[apple/xnu.git] / bsd / net / ether_inet6_pr_module.c

/*
 * Copyright (c) 2000-2011 Apple 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 <sys/socketvar.h>
#include <kern/lock.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 <net/ndrv.h>
#include <net/kpi_protocol.h>
#include <net/dlil.h>

#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netinet/if_ether.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>

#if INET6
#include <netinet6/nd6.h>
#include <netinet6/in6_ifattach.h>
#endif

#if LLC && CCITT
extern struct ifqueue pkintrq;
#endif

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

#include <net/ether_if_module.h>

/*
 * Process a received Ethernet packet;
 * the packet is in the mbuf chain m without
 * the ether header, which is provided separately.
 */
static errno_t
ether_inet6_input(ifnet_t ifp, protocol_family_t protocol,
    mbuf_t packet, char *header)
{
#pragma unused(ifp, protocol)
	struct ether_header *eh = (struct ether_header *)(void *)header;
	u_int16_t ether_type;

	bcopy(&eh->ether_type, &ether_type, sizeof (ether_type));

	if (ether_type == htons(ETHERTYPE_IPV6)) {
		struct ifnet *mifp;
		/*
		 * Trust the ifp in the mbuf, rather than ifproto's
		 * since the packet could have been injected via
		 * a dlil_input_packet_list() using an ifp that is
		 * different than the one where the packet really
		 * came from.
		 */
		mifp = mbuf_pkthdr_rcvif(packet);

		/* Update L2 reachability record, if present (and not bcast) */
		if (bcmp(eh->ether_shost, etherbroadcastaddr,
		    ETHER_ADDR_LEN) != 0) {
			nd6_llreach_set_reachable(mifp, eh->ether_shost,
			    ETHER_ADDR_LEN);
		}

		if (proto_input(protocol, packet) != 0)
			m_freem(packet);
	} else {
		m_freem(packet);
	}

	return (EJUSTRETURN);
}

static errno_t
ether_inet6_pre_output(ifnet_t ifp, protocol_family_t protocol_family,
    mbuf_t *m0, const struct sockaddr *dst_netaddr, void *route,
    char *type, char *edst)
{
#pragma unused(protocol_family)
	errno_t	result;
	struct sockaddr_dl sdl;
	struct mbuf *m = *m0;

	/*
	 * Tell ether_frameout it's ok to loop packet if necessary
	 */
	m->m_flags |= M_LOOP;

	result = nd6_lookup_ipv6(ifp, (const struct sockaddr_in6 *)
	    (uintptr_t)(size_t)dst_netaddr, &sdl, sizeof (sdl), route, *m0);

	if (result == 0) {
		u_int16_t ethertype_ipv6 = htons(ETHERTYPE_IPV6);

		bcopy(&ethertype_ipv6, type, sizeof (ethertype_ipv6));
		bcopy(LLADDR(&sdl), edst, sdl.sdl_alen);
	}

	return (result);
}

static int
ether_inet6_resolve_multi(ifnet_t ifp, const struct sockaddr *proto_addr,
    struct sockaddr_dl *out_ll, size_t ll_len)
{
	static const size_t minsize =
	    offsetof(struct sockaddr_dl, sdl_data[0]) + ETHER_ADDR_LEN;
	const struct sockaddr_in6 *sin6 =
	    (const struct sockaddr_in6 *)(uintptr_t)(size_t)proto_addr;

	if (proto_addr->sa_family != AF_INET6)
		return (EAFNOSUPPORT);

	if (proto_addr->sa_len < sizeof (struct sockaddr_in6))
		return (EINVAL);

	if (ll_len < minsize)
		return (EMSGSIZE);

	bzero(out_ll, minsize);
	out_ll->sdl_len = minsize;
	out_ll->sdl_family = AF_LINK;
	out_ll->sdl_index = ifp->if_index;
	out_ll->sdl_type = IFT_ETHER;
	out_ll->sdl_nlen = 0;
	out_ll->sdl_alen = ETHER_ADDR_LEN;
	out_ll->sdl_slen = 0;
	ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, LLADDR(out_ll));

