Get the hardware address corresponding to a specific ARP cache’s protocol address.
Files
net_arp.h/net_arp.c
Prototype
Arguments
p_addr_hw
Pointer to a memory buffer that will receive the hardware address:
Hardware address that corresponds to the desired protocol address, if no errors; hardware address cleared to all zeros, otherwise.
addr_hw_len_buf
Size of hardware address memory buffer (in bytes).
p_addr_protocol
Pointer to the specific protocol address.
addr_protocol_len
Length of protocol address (in bytes).
p_err
Pointer to variable that will receive the error code from this function:
NET_ARP_ERR_NONE
NET_ARP_ERR_NULL_PTR
NET_ARP_ERR_INVALID_HW_ADDR_LEN
NET_ARP_ERR_INVALID_PROTOCOL_ADDR_LEN
NET_ARP_ERR_CACHE_NOT_FOUND
NET_ARP_ERR_CACHE_PEND
Returned Value
Length of returned hardware address, if available;
0, otherwise.
Required Configuration
Available only if IPv4 is enabled, see IPv4 Layer Configuration
Notes / Warnings
NetARP_CacheGetAddrHW() may be used in conjunction with NetARP_ProbeAddrOnNet() to determine if a specific protocol address is available on the local network.