bsd/net/ether_inet6_pr_module.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_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. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /*
  24  * Copyright (c) 1982, 1989, 1993
  25  *      The Regents of the University of California.  All rights reserved.
  26  *
  27  * Redistribution and use in source and binary forms, with or without
  28  * modification, are permitted provided that the following conditions
  29  * are met:
  30  * 1. Redistributions of source code must retain the above copyright
  31  *    notice, this list of conditions and the following disclaimer.
  32  * 2. Redistributions in binary form must reproduce the above copyright
  33  *    notice, this list of conditions and the following disclaimer in the
  34  *    documentation and/or other materials provided with the distribution.
  35  * 3. All advertising materials mentioning features or use of this software
  36  *    must display the following acknowledgement:
  37  *      This product includes software developed by the University of
  38  *      California, Berkeley and its contributors.
  39  * 4. Neither the name of the University nor the names of its contributors
  40  *    may be used to endorse or promote products derived from this software
  41  *    without specific prior written permission.
  42  *
  43  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  44  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  45  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  46  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  47  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  48  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  49  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  50  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  51  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  52  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  53  * SUCH DAMAGE.
  54  *
  55  */
  56
  57
  58
  59 #include <sys/param.h>
  60 #include <sys/systm.h>
  61 #include <sys/kernel.h>
  62 #include <sys/malloc.h>
  63 #include <sys/mbuf.h>
  64 #include <sys/socket.h>
  65 #include <sys/sockio.h>
  66 #include <sys/sysctl.h>
  67 #include <kern/lock.h>
  68
  69 #include <net/if.h>
  70 #include <net/route.h>
  71 #include <net/if_llc.h>
  72 #include <net/if_dl.h>
  73 #include <net/if_types.h>
  74 #include <net/ndrv.h>
  75 #include <net/kpi_protocol.h>
  76
  77 #include <netinet/in.h>
  78 #include <netinet/in_var.h>
  79 #include <netinet/if_ether.h>
  80 #include <netinet/in_systm.h>
  81 #include <netinet/ip.h>
  82
  83 #if INET6
  84 #include <netinet6/nd6.h>
  85 #include <netinet6/in6_ifattach.h>
  86 #endif
  87
  88
  89
  90 #include <sys/socketvar.h>
  91
  92 #include <net/dlil.h>
  93
  94
  95 #if LLC && CCITT
  96 extern struct ifqueue pkintrq;
  97 #endif
  98
  99
 100 #if BRIDGE
 101 #include <net/bridge.h>
 102 #endif
 103
 104 /* #include "vlan.h" */
 105 #if NVLAN > 0
 106 #include <net/if_vlan_var.h>
 107 #endif /* NVLAN > 0 */
 108
 109 /* Local function declerations */
 110 int ether_attach_inet6(struct ifnet *ifp, u_long protocol_family);
 111 int ether_detach_inet6(struct ifnet *ifp, u_long protocol_family);
 112
 113 /*
 114  * Process a received Ethernet packet;
 115  * the packet is in the mbuf chain m without
 116  * the ether header, which is provided separately.
