fix: fix forward route table

.travis.yml

@@ -1,6 +1,6 @@
 language: go
 go:
-    - 1.13
+    - 1.16
 before_install:
 install:
 before_script:

forward/forward.go

@@ -33,6 +33,7 @@ func (f *Forward) Serve() error {
 			break
 		}
 
+		logs.Debug("accept new connection: %v", conn.RemoteAddr())
 		go f.forward(conn)
 	}
 

forward/main.go

@@ -31,7 +31,11 @@ func Main() {
 	// initial next hop dialer
 	dialerCfg := cfg.NexthopConfig
 	routeTable := NewRouteTable()
-	routeTable.Add(dialerCfg.Scheme, dialerCfg.NexthopAddr, dialerCfg.RawConfig)
+	err = routeTable.Add(dialerCfg.Scheme, dialerCfg.NexthopAddr, dialerCfg.RawConfig)
+	if err != nil {
+		logs.Error("add route table fail: %v", err)
+		return
+	}
 
 	f := NewForward(listener, routeTable)
 

forward/route.go

@@ -2,6 +2,7 @@ package forward
 
 import (
 	"fmt"
+	"github.com/ICKelin/gtun/internal/logs"
 	"github.com/ICKelin/gtun/transport"
 	"github.com/ICKelin/gtun/transport/transport_api"
 	"math"
@@ -53,6 +54,7 @@ func (r *RouteTable) Add(scheme, addr, cfg string) error {
 	r.tableMu.Lock()
 	defer r.tableMu.Unlock()
 	r.table[entryKey] = entry
+	logs.Debug("add route table: %s %+v", entryKey, entry)
 	return nil
 }
 
@@ -77,7 +79,10 @@ func (r *RouteTable) Route() (*RouteEntry, error) {
 
 	entry, ok := r.table[r.minRttKey]
 	if !ok {
-		return nil, errNoRoute
+		for _, e := range r.table {
+			entry = e
+			break
+		}
 	}
 
 	return entry, nil