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-rw-r--r--src/org/traccar/helper/Checksum.java8
1 files changed, 8 insertions, 0 deletions
diff --git a/src/org/traccar/helper/Checksum.java b/src/org/traccar/helper/Checksum.java
index 5aed84bf8..adfa697c5 100644
--- a/src/org/traccar/helper/Checksum.java
+++ b/src/org/traccar/helper/Checksum.java
@@ -160,6 +160,14 @@ public final class Checksum {
return String.format("*%02x", checksum).toUpperCase();
}
+ public static int sum(ByteBuffer buf) {
+ byte checksum = 0;
+ while (buf.hasRemaining()) {
+ checksum += buf.get();
+ }
+ return checksum;
+ }
+
public static String sum(String msg) {
byte checksum = 0;
for (byte b : msg.getBytes(StandardCharsets.US_ASCII)) {