[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 <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(ifz)
	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 == 0x2000ff99) {
		/* *** 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().
		   *** */
		if ((error = at_ioctl((struct atpcb *)so->so_pcb, cmd, 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, cmd, 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(p->p_ucred, &p->p_acflag))
			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 error;

		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.
		 */
		ATDISABLE(nve_lock, NVE_LOCK);
		if ((error = 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;
		}
		ATENABLE(nve_lock, NVE_LOCK);

		return(error);
		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) {
			ATDISABLE(nve_lock, NVE_LOCK);
			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);
					ATENABLE(nve_lock, NVE_LOCK);
					return(0);
				}
			}
			ATENABLE(nve_lock, NVE_LOCK);
			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;

				ATDISABLE(nve_lock, NVE_LOCK);
				nbp_delete_entry(nve_entry);
				ATENABLE(nve_lock, NVE_LOCK);
				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.
		 */
		ATDISABLE(nve_lock, NVE_LOCK);
		nbp_delete_entry(nve_entry);
		ATENABLE(nve_lock, NVE_LOCK);
		return(0);

		break;
	  }

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

		/* check for root access */
		if (error = suser(p->p_ucred, &p->p_acflag))
			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(p->p_ucred, &p->p_acflag))
			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(p->p_ucred, &p->p_acflag))
			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(p->p_ucred, &p->p_acflag))
			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;
			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 */
			s = splnet();
			TAILQ_INSERT_TAIL(&ifp->if_addrhead, ifa, ifa_link);
			splx(s);

			switch (ifp->if_type) {
			case IFT_ETHER:
				ether_attach_at(ifp, &ifID->at_dl_tag, 
						&ifID->aarp_dl_tag);
				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(p->p_ucred, &p->p_acflag))
			error = EACCES;
		else if (!ifID) 
			error = EINVAL;
		else
			elap_offline(ifID);
		break;
#endif

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

        s = splnet();		/* XXX */
        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;
            struct file     *cloned_fp;
            error = getsock(p->p_fd, cloned_fd, &cloned_fp);
            if (error){
                splx(s);	/* XXX */
                break;
            }
            cloned_so = (struct socket *)cloned_fp->f_data;
            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;
        }
        splx(s);		/* XXX */
        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	*
e5568f75 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	*
e5568f75 A	12	* This Original Code and all software distributed under the License are
e5568f75 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,
e5568f75 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>
	37
	38	#include <net/if.h>
	39	#include <net/if_dl.h>
	40	#include <net/if_types.h>
1c79356b A	41	#include <net/dlil.h>
	42
	43	#include <netat/appletalk.h>
	44	#include <netat/sysglue.h>
	45	#include <netat/at_pcb.h>
	46	#include <netat/at_var.h>
	47	#include <netat/ddp.h>
	48	#include <netat/nbp.h>
	49	#include <netat/routing_tables.h>
	50	#include <netat/debug.h>
	51
9bccf70c A	52	#include <sys/kern_event.h>
9bccf70c A	53
0b4e3aa0	54	extern int at_ioctl(struct atpcb *, u_long, caddr_t, int fromKernel);
1c79356b A	55	extern int routerStart(at_kern_err_t *);
	56	extern void elap_offline(at_ifaddr_t *);
	57	extern at_ifaddr_t find_ifID(char );
	58	extern at_nvestr_t getRTRLocalZone(zone_usage_t );
	59	extern int setLocalZones(at_nvestr_t *, int);
	60
	61	extern int xpatcnt;
	62	extern at_ifaddr_t at_interfaces[];
	63	extern at_ifaddr_t *ifID_home;
	64	extern TAILQ_HEAD(name_registry, _nve_) name_registry;
	65	extern int nve_lock;
	66
	67	struct etalk_addr etalk_multicast_addr = {
	68	{0x09, 0x00, 0x07, 0xff, 0xff, 0xff}};
	69	struct etalk_addr ttalk_multicast_addr = {
	70	{0xC0, 0x00, 0x40, 0x00, 0x00, 0x00}};
	71
	72	/* called only in router mode */
	73	static int set_zones(ifz)
	74	zone_usage_t *ifz;
	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
127	int at_control(so, cmd, data, ifp)
128	struct socket *so;
129	u_long cmd;
130	caddr_t data;
131	struct ifnet *ifp;
132	{
133	struct ifreq ifr = (struct ifreq )data;
134	int pat_id = 0, error = 0;
135	struct proc *p = current_proc();
136	at_ifaddr_t *ifID = 0;
137	struct ifaddr *ifa;
138	struct sockaddr_dl *sdl;
139
140	if (cmd == 0x2000ff99) {
141	/* *** this is a temporary hack to get at_send_to_dev() to
142	work with BSD-style sockets instead of the special purpose
143	system calls, ATsocket() and ATioctl().
