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

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This 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 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
 */

#if NOTFB31
#include "opt_atalk.h"
#include "opt_inet.h"
#include "opt_ipx.h"
#include "opt_bdg.h"
#endif

#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
#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

#if NS
#include <netns/ns.h>
#include <netns/ns_if.h>
ushort ns_nettype;
int ether_outputdebug = 0;
int ether_inputdebug = 0;
#endif

#if ISO
#include <netiso/argo_debug.h>
#include <netiso/iso.h>
#include <netiso/iso_var.h>
#include <netiso/iso_snpac.h>
#endif

/*#if LLC
#include <netccitt/dll.h>
#include <netccitt/llc_var.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
 */


void
ether_ifattach(ifp)
	register struct ifnet *ifp;
{
	register struct ifaddr *ifa;
	register struct sockaddr_dl *sdl;
	boolean_t funnel_state;

	funnel_state = thread_funnel_set(network_flock, TRUE);
	printf("ether_ifattach called for %s\n", ifp->if_name);
	ether_family_init();

	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);
	ifa = ifnet_addrs[ifp->if_index - 1];
	if (ifa == 0) {
		printf("ether_ifattach: no lladdr!\n");
		(void) thread_funnel_set(network_flock, funnel_state);
		return;
	}
	sdl = (struct sockaddr_dl *)ifa->ifa_addr;
	sdl->sdl_type = IFT_ETHER;
	sdl->sdl_alen = ifp->if_addrlen;
	bcopy((IFP2AC(ifp))->ac_enaddr, LLADDR(sdl), ifp->if_addrlen);
#ifdef INET6 
        in6_ifattach_getifid(ifp);
#endif      
	(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	*
	6	* The contents of this file constitute Original Code as defined in and
	7	* are subject to the Apple Public Source License Version 1.1 (the
	8	* "License"). You may not use this file except in compliance with the
	9	* License. Please obtain a copy of the License at
	10	* http://www.apple.com/publicsource and read it before using this file.
	11	*
	12	* This Original Code and all software distributed under the License are
	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	16	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	17	* License for the specific language governing rights and limitations
	18	* under the License.
	19	*
	20	* @APPLE_LICENSE_HEADER_END@
	21	*/
	22	/*
	23	* Copyright (c) 1982, 1989, 1993
	24	* The Regents of the University of California. All rights reserved.
	25	*
	26	* Redistribution and use in source and binary forms, with or without
	27	* modification, are permitted provided that the following conditions
	28	* are met:
	29	* 1. Redistributions of source code must retain the above copyright
	30	* notice, this list of conditions and the following disclaimer.
	31	* 2. Redistributions in binary form must reproduce the above copyright
	32	* notice, this list of conditions and the following disclaimer in the
	33	* documentation and/or other materials provided with the distribution.
	34	* 3. All advertising materials mentioning features or use of this software
	35	* must display the following acknowledgement:
	36	* This product includes software developed by the University of
	37	* California, Berkeley and its contributors.
	38	* 4. Neither the name of the University nor the names of its contributors
	39	* may be used to endorse or promote products derived from this software
	40	* without specific prior written permission.
	41	*
