ng_patch.c File Reference

#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/endian.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <net/bpf.h>
#include <net/ethernet.h>
#include <netgraph/ng_message.h>
#include <netgraph/ng_parse.h>
#include <netgraph/netgraph.h>
#include <netgraph/ng_patch.h>

Include dependency graph for ng_patch.c:

Go to the source code of this file.

Data Structures
struct	ng_patch_priv

Macros
#define	ERROUT(x)   { error = (x); goto done; }
#define	PULLUP_CHECK(mbuf, length)

Typedefs
typedef struct ng_patch_priv *	priv_p

Functions
	__FBSDID ("$FreeBSD$")
static int	ng_patch_config_getlen (const struct ng_parse_type *type, const u_char *start, const u_char *buf)
	NETGRAPH_INIT (patch, &typestruct)
static int	ng_patch_constructor (node_p node)
static int	ng_patch_newhook (node_p node, hook_p hook, const char *name)
static int	ng_patch_rcvmsg (node_p node, item_p item, hook_p lasthook)
static void	do_patch (priv_p privp, struct mbuf *m, int global_offset)
static int	ng_patch_rcvdata (hook_p hook, item_p item)
static int	ng_patch_shutdown (node_p node)
static int	ng_patch_disconnect (hook_p hook)

Variables
static ng_constructor_t	ng_patch_constructor
static ng_rcvmsg_t	ng_patch_rcvmsg
static ng_shutdown_t	ng_patch_shutdown
static ng_newhook_t	ng_patch_newhook
static ng_rcvdata_t	ng_patch_rcvdata
static ng_disconnect_t	ng_patch_disconnect
static const struct ng_parse_struct_field	ng_patch_op_type_fields [] = NG_PATCH_OP_TYPE
static const struct ng_parse_type	ng_patch_op_type
static const struct ng_parse_array_info	ng_patch_ops_array_info
static const struct ng_parse_type	ng_patch_ops_array_type
static const struct ng_parse_struct_field	ng_patch_config_type_fields [] = NG_PATCH_CONFIG_TYPE
static const struct ng_parse_type	ng_patch_config_type
static const struct ng_parse_struct_field	ng_patch_stats_fields [] = NG_PATCH_STATS_TYPE
static const struct ng_parse_type	ng_patch_stats_type
static const struct ng_cmdlist	ng_patch_cmdlist []
static struct ng_type	typestruct

Macro Definition Documentation

ERROUT

#define ERROUT

(

x

)

{ error = (x); goto done; }

Definition at line 68 of file ng_patch.c.

PULLUP_CHECK

#define PULLUP_CHECK	(		mbuf,
			length
	)

Value:

        do {                                    \
        pullup_len += length;                                           \
        if (((mbuf)->m_pkthdr.len < pullup_len) ||                      \
            (pullup_len > MHLEN)) {                                     \
                error = EINVAL;                                         \
                goto bypass;                                            \
        }                                                               \
        if ((mbuf)->m_len < pullup_len &&                               \
            (((mbuf) = m_pullup((mbuf), pullup_len)) == NULL)) {        \
                error = ENOBUFS;                                        \
                goto drop;                                              \
        }                                                               \
} while (0)

Typedef Documentation

priv_p

typedef struct ng_patch_priv* priv_p

Definition at line 59 of file ng_patch.c.

Function Documentation

__FBSDID()

__FBSDID

(

"$FreeBSD$"

)

do_patch()

static void do_patch ( priv_p  privp, struct mbuf *  m, int  global_offset  )

static

Definition at line 354 of file ng_patch.c.

References NG_PATCH_MODE_ADD, NG_PATCH_MODE_AND, NG_PATCH_MODE_DIV, NG_PATCH_MODE_MUL, NG_PATCH_MODE_NEG, NG_PATCH_MODE_OR, NG_PATCH_MODE_SET, NG_PATCH_MODE_SHL, NG_PATCH_MODE_SHR, NG_PATCH_MODE_SUB, and NG_PATCH_MODE_XOR.

Referenced by ng_patch_rcvdata().

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NETGRAPH_INIT()

NETGRAPH_INIT	(	patch	,
		&	typestruct
	)

ng_patch_config_getlen()

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

static

Definition at line 71 of file ng_patch.c.

References ng_patch_config::count, and ng_patch_config::ops.

ng_patch_constructor()

static int ng_patch_constructor ( node_p  node )

static

Definition at line 180 of file ng_patch.c.

References NG_NODE_SET_PRIVATE.

ng_patch_disconnect()

static int ng_patch_disconnect ( hook_p  hook )

static

Definition at line 676 of file ng_patch.c.

References NG_HOOK_NODE, NG_NODE_IS_VALID, NG_NODE_NUMHOOKS, NG_NODE_PRIVATE, and ng_rmnode_self().

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ng_patch_newhook()

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

static

Definition at line 193 of file ng_patch.c.

References name, NG_NODE_PRIVATE, NG_PATCH_HOOK_IN, and NG_PATCH_HOOK_OUT.

ng_patch_rcvdata()

static int ng_patch_rcvdata ( hook_p  hook, item_p  item  )

static

Definition at line 552 of file ng_patch.c.