144	*** */
0b4e3aa0	145	if ((error = at_ioctl((struct atpcb *)so->so_pcb, cmd, data, 0))) {
1c79356b A	146	if (((struct atpcb *)so->so_pcb)->proto != ATPROTO_LAP) {
1c79356b A	147	((struct atpcb *)so->so_pcb)->proto = ATPROTO_LAP;
0b4e3aa0	148	error = at_ioctl((struct atpcb *)so->so_pcb, cmd, data, 0);
1c79356b A	149	}
	150	}
	151	return(error);
	152
	153	/* *** processing should be
	154	return(EINVAL);
	155	*** */
	156	}
	157	/*
	158	* Find address for this interface, if it exists.
	159	*/
	160	if (ifp)
	161	for (pat_id = 0; pat_id < xpatcnt; pat_id++)
	162	if (at_interfaces[pat_id].aa_ifp == ifp) {
	163	ifID = &at_interfaces[pat_id];
	164	break;
	165	}
	166
	167	switch (cmd) {
	168
	169	case AIOCGETSTATE:
	170	{
	171	at_state_t global_state = (at_state_t )data;
	172
	173	*global_state = at_state;
	174	return(0);
	175	break;
	176	}
	177
	178	case AIOCGETIFCFG:
	179	{
	180	at_if_cfg_t cfgp = (at_if_cfg_t )data;
	181
	182	ifID = 0;
	183	if ((at_state.flags & AT_ST_STARTED) &&
	184	ifID_home) {
	185	if (strlen(cfgp->ifr_name)) {
	186	TAILQ_FOREACH(ifID, &at_ifQueueHd, aa_link) {
	187	if (!strncmp(ifID->ifName, cfgp->ifr_name,
	188	strlen(ifID->ifName)))
	189	break;
	190	}
	191	} else {
	192	ifID = ifID_home;
	193	strncpy(cfgp->ifr_name, ifID->ifName,
	194	sizeof(ifID->ifName));
	195	}
	196	if (ifID && ifID->ifState != LAP_OFFLINE) {
	197	cfgp->flags = ifID->ifFlags;
	198	/* put the IF state into the low order
	199	bits of flags */
	200	cfgp->flags \|= (ifID->ifState & LAP_STATE_MASK);
	201	cfgp->node = ifID->ifThisNode;
	202	cfgp->router = ifID->ifARouter;
	203	cfgp->netStart = ifID->ifThisCableStart;
	204	cfgp->netEnd = ifID->ifThisCableEnd;
	205	cfgp->zonename = ifID->ifZoneName;
	206	return(0);
	207	} else
	208	return(EINVAL);
	209	} else
	210	return(ENOTREADY);
	211	break;
	212	}
213
214	case AIOCSETDEFZONE:
215	{
216	at_def_zone_t defzonep = (at_def_zone_t )data;
217
218	/* check for root access */
219	if (error = suser(p->p_ucred, &p->p_acflag))
220	return(EACCES);
221
222	ifID = 0;
223	if ((at_state.flags & AT_ST_STARTED) && ifID_home) {
224	if (strlen(defzonep->ifr_name)) {
225	TAILQ_FOREACH(ifID, &at_ifQueueHd, aa_link) {
226	if (!strncmp(ifID->ifName, defzonep->ifr_name,
227	strlen(ifID->ifName)))
228	break;
229	}
230	} else {
231	ifID = ifID_home;
232	strncpy(defzonep->ifr_name, ifID->ifName,
233	sizeof(ifID->ifName));
234	}
235
236	/* In routing mode the default zone is only set for the
237	default interface. */
238	if (ROUTING_MODE && (ifID != ifID_home))
239	return(EINVAL);
240
241	if (ifID && ifID->ifState != LAP_OFFLINE) {
242	if (zonename_equal(&ifID->ifZoneName,
243	&defzonep->zonename))
244	return(0);
245	else {
246	/* check the zone name */
247	if (MULTIPORT_MODE) {
248	short zno;
9bccf70c	249	at_ifnames_t ifs_in_zone;
1c79356b A	250
	251	if (!(zno = zt_find_zname(&defzonep->zonename)))
	252	return(EINVAL);
	253
9bccf70c A	254	getIfUsage(zno-1, &ifs_in_zone);
9bccf70c A	255	if (!ifs_in_zone.at_if[ifID->ifPort])
1c79356b A	256	return(EINVAL);
	257	ifID->ifDefZone = zno+1;
	258	} else {
	259	int i;
	260	at_nvestr_t *zone;
