完善节点筛选机制

README.md

@@ -1,6 +1,6 @@
 ## TODO
 
-- 日志记录
+- edge.area_id 可为空，代表节点无固定地区
 - 后台展示 mac, ip:port，实际地区
 
 上传文件平铺到 uploads，不分子文件夹

docs/api.yaml

@@ -5010,6 +5010,42 @@ paths:
         default:
           $ref: "#/components/responses/PlainTextError"
 
+  /api/admin/proxy/sync/ports:
+    post:
+      tags: [admin/proxy]
+      summary: 重建端口池
+      security:
+        - bearerAuth: []
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/IdRequest"
+      responses:
+        "200":
+          description: 成功，无响应体
+        default:
+          $ref: "#/components/responses/PlainTextError"
+
+  /api/admin/proxy/sync/chains:
+    post:
+      tags: [admin/proxy]
+      summary: 重建代理链
+      security:
+        - bearerAuth: []
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/IdRequest"
+      responses:
+        "200":
+          description: 成功，无响应体
+        default:
+          $ref: "#/components/responses/PlainTextError"
+
   /api/admin/proxy/remove:
     post:
       tags: [admin/proxy]

scripts/sql/init.sql

@@ -669,7 +669,7 @@ create table edge (
     ip         inet not null,
     port       int,
     isp        int  not null,
-    area_id    int  not null,
+    area_id    int,
     status     int  not null default 0,
     rtt        int default 0,
     loss       int default 0,

web/error.go

@@ -52,7 +52,8 @@ func ErrorHandler(c *fiber.Ctx, err error) error {
 
 	case errors.As(err, &servErr):
 		code = fiber.StatusInternalServerError
-		message = err.Error()
+		slog.Warn("服务端错误", slog.String("error", servErr.Error()))
+		message = "服务端错误"
 
 	case errors.As(err, &timeErr):
 		code = fiber.StatusBadRequest

web/globals/gost.go

@@ -19,7 +19,11 @@ func IsGostNotFound(err error) bool {
 }
 
 type GostClient interface {
+	ListChains() ([]*GostChainConfig, error)
 	GetChain(name string) (*GostChainConfig, error)
+	CreateChain(chain *GostChainConfig) error
+	DeleteChain(name string) error
+	SaveConfig() error
 	CreateService(service *GostServiceConfig) error
 	DeleteService(name string) error
 	CreateAuther(auther *GostAutherConfig) error
@@ -54,15 +58,37 @@ func NewGost(host string, port int, pathPrefix, username, password string) GostC
 }
 
 type GostChainConfig struct {
-	Name string `json:"name"`
+	Name string          `json:"name"`
+	Hops []GostHopConfig `json:"hops,omitempty"`
+}
+
+type GostHopConfig struct {
+	Name  string           `json:"name,omitempty"`
+	Nodes []GostNodeConfig `json:"nodes,omitempty"`
+}
+
+type GostNodeConfig struct {
+	Name      string              `json:"name,omitempty"`
+	Addr      string              `json:"addr"`
+	Connector GostConnectorConfig `json:"connector"`
+	Dialer    GostDialerConfig    `json:"dialer"`
+}
+
+type GostConnectorConfig struct {
+	Type string `json:"type"`
+}
+
+type GostDialerConfig struct {
+	Type string `json:"type"`
 }
 
 type GostServiceConfig struct {
-	Name      string             `json:"name"`
-	Addr      string             `json:"addr"`
-	Admission string             `json:"admission,omitempty"`
-	Handler   GostHandlerConfig  `json:"handler"`
-	Listener  GostListenerConfig `json:"listener"`
+	Name      string               `json:"name"`
+	Addr      string               `json:"addr"`
+	Admission string               `json:"admission,omitempty"`
+	Handler   GostHandlerConfig    `json:"handler"`
+	Listener  GostListenerConfig   `json:"listener"`
+	Recorders []GostRecorderConfig `json:"recorders,omitempty"`
 }
 
 type GostHandlerConfig struct {
@@ -75,6 +101,11 @@ type GostListenerConfig struct {
 	Type string `json:"type"`
 }
 
