ng_macfilter.c File Reference

#include <sys/param.h>
#include <sys/ctype.h>
#include <sys/systm.h>
#include <sys/lock.h>
#include <sys/mbuf.h>
#include <sys/mutex.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/socket.h>
#include <net/ethernet.h>
#include <netgraph/ng_message.h>
#include <netgraph/netgraph.h>
#include <netgraph/ng_parse.h>
#include "ng_macfilter.h"

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Data Structures
struct	macfilter_p

Macros
#define	M_NETGRAPH_MACFILTER   M_NETGRAPH
#define	MACTABLE_BLOCKSIZE   128 /* block size for incrementing table */
#define	MACFILTER_DEBUG(fmt, ...)
#define	MAC_FMT   "%02x:%02x:%02x:%02x:%02x:%02x"
#define	MAC_S_ARGS(v)   (v)[0], (v)[1], (v)[2], (v)[3], (v)[4], (v)[5]

Typedefs
typedef struct ngm_macfilter_mac *	mf_mac_p

Functions
static int	macfilter_get_macs_count (const struct ng_parse_type *type, const u_char *start, const u_char *buf)
static int	macfilter_get_upper_hook_count (const struct ng_parse_type *type, const u_char *start, const u_char *buf)
	NETGRAPH_INIT (macfilter, &typestruct)
static int	macfilter_mactable_resize (macfilter_p mfp)
static void	macfilter_reset (macfilter_p mfp)
static void	macfilter_reset_stats (macfilter_p mfp)
static int	macfilter_mac_count (macfilter_p mfp, int hookid)
static u_int	macfilter_find_mac (macfilter_p mfp, const u_char *ether, u_int *ri)
static int	macfilter_mactable_change (macfilter_p mfp, u_char *ether, int hookid)
static int	macfilter_mactable_remove_by_hookid (macfilter_p mfp, int hookid)
static int	macfilter_find_hook (macfilter_p mfp, const char *hookname)
static int	macfilter_direct (macfilter_p mfp, struct ngm_macfilter_direct *md)
static int	macfilter_direct_hookid (macfilter_p mfp, struct ngm_macfilter_direct_hookid *mdi)
static int	macfilter_ether_output (hook_p hook, macfilter_p mfp, struct mbuf *m, hook_p *next_hook)
static int	macfilter_ether_input (hook_p hook, macfilter_p mfp, struct mbuf *m, hook_p *next_hook)
static int	ng_macfilter_constructor (node_p node)
static int	ng_macfilter_newhook (node_p node, hook_p hook, const char *hookname)
static int	ng_macfilter_rcvmsg (node_p node, item_p item, hook_p lasthook)
static int	ng_macfilter_rcvdata (hook_p hook, item_p item)
static int	ng_macfilter_disconnect (hook_p hook)
static int	ng_macfilter_shutdown (node_p node)

Variables
static const struct ng_parse_struct_field	macfilter_direct_fields [] = NGM_MACFILTER_DIRECT_FIELDS
static const struct ng_parse_type	ng_macfilter_direct_type
static const struct ng_parse_struct_field	macfilter_direct_ndx_fields [] = NGM_MACFILTER_DIRECT_NDX_FIELDS
static const struct ng_parse_type	ng_macfilter_direct_hookid_type
static const struct ng_parse_struct_field	ng_macfilter_mac_fields [] = NGM_MACFILTER_MAC_FIELDS
static const struct ng_parse_type	ng_macfilter_mac_type
static const struct ng_parse_array_info	ng_macfilter_macs_array_info
static const struct ng_parse_type	ng_macfilter_macs_array_type
static const struct ng_parse_struct_field	ng_macfilter_macs_fields [] = NGM_MACFILTER_MACS_FIELDS
static const struct ng_parse_type	ng_macfilter_macs_type
static const struct ng_parse_struct_field	ng_macfilter_hook_fields [] = NGM_MACFILTER_HOOK_FIELDS
static const struct ng_parse_type	ng_macfilter_hook_type
static const struct ng_parse_array_info	ng_macfilter_hooks_array_info
static const struct ng_parse_type	ng_macfilter_hooks_array_type
static const struct ng_parse_struct_field	ng_macfilter_hooks_fields [] = NGM_MACFILTER_HOOKS_FIELDS
static const struct ng_parse_type	ng_macfilter_hooks_type
static const struct ng_cmdlist	ng_macfilter_cmdlist []
static ng_constructor_t	ng_macfilter_constructor
static ng_rcvmsg_t	ng_macfilter_rcvmsg
static ng_shutdown_t	ng_macfilter_shutdown
static ng_newhook_t	ng_macfilter_newhook
static ng_rcvdata_t	ng_macfilter_rcvdata
static ng_disconnect_t	ng_macfilter_disconnect
static struct ng_type	typestruct

