See getaddrinfo(3) man page, that should be almost all you want. Making code mixed v4/v6 that way actually seems easier than v4-only solution with gethostbyname

See getaddrinfo(3) man page, that should be almost all you want. Making code mixed v4/v6 that way actually seems easier than v4-only solution with gethostbyname(3) and building struct sockaddr manually.