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_l2tp.h

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    1 
    2 /*
    3  * Copyright (c) 2001-2002 Packet Design, LLC.
    4  * All rights reserved.
    5  * 
    6  * Subject to the following obligations and disclaimer of warranty,
    7  * use and redistribution of this software, in source or object code
    8  * forms, with or without modifications are expressly permitted by
    9  * Packet Design; provided, however, that:
   10  * 
   11  *    (i)  Any and all reproductions of the source or object code
   12  *         must include the copyright notice above and the following
   13  *         disclaimer of warranties; and
   14  *    (ii) No rights are granted, in any manner or form, to use
   15  *         Packet Design trademarks, including the mark "PACKET DESIGN"
   16  *         on advertising, endorsements, or otherwise except as such
   17  *         appears in the above copyright notice or in the software.
   18  * 
   19  * THIS SOFTWARE IS BEING PROVIDED BY PACKET DESIGN "AS IS", AND
   20  * TO THE MAXIMUM EXTENT PERMITTED BY LAW, PACKET DESIGN MAKES NO
   21  * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING
   22  * THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED
   23  * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,
   24  * OR NON-INFRINGEMENT.  PACKET DESIGN DOES NOT WARRANT, GUARANTEE,
   25  * OR MAKE ANY REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS
   26  * OF THE USE OF THIS SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY,
   27  * RELIABILITY OR OTHERWISE.  IN NO EVENT SHALL PACKET DESIGN BE
   28  * LIABLE FOR ANY DAMAGES RESULTING FROM OR ARISING OUT OF ANY USE
   29  * OF THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, ANY DIRECT,
   30  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, PUNITIVE, OR CONSEQUENTIAL
   31  * DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, LOSS OF
   32  * USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY THEORY OF
   33  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   34  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
   35  * THE USE OF THIS SOFTWARE, EVEN IF PACKET DESIGN IS ADVISED OF
   36  * THE POSSIBILITY OF SUCH DAMAGE.
   37  * 
   38  * Author: Archie Cobbs <archie@freebsd.org>
   39  *
   40  * $FreeBSD: stable/4/sys/netgraph/ng_l2tp.h 102201 2002-08-20 23:48:53Z archie $
   41  */
   42 
   43 #ifndef _NETGRAPH_L2TP_H_
   44 #define _NETGRAPH_L2TP_H_
   45 
   46 /* Node type name and magic cookie */
   47 #define NG_L2TP_NODE_TYPE       "l2tp"
   48 #define NGM_L2TP_COOKIE         1011392401
   49 
   50 /* Hook names */
   51 #define NG_L2TP_HOOK_CTRL       "ctrl"          /* control channel hook */
   52 #define NG_L2TP_HOOK_LOWER      "lower"         /* hook to lower layers */
   53 
   54 /* Session hooks: prefix plus hex session ID, e.g., "session_3e14" */
   55 #define NG_L2TP_HOOK_SESSION_P  "session_"      /* session data hook (prefix) */
   56 #define NG_L2TP_HOOK_SESSION_F  "session_%04x"  /* session data hook (format) */
   57 
   58 /* Configuration for a node */
   59 struct ng_l2tp_config {
   60         u_char          enabled;        /* enables traffic flow */
   61         u_char          match_id;       /* tunnel id must match 'tunnel_id' */
   62         u_int16_t       tunnel_id;      /* local tunnel id */
   63         u_int16_t       peer_id;        /* peer's tunnel id */
   64         u_int16_t       peer_win;       /* peer's max recv window size */
   65         u_int16_t       rexmit_max;     /* max retransmits before failure */
   66         u_int16_t       rexmit_max_to;  /* max delay between retransmits */
   67 };
   68 
   69 /* Keep this in sync with the above structure definition */
   70 #define NG_L2TP_CONFIG_TYPE_INFO        {                       \
   71           { "enabled",          &ng_parse_uint8_type    },      \
   72           { "match_id",         &ng_parse_uint8_type    },      \
   73           { "tunnel_id",        &ng_parse_hint16_type   },      \
   74           { "peer_id",          &ng_parse_hint16_type   },      \
   75           { "peer_win",         &ng_parse_uint16_type   },      \
   76           { "rexmit_max",       &ng_parse_uint16_type   },      \
   77           { "rexmit_max_to",    &ng_parse_uint16_type   },      \
   78           { NULL }                                              \
   79 }
   80 
   81 /* Configuration for a session hook */
   82 struct ng_l2tp_sess_config {
   83         u_int16_t       session_id;     /* local session id */
   84         u_int16_t       peer_id;        /* peer's session id */
   85         u_char          control_dseq;   /* whether we control data sequencing */
   86         u_char          enable_dseq;    /* whether to enable data sequencing */
