From 0cc27dd91d014b44f56dba570656ec4c68d1aafe Mon Sep 17 00:00:00 2001
From: Harry Morris <h.morris@cascoda.com>
Date: Wed, 15 Feb 2017 17:12:43 +0000
Subject: [PATCH] Gracefully handle invalid linkquality command (#1261)

linkquality cli command always expects at least a extended address
specifying the link. If no argument is provided then throw an error
and exit.
---
 src/cli/cli.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/cli/cli.cpp b/src/cli/cli.cpp
index 712c82716..84fa9ef06 100644
--- a/src/cli/cli.cpp
+++ b/src/cli/cli.cpp
@@ -1007,6 +1007,7 @@ void Interpreter::ProcessLinkQuality(int argc, char *argv[])
     uint8_t linkQuality;
     long value;
 
+    VerifyOrExit(argc > 0, error = kThreadError_InvalidArgs);
     VerifyOrExit(Hex2Bin(argv[0], extAddress, OT_EXT_ADDRESS_SIZE) >= 0, error = kThreadError_Parse);
 
     if (argc == 1)