pingtunnel

通过伪造ping，把udp流量通过远程服务器转发到目的服务器上。用于突破某些运营商封锁UDP流量。
By forging ping, the udp traffic is forwarded to the destination server through the remote server. Used to break certain operators to block UDP traffic.

Usage:

pingtunnel -type server

pingtunnel -type client -l LOCAL_IP:4455 -s SERVER_IP -t SERVER_IP:4455

-type     服务器或者客户端
          client or server

-l        本地的地址，发到这个端口的流量将转发到服务器
          Local address, traffic sent to this port will be forwarded to the server

-s        服务器的地址，流量将通过隧道转发到这个服务器
          The address of the server, the traffic will be forwarded to this server through the tunnel

-t        远端服务器转发的目的地址，流量将转发到这个地址
          Destination address forwarded by the remote server, traffic will be forwarded to this address

-timeout  本地记录连接超时的时间，单位是秒
          The time when the local record connection timed out, in seconds

-sproto   客户端发送ping协议的协议，默认是13
          The protocol that the client sends the ping. The default is 13.

-rproto   客户端接收ping协议的协议，默认是14
          The protocol that the client receives the ping. The default is 14.