286 lines
8.5 KiB
C
286 lines
8.5 KiB
C
/*
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* Copyright (c) 2000-2013 Apple Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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/*
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* Copyright (c) 1982, 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <sys/sockio.h>
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#include <sys/sysctl.h>
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#include <sys/socketvar.h>
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#include <net/dlil.h>
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#include <net/if.h>
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#include <net/route.h>
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#include <net/if_llc.h>
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#include <net/if_dl.h>
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#include <net/if_types.h>
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#include <net/ndrv.h>
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#include <net/kpi_protocol.h>
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#include <net/dlil.h>
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#include <netinet/in.h>
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#include <netinet/in_var.h>
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#include <netinet/if_ether.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#include <netinet6/nd6.h>
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#include <netinet6/in6_ifattach.h>
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#include <netinet6/ip6_var.h>
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/* #include "vlan.h" */
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#if NVLAN > 0
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#include <net/if_vlan_var.h>
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#endif /* NVLAN > 0 */
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#include <net/ether_if_module.h>
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#include <net/sockaddr_utils.h>
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static const u_char etherip6allnodes[ETHER_ADDR_LEN] =
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{ 0x33, 0x33, 0, 0, 0, 1 };
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/*
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* Process a received Ethernet packet;
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* the packet is in the mbuf chain m without
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* the ether header, which is provided separately.
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*/
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static errno_t
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ether_inet6_input(ifnet_t ifp, protocol_family_t protocol,
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mbuf_t packet, char *header)
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{
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#pragma unused(ifp, protocol)
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struct ether_header *eh = (struct ether_header *)(void *)header;
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u_int16_t ether_type;
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bcopy(&eh->ether_type, ðer_type, sizeof(ether_type));
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if (ether_type == htons(ETHERTYPE_IPV6)) {
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struct ifnet *mifp;
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/*
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* Trust the ifp in the mbuf, rather than ifproto's
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* since the packet could have been injected via
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* a dlil_input_packet_list() using an ifp that is
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* different than the one where the packet really
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* came from.
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*/
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mifp = mbuf_pkthdr_rcvif(packet);
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/* Update L2 reachability record, if present (and not bcast) */
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if (bcmp(eh->ether_shost, etherbroadcastaddr,
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ETHER_ADDR_LEN) != 0) {
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nd6_llreach_set_reachable(mifp, eh->ether_shost,
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ETHER_ADDR_LEN);
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}
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/* Save the Ethernet source address for all-nodes multicasts */
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if (!bcmp(eh->ether_dhost, etherip6allnodes, ETHER_ADDR_LEN)) {
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struct ip6aux *ip6a;
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ip6a = ip6_addaux(packet);
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if (ip6a) {
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ip6a->ip6a_flags |= IP6A_HASEEN;
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bcopy(eh->ether_shost, ip6a->ip6a_ehsrc,
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ETHER_ADDR_LEN);
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}
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}
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if (proto_input(protocol, packet) != 0) {
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m_freem(packet);
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}
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} else {
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m_freem(packet);
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}
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return EJUSTRETURN;
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}
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static errno_t
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ether_inet6_pre_output(ifnet_t ifp, protocol_family_t protocol_family,
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mbuf_t *m0, const struct sockaddr *dst_netaddr, void *route,
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char *type, char *edst)
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{
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#pragma unused(protocol_family)
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errno_t result;
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struct sockaddr_dl sdl = {};
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struct mbuf *m = *m0;
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/*
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* Tell ether_frameout it's ok to loop packet if necessary
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*/
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m->m_flags |= M_LOOP;
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result = nd6_lookup_ipv6(ifp, SIN6(dst_netaddr), &sdl, sizeof(sdl), route, *m0);
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if (result == 0) {
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u_int16_t ethertype_ipv6 = htons(ETHERTYPE_IPV6);
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bcopy(ðertype_ipv6, type, sizeof(ethertype_ipv6));
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bcopy(LLADDR(&sdl), edst, sdl.sdl_alen);
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}
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return result;
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}
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static int
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ether_inet6_resolve_multi(ifnet_t ifp, const struct sockaddr *proto_addr,
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struct sockaddr_dl *out_ll, size_t ll_len)
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{
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static const size_t minsize =
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offsetof(struct sockaddr_dl, sdl_data[0]) + ETHER_ADDR_LEN;
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const struct sockaddr_in6 *sin6 =
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SIN6(proto_addr);
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if (proto_addr->sa_family != AF_INET6) {
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return EAFNOSUPPORT;
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}
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if (proto_addr->sa_len < sizeof(struct sockaddr_in6)) {
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return EINVAL;
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}
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if (ll_len < minsize) {
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return EMSGSIZE;
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}
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SOCKADDR_ZERO(out_ll, minsize);
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out_ll->sdl_len = minsize;
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out_ll->sdl_family = AF_LINK;
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out_ll->sdl_index = ifp->if_index;
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out_ll->sdl_type = IFT_ETHER;
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out_ll->sdl_nlen = 0;
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out_ll->sdl_alen = ETHER_ADDR_LEN;
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out_ll->sdl_slen = 0;
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ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, LLADDR(out_ll));
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return 0;
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}
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static errno_t
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ether_inet6_prmod_ioctl(ifnet_t ifp, protocol_family_t protocol_family,
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u_long command, void *data)
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{
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#pragma unused(protocol_family)
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int error = 0;
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switch (command) {
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case SIOCSIFADDR: /* struct ifaddr pointer */
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/*
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* Note: caller of ifnet_ioctl() passes in pointer to
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* struct ifaddr as parameter to SIOCSIFADDR, for legacy
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* reasons.
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*/
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if ((ifp->if_flags & IFF_RUNNING) == 0) {
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ifnet_set_flags(ifp, IFF_UP, IFF_UP);
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ifnet_ioctl(ifp, 0, SIOCSIFFLAGS, NULL);
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}
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break;
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case SIOCGIFADDR: { /* struct ifreq */
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struct ifreq *ifr = (struct ifreq *)(void *)data;
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(void) ifnet_guarded_lladdr_copy_bytes(ifp,
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ifr->ifr_addr.sa_data, ETHER_ADDR_LEN);
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break;
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}
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default:
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error = EOPNOTSUPP;
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break;
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}
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return error;
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}
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errno_t
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ether_attach_inet6(struct ifnet *ifp, protocol_family_t protocol_family)
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{
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#pragma unused(protocol_family)
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struct ifnet_attach_proto_param proto;
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struct ifnet_demux_desc demux[1];
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u_short en_6native = htons(ETHERTYPE_IPV6);
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errno_t error;
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bzero(&proto, sizeof(proto));
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demux[0].type = DLIL_DESC_ETYPE2;
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demux[0].data = &en_6native;
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demux[0].datalen = sizeof(en_6native);
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proto.demux_list = demux;
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proto.demux_count = 1;
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proto.input = ether_inet6_input;
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proto.pre_output = ether_inet6_pre_output;
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proto.ioctl = ether_inet6_prmod_ioctl;
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proto.resolve = ether_inet6_resolve_multi;
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error = ifnet_attach_protocol(ifp, protocol_family, &proto);
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if (error && error != EEXIST) {
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printf("WARNING: %s can't attach ipv6 to %s\n", __func__,
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if_name(ifp));
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}
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return error;
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}
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void
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ether_detach_inet6(struct ifnet *ifp, protocol_family_t protocol_family)
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{
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(void) ifnet_detach_protocol(ifp, protocol_family);
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}
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