Transport protocols and bulk file transfer

[Steven Senger <>]

On Feb 24, 2005, at 10:16 PM, Yunhong Gu wrote:

> int x_setsockopt
>
> "QTTL int msec after which data will be retransmitted"
>
> Maybe I missed something but I wonder why TTL is used to do the
> retransmission. I think usually RTO is used to do this and it 
> shouldn't be
> set by applications.

My mistake. I omitted a word. This is intended to refer to the timed 
partial reliability service. I called it TTL just because SCTP uses 
that name. It is intended to be the time in queue after which data will 
_not_ be retransmitted.

> int x_sockerror(X_SOCKET skt)
>
> I think the parameter "skt" is not very useful because the error is
> always checked right after a socket function is called. For example, on
> *nix "errno" is used; on Windows "GetLastError()" or 
> "WSAGetLastError()"
> is used. Those global variable or functions simply record the most 
> recent
> error.

I'll change it.