1 /* 2 * Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95 34 * $Id: udp_usrreq.c,v 1.48 1998/08/24 07:47:39 dfr Exp $ 35 */ 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/kernel.h> 40 #include <sys/malloc.h> 41 #include <sys/mbuf.h> 42 #include <sys/protosw.h> 43 #include <sys/socket.h> 44 #include <sys/socketvar.h> 45 #include <sys/sysctl.h> 46 #include <sys/syslog.h> 47 48 #include <vm/vm_zone.h> 49 50 #include <net/if.h> 51 #include <net/route.h> 52 53 #include <netinet/in.h> 54 #include <netinet/in_systm.h> 55 #include <netinet/ip.h> 56 #include <netinet/in_pcb.h> 57 #include <netinet/in_var.h> 58 #include <netinet/ip_var.h> 59 #include <netinet/ip_icmp.h> 60 #include <netinet/icmp_var.h> 61 #include <netinet/udp.h> 62 #include <netinet/udp_var.h> 63 64 /* 65 * UDP protocol implementation. 66 * Per RFC 768, August, 1980. 67 */ 68 #ifndef COMPAT_42 69 static int udpcksum = 1; 70 #else 71 static int udpcksum = 0; /* XXX */ 72 #endif 73 SYSCTL_INT(_net_inet_udp, UDPCTL_CHECKSUM, checksum, CTLFLAG_RW, 74 &udpcksum, 0, ""); 75 76 static int log_in_vain = 0; 77 SYSCTL_INT(_net_inet_udp, OID_AUTO, log_in_vain, CTLFLAG_RW, 78 &log_in_vain, 0, ""); 79 80 static struct inpcbhead udb; /* from udp_var.h */ 81 static struct inpcbinfo udbinfo; 82 83 #ifndef UDBHASHSIZE 84 #define UDBHASHSIZE 16 85 #endif 86 87 static struct udpstat udpstat; /* from udp_var.h */ 88 SYSCTL_STRUCT(_net_inet_udp, UDPCTL_STATS, stats, CTLFLAG_RD, 89 &udpstat, udpstat, ""); 90 91 static struct sockaddr_in udp_in = { sizeof(udp_in), AF_INET }; 92 93 static int udp_output __P((struct inpcb *, struct mbuf *, struct sockaddr *, 94 struct mbuf *, struct proc *)); 95 static void udp_notify __P((struct inpcb *, int)); 96 97 void 98 udp_init() 99 { 100 LIST_INIT(&udb); 101 udbinfo.listhead = &udb; 102 udbinfo.hashbase = hashinit(UDBHASHSIZE, M_PCB, &udbinfo.hashmask); 103 udbinfo.porthashbase = hashinit(UDBHASHSIZE, M_PCB, 104 &udbinfo.porthashmask); 105 udbinfo.ipi_zone = zinit("udpcb", sizeof(struct inpcb), maxsockets, 106 ZONE_INTERRUPT, 0); 107 } 108 109 void 110 udp_input(m, iphlen) 111 register struct mbuf *m; 112 int iphlen; 113 { 114 register struct ip *ip; 115 register struct udphdr *uh; 116 register struct inpcb *inp; 117 struct mbuf *opts = 0; 118 int len; 119 struct ip save_ip; 120 121 udpstat.udps_ipackets++; 122 123 /* 124 * Strip IP options, if any; should skip this, 125 * make available to user, and use on returned packets, 126 * but we don't yet have a way to check the checksum 127 * with options still present. 128 */ 129 if (iphlen > sizeof (struct ip)) { 130 ip_stripoptions(m, (struct mbuf *)0); 131 iphlen = sizeof(struct ip); 132 } 133 134 /* 135 * Get IP and UDP header together in first mbuf. 136 */ 137 ip = mtod(m, struct ip *); 138 if (m->m_len < iphlen + sizeof(struct udphdr)) { 139 if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) { 140 udpstat.udps_hdrops++; 141 return; 142 } 143 ip = mtod(m, struct ip *); 144 } 145 uh = (struct udphdr *)((caddr_t)ip + iphlen); 146 147 /* 148 * Make mbuf data length reflect UDP length. 149 * If not enough data to reflect UDP length, drop. 150 */ 151 len = ntohs((u_short)uh->uh_ulen); 152 if (ip->ip_len != len) { 153 if (len > ip->ip_len || len < sizeof(struct udphdr)) { 154 udpstat.udps_badlen++; 155 goto bad; 156 } 157 m_adj(m, len - ip->ip_len); 158 /* ip->ip_len = len; */ 159 } 160 /* 161 * Save a copy of the IP header in case we want restore it 162 * for sending an ICMP error message in response. 