a594f9453b
reordered in transit instead of dropping them altogether. It uses sequence numbers of PPtPGRE packets. A set of new sysctl(8) added to control this ability or disable it: net.graph.pptpgre.reorder_max (1) defines maximum length of node's private reorder queue used to keep data waiting for late packets. Zero value disables reordering. Default value 1 allows the node to restore the order for two packets swapped in transit. Greater values allow the node to deliver packets being late after more packets in sequence at cost of increased kernel memory usage. net.graph.pptpgre.reorder_timeout (1) defines time value in miliseconds used to wait for late packets. It may be useful to increase this if reordering spot is distant. MFC after: 1 month
142 lines
6.0 KiB
C
142 lines
6.0 KiB
C
/*
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* ng_pptpgre.h
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*/
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/*-
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* Copyright (c) 1999 Whistle Communications, Inc.
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* All rights reserved.
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*
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* Subject to the following obligations and disclaimer of warranty, use and
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* redistribution of this software, in source or object code forms, with or
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* without modifications are expressly permitted by Whistle Communications;
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* provided, however, that:
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* 1. Any and all reproductions of the source or object code must include the
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* copyright notice above and the following disclaimer of warranties; and
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* 2. No rights are granted, in any manner or form, to use Whistle
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* Communications, Inc. trademarks, including the mark "WHISTLE
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* COMMUNICATIONS" on advertising, endorsements, or otherwise except as
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* such appears in the above copyright notice or in the software.
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*
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* THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
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* TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
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* REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
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* INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
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* WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
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* REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
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* SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
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* IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
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* RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
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* WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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* PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* Author: Archie Cobbs <archie@freebsd.org>
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*
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* $FreeBSD$
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* $Whistle: ng_pptpgre.h,v 1.3 1999/12/08 00:11:36 archie Exp $
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*/
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#ifndef _NETGRAPH_NG_PPTPGRE_H_
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#define _NETGRAPH_NG_PPTPGRE_H_
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/* Node type name and magic cookie */
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#define NG_PPTPGRE_NODE_TYPE "pptpgre"
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#define NGM_PPTPGRE_COOKIE 1082548365
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/* Hook names */
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#define NG_PPTPGRE_HOOK_UPPER "upper" /* to upper layers */
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#define NG_PPTPGRE_HOOK_LOWER "lower" /* to lower layers */
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/* Session hooks: prefix plus hex session ID, e.g., "session_3e14" */
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#define NG_PPTPGRE_HOOK_SESSION_P "session_"
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#define NG_PPTPGRE_HOOK_SESSION_F "session_%04x"
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/* Configuration for a session */
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struct ng_pptpgre_conf {
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u_char enabled; /* enables traffic flow */
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u_char enableDelayedAck;/* enables delayed acks */
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u_char enableAlwaysAck;/* always include ack with data */
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u_char enableWindowing;/* enable windowing algorithm */
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u_int16_t cid; /* my call id */
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u_int16_t peerCid; /* peer call id */
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u_int16_t recvWin; /* peer recv window size */
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u_int16_t peerPpd; /* peer packet processing delay
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(in units of 1/10 of a second) */
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};
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/* Keep this in sync with the above structure definition */
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#define NG_PPTPGRE_CONF_TYPE_INFO { \
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{ "enabled", &ng_parse_uint8_type }, \
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{ "enableDelayedAck", &ng_parse_uint8_type }, \
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{ "enableAlwaysAck", &ng_parse_uint8_type }, \
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{ "enableWindowing", &ng_parse_uint8_type }, \
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{ "cid", &ng_parse_hint16_type }, \
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{ "peerCid", &ng_parse_hint16_type }, \
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{ "recvWin", &ng_parse_uint16_type }, \
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{ "peerPpd", &ng_parse_uint16_type }, \
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{ NULL } \
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}
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/* Statistics struct */
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struct ng_pptpgre_stats {
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u_int32_t xmitPackets; /* number of GRE packets xmit */
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u_int32_t xmitOctets; /* number of GRE octets xmit */
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u_int32_t xmitLoneAcks; /* ack-only packets transmitted */
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u_int32_t xmitDrops; /* xmits dropped due to full window */
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u_int32_t xmitTooBig; /* xmits dropped because too big */
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u_int32_t recvPackets; /* number of GRE packets rec'd */
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u_int32_t recvOctets; /* number of GRE octets rec'd */
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u_int32_t recvRunts; /* too short packets rec'd */
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u_int32_t recvBadGRE; /* bogus packets rec'd (bad GRE hdr) */
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u_int32_t recvBadAcks; /* bogus ack's rec'd in GRE header */
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u_int32_t recvBadCID; /* pkts with unknown call ID rec'd */
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u_int32_t recvOutOfOrder; /* packets rec'd out of order */
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u_int32_t recvDuplicates; /* packets rec'd with duplicate seq # */
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u_int32_t recvLoneAcks; /* ack-only packets rec'd */
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u_int32_t recvAckTimeouts; /* times peer failed to ack in time */
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u_int32_t memoryFailures; /* times we couldn't allocate memory */
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u_int32_t recvReorderOverflow; /* times we dropped GRE packet
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due to overflow of reorder queue */
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u_int32_t recvReorderTimeouts; /* times we flushed reorder queue
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due to timeout */
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};
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/* Keep this in sync with the above structure definition */
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#define NG_PPTPGRE_STATS_TYPE_INFO { \
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{ "xmitPackets", &ng_parse_uint32_type }, \
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{ "xmitOctets", &ng_parse_uint32_type }, \
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{ "xmitLoneAcks", &ng_parse_uint32_type }, \
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{ "xmitDrops", &ng_parse_uint32_type }, \
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{ "xmitTooBig", &ng_parse_uint32_type }, \
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{ "recvPackets", &ng_parse_uint32_type }, \
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{ "recvOctets", &ng_parse_uint32_type }, \
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{ "recvRunts", &ng_parse_uint32_type }, \
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{ "recvBadGRE", &ng_parse_uint32_type }, \
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{ "recvBadAcks", &ng_parse_uint32_type }, \
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{ "recvBadCID", &ng_parse_uint32_type }, \
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{ "recvOutOfOrder", &ng_parse_uint32_type }, \
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{ "recvDuplicates", &ng_parse_uint32_type }, \
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{ "recvLoneAcks", &ng_parse_uint32_type }, \
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{ "recvAckTimeouts", &ng_parse_uint32_type }, \
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{ "memoryFailures", &ng_parse_uint32_type }, \
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{ "recvReorderOverflow", &ng_parse_uint32_type}, \
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{ "recvReorderTimeouts", &ng_parse_uint32_type}, \
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{ NULL } \
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}
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/* Netgraph commands */
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enum {
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NGM_PPTPGRE_SET_CONFIG = 1, /* supply a struct ng_pptpgre_conf */
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NGM_PPTPGRE_GET_CONFIG, /* returns a struct ng_pptpgre_conf */
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NGM_PPTPGRE_GET_STATS, /* returns struct ng_pptpgre_stats */
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NGM_PPTPGRE_CLR_STATS, /* clears stats */
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NGM_PPTPGRE_GETCLR_STATS, /* returns & clears stats */
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};
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#endif /* _NETGRAPH_NG_PPTPGRE_H_ */
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