Pierre-Olivier Mercier
70140bc289
Embed the IEEE OUI registry (~1MB pre-processed text file) and resolve the vendor for every station MAC. Locally administered MACs (U/L bit set, used by iOS/Android private addresses and virtual interfaces) are skipped so we don't return spurious matches against randomized prefixes. The vendor name shows up in the device card as a secondary line, and falls back to the title position when no DHCP hostname is available — "Apple" with the IP and MAC is far more useful than "Sans nom". The lookup table loads lazily (sync.Once) on the first call so the ~40k-entry parse only runs when the station discovery code is exercised.
57 lines
1.6 KiB
Go
57 lines
1.6 KiB
Go
package backend
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import "testing"
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func TestLookupVendor(t *testing.T) {
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cases := []struct {
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mac string
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want string
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exact bool // when true, want must match exactly; otherwise non-empty is enough
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comment string
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}{
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{"00:1c:b3:11:22:33", "Apple", true, "Apple OUI"},
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{"f4:0f:24:11:22:33", "Apple", true, "Apple OUI uppercase"},
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{"B8:27:EB:AA:BB:CC", "", false, "Raspberry Pi Foundation"},
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{"dc:a6:32:11:22:33", "", false, "Raspberry Pi Trading"},
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{"02:11:22:33:44:55", "", true, "locally administered (U/L bit set)"},
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{"aa:bb:cc:dd:ee:ff", "", true, "locally administered randomized"},
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{"", "", true, "empty mac"},
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{"not a mac", "", true, "garbage"},
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}
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for _, tc := range cases {
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got := LookupVendor(tc.mac)
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if tc.exact {
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if got != tc.want {
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t.Errorf("%s: LookupVendor(%q) = %q, want %q", tc.comment, tc.mac, got, tc.want)
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}
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continue
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}
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if got == "" {
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t.Errorf("%s: LookupVendor(%q) returned empty, expected non-empty", tc.comment, tc.mac)
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}
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}
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}
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func TestNormalizeOUI(t *testing.T) {
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cases := []struct {
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in string
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want string
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}{
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{"00:1c:b3:11:22:33", "001CB3"},
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{"00-1c-b3-11-22-33", "001CB3"},
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{"001c.b311.2233", "001CB3"},
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{"001cb3112233", "001CB3"},
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{"02:11:22:33:44:55", ""}, // U/L bit set
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{"03:11:22:33:44:55", ""}, // U/L bit set
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{"06:11:22:33:44:55", ""}, // U/L bit set
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{"01:00:5e:00:00:00", "01005E"}, // bit 0 (multicast) is fine, only bit 1 matters
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{"abcd", ""}, // too short
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}
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for _, tc := range cases {
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if got := normalizeOUI(tc.in); got != tc.want {
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t.Errorf("normalizeOUI(%q) = %q, want %q", tc.in, got, tc.want)
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}
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}
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}
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