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  * ng_one2many.h
    3  */
    4 
    5 /*-
    6  * Copyright (c) 2000 Whistle Communications, Inc.
    7  * All rights reserved.
    8  * 
    9  * Subject to the following obligations and disclaimer of warranty, use and
   10  * redistribution of this software, in source or object code forms, with or
   11  * without modifications are expressly permitted by Whistle Communications;
   12  * provided, however, that:
   13  * 1. Any and all reproductions of the source or object code must include the
   14  *    copyright notice above and the following disclaimer of warranties; and
   15  * 2. No rights are granted, in any manner or form, to use Whistle
   16  *    Communications, Inc. trademarks, including the mark "WHISTLE
   17  *    COMMUNICATIONS" on advertising, endorsements, or otherwise except as
   18  *    such appears in the above copyright notice or in the software.
   19  * 
   20  * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
   21  * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
   22  * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
   23  * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
   24  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
   25  * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
   26  * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
   27  * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
   28  * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
   29  * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
   30  * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
   31  * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
   32  * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
   33  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   34  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   35  * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
   36  * OF SUCH DAMAGE.
   37  *
   38  * Author: Archie Cobbs <archie@freebsd.org>
   39  *
   40  * $FreeBSD: releng/8.4/sys/netgraph/ng_one2many.h 219660 2011-03-15 07:15:04Z ae $
   41  */
   42 
   43 #ifndef _NETGRAPH_NG_ONE2MANY_H_
   44 #define _NETGRAPH_NG_ONE2MANY_H_
   45 
   46 /* Node type name and magic cookie */
   47 #define NG_ONE2MANY_NODE_TYPE           "one2many"
   48 #define NGM_ONE2MANY_COOKIE             1100897444
   49 
   50 /* Hook names */
   51 #define NG_ONE2MANY_HOOK_ONE            "one"
   52 #define NG_ONE2MANY_HOOK_MANY_PREFIX    "many"   /* append decimal integer */
   53 #define NG_ONE2MANY_HOOK_MANY_FMT       "many%d" /* for use with printf(3) */
   54 
   55 /* Maximum number of supported "many" links */
   56 #define NG_ONE2MANY_MAX_LINKS           64
   57 
   58 /* Link number used to indicate the "one" hook */
   59 #define NG_ONE2MANY_ONE_LINKNUM         (-1)
   60 
   61 /* Algorithms for outgoing packet distribution (XXX only one so far) */
   62 #define NG_ONE2MANY_XMIT_ROUNDROBIN     1       /* round-robin delivery */
   63 #define NG_ONE2MANY_XMIT_ALL            2       /* send packets to all many hooks */
   64 #define NG_ONE2MANY_XMIT_FAILOVER       3       /* send packets to first active "many" */
   65 
   66 /* Algorithms for detecting link failure (XXX only one so far) */
   67 #define NG_ONE2MANY_FAIL_MANUAL         1       /* use enabledLinks[] array */
   68 #define NG_ONE2MANY_FAIL_NOTIFY         2       /* listen to flow control msgs */
   69 
   70 /* Node configuration structure */
   71 struct ng_one2many_config {
   72         u_int32_t       xmitAlg;                /* how to distribute packets */
   73         u_int32_t       failAlg;                /* how to detect link failure */
   74         u_char          enabledLinks[NG_ONE2MANY_MAX_LINKS];
   75 };
   76 
   77 /* Keep this in sync with the above structure definition */
   78 #define NG_ONE2MANY_CONFIG_TYPE_INFO(atype)     {               \
   79           { "xmitAlg",          &ng_parse_uint32_type   },      \
   80           { "failAlg",          &ng_parse_uint32_type   },      \
   81           { "enabledLinks",     (atype)                 },      \
   82           { NULL }                                              \
   83 }
   84 
   85 /* Statistics structure (one for each link) */
   86 struct ng_one2many_link_stats {
   87         u_int64_t       recvOctets;     /* total octets rec'd on link */
   88         u_int64_t       recvPackets;    /* total pkts rec'd on link */
   89         u_int64_t       xmitOctets;     /* total octets xmit'd on link */
   90         u_int64_t       xmitPackets;    /* total pkts xmit'd on link */
   91         u_int64_t       memoryFailures; /* times couldn't get mem or mbuf */
   92 };
   93 
   94 /* Keep this in sync with the above structure definition */
   95 #define NG_ONE2MANY_LINK_STATS_TYPE_INFO        {               \
   96           { "recvOctets",       &ng_parse_uint64_type   },      \
   97           { "recvPackets",      &ng_parse_uint64_type   },      \
   98           { "xmitOctets",       &ng_parse_uint64_type   },      \
   99           { "xmitPackets",      &ng_parse_uint64_type   },      \
  100           { "memoryFailures",   &ng_parse_uint64_type   },      \
  101           { NULL }                                              \
  102 }
  103 
  104 /* Netgraph control messages */
  105 enum {
  106         NGM_ONE2MANY_SET_CONFIG,        /* set configuration */
  107         NGM_ONE2MANY_GET_CONFIG,        /* get configuration */
  108         NGM_ONE2MANY_GET_STATS,         /* get link stats */
  109         NGM_ONE2MANY_CLR_STATS,         /* clear link stats */
  110         NGM_ONE2MANY_GETCLR_STATS,      /* atomically get & clear link stats */
  111 };
  112 
  113 #endif /* _NETGRAPH_NG_ONE2MANY_H_ */
  114 

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