Your Name
468 Zeilen
14 KiB
Go
468 Zeilen
14 KiB
Go
package topology
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import (
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"fmt"
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"network-topology-discovery/pkg/models"
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"strings"
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)
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// Builder 拓扑构建器
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type Builder struct {
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devices []models.Device
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}
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// NewBuilder 创建拓扑构建器
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func NewBuilder() *Builder {
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return &Builder{}
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}
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// AddDevice 添加设备（按IP去重）
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func (b *Builder) AddDevice(device models.Device) {
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for i, existing := range b.devices {
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if existing.IP == device.IP {
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b.devices[i] = device // 覆盖更新
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return
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}
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}
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b.devices = append(b.devices, device)
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}
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// AddDevices 批量添加设备
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func (b *Builder) AddDevices(devices []models.Device) {
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b.devices = append(b.devices, devices...)
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}
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// RemoveDevice 根据ID或IP移除设备
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func (b *Builder) RemoveDevice(id string) {
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for i, d := range b.devices {
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if d.ID == id || d.IP == id {
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b.devices = append(b.devices[:i], b.devices[i+1:]...)
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return
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}
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}
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}
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// Build 构建拓扑图
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func (b *Builder) Build() models.TopologyGraph {
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graph := models.TopologyGraph{
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Nodes: make([]models.TopologyNode, 0),
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Edges: make([]models.TopologyEdge, 0),
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}
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// 构建节点
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nodeMap := make(map[string]models.TopologyNode)
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for _, device := range b.devices {
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// 优先使用主机名,如果没有则使用IP作为显示名
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hostname := device.Hostname
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if hostname == "" {
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hostname = device.IP
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}
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node := models.TopologyNode{
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ID: device.IP,
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IP: device.IP,
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Hostname: hostname,
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Type: string(device.Type),
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Icon: getDeviceIcon(device.Type),
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}
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nodeMap[device.IP] = node
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graph.Nodes = append(graph.Nodes, node)
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}
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fmt.Printf("\n========== TOPOLOGY BUILD ===========\n")
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fmt.Printf("Total devices: %d\n", len(b.devices))
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fmt.Printf("Total nodes created: %d\n", len(graph.Nodes))
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for _, node := range graph.Nodes {
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fmt.Printf(" Node: %s (%s) - Type: %s\n", node.ID, node.Hostname, node.Type)
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}
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// 构建边(基于邻居信息)
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edgeMap := make(map[string]bool) // 用于去重
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// 打印所有设备的MAC地址，用于调试
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fmt.Println("\n========== MAC Address Database ==========")
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for _, d := range b.devices {
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if len(d.MACAddresses) > 0 {
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fmt.Printf("Device %s (%s): %d MAC addresses\n", d.Hostname, d.IP, len(d.MACAddresses))
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for i, mac := range d.MACAddresses {
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if i < 5 { // 只打印前5个
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fmt.Printf(" MAC[%d]: %s\n", i, mac)
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}
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}
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if len(d.MACAddresses) > 5 {
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fmt.Printf(" ... and %d more\n", len(d.MACAddresses)-5)
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}
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}
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}
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fmt.Println("==========================================\n")
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for _, device := range b.devices {
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fmt.Printf("Building edges for device %s: %d neighbors, %d MAC addresses\n",
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device.IP, len(device.Neighbors), len(device.MACAddresses))
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for _, neighbor := range device.Neighbors {
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// 过滤虚拟机邻居：识别MAC地址前缀，只保留真实网络设备
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if neighbor.RemoteMAC != "" {
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macPrefix := getMACPrefix(neighbor.RemoteMAC)
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if isVirtualMAC(macPrefix) {
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fmt.Printf(" ⊘ Skipping virtual machine neighbor on %s (MAC: %s, prefix: %s)\n",
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neighbor.LocalInterface, neighbor.RemoteMAC, macPrefix)
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continue
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}
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}