+type GostRecorderConfig struct {
+	Name   string `json:"name"`
+	Record string `json:"record"`
+}
+
 type GostAutherConfig struct {
 	Name  string           `json:"name"`
 	Auths []GostAuthConfig `json:"auths"`
@@ -115,6 +146,40 @@ func (c *gostClient) GetChain(name string) (*GostChainConfig, error) {
 	return &GostChainConfig{Name: name}, nil
 }
 
+func (c *gostClient) ListChains() ([]*GostChainConfig, error) {
+	body, err := c.get("/config/chains")
+	if err != nil {
+		return nil, err
+	}
+	if len(body) == 0 {
+		return nil, nil
+	}
+
+	var resp struct {
+		Data struct {
+			Count int                `json:"count"`
+			List  []*GostChainConfig `json:"list"`
+		} `json:"data"`
+	}
+	if err := json.Unmarshal(body, &resp); err != nil {
+		return nil, fmt.Errorf("parse gost chain list failed %s: %w", string(body), err)
+	}
+
+	return resp.Data.List, nil
+}
+
+func (c *gostClient) CreateChain(chain *GostChainConfig) error {
+	return c.create("/config/chains", chain)
+}
+
+func (c *gostClient) DeleteChain(name string) error {
+	return c.delete("/config/chains/" + url.PathEscape(name))
+}
+
+func (c *gostClient) SaveConfig() error {
+	return c.create("/config", nil)
+}
+
 func (c *gostClient) CreateService(service *GostServiceConfig) error {
 	return c.create("/config/services", service)
 }

web/globals/gost_test.go

@@ -0,0 +1,107 @@
+package globals
+
+import (
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+func TestGostClientChainOperations(t *testing.T) {
+	var (
+		created *GostChainConfig
+		deleted []string
+		saved   bool
+	)
+
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		username, password, ok := r.BasicAuth()
+		if !ok || username != "user" || password != "pass" {
+			t.Errorf("unexpected auth: ok=%v username=%q password=%q", ok, username, password)
+			http.Error(w, "unauthorized", http.StatusUnauthorized)
+			return
+		}
+
+		switch {
+		case r.Method == http.MethodGet && r.URL.Path == "/api/config/chains":
+			_ = json.NewEncoder(w).Encode(map[string]any{
+				"count": 2,
+				"list": []map[string]any{
+					{"name": "old-a"},
+					{"name": "old-b"},
+				},
+			})
+		case r.Method == http.MethodPost && r.URL.Path == "/api/config/chains":
+			if err := json.NewDecoder(r.Body).Decode(&created); err != nil {
+				t.Errorf("Decode chain failed: %v", err)
+				http.Error(w, "bad request", http.StatusBadRequest)
+				return
+			}
+			_, _ = w.Write([]byte(`{}`))
+		case r.Method == http.MethodDelete && r.URL.Path == "/api/config/chains/old-a":
+			deleted = append(deleted, "old-a")
+			_, _ = w.Write([]byte(`{}`))
+		case r.Method == http.MethodDelete && r.URL.Path == "/api/config/chains/old-b":
+			deleted = append(deleted, "old-b")
+			_, _ = w.Write([]byte(`{}`))
+		case r.Method == http.MethodPost && r.URL.Path == "/api/config":
+			saved = true
+			_, _ = w.Write([]byte(`{}`))
+		default:
+			t.Errorf("unexpected request: %s %s", r.Method, r.URL.Path)
+			http.NotFound(w, r)
+		}
+	}))
+	defer server.Close()
+
+	client := NewGost(server.URL, 9700, "/api", "user", "pass")
+
+	chains, err := client.ListChains()
+	if err != nil {
+		t.Fatalf("ListChains returned error: %v", err)
+	}
+	if len(chains) != 2 || chains[0].Name != "old-a" || chains[1].Name != "old-b" {
+		t.Fatalf("unexpected chains: %#v", chains)
+	}
+
+	if err := client.DeleteChain(chains[0].Name); err != nil {
+		t.Fatalf("DeleteChain old-a returned error: %v", err)
+	}
+	if err := client.DeleteChain(chains[1].Name); err != nil {
+		t.Fatalf("DeleteChain old-b returned error: %v", err)
+	}
+	if len(deleted) != 2 {
+		t.Fatalf("unexpected deleted chains: %#v", deleted)
+	}
+
+	err = client.CreateChain(&GostChainConfig{
+		Name: "edge-a",
+		Hops: []GostHopConfig{{
+			Nodes: []GostNodeConfig{{
+				Addr:      "192.0.2.1:1080",
+				Connector: GostConnectorConfig{Type: "socks5"},
+				Dialer:    GostDialerConfig{Type: "tcp"},
+			}},
+		}},
+	})
+	if err != nil {
+		t.Fatalf("CreateChain returned error: %v", err)
+	}
+	if created == nil || created.Name != "edge-a" {
+		t.Fatalf("unexpected created chain: %#v", created)
+	}
+	if len(created.Hops) != 1 || len(created.Hops[0].Nodes) != 1 {
+		t.Fatalf("unexpected created chain hops: %#v", created.Hops)
+	}
+	node := created.Hops[0].Nodes[0]
+	if node.Addr != "192.0.2.1:1080" || node.Connector.Type != "socks5" || node.Dialer.Type != "tcp" {
+		t.Fatalf("unexpected created node: %#v", node)
+	}
+
+	if err := client.SaveConfig(); err != nil {
+		t.Fatalf("SaveConfig returned error: %v", err)
+	}
+	if !saved {
+		t.Fatal("expected SaveConfig request")
+	}
+}

