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ddp_usrreq.c revision 1.40 
      1 /*	$NetBSD: ddp_usrreq.c,v 1.40 2011/05/08 13:51:31 bouyer 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 (at) umich.edu
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 __KERNEL_RCSID(0, "$NetBSD: ddp_usrreq.c,v 1.40 2011/05/08 13:51:31 bouyer Exp $");
     31 
     32 #include "opt_mbuftrace.h"
     33 
     34 #include <sys/param.h>
     35 #include <sys/errno.h>
     36 #include <sys/systm.h>
     37 #include <sys/proc.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/sysctl.h>
     46 #include <net/if.h>
     47 #include <net/route.h>
     48 #include <net/if_ether.h>
     49 #include <net/net_stats.h>
     50 #include <netinet/in.h>
     51 
     52 #include <netatalk/at.h>
     53 #include <netatalk/at_var.h>
     54 #include <netatalk/ddp_var.h>
     55 #include <netatalk/ddp_private.h>
     56 #include <netatalk/aarp.h>
     57 #include <netatalk/at_extern.h>
     58 
     59 static void at_pcbdisconnect(struct ddpcb *);
     60 static void at_sockaddr(struct ddpcb *, struct mbuf *);
     61 static int at_pcbsetaddr(struct ddpcb *, struct mbuf *, struct lwp *);
     62 static int at_pcbconnect(struct ddpcb *, struct mbuf *, struct lwp *);
     63 static void at_pcbdetach(struct socket *, struct ddpcb *);
     64 static int at_pcballoc(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 /* ARGSUSED */
     80 int
     81 ddp_usrreq(struct socket *so, int req, struct mbuf *m, struct mbuf *addr, struct mbuf *rights, struct lwp *l)
     82 {
     83 	struct ddpcb   *ddp;
     84 	int             error = 0;
     85 
     86 	ddp = sotoddpcb(so);
     87 
     88 	if (req == PRU_CONTROL) {
     89 		return (at_control((long) m, (void *) addr,
     90 		    (struct ifnet *) rights, l));
     91 	}
     92 	if (req == PRU_PURGEIF) {
     93 		mutex_enter(softnet_lock);
     94 		at_purgeif((struct ifnet *) rights);
     95 		mutex_exit(softnet_lock);
     96 		return (0);
     97 	}
     98 	if (rights && rights->m_len) {
     99 		error = EINVAL;
    100 		goto release;
    101 	}
    102 	if (ddp == NULL && req != PRU_ATTACH) {
    103 		error = EINVAL;
    104 		goto release;
    105 	}
    106 	switch (req) {
    107 	case PRU_ATTACH:
    108 		if (ddp != NULL) {
    109 			error = EINVAL;
    110 			break;
    111 		}
    112 		sosetlock(so);
    113 		if ((error = at_pcballoc(so)) != 0) {
    114 			break;
    115 		}
    116 		error = soreserve(so, ddp_sendspace, ddp_recvspace);
    117 		break;
    118 
    119 	case PRU_DETACH:
    120 		at_pcbdetach(so, ddp);
    121 		break;
    122 
    123 	case PRU_BIND:
    124 		error = at_pcbsetaddr(ddp, addr, l);
    125 		break;
    126 
    127 	case PRU_SOCKADDR:
    128 		at_sockaddr(ddp, addr);
    129 		break;
    130 
    131 	case PRU_CONNECT:
    132 		if (ddp->ddp_fsat.sat_port != ATADDR_ANYPORT) {
    133 			error = EISCONN;
    134 			break;
    135 		}
    136 		error = at_pcbconnect(ddp, addr, l);
    137 		if (error == 0)
    138 			soisconnected(so);
    139 		break;
    140 
