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test(bpf): finish table-driving decode_test.go (#139) #214

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test(bpf): finish table-driving decode_test.go (#139) #214

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20 changes: 3 additions & 17 deletions internal/bpf/decode_test.go
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Original file line number Diff line number Diff line change
@@ -1,3 +1,5 @@
//go:build linux

// Copyright 2026 Optiqor contributors
// SPDX-License-Identifier: Apache-2.0

Expand Down Expand Up @@ -94,7 +96,7 @@ func TestDecodeTCPEvent(t *testing.T) {
SAddr: binary.BigEndian.Uint32([]byte{10, 0, 0, 1}),
DAddr: binary.BigEndian.Uint32([]byte{8, 8, 8, 8}),
SPort: 54321,
DPort: 443, // already in host byte order (BPF normalizes before writing)
DPort: 443,
EventType: TCPEventRTT,
RTTUs: 250,
}
Expand Down Expand Up @@ -489,20 +491,4 @@ func TestIsSyscallError(t *testing.T) {
}
}

func TestTCPEventPortByteOrder(t *testing.T) {
// Verify that ports in TCPEvent are host byte order.
// The BPF program applies bpf_ntohs() to dport before writing,
// so both fields should be readable directly without swapping.
e := TCPEvent{
SPort: 54321, // ephemeral source port, host order
DPort: 443, // HTTPS destination port, host order (not 47873)
}
if e.DPort == 0xBB01 { // 47873 = 443 byte-swapped
t.Error("DPort is in network byte order; expected host byte order after BPF normalization")
}
if e.DPort != 443 {
t.Errorf("DPort = %d, want 443", e.DPort)
}
}

var _ = net.IPv4(0, 0, 0, 0)
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