f961caf218
The ng_bridge(4) node is designed to work in moderately small environments. Connecting such a node to a larger network rapidly fills the MAC table for no reason. It even become complicated to obtain data from the gettable message, because the result is too large to transmit. This patch introduces, two new functionality bits on the hooks: - Allow or disallow MAC address learning for incoming patckets. - Allow or disallow sending unknown MACs through this hook. Uplinks are characterized by denied learing while sending out unknowns. Normal links are charaterized by allowed learning and sending out unknowns. Reviewed by: kp Approved by: kp (mentor) MFC after: 2 weeks Differential Revision: https://reviews.freebsd.org/D23963
206 lines
7.7 KiB
C
206 lines
7.7 KiB
C
/*
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* ng_bridge.h
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*/
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/*-
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* Copyright (c) 2000 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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*/
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#ifndef _NETGRAPH_NG_BRIDGE_H_
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#define _NETGRAPH_NG_BRIDGE_H_
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/*
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* Support the older ABI based on fixed size tables.
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* ABI is deprecated, to be removed in releases > 12
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* Please note: There is no API support!
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* You canno create new messages using the old API but messages conforming the
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* old ABI are understood.
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*/
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#define NGM_BRIDGE_TABLE_ABI
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/* Node type name and magic cookie */
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#define NG_BRIDGE_NODE_TYPE "bridge"
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#define NGM_BRIDGE_COOKIE 1569321993
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#ifdef NGM_BRIDGE_TABLE_ABI
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#define NGM_BRIDGE_COOKIE_TBL 967239368
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#define NG_BRIDGE_MAX_LINKS 32
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#endif /* NGM_BRIDGE_TABLE_ABI */
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/* Hook names */
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#define NG_BRIDGE_HOOK_LINK_PREFIX "link" /* append decimal integer */
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#define NG_BRIDGE_HOOK_LINK_FMT "link%d" /* for use with printf(3) */
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#define NG_BRIDGE_HOOK_UPLINK_PREFIX "uplink" /* append decimal integer */
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#define NG_BRIDGE_HOOK_UPLINK_FMT "uplink%d" /* for use with printf(3) */
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/* Node configuration structure */
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struct ng_bridge_config {
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u_char debugLevel; /* debug level */
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u_int32_t loopTimeout; /* link loopback mute time */
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u_int32_t maxStaleness; /* max host age before nuking */
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u_int32_t minStableAge; /* min time for a stable host */
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};
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#ifdef NGM_BRIDGE_TABLE_ABI
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struct ng_bridge_config_tbl {
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u_char ipfw[NG_BRIDGE_MAX_LINKS];
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struct ng_bridge_config cfg;
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};
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#endif /* NGM_BRIDGE_TABLE_ABI */
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/* Keep this in sync with the above structure definition */
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#define NG_BRIDGE_CONFIG_TYPE_INFO { \
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{ "debugLevel", &ng_parse_uint8_type }, \
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{ "loopTimeout", &ng_parse_uint32_type }, \
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{ "maxStaleness", &ng_parse_uint32_type }, \
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{ "minStableAge", &ng_parse_uint32_type }, \
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{ NULL } \
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}
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/* Statistics structure (one for each link) */
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struct ng_bridge_link_stats {
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u_int64_t recvOctets; /* total octets rec'd on link */
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u_int64_t recvPackets; /* total pkts rec'd on link */
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u_int64_t recvMulticasts; /* multicast pkts rec'd on link */
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u_int64_t recvBroadcasts; /* broadcast pkts rec'd on link */
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u_int64_t recvUnknown; /* pkts rec'd with unknown dest addr */
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u_int64_t recvRunts; /* pkts rec'd less than 14 bytes */
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u_int64_t recvInvalid; /* pkts rec'd with bogus source addr */
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u_int64_t xmitOctets; /* total octets xmit'd on link */
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u_int64_t xmitPackets; /* total pkts xmit'd on link */
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u_int64_t xmitMulticasts; /* multicast pkts xmit'd on link */
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u_int64_t xmitBroadcasts; /* broadcast pkts xmit'd on link */
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u_int64_t loopDrops; /* pkts dropped due to loopback */
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u_int64_t loopDetects; /* number of loop detections */
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u_int64_t memoryFailures; /* times couldn't get mem or mbuf */
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};
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/* Keep this in sync with the above structure definition */
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#define NG_BRIDGE_STATS_TYPE_INFO { \
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{ "recvOctets", &ng_parse_uint64_type }, \
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{ "recvPackets", &ng_parse_uint64_type }, \