	return (0);
}

static errno_t
ether_inet6_prmod_ioctl(ifnet_t ifp, protocol_family_t protocol_family,
    u_long command, void *data)
{
#pragma unused(protocol_family)
	int error = 0;

	switch (command) {
	case SIOCSIFADDR:		/* struct ifaddr pointer */
		/*
		 * Note: caller of ifnet_ioctl() passes in pointer to
		 * struct ifaddr as parameter to SIOCSIFADDR, for legacy
		 * reasons.
		 */
		if ((ifp->if_flags & IFF_RUNNING) == 0) {
			ifnet_set_flags(ifp, IFF_UP, IFF_UP);
			ifnet_ioctl(ifp, 0, SIOCSIFFLAGS, NULL);
		}
		break;

	case SIOCGIFADDR: {		/* struct ifreq */
		struct ifreq *ifr = (struct ifreq *)(void *)data;

		(void) ifnet_lladdr_copy_bytes(ifp, ifr->ifr_addr.sa_data,
		    ETHER_ADDR_LEN);
		break;
	}

	default:
		error = EOPNOTSUPP;
		break;
	}
	return (error);
}

errno_t
ether_attach_inet6(struct ifnet *ifp, protocol_family_t protocol_family)
{
#pragma unused(protocol_family)
	struct ifnet_attach_proto_param	proto;
	struct ifnet_demux_desc demux[1];
	u_short en_6native = htons(ETHERTYPE_IPV6);
	errno_t	error;

	bzero(&proto, sizeof (proto));
	demux[0].type = DLIL_DESC_ETYPE2;
	demux[0].data = &en_6native;
	demux[0].datalen = sizeof (en_6native);
	proto.demux_list = demux;
	proto.demux_count = 1;
	proto.input = ether_inet6_input;
	proto.pre_output = ether_inet6_pre_output;
	proto.ioctl = ether_inet6_prmod_ioctl;
	proto.resolve = ether_inet6_resolve_multi;
	error = ifnet_attach_protocol(ifp, protocol_family, &proto);
	if (error && error != EEXIST) {
		printf("WARNING: %s can't attach ipv6 to %s%d\n", __func__,
		    ifp->if_name, ifp->if_unit);
	}

