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path: root/pkg/sentry/socket/netlink/message_test.go
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Diffstat (limited to 'pkg/sentry/socket/netlink/message_test.go')
-rw-r--r--pkg/sentry/socket/netlink/message_test.go312
1 files changed, 312 insertions, 0 deletions
diff --git a/pkg/sentry/socket/netlink/message_test.go b/pkg/sentry/socket/netlink/message_test.go
new file mode 100644
index 000000000..ef13d9386
--- /dev/null
+++ b/pkg/sentry/socket/netlink/message_test.go
@@ -0,0 +1,312 @@
+// 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.
+
+package message_test
+
+import (
+ "bytes"
+ "reflect"
+ "testing"
+
+ "gvisor.dev/gvisor/pkg/abi/linux"
+ "gvisor.dev/gvisor/pkg/sentry/socket/netlink"
+)
+
+type dummyNetlinkMsg struct {
+ Foo uint16
+}
+
+func TestParseMessage(t *testing.T) {
+ tests := []struct {
+ desc string
+ input []byte
+
+ header linux.NetlinkMessageHeader
+ dataMsg *dummyNetlinkMsg
+ restLen int
+ ok bool
+ }{
+ {
+ desc: "valid",
+ input: []byte{
+ 0x14, 0x00, 0x00, 0x00, // Length
+ 0x01, 0x00, // Type
+ 0x02, 0x00, // Flags
+ 0x03, 0x00, 0x00, 0x00, // Seq
+ 0x04, 0x00, 0x00, 0x00, // PortID
+ 0x30, 0x31, 0x00, 0x00, // Data message with 2 bytes padding
+ },
+ header: linux.NetlinkMessageHeader{
+ Length: 20,
+ Type: 1,
+ Flags: 2,
+ Seq: 3,
+ PortID: 4,
+ },
+ dataMsg: &dummyNetlinkMsg{
+ Foo: 0x3130,
+ },
+ restLen: 0,
+ ok: true,
+ },
+ {
+ desc: "valid with next message",
+ input: []byte{
+ 0x14, 0x00, 0x00, 0x00, // Length
+ 0x01, 0x00, // Type
+ 0x02, 0x00, // Flags
+ 0x03, 0x00, 0x00, 0x00, // Seq
+ 0x04, 0x00, 0x00, 0x00, // PortID
+ 0x30, 0x31, 0x00, 0x00, // Data message with 2 bytes padding
+ 0xFF, // Next message (rest)
+ },
+ header: linux.NetlinkMessageHeader{
+ Length: 20,
+ Type: 1,
+ Flags: 2,
+ Seq: 3,
+ PortID: 4,
+ },
+ dataMsg: &dummyNetlinkMsg{
+ Foo: 0x3130,
+ },
+ restLen: 1,
+ ok: true,
+ },
+ {
+ desc: "valid for last message without padding",
+ input: []byte{
+ 0x12, 0x00, 0x00, 0x00, // Length
+ 0x01, 0x00, // Type
+ 0x02, 0x00, // Flags
+ 0x03, 0x00, 0x00, 0x00, // Seq
+ 0x04, 0x00, 0x00, 0x00, // PortID
+ 0x30, 0x31, // Data message
+ },
+ header: linux.NetlinkMessageHeader{
+ Length: 18,
+ Type: 1,
+ Flags: 2,
+ Seq: 3,
+ PortID: 4,
+ },
+ dataMsg: &dummyNetlinkMsg{
+ Foo: 0x3130,
+ },
+ restLen: 0,
+ ok: true,
+ },
+ {
+ desc: "valid for last message not to be aligned",
+ input: []byte{
+ 0x13, 0x00, 0x00, 0x00, // Length
+ 0x01, 0x00, // Type
+ 0x02, 0x00, // Flags
+ 0x03, 0x00, 0x00, 0x00, // Seq
+ 0x04, 0x00, 0x00, 0x00, // PortID
+ 0x30, 0x31, // Data message
+ 0x00, // Excessive 1 byte permitted at end
+ },
+ header: linux.NetlinkMessageHeader{
+ Length: 19,
+ Type: 1,
+ Flags: 2,
+ Seq: 3,
+ PortID: 4,
+ },
+ dataMsg: &dummyNetlinkMsg{
+ Foo: 0x3130,
+ },
+ restLen: 0,
+ ok: true,
+ },
+ {
+ desc: "header.Length too short",
+ input: []byte{
+ 0x04, 0x00, 0x00, 0x00, // Length
+ 0x01, 0x00, // Type
+ 0x02, 0x00, // Flags
+ 0x03, 0x00, 0x00, 0x00, // Seq
+ 0x04, 0x00, 0x00, 0x00, // PortID
+ 0x30, 0x31, 0x00, 0x00, // Data message with 2 bytes padding
+ },
+ ok: false,
+ },
+ {
+ desc: "header.Length too long",
+ input: []byte{
+ 0xFF, 0xFF, 0x00, 0x00, // Length
+ 0x01, 0x00, // Type
+ 0x02, 0x00, // Flags
+ 0x03, 0x00, 0x00, 0x00, // Seq
+ 0x04, 0x00, 0x00, 0x00, // PortID
+ 0x30, 0x31, 0x00, 0x00, // Data message with 2 bytes padding
+ },
