🎉 initiate project *astro_rewrite*

node_modules/shiki/samples/fsl.sample

@@ -0,0 +1,47 @@
+
+machine_name      : "TCP/IP";
+machine_reference : "http://www.texample.net/tikz/examples/tcp-state-machine/";
+machine_version   : 1.0.0;
+
+machine_author    : "John Haugeland <stonecypher@gmail.com>";
+machine_license   : MIT;
+
+jssm_version      : >= 5.0.0;
+
+
+
+Closed 'Passive open'      -> Listen;
+Closed 'Active Open / SYN' -> SynSent;
+
+Listen 'Close'         -> Closed;
+Listen 'Send / SYN'    -> SynSent;
+Listen 'SYN / SYN+ACK' -> SynRcvd;
+
+SynSent 'Close'         -> Closed;
+SynSent 'SYN / SYN+ACK' -> SynRcvd;
+SynSent 'SYN+ACK / ACK' -> Established;
+
+SynRcvd 'Timeout / RST' -> Closed;
+SynRcvd 'Close / FIN'   -> FinWait1;
+SynRcvd 'ACK'           -> Established;
+
+Established 'Close / FIN' -> FinWait1;
+Established 'FIN / ACK'   -> CloseWait;
+
+FinWait1 'FIN / ACK'     -> Closing;  // the source diagram has this action wrong
+FinWait1 'FIN+ACK / ACK' -> TimeWait;
+FinWait1 'ACK / Nothing' -> FinWait2; // see http://www.cs.odu.edu/~cs779/spring17/lectures/architecture_files/image009.jpg
+
+FinWait2 'FIN / ACK' -> TimeWait;
+
+Closing 'ACK' -> TimeWait;
+
+TimeWait 'Up to 2*MSL' -> Closed;
+
+CloseWait 'Close / FIN' -> LastAck;
+
+LastAck 'ACK' -> Closed;
+
+
+
+# From https://github.com/StoneCypher/jssm/blob/main/src/machines/linguist/tcp%20ip.fsl