[apple/xnu.git] / bsd / net / if_ethersubr.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@
 */
/*
 * 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.
 *
 *	@(#)if_ethersubr.c	8.1 (Berkeley) 6/10/93
 * $FreeBSD: src/sys/net/if_ethersubr.c,v 1.70.2.17 2001/08/01 00:47:49 fenner Exp $
 */

#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/netisr.h>
#include <net/route.h>
#include <net/if_llc.h>
#include <net/if_dl.h>
#include <net/if_types.h>

#if INET || INET6
#include <netinet/in.h>
#include <netinet/in_var.h>
#include <netinet/if_ether.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#endif

#if IPX
#include <netipx/ipx.h>
#include <netipx/ipx_if.h>
#endif

#include <sys/socketvar.h>

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

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

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

static	int ether_resolvemulti __P((struct ifnet *, struct sockaddr **, 
				    struct sockaddr *));
extern u_char	etherbroadcastaddr[];
#define senderr(e) do { error = (e); goto bad;} while (0)
#define IFP2AC(IFP) ((struct arpcom *)IFP)

/*
 * Perform common duties while attaching to interface list
 */


/* 
    IONetworkingFamily should call dlil_if_attach
    ether_ifattach becomes obsolete, but remains for
    temporary compatibility with third parties extensions
*/
void
ether_ifattach(ifp)
	register struct ifnet *ifp;
{
	boolean_t funnel_state;

	funnel_state = thread_funnel_set(network_flock, TRUE);

	ifp->if_name = "en";
	ifp->if_family = APPLE_IF_FAM_ETHERNET;
	ifp->if_type = IFT_ETHER;
	ifp->if_addrlen = 6;
	ifp->if_hdrlen = 14;
	ifp->if_mtu = ETHERMTU;
	ifp->if_resolvemulti = ether_resolvemulti;
	if (ifp->if_baudrate == 0)
	    ifp->if_baudrate = 10000000;

	dlil_if_attach(ifp);
	(void) thread_funnel_set(network_flock, funnel_state);
}

SYSCTL_DECL(_net_link);
SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW, 0, "Ethernet");

int
ether_resolvemulti(ifp, llsa, sa)
	struct ifnet *ifp;
	struct sockaddr **llsa;
	struct sockaddr *sa;
{
	struct sockaddr_dl *sdl;
	struct sockaddr_in *sin;
	u_char *e_addr;
#if INET6
        struct sockaddr_in6 *sin6;
#endif


	switch(sa->sa_family) {
	case AF_UNSPEC:
		/* AppleTalk uses AF_UNSPEC for multicast registration.
		 * No mapping needed. Just check that it's a valid MC address.
		 */
		e_addr = &sa->sa_data[0];
		if ((e_addr[0] & 1) != 1)
			return EADDRNOTAVAIL;
		*llsa = 0;
		return 0;

	case AF_LINK:
		/* 
		 * No mapping needed. Just check that it's a valid MC address.
		 */
		sdl = (struct sockaddr_dl *)sa;
		e_addr = LLADDR(sdl);
		if ((e_addr[0] & 1) != 1)
			return EADDRNOTAVAIL;
		*llsa = 0;
		return 0;

#if INET
	case AF_INET:
		sin = (struct sockaddr_in *)sa;
		if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
			return EADDRNOTAVAIL;
		MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR,
		       M_WAITOK);
		sdl->sdl_len = sizeof *sdl;
		sdl->sdl_family = AF_LINK;
		sdl->sdl_index = ifp->if_index;
		sdl->sdl_type = IFT_ETHER;
		sdl->sdl_nlen = 0;
		sdl->sdl_alen = ETHER_ADDR_LEN;
		sdl->sdl_slen = 0;
		e_addr = LLADDR(sdl);
		ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr);
		*llsa = (struct sockaddr *)sdl;
		return 0;
#endif
#if INET6
        case AF_INET6:
                sin6 = (struct sockaddr_in6 *)sa;
                if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
                        /*
                         * An IP6 address of 0 means listen to all
                         * of the Ethernet multicast address used for IP6.
                         * (This is used for multicast routers.)
                         */
                        ifp->if_flags |= IFF_ALLMULTI;
                        *llsa = 0;
                        return 0;
                }
                MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR,
                       M_WAITOK);
                sdl->sdl_len = sizeof *sdl;
                sdl->sdl_family = AF_LINK;
                sdl->sdl_index = ifp->if_index;
                sdl->sdl_type = IFT_ETHER;
                sdl->sdl_nlen = 0;
                sdl->sdl_alen = ETHER_ADDR_LEN;
                sdl->sdl_slen = 0;
                e_addr = LLADDR(sdl);
                ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr);
                kprintf("ether_resolvemulti Adding %x:%x:%x:%x:%x:%x\n",
                                e_addr[0], e_addr[1], e_addr[2], e_addr[3], e_addr[4], e_addr[5]);
                *llsa = (struct sockaddr *)sdl;
                return 0;
#endif

