ng_bpf.c File Reference

#include "opt_bpf.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <net/bpf.h>
#include <netgraph/ng_message.h>
#include <netgraph/netgraph.h>
#include <netgraph/ng_parse.h>
#include <netgraph/ng_bpf.h>

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Data Structures
struct	ng_bpf_hookinfo

Macros
#define	M_NETGRAPH_BPF   M_NETGRAPH
#define	OFFSETOF(s, e)   ((char *)&((s *)0)->e - (char *)((s *)0))
#define	ERROUT(x)   do { error = (x); goto done; } while (0)

Typedefs
typedef struct ng_bpf_hookinfo *	hinfo_p

Functions
static int	ng_bpf_setprog (hook_p hook, const struct ng_bpf_hookprog *hp)
static int	ng_bpf_hookprogary_getLength (const struct ng_parse_type *type, const u_char *start, const u_char *buf)
	NETGRAPH_INIT (bpf, &typestruct)
static int	ng_bpf_constructor (node_p node)
static int	ng_bpf_addrefs (hook_p hook, void *arg)
static int	ng_bpf_remrefs (hook_p hook, void *arg)
static int	ng_bpf_newhook (node_p node, hook_p hook, const char *name)
static int	ng_bpf_rcvmsg (node_p node, item_p item, hook_p lasthook)
static int	ng_bpf_rcvdata (hook_p hook, item_p item)
static int	ng_bpf_shutdown (node_p node)
static int	ng_bpf_disconnect (hook_p hook)

Variables
static ng_constructor_t	ng_bpf_constructor
static ng_rcvmsg_t	ng_bpf_rcvmsg
static ng_shutdown_t	ng_bpf_shutdown
static ng_newhook_t	ng_bpf_newhook
static ng_rcvdata_t	ng_bpf_rcvdata
static ng_disconnect_t	ng_bpf_disconnect
int	bpf_maxinsns
static const struct ng_parse_struct_field	ng_bpf_insn_type_fields []
static const struct ng_parse_type	ng_bpf_insn_type
static const struct ng_parse_array_info	ng_bpf_hookprogary_info
static const struct ng_parse_type	ng_bpf_hookprogary_type
static const struct ng_parse_struct_field	ng_bpf_hookprog_type_fields [] = NG_BPF_HOOKPROG_TYPE_INFO(&ng_bpf_hookprogary_type)
static const struct ng_parse_type	ng_bpf_hookprog_type
static const struct ng_parse_struct_field	ng_bpf_hookstat_type_fields [] = NG_BPF_HOOKSTAT_TYPE_INFO
static const struct ng_parse_type	ng_bpf_hookstat_type
static const struct ng_cmdlist	ng_bpf_cmdlist []
static struct ng_type	typestruct
static const struct ng_bpf_hookprog	ng_bpf_default_prog

Macro Definition Documentation

ERROUT

#define ERROUT

(

x

)

do { error = (x); goto done; } while (0)

Definition at line 84 of file ng_bpf.c.

M_NETGRAPH_BPF

#define M_NETGRAPH_BPF   M_NETGRAPH

Definition at line 79 of file ng_bpf.c.

OFFSETOF

#define OFFSETOF	(		s,
			e
	)		((char *)&((s *)0)->e - (char *)((s *)0))

Definition at line 82 of file ng_bpf.c.

Typedef Documentation

hinfo_p

typedef struct ng_bpf_hookinfo* hinfo_p

Definition at line 97 of file ng_bpf.c.

Function Documentation

NETGRAPH_INIT()

NETGRAPH_INIT	(	bpf	,
		&	typestruct
	)

ng_bpf_addrefs()

static int ng_bpf_addrefs ( hook_p  hook, void *  arg  )

static

Definition at line 244 of file ng_bpf.c.

References ng_bpf_hookprog::ifMatch, ng_bpf_hookprog::ifNotMatch, ng_bpf_hookinfo::match, NG_HOOK_NAME, NG_HOOK_PRIVATE, ng_bpf_hookinfo::nomatch, and ng_bpf_hookinfo::prog.

Referenced by ng_bpf_newhook().

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ng_bpf_constructor()

static int ng_bpf_constructor ( node_p  node )

static

Definition at line 234 of file ng_bpf.c.

References NG_NODE_SET_PRIVATE.

ng_bpf_disconnect()

static int ng_bpf_disconnect ( hook_p  hook )

static

Definition at line 523 of file ng_bpf.c.

