The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/netgraph/ng_one2many.h

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    1 
    2 /*
    3  * ng_one2many.h
    4  *
    5  * Copyright (c) 2000 Whistle Communications, Inc.
    6  * All rights reserved.
    7  * 
    8  * Subject to the following obligations and disclaimer of warranty, use and
    9  * redistribution of this software, in source or object code forms, with or
   10  * without modifications are expressly permitted by Whistle Communications;
   11  * provided, however, that:
   12  * 1. Any and all reproductions of the source or object code must include the
   13  *    copyright notice above and the following disclaimer of warranties; and
   14  * 2. No rights are granted, in any manner or form, to use Whistle
   15  *    Communications, Inc. trademarks, including the mark "WHISTLE
   16  *    COMMUNICATIONS" on advertising, endorsements, or otherwise except as
   17  *    such appears in the above copyright notice or in the software.
   18  * 
   19  * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
   20  * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
   21  * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
   22  * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
   23  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
   24  * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
   25  * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
   26  * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
   27  * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
   28  * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
   29  * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
   30  * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
   31  * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
   32  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   33  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   34  * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
   35  * OF SUCH DAMAGE.
   36  *
   37  * Author: Archie Cobbs <archie@freebsd.org>
   38  *
   39  * $FreeBSD: releng/5.2/sys/netgraph/ng_one2many.h 97685 2002-05-31 23:48:03Z archie $
   40  */
   41 
   42 #ifndef _NETGRAPH_NG_ONE2MANY_H_
   43 #define _NETGRAPH_NG_ONE2MANY_H_
   44 
   45 /* Node type name and magic cookie */
   46 #define NG_ONE2MANY_NODE_TYPE           "one2many"
   47 #define NGM_ONE2MANY_COOKIE             971111383
   48 
   49 /* Hook names */
   50 #define NG_ONE2MANY_HOOK_ONE            "one"
   51 #define NG_ONE2MANY_HOOK_MANY_PREFIX    "many"   /* append decimal integer */
   52 #define NG_ONE2MANY_HOOK_MANY_FMT       "many%d" /* for use with printf(3) */
   53 
   54 /* Maximum number of supported "many" links */
   55 #define NG_ONE2MANY_MAX_LINKS           64
   56 
   57 /* Link number used to indicate the "one" hook */
   58 #define NG_ONE2MANY_ONE_LINKNUM         (-1)
   59 
   60 /* Algorithms for outgoing packet distribution (XXX only one so far) */
   61 #define NG_ONE2MANY_XMIT_ROUNDROBIN     1       /* round-robin delivery */
   62 #define NG_ONE2MANY_XMIT_ALL            2       /* send packets to all many hooks */
   63 
   64 /* Algorithms for detecting link failure (XXX only one so far) */
   65 #define NG_ONE2MANY_FAIL_MANUAL         1       /* use enabledLinks[] array */
   66 
   67 /* Node configuration structure */
   68 struct ng_one2many_config {
   69         u_int32_t       xmitAlg;                /* how to distribute packets */
   70         u_int32_t       failAlg;                /* how to detect link failure */
   71         u_char          enabledLinks[NG_ONE2MANY_MAX_LINKS];
   72 };
   73 
   74 /* Keep this in sync with the above structure definition */
   75 #define NG_ONE2MANY_CONFIG_TYPE_INFO(atype)     {               \
   76           { "xmitAlg",          &ng_parse_uint32_type   },      \
   77           { "failAlg",          &ng_parse_uint32_type   },      \
   78           { "enabledLinks",     (atype)                 },      \
   79           { NULL }                                              \
   80 }
   81 
   82 /* Statistics structure (one for each link) */
   83 struct ng_one2many_link_stats {
   84         u_int64_t       recvOctets;     /* total octets rec'd on link */
   85         u_int64_t       recvPackets;    /* total pkts rec'd on link */
   86         u_int64_t       xmitOctets;     /* total octets xmit'd on link */
   87         u_int64_t       xmitPackets;    /* total pkts xmit'd on link */
   88         u_int64_t       memoryFailures; /* times couldn't get mem or mbuf */
   89 };
   90 
   91 /* Keep this in sync with the above structure definition */
   92 #define NG_ONE2MANY_LINK_STATS_TYPE_INFO        {               \
   93           { "recvOctets",       &ng_parse_uint64_type   },      \
   94           { "recvPackets",      &ng_parse_uint64_type   },      \
   95           { "xmitOctets",       &ng_parse_uint64_type   },      \
   96           { "xmitPackets",      &ng_parse_uint64_type   },      \
   97           { "memoryFailures",   &ng_parse_uint64_type   },      \
   98           { NULL }                                              \
   99 }
  100 
  101 /* Netgraph control messages */
  102 enum {
  103         NGM_ONE2MANY_SET_CONFIG,        /* set configuration */
  104         NGM_ONE2MANY_GET_CONFIG,        /* get configuration */
  105         NGM_ONE2MANY_GET_STATS,         /* get link stats */
  106         NGM_ONE2MANY_CLR_STATS,         /* clear link stats */
  107         NGM_ONE2MANY_GETCLR_STATS,      /* atomically get & clear link stats */
  108 };
  109 
  110 #endif /* _NETGRAPH_NG_ONE2MANY_H_ */
  111 

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