1 /* $NetBSD: udp_usrreq.c,v 1.224 2016/02/15 14:59:03 rtr 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 1.224 2016/02/15 14:59:03 rtr 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 #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 #include <net/route.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->m_pkthdr.rcvif->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->m_pkthdr.rcvif->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 KASSERT(UDP_HDR_ALIGNED_P(uh)); 360 361 /* destination port of 0 is illegal, based on RFC768. */ 362 if (uh->uh_dport == 0) 363 goto bad; 364 365 /* 366 * Make mbuf data length reflect UDP length. 367 * If not enough data to reflect UDP length, drop. 368 */ 369 ip_len = ntohs(ip->ip_len); 370 len = ntohs((u_int16_t)uh->uh_ulen); 371 if (ip_len != iphlen + len) { 372 if (ip_len < iphlen + len || len < sizeof(struct udphdr)) { 373 UDP_STATINC(UDP_STAT_BADLEN); 374 goto bad; 375 } 376 m_adj(m, iphlen + len - ip_len); 377 } 378 379 /* 380 * Checksum extended UDP header and data. 381 */ 382 if (udp4_input_checksum(m, uh, iphlen, len)) 383 goto badcsum; 384 385 /* construct source and dst sockaddrs. */ 386 sockaddr_in_init(&src, &ip->ip_src, uh->uh_sport); 387 sockaddr_in_init(&dst, &ip->ip_dst, uh->uh_dport); 388 389 if ((n = udp4_realinput(&src, &dst, &m, iphlen)) == -1) { 390 UDP_STATINC(UDP_STAT_HDROPS); 391 return; 392 } 393 if (m == NULL) { 394 /* 395 * packet has been processed by ESP stuff - 396 * e.g. dropped NAT-T-keep-alive-packet ... 397 */ 398 return; 399 } 400 ip = mtod(m, struct ip *); 401 #ifdef INET6 402 if (IN_MULTICAST(ip->ip_dst.s_addr) || n == 0) { 403 struct sockaddr_in6 src6, dst6; 404 405 memset(&src6, 0, sizeof(src6)); 406 src6.sin6_family = AF_INET6; 407 src6.sin6_len = sizeof(struct sockaddr_in6); 408 in6_in_2_v4mapin6(&ip->ip_src, &src6.sin6_addr); 409 src6.sin6_port = uh->uh_sport; 410 memset(&dst6, 0, sizeof(dst6)); 411 dst6.sin6_family = AF_INET6; 412 dst6.sin6_len = sizeof(struct sockaddr_in6); 413 in6_in_2_v4mapin6(&ip->ip_dst, &dst6.sin6_addr); 414 dst6.sin6_port = uh->uh_dport; 415 416 n += udp6_realinput(AF_INET, &src6, &dst6, m, iphlen); 417 } 418 #endif 419 420 if (n == 0) { 421 if (m->m_flags & (M_BCAST | M_MCAST)) { 422 UDP_STATINC(UDP_STAT_NOPORTBCAST); 423 goto bad; 424 } 425 UDP_STATINC(UDP_STAT_NOPORT); 426 #ifdef IPKDB 427 if (checkipkdb(&ip->ip_src, uh->uh_sport, uh->uh_dport, 428 m, iphlen + sizeof(struct udphdr), 429 m->m_pkthdr.len - iphlen - sizeof(struct udphdr))) { 430 /* 431 * It was a debugger connect packet, 432 * just drop it now 433 */ 434 goto bad; 435 } 436 #endif 437 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0); 438 m = NULL; 439 } 440 441 bad: 442 if (m) 443 m_freem(m); 444 return; 445 446 badcsum: 447 m_freem(m); 448 } 449 #endif 450 451 #ifdef INET 452 static void 453 udp4_sendup(struct mbuf *m, int off /* offset