bsd/net/ether_at_pr_module.c

   1 /*
   2  * Copyright (c) 2000,2009 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
  73 #include <net/if.h>
  74 #include <net/route.h>
  75 #include <net/if_llc.h>
  76 #include <net/if_dl.h>
  77 #include <net/if_types.h>
  78 #include <netinet/if_ether.h>
  79 #include <net/kpi_interface.h>
  80 #include <net/kpi_protocol.h>
  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
  91 /* #include "vlan.h" */
  92 #if NVLAN > 0
  93 #include <net/if_vlan_var.h>
  94 #endif /* NVLAN > 0 */
  95
  96 #include <net/ether_if_module.h>
  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  */
 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)
 109 {
 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          */
 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);
 121
 122         error = proto_input(PF_APPLETALK, m);
 123
 124         if (error)
 125                 m_freem(m);
 126
 127         return error;
 128 }
 129
 130
 131
 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)
 141 {
 142     struct mbuf *m = *m0;
 143     const struct ether_header *eh;
 144     int hlen;   /* link layer header length */
 145
 146         if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
 147                 return ENETDOWN;
 148
 149         hlen = ETHER_HDR_LEN;
 150
 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;
 163
 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;
 169
 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);
 177 }
 178
 179
 180
 181
 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)
 188 {
 189     struct ifreq *ifr = data;
 190     int error = 0;
 191
 192     switch (command) {
 193
 194     case SIOCSIFADDR:
 195          if ((ifp->if_flags & IFF_RUNNING) == 0) {
 196               ifnet_set_flags(ifp, IFF_UP, IFF_UP);
 197               ifnet_ioctl(ifp, 0, SIOCSIFFLAGS, NULL);
 198          }
 199
 200         break;
 201
 202     case SIOCGIFADDR:
 203         ifnet_lladdr_copy_bytes(ifp, ifr->ifr_addr.sa_data, ETHER_ADDR_LEN);
 204         break;
 205
 206     default:
 207         error = EOPNOTSUPP;
 208         break;
 209     }
 210     return (error);
 211 }
 212
 213
 214
 215 __private_extern__ errno_t
 216 ether_attach_at(
 217         ifnet_t ifp,
 218         __unused protocol_family_t proto_family)
 219 {
 220         struct ifnet_attach_proto_param proto;
 221         struct ifnet_demux_desc demux[2];
 222     u_int8_t    atalk_snap[5] = {0x08, 0x00, 0x07, 0x80, 0x9b};
 223     u_int8_t    aarp_snap[5] = {0x00, 0x00, 0x00, 0x80, 0xf3};
 224         int             error;
 225
 226         bzero(demux, sizeof(demux));
 227         demux[0].type = DLIL_DESC_SNAP;
 228         demux[0].data = atalk_snap;
 229         demux[0].datalen = sizeof(atalk_snap);
 230         demux[1].type = DLIL_DESC_SNAP;
 231         demux[1].data = aarp_snap;
 232         demux[1].datalen = sizeof(aarp_snap);
 233
 234         bzero(&proto, sizeof(proto));
 235         proto.demux_list        = demux;
 236         proto.demux_count       = sizeof(demux) / sizeof(demux[0]);
 237         proto.input                     = ether_at_input;
 238         proto.pre_output        = ether_at_pre_output;
 239         proto.ioctl                     = ether_at_prmod_ioctl;
 240
 241         error = ifnet_attach_protocol(ifp, PF_APPLETALK, &proto);
 242         if (error && error != EEXIST) {
 243                 printf("WARNING: ether_attach_at failed to attach"
 244                        " AppleTalk to %s%d\n", ifp->if_name, ifp->if_unit);
 245         }
 246         return (error);
 247 }
 248
 249 __private_extern__ void
 250 ether_detach_at(
 251         ifnet_t ifp,
 252         __unused protocol_family_t proto_family)
 253 {
 254         (void)ifnet_detach_protocol(ifp, PF_APPLETALK);
 255 }