Macro Definition Documentation

M_NETGRAPH_MACFILTER

#define M_NETGRAPH_MACFILTER   M_NETGRAPH

Definition at line 73 of file ng_macfilter.c.

MAC_FMT

#define MAC_FMT   "%02x:%02x:%02x:%02x:%02x:%02x"

Definition at line 83 of file ng_macfilter.c.

MAC_S_ARGS

#define MAC_S_ARGS

(

v

)

(v)[0], (v)[1], (v)[2], (v)[3], (v)[4], (v)[5]

Definition at line 84 of file ng_macfilter.c.

MACFILTER_DEBUG

#define MACFILTER_DEBUG	(		fmt,
			...
	)

Definition at line 81 of file ng_macfilter.c.

MACTABLE_BLOCKSIZE

#define MACTABLE_BLOCKSIZE   128 /* block size for incrementing table */

Definition at line 76 of file ng_macfilter.c.

Typedef Documentation

mf_mac_p

typedef struct ngm_macfilter_mac* mf_mac_p

Definition at line 261 of file ng_macfilter.c.

Function Documentation

macfilter_direct()

static int macfilter_direct ( macfilter_p  mfp, struct ngm_macfilter_direct *  md  )

static

Definition at line 494 of file ng_macfilter.c.

References ngm_macfilter_direct::ether, ngm_macfilter_direct::hookname, MAC_FMT, MAC_S_ARGS, MACFILTER_DEBUG, macfilter_find_hook(), and macfilter_mactable_change().

Referenced by ng_macfilter_rcvmsg().

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macfilter_direct_hookid()

static int macfilter_direct_hookid ( macfilter_p  mfp, struct ngm_macfilter_direct_hookid *  mdi  )

static

Definition at line 507 of file ng_macfilter.c.

References ngm_macfilter_direct_hookid::ether, ngm_macfilter_direct_hookid::hookid, MAC_FMT, MAC_S_ARGS, MACFILTER_DEBUG, macfilter_mactable_change(), macfilter_p::mf_upper, and macfilter_p::mf_upper_cnt.

Referenced by ng_macfilter_rcvmsg().

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macfilter_ether_input()

static int macfilter_ether_input ( hook_p  hook, macfilter_p  mfp, struct mbuf *  m, hook_p *  next_hook  )

static

Definition at line 570 of file ng_macfilter.c.

References ngm_macfilter_mac::bytes_in, ngm_macfilter_mac::hookid, MAC_FMT, MAC_S_ARGS, MACFILTER_DEBUG, macfilter_find_mac(), macfilter_p::mf_macs, macfilter_p::mf_upper, macfilter_p::mf_upper_cnt, macfilter_p::mtx, NG_HOOK_NAME, NG_MACFILTER_HOOK_DEFAULT_ID, and ngm_macfilter_mac::packets_in.

Referenced by ng_macfilter_rcvdata().

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macfilter_ether_output()

static int macfilter_ether_output ( hook_p  hook, macfilter_p  mfp, struct mbuf *  m, hook_p *  next_hook  )

static

Definition at line 529 of file ng_macfilter.c.

References ngm_macfilter_mac::bytes_out, MAC_FMT, MAC_S_ARGS, MACFILTER_DEBUG, macfilter_find_mac(), macfilter_p::mf_ether_hook, macfilter_p::mf_macs, macfilter_p::mtx, NG_HOOK_NAME, and ngm_macfilter_mac::packets_out.

Referenced by ng_macfilter_rcvdata().

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macfilter_find_hook()

static int macfilter_find_hook ( macfilter_p  mfp, const char *  hookname  )

static

Definition at line 477 of file ng_macfilter.c.

References macfilter_p::mf_upper, macfilter_p::mf_upper_cnt, NG_HOOK_NAME, and NG_HOOKSIZ.

Referenced by macfilter_direct().

