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  * ng_pppoe.h
    3  */
    4 
    5 /*-
    6  * Copyright (c) 1996-1999 Whistle Communications, Inc.
    7  * All rights reserved.
    8  * 
    9  * Subject to the following obligations and disclaimer of warranty, use and
   10  * redistribution of this software, in source or object code forms, with or
   11  * without modifications are expressly permitted by Whistle Communications;
   12  * provided, however, that:
   13  * 1. Any and all reproductions of the source or object code must include the
   14  *    copyright notice above and the following disclaimer of warranties; and
   15  * 2. No rights are granted, in any manner or form, to use Whistle
   16  *    Communications, Inc. trademarks, including the mark "WHISTLE
   17  *    COMMUNICATIONS" on advertising, endorsements, or otherwise except as
   18  *    such appears in the above copyright notice or in the software.
   19  * 
   20  * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
   21  * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
   22  * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
   23  * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
   24  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
   25  * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
   26  * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
   27  * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
   28  * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
   29  * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
   30  * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
   31  * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
   32  * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
   33  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   34  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   35  * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
   36  * OF SUCH DAMAGE.
   37  *
   38  * Author: Julian Elischer <julian@freebsd.org>
   39  *
   40  * $FreeBSD: src/sys/netgraph/ng_pppoe.h,v 1.20.2.1 2005/01/31 23:26:29 imp Exp $
   41  * $Whistle: ng_pppoe.h,v 1.7 1999/10/16 10:16:43 julian Exp $
   42  */
   43 
   44 #ifndef _NETGRAPH_NG_PPPOE_H_
   45 #define _NETGRAPH_NG_PPPOE_H_
   46 
   47 /********************************************************************
   48  * Netgraph hook constants etc.
   49  ********************************************************************/
   50 /* Node type name. This should be unique among all netgraph node types */
   51 #define NG_PPPOE_NODE_TYPE      "pppoe"
   52 
   53 #define NGM_PPPOE_COOKIE                1089893072
   54 
   55 /* Number of active sessions we can handle */
   56 #define PPPOE_NUM_SESSIONS              16 /* for now */
   57 #define PPPOE_SERVICE_NAME_SIZE         64 /* for now */
   58 
   59 /* Hook names */
   60 #define NG_PPPOE_HOOK_ETHERNET  "ethernet"
   61 #define NG_PPPOE_HOOK_PADI      "PADI"    /* default PADI requests come here */
   62 #define NG_PPPOE_HOOK_S_LEADIN  "service" /* PADO responses from PADI */
   63 #define NG_PPPOE_HOOK_C_LEADIN  "client"  /* Connect message starts this */
   64 #define NG_PPPOE_HOOK_DEBUG     "debug"
   65 
   66 /* Mode names */
   67 #define NG_PPPOE_STANDARD       "standard"
   68 #define NG_PPPOE_NONSTANDARD    "3Com"
   69 
   70 /**********************************************************************
   71  * Netgraph commands understood by this node type.
   72  * FAIL, SUCCESS, CLOSE and ACNAME are sent by the node rather than received.
   73  ********************************************************************/
   74 enum cmd {
   75         NGM_PPPOE_SET_FLAG = 1,
   76         NGM_PPPOE_CONNECT  = 2, /* Client, Try find this service */
   77         NGM_PPPOE_LISTEN   = 3, /* Server, Await a request for this service */
   78         NGM_PPPOE_OFFER    = 4, /* Server, hook X should respond (*) */
   79         NGM_PPPOE_SUCCESS  = 5, /* State machine connected */
   80         NGM_PPPOE_FAIL     = 6, /* State machine could not connect */
   81         NGM_PPPOE_CLOSE    = 7, /* Session closed down */
   82         NGM_PPPOE_SERVICE  = 8, /* additional Service to advertise (in PADO) */
   83         NGM_PPPOE_ACNAME   = 9, /* AC_NAME for informational purposes */
   84         NGM_PPPOE_GET_STATUS = 10, /* data in/out */
   85         NGM_PPPOE_SESSIONID  = 11,  /* Session_ID for informational purposes */
   86         NGM_PPPOE_SETMODE  = 12, /* set to standard or 3Com mode */
   87         NGM_PPPOE_GETMODE  = 13, /* see current mode */
   88 };
   89 
   90 /***********************
   91  * Structures passed in the various netgraph command messages.
