FIB Lookup

Collaboration diagram for FIB Lookup:

Modules
	Request

Allocation/Freeing
struct flnl_result *	flnl_result_alloc (void)
void	flnl_result_put (struct flnl_result *res)

Cache Management
struct nl_cache *	flnl_result_alloc_cache (void)
	Allocate lookup result cache. More...

Lookup
int	flnl_lookup_build_request (struct flnl_request *req, int flags, struct nl_msg **result)
	Builds a netlink request message to do a lookup. More...
int	flnl_lookup (struct nl_sock *sk, struct flnl_request *req, struct nl_cache *cache)
	Perform FIB Lookup. More...

Attribute Access
int	flnl_result_get_table_id (struct flnl_result *res)
int	flnl_result_get_prefixlen (struct flnl_result *res)
int	flnl_result_get_nexthop_sel (struct flnl_result *res)
int	flnl_result_get_type (struct flnl_result *res)
int	flnl_result_get_scope (struct flnl_result *res)
int	flnl_result_get_error (struct flnl_result *res)

Detailed Description

Function Documentation

int flnl_lookup	(	struct nl_sock *	sk,
		struct flnl_request *	req,
		struct nl_cache *	cache
	)

Perform FIB Lookup.

• sk Netlink socket.
• req Lookup request object.
• cache Cache for result.

Builds a netlink message to request a FIB lookup, waits for the reply and adds the result to the specified cache.

Returns

0 on success or a negative error code.

References flnl_lookup_build_request(), nl_cache_pickup(), nl_send_auto_complete(), and nlmsg_free().

Referenced by main().

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int flnl_lookup_build_request	(	struct flnl_request *	req,
		int	flags,
		struct nl_msg **	result
	)

Builds a netlink request message to do a lookup.

• req Requested match.
• flags additional netlink message flags

Builds a new netlink message requesting a change of link attributes. The netlink message header isn't fully equipped with all relevant fields and must be sent out via nl_send_auto_complete() or supplemented as needed. old must point to a link currently configured in the kernel and tmpl must contain the attributes to be changed set via rtnl_link_set_* functions.

Returns

New netlink message

Note

Not all attributes can be changed, see Changeable Attributes for more details.

References flnl_request_get_addr(), flnl_request_get_fwmark(), flnl_request_get_scope(), flnl_request_get_table(), flnl_request_get_tos(), nl_addr_get_binary_addr(), NLE_MISSING_ATTR, NLE_MSGSIZE, NLE_NOMEM, NLMSG_ALIGNTO, nlmsg_alloc_simple(), nlmsg_append(), nlmsg_free(), RT_SCOPE_UNIVERSE, and RT_TABLE_UNSPEC.

Referenced by flnl_lookup().

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struct flnl_result* flnl_result_alloc

(

void

)

References nl_object_alloc().

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struct nl_cache* flnl_result_alloc_cache

(

void

)

Allocate lookup result cache.

Allocates a new lookup result cache and initializes it properly.

Note

Free the memory after usage using nl_cache_destroy_and_free().

Returns

Newly allocated cache or NULL if an error occured.

References nl_cache_alloc().

Referenced by main().

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int flnl_result_get_error

(

struct flnl_result *

res

)

References flnl_result::fr_error.

int flnl_result_get_nexthop_sel

(

struct flnl_result *

res

)

References flnl_result::fr_nh_sel.

int flnl_result_get_prefixlen

(

struct flnl_result *

res

)

References flnl_result::fr_prefixlen.

int flnl_result_get_scope

(

struct flnl_result *

res

)

References flnl_result::fr_scope.

int flnl_result_get_table_id

(

struct flnl_result *

res

)

References flnl_result::fr_table_id.

int flnl_result_get_type

(

struct flnl_result *

res

)

References flnl_result::fr_type.

void flnl_result_put

(

struct flnl_result *

res

)

References nl_object_put().

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