MATCH_FAMILY
if (!MATCH_FAMILY(pai->ai_family, ex->e_af,
if (MATCH_FAMILY(pai->ai_family, PF_INET, 1)
|| MATCH_FAMILY(pai->ai_family, PF_INET6, 1)
if (!MATCH_FAMILY(pai->ai_family, afd->a_af, 1))
if (!MATCH_FAMILY(pai->ai_family, ex->e_af, WILD_AF(ex)))