Cleaner fix for issues #22,#33

Makefile

@@ -1,4 +1,4 @@
-VERSION := 0.9.5.2
+VERSION := 0.9.5.3
 .PHONY: lint vis clean common client server passwd subpkgs install uninstall reinstall
 
 ## Tag version of binaries with build info wrt.

xsd/xsd.go

@@ -327,16 +327,6 @@ func runShellAs(who, hname, ttype, cmd string, interactive bool, //nolint:funlen
 	// #gv:s/label=\"runShellAs\$1\"/label=\"deferPtmxClose\"/
 	defer func() {
 		//logger.LogDebug(fmt.Sprintf("[Exited process was %d]", c.Process.Pid))
-
-		//Ensure socket has sent all data to client prior to closing
-		//NOTE: This is not ideal, as it would be better to somehow
-		//determine if there is any pending outgoing (write) data to the
-		//underlying socket (TCP/KCP) prior to closing; however Go's net pkg
-		//completely hides lower-level stuff. net.Conn.Close() according to
-		//docs sends written data in the background, so how best to determine
-		//all data has been sent? -rlm 2022-10-04
-
-		time.Sleep(100 * time.Millisecond) //Empirically determined :^/
 		_ = ptmx.Close()
 	}()
 
@@ -869,9 +859,6 @@ func main() { //nolint:funlen,gocyclo
 							// Returned hopefully via an EOF or exit/logout;
 							logger.LogNotice(fmt.Sprintf("[s->c copy completed for %s@%s, status %d]\n", rec.Who(), hname, cmdStatus)) //nolint:errcheck
 						}
-						// HACK: Bug #22: (xc) Need to wait for rcvr to get final data
-						// TODO: Await specific msg from client to inform they have gotten all data from the tarpipe
-						time.Sleep(900 * time.Millisecond) //nolint:gomnd // Let rcvr set this on setup?
 
 						// Clear current op so user can enter next, or EOF
 						rec.SetOp([]byte{0})

xsnet/net.go

@@ -267,8 +267,6 @@ func _new(kexAlg KEXAlg, conn *net.Conn) (hc *Conn, e error) {
 	tempMap := make(map[uint16]*TunEndpoint)
 	hc.tuns = &tempMap
 
-	*hc.closeStat = CSEStillOpen // open or prematurely-closed status
-
 	// Set up KEx/KEM-specifics
 	switch kexAlg {
 	case KEX_HERRADURA256:
@@ -979,6 +977,19 @@ func (hc *Conn) Close() (err error) {
 	log.Printf("** Writing closeStat %d at Close()\n", *hc.closeStat)
 	//(*hc.c).SetWriteDeadline(time.Now().Add(500 * time.Millisecond))
 	hc.WritePacket(s, CSOExitStatus)
+
+	// HACK: Bug #22,#33: Need to wait for rcvr to get final data
+	// TODO: Find a way to explicitly check if any outgoing data is pending
+
+	//Ensure socket has sent all data to client prior to closing
+	//NOTE: This is not ideal, as it would be better to somehow
+	//determine if there is any pending outgoing (write) data to the
+	//underlying socket (TCP/KCP) prior to closing; however Go's net pkg
+	//completely hides lower-level stuff. net.Conn.Close() according to
+	//docs sends written data in the background, so how best to determine
+	//all data has been sent? -rlm 2022-10-04
+	time.Sleep(10 * time.Millisecond) //nolint:gomnd
+
 	err = (*hc.c).Close()
 	logger.LogDebug(fmt.Sprintln("[Conn Closing]"))
 	return