of data portion */, 454 struct sockaddr *src, struct socket *so) 455 { 456 struct mbuf *opts = NULL; 457 struct mbuf *n; 458 struct inpcb *inp = NULL; 459 460 if (!so) 461 return; 462 switch (so->so_proto->pr_domain->dom_family) { 463 case AF_INET: 464 inp = sotoinpcb(so); 465 break; 466 #ifdef INET6 467 case AF_INET6: 468 break; 469 #endif 470 default: 471 return; 472 } 473 474 #if defined(IPSEC) 475 /* check AH/ESP integrity. */ 476 if (ipsec_used && so != NULL && ipsec4_in_reject_so(m, so)) { 477 IPSEC_STATINC(IPSEC_STAT_IN_POLVIO); 478 if ((n = m_copypacket(m, M_DONTWAIT)) != NULL) 479 icmp_error(n, ICMP_UNREACH, ICMP_UNREACH_ADMIN_PROHIBIT, 480 0, 0); 481 return; 482 } 483 #endif /*IPSEC*/ 484 485 if ((n = m_copypacket(m, M_DONTWAIT)) != NULL) { 486 if (inp && (inp->inp_flags & INP_CONTROLOPTS 487 #ifdef SO_OTIMESTAMP 488 || so->so_options & SO_OTIMESTAMP 489 #endif 490 || so->so_options & SO_TIMESTAMP)) { 491 struct ip *ip = mtod(n, struct ip *); 492 ip_savecontrol(inp, &opts, ip, n); 493 } 494 495 m_adj(n, off); 496 if (sbappendaddr(&so->so_rcv, src, n, 497 opts) == 0) { 498 m_freem(n); 499 if (opts) 500 m_freem(opts); 501 so->so_rcv.sb_overflowed++; 502 UDP_STATINC(UDP_STAT_FULLSOCK); 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->m_pkthdr.rcvif)) { 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 freeed */ 610 rcvcnt = -1; 611 goto bad; 612 break; 613 614 case 1: /* ESP over UDP */ 615 rcvcnt++; 616 goto bad; 617 break; 618 619 case 0: /* plain UDP */ 620 default: /* Unexpected */ 621 /* 622 * Normal UDP processing will take place 623 * m may have changed. 624 */ 625 m = *mp; 626 break; 627 } 628 } 629 #endif 630 631 /* 632 * Check the minimum TTL for socket. 633 */ 634 if (mtod(m, struct ip *)->ip_ttl < inp->inp_ip_minttl) 635 goto bad; 636 637 udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket); 638 rcvcnt++; 639 } 640 641 bad: 642 return rcvcnt; 643 } 644 #endif 645 646 #ifdef INET 647 /* 648 * Notify a udp user of an asynchronous error; 649 * just wake up so that he can collect error status. 650 */ 651 static void 652 udp_notify(struct inpcb *inp, int errno) 653 { 654 inp->inp_socket->so_error = errno; 655 sorwakeup(inp->inp_socket); 656 sowwakeup(inp->inp_socket); 657 } 658 659 void * 660 udp_ctlinput(int cmd, const struct sockaddr *sa, void *v) 661 { 662 struct ip *ip = v; 663 struct udphdr *uh; 664 void (*notify)(struct inpcb *, int) = udp_notify; 665 int errno; 666 667 if (sa->sa_family != AF_INET 668 || sa->sa_len != sizeof(struct sockaddr_in)) 669 return NULL; 670 if ((unsigned)cmd >= PRC_NCMDS) 671 return NULL; 672 errno = inetctlerrmap[cmd]; 673 if (PRC_IS_REDIRECT(cmd)) 674 notify = in_rtchange, ip = 0; 675 else if (cmd == PRC_HOSTDEAD) 676 ip = 0; 677 else if (errno == 0) 678 return NULL; 679 if (ip) { 680 uh = (struct udphdr *)((char *)ip + (ip->ip_hl << 2)); 681 