FreeBSD/Linux Kernel Cross Reference
sys/netgraph/ng_pppoe.h

     
     /*
      * 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@freebsd.org>
     *
     * $FreeBSD$
     * $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, CLOSE and ACNAME 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_SERVICE  = 8, /* additional Service to advertise (in PADO) */
            NGM_PPPOE_ACNAME   = 9, /* AC_NAME for informational purposes */
            NGM_PPPOE_GET_STATUS = 10, /* data in/out */
            NGM_PPPOE_SESSIONID  = 11  /* Session_ID for informational purposes */
    };
    
    /***********************
     * 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_LISTEN command.
     * If no service is given this is assumed to accept ALL PADI requests.
    * This may at some time take a regexp expression, 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
   #define PPPOE_INITIAL_TIMEOUT 2
   
   /* 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   (0x0110)
   #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       */
   #define ETHERTYPE_PPPOE_STUPID_DISC 0x3c12 /* pppoe discovery packets 3com? */
   #define ETHERTYPE_PPPOE_STUPID_SESS 0x3c13 /* pppoe session packets   3com? */
   #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   (0x1001)
   #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       */
   #define ETHERTYPE_PPPOE_STUPID_DISC 0x123c /* pppoe discovery packets 3com? */
   #define ETHERTYPE_PPPOE_STUPID_SESS 0x133c /* pppoe session packets   3com? */
   #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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