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  * 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.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  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.
  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  */
  55
  56
  57
  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 #include <kern/lock.h>
  67
  68 #include <net/if.h>
  69 #include <net/route.h>
  70 #include <net/if_llc.h>
  71 #include <net/if_dl.h>
  72 #include <net/if_types.h>
  73 #include <net/ndrv.h>
  74 #include <net/kpi_protocol.h>
  75
  76 #include <netinet/in.h>
  77 #include <netinet/in_var.h>
  78 #include <netinet/if_ether.h>
  79 #include <netinet/in_systm.h>
  80 #include <netinet/ip.h>
  81
  82 #if INET6
  83 #include <netinet6/nd6.h>
  84 #include <netinet6/in6_ifattach.h>
  85 #endif
  86
  87
  88
  89 #include <sys/socketvar.h>
  90
  91 #include <net/dlil.h>
  92
  93
  94 #if LLC && CCITT
  95 extern struct ifqueue pkintrq;
  96 #endif
  97
  98
  99 #if BRIDGE
 100 #include <net/bridge.h>
 101 #endif
 102
 103 /* #include "vlan.h" */
 104 #if NVLAN > 0
 105 #include <net/if_vlan_var.h>
 106 #endif /* NVLAN > 0 */
 107
 108 /* Local function declerations */
 109 int ether_attach_inet6(struct ifnet *ifp, u_long protocol_family);
 110 int ether_detach_inet6(struct ifnet *ifp, u_long protocol_family);
 111
 112 /*
 113  * Process a received Ethernet packet;
 114  * the packet is in the mbuf chain m without
 115  * the ether header, which is provided separately.
 116  */
 117 static errno_t
 118 inet6_ether_input(
 119         __unused ifnet_t        ifp,
 120         protocol_family_t       protocol,
 121         mbuf_t                          packet,
 122         __unused char           *header)
 123 {
 124         proto_input(protocol, packet);
 125         return 0;
 126 }
 127
 128 static errno_t
 129 inet6_ether_pre_output(
 130     ifnet_t                                     ifp,
 131     __unused protocol_family_t  protocol_family,
 132     mbuf_t                                      *m0,
 133     const struct sockaddr               *dst_netaddr,
 134     void                                                *route,
 135     char                                                *type,
 136     char                                                *edst)
 137 {
 138         errno_t result;
 139         struct  sockaddr_dl     sdl;
 140         register struct mbuf *m = *m0;
 141
 142         /*
 143          * Tell ether_frameout it's ok to loop packet if necessary
 144          */
 145         m->m_flags |= M_LOOP;
 146
 147         result = nd6_lookup_ipv6(ifp, (const struct sockaddr_in6*)dst_netaddr,
 148                                                          &sdl, sizeof(sdl), route, *m0);
 149
 150         if (result == 0) {
 151                 *(u_int16_t*)type = htons(ETHERTYPE_IPV6);
 152                 bcopy(LLADDR(&sdl), edst, sdl.sdl_alen);
 153         }
 154
 155
 156
 157     return result;
 158 }
 159
 160 static int
 161 ether_inet6_resolve_multi(
 162         ifnet_t ifp,
 163         const struct sockaddr *proto_addr,
 164         struct sockaddr_dl *out_ll,
 165         size_t  ll_len)
 166 {
 167         static const size_t minsize = offsetof(struct sockaddr_dl, sdl_data[0]) + ETHER_ADDR_LEN;
 168         const struct sockaddr_in6       *sin6 = (const struct sockaddr_in6*)proto_addr;
 169
 170         if (proto_addr->sa_family != AF_INET6)
 171                 return EAFNOSUPPORT;
 172
 173         if (proto_addr->sa_len < sizeof(struct sockaddr_in6))
 174                 return EINVAL;
 175
 176         if (ll_len < minsize)
 177                 return EMSGSIZE;
 178
 179         bzero(out_ll, minsize);
 180         out_ll->sdl_len = minsize;
 181         out_ll->sdl_family = AF_LINK;
 182         out_ll->sdl_index = ifp->if_index;
 183         out_ll->sdl_type = IFT_ETHER;
 184         out_ll->sdl_nlen = 0;
 185         out_ll->sdl_alen = ETHER_ADDR_LEN;
 186         out_ll->sdl_slen = 0;
 187         ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, LLADDR(out_ll));
 188
 189         return 0;
 190 }
 191
 192
 193 static errno_t
 194 ether_inet6_prmod_ioctl(
 195         ifnet_t                                         ifp,
 196         __unused protocol_family_t      protocol_family,
 197         u_int32_t                                       command,
 198         void*                                           data)
 199 {
 200     struct ifreq *ifr = (struct ifreq *) data;
 201     int error = 0;
 202
 203     switch (command) {
 204     case SIOCSIFADDR:
 205          if ((ifp->if_flags & IFF_RUNNING) == 0) {
 206               ifnet_set_flags(ifp, IFF_UP, IFF_UP);
 207               dlil_ioctl(0, ifp, SIOCSIFFLAGS, (caddr_t) 0);
 208          }
 209
 210         break;
 211
 212     case SIOCGIFADDR:
 213         ifnet_lladdr_copy_bytes(ifp, ifr->ifr_addr.sa_data, ETHER_ADDR_LEN);
 214     break;
 215
 216     case SIOCSIFMTU:
 217         /*
 218          * IOKit IONetworkFamily will set the right MTU according to the driver
 219          */
 220
 221          return (0);
 222
 223     default:
 224          return EOPNOTSUPP;
 225     }
 226
 227     return (error);
 228 }
 229
 230 int
 231 ether_attach_inet6(
 232         struct ifnet    *ifp,
 233         __unused u_long protocol_family)
 234 {
 235         struct ifnet_attach_proto_param proto;
 236         struct ifnet_demux_desc demux[1];
 237         u_short en_6native=htons(ETHERTYPE_IPV6);
 238         errno_t error;
 239
 240         bzero(&proto, sizeof(proto));
 241         demux[0].type = DLIL_DESC_ETYPE2;
 242         demux[0].data = &en_6native;
 243         demux[0].datalen = sizeof(en_6native);
 244         proto.demux_list = demux;
 245         proto.demux_count = 1;
 246         proto.input = inet6_ether_input;
 247         proto.pre_output = inet6_ether_pre_output;
 248         proto.ioctl = ether_inet6_prmod_ioctl;
 249         proto.resolve = ether_inet6_resolve_multi;
 250         error = ifnet_attach_protocol(ifp, protocol_family, &proto);
 251         if (error && error != EEXIST) {
 252                 printf("WARNING: ether_attach_inet6 can't attach ipv6 to %s%d\n",
 253                         ifp->if_name, ifp->if_unit);
 254         }
 255
 256         return error;
 257 }
 258
 259 int
 260 ether_detach_inet6(
 261         struct ifnet    *ifp,
 262         u_long                  protocol_family)
 263 {
 264     errno_t         error;
 265
 266         error = ifnet_detach_protocol(ifp, protocol_family);
 267         if (error && error != ENOENT) {
 268                 printf("WARNING: ether_detach_inet6 can't detach ipv6 from %s%d\n",
 269                         ifp->if_name, ifp->if_unit);
 270         }
 271
 272     return error;
 273 }
 274