in_pcbnotify(&udbtable, satocsin(sa)->sin_addr, uh->uh_dport, 682 ip->ip_src, uh->uh_sport, errno, notify); 683 684 /* XXX mapped address case */ 685 } else 686 in_pcbnotifyall(&udbtable, satocsin(sa)->sin_addr, errno, 687 notify); 688 return NULL; 689 } 690 691 int 692 udp_ctloutput(int op, struct socket *so, struct sockopt *sopt) 693 { 694 int s; 695 int error = 0; 696 struct inpcb *inp; 697 int family; 698 int optval; 699 700 family = so->so_proto->pr_domain->dom_family; 701 702 s = splsoftnet(); 703 switch (family) { 704 #ifdef INET 705 case PF_INET: 706 if (sopt->sopt_level != IPPROTO_UDP) { 707 error = ip_ctloutput(op, so, sopt); 708 goto end; 709 } 710 break; 711 #endif 712 #ifdef INET6 713 case PF_INET6: 714 if (sopt->sopt_level != IPPROTO_UDP) { 715 error = ip6_ctloutput(op, so, sopt); 716 goto end; 717 } 718 break; 719 #endif 720 default: 721 error = EAFNOSUPPORT; 722 goto end; 723 } 724 725 726 switch (op) { 727 case PRCO_SETOPT: 728 inp = sotoinpcb(so); 729 730 switch (sopt->sopt_name) { 731 case UDP_ENCAP: 732 error = sockopt_getint(sopt, &optval); 733 if (error) 734 break; 735 736 switch(optval) { 737 case 0: 738 inp->inp_flags &= ~INP_ESPINUDP_ALL; 739 break; 740 741 case UDP_ENCAP_ESPINUDP: 742 inp->inp_flags &= ~INP_ESPINUDP_ALL; 743 inp->inp_flags |= INP_ESPINUDP; 744 break; 745 746 case UDP_ENCAP_ESPINUDP_NON_IKE: 747 inp->inp_flags &= ~INP_ESPINUDP_ALL; 748 inp->inp_flags |= INP_ESPINUDP_NON_IKE; 749 break; 750 default: 751 error = EINVAL; 752 break; 753 } 754 break; 755 756 default: 757 error = ENOPROTOOPT; 758 break; 759 } 760 break; 761 762 default: 763 error = EINVAL; 764 break; 765 } 766 767 end: 768 splx(s); 769 return error; 770 } 771 772 773 int 774 udp_output(struct mbuf *m, struct inpcb *inp) 775 { 776 struct udpiphdr *ui; 777 struct route *ro; 778 int len = m->m_pkthdr.len; 779 int error = 0; 780 781 MCLAIM(m, &udp_tx_mowner); 782 783 /* 784 * Calculate data length and get a mbuf 785 * for UDP and IP headers. 786 */ 787 M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT); 788 if (m == 0) { 789 error = ENOBUFS; 790 goto release; 791 } 792 793 /* 794 * Compute the packet length of the IP header, and 795 * punt if the length looks bogus. 796 */ 797 if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) { 798 error = EMSGSIZE; 799 goto release; 800 } 801 802 /* 803 * Fill in mbuf with extended UDP header 804 * and addresses and length put into network format. 805 */ 806 ui = mtod(m, struct udpiphdr *); 807 ui->ui_pr = IPPROTO_UDP; 808 ui->ui_src = inp->inp_laddr; 809 ui->ui_dst = inp->inp_faddr; 810 ui->ui_sport = inp->inp_lport; 811 ui->ui_dport = inp->inp_fport; 812 ui->ui_ulen = htons((u_int16_t)len + sizeof(struct udphdr)); 813 814 ro = &inp->inp_route; 815 816 /* 817 * Set up checksum and output datagram. 818 */ 819 if (udpcksum) { 820 /* 821 * XXX Cache pseudo-header checksum part for 822 * XXX "connected" UDP sockets. 