--- a/rvinterf/asyncshell/Makefile	Sat May 30 06:45:21 2015 +0000
+++ b/rvinterf/asyncshell/Makefile	Sat May 30 07:20:50 2015 +0000
@@ -1,7 +1,7 @@
 CC=	gcc
 CFLAGS=	-O2 -I../include
 PROG=	fc-shell
-OBJS=	init.o main.o pktsort.o usercmd.o
+OBJS=	init.o main.o pktsort.o rxctl.o usercmd.o
 LIBS=	../libasync/libasync.a ../libg23/libg23.a
 INSTBIN=/usr/local/bin
 

--- a/rvinterf/asyncshell/init.c	Sat May 30 06:45:21 2015 +0000
+++ b/rvinterf/asyncshell/init.c	Sat May 30 07:20:50 2015 +0000
@@ -10,8 +10,6 @@
 #include "pktmux.h"
 #include "localsock.h"
 
-extern int sock;
-
 init()
 {
 	static u_char want_rvt_lost[9] = {CLI2RVI_WANT_RVTRACE,

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rvinterf/asyncshell/rxctl.c	Sat May 30 07:20:50 2015 +0000
@@ -0,0 +1,89 @@
+/*
+ * This module contains the code for enabling and disabling the receiving
+ * of various packet types via rvinterf.
+ */
+
+#include <sys/types.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <string.h>
+#include <strings.h>
+#include <stdlib.h>
+#include "pktmux.h"
+#include "localsock.h"
+
+void
+send_rxctl_cmd(channel, enable)
+{
+	u_char cmdbuf[2];
+
+	cmdbuf[0] = enable ? CLI2RVI_WANT_MUXPROTO : CLI2RVI_DROP_MUXPROTO;
+	cmdbuf[1] = channel;
+	send_init_command(cmdbuf, 2);
+}
+
+void
+ati_rx_control(newstate)
+{
+	static int state = 0;
+
+	if (state == newstate)
+		return;
+	send_rxctl_cmd(RVT_AT_HEADER, newstate);
+	state = newstate;
+}
+
+void
+gpf_rx_control(newstate)
+{
+	static int state = 0;
+
+	if (state == newstate)
+		return;
+	send_rxctl_cmd(RVT_L23_HEADER, newstate);
+	state = newstate;
+}
+
+void
+rxctl_user_cmd(args, enable)
+	char *args;
+{
+	char *cp, *np;
+	int gotsome = 0;
+
+	for (cp = args; ; ) {
+		while (isspace(*cp))
+			cp++;
+		if (!*cp) {
+			if (!gotsome)
+				printf("error: argument required\n");
+			return;
+		}
+		for (np = cp; *cp && !isspace(*cp); cp++)
+			;
+		if (*cp)
+			*cp++ = '\0';
+		if (!strcmp(np, "ati"))
+			ati_rx_control(enable);
+		else if (!strcmp(np, "gpf"))
+			gpf_rx_control(enable);
+		else {
+			printf("error: unknown channel \"%s\"\n", np);
+			return;
+		}
+	}
+}
+
+void
+cmd_enable(args)
+	char *args;
+{
+	rxctl_user_cmd(args, 1);
+}
+
+void
+cmd_disable(args)
+	char *args;
+{
+	rxctl_user_cmd(args, 0);
+}

--- a/rvinterf/asyncshell/usercmd.c	Sat May 30 06:45:21 2015 +0000
+++ b/rvinterf/asyncshell/usercmd.c	Sat May 30 07:20:50 2015 +0000
@@ -11,6 +11,9 @@
 
 extern char usercmd[];
 
+extern void cmd_disable();
+extern void cmd_enable();
+
 void
 cmd_exit()
 {
@@ -22,6 +25,8 @@
 	char *cmd;
 	void (*func)();
 } cmdtab[] = {
+	{"disable", cmd_disable},
+	{"enable", cmd_enable},
 	{"exit", cmd_exit},
 	{"quit", cmd_exit},
 	{0, 0}