A DESCRIPTION OF THE REQUEST :
In the case of UDP multicast sockets, we can set their TTL (Time-To-Live) by using MulticastSocket#setTimeToLive.
As for normal TCP/UDP sockets, we have no way to set the TTL, including SocketOptions#setOption, or SocketChannel#setOption with StandardSocketOption.

JUSTIFICATION :
The TTL setting functionality is mandatory for realizing network analyzing tools, and software using some specific protocol like DTCP-IP (TCP packets must have a TTL value equal to or less than 3).

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
I would like you to add either of the following:
- Socket#setTimeToLive and DatagramSocket#setTimeToLive methods,
- SocketOptions.IP_TTL field for SocketOptions#setOption, or
- StandardSocketOption.IP_TTL field for SocketChannel#setOption.