| 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 | var interfaceNameLookupSanitizer = strings.NewReplacer( |
| 12 | " ", "", |
| 13 | "-", "", |
| 14 | "_", "", |
| 15 | ".", "", |
| 16 | "\t", "", |
| 17 | "\n", "", |
| 18 | "\r", "", |
| 19 | ) |
| 20 | |
| 21 | func deviceIfNameKey(deviceID, ifName string) string { |
| 22 | return strings.TrimSpace(deviceID) + keySep + strings.ToLower(strings.TrimSpace(ifName)) |
| 23 | } |
| 24 | |
| 25 | func interfaceNameLookupAliases(values ...string) []string { |
| 26 | set := make(map[string]struct{}, len(values)*2) |
| 27 | for _, value := range values { |
| 28 | trimmed := strings.TrimSpace(value) |
| 29 | if trimmed == "" { |
| 30 | continue |
| 31 | } |
| 32 | set[trimmed] = struct{}{} |
| 33 | if normalized := normalizeInterfaceNameForLookup(trimmed); normalized != "" && normalized != strings.ToLower(trimmed) { |
| 34 | set[normalized] = struct{}{} |
| 35 | } |
| 36 | } |
| 37 | if len(set) == 0 { |
| 38 | return nil |
| 39 | } |
| 40 | out := make([]string, 0, len(set)) |
| 41 | for value := range set { |
| 42 | out = append(out, value) |
| 43 | } |
| 44 | sort.Strings(out) |
| 45 | return out |
| 46 | } |
| 47 | |
| 48 | func normalizeInterfaceNameForLookup(value string) string { |
| 49 | value = strings.TrimSpace(strings.ToLower(value)) |
| 50 | if value == "" { |
| 51 | return "" |
| 52 | } |
| 53 | return interfaceNameLookupSanitizer.Replace(value) |
| 54 | } |
| 55 | |
| 56 | func resolveIfIndexByPortName(deviceID, port string, ifIndexByDeviceName map[string]int) int { |
| 57 | deviceID = strings.TrimSpace(deviceID) |
| 58 | port = strings.TrimSpace(port) |
| 59 | if deviceID == "" || port == "" { |
| 60 | return 0 |
| 61 | } |
| 62 | if idx, ok := ifIndexByDeviceName[deviceIfNameKey(deviceID, port)]; ok && idx > 0 { |
| 63 | return idx |
| 64 | } |
| 65 | if normalized := normalizeInterfaceNameForLookup(port); normalized != "" { |
| 66 | if idx, ok := ifIndexByDeviceName[deviceIfNameKey(deviceID, normalized)]; ok && idx > 0 { |
| 67 | return idx |
| 68 | } |
| 69 | } |
| 70 | if parsed, err := strconv.Atoi(port); err == nil && parsed > 0 { |
| 71 | return parsed |
| 72 | } |
| 73 | return 0 |
| 74 | } |
| 75 | |
| 76 | func topologyIdentityIndexOverlaps(index map[string]struct{}, keys []string) bool { |
| 77 | if len(index) == 0 || len(keys) == 0 { |
| 78 | return false |
| 79 | } |
| 80 | for _, key := range keys { |
| 81 | if _, ok := index[key]; ok { |
| 82 | return true |
| 83 | } |
| 84 | } |
| 85 | return false |
| 86 | } |
| 87 | |
| 88 | func addTopologyIdentityKeys(index map[string]struct{}, keys []string) { |
| 89 | if index == nil || len(keys) == 0 { |
| 90 | return |
| 91 | } |
| 92 | for _, key := range keys { |
| 93 | index[key] = struct{}{} |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | func buildDeviceIdentityKeySetByID( |
| 98 | deviceByID map[string]Device, |
| 99 | adjacencies []Adjacency, |
| 100 | ifaceByDeviceIndex map[string]Interface, |
| 101 | ) map[string]topologyIdentityKeySet { |
| 102 | if len(deviceByID) == 0 { |
| 103 | return nil |
| 104 | } |
| 105 | out := make(map[string]topologyIdentityKeySet, len(deviceByID)) |
| 106 | for _, device := range deviceByID { |
