[apple/xnu.git] / bsd / netat / at.c

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 *	Copyright (c) 1998 Apple Computer, Inc. 
 */

/*	at.c
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/ioctl.h>
#include <sys/errno.h>
#include <sys/malloc.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/file.h>
#include <sys/kauth.h>

#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <net/dlil.h>

#include <netat/appletalk.h>
#include <netat/sysglue.h>
#include <netat/at_pcb.h>
#include <netat/at_var.h>
#include <netat/ddp.h>
#include <netat/nbp.h>
#include <netat/routing_tables.h>
#include <netat/debug.h>

#include <sys/kern_event.h>

extern int at_ioctl(struct atpcb *, u_long, caddr_t, int fromKernel);
extern int routerStart(at_kern_err_t *);
extern void elap_offline(at_ifaddr_t *);
extern at_ifaddr_t *find_ifID(char *);
extern at_nvestr_t *getRTRLocalZone(zone_usage_t *);
extern int setLocalZones(at_nvestr_t *, int);

extern int xpatcnt;
extern at_ifaddr_t at_interfaces[];
extern at_ifaddr_t *ifID_home;
extern TAILQ_HEAD(name_registry, _nve_) name_registry;
extern int nve_lock;

struct  etalk_addr      etalk_multicast_addr = {
  {0x09, 0x00, 0x07, 0xff, 0xff, 0xff}};
struct  etalk_addr      ttalk_multicast_addr = {
  {0xC0, 0x00, 0x40, 0x00, 0x00, 0x00}};

/* called only in router mode */
static int set_zones(zone_usage_t *ifz)

/* 1. adds zone to table
   2. looks up each route entry from zone list
   3. sets zone bit in each route entry

   returns  0 if successful
	    errno if error occurred
*/
{
	int i;
	at_ifaddr_t *ifID;
	short zno;
	RT_entry *rte;

	zno = zt_add_zone(ifz->zone_name.str, ifz->zone_name.len);

	if (zno == ZT_MAXEDOUT) {
		dPrintf(D_M_ELAP, D_L_ERROR, ("set_zones: error: table full\n"));
		return(ENOSPC);
	}
	if (ifz->zone_home) {
		ifID_home->ifZoneName = ifz->zone_name;
		ifID_home->ifDefZone = zno;
	}

	for (i=0; i<IF_TOTAL_MAX; i++)  {
		if (ifz->zone_iflist.at_if[i][0]) {  
			if ((ifID = find_ifID(ifz->zone_iflist.at_if[i]))) {
				rte = rt_blookup(ifID->ifThisCableEnd);
				if (!rte) {
					dPrintf(D_M_ELAP, D_L_ERROR,
						("set_zones: error: can't find route\n"));
				} else {
					zt_set_zmap(zno, rte->ZoneBitMap); 

					/* if first zone for this I/F, 
					   make default */
					if (!ifID->ifDefZone)
						ifID->ifDefZone = zno;
				}
			}
		}
	}

	return(0);
} /* set_zones */

/*
  * Generic internet control operations (ioctl's).
  * ifp is 0 if not an interface-specific ioctl.
  */

int
at_control(so, cmd, data, ifp)
     struct socket *so;
     u_long cmd;
     caddr_t data;
     struct ifnet *ifp;
{
	struct ifreq *ifr = (struct ifreq *)data;
	int pat_id = 0, error = 0;
	struct proc *p = current_proc();       
	at_ifaddr_t *ifID = 0;
	struct ifaddr *ifa;
	struct sockaddr_dl *sdl;

    if ((cmd & 0xffff) == 0xff99) {
		u_long 	fixed_command;
		/* *** this is a temporary hack to get at_send_to_dev() to
		   work with BSD-style sockets instead of the special purpose 
		   system calls, ATsocket() and ATioctl().
		   *** */
		fixed_command = _IOW(0, 0xff99, user_addr_t); 
		if ((error = at_ioctl((struct atpcb *)so->so_pcb, fixed_command, data, 0))) {
		  if (((struct atpcb *)so->so_pcb)->proto != ATPROTO_LAP) {
		    ((struct atpcb *)so->so_pcb)->proto = ATPROTO_LAP;
		    error = at_ioctl((struct atpcb *)so->so_pcb, fixed_command, data , 0);
		  }
		}
		return(error);

		/* *** processing should be
		   return(EINVAL);
		   *** */
	}
        /*
	 * Find address for this interface, if it exists.
	 */
	if (ifp)
		for (pat_id = 0; pat_id < xpatcnt; pat_id++)
		  if (at_interfaces[pat_id].aa_ifp == ifp) {
			ifID = &at_interfaces[pat_id];
			break;
		  }
	
	switch (cmd) {

	case AIOCGETSTATE:
	  {
	  	at_state_t *global_state = (at_state_t *)data;

		*global_state = at_state;
		return(0);
		break;
	  }

	case AIOCGETIFCFG:
	  {
	  	at_if_cfg_t *cfgp = (at_if_cfg_t *)data;

		ifID = 0;
		if ((at_state.flags & AT_ST_STARTED) &&
		    ifID_home) {
			if (strlen(cfgp->ifr_name)) {
				TAILQ_FOREACH(ifID, &at_ifQueueHd, aa_link) {
					if (!strncmp(ifID->ifName, cfgp->ifr_name, 
						     strlen(ifID->ifName)))
						break;
				}
			} else {
				ifID = ifID_home;
				strncpy(cfgp->ifr_name, ifID->ifName, 
					sizeof(ifID->ifName));
			}
			if  (ifID && ifID->ifState != LAP_OFFLINE) {
				cfgp->flags = ifID->ifFlags;
				/* put the IF state into the low order 
				   bits of flags */
				cfgp->flags |= (ifID->ifState & LAP_STATE_MASK);
				cfgp->node = ifID->ifThisNode;
				cfgp->router = ifID->ifARouter;
				cfgp->netStart = ifID->ifThisCableStart;
				cfgp->netEnd = ifID->ifThisCableEnd;
				cfgp->zonename = ifID->ifZoneName;
				return(0);
			} else
				return(EINVAL);
		} else
			return(ENOTREADY);
		break;
	  }

	case AIOCSETDEFZONE:
	  {
	  	at_def_zone_t *defzonep = (at_def_zone_t *)data;

