What exactly does SO_KEEPALIVE do?
- 1 Answers
- 1450 Views
- I also Faced
- E-Mail Answers
Answer / chaitanya
The SO_KEEPALIVE option causes a packet (called a 'keepalive probe') to be sent to the remote system if a long time (by default, more than 2 hours) passes with no other data being sent or received. This packet is designed to provoke an ACK response from the peer. This enables detection of a peer which has become unreachable (e.g. powered off or disconnected from the net).
Note that the figure of 2 hours comes from RFC1122, "Requirements for Internet Hosts". The precise value should be configurable, but I've often found this to be difficult. The only implementation I know of that allows the keepalive interval to be set per-connection is SVR4.2.
| Is This Answer Correct ? | 0 Yes | 0 No |
What does af mean in sockets?
What's the difference between impact sockets and regular sockets?
How do I properly close a socket?
Why do we need sockets?
How would I put my socket in non-blocking mode?
How to find other end of unix socket connection?
Is a socket a file?
How can I tell when a socket is closed on the other end?
What is socket programming in java?
What is active unix domain sockets?
How come select says there is data, but read returns zero?
Why does the sockets buffer fill up sooner than expected?
Unix Commands 
