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

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_OSREFERENCE_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_LICENSE_OSREFERENCE_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/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(struct ifnet *, u_long, void*);
int faith_pre_output(struct ifnet *, register struct mbuf **,
	const struct sockaddr *, caddr_t, char *, char *, u_long);
static void faithrtrequest(int, struct rtentry *, struct sockaddr *);

void faithattach(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;
       
        }
    }

	bzero(&reg, sizeof(reg));
	bzero(&desc, sizeof(desc));
    TAILQ_INIT(&reg.demux_desc_head); 
    desc.type = DLIL_DESC_RAW;
    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.pre_output       = faith_pre_output;
    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;
	const struct sockaddr *dst;
	caddr_t			 route_entry;
	char		     *frame_type;
	char		     *dst_addr;
	u_long		     dl_tag;
{
	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;
	m->m_pkthdr.rcvif = ifp;
	proto_inject(dst->sa_family, m);
	ifp->if_ipackets++;
	ifp->if_ibytes += m->m_pkthdr.len;
	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:
		ifnet_set_flags(ifp, IFF_UP | IFF_RUNNING, 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	1	/*
5d5c5d0d A	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
5d5c5d0d A	3	*
8ad349bb	4	* @APPLE_LICENSE_OSREFERENCE_HEADER_START@
1c79356b	5	*
8ad349bb 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
	10	* License may not be used to create, or enable the creation or
	11	* redistribution of, unlawful or unlicensed copies of an Apple operating
	12	* system, or to circumvent, violate, or enable the circumvention or
	13	* violation of, any terms of an Apple operating system software license
	14	* agreement.
	15	*
	16	* Please obtain a copy of the License at
	17	* http://www.opensource.apple.com/apsl/ and read it before using this
	18	* file.
	19	*
	20	* The Original Code and all software distributed under the License are
	21	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	22	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	23	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	24	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	25	* Please see the License for the specific language governing rights and
	26	* limitations under the License.
	27	*
	28	* @APPLE_LICENSE_OSREFERENCE_HEADER_END@
1c79356b	29	*/
9bccf70c	30	/* $KAME: if_faith.c,v 1.21 2001/02/20 07:59:26 itojun Exp $ */
1c79356b A	31
	32	/*
	33	* Copyright (c) 1982, 1986, 1993
	34	* The Regents of the University of California. All rights reserved.
	35	*
	36	* Redistribution and use in source and binary forms, with or without
	37	* modification, are permitted provided that the following conditions
	38	* are met:
	39	* 1. Redistributions of source code must retain the above copyright
	40	* notice, this list of conditions and the following disclaimer.
	41	* 2. Redistributions in binary form must reproduce the above copyright
	42	* notice, this list of conditions and the following disclaimer in the
	43	* documentation and/or other materials provided with the distribution.
	44	* 3. All advertising materials mentioning features or use of this software
	45	* must display the following acknowledgement:
	46	* This product includes software developed by the University of
	47	* California, Berkeley and its contributors.
	48	* 4. Neither the name of the University nor the names of its contributors
	49	* may be used to endorse or promote products derived from this software
	50	* without specific prior written permission.
	51	*
	52	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	53	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	54	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	55	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	56	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	57	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	58	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	59	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	60	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	61	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	62	* SUCH DAMAGE.
9bccf70c A	63	*
9bccf70c A	64	* $FreeBSD: src/sys/net/if_faith.c,v 1.3.2.2 2001/07/05 14:46:25 ume Exp $
1c79356b A	65	*/
	66	/*
	67	* derived from
	68	* @(#)if_loop.c 8.1 (Berkeley) 6/10/93
	69	* Id: if_loop.c,v 1.22 1996/06/19 16:24:10 wollman Exp
	70	*/
	71
	72	/*
	73	* Loopback interface driver for protocol testing and timing.
