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

/*
 * Copyright (c) 2000 Apple Computer, 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.
 *
 *	@(#)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/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 */

extern u_char	etherbroadcastaddr[];
#define senderr(e) do { error = (e); goto bad;} while (0)

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

int
ether_resolvemulti(
	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);
#if 0
                printf("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]);
#endif
                *llsa = (struct sockaddr *)sdl;
                return 0;
#endif

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


/*
 * 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	1	/*
5d5c5d0d A	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
5d5c5d0d A	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	* @(#)if_ethersubr.c 8.1 (Berkeley) 6/10/93
9bccf70c	61	* $FreeBSD: src/sys/net/if_ethersubr.c,v 1.70.2.17 2001/08/01 00:47:49 fenner Exp $
1c79356b A	62	*/
1c79356b A	63
1c79356b A	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>
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>
1c79356b	78
9bccf70c	79	#if INET \|\| INET6
1c79356b A	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
1c79356b A	92	#include <sys/socketvar.h>
	93
	94	#if LLC && CCITT
	95	extern 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
1c79356b A	107	extern u_char etherbroadcastaddr[];
1c79356b A	108	#define senderr(e) do { error = (e); goto bad;} while (0)
1c79356b A	109
	110	/*
	111	* Perform common duties while attaching to interface list
	112	*/
	113
1c79356b	114	int
91447636 A	115	ether_resolvemulti(
	116	struct ifnet *ifp,
	117	struct sockaddr **llsa,
	118	struct sockaddr *sa)
1c79356b A	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);
2d21ac55 A	193	#if 0
2d21ac55 A	194	printf("ether_resolvemulti Adding %x:%x:%x:%x:%x:%x\n",
1c79356b	195	e_addr[0], e_addr[1], e_addr[2], e_addr[3], e_addr[4], e_addr[5]);
2d21ac55	196	#endif
1c79356b A	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
1c79356b A	211	/*
	212	* Convert Ethernet address to printable (loggable) representation.
	213	*/
	214	static u_char digits[] = "0123456789abcdef";
	215	char *
	216	ether_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	}