 117  */
 118 static errno_t
 119 inet6_ether_input(
 120         __unused ifnet_t        ifp,
 121         protocol_family_t       protocol,
 122         mbuf_t                          packet,
 123         __unused char           *header)
 124 {
 125         proto_input(protocol, packet);
 126         return 0;
 127 }
 128
 129 static errno_t
 130 inet6_ether_pre_output(
 131     ifnet_t                                     ifp,
 132     __unused protocol_family_t  protocol_family,
 133     mbuf_t                                      *m0,
 134     const struct sockaddr               *dst_netaddr,
 135     void                                                *route,
 136     char                                                *type,
 137     char                                                *edst)
 138 {
 139         errno_t result;
 140         struct  sockaddr_dl     sdl;
 141         register struct mbuf *m = *m0;
 142
 143         /*
 144          * Tell ether_frameout it's ok to loop packet if necessary
 145          */
 146         m->m_flags |= M_LOOP;
 147
 148         result = nd6_lookup_ipv6(ifp, (const struct sockaddr_in6*)dst_netaddr,
 149                                                          &sdl, sizeof(sdl), route, *m0);
 150
 151         if (result == 0) {
 152                 *(u_int16_t*)type = htons(ETHERTYPE_IPV6);
 153                 bcopy(LLADDR(&sdl), edst, sdl.sdl_alen);
 154         }
 155
 156
 157
 158     return result;
 159 }
 160
 161 static int
 162 ether_inet6_resolve_multi(
 163         ifnet_t ifp,
 164         const struct sockaddr *proto_addr,
 165         struct sockaddr_dl *out_ll,
 166         size_t  ll_len)
 167 {
 168         static const size_t minsize = offsetof(struct sockaddr_dl, sdl_data[0]) + ETHER_ADDR_LEN;
 169         const struct sockaddr_in6       *sin6 = (const struct sockaddr_in6*)proto_addr;
 170
 171         if (proto_addr->sa_family != AF_INET6)
 172                 return EAFNOSUPPORT;
 173
 174         if (proto_addr->sa_len < sizeof(struct sockaddr_in6))
 175                 return EINVAL;
 176
 177         if (ll_len < minsize)
 178                 return EMSGSIZE;
 179
 180         bzero(out_ll, minsize);
 181         out_ll->sdl_len = minsize;
 182         out_ll->sdl_family = AF_LINK;
 183         out_ll->sdl_index = ifp->if_index;
 184         out_ll->sdl_type = IFT_ETHER;
 185         out_ll->sdl_nlen = 0;
 186         out_ll->sdl_alen = ETHER_ADDR_LEN;
 187         out_ll->sdl_slen = 0;
 188         ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, LLADDR(out_ll));
 189
 190         return 0;
 191 }
 192
 193
 194 static errno_t
 195 ether_inet6_prmod_ioctl(
 196         ifnet_t                                         ifp,
 197         __unused protocol_family_t      protocol_family,
 198         u_int32_t                                       command,
 199         void*                                           data)
 200 {
 201     struct ifreq *ifr = (struct ifreq *) data;
 202     int error = 0;
 203
 204     switch (command) {
 205     case SIOCSIFADDR:
 206          if ((ifp->if_flags & IFF_RUNNING) == 0) {
 207               ifnet_set_flags(ifp, IFF_UP, IFF_UP);
 208               dlil_ioctl(0, ifp, SIOCSIFFLAGS, (caddr_t) 0);
 209          }
 210
 211         break;
 212
 213     case SIOCGIFADDR:
 214         ifnet_lladdr_copy_bytes(ifp, ifr->ifr_addr.sa_data, ETHER_ADDR_LEN);
 215     break;
 216
 217     case SIOCSIFMTU:
 218         /*
 219          * IOKit IONetworkFamily will set the right MTU according to the driver
 220          */
 221
 222          return (0);
 223
 224     default:
 225          return EOPNOTSUPP;
 226     }
 227
 228     return (error);
 229 }
 230
 231 int
 232 ether_attach_inet6(
 233         struct ifnet    *ifp,
 234         __unused u_long protocol_family)
 235 {
 236         struct ifnet_attach_proto_param proto;
 237         struct ifnet_demux_desc demux[1];
 238         u_short en_6native=htons(ETHERTYPE_IPV6);
 239         errno_t error;
 240
 241         bzero(&proto, sizeof(proto));
 242         demux[0].type = DLIL_DESC_ETYPE2;
 243         demux[0].data = &en_6native;
 244         demux[0].datalen = sizeof(en_6native);
 245         proto.demux_list = demux;
 246         proto.demux_count = 1;
 247         proto.input = inet6_ether_input;
 248         proto.pre_output = inet6_ether_pre_output;
 249         proto.ioctl = ether_inet6_prmod_ioctl;
 250         proto.resolve = ether_inet6_resolve_multi;
 251         error = ifnet_attach_protocol(ifp, protocol_family, &proto);
 252         if (error && error != EEXIST) {
 253                 printf("WARNING: ether_attach_inet6 can't attach ipv6 to %s%d\n",
 254                         ifp->if_name, ifp->if_unit);
 255         }
 256
 257         return error;
 258 }
 259
 260 int
 261 ether_detach_inet6(
 262         struct ifnet    *ifp,
 263         u_long                  protocol_family)
 264 {
 265     errno_t         error;
 266
 267         error = ifnet_detach_protocol(ifp, protocol_family);
 268         if (error && error != ENOENT) {
 269                 printf("WARNING: ether_detach_inet6 can't detach ipv6 from %s%d\n",
 270                         ifp->if_name, ifp->if_unit);
 271         }
 272
 273     return error;
 274 }
 275