	74	*/
1c79356b A	75
	76	#include "faith.h"
	77	#if NFAITH > 0
	78
	79	#include <sys/param.h>
	80	#include <sys/systm.h>
	81	#include <sys/kernel.h>
	82	#include <sys/mbuf.h>
	83	#include <sys/socket.h>
	84	#include <sys/errno.h>
1c79356b	85	#include <sys/sockio.h>
1c79356b	86	#include <sys/time.h>
9bccf70c	87	#include <sys/queue.h>
1c79356b A	88
	89	#include <net/if.h>
	90	#include <net/if_types.h>
1c79356b A	91	#include <net/route.h>
1c79356b A	92	#include <net/bpf.h>
9bccf70c	93	#include <net/if_faith.h>
1c79356b A	94
	95	#if INET
	96	#include <netinet/in.h>
	97	#include <netinet/in_systm.h>
	98	#include <netinet/in_var.h>
	99	#include <netinet/ip.h>
	100	#endif
	101
	102	#if INET6
	103	#ifndef INET
	104	#include <netinet/in.h>
	105	#endif
	106	#include <netinet6/in6_var.h>
	107	#include <netinet/ip6.h>
9bccf70c	108	#include <netinet6/ip6_var.h>
1c79356b A	109	#endif
	110
	111	#include <net/dlil.h>
9bccf70c	112	#include "bpf.h"
1c79356b A	113
	114	#include <net/net_osdep.h>
	115
91447636 A	116	static int faithioctl(struct ifnet , u_long, void);
	117	int faith_pre_output(struct ifnet , register struct mbuf *,
	118	const struct sockaddr , caddr_t, char , char *, u_long);
	119	static void faithrtrequest(int, struct rtentry , struct sockaddr );
1c79356b	120
91447636	121	void faithattach(void);
9bccf70c A	122	#ifndef __APPLE__
9bccf70c A	123	PSEUDO_SET(faithattach, if_faith);
1c79356b A	124	#endif
1c79356b A	125
1c79356b A	126	static struct ifnet faithif[NFAITH];
	127	static struct if_proto *faith_array[NFAITH];
	128	static int faith_count = 0;
	129
	130	#define FAITHMTU 1500
	131
	132	static
	133	int faith_add_if(struct ifnet *ifp)
	134	{
	135	ifp->if_demux = 0;
	136	ifp->if_framer = 0;
	137	return 0;
	138	}
	139
	140	static
	141	int faith_del_if(struct ifnet *ifp)
	142	{
	143	return 0;
	144	}
	145
	146	static
	147	int faith_add_proto(struct ddesc_head_str desc_head, struct if_proto proto, u_long dl_tag)
	148	{
	149	int i;
	150
	151	for (i=0; i < faith_count; i++)
	152	if (faith_array[i] == 0) {
	153	faith_array[faith_count] = proto;
	154	return 0;
	155	}
	156
	157	if ((i == faith_count) && (faith_count == NFAITH))
	158	panic("faith_add_proto -- Too many attachments\n");
	159
	160	faith_array[faith_count++] = proto;
	161
	162	return (0);
	163	}
	164
	165	static
	166	int faith_del_proto(struct if_proto *proto, u_long dl_tag)
	167	{
	168	int i;
	169
	170
	171	for (i=0; i < faith_count; i++)
	172	if (faith_array[i] == proto) {
	173	faith_array[i] = 0;
	174	return 0;
	175	}
	176
	177	return ENOENT;
	178	}
	179
	180	int faith_shutdown()
	181	{
	182	return 0;
	183	}
	184
55e303ae	185	int faith_attach_inet(struct ifnet ifp, u_long dl_tag)
1c79356b A	186	{
	187	struct dlil_proto_reg_str reg;
	188	struct dlil_demux_desc desc;
1c79356b A	189	short native=0;
	190	int stat;
	191	int i;
	192
	193	for (i=0; i < faith_count; i++) {
	194	if (faith_array[i] && (faith_array[i]->ifp == ifp) &&
	195	(faith_array[i]->protocol_family == PF_INET)) {
	196	#if 0
	197	kprintf("faith_array for %s%d found dl_tag=%d\n",
	198	ifp->if_name, ifp->if_unit, faith_array[i]->dl_tag);
	199	#endif
55e303ae A	200	*dl_tag = faith_array[i]->dl_tag;
55e303ae A	201	return 0;
1c79356b A	202
	203	}
	204	}
	205
91447636 A	206	bzero(&reg, sizeof(reg));
91447636 A	207	bzero(&desc, sizeof(desc));
1c79356b A	208	TAILQ_INIT(&reg.demux_desc_head);
1c79356b A	209	desc.type = DLIL_DESC_RAW;
1c79356b A	210	desc.native_type = (char *) &native;
