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

/*
 * Copyright (c) 2000-2011 Apple 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.
 *
 */


#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>
#include <netinet/if_ether.h>
#include <net/kpi_interface.h>
#include <net/kpi_protocol.h>

#include <sys/socketvar.h>

#include <net/dlil.h>
#include <netat/at_pat.h>
#if NETAT
extern struct ifqueue atalkintrq;
#endif


/* #include "vlan.h" */
#if NVLAN > 0
#include <net/if_vlan_var.h>
#endif /* NVLAN > 0 */

#include <net/ether_if_module.h>

/*
 * Process a received Ethernet packet;
 * the packet is in the mbuf chain m without
 * the ether header, which is provided separately.
 */
static errno_t
ether_at_input(
	__unused ifnet_t			ifp,
	__unused protocol_family_t	protocol_family,
	mbuf_t				m,
	__unused char			*frame_header)
{
	errno_t error;
	/*
	 * note: for AppleTalk we need to pass the enet header of the
	 * packet up stack. To do so, we made sure in that the FULL packet
	 * is copied in the mbuf by the driver, and only the m_data and
	 * length have been shifted to make IP and the other guys happy.
	 */

	m->m_data -= sizeof(struct ether_header);
	m->m_len += sizeof(struct ether_header);
	m->m_pkthdr.len += sizeof(struct ether_header);

	error = proto_input(PF_APPLETALK, m);
	
	if (error)
		m_freem(m);

	return error;
}


static errno_t
ether_at_pre_output(
	ifnet_t						ifp,
	__unused protocol_family_t	protocol_family,
	mbuf_t						*m0,
	const struct sockaddr		*dst_netaddr,
	__unused void				*route,
	char						*type,
	char						*edst)
{
    struct mbuf *m = *m0;
    const struct ether_header *eh;
    int hlen;	/* link layer header length */

	if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 
		return ENETDOWN;

	hlen = ETHER_HDR_LEN;

	/*
	 * Tell ether_frameout it's ok to loop packet unless negated below.
	 */
	m->m_flags |= M_LOOP;

	switch (dst_netaddr->sa_family) {
		case AF_UNSPEC:
			m->m_flags &= ~M_LOOP;
			eh = (const struct ether_header *)dst_netaddr->sa_data;
			(void)memcpy(edst, eh->ether_dhost, 6);
			*(u_short *)type = eh->ether_type;
			break;
	
		case AF_APPLETALK:
			eh = (const struct ether_header *)dst_netaddr->sa_data;
			(void)memcpy(edst, eh->ether_dhost, 6);
			*(u_short *)type = htons(m->m_pkthdr.len);
			break;
		
		default:
			printf("%s%d: can't handle af%d\n", ifp->if_name, ifp->if_unit,
				   dst_netaddr->sa_family);
			return EAFNOSUPPORT;
	}
	
	return (0);
}


static errno_t
ether_at_prmod_ioctl(
    ifnet_t						ifp,
    __unused protocol_family_t	protocol_family,
    u_int32_t					command,
    void						*data)
{
    int error = 0;

    switch (command) {

    case SIOCSIFADDR:		/* struct ifaddr pointer */
	/*
	 * Note: caller of ifnet_ioctl() passes in pointer to
	 * struct ifaddr as parameter to SIOCSIFADDR, for legacy
	 * reasons.
	 */
	 if ((ifp->if_flags & IFF_RUNNING) == 0) {
	      ifnet_set_flags(ifp, IFF_UP, IFF_UP);
	      ifnet_ioctl(ifp, 0, SIOCSIFFLAGS, NULL);
	 }

	break;

    case SIOCGIFADDR: {		/* struct ifreq */
	struct ifreq *ifr = data;

	ifnet_lladdr_copy_bytes(ifp, ifr->ifr_addr.sa_data, ETHER_ADDR_LEN);
	break;
    }

    default:
	error = EOPNOTSUPP;
	break;
    }
    return (error);
}


__private_extern__ errno_t
ether_attach_at(
	ifnet_t	ifp,
	__unused protocol_family_t proto_family)
{
	struct ifnet_attach_proto_param proto;
	struct ifnet_demux_desc demux[2];
    u_int8_t	atalk_snap[5] = {0x08, 0x00, 0x07, 0x80, 0x9b};
    u_int8_t	aarp_snap[5] = {0x00, 0x00, 0x00, 0x80, 0xf3};
	int 		error;