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macfilter_find_mac()

static u_int macfilter_find_mac ( macfilter_p  mfp, const u_char *  ether, u_int *  ri  )

static

Definition at line 373 of file ng_macfilter.c.

References macfilter_p::mf_mac_used, and macfilter_p::mf_macs.

Referenced by macfilter_ether_input(), macfilter_ether_output(), and macfilter_mactable_change().

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macfilter_get_macs_count()

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

static

Definition at line 112 of file ng_macfilter.c.

References ngm_macfilter_macs::macs, ngm_macfilter_macs::n, and OFFSETOF.

macfilter_get_upper_hook_count()

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

static

Definition at line 145 of file ng_macfilter.c.

References ngm_macfilter_hooks::hooks, MACFILTER_DEBUG, ngm_macfilter_hooks::n, and OFFSETOF.

macfilter_mac_count()

static int macfilter_mac_count ( macfilter_p  mfp, int  hookid  )

static

Definition at line 351 of file ng_macfilter.c.

References ngm_macfilter_mac::hookid, macfilter_p::mf_mac_used, and macfilter_p::mf_macs.

Referenced by ng_macfilter_rcvmsg().

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macfilter_mactable_change()

static int macfilter_mactable_change ( macfilter_p  mfp, u_char *  ether, int  hookid  )

static

Definition at line 406 of file ng_macfilter.c.

References ngm_macfilter_mac::hookid, MAC_FMT, MAC_S_ARGS, MACFILTER_DEBUG, macfilter_find_mac(), macfilter_mactable_resize(), macfilter_p::mf_mac_allocated, macfilter_p::mf_mac_used, macfilter_p::mf_macs, and NG_MACFILTER_HOOK_DEFAULT_ID.

Referenced by macfilter_direct(), and macfilter_direct_hookid().

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macfilter_mactable_remove_by_hookid()

static int macfilter_mactable_remove_by_hookid ( macfilter_p  mfp, int  hookid  )

static

Definition at line 457 of file ng_macfilter.c.

References ngm_macfilter_mac::hookid, macfilter_mactable_resize(), macfilter_p::mf_mac_used, and macfilter_p::mf_macs.

Referenced by ng_macfilter_disconnect().

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macfilter_mactable_resize()

static int macfilter_mactable_resize ( macfilter_p  mfp )

static

Definition at line 284 of file ng_macfilter.c.

References MACFILTER_DEBUG, MACTABLE_BLOCKSIZE, macfilter_p::mf_mac_allocated, macfilter_p::mf_mac_used, and macfilter_p::mf_macs.

Referenced by macfilter_mactable_change(), macfilter_mactable_remove_by_hookid(), macfilter_reset(), and ng_macfilter_constructor().

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macfilter_reset()

static void macfilter_reset ( macfilter_p  mfp )

static

Definition at line 321 of file ng_macfilter.c.

References macfilter_mactable_resize(), and macfilter_p::mf_mac_used.

Referenced by ng_macfilter_rcvmsg().

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macfilter_reset_stats()

static void macfilter_reset_stats ( macfilter_p  mfp )

static

Definition at line 334 of file ng_macfilter.c.

References ngm_macfilter_mac::bytes_in, ngm_macfilter_mac::bytes_out, macfilter_p::mf_mac_used, macfilter_p::mf_macs, ngm_macfilter_mac::packets_in, and ngm_macfilter_mac::packets_out.

Referenced by ng_macfilter_rcvmsg().

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NETGRAPH_INIT()

NETGRAPH_INIT	(	macfilter	,
		&	typestruct
	)

ng_macfilter_constructor()

static int ng_macfilter_constructor ( node_p  node )

static

Definition at line 623 of file ng_macfilter.c.

References macfilter_mactable_resize(), macfilter_p::mtx, and NG_NODE_SET_PRIVATE.

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ng_macfilter_disconnect()

static int ng_macfilter_disconnect ( hook_p  hook )

static

Definition at line 814 of file ng_macfilter.c.

References MACFILTER_DEBUG, macfilter_mactable_remove_by_hookid(), macfilter_p::mf_ether_hook, macfilter_p::mf_upper, macfilter_p::mf_upper_cnt, macfilter_p::mtx, NG_HOOK_NAME, NG_HOOK_NODE, NG_NODE_IS_VALID, NG_NODE_NUMHOOKS, NG_NODE_PRIVATE, and ng_rmnode_self().