	211	TAILQ_INSERT_TAIL(&reg.demux_desc_head, &desc, next);
	212	reg.interface_family = ifp->if_family;
	213	reg.unit_number = ifp->if_unit;
1c79356b	214	reg.pre_output = faith_pre_output;
1c79356b A	215	reg.protocol_family = PF_INET;
1c79356b A	216
55e303ae	217	stat = dlil_attach_protocol(&reg, dl_tag);
1c79356b A	218	if (stat) {
	219	panic("faith_attach_inet can't attach interface\n");
	220	}
	221
55e303ae	222	return stat;
1c79356b A	223	}
1c79356b A	224
55e303ae A	225	void faith_reg_if_mods()
	226	{
	227	struct dlil_ifmod_reg_str faith_ifmod;
	228	struct dlil_protomod_reg_str faith_protoreg;
	229	int error;
	230
	231	bzero(&faith_ifmod, sizeof(faith_ifmod));
	232	faith_ifmod.add_if = faith_add_if;
	233	faith_ifmod.del_if = faith_del_if;
	234	faith_ifmod.add_proto = faith_add_proto;
	235	faith_ifmod.del_proto = faith_del_proto;
	236	faith_ifmod.ifmod_ioctl = 0;
	237	faith_ifmod.shutdown = faith_shutdown;
	238
	239
	240	if (dlil_reg_if_modules(APPLE_IF_FAM_FAITH, &faith_ifmod))
	241	panic("Couldn't register faith modules\n");
	242
	243	/* Register protocol registration functions */
	244
	245	bzero(&faith_protoreg, sizeof(faith_protoreg));
	246	faith_protoreg.attach_proto = faith_attach_inet;
	247	faith_protoreg.detach_proto = 0;
	248
	249	if ( error = dlil_reg_proto_module(PF_INET, APPLE_IF_FAM_FAITH, &faith_protoreg) != 0)
	250	kprintf("dlil_reg_proto_module failed for AF_INET error=%d\n", error);
	251
	252
	253	}
	254
1c79356b	255	void
9bccf70c	256	faithattach(void)
1c79356b A	257	{
	258	struct ifnet *ifp;
	259	int i;
	260
	261	faith_reg_if_mods(); /* DLIL modules */
	262
	263	for (i = 0; i < NFAITH; i++) {
	264	ifp = &faithif[i];
	265	bzero(ifp, sizeof(faithif[i]));
	266	ifp->if_name = "faith";
	267	ifp->if_unit = i;
	268	ifp->if_family = APPLE_IF_FAM_FAITH;
	269	ifp->if_mtu = FAITHMTU;
9bccf70c A	270	/* LOOPBACK commented out to announce IPv6 routes to faith */
9bccf70c A	271	ifp->if_flags = /* IFF_LOOPBACK \| */ IFF_MULTICAST;
1c79356b A	272	ifp->if_ioctl = faithioctl;
	273	ifp->if_output = NULL;
	274	ifp->if_type = IFT_FAITH;
	275	ifp->if_hdrlen = 0;
	276	ifp->if_addrlen = 0;
	277	dlil_if_attach(ifp);
	278	#if NBPFILTER > 0
	279	#ifdef HAVE_OLD_BPF
	280	bpfattach(ifp, DLT_NULL, sizeof(u_int));
	281	#else
	282	bpfattach(&ifp->if_bpf, ifp, DLT_NULL, sizeof(u_int));
	283	#endif
	284	#endif
	285	}
	286	}
	287
	288	int
9bccf70c	289	faith_pre_output(ifp, m0, dst, route_entry, frame_type, dst_addr, dl_tag)
1c79356b A	290	struct ifnet *ifp;
1c79356b A	291	register struct mbuf **m0;
91447636	292	const struct sockaddr *dst;
9bccf70c	293	caddr_t route_entry;
1c79356b A	294	char *frame_type;
	295	char *dst_addr;
	296	u_long dl_tag;
	297	{
1c79356b	298	register struct mbuf m = m0;
9bccf70c	299	struct rtentry rt = (struct rtentry)route_entry;
1c79356b A	300
	301	if ((m->m_flags & M_PKTHDR) == 0)
	302	panic("faithoutput no HDR");
	303	#if NBPFILTER > 0
	304	/* BPF write needs to be handled specially */
	305	if (dst && dst->sa_family == AF_UNSPEC) {
	306	dst->sa_family = (mtod(m, int ));
	307	m->m_len -= sizeof(int);
	308	m->m_pkthdr.len -= sizeof(int);
	309	m->m_data += sizeof(int);
	310	}
	311
	312	if (ifp->if_bpf) {
	313	/*
	314	* We need to prepend the address family as
	315	* a four byte field. Cons up a faith header
	316	* to pacify bpf. This is safe because bpf
	317	* will only read from the mbuf (i.e., it won't
	318	* try to free it or keep a pointer a to it).
