[apple/xnu.git] / bsd / net / ether_at_pr_module.c

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 * 
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 * 
 * The 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, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */
/*
 * Copyright (c) 1982, 1989, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 */


#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/sysctl.h>

#include <net/if.h>
#include <net/route.h>
#include <net/if_llc.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <netinet/if_ether.h>

#include <sys/socketvar.h>

#include <net/dlil.h>
#include <netat/at_pat.h>
#if NETAT
extern struct ifqueue atalkintrq;
#endif


#if BRIDGE
#include <net/bridge.h>
#endif

/* #include "vlan.h" */
#if NVLAN > 0
#include <net/if_vlan_var.h>
#endif /* NVLAN > 0 */

struct dl_es_at_entry 
{
	struct ifnet *ifp;
	int    ref_count;
};

/* Local fuction declerations */
int at_ether_input(struct mbuf *m, char *frame_header, struct ifnet *ifp,
				   u_long protocol_family, int sync_ok);
int ether_pre_output(struct ifnet *ifp, u_long protocol_family, struct mbuf **m0,
					 const struct sockaddr *dst_netaddr, caddr_t route, char *type, char *edst);
int ether_prmod_ioctl(u_long protocol_family, struct ifnet *ifp, u_long command,
					  caddr_t data);
int ether_attach_at(struct ifnet *ifp);
void ether_detach_at(struct ifnet *ifp);


/*
 * Temp static for protocol registration XXX
 */

#define MAX_EN_COUNT 30

static struct dl_es_at_entry en_at_array[MAX_EN_COUNT];

/*
 * Process a received Ethernet packet;
 * the packet is in the mbuf chain m without
 * the ether header, which is provided separately.
 */
int
at_ether_input(
	struct mbuf				*m,
	__unused char			*frame_header,
	__unused struct ifnet	*ifp,
	__unused u_long			protocol_family,
	__unused int			sync_ok)

{
   /*
	* note: for AppleTalk we need to pass the enet header of the
	* packet up stack. To do so, we made sure in that the FULL packet
	* is copied in the mbuf by the mace driver, and only the m_data and
	* length have been shifted to make IP and the other guys happy.
	*/

	m->m_data -= sizeof(struct ether_header);
	m->m_len += sizeof(struct ether_header);
	m->m_pkthdr.len += sizeof(struct ether_header);
	proto_input(PF_APPLETALK, m);

	return 0;
}


int
ether_pre_output(
	struct ifnet			*ifp,
	__unused u_long			protocol_family,
	struct mbuf				**m0,
	const struct sockaddr	*dst_netaddr,
	__unused caddr_t		route,
	char					*type,
	char					*edst)
{
    register struct mbuf *m = *m0;
    register struct ether_header *eh;
    int hlen;	/* link layer header lenght */


    if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 
	return ENETDOWN;

    hlen = ETHER_HDR_LEN;

    /*
     * Tell ether_frameout it's ok to loop packet unless negated below.
     */
    m->m_flags |= M_LOOP;

    switch (dst_netaddr->sa_family) {
    case AF_UNSPEC:
	m->m_flags &= ~M_LOOP;
	eh = (struct ether_header *)dst_netaddr->sa_data;
	(void)memcpy(edst, eh->ether_dhost, 6);
	*(u_short *)type = eh->ether_type;
	break;
	

    case AF_APPLETALK:
    {
	eh = (struct ether_header *)dst_netaddr->sa_data;
	bcopy((caddr_t)eh->ether_dhost, (caddr_t)edst, 6);
		
	*(u_short *)type = htons(m->m_pkthdr.len);
    }
    break;


    default:
	kprintf("%s%d: can't handle af%d\n", ifp->if_name, ifp->if_unit,
	       dst_netaddr->sa_family);

        return EAFNOSUPPORT;
    }

    return (0);
}


int
ether_prmod_ioctl(
    __unused u_long	protocol_family,
    struct ifnet	*ifp,
    u_long			command,
    caddr_t			data)
{
    struct ifreq *ifr = (struct ifreq *) data;
    int error = 0;

    switch (command) {

    case SIOCSIFADDR:
	 if ((ifp->if_flags & IFF_RUNNING) == 0) {
	      ifnet_set_flags(ifp, IFF_UP, IFF_UP);
	      dlil_ioctl(0, ifp, SIOCSIFFLAGS, (caddr_t) 0);
	 }

	break;

    case SIOCGIFADDR:
	ifnet_lladdr_copy_bytes(ifp, ifr->ifr_addr.sa_data, ETHER_ADDR_LEN);
    break;

    case SIOCSIFMTU:
	/*
	 * Set the interface MTU.
	 */
	if (ifr->ifr_mtu > ETHERMTU) {
	    error = EINVAL;
	} else {
	    ifp->if_mtu = ifr->ifr_mtu;
	}
	break;

