1 /* $NetBSD: udp_usrreq.c,v 1.226 2016/06/10 13:31:44 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 1.226 2016/06/10 13:31:44 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 #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/ipsec_private.h> 123 #include <netipsec/esp.h> 124 #ifdef INET6 125 #include <netipsec/ipsec6.h> 126 #endif 127 #endif /* IPSEC */ 128 129 #ifdef COMPAT_50 130 #include <compat/sys/socket.h> 131 #endif 132 133 #ifdef IPKDB 134 #include <ipkdb/ipkdb.h> 135 #endif 136 137 int udpcksum = 1; 138 int udp_do_loopback_cksum = 0; 139 140 struct inpcbtable udbtable; 141 142 percpu_t *udpstat_percpu; 143 144 #ifdef INET 145 #ifdef IPSEC 146 static int udp4_espinudp (struct mbuf **, int, struct sockaddr *, 147 struct socket *); 148 #endif 149 static void udp4_sendup (struct mbuf *, int, struct sockaddr *, 150 struct socket *); 151 static int udp4_realinput (struct sockaddr_in *, struct sockaddr_in *, 152 struct mbuf **, int); 153 static int udp4_input_checksum(struct mbuf *, const struct udphdr *, int, int); 154 #endif 155 #ifdef INET 156 static void udp_notify (struct inpcb *, int); 157 #endif 158 159 #ifndef UDBHASHSIZE 160 #define UDBHASHSIZE 128 161 #endif 162 int udbhashsize = UDBHASHSIZE; 163 164 /* 165 * For send - really max datagram size; for receive - 40 1K datagrams. 166 */ 167 static int udp_sendspace = 9216; 168 static int udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in)); 169 170 #ifdef MBUFTRACE 171 struct mowner udp_mowner = MOWNER_INIT("udp", ""); 172 struct mowner udp_rx_mowner = MOWNER_INIT("udp", "rx"); 173 struct mowner udp_tx_mowner = MOWNER_INIT("udp", "tx"); 174 #endif 175 176 #ifdef UDP_CSUM_COUNTERS 177 #include <sys/device.h> 178 179 #if defined(INET) 180 struct evcnt udp_hwcsum_bad = EVCNT_INITIALIZER(EVCNT_TYPE_MISC, 181 NULL, "udp", "hwcsum bad"); 182 struct evcnt udp_hwcsum_ok = EVCNT_INITIALIZER(EVCNT_TYPE_MISC, 183 NULL, "udp", "hwcsum ok"); 184 struct evcnt udp_hwcsum_data = EVCNT_INITIALIZER(EVCNT_TYPE_MISC, 185 NULL, "udp", "hwcsum data"); 186 struct evcnt udp_swcsum = EVCNT_INITIALIZER(EVCNT_TYPE_MISC, 187 NULL, "udp", "swcsum"); 188 189 EVCNT_ATTACH_STATIC(udp_hwcsum_bad); 190 EVCNT_ATTACH_STATIC(udp_hwcsum_ok); 191 EVCNT_ATTACH_STATIC(udp_hwcsum_data); 192 EVCNT_ATTACH_STATIC(udp_swcsum); 193 #endif /* defined(INET) */ 194 195 #define UDP_CSUM_COUNTER_INCR(ev) (ev)->ev_count++ 196 #else 197 #define UDP_CSUM_COUNTER_INCR(ev) /* nothing */ 198 #endif /* UDP_CSUM_COUNTERS */ 199 200 static void sysctl_net_inet_udp_setup(struct sysctllog **); 201 202 static int 203 do_udpinit(void) 204 { 205 206 in_pcbinit(&udbtable, udbhashsize, udbhashsize); 207 udpstat_percpu = percpu_alloc(sizeof(uint64_t) * UDP_NSTATS); 208 209 MOWNER_ATTACH(&udp_tx_mowner); 210 MOWNER_ATTACH(&udp_rx_mowner); 211 MOWNER_ATTACH(&udp_mowner); 212 213 return 0; 214 } 215 216 void 217 udp_init_common(void) 218 { 219 static ONCE_DECL(doudpinit); 220 221 RUN_ONCE(&doudpinit, do_udpinit); 222 } 223 224 void 225 udp_init(void) 226 { 227 228 sysctl_net_inet_udp_setup(NULL); 229 230 udp_init_common(); 231 } 232 233 /* 234 * Checksum extended UDP header and data. 235 */ 236 237 int 238 udp_input_checksum(int af, struct mbuf *m, const struct udphdr *uh, 239 int iphlen, int len) 240 { 241 242 switch (af) { 243 #ifdef INET 244 case AF_INET: 245 return udp4_input_checksum(m, uh, iphlen, len); 246 #endif 247 #ifdef INET6 248 case AF_INET6: 249 return udp6_input_checksum(m, uh, iphlen, len); 250 #endif 251 } 252 #ifdef DIAGNOSTIC 253 panic("udp_input_checksum: unknown af %d", af); 254 #endif 255 /* NOTREACHED */ 256 return -1; 257 } 258 259 #ifdef INET 260 261 /* 262 * Checksum extended UDP header and data. 263 */ 264 265 static int 266 udp4_input_checksum(struct mbuf *m, const struct udphdr *uh, 267 int iphlen, int len) 268 { 269 270 /* 271 * XXX it's better to record and check if this mbuf is 272 * already checked. 