1 /* $NetBSD: ddp_usrreq.c,v 1.71 2018/02/17 19:10:18 rjs Exp $ */ 2 3 /* 4 * Copyright (c) 1990,1991 Regents of The University of Michigan. 5 * All Rights Reserved. 6 * 7 * Permission to use, copy, modify, and distribute this software and 8 * its documentation for any purpose and without fee is hereby granted, 9 * provided that the above copyright notice appears in all copies and 10 * that both that copyright notice and this permission notice appear 11 * in supporting documentation, and that the name of The University 12 * of Michigan not be used in advertising or publicity pertaining to 13 * distribution of the software without specific, written prior 14 * permission. This software is supplied as is without expressed or 15 * implied warranties of any kind. 16 * 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 20 * Research Systems Unix Group 21 * The University of Michigan 22 * c/o Wesley Craig 23 * 535 W. William Street 24 * Ann Arbor, Michigan 25 * +1-313-764-2278 26 * netatalk@umich.edu 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: ddp_usrreq.c,v 1.71 2018/02/17 19:10:18 rjs Exp $"); 31 32 #include "opt_mbuftrace.h" 33 #include "opt_atalk.h" 34 35 #include <sys/param.h> 36 #include <sys/errno.h> 37 #include <sys/systm.h> 38 #include <sys/mbuf.h> 39 #include <sys/ioctl.h> 40 #include <sys/queue.h> 41 #include <sys/socket.h> 42 #include <sys/socketvar.h> 43 #include <sys/protosw.h> 44 #include <sys/kauth.h> 45 #include <sys/kmem.h> 46 #include <sys/sysctl.h> 47 #include <net/if.h> 48 #include <net/route.h> 49 #include <net/if_ether.h> 50 #include <net/net_stats.h> 51 #include <netinet/in.h> 52 53 #include <netatalk/at.h> 54 #include <netatalk/at_var.h> 55 #include <netatalk/ddp_var.h> 56 #include <netatalk/ddp_private.h> 57 #include <netatalk/aarp.h> 58 #include <netatalk/at_extern.h> 59 60 static void at_pcbdisconnect(struct ddpcb *); 61 static void at_sockaddr(struct ddpcb *, struct sockaddr_at *); 62 static int at_pcbsetaddr(struct ddpcb *, struct sockaddr_at *); 63 static int at_pcbconnect(struct ddpcb *, struct sockaddr_at *); 64 static void ddp_detach(struct socket *); 65 66 struct ifqueue atintrq1, atintrq2; 67 struct ddpcb *ddp_ports[ATPORT_LAST]; 68 struct ddpcb *ddpcb = NULL; 69 percpu_t *ddpstat_percpu; 70 struct at_ifaddrhead at_ifaddr; /* Here as inited in this file */ 71 u_long ddp_sendspace = DDP_MAXSZ; /* Max ddp size + 1 (ddp_type) */ 72 u_long ddp_recvspace = 25 * (587 + sizeof(struct sockaddr_at)); 73 74 #ifdef MBUFTRACE 75 struct mowner atalk_rx_mowner = MOWNER_INIT("atalk", "rx"); 76 struct mowner atalk_tx_mowner = MOWNER_INIT("atalk", "tx"); 77 #endif 78 79 static void 80 at_sockaddr(struct ddpcb *ddp, struct sockaddr_at *addr) 81 { 82 83 *addr = ddp->ddp_lsat; 84 } 85 86 static int 87 at_pcbsetaddr(struct ddpcb *ddp, struct sockaddr_at *sat) 88 { 89 struct sockaddr_at lsat; 90 struct at_ifaddr *aa; 91 struct ddpcb *ddpp; 92 93 if (ddp->ddp_lsat.sat_port != ATADDR_ANYPORT) { /* shouldn't be bound */ 94 return (EINVAL); 95 } 96 if (NULL != sat) { /* validate passed address */ 97 98 if (sat->sat_family != AF_APPLETALK) 99 return (EAFNOSUPPORT); 100 101 if (sat->sat_addr.s_node != ATADDR_ANYNODE || 102 sat->sat_addr.s_net != ATADDR_ANYNET) { 103 TAILQ_FOREACH(aa, &at_ifaddr, aa_list) { 104 if ((sat->sat_addr.s_net == 105 AA_SAT(aa)->sat_addr.s_net) && 106 (sat->sat_addr.s_node == 107 AA_SAT(aa)->sat_addr.s_node)) 108 break; 109 } 110 if (!aa) 111 return (EADDRNOTAVAIL); 112 } 113 if (sat->sat_port != ATADDR_ANYPORT) { 114 int error; 115 116 if (sat->sat_port < ATPORT_FIRST || 117 sat->sat_port >= ATPORT_LAST) 118 return (EINVAL); 119 120 if (sat->sat_port < ATPORT_RESERVED && 121 (error = kauth_authorize_network(curlwp->l_cred, 122 KAUTH_NETWORK_BIND, KAUTH_REQ_NETWORK_BIND_PRIVPORT, 123 ddpcb->ddp_socket, sat, NULL)) != 0) 124 return (error); 125 } 126 } else { 127 memset((void *) & lsat, 0, sizeof(struct sockaddr_at)); 128 lsat.sat_len = sizeof(struct sockaddr_at); 129 lsat.sat_addr.s_node = ATADDR_ANYNODE; 130 lsat.sat_addr.s_net = ATADDR_ANYNET; 131 lsat.sat_family = AF_APPLETALK; 132 sat = &lsat; 133 } 134 135 if (sat->sat_addr.s_node == ATADDR_ANYNODE && 136 sat->sat_addr.s_net == ATADDR_ANYNET) { 137 if (TAILQ_EMPTY(&at_ifaddr)) 138 return EADDRNOTAVAIL; 139 sat->sat_addr = AA_SAT(TAILQ_FIRST(&at_ifaddr))->sat_addr; 140 } 141 ddp->ddp_lsat = *sat; 142 143 /* 144 * Choose port. 145 */ 146 if (sat->sat_port == ATADDR_ANYPORT) { 147 for (sat->sat_port = ATPORT_RESERVED; 148 sat->sat_port < ATPORT_LAST; sat->sat_port++) { 149 if (ddp_ports[sat->sat_port - 1] == 0) 150 break; 151 } 152 if (sat->sat_port == ATPORT_LAST) { 153 return (EADDRNOTAVAIL); 154 } 155 ddp->ddp_lsat.sat_port = sat->sat_port; 156 ddp_ports[sat->sat_port - 1] = ddp; 157 } else { 158 for (ddpp = ddp_ports[sat->sat_port - 1]; ddpp; 159 ddpp = ddpp->ddp_pnext) { 160 if (ddpp->ddp_lsat.sat_addr.s_net == 161 sat->sat_addr.s_net && 162 ddpp->ddp_lsat.sat_addr.s_node == 163 sat->sat_addr.s_node) 164 break; 165 } 166 if (ddpp != NULL) 167 return (EADDRINUSE); 168 169 ddp->ddp_pnext = ddp_ports[sat->sat_port - 1]; 170 ddp_ports[sat->sat_port - 1] = ddp; 171 if (ddp->ddp_pnext) 172 ddp->ddp_pnext->ddp_pprev = ddp; 173 } 174 175 return 0; 176 } 177 178 static int 179 at_pcbconnect(struct ddpcb *ddp, struct sockaddr_at *sat) 180 { 181 struct rtentry *rt; 182 const struct sockaddr_at *cdst; 183 struct route *ro; 184 struct at_ifaddr *aa; 185 struct ifnet *ifp; 186 u_short hintnet = 0, net; 187 188 if (sat->sat_family != AF_APPLETALK) { 189 return EAFNOSUPPORT; 190 } 191 /* 192 * Under phase 2, network 0 means "the network". We take "the 193 * network" to mean the network the control block is bound to. 194 * If the control block is not bound, there is an error. 