    default:
	 return EOPNOTSUPP;
    }


    return (error);
}


int
ether_attach_at(
	struct ifnet *ifp)
{
    struct dlil_proto_reg_str   reg;
    struct dlil_demux_desc      desc;
    struct dlil_demux_desc      desc2;
    int   stat;
    int   first_empty;
    int   i;
    u_int8_t	atalk_snap[5] = {0x08, 0x00, 0x07, 0x80, 0x9b};
    u_int8_t	aarp_snap[5] = {0x00, 0x00, 0x00, 0x80, 0xf3};

    first_empty = MAX_EN_COUNT;
	for (i=0; i < MAX_EN_COUNT; i++) {
		if (en_at_array[i].ifp == 0)
			first_empty = i;
		
		if (en_at_array[i].ifp == ifp) {
			en_at_array[i].ref_count++;
			return 0;
		}
    }
    
	if (first_empty == MAX_EN_COUNT)
		return ENOMEM;
	
	bzero(&reg, sizeof(reg));
	bzero(&desc, sizeof(desc));
	bzero(&desc2, sizeof(desc2));
	
	TAILQ_INIT(&reg.demux_desc_head);
	reg.interface_family = ifp->if_family;
	reg.unit_number      = ifp->if_unit;
	reg.input            = at_ether_input;
	reg.pre_output       = ether_pre_output;
	reg.ioctl            = ether_prmod_ioctl;
	reg.protocol_family  = PF_APPLETALK;

	desc.type = DLIL_DESC_SNAP;
	desc.native_type = atalk_snap;
	desc.variants.native_type_length = sizeof(atalk_snap);
	TAILQ_INSERT_TAIL(&reg.demux_desc_head, &desc, next);
	
	desc2.type = DLIL_DESC_SNAP;
	desc2.native_type = aarp_snap;
	desc2.variants.native_type_length = sizeof(aarp_snap);
	TAILQ_INSERT_TAIL(&reg.demux_desc_head, &desc2, next);
	
    stat = dlil_attach_protocol(&reg);
	if (stat) {
		printf("WARNING: ether_attach_at can't attach at to interface\n");
		return stat;
	}

	en_at_array[first_empty].ifp = ifp;
	en_at_array[first_empty].ref_count = 1;
	
	return 0;
} /* ether_attach_at */


void
ether_detach_at(struct ifnet *ifp)
{
	int i;
	
