iana: add test for error codes and fix Code{RoleConflict,Unauthorized}

Author: ernado

api/except.txt

@@ -22,3 +22,4 @@ pkg github.com/gortc/stun, type ClientOptions struct, Connection Connection
 pkg github.com/gortc/stun, type ClientOptions struct, Handler Handler
 pkg github.com/gortc/stun, type ClientOptions struct, RTO time.Duration
 pkg github.com/gortc/stun, type ClientOptions struct, TimeoutRate time.Duration
+pkg github.com/gortc/stun, const CodeRoleConflict = 478

api/stun1.18.1.txt

@@ -0,0 +1,3 @@
+pkg github.com/gortc/stun, const CodeRoleConflict = 487
+pkg github.com/gortc/stun, const CodeUnauthorized = 401
+pkg github.com/gortc/stun, const CodeUnauthorized ErrorCode

e2e/main.go

@@ -52,7 +52,7 @@ func test(network string) {
 		if codeErr := errCode.GetFrom(response); codeErr != nil {
 			log.Fatalln("failed to get error code:", codeErr)
 		}
-		if errCode.Code != stun.CodeUnauthorised {
+		if errCode.Code != stun.CodeUnauthorized {
 			log.Fatalln("unexpected error code:", errCode)
 		}
 		if parseErr := response.Parse(&nonce, &realm); parseErr != nil {

errorcode.go

@@ -90,13 +90,19 @@ func (c ErrorCode) AddTo(m *Message) error {
 const (
 	CodeTryAlternate     ErrorCode = 300
 	CodeBadRequest       ErrorCode = 400
-	CodeUnauthorised     ErrorCode = 401
+	CodeUnauthorized     ErrorCode = 401
 	CodeUnknownAttribute ErrorCode = 420
 	CodeStaleNonce       ErrorCode = 438
-	CodeRoleConflict     ErrorCode = 478
+	CodeRoleConflict     ErrorCode = 487
 	CodeServerError      ErrorCode = 500
 )
 
+// DEPRECATED constants.
+const (
+	// DEPRECATED, use CodeUnauthorized.
+	CodeUnauthorised = CodeUnauthorized
+)
+
 // Error codes from RFC 5766.
 //
 // RFC 5766 Section 15
@@ -128,7 +134,7 @@ const (
 var errorReasons = map[ErrorCode][]byte{
 	CodeTryAlternate:     []byte("Try Alternate"),
 	CodeBadRequest:       []byte("Bad Request"),
-	CodeUnauthorised:     []byte("Unauthorised"),
+	CodeUnauthorized:     []byte("Unauthorized"),
 	CodeUnknownAttribute: []byte("Unknown Attribute"),
 	CodeStaleNonce:       []byte("Stale Nonce"),
 	CodeServerError:      []byte("Server Error"),

iana_test.go

@@ -75,7 +75,36 @@ func TestIANA(t *testing.T) {
 		for val, name := range attrNames {
 			mapped, ok := m[name]
 			if !ok {
-				t.Errorf("failed to find method %s in IANA", name)
+				t.Errorf("failed to find attribute %s in IANA", name)
+			}
+			if mapped != val {
+				t.Errorf("%s: IANA %d != actual %d", name, mapped, val)
+			}
+		}
+	})
+	t.Run("ErrorCodes", func(t *testing.T) {
+		records := loadCSV(t, "stun-parameters-6.csv")
+		m := map[string]ErrorCode{}
+		for _, r := range records[1:] {
+			var (
+				v    = r[0]
+				name = r[1]
+			)
+			if strings.Contains(v, "-") {
+				continue
+			}
+			val, parseErr := strconv.ParseInt(v, 10, 64)
+			if parseErr != nil {
+				t.Fatal(parseErr)
+			}
+			t.Logf("value: 0x%x, name: %s", val, name)
+			m[name] = ErrorCode(val)
+		}
+		for val, nameB := range errorReasons {
+			name := string(nameB)
+			mapped, ok := m[name]
+			if !ok {
+				t.Errorf("failed to find error code %s in IANA", name)
 			}
 			if mapped != val {
 				t.Errorf("%s: IANA %d != actual %d", name, mapped, val)