195 */ 196 if (sat->sat_addr.s_net == ATADDR_ANYNET 197 && sat->sat_addr.s_node != ATADDR_ANYNODE) { 198 if (ddp->ddp_lsat.sat_port == ATADDR_ANYPORT) { 199 return EADDRNOTAVAIL; 200 } 201 hintnet = ddp->ddp_lsat.sat_addr.s_net; 202 } 203 ro = &ddp->ddp_route; 204 /* 205 * If we've got an old route for this pcb, check that it is valid. 206 * If we've changed our address, we may have an old "good looking" 207 * route here. Attempt to detect it. 208 */ 209 if ((rt = rtcache_validate(ro)) != NULL || 210 (rt = rtcache_update(ro, 1)) != NULL) { 211 if (hintnet) { 212 net = hintnet; 213 } else { 214 net = sat->sat_addr.s_net; 215 } 216 if ((ifp = rt->rt_ifp) != NULL) { 217 TAILQ_FOREACH(aa, &at_ifaddr, aa_list) { 218 if (aa->aa_ifp == ifp && 219 ntohs(net) >= ntohs(aa->aa_firstnet) && 220 ntohs(net) <= ntohs(aa->aa_lastnet)) { 221 break; 222 } 223 } 224 } else 225 aa = NULL; 226 cdst = satocsat(rtcache_getdst(ro)); 227 if (aa == NULL || (cdst->sat_addr.s_net != 228 (hintnet ? hintnet : sat->sat_addr.s_net) || 229 cdst->sat_addr.s_node != sat->sat_addr.s_node)) { 230 rtcache_unref(rt, ro); 231 rtcache_free(ro); 232 rt = NULL; 233 } 234 } 235 /* 236 * If we've got no route for this interface, try to find one. 237 */ 238 if (rt == NULL) { 239 union { 240 struct sockaddr dst; 241 struct sockaddr_at dsta; 242 } u; 243 244 sockaddr_at_init(&u.dsta, &sat->sat_addr, 0); 245 if (hintnet) 246 u.dsta.sat_addr.s_net = hintnet; 247 rt = rtcache_lookup(ro, &u.dst); 248 } 249 /* 250 * Make sure any route that we have has a valid interface. 251 */ 252 if (rt != NULL && (ifp = rt->rt_ifp) != NULL) { 253 TAILQ_FOREACH(aa, &at_ifaddr, aa_list) { 254 if (aa->aa_ifp == ifp) 255 break; 256 } 257 } else 258 aa = NULL; 259 rtcache_unref(rt, ro); 260 if (aa == NULL) 261 return ENETUNREACH; 262 ddp->ddp_fsat = *sat; 263 if (ddp->ddp_lsat.sat_port == ATADDR_ANYPORT) 264 return at_pcbsetaddr(ddp, NULL); 265 return 0; 266 } 267 268 static void 269 at_pcbdisconnect(struct ddpcb *ddp) 270 { 271 ddp->ddp_fsat.sat_addr.s_net = ATADDR_ANYNET; 272 ddp->ddp_fsat.sat_addr.s_node = ATADDR_ANYNODE; 273 ddp->ddp_fsat.sat_port = ATADDR_ANYPORT; 274 } 275 276 static int 277 ddp_attach(struct socket *so, int proto) 278 { 279 struct ddpcb *ddp; 280 int error; 281 282 KASSERT(sotoddpcb(so) == NULL); 283 sosetlock(so); 284 #ifdef MBUFTRACE 285 so->so_rcv.sb_mowner = &atalk_rx_mowner; 286 so->so_snd.sb_mowner = &atalk_tx_mowner; 287 #endif 288 error = soreserve(so, ddp_sendspace, ddp_recvspace); 289 if (error) { 290 return error; 291 } 292 293 ddp = kmem_zalloc(sizeof(*ddp), KM_SLEEP); 294 ddp->ddp_lsat.sat_port = ATADDR_ANYPORT; 295 296 ddp->ddp_next = ddpcb; 297 ddp->ddp_prev = NULL; 298 ddp->ddp_pprev = NULL; 299 ddp->ddp_pnext = NULL; 300 if (ddpcb) { 301 ddpcb->ddp_prev = ddp; 302 } 303 ddpcb = ddp; 304 305 ddp->ddp_socket = so; 306 so->so_pcb = ddp; 307 return 0; 308 } 309 310 static void 311 ddp_detach(struct socket *so) 312 { 313 struct ddpcb *ddp = sotoddpcb(so); 314 315 soisdisconnected(so); 316 so->so_pcb = NULL; 317 /* sofree drops the lock */ 318 sofree(so); 319 mutex_enter(softnet_lock); 