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ng_macfilter_newhook()

static int ng_macfilter_newhook ( node_p  node, hook_p  hook, const char *  hookname  )

static

Definition at line 641 of file ng_macfilter.c.

References MACFILTER_DEBUG, macfilter_p::mf_ether_hook, macfilter_p::mf_upper, macfilter_p::mf_upper_cnt, NG_MACFILTER_HOOK_DEFAULT, NG_MACFILTER_HOOK_DEFAULT_ID, NG_MACFILTER_HOOK_ETHER, and NG_NODE_PRIVATE.

ng_macfilter_rcvdata()

static int ng_macfilter_rcvdata ( hook_p  hook, item_p  item  )

static

Definition at line 788 of file ng_macfilter.c.

References MACFILTER_DEBUG, macfilter_ether_input(), macfilter_ether_output(), macfilter_p::mf_ether_hook, NG_FREE_ITEM, NG_FWD_ITEM_HOOK, NG_HOOK_NAME, NG_HOOK_NODE, NG_NODE_PRIVATE, and NGI_M.

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ng_macfilter_rcvmsg()

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

static

Definition at line 675 of file ng_macfilter.c.

References ng_mesg::ng_msghdr::arglen, ng_mesg::ng_msghdr::cmd, ng_mesg::data, ng_mesg::header, ngm_macfilter_direct_hookid::hookid, ngm_macfilter_hook::hookid, ngm_macfilter_hook::hookname, ngm_macfilter_hooks::hooks, ngm_macfilter_hook::maccnt, MACFILTER_DEBUG, macfilter_direct(), macfilter_direct_hookid(), macfilter_mac_count(), macfilter_reset(), macfilter_reset_stats(), ngm_macfilter_macs::macs, macfilter_p::mf_mac_used, macfilter_p::mf_macs, macfilter_p::mf_upper, macfilter_p::mf_upper_cnt, macfilter_p::mtx, ngm_macfilter_macs::n, ngm_macfilter_hooks::n, NG_FREE_MSG, NG_HOOK_NAME, NG_HOOKSIZ, NG_MKRESPONSE, NG_NODE_PRIVATE, NG_RESPOND_MSG, NGI_GET_MSG, NGM_MACFILTER_CLR_MACS, NGM_MACFILTER_COOKIE, NGM_MACFILTER_DIRECT, NGM_MACFILTER_DIRECT_HOOKID, NGM_MACFILTER_GET_HOOKS, NGM_MACFILTER_GET_MACS, NGM_MACFILTER_GETCLR_MACS, NGM_MACFILTER_RESET, and ng_mesg::ng_msghdr::typecookie.

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ng_macfilter_shutdown()

static int ng_macfilter_shutdown ( node_p  node )

static

Definition at line 866 of file ng_macfilter.c.

References macfilter_p::mf_macs, macfilter_p::mf_upper, macfilter_p::mtx, NG_NODE_PRIVATE, and NG_NODE_UNREF.

Variable Documentation

macfilter_direct_fields

const struct ng_parse_struct_field macfilter_direct_fields[] = NGM_MACFILTER_DIRECT_FIELDS

static

Definition at line 90 of file ng_macfilter.c.

macfilter_direct_ndx_fields

const struct ng_parse_struct_field macfilter_direct_ndx_fields[] = NGM_MACFILTER_DIRECT_NDX_FIELDS

static

Definition at line 101 of file ng_macfilter.c.

ng_macfilter_cmdlist

const struct ng_cmdlist ng_macfilter_cmdlist[]

static

Definition at line 180 of file ng_macfilter.c.

ng_macfilter_constructor

ng_constructor_t ng_macfilter_constructor

static

Definition at line 236 of file ng_macfilter.c.

ng_macfilter_direct_hookid_type

const struct ng_parse_type ng_macfilter_direct_hookid_type

static

Initial value:

= {
    &ng_parse_struct_type,
    &macfilter_direct_ndx_fields
}

Definition at line 103 of file ng_macfilter.c.

ng_macfilter_direct_type

const struct ng_parse_type ng_macfilter_direct_type

static

Initial value:

= {
    &ng_parse_struct_type,
    &macfilter_direct_fields
}

Definition at line 92 of file ng_macfilter.c.

