Namespaces

Variants
Actions

Please note that as of October 24, 2014, the Nokia Developer Wiki will no longer be accepting user contributions, including new entries, edits and comments, as we begin transitioning to our new home, in the Windows Phone Development Wiki. We plan to move over the majority of the existing entries over the next few weeks. Thanks for all your past and future contributions.

Open C Sockets: getsockopt, setsockopt method

From Wiki
Jump to: navigation, search
Article Metadata
Article
Created: polaka_sr (17 Jun 2008)
Last edited: hamishwillee (27 Jul 2012)

The getsockopt, setsockopt methods gets and sets options on sockets.

int getsockopt (int s, int level, int optname, void * restrict optval, 
socklen_t * restrict optlen);
 
int setsockopt (int s, int level, int optname, const void *optval, socklen_t optlen);

The getsockopt and setsockopt system calls manipulate the options associated with a socket. Options may exist at multiple protocol levels; they are always present at the uppermost "socket" level.

Following is the usage of getsockopt and setsockopt system calls:

#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h>
void SocketOptions()
{
int sock_fd;
int optval = 1;
unsigned int optlen = sizeof(optval);
int rdoptval;
sock_fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
setsockopt(sock_fd,SOL_SOCKET,SO_KEEPALIVE,&optval,optlen);
getsockopt(sock_fd,SOL_SOCKET,SO_KEEPALIVE,(void*)&rdoptval,&optlen);
close(sock_fd);
}

Wiki Links

Open C Sockets Overview

This page was last modified on 27 July 2012, at 04:18.
46 page views in the last 30 days.

Was this page helpful?

Your feedback about this content is important. Let us know what you think.

 

Thank you!

We appreciate your feedback.

×