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Fuzz RTCM3 frame validation #580

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Fuzz RTCM3 frame validation #580

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22 changes: 22 additions & 0 deletions rtcm/rtcm_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -225,3 +225,25 @@ func TestParseFrameExtraTrailingData(t *testing.T) {
// Raw should be only the frame, not the trailing bytes.
require.Len(t, frame.Raw, HeaderSize+20+CRCSize)
}

// FuzzParseFrame fuzzes RTCM3 frame validation. ParseFrame sits on the hot path
// for every GNSS correction stream the daemon ingests (see cmd/ntripper), and
// the input is untrusted network data, so no input may panic or hang it.
func FuzzParseFrame(f *testing.F) {
for _, seed := range [][]byte{
{},
{0},
{9},
buildFrame(buildPayloadWithType(TypeStationARP, 20)),
buildFrame(buildPayloadWithType(TypeGPSMSM7, 100)),
buildFrame(buildPayloadWithType(TypeGLONASSBiases, 10)),
buildFrame(make([]byte, MaxPayloadLen)),
buildFrame(nil),
{0xD3, 0x00, 0x00, 0x00, 0x00, 0x00},
} {
f.Add(seed)
}
f.Fuzz(func(t *testing.T, b []byte) {
_, _ = ParseFrame(b)
})
}