bsd/net/ndrv.h

   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 /* Copyright (c) 1997, 1998 Apple Computer, Inc. All Rights Reserved */
  23 /*
  24  *      @(#)ndrv.h      1.1 (MacOSX) 6/10/43
  25  * Justin Walker - 970604
  26  */
  27 #include <net/dlil.h>
  28
  29 #ifndef _NET_NDRV_H
  30 #define _NET_NDRV_H
  31 #include <sys/appleapiopts.h>
  32
  33
  34 struct sockaddr_ndrv
  35 {
  36     unsigned char snd_len;
  37         unsigned char snd_family;
  38         unsigned char snd_name[IFNAMSIZ]; /* from if.h */
  39 };
  40
  41 /*
  42  * Support for user-mode protocol handlers
  43  */
  44
  45 #define NDRV_DEMUXTYPE_ETHERTYPE        4
  46 #define NDRV_DEMUXTYPE_SAP                      5
  47 #define NDRV_DEMUXTYPE_SNAP                     6
  48
  49 #define NDRVPROTO_NDRV                          0
  50
  51 /*
  52  * Struct: ndrv_demux_desc
  53  * Purpose:
  54  *   To uniquely identify a packet based on its low-level framing information.
  55  *
  56  * Fields:
  57  *              type            :       type of protocol in data field, must be understood by
  58  *                                              the interface family of the interface the socket is bound to
  59  *              length          :       length of protocol data in "data" field
  60  *              data            :       union of framing-specific data, in network byte order
  61  *              ether_type      :       ethernet type in network byte order, assuming
  62  *                                              ethernet type II framing
  63  *              sap                     :       first 3 bytes of sap header, network byte order
  64  *              snap            :       first 5 bytes of snap header, network byte order
  65  *              other           :       up to 28 bytes of protocol data for different protocol type
  66  *
  67  * Examples:
  68  * 1) 802.1x uses ether_type 0x888e, so the descriptor would be set as:
  69  *    struct ndrv_demux_desc desc;
  70  *    desc.type = NDRV_DEMUXTYPE_ETHERTYPE
  71  *        desc.length = sizeof(unsigned short);
  72  *    desc.ether_type = htons(0x888e);
  73  * 2) AppleTalk uses SNAP 0x080007809B
  74  *    struct ndrv_demux_desc desc;
  75  *    desc.type = NDRV_DEMUXTYPE_SNAP;
  76  *    desc.length = 5;
  77  *    desc.data.snap[0] = 08;
  78  *    desc.data.snap[1] = 00;
  79  *    desc.data.snap[2] = 07;
  80  *    desc.data.snap[3] = 80;
  81  *    desc.data.snap[4] = 9B;
  82  */
  83 struct ndrv_demux_desc
  84 {
  85     u_int16_t   type;
  86     u_int16_t   length;
  87     union
  88     {
  89         u_int16_t       ether_type;
  90         u_int8_t        sap[3];
  91         u_int8_t        snap[5];
  92         u_int8_t        other[28];
  93     } data;
  94 };
  95
  96 #define NDRV_PROTOCOL_DESC_VERS 1
  97
  98 /*
  99  * Struct: ndrv_protocol_desc
 100  * Purpose:
 101  *   Used to "bind" an NDRV socket so that packets that match
 102  *   given protocol demux descriptions can be received:
 103  * Field:
 104  *              version                 :       must be NDRV_PROTOCOL_DESC_VERS
 105  *              protocol_family :       unique identifier for this protocol
 106  *              demux_count             :       number of demux_list descriptors in demux_list
 107  *              demux_list              :       pointer to array of demux descriptors
 108  */
 109 struct ndrv_protocol_desc
 110 {
 111     u_int32_t                           version;
 112     u_int32_t                           protocol_family;
 113     u_int32_t                           demux_count;
 114     struct ndrv_demux_desc*     demux_list;
 115 };
 116
 117 #define SOL_NDRVPROTO           NDRVPROTO_NDRV  /* Use this socket level */
 118 #define NDRV_DELDMXSPEC         0x02                    /* Delete the registered protocol */
 119 #define NDRV_SETDMXSPEC         0x04                    /* Set the protocol spec */
 120 #define NDRV_ADDMULTICAST       0x05                    /* Add a physical multicast address */
 121 #define NDRV_DELMULTICAST       0x06                    /* Delete a phyiscal multicast */
 122
 123 /*
 124  * SOL_NDRVPROTO - use this for the socket level when calling setsocketopt
 125  * NDRV_DELDMXSPEC - removes the registered protocol and all related demuxes
 126  * NDRV_SETDMXSPEC - set the protocol to receive, use struct ndrv_protocol_desc
 127  *                                       as the parameter.
 128  * NDRV_ADDMULTICAST - Enable reception of a phyiscal multicast address, use
 129  *                     a sockaddr of the appropriate type for the media in use.
 130  * NDRV_DELMULTICAST - Disable reception of a phyiscal multicast address, use
 131  *                                         a sockaddr of the appropriate type for the media in use.
 132  *
 133  * When adding multicasts, the multicasts are ref counted. If the multicast is
 134  * already registered in the kernel, the count will be bumped. When deleting
 135  * the multicast, the count is decremented. If the count reaches zero the
 136  * multicast is removed. If your process is killed, PF_NDRV will unregister
 137  * the mulitcasts you've added. You can only delete multicasts you've added
 138  * on the same socket.
 139  *
 140  * If the interface goes away while your socket is open, your protocol is
 141  * immediately detached and sending/receiving is disabled on the socket.
 142  * If you need a chance to do something, please file a bug and we can give
 143  * you a second or two.
 144  */
 145
 146 #endif  /* _NET_NDRV_H */