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226 lines
7.4 KiB
C
226 lines
7.4 KiB
C
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/*
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* ng_pppoe.h
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*
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* Copyright (c) 1996-1999 Whistle Communications, Inc.
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* All rights reserved.
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*
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* Subject to the following obligations and disclaimer of warranty, use and
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* redistribution of this software, in source or object code forms, with or
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* without modifications are expressly permitted by Whistle Communications;
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* provided, however, that:
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* 1. Any and all reproductions of the source or object code must include the
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* copyright notice above and the following disclaimer of warranties; and
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* 2. No rights are granted, in any manner or form, to use Whistle
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* Communications, Inc. trademarks, including the mark "WHISTLE
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* COMMUNICATIONS" on advertising, endorsements, or otherwise except as
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* such appears in the above copyright notice or in the software.
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*
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* THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
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* TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
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* REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
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* INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
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* WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
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* REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
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* SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
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* IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
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* RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
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* WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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* PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* Author: Julian Elischer <julian@whistle.com>
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*
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* $FreeBSD$
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* $Whistle: ng_pppoe.h,v 1.7 1999/10/16 10:16:43 julian Exp $
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*/
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#ifndef _NETGRAPH_PPPOE_H_
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#define _NETGRAPH_PPPOE_H_
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/********************************************************************
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* Netgraph hook constants etc.
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********************************************************************/
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/* Node type name. This should be unique among all netgraph node types */
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#define NG_PPPOE_NODE_TYPE "pppoe"
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#define NGM_PPPOE_COOKIE 939032003
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/* Number of active sessions we can handle */
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#define PPPOE_NUM_SESSIONS 16 /* for now */
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#define PPPOE_SERVICE_NAME_SIZE 64 /* for now */
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/* Hook names */
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#define NG_PPPOE_HOOK_ETHERNET "ethernet"
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#define NG_PPPOE_HOOK_PADI "PADI" /* default PADI requests come here */
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#define NG_PPPOE_HOOK_S_LEADIN "service" /* PADO responses from PADI */
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#define NG_PPPOE_HOOK_C_LEADIN "client" /* Connect message starts this */
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#define NG_PPPOE_HOOK_DEBUG "debug"
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/**********************************************************************
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* Netgraph commands understood by this node type.
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* FAIL, SUCCESS and CLOSE are sent by the node rather than received.
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********************************************************************/
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enum cmd {
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NGM_PPPOE_SET_FLAG = 1,
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NGM_PPPOE_CONNECT = 2, /* Client, Try find this service */
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NGM_PPPOE_LISTEN = 3, /* Server, Await a request for this service */
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NGM_PPPOE_OFFER = 4, /* Server, hook X should respond (*) */
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NGM_PPPOE_SUCCESS = 5, /* State machine connected */
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NGM_PPPOE_FAIL = 6, /* State machine could not connect */
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NGM_PPPOE_CLOSE = 7, /* Session closed down */
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NGM_PPPOE_GET_STATUS
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};
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/***********************
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* Structures passed in the various netgraph command messages.
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***********************/
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/* This structure is returned by the NGM_PPPOE_GET_STATUS command */
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struct ngpppoestat {
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u_int packets_in; /* packets in from ethernet */
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u_int packets_out; /* packets out towards ethernet */
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};
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/*
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* When this structure is accepted by the NGM_PPPOE_CONNECT command :
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* The data field is MANDATORY.
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* The session sends out a PADI request for the named service.
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*
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*
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* When this structure is accepted by the NGM_PPPOE_WAIT command.
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* If no service is given this is assumed to accept ALL PADI requests.
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* This may at some time take a regexp expression, but not yet.
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* Matching PADI requests will be passed up the named hook.
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*
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*
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* When this structure is accepted by the NGM_PPPOE_OFFER command:
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* The AC-NAme field is set from that given and a PADI
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* packet is expected to arrive from the session control daemon, on the
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* named hook. The session will then issue the appropriate PADO
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* and begin negotiation.
