nil ㅂㅓ그 수정

octopus-outside/main.go

@@ -180,7 +180,12 @@ func getSubnetIPInfo(ip net.IP, verbose bool) (gw net.IP, cidr uint64, linkname
 			if verbose {
 				fmt.Printf("     routing table %s\n", route.String())
 			}
-			if route.Dst.Contains(ip) {
+
+			if route.Dst == nil {
+				if verbose {
+					fmt.Printf("      - default gateway : no one!\n")
+				}
+			} else if route.Dst.Contains(ip) {
 				if verbose {
 					fmt.Printf("      - matched routing role : %s\n", route.String())
 				}
@@ -191,13 +196,21 @@ func getSubnetIPInfo(ip net.IP, verbose bool) (gw net.IP, cidr uint64, linkname
 			}
 		}
 
+		if matchedRoute == nil {
+			if verbose {
+				fmt.Println("    - cannot getting routing rule")
+				fmt.Println("  abandon this interface ")
+			}
+			continue
+		}
 		if cidrData, err := getCidr(*matchedRoute.Dst); err == nil {
 			cidr = cidrData
 			if verbose {
 				fmt.Printf("     interface have a subnet routing rule. gateway: %s", matchedRoute)
 				fmt.Println(" ok! matched ")
 			}
-			gw, cidr, linkname = matchedRoute.Gw, cidrData, attrs.Name
+			gw, cidr, linkname = matchedRoute.Src, cidrData, attrs.Name
+			break
 		} else if verbose {
 			fmt.Printf("    - cannot getting netmask : %s", err)
 			fmt.Println("  abandon this interface ")