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  * Copyright (c) 2001-2002 Packet Design, LLC.
    3  * All rights reserved.
    4  * 
    5  * Subject to the following obligations and disclaimer of warranty,
    6  * use and redistribution of this software, in source or object code
    7  * forms, with or without modifications are expressly permitted by
    8  * Packet Design; provided, however, that:
    9  * 
   10  *    (i)  Any and all reproductions of the source or object code
   11  *         must include the copyright notice above and the following
   12  *         disclaimer of warranties; and
   13  *    (ii) No rights are granted, in any manner or form, to use
   14  *         Packet Design trademarks, including the mark "PACKET DESIGN"
   15  *         on advertising, endorsements, or otherwise except as such
   16  *         appears in the above copyright notice or in the software.
   17  * 
   18  * THIS SOFTWARE IS BEING PROVIDED BY PACKET DESIGN "AS IS", AND
   19  * TO THE MAXIMUM EXTENT PERMITTED BY LAW, PACKET DESIGN MAKES NO
   20  * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING
   21  * THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED
   22  * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,
   23  * OR NON-INFRINGEMENT.  PACKET DESIGN DOES NOT WARRANT, GUARANTEE,
   24  * OR MAKE ANY REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS
   25  * OF THE USE OF THIS SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY,
   26  * RELIABILITY OR OTHERWISE.  IN NO EVENT SHALL PACKET DESIGN BE
   27  * LIABLE FOR ANY DAMAGES RESULTING FROM OR ARISING OUT OF ANY USE
   28  * OF THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, ANY DIRECT,
   29  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, PUNITIVE, OR CONSEQUENTIAL
   30  * DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, LOSS OF
   31  * USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY THEORY OF
   32  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   33  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
   34  * THE USE OF THIS SOFTWARE, EVEN IF PACKET DESIGN IS ADVISED OF
   35  * THE POSSIBILITY OF SUCH DAMAGE.
   36  * 
   37  * Author: Archie Cobbs <archie@freebsd.org>
   38  *
   39  * $FreeBSD: src/sys/netgraph/ng_l2tp.h,v 1.4.2.1 2005/01/31 23:26:29 imp Exp $
   40  */
   41 
   42 #ifndef _NETGRAPH_NG_L2TP_H_
   43 #define _NETGRAPH_NG_L2TP_H_
   44 
   45 /* Node type name and magic cookie */
   46 #define NG_L2TP_NODE_TYPE       "l2tp"
   47 #define NGM_L2TP_COOKIE         1091515793
   48 
   49 /* Hook names */
   50 #define NG_L2TP_HOOK_CTRL       "ctrl"          /* control channel hook */
   51 #define NG_L2TP_HOOK_LOWER      "lower"         /* hook to lower layers */
   52 
   53 /* Session hooks: prefix plus hex session ID, e.g., "session_3e14" */
   54 #define NG_L2TP_HOOK_SESSION_P  "session_"      /* session data hook (prefix) */
   55 #define NG_L2TP_HOOK_SESSION_F  "session_%04x"  /* session data hook (format) */
   56 
   57 /* Set intial sequence numbers to not yet enabled node. */
   58 struct ng_l2tp_seq_config {
   59         u_int16_t       ns;             /* sequence number to send next */
   60         u_int16_t       nr;             /* sequence number to be recved next */
   61         u_int16_t       rack;           /* last 'nr' received */
   62         u_int16_t       xack;           /* last 'nr' sent */
   63 };
   64 
   65 /* Keep this in sync with the above structure definition. */
   66 #define NG_L2TP_SEQ_CONFIG_TYPE_INFO    {                       \
   67           { "ns",               &ng_parse_uint16_type   },      \
   68           { "nr",               &ng_parse_uint16_type   },      \
   69           { NULL }                                              \
   70 }
   71 
   72 /* Configuration for a node */