		/* check for root access */
		if (error = suser(kauth_cred_get(), 0))
			return(EACCES);

		ifID = 0;
		if ((at_state.flags & AT_ST_STARTED) && ifID_home) {
			if (strlen(defzonep->ifr_name)) {
			    TAILQ_FOREACH(ifID, &at_ifQueueHd, aa_link) {
				if (!strncmp(ifID->ifName, defzonep->ifr_name, 
					     strlen(ifID->ifName)))
				    break;
			    }
			} else {
				ifID = ifID_home;
				strncpy(defzonep->ifr_name, ifID->ifName, 
					sizeof(ifID->ifName));
			}

			/* In routing mode the default zone is only set for the 
			   default interface. */
			if (ROUTING_MODE && (ifID != ifID_home))
				return(EINVAL);

			if  (ifID && ifID->ifState != LAP_OFFLINE) {
				if (zonename_equal(&ifID->ifZoneName, 
						   &defzonep->zonename)) 
					return(0);
				else {
					/* check the zone name */
					if (MULTIPORT_MODE) {
					  short zno;
					  at_ifnames_t ifs_in_zone;

					  if (!(zno = zt_find_zname(&defzonep->zonename)))
					    return(EINVAL);

					  getIfUsage(zno-1, &ifs_in_zone);
					  if (!ifs_in_zone.at_if[ifID->ifPort]) 
					    return(EINVAL);
					  ifID->ifDefZone = zno+1;
					} else {
					  int i;
					  at_nvestr_t *zone;

					  for (i = 0, zone = getSPLocalZone(i); 
					       zone; 
					       i++, zone = getSPLocalZone(i)) {
					    if (zonename_equal(zone, 
							       &defzonep->zonename))
					      break;
					  }
					  if (!zone)
					    return(EINVAL);
					}
					ifID->ifZoneName = defzonep->zonename;
					(void)regDefaultZone(ifID);

					/* AppleTalk zone was changed. Send event with zone info. */
					atalk_post_msg(ifID->aa_ifp, KEV_ATALK_ZONEUPDATED, 0, &(ifID->ifZoneName));

					return(0);
				}
			} else
				return(EINVAL);
		} else
			return(ENOTREADY);
		break;
	  }

	case AIOCREGLOCALZN:
	  {
		at_nvestr_t *zone = (at_nvestr_t *)data;

		if (!(at_state.flags & AT_ST_STARTED) || !ifID_home)
			return(ENOTREADY);

		if (MULTIPORT_MODE)
			return(EINVAL);

		return(setLocalZones(zone, zone->len));

		break;
	  }
	case AIOCSETZNUSAGE:
		if (!(at_state.flags & AT_ST_STARTED) || !ifID_home)
			return(ENOTREADY);

		if (!ROUTING_MODE)
			return(EINVAL);

		return(set_zones((zone_usage_t *)data));

		break;

	case AIOCGETZNUSAGE:
		if (!(at_state.flags & AT_ST_STARTED) || !ifID_home)
			return(ENOTREADY);

		if (!MULTIPORT_MODE)
			return(EINVAL);

		if (getRTRLocalZone((zone_usage_t *)data))
			return(0);
		else
			return(ENOENT);
		break;

	case AIOCNBPREG:
	  {
	  	at_nbp_reg_t *nbpP = (at_nbp_reg_t *)data;
		nve_entry_t nve;
		int error2;

		if (!(at_state.flags & AT_ST_STARTED) || !ifID_home)
			return(ENOTREADY);

		/* multihoming mode */
		if (MULTIHOME_MODE) {
			return(nbp_mh_reg(nbpP));
		}

		/* single port mode or router mode */
		if (nbp_fillin_nve(&nbpP->name, &nve) != 0) {
			/* bad tuple... */
			return(EINVAL);
		}

		/* In routing mode when the zone is specified, we need to 
		   find an interface on which the specified zone is seeded, so
		   that the zone multicast will be plausible. */
		if (ROUTING_MODE && !(DEFAULT_ZONE(&nve.zone))) {
		        /* find first segment (interface) which is seeded for 
			   this zone */
			int finished = FALSE;
			int zno;
			at_ifnames_t ifs_in_zone;
			if (!(zno = zt_find_zname(&nve.zone))) {
				return(EINVAL);
			}
			getIfUsage(zno-1, &ifs_in_zone);

			TAILQ_FOREACH(ifID, &at_ifQueueHd, aa_link) {
				if (!ifs_in_zone.at_if[ifID->ifPort]) 
						/* zone doesn't match */
					continue;
				else {
					finished = TRUE;
					break;
				}
			}
			if (!finished)
				return(EINVAL);
		} else 
			ifID = ifID_home;

		nve.address.net = ifID->ifThisNode.s_net;
		nve.address.node = ifID->ifThisNode.s_node;
		nve.address.socket = nbpP->addr.socket;
		nve.ddptype = nbpP->ddptype;

		if (nbp_find_nve(&nve))
			return(EADDRNOTAVAIL);

		/* Normal case; no tuple found for this name, so insert
		 * this tuple in the registry and return ok response.
		 */
		if ((error2 = nbp_new_nve_entry(&nve, ifID)) == 0) {
			nbpP->addr.net = ifID->ifThisNode.s_net;
			nbpP->addr.node = ifID->ifThisNode.s_node;
			nbpP->unique_nbp_id = nve.unique_nbp_id;
		}

		return(error2);
		break;
	  }

	case AIOCNBPREMOVE:
	  {
	  	at_nbp_reg_t *nbpP = (at_nbp_reg_t *)data;
		nve_entry_t    *nve_entry, nve;

		if (!(at_state.flags & AT_ST_STARTED))
			return(ENOTREADY);

		/* delete by id */
		if (nbpP->unique_nbp_id) {
			TAILQ_FOREACH(nve_entry, &name_registry, nve_link) {
				if (nve_entry->unique_nbp_id == nbpP->unique_nbp_id) {
					/* Found a match! */
					nbp_delete_entry(nve_entry);
					return(0);
				}
			}
			return(EADDRNOTAVAIL);
		}

		/* delete by entity */
		if (nbp_fillin_nve(&nbpP->name, &nve) != 0) {
			/* bad tuple... */
			return(EINVAL);
		}

		if (MULTIHOME_MODE && DEFAULT_ZONE(&nbpP->name.zone)) {
			/* if mhome & *, remove nve from all default zones */
			int found = FALSE;	/* if any found & deleted */