References do_patch(), ERROUT, ng_patch_vlan_header::etype, NG_FREE_ITEM, NG_FREE_M, NG_FWD_NEW_DATA, NG_HOOK_NODE, NG_NODE_PRIVATE, NGI_GET_M, PULLUP_CHECK, and priv::stats.

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ng_patch_rcvmsg()

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

static

Definition at line 209 of file ng_patch.c.

References ng_mesg::ng_msghdr::arglen, ng_mesg::ng_msghdr::cmd, ng_patch_config::count, ng_patch_config::csum_flags, ng_mesg::data, ERROUT, ng_mesg::header, ng_patch_op::length, NG_FREE_MSG, NG_MKRESPONSE, NG_NODE_PRIVATE, NG_PATCH_CONF_SIZE, NG_PATCH_CSUM_IPV4, NG_PATCH_CSUM_IPV6, NG_RESPOND_MSG, NGI_GET_MSG, NGM_PATCH_CLR_STATS, NGM_PATCH_COOKIE, NGM_PATCH_GET_STATS, NGM_PATCH_GETCLR_STATS, NGM_PATCH_GETCONFIG, NGM_PATCH_GETDLT, NGM_PATCH_SETCONFIG, NGM_PATCH_SETDLT, ng_patch_config::ops, ng_patch_config::relative_offset, ng_mesg::ng_msghdr::typecookie, ng_patch_op_val::v1, ng_patch_op_val::v2, ng_patch_op_val::v4, ng_patch_op_val::v8, and ng_patch_op::val.

ng_patch_shutdown()

static int ng_patch_shutdown ( node_p  node )

static

Definition at line 660 of file ng_patch.c.

References NG_NODE_PRIVATE, NG_NODE_SET_PRIVATE, and NG_NODE_UNREF.

Variable Documentation

ng_patch_cmdlist

const struct ng_cmdlist ng_patch_cmdlist[]

static

Definition at line 112 of file ng_patch.c.

ng_patch_config_type

const struct ng_parse_type ng_patch_config_type

static

Initial value:

= {
        &ng_parse_struct_type,
        &ng_patch_config_type_fields
}

Definition at line 100 of file ng_patch.c.

ng_patch_config_type_fields

const struct ng_parse_struct_field ng_patch_config_type_fields[] = NG_PATCH_CONFIG_TYPE

static

Definition at line 98 of file ng_patch.c.

ng_patch_constructor

ng_constructor_t ng_patch_constructor

static

Definition at line 62 of file ng_patch.c.

ng_patch_disconnect

ng_disconnect_t ng_patch_disconnect

static

Definition at line 67 of file ng_patch.c.

ng_patch_newhook

ng_newhook_t ng_patch_newhook

static

Definition at line 65 of file ng_patch.c.

ng_patch_op_type

const struct ng_parse_type ng_patch_op_type

static

Initial value:

= {
        &ng_parse_struct_type,
        &ng_patch_op_type_fields
}

Definition at line 84 of file ng_patch.c.

ng_patch_op_type_fields

const struct ng_parse_struct_field ng_patch_op_type_fields[] = NG_PATCH_OP_TYPE

static

Definition at line 82 of file ng_patch.c.

ng_patch_ops_array_info

const struct ng_parse_array_info ng_patch_ops_array_info

static

Initial value:

= {
        &ng_patch_op_type,
        &ng_patch_config_getlen
}

Definition at line 89 of file ng_patch.c.

ng_patch_ops_array_type

const struct ng_parse_type ng_patch_ops_array_type

static

Initial value:

= {
        &ng_parse_array_type,
        &ng_patch_ops_array_info
}

Definition at line 93 of file ng_patch.c.

ng_patch_rcvdata

ng_rcvdata_t ng_patch_rcvdata

static

Definition at line 66 of file ng_patch.c.

ng_patch_rcvmsg

ng_rcvmsg_t ng_patch_rcvmsg

static

Definition at line 63 of file ng_patch.c.

ng_patch_shutdown

ng_shutdown_t ng_patch_shutdown

static

Definition at line 64 of file ng_patch.c.

ng_patch_stats_fields

const struct ng_parse_struct_field ng_patch_stats_fields[] = NG_PATCH_STATS_TYPE

static

Definition at line 105 of file ng_patch.c.

ng_patch_stats_type

const struct ng_parse_type ng_patch_stats_type

static

Initial value:

= {
        &ng_parse_struct_type,
        &ng_patch_stats_fields
}

Definition at line 107 of file ng_patch.c.

typestruct

struct ng_type typestruct

static

Initial value:

= {
        .version =      NG_ABI_VERSION,
        .name =         NG_PATCH_NODE_TYPE,
        .constructor =  ng_patch_constructor,
        .rcvmsg =       ng_patch_rcvmsg,
        .shutdown =     ng_patch_shutdown,
        .newhook =      ng_patch_newhook,
        .rcvdata =      ng_patch_rcvdata,
        .disconnect =   ng_patch_disconnect,
        .cmdlist =      ng_patch_cmdlist,
}

Definition at line 165 of file ng_patch.c.