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

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
 * 
 * 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. 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_LICENSE_HEADER_END@
 */
/*	$KAME: if_faith.c,v 1.21 2001/02/20 07:59:26 itojun Exp $	*/

/*
 * Copyright (c) 1982, 1986, 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.
 *
 * $FreeBSD: src/sys/net/if_faith.c,v 1.3.2.2 2001/07/05 14:46:25 ume Exp $
 */
/*
 * derived from
 *	@(#)if_loop.c	8.1 (Berkeley) 6/10/93
 * Id: if_loop.c,v 1.22 1996/06/19 16:24:10 wollman Exp
 */

/*
 * Loopback interface driver for protocol testing and timing.
 */

#include "faith.h"
#if NFAITH > 0

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/errno.h>
#include <sys/sockio.h>
#include <sys/time.h>
#include <sys/queue.h>

#include <net/if.h>
#include <net/if_types.h>
#include <net/netisr.h>
#include <net/route.h>
#include <net/bpf.h>
#include <net/if_faith.h>

#if	INET
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip.h>
#endif

#if INET6
#ifndef INET
#include <netinet/in.h>
#endif
#include <netinet6/in6_var.h>
#include <netinet/ip6.h>
#include <netinet6/ip6_var.h>
#endif

#include <net/dlil.h>
#include "bpf.h"

#include <net/net_osdep.h>

static int faithioctl __P((struct ifnet *, u_long, void*));
int faith_pre_output __P((struct ifnet *, register struct mbuf **, struct sockaddr *,
	caddr_t, char *, char *, u_long));
static void faithrtrequest __P((int, struct rtentry *, struct sockaddr *));

void faithattach __P((void));
#ifndef __APPLE__
PSEUDO_SET(faithattach, if_faith);
#endif

static struct ifnet faithif[NFAITH];
static struct if_proto *faith_array[NFAITH];
static int faith_count = 0;

#define	FAITHMTU	1500

static
int  faith_add_if(struct ifnet *ifp)
{
    ifp->if_demux  = 0;
    ifp->if_framer = 0;
    return 0;
}

static 
int  faith_del_if(struct ifnet *ifp)
{
    return 0;
}

static
int  faith_add_proto(struct ddesc_head_str *desc_head, struct if_proto *proto, u_long dl_tag)
{       
    int i;
    
    for (i=0; i < faith_count; i++)
        if (faith_array[i] == 0) {
            faith_array[faith_count] = proto;
            return 0;
        }
    
    if ((i == faith_count) && (faith_count == NFAITH))
       panic("faith_add_proto -- Too many attachments\n");

    faith_array[faith_count++] = proto;

    return (0);
}

static
int  faith_del_proto(struct if_proto *proto, u_long dl_tag)
{   
    int i;


    for (i=0; i < faith_count; i++)
        if (faith_array[i] == proto) {
            faith_array[i] = 0;
            return 0;
        }

    return ENOENT;
}

int faith_shutdown()
{
    return 0;
}

int  faith_attach_inet(struct ifnet *ifp, u_long *dl_tag)
{       
    struct dlil_proto_reg_str   reg;
    struct dlil_demux_desc      desc;
    short native=0;
    int   stat;
    int i;

    for (i=0; i < faith_count; i++) {
        if (faith_array[i] && (faith_array[i]->ifp == ifp) &&
            (faith_array[i]->protocol_family == PF_INET)) {
#if 0
	        kprintf("faith_array for %s%d found dl_tag=%d\n",
                       ifp->if_name, ifp->if_unit, faith_array[i]->dl_tag);
#endif
                *dl_tag = faith_array[i]->dl_tag;
		return 0;
       
        }
    }

    TAILQ_INIT(&reg.demux_desc_head); 
    desc.type = DLIL_DESC_RAW;
    desc.variants.bitmask.proto_id_length = 0;
    desc.variants.bitmask.proto_id = 0;
    desc.variants.bitmask.proto_id_mask = 0;
    desc.native_type = (char *) &native;
    TAILQ_INSERT_TAIL(&reg.demux_desc_head, &desc, next);
    reg.interface_family = ifp->if_family;
    reg.unit_number      = ifp->if_unit;
    reg.input            = 0;
    reg.pre_output       = faith_pre_output;
    reg.event            = 0;
    reg.offer            = 0;
    reg.ioctl            = 0;
    reg.default_proto    = 0;
    reg.protocol_family  = PF_INET;

