sys/netgraph/ng_bpf.h

root/sys/netgraph/ng_bpf.h
/*
 * ng_bpf.h
 */

/*-
 * Copyright (c) 1996-1999 Whistle Communications, Inc.
 * All rights reserved.
 * 
 * Subject to the following obligations and disclaimer of warranty, use and
 * redistribution of this software, in source or object code forms, with or
 * without modifications are expressly permitted by Whistle Communications;
 * provided, however, that:
 * 1. Any and all reproductions of the source or object code must include the
 *    copyright notice above and the following disclaimer of warranties; and
 * 2. No rights are granted, in any manner or form, to use Whistle
 *    Communications, Inc. trademarks, including the mark "WHISTLE
 *    COMMUNICATIONS" on advertising, endorsements, or otherwise except as
 *    such appears in the above copyright notice or in the software.
 * 
 * THIS SOFTWARE IS BEING PROVIDED BY WHISTLE COMMUNICATIONS "AS IS", AND
 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, WHISTLE COMMUNICATIONS MAKES NO
 * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING THIS SOFTWARE,
 * INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
 * WHISTLE COMMUNICATIONS DOES NOT WARRANT, GUARANTEE, OR MAKE ANY
 * REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS OF THE USE OF THIS
 * SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
 * IN NO EVENT SHALL WHISTLE COMMUNICATIONS BE LIABLE FOR ANY DAMAGES
 * RESULTING FROM OR ARISING OUT OF ANY USE OF THIS SOFTWARE, INCLUDING
 * WITHOUT LIMITATION, ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
 * PUNITIVE, OR CONSEQUENTIAL DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES, LOSS OF USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF WHISTLE COMMUNICATIONS IS ADVISED OF THE POSSIBILITY
 * OF SUCH DAMAGE.
 *
 * Author: Archie Cobbs <archie@freebsd.org>
 * $Whistle: ng_bpf.h,v 1.3 1999/12/03 20:30:23 archie Exp $
 */

#ifndef _NETGRAPH_NG_BPF_H_
#define _NETGRAPH_NG_BPF_H_

/* Node type name and magic cookie */
#define NG_BPF_NODE_TYPE        "bpf"
#define NGM_BPF_COOKIE          944100792

/* Program structure for one hook */
struct ng_bpf_hookprog {
        char            thisHook[NG_HOOKSIZ];           /* name of hook */
        char            ifMatch[NG_HOOKSIZ];            /* match dest hook */
        char            ifNotMatch[NG_HOOKSIZ];         /* !match dest hook */
        int32_t         bpf_prog_len;                   /* #insns in program */
        struct bpf_insn bpf_prog[];                     /* bpf program */
};

#define NG_BPF_HOOKPROG_SIZE(numInsn)   \
        (sizeof(struct ng_bpf_hookprog) + (numInsn) * sizeof(struct bpf_insn))

/* Keep this in sync with the above structure definition */
#define NG_BPF_HOOKPROG_TYPE_INFO(bptype)       {               \
          { "thisHook",         &ng_parse_hookbuf_type  },      \
          { "ifMatch",          &ng_parse_hookbuf_type  },      \
          { "ifNotMatch",       &ng_parse_hookbuf_type  },      \
          { "bpf_prog_len",     &ng_parse_int32_type    },      \
          { "bpf_prog",         (bptype)                },      \
          { NULL }                                              \
}

/* Statistics structure for one hook */
struct ng_bpf_hookstat {
        u_int64_t       recvFrames;
        u_int64_t       recvOctets;
        u_int64_t       recvMatchFrames;
        u_int64_t       recvMatchOctets;
        u_int64_t       xmitFrames;
        u_int64_t       xmitOctets;
};

/* Keep this in sync with the above structure definition */
#define NG_BPF_HOOKSTAT_TYPE_INFO       {                       \
          { "recvFrames",       &ng_parse_uint64_type   },      \
          { "recvOctets",       &ng_parse_uint64_type   },      \
          { "recvMatchFrames",  &ng_parse_uint64_type   },      \
          { "recvMatchOctets",  &ng_parse_uint64_type   },      \
          { "xmitFrames",       &ng_parse_uint64_type   },      \
          { "xmitOctets",       &ng_parse_uint64_type   },      \
          { NULL }                                              \
}

/* Netgraph commands */
enum {
        NGM_BPF_SET_PROGRAM = 1,        /* supply a struct ng_bpf_hookprog */
        NGM_BPF_GET_PROGRAM,            /* returns a struct ng_bpf_hookprog */
        NGM_BPF_GET_STATS,              /* supply name as char[NG_HOOKSIZ] */
        NGM_BPF_CLR_STATS,              /* supply name as char[NG_HOOKSIZ] */
        NGM_BPF_GETCLR_STATS,           /* supply name as char[NG_HOOKSIZ] */
};

#endif /* _NETGRAPH_NG_BPF_H_ */
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