Ethernet Bridging API

Ethernet Bridging API. More...

Data Structures
struct	eth_bridge_iface_context
struct	eth_bridge_listener

Macros
#define	ETH_BRIDGE_INIT(name)
	Statically define and initialize a bridge instance.

Typedefs
typedef void(*	eth_bridge_cb_t) (struct eth_bridge *br, void *user_data)
	Callback used while iterating over bridge instances.

Functions
int	eth_bridge_iface_add (struct eth_bridge *br, struct net_if *iface)
	Add an Ethernet network interface to a bridge.
int	eth_bridge_iface_remove (struct eth_bridge *br, struct net_if *iface)
	Remove an Ethernet network interface from a bridge.
int	eth_bridge_iface_allow_tx (struct net_if *iface, bool allow)
	Enable/disable transmission mode for a bridged interface.
int	eth_bridge_listener_add (struct eth_bridge *br, struct eth_bridge_listener *l)
	Add (register) a listener to the bridge.
int	eth_bridge_listener_remove (struct eth_bridge *br, struct eth_bridge_listener *l)
	Remove (unregister) a listener from the bridge.
int	eth_bridge_get_index (struct eth_bridge *br)
	Get bridge index according to pointer.
struct eth_bridge *	eth_bridge_get_by_index (int index)
	Get bridge instance according to index.
void	net_eth_bridge_foreach (eth_bridge_cb_t cb, void *user_data)
	Go through all the bridge instances in order to get information about them.

Detailed Description

Ethernet Bridging API.

Macro Definition Documentation

ETH_BRIDGE_INIT

#define ETH_BRIDGE_INIT

(

name

)

#include <zephyr/net/ethernet_bridge.h>

Value:

        STRUCT_SECTION_ITERABLE(eth_bridge, name) = \
                ETH_BRIDGE_INITIALIZER(name)

Statically define and initialize a bridge instance.

Parameters

name	Name of the bridge object

Typedef Documentation

eth_bridge_cb_t

eth_bridge_cb_t

#include <zephyr/net/ethernet_bridge.h>

Callback used while iterating over bridge instances.

Parameters

br	Pointer to bridge instance
user_data	User supplied data

Function Documentation

eth_bridge_get_by_index()

struct eth_bridge * eth_bridge_get_by_index

(

int

index

)

#include <zephyr/net/ethernet_bridge.h>

Get bridge instance according to index.

Parameters

index

Bridge instance index

Returns

Pointer to bridge instance or NULL if not found.

eth_bridge_get_index()

int eth_bridge_get_index

(

struct eth_bridge *

br

)

#include <zephyr/net/ethernet_bridge.h>

Get bridge index according to pointer.

Parameters

br	Pointer to bridge instance

Returns

Bridge index

eth_bridge_iface_add()

int eth_bridge_iface_add	(	struct eth_bridge *	br,
		struct net_if *	iface
	)

#include <zephyr/net/ethernet_bridge.h>

Add an Ethernet network interface to a bridge.

This adds a network interface to a bridge. The interface is then put into promiscuous mode, all packets received by this interface are sent to the bridge, and any other packets sent to the bridge (with some exceptions) are transmitted via this interface.

For transmission from the bridge to occur via this interface, it is necessary to enable TX mode with eth_bridge_iface_tx(). TX mode is initially disabled.

Once an interface is added to a bridge, all its incoming traffic is diverted to the bridge. However, packets sent out with net_if_queue_tx() via this interface are not subjected to the bridge.

Parameters

br	A pointer to an initialized bridge object
iface	Interface to add

Returns

0 if OK, negative error code otherwise.

eth_bridge_iface_allow_tx()

int eth_bridge_iface_allow_tx	(	struct net_if *	iface,
		bool	allow
	)

#include <zephyr/net/ethernet_bridge.h>

Enable/disable transmission mode for a bridged interface.

When TX mode is off, the interface may receive packets and send them to the bridge but no packets coming from the bridge will be sent through this interface. When TX mode is on, both incoming and outgoing packets are allowed.

Parameters

iface	Interface to configure
allow	true to activate TX mode, false otherwise

Returns

0 if OK, negative error code otherwise.

eth_bridge_iface_remove()

int eth_bridge_iface_remove	(	struct eth_bridge *	br,
		struct net_if *	iface
	)

#include <zephyr/net/ethernet_bridge.h>

Remove an Ethernet network interface from a bridge.

Parameters

br	A pointer to an initialized bridge object
iface	Interface to remove

Returns

0 if OK, negative error code otherwise.

eth_bridge_listener_add()

int eth_bridge_listener_add	(	struct eth_bridge *	br,
		struct eth_bridge_listener *	l
	)

#include <zephyr/net/ethernet_bridge.h>

Add (register) a listener to the bridge.

This lets a software listener register a pointer to a provided FIFO for receiving packets sent to the bridge. The listener is responsible for emptying the FIFO with k_fifo_get() which will return a struct net_pkt pointer, and releasing the packet with net_pkt_unref() when done with it.

The listener wishing not to receive any more packets should simply unregister itself with eth_bridge_listener_remove().

Parameters

br	A pointer to an initialized bridge object
l	A pointer to an initialized listener instance.

Returns

0 if OK, negative error code otherwise.

eth_bridge_listener_remove()

int eth_bridge_listener_remove	(	struct eth_bridge *	br,
		struct eth_bridge_listener *	l
	)

#include <zephyr/net/ethernet_bridge.h>

Remove (unregister) a listener from the bridge.

Parameters

br	A pointer to an initialized bridge object
l	A pointer to the listener instance to be removed.

Returns

0 if OK, negative error code otherwise.

net_eth_bridge_foreach()

void net_eth_bridge_foreach	(	eth_bridge_cb_t	cb,
		void *	user_data
	)

#include <zephyr/net/ethernet_bridge.h>

Go through all the bridge instances in order to get information about them.

This is mainly useful in net-shell to print data about currently active bridges.

Parameters

cb	Callback to call for each bridge instance
user_data	User supplied data