| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | package l2topology |
| 4 | |
| 5 | import ( |
| 6 | "sort" |
| 7 | "strings" |
| 8 | ) |
| 9 | |
| 10 | func buildFDBReporterAliases( |
| 11 | deviceByID map[string]Device, |
| 12 | ifaceByDeviceIndex map[string]Interface, |
| 13 | ) map[string][]string { |
| 14 | aliases := make(map[string]map[string]struct{}, len(deviceByID)) |
| 15 | |
| 16 | for _, device := range deviceByID { |
| 17 | deviceID := strings.TrimSpace(device.ID) |
| 18 | if deviceID == "" { |
| 19 | continue |
| 20 | } |
| 21 | chassisMAC := normalizeMAC(device.ChassisID) |
| 22 | if chassisMAC == "" { |
| 23 | continue |
| 24 | } |
| 25 | if aliases[deviceID] == nil { |
| 26 | aliases[deviceID] = make(map[string]struct{}) |
| 27 | } |
| 28 | aliases[deviceID]["mac:"+chassisMAC] = struct{}{} |
| 29 | } |
| 30 | |
| 31 | for _, iface := range ifaceByDeviceIndex { |
| 32 | deviceID := strings.TrimSpace(iface.DeviceID) |
| 33 | if deviceID == "" { |
| 34 | continue |
| 35 | } |
| 36 | ifaceMAC := normalizeMAC(iface.MAC) |
| 37 | if ifaceMAC == "" { |
| 38 | continue |
| 39 | } |
| 40 | if aliases[deviceID] == nil { |
| 41 | aliases[deviceID] = make(map[string]struct{}) |
| 42 | } |
| 43 | aliases[deviceID]["mac:"+ifaceMAC] = struct{}{} |
| 44 | } |
| 45 | |
| 46 | out := make(map[string][]string, len(aliases)) |
| 47 | for deviceID, set := range aliases { |
| 48 | values := sortedTopologySet(set) |
| 49 | if len(values) == 0 { |
| 50 | continue |
| 51 | } |
| 52 | out[deviceID] = values |
| 53 | } |
| 54 | |
| 55 | return out |
| 56 | } |
| 57 | |
| 58 | func buildFDBReporterObservations(macLinks []bridgeMacLinkRecord) fdbReporterObservation { |
| 59 | obs := fdbReporterObservation{ |
| 60 | byEndpoint: make(map[string]map[string]map[string]struct{}), |
| 61 | byReporter: make(map[string]map[string]map[string]struct{}), |
| 62 | } |
| 63 | for _, link := range macLinks { |
| 64 | if strings.ToLower(strings.TrimSpace(link.method)) != "fdb" { |
| 65 | continue |
| 66 | } |
| 67 | reporterID := strings.TrimSpace(link.port.deviceID) |
| 68 | if reporterID == "" { |
| 69 | continue |
| 70 | } |
| 71 | endpointID := normalizeFDBEndpointID(link.endpointID) |
| 72 | if endpointID == "" { |
| 73 | continue |
| 74 | } |
| 75 | portKey := bridgePortObservationKey(link.port) |
| 76 | if portKey == "" { |
| 77 | continue |
| 78 | } |
| 79 | |
| 80 | byEndpointReporter := obs.byEndpoint[endpointID] |
| 81 | if byEndpointReporter == nil { |
| 82 | byEndpointReporter = make(map[string]map[string]struct{}) |
| 83 | obs.byEndpoint[endpointID] = byEndpointReporter |
| 84 | } |
| 85 | if byEndpointReporter[reporterID] == nil { |
| 86 | byEndpointReporter[reporterID] = make(map[string]struct{}) |
| 87 | } |
| 88 | byEndpointReporter[reporterID][portKey] = struct{}{} |
| 89 | |
| 90 | byReporterEndpoint := obs.byReporter[reporterID] |
| 91 | if byReporterEndpoint == nil { |
| 92 | byReporterEndpoint = make(map[string]map[string]struct{}) |
| 93 | obs.byReporter[reporterID] = byReporterEndpoint |
| 94 | } |
| 95 | if byReporterEndpoint[endpointID] == nil { |
| 96 | byReporterEndpoint[endpointID] = make(map[string]struct{}) |
| 97 | } |
| 98 | byReporterEndpoint[endpointID][portKey] = struct{}{} |
| 99 | } |
| 100 | return obs |
| 101 | } |
| 102 | |
| 103 | func normalizeFDBEndpointID(endpointID string) string { |
| 104 | kind, value, ok := strings.Cut(strings.TrimSpace(endpointID), ":") |
| 105 | if !ok { |
| 106 | return "" |
| 107 | } |
| 108 | switch strings.ToLower(strings.TrimSpace(kind)) { |
| 109 | case "mac": |
| 110 | if mac := normalizeMAC(value); mac != "" { |
| 111 | return "mac:" + mac |
| 112 | } |
| 113 | } |
| 114 | return "" |
| 115 | } |
| 116 | |
| 117 | func buildFDBAliasOwnerMap(reporterAliases map[string][]string) map[string]map[string]struct{} { |
| 118 | if len(reporterAliases) == 0 { |
| 119 | return nil |
| 120 | } |
| 121 | aliasOwners := make(map[string]map[string]struct{}) |
| 122 | reporterIDs := make([]string, 0, len(reporterAliases)) |
| 123 | for reporterID := range reporterAliases { |
| 124 | reporterID = strings.TrimSpace(reporterID) |
| 125 | if reporterID == "" { |
| 126 | continue |
| 127 | } |
| 128 | reporterIDs = append(reporterIDs, reporterID) |
| 129 | } |
| 130 | sort.Strings(reporterIDs) |
| 131 | for _, reporterID := range reporterIDs { |
| 132 | aliases := uniqueTopologyStrings(reporterAliases[reporterID]) |
| 133 | for _, alias := range aliases { |
| 134 | alias = normalizeFDBEndpointID(alias) |
| 135 | if alias == "" { |
| 136 | continue |
| 137 | } |
| 138 | owners := aliasOwners[alias] |
| 139 | if owners == nil { |
| 140 | owners = make(map[string]struct{}) |
| 141 | aliasOwners[alias] = owners |
| 142 | } |
| 143 | owners[reporterID] = struct{}{} |
| 144 | } |
| 145 | } |
| 146 | if len(aliasOwners) == 0 { |
| 147 | return nil |
| 148 | } |
| 149 | return aliasOwners |
| 150 | } |