   87         u_char          include_length; /* whether to include length field */
   88 };
   89 
   90 /* Keep this in sync with the above structure definition */
   91 #define NG_L2TP_SESS_CONFIG_TYPE_INFO   {                       \
   92           { "session_id",       &ng_parse_hint16_type   },      \
   93           { "peer_id",          &ng_parse_hint16_type   },      \
   94           { "control_dseq",     &ng_parse_uint8_type    },      \
   95           { "enable_dseq",      &ng_parse_uint8_type    },      \
   96           { "include_length",   &ng_parse_uint8_type    },      \
   97           { NULL }                                              \
   98 }
   99 
  100 /* Statistics struct */
  101 struct ng_l2tp_stats {
  102         u_int32_t xmitPackets;          /* number of packets xmit */
  103         u_int32_t xmitOctets;           /* number of octets xmit */
  104         u_int32_t xmitZLBs;             /* ack-only packets transmitted */
  105         u_int32_t xmitDrops;            /* xmits dropped due to full window */
  106         u_int32_t xmitTooBig;           /* ctrl pkts dropped because too big */
  107         u_int32_t xmitInvalid;          /* ctrl packets with no session ID */
  108         u_int32_t xmitDataTooBig;       /* data pkts dropped because too big */
  109         u_int32_t xmitRetransmits;      /* retransmitted packets */
  110         u_int32_t recvPackets;          /* number of packets rec'd */
  111         u_int32_t recvOctets;           /* number of octets rec'd */
  112         u_int32_t recvRunts;            /* too short packets rec'd */
  113         u_int32_t recvInvalid;          /* invalid packets rec'd */
  114         u_int32_t recvWrongTunnel;      /* packets rec'd with wrong tunnel id */
  115         u_int32_t recvUnknownSID;       /* pkts rec'd with unknown session id */
  116         u_int32_t recvBadAcks;          /* ctrl pkts rec'd with invalid 'nr' */
  117         u_int32_t recvOutOfOrder;       /* out of order ctrl pkts rec'd */
  118         u_int32_t recvDuplicates;       /* duplicate ctrl pkts rec'd */
  119         u_int32_t recvDataDrops;        /* dup/out of order data pkts rec'd */
  120         u_int32_t recvZLBs;             /* ack-only packets rec'd */
  121         u_int32_t memoryFailures;       /* times we couldn't allocate memory */
  122 };
  123 
  124 /* Keep this in sync with the above structure definition */
  125 #define NG_L2TP_STATS_TYPE_INFO {                       \
  126           { "xmitPackets",      &ng_parse_uint32_type   },      \
  127           { "xmitOctets",       &ng_parse_uint32_type   },      \
  128           { "xmitZLBs",         &ng_parse_uint32_type   },      \
  129           { "xmitDrops",        &ng_parse_uint32_type   },      \
  130           { "xmitTooBig",       &ng_parse_uint32_type   },      \
  131           { "xmitInvalid",      &ng_parse_uint32_type   },      \
  132           { "xmitDataTooBig",   &ng_parse_uint32_type   },      \
  133           { "xmitRetransmits",  &ng_parse_uint32_type   },      \
  134           { "recvPackets",      &ng_parse_uint32_type   },      \
  135           { "recvOctets",       &ng_parse_uint32_type   },      \
  136           { "recvRunts",        &ng_parse_uint32_type   },      \
  137           { "recvInvalid",      &ng_parse_uint32_type   },      \
  138           { "recvWrongTunnel",  &ng_parse_uint32_type   },      \
  139           { "recvUnknownSID",   &ng_parse_uint32_type   },      \
  140           { "recvBadAcks",      &ng_parse_uint32_type   },      \
  141           { "recvOutOfOrder",   &ng_parse_uint32_type   },      \
  142           { "recvDuplicates",   &ng_parse_uint32_type   },      \
  143           { "recvDataDrops",    &ng_parse_uint32_type   },      \
  144           { "recvZLBs",         &ng_parse_uint32_type   },      \
  145           { "memoryFailures",   &ng_parse_uint32_type   },      \
  146           { NULL }                                              \
  147 }
  148 
  149 /* Netgraph commands */
  150 enum {
  151         NGM_L2TP_SET_CONFIG = 1,        /* supply a struct ng_l2tp_config */
  152         NGM_L2TP_GET_CONFIG,            /* returns a struct ng_l2tp_config */
  153         NGM_L2TP_SET_SESS_CONFIG,       /* supply struct ng_l2tp_sess_config */
  154         NGM_L2TP_GET_SESS_CONFIG,       /* supply a session id (u_int16_t) */
  155         NGM_L2TP_GET_STATS,             /* returns struct ng_l2tp_stats */
  156         NGM_L2TP_CLR_STATS,             /* clears stats */
  157         NGM_L2TP_GETCLR_STATS,          /* returns & clears stats */
  158         NGM_L2TP_ACK_FAILURE,           /* sent *from* node after ack timeout */
  159 };
  160 
  161 #endif /* _NETGRAPH_L2TP_H_ */

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