			TAILQ_FOREACH(ifID, &at_ifQueueHd, aa_link) {
				nve.zone = ifID->ifZoneName;
				nve.zone_hash = nbp_strhash(&nve.zone);
				if ((nve_entry = nbp_find_nve(&nve)) == NULL) 
					continue;

				nbp_delete_entry(nve_entry);
				found = TRUE;
			}
			if (found) 
				return(0);
			else
				return(EADDRNOTAVAIL);
		}

		if ((nve_entry = nbp_find_nve(&nve)) == NULL)
			/* Can't find the tuple we're looking for, send error*/
			return(EADDRNOTAVAIL);

		/* Normal case; tuple found for this name, so delete
		 * the entry from the registry and return ok response.
		 */
		nbp_delete_entry(nve_entry);
		return(0);

		break;
	  }

	case AIOCSETROUTER:
	  {
	  	at_router_params_t *rt = (at_router_params_t *)data;

		/* check for root access */
		if (error = suser(kauth_cred_get(), 0))
			return(EACCES);

		/* when in routing/multihome mode the AIOCSETROUTER IOCTL 
		   is done first */
		if (at_state.flags & AT_ST_STARTED)
	    		return(EALREADY);

		/* Setup the routing & zip table size for the router */
		if (rt->rtmp_table_sz >= RT_MIN && rt->rtmp_table_sz <= RT_MAX)
                	RT_maxentry = rt->rtmp_table_sz;
		else
	                RT_maxentry = RT_DEFAULT;

		if (rt->zone_table_sz >= ZT_MIN && rt->zone_table_sz <= ZT_MAX)
			ZT_maxentry = rt->zone_table_sz;
		else
                	ZT_maxentry = ZT_DEFAULT;

		if (rt_table_init() == ENOBUFS)
			return(ENOBUFS);

		if (rt->router_mix)
			RouterMix = (int)rt->router_mix;
		else
			RouterMix = RT_MIX_DEFAULT;

		add_ddp_handler(RTMP_SOCKET, rtmp_router_input);

		if (rt->multihome)
                	at_state.flags |= AT_ST_MULTIHOME;
		else
			at_state.flags |= AT_ST_ROUTER;
		break;
	  }
	case AIOCSTARTROUTER:
	  {
	  	at_kern_err_t *keP = (at_kern_err_t *)data;

		/* check for root access */
		if (suser(kauth_cred_get(), 0))
			return(EACCES);

		if (!(at_state.flags & AT_ST_STARTED))
			return(ENOTREADY);

		bzero(keP, sizeof(at_kern_err_t));
		error = routerStart(keP);

		break;
	  }
	case AIOCGETROUTER:
	  {
	  	at_router_params_t *rt = (at_router_params_t *)data;

		if (!(at_state.flags & AT_ST_STARTED))
			return(ENOTREADY);

		rt->multihome = (MULTIHOME_MODE)? 1: 0;
		rt->rtmp_table_sz = RT_maxentry;
		rt->zone_table_sz = ZT_maxentry;
		rt->router_mix = RouterMix;

		break;
	  }
	case AIOCSTOPATALK:
	{
		int *count_only = (int *)data,
		    ret;

		/* check for root access */
		if (error = suser(kauth_cred_get(), 0))
			return(EACCES);

		ret = ddp_shutdown(*count_only);
		
		if (*count_only != 0) 
		{
			*count_only = ret;
			return(0);
		}
		else
		{
			if (ret == 0)
			{
				/* AppleTalk was successfully shut down. Send event. */
				atalk_post_msg(0, KEV_ATALK_DISABLED, 0, 0);
				return 0;
			}
			else
				return EBUSY;
		}

		break;
	}

	case SIOCSIFADDR:
		/* check for root access */
		if (error = suser(kauth_cred_get(), 0))
			error = EACCES;
		else if (ifID)
			error = EEXIST;
		else {
			int s;
			if (xpatcnt == 0) {
				at_state.flags |= AT_ST_STARTING;
				ddp_brt_init();
			}

			/* *** find an empty entry *** */
			ifID = &at_interfaces[xpatcnt];
			bzero((caddr_t)ifID, sizeof(at_ifaddr_t));
			strncpy(ifID->ifName, ifr->ifr_name, sizeof(ifID->ifName));

			ifID->aa_ifp = ifp;
			ifa = &ifID->aa_ifa;
			ifnet_lock_exclusive(ifp);
			TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 
				if ((sdl = (struct sockaddr_dl *)ifa->ifa_addr) &&
				      (sdl->sdl_family == AF_LINK)) {
				    bcopy(LLADDR(sdl), ifID->xaddr, sizeof(ifID->xaddr));
#ifdef APPLETALK_DEBUG
				    kprintf("SIOCSIFADDR: local enet address is %x.%x.%x.%x.%x.%x\n", 
					    ifID->xaddr[0], ifID->xaddr[1], 
					    ifID->xaddr[2], ifID->xaddr[3], 
					    ifID->xaddr[4], ifID->xaddr[5]);
#endif
				    break;
				  }

			/* attach the AppleTalk address to the ifnet structure */
			ifa = &ifID->aa_ifa;
			ifa->ifa_addr = (struct sockaddr *)&ifID->ifNodeAddress;
			ifID->ifNodeAddress.sat_len = sizeof(struct sockaddr_at);
			ifID->ifNodeAddress.sat_family =  AF_APPLETALK;
			/* the address itself will be filled in when ifThisNode
			   is set */
			if_attach_ifa(ifp, ifa);
			ifnet_lock_done(ifp);

			switch (ifp->if_type) {
			case IFT_ETHER:
                        case IFT_L2VLAN:
                        case IFT_IEEE8023ADLAG: /* bonded ethernet */
				ether_attach_at(ifp);
				error = 0;
				ifID->cable_multicast_addr = etalk_multicast_addr;

				xpatcnt++;
				break;
			case IFT_FDDI:
				ifID->cable_multicast_addr = etalk_multicast_addr;
				ddp_bit_reverse(&ifID->cable_multicast_addr);
				xpatcnt++;
				break;
			case IFT_ISO88025: /* token ring */	
				ifID->cable_multicast_addr = ttalk_multicast_addr;
				ddp_bit_reverse(&ifID->cable_multicast_addr);

				xpatcnt++;
				break;
			default:
				error = EINVAL;
			}
		}
	  break;