320 321 /* remove ddp from ddp_ports list */ 322 if (ddp->ddp_lsat.sat_port != ATADDR_ANYPORT && 323 ddp_ports[ddp->ddp_lsat.sat_port - 1] != NULL) { 324 if (ddp->ddp_pprev != NULL) { 325 ddp->ddp_pprev->ddp_pnext = ddp->ddp_pnext; 326 } else { 327 ddp_ports[ddp->ddp_lsat.sat_port - 1] = ddp->ddp_pnext; 328 } 329 if (ddp->ddp_pnext != NULL) { 330 ddp->ddp_pnext->ddp_pprev = ddp->ddp_pprev; 331 } 332 } 333 rtcache_free(&ddp->ddp_route); 334 if (ddp->ddp_prev) { 335 ddp->ddp_prev->ddp_next = ddp->ddp_next; 336 } else { 337 ddpcb = ddp->ddp_next; 338 } 339 if (ddp->ddp_next) { 340 ddp->ddp_next->ddp_prev = ddp->ddp_prev; 341 } 342 kmem_free(ddp, sizeof(*ddp)); 343 } 344 345 static int 346 ddp_accept(struct socket *so, struct sockaddr *nam) 347 { 348 KASSERT(solocked(so)); 349 350 return EOPNOTSUPP; 351 } 352 353 static int 354 ddp_bind(struct socket *so, struct sockaddr *nam, struct lwp *l) 355 { 356 KASSERT(solocked(so)); 357 KASSERT(sotoddpcb(so) != NULL); 358 359 return at_pcbsetaddr(sotoddpcb(so), (struct sockaddr_at *)nam); 360 } 361 362 static int 363 ddp_listen(struct socket *so, struct lwp *l) 364 { 365 KASSERT(solocked(so)); 366 367 return EOPNOTSUPP; 368 } 369 370 static int 371 ddp_connect(struct socket *so, struct sockaddr *nam, struct lwp *l) 372 { 373 struct ddpcb *ddp = sotoddpcb(so); 374 int error = 0; 375 376 KASSERT(solocked(so)); 377 KASSERT(ddp != NULL); 378 KASSERT(nam != NULL); 379 380 if (ddp->ddp_fsat.sat_port != ATADDR_ANYPORT) 381 return EISCONN; 382 error = at_pcbconnect(ddp, (struct sockaddr_at *)nam); 383 if (error == 0) 384 soisconnected(so); 385 386 return error; 387 } 388 389 static int 390 ddp_connect2(struct socket *so, struct socket *so2) 391 { 392 KASSERT(solocked(so)); 393 394 return EOPNOTSUPP; 395 } 396 397 static int 398 ddp_disconnect(struct socket *so) 399 { 400 struct ddpcb *ddp = sotoddpcb(so); 401 402 KASSERT(solocked(so)); 403 KASSERT(ddp != NULL); 404 405 if (ddp->ddp_fsat.sat_addr.s_node == ATADDR_ANYNODE) 406 return ENOTCONN; 407 408 at_pcbdisconnect(ddp); 409 soisdisconnected(so); 410 return 0; 411 } 412 413 static int 414 ddp_shutdown(struct socket *so) 415 { 416 KASSERT(solocked(so)); 417 418 socantsendmore(so); 419 return 0; 420 } 421 422 static int 423 ddp_abort(struct socket *so) 424 { 425 KASSERT(solocked(so)); 426 427 soisdisconnected(so); 428 ddp_detach(so); 429 return 0; 430 } 431 432 static int 433 ddp_ioctl(struct socket *so, u_long cmd, void *addr, struct ifnet *ifp) 434 { 435 return at_control(cmd, addr, ifp); 436 } 437 438 static int 439 ddp_stat(struct socket *so, struct stat *ub) 440 { 441 KASSERT(solocked(so)); 442 443 /* stat: don't bother with a blocksize. */ 444 return 0; 445 } 446 447 static int 448 ddp_peeraddr(struct socket *so, struct sockaddr *nam) 449 { 450 KASSERT(solocked(so)); 451 452 return EOPNOTSUPP; 453 } 454 455 static int 456 ddp_sockaddr(struct socket *so, struct sockaddr *nam) 457 { 458 KASSERT(solocked(so)); 459 