	261
	262	for (i = 0, zone = getSPLocalZone(i);
	263	zone;
	264	i++, zone = getSPLocalZone(i)) {
	265	if (zonename_equal(zone,
	266	&defzonep->zonename))
	267	break;
	268	}
	269	if (!zone)
	270	return(EINVAL);
	271	}
	272	ifID->ifZoneName = defzonep->zonename;
	273	(void)regDefaultZone(ifID);
9bccf70c A	274
	275	/* AppleTalk zone was changed. Send event with zone info. */
	276	atalk_post_msg(ifID->aa_ifp, KEV_ATALK_ZONEUPDATED, 0, &(ifID->ifZoneName));
	277
1c79356b A	278	return(0);
	279	}
	280	} else
	281	return(EINVAL);
	282	} else
	283	return(ENOTREADY);
	284	break;
	285	}
	286
	287	case AIOCREGLOCALZN:
	288	{
	289	at_nvestr_t zone = (at_nvestr_t )data;
	290
	291	if (!(at_state.flags & AT_ST_STARTED) \|\| !ifID_home)
	292	return(ENOTREADY);
	293
	294	if (MULTIPORT_MODE)
	295	return(EINVAL);
	296
	297	return(setLocalZones(zone, zone->len));
	298
	299	break;
	300	}
	301	case AIOCSETZNUSAGE:
	302	if (!(at_state.flags & AT_ST_STARTED) \|\| !ifID_home)
	303	return(ENOTREADY);
	304
	305	if (!ROUTING_MODE)
	306	return(EINVAL);
	307
	308	return(set_zones((zone_usage_t *)data));
	309
	310	break;
	311
	312	case AIOCGETZNUSAGE:
	313	if (!(at_state.flags & AT_ST_STARTED) \|\| !ifID_home)
	314	return(ENOTREADY);
	315
	316	if (!MULTIPORT_MODE)
	317	return(EINVAL);
	318
	319	if (getRTRLocalZone((zone_usage_t *)data))
	320	return(0);
	321	else
	322	return(ENOENT);
	323	break;
	324
	325	case AIOCNBPREG:
	326	{
	327	at_nbp_reg_t nbpP = (at_nbp_reg_t )data;
	328	nve_entry_t nve;
	329	int error;
	330
	331	if (!(at_state.flags & AT_ST_STARTED) \|\| !ifID_home)
	332	return(ENOTREADY);
	333
	334	/* multihoming mode */
	335	if (MULTIHOME_MODE) {
	336	return(nbp_mh_reg(nbpP));
	337	}
	338
	339	/* single port mode or router mode */
	340	if (nbp_fillin_nve(&nbpP->name, &nve) != 0) {
	341	/* bad tuple... */
342	return(EINVAL);
343	}
344
345	/* In routing mode when the zone is specified, we need to
346	find an interface on which the specified zone is seeded, so
347	that the zone multicast will be plausible. */
348	if (ROUTING_MODE && !(DEFAULT_ZONE(&nve.zone))) {
349	/* find first segment (interface) which is seeded for
350	this zone */
351	int finished = FALSE;
352	int zno;
9bccf70c	353	at_ifnames_t ifs_in_zone;
1c79356b A	354	if (!(zno = zt_find_zname(&nve.zone))) {
	355	return(EINVAL);
	356	}
9bccf70c	357	getIfUsage(zno-1, &ifs_in_zone);
1c79356b A	358
1c79356b A	359	TAILQ_FOREACH(ifID, &at_ifQueueHd, aa_link) {
9bccf70c	360	if (!ifs_in_zone.at_if[ifID->ifPort])
1c79356b A	361	/* zone doesn't match */
1c79356b A	362	continue;
9bccf70c	363	else {
1c79356b	364	finished = TRUE;
9bccf70c A	365	break;
9bccf70c A	366	}
1c79356b A	367	}
	368	if (!finished)
	369	return(EINVAL);
	370	} else
	371	ifID = ifID_home;
	372
	373	nve.address.net = ifID->ifThisNode.s_net;
	374	nve.address.node = ifID->ifThisNode.s_node;
	375	nve.address.socket = nbpP->addr.socket;
	376	nve.ddptype = nbpP->ddptype;
	377
	378	if (nbp_find_nve(&nve))
	379	return(EADDRNOTAVAIL);
	380
	381	/* Normal case; no tuple found for this name, so insert
	382	* this tuple in the registry and return ok response.
