af
    Specifies the address family. Valid values are AF_INET for an
    IPv4 address and AF_INET6 for an IPv6 address.
 src
    Points to a buffer that contains the numeric IP address.
 dst
    Points to a buffer that is to contain the text string.
 size
    Specifies the size of the buffer pointed to by the dst parameter.
    For IPv4 addresses, the minimum buffer size is 16 bytes. For IPv6
    addresses, the minimum buffer size is 46 bytes. INET_ADDRSTRLEN
    constants are defined in the IN.H header file. INET6_ADDRSTRLEN
    constants are defined in IN6.H.