1 /* 2 * Copyright (c) 2008 Apple Computer, 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 /* Copyright (c) 1997, 1998 Apple Computer, Inc. All Rights Reserved */ 29 /* 30 * @(#)ndrv.h 1.1 (MacOSX) 6/10/43 31 * Justin Walker - 970604 32 */ 33 #include <net/dlil.h> 34 35 #ifndef _NET_NDRV_H 36 #define _NET_NDRV_H 37 #include <net/if_var.h> 38 #include <sys/appleapiopts.h> 39 #include <sys/types.h> 40 41 42 struct sockaddr_ndrv { 43 unsigned char snd_len; 44 unsigned char snd_family; 45 unsigned char snd_name[IFNAMSIZ]; /* from if.h */ 46 }; 47 48 /* 49 * Support for user-mode protocol handlers 50 */ 51 52 #define NDRV_DEMUXTYPE_ETHERTYPE 4 53 #define NDRV_DEMUXTYPE_SAP 5 54 #define NDRV_DEMUXTYPE_SNAP 6 55 56 #define NDRVPROTO_NDRV 0 57 58 /* 59 * Struct: ndrv_demux_desc 60 * Purpose: 61 * To uniquely identify a packet based on its low-level framing information. 62 * 63 * Fields: 64 * type : type of protocol in data field, must be understood by 65 * the interface family of the interface the socket is bound to 66 * length : length of protocol data in "data" field 67 * data : union of framing-specific data, in network byte order 68 * ether_type : ethernet type in network byte order, assuming 69 * ethernet type II framing 70 * sap : first 3 bytes of sap header, network byte order 71 * snap : first 5 bytes of snap header, network byte order 72 * other : up to 28 bytes of protocol data for different protocol type 73 * 74 * Examples: 75 * 1) 802.1x uses ether_type 0x888e, so the descriptor would be set as: 76 * struct ndrv_demux_desc desc; 77 * desc.type = NDRV_DEMUXTYPE_ETHERTYPE 78 * desc.length = sizeof(unsigned short); 79 * desc.ether_type = htons(0x888e); 80 * 2) AppleTalk uses SNAP 0x080007809B 81 * struct ndrv_demux_desc desc; 82 * desc.type = NDRV_DEMUXTYPE_SNAP; 83 * desc.length = 5; 84 * desc.data.snap[0] = 08; 85 * desc.data.snap[1] = 00; 86 * desc.data.snap[2] = 07; 87 * desc.data.snap[3] = 80; 88 * desc.data.snap[4] = 9B; 89 */ 90 struct ndrv_demux_desc { 91 u_int16_t type; 92 u_int16_t length; 93 union{ 94 u_int16_t ether_type; 95 u_int8_t sap[3]; 96 u_int8_t snap[5]; 97 u_int8_t other[28]; 98 } data; 99 }; 100 101 #define NDRV_PROTOCOL_DESC_VERS 1 102 103 /* 104 * Struct: ndrv_protocol_desc 105 * Purpose: 106 * Used to "bind" an NDRV socket so that packets that match 107 * given protocol demux descriptions can be received: 108 * Field: 109 * version : must be NDRV_PROTOCOL_DESC_VERS 110 * protocol_family : unique identifier for this protocol 111 * demux_count : number of demux_list descriptors in demux_list; maximum of 10 112 * demux_list : pointer to array of demux descriptors 113 */ 114 struct ndrv_protocol_desc { 115 u_int32_t version; 116 u_int32_t protocol_family; 117 u_int32_t demux_count; 118 struct ndrv_demux_desc *demux_list; 119 }; 120 121 #ifdef KERNEL_PRIVATE 122 /* LP64 version of ndrv_protocol_desc. all pointers 123 * grow when we're dealing with a 64-bit process. 124 * WARNING - keep in sync with ndrv_protocol_desc 125 */ 126 struct ndrv_protocol_desc64 { 127 u_int32_t version; 128 u_int32_t protocol_family; 129 u_int32_t demux_count; 130 user64_addr_t demux_list __attribute__((aligned(8))); 131 }; 132 133 struct ndrv_protocol_desc32 { 134 u_int32_t version; 135 u_int32_t protocol_family; 136 u_int32_t demux_count; 137 user32_addr_t demux_list; 138 }; 139 #endif /* KERNEL_PRIVATE */ 140 141 #define SOL_NDRVPROTO NDRVPROTO_NDRV /* Use this socket level */ 142 #define NDRV_DELDMXSPEC 0x02 /* Delete the registered protocol */ 143 #define NDRV_SETDMXSPEC 0x04 /* Set the protocol spec */ 144 #define NDRV_ADDMULTICAST 0x05 /* Add a physical multicast address */ 145 #define NDRV_DELMULTICAST 0x06 /* Delete a phyiscal multicast */ 146 147 /* 148 * SOL_NDRVPROTO - use this for the socket level when calling setsocketopt 149 * NDRV_DELDMXSPEC - removes the registered protocol and all related demuxes 150 * NDRV_SETDMXSPEC - set the protocol to receive, use struct ndrv_protocol_desc 151 * as the parameter. 152 * NDRV_ADDMULTICAST - Enable reception of a phyiscal multicast address, use 153 * a sockaddr of the appropriate type for the media in use. 154 * NDRV_DELMULTICAST - Disable reception of a phyiscal multicast address, use 155 * a sockaddr of the appropriate type for the media in use. 156 * 157 * When adding multicasts, the multicasts are ref counted. If the multicast is 158 * already registered in the kernel, the count will be bumped. When deleting 159 * the multicast, the count is decremented. If the count reaches zero the 160 * multicast is removed. If your process is killed, PF_NDRV will unregister 161 * the mulitcasts you've added. You can only delete multicasts you've added 162 * on the same socket. 163 * 164 * If the interface goes away while your socket is open, your protocol is 165 * immediately detached and sending/receiving is disabled on the socket. 166 * If you need a chance to do something, please file a bug and we can give 167 * you a second or two. 168 */ 169 170 /* Max number of descriptions allowed by default */ 171 #define NDRV_DMUX_MAX_DESCR 1024 172 173 /* 174 * sysctl MIB tags at the kern.ipc.nrdv level 175 */ 176 #define NRDV_MULTICAST_ADDRS_PER_SOCK 1 /* to toggle NDRV_DMUX_MAX_DESCR value */ 177 178 #endif /* _NET_NDRV_H */ 179