129353b81c
It means, that node listens to flow control messages from downstreams and removes link from list of active links whenever a LINK_IS_DOWN message is received. If LINK_IS_UP message is received, then links is put back into list of active links. Approved by: julian (mentor), implicitly MFC after: 1 week
113 lines
4.5 KiB
C
113 lines
4.5 KiB
C
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/*
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* ng_one2many.h
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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_ONE2MANY_H_
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#define _NETGRAPH_NG_ONE2MANY_H_
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/* Node type name and magic cookie */
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#define NG_ONE2MANY_NODE_TYPE "one2many"
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#define NGM_ONE2MANY_COOKIE 1100897444
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/* Hook names */
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#define NG_ONE2MANY_HOOK_ONE "one"
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#define NG_ONE2MANY_HOOK_MANY_PREFIX "many" /* append decimal integer */
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#define NG_ONE2MANY_HOOK_MANY_FMT "many%d" /* for use with printf(3) */
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/* Maximum number of supported "many" links */
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#define NG_ONE2MANY_MAX_LINKS 64
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/* Link number used to indicate the "one" hook */
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#define NG_ONE2MANY_ONE_LINKNUM (-1)
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/* Algorithms for outgoing packet distribution (XXX only one so far) */
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#define NG_ONE2MANY_XMIT_ROUNDROBIN 1 /* round-robin delivery */
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#define NG_ONE2MANY_XMIT_ALL 2 /* send packets to all many hooks */
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/* Algorithms for detecting link failure (XXX only one so far) */
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#define NG_ONE2MANY_FAIL_MANUAL 1 /* use enabledLinks[] array */
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#define NG_ONE2MANY_FAIL_NOTIFY 2 /* listen to flow control msgs */
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/* Node configuration structure */
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struct ng_one2many_config {
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u_int32_t xmitAlg; /* how to distribute packets */
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u_int32_t failAlg; /* how to detect link failure */
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u_char enabledLinks[NG_ONE2MANY_MAX_LINKS];
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};
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/* Keep this in sync with the above structure definition */
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#define NG_ONE2MANY_CONFIG_TYPE_INFO(atype) { \
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{ "xmitAlg", &ng_parse_uint32_type }, \
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{ "failAlg", &ng_parse_uint32_type }, \
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{ "enabledLinks", (atype) }, \
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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_one2many_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 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 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_ONE2MANY_LINK_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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{ "xmitOctets", &ng_parse_uint64_type }, \
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{ "xmitPackets", &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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/* Netgraph control messages */
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enum {
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NGM_ONE2MANY_SET_CONFIG, /* set configuration */
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NGM_ONE2MANY_GET_CONFIG, /* get configuration */
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NGM_ONE2MANY_GET_STATS, /* get link stats */
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NGM_ONE2MANY_CLR_STATS, /* clear link stats */
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NGM_ONE2MANY_GETCLR_STATS, /* atomically get & clear link stats */
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};
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#endif /* _NETGRAPH_NG_ONE2MANY_H_ */
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