sys/netgraph7/ng_l2tp.h

   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 1.5 2005/01/07 01:45:39 imp Exp $
  40  * $DragonFly: src/sys/netgraph7/ng_l2tp.h,v 1.2 2008/06/26 23:05:35 dillon Exp $
  41  */
  42
  43 #ifndef _NETGRAPH_NG_L2TP_H_
  44 #define _NETGRAPH_NG_L2TP_H_
  45
  46 /* Node type name and magic cookie */
  47 #define NG_L2TP_NODE_TYPE       "l2tp"
  48 #define NGM_L2TP_COOKIE         1091515793
  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 /* Set intial sequence numbers to not yet enabled node. */
  59 struct ng_l2tp_seq_config {
  60         u_int16_t       ns;             /* sequence number to send next */
  61         u_int16_t       nr;             /* sequence number to be recved next */
  62         u_int16_t       rack;           /* last 'nr' received */
  63         u_int16_t       xack;           /* last 'nr' sent */
  64 };
  65
  66 /* Keep this in sync with the above structure definition. */
  67 #define NG_L2TP_SEQ_CONFIG_TYPE_INFO    {                       \
  68           { "ns",               &ng_parse_uint16_type   },      \
  69           { "nr",               &ng_parse_uint16_type   },      \
  70           { NULL }                                              \
  71 }
  72
  73 /* Configuration for a node */
  74 struct ng_l2tp_config {
  75         u_char          enabled;        /* enables traffic flow */
  76         u_char          match_id;       /* tunnel id must match 'tunnel_id' */
  77         u_int16_t       tunnel_id;      /* local tunnel id */
  78         u_int16_t       peer_id;        /* peer's tunnel id */
  79         u_int16_t       peer_win;       /* peer's max recv window size */
  80         u_int16_t       rexmit_max;     /* max retransmits before failure */
  81         u_int16_t       rexmit_max_to;  /* max delay between retransmits */
  82 };
  83
  84 /* Keep this in sync with the above structure definition */
  85 #define NG_L2TP_CONFIG_TYPE_INFO        {                       \
  86           { "enabled",          &ng_parse_uint8_type    },      \
  87           { "match_id",         &ng_parse_uint8_type    },      \
  88           { "tunnel_id",        &ng_parse_hint16_type   },      \
  89           { "peer_id",          &ng_parse_hint16_type   },      \
  90           { "peer_win",         &ng_parse_uint16_type   },      \
  91           { "rexmit_max",       &ng_parse_uint16_type   },      \
  92           { "rexmit_max_to",    &ng_parse_uint16_type   },      \
  93           { NULL }                                              \
  94 }
  95
  96 /* Configuration for a session hook */
  97 struct ng_l2tp_sess_config {
  98         u_int16_t       session_id;     /* local session id */
  99         u_int16_t       peer_id;        /* peer's session id */
 100         u_char          control_dseq;   /* whether we control data sequencing */
 101         u_char          enable_dseq;    /* whether to enable data sequencing */
 102         u_char          include_length; /* whether to include length field */
 103 };
 104
 105 /* Keep this in sync with the above structure definition */
 106 #define NG_L2TP_SESS_CONFIG_TYPE_INFO   {                       \
 107           { "session_id",       &ng_parse_hint16_type   },      \
 108           { "peer_id",          &ng_parse_hint16_type   },      \
 109           { "control_dseq",     &ng_parse_uint8_type    },      \
 110           { "enable_dseq",      &ng_parse_uint8_type    },      \
 111           { "include_length",   &ng_parse_uint8_type    },      \
 112           { NULL }                                              \
 113 }
 114
 115 /* Statistics struct */
 116 struct ng_l2tp_stats {
 117         u_int32_t xmitPackets;          /* number of packets xmit */
 118         u_int32_t xmitOctets;           /* number of octets xmit */
 119         u_int32_t xmitZLBs;             /* ack-only packets transmitted */
 120         u_int32_t xmitDrops;            /* xmits dropped due to full window */
 121         u_int32_t xmitTooBig;           /* ctrl pkts dropped because too big */
 122         u_int32_t xmitInvalid;          /* ctrl packets with no session ID */
 123         u_int32_t xmitDataTooBig;       /* data pkts dropped because too big */
 124         u_int32_t xmitRetransmits;      /* retransmitted packets */
 125         u_int32_t recvPackets;          /* number of packets rec'd */
