--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rvinterf/old/before-rvinterf/packettx.c	Sat Jun 11 00:13:35 2016 +0000
@@ -0,0 +1,32 @@
+/*
+ * This module handles the lowest level of serial packet Tx
+ */
+
+#include <sys/types.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include "pktmux.h"
+#include "txpkt.h"
+
+extern int target_fd;
+
+send_pkt_to_target(pkt, pktlen)
+	u_char *pkt;
+{
+	u_char buf[MAX_PKT_TO_TARGET*2+2];
+	u_char *cp, *dp, *endp;
+	int c;
+
+	endp = pkt + pktlen;
+	dp = buf;
+	*dp++ = STX;
+	for (cp = pkt; cp < endp; cp++) {
+		c = *cp;
+		if (c == STX || c == DLE)
+			*dp++ = DLE;
+		*dp++ = c;
+	}
+	*dp++ = STX;
+	write(target_fd, buf, dp - buf);
+}