Onload TCP supports the following TCP options which can be used in the setsockopt() and getsockopt() function calls
| Option | Description |
|---|---|
TCP_CORK
|
Stops sends on segments less than MSS size until the connection is uncorked. |
TCP_DEFER_ACCEPT
|
A connection is ESTABLISHED after handshake is complete instead of leaving it in SYN-RECV until the first real data packet arrives. The connection is placed in the accept queue when the first data packet arrives. |
TCP_INFO
|
Populates an internal data structure with tcp statistic values. |
TCP_KEEPALIVE_ABORT_THRESHOLD
|
How long to try to produce a successful keepalive before giving up. |
TCP_KEEPALIVE_THRESHOLD
|
Specifies the idle time for keepalive timers. |
TCP_KEEPCNT
|
Number of keepalives before giving up. |
TCP_KEEPIDLE
|
Idle time for keepalives. |
TCP_KEEPINTVL
|
Time between keepalives. |
TCP_MAXSEG
|
Gets the MSS size for this connection. |
TCP_NODELAY
|
Disables Nagle’s Algorithm and small segments are sent without delay and without waiting for previous segments to be acknowledged. |
TCP_QUICKACK
|
When enabled ACK messages are sent immediately following reception of the next data packet. This flag will be reset to zero following every use. It is a one time option. New connections start in a mode where all packets are acknowledged, and so this value initially defaults to 1. |