bsd/net/ether_inet6_pr_module.c

   1 /*
   2  * Copyright (c) 2000-2007 Apple 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  */
  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 #include <kern/lock.h>
  73
  74 #include <net/if.h>
  75 #include <net/route.h>
  76 #include <net/if_llc.h>
  77 #include <net/if_dl.h>
  78 #include <net/if_types.h>
  79 #include <net/ndrv.h>
  80 #include <net/kpi_protocol.h>
  81
  82 #include <netinet/in.h>
  83 #include <netinet/in_var.h>
  84 #include <netinet/if_ether.h>
  85 #include <netinet/in_systm.h>
  86 #include <netinet/ip.h>
  87
  88 #if INET6
  89 #include <netinet6/nd6.h>
  90 #include <netinet6/in6_ifattach.h>
  91 #endif
  92
  93
  94
  95 #include <sys/socketvar.h>
  96
  97 #include <net/dlil.h>
  98
  99
 100 #if LLC && CCITT
 101 extern struct ifqueue pkintrq;
 102 #endif
 103
 104
 105 #if BRIDGE
 106 #include <net/bridge.h>
 107 #endif
 108
 109 /* #include "vlan.h" */
 110 #if NVLAN > 0
 111 #include <net/if_vlan_var.h>
 112 #endif /* NVLAN > 0 */
 113
 114 #include <net/ether_if_module.h>
 115
 116 /*
 117  * Process a received Ethernet packet;
 118  * the packet is in the mbuf chain m without
 119  * the ether header, which is provided separately.
 120  */
 121 static errno_t
 122 ether_inet6_input(
 123         __unused ifnet_t        ifp,
 124         protocol_family_t       protocol,
 125         mbuf_t                          packet,
 126         __unused char           *header)
 127 {
 128         errno_t error;
 129
 130         if ((error = proto_input(protocol, packet)))
 131                 m_freem(packet);
 132         return error;
 133 }
 134
 135 static errno_t
 136 ether_inet6_pre_output(
 137     ifnet_t                                     ifp,
 138     __unused protocol_family_t  protocol_family,
 139     mbuf_t                                      *m0,
 140     const struct sockaddr               *dst_netaddr,
 141     void                                                *route,
 142     char                                                *type,
 143     char                                                *edst)
 144 {
 145         errno_t result;
 146         struct  sockaddr_dl     sdl;
 147         register struct mbuf *m = *m0;
 148
 149         /*
 150          * Tell ether_frameout it's ok to loop packet if necessary
 151          */
 152         m->m_flags |= M_LOOP;
 153
 154         result = nd6_lookup_ipv6(ifp, (const struct sockaddr_in6*)dst_netaddr,
 155                                                          &sdl, sizeof(sdl), route, *m0);
 156
 157         if (result == 0) {
 158                 *(u_int16_t*)type = htons(ETHERTYPE_IPV6);
 159                 bcopy(LLADDR(&sdl), edst, sdl.sdl_alen);
 160         }
 161
 162
 163
 164     return result;
 165 }
 166
 167 static int
 168 ether_inet6_resolve_multi(
 169         ifnet_t ifp,
 170         const struct sockaddr *proto_addr,
 171         struct sockaddr_dl *out_ll,
 172         size_t  ll_len)
 173 {
 174         static const size_t minsize = offsetof(struct sockaddr_dl, sdl_data[0]) + ETHER_ADDR_LEN;
 175         const struct sockaddr_in6       *sin6 = (const struct sockaddr_in6*)proto_addr;
 176
 177         if (proto_addr->sa_family != AF_INET6)
 178                 return EAFNOSUPPORT;
 179
 180         if (proto_addr->sa_len < sizeof(struct sockaddr_in6))
 181                 return EINVAL;
 182
 183         if (ll_len < minsize)
 184                 return EMSGSIZE;
 185
 186         bzero(out_ll, minsize);
 187         out_ll->sdl_len = minsize;
 188         out_ll->sdl_family = AF_LINK;
 189         out_ll->sdl_index = ifp->if_index;
 190         out_ll->sdl_type = IFT_ETHER;
 191         out_ll->sdl_nlen = 0;
 192         out_ll->sdl_alen = ETHER_ADDR_LEN;
 193         out_ll->sdl_slen = 0;
 194         ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, LLADDR(out_ll));
 195
 196         return 0;
 197 }
 198
 199
 200 static errno_t
 201 ether_inet6_prmod_ioctl(
 202         ifnet_t                                         ifp,
 203         __unused protocol_family_t      protocol_family,
 204         u_int32_t                                       command,
 205         void*                                           data)
 206 {
 207     struct ifreq *ifr = (struct ifreq *) data;
 208     int error = 0;
 209
 210         switch (command) {
 211         case SIOCSIFADDR:
 212                 if ((ifp->if_flags & IFF_RUNNING) == 0) {
 213                         ifnet_set_flags(ifp, IFF_UP, IFF_UP);
 214                         ifnet_ioctl(ifp, 0, SIOCSIFFLAGS, NULL);
 215                 }
 216                 break;
 217
 218         case SIOCGIFADDR:
 219         ifnet_lladdr_copy_bytes(ifp, ifr->ifr_addr.sa_data, ETHER_ADDR_LEN);
 220         break;
 221
 222     default:
 223         error = EOPNOTSUPP;
 224         break;
 225     }
 226     return (error);
 227 }
 228
 229 errno_t
 230 ether_attach_inet6(
 231         struct ifnet    *ifp,
 232         __unused protocol_family_t protocol_family)
 233 {
 234         struct ifnet_attach_proto_param proto;
 235         struct ifnet_demux_desc demux[1];
 236         u_short en_6native=htons(ETHERTYPE_IPV6);
 237         errno_t error;
 238
 239         bzero(&proto, sizeof(proto));
 240         demux[0].type = DLIL_DESC_ETYPE2;
 241         demux[0].data = &en_6native;
 242         demux[0].datalen = sizeof(en_6native);
 243         proto.demux_list = demux;
 244         proto.demux_count = 1;
 245         proto.input = ether_inet6_input;
 246         proto.pre_output = ether_inet6_pre_output;
 247         proto.ioctl = ether_inet6_prmod_ioctl;
 248         proto.resolve = ether_inet6_resolve_multi;
 249         error = ifnet_attach_protocol(ifp, protocol_family, &proto);
 250         if (error && error != EEXIST) {
 251                 printf("WARNING: ether_attach_inet6 can't attach ipv6 to %s%d\n",
 252                         ifp->if_name, ifp->if_unit);
 253         }
 254
 255         return error;
 256 }
 257
 258 void
 259 ether_detach_inet6(
 260         struct ifnet    *ifp,
 261         protocol_family_t protocol_family)
 262 {
 263         errno_t         error;
 264
 265         error = ifnet_detach_protocol(ifp, protocol_family);
 266         if (error && error != ENOENT) {
 267                 printf("WARNING: ether_detach_inet6 can't detach ipv6 from %s%d\n",
 268                         ifp->if_name, ifp->if_unit);
 269         }
 270 }
 271