	for (i=0; i < MAX_EN_COUNT; i++) {
		if (en_at_array[i].ifp == ifp)
			break;
	}
	
	if (i < MAX_EN_COUNT) {
		if (en_at_array[i].ref_count > 1) 
			en_at_array[i].ref_count--;
		else {
			if (en_at_array[i].ref_count == 1) {
				dlil_detach_protocol(ifp, PF_APPLETALK);
				en_at_array[i].ifp = 0;
			}
		}
	}
}
Commit	Line	Data
1c79356b	1	/*
5d5c5d0d A	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
5d5c5d0d A	3	*
8f6c56a5	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
1c79356b	5	*
8f6c56a5 A	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
	14	*
	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
8ad349bb	24	* limitations under the License.
8f6c56a5 A	25	*
8f6c56a5 A	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
1c79356b A	27	*/
	28	/*
	29	* Copyright (c) 1982, 1989, 1993
	30	* The Regents of the University of California. All rights reserved.
	31	*
	32	* Redistribution and use in source and binary forms, with or without
	33	* modification, are permitted provided that the following conditions
	34	* are met:
	35	* 1. Redistributions of source code must retain the above copyright
	36	* notice, this list of conditions and the following disclaimer.
	37	* 2. Redistributions in binary form must reproduce the above copyright
	38	* notice, this list of conditions and the following disclaimer in the
	39	* documentation and/or other materials provided with the distribution.
	40	* 3. All advertising materials mentioning features or use of this software
	41	* must display the following acknowledgement:
	42	* This product includes software developed by the University of
	43	* California, Berkeley and its contributors.
	44	* 4. Neither the name of the University nor the names of its contributors
	45	* may be used to endorse or promote products derived from this software
	46	* without specific prior written permission.
	47	*
	48	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	49	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	50	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	51	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	52	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	53	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	54	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	55	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	56	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	57	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	58	* SUCH DAMAGE.
	59	*
	60	*/
	61
	62
	63
	64	#include <sys/param.h>
	65	#include <sys/systm.h>
	66	#include <sys/kernel.h>
	67	#include <sys/malloc.h>
	68	#include <sys/mbuf.h>
	69	#include <sys/socket.h>
	70	#include <sys/sockio.h>
	71	#include <sys/sysctl.h>
	72
	73	#include <net/if.h>
1c79356b A	74	#include <net/route.h>
	75	#include <net/if_llc.h>
	76	#include <net/if_dl.h>
	77	#include <net/if_types.h>
1c79356b A	78	#include <netinet/if_ether.h>
	79
	80	#include <sys/socketvar.h>
	81
	82	#include <net/dlil.h>
	83	#include <netat/at_pat.h>
	84	#if NETAT
	85	extern struct ifqueue atalkintrq;
	86	#endif
	87
	88
	89	#if BRIDGE
	90	#include <net/bridge.h>
	91	#endif
	92
	93	/* #include "vlan.h" */
	94	#if NVLAN > 0
	95	#include <net/if_vlan_var.h>
	96	#endif /* NVLAN > 0 */
	97
1c79356b A	98	struct dl_es_at_entry
1c79356b A	99	{
91447636 A	100	struct ifnet *ifp;
91447636 A	101	int ref_count;
1c79356b A	102	};
1c79356b A	103
91447636 A	104	/* Local fuction declerations */
	105	int at_ether_input(struct mbuf m, char frame_header, struct ifnet *ifp,
	106	u_long protocol_family, int sync_ok);
	107	int ether_pre_output(struct ifnet ifp, u_long protocol_family, struct mbuf *m0,
	108	const struct sockaddr dst_netaddr, caddr_t route, char type, char *edst);
	109	int ether_prmod_ioctl(u_long protocol_family, struct ifnet *ifp, u_long command,
	110	caddr_t data);
	111	int ether_attach_at(struct ifnet *ifp);
	112	void ether_detach_at(struct ifnet *ifp);
	113
1c79356b A	114
	115	/*
	116	* Temp static for protocol registration XXX
	117	*/
	118
	119	#define MAX_EN_COUNT 30
	120
	121	static struct dl_es_at_entry en_at_array[MAX_EN_COUNT];
	122
	123	/*
	124	* Process a received Ethernet packet;
	125	* the packet is in the mbuf chain m without
	126	* the ether header, which is provided separately.
	127	*/
	128	int
91447636 A	129	at_ether_input(
	130	struct mbuf *m,
	131	__unused char *frame_header,
	132	__unused struct ifnet *ifp,
	133	__unused u_long protocol_family,
	134	__unused int sync_ok)
1c79356b A	135
1c79356b A	136	{
91447636 A	137	/*
	138	* note: for AppleTalk we need to pass the enet header of the
	139	* packet up stack. To do so, we made sure in that the FULL packet
	140	* is copied in the mbuf by the mace driver, and only the m_data and
	141	* length have been shifted to make IP and the other guys happy.
	142	*/
	143
	144	m->m_data -= sizeof(struct ether_header);
