添加管理员端路由管理功能，查看当前系统剩余的NAT4或者V6地址剩余情况

backend/internal/api/routing.go

@@ -0,0 +1,151 @@
+package api
+
+import (
+	"net/http"
+	"sort"
+	"strconv"
+
+	"clicd/internal/config"
+	"clicd/internal/lxc"
+)
+
+type routeCapacity struct {
+	Used      int    `json:"used"`
+	Remaining string `json:"remaining"`
+	Total     string `json:"total"`
+}
+
+type nat4Route struct {
+	ContainerID   int    `json:"container_id"`
+	ContainerName string `json:"container_name"`
+	LXCName       string `json:"lxc_name"`
+	Status        string `json:"status"`
+	IP            string `json:"ip"`
+	HostPort      int    `json:"host_port"`
+	ContainerPort int    `json:"container_port"`
+	Protocol      string `json:"protocol"`
+	Description   string `json:"description"`
+}
+
+type ipv6Route struct {
+	ContainerID   int    `json:"container_id"`
+	ContainerName string `json:"container_name"`
+	LXCName       string `json:"lxc_name"`
+	Status        string `json:"status"`
+	Address       string `json:"address"`
+	PrefixLen     int    `json:"prefix_len"`
+	Interface     string `json:"interface"`
+}
+
+type routingResponse struct {
+	NAT4            routeCapacity        `json:"nat4"`
+	IPv6            routeCapacity        `json:"ipv6"`
+	NAT4Mappings    []nat4Route          `json:"nat4_mappings"`
+	IPv6Assignments []ipv6Route          `json:"ipv6_assignments"`
+	IPv6Prefixes    []lxc.IPv6PrefixInfo `json:"ipv6_prefixes"`
+}
+
+func HandleRouting(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodGet {
+		jsonResponse(w, http.StatusMethodNotAllowed, APIResponse{Success: false, Message: "Method not allowed"})
+		return
+	}
+
+	nat4Mappings := make([]nat4Route, 0)
+	usedPorts := map[int]bool{}
+	ipv6Assignments := make([]ipv6Route, 0)
+
+	const nat4StartPort = 20000
+	const nat4EndPort = 65535
+
+	for _, c := range config.AppConfig.Containers {
+		for _, pm := range c.PortMappings {
+			if pm.HostPort >= nat4StartPort && pm.HostPort <= nat4EndPort {
+				usedPorts[pm.HostPort] = true
+			}
+			nat4Mappings = append(nat4Mappings, nat4Route{
+				ContainerID:   c.ID,
+				ContainerName: c.Name,
+				LXCName:       c.LxcName(),
+				Status:        c.Status,
+				IP:            c.IP,
+				HostPort:      pm.HostPort,
+				ContainerPort: pm.ContainerPort,
+				Protocol:      pm.Protocol,
+				Description:   pm.Description,
+			})
+		}
+		if c.IPv6 != "" {
+			ipv6Assignments = append(ipv6Assignments, ipv6Route{
+				ContainerID:   c.ID,
+				ContainerName: c.Name,
+				LXCName:       c.LxcName(),
+				Status:        c.Status,
+				Address:       c.IPv6,
+				PrefixLen:     c.IPv6PrefixLen,
+				Interface:     c.IPv6Interface,
+			})
+		}
+	}
+	sort.SliceStable(nat4Mappings, func(i, j int) bool {
+		if nat4Mappings[i].HostPort == nat4Mappings[j].HostPort {
+			return nat4Mappings[i].ContainerName < nat4Mappings[j].ContainerName
+		}
+		return nat4Mappings[i].HostPort < nat4Mappings[j].HostPort
+	})
+	sort.SliceStable(ipv6Assignments, func(i, j int) bool {
+		return ipv6Assignments[i].Address < ipv6Assignments[j].Address
+	})
+
+	const totalNAT4Ports = nat4EndPort - nat4StartPort + 1
+	nat4Used := len(usedPorts)
+	nat4Remaining := totalNAT4Ports - nat4Used
+	if nat4Remaining < 0 {
+		nat4Remaining = 0
+	}
+
+	prefixes := lxc.DetectPublicIPv6Prefixes()
+	ipv6Total := "0"
+	ipv6Remaining := "0"
+	if len(prefixes) > 0 {
+		ipv6Total = lxc.IPv6PrefixCapacity(prefixes[0].PrefixLen)
+		ipv6Remaining = subtractCapacity(ipv6Total, len(ipv6Assignments))
+	}
+
+	jsonResponse(w, http.StatusOK, APIResponse{
+		Success: true,
+		Data: routingResponse{
+			NAT4: routeCapacity{
+				Used:      nat4Used,
+				Remaining: strconv.Itoa(nat4Remaining),
+				Total:     strconv.Itoa(totalNAT4Ports),
+			},
+			IPv6: routeCapacity{
+				Used:      len(ipv6Assignments),
+				Remaining: ipv6Remaining,
+				Total:     ipv6Total,
+			},
+			NAT4Mappings:    nat4Mappings,
+			IPv6Assignments: ipv6Assignments,
+			IPv6Prefixes:    prefixes,
+		},
+	})
+}
+
+func subtractCapacity(total string, used int) string {
+	if total == "" || total == "0" {
+		return "0"
+	}
+	if total == "large" {
+		return "large"
+	}
+	parsed, err := strconv.ParseInt(total, 10, 64)
+	if err != nil {
+		return total
+	}
+	remaining := parsed - int64(used)
+	if remaining < 0 {
+		remaining = 0
+	}
+	return strconv.FormatInt(remaining, 10)
+}

