refactor linux socket opts

transport/internet/sockopt_linux.go

@@ -59,17 +59,17 @@ func applyOutboundSocketOptions(network string, address string, fd uintptr, conf
 			}
 		}
 
-		if config.TcpKeepAliveInterval > 0 || config.TcpKeepAliveIdle > 0 {
-			if config.TcpKeepAliveInterval > 0 {
-				if err := syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, syscall.TCP_KEEPINTVL, int(config.TcpKeepAliveInterval)); err != nil {
-					return newError("failed to set TCP_KEEPINTVL", err)
-				}
+		if config.TcpKeepAliveInterval > 0 {
+			if err := syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, syscall.TCP_KEEPINTVL, int(config.TcpKeepAliveInterval)); err != nil {
+				return newError("failed to set TCP_KEEPINTVL", err)
 			}
-			if config.TcpKeepAliveIdle > 0 {
-				if err := syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, syscall.TCP_KEEPIDLE, int(config.TcpKeepAliveIdle)); err != nil {
-					return newError("failed to set TCP_KEEPIDLE", err)
-				}
+		}
+		if config.TcpKeepAliveIdle > 0 {
+			if err := syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, syscall.TCP_KEEPIDLE, int(config.TcpKeepAliveIdle)); err != nil {
+				return newError("failed to set TCP_KEEPIDLE", err)
 			}
+		}
+		if config.TcpKeepAliveInterval > 0 || config.TcpKeepAliveIdle > 0 {
 			if err := syscall.SetsockoptInt(int(fd), syscall.SOL_SOCKET, syscall.SO_KEEPALIVE, 1); err != nil {
 				return newError("failed to set SO_KEEPALIVE").Base(err)
 			}
@@ -103,17 +103,17 @@ func applyInboundSocketOptions(network string, fd uintptr, config *SocketConfig)
 			}
 		}
 
-		if config.TcpKeepAliveInterval > 0 || config.TcpKeepAliveIdle > 0 {
-			if config.TcpKeepAliveInterval > 0 {
-				if err := syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, syscall.TCP_KEEPINTVL, int(config.TcpKeepAliveInterval)); err != nil {
-					return newError("failed to set TCP_KEEPINTVL", err)
-				}
+		if config.TcpKeepAliveInterval > 0 {
+			if err := syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, syscall.TCP_KEEPINTVL, int(config.TcpKeepAliveInterval)); err != nil {
+				return newError("failed to set TCP_KEEPINTVL", err)
 			}
-			if config.TcpKeepAliveIdle > 0 {
-				if err := syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, syscall.TCP_KEEPIDLE, int(config.TcpKeepAliveIdle)); err != nil {
-					return newError("failed to set TCP_KEEPIDLE", err)
-				}
+		}
+		if config.TcpKeepAliveIdle > 0 {
+			if err := syscall.SetsockoptInt(int(fd), syscall.IPPROTO_TCP, syscall.TCP_KEEPIDLE, int(config.TcpKeepAliveIdle)); err != nil {
+				return newError("failed to set TCP_KEEPIDLE", err)
 			}
+		}
+		if config.TcpKeepAliveInterval > 0 || config.TcpKeepAliveIdle > 0 {
 			if err := syscall.SetsockoptInt(int(fd), syscall.SOL_SOCKET, syscall.SO_KEEPALIVE, 1); err != nil {
 				return newError("failed to set SO_KEEPALIVE", err)
 			}