| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | package l2topology |
| 4 | |
| 5 | import ( |
| 6 | "fmt" |
| 7 | "net/netip" |
| 8 | "strconv" |
| 9 | "strings" |
| 10 | ) |
| 11 | |
| 12 | func (s *l2BuildState) registerObservations(observations []L2Observation) error { |
| 13 | for _, obs := range observations { |
| 14 | if err := s.registerObservation(obs); err != nil { |
| 15 | return err |
| 16 | } |
| 17 | } |
| 18 | return nil |
| 19 | } |
| 20 | |
| 21 | func (s *l2BuildState) registerObservation(obs L2Observation) error { |
| 22 | deviceID := strings.TrimSpace(obs.DeviceID) |
| 23 | if deviceID == "" { |
| 24 | return fmt.Errorf("observation with empty device id") |
| 25 | } |
| 26 | |
| 27 | device := Device{ |
| 28 | ID: deviceID, |
| 29 | Hostname: strings.TrimSpace(obs.Hostname), |
| 30 | SysObject: strings.TrimSpace(obs.SysObjectID), |
| 31 | ChassisID: strings.TrimSpace(obs.ChassisID), |
| 32 | } |
| 33 | if primaryMAC := primaryL2MACIdentity(obs.ChassisID, obs.BaseBridgeAddress); primaryMAC != "" { |
| 34 | device.ChassisID = primaryMAC |
| 35 | } |
| 36 | if !obs.Inferred { |
| 37 | s.managedObservationByDeviceID[deviceID] = true |
| 38 | } |
| 39 | if device.Hostname == "" { |
| 40 | device.Hostname = device.ID |
| 41 | } |
| 42 | if addr := parseAddr(obs.ManagementIP); addr.IsValid() { |
| 43 | device.Addresses = []netip.Addr{addr} |
| 44 | } |
| 45 | if len(device.Labels) == 0 { |
| 46 | device.Labels = make(map[string]string) |
| 47 | } |
| 48 | observedProtocols := observationProtocolsUsed(obs) |
| 49 | if existing, ok := s.devices[device.ID]; ok { |
| 50 | device = mergeObservedDevice(existing, device) |
| 51 | if device.Labels == nil { |
| 52 | device.Labels = make(map[string]string) |
| 53 | } |
| 54 | for protocol := range csvToTopologySet(existing.Labels["protocols_observed"]) { |
| 55 | observedProtocols[protocol] = struct{}{} |
| 56 | } |
| 57 | } |
| 58 | if len(observedProtocols) > 0 { |
| 59 | device.Labels["protocols_observed"] = setToCSV(observedProtocols) |
| 60 | } |
| 61 | s.devices[device.ID] = device |
| 62 | |
| 63 | if host := canonicalHost(device.Hostname); host != "" { |
| 64 | s.hostToID[host] = device.ID |
| 65 | } |
| 66 | if ip := canonicalIP(obs.ManagementIP); ip != "" { |
| 67 | s.ipToID[ip] = device.ID |
| 68 | } |
| 69 | if mac := primaryL2MACIdentity(device.ChassisID, ""); mac != "" { |
| 70 | if _, exists := s.macToID[mac]; !exists { |
| 71 | s.macToID[mac] = device.ID |
| 72 | } |
| 73 | s.chassisToID[canonicalToken(mac)] = device.ID |
| 74 | } else if chassis := canonicalToken(device.ChassisID); chassis != "" { |
| 75 | s.chassisToID[chassis] = device.ID |
| 76 | } |
| 77 | if bridgeAddr := canonicalBridgeAddr(obs.BaseBridgeAddress, device.ChassisID); bridgeAddr != "" { |
| 78 | if _, exists := s.bridgeAddrToID[bridgeAddr]; !exists { |
| 79 | s.bridgeAddrToID[bridgeAddr] = device.ID |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | for _, iface := range obs.Interfaces { |
| 84 | if iface.IfIndex <= 0 { |
| 85 | continue |
| 86 | } |
| 87 | ifName := strings.TrimSpace(iface.IfName) |
| 88 | ifDescr := strings.TrimSpace(iface.IfDescr) |
| 89 | if ifName == "" { |
| 90 | ifName = ifDescr |
| 91 | } |
| 92 | if ifDescr == "" { |
| 93 | ifDescr = ifName |
| 94 | } |
| 95 | if ifName == "" { |
| 96 | continue |
| 97 | } |
| 98 | engIface := Interface{ |
| 99 | DeviceID: device.ID, |
| 100 | IfIndex: iface.IfIndex, |
| 101 | IfName: ifName, |
| 102 | IfDescr: ifDescr, |
| 103 | MAC: normalizeMAC(iface.MAC), |
| 104 | } |
| 105 | if ifType := strings.TrimSpace(iface.InterfaceType); ifType != "" { |
| 106 | if engIface.Labels == nil { |
| 107 | engIface.Labels = make(map[string]string) |
| 108 | } |
| 109 | engIface.Labels["if_type"] = ifType |
| 110 | } |
| 111 | if admin := strings.TrimSpace(iface.AdminStatus); admin != "" { |
| 112 | if engIface.Labels == nil { |