backend/internal/lxc/ipv6.go

@@ -728,6 +728,27 @@ func ensureIPv6ForwardRules(ipv6 string) {
 	}
 }
 
+func removeHostIPv6Routing(ipv6, uplink string) {
+	removeIPv6NAT66(ipv6, uplink)
+	removeIPv6ForwardRules(ipv6)
+	runQuiet("ip", "-6", "route", "del", ipv6+"/128", "dev", "lxcbr0")
+	if uplink != "" {
+		runQuiet("ip", "-6", "neigh", "del", "proxy", ipv6, "dev", uplink)
+	}
+}
+
+func removeIPv6ForwardRules(ipv6 string) {
+	rules := [][]string{
+		{"FORWARD", "-i", "lxcbr0", "-s", ipv6 + "/128", "-j", "ACCEPT"},
+		{"FORWARD", "-o", "lxcbr0", "-d", ipv6 + "/128", "-j", "ACCEPT"},
+	}
+	for _, rule := range rules {
+		del := append([]string{"-D"}, rule...)
+		for exec.Command("ip6tables", del...).Run() == nil {
+		}
+	}
+}
+
 func containerIPv6ConnectivityOK(lxcName string) bool {
 	targets := []string{"2606:4700:4700::1111", "2001:4860:4860::8888"}
 	for _, target := range targets {

backend/internal/lxc/lxc.go

@@ -1425,7 +1425,7 @@ func (m *Manager) DestroyContainer(id int) error {
 	}
 	lxcName := c.LxcName()
 	if c.IPv6 != "" && c.IPv6Interface != "" {
-		removeIPv6NAT66(c.IPv6, c.IPv6Interface)
+		removeHostIPv6Routing(c.IPv6, c.IPv6Interface)
 	}
 
 	if err := m.StopContainer(id); err != nil {

backend/internal/server/server.go

@@ -88,6 +88,7 @@ func setupRoutes(mux *http.ServeMux) {
 	mux.HandleFunc("/api/dashboard", corsMiddleware(api.AdminMiddleware(api.HandleDashboard)))
 	mux.HandleFunc("/api/host-info", corsMiddleware(api.AdminMiddleware(api.HandleHostInfo)))
 	mux.HandleFunc("/api/snapshots", corsMiddleware(api.AdminMiddleware(api.HandleSnapshots)))
+	mux.HandleFunc("/api/routing", corsMiddleware(api.AdminMiddleware(api.HandleRouting)))
 	mux.HandleFunc("/api/ipv6/status", corsMiddleware(api.AdminMiddleware(api.HandleIPv6Status)))
 	mux.HandleFunc("/api/oversell", corsMiddleware(api.AdminMiddleware(api.HandleOversell)))
 	mux.HandleFunc("/api/oversell/status", corsMiddleware(api.AdminMiddleware(api.HandleOversellStatus)))