    stat = dlil_attach_protocol(&reg, dl_tag);
    if (stat) {
        panic("faith_attach_inet can't attach interface\n");
    }

    return stat;
}

void faith_reg_if_mods()
{   
     struct dlil_ifmod_reg_str  faith_ifmod;
     struct dlil_protomod_reg_str faith_protoreg;
     int error;

     bzero(&faith_ifmod, sizeof(faith_ifmod));
     faith_ifmod.add_if = faith_add_if;
     faith_ifmod.del_if = faith_del_if;
     faith_ifmod.add_proto = faith_add_proto;
     faith_ifmod.del_proto = faith_del_proto;
     faith_ifmod.ifmod_ioctl = 0;
     faith_ifmod.shutdown    = faith_shutdown;

    
    if (dlil_reg_if_modules(APPLE_IF_FAM_FAITH, &faith_ifmod))
        panic("Couldn't register faith modules\n");

	/* Register protocol registration functions */

	bzero(&faith_protoreg, sizeof(faith_protoreg));
	faith_protoreg.attach_proto = faith_attach_inet;
	faith_protoreg.detach_proto = 0;
	
	if ( error = dlil_reg_proto_module(PF_INET, APPLE_IF_FAM_FAITH, &faith_protoreg) != 0)
		kprintf("dlil_reg_proto_module failed for AF_INET error=%d\n", error);

    
}   
    
void
faithattach(void)
{
	struct ifnet *ifp;
	int i;

	faith_reg_if_mods(); /* DLIL modules */

	for (i = 0; i < NFAITH; i++) {
		ifp = &faithif[i];
		bzero(ifp, sizeof(faithif[i]));
		ifp->if_name = "faith";
		ifp->if_unit = i;
		ifp->if_family = APPLE_IF_FAM_FAITH;
		ifp->if_mtu = FAITHMTU;
		/* LOOPBACK commented out to announce IPv6 routes to faith */
		ifp->if_flags = /* IFF_LOOPBACK | */ IFF_MULTICAST;
		ifp->if_ioctl = faithioctl;
		ifp->if_output = NULL;
		ifp->if_type = IFT_FAITH;
		ifp->if_hdrlen = 0;
		ifp->if_addrlen = 0;
		dlil_if_attach(ifp);
#if NBPFILTER > 0
#ifdef HAVE_OLD_BPF
		bpfattach(ifp, DLT_NULL, sizeof(u_int));
#else
		bpfattach(&ifp->if_bpf, ifp, DLT_NULL, sizeof(u_int));
#endif
#endif
	}
}

int
faith_pre_output(ifp, m0, dst, route_entry, frame_type, dst_addr, dl_tag)
	struct ifnet *ifp;
	register struct mbuf **m0;
	struct sockaddr *dst;
	caddr_t			 route_entry;
	char		     *frame_type;
	char		     *dst_addr;
	u_long		     dl_tag;
{
	int s, isr;
	register struct ifqueue *ifq = 0;
	register struct mbuf *m = *m0;
	struct rtentry *rt = (struct rtentry*)route_entry;

	if ((m->m_flags & M_PKTHDR) == 0)
		panic("faithoutput no HDR");
#if NBPFILTER > 0
	/* BPF write needs to be handled specially */
	if (dst && dst->sa_family == AF_UNSPEC) {
		dst->sa_family = *(mtod(m, int *));
		m->m_len -= sizeof(int);
		m->m_pkthdr.len -= sizeof(int);
		m->m_data += sizeof(int);
	}

	if (ifp->if_bpf) {
		/*
		 * We need to prepend the address family as
		 * a four byte field.  Cons up a faith header
		 * to pacify bpf.  This is safe because bpf
		 * will only read from the mbuf (i.e., it won't
		 * try to free it or keep a pointer a to it).
		 */
		struct mbuf m0;
		u_int32_t af = dst->sa_family;

		m0.m_next = m;
		m0.m_len = 4;
		m0.m_data = (char *)&af;

