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

Detailed Description

Abstraction layer for GNRC's network interfaces.

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

Modules
	CC1100/CC1100e/CC1101/CC1200 common code

	GNRC network interface configurations

	Generic network interface header

	Link-layer Broadcast deduplication
	Deduplicates broadcast link-layer packets best-effort style.

Files
file	gnrc_netif_xbee.h
	XBee adaption for Network interface API.

file	6lo.h
	6LoWPAN definitions for Network interface API

file	ethernet.h
	Ethernet adaption for Network interface API.

file	flags.h
	Flag definitions for Network interface API.

file	ieee802154.h
	IEEE 802.15.4 adaption for Network interface API.

file	ipv6.h
	IPv6 defintions for Network interface API.

file	mac.h
	Common MAC module definitions for Network interface API

file	raw.h
	Raw (i.e.

file	netif.h
	Definition for GNRC's network interfaces.

Data Structures
struct	gnrc_netif_t
	Representation of a network interface. More...

struct	gnrc_netif_ops

Typedefs
typedef struct gnrc_netif_ops	gnrc_netif_ops_t
	Operations to an interface.

Functions
gnrc_netif_t *	gnrc_netif_create (char stack, int stacksize, char priority, const char name, netdev_t dev, const gnrc_netif_ops_t ops)
	Creates a network interface. More...

unsigned	gnrc_netif_numof (void)
	Get number of network interfaces actually allocated. More...

gnrc_netif_t *	gnrc_netif_iter (const gnrc_netif_t *prev)
	Iterate over all network interfaces. More...

gnrc_netif_t *	gnrc_netif_get_by_pid (kernel_pid_t pid)
	Get network interface by PID. More...

static int	gnrc_netif_ipv6_addrs_get (const gnrc_netif_t netif, ipv6_addr_t addrs, size_t max_len)
	Gets the (unicast on anycast) IPv6 addresss of an interface (if IPv6 is supported) More...

static int	gnrc_netif_ipv6_addr_add (const gnrc_netif_t netif, ipv6_addr_t addr, unsigned pfx_len, uint8_t flags)
	Adds an (unicast or anycast) IPv6 address to an interface (if IPv6 is supported) More...

static int	gnrc_netif_ipv6_addr_remove (const gnrc_netif_t netif, ipv6_addr_t addr)
	Removes a (unicast or anycast) IPv6 address from an interface (if IPv6 is supported) More...

static int	gnrc_netif_ipv6_groups_get (const gnrc_netif_t netif, ipv6_addr_t groups, size_t max_len)
	Gets the IPv6 multicast groups an interface is joined to (if IPv6 is supported) More...

static int	gnrc_netif_ipv6_group_join (const gnrc_netif_t netif, ipv6_addr_t group)
	Joins an IPv6 multicast group on an interface (if IPv6 is supported) More...

static int	gnrc_netif_ipv6_group_leave (const gnrc_netif_t netif, ipv6_addr_t group)
	Leaves an IPv6 multicast group on an interface (if IPv6 is supported) More...

int	gnrc_netif_get_from_netdev (gnrc_netif_t netif, gnrc_netapi_opt_t opt)
	Default operation for gnrc_netif_ops_t::get() More...

int	gnrc_netif_set_from_netdev (gnrc_netif_t netif, const gnrc_netapi_opt_t opt)
	Default operation for gnrc_netif_ops_t::set() More...

char *	gnrc_netif_addr_to_str (const uint8_t addr, size_t addr_len, char out)
	Converts a hardware address to a human readable string. More...

size_t	gnrc_netif_addr_from_str (const char str, uint8_t out)
	Parses a string of colon-separated hexadecimals to a hardware address. More...

Function Documentation

◆ gnrc_netif_addr_from_str()

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

Parses a string of colon-separated hexadecimals to a hardware address.

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

Precondition: (out != NULL); out MUST have allocated at least GNRC_NETIF_L2ADDR_MAXLEN bytes.

Parameters

[in]	str	A string of colon-separated hexadecimals.
[out]	out	The resulting hardware address. Must at least have GNRC_NETIF_L2ADDR_MAXLEN bytes allocated.

Returns: Actual length of out on success.; 0, on failure.

◆ gnrc_netif_addr_to_str()

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

Converts a hardware address to a human readable string.

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

Precondition: (out != NULL) && ((addr != NULL) || (addr_len == 0)); out MUST have allocated at least 3 * addr_len bytes.

