Parses mask_string as an IP address and (optional) length, and creates a new #GInetAddressMask. The length, if present, is delimited by a "/". If it is not present, then the length is assumed to be the full length of the address.
an IP address or address/length string
a new #GInetAddressMask corresponding to string, or null on error.
Parses mask_string as an IP address and (optional) length, and creates a new #GInetAddressMask. The length, if present, is delimited by a "/". If it is not present, then the length is assumed to be the full length of the address.