[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>
#include <net/ndrv.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>
79	#include <net/ndrv.h>
80
81	#if INET
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	#endif
88
89	#if IPX
90	#include <netipx/ipx.h>
91	#include <netipx/ipx_if.h>
92	#endif
93
94	#if NS
95	#include <netns/ns.h>
96	#include <netns/ns_if.h>
97	ushort ns_nettype;
98	int ether_outputdebug = 0;
99	int ether_inputdebug = 0;
100	#endif
101
102	#if ISO
103	#include <netiso/argo_debug.h>
104	#include <netiso/iso.h>
105	#include <netiso/iso_var.h>
106	#include <netiso/iso_snpac.h>
107	#endif
108
109	/*#if LLC
110	#include <netccitt/dll.h>
111	#include <netccitt/llc_var.h>
112	#endif*/
113
114	#include <sys/socketvar.h>
115
116	#if LLC && CCITT
117	extern struct ifqueue pkintrq;
118	#endif
119
120	#if BRIDGE
121	#include <net/bridge.h>
122	#endif
123
124	/* #include "vlan.h" */
125	#if NVLAN > 0
126	#include <net/if_vlan_var.h>
127	#endif /* NVLAN > 0 */
128
129	static int ether_resolvemulti __P((struct ifnet , struct sockaddr *,
130	struct sockaddr *));
131	extern u_char etherbroadcastaddr[];
132	#define senderr(e) do { error = (e); goto bad;} while (0)
133	#define IFP2AC(IFP) ((struct arpcom *)IFP)
134
135	/*
136	* Perform common duties while attaching to interface list
137	*/
138
139
140	void
141	ether_ifattach(ifp)
142	register struct ifnet *ifp;
143	{
144	register struct ifaddr *ifa;
145	register struct sockaddr_dl *sdl;
146	boolean_t funnel_state;
147
148	funnel_state = thread_funnel_set(network_flock, TRUE);
149	printf("ether_ifattach called for %s\n", ifp->if_name);
150	ether_family_init();
151
152	ifp->if_name = "en";
153	ifp->if_family = APPLE_IF_FAM_ETHERNET;
154	ifp->if_type = IFT_ETHER;
155	ifp->if_addrlen = 6;
156	ifp->if_hdrlen = 14;
157	ifp->if_mtu = ETHERMTU;
158	ifp->if_resolvemulti = ether_resolvemulti;
159	if (ifp->if_baudrate == 0)
160	ifp->if_baudrate = 10000000;
161
162	dlil_if_attach(ifp);
163	ifa = ifnet_addrs[ifp->if_index - 1];
164	if (ifa == 0) {
165	printf("ether_ifattach: no lladdr!\n");
166	(void) thread_funnel_set(network_flock, funnel_state);
167	return;
168	}
169	sdl = (struct sockaddr_dl *)ifa->ifa_addr;
170	sdl->sdl_type = IFT_ETHER;
171	sdl->sdl_alen = ifp->if_addrlen;
172	bcopy((IFP2AC(ifp))->ac_enaddr, LLADDR(sdl), ifp->if_addrlen);
173	#ifdef INET6
174	in6_ifattach_getifid(ifp);
175	#endif
176	(void) thread_funnel_set(network_flock, funnel_state);
177	}
178
179	SYSCTL_DECL(_net_link);
180	SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW, 0, "Ethernet");
181
182	int
183	ether_resolvemulti(ifp, llsa, sa)
184	struct ifnet *ifp;
185	struct sockaddr **llsa;
186	struct sockaddr *sa;
187	{
188	struct sockaddr_dl *sdl;
189	struct sockaddr_in *sin;
190	u_char *e_addr;
191	#if INET6
192	struct sockaddr_in6 *sin6;
193	#endif
194
195
196	switch(sa->sa_family) {
197	case AF_UNSPEC:
198	/* AppleTalk uses AF_UNSPEC for multicast registration.
199	* No mapping needed. Just check that it's a valid MC address.
200	*/
201	e_addr = &sa->sa_data[0];
202	if ((e_addr[0] & 1) != 1)
203	return EADDRNOTAVAIL;
204	*llsa = 0;
205	return 0;
206
207	case AF_LINK:
208	/*
209	* No mapping needed. Just check that it's a valid MC address.
