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: releng/5.2/sys/netgraph/ng_pppoe.h 122481 2003-11-11 12:30:37Z ru $
   40  * $Whistle: ng_pppoe.h,v 1.7 1999/10/16 10:16:43 julian Exp $
   41  */
   42 
   43 #ifndef _NETGRAPH_NG_PPPOE_H_
   44 #define _NETGRAPH_NG_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, CLOSE and ACNAME 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_SERVICE  = 8, /* additional Service to advertise (in PADO) */
   78         NGM_PPPOE_ACNAME   = 9, /* AC_NAME for informational purposes */
   79         NGM_PPPOE_GET_STATUS = 10, /* data in/out */
   80         NGM_PPPOE_SESSIONID  = 11  /* Session_ID for informational purposes */
   81 };
   82 
   83 /***********************
   84  * Structures passed in the various netgraph command messages.
   85  ***********************/
   86 /* This structure is returned by the NGM_PPPOE_GET_STATUS command */
   87 struct ngpppoestat {
   88         u_int   packets_in;     /* packets in from ethernet */
   89         u_int   packets_out;    /* packets out towards ethernet */
   90 };
   91 
   92 /* Keep this in sync with the above structure definition */
   93 #define NG_PPPOESTAT_TYPE_INFO  {                               \
   94           { "packets_in",       &ng_parse_uint_type     },      \
   95           { "packets_out",      &ng_parse_uint_type     },      \
   96           { NULL }                                              \
   97 }
   98 
   99 /*
  100  * When this structure is accepted by the NGM_PPPOE_CONNECT command :
  101  * The data field is MANDATORY.
  102  * The session sends out a PADI request for the named service.
  103  *
  104  *
  105  * When this structure is accepted by the NGM_PPPOE_LISTEN command.
  106  * If no service is given this is assumed to accept ALL PADI requests.
  107  * This may at some time take a regexp expression, but not yet.
  108  * Matching PADI requests will be passed up the named hook.
  109  *
  110  *
  111  * When this structure is accepted by the NGM_PPPOE_OFFER command:
  112  * The AC-NAme field is set from that given and a PADI
  113  * packet is expected to arrive from the session control daemon, on the
  114  * named hook. The session will then issue the appropriate PADO
  115  * and begin negotiation.
  116  */
  117 struct ngpppoe_init_data {
  118         char            hook[NG_HOOKLEN + 1];   /* hook to monitor on */
  119         u_int16_t       data_len;               /* Length of the service name */
  120         char            data[0];                /* init data goes here */
  121 };
  122 
  123 /* Keep this in sync with the above structure definition */
  124 #define NG_PPPOE_INIT_DATA_TYPE_INFO    {               \
  125           { "hook",     &ng_parse_hookbuf_type  },      \
  126           { "data",     &ng_parse_sizedstring_type },   \
  127           { NULL }                                      \
  128 }
  129 
  130 /*
  131  * This structure is used by the asychronous success and failure messages.
  132  * (to report which hook has failed or connected). The message is sent
  133  * to whoever requested the connection. (close may use this too).