	default:
		/* 
		 * Well, the text isn't quite right, but it's the name
		 * that counts...
		 */
		return EAFNOSUPPORT;
	}
}


u_char	ether_ipmulticast_min[6] = { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 };
u_char	ether_ipmulticast_max[6] = { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff };
/*
 * Add an Ethernet multicast address or range of addresses to the list for a
 * given interface.
 */
int
ether_addmulti(ifr, ac)
	struct ifreq *ifr;
	register struct arpcom *ac;
{
	register struct ether_multi *enm;
	struct sockaddr_in *sin;
	u_char addrlo[6];
	u_char addrhi[6];
	int s = splimp();

	switch (ifr->ifr_addr.sa_family) {

	case AF_UNSPEC:
		bcopy(ifr->ifr_addr.sa_data, addrlo, 6);
		bcopy(addrlo, addrhi, 6);
		break;

#if INET
	case AF_INET:
		sin = (struct sockaddr_in *)&(ifr->ifr_addr);
		if (sin->sin_addr.s_addr == INADDR_ANY) {
			/*
			 * An IP address of INADDR_ANY means listen to all
			 * of the Ethernet multicast addresses used for IP.
			 * (This is for the sake of IP multicast routers.)
			 */
			bcopy(ether_ipmulticast_min, addrlo, 6);
			bcopy(ether_ipmulticast_max, addrhi, 6);
		}
		else {
			ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo);
			bcopy(addrlo, addrhi, 6);
		}
		break;
#endif

	default:
		splx(s);
		return (EAFNOSUPPORT);
	}

	/*
	 * Verify that we have valid Ethernet multicast addresses.
	 */
	if ((addrlo[0] & 0x01) != 1 || (addrhi[0] & 0x01) != 1) {
		splx(s);
		return (EINVAL);
	}
	/*
	 * See if the address range is already in the list.
	 */
	ETHER_LOOKUP_MULTI(addrlo, addrhi, ac, enm);
	if (enm != NULL) {
		/*
		 * Found it; just increment the reference count.
		 */
		++enm->enm_refcount;
		splx(s);
		return (0);
	}
	/*
	 * New address or range; malloc a new multicast record
	 * and link it into the interface's multicast list.
	 */
	enm = (struct ether_multi *)_MALLOC(sizeof(*enm), M_IFMADDR, M_WAITOK);
	if (enm == NULL) {
		splx(s);
		return (ENOBUFS);
	}
	bcopy(addrlo, enm->enm_addrlo, 6);
	bcopy(addrhi, enm->enm_addrhi, 6);
	enm->enm_ac = ac;
	enm->enm_refcount = 1;
	enm->enm_next = ac->ac_multiaddrs;
	ac->ac_multiaddrs = enm;
	splx(s);
	/*
	 * Return ENETRESET to inform the driver that the list has changed
	 * and its reception filter should be adjusted accordingly.
	 */
	return (ENETRESET);
}

/*
 * Delete a multicast address record.
 */
int
ether_delmulti(ifr, ac, ret_mca)
	struct ifreq *ifr;
	register struct arpcom *ac;
	struct ether_addr * ret_mca;
{
	register struct ether_multi *enm;
	register struct ether_multi **p;
	struct sockaddr_in *sin;
	u_char addrlo[6];
	u_char addrhi[6];
	int s = splimp();

	switch (ifr->ifr_addr.sa_family) {

	case AF_UNSPEC:
		bcopy(ifr->ifr_addr.sa_data, addrlo, 6);
		bcopy(addrlo, addrhi, 6);
		break;