	145	m->m_len += sizeof(struct ether_header);
	146	m->m_pkthdr.len += sizeof(struct ether_header);
	147	proto_input(PF_APPLETALK, m);
1c79356b	148
1c79356b	149	return 0;
1c79356b A	150	}
	151
	152
	153
	154	int
91447636 A	155	ether_pre_output(
	156	struct ifnet *ifp,
	157	__unused u_long protocol_family,
	158	struct mbuf **m0,
	159	const struct sockaddr *dst_netaddr,
	160	__unused caddr_t route,
	161	char *type,
	162	char *edst)
1c79356b	163	{
1c79356b	164	register struct mbuf m = m0;
1c79356b	165	register struct ether_header *eh;
1c79356b	166	int hlen; /* link layer header lenght */
1c79356b A	167
	168
	169
	170	if ((ifp->if_flags & (IFF_UP\|IFF_RUNNING)) != (IFF_UP\|IFF_RUNNING))
	171	return ENETDOWN;
	172
	173	hlen = ETHER_HDR_LEN;
	174
	175	/*
	176	* Tell ether_frameout it's ok to loop packet unless negated below.
	177	*/
	178	m->m_flags \|= M_LOOP;
	179
	180	switch (dst_netaddr->sa_family) {
	181	case AF_UNSPEC:
	182	m->m_flags &= ~M_LOOP;
	183	eh = (struct ether_header *)dst_netaddr->sa_data;
	184	(void)memcpy(edst, eh->ether_dhost, 6);
	185	(u_short )type = eh->ether_type;
	186	break;
	187
	188
	189	case AF_APPLETALK:
	190	{
	191	eh = (struct ether_header *)dst_netaddr->sa_data;
	192	bcopy((caddr_t)eh->ether_dhost, (caddr_t)edst, 6);
	193
89b3af67	194	(u_short )type = htons(m->m_pkthdr.len);
1c79356b A	195	}
	196	break;
	197
	198
	199	default:
	200	kprintf("%s%d: can't handle af%d\n", ifp->if_name, ifp->if_unit,
	201	dst_netaddr->sa_family);
	202
	203	return EAFNOSUPPORT;
	204	}
	205
	206	return (0);
	207	}
	208
	209
	210
	211
	212
	213	int
91447636 A	214	ether_prmod_ioctl(
	215	__unused u_long protocol_family,
	216	struct ifnet *ifp,
	217	u_long command,
	218	caddr_t data)
1c79356b	219	{
1c79356b A	220	struct ifreq ifr = (struct ifreq ) data;
1c79356b A	221	int error = 0;
1c79356b A	222
	223	switch (command) {
	224
	225	case SIOCSIFADDR:
	226	if ((ifp->if_flags & IFF_RUNNING) == 0) {
91447636	227	ifnet_set_flags(ifp, IFF_UP, IFF_UP);
1c79356b A	228	dlil_ioctl(0, ifp, SIOCSIFFLAGS, (caddr_t) 0);
	229	}
	230
	231	break;
	232
	233	case SIOCGIFADDR:
91447636	234	ifnet_lladdr_copy_bytes(ifp, ifr->ifr_addr.sa_data, ETHER_ADDR_LEN);
1c79356b A	235	break;
	236
	237	case SIOCSIFMTU:
	238	/*
	239	* Set the interface MTU.
	240	*/
	241	if (ifr->ifr_mtu > ETHERMTU) {
	242	error = EINVAL;
	243	} else {
	244	ifp->if_mtu = ifr->ifr_mtu;
	245	}
	246	break;
	247
	248	default:
	249	return EOPNOTSUPP;
	250	}
	251
1c79356b A	252
	253	return (error);
	254	}
	255
	256
	257
91447636 A	258	int
	259	ether_attach_at(
	260	struct ifnet *ifp)
1c79356b A	261	{
	262	struct dlil_proto_reg_str reg;
	263	struct dlil_demux_desc desc;
	264	struct dlil_demux_desc desc2;
1c79356b A	265	int stat;
	266	int first_empty;
	267	int i;
91447636 A	268	u_int8_t atalk_snap[5] = {0x08, 0x00, 0x07, 0x80, 0x9b};
91447636 A	269	u_int8_t aarp_snap[5] = {0x00, 0x00, 0x00, 0x80, 0xf3};
1c79356b A	270
1c79356b A	271	first_empty = MAX_EN_COUNT;
91447636 A	272	for (i=0; i < MAX_EN_COUNT; i++) {
	273	if (en_at_array[i].ifp == 0)
	274	first_empty = i;
	275
	276	if (en_at_array[i].ifp == ifp) {
	277	en_at_array[i].ref_count++;
	278	return 0;
	279	}
1c79356b A	280	}
1c79356b A	281
91447636 A	282	if (first_empty == MAX_EN_COUNT)
	283	return ENOMEM;
	284
	285	bzero(&reg, sizeof(reg));
	286	bzero(&desc, sizeof(desc));
	287	bzero(&desc2, sizeof(desc2));
	288
	289	TAILQ_INIT(&reg.demux_desc_head);
	290	reg.interface_family = ifp->if_family;
	291	reg.unit_number = ifp->if_unit;
	292	reg.input = at_ether_input;
	293	reg.pre_output = ether_pre_output;
	294	reg.ioctl = ether_prmod_ioctl;
	295	reg.protocol_family = PF_APPLETALK;
	296
	297	desc.type = DLIL_DESC_SNAP;
	298	desc.native_type = atalk_snap;
	299	desc.variants.native_type_length = sizeof(atalk_snap);
	300	TAILQ_INSERT_TAIL(&reg.demux_desc_head, &desc, next);
	301
	302	desc2.type = DLIL_DESC_SNAP;
	303	desc2.native_type = aarp_snap;
	304	desc2.variants.native_type_length = sizeof(aarp_snap);
	305	TAILQ_INSERT_TAIL(&reg.demux_desc_head, &desc2, next);
	306
	307	stat = dlil_attach_protocol(&reg);
	308	if (stat) {
	309	printf("WARNING: ether_attach_at can't attach at to interface\n");
	310	return stat;
	311	}
1c79356b	312
91447636 A	313	en_at_array[first_empty].ifp = ifp;
	314	en_at_array[first_empty].ref_count = 1;
	315
	316	return 0;
1c79356b A	317	} /* ether_attach_at */
	318
	319
	320	void
	321	ether_detach_at(struct ifnet *ifp)
	322	{
91447636 A	323	int i;
	324
	325	for (i=0; i < MAX_EN_COUNT; i++) {
	326	if (en_at_array[i].ifp == ifp)
	327	break;
	328	}
	329
	330	if (i < MAX_EN_COUNT) {
	331	if (en_at_array[i].ref_count > 1)
	332	en_at_array[i].ref_count--;
	333	else {
	334	if (en_at_array[i].ref_count == 1) {
	335	dlil_detach_protocol(ifp, PF_APPLETALK);
	336	en_at_array[i].ifp = 0;
	337	}
	338	}
	339	}
1c79356b	340	}