Return detailed errors when iterating NDP options

Test: header_test.TestNDPOptionsIterCheck
PiperOrigin-RevId: 306953867

1 files changed, 50 insertions, 0 deletions

diff --git a/pkg/tcpip/header/ndpoptionidentifier_string.go b/pkg/tcpip/header/ndpoptionidentifier_string.go
new file mode 100644
index 000000000..6fe9a336b
--- /dev/null
+++ b/pkg/tcpip/header/ndpoptionidentifier_string.go
@@ -0,0 +1,50 @@
+// Copyright 2020 The gVisor Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Code generated by "stringer -type NDPOptionIdentifier ."; DO NOT EDIT.
+
+package header
+
+import "strconv"
+
+func _() {
+	// An "invalid array index" compiler error signifies that the constant values have changed.
+	// Re-run the stringer command to generate them again.
+	var x [1]struct{}
+	_ = x[NDPSourceLinkLayerAddressOptionType-1]
+	_ = x[NDPTargetLinkLayerAddressOptionType-2]
+	_ = x[NDPPrefixInformationType-3]
+	_ = x[NDPRecursiveDNSServerOptionType-25]
+}
+
+const (
+	_NDPOptionIdentifier_name_0 = "NDPSourceLinkLayerAddressOptionTypeNDPTargetLinkLayerAddressOptionTypeNDPPrefixInformationType"
+	_NDPOptionIdentifier_name_1 = "NDPRecursiveDNSServerOptionType"
+)
+
+var (
+	_NDPOptionIdentifier_index_0 = [...]uint8{0, 35, 70, 94}
+)
+
+func (i NDPOptionIdentifier) String() string {
+	switch {
+	case 1 <= i && i <= 3:
+		i -= 1
+		return _NDPOptionIdentifier_name_0[_NDPOptionIdentifier_index_0[i]:_NDPOptionIdentifier_index_0[i+1]]
+	case i == 25:
+		return _NDPOptionIdentifier_name_1
+	default:
+		return "NDPOptionIdentifier(" + strconv.FormatInt(int64(i), 10) + ")"
+	}
+}