   73 struct ng_l2tp_config {
   74         u_char          enabled;        /* enables traffic flow */
   75         u_char          match_id;       /* tunnel id must match 'tunnel_id' */
   76         u_int16_t       tunnel_id;      /* local tunnel id */
   77         u_int16_t       peer_id;        /* peer's tunnel id */
   78         u_int16_t       peer_win;       /* peer's max recv window size */
   79         u_int16_t       rexmit_max;     /* max retransmits before failure */
   80         u_int16_t       rexmit_max_to;  /* max delay between retransmits */
   81 };
   82 
   83 /* Keep this in sync with the above structure definition */
   84 #define NG_L2TP_CONFIG_TYPE_INFO        {                       \
   85           { "enabled",          &ng_parse_uint8_type    },      \
   86           { "match_id",         &ng_parse_uint8_type    },      \
   87           { "tunnel_id",        &ng_parse_hint16_type   },      \
   88           { "peer_id",          &ng_parse_hint16_type   },      \
   89           { "peer_win",         &ng_parse_uint16_type   },      \
   90           { "rexmit_max",       &ng_parse_uint16_type   },      \
   91           { "rexmit_max_to",    &ng_parse_uint16_type   },      \
   92           { NULL }                                              \
   93 }
   94 
   95 /* Configuration for a session hook */
   96 struct ng_l2tp_sess_config {
   97         u_int16_t       session_id;     /* local session id */
   98         u_int16_t       peer_id;        /* peer's session id */
   99         u_char          control_dseq;   /* whether we control data sequencing */
  100         u_char          enable_dseq;    /* whether to enable data sequencing */
  101         u_char          include_length; /* whether to include length field */
  102 };
  103 
  104 /* Keep this in sync with the above structure definition */
  105 #define NG_L2TP_SESS_CONFIG_TYPE_INFO   {                       \
  106           { "session_id",       &ng_parse_hint16_type   },      \
  107           { "peer_id",          &ng_parse_hint16_type   },      \
  108           { "control_dseq",     &ng_parse_uint8_type    },      \
  109           { "enable_dseq",      &ng_parse_uint8_type    },      \
  110           { "include_length",   &ng_parse_uint8_type    },      \
  111           { NULL }                                              \
  112 }
  113 
  114 /* Statistics struct */
  115 struct ng_l2tp_stats {
  116         u_int32_t xmitPackets;          /* number of packets xmit */
  117         u_int32_t xmitOctets;           /* number of octets xmit */
  118         u_int32_t xmitZLBs;             /* ack-only packets transmitted */
  119         u_int32_t xmitDrops;            /* xmits dropped due to full window */
  120         u_int32_t xmitTooBig;           /* ctrl pkts dropped because too big */
  121         u_int32_t xmitInvalid;          /* ctrl packets with no session ID */
  122         u_int32_t xmitDataTooBig;       /* data pkts dropped because too big */
  123         u_int32_t xmitRetransmits;      /* retransmitted packets */
  124         u_int32_t recvPackets;          /* number of packets rec'd */
  125         u_int32_t recvOctets;           /* number of octets rec'd */
  126         u_int32_t recvRunts;            /* too short packets rec'd */
  127         u_int32_t recvInvalid;          /* invalid packets rec'd */
  128         u_int32_t recvWrongTunnel;      /* packets rec'd with wrong tunnel id */
  129         u_int32_t recvUnknownSID;       /* pkts rec'd with unknown session id */
  130         u_int32_t recvBadAcks;          /* ctrl pkts rec'd with invalid 'nr' */
  131         u_int32_t recvOutOfOrder;       /* out of order ctrl pkts rec'd */
  132         u_int32_t recvDuplicates;       /* duplicate ctrl pkts rec'd */
  133         u_int32_t recvDataDrops;        /* dup/out of order data pkts rec'd */
