82 lines
1.9 KiB
Go
82 lines
1.9 KiB
Go
//go:build gofuzz
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// +build gofuzz
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package netlink
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import "github.com/google/go-cmp/cmp"
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func fuzz(b1 []byte) int {
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// 1. unmarshal, marshal, unmarshal again to check m1 and m2 for equality
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// after a round trip. checkMessage is also used because there is a fair
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// amount of tricky logic around testing for presence of error headers and
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// extended acknowledgement attributes.
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var m1 Message
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if err := m1.UnmarshalBinary(b1); err != nil {
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return 0
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}
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if err := checkMessage(m1); err != nil {
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return 0
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}
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b2, err := m1.MarshalBinary()
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if err != nil {
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panicf("failed to marshal m1: %v", err)
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}
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var m2 Message
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if err := m2.UnmarshalBinary(b2); err != nil {
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panicf("failed to unmarshal m2: %v", err)
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}
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if err := checkMessage(m2); err != nil {
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panicf("failed to check m2: %v", err)
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}
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if diff := cmp.Diff(m1, m2); diff != "" {
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panicf("unexpected Message (-want +got):\n%s", diff)
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}
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// 2. marshal again and compare b2 and b3 (b1 may have reserved bytes set
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// which we ignore and fill with zeros when marshaling) for equality.
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b3, err := m2.MarshalBinary()
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if err != nil {
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panicf("failed to marshal m2: %v", err)
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}
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if diff := cmp.Diff(b2, b3); diff != "" {
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panicf("unexpected message bytes (-want +got):\n%s", diff)
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}
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// 3. unmarshal any possible attributes from m1's data and marshal them
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// again for comparison.
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a1, err := UnmarshalAttributes(m1.Data)
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if err != nil {
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return 0
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}
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ab1, err := MarshalAttributes(a1)
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if err != nil {
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panicf("failed to marshal a1: %v", err)
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}
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a2, err := UnmarshalAttributes(ab1)
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if err != nil {
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panicf("failed to unmarshal a2: %v", err)
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}
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if diff := cmp.Diff(a1, a2); diff != "" {
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panicf("unexpected Attributes (-want +got):\n%s", diff)
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}
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ab2, err := MarshalAttributes(a2)
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if err != nil {
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panicf("failed to marshal a2: %v", err)
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}
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if diff := cmp.Diff(ab1, ab2); diff != "" {
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panicf("unexpected attribute bytes (-want +got):\n%s", diff)
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}
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return 1
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}
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