 if (! error) 954 soisconnected(so); 955 splx(s); 956 return error; 957 } 958 959 static int 960 udp_connect2(struct socket *so, struct socket *so2) 961 { 962 KASSERT(solocked(so)); 963 964 return EOPNOTSUPP; 965 } 966 967 static int 968 udp_disconnect(struct socket *so) 969 { 970 struct inpcb *inp = sotoinpcb(so); 971 int s; 972 973 KASSERT(solocked(so)); 974 KASSERT(inp != NULL); 975 976 s = splsoftnet(); 977 /*soisdisconnected(so);*/ 978 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 979 in_pcbdisconnect(inp); 980 inp->inp_laddr = zeroin_addr; /* XXX */ 981 in_pcbstate(inp, INP_BOUND); /* XXX */ 982 splx(s); 983 984 return 0; 985 } 986 987 static int 988 udp_shutdown(struct socket *so) 989 { 990 int s; 991 992 KASSERT(solocked(so)); 993 994 s = splsoftnet(); 995 socantsendmore(so); 996 splx(s); 997 998 return 0; 999 } 1000 1001 static int 1002 udp_abort(struct socket *so) 1003 { 1004 KASSERT(solocked(so)); 1005 1006 panic("udp_abort"); 1007 1008 return EOPNOTSUPP; 1009 } 1010 1011 static int 1012 udp_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp) 1013 { 1014 return in_control(so, cmd, nam, ifp); 1015 } 1016 1017 static int 1018 udp_stat(struct socket *so, struct stat *ub) 1019 { 1020 KASSERT(solocked(so)); 1021 1022 /* stat: don't bother with a blocksize. */ 1023 return 0; 1024 } 1025 1026 static int 1027 udp_peeraddr(struct socket *so, struct sockaddr *nam) 1028 { 1029 int s; 1030 1031 KASSERT(solocked(so)); 1032 KASSERT(sotoinpcb(so) != NULL); 1033 KASSERT(nam != NULL); 1034 1035 s = splsoftnet(); 1036 in_setpeeraddr(sotoinpcb(so), (struct sockaddr_in *)nam); 1037 splx(s); 1038 1039 return 0; 1040 } 1041 1042 static int 1043 udp_sockaddr(struct socket *so, struct sockaddr *nam) 1044 { 1045 int s; 1046 1047 KASSERT(solocked(so)); 1048 KASSERT(sotoinpcb(so) != NULL); 1049 KASSERT(nam != NULL); 1050 1051 s = splsoftnet(); 1052 in_setsockaddr(sotoinpcb(so), (struct sockaddr_in *)nam); 1053 splx(s); 1054 1055 return 0; 1056 } 1057 1058 static int 1059 udp_rcvd(struct socket *so, int flags, struct lwp *l) 1060 { 1061 KASSERT(solocked(so)); 1062 1063 return EOPNOTSUPP; 1064 } 1065 1066 static int 1067 udp_recvoob(struct socket *so, struct mbuf *m, int flags) 1068 { 1069 KASSERT(solocked(so)); 1070 1071 return EOPNOTSUPP; 1072 } 1073 1074 static int 1075 udp_send(struct socket *so, struct mbuf *m, struct sockaddr *nam, 1076 struct mbuf *control, struct lwp *l) 1077 { 1078 struct inpcb *inp = sotoinpcb(so); 1079 int error = 0; 1080 struct in_addr laddr; /* XXX */ 1081 int s; 1082 1083 KASSERT(solocked(so)); 1084 KASSERT(inp != NULL); 1085 KASSERT(m != NULL); 1086 1087 if (control && control->m_len) { 1088 m_freem(control); 1089 m_freem(m); 1090 return EINVAL; 1091 } 1092 1093 memset(&laddr, 0, sizeof laddr); 1094 1095 s = splsoftnet(); 1096 if (nam) { 1097 laddr = inp->inp_laddr; /* XXX */ 1098 if ((so->so_state & SS_ISCONNECTED) != 0) { 1099 error = EISCONN; 1100 goto die; 1101 } 1102 