KASSERT(sotoddpcb(so) != NULL); 460 KASSERT(nam != NULL); 461 462 at_sockaddr(sotoddpcb(so), (struct sockaddr_at *)nam); 463 return 0; 464 } 465 466 static int 467 ddp_rcvd(struct socket *so, int flags, struct lwp *l) 468 { 469 KASSERT(solocked(so)); 470 471 return EOPNOTSUPP; 472 } 473 474 static int 475 ddp_recvoob(struct socket *so, struct mbuf *m, int flags) 476 { 477 KASSERT(solocked(so)); 478 479 return EOPNOTSUPP; 480 } 481 482 static int 483 ddp_send(struct socket *so, struct mbuf *m, struct sockaddr *nam, 484 struct mbuf *control, struct lwp *l) 485 { 486 struct ddpcb *ddp = sotoddpcb(so); 487 int error = 0; 488 int s = 0; /* XXX gcc 4.8 warns on sgimips */ 489 490 KASSERT(solocked(so)); 491 KASSERT(ddp != NULL); 492 493 if (nam) { 494 if (ddp->ddp_fsat.sat_port != ATADDR_ANYPORT) 495 return EISCONN; 496 s = splnet(); 497 error = at_pcbconnect(ddp, (struct sockaddr_at *)nam); 498 if (error) { 499 splx(s); 500 return error; 501 } 502 } else { 503 if (ddp->ddp_fsat.sat_port == ATADDR_ANYPORT) 504 return ENOTCONN; 505 } 506 507 error = ddp_output(m, ddp); 508 m = NULL; 509 if (nam) { 510 at_pcbdisconnect(ddp); 511 splx(s); 512 } 513 514 return error; 515 } 516 517 static int 518 ddp_sendoob(struct socket *so, struct mbuf *m, struct mbuf *control) 519 { 520 KASSERT(solocked(so)); 521 522 if (m) 523 m_freem(m); 524 525 return EOPNOTSUPP; 526 } 527 528 static int 529 ddp_purgeif(struct socket *so, struct ifnet *ifp) 530 { 531 532 mutex_enter(softnet_lock); 533 at_purgeif(ifp); 534 mutex_exit(softnet_lock); 535 536 return 0; 537 } 538 539 /* 540 * For the moment, this just find the pcb with the correct local address. 541 * In the future, this will actually do some real searching, so we can use 542 * the sender's address to do de-multiplexing on a single port to many 543 * sockets (pcbs). 544 */ 545 struct ddpcb * 546 ddp_search( 547 struct sockaddr_at *from, 548 struct sockaddr_at *to, 549 struct at_ifaddr *aa) 550 { 551 struct ddpcb *ddp; 552 553 /* 554 * Check for bad ports. 555 */ 556 if (to->sat_port < ATPORT_FIRST || to->sat_port >= ATPORT_LAST) 557 return NULL; 558 559 /* 560 * Make sure the local address matches the sent address. What about 561 * the interface? 562 */ 563 for (ddp = ddp_ports[to->sat_port - 1]; ddp; ddp = ddp->ddp_pnext) { 564 /* XXX should we handle 0.YY? */ 565 566 /* XXXX.YY to socket on destination interface */ 567 if (to->sat_addr.s_net == ddp->ddp_lsat.sat_addr.s_net && 568 to->sat_addr.s_node == ddp->ddp_lsat.sat_addr.s_node) { 569 break; 570 } 571 /* 0.255 to socket on receiving interface */ 572 if (to->sat_addr.s_node == ATADDR_BCAST && 573 (to->sat_addr.s_net == 0 || 574 to->sat_addr.s_net == ddp->ddp_lsat.sat_addr.s_net) && 575 ddp->ddp_lsat.sat_addr.s_net == AA_SAT(aa)->sat_addr.s_net) { 576 break; 577 } 578 /* XXXX.0 to socket on destination interface */ 579 if (to->sat_addr.s_net == aa->aa_firstnet && 580 to->sat_addr.s_node == 0 && 581 ntohs(ddp->ddp_lsat.sat_addr.s_net) >= 