#if INET
	case AF_INET:
		sin = (struct sockaddr_in *)&(ifr->ifr_addr);
		if (sin->sin_addr.s_addr == INADDR_ANY) {
			/*
			 * An IP address of INADDR_ANY means stop listening
			 * to the range of Ethernet multicast addresses used
			 * for IP.
			 */
			bcopy(ether_ipmulticast_min, addrlo, 6);
			bcopy(ether_ipmulticast_max, addrhi, 6);
		}
		else {
			ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo);
			bcopy(addrlo, addrhi, 6);
		}
		break;
#endif

	default:
		splx(s);
		return (EAFNOSUPPORT);
	}

	/*
	 * Look up the address in our list.
	 */
	ETHER_LOOKUP_MULTI(addrlo, addrhi, ac, enm);
	if (enm == NULL) {
		splx(s);
		return (ENXIO);
	}
	if (--enm->enm_refcount != 0) {
		/*
		 * Still some claims to this record.
		 */
		splx(s);
		return (0);
	}

	/* save the low and high address of the range before deletion */
	if (ret_mca) {
	   	*ret_mca	= *((struct ether_addr *)addrlo);
	   	*(ret_mca + 1)	= *((struct ether_addr *)addrhi);
	}

	/*
	 * No remaining claims to this record; unlink and free it.
	 */
	for (p = &enm->enm_ac->ac_multiaddrs;
	     *p != enm;
	     p = &(*p)->enm_next)
		continue;
	*p = (*p)->enm_next;
	FREE(enm, M_IFMADDR);
	splx(s);
	/*
	 * Return ENETRESET to inform the driver that the list has changed
	 * and its reception filter should be adjusted accordingly.
	 */
	return (ENETRESET);
}

/*
 * Convert Ethernet address to printable (loggable) representation.
 */
static u_char digits[] = "0123456789abcdef";
char *
ether_sprintf(p, ap)
	register u_char *p;
        register u_char *ap;
{	register char *cp;
        register i;

