The GNU C Library - Networks Database Go to the first , previous , next , last section, table of contents .
Many systems come with a database that records a list of networks known to the system developer.
This data base is useful for routing programs such as route , but it is not useful for programs that simply communicate over the network. This data type is used to represent information about entries in the networks database. A null pointer terminates the array. This is the network number. Use the getnetbyname or getnetbyaddr functions to search the networks database for information about a specific network.