+ ok: false,
+ },
+ {
+ desc: "header incomplete",
+ input: []byte{
+ 0x04, 0x00, 0x00, 0x00, // Length
+ },
+ ok: false,
+ },
+ {
+ desc: "empty message",
+ input: []byte{},
+ ok: false,
+ },
+ }
+ for _, test := range tests {
+ msg, rest, ok := netlink.ParseMessage(test.input)
+ if ok != test.ok {
+ t.Errorf("%v: got ok = %v, want = %v", test.desc, ok, test.ok)
+ continue
+ }
+ if !test.ok {
+ continue
+ }
+ if !reflect.DeepEqual(msg.Header(), test.header) {
+ t.Errorf("%v: got hdr = %+v, want = %+v", test.desc, msg.Header(), test.header)
+ }
+
+ dataMsg := &dummyNetlinkMsg{}
+ _, dataOk := msg.GetData(dataMsg)
+ if !dataOk {
+ t.Errorf("%v: GetData.ok = %v, want = true", test.desc, dataOk)
+ } else if !reflect.DeepEqual(dataMsg, test.dataMsg) {
+ t.Errorf("%v: GetData.msg = %+v, want = %+v", test.desc, dataMsg, test.dataMsg)
+ }
+
+ if got, want := rest, test.input[len(test.input)-test.restLen:]; !bytes.Equal(got, want) {
+ t.Errorf("%v: got rest = %v, want = %v", test.desc, got, want)
+ }
+ }
+}
+
+func TestAttrView(t *testing.T) {
+ tests := []struct {
+ desc string
+ input []byte
+
+ // Outputs for ParseFirst.
+ hdr linux.NetlinkAttrHeader
+ value []byte
+ restLen int
+ ok bool
+
+ // Outputs for Empty.
+ isEmpty bool
+ }{
+ {
+ desc: "valid",
+ input: []byte{
+ 0x06, 0x00, // Length
+ 0x01, 0x00, // Type
+ 0x30, 0x31, 0x00, 0x00, // Data with 2 bytes padding
+ },
+ hdr: linux.NetlinkAttrHeader{
+ Length: 6,
+ Type: 1,
+ },
+ value: []byte{0x30, 0x31},
+ restLen: 0,
+ ok: true,
+ isEmpty: false,
+ },
+ {
+ desc: "at alignment",
+ input: []byte{
+ 0x08, 0x00, // Length
+ 0x01, 0x00, // Type
+ 0x30, 0x31, 0x32, 0x33, // Data
+ },
+ hdr: linux.NetlinkAttrHeader{
+ Length: 8,
+ Type: 1,
+ },
+ value: []byte{0x30, 0x31, 0x32, 0x33},
+ restLen: 0,
+ ok: true,
+ isEmpty: false,
+ },
+ {
+ desc: "at alignment with rest data",
+ input: []byte{
+ 0x08, 0x00, // Length
+ 0x01, 0x00, // Type
+ 0x30, 0x31, 0x32, 0x33, // Data
+ 0xFF, 0xFE, // Rest data
+ },
+ hdr: linux.NetlinkAttrHeader{
+ Length: 8,
+ Type: 1,
+ },
+ value: []byte{0x30, 0x31, 0x32, 0x33},
+ restLen: 2,
+ ok: true,
+ isEmpty: false,
+ },
+ {
+ desc: "hdr.Length too long",
+ input: []byte{
+ 0xFF, 0x00, // Length
+ 0x01, 0x00, // Type
+ 0x30, 0x31, 0x32, 0x33, // Data
+ },
+ ok: false,
+ isEmpty: false,
+ },
+ {
+ desc: "hdr.Length too short",
+ input: []byte{
+ 0x01, 0x00, // Length
+ 0x01, 0x00, // Type
+ 0x30, 0x31, 0x32, 0x33, // Data
+ },
+ ok: false,
+ isEmpty: false,
+ },
+ {
+ desc: "empty",
+ input: []byte{},
+ ok: false,
+ isEmpty: true,
+ },
+ }
+ for _, test := range tests {
+ attrs := netlink.AttrsView(test.input)
+
+ // Test ParseFirst().
+ hdr, value, rest, ok := attrs.ParseFirst()
+ if ok != test.ok {
+ t.Errorf("%v: got ok = %v, want = %v", test.desc, ok, test.ok)
+ } else if test.ok {
+ if !reflect.DeepEqual(hdr, test.hdr) {
+ t.Errorf("%v: got hdr = %+v, want = %+v", test.desc, hdr, test.hdr)
+ }
+ if !bytes.Equal(value, test.value) {
+ t.Errorf("%v: got value = %v, want = %v", test.desc, value, test.value)
+ }
+ if wantRest := test.input[len(test.input)-test.restLen:]; !bytes.Equal(rest, wantRest) {
+ t.Errorf("%v: got rest = %v, want = %v", test.desc, rest, wantRest)
+ }
+ }
+
+ // Test Empty().
+ if got, want := attrs.Empty(), test.isEmpty; got != want {
+ t.Errorf("%v: got empty = %v, want = %v", test.desc, got, want)
+ }
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 16:19:37 +0000