    141 	case PRU_DISCONNECT:
    142 		if (ddp->ddp_fsat.sat_addr.s_node == ATADDR_ANYNODE) {
    143 			error = ENOTCONN;
    144 			break;
    145 		}
    146 		at_pcbdisconnect(ddp);
    147 		soisdisconnected(so);
    148 		break;
    149 
    150 	case PRU_SHUTDOWN:
    151 		socantsendmore(so);
    152 		break;
    153 
    154 	case PRU_SEND:{
    155 			int s = 0;
    156 
    157 			if (addr) {
    158 				if (ddp->ddp_fsat.sat_port != ATADDR_ANYPORT) {
    159 					error = EISCONN;
    160 					break;
    161 				}
    162 				s = splnet();
    163 				error = at_pcbconnect(ddp, addr, l);
    164 				if (error) {
    165 					splx(s);
    166 					break;
    167 				}
    168 			} else {
    169 				if (ddp->ddp_fsat.sat_port == ATADDR_ANYPORT) {
    170 					error = ENOTCONN;
    171 					break;
    172 				}
    173 			}
    174 
    175 			error = ddp_output(m, ddp);
    176 			m = NULL;
    177 			if (addr) {
    178 				at_pcbdisconnect(ddp);
    179 				splx(s);
    180 			}
    181 		}
    182 		break;
    183 
    184 	case PRU_ABORT:
    185 		soisdisconnected(so);
    186 		at_pcbdetach(so, ddp);
    187 		break;
    188 
    189 	case PRU_LISTEN:
    190 	case PRU_CONNECT2:
    191 	case PRU_ACCEPT:
    192 	case PRU_SENDOOB:
    193 	case PRU_FASTTIMO:
    194 	case PRU_SLOWTIMO:
    195 	case PRU_PROTORCV:
    196 	case PRU_PROTOSEND:
    197 		error = EOPNOTSUPP;
    198 		break;
    199 
    200 	case PRU_RCVD:
    201 	case PRU_RCVOOB:
    202 		/*
    203 		 * Don't mfree. Good architecture...
    204 		 */
    205 		return (EOPNOTSUPP);
    206 
    207 	case PRU_SENSE:
    208 		/*
    209 		 * 1. Don't return block size.
    210 		 * 2. Don't mfree.
    211 		 */
    212 		return (0);
    213 
    214 	default:
    215 		error = EOPNOTSUPP;
    216 	}
    217 
    218 release:
    219 	if (m != NULL) {
    220 		m_freem(m);
    221 	}
    222 	return (error);
    223 }
    224 
    225 static void
    226 at_sockaddr(struct ddpcb *ddp, struct mbuf *addr)
    227 {
    228 	struct sockaddr_at *sat;
    229 
    230 	addr->m_len = sizeof(struct sockaddr_at);
    231 	sat = mtod(addr, struct sockaddr_at *);
    232 	*sat = ddp->ddp_lsat;
    233 }
    234 
    235 static int
    236 at_pcbsetaddr(struct ddpcb *ddp, struct mbuf *addr, struct lwp *l)
    237 {
    238 	struct sockaddr_at lsat, *sat;
    239 	struct at_ifaddr *aa;
    240 	struct ddpcb   *ddpp;
    241 
    242 	if (ddp->ddp_lsat.sat_port != ATADDR_ANYPORT) {	/* shouldn't be bound */
    243 		return (EINVAL);
    244 	}
    245 	if (addr != 0) {	/* validate passed address */
    246 		sat = mtod(addr, struct sockaddr_at *);
    247 		if (addr->m_len != sizeof(*sat))
    248 			return (EINVAL);
    249 
    250 		if (sat->sat_family != AF_APPLETALK)
    251 			return (EAFNOSUPPORT);
    252 
    253 		if (sat->sat_addr.s_node != ATADDR_ANYNODE ||
    254 		    sat->sat_addr.s_net != ATADDR_ANYNET) {
    255 			TAILQ_FOREACH(aa, &at_ifaddr, aa_list) {
    256 				if ((sat->sat_addr.s_net ==
    257 				    AA_SAT(aa)->sat_addr.s_net) &&