163 */ 164 save_ip = *ip; 165 166 /* 167 * Checksum extended UDP header and data. 168 */ 169 if (uh->uh_sum) { 170 bzero(((struct ipovly *)ip)->ih_x1, 9); 171 ((struct ipovly *)ip)->ih_len = uh->uh_ulen; 172 uh->uh_sum = in_cksum(m, len + sizeof (struct ip)); 173 if (uh->uh_sum) { 174 udpstat.udps_badsum++; 175 m_freem(m); 176 return; 177 } 178 } 179 180 if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) || 181 in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) { 182 struct inpcb *last; 183 /* 184 * Deliver a multicast or broadcast datagram to *all* sockets 185 * for which the local and remote addresses and ports match 186 * those of the incoming datagram. This allows more than 187 * one process to receive multi/broadcasts on the same port. 188 * (This really ought to be done for unicast datagrams as 189 * well, but that would cause problems with existing 190 * applications that open both address-specific sockets and 191 * a wildcard socket listening to the same port -- they would 192 * end up receiving duplicates of every unicast datagram. 193 * Those applications open the multiple sockets to overcome an 194 * inadequacy of the UDP socket interface, but for backwards 195 * compatibility we avoid the problem here rather than 196 * fixing the interface. Maybe 4.5BSD will remedy this?) 197 */ 198 199 /* 200 * Construct sockaddr format source address. 201 */ 202 udp_in.sin_port = uh->uh_sport; 203 udp_in.sin_addr = ip->ip_src; 204 m->m_len -= sizeof (struct udpiphdr); 205 m->m_data += sizeof (struct udpiphdr); 206 /* 207 * Locate pcb(s) for datagram. 208 * (Algorithm copied from raw_intr().) 209 */ 210 last = NULL; 211 for (inp = udb.lh_first; inp != NULL; inp = inp->inp_list.le_next) { 212 if (inp->inp_lport != uh->uh_dport) 213 continue; 214 if (inp->inp_laddr.s_addr != INADDR_ANY) { 215 if (inp->inp_laddr.s_addr != 216 ip->ip_dst.s_addr) 217 continue; 218 } 219 if (inp->inp_faddr.s_addr != INADDR_ANY) { 220 if (inp->inp_faddr.s_addr != 221 ip->ip_src.s_addr || 222 inp->inp_fport != uh->uh_sport) 223 continue; 224 } 225 226 if (last != NULL) { 227 struct mbuf *n; 228 229 if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { 230 if (last->inp_flags & INP_CONTROLOPTS 231 || last->inp_socket->so_options & SO_TIMESTAMP) 232 ip_savecontrol(last, &opts, ip, n); 233 if (sbappendaddr(&last->inp_socket->so_rcv, 234 (struct sockaddr *)&udp_in, 235 n, opts) == 0) { 236 m_freem(n); 237 if (opts) 238 m_freem(opts); 239 udpstat.udps_fullsock++; 240 } else 241 sorwakeup(last->inp_socket); 242 opts = 0; 243 } 244 } 245 last = inp; 246 /* 247 * Don't look for additional matches if this one does 248 * not have either the SO_REUSEPORT or SO_REUSEADDR 249 * socket options set. This heuristic avoids searching 250 * through all pcbs in the common case of a non-shared 251 * port. It * assumes that an application will never 252 * clear these options after setting them. 253 */ 254 if ((last->inp_socket->so_options&(SO_REUSEPORT|SO_REUSEADDR)) == 0) 255 break; 256 } 257 258 if (last == NULL) { 259 /* 260 * No matching pcb found; discard datagram. 261 * (No need to send an ICMP Port Unreachable 262 * for a broadcast or multicast datgram.) 263 */ 264 udpstat.udps_noportbcast++; 265 goto bad; 266 } 267 if (last->inp_flags & INP_CONTROLOPTS 268 || last->inp_socket->so_options & SO_TIMESTAMP) 269 ip_savecontrol(last, &opts, ip, m); 270 if (sbappendaddr(&last->inp_socket->so_rcv, 271 (struct sockaddr *)&udp_in, 272 m, opts) == 0) { 273 udpstat.udps_fullsock++; 274 goto bad; 275 } 276 sorwakeup(last->inp_socket); 277 return; 278 } 279 /* 280 * Locate pcb for datagram. 