273 */ 274 275 if (uh->uh_sum == 0) 276 return 0; 277 278 switch (m->m_pkthdr.csum_flags & 279 ((m_get_rcvif_NOMPSAFE(m)->if_csum_flags_rx & M_CSUM_UDPv4) | 280 M_CSUM_TCP_UDP_BAD | M_CSUM_DATA)) { 281 case M_CSUM_UDPv4|M_CSUM_TCP_UDP_BAD: 282 UDP_CSUM_COUNTER_INCR(&udp_hwcsum_bad); 283 goto badcsum; 284 285 case M_CSUM_UDPv4|M_CSUM_DATA: { 286 u_int32_t hw_csum = m->m_pkthdr.csum_data; 287 288 UDP_CSUM_COUNTER_INCR(&udp_hwcsum_data); 289 if (m->m_pkthdr.csum_flags & M_CSUM_NO_PSEUDOHDR) { 290 const struct ip *ip = 291 mtod(m, const struct ip *); 292 293 hw_csum = in_cksum_phdr(ip->ip_src.s_addr, 294 ip->ip_dst.s_addr, 295 htons(hw_csum + len + IPPROTO_UDP)); 296 } 297 if ((hw_csum ^ 0xffff) != 0) 298 goto badcsum; 299 break; 300 } 301 302 case M_CSUM_UDPv4: 303 /* Checksum was okay. */ 304 UDP_CSUM_COUNTER_INCR(&udp_hwcsum_ok); 305 break; 306 307 default: 308 /* 309 * Need to compute it ourselves. Maybe skip checksum 310 * on loopback interfaces. 311 */ 312 if (__predict_true(!(m_get_rcvif_NOMPSAFE(m)->if_flags & 313 IFF_LOOPBACK) || 314 udp_do_loopback_cksum)) { 315 UDP_CSUM_COUNTER_INCR(&udp_swcsum); 316 if (in4_cksum(m, IPPROTO_UDP, iphlen, len) != 0) 317 goto badcsum; 318 } 319 break; 320 } 321 322 return 0; 323 324 badcsum: 325 UDP_STATINC(UDP_STAT_BADSUM); 326 return -1; 327 } 328 329 void 330 udp_input(struct mbuf *m, ...) 331 { 332 va_list ap; 333 struct sockaddr_in src, dst; 334 struct ip *ip; 335 struct udphdr *uh; 336 int iphlen; 337 int len; 338 int n; 339 u_int16_t ip_len; 340 341 va_start(ap, m); 342 iphlen = va_arg(ap, int); 343 (void)va_arg(ap, int); /* ignore value, advance ap */ 344 va_end(ap); 345 346 MCLAIM(m, &udp_rx_mowner); 347 UDP_STATINC(UDP_STAT_IPACKETS); 348 349 /* 350 * Get IP and UDP header together in first mbuf. 351 */ 352 ip = mtod(m, struct ip *); 353 IP6_EXTHDR_GET(uh, struct udphdr *, m, iphlen, sizeof(struct udphdr)); 354 if (uh == NULL) { 355 UDP_STATINC(UDP_STAT_HDROPS); 356 return; 357 } 358 KASSERT(UDP_HDR_ALIGNED_P(uh)); 359 360 /* destination port of 0 is illegal, based on RFC768. */ 361 if (uh->uh_dport == 0) 362 goto bad; 363 364 /* 365 * Make mbuf data length reflect UDP length. 366 * If not enough data to reflect UDP length, drop. 367 */ 368 ip_len = ntohs(ip->ip_len); 369 len = ntohs((u_int16_t)uh->uh_ulen); 370 if (ip_len != iphlen + len) { 371 if (ip_len < iphlen + len || len < sizeof(struct udphdr)) { 372 UDP_STATINC(UDP_STAT_BADLEN); 373 goto bad; 374 } 375 m_adj(m, iphlen + len - ip_len); 376 } 377 378 /* 379 * Checksum extended UDP header and data. 380 */ 381 if (udp4_input_checksum(m, uh, iphlen, len)) 382 goto badcsum; 383 384 /* construct source and dst sockaddrs. */ 385 sockaddr_in_init(&src, &ip->ip_src, uh->uh_sport); 386 sockaddr_in_init(&dst, &ip->ip_dst, uh->uh_dport); 387 388 if ((n = udp4_realinput(&src, &dst, &m, iphlen)) == -1) { 389 UDP_STATINC(UDP_STAT_HDROPS); 390 return; 391 } 392 if (m == NULL) { 393 /* 394 * packet has been processed by ESP stuff - 395 * e.g. dropped NAT-T-keep-alive-packet ... 396 */ 397 return; 398 } 399 ip = mtod(m, struct ip *); 400 #ifdef INET6 401 if (IN_MULTICAST(ip->ip_dst.s_addr) || n == 0) { 402 struct sockaddr_in6 src6, dst6; 403 404 memset(&src6, 0, sizeof(src6)); 405 src6.sin6_family = AF_INET6; 406 src6.sin6_len = sizeof(struct sockaddr_in6); 407 in6_in_2_v4mapin6(&ip->ip_src, &src6.sin6_addr); 408 src6.sin6_port = uh->uh_sport; 409 memset(&dst6, 0, sizeof(dst6)); 410 dst6.sin6_family = AF_INET6; 411 dst6.sin6_len = sizeof(struct sockaddr_in6); 412 in6_in_2_v4mapin6(&ip->ip_dst, &dst6.sin6_addr); 413 dst6.sin6_port = uh->uh_dport; 414 415 n += udp6_realinput(AF_INET, &src6, &dst6, m, iphlen); 416 } 417 #endif 418 419 if (n == 0) { 420 if (m->m_flags & (M_BCAST | M_MCAST)) { 421 UDP_STATINC(UDP_STAT_NOPORTBCAST); 422 goto bad; 423 } 424 UDP_STATINC(UDP_STAT_NOPORT); 425 #ifdef IPKDB 426 if (checkipkdb(&ip->ip_src, uh->uh_sport, uh->uh_dport, 427 m, iphlen + sizeof(struct udphdr), 428 m->m_pkthdr.len - iphlen - sizeof(struct