error = in_pcbconnect(inp, (struct sockaddr_in *)nam, l); 1103 if (error) 1104 goto die; 1105 } else { 1106 if ((so->so_state & SS_ISCONNECTED) == 0) { 1107 error = ENOTCONN; 1108 goto die; 1109 } 1110 } 1111 error = udp_output(m, inp); 1112 m = NULL; 1113 if (nam) { 1114 in_pcbdisconnect(inp); 1115 inp->inp_laddr = laddr; /* XXX */ 1116 in_pcbstate(inp, INP_BOUND); /* XXX */ 1117 } 1118 die: 1119 if (m) 1120 m_freem(m); 1121 1122 splx(s); 1123 return error; 1124 } 1125 1126 static int 1127 udp_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control) 1128 { 1129 KASSERT(solocked(so)); 1130 1131 m_freem(m); 1132 m_freem(control); 1133 1134 return EOPNOTSUPP; 1135 } 1136 1137 static int 1138 udp_purgeif(struct socket *so, struct ifnet *ifp) 1139 { 1140 int s; 1141 1142 s = splsoftnet(); 1143 mutex_enter(softnet_lock); 1144 in_pcbpurgeif0(&udbtable, ifp); 1145 #ifdef NET_MPSAFE 1146 mutex_exit(softnet_lock); 1147 #endif 1148 in_purgeif(ifp); 1149 #ifdef NET_MPSAFE 1150 mutex_enter(softnet_lock); 1151 #endif 1152 in_pcbpurgeif(&udbtable, ifp); 1153 mutex_exit(softnet_lock); 1154 splx(s); 1155 1156 return 0; 1157 } 1158 1159 static int 1160 sysctl_net_inet_udp_stats(SYSCTLFN_ARGS) 1161 { 1162 1163 return (NETSTAT_SYSCTL(udpstat_percpu, UDP_NSTATS)); 1164 } 1165 1166 /* 1167 * Sysctl for udp variables. 1168 */ 1169 static void 1170 sysctl_net_inet_udp_setup(struct sysctllog **clog) 1171 { 1172 1173 sysctl_createv(clog, 0, NULL, NULL, 1174 CTLFLAG_PERMANENT, 1175 CTLTYPE_NODE, "inet", NULL, 1176 NULL, 0, NULL, 0, 1177 CTL_NET, PF_INET, CTL_EOL); 1178 sysctl_createv(clog, 0, NULL, NULL, 1179 CTLFLAG_PERMANENT, 1180 CTLTYPE_NODE, "udp", 1181 SYSCTL_DESCR("UDPv4 related settings"), 1182 NULL, 0, NULL, 0, 1183 CTL_NET, PF_INET, IPPROTO_UDP, CTL_EOL); 1184 1185 sysctl_createv(clog, 0, NULL, NULL, 1186 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1187 CTLTYPE_INT, "checksum", 1188 SYSCTL_DESCR("Compute UDP checksums"), 1189 NULL, 0, &udpcksum, 0, 1190 CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_CHECKSUM, 1191 CTL_EOL); 1192 sysctl_createv(clog, 0, NULL, NULL, 1193 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1194 CTLTYPE_INT, "sendspace", 1195 SYSCTL_DESCR("Default UDP send buffer size"), 1196 NULL, 0, &udp_sendspace, 0, 1197 CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_SENDSPACE, 1198 CTL_EOL); 1199 sysctl_createv(clog, 0, NULL, NULL, 1200 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1201 CTLTYPE_INT, "recvspace", 1202 SYSCTL_DESCR("Default UDP receive buffer size"), 1203 NULL, 0, &udp_recvspace, 0, 1204 CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_RECVSPACE, 1205 CTL_EOL); 1206 sysctl_createv(clog, 0, NULL, NULL, 1207 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1208 CTLTYPE_INT, "do_loopback_cksum", 1209 SYSCTL_DESCR("Perform UDP checksum on loopback"), 1210 NULL, 0, &udp_do_loopback_cksum, 0, 1211 CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_LOOPBACKCKSUM, 