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bfa7e882d1
and add a sysctl to pppoe to activate non standard ethertypes so that idiot ISPs (apparently in France) who use equipment from idiot suppliers (rumour says 3com) who use nonstandard ethertypes can still connect. "yep, sure we do pppoe, we use a different identifier to that dictated in the standard, but sure it's pppoe!" sysctl -w net.graph.stupid_isp=1 enables the changeover.
257 lines
8.4 KiB
C
257 lines
8.4 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@freebsd.org>
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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_SERVICE = 8, /* additional Service to advertise (in PADO) */
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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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/* Keep this in sync with the above structure definition */
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#define NG_PPPOESTAT_TYPE_INFO { \
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{ \
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{ "packets_in", &ng_parse_uint_type }, \
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{ "packets_out", &ng_parse_uint_type }, \
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{ NULL } \
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} \
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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_LISTEN 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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/* Keep this in sync with the above structure definition */
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#define NG_PPPOE_INIT_DATA_TYPE_INFO { \
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{ \
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{ "hook", &ng_parse_hookbuf_type }, \
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{ "data", &ng_parse_sizedstring_type }, \
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{ NULL } \
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} \
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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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/* Keep this in sync with the above structure definition */
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#define NG_PPPOE_STS_TYPE_INFO { \
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{ \
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{ "hook", &ng_parse_hookbuf_type }, \
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{ NULL } \
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} \
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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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#define ETHERTYPE_PPPOE_STUPID_DISC 0x3c12 /* pppoe discovery packets 3com? */
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#define ETHERTYPE_PPPOE_STUPID_SESS 0x3c13 /* pppoe session packets 3com? */
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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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#define ETHERTYPE_PPPOE_STUPID_DISC 0x123c /* pppoe discovery packets 3com? */
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#define ETHERTYPE_PPPOE_STUPID_SESS 0x133c /* pppoe session packets 3com? */
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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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