Forcing TCP sockets to close ?

[jj at lcs.mit.edu (John Jannotti)]

The TCP standard mandates that sockets stay in CLOSE_WAIT for about 2
minutes after close in order to avoid reusing that port and causing
confusion between packets from the old and new connection.  If you
want to avoid this "feature", use something like this:

int  i = 1;
if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i)) < 0)
    perror("setsockopt");

before you bind s.

  jj

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