#ifdef HAVE_OLD_BPF
		bpf_mtap(ifp, &m0);
#else
		bpf_mtap(ifp->if_bpf, &m0);
#endif
	}
#endif

	if (rt && rt->rt_flags & (RTF_REJECT|RTF_BLACKHOLE)) {
		return (rt->rt_flags & RTF_BLACKHOLE ? 0 :
		        rt->rt_flags & RTF_HOST ? EHOSTUNREACH : ENETUNREACH);
	}
	ifp->if_opackets++;
	ifp->if_obytes += m->m_pkthdr.len;
	switch (dst->sa_family) {
#if INET
	case AF_INET:
		ifq = &ipintrq;
		isr = NETISR_IP;
		break;
#endif
#if INET6
	case AF_INET6:
		ifq = &ip6intrq;
		isr = NETISR_IPV6;
		break;
#endif
	default:
		return EAFNOSUPPORT;
	}

	/* XXX do we need more sanity checks? */

	m->m_pkthdr.rcvif = ifp;
	s = splimp();
	if (IF_QFULL(ifq)) {
		IF_DROP(ifq);
		splx(s);
		return (ENOBUFS);
	}
	IF_ENQUEUE(ifq, m);
	schednetisr(isr);
	ifp->if_ipackets++;
	ifp->if_ibytes += m->m_pkthdr.len;
	splx(s);
	return (EJUSTRETURN);
}

/* ARGSUSED */
static void
faithrtrequest(cmd, rt, sa)
	int cmd;
	struct rtentry *rt;
	struct sockaddr *sa;
{
	if (rt) {
		rt->rt_rmx.rmx_mtu = rt->rt_ifp->if_mtu; /* for ISO */
		/*
		 * For optimal performance, the send and receive buffers
		 * should be at least twice the MTU plus a little more for
		 * overhead.
		 */
		rt->rt_rmx.rmx_recvpipe =
			rt->rt_rmx.rmx_sendpipe = 3 * FAITHMTU;
	}
}

/*
 * Process an ioctl request.
 */
/* ARGSUSED */
static int
faithioctl(ifp, cmd, data)
	struct ifnet *ifp;
	u_long cmd;
	void* data;
{
	struct ifaddr *ifa;
	struct ifreq *ifr = (struct ifreq *)data;
	int error = 0;

	switch (cmd) {

	case SIOCSIFADDR:
		ifp->if_flags |= IFF_UP | IFF_RUNNING;
		ifa = (struct ifaddr *)data;
		ifa->ifa_rtrequest = faithrtrequest;
		/*
		 * Everything else is done at a higher level.
		 */
		break;

	case SIOCADDMULTI:
	case SIOCDELMULTI:
		if (ifr == 0) {
			error = EAFNOSUPPORT;		/* XXX */
			break;
		}
		switch (ifr->ifr_addr.sa_family) {
#if INET
		case AF_INET:
			break;
#endif
#if INET6
		case AF_INET6:
			break;
#endif

		default:
			error = EAFNOSUPPORT;
			break;
		}
		break;

#ifdef SIOCSIFMTU
	case SIOCSIFMTU:
		ifp->if_mtu = ifr->ifr_mtu;
		break;
#endif

	case SIOCSIFFLAGS:
		break;

	default:
		error = EINVAL;
	}
	return (error);
}

#if INET6
/*
 * XXX could be slow
 * XXX could be layer violation to call sys/net from sys/netinet6
 */
int
faithprefix(in6)
	struct in6_addr *in6;
{
	struct rtentry *rt;
	struct sockaddr_in6 sin6;
	int ret;

	if (ip6_keepfaith == 0)
		return 0;