	42	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	43	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	44	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	45	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	46	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	47	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	48	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	49	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	50	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	51	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	52	* SUCH DAMAGE.
	53	*
	54	* @(#)if_ethersubr.c 8.1 (Berkeley) 6/10/93
	55	*/
	56
	57	#if NOTFB31
	58	#include "opt_atalk.h"
	59	#include "opt_inet.h"
	60	#include "opt_ipx.h"
	61	#include "opt_bdg.h"
	62	#endif
	63
	64	#include <sys/param.h>
65	#include <sys/systm.h>
66	#include <sys/kernel.h>
67	#include <sys/malloc.h>
68	#include <sys/mbuf.h>
69	#include <sys/socket.h>
70	#include <sys/sockio.h>
71	#include <sys/sysctl.h>
72
73	#include <net/if.h>
74	#include <net/netisr.h>
75	#include <net/route.h>
76	#include <net/if_llc.h>
77	#include <net/if_dl.h>
78	#include <net/if_types.h>
1c79356b A	79
	80	#if INET
	81	#include <netinet/in.h>
	82	#include <netinet/in_var.h>
	83	#include <netinet/if_ether.h>
	84	#include <netinet/in_systm.h>
	85	#include <netinet/ip.h>
	86	#endif
	87
	88	#if IPX
	89	#include <netipx/ipx.h>
	90	#include <netipx/ipx_if.h>
	91	#endif
	92
	93	#if NS
	94	#include <netns/ns.h>
	95	#include <netns/ns_if.h>
	96	ushort ns_nettype;
	97	int ether_outputdebug = 0;
	98	int ether_inputdebug = 0;
	99	#endif
	100
	101	#if ISO
	102	#include <netiso/argo_debug.h>
	103	#include <netiso/iso.h>
	104	#include <netiso/iso_var.h>
	105	#include <netiso/iso_snpac.h>
	106	#endif
	107
	108	/*#if LLC
	109	#include <netccitt/dll.h>
	110	#include <netccitt/llc_var.h>
	111	#endif*/
	112
	113	#include <sys/socketvar.h>
	114
	115	#if LLC && CCITT
	116	extern struct ifqueue pkintrq;
	117	#endif
	118
	119	#if BRIDGE
	120	#include <net/bridge.h>
	121	#endif
	122
	123	/* #include "vlan.h" */
	124	#if NVLAN > 0
	125	#include <net/if_vlan_var.h>
	126	#endif /* NVLAN > 0 */
	127
	128	static int ether_resolvemulti __P((struct ifnet , struct sockaddr *,
	129	struct sockaddr *));
	130	extern u_char etherbroadcastaddr[];
	131	#define senderr(e) do { error = (e); goto bad;} while (0)
	132	#define IFP2AC(IFP) ((struct arpcom *)IFP)
	133
	134	/*
	135	* Perform common duties while attaching to interface list
	136	*/
	137
	138
	139	void
	140	ether_ifattach(ifp)
	141	register struct ifnet *ifp;
	142	{
143	register struct ifaddr *ifa;
144	register struct sockaddr_dl *sdl;
145	boolean_t funnel_state;
146
147	funnel_state = thread_funnel_set(network_flock, TRUE);
148	printf("ether_ifattach called for %s\n", ifp->if_name);
149	ether_family_init();
150
151	ifp->if_name = "en";
152	ifp->if_family = APPLE_IF_FAM_ETHERNET;
153	ifp->if_type = IFT_ETHER;
154	ifp->if_addrlen = 6;
155	ifp->if_hdrlen = 14;
156	ifp->if_mtu = ETHERMTU;
157	ifp->if_resolvemulti = ether_resolvemulti;
158	if (ifp->if_baudrate == 0)
159	ifp->if_baudrate = 10000000;
160
161	dlil_if_attach(ifp);
162	ifa = ifnet_addrs[ifp->if_index - 1];
163	if (ifa == 0) {
164	printf("ether_ifattach: no lladdr!\n");
165	(void) thread_funnel_set(network_flock, funnel_state);
166	return;
167	}
168	sdl = (struct sockaddr_dl *)ifa->ifa_addr;
169	sdl->sdl_type = IFT_ETHER;
170	sdl->sdl_alen = ifp->if_addrlen;
171	bcopy((IFP2AC(ifp))->ac_enaddr, LLADDR(sdl), ifp->if_addrlen);
172	#ifdef INET6
173	in6_ifattach_getifid(ifp);
174	#endif
175	(void) thread_funnel_set(network_flock, funnel_state);
176	}
177
178	SYSCTL_DECL(_net_link);
179	SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW, 0, "Ethernet");
180
181	int
182	ether_resolvemulti(ifp, llsa, sa)
183	struct ifnet *ifp;