udphdr))) { 429 /* 430 * It was a debugger connect packet, 431 * just drop it now 432 */ 433 goto bad; 434 } 435 #endif 436 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0); 437 m = NULL; 438 } 439 440 bad: 441 if (m) 442 m_freem(m); 443 return; 444 445 badcsum: 446 m_freem(m); 447 } 448 #endif 449 450 #ifdef INET 451 static void 452 udp4_sendup(struct mbuf *m, int off /* offset of data portion */, 453 struct sockaddr *src, struct socket *so) 454 { 455 struct mbuf *opts = NULL; 456 struct mbuf *n; 457 struct inpcb *inp = NULL; 458 459 if (!so) 460 return; 461 switch (so->so_proto->pr_domain->dom_family) { 462 case AF_INET: 463 inp = sotoinpcb(so); 464 break; 465 #ifdef INET6 466 case AF_INET6: 467 break; 468 #endif 469 default: 470 return; 471 } 472 473 #if defined(IPSEC) 474 /* check AH/ESP integrity. */ 475 if (ipsec_used && so != NULL && ipsec4_in_reject_so(m, so)) { 476 IPSEC_STATINC(IPSEC_STAT_IN_POLVIO); 477 if ((n = m_copypacket(m, M_DONTWAIT)) != NULL) 478 icmp_error(n, ICMP_UNREACH, ICMP_UNREACH_ADMIN_PROHIBIT, 479 0, 0); 480 return; 481 } 482 #endif /*IPSEC*/ 483 484 if ((n = m_copypacket(m, M_DONTWAIT)) != NULL) { 485 if (inp && (inp->inp_flags & INP_CONTROLOPTS 486 #ifdef SO_OTIMESTAMP 487 || so->so_options & SO_OTIMESTAMP 488 #endif 489 || so->so_options & SO_TIMESTAMP)) { 490 struct ip *ip = mtod(n, struct ip *); 491 ip_savecontrol(inp, &opts, ip, n); 492 } 493 494 m_adj(n, off); 495 if (sbappendaddr(&so->so_rcv, src, n, 496 opts) == 0) { 497 m_freem(n); 498 if (opts) 499 m_freem(opts); 500 so->so_rcv.sb_overflowed++; 501 UDP_STATINC(UDP_STAT_FULLSOCK); 502 } else 503 sorwakeup(so); 504 } 505 } 506 #endif 507 508 #ifdef INET 509 static int 510 udp4_realinput(struct sockaddr_in *src, struct sockaddr_in *dst, 511 struct mbuf **mp, int off /* offset of udphdr */) 512 { 513 u_int16_t *sport, *dport; 514 int rcvcnt; 515 struct in_addr *src4, *dst4; 516 struct inpcb_hdr *inph; 517 struct inpcb *inp; 518 struct mbuf *m = *mp; 519 520 rcvcnt = 0; 521 off += sizeof(struct udphdr); /* now, offset of payload */ 522 523 if (src->sin_family != AF_INET || dst->sin_family != AF_INET) 524 goto bad; 525 526 src4 = &src->sin_addr; 527 sport = &src->sin_port; 528 dst4 = &dst->sin_addr; 529 dport = &dst->sin_port; 530 531 if (IN_MULTICAST(dst4->s_addr) || 532 in_broadcast(*dst4, m_get_rcvif_NOMPSAFE(m))) { 533 /* 534 * Deliver a multicast or broadcast datagram to *all* sockets 535 * for which the local and remote addresses and ports match 536 * those of the incoming datagram. This allows more than 537 * one process to receive multi/broadcasts on the same port. 538 * (This really ought to be done for unicast datagrams as 539 * well, but that would cause problems with existing 540 * applications that open both address-specific sockets and 541 * a wildcard socket listening to the same port -- they would 542 * end up receiving duplicates of every unicast datagram. 543 * Those applications open the multiple sockets to overcome an 544 * inadequacy of the UDP socket interface, but for backwards 545 * compatibility we avoid the problem here rather than 546 * fixing the interface. Maybe 4.5BSD will remedy this?) 547 */ 548 549 /* 550 * KAME note: traditionally we dropped udpiphdr from mbuf here. 551 * we need udpiphdr for IPsec processing so we do that later. 552 */ 553 /* 554 * Locate pcb(s) for datagram. 555 */ 556 TAILQ_FOREACH(inph, &udbtable.inpt_queue, inph_queue) { 557 inp = (struct inpcb *)inph; 558 if (inp->inp_af != AF_INET) 559 continue; 560 561 if (inp->inp_lport != *dport) 562 continue; 563 if (!in_nullhost(inp->inp_laddr)) { 564 if (!in_hosteq(inp->inp_laddr, *dst4)) 565 continue; 566 } 567 if (!in_nullhost(inp->inp_faddr)) { 568 if (!in_hosteq(inp->inp_faddr, *src4) || 569 inp->inp_fport != *sport) 570 continue; 571 } 572 573 udp4_sendup(m, off, (struct sockaddr *)src, 574 inp->inp_socket); 575 rcvcnt++; 576 577 /* 578 * Don't look for additional matches if this one does 579 * not have either the SO_REUSEPORT or SO_REUSEADDR 580 * socket options set. This heuristic avoids searching 581 * through all pcbs in the common case of a non-shared 582 * port. It assumes that an application will never 583 * clear these options after setting them. 584 */ 585 if ((inp->inp_socket->so_options & 586 (SO_REUSEPORT|SO_REUSEADDR)) == 0) 587 break; 588 } 589 } else { 590 /* 591 * Locate pcb for datagram. 