XCore Exchange

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void linker_svr_handle(chanend tcp_svr,xtcp_connection_t *conn)
{
  unsigned char data[UDP_MAX_BUF];

  switch (conn->event){
    case XTCP_IFUP           :
    case XTCP_IFDOWN         :
    case XTCP_ALREADY_HANDLED: return;
    default                  : break;
  }

  if (conn->local_port == 6002){
    switch (conn->event){
      case XTCP_NEW_CONNECTION:
      case XTCP_POLL          : break;
      case XTCP_RECV_DATA     :
      {
        xtcp_ipaddr_t remote_addr = {conn->remote_addr[0],conn->remote_addr[1],conn->remote_addr[2],conn->remote_addr[3]};
        xtcp_recv(tcp_svr, (char *) data);
        xtcp_bind_remote(tcp_svr, conn, remote_addr, 6003);
        xtcp_init_send(tcp_svr, conn);
	printstrln("receive linker control frame");
      }
        break;
      case XTCP_REQUEST_DATA  :
      case XTCP_SENT_DATA     :
      case XTCP_RESEND_DATA   :
      {
    	xtcp_send(tcp_svr,ctrl_tx_buf.buf,ctrl_tx_buf.len);
        printstrln("send control frame ack");
      }
        break;
      case XTCP_CLOSED        :
    	xtcp_listen(tcp_svr, 6002, XTCP_PROTOCOL_UDP);
        break;
      default                 : break;
    }
    conn->event = XTCP_ALREADY_HANDLED;
  }
  return;
}