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fmt.Printf(" Processing neighbor on %s: RemoteMAC=%s, RemoteDevice=%s, RemoteIP=%s\n",
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neighbor.LocalInterface, neighbor.RemoteMAC, neighbor.RemoteDevice, neighbor.RemoteIP)
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// 尝试匹配邻居设备 - 多重策略
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targetIP := neighbor.RemoteIP
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matchMethod := "IP"
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// 策略1: 如果已有IP，直接使用
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if targetIP != "" {
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fmt.Printf(" ✓ Using direct IP: %s\n", targetIP)
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} else if neighbor.RemoteDevice != "" {
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// 策略2: 尝试通过主机名匹配
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fmt.Printf(" Trying hostname match: %s\n", neighbor.RemoteDevice)
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for _, d := range b.devices {
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if d.Hostname == neighbor.RemoteDevice {
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targetIP = d.IP
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matchMethod = "hostname"
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fmt.Printf(" ✓ Matched by hostname: %s -> %s\n", d.Hostname, d.IP)
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break
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}
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}
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}
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// 策略3: 通过MAC地址匹配
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if targetIP == "" && neighbor.RemoteMAC != "" {
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fmt.Printf(" Trying MAC match: %s\n", neighbor.RemoteMAC)
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for _, d := range b.devices {
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for _, mac := range d.MACAddresses {
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// 标准化MAC地址进行比较（去除分隔符，转小写）
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normalizedNeighborMAC := normalizeMAC(neighbor.RemoteMAC)
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normalizedDeviceMAC := normalizeMAC(mac)
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if normalizedNeighborMAC == normalizedDeviceMAC {
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targetIP = d.IP
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matchMethod = "MAC"
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fmt.Printf(" ✓ Matched by MAC: %s (device) == %s (neighbor) -> %s\n",
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mac, neighbor.RemoteMAC, d.IP)
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break
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}
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}
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if targetIP != "" {
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break
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}
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}
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}
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// 策略3b: MAC前缀匹配（使用12字符前缀 - 更精确）
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// 同品牌设备虽然4字符前缀相同，但12字符前缀通常不同
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if targetIP == "" && neighbor.RemoteMAC != "" {
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// 使用12字符前缀（例如：642f-c7e0-03）
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macPrefix := ""
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if len(neighbor.RemoteMAC) >= 12 {
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macPrefix = neighbor.RemoteMAC[:12]
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} else {
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macPrefix = neighbor.RemoteMAC
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}
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fmt.Printf(" Trying MAC prefix match (12 chars): %s (prefix: %s)\n", neighbor.RemoteMAC, macPrefix)
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var matchedDevices []string
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for _, d := range b.devices {
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if d.IP == device.IP {
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continue // 跳过自己
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}
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// 检查设备d的MAC地址是否有匹配的前缀
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matchingMACs := 0
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for _, mac := range d.MACAddresses {
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if len(mac) >= 12 && mac[:12] == macPrefix {
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matchingMACs++
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}
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}
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if matchingMACs >= 3 {
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matchedDevices = append(matchedDevices, d.IP)
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}
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}
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// 只有唯一匹配时才建立连接
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if len(matchedDevices) == 1 {
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targetIP = matchedDevices[0]
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matchMethod = fmt.Sprintf("MAC-prefix-12(%s)", macPrefix)
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fmt.Printf(" ✓ Matched by MAC prefix-12 (unique): %s -> %s\n", neighbor.RemoteMAC, targetIP)
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} else if len(matchedDevices) > 1 {
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fmt.Printf(" ✗ Ambiguous MAC prefix-12 match: %s matched %v\n", macPrefix, matchedDevices)
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} else {
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fmt.Printf(" ✗ No device matches MAC prefix-12 %s\n", macPrefix)
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}
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}
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// 策略3c: LLDP接口匹配（改进 - 单向但要求唯一性）
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// 如果设备A的LLDP信息显示它连接到接口Y
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// 而设备B有接口Y，则A连接到B
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// 但如果有多个设备都有接口Y，则不匹配（避免歧义）
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if targetIP == "" && neighbor.RemoteMAC != "" && neighbor.RemoteInterface != "" {
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fmt.Printf(" Trying LLDP interface match: looking for device with interface %s\n", neighbor.RemoteInterface)
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var matchedDevices []string
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for _, d := range b.devices {
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if d.IP == device.IP {
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continue // 跳过自己
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}
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// 检查设备d是否有这个接口
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for _, iface := range d.Interfaces {
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if iface.Name == neighbor.RemoteInterface {
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matchedDevices = append(matchedDevices, d.IP)
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break
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}