        for (cp = p, i = 0; i < 6; i++) {
                *cp++ = digits[*ap >> 4];
                *cp++ = digits[*ap++ & 0xf];
                *cp++ = ':';
        }
        *--cp = 0;
        return (p);
}
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	*/
	25	/*
	26	* Copyright (c) 1982, 1989, 1993
	27	* The Regents of the University of California. All rights reserved.
	28	*
	29	* Redistribution and use in source and binary forms, with or without
	30	* modification, are permitted provided that the following conditions
	31	* are met:
	32	* 1. Redistributions of source code must retain the above copyright
	33	* notice, this list of conditions and the following disclaimer.
	34	* 2. Redistributions in binary form must reproduce the above copyright
	35	* notice, this list of conditions and the following disclaimer in the
	36	* documentation and/or other materials provided with the distribution.
	37	* 3. All advertising materials mentioning features or use of this software
	38	* must display the following acknowledgement:
	39	* This product includes software developed by the University of
	40	* California, Berkeley and its contributors.
	41	* 4. Neither the name of the University nor the names of its contributors
	42	* may be used to endorse or promote products derived from this software
	43	* without specific prior written permission.
	44	*
	45	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	46	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	47	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	48	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	49	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	50	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	51	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	52	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	53	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	54	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	55	* SUCH DAMAGE.
	56	*
	57	* @(#)if_ethersubr.c 8.1 (Berkeley) 6/10/93
9bccf70c	58	* $FreeBSD: src/sys/net/if_ethersubr.c,v 1.70.2.17 2001/08/01 00:47:49 fenner Exp $
1c79356b A	59	*/
1c79356b A	60
1c79356b A	61	#include <sys/param.h>
	62	#include <sys/systm.h>
	63	#include <sys/kernel.h>
	64	#include <sys/malloc.h>
	65	#include <sys/mbuf.h>
	66	#include <sys/socket.h>
	67	#include <sys/sockio.h>
	68	#include <sys/sysctl.h>
	69
	70	#include <net/if.h>
	71	#include <net/netisr.h>
	72	#include <net/route.h>
	73	#include <net/if_llc.h>
	74	#include <net/if_dl.h>
	75	#include <net/if_types.h>
1c79356b	76
9bccf70c	77	#if INET \|\| INET6
1c79356b A	78	#include <netinet/in.h>
	79	#include <netinet/in_var.h>
	80	#include <netinet/if_ether.h>
	81	#include <netinet/in_systm.h>
	82	#include <netinet/ip.h>
	83	#endif
	84
	85	#if IPX
	86	#include <netipx/ipx.h>
	87	#include <netipx/ipx_if.h>
	88	#endif
	89
1c79356b A	90	#include <sys/socketvar.h>
	91
	92	#if LLC && CCITT
	93	extern struct ifqueue pkintrq;
	94	#endif
	95
	96	#if BRIDGE
	97	#include <net/bridge.h>
	98	#endif
	99
	100	/* #include "vlan.h" */
	101	#if NVLAN > 0
	102	#include <net/if_vlan_var.h>
	103	#endif /* NVLAN > 0 */
	104
	105	static int ether_resolvemulti __P((struct ifnet , struct sockaddr *,
	106	struct sockaddr *));
	107	extern u_char etherbroadcastaddr[];
	108	#define senderr(e) do { error = (e); goto bad;} while (0)
	109	#define IFP2AC(IFP) ((struct arpcom *)IFP)
	110
	111	/*
	112	* Perform common duties while attaching to interface list
	113	*/
	114
	115
9bccf70c A	116	/*
	117	IONetworkingFamily should call dlil_if_attach
	118	ether_ifattach becomes obsolete, but remains for
	119	temporary compatibility with third parties extensions
	120	*/
1c79356b A	121	void
	122	ether_ifattach(ifp)
	123	register struct ifnet *ifp;
	124	{
1c79356b A	125	boolean_t funnel_state;
	126
	127	funnel_state = thread_funnel_set(network_flock, TRUE);
1c79356b A	128
	129	ifp->if_name = "en";