	bzero(&sin6, sizeof(sin6));
	sin6.sin6_family = AF_INET6;
	sin6.sin6_len = sizeof(struct sockaddr_in6);
	sin6.sin6_addr = *in6;
	rt = rtalloc1((struct sockaddr *)&sin6, 0, 0UL);
	if (rt && rt->rt_ifp && rt->rt_ifp->if_type == IFT_FAITH &&
	    (rt->rt_ifp->if_flags & IFF_UP) != 0)
		ret = 1;
	else
		ret = 0;
	if (rt)
		rtfree(rt);
	return ret;
}
#endif
#endif /* NFAITH > 0 */
Commit	Line	Data
1c79356b A	1	/*
	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
43866e37	6	* Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
1c79356b	7	*
43866e37 A	8	* This file contains Original Code and/or Modifications of Original Code
	9	* as defined in and that are subject to the Apple Public Source License
	10	* Version 2.0 (the 'License'). You may not use this file except in
	11	* compliance with the License. Please obtain a copy of the License at
	12	* http://www.opensource.apple.com/apsl/ and read it before using this
	13	* file.
	14	*
	15	* The Original Code and all software distributed under the License are
	16	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
1c79356b A	17	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
1c79356b A	18	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
43866e37 A	19	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	20	* Please see the License for the specific language governing rights and
	21	* limitations under the License.
1c79356b A	22	*
	23	* @APPLE_LICENSE_HEADER_END@
	24	*/
9bccf70c	25	/* $KAME: if_faith.c,v 1.21 2001/02/20 07:59:26 itojun Exp $ */
1c79356b A	26
	27	/*
	28	* Copyright (c) 1982, 1986, 1993
	29	* The Regents of the University of California. All rights reserved.
	30	*
	31	* Redistribution and use in source and binary forms, with or without
	32	* modification, are permitted provided that the following conditions
	33	* are met:
	34	* 1. Redistributions of source code must retain the above copyright
	35	* notice, this list of conditions and the following disclaimer.
	36	* 2. Redistributions in binary form must reproduce the above copyright
	37	* notice, this list of conditions and the following disclaimer in the
	38	* documentation and/or other materials provided with the distribution.
	39	* 3. All advertising materials mentioning features or use of this software
	40	* must display the following acknowledgement:
	41	* This product includes software developed by the University of
	42	* California, Berkeley and its contributors.
	43	* 4. Neither the name of the University nor the names of its contributors
	44	* may be used to endorse or promote products derived from this software
	45	* without specific prior written permission.
	46	*
	47	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	48	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	49	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	50	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	51	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	52	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	53	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	54	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	55	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	56	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	57	* SUCH DAMAGE.
9bccf70c A	58	*
9bccf70c A	59	* $FreeBSD: src/sys/net/if_faith.c,v 1.3.2.2 2001/07/05 14:46:25 ume Exp $
1c79356b A	60	*/
	61	/*
	62	* derived from
	63	* @(#)if_loop.c 8.1 (Berkeley) 6/10/93
	64	* Id: if_loop.c,v 1.22 1996/06/19 16:24:10 wollman Exp
	65	*/
	66
	67	/*
	68	* Loopback interface driver for protocol testing and timing.
	69	*/