592 */ 593 inp = in_pcblookup_connect(&udbtable, *src4, *sport, *dst4, 594 *dport, 0); 595 if (inp == 0) { 596 UDP_STATINC(UDP_STAT_PCBHASHMISS); 597 inp = in_pcblookup_bind(&udbtable, *dst4, *dport); 598 if (inp == 0) 599 return rcvcnt; 600 } 601 602 #ifdef IPSEC 603 /* Handle ESP over UDP */ 604 if (inp->inp_flags & INP_ESPINUDP_ALL) { 605 struct sockaddr *sa = (struct sockaddr *)src; 606 607 switch(udp4_espinudp(mp, off, sa, inp->inp_socket)) { 608 case -1: /* Error, m was freeed */ 609 rcvcnt = -1; 610 goto bad; 611 break; 612 613 case 1: /* ESP over UDP */ 614 rcvcnt++; 615 goto bad; 616 break; 617 618 case 0: /* plain UDP */ 619 default: /* Unexpected */ 620 /* 621 * Normal UDP processing will take place 622 * m may have changed. 623 */ 624 m = *mp; 625 break; 626 } 627 } 628 #endif 629 630 /* 631 * Check the minimum TTL for socket. 632 */ 633 if (mtod(m, struct ip *)->ip_ttl < inp->inp_ip_minttl) 634 goto bad; 635 636 udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket); 637 rcvcnt++; 638 } 639 640 bad: 641 return rcvcnt; 642 } 643 #endif 644 645 #ifdef INET 646 /* 647 * Notify a udp user of an asynchronous error; 648 * just wake up so that he can collect error status. 649 */ 650 static void 651 udp_notify(struct inpcb *inp, int errno) 652 { 653 inp->inp_socket->so_error = errno; 654 sorwakeup(inp->inp_socket); 655 sowwakeup(inp->inp_socket); 656 } 657 658 void * 659 udp_ctlinput(int cmd, const struct sockaddr *sa, void *v) 660 { 661 struct ip *ip = v; 662 struct udphdr *uh; 663 void (*notify)(struct inpcb *, int) = udp_notify; 664 int errno; 665 666 if (sa->sa_family != AF_INET 667 || sa->sa_len != sizeof(struct sockaddr_in)) 668 return NULL; 669 if ((unsigned)cmd >= PRC_NCMDS) 670 return NULL; 671 errno = inetctlerrmap[cmd]; 672 if (PRC_IS_REDIRECT(cmd)) 673 notify = in_rtchange, ip = 0; 674 else if (cmd == PRC_HOSTDEAD) 675 ip = 0; 676 else if (errno == 0) 677 return NULL; 678 if (ip) { 679 uh = (struct udphdr *)((char *)ip + (ip->ip_hl << 2)); 680 in_pcbnotify(&udbtable, satocsin(sa)->sin_addr, uh->uh_dport, 681 ip->ip_src, uh->uh_sport, errno, notify); 682 683 /* XXX mapped address case */ 684 } else 685 in_pcbnotifyall(&udbtable, satocsin(sa)->sin_addr, errno, 686 notify); 687 return NULL; 688 } 689 690 int 691 udp_ctloutput(int op, struct socket *so, struct sockopt *sopt) 692 { 693 int s; 694 int error = 0; 695 struct inpcb *inp; 696 int family; 697 int optval; 698 699 family = so->so_proto->pr_domain->dom_family; 700 701 s = splsoftnet(); 702 switch (family) { 703 #ifdef INET 704 case PF_INET: 705 if (sopt->sopt_level != IPPROTO_UDP) { 706 error = ip_ctloutput(op, so, sopt); 707 goto end; 708 } 709 break; 710 #endif 711 #ifdef INET6 712 case PF_INET6: 713 if (sopt->sopt_level != IPPROTO_UDP) { 714 error = ip6_ctloutput(op, so, sopt); 715 goto end; 716 } 717 break; 718 #endif 719 default: 720 error = EAFNOSUPPORT; 721 goto end; 722 } 723 724 725 switch (op) { 726 case PRCO_SETOPT: 727 inp = sotoinpcb(so); 728 729 switch (sopt->sopt_name) { 730 case UDP_ENCAP: 731 error = sockopt_getint(sopt, &optval); 732 if (error) 733 break; 734 735 switch(optval) { 736 case 0: 737 inp->inp_flags &= ~INP_ESPINUDP_ALL; 738 break; 739 740 case UDP_ENCAP_ESPINUDP: 741 inp->inp_flags &= ~INP_ESPINUDP_ALL; 742 inp->inp_flags |= INP_ESPINUDP; 743 break; 744 745 case UDP_ENCAP_ESPINUDP_NON_IKE: 746 inp->inp_flags &= ~INP_ESPINUDP_ALL; 747 inp->inp_flags |= INP_ESPINUDP_NON_IKE; 748 break; 749 default: 750 error = EINVAL; 751 break; 752 } 753 break; 754 755 default: 756 error = ENOPROTOOPT; 757 break; 758 } 759 break; 760 761 default: 762 error = EINVAL; 763 break; 764 } 765 766 end: 767 splx(s); 768 return error; 769 } 770 771 772 int 773 udp_output(struct mbuf *m, struct inpcb *inp) 774 { 775 struct udpiphdr *ui; 776 struct route *ro; 777 int len = m->m_pkthdr.len; 778 int error = 0; 779 780 MCLAIM(m, &udp_tx_mowner); 781 782 /* 783 * Calculate data length and get a mbuf 784 * for UDP and IP headers. 