Fnet_arp

ARP cache entry information structure.

See also:

fnet_arp_get_entry()

Retrieves ARP cache entry of the specified network interface.

Parameters:

[in]	netif_desc	Network interface descriptor.
[in]	n	Sequence number of ARP cache entry to retrieve (from 0).
[out]	entry_info	Pointer to the ARP cache entry information structure will contain the result.

Returns:

This function returns:

• FNET_TRUE if no error occurs and data structure is filled.
• FNET_FALSE in case of error or n-th entry is not available.

This function is used to retrieve ARP cache entries assigned the given interface.

Gets MAC address of valid ARP cache entry.

Parameters:

[in]	netif_desc	Network interface descriptor.
[in]	ip_addr	IPv4 address to search for.
[out]	mac_addr	Buffer will contain a MAC address corresponding ipaddr. This parameter is optional.

Returns:

This function returns:

• FNET_TRUE if no error occurs and entry corresponding to ip_addr exists.
• FNET_FALSE in case of error or entry corresponding to ip_addr does not exist.

This function searches for an entry corresponding to the provided IPv4 address.
If mac_addr parameter is present, it will contain a valid MAC address corresponding to ip_addr.

Sends ARP request.

Parameters:

[in]	netif_desc	Network interface descriptor.
[in]	ip_addr	Target protocol address.

This function sends a broadcast ARP message, requesting an answer for ipaddr.
It can be used for ARP probing of IPv4 address before beginning to use.
Also, it can be used for a gratuitous ARP message when sender's IP address or MAC address has changed.