--- a/rvinterf/asyncshell/pktsort.c	Tue May 03 23:46:54 2016 +0000
+++ b/rvinterf/asyncshell/pktsort.c	Mon May 30 22:45:48 2016 +0000
@@ -58,24 +58,6 @@
 	async_msg_output(buf);
 }
 
-static void
-dump_tch()
-{
-	char buf[MAX_PKT_FROM_TARGET*3+5], *dp;
-	u_char *cp, *endp;
-
-	cp = rvi_msg + 2;
-	endp = rvi_msg + rvi_msg_len;
-	strcpy(buf, "TCH:");
-	dp = buf + 4;
-	while (cp < endp) {
-		sprintf(dp, " %02X", *cp++);
-		dp += 3;
-	}
-	*dp = '\0';
-	async_msg_output(buf);
-}
-
 void
 process_pkt_from_target()
 {
@@ -90,7 +72,7 @@
 		response_from_ati();
 		return;
 	case RVT_TCH_HEADER:
-		dump_tch();
+		tch_packet_rx();
 		return;
 	default:
 		tty_cleanup();

--- a/rvinterf/asyncshell/tchcmd.c	Tue May 03 23:46:54 2016 +0000
+++ b/rvinterf/asyncshell/tchcmd.c	Mon May 30 22:45:48 2016 +0000
@@ -9,8 +9,14 @@
 #include <strings.h>
 #include <stdlib.h>
 #include "pktmux.h"
+#include "limits.h"
 #include "tch_feature.h"
 
+extern u_char rvi_msg[];
+extern int rvi_msg_len;
+
+static int tch_rawdump_mode;
+
 send_tch_config_req(config)
 {
 	u_char sendpkt[3];
@@ -60,3 +66,55 @@
 {
 	return cmd_tchdl_common(argc - 1, argv + 1);
 }
+
+static void
+tch_rawdump()
+{
+	char buf[MAX_PKT_FROM_TARGET*3+5], *dp;
+	u_char *cp, *endp;
+
+	cp = rvi_msg + 2;
+	endp = rvi_msg + rvi_msg_len;
+	strcpy(buf, "TCH:");
+	dp = buf + 4;
+	while (cp < endp) {
+		sprintf(dp, " %02X", *cp++);
+		dp += 3;
+	}
+	*dp = '\0';
+	async_msg_output(buf);
+}
+
+void
+tch_packet_rx()
+{
+	char buf[128];
+
+	if (tch_rawdump_mode) {
+		tch_rawdump();
+		return;
+	}
+	if (rvi_msg_len < 3) {
+inv:		async_msg_output("Error: invalid TCH packet received");
+		return;
+	}
+	switch (rvi_msg[2]) {
+	case TCH_CONFIG_CONF:
+		if (rvi_msg_len != 4)
+			goto inv;
+		if (rvi_msg[3] & 0xFE)
+			goto inv;
+		sprintf(buf, "TCH_CONFIG_CONF: DL forwarding is %s",
+			rvi_msg[3] ? "enabled" : "disabled");
+		async_msg_output(buf);
+		return;
+	case TCH_ULBITS_CONF:
+		/* TCH UL play code will hook in here */
+		return;
+	case TCH_DLBITS_IND:
+		/* TCH DL record code will hook in here */
+		return;
+	default:
+		goto inv;
+	}
+}