/*-
* Copyright (c) 2001-2002 Packet Design, LLC.
* All rights reserved.
*
* Subject to the following obligations and disclaimer of warranty,
* use and redistribution of this software, in source or object code
* forms, with or without modifications are expressly permitted by
* Packet Design; provided, however, that:
*
* (i) Any and all reproductions of the source or object code
* must include the copyright notice above and the following
* disclaimer of warranties; and
* (ii) No rights are granted, in any manner or form, to use
* Packet Design trademarks, including the mark "PACKET DESIGN"
* on advertising, endorsements, or otherwise except as such
* appears in the above copyright notice or in the software.
*
* THIS SOFTWARE IS BEING PROVIDED BY PACKET DESIGN "AS IS", AND
* TO THE MAXIMUM EXTENT PERMITTED BY LAW, PACKET DESIGN MAKES NO
* REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING
* THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED
* WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,
* OR NON-INFRINGEMENT. PACKET DESIGN DOES NOT WARRANT, GUARANTEE,
* OR MAKE ANY REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS
* OF THE USE OF THIS SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY,
* RELIABILITY OR OTHERWISE. IN NO EVENT SHALL PACKET DESIGN BE
* LIABLE FOR ANY DAMAGES RESULTING FROM OR ARISING OUT OF ANY USE
* OF THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, PUNITIVE, OR CONSEQUENTIAL
* DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, LOSS OF
* USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
* THE USE OF THIS SOFTWARE, EVEN IF PACKET DESIGN IS ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*
* Author: Archie Cobbs <archie@freebsd.org>
*/
#ifndef _NETGRAPH_NG_L2TP_H_
#define _NETGRAPH_NG_L2TP_H_
/* Node type name and magic cookie */
#define NG_L2TP_NODE_TYPE "l2tp"
#define NGM_L2TP_COOKIE 1091515793
/* Hook names */
#define NG_L2TP_HOOK_CTRL "ctrl" /* control channel hook */
#define NG_L2TP_HOOK_LOWER "lower" /* hook to lower layers */
/* Session hooks: prefix plus hex session ID, e.g., "session_3e14" */
#define NG_L2TP_HOOK_SESSION_P "session_" /* session data hook (prefix) */
#define NG_L2TP_HOOK_SESSION_F "session_%04x" /* session data hook (format) */
/* Set initial sequence numbers to not yet enabled node. */
struct ng_l2tp_seq_config {
u_int16_t ns; /* sequence number to send next */
u_int16_t nr; /* sequence number to be recved next */
u_int16_t rack; /* last 'nr' received */
u_int16_t xack; /* last 'nr' sent */
};
/* Keep this in sync with the above structure definition. */
#define NG_L2TP_SEQ_CONFIG_TYPE_INFO { \
{ "ns", &ng_parse_uint16_type }, \
{ "nr", &ng_parse_uint16_type }, \
{ NULL } \
}
/* Configuration for a node */
struct ng_l2tp_config {
u_char enabled; /* enables traffic flow */
u_char match_id; /* tunnel id must match 'tunnel_id' */
u_int16_t tunnel_id; /* local tunnel id */
u_int16_t peer_id; /* peer's tunnel id */
u_int16_t peer_win; /* peer's max recv window size */
u_int16_t rexmit_max; /* max retransmits before failure */
u_int16_t rexmit_max_to; /* max delay between retransmits */
};
/* Keep this in sync with the above structure definition */
#define NG_L2TP_CONFIG_TYPE_INFO { \
{ "enabled", &ng_parse_uint8_type }, \
{ "match_id", &ng_parse_uint8_type }, \
{ "tunnel_id", &ng_parse_hint16_type }, \
{ "peer_id", &ng_parse_hint16_type }, \
{ "peer_win", &ng_parse_uint16_type }, \
{ "rexmit_max", &ng_parse_uint16_type }, \
{ "rexmit_max_to", &ng_parse_uint16_type }, \
{ NULL } \
}
/* Configuration for a session hook */
struct ng_l2tp_sess_config {
u_int16_t session_id; /* local session id */
u_int16_t peer_id; /* peer's session id */
u_char control_dseq; /* whether we control data sequencing */
u_char enable_dseq; /* whether to enable data sequencing */
u_char include_length; /* whether to include length field */
};
