Snmpreceiver fix counter64 (#26368)

.chloggen/snmpreceiver-add-counter64.yaml

@@ -0,0 +1,27 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: bug_fix
+
+# The name of the component, or a single word describing the area of concern, (e.g. filelogreceiver)
+component: snmpreceiver
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: SNMP values of type Counter64 were seen as unsupported, because the returned data type unint64 was unhandeled.
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [23897,26119]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:
+
+# If your change doesn't affect end users or the exported elements of any package,
+# you should instead start your pull request title with [chore] or use the "Skip Changelog" label.
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: [user]

receiver/snmpreceiver/client.go

@@ -392,6 +392,8 @@ func (c snmpClient) toInt64(name string, value interface{}) (int64, error) {
 		return int64(value), nil
 	case uint32:
 		return int64(value), nil
+	case uint64:
+		return int64(value), nil
 	default:
 		return 0, fmt.Errorf("incompatible type while converting OID '%s' data to int64", name)
 	}

receiver/snmpreceiver/client_test.go

@@ -513,7 +513,7 @@ func TestGetScalarData(t *testing.T) {
 				expectedSNMPData := []SNMPData{}
 				mockGoSNMP := new(mocks.MockGoSNMPWrapper)
 				pdu1 := gosnmp.SnmpPDU{
-					Value: uint64(math.MaxUint64),
+					Value: float64(math.MaxFloat64),
 					Name:  "1",
 					Type:  gosnmp.Counter64,
 				}
@@ -883,7 +883,7 @@ func TestGetIndexedData(t *testing.T) {
 				mockGoSNMP := new(mocks.MockGoSNMPWrapper)
 				mockGoSNMP.On("GetVersion", mock.Anything).Return(gosnmp.Version2c)
 				pdu := gosnmp.SnmpPDU{
-					Value: uint64(math.MaxUint64),
+					Value: float64(math.MaxFloat64),
 					Name:  "1.1",
 					Type:  gosnmp.Counter64,
 				}