	/* complete the initialization started in SIOCSIFADDR */
	case AIOCSIFADDR:
	{
		at_if_cfg_t *cfgp = (at_if_cfg_t *)data;

		if (!(at_state.flags & AT_ST_STARTING))
			return(ENOTREADY);
 
		if (!(ifID = find_ifID(cfgp->ifr_name)))
			return(EINVAL);
		
		return(lap_online(ifID, cfgp));
		break;
	}

#ifdef NOT_YET
	/* *** this can't be added until AT can handle dynamic addition and
	       deletion of interfaces *** */
	case SIOCDIFADDR:
		/* check for root access */
		if (error = suser(kauth_cred_get(), 0))
			error = EACCES;
		else if (!ifID) 
			error = EINVAL;
		else
			elap_offline(ifID);
		break;
#endif

    case SIOCSETOT: {
        struct atpcb	*at_pcb, *clonedat_pcb;
        int				cloned_fd = *(int *)data;

        at_pcb = sotoatpcb(so);
        
        /* let's make sure it's either -1 or a valid file descriptor */
        if (cloned_fd != -1) {
            struct socket	*cloned_so;
			error = file_socket(cloned_fd, &cloned_so);
            if (error)
                break;
            clonedat_pcb = sotoatpcb(cloned_so);
        } else {
            clonedat_pcb = NULL;
        }

        if (clonedat_pcb == NULL) {
            at_pcb->ddp_flags |= DDPFLG_STRIPHDR;
        } else {
            at_pcb->ddp_flags = clonedat_pcb->ddp_flags;
        }
		file_drop(cloned_fd);
        break;
    }
        
	default:
		if (ifp == 0 || ifp->if_ioctl == 0)
			return (EOPNOTSUPP);
		return dlil_ioctl(0, ifp, cmd, (caddr_t) data);
	}

	return(error);
}

/* From dlil_post_msg() */
void atalk_post_msg(struct ifnet *ifp, u_long event_code, struct at_addr *address, at_nvestr_t *zone) 
{
	struct kev_atalk_data  	at_event_data;
	struct kev_msg  		ev_msg;

	ev_msg.vendor_code    = KEV_VENDOR_APPLE;
	ev_msg.kev_class      = KEV_NETWORK_CLASS;
	ev_msg.kev_subclass   = KEV_ATALK_SUBCLASS;
	ev_msg.event_code 	  = event_code;
	
	bzero(&at_event_data, sizeof(struct kev_atalk_data));
    
	if (ifp != 0) {
		strncpy(&at_event_data.link_data.if_name[0], ifp->if_name, IFNAMSIZ);
		at_event_data.link_data.if_family = ifp->if_family;
		at_event_data.link_data.if_unit   = (unsigned long) ifp->if_unit;
	}
	
	if (address != 0) {
		at_event_data.node_data.address = *address;
	}
	else if (zone != 0) {
		at_event_data.node_data.zone = *zone;
	}
    
	ev_msg.dv[0].data_length = sizeof(struct kev_atalk_data);
	ev_msg.dv[0].data_ptr    = &at_event_data;	
	ev_msg.dv[1].data_length = 0;
	
