| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | package l2topology |
| 4 | |
| 5 | import ( |
| 6 | "sort" |
| 7 | "strconv" |
| 8 | "strings" |
| 9 | ) |
| 10 | |
| 11 | func collectTopologyEndpointIDs( |
| 12 | endpointMatchByID map[string]Match, |
| 13 | endpointLabelsByID map[string]map[string]string, |
| 14 | endpointSegmentCandidates map[string][]string, |
| 15 | rawFDBObservations fdbReporterObservation, |
| 16 | filteredFDBObservations fdbReporterObservation, |
| 17 | ) []string { |
| 18 | set := make(map[string]struct{}) |
| 19 | for endpointID := range endpointMatchByID { |
| 20 | endpointID = strings.TrimSpace(endpointID) |
| 21 | if endpointID != "" { |
| 22 | set[endpointID] = struct{}{} |
| 23 | } |
| 24 | } |
| 25 | for endpointID := range endpointLabelsByID { |
| 26 | endpointID = strings.TrimSpace(endpointID) |
| 27 | if endpointID != "" { |
| 28 | set[endpointID] = struct{}{} |
| 29 | } |
| 30 | } |
| 31 | for endpointID := range endpointSegmentCandidates { |
| 32 | endpointID = strings.TrimSpace(endpointID) |
| 33 | if endpointID != "" { |
| 34 | set[endpointID] = struct{}{} |
| 35 | } |
| 36 | } |
| 37 | for endpointID := range rawFDBObservations.byEndpoint { |
| 38 | endpointID = strings.TrimSpace(endpointID) |
| 39 | if endpointID != "" { |
| 40 | set[endpointID] = struct{}{} |
| 41 | } |
| 42 | } |
| 43 | for endpointID := range filteredFDBObservations.byEndpoint { |
| 44 | endpointID = strings.TrimSpace(endpointID) |
| 45 | if endpointID != "" { |
| 46 | set[endpointID] = struct{}{} |
| 47 | } |
| 48 | } |
| 49 | return sortedTopologySet(set) |
| 50 | } |
| 51 | |
| 52 | func buildFDBEndpointReporterHints(macLinks []bridgeMacLinkRecord) map[string]map[string][]bridgePortRef { |
| 53 | if len(macLinks) == 0 { |
| 54 | return nil |
| 55 | } |
| 56 | |
| 57 | byEndpointReporterPorts := make(map[string]map[string]map[string]bridgePortRef) |
| 58 | for _, link := range macLinks { |
| 59 | if strings.ToLower(strings.TrimSpace(link.method)) != "fdb" { |
| 60 | continue |
| 61 | } |
| 62 | endpointID := normalizeFDBEndpointID(link.endpointID) |
| 63 | reporterID := strings.TrimSpace(link.port.deviceID) |
| 64 | portKey := bridgePortObservationVLANKey(link.port) |
| 65 | if endpointID == "" || reporterID == "" || portKey == "" { |
| 66 | continue |
| 67 | } |
| 68 | reporters := byEndpointReporterPorts[endpointID] |
| 69 | if reporters == nil { |
| 70 | reporters = make(map[string]map[string]bridgePortRef) |
| 71 | byEndpointReporterPorts[endpointID] = reporters |
| 72 | } |
| 73 | ports := reporters[reporterID] |
| 74 | if ports == nil { |
| 75 | ports = make(map[string]bridgePortRef) |
| 76 | reporters[reporterID] = ports |
| 77 | } |
| 78 | ports[portKey] = link.port |
| 79 | } |
| 80 | |
| 81 | out := make(map[string]map[string][]bridgePortRef, len(byEndpointReporterPorts)) |
| 82 | for endpointID, reporters := range byEndpointReporterPorts { |
| 83 | reporterHints := make(map[string][]bridgePortRef, len(reporters)) |
| 84 | reporterIDs := make([]string, 0, len(reporters)) |
| 85 | for reporterID := range reporters { |
| 86 | reporterIDs = append(reporterIDs, reporterID) |
| 87 | } |
| 88 | sort.Strings(reporterIDs) |
| 89 | for _, reporterID := range reporterIDs { |
| 90 | portsMap := reporters[reporterID] |
| 91 | if len(portsMap) == 0 { |
| 92 | continue |
| 93 | } |
| 94 | portKeys := make([]string, 0, len(portsMap)) |
| 95 | for key := range portsMap { |
| 96 | portKeys = append(portKeys, key) |
| 97 | } |
| 98 | sort.Strings(portKeys) |
| 99 | ports := make([]bridgePortRef, 0, len(portKeys)) |
| 100 | for _, key := range portKeys { |
| 101 | ports = append(ports, portsMap[key]) |
| 102 | } |
| 103 | reporterHints[reporterID] = ports |
| 104 | } |
| 105 | if len(reporterHints) > 0 { |
| 106 | out[endpointID] = reporterHints |
| 107 | } |
| 108 | } |
| 109 | if len(out) == 0 { |
| 110 | return nil |
| 111 | } |
| 112 | return out |
| 113 | } |
| 114 | |
| 115 | func buildSegmentReporterIndex( |
| 116 | segmentIDs []string, |
| 117 | segmentByID map[string]*bridgeDomainSegment, |
| 118 | ) segmentReporterIndex { |
| 119 | index := segmentReporterIndex{ |