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}
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}
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// 只有唯一匹配时才建立连接
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if len(matchedDevices) == 1 {
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targetIP = matchedDevices[0]
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matchMethod = fmt.Sprintf("LLDP-interface(%s->%s)", neighbor.LocalInterface, neighbor.RemoteInterface)
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fmt.Printf(" ✓ Matched by LLDP interface (unique): %s %s -> %s %s\n",
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device.IP, neighbor.LocalInterface, targetIP, neighbor.RemoteInterface)
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} else if len(matchedDevices) > 1 {
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fmt.Printf(" ✗ Ambiguous: multiple devices have interface %s: %v\n",
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neighbor.RemoteInterface, matchedDevices)
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} else {
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fmt.Printf(" ✗ No device found with interface %s\n", neighbor.RemoteInterface)
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}
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}
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// 策略4: 通过本地接口IP网段匹配（新增）
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// 注意：此策略容易产生误匹配，仅在必要时使用
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if targetIP == "" {
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// 查找本地接口的IP地址
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localInterfaceIP := ""
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for _, iface := range device.Interfaces {
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if iface.Name == neighbor.LocalInterface && iface.IP != "" {
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localInterfaceIP = iface.IP
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break
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}
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}
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if localInterfaceIP != "" {
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fmt.Printf(" ⚠ Trying subnet match (risky): local interface %s has IP %s\n",
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neighbor.LocalInterface, localInterfaceIP)
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// 计算本地接口的网段
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localSubnet := getSubnet(localInterfaceIP)
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// 查找其他设备中是否有接口在同一网段
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for _, d := range b.devices {
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if d.IP == device.IP {
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continue // 跳过自己
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}
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// 检查设备的管理IP是否在同一网段
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if getSubnet(d.IP) == localSubnet {
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targetIP = d.IP
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matchMethod = "subnet(management IP)"
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fmt.Printf(" ⚠ Matched by subnet (risky): %s in %s\n", d.IP, localSubnet)
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break
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}
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// 检查设备的所有接口是否在同一网段
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for _, iface := range d.Interfaces {
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if iface.IP != "" && getSubnet(iface.IP) == localSubnet {
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targetIP = d.IP
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matchMethod = fmt.Sprintf("subnet(interface %s)", iface.Name)
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fmt.Printf(" ⚠ Matched by subnet (risky): %s (%s) in %s\n",
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d.IP, iface.Name, localSubnet)
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break
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}
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}
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if targetIP != "" {
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break
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}
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}
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} else {
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// 策略4b: 本地接口没有IP，尝试使用设备管理IP进行子网匹配（高风险策略 - 已禁用）
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// 此策略容易产生错误连接，暂时禁用
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fmt.Printf(" ✗ Skipping subnet match with management IP (disabled - too risky)\n")
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}
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}
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// 策略5: 通过接口描述匹配（新增）
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if targetIP == "" {
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// 查找本地接口的描述，看是否包含其他设备的IP或主机名
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for _, iface := range device.Interfaces {
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if iface.Name == neighbor.LocalInterface && iface.Description != "" {
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desc := strings.ToLower(iface.Description)
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fmt.Printf(" Trying description match: %s\n", iface.Description)
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for _, d := range b.devices {
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if d.IP == device.IP {
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continue
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}
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// 检查描述中是否包含目标设备的IP或主机名
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if strings.Contains(desc, strings.ToLower(d.IP)) ||
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(d.Hostname != "" && strings.Contains(desc, strings.ToLower(d.Hostname))) {
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targetIP = d.IP
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matchMethod = "description"
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fmt.Printf(" ✓ Matched by description: %s\n", iface.Description)
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break
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}
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}
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}
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if targetIP != "" {
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break
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}
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}
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}
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// 策略6: 通过邻居端口号反向匹配（已禁用 - 容易产生错误连接）
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// 暂时禁用，因为端口号匹配不够精确，可能产生环路
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if targetIP == "" {
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fmt.Printf(" ✗ Could not match neighbor on %s (MAC: %s)\n", neighbor.LocalInterface, neighbor.RemoteMAC)
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continue
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}
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fmt.Printf(" ✓ Creating edge: %s (%s) -> %s via %s, matched by %s\n",