References M_NETGRAPH_BPF, ng_bpf_remrefs(), NG_HOOK_NODE, NG_HOOK_PRIVATE, NG_NODE_FOREACH_HOOK, NG_NODE_IS_VALID, NG_NODE_NUMHOOKS, ng_rmnode_self(), and ng_bpf_hookinfo::prog.

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ng_bpf_hookprogary_getLength()

static int ng_bpf_hookprogary_getLength ( const struct ng_parse_type *  type, const u_char *  start, const u_char *  buf  )

static

Definition at line 128 of file ng_bpf.c.

References ng_bpf_hookprog::bpf_prog, ng_bpf_hookprog::bpf_prog_len, and OFFSETOF.

ng_bpf_newhook()

static int ng_bpf_newhook ( node_p  node, hook_p  hook, const char *  name  )

static

Definition at line 273 of file ng_bpf.c.

References ng_bpf_hookinfo::hook, M_NETGRAPH_BPF, name, ng_bpf_addrefs(), ng_bpf_default_prog, ng_bpf_setprog(), NG_HOOK_SET_PRIVATE, NG_NODE_FOREACH_HOOK, ng_bpf_hookinfo::prog, and ng_bpf_hookprog::thisHook.

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ng_bpf_rcvdata()

static int ng_bpf_rcvdata ( hook_p  hook, item_p  item  )

static

Definition at line 415 of file ng_bpf.c.

References ng_bpf_hookprog::bpf_prog, data, M_NETGRAPH_BPF, ng_bpf_hookinfo::match, NG_FREE_ITEM, NG_FWD_ITEM_HOOK, NG_HOOK_PRIVATE, NGI_M, ng_bpf_hookinfo::nomatch, ng_bpf_hookinfo::prog, ng_bpf_hookstat::recvFrames, ng_bpf_hookstat::recvMatchFrames, ng_bpf_hookstat::recvMatchOctets, ng_bpf_hookstat::recvOctets, ng_bpf_hookinfo::stats, ng_bpf_hookstat::xmitFrames, and ng_bpf_hookstat::xmitOctets.

ng_bpf_rcvmsg()

static int ng_bpf_rcvmsg ( node_p  node, item_p  item, hook_p  lasthook  )

static

Definition at line 305 of file ng_bpf.c.

References ng_mesg::ng_msghdr::arglen, ng_bpf_hookprog::bpf_prog_len, ng_mesg::ng_msghdr::cmd, ng_mesg::data, ERROUT, ng_mesg::header, NG_BPF_HOOKPROG_SIZE, ng_bpf_setprog(), ng_findhook(), NG_FREE_MSG, NG_HOOK_PRIVATE, NG_MKRESPONSE, NG_RESPOND_MSG, NGI_GET_MSG, NGM_BPF_CLR_STATS, NGM_BPF_COOKIE, NGM_BPF_GET_PROGRAM, NGM_BPF_GET_STATS, NGM_BPF_GETCLR_STATS, NGM_BPF_SET_PROGRAM, ng_bpf_hookprog::thisHook, and ng_mesg::ng_msghdr::typecookie.

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ng_bpf_remrefs()

static int ng_bpf_remrefs ( hook_p  hook, void *  arg  )

static

Definition at line 257 of file ng_bpf.c.

References ng_bpf_hookinfo::match, NG_HOOK_PRIVATE, and ng_bpf_hookinfo::nomatch.

Referenced by ng_bpf_disconnect().

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ng_bpf_setprog()

static int ng_bpf_setprog ( hook_p  hook, const struct ng_bpf_hookprog *  hp  )

static

Definition at line 555 of file ng_bpf.c.

References bpf_maxinsns, ng_bpf_hookprog::bpf_prog, ng_bpf_hookprog::bpf_prog_len, ng_bpf_hookprog::ifMatch, ng_bpf_hookprog::ifNotMatch, M_NETGRAPH_BPF, ng_bpf_hookinfo::match, NG_BPF_HOOKPROG_SIZE, ng_findhook(), NG_HOOK_NODE, NG_HOOK_PRIVATE, ng_bpf_hookinfo::nomatch, and ng_bpf_hookinfo::prog.

Referenced by ng_bpf_newhook(), and ng_bpf_rcvmsg().

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ng_bpf_shutdown()

static int ng_bpf_shutdown ( node_p  node )

static

Definition at line 513 of file ng_bpf.c.