823 */ 824 ui->ui_sum = in_cksum_phdr(ui->ui_src.s_addr, 825 ui->ui_dst.s_addr, htons((u_int16_t)len + 826 sizeof(struct udphdr) + IPPROTO_UDP)); 827 m->m_pkthdr.csum_flags = M_CSUM_UDPv4; 828 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum); 829 } else 830 ui->ui_sum = 0; 831 ((struct ip *)ui)->ip_len = htons(sizeof (struct udpiphdr) + len); 832 ((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */ 833 ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */ 834 UDP_STATINC(UDP_STAT_OPACKETS); 835 836 return (ip_output(m, inp->inp_options, ro, 837 inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST), 838 inp->inp_moptions, inp->inp_socket)); 839 840 release: 841 m_freem(m); 842 return (error); 843 } 844 845 static int 846 udp_attach(struct socket *so, int proto) 847 { 848 struct inpcb *inp; 849 int error; 850 851 KASSERT(sotoinpcb(so) == NULL); 852 853 /* Assign the lock (must happen even if we will error out). */ 854 sosetlock(so); 855 856 #ifdef MBUFTRACE 857 so->so_mowner = &udp_mowner; 858 so->so_rcv.sb_mowner = &udp_rx_mowner; 859 so->so_snd.sb_mowner = &udp_tx_mowner; 860 #endif 861 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 862 error = soreserve(so, udp_sendspace, udp_recvspace); 863 if (error) { 864 return error; 865 } 866 } 867 868 error = in_pcballoc(so, &udbtable); 869 if (error) { 870 return error; 871 } 872 inp = sotoinpcb(so); 873 inp->inp_ip.ip_ttl = ip_defttl; 874 KASSERT(solocked(so)); 875 876 return error; 877 } 878 879 static void 880 udp_detach(struct socket *so) 881 { 882 struct inpcb *inp; 883 884 KASSERT(solocked(so)); 885 inp = sotoinpcb(so); 886 KASSERT(inp != NULL); 887 in_pcbdetach(inp); 888 } 889 890 static int 891 udp_accept(struct socket *so, struct sockaddr *nam) 892 { 893 KASSERT(solocked(so)); 894 895 panic("udp_accept"); 896 897 return EOPNOTSUPP; 898 } 899 900 static int 901 udp_bind(struct socket *so, struct sockaddr *nam, struct lwp *l) 902 { 903 struct inpcb *inp = sotoinpcb(so); 904 struct sockaddr_in *sin = (struct sockaddr_in *)nam; 905 int error = 0; 906 int s; 907 908 KASSERT(solocked(so)); 909 KASSERT(inp != NULL); 910 KASSERT(nam != NULL); 911 912 s = splsoftnet(); 913 error = in_pcbbind(inp, sin, l); 914 splx(s); 915 916 return error; 917 } 918 919 static int 920 udp_listen(struct socket *so, struct lwp *l) 921 { 922 KASSERT(solocked(so)); 923 924 return EOPNOTSUPP; 925 } 926 927 static int 928 udp_connect(struct socket *so, struct sockaddr *nam, struct lwp *l) 929 { 930 struct inpcb *inp = sotoinpcb(so); 931 int error = 0; 932 int s; 933 934 KASSERT(solocked(so)); 935 KASSERT(inp != NULL); 936 KASSERT(nam != NULL); 937 938 s = splsoftnet(); 939 error = in_pcbconnect(inp, (struct sockaddr_in *)nam, l); 940 if (! error) 941 soisconnected(so); 942 splx(s); 943 return error; 944 } 945 946 static int 947 udp_connect2(struct socket *so, struct socket *so2) 948 { 949 KASSERT(solocked(so)); 