	return (error);
}

void
ether_detach_inet6(struct ifnet *ifp, protocol_family_t protocol_family)
{
	(void) ifnet_detach_protocol(ifp, protocol_family);
}
Commit	Line	Data
1c79356b	1	/*
6d2010ae	2	* Copyright (c) 2000-2011 Apple Inc. All rights reserved.
5d5c5d0d	3	*
2d21ac55	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
1c79356b	5	*
2d21ac55 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.
8f6c56a5	14	*
2d21ac55 A	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
8f6c56a5 A	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
8f6c56a5 A	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
2d21ac55 A	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
	24	* limitations under the License.
8f6c56a5	25	*
2d21ac55	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
1c79356b A	62	#include <sys/param.h>
	63	#include <sys/systm.h>
	64	#include <sys/kernel.h>
	65	#include <sys/malloc.h>
	66	#include <sys/mbuf.h>
	67	#include <sys/socket.h>
	68	#include <sys/sockio.h>
	69	#include <sys/sysctl.h>
6d2010ae	70	#include <sys/socketvar.h>
91447636	71	#include <kern/lock.h>
1c79356b A	72
1c79356b A	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>
	78	#include <net/ndrv.h>
91447636	79	#include <net/kpi_protocol.h>
6d2010ae	80	#include <net/dlil.h>
1c79356b A	81
	82	#include <netinet/in.h>
	83	#include <netinet/in_var.h>
	84	#include <netinet/if_ether.h>
	85	#include <netinet/in_systm.h>
	86	#include <netinet/ip.h>
	87
	88	#if INET6
	89	#include <netinet6/nd6.h>
	90	#include <netinet6/in6_ifattach.h>
	91	#endif
	92
1c79356b A	93	#if LLC && CCITT
	94	extern struct ifqueue pkintrq;
	95	#endif
	96
1c79356b A	97	/* #include "vlan.h" */
	98	#if NVLAN > 0
	99	#include <net/if_vlan_var.h>
	100	#endif /* NVLAN > 0 */
	101
2d21ac55	102	#include <net/ether_if_module.h>
1c79356b A	103
	104	/*
	105	* Process a received Ethernet packet;
	106	* the packet is in the mbuf chain m without
	107	* the ether header, which is provided separately.
	108	*/
91447636	109	static errno_t
6d2010ae A	110	ether_inet6_input(ifnet_t ifp, protocol_family_t protocol,
6d2010ae A	111	mbuf_t packet, char *header)
1c79356b	112	{
6d2010ae	113	#pragma unused(ifp, protocol)
316670eb A	114	struct ether_header eh = (struct ether_header )(void *)header;
316670eb A	115	u_int16_t ether_type;
6d2010ae	116
316670eb A	117	bcopy(&eh->ether_type, &ether_type, sizeof (ether_type));
	118
	119	if (ether_type == htons(ETHERTYPE_IPV6)) {
6d2010ae A	120	struct ifnet *mifp;
	121	/*
	122	* Trust the ifp in the mbuf, rather than ifproto's
	123	* since the packet could have been injected via
	124	* a dlil_input_packet_list() using an ifp that is
	125	* different than the one where the packet really
	126	* came from.
	127	*/
	128	mifp = mbuf_pkthdr_rcvif(packet);
	129
	130	/* Update L2 reachability record, if present (and not bcast) */
	131	if (bcmp(eh->ether_shost, etherbroadcastaddr,
	132	ETHER_ADDR_LEN) != 0) {
	133	nd6_llreach_set_reachable(mifp, eh->ether_shost,
	134	ETHER_ADDR_LEN);
	135	}
2d21ac55	136
6d2010ae A	137	if (proto_input(protocol, packet) != 0)
	138	m_freem(packet);
	139	} else {
2d21ac55	140	m_freem(packet);
6d2010ae A	141	}
	142
	143	return (EJUSTRETURN);
91447636	144	}
1c79356b	145
91447636	146	static errno_t
6d2010ae A	147	ether_inet6_pre_output(ifnet_t ifp, protocol_family_t protocol_family,
	148	mbuf_t m0, const struct sockaddr dst_netaddr, void *route,
	149	char type, char edst)
91447636	150	{
6d2010ae	151	#pragma unused(protocol_family)
91447636	152	errno_t result;
6d2010ae A	153	struct sockaddr_dl sdl;
6d2010ae A	154	struct mbuf m = m0;
1c79356b	155
91447636 A	156	/*
	157	* Tell ether_frameout it's ok to loop packet if necessary
	158	*/
	159	m->m_flags \|= M_LOOP;
6d2010ae	160
316670eb A	161	result = nd6_lookup_ipv6(ifp, (const struct sockaddr_in6 *)
316670eb A	162	(uintptr_t)(size_t)dst_netaddr, &sdl, sizeof (sdl), route, *m0);
