Abstract Data

Collaboration diagram for Abstract Data:

General
struct nl_data *	nl_data_alloc (const void *buf, size_t size)
	Allocate a new abstract data object. More...
struct nl_data *	nl_data_alloc_attr (const struct nlattr *nla)
	Allocate abstract data object based on netlink attribute. More...
struct nl_data *	nl_data_clone (const struct nl_data *src)
	Clone an abstract data object. More...
int	nl_data_append (struct nl_data *data, void *buf, size_t size)
	Append data to an abstract data object. More...
void	nl_data_free (struct nl_data *data)
	Free an abstract data object. More...

Attribute Access
void *	nl_data_get (const struct nl_data *data)
	Get data buffer of abstract data object. More...
size_t	nl_data_get_size (const struct nl_data *data)
	Get size of data buffer of abstract data object. More...

Misc
int	nl_data_cmp (const struct nl_data *a, const struct nl_data *b)
	Compare two abstract data objects. More...

Detailed Description

Function Documentation

struct nl_data* nl_data_alloc	(	const void *	buf,
		size_t	size
	)

Allocate a new abstract data object.

• buf Data buffer containing the actual data.
• size Size of data buffer.

Allocates a new abstract data and copies the specified data buffer into the new handle.

Returns

Newly allocated data handle or NULL

References nl_data::d_data, nl_data::d_size, data, NULL, and size.

Referenced by nfnl_nft_chain_set_name(), nfnl_nft_chain_set_table(), nfnl_nft_rule_set_chain(), nfnl_nft_rule_set_table(), nfnl_nft_set_set_name(), nfnl_nft_set_set_table(), nfnl_nft_table_set_name(), nl_data_alloc_attr(), nl_data_clone(), and rtnl_cls_data().

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struct nl_data* nl_data_alloc_attr

(

const struct nlattr *

nla

)

Allocate abstract data object based on netlink attribute.

• nla Netlink attribute of unspecific type.

Allocates a new abstract data and copies the payload of the attribute to the abstract data object.

See also

nla_data_alloc

Returns

Newly allocated data handle or NULL

References nl_data_alloc(), nla_data(), and nla_len().

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int nl_data_append	(	struct nl_data *	data,
		void *	buf,
		size_t	size
	)

Append data to an abstract data object.

• data Abstract data object.
• buf Data buffer containing the data to be appended.
• size Size of data to be apppended.

Reallocates an abstract data and copies the specified data buffer into the new handle.

Returns

0 on success or a negative error code

References BUG, nl_data::d_data, nl_data::d_size, NLE_NOMEM, and size.

Referenced by rtnl_u32_add_key().

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struct nl_data* nl_data_clone

(

const struct nl_data *

src

)

Clone an abstract data object.

• src Abstract data object

Returns

Cloned object or NULL

References nl_data::d_data, nl_data::d_size, and nl_data_alloc().

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int nl_data_cmp	(	const struct nl_data *	a,
		const struct nl_data *	b
	)

Compare two abstract data objects.

• a Abstract data object.
• b Another abstract data object.

  Returns

  An integer less than, equal to, or greater than zero if a is found, respectively, to be less than, to match, or be greater than b.

References nl_data_get(), and nl_data_get_size().

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void nl_data_free

(

struct nl_data *

data

)

Free an abstract data object.

• data Abstract data object.

References nl_data::d_data.

Referenced by nfnl_nft_chain_set_name(), nfnl_nft_chain_set_table(), nfnl_nft_rule_set_chain(), nfnl_nft_rule_set_table(), nfnl_nft_set_set_name(), nfnl_nft_set_set_table(), and nfnl_nft_table_set_name().

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void* nl_data_get

(

const struct nl_data *

data

)

Get data buffer of abstract data object.

• data Abstract data object.

  Returns

  Data buffer or NULL if empty.

References nl_data::d_data, nl_data::d_size, and NULL.

Referenced by nfnl_nft_chain_get_name(), nfnl_nft_chain_get_table(), nfnl_nft_rule_get_chain(), nfnl_nft_rule_get_table(), nfnl_nft_set_get_name(), nfnl_nft_set_get_table(), nfnl_nft_table_get_name(), nl_data_cmp(), nla_put_data(), and rtnl_cls_data().

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size_t nl_data_get_size

(

const struct nl_data *

data

)

Get size of data buffer of abstract data object.

• data Abstract data object.

  Returns

  Size of data buffer.

References nl_data::d_size.

Referenced by nl_data_cmp(), and nla_put_data().

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