1c79356b A	70
	71	#include "faith.h"
	72	#if NFAITH > 0
	73
	74	#include <sys/param.h>
	75	#include <sys/systm.h>
	76	#include <sys/kernel.h>
	77	#include <sys/mbuf.h>
	78	#include <sys/socket.h>
	79	#include <sys/errno.h>
1c79356b	80	#include <sys/sockio.h>
1c79356b	81	#include <sys/time.h>
9bccf70c	82	#include <sys/queue.h>
1c79356b A	83
	84	#include <net/if.h>
	85	#include <net/if_types.h>
	86	#include <net/netisr.h>
	87	#include <net/route.h>
	88	#include <net/bpf.h>
9bccf70c	89	#include <net/if_faith.h>
1c79356b A	90
	91	#if INET
	92	#include <netinet/in.h>
	93	#include <netinet/in_systm.h>
	94	#include <netinet/in_var.h>
	95	#include <netinet/ip.h>
	96	#endif
	97
	98	#if INET6
	99	#ifndef INET
	100	#include <netinet/in.h>
	101	#endif
	102	#include <netinet6/in6_var.h>
	103	#include <netinet/ip6.h>
9bccf70c	104	#include <netinet6/ip6_var.h>
1c79356b A	105	#endif
	106
	107	#include <net/dlil.h>
9bccf70c	108	#include "bpf.h"
1c79356b A	109
	110	#include <net/net_osdep.h>
	111
9bccf70c	112	static int faithioctl __P((struct ifnet , u_long, void));
1c79356b	113	int faith_pre_output __P((struct ifnet , register struct mbuf , struct sockaddr ,
9bccf70c	114	caddr_t, char , char , u_long));
1c79356b A	115	static void faithrtrequest __P((int, struct rtentry , struct sockaddr ));
1c79356b A	116
9bccf70c A	117	void faithattach __P((void));
	118	#ifndef __APPLE__
	119	PSEUDO_SET(faithattach, if_faith);
1c79356b A	120	#endif
1c79356b A	121
1c79356b A	122	static struct ifnet faithif[NFAITH];
	123	static struct if_proto *faith_array[NFAITH];
	124	static int faith_count = 0;
	125
	126	#define FAITHMTU 1500
	127
	128	static
	129	int faith_add_if(struct ifnet *ifp)
	130	{
	131	ifp->if_demux = 0;
	132	ifp->if_framer = 0;
	133	return 0;
	134	}
	135
	136	static
	137	int faith_del_if(struct ifnet *ifp)
	138	{
	139	return 0;
	140	}
	141
	142	static
	143	int faith_add_proto(struct ddesc_head_str desc_head, struct if_proto proto, u_long dl_tag)
	144	{
	145	int i;
	146
	147	for (i=0; i < faith_count; i++)
	148	if (faith_array[i] == 0) {
	149	faith_array[faith_count] = proto;
	150	return 0;
	151	}
	152
	153	if ((i == faith_count) && (faith_count == NFAITH))
	154	panic("faith_add_proto -- Too many attachments\n");
	155
	156	faith_array[faith_count++] = proto;
	157
	158	return (0);
	159	}
	160
	161	static
	162	int faith_del_proto(struct if_proto *proto, u_long dl_tag)
	163	{
	164	int i;
	165
	166
	167	for (i=0; i < faith_count; i++)
	168	if (faith_array[i] == proto) {
	169	faith_array[i] = 0;
	170	return 0;
	171	}
	172
	173	return ENOENT;
	174	}
	175
	176	int faith_shutdown()
	177	{
	178	return 0;
	179	}
	180
55e303ae	181	int faith_attach_inet(struct ifnet ifp, u_long dl_tag)
1c79356b A	182	{
	183	struct dlil_proto_reg_str reg;
	184	struct dlil_demux_desc desc;
1c79356b A	185	short native=0;
	186	int stat;
	187	int i;
	188
	189	for (i=0; i < faith_count; i++) {
	190	if (faith_array[i] && (faith_array[i]->ifp == ifp) &&
	191	(faith_array[i]->protocol_family == PF_INET)) {
	192	#if 0
	193	kprintf("faith_array for %s%d found dl_tag=%d\n",
	194	ifp->if_name, ifp->if_unit, faith_array[i]->dl_tag);
	195	#endif
55e303ae A	196	*dl_tag = faith_array[i]->dl_tag;
55e303ae A	197	return 0;
1c79356b A	198
	199	}
	200	}
	201
	202	TAILQ_INIT(&reg.demux_desc_head);
	203	desc.type = DLIL_DESC_RAW;
	204	desc.variants.bitmask.proto_id_length = 0;
	205	desc.variants.bitmask.proto_id = 0;
	206	desc.variants.bitmask.proto_id_mask = 0;
	207	desc.native_type = (char *) &native;
	208	TAILQ_INSERT_TAIL(&reg.demux_desc_head, &desc, next);
	209	reg.interface_family = ifp->if_family;
