[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
 * $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);
                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;
	}
}


/*
 * 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	*
e5568f75 A	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.
1c79356b	11	*
e5568f75 A	12	* This Original Code and all software distributed under the License are
e5568f75 A	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
1c79356b A	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
1c79356b A	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
e5568f75 A	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.
1c79356b A	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
9bccf70c	55	* $FreeBSD: src/sys/net/if_ethersubr.c,v 1.70.2.17 2001/08/01 00:47:49 fenner Exp $
1c79356b A	56	*/
1c79356b A	57
1c79356b A	58	#include <sys/param.h>
	59	#include <sys/systm.h>
	60	#include <sys/kernel.h>
	61	#include <sys/malloc.h>
	62	#include <sys/mbuf.h>
	63	#include <sys/socket.h>
	64	#include <sys/sockio.h>
	65	#include <sys/sysctl.h>
	66
	67	#include <net/if.h>
1c79356b A	68	#include <net/route.h>
	69	#include <net/if_llc.h>
	70	#include <net/if_dl.h>
	71	#include <net/if_types.h>
1c79356b	72
9bccf70c	73	#if INET \|\| INET6
1c79356b A	74	#include <netinet/in.h>
	75	#include <netinet/in_var.h>
	76	#include <netinet/if_ether.h>
	77	#include <netinet/in_systm.h>
	78	#include <netinet/ip.h>
	79	#endif
	80
	81	#if IPX
	82	#include <netipx/ipx.h>
	83	#include <netipx/ipx_if.h>
	84	#endif
	85
1c79356b A	86	#include <sys/socketvar.h>
	87
	88	#if LLC && CCITT
	89	extern struct ifqueue pkintrq;
	90	#endif
	91
	92	#if BRIDGE
	93	#include <net/bridge.h>
	94	#endif
	95
	96	/* #include "vlan.h" */
	97	#if NVLAN > 0
	98	#include <net/if_vlan_var.h>
	99	#endif /* NVLAN > 0 */
	100
1c79356b A	101	extern u_char etherbroadcastaddr[];
1c79356b A	102	#define senderr(e) do { error = (e); goto bad;} while (0)
1c79356b A	103
	104	/*
	105	* Perform common duties while attaching to interface list
	106	*/
	107
1c79356b	108	int
91447636 A	109	ether_resolvemulti(
	110	struct ifnet *ifp,
	111	struct sockaddr **llsa,
	112	struct sockaddr *sa)
1c79356b A	113	{
	114	struct sockaddr_dl *sdl;
	115	struct sockaddr_in *sin;
	116	u_char *e_addr;
	117	#if INET6
	118	struct sockaddr_in6 *sin6;
	119	#endif
	120
	121
	122	switch(sa->sa_family) {
	123	case AF_UNSPEC:
	124	/* AppleTalk uses AF_UNSPEC for multicast registration.
	125	* No mapping needed. Just check that it's a valid MC address.
	126	*/
	127	e_addr = &sa->sa_data[0];
	128	if ((e_addr[0] & 1) != 1)
	129	return EADDRNOTAVAIL;
	130	*llsa = 0;
	131	return 0;
	132
	133	case AF_LINK:
	134	/*
	135	* No mapping needed. Just check that it's a valid MC address.
	136	*/
	137	sdl = (struct sockaddr_dl *)sa;
	138	e_addr = LLADDR(sdl);
	139	if ((e_addr[0] & 1) != 1)
	140	return EADDRNOTAVAIL;
	141	*llsa = 0;
	142	return 0;
	143
	144	#if INET
	145	case AF_INET:
	146	sin = (struct sockaddr_in *)sa;
	147	if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
	148	return EADDRNOTAVAIL;
	149	MALLOC(sdl, struct sockaddr_dl , sizeof sdl, M_IFMADDR,
	150	M_WAITOK);
	151	sdl->sdl_len = sizeof *sdl;
	152	sdl->sdl_family = AF_LINK;
	153	sdl->sdl_index = ifp->if_index;
	154	sdl->sdl_type = IFT_ETHER;
	155	sdl->sdl_nlen = 0;
	156	sdl->sdl_alen = ETHER_ADDR_LEN;
	157	sdl->sdl_slen = 0;
	158	e_addr = LLADDR(sdl);
	159	ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr);
	160	llsa = (struct sockaddr )sdl;
	161	return 0;
	162	#endif
	163	#if INET6
	164	case AF_INET6:
	165	sin6 = (struct sockaddr_in6 *)sa;
	166	if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
	167	/*
	168	* An IP6 address of 0 means listen to all
	169	* of the Ethernet multicast address used for IP6.
	170	* (This is used for multicast routers.)
	171	*/
	172	ifp->if_flags \|= IFF_ALLMULTI;
	173	*llsa = 0;
	174	return 0;
	175	}
	176	MALLOC(sdl, struct sockaddr_dl , sizeof sdl, M_IFMADDR,
177	M_WAITOK);
178	sdl->sdl_len = sizeof *sdl;
179	sdl->sdl_family = AF_LINK;
180	sdl->sdl_index = ifp->if_index;
181	sdl->sdl_type = IFT_ETHER;
182	sdl->sdl_nlen = 0;
183	sdl->sdl_alen = ETHER_ADDR_LEN;
184	sdl->sdl_slen = 0;
185	e_addr = LLADDR(sdl);
186	ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr);
187	kprintf("ether_resolvemulti Adding %x:%x:%x:%x:%x:%x\n",
188	e_addr[0], e_addr[1], e_addr[2], e_addr[3], e_addr[4], e_addr[5]);
189	llsa = (struct sockaddr )sdl;
190	return 0;
191	#endif
192
193	default:
194	/*
195	* Well, the text isn't quite right, but it's the name
196	* that counts...
197	*/
198	return EAFNOSUPPORT;
199	}
200	}
201
202
1c79356b A	203	/*
	204	* Convert Ethernet address to printable (loggable) representation.
	205	*/
	206	static u_char digits[] = "0123456789abcdef";
	207	char *
	208	ether_sprintf(p, ap)
	209	register u_char *p;
	210	register u_char *ap;
	211	{ register char *cp;
	212	register i;
	213
	214	for (cp = p, i = 0; i < 6; i++) {
	215	cp++ = digits[ap >> 4];
	216	cp++ = digits[ap++ & 0xf];
	217	*cp++ = ':';
	218	}
	219	*--cp = 0;
	220	return (p);
	221	}