| 113 | engIface.Labels = make(map[string]string) |
| 114 | } |
| 115 | engIface.Labels["admin_status"] = admin |
| 116 | } |
| 117 | if oper := strings.TrimSpace(iface.OperStatus); oper != "" { |
| 118 | if engIface.Labels == nil { |
| 119 | engIface.Labels = make(map[string]string) |
| 120 | } |
| 121 | engIface.Labels["oper_status"] = oper |
| 122 | } |
| 123 | if ifAlias := strings.TrimSpace(iface.IfAlias); ifAlias != "" { |
| 124 | if engIface.Labels == nil { |
| 125 | engIface.Labels = make(map[string]string) |
| 126 | } |
| 127 | engIface.Labels["if_alias"] = ifAlias |
| 128 | } |
| 129 | if iface.SpeedBps > 0 { |
| 130 | if engIface.Labels == nil { |
| 131 | engIface.Labels = make(map[string]string) |
| 132 | } |
| 133 | engIface.Labels["speed_bps"] = strconv.FormatInt(iface.SpeedBps, 10) |
| 134 | } |
| 135 | if iface.LastChange > 0 { |
| 136 | if engIface.Labels == nil { |
| 137 | engIface.Labels = make(map[string]string) |
| 138 | } |
| 139 | engIface.Labels["last_change"] = strconv.FormatInt(iface.LastChange, 10) |
| 140 | } |
| 141 | if duplex := strings.TrimSpace(iface.Duplex); duplex != "" { |
| 142 | if engIface.Labels == nil { |
| 143 | engIface.Labels = make(map[string]string) |
| 144 | } |
| 145 | engIface.Labels["duplex"] = duplex |
| 146 | } |
| 147 | if engIface.MAC != "" { |
| 148 | if engIface.Labels == nil { |
| 149 | engIface.Labels = make(map[string]string) |
| 150 | } |
| 151 | engIface.Labels["mac"] = engIface.MAC |
| 152 | } |
| 153 | s.interfaces[ifaceKey(engIface)] = engIface |
| 154 | s.ifNameByDeviceIfIndex[deviceIfIndexKey(device.ID, iface.IfIndex)] = ifName |
| 155 | } |
| 156 | |
| 157 | return nil |
| 158 | } |
| 159 | |
| 160 | func mergeObservedDevice(existing, incoming Device) Device { |
| 161 | out := existing |
| 162 | if strings.TrimSpace(out.ID) == "" { |
| 163 | out.ID = incoming.ID |
| 164 | } |
| 165 | if strings.TrimSpace(incoming.Hostname) != "" && (strings.TrimSpace(out.Hostname) == "" || out.Hostname == out.ID) { |
| 166 | out.Hostname = incoming.Hostname |
| 167 | } |
| 168 | if strings.TrimSpace(out.SysObject) == "" { |
| 169 | out.SysObject = incoming.SysObject |
| 170 | } |
| 171 | if strings.TrimSpace(out.ChassisID) == "" { |
| 172 | out.ChassisID = incoming.ChassisID |
| 173 | } |
| 174 | out.Addresses = mergeObservedDeviceAddresses(existing.Addresses, incoming.Addresses) |
| 175 | out.Labels = mergeObservedDeviceLabels(existing.Labels, incoming.Labels) |
| 176 | if strings.TrimSpace(out.Hostname) == "" { |
| 177 | out.Hostname = out.ID |
| 178 | } |
| 179 | return out |
| 180 | } |
| 181 | |
| 182 | func mergeObservedDeviceAddresses(existing, incoming []netip.Addr) []netip.Addr { |
| 183 | if len(existing) == 0 && len(incoming) == 0 { |
| 184 | return nil |
| 185 | } |
| 186 | merged := make(map[string]netip.Addr, len(existing)+len(incoming)) |
| 187 | for _, addr := range existing { |
| 188 | if addr.IsValid() { |
| 189 | merged[addr.String()] = addr |
| 190 | } |
| 191 | } |
| 192 | for _, addr := range incoming { |
| 193 | if addr.IsValid() { |
| 194 | merged[addr.String()] = addr |
| 195 | } |
| 196 | } |
| 197 | return sortedAddrValues(merged) |
| 198 | } |
| 199 | |
| 200 | func mergeObservedDeviceLabels(existing, incoming map[string]string) map[string]string { |
| 201 | if len(existing) == 0 && len(incoming) == 0 { |
| 202 | return nil |
| 203 | } |
| 204 | out := make(map[string]string, len(existing)+len(incoming)) |
| 205 | for key, value := range existing { |
| 206 | if value != "" { |
| 207 | out[key] = value |
| 208 | } |
| 209 | } |
| 210 | for key, value := range incoming { |
| 211 | if value == "" { |
| 212 | continue |
| 213 | } |
| 214 | if strings.TrimSpace(out[key]) == "" { |
| 215 | out[key] = value |
| 216 | } |
| 217 | } |
| 218 | if len(out) == 0 { |
| 219 | return nil |
| 220 | } |
| 221 | return out |
| 222 | } |