web/handlers/channel.go

@@ -230,23 +230,6 @@ type CreateChannelReqV3 struct {
 	Isp        *int              `json:"isp"`
 }
 
-func buildCreateChannelResp(result []*m.Channel, protocol int, authType s.ChannelAuthType) []*CreateChannelRespItem {
-	resp := make([]*CreateChannelRespItem, len(result))
-	for i, channel := range result {
-		resp[i] = &CreateChannelRespItem{
-			Proto: protocol,
-			Host:  channel.Host,
-			IP:    channel.Proxy.IP.String(),
-			Port:  channel.Port,
-		}
-		if authType == s.ChannelAuthTypePass {
-			resp[i].Username = channel.Username
-			resp[i].Password = channel.Password
-		}
-	}
-	return resp
-}
-
 type CreateChannelRespItem struct {
 	Proto    int     `json:"-"`
 	Host     string  `json:"host"`
@@ -474,3 +457,20 @@ type SyncChannelClearExpiredByAdminReq struct {
 type SyncChannelClearExpiredByAdminResp struct {
 	Count int `json:"count"`
 }
+
+func buildCreateChannelResp(result []*m.Channel, protocol int, authType s.ChannelAuthType) []*CreateChannelRespItem {
+	resp := make([]*CreateChannelRespItem, len(result))
+	for i, channel := range result {
+		resp[i] = &CreateChannelRespItem{
+			Proto: protocol,
+			Host:  channel.Host,
+			IP:    channel.Proxy.IP.String(),
+			Port:  channel.Port,
+		}
+		if authType == s.ChannelAuthTypePass {
+			resp[i].Username = channel.Username
+			resp[i].Password = channel.Password
+		}
+	}
+	return resp
+}

web/handlers/proxy.go

@@ -105,7 +105,7 @@ func UpdateProxyStatus(c *fiber.Ctx) error {
 	return c.JSON(nil)
 }
 
-func SyncProxyPool(c *fiber.Ctx) error {
+func SyncProxyPorts(c *fiber.Ctx) error {
 	_, err := auth.GetAuthCtx(c).PermitAdmin(core.ScopeProxyWrite)
 	if err != nil {
 		return err
@@ -116,7 +116,25 @@ func SyncProxyPool(c *fiber.Ctx) error {
 		return err
 	}
 