| 120 | byDevice: make(map[string]map[string]struct{}), |
| 121 | byDeviceIfIndex: make(map[string]map[string]struct{}), |
| 122 | byDeviceIfName: make(map[string]map[string]struct{}), |
| 123 | } |
| 124 | for _, segmentID := range segmentIDs { |
| 125 | segment := segmentByID[segmentID] |
| 126 | if segment == nil { |
| 127 | continue |
| 128 | } |
| 129 | for _, port := range segment.ports { |
| 130 | deviceID := strings.TrimSpace(port.deviceID) |
| 131 | if deviceID == "" { |
| 132 | continue |
| 133 | } |
| 134 | addStringSet(index.byDevice, deviceID, segmentID) |
| 135 | if port.ifIndex > 0 { |
| 136 | addStringSet(index.byDeviceIfIndex, deviceID+keySep+strconv.Itoa(port.ifIndex), segmentID) |
| 137 | } |
| 138 | if ifName := strings.ToLower(strings.TrimSpace(port.ifName)); ifName != "" { |
| 139 | addStringSet(index.byDeviceIfName, deviceID+keySep+ifName, segmentID) |
| 140 | } |
| 141 | } |
| 142 | } |
| 143 | return index |
| 144 | } |
| 145 | |
| 146 | func addStringSet(out map[string]map[string]struct{}, key string, value string) { |
| 147 | key = strings.TrimSpace(key) |
| 148 | value = strings.TrimSpace(value) |
| 149 | if key == "" || value == "" { |
| 150 | return |
| 151 | } |
| 152 | set := out[key] |
| 153 | if set == nil { |
| 154 | set = make(map[string]struct{}) |
| 155 | out[key] = set |
| 156 | } |
| 157 | set[value] = struct{}{} |
| 158 | } |
| 159 | |
| 160 | func probableCandidateSegmentsFromReporterHints( |
| 161 | endpointLabels map[string]string, |
| 162 | fdbReporters map[string]map[string]struct{}, |
| 163 | reporterSegmentIndex segmentReporterIndex, |
| 164 | aliasOwnerIDs map[string]map[string]struct{}, |
| 165 | managedDeviceIDs map[string]struct{}, |
| 166 | ) []string { |
| 167 | deviceIDs := resolveTopologyEndpointDeviceHints( |
| 168 | topologyEndpointLabelDeviceIDs(endpointLabels), |
| 169 | aliasOwnerIDs, |
| 170 | ) |
| 171 | if len(deviceIDs) == 0 { |
| 172 | for reporterID := range fdbReporters { |
| 173 | reporterID = strings.TrimSpace(reporterID) |
| 174 | if reporterID == "" { |
| 175 | continue |
| 176 | } |
| 177 | deviceIDs = append(deviceIDs, reporterID) |
| 178 | } |
| 179 | deviceIDs = resolveTopologyEndpointDeviceHints(deviceIDs, aliasOwnerIDs) |
| 180 | } |
| 181 | deviceIDs = filterManagedDeviceHints(deviceIDs, managedDeviceIDs) |
| 182 | if len(deviceIDs) == 0 { |
| 183 | return nil |
| 184 | } |
| 185 | |
| 186 | ifIndexes := labelsCSVToSlice(endpointLabels, "learned_if_indexes") |
| 187 | ifNames := labelsCSVToSlice(endpointLabels, "learned_if_names") |
| 188 | hasPortHints := false |
| 189 | for _, ifIndex := range ifIndexes { |
| 190 | if strings.TrimSpace(ifIndex) != "" { |
| 191 | hasPortHints = true |
| 192 | break |
| 193 | } |
| 194 | } |
| 195 | if !hasPortHints { |
| 196 | for _, ifName := range ifNames { |
| 197 | if strings.TrimSpace(ifName) != "" { |
| 198 | hasPortHints = true |
| 199 | break |
| 200 | } |
| 201 | } |
| 202 | } |
| 203 | candidateSet := make(map[string]struct{}) |
| 204 | |
| 205 | for _, deviceID := range deviceIDs { |
| 206 | for _, ifIndex := range ifIndexes { |
| 207 | ifIndex = strings.TrimSpace(ifIndex) |
| 208 | if ifIndex == "" { |
| 209 | continue |
| 210 | } |
| 211 | for segmentID := range reporterSegmentIndex.byDeviceIfIndex[deviceID+keySep+ifIndex] { |
| 212 | candidateSet[segmentID] = struct{}{} |
| 213 | } |
| 214 | } |
| 215 | for _, ifName := range ifNames { |
| 216 | ifName = strings.ToLower(strings.TrimSpace(ifName)) |
| 217 | if ifName == "" { |
| 218 | continue |
| 219 | } |
| 220 | for segmentID := range reporterSegmentIndex.byDeviceIfName[deviceID+keySep+ifName] { |
| 221 | candidateSet[segmentID] = struct{}{} |
| 222 | } |
| 223 | } |
| 224 | } |
| 225 | |
| 226 | if len(candidateSet) == 0 && !hasPortHints { |
| 227 | for _, deviceID := range deviceIDs { |
| 228 | for segmentID := range reporterSegmentIndex.byDevice[deviceID] { |
| 229 | candidateSet[segmentID] = struct{}{} |
| 230 | } |
| 231 | } |
| 232 | } |
| 233 | if len(candidateSet) == 0 { |
| 234 | return nil |
| 235 | } |
| 236 | return sortedTopologySet(candidateSet) |
| 237 | } |