Parameters

[in]	addr	A hardware address.
[in]	addr_len	Length of `addr`.
[out]	out	A string to store the output in. Must at least have 3 * `addr_len` bytes allocated.

Returns: out.

◆ gnrc_netif_create()

gnrc_netif_t* gnrc_netif_create	(	char *	stack,
		int	stacksize,
		char	priority,
		const char *	name,
		netdev_t *	dev,
		const gnrc_netif_ops_t *	ops
	)

Creates a network interface.

Parameters

[in]	stack	The stack for the network interface's thread.
[in]	stacksize	Size of `stack`.
[in]	priority	Priority for the network interface's thread.
[in]	name	Name for the network interface. May be NULL.
[in]	dev	Device for the interface.
[in]	ops	Operations for the network interface.

Note: If DEVELHELP is defined netif_params_t::name is used as the name of the network interface's thread.

Attention: Fails and crashes (assertion error with DEVELHELP or segmentation fault without) if GNRC_NETIF_NUMOF is lower than the number of calls to this function.

Returns: The network interface on success.

◆ gnrc_netif_get_by_pid()

gnrc_netif_t* gnrc_netif_get_by_pid ( kernel_pid_t pid )

Get network interface by PID.

Parameters

[in] pid A PID of a network interface.

Returns: The network interface on success.; NULL, if no network interface with PID exists.

◆ gnrc_netif_get_from_netdev()

int gnrc_netif_get_from_netdev	(	gnrc_netif_t *	netif,
		gnrc_netapi_opt_t *	opt
	)

Default operation for gnrc_netif_ops_t::get()

Note: Can also be used to be called after a custom operation.

Parameters

[in]	netif	The network interface.
[out]	opt	The option parameters.

Returns: Return value of netdev_driver_t::get() of gnrc_netif_t::dev of netif.

◆ gnrc_netif_ipv6_addr_add()

static int gnrc_netif_ipv6_addr_add	(	const gnrc_netif_t *	netif,
		ipv6_addr_t *	addr,
		unsigned	pfx_len,
		uint8_t	flags
	)

inlinestatic

Adds an (unicast or anycast) IPv6 address to an interface (if IPv6 is supported)

Precondition: netif != NULL; addr != NULL; (pfx_len > 0) && (pfx_len <= 128)

Parameters

[in]	netif	The interface. May not be `NULL`.
[in]	addr	The address to add to `netif`. May not be `NULL`.
[in]	pfx_len	The prefix length of `addr`. Must be greater than 0 and lesser than or equal to 128.
[in]	flags	Flags for `addr`. Set GNRC_NETIF_IPV6_ADDRS_FLAGS_STATE_VALID to skip duplicate address detection (when activated).

Returns: sizeof(ipv6_addr_t) on success.; -ENOMEM, if no space is left on netif to add addr or its corresponding solicited-nodes multicast address.; -ENOTSUP, if netif doesn't support IPv6.

Definition at line 326 of file netif.h.

◆ gnrc_netif_ipv6_addr_remove()

static int gnrc_netif_ipv6_addr_remove	(	const gnrc_netif_t *	netif,
		ipv6_addr_t *	addr
	)

inlinestatic

Removes a (unicast or anycast) IPv6 address from an interface (if IPv6 is supported)

Precondition: netif != NULL; addr != NULL

Parameters

[in]	netif	The interface. May not be `NULL`.
[in]	addr	The address to remove from `netif`. May not be `NULL`.

Returns: sizeof(ipv6_addr_t) on success.; -ENOTSUP, if netif doesn't support IPv6.

Definition at line 351 of file netif.h.

◆ gnrc_netif_ipv6_addrs_get()

static int gnrc_netif_ipv6_addrs_get	(	const gnrc_netif_t *	netif,
		ipv6_addr_t *	addrs,
		size_t	max_len
	)

inlinestatic

Gets the (unicast on anycast) IPv6 addresss of an interface (if IPv6 is supported)

Precondition: netif != NULL; addrs != NULL; max_len >= sizeof(ipv6_addr_t)

Parameters

[in]	netif	The interface. May not be `NULL`.
[out]	addrs	Up to the first `max_len / sizeof(ipv6_addr_t)` addresses assigned to `netif`. May not be `NULL`
[in]	max_len	Number of bytes available in `addrs`. Must be at least `sizeof(ipv6_addr_t)`. It is recommended to use `GNRC_NETIF_IPV6_ADDRS_NUMOF` `* sizeof(ipv6_addr_t) here (and have `addrs` of the according length).