   92  ***********************/
   93 /* This structure is returned by the NGM_PPPOE_GET_STATUS command */
   94 struct ngpppoestat {
   95         u_int   packets_in;     /* packets in from ethernet */
   96         u_int   packets_out;    /* packets out towards ethernet */
   97 };
   98 
   99 /* Keep this in sync with the above structure definition */
  100 #define NG_PPPOESTAT_TYPE_INFO  {                               \
  101           { "packets_in",       &ng_parse_uint_type     },      \
  102           { "packets_out",      &ng_parse_uint_type     },      \
  103           { NULL }                                              \
  104 }
  105 
  106 /*
  107  * When this structure is accepted by the NGM_PPPOE_CONNECT command :
  108  * The data field is MANDATORY.
  109  * The session sends out a PADI request for the named service.
  110  *
  111  *
  112  * When this structure is accepted by the NGM_PPPOE_LISTEN command.
  113  * If no service is given this is assumed to accept ALL PADI requests.
  114  * This may at some time take a regexp expression, but not yet.
  115  * Matching PADI requests will be passed up the named hook.
  116  *
  117  *
  118  * When this structure is accepted by the NGM_PPPOE_OFFER command:
  119  * The AC-NAme field is set from that given and a PADI
  120  * packet is expected to arrive from the session control daemon, on the
  121  * named hook. The session will then issue the appropriate PADO
  122  * and begin negotiation.
  123  */
  124 struct ngpppoe_init_data {
  125         char            hook[NG_HOOKSIZ];       /* hook to monitor on */
  126         u_int16_t       data_len;               /* Length of the service name */
  127         char            data[0];                /* init data goes here */
  128 };
  129 
  130 /* Keep this in sync with the above structure definition */
  131 #define NG_PPPOE_INIT_DATA_TYPE_INFO    {               \
  132           { "hook",     &ng_parse_hookbuf_type  },      \
  133           { "data",     &ng_parse_sizedstring_type },   \
  134           { NULL }                                      \
  135 }
  136 
  137 /*
  138  * This structure is used by the asychronous success and failure messages.
  139  * (to report which hook has failed or connected). The message is sent
  140  * to whoever requested the connection. (close may use this too).
  141  */
  142 struct ngpppoe_sts {
  143         char    hook[NG_HOOKSIZ];       /* hook associated with event session */
  144 };
  145 
  146 /* Keep this in sync with the above structure definition */
  147 #define NG_PPPOE_STS_TYPE_INFO          {               \
  148           { "hook",     &ng_parse_hookbuf_type  },      \
  149           { NULL }                                      \
  150 }
  151 
  152 
  153 /********************************************************************
  154  * Constants and definitions specific to pppoe
  155  ********************************************************************/
  156 
  157 #define PPPOE_TIMEOUT_LIMIT 64
  158 #define PPPOE_OFFER_TIMEOUT 16
  159 #define PPPOE_INITIAL_TIMEOUT 2
  160 
  161 /* Codes to identify message types */
  162 #define PADI_CODE       0x09