785 */ 786 M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT); 787 if (m == 0) { 788 error = ENOBUFS; 789 goto release; 790 } 791 792 /* 793 * Compute the packet length of the IP header, and 794 * punt if the length looks bogus. 795 */ 796 if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) { 797 error = EMSGSIZE; 798 goto release; 799 } 800 801 /* 802 * Fill in mbuf with extended UDP header 803 * and addresses and length put into network format. 804 */ 805 ui = mtod(m, struct udpiphdr *); 806 ui->ui_pr = IPPROTO_UDP; 807 ui->ui_src = inp->inp_laddr; 808 ui->ui_dst = inp->inp_faddr; 809 ui->ui_sport = inp->inp_lport; 810 ui->ui_dport = inp->inp_fport; 811 ui->ui_ulen = htons((u_int16_t)len + sizeof(struct udphdr)); 812 813 ro = &inp->inp_route; 814 815 /* 816 * Set up checksum and output datagram. 817 */ 818 if (udpcksum) { 819 /* 820 * XXX Cache pseudo-header checksum part for 821 * XXX "connected" UDP sockets. 822 */ 823 ui->ui_sum = in_cksum_phdr(ui->ui_src.s_addr, 824 ui->ui_dst.s_addr, htons((u_int16_t)len + 825 sizeof(struct udphdr) + IPPROTO_UDP)); 826 m->m_pkthdr.csum_flags = M_CSUM_UDPv4; 827 m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum); 828 } else 829 ui->ui_sum = 0; 830 ((struct ip *)ui)->ip_len = htons(sizeof (struct udpiphdr) + len); 831 ((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */ 832 ((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */ 833 UDP_STATINC(UDP_STAT_OPACKETS); 834 835 return (ip_output(m, inp->inp_options, ro, 836 inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST), 837 inp->inp_moptions, inp->inp_socket)); 838 839 release: 840 m_freem(m); 841 return (error); 842 } 843 844 static int 845 udp_attach(struct socket *so, int proto) 846 { 847 struct inpcb *inp; 848 int error; 849 850 KASSERT(sotoinpcb(so) == NULL); 851 852 /* Assign the lock (must happen even if we will error out). */ 853 sosetlock(so); 854 855 #ifdef MBUFTRACE 856 so->so_mowner = &udp_mowner; 857 so->so_rcv.sb_mowner = &udp_rx_mowner; 858 so->so_snd.sb_mowner = &udp_tx_mowner; 859 #endif 860 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 861 error = soreserve(so, udp_sendspace, udp_recvspace); 862 if (error) { 863 return error; 864 } 865 } 866 867 error = in_pcballoc(so, &udbtable); 868 if (error) { 869 return error; 870 } 871 inp = sotoinpcb(so); 872 inp->inp_ip.ip_ttl = ip_defttl; 873 KASSERT(solocked(so)); 874 875 return error; 876 } 877 878 static void 879 udp_detach(struct socket *so) 880 { 881 struct inpcb *inp; 882 883 KASSERT(solocked(so)); 884 inp = sotoinpcb(so); 885 KASSERT(inp != NULL); 886 in_pcbdetach(inp); 887 } 888 889 static int 890 udp_accept(struct socket *so, struct sockaddr *nam) 891 { 892 KASSERT(solocked(so)); 893 894 panic("udp_accept"); 895 896 return EOPNOTSUPP; 897 } 898 899 static int 900 udp_bind(struct socket *so, struct sockaddr *nam, struct lwp *l) 901 { 902 struct inpcb *inp = sotoinpcb(so); 903 struct sockaddr_in *sin = (struct sockaddr_in *)nam; 904 int error = 0; 905 int s; 906 907 KASSERT(solocked(so)); 908 KASSERT(inp != NULL); 909 KASSERT(nam != NULL); 910 911 s = splsoftnet(); 912 error = in_pcbbind(inp, sin, l); 913 splx(s); 914 915 return error; 916 } 917 918 static int 919 udp_listen(struct socket *so, struct lwp *l) 920 { 921 KASSERT(solocked(so)); 922 923 return EOPNOTSUPP; 924 } 925 926 static int 927 udp_connect(struct socket *so, struct sockaddr *nam, struct lwp *l) 928 { 929 struct inpcb *inp = sotoinpcb(so); 930 int error = 0; 931 int s; 932 933 KASSERT(solocked(so)); 