	kev_post_msg(&ev_msg);
}
Commit	Line	Data
1c79356b A	1	/*
	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
37839358 A	6	* The contents of this file constitute Original Code as defined in and
	7	* are subject to the Apple Public Source License Version 1.1 (the
	8	* "License"). You may not use this file except in compliance with the
	9	* License. Please obtain a copy of the License at
	10	* http://www.apple.com/publicsource and read it before using this file.
1c79356b	11	*
37839358 A	12	* This Original Code and all software distributed under the License are
37839358 A	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
1c79356b A	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
1c79356b A	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
37839358 A	16	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	17	* License for the specific language governing rights and limitations
	18	* under the License.
1c79356b A	19	*
	20	* @APPLE_LICENSE_HEADER_END@
	21	*/
	22	/*
	23	* Copyright (c) 1998 Apple Computer, Inc.
	24	*/
	25
	26	/* at.c
	27	*/
	28
	29	#include <sys/param.h>
	30	#include <sys/systm.h>
	31	#include <sys/ioctl.h>
	32	#include <sys/errno.h>
	33	#include <sys/malloc.h>
	34	#include <sys/socket.h>
	35	#include <sys/socketvar.h>
	36	#include <sys/file.h>
91447636	37	#include <sys/kauth.h>
1c79356b A	38
	39	#include <net/if.h>
	40	#include <net/if_dl.h>
	41	#include <net/if_types.h>
1c79356b A	42	#include <net/dlil.h>
	43
	44	#include <netat/appletalk.h>
	45	#include <netat/sysglue.h>
	46	#include <netat/at_pcb.h>
	47	#include <netat/at_var.h>
	48	#include <netat/ddp.h>
	49	#include <netat/nbp.h>
	50	#include <netat/routing_tables.h>
	51	#include <netat/debug.h>
	52
9bccf70c A	53	#include <sys/kern_event.h>
9bccf70c A	54
0b4e3aa0	55	extern int at_ioctl(struct atpcb *, u_long, caddr_t, int fromKernel);
1c79356b A	56	extern int routerStart(at_kern_err_t *);
	57	extern void elap_offline(at_ifaddr_t *);
	58	extern at_ifaddr_t find_ifID(char );
	59	extern at_nvestr_t getRTRLocalZone(zone_usage_t );
	60	extern int setLocalZones(at_nvestr_t *, int);
	61
	62	extern int xpatcnt;
	63	extern at_ifaddr_t at_interfaces[];
	64	extern at_ifaddr_t *ifID_home;
	65	extern TAILQ_HEAD(name_registry, _nve_) name_registry;
	66	extern int nve_lock;
	67
	68	struct etalk_addr etalk_multicast_addr = {
	69	{0x09, 0x00, 0x07, 0xff, 0xff, 0xff}};
	70	struct etalk_addr ttalk_multicast_addr = {
	71	{0xC0, 0x00, 0x40, 0x00, 0x00, 0x00}};
	72
	73	/* called only in router mode */
c0fea474	74	static int set_zones(zone_usage_t *ifz)
1c79356b A	75
	76	/* 1. adds zone to table
	77	2. looks up each route entry from zone list
	78	3. sets zone bit in each route entry
	79
	80	returns 0 if successful
	81	errno if error occurred
	82	*/
	83	{
	84	int i;
	85	at_ifaddr_t *ifID;
	86	short zno;
	87	RT_entry *rte;
	88
	89	zno = zt_add_zone(ifz->zone_name.str, ifz->zone_name.len);
	90
	91	if (zno == ZT_MAXEDOUT) {
	92	dPrintf(D_M_ELAP, D_L_ERROR, ("set_zones: error: table full\n"));
	93	return(ENOSPC);
	94	}
	95	if (ifz->zone_home) {
	96	ifID_home->ifZoneName = ifz->zone_name;
	97	ifID_home->ifDefZone = zno;
	98	}
	99
	100	for (i=0; i<IF_TOTAL_MAX; i++) {
	101	if (ifz->zone_iflist.at_if[i][0]) {
	102	if ((ifID = find_ifID(ifz->zone_iflist.at_if[i]))) {
	103	rte = rt_blookup(ifID->ifThisCableEnd);
	104	if (!rte) {
	105	dPrintf(D_M_ELAP, D_L_ERROR,
	106	("set_zones: error: can't find route\n"));
	107	} else {
	108	zt_set_zmap(zno, rte->ZoneBitMap);
	109
	110	/* if first zone for this I/F,
	111	make default */
	112	if (!ifID->ifDefZone)
	113	ifID->ifDefZone = zno;
	114	}
	115	}
	116	}
	117	}
	118
	119	return(0);
	120	} /* set_zones */
	121
	122	/*
	123	* Generic internet control operations (ioctl's).
	124	* ifp is 0 if not an interface-specific ioctl.
	125	*/
	126
91447636 A	127	int
91447636 A	128	at_control(so, cmd, data, ifp)
1c79356b A	129	struct socket *so;
	130	u_long cmd;
	131	caddr_t data;
	132	struct ifnet *ifp;
	133	{
	134	struct ifreq ifr = (struct ifreq )data;
	135	int pat_id = 0, error = 0;
	136	struct proc *p = current_proc();
	137	at_ifaddr_t *ifID = 0;
	138	struct ifaddr *ifa;
	139	struct sockaddr_dl *sdl;
	140
91447636 A	141	if ((cmd & 0xffff) == 0xff99) {
91447636 A	142	u_long fixed_command;
1c79356b A	143	/* *** this is a temporary hack to get at_send_to_dev() to
	144	work with BSD-style sockets instead of the special purpose
	145	system calls, ATsocket() and ATioctl().
	146	*** */
91447636 A	147	fixed_command = _IOW(0, 0xff99, user_addr_t);
91447636 A	148	if ((error = at_ioctl((struct atpcb *)so->so_pcb, fixed_command, data, 0))) {
1c79356b A	149	if (((struct atpcb *)so->so_pcb)->proto != ATPROTO_LAP) {
1c79356b A	150	((struct atpcb *)so->so_pcb)->proto = ATPROTO_LAP;
91447636	151	error = at_ioctl((struct atpcb *)so->so_pcb, fixed_command, data , 0);
1c79356b A	152	}
	153	}
	154	return(error);
	155
	156	/* *** processing should be
	157	return(EINVAL);
	158	*** */
	159	}
	160	/*
	161	* Find address for this interface, if it exists.
	162	*/
