$this->ip6[6] |= intval($ipv4blocks[1]);
$this->ip6[7] = intval($ipv4blocks[2]) << 8;
$this->ip6[7] |= intval($ipv4blocks[3]);
$this->ip6[6] |= intval($ipv4blocks[1]);
$this->ip6[7] = intval($ipv4blocks[2]) << 8;
$this->ip6[7] |= intval($ipv4blocks[3]);