-	if err := s.Proxy.SyncPool(req.Id); err != nil {
+	if err := s.Proxy.SyncPorts(req.Id); err != nil {
+		return err
+	}
+
+	return c.JSON(nil)
+}
+
+func SyncProxyChains(c *fiber.Ctx) error {
+	_, err := auth.GetAuthCtx(c).PermitAdmin(core.ScopeProxyWrite)
+	if err != nil {
+		return err
+	}
+
+	var req core.IdReq
+	if err := g.Validator.ParseBody(c, &req); err != nil {
+		return err
+	}
+
+	if err := s.Proxy.SyncChains(req.Id); err != nil {
 		return err
 	}
 

web/models/edge.go

@@ -14,7 +14,7 @@ type Edge struct {
 	IP      orm.Inet   `json:"ip" gorm:"column:ip;not null"`            // 节点地址或 GOST chain addr 的 IP
 	Port    *uint16    `json:"port,omitempty" gorm:"column:port"`       // GOST chain addr 的端口
 	ISP     EdgeISP    `json:"isp" gorm:"column:isp"`                   // 运营商：0-未知，1-电信，2-联通，3-移动
-	AreaID  int32      `json:"area_id" gorm:"column:area_id"`           // 城市地区ID
+	AreaID  *int32     `json:"area_id,omitempty" gorm:"column:area_id"` // 城市地区ID
 	Status  EdgeStatus `json:"status" gorm:"column:status"`             // 节点状态：0-离线，1-正常
 	RTT     int32      `json:"rtt" gorm:"column:rtt"`                   // 最近平均延迟
 	Loss    int32      `json:"loss" gorm:"column:loss"`                 // 最近丢包率
@@ -41,6 +41,7 @@ const (
 type EdgeISP int
 
 const (
+	EdgeISPUnknown EdgeISP = 0 // 未知/任意
 	EdgeISPTelecom EdgeISP = 1 // 电信
 	EdgeISPUnicom  EdgeISP = 2 // 联通
 	EdgeISPMobile  EdgeISP = 3 // 移动

web/routes.go

@@ -1,13 +1,11 @@
 package web
 
 import (
-	"fmt"
 	"platform/pkg/env"
 	auth2 "platform/web/auth"
 	"platform/web/core"
 	"platform/web/globals"
 	"platform/web/handlers"
-	"strings"
 	"time"
 
 	q "platform/web/queries"
@@ -51,46 +49,6 @@ func ApplyRouters(app *fiber.App) {
 			}
 			return ctx.JSON(resp)
 		})
-		debug.Get("/gen-edge", func(ctx *fiber.Ctx) error {
-			areas, err := q.Area.Where(q.Area.Level.Eq(2)).Find()
-			if err != nil {
-				return err
-			}
-
-			sb := strings.Builder{}
-			sb.WriteString("INSERT INTO edge (type, version, mac, ip, port, isp, area_id, status) VALUES\n")
-
-			for i, area := range areas {
-				// jh edges
-				for j := range 20 {
-					fmt.Fprintf(&sb, "(2, 1, 'jh-%d-%d-%d', '192.168.50.%d', %d, 0, %d, 1)", area.ID, j+1, i+44001, j+2, i+44001, area.ID)
-					sb.WriteString(",\n")
-				}
-
-				// jg edges
-				for j := range 10 {
-					var ip string
-					var n int
-					if i < 100 {
-						ip = "192.168.0.232"
-						n = 1
-					} else if i < 200 {
-						ip = "192.168.59.236"
-						n = 2
-					} else {
-						ip = "192.168.59.237"
-						n = 3
-					}
-					fmt.Fprintf(&sb, "(2, 1, 'jg-%d-%d-%d', '%s', %d, 0, %d, 1)", area.ID, n, i*10+j+20001, ip, i*10+j+20001, area.ID)
-					if i < len(areas)-1 || j < 9 {
-						sb.WriteString(",\n")
-					}
-				}
-			}
-
-			sb.WriteString(";\n")
-			return ctx.SendString(sb.String())
-		})
 	}
 }
 