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device.IP, neighbor.LocalInterface, targetIP, neighbor.RemoteInterface, matchMethod)
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// 避免重复边：同一对设备之间只保留一条边（不区分接口）
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// 如果这对设备已经有边了，跳过
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hasExistingEdge := false
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for _, existingEdge := range graph.Edges {
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if (existingEdge.Source == device.IP && existingEdge.Target == targetIP) ||
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(existingEdge.Source == targetIP && existingEdge.Target == device.IP) {
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fmt.Printf(" ⚠ Skipping: edge between %s and %s already exists\n", device.IP, targetIP)
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hasExistingEdge = true
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break
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}
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}
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if hasExistingEdge {
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continue
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}
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// 创建唯一的边ID（包含接口信息用于调试）
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edgeID := fmt.Sprintf("%s-%s-%s", device.IP, neighbor.LocalInterface, targetIP)
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edge := models.TopologyEdge{
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ID: edgeID,
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Source: device.IP,
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Target: targetIP,
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SourceInterface: neighbor.LocalInterface,
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TargetInterface: neighbor.RemoteInterface,
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Protocol: neighbor.Protocol,
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}
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graph.Edges = append(graph.Edges, edge)
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edgeMap[edgeID] = true
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}
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}
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fmt.Printf("\nTotal edges created: %d\n", len(graph.Edges))
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for _, edge := range graph.Edges {
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fmt.Printf(" Edge: %s (%s) -> %s (%s) [%s]\n",
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edge.Source, edge.SourceInterface,
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edge.Target, edge.TargetInterface,
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edge.Protocol)
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}
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fmt.Println("========================================\n")
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return graph
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}
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// normalizeMAC 标准化MAC地址（去除分隔符，转小写）
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func normalizeMAC(mac string) string {
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// 去除所有分隔符（-、:、.）
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result := ""
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for _, c := range mac {
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if c != '-' && c != ':' && c != '.' {
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result += string(c)
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}
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}
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// 转小写
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return strings.ToLower(result)
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}
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// getMACPrefix 获取MAC地址前缀（前4个字符）
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func getMACPrefix(mac string) string {
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normalized := normalizeMAC(mac)
|
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if len(normalized) >= 4 {
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return normalized[0:4]
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}
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return normalized
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}
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|
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// isVirtualMAC 判断是否是虚拟机MAC地址前缀
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func isVirtualMAC(prefix string) bool {
|
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// 根据用户反馈，这些前缀都是虚拟机
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userVirtualPrefixes := []string{"9844", "9400", "cc05", "44a1"}
|
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for _, vp := range userVirtualPrefixes {
|
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if prefix == vp {
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return true
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}
|
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}
|
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|
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// 常见虚拟机/虚拟网卡MAC前缀（VMware、Hyper-V、KVM等）
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virtualPrefixes := []string{
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"0005", "000c", "0015", "0050", // VMware
|
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"0017", "001d", "0025", "5254", // KVM/QEMU
|
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"0015", "0017", "00ff", // Xen
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}
|
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|
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for _, vp := range virtualPrefixes {
|
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if prefix == vp {
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return true
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}
|
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}
|
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|
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return false
|
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}
|
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|
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// getSubnet 获取IP地址的C类网段（简化版，适用于/24网络）
|
||
func getSubnet(ip string) string {
|
||
parts := strings.Split(ip, ".")
|
||
if len(parts) == 4 {
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// 返回前3段作为网段，例如: 172.16.8.0/24 -> "172.16.8"
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||
return fmt.Sprintf("%s.%s.%s", parts[0], parts[1], parts[2])
|
||
}
|
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return ip
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}
|
||
|
||
// getDeviceIcon 获取设备图标
|
||
func getDeviceIcon(deviceType models.DeviceType) string {
|
||
switch deviceType {
|
||
case models.DeviceTypeCisco:
|
||
return "router"
|
||
case models.DeviceTypeHuawei:
|
||
return "router"
|
||
case models.DeviceTypeH3C:
|
||
return "switch"
|
||
case models.DeviceTypeASA:
|
||
return "firewall"
|
||
case models.DeviceTypeLinux:
|
||
return "server"
|
||
case models.DeviceTypeWindows:
|
||
return "server"
|
||
default:
|
||
return "device"
|
||
}
|
||
}
|
||
|
||
// GetDevices 获取所有设备
|
||
func (b *Builder) GetDevices() []models.Device {
|
||
return b.devices
|
||
}
|
||
|
||
// Clear 清空拓扑
|
||
func (b *Builder) Clear() {
|
||
b.devices = make([]models.Device, 0)
|
||
}
|