934 KASSERT(inp != NULL); 935 KASSERT(nam != NULL); 936 937 s = splsoftnet(); 938 error = in_pcbconnect(inp, (struct sockaddr_in *)nam, l); 939 if (! error) 940 soisconnected(so); 941 splx(s); 942 return error; 943 } 944 945 static int 946 udp_connect2(struct socket *so, struct socket *so2) 947 { 948 KASSERT(solocked(so)); 949 950 return EOPNOTSUPP; 951 } 952 953 static int 954 udp_disconnect(struct socket *so) 955 { 956 struct inpcb *inp = sotoinpcb(so); 957 int s; 958 959 KASSERT(solocked(so)); 960 KASSERT(inp != NULL); 961 962 s = splsoftnet(); 963 /*soisdisconnected(so);*/ 964 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 965 in_pcbdisconnect(inp); 966 inp->inp_laddr = zeroin_addr; /* XXX */ 967 in_pcbstate(inp, INP_BOUND); /* XXX */ 968 splx(s); 969 970 return 0; 971 } 972 973 static int 974 udp_shutdown(struct socket *so) 975 { 976 int s; 977 978 KASSERT(solocked(so)); 979 980 s = splsoftnet(); 981 socantsendmore(so); 982 splx(s); 983 984 return 0; 985 } 986 987 static int 988 udp_abort(struct socket *so) 989 { 990 KASSERT(solocked(so)); 991 992 panic("udp_abort"); 993 994 return EOPNOTSUPP; 995 } 996 997 static int 998 udp_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp) 999 { 1000 return in_control(so, cmd, nam, ifp); 1001 } 1002 1003 static int 1004 udp_stat(struct socket *so, struct stat *ub) 1005 { 1006 KASSERT(solocked(so)); 1007 1008 /* stat: don't bother with a blocksize. */ 1009 return 0; 1010 } 1011 1012 static int 1013 udp_peeraddr(struct socket *so, struct sockaddr *nam) 1014 { 1015 int s; 1016 1017 KASSERT(solocked(so)); 1018 KASSERT(sotoinpcb(so) != NULL); 1019 KASSERT(nam != NULL); 1020 1021 s = splsoftnet(); 1022 in_setpeeraddr(sotoinpcb(so), (struct sockaddr_in *)nam); 1023 splx(s); 1024 1025 return 0; 1026 } 1027 1028 static int 1029 udp_sockaddr(struct socket *so, struct sockaddr *nam) 1030 { 1031 int s; 1032 1033 KASSERT(solocked(so)); 1034 KASSERT(sotoinpcb(so) != NULL); 1035 KASSERT(nam != NULL); 1036 1037 s = splsoftnet(); 1038 in_setsockaddr(sotoinpcb(so), (struct sockaddr_in *)nam); 1039 splx(s); 1040 1041 return 0; 1042 } 1043 1044 static int 1045 udp_rcvd(struct socket *so, int flags, struct lwp *l) 1046 { 1047 KASSERT(solocked(so)); 1048 1049 return EOPNOTSUPP; 1050 } 1051 1052 static int 1053 udp_recvoob(struct socket *so, struct mbuf *m, int flags) 1054 { 1055 KASSERT(solocked(so)); 1056 1057 return EOPNOTSUPP; 1058 } 1059 1060 static int 1061 udp_send(struct socket *so, struct mbuf *m, struct sockaddr *nam, 1062 struct mbuf *control, struct lwp *l) 1063 { 1064 struct inpcb *inp = sotoinpcb(so); 1065 int error = 0; 1066 struct in_addr laddr; /* XXX */ 1067 int s; 1068 1069 KASSERT(solocked(so)); 1070 KASSERT(inp != NULL); 1071 KASSERT(m != NULL); 1072 1073 if (control && control->m_len) { 1074 m_freem(control); 1075 m_freem(m); 1076 return EINVAL; 1077 } 1078 1079 memset(&laddr, 0, sizeof laddr); 1080 1081 s = splsoftnet(); 1082 if (nam) { 1083 laddr = inp->inp_laddr; /* XXX */ 1084 if ((so->so_state & SS_ISCONNECTED) != 0) { 1085 error = EISCONN; 1086 goto die; 1087 } 1088 error = in_pcbconnect(inp, (struct sockaddr_in *)nam, l); 1089 if (error) 1090 goto die; 1091 } else { 1092 if ((so->so_state & SS_ISCONNECTED) == 0) { 1093 error = ENOTCONN; 1094 goto die; 1095 } 1096 } 1097 error = udp_output(m, inp); 1098 m = NULL; 1099 if (nam) { 1100 in_pcbdisconnect(inp); 1101 inp->inp_laddr = laddr; /* XXX */ 1102 in_pcbstate(inp, INP_BOUND); /* XXX */ 1103 } 1104 die: 1105 if (m) 1106 m_freem(m); 1107 1108 splx(s); 1109 return error; 1110 } 1111 1112 static int 1113 udp_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control) 1114 { 1115 KASSERT(solocked(so)); 1116 1117 m_freem(m); 1118 m_freem(control); 1119 1120 return EOPNOTSUPP; 1121 } 1122 1123 static int 1124 udp_purgeif(struct socket *so, struct ifnet *ifp) 1125 { 1126 int s; 1127 1128 s = splsoftnet(); 1129 mutex_enter(softnet_lock); 1130 in_pcbpurgeif0(&udbtable, ifp); 1131 in_purgeif(ifp); 1132 in_pcbpurgeif(&udbtable, ifp); 1133 mutex_exit(softnet_lock); 1134 splx(s); 1135 1136 return 0; 1137 } 1138 1139 static int 1140 sysctl_net_inet_udp_stats(SYSCTLFN_ARGS) 1141 { 1142 1143 return (NETSTAT_SYSCTL(udpstat_percpu, UDP_NSTATS)); 1144 } 1145 1146 /* 1147 * Sysctl for udp variables. 