Deal correctly with short strings am: 1921acbf2c am: 49fefde164 am: 444e06c469 am: 0f37e416a4 am: 04fdb2ce41 am: 05e029710c am: 8e0899faab am: 15a72380b1

am: a9c9a971cf

Change-Id: Ibe80f3d455c6f7ccdf61a03ce6da5b9f01e7a171

1 files changed, 13 insertions, 5 deletions

diff --git a/service/jni/com_android_server_wifi_WifiNative.cpp b/service/jni/com_android_server_wifi_WifiNative.cpp
index 765fd9552..49c9b78d2 100644
--- a/service/jni/com_android_server_wifi_WifiNative.cpp
+++ b/service/jni/com_android_server_wifi_WifiNative.cpp
@@ -658,15 +658,23 @@ static byte parseHexChar(char ch) {
 }
 
 static byte parseHexByte(const char * &str) {
+    if (str[0] == '\0') {
+        ALOGE("Passed an empty string");
+        return 0;
+    }
     byte b = parseHexChar(str[0]);
-    if (str[1] == ':' || str[1] == '\0') {
-        str += 2;
-        return b;
+    if (str[1] == '\0' || str[1] == ':') {
+        str ++;
     } else {
         b = b << 4 | parseHexChar(str[1]);
-        str += 3;
-        return b;
+        str += 2;
+    }
+
+    // Skip trailing delimiter if not at the end of the string.
+    if (str[0] != '\0') {
+        str++;
     }
+    return b;
 }
 
 static void parseMacAddress(const char *str, mac_addr addr) {