Why do we use Setsockopt?

Table of Contents

The setsockopt() function provides an application program with the means to control socket behavior. An application program can use setsockopt() to allocate buffer space, control timeouts, or permit socket data broadcasts.

What does close do in socket programming?

The close function shuts down the socket associated with socket descriptor s, and frees resources allocated to the socket. If s refers to an open TCP connection, the connection is closed. If a stream socket is closed when there is input data queued, the TCP connection is reset rather than being cleanly closed.

What are the socket options?

Socket Options in Java

TCP_NODELAY. Disable Nagle’s algorithm.
SO_LINGER. Specify a linger-on-close timeout.
SO_TIMEOUT. Specify a timeout on blocking socket operations.
SO_BINDADDR. Fetch the local address binding of a socket.
SO_REUSEADDR. Enable reuse address for a socket.
SO_BROADCAST.
SO_SNDBUF.
SO_RCVBUF.

How do you gracefully close a socket?

How to Gracefully Close a Socket from the Server

socket Shutdown with the SocketShutdown. Send option.
loop/wait until a socket Receive returns with 0 bytes.
socket Close.

What is Setsockopt in socket programming?

Remarks. The setsockopt function sets the current value for a socket option associated with a socket of any type, in any state. Although options can exist at multiple protocol levels, they are always present at the uppermost socket level.

What is Ipproto_ip?

IPPROTO_IP creates a socket that sends/receives raw data for IPv4-based protocols (TCP, UDP, etc). It will handle the IP headers for you, but you are responsible for processing/creating additional protocol data inside the IP payload.

What are the differences between close and shutdown?

Generally the difference between close() and shutdown() is: close() closes the socket id for the process but the connection is still opened if another process shares this socket id. The connection stays opened both for read and write, and sometimes this is very important.

What is socket address structure?

The socket data structure defines the socket. During a socket subroutine, the system dynamically creates the socket data structure. The socket address is specified by a data structure that is defined in a header file.

When should I close a socket connection?

If socket refers to an open TCP connection, the connection is closed. If a stream socket is closed when there is input data queued, the TCP connection is reset rather than being cleanly closed. The descriptor of the socket to be closed. Note: All sockets should be closed before the end of your process.

What can happen if you do not close a socket when you finish using it?

One way or another, if you don’t close a socket, your program will leak a file descriptor. Programs can usually only open a limited number of file descriptors, so if this happens a lot, it may turn into a problem.

Why do we use Setsockopt?