--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rvinterf/asyncshell/at.c	Sat Jun 11 00:13:35 2016 +0000
@@ -0,0 +1,45 @@
+/*
+ * Functions for the AT-over-RVTMUX interface
+ */
+
+#include <sys/types.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <string.h>
+#include <strings.h>
+#include <stdlib.h>
+#include "pktmux.h"
+#include "limits.h"
+
+send_string_to_ati(str)
+	char *str;
+{
+	unsigned len;
+	u_char sendpkt[MAX_PKT_TO_TARGET+1];
+
+	len = strlen(str);
+	if (len + 1 > MAX_PKT_TO_TARGET) {
+		printf("error: max pkt to target limit exceeded\n");
+		return(1);
+	}
+	/* fill out the packet */
+	sendpkt[0] = RVT_AT_HEADER;
+	strcpy(sendpkt + 1, str);
+	/* send it! */
+	send_pkt_to_target(sendpkt, len + 1);
+	return(0);
+}
+
+void
+cmd_sendat(arg)
+	char *arg;
+{
+	while (isspace(*arg))
+		arg++;
+	if (!*arg) {
+		printf("error: missing string argument\n");
+		return;
+	}
+	ati_rx_control(1);
+	send_string_to_ati(arg);
+}