I have a question on socket close(). I want to be able to keep track of socket related information as sockets are created and destroyed. One way I can do is to interpose bind() and connect() system calls so that I can add them to my table. Then I keep track of shutdown() to delete the given socket information. FYI, I use socket descriptor as an index of my table. Now one problem is that I do not know if the given file descriptor is socket descriptor when the user calls close() system call. I suppose there is a way but I think that it may be too expensive to check out all the file descriptor when close() is called. Is there any nice way I can know when the socket is closed? Please give me some advice. Thank you very much.
I found an answer by myself. But I thought that it could benefit someone so I would like to post the answer that I found. if (current->files->fd[fd]->f_dentry->d_inode->i_sb->s_magic == SOCKFS_MAGIC) Please also advise me if you have any better solution. Thanks. Ilho <>< --