	319	*/
	320	struct mbuf m0;
9bccf70c	321	u_int32_t af = dst->sa_family;
1c79356b A	322
	323	m0.m_next = m;
	324	m0.m_len = 4;
	325	m0.m_data = (char *)⁡
	326
9bccf70c	327	#ifdef HAVE_OLD_BPF
1c79356b A	328	bpf_mtap(ifp, &m0);
	329	#else
	330	bpf_mtap(ifp->if_bpf, &m0);
	331	#endif
	332	}
	333	#endif
	334
	335	if (rt && rt->rt_flags & (RTF_REJECT\|RTF_BLACKHOLE)) {
9bccf70c A	336	return (rt->rt_flags & RTF_BLACKHOLE ? 0 :
9bccf70c A	337	rt->rt_flags & RTF_HOST ? EHOSTUNREACH : ENETUNREACH);
1c79356b A	338	}
	339	ifp->if_opackets++;
	340	ifp->if_obytes += m->m_pkthdr.len;
1c79356b	341	m->m_pkthdr.rcvif = ifp;
91447636	342	proto_inject(dst->sa_family, m);
1c79356b A	343	ifp->if_ipackets++;
1c79356b A	344	ifp->if_ibytes += m->m_pkthdr.len;
1c79356b A	345	return (EJUSTRETURN);
	346	}
	347
	348	/* ARGSUSED */
	349	static void
	350	faithrtrequest(cmd, rt, sa)
	351	int cmd;
	352	struct rtentry *rt;
	353	struct sockaddr *sa;
	354	{
	355	if (rt) {
	356	rt->rt_rmx.rmx_mtu = rt->rt_ifp->if_mtu; /* for ISO */
	357	/*
	358	* For optimal performance, the send and receive buffers
	359	* should be at least twice the MTU plus a little more for
	360	* overhead.
	361	*/
	362	rt->rt_rmx.rmx_recvpipe =
	363	rt->rt_rmx.rmx_sendpipe = 3 * FAITHMTU;
	364	}
	365	}
	366
	367	/*
	368	* Process an ioctl request.
	369	*/
	370	/* ARGSUSED */
	371	static int
	372	faithioctl(ifp, cmd, data)
9bccf70c	373	struct ifnet *ifp;
1c79356b	374	u_long cmd;
9bccf70c	375	void* data;
1c79356b	376	{
9bccf70c A	377	struct ifaddr *ifa;
	378	struct ifreq ifr = (struct ifreq )data;
	379	int error = 0;
1c79356b A	380
	381	switch (cmd) {
	382
	383	case SIOCSIFADDR:
91447636	384	ifnet_set_flags(ifp, IFF_UP \| IFF_RUNNING, IFF_UP \| IFF_RUNNING);
1c79356b A	385	ifa = (struct ifaddr *)data;
	386	ifa->ifa_rtrequest = faithrtrequest;
	387	/*
	388	* Everything else is done at a higher level.
	389	*/
	390	break;
	391
	392	case SIOCADDMULTI:
	393	case SIOCDELMULTI:
	394	if (ifr == 0) {
	395	error = EAFNOSUPPORT; /* XXX */
	396	break;
	397	}
	398	switch (ifr->ifr_addr.sa_family) {
	399	#if INET
	400	case AF_INET:
	401	break;
	402	#endif
	403	#if INET6
	404	case AF_INET6:
	405	break;
	406	#endif
	407
	408	default:
	409	error = EAFNOSUPPORT;
	410	break;
	411	}
	412	break;
	413
	414	#ifdef SIOCSIFMTU
1c79356b A	415	case SIOCSIFMTU:
	416	ifp->if_mtu = ifr->ifr_mtu;
	417	break;
1c79356b A	418	#endif
	419
	420	case SIOCSIFFLAGS:
	421	break;
	422
	423	default:
	424	error = EINVAL;
	425	}
	426	return (error);
	427	}
9bccf70c A	428
	429	#if INET6
	430	/*
	431	* XXX could be slow
	432	* XXX could be layer violation to call sys/net from sys/netinet6
	433	*/
	434	int
	435	faithprefix(in6)
	436	struct in6_addr *in6;
	437	{
	438	struct rtentry *rt;
	439	struct sockaddr_in6 sin6;
	440	int ret;
	441
	442	if (ip6_keepfaith == 0)
	443	return 0;
	444
	445	bzero(&sin6, sizeof(sin6));
	446	sin6.sin6_family = AF_INET6;
	447	sin6.sin6_len = sizeof(struct sockaddr_in6);
	448	sin6.sin6_addr = *in6;
	449	rt = rtalloc1((struct sockaddr *)&sin6, 0, 0UL);
	450	if (rt && rt->rt_ifp && rt->rt_ifp->if_type == IFT_FAITH &&
	451	(rt->rt_ifp->if_flags & IFF_UP) != 0)
	452	ret = 1;
	453	else
	454	ret = 0;
	455	if (rt)
	456	rtfree(rt);
	457	return ret;
	458	}
	459	#endif
1c79356b	460	#endif /* NFAITH > 0 */