	383	*/
	384	ATDISABLE(nve_lock, NVE_LOCK);
	385	if ((error = nbp_new_nve_entry(&nve, ifID)) == 0) {
	386	nbpP->addr.net = ifID->ifThisNode.s_net;
	387	nbpP->addr.node = ifID->ifThisNode.s_node;
	388	nbpP->unique_nbp_id = nve.unique_nbp_id;
	389	}
	390	ATENABLE(nve_lock, NVE_LOCK);
	391
	392	return(error);
	393	break;
	394	}
	395
	396	case AIOCNBPREMOVE:
	397	{
	398	at_nbp_reg_t nbpP = (at_nbp_reg_t )data;
	399	nve_entry_t *nve_entry, nve;
	400
	401	if (!(at_state.flags & AT_ST_STARTED))
	402	return(ENOTREADY);
	403
	404	/* delete by id */
	405	if (nbpP->unique_nbp_id) {
	406	ATDISABLE(nve_lock, NVE_LOCK);
	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);
	411	ATENABLE(nve_lock, NVE_LOCK);
	412	return(0);
	413	}
	414	}
	415	ATENABLE(nve_lock, NVE_LOCK);
	416	return(EADDRNOTAVAIL);
	417	}
	418
	419	/* delete by entity */
	420	if (nbp_fillin_nve(&nbpP->name, &nve) != 0) {
	421	/* bad tuple... */
	422	return(EINVAL);
	423	}
	424
	425	if (MULTIHOME_MODE && DEFAULT_ZONE(&nbpP->name.zone)) {
	426	/* if mhome & , remove nve from all default zones /
	427	int found = FALSE; /* if any found & deleted */
	428
	429	TAILQ_FOREACH(ifID, &at_ifQueueHd, aa_link) {
	430	nve.zone = ifID->ifZoneName;
431	nve.zone_hash = nbp_strhash(&nve.zone);
432	if ((nve_entry = nbp_find_nve(&nve)) == NULL)
433	continue;
434
435	ATDISABLE(nve_lock, NVE_LOCK);
436	nbp_delete_entry(nve_entry);
437	ATENABLE(nve_lock, NVE_LOCK);
438	found = TRUE;
439	}
440	if (found)
441	return(0);
442	else
443	return(EADDRNOTAVAIL);
444	}
445
446	if ((nve_entry = nbp_find_nve(&nve)) == NULL)
447	/* Can't find the tuple we're looking for, send error*/
448	return(EADDRNOTAVAIL);
449
450	/* Normal case; tuple found for this name, so delete
451	* the entry from the registry and return ok response.
452	*/
453	ATDISABLE(nve_lock, NVE_LOCK);
454	nbp_delete_entry(nve_entry);
455	ATENABLE(nve_lock, NVE_LOCK);
456	return(0);
457
458	break;
459	}
460
461	case AIOCSETROUTER:
462	{
463	at_router_params_t rt = (at_router_params_t )data;
464
465	/* check for root access */
466	if (error = suser(p->p_ucred, &p->p_acflag))
467	return(EACCES);
468
469	/* when in routing/multihome mode the AIOCSETROUTER IOCTL
470	is done first */
471	if (at_state.flags & AT_ST_STARTED)
472	return(EALREADY);
473
474	/* Setup the routing & zip table size for the router */
475	if (rt->rtmp_table_sz >= RT_MIN && rt->rtmp_table_sz <= RT_MAX)
476	RT_maxentry = rt->rtmp_table_sz;
477	else
478	RT_maxentry = RT_DEFAULT;
479
480	if (rt->zone_table_sz >= ZT_MIN && rt->zone_table_sz <= ZT_MAX)
481	ZT_maxentry = rt->zone_table_sz;
482	else
483	ZT_maxentry = ZT_DEFAULT;
484
485	if (rt_table_init() == ENOBUFS)
486	return(ENOBUFS);
487
488	if (rt->router_mix)
489	RouterMix = (int)rt->router_mix;
490	else
491	RouterMix = RT_MIX_DEFAULT;
492
493	add_ddp_handler(RTMP_SOCKET, rtmp_router_input);
494
495	if (rt->multihome)
496	at_state.flags \|= AT_ST_MULTIHOME;
497	else
498	at_state.flags \|= AT_ST_ROUTER;
499	break;
500	}
501	case AIOCSTARTROUTER:
502	{
503	at_kern_err_t keP = (at_kern_err_t )data;
504
