The containing class is available as OS\sockaddr_in6 in the www repository.
Construct an instance
public function __construct(
int $port,
int $flowInfo,
HH\Lib\OS\in6_addr $address,
int $scopeID,
);
Unlike the C API, all integers are in host byte order.
int $portint $flowInfoHH\Lib\OS\in6_addr $addressint $scopeID