1148 */ 1149 static void 1150 sysctl_net_inet_udp_setup(struct sysctllog **clog) 1151 { 1152 1153 sysctl_createv(clog, 0, NULL, NULL, 1154 CTLFLAG_PERMANENT, 1155 CTLTYPE_NODE, "inet", NULL, 1156 NULL, 0, NULL, 0, 1157 CTL_NET, PF_INET, CTL_EOL); 1158 sysctl_createv(clog, 0, NULL, NULL, 1159 CTLFLAG_PERMANENT, 1160 CTLTYPE_NODE, "udp", 1161 SYSCTL_DESCR("UDPv4 related settings"), 1162 NULL, 0, NULL, 0, 1163 CTL_NET, PF_INET, IPPROTO_UDP, CTL_EOL); 1164 1165 sysctl_createv(clog, 0, NULL, NULL, 1166 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1167 CTLTYPE_INT, "checksum", 1168 SYSCTL_DESCR("Compute UDP checksums"), 1169 NULL, 0, &udpcksum, 0, 1170 CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_CHECKSUM, 1171 CTL_EOL); 1172 sysctl_createv(clog, 0, NULL, NULL, 1173 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1174 CTLTYPE_INT, "sendspace", 1175 SYSCTL_DESCR("Default UDP send buffer size"), 1176 NULL, 0, &udp_sendspace, 0, 1177 CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_SENDSPACE, 1178 CTL_EOL); 1179 sysctl_createv(clog, 0, NULL, NULL, 1180 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1181 CTLTYPE_INT, "recvspace", 1182 SYSCTL_DESCR("Default UDP receive buffer size"), 1183 NULL, 0, &udp_recvspace, 0, 1184 CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_RECVSPACE, 1185 CTL_EOL); 1186 sysctl_createv(clog, 0, NULL, NULL, 1187 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1188 CTLTYPE_INT, "do_loopback_cksum", 1189 SYSCTL_DESCR("Perform UDP checksum on loopback"), 1190 NULL, 0, &udp_do_loopback_cksum, 0, 1191 CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_LOOPBACKCKSUM, 1192 CTL_EOL); 1193 sysctl_createv(clog, 0, NULL, NULL, 1194 CTLFLAG_PERMANENT, 1195 CTLTYPE_STRUCT, "pcblist", 1196 SYSCTL_DESCR("UDP protocol control block list"), 1197 sysctl_inpcblist, 0, &udbtable, 0, 1198 CTL_NET, PF_INET, IPPROTO_UDP, CTL_CREATE, 1199 CTL_EOL); 1200 sysctl_createv(clog, 0, NULL, NULL, 1201 CTLFLAG_PERMANENT, 1202 CTLTYPE_STRUCT, "stats", 1203 SYSCTL_DESCR("UDP statistics"), 1204 sysctl_net_inet_udp_stats, 0, NULL, 0, 1205 CTL_NET, PF_INET, IPPROTO_UDP, UDPCTL_STATS, 1206 CTL_EOL); 1207 } 1208 #endif 1209 1210 void 1211 udp_statinc(u_int stat) 1212 { 1213 1214 KASSERT(stat < UDP_NSTATS); 1215 UDP_STATINC(stat); 1216 } 1217 1218 #if defined(INET) && defined(IPSEC) 1219 /* 1220 * Returns: 1221 * 1 if the packet was processed 1222 * 0 if normal UDP processing should take place 1223 * -1 if an error occurent and m was freed 1224 */ 1225 static int 1226 udp4_espinudp(struct mbuf **mp, int off, struct sockaddr *src, 1227 struct socket *so) 1228 { 1229 size_t len; 1230 void *data; 1231 struct inpcb *inp; 1232 size_t skip = 0; 1233 size_t minlen; 1234 size_t iphdrlen; 1235 struct ip *ip; 1236 struct m_tag *tag; 1237 struct udphdr *udphdr; 1238 u_int16_t sport, dport; 1239 struct mbuf *m = *mp; 1240 1241 /* 1242 * Collapse the mbuf chain if the first mbuf is too short 1243 * The longest case is: UDP + non ESP marker + ESP 1244 */ 1245 minlen = off + sizeof(u_int64_t) + sizeof(struct esp); 1246 if (minlen > m->m_pkthdr.len) 1247 minlen = m->m_pkthdr.len; 1248 1249 if (m->m_len < minlen) { 1250 if ((*mp = m_pullup(m, minlen)) == NULL) { 1251 printf("udp4_espinudp: m_pullup failed\n"); 1252 return -1; 1253 } 1254 m = *mp; 1255 } 1256 1257 len = m->m_len - off; 1258 data = mtod(m, char *) + off; 1259 inp = sotoinpcb(so); 1260 1261 /* Ignore keepalive packets */ 1262 if ((len == 1) && (*(unsigned char *)data == 0xff)) { 1263 m_free(m); 1264 *mp = NULL; /* avoid any further processiong by caller ... */ 1265 return 1; 1266 } 1267 1268 /* 