505	/* check for root access */
506	if (suser(p->p_ucred, &p->p_acflag))
507	return(EACCES);
508
509	if (!(at_state.flags & AT_ST_STARTED))
510	return(ENOTREADY);
511
512	bzero(keP, sizeof(at_kern_err_t));
513	error = routerStart(keP);
514
515	break;
516	}
517	case AIOCGETROUTER:
518	{
519	at_router_params_t rt = (at_router_params_t )data;
520
521	if (!(at_state.flags & AT_ST_STARTED))
522	return(ENOTREADY);
523
524	rt->multihome = (MULTIHOME_MODE)? 1: 0;
525	rt->rtmp_table_sz = RT_maxentry;
526	rt->zone_table_sz = ZT_maxentry;
527	rt->router_mix = RouterMix;
528
529	break;
530	}
531	case AIOCSTOPATALK:
9bccf70c A	532	{
9bccf70c A	533	int count_only = (int )data,
1c79356b A	534	ret;
	535
	536	/* check for root access */
	537	if (error = suser(p->p_ucred, &p->p_acflag))
	538	return(EACCES);
	539
	540	ret = ddp_shutdown(*count_only);
9bccf70c A	541
	542	if (*count_only != 0)
	543	{
1c79356b A	544	*count_only = ret;
1c79356b A	545	return(0);
9bccf70c A	546	}
	547	else
	548	{
	549	if (ret == 0)
	550	{
	551	/* AppleTalk was successfully shut down. Send event. */
	552	atalk_post_msg(0, KEV_ATALK_DISABLED, 0, 0);
	553	return 0;
	554	}
	555	else
	556	return EBUSY;
	557	}
	558
1c79356b	559	break;
9bccf70c	560	}
1c79356b A	561
	562	case SIOCSIFADDR:
	563	/* check for root access */
	564	if (error = suser(p->p_ucred, &p->p_acflag))
	565	error = EACCES;
	566	else if (ifID)
	567	error = EEXIST;
	568	else {
	569	int s;
	570	if (xpatcnt == 0) {
9bccf70c	571	at_state.flags \|= AT_ST_STARTING;
1c79356b A	572	ddp_brt_init();
	573	}
	574
	575	/* * find an empty entry * */
	576	ifID = &at_interfaces[xpatcnt];
	577	bzero((caddr_t)ifID, sizeof(at_ifaddr_t));
	578	strncpy(ifID->ifName, ifr->ifr_name, sizeof(ifID->ifName));
	579
	580	ifID->aa_ifp = ifp;
	581	ifa = &ifID->aa_ifa;
	582	TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
	583	if ((sdl = (struct sockaddr_dl *)ifa->ifa_addr) &&
	584	(sdl->sdl_family == AF_LINK)) {
	585	bcopy(LLADDR(sdl), ifID->xaddr, sizeof(ifID->xaddr));
	586	#ifdef APPLETALK_DEBUG
	587	kprintf("SIOCSIFADDR: local enet address is %x.%x.%x.%x.%x.%x\n",
	588	ifID->xaddr[0], ifID->xaddr[1],
	589	ifID->xaddr[2], ifID->xaddr[3],
	590	ifID->xaddr[4], ifID->xaddr[5]);
	591	#endif
	592	break;
	593	}
	594
	595	/* attach the AppleTalk address to the ifnet structure */
	596	ifa = &ifID->aa_ifa;
	597	ifa->ifa_addr = (struct sockaddr *)&ifID->ifNodeAddress;
	598	ifID->ifNodeAddress.sat_len = sizeof(struct sockaddr_at);
	599	ifID->ifNodeAddress.sat_family = AF_APPLETALK;
	600	/* the address itself will be filled in when ifThisNode
	601	is set */
	602	s = splnet();
	603	TAILQ_INSERT_TAIL(&ifp->if_addrhead, ifa, ifa_link);
	604	splx(s);
	605
	606	switch (ifp->if_type) {
	607	case IFT_ETHER:
	608	ether_attach_at(ifp, &ifID->at_dl_tag,
	609	&ifID->aarp_dl_tag);
	610	error = 0;
	611	ifID->cable_multicast_addr = etalk_multicast_addr;
	612
	613	xpatcnt++;
	614	break;
	615	case IFT_FDDI:
	616	ifID->cable_multicast_addr = etalk_multicast_addr;
	617	ddp_bit_reverse(&ifID->cable_multicast_addr);
	618	xpatcnt++;
	619	break;