	163	if (ifp)
	164	for (pat_id = 0; pat_id < xpatcnt; pat_id++)
	165	if (at_interfaces[pat_id].aa_ifp == ifp) {
	166	ifID = &at_interfaces[pat_id];
	167	break;
	168	}
	169
	170	switch (cmd) {
	171
	172	case AIOCGETSTATE:
	173	{
	174	at_state_t global_state = (at_state_t )data;
	175
	176	*global_state = at_state;
	177	return(0);
	178	break;
	179	}
	180
	181	case AIOCGETIFCFG:
	182	{
	183	at_if_cfg_t cfgp = (at_if_cfg_t )data;
	184
	185	ifID = 0;
	186	if ((at_state.flags & AT_ST_STARTED) &&
	187	ifID_home) {
	188	if (strlen(cfgp->ifr_name)) {
	189	TAILQ_FOREACH(ifID, &at_ifQueueHd, aa_link) {
	190	if (!strncmp(ifID->ifName, cfgp->ifr_name,
	191	strlen(ifID->ifName)))
	192	break;
	193	}
	194	} else {
	195	ifID = ifID_home;
	196	strncpy(cfgp->ifr_name, ifID->ifName,
	197	sizeof(ifID->ifName));
	198	}
	199	if (ifID && ifID->ifState != LAP_OFFLINE) {
	200	cfgp->flags = ifID->ifFlags;
	201	/* put the IF state into the low order
	202	bits of flags */
	203	cfgp->flags \|= (ifID->ifState & LAP_STATE_MASK);
	204	cfgp->node = ifID->ifThisNode;
	205	cfgp->router = ifID->ifARouter;
	206	cfgp->netStart = ifID->ifThisCableStart;
	207	cfgp->netEnd = ifID->ifThisCableEnd;
	208	cfgp->zonename = ifID->ifZoneName;
	209	return(0);
	210	} else
	211	return(EINVAL);
	212	} else
	213	return(ENOTREADY);
	214	break;
	215	}
216
217	case AIOCSETDEFZONE:
218	{
219	at_def_zone_t defzonep = (at_def_zone_t )data;
220
221	/* check for root access */
91447636	222	if (error = suser(kauth_cred_get(), 0))
1c79356b A	223	return(EACCES);
	224
	225	ifID = 0;
	226	if ((at_state.flags & AT_ST_STARTED) && ifID_home) {
	227	if (strlen(defzonep->ifr_name)) {
	228	TAILQ_FOREACH(ifID, &at_ifQueueHd, aa_link) {
	229	if (!strncmp(ifID->ifName, defzonep->ifr_name,
	230	strlen(ifID->ifName)))
	231	break;
	232	}
	233	} else {
	234	ifID = ifID_home;
	235	strncpy(defzonep->ifr_name, ifID->ifName,
	236	sizeof(ifID->ifName));
	237	}
	238
	239	/* In routing mode the default zone is only set for the
	240	default interface. */
	241	if (ROUTING_MODE && (ifID != ifID_home))
	242	return(EINVAL);
	243
	244	if (ifID && ifID->ifState != LAP_OFFLINE) {
	245	if (zonename_equal(&ifID->ifZoneName,
	246	&defzonep->zonename))
	247	return(0);
	248	else {
	249	/* check the zone name */
	250	if (MULTIPORT_MODE) {
	251	short zno;
9bccf70c	252	at_ifnames_t ifs_in_zone;
1c79356b A	253
	254	if (!(zno = zt_find_zname(&defzonep->zonename)))
	255	return(EINVAL);
	256
9bccf70c A	257	getIfUsage(zno-1, &ifs_in_zone);
9bccf70c A	258	if (!ifs_in_zone.at_if[ifID->ifPort])
1c79356b A	259	return(EINVAL);
	260	ifID->ifDefZone = zno+1;
	261	} else {
	262	int i;
	263	at_nvestr_t *zone;
	264
	265	for (i = 0, zone = getSPLocalZone(i);
	266	zone;
	267	i++, zone = getSPLocalZone(i)) {
	268	if (zonename_equal(zone,
	269	&defzonep->zonename))
	270	break;
	271	}
	272	if (!zone)
	273	return(EINVAL);
	274	}
	275	ifID->ifZoneName = defzonep->zonename;
	276	(void)regDefaultZone(ifID);
9bccf70c A	277
	278	/* AppleTalk zone was changed. Send event with zone info. */
	279	atalk_post_msg(ifID->aa_ifp, KEV_ATALK_ZONEUPDATED, 0, &(ifID->ifZoneName));
	280
1c79356b A	281	return(0);
	282	}
	283	} else
	284	return(EINVAL);
	285	} else
	286	return(ENOTREADY);
	287	break;
	288	}
	289
	290	case AIOCREGLOCALZN:
	291	{
	292	at_nvestr_t zone = (at_nvestr_t )data;
	293
	294	if (!(at_state.flags & AT_ST_STARTED) \|\| !ifID_home)
	295	return(ENOTREADY);
	296
	297	if (MULTIPORT_MODE)
	298	return(EINVAL);
	299
	300	return(setLocalZones(zone, zone->len));
	301
	302	break;
	303	}
	304	case AIOCSETZNUSAGE:
	305	if (!(at_state.flags & AT_ST_STARTED) \|\| !ifID_home)
	306	return(ENOTREADY);
	307
	308	if (!ROUTING_MODE)
	309	return(EINVAL);
	310
	311	return(set_zones((zone_usage_t *)data));
	312
	313	break;
	314
	315	case AIOCGETZNUSAGE:
	316	if (!(at_state.flags & AT_ST_STARTED) \|\| !ifID_home)
	317	return(ENOTREADY);
	318
	319	if (!MULTIPORT_MODE)
	320	return(EINVAL);
	321
	322	if (getRTRLocalZone((zone_usage_t *)data))
	323	return(0);
	324	else
	325	return(ENOENT);
	326	break;
	327
	328	case AIOCNBPREG:
	329	{
	330	at_nbp_reg_t nbpP = (at_nbp_reg_t )data;
	331	nve_entry_t nve;
91447636	332	int error2;
1c79356b A	333
	334	if (!(at_state.flags & AT_ST_STARTED) \|\| !ifID_home)
	335	return(ENOTREADY);
	336
	337	/* multihoming mode */
	338	if (MULTIHOME_MODE) {
	339	return(nbp_mh_reg(nbpP));
	340	}
	341
	342	/* single port mode or router mode */
	343	if (nbp_fillin_nve(&nbpP->name, &nve) != 0) {
	344	/* bad tuple... */
	345	return(EINVAL);
	346	}
	347
	348	/* In routing mode when the zone is specified, we need to
	349	find an interface on which the specified zone is seeded, so
	350	that the zone multicast will be plausible. */
	351	if (ROUTING_MODE && !(DEFAULT_ZONE(&nve.zone))) {
	352	/* find first segment (interface) which is seeded for
	353	this zone */
	354	int finished = FALSE;
	355	int zno;
9bccf70c	356	at_ifnames_t ifs_in_zone;
1c79356b A	357	if (!(zno = zt_find_zname(&nve.zone))) {
	358	return(EINVAL);
	359	}
9bccf70c	360	getIfUsage(zno-1, &ifs_in_zone);
