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