281 */ 282 inp = in_pcblookup_hash(&udbinfo, ip->ip_src, uh->uh_sport, 283 ip->ip_dst, uh->uh_dport, 1); 284 if (inp == NULL) { 285 if (log_in_vain) { 286 char buf[4*sizeof "123"]; 287 288 strcpy(buf, inet_ntoa(ip->ip_dst)); 289 log(LOG_INFO, 290 "Connection attempt to UDP %s:%d from %s:%d\n", 291 buf, ntohs(uh->uh_dport), inet_ntoa(ip->ip_src), 292 ntohs(uh->uh_sport)); 293 } 294 udpstat.udps_noport++; 295 if (m->m_flags & (M_BCAST | M_MCAST)) { 296 udpstat.udps_noportbcast++; 297 goto bad; 298 } 299 *ip = save_ip; 300 #ifdef ICMP_BANDLIM 301 if (badport_bandlim(0) < 0) 302 goto bad; 303 #endif 304 icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0); 305 return; 306 } 307 308 /* 309 * Construct sockaddr format source address. 310 * Stuff source address and datagram in user buffer. 311 */ 312 udp_in.sin_port = uh->uh_sport; 313 udp_in.sin_addr = ip->ip_src; 314 if (inp->inp_flags & INP_CONTROLOPTS 315 || inp->inp_socket->so_options & SO_TIMESTAMP) 316 ip_savecontrol(inp, &opts, ip, m); 317 iphlen += sizeof(struct udphdr); 318 m->m_len -= iphlen; 319 m->m_pkthdr.len -= iphlen; 320 m->m_data += iphlen; 321 if (sbappendaddr(&inp->inp_socket->so_rcv, (struct sockaddr *)&udp_in, 322 m, opts) == 0) { 323 udpstat.udps_fullsock++; 324 goto bad; 325 } 326 sorwakeup(inp->inp_socket); 327 return; 328 bad: 329 m_freem(m); 330 if (opts) 331 m_freem(opts); 332 } 333 334 /* 335 * Notify a udp user of an asynchronous error; 336 * just wake up so that he can collect error status. 337 */ 338 static void 339 udp_notify(inp, errno) 340 register struct inpcb *inp; 341 int errno; 342 { 343 inp->inp_socket->so_error = errno; 344 sorwakeup(inp->inp_socket); 345 sowwakeup(inp->inp_socket); 346 } 347 348 void 349 udp_ctlinput(cmd, sa, vip) 350 int cmd; 351 struct sockaddr *sa; 352 void *vip; 353 { 354 register struct ip *ip = vip; 355 register struct udphdr *uh; 356 357 if (!PRC_IS_REDIRECT(cmd) && 358 ((unsigned)cmd >= PRC_NCMDS || inetctlerrmap[cmd] == 0)) 359 return; 360 if (ip) { 361 uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2)); 362 in_pcbnotify(&udb, sa, uh->uh_dport, ip->ip_src, uh->uh_sport, 363 cmd, udp_notify); 364 } else 365 in_pcbnotify(&udb, sa, 0, zeroin_addr, 0, cmd, udp_notify); 366 } 367 368 static int 369 udp_pcblist SYSCTL_HANDLER_ARGS 370 { 371 int error, i, n, s; 372 struct inpcb *inp, **inp_list; 373 inp_gen_t gencnt; 374 struct xinpgen xig; 375 376 /* 377 * The process of preparing the TCB list is too time-consuming and 378 * resource-intensive to repeat twice on every request. 379 */ 380 if (req->oldptr == 0) { 381 n = udbinfo.ipi_count; 382 req->oldidx = 2 * (sizeof xig) 383 + (n + n/8) * sizeof(struct xinpcb); 384 return 0; 385 } 386 387 if (req->newptr != 0) 388 return EPERM; 389 390 /* 391 * OK, now we're committed to doing something. 