582 ntohs(aa->aa_firstnet) && 583 ntohs(ddp->ddp_lsat.sat_addr.s_net) <= 584 ntohs(aa->aa_lastnet)) { 585 break; 586 } 587 } 588 return (ddp); 589 } 590 591 /* 592 * Initialize all the ddp & appletalk stuff 593 */ 594 void 595 ddp_init(void) 596 { 597 598 ddpstat_percpu = percpu_alloc(sizeof(uint64_t) * DDP_NSTATS); 599 600 TAILQ_INIT(&at_ifaddr); 601 atintrq1.ifq_maxlen = IFQ_MAXLEN; 602 atintrq2.ifq_maxlen = IFQ_MAXLEN; 603 IFQ_LOCK_INIT(&atintrq1); 604 IFQ_LOCK_INIT(&atintrq2); 605 606 MOWNER_ATTACH(&atalk_tx_mowner); 607 MOWNER_ATTACH(&atalk_rx_mowner); 608 MOWNER_ATTACH(&aarp_mowner); 609 } 610 611 PR_WRAP_USRREQS(ddp) 612 #define ddp_attach ddp_attach_wrapper 613 #define ddp_detach ddp_detach_wrapper 614 #define ddp_accept ddp_accept_wrapper 615 #define ddp_bind ddp_bind_wrapper 616 #define ddp_listen ddp_listen_wrapper 617 #define ddp_connect ddp_connect_wrapper 618 #define ddp_connect2 ddp_connect2_wrapper 619 #define ddp_disconnect ddp_disconnect_wrapper 620 #define ddp_shutdown ddp_shutdown_wrapper 621 #define ddp_abort ddp_abort_wrapper 622 #define ddp_ioctl ddp_ioctl_wrapper 623 #define ddp_stat ddp_stat_wrapper 624 #define ddp_peeraddr ddp_peeraddr_wrapper 625 #define ddp_sockaddr ddp_sockaddr_wrapper 626 #define ddp_rcvd ddp_rcvd_wrapper 627 #define ddp_recvoob ddp_recvoob_wrapper 628 #define ddp_send ddp_send_wrapper 629 #define ddp_sendoob ddp_sendoob_wrapper 630 #define ddp_purgeif ddp_purgeif_wrapper 631 632 const struct pr_usrreqs ddp_usrreqs = { 633 .pr_attach = ddp_attach, 634 .pr_detach = ddp_detach, 635 .pr_accept = ddp_accept, 636 .pr_bind = ddp_bind, 637 .pr_listen = ddp_listen, 638 .pr_connect = ddp_connect, 639 .pr_connect2 = ddp_connect2, 640 .pr_disconnect = ddp_disconnect, 641 .pr_shutdown = ddp_shutdown, 642 .pr_abort = ddp_abort, 643 .pr_ioctl = ddp_ioctl, 644 .pr_stat = ddp_stat, 645 .pr_peeraddr = ddp_peeraddr, 646 .pr_sockaddr = ddp_sockaddr, 647 .pr_rcvd = ddp_rcvd, 648 .pr_recvoob = ddp_recvoob, 649 .pr_send = ddp_send, 650 .pr_sendoob = ddp_sendoob, 651 .pr_purgeif = ddp_purgeif, 652 }; 653 654 static int 655 sysctl_net_atalk_ddp_stats(SYSCTLFN_ARGS) 656 { 657 658 return (NETSTAT_SYSCTL(ddpstat_percpu, DDP_NSTATS)); 659 } 660 661 /* 662 * Sysctl for DDP variables. 663 */ 664 SYSCTL_SETUP(sysctl_net_atalk_ddp_setup, "sysctl net.atalk.ddp subtree setup") 665 { 666 667 sysctl_createv(clog, 0, NULL, NULL, 668 CTLFLAG_PERMANENT, 669 CTLTYPE_NODE, "atalk", NULL, 670 NULL, 0, NULL, 0, 671 CTL_NET, PF_APPLETALK, CTL_EOL); 672 sysctl_createv(clog, 0, NULL, NULL, 673 CTLFLAG_PERMANENT, 674 CTLTYPE_NODE, "ddp", 675 SYSCTL_DESCR("DDP related settings"), 676 NULL, 0, NULL, 0, 677 CTL_NET, PF_APPLETALK, ATPROTO_DDP, CTL_EOL); 678 679 sysctl_createv(clog, 0, NULL, NULL, 680 CTLFLAG_PERMANENT, 681 CTLTYPE_STRUCT, "stats", 682 SYSCTL_DESCR("DDP statistics"), 683 sysctl_net_atalk_ddp_stats, 0, NULL, 0, 684 CTL_NET, PF_APPLETALK, ATPROTO_DDP, CTL_CREATE, 685 CTL_EOL); 686 } 687