1/*
2 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
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.
14 *
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
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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 *	@(#)if_ethersubr.c	8.1 (Berkeley) 6/10/93
61 * $FreeBSD: src/sys/net/if_ethersubr.c,v 1.70.2.17 2001/08/01 00:47:49 fenner Exp $
62 */
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/route.h>
75#include <net/if_llc.h>
76#include <net/if_dl.h>
77#include <net/if_types.h>
78
79#if INET || INET6
80#include <netinet/in.h>
81#include <netinet/in_var.h>
82#include <netinet/if_ether.h>
83#include <netinet/in_systm.h>
84#include <netinet/ip.h>
85#endif
86
87#if IPX
88#include <netipx/ipx.h>
89#include <netipx/ipx_if.h>
90#endif
91
92#include <sys/socketvar.h>
93
94#if LLC && CCITT
95extern struct ifqueue pkintrq;
96#endif
97
98#if BRIDGE
99#include <net/bridge.h>
100#endif
101
102/* #include "vlan.h" */
103#if NVLAN > 0
104#include <net/if_vlan_var.h>
105#endif /* NVLAN > 0 */
106
107extern u_char	etherbroadcastaddr[];
108#define senderr(e) do { error = (e); goto bad;} while (0)
109
110/*
111 * Perform common duties while attaching to interface list
112 */
113
114int
115ether_resolvemulti(
116	struct ifnet *ifp,
117	struct sockaddr **llsa,
118	struct sockaddr *sa)
119{
120	struct sockaddr_dl *sdl;
121	struct sockaddr_in *sin;
122	u_char *e_addr;
123#if INET6
124        struct sockaddr_in6 *sin6;
125#endif
126
127
128	switch(sa->sa_family) {
129	case AF_UNSPEC:
130		/* AppleTalk uses AF_UNSPEC for multicast registration.
131		 * No mapping needed. Just check that it's a valid MC address.
132		 */
133		e_addr = &sa->sa_data[0];
134		if ((e_addr[0] & 1) != 1)
135			return EADDRNOTAVAIL;
136		*llsa = 0;
137		return 0;
138
139	case AF_LINK:
140		/*
141		 * No mapping needed. Just check that it's a valid MC address.
142		 */
143		sdl = (struct sockaddr_dl *)sa;
144		e_addr = LLADDR(sdl);
145		if ((e_addr[0] & 1) != 1)
146			return EADDRNOTAVAIL;
147		*llsa = 0;
148		return 0;
149
150#if INET
151	case AF_INET:
152		sin = (struct sockaddr_in *)sa;
153		if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
154			return EADDRNOTAVAIL;
155		MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR,
156		       M_WAITOK);
157		sdl->sdl_len = sizeof *sdl;
158		sdl->sdl_family = AF_LINK;
159		sdl->sdl_index = ifp->if_index;
160		sdl->sdl_type = IFT_ETHER;
161		sdl->sdl_nlen = 0;
162		sdl->sdl_alen = ETHER_ADDR_LEN;
163		sdl->sdl_slen = 0;
164		e_addr = LLADDR(sdl);
165		ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr);
166		*llsa = (struct sockaddr *)sdl;
167		return 0;
168#endif
169#if INET6
170        case AF_INET6:
171                sin6 = (struct sockaddr_in6 *)sa;
172                if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
173                        /*
174                         * An IP6 address of 0 means listen to all
175                         * of the Ethernet multicast address used for IP6.
176                         * (This is used for multicast routers.)
177                         */
178                        ifp->if_flags |= IFF_ALLMULTI;
179                        *llsa = 0;
180                        return 0;
181                }
182                MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR,
183                       M_WAITOK);
184                sdl->sdl_len = sizeof *sdl;
185                sdl->sdl_family = AF_LINK;
186                sdl->sdl_index = ifp->if_index;
187                sdl->sdl_type = IFT_ETHER;
188                sdl->sdl_nlen = 0;
189                sdl->sdl_alen = ETHER_ADDR_LEN;
190                sdl->sdl_slen = 0;
191                e_addr = LLADDR(sdl);
192                ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr);
193#if 0
194                printf("ether_resolvemulti Adding %x:%x:%x:%x:%x:%x\n",
195                                e_addr[0], e_addr[1], e_addr[2], e_addr[3], e_addr[4], e_addr[5]);
196#endif
197                *llsa = (struct sockaddr *)sdl;
198                return 0;
199#endif
200
201	default:
202		/*
203		 * Well, the text isn't quite right, but it's the name
204		 * that counts...
205		 */
206		return EAFNOSUPPORT;
207	}
208}
209
210
211/*
212 * Convert Ethernet address to printable (loggable) representation.
213 */
214static u_char digits[] = "0123456789abcdef";
215char *
216ether_sprintf(p, ap)
217	register u_char *p;
218        register u_char *ap;
219{	register char *cp;
220        register i;
221
222        for (cp = p, i = 0; i < 6; i++) {
223                *cp++ = digits[*ap >> 4];
224                *cp++ = digits[*ap++ & 0xf];
225                *cp++ = ':';
226        }
227        *--cp = 0;
228        return (p);
229}
230