1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
|
// Copyright 2019 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 header provides the implementation of the encoding and decoding of
// network protocol headers.
package header_test
import (
"testing"
"gvisor.dev/gvisor/pkg/tcpip/buffer"
"gvisor.dev/gvisor/pkg/tcpip/header"
)
func TestChecksumVVWithOffset(t *testing.T) {
testCases := []struct {
name string
vv buffer.VectorisedView
off, size int
initial uint16
want uint16
}{
{
name: "empty",
vv: buffer.NewVectorisedView(0, []buffer.View{
buffer.NewViewFromBytes([]byte{1, 9, 0, 5, 4}),
}),
off: 0,
size: 0,
want: 0,
},
{
name: "OneView",
vv: buffer.NewVectorisedView(0, []buffer.View{
buffer.NewViewFromBytes([]byte{1, 9, 0, 5, 4}),
}),
off: 0,
size: 5,
want: 1294,
},
{
name: "TwoViews",
vv: buffer.NewVectorisedView(0, []buffer.View{
buffer.NewViewFromBytes([]byte{1, 9, 0, 5, 4}),
buffer.NewViewFromBytes([]byte{4, 3, 7, 1, 2, 123}),
}),
off: 0,
size: 11,
want: 33819,
},
{
name: "TwoViewsWithOffset",
vv: buffer.NewVectorisedView(0, []buffer.View{
buffer.NewViewFromBytes([]byte{98, 1, 9, 0, 5, 4}),
buffer.NewViewFromBytes([]byte{4, 3, 7, 1, 2, 123}),
}),
off: 1,
size: 11,
want: 33819,
},
{
name: "ThreeViewsWithOffset",
vv: buffer.NewVectorisedView(0, []buffer.View{
buffer.NewViewFromBytes([]byte{98, 1, 9, 0, 5, 4}),
buffer.NewViewFromBytes([]byte{98, 1, 9, 0, 5, 4}),
buffer.NewViewFromBytes([]byte{4, 3, 7, 1, 2, 123}),
}),
off: 7,
size: 11,
want: 33819,
},
{
name: "ThreeViewsWithInitial",
vv: buffer.NewVectorisedView(0, []buffer.View{
buffer.NewViewFromBytes([]byte{77, 11, 33, 0, 55, 44}),
buffer.NewViewFromBytes([]byte{98, 1, 9, 0, 5, 4}),
buffer.NewViewFromBytes([]byte{4, 3, 7, 1, 2, 123, 99}),
}),
initial: 77,
off: 7,
size: 11,
want: 33896,
},
}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
if got, want := header.ChecksumVVWithOffset(tc.vv, tc.initial, tc.off, tc.size), tc.want; got != want {
t.Errorf("header.ChecksumVVWithOffset(%v) = %v, want: %v", tc, got, tc.want)
}
v := tc.vv.ToView()
v.TrimFront(tc.off)
v.CapLength(tc.size)
if got, want := header.Checksum(v, tc.initial), tc.want; got != want {
t.Errorf("header.Checksum(%v) = %v, want: %v", tc, got, tc.want)
}
})
}
}
|