	210	reg.unit_number = ifp->if_unit;
	211	reg.input = 0;
	212	reg.pre_output = faith_pre_output;
	213	reg.event = 0;
	214	reg.offer = 0;
9bccf70c	215	reg.ioctl = 0;
1c79356b A	216	reg.default_proto = 0;
	217	reg.protocol_family = PF_INET;
	218
55e303ae	219	stat = dlil_attach_protocol(&reg, dl_tag);
1c79356b A	220	if (stat) {
	221	panic("faith_attach_inet can't attach interface\n");
	222	}
	223
55e303ae	224	return stat;
1c79356b A	225	}
1c79356b A	226
55e303ae A	227	void faith_reg_if_mods()
	228	{
	229	struct dlil_ifmod_reg_str faith_ifmod;
	230	struct dlil_protomod_reg_str faith_protoreg;
	231	int error;
	232
	233	bzero(&faith_ifmod, sizeof(faith_ifmod));
	234	faith_ifmod.add_if = faith_add_if;
	235	faith_ifmod.del_if = faith_del_if;
	236	faith_ifmod.add_proto = faith_add_proto;
	237	faith_ifmod.del_proto = faith_del_proto;
	238	faith_ifmod.ifmod_ioctl = 0;
	239	faith_ifmod.shutdown = faith_shutdown;
	240
	241
	242	if (dlil_reg_if_modules(APPLE_IF_FAM_FAITH, &faith_ifmod))
	243	panic("Couldn't register faith modules\n");
	244
	245	/* Register protocol registration functions */
	246
	247	bzero(&faith_protoreg, sizeof(faith_protoreg));
	248	faith_protoreg.attach_proto = faith_attach_inet;
	249	faith_protoreg.detach_proto = 0;
	250
	251	if ( error = dlil_reg_proto_module(PF_INET, APPLE_IF_FAM_FAITH, &faith_protoreg) != 0)
	252	kprintf("dlil_reg_proto_module failed for AF_INET error=%d\n", error);
	253
	254
	255	}
	256
1c79356b	257	void
9bccf70c	258	faithattach(void)
1c79356b A	259	{
	260	struct ifnet *ifp;
	261	int i;
	262
	263	faith_reg_if_mods(); /* DLIL modules */
	264
	265	for (i = 0; i < NFAITH; i++) {
	266	ifp = &faithif[i];
	267	bzero(ifp, sizeof(faithif[i]));
	268	ifp->if_name = "faith";
	269	ifp->if_unit = i;
	270	ifp->if_family = APPLE_IF_FAM_FAITH;
	271	ifp->if_mtu = FAITHMTU;
9bccf70c A	272	/* LOOPBACK commented out to announce IPv6 routes to faith */
9bccf70c A	273	ifp->if_flags = /* IFF_LOOPBACK \| */ IFF_MULTICAST;
1c79356b A	274	ifp->if_ioctl = faithioctl;
	275	ifp->if_output = NULL;
	276	ifp->if_type = IFT_FAITH;
	277	ifp->if_hdrlen = 0;
	278	ifp->if_addrlen = 0;
	279	dlil_if_attach(ifp);
	280	#if NBPFILTER > 0
	281	#ifdef HAVE_OLD_BPF
	282	bpfattach(ifp, DLT_NULL, sizeof(u_int));
	283	#else
	284	bpfattach(&ifp->if_bpf, ifp, DLT_NULL, sizeof(u_int));
	285	#endif
	286	#endif
	287	}
	288	}
	289
	290	int
9bccf70c	291	faith_pre_output(ifp, m0, dst, route_entry, frame_type, dst_addr, dl_tag)
1c79356b A	292	struct ifnet *ifp;
	293	register struct mbuf **m0;
	294	struct sockaddr *dst;
9bccf70c	295	caddr_t route_entry;
1c79356b A	296	char *frame_type;
	297	char *dst_addr;
	298	u_long dl_tag;
	299	{
	300	int s, isr;
	301	register struct ifqueue *ifq = 0;
	302	register struct mbuf m = m0;
9bccf70c	303	struct rtentry rt = (struct rtentry)route_entry;
1c79356b A	304
	305	if ((m->m_flags & M_PKTHDR) == 0)
	306	panic("faithoutput no HDR");
	307	#if NBPFILTER > 0
	308	/* BPF write needs to be handled specially */
	309	if (dst && dst->sa_family == AF_UNSPEC) {
	310	dst->sa_family = (mtod(m, int ));
	311	m->m_len -= sizeof(int);
	312	m->m_pkthdr.len -= sizeof(int);
	313	m->m_data += sizeof(int);
	314	}
	315
	316	if (ifp->if_bpf) {
	317	/*
	318	* We need to prepend the address family as
	319	* a four byte field. Cons up a faith header
	320	* to pacify bpf. This is safe because bpf
	321	* will only read from the mbuf (i.e., it won't
	322	* try to free it or keep a pointer a to it).
	323	*/
	324	struct mbuf m0;
9bccf70c	325	u_int32_t af = dst->sa_family;
1c79356b A	326
	327	m0.m_next = m;