ng_macfilter_disconnect

ng_disconnect_t ng_macfilter_disconnect

static

Definition at line 241 of file ng_macfilter.c.

ng_macfilter_hook_fields

const struct ng_parse_struct_field ng_macfilter_hook_fields[] = NGM_MACFILTER_HOOK_FIELDS

static

Definition at line 156 of file ng_macfilter.c.

ng_macfilter_hook_type

const struct ng_parse_type ng_macfilter_hook_type

static

Initial value:

= {
    &ng_parse_struct_type,
    ng_macfilter_hook_fields,
}

Definition at line 158 of file ng_macfilter.c.

ng_macfilter_hooks_array_info

const struct ng_parse_array_info ng_macfilter_hooks_array_info

static

Initial value:

= {
    &ng_macfilter_hook_type,
    macfilter_get_upper_hook_count   
}

Definition at line 162 of file ng_macfilter.c.

ng_macfilter_hooks_array_type

const struct ng_parse_type ng_macfilter_hooks_array_type

static

Initial value:

= {
    &ng_parse_array_type,
    &ng_macfilter_hooks_array_info
}

Definition at line 166 of file ng_macfilter.c.

ng_macfilter_hooks_fields

const struct ng_parse_struct_field ng_macfilter_hooks_fields[] = NGM_MACFILTER_HOOKS_FIELDS

static

Definition at line 170 of file ng_macfilter.c.

ng_macfilter_hooks_type

const struct ng_parse_type ng_macfilter_hooks_type

static

Initial value:

= {
    &ng_parse_struct_type,
    &ng_macfilter_hooks_fields
}

Definition at line 172 of file ng_macfilter.c.

ng_macfilter_mac_fields

const struct ng_parse_struct_field ng_macfilter_mac_fields[] = NGM_MACFILTER_MAC_FIELDS

static

Definition at line 120 of file ng_macfilter.c.

ng_macfilter_mac_type

const struct ng_parse_type ng_macfilter_mac_type

static

Initial value:

= {
    &ng_parse_struct_type,
    ng_macfilter_mac_fields,
}

Definition at line 122 of file ng_macfilter.c.

ng_macfilter_macs_array_info

const struct ng_parse_array_info ng_macfilter_macs_array_info

static

Initial value:

= {
    &ng_macfilter_mac_type,
    macfilter_get_macs_count
}

Definition at line 126 of file ng_macfilter.c.

ng_macfilter_macs_array_type

const struct ng_parse_type ng_macfilter_macs_array_type

static

Initial value:

= {
    &ng_parse_array_type,
    &ng_macfilter_macs_array_info
}

Definition at line 130 of file ng_macfilter.c.

ng_macfilter_macs_fields

const struct ng_parse_struct_field ng_macfilter_macs_fields[] = NGM_MACFILTER_MACS_FIELDS

static

Definition at line 134 of file ng_macfilter.c.

ng_macfilter_macs_type

const struct ng_parse_type ng_macfilter_macs_type

static

Initial value:

= {
    &ng_parse_struct_type,
    &ng_macfilter_macs_fields
}

Definition at line 136 of file ng_macfilter.c.

ng_macfilter_newhook

ng_newhook_t ng_macfilter_newhook

static

Definition at line 239 of file ng_macfilter.c.

ng_macfilter_rcvdata

ng_rcvdata_t ng_macfilter_rcvdata

static

Definition at line 240 of file ng_macfilter.c.

ng_macfilter_rcvmsg

ng_rcvmsg_t ng_macfilter_rcvmsg

static

Definition at line 237 of file ng_macfilter.c.

ng_macfilter_shutdown

ng_shutdown_t ng_macfilter_shutdown

static

Definition at line 238 of file ng_macfilter.c.

typestruct

struct ng_type typestruct

static

Initial value:

= {
    .version =     NG_ABI_VERSION,
    .name =        NG_MACFILTER_NODE_TYPE,
    .constructor = ng_macfilter_constructor,
    .rcvmsg =      ng_macfilter_rcvmsg,
    .shutdown =    ng_macfilter_shutdown,
    .newhook =     ng_macfilter_newhook,
    .rcvdata =     ng_macfilter_rcvdata,
    .disconnect =  ng_macfilter_disconnect,
    .cmdlist =     ng_macfilter_cmdlist
}

Definition at line 243 of file ng_macfilter.c.