Routing Rules
[Routing Netlink]

---

Function Documentation

struct nl_cache* rtnl_rule_alloc_cache_by_family	(	struct nl_handle *	handle,
		int	family
	)			[read]

Parameters:

	handle	netlink handle
	family	address family

Allocates a new rule cache, initializes it properly and updates it to include all rules of the specified address family currently configured in the kernel.

Note:

The caller is responsible for destroying and freeing the cache after using it. (nl_cache_destroy_and_free())

Returns:

The new cache or NULL if an error occured.

Definition at line 449 of file rule.c.

References nl_cache_alloc(), and nl_cache_refill().

Referenced by rtnl_rule_alloc_cache().

struct nl_cache* rtnl_rule_alloc_cache

(

struct nl_handle *

handle

)

[read]

Parameters:

handle

netlink handle

Allocates a new rule cache, initializes it properly and updates it to include all rules currently configured in the kernel.

Note:

The caller is responsible for destroying and freeing the cache after using it. (nl_cache_destroy_and_free())

Returns:

The new cache or NULL if an error occured.

Definition at line 479 of file rule.c.

References rtnl_rule_alloc_cache_by_family().

struct nl_msg* rtnl_rule_build_add_request	(	struct rtnl_rule *	tmpl,
		int	flags
	)			[read]

Parameters:

	tmpl	template with data of new rule
	flags	additional netlink message flags

Builds a new netlink message requesting a addition of a new rule. The netlink message header isn't fully equipped with all relevant fields and must thus be sent out via nl_send_auto_complete() or supplemented as needed. tmpl must contain the attributes of the new address set via rtnl_rule_set_* functions.

Returns:

The netlink message

Definition at line 564 of file rule.c.

References NLM_F_CREATE.

Referenced by rtnl_rule_add().

int rtnl_rule_add	(	struct nl_handle *	handle,
		struct rtnl_rule *	tmpl,
		int	flags
	)

Parameters:

	handle	netlink handle
	tmpl	template with requested changes
	flags	additional netlink message flags

Builds a netlink message by calling rtnl_rule_build_add_request(), sends the request to the kernel and waits for the next ACK to be received and thus blocks until the request has been fullfilled.

Returns:

0 on sucess or a negative error if an error occured.

Definition at line 581 of file rule.c.

References nl_send_auto_complete(), nl_wait_for_ack(), nlmsg_free(), and rtnl_rule_build_add_request().

struct nl_msg* rtnl_rule_build_delete_request	(	struct rtnl_rule *	rule,
		int	flags
	)			[read]

Parameters:

	rule	rule to delete
	flags	additional netlink message flags

Builds a new netlink message requesting a deletion of a rule. The netlink message header isn't fully equipped with all relevant fields and must thus be sent out via nl_send_auto_complete() or supplemented as needed. rule must point to an existing address.

Returns:

The netlink message

Definition at line 618 of file rule.c.

Referenced by rtnl_rule_delete().

int rtnl_rule_delete	(	struct nl_handle *	handle,
		struct rtnl_rule *	rule,
		int	flags
	)

Parameters:

	handle	netlink handle
	rule	rule to delete
	flags	additional netlink message flags

Builds a netlink message by calling rtnl_rule_build_delete_request(), sends the request to the kernel and waits for the next ACK to be received and thus blocks until the request has been fullfilled.

Returns:

0 on sucess or a negative error if an error occured.

Definition at line 635 of file rule.c.

References nl_send_auto_complete(), nl_wait_for_ack(), nlmsg_free(), and rtnl_rule_build_delete_request().