Returns: Number of addresses in addrs times sizeof(ipv6_addr_t) on success (including 0).; -ENOTSUP, if netif doesn't support IPv6.

Definition at line 295 of file netif.h.

◆ gnrc_netif_ipv6_group_join()

static int gnrc_netif_ipv6_group_join	(	const gnrc_netif_t *	netif,
		ipv6_addr_t *	group
	)

inlinestatic

Joins an IPv6 multicast group on an interface (if IPv6 is supported)

Precondition: netif != NULL; group != NULL

Parameters

[in]	netif	The interface.
[in]	group	The address of the multicast group to join on `netif`. May not be `NULL`.

Returns: sizeof(ipv6_addr_t) on success.; -ENOMEM, if no space is left on netif to add group.; -ENOTSUP, if netif doesn't support IPv6.

Definition at line 404 of file netif.h.

◆ gnrc_netif_ipv6_group_leave()

static int gnrc_netif_ipv6_group_leave	(	const gnrc_netif_t *	netif,
		ipv6_addr_t *	group
	)

inlinestatic

Leaves an IPv6 multicast group on an interface (if IPv6 is supported)

Precondition: netif != NULL; group != NULL

Parameters

[in]	netif	The interface.
[in]	group	The address of the multicast group to leave on `netif`. May not be `NULL`.

Returns: sizeof(ipv6_addr_t) on success.; -ENOTSUP, if netif doesn't support IPv6.

Definition at line 426 of file netif.h.

◆ gnrc_netif_ipv6_groups_get()

static int gnrc_netif_ipv6_groups_get	(	const gnrc_netif_t *	netif,
		ipv6_addr_t *	groups,
		size_t	max_len
	)

inlinestatic

Gets the IPv6 multicast groups an interface is joined to (if IPv6 is supported)

Precondition: netif != NULL; groups != NULL; max_len >= sizeof(ipv6_addr_t)

Parameters

[in]	netif	The interface. May not be `NULL`.
[out]	groups	Up to the first `max_len / 8` multicast groups `netif` is joined to. May not be `NULL`
[in]	max_len	Number of bytes available in `groups`. Must be at least `sizeof(ipv6_addr_t)`. It is recommended to use `GNRC_NETIF_IPV6_GROUPS_NUMOF` `* sizeof(ipv6_addr_t) here (and have `groups` of the according length).

Returns: Number of addresses in groups times sizeof(ipv6_addr_t) on success (including 0).; -ENOTSUP, if netif doesn't support IPv6.

Definition at line 380 of file netif.h.

◆ gnrc_netif_iter()

gnrc_netif_t* gnrc_netif_iter ( const gnrc_netif_t * prev )

Iterate over all network interfaces.

Parameters

[in] prev previous interface in iteration. NULL to start iteration.

Returns: The next network interface after prev.; NULL, if prev was the last network interface.

◆ gnrc_netif_numof()

unsigned gnrc_netif_numof ( void )

Get number of network interfaces actually allocated.

Returns: Number of network interfaces actually allocated

◆ gnrc_netif_set_from_netdev()

int gnrc_netif_set_from_netdev	(	gnrc_netif_t *	netif,
		const gnrc_netapi_opt_t *	opt
	)

Default operation for gnrc_netif_ops_t::set()

Note: Can also be used to be called after a custom operation.

Parameters

[in]	netif	The network interface.
[in]	opt	The option parameters.

Returns: Return value of netdev_driver_t::set() of gnrc_netif_t::dev of netif.

Detailed Description

Modules

Files

Data Structures

Typedefs

Functions

Function Documentation

◆ gnrc_netif_addr_from_str()

◆ gnrc_netif_addr_to_str()

◆ gnrc_netif_create()

◆ gnrc_netif_get_by_pid()

◆ gnrc_netif_get_from_netdev()

◆ gnrc_netif_ipv6_addr_add()

◆ gnrc_netif_ipv6_addr_remove()

◆ gnrc_netif_ipv6_addrs_get()

◆ gnrc_netif_ipv6_group_join()

◆ gnrc_netif_ipv6_group_leave()

◆ gnrc_netif_ipv6_groups_get()

◆ gnrc_netif_iter()

◆ gnrc_netif_numof()

◆ gnrc_netif_set_from_netdev()