	130	ifp->if_family = APPLE_IF_FAM_ETHERNET;
	131	ifp->if_type = IFT_ETHER;
	132	ifp->if_addrlen = 6;
	133	ifp->if_hdrlen = 14;
	134	ifp->if_mtu = ETHERMTU;
	135	ifp->if_resolvemulti = ether_resolvemulti;
	136	if (ifp->if_baudrate == 0)
	137	ifp->if_baudrate = 10000000;
	138
	139	dlil_if_attach(ifp);
1c79356b A	140	(void) thread_funnel_set(network_flock, funnel_state);
	141	}
	142
	143	SYSCTL_DECL(_net_link);
	144	SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW, 0, "Ethernet");
	145
	146	int
	147	ether_resolvemulti(ifp, llsa, sa)
	148	struct ifnet *ifp;
	149	struct sockaddr **llsa;
	150	struct sockaddr *sa;
	151	{
	152	struct sockaddr_dl *sdl;
	153	struct sockaddr_in *sin;
	154	u_char *e_addr;
	155	#if INET6
	156	struct sockaddr_in6 *sin6;
	157	#endif
	158
	159
	160	switch(sa->sa_family) {
	161	case AF_UNSPEC:
	162	/* AppleTalk uses AF_UNSPEC for multicast registration.
	163	* No mapping needed. Just check that it's a valid MC address.
	164	*/
	165	e_addr = &sa->sa_data[0];
	166	if ((e_addr[0] & 1) != 1)
	167	return EADDRNOTAVAIL;
	168	*llsa = 0;
	169	return 0;
	170
	171	case AF_LINK:
	172	/*
	173	* No mapping needed. Just check that it's a valid MC address.
	174	*/
	175	sdl = (struct sockaddr_dl *)sa;
	176	e_addr = LLADDR(sdl);
	177	if ((e_addr[0] & 1) != 1)
	178	return EADDRNOTAVAIL;
	179	*llsa = 0;
	180	return 0;
	181
	182	#if INET
	183	case AF_INET:
	184	sin = (struct sockaddr_in *)sa;
	185	if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
	186	return EADDRNOTAVAIL;
	187	MALLOC(sdl, struct sockaddr_dl , sizeof sdl, M_IFMADDR,
	188	M_WAITOK);
	189	sdl->sdl_len = sizeof *sdl;
	190	sdl->sdl_family = AF_LINK;
	191	sdl->sdl_index = ifp->if_index;
	192	sdl->sdl_type = IFT_ETHER;
	193	sdl->sdl_nlen = 0;
	194	sdl->sdl_alen = ETHER_ADDR_LEN;
	195	sdl->sdl_slen = 0;
	196	e_addr = LLADDR(sdl);
	197	ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr);
	198	llsa = (struct sockaddr )sdl;
	199	return 0;
	200	#endif
	201	#if INET6
	202	case AF_INET6:
	203	sin6 = (struct sockaddr_in6 *)sa;
204	if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
205	/*
206	* An IP6 address of 0 means listen to all
207	* of the Ethernet multicast address used for IP6.
208	* (This is used for multicast routers.)
209	*/
210	ifp->if_flags \|= IFF_ALLMULTI;
211	*llsa = 0;
212	return 0;
213	}
214	MALLOC(sdl, struct sockaddr_dl , sizeof sdl, M_IFMADDR,
215	M_WAITOK);
216	sdl->sdl_len = sizeof *sdl;
217	sdl->sdl_family = AF_LINK;
218	sdl->sdl_index = ifp->if_index;
219	sdl->sdl_type = IFT_ETHER;
220	sdl->sdl_nlen = 0;
221	sdl->sdl_alen = ETHER_ADDR_LEN;
222	sdl->sdl_slen = 0;
223	e_addr = LLADDR(sdl);
224	ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr);
225	kprintf("ether_resolvemulti Adding %x:%x:%x:%x:%x:%x\n",
226	e_addr[0], e_addr[1], e_addr[2], e_addr[3], e_addr[4], e_addr[5]);
227	llsa = (struct sockaddr )sdl;
228	return 0;
229	#endif
230
231	default:
232	/*
233	* Well, the text isn't quite right, but it's the name
234	* that counts...
235	*/
236	return EAFNOSUPPORT;
237	}
238	}
239
240
241
242
243
244	u_char ether_ipmulticast_min[6] = { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 };
245	u_char ether_ipmulticast_max[6] = { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff };
246	/*
247	* Add an Ethernet multicast address or range of addresses to the list for a
248	* given interface.
249	*/
250	int
251	ether_addmulti(ifr, ac)
252	struct ifreq *ifr;
253	register struct arpcom *ac;
254	{
255	register struct ether_multi *enm;
256	struct sockaddr_in *sin;
257	u_char addrlo[6];
258	u_char addrhi[6];
259	int s = splimp();
260
261	switch (ifr->ifr_addr.sa_family) {
262
263	case AF_UNSPEC:
264	bcopy(ifr->ifr_addr.sa_data, addrlo, 6);
265	bcopy(addrlo, addrhi, 6);
266	break;
267
268	#if INET
269	case AF_INET:
270	sin = (struct sockaddr_in *)&(ifr->ifr_addr);
271	if (sin->sin_addr.s_addr == INADDR_ANY) {
272	/*
273	* An IP address of INADDR_ANY means listen to all
