+
−% ipc-protocol
+
−
+
−\begin{verbatim}
+
−
+
− +---+ connect  +---+  0  +---+ send  +---+  0  +---+ send  +---+  0  +---+
+
− | B |--------->| W |---->|   |------>| W |---->|   |------>| W |---->| S |
+
− +---+ attempt  +---+     +---+ hdr   +---+     +---+ data  +---+     +---+
+
−                  |                     |                     |
+
−                  | 1                   | 1                   | 1
+
−                  V                     V                     V
+
−                +---+                 +---+                 +---+
+
−                | E |                 | E |                 | E |
+
−                +---+                 +---+                 +---+
+
−
+
−B: begin
+
−W: wait
+
−E: error
+
−S: success
+
−\end{verbatim}