6d2010ae	163
91447636	164	if (result == 0) {
316670eb A	165	u_int16_t ethertype_ipv6 = htons(ETHERTYPE_IPV6);
	166
	167	bcopy(&ethertype_ipv6, type, sizeof (ethertype_ipv6));
91447636	168	bcopy(LLADDR(&sdl), edst, sdl.sdl_alen);
1c79356b	169	}
1c79356b	170
6d2010ae	171	return (result);
1c79356b A	172	}
1c79356b A	173
91447636	174	static int
6d2010ae A	175	ether_inet6_resolve_multi(ifnet_t ifp, const struct sockaddr *proto_addr,
6d2010ae A	176	struct sockaddr_dl *out_ll, size_t ll_len)
1c79356b	177	{
6d2010ae A	178	static const size_t minsize =
	179	offsetof(struct sockaddr_dl, sdl_data[0]) + ETHER_ADDR_LEN;
	180	const struct sockaddr_in6 *sin6 =
316670eb	181	(const struct sockaddr_in6 *)(uintptr_t)(size_t)proto_addr;
6d2010ae	182
91447636	183	if (proto_addr->sa_family != AF_INET6)
6d2010ae A	184	return (EAFNOSUPPORT);
	185
	186	if (proto_addr->sa_len < sizeof (struct sockaddr_in6))
	187	return (EINVAL);
	188
91447636	189	if (ll_len < minsize)
6d2010ae A	190	return (EMSGSIZE);
6d2010ae A	191
91447636 A	192	bzero(out_ll, minsize);
	193	out_ll->sdl_len = minsize;
	194	out_ll->sdl_family = AF_LINK;
	195	out_ll->sdl_index = ifp->if_index;
	196	out_ll->sdl_type = IFT_ETHER;
	197	out_ll->sdl_nlen = 0;
	198	out_ll->sdl_alen = ETHER_ADDR_LEN;
	199	out_ll->sdl_slen = 0;
	200	ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, LLADDR(out_ll));
1c79356b	201
6d2010ae A	202	return (0);
6d2010ae A	203	}
1c79356b	204
91447636	205	static errno_t
6d2010ae A	206	ether_inet6_prmod_ioctl(ifnet_t ifp, protocol_family_t protocol_family,
6d2010ae A	207	u_long command, void *data)
1c79356b	208	{
6d2010ae	209	#pragma unused(protocol_family)
6d2010ae	210	int error = 0;
1c79356b	211
2d21ac55	212	switch (command) {
316670eb A	213	case SIOCSIFADDR: /* struct ifaddr pointer */
	214	/*
	215	* Note: caller of ifnet_ioctl() passes in pointer to
	216	* struct ifaddr as parameter to SIOCSIFADDR, for legacy
	217	* reasons.
	218	*/
2d21ac55 A	219	if ((ifp->if_flags & IFF_RUNNING) == 0) {
	220	ifnet_set_flags(ifp, IFF_UP, IFF_UP);
	221	ifnet_ioctl(ifp, 0, SIOCSIFFLAGS, NULL);
	222	}
	223	break;
1c79356b	224
316670eb A	225	case SIOCGIFADDR: { /* struct ifreq */
	226	struct ifreq ifr = (struct ifreq )(void *)data;
	227
6d2010ae A	228	(void) ifnet_lladdr_copy_bytes(ifp, ifr->ifr_addr.sa_data,
	229	ETHER_ADDR_LEN);
	230	break;
316670eb	231	}
1c79356b	232
6d2010ae A	233	default:
	234	error = EOPNOTSUPP;
	235	break;
	236	}
	237	return (error);
1c79356b A	238	}
1c79356b A	239
2d21ac55	240	errno_t
6d2010ae	241	ether_attach_inet6(struct ifnet *ifp, protocol_family_t protocol_family)
1c79356b	242	{
6d2010ae	243	#pragma unused(protocol_family)
91447636 A	244	struct ifnet_attach_proto_param proto;
91447636 A	245	struct ifnet_demux_desc demux[1];
6d2010ae	246	u_short en_6native = htons(ETHERTYPE_IPV6);
91447636	247	errno_t error;
6d2010ae A	248
6d2010ae A	249	bzero(&proto, sizeof (proto));
91447636 A	250	demux[0].type = DLIL_DESC_ETYPE2;
91447636 A	251	demux[0].data = &en_6native;
6d2010ae	252	demux[0].datalen = sizeof (en_6native);
91447636 A	253	proto.demux_list = demux;
91447636 A	254	proto.demux_count = 1;
2d21ac55 A	255	proto.input = ether_inet6_input;
2d21ac55 A	256	proto.pre_output = ether_inet6_pre_output;
91447636 A	257	proto.ioctl = ether_inet6_prmod_ioctl;
	258	proto.resolve = ether_inet6_resolve_multi;
	259	error = ifnet_attach_protocol(ifp, protocol_family, &proto);
	260	if (error && error != EEXIST) {
6d2010ae A	261	printf("WARNING: %s can't attach ipv6 to %s%d\n", __func__,
6d2010ae A	262	ifp->if_name, ifp->if_unit);
91447636	263	}
6d2010ae A	264
6d2010ae A	265	return (error);
1c79356b	266	}
9bccf70c	267
2d21ac55	268	void
6d2010ae	269	ether_detach_inet6(struct ifnet *ifp, protocol_family_t protocol_family)
9bccf70c	270	{
6d2010ae	271	(void) ifnet_detach_protocol(ifp, protocol_family);
9bccf70c	272	}