184	struct sockaddr **llsa;
185	struct sockaddr *sa;
186	{
187	struct sockaddr_dl *sdl;
188	struct sockaddr_in *sin;
189	u_char *e_addr;
190	#if INET6
191	struct sockaddr_in6 *sin6;
192	#endif
193
194
195	switch(sa->sa_family) {
196	case AF_UNSPEC:
197	/* AppleTalk uses AF_UNSPEC for multicast registration.
198	* No mapping needed. Just check that it's a valid MC address.
199	*/
200	e_addr = &sa->sa_data[0];
201	if ((e_addr[0] & 1) != 1)
202	return EADDRNOTAVAIL;
203	*llsa = 0;
204	return 0;
205
206	case AF_LINK:
207	/*
208	* No mapping needed. Just check that it's a valid MC address.
209	*/
210	sdl = (struct sockaddr_dl *)sa;
211	e_addr = LLADDR(sdl);
212	if ((e_addr[0] & 1) != 1)
213	return EADDRNOTAVAIL;
214	*llsa = 0;
215	return 0;
216
217	#if INET
218	case AF_INET:
219	sin = (struct sockaddr_in *)sa;
220	if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
221	return EADDRNOTAVAIL;
222	MALLOC(sdl, struct sockaddr_dl , sizeof sdl, M_IFMADDR,
223	M_WAITOK);
224	sdl->sdl_len = sizeof *sdl;
225	sdl->sdl_family = AF_LINK;
226	sdl->sdl_index = ifp->if_index;
227	sdl->sdl_type = IFT_ETHER;
228	sdl->sdl_nlen = 0;
229	sdl->sdl_alen = ETHER_ADDR_LEN;
230	sdl->sdl_slen = 0;
231	e_addr = LLADDR(sdl);
232	ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr);
233	llsa = (struct sockaddr )sdl;
234	return 0;
235	#endif
236	#if INET6
237	case AF_INET6:
238	sin6 = (struct sockaddr_in6 *)sa;
239	if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
240	/*
241	* An IP6 address of 0 means listen to all
242	* of the Ethernet multicast address used for IP6.
243	* (This is used for multicast routers.)
244	*/
245	ifp->if_flags \|= IFF_ALLMULTI;
246	*llsa = 0;
247	return 0;
248	}
249	MALLOC(sdl, struct sockaddr_dl , sizeof sdl, M_IFMADDR,
250	M_WAITOK);
251	sdl->sdl_len = sizeof *sdl;
252	sdl->sdl_family = AF_LINK;
253	sdl->sdl_index = ifp->if_index;
254	sdl->sdl_type = IFT_ETHER;
255	sdl->sdl_nlen = 0;
256	sdl->sdl_alen = ETHER_ADDR_LEN;
257	sdl->sdl_slen = 0;
258	e_addr = LLADDR(sdl);
259	ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr);
260	kprintf("ether_resolvemulti Adding %x:%x:%x:%x:%x:%x\n",
261	e_addr[0], e_addr[1], e_addr[2], e_addr[3], e_addr[4], e_addr[5]);
262	llsa = (struct sockaddr )sdl;
263	return 0;
264	#endif
265
266	default:
267	/*
268	* Well, the text isn't quite right, but it's the name
269	* that counts...
270	*/
271	return EAFNOSUPPORT;
272	}
273	}
274
275
276
277
278
279	u_char ether_ipmulticast_min[6] = { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 };
280	u_char ether_ipmulticast_max[6] = { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff };
281	/*
282	* Add an Ethernet multicast address or range of addresses to the list for a
283	* given interface.
284	*/
285	int
286	ether_addmulti(ifr, ac)
287	struct ifreq *ifr;
288	register struct arpcom *ac;
289	{
290	register struct ether_multi *enm;
291	struct sockaddr_in *sin;
292	u_char addrlo[6];
293	u_char addrhi[6];
294	int s = splimp();
295
296	switch (ifr->ifr_addr.sa_family) {
297
298	case AF_UNSPEC:
299	bcopy(ifr->ifr_addr.sa_data, addrlo, 6);
300	bcopy(addrlo, addrhi, 6);
301	break;
302
303	#if INET
304	case AF_INET:
305	sin = (struct sockaddr_in *)&(ifr->ifr_addr);
306	if (sin->sin_addr.s_addr == INADDR_ANY) {
307	/*
308	* An IP address of INADDR_ANY means listen to all
309	* of the Ethernet multicast addresses used for IP.
310	* (This is for the sake of IP multicast routers.)
311	*/
312	bcopy(ether_ipmulticast_min, addrlo, 6);
313	bcopy(ether_ipmulticast_max, addrhi, 6);
314	}
315	else {
316	ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo);