392 */ 393 s = splnet(); 394 gencnt = udbinfo.ipi_gencnt; 395 n = udbinfo.ipi_count; 396 splx(s); 397 398 xig.xig_len = sizeof xig; 399 xig.xig_count = n; 400 xig.xig_gen = gencnt; 401 xig.xig_sogen = so_gencnt; 402 error = SYSCTL_OUT(req, &xig, sizeof xig); 403 if (error) 404 return error; 405 406 inp_list = malloc(n * sizeof *inp_list, M_TEMP, M_WAITOK); 407 if (inp_list == 0) 408 return ENOMEM; 409 410 s = splnet(); 411 for (inp = udbinfo.listhead->lh_first, i = 0; inp && i < n; 412 inp = inp->inp_list.le_next) { 413 if (inp->inp_gencnt <= gencnt) 414 inp_list[i++] = inp; 415 } 416 splx(s); 417 n = i; 418 419 error = 0; 420 for (i = 0; i < n; i++) { 421 inp = inp_list[i]; 422 if (inp->inp_gencnt <= gencnt) { 423 struct xinpcb xi; 424 xi.xi_len = sizeof xi; 425 /* XXX should avoid extra copy */ 426 bcopy(inp, &xi.xi_inp, sizeof *inp); 427 if (inp->inp_socket) 428 sotoxsocket(inp->inp_socket, &xi.xi_socket); 429 error = SYSCTL_OUT(req, &xi, sizeof xi); 430 } 431 } 432 if (!error) { 433 /* 434 * Give the user an updated idea of our state. 435 * If the generation differs from what we told 436 * her before, she knows that something happened 437 * while we were processing this request, and it 438 * might be necessary to retry. 439 */ 440 s = splnet(); 441 xig.xig_gen = udbinfo.ipi_gencnt; 442 xig.xig_sogen = so_gencnt; 443 xig.xig_count = udbinfo.ipi_count; 444 splx(s); 445 error = SYSCTL_OUT(req, &xig, sizeof xig); 446 } 447 free(inp_list, M_TEMP); 448 return error; 449 } 450 451 SYSCTL_PROC(_net_inet_udp, UDPCTL_PCBLIST, pcblist, CTLFLAG_RD, 0, 0, 452 udp_pcblist, "S,xinpcb", "List of active UDP sockets"); 453 454 static int 455 udp_output(inp, m, addr, control, p) 456 register struct inpcb *inp; 457 register struct mbuf *m; 458 struct sockaddr *addr; 459 struct mbuf *control; 460 struct proc *p; 461 { 462 register struct udpiphdr *ui; 463 register int len = m->m_pkthdr.len; 464 struct in_addr laddr; 465 int s = 0, error = 0; 466 467 if (control) 468 m_freem(control); /* XXX */ 469 470 if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) { 471 error = EMSGSIZE; 472 goto release; 473 } 474 475 if (addr) { 476 laddr = inp->inp_laddr; 477 if (inp->inp_faddr.s_addr != INADDR_ANY) { 478 error = EISCONN; 479 goto release; 480 } 481 /* 482 * Must block input while temporarily connected. 483 */ 484 s = splnet(); 485 error = in_pcbconnect(inp, addr, p); 486 if (error) { 487 splx(s); 488 goto release; 489 } 490 } else { 491 if (inp->inp_faddr.s_addr == INADDR_ANY) { 492 error = ENOTCONN; 493 goto release; 494 } 495 } 496 /* 497 * Calculate data length and get a mbuf 498 * for UDP and IP headers. 499 */ 500 M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT); 501 if (m == 0) { 502 error = ENOBUFS; 503 if (addr) 504 splx(s); 505 goto release; 506 } 507 508 /* 509 * Fill in mbuf with extended UDP header 510 * and addresses and length put into network format. 511 */ 512 ui = mtod(m, struct udpiphdr *); 513 bzero(ui->ui_x1, sizeof(ui->ui_x1)); 514 ui->ui_pr = IPPROTO_UDP; 515 ui->ui_len = htons((u_short)len + sizeof (struct udphdr)); 516 ui->ui_src = inp->inp_laddr; 517 ui->ui_dst = inp->inp_faddr; 518 ui->ui_sport = inp->inp_lport; 519 ui->ui_dport = inp->inp_fport; 520 ui->ui_ulen = ui->ui_len; 521 522 /* 523 * Stuff checksum and output datagram. 524 */ 525 ui->ui_sum = 0; 526 if (udpcksum) { 527 if ((ui->ui_sum = in_cksum(m, sizeof (struct udpiphdr) + len)) == 0) 528 ui->ui_sum = 0xffff; 529 } 530 ((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len; 531 ((struct ip *)ui)->ip_ttl = inp->inp_ip_ttl; /* XXX */ 532 ((struct ip *)ui)->ip_tos = inp->inp_ip_tos; /* XXX */ 533 udpstat.udps_opackets++; 534 error = ip_output(m, inp->inp_options, &inp->inp_route, 535 inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST), 536 inp->inp_moptions); 537 538 if (addr) { 539 in_pcbdisconnect(inp); 540 inp->inp_laddr = laddr; /* XXX