| 107 | deviceID := strings.TrimSpace(device.ID) |
| 108 | if deviceID == "" { |
| 109 | continue |
| 110 | } |
| 111 | keys := topologyMatchIdentityKeys( |
| 112 | deviceToTopologyActor(device, "", "", "", topologyDeviceInterfaceSummary{}, nil).Match, |
| 113 | ) |
| 114 | if len(keys) == 0 { |
| 115 | continue |
| 116 | } |
| 117 | set := make(topologyIdentityKeySet, len(keys)) |
| 118 | for _, key := range keys { |
| 119 | key = strings.TrimSpace(key) |
| 120 | if key == "" { |
| 121 | continue |
| 122 | } |
| 123 | set[key] = struct{}{} |
| 124 | } |
| 125 | if len(set) == 0 { |
| 126 | continue |
| 127 | } |
| 128 | out[deviceID] = set |
| 129 | } |
| 130 | for _, adjacency := range adjacencies { |
| 131 | protocol := strings.ToLower(strings.TrimSpace(adjacency.Protocol)) |
| 132 | if protocol != "lldp" && protocol != "cdp" { |
| 133 | continue |
| 134 | } |
| 135 | if mac := normalizeMAC(adjacency.SourcePort); mac != "" { |
| 136 | deviceID := strings.TrimSpace(adjacency.SourceID) |
| 137 | if deviceID != "" { |
| 138 | if out[deviceID] == nil { |
| 139 | out[deviceID] = make(topologyIdentityKeySet) |
| 140 | } |
| 141 | out[deviceID]["hw:"+mac] = struct{}{} |
| 142 | } |
| 143 | } |
| 144 | if mac := normalizeMAC(adjacency.TargetPort); mac != "" { |
| 145 | deviceID := strings.TrimSpace(adjacency.TargetID) |
| 146 | if deviceID != "" { |
| 147 | if out[deviceID] == nil { |
| 148 | out[deviceID] = make(topologyIdentityKeySet) |
| 149 | } |
| 150 | out[deviceID]["hw:"+mac] = struct{}{} |
| 151 | } |
| 152 | } |
| 153 | } |
| 154 | for _, iface := range ifaceByDeviceIndex { |
| 155 | deviceID := strings.TrimSpace(iface.DeviceID) |
| 156 | if deviceID == "" { |
| 157 | continue |
| 158 | } |
| 159 | ifaceMAC := normalizeMAC(iface.MAC) |
| 160 | if ifaceMAC == "" { |
| 161 | continue |
| 162 | } |
| 163 | if out[deviceID] == nil { |
| 164 | out[deviceID] = make(topologyIdentityKeySet) |
| 165 | } |
| 166 | out[deviceID]["hw:"+ifaceMAC] = struct{}{} |
| 167 | } |
| 168 | if len(out) == 0 { |
| 169 | return nil |
| 170 | } |
| 171 | return out |
| 172 | } |
| 173 | |
| 174 | func topologyMatchIdentityKeys(match Match) []string { |
| 175 | seen := make(map[string]struct{}, 8) |
| 176 | add := func(kind, value string) { |
| 177 | value = strings.TrimSpace(value) |
| 178 | if value == "" { |
| 179 | return |
| 180 | } |
| 181 | key := kind + ":" + value |
| 182 | seen[key] = struct{}{} |
| 183 | } |
| 184 | |
| 185 | for _, value := range match.ChassisIDs { |
| 186 | value = strings.TrimSpace(value) |
| 187 | if value == "" { |
| 188 | continue |
| 189 | } |
| 190 | if mac := normalizeMAC(value); mac != "" { |
| 191 | add("hw", mac) |
| 192 | continue |
| 193 | } |
| 194 | if ip := normalizeTopologyIP(value); ip != "" { |
| 195 | add("ip", ip) |
| 196 | continue |
| 197 | } |
| 198 | add("chassis", strings.ToLower(value)) |
| 199 | } |
| 200 | |
| 201 | for _, value := range match.MacAddresses { |
| 202 | if mac := normalizeMAC(value); mac != "" { |
| 203 | add("hw", mac) |
| 204 | } |
| 205 | } |
| 206 | for _, value := range match.IPAddresses { |
| 207 | if ip := normalizeTopologyIP(value); ip != "" { |
| 208 | add("ip", ip) |
| 209 | continue |
| 210 | } |
| 211 | add("ipraw", strings.ToLower(strings.TrimSpace(value))) |
