The code uses sockets but to exploit a bug in socket filter code within the kernel which leaks some data from the kernel stack (which can be used to do interesting stuff later on, but the post doesn't state what).
The comment states exploit is executed on the target machine after he already exploited a bugged ftp server on it, but it's stuck with the priviledges of the ftp server process and wonder what to do next.
The code uses sockets but to exploit a bug in socket filter code within the kernel which leaks some data from the kernel stack (which can be used to do interesting stuff later on, but the post doesn't state what).
The comment states exploit is executed on the target machine after he already exploited a bugged ftp server on it, but it's stuck with the priviledges of the ftp server process and wonder what to do next.