  163 #define PADO_CODE       0x07
  164 #define PADR_CODE       0x19
  165 #define PADS_CODE       0x65
  166 #define PADT_CODE       0xa7
  167 
  168 /* Tag identifiers */
  169 #if BYTE_ORDER == BIG_ENDIAN
  170 #define PTT_EOL         (0x0000)
  171 #define PTT_SRV_NAME    (0x0101)
  172 #define PTT_AC_NAME     (0x0102)
  173 #define PTT_HOST_UNIQ   (0x0103)
  174 #define PTT_AC_COOKIE   (0x0104)
  175 #define PTT_VENDOR      (0x0105)
  176 #define PTT_RELAY_SID   (0x0110)
  177 #define PTT_SRV_ERR     (0x0201)
  178 #define PTT_SYS_ERR     (0x0202)
  179 #define PTT_GEN_ERR     (0x0203)
  180 
  181 #define ETHERTYPE_PPPOE_DISC    0x8863  /* pppoe discovery packets     */
  182 #define ETHERTYPE_PPPOE_SESS    0x8864  /* pppoe session packets       */
  183 #define ETHERTYPE_PPPOE_STUPID_DISC 0x3c12 /* pppoe discovery packets 3com? */
  184 #define ETHERTYPE_PPPOE_STUPID_SESS 0x3c13 /* pppoe session packets   3com? */
  185 #else
  186 #define PTT_EOL         (0x0000)
  187 #define PTT_SRV_NAME    (0x0101)
  188 #define PTT_AC_NAME     (0x0201)
  189 #define PTT_HOST_UNIQ   (0x0301)
  190 #define PTT_AC_COOKIE   (0x0401)
  191 #define PTT_VENDOR      (0x0501)
  192 #define PTT_RELAY_SID   (0x1001)
  193 #define PTT_SRV_ERR     (0x0102)
  194 #define PTT_SYS_ERR     (0x0202)
  195 #define PTT_GEN_ERR     (0x0302)
  196 
  197 #define ETHERTYPE_PPPOE_DISC    0x6388  /* pppoe discovery packets     */
  198 #define ETHERTYPE_PPPOE_SESS    0x6488  /* pppoe session packets       */
  199 #define ETHERTYPE_PPPOE_STUPID_DISC 0x123c /* pppoe discovery packets 3com? */
  200 #define ETHERTYPE_PPPOE_STUPID_SESS 0x133c /* pppoe session packets   3com? */
  201 #endif
  202 
  203 struct pppoe_tag {
  204         u_int16_t tag_type;
  205         u_int16_t tag_len;
  206         char tag_data[0];
  207 }__packed;
  208 
  209 struct pppoe_hdr{
  210         u_int8_t ver:4;
  211         u_int8_t type:4;
  212         u_int8_t code;
  213         u_int16_t sid;
  214         u_int16_t length;
  215         struct pppoe_tag tag[0];
  216 }__packed;
  217 
  218 
  219 struct pppoe_full_hdr {
  220         struct  ether_header eh;
  221         struct pppoe_hdr ph;
  222 }__packed;
  223 
  224 union   packet {
  225         struct pppoe_full_hdr   pkt_header;
  226         u_int8_t        bytes[2048];
  227 };
  228 
  229 struct datatag {
  230         struct pppoe_tag hdr;
  231         u_int8_t        data[PPPOE_SERVICE_NAME_SIZE];
  232 };     
  233 
  234 
  235 /*
  236  * Define the order in which we will place tags in packets
  237  * this may be ignored
  238  */
  239 /* for PADI */
  240 #define TAGI_SVC 0
  241 #define TAGI_HUNIQ 1
  242 /* for PADO */
  243 #define TAGO_ACNAME 0
  244 #define TAGO_SVC 1
  245 #define TAGO_COOKIE 2
  246 #define TAGO_HUNIQ 3
  247 /* for PADR */
  248 #define TAGR_SVC 0
  249 #define TAGR_HUNIQ 1
  250 #define TAGR_COOKIE 2
  251 /* for PADS */
  252 #define TAGS_ACNAME 0
  253 #define TAGS_SVC 1
  254 #define TAGS_COOKIE 2
  255 #define TAGS_HUNIQ 3
  256 /* for PADT */
  257 
  258 #endif /* _NETGRAPH_NG_PPPOE_H_ */
  259 

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