    258 				    (sat->sat_addr.s_node ==
    259 				    AA_SAT(aa)->sat_addr.s_node))
    260 					break;
    261 			}
    262 			if (!aa)
    263 				return (EADDRNOTAVAIL);
    264 		}
    265 		if (sat->sat_port != ATADDR_ANYPORT) {
    266 			int error;
    267 
    268 			if (sat->sat_port < ATPORT_FIRST ||
    269 			    sat->sat_port >= ATPORT_LAST)
    270 				return (EINVAL);
    271 
    272 			if (sat->sat_port < ATPORT_RESERVED && l &&
    273 			    (error = kauth_authorize_network(l->l_cred,
    274 			    KAUTH_NETWORK_BIND, KAUTH_REQ_NETWORK_BIND_PRIVPORT,
    275 			    ddpcb->ddp_socket, sat, NULL)) != 0)
    276 				return (error);
    277 		}
    278 	} else {
    279 		memset((void *) & lsat, 0, sizeof(struct sockaddr_at));
    280 		lsat.sat_len = sizeof(struct sockaddr_at);
    281 		lsat.sat_addr.s_node = ATADDR_ANYNODE;
    282 		lsat.sat_addr.s_net = ATADDR_ANYNET;
    283 		lsat.sat_family = AF_APPLETALK;
    284 		sat = &lsat;
    285 	}
    286 
    287 	if (sat->sat_addr.s_node == ATADDR_ANYNODE &&
    288 	    sat->sat_addr.s_net == ATADDR_ANYNET) {
    289 		if (TAILQ_EMPTY(&at_ifaddr))
    290 			return EADDRNOTAVAIL;
    291 		sat->sat_addr = AA_SAT(TAILQ_FIRST(&at_ifaddr))->sat_addr;
    292 	}
    293 	ddp->ddp_lsat = *sat;
    294 
    295 	/*
    296          * Choose port.
    297          */
    298 	if (sat->sat_port == ATADDR_ANYPORT) {
    299 		for (sat->sat_port = ATPORT_RESERVED;
    300 		     sat->sat_port < ATPORT_LAST; sat->sat_port++) {
    301 			if (ddp_ports[sat->sat_port - 1] == 0)
    302 				break;
    303 		}
    304 		if (sat->sat_port == ATPORT_LAST) {
    305 			return (EADDRNOTAVAIL);
    306 		}
    307 		ddp->ddp_lsat.sat_port = sat->sat_port;
    308 		ddp_ports[sat->sat_port - 1] = ddp;
    309 	} else {
    310 		for (ddpp = ddp_ports[sat->sat_port - 1]; ddpp;
    311 		     ddpp = ddpp->ddp_pnext) {
    312 			if (ddpp->ddp_lsat.sat_addr.s_net ==
    313 			    sat->sat_addr.s_net &&
    314 			    ddpp->ddp_lsat.sat_addr.s_node ==
    315 			    sat->sat_addr.s_node)
    316 				break;
    317 		}
    318 		if (ddpp != NULL)
    319 			return (EADDRINUSE);
    320 
    321 		ddp->ddp_pnext = ddp_ports[sat->sat_port - 1];
    322 		ddp_ports[sat->sat_port - 1] = ddp;
    323 		if (ddp->ddp_pnext)
    324 			ddp->ddp_pnext->ddp_pprev = ddp;
    325 	}
    326 
    327 	return 0;
    328 }
    329 
    330 static int
    331 at_pcbconnect(struct ddpcb *ddp, struct mbuf *addr, struct lwp *l)
    332 {
    333 	struct rtentry *rt;
    334 	const struct sockaddr_at *cdst;
    335 	struct sockaddr_at *sat = mtod(addr, struct sockaddr_at *);
    336 	struct route *ro;
    337 	struct at_ifaddr *aa;
    338 	struct ifnet   *ifp;
    339 	u_short         hintnet = 0, net;
    340 
    341 	if (addr->m_len != sizeof(*sat))
    342 		return EINVAL;
    343 	if (sat->sat_family != AF_APPLETALK) {
    344 		return EAFNOSUPPORT;
    345 	}
    346 	/*
    347          * Under phase 2, network 0 means "the network".  We take "the
    348          * network" to mean the network the control block is bound to.