	328	m0.m_len = 4;
	329	m0.m_data = (char *)⁡
	330
9bccf70c	331	#ifdef HAVE_OLD_BPF
1c79356b A	332	bpf_mtap(ifp, &m0);
	333	#else
	334	bpf_mtap(ifp->if_bpf, &m0);
	335	#endif
	336	}
	337	#endif
	338
	339	if (rt && rt->rt_flags & (RTF_REJECT\|RTF_BLACKHOLE)) {
9bccf70c A	340	return (rt->rt_flags & RTF_BLACKHOLE ? 0 :
9bccf70c A	341	rt->rt_flags & RTF_HOST ? EHOSTUNREACH : ENETUNREACH);
1c79356b A	342	}
	343	ifp->if_opackets++;
	344	ifp->if_obytes += m->m_pkthdr.len;
	345	switch (dst->sa_family) {
	346	#if INET
	347	case AF_INET:
	348	ifq = &ipintrq;
	349	isr = NETISR_IP;
	350	break;
	351	#endif
	352	#if INET6
	353	case AF_INET6:
	354	ifq = &ip6intrq;
	355	isr = NETISR_IPV6;
	356	break;
	357	#endif
	358	default:
1c79356b A	359	return EAFNOSUPPORT;
	360	}
	361
	362	/* XXX do we need more sanity checks? */
	363
	364	m->m_pkthdr.rcvif = ifp;
	365	s = splimp();
	366	if (IF_QFULL(ifq)) {
	367	IF_DROP(ifq);
1c79356b	368	splx(s);
9bccf70c	369	return (ENOBUFS);
1c79356b A	370	}
	371	IF_ENQUEUE(ifq, m);
	372	schednetisr(isr);
	373	ifp->if_ipackets++;
	374	ifp->if_ibytes += m->m_pkthdr.len;
	375	splx(s);
	376	return (EJUSTRETURN);
	377	}
	378
	379	/* ARGSUSED */
	380	static void
	381	faithrtrequest(cmd, rt, sa)
	382	int cmd;
	383	struct rtentry *rt;
	384	struct sockaddr *sa;
	385	{
	386	if (rt) {
	387	rt->rt_rmx.rmx_mtu = rt->rt_ifp->if_mtu; /* for ISO */
	388	/*
	389	* For optimal performance, the send and receive buffers
	390	* should be at least twice the MTU plus a little more for
	391	* overhead.
	392	*/
	393	rt->rt_rmx.rmx_recvpipe =
	394	rt->rt_rmx.rmx_sendpipe = 3 * FAITHMTU;
	395	}
	396	}
	397
	398	/*
	399	* Process an ioctl request.
	400	*/
	401	/* ARGSUSED */
	402	static int
	403	faithioctl(ifp, cmd, data)
9bccf70c	404	struct ifnet *ifp;
1c79356b	405	u_long cmd;
9bccf70c	406	void* data;
1c79356b	407	{
9bccf70c A	408	struct ifaddr *ifa;
	409	struct ifreq ifr = (struct ifreq )data;
	410	int error = 0;
1c79356b A	411
	412	switch (cmd) {
	413
	414	case SIOCSIFADDR:
	415	ifp->if_flags \|= IFF_UP \| IFF_RUNNING;
	416	ifa = (struct ifaddr *)data;
	417	ifa->ifa_rtrequest = faithrtrequest;
	418	/*
	419	* Everything else is done at a higher level.
	420	*/
	421	break;
	422
	423	case SIOCADDMULTI:
	424	case SIOCDELMULTI:
	425	if (ifr == 0) {
	426	error = EAFNOSUPPORT; /* XXX */
	427	break;
	428	}
	429	switch (ifr->ifr_addr.sa_family) {
	430	#if INET
	431	case AF_INET:
	432	break;
	433	#endif
	434	#if INET6
	435	case AF_INET6:
	436	break;
	437	#endif
	438
	439	default:
	440	error = EAFNOSUPPORT;
	441	break;
	442	}
	443	break;
	444
	445	#ifdef SIOCSIFMTU
1c79356b A	446	case SIOCSIFMTU:
	447	ifp->if_mtu = ifr->ifr_mtu;
	448	break;
1c79356b A	449	#endif
	450
	451	case SIOCSIFFLAGS:
	452	break;
	453
	454	default:
	455	error = EINVAL;
	456	}
	457	return (error);
	458	}
9bccf70c A	459
	460	#if INET6
	461	/*
	462	* XXX could be slow
	463	* XXX could be layer violation to call sys/net from sys/netinet6
	464	*/
	465	int
	466	faithprefix(in6)
	467	struct in6_addr *in6;
	468	{
	469	struct rtentry *rt;
	470	struct sockaddr_in6 sin6;
	471	int ret;
	472
	473	if (ip6_keepfaith == 0)
	474	return 0;
	475
	476	bzero(&sin6, sizeof(sin6));
	477	sin6.sin6_family = AF_INET6;
	478	sin6.sin6_len = sizeof(struct sockaddr_in6);
	479	sin6.sin6_addr = *in6;
	480	rt = rtalloc1((struct sockaddr *)&sin6, 0, 0UL);
	481	if (rt && rt->rt_ifp && rt->rt_ifp->if_type == IFT_FAITH &&
	482	(rt->rt_ifp->if_flags & IFF_UP) != 0)
	483	ret = 1;
	484	else
	485	ret = 0;
	486	if (rt)
	487	rtfree(rt);
	488	return ret;
	489	}
	490	#endif
1c79356b	491	#endif /* NFAITH > 0 */