References NG_NODE_UNREF.

Variable Documentation

bpf_maxinsns

int bpf_maxinsns

extern

Referenced by ng_bpf_setprog().

ng_bpf_cmdlist

const struct ng_cmdlist ng_bpf_cmdlist[]

static

Definition at line 165 of file ng_bpf.c.

ng_bpf_constructor

ng_constructor_t ng_bpf_constructor

static

Definition at line 100 of file ng_bpf.c.

ng_bpf_default_prog

const struct ng_bpf_hookprog ng_bpf_default_prog

static

Initial value:

= {
        { '\0' },               
        { '\0' },
        { '\0' },
        1,
        { BPF_STMT(BPF_RET+BPF_K, 0) }
}

Definition at line 219 of file ng_bpf.c.

Referenced by ng_bpf_newhook().

ng_bpf_disconnect

ng_disconnect_t ng_bpf_disconnect

static

Definition at line 105 of file ng_bpf.c.

ng_bpf_hookprog_type

const struct ng_parse_type ng_bpf_hookprog_type

static

Initial value:

= {
        &ng_parse_struct_type,
        &ng_bpf_hookprog_type_fields
}

Definition at line 151 of file ng_bpf.c.

ng_bpf_hookprog_type_fields

const struct ng_parse_struct_field ng_bpf_hookprog_type_fields[] = NG_BPF_HOOKPROG_TYPE_INFO(&ng_bpf_hookprogary_type)

static

Definition at line 149 of file ng_bpf.c.

ng_bpf_hookprogary_info

const struct ng_parse_array_info ng_bpf_hookprogary_info

static

Initial value:

= {
        &ng_bpf_insn_type,
        &ng_bpf_hookprogary_getLength,
        NULL
}

Definition at line 138 of file ng_bpf.c.

ng_bpf_hookprogary_type

const struct ng_parse_type ng_bpf_hookprogary_type

static

Initial value:

= {
        &ng_parse_array_type,
        &ng_bpf_hookprogary_info
}

Definition at line 143 of file ng_bpf.c.

ng_bpf_hookstat_type

const struct ng_parse_type ng_bpf_hookstat_type

static

Initial value:

= {
        &ng_parse_struct_type,
        &ng_bpf_hookstat_type_fields
}

Definition at line 159 of file ng_bpf.c.

ng_bpf_hookstat_type_fields

const struct ng_parse_struct_field ng_bpf_hookstat_type_fields[] = NG_BPF_HOOKSTAT_TYPE_INFO

static

Definition at line 157 of file ng_bpf.c.

ng_bpf_insn_type

const struct ng_parse_type ng_bpf_insn_type

static

Initial value:

= {
        &ng_parse_struct_type,
        &ng_bpf_insn_type_fields
}

Definition at line 121 of file ng_bpf.c.

ng_bpf_insn_type_fields

const struct ng_parse_struct_field ng_bpf_insn_type_fields[]

static

Initial value:

= {
        { "code",       &ng_parse_hint16_type   },
        { "jt",         &ng_parse_uint8_type    },
        { "jf",         &ng_parse_uint8_type    },
        { "k",          &ng_parse_uint32_type   },
        { NULL }
}

Definition at line 114 of file ng_bpf.c.

ng_bpf_newhook

ng_newhook_t ng_bpf_newhook

static

Definition at line 103 of file ng_bpf.c.

ng_bpf_rcvdata

ng_rcvdata_t ng_bpf_rcvdata

static

Definition at line 104 of file ng_bpf.c.

ng_bpf_rcvmsg

ng_rcvmsg_t ng_bpf_rcvmsg

static

Definition at line 101 of file ng_bpf.c.

ng_bpf_shutdown

ng_shutdown_t ng_bpf_shutdown

static

Definition at line 102 of file ng_bpf.c.

typestruct

struct ng_type typestruct

static

Initial value:

= {
        .version =      NG_ABI_VERSION,
        .name =         NG_BPF_NODE_TYPE,
        .constructor =  ng_bpf_constructor,
        .rcvmsg =       ng_bpf_rcvmsg,
        .shutdown =     ng_bpf_shutdown,
        .newhook =      ng_bpf_newhook,
        .rcvdata =      ng_bpf_rcvdata,
        .disconnect =   ng_bpf_disconnect,
        .cmdlist =      ng_bpf_cmdlist,
}

Definition at line 205 of file ng_bpf.c.