    349          * If the control block is not bound, there is an error.
    350          */
    351 	if (sat->sat_addr.s_net == ATADDR_ANYNET
    352 	    && sat->sat_addr.s_node != ATADDR_ANYNODE) {
    353 		if (ddp->ddp_lsat.sat_port == ATADDR_ANYPORT) {
    354 			return EADDRNOTAVAIL;
    355 		}
    356 		hintnet = ddp->ddp_lsat.sat_addr.s_net;
    357 	}
    358 	ro = &ddp->ddp_route;
    359 	/*
    360          * If we've got an old route for this pcb, check that it is valid.
    361          * If we've changed our address, we may have an old "good looking"
    362          * route here.  Attempt to detect it.
    363          */
    364 	if ((rt = rtcache_validate(ro)) != NULL ||
    365 	    (rt = rtcache_update(ro, 1)) != NULL) {
    366 		if (hintnet) {
    367 			net = hintnet;
    368 		} else {
    369 			net = sat->sat_addr.s_net;
    370 		}
    371 		if ((ifp = rt->rt_ifp) != NULL) {
    372 			TAILQ_FOREACH(aa, &at_ifaddr, aa_list) {
    373 				if (aa->aa_ifp == ifp &&
    374 				    ntohs(net) >= ntohs(aa->aa_firstnet) &&
    375 				    ntohs(net) <= ntohs(aa->aa_lastnet)) {
    376 					break;
    377 				}
    378 			}
    379 		} else
    380 			aa = NULL;
    381 		cdst = satocsat(rtcache_getdst(ro));
    382 		if (aa == NULL || (cdst->sat_addr.s_net !=
    383 		    (hintnet ? hintnet : sat->sat_addr.s_net) ||
    384 		    cdst->sat_addr.s_node != sat->sat_addr.s_node)) {
    385 			rtcache_free(ro);
    386 			rt = NULL;
    387 		}
    388 	}
    389 	/*
    390          * If we've got no route for this interface, try to find one.
    391          */
    392 	if (rt == NULL) {
    393 		union {
    394 			struct sockaddr		dst;
    395 			struct sockaddr_at	dsta;
    396 		} u;
    397 
    398 		sockaddr_at_init(&u.dsta, &sat->sat_addr, 0);
    399 		if (hintnet)
    400 			u.dsta.sat_addr.s_net = hintnet;
    401 		rt = rtcache_lookup(ro, &u.dst);
    402 	}
    403 	/*
    404          * Make sure any route that we have has a valid interface.
    405          */
    406 	if (rt != NULL && (ifp = rt->rt_ifp) != NULL) {
    407 		TAILQ_FOREACH(aa, &at_ifaddr, aa_list) {
    408 			if (aa->aa_ifp == ifp)
    409 				break;
    410 		}
    411 	} else
    412 		aa = NULL;
    413 	if (aa == NULL)
    414 		return ENETUNREACH;
    415 	ddp->ddp_fsat = *sat;
    416 	if (ddp->ddp_lsat.sat_port == ATADDR_ANYPORT)
    417 		return at_pcbsetaddr(ddp, NULL, l);
    418 	return 0;
    419 }
    420 
    421 static void
    422 at_pcbdisconnect(struct ddpcb *ddp)
    423 {
    424 	ddp->ddp_fsat.sat_addr.s_net = ATADDR_ANYNET;
    425 	ddp->ddp_fsat.sat_addr.s_node = ATADDR_ANYNODE;