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*/
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struct ngpppoe_init_data {
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char hook[NG_HOOKLEN + 1]; /* hook to monitor on */
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u_int16_t data_len; /* Length of the service name */
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char data[0]; /* init data goes here */
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};
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/*
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* This structure is used by the asychronous success and failure messages.
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* (to report which hook has failed or connected). The message is sent
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* to whoever requested the connection. (close may use this too).
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*/
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struct ngpppoe_sts {
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char hook[NG_HOOKLEN + 1]; /* hook associated with event session */
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};
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/********************************************************************
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* Constants and definitions specific to pppoe
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********************************************************************/
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#define PPPOE_TIMEOUT_LIMIT 64
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#define PPPOE_OFFER_TIMEOUT 16
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#define PPPOE_INITIAL_TIMEOUT 2
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/* Codes to identify message types */
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#define PADI_CODE 0x09
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#define PADO_CODE 0x07
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#define PADR_CODE 0x19
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#define PADS_CODE 0x65
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#define PADT_CODE 0xa7
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/* Tag identifiers */
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#if BYTE_ORDER == BIG_ENDIAN
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#define PTT_EOL (0x0000)
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#define PTT_SRV_NAME (0x0101)
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#define PTT_AC_NAME (0x0102)
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#define PTT_HOST_UNIQ (0x0103)
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#define PTT_AC_COOKIE (0x0104)
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#define PTT_VENDOR (0x0105)
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#define PTT_RELAY_SID (0x0106)
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#define PTT_SRV_ERR (0x0201)
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#define PTT_SYS_ERR (0x0202)
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#define PTT_GEN_ERR (0x0203)
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#define ETHERTYPE_PPPOE_DISC 0x8863 /* pppoe discovery packets */
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#define ETHERTYPE_PPPOE_SESS 0x8864 /* pppoe session packets */
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#else
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#define PTT_EOL (0x0000)
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#define PTT_SRV_NAME (0x0101)
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#define PTT_AC_NAME (0x0201)
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#define PTT_HOST_UNIQ (0x0301)
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#define PTT_AC_COOKIE (0x0401)
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#define PTT_VENDOR (0x0501)
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#define PTT_RELAY_SID (0x0601)
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#define PTT_SRV_ERR (0x0102)
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#define PTT_SYS_ERR (0x0202)
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#define PTT_GEN_ERR (0x0302)
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#define ETHERTYPE_PPPOE_DISC 0x6388 /* pppoe discovery packets */
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#define ETHERTYPE_PPPOE_SESS 0x6488 /* pppoe session packets */
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#endif
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struct pppoe_tag {
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u_int16_t tag_type;
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u_int16_t tag_len;
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char tag_data[0];
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}__attribute ((packed));
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struct pppoe_hdr{
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u_int8_t ver:4;
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u_int8_t type:4;
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u_int8_t code;
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u_int16_t sid;
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u_int16_t length;
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struct pppoe_tag tag[0];
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}__attribute__ ((packed));
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struct pppoe_full_hdr {
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struct ether_header eh;
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struct pppoe_hdr ph;
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}__attribute__ ((packed));
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union packet {
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struct pppoe_full_hdr pkt_header;
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u_int8_t bytes[2048];
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};
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struct datatag {
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struct pppoe_tag hdr;
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u_int8_t data[PPPOE_SERVICE_NAME_SIZE];
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};
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/*
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* Define the order in which we will place tags in packets
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* this may be ignored
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*/
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/* for PADI */
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#define TAGI_SVC 0
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#define TAGI_HUNIQ 1
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/* for PADO */
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#define TAGO_ACNAME 0
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#define TAGO_SVC 1
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#define TAGO_COOKIE 2
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#define TAGO_HUNIQ 3
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/* for PADR */
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#define TAGR_SVC 0
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#define TAGR_HUNIQ 1
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#define TAGR_COOKIE 2
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/* for PADS */
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#define TAGS_ACNAME 0
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#define TAGS_SVC 1
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#define TAGS_COOKIE 2
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#define TAGS_HUNIQ 3
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/* for PADT */
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#endif /* _NETGRAPH_PPPOE_H_ */
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