[mio] 调整打洞策略

vnt/src/channel/context.rs

@@ -453,7 +453,8 @@ impl RouteTable {
     }
     pub fn need_punch(&self, id: &Ipv4Addr) -> bool {
         if let Some((_, v)) = self.route_table.read().get(id) {
-            if v.iter().filter(|(k, _)| k.is_p2p()).count() >= self.channel_num {
+            //存在p2p的通道则不再打洞
+            if v.iter().filter(|(k, _)| k.is_p2p()).count() >= 1 {
                 return false;
             }
         }

vnt/src/channel/punch.rs

@@ -350,11 +350,6 @@ impl Punch {
         max: usize,
     ) -> io::Result<()> {
         let mut count = 0;
-        let index = if self.context.channel_num() == 1 {
-            0
-        } else {
-            rand::thread_rng().gen_range(0..self.context.channel_num())
-        };
         for port in ports {
             for pub_ip in ips {
                 count += 1;
@@ -362,7 +357,7 @@ impl Punch {
                     return Ok(());
                 }
                 let addr = SocketAddr::V4(SocketAddrV4::new(*pub_ip, *port));
-                self.context.send_main_udp(index, buf, addr)?;
+                self.context.send_main_udp(0, buf, addr)?;
                 thread::sleep(Duration::from_millis(2));
             }
         }