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Get Socket details from user space

Submitted by kskkumar
on August 16, 2005 - 7:23am

Hi, i am using 2.6v of kernel. I am interested in getting the socket details of a TCP connection. This i have to do inthe userspace without altering the kernel. Is there any system call for the same? I recently came across 'netlink' system call which is available for both user space and kernel space. If possible, can i have a simple code of how to get the TCP connection state from the kernel? Any online links U suggest for my area of interest? Expecting Ur reply thank U.

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getsockopt

strcmp
on
August 16, 2005 - 9:18am

According to tcp(7) (a very interesting man-page, together with ip(7)), one of the option level arguments of getsockupt() is:

TCP_INFO
Used to collect information about this socket. The kernel returns a struct tcp_info as defined in the file /usr/include/linux/tcp.h. This option should not be used in code intended to be portable.

Looking at the mentioned struct tcp_info, it seems to be full of interesting information. Is this, what you want?

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