Re: socket write(2) after remote shutdown(2) problem ?

[David S. Miller]

   From: Stelian Pop <[e-mail]>
   Date: Fri, 5 Apr 2002 12:55:09 +0200
   
   > 	* client socket receives a TCP reset
   
   How is the client socket supposed to know it received a TCP reset
   (I am talking from the application point of view, not the kernel...) ?

You may find out by attempting to read data, or you may use the
extended IP error reporting Linux has.

But all of this is irrelevant.  When a server closes and says "send me
no more data", this implies that the server told the client it doesn't
want any more data.  If the client sends data, this is a gross fatal
error, so TCP resets in FIN_WAIT{1,2} states.

RFC 793 originally specified to queue the data, RFC 1122 is where
the current behavior is defined.