Mapping protocol names (Internet domain)

For protocols, the protoent structure defines the protocol name mapping used with the routines getnetent(SLIB) and getprotoent(SLIB):

struct  protoent {
        char       *p_name;
        char      **p_aliases;
        int         p_proto;
        }

*p_name

is the official protocol name.

**p_aliases

is the alias list

p_proto

is the protocol number.