diff --git a/pkg/rings/decode.go b/pkg/rings/decode.go index 45c17cb..a725531 100644 --- a/pkg/rings/decode.go +++ b/pkg/rings/decode.go @@ -72,3 +72,51 @@ func unsafeDecodeAddress[T ~uint | NodeID](a, b, c, d byte) (RingID, RegionID, Z return k, r, 0, n } } + +// DecodeRingZeroAddress attempts to extract region, zone and node identifiers +// from a given ring 0 address. +// +// revive:disable:function-result-limit +func DecodeRingZeroAddress(addr netip.Addr) (RegionID, ZoneID, NodeID, bool) { + // revive:enable:function-result-limit + k, r, z, n := DecodeAddress[NodeID](addr) + if k == RingZeroID { + return r, z, n, true + } + + return 0, 0, 0, false +} + +// DecodeRingOneAddress attempts to extract region, zone and node identifiers +// from a given ring 1 address. +// +// revive:disable:function-result-limit +func DecodeRingOneAddress(addr netip.Addr) (RegionID, ZoneID, NodeID, bool) { + // revive:enable:function-result-limit + k, r, z, n := DecodeAddress[NodeID](addr) + if k == RingOneID { + return r, z, n, true + } + + return 0, 0, 0, false +} + +// DecodeRingTwoAddress attempts to extract region and unique identifier for +// a kubernetes service from a given ring 2 address. +func DecodeRingTwoAddress(addr netip.Addr) (RegionID, uint, bool) { + k, r, _, n := DecodeAddress[uint](addr) + if k == RingTwoID { + return r, n, true + } + return 0, 0, false +} + +// DecodeRingThreeAddress attempts to extract region and unique identifier for +// a kubernetes pod from a given ring 3 address. +func DecodeRingThreeAddress(addr netip.Addr) (RegionID, uint, bool) { + k, r, _, n := DecodeAddress[uint](addr) + if k == RingThreeID { + return r, n, true + } + return 0, 0, false +} diff --git a/pkg/rings/decode_test.go b/pkg/rings/decode_test.go new file mode 100644 index 0000000..2dff604 --- /dev/null +++ b/pkg/rings/decode_test.go @@ -0,0 +1,53 @@ +package rings + +import ( + "fmt" + "net/netip" + "testing" +) + +func TestDecodeRingZeroAddress(t *testing.T) { + RZNDecodeTest(t, "DecodeRingZeroAddress", DecodeRingZeroAddress, []RZNDecodeTestCase{ + {1, 1, 50, MustParseAddr("10.0.17.50"), true}, + {1, 2, 50, MustParseAddr("10.0.18.50"), true}, + {2, 3, 1, MustParseAddr("10.0.35.1"), true}, + }) +} + +func TesDecodetRingOneAddress(t *testing.T) { + RZNDecodeTest(t, "DecodeRingOneAddress", DecodeRingOneAddress, []RZNDecodeTestCase{ + {1, 1, 50, MustParseAddr("10.1.16.50"), true}, + {1, 2, 50, MustParseAddr("10.1.32.50"), true}, + {2, 3, 300, MustParseAddr("10.2.49.44"), true}, + }) +} + +type RZNDecodeTestCase struct { + region RegionID + zone ZoneID + node NodeID + addr netip.Addr + ok bool +} + +func RZNDecodeTest(t *testing.T, + fnName string, fn func(netip.Addr) (RegionID, ZoneID, NodeID, bool), + cases []RZNDecodeTestCase) { + // + for i, tc := range cases { + s := fmt.Sprintf("%s(%q)", fnName, tc.addr) + + r, z, n, ok := fn(tc.addr) + + switch { + case ok != tc.ok, r != tc.region, z != tc.zone, n != tc.node: + t.Errorf("ERROR: [%v/%v]: %s → %v %v %v %v (expected %v %v %v %v)", + i, len(cases), s, + r, z, n, ok, + tc.region, tc.zone, tc.node, tc.ok) + default: + t.Logf("[%v/%v]: %s → %v %v %v %v", i, len(cases), s, + r, z, n, ok) + } + } +}