int in_addr_from_string(int family, const char *s, union in_addr_union *ret);
int in_addr_from_string_auto(const char *s, int *family, union in_addr_union *ret);
unsigned in_addr_netmask_to_prefixlen(const struct in_addr *addr);
int in_addr_from_string(int family, const char *s, union in_addr_union *ret);
int in_addr_from_string_auto(const char *s, int *family, union in_addr_union *ret);
unsigned in_addr_netmask_to_prefixlen(const struct in_addr *addr);