ng_pppoe.h revision 67506
1 2/* 3 * ng_pppoe.h 4 * 5 * Copyright (c) 1996-1999 Whistle Communications, Inc. 6 * All rights reserved. 7 * 8 * Subject to the following obligations and disclaimer of warranty, use and 9 * redistribution of this software, in source or object code forms, with or 10 * without modifications are expressly permitted by Whistle Communications; 11 * provided, however, that: 12 * 1. Any and all reproductions of the source or object code must include the 13 * copyright notice above and the following disclaimer of warranties; and 14 * 2. No rights are granted, in any manner or form, to use Whistle 15 * Communications, Inc. trademarks, including the mark "WHISTLE 16 * COMMUNICATIONS" on advertising, endorsements, or otherwise except as 17 * such appears in the above copyright notice or in the software. 18 * 19 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND 20 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO 21 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE, 22 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF 23 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. 24 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY 25 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS 26 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE. 27 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES 28 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING 29 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, 30 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR 31 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY 32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 34 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY 35 * OF SUCH DAMAGE. 36 * 37 * Author: Julian Elischer <julian@freebsd.org> 38 * 39 * $FreeBSD: head/sys/netgraph/ng_pppoe.h 67506 2000-10-24 17:32:45Z julian $ 40 * $Whistle: ng_pppoe.h,v 1.7 1999/10/16 10:16:43 julian Exp $ 41 */ 42 43#ifndef _NETGRAPH_PPPOE_H_ 44#define _NETGRAPH_PPPOE_H_ 45 46/******************************************************************** 47 * Netgraph hook constants etc. 48 ********************************************************************/ 49/* Node type name. This should be unique among all netgraph node types */ 50#define NG_PPPOE_NODE_TYPE "pppoe" 51 52#define NGM_PPPOE_COOKIE 939032003 53 54/* Number of active sessions we can handle */ 55#define PPPOE_NUM_SESSIONS 16 /* for now */ 56#define PPPOE_SERVICE_NAME_SIZE 64 /* for now */ 57 58/* Hook names */ 59#define NG_PPPOE_HOOK_ETHERNET "ethernet" 60#define NG_PPPOE_HOOK_PADI "PADI" /* default PADI requests come here */ 61#define NG_PPPOE_HOOK_S_LEADIN "service" /* PADO responses from PADI */ 62#define NG_PPPOE_HOOK_C_LEADIN "client" /* Connect message starts this */ 63#define NG_PPPOE_HOOK_DEBUG "debug" 64 65/********************************************************************** 66 * Netgraph commands understood by this node type. 67 * FAIL, SUCCESS and CLOSE are sent by the node rather than received. 68 ********************************************************************/ 69enum cmd { 70 NGM_PPPOE_SET_FLAG = 1, 71 NGM_PPPOE_CONNECT = 2, /* Client, Try find this service */ 72 NGM_PPPOE_LISTEN = 3, /* Server, Await a request for this service */ 73 NGM_PPPOE_OFFER = 4, /* Server, hook X should respond (*) */ 74 NGM_PPPOE_SUCCESS = 5, /* State machine connected */ 75 NGM_PPPOE_FAIL = 6, /* State machine could not connect */ 76 NGM_PPPOE_CLOSE = 7, /* Session closed down */ 77 NGM_PPPOE_GET_STATUS 78}; 79 80/*********************** 81 * Structures passed in the various netgraph command messages. 82 ***********************/ 83/* This structure is returned by the NGM_PPPOE_GET_STATUS command */ 84struct ngpppoestat { 85 u_int packets_in; /* packets in from ethernet */ 86 u_int packets_out; /* packets out towards ethernet */ 87}; 88 89/* 90 * When this structure is accepted by the NGM_PPPOE_CONNECT command : 91 * The data field is MANDATORY. 