| 212 | } |
| 213 | for _, value := range match.Hostnames { |
| 214 | add("hostname", strings.ToLower(strings.TrimSpace(value))) |
| 215 | } |
| 216 | for _, value := range match.DNSNames { |
| 217 | add("dns", strings.ToLower(strings.TrimSpace(value))) |
| 218 | } |
| 219 | if sysName := strings.TrimSpace(match.SysName); sysName != "" { |
| 220 | add("sysname", strings.ToLower(sysName)) |
| 221 | } |
| 222 | |
| 223 | if len(seen) == 0 { |
| 224 | return nil |
| 225 | } |
| 226 | |
| 227 | keys := make([]string, 0, len(seen)) |
| 228 | for key := range seen { |
| 229 | keys = append(keys, key) |
| 230 | } |
| 231 | sort.Strings(keys) |
| 232 | return keys |
| 233 | } |
| 234 | |
| 235 | func topologyMatchHardwareIdentityKeys(match Match) []string { |
| 236 | seen := make(map[string]struct{}, len(match.MacAddresses)+len(match.ChassisIDs)) |
| 237 | add := func(value string) { |
| 238 | if mac := normalizeMAC(value); mac != "" { |
| 239 | seen["hw:"+mac] = struct{}{} |
| 240 | } |
| 241 | } |
| 242 | |
| 243 | for _, value := range match.MacAddresses { |
| 244 | add(value) |
| 245 | } |
| 246 | for _, value := range match.ChassisIDs { |
| 247 | add(value) |
| 248 | } |
| 249 | |
| 250 | if len(seen) == 0 { |
| 251 | return nil |
| 252 | } |
| 253 | keys := make([]string, 0, len(seen)) |
| 254 | for key := range seen { |
| 255 | keys = append(keys, key) |
| 256 | } |
| 257 | sort.Strings(keys) |
| 258 | return keys |
| 259 | } |
| 260 | |
| 261 | func endpointMatchOverlappingKnownDeviceIDs( |
| 262 | endpointMatch Match, |
| 263 | deviceIdentityByID map[string]topologyIdentityKeySet, |
| 264 | ) []string { |
| 265 | if len(deviceIdentityByID) == 0 { |
| 266 | return nil |
| 267 | } |
| 268 | |
| 269 | endpointKeys := topologyMatchHardwareIdentityKeys(endpointMatch) |
| 270 | if len(endpointKeys) == 0 { |
| 271 | endpointKeys = topologyMatchIdentityKeys(endpointMatch) |
| 272 | } |
| 273 | if len(endpointKeys) == 0 { |
| 274 | return nil |
| 275 | } |
| 276 | |
| 277 | deviceIDs := make([]string, 0, len(deviceIdentityByID)) |
| 278 | for deviceID := range deviceIdentityByID { |
| 279 | deviceID = strings.TrimSpace(deviceID) |
| 280 | if deviceID == "" { |
| 281 | continue |
| 282 | } |
| 283 | deviceIDs = append(deviceIDs, deviceID) |
| 284 | } |
| 285 | sort.Strings(deviceIDs) |
| 286 | if len(deviceIDs) == 0 { |
| 287 | return nil |
| 288 | } |
| 289 | |
| 290 | matches := make([]string, 0, 2) |
| 291 | for _, deviceID := range deviceIDs { |
| 292 | deviceKeys := deviceIdentityByID[deviceID] |
| 293 | if len(deviceKeys) == 0 { |
| 294 | continue |
| 295 | } |
| 296 | for _, endpointKey := range endpointKeys { |
| 297 | if _, ok := deviceKeys[endpointKey]; ok { |
| 298 | matches = append(matches, deviceID) |
| 299 | break |
| 300 | } |
| 301 | } |
| 302 | } |
| 303 | if len(matches) == 0 { |
| 304 | return nil |
| 305 | } |
| 306 | return matches |
| 307 | } |
| 308 | |
| 309 | func normalizeTopologyIP(value string) string { |
| 310 | value = strings.TrimSpace(value) |
| 311 | if value == "" { |
| 312 | return "" |
| 313 | } |
| 314 | addr := parseAddr(value) |
| 315 | if !addr.IsValid() { |
| 316 | return "" |
| 317 | } |
| 318 | return addr.Unmap().String() |
| 319 | } |