Network Names
The routines to map network names to numbers, and back return a netent structure:
/*
* Assumes that a network number fits in 32 bits.
*/
struct netent {
char *n_name; /* official name of net */
char **n_aliases; /* alias list */
int n_addrtype; /* net address type */
int n_net; /* net number, host byte order */
};
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getnetbyname(), getnetbyaddr(), and getnetent() are the network counterparts to the host routines described above.