950 951 return EOPNOTSUPP; 952 } 953 954 static int 955 udp_disconnect(struct socket *so) 956 { 957 struct inpcb *inp = sotoinpcb(so); 958 int s; 959 960 KASSERT(solocked(so)); 961 KASSERT(inp != NULL); 962 963 s = splsoftnet(); 964 /*soisdisconnected(so);*/ 965 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 966 in_pcbdisconnect(inp); 967 inp->inp_laddr = zeroin_addr; /* XXX */ 968 in_pcbstate(inp, INP_BOUND); /* XXX */ 969 splx(s); 970 971 return 0; 972 } 973 974 static int 975 udp_shutdown(struct socket *so) 976 { 977 int s; 978 979 KASSERT(solocked(so)); 980 981 s = splsoftnet(); 982 socantsendmore(so); 983 splx(s); 984 985 return 0; 986 } 987 988 static int 989 udp_abort(struct socket *so) 990 { 991 KASSERT(solocked(so)); 992 993 panic("udp_abort"); 994 995 return EOPNOTSUPP; 996 } 997 998 static int 999 udp_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp) 1000 { 1001 return in_control(so, cmd, nam, ifp); 1002 } 1003 1004 static int 1005 udp_stat(struct socket *so, struct stat *ub) 1006 { 1007 KASSERT(solocked(so)); 1008 1009 /* stat: don't bother with a blocksize. */ 1010 return 0; 1011 } 1012 1013 static int 1014 udp_peeraddr(struct socket *so, struct sockaddr *nam) 1015 { 1016 int s; 1017 1018 KASSERT(solocked(so)); 1019 KASSERT(sotoinpcb(so) != NULL); 1020 KASSERT(nam != NULL); 1021 1022 s = splsoftnet(); 1023 in_setpeeraddr(sotoinpcb(so), (struct sockaddr_in *)nam); 1024 splx(s); 1025 1026 return 0; 1027 } 1028 1029 static int 1030 udp_sockaddr(struct socket *so, struct sockaddr *nam) 1031 { 1032 int s; 1033 1034 KASSERT(solocked(so)); 1035 KASSERT(sotoinpcb(so) != NULL); 1036 KASSERT(nam != NULL); 1037 1038 s = splsoftnet(); 1039 in_setsockaddr(sotoinpcb(so), (struct sockaddr_in *)nam); 1040 splx(s); 1041 1042 return 0; 1043 } 1044 1045 static int 1046 udp_rcvd(struct socket *so, int flags, struct lwp *l) 1047 { 1048 KASSERT(solocked(so)); 1049 1050 return EOPNOTSUPP; 1051 } 1052 1053 static int 1054 udp_recvoob(struct socket *so, struct mbuf *m, int flags) 1055 { 1056 KASSERT(solocked(so)); 1057 1058 return EOPNOTSUPP; 1059 } 1060 1061 static int 1062 udp_send(struct socket *so, struct mbuf *m, struct sockaddr *nam, 1063 struct mbuf *control, struct lwp *l) 1064 { 1065 struct inpcb *inp = sotoinpcb(so); 1066 int error = 0; 1067 struct in_addr laddr; /* XXX */ 1068 int s; 1069 1070 KASSERT(solocked(so)); 1071 KASSERT(inp != NULL); 1072 KASSERT(m != NULL); 1073 1074 if (control && control->m_len) { 1075 m_freem(control); 1076 m_freem(m); 1077 return EINVAL; 1078 } 1079 1080 memset(&laddr, 0, sizeof laddr); 1081 1082 s = splsoftnet(); 1083 if (nam) { 1084 laddr = inp->inp_laddr; /* XXX */ 1085 if ((so->so_state & SS_ISCONNECTED) != 0) { 1086 error = EISCONN; 1087 goto die; 1088 } 1089 error = in_pcbconnect(inp, (struct sockaddr_in *)nam, l); 1090 if (error) 1091 goto die; 1092 } else { 1093 if ((so->so_state & SS_ISCONNECTED) == 0) { 1094 error = ENOTCONN; 1095 goto die; 1096 } 1097 } 1098 error = udp_output(m, inp); 1099 m = NULL; 1100 if (nam) { 1101 in_pcbdisconnect(inp); 1102 inp->inp_laddr = laddr; /* XXX */ 1103 in_pcbstate(inp, INP_BOUND); /* XXX */ 1104 } 1105 die: 1106 if (m) 1107 m_freem(m); 1108 1109 splx(s); 1110 return error; 1111 } 1112 1113 static int 1114 udp_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control) 1115 { 1116 KASSERT(solocked(so)); 1117 1118 m_freem(m); 1119 m_freem(control); 1120 1121 return EOPNOTSUPP; 1122 } 1123 1124 static int 1125 udp_purgeif(struct socket *so, struct ifnet *ifp) 1126 { 1127 int s; 1128 1129 s = splsoftnet(); 1130 mutex_enter(softnet_lock); 1131 in_pcbpurgeif0(&udbtable, ifp); 1132 in_purgeif(ifp); 1133 in_pcbpurgeif(&udbtable, ifp); 1134 mutex_exit(softnet_lock); 1135 splx(s); 1136 1137 return 0; 1138 } 1139 1140 static int 1141 sysctl_net_inet_udp_stats(SYSCTLFN_ARGS) 1142 { 1143 1144 return (NETSTAT_SYSCTL(udpstat_percpu, UDP_NSTATS)); 1145 } 1146 1147 /* 1148 * Sysctl for udp variables. 1149 */ 1150 static void 1151 sysctl_net_inet_udp_setup(struct sysctllog **clog) 1152 { 1153 1154 sysctl_createv(clog, 0, NULL, NULL, 1155 CTLFLAG_PERMANENT, 1156 CTLTYPE_NODE, "inet", NULL, 1157 NULL, 0, NULL, 0, 1158 CTL_NET, PF_INET, CTL_EOL); 1159 sysctl_createv(clog, 0, NULL, NULL, 1160 CTLFLAG_PERMANENT, 1161 CTLTYPE_NODE, "udp", 1162 SYSCTL_DESCR("UDPv4 related settings"), 1163 NULL, 0, NULL, 0, 1164 CTL_NET, PF_INET, IPPROTO_UDP, CTL_EOL); 1165 1166 sysctl_createv(clog, 0, NULL, NULL, 1167 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1168 CTLTYPE_INT, "checksum", 1169 SYSCTL_DESCR("Compute UDP checksums"), 1170 NULL, 0, &udpcksum, 0, 1171 CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_CHECKSUM, 1172 CTL_EOL); 1173 sysctl_createv(clog, 0, NULL, NULL, 1174 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1175 CTLTYPE_INT, "sendspace", 1176 SYSCTL_DESCR("Default UDP send buffer size"), 1177 NULL, 0, &udp_sendspace, 0, 1178 CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_SENDSPACE, 1179 CTL_EOL); 1180 sysctl_createv(clog, 0, NULL, NULL, 1181 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1182 CTLTYPE_INT, "recvspace", 1183 SYSCTL_DESCR("Default UDP receive buffer size"), 1184 NULL, 0, &udp_recvspace, 0, 1185 CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_RECVSPACE, 1186 CTL_EOL); 1187 sysctl_createv(clog, 0, NULL, NULL, 1188 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1189 CTLTYPE_INT, "do_loopback_cksum", 1190 SYSCTL_DESCR("Perform UDP checksum on loopback"), 1191 NULL, 0, &udp_do_loopback_cksum, 0, 1192 CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_LOOPBACKCKSUM, 1193 CTL_EOL); 1194 sysctl_createv(clog, 0, NULL, NULL, 1195 CTLFLAG_PERMANENT, 1196 CTLTYPE_STRUCT, "pcblist", 1197 SYSCTL_DESCR("UDP protocol control block list"), 1198 