in demo_example/asio/asio/ip/impl/address_v6.ipp [153:163]
bool address_v6::is_unspecified() const ASIO_NOEXCEPT
{
return ((addr_.s6_addr[0] == 0) && (addr_.s6_addr[1] == 0)
&& (addr_.s6_addr[2] == 0) && (addr_.s6_addr[3] == 0)
&& (addr_.s6_addr[4] == 0) && (addr_.s6_addr[5] == 0)
&& (addr_.s6_addr[6] == 0) && (addr_.s6_addr[7] == 0)
&& (addr_.s6_addr[8] == 0) && (addr_.s6_addr[9] == 0)
&& (addr_.s6_addr[10] == 0) && (addr_.s6_addr[11] == 0)
&& (addr_.s6_addr[12] == 0) && (addr_.s6_addr[13] == 0)
&& (addr_.s6_addr[14] == 0) && (addr_.s6_addr[15] == 0));
}