/* Keep this in sync with the above structure definition */
#define NG_L2TP_SESS_CONFIG_TYPE_INFO { \
{ "session_id", &ng_parse_hint16_type }, \
{ "peer_id", &ng_parse_hint16_type }, \
{ "control_dseq", &ng_parse_uint8_type }, \
{ "enable_dseq", &ng_parse_uint8_type }, \
{ "include_length", &ng_parse_uint8_type }, \
{ NULL } \
}
/* Statistics struct */
struct ng_l2tp_stats {
u_int32_t xmitPackets; /* number of packets xmit */
u_int32_t xmitOctets; /* number of octets xmit */
u_int32_t xmitZLBs; /* ack-only packets transmitted */
u_int32_t xmitDrops; /* xmits dropped due to full window */
u_int32_t xmitTooBig; /* ctrl pkts dropped because too big */
u_int32_t xmitInvalid; /* ctrl packets with no session ID */
u_int32_t xmitDataTooBig; /* data pkts dropped because too big */
u_int32_t xmitRetransmits; /* retransmitted packets */
u_int32_t recvPackets; /* number of packets rec'd */
u_int32_t recvOctets; /* number of octets rec'd */
u_int32_t recvRunts; /* too short packets rec'd */
u_int32_t recvInvalid; /* invalid packets rec'd */
u_int32_t recvWrongTunnel; /* packets rec'd with wrong tunnel id */
u_int32_t recvUnknownSID; /* pkts rec'd with unknown session id */
u_int32_t recvBadAcks; /* ctrl pkts rec'd with invalid 'nr' */
u_int32_t recvOutOfOrder; /* out of order ctrl pkts rec'd */
u_int32_t recvDuplicates; /* duplicate ctrl pkts rec'd */
u_int32_t recvDataDrops; /* dup/out of order data pkts rec'd */
u_int32_t recvZLBs; /* ack-only packets rec'd */
u_int32_t memoryFailures; /* times we couldn't allocate memory */
};
/* Keep this in sync with the above structure definition */
#define NG_L2TP_STATS_TYPE_INFO { \
{ "xmitPackets", &ng_parse_uint32_type }, \
{ "xmitOctets", &ng_parse_uint32_type }, \
{ "xmitZLBs", &ng_parse_uint32_type }, \
{ "xmitDrops", &ng_parse_uint32_type }, \
{ "xmitTooBig", &ng_parse_uint32_type }, \
{ "xmitInvalid", &ng_parse_uint32_type }, \
{ "xmitDataTooBig", &ng_parse_uint32_type }, \
{ "xmitRetransmits", &ng_parse_uint32_type }, \
{ "recvPackets", &ng_parse_uint32_type }, \
{ "recvOctets", &ng_parse_uint32_type }, \
{ "recvRunts", &ng_parse_uint32_type }, \
{ "recvInvalid", &ng_parse_uint32_type }, \
{ "recvWrongTunnel", &ng_parse_uint32_type }, \
{ "recvUnknownSID", &ng_parse_uint32_type }, \
{ "recvBadAcks", &ng_parse_uint32_type }, \
{ "recvOutOfOrder", &ng_parse_uint32_type }, \
{ "recvDuplicates", &ng_parse_uint32_type }, \
{ "recvDataDrops", &ng_parse_uint32_type }, \
{ "recvZLBs", &ng_parse_uint32_type }, \
{ "memoryFailures", &ng_parse_uint32_type }, \
{ NULL } \
}
/* Session statistics struct. */
struct ng_l2tp_session_stats {
u_int64_t xmitPackets; /* number of packets xmit */
u_int64_t xmitOctets; /* number of octets xmit */
u_int64_t recvPackets; /* number of packets received */
u_int64_t recvOctets; /* number of octets received */
};
/* Keep this in sync with the above structure definition. */
#define NG_L2TP_SESSION_STATS_TYPE_INFO { \
{ "xmitPackets", &ng_parse_uint64_type }, \
{ "xmitOctets", &ng_parse_uint64_type }, \
{ "recvPackets", &ng_parse_uint64_type }, \
{ "recvOctets", &ng_parse_uint64_type }, \
{ NULL } \
}
/* Netgraph commands */
enum {
NGM_L2TP_SET_CONFIG = 1, /* supply a struct ng_l2tp_config */
NGM_L2TP_GET_CONFIG, /* returns a struct ng_l2tp_config */
NGM_L2TP_SET_SESS_CONFIG, /* supply struct ng_l2tp_sess_config */
NGM_L2TP_GET_SESS_CONFIG, /* supply a session id (u_int16_t) */
NGM_L2TP_GET_STATS, /* returns struct ng_l2tp_stats */
NGM_L2TP_CLR_STATS, /* clears stats */
NGM_L2TP_GETCLR_STATS, /* returns & clears stats */
NGM_L2TP_GET_SESSION_STATS, /* returns session stats */
NGM_L2TP_CLR_SESSION_STATS, /* clears session stats */
NGM_L2TP_GETCLR_SESSION_STATS, /* returns & clears session stats */
NGM_L2TP_ACK_FAILURE, /* sent *from* node after ack timeout */
NGM_L2TP_SET_SEQ /* supply a struct ng_l2tp_seq_config */
};
#endif /* _NETGRAPH_NG_L2TP_H_ */
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