274	* of the Ethernet multicast addresses used for IP.
275	* (This is for the sake of IP multicast routers.)
276	*/
277	bcopy(ether_ipmulticast_min, addrlo, 6);
278	bcopy(ether_ipmulticast_max, addrhi, 6);
279	}
280	else {
281	ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo);
282	bcopy(addrlo, addrhi, 6);
283	}
284	break;
285	#endif
286
287	default:
288	splx(s);
289	return (EAFNOSUPPORT);
290	}
291
292	/*
293	* Verify that we have valid Ethernet multicast addresses.
294	*/
295	if ((addrlo[0] & 0x01) != 1 \|\| (addrhi[0] & 0x01) != 1) {
296	splx(s);
297	return (EINVAL);
298	}
299	/*
300	* See if the address range is already in the list.
301	*/
302	ETHER_LOOKUP_MULTI(addrlo, addrhi, ac, enm);
303	if (enm != NULL) {
304	/*
305	* Found it; just increment the reference count.
306	*/
307	++enm->enm_refcount;
308	splx(s);
309	return (0);
310	}
311	/*
312	* New address or range; malloc a new multicast record
313	* and link it into the interface's multicast list.
314	*/
315	enm = (struct ether_multi )_MALLOC(sizeof(enm), M_IFMADDR, M_WAITOK);
316	if (enm == NULL) {
317	splx(s);
318	return (ENOBUFS);
319	}
320	bcopy(addrlo, enm->enm_addrlo, 6);
321	bcopy(addrhi, enm->enm_addrhi, 6);
322	enm->enm_ac = ac;
323	enm->enm_refcount = 1;
324	enm->enm_next = ac->ac_multiaddrs;
325	ac->ac_multiaddrs = enm;
326	splx(s);
327	/*
328	* Return ENETRESET to inform the driver that the list has changed
329	* and its reception filter should be adjusted accordingly.
330	*/
331	return (ENETRESET);
332	}
333
334	/*
335	* Delete a multicast address record.
336	*/
337	int
338	ether_delmulti(ifr, ac, ret_mca)
339	struct ifreq *ifr;
340	register struct arpcom *ac;
341	struct ether_addr * ret_mca;
342	{
343	register struct ether_multi *enm;
344	register struct ether_multi **p;
345	struct sockaddr_in *sin;
346	u_char addrlo[6];
347	u_char addrhi[6];
348	int s = splimp();
349
350	switch (ifr->ifr_addr.sa_family) {
351
352	case AF_UNSPEC:
353	bcopy(ifr->ifr_addr.sa_data, addrlo, 6);
354	bcopy(addrlo, addrhi, 6);
355	break;
356
357	#if INET
358	case AF_INET:
359	sin = (struct sockaddr_in *)&(ifr->ifr_addr);
360	if (sin->sin_addr.s_addr == INADDR_ANY) {
361	/*
362	* An IP address of INADDR_ANY means stop listening
363	* to the range of Ethernet multicast addresses used
364	* for IP.
365	*/
366	bcopy(ether_ipmulticast_min, addrlo, 6);
367	bcopy(ether_ipmulticast_max, addrhi, 6);
368	}
369	else {
370	ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo);
371	bcopy(addrlo, addrhi, 6);
372	}
373	break;
374	#endif
375
376	default:
377	splx(s);
378	return (EAFNOSUPPORT);
379	}
380
381	/*
382	* Look up the address in our list.
383	*/
384	ETHER_LOOKUP_MULTI(addrlo, addrhi, ac, enm);
385	if (enm == NULL) {
386	splx(s);
387	return (ENXIO);
388	}
389	if (--enm->enm_refcount != 0) {
390	/*
391	* Still some claims to this record.
392	*/
393	splx(s);
394	return (0);
395	}
396
397	/* save the low and high address of the range before deletion */
398	if (ret_mca) {
399	ret_mca = ((struct ether_addr *)addrlo);
400	(ret_mca + 1) = ((struct ether_addr *)addrhi);
401	}
402
403	/*
404	* No remaining claims to this record; unlink and free it.
405	*/
406	for (p = &enm->enm_ac->ac_multiaddrs;
407	*p != enm;
408	p = &(*p)->enm_next)
409	continue;
410	p = (p)->enm_next;
411	FREE(enm, M_IFMADDR);
412	splx(s);
413	/*
414	* Return ENETRESET to inform the driver that the list has changed
415	* and its reception filter should be adjusted accordingly.
416	*/
417	return (ENETRESET);
418	}
419
420	/*
421	* Convert Ethernet address to printable (loggable) representation.
422	*/
423	static u_char digits[] = "0123456789abcdef";
424	char *
425	ether_sprintf(p, ap)
426	register u_char *p;
427	register u_char *ap;
428	{ register char *cp;
429	register i;
430
431	for (cp = p, i = 0; i < 6; i++) {
432	cp++ = digits[ap >> 4];
433	cp++ = digits[ap++ & 0xf];
434	*cp++ = ':';
435	}
436	*--cp = 0;
437	return (p);
438	}