  134         u_int32_t recvZLBs;             /* ack-only packets rec'd */
  135         u_int32_t memoryFailures;       /* times we couldn't allocate memory */
  136 };
  137 
  138 /* Keep this in sync with the above structure definition */
  139 #define NG_L2TP_STATS_TYPE_INFO {                       \
  140           { "xmitPackets",      &ng_parse_uint32_type   },      \
  141           { "xmitOctets",       &ng_parse_uint32_type   },      \
  142           { "xmitZLBs",         &ng_parse_uint32_type   },      \
  143           { "xmitDrops",        &ng_parse_uint32_type   },      \
  144           { "xmitTooBig",       &ng_parse_uint32_type   },      \
  145           { "xmitInvalid",      &ng_parse_uint32_type   },      \
  146           { "xmitDataTooBig",   &ng_parse_uint32_type   },      \
  147           { "xmitRetransmits",  &ng_parse_uint32_type   },      \
  148           { "recvPackets",      &ng_parse_uint32_type   },      \
  149           { "recvOctets",       &ng_parse_uint32_type   },      \
  150           { "recvRunts",        &ng_parse_uint32_type   },      \
  151           { "recvInvalid",      &ng_parse_uint32_type   },      \
  152           { "recvWrongTunnel",  &ng_parse_uint32_type   },      \
  153           { "recvUnknownSID",   &ng_parse_uint32_type   },      \
  154           { "recvBadAcks",      &ng_parse_uint32_type   },      \
  155           { "recvOutOfOrder",   &ng_parse_uint32_type   },      \
  156           { "recvDuplicates",   &ng_parse_uint32_type   },      \
  157           { "recvDataDrops",    &ng_parse_uint32_type   },      \
  158           { "recvZLBs",         &ng_parse_uint32_type   },      \
  159           { "memoryFailures",   &ng_parse_uint32_type   },      \
  160           { NULL }                                              \
  161 }
  162 
  163 /* Session statistics struct. */
  164 struct ng_l2tp_session_stats {
  165         u_int64_t xmitPackets;          /* number of packets xmit */
  166         u_int64_t xmitOctets;           /* number of octets xmit */
  167         u_int64_t recvPackets;          /* number of packets received */
  168         u_int64_t recvOctets;           /* number of octets received */
  169 };
  170 
  171 /* Keep this in sync with the above structure definition. */
  172 #define NG_L2TP_SESSION_STATS_TYPE_INFO {                       \
  173           { "xmitPackets",      &ng_parse_uint64_type   },      \
  174           { "xmitOctets",       &ng_parse_uint64_type   },      \
  175           { "recvPackets",      &ng_parse_uint64_type   },      \
  176           { "recvOctets",       &ng_parse_uint64_type   },      \
  177           { NULL }                                              \
  178 }
  179 
  180 /* Netgraph commands */
  181 enum {
  182         NGM_L2TP_SET_CONFIG = 1,        /* supply a struct ng_l2tp_config */
  183         NGM_L2TP_GET_CONFIG,            /* returns a struct ng_l2tp_config */
  184         NGM_L2TP_SET_SESS_CONFIG,       /* supply struct ng_l2tp_sess_config */
  185         NGM_L2TP_GET_SESS_CONFIG,       /* supply a session id (u_int16_t) */
  186         NGM_L2TP_GET_STATS,             /* returns struct ng_l2tp_stats */
  187         NGM_L2TP_CLR_STATS,             /* clears stats */
  188         NGM_L2TP_GETCLR_STATS,          /* returns & clears stats */
  189         NGM_L2TP_GET_SESSION_STATS,     /* returns session stats */
  190         NGM_L2TP_CLR_SESSION_STATS,     /* clears session stats */
  191         NGM_L2TP_GETCLR_SESSION_STATS,  /* returns & clears session stats */
  192         NGM_L2TP_ACK_FAILURE,           /* sent *from* node after ack timeout */
  193         NGM_L2TP_SET_SEQ                /* supply a struct ng_l2tp_seq_config */
  194 };
  195 
  196 #endif /* _NETGRAPH_NG_L2TP_H_ */

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