The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    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: stable/3/sys/netgraph/ng_pppoe.h 67532 2000-10-24 22:45:12Z 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  ********************************************************************/
   69 enum 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 */
   84 struct 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  */
  107 struct 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  */
  118 struct 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 
  169 struct pppoe_tag {
  170         u_int16_t tag_type;
  171         u_int16_t tag_len;
  172         char tag_data[0];
  173 }__attribute ((packed));
  174 
  175 struct 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 
  185 struct pppoe_full_hdr {
  186         struct  ether_header eh;
  187         struct pppoe_hdr ph;
  188 }__attribute__ ((packed));
  189 
  190 union   packet {
  191         struct pppoe_full_hdr   pkt_header;
  192         u_int8_t        bytes[2048];
  193 };
  194 
  195 struct 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 

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