Network interfaces

Abstraction layer for GNRC's network interfaces. More...

Detailed Description

Network interfaces in the context of GNRC are threads for protocols that are below the network layer.

Modules
	Generic network interface header

Files
file	netif.h
	Definitions for GNRC's network interfaces.

Data Structures
struct	gnrc_netif_handler_t
	The add and remove handlers to set network layer protocol specific options for an interface. More...

Macros
#define	GNRC_NETIF_NUMOF   (1)
	Maximum number of network interfaces.

Typedefs
typedef void(*	gnrc_netif_op_t) (kernel_pid_t pid)
	The add/remove operation to set network layer protocol specific options for an interface. More...

Functions
void	gnrc_netif_init (void)
	Initializes module.
int	gnrc_netif_add (kernel_pid_t pid)
	Adds a thread as interface. More...
void	gnrc_netif_remove (kernel_pid_t pid)
	Removes a thread as interface. More...
size_t	gnrc_netif_get (kernel_pid_t *netifs)
	Get all active interfaces. More...
bool	gnrc_netif_exist (kernel_pid_t pid)
	Check if an interface exist. More...
char *	gnrc_netif_addr_to_str (char *out, size_t out_len, const uint8_t *addr, size_t addr_len)
	Converts a hardware address to a human readable string. More...
size_t	gnrc_netif_addr_from_str (uint8_t *out, size_t out_len, const char *str)
	Parses a string of colon-separated hexadecimals to a hardware address. More...

Typedef Documentation

gnrc_netif_op_t

typedef void(* gnrc_netif_op_t) (kernel_pid_t pid)

Parameters

[in]

pid

The PID to the new interface.

Definition at line 49 of file netif.h.

Function Documentation

gnrc_netif_add()

int gnrc_netif_add

(

kernel_pid_t

pid

)

Parameters

[in]

pid

PID of the added thread.

Returns

0, on success,

-ENOMEM, if maximum number of interfaces has been exceeded.

gnrc_netif_addr_from_str()

size_t gnrc_netif_addr_from_str	(	uint8_t *	out,
		size_t	out_len,
		const char *	str
	)

The input format must be like xx:xx:xx:xx where xx will be the bytes of addr in hexadecimal representation.

Parameters

[out]	out	The resulting hardware address.
[out]	out_len	Length of out.
[in]	str	A string of colon-separated hexadecimals.

Returns

Actual length of out on success.

0, on failure.

gnrc_netif_addr_to_str()

char* gnrc_netif_addr_to_str	(	char *	out,
		size_t	out_len,
		const uint8_t *	addr,
		size_t	addr_len
	)

The format will be like xx:xx:xx:xx where xx are the bytes of addr in hexadecimal representation.

Precondition

out_len >= 3 * addr_len

Parameters

[out]	out	A string to store the output in.
[out]	out_len	Length of out. Must be at least 3 * addr_len long.
[in]	addr	A hardware address.
[in]	addr_len	Length of addr.

Returns

Copy of out on success.

NULL, if out_len < 3 * addr_len.

gnrc_netif_exist()

bool gnrc_netif_exist

(

kernel_pid_t

pid

)

Parameters

[in]

pid

The PID to be checked.

Returns

True, if an interface pid exists.

False, otherwise

gnrc_netif_get()

size_t gnrc_netif_get

(

kernel_pid_t *

netifs

)

Parameters

[out]

netifs

List of all active interfaces. There is no order ensured. It must at least fit GNRC_NETIF_NUMOF elements.

Returns

The number of active interfaces.

gnrc_netif_remove()

void gnrc_netif_remove

(

kernel_pid_t

pid

)

Parameters

[in]

pid

PID of the removed thread.