[mio] 简化代码

vnt/src/handle/tun_tap/mod.rs

@@ -101,6 +101,7 @@ pub fn base_handle(
     net_packet.set_source(src_ip);
     net_packet.set_destination(dest_ip);
     if dest_ip == current_device.virtual_gateway {
+        // 发到网关的加密方式不一样，要单独处理
         if protocol == Protocol::Icmp {
             net_packet.set_gateway_flag(true);
             server_cipher.encrypt_ipv4(&mut net_packet)?;
@@ -109,16 +110,9 @@ pub fn base_handle(
         return Ok(());
     }
     if dest_ip.is_multicast() {
-        match protocol {
-            Protocol::Udp => {
-                //当作广播处理
-                net_packet.set_destination(Ipv4Addr::BROADCAST);
-                client_cipher.encrypt_ipv4(&mut net_packet)?;
-                broadcast(server_cipher, context, &mut net_packet, &current_device)?;
-            }
-            _ => {}
-        }
-        return Ok(());
+        //当作广播处理
+        dest_ip = Ipv4Addr::BROADCAST;
+        net_packet.set_destination(Ipv4Addr::BROADCAST);
     }
     if dest_ip.is_broadcast() || current_device.broadcast_ip == dest_ip {
         // 广播 发送到直连目标
@@ -149,6 +143,5 @@ pub fn base_handle(
         proxy_map.send_handle(&mut ipv4_packet)?;
     }
     client_cipher.encrypt_ipv4(&mut net_packet)?;
-    //优先发到直连到地址
     context.send_ipv4_by_id(net_packet.buffer(), &dest_ip, current_device.connect_server)
 }