	bzero(demux, sizeof(demux));
	demux[0].type = DLIL_DESC_SNAP;
	demux[0].data = atalk_snap;
	demux[0].datalen = sizeof(atalk_snap);
	demux[1].type = DLIL_DESC_SNAP;
	demux[1].data = aarp_snap;
	demux[1].datalen = sizeof(aarp_snap);

	bzero(&proto, sizeof(proto));
	proto.demux_list	= demux;
	proto.demux_count	= sizeof(demux) / sizeof(demux[0]);
	proto.input			= ether_at_input;
	proto.pre_output	= ether_at_pre_output;
	proto.ioctl			= ether_at_prmod_ioctl;
	
	error = ifnet_attach_protocol(ifp, PF_APPLETALK, &proto);
	if (error && error != EEXIST) {
		printf("WARNING: ether_attach_at failed to attach"
		       " AppleTalk to %s%d\n", ifp->if_name, ifp->if_unit);
	}
	return (error);
}

__private_extern__ void
ether_detach_at(
	ifnet_t ifp,
	__unused protocol_family_t proto_family)
{
	(void)ifnet_detach_protocol(ifp, PF_APPLETALK);
}
Commit	Line	Data
1c79356b	1	/*
316670eb	2	* Copyright (c) 2000-2011 Apple Inc. All rights reserved.
5d5c5d0d	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	*/
	61
	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>
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	#include <netinet/if_ether.h>
2d21ac55 A	79	#include <net/kpi_interface.h>
2d21ac55 A	80	#include <net/kpi_protocol.h>
1c79356b A	81
	82	#include <sys/socketvar.h>
	83
	84	#include <net/dlil.h>
	85	#include <netat/at_pat.h>
	86	#if NETAT
	87	extern struct ifqueue atalkintrq;
	88	#endif
	89
	90
1c79356b A	91	/* #include "vlan.h" */
	92	#if NVLAN > 0
	93	#include <net/if_vlan_var.h>
	94	#endif /* NVLAN > 0 */
	95
2d21ac55	96	#include <net/ether_if_module.h>
1c79356b A	97
	98	/*
	99	* Process a received Ethernet packet;
	100	* the packet is in the mbuf chain m without
	101	* the ether header, which is provided separately.
	102	*/
2d21ac55 A	103	static errno_t
	104	ether_at_input(
	105	__unused ifnet_t ifp,
	106	__unused protocol_family_t protocol_family,
	107	mbuf_t m,
	108	__unused char *frame_header)
1c79356b	109	{
2d21ac55 A	110	errno_t error;
	111	/*
	112	* note: for AppleTalk we need to pass the enet header of the
	113	* packet up stack. To do so, we made sure in that the FULL packet
	114	* is copied in the mbuf by the driver, and only the m_data and
	115	* length have been shifted to make IP and the other guys happy.
	116	*/
91447636 A	117
	118	m->m_data -= sizeof(struct ether_header);
	119	m->m_len += sizeof(struct ether_header);
	120	m->m_pkthdr.len += sizeof(struct ether_header);
1c79356b	121
2d21ac55 A	122	error = proto_input(PF_APPLETALK, m);
	123
	124	if (error)
	125	m_freem(m);
	126
	127	return error;
1c79356b A	128	}
	129
	130
	131
2d21ac55 A	132	static errno_t
	133	ether_at_pre_output(
	134	ifnet_t ifp,
	135	__unused protocol_family_t protocol_family,
	136	mbuf_t *m0,
	137	const struct sockaddr *dst_netaddr,
	138	__unused void *route,
	139	char *type,
	140	char *edst)
1c79356b	141	{
2d21ac55 A	142	struct mbuf m = m0;
	143	const struct ether_header *eh;
	144	int hlen; /* link layer header length */
1c79356b	145
2d21ac55 A	146	if ((ifp->if_flags & (IFF_UP\|IFF_RUNNING)) != (IFF_UP\|IFF_RUNNING))
2d21ac55 A	147	return ENETDOWN;
1c79356b	148
2d21ac55	149	hlen = ETHER_HDR_LEN;
1c79356b	150
2d21ac55 A	151	/*
	152	* Tell ether_frameout it's ok to loop packet unless negated below.