rehash? */ 541 splx(s); 542 } 543 return (error); 544 545 release: 546 m_freem(m); 547 return (error); 548 } 549 550 static u_long udp_sendspace = 9216; /* really max datagram size */ 551 /* 40 1K datagrams */ 552 SYSCTL_INT(_net_inet_udp, UDPCTL_MAXDGRAM, maxdgram, CTLFLAG_RW, 553 &udp_sendspace, 0, ""); 554 555 static u_long udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in)); 556 SYSCTL_INT(_net_inet_udp, UDPCTL_RECVSPACE, recvspace, CTLFLAG_RW, 557 &udp_recvspace, 0, ""); 558 559 static int 560 udp_abort(struct socket *so) 561 { 562 struct inpcb *inp; 563 int s; 564 565 inp = sotoinpcb(so); 566 if (inp == 0) 567 return EINVAL; /* ??? possible? panic instead? */ 568 soisdisconnected(so); 569 s = splnet(); 570 in_pcbdetach(inp); 571 splx(s); 572 return 0; 573 } 574 575 static int 576 udp_attach(struct socket *so, int proto, struct proc *p) 577 { 578 struct inpcb *inp; 579 int s, error; 580 581 inp = sotoinpcb(so); 582 if (inp != 0) 583 return EINVAL; 584 585 s = splnet(); 586 error = in_pcballoc(so, &udbinfo, p); 587 splx(s); 588 if (error) 589 return error; 590 error = soreserve(so, udp_sendspace, udp_recvspace); 591 if (error) 592 return error; 593 ((struct inpcb *) so->so_pcb)->inp_ip_ttl = ip_defttl; 594 return 0; 595 } 596 597 static int 598 udp_bind(struct socket *so, struct sockaddr *nam, struct proc *p) 599 { 600 struct inpcb *inp; 601 int s, error; 602 603 inp = sotoinpcb(so); 604 if (inp == 0) 605 return EINVAL; 606 s = splnet(); 607 error = in_pcbbind(inp, nam, p); 608 splx(s); 609 return error; 610 } 611 612 static int 613 udp_connect(struct socket *so, struct sockaddr *nam, struct proc *p) 614 { 615 struct inpcb *inp; 616 int s, error; 617 618 inp = sotoinpcb(so); 619 if (inp == 0) 620 return EINVAL; 621 if (inp->inp_faddr.s_addr != INADDR_ANY) 622 return EISCONN; 623 s = splnet(); 624 error = in_pcbconnect(inp, nam, p); 625 splx(s); 626 if (error == 0) 627 soisconnected(so); 628 return error; 629 } 630 631 static int 632 udp_detach(struct socket *so) 633 { 634 struct inpcb *inp; 635 int s; 636 637 inp = sotoinpcb(so); 638 if (inp == 0) 639 return EINVAL; 640 s = splnet(); 641 in_pcbdetach(inp); 642 splx(s); 643 return 0; 644 } 645 646 static int 647 udp_disconnect(struct socket *so) 648 { 649 struct inpcb *inp; 650 int s; 651 652 inp = sotoinpcb(so); 653 if (inp == 0) 654 return EINVAL; 655 if (inp->inp_faddr.s_addr == INADDR_ANY) 656 return ENOTCONN; 657 658 s = splnet(); 659 in_pcbdisconnect(inp); 660 inp->inp_laddr.s_addr = INADDR_ANY; 661 splx(s); 662 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 663 return 0; 664 } 665 666 static int 667 udp_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 668 struct mbuf *control, struct proc *p) 669 { 670 struct inpcb *inp; 671 672 inp = sotoinpcb(so); 673 if (inp == 0) { 674 m_freem(m); 675 return EINVAL; 676 } 677 return udp_output(inp, m, addr, control, p); 678 } 679 680 static int 681 udp_shutdown(struct socket *so) 682 { 683 struct inpcb *inp; 684 685 inp = sotoinpcb(so); 686 if (inp == 0) 687 return EINVAL; 688 socantsendmore(so); 689 return 0; 690 } 691 692 struct pr_usrreqs udp_usrreqs = { 693 udp_abort, pru_accept_notsupp, udp_attach, udp_bind, udp_connect, 694 pru_connect2_notsupp, in_control, udp_detach, udp_disconnect, 695 pru_listen_notsupp, in_setpeeraddr, pru_rcvd_notsupp, 696 pru_rcvoob_notsupp, udp_send, pru_sense_null, udp_shutdown, 697 in_setsockaddr, sosend, soreceive, sopoll 698 }; 699 700