    426 	ddp->ddp_fsat.sat_port = ATADDR_ANYPORT;
    427 }
    428 
    429 static int
    430 at_pcballoc(struct socket *so)
    431 {
    432 	struct ddpcb   *ddp;
    433 
    434 	ddp = malloc(sizeof(*ddp), M_PCB, M_WAITOK|M_ZERO);
    435 	if (!ddp)
    436 		panic("at_pcballoc");
    437 	ddp->ddp_lsat.sat_port = ATADDR_ANYPORT;
    438 
    439 	ddp->ddp_next = ddpcb;
    440 	ddp->ddp_prev = NULL;
    441 	ddp->ddp_pprev = NULL;
    442 	ddp->ddp_pnext = NULL;
    443 	if (ddpcb) {
    444 		ddpcb->ddp_prev = ddp;
    445 	}
    446 	ddpcb = ddp;
    447 
    448 	ddp->ddp_socket = so;
    449 	so->so_pcb = (void *) ddp;
    450 #ifdef MBUFTRACE
    451 	so->so_rcv.sb_mowner = &atalk_rx_mowner;
    452 	so->so_snd.sb_mowner = &atalk_tx_mowner;
    453 #endif
    454 	return 0;
    455 }
    456 
    457 static void
    458 at_pcbdetach(struct socket *so, struct ddpcb *ddp)
    459 {
    460 	soisdisconnected(so);
    461 	so->so_pcb = 0;
    462 	/* sofree drops the lock */
    463 	sofree(so);
    464 	mutex_enter(softnet_lock);
    465 
    466 	/* remove ddp from ddp_ports list */
    467 	if (ddp->ddp_lsat.sat_port != ATADDR_ANYPORT &&
    468 	    ddp_ports[ddp->ddp_lsat.sat_port - 1] != NULL) {
    469 		if (ddp->ddp_pprev != NULL) {
    470 			ddp->ddp_pprev->ddp_pnext = ddp->ddp_pnext;
    471 		} else {
    472 			ddp_ports[ddp->ddp_lsat.sat_port - 1] = ddp->ddp_pnext;
    473 		}
    474 		if (ddp->ddp_pnext != NULL) {
    475 			ddp->ddp_pnext->ddp_pprev = ddp->ddp_pprev;
    476 		}
    477 	}
    478 	rtcache_free(&ddp->ddp_route);
    479 	if (ddp->ddp_prev) {
    480 		ddp->ddp_prev->ddp_next = ddp->ddp_next;
    481 	} else {
    482 		ddpcb = ddp->ddp_next;
    483 	}
    484 	if (ddp->ddp_next) {
    485 		ddp->ddp_next->ddp_prev = ddp->ddp_prev;
    486 	}
    487 	free(ddp, M_PCB);
    488 }
    489 
    490 /*
    491  * For the moment, this just find the pcb with the correct local address.
    492  * In the future, this will actually do some real searching, so we can use
    493  * the sender's address to do de-multiplexing on a single port to many
    494  * sockets (pcbs).
    495  */
    496 struct ddpcb   *
    497 ddp_search(
    498     struct sockaddr_at *from,
    499     struct sockaddr_at *to,
    500     struct at_ifaddr *aa)
    501 {
    502 	struct ddpcb   *ddp;
    503 
    504 	/*
    505          * Check for bad ports.
    506          */
    507 	if (to->sat_port < ATPORT_FIRST || to->sat_port >= ATPORT_LAST)
    508 		return NULL;
    509 
    510 	/*
    511          * Make sure the local address matches the sent address.  What about
    512          * the interface?