	153	*/
	154	m->m_flags \|= M_LOOP;
	155
	156	switch (dst_netaddr->sa_family) {
	157	case AF_UNSPEC:
	158	m->m_flags &= ~M_LOOP;
	159	eh = (const struct ether_header *)dst_netaddr->sa_data;
	160	(void)memcpy(edst, eh->ether_dhost, 6);
	161	(u_short )type = eh->ether_type;
	162	break;
1c79356b	163
2d21ac55 A	164	case AF_APPLETALK:
	165	eh = (const struct ether_header *)dst_netaddr->sa_data;
	166	(void)memcpy(edst, eh->ether_dhost, 6);
	167	(u_short )type = htons(m->m_pkthdr.len);
	168	break;
1c79356b	169
2d21ac55 A	170	default:
	171	printf("%s%d: can't handle af%d\n", ifp->if_name, ifp->if_unit,
	172	dst_netaddr->sa_family);
	173	return EAFNOSUPPORT;
	174	}
	175
	176	return (0);
1c79356b A	177	}
	178
	179
	180
	181
2d21ac55 A	182	static errno_t
	183	ether_at_prmod_ioctl(
	184	ifnet_t ifp,
	185	__unused protocol_family_t protocol_family,
	186	u_int32_t command,
	187	void *data)
1c79356b	188	{
1c79356b	189	int error = 0;
1c79356b A	190
	191	switch (command) {
	192
316670eb A	193	case SIOCSIFADDR: /* struct ifaddr pointer */
	194	/*
	195	* Note: caller of ifnet_ioctl() passes in pointer to
	196	* struct ifaddr as parameter to SIOCSIFADDR, for legacy
	197	* reasons.
	198	*/
1c79356b	199	if ((ifp->if_flags & IFF_RUNNING) == 0) {
91447636	200	ifnet_set_flags(ifp, IFF_UP, IFF_UP);
2d21ac55	201	ifnet_ioctl(ifp, 0, SIOCSIFFLAGS, NULL);
1c79356b A	202	}
	203
	204	break;
	205
316670eb A	206	case SIOCGIFADDR: { /* struct ifreq */
	207	struct ifreq *ifr = data;
	208
91447636	209	ifnet_lladdr_copy_bytes(ifp, ifr->ifr_addr.sa_data, ETHER_ADDR_LEN);
1c79356b	210	break;
316670eb	211	}
1c79356b A	212
1c79356b A	213	default:
2d21ac55 A	214	error = EOPNOTSUPP;
2d21ac55 A	215	break;
1c79356b	216	}
1c79356b A	217	return (error);
	218	}
	219
	220
	221
2d21ac55	222	__private_extern__ errno_t
91447636	223	ether_attach_at(
2d21ac55 A	224	ifnet_t ifp,
2d21ac55 A	225	__unused protocol_family_t proto_family)
1c79356b	226	{
2d21ac55 A	227	struct ifnet_attach_proto_param proto;
2d21ac55 A	228	struct ifnet_demux_desc demux[2];
91447636 A	229	u_int8_t atalk_snap[5] = {0x08, 0x00, 0x07, 0x80, 0x9b};
91447636 A	230	u_int8_t aarp_snap[5] = {0x00, 0x00, 0x00, 0x80, 0xf3};
2d21ac55 A	231	int error;
	232
	233	bzero(demux, sizeof(demux));
	234	demux[0].type = DLIL_DESC_SNAP;
	235	demux[0].data = atalk_snap;
	236	demux[0].datalen = sizeof(atalk_snap);
	237	demux[1].type = DLIL_DESC_SNAP;
	238	demux[1].data = aarp_snap;
	239	demux[1].datalen = sizeof(aarp_snap);
	240
	241	bzero(&proto, sizeof(proto));
	242	proto.demux_list = demux;
	243	proto.demux_count = sizeof(demux) / sizeof(demux[0]);
	244	proto.input = ether_at_input;
	245	proto.pre_output = ether_at_pre_output;
	246	proto.ioctl = ether_at_prmod_ioctl;
91447636	247
2d21ac55 A	248	error = ifnet_attach_protocol(ifp, PF_APPLETALK, &proto);
	249	if (error && error != EEXIST) {
	250	printf("WARNING: ether_attach_at failed to attach"
	251	" AppleTalk to %s%d\n", ifp->if_name, ifp->if_unit);
91447636	252	}
2d21ac55 A	253	return (error);
2d21ac55 A	254	}
1c79356b	255
2d21ac55 A	256	__private_extern__ void
	257	ether_detach_at(
	258	ifnet_t ifp,
	259	__unused protocol_family_t proto_family)
1c79356b	260	{
2d21ac55	261	(void)ifnet_detach_protocol(ifp, PF_APPLETALK);
1c79356b	262	}