210	*/
211	sdl = (struct sockaddr_dl *)sa;
212	e_addr = LLADDR(sdl);
213	if ((e_addr[0] & 1) != 1)
214	return EADDRNOTAVAIL;
215	*llsa = 0;
216	return 0;
217
218	#if INET
219	case AF_INET:
220	sin = (struct sockaddr_in *)sa;
221	if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
222	return EADDRNOTAVAIL;
223	MALLOC(sdl, struct sockaddr_dl , sizeof sdl, M_IFMADDR,
224	M_WAITOK);
225	sdl->sdl_len = sizeof *sdl;
226	sdl->sdl_family = AF_LINK;
227	sdl->sdl_index = ifp->if_index;
228	sdl->sdl_type = IFT_ETHER;
229	sdl->sdl_nlen = 0;
230	sdl->sdl_alen = ETHER_ADDR_LEN;
231	sdl->sdl_slen = 0;
232	e_addr = LLADDR(sdl);
233	ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr);
234	llsa = (struct sockaddr )sdl;
235	return 0;
236	#endif
237	#if INET6
238	case AF_INET6:
239	sin6 = (struct sockaddr_in6 *)sa;
240	if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
241	/*
242	* An IP6 address of 0 means listen to all
243	* of the Ethernet multicast address used for IP6.
244	* (This is used for multicast routers.)
245	*/
246	ifp->if_flags \|= IFF_ALLMULTI;
247	*llsa = 0;
248	return 0;
249	}
250	MALLOC(sdl, struct sockaddr_dl , sizeof sdl, M_IFMADDR,
251	M_WAITOK);
252	sdl->sdl_len = sizeof *sdl;
253	sdl->sdl_family = AF_LINK;
254	sdl->sdl_index = ifp->if_index;
255	sdl->sdl_type = IFT_ETHER;
256	sdl->sdl_nlen = 0;
257	sdl->sdl_alen = ETHER_ADDR_LEN;
258	sdl->sdl_slen = 0;
259	e_addr = LLADDR(sdl);
260	ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr);
261	kprintf("ether_resolvemulti Adding %x:%x:%x:%x:%x:%x\n",
262	e_addr[0], e_addr[1], e_addr[2], e_addr[3], e_addr[4], e_addr[5]);
263	llsa = (struct sockaddr )sdl;
264	return 0;
265	#endif
266
267	default:
268	/*
269	* Well, the text isn't quite right, but it's the name
270	* that counts...
271	*/
272	return EAFNOSUPPORT;
273	}
274	}
275
276
277
278
279
280	u_char ether_ipmulticast_min[6] = { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 };
281	u_char ether_ipmulticast_max[6] = { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff };
282	/*
283	* Add an Ethernet multicast address or range of addresses to the list for a
284	* given interface.
285	*/
286	int
287	ether_addmulti(ifr, ac)
288	struct ifreq *ifr;
289	register struct arpcom *ac;
290	{
291	register struct ether_multi *enm;
292	struct sockaddr_in *sin;
293	u_char addrlo[6];
294	u_char addrhi[6];
295	int s = splimp();
296
297	switch (ifr->ifr_addr.sa_family) {
298
299	case AF_UNSPEC:
300	bcopy(ifr->ifr_addr.sa_data, addrlo, 6);
301	bcopy(addrlo, addrhi, 6);
302	break;
303
304	#if INET
305	case AF_INET:
306	sin = (struct sockaddr_in *)&(ifr->ifr_addr);
307	if (sin->sin_addr.s_addr == INADDR_ANY) {
308	/*
309	* An IP address of INADDR_ANY means listen to all
310	* of the Ethernet multicast addresses used for IP.
311	* (This is for the sake of IP multicast routers.)
312	*/
313	bcopy(ether_ipmulticast_min, addrlo, 6);
314	bcopy(ether_ipmulticast_max, addrhi, 6);
315	}
316	else {
317	ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo);
318	bcopy(addrlo, addrhi, 6);
319	}
320	break;
321	#endif
322
323	default:
324	splx(s);
325	return (EAFNOSUPPORT);
326	}
327
328	/*
329	* Verify that we have valid Ethernet multicast addresses.
330	*/
331	if ((addrlo[0] & 0x01) != 1 \|\| (addrhi[0] & 0x01) != 1) {
332	splx(s);
333	return (EINVAL);
334	}
335	/*
336	* See if the address range is already in the list.