@@ -129,9 +87,6 @@ func clientRouter(api fiber.Router) {
 	client.Post("/verify/sms", handlers.SendSmsCode)
 
 	// 网关
-	proxy := client.Group("/proxy")
-	proxy.Post("/sync-pool", handlers.SyncProxyPool)
-
 	// 通道管理
 	channel := client.Group("/channel")
 	channel.Post("/remove", handlers.RemoveChannels)
@@ -277,6 +232,8 @@ func adminRouter(api fiber.Router) {
 	proxy.Post("/create", handlers.CreateProxy)
 	proxy.Post("/update", handlers.UpdateProxy)
 	proxy.Post("/update/status", handlers.UpdateProxyStatus)
+	proxy.Post("/sync/ports", handlers.SyncProxyPorts)
+	proxy.Post("/sync/chains", handlers.SyncProxyChains)
 	proxy.Post("/remove", handlers.RemoveProxy)
 
 	// trade 交易

web/services/channel.go

@@ -40,6 +40,10 @@ type channelServer struct {
 }
 
 func (s *channelServer) CreateChannels(source netip.Addr, resourceNo string, authWhitelist bool, authPassword bool, count int, edgeFilter *EdgeFilter) ([]*m.Channel, error) {
+	if edgeFilter == nil {
+		edgeFilter = &EdgeFilter{}
+	}
+
 	var area *m.Area
 	if edgeFilter.AreaID != nil {
 		var err error
@@ -265,8 +269,8 @@ func persistChannelCreate(ctx *channelCreateContext, channels []*m.Channel) erro
 			BatchNo:    ctx.BatchNo,
 			Count:      int32(ctx.Count),
 			ISP:        u.X(ctx.Filter.Isp.String()),
-			Prov:       prov,
-			City:       city,
+			Prov:       u.Ternary(ctx.Filter.AreaID != nil, prov, nil),
+			City:       u.Ternary(ctx.Filter.AreaID != nil, city, nil),
 			IP:         orm.Inet{Addr: ctx.Source},
 			Time:       ctx.Now,
 		}); err != nil {
@@ -397,7 +401,7 @@ func selectProxyByType(proxyType m.ProxyType, count int) (*m.Proxy, error) {
 		}
 	}
 	if maxCount < count {
-		return nil, core.NewBizErr("无可用代理")
+		return nil, core.NewBizErr("无空闲代理")
 	}
 
 	return bestProxy, nil

web/services/channel_gost.go

@@ -10,7 +10,7 @@ import (
 	q "platform/web/queries"
 	"strings"
 
-	"gorm.io/gen"
+	"gorm.io/gen/field"
 )
 
 type channelGostProvider struct{}
@@ -37,7 +37,7 @@ func (s *channelGostProvider) prepareCreate(ctx *channelCreateContext) (*channel
 		serviceName := gostServiceName(ctx.BatchNo, port)
 		channel := newBaseChannel(ctx, port)
 		channel.EdgeID = u.P(edge.ID)
-		channel.EdgeRef = u.P(serviceName)
+		channel.EdgeRef = u.P(edge.Mac)
 		channel.IP = u.P(edge.IP)
 
 		service := &g.GostServiceConfig{
@@ -50,6 +50,9 @@ func (s *channelGostProvider) prepareCreate(ctx *channelCreateContext) (*channel
 			Listener: g.GostListenerConfig{
 				Type: "tcp",
 			},
+			Recorders: []g.GostRecorderConfig{
+				{Name: "record-file", Record: "recorder.service.handler"},
+			},
 		}
 
 		if ctx.AuthWhitelist {
@@ -138,40 +141,34 @@ func (s *channelGostProvider) selectEdge(filter *EdgeFilter, area *m.Area, count
 		filter = &EdgeFilter{}
 	}
 