	620	case IFT_ISO88025: /* token ring */
	621	ifID->cable_multicast_addr = ttalk_multicast_addr;
	622	ddp_bit_reverse(&ifID->cable_multicast_addr);
	623
	624	xpatcnt++;
	625	break;
	626	default:
	627	error = EINVAL;
	628	}
	629	}
	630	break;
	631
	632	/* complete the initialization started in SIOCSIFADDR */
	633	case AIOCSIFADDR:
9bccf70c	634	{
1c79356b A	635	at_if_cfg_t cfgp = (at_if_cfg_t )data;
1c79356b A	636
9bccf70c	637	if (!(at_state.flags & AT_ST_STARTING))
1c79356b A	638	return(ENOTREADY);
	639
	640	if (!(ifID = find_ifID(cfgp->ifr_name)))
	641	return(EINVAL);
9bccf70c	642
1c79356b A	643	return(lap_online(ifID, cfgp));
1c79356b A	644	break;
9bccf70c	645	}
1c79356b A	646
	647	#ifdef NOT_YET
	648	/* *** this can't be added until AT can handle dynamic addition and
	649	deletion of interfaces *** */
	650	case SIOCDIFADDR:
	651	/* check for root access */
	652	if (error = suser(p->p_ucred, &p->p_acflag))
	653	error = EACCES;
	654	else if (!ifID)
	655	error = EINVAL;
	656	else
	657	elap_offline(ifID);
	658	break;
	659	#endif
	660
	661	case SIOCSETOT: {
	662	int s;
	663	struct atpcb at_pcb, clonedat_pcb;
	664	int cloned_fd = (int )data;
	665
	666	s = splnet(); /* XXX */
	667	at_pcb = sotoatpcb(so);
	668
	669	/* let's make sure it's either -1 or a valid file descriptor */
	670	if (cloned_fd != -1) {
	671	struct socket *cloned_so;
	672	struct file *cloned_fp;
	673	error = getsock(p->p_fd, cloned_fd, &cloned_fp);
	674	if (error){
	675	splx(s); /* XXX */
	676	break;
	677	}
	678	cloned_so = (struct socket *)cloned_fp->f_data;
	679	clonedat_pcb = sotoatpcb(cloned_so);
	680	} else {
	681	clonedat_pcb = NULL;
	682	}
	683
	684	if (clonedat_pcb == NULL) {
	685	at_pcb->ddp_flags \|= DDPFLG_STRIPHDR;
	686	} else {
	687	at_pcb->ddp_flags = clonedat_pcb->ddp_flags;
	688	}
	689	splx(s); /* XXX */
	690	break;
	691	}
	692
	693	default:
	694	if (ifp == 0 \|\| ifp->if_ioctl == 0)
	695	return (EOPNOTSUPP);
	696	return dlil_ioctl(0, ifp, cmd, (caddr_t) data);
	697	}
	698
	699	return(error);
	700	}
9bccf70c A	701
	702	/* From dlil_post_msg() */
	703	void atalk_post_msg(struct ifnet ifp, u_long event_code, struct at_addr address, at_nvestr_t *zone)
	704	{
	705	struct kev_atalk_data at_event_data;
	706	struct kev_msg ev_msg;
	707
	708	ev_msg.vendor_code = KEV_VENDOR_APPLE;
	709	ev_msg.kev_class = KEV_NETWORK_CLASS;
	710	ev_msg.kev_subclass = KEV_ATALK_SUBCLASS;
	711	ev_msg.event_code = event_code;
	712
	713	bzero(&at_event_data, sizeof(struct kev_atalk_data));
	714
	715	if (ifp != 0) {
	716	strncpy(&at_event_data.link_data.if_name[0], ifp->if_name, IFNAMSIZ);
	717	at_event_data.link_data.if_family = ifp->if_family;
	718	at_event_data.link_data.if_unit = (unsigned long) ifp->if_unit;
	719	}
	720
	721	if (address != 0) {
	722	at_event_data.node_data.address = *address;
	723	}
	724	else if (zone != 0) {
	725	at_event_data.node_data.zone = *zone;
	726	}
	727
	728	ev_msg.dv[0].data_length = sizeof(struct kev_atalk_data);
	729	ev_msg.dv[0].data_ptr = &at_event_data;
	730	ev_msg.dv[1].data_length = 0;
	731
	732	kev_post_msg(&ev_msg);
	733	}