92 * The session sends out a PADI request for the named service. 93 * 94 * 95 * When this structure is accepted by the NGM_PPPOE_WAIT command. 96 * If no service is given this is assumed to accept ALL PADI requests. 97 * This may at some time take a regexp expression, but not yet. 98 * Matching PADI requests will be passed up the named hook. 99 * 100 * 101 * When this structure is accepted by the NGM_PPPOE_OFFER command: 102 * The AC-NAme field is set from that given and a PADI 103 * packet is expected to arrive from the session control daemon, on the 104 * named hook. The session will then issue the appropriate PADO 105 * and begin negotiation. 106 */ 107struct ngpppoe_init_data { 108 char hook[NG_HOOKLEN + 1]; /* hook to monitor on */ 109 u_int16_t data_len; /* Length of the service name */ 110 char data[0]; /* init data goes here */ 111}; 112 113/* 114 * This structure is used by the asychronous success and failure messages. 115 * (to report which hook has failed or connected). The message is sent 116 * to whoever requested the connection. (close may use this too). 117 */ 118struct ngpppoe_sts { 119 char hook[NG_HOOKLEN + 1]; /* hook associated with event session */ 120}; 121 122 123/******************************************************************** 124 * Constants and definitions specific to pppoe 125 ********************************************************************/ 126 127#define PPPOE_TIMEOUT_LIMIT 64 128#define PPPOE_OFFER_TIMEOUT 16 129#define PPPOE_INITIAL_TIMEOUT 2 130 131/* Codes to identify message types */ 132#define PADI_CODE 0x09 133#define PADO_CODE 0x07 134#define PADR_CODE 0x19 135#define PADS_CODE 0x65 136#define PADT_CODE 0xa7 137 138/* Tag identifiers */ 139#if BYTE_ORDER == BIG_ENDIAN 140#define PTT_EOL (0x0000) 141#define PTT_SRV_NAME (0x0101) 142#define PTT_AC_NAME (0x0102) 143#define PTT_HOST_UNIQ (0x0103) 144#define PTT_AC_COOKIE (0x0104) 145#define PTT_VENDOR (0x0105) 146#define PTT_RELAY_SID (0x0106) 147#define PTT_SRV_ERR (0x0201) 148#define PTT_SYS_ERR (0x0202) 149#define PTT_GEN_ERR (0x0203) 150 151#define ETHERTYPE_PPPOE_DISC 0x8863 /* pppoe discovery packets */ 152#define ETHERTYPE_PPPOE_SESS 0x8864 /* pppoe session packets */ 153#else 154#define PTT_EOL (0x0000) 155#define PTT_SRV_NAME (0x0101) 156#define PTT_AC_NAME (0x0201) 157#define PTT_HOST_UNIQ (0x0301) 158#define PTT_AC_COOKIE (0x0401) 159#define PTT_VENDOR (0x0501) 160#define PTT_RELAY_SID (0x0601) 161#define PTT_SRV_ERR (0x0102) 162#define PTT_SYS_ERR (0x0202) 163#define PTT_GEN_ERR (0x0302) 164 165#define ETHERTYPE_PPPOE_DISC 0x6388 /* pppoe discovery packets */ 166#define ETHERTYPE_PPPOE_SESS 0x6488 /* pppoe session packets */ 167#endif 168 169struct pppoe_tag { 170 u_int16_t tag_type; 171 u_int16_t tag_len; 172 char tag_data[0]; 173}__attribute ((packed)); 174 175struct pppoe_hdr{ 176 u_int8_t ver:4; 177 u_int8_t type:4; 178 u_int8_t code; 179 u_int16_t sid; 180 u_int16_t length; 181 struct pppoe_tag tag[0]; 182}__attribute__ ((packed)); 183 184 185struct pppoe_full_hdr { 186 struct ether_header eh; 187 struct pppoe_hdr ph; 188}__attribute__ ((packed)); 189 190union packet { 191 struct pppoe_full_hdr pkt_header; 192 u_int8_t bytes[2048]; 193}; 194 195struct datatag { 196 struct pppoe_tag hdr; 197 u_int8_t data[PPPOE_SERVICE_NAME_SIZE]; 198}; 199 200 201/* 202 * Define the order in which we will place tags in packets 203 * this may be ignored 204 */ 205/* for PADI */ 206#define TAGI_SVC 0 207#define TAGI_HUNIQ 1 208/* for PADO */ 209#define TAGO_ACNAME 0 210#define TAGO_SVC 1 211#define TAGO_COOKIE 2 212#define TAGO_HUNIQ 3 213/* for PADR */ 214#define TAGR_SVC 0 215#define TAGR_HUNIQ 1 216#define TAGR_COOKIE 2 217/* for PADS */ 218#define TAGS_ACNAME 0 219#define TAGS_SVC 1 220#define TAGS_COOKIE 2 221#define TAGS_HUNIQ 3 222/* for PADT */ 223 224#endif /* _NETGRAPH_PPPOE_H_ */ 225 226