-	conds := []gen.Condition{
+	do := q.Edge.Where(
 		q.Edge.Type.Eq(int(m.EdgeTypeGostChain)),
 		q.Edge.Status.Eq(int(m.EdgeStatusNormal)),
+	)
+	if filter.Isp != nil {
+		do = do.Where(q.Edge.ISP.In(int(m.EdgeISPUnknown), int(*filter.Isp)))
 	}
-	if isp := u.X(filter.Isp.String()); isp != nil {
-		conds = append(conds, q.Edge.ISP.Eq(int(*filter.Isp)))
-	}
-
-	query := q.Edge.Where(conds...)
 	if area != nil {
 		switch area.Level {
 		case m.AreaLevelProvince:
 			edgeArea := q.Area.As("EdgeArea")
-			query = query.
-				Join(edgeArea, edgeArea.ID.EqCol(q.Edge.AreaID)).
-				Where(edgeArea.ParentID.Eq(area.ID))
+			do = do.
+				Where(edgeArea.ParentID.Eq(area.ID)).
+				Join(edgeArea, edgeArea.ID.EqCol(q.Edge.AreaID))
 		case m.AreaLevelCity:
-			query = query.Where(q.Edge.AreaID.Eq(area.ID))
+			do = do.Where(q.Edge.AreaID.Eq(area.ID))
 		default:
 			return nil, core.NewBizErr("地区层级不支持")
 		}
 	}
 
-	edges, err := query.
-		Order(q.Edge.ID).
+	edges, err := do.
+		Order(field.NewUnsafeFieldRaw("random()")).
 		Limit(count).
 		Find()
 	if err != nil {
 		return nil, core.NewBizErr("查询可用节点失败", err)
 	}
-	return expandGostEdges(edges, count)
-}
-
-func expandGostEdges(edges []*m.Edge, count int) ([]*m.Edge, error) {
 	if len(edges) == 0 {
 		return nil, core.NewBizErr("地区可用节点数量不足")
 	}
@@ -180,6 +177,7 @@ func expandGostEdges(edges []*m.Edge, count int) ([]*m.Edge, error) {
 	for i := range count {
 		result[i] = edges[i%len(edges)]
 	}
+
 	return result, nil
 }
 

web/services/proxy.go

@@ -2,6 +2,7 @@ package services
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"net/netip"
 	"platform/pkg/u"
@@ -14,6 +15,7 @@ import (
 	"time"
 
 	"gorm.io/gen/field"
+	"gorm.io/gorm"
 )
 
 var Proxy = &proxyService{}
@@ -23,11 +25,20 @@ type proxyService struct{}
 func hasUsedChans(proxyID int32) (bool, error) {
 	ctx := context.Background()
 	pattern := usedChansKey(proxyID, "*")
-	keys, _, err := g.Redis.Scan(ctx, 0, pattern, 1).Result()
-	if err != nil {
-		return false, err
+	var cursor uint64
+	for {
+		keys, next, err := g.Redis.Scan(ctx, cursor, pattern, 100).Result()
+		if err != nil {
+			return false, err
+		}
+		if len(keys) > 0 {
+			return true, nil
+		}
+		if next == 0 {
+			return false, nil
+		}
+		cursor = next
 	}
-	return len(keys) > 0, nil
 }
 
 func rebuildFreeChans(proxyID int32, addr netip.Addr) error {
@@ -161,17 +172,117 @@ func (s *proxyService) Update(update *UpdateProxy) error {
 	return nil
 }
 
-func (s *proxyService) SyncPool(id int32) error {
-	proxy, err := q.Proxy.Where(q.Proxy.ID.Eq(id)).Select(q.Proxy.ID, q.Proxy.IP).First()
+func (s *proxyService) SyncPorts(id int32) error {
+	proxy, err := findOfflineProxy(id)
 	if err != nil {
-		return core.NewServErr("获取代理数据失败", err)
+		return err
 	}
-	if proxy == nil {
-		return core.NewBizErr("代理不存在")
+
+	used, err := hasUsedChans(id)
+	if err != nil {
+		return core.NewServErr("检查代理通道状态失败", err)
 	}
+	if used {
+		return core.NewBizErr("代理存在未关闭通道，禁止重建端口池")
+	}
+
 	return rebuildFreeChans(id, proxy.IP.Addr)
 }
 