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{ "recvMulticast", &ng_parse_uint64_type }, \
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{ "recvBroadcast", &ng_parse_uint64_type }, \
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{ "recvUnknown", &ng_parse_uint64_type }, \
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{ "recvRunts", &ng_parse_uint64_type }, \
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{ "recvInvalid", &ng_parse_uint64_type }, \
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{ "xmitOctets", &ng_parse_uint64_type }, \
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{ "xmitPackets", &ng_parse_uint64_type }, \
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{ "xmitMulticasts", &ng_parse_uint64_type }, \
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{ "xmitBroadcasts", &ng_parse_uint64_type }, \
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{ "loopDrops", &ng_parse_uint64_type }, \
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{ "loopDetects", &ng_parse_uint64_type }, \
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{ "memoryFailures", &ng_parse_uint64_type }, \
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{ NULL } \
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}
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struct ng_bridge_link;
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typedef struct ng_bridge_link *link_p;
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/* Structure describing a single host */
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struct ng_bridge_host {
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u_char addr[6]; /* ethernet address */
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link_p link; /* link where addr can be found */
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u_int16_t age; /* seconds ago entry was created */
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u_int16_t staleness; /* seconds ago host last heard from */
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};
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#ifdef NGM_BRIDGE_TABLE_ABI
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struct ng_bridge_host_tbl {
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u_char addr[6]; /* ethernet address */
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u_int16_t linkNum; /* link where addr can be found */
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u_int16_t age; /* seconds ago entry was created */
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u_int16_t staleness; /* seconds ago host last heard from */
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};
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#endif /* NGM_BRIDGE_TABLE_ABI */
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/* external representation of the host */
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struct ng_bridge_hostent {
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u_char addr[6]; /* ethernet address */
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char hook[NG_HOOKSIZ]; /* link where addr can be found */
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u_int16_t age; /* seconds ago entry was created */
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u_int16_t staleness; /* seconds ago host last heard from */
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};
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/* Keep this in sync with the above structure definition */
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#define NG_BRIDGE_HOST_TYPE_INFO(entype) { \
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{ "addr", (entype) }, \
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{ "hook", &ng_parse_hookbuf_type }, \
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{ "age", &ng_parse_uint16_type }, \
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{ "staleness", &ng_parse_uint16_type }, \
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{ NULL } \
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}
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/* Structure returned by NGM_BRIDGE_GET_TABLE */
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struct ng_bridge_host_ary {
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u_int32_t numHosts;
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struct ng_bridge_hostent hosts[];
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};
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/* Keep this in sync with the above structure definition */
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#define NG_BRIDGE_HOST_ARY_TYPE_INFO(harytype) { \
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{ "numHosts", &ng_parse_uint32_type }, \
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{ "hosts", (harytype) }, \
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{ NULL } \
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}
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#ifdef NGM_BRIDGE_TABLE_ABI
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struct ng_bridge_hostent_tbl {
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u_char addr[6]; /* ethernet address */
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u_int16_t linkNum; /* link where addr can be found */
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u_int16_t age; /* seconds ago entry was created */
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u_int16_t staleness; /* seconds ago host last heard from */
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};
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struct ng_bridge_host_tbl_ary {
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u_int32_t numHosts;
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struct ng_bridge_hostent_tbl hosts[];
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};
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#endif /* NGM_BRIDGE_TABLE_ABI */
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/* Netgraph control messages */
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enum {
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NGM_BRIDGE_SET_CONFIG = 1, /* set node configuration */
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NGM_BRIDGE_GET_CONFIG, /* get node configuration */
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NGM_BRIDGE_RESET, /* reset (forget) all information */
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NGM_BRIDGE_GET_STATS, /* get link stats */
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NGM_BRIDGE_CLR_STATS, /* clear link stats */
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NGM_BRIDGE_GETCLR_STATS, /* atomically get & clear link stats */
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NGM_BRIDGE_GET_TABLE, /* get link table */
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NGM_BRIDGE_SET_PERSISTENT, /* set persistent mode */
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};
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#endif /* _NETGRAPH_NG_BRIDGE_H_ */
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