Given node and service, which identify an Internet host and a service,
getaddrinfo() returns one or more addrinfo structures, each of which
contains an Internet address that can be specified in a call to bind
or connect. The getaddrinfo() function combines the functionality
provided by the getservbyname and getservbyport functions into a single
interface, but unlike the latter functions, getaddrinfo() is reentrant
and allows programs to eliminate IPv4-versus-IPv6 dependencies.(C) MAN
Given node and service, which identify an Internet host and a service, getaddrinfo() returns one or more addrinfo structures, each of which contains an Internet address that can be specified in a call to bind or connect. The getaddrinfo() function combines the functionality provided by the getservbyname and getservbyport functions into a single interface, but unlike the latter functions, getaddrinfo() is reentrant and allows programs to eliminate IPv4-versus-IPv6 dependencies.(C) MAN