1c79356b A	361
1c79356b A	362	TAILQ_FOREACH(ifID, &at_ifQueueHd, aa_link) {
9bccf70c	363	if (!ifs_in_zone.at_if[ifID->ifPort])
1c79356b A	364	/* zone doesn't match */
1c79356b A	365	continue;
9bccf70c	366	else {
1c79356b	367	finished = TRUE;
9bccf70c A	368	break;
9bccf70c A	369	}
1c79356b A	370	}
	371	if (!finished)
	372	return(EINVAL);
	373	} else
	374	ifID = ifID_home;
	375
	376	nve.address.net = ifID->ifThisNode.s_net;
	377	nve.address.node = ifID->ifThisNode.s_node;
	378	nve.address.socket = nbpP->addr.socket;
	379	nve.ddptype = nbpP->ddptype;
	380
	381	if (nbp_find_nve(&nve))
	382	return(EADDRNOTAVAIL);
	383
	384	/* Normal case; no tuple found for this name, so insert
	385	* this tuple in the registry and return ok response.
	386	*/
91447636	387	if ((error2 = nbp_new_nve_entry(&nve, ifID)) == 0) {
1c79356b A	388	nbpP->addr.net = ifID->ifThisNode.s_net;
	389	nbpP->addr.node = ifID->ifThisNode.s_node;
	390	nbpP->unique_nbp_id = nve.unique_nbp_id;
	391	}
1c79356b	392
91447636	393	return(error2);
1c79356b A	394	break;
	395	}
	396
	397	case AIOCNBPREMOVE:
	398	{
	399	at_nbp_reg_t nbpP = (at_nbp_reg_t )data;
	400	nve_entry_t *nve_entry, nve;
	401
	402	if (!(at_state.flags & AT_ST_STARTED))
	403	return(ENOTREADY);
	404
	405	/* delete by id */
	406	if (nbpP->unique_nbp_id) {
1c79356b A	407	TAILQ_FOREACH(nve_entry, &name_registry, nve_link) {
	408	if (nve_entry->unique_nbp_id == nbpP->unique_nbp_id) {
	409	/* Found a match! */
	410	nbp_delete_entry(nve_entry);
1c79356b A	411	return(0);
	412	}
	413	}
1c79356b A	414	return(EADDRNOTAVAIL);
	415	}
	416
	417	/* delete by entity */
	418	if (nbp_fillin_nve(&nbpP->name, &nve) != 0) {
	419	/* bad tuple... */
	420	return(EINVAL);
	421	}
	422
	423	if (MULTIHOME_MODE && DEFAULT_ZONE(&nbpP->name.zone)) {
	424	/* if mhome & , remove nve from all default zones /
	425	int found = FALSE; /* if any found & deleted */
	426
	427	TAILQ_FOREACH(ifID, &at_ifQueueHd, aa_link) {
	428	nve.zone = ifID->ifZoneName;
	429	nve.zone_hash = nbp_strhash(&nve.zone);
	430	if ((nve_entry = nbp_find_nve(&nve)) == NULL)
	431	continue;
	432
1c79356b	433	nbp_delete_entry(nve_entry);
1c79356b A	434	found = TRUE;
	435	}
	436	if (found)
	437	return(0);
	438	else
	439	return(EADDRNOTAVAIL);
	440	}
	441
	442	if ((nve_entry = nbp_find_nve(&nve)) == NULL)
	443	/* Can't find the tuple we're looking for, send error*/
	444	return(EADDRNOTAVAIL);
	445
	446	/* Normal case; tuple found for this name, so delete
	447	* the entry from the registry and return ok response.
	448	*/
1c79356b	449	nbp_delete_entry(nve_entry);
1c79356b A	450	return(0);
	451
	452	break;
	453	}
	454
	455	case AIOCSETROUTER:
	456	{
	457	at_router_params_t rt = (at_router_params_t )data;
	458
	459	/* check for root access */
91447636	460	if (error = suser(kauth_cred_get(), 0))
1c79356b A	461	return(EACCES);
	462
	463	/* when in routing/multihome mode the AIOCSETROUTER IOCTL
	464	is done first */
	465	if (at_state.flags & AT_ST_STARTED)
	466	return(EALREADY);
	467
	468	/* Setup the routing & zip table size for the router */
	469	if (rt->rtmp_table_sz >= RT_MIN && rt->rtmp_table_sz <= RT_MAX)
	470	RT_maxentry = rt->rtmp_table_sz;
	471	else
	472	RT_maxentry = RT_DEFAULT;
	473
	474	if (rt->zone_table_sz >= ZT_MIN && rt->zone_table_sz <= ZT_MAX)
	475	ZT_maxentry = rt->zone_table_sz;
	476	else
	477	ZT_maxentry = ZT_DEFAULT;
	478
	479	if (rt_table_init() == ENOBUFS)
	480	return(ENOBUFS);
	481
	482	if (rt->router_mix)
	483	RouterMix = (int)rt->router_mix;
	484	else
	485	RouterMix = RT_MIX_DEFAULT;
	486
	487	add_ddp_handler(RTMP_SOCKET, rtmp_router_input);
	488
	489	if (rt->multihome)
	490	at_state.flags \|= AT_ST_MULTIHOME;
	491	else
	492	at_state.flags \|= AT_ST_ROUTER;
	493	break;
	494	}
	495	case AIOCSTARTROUTER:
	496	{
	497	at_kern_err_t keP = (at_kern_err_t )data;
	498
	499	/* check for root access */
91447636	500	if (suser(kauth_cred_get(), 0))
1c79356b A	501	return(EACCES);
	502
	503	if (!(at_state.flags & AT_ST_STARTED))
	504	return(ENOTREADY);
	505
	506	bzero(keP, sizeof(at_kern_err_t));
	507	error = routerStart(keP);
	508
	509	break;
	510	}
	511	case AIOCGETROUTER:
	512	{
	513	at_router_params_t rt = (at_router_params_t )data;
	514
	515	if (!(at_state.flags & AT_ST_STARTED))
	516	return(ENOTREADY);
	517
	518	rt->multihome = (MULTIHOME_MODE)? 1: 0;
	519	rt->rtmp_table_sz = RT_maxentry;
	520	rt->zone_table_sz = ZT_maxentry;
	521	rt->router_mix = RouterMix;
	522
	523	break;
	524	}
	525	case AIOCSTOPATALK:
9bccf70c A	526	{
9bccf70c A	527	int count_only = (int )data,
1c79356b A	528	ret;
	529
	530	/* check for root access */
91447636	531	if (error = suser(kauth_cred_get(), 0))
1c79356b A	532	return(EACCES);
	533
	534	ret = ddp_shutdown(*count_only);
9bccf70c A	535
	536	if (*count_only != 0)
	537	{
1c79356b A	538	*count_only = ret;
1c79356b A	539	return(0);
9bccf70c A	540	}
	541	else
	542	{
	543	if (ret == 0)
	544	{
	545	/* AppleTalk was successfully shut down. Send event. */
	546	atalk_post_msg(0, KEV_ATALK_DISABLED, 0, 0);
	547	return 0;
	548	}