337	*/
338	ETHER_LOOKUP_MULTI(addrlo, addrhi, ac, enm);
339	if (enm != NULL) {
340	/*
341	* Found it; just increment the reference count.
342	*/
343	++enm->enm_refcount;
344	splx(s);
345	return (0);
346	}
347	/*
348	* New address or range; malloc a new multicast record
349	* and link it into the interface's multicast list.
350	*/
351	enm = (struct ether_multi )_MALLOC(sizeof(enm), M_IFMADDR, M_WAITOK);
352	if (enm == NULL) {
353	splx(s);
354	return (ENOBUFS);
355	}
356	bcopy(addrlo, enm->enm_addrlo, 6);
357	bcopy(addrhi, enm->enm_addrhi, 6);
358	enm->enm_ac = ac;
359	enm->enm_refcount = 1;
360	enm->enm_next = ac->ac_multiaddrs;
361	ac->ac_multiaddrs = enm;
362	splx(s);
363	/*
364	* Return ENETRESET to inform the driver that the list has changed
365	* and its reception filter should be adjusted accordingly.
366	*/
367	return (ENETRESET);
368	}
369
370	/*
371	* Delete a multicast address record.
372	*/
373	int
374	ether_delmulti(ifr, ac, ret_mca)
375	struct ifreq *ifr;
376	register struct arpcom *ac;
377	struct ether_addr * ret_mca;
378	{
379	register struct ether_multi *enm;
380	register struct ether_multi **p;
381	struct sockaddr_in *sin;
382	u_char addrlo[6];
383	u_char addrhi[6];
384	int s = splimp();
385
386	switch (ifr->ifr_addr.sa_family) {
387
388	case AF_UNSPEC:
389	bcopy(ifr->ifr_addr.sa_data, addrlo, 6);
390	bcopy(addrlo, addrhi, 6);
391	break;
392
393	#if INET
394	case AF_INET:
395	sin = (struct sockaddr_in *)&(ifr->ifr_addr);
396	if (sin->sin_addr.s_addr == INADDR_ANY) {
397	/*
398	* An IP address of INADDR_ANY means stop listening
399	* to the range of Ethernet multicast addresses used
400	* for IP.
401	*/
402	bcopy(ether_ipmulticast_min, addrlo, 6);
403	bcopy(ether_ipmulticast_max, addrhi, 6);
404	}
405	else {
406	ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo);
407	bcopy(addrlo, addrhi, 6);
408	}
409	break;
410	#endif
411
412	default:
413	splx(s);
414	return (EAFNOSUPPORT);
415	}
416
417	/*
418	* Look up the address in our list.
419	*/
420	ETHER_LOOKUP_MULTI(addrlo, addrhi, ac, enm);
421	if (enm == NULL) {
422	splx(s);
423	return (ENXIO);
424	}
425	if (--enm->enm_refcount != 0) {
426	/*
427	* Still some claims to this record.
428	*/
429	splx(s);
430	return (0);
431	}
432
433	/* save the low and high address of the range before deletion */
434	if (ret_mca) {
435	ret_mca = ((struct ether_addr *)addrlo);
436	(ret_mca + 1) = ((struct ether_addr *)addrhi);
437	}
438
439	/*
440	* No remaining claims to this record; unlink and free it.
441	*/
442	for (p = &enm->enm_ac->ac_multiaddrs;
443	*p != enm;
444	p = &(*p)->enm_next)
445	continue;
446	p = (p)->enm_next;
447	FREE(enm, M_IFMADDR);
448	splx(s);
449	/*
450	* Return ENETRESET to inform the driver that the list has changed
451	* and its reception filter should be adjusted accordingly.
452	*/
453	return (ENETRESET);
454	}
455
456	/*
457	* Convert Ethernet address to printable (loggable) representation.
458	*/
459	static u_char digits[] = "0123456789abcdef";
460	char *
461	ether_sprintf(p, ap)
462	register u_char *p;
463	register u_char *ap;
464	{ register char *cp;
465	register i;
466
467	for (cp = p, i = 0; i < 6; i++) {
468	cp++ = digits[ap >> 4];
469	cp++ = digits[ap++ & 0xf];
470	*cp++ = ':';
471	}
472	*--cp = 0;
473	return (p);
474	}