1212 CTL_EOL); 1213 sysctl_createv(clog, 0, NULL, NULL, 1214 CTLFLAG_PERMANENT, 1215 CTLTYPE_STRUCT, "pcblist", 1216 SYSCTL_DESCR("UDP protocol control block list"), 1217 sysctl_inpcblist, 0, &udbtable, 0, 1218 CTL_NET, PF_INET, IPPROTO_UDP, CTL_CREATE, 1219 CTL_EOL); 1220 sysctl_createv(clog, 0, NULL, NULL, 1221 CTLFLAG_PERMANENT, 1222 CTLTYPE_STRUCT, "stats", 1223 SYSCTL_DESCR("UDP statistics"), 1224 sysctl_net_inet_udp_stats, 0, NULL, 0, 1225 CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_STATS, 1226 CTL_EOL); 1227 } 1228 #endif 1229 1230 void 1231 udp_statinc(u_int stat) 1232 { 1233 1234 KASSERT(stat < UDP_NSTATS); 1235 UDP_STATINC(stat); 1236 } 1237 1238 #if defined(INET) && defined(IPSEC) 1239 /* 1240 * Returns: 1241 * 1 if the packet was processed 1242 * 0 if normal UDP processing should take place 1243 * -1 if an error occurent and m was freed 1244 */ 1245 static int 1246 udp4_espinudp(struct mbuf **mp, int off, struct sockaddr *src, 1247 struct socket *so) 1248 { 1249 size_t len; 1250 void *data; 1251 struct inpcb *inp; 1252 size_t skip = 0; 1253 size_t minlen; 1254 size_t iphdrlen; 1255 struct ip *ip; 1256 struct m_tag *tag; 1257 struct udphdr *udphdr; 1258 u_int16_t sport, dport; 1259 struct mbuf *m = *mp; 1260 1261 /* 1262 * Collapse the mbuf chain if the first mbuf is too short 1263 * The longest case is: UDP + non ESP marker + ESP 1264 */ 1265 minlen = off + sizeof(u_int64_t) + sizeof(struct esp); 1266 if (minlen > m->m_pkthdr.len) 1267 minlen = m->m_pkthdr.len; 1268 1269 if (m->m_len < minlen) { 1270 if ((*mp = m_pullup(m, minlen)) == NULL) { 1271 printf("udp4_espinudp: m_pullup failed\n"); 1272 return -1; 1273 } 1274 m = *mp; 1275 } 1276 1277 len = m->m_len - off; 1278 data = mtod(m, char *) + off; 1279 inp = sotoinpcb(so); 1280 1281 /* Ignore keepalive packets */ 1282 if ((len == 1) && (*(unsigned char *)data == 0xff)) { 1283 m_free(m); 1284 *mp = NULL; /* avoid any further processiong by caller ... */ 1285 return 1; 1286 } 1287 1288 /* 1289 * Check that the payload is long enough to hold 1290 * an ESP header and compute the length of encapsulation 1291 * header to remove 1292 */ 1293 if (inp->inp_flags & INP_ESPINUDP) { 1294 u_int32_t *st = (u_int32_t *)data; 1295 1296 if ((len <= sizeof(struct esp)) || (*st == 0)) 1297 return 0; /* Normal UDP processing */ 1298 1299 skip = sizeof(struct udphdr); 1300 } 1301 1302 if (inp->inp_flags & INP_ESPINUDP_NON_IKE) { 1303 u_int32_t *st = (u_int32_t *)data; 1304 1305 if ((len <= sizeof(u_int64_t) + sizeof(struct esp)) 1306 || ((st[0] | st[1]) != 0)) 1307 return 0; /* Normal UDP processing */ 1308 1309 skip = sizeof(struct udphdr) + sizeof(u_int64_t); 1310 } 1311 1312 /* 1313 * Get the UDP ports. They are handled in network 1314 * order everywhere in IPSEC_NAT_T code. 1315 */ 1316 udphdr = (struct udphdr *)((char *)data - skip); 1317 sport = udphdr->uh_sport; 1318 dport = udphdr->uh_dport; 1319 1320 /* 1321 * Remove the UDP header (and possibly the non ESP marker) 1322 * IP header lendth is iphdrlen 1323 * Before: 1324 * <--- off ---> 1325 * +----+------+-----+ 1326 * | IP | UDP | ESP | 1327 * +----+------+-----+ 1328 * <-skip-> 1329 * After: 1330 * +----+-----+ 1331 * | IP | ESP | 1332 * +----+-----+ 1333 * <-skip-> 1334 */ 1335 iphdrlen = off - sizeof(struct udphdr); 1336 memmove(mtod(m, char *) + skip, mtod(m, void *), iphdrlen); 1337 m_adj(m, skip); 1338 1339 ip = mtod(m, struct ip *); 1340 ip->ip_len = htons(ntohs(ip->ip_len) - skip); 1341 ip->ip_p = IPPROTO_ESP; 1342 1343 /* 1344 * We have modified the packet - it is now ESP, so we should not 1345 * return to UDP processing ... 1346 * 1347 * Add a PACKET_TAG_IPSEC_NAT_T_PORT tag to remember 1348 * the source UDP port. This is required if we want 1349 * to select the right SPD for multiple hosts behind 1350 * same NAT 1351 */ 1352 if ((tag = m_tag_get(PACKET_TAG_IPSEC_NAT_T_PORTS, 1353 sizeof(sport) + sizeof(dport), M_DONTWAIT)) == NULL) { 1354 printf("udp4_espinudp: m_tag_get failed\n"); 1355 m_freem(m); 1356 return -1; 1357 } 1358 ((u_int16_t *)(tag + 1))[0] = sport; 1359 ((u_int16_t *)(tag + 1))[1] = dport; 1360 m_tag_prepend(m, tag); 1361 1362 if (ipsec_used) 1363 ipsec4_common_input(m, iphdrlen, IPPROTO_ESP); 1364 /* XXX: else */ 1365 1366 /* We handled it, it shouldn't be handled by UDP */ 1367 *mp = NULL; /* avoid free by caller ... */ 1368 return 1; 1369 } 1370 #endif 1371 1372 PR_WRAP_USRREQS(udp) 1373 #define udp_attach udp_attach_wrapper 1374 #define udp_detach udp_detach_wrapper 1375 #define udp_accept udp_accept_wrapper 1376 #define udp_bind udp_bind_wrapper 1377 #define udp_listen udp_listen_wrapper 1378 #define udp_connect udp_connect_wrapper 1379 #define udp_connect2 udp_connect2_wrapper 1380 #define udp_disconnect udp_disconnect_wrapper 1381 #define udp_shutdown udp_shutdown_wrapper 1382 #define udp_abort udp_abort_wrapper 1383 #define udp_ioctl udp_ioctl_wrapper 1384 #define udp_stat udp_stat_wrapper 1385 #define udp_peeraddr udp_peeraddr_wrapper 1386 #define udp_sockaddr udp_sockaddr_wrapper 1387 #define udp_rcvd udp_rcvd_wrapper 1388 #define udp_recvoob udp_recvoob_wrapper 1389 #define udp_send udp_send_wrapper 1390 #define udp_sendoob udp_sendoob_wrapper 1391 #define udp_purgeif udp_purgeif_wrapper 1392 1393 const struct pr_usrreqs udp_usrreqs = { 1394 .pr_attach = udp_attach, 1395 .pr_detach = udp_detach, 1396 .pr_accept = udp_accept, 1397 .pr_bind = udp_bind, 1398 .pr_listen = udp_listen, 1399 .pr_connect = udp_connect, 1400 .pr_connect2 = udp_connect2, 1401 .pr_disconnect = udp_disconnect, 1402 .pr_shutdown = udp_shutdown, 1403 .pr_abort = udp_abort, 1404 .pr_ioctl = udp_ioctl, 1405 .pr_stat = udp_stat, 1406 .pr_peeraddr = udp_peeraddr, 1407 .pr_sockaddr = udp_sockaddr, 1408 .pr_rcvd = udp_rcvd, 1409 .pr_recvoob = udp_recvoob, 1410 .pr_send = udp_send, 1411 .pr_sendoob = udp_sendoob, 1412 .pr_purgeif = udp_purgeif, 1413 }; 1414