	549	else
	550	return EBUSY;
	551	}
	552
1c79356b	553	break;
9bccf70c	554	}
1c79356b A	555
	556	case SIOCSIFADDR:
	557	/* check for root access */
91447636	558	if (error = suser(kauth_cred_get(), 0))
1c79356b A	559	error = EACCES;
	560	else if (ifID)
	561	error = EEXIST;
	562	else {
	563	int s;
	564	if (xpatcnt == 0) {
9bccf70c	565	at_state.flags \|= AT_ST_STARTING;
1c79356b A	566	ddp_brt_init();
	567	}
	568
	569	/* * find an empty entry * */
	570	ifID = &at_interfaces[xpatcnt];
	571	bzero((caddr_t)ifID, sizeof(at_ifaddr_t));
	572	strncpy(ifID->ifName, ifr->ifr_name, sizeof(ifID->ifName));
	573
	574	ifID->aa_ifp = ifp;
	575	ifa = &ifID->aa_ifa;
91447636	576	ifnet_lock_exclusive(ifp);
1c79356b A	577	TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
	578	if ((sdl = (struct sockaddr_dl *)ifa->ifa_addr) &&
	579	(sdl->sdl_family == AF_LINK)) {
	580	bcopy(LLADDR(sdl), ifID->xaddr, sizeof(ifID->xaddr));
	581	#ifdef APPLETALK_DEBUG
	582	kprintf("SIOCSIFADDR: local enet address is %x.%x.%x.%x.%x.%x\n",
	583	ifID->xaddr[0], ifID->xaddr[1],
	584	ifID->xaddr[2], ifID->xaddr[3],
	585	ifID->xaddr[4], ifID->xaddr[5]);
	586	#endif
	587	break;
	588	}
	589
	590	/* attach the AppleTalk address to the ifnet structure */
	591	ifa = &ifID->aa_ifa;
	592	ifa->ifa_addr = (struct sockaddr *)&ifID->ifNodeAddress;
	593	ifID->ifNodeAddress.sat_len = sizeof(struct sockaddr_at);
	594	ifID->ifNodeAddress.sat_family = AF_APPLETALK;
	595	/* the address itself will be filled in when ifThisNode
	596	is set */
91447636 A	597	if_attach_ifa(ifp, ifa);
91447636 A	598	ifnet_lock_done(ifp);
1c79356b A	599
	600	switch (ifp->if_type) {
	601	case IFT_ETHER:
91447636 A	602	case IFT_L2VLAN:
	603	case IFT_IEEE8023ADLAG: /* bonded ethernet */
	604	ether_attach_at(ifp);
1c79356b A	605	error = 0;
	606	ifID->cable_multicast_addr = etalk_multicast_addr;
	607
	608	xpatcnt++;
	609	break;
	610	case IFT_FDDI:
	611	ifID->cable_multicast_addr = etalk_multicast_addr;
	612	ddp_bit_reverse(&ifID->cable_multicast_addr);
	613	xpatcnt++;
	614	break;
	615	case IFT_ISO88025: /* token ring */
	616	ifID->cable_multicast_addr = ttalk_multicast_addr;
	617	ddp_bit_reverse(&ifID->cable_multicast_addr);
	618
	619	xpatcnt++;
	620	break;
	621	default:
	622	error = EINVAL;
	623	}
	624	}
	625	break;
	626
	627	/* complete the initialization started in SIOCSIFADDR */
	628	case AIOCSIFADDR:
9bccf70c	629	{
1c79356b A	630	at_if_cfg_t cfgp = (at_if_cfg_t )data;
1c79356b A	631
9bccf70c	632	if (!(at_state.flags & AT_ST_STARTING))
1c79356b A	633	return(ENOTREADY);
	634
	635	if (!(ifID = find_ifID(cfgp->ifr_name)))
	636	return(EINVAL);
9bccf70c	637
1c79356b A	638	return(lap_online(ifID, cfgp));
1c79356b A	639	break;
9bccf70c	640	}
1c79356b A	641
	642	#ifdef NOT_YET
	643	/* *** this can't be added until AT can handle dynamic addition and
	644	deletion of interfaces *** */
	645	case SIOCDIFADDR:
	646	/* check for root access */
91447636	647	if (error = suser(kauth_cred_get(), 0))
1c79356b A	648	error = EACCES;
	649	else if (!ifID)
	650	error = EINVAL;
	651	else
	652	elap_offline(ifID);
	653	break;
	654	#endif
	655
	656	case SIOCSETOT: {
1c79356b A	657	struct atpcb at_pcb, clonedat_pcb;
	658	int cloned_fd = (int )data;
	659
1c79356b A	660	at_pcb = sotoatpcb(so);
	661
	662	/* let's make sure it's either -1 or a valid file descriptor */
	663	if (cloned_fd != -1) {
	664	struct socket *cloned_so;
91447636	665	error = file_socket(cloned_fd, &cloned_so);
c0fea474	666	if (error)
1c79356b	667	break;
1c79356b A	668	clonedat_pcb = sotoatpcb(cloned_so);
	669	} else {
	670	clonedat_pcb = NULL;
	671	}
	672
	673	if (clonedat_pcb == NULL) {
	674	at_pcb->ddp_flags \|= DDPFLG_STRIPHDR;
	675	} else {
	676	at_pcb->ddp_flags = clonedat_pcb->ddp_flags;
	677	}
91447636	678	file_drop(cloned_fd);
1c79356b A	679	break;
	680	}
	681
	682	default:
	683	if (ifp == 0 \|\| ifp->if_ioctl == 0)
	684	return (EOPNOTSUPP);
	685	return dlil_ioctl(0, ifp, cmd, (caddr_t) data);
	686	}
	687
	688	return(error);
	689	}
9bccf70c A	690
	691	/* From dlil_post_msg() */
	692	void atalk_post_msg(struct ifnet ifp, u_long event_code, struct at_addr address, at_nvestr_t *zone)
	693	{
	694	struct kev_atalk_data at_event_data;
	695	struct kev_msg ev_msg;
	696
	697	ev_msg.vendor_code = KEV_VENDOR_APPLE;
	698	ev_msg.kev_class = KEV_NETWORK_CLASS;
	699	ev_msg.kev_subclass = KEV_ATALK_SUBCLASS;
	700	ev_msg.event_code = event_code;
	701
	702	bzero(&at_event_data, sizeof(struct kev_atalk_data));
	703
	704	if (ifp != 0) {
	705	strncpy(&at_event_data.link_data.if_name[0], ifp->if_name, IFNAMSIZ);
	706	at_event_data.link_data.if_family = ifp->if_family;
	707	at_event_data.link_data.if_unit = (unsigned long) ifp->if_unit;
	708	}
	709
	710	if (address != 0) {
	711	at_event_data.node_data.address = *address;
	712	}
	713	else if (zone != 0) {
	714	at_event_data.node_data.zone = *zone;
	715	}
	716
	717	ev_msg.dv[0].data_length = sizeof(struct kev_atalk_data);
	718	ev_msg.dv[0].data_ptr = &at_event_data;
	719	ev_msg.dv[1].data_length = 0;
	720
	721	kev_post_msg(&ev_msg);
	722	}