  134  */
  135 struct ngpppoe_sts {
  136         char    hook[NG_HOOKLEN + 1]; /* hook associated with event session */
  137 };
  138 
  139 /* Keep this in sync with the above structure definition */
  140 #define NG_PPPOE_STS_TYPE_INFO          {               \
  141           { "hook",     &ng_parse_hookbuf_type  },      \
  142           { NULL }                                      \
  143 }
  144 
  145 
  146 /********************************************************************
  147  * Constants and definitions specific to pppoe
  148  ********************************************************************/
  149 
  150 #define PPPOE_TIMEOUT_LIMIT 64
  151 #define PPPOE_OFFER_TIMEOUT 16
  152 #define PPPOE_INITIAL_TIMEOUT 2
  153 
  154 /* Codes to identify message types */
  155 #define PADI_CODE       0x09
  156 #define PADO_CODE       0x07
  157 #define PADR_CODE       0x19
  158 #define PADS_CODE       0x65
  159 #define PADT_CODE       0xa7
  160 
  161 /* Tag identifiers */
  162 #if BYTE_ORDER == BIG_ENDIAN
  163 #define PTT_EOL         (0x0000)
  164 #define PTT_SRV_NAME    (0x0101)
  165 #define PTT_AC_NAME     (0x0102)
  166 #define PTT_HOST_UNIQ   (0x0103)
  167 #define PTT_AC_COOKIE   (0x0104)
  168 #define PTT_VENDOR      (0x0105)
  169 #define PTT_RELAY_SID   (0x0106)
  170 #define PTT_SRV_ERR     (0x0201)
  171 #define PTT_SYS_ERR     (0x0202)
  172 #define PTT_GEN_ERR     (0x0203)
  173 
  174 #define ETHERTYPE_PPPOE_DISC    0x8863  /* pppoe discovery packets     */
  175 #define ETHERTYPE_PPPOE_SESS    0x8864  /* pppoe session packets       */
  176 #define ETHERTYPE_PPPOE_STUPID_DISC 0x3c12 /* pppoe discovery packets 3com? */
  177 #define ETHERTYPE_PPPOE_STUPID_SESS 0x3c13 /* pppoe session packets   3com? */
  178 #else
  179 #define PTT_EOL         (0x0000)
  180 #define PTT_SRV_NAME    (0x0101)
  181 #define PTT_AC_NAME     (0x0201)
  182 #define PTT_HOST_UNIQ   (0x0301)
  183 #define PTT_AC_COOKIE   (0x0401)
  184 #define PTT_VENDOR      (0x0501)
  185 #define PTT_RELAY_SID   (0x0601)
  186 #define PTT_SRV_ERR     (0x0102)
  187 #define PTT_SYS_ERR     (0x0202)
  188 #define PTT_GEN_ERR     (0x0302)
  189 
  190 #define ETHERTYPE_PPPOE_DISC    0x6388  /* pppoe discovery packets     */
  191 #define ETHERTYPE_PPPOE_SESS    0x6488  /* pppoe session packets       */
  192 #define ETHERTYPE_PPPOE_STUPID_DISC 0x123c /* pppoe discovery packets 3com? */
  193 #define ETHERTYPE_PPPOE_STUPID_SESS 0x133c /* pppoe session packets   3com? */
  194 #endif
  195 
  196 struct pppoe_tag {
  197         u_int16_t tag_type;
  198         u_int16_t tag_len;
  199         char tag_data[0];
  200 }__packed;
  201 
  202 struct pppoe_hdr{
  203         u_int8_t ver:4;
  204         u_int8_t type:4;
  205         u_int8_t code;
  206         u_int16_t sid;
  207         u_int16_t length;
  208         struct pppoe_tag tag[0];
  209 }__packed;
  210 
  211 
  212 struct pppoe_full_hdr {
  213         struct  ether_header eh;
  214         struct pppoe_hdr ph;
  215 }__packed;
  216 
  217 union   packet {
  218         struct pppoe_full_hdr   pkt_header;
  219         u_int8_t        bytes[2048];
  220 };
  221 
  222 struct datatag {
  223         struct pppoe_tag hdr;
  224         u_int8_t        data[PPPOE_SERVICE_NAME_SIZE];
  225 };     
  226 
  227 
  228 /*
  229  * Define the order in which we will place tags in packets
  230  * this may be ignored
  231  */
  232 /* for PADI */
  233 #define TAGI_SVC 0
  234 #define TAGI_HUNIQ 1
  235 /* for PADO */
  236 #define TAGO_ACNAME 0
  237 #define TAGO_SVC 1
  238 #define TAGO_COOKIE 2
  239 #define TAGO_HUNIQ 3
  240 /* for PADR */
  241 #define TAGR_SVC 0
  242 #define TAGR_HUNIQ 1
  243 #define TAGR_COOKIE 2
  244 /* for PADS */
  245 #define TAGS_ACNAME 0
  246 #define TAGS_SVC 1
  247 #define TAGS_COOKIE 2
  248 #define TAGS_HUNIQ 3
  249 /* for PADT */
  250 
  251 #endif /* _NETGRAPH_NG_PPPOE_H_ */
  252 

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