+func (s *proxyService) SyncChains(id int32) error {
+	proxy, err := findOfflineProxy(id)
+	if err != nil {
+		return err
+	}
+	if proxy.Type != m.ProxyTypeGost {
+		return core.NewBizErr("仅 GOST 代理支持重建代理链")
+	}
+
+	chains, err := buildGostChainsFromEdges()
+	if err != nil {
+		return err
+	}
+
+	client, err := proxyGost(proxy)
+	if err != nil {
+		return core.NewServErr("创建 GOST 客户端失败", err)
+	}
+
+	oldChains, err := client.ListChains()
+	if err != nil {
+		return core.NewServErr("查询 GOST chains 失败", err)
+	}
+	for _, chain := range oldChains {
+		if err := client.DeleteChain(chain.Name); err != nil {
+			return core.NewServErr(fmt.Sprintf("删除 GOST chain 失败: %s", chain.Name), err)
+		}
+	}
+
+	for _, chain := range chains {
+		if err := client.CreateChain(chain); err != nil {
+			return core.NewServErr(fmt.Sprintf("创建 GOST chain 失败: %s", chain.Name), err)
+		}
+	}
+
+	if err := client.SaveConfig(); err != nil {
+		return core.NewServErr("保存 GOST 配置失败", err)
+	}
+	return nil
+}
+
+func findOfflineProxy(id int32) (*m.Proxy, error) {
+	proxy, err := q.Proxy.Where(q.Proxy.ID.Eq(id)).Take()
+	if errors.Is(err, gorm.ErrRecordNotFound) {
+		return nil, core.NewBizErr("代理不存在")
+	}
+	if err != nil {
+		return nil, core.NewServErr("获取代理数据失败", err)
+	}
+	if proxy.Status != m.ProxyStatusOffline {
+		return nil, core.NewBizErr("代理未下线，禁止同步")
+	}
+	return proxy, nil
+}
+
+func buildGostChainsFromEdges() ([]*g.GostChainConfig, error) {
+	edges, err := q.Edge.
+		Where(q.Edge.Type.Eq(int(m.EdgeTypeGostChain))).
+		Order(q.Edge.ID).
+		Find()
+	if err != nil {
+		return nil, core.NewServErr("查询 GOST edge 数据失败", err)
+	}
+
+	chains := make([]*g.GostChainConfig, len(edges))
+	for i, edge := range edges {
+		if strings.TrimSpace(edge.Mac) == "" {
+			return nil, core.NewBizErr(fmt.Sprintf("GOST edge %d chain 名称为空", edge.ID))
+		}
+		if !edge.IP.Addr.IsValid() {
+			return nil, core.NewBizErr(fmt.Sprintf("GOST edge %s IP 无效", edge.Mac))
+		}
+		if edge.Port == nil || *edge.Port == 0 {
+			return nil, core.NewBizErr(fmt.Sprintf("GOST edge %s 端口为空", edge.Mac))
+		}
+
+		chains[i] = &g.GostChainConfig{
+			Name: edge.Mac,
+			Hops: []g.GostHopConfig{{
+				Nodes: []g.GostNodeConfig{{
+					Addr: netip.AddrPortFrom(edge.IP.Addr, *edge.Port).String(),
+					Connector: g.GostConnectorConfig{
+						Type: "socks5",
+					},
+					Dialer: g.GostDialerConfig{
+						Type: "tcp",
+					},
+				}},
+			}},
+		}
+	}
+	return chains, nil
+}
+
 func (s *proxyService) Remove(id int32) error {
 	used, err := hasUsedChans(id)
 	if err != nil {