sysctl_inpcblist, 0, &udbtable, 0, 1199 CTL_NET, PF_INET, IPPROTO_UDP, CTL_CREATE, 1200 CTL_EOL); 1201 sysctl_createv(clog, 0, NULL, NULL, 1202 CTLFLAG_PERMANENT, 1203 CTLTYPE_STRUCT, "stats", 1204 SYSCTL_DESCR("UDP statistics"), 1205 sysctl_net_inet_udp_stats, 0, NULL, 0, 1206 CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_STATS, 1207 CTL_EOL); 1208 } 1209 #endif 1210 1211 void 1212 udp_statinc(u_int stat) 1213 { 1214 1215 KASSERT(stat < UDP_NSTATS); 1216 UDP_STATINC(stat); 1217 } 1218 1219 #if defined(INET) && defined(IPSEC) 1220 /* 1221 * Returns: 1222 * 1 if the packet was processed 1223 * 0 if normal UDP processing should take place 1224 * -1 if an error occurent and m was freed 1225 */ 1226 static int 1227 udp4_espinudp(struct mbuf **mp, int off, struct sockaddr *src, 1228 struct socket *so) 1229 { 1230 size_t len; 1231 void *data; 1232 struct inpcb *inp; 1233 size_t skip = 0; 1234 size_t minlen; 1235 size_t iphdrlen; 1236 struct ip *ip; 1237 struct m_tag *tag; 1238 struct udphdr *udphdr; 1239 u_int16_t sport, dport; 1240 struct mbuf *m = *mp; 1241 1242 /* 1243 * Collapse the mbuf chain if the first mbuf is too short 1244 * The longest case is: UDP + non ESP marker + ESP 1245 */ 1246 minlen = off + sizeof(u_int64_t) + sizeof(struct esp); 1247 if (minlen > m->m_pkthdr.len) 1248 minlen = m->m_pkthdr.len; 1249 1250 if (m->m_len < minlen) { 1251 if ((*mp = m_pullup(m, minlen)) == NULL) { 1252 printf("udp4_espinudp: m_pullup failed\n"); 1253 return -1; 1254 } 1255 m = *mp; 1256 } 1257 1258 len = m->m_len - off; 1259 data = mtod(m, char *) + off; 1260 inp = sotoinpcb(so); 1261 1262 /* Ignore keepalive packets */ 1263 if ((len == 1) && (*(unsigned char *)data == 0xff)) { 1264 m_free(m); 1265 *mp = NULL; /* avoid any further processiong by caller ... */ 1266 return 1; 1267 } 1268 1269 /* 1270 * Check that the payload is long enough to hold 1271 * an ESP header and compute the length of encapsulation 1272 * header to remove 1273 */ 1274 if (inp->inp_flags & INP_ESPINUDP) { 1275 u_int32_t *st = (u_int32_t *)data; 1276 1277 if ((len <= sizeof(struct esp)) || (*st == 0)) 1278 return 0; /* Normal UDP processing */ 1279 1280 skip = sizeof(struct udphdr); 1281 } 1282 1283 if (inp->inp_flags & INP_ESPINUDP_NON_IKE) { 1284 u_int32_t *st = (u_int32_t *)data; 1285 1286 if ((len <= sizeof(u_int64_t) + sizeof(struct esp)) 1287 || ((st[0] | st[1]) != 0)) 1288 return 0; /* Normal UDP processing */ 1289 1290 skip = sizeof(struct udphdr) + sizeof(u_int64_t); 1291 } 1292 1293 /* 1294 * Get the UDP ports. They are handled in network 1295 * order everywhere in IPSEC_NAT_T code. 1296 */ 1297 udphdr = (struct udphdr *)((char *)data - skip); 1298 sport = udphdr->uh_sport; 1299 dport = udphdr->uh_dport; 1300 1301 /* 1302 * Remove the UDP header (and possibly the non ESP marker) 1303 * IP header lendth is iphdrlen 1304 * Before: 1305 * <--- off ---> 1306 * +----+------+-----+ 1307 * | IP | UDP | ESP | 1308 * +----+------+-----+ 1309 * <-skip-> 1310 * After: 1311 * +----+-----+ 1312 * | IP | ESP | 1313 * +----+-----+ 1314 * <-skip-> 1315 */ 1316 iphdrlen = off - sizeof(struct udphdr); 1317 memmove(mtod(m, char *) + skip, mtod(m, void *), iphdrlen); 1318 m_adj(m, skip); 1319 1320 ip = mtod(m, struct ip *); 1321 ip->ip_len = htons(ntohs(ip->ip_len) - skip); 1322 ip->ip_p = IPPROTO_ESP; 1323 1324 /* 1325 * We have modified the packet - it is now ESP, so we should not 1326 * return to UDP processing ... 1327 * 1328 * Add a PACKET_TAG_IPSEC_NAT_T_PORT tag to remember 1329 * the source UDP port. This is required if we want 1330 * to select the right SPD for multiple hosts behind 1331 * same NAT 1332 */ 1333 if ((tag = m_tag_get(PACKET_TAG_IPSEC_NAT_T_PORTS, 1334 sizeof(sport) + sizeof(dport), M_DONTWAIT)) == NULL) { 1335 printf("udp4_espinudp: m_tag_get failed\n"); 1336 m_freem(m); 1337 return -1; 1338 } 1339 ((u_int16_t *)(tag + 1))[0] = sport; 1340 ((u_int16_t *)(tag + 1))[1] = dport; 1341 m_tag_prepend(m, tag); 1342 1343 #ifdef IPSEC 1344 if (ipsec_used) 1345 ipsec4_common_input(m, iphdrlen, IPPROTO_ESP); 1346 /* XXX: else */ 1347 #else 1348 esp4_input(m, iphdrlen); 1349 #endif 1350 1351 /* We handled it, it shouldn't be handled by UDP */ 1352 *mp = NULL; /* avoid free by caller ... */ 1353 return 1; 1354 } 1355 #endif 1356 1357 PR_WRAP_USRREQS(udp) 1358 #define udp_attach udp_attach_wrapper 1359 #define udp_detach udp_detach_wrapper 1360 #define udp_accept udp_accept_wrapper 1361 #define udp_bind udp_bind_wrapper 1362 #define udp_listen udp_listen_wrapper 1363 #define udp_connect udp_connect_wrapper 1364 #define udp_connect2 udp_connect2_wrapper 1365 #define udp_disconnect udp_disconnect_wrapper 1366 #define udp_shutdown udp_shutdown_wrapper 1367 #define udp_abort udp_abort_wrapper 1368 #define udp_ioctl udp_ioctl_wrapper 1369 #define udp_stat udp_stat_wrapper 1370 #define udp_peeraddr udp_peeraddr_wrapper 1371 #define udp_sockaddr udp_sockaddr_wrapper 1372 #define udp_rcvd udp_rcvd_wrapper 1373 #define udp_recvoob udp_recvoob_wrapper 1374 #define udp_send udp_send_wrapper 1375 #define udp_sendoob udp_sendoob_wrapper 1376 #define udp_purgeif udp_purgeif_wrapper 1377 1378 const struct pr_usrreqs udp_usrreqs = { 1379 .pr_attach = udp_attach, 1380 .pr_detach = udp_detach, 1381 .pr_accept = udp_accept, 1382 .pr_bind = udp_bind, 1383 .pr_listen = udp_listen, 1384 .pr_connect = udp_connect, 1385 .pr_connect2 = udp_connect2, 1386 .pr_disconnect = udp_disconnect, 1387 .pr_shutdown = udp_shutdown, 1388 .pr_abort = udp_abort, 1389 .pr_ioctl = udp_ioctl, 1390 .pr_stat = udp_stat, 1391 .pr_peeraddr = udp_peeraddr, 1392 .pr_sockaddr = udp_sockaddr, 1393 .pr_rcvd = udp_rcvd, 1394 .pr_recvoob = udp_recvoob, 1395 .pr_send = udp_send, 1396 .pr_sendoob = udp_sendoob, 1397 .pr_purgeif = udp_purgeif, 1398 }; 1399