    513          */
    514 	for (ddp = ddp_ports[to->sat_port - 1]; ddp; ddp = ddp->ddp_pnext) {
    515 		/* XXX should we handle 0.YY? */
    516 
    517 		/* XXXX.YY to socket on destination interface */
    518 		if (to->sat_addr.s_net == ddp->ddp_lsat.sat_addr.s_net &&
    519 		    to->sat_addr.s_node == ddp->ddp_lsat.sat_addr.s_node) {
    520 			break;
    521 		}
    522 		/* 0.255 to socket on receiving interface */
    523 		if (to->sat_addr.s_node == ATADDR_BCAST &&
    524 		    (to->sat_addr.s_net == 0 ||
    525 		    to->sat_addr.s_net == ddp->ddp_lsat.sat_addr.s_net) &&
    526 		ddp->ddp_lsat.sat_addr.s_net == AA_SAT(aa)->sat_addr.s_net) {
    527 			break;
    528 		}
    529 		/* XXXX.0 to socket on destination interface */
    530 		if (to->sat_addr.s_net == aa->aa_firstnet &&
    531 		    to->sat_addr.s_node == 0 &&
    532 		    ntohs(ddp->ddp_lsat.sat_addr.s_net) >=
    533 		    ntohs(aa->aa_firstnet) &&
    534 		    ntohs(ddp->ddp_lsat.sat_addr.s_net) <=
    535 		    ntohs(aa->aa_lastnet)) {
    536 			break;
    537 		}
    538 	}
    539 	return (ddp);
    540 }
    541 
    542 /*
    543  * Initialize all the ddp & appletalk stuff
    544  */
    545 void
    546 ddp_init(void)
    547 {
    548 
    549 	ddpstat_percpu = percpu_alloc(sizeof(uint64_t) * DDP_NSTATS);
    550 
    551 	TAILQ_INIT(&at_ifaddr);
    552 	atintrq1.ifq_maxlen = IFQ_MAXLEN;
    553 	atintrq2.ifq_maxlen = IFQ_MAXLEN;
    554 
    555 	MOWNER_ATTACH(&atalk_tx_mowner);
    556 	MOWNER_ATTACH(&atalk_rx_mowner);
    557 	MOWNER_ATTACH(&aarp_mowner);
    558 }
    559 
    560 #if 0
    561 static void
    562 ddp_clean(void)
    563 {
    564 	struct ddpcb   *ddp;
    565 
    566 	for (ddp = ddpcb; ddp; ddp = ddp->ddp_next)
    567 		at_pcbdetach(ddp->ddp_socket, ddp);
    568 }
    569 #endif
    570 
    571 static int
    572 sysctl_net_atalk_ddp_stats(SYSCTLFN_ARGS)
    573 {
    574 
    575 	return (NETSTAT_SYSCTL(ddpstat_percpu, DDP_NSTATS));
    576 }
    577 
    578 /*
    579  * Sysctl for DDP variables.
    580  */
    581 SYSCTL_SETUP(sysctl_net_atalk_ddp_setup, "sysctl net.atalk.ddp subtree setup")
    582 {
    583 
    584 	sysctl_createv(clog, 0, NULL, NULL,
    585 		       CTLFLAG_PERMANENT,
    586 		       CTLTYPE_NODE, "net", NULL,
    587 		       NULL, 0, NULL, 0,
    588 		       CTL_NET, CTL_EOL);
    589 	sysctl_createv(clog, 0, NULL, NULL,
    590 		       CTLFLAG_PERMANENT,
    591 		       CTLTYPE_NODE, "atalk", NULL,
    592 		       NULL, 0, NULL, 0,
    593 		       CTL_NET, PF_APPLETALK, CTL_EOL);
    594 	sysctl_createv(clog, 0, NULL, NULL,
    595 		       CTLFLAG_PERMANENT,
    596 		       CTLTYPE_NODE, "ddp",
    597 		       SYSCTL_DESCR("DDP related settings"),
    598 		       NULL, 0, NULL, 0,
    599 		       CTL_NET, PF_APPLETALK, ATPROTO_DDP, CTL_EOL);
    600 
    601 	sysctl_createv(clog, 0, NULL, NULL,
    602 		       CTLFLAG_PERMANENT,
    603 		       CTLTYPE_STRUCT, "stats",
    604 		       SYSCTL_DESCR("DDP statistics"),
    605 		       sysctl_net_atalk_ddp_stats, 0, NULL, 0,
    606 		       CTL_NET, PF_APPLETALK, ATPROTO_DDP, CTL_CREATE,
    607 		       CTL_EOL);
    608 }
    609