 126         u_int32_t recvOctets;           /* number of octets rec'd */
 127         u_int32_t recvRunts;            /* too short packets rec'd */
 128         u_int32_t recvInvalid;          /* invalid packets rec'd */
 129         u_int32_t recvWrongTunnel;      /* packets rec'd with wrong tunnel id */
 130         u_int32_t recvUnknownSID;       /* pkts rec'd with unknown session id */
 131         u_int32_t recvBadAcks;          /* ctrl pkts rec'd with invalid 'nr' */
 132         u_int32_t recvOutOfOrder;       /* out of order ctrl pkts rec'd */
 133         u_int32_t recvDuplicates;       /* duplicate ctrl pkts rec'd */
 134         u_int32_t recvDataDrops;        /* dup/out of order data pkts rec'd */
 135         u_int32_t recvZLBs;             /* ack-only packets rec'd */
 136         u_int32_t memoryFailures;       /* times we couldn't allocate memory */
 137 };
 138
 139 /* Keep this in sync with the above structure definition */
 140 #define NG_L2TP_STATS_TYPE_INFO {                       \
 141           { "xmitPackets",      &ng_parse_uint32_type   },      \
 142           { "xmitOctets",       &ng_parse_uint32_type   },      \
 143           { "xmitZLBs",         &ng_parse_uint32_type   },      \
 144           { "xmitDrops",        &ng_parse_uint32_type   },      \
 145           { "xmitTooBig",       &ng_parse_uint32_type   },      \
 146           { "xmitInvalid",      &ng_parse_uint32_type   },      \
 147           { "xmitDataTooBig",   &ng_parse_uint32_type   },      \
 148           { "xmitRetransmits",  &ng_parse_uint32_type   },      \
 149           { "recvPackets",      &ng_parse_uint32_type   },      \
 150           { "recvOctets",       &ng_parse_uint32_type   },      \
 151           { "recvRunts",        &ng_parse_uint32_type   },      \
 152           { "recvInvalid",      &ng_parse_uint32_type   },      \
 153           { "recvWrongTunnel",  &ng_parse_uint32_type   },      \
 154           { "recvUnknownSID",   &ng_parse_uint32_type   },      \
 155           { "recvBadAcks",      &ng_parse_uint32_type   },      \
 156           { "recvOutOfOrder",   &ng_parse_uint32_type   },      \
 157           { "recvDuplicates",   &ng_parse_uint32_type   },      \
 158           { "recvDataDrops",    &ng_parse_uint32_type   },      \
 159           { "recvZLBs",         &ng_parse_uint32_type   },      \
 160           { "memoryFailures",   &ng_parse_uint32_type   },      \
 161           { NULL }                                              \
 162 }
 163
 164 /* Session statistics struct. */
 165 struct ng_l2tp_session_stats {
 166         u_int64_t xmitPackets;          /* number of packets xmit */
 167         u_int64_t xmitOctets;           /* number of octets xmit */
 168         u_int64_t recvPackets;          /* number of packets received */
 169         u_int64_t recvOctets;           /* number of octets received */
 170 };
 171
 172 /* Keep this in sync with the above structure definition. */
 173 #define NG_L2TP_SESSION_STATS_TYPE_INFO {                       \
 174           { "xmitPackets",      &ng_parse_uint64_type   },      \
 175           { "xmitOctets",       &ng_parse_uint64_type   },      \
 176           { "recvPackets",      &ng_parse_uint64_type   },      \
 177           { "recvOctets",       &ng_parse_uint64_type   },      \
 178           { NULL }                                              \
 179 }
 180
 181 /* Netgraph commands */
 182 enum {
 183         NGM_L2TP_SET_CONFIG = 1,        /* supply a struct ng_l2tp_config */
 184         NGM_L2TP_GET_CONFIG,            /* returns a struct ng_l2tp_config */
 185         NGM_L2TP_SET_SESS_CONFIG,       /* supply struct ng_l2tp_sess_config */
 186         NGM_L2TP_GET_SESS_CONFIG,       /* supply a session id (u_int16_t) */
 187         NGM_L2TP_GET_STATS,             /* returns struct ng_l2tp_stats */
 188         NGM_L2TP_CLR_STATS,             /* clears stats */
 189         NGM_L2TP_GETCLR_STATS,          /* returns & clears stats */
 190         NGM_L2TP_GET_SESSION_STATS,     /* returns session stats */
 191         NGM_L2TP_CLR_SESSION_STATS,     /* clears session stats */
 192         NGM_L2TP_GETCLR_SESSION_STATS,  /* returns & clears session stats */
 193         NGM_L2TP_ACK_FAILURE,           /* sent *from* node after ack timeout */
 194         NGM_L2TP_SET_SEQ                /* supply a struct ng_l2tp_seq_config */
 195 };
 196
 197 #endif /* _NETGRAPH_NG_L2TP_H_ */