317	bcopy(addrlo, addrhi, 6);
318	}
319	break;
320	#endif
321
322	default:
323	splx(s);
324	return (EAFNOSUPPORT);
325	}
326
327	/*
328	* Verify that we have valid Ethernet multicast addresses.
329	*/
330	if ((addrlo[0] & 0x01) != 1 \|\| (addrhi[0] & 0x01) != 1) {
331	splx(s);
332	return (EINVAL);
333	}
334	/*
335	* See if the address range is already in the list.
336	*/
337	ETHER_LOOKUP_MULTI(addrlo, addrhi, ac, enm);
338	if (enm != NULL) {
339	/*
340	* Found it; just increment the reference count.
341	*/
342	++enm->enm_refcount;
343	splx(s);
344	return (0);
345	}
346	/*
347	* New address or range; malloc a new multicast record
348	* and link it into the interface's multicast list.
349	*/
350	enm = (struct ether_multi )_MALLOC(sizeof(enm), M_IFMADDR, M_WAITOK);
351	if (enm == NULL) {
352	splx(s);
353	return (ENOBUFS);
354	}
355	bcopy(addrlo, enm->enm_addrlo, 6);
356	bcopy(addrhi, enm->enm_addrhi, 6);
357	enm->enm_ac = ac;
358	enm->enm_refcount = 1;
359	enm->enm_next = ac->ac_multiaddrs;
360	ac->ac_multiaddrs = enm;
361	splx(s);
362	/*
363	* Return ENETRESET to inform the driver that the list has changed
364	* and its reception filter should be adjusted accordingly.
365	*/
366	return (ENETRESET);
367	}
368
369	/*
370	* Delete a multicast address record.
371	*/
372	int
373	ether_delmulti(ifr, ac, ret_mca)
374	struct ifreq *ifr;
375	register struct arpcom *ac;
376	struct ether_addr * ret_mca;
377	{
378	register struct ether_multi *enm;
379	register struct ether_multi **p;
380	struct sockaddr_in *sin;
381	u_char addrlo[6];
382	u_char addrhi[6];
383	int s = splimp();
384
385	switch (ifr->ifr_addr.sa_family) {
386
387	case AF_UNSPEC:
388	bcopy(ifr->ifr_addr.sa_data, addrlo, 6);
389	bcopy(addrlo, addrhi, 6);
390	break;
391
392	#if INET
393	case AF_INET:
394	sin = (struct sockaddr_in *)&(ifr->ifr_addr);
395	if (sin->sin_addr.s_addr == INADDR_ANY) {
396	/*
397	* An IP address of INADDR_ANY means stop listening
398	* to the range of Ethernet multicast addresses used
399	* for IP.
400	*/
401	bcopy(ether_ipmulticast_min, addrlo, 6);
402	bcopy(ether_ipmulticast_max, addrhi, 6);
403	}
404	else {
405	ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo);
406	bcopy(addrlo, addrhi, 6);
407	}
408	break;
409	#endif
410
411	default:
412	splx(s);
413	return (EAFNOSUPPORT);
414	}
415
416	/*
417	* Look up the address in our list.
418	*/
419	ETHER_LOOKUP_MULTI(addrlo, addrhi, ac, enm);
420	if (enm == NULL) {
421	splx(s);
422	return (ENXIO);
423	}
424	if (--enm->enm_refcount != 0) {
425	/*
426	* Still some claims to this record.
427	*/
428	splx(s);
429	return (0);
430	}
431
432	/* save the low and high address of the range before deletion */
433	if (ret_mca) {
434	ret_mca = ((struct ether_addr *)addrlo);
435	(ret_mca + 1) = ((struct ether_addr *)addrhi);
436	}
437
438	/*
439	* No remaining claims to this record; unlink and free it.
440	*/
441	for (p = &enm->enm_ac->ac_multiaddrs;
442	*p != enm;
443	p = &(*p)->enm_next)
444	continue;
445	p = (p)->enm_next;
446	FREE(enm, M_IFMADDR);
447	splx(s);
448	/*
449	* Return ENETRESET to inform the driver that the list has changed
450	* and its reception filter should be adjusted accordingly.
451	*/
452	return (ENETRESET);
453	}
454
455	/*
456	* Convert Ethernet address to printable (loggable) representation.
457	*/
458	static u_char digits[] = "0123456789abcdef";
459	char *
460	ether_sprintf(p, ap)
461	register u_char *p;
462	register u_char *ap;
463	{ register char *cp;
464	register i;
465
466	for (cp = p, i = 0; i < 6; i++) {
467	cp++ = digits[ap >> 4];
468	cp++ = digits[ap++ & 0xf];
469	*cp++ = ':';
470	}
471	*--cp = 0;
472	return (p);
473	}