1269 * Check that the payload is long enough to hold 1270 * an ESP header and compute the length of encapsulation 1271 * header to remove 1272 */ 1273 if (inp->inp_flags & INP_ESPINUDP) { 1274 u_int32_t *st = (u_int32_t *)data; 1275 1276 if ((len <= sizeof(struct esp)) || (*st == 0)) 1277 return 0; /* Normal UDP processing */ 1278 1279 skip = sizeof(struct udphdr); 1280 } 1281 1282 if (inp->inp_flags & INP_ESPINUDP_NON_IKE) { 1283 u_int32_t *st = (u_int32_t *)data; 1284 1285 if ((len <= sizeof(u_int64_t) + sizeof(struct esp)) 1286 || ((st[0] | st[1]) != 0)) 1287 return 0; /* Normal UDP processing */ 1288 1289 skip = sizeof(struct udphdr) + sizeof(u_int64_t); 1290 } 1291 1292 /* 1293 * Get the UDP ports. They are handled in network 1294 * order everywhere in IPSEC_NAT_T code. 1295 */ 1296 udphdr = (struct udphdr *)((char *)data - skip); 1297 sport = udphdr->uh_sport; 1298 dport = udphdr->uh_dport; 1299 1300 /* 1301 * Remove the UDP header (and possibly the non ESP marker) 1302 * IP header lendth is iphdrlen 1303 * Before: 1304 * <--- off ---> 1305 * +----+------+-----+ 1306 * | IP | UDP | ESP | 1307 * +----+------+-----+ 1308 * <-skip-> 1309 * After: 1310 * +----+-----+ 1311 * | IP | ESP | 1312 * +----+-----+ 1313 * <-skip-> 1314 */ 1315 iphdrlen = off - sizeof(struct udphdr); 1316 memmove(mtod(m, char *) + skip, mtod(m, void *), iphdrlen); 1317 m_adj(m, skip); 1318 1319 ip = mtod(m, struct ip *); 1320 ip->ip_len = htons(ntohs(ip->ip_len) - skip); 1321 ip->ip_p = IPPROTO_ESP; 1322 1323 /* 1324 * We have modified the packet - it is now ESP, so we should not 1325 * return to UDP processing ... 1326 * 1327 * Add a PACKET_TAG_IPSEC_NAT_T_PORT tag to remember 1328 * the source UDP port. This is required if we want 1329 * to select the right SPD for multiple hosts behind 1330 * same NAT 1331 */ 1332 if ((tag = m_tag_get(PACKET_TAG_IPSEC_NAT_T_PORTS, 1333 sizeof(sport) + sizeof(dport), M_DONTWAIT)) == NULL) { 1334 printf("udp4_espinudp: m_tag_get failed\n"); 1335 m_freem(m); 1336 return -1; 1337 } 1338 ((u_int16_t *)(tag + 1))[0] = sport; 1339 ((u_int16_t *)(tag + 1))[1] = dport; 1340 m_tag_prepend(m, tag); 1341 1342 #ifdef IPSEC 1343 if (ipsec_used) 1344 ipsec4_common_input(m, iphdrlen, IPPROTO_ESP); 1345 /* XXX: else */ 1346 #else 1347 esp4_input(m, iphdrlen); 1348 #endif 1349 1350 /* We handled it, it shouldn't be handled by UDP */ 1351 *mp = NULL; /* avoid free by caller ... */ 1352 return 1; 1353 } 1354 #endif 1355 1356 PR_WRAP_USRREQS(udp) 1357 #define udp_attach udp_attach_wrapper 1358 #define udp_detach udp_detach_wrapper 1359 #define udp_accept udp_accept_wrapper 1360 #define udp_bind udp_bind_wrapper 1361 #define udp_listen udp_listen_wrapper 1362 #define udp_connect udp_connect_wrapper 1363 #define udp_connect2 udp_connect2_wrapper 1364 #define udp_disconnect udp_disconnect_wrapper 1365 #define udp_shutdown udp_shutdown_wrapper 1366 #define udp_abort udp_abort_wrapper 1367 #define udp_ioctl udp_ioctl_wrapper 1368 #define udp_stat udp_stat_wrapper 1369 #define udp_peeraddr udp_peeraddr_wrapper 1370 #define udp_sockaddr udp_sockaddr_wrapper 1371 #define udp_rcvd udp_rcvd_wrapper 1372 #define udp_recvoob udp_recvoob_wrapper 1373 #define udp_send udp_send_wrapper 1374 #define udp_sendoob udp_sendoob_wrapper 1375 #define udp_purgeif udp_purgeif_wrapper 1376 1377 const struct pr_usrreqs udp_usrreqs = { 1378 .pr_attach = udp_attach, 1379 .pr_detach = udp_detach, 1380 .pr_accept = udp_accept, 1381 .pr_bind = udp_bind, 1382 .pr_listen = udp_listen, 1383 .pr_connect = udp_connect, 1384 .pr_connect2 = udp_connect2, 1385 .pr_disconnect = udp_disconnect, 1386 .pr_shutdown = udp_shutdown, 1387 .pr_abort = udp_abort, 1388 .pr_ioctl = udp_ioctl, 1389 .pr_stat = udp_stat, 1390 .pr_peeraddr = udp_peeraddr, 1391 .pr_sockaddr = udp_sockaddr, 1392 .pr_rcvd = udp_rcvd, 1393 .pr_recvoob = udp_recvoob, 1394 .pr_send = udp_send, 1395 .pr_sendoob = udp_sendoob, 1396 .pr_purgeif = udp_purgeif, 1397 }; 1398