handle negative values, fix 1

deployment/config.json

@@ -16,6 +16,26 @@
           "label": "load1",
           "diff": "false"
         },
+        {
+          "oid": ".1.3.6.1.4.1.9676.123.1.4",
+          "label": "stratum",
+          "diff": "false"
+        },
+        {
+          "oid": ".1.3.6.1.4.1.9676.123.1.7",
+          "label": "rootdisp",
+          "diff": "false"
+        },
+        {
+          "oid": ".1.3.6.1.4.1.9676.123.2.3",
+          "label": "ss-reset",
+          "diff": "false"
+        },
+        {
+          "oid": ".1.3.6.1.4.1.9676.123.2.10",
+          "label": "processed-pkts",
+          "diff": "true"
+        },
         {
           "oid": ".1.3.6.1.2.1.31.1.1.1.6.2",
           "label": "lan-in",
@@ -35,11 +55,6 @@
           "oid": ".1.3.6.1.2.1.31.1.1.1.11.2",
           "label": "lan-out-pkts",
           "diff": "true"
-        },
-        {
-          "oid": ".1.3.6.1.4.1.9676.1",
-          "label": "time-req-pkts",
-          "diff": "true"
         }
       ]
     },

src/smq/snmp/snmp.go

@@ -56,6 +56,9 @@ func calculateDifference(key string, newValue string) (string, error) {
       Timestamp: currentTime,
       Value: newValue,
     }
+    if diffValuePerSecond < 0 {
+      return "", fmt.Errorf("negative difference value